Date: Thu, 22 Feb 2018 00:42:13 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r329769 - in head: cddl/contrib/opensolaris/cmd/zdb sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201802220042.w1M0gDrc016556@repo.freebsd.org>
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Author: mav Date: Thu Feb 22 00:42:12 2018 New Revision: 329769 URL: https://svnweb.freebsd.org/changeset/base/329769 Log: MFV r329766: 8962 zdb should work on non-idle pools illumos/illumos-gate@e144c4e6c90e7d4dccaad6db660ee42b6e7ba04f Currently `zdb` consistently fails to examine non-idle pools as it fails during the `spa_load()` process. The main problem seems to be that `spa_load_verify()` fails as can be seen below: $ sudo zdb -d -G dcenter zdb: can't open 'dcenter': I/O error ZFS_DBGMSG(zdb): spa_open_common: opening dcenter spa_load(dcenter): LOADING disk vdev '/dev/dsk/c4t11d0s0': best uberblock found for spa dcenter. txg 40824950 spa_load(dcenter): using uberblock with txg=40824950 spa_load(dcenter): UNLOADING spa_load(dcenter): RELOADING spa_load(dcenter): LOADING disk vdev '/dev/dsk/c3t10d0s0': best uberblock found for spa dcenter. txg 40824952 spa_load(dcenter): using uberblock with txg=40824952 spa_load(dcenter): FAILED: spa_load_verify failed [error=5] spa_load(dcenter): UNLOADING This change makes `spa_load_verify()` a dryrun when ran from `zdb`. This is done by creating a global flag in zfs and then setting it in `zdb`. Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Andy Stormont <astormont@racktopsystems.com> Approved by: Dan McDonald <danmcd@joyent.com> Author: Pavel Zakharov <pavel.zakharov@delphix.com> Modified: head/cddl/contrib/opensolaris/cmd/zdb/zdb.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Directory Properties: head/cddl/contrib/opensolaris/ (props changed) head/cddl/contrib/opensolaris/cmd/zdb/ (props changed) head/sys/cddl/contrib/opensolaris/ (props changed) Modified: head/cddl/contrib/opensolaris/cmd/zdb/zdb.c ============================================================================== --- head/cddl/contrib/opensolaris/cmd/zdb/zdb.c Thu Feb 22 00:39:25 2018 (r329768) +++ head/cddl/contrib/opensolaris/cmd/zdb/zdb.c Thu Feb 22 00:42:12 2018 (r329769) @@ -87,11 +87,13 @@ extern int reference_tracking_enable; extern boolean_t zfs_recover; extern uint64_t zfs_arc_max, zfs_arc_meta_limit; extern int zfs_vdev_async_read_max_active; +extern boolean_t spa_load_verify_dryrun; #else int reference_tracking_enable; boolean_t zfs_recover; uint64_t zfs_arc_max, zfs_arc_meta_limit; int zfs_vdev_async_read_max_active; +boolean_t spa_load_verify_dryrun; #endif static const char cmdname[] = "zdb"; @@ -4577,6 +4579,12 @@ main(int argc, char **argv) * Disable reference tracking for better performance. */ reference_tracking_enable = B_FALSE; + + /* + * Do not fail spa_load when spa_load_verify fails. This is needed + * to load non-idle pools. + */ + spa_load_verify_dryrun = B_TRUE; kernel_init(FREAD); g_zfs = libzfs_init(); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Thu Feb 22 00:39:25 2018 (r329768) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Thu Feb 22 00:42:12 2018 (r329769) @@ -181,6 +181,12 @@ boolean_t spa_create_process = B_TRUE; /* no process = extern int zfs_sync_pass_deferred_free; /* + * Report any spa_load_verify errors found, but do not fail spa_load. + * This is used by zdb to analyze non-idle pools. + */ +boolean_t spa_load_verify_dryrun = B_FALSE; + +/* * This (illegal) pool name is used when temporarily importing a spa_t in order * to get the vdev stats associated with the imported devices. */ @@ -2088,8 +2094,15 @@ spa_load_verify(spa_t *spa) spa->spa_load_meta_errors = sle.sle_meta_count; spa->spa_load_data_errors = sle.sle_data_count; - if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && - sle.sle_data_count <= policy.zrp_maxdata) { + if (sle.sle_meta_count != 0 || sle.sle_data_count != 0) { + spa_load_note(spa, "spa_load_verify found %llu metadata errors " + "and %llu data errors", (u_longlong_t)sle.sle_meta_count, + (u_longlong_t)sle.sle_data_count); + } + + if (spa_load_verify_dryrun || + (!error && sle.sle_meta_count <= policy.zrp_maxmeta && + sle.sle_data_count <= policy.zrp_maxdata)) { int64_t loss = 0; verify_ok = B_TRUE; @@ -2106,6 +2119,9 @@ spa_load_verify(spa_t *spa) } else { spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; } + + if (spa_load_verify_dryrun) + return (0); if (error) { if (error != ENXIO && error != EIO)
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