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samba-mirror/source3/smbd/smb2_create.c
Stefan Metzmacher 759416582c s3:smbd: only pass UCF_PREP_CREATEFILE to filename_convert() if we may create a new file
This fixes a regression introduced by commit
f98d10af2a
(smbd: Always use UCF_PREP_CREATEFILE for filename_convert calls to resolve a path for open)

The main problem was that Windows client seem to verify
the access to user.V2\ntuser.ini is rejected with NT_STATUS_ACCESS_DENIED,
using the machine credentials.

Passing UCF_PREP_CREATEFILE to filename_convert() triggers a code path
that implements a dropbox behaviour. A dropbox is a directory with only -wx permissions,
so get_real_filename fails with EACCESS, it needs to list the directory.
EACCESS is ignored with UCF_PREP_CREATEFILE.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=10297

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Oct 25 05:33:36 CEST 2016 on sn-devel-144
2016-10-25 05:33:36 +02:00

1735 lines
48 KiB
C

/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
Copyright (C) Jeremy Allison 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "printing.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../librpc/gen_ndr/ndr_security.h"
#include "../librpc/gen_ndr/ndr_smb2_lease_struct.h"
#include "../lib/util/tevent_ntstatus.h"
#include "messages.h"
int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
{
switch(in_oplock_level) {
case SMB2_OPLOCK_LEVEL_NONE:
return NO_OPLOCK;
case SMB2_OPLOCK_LEVEL_II:
return LEVEL_II_OPLOCK;
case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
return EXCLUSIVE_OPLOCK;
case SMB2_OPLOCK_LEVEL_BATCH:
return BATCH_OPLOCK;
case SMB2_OPLOCK_LEVEL_LEASE:
return LEASE_OPLOCK;
default:
DEBUG(2,("map_smb2_oplock_levels_to_samba: "
"unknown level %u\n",
(unsigned int)in_oplock_level));
return NO_OPLOCK;
}
}
static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
{
if (BATCH_OPLOCK_TYPE(oplock_type)) {
return SMB2_OPLOCK_LEVEL_BATCH;
} else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
} else if (oplock_type == LEVEL_II_OPLOCK) {
return SMB2_OPLOCK_LEVEL_II;
} else if (oplock_type == LEASE_OPLOCK) {
return SMB2_OPLOCK_LEVEL_LEASE;
} else {
return SMB2_OPLOCK_LEVEL_NONE;
}
}
static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint8_t in_oplock_level,
uint32_t in_impersonation_level,
uint32_t in_desired_access,
uint32_t in_file_attributes,
uint32_t in_share_access,
uint32_t in_create_disposition,
uint32_t in_create_options,
const char *in_name,
struct smb2_create_blobs in_context_blobs);
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t *out_oplock_level,
uint32_t *out_create_action,
struct timespec *out_creation_ts,
struct timespec *out_last_access_ts,
struct timespec *out_last_write_ts,
struct timespec *out_change_ts,
uint64_t *out_allocation_size,
uint64_t *out_end_of_file,
uint32_t *out_file_attributes,
uint64_t *out_file_id_persistent,
uint64_t *out_file_id_volatile,
struct smb2_create_blobs *out_context_blobs);
static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
{
const uint8_t *inbody;
const struct iovec *indyniov;
uint8_t in_oplock_level;
uint32_t in_impersonation_level;
uint32_t in_desired_access;
uint32_t in_file_attributes;
uint32_t in_share_access;
uint32_t in_create_disposition;
uint32_t in_create_options;
uint16_t in_name_offset;
uint16_t in_name_length;
DATA_BLOB in_name_buffer;
char *in_name_string;
size_t in_name_string_size;
uint32_t name_offset = 0;
uint32_t name_available_length = 0;
uint32_t in_context_offset;
uint32_t in_context_length;
DATA_BLOB in_context_buffer;
struct smb2_create_blobs in_context_blobs;
uint32_t context_offset = 0;
uint32_t context_available_length = 0;
uint32_t dyn_offset;
NTSTATUS status;
bool ok;
struct tevent_req *tsubreq;
status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(smb2req, status);
}
inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
in_oplock_level = CVAL(inbody, 0x03);
in_impersonation_level = IVAL(inbody, 0x04);
in_desired_access = IVAL(inbody, 0x18);
in_file_attributes = IVAL(inbody, 0x1C);
in_share_access = IVAL(inbody, 0x20);
in_create_disposition = IVAL(inbody, 0x24);
in_create_options = IVAL(inbody, 0x28);
in_name_offset = SVAL(inbody, 0x2C);
in_name_length = SVAL(inbody, 0x2E);
in_context_offset = IVAL(inbody, 0x30);
in_context_length = IVAL(inbody, 0x34);
/*
* First check if the dynamic name and context buffers
* are correctly specified.
