[linux-block.git] / fs / xfs / xfs_error.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_fs.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_errortag.h"
#include "xfs_error.h"
#include "xfs_sysfs.h"
#include "xfs_inode.h"

#ifdef DEBUG

static unsigned int xfs_errortag_random_default[] = {
	XFS_RANDOM_DEFAULT,
	XFS_RANDOM_IFLUSH_1,
	XFS_RANDOM_IFLUSH_2,
	XFS_RANDOM_IFLUSH_3,
	XFS_RANDOM_IFLUSH_4,
	XFS_RANDOM_IFLUSH_5,
	XFS_RANDOM_IFLUSH_6,
	XFS_RANDOM_DA_READ_BUF,
	XFS_RANDOM_BTREE_CHECK_LBLOCK,
	XFS_RANDOM_BTREE_CHECK_SBLOCK,
	XFS_RANDOM_ALLOC_READ_AGF,
	XFS_RANDOM_IALLOC_READ_AGI,
	XFS_RANDOM_ITOBP_INOTOBP,
	XFS_RANDOM_IUNLINK,
	XFS_RANDOM_IUNLINK_REMOVE,
	XFS_RANDOM_DIR_INO_VALIDATE,
	XFS_RANDOM_BULKSTAT_READ_CHUNK,
	XFS_RANDOM_IODONE_IOERR,
	XFS_RANDOM_STRATREAD_IOERR,
	XFS_RANDOM_STRATCMPL_IOERR,
	XFS_RANDOM_DIOWRITE_IOERR,
	XFS_RANDOM_BMAPIFORMAT,
	XFS_RANDOM_FREE_EXTENT,
	XFS_RANDOM_RMAP_FINISH_ONE,
	XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
	XFS_RANDOM_REFCOUNT_FINISH_ONE,
	XFS_RANDOM_BMAP_FINISH_ONE,
	XFS_RANDOM_AG_RESV_CRITICAL,
	XFS_RANDOM_DROP_WRITES,
	XFS_RANDOM_LOG_BAD_CRC,
	XFS_RANDOM_LOG_ITEM_PIN,
	XFS_RANDOM_BUF_LRU_REF,
	XFS_RANDOM_FORCE_SCRUB_REPAIR,
	XFS_RANDOM_FORCE_SUMMARY_RECALC,
	XFS_RANDOM_IUNLINK_FALLBACK,
	XFS_RANDOM_BUF_IOERROR,
	XFS_RANDOM_REDUCE_MAX_IEXTENTS,
	XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT,
	XFS_RANDOM_AG_RESV_FAIL,
	XFS_RANDOM_LARP,
	XFS_RANDOM_DA_LEAF_SPLIT,
	XFS_RANDOM_ATTR_LEAF_TO_NODE,
};

struct xfs_errortag_attr {
	struct attribute	attr;
	unsigned int		tag;
};

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

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_errortag_kobj);
}

STATIC ssize_t
xfs_errortag_attr_store(
	struct kobject		*kobject,
	struct attribute	*attr,
	const char		*buf,
	size_t			count)
{
	struct xfs_mount	*mp = to_mp(kobject);
	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
	int			ret;
	unsigned int		val;

	if (strcmp(buf, "default") == 0) {
		val = xfs_errortag_random_default[xfs_attr->tag];
	} else {
		ret = kstrtouint(buf, 0, &val);
		if (ret)
			return ret;
	}

	ret = xfs_errortag_set(mp, xfs_attr->tag, val);
	if (ret)
		return ret;
	return count;
}

STATIC ssize_t
xfs_errortag_attr_show(
	struct kobject		*kobject,
	struct attribute	*attr,
	char			*buf)
{
	struct xfs_mount	*mp = to_mp(kobject);
	struct xfs_errortag_attr *xfs_attr = to_attr(attr);

	return snprintf(buf, PAGE_SIZE, "%u\n",
			xfs_errortag_get(mp, xfs_attr->tag));
}

static const struct sysfs_ops xfs_errortag_sysfs_ops = {
	.show = xfs_errortag_attr_show,
	.store = xfs_errortag_attr_store,
};

#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
static struct xfs_errortag_attr xfs_errortag_attr_##_name = {		\
	.attr = {.name = __stringify(_name),				\
		 .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) },	\
	.tag	= (_tag),						\
}

