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linux/fs/ksmbd/smb2pdu.c
Amir Goldstein 868f9f2f8e vfs: fix copy_file_range() regression in cross-fs copies 
A regression has been reported by Nicolas Boichat, found while using the
copy_file_range syscall to copy a tracefs file.

Before commit 5dae222a5f ("vfs: allow copy_file_range to copy across
devices") the kernel would return -EXDEV to userspace when trying to
copy a file across different filesystems.  After this commit, the
syscall doesn't fail anymore and instead returns zero (zero bytes
copied), as this file's content is generated on-the-fly and thus reports
a size of zero.

Another regression has been reported by He Zhe - the assertion of
WARN_ON_ONCE(ret == -EOPNOTSUPP) can be triggered from userspace when
copying from a sysfs file whose read operation may return -EOPNOTSUPP.

Since we do not have test coverage for copy_file_range() between any two
types of filesystems, the best way to avoid these sort of issues in the
future is for the kernel to be more picky about filesystems that are
allowed to do copy_file_range().

This patch restores some cross-filesystem copy restrictions that existed
prior to commit 5dae222a5f ("vfs: allow copy_file_range to copy across
devices"), namely, cross-sb copy is not allowed for filesystems that do
not implement ->copy_file_range().

Filesystems that do implement ->copy_file_range() have full control of
the result - if this method returns an error, the error is returned to
the user.  Before this change this was only true for fs that did not
implement the ->remap_file_range() operation (i.e.  nfsv3).

Filesystems that do not implement ->copy_file_range() still fall-back to
the generic_copy_file_range() implementation when the copy is within the
same sb.  This helps the kernel can maintain a more consistent story
about which filesystems support copy_file_range().

nfsd and ksmbd servers are modified to fall-back to the
generic_copy_file_range() implementation in case vfs_copy_file_range()
fails with -EOPNOTSUPP or -EXDEV, which preserves behavior of
server-side-copy.

fall-back to generic_copy_file_range() is not implemented for the smb
operation FSCTL_DUPLICATE_EXTENTS_TO_FILE, which is arguably a correct
change of behavior.

Fixes: 5dae222a5f ("vfs: allow copy_file_range to copy across devices")
Link: https://lore.kernel.org/linux-fsdevel/20210212044405.4120619-1-drinkcat@chromium.org/
Link: https://lore.kernel.org/linux-fsdevel/CANMq1KDZuxir2LM5jOTm0xx+BnvW=ZmpsG47CyHFJwnw7zSX6Q@mail.gmail.com/
Link: https://lore.kernel.org/linux-fsdevel/20210126135012.1.If45b7cdc3ff707bc1efa17f5366057d60603c45f@changeid/
Link: https://lore.kernel.org/linux-fsdevel/20210630161320.29006-1-lhenriques@suse.de/
Reported-by: Nicolas Boichat <drinkcat@chromium.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Luis Henriques <lhenriques@suse.de>
Fixes: 64bf5ff58d ("vfs: no fallback for ->copy_file_range")
Link: https://lore.kernel.org/linux-fsdevel/20f17f64-88cb-4e80-07c1-85cb96c83619@windriver.com/
Reported-by: He Zhe <zhe.he@windriver.com>
Tested-by: Namjae Jeon <linkinjeon@kernel.org>
Tested-by: Luis Henriques <lhenriques@suse.de>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-06-30 15:16:38 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
*/
#include <linux/inetdevice.h>
#include <net/addrconf.h>
#include <linux/syscalls.h>
#include <linux/namei.h>
#include <linux/statfs.h>
#include <linux/ethtool.h>
#include <linux/falloc.h>
#include <linux/mount.h>
#include "glob.h"
#include "smbfsctl.h"
#include "oplock.h"
#include "smbacl.h"
#include "auth.h"
#include "asn1.h"
#include "connection.h"
#include "transport_ipc.h"
#include "transport_rdma.h"
#include "vfs.h"
#include "vfs_cache.h"
#include "misc.h"
#include "server.h"
#include "smb_common.h"
#include "smbstatus.h"
#include "ksmbd_work.h"
#include "mgmt/user_config.h"
#include "mgmt/share_config.h"
#include "mgmt/tree_connect.h"
#include "mgmt/user_session.h"
#include "mgmt/ksmbd_ida.h"
#include "ndr.h"
static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
{
if (work->next_smb2_rcv_hdr_off) {
*req = ksmbd_req_buf_next(work);
*rsp = ksmbd_resp_buf_next(work);
} else {
*req = smb2_get_msg(work->request_buf);
*rsp = smb2_get_msg(work->response_buf);
}
}
#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
/**
* check_session_id() - check for valid session id in smb header
* @conn: connection instance
* @id: session id from smb header
*
* Return: 1 if valid session id, otherwise 0
*/
static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
{
struct ksmbd_session *sess;
if (id == 0 || id == -1)
return false;
sess = ksmbd_session_lookup_all(conn, id);
if (sess)
return true;
pr_err("Invalid user session id: %llu\n", id);
return false;
}
struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
{
struct channel *chann;
list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
if (chann->conn == conn)
return chann;
}
return NULL;
}
/**
* smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
* @work: smb work
*
* Return: 0 if there is a tree connection matched or these are
* skipable commands, otherwise error
*/
int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
unsigned int cmd = le16_to_cpu(req_hdr->Command);
int tree_id;
work->tcon = NULL;
if (cmd == SMB2_TREE_CONNECT_HE ||
cmd == SMB2_CANCEL_HE ||
cmd == SMB2_LOGOFF_HE) {
ksmbd_debug(SMB, "skip to check tree connect request\n");
return 0;
}
if (xa_empty(&work->sess->tree_conns)) {
ksmbd_debug(SMB, "NO tree connected\n");
return -ENOENT;
}
tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
if (!work->tcon) {
pr_err("Invalid tid %d\n", tree_id);
return -EINVAL;
}
return 1;
}
/**
* smb2_set_err_rsp() - set error response code on smb response
* @work: smb work containing response buffer
*/
void smb2_set_err_rsp(struct ksmbd_work *work)
{
struct smb2_err_rsp *err_rsp;
if (work->next_smb2_rcv_hdr_off)
err_rsp = ksmbd_resp_buf_next(work);
else
err_rsp = smb2_get_msg(work->response_buf);
if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
err_rsp->ErrorContextCount = 0;
err_rsp->Reserved = 0;
err_rsp->ByteCount = 0;
err_rsp->ErrorData[0] = 0;
inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
}
}
/**
* is_smb2_neg_cmd() - is it smb2 negotiation command
* @work: smb work containing smb header
*
* Return: true if smb2 negotiation command, otherwise false
*/
bool is_smb2_neg_cmd(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
/* is it SMB2 header ? */
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
/* make sure it is request not response message */
if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
return false;
if (hdr->Command != SMB2_NEGOTIATE)
return false;
return true;
}
/**
* is_smb2_rsp() - is it smb2 response
* @work: smb work containing smb response buffer
*
* Return: true if smb2 response, otherwise false
*/
bool is_smb2_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
/* is it SMB2 header ? */
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
/* make sure it is response not request message */
if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
return false;
return true;
}
/**
* get_smb2_cmd_val() - get smb command code from smb header
* @work: smb work containing smb request buffer
*
* Return: smb2 request command value
*/
u16 get_smb2_cmd_val(struct ksmbd_work *work)
{
struct smb2_hdr *rcv_hdr;
if (work->next_smb2_rcv_hdr_off)
rcv_hdr = ksmbd_req_buf_next(work);
else
rcv_hdr = smb2_get_msg(work->request_buf);
return le16_to_cpu(rcv_hdr->Command);
}
/**
* set_smb2_rsp_status() - set error response code on smb2 header
* @work: smb work containing response buffer
* @err: error response code
*/
void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
{
struct smb2_hdr *rsp_hdr;
if (work->next_smb2_rcv_hdr_off)
rsp_hdr = ksmbd_resp_buf_next(work);
else
rsp_hdr = smb2_get_msg(work->response_buf);
rsp_hdr->Status = err;
smb2_set_err_rsp(work);
}
/**
* init_smb2_neg_rsp() - initialize smb2 response for negotiate command
* @work: smb work containing smb request buffer
*
* smb2 negotiate response is sent in reply of smb1 negotiate command for
* dialect auto-negotiation.
*/
int init_smb2_neg_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *rsp_hdr;
struct smb2_negotiate_rsp *rsp;
struct ksmbd_conn *conn = work->conn;
if (conn->need_neg == false)
return -EINVAL;
*(__be32 *)work->response_buf =
cpu_to_be32(conn->vals->header_size);
rsp_hdr = smb2_get_msg(work->response_buf);
memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->CreditRequest = cpu_to_le16(2);
rsp_hdr->Command = SMB2_NEGOTIATE;
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = 0;
rsp_hdr->Id.SyncId.ProcessId = 0;
rsp_hdr->Id.SyncId.TreeId = 0;
rsp_hdr->SessionId = 0;
memset(rsp_hdr->Signature, 0, 16);
rsp = smb2_get_msg(work->response_buf);
WARN_ON(ksmbd_conn_good(work));
rsp->StructureSize = cpu_to_le16(65);
ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
rsp->DialectRevision = cpu_to_le16(conn->dialect);
/* Not setting conn guid rsp->ServerGUID, as it
* not used by client for identifying connection
*/
rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
/* Default Max Message Size till SMB2.0, 64K*/
rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
rsp->SystemTime = cpu_to_le64(ksmbd_systime());
rsp->ServerStartTime = 0;
rsp->SecurityBufferOffset = cpu_to_le16(128);
rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
le16_to_cpu(rsp->SecurityBufferOffset));
inc_rfc1001_len(work->response_buf,
sizeof(struct smb2_negotiate_rsp) -
sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
AUTH_GSS_LENGTH);
rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
conn->use_spnego = true;
ksmbd_conn_set_need_negotiate(work);
return 0;
}
/**
* smb2_set_rsp_credits() - set number of credits in response buffer
* @work: smb work containing smb response buffer
*/
int smb2_set_rsp_credits(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
struct ksmbd_conn *conn = work->conn;
unsigned short credits_requested, aux_max;
unsigned short credit_charge, credits_granted = 0;
if (work->send_no_response)
return 0;
hdr->CreditCharge = req_hdr->CreditCharge;
if (conn->total_credits > conn->vals->max_credits) {
hdr->CreditRequest = 0;
pr_err("Total credits overflow: %d\n", conn->total_credits);
return -EINVAL;
}
credit_charge = max_t(unsigned short,
le16_to_cpu(req_hdr->CreditCharge), 1);
if (credit_charge > conn->total_credits) {
ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
credit_charge, conn->total_credits);
return -EINVAL;
}
conn->total_credits -= credit_charge;
conn->outstanding_credits -= credit_charge;
credits_requested = max_t(unsigned short,
le16_to_cpu(req_hdr->CreditRequest), 1);
/* according to smb2.credits smbtorture, Windows server
* 2016 or later grant up to 8192 credits at once.
*
* TODO: Need to adjuct CreditRequest value according to
* current cpu load
*/
if (hdr->Command == SMB2_NEGOTIATE)
aux_max = 1;
else
aux_max = conn->vals->max_credits - credit_charge;
credits_granted = min_t(unsigned short, credits_requested, aux_max);
if (conn->vals->max_credits - conn->total_credits < credits_granted)
credits_granted = conn->vals->max_credits -
conn->total_credits;
conn->total_credits += credits_granted;
work->credits_granted += credits_granted;
if (!req_hdr->NextCommand) {
/* Update CreditRequest in last request */
hdr->CreditRequest = cpu_to_le16(work->credits_granted);
}
ksmbd_debug(SMB,
"credits: requested[%d] granted[%d] total_granted[%d]\n",
credits_requested, credits_granted,
conn->total_credits);
return 0;
}
/**
* init_chained_smb2_rsp() - initialize smb2 chained response
* @work: smb work containing smb response buffer
*/
static void init_chained_smb2_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *req = ksmbd_req_buf_next(work);
struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
struct smb2_hdr *rsp_hdr;
struct smb2_hdr *rcv_hdr;
int next_hdr_offset = 0;
int len, new_len;
/* Len of this response = updated RFC len - offset of previous cmd
* in the compound rsp
*/
/* Storing the current local FID which may be needed by subsequent
* command in the compound request
*/
if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
work->compound_sid = le64_to_cpu(rsp->SessionId);
}
len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
next_hdr_offset = le32_to_cpu(req->NextCommand);
new_len = ALIGN(len, 8);
inc_rfc1001_len(work->response_buf,
sizeof(struct smb2_hdr) + new_len - len);
rsp->NextCommand = cpu_to_le32(new_len);
work->next_smb2_rcv_hdr_off += next_hdr_offset;
work->next_smb2_rsp_hdr_off += new_len;
ksmbd_debug(SMB,
"Compound req new_len = %d rcv off = %d rsp off = %d\n",
new_len, work->next_smb2_rcv_hdr_off,
work->next_smb2_rsp_hdr_off);
rsp_hdr = ksmbd_resp_buf_next(work);
rcv_hdr = ksmbd_req_buf_next(work);
if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
ksmbd_debug(SMB, "related flag should be set\n");
work->compound_fid = KSMBD_NO_FID;
work->compound_pfid = KSMBD_NO_FID;
}
memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->Command = rcv_hdr->Command;
/*
* Message is response. We don't grant oplock yet.
*/
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
SMB2_FLAGS_RELATED_OPERATIONS);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = rcv_hdr->MessageId;
rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
rsp_hdr->SessionId = rcv_hdr->SessionId;
memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
}
/**
* is_chained_smb2_message() - check for chained command
* @work: smb work containing smb request buffer
*
* Return: true if chained request, otherwise false
*/
bool is_chained_smb2_message(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
unsigned int len, next_cmd;
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
hdr = ksmbd_req_buf_next(work);
next_cmd = le32_to_cpu(hdr->NextCommand);
if (next_cmd > 0) {
if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
__SMB2_HEADER_STRUCTURE_SIZE >
get_rfc1002_len(work->request_buf)) {
pr_err("next command(%u) offset exceeds smb msg size\n",
next_cmd);
return false;
}
if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
work->response_sz) {
pr_err("next response offset exceeds response buffer size\n");
return false;
}
ksmbd_debug(SMB, "got SMB2 chained command\n");
init_chained_smb2_rsp(work);
return true;
} else if (work->next_smb2_rcv_hdr_off) {
/*
* This is last request in chained command,
* align response to 8 byte
*/
len = ALIGN(get_rfc1002_len(work->response_buf), 8);
len = len - get_rfc1002_len(work->response_buf);
if (len) {
ksmbd_debug(SMB, "padding len %u\n", len);
inc_rfc1001_len(work->response_buf, len);
if (work->aux_payload_sz)
work->aux_payload_sz += len;
}
}
return false;
}
/**
* init_smb2_rsp_hdr() - initialize smb2 response
* @work: smb work containing smb request buffer
*
* Return: 0
*/
int init_smb2_rsp_hdr(struct ksmbd_work *work)
{
struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
struct ksmbd_conn *conn = work->conn;
memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
*(__be32 *)work->response_buf =
cpu_to_be32(conn->vals->header_size);
rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->Command = rcv_hdr->Command;
/*
* Message is response. We don't grant oplock yet.
*/
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = rcv_hdr->MessageId;
rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
rsp_hdr->SessionId = rcv_hdr->SessionId;
memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
work->syncronous = true;
if (work->async_id) {
ksmbd_release_id(&conn->async_ida, work->async_id);
work->async_id = 0;
}
return 0;
}
/**
* smb2_allocate_rsp_buf() - allocate smb2 response buffer
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise -ENOMEM
*/
int smb2_allocate_rsp_buf(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
size_t large_sz = small_sz + work->conn->vals->max_trans_size;
size_t sz = small_sz;
int cmd = le16_to_cpu(hdr->Command);
if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
sz = large_sz;
if (cmd == SMB2_QUERY_INFO_HE) {
struct smb2_query_info_req *req;
req = smb2_get_msg(work->request_buf);
if (req->InfoType == SMB2_O_INFO_FILE &&
(req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
req->FileInfoClass == FILE_ALL_INFORMATION))
sz = large_sz;
}
/* allocate large response buf for chained commands */
if (le32_to_cpu(hdr->NextCommand) > 0)
sz = large_sz;
work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
if (!work->response_buf)
return -ENOMEM;
work->response_sz = sz;
return 0;
}
/**
* smb2_check_user_session() - check for valid session for a user
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_check_user_session(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
struct ksmbd_conn *conn = work->conn;
unsigned int cmd = conn->ops->get_cmd_val(work);
unsigned long long sess_id;
work->sess = NULL;
/*
* SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
* require a session id, so no need to validate user session's for
* these commands.
*/
if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
cmd == SMB2_SESSION_SETUP_HE)
return 0;
if (!ksmbd_conn_good(work))
return -EINVAL;
sess_id = le64_to_cpu(req_hdr->SessionId);
/* Check for validity of user session */
work->sess = ksmbd_session_lookup_all(conn, sess_id);
if (work->sess)
return 1;
ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
return -EINVAL;
}
static void destroy_previous_session(struct ksmbd_user *user, u64 id)
{
struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
struct ksmbd_user *prev_user;
if (!prev_sess)
return;
prev_user = prev_sess->user;
if (!prev_user ||
strcmp(user->name, prev_user->name) ||
user->passkey_sz != prev_user->passkey_sz ||
memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
put_session(prev_sess);
return;
}
put_session(prev_sess);
ksmbd_session_destroy(prev_sess);
}
/**
* smb2_get_name() - get filename string from on the wire smb format
* @src: source buffer
* @maxlen: maxlen of source string
* @local_nls: nls_table pointer
*
* Return: matching converted filename on success, otherwise error ptr
*/
static char *
smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
{
char *name;
name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
if (IS_ERR(name)) {
pr_err("failed to get name %ld\n", PTR_ERR(name));
return name;
}
ksmbd_conv_path_to_unix(name);
ksmbd_strip_last_slash(name);
return name;
}
int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
{
struct smb2_hdr *rsp_hdr;
struct ksmbd_conn *conn = work->conn;
int id;
rsp_hdr = smb2_get_msg(work->response_buf);
rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
id = ksmbd_acquire_async_msg_id(&conn->async_ida);
if (id < 0) {
pr_err("Failed to alloc async message id\n");
return id;
}
work->syncronous = false;
work->async_id = id;
rsp_hdr->Id.AsyncId = cpu_to_le64(id);
ksmbd_debug(SMB,
"Send interim Response to inform async request id : %d\n",
work->async_id);
work->cancel_fn = fn;
work->cancel_argv = arg;
if (list_empty(&work->async_request_entry)) {
spin_lock(&conn->request_lock);
list_add_tail(&work->async_request_entry, &conn->async_requests);
spin_unlock(&conn->request_lock);
}
return 0;
}
void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
{
struct smb2_hdr *rsp_hdr;
rsp_hdr = smb2_get_msg(work->response_buf);
smb2_set_err_rsp(work);
rsp_hdr->Status = status;
work->multiRsp = 1;
ksmbd_conn_write(work);
rsp_hdr->Status = 0;
work->multiRsp = 0;
}
static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
{
if (S_ISDIR(mode) || S_ISREG(mode))
return 0;
if (S_ISLNK(mode))
return IO_REPARSE_TAG_LX_SYMLINK_LE;
else if (S_ISFIFO(mode))
return IO_REPARSE_TAG_LX_FIFO_LE;
else if (S_ISSOCK(mode))
return IO_REPARSE_TAG_AF_UNIX_LE;
else if (S_ISCHR(mode))
return IO_REPARSE_TAG_LX_CHR_LE;
else if (S_ISBLK(mode))
return IO_REPARSE_TAG_LX_BLK_LE;
return 0;
}
/**
* smb2_get_dos_mode() - get file mode in dos format from unix mode
* @stat: kstat containing file mode
* @attribute: attribute flags
*
* Return: converted dos mode
*/
static int smb2_get_dos_mode(struct kstat *stat, int attribute)
{
int attr = 0;
if (S_ISDIR(stat->mode)) {
attr = FILE_ATTRIBUTE_DIRECTORY |
(attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
} else {
attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
FILE_SUPPORTS_SPARSE_FILES))
attr |= FILE_ATTRIBUTE_SPARSE_FILE;
if (smb2_get_reparse_tag_special_file(stat->mode))
attr |= FILE_ATTRIBUTE_REPARSE_POINT;
}
return attr;
}
static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
__le16 hash_id)
{
pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
pneg_ctxt->DataLength = cpu_to_le16(38);
pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
pneg_ctxt->HashAlgorithms = hash_id;
}
static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
__le16 cipher_type)
{
pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
pneg_ctxt->DataLength = cpu_to_le16(4);
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->CipherCount = cpu_to_le16(1);
pneg_ctxt->Ciphers[0] = cipher_type;
}
static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
__le16 comp_algo)
{
pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
pneg_ctxt->DataLength =
cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
- sizeof(struct smb2_neg_context));
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->Flags = cpu_to_le32(0);
pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
}
static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
__le16 sign_algo)
{
pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
pneg_ctxt->DataLength =
cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
- sizeof(struct smb2_neg_context));
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->SigningAlgorithms[0] = sign_algo;
}
static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
{
pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
pneg_ctxt->Name[0] = 0x93;
pneg_ctxt->Name[1] = 0xAD;
pneg_ctxt->Name[2] = 0x25;
pneg_ctxt->Name[3] = 0x50;
pneg_ctxt->Name[4] = 0x9C;
pneg_ctxt->Name[5] = 0xB4;
pneg_ctxt->Name[6] = 0x11;
pneg_ctxt->Name[7] = 0xE7;
pneg_ctxt->Name[8] = 0xB4;
pneg_ctxt->Name[9] = 0x23;
pneg_ctxt->Name[10] = 0x83;
pneg_ctxt->Name[11] = 0xDE;
pneg_ctxt->Name[12] = 0x96;
pneg_ctxt->Name[13] = 0x8B;
pneg_ctxt->Name[14] = 0xCD;
pneg_ctxt->Name[15] = 0x7C;
}
static void assemble_neg_contexts(struct ksmbd_conn *conn,
struct smb2_negotiate_rsp *rsp,
void *smb2_buf_len)
{
char *pneg_ctxt = (char *)rsp +
le32_to_cpu(rsp->NegotiateContextOffset);
int neg_ctxt_cnt = 1;
int ctxt_size;
ksmbd_debug(SMB,
"assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
conn->preauth_info->Preauth_HashId);
rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
ctxt_size = sizeof(struct smb2_preauth_neg_context);
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
if (conn->cipher_type) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
conn->cipher_type);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
/* Round to 8 byte boundary */
pneg_ctxt +=
round_up(sizeof(struct smb2_encryption_neg_context) + 2,
8);
}
if (conn->compress_algorithm) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_COMPRESSION_CAPABILITIES context\n");
/* Temporarily set to SMB3_COMPRESS_NONE */
build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
conn->compress_algorithm);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
8);
}
if (conn->posix_ext_supported) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_posix_neg_context);
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
}
if (conn->signing_negotiated) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_SIGNING_CAPABILITIES context\n");
build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
conn->signing_algorithm);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
}
inc_rfc1001_len(smb2_buf_len, ctxt_size);
}
static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
struct smb2_preauth_neg_context *pneg_ctxt)
{
__le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
conn->preauth_info->Preauth_HashId =
SMB2_PREAUTH_INTEGRITY_SHA512;
err = STATUS_SUCCESS;
}
return err;
}
static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
struct smb2_encryption_neg_context *pneg_ctxt,
int len_of_ctxts)
{
int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
int i, cphs_size = cph_cnt * sizeof(__le16);
conn->cipher_type = 0;
if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
len_of_ctxts) {
pr_err("Invalid cipher count(%d)\n", cph_cnt);
return;
}
if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
return;
for (i = 0; i < cph_cnt; i++) {
if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
pneg_ctxt->Ciphers[i]);
conn->cipher_type = pneg_ctxt->Ciphers[i];
break;
}
}
}
/**
* smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
* @conn: smb connection
*
* Return: true if connection should be encrypted, else false
*/
static bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
{
if (!conn->ops->generate_encryptionkey)
return false;
/*
* SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
* SMB 3.1.1 uses the cipher_type field.
