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fuse: wakeup pollers on connection release/abort 

If a fuse dev connection is broken, wake up any
processes that are blocking, in a poll system call,
on one of the files in the now defunct filesystem.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Bryan Green 2011-03-01 16:43:52 -08:00 committed by Miklos Szeredi
parent 07d5f69b45
commit 357ccf2b69
2 changed files with 18 additions and 1 deletions
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17
fs/fuse/dev.c
View File

@ -1910,6 +1910,21 @@ __acquires(fc->lock)
kfree(dequeue_forget(fc, 1, NULL));
}
static void end_polls(struct fuse_conn *fc)
{
struct rb_node *p;
p = rb_first(&fc->polled_files);
while (p) {
struct fuse_file *ff;
ff = rb_entry(p, struct fuse_file, polled_node);
wake_up_interruptible_all(&ff->poll_wait);
p = rb_next(p);
}
}
/*
* Abort all requests.
*
@ -1937,6 +1952,7 @@ void fuse_abort_conn(struct fuse_conn *fc)
fc->blocked = 0;
end_io_requests(fc);
end_queued_requests(fc);
end_polls(fc);
wake_up_all(&fc->waitq);
wake_up_all(&fc->blocked_waitq);
kill_fasync(&fc->fasync, SIGIO, POLL_IN);
@ -1953,6 +1969,7 @@ int fuse_dev_release(struct inode *inode, struct file *file)
fc->connected = 0;
fc->blocked = 0;
end_queued_requests(fc);
end_polls(fc);
wake_up_all(&fc->blocked_waitq);
spin_unlock(&fc->lock);
fuse_conn_put(fc);

2
fs/fuse/file.c
View File

@ -222,7 +222,7 @@ static void fuse_prepare_release(struct fuse_file *ff, int flags, int opcode)
rb_erase(&ff->polled_node, &fc->polled_files);
spin_unlock(&fc->lock);
wake_up_interruptible_sync(&ff->poll_wait);
wake_up_interruptible_all(&ff->poll_wait);
inarg->fh = ff->fh;
inarg->flags = flags;