From 6fd87e1d8df1cab8d6087026cbc361a0886a2a97 Mon Sep 17 00:00:00 2001 From: Alan Somers Date: Tue, 11 Jul 2023 15:13:57 -0600 Subject: [PATCH] Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events 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 Reviewed-by: Rich Ercolani Signed-off-by: Alan Somers Sponsored-by: Axcient Closes #14717 Closes #15052 --- include/sys/fm/fs/zfs.h | 2 -- include/sys/zio_checksum.h | 2 -- man/man8/zpool-events.8 | 4 ---- module/zfs/vdev_indirect.c | 2 +- module/zfs/vdev_raidz.c | 2 +- module/zfs/zfs_fm.c | 8 -------- module/zfs/zio_checksum.c | 2 -- 7 files changed, 2 insertions(+), 20 deletions(-) diff --git a/include/sys/fm/fs/zfs.h b/include/sys/fm/fs/zfs.h index 3cf2b1274..fb9e86492 100644 --- a/include/sys/fm/fs/zfs.h +++ b/include/sys/fm/fs/zfs.h @@ -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" diff --git a/include/sys/zio_checksum.h b/include/sys/zio_checksum.h index 9fb79ab4a..37fd65b7c 100644 --- a/include/sys/zio_checksum.h +++ b/include/sys/zio_checksum.h @@ -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; diff --git a/man/man8/zpool-events.8 b/man/man8/zpool-events.8 index c3bd3208e..e1436f6de 100644 --- a/man/man8/zpool-events.8 +++ b/man/man8/zpool-events.8 @@ -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 diff --git a/module/zfs/vdev_indirect.c b/module/zfs/vdev_indirect.c index 896675853..acb725696 100644 --- a/module/zfs/vdev_indirect.c +++ b/module/zfs/vdev_indirect.c @@ -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, diff --git a/module/zfs/vdev_raidz.c b/module/zfs/vdev_raidz.c index 14b98a76b..3445fa9d3 100644 --- a/module/zfs/vdev_raidz.c +++ b/module/zfs/vdev_raidz.c @@ -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); diff --git a/module/zfs/zfs_fm.c b/module/zfs/zfs_fm.c index 9365ca500..c4eb74e87 100644 --- a/module/zfs/zfs_fm.c +++ b/module/zfs/zfs_fm.c @@ -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, diff --git a/module/zfs/zio_checksum.c b/module/zfs/zio_checksum.c index 6090959c5..9de515e87 100644 --- a/module/zfs/zio_checksum.c +++ b/module/zfs/zio_checksum.c @@ -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;