*/
return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
conn->cipher_type;
}
static void decode_compress_ctxt(struct ksmbd_conn *conn,
struct smb2_compression_capabilities_context *pneg_ctxt)
{
conn->compress_algorithm = SMB3_COMPRESS_NONE;
}
static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
struct smb2_signing_capabilities *pneg_ctxt,
int len_of_ctxts)
{
int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
conn->signing_negotiated = false;
if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
len_of_ctxts) {
pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
return;
}
for (i = 0; i < sign_algo_cnt; i++) {
if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
pneg_ctxt->SigningAlgorithms[i]);
conn->signing_negotiated = true;
conn->signing_algorithm =
pneg_ctxt->SigningAlgorithms[i];
break;
}
}
}
static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
struct smb2_negotiate_req *req,
int len_of_smb)
{
/* +4 is to account for the RFC1001 len field */
struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
int i = 0, len_of_ctxts;
int offset = le32_to_cpu(req->NegotiateContextOffset);
int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
__le32 status = STATUS_INVALID_PARAMETER;
ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
if (len_of_smb <= offset) {
ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
return status;
}
len_of_ctxts = len_of_smb - offset;
while (i++ < neg_ctxt_cnt) {
int clen;
/* check that offset is not beyond end of SMB */
if (len_of_ctxts == 0)
break;
if (len_of_ctxts < sizeof(struct smb2_neg_context))
break;
pctx = (struct smb2_neg_context *)((char *)pctx + offset);
clen = le16_to_cpu(pctx->DataLength);
if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
break;
if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
if (conn->preauth_info->Preauth_HashId)
break;
status = decode_preauth_ctxt(conn,
(struct smb2_preauth_neg_context *)pctx);
if (status != STATUS_SUCCESS)
break;
} else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
if (conn->cipher_type)
break;
decode_encrypt_ctxt(conn,
(struct smb2_encryption_neg_context *)pctx,
len_of_ctxts);
} else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
if (conn->compress_algorithm)
break;
decode_compress_ctxt(conn,
(struct smb2_compression_capabilities_context *)pctx);
} else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
ksmbd_debug(SMB,
"deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
} else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
ksmbd_debug(SMB,
"deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
conn->posix_ext_supported = true;
} else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_SIGNING_CAPABILITIES context\n");
decode_sign_cap_ctxt(conn,
(struct smb2_signing_capabilities *)pctx,
len_of_ctxts);
}
/* offsets must be 8 byte aligned */
clen = (clen + 7) & ~0x7;
offset = clen + sizeof(struct smb2_neg_context);
len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
}
return status;
}
/**
* smb2_handle_negotiate() - handler for smb2 negotiate command
* @work: smb work containing smb request buffer
*
* Return: 0
*/
int smb2_handle_negotiate(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
int rc = 0;
unsigned int smb2_buf_len, smb2_neg_size;
__le32 status;
ksmbd_debug(SMB, "Received negotiate request\n");
conn->need_neg = false;
if (ksmbd_conn_good(work)) {
pr_err("conn->tcp_status is already in CifsGood State\n");
work->send_no_response = 1;
return rc;
}
if (req->DialectCount == 0) {
pr_err("malformed packet\n");
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
smb2_buf_len = get_rfc1002_len(work->request_buf);
smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
if (smb2_neg_size > smb2_buf_len) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (conn->dialect == SMB311_PROT_ID) {
unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
if (smb2_buf_len < nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (smb2_neg_size > nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
} else {
if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
smb2_buf_len) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
}
conn->cli_cap = le32_to_cpu(req->Capabilities);
switch (conn->dialect) {
case SMB311_PROT_ID:
conn->preauth_info =
kzalloc(sizeof(struct preauth_integrity_info),
GFP_KERNEL);
if (!conn->preauth_info) {
rc = -ENOMEM;
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto err_out;
}
status = deassemble_neg_contexts(conn, req,
get_rfc1002_len(work->request_buf));
if (status != STATUS_SUCCESS) {
pr_err("deassemble_neg_contexts error(0x%x)\n",
status);
rsp->hdr.Status = status;
rc = -EINVAL;
goto err_out;
}
rc = init_smb3_11_server(conn);
if (rc < 0) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto err_out;
}
ksmbd_gen_preauth_integrity_hash(conn,
work->request_buf,
conn->preauth_info->Preauth_HashValue);
rsp->NegotiateContextOffset =
cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
assemble_neg_contexts(conn, rsp, work->response_buf);
break;
case SMB302_PROT_ID:
init_smb3_02_server(conn);
break;
case SMB30_PROT_ID:
init_smb3_0_server(conn);
break;
case SMB21_PROT_ID:
init_smb2_1_server(conn);
break;
case SMB2X_PROT_ID:
case BAD_PROT_ID:
default:
ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
conn->dialect);
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
rc = -EINVAL;
goto err_out;
}
rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
/* For stats */
conn->connection_type = conn->dialect;
rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
memcpy(conn->ClientGUID, req->ClientGUID,
SMB2_CLIENT_GUID_SIZE);
conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
rsp->StructureSize = cpu_to_le16(65);
rsp->DialectRevision = cpu_to_le16(conn->dialect);
/* Not setting conn guid rsp->ServerGUID, as it
* not used by client for identifying server
*/
memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
rsp->SystemTime = cpu_to_le64(ksmbd_systime());
rsp->ServerStartTime = 0;
ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
le32_to_cpu(rsp->NegotiateContextOffset),
le16_to_cpu(rsp->NegotiateContextCount));
rsp->SecurityBufferOffset = cpu_to_le16(128);
rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
le16_to_cpu(rsp->SecurityBufferOffset));
inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
AUTH_GSS_LENGTH);
rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
conn->use_spnego = true;
if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
conn->sign = true;
else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
server_conf.enforced_signing = true;
rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
conn->sign = true;
}
conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
ksmbd_conn_set_need_negotiate(work);
err_out:
if (rc < 0)
smb2_set_err_rsp(work);
return rc;
}
static int alloc_preauth_hash(struct ksmbd_session *sess,
struct ksmbd_conn *conn)
{
if (sess->Preauth_HashValue)
return 0;
sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
if (!sess->Preauth_HashValue)
return -ENOMEM;
return 0;
}
static int generate_preauth_hash(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
u8 *preauth_hash;
if (conn->dialect != SMB311_PROT_ID)
return 0;
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
if (!preauth_sess) {
preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
if (!preauth_sess)
return -ENOMEM;
}
preauth_hash = preauth_sess->Preauth_HashValue;
} else {
if (!sess->Preauth_HashValue)
if (alloc_preauth_hash(sess, conn))
return -ENOMEM;
preauth_hash = sess->Preauth_HashValue;
}
ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
return 0;
}
static int decode_negotiation_token(struct ksmbd_conn *conn,
struct negotiate_message *negblob,
size_t sz)
{
if (!conn->use_spnego)
return -EINVAL;
if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
conn->use_spnego = false;
}
}
return 0;
}
static int ntlm_negotiate(struct ksmbd_work *work,
struct negotiate_message *negblob,
size_t negblob_len)
{
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct challenge_message *chgblob;
unsigned char *spnego_blob = NULL;
u16 spnego_blob_len;
char *neg_blob;
int sz, rc;
ksmbd_debug(SMB, "negotiate phase\n");
rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
if (rc)
return rc;
sz = le16_to_cpu(rsp->SecurityBufferOffset);
chgblob =
(struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
memset(chgblob, 0, sizeof(struct challenge_message));
if (!work->conn->use_spnego) {
sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
if (sz < 0)
return -ENOMEM;
rsp->SecurityBufferLength = cpu_to_le16(sz);
return 0;
}
sz = sizeof(struct challenge_message);
sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
neg_blob = kzalloc(sz, GFP_KERNEL);
if (!neg_blob)
return -ENOMEM;
chgblob = (struct challenge_message *)neg_blob;
sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
if (sz < 0) {
rc = -ENOMEM;
goto out;
}
rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
neg_blob, sz);
if (rc) {
rc = -ENOMEM;
goto out;
}
sz = le16_to_cpu(rsp->SecurityBufferOffset);
memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
out:
kfree(spnego_blob);
kfree(neg_blob);
return rc;
}
static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
struct smb2_sess_setup_req *req)
{
int sz;
if (conn->use_spnego && conn->mechToken)
return (struct authenticate_message *)conn->mechToken;
sz = le16_to_cpu(req->SecurityBufferOffset);
return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
+ sz);
}
static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
struct smb2_sess_setup_req *req)
{
struct authenticate_message *authblob;
struct ksmbd_user *user;
char *name;
unsigned int auth_msg_len, name_off, name_len, secbuf_len;
secbuf_len = le16_to_cpu(req->SecurityBufferLength);
if (secbuf_len < sizeof(struct authenticate_message)) {
ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
return NULL;
}
authblob = user_authblob(conn, req);
name_off = le32_to_cpu(authblob->UserName.BufferOffset);
name_len = le16_to_cpu(authblob->UserName.Length);
auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
if (auth_msg_len < (u64)name_off + name_len)
return NULL;
name = smb_strndup_from_utf16((const char *)authblob + name_off,
name_len,
true,
conn->local_nls);
if (IS_ERR(name)) {
pr_err("cannot allocate memory\n");
return NULL;
}
ksmbd_debug(SMB, "session setup request for user %s\n", name);
user = ksmbd_login_user(name);
kfree(name);
return user;
}
static int ntlm_authenticate(struct ksmbd_work *work)
{
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct channel *chann = NULL;
struct ksmbd_user *user;
u64 prev_id;
int sz, rc;
ksmbd_debug(SMB, "authenticate phase\n");
if (conn->use_spnego) {
unsigned char *spnego_blob;
u16 spnego_blob_len;
rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
&spnego_blob_len,
0);
if (rc)
return -ENOMEM;
sz = le16_to_cpu(rsp->SecurityBufferOffset);
memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
kfree(spnego_blob);
inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
}
user = session_user(conn, req);
if (!user) {
ksmbd_debug(SMB, "Unknown user name or an error\n");
return -EPERM;
}
/* Check for previous session */
prev_id = le64_to_cpu(req->PreviousSessionId);
if (prev_id && prev_id != sess->id)
destroy_previous_session(user, prev_id);
if (sess->state == SMB2_SESSION_VALID) {
/*
* Reuse session if anonymous try to connect
* on reauthetication.
*/
if (ksmbd_anonymous_user(user)) {
ksmbd_free_user(user);
return 0;
}
if (!ksmbd_compare_user(sess->user, user)) {
ksmbd_free_user(user);
return -EPERM;
}
ksmbd_free_user(user);
} else {
sess->user = user;
}
if (user_guest(sess->user)) {
rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
} else {
struct authenticate_message *authblob;
authblob = user_authblob(conn, req);
sz = le16_to_cpu(req->SecurityBufferLength);
rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
if (rc) {
set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
ksmbd_debug(SMB, "authentication failed\n");
return -EPERM;
}
}
/*
* If session state is SMB2_SESSION_VALID, We can assume
* that it is reauthentication. And the user/password
* has been verified, so return it here.
*/
if (sess->state == SMB2_SESSION_VALID) {
if (conn->binding)
goto binding_session;
return 0;
}
if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
(conn->sign || server_conf.enforced_signing)) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
if (smb3_encryption_negotiated(conn) &&
!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
rc = conn->ops->generate_encryptionkey(sess);
if (rc) {
ksmbd_debug(SMB,
"SMB3 encryption key generation failed\n");
return -EINVAL;
}
sess->enc = true;
rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
/*
* signing is disable if encryption is enable
* on this session
*/
sess->sign = false;
}
binding_session:
if (conn->dialect >= SMB30_PROT_ID) {
chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
return -ENOMEM;
chann->conn = conn;
INIT_LIST_HEAD(&chann->chann_list);
list_add(&chann->chann_list, &sess->ksmbd_chann_list);
}
}
if (conn->ops->generate_signingkey) {
rc = conn->ops->generate_signingkey(sess, conn);
if (rc) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
return -EINVAL;
}
}
if (!ksmbd_conn_lookup_dialect(conn)) {
pr_err("fail to verify the dialect\n");
return -ENOENT;
}
return 0;
}
#ifdef CONFIG_SMB_SERVER_KERBEROS5
static int krb5_authenticate(struct ksmbd_work *work)
{
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
char *in_blob, *out_blob;
struct channel *chann = NULL;
u64 prev_sess_id;
int in_len, out_len;
int retval;
in_blob = (char *)&req->hdr.ProtocolId +
le16_to_cpu(req->SecurityBufferOffset);
in_len = le16_to_cpu(req->SecurityBufferLength);
out_blob = (char *)&rsp->hdr.ProtocolId +
le16_to_cpu(rsp->SecurityBufferOffset);
out_len = work->response_sz -
(le16_to_cpu(rsp->SecurityBufferOffset) + 4);
/* Check previous session */
prev_sess_id = le64_to_cpu(req->PreviousSessionId);
if (prev_sess_id && prev_sess_id != sess->id)
destroy_previous_session(sess->user, prev_sess_id);
if (sess->state == SMB2_SESSION_VALID)
ksmbd_free_user(sess->user);
retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
out_blob, &out_len);
if (retval) {
ksmbd_debug(SMB, "krb5 authentication failed\n");
return -EINVAL;
}
rsp->SecurityBufferLength = cpu_to_le16(out_len);
inc_rfc1001_len(work->response_buf, out_len - 1);
if ((conn->sign || server_conf.enforced_signing) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
if (smb3_encryption_negotiated(conn)) {
retval = conn->ops->generate_encryptionkey(sess);
if (retval) {
ksmbd_debug(SMB,
"SMB3 encryption key generation failed\n");
return -EINVAL;
}
sess->enc = true;
rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
sess->sign = false;
}
if (conn->dialect >= SMB30_PROT_ID) {
chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
return -ENOMEM;
chann->conn = conn;
INIT_LIST_HEAD(&chann->chann_list);
list_add(&chann->chann_list, &sess->ksmbd_chann_list);
}
}
if (conn->ops->generate_signingkey) {
retval = conn->ops->generate_signingkey(sess, conn);
if (retval) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
return -EINVAL;
}
}
if (!ksmbd_conn_lookup_dialect(conn)) {
pr_err("fail to verify the dialect\n");
return -ENOENT;
}
return 0;
}
#else
static int krb5_authenticate(struct ksmbd_work *work)
{
return -EOPNOTSUPP;
}
#endif
int smb2_sess_setup(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess;
struct negotiate_message *negblob;
unsigned int negblob_len, negblob_off;
int rc = 0;
ksmbd_debug(SMB, "Received request for session setup\n");
rsp->StructureSize = cpu_to_le16(9);
rsp->SessionFlags = 0;
rsp->SecurityBufferOffset = cpu_to_le16(72);
rsp->SecurityBufferLength = 0;
inc_rfc1001_len(work->response_buf, 9);
if (!req->hdr.SessionId) {
sess = ksmbd_smb2_session_create();
if (!sess) {
rc = -ENOMEM;
goto out_err;
}
rsp->hdr.SessionId = cpu_to_le64(sess->id);
ksmbd_session_register(conn, sess);
} else if (conn->dialect >= SMB30_PROT_ID &&
(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
u64 sess_id = le64_to_cpu(req->hdr.SessionId);
sess = ksmbd_session_lookup_slowpath(sess_id);
if (!sess) {
rc = -ENOENT;
goto out_err;
}
if (conn->dialect != sess->conn->dialect) {
rc = -EINVAL;
goto out_err;
}
if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
rc = -EINVAL;
goto out_err;
}
if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
SMB2_CLIENT_GUID_SIZE)) {
rc = -ENOENT;
goto out_err;
}
if (sess->state == SMB2_SESSION_IN_PROGRESS) {
rc = -EACCES;
goto out_err;
}
if (sess->state == SMB2_SESSION_EXPIRED) {
rc = -EFAULT;
goto out_err;
}
if (ksmbd_session_lookup(conn, sess_id)) {
rc = -EACCES;
goto out_err;
}
conn->binding = true;
} else if ((conn->dialect < SMB30_PROT_ID ||
server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
sess = NULL;
rc = -EACCES;
goto out_err;
} else {
sess = ksmbd_session_lookup(conn,
le64_to_cpu(req->hdr.SessionId));
if (!sess) {
rc = -ENOENT;
goto out_err;
}
}
work->sess = sess;
if (sess->state == SMB2_SESSION_EXPIRED)
sess->state = SMB2_SESSION_IN_PROGRESS;
negblob_off = le16_to_cpu(req->SecurityBufferOffset);
negblob_len = le16_to_cpu(req->SecurityBufferLength);
if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
rc = -EINVAL;
goto out_err;
}
negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
negblob_off);
if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
if (conn->mechToken)
negblob = (struct negotiate_message *)conn->mechToken;
}
if (server_conf.auth_mechs & conn->auth_mechs) {
rc = generate_preauth_hash(work);
if (rc)
goto out_err;
if (conn->preferred_auth_mech &
(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
rc = krb5_authenticate(work);
if (rc) {
rc = -EINVAL;
goto out_err;
}
ksmbd_conn_set_good(work);
sess->state = SMB2_SESSION_VALID;
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
if (negblob->MessageType == NtLmNegotiate) {
rc = ntlm_negotiate(work, negblob, negblob_len);
if (rc)
goto out_err;
rsp->hdr.Status =
STATUS_MORE_PROCESSING_REQUIRED;
/*
* Note: here total size -1 is done as an
* adjustment for 0 size blob
*/
inc_rfc1001_len(work->response_buf,
le16_to_cpu(rsp->SecurityBufferLength) - 1);
} else if (negblob->MessageType == NtLmAuthenticate) {
rc = ntlm_authenticate(work);
if (rc)
goto out_err;
ksmbd_conn_set_good(work);
sess->state = SMB2_SESSION_VALID;
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess =
ksmbd_preauth_session_lookup(conn, sess->id);
if (preauth_sess) {
list_del(&preauth_sess->preauth_entry);
kfree(preauth_sess);
}
}
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
}
} else {
/* TODO: need one more negotiation */
pr_err("Not support the preferred authentication\n");
rc = -EINVAL;
}
} else {
pr_err("Not support authentication\n");
rc = -EINVAL;
}
out_err:
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
else if (rc == -EACCES)
rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
else if (rc == -EFAULT)
rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
else if (rc == -ENOMEM)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
else if (rc)
rsp->hdr.Status = STATUS_LOGON_FAILURE;
if (conn->use_spnego && conn->mechToken) {
kfree(conn->mechToken);
conn->mechToken = NULL;
}
if (rc < 0) {
/*
* SecurityBufferOffset should be set to zero
* in session setup error response.
*/
rsp->SecurityBufferOffset = 0;
if (sess) {
bool try_delay = false;
/*
* To avoid dictionary attacks (repeated session setups rapidly sent) to
* connect to server, ksmbd make a delay of a 5 seconds on session setup
* failure to make it harder to send enough random connection requests
* to break into a server.
