[linux.git] / fs / xfs / xfs_sysfs.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2014 Red Hat, Inc.
 * All Rights Reserved.
 */

#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_sysfs.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_stats.h"
#include "xfs_mount.h"

struct xfs_sysfs_attr {
	struct attribute attr;
	ssize_t (*show)(struct kobject *kobject, char *buf);
	ssize_t (*store)(struct kobject *kobject, const char *buf,
			 size_t count);
};

static inline struct xfs_sysfs_attr *
to_attr(struct attribute *attr)
{
	return container_of(attr, struct xfs_sysfs_attr, attr);
}

#define XFS_SYSFS_ATTR_RW(name) \
	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
#define XFS_SYSFS_ATTR_RO(name) \
	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
#define XFS_SYSFS_ATTR_WO(name) \
	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)

#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr

STATIC ssize_t
xfs_sysfs_object_show(
	struct kobject		*kobject,
	struct attribute	*attr,
	char			*buf)
{
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
}

STATIC ssize_t
xfs_sysfs_object_store(
	struct kobject		*kobject,
	struct attribute	*attr,
	const char		*buf,
	size_t			count)
{
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
}

static const struct sysfs_ops xfs_sysfs_ops = {
	.show = xfs_sysfs_object_show,
	.store = xfs_sysfs_object_store,
};

/*
 * xfs_mount kobject. The mp kobject also serves as the per-mount parent object
 * that is identified by the fsname under sysfs.
 */

static inline struct xfs_mount *
to_mp(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);

	return container_of(kobj, struct xfs_mount, m_kobj);
}

static struct attribute *xfs_mp_attrs[] = {
	NULL,
};

struct kobj_type xfs_mp_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
	.default_attrs = xfs_mp_attrs,
};

#ifdef DEBUG
/* debug */

STATIC ssize_t
bug_on_assert_store(
	struct kobject		*kobject,
	const char		*buf,
	size_t			count)
{
	int			ret;
	int			val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val == 1)
		xfs_globals.bug_on_assert = true;
	else if (val == 0)
		xfs_globals.bug_on_assert = false;
	else
		return -EINVAL;

	return count;
}

STATIC ssize_t
bug_on_assert_show(
	struct kobject		*kobject,
	char			*buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
}
XFS_SYSFS_ATTR_RW(bug_on_assert);

STATIC ssize_t
log_recovery_delay_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val < 0 || val > 60)
		return -EINVAL;

	xfs_globals.log_recovery_delay = val;

	return count;
}

STATIC ssize_t
log_recovery_delay_show(
	struct kobject	*kobject,
	char		*buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
}
XFS_SYSFS_ATTR_RW(log_recovery_delay);

STATIC ssize_t
mount_delay_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val < 0 || val > 60)
		return -EINVAL;

	xfs_globals.mount_delay = val;

	return count;
}

STATIC ssize_t
mount_delay_show(
	struct kobject	*kobject,
	char		*buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
}
XFS_SYSFS_ATTR_RW(mount_delay);

static struct attribute *xfs_dbg_attrs[] = {
	ATTR_LIST(bug_on_assert),
	ATTR_LIST(log_recovery_delay),
	ATTR_LIST(mount_delay),
	NULL,
};

struct kobj_type xfs_dbg_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
	.default_attrs = xfs_dbg_attrs,
};

#endif /* DEBUG */

/* stats */

static inline struct xstats *
to_xstats(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);

	return container_of(kobj, struct xstats, xs_kobj);
}

STATIC ssize_t
stats_show(
	struct kobject	*kobject,
	char		*buf)
{
	struct xstats	*stats = to_xstats(kobject);

	return xfs_stats_format(stats->xs_stats, buf);
}
XFS_SYSFS_ATTR_RO(stats);

STATIC ssize_t
stats_clear_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	int		ret;
	int		val;
	struct xstats	*stats = to_xstats(kobject);

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val != 1)
		return -EINVAL;

	xfs_stats_clearall(stats->xs_stats);
	return count;
}
XFS_SYSFS_ATTR_WO(stats_clear);

static struct attribute *xfs_stats_attrs[] = {
	ATTR_LIST(stats),
	ATTR_LIST(stats_clear),
	NULL,
};

struct kobj_type xfs_stats_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
	.default_attrs = xfs_stats_attrs,
};

