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https://github.com/torvalds/linux.git
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c2beff99eb
Add a new error injection knob so that we can arbitrarily slow down
writeback to test for race conditions and aberrant reclaim behavior if
the writeback mechanisms are slow to issue writeback. This will enable
functional testing for the ifork sequence counters introduced in commit
745b3f76d1 ("xfs: maintain a sequence count for inode fork
manipulations").
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_ERROR_H__
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#define __XFS_ERROR_H__
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struct xfs_mount;
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extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
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const char *filename, int linenum,
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xfs_failaddr_t failaddr);
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extern void xfs_corruption_error(const char *tag, int level,
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struct xfs_mount *mp, const void *buf, size_t bufsize,
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const char *filename, int linenum,
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xfs_failaddr_t failaddr);
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void xfs_buf_corruption_error(struct xfs_buf *bp, xfs_failaddr_t fa);
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extern void xfs_buf_verifier_error(struct xfs_buf *bp, int error,
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const char *name, const void *buf, size_t bufsz,
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xfs_failaddr_t failaddr);
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extern void xfs_verifier_error(struct xfs_buf *bp, int error,
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xfs_failaddr_t failaddr);
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extern void xfs_inode_verifier_error(struct xfs_inode *ip, int error,
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const char *name, const void *buf, size_t bufsz,
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xfs_failaddr_t failaddr);
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#define XFS_ERROR_REPORT(e, lvl, mp) \
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xfs_error_report(e, lvl, mp, __FILE__, __LINE__, __return_address)
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#define XFS_CORRUPTION_ERROR(e, lvl, mp, buf, bufsize) \
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xfs_corruption_error(e, lvl, mp, buf, bufsize, \
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__FILE__, __LINE__, __return_address)
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#define XFS_ERRLEVEL_OFF 0
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#define XFS_ERRLEVEL_LOW 1
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#define XFS_ERRLEVEL_HIGH 5
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/* Dump 128 bytes of any corrupt buffer */
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#define XFS_CORRUPTION_DUMP_LEN (128)
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#ifdef DEBUG
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extern int xfs_errortag_init(struct xfs_mount *mp);
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extern void xfs_errortag_del(struct xfs_mount *mp);
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extern bool xfs_errortag_test(struct xfs_mount *mp, const char *expression,
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const char *file, int line, unsigned int error_tag);
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#define XFS_TEST_ERROR(expr, mp, tag) \
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((expr) || xfs_errortag_test((mp), #expr, __FILE__, __LINE__, (tag)))
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bool xfs_errortag_enabled(struct xfs_mount *mp, unsigned int tag);
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#define XFS_ERRORTAG_DELAY(mp, tag) \
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do { \
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might_sleep(); \
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if (!xfs_errortag_enabled((mp), (tag))) \
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break; \
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xfs_warn_ratelimited((mp), \
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"Injecting %ums delay at file %s, line %d, on filesystem \"%s\"", \
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(mp)->m_errortag[(tag)], __FILE__, __LINE__, \
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(mp)->m_super->s_id); \
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mdelay((mp)->m_errortag[(tag)]); \
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} while (0)
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extern int xfs_errortag_get(struct xfs_mount *mp, unsigned int error_tag);
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extern int xfs_errortag_set(struct xfs_mount *mp, unsigned int error_tag,
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unsigned int tag_value);
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extern int xfs_errortag_add(struct xfs_mount *mp, unsigned int error_tag);
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extern int xfs_errortag_clearall(struct xfs_mount *mp);
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#else
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#define xfs_errortag_init(mp) (0)
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#define xfs_errortag_del(mp)
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#define XFS_TEST_ERROR(expr, mp, tag) (expr)
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#define XFS_ERRORTAG_DELAY(mp, tag) ((void)0)
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#define xfs_errortag_set(mp, tag, val) (ENOSYS)
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#define xfs_errortag_add(mp, tag) (ENOSYS)
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#define xfs_errortag_clearall(mp) (ENOSYS)
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#endif /* DEBUG */
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/*
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* XFS panic tags -- allow a call to xfs_alert_tag() be turned into
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* a panic by setting xfs_panic_mask in a sysctl.
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*/
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#define XFS_NO_PTAG 0u
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#define XFS_PTAG_IFLUSH (1u << 0)
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#define XFS_PTAG_LOGRES (1u << 1)
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#define XFS_PTAG_AILDELETE (1u << 2)
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#define XFS_PTAG_ERROR_REPORT (1u << 3)
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#define XFS_PTAG_SHUTDOWN_CORRUPT (1u << 4)
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#define XFS_PTAG_SHUTDOWN_IOERROR (1u << 5)
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#define XFS_PTAG_SHUTDOWN_LOGERROR (1u << 6)
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#define XFS_PTAG_FSBLOCK_ZERO (1u << 7)
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#define XFS_PTAG_VERIFIER_ERROR (1u << 8)
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#define XFS_PTAG_STRINGS \
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{ XFS_NO_PTAG, "none" }, \
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{ XFS_PTAG_IFLUSH, "iflush" }, \
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{ XFS_PTAG_LOGRES, "logres" }, \
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{ XFS_PTAG_AILDELETE, "aildelete" }, \
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{ XFS_PTAG_ERROR_REPORT , "error_report" }, \
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{ XFS_PTAG_SHUTDOWN_CORRUPT, "corrupt" }, \
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{ XFS_PTAG_SHUTDOWN_IOERROR, "ioerror" }, \
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{ XFS_PTAG_SHUTDOWN_LOGERROR, "logerror" }, \
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{ XFS_PTAG_FSBLOCK_ZERO, "fsb_zero" }, \
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{ XFS_PTAG_VERIFIER_ERROR, "verifier" }
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#endif /* __XFS_ERROR_H__ */
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