*/
if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
try_delay = true;
ksmbd_session_destroy(sess);
work->sess = NULL;
if (try_delay)
ssleep(5);
}
}
return rc;
}
/**
* smb2_tree_connect() - handler for smb2 tree connect command
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_tree_connect(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess = work->sess;
char *treename = NULL, *name = NULL;
struct ksmbd_tree_conn_status status;
struct ksmbd_share_config *share;
int rc = -EINVAL;
treename = smb_strndup_from_utf16(req->Buffer,
le16_to_cpu(req->PathLength), true,
conn->local_nls);
if (IS_ERR(treename)) {
pr_err("treename is NULL\n");
status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
goto out_err1;
}
name = ksmbd_extract_sharename(treename);
if (IS_ERR(name)) {
status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
goto out_err1;
}
ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
name, treename);
status = ksmbd_tree_conn_connect(sess, name);
if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
else
goto out_err1;
share = status.tree_conn->share_conf;
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC share path request\n");
rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
FILE_DELETE_LE | FILE_READ_CONTROL_LE |
FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
FILE_SYNCHRONIZE_LE;
} else {
rsp->ShareType = SMB2_SHARE_TYPE_DISK;
rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
if (test_tree_conn_flag(status.tree_conn,
KSMBD_TREE_CONN_FLAG_WRITABLE)) {
rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
FILE_SYNCHRONIZE_LE;
}
}
status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
if (conn->posix_ext_supported)
status.tree_conn->posix_extensions = true;
out_err1:
rsp->StructureSize = cpu_to_le16(16);
rsp->Capabilities = 0;
rsp->Reserved = 0;
/* default manual caching */
rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
inc_rfc1001_len(work->response_buf, 16);
if (!IS_ERR(treename))
kfree(treename);
if (!IS_ERR(name))
kfree(name);
switch (status.ret) {
case KSMBD_TREE_CONN_STATUS_OK:
rsp->hdr.Status = STATUS_SUCCESS;
rc = 0;
break;
case KSMBD_TREE_CONN_STATUS_NO_SHARE:
rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
break;
case -ENOMEM:
case KSMBD_TREE_CONN_STATUS_NOMEM:
rsp->hdr.Status = STATUS_NO_MEMORY;
break;
case KSMBD_TREE_CONN_STATUS_ERROR:
case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
rsp->hdr.Status = STATUS_ACCESS_DENIED;
break;
case -EINVAL:
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
break;
default:
rsp->hdr.Status = STATUS_ACCESS_DENIED;
}
return rc;
}
/**
* smb2_create_open_flags() - convert smb open flags to unix open flags
* @file_present: is file already present
* @access: file access flags
* @disposition: file disposition flags
* @may_flags: set with MAY_ flags
*
* Return: file open flags
*/
static int smb2_create_open_flags(bool file_present, __le32 access,
__le32 disposition,
int *may_flags)
{
int oflags = O_NONBLOCK | O_LARGEFILE;
if (access & FILE_READ_DESIRED_ACCESS_LE &&
access & FILE_WRITE_DESIRE_ACCESS_LE) {
oflags |= O_RDWR;
*may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
} else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
oflags |= O_WRONLY;
*may_flags = MAY_OPEN | MAY_WRITE;
} else {
oflags |= O_RDONLY;
*may_flags = MAY_OPEN | MAY_READ;
}
if (access == FILE_READ_ATTRIBUTES_LE)
oflags |= O_PATH;
if (file_present) {
switch (disposition & FILE_CREATE_MASK_LE) {
case FILE_OPEN_LE:
case FILE_CREATE_LE:
break;
case FILE_SUPERSEDE_LE:
case FILE_OVERWRITE_LE:
case FILE_OVERWRITE_IF_LE:
oflags |= O_TRUNC;
break;
default:
break;
}
} else {
switch (disposition & FILE_CREATE_MASK_LE) {
case FILE_SUPERSEDE_LE:
case FILE_CREATE_LE:
case FILE_OPEN_IF_LE:
case FILE_OVERWRITE_IF_LE:
oflags |= O_CREAT;
break;
case FILE_OPEN_LE:
case FILE_OVERWRITE_LE:
oflags &= ~O_CREAT;
break;
default:
break;
}
}
return oflags;
}
/**
* smb2_tree_disconnect() - handler for smb tree connect request
* @work: smb work containing request buffer
*
* Return: 0
*/
int smb2_tree_disconnect(struct ksmbd_work *work)
{
struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess = work->sess;
struct ksmbd_tree_connect *tcon = work->tcon;
rsp->StructureSize = cpu_to_le16(4);
inc_rfc1001_len(work->response_buf, 4);
ksmbd_debug(SMB, "request\n");
if (!tcon) {
struct smb2_tree_disconnect_req *req =
smb2_get_msg(work->request_buf);
ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
smb2_set_err_rsp(work);
return 0;
}
ksmbd_close_tree_conn_fds(work);
ksmbd_tree_conn_disconnect(sess, tcon);
return 0;
}
/**
* smb2_session_logoff() - handler for session log off request
* @work: smb work containing request buffer
*
* Return: 0
*/
int smb2_session_logoff(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess = work->sess;
rsp->StructureSize = cpu_to_le16(4);
inc_rfc1001_len(work->response_buf, 4);
ksmbd_debug(SMB, "request\n");
/* setting CifsExiting here may race with start_tcp_sess */
ksmbd_conn_set_need_reconnect(work);
ksmbd_close_session_fds(work);
ksmbd_conn_wait_idle(conn);
if (ksmbd_tree_conn_session_logoff(sess)) {
struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
smb2_set_err_rsp(work);
return 0;
}
ksmbd_destroy_file_table(&sess->file_table);
sess->state = SMB2_SESSION_EXPIRED;
ksmbd_free_user(sess->user);
sess->user = NULL;
/* let start_tcp_sess free connection info now */
ksmbd_conn_set_need_negotiate(work);
return 0;
}
/**
* create_smb2_pipe() - create IPC pipe
* @work: smb work containing request buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int create_smb2_pipe(struct ksmbd_work *work)
{
struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
struct smb2_create_req *req = smb2_get_msg(work->request_buf);
int id;
int err;
char *name;
name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
1, work->conn->local_nls);
if (IS_ERR(name)) {
rsp->hdr.Status = STATUS_NO_MEMORY;
err = PTR_ERR(name);
goto out;
}
id = ksmbd_session_rpc_open(work->sess, name);
if (id < 0) {
pr_err("Unable to open RPC pipe: %d\n", id);
err = id;
goto out;
}
rsp->hdr.Status = STATUS_SUCCESS;
rsp->StructureSize = cpu_to_le16(89);
rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
rsp->Flags = 0;
rsp->CreateAction = cpu_to_le32(FILE_OPENED);
rsp->CreationTime = cpu_to_le64(0);
rsp->LastAccessTime = cpu_to_le64(0);
rsp->ChangeTime = cpu_to_le64(0);
rsp->AllocationSize = cpu_to_le64(0);
rsp->EndofFile = cpu_to_le64(0);
rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
rsp->Reserved2 = 0;
rsp->VolatileFileId = id;
rsp->PersistentFileId = 0;
rsp->CreateContextsOffset = 0;
rsp->CreateContextsLength = 0;
inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
kfree(name);
return 0;
out:
switch (err) {
case -EINVAL:
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
break;
case -ENOSPC:
case -ENOMEM:
rsp->hdr.Status = STATUS_NO_MEMORY;
break;
}
if (!IS_ERR(name))
kfree(name);
smb2_set_err_rsp(work);
return err;
}
/**
* smb2_set_ea() - handler for setting extended attributes using set
* info command
* @eabuf: set info command buffer
* @buf_len: set info command buffer length
* @path: dentry path for get ea
*
* Return: 0 on success, otherwise error
*/
static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
struct path *path)
{
struct user_namespace *user_ns = mnt_user_ns(path->mnt);
char *attr_name = NULL, *value;
int rc = 0;
unsigned int next = 0;
if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
le16_to_cpu(eabuf->EaValueLength))
return -EINVAL;
attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
if (!attr_name)
return -ENOMEM;
do {
if (!eabuf->EaNameLength)
goto next;
ksmbd_debug(SMB,
"name : <%s>, name_len : %u, value_len : %u, next : %u\n",
eabuf->name, eabuf->EaNameLength,
le16_to_cpu(eabuf->EaValueLength),
le32_to_cpu(eabuf->NextEntryOffset));
if (eabuf->EaNameLength >
(XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
rc = -EINVAL;
break;
}
memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
eabuf->EaNameLength);
attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
if (!eabuf->EaValueLength) {
rc = ksmbd_vfs_casexattr_len(user_ns,
path->dentry,
attr_name,
XATTR_USER_PREFIX_LEN +
eabuf->EaNameLength);
/* delete the EA only when it exits */
if (rc > 0) {
rc = ksmbd_vfs_remove_xattr(user_ns,
path->dentry,
attr_name);
if (rc < 0) {
ksmbd_debug(SMB,
"remove xattr failed(%d)\n",
rc);
break;
}
}
/* if the EA doesn't exist, just do nothing. */
rc = 0;
} else {
rc = ksmbd_vfs_setxattr(user_ns,
path->dentry, attr_name, value,
le16_to_cpu(eabuf->EaValueLength), 0);
if (rc < 0) {
ksmbd_debug(SMB,
"ksmbd_vfs_setxattr is failed(%d)\n",
rc);
break;
}
}
next:
next = le32_to_cpu(eabuf->NextEntryOffset);
if (next == 0 || buf_len < next)
break;
buf_len -= next;
eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
break;
} while (next != 0);
kfree(attr_name);
return rc;
}
static noinline int smb2_set_stream_name_xattr(struct path *path,
struct ksmbd_file *fp,
char *stream_name, int s_type)
{
struct user_namespace *user_ns = mnt_user_ns(path->mnt);
size_t xattr_stream_size;
char *xattr_stream_name;
int rc;
rc = ksmbd_vfs_xattr_stream_name(stream_name,
&xattr_stream_name,
&xattr_stream_size,
s_type);
if (rc)
return rc;
fp->stream.name = xattr_stream_name;
fp->stream.size = xattr_stream_size;
/* Check if there is stream prefix in xattr space */
rc = ksmbd_vfs_casexattr_len(user_ns,
path->dentry,
xattr_stream_name,
xattr_stream_size);
if (rc >= 0)
return 0;
if (fp->cdoption == FILE_OPEN_LE) {
ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
return -EBADF;
}
rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
xattr_stream_name, NULL, 0, 0);
if (rc < 0)
pr_err("Failed to store XATTR stream name :%d\n", rc);
return 0;
}
static int smb2_remove_smb_xattrs(struct path *path)
{
struct user_namespace *user_ns = mnt_user_ns(path->mnt);
char *name, *xattr_list = NULL;
ssize_t xattr_list_len;
int err = 0;
xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (xattr_list_len < 0) {
goto out;
} else if (!xattr_list_len) {
ksmbd_debug(SMB, "empty xattr in the file\n");
goto out;
}
for (name = xattr_list; name - xattr_list < xattr_list_len;
name += strlen(name) + 1) {
ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
DOS_ATTRIBUTE_PREFIX_LEN) &&
strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
continue;
err = ksmbd_vfs_remove_xattr(user_ns, path->dentry, name);
if (err)
ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
}
out:
kvfree(xattr_list);
return err;
}
static int smb2_create_truncate(struct path *path)
{
int rc = vfs_truncate(path, 0);
if (rc) {
pr_err("vfs_truncate failed, rc %d\n", rc);
return rc;
}
rc = smb2_remove_smb_xattrs(path);
if (rc == -EOPNOTSUPP)
rc = 0;
if (rc)
ksmbd_debug(SMB,
"ksmbd_truncate_stream_name_xattr failed, rc %d\n",
rc);
return rc;
}
static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
struct ksmbd_file *fp)
{
struct xattr_dos_attrib da = {0};
int rc;
if (!test_share_config_flag(tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
return;
da.version = 4;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
da.itime = da.create_time = fp->create_time;
da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
XATTR_DOSINFO_ITIME;
rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
path->dentry, &da);
if (rc)
ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
}
static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
struct path *path, struct ksmbd_file *fp)
{
struct xattr_dos_attrib da;
int rc;
fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
/* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
if (!test_share_config_flag(tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
return;
rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
path->dentry, &da);
if (rc > 0) {
fp->f_ci->m_fattr = cpu_to_le32(da.attr);
fp->create_time = da.create_time;
fp->itime = da.itime;
}
}
static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
int open_flags, umode_t posix_mode, bool is_dir)
{
struct ksmbd_tree_connect *tcon = work->tcon;
struct ksmbd_share_config *share = tcon->share_conf;
umode_t mode;
int rc;
if (!(open_flags & O_CREAT))
return -EBADF;
ksmbd_debug(SMB, "file does not exist, so creating\n");
if (is_dir == true) {
ksmbd_debug(SMB, "creating directory\n");
mode = share_config_directory_mode(share, posix_mode);
rc = ksmbd_vfs_mkdir(work, name, mode);
if (rc)
return rc;
} else {
ksmbd_debug(SMB, "creating regular file\n");
mode = share_config_create_mode(share, posix_mode);
rc = ksmbd_vfs_create(work, name, mode);
if (rc)
return rc;
}
rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
if (rc) {
pr_err("cannot get linux path (%s), err = %d\n",
name, rc);
return rc;
}
return 0;
}
static int smb2_create_sd_buffer(struct ksmbd_work *work,
struct smb2_create_req *req,
struct path *path)
{
struct create_context *context;
struct create_sd_buf_req *sd_buf;
if (!req->CreateContextsOffset)
return -ENOENT;
/* Parse SD BUFFER create contexts */
context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
if (!context)
return -ENOENT;
else if (IS_ERR(context))
return PTR_ERR(context);
ksmbd_debug(SMB,
"Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
sd_buf = (struct create_sd_buf_req *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_sd_buf_req))
return -EINVAL;
return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
le32_to_cpu(sd_buf->ccontext.DataLength), true);
}
static void ksmbd_acls_fattr(struct smb_fattr *fattr,
struct user_namespace *mnt_userns,
struct inode *inode)
{
fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
fattr->cf_mode = inode->i_mode;
fattr->cf_acls = NULL;
fattr->cf_dacls = NULL;
if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
if (S_ISDIR(inode->i_mode))
fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
}
}
/**
* smb2_open() - handler for smb file open request
* @work: smb work containing request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_open(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct ksmbd_tree_connect *tcon = work->tcon;
struct smb2_create_req *req;
struct smb2_create_rsp *rsp;
struct path path;
struct ksmbd_share_config *share = tcon->share_conf;
struct ksmbd_file *fp = NULL;
struct file *filp = NULL;
struct user_namespace *user_ns = NULL;
struct kstat stat;
struct create_context *context;
struct lease_ctx_info *lc = NULL;
struct create_ea_buf_req *ea_buf = NULL;
struct oplock_info *opinfo;
__le32 *next_ptr = NULL;
int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
int rc = 0;
int contxt_cnt = 0, query_disk_id = 0;
int maximal_access_ctxt = 0, posix_ctxt = 0;
int s_type = 0;
int next_off = 0;
char *name = NULL;
char *stream_name = NULL;
bool file_present = false, created = false, already_permitted = false;
int share_ret, need_truncate = 0;
u64 time;
umode_t posix_mode = 0;
__le32 daccess, maximal_access = 0;
WORK_BUFFERS(work, req, rsp);
if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
(req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
ksmbd_debug(SMB, "invalid flag in chained command\n");
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
return -EINVAL;
}
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe create request\n");
return create_smb2_pipe(work);
}
if (req->NameLength) {
if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
*(char *)req->Buffer == '\\') {
pr_err("not allow directory name included leading slash\n");
rc = -EINVAL;
goto err_out1;
}
name = smb2_get_name(req->Buffer,
le16_to_cpu(req->NameLength),
work->conn->local_nls);
if (IS_ERR(name)) {
rc = PTR_ERR(name);
if (rc != -ENOMEM)
rc = -ENOENT;
name = NULL;
goto err_out1;
}
ksmbd_debug(SMB, "converted name = %s\n", name);
if (strchr(name, ':')) {
if (!test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_STREAMS)) {
rc = -EBADF;
goto err_out1;
}
rc = parse_stream_name(name, &stream_name, &s_type);
if (rc < 0)
goto err_out1;
}
rc = ksmbd_validate_filename(name);
if (rc < 0)
goto err_out1;
if (ksmbd_share_veto_filename(share, name)) {
rc = -ENOENT;
ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
name);
goto err_out1;
}
} else {
name = kstrdup("", GFP_KERNEL);
if (!name) {
rc = -ENOMEM;
goto err_out1;
}
}
req_op_level = req->RequestedOplockLevel;
if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
lc = parse_lease_state(req);
if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
pr_err("Invalid impersonationlevel : 0x%x\n",
le32_to_cpu(req->ImpersonationLevel));
rc = -EIO;
rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
goto err_out1;
}
if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
pr_err("Invalid create options : 0x%x\n",
le32_to_cpu(req->CreateOptions));
rc = -EINVAL;
goto err_out1;
} else {
if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
req->CreateOptions & FILE_RANDOM_ACCESS_LE)
req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
if (req->CreateOptions &
(FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
FILE_RESERVE_OPFILTER_LE)) {
rc = -EOPNOTSUPP;
goto err_out1;
}
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
rc = -EINVAL;
goto err_out1;
} else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
}
}
}
if (le32_to_cpu(req->CreateDisposition) >
le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
pr_err("Invalid create disposition : 0x%x\n",
le32_to_cpu(req->CreateDisposition));
rc = -EINVAL;
goto err_out1;
}
if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
pr_err("Invalid desired access : 0x%x\n",
le32_to_cpu(req->DesiredAccess));
rc = -EACCES;
goto err_out1;
}
if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
pr_err("Invalid file attribute : 0x%x\n",
le32_to_cpu(req->FileAttributes));
rc = -EINVAL;
goto err_out1;
}
if (req->CreateContextsOffset) {
/* Parse non-durable handle create contexts */
context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ea_buf = (struct create_ea_buf_req *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_ea_buf_req)) {
rc = -EINVAL;
goto err_out1;
}
if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
rsp->hdr.Status = STATUS_ACCESS_DENIED;
rc = -EACCES;
goto err_out1;
}
}
context = smb2_find_context_vals(req,
SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ksmbd_debug(SMB,
"get query maximal access context\n");
maximal_access_ctxt = 1;
}
context = smb2_find_context_vals(req,
SMB2_CREATE_TIMEWARP_REQUEST);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ksmbd_debug(SMB, "get timewarp context\n");
rc = -EBADF;
goto err_out1;
}
if (tcon->posix_extensions) {
context = smb2_find_context_vals(req,
SMB2_CREATE_TAG_POSIX);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
struct create_posix *posix =
(struct create_posix *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_posix) - 4) {
rc = -EINVAL;
goto err_out1;
}
ksmbd_debug(SMB, "get posix context\n");
posix_mode = le32_to_cpu(posix->Mode);
posix_ctxt = 1;
}
}
}
if (ksmbd_override_fsids(work)) {
rc = -ENOMEM;
goto err_out1;
}
rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
if (!rc) {
if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
/*
* If file exists with under flags, return access
* denied error.
*/
if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
req->CreateDisposition == FILE_OPEN_IF_LE) {
rc = -EACCES;
path_put(&path);
goto err_out;
}
if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
rc = -EACCES;
path_put(&path);
goto err_out;
}
} else if (d_is_symlink(path.dentry)) {
rc = -EACCES;
path_put(&path);
goto err_out;
}
}
if (rc) {
if (rc != -ENOENT)
goto err_out;
ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
name, rc);
rc = 0;
} else {
file_present = true;
user_ns = mnt_user_ns(path.mnt);
generic_fillattr(user_ns, d_inode(path.dentry), &stat);
}
if (stream_name) {
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
if (s_type == DATA_STREAM) {
rc = -EIO;
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
}
} else {
if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
rc = -EIO;
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
}
}
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
rc = -EIO;
}
if (rc < 0)
goto err_out;
}
if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
name, req->CreateOptions);
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
rc = -EIO;
goto err_out;
}
if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
!(req->CreateDisposition == FILE_CREATE_LE) &&
!S_ISDIR(stat.mode)) {
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
rc = -EIO;
goto err_out;
}
if (!stream_name && file_present &&
req->CreateDisposition == FILE_CREATE_LE) {
rc = -EEXIST;
goto err_out;
}
daccess = smb_map_generic_desired_access(req->DesiredAccess);
if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
rc = smb_check_perm_dacl(conn, &path, &daccess,
sess->user->uid);
if (rc)
goto err_out;
}
if (daccess & FILE_MAXIMAL_ACCESS_LE) {
if (!file_present) {
daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
} else {
rc = ksmbd_vfs_query_maximal_access(user_ns,
path.dentry,
&daccess);
if (rc)
goto err_out;
already_permitted = true;
}
maximal_access = daccess;
}
open_flags = smb2_create_open_flags(file_present, daccess,
req->CreateDisposition,
&may_flags);
if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
if (open_flags & O_CREAT) {
ksmbd_debug(SMB,
"User does not have write permission\n");
rc = -EACCES;
goto err_out;
}
}
/*create file if not present */
if (!file_present) {
rc = smb2_creat(work, &path, name, open_flags, posix_mode,
req->CreateOptions & FILE_DIRECTORY_FILE_LE);
if (rc) {
if (rc == -ENOENT) {
rc = -EIO;
rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
}
goto err_out;
}
created = true;
user_ns = mnt_user_ns(path.mnt);
if (ea_buf) {
if (le32_to_cpu(ea_buf->ccontext.DataLength) <
sizeof(struct smb2_ea_info)) {
rc = -EINVAL;
goto err_out;
}
rc = smb2_set_ea(&ea_buf->ea,
le32_to_cpu(ea_buf->ccontext.DataLength),
&path);
if (rc == -EOPNOTSUPP)
rc = 0;
else if (rc)
goto err_out;
}
} else if (!already_permitted) {
/* FILE_READ_ATTRIBUTE is allowed without inode_permission,
* because execute(search) permission on a parent directory,
* is already granted.
*/
if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
rc = inode_permission(user_ns,
d_inode(path.dentry),
may_flags);
if (rc)
goto err_out;
if ((daccess & FILE_DELETE_LE) ||
(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
rc = ksmbd_vfs_may_delete(user_ns,
path.dentry);
if (rc)
goto err_out;
}
}
}
rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
rc = -EBUSY;
goto err_out;
}
rc = 0;
filp = dentry_open(&path, open_flags, current_cred());
if (IS_ERR(filp)) {
rc = PTR_ERR(filp);
pr_err("dentry open for dir failed, rc %d\n", rc);
goto err_out;
}
if (file_present) {
if (!(open_flags & O_TRUNC))
file_info = FILE_OPENED;
else
file_info = FILE_OVERWRITTEN;
if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
FILE_SUPERSEDE_LE)
file_info = FILE_SUPERSEDED;
} else if (open_flags & O_CREAT) {
file_info = FILE_CREATED;
}
ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
/* Obtain Volatile-ID */
fp = ksmbd_open_fd(work, filp);
if (IS_ERR(fp)) {
fput(filp);
rc = PTR_ERR(fp);
fp = NULL;
goto err_out;
}
/* Get Persistent-ID */
ksmbd_open_durable_fd(fp);
if (!has_file_id(fp->persistent_id)) {
rc = -ENOMEM;
goto err_out;
}
fp->cdoption = req->CreateDisposition;
fp->daccess = daccess;
fp->saccess = req->ShareAccess;
fp->coption = req->CreateOptions;
/* Set default windows and posix acls if creating new file */
if (created) {
int posix_acl_rc;
struct inode *inode = d_inode(path.dentry);
posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
inode,
d_inode(path.dentry->d_parent));
if (posix_acl_rc)
ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR)) {
rc = smb_inherit_dacl(conn, &path, sess->user->uid,
sess->user->gid);
}
if (rc) {
rc = smb2_create_sd_buffer(work, req, &path);
if (rc) {
if (posix_acl_rc)
ksmbd_vfs_set_init_posix_acl(user_ns,
inode);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR)) {
struct smb_fattr fattr;
struct smb_ntsd *pntsd;
int pntsd_size, ace_num = 0;
ksmbd_acls_fattr(&fattr, user_ns, inode);
if (fattr.cf_acls)
ace_num = fattr.cf_acls->a_count;
if (fattr.cf_dacls)
ace_num += fattr.cf_dacls->a_count;
pntsd = kmalloc(sizeof(struct smb_ntsd) +
sizeof(struct smb_sid) * 3 +
sizeof(struct smb_acl) +
sizeof(struct smb_ace) * ace_num * 2,
GFP_KERNEL);
if (!pntsd)
goto err_out;
rc = build_sec_desc(user_ns,
pntsd, NULL,
OWNER_SECINFO |
GROUP_SECINFO |
DACL_SECINFO,
&pntsd_size, &fattr);
posix_acl_release(fattr.cf_acls);
posix_acl_release(fattr.cf_dacls);
if (rc) {
kfree(pntsd);
goto err_out;
}
rc = ksmbd_vfs_set_sd_xattr(conn,
user_ns,
path.dentry,
pntsd,
pntsd_size);
kfree(pntsd);
if (rc)
pr_err("failed to store ntacl in xattr : %d\n",
rc);
}
}
}
rc = 0;
}
if (stream_name) {
rc = smb2_set_stream_name_xattr(&path,
fp,
stream_name,
s_type);
if (rc)
goto err_out;
file_info = FILE_CREATED;
}
fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
!fp->attrib_only && !stream_name) {
smb_break_all_oplock(work, fp);
need_truncate = 1;
}
/* fp should be searchable through ksmbd_inode.m_fp_list
* after daccess, saccess, attrib_only, and stream are
* initialized.
