Messages in this thread Patch in this message | | | Subject | [PATCH 5/6] fuse: fix synchronous case of fuse_file_put() | From | Maxim Patlasov <> | Date | Thu, 21 Aug 2014 20:09:25 +0400 |
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If fuse_file_put() is called with sync==true, the user may be blocked for a while, until userspace ACKs our FUSE_RELEASE request. This blocking must be uninterruptible. Otherwise request could be interrupted, but file association in user space remains.
Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com> --- fs/fuse/file.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index cd55488..b92143a 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -136,6 +136,10 @@ static void fuse_file_put(struct fuse_file *ff, bool sync) path_put(&req->misc.release.path); fuse_put_request(ff->fc, req); } else if (sync) { + /* Must force. Otherwise request could be interrupted, + * but file association in user space remains. + */ + req->force = 1; req->background = 0; fuse_request_send(ff->fc, req); path_put(&req->misc.release.path);
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