Revision 2e6e1fde32d7d41cf076c21060c329d3fdbce25c authored by Pavel Begunkov on 05 December 2019, 13:15:45 UTC, committed by Jens Axboe on 05 December 2019, 13:54:51 UTC
In case of an error io_submit_sqe() drops a request and continues without it, even if the request was a part of a link. Not only it doesn't cancel links, but also may execute wrong sequence of actions. Stop consuming sqes, and let the user handle errors. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 78076bb
blk-mq-debugfs.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef INT_BLK_MQ_DEBUGFS_H
#define INT_BLK_MQ_DEBUGFS_H
#ifdef CONFIG_BLK_DEBUG_FS
#include <linux/seq_file.h>
struct blk_mq_debugfs_attr {
const char *name;
umode_t mode;
int (*show)(void *, struct seq_file *);
ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
/* Set either .show or .seq_ops. */
const struct seq_operations *seq_ops;
};
int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
void blk_mq_debugfs_register(struct request_queue *q);
void blk_mq_debugfs_unregister(struct request_queue *q);
void blk_mq_debugfs_register_hctx(struct request_queue *q,
struct blk_mq_hw_ctx *hctx);
void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
void blk_mq_debugfs_register_hctxs(struct request_queue *q);
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
void blk_mq_debugfs_register_sched(struct request_queue *q);
void blk_mq_debugfs_unregister_sched(struct request_queue *q);
void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
struct blk_mq_hw_ctx *hctx);
void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
void blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q);
#else
static inline void blk_mq_debugfs_register(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_unregister(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_register_hctx(struct request_queue *q,
struct blk_mq_hw_ctx *hctx)
{
}
static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
{
}
static inline void blk_mq_debugfs_register_hctxs(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_register_sched(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
{
}
static inline void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
struct blk_mq_hw_ctx *hctx)
{
}
static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
{
}
static inline void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
{
}
static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
{
}
static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
{
}
#endif
#ifdef CONFIG_BLK_DEBUG_FS_ZONED
int queue_zone_wlock_show(void *data, struct seq_file *m);
#else
static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
{
return 0;
}
#endif
#endif
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