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-rw-r--r--fs/cifs/fcntl.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/fs/cifs/fcntl.c b/fs/cifs/fcntl.c
new file mode 100644
index 0000000..9d24c40
--- /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;
+}
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