diff options
Diffstat (limited to 'fs/cifs/fcntl.c')
| -rw-r--r-- | fs/cifs/fcntl.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/fs/cifs/fcntl.c b/fs/cifs/fcntl.c new file mode 100644 index 000000000000..9d24c40f1967 --- /dev/null +++ b/fs/cifs/fcntl.c @@ -0,0 +1,117 @@ +/* + * 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; + + xid = GetXid(); + cifs_sb = CIFS_SB(file->f_dentry->d_sb); + pTcon = cifs_sb->tcon; + + down(&file->f_dentry->d_sb->s_vfs_rename_sem); + full_path = build_path_from_dentry(file->f_dentry); + up(&file->f_dentry->d_sb->s_vfs_rename_sem); + + if(full_path == NULL) { + rc = -ENOMEM; + } else { + cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */ + rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, + GENERIC_READ | SYNCHRONIZE, 0 /* create options */, + &netfid, &oplock,NULL, cifs_sb->local_nls); + /* BB fixme - add this handle to a notify handle list */ + if(rc) { + cERROR(1,("Could not open directory for notify")); /* BB remove BB */ + } else { + filter = convert_to_cifs_notify_flags(arg); + if(filter != 0) { + rc = CIFSSMBNotify(xid, pTcon, 0 /* no subdirs */, netfid, + filter, 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 */ + cERROR(1,("notify rc %d",rc)); + } + } + + FreeXid(xid); + return rc; +} |