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samba-mirror/source3/smbd/durable.c
Volker Lendecke 5e4f34e707 smbd: Add some structure protection for durable reconnect
We should consume all data, and the ndr_pull function fills in all
fields. Thus the ZERO_STRUCT(cookie) is not required.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2018-09-14 07:49:13 +02:00

902 lines
25 KiB
C

/*
Unix SMB/CIFS implementation.
Durable Handle default VFS implementation
Copyright (C) Stefan Metzmacher 2012
Copyright (C) Michael Adam 2012
Copyright (C) Volker Lendecke 2012
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 "system/filesys.h"
#include "lib/util/server_id.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "libcli/security/security.h"
#include "messages.h"
#include "librpc/gen_ndr/ndr_open_files.h"
#include "serverid.h"
#include "fake_file.h"
NTSTATUS vfs_default_durable_cookie(struct files_struct *fsp,
TALLOC_CTX *mem_ctx,
DATA_BLOB *cookie_blob)
{
struct connection_struct *conn = fsp->conn;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
if (!lp_durable_handles(SNUM(conn))) {
return NT_STATUS_NOT_SUPPORTED;
}
if (lp_kernel_share_modes(SNUM(conn))) {
/*
* We do not support durable handles
* if kernel share modes (flocks) are used
*/
return NT_STATUS_NOT_SUPPORTED;
}
if (lp_kernel_oplocks(SNUM(conn))) {
/*
* We do not support durable handles
* if kernel oplocks are used
*/
return NT_STATUS_NOT_SUPPORTED;
}
if ((fsp->current_lock_count > 0) &&
lp_posix_locking(fsp->conn->params))
{
/*
* We do not support durable handles
* if the handle has posix locks.
*/
return NT_STATUS_NOT_SUPPORTED;
}
if (fsp->is_directory) {
return NT_STATUS_NOT_SUPPORTED;
}
if (fsp->fh->fd == -1) {
return NT_STATUS_NOT_SUPPORTED;
}
if (is_ntfs_stream_smb_fname(fsp->fsp_name)) {
/*
* We do not support durable handles
* on streams for now.
*/
return NT_STATUS_NOT_SUPPORTED;
}
if (is_fake_file(fsp->fsp_name)) {
/*
* We do not support durable handles
* on fake files.
*/
return NT_STATUS_NOT_SUPPORTED;
}
ZERO_STRUCT(cookie);
cookie.allow_reconnect = false;
cookie.id = fsp->file_id;
cookie.servicepath = conn->connectpath;
cookie.base_name = fsp->fsp_name->base_name;
cookie.initial_allocation_size = fsp->initial_allocation_size;
cookie.position_information = fsp->fh->position_information;
cookie.update_write_time_triggered = fsp->update_write_time_triggered;
cookie.update_write_time_on_close = fsp->update_write_time_on_close;
cookie.write_time_forced = fsp->write_time_forced;
cookie.close_write_time = fsp->close_write_time;
cookie.stat_info.st_ex_dev = fsp->fsp_name->st.st_ex_dev;
cookie.stat_info.st_ex_ino = fsp->fsp_name->st.st_ex_ino;
cookie.stat_info.st_ex_mode = fsp->fsp_name->st.st_ex_mode;
cookie.stat_info.st_ex_nlink = fsp->fsp_name->st.st_ex_nlink;
cookie.stat_info.st_ex_uid = fsp->fsp_name->st.st_ex_uid;
cookie.stat_info.st_ex_gid = fsp->fsp_name->st.st_ex_gid;
cookie.stat_info.st_ex_rdev = fsp->fsp_name->st.st_ex_rdev;
cookie.stat_info.st_ex_size = fsp->fsp_name->st.st_ex_size;
cookie.stat_info.st_ex_atime = fsp->fsp_name->st.st_ex_atime;
cookie.stat_info.st_ex_mtime = fsp->fsp_name->st.st_ex_mtime;
cookie.stat_info.st_ex_ctime = fsp->fsp_name->st.st_ex_ctime;
cookie.stat_info.st_ex_btime = fsp->fsp_name->st.st_ex_btime;
cookie.stat_info.st_ex_calculated_birthtime = fsp->fsp_name->st.st_ex_calculated_birthtime;
