user/sven/linux.git/fs/fuse/dev.c, branch v4.4.4

fs/fuse: fix ioctl type confusion

2015-08-16T19:35:44Z

fuse_dev_ioctl() performed fuse_get_dev() on a user-supplied fd, leading to a type confusion issue. Fix it by checking file->f_op. Signed-off-by: Jann Horn Acked-by: Miklos Szeredi Signed-off-by: Linus Torvalds

fuse: separate pqueue for clones

2015-07-01T14:26:09Z

Make each fuse device clone refer to a separate processing queue. The only constraint on userspace code is that the request answer must be written to the same device clone as it was read off. Signed-off-by: Miklos Szeredi

fuse: introduce per-instance fuse_dev structure

2015-07-01T14:26:08Z

Allow fuse device clones to refer to be distinguished. This patch just adds the infrastructure by associating a separate "struct fuse_dev" with each clone. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: device fd clone

2015-07-01T14:26:08Z

Allow an open fuse device to be "cloned". Userspace can create a clone by: newfd = open("/dev/fuse", O_RDWR) ioctl(newfd, FUSE_DEV_IOC_CLONE, &oldfd); At this point newfd will refer to the same fuse connection as oldfd. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: abort: no fc->lock needed for request ending

2015-07-01T14:26:08Z

In fuse_abort_conn() when all requests are on private lists we no longer need fc->lock protection. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: no fc->lock for pqueue parts

2015-07-01T14:26:07Z

Remove fc->lock protection from processing queue members, now protected by fpq->lock. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: no fc->lock in request_end()

2015-07-01T14:26:07Z

No longer need to call request_end() with the connection lock held. We still protect the background counters and queue with fc->lock, so acquire it if necessary. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: cleanup request_end()

2015-07-01T14:26:07Z

Now that we atomically test having already done everything we no longer need other protection. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: request_end(): do once

2015-07-01T14:26:06Z

When the connection is aborted it is possible that request_end() will be called twice. Use atomic test and set to do the actual ending only once. test_and_set_bit() also provides the necessary barrier semantics so no explicit smp_wmb() is necessary. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant

fuse: add req flag for private list

2015-07-01T14:26:06Z

When an unlocked request is aborted, it is moved from fpq->io to a private list. Then, after unlocking fpq->lock, the private list is processed and the requests are finished off. To protect the private list, we need to mark the request with a flag, so if in the meantime the request is unlocked the list is not corrupted. Signed-off-by: Miklos Szeredi Reviewed-by: Ashish Samant