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Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events

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With anything but fletcher-4, even a tiny change in the input will cause
the checksum value to change completely.  So knowing the actual and
expected checksums doesn't provide much more information than "they
don't match".  The harm in sending them is simply that they bloat the
event.  In particular, on FreeBSD the event must fit into a 1016 byte
buffer.

Fixes #14717 for mirrored pools.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Signed-off-by: Alan Somers <asomers@gmail.com>
Sponsored-by: Axcient
Closes #14717
Closes #15052
This commit is contained in:
Alan Somers 2023-07-11 15:13:57 -06:00 committed by Brian Behlendorf
parent 51a2b59767
commit b6f618f8ff
7 changed files with 2 additions and 20 deletions
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2
include/sys/fm/fs/zfs.h
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@ -102,8 +102,6 @@ extern "C" {
#define FM_EREPORT_PAYLOAD_ZFS_ZIO_TIMESTAMP "zio_timestamp"
#define FM_EREPORT_PAYLOAD_ZFS_ZIO_DELTA "zio_delta"
#define FM_EREPORT_PAYLOAD_ZFS_PREV_STATE "prev_state"
#define FM_EREPORT_PAYLOAD_ZFS_CKSUM_EXPECTED "cksum_expected"
#define FM_EREPORT_PAYLOAD_ZFS_CKSUM_ACTUAL "cksum_actual"
#define FM_EREPORT_PAYLOAD_ZFS_CKSUM_ALGO "cksum_algorithm"
#define FM_EREPORT_PAYLOAD_ZFS_CKSUM_BYTESWAP "cksum_byteswap"
#define FM_EREPORT_PAYLOAD_ZFS_BAD_OFFSET_RANGES "bad_ranges"

2
include/sys/zio_checksum.h
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@ -94,8 +94,6 @@ typedef const struct zio_checksum_info {
} zio_checksum_info_t;
typedef struct zio_bad_cksum {
zio_cksum_t zbc_expected;
zio_cksum_t zbc_actual;
const char *zbc_checksum_name;
uint8_t zbc_byteswapped;
uint8_t zbc_injected;

4
man/man8/zpool-events.8
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@ -305,10 +305,6 @@ The time when a given I/O request was submitted.
The time required to service a given I/O request.
.It Sy prev_state
The previous state of the vdev.
.It Sy cksum_expected
The expected checksum value for the block.
.It Sy cksum_actual
The actual checksum value for an errant block.
.It Sy cksum_algorithm
Checksum algorithm used.
See

2
module/zfs/vdev_indirect.c
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@ -1398,7 +1398,7 @@ vdev_indirect_checksum_error(zio_t *zio,
vd->vdev_stat.vs_checksum_errors++;
mutex_exit(&vd->vdev_stat_lock);
zio_bad_cksum_t zbc = {{{ 0 }}};
zio_bad_cksum_t zbc = { 0 };
abd_t *bad_abd = ic->ic_data;
abd_t *good_abd = is->is_good_child->ic_data;
(void) zfs_ereport_post_checksum(zio->io_spa, vd, NULL, zio,

2
module/zfs/vdev_raidz.c
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@ -1785,7 +1785,7 @@ vdev_raidz_checksum_error(zio_t *zio, raidz_col_t *rc, abd_t *bad_data)
static int
raidz_checksum_verify(zio_t *zio)
{
zio_bad_cksum_t zbc = {{{0}}};
zio_bad_cksum_t zbc = {0};
raidz_map_t *rm = zio->io_vsd;
int ret = zio_checksum_error(zio, &zbc);

8
module/zfs/zfs_fm.c
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@ -914,14 +914,6 @@ annotate_ecksum(nvlist_t *ereport, zio_bad_cksum_t *info,
if (info != NULL && info->zbc_has_cksum) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_EXPECTED,
DATA_TYPE_UINT64_ARRAY,
sizeof (info->zbc_expected) / sizeof (uint64_t),
(uint64_t *)&info->zbc_expected,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_ACTUAL,
DATA_TYPE_UINT64_ARRAY,
sizeof (info->zbc_actual) / sizeof (uint64_t),
(uint64_t *)&info->zbc_actual,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_ALGO,
DATA_TYPE_STRING,
info->zbc_checksum_name,

2
module/zfs/zio_checksum.c
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@ -515,8 +515,6 @@ zio_checksum_error_impl(spa_t *spa, const blkptr_t *bp,
}
if (info != NULL) {
info->zbc_expected = expected_cksum;
info->zbc_actual = actual_cksum;
info->zbc_checksum_name = ci->ci_name;
info->zbc_byteswapped = byteswap;
info->zbc_injected = 0;