cookie.stat_info.st_ex_blksize = fsp->fsp_name->st.st_ex_blksize;
cookie.stat_info.st_ex_blocks = fsp->fsp_name->st.st_ex_blocks;
cookie.stat_info.st_ex_flags = fsp->fsp_name->st.st_ex_flags;
cookie.stat_info.st_ex_mask = fsp->fsp_name->st.st_ex_mask;
ndr_err = ndr_push_struct_blob(cookie_blob, mem_ctx, &cookie,
(ndr_push_flags_fn_t)ndr_push_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
return status;
}
return NT_STATUS_OK;
}
NTSTATUS vfs_default_durable_disconnect(struct files_struct *fsp,
const DATA_BLOB old_cookie,
TALLOC_CTX *mem_ctx,
DATA_BLOB *new_cookie)
{
struct connection_struct *conn = fsp->conn;
NTSTATUS status;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
DATA_BLOB new_cookie_blob = data_blob_null;
struct share_mode_lock *lck;
bool ok;
*new_cookie = data_blob_null;
ZERO_STRUCT(cookie);
ndr_err = ndr_pull_struct_blob(&old_cookie, talloc_tos(), &cookie,
(ndr_pull_flags_fn_t)ndr_pull_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
if (strcmp(cookie.magic, VFS_DEFAULT_DURABLE_COOKIE_MAGIC) != 0) {
return NT_STATUS_INVALID_PARAMETER;
}
if (cookie.version != VFS_DEFAULT_DURABLE_COOKIE_VERSION) {
return NT_STATUS_INVALID_PARAMETER;
}
if (!file_id_equal(&fsp->file_id, &cookie.id)) {
return NT_STATUS_INVALID_PARAMETER;
}
if ((fsp_lease_type(fsp) & SMB2_LEASE_HANDLE) == 0) {
return NT_STATUS_NOT_SUPPORTED;
}
/*
* For now let it be simple and do not keep
* delete on close files durable open
*/
if (fsp->initial_delete_on_close) {
return NT_STATUS_NOT_SUPPORTED;
}
if (fsp->delete_on_close) {
return NT_STATUS_NOT_SUPPORTED;
}
if (!VALID_STAT(fsp->fsp_name->st)) {
return NT_STATUS_NOT_SUPPORTED;
}
if (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) {
return NT_STATUS_NOT_SUPPORTED;
}
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
fsp_flush_write_time_update(fsp);
}
/*
* The above checks are done in mark_share_mode_disconnected() too
* but we want to avoid getting the lock if possible
*/
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck != NULL) {
struct smb_file_time ft;
ZERO_STRUCT(ft);
if (fsp->write_time_forced) {
ft.mtime = lck->data->changed_write_time;
} else if (fsp->update_write_time_on_close) {
if (null_timespec(fsp->close_write_time)) {
ft.mtime = timespec_current();
} else {
ft.mtime = fsp->close_write_time;
}
}
if (!null_timespec(ft.mtime)) {
round_timespec(conn->ts_res, &ft.mtime);
file_ntimes(conn, fsp->fsp_name, &ft);
}
ok = mark_share_mode_disconnected(lck, fsp);
if (!ok) {
TALLOC_FREE(lck);
}
}
if (lck != NULL) {
ok = brl_mark_disconnected(fsp);
if (!ok) {
TALLOC_FREE(lck);
}
}
if (lck == NULL) {
return NT_STATUS_NOT_SUPPORTED;
}
TALLOC_FREE(lck);
status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ZERO_STRUCT(cookie);
cookie.allow_reconnect = true;
cookie.id = fsp->file_id;
cookie.servicepath = conn->connectpath;
cookie.base_name = fsp->fsp_name->base_name;
cookie.initial_allocation_size = fsp->initial_allocation_size;
cookie.position_information = fsp->fh->position_information;
cookie.update_write_time_triggered = fsp->update_write_time_triggered;
cookie.update_write_time_on_close = fsp->update_write_time_on_close;
cookie.write_time_forced = fsp->write_time_forced;
cookie.close_write_time = fsp->close_write_time;
cookie.stat_info.st_ex_dev = fsp->fsp_name->st.st_ex_dev;
