/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
file closing
Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Jeremy Allison 1992-2004.
+ 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 int DEBUGLEVEL;
-
-extern int32 global_oplocks_open;
-
+extern struct current_user current_user;
/****************************************************************************
-run a file if it is a magic script
+ Run a file if it is a magic script.
****************************************************************************/
+
static void check_magic(files_struct *fsp,connection_struct *conn)
{
- if (!*lp_magicscript(SNUM(conn)))
- return;
-
- DEBUG(5,("checking magic for %s\n",fsp->fsp_name));
-
- {
- char *p;
- if (!(p = strrchr(fsp->fsp_name,'/')))
- p = fsp->fsp_name;
- else
- p++;
-
- if (!strequal(lp_magicscript(SNUM(conn)),p))
- return;
- }
-
- {
- int ret;
- pstring magic_output;
- pstring fname;
- pstrcpy(fname,fsp->fsp_name);
-
- if (*lp_magicoutput(SNUM(conn)))
- pstrcpy(magic_output,lp_magicoutput(SNUM(conn)));
- else
- slprintf(magic_output,sizeof(fname)-1, "%s.out",fname);
-
- chmod(fname,0755);
- ret = smbrun(fname,magic_output,False);
- DEBUG(3,("Invoking magic command %s gave %d\n",fname,ret));
- unlink(fname);
- }
+ if (!*lp_magicscript(SNUM(conn)))
+ return;
+
+ DEBUG(5,("checking magic for %s\n",fsp->fsp_name));
+
+ {
+ char *p;
+ if (!(p = strrchr_m(fsp->fsp_name,'/')))
+ p = fsp->fsp_name;
+ else
+ p++;
+
+ if (!strequal(lp_magicscript(SNUM(conn)),p))
+ return;
+ }
+
+ {
+ int ret;
+ pstring magic_output;
+ pstring fname;
+ SMB_STRUCT_STAT st;
+ int tmp_fd, outfd;
+
+ pstrcpy(fname,fsp->fsp_name);
+ if (*lp_magicoutput(SNUM(conn)))
+ pstrcpy(magic_output,lp_magicoutput(SNUM(conn)));
+ else
+ slprintf(magic_output,sizeof(fname)-1, "%s.out",fname);
+
+ chmod(fname,0755);
+ ret = smbrun(fname,&tmp_fd);
+ DEBUG(3,("Invoking magic command %s gave %d\n",fname,ret));
+ unlink(fname);
+ if (ret != 0 || tmp_fd == -1) {
+ if (tmp_fd != -1)
+ close(tmp_fd);
+ return;
+ }
+ outfd = open(magic_output, O_CREAT|O_EXCL|O_RDWR, 0600);
+ if (outfd == -1) {
+ close(tmp_fd);
+ return;
+ }
+
+ if (sys_fstat(tmp_fd,&st) == -1) {
+ close(tmp_fd);
+ close(outfd);
+ return;
+ }
+
+ transfer_file(tmp_fd,outfd,(SMB_OFF_T)st.st_size);
+ close(tmp_fd);
+ close(outfd);
+ }
}
/****************************************************************************
Common code to close a file or a directory.
****************************************************************************/
-static void close_filestruct(files_struct *fsp)
+
+static int close_filestruct(files_struct *fsp)
{
connection_struct *conn = fsp->conn;
+ int ret = 0;
- fsp->open = False;
- fsp->is_directory = False;
-
+ if (fsp->fh->fd != -1) {
+ if(flush_write_cache(fsp, CLOSE_FLUSH) == -1)
+ ret = -1;
+
+ delete_write_cache(fsp);
+ }
+
conn->num_files_open--;
- if(fsp->wbmpx_ptr) {
- free((char *)fsp->wbmpx_ptr);
- fsp->wbmpx_ptr = NULL;
- }
-
-#if WITH_MMAP
- if(fsp->mmap_ptr) {
- munmap(fsp->mmap_ptr,fsp->mmap_size);
- fsp->mmap_ptr = NULL;
- }
-#endif
+ SAFE_FREE(fsp->wbmpx_ptr);
+
+ return ret;
}
/****************************************************************************
- Close a file - possibly invalidating the read prediction.
