[PATCH RFC v7 14/16] fuse: {uring} Handle IO_URING_F_TASK_DEAD

Bernd Schubert
2024-11-27T13:41:01Z

The ring task is terminating, it not safe to still access
its resources. Also no need for further actions.

Signed-off-by: Bernd Schubert <bschubert@ddn.com>
---
fs/fuse/dev_uring.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/dev_uring.c b/fs/fuse/dev_uring.c
index 66addb5d00c36d84a0d8d1f470f5ae10d8ee3f6f..94dc3f56d4ab604eb4b87d3b9731567e3a214b0a 100644
--- a/fs/fuse/dev_uring.c
+++ b/fs/fuse/dev_uring.c
@@ -1056,16 +1056,22 @@ fuse_uring_send_req_in_task(struct io_uring_cmd *cmd,

BUILD_BUG_ON(sizeof(pdu) > sizeof(cmd->pdu));

+ if (unlikely(issue_flags & IO_URING_F_TASK_DEAD)) {
+ err = -ECANCELED;
+ goto terminating;
+ }
+
err = fuse_uring_prepare_send(ring_ent);
if (err)
goto err;

- io_uring_cmd_done(cmd, 0, 0, issue_flags);
-
+terminating:
spin_lock(&queue->lock);
ring_ent->state = FRRS_USERSPACE;
list_move(&ring_ent->list, &queue->ent_in_userspace);
spin_unlock(&queue->lock);
+ io_uring_cmd_done(cmd, err, 0, issue_flags);
+
return;
err:
fuse_uring_next_fuse_req(ring_ent, queue);

--
2.43.0