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提交 007dcf2e 编写于 作者: P Pavel Begunkov 提交者： Shile Zhang
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io_uring: use inlined struct sqe_submit 

commit 267bc90442aa47002e2991f7d9dd141e168b466b upstream.

req->submit is always up-to-date, use it directly
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
上级 fc1a5d21
隐藏空白更改
内联 并排
Showing with 43 addition and 44 deletion
fs/io_uring.c
浏览文件 @ 007dcf2e
......@@ -1154,10 +1154,9 @@ static bool io_file_supports_async(struct file *file)
return false;
}
static int io_prep_rw(struct io_kiocb *req, const struct sqe_submit *s,
bool force_nonblock)
static int io_prep_rw(struct io_kiocb *req, bool force_nonblock)
{
const struct io_uring_sqe *sqe = s->sqe;
const struct io_uring_sqe *sqe = req->submit.sqe;
struct io_ring_ctx *ctx = req->ctx;
struct kiocb *kiocb = &req->rw;
unsigned ioprio;
......@@ -1406,8 +1405,8 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb,
return ret;
}
static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
struct io_kiocb **nxt, bool force_nonblock)
static int io_read(struct io_kiocb *req, struct io_kiocb **nxt,
bool force_nonblock)
{
struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
struct kiocb *kiocb = &req->rw;
......@@ -1416,7 +1415,7 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
size_t iov_count;
ssize_t read_size, ret;
ret = io_prep_rw(req, s, force_nonblock);
ret = io_prep_rw(req, force_nonblock);
if (ret)
return ret;
file = kiocb->ki_filp;
......@@ -1424,7 +1423,7 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
if (unlikely(!(file->f_mode & FMODE_READ)))
return -EBADF;
ret = io_import_iovec(req->ctx, READ, s, &iovec, &iter);
ret = io_import_iovec(req->ctx, READ, &req->submit, &iovec, &iter);
if (ret < 0)
return ret;
......@@ -1456,7 +1455,7 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
ret2 = -EAGAIN;
/* Catch -EAGAIN return for forced non-blocking submission */
if (!force_nonblock || ret2 != -EAGAIN)
kiocb_done(kiocb, ret2, nxt, s->in_async);
kiocb_done(kiocb, ret2, nxt, req->submit.in_async);
else
ret = -EAGAIN;
}
......@@ -1464,8 +1463,8 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
return ret;
}
static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
struct io_kiocb **nxt, bool force_nonblock)
static int io_write(struct io_kiocb *req, struct io_kiocb **nxt,
bool force_nonblock)
{
struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
struct kiocb *kiocb = &req->rw;
......@@ -1474,7 +1473,7 @@ static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
size_t iov_count;
ssize_t ret;
ret = io_prep_rw(req, s, force_nonblock);
ret = io_prep_rw(req, force_nonblock);
if (ret)
return ret;
......@@ -1482,7 +1481,7 @@ static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
if (unlikely(!(file->f_mode & FMODE_WRITE)))
return -EBADF;
ret = io_import_iovec(req->ctx, WRITE, s, &iovec, &iter);
ret = io_import_iovec(req->ctx, WRITE, &req->submit, &iovec, &iter);
if (ret < 0)
return ret;
......@@ -1519,7 +1518,7 @@ static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
else
ret2 = loop_rw_iter(WRITE, file, kiocb, &iter);
if (!force_nonblock || ret2 != -EAGAIN)
kiocb_done(kiocb, ret2, nxt, s->in_async);
kiocb_done(kiocb, ret2, nxt, req->submit.in_async);
else
ret = -EAGAIN;
}
......@@ -2188,9 +2187,9 @@ static int io_async_cancel(struct io_kiocb *req, const struct io_uring_sqe *sqe,
return 0;
}
static int io_req_defer(struct io_ring_ctx *ctx, struct io_kiocb *req,
const struct io_uring_sqe *sqe)
static int io_req_defer(struct io_ring_ctx *ctx, struct io_kiocb *req)
{
const struct io_uring_sqe *sqe = req->submit.sqe;
struct io_uring_sqe *sqe_copy;
if (!io_sequence_defer(ctx, req) && list_empty(&ctx->defer_list))
......@@ -2217,10 +2216,10 @@ static int io_req_defer(struct io_ring_ctx *ctx, struct io_kiocb *req,
}
static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
const struct sqe_submit *s, struct io_kiocb **nxt,
bool force_nonblock)
struct io_kiocb **nxt, bool force_nonblock)
{
int ret, opcode;
struct sqe_submit *s = &req->submit;
req->user_data = READ_ONCE(s->sqe->user_data);
......@@ -2232,18 +2231,18 @@ static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
case IORING_OP_READV:
if (unlikely(s->sqe->buf_index))
return -EINVAL;
ret = io_read(req, s, nxt, force_nonblock);
ret = io_read(req, nxt, force_nonblock);
break;
case IORING_OP_WRITEV:
if (unlikely(s->sqe->buf_index))
return -EINVAL;
ret = io_write(req, s, nxt, force_nonblock);
ret = io_write(req, nxt, force_nonblock);
break;
case IORING_OP_READ_FIXED:
ret = io_read(req, s, nxt, force_nonblock);
ret = io_read(req, nxt, force_nonblock);
break;
case IORING_OP_WRITE_FIXED:
ret = io_write(req, s, nxt, force_nonblock);
ret = io_write(req, nxt, force_nonblock);
break;
case IORING_OP_FSYNC:
ret = io_fsync(req, s->sqe, nxt, force_nonblock);
......@@ -2318,7 +2317,7 @@ static void io_wq_submit_work(struct io_wq_work **workptr)