*/
write_lock(&fp->f_ci->m_lock);
list_add(&fp->node, &fp->f_ci->m_fp_list);
write_unlock(&fp->f_ci->m_lock);
rc = ksmbd_vfs_getattr(&path, &stat);
if (rc) {
generic_fillattr(user_ns, d_inode(path.dentry), &stat);
rc = 0;
}
/* Check delete pending among previous fp before oplock break */
if (ksmbd_inode_pending_delete(fp)) {
rc = -EBUSY;
goto err_out;
}
share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
(req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
!(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
rc = share_ret;
goto err_out;
}
} else {
if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
req_op_level = smb2_map_lease_to_oplock(lc->req_state);
ksmbd_debug(SMB,
"lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
name, req_op_level, lc->req_state);
rc = find_same_lease_key(sess, fp->f_ci, lc);
if (rc)
goto err_out;
} else if (open_flags == O_RDONLY &&
(req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
req_op_level = SMB2_OPLOCK_LEVEL_II;
rc = smb_grant_oplock(work, req_op_level,
fp->persistent_id, fp,
le32_to_cpu(req->hdr.Id.SyncId.TreeId),
lc, share_ret);
if (rc < 0)
goto err_out;
}
if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
ksmbd_fd_set_delete_on_close(fp, file_info);
if (need_truncate) {
rc = smb2_create_truncate(&path);
if (rc)
goto err_out;
}
if (req->CreateContextsOffset) {
struct create_alloc_size_req *az_req;
az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
SMB2_CREATE_ALLOCATION_SIZE);
if (IS_ERR(az_req)) {
rc = PTR_ERR(az_req);
goto err_out;
} else if (az_req) {
loff_t alloc_size;
int err;
if (le16_to_cpu(az_req->ccontext.DataOffset) +
le32_to_cpu(az_req->ccontext.DataLength) <
sizeof(struct create_alloc_size_req)) {
rc = -EINVAL;
goto err_out;
}
alloc_size = le64_to_cpu(az_req->AllocationSize);
ksmbd_debug(SMB,
"request smb2 create allocate size : %llu\n",
alloc_size);
smb_break_all_levII_oplock(work, fp, 1);
err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
alloc_size);
if (err < 0)
ksmbd_debug(SMB,
"vfs_fallocate is failed : %d\n",
err);
}
context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out;
} else if (context) {
ksmbd_debug(SMB, "get query on disk id context\n");
query_disk_id = 1;
}
}
if (stat.result_mask & STATX_BTIME)
fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
else
fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
if (req->FileAttributes || fp->f_ci->m_fattr == 0)
fp->f_ci->m_fattr =
cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
if (!created)
smb2_update_xattrs(tcon, &path, fp);
else
smb2_new_xattrs(tcon, &path, fp);
memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
generic_fillattr(user_ns, file_inode(fp->filp),
&stat);
rsp->StructureSize = cpu_to_le16(89);
rcu_read_lock();
opinfo = rcu_dereference(fp->f_opinfo);
rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
rcu_read_unlock();
rsp->Flags = 0;
rsp->CreateAction = cpu_to_le32(file_info);
rsp->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
rsp->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
rsp->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
rsp->ChangeTime = cpu_to_le64(time);
rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
cpu_to_le64(stat.blocks << 9);
rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
rsp->FileAttributes = fp->f_ci->m_fattr;
rsp->Reserved2 = 0;
rsp->PersistentFileId = fp->persistent_id;
rsp->VolatileFileId = fp->volatile_id;
rsp->CreateContextsOffset = 0;
rsp->CreateContextsLength = 0;
inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
/* If lease is request send lease context response */
if (opinfo && opinfo->is_lease) {
struct create_context *lease_ccontext;
ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
name, opinfo->o_lease->state);
rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
lease_ccontext = (struct create_context *)rsp->Buffer;
contxt_cnt++;
create_lease_buf(rsp->Buffer, opinfo->o_lease);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_lease_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_lease_size);
next_ptr = &lease_ccontext->Next;
next_off = conn->vals->create_lease_size;
}
if (maximal_access_ctxt) {
struct create_context *mxac_ccontext;
if (maximal_access == 0)
ksmbd_vfs_query_maximal_access(user_ns,
path.dentry,
&maximal_access);
mxac_ccontext = (struct create_context *)(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength));
contxt_cnt++;
create_mxac_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
le32_to_cpu(maximal_access));
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_mxac_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_mxac_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
next_ptr = &mxac_ccontext->Next;
next_off = conn->vals->create_mxac_size;
}
if (query_disk_id) {
struct create_context *disk_id_ccontext;
disk_id_ccontext = (struct create_context *)(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength));
contxt_cnt++;
create_disk_id_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
stat.ino, tcon->id);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_disk_id_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_disk_id_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
next_ptr = &disk_id_ccontext->Next;
next_off = conn->vals->create_disk_id_size;
}
if (posix_ctxt) {
contxt_cnt++;
create_posix_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
fp);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_posix_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_posix_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
}
if (contxt_cnt > 0) {
rsp->CreateContextsOffset =
cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
}
err_out:
if (file_present || created)
path_put(&path);
ksmbd_revert_fsids(work);
err_out1:
if (rc) {
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
else if (rc == -EPERM)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (rc == -EBUSY)
rsp->hdr.Status = STATUS_DELETE_PENDING;
else if (rc == -EBADF)
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
else if (rc == -ENOEXEC)
rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
else if (rc == -ENXIO)
rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
else if (rc == -EEXIST)
rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
else if (rc == -EMFILE)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
if (!rsp->hdr.Status)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
if (fp)
ksmbd_fd_put(work, fp);
smb2_set_err_rsp(work);
ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
}
kfree(name);
kfree(lc);
return 0;
}
static int readdir_info_level_struct_sz(int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
return sizeof(struct file_full_directory_info);
case FILE_BOTH_DIRECTORY_INFORMATION:
return sizeof(struct file_both_directory_info);
case FILE_DIRECTORY_INFORMATION:
return sizeof(struct file_directory_info);
case FILE_NAMES_INFORMATION:
return sizeof(struct file_names_info);
case FILEID_FULL_DIRECTORY_INFORMATION:
return sizeof(struct file_id_full_dir_info);
case FILEID_BOTH_DIRECTORY_INFORMATION:
return sizeof(struct file_id_both_directory_info);
case SMB_FIND_FILE_POSIX_INFO:
return sizeof(struct smb2_posix_info);
default:
return -EOPNOTSUPP;
}
}
static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
d_info->name = ffdinfo->FileName;
d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
return 0;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
d_info->name = fbdinfo->FileName;
d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
return 0;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
d_info->name = fdinfo->FileName;
d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
return 0;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
d_info->name = fninfo->FileName;
d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
return 0;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
d_info->name = dinfo->FileName;
d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
return 0;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
d_info->name = fibdinfo->FileName;
d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
return 0;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
posix_info = (struct smb2_posix_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
d_info->name = posix_info->name;
d_info->name_len = le32_to_cpu(posix_info->name_len);
return 0;
}
default:
return -EINVAL;
}
}
/**
* smb2_populate_readdir_entry() - encode directory entry in smb2 response
* buffer
* @conn: connection instance
* @info_level: smb information level
* @d_info: structure included variables for query dir
* @ksmbd_kstat: ksmbd wrapper of dirent stat information
*
* if directory has many entries, find first can't read it fully.
* find next might be called multiple times to read remaining dir entries
*
* Return: 0 on success, otherwise error
*/
static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
struct ksmbd_dir_info *d_info,
struct ksmbd_kstat *ksmbd_kstat)
{
int next_entry_offset = 0;
char *conv_name;
int conv_len;
void *kstat;
int struct_sz, rc = 0;
conv_name = ksmbd_convert_dir_info_name(d_info,
conn->local_nls,
&conv_len);
if (!conv_name)
return -ENOMEM;
/* Somehow the name has only terminating NULL bytes */
if (conv_len < 0) {
rc = -EINVAL;
goto free_conv_name;
}
struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
d_info->last_entry_off_align = next_entry_offset - struct_sz;
if (next_entry_offset > d_info->out_buf_len) {
d_info->out_buf_len = 0;
rc = -ENOSPC;
goto free_conv_name;
}
kstat = d_info->wptr;
if (info_level != FILE_NAMES_INFORMATION)
kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)kstat;
ffdinfo->FileNameLength = cpu_to_le32(conv_len);
ffdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (ffdinfo->EaSize)
ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
if (d_info->hide_dot_file && d_info->name[0] == '.')
ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(ffdinfo->FileName, conv_name, conv_len);
ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)kstat;
fbdinfo->FileNameLength = cpu_to_le32(conv_len);
fbdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (fbdinfo->EaSize)
fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
fbdinfo->ShortNameLength = 0;
fbdinfo->Reserved = 0;
if (d_info->hide_dot_file && d_info->name[0] == '.')
fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fbdinfo->FileName, conv_name, conv_len);
fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)kstat;
fdinfo->FileNameLength = cpu_to_le32(conv_len);
if (d_info->hide_dot_file && d_info->name[0] == '.')
fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fdinfo->FileName, conv_name, conv_len);
fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)kstat;
fninfo->FileNameLength = cpu_to_le32(conv_len);
memcpy(fninfo->FileName, conv_name, conv_len);
fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)kstat;
dinfo->FileNameLength = cpu_to_le32(conv_len);
dinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (dinfo->EaSize)
dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
dinfo->Reserved = 0;
dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
if (d_info->hide_dot_file && d_info->name[0] == '.')
dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(dinfo->FileName, conv_name, conv_len);
dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)kstat;
fibdinfo->FileNameLength = cpu_to_le32(conv_len);
fibdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (fibdinfo->EaSize)
fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
fibdinfo->ShortNameLength = 0;
fibdinfo->Reserved = 0;
fibdinfo->Reserved2 = cpu_to_le16(0);
if (d_info->hide_dot_file && d_info->name[0] == '.')
fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fibdinfo->FileName, conv_name, conv_len);
fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
u64 time;
posix_info = (struct smb2_posix_info *)kstat;
posix_info->Ignored = 0;
posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
posix_info->ChangeTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
posix_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
posix_info->LastWriteTime = cpu_to_le64(time);
posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
posix_info->DosAttributes =
S_ISDIR(ksmbd_kstat->kstat->mode) ?
FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
if (d_info->hide_dot_file && d_info->name[0] == '.')
posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
memcpy(posix_info->name, conv_name, conv_len);
posix_info->name_len = cpu_to_le32(conv_len);
posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
} /* switch (info_level) */
d_info->last_entry_offset = d_info->data_count;
d_info->data_count += next_entry_offset;
d_info->out_buf_len -= next_entry_offset;
d_info->wptr += next_entry_offset;
ksmbd_debug(SMB,
"info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
info_level, d_info->out_buf_len,
next_entry_offset, d_info->data_count);
free_conv_name:
kfree(conv_name);
return rc;
}
struct smb2_query_dir_private {
struct ksmbd_work *work;
char *search_pattern;
struct ksmbd_file *dir_fp;
struct ksmbd_dir_info *d_info;
int info_level;
};
static void lock_dir(struct ksmbd_file *dir_fp)
{
struct dentry *dir = dir_fp->filp->f_path.dentry;
inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
}
static void unlock_dir(struct ksmbd_file *dir_fp)
{
struct dentry *dir = dir_fp->filp->f_path.dentry;
inode_unlock(d_inode(dir));
}
static int process_query_dir_entries(struct smb2_query_dir_private *priv)
{
struct user_namespace *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
struct kstat kstat;
struct ksmbd_kstat ksmbd_kstat;
int rc;
int i;
for (i = 0; i < priv->d_info->num_entry; i++) {
struct dentry *dent;
if (dentry_name(priv->d_info, priv->info_level))
return -EINVAL;
lock_dir(priv->dir_fp);
dent = lookup_one(user_ns, priv->d_info->name,
priv->dir_fp->filp->f_path.dentry,
priv->d_info->name_len);
unlock_dir(priv->dir_fp);
if (IS_ERR(dent)) {
ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
priv->d_info->name,
PTR_ERR(dent));
continue;
}
if (unlikely(d_is_negative(dent))) {
dput(dent);
ksmbd_debug(SMB, "Negative dentry `%s'\n",
priv->d_info->name);
continue;
}
ksmbd_kstat.kstat = &kstat;
if (priv->info_level != FILE_NAMES_INFORMATION)
ksmbd_vfs_fill_dentry_attrs(priv->work,
user_ns,
dent,
&ksmbd_kstat);
rc = smb2_populate_readdir_entry(priv->work->conn,
priv->info_level,
priv->d_info,
&ksmbd_kstat);
dput(dent);
if (rc)
return rc;
}
return 0;
}
static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
int info_level)
{
int struct_sz;
int conv_len;
int next_entry_offset;
struct_sz = readdir_info_level_struct_sz(info_level);
if (struct_sz == -EOPNOTSUPP)
return -EOPNOTSUPP;
conv_len = (d_info->name_len + 1) * 2;
next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
KSMBD_DIR_INFO_ALIGNMENT);
if (next_entry_offset > d_info->out_buf_len) {
d_info->out_buf_len = 0;
return -ENOSPC;
}
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)d_info->wptr;
memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
ffdinfo->FileName[d_info->name_len] = 0x00;
ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)d_info->wptr;
memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
fbdinfo->FileName[d_info->name_len] = 0x00;
fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)d_info->wptr;
memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
fdinfo->FileName[d_info->name_len] = 0x00;
fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)d_info->wptr;
memcpy(fninfo->FileName, d_info->name, d_info->name_len);
fninfo->FileName[d_info->name_len] = 0x00;
fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)d_info->wptr;
memcpy(dinfo->FileName, d_info->name, d_info->name_len);
dinfo->FileName[d_info->name_len] = 0x00;
dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
fibdinfo->FileName[d_info->name_len] = 0x00;
fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
posix_info = (struct smb2_posix_info *)d_info->wptr;
memcpy(posix_info->name, d_info->name, d_info->name_len);
posix_info->name[d_info->name_len] = 0x00;
posix_info->name_len = cpu_to_le32(d_info->name_len);
posix_info->NextEntryOffset =
cpu_to_le32(next_entry_offset);
break;
}
} /* switch (info_level) */
d_info->num_entry++;
d_info->out_buf_len -= next_entry_offset;
d_info->wptr += next_entry_offset;
return 0;
}
static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
loff_t offset, u64 ino, unsigned int d_type)
{
struct ksmbd_readdir_data *buf;
struct smb2_query_dir_private *priv;
struct ksmbd_dir_info *d_info;
int rc;
buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
priv = buf->private;
d_info = priv->d_info;
/* dot and dotdot entries are already reserved */
if (!strcmp(".", name) || !strcmp("..", name))
return 0;
if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
return 0;
if (!match_pattern(name, namlen, priv->search_pattern))
return 0;
d_info->name = name;
d_info->name_len = namlen;
rc = reserve_populate_dentry(d_info, priv->info_level);
if (rc)
return rc;
if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
d_info->out_buf_len = 0;
return 0;
}
return 0;
}
static void restart_ctx(struct dir_context *ctx)
{
ctx->pos = 0;
}
static int verify_info_level(int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
case FILE_BOTH_DIRECTORY_INFORMATION:
case FILE_DIRECTORY_INFORMATION:
case FILE_NAMES_INFORMATION:
case FILEID_FULL_DIRECTORY_INFORMATION:
case FILEID_BOTH_DIRECTORY_INFORMATION:
case SMB_FIND_FILE_POSIX_INFO:
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
unsigned short hdr2_len,
unsigned int out_buf_len)
{
int free_len;
if (out_buf_len > work->conn->vals->max_trans_size)
return -EINVAL;
free_len = (int)(work->response_sz -
(get_rfc1002_len(work->response_buf) + 4)) -
hdr2_len;
if (free_len < 0)
return -EINVAL;
return min_t(int, out_buf_len, free_len);
}
int smb2_query_dir(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_query_directory_req *req;
struct smb2_query_directory_rsp *rsp;
struct ksmbd_share_config *share = work->tcon->share_conf;
struct ksmbd_file *dir_fp = NULL;
struct ksmbd_dir_info d_info;
int rc = 0;
char *srch_ptr = NULL;
unsigned char srch_flag;
int buffer_sz;
struct smb2_query_dir_private query_dir_private = {NULL, };
WORK_BUFFERS(work, req, rsp);
if (ksmbd_override_fsids(work)) {
rsp->hdr.Status = STATUS_NO_MEMORY;
smb2_set_err_rsp(work);
return -ENOMEM;
}
rc = verify_info_level(req->FileInformationClass);
if (rc) {
rc = -EFAULT;
goto err_out2;
}
dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!dir_fp) {
rc = -EBADF;
goto err_out2;
}
if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
inode_permission(file_mnt_user_ns(dir_fp->filp),
file_inode(dir_fp->filp),
MAY_READ | MAY_EXEC)) {
pr_err("no right to enumerate directory (%pd)\n",
dir_fp->filp->f_path.dentry);
rc = -EACCES;
goto err_out2;
}
if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
pr_err("can't do query dir for a file\n");
rc = -EINVAL;
goto err_out2;
}
srch_flag = req->Flags;
srch_ptr = smb_strndup_from_utf16(req->Buffer,
le16_to_cpu(req->FileNameLength), 1,
conn->local_nls);
if (IS_ERR(srch_ptr)) {
ksmbd_debug(SMB, "Search Pattern not found\n");
rc = -EINVAL;
goto err_out2;
} else {
ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
}
if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
ksmbd_debug(SMB, "Restart directory scan\n");
generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
restart_ctx(&dir_fp->readdir_data.ctx);
}
memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
d_info.wptr = (char *)rsp->Buffer;
d_info.rptr = (char *)rsp->Buffer;
d_info.out_buf_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (d_info.out_buf_len < 0) {
rc = -EINVAL;
goto err_out;
}
d_info.flags = srch_flag;
/*
* reserve dot and dotdot entries in head of buffer
* in first response
*/
rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
dir_fp, &d_info, srch_ptr,
smb2_populate_readdir_entry);
if (rc == -ENOSPC)
rc = 0;
else if (rc)
goto err_out;
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
d_info.hide_dot_file = true;
buffer_sz = d_info.out_buf_len;
d_info.rptr = d_info.wptr;
query_dir_private.work = work;
query_dir_private.search_pattern = srch_ptr;
query_dir_private.dir_fp = dir_fp;
query_dir_private.d_info = &d_info;
query_dir_private.info_level = req->FileInformationClass;
dir_fp->readdir_data.private = &query_dir_private;
set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
/*
* req->OutputBufferLength is too small to contain even one entry.
* In this case, it immediately returns OutputBufferLength 0 to client.
*/
if (!d_info.out_buf_len && !d_info.num_entry)
goto no_buf_len;
if (rc == 0)
restart_ctx(&dir_fp->readdir_data.ctx);
if (rc == -ENOSPC)
rc = 0;
if (rc)
goto err_out;
d_info.wptr = d_info.rptr;
d_info.out_buf_len = buffer_sz;
rc = process_query_dir_entries(&query_dir_private);
if (rc)
goto err_out;
if (!d_info.data_count && d_info.out_buf_len >= 0) {
if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
rsp->hdr.Status = STATUS_NO_SUCH_FILE;
} else {
dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
rsp->hdr.Status = STATUS_NO_MORE_FILES;
}
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(0);
rsp->OutputBufferLength = cpu_to_le32(0);
rsp->Buffer[0] = 0;
inc_rfc1001_len(work->response_buf, 9);
} else {
no_buf_len:
((struct file_directory_info *)
((char *)rsp->Buffer + d_info.last_entry_offset))
->NextEntryOffset = 0;
if (d_info.data_count >= d_info.last_entry_off_align)
d_info.data_count -= d_info.last_entry_off_align;
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(72);
rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
}
kfree(srch_ptr);
ksmbd_fd_put(work, dir_fp);
ksmbd_revert_fsids(work);
return 0;
err_out:
pr_err("error while processing smb2 query dir rc = %d\n", rc);
kfree(srch_ptr);
err_out2:
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_NO_SUCH_FILE;
else if (rc == -EBADF)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (rc == -ENOMEM)
rsp->hdr.Status = STATUS_NO_MEMORY;
else if (rc == -EFAULT)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
if (!rsp->hdr.Status)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, dir_fp);
ksmbd_revert_fsids(work);
return 0;
}
/**
* buffer_check_err() - helper function to check buffer errors
* @reqOutputBufferLength: max buffer length expected in command response
* @rsp: query info response buffer contains output buffer length
* @rsp_org: base response buffer pointer in case of chained response
* @infoclass_size: query info class response buffer size
*
* Return: 0 on success, otherwise error
*/
static int buffer_check_err(int reqOutputBufferLength,
struct smb2_query_info_rsp *rsp,
void *rsp_org, int infoclass_size)
{
if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
if (reqOutputBufferLength < infoclass_size) {
pr_err("Invalid Buffer Size Requested\n");
rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
return -EINVAL;
}
ksmbd_debug(SMB, "Buffer Overflow\n");
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
reqOutputBufferLength);
rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
}
return 0;
}
static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
struct smb2_file_standard_info *sinfo;
sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
sinfo->AllocationSize = cpu_to_le64(4096);
sinfo->EndOfFile = cpu_to_le64(0);
sinfo->NumberOfLinks = cpu_to_le32(1);
sinfo->DeletePending = 1;
sinfo->Directory = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_standard_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
}
static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
void *rsp_org)
{
struct smb2_file_internal_info *file_info;
file_info = (struct smb2_file_internal_info *)rsp->Buffer;
/* any unique number */
file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_internal_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
}
static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
u64 id;
int rc;
/*
* Windows can sometime send query file info request on
* pipe without opening it, checking error condition here
*/
id = req->VolatileFileId;
if (!ksmbd_session_rpc_method(sess, id))
return -ENOENT;
ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
req->FileInfoClass, req->VolatileFileId);
switch (req->FileInfoClass) {
case FILE_STANDARD_INFORMATION:
get_standard_info_pipe(rsp, rsp_org);
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, rsp_org,
FILE_STANDARD_INFORMATION_SIZE);
break;
case FILE_INTERNAL_INFORMATION:
get_internal_info_pipe(rsp, id, rsp_org);
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, rsp_org,
FILE_INTERNAL_INFORMATION_SIZE);
break;
default:
ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
req->FileInfoClass);
rc = -EOPNOTSUPP;
}
return rc;
}
/**
* smb2_get_ea() - handler for smb2 get extended attribute command
* @work: smb work containing query info command buffer
* @fp: ksmbd_file pointer
* @req: get extended attribute request
* @rsp: response buffer pointer
* @rsp_org: base response buffer pointer in case of chained response
*
* Return: 0 on success, otherwise error
*/
static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp, void *rsp_org)
{
struct smb2_ea_info *eainfo, *prev_eainfo;
char *name, *ptr, *xattr_list = NULL, *buf;
int rc, name_len, value_len, xattr_list_len, idx;
ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
struct smb2_ea_info_req *ea_req = NULL;
struct path *path;
struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
if (!(fp->daccess & FILE_READ_EA_LE)) {
pr_err("Not permitted to read ext attr : 0x%x\n",
fp->daccess);
return -EACCES;
}
path = &fp->filp->f_path;
/* single EA entry is requested with given user.* name */
if (req->InputBufferLength) {
if (le32_to_cpu(req->InputBufferLength) <
sizeof(struct smb2_ea_info_req))
return -EINVAL;
ea_req = (struct smb2_ea_info_req *)req->Buffer;
} else {
/* need to send all EAs, if no specific EA is requested*/
if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
ksmbd_debug(SMB,
"All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
le32_to_cpu(req->Flags));
}
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
return -EINVAL;
rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (rc < 0) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
goto out;
} else if (!rc) { /* there is no EA in the file */
ksmbd_debug(SMB, "no ea data in the file\n");
goto done;
}
xattr_list_len = rc;
ptr = (char *)rsp->Buffer;
eainfo = (struct smb2_ea_info *)ptr;
prev_eainfo = eainfo;
idx = 0;
while (idx < xattr_list_len) {
name = xattr_list + idx;
name_len = strlen(name);
ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
idx += name_len + 1;
/*
* CIFS does not support EA other than user.* namespace,
* still keep the framework generic, to list other attrs
* in future.
