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io_uring: take comp_state from ctx 

__io_queue_sqe() is always called with a non-NULL comp_state, which is
taken directly from context. Don't pass it around but infer from ctx.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-02-10 00:03:22 +00:00 committed by Jens Axboe
parent 65453d1efb
commit c5eef2b944
1 changed files with 18 additions and 19 deletions
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37
fs/io_uring.c
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@ -1042,7 +1042,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
static void __io_clean_op(struct io_kiocb *req);
static struct file *io_file_get(struct io_submit_state *state,
struct io_kiocb *req, int fd, bool fixed);
static void __io_queue_sqe(struct io_kiocb *req, struct io_comp_state *cs);
static void __io_queue_sqe(struct io_kiocb *req);
static void io_rsrc_put_work(struct work_struct *work);
static int io_import_iovec(int rw, struct io_kiocb *req, struct iovec **iovec,
@ -2300,7 +2300,7 @@ static void __io_req_task_submit(struct io_kiocb *req)
if (!ctx->sqo_dead &&
!__io_sq_thread_acquire_mm(ctx) &&
!__io_sq_thread_acquire_files(ctx))
__io_queue_sqe(req, &ctx->submit_state.comp);
__io_queue_sqe(req);
else
__io_req_task_cancel(req, -EFAULT);
mutex_unlock(&ctx->uring_lock);
@ -6551,14 +6551,12 @@ static struct io_kiocb *io_prep_linked_timeout(struct io_kiocb *req)
return nxt;
}
static void __io_queue_sqe(struct io_kiocb *req, struct io_comp_state *cs)
static void __io_queue_sqe(struct io_kiocb *req)
{
struct io_kiocb *linked_timeout;
const struct cred *old_creds = NULL;
int ret, issue_flags = IO_URING_F_NONBLOCK;
int ret;
if (cs)
issue_flags |= IO_URING_F_COMPLETE_DEFER;
again:
linked_timeout = io_prep_linked_timeout(req);
@ -6573,7 +6571,7 @@ again:
old_creds = override_creds(req->work.identity->creds);
}
ret = io_issue_sqe(req, issue_flags);
ret = io_issue_sqe(req, IO_URING_F_NONBLOCK|IO_URING_F_COMPLETE_DEFER);
/*
* We async punt it if the file wasn't marked NOWAIT, or if the file
@ -6593,9 +6591,12 @@ again:
} else if (likely(!ret)) {
/* drop submission reference */
if (req->flags & REQ_F_COMPLETE_INLINE) {
struct io_ring_ctx *ctx = req->ctx;
struct io_comp_state *cs = &ctx->submit_state.comp;
cs->reqs[cs->nr++] = req;
if (cs->nr == IO_COMPL_BATCH)
io_submit_flush_completions(cs, req->ctx);
io_submit_flush_completions(cs, ctx);
req = NULL;
} else {
req = io_put_req_find_next(req);
@ -6621,8 +6622,7 @@ again:
revert_creds(old_creds);
}
static void io_queue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
struct io_comp_state *cs)
static void io_queue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
int ret;
@ -6647,18 +6647,17 @@ fail_req:
if (unlikely(ret))
goto fail_req;
}
__io_queue_sqe(req, cs);
__io_queue_sqe(req);
}
}
static inline void io_queue_link_head(struct io_kiocb *req,
struct io_comp_state *cs)
static inline void io_queue_link_head(struct io_kiocb *req)
{
if (unlikely(req->flags & REQ_F_FAIL_LINK)) {
io_put_req(req);
io_req_complete(req, -ECANCELED);
} else
io_queue_sqe(req, NULL, cs);
io_queue_sqe(req, NULL);
}
struct io_submit_link {
@ -6667,7 +6666,7 @@ struct io_submit_link {
};
static int io_submit_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
struct io_submit_link *link, struct io_comp_state *cs)
struct io_submit_link *link)
{
struct io_ring_ctx *ctx = req->ctx;
int ret;
@ -6705,7 +6704,7 @@ static int io_submit_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
/* last request of a link, enqueue the link */
if (!(req->flags & (REQ_F_LINK | REQ_F_HARDLINK))) {
io_queue_link_head(head, cs);
io_queue_link_head(head);
link->head = NULL;
}
} else {
@ -6720,7 +6719,7 @@ static int io_submit_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
link->head = req;
link->last = req;
} else {
io_queue_sqe(req, sqe, cs);
io_queue_sqe(req, sqe);
}
}
@ -6961,7 +6960,7 @@ fail_req:
trace_io_uring_submit_sqe(ctx, req->opcode, req->user_data,
true, ctx->flags & IORING_SETUP_SQPOLL);
err = io_submit_sqe(req, sqe, &link, &ctx->submit_state.comp);
err = io_submit_sqe(req, sqe, &link);
if (err)
goto fail_req;
}
@ -6976,7 +6975,7 @@ fail_req:
put_task_struct_many(current, unused);
}
if (link.head)
io_queue_link_head(link.head, &ctx->submit_state.comp);
io_queue_link_head(link.head);
io_submit_state_end(&ctx->submit_state, ctx);
/* Commit SQ ring head once we've consumed and submitted all SQEs */