Unix SMB/CIFS implementation.
file closing
Copyright (C) Andrew Tridgell 1992-1998
- Copyright (C) Jeremy Allison 1992-2004.
+ Copyright (C) Jeremy Allison 1992-2007.
+ Copyright (C) Volker Lendecke 2005
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
#include "includes.h"
+extern struct current_user current_user;
+
/****************************************************************************
Run a file if it is a magic script.
****************************************************************************/
Common code to close a file or a directory.
****************************************************************************/
-static int close_filestruct(files_struct *fsp)
+static NTSTATUS close_filestruct(files_struct *fsp)
{
+ NTSTATUS status = NT_STATUS_OK;
connection_struct *conn = fsp->conn;
- int ret = 0;
- if (fsp->fd != -1) {
- if(flush_write_cache(fsp, CLOSE_FLUSH) == -1)
- ret = -1;
-
+ if (fsp->fh->fd != -1) {
+ if(flush_write_cache(fsp, CLOSE_FLUSH) == -1) {
+ status = map_nt_error_from_unix(errno);
+ }
delete_write_cache(fsp);
}
conn->num_files_open--;
SAFE_FREE(fsp->wbmpx_ptr);
-
- return ret;
+ return status;
}
/****************************************************************************
If any deferred opens are waiting on this close, notify them.
****************************************************************************/
-static void notify_deferred_opens(files_struct *fsp)
+static void notify_deferred_opens(struct share_mode_lock *lck)
{
- deferred_open_entry *de_array = NULL;
- int num_de_entries, i;
- pid_t mypid = sys_getpid();
-
- if (!lp_defer_sharing_violations()) {
- return;
- }
-
- num_de_entries = get_deferred_opens(fsp->conn, fsp->dev, fsp->inode, &de_array);
- for (i = 0; i < num_de_entries; i++) {
- deferred_open_entry *entry = &de_array[i];
- if (entry->pid == mypid) {
- /*
- * We need to notify ourself to retry the open.
- * Do this by finding the queued SMB record, moving it
- * to the head of the queue and changing the wait time to zero.
- */
- schedule_sharing_violation_open_smb_message(entry->mid);
- } else {
- send_deferred_open_retry_message(entry);
- }
- }
+ int i;
+
+ for (i=0; i<lck->num_share_modes; i++) {
+ struct share_mode_entry *e = &lck->share_modes[i];
+
+ if (!is_deferred_open_entry(e)) {
+ continue;
+ }
+
+ if (procid_is_me(&e->pid)) {
+ /*
+ * We need to notify ourself to retry the open. Do
+ * this by finding the queued SMB record, moving it to
+ * the head of the queue and changing the wait time to
+ * zero.
+ */
+ schedule_deferred_open_smb_message(e->op_mid);
+ } else {
+ char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
+
+ share_mode_entry_to_message(msg, e);
+
+ message_send_pid(e->pid, MSG_SMB_OPEN_RETRY,
+ msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
+ }
+ }
}
/****************************************************************************
- Close a file.
-
- If normal_close is 1 then this came from a normal SMBclose (or equivalent)
- operation otherwise it came as the result of some other operation such as
- the closing of the connection. In the latter case printing and
- magic scripts are not run.
+ Deal with removing a share mode on last close.
****************************************************************************/
-static int close_normal_file(files_struct *fsp, BOOL normal_close)
+static NTSTATUS close_remove_share_mode(files_struct *fsp,
+ enum file_close_type close_type)
{
- share_mode_entry *share_entry = NULL;
- size_t share_entry_count = 0;
- BOOL delete_on_close = False;
connection_struct *conn = fsp->conn;
- int saved_errno = 0;
- int err = 0;
- int err1 = 0;
-
- remove_pending_lock_requests_by_fid(fsp);
+ BOOL delete_file = False;
+ struct share_mode_lock *lck;
+ SMB_STRUCT_STAT sbuf;
+ NTSTATUS status = NT_STATUS_OK;
/*
- * If we're flushing on a close we can get a write
- * error here, we must remember this.