*/
if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
continue;
if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
STREAM_PREFIX_LEN))
continue;
if (req->InputBufferLength &&
strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
ea_req->EaNameLength))
continue;
if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
continue;
if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
name_len -= XATTR_USER_PREFIX_LEN;
ptr = (char *)(&eainfo->name + name_len + 1);
buf_free_len -= (offsetof(struct smb2_ea_info, name) +
name_len + 1);
/* bailout if xattr can't fit in buf_free_len */
value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
name, &buf);
if (value_len <= 0) {
rc = -ENOENT;
rsp->hdr.Status = STATUS_INVALID_HANDLE;
goto out;
}
buf_free_len -= value_len;
if (buf_free_len < 0) {
kfree(buf);
break;
}
memcpy(ptr, buf, value_len);
kfree(buf);
ptr += value_len;
eainfo->Flags = 0;
eainfo->EaNameLength = name_len;
if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
name_len);
else
memcpy(eainfo->name, name, name_len);
eainfo->name[name_len] = '\0';
eainfo->EaValueLength = cpu_to_le16(value_len);
next_offset = offsetof(struct smb2_ea_info, name) +
name_len + 1 + value_len;
/* align next xattr entry at 4 byte bundary */
alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
if (alignment_bytes) {
memset(ptr, '\0', alignment_bytes);
ptr += alignment_bytes;
next_offset += alignment_bytes;
buf_free_len -= alignment_bytes;
}
eainfo->NextEntryOffset = cpu_to_le32(next_offset);
prev_eainfo = eainfo;
eainfo = (struct smb2_ea_info *)ptr;
rsp_data_cnt += next_offset;
if (req->InputBufferLength) {
ksmbd_debug(SMB, "single entry requested\n");
break;
}
}
/* no more ea entries */
prev_eainfo->NextEntryOffset = 0;
done:
rc = 0;
if (rsp_data_cnt == 0)
rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
inc_rfc1001_len(rsp_org, rsp_data_cnt);
out:
kvfree(xattr_list);
return rc;
}
static void get_file_access_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_access_info *file_info;
file_info = (struct smb2_file_access_info *)rsp->Buffer;
file_info->AccessFlags = fp->daccess;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_access_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
}
static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_basic_info *basic_info;
struct kstat stat;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
&stat);
basic_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
basic_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
basic_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
basic_info->ChangeTime = cpu_to_le64(time);
basic_info->Attributes = fp->f_ci->m_fattr;
basic_info->Pad1 = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_basic_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
return 0;
}
static unsigned long long get_allocation_size(struct inode *inode,
struct kstat *stat)
{
unsigned long long alloc_size = 0;
if (!S_ISDIR(stat->mode)) {
if ((inode->i_blocks << 9) <= stat->size)
alloc_size = stat->size;
else
alloc_size = inode->i_blocks << 9;
}
return alloc_size;
}
static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_standard_info *sinfo;
unsigned int delete_pending;
struct inode *inode;
struct kstat stat;
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
delete_pending = ksmbd_inode_pending_delete(fp);
sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
sinfo->DeletePending = delete_pending;
sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_standard_info));
inc_rfc1001_len(rsp_org,
sizeof(struct smb2_file_standard_info));
}
static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
struct smb2_file_alignment_info *file_info;
file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
file_info->AlignmentRequirement = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_alignment_info));
inc_rfc1001_len(rsp_org,
sizeof(struct smb2_file_alignment_info));
}
static int get_file_all_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_all_info *file_info;
unsigned int delete_pending;
struct inode *inode;
struct kstat stat;
int conv_len;
char *filename;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
if (IS_ERR(filename))
return PTR_ERR(filename);
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
ksmbd_debug(SMB, "filename = %s\n", filename);
delete_pending = ksmbd_inode_pending_delete(fp);
file_info = (struct smb2_file_all_info *)rsp->Buffer;
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->Attributes = fp->f_ci->m_fattr;
file_info->Pad1 = 0;
file_info->AllocationSize =
cpu_to_le64(get_allocation_size(inode, &stat));
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->NumberOfLinks =
cpu_to_le32(get_nlink(&stat) - delete_pending);
file_info->DeletePending = delete_pending;
file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
file_info->Pad2 = 0;
file_info->IndexNumber = cpu_to_le64(stat.ino);
file_info->EASize = 0;
file_info->AccessFlags = fp->daccess;
file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
file_info->Mode = fp->coption;
file_info->AlignmentRequirement = 0;
conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
PATH_MAX, conn->local_nls, 0);
conv_len *= 2;
file_info->FileNameLength = cpu_to_le32(conv_len);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
kfree(filename);
inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
return 0;
}
static void get_file_alternate_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_alt_name_info *file_info;
struct dentry *dentry = fp->filp->f_path.dentry;
int conv_len;
spin_lock(&dentry->d_lock);
file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
conv_len = ksmbd_extract_shortname(conn,
dentry->d_name.name,
file_info->FileName);
spin_unlock(&dentry->d_lock);
file_info->FileNameLength = cpu_to_le32(conv_len);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
}
static void get_file_stream_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_stream_info *file_info;
char *stream_name, *xattr_list = NULL, *stream_buf;
struct kstat stat;
struct path *path = &fp->filp->f_path;
ssize_t xattr_list_len;
int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
int buf_free_len;
struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_stream_info *)rsp->Buffer;
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
goto out;
xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (xattr_list_len < 0) {
goto out;
} else if (!xattr_list_len) {
ksmbd_debug(SMB, "empty xattr in the file\n");
goto out;
}
while (idx < xattr_list_len) {
stream_name = xattr_list + idx;
streamlen = strlen(stream_name);
idx += streamlen + 1;
ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
STREAM_PREFIX, STREAM_PREFIX_LEN))
continue;
stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
STREAM_PREFIX_LEN);
streamlen = stream_name_len;
/* plus : size */
streamlen += 1;
stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
if (!stream_buf)
break;
streamlen = snprintf(stream_buf, streamlen + 1,
":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
if (next > buf_free_len) {
kfree(stream_buf);
break;
}
file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
stream_buf, streamlen,
conn->local_nls, 0);
streamlen *= 2;
kfree(stream_buf);
file_info->StreamNameLength = cpu_to_le32(streamlen);
file_info->StreamSize = cpu_to_le64(stream_name_len);
file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
nbytes += next;
buf_free_len -= next;
file_info->NextEntryOffset = cpu_to_le32(next);
}
out:
if (!S_ISDIR(stat.mode) &&
buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
file_info = (struct smb2_file_stream_info *)
&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
"::$DATA", 7, conn->local_nls, 0);
streamlen *= 2;
file_info->StreamNameLength = cpu_to_le32(streamlen);
file_info->StreamSize = cpu_to_le64(stat.size);
file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
}
/* last entry offset should be 0 */
file_info->NextEntryOffset = 0;
kvfree(xattr_list);
rsp->OutputBufferLength = cpu_to_le32(nbytes);
inc_rfc1001_len(rsp_org, nbytes);
}
static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_internal_info *file_info;
struct kstat stat;
generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_internal_info *)rsp->Buffer;
file_info->IndexNumber = cpu_to_le64(stat.ino);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_internal_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
}
static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_ntwrk_info *file_info;
struct inode *inode;
struct kstat stat;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->Attributes = fp->f_ci->m_fattr;
file_info->AllocationSize =
cpu_to_le64(get_allocation_size(inode, &stat));
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->Reserved = cpu_to_le32(0);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
return 0;
}
static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
{
struct smb2_file_ea_info *file_info;
file_info = (struct smb2_file_ea_info *)rsp->Buffer;
file_info->EASize = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_ea_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
}
static void get_file_position_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_pos_info *file_info;
file_info = (struct smb2_file_pos_info *)rsp->Buffer;
file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_pos_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
}
static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_mode_info *file_info;
file_info = (struct smb2_file_mode_info *)rsp->Buffer;
file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_mode_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
}
static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_comp_info *file_info;
struct kstat stat;
generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_comp_info *)rsp->Buffer;
file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
file_info->CompressionUnitShift = 0;
file_info->ChunkShift = 0;
file_info->ClusterShift = 0;
memset(&file_info->Reserved[0], 0, 3);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_comp_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
}
static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_attr_tag_info *file_info;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
file_info->FileAttributes = fp->f_ci->m_fattr;
file_info->ReparseTag = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
return 0;
}
static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb311_posix_qinfo *file_info;
struct inode *inode = file_inode(fp->filp);
u64 time;
file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(inode->i_atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->DosAttributes = fp->f_ci->m_fattr;
file_info->Inode = cpu_to_le64(inode->i_ino);
file_info->EndOfFile = cpu_to_le64(inode->i_size);
file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
file_info->HardLinks = cpu_to_le32(inode->i_nlink);
file_info->Mode = cpu_to_le32(inode->i_mode);
file_info->DeviceId = cpu_to_le32(inode->i_rdev);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb311_posix_qinfo));
inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
return 0;
}
static int smb2_get_info_file(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_file *fp;
int fileinfoclass = 0;
int rc = 0;
int file_infoclass_size;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
/* smb2 info file called for pipe */
return smb2_get_info_file_pipe(work->sess, req, rsp,
work->response_buf);
}
if (work->next_smb2_rcv_hdr_off) {
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp)
return -ENOENT;
fileinfoclass = req->FileInfoClass;
switch (fileinfoclass) {
case FILE_ACCESS_INFORMATION:
get_file_access_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
break;
case FILE_BASIC_INFORMATION:
rc = get_file_basic_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
break;
case FILE_STANDARD_INFORMATION:
get_file_standard_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
break;
case FILE_ALIGNMENT_INFORMATION:
get_file_alignment_info(rsp, work->response_buf);
file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
break;
case FILE_ALL_INFORMATION:
rc = get_file_all_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
break;
case FILE_ALTERNATE_NAME_INFORMATION:
get_file_alternate_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
break;
case FILE_STREAM_INFORMATION:
get_file_stream_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
break;
case FILE_INTERNAL_INFORMATION:
get_file_internal_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
break;
case FILE_NETWORK_OPEN_INFORMATION:
rc = get_file_network_open_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
break;
case FILE_EA_INFORMATION:
get_file_ea_info(rsp, work->response_buf);
file_infoclass_size = FILE_EA_INFORMATION_SIZE;
break;
case FILE_FULL_EA_INFORMATION:
rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
break;
case FILE_POSITION_INFORMATION:
get_file_position_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
break;
case FILE_MODE_INFORMATION:
get_file_mode_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
break;
case FILE_COMPRESSION_INFORMATION:
get_file_compression_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
break;
case FILE_ATTRIBUTE_TAG_INFORMATION:
rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
break;
case SMB_FIND_FILE_POSIX_INFO:
if (!work->tcon->posix_extensions) {
pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
rc = -EOPNOTSUPP;
} else {
rc = find_file_posix_info(rsp, fp, work->response_buf);
file_infoclass_size = sizeof(struct smb311_posix_qinfo);
}
break;
default:
ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
fileinfoclass);
rc = -EOPNOTSUPP;
}
if (!rc)
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, work->response_buf,
file_infoclass_size);
ksmbd_fd_put(work, fp);
return rc;
}
static int smb2_get_info_filesystem(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_session *sess = work->sess;
struct ksmbd_conn *conn = sess->conn;
struct ksmbd_share_config *share = work->tcon->share_conf;
int fsinfoclass = 0;
struct kstatfs stfs;
struct path path;
int rc = 0, len;
int fs_infoclass_size = 0;
rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
if (rc) {
pr_err("cannot create vfs path\n");
return -EIO;
}
rc = vfs_statfs(&path, &stfs);
if (rc) {
pr_err("cannot do stat of path %s\n", share->path);
path_put(&path);
return -EIO;
}
fsinfoclass = req->FileInfoClass;
switch (fsinfoclass) {
case FS_DEVICE_INFORMATION:
{
struct filesystem_device_info *info;
info = (struct filesystem_device_info *)rsp->Buffer;
info->DeviceType = cpu_to_le32(stfs.f_type);
info->DeviceCharacteristics = cpu_to_le32(0x00000020);
rsp->OutputBufferLength = cpu_to_le32(8);
inc_rfc1001_len(work->response_buf, 8);
fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
break;
}
case FS_ATTRIBUTE_INFORMATION:
{
struct filesystem_attribute_info *info;
size_t sz;
info = (struct filesystem_attribute_info *)rsp->Buffer;
info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
FILE_PERSISTENT_ACLS |
FILE_UNICODE_ON_DISK |
FILE_CASE_PRESERVED_NAMES |
FILE_CASE_SENSITIVE_SEARCH |
FILE_SUPPORTS_BLOCK_REFCOUNTING);
info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
len = smbConvertToUTF16((__le16 *)info->FileSystemName,
"NTFS", PATH_MAX, conn->local_nls, 0);
len = len * 2;
info->FileSystemNameLen = cpu_to_le32(len);
sz = sizeof(struct filesystem_attribute_info) - 2 + len;
rsp->OutputBufferLength = cpu_to_le32(sz);
inc_rfc1001_len(work->response_buf, sz);
fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
break;
}
case FS_VOLUME_INFORMATION:
{
struct filesystem_vol_info *info;
size_t sz;
unsigned int serial_crc = 0;
info = (struct filesystem_vol_info *)(rsp->Buffer);
info->VolumeCreationTime = 0;
serial_crc = crc32_le(serial_crc, share->name,
strlen(share->name));
serial_crc = crc32_le(serial_crc, share->path,
strlen(share->path));
serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
strlen(ksmbd_netbios_name()));
/* Taking dummy value of serial number*/
info->SerialNumber = cpu_to_le32(serial_crc);
len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
share->name, PATH_MAX,
conn->local_nls, 0);
len = len * 2;
info->VolumeLabelSize = cpu_to_le32(len);
info->Reserved = 0;
sz = sizeof(struct filesystem_vol_info) - 2 + len;
rsp->OutputBufferLength = cpu_to_le32(sz);
inc_rfc1001_len(work->response_buf, sz);
fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
break;
}
case FS_SIZE_INFORMATION:
{
struct filesystem_info *info;
info = (struct filesystem_info *)(rsp->Buffer);
info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
info->SectorsPerAllocationUnit = cpu_to_le32(1);
info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
rsp->OutputBufferLength = cpu_to_le32(24);
inc_rfc1001_len(work->response_buf, 24);
fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
break;
}
case FS_FULL_SIZE_INFORMATION:
{
struct smb2_fs_full_size_info *info;
info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
info->CallerAvailableAllocationUnits =
cpu_to_le64(stfs.f_bavail);
info->ActualAvailableAllocationUnits =
cpu_to_le64(stfs.f_bfree);
info->SectorsPerAllocationUnit = cpu_to_le32(1);
info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
rsp->OutputBufferLength = cpu_to_le32(32);
inc_rfc1001_len(work->response_buf, 32);
fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
break;
}
case FS_OBJECT_ID_INFORMATION:
{
struct object_id_info *info;
info = (struct object_id_info *)(rsp->Buffer);
if (!user_guest(sess->user))
memcpy(info->objid, user_passkey(sess->user), 16);
else
memset(info->objid, 0, 16);
info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
info->extended_info.version = cpu_to_le32(1);
info->extended_info.release = cpu_to_le32(1);
info->extended_info.rel_date = 0;
memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
rsp->OutputBufferLength = cpu_to_le32(64);
inc_rfc1001_len(work->response_buf, 64);
fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
break;
}
case FS_SECTOR_SIZE_INFORMATION:
{
struct smb3_fs_ss_info *info;
unsigned int sector_size =
min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
info = (struct smb3_fs_ss_info *)(rsp->Buffer);
info->LogicalBytesPerSector = cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForAtomicity =
cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
info->FSEffPhysicalBytesPerSectorForAtomicity =
cpu_to_le32(sector_size);
info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
info->ByteOffsetForSectorAlignment = 0;
info->ByteOffsetForPartitionAlignment = 0;
rsp->OutputBufferLength = cpu_to_le32(28);
inc_rfc1001_len(work->response_buf, 28);
fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
break;
}
case FS_CONTROL_INFORMATION:
{
/*
* TODO : The current implementation is based on
* test result with win7(NTFS) server. It's need to
* modify this to get valid Quota values
* from Linux kernel
*/
struct smb2_fs_control_info *info;
info = (struct smb2_fs_control_info *)(rsp->Buffer);
info->FreeSpaceStartFiltering = 0;
info->FreeSpaceThreshold = 0;
info->FreeSpaceStopFiltering = 0;
info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
info->Padding = 0;
rsp->OutputBufferLength = cpu_to_le32(48);
inc_rfc1001_len(work->response_buf, 48);
fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
break;
}
case FS_POSIX_INFORMATION:
{
struct filesystem_posix_info *info;
if (!work->tcon->posix_extensions) {
pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
rc = -EOPNOTSUPP;
} else {
info = (struct filesystem_posix_info *)(rsp->Buffer);
info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
info->BlockSize = cpu_to_le32(stfs.f_bsize);
info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
info->TotalFileNodes = cpu_to_le64(stfs.f_files);
info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
rsp->OutputBufferLength = cpu_to_le32(56);
inc_rfc1001_len(work->response_buf, 56);
fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
}
break;
}
default:
path_put(&path);
return -EOPNOTSUPP;
}
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, work->response_buf,
fs_infoclass_size);
path_put(&path);
return rc;
}
static int smb2_get_info_sec(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_file *fp;
struct user_namespace *user_ns;
struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
struct smb_fattr fattr = {{0}};
struct inode *inode;
__u32 secdesclen;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
int addition_info = le32_to_cpu(req->AdditionalInformation);
int rc;
if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
PROTECTED_DACL_SECINFO |
UNPROTECTED_DACL_SECINFO)) {
ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
addition_info);
pntsd->revision = cpu_to_le16(1);
pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
pntsd->osidoffset = 0;
pntsd->gsidoffset = 0;
pntsd->sacloffset = 0;
pntsd->dacloffset = 0;
secdesclen = sizeof(struct smb_ntsd);
rsp->OutputBufferLength = cpu_to_le32(secdesclen);
inc_rfc1001_len(work->response_buf, secdesclen);
return 0;
}
if (work->next_smb2_rcv_hdr_off) {
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp)
return -ENOENT;
user_ns = file_mnt_user_ns(fp->filp);
inode = file_inode(fp->filp);
ksmbd_acls_fattr(&fattr, user_ns, inode);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR))
ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
fp->filp->f_path.dentry, &ppntsd);
rc = build_sec_desc(user_ns, pntsd, ppntsd, addition_info,
&secdesclen, &fattr);
posix_acl_release(fattr.cf_acls);
posix_acl_release(fattr.cf_dacls);
kfree(ppntsd);
ksmbd_fd_put(work, fp);
if (rc)
return rc;
rsp->OutputBufferLength = cpu_to_le32(secdesclen);
inc_rfc1001_len(work->response_buf, secdesclen);
return 0;
}
/**
* smb2_query_info() - handler for smb2 query info command
* @work: smb work containing query info request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_query_info(struct ksmbd_work *work)
{
struct smb2_query_info_req *req;
struct smb2_query_info_rsp *rsp;
int rc = 0;
WORK_BUFFERS(work, req, rsp);
ksmbd_debug(SMB, "GOT query info request\n");
switch (req->InfoType) {
case SMB2_O_INFO_FILE:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
rc = smb2_get_info_file(work, req, rsp);
break;
case SMB2_O_INFO_FILESYSTEM:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
rc = smb2_get_info_filesystem(work, req, rsp);
break;
case SMB2_O_INFO_SECURITY:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
rc = smb2_get_info_sec(work, req, rsp);
break;
default:
ksmbd_debug(SMB, "InfoType %d not supported yet\n",
req->InfoType);
rc = -EOPNOTSUPP;
}
if (rc < 0) {
if (rc == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (rc == -EIO)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
smb2_set_err_rsp(work);
ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
rc);
return rc;
}
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(72);
inc_rfc1001_len(work->response_buf, 8);
return 0;
}
/**
* smb2_close_pipe() - handler for closing IPC pipe
* @work: smb work containing close request buffer
*
* Return: 0
*/
static noinline int smb2_close_pipe(struct ksmbd_work *work)
{
u64 id;
struct smb2_close_req *req = smb2_get_msg(work->request_buf);
struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
id = req->VolatileFileId;
ksmbd_session_rpc_close(work->sess, id);
rsp->StructureSize = cpu_to_le16(60);
rsp->Flags = 0;
rsp->Reserved = 0;
rsp->CreationTime = 0;
rsp->LastAccessTime = 0;
rsp->LastWriteTime = 0;
rsp->ChangeTime = 0;
rsp->AllocationSize = 0;
rsp->EndOfFile = 0;
rsp->Attributes = 0;
inc_rfc1001_len(work->response_buf, 60);
return 0;
}
/**
* smb2_close() - handler for smb2 close file command
* @work: smb work containing close request buffer
*
* Return: 0
*/
int smb2_close(struct ksmbd_work *work)
{
u64 volatile_id = KSMBD_NO_FID;
u64 sess_id;
struct smb2_close_req *req;
struct smb2_close_rsp *rsp;
struct ksmbd_conn *conn = work->conn;
struct ksmbd_file *fp;
struct inode *inode;
u64 time;
int err = 0;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe close request\n");
return smb2_close_pipe(work);
}
sess_id = le64_to_cpu(req->hdr.SessionId);
if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
sess_id = work->compound_sid;
work->compound_sid = 0;
if (check_session_id(conn, sess_id)) {
work->compound_sid = sess_id;
} else {
rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
err = -EBADF;
goto out;
}
if (work->next_smb2_rcv_hdr_off &&
!has_file_id(req->VolatileFileId)) {
if (!has_file_id(work->compound_fid)) {
/* file already closed, return FILE_CLOSED */
ksmbd_debug(SMB, "file already closed\n");
rsp->hdr.Status = STATUS_FILE_CLOSED;
err = -EBADF;
goto out;
} else {
ksmbd_debug(SMB,
"Compound request set FID = %llu:%llu\n",
work->compound_fid,
work->compound_pfid);
volatile_id = work->compound_fid;
/* file closed, stored id is not valid anymore */
work->compound_fid = KSMBD_NO_FID;
work->compound_pfid = KSMBD_NO_FID;
}
} else {
volatile_id = req->VolatileFileId;
}
ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
rsp->StructureSize = cpu_to_le16(60);
rsp->Reserved = 0;
if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
fp = ksmbd_lookup_fd_fast(work, volatile_id);
if (!fp) {
err = -ENOENT;
goto out;
}
inode = file_inode(fp->filp);
rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
cpu_to_le64(inode->i_blocks << 9);
rsp->EndOfFile = cpu_to_le64(inode->i_size);
rsp->Attributes = fp->f_ci->m_fattr;
rsp->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(inode->i_atime);