cookie.stat_info.st_ex_ino = fsp->fsp_name->st.st_ex_ino;
cookie.stat_info.st_ex_mode = fsp->fsp_name->st.st_ex_mode;
cookie.stat_info.st_ex_nlink = fsp->fsp_name->st.st_ex_nlink;
cookie.stat_info.st_ex_uid = fsp->fsp_name->st.st_ex_uid;
cookie.stat_info.st_ex_gid = fsp->fsp_name->st.st_ex_gid;
cookie.stat_info.st_ex_rdev = fsp->fsp_name->st.st_ex_rdev;
cookie.stat_info.st_ex_size = fsp->fsp_name->st.st_ex_size;
cookie.stat_info.st_ex_atime = fsp->fsp_name->st.st_ex_atime;
cookie.stat_info.st_ex_mtime = fsp->fsp_name->st.st_ex_mtime;
cookie.stat_info.st_ex_ctime = fsp->fsp_name->st.st_ex_ctime;
cookie.stat_info.st_ex_btime = fsp->fsp_name->st.st_ex_btime;
cookie.stat_info.st_ex_calculated_birthtime = fsp->fsp_name->st.st_ex_calculated_birthtime;
cookie.stat_info.st_ex_blksize = fsp->fsp_name->st.st_ex_blksize;
cookie.stat_info.st_ex_blocks = fsp->fsp_name->st.st_ex_blocks;
cookie.stat_info.st_ex_flags = fsp->fsp_name->st.st_ex_flags;
cookie.stat_info.st_ex_mask = fsp->fsp_name->st.st_ex_mask;
ndr_err = ndr_push_struct_blob(&new_cookie_blob, mem_ctx, &cookie,
(ndr_push_flags_fn_t)ndr_push_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
status = fd_close(fsp);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(&new_cookie_blob);
return status;
}
*new_cookie = new_cookie_blob;
return NT_STATUS_OK;
}
/**
* Check whether a cookie-stored struct info is the same
* as a given SMB_STRUCT_STAT, as coming with the fsp.
*/
static bool vfs_default_durable_reconnect_check_stat(
struct vfs_default_durable_stat *cookie_st,
SMB_STRUCT_STAT *fsp_st,
const char *name)
{
int ret;
if (cookie_st->st_ex_mode != fsp_st->st_ex_mode) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_mode",
(unsigned long long)cookie_st->st_ex_mode,
(unsigned long long)fsp_st->st_ex_mode));
return false;
}
if (cookie_st->st_ex_nlink != fsp_st->st_ex_nlink) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_nlink",
(unsigned long long)cookie_st->st_ex_nlink,
(unsigned long long)fsp_st->st_ex_nlink));
return false;
}
if (cookie_st->st_ex_uid != fsp_st->st_ex_uid) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_uid",
(unsigned long long)cookie_st->st_ex_uid,
(unsigned long long)fsp_st->st_ex_uid));
return false;
}
if (cookie_st->st_ex_gid != fsp_st->st_ex_gid) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_gid",
(unsigned long long)cookie_st->st_ex_gid,
(unsigned long long)fsp_st->st_ex_gid));
return false;
}
if (cookie_st->st_ex_rdev != fsp_st->st_ex_rdev) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_rdev",
(unsigned long long)cookie_st->st_ex_rdev,
(unsigned long long)fsp_st->st_ex_rdev));
return false;
}
if (cookie_st->st_ex_size != fsp_st->st_ex_size) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_size",
(unsigned long long)cookie_st->st_ex_size,
(unsigned long long)fsp_st->st_ex_size));
return false;
}
ret = timespec_compare(&cookie_st->st_ex_atime,
&fsp_st->st_ex_atime);
if (ret != 0) {
struct timeval tc, ts;
tc = convert_timespec_to_timeval(cookie_st->st_ex_atime);
ts = convert_timespec_to_timeval(fsp_st->st_ex_atime);
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:'%s' != stat:'%s', "
"denying durable reconnect\n",
name,
"st_ex_atime",
timeval_string(talloc_tos(), &tc, true),
timeval_string(talloc_tos(), &ts, true)));
return false;
}
ret = timespec_compare(&cookie_st->st_ex_mtime,
