io_uring: ensure that fsnotify is always called

[ Upstream commit f63cf5192fe3418ad5ae1a4412eba5694b145f79 ]

Ensure that we call fsnotify_modify() if we write a file, and that we
do fsnotify_access() if we read it. This enables anyone using inotify
on the file to get notified.

Ditto for fallocate, ensure that fsnotify_modify() is called.

Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 1893237..0c5dcda 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2686,8 +2686,12 @@ static bool io_rw_should_reissue(struct io_kiocb *req)
 
 static bool __io_complete_rw_common(struct io_kiocb *req, long res)
 {
-       if (req->rw.kiocb.ki_flags & IOCB_WRITE)
+       if (req->rw.kiocb.ki_flags & IOCB_WRITE) {
                kiocb_end_write(req);
+               fsnotify_modify(req->file);
+       } else {
+               fsnotify_access(req->file);
+       }
        if (res != req->result) {
                if ((res == -EAGAIN || res == -EOPNOTSUPP) &&
                    io_rw_should_reissue(req)) {
@@ -4183,6 +4187,8 @@ static int io_fallocate(struct io_kiocb *req, unsigned int issue_flags)
                                req->sync.len);
        if (ret < 0)
                req_set_fail(req);
+       else
+               fsnotify_modify(req->file);
        io_req_complete(req, ret);
        return 0;
 }