VFS: Add support for the FL_ACCESS flag to flock_lock_file()

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/locks.c b/fs/locks.c
index 50cb0a2b74d9..b0b41a64e10b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -739,6 +739,8 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
         int found = 0;
 
         lock_kernel();
+        if (request->fl_flags & FL_ACCESS)
+                goto find_conflict;
         for_each_lock(inode, before) {
                 struct file_lock *fl = *before;
                 if (IS_POSIX(fl))
@@ -771,6 +773,7 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
         if (found)
                 cond_resched();
 
+find_conflict:
         for_each_lock(inode, before) {
                 struct file_lock *fl = *before;
                 if (IS_POSIX(fl))
@@ -784,6 +787,8 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
                         locks_insert_block(fl, request);
                 goto out;
         }
+        if (request->fl_flags & FL_ACCESS)
+                goto out;
         locks_copy_lock(new_fl, request);
         locks_insert_lock(&inode->i_flock, new_fl);
         new_fl = NULL;