*
* Note: That we don't check if the name and context buffers
* overlap
*/
dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
if (in_name_offset == 0 && in_name_length == 0) {
/* This is ok */
name_offset = 0;
} else if (in_name_offset < dyn_offset) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
} else {
name_offset = in_name_offset - dyn_offset;
}
indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
if (name_offset > indyniov->iov_len) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
name_available_length = indyniov->iov_len - name_offset;
if (in_name_length > name_available_length) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
in_name_buffer.length = in_name_length;
if (in_context_offset == 0 && in_context_length == 0) {
/* This is ok */
context_offset = 0;
} else if (in_context_offset < dyn_offset) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
} else {
context_offset = in_context_offset - dyn_offset;
}
if (context_offset > indyniov->iov_len) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
context_available_length = indyniov->iov_len - context_offset;
if (in_context_length > context_available_length) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
in_context_buffer.data = (uint8_t *)indyniov->iov_base +
context_offset;
in_context_buffer.length = in_context_length;
/*
* Now interpret the name and context buffers
*/
ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
in_name_buffer.data,
in_name_buffer.length,
&in_name_string,
&in_name_string_size);
if (!ok) {
return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
}
if (in_name_buffer.length == 0) {
in_name_string_size = 0;
}
if (strlen(in_name_string) != in_name_string_size) {
return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
}
ZERO_STRUCT(in_context_blobs);
status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(smb2req, status);
}
tsubreq = smbd_smb2_create_send(smb2req,
smb2req->sconn->ev_ctx,
smb2req,
in_oplock_level,
in_impersonation_level,
in_desired_access,
in_file_attributes,
in_share_access,
in_create_disposition,
in_create_options,
in_name_string,
in_context_blobs);
if (tsubreq == NULL) {
smb2req->subreq = NULL;
return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
}
tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
return smbd_smb2_request_pending_queue(smb2req, tsubreq, 500);
}
static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
{
uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
}
static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
{
struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
struct smbd_smb2_request);
DATA_BLOB outbody;
DATA_BLOB outdyn;
uint8_t out_oplock_level = 0;
uint32_t out_create_action = 0;
connection_struct *conn = smb2req->tcon->compat;
struct timespec out_creation_ts = { 0, };
struct timespec out_last_access_ts = { 0, };
struct timespec out_last_write_ts = { 0, };
struct timespec out_change_ts = { 0, };
uint64_t out_allocation_size = 0;
uint64_t out_end_of_file = 0;
uint32_t out_file_attributes = 0;
uint64_t out_file_id_persistent = 0;
uint64_t out_file_id_volatile = 0;
struct smb2_create_blobs out_context_blobs;
DATA_BLOB out_context_buffer;
uint16_t out_context_buffer_offset = 0;
NTSTATUS status;
NTSTATUS error; /* transport error */
status = smbd_smb2_create_recv(tsubreq,
smb2req,
&out_oplock_level,
&out_create_action,
&out_creation_ts,
&out_last_access_ts,
&out_last_write_ts,
&out_change_ts,
&out_allocation_size,
&out_end_of_file,
&out_file_attributes,
&out_file_id_persistent,
&out_file_id_volatile,
&out_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(smb2req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(error));
return;
}
return;
}
status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(smb2req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(error));
return;
}
return;
}
if (out_context_buffer.length > 0) {
out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
}
outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(error));
return;
}
return;
}
SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
SCVAL(outbody.data, 0x02,
out_oplock_level); /* oplock level */
SCVAL(outbody.data, 0x03, 0); /* reserved */
SIVAL(outbody.data, 0x04,
out_create_action); /* create action */
put_long_date_timespec(conn->ts_res,
(char *)outbody.data + 0x08,
out_creation_ts); /* creation time */
put_long_date_timespec(conn->ts_res,
(char *)outbody.data + 0x10,
out_last_access_ts); /* last access time */
put_long_date_timespec(conn->ts_res,
(char *)outbody.data + 0x18,
out_last_write_ts); /* last write time */
put_long_date_timespec(conn->ts_res,
(char *)outbody.data + 0x20,
out_change_ts); /* change time */
SBVAL(outbody.data, 0x28,
out_allocation_size); /* allocation size */
SBVAL(outbody.data, 0x30,
out_end_of_file); /* end of file */
SIVAL(outbody.data, 0x38,
out_file_attributes); /* file attributes */
SIVAL(outbody.data, 0x3C, 0); /* reserved */
SBVAL(outbody.data, 0x40,
out_file_id_persistent); /* file id (persistent) */
SBVAL(outbody.data, 0x48,
out_file_id_volatile); /* file id (volatile) */
SIVAL(outbody.data, 0x50,
out_context_buffer_offset); /* create contexts offset */
SIVAL(outbody.data, 0x54,
out_context_buffer.length); /* create contexts length */
outdyn = out_context_buffer;
error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(error));
return;
}
}
static bool smb2_lease_key_valid(const struct smb2_lease_key *key)
{
return ((key->data[0] != 0) || (key->data[1] != 0));
}
