fuse: lockd support
If fuse filesystem doesn't define it's own lock operations, then allow the
lock manager to work with fuse.
Adding lockd support for remote locking is also possible, but more rarely
used, so leave it till later.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: David Teigland <teigland@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8092f0d..67ff2c6 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1341,6 +1341,11 @@
pid_t pid = fl->fl_type != F_UNLCK ? current->tgid : 0;
int err;
+ if (fl->fl_lmops && fl->fl_lmops->fl_grant) {
+ /* NLM needs asynchronous locks, which we don't support yet */
+ return -ENOLCK;
+ }
+
/* Unlock on close is handled by the flush method */
if (fl->fl_flags & FL_CLOSE)
return 0;
@@ -1365,7 +1370,9 @@
struct fuse_conn *fc = get_fuse_conn(inode);
int err;
- if (cmd == F_GETLK) {
+ if (cmd == F_CANCELLK) {
+ err = 0;
+ } else if (cmd == F_GETLK) {
if (fc->no_lock) {
posix_test_lock(file, fl);
err = 0;
@@ -1373,7 +1380,7 @@
err = fuse_getlk(file, fl);
} else {
if (fc->no_lock)
- err = posix_lock_file_wait(file, fl);
+ err = posix_lock_file(file, fl, NULL);
else
err = fuse_setlk(file, fl, 0);
}