#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr

XFS_ERRORTAG_ATTR_RW(noerror,		XFS_ERRTAG_NOERROR);
XFS_ERRORTAG_ATTR_RW(iflush1,		XFS_ERRTAG_IFLUSH_1);
XFS_ERRORTAG_ATTR_RW(iflush2,		XFS_ERRTAG_IFLUSH_2);
XFS_ERRORTAG_ATTR_RW(iflush3,		XFS_ERRTAG_IFLUSH_3);
XFS_ERRORTAG_ATTR_RW(iflush4,		XFS_ERRTAG_IFLUSH_4);
XFS_ERRORTAG_ATTR_RW(iflush5,		XFS_ERRTAG_IFLUSH_5);
XFS_ERRORTAG_ATTR_RW(iflush6,		XFS_ERRTAG_IFLUSH_6);
XFS_ERRORTAG_ATTR_RW(dareadbuf,		XFS_ERRTAG_DA_READ_BUF);
XFS_ERRORTAG_ATTR_RW(btree_chk_lblk,	XFS_ERRTAG_BTREE_CHECK_LBLOCK);
XFS_ERRORTAG_ATTR_RW(btree_chk_sblk,	XFS_ERRTAG_BTREE_CHECK_SBLOCK);
XFS_ERRORTAG_ATTR_RW(readagf,		XFS_ERRTAG_ALLOC_READ_AGF);
XFS_ERRORTAG_ATTR_RW(readagi,		XFS_ERRTAG_IALLOC_READ_AGI);
XFS_ERRORTAG_ATTR_RW(itobp,		XFS_ERRTAG_ITOBP_INOTOBP);
XFS_ERRORTAG_ATTR_RW(iunlink,		XFS_ERRTAG_IUNLINK);
XFS_ERRORTAG_ATTR_RW(iunlinkrm,		XFS_ERRTAG_IUNLINK_REMOVE);
XFS_ERRORTAG_ATTR_RW(dirinovalid,	XFS_ERRTAG_DIR_INO_VALIDATE);
XFS_ERRORTAG_ATTR_RW(bulkstat,		XFS_ERRTAG_BULKSTAT_READ_CHUNK);
XFS_ERRORTAG_ATTR_RW(logiodone,		XFS_ERRTAG_IODONE_IOERR);
XFS_ERRORTAG_ATTR_RW(stratread,		XFS_ERRTAG_STRATREAD_IOERR);
XFS_ERRORTAG_ATTR_RW(stratcmpl,		XFS_ERRTAG_STRATCMPL_IOERR);
XFS_ERRORTAG_ATTR_RW(diowrite,		XFS_ERRTAG_DIOWRITE_IOERR);
XFS_ERRORTAG_ATTR_RW(bmapifmt,		XFS_ERRTAG_BMAPIFORMAT);
XFS_ERRORTAG_ATTR_RW(free_extent,	XFS_ERRTAG_FREE_EXTENT);
XFS_ERRORTAG_ATTR_RW(rmap_finish_one,	XFS_ERRTAG_RMAP_FINISH_ONE);
XFS_ERRORTAG_ATTR_RW(refcount_continue_update,	XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
XFS_ERRORTAG_ATTR_RW(refcount_finish_one,	XFS_ERRTAG_REFCOUNT_FINISH_ONE);
XFS_ERRORTAG_ATTR_RW(bmap_finish_one,	XFS_ERRTAG_BMAP_FINISH_ONE);
XFS_ERRORTAG_ATTR_RW(ag_resv_critical,	XFS_ERRTAG_AG_RESV_CRITICAL);
XFS_ERRORTAG_ATTR_RW(drop_writes,	XFS_ERRTAG_DROP_WRITES);
XFS_ERRORTAG_ATTR_RW(log_bad_crc,	XFS_ERRTAG_LOG_BAD_CRC);
XFS_ERRORTAG_ATTR_RW(log_item_pin,	XFS_ERRTAG_LOG_ITEM_PIN);
XFS_ERRORTAG_ATTR_RW(buf_lru_ref,	XFS_ERRTAG_BUF_LRU_REF);
XFS_ERRORTAG_ATTR_RW(force_repair,	XFS_ERRTAG_FORCE_SCRUB_REPAIR);
XFS_ERRORTAG_ATTR_RW(bad_summary,	XFS_ERRTAG_FORCE_SUMMARY_RECALC);
XFS_ERRORTAG_ATTR_RW(iunlink_fallback,	XFS_ERRTAG_IUNLINK_FALLBACK);
XFS_ERRORTAG_ATTR_RW(buf_ioerror,	XFS_ERRTAG_BUF_IOERROR);
XFS_ERRORTAG_ATTR_RW(reduce_max_iextents,	XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent,	XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
XFS_ERRORTAG_ATTR_RW(larp,		XFS_ERRTAG_LARP);
XFS_ERRORTAG_ATTR_RW(da_leaf_split,	XFS_ERRTAG_DA_LEAF_SPLIT);
XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node,	XFS_ERRTAG_ATTR_LEAF_TO_NODE);

