From 5819c5103634dde672e69a618f2a23bfc443929d Mon Sep 17 00:00:00 2001 From: ilovezfs Date: Thu, 28 Jan 2016 04:51:19 -0800 Subject: [PATCH] OpenZFS 6585 - sha512, skein, and edonr have an unenforced dependency on extensible dataset Authored by: ilovezfs Reviewed by: Matthew Ahrens Reviewed by: Richard Laager Approved by: Robert Mustacchi Ported by: Tony Hutter In any pool without the extensible dataset feature flag already enabled, creating a dataset with dedup set to use one of the new checksums would result in the following panic as soon as any data was added: panic[cpu0]/thread=ffffff0006761c40: feature_get_refcount(spa, feature, &refcount) != 48 (0x30 != 0x30), file: ../../common/fs/zfs/zfeature.c line 390 Inpsection showed that feature->fi_feature was 7, which is the value of SPA_FEATURE_EXTENSIBLE_DATASET in the spa_feature enum. This commit adds extensible dataset as a dependency for the sha512, edonr, and skein feature flags, which prevents the panic. OpenZFS-issue: https://www.illumos.org/issues/6585 OpenZFS-commit: https://github.com/illumos/illumos-gate/commit/892586e8a147c02d7f4053cc405229a13e796928 Porting Notes: This code was originally from Illumos, but I actually ported it from: openzfsonosx/zfs@b62a652 --- man/man5/zpool-features.5 | 6 +++--- module/zfs/zfeature_common.c | 26 +++++++++++++++++++++++--- 2 files changed, 26 insertions(+), 6 deletions(-) diff --git a/man/man5/zpool-features.5 b/man/man5/zpool-features.5 index dcfb30d18743..ffefd4129654 100644 --- a/man/man5/zpool-features.5 +++ b/man/man5/zpool-features.5 @@ -464,7 +464,7 @@ improving performance by avoiding the use of spill blocks. l l . GUID org.illumos:sha512 READ\-ONLY COMPATIBLE no -DEPENDENCIES none +DEPENDENCIES extensible_dataset .TE This feature enables the use of the SHA-512/256 truncated hash algorithm @@ -497,7 +497,7 @@ the updated GRUB stage2 module is installed). l l . GUID org.illumos:skein READ\-ONLY COMPATIBLE no -DEPENDENCIES none +DEPENDENCIES extensible_dataset .TE This feature enables the use of the Skein hash algorithm for checksum @@ -533,7 +533,7 @@ error. l l . GUID org.illumos:edonr READ\-ONLY COMPATIBLE no -DEPENDENCIES none +DEPENDENCIES extensible_dataset .TE This feature enables the use of the Edon-R hash algorithm for checksum, diff --git a/module/zfs/zfeature_common.c b/module/zfs/zfeature_common.c index e8b0a16aed86..9beb4903e5bd 100644 --- a/module/zfs/zfeature_common.c +++ b/module/zfs/zfeature_common.c @@ -253,16 +253,36 @@ zpool_feature_init(void) "Variable on-disk size of dnodes.", ZFEATURE_FLAG_PER_DATASET, large_dnode_deps); } + + { + static const spa_feature_t sha512_deps[] = { + SPA_FEATURE_EXTENSIBLE_DATASET, + SPA_FEATURE_NONE + }; zfeature_register(SPA_FEATURE_SHA512, "org.illumos:sha512", "sha512", "SHA-512/256 hash algorithm.", - ZFEATURE_FLAG_PER_DATASET, NULL); + ZFEATURE_FLAG_PER_DATASET, sha512_deps); + } + { + static const spa_feature_t skein_deps[] = { + SPA_FEATURE_EXTENSIBLE_DATASET, + SPA_FEATURE_NONE + }; zfeature_register(SPA_FEATURE_SKEIN, "org.illumos:skein", "skein", "Skein hash algorithm.", - ZFEATURE_FLAG_PER_DATASET, NULL); + ZFEATURE_FLAG_PER_DATASET, skein_deps); + } + + { + static const spa_feature_t edonr_deps[] = { + SPA_FEATURE_EXTENSIBLE_DATASET, + SPA_FEATURE_NONE + }; zfeature_register(SPA_FEATURE_EDONR, "org.illumos:edonr", "edonr", "Edon-R hash algorithm.", - ZFEATURE_FLAG_PER_DATASET, NULL); + ZFEATURE_FLAG_PER_DATASET, edonr_deps); + } }