+ * 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.
*/
- if (close_filestruct(fsp) == -1) {
- saved_errno = errno;
- err1 = -1;
+ lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL, NULL);
+
+ if (lck == NULL) {
+ DEBUG(0, ("close_remove_share_mode: Could not get share mode "
+ "lock for file %s\n", fsp->fsp_name));
+ return NT_STATUS_INVALID_PARAMETER;
}
- if (fsp->print_file) {
- print_fsp_end(fsp, normal_close);
- file_free(fsp);
- return 0;
+ if (!del_share_mode(lck, fsp)) {
+ DEBUG(0, ("close_remove_share_mode: Could not delete share "
+ "entry for file %s\n", fsp->fsp_name));
+ }
+
+ 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;
+ }
+ 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);
+
/*
- * 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.
+ * NT can set delete_on_close of the last open
+ * reference to a file.
*/
- lock_share_entry_fsp(fsp);
+ 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
+ */
- if (fsp->delete_on_close) {
+ DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
+ "- deleting file.\n", fsp->fsp_name));
+
+ /* Become the user who requested the delete. */
+
+ 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);
+
+ /* We can only delete the file if the name we have is still valid and
+ hasn't been renamed. */
+
+ if(SMB_VFS_STAT(conn,fsp->fsp_name,&sbuf) != 0) {
+ DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
+ "was set and stat failed with error %s\n",
+ fsp->fsp_name, strerror(errno) ));
/*
- * Modify the share mode entry for all files open
- * on this device and inode to tell other smbds we have
- * changed the delete on close flag. The last closer will delete the file
- * if flag is set.
+ * Don't save the errno here, we ignore this error
*/
+ goto done;
+ }
- NTSTATUS status =set_delete_on_close_over_all(fsp, fsp->delete_on_close);
- if (NT_STATUS_V(status) != NT_STATUS_V(NT_STATUS_OK))
- DEBUG(0,("close_normal_file: failed to change delete on close flag for file %s\n",
- fsp->fsp_name ));
+ if(sbuf.st_dev != fsp->dev || sbuf.st_ino != fsp->inode) {
+ DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
+ "was set and dev and/or inode does not match\n",
+ fsp->fsp_name ));
+ DEBUG(5,("close_remove_share_mode: file %s. stored dev = %x, "
+ "inode = %.0f stat dev = %x, inode = %.0f\n",
+ fsp->fsp_name,
+ (unsigned int)fsp->dev, (double)fsp->inode,
+ (unsigned int)sbuf.st_dev, (double)sbuf.st_ino ));
+ /*
+ * Don't save the errno here, we ignore this error
+ */
+ goto done;
}
- share_entry_count = del_share_mode(fsp, &share_entry);
+ 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->fsp_name, strerror(errno) ));
- DEBUG(10,("close_normal_file: share_entry_count = %lu for file %s\n",
- (unsigned long)share_entry_count, fsp->fsp_name ));
+ status = map_nt_error_from_unix(errno);
+ }
- /*
- * We delete on close if it's the last open, and the
- * delete on close flag was set in the entry we just deleted.
- */
+ notify_fname(conn, NOTIFY_ACTION_REMOVED,
+ FILE_NOTIFY_CHANGE_FILE_NAME,
+ fsp->fsp_name);
- if ((share_entry_count == 0) && share_entry &&
- GET_DELETE_ON_CLOSE_FLAG(share_entry->share_mode) )
- delete_on_close = True;
+ /* 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.
+ */
- SAFE_FREE(share_entry);
+ set_delete_on_close_lck(lck, False, NULL);
- /* Notify any deferred opens waiting on this close. */
- notify_deferred_opens(fsp);
+ done:
+
+ /* unbecome user. */
+ pop_sec_ctx();
+
+ TALLOC_FREE(lck);
+ return status;
+}
+
+/****************************************************************************
+ Close a file.
+ close_type can be NORMAL_CLOSE=0,SHUTDOWN_CLOSE,ERROR_CLOSE.
+ printing and magic scripts are only run on normal close.
