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zdb: Filter log spacemaps by vdev

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When requested to dump metaslabs only for specific vdev, apply the
filter also to log spacemaps to reduce the output.  Unfortunately
filtering by metaslab numbers is more difficult so leave those.

While there, tune the output formatting.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Alexander Motin <[email protected]>
Closes #17643
This commit is contained in:
Alexander Motin authored and GitHub committed 2025-08-21 11:19:46 -04:00
1 parent 574eec2964
commit 94413bc75d
1 file changed
+22 -15
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cmd/zdb/zdb.c
+22 -15
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@@ -1586,9 +1586,8 @@ dump_spacemap(objset_t *os, space_map_t *sm)
continue;
}
uint8_t words;
char entry_type;
uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
uint64_t entry_off, entry_run, entry_vdev;
if (sm_entry_is_single_word(word)) {
entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
@@ -1596,35 +1595,43 @@ dump_spacemap(objset_t *os, space_map_t *sm)
entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
sm->sm_start;
entry_run = SM_RUN_DECODE(word) << mapshift;
words = 1;
(void) printf("\t [%6llu] %c "
"range: %012llx-%012llx size: %08llx\n",
(u_longlong_t)entry_id, entry_type,
(u_longlong_t)entry_off,
(u_longlong_t)(entry_off + entry_run - 1),
(u_longlong_t)entry_run);
} else {
/* it is a two-word entry so we read another word */
ASSERT(sm_entry_is_double_word(word));
uint64_t extra_word;
offset += sizeof (extra_word);
ASSERT3U(offset, <, space_map_length(sm));
VERIFY0(dmu_read(os, space_map_object(sm), offset,
sizeof (extra_word), &extra_word,
DMU_READ_PREFETCH));
ASSERT3U(offset, <=, space_map_length(sm));
entry_run = SM2_RUN_DECODE(word) << mapshift;
entry_vdev = SM2_VDEV_DECODE(word);
entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
'A' : 'F';
entry_off = (SM2_OFFSET_DECODE(extra_word) <<
mapshift) + sm->sm_start;
words = 2;
}
(void) printf("\t [%6llu] %c range:"
" %010llx-%010llx size: %06llx vdev: %06llu words: %u\n",
(u_longlong_t)entry_id,
entry_type, (u_longlong_t)entry_off,
(u_longlong_t)(entry_off + entry_run),
(u_longlong_t)entry_run,
(u_longlong_t)entry_vdev, words);
if (zopt_metaslab_args == 0 ||
zopt_metaslab[0] == entry_vdev) {
(void) printf("\t [%6llu] %c "
"range: %012llx-%012llx size: %08llx "
"vdev: %llu\n",
(u_longlong_t)entry_id, entry_type,
(u_longlong_t)entry_off,
(u_longlong_t)(entry_off + entry_run - 1),
(u_longlong_t)entry_run,
(u_longlong_t)entry_vdev);
}
}
if (entry_type == 'A')
alloc += entry_run;
@@ -1873,7 +1880,7 @@ dump_metaslabs(spa_t *spa)
(void) printf("\nMetaslabs:\n");
if (!dump_opt['d'] && zopt_metaslab_args > 0) {
if (zopt_metaslab_args > 0) {
c = zopt_metaslab[0];
if (c >= children)