Commit e418bbc9 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring: move our reference counting into a header 



Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 36404b09

io_uring/io_uring.c

+1 −42
Original line number Diff line number Diff line
@@ -91,6 +91,7 @@ 


#include "io_uring_types.h"

#include "io_uring.h"

#include "refs.h"



#include "xattr.h"

#include "nop.h"
@@ -611,54 +612,12 @@ static inline void io_tw_lock(struct io_ring_ctx *ctx, bool *locked) 
#define io_for_each_link(pos, head) \

	for (pos = (head); pos; pos = pos->link)



/*

 * Shamelessly stolen from the mm implementation of page reference checking,

 * see commit f958d7b528b1 for details.

 */

#define req_ref_zero_or_close_to_overflow(req)	\

	((unsigned int) atomic_read(&(req->refs)) + 127u <= 127u)



static inline bool req_ref_inc_not_zero(struct io_kiocb *req)

{

	WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));

	return atomic_inc_not_zero(&req->refs);

}



static inline bool req_ref_put_and_test(struct io_kiocb *req)

{

	if (likely(!(req->flags & REQ_F_REFCOUNT)))

		return true;



	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));

	return atomic_dec_and_test(&req->refs);

}



static inline void req_ref_get(struct io_kiocb *req)

{

	WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));

	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));

	atomic_inc(&req->refs);

}



static inline void io_submit_flush_completions(struct io_ring_ctx *ctx)

{

	if (!wq_list_empty(&ctx->submit_state.compl_reqs))

		__io_submit_flush_completions(ctx);

}



static inline void __io_req_set_refcount(struct io_kiocb *req, int nr)

{

	if (!(req->flags & REQ_F_REFCOUNT)) {

		req->flags |= REQ_F_REFCOUNT;

		atomic_set(&req->refs, nr);

	}

}



static inline void io_req_set_refcount(struct io_kiocb *req)

{

	__io_req_set_refcount(req, 1);

}



#define IO_RSRC_REF_BATCH	100



static void io_rsrc_put_node(struct io_rsrc_node *node, int nr)

io_uring/refs.h

0 → 100644
+48 −0
Original line number Diff line number Diff line 
#ifndef IOU_REQ_REF_H

#define IOU_REQ_REF_H



#include <linux/atomic.h>

#include "io_uring_types.h"



/*

 * Shamelessly stolen from the mm implementation of page reference checking,

 * see commit f958d7b528b1 for details.

 */

#define req_ref_zero_or_close_to_overflow(req)	\

	((unsigned int) atomic_read(&(req->refs)) + 127u <= 127u)



static inline bool req_ref_inc_not_zero(struct io_kiocb *req)

{

	WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));

	return atomic_inc_not_zero(&req->refs);

}



static inline bool req_ref_put_and_test(struct io_kiocb *req)

{

	if (likely(!(req->flags & REQ_F_REFCOUNT)))

		return true;



	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));

	return atomic_dec_and_test(&req->refs);

}



static inline void req_ref_get(struct io_kiocb *req)

{

	WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));

	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));

	atomic_inc(&req->refs);

}



static inline void __io_req_set_refcount(struct io_kiocb *req, int nr)

{

	if (!(req->flags & REQ_F_REFCOUNT)) {

		req->flags |= REQ_F_REFCOUNT;

		atomic_set(&req->refs, nr);

	}

}



static inline void io_req_set_refcount(struct io_kiocb *req)

{

	__io_req_set_refcount(req, 1);

}

#endif