Brian Foster 609adfc2ed xfs: debug mode log record crc error injection ... XFS now uses CRC verification over a limited section of the log to detect torn writes prior to a crash. This is difficult to test directly due to the timing and hardware requirements to cause a short write. Add a mechanism to inject CRC errors into log records to facilitate testing torn write detection during log recovery. This mechanism is dangerous and can result in filesystem corruption. Thus, it is only available in DEBUG mode for testing/development purposes. Set a non-zero value to the following sysfs entry to enable error injection: /sys/fs/xfs/<dev>/log/log_badcrc_factor Once enabled, XFS intentionally writes an invalid CRC to a log record at some random point in the future based on the provided frequency. The filesystem immediately shuts down once the record has been written to the physical log to prevent metadata writeback (e.g., AIL insertion) once the log write completes. This helps reasonably simulate a torn write to the log as the affected record must be safe to discard. The next mount after the intentional shutdown requires log recovery and should detect and recover from the torn write. Note again that this _will_ result in data loss or worse. For testing and development purposes only! Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>		2016-01-05 07:41:16 +11:00
..
libxfs	xfs: support a crc verification only log record pass	2016-01-04 15:55:10 +11:00
Kconfig	xfs: require 64-bit sector_t	2014-07-30 09:12:05 +10:00
kmem.c	xfs: more info from kmem deadlocks and high-level error msgs	2015-10-12 16:04:45 +11:00
kmem.h	xfs: change kmem_free to use generic kvfree()	2015-02-02 09:54:18 +11:00
Makefile	xfs: stats are no longer dependent on CONFIG_PROC_FS	2015-10-19 08:42:46 +11:00
mrlock.h
uuid.c
uuid.h
xfs_acl.c	xfs: Fix error path in xfs_get_acl	2015-11-10 10:09:45 +11:00
xfs_acl.h	xfs: Fix error path in xfs_get_acl	2015-11-10 10:09:45 +11:00
xfs_aops.c	Merge branch 'xfs-dax-updates' into for-next	2015-11-03 13:28:41 +11:00
xfs_aops.h	xfs: DAX does not use IO completion callbacks	2015-11-03 12:37:02 +11:00
xfs_attr_inactive.c	Merge branch 'xfs-misc-fixes-for-4.2-3' into for-next	2015-06-23 08:49:01 +10:00
xfs_attr_list.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_attr.h
xfs_bmap_util.c	Merge branch 'xfs-dax-updates' into for-next	2015-11-03 13:28:41 +11:00
xfs_bmap_util.h	xfs: Add support FALLOC_FL_INSERT_RANGE for fallocate	2015-03-25 15:08:56 +11:00
xfs_buf_item.c	Merge branch 'xfs-misc-fixes-for-4.3-3' into for-next	2015-08-25 10:13:35 +10:00
xfs_buf_item.h	xfs: fix non-debug build warnings	2015-08-25 10:05:13 +10:00
xfs_buf.c	Merge branch 'xfs-misc-fixes-for-4.4-1' into for-next	2015-10-12 18:38:25 +11:00
xfs_buf.h	dax: move DAX-related functions to a new header	2015-09-08 15:35:28 -07:00
xfs_dir2_readdir.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_discard.c	xfs: pass mp to XFS_WANT_CORRUPTED_GOTO	2015-02-23 22:39:08 +11:00
xfs_discard.h
xfs_dquot_item.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_dquot_item.h	xfs: remove the quotaoff log format from the quotaoff log item	2013-12-13 11:34:08 +11:00
xfs_dquot.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_dquot.h	xfs: fix implicit bool to int conversion	2015-01-09 10:48:58 +11:00
xfs_error.c	xfs: remove inst_t	2015-06-22 09:44:02 +10:00
xfs_error.h	xfs: remove inst_t	2015-06-22 09:44:02 +10:00
xfs_export.c	VFS: normal filesystems (and lustre): d_inode() annotations	2015-04-15 15:06:57 -04:00
xfs_export.h
xfs_extent_busy.c	xfs: merge xfs_ag.h into xfs_format.h	2014-11-28 14:25:04 +11:00
xfs_extent_busy.h
xfs_extfree_item.c	xfs: add helper to conditionally remove items from the AIL	2015-08-19 10:01:08 +10:00
xfs_extfree_item.h	xfs: fix efi/efd error handling to avoid fs shutdown hangs	2015-08-19 09:51:16 +10:00
xfs_file.c	xfs: updates for 4.4-rc1	2015-11-11 20:18:48 -08:00
xfs_filestream.c	xfs: clean up XFS_MIN_FREELIST macros	2015-06-22 10:13:30 +10:00
xfs_filestream.h	xfs: add filestream allocator tracepoints	2014-04-23 07:11:52 +10:00
xfs_fsops.c	xfs: growfs not aware of sb_meta_uuid	2015-08-19 10:31:41 +10:00
xfs_fsops.h
xfs_globals.c	xfs: export log_recovery_delay to delay mount time log recovery	2014-09-09 11:56:13 +10:00
xfs_icache.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_icache.h	xfs: merge xfs_ag.h into xfs_format.h	2014-11-28 14:25:04 +11:00
xfs_icreate_item.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_icreate_item.h
xfs_inode_item.c	xfs: optimise away log forces on timestamp updates for fdatasync	2015-11-03 13:14:59 +11:00
xfs_inode_item.h	xfs: optimise away log forces on timestamp updates for fdatasync	2015-11-03 13:14:59 +11:00
