/* * 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 = FALSE; 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; }