static struct attribute *xfs_errortag_attrs[] = {
	XFS_ERRORTAG_ATTR_LIST(noerror),
	XFS_ERRORTAG_ATTR_LIST(iflush1),
	XFS_ERRORTAG_ATTR_LIST(iflush2),
	XFS_ERRORTAG_ATTR_LIST(iflush3),
	XFS_ERRORTAG_ATTR_LIST(iflush4),
	XFS_ERRORTAG_ATTR_LIST(iflush5),
	XFS_ERRORTAG_ATTR_LIST(iflush6),
	XFS_ERRORTAG_ATTR_LIST(dareadbuf),
	XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
	XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
	XFS_ERRORTAG_ATTR_LIST(readagf),
	XFS_ERRORTAG_ATTR_LIST(readagi),
	XFS_ERRORTAG_ATTR_LIST(itobp),
	XFS_ERRORTAG_ATTR_LIST(iunlink),
	XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
	XFS_ERRORTAG_ATTR_LIST(dirinovalid),
	XFS_ERRORTAG_ATTR_LIST(bulkstat),
	XFS_ERRORTAG_ATTR_LIST(logiodone),
	XFS_ERRORTAG_ATTR_LIST(stratread),
	XFS_ERRORTAG_ATTR_LIST(stratcmpl),
	XFS_ERRORTAG_ATTR_LIST(diowrite),
	XFS_ERRORTAG_ATTR_LIST(bmapifmt),
	XFS_ERRORTAG_ATTR_LIST(free_extent),
	XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
	XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
	XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
	XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
	XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
	XFS_ERRORTAG_ATTR_LIST(drop_writes),
	XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
	XFS_ERRORTAG_ATTR_LIST(log_item_pin),
	XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
	XFS_ERRORTAG_ATTR_LIST(force_repair),
	XFS_ERRORTAG_ATTR_LIST(bad_summary),
	XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
	XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
	XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
	XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
	XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
	XFS_ERRORTAG_ATTR_LIST(larp),
	XFS_ERRORTAG_ATTR_LIST(da_leaf_split),
	XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node),
	NULL,
};
ATTRIBUTE_GROUPS(xfs_errortag);

static struct kobj_type xfs_errortag_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_errortag_sysfs_ops,
	.default_groups = xfs_errortag_groups,
};

int
xfs_errortag_init(
	struct xfs_mount	*mp)
{
	mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
			KM_MAYFAIL);
	if (!mp->m_errortag)
		return -ENOMEM;

	return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
			       &mp->m_kobj, "errortag");
}

void
xfs_errortag_del(
	struct xfs_mount	*mp)
{
	xfs_sysfs_del(&mp->m_errortag_kobj);
	kmem_free(mp->m_errortag);
}

bool
xfs_errortag_test(
	struct xfs_mount	*mp,
	const char		*expression,
	const char		*file,
	int			line,
	unsigned int		error_tag)
{
	unsigned int		randfactor;

	/*
	 * To be able to use error injection anywhere, we need to ensure error
	 * injection mechanism is already initialized.
	 *
	 * Code paths like I/O completion can be called before the
	 * initialization is complete, but be able to inject errors in such
	 * places is still useful.
	 */
	if (!mp->m_errortag)
		return false;

	ASSERT(error_tag < XFS_ERRTAG_MAX);
	randfactor = mp->m_errortag[error_tag];
	if (!randfactor || prandom_u32_max(randfactor))
		return false;

	xfs_warn_ratelimited(mp,
"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
			expression, file, line, mp->m_super->s_id);
	return true;
}

int
xfs_errortag_get(
	struct xfs_mount	*mp,
	unsigned int		error_tag)
{
	if (error_tag >= XFS_ERRTAG_MAX)
		return -EINVAL;

	return mp->m_errortag[error_tag];
}

int
xfs_errortag_set(
	struct xfs_mount	*mp,
	unsigned int		error_tag,
	unsigned int		tag_value)
{
	if (error_tag >= XFS_ERRTAG_MAX)
		return -EINVAL;

	mp->m_errortag[error_tag] = tag_value;
	return 0;
}

int
xfs_errortag_add(
	struct xfs_mount	*mp,
	unsigned int		error_tag)
{
	BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX);

	if (error_tag >= XFS_ERRTAG_MAX)
		return -EINVAL;

	return xfs_errortag_set(mp, error_tag,
			xfs_errortag_random_default[error_tag]);
}

int
xfs_errortag_clearall(
	struct xfs_mount	*mp)
{
	memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
	return 0;
}
#endif /* DEBUG */

void
xfs_error_report(
	const char		*tag,
	int			level,
	struct xfs_mount	*mp,
	const char		*filename,
	int			linenum,
	xfs_failaddr_t		failaddr)
{
	if (level <= xfs_error_level) {
		xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
		"Internal error %s at line %d of file %s.  Caller %pS",
			    tag, linenum, filename, failaddr);

		xfs_stack_trace();
	}
}

void
xfs_corruption_error(
	const char		*tag,
	int			level,
	struct xfs_mount	*mp,
	const void		*buf,
	size_t			bufsize,
	const char		*filename,
	int			linenum,
	xfs_failaddr_t		failaddr)
{
	if (buf && level <= xfs_error_level)
		xfs_hex_dump(buf, bufsize);
	xfs_error_report(tag, level, mp, filename, linenum, failaddr);
	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
}

