From 2fbc542ebdee773ab45fd0d35029d6978aa5900b Mon Sep 17 00:00:00 2001 From: George Wilson Date: Fri, 4 Oct 2013 14:13:23 -0800 Subject: [PATCH] Illumos 4168, 4169, 4170: ztest, zdb and zhack fixes 4168 ztest assertion failure in dbuf_undirty 4169 verbatim import causes zdb to segfault 4170 zhack leaves pool in ACTIVE state Reviewed by: Adam Leventhal Reviewed by: Eric Schrock Reviewed by: Matthew Ahrens Approved by: Dan McDonald References: https://www.illumos.org/issues/4168 https://www.illumos.org/issues/4169 https://www.illumos.org/issues/4170 https://github.com/illumos/illumos-gate/commit/7fdd916 Porting notes: Of particular interest when troubleshooting corrupted pools, the commonly-used "zdb -e" operation may perform verbatim imports and furthermore, it will soon have direct support for verbatim imports via a new "-V" option. The 4169 fix eliminates a common segfault case in which spa_history_log_version() tries to access an un-opened dsl_pool_t. Ported by: Tim Chase Signed-off-by: Brian Behlendorf Closes #2451 Closes #2283 Closes #2467 --- cmd/zhack/zhack.c | 49 +++++++++++++++++++++++++++++------------------ module/zfs/dbuf.c | 8 -------- module/zfs/spa.c | 2 -- 3 files changed, 30 insertions(+), 29 deletions(-) diff --git a/cmd/zhack/zhack.c b/cmd/zhack/zhack.c index 64ab8edbbc..ab84046a14 100644 --- a/cmd/zhack/zhack.c +++ b/cmd/zhack/zhack.c @@ -20,7 +20,7 @@ */ /* - * Copyright (c) 2012 by Delphix. All rights reserved. + * Copyright (c) 2013 by Delphix. All rights reserved. * Copyright (c) 2013 Steven Hartland. All rights reserved. */ @@ -84,10 +84,15 @@ usage(void) static void -fatal(const char *fmt, ...) +fatal(spa_t *spa, void *tag, const char *fmt, ...) { va_list ap; + if (spa != NULL) { + spa_close(spa, tag); + (void) spa_export(g_pool, NULL, B_TRUE, B_FALSE); + } + va_start(ap, fmt); (void) fprintf(stderr, "%s: ", cmdname); (void) vfprintf(stderr, fmt, ap); @@ -158,13 +163,14 @@ import_pool(const char *target, boolean_t readonly) g_importargs.can_be_active = B_TRUE; if (zpool_search_import(g_zfs, &g_importargs) != NULL || spa_open(target, &spa, FTAG) == 0) { - fatal("cannot import '%s': pool is active; run " - "\"zpool export %s\" first\n", - g_pool, g_pool); + fatal(spa, FTAG, "cannot import '%s': pool is " + "active; run " "\"zpool export %s\" " + "first\n", g_pool, g_pool); } } - fatal("cannot import '%s': no such pool available\n", g_pool); + fatal(NULL, FTAG, "cannot import '%s': no such pool " + "available\n", g_pool); } elem = nvlist_next_nvpair(pools, NULL); @@ -185,7 +191,8 @@ import_pool(const char *target, boolean_t readonly) error = 0; if (error) - fatal("can't import '%s': %s", name, strerror(error)); + fatal(NULL, FTAG, "can't import '%s': %s", name, + strerror(error)); } static void @@ -200,10 +207,11 @@ zhack_spa_open(const char *target, boolean_t readonly, void *tag, spa_t **spa) zfeature_checks_disable = B_FALSE; if (err != 0) - fatal("cannot open '%s': %s", target, strerror(err)); + fatal(*spa, FTAG, "cannot open '%s': %s", target, + strerror(err)); if (spa_version(*spa) < SPA_VERSION_FEATURES) { - fatal("'%s' has version %d, features not enabled", target, - (int)spa_version(*spa)); + fatal(*spa, FTAG, "'%s' has version %d, features not enabled", + target, (int)spa_version(*spa)); } } @@ -336,15 +344,16 @@ zhack_do_feature_enable(int argc, char **argv) feature.fi_guid = argv[1]; if (!zfeature_is_valid_guid(feature.fi_guid)) - fatal("invalid feature guid: %s", feature.fi_guid); + fatal(NULL, FTAG, "invalid feature guid: %s", feature.fi_guid); zhack_spa_open(target, B_FALSE, FTAG, &spa); mos = spa->spa_meta_objset; if (0 == zfeature_lookup_guid(feature.fi_guid, NULL)) - fatal("'%s' is a real feature, will not enable"); + fatal(spa, FTAG, "'%s' is a real feature, will not enable"); if (0 == zap_contains(mos, spa->spa_feat_desc_obj, feature.fi_guid)) - fatal("feature already enabled: %s", feature.fi_guid); + fatal(spa, FTAG, "feature already enabled: %s", + feature.fi_guid); VERIFY0(dsl_sync_task(spa_name(spa), NULL, feature_enable_sync, &feature, 5)); @@ -423,13 +432,14 @@ zhack_do_feature_ref(int argc, char **argv) feature.fi_guid = argv[1]; if (!zfeature_is_valid_guid(feature.fi_guid)) - fatal("invalid feature guid: %s", feature.fi_guid); + fatal(NULL, FTAG, "invalid feature guid: %s", feature.fi_guid); zhack_spa_open(target, B_FALSE, FTAG, &spa); mos = spa->spa_meta_objset; if (0 == zfeature_lookup_guid(feature.fi_guid, NULL)) - fatal("'%s' is a real feature, will not change refcount"); + fatal(spa, FTAG, "'%s' is a real feature, will not change " + "refcount"); if (0 == zap_contains(mos, spa->spa_feat_for_read_obj, feature.fi_guid)) { @@ -438,11 +448,12 @@ zhack_do_feature_ref(int argc, char **argv) feature.fi_guid)) { feature.fi_can_readonly = B_TRUE; } else { - fatal("feature is not enabled: %s", feature.fi_guid); + fatal(spa, FTAG, "feature is not enabled: %s", feature.fi_guid); } if (decr && !spa_feature_is_active(spa, &feature)) - fatal("feature refcount already 0: %s", feature.fi_guid); + fatal(spa, FTAG, "feature refcount already 0: %s", + feature.fi_guid); VERIFY0(dsl_sync_task(spa_name(spa), NULL, decr ? feature_decr_sync : feature_incr_sync, &feature, 5)); @@ -530,8 +541,8 @@ main(int argc, char **argv) usage(); } - if (!g_readonly && spa_export(g_pool, NULL, B_TRUE, B_TRUE) != 0) { - fatal("pool export failed; " + if (!g_readonly && spa_export(g_pool, NULL, B_TRUE, B_FALSE) != 0) { + fatal(NULL, FTAG, "pool export failed; " "changes may not be committed to disk\n"); } diff --git a/module/zfs/dbuf.c b/module/zfs/dbuf.c index 4f17506508..c70306c9a0 100644 --- a/module/zfs/dbuf.c +++ b/module/zfs/dbuf.c @@ -1391,14 +1391,6 @@ dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx) DB_DNODE_ENTER(db); dn = DB_DNODE(db); - /* - * Note: This code will probably work even if there are concurrent - * holders, but it is untested in that scenerio, as the ZPL and - * ztest have additional locking (the range locks) that prevents - * that type of concurrent access. - */ - ASSERT3U(refcount_count(&db->db_holds), ==, db->db_dirtycnt); - dprintf_dbuf(db, "size=%llx\n", (u_longlong_t)db->db.db_size); ASSERT(db->db.db_size != 0); diff --git a/module/zfs/spa.c b/module/zfs/spa.c index 6a5d48aab4..0d0499c63c 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -3901,8 +3901,6 @@ spa_import(char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) spa_config_sync(spa, B_FALSE, B_TRUE); mutex_exit(&spa_namespace_lock); - spa_history_log_version(spa, "import"); - return (0); }