Commit 733c43f1 authored by Caleb Sander Mateos's avatar Caleb Sander Mateos Committed by Jens Axboe
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io_uring/cmd: introduce IORING_URING_CMD_REISSUE flag 



Add a flag IORING_URING_CMD_REISSUE that ->uring_cmd() implementations
can use to tell whether this is the first or subsequent issue of the
uring_cmd. This will allow ->uring_cmd() implementations to store
information in the io_uring_cmd's pdu across issues.

Signed-off-by: default avatarCaleb Sander Mateos <csander@purestorage.com>
Acked-by: default avatarDavid Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/r/20250708202212.2851548-3-csander@purestorage.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 262ab205

include/linux/io_uring/cmd.h

+2 −0
Original line number Diff line number Diff line
@@ -8,6 +8,8 @@ 


/* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */

#define IORING_URING_CMD_CANCELABLE	(1U << 30)

/* io_uring_cmd is being issued again */

#define IORING_URING_CMD_REISSUE	(1U << 31)



struct io_uring_cmd {

	struct file	*file;

io_uring/uring_cmd.c

+5 −1
Original line number Diff line number Diff line
@@ -261,7 +261,11 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags) 
	}



	ret = file->f_op->uring_cmd(ioucmd, issue_flags);

	if (ret == -EAGAIN || ret == -EIOCBQUEUED)

	if (ret == -EAGAIN) {

		ioucmd->flags |= IORING_URING_CMD_REISSUE;

		return ret;

	}

	if (ret == -EIOCBQUEUED)

		return ret;

	if (ret < 0)

		req_set_fail(req);