/* xlog */

static inline struct xlog *
to_xlog(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);

	return container_of(kobj, struct xlog, l_kobj);
}

STATIC ssize_t
log_head_lsn_show(
	struct kobject	*kobject,
	char		*buf)
{
	int cycle;
	int block;
	struct xlog *log = to_xlog(kobject);

	spin_lock(&log->l_icloglock);
	cycle = log->l_curr_cycle;
	block = log->l_curr_block;
	spin_unlock(&log->l_icloglock);

	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
}
XFS_SYSFS_ATTR_RO(log_head_lsn);

STATIC ssize_t
log_tail_lsn_show(
	struct kobject	*kobject,
	char		*buf)
{
	int cycle;
	int block;
	struct xlog *log = to_xlog(kobject);

	xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
}
XFS_SYSFS_ATTR_RO(log_tail_lsn);

STATIC ssize_t
reserve_grant_head_show(
	struct kobject	*kobject,
	char		*buf)

{
	int cycle;
	int bytes;
	struct xlog *log = to_xlog(kobject);

	xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
}
XFS_SYSFS_ATTR_RO(reserve_grant_head);

STATIC ssize_t
write_grant_head_show(
	struct kobject	*kobject,
	char		*buf)
{
	int cycle;
	int bytes;
	struct xlog *log = to_xlog(kobject);

	xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
}
XFS_SYSFS_ATTR_RO(write_grant_head);

static struct attribute *xfs_log_attrs[] = {
	ATTR_LIST(log_head_lsn),
	ATTR_LIST(log_tail_lsn),
	ATTR_LIST(reserve_grant_head),
	ATTR_LIST(write_grant_head),
	NULL,
};

struct kobj_type xfs_log_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
	.default_attrs = xfs_log_attrs,
};

/*
 * Metadata IO error configuration
 *
 * The sysfs structure here is:
 *	...xfs/<dev>/error/<class>/<errno>/<error_attrs>
 *
 * where <class> allows us to discriminate between data IO and metadata IO,
 * and any other future type of IO (e.g. special inode or directory error
 * handling) we care to support.
 */
static inline struct xfs_error_cfg *
to_error_cfg(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);
	return container_of(kobj, struct xfs_error_cfg, kobj);
}

static inline struct xfs_mount *
err_to_mp(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);
	return container_of(kobj, struct xfs_mount, m_error_kobj);
}

static ssize_t
max_retries_show(
	struct kobject	*kobject,
	char		*buf)
{
	int		retries;
	struct xfs_error_cfg *cfg = to_error_cfg(kobject);

	if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
		retries = -1;
	else
		retries = cfg->max_retries;

	return snprintf(buf, PAGE_SIZE, "%d\n", retries);
}

static ssize_t
max_retries_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val < -1)
		return -EINVAL;

	if (val == -1)
		cfg->max_retries = XFS_ERR_RETRY_FOREVER;
	else
		cfg->max_retries = val;
	return count;
}
XFS_SYSFS_ATTR_RW(max_retries);

static ssize_t
retry_timeout_seconds_show(
	struct kobject	*kobject,
	char		*buf)
{
	int		timeout;
	struct xfs_error_cfg *cfg = to_error_cfg(kobject);

	if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
		timeout = -1;
	else
		timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;

	return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
}

static ssize_t
retry_timeout_seconds_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	/* 1 day timeout maximum, -1 means infinite */
	if (val < -1 || val > 86400)
		return -EINVAL;

	if (val == -1)
		cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
	else {
		cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
		ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
	}
	return count;
}
XFS_SYSFS_ATTR_RW(retry_timeout_seconds);

static ssize_t
fail_at_unmount_show(
	struct kobject	*kobject,
	char		*buf)
{
	struct xfs_mount	*mp = err_to_mp(kobject);

	return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
}

static ssize_t
fail_at_unmount_store(
	struct kobject	*kobject,
	const char	*buf,
	size_t		count)
{
	struct xfs_mount	*mp = err_to_mp(kobject);
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val < 0 || val > 1)
		return -EINVAL;

	mp->m_fail_unmount = val;
	return count;
}
XFS_SYSFS_ATTR_RW(fail_at_unmount);

static struct attribute *xfs_error_attrs[] = {
	ATTR_LIST(max_retries),
	ATTR_LIST(retry_timeout_seconds),
	NULL,
};


static struct kobj_type xfs_error_cfg_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
	.default_attrs = xfs_error_attrs,
};

static struct kobj_type xfs_error_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_sysfs_ops,
};