static NTSTATUS smbd_smb2_create_durable_lease_check(struct smb_request *smb1req,
const char *requested_filename, const struct files_struct *fsp,
const struct smb2_lease *lease_ptr)
{
struct smb_filename *smb_fname = NULL;
uint32_t ucf_flags;
NTSTATUS status;
if (lease_ptr == NULL) {
if (fsp->oplock_type != LEASE_OPLOCK) {
return NT_STATUS_OK;
}
DEBUG(10, ("Reopened file has lease, but no lease "
"requested\n"));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (fsp->oplock_type != LEASE_OPLOCK) {
DEBUG(10, ("Lease requested, but reopened file has no "
"lease\n"));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (!smb2_lease_key_equal(&lease_ptr->lease_key,
&fsp->lease->lease.lease_key)) {
DEBUG(10, ("Different lease key requested than found "
"in reopened file\n"));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
ucf_flags = filename_create_ucf_flags(smb1req, FILE_OPEN);
status = filename_convert(talloc_tos(), fsp->conn, false,
requested_filename, ucf_flags,
NULL, &smb_fname);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("filename_convert returned %s\n",
nt_errstr(status)));
return status;
}
if (!strequal(fsp->fsp_name->base_name, smb_fname->base_name)) {
DEBUG(10, ("Lease requested for file %s, reopened file "
"is named %s\n", smb_fname->base_name,
fsp->fsp_name->base_name));
TALLOC_FREE(smb_fname);
return NT_STATUS_INVALID_PARAMETER;
}
TALLOC_FREE(smb_fname);
return NT_STATUS_OK;
}
struct smbd_smb2_create_state {
struct smbd_smb2_request *smb2req;
struct smb_request *smb1req;
bool open_was_deferred;
struct tevent_timer *te;
struct tevent_immediate *im;
struct timeval request_time;
struct file_id id;
struct deferred_open_record *open_rec;
uint8_t out_oplock_level;
uint32_t out_create_action;
struct timespec out_creation_ts;
struct timespec out_last_access_ts;
struct timespec out_last_write_ts;
struct timespec out_change_ts;
uint64_t out_allocation_size;
uint64_t out_end_of_file;
uint32_t out_file_attributes;
uint64_t out_file_id_persistent;
uint64_t out_file_id_volatile;
struct smb2_create_blobs *out_context_blobs;
};
static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint8_t in_oplock_level,
uint32_t in_impersonation_level,
uint32_t in_desired_access,
uint32_t in_file_attributes,
uint32_t in_share_access,
uint32_t in_create_disposition,
uint32_t in_create_options,
const char *in_name,
struct smb2_create_blobs in_context_blobs)
{
struct tevent_req *req = NULL;
struct smbd_smb2_create_state *state = NULL;
NTSTATUS status;
struct smb_request *smb1req = NULL;
files_struct *result = NULL;
int info;
int requested_oplock_level;
struct smb2_create_blob *dhnc = NULL;
struct smb2_create_blob *dh2c = NULL;
struct smb2_create_blob *dhnq = NULL;
struct smb2_create_blob *dh2q = NULL;
struct smb2_create_blob *rqls = NULL;
bool replay_operation = false;
if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
} else {
requested_oplock_level = in_oplock_level;
}
if (smb2req->subreq == NULL) {
/* New create call. */
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_create_state);
if (req == NULL) {
return NULL;
}
state->smb2req = smb2req;
smb1req = smbd_smb2_fake_smb_request(smb2req);
if (tevent_req_nomem(smb1req, req)) {
return tevent_req_post(req, ev);
}
state->smb1req = smb1req;
smb2req->subreq = req;
DEBUG(10,("smbd_smb2_create: name[%s]\n",
in_name));
} else {
/* Re-entrant create call. */
req = smb2req->subreq;
state = tevent_req_data(req,
struct smbd_smb2_create_state);
smb1req = state->smb1req;
TALLOC_FREE(state->out_context_blobs);
DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
in_name ));
}
state->out_context_blobs = talloc_zero(state, struct smb2_create_blobs);
if (tevent_req_nomem(state->out_context_blobs, req)) {
return tevent_req_post(req, ev);
}
dhnq = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DHNQ);
dhnc = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DHNC);
dh2q = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DH2Q);
dh2c = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DH2C);
if (smb2req->xconn->smb2.server.capabilities & SMB2_CAP_LEASING) {
rqls = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_RQLS);
}
if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
(dh2q && dh2c))
{
/* not both are allowed at the same time */
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (dhnc) {
uint32_t num_blobs_allowed;
if (dhnc->data.length != 16) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* According to MS-SMB2: 3.3.5.9.7, "Handling the
* SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
* we should ignore an additional dhnq blob, but fail
* the request (with status OBJECT_NAME_NOT_FOUND) if
* any other extra create blob has been provided.
*
* (Note that the cases of an additional dh2q or dh2c blob
* which require a different error code, have been treated
* above.)
*/
if (dhnq) {
num_blobs_allowed = 2;
} else {
num_blobs_allowed = 1;
}
if (rqls != NULL) {
num_blobs_allowed += 1;
}
if (in_context_blobs.num_blobs != num_blobs_allowed) {
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
}
if (dh2c) {
uint32_t num_blobs_allowed;
if (dh2c->data.length != 36) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* According to MS-SMB2: 3.3.5.9.12, "Handling the
* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
* we should fail the request with status
* OBJECT_NAME_NOT_FOUND if any other create blob has been
* provided.
*
* (Note that the cases of an additional dhnq, dhnc or dh2q
* blob which require a different error code, have been
* treated above.)