/*
 * Complain about the kinds of metadata corruption that we can't detect from a
 * verifier, such as incorrect inter-block relationship data.  Does not set
 * bp->b_error.
 *
 * Call xfs_buf_mark_corrupt, not this function.
 */
void
xfs_buf_corruption_error(
	struct xfs_buf		*bp,
	xfs_failaddr_t		fa)
{
	struct xfs_mount	*mp = bp->b_mount;

	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
		  "Metadata corruption detected at %pS, %s block 0x%llx",
		  fa, bp->b_ops->name, xfs_buf_daddr(bp));

	xfs_alert(mp, "Unmount and run xfs_repair");

	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
		xfs_stack_trace();
}

/*
 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
 * values, and omit the stack trace unless the error level is tuned high.
 */
void
xfs_buf_verifier_error(
	struct xfs_buf		*bp,
	int			error,
	const char		*name,
	const void		*buf,
	size_t			bufsz,
	xfs_failaddr_t		failaddr)
{
	struct xfs_mount	*mp = bp->b_mount;
	xfs_failaddr_t		fa;
	int			sz;

	fa = failaddr ? failaddr : __return_address;
	__xfs_buf_ioerror(bp, error, fa);

	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
		  "Metadata %s detected at %pS, %s block 0x%llx %s",
		  bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
		  fa, bp->b_ops->name, xfs_buf_daddr(bp), name);

	xfs_alert(mp, "Unmount and run xfs_repair");

	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
		sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
		xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
				sz);
		xfs_hex_dump(buf, sz);
	}

	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
		xfs_stack_trace();
}

/*
 * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
 * values, and omit the stack trace unless the error level is tuned high.
 */
void
xfs_verifier_error(
	struct xfs_buf		*bp,
	int			error,
	xfs_failaddr_t		failaddr)
{
	return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
			XFS_CORRUPTION_DUMP_LEN, failaddr);
}

/*
 * Warnings for inode corruption problems.  Don't bother with the stack
 * trace unless the error level is turned up high.
 */
void
xfs_inode_verifier_error(
	struct xfs_inode	*ip,
	int			error,
	const char		*name,
	const void		*buf,
	size_t			bufsz,
	xfs_failaddr_t		failaddr)
{
	struct xfs_mount	*mp = ip->i_mount;
	xfs_failaddr_t		fa;
	int			sz;

	fa = failaddr ? failaddr : __return_address;

	xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
		  error == -EFSBADCRC ? "CRC error" : "corruption",
		  fa, ip->i_ino, name);

	xfs_alert(mp, "Unmount and run xfs_repair");

	if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) {
		sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
		xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
				sz);
		xfs_hex_dump(buf, sz);
	}

