diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-10 22:35:38 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-11 00:20:12 -0500 |
| commit | d668dc56631da067540b2494d2a1f29ff7b5f15a (patch) | |
| tree | 303ad17208838e8b9b1752f9427d55c84555f0f0 /fs/autofs4/inode.c | |
| parent | 8753333266be67ff3a984ac1f6566d31c260bee4 (diff) | |
| download | blackbird-op-linux-d668dc56631da067540b2494d2a1f29ff7b5f15a.tar.gz blackbird-op-linux-d668dc56631da067540b2494d2a1f29ff7b5f15a.zip | |
autofs4: deal with autofs4_write/autofs4_write races
Just serialize the actual writing of packets into pipe on
a new mutex, independent from everything else in the locking
hierarchy. As soon as something has started feeding a piece
of packet into the pipe to daemon, we *want* everything else
about to try the same to wait until we are done.
Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/autofs4/inode.c')
| -rw-r--r-- | fs/autofs4/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 2ba44c79d548..e16980b00b8d 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -225,6 +225,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) sbi->min_proto = 0; sbi->max_proto = 0; mutex_init(&sbi->wq_mutex); + mutex_init(&sbi->pipe_mutex); spin_lock_init(&sbi->fs_lock); sbi->queues = NULL; spin_lock_init(&sbi->lookup_lock); |