+ delete on close is done on normal and shutdown close.
+****************************************************************************/
+
+static NTSTATUS close_normal_file(files_struct *fsp, enum file_close_type close_type)
+{
+ NTSTATUS status = NT_STATUS_OK;
+ NTSTATUS saved_status1 = NT_STATUS_OK;
+ NTSTATUS saved_status2 = NT_STATUS_OK;
+ connection_struct *conn = fsp->conn;
+
+ cancel_aio_by_fsp(fsp);
+
/*
- * NT can set delete_on_close of the last open
- * reference to a file.
+ * If we're flushing on a close we can get a write
+ * error here, we must remember this.
*/
- if (normal_close && delete_on_close) {
- DEBUG(5,("close_file: file %s. Delete on close was set - deleting file.\n",
- fsp->fsp_name));
- 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_file: file %s. Delete on close was set and unlink failed \
-with error %s\n", fsp->fsp_name, strerror(errno) ));
- }
- process_pending_change_notify_queue((time_t)0);
+ saved_status1 = close_filestruct(fsp);
+
+ if (fsp->print_file) {
+ print_fsp_end(fsp, close_type);
+ file_free(fsp);
+ return NT_STATUS_OK;
}
- unlock_share_entry_fsp(fsp);
+ /* If this is an old DOS or FCB open and we have multiple opens on
+ the same handle we only have one share mode. Ensure we only remove
+ the share mode on the last close. */
- if(fsp->oplock_type)
- release_file_oplock(fsp);
+ if (fsp->fh->ref_count == 1) {
+ /* Should we return on error here... ? */
+ saved_status2 = close_remove_share_mode(fsp, close_type);
+ }
- locking_close_file(fsp);
+ if(fsp->oplock_type) {
+ release_file_oplock(fsp);
+ }
- err = fd_close(conn, fsp);
+ locking_close_file(smbd_messaging_context(), fsp);
- /* Only save errno if fd_close failed and we don't already
- have an errno saved from a flush call. */
- if ((err1 != -1) && (err == -1)) {
- saved_errno = errno;
- }
+ status = fd_close(conn, fsp);
/* check for magic scripts */
- if (normal_close) {
+ if (close_type == NORMAL_CLOSE) {
check_magic(fsp,conn);
}
* Ensure pending modtime is set after close.
*/
- if(fsp->pending_modtime && fsp->pending_modtime_owner) {
+ if (fsp->pending_modtime_owner && !null_timespec(fsp->pending_modtime)) {
set_filetime(conn, fsp->fsp_name, fsp->pending_modtime);
- } else if (fsp->last_write_time) {
+ } else if (!null_timespec(fsp->last_write_time)) {
set_filetime(conn, fsp->fsp_name, fsp->last_write_time);
}
+ if (NT_STATUS_IS_OK(status)) {
+ if (!NT_STATUS_IS_OK(saved_status1)) {
+ status = saved_status1;
+ } else if (!NT_STATUS_IS_OK(saved_status2)) {
+ status = saved_status2;
+ }
+ }
+
DEBUG(2,("%s closed file %s (numopen=%d) %s\n",
conn->user,fsp->fsp_name,
conn->num_files_open,
- (err == -1 || err1 == -1) ? strerror(saved_errno) : ""));
-
- if (fsp->fsp_name)
- string_free(&fsp->fsp_name);
+ nt_errstr(status) ));
file_free(fsp);
-
- if (err == -1 || err1 == -1) {
- errno = saved_errno;
- return saved_errno;
- } else {
- return 0;
- }
+ return status;
}
/****************************************************************************
Close a directory opened by an NT SMB call.
****************************************************************************/
-static int close_directory(files_struct *fsp, BOOL normal_close)
+static NTSTATUS close_directory(files_struct *fsp, enum file_close_type close_type)
{
- remove_pending_change_notify_requests_by_fid(fsp);
+ struct share_mode_lock *lck = 0;
+ BOOL delete_dir = False;
+ NTSTATUS status = NT_STATUS_OK;
/*
* NT can set delete_on_close of the last open
* reference to a directory also.