/*
 * Error initialization tables. These need to be ordered in the same
 * order as the enums used to index the array. All class init tables need to
 * define a "default" behaviour as the first entry, all other entries can be
 * empty.
 */
struct xfs_error_init {
	char		*name;
	int		max_retries;
	int		retry_timeout;	/* in seconds */
};

static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
	{ .name = "default",
	  .max_retries = XFS_ERR_RETRY_FOREVER,
	  .retry_timeout = XFS_ERR_RETRY_FOREVER,
	},
	{ .name = "EIO",
	  .max_retries = XFS_ERR_RETRY_FOREVER,
	  .retry_timeout = XFS_ERR_RETRY_FOREVER,
	},
	{ .name = "ENOSPC",
	  .max_retries = XFS_ERR_RETRY_FOREVER,
	  .retry_timeout = XFS_ERR_RETRY_FOREVER,
	},
	{ .name = "ENODEV",
	  .max_retries = 0,	/* We can't recover from devices disappearing */
	  .retry_timeout = 0,
	},
};

static int
xfs_error_sysfs_init_class(
	struct xfs_mount	*mp,
	int			class,
	const char		*parent_name,
	struct xfs_kobj		*parent_kobj,
	const struct xfs_error_init init[])
{
	struct xfs_error_cfg	*cfg;
	int			error;
	int			i;

	ASSERT(class < XFS_ERR_CLASS_MAX);

	error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
				&mp->m_error_kobj, parent_name);
	if (error)
		return error;

	for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
		cfg = &mp->m_error_cfg[class][i];
		error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
					parent_kobj, init[i].name);
		if (error)
			goto out_error;

		cfg->max_retries = init[i].max_retries;
		if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
			cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
		else
			cfg->retry_timeout = msecs_to_jiffies(
					init[i].retry_timeout * MSEC_PER_SEC);
	}
	return 0;

out_error:
	/* unwind the entries that succeeded */
	for (i--; i >= 0; i--) {
		cfg = &mp->m_error_cfg[class][i];
		xfs_sysfs_del(&cfg->kobj);
	}
	xfs_sysfs_del(parent_kobj);
	return error;
}

int
xfs_error_sysfs_init(
	struct xfs_mount	*mp)
{
	int			error;

	/* .../xfs/<dev>/error/ */
	error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
				&mp->m_kobj, "error");
	if (error)
		return error;

	error = sysfs_create_file(&mp->m_error_kobj.kobject,
				  ATTR_LIST(fail_at_unmount));

	if (error)
		goto out_error;

	/* .../xfs/<dev>/error/metadata/ */
	error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
				"metadata", &mp->m_error_meta_kobj,
				xfs_error_meta_init);
	if (error)
		goto out_error;

	return 0;

out_error:
	xfs_sysfs_del(&mp->m_error_kobj);
	return error;
}

void
xfs_error_sysfs_del(
	struct xfs_mount	*mp)
{
	struct xfs_error_cfg	*cfg;
	int			i, j;

	for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
		for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
			cfg = &mp->m_error_cfg[i][j];

			xfs_sysfs_del(&cfg->kobj);
		}
	}
	xfs_sysfs_del(&mp->m_error_meta_kobj);
	xfs_sysfs_del(&mp->m_error_kobj);
}

struct xfs_error_cfg *
xfs_error_get_cfg(
	struct xfs_mount	*mp,
	int			error_class,
	int			error)
{
	struct xfs_error_cfg	*cfg;

	if (error < 0)
		error = -error;

	switch (error) {
	case EIO:
		cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
		break;
	case ENOSPC:
		cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
		break;
	case ENODEV:
		cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
		break;
	default:
		cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
		break;
	}