*/
num_blobs_allowed = 1;
if (rqls != NULL) {
num_blobs_allowed += 1;
}
if (in_context_blobs.num_blobs != num_blobs_allowed) {
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
}
if (IS_IPC(smb1req->conn)) {
const char *pipe_name = in_name;
if (dhnc || dh2c) {
/* durable handles are not supported on IPC$ */
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
if (!lp_nt_pipe_support()) {
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return tevent_req_post(req, ev);
}
status = open_np_file(smb1req, pipe_name, &result);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
info = FILE_WAS_OPENED;
} else if (CAN_PRINT(smb1req->conn)) {
if (dhnc || dh2c) {
/* durable handles are not supported on printers */
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
status = file_new(smb1req, smb1req->conn, &result);
if(!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
status = print_spool_open(result, in_name,
smb1req->vuid);
if (!NT_STATUS_IS_OK(status)) {
file_free(smb1req, result);
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
info = FILE_WAS_CREATED;
} else {
char *fname;
struct smb2_create_blob *exta = NULL;
struct ea_list *ea_list = NULL;
struct smb2_create_blob *mxac = NULL;
NTTIME max_access_time = 0;
struct smb2_create_blob *secd = NULL;
struct security_descriptor *sec_desc = NULL;
struct smb2_create_blob *alsi = NULL;
uint64_t allocation_size = 0;
struct smb2_create_blob *twrp = NULL;
struct smb2_create_blob *qfid = NULL;
struct GUID _create_guid = GUID_zero();
struct GUID *create_guid = NULL;
bool update_open = false;
bool durable_requested = false;
uint32_t durable_timeout_msec = 0;
bool do_durable_reconnect = false;
uint64_t persistent_id = 0;
struct smb2_lease lease;
struct smb2_lease *lease_ptr = NULL;
ssize_t lease_len = -1;
bool need_replay_cache = false;
struct smbXsrv_open *op = NULL;
#if 0
struct smb2_create_blob *svhdx = NULL;
#endif
exta = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_EXTA);
mxac = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_MXAC);
secd = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_SECD);
alsi = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_ALSI);
twrp = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_TWRP);
qfid = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_QFID);
#if 0
if (smb2req->xconn->protocol >= PROTOCOL_SMB3_02) {
/*
* This was introduced with SMB3_02
*/
svhdx = smb2_create_blob_find(&in_context_blobs,
SVHDX_OPEN_DEVICE_CONTEXT);
}
#endif
fname = talloc_strdup(state, in_name);
if (tevent_req_nomem(fname, req)) {
return tevent_req_post(req, ev);
}
if (exta) {
if (!lp_ea_support(SNUM(smb2req->tcon->compat))) {
tevent_req_nterror(req,
NT_STATUS_EAS_NOT_SUPPORTED);
return tevent_req_post(req, ev);
}
ea_list = read_nttrans_ea_list(mem_ctx,
(const char *)exta->data.data, exta->data.length);
if (!ea_list) {
DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* NB. When SMB2+ unix extensions are added,
* we need to relax this check in invalid
* names - we used to not do this if
* lp_posix_pathnames() was false.
*/
if (ea_list_has_invalid_name(ea_list)) {
tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
return tevent_req_post(req, ev);
}
}
if (mxac) {
if (mxac->data.length == 0) {
max_access_time = 0;
} else if (mxac->data.length == 8) {
max_access_time = BVAL(mxac->data.data, 0);
} else {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (secd) {
enum ndr_err_code ndr_err;
sec_desc = talloc_zero(state, struct security_descriptor);
if (tevent_req_nomem(sec_desc, req)) {
return tevent_req_post(req, ev);
}
ndr_err = ndr_pull_struct_blob(&secd->data,
sec_desc, sec_desc,
(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
ndr_errstr(ndr_err)));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (dhnq) {
if (dhnq->data.length != 16) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (dh2q) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* durable handle request is processed below.
*/
durable_requested = true;
/*
* Set the timeout to 16 mins.
*
* TODO: test this against Windows 2012
* as the default for durable v2 is 1 min.
*/
durable_timeout_msec = (16*60*1000);
}
if (dh2q) {
const uint8_t *p = dh2q->data.data;
uint32_t durable_v2_timeout = 0;
DATA_BLOB create_guid_blob;
const uint8_t *hdr;
uint32_t flags;
if (dh2q->data.length != 32) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (dhnq) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
durable_v2_timeout = IVAL(p, 0);
create_guid_blob = data_blob_const(p + 16, 16);
status = GUID_from_ndr_blob(&create_guid_blob,
&_create_guid);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
create_guid = &_create_guid;
/*
* we need to store the create_guid later
*/
update_open = true;
/*
* And we need to create a cache for replaying the
* create.
*/
need_replay_cache = true;
/*
* durable handle v2 request processed below
*/
durable_requested = true;
durable_timeout_msec = durable_v2_timeout;
if (durable_timeout_msec == 0) {
/*
* Set the timeout to 1 min as default.
*
* This matches Windows 2012.
*/
durable_timeout_msec = (60*1000);
}
/*
* Check for replay operation.
* Only consider it when we have dh2q.
* If we do not have a replay operation, verify that
* the create_guid is not cached for replay.
*/
hdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
flags = IVAL(hdr, SMB2_HDR_FLAGS);
replay_operation =
flags & SMB2_HDR_FLAG_REPLAY_OPERATION;
status = smb2srv_open_lookup_replay_cache(
smb2req->xconn, create_guid,
0 /* now */, &op);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
replay_operation = false;
} else if (tevent_req_nterror(req, status)) {
DBG_WARNING("smb2srv_open_lookup_replay_cache "
"failed: %s\n", nt_errstr(status));
return tevent_req_post(req, ev);
} else if (!replay_operation) {
/*
* If a create without replay operation flag
* is sent but with a create_guid that is
* currently in the replay cache -- fail.