&fsp_st->st_ex_mtime);
if (ret != 0) {
struct timeval tc, ts;
tc = convert_timespec_to_timeval(cookie_st->st_ex_mtime);
ts = convert_timespec_to_timeval(fsp_st->st_ex_mtime);
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:'%s' != stat:'%s', "
"denying durable reconnect\n",
name,
"st_ex_mtime",
timeval_string(talloc_tos(), &tc, true),
timeval_string(talloc_tos(), &ts, true)));
return false;
}
ret = timespec_compare(&cookie_st->st_ex_ctime,
&fsp_st->st_ex_ctime);
if (ret != 0) {
struct timeval tc, ts;
tc = convert_timespec_to_timeval(cookie_st->st_ex_ctime);
ts = convert_timespec_to_timeval(fsp_st->st_ex_ctime);
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:'%s' != stat:'%s', "
"denying durable reconnect\n",
name,
"st_ex_ctime",
timeval_string(talloc_tos(), &tc, true),
timeval_string(talloc_tos(), &ts, true)));
return false;
}
ret = timespec_compare(&cookie_st->st_ex_btime,
&fsp_st->st_ex_btime);
if (ret != 0) {
struct timeval tc, ts;
tc = convert_timespec_to_timeval(cookie_st->st_ex_btime);
ts = convert_timespec_to_timeval(fsp_st->st_ex_btime);
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:'%s' != stat:'%s', "
"denying durable reconnect\n",
name,
"st_ex_btime",
timeval_string(talloc_tos(), &tc, true),
timeval_string(talloc_tos(), &ts, true)));
return false;
}
if (cookie_st->st_ex_calculated_birthtime !=
fsp_st->st_ex_calculated_birthtime)
{
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_calculated_birthtime",
(unsigned long long)cookie_st->st_ex_calculated_birthtime,
(unsigned long long)fsp_st->st_ex_calculated_birthtime));
return false;
}
if (cookie_st->st_ex_blksize != fsp_st->st_ex_blksize) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_blksize",
(unsigned long long)cookie_st->st_ex_blksize,
(unsigned long long)fsp_st->st_ex_blksize));
return false;
}
if (cookie_st->st_ex_blocks != fsp_st->st_ex_blocks) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_blocks",
(unsigned long long)cookie_st->st_ex_blocks,
(unsigned long long)fsp_st->st_ex_blocks));
return false;
}
if (cookie_st->st_ex_flags != fsp_st->st_ex_flags) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_flags",
(unsigned long long)cookie_st->st_ex_flags,
(unsigned long long)fsp_st->st_ex_flags));
return false;
}
if (cookie_st->st_ex_mask != fsp_st->st_ex_mask) {
DEBUG(1, ("vfs_default_durable_reconnect (%s): "
"stat_ex.%s differs: "
"cookie:%llu != stat:%llu, "
"denying durable reconnect\n",
name,
"st_ex_mask",
(unsigned long long)cookie_st->st_ex_mask,
(unsigned long long)fsp_st->st_ex_mask));
return false;
}
return true;
}
NTSTATUS vfs_default_durable_reconnect(struct connection_struct *conn,
struct smb_request *smb1req,
struct smbXsrv_open *op,
const DATA_BLOB old_cookie,
TALLOC_CTX *mem_ctx,
files_struct **result,
DATA_BLOB *new_cookie)
{
struct share_mode_lock *lck;
struct share_mode_entry *e;
struct files_struct *fsp = NULL;
NTSTATUS status;
bool ok;
int ret;
int flags = 0;
struct file_id file_id;
struct smb_filename *smb_fname = NULL;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
DATA_BLOB new_cookie_blob = data_blob_null;
*result = NULL;
*new_cookie = data_blob_null;
if (!lp_durable_handles(SNUM(conn))) {
return NT_STATUS_NOT_SUPPORTED;
}
/*
* the checks for kernel oplocks
* and similar things are done
* in the vfs_default_durable_cookie()
* call below.