rsp->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_mtime);
rsp->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_ctime);
rsp->ChangeTime = cpu_to_le64(time);
ksmbd_fd_put(work, fp);
} else {
rsp->Flags = 0;
rsp->AllocationSize = 0;
rsp->EndOfFile = 0;
rsp->Attributes = 0;
rsp->CreationTime = 0;
rsp->LastAccessTime = 0;
rsp->LastWriteTime = 0;
rsp->ChangeTime = 0;
}
err = ksmbd_close_fd(work, volatile_id);
out:
if (err) {
if (rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_FILE_CLOSED;
smb2_set_err_rsp(work);
} else {
inc_rfc1001_len(work->response_buf, 60);
}
return 0;
}
/**
* smb2_echo() - handler for smb2 echo(ping) command
* @work: smb work containing echo request buffer
*
* Return: 0
*/
int smb2_echo(struct ksmbd_work *work)
{
struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
rsp->StructureSize = cpu_to_le16(4);
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
return 0;
}
static int smb2_rename(struct ksmbd_work *work,
struct ksmbd_file *fp,
struct user_namespace *user_ns,
struct smb2_file_rename_info *file_info,
struct nls_table *local_nls)
{
struct ksmbd_share_config *share = fp->tcon->share_conf;
char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
char *pathname = NULL;
struct path path;
bool file_present = true;
int rc;
ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
pathname = kmalloc(PATH_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
if (IS_ERR(abs_oldname)) {
rc = -EINVAL;
goto out;
}
old_name = strrchr(abs_oldname, '/');
if (old_name && old_name[1] != '\0') {
old_name++;
} else {
ksmbd_debug(SMB, "can't get last component in path %s\n",
abs_oldname);
rc = -ENOENT;
goto out;
}
new_name = smb2_get_name(file_info->FileName,
le32_to_cpu(file_info->FileNameLength),
local_nls);
if (IS_ERR(new_name)) {
rc = PTR_ERR(new_name);
goto out;
}
if (strchr(new_name, ':')) {
int s_type;
char *xattr_stream_name, *stream_name = NULL;
size_t xattr_stream_size;
int len;
rc = parse_stream_name(new_name, &stream_name, &s_type);
if (rc < 0)
goto out;
len = strlen(new_name);
if (len > 0 && new_name[len - 1] != '/') {
pr_err("not allow base filename in rename\n");
rc = -ESHARE;
goto out;
}
rc = ksmbd_vfs_xattr_stream_name(stream_name,
&xattr_stream_name,
&xattr_stream_size,
s_type);
if (rc)
goto out;
rc = ksmbd_vfs_setxattr(user_ns,
fp->filp->f_path.dentry,
xattr_stream_name,
NULL, 0, 0);
if (rc < 0) {
pr_err("failed to store stream name in xattr: %d\n",
rc);
rc = -EINVAL;
goto out;
}
goto out;
}
ksmbd_debug(SMB, "new name %s\n", new_name);
rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
if (rc) {
if (rc != -ENOENT)
goto out;
file_present = false;
} else {
path_put(&path);
}
if (ksmbd_share_veto_filename(share, new_name)) {
rc = -ENOENT;
ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
goto out;
}
if (file_info->ReplaceIfExists) {
if (file_present) {
rc = ksmbd_vfs_remove_file(work, new_name);
if (rc) {
if (rc != -ENOTEMPTY)
rc = -EINVAL;
ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
new_name, rc);
goto out;
}
}
} else {
if (file_present &&
strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
rc = -EEXIST;
ksmbd_debug(SMB,
"cannot rename already existing file\n");
goto out;
}
}
rc = ksmbd_vfs_fp_rename(work, fp, new_name);
out:
kfree(pathname);
if (!IS_ERR(new_name))
kfree(new_name);
return rc;
}
static int smb2_create_link(struct ksmbd_work *work,
struct ksmbd_share_config *share,
struct smb2_file_link_info *file_info,
unsigned int buf_len, struct file *filp,
struct nls_table *local_nls)
{
char *link_name = NULL, *target_name = NULL, *pathname = NULL;
struct path path;
bool file_present = true;
int rc;
if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
le32_to_cpu(file_info->FileNameLength))
return -EINVAL;
ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
pathname = kmalloc(PATH_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
link_name = smb2_get_name(file_info->FileName,
le32_to_cpu(file_info->FileNameLength),
local_nls);
if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
rc = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "link name is %s\n", link_name);
target_name = d_path(&filp->f_path, pathname, PATH_MAX);
if (IS_ERR(target_name)) {
rc = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "target name is %s\n", target_name);
rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
if (rc) {
if (rc != -ENOENT)
goto out;
file_present = false;
} else {
path_put(&path);
}
if (file_info->ReplaceIfExists) {
if (file_present) {
rc = ksmbd_vfs_remove_file(work, link_name);
if (rc) {
rc = -EINVAL;
ksmbd_debug(SMB, "cannot delete %s\n",
link_name);
goto out;
}
}
} else {
if (file_present) {
rc = -EEXIST;
ksmbd_debug(SMB, "link already exists\n");
goto out;
}
}
rc = ksmbd_vfs_link(work, target_name, link_name);
if (rc)
rc = -EINVAL;
out:
if (!IS_ERR(link_name))
kfree(link_name);
kfree(pathname);
return rc;
}
static int set_file_basic_info(struct ksmbd_file *fp,
struct smb2_file_basic_info *file_info,
struct ksmbd_share_config *share)
{
struct iattr attrs;
struct file *filp;
struct inode *inode;
struct user_namespace *user_ns;
int rc = 0;
if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
return -EACCES;
attrs.ia_valid = 0;
filp = fp->filp;
inode = file_inode(filp);
user_ns = file_mnt_user_ns(filp);
if (file_info->CreationTime)
fp->create_time = le64_to_cpu(file_info->CreationTime);
if (file_info->LastAccessTime) {
attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
}
attrs.ia_valid |= ATTR_CTIME;
if (file_info->ChangeTime)
attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
else
attrs.ia_ctime = inode->i_ctime;
if (file_info->LastWriteTime) {
attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
}
if (file_info->Attributes) {
if (!S_ISDIR(inode->i_mode) &&
file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
pr_err("can't change a file to a directory\n");
return -EINVAL;
}
if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
fp->f_ci->m_fattr = file_info->Attributes |
(fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
}
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
(file_info->CreationTime || file_info->Attributes)) {
struct xattr_dos_attrib da = {0};
da.version = 4;
da.itime = fp->itime;
da.create_time = fp->create_time;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
XATTR_DOSINFO_ITIME;
rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
filp->f_path.dentry, &da);
if (rc)
ksmbd_debug(SMB,
"failed to restore file attribute in EA\n");
rc = 0;
}
if (attrs.ia_valid) {
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = d_inode(dentry);
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return -EACCES;
inode_lock(inode);
inode->i_ctime = attrs.ia_ctime;
attrs.ia_valid &= ~ATTR_CTIME;
rc = notify_change(user_ns, dentry, &attrs, NULL);
inode_unlock(inode);
}
return rc;
}
static int set_file_allocation_info(struct ksmbd_work *work,
struct ksmbd_file *fp,
struct smb2_file_alloc_info *file_alloc_info)
{
/*
* TODO : It's working fine only when store dos attributes
* is not yes. need to implement a logic which works
* properly with any smb.conf option
*/
loff_t alloc_blks;
struct inode *inode;
int rc;
if (!(fp->daccess & FILE_WRITE_DATA_LE))
return -EACCES;
alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
inode = file_inode(fp->filp);
if (alloc_blks > inode->i_blocks) {
smb_break_all_levII_oplock(work, fp, 1);
rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
alloc_blks * 512);
if (rc && rc != -EOPNOTSUPP) {
pr_err("vfs_fallocate is failed : %d\n", rc);
return rc;
}
} else if (alloc_blks < inode->i_blocks) {
loff_t size;
/*
* Allocation size could be smaller than original one
* which means allocated blocks in file should be
* deallocated. use truncate to cut out it, but inode
* size is also updated with truncate offset.
* inode size is retained by backup inode size.
*/
size = i_size_read(inode);
rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
if (rc) {
pr_err("truncate failed!, err %d\n", rc);
return rc;
}
if (size < alloc_blks * 512)
i_size_write(inode, size);
}
return 0;
}
static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_file_eof_info *file_eof_info)
{
loff_t newsize;
struct inode *inode;
int rc;
if (!(fp->daccess & FILE_WRITE_DATA_LE))
return -EACCES;
newsize = le64_to_cpu(file_eof_info->EndOfFile);
inode = file_inode(fp->filp);
/*
* If FILE_END_OF_FILE_INFORMATION of set_info_file is called
* on FAT32 shared device, truncate execution time is too long
* and network error could cause from windows client. because
* truncate of some filesystem like FAT32 fill zero data in
* truncated range.
*/
if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
rc = ksmbd_vfs_truncate(work, fp, newsize);
if (rc) {
ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
if (rc != -EAGAIN)
rc = -EBADF;
return rc;
}
}
return 0;
}
static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_file_rename_info *rename_info,
unsigned int buf_len)
{
struct user_namespace *user_ns;
struct ksmbd_file *parent_fp;
struct dentry *parent;
struct dentry *dentry = fp->filp->f_path.dentry;
int ret;
if (!(fp->daccess & FILE_DELETE_LE)) {
pr_err("no right to delete : 0x%x\n", fp->daccess);
return -EACCES;
}
if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
le32_to_cpu(rename_info->FileNameLength))
return -EINVAL;
user_ns = file_mnt_user_ns(fp->filp);
if (ksmbd_stream_fd(fp))
goto next;
parent = dget_parent(dentry);
ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
if (ret) {
dput(parent);
return ret;
}
parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
inode_unlock(d_inode(parent));
dput(parent);
if (parent_fp) {
if (parent_fp->daccess & FILE_DELETE_LE) {
pr_err("parent dir is opened with delete access\n");
ksmbd_fd_put(work, parent_fp);
return -ESHARE;
}
ksmbd_fd_put(work, parent_fp);
}
next:
return smb2_rename(work, fp, user_ns, rename_info,
work->sess->conn->local_nls);
}
static int set_file_disposition_info(struct ksmbd_file *fp,
struct smb2_file_disposition_info *file_info)
{
struct inode *inode;
if (!(fp->daccess & FILE_DELETE_LE)) {
pr_err("no right to delete : 0x%x\n", fp->daccess);
return -EACCES;
}
inode = file_inode(fp->filp);
if (file_info->DeletePending) {
if (S_ISDIR(inode->i_mode) &&
ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
return -EBUSY;
ksmbd_set_inode_pending_delete(fp);
} else {
ksmbd_clear_inode_pending_delete(fp);
}
return 0;
}
static int set_file_position_info(struct ksmbd_file *fp,
struct smb2_file_pos_info *file_info)
{
loff_t current_byte_offset;
unsigned long sector_size;
struct inode *inode;
inode = file_inode(fp->filp);
current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
sector_size = inode->i_sb->s_blocksize;
if (current_byte_offset < 0 ||
(fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
current_byte_offset & (sector_size - 1))) {
pr_err("CurrentByteOffset is not valid : %llu\n",
current_byte_offset);
return -EINVAL;
}
fp->filp->f_pos = current_byte_offset;
return 0;
}
static int set_file_mode_info(struct ksmbd_file *fp,
struct smb2_file_mode_info *file_info)
{
__le32 mode;
mode = file_info->Mode;
if ((mode & ~FILE_MODE_INFO_MASK)) {
pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
return -EINVAL;
}
/*
* TODO : need to implement consideration for
* FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
*/
ksmbd_vfs_set_fadvise(fp->filp, mode);
fp->coption = mode;
return 0;
}
/**
* smb2_set_info_file() - handler for smb2 set info command
* @work: smb work containing set info command buffer
* @fp: ksmbd_file pointer
* @req: request buffer pointer
* @share: ksmbd_share_config pointer
*
* Return: 0 on success, otherwise error
* TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
*/
static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_set_info_req *req,
struct ksmbd_share_config *share)
{
unsigned int buf_len = le32_to_cpu(req->BufferLength);
switch (req->FileInfoClass) {
case FILE_BASIC_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_basic_info))
return -EINVAL;
return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
}
case FILE_ALLOCATION_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_alloc_info))
return -EINVAL;
return set_file_allocation_info(work, fp,
(struct smb2_file_alloc_info *)req->Buffer);
}
case FILE_END_OF_FILE_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_eof_info))
return -EINVAL;
return set_end_of_file_info(work, fp,
(struct smb2_file_eof_info *)req->Buffer);
}
case FILE_RENAME_INFORMATION:
{
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
return -EACCES;
}
if (buf_len < sizeof(struct smb2_file_rename_info))
return -EINVAL;
return set_rename_info(work, fp,
(struct smb2_file_rename_info *)req->Buffer,
buf_len);
}
case FILE_LINK_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_link_info))
return -EINVAL;
return smb2_create_link(work, work->tcon->share_conf,
(struct smb2_file_link_info *)req->Buffer,
buf_len, fp->filp,
work->sess->conn->local_nls);
}
case FILE_DISPOSITION_INFORMATION:
{
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
return -EACCES;
}
if (buf_len < sizeof(struct smb2_file_disposition_info))
return -EINVAL;
return set_file_disposition_info(fp,
(struct smb2_file_disposition_info *)req->Buffer);
}
case FILE_FULL_EA_INFORMATION:
{
if (!(fp->daccess & FILE_WRITE_EA_LE)) {
pr_err("Not permitted to write ext attr: 0x%x\n",
fp->daccess);
return -EACCES;
}
if (buf_len < sizeof(struct smb2_ea_info))
return -EINVAL;
return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
buf_len, &fp->filp->f_path);
}
case FILE_POSITION_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_pos_info))
return -EINVAL;
return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
}
case FILE_MODE_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_mode_info))
return -EINVAL;
return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
}
}
pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
return -EOPNOTSUPP;
}
static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
char *buffer, int buf_len)
{
struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
fp->saccess |= FILE_SHARE_DELETE_LE;
return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
buf_len, false);
}
/**
* smb2_set_info() - handler for smb2 set info command handler
* @work: smb work containing set info request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_set_info(struct ksmbd_work *work)
{
struct smb2_set_info_req *req;
struct smb2_set_info_rsp *rsp;
struct ksmbd_file *fp;
int rc = 0;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
ksmbd_debug(SMB, "Received set info request\n");
if (work->next_smb2_rcv_hdr_off) {
req = ksmbd_req_buf_next(work);
rsp = ksmbd_resp_buf_next(work);
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
} else {
req = smb2_get_msg(work->request_buf);
rsp = smb2_get_msg(work->response_buf);
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp) {
ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
rc = -ENOENT;
goto err_out;
}
switch (req->InfoType) {
case SMB2_O_INFO_FILE:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
break;
case SMB2_O_INFO_SECURITY:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
if (ksmbd_override_fsids(work)) {
rc = -ENOMEM;
goto err_out;
}
rc = smb2_set_info_sec(fp,
le32_to_cpu(req->AdditionalInformation),
req->Buffer,
le32_to_cpu(req->BufferLength));
ksmbd_revert_fsids(work);
break;
default:
rc = -EOPNOTSUPP;
}
if (rc < 0)
goto err_out;
rsp->StructureSize = cpu_to_le16(2);
inc_rfc1001_len(work->response_buf, 2);
ksmbd_fd_put(work, fp);
return 0;
err_out:
if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
else if (rc == -EBUSY || rc == -ENOTEMPTY)
rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
else if (rc == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (rc == -EBADF || rc == -ESTALE)
rsp->hdr.Status = STATUS_INVALID_HANDLE;
else if (rc == -EEXIST)
rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
return rc;
}
/**
* smb2_read_pipe() - handler for smb2 read from IPC pipe
* @work: smb work containing read IPC pipe command buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int smb2_read_pipe(struct ksmbd_work *work)
{
int nbytes = 0, err;
u64 id;
struct ksmbd_rpc_command *rpc_resp;
struct smb2_read_req *req = smb2_get_msg(work->request_buf);
struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
id = req->VolatileFileId;
inc_rfc1001_len(work->response_buf, 16);
rpc_resp = ksmbd_rpc_read(work->sess, id);
if (rpc_resp) {
if (rpc_resp->flags != KSMBD_RPC_OK) {
err = -EINVAL;
goto out;
}
work->aux_payload_buf =
kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
if (!work->aux_payload_buf) {
err = -ENOMEM;
goto out;
}
memcpy(work->aux_payload_buf, rpc_resp->payload,
rpc_resp->payload_sz);
nbytes = rpc_resp->payload_sz;
work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
work->aux_payload_sz = nbytes;
kvfree(rpc_resp);
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 80;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = 0;
rsp->Flags = 0;
inc_rfc1001_len(work->response_buf, nbytes);
return 0;
out:
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
smb2_set_err_rsp(work);
kvfree(rpc_resp);
return err;
}
static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
struct smb2_buffer_desc_v1 *desc,
__le32 Channel,
__le16 ChannelInfoLength)
{
unsigned int i, ch_count;
if (work->conn->dialect == SMB30_PROT_ID &&
Channel != SMB2_CHANNEL_RDMA_V1)
return -EINVAL;
ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
for (i = 0; i < ch_count; i++) {
pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
i,
le32_to_cpu(desc[i].token),
le32_to_cpu(desc[i].length));
}
}
if (!ch_count)
return -EINVAL;
work->need_invalidate_rkey =
(Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
work->remote_key = le32_to_cpu(desc->token);
return 0;
}
static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
struct smb2_read_req *req, void *data_buf,
size_t length)
{
int err;
err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
(struct smb2_buffer_desc_v1 *)
((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
le16_to_cpu(req->ReadChannelInfoLength));
if (err)
return err;
return length;
}
/**
* smb2_read() - handler for smb2 read from file
* @work: smb work containing read command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_read(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_read_req *req;
struct smb2_read_rsp *rsp;
struct ksmbd_file *fp = NULL;
loff_t offset;
size_t length, mincount;
ssize_t nbytes = 0, remain_bytes = 0;
int err = 0;
bool is_rdma_channel = false;
unsigned int max_read_size = conn->vals->max_read_size;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe read request\n");
return smb2_read_pipe(work);
}
if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
req->Channel == SMB2_CHANNEL_RDMA_V1) {
is_rdma_channel = true;
max_read_size = get_smbd_max_read_write_size();
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
err = -EINVAL;
goto out;
}
err = smb2_set_remote_key_for_rdma(work,
(struct smb2_buffer_desc_v1 *)
((char *)req + ch_offset),
req->Channel,
req->ReadChannelInfoLength);
if (err)
goto out;
}
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
err = -ENOENT;
goto out;
}
if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
pr_err("Not permitted to read : 0x%x\n", fp->daccess);
err = -EACCES;
goto out;
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
mincount = le32_to_cpu(req->MinimumCount);
if (length > max_read_size) {
ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
max_read_size);
err = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
fp->filp->f_path.dentry, offset, length);
work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!work->aux_payload_buf) {
err = -ENOMEM;
goto out;
}
nbytes = ksmbd_vfs_read(work, fp, length, &offset);
if (nbytes < 0) {
err = nbytes;
goto out;
}
if ((nbytes == 0 && length != 0) || nbytes < mincount) {
kvfree(work->aux_payload_buf);
work->aux_payload_buf = NULL;
rsp->hdr.Status = STATUS_END_OF_FILE;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return 0;
}
ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
nbytes, offset, mincount);
if (is_rdma_channel == true) {
/* write data to the client using rdma channel */
remain_bytes = smb2_read_rdma_channel(work, req,
work->aux_payload_buf,
nbytes);
kvfree(work->aux_payload_buf);
work->aux_payload_buf = NULL;
nbytes = 0;
if (remain_bytes < 0) {
err = (int)remain_bytes;
goto out;
}
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 80;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = cpu_to_le32(remain_bytes);
rsp->Flags = 0;
inc_rfc1001_len(work->response_buf, 16);
work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
work->aux_payload_sz = nbytes;
inc_rfc1001_len(work->response_buf, nbytes);
ksmbd_fd_put(work, fp);
return 0;
out:
if (err) {
if (err == -EISDIR)
rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
else if (err == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (err == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (err == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
ksmbd_fd_put(work, fp);
return err;
}
/**
* smb2_write_pipe() - handler for smb2 write on IPC pipe
* @work: smb work containing write IPC pipe command buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int smb2_write_pipe(struct ksmbd_work *work)
{
struct smb2_write_req *req = smb2_get_msg(work->request_buf);
struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_rpc_command *rpc_resp;
u64 id = 0;
int err = 0, ret = 0;
char *data_buf;
size_t length;
length = le32_to_cpu(req->Length);
id = req->VolatileFileId;
if ((u64)le16_to_cpu(req->DataOffset) + length >
get_rfc1002_len(work->request_buf)) {
pr_err("invalid write data offset %u, smb_len %u\n",
le16_to_cpu(req->DataOffset),
get_rfc1002_len(work->request_buf));
err = -EINVAL;
goto out;
}
data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
le16_to_cpu(req->DataOffset));
rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
if (rpc_resp) {
if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
kvfree(rpc_resp);
smb2_set_err_rsp(work);
return -EOPNOTSUPP;
}
if (rpc_resp->flags != KSMBD_RPC_OK) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
kvfree(rpc_resp);
return ret;
}
kvfree(rpc_resp);
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 0;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(length);
rsp->DataRemaining = 0;
rsp->Reserved2 = 0;
inc_rfc1001_len(work->response_buf, 16);
return 0;
out:
if (err) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
return err;
}
static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
struct smb2_write_req *req,
struct ksmbd_file *fp,
loff_t offset, size_t length, bool sync)
{
char *data_buf;
int ret;
ssize_t nbytes;
data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!data_buf)
return -ENOMEM;
ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
(struct smb2_buffer_desc_v1 *)
((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
le16_to_cpu(req->WriteChannelInfoLength));
if (ret < 0) {
kvfree(data_buf);
return ret;
}
ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
kvfree(data_buf);
if (ret < 0)
return ret;
return nbytes;
}
/**
* smb2_write() - handler for smb2 write from file
* @work: smb work containing write command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_write(struct ksmbd_work *work)
{
struct smb2_write_req *req;
struct smb2_write_rsp *rsp;
struct ksmbd_file *fp = NULL;
loff_t offset;
size_t length;
ssize_t nbytes;
char *data_buf;
bool writethrough = false, is_rdma_channel = false;
int err = 0;
unsigned int max_write_size = work->conn->vals->max_write_size;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe write request\n");
return smb2_write_pipe(work);
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
is_rdma_channel = true;
max_write_size = get_smbd_max_read_write_size();
length = le32_to_cpu(req->RemainingBytes);
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
if (req->Length != 0 || req->DataOffset != 0 ||
ch_offset < offsetof(struct smb2_write_req, Buffer)) {
err = -EINVAL;
goto out;
}
err = smb2_set_remote_key_for_rdma(work,
(struct smb2_buffer_desc_v1 *)
((char *)req + ch_offset),
req->Channel,
req->WriteChannelInfoLength);
if (err)
goto out;
}
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB, "User does not have write permission\n");
err = -EACCES;
goto out;
}
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
err = -ENOENT;
goto out;
}
if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
pr_err("Not permitted to write : 0x%x\n", fp->daccess);
err = -EACCES;
goto out;
}
if (length > max_write_size) {
ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
max_write_size);
err = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
writethrough = true;
if (is_rdma_channel == false) {
if ((u64)le16_to_cpu(req->DataOffset) + length >
get_rfc1002_len(work->request_buf)) {
pr_err("invalid write data offset %u, smb_len %u\n",
le16_to_cpu(req->DataOffset),
get_rfc1002_len(work->request_buf));
err = -EINVAL;
goto out;
}
data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
le16_to_cpu(req->DataOffset));
ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
fp->filp->f_path.dentry, offset, length);
err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
writethrough, &nbytes);
if (err < 0)
goto out;
} else {
/* read data from the client using rdma channel, and
* write the data.
