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xfs: replace log_badcrc_factor knob with error injection tag

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Now that error injection tags support dynamic frequency adjustment,
replace the debug mode sysfs knob that controls log record CRC error
injection with an error injection tag.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Brian Foster 2017-06-27 09:52:32 -07:00 committed by Darrick J. Wong
parent f8c47250ba
commit 3e88a0078b
4 changed files with 7 additions and 41 deletions
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3
fs/xfs/xfs_error.c
View file

@ -56,6 +56,7 @@ static unsigned int xfs_errortag_random_default[] = {
XFS_RANDOM_BMAP_FINISH_ONE,
XFS_RANDOM_AG_RESV_CRITICAL,
XFS_RANDOM_DROP_WRITES,
XFS_RANDOM_LOG_BAD_CRC,
};
struct xfs_errortag_attr {
@ -159,6 +160,7 @@ 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);
static struct attribute *xfs_errortag_attrs[] = {
XFS_ERRORTAG_ATTR_LIST(noerror),
@ -190,6 +192,7 @@ static struct attribute *xfs_errortag_attrs[] = {
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),
NULL,
};

4
fs/xfs/xfs_error.h
View file

@ -105,7 +105,8 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
* handling sequence.
*/
#define XFS_ERRTAG_DROP_WRITES 28
#define XFS_ERRTAG_MAX 29
#define XFS_ERRTAG_LOG_BAD_CRC 29
#define XFS_ERRTAG_MAX 30
/*
* Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@ -139,6 +140,7 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_RANDOM_BMAP_FINISH_ONE 1
#define XFS_RANDOM_AG_RESV_CRITICAL 4
#define XFS_RANDOM_DROP_WRITES 1
#define XFS_RANDOM_LOG_BAD_CRC 1
#ifdef DEBUG
extern int xfs_errortag_init(struct xfs_mount *mp);

5
fs/xfs/xfs_log.c
View file

@ -1841,7 +1841,6 @@ xlog_sync(
/* calculcate the checksum */
iclog->ic_header.h_crc = xlog_cksum(log, &iclog->ic_header,
iclog->ic_datap, size);
#ifdef DEBUG
/*
* Intentionally corrupt the log record CRC based on the error injection
* frequency, if defined. This facilitates testing log recovery in the
@ -1849,15 +1848,13 @@ xlog_sync(
* write on I/O completion and shutdown the fs. The subsequent mount
* detects the bad CRC and attempts to recover.
*/
if (log->l_badcrc_factor &&
(prandom_u32() % log->l_badcrc_factor == 0)) {
if (XFS_TEST_ERROR(false, log->l_mp, XFS_ERRTAG_LOG_BAD_CRC)) {
iclog->ic_header.h_crc &= cpu_to_le32(0xAAAAAAAA);
iclog->ic_state |= XLOG_STATE_IOABORT;
xfs_warn(log->l_mp,
"Intentionally corrupted log record at LSN 0x%llx. Shutdown imminent.",
be64_to_cpu(iclog->ic_header.h_lsn));
}
#endif
bp->b_io_length = BTOBB(count);
bp->b_fspriv = iclog;

36
fs/xfs/xfs_sysfs.c
View file

@ -305,47 +305,11 @@ write_grant_head_show(
}
XFS_SYSFS_ATTR_RO(write_grant_head);
#ifdef DEBUG
STATIC ssize_t
log_badcrc_factor_store(
struct kobject *kobject,
const char *buf,
size_t count)
{
struct xlog *log = to_xlog(kobject);
int ret;
uint32_t val;
ret = kstrtouint(buf, 0, &val);
if (ret)
return ret;
log->l_badcrc_factor = val;
return count;
}
STATIC ssize_t
log_badcrc_factor_show(
struct kobject *kobject,
char *buf)
{
struct xlog *log = to_xlog(kobject);
return snprintf(buf, PAGE_SIZE, "%d\n", log->l_badcrc_factor);
}
XFS_SYSFS_ATTR_RW(log_badcrc_factor);
#endif /* DEBUG */
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),
#ifdef DEBUG
ATTR_LIST(log_badcrc_factor),
#endif
NULL,
};