s->has_user = (work->flags & IO_WQ_WORK_HAS_MM) != 0;
s->in_async = true;
do {
ret = __io_submit_sqe(ctx, req, s, &nxt, false);
ret = __io_submit_sqe(ctx, req, &nxt, false);
/*
* We can get EAGAIN for polled IO even though we're
* forcing a sync submission from here, since we can't
......@@ -2372,9 +2371,10 @@ static inline struct file *io_file_from_index(struct io_ring_ctx *ctx,
return table->files[index & IORING_FILE_TABLE_MASK];
}
static int io_req_set_file(struct io_ring_ctx *ctx, const struct sqe_submit *s,
static int io_req_set_file(struct io_ring_ctx *ctx,
struct io_submit_state *state, struct io_kiocb *req)
{
struct sqe_submit *s = &req->submit;
unsigned flags;
int fd;
......@@ -2438,12 +2438,11 @@ static int io_grab_files(struct io_ring_ctx *ctx, struct io_kiocb *req)
return ret;
}
static int __io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
struct sqe_submit *s)
static int __io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req)
{
int ret;
ret = __io_submit_sqe(ctx, req, s, NULL, true);
ret = __io_submit_sqe(ctx, req, NULL, true);
/*
* We async punt it if the file wasn't marked NOWAIT, or if the file
......@@ -2451,6 +2450,7 @@ static int __io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
*/
if (ret == -EAGAIN && (!(req->flags & REQ_F_NOWAIT) ||
(req->flags & REQ_F_MUST_PUNT))) {
struct sqe_submit *s = &req->submit;
struct io_uring_sqe *sqe_copy;
sqe_copy = kmemdup(s->sqe, sizeof(*sqe_copy), GFP_KERNEL);
......@@ -2488,31 +2488,30 @@ static int __io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
return ret;
}
static int io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
struct sqe_submit *s)
static int io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req)
{
int ret;
ret = io_req_defer(ctx, req, s->sqe);
ret = io_req_defer(ctx, req);
if (ret) {
if (ret != -EIOCBQUEUED) {
io_cqring_add_event(ctx, req->submit.sqe->user_data, ret);
io_free_req(req, NULL);
io_cqring_add_event(ctx, s->sqe->user_data, ret);
}
return 0;
}
return __io_queue_sqe(ctx, req, s);
return __io_queue_sqe(ctx, req);
}
static int io_queue_link_head(struct io_ring_ctx *ctx, struct io_kiocb *req,
struct sqe_submit *s, struct io_kiocb *shadow)
struct io_kiocb *shadow)
{
int ret;
int need_submit = false;
if (!shadow)
return io_queue_sqe(ctx, req, s);
return io_queue_sqe(ctx, req);
/*
* Mark the first IO in link list as DRAIN, let all the following
......@@ -2520,12 +2519,12 @@ static int io_queue_link_head(struct io_ring_ctx *ctx, struct io_kiocb *req,
* list.
*/
req->flags |= REQ_F_IO_DRAIN;
ret = io_req_defer(ctx, req, s->sqe);
ret = io_req_defer(ctx, req);
if (ret) {
if (ret != -EIOCBQUEUED) {
io_cqring_add_event(ctx, req->submit.sqe->user_data, ret);
io_free_req(req, NULL);
__io_free_req(shadow);
io_cqring_add_event(ctx, s->sqe->user_data, ret);
return 0;
}
} else {
......@@ -2543,7 +2542,7 @@ static int io_queue_link_head(struct io_ring_ctx *ctx, struct io_kiocb *req,
spin_unlock_irq(&ctx->completion_lock);
if (need_submit)
return __io_queue_sqe(ctx, req, s);
return __io_queue_sqe(ctx, req);
return 0;
}
......@@ -2551,10 +2550,10 @@ static int io_queue_link_head(struct io_ring_ctx *ctx, struct io_kiocb *req,
#define SQE_VALID_FLAGS (IOSQE_FIXED_FILE|IOSQE_IO_DRAIN|IOSQE_IO_LINK)
static void io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
struct sqe_submit *s, struct io_submit_state *state,
struct io_kiocb **link)
struct io_submit_state *state, struct io_kiocb **link)
{
struct io_uring_sqe *sqe_copy;
struct sqe_submit *s = &req->submit;
int ret;
/* enforce forwards compatibility on users */
......@@ -2563,11 +2562,11 @@ static void io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
goto err_req;
}
ret = io_req_set_file(ctx, s, state, req);
ret = io_req_set_file(ctx, state, req);
if (unlikely(ret)) {
err_req:
io_free_req(req, NULL);
io_cqring_add_event(ctx, s->sqe->user_data, ret);
io_free_req(req, NULL);
return;
}
......@@ -2598,7 +2597,7 @@ static void io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
INIT_LIST_HEAD(&req->link_list);
*link = req;
} else {
io_queue_sqe(ctx, req, s);
io_queue_sqe(ctx, req);
}
}
......@@ -2742,7 +2741,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
req->submit.needs_fixed_file = async;
trace_io_uring_submit_sqe(ctx, req->submit.sqe->user_data,
true, async);
io_submit_sqe(ctx, req, &req->submit, statep, &link);
io_submit_sqe(ctx, req, statep, &link);
submitted++;
/*
......@@ -2750,14 +2749,14 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
* that's the end of the chain. Submit the previous link.
*/
if (!(sqe_flags & IOSQE_IO_LINK) && link) {
io_queue_link_head(ctx, link, &link->submit, shadow_req);
io_queue_link_head(ctx, link, shadow_req);
link = NULL;
shadow_req = NULL;
}
}
if (link)
io_queue_link_head(ctx, link, &link->submit, shadow_req);
io_queue_link_head(ctx, link, shadow_req);
if (statep)
io_submit_state_end(&state);
......
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