	return cfg;
}
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
a31b1d3d BF	2	/*
	3	* Copyright (c) 2014 Red Hat, Inc.
	4	* All Rights Reserved.
a31b1d3d BF	5	*/
	6
	7	#include "xfs.h"
192852be	8	#include "xfs_shared.h"
801cc4e1	9	#include "xfs_format.h"
baff4e44	10	#include "xfs_log_format.h"
801cc4e1	11	#include "xfs_trans_resv.h"
192852be	12	#include "xfs_sysfs.h"
baff4e44 BF	13	#include "xfs_log.h"
baff4e44 BF	14	#include "xfs_log_priv.h"
bb230c12	15	#include "xfs_stats.h"
801cc4e1	16	#include "xfs_mount.h"
a31b1d3d BF	17
	18	struct xfs_sysfs_attr {
	19	struct attribute attr;
a27c2640 BD	20	ssize_t (show)(struct kobject kobject, char *buf);
	21	ssize_t (store)(struct kobject kobject, const char *buf,
	22	size_t count);
a31b1d3d BF	23	};
	24
	25	static inline struct xfs_sysfs_attr *
	26	to_attr(struct attribute *attr)
	27	{
	28	return container_of(attr, struct xfs_sysfs_attr, attr);
	29	}
	30
	31	#define XFS_SYSFS_ATTR_RW(name) \
	32	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
	33	#define XFS_SYSFS_ATTR_RO(name) \
	34	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
bb230c12 BD	35	#define XFS_SYSFS_ATTR_WO(name) \
bb230c12 BD	36	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
a31b1d3d BF	37
	38	#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
	39
a27c2640 BD	40	STATIC ssize_t
	41	xfs_sysfs_object_show(
	42	struct kobject *kobject,
	43	struct attribute *attr,
	44	char *buf)
	45	{
	46	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
	47
	48	return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
	49	}
	50
	51	STATIC ssize_t
	52	xfs_sysfs_object_store(
	53	struct kobject *kobject,
	54	struct attribute *attr,
	55	const char *buf,
	56	size_t count)
	57	{
	58	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
	59
	60	return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
	61	}
	62
	63	static const struct sysfs_ops xfs_sysfs_ops = {
	64	.show = xfs_sysfs_object_show,
	65	.store = xfs_sysfs_object_store,
	66	};
	67
801cc4e1 BF	68	/*
	69	* xfs_mount kobject. The mp kobject also serves as the per-mount parent object
	70	* that is identified by the fsname under sysfs.
	71	*/
	72
	73	static inline struct xfs_mount *
	74	to_mp(struct kobject *kobject)
	75	{
	76	struct xfs_kobj *kobj = to_kobj(kobject);
	77
	78	return container_of(kobj, struct xfs_mount, m_kobj);
	79	}
	80
801cc4e1	81	static struct attribute *xfs_mp_attrs[] = {
801cc4e1 BF	82	NULL,
	83	};
	84
	85	struct kobj_type xfs_mp_ktype = {
	86	.release = xfs_sysfs_release,
	87	.sysfs_ops = &xfs_sysfs_ops,
	88	.default_attrs = xfs_mp_attrs,
	89	};
	90
65b65735 BF	91	#ifdef DEBUG
	92	/* debug */
	93
ccdab3d6 BF	94	STATIC ssize_t
	95	bug_on_assert_store(
	96	struct kobject *kobject,
	97	const char *buf,
	98	size_t count)
	99	{
	100	int ret;
	101	int val;
	102
	103	ret = kstrtoint(buf, 0, &val);
	104	if (ret)
	105	return ret;
	106
	107	if (val == 1)
	108	xfs_globals.bug_on_assert = true;
	109	else if (val == 0)
	110	xfs_globals.bug_on_assert = false;
	111	else
	112	return -EINVAL;
	113
	114	return count;
	115	}
	116
	117	STATIC ssize_t
	118	bug_on_assert_show(
	119	struct kobject *kobject,
	120	char *buf)
	121	{
	122	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
	123	}
	124	XFS_SYSFS_ATTR_RW(bug_on_assert);
	125
2e227178 BF	126	STATIC ssize_t
2e227178 BF	127	log_recovery_delay_store(
a27c2640	128	struct kobject *kobject,
2e227178	129	const char *buf,
a27c2640	130	size_t count)
2e227178 BF	131	{
	132	int ret;
	133	int val;
	134
