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io_uring: add 'io_comp_state' to struct io_submit_state

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No functional changes in this patch, just in preparation for passing back
pending completions to the caller and completing them in a batched
fashion.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-06-22 09:29:15 -06:00
parent e1e16097e2
commit 013538bd65
1 changed files with 16 additions and 2 deletions
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18
fs/io_uring.c
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@ -678,6 +678,12 @@ struct io_kiocb {
#define IO_IOPOLL_BATCH 8
struct io_comp_state {
unsigned int nr;
struct list_head list;
struct io_ring_ctx *ctx;
};
struct io_submit_state {
struct blk_plug plug;
@ -687,6 +693,11 @@ struct io_submit_state {
void *reqs[IO_IOPOLL_BATCH];
unsigned int free_reqs;
/*
* Batch completion logic
*/
struct io_comp_state comp;
/*
* File reference cache
*/
@ -6006,12 +6017,15 @@ static void io_submit_state_end(struct io_submit_state *state)
* Start submission side cache.
*/
static void io_submit_state_start(struct io_submit_state *state,
unsigned int max_ios)
struct io_ring_ctx *ctx, unsigned int max_ios)
{
blk_start_plug(&state->plug);
#ifdef CONFIG_BLOCK
state->plug.nowait = true;
#endif
state->comp.nr = 0;
INIT_LIST_HEAD(&state->comp.list);
state->comp.ctx = ctx;
state->free_reqs = 0;
state->file = NULL;
state->ios_left = max_ios;
@ -6146,7 +6160,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
if (!percpu_ref_tryget_many(&ctx->refs, nr))
return -EAGAIN;
io_submit_state_start(&state, nr);
io_submit_state_start(&state, ctx, nr);
ctx->ring_fd = ring_fd;
ctx->ring_file = ring_file;