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authorPavel Begunkov <asml.silence@gmail.com>2022-07-12 23:52:45 +0300
committerJens Axboe <axboe@kernel.dk>2022-07-25 03:41:07 +0300
commit092aeedb750a9fad0f0252d6067fc91d76ca44bd (patch)
tree2984fc0423d4711b3838fc2f71eb39afb0c9ef15 /io_uring
parente29e3bd4b968d50bfb3bbdcee6bfdc340f7792cf (diff)
downloadlinux-092aeedb750a9fad0f0252d6067fc91d76ca44bd.tar.xz
io_uring: allow to pass addr into sendzc
Allow to specify an address to zerocopy sends making it more like sendto(2). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/70417a8f7c5b51ab454690bae08adc0c187f89e8.1657643355.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
-rw-r--r--io_uring/net.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/io_uring/net.c b/io_uring/net.c
index 2d04a70b0632..61414d865cd7 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -67,6 +67,8 @@ struct io_sendzc {
u16 slot_idx;
unsigned msg_flags;
unsigned flags;
+ unsigned addr_len;
+ void __user *addr;
};
#define IO_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED)
@@ -848,8 +850,7 @@ int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_sendzc *zc = io_kiocb_to_cmd(req);
- if (READ_ONCE(sqe->addr2) || READ_ONCE(sqe->__pad2[0]) ||
- READ_ONCE(sqe->addr3))
+ if (READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3))
return -EINVAL;
zc->flags = READ_ONCE(sqe->ioprio);
@@ -862,6 +863,10 @@ int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
zc->slot_idx = READ_ONCE(sqe->notification_idx);
if (zc->msg_flags & MSG_DONTWAIT)
req->flags |= REQ_F_NOWAIT;
+
+ zc->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2));
+ zc->addr_len = READ_ONCE(sqe->addr_len);
+
#ifdef CONFIG_COMPAT
if (req->ctx->compat)
zc->msg_flags |= MSG_CMSG_COMPAT;
@@ -871,6 +876,7 @@ int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
{
+ struct sockaddr_storage address;
struct io_ring_ctx *ctx = req->ctx;
struct io_sendzc *zc = io_kiocb_to_cmd(req);
struct io_notif_slot *notif_slot;
@@ -908,6 +914,14 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
return ret;
mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
+ if (zc->addr) {
+ ret = move_addr_to_kernel(zc->addr, zc->addr_len, &address);
+ if (unlikely(ret < 0))
+ return ret;
+ msg.msg_name = (struct sockaddr *)&address;
+ msg.msg_namelen = zc->addr_len;
+ }
+
msg_flags = zc->msg_flags | MSG_ZEROCOPY;
if (issue_flags & IO_URING_F_NONBLOCK)
msg_flags |= MSG_DONTWAIT;