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io_uring/cancel: add generic remove_all helper

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Any opcode that is cancelable ends up defining its own remove all
helper, which iterates the pending list and cancels matches. Add a
generic helper for it, which can be used by them.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2025-02-05 12:48:56 -07:00
parent 5d3e51240d
commit 1533376b13
2 changed files with 25 additions and 0 deletions
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21
io_uring/cancel.c
View File

@@ -341,3 +341,24 @@ int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg)
fput(file);
return ret;
}
bool io_cancel_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
struct hlist_head *list, bool cancel_all,
bool (*cancel)(struct io_kiocb *))
{
struct hlist_node *tmp;
struct io_kiocb *req;
bool found = false;
lockdep_assert_held(&ctx->uring_lock);
hlist_for_each_entry_safe(req, tmp, list, hash_node) {
if (!io_match_task_safe(req, tctx, cancel_all))
continue;
hlist_del_init(&req->hash_node);
if (cancel(req))
found = true;
}
return found;
}

4
io_uring/cancel.h
View File

@@ -24,6 +24,10 @@ int io_try_cancel(struct io_uring_task *tctx, struct io_cancel_data *cd,
int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg);
bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd);
bool io_cancel_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
struct hlist_head *list, bool cancel_all,
bool (*cancel)(struct io_kiocb *));
static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence)
{
if (req->cancel_seq_set && sequence == req->work.cancel_seq)