	135	ret = kstrtoint(buf, 0, &val);
	136	if (ret)
	137	return ret;
	138
	139	if (val < 0 \|\| val > 60)
	140	return -EINVAL;
	141
	142	xfs_globals.log_recovery_delay = val;
	143
	144	return count;
	145	}
	146
	147	STATIC ssize_t
	148	log_recovery_delay_show(
a27c2640 BD	149	struct kobject *kobject,
a27c2640 BD	150	char *buf)
2e227178 BF	151	{
	152	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
	153	}
	154	XFS_SYSFS_ATTR_RW(log_recovery_delay);
	155
dae5cd81 DC	156	STATIC ssize_t
	157	mount_delay_store(
	158	struct kobject *kobject,
	159	const char *buf,
	160	size_t count)
	161	{
	162	int ret;
	163	int val;
	164
	165	ret = kstrtoint(buf, 0, &val);
	166	if (ret)
	167	return ret;
	168
	169	if (val < 0 \|\| val > 60)
	170	return -EINVAL;
	171
	172	xfs_globals.mount_delay = val;
	173
	174	return count;
	175	}
	176
	177	STATIC ssize_t
	178	mount_delay_show(
	179	struct kobject *kobject,
	180	char *buf)
	181	{
	182	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
	183	}
	184	XFS_SYSFS_ATTR_RW(mount_delay);
	185
65b65735	186	static struct attribute *xfs_dbg_attrs[] = {
ccdab3d6	187	ATTR_LIST(bug_on_assert),
2e227178	188	ATTR_LIST(log_recovery_delay),
dae5cd81	189	ATTR_LIST(mount_delay),
65b65735 BF	190	NULL,
	191	};
	192
65b65735 BF	193	struct kobj_type xfs_dbg_ktype = {
65b65735 BF	194	.release = xfs_sysfs_release,
a27c2640	195	.sysfs_ops = &xfs_sysfs_ops,
65b65735 BF	196	.default_attrs = xfs_dbg_attrs,
	197	};
	198
	199	#endif /* DEBUG */
	200
bb230c12 BD	201	/* stats */
bb230c12 BD	202
80529c45 BD	203	static inline struct xstats *
	204	to_xstats(struct kobject *kobject)
	205	{
	206	struct xfs_kobj *kobj = to_kobj(kobject);
	207
	208	return container_of(kobj, struct xstats, xs_kobj);
	209	}
	210
bb230c12 BD	211	STATIC ssize_t
bb230c12 BD	212	stats_show(
a27c2640 BD	213	struct kobject *kobject,
a27c2640 BD	214	char *buf)
bb230c12	215	{
80529c45 BD	216	struct xstats *stats = to_xstats(kobject);
	217
	218	return xfs_stats_format(stats->xs_stats, buf);
bb230c12 BD	219	}
	220	XFS_SYSFS_ATTR_RO(stats);
	221
	222	STATIC ssize_t
	223	stats_clear_store(
a27c2640	224	struct kobject *kobject,
bb230c12	225	const char *buf,
a27c2640	226	size_t count)
bb230c12 BD	227	{
	228	int ret;
	229	int val;
80529c45	230	struct xstats *stats = to_xstats(kobject);
bb230c12 BD	231
	232	ret = kstrtoint(buf, 0, &val);
	233	if (ret)
	234	return ret;
	235
	236	if (val != 1)
	237	return -EINVAL;
80529c45 BD	238
80529c45 BD	239	xfs_stats_clearall(stats->xs_stats);
bb230c12 BD	240	return count;
	241	}
	242	XFS_SYSFS_ATTR_WO(stats_clear);
	243
	244	static struct attribute *xfs_stats_attrs[] = {
	245	ATTR_LIST(stats),
	246	ATTR_LIST(stats_clear),
	247	NULL,
	248	};
	249
bb230c12 BD	250	struct kobj_type xfs_stats_ktype = {
bb230c12 BD	251	.release = xfs_sysfs_release,
a27c2640	252	.sysfs_ops = &xfs_sysfs_ops,
bb230c12 BD	253	.default_attrs = xfs_stats_attrs,
	254	};
	255
baff4e44 BF	256	/* xlog */
baff4e44 BF	257
a27c2640 BD	258	static inline struct xlog *
	259	to_xlog(struct kobject *kobject)
	260	{
	261	struct xfs_kobj *kobj = to_kobj(kobject);
	262
	263	return container_of(kobj, struct xlog, l_kobj);
	264	}
	265
80d6d698 BF	266	STATIC ssize_t
80d6d698 BF	267	log_head_lsn_show(
a27c2640 BD	268	struct kobject *kobject,
a27c2640 BD	269	char *buf)
80d6d698	270	{
80d6d698 BF	271	int cycle;
80d6d698 BF	272	int block;
a27c2640	273	struct xlog *log = to_xlog(kobject);
80d6d698 BF	274
	275	spin_lock(&log->l_icloglock);
	276	cycle = log->l_curr_cycle;
	277	block = log->l_curr_block;