	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
		xfs_stack_trace();
}
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
7b718769 NS	3	* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
7b718769 NS	4	* All Rights Reserved.
1da177e4	5	*/
1da177e4	6	#include "xfs.h"
5467b34b	7	#include "xfs_shared.h"
a4fbe6ab	8	#include "xfs_format.h"
a844f451	9	#include "xfs_fs.h"
239880ef DC	10	#include "xfs_log_format.h"
239880ef DC	11	#include "xfs_trans_resv.h"
1da177e4	12	#include "xfs_mount.h"
e9e899a2	13	#include "xfs_errortag.h"
1da177e4	14	#include "xfs_error.h"
c6840101	15	#include "xfs_sysfs.h"
22431bf3	16	#include "xfs_inode.h"
1da177e4 LT	17
	18	#ifdef DEBUG
	19
31965ef3 DW	20	static unsigned int xfs_errortag_random_default[] = {
	21	XFS_RANDOM_DEFAULT,
	22	XFS_RANDOM_IFLUSH_1,
	23	XFS_RANDOM_IFLUSH_2,
	24	XFS_RANDOM_IFLUSH_3,
	25	XFS_RANDOM_IFLUSH_4,
	26	XFS_RANDOM_IFLUSH_5,
	27	XFS_RANDOM_IFLUSH_6,
	28	XFS_RANDOM_DA_READ_BUF,
	29	XFS_RANDOM_BTREE_CHECK_LBLOCK,
	30	XFS_RANDOM_BTREE_CHECK_SBLOCK,
	31	XFS_RANDOM_ALLOC_READ_AGF,
	32	XFS_RANDOM_IALLOC_READ_AGI,
	33	XFS_RANDOM_ITOBP_INOTOBP,
	34	XFS_RANDOM_IUNLINK,
	35	XFS_RANDOM_IUNLINK_REMOVE,
	36	XFS_RANDOM_DIR_INO_VALIDATE,
	37	XFS_RANDOM_BULKSTAT_READ_CHUNK,
	38	XFS_RANDOM_IODONE_IOERR,
	39	XFS_RANDOM_STRATREAD_IOERR,
	40	XFS_RANDOM_STRATCMPL_IOERR,
	41	XFS_RANDOM_DIOWRITE_IOERR,
	42	XFS_RANDOM_BMAPIFORMAT,
	43	XFS_RANDOM_FREE_EXTENT,
	44	XFS_RANDOM_RMAP_FINISH_ONE,
	45	XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
	46	XFS_RANDOM_REFCOUNT_FINISH_ONE,
	47	XFS_RANDOM_BMAP_FINISH_ONE,
	48	XFS_RANDOM_AG_RESV_CRITICAL,
f8c47250	49	XFS_RANDOM_DROP_WRITES,
3e88a007	50	XFS_RANDOM_LOG_BAD_CRC,
7f4d01f3	51	XFS_RANDOM_LOG_ITEM_PIN,
7561d27e	52	XFS_RANDOM_BUF_LRU_REF,
84d42ea6	53	XFS_RANDOM_FORCE_SCRUB_REPAIR,
f467cad9	54	XFS_RANDOM_FORCE_SUMMARY_RECALC,
9b247179	55	XFS_RANDOM_IUNLINK_FALLBACK,
7376d745	56	XFS_RANDOM_BUF_IOERROR,
f9fa8716	57	XFS_RANDOM_REDUCE_MAX_IEXTENTS,
30151967	58	XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT,
2b92faed	59	XFS_RANDOM_AG_RESV_FAIL,
abd61ca3	60	XFS_RANDOM_LARP,
c3b948be	61	XFS_RANDOM_DA_LEAF_SPLIT,
c5218a7c	62	XFS_RANDOM_ATTR_LEAF_TO_NODE,
31965ef3	63	};
1da177e4	64
c6840101 DW	65	struct xfs_errortag_attr {
	66	struct attribute attr;
	67	unsigned int tag;
	68	};
	69
	70	static inline struct xfs_errortag_attr *
	71	to_attr(struct attribute *attr)
	72	{
	73	return container_of(attr, struct xfs_errortag_attr, attr);
	74	}
	75
	76	static inline struct xfs_mount *
	77	to_mp(struct kobject *kobject)
	78	{
	79	struct xfs_kobj *kobj = to_kobj(kobject);
	80
	81	return container_of(kobj, struct xfs_mount, m_errortag_kobj);
	82	}
	83
	84	STATIC ssize_t
	85	xfs_errortag_attr_store(
	86	struct kobject *kobject,
	87	struct attribute *attr,
	88	const char *buf,
	89	size_t count)
	90	{
	91	struct xfs_mount *mp = to_mp(kobject);
	92	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
	93	int ret;
	94	unsigned int val;
	95
	96	if (strcmp(buf, "default") == 0) {
	97	val = xfs_errortag_random_default[xfs_attr->tag];
	98	} else {
	99	ret = kstrtouint(buf, 0, &val);
	100	if (ret)
	101	return ret;
	102	}
	103
	104	ret = xfs_errortag_set(mp, xfs_attr->tag, val);
	105	if (ret)
	106	return ret;
	107	return count;
	108	}
	109
	110	STATIC ssize_t
	111	xfs_errortag_attr_show(
	112	struct kobject *kobject,
	113	struct attribute *attr,
	114	char *buf)
	115	{
	116	struct xfs_mount *mp = to_mp(kobject);
	117	struct xfs_errortag_attr *xfs_attr = to_attr(attr);
	118
	119	return snprintf(buf, PAGE_SIZE, "%u\n",
	120	xfs_errortag_get(mp, xfs_attr->tag));
	121	}
	122
	123	static const struct sysfs_ops xfs_errortag_sysfs_ops = {
	124	.show = xfs_errortag_attr_show,
	125	.store = xfs_errortag_attr_store,
	126	};
	127
	128	#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
129	static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
130	.attr = {.name = __stringify(_name), \
131	.mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR \| S_IRUGO) }, \
132	.tag = (_tag), \
133	}
134
135	#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
136
137	XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
138	XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
139	XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
