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authorJ. Bruce Fields <bfields@citi.umich.edu>2008-04-24 10:08:22 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2008-04-25 13:00:11 -0400
commit1a747ee0cc11a198f9e2435add821bd0dfedb7c1 (patch)
tree10b5a55bde30bef3f466e5126bd44fc0e111fc5a /include/linux/fs.h
parent17efa372cfe4d189705edf6cd4fbe283827a5dc7 (diff)
downloadlwn-1a747ee0cc11a198f9e2435add821bd0dfedb7c1.tar.gz
lwn-1a747ee0cc11a198f9e2435add821bd0dfedb7c1.zip
locks: don't call ->copy_lock methods on return of conflicting locks
The file_lock structure is used both as a heavy-weight representation of an active lock, with pointers to reference-counted structures, etc., and as a simple container for parameters that describe a file lock. The conflicting lock returned from __posix_lock_file is an example of the latter; so don't call the filesystem or lock manager callbacks when copying to it. This also saves the need for an unnecessary locks_init_lock in the nfsv4 server. Thanks to Trond for pointing out the error. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index cc2be2cf7d41..6556f2f967e5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -973,6 +973,7 @@ extern int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
/* fs/locks.c */
extern void locks_init_lock(struct file_lock *);
extern void locks_copy_lock(struct file_lock *, struct file_lock *);
+extern void __locks_copy_lock(struct file_lock *, const struct file_lock *);
extern void locks_remove_posix(struct file *, fl_owner_t);
extern void locks_remove_flock(struct file *);
extern void posix_test_lock(struct file *, struct file_lock *);