	278	spin_unlock(&log->l_icloglock);
	279
	280	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
	281	}
	282	XFS_SYSFS_ATTR_RO(log_head_lsn);
	283
	284	STATIC ssize_t
	285	log_tail_lsn_show(
a27c2640 BD	286	struct kobject *kobject,
a27c2640 BD	287	char *buf)
80d6d698	288	{
80d6d698 BF	289	int cycle;
80d6d698 BF	290	int block;
a27c2640	291	struct xlog *log = to_xlog(kobject);
80d6d698 BF	292
	293	xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
	294	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
	295	}
	296	XFS_SYSFS_ATTR_RO(log_tail_lsn);
	297
	298	STATIC ssize_t
	299	reserve_grant_head_show(
a27c2640 BD	300	struct kobject *kobject,
	301	char *buf)
	302
80d6d698	303	{
80d6d698 BF	304	int cycle;
80d6d698 BF	305	int bytes;
a27c2640	306	struct xlog *log = to_xlog(kobject);
80d6d698 BF	307
	308	xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
	309	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
	310	}
	311	XFS_SYSFS_ATTR_RO(reserve_grant_head);
	312
	313	STATIC ssize_t
	314	write_grant_head_show(
a27c2640 BD	315	struct kobject *kobject,
a27c2640 BD	316	char *buf)
80d6d698	317	{
80d6d698 BF	318	int cycle;
80d6d698 BF	319	int bytes;
a27c2640	320	struct xlog *log = to_xlog(kobject);
80d6d698 BF	321
	322	xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
	323	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
	324	}
	325	XFS_SYSFS_ATTR_RO(write_grant_head);
	326
baff4e44	327	static struct attribute *xfs_log_attrs[] = {
80d6d698 BF	328	ATTR_LIST(log_head_lsn),
	329	ATTR_LIST(log_tail_lsn),
	330	ATTR_LIST(reserve_grant_head),
	331	ATTR_LIST(write_grant_head),
baff4e44 BF	332	NULL,
	333	};
	334
baff4e44 BF	335	struct kobj_type xfs_log_ktype = {
baff4e44 BF	336	.release = xfs_sysfs_release,
a27c2640	337	.sysfs_ops = &xfs_sysfs_ops,
baff4e44 BF	338	.default_attrs = xfs_log_attrs,
baff4e44 BF	339	};
192852be CM	340
	341	/*
	342	* Metadata IO error configuration
	343	*
	344	* The sysfs structure here is:
	345	* ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
	346	*
	347	* where <class> allows us to discriminate between data IO and metadata IO,
	348	* and any other future type of IO (e.g. special inode or directory error
	349	* handling) we care to support.
	350	*/
192852be CM	351	static inline struct xfs_error_cfg *
	352	to_error_cfg(struct kobject *kobject)
	353	{
	354	struct xfs_kobj *kobj = to_kobj(kobject);
	355	return container_of(kobj, struct xfs_error_cfg, kobj);
	356	}
	357
e6b3bb78 CM	358	static inline struct xfs_mount *
	359	err_to_mp(struct kobject *kobject)
	360	{
	361	struct xfs_kobj *kobj = to_kobj(kobject);
	362	return container_of(kobj, struct xfs_mount, m_error_kobj);
	363	}
	364
a5ea70d2 CM	365	static ssize_t
	366	max_retries_show(
	367	struct kobject *kobject,
	368	char *buf)
	369	{
77169812	370	int retries;
a5ea70d2 CM	371	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
a5ea70d2 CM	372
ff97f239	373	if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
77169812 ES	374	retries = -1;
	375	else
	376	retries = cfg->max_retries;
	377
	378	return snprintf(buf, PAGE_SIZE, "%d\n", retries);
a5ea70d2 CM	379	}
	380
	381	static ssize_t
	382	max_retries_store(
	383	struct kobject *kobject,
	384	const char *buf,
	385	size_t count)
	386	{
	387	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
	388	int ret;
	389	int val;
	390
	391	ret = kstrtoint(buf, 0, &val);
	392	if (ret)
	393	return ret;
	394
	395	if (val < -1)
	396	return -EINVAL;
	397
77169812	398	if (val == -1)