+ If any deferred opens are waiting on this close, notify them.
+****************************************************************************/
- 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.
+static void notify_deferred_opens(struct share_mode_lock *lck)
+{
+ 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);
+ }
+ }
+}
+
+/****************************************************************************
+ Deal with removing a share mode on last close.
****************************************************************************/
-void close_file(files_struct *fsp, BOOL normal_close)
+
+static NTSTATUS close_remove_share_mode(files_struct *fsp,
+ enum file_close_type close_type)
{
- SMB_DEV_T dev = fsp->fd_ptr->dev;
- SMB_INO_T inode = fsp->fd_ptr->inode;
- int token;
- BOOL last_reference = False;
- BOOL delete_on_close = fsp->fd_ptr->delete_on_close;
connection_struct *conn = fsp->conn;
+ BOOL delete_file = False;
+ struct share_mode_lock *lck;
+ SMB_STRUCT_STAT sbuf;
+ NTSTATUS status = NT_STATUS_OK;
- remove_pending_lock_requests_by_fid(fsp);
-
- close_filestruct(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.
+ */
-#if USE_READ_PREDICTION
- invalidate_read_prediction(fsp->fd_ptr->fd);
-#endif
+ lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode, NULL, NULL);
- if (lp_share_modes(SNUM(conn))) {
- lock_share_entry(conn, dev, inode, &token);
- del_share_mode(token, fsp);
+ 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(fd_attempt_close(fsp) == 0)
- last_reference = True;
+ if (!del_share_mode(lck, fsp)) {
+ DEBUG(0, ("close_remove_share_mode: Could not delete share "
+ "entry for file %s\n", fsp->fsp_name));
+ }
- fsp->fd_ptr = NULL;
+ if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
+ BOOL became_user = False;
- if (lp_share_modes(SNUM(conn)))
- unlock_share_entry(conn, dev, inode, token);
+ /* Initial delete on close was set and no one else
+ * wrote a real delete on close. */
- /* NT uses smbclose to start a print - weird */
- if (normal_close && fsp->print_file)
- print_file(conn, SNUM(conn), fsp);
+ 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();
+ }
+ }
- /* check for magic scripts */
- if (normal_close) {
- check_magic(fsp,conn);
+ 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 */
+ for (i=0; i<lck->num_share_modes; i++) {
+ if (is_valid_share_mode_entry(&lck->share_modes[i])) {
+ 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 (normal_close && last_reference && delete_on_close) {
- DEBUG(5,("close_file: file %s. Delete on close was set - deleting file.\n",
- fsp->fsp_name));
- if(fsp->conn->vfs_ops.unlink(dos_to_unix(fsp->fsp_name, False)) != 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.
- */
+ if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
+ || !delete_file
+ || (lck->delete_token == NULL)) {
+ TALLOC_FREE(lck);
+ return NT_STATUS_OK;
+ }
- DEBUG(5,("close_file: file %s. Delete on close was set and unlink failed \
-with error %s\n", fsp->fsp_name, strerror(errno) ));
- }
- }
+ /*
+ * Ok, we have to delete the file
+ */
+
+ 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) ));
+ /*
+ * Don't save the errno here, we ignore this error
+ */
+ goto done;
+ }
+
+ 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;
+ }
+
+ 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) ));
+
+ status = map_nt_error_from_unix(errno);
+ goto done;
+ }
+
+ status = NT_STATUS_FILE_DELETED;
- if(fsp->granted_oplock == True)
- global_oplocks_open--;
+ done:
+ /* unbecome user. */
+ pop_sec_ctx();
+
+ TALLOC_FREE(lck);
+ return status;
+}
+
+/****************************************************************************
+ Close a file.