*/
ndr_err = ndr_pull_struct_blob_all(
&old_cookie,
talloc_tos(),
&cookie,
(ndr_pull_flags_fn_t)ndr_pull_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
if (strcmp(cookie.magic, VFS_DEFAULT_DURABLE_COOKIE_MAGIC) != 0) {
return NT_STATUS_INVALID_PARAMETER;
}
if (cookie.version != VFS_DEFAULT_DURABLE_COOKIE_VERSION) {
return NT_STATUS_INVALID_PARAMETER;
}
if (!cookie.allow_reconnect) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (strcmp(cookie.servicepath, conn->connectpath) != 0) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/* Create an smb_filename with stream_name == NULL. */
smb_fname = synthetic_smb_fname(talloc_tos(),
cookie.base_name,
NULL,
NULL,
0);
if (smb_fname == NULL) {
return NT_STATUS_NO_MEMORY;
}
ret = SMB_VFS_LSTAT(conn, smb_fname);
if (ret == -1) {
status = map_nt_error_from_unix_common(errno);
DEBUG(1, ("Unable to lstat stream: %s => %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
return status;
}
if (!S_ISREG(smb_fname->st.st_ex_mode)) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
if (!file_id_equal(&cookie.id, &file_id)) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
* 1. check entry in locking.tdb
*/
lck = get_existing_share_mode_lock(mem_ctx, file_id);
if (lck == NULL) {
DEBUG(5, ("vfs_default_durable_reconnect: share-mode lock "
"not obtained from db\n"));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (lck->data->num_share_modes == 0) {
DEBUG(1, ("vfs_default_durable_reconnect: Error: no share-mode "
"entry in existing share mode lock\n"));
TALLOC_FREE(lck);
return NT_STATUS_INTERNAL_DB_ERROR;
}
if (lck->data->num_share_modes > 1) {
/*
* It can't be durable if there is more than one handle
* on the file.
*/
DEBUG(5, ("vfs_default_durable_reconnect: more than one "
"share-mode entry - can not be durable\n"));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
e = &lck->data->share_modes[0];
if (!server_id_is_disconnected(&e->pid)) {
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"reconnect for handle that was not marked "
"disconnected (e.g. smbd or cluster node died)\n"));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (e->share_file_id != op->global->open_persistent_id) {
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"share_file_id changed %llu != %llu"
"(e.g. another client had opened the file)\n",
(unsigned long long)e->share_file_id,
(unsigned long long)op->global->open_persistent_id));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if ((e->access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) &&
!CAN_WRITE(conn))
{
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"share[%s] is not writeable anymore\n",
lp_servicename(talloc_tos(), SNUM(conn))));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
* 2. proceed with opening file
*/
status = fsp_new(conn, conn, &fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("vfs_default_durable_reconnect: failed to create "
"new fsp: %s\n", nt_errstr(status)));
TALLOC_FREE(lck);
return status;
}
fsp->fh->private_options = e->private_options;
fsp->fh->gen_id = smbXsrv_open_hash(op);
fsp->file_id = file_id;
fsp->file_pid = smb1req->smbpid;
fsp->vuid = smb1req->vuid;
fsp->open_time = e->time;
fsp->access_mask = e->access_mask;
fsp->share_access = e->share_access;
fsp->can_read = ((fsp->access_mask & (FILE_READ_DATA)) != 0);
fsp->can_write = ((fsp->access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) != 0);
fsp->fnum = op->local_id;
/*
* TODO:
* Do we need to store the modified flag in the DB?