xfs_inode.c	Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next	2015-11-03 13:27:58 +11:00
xfs_inode.h	xfs: clean up inode lockdep annotations	2015-08-19 10:32:49 +10:00
xfs_ioctl32.c	xfs: prefix XATTR_LIST_MAX with XFS_	2015-10-12 16:02:56 +11:00
xfs_ioctl32.h	xfs: compat_xfs_bstat does not have forkoff	2014-10-02 09:17:58 +10:00
xfs_ioctl.c	Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next	2015-11-03 13:27:58 +11:00
xfs_ioctl.h
xfs_iomap.c	Merge branch 'xfs-dax-updates' into for-next	2015-11-03 13:28:41 +11:00
xfs_iomap.h	xfs: pass a 64-bit count argument to xfs_iomap_write_unwritten	2015-01-09 10:48:12 +11:00
xfs_iops.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_iops.h	xfs: inodes are new until the dentry cache is set up	2015-02-23 22:38:08 +11:00
xfs_itable.c	xfs: fix btree cursor error cleanups	2015-08-19 10:00:53 +10:00
xfs_itable.h	xfs: bulkstat chunk formatting cursor is broken	2014-11-07 08:30:30 +11:00
xfs_linux.h	xfs: pass xfsstats structures to handlers and macros	2015-10-12 05:19:45 +11:00
xfs_log_cil.c	xfs: close xc_cil list_empty() races with cil commit sequence	2015-07-29 11:51:01 +10:00
xfs_log_priv.h	xfs: debug mode log record crc error injection	2016-01-05 07:41:16 +11:00
xfs_log_recover.c	xfs: detect and trim torn writes during log recovery	2016-01-05 07:40:16 +11:00
xfs_log.c	xfs: debug mode log record crc error injection	2016-01-05 07:41:16 +11:00
xfs_log.h	xfs: validate metadata LSNs against log on v5 superblocks	2015-10-12 15:59:25 +11:00
xfs_message.c	xfs: more info from kmem deadlocks and high-level error msgs	2015-10-12 16:04:45 +11:00
xfs_message.h
xfs_mount.c	Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next	2015-11-03 13:27:58 +11:00
xfs_mount.h	Merge branch 'xfs-dax-updates' into for-next	2015-11-03 13:28:41 +11:00
xfs_mru_cache.c	xfs: xfs_mru_cache_insert() should use GFP_NOFS	2015-03-25 14:57:53 +11:00
xfs_mru_cache.h	xfs: embedd mru_elem into parent structure	2014-04-23 07:11:51 +10:00
xfs_pnfs.c	xfs: add missing ilock around dio write last extent alignment	2015-10-12 15:34:20 +11:00
xfs_pnfs.h	xfs: unlock i_mutex in xfs_break_layouts	2015-04-13 11:38:29 +10:00
xfs_qm_bhv.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_qm_syscalls.c	xfs: saner xfs_trans_commit interface	2015-06-04 13:48:08 +10:00
xfs_qm.c	xfs: updates for 4.4-rc1	2015-11-11 20:18:48 -08:00
xfs_qm.h	xfs: Convert to using ->get_state callback	2015-03-04 16:06:36 +01:00
xfs_quota.h	xfs: fix quota block reservation leak when tp allocates and frees blocks	2015-06-01 07:15:37 +10:00
xfs_quotaops.c	xfs: Add support for Q_SETINFO	2015-03-04 16:06:38 +01:00
xfs_rtalloc.c	xfs: add missing bmap cancel calls in error paths	2015-08-19 10:01:40 +10:00
xfs_rtalloc.h	xfs: combine xfs_rtmodify_summary and xfs_rtget_summary	2014-09-09 11:58:42 +10:00
xfs_stats.c	xfs: stats are no longer dependent on CONFIG_PROC_FS	2015-10-19 08:42:46 +11:00
xfs_stats.h	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_super.c	Merge branch 'xfs-misc-fixes-for-4.4-3' into for-next	2015-11-10 10:20:48 +11:00
xfs_super.h	xfs: Remove icsb infrastructure	2015-02-23 21:22:31 +11:00
xfs_symlink.c	Merge branch 'xfs-misc-fixes-for-4.3-2' into for-next	2015-08-20 09:28:45 +10:00
xfs_symlink.h
xfs_sysctl.c	xfs: pass xfsstats structures to handlers and macros	2015-10-12 05:19:45 +11:00
xfs_sysctl.h	xfs: export log_recovery_delay to delay mount time log recovery	2014-09-09 11:56:13 +10:00
xfs_sysfs.c	xfs: debug mode log record crc error injection	2016-01-05 07:41:16 +11:00
xfs_sysfs.h	xfs: create global stats and stats_clear in sysfs	2015-10-12 05:15:45 +11:00
xfs_trace.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_trace.h	Merge branch 'xfs-dax-updates' into for-next	2015-11-03 13:28:41 +11:00
xfs_trans_ail.c	Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next	2015-11-03 13:27:58 +11:00
xfs_trans_buf.c	xfs: only trace buffer items if they exist	2015-02-10 09:23:40 +11:00
xfs_trans_dquot.c	xfs: Clean up xfs_trans_dup_dqinfo	2015-06-01 10:50:00 +10:00
xfs_trans_extfree.c	xfs: ensure EFD trans aborts on log recovery extent free failure	2015-08-19 09:51:43 +10:00
xfs_trans_inode.c	xfs: optimise away log forces on timestamp updates for fdatasync	2015-11-03 13:14:59 +11:00
xfs_trans_priv.h	xfs: add helper to conditionally remove items from the AIL	2015-08-19 10:01:08 +10:00
xfs_trans.c	xfs: per-filesystem stats counter implementation	2015-10-12 18:21:22 +11:00
xfs_trans.h	xfs: ensure EFD trans aborts on log recovery extent free failure	2015-08-19 09:51:43 +10:00
xfs_xattr.c	Merge branch 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-11-13 18:02:30 -08:00
xfs.h