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| author | Miklos Szeredi <mszeredi@suse.cz> | 2007-10-16 23:31:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:43:04 -0700 |
| commit | a131de0a482ac95e6469f56981c7b063593fdc5d (patch) | |
| tree | 0799985119f15525cc8c3c93a4cacad307405a5a /fs/fuse | |
| parent | 819c4b3b4009275caae973691378235c177a1429 (diff) | |
| download | linux-stable-a131de0a482ac95e6469f56981c7b063593fdc5d.tar.gz linux-stable-a131de0a482ac95e6469f56981c7b063593fdc5d.tar.bz2 linux-stable-a131de0a482ac95e6469f56981c7b063593fdc5d.zip | |
fuse: no abort on interrupt
Don't set 'aborted' flag on a request if it's interrupted. We have to wait
for the answer anyway, and this would only a very little time while copying
the reply.
This means, that write() on the fuse device will not return -ENOENT during
normal operation, only if the filesystem is aborted by a forced umount or
through the fusectl interface.
This could simplify userspace code somewhat when backward compatibility with
earlier kernel versions is not required.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dev.c | 43 |
1 files changed, 24 insertions, 19 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index c78f60e1ba5d..cc6c2908fb12 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -273,28 +273,41 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req) queue_interrupt(fc, req); } - if (req->force) { - spin_unlock(&fc->lock); - wait_event(req->waitq, req->state == FUSE_REQ_FINISHED); - spin_lock(&fc->lock); - } else { + if (!req->force) { sigset_t oldset; /* Only fatal signals may interrupt this */ block_sigs(&oldset); wait_answer_interruptible(fc, req); restore_sigs(&oldset); + + if (req->aborted) + goto aborted; + if (req->state == FUSE_REQ_FINISHED) + return; + + /* Request is not yet in userspace, bail out */ + if (req->state == FUSE_REQ_PENDING) { + list_del(&req->list); + __fuse_put_request(req); + req->out.h.error = -EINTR; + return; + } } - if (req->aborted) - goto aborted; - if (req->state == FUSE_REQ_FINISHED) - return; + /* + * Either request is already in userspace, or it was forced. + * Wait it out. + */ + spin_unlock(&fc->lock); + wait_event(req->waitq, req->state == FUSE_REQ_FINISHED); + spin_lock(&fc->lock); - req->out.h.error = -EINTR; - req->aborted = 1; + if (!req->aborted) + return; aborted: + BUG_ON(req->state != FUSE_REQ_FINISHED); if (req->locked) { /* This is uninterruptible sleep, because data is being copied to/from the buffers of req. During @@ -305,14 +318,6 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req) wait_event(req->waitq, !req->locked); spin_lock(&fc->lock); } - if (req->state == FUSE_REQ_PENDING) { - list_del(&req->list); - __fuse_put_request(req); - } else if (req->state == FUSE_REQ_SENT) { - spin_unlock(&fc->lock); - wait_event(req->waitq, req->state == FUSE_REQ_FINISHED); - spin_lock(&fc->lock); - } } static unsigned len_args(unsigned numargs, struct fuse_arg *args) |