*/
nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
writethrough);
if (nbytes < 0) {
err = (int)nbytes;
goto out;
}
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 0;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = 0;
rsp->Reserved2 = 0;
inc_rfc1001_len(work->response_buf, 16);
ksmbd_fd_put(work, fp);
return 0;
out:
if (err == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (err == -ENOSPC || err == -EFBIG)
rsp->hdr.Status = STATUS_DISK_FULL;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (err == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (err == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return err;
}
/**
* smb2_flush() - handler for smb2 flush file - fsync
* @work: smb work containing flush command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_flush(struct ksmbd_work *work)
{
struct smb2_flush_req *req;
struct smb2_flush_rsp *rsp;
int err;
WORK_BUFFERS(work, req, rsp);
ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
if (err)
goto out;
rsp->StructureSize = cpu_to_le16(4);
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
return 0;
out:
if (err) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
return err;
}
/**
* smb2_cancel() - handler for smb2 cancel command
* @work: smb work containing cancel command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_cancel(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
struct smb2_hdr *chdr;
struct ksmbd_work *cancel_work = NULL, *iter;
struct list_head *command_list;
ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
hdr->MessageId, hdr->Flags);
if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
command_list = &conn->async_requests;
spin_lock(&conn->request_lock);
list_for_each_entry(iter, command_list,
async_request_entry) {
chdr = smb2_get_msg(iter->request_buf);
if (iter->async_id !=
le64_to_cpu(hdr->Id.AsyncId))
continue;
ksmbd_debug(SMB,
"smb2 with AsyncId %llu cancelled command = 0x%x\n",
le64_to_cpu(hdr->Id.AsyncId),
le16_to_cpu(chdr->Command));
cancel_work = iter;
break;
}
spin_unlock(&conn->request_lock);
} else {
command_list = &conn->requests;
spin_lock(&conn->request_lock);
list_for_each_entry(iter, command_list, request_entry) {
chdr = smb2_get_msg(iter->request_buf);
if (chdr->MessageId != hdr->MessageId ||
iter == work)
continue;
ksmbd_debug(SMB,
"smb2 with mid %llu cancelled command = 0x%x\n",
le64_to_cpu(hdr->MessageId),
le16_to_cpu(chdr->Command));
cancel_work = iter;
break;
}
spin_unlock(&conn->request_lock);
}
if (cancel_work) {
cancel_work->state = KSMBD_WORK_CANCELLED;
if (cancel_work->cancel_fn)
cancel_work->cancel_fn(cancel_work->cancel_argv);
}
/* For SMB2_CANCEL command itself send no response*/
work->send_no_response = 1;
return 0;
}
struct file_lock *smb_flock_init(struct file *f)
{
struct file_lock *fl;
fl = locks_alloc_lock();
if (!fl)
goto out;
locks_init_lock(fl);
fl->fl_owner = f;
fl->fl_pid = current->tgid;
fl->fl_file = f;
fl->fl_flags = FL_POSIX;
fl->fl_ops = NULL;
fl->fl_lmops = NULL;
out:
return fl;
}
static int smb2_set_flock_flags(struct file_lock *flock, int flags)
{
int cmd = -EINVAL;
/* Checking for wrong flag combination during lock request*/
switch (flags) {
case SMB2_LOCKFLAG_SHARED:
ksmbd_debug(SMB, "received shared request\n");
cmd = F_SETLKW;
flock->fl_type = F_RDLCK;
flock->fl_flags |= FL_SLEEP;
break;
case SMB2_LOCKFLAG_EXCLUSIVE:
ksmbd_debug(SMB, "received exclusive request\n");
cmd = F_SETLKW;
flock->fl_type = F_WRLCK;
flock->fl_flags |= FL_SLEEP;
break;
case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
ksmbd_debug(SMB,
"received shared & fail immediately request\n");
cmd = F_SETLK;
flock->fl_type = F_RDLCK;
break;
case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
ksmbd_debug(SMB,
"received exclusive & fail immediately request\n");
cmd = F_SETLK;
flock->fl_type = F_WRLCK;
break;
case SMB2_LOCKFLAG_UNLOCK:
ksmbd_debug(SMB, "received unlock request\n");
flock->fl_type = F_UNLCK;
cmd = 0;
break;
}
return cmd;
}
static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
unsigned int cmd, int flags,
struct list_head *lock_list)
{
struct ksmbd_lock *lock;
lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
if (!lock)
return NULL;
lock->cmd = cmd;
lock->fl = flock;
lock->start = flock->fl_start;
lock->end = flock->fl_end;
lock->flags = flags;
if (lock->start == lock->end)
lock->zero_len = 1;
INIT_LIST_HEAD(&lock->clist);
INIT_LIST_HEAD(&lock->flist);
INIT_LIST_HEAD(&lock->llist);
list_add_tail(&lock->llist, lock_list);
return lock;
}
static void smb2_remove_blocked_lock(void **argv)
{
struct file_lock *flock = (struct file_lock *)argv[0];
ksmbd_vfs_posix_lock_unblock(flock);
wake_up(&flock->fl_wait);
}
static inline bool lock_defer_pending(struct file_lock *fl)
{
/* check pending lock waiters */
return waitqueue_active(&fl->fl_wait);
}
/**
* smb2_lock() - handler for smb2 file lock command
* @work: smb work containing lock command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_lock(struct ksmbd_work *work)
{
struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
struct smb2_lock_element *lock_ele;
struct ksmbd_file *fp = NULL;
struct file_lock *flock = NULL;
struct file *filp = NULL;
int lock_count;
int flags = 0;
int cmd = 0;
int err = -EIO, i, rc = 0;
u64 lock_start, lock_length;
struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
struct ksmbd_conn *conn;
int nolock = 0;
LIST_HEAD(lock_list);
LIST_HEAD(rollback_list);
int prior_lock = 0;
ksmbd_debug(SMB, "Received lock request\n");
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
err = -ENOENT;
goto out2;
}
filp = fp->filp;
lock_count = le16_to_cpu(req->LockCount);
lock_ele = req->locks;
ksmbd_debug(SMB, "lock count is %d\n", lock_count);
if (!lock_count) {
err = -EINVAL;
goto out2;
}
for (i = 0; i < lock_count; i++) {
flags = le32_to_cpu(lock_ele[i].Flags);
flock = smb_flock_init(filp);
if (!flock)
goto out;
cmd = smb2_set_flock_flags(flock, flags);
lock_start = le64_to_cpu(lock_ele[i].Offset);
lock_length = le64_to_cpu(lock_ele[i].Length);
if (lock_start > U64_MAX - lock_length) {
pr_err("Invalid lock range requested\n");
rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
goto out;
}
if (lock_start > OFFSET_MAX)
flock->fl_start = OFFSET_MAX;
else
flock->fl_start = lock_start;
lock_length = le64_to_cpu(lock_ele[i].Length);
if (lock_length > OFFSET_MAX - flock->fl_start)
lock_length = OFFSET_MAX - flock->fl_start;
flock->fl_end = flock->fl_start + lock_length;
if (flock->fl_end < flock->fl_start) {
ksmbd_debug(SMB,
"the end offset(%llx) is smaller than the start offset(%llx)\n",
flock->fl_end, flock->fl_start);
rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
goto out;
}
/* Check conflict locks in one request */
list_for_each_entry(cmp_lock, &lock_list, llist) {
if (cmp_lock->fl->fl_start <= flock->fl_start &&
cmp_lock->fl->fl_end >= flock->fl_end) {
if (cmp_lock->fl->fl_type != F_UNLCK &&
flock->fl_type != F_UNLCK) {
pr_err("conflict two locks in one request\n");
err = -EINVAL;
goto out;
}
}
}
smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
if (!smb_lock) {
err = -EINVAL;
goto out;
}
}
list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
if (smb_lock->cmd < 0) {
err = -EINVAL;
goto out;
}
if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
err = -EINVAL;
goto out;
}
if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
(prior_lock == SMB2_LOCKFLAG_UNLOCK &&
!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
err = -EINVAL;
goto out;
}
prior_lock = smb_lock->flags;
if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
!(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
goto no_check_cl;
nolock = 1;
/* check locks in connection list */
read_lock(&conn_list_lock);
list_for_each_entry(conn, &conn_list, conns_list) {
spin_lock(&conn->llist_lock);
list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
if (file_inode(cmp_lock->fl->fl_file) !=
file_inode(smb_lock->fl->fl_file))
continue;
if (smb_lock->fl->fl_type == F_UNLCK) {
if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
cmp_lock->start == smb_lock->start &&
cmp_lock->end == smb_lock->end &&
!lock_defer_pending(cmp_lock->fl)) {
nolock = 0;
list_del(&cmp_lock->flist);
list_del(&cmp_lock->clist);
spin_unlock(&conn->llist_lock);
read_unlock(&conn_list_lock);
locks_free_lock(cmp_lock->fl);
kfree(cmp_lock);
goto out_check_cl;
}
continue;
}
if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
continue;
} else {
if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
continue;
}
/* check zero byte lock range */
if (cmp_lock->zero_len && !smb_lock->zero_len &&
cmp_lock->start > smb_lock->start &&
cmp_lock->start < smb_lock->end) {
spin_unlock(&conn->llist_lock);
read_unlock(&conn_list_lock);
pr_err("previous lock conflict with zero byte lock range\n");
goto out;
}
if (smb_lock->zero_len && !cmp_lock->zero_len &&
smb_lock->start > cmp_lock->start &&
smb_lock->start < cmp_lock->end) {
spin_unlock(&conn->llist_lock);
read_unlock(&conn_list_lock);
pr_err("current lock conflict with zero byte lock range\n");
goto out;
}
if (((cmp_lock->start <= smb_lock->start &&
cmp_lock->end > smb_lock->start) ||
(cmp_lock->start < smb_lock->end &&
cmp_lock->end >= smb_lock->end)) &&
!cmp_lock->zero_len && !smb_lock->zero_len) {
spin_unlock(&conn->llist_lock);
read_unlock(&conn_list_lock);
pr_err("Not allow lock operation on exclusive lock range\n");
goto out;
}
}
spin_unlock(&conn->llist_lock);
}
read_unlock(&conn_list_lock);
out_check_cl:
if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
pr_err("Try to unlock nolocked range\n");
rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
goto out;
}
no_check_cl:
if (smb_lock->zero_len) {
err = 0;
goto skip;
}
flock = smb_lock->fl;
list_del(&smb_lock->llist);
retry:
rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
skip:
if (flags & SMB2_LOCKFLAG_UNLOCK) {
if (!rc) {
ksmbd_debug(SMB, "File unlocked\n");
} else if (rc == -ENOENT) {
rsp->hdr.Status = STATUS_NOT_LOCKED;
goto out;
}
locks_free_lock(flock);
kfree(smb_lock);
} else {
if (rc == FILE_LOCK_DEFERRED) {
void **argv;
ksmbd_debug(SMB,
"would have to wait for getting lock\n");
spin_lock(&work->conn->llist_lock);
list_add_tail(&smb_lock->clist,
&work->conn->lock_list);
spin_unlock(&work->conn->llist_lock);
list_add(&smb_lock->llist, &rollback_list);
argv = kmalloc(sizeof(void *), GFP_KERNEL);
if (!argv) {
err = -ENOMEM;
goto out;
}
argv[0] = flock;
rc = setup_async_work(work,
smb2_remove_blocked_lock,
argv);
if (rc) {
err = -ENOMEM;
goto out;
}
spin_lock(&fp->f_lock);
list_add(&work->fp_entry, &fp->blocked_works);
spin_unlock(&fp->f_lock);
smb2_send_interim_resp(work, STATUS_PENDING);
ksmbd_vfs_posix_lock_wait(flock);
if (work->state != KSMBD_WORK_ACTIVE) {
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
locks_free_lock(flock);
if (work->state == KSMBD_WORK_CANCELLED) {
spin_lock(&fp->f_lock);
list_del(&work->fp_entry);
spin_unlock(&fp->f_lock);
rsp->hdr.Status =
STATUS_CANCELLED;
kfree(smb_lock);
smb2_send_interim_resp(work,
STATUS_CANCELLED);
work->send_no_response = 1;
goto out;
}
init_smb2_rsp_hdr(work);
smb2_set_err_rsp(work);
rsp->hdr.Status =
STATUS_RANGE_NOT_LOCKED;
kfree(smb_lock);
goto out2;
}
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
spin_lock(&fp->f_lock);
list_del(&work->fp_entry);
spin_unlock(&fp->f_lock);
goto retry;
} else if (!rc) {
spin_lock(&work->conn->llist_lock);
list_add_tail(&smb_lock->clist,
&work->conn->lock_list);
list_add_tail(&smb_lock->flist,
&fp->lock_list);
spin_unlock(&work->conn->llist_lock);
list_add(&smb_lock->llist, &rollback_list);
ksmbd_debug(SMB, "successful in taking lock\n");
} else {
goto out;
}
}
}
if (atomic_read(&fp->f_ci->op_count) > 1)
smb_break_all_oplock(work, fp);
rsp->StructureSize = cpu_to_le16(4);
ksmbd_debug(SMB, "successful in taking lock\n");
rsp->hdr.Status = STATUS_SUCCESS;
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
ksmbd_fd_put(work, fp);
return 0;
out:
list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
locks_free_lock(smb_lock->fl);
list_del(&smb_lock->llist);
kfree(smb_lock);
}
list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
struct file_lock *rlock = NULL;
rlock = smb_flock_init(filp);
rlock->fl_type = F_UNLCK;
rlock->fl_start = smb_lock->start;
rlock->fl_end = smb_lock->end;
rc = vfs_lock_file(filp, 0, rlock, NULL);
if (rc)
pr_err("rollback unlock fail : %d\n", rc);
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
if (!list_empty(&smb_lock->flist))
list_del(&smb_lock->flist);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
locks_free_lock(smb_lock->fl);
locks_free_lock(rlock);
kfree(smb_lock);
}
out2:
ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
if (!rsp->hdr.Status) {
if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (err == -ENOMEM)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else
rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
}
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return err;
}
static int fsctl_copychunk(struct ksmbd_work *work,
struct copychunk_ioctl_req *ci_req,
unsigned int cnt_code,
unsigned int input_count,
unsigned long long volatile_id,
unsigned long long persistent_id,
struct smb2_ioctl_rsp *rsp)
{
struct copychunk_ioctl_rsp *ci_rsp;
struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
struct srv_copychunk *chunks;
unsigned int i, chunk_count, chunk_count_written = 0;
unsigned int chunk_size_written = 0;
loff_t total_size_written = 0;
int ret = 0;
ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
rsp->VolatileFileId = volatile_id;
rsp->PersistentFileId = persistent_id;
ci_rsp->ChunksWritten =
cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
ci_rsp->ChunkBytesWritten =
cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
ci_rsp->TotalBytesWritten =
cpu_to_le32(ksmbd_server_side_copy_max_total_size());
chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
chunk_count = le32_to_cpu(ci_req->ChunkCount);
if (chunk_count == 0)
goto out;
total_size_written = 0;
/* verify the SRV_COPYCHUNK_COPY packet */
if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
chunk_count * sizeof(struct srv_copychunk)) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
return -EINVAL;
}
for (i = 0; i < chunk_count; i++) {
if (le32_to_cpu(chunks[i].Length) == 0 ||
le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
break;
total_size_written += le32_to_cpu(chunks[i].Length);
}
if (i < chunk_count ||
total_size_written > ksmbd_server_side_copy_max_total_size()) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
return -EINVAL;
}
src_fp = ksmbd_lookup_foreign_fd(work,
le64_to_cpu(ci_req->ResumeKey[0]));
dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
ret = -EINVAL;
if (!src_fp ||
src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
goto out;
}
if (!dst_fp) {
rsp->hdr.Status = STATUS_FILE_CLOSED;
goto out;
}
/*
* FILE_READ_DATA should only be included in
* the FSCTL_COPYCHUNK case
*/
if (cnt_code == FSCTL_COPYCHUNK &&
!(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
rsp->hdr.Status = STATUS_ACCESS_DENIED;
goto out;
}
ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
chunks, chunk_count,
&chunk_count_written,
&chunk_size_written,
&total_size_written);
if (ret < 0) {
if (ret == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
if (ret == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (ret == -EBADF)
rsp->hdr.Status = STATUS_INVALID_HANDLE;
else if (ret == -EFBIG || ret == -ENOSPC)
rsp->hdr.Status = STATUS_DISK_FULL;
else if (ret == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (ret == -EISDIR)
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
else if (ret == -E2BIG)
rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
else
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
}
ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
out:
ksmbd_fd_put(work, src_fp);
ksmbd_fd_put(work, dst_fp);
return ret;
}
static __be32 idev_ipv4_address(struct in_device *idev)
{
__be32 addr = 0;
struct in_ifaddr *ifa;
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa, idev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
addr = ifa->ifa_address;
break;
}
rcu_read_unlock();
return addr;
}
static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
struct smb2_ioctl_rsp *rsp,
unsigned int out_buf_len)
{
struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
int nbytes = 0;
struct net_device *netdev;
struct sockaddr_storage_rsp *sockaddr_storage;
unsigned int flags;
unsigned long long speed;
rtnl_lock();
for_each_netdev(&init_net, netdev) {
bool ipv4_set = false;
if (netdev->type == ARPHRD_LOOPBACK)
continue;
flags = dev_get_flags(netdev);
if (!(flags & IFF_RUNNING))
continue;
ipv6_retry:
if (out_buf_len <
nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
rtnl_unlock();
return -ENOSPC;
}
nii_rsp = (struct network_interface_info_ioctl_rsp *)
&rsp->Buffer[nbytes];
nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
nii_rsp->Capability = 0;
if (netdev->real_num_tx_queues > 1)
nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
if (ksmbd_rdma_capable_netdev(netdev))
nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
nii_rsp->Next = cpu_to_le32(152);
nii_rsp->Reserved = 0;
if (netdev->ethtool_ops->get_link_ksettings) {
struct ethtool_link_ksettings cmd;
netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
speed = cmd.base.speed;
} else {
ksmbd_debug(SMB, "%s %s\n", netdev->name,
"speed is unknown, defaulting to 1Gb/sec");
speed = SPEED_1000;
}
speed *= 1000000;
nii_rsp->LinkSpeed = cpu_to_le64(speed);
sockaddr_storage = (struct sockaddr_storage_rsp *)
nii_rsp->SockAddr_Storage;
memset(sockaddr_storage, 0, 128);
if (!ipv4_set) {
struct in_device *idev;
sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
sockaddr_storage->addr4.Port = 0;
idev = __in_dev_get_rtnl(netdev);
if (!idev)
continue;
sockaddr_storage->addr4.IPv4address =
idev_ipv4_address(idev);
nbytes += sizeof(struct network_interface_info_ioctl_rsp);
ipv4_set = true;
goto ipv6_retry;
} else {
struct inet6_dev *idev6;
struct inet6_ifaddr *ifa;
__u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
sockaddr_storage->addr6.Port = 0;
sockaddr_storage->addr6.FlowInfo = 0;
idev6 = __in6_dev_get(netdev);
if (!idev6)
continue;
list_for_each_entry(ifa, &idev6->addr_list, if_list) {
if (ifa->flags & (IFA_F_TENTATIVE |
IFA_F_DEPRECATED))
continue;
memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
break;
}
sockaddr_storage->addr6.ScopeId = 0;
nbytes += sizeof(struct network_interface_info_ioctl_rsp);
}
}
rtnl_unlock();
/* zero if this is last one */
if (nii_rsp)
nii_rsp->Next = 0;
rsp->PersistentFileId = SMB2_NO_FID;
rsp->VolatileFileId = SMB2_NO_FID;
return nbytes;
}
static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
struct validate_negotiate_info_req *neg_req,
struct validate_negotiate_info_rsp *neg_rsp,
unsigned int in_buf_len)
{
int ret = 0;
int dialect;
if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
return -EINVAL;
dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
neg_req->DialectCount);
if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
ret = -EINVAL;
goto err_out;
}
if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
ret = -EINVAL;
goto err_out;
}
if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
ret = -EINVAL;
goto err_out;
}
if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
ret = -EINVAL;
goto err_out;
}
neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
neg_rsp->Dialect = cpu_to_le16(conn->dialect);
err_out:
return ret;
}
static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
struct file_allocated_range_buffer *qar_req,
struct file_allocated_range_buffer *qar_rsp,
unsigned int in_count, unsigned int *out_count)
{
struct ksmbd_file *fp;
loff_t start, length;
int ret = 0;
*out_count = 0;
if (in_count == 0)
return -EINVAL;
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp)
return -ENOENT;
start = le64_to_cpu(qar_req->file_offset);
length = le64_to_cpu(qar_req->length);
ret = ksmbd_vfs_fqar_lseek(fp, start, length,
qar_rsp, in_count, out_count);
if (ret && ret != -E2BIG)
*out_count = 0;
ksmbd_fd_put(work, fp);
return ret;
}
static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
unsigned int out_buf_len,
struct smb2_ioctl_req *req,
struct smb2_ioctl_rsp *rsp)
{
struct ksmbd_rpc_command *rpc_resp;
char *data_buf = (char *)&req->Buffer[0];
int nbytes = 0;
rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
le32_to_cpu(req->InputCount));
if (rpc_resp) {
if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
/*
* set STATUS_SOME_NOT_MAPPED response
* for unknown domain sid.