ff97f239	399	cfg->max_retries = XFS_ERR_RETRY_FOREVER;
77169812 ES	400	else
77169812 ES	401	cfg->max_retries = val;
a5ea70d2 CM	402	return count;
	403	}
	404	XFS_SYSFS_ATTR_RW(max_retries);
	405
	406	static ssize_t
	407	retry_timeout_seconds_show(
	408	struct kobject *kobject,
	409	char *buf)
	410	{
77169812	411	int timeout;
a5ea70d2 CM	412	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
a5ea70d2 CM	413
77169812 ES	414	if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
	415	timeout = -1;
	416	else
	417	timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
	418
	419	return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
a5ea70d2 CM	420	}
	421
	422	static ssize_t
	423	retry_timeout_seconds_store(
	424	struct kobject *kobject,
	425	const char *buf,
	426	size_t count)
	427	{
	428	struct xfs_error_cfg *cfg = to_error_cfg(kobject);
	429	int ret;
	430	int val;
	431
	432	ret = kstrtoint(buf, 0, &val);
	433	if (ret)
	434	return ret;
	435
77169812 ES	436	/* 1 day timeout maximum, -1 means infinite */
77169812 ES	437	if (val < -1 \|\| val > 86400)
a5ea70d2 CM	438	return -EINVAL;
a5ea70d2 CM	439
77169812 ES	440	if (val == -1)
	441	cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
	442	else {
	443	cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
	444	ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
	445	}
a5ea70d2 CM	446	return count;
	447	}
	448	XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
	449
e6b3bb78 CM	450	static ssize_t
	451	fail_at_unmount_show(
	452	struct kobject *kobject,
	453	char *buf)
	454	{
	455	struct xfs_mount *mp = err_to_mp(kobject);
	456
	457	return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
	458	}
	459
	460	static ssize_t
	461	fail_at_unmount_store(
	462	struct kobject *kobject,
	463	const char *buf,
	464	size_t count)
	465	{
	466	struct xfs_mount *mp = err_to_mp(kobject);
	467	int ret;
	468	int val;
	469
	470	ret = kstrtoint(buf, 0, &val);
	471	if (ret)
	472	return ret;
	473
	474	if (val < 0 \|\| val > 1)
	475	return -EINVAL;
	476
	477	mp->m_fail_unmount = val;
	478	return count;
	479	}
	480	XFS_SYSFS_ATTR_RW(fail_at_unmount);
	481
a5ea70d2 CM	482	static struct attribute *xfs_error_attrs[] = {
	483	ATTR_LIST(max_retries),
	484	ATTR_LIST(retry_timeout_seconds),
	485	NULL,
	486	};
	487
	488
f1b8243c	489	static struct kobj_type xfs_error_cfg_ktype = {
192852be CM	490	.release = xfs_sysfs_release,
	491	.sysfs_ops = &xfs_sysfs_ops,
	492	.default_attrs = xfs_error_attrs,
	493	};
	494
f1b8243c	495	static struct kobj_type xfs_error_ktype = {
192852be	496	.release = xfs_sysfs_release,
e6b3bb78	497	.sysfs_ops = &xfs_sysfs_ops,
192852be CM	498	};
192852be CM	499
ef6a50fb CM	500	/*
	501	* Error initialization tables. These need to be ordered in the same
	502	* order as the enums used to index the array. All class init tables need to
	503	* define a "default" behaviour as the first entry, all other entries can be
	504	* empty.
	505	*/
	506	struct xfs_error_init {
	507	char *name;
	508	int max_retries;
a5ea70d2	509	int retry_timeout; /* in seconds */
ef6a50fb CM	510	};
	511
	512	static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
	513	{ .name = "default",
e0a431b3	514	.max_retries = XFS_ERR_RETRY_FOREVER,
77169812	515	.retry_timeout = XFS_ERR_RETRY_FOREVER,
ef6a50fb	516	},
e0a431b3 CM	517	{ .name = "EIO",
e0a431b3 CM	518	.max_retries = XFS_ERR_RETRY_FOREVER,
77169812	519	.retry_timeout = XFS_ERR_RETRY_FOREVER,
e0a431b3 CM	520	},
	521	{ .name = "ENOSPC",
	522	.max_retries = XFS_ERR_RETRY_FOREVER,