*/
status = NT_STATUS_DUPLICATE_OBJECTID;
(void)tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if (dhnc) {
persistent_id = BVAL(dhnc->data.data, 0);
do_durable_reconnect = true;
}
if (dh2c) {
const uint8_t *p = dh2c->data.data;
DATA_BLOB create_guid_blob;
persistent_id = BVAL(p, 0);
create_guid_blob = data_blob_const(p + 16, 16);
status = GUID_from_ndr_blob(&create_guid_blob,
&_create_guid);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
create_guid = &_create_guid;
do_durable_reconnect = true;
}
if (alsi) {
if (alsi->data.length != 8) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
allocation_size = BVAL(alsi->data.data, 0);
}
if (twrp) {
NTTIME nttime;
time_t t;
struct tm *tm;
if (twrp->data.length != 8) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
nttime = BVAL(twrp->data.data, 0);
t = nt_time_to_unix(nttime);
tm = gmtime(&t);
TALLOC_FREE(fname);
fname = talloc_asprintf(state,
"%s\\@GMT-%04u.%02u.%02u-%02u.%02u.%02u",
in_name,
tm->tm_year + 1900,
tm->tm_mon + 1,
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec);
if (tevent_req_nomem(fname, req)) {
return tevent_req_post(req, ev);
}
}
if (qfid) {
if (qfid->data.length != 0) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (rqls) {
lease_len = smb2_lease_pull(
rqls->data.data, rqls->data.length, &lease);
if (lease_len == -1) {
tevent_req_nterror(
req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
lease_ptr = &lease;
if (DEBUGLEVEL >= 10) {
DEBUG(10, ("Got lease request size %d\n",
(int)lease_len));
NDR_PRINT_DEBUG(smb2_lease, lease_ptr);
}
if (!smb2_lease_key_valid(&lease.lease_key)) {
lease_ptr = NULL;
requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
}
if ((smb2req->xconn->protocol < PROTOCOL_SMB3_00) &&
(lease.lease_version != 1)) {
DEBUG(10, ("v2 lease key only for SMB3\n"));
lease_ptr = NULL;
}
/*
* Replay with a lease is only allowed if the
* established open carries a lease with the
* same lease key.
*/
if (replay_operation) {
struct smb2_lease *op_ls =
&op->compat->lease->lease;
int op_oplock = op->compat->oplock_type;
if (map_samba_oplock_levels_to_smb2(op_oplock)
!= SMB2_OPLOCK_LEVEL_LEASE)
{
status = NT_STATUS_ACCESS_DENIED;
(void)tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
if (!smb2_lease_key_equal(&lease.lease_key,
&op_ls->lease_key))
{
status = NT_STATUS_ACCESS_DENIED;
(void)tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
}
/* these are ignored for SMB2 */
in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
/*
* For the backend file open procedure, there are
* three possible modes: replay operation (in which case
* there is nothing else to do), durable_reconnect or
* new open.
*/
if (replay_operation) {
result = op->compat;
result->op = op;
update_open = false;
info = op->create_action;
} else if (do_durable_reconnect) {
DATA_BLOB new_cookie = data_blob_null;
NTTIME now = timeval_to_nttime(&smb2req->request_time);
status = smb2srv_open_recreate(smb2req->xconn,
smb1req->conn->session_info,
persistent_id, create_guid,
now, &op);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("smbd_smb2_create_send: "
"smb2srv_open_recreate failed: %s\n",
nt_errstr(status)));
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
DEBUG(10, ("smb2_create_send: %s to recreate the "
"smb2srv_open struct for a durable handle.\n",
op->global->durable ? "succeded" : "failed"));
if (!op->global->durable) {
talloc_free(op);
tevent_req_nterror(req,
NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
smb1req,
op, /* smbXsrv_open input */
op->global->backend_cookie,
op, /* TALLOC_CTX */
&result, &new_cookie);
if (!NT_STATUS_IS_OK(status)) {
NTSTATUS return_status;
return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
DEBUG(3, ("smbd_smb2_create_send: "
"durable_reconnect failed: %s => %s\n",
nt_errstr(status),
nt_errstr(return_status)));
tevent_req_nterror(req, return_status);
return tevent_req_post(req, ev);
}
DEBUG(10, ("result->oplock_type=%u, lease_ptr==%p\n",
(unsigned)result->oplock_type, lease_ptr));
status = smbd_smb2_create_durable_lease_check(
smb1req, fname, result, lease_ptr);
if (!NT_STATUS_IS_OK(status)) {
close_file(smb1req, result, SHUTDOWN_CLOSE);
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
data_blob_free(&op->global->backend_cookie);
op->global->backend_cookie = new_cookie;
op->status = NT_STATUS_OK;
op->global->disconnect_time = 0;
/* save the timout for later update */
durable_timeout_msec = op->global->durable_timeout_msec;
update_open = true;
info = FILE_WAS_OPENED;
} else {
struct smb_filename *smb_fname = NULL;
uint32_t ucf_flags;
if (requested_oplock_level == SMB2_OPLOCK_LEVEL_LEASE) {
if (lease_ptr == NULL) {
requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
}
} else {
lease_ptr = NULL;
}
/*
* For a DFS path the function parse_dfs_path()
* will do the path processing.