140	XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
141	XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
142	XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
143	XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
144	XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
145	XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
146	XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
147	XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
148	XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
149	XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
150	XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
151	XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
152	XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
153	XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
154	XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
155	XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
156	XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
157	XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
158	XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
159	XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
160	XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
161	XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
162	XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
163	XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
164	XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
f8c47250	165	XFS_ERRORTAG_ATTR_RW(drop_writes, XFS_ERRTAG_DROP_WRITES);
3e88a007	166	XFS_ERRORTAG_ATTR_RW(log_bad_crc, XFS_ERRTAG_LOG_BAD_CRC);
7f4d01f3	167	XFS_ERRORTAG_ATTR_RW(log_item_pin, XFS_ERRTAG_LOG_ITEM_PIN);
7561d27e	168	XFS_ERRORTAG_ATTR_RW(buf_lru_ref, XFS_ERRTAG_BUF_LRU_REF);
84d42ea6	169	XFS_ERRORTAG_ATTR_RW(force_repair, XFS_ERRTAG_FORCE_SCRUB_REPAIR);
f467cad9	170	XFS_ERRORTAG_ATTR_RW(bad_summary, XFS_ERRTAG_FORCE_SUMMARY_RECALC);
9b247179	171	XFS_ERRORTAG_ATTR_RW(iunlink_fallback, XFS_ERRTAG_IUNLINK_FALLBACK);
7376d745	172	XFS_ERRORTAG_ATTR_RW(buf_ioerror, XFS_ERRTAG_BUF_IOERROR);
f9fa8716	173	XFS_ERRORTAG_ATTR_RW(reduce_max_iextents, XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
30151967	174	XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent, XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
2b92faed	175	XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
abd61ca3	176	XFS_ERRORTAG_ATTR_RW(larp, XFS_ERRTAG_LARP);
c3b948be	177	XFS_ERRORTAG_ATTR_RW(da_leaf_split, XFS_ERRTAG_DA_LEAF_SPLIT);
c5218a7c	178	XFS_ERRORTAG_ATTR_RW(attr_leaf_to_node, XFS_ERRTAG_ATTR_LEAF_TO_NODE);
c6840101 DW	179
	180	static struct attribute *xfs_errortag_attrs[] = {
	181	XFS_ERRORTAG_ATTR_LIST(noerror),
	182	XFS_ERRORTAG_ATTR_LIST(iflush1),
	183	XFS_ERRORTAG_ATTR_LIST(iflush2),
	184	XFS_ERRORTAG_ATTR_LIST(iflush3),
	185	XFS_ERRORTAG_ATTR_LIST(iflush4),
	186	XFS_ERRORTAG_ATTR_LIST(iflush5),
	187	XFS_ERRORTAG_ATTR_LIST(iflush6),
	188	XFS_ERRORTAG_ATTR_LIST(dareadbuf),
	189	XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
	190	XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
	191	XFS_ERRORTAG_ATTR_LIST(readagf),
	192	XFS_ERRORTAG_ATTR_LIST(readagi),
	193	XFS_ERRORTAG_ATTR_LIST(itobp),
	194	XFS_ERRORTAG_ATTR_LIST(iunlink),
	195	XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
	196	XFS_ERRORTAG_ATTR_LIST(dirinovalid),
	197	XFS_ERRORTAG_ATTR_LIST(bulkstat),
	198	XFS_ERRORTAG_ATTR_LIST(logiodone),
	199	XFS_ERRORTAG_ATTR_LIST(stratread),
	200	XFS_ERRORTAG_ATTR_LIST(stratcmpl),
	201	XFS_ERRORTAG_ATTR_LIST(diowrite),
	202	XFS_ERRORTAG_ATTR_LIST(bmapifmt),
	203	XFS_ERRORTAG_ATTR_LIST(free_extent),
	204	XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
	205	XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
	206	XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
	207	XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
	208	XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
f8c47250	209	XFS_ERRORTAG_ATTR_LIST(drop_writes),
3e88a007	210	XFS_ERRORTAG_ATTR_LIST(log_bad_crc),
7f4d01f3	211	XFS_ERRORTAG_ATTR_LIST(log_item_pin),
7561d27e	212	XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
84d42ea6	213	XFS_ERRORTAG_ATTR_LIST(force_repair),