- fsp->sent_oplock_break = False;
+ 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 int close_normal_file(files_struct *fsp, enum file_close_type close_type)
+{
+ connection_struct *conn = fsp->conn;
+ int saved_errno = 0;
+ int err = 0;
+ int err1 = 0;
+
+ if (fsp->aio_write_behind) {
+ /*
+ * If we're finishing write behind on a close we can get a write
+ * error here, we must remember this.
+ */
+ int ret = wait_for_aio_completion(fsp);
+ if (ret) {
+ saved_errno = ret;
+ err1 = -1;
+ }
+ } else {
+ cancel_aio_by_fsp(fsp);
+ }
+
+ /*
+ * If we're flushing on a close we can get a write
+ * error here, we must remember this.
+ */
+
+ if (close_filestruct(fsp) == -1) {
+ saved_errno = errno;
+ err1 = -1;
+ }
+
+ if (fsp->print_file) {
+ print_fsp_end(fsp, close_type);
+ file_free(fsp);
+ return 0;
+ }
- DEBUG(2,("%s closed file %s (numopen=%d)\n",
- conn->user,fsp->fsp_name,
- conn->num_files_open));
+ /* 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->fsp_name) {
- string_free(&fsp->fsp_name);
+ if (fsp->fh->ref_count == 1) {
+ /* Should we return on error here... ? */
+ close_remove_share_mode(fsp, close_type);
}
+ if(fsp->oplock_type) {
+ release_file_oplock(fsp);
+ }
+
+ locking_close_file(fsp);
+
+ err = fd_close(conn, 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;
+ }
+
+ /* check for magic scripts */
+ if (close_type == NORMAL_CLOSE) {
+ check_magic(fsp,conn);
+ }
+
+ /*
+ * Ensure pending modtime is set after close.
+ */
+
+ if(fsp->pending_modtime && fsp->pending_modtime_owner) {
+ set_filetime(conn, fsp->fsp_name, fsp->pending_modtime);
+ } else if (fsp->last_write_time) {
+ set_filetime(conn, fsp->fsp_name, fsp->last_write_time);
+ }
+
+ 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) : ""));
+
file_free(fsp);
+
+ if (err == -1 || err1 == -1) {
+ errno = saved_errno;
+ return saved_errno;
+ } else {
+ return 0;
+ }
}
/****************************************************************************
Close a directory opened by an NT SMB call.
****************************************************************************/
-void close_directory(files_struct *fsp)
+static int 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;
+
+ /*
+ * NT can set delete_on_close of the last open
+ * reference to a directory also.
+ */
+
+ 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 EINVAL;
+ }
+
+ 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 */
+ for (i=0; i<lck->num_share_modes; i++) {
+ if (is_valid_share_mode_entry(&lck->share_modes[i])) {
+ delete_dir = False;
+ break;
+ }
+ }
+ }
+
+ if ((close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE) &&
+ delete_dir &&
+ lck->delete_token) {
+ BOOL ok;
+
+ /* 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);
+
+ 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" ));
+
+ /* 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_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;
+}
+
+/****************************************************************************
+ Close a 'stat file' opened internally.
+****************************************************************************/
+
+static int close_stat(files_struct *fsp)
+{
+ /*
+ * Do the code common to files and directories.
+ */
+ close_filestruct(fsp);
+ file_free(fsp);
+ return 0;
}
+/****************************************************************************
+ Close a files_struct.
+****************************************************************************/
+
+int close_file(files_struct *fsp, enum file_close_type close_type)
+{
+ if(fsp->is_directory)
+ return close_directory(fsp, close_type);
+ else if (fsp->is_stat)
+ return close_stat(fsp);
+ else if (fsp->fake_file_handle != NULL)
+ return close_fake_file(fsp);
+ else
+ return close_normal_file(fsp, close_type);
+}
git.samba.org / ira / wip.git / blobdiff