*/
if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
/* convert '\\' into '/' */
status = check_path_syntax(fname);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
ucf_flags = filename_create_ucf_flags(smb1req, in_create_disposition);
status = filename_convert(req,
smb1req->conn,
smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
fname,
ucf_flags,
NULL, /* ppath_contains_wcards */
&smb_fname);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
/*
* MS-SMB2: 2.2.13 SMB2 CREATE Request
* ImpersonationLevel ... MUST contain one of the
* following values. The server MUST validate this
* field, but otherwise ignore it.
*
* NB. The source4/torture/smb2/durable_open.c test
* shows this check is only done on real opens, not
* on durable handle-reopens.
*/
if (in_impersonation_level >
SMB2_IMPERSONATION_DELEGATE) {
tevent_req_nterror(req,
NT_STATUS_BAD_IMPERSONATION_LEVEL);
return tevent_req_post(req, ev);
}
/*
* We know we're going to do a local open, so now
* we must be protocol strict. JRA.
*
* MS-SMB2: 3.3.5.9 - Receiving an SMB2 CREATE Request
* If the file name length is greater than zero and the
* first character is a path separator character, the
* server MUST fail the request with
* STATUS_INVALID_PARAMETER.
*/
if (in_name[0] == '\\' || in_name[0] == '/') {
tevent_req_nterror(req,
NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
status = SMB_VFS_CREATE_FILE(smb1req->conn,
smb1req,
0, /* root_dir_fid */
smb_fname,
in_desired_access,
in_share_access,
in_create_disposition,
in_create_options,
in_file_attributes,
map_smb2_oplock_levels_to_samba(requested_oplock_level),
lease_ptr,
allocation_size,
0, /* private_flags */
sec_desc,
ea_list,
&result,
&info,
&in_context_blobs,
state->out_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
if (open_was_deferred(smb1req->xconn, smb1req->mid)) {
SMBPROFILE_IOBYTES_ASYNC_SET_IDLE(smb2req->profile);
return req;
}
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
op = result->op;
}
/*
* here we have op == result->op
*/
DEBUG(10, ("smbd_smb2_create_send: "
"response construction phase\n"));
if (mxac) {
NTTIME last_write_time;
last_write_time = unix_timespec_to_nt_time(
result->fsp_name->st.st_ex_mtime);
if (last_write_time != max_access_time) {
uint8_t p[8];
uint32_t max_access_granted;
DATA_BLOB blob = data_blob_const(p, sizeof(p));
status = smbd_calculate_access_mask(smb1req->conn,
result->fsp_name,
false,
SEC_FLAG_MAXIMUM_ALLOWED,
&max_access_granted);
SIVAL(p, 0, NT_STATUS_V(status));
SIVAL(p, 4, max_access_granted);
status = smb2_create_blob_add(
state->out_context_blobs,
state->out_context_blobs,
SMB2_CREATE_TAG_MXAC,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
}
if (!replay_operation && durable_requested &&
(fsp_lease_type(result) & SMB2_LEASE_HANDLE))
{
status = SMB_VFS_DURABLE_COOKIE(result,
op,
&op->global->backend_cookie);
if (!NT_STATUS_IS_OK(status)) {
op->global->backend_cookie = data_blob_null;
}
}
if (!replay_operation && op->global->backend_cookie.length > 0)
{
update_open = true;
op->global->durable = true;
op->global->durable_timeout_msec = durable_timeout_msec;
}
if (update_open) {
op->global->create_guid = _create_guid;
if (need_replay_cache) {
op->flags |= SMBXSRV_OPEN_NEED_REPLAY_CACHE;
}
status = smbXsrv_open_update(op);
DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
"returned %s\n",
nt_errstr(status)));
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if (dhnq && op->global->durable) {
uint8_t p[8] = { 0, };
DATA_BLOB blob = data_blob_const(p, sizeof(p));
status = smb2_create_blob_add(state->out_context_blobs,
state->out_context_blobs,
SMB2_CREATE_TAG_DHNQ,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if (dh2q && op->global->durable &&
/*
* For replay operations, we return the dh2q blob
* in the case of oplocks not based on the state of
* the open, but on whether it could have been granted
* for the request data. In the case of leases instead,
* the state of the open is used...