*/
- if (normal_close && fsp->directory_delete_on_close) {
- BOOL ok = rmdir_internals(fsp->conn, fsp->fsp_name);
- DEBUG(5,("close_directory: %s. Delete on close was set - deleting directory %s.\n",
- fsp->fsp_name, ok ? "succeeded" : "failed" ));
+ lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL, NULL);
+
+ if (lck == NULL) {
+ DEBUG(0, ("close_directory: Could not get share mode lock for %s\n", fsp->fsp_name));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!del_share_mode(lck, fsp)) {
+ DEBUG(0, ("close_directory: Could not delete share entry for %s\n", fsp->fsp_name));
+ }
+
+ if (fsp->initial_delete_on_close) {
+ BOOL became_user = False;
+
+ /* Initial delete on close was set - for
+ * directories we don't care if anyone else
+ * wrote a real delete on close. */
+
+ if (current_user.vuid != fsp->vuid) {
+ become_user(fsp->conn, fsp->vuid);
+ became_user = True;
+ }
+ send_stat_cache_delete_message(fsp->fsp_name);
+ set_delete_on_close_lck(lck, True, ¤t_user.ut);
+ if (became_user) {
+ unbecome_user();
+ }
+ }
+
+ delete_dir = lck->delete_on_close;
+
+ if (delete_dir) {
+ int i;
+ /* See if others still have the dir 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_dir = False;
+ break;
+ }
+ }
+ }
+
+ if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
+ delete_dir &&
+ lck->delete_token) {
+
+ /* Become the user who requested the delete. */
+
+ if (!push_sec_ctx()) {
+ smb_panic("close_directory: 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);
+
+ TALLOC_FREE(lck);
+
+ status = rmdir_internals(fsp->conn, fsp->fsp_name);
+
+ DEBUG(5,("close_directory: %s. Delete on close was set - "
+ "deleting directory returned %s.\n",
+ fsp->fsp_name, nt_errstr(status)));
+
+ /* unbecome user. */
+ pop_sec_ctx();
/*
* Ensure we remove any change notify requests that would
* now fail as the directory has been deleted.
*/
- if(ok)
- remove_pending_change_notify_requests_by_filename(fsp);
- process_pending_change_notify_queue((time_t)0);
+ if(NT_STATUS_IS_OK(status)) {
+ remove_pending_change_notify_requests_by_fid(fsp, NT_STATUS_DELETE_PENDING);
+ }
+ } else {
+ TALLOC_FREE(lck);
+ remove_pending_change_notify_requests_by_fid(
+ fsp, NT_STATUS_OK);
}
/*
* Do the code common to files and directories.
*/
close_filestruct(fsp);
-
- if (fsp->fsp_name)
- string_free(&fsp->fsp_name);
-
file_free(fsp);
- return 0;
+ return status;
}
/****************************************************************************
Close a 'stat file' opened internally.
****************************************************************************/
-static int close_stat(files_struct *fsp)
+NTSTATUS close_stat(files_struct *fsp)
{
/*
* Do the code common to files and directories.
*/
close_filestruct(fsp);
-
- if (fsp->fsp_name)
- string_free(&fsp->fsp_name);
-
file_free(fsp);
- return 0;
+ return NT_STATUS_OK;
}
/****************************************************************************
Close a files_struct.
****************************************************************************/
-int close_file(files_struct *fsp, BOOL normal_close)
+NTSTATUS close_file(files_struct *fsp, enum file_close_type close_type)
{
- if(fsp->is_directory)
- return close_directory(fsp, normal_close);
- else if (fsp->is_stat)
+ if(fsp->is_directory) {
+ return close_directory(fsp, close_type);
+ } else if (fsp->is_stat) {
return close_stat(fsp);
- else
- return close_normal_file(fsp, normal_close);
+ } else if (fsp->fake_file_handle != NULL) {
+ return close_fake_file(fsp);
+ }
+ return close_normal_file(fsp, close_type);
}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff