Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/fcntl.c |
| 3 | * |
| 4 | * vfs operations that deal with the file control API |
| 5 | * |
| 6 | * Copyright (C) International Business Machines Corp., 2003,2004 |
| 7 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/stat.h> |
| 25 | #include <linux/fcntl.h> |
| 26 | #include "cifsglob.h" |
| 27 | #include "cifsproto.h" |
| 28 | #include "cifs_unicode.h" |
| 29 | #include "cifs_debug.h" |
| 30 | #include "cifsfs.h" |
| 31 | |
| 32 | static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags) |
| 33 | { |
| 34 | __u32 cifs_ntfy_flags = 0; |
| 35 | |
| 36 | /* No way on Linux VFS to ask to monitor xattr |
| 37 | changes (and no stream support either */ |
| 38 | if(fcntl_notify_flags & DN_ACCESS) { |
| 39 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS; |
| 40 | } |
| 41 | if(fcntl_notify_flags & DN_MODIFY) { |
| 42 | /* What does this mean on directories? */ |
| 43 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE | |
| 44 | FILE_NOTIFY_CHANGE_SIZE; |
| 45 | } |
| 46 | if(fcntl_notify_flags & DN_CREATE) { |
| 47 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION | |
| 48 | FILE_NOTIFY_CHANGE_LAST_WRITE; |
| 49 | } |
| 50 | if(fcntl_notify_flags & DN_DELETE) { |
| 51 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE; |
| 52 | } |
| 53 | if(fcntl_notify_flags & DN_RENAME) { |
| 54 | /* BB review this - checking various server behaviors */ |
| 55 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME | |
| 56 | FILE_NOTIFY_CHANGE_FILE_NAME; |
| 57 | } |
| 58 | if(fcntl_notify_flags & DN_ATTRIB) { |
| 59 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY | |
| 60 | FILE_NOTIFY_CHANGE_ATTRIBUTES; |
| 61 | } |
| 62 | /* if(fcntl_notify_flags & DN_MULTISHOT) { |
| 63 | cifs_ntfy_flags |= ; |
| 64 | } */ /* BB fixme - not sure how to handle this with CIFS yet */ |
| 65 | |
| 66 | |
| 67 | return cifs_ntfy_flags; |
| 68 | } |
| 69 | |
| 70 | int cifs_dir_notify(struct file * file, unsigned long arg) |
| 71 | { |
| 72 | int xid; |
| 73 | int rc = -EINVAL; |
| 74 | int oplock = FALSE; |
| 75 | struct cifs_sb_info *cifs_sb; |
| 76 | struct cifsTconInfo *pTcon; |
| 77 | char *full_path = NULL; |
| 78 | __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES; |
| 79 | __u16 netfid; |
| 80 | |
Steve French | 4ca9c19 | 2005-10-10 19:52:13 -0700 | [diff] [blame] | 81 | |
| 82 | if(experimEnabled == 0) |
| 83 | return 0; |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | xid = GetXid(); |
| 86 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
| 87 | pTcon = cifs_sb->tcon; |
| 88 | |
Arjan van de Ven | a11f3a0 | 2006-03-23 03:00:33 -0800 | [diff] [blame^] | 89 | mutex_lock(&file->f_dentry->d_sb->s_vfs_rename_mutex); |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 90 | full_path = build_path_from_dentry(file->f_dentry); |
Arjan van de Ven | a11f3a0 | 2006-03-23 03:00:33 -0800 | [diff] [blame^] | 91 | mutex_unlock(&file->f_dentry->d_sb->s_vfs_rename_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | if(full_path == NULL) { |
| 94 | rc = -ENOMEM; |
| 95 | } else { |
| 96 | cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */ |
| 97 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
| 98 | GENERIC_READ | SYNCHRONIZE, 0 /* create options */, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 99 | &netfid, &oplock,NULL, cifs_sb->local_nls, |
| 100 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | /* BB fixme - add this handle to a notify handle list */ |
| 102 | if(rc) { |
| 103 | cERROR(1,("Could not open directory for notify")); /* BB remove BB */ |
| 104 | } else { |
| 105 | filter = convert_to_cifs_notify_flags(arg); |
| 106 | if(filter != 0) { |
Steve French | 167a251 | 2005-08-24 20:03:11 -0700 | [diff] [blame] | 107 | rc = CIFSSMBNotify(xid, pTcon, |
| 108 | 0 /* no subdirs */, netfid, |
| 109 | filter, file, arg & DN_MULTISHOT, |
| 110 | cifs_sb->local_nls); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } else { |
| 112 | rc = -EINVAL; |
| 113 | } |
| 114 | /* BB add code to close file eventually (at unmount |
| 115 | it would close automatically but may be a way |
| 116 | to do it easily when inode freed or when |
| 117 | notify info is cleared/changed */ |
Steve French | 167a251 | 2005-08-24 20:03:11 -0700 | [diff] [blame] | 118 | cFYI(1,("notify rc %d",rc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | } |
| 121 | |
| 122 | FreeXid(xid); |
| 123 | return rc; |
| 124 | } |