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io_uring-6.0-2022-09-09 

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Merge tag 'io_uring-6.0-2022-09-09' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - Removed function that became unused after last week's merge (Jiapeng)

 - Two small fixes for kbuf recycling (Pavel)

 - Include address copy for zc send for POLLFIRST (Pavel)

 - Fix for short IO handling in the normal read/write path (Pavel)

* tag 'io_uring-6.0-2022-09-09' of git://git.kernel.dk/linux-block:
  io_uring/rw: fix short rw error handling
  io_uring/net: copy addr for zc on POLL_FIRST
  io_uring: recycle kbuf recycle on tw requeue
  io_uring/kbuf: fix not advancing READV kbuf ring
  io_uring/notif: Remove the unused function io_notif_complete()
This commit is contained in:
Linus Torvalds 2022-09-09 14:57:18 -04:00
parent 0099baa879 4d9cb92ca4
commit d2b768c3d4
5 changed files with 29 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
io_uring/io_uring.c
View File

@ -1728,6 +1728,7 @@ static void io_queue_async(struct io_kiocb *req, int ret)
switch (io_arm_poll_handler(req, 0)) {
case IO_APOLL_READY:
io_kbuf_recycle(req, 0);
io_req_task_queue(req);
break;
case IO_APOLL_ABORTED:

8
io_uring/kbuf.h
View File

@ -91,9 +91,13 @@ static inline void io_kbuf_recycle(struct io_kiocb *req, unsigned issue_flags)
* buffer data. However if that buffer is recycled the original request
* data stored in addr is lost. Therefore forbid recycling for now.
*/
if (req->opcode == IORING_OP_READV)
if (req->opcode == IORING_OP_READV) {
if ((req->flags & REQ_F_BUFFER_RING) && req->buf_list) {
req->buf_list->head++;
req->buf_list = NULL;
}
return;
}
if (req->flags & REQ_F_BUFFER_SELECTED)
io_kbuf_recycle_legacy(req, issue_flags);
if (req->flags & REQ_F_BUFFER_RING)

7
io_uring/net.c
View File

@ -1003,9 +1003,6 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
unsigned msg_flags, cflags;
int ret, min_ret = 0;
if (!(req->flags & REQ_F_POLLED) &&
(zc->flags & IORING_RECVSEND_POLL_FIRST))
return -EAGAIN;
sock = sock_from_file(req->file);
if (unlikely(!sock))
return -ENOTSOCK;
@ -1030,6 +1027,10 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
msg.msg_namelen = zc->addr_len;
}
if (!(req->flags & REQ_F_POLLED) &&
(zc->flags & IORING_RECVSEND_POLL_FIRST))
return io_setup_async_addr(req, addr, issue_flags);
if (zc->flags & IORING_RECVSEND_FIXED_BUF) {
ret = io_import_fixed(WRITE, &msg.msg_iter, req->imu,
(u64)(uintptr_t)zc->buf, zc->len);

8
io_uring/notif.c
View File

@ -21,14 +21,6 @@ static void __io_notif_complete_tw(struct io_kiocb *notif, bool *locked)
io_req_task_complete(notif, locked);
}
static inline void io_notif_complete(struct io_kiocb *notif)
__must_hold(&notif->ctx->uring_lock)
{
bool locked = true;
__io_notif_complete_tw(notif, &locked);
}
static void io_uring_tx_zerocopy_callback(struct sk_buff *skb,
struct ubuf_info *uarg,
bool success)

30
io_uring/rw.c
View File

@ -206,6 +206,20 @@ static bool __io_complete_rw_common(struct io_kiocb *req, long res)
return false;
}
static inline unsigned io_fixup_rw_res(struct io_kiocb *req, unsigned res)
{
struct io_async_rw *io = req->async_data;
/* add previously done IO, if any */
if (req_has_async_data(req) && io->bytes_done > 0) {
if (res < 0)
res = io->bytes_done;
else
res += io->bytes_done;
}
return res;
}
static void io_complete_rw(struct kiocb *kiocb, long res)
{
struct io_rw *rw = container_of(kiocb, struct io_rw, kiocb);
@ -213,7 +227,7 @@ static void io_complete_rw(struct kiocb *kiocb, long res)
if (__io_complete_rw_common(req, res))
return;
io_req_set_res(req, res, 0);
io_req_set_res(req, io_fixup_rw_res(req, res), 0);
req->io_task_work.func = io_req_task_complete;
io_req_task_work_add(req);
}
@ -240,22 +254,14 @@ static void io_complete_rw_iopoll(struct kiocb *kiocb, long res)
static int kiocb_done(struct io_kiocb *req, ssize_t ret,
unsigned int issue_flags)
{
struct io_async_rw *io = req->async_data;
struct io_rw *rw = io_kiocb_to_cmd(req, struct io_rw);
/* add previously done IO, if any */
if (req_has_async_data(req) && io->bytes_done > 0) {
if (ret < 0)
ret = io->bytes_done;
else
ret += io->bytes_done;
}
unsigned final_ret = io_fixup_rw_res(req, ret);
if (req->flags & REQ_F_CUR_POS)
req->file->f_pos = rw->kiocb.ki_pos;
if (ret >= 0 && (rw->kiocb.ki_complete == io_complete_rw)) {
if (!__io_complete_rw_common(req, ret)) {
io_req_set_res(req, req->cqe.res,
io_req_set_res(req, final_ret,
io_put_kbuf(req, issue_flags));
return IOU_OK;
}
@ -268,7 +274,7 @@ static int kiocb_done(struct io_kiocb *req, ssize_t ret,
if (io_resubmit_prep(req))
io_req_task_queue_reissue(req);
else
io_req_task_queue_fail(req, ret);
io_req_task_queue_fail(req, final_ret);
}
return IOU_ISSUE_SKIP_COMPLETE;
}