| /* |
| * fs/cifs/fcntl.c |
| * |
| * vfs operations that deal with the file control API |
| * |
| * Copyright (C) International Business Machines Corp., 2003,2004 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library 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 Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <linux/fs.h> |
| #include <linux/stat.h> |
| #include <linux/fcntl.h> |
| #include "cifsglob.h" |
| #include "cifsproto.h" |
| #include "cifs_unicode.h" |
| #include "cifs_debug.h" |
| #include "cifsfs.h" |
| |
| static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags) |
| { |
| __u32 cifs_ntfy_flags = 0; |
| |
| /* No way on Linux VFS to ask to monitor xattr |
| changes (and no stream support either */ |
| if (fcntl_notify_flags & DN_ACCESS) |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS; |
| if (fcntl_notify_flags & DN_MODIFY) { |
| /* What does this mean on directories? */ |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE | |
| FILE_NOTIFY_CHANGE_SIZE; |
| } |
| if (fcntl_notify_flags & DN_CREATE) { |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION | |
| FILE_NOTIFY_CHANGE_LAST_WRITE; |
| } |
| if (fcntl_notify_flags & DN_DELETE) |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE; |
| if (fcntl_notify_flags & DN_RENAME) { |
| /* BB review this - checking various server behaviors */ |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME | |
| FILE_NOTIFY_CHANGE_FILE_NAME; |
| } |
| if (fcntl_notify_flags & DN_ATTRIB) { |
| cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY | |
| FILE_NOTIFY_CHANGE_ATTRIBUTES; |
| } |
| /* if (fcntl_notify_flags & DN_MULTISHOT) { |
| cifs_ntfy_flags |= ; |
| } */ /* BB fixme - not sure how to handle this with CIFS yet */ |
| |
| return cifs_ntfy_flags; |
| } |
| |
| int cifs_dir_notify(struct file *file, unsigned long arg) |
| { |
| int xid; |
| int rc = -EINVAL; |
| int oplock = 0; |
| struct cifs_sb_info *cifs_sb; |
| struct cifsTconInfo *pTcon; |
| char *full_path = NULL; |
| __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES; |
| __u16 netfid; |
| |
| if (experimEnabled == 0) |
| return 0; |
| |
| xid = GetXid(); |
| cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
| pTcon = cifs_sb->tcon; |
| |
| full_path = build_path_from_dentry(file->f_path.dentry); |
| |
| if (full_path == NULL) { |
| rc = -ENOMEM; |
| } else { |
| cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg)); |
| rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
| GENERIC_READ | SYNCHRONIZE, 0 /* create options */, |
| &netfid, &oplock, NULL, cifs_sb->local_nls, |
| cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| /* BB fixme - add this handle to a notify handle list */ |
| if (rc) { |
| cFYI(1, ("Could not open directory for notify")); |
| } else { |
| filter = convert_to_cifs_notify_flags(arg); |
| if (filter != 0) { |
| rc = CIFSSMBNotify(xid, pTcon, |
| 0 /* no subdirs */, netfid, |
| filter, file, arg & DN_MULTISHOT, |
| cifs_sb->local_nls); |
| } else { |
| rc = -EINVAL; |
| } |
| /* BB add code to close file eventually (at unmount |
| it would close automatically but may be a way |
| to do it easily when inode freed or when |
| notify info is cleared/changed */ |
| cFYI(1, ("notify rc %d", rc)); |
| } |
| } |
| |
| FreeXid(xid); |
| return rc; |
| } |