Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
io_uring/cancel: add generic cancel helper
Any opcode that is cancelable ends up defining its own cancel helper
for finding and canceling a specific request. Add a generic helper that
can be used for this purpose.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
+25
+21
io_uring/cancel.c
+21
io_uring/cancel.c
···
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return found;
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}
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+
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+
int io_cancel_remove(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
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unsigned int issue_flags, struct hlist_head *list,
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bool (*cancel)(struct io_kiocb *))
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{
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struct hlist_node *tmp;
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struct io_kiocb *req;
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int nr = 0;
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+
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io_ring_submit_lock(ctx, issue_flags);
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hlist_for_each_entry_safe(req, tmp, list, hash_node) {
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if (!io_cancel_req_match(req, cd))
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continue;
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if (cancel(req))
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nr++;
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if (!(cd->flags & IORING_ASYNC_CANCEL_ALL))
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break;
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}
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io_ring_submit_unlock(ctx, issue_flags);
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return nr ?: -ENOENT;
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+
}
+4
io_uring/cancel.h
+4
io_uring/cancel.h
···
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struct hlist_head *list, bool cancel_all,
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bool (*cancel)(struct io_kiocb *));
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+
int io_cancel_remove(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
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+
unsigned int issue_flags, struct hlist_head *list,
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+
bool (*cancel)(struct io_kiocb *));
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+
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static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence)
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{
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if (req->cancel_seq_set && sequence == req->work.cancel_seq)