*/
fsp->modified = false;
/*
* no durables for directories
*/
fsp->is_directory = false;
/*
* For normal files, can_lock == !is_directory
*/
fsp->can_lock = true;
/*
* We do not support aio write behind for smb2
*/
fsp->aio_write_behind = false;
fsp->oplock_type = e->op_type;
if (fsp->oplock_type == LEASE_OPLOCK) {
struct share_mode_lease *l = &lck->data->leases[e->lease_idx];
struct smb2_lease_key key;
key.data[0] = l->lease_key.data[0];
key.data[1] = l->lease_key.data[1];
fsp->lease = find_fsp_lease(fsp, &key, l);
if (fsp->lease == NULL) {
TALLOC_FREE(lck);
fsp_free(fsp);
return NT_STATUS_NO_MEMORY;
}
/*
* Ensure the existing client guid matches the
* stored one in the share_mode_lease.
*/
if (!GUID_equal(fsp_client_guid(fsp),
&l->client_guid)) {
TALLOC_FREE(lck);
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
}
fsp->initial_allocation_size = cookie.initial_allocation_size;
fsp->fh->position_information = cookie.position_information;
fsp->update_write_time_triggered = cookie.update_write_time_triggered;
fsp->update_write_time_on_close = cookie.update_write_time_on_close;
fsp->write_time_forced = cookie.write_time_forced;
fsp->close_write_time = cookie.close_write_time;
status = fsp_set_smb_fname(fsp, smb_fname);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
fsp_free(fsp);
DEBUG(0, ("vfs_default_durable_reconnect: "
"fsp_set_smb_fname failed: %s\n",
nt_errstr(status)));
return status;
}
op->compat = fsp;
fsp->op = op;
e->pid = messaging_server_id(conn->sconn->msg_ctx);
e->op_mid = smb1req->mid;
e->share_file_id = fsp->fh->gen_id;
ok = brl_reconnect_disconnected(fsp);
if (!ok) {
status = NT_STATUS_INTERNAL_ERROR;
DEBUG(1, ("vfs_default_durable_reconnect: "
"failed to reopen brlocks: %s\n",
nt_errstr(status)));
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
/*
* TODO: properly calculate open flags
*/
if (fsp->can_write && fsp->can_read) {
flags = O_RDWR;
} else if (fsp->can_write) {
flags = O_WRONLY;
} else if (fsp->can_read) {
flags = O_RDONLY;
}
status = fd_open(conn, fsp, flags, 0 /* mode */);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
DEBUG(1, ("vfs_default_durable_reconnect: failed to open "
"file: %s\n", nt_errstr(status)));
op->compat = NULL;
fsp_free(fsp);
return status;
}
/*
* We now check the stat info stored in the cookie against
* the current stat data from the file we just opened.
* If any detail differs, we deny the durable reconnect,
* because in that case it is very likely that someone
* opened the file while the handle was disconnected,
* which has to be interpreted as an oplock break.
*/
ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
if (ret == -1) {
status = map_nt_error_from_unix_common(errno);
DEBUG(1, ("Unable to fstat stream: %s => %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
if (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&cookie.id, &file_id)) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
ok = vfs_default_durable_reconnect_check_stat(&cookie.stat_info,
&fsp->fsp_name->st,
fsp_str_dbg(fsp));
if (!ok) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
status = set_file_oplock(fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("vfs_default_durable_reconnect failed to set oplock "
"after opening file: %s\n", nt_errstr(status)));
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
status = vfs_default_durable_cookie(fsp, mem_ctx, &new_cookie_blob);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
DEBUG(1, ("vfs_default_durable_reconnect: "
"vfs_default_durable_cookie - %s\n",
nt_errstr(status)));
op->compat = NULL;
fsp_free(fsp);
return status;
}
smb1req->chain_fsp = fsp;
smb1req->smb2req->compat_chain_fsp = fsp;
DEBUG(10, ("vfs_default_durable_reconnect: opened file '%s'\n",
fsp_str_dbg(fsp)));
/*
* release the sharemode lock: this writes the changes
*/
lck->data->modified = true;
TALLOC_FREE(lck);
*result = fsp;
*new_cookie = new_cookie_blob;
return NT_STATUS_OK;
}