77169812	523	.retry_timeout = XFS_ERR_RETRY_FOREVER,
e0a431b3 CM	524	},
e0a431b3 CM	525	{ .name = "ENODEV",
77169812 ES	526	.max_retries = 0, /* We can't recover from devices disappearing */
77169812 ES	527	.retry_timeout = 0,
e0a431b3	528	},
ef6a50fb CM	529	};
	530
	531	static int
	532	xfs_error_sysfs_init_class(
	533	struct xfs_mount *mp,
	534	int class,
	535	const char *parent_name,
	536	struct xfs_kobj *parent_kobj,
	537	const struct xfs_error_init init[])
	538	{
	539	struct xfs_error_cfg *cfg;
	540	int error;
	541	int i;
	542
	543	ASSERT(class < XFS_ERR_CLASS_MAX);
	544
	545	error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
	546	&mp->m_error_kobj, parent_name);
	547	if (error)
	548	return error;
	549
	550	for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
	551	cfg = &mp->m_error_cfg[class][i];
	552	error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
	553	parent_kobj, init[i].name);
	554	if (error)
	555	goto out_error;
	556
	557	cfg->max_retries = init[i].max_retries;
77169812 ES	558	if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
	559	cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
	560	else
	561	cfg->retry_timeout = msecs_to_jiffies(
a5ea70d2	562	init[i].retry_timeout * MSEC_PER_SEC);
ef6a50fb CM	563	}
	564	return 0;
	565
	566	out_error:
	567	/* unwind the entries that succeeded */
	568	for (i--; i >= 0; i--) {
	569	cfg = &mp->m_error_cfg[class][i];
	570	xfs_sysfs_del(&cfg->kobj);
	571	}
	572	xfs_sysfs_del(parent_kobj);
	573	return error;
	574	}
	575
192852be CM	576	int
	577	xfs_error_sysfs_init(
	578	struct xfs_mount *mp)
	579	{
	580	int error;
	581
	582	/* .../xfs/<dev>/error/ */
	583	error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
	584	&mp->m_kobj, "error");
ffd40ef6 CM	585	if (error)
	586	return error;
	587
e6b3bb78 CM	588	error = sysfs_create_file(&mp->m_error_kobj.kobject,
	589	ATTR_LIST(fail_at_unmount));
	590
	591	if (error)
	592	goto out_error;
	593
ffd40ef6	594	/* .../xfs/<dev>/error/metadata/ */
ef6a50fb CM	595	error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
	596	"metadata", &mp->m_error_meta_kobj,
	597	xfs_error_meta_init);
ffd40ef6 CM	598	if (error)
	599	goto out_error;
	600
ffd40ef6 CM	601	return 0;
ffd40ef6 CM	602
ffd40ef6 CM	603	out_error:
ffd40ef6 CM	604	xfs_sysfs_del(&mp->m_error_kobj);
192852be CM	605	return error;
	606	}
	607
	608	void
	609	xfs_error_sysfs_del(
	610	struct xfs_mount *mp)
	611	{
ffd40ef6 CM	612	struct xfs_error_cfg *cfg;
	613	int i, j;
	614
	615	for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
	616	for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
	617	cfg = &mp->m_error_cfg[i][j];
	618
	619	xfs_sysfs_del(&cfg->kobj);
	620	}
	621	}
	622	xfs_sysfs_del(&mp->m_error_meta_kobj);
192852be CM	623	xfs_sysfs_del(&mp->m_error_kobj);
192852be CM	624	}
df309390 CM	625
	626	struct xfs_error_cfg *
	627	xfs_error_get_cfg(
	628	struct xfs_mount *mp,
	629	int error_class,
	630	int error)
	631	{
	632	struct xfs_error_cfg *cfg;
	633
e97f6c54 ES	634	if (error < 0)
	635	error = -error;
	636
df309390	637	switch (error) {
e0a431b3 CM	638	case EIO:
	639	cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
	640	break;
	641	case ENOSPC:
	642	cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
	643	break;
	644	case ENODEV:
	645	cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
	646	break;
df309390 CM	647	default:
	648	cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
	649	break;
	650	}
	651
	652	return cfg;
	653	}