static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
struct server_id self = messaging_server_id(conn->sconn->msg_ctx);
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
const struct security_unix_token *del_token = NULL;
const struct security_token *del_nt_token = NULL;
bool got_tokens = false;
bool normal_close;
int ret_flock, retries = 1;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(fsp->conn->sconn->ev_ctx,
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
return NT_STATUS_INVALID_PARAMETER;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->data->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (fsp->initial_delete_on_close &&
!is_delete_on_close_set(lck, fsp->name_hash)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (get_current_vuid(conn) != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(fsp, lck,
get_current_nttok(conn),
get_current_utok(conn));
if (became_user) {
unbecome_user();
}
}
delete_file = is_delete_on_close_set(lck, fsp->name_hash);
if (delete_file) {
int i;
/* See if others still have the file open via this pathname.
If this is the case, then don't delete. If all opens are
POSIX delete now. */
for (i=0; i<lck->data->num_share_modes; i++) {
struct share_mode_entry *e = &lck->data->share_modes[i];
if (!is_valid_share_mode_entry(e)) {
continue;
}
if (e->name_hash != fsp->name_hash) {
continue;
}
if ((fsp->posix_flags & FSP_POSIX_FLAGS_OPEN)
&& (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
if (serverid_equal(&self, &e->pid) &&
(e->share_file_id == fsp->fh->gen_id)) {
continue;
}
if (share_mode_stale_pid(lck->data, i)) {
continue;
}
delete_file = False;
break;
}
}
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
normal_close = (close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE);
if (!normal_close || !delete_file) {
status = NT_STATUS_OK;
goto done;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
got_tokens = get_delete_on_close_token(lck, fsp->name_hash,
&del_nt_token, &del_token);
SMB_ASSERT(got_tokens);
if (!unix_token_equal(del_token, get_current_utok(conn))) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)del_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(del_token->uid,
del_token->gid,
del_token->ngroups,
del_token->groups,
del_nt_token);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
retry_delete:
/* temporary files with delete on close set will not be deleted on a
* cifs share using a netapp backend since they are opened with
* read + write access mask.
* close the file to allow the delete.
*/
if (fsp->can_write && !S_ISDIR(fsp->fsp_name->st.st_ex_mode) &&
fsp->fh->ref_count == 1 && retries) {
status = fd_close(fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("close_remove_share_mode: Error %s closing %s\n",
nt_errstr(status),
smb_fname_str_dbg(fsp->fsp_name)));
goto skip_retry;
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
retries = 0;
goto retry_delete;
}
} else {
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
}
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
skip_retry:
fsp->delete_on_close = false;
reset_delete_on_close_lck(fsp, lck);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
/* remove filesystem sharemodes */
ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, 0, 0);
if (ret_flock == -1) {
DEBUG(2, ("close_remove_share_mode: removing kernel flock for "
"%s failed: %s\n", fsp_str_dbg(fsp),
strerror(errno)));
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n", fsp_str_dbg(fsp)));
}
TALLOC_FREE(lck);
if (delete_file) {
/*
* Do the notification after we released the share
* mode lock. Inside notify_fname we take out another
* tdb lock. With ctdb also accessing our databases,
* this can lead to deadlocks. Putting this notify
* after the TALLOC_FREE(lck) above we avoid locking
* two records simultaneously. Notifies are async and
* informational only, so calling the notify_fname
* without holding the share mode lock should not do
* any harm.
*/
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
}
return status;
}
static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(smbd_event_context(),
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
NULL);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n",
fsp_str_dbg(fsp)));
}
if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (current_user.vuid != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(lck, True, ¤t_user.ut);
if (became_user) {
unbecome_user();
}
}
delete_file = lck->delete_on_close;
if (delete_file) {
int i;
/* See if others still have the file open. If this is the
* case, then don't delete. If all opens are POSIX delete now. */
for (i=0; i<lck->num_share_modes; i++) {
struct share_mode_entry *e = &lck->share_modes[i];
if (is_valid_share_mode_entry(e)) {
if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
delete_file = False;
break;
}
}
}
/* Notify any deferred opens waiting on this close. */
notify_deferred_opens(lck);
reply_to_oplock_break_requests(fsp);
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
|| !delete_file
|| (lck->delete_token == NULL)) {
TALLOC_FREE(lck);
return NT_STATUS_OK;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)lck->delete_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(lck->delete_token->uid,
lck->delete_token->gid,
lck->delete_token->ngroups,
lck->delete_token->groups,
NULL);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
fsp->delete_on_close = false;
set_delete_on_close_lck(lck, False, NULL);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
TALLOC_FREE(lck);
return status;
}
