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io_uring/net: extract io_send_select_buffer()

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Extract a helper out of io_send() for provided buffer selection to
improve readability as it has grown to take too many lines.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Link: https://lore.kernel.org/r/26a769cdabd61af7f40c5d88a22469c5ad071796.1738087204.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2025-01-28 20:56:14 +00:00 committed by Jens Axboe
parent 2b350f756b
commit 86e62354ee
1 changed files with 50 additions and 37 deletions
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87
io_uring/net.c
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@ -566,6 +566,54 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
return IOU_OK;
}
static int io_send_select_buffer(struct io_kiocb *req, unsigned int issue_flags,
struct io_async_msghdr *kmsg)
{
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
int ret;
struct buf_sel_arg arg = {
.iovs = &kmsg->fast_iov,
.max_len = min_not_zero(sr->len, INT_MAX),
.nr_iovs = 1,
};
if (kmsg->free_iov) {
arg.nr_iovs = kmsg->free_iov_nr;
arg.iovs = kmsg->free_iov;
arg.mode = KBUF_MODE_FREE;
}
if (!(sr->flags & IORING_RECVSEND_BUNDLE))
arg.nr_iovs = 1;
else
arg.mode |= KBUF_MODE_EXPAND;
ret = io_buffers_select(req, &arg, issue_flags);
if (unlikely(ret < 0))
return ret;
if (arg.iovs != &kmsg->fast_iov && arg.iovs != kmsg->free_iov) {
kmsg->free_iov_nr = ret;
kmsg->free_iov = arg.iovs;
req->flags |= REQ_F_NEED_CLEANUP;
}
sr->len = arg.out_len;
if (ret == 1) {
sr->buf = arg.iovs[0].iov_base;
ret = import_ubuf(ITER_SOURCE, sr->buf, sr->len,
&kmsg->msg.msg_iter);
if (unlikely(ret))
return ret;
} else {
iov_iter_init(&kmsg->msg.msg_iter, ITER_SOURCE,
arg.iovs, ret, arg.out_len);
}
return 0;
}
int io_send(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
@ -589,44 +637,9 @@ int io_send(struct io_kiocb *req, unsigned int issue_flags)
retry_bundle:
if (io_do_buffer_select(req)) {
struct buf_sel_arg arg = {
.iovs = &kmsg->fast_iov,
.max_len = min_not_zero(sr->len, INT_MAX),
.nr_iovs = 1,
};
if (kmsg->free_iov) {
arg.nr_iovs = kmsg->free_iov_nr;
arg.iovs = kmsg->free_iov;
arg.mode = KBUF_MODE_FREE;
}
if (!(sr->flags & IORING_RECVSEND_BUNDLE))
arg.nr_iovs = 1;
else
arg.mode |= KBUF_MODE_EXPAND;
ret = io_buffers_select(req, &arg, issue_flags);
if (unlikely(ret < 0))
ret = io_send_select_buffer(req, issue_flags, kmsg);
if (ret)
return ret;
if (arg.iovs != &kmsg->fast_iov && arg.iovs != kmsg->free_iov) {
kmsg->free_iov_nr = ret;
kmsg->free_iov = arg.iovs;
req->flags |= REQ_F_NEED_CLEANUP;
}
sr->len = arg.out_len;
if (ret == 1) {
sr->buf = arg.iovs[0].iov_base;
ret = import_ubuf(ITER_SOURCE, sr->buf, sr->len,
&kmsg->msg.msg_iter);
if (unlikely(ret))
return ret;
} else {
iov_iter_init(&kmsg->msg.msg_iter, ITER_SOURCE,
arg.iovs, ret, arg.out_len);
}
}
/*