*/
(!replay_operation ||
in_oplock_level == SMB2_OPLOCK_LEVEL_BATCH ||
in_oplock_level == SMB2_OPLOCK_LEVEL_LEASE))
{
uint8_t p[8] = { 0, };
DATA_BLOB blob = data_blob_const(p, sizeof(p));
uint32_t durable_v2_response_flags = 0;
SIVAL(p, 0, op->global->durable_timeout_msec);
SIVAL(p, 4, durable_v2_response_flags);
status = smb2_create_blob_add(state->out_context_blobs,
state->out_context_blobs,
SMB2_CREATE_TAG_DH2Q,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if (qfid) {
uint8_t p[32];
uint64_t file_index = get_FileIndex(result->conn,
&result->fsp_name->st);
DATA_BLOB blob = data_blob_const(p, sizeof(p));
ZERO_STRUCT(p);
/* From conversations with Microsoft engineers at
the MS plugfest. The first 8 bytes are the "volume index"
== inode, the second 8 bytes are the "volume id",
== dev. This will be updated in the SMB2 doc. */
SBVAL(p, 0, file_index);
SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
status = smb2_create_blob_add(state->out_context_blobs,
state->out_context_blobs,
SMB2_CREATE_TAG_QFID,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if ((rqls != NULL) && (result->oplock_type == LEASE_OPLOCK)) {
uint8_t buf[52];
lease = result->lease->lease;
lease_len = sizeof(buf);
if (lease.lease_version == 1) {
lease_len = 32;
}
if (!smb2_lease_push(&lease, buf, lease_len)) {
tevent_req_nterror(
req, NT_STATUS_INTERNAL_ERROR);
return tevent_req_post(req, ev);
}
status = smb2_create_blob_add(
state, state->out_context_blobs,
SMB2_CREATE_TAG_RQLS,
data_blob_const(buf, lease_len));
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
}
smb2req->compat_chain_fsp = smb1req->chain_fsp;
if (replay_operation) {
state->out_oplock_level = in_oplock_level;
} else if (lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
state->out_oplock_level = in_oplock_level;
} else {
state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
}
if ((in_create_disposition == FILE_SUPERSEDE)
&& (info == FILE_WAS_OVERWRITTEN)) {
state->out_create_action = FILE_WAS_SUPERSEDED;
} else {
state->out_create_action = info;
}
result->op->create_action = state->out_create_action;
state->out_file_attributes = dos_mode(result->conn,
result->fsp_name);
state->out_creation_ts = get_create_timespec(smb1req->conn,
result, result->fsp_name);
state->out_last_access_ts = result->fsp_name->st.st_ex_atime;
state->out_last_write_ts = result->fsp_name->st.st_ex_mtime;
state->out_change_ts = get_change_timespec(smb1req->conn,
result, result->fsp_name);
if (lp_dos_filetime_resolution(SNUM(smb2req->tcon->compat))) {
dos_filetime_timespec(&state->out_creation_ts);
dos_filetime_timespec(&state->out_last_access_ts);
dos_filetime_timespec(&state->out_last_write_ts);
dos_filetime_timespec(&state->out_change_ts);
}
state->out_allocation_size =
SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
&(result->fsp_name->st));
state->out_end_of_file = result->fsp_name->st.st_ex_size;
if (state->out_file_attributes == 0) {
state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
}
state->out_file_id_persistent = result->op->global->open_persistent_id;
state->out_file_id_volatile = result->op->global->open_volatile_id;
DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
fsp_str_dbg(result), fsp_fnum_dbg(result)));
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t *out_oplock_level,
uint32_t *out_create_action,
struct timespec *out_creation_ts,
struct timespec *out_last_access_ts,
struct timespec *out_last_write_ts,
struct timespec *out_change_ts,
uint64_t *out_allocation_size,
uint64_t *out_end_of_file,
uint32_t *out_file_attributes,
uint64_t *out_file_id_persistent,
uint64_t *out_file_id_volatile,
struct smb2_create_blobs *out_context_blobs)
{
NTSTATUS status;
struct smbd_smb2_create_state *state = tevent_req_data(req,
struct smbd_smb2_create_state);
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_oplock_level = state->out_oplock_level;
*out_create_action = state->out_create_action;
*out_creation_ts = state->out_creation_ts;
*out_last_access_ts = state->out_last_access_ts;
*out_last_write_ts = state->out_last_write_ts;
*out_change_ts = state->out_change_ts;
*out_allocation_size = state->out_allocation_size;
*out_end_of_file = state->out_end_of_file;
*out_file_attributes = state->out_file_attributes;
*out_file_id_persistent = state->out_file_id_persistent;
*out_file_id_volatile = state->out_file_id_volatile;
*out_context_blobs = *(state->out_context_blobs);
talloc_steal(mem_ctx, state->out_context_blobs->blobs);
tevent_req_received(req);
return NT_STATUS_OK;
}
/*********************************************************
Code for dealing with deferred opens.
*********************************************************/
bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
struct timeval *p_request_time,
struct deferred_open_record **open_rec)
{
struct smbd_smb2_create_state *state = NULL;
struct tevent_req *req = NULL;
if (!smb2req) {
return false;
}
req = smb2req->subreq;
if (!req) {
return false;
}
state = tevent_req_data(req, struct smbd_smb2_create_state);
if (!state) {
return false;
}
if (!state->open_was_deferred) {
return false;
}
if (p_request_time) {
*p_request_time = state->request_time;
}
if (open_rec != NULL) {
*open_rec = state->open_rec;
}
return true;
}
/*********************************************************
Re-process this call early - requested by message or
close.
