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Revision d9aba2b40de6fddd83f2fe3a5ac2bcd2c98fa66b authored by Trond Myklebust on 16 July 2019, 19:38:28 UTC, committed by Trond Myklebust on 18 July 2019, 18:43:52 UTC 
NFSv4: Don't use the zero stateid with layoutget
 
The NFSv4.1 protocol explicitly forbids us from using the zero stateid
together with layoutget, so when we see that nfs4_select_rw_stateid()
is unable to return a valid delegation, lock or open stateid, then
we should initiate recovery and retry.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
1 parent 7402a4f
Raw File
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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