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 32static __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 } */ 65 66 return cifs_ntfy_flags; 67} 68 69int cifs_dir_notify(struct file * file, unsigned long arg) 70{ 71 int xid; 72 int rc = -EINVAL; 73 int oplock = FALSE; 74 struct cifs_sb_info *cifs_sb; 75 struct cifsTconInfo *pTcon; 76 char *full_path = NULL; 77 __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES; 78 __u16 netfid; 79 80 if (experimEnabled == 0) 81 return 0; 82 83 xid = GetXid(); 84 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); 85 pTcon = cifs_sb->tcon; 86 87 full_path = build_path_from_dentry(file->f_path.dentry); 88 89 if (full_path == NULL) { 90 rc = -ENOMEM; 91 } else { 92 cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg)); 93 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, 94 GENERIC_READ | SYNCHRONIZE, 0 /* create options */, 95 &netfid, &oplock, NULL, cifs_sb->local_nls, 96 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); 97 if (rc) { 98 cFYI(1, ("Could not open directory for notify")); 99 } else { 100 filter = convert_to_cifs_notify_flags(arg); 101 if (filter != 0) { 102 rc = CIFSSMBNotify(xid, pTcon, 103 0 /* no subdirs */, netfid, 104 filter, file, arg & DN_MULTISHOT, 105 cifs_sb->local_nls); 106 } else { 107 rc = -EINVAL; 108 } 109 /* BB add code to close file eventually (at unmount 110 it would close automatically but may be a way 111 to do it easily when inode freed or when 112 notify info is cleared/changed */ 113 cFYI(1, ("notify rc %d", rc)); 114 } 115 } 116 117 FreeXid(xid); 118 return rc; 119} 120