*********************************************************/
static struct smbd_smb2_request *find_open_smb2req(
struct smbXsrv_connection *xconn, uint64_t mid)
{
struct smbd_smb2_request *smb2req;
for (smb2req = xconn->smb2.requests; smb2req; smb2req = smb2req->next) {
uint64_t message_id;
if (smb2req->subreq == NULL) {
/* This message has been processed. */
continue;
}
if (!tevent_req_is_in_progress(smb2req->subreq)) {
/* This message has been processed. */
continue;
}
message_id = get_mid_from_smb2req(smb2req);
if (message_id == mid) {
return smb2req;
}
}
return NULL;
}
bool open_was_deferred_smb2(struct smbXsrv_connection *xconn, uint64_t mid)
{
struct smbd_smb2_create_state *state = NULL;
struct smbd_smb2_request *smb2req;
smb2req = find_open_smb2req(xconn, mid);
if (!smb2req) {
DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
(unsigned long long)mid));
return false;
}
if (!smb2req->subreq) {
return false;
}
if (!tevent_req_is_in_progress(smb2req->subreq)) {
return false;
}
state = tevent_req_data(smb2req->subreq,
struct smbd_smb2_create_state);
if (!state) {
return false;
}
/* It's not in progress if there's no timeout event. */
if (!state->open_was_deferred) {
return false;
}
DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
(unsigned long long)mid));
return true;
}
static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
uint64_t mid)
{
struct smbd_smb2_create_state *state = NULL;
if (!smb2req->subreq) {
return;
}
if (!tevent_req_is_in_progress(smb2req->subreq)) {
return;
}
state = tevent_req_data(smb2req->subreq,
struct smbd_smb2_create_state);
if (!state) {
return;
}
DEBUG(10,("remove_deferred_open_message_smb2_internal: "
"mid %llu\n",
(unsigned long long)mid ));
state->open_was_deferred = false;
/* Ensure we don't have any outstanding timer event. */
TALLOC_FREE(state->te);
/* Ensure we don't have any outstanding immediate event. */
TALLOC_FREE(state->im);
}
void remove_deferred_open_message_smb2(
struct smbXsrv_connection *xconn, uint64_t mid)
{
struct smbd_smb2_request *smb2req;
smb2req = find_open_smb2req(xconn, mid);
if (!smb2req) {
DEBUG(10,("remove_deferred_open_message_smb2: "
"can't find mid %llu\n",
(unsigned long long)mid ));
return;
}
remove_deferred_open_message_smb2_internal(smb2req, mid);
}
static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
struct tevent_immediate *im,
void *private_data)
{
struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
struct smbd_smb2_request);
uint64_t mid = get_mid_from_smb2req(smb2req);
NTSTATUS status;
DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
"re-dispatching mid %llu\n",
(unsigned long long)mid ));
status = smbd_smb2_request_dispatch(smb2req);
if (!NT_STATUS_IS_OK(status)) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(status));
return;
}
}
bool schedule_deferred_open_message_smb2(
struct smbXsrv_connection *xconn, uint64_t mid)
{
struct smbd_smb2_create_state *state = NULL;
struct smbd_smb2_request *smb2req;
smb2req = find_open_smb2req(xconn, mid);
if (!smb2req) {
DEBUG(10,("schedule_deferred_open_message_smb2: "
"can't find mid %llu\n",
(unsigned long long)mid ));
return false;
}
if (!smb2req->subreq) {
return false;
}
if (!tevent_req_is_in_progress(smb2req->subreq)) {
return false;
}
state = tevent_req_data(smb2req->subreq,
struct smbd_smb2_create_state);
if (!state) {
return false;
}
/* Ensure we don't have any outstanding timer event. */
TALLOC_FREE(state->te);
/* Ensure we don't have any outstanding immediate event. */
TALLOC_FREE(state->im);
/*
* This is subtle. We must null out the callback
* before rescheduling, else the first call to
* tevent_req_nterror() causes the _receive()
* function to be called, this causing tevent_req_post()
* to crash.
*/
tevent_req_set_callback(smb2req->subreq, NULL, NULL);
state->im = tevent_create_immediate(smb2req);
if (!state->im) {
smbd_server_connection_terminate(smb2req->xconn,
nt_errstr(NT_STATUS_NO_MEMORY));
return false;
}
DEBUG(10,("schedule_deferred_open_message_smb2: "
"re-processing mid %llu\n",
(unsigned long long)mid ));
tevent_schedule_immediate(state->im,
smb2req->sconn->ev_ctx,
smbd_smb2_create_request_dispatch_immediate,
smb2req);
return true;
}
static bool smbd_smb2_create_cancel(struct tevent_req *req)
{
struct smbd_smb2_request *smb2req = NULL;
struct smbd_smb2_create_state *state = tevent_req_data(req,
struct smbd_smb2_create_state);
uint64_t mid;
if (!state) {
return false;
}
if (!state->smb2req) {
return false;
}
smb2req = state->smb2req;
mid = get_mid_from_smb2req(smb2req);
if (is_deferred_open_async(state->open_rec)) {
/* Can't cancel an async create. */
return false;
}
remove_deferred_open_message_smb2_internal(smb2req, mid);
tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
tevent_req_nterror(req, NT_STATUS_CANCELLED);
return true;
}
bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
struct timeval request_time,
struct timeval timeout,
struct file_id id,
struct deferred_open_record *open_rec)
{
struct tevent_req *req = NULL;
struct smbd_smb2_create_state *state = NULL;
struct timeval end_time;
if (!smb2req) {
return false;
}
req = smb2req->subreq;
if (!req) {
return false;
}
state = tevent_req_data(req, struct smbd_smb2_create_state);
if (!state) {
return false;
}
state->id = id;
state->request_time = request_time;
state->open_rec = talloc_move(state, &open_rec);
/* Re-schedule us to retry on timer expiry. */
end_time = timeval_sum(&request_time, &timeout);
DEBUG(10,("push_deferred_open_message_smb2: "
"timeout at %s\n",
timeval_string(talloc_tos(),
&end_time,
true) ));
state->open_was_deferred = true;
/* allow this request to be canceled */
tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
return true;
}