*/
rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
} else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
goto out;
} else if (rpc_resp->flags != KSMBD_RPC_OK) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto out;
}
nbytes = rpc_resp->payload_sz;
if (rpc_resp->payload_sz > out_buf_len) {
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
nbytes = out_buf_len;
}
if (!rpc_resp->payload_sz) {
rsp->hdr.Status =
STATUS_UNEXPECTED_IO_ERROR;
goto out;
}
memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
}
out:
kvfree(rpc_resp);
return nbytes;
}
static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
struct file_sparse *sparse)
{
struct ksmbd_file *fp;
struct user_namespace *user_ns;
int ret = 0;
__le32 old_fattr;
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp)
return -ENOENT;
user_ns = file_mnt_user_ns(fp->filp);
old_fattr = fp->f_ci->m_fattr;
if (sparse->SetSparse)
fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
else
fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
if (fp->f_ci->m_fattr != old_fattr &&
test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
struct xattr_dos_attrib da;
ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
fp->filp->f_path.dentry, &da);
if (ret <= 0)
goto out;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
fp->filp->f_path.dentry, &da);
if (ret)
fp->f_ci->m_fattr = old_fattr;
}
out:
ksmbd_fd_put(work, fp);
return ret;
}
static int fsctl_request_resume_key(struct ksmbd_work *work,
struct smb2_ioctl_req *req,
struct resume_key_ioctl_rsp *key_rsp)
{
struct ksmbd_file *fp;
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp)
return -ENOENT;
memset(key_rsp, 0, sizeof(*key_rsp));
key_rsp->ResumeKey[0] = req->VolatileFileId;
key_rsp->ResumeKey[1] = req->PersistentFileId;
ksmbd_fd_put(work, fp);
return 0;
}
/**
* smb2_ioctl() - handler for smb2 ioctl command
* @work: smb work containing ioctl command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_ioctl(struct ksmbd_work *work)
{
struct smb2_ioctl_req *req;
struct smb2_ioctl_rsp *rsp;
unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
u64 id = KSMBD_NO_FID;
struct ksmbd_conn *conn = work->conn;
int ret = 0;
if (work->next_smb2_rcv_hdr_off) {
req = ksmbd_req_buf_next(work);
rsp = ksmbd_resp_buf_next(work);
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
}
} else {
req = smb2_get_msg(work->request_buf);
rsp = smb2_get_msg(work->response_buf);
}
if (!has_file_id(id))
id = req->VolatileFileId;
if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
goto out;
}
cnt_code = le32_to_cpu(req->CtlCode);
ret = smb2_calc_max_out_buf_len(work, 48,
le32_to_cpu(req->MaxOutputResponse));
if (ret < 0) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto out;
}
out_buf_len = (unsigned int)ret;
in_buf_len = le32_to_cpu(req->InputCount);
switch (cnt_code) {
case FSCTL_DFS_GET_REFERRALS:
case FSCTL_DFS_GET_REFERRALS_EX:
/* Not support DFS yet */
rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
goto out;
case FSCTL_CREATE_OR_GET_OBJECT_ID:
{
struct file_object_buf_type1_ioctl_rsp *obj_buf;
nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
&rsp->Buffer[0];
/*
* TODO: This is dummy implementation to pass smbtorture
* Need to check correct response later
*/
memset(obj_buf->ObjectId, 0x0, 16);
memset(obj_buf->BirthVolumeId, 0x0, 16);
memset(obj_buf->BirthObjectId, 0x0, 16);
memset(obj_buf->DomainId, 0x0, 16);
break;
}
case FSCTL_PIPE_TRANSCEIVE:
out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
break;
case FSCTL_VALIDATE_NEGOTIATE_INFO:
if (conn->dialect < SMB30_PROT_ID) {
ret = -EOPNOTSUPP;
goto out;
}
if (in_buf_len < sizeof(struct validate_negotiate_info_req))
return -EINVAL;
if (out_buf_len < sizeof(struct validate_negotiate_info_rsp))
return -EINVAL;
ret = fsctl_validate_negotiate_info(conn,
(struct validate_negotiate_info_req *)&req->Buffer[0],
(struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
in_buf_len);
if (ret < 0)
goto out;
nbytes = sizeof(struct validate_negotiate_info_rsp);
rsp->PersistentFileId = SMB2_NO_FID;
rsp->VolatileFileId = SMB2_NO_FID;
break;
case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
if (ret < 0)
goto out;
nbytes = ret;
break;
case FSCTL_REQUEST_RESUME_KEY:
if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_request_resume_key(work, req,
(struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
if (ret < 0)
goto out;
rsp->PersistentFileId = req->PersistentFileId;
rsp->VolatileFileId = req->VolatileFileId;
nbytes = sizeof(struct resume_key_ioctl_rsp);
break;
case FSCTL_COPYCHUNK:
case FSCTL_COPYCHUNK_WRITE:
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
ret = -EACCES;
goto out;
}
if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
ret = -EINVAL;
goto out;
}
if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
ret = -EINVAL;
goto out;
}
nbytes = sizeof(struct copychunk_ioctl_rsp);
rsp->VolatileFileId = req->VolatileFileId;
rsp->PersistentFileId = req->PersistentFileId;
fsctl_copychunk(work,
(struct copychunk_ioctl_req *)&req->Buffer[0],
le32_to_cpu(req->CtlCode),
le32_to_cpu(req->InputCount),
req->VolatileFileId,
req->PersistentFileId,
rsp);
break;
case FSCTL_SET_SPARSE:
if (in_buf_len < sizeof(struct file_sparse)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_set_sparse(work, id,
(struct file_sparse *)&req->Buffer[0]);
if (ret < 0)
goto out;
break;
case FSCTL_SET_ZERO_DATA:
{
struct file_zero_data_information *zero_data;
struct ksmbd_file *fp;
loff_t off, len, bfz;
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
ret = -EACCES;
goto out;
}
if (in_buf_len < sizeof(struct file_zero_data_information)) {
ret = -EINVAL;
goto out;
}
zero_data =
(struct file_zero_data_information *)&req->Buffer[0];
off = le64_to_cpu(zero_data->FileOffset);
bfz = le64_to_cpu(zero_data->BeyondFinalZero);
if (off > bfz) {
ret = -EINVAL;
goto out;
}
len = bfz - off;
if (len) {
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp) {
ret = -ENOENT;
goto out;
}
ret = ksmbd_vfs_zero_data(work, fp, off, len);
ksmbd_fd_put(work, fp);
if (ret < 0)
goto out;
}
break;
}
case FSCTL_QUERY_ALLOCATED_RANGES:
if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_query_allocated_ranges(work, id,
(struct file_allocated_range_buffer *)&req->Buffer[0],
(struct file_allocated_range_buffer *)&rsp->Buffer[0],
out_buf_len /
sizeof(struct file_allocated_range_buffer), &nbytes);
if (ret == -E2BIG) {
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
} else if (ret < 0) {
nbytes = 0;
goto out;
}
nbytes *= sizeof(struct file_allocated_range_buffer);
break;
case FSCTL_GET_REPARSE_POINT:
{
struct reparse_data_buffer *reparse_ptr;
struct ksmbd_file *fp;
reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp) {
pr_err("not found fp!!\n");
ret = -ENOENT;
goto out;
}
reparse_ptr->ReparseTag =
smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
reparse_ptr->ReparseDataLength = 0;
ksmbd_fd_put(work, fp);
nbytes = sizeof(struct reparse_data_buffer);
break;
}
case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
{
struct ksmbd_file *fp_in, *fp_out = NULL;
struct duplicate_extents_to_file *dup_ext;
loff_t src_off, dst_off, length, cloned;
if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
ret = -EINVAL;
goto out;
}
dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
dup_ext->PersistentFileHandle);
if (!fp_in) {
pr_err("not found file handle in duplicate extent to file\n");
ret = -ENOENT;
goto out;
}
fp_out = ksmbd_lookup_fd_fast(work, id);
if (!fp_out) {
pr_err("not found fp\n");
ret = -ENOENT;
goto dup_ext_out;
}
src_off = le64_to_cpu(dup_ext->SourceFileOffset);
dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
length = le64_to_cpu(dup_ext->ByteCount);
/*
* XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
* should fall back to vfs_copy_file_range(). This could be
* beneficial when re-exporting nfs/smb mount, but note that
* this can result in partial copy that returns an error status.
* If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
* fall back to vfs_copy_file_range(), should be avoided when
* the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
*/
cloned = vfs_clone_file_range(fp_in->filp, src_off,
fp_out->filp, dst_off, length, 0);
if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
ret = -EOPNOTSUPP;
goto dup_ext_out;
} else if (cloned != length) {
cloned = vfs_copy_file_range(fp_in->filp, src_off,
fp_out->filp, dst_off,
length, 0);
if (cloned != length) {
if (cloned < 0)
ret = cloned;
else
ret = -EINVAL;
}
}
dup_ext_out:
ksmbd_fd_put(work, fp_in);
ksmbd_fd_put(work, fp_out);
if (ret < 0)
goto out;
break;
}
default:
ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
cnt_code);
ret = -EOPNOTSUPP;
goto out;
}
rsp->CtlCode = cpu_to_le32(cnt_code);
rsp->InputCount = cpu_to_le32(0);
rsp->InputOffset = cpu_to_le32(112);
rsp->OutputOffset = cpu_to_le32(112);
rsp->OutputCount = cpu_to_le32(nbytes);
rsp->StructureSize = cpu_to_le16(49);
rsp->Reserved = cpu_to_le16(0);
rsp->Flags = cpu_to_le32(0);
rsp->Reserved2 = cpu_to_le32(0);
inc_rfc1001_len(work->response_buf, 48 + nbytes);
return 0;
out:
if (ret == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (ret == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
else if (ret == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
else if (ret == -ENOSPC)
rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
else if (ret < 0 || rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
return 0;
}
/**
* smb20_oplock_break_ack() - handler for smb2.0 oplock break command
* @work: smb work containing oplock break command buffer
*
* Return: 0
*/
static void smb20_oplock_break_ack(struct ksmbd_work *work)
{
struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_file *fp;
struct oplock_info *opinfo = NULL;
__le32 err = 0;
int ret = 0;
u64 volatile_id, persistent_id;
char req_oplevel = 0, rsp_oplevel = 0;
unsigned int oplock_change_type;
volatile_id = req->VolatileFid;
persistent_id = req->PersistentFid;
req_oplevel = req->OplockLevel;
ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
volatile_id, persistent_id, req_oplevel);
fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
if (!fp) {
rsp->hdr.Status = STATUS_FILE_CLOSED;
smb2_set_err_rsp(work);
return;
}
opinfo = opinfo_get(fp);
if (!opinfo) {
pr_err("unexpected null oplock_info\n");
rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return;
}
if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
goto err_out;
}
if (opinfo->op_state == OPLOCK_STATE_NONE) {
ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
(req_oplevel != SMB2_OPLOCK_LEVEL_II &&
req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
oplock_change_type = OPLOCK_WRITE_TO_NONE;
} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
oplock_change_type = OPLOCK_READ_TO_NONE;
} else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
err = STATUS_INVALID_DEVICE_STATE;
if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
req_oplevel == SMB2_OPLOCK_LEVEL_II) {
oplock_change_type = OPLOCK_WRITE_TO_READ;
} else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
oplock_change_type = OPLOCK_WRITE_TO_NONE;
} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
oplock_change_type = OPLOCK_READ_TO_NONE;
} else {
oplock_change_type = 0;
}
} else {
oplock_change_type = 0;
}
switch (oplock_change_type) {
case OPLOCK_WRITE_TO_READ:
ret = opinfo_write_to_read(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
break;
case OPLOCK_WRITE_TO_NONE:
ret = opinfo_write_to_none(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
break;
case OPLOCK_READ_TO_NONE:
ret = opinfo_read_to_none(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
break;
default:
pr_err("unknown oplock change 0x%x -> 0x%x\n",
opinfo->level, rsp_oplevel);
}
if (ret < 0) {
rsp->hdr.Status = err;
goto err_out;
}
opinfo_put(opinfo);
ksmbd_fd_put(work, fp);
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
rsp->StructureSize = cpu_to_le16(24);
rsp->OplockLevel = rsp_oplevel;
rsp->Reserved = 0;
rsp->Reserved2 = 0;
rsp->VolatileFid = volatile_id;
rsp->PersistentFid = persistent_id;
inc_rfc1001_len(work->response_buf, 24);
return;
err_out:
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
opinfo_put(opinfo);
ksmbd_fd_put(work, fp);
smb2_set_err_rsp(work);
}
static int check_lease_state(struct lease *lease, __le32 req_state)
{
if ((lease->new_state ==
(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
!(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
lease->new_state = req_state;
return 0;
}
if (lease->new_state == req_state)
return 0;
return 1;
}
/**
* smb21_lease_break_ack() - handler for smb2.1 lease break command
* @work: smb work containing lease break command buffer
*
* Return: 0
*/
static void smb21_lease_break_ack(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
struct oplock_info *opinfo;
__le32 err = 0;
int ret = 0;
unsigned int lease_change_type;
__le32 lease_state;
struct lease *lease;
ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
le32_to_cpu(req->LeaseState));
opinfo = lookup_lease_in_table(conn, req->LeaseKey);
if (!opinfo) {
ksmbd_debug(OPLOCK, "file not opened\n");
smb2_set_err_rsp(work);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
return;
}
lease = opinfo->o_lease;
if (opinfo->op_state == OPLOCK_STATE_NONE) {
pr_err("unexpected lease break state 0x%x\n",
opinfo->op_state);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
if (check_lease_state(lease, req->LeaseState)) {
rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
ksmbd_debug(OPLOCK,
"req lease state: 0x%x, expected state: 0x%x\n",
req->LeaseState, lease->new_state);
goto err_out;
}
if (!atomic_read(&opinfo->breaking_cnt)) {
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
/* check for bad lease state */
if (req->LeaseState &
(~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_NONE;
else
lease_change_type = OPLOCK_READ_TO_NONE;
ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
} else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
req->LeaseState != SMB2_LEASE_NONE_LE) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
lease_change_type = OPLOCK_READ_TO_NONE;
ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
} else {
/* valid lease state changes */
err = STATUS_INVALID_DEVICE_STATE;
if (req->LeaseState == SMB2_LEASE_NONE_LE) {
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_NONE;
else
lease_change_type = OPLOCK_READ_TO_NONE;
} else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_READ;
else
lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
} else {
lease_change_type = 0;
}
}
switch (lease_change_type) {
case OPLOCK_WRITE_TO_READ:
ret = opinfo_write_to_read(opinfo);
break;
case OPLOCK_READ_HANDLE_TO_READ:
ret = opinfo_read_handle_to_read(opinfo);
break;
case OPLOCK_WRITE_TO_NONE:
ret = opinfo_write_to_none(opinfo);
break;
case OPLOCK_READ_TO_NONE:
ret = opinfo_read_to_none(opinfo);
break;
default:
ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
}
lease_state = lease->state;
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
atomic_dec(&opinfo->breaking_cnt);
wake_up_interruptible_all(&opinfo->oplock_brk);
opinfo_put(opinfo);
if (ret < 0) {
rsp->hdr.Status = err;
goto err_out;
}
rsp->StructureSize = cpu_to_le16(36);
rsp->Reserved = 0;
rsp->Flags = 0;
memcpy(rsp->LeaseKey, req->LeaseKey, 16);
rsp->LeaseState = lease_state;
rsp->LeaseDuration = 0;
inc_rfc1001_len(work->response_buf, 36);
return;
err_out:
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
atomic_dec(&opinfo->breaking_cnt);
wake_up_interruptible_all(&opinfo->oplock_brk);
opinfo_put(opinfo);
smb2_set_err_rsp(work);
}
/**
* smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
* @work: smb work containing oplock/lease break command buffer
*
* Return: 0
*/
int smb2_oplock_break(struct ksmbd_work *work)
{
struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
switch (le16_to_cpu(req->StructureSize)) {
case OP_BREAK_STRUCT_SIZE_20:
smb20_oplock_break_ack(work);
break;
case OP_BREAK_STRUCT_SIZE_21:
smb21_lease_break_ack(work);
break;
default:
ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
le16_to_cpu(req->StructureSize));
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
}
return 0;
}
/**
* smb2_notify() - handler for smb2 notify request
* @work: smb work containing notify command buffer
*
* Return: 0
*/
int smb2_notify(struct ksmbd_work *work)
{
struct smb2_change_notify_req *req;
struct smb2_change_notify_rsp *rsp;
WORK_BUFFERS(work, req, rsp);
if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
rsp->hdr.Status = STATUS_INTERNAL_ERROR;
smb2_set_err_rsp(work);
return 0;
}
smb2_set_err_rsp(work);
rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
return 0;
}
/**
* smb2_is_sign_req() - handler for checking packet signing status
* @work: smb work containing notify command buffer
* @command: SMB2 command id
*
* Return: true if packed is signed, false otherwise
*/
bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
{
struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
command != SMB2_NEGOTIATE_HE &&
command != SMB2_SESSION_SETUP_HE &&
command != SMB2_OPLOCK_BREAK_HE)
return true;
return false;
}
/**
* smb2_check_sign_req() - handler for req packet sign processing
* @work: smb work containing notify command buffer
*
* Return: 1 on success, 0 otherwise
*/
int smb2_check_sign_req(struct ksmbd_work *work)
{
struct smb2_hdr *hdr;
char signature_req[SMB2_SIGNATURE_SIZE];
char signature[SMB2_HMACSHA256_SIZE];
struct kvec iov[1];
size_t len;
hdr = smb2_get_msg(work->request_buf);
if (work->next_smb2_rcv_hdr_off)
hdr = ksmbd_req_buf_next(work);
if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
len = get_rfc1002_len(work->request_buf);
else if (hdr->NextCommand)
len = le32_to_cpu(hdr->NextCommand);
else
len = get_rfc1002_len(work->request_buf) -
work->next_smb2_rcv_hdr_off;
memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
signature))
return 0;
if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
pr_err("bad smb2 signature\n");
return 0;
}
return 1;
}
/**
* smb2_set_sign_rsp() - handler for rsp packet sign processing
* @work: smb work containing notify command buffer
*
*/
void smb2_set_sign_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *hdr;
struct smb2_hdr *req_hdr;
char signature[SMB2_HMACSHA256_SIZE];
struct kvec iov[2];
size_t len;
int n_vec = 1;
hdr = smb2_get_msg(work->response_buf);
if (work->next_smb2_rsp_hdr_off)
hdr = ksmbd_resp_buf_next(work);
req_hdr = ksmbd_req_buf_next(work);
if (!work->next_smb2_rsp_hdr_off) {
len = get_rfc1002_len(work->response_buf);
if (req_hdr->NextCommand)
len = ALIGN(len, 8);
} else {
len = get_rfc1002_len(work->response_buf) -
work->next_smb2_rsp_hdr_off;
len = ALIGN(len, 8);
}
if (req_hdr->NextCommand)
hdr->NextCommand = cpu_to_le32(len);
hdr->Flags |= SMB2_FLAGS_SIGNED;
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (work->aux_payload_sz) {
iov[0].iov_len -= work->aux_payload_sz;
iov[1].iov_base = work->aux_payload_buf;
iov[1].iov_len = work->aux_payload_sz;
n_vec++;
}
if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
signature))
memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
}
/**
* smb3_check_sign_req() - handler for req packet sign processing
* @work: smb work containing notify command buffer
*
* Return: 1 on success, 0 otherwise
*/
int smb3_check_sign_req(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
char *signing_key;
struct smb2_hdr *hdr;
struct channel *chann;
char signature_req[SMB2_SIGNATURE_SIZE];
char signature[SMB2_CMACAES_SIZE];
struct kvec iov[1];
size_t len;
hdr = smb2_get_msg(work->request_buf);
if (work->next_smb2_rcv_hdr_off)
hdr = ksmbd_req_buf_next(work);
if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
len = get_rfc1002_len(work->request_buf);
else if (hdr->NextCommand)
len = le32_to_cpu(hdr->NextCommand);
else
len = get_rfc1002_len(work->request_buf) -
work->next_smb2_rcv_hdr_off;
if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
} else {
chann = lookup_chann_list(work->sess, conn);
if (!chann)
return 0;
signing_key = chann->smb3signingkey;
}
if (!signing_key) {
pr_err("SMB3 signing key is not generated\n");
return 0;
}
memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
return 0;
if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
pr_err("bad smb2 signature\n");
return 0;
}
return 1;
}
/**
* smb3_set_sign_rsp() - handler for rsp packet sign processing
* @work: smb work containing notify command buffer
*
*/
void smb3_set_sign_rsp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *req_hdr, *hdr;
struct channel *chann;
char signature[SMB2_CMACAES_SIZE];
struct kvec iov[2];
int n_vec = 1;
size_t len;
char *signing_key;
hdr = smb2_get_msg(work->response_buf);
if (work->next_smb2_rsp_hdr_off)
hdr = ksmbd_resp_buf_next(work);
req_hdr = ksmbd_req_buf_next(work);
if (!work->next_smb2_rsp_hdr_off) {
len = get_rfc1002_len(work->response_buf);
if (req_hdr->NextCommand)
len = ALIGN(len, 8);
} else {
len = get_rfc1002_len(work->response_buf) -
work->next_smb2_rsp_hdr_off;
len = ALIGN(len, 8);
}
if (conn->binding == false &&
le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
} else {
chann = lookup_chann_list(work->sess, work->conn);
if (!chann)
return;
signing_key = chann->smb3signingkey;
}
if (!signing_key)
return;
if (req_hdr->NextCommand)
hdr->NextCommand = cpu_to_le32(len);
hdr->Flags |= SMB2_FLAGS_SIGNED;
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (work->aux_payload_sz) {
iov[0].iov_len -= work->aux_payload_sz;
iov[1].iov_base = work->aux_payload_buf;
iov[1].iov_len = work->aux_payload_sz;
n_vec++;
}
if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
}
/**
* smb3_preauth_hash_rsp() - handler for computing preauth hash on response
* @work: smb work containing response buffer
*
*/
void smb3_preauth_hash_rsp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct smb2_hdr *req, *rsp;
if (conn->dialect != SMB311_PROT_ID)
return;
WORK_BUFFERS(work, req, rsp);
if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
conn->preauth_info)
ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
conn->preauth_info->Preauth_HashValue);
if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
__u8 *hash_value;
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
if (!preauth_sess)
return;
hash_value = preauth_sess->Preauth_HashValue;
} else {
hash_value = sess->Preauth_HashValue;
if (!hash_value)
return;
}
ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
hash_value);
}
}
static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
{
struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
struct smb2_hdr *hdr = smb2_get_msg(old_buf);
unsigned int orig_len = get_rfc1002_len(old_buf);
/* tr_buf must be cleared by the caller */
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
cipher_type == SMB2_ENCRYPTION_AES256_GCM)
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
else
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
inc_rfc1001_len(tr_buf, orig_len);
}
int smb3_encrypt_resp(struct ksmbd_work *work)
{
char *buf = work->response_buf;
struct kvec iov[3];
int rc = -ENOMEM;
int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
if (ARRAY_SIZE(iov) < rq_nvec)
return -ENOMEM;
work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
if (!work->tr_buf)
return rc;
/* fill transform header */
fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
iov[0].iov_base = work->tr_buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
buf_size += iov[0].iov_len - 4;
iov[1].iov_base = buf + 4;
iov[1].iov_len = get_rfc1002_len(buf);
if (work->aux_payload_sz) {
iov[1].iov_len = work->resp_hdr_sz - 4;
iov[2].iov_base = work->aux_payload_buf;
iov[2].iov_len = work->aux_payload_sz;
buf_size += iov[2].iov_len;
}
buf_size += iov[1].iov_len;
work->resp_hdr_sz = iov[1].iov_len;
rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
if (rc)
return rc;
memmove(buf, iov[1].iov_base, iov[1].iov_len);
*(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
return rc;
}
bool smb3_is_transform_hdr(void *buf)
{
struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
}
int smb3_decrypt_req(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess;
char *buf = work->request_buf;
unsigned int pdu_length = get_rfc1002_len(buf);
struct kvec iov[2];
int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
int rc = 0;
if (buf_data_size < sizeof(struct smb2_hdr)) {
pr_err("Transform message is too small (%u)\n",
pdu_length);
return -ECONNABORTED;
}
if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
pr_err("Transform message is broken\n");
return -ECONNABORTED;
}
sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
if (!sess) {
pr_err("invalid session id(%llx) in transform header\n",
le64_to_cpu(tr_hdr->SessionId));
return -ECONNABORTED;
}
iov[0].iov_base = buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_len = buf_data_size;
rc = ksmbd_crypt_message(conn, iov, 2, 0);
if (rc)
return rc;
memmove(buf + 4, iov[1].iov_base, buf_data_size);
*(__be32 *)buf = cpu_to_be32(buf_data_size);
return rc;
}
bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
if (conn->dialect < SMB30_PROT_ID)
return false;
if (work->next_smb2_rcv_hdr_off)
rsp = ksmbd_resp_buf_next(work);
if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
rsp->Status == STATUS_SUCCESS)
return true;
return false;
}
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