f467cad9	214	XFS_ERRORTAG_ATTR_LIST(bad_summary),
9b247179	215	XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
7376d745	216	XFS_ERRORTAG_ATTR_LIST(buf_ioerror),
f9fa8716	217	XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
30151967	218	XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
2b92faed	219	XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
abd61ca3	220	XFS_ERRORTAG_ATTR_LIST(larp),
c3b948be	221	XFS_ERRORTAG_ATTR_LIST(da_leaf_split),
c5218a7c	222	XFS_ERRORTAG_ATTR_LIST(attr_leaf_to_node),
c6840101 DW	223	NULL,
c6840101 DW	224	};
219aac5d	225	ATTRIBUTE_GROUPS(xfs_errortag);
c6840101	226
4371155e	227	static struct kobj_type xfs_errortag_ktype = {
c6840101 DW	228	.release = xfs_sysfs_release,
c6840101 DW	229	.sysfs_ops = &xfs_errortag_sysfs_ops,
219aac5d	230	.default_groups = xfs_errortag_groups,
c6840101 DW	231	};
c6840101 DW	232
1da177e4	233	int
31965ef3 DW	234	xfs_errortag_init(
31965ef3 DW	235	struct xfs_mount *mp)
1da177e4	236	{
31965ef3	237	mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
707e0dda	238	KM_MAYFAIL);
31965ef3 DW	239	if (!mp->m_errortag)
31965ef3 DW	240	return -ENOMEM;
c6840101 DW	241
	242	return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
	243	&mp->m_kobj, "errortag");
31965ef3	244	}
1da177e4	245
31965ef3 DW	246	void
	247	xfs_errortag_del(
	248	struct xfs_mount *mp)
	249	{
c6840101	250	xfs_sysfs_del(&mp->m_errortag_kobj);
31965ef3 DW	251	kmem_free(mp->m_errortag);
31965ef3 DW	252	}
1da177e4	253
31965ef3 DW	254	bool
	255	xfs_errortag_test(
	256	struct xfs_mount *mp,
	257	const char *expression,
	258	const char *file,
	259	int line,
	260	unsigned int error_tag)
	261	{
	262	unsigned int randfactor;
1da177e4	263
d04c241c CM	264	/*
	265	* To be able to use error injection anywhere, we need to ensure error
	266	* injection mechanism is already initialized.
	267	*
	268	* Code paths like I/O completion can be called before the
	269	* initialization is complete, but be able to inject errors in such
	270	* places is still useful.
	271	*/
	272	if (!mp->m_errortag)
	273	return false;
	274
31965ef3 DW	275	ASSERT(error_tag < XFS_ERRTAG_MAX);
31965ef3 DW	276	randfactor = mp->m_errortag[error_tag];
81895a65	277	if (!randfactor \|\| prandom_u32_max(randfactor))
31965ef3	278	return false;
1da177e4	279
31965ef3 DW	280	xfs_warn_ratelimited(mp,
31965ef3 DW	281	"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
e1d3d218	282	expression, file, line, mp->m_super->s_id);
31965ef3	283	return true;
1da177e4 LT	284	}
1da177e4 LT	285
c6840101 DW	286	int
	287	xfs_errortag_get(
	288	struct xfs_mount *mp,
	289	unsigned int error_tag)
	290	{
	291	if (error_tag >= XFS_ERRTAG_MAX)
	292	return -EINVAL;
	293
	294	return mp->m_errortag[error_tag];
	295	}
	296
1da177e4	297	int
31965ef3 DW	298	xfs_errortag_set(
	299	struct xfs_mount *mp,
	300	unsigned int error_tag,
	301	unsigned int tag_value)
1da177e4	302	{
128f24d5 DW	303	if (error_tag >= XFS_ERRTAG_MAX)
	304	return -EINVAL;
	305
31965ef3 DW	306	mp->m_errortag[error_tag] = tag_value;
31965ef3 DW	307	return 0;
1da177e4 LT	308	}
1da177e4 LT	309
1da177e4	310	int
31965ef3 DW	311	xfs_errortag_add(
	312	struct xfs_mount *mp,
	313	unsigned int error_tag)
1da177e4	314	{
b2c2974b GX	315	BUILD_BUG_ON(ARRAY_SIZE(xfs_errortag_random_default) != XFS_ERRTAG_MAX);
b2c2974b GX	316
31965ef3 DW	317	if (error_tag >= XFS_ERRTAG_MAX)
31965ef3 DW	318	return -EINVAL;
1da177e4	319
31965ef3 DW	320	return xfs_errortag_set(mp, error_tag,
	321	xfs_errortag_random_default[error_tag]);
	322	}
1da177e4	323
31965ef3 DW	324	int
	325	xfs_errortag_clearall(
	326	struct xfs_mount *mp)
	327	{
	328	memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
1da177e4 LT	329	return 0;
1da177e4 LT	330	}
1550d0b0	331	#endif /* DEBUG */
1da177e4	332
1da177e4 LT	333	void
1da177e4 LT	334	xfs_error_report(
a0e856b0 AE	335	const char *tag,
	336	int level,
	337	struct xfs_mount *mp,
	338	const char *filename,
	339	int linenum,
d9418ed0	340	xfs_failaddr_t failaddr)
1da177e4 LT	341	{
1da177e4 LT	342	if (level <= xfs_error_level) {
6a19d939	343	xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
65dd297a	344	"Internal error %s at line %d of file %s. Caller %pS",
d9418ed0	345	tag, linenum, filename, failaddr);
1da177e4 LT	346
	347	xfs_stack_trace();
	348	}
	349	}
	350
1da177e4 LT	351	void
1da177e4 LT	352	xfs_corruption_error(
a0e856b0 AE	353	const char *tag,
	354	int level,
	355	struct xfs_mount *mp,
d243b89a	356	const void *buf,
2551a530	357	size_t bufsize,
a0e856b0 AE	358	const char *filename,
a0e856b0 AE	359	int linenum,
d9418ed0	360	xfs_failaddr_t failaddr)
1da177e4	361	{
6519f708	362	if (buf && level <= xfs_error_level)
2551a530	363	xfs_hex_dump(buf, bufsize);
d9418ed0	364	xfs_error_report(tag, level, mp, filename, linenum, failaddr);
65333b4c	365	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
1da177e4	366	}
ca23f8fd	367
a5155b87 DW	368	/*
	369	* Complain about the kinds of metadata corruption that we can't detect from a
	370	* verifier, such as incorrect inter-block relationship data. Does not set
	371	* bp->b_error.
8d57c216 DW	372	*
8d57c216 DW	373	* Call xfs_buf_mark_corrupt, not this function.
a5155b87 DW	374	*/
	375	void
	376	xfs_buf_corruption_error(
e83cf875 DW	377	struct xfs_buf *bp,
e83cf875 DW	378	xfs_failaddr_t fa)
a5155b87 DW	379	{
	380	struct xfs_mount *mp = bp->b_mount;
	381
	382	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
	383	"Metadata corruption detected at %pS, %s block 0x%llx",
9343ee76	384	fa, bp->b_ops->name, xfs_buf_daddr(bp));
a5155b87 DW	385
	386	xfs_alert(mp, "Unmount and run xfs_repair");
	387
	388	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
	389	xfs_stack_trace();
	390	}
	391
ca23f8fd ES	392	/*
	393	* Warnings specifically for verifier errors. Differentiate CRC vs. invalid
	394	* values, and omit the stack trace unless the error level is tuned high.
	395	*/
	396	void
6edb1810	397	xfs_buf_verifier_error(
31ca03c9	398	struct xfs_buf *bp,
bc1a09b8	399	int error,
6edb1810	400	const char *name,
d243b89a	401	const void *buf,
6edb1810	402	size_t bufsz,
bc1a09b8	403	xfs_failaddr_t failaddr)
ca23f8fd	404	{
dbd329f1	405	struct xfs_mount *mp = bp->b_mount;
bc1a09b8	406	xfs_failaddr_t fa;
6edb1810	407	int sz;
ca23f8fd	408
bc1a09b8 DW	409	fa = failaddr ? failaddr : __return_address;
bc1a09b8 DW	410	__xfs_buf_ioerror(bp, error, fa);
31ca03c9	411
d519da41 MB	412	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
d519da41 MB	413	"Metadata %s detected at %pS, %s block 0x%llx %s",
2451337d	414	bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
9343ee76	415	fa, bp->b_ops->name, xfs_buf_daddr(bp), name);
ca23f8fd ES	416
	417	xfs_alert(mp, "Unmount and run xfs_repair");
	418
	419	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
6edb1810	420	sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
9c712a13	421	xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
6edb1810 DW	422	sz);
6edb1810 DW	423	xfs_hex_dump(buf, sz);
ca23f8fd ES	424	}
	425
	426	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
	427	xfs_stack_trace();
	428	}
22431bf3	429
6edb1810 DW	430	/*
	431	* Warnings specifically for verifier errors. Differentiate CRC vs. invalid
	432	* values, and omit the stack trace unless the error level is tuned high.
	433	*/
	434	void
	435	xfs_verifier_error(
	436	struct xfs_buf *bp,
	437	int error,
	438	xfs_failaddr_t failaddr)
	439	{
	440	return xfs_buf_verifier_error(bp, error, "", xfs_buf_offset(bp, 0),
	441	XFS_CORRUPTION_DUMP_LEN, failaddr);
	442	}
	443
22431bf3 DW	444	/*
	445	* Warnings for inode corruption problems. Don't bother with the stack
	446	* trace unless the error level is turned up high.
	447	*/
	448	void
	449	xfs_inode_verifier_error(
	450	struct xfs_inode *ip,
	451	int error,
	452	const char *name,
d243b89a	453	const void *buf,
22431bf3 DW	454	size_t bufsz,
	455	xfs_failaddr_t failaddr)
	456	{
	457	struct xfs_mount *mp = ip->i_mount;
	458	xfs_failaddr_t fa;
	459	int sz;
	460
	461	fa = failaddr ? failaddr : __return_address;
	462
	463	xfs_alert(mp, "Metadata %s detected at %pS, inode 0x%llx %s",
	464	error == -EFSBADCRC ? "CRC error" : "corruption",
	465	fa, ip->i_ino, name);
	466
	467	xfs_alert(mp, "Unmount and run xfs_repair");
	468
	469	if (buf && xfs_error_level >= XFS_ERRLEVEL_LOW) {
	470	sz = min_t(size_t, XFS_CORRUPTION_DUMP_LEN, bufsz);
	471	xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
	472	sz);
	473	xfs_hex_dump(buf, sz);
	474	}
	475
	476	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
	477	xfs_stack_trace();
	478	}