From df67f943df85a7a49f65e7d8f6903878cc5c2a5c Mon Sep 17 00:00:00 2001 From: delphij Date: Sat, 9 Feb 2013 01:41:21 +0000 Subject: [PATCH] MFC r245264: The current ZFS code expects ddt_zap_count to always succeed by asserting the underlying zap_count() to return no errors. However, it is possible that the pool reaches to such a state where zap_count would return error, leading to panics when a pool is imported. This commit changes the ddt_zap_count to return error returned from zap_count and handle the error appropriately. With this change, it's now possible to let zpool rollback damaged transaction groups and import the pool. Obtained from: ZFS on Linux github (e8fd45a0f975c6b8ae8cd644714fc21f14fac2bf) git-svn-id: svn://svn.freebsd.org/base/stable/8@246578 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f --- cddl/contrib/opensolaris/cmd/zdb/zdb.c | 4 ++- .../opensolaris/uts/common/fs/zfs/ddt.c | 26 +++++++++++++------ .../opensolaris/uts/common/fs/zfs/ddt_zap.c | 9 +++---- .../opensolaris/uts/common/fs/zfs/sys/ddt.h | 6 ++--- 4 files changed, 27 insertions(+), 18 deletions(-) diff --git a/cddl/contrib/opensolaris/cmd/zdb/zdb.c b/cddl/contrib/opensolaris/cmd/zdb/zdb.c index 362a4056e..82941af4e 100644 --- a/cddl/contrib/opensolaris/cmd/zdb/zdb.c +++ b/cddl/contrib/opensolaris/cmd/zdb/zdb.c @@ -704,7 +704,9 @@ dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class) return; ASSERT(error == 0); - if ((count = ddt_object_count(ddt, type, class)) == 0) + error = ddt_object_count(ddt, type, class, &count); + ASSERT(error == 0); + if (count == 0) return; dspace = doi.doi_physical_blocks_512 << 9; diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt.c index ef3d0f446..885af958d 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt.c @@ -89,12 +89,13 @@ ddt_object_destroy(ddt_t *ddt, enum ddt_type type, enum ddt_class class, spa_t *spa = ddt->ddt_spa; objset_t *os = ddt->ddt_os; uint64_t *objectp = &ddt->ddt_object[type][class]; + uint64_t count; char name[DDT_NAMELEN]; ddt_object_name(ddt, type, class, name); ASSERT(*objectp != 0); - ASSERT(ddt_object_count(ddt, type, class) == 0); + VERIFY(ddt_object_count(ddt, type, class, &count) == 0 && count == 0); ASSERT(ddt_histogram_empty(&ddt->ddt_histogram[type][class])); VERIFY(zap_remove(os, DMU_POOL_DIRECTORY_OBJECT, name, tx) == 0); VERIFY(zap_remove(os, spa->spa_ddt_stat_object, name, tx) == 0); @@ -109,6 +110,7 @@ ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) { ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; dmu_object_info_t doi; + uint64_t count; char name[DDT_NAMELEN]; int error; @@ -129,7 +131,11 @@ ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class) */ VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); - ddo->ddo_count = ddt_object_count(ddt, type, class); + error = ddt_object_count(ddt, type, class, &count); + if (error) + return error; + + ddo->ddo_count = count; ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; @@ -143,6 +149,7 @@ ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, { ddt_object_t *ddo = &ddt->ddt_object_stats[type][class]; dmu_object_info_t doi; + uint64_t count; char name[DDT_NAMELEN]; ddt_object_name(ddt, type, class, name); @@ -155,8 +162,9 @@ ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class, * Cache DDT statistics; this is the only time they'll change. */ VERIFY(ddt_object_info(ddt, type, class, &doi) == 0); + VERIFY(ddt_object_count(ddt, type, class, &count) == 0); - ddo->ddo_count = ddt_object_count(ddt, type, class); + ddo->ddo_count = count; ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9; ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size; } @@ -213,13 +221,13 @@ ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class, ddt->ddt_object[type][class], dde, walk)); } -uint64_t -ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class) +int +ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class, uint64_t *count) { ASSERT(ddt_object_exists(ddt, type, class)); return (ddt_ops[type]->ddt_op_count(ddt->ddt_os, - ddt->ddt_object[type][class])); + ddt->ddt_object[type][class], count)); } int @@ -1079,11 +1087,13 @@ ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg) } for (enum ddt_type type = 0; type < DDT_TYPES; type++) { - uint64_t count = 0; + uint64_t add, count = 0; for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { if (ddt_object_exists(ddt, type, class)) { ddt_object_sync(ddt, type, class, tx); - count += ddt_object_count(ddt, type, class); + VERIFY(ddt_object_count(ddt, type, class, + &add) == 0); + count += add; } } for (enum ddt_class class = 0; class < DDT_CLASSES; class++) { diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt_zap.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt_zap.c index 6812aa34c..f42b4ddaa 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt_zap.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ddt_zap.c @@ -133,14 +133,11 @@ ddt_zap_walk(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk) return (error); } -static uint64_t -ddt_zap_count(objset_t *os, uint64_t object) +static int +ddt_zap_count(objset_t *os, uint64_t object, uint64_t *count) { - uint64_t count = 0; - - VERIFY(zap_count(os, object, &count) == 0); - return (count); + return (zap_count(os, object, count)); } const ddt_ops_t ddt_zap_ops = { diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/ddt.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/ddt.h index 405622b6b..5d9747b3a 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/ddt.h +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/ddt.h @@ -163,7 +163,7 @@ typedef struct ddt_ops { dmu_tx_t *tx); int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk); - uint64_t (*ddt_op_count)(objset_t *os, uint64_t object); + int (*ddt_op_count)(objset_t *os, uint64_t object, uint64_t *count); } ddt_ops_t; #define DDT_NAMELEN 80 @@ -172,8 +172,8 @@ extern void ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class cls, char *name); extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class cls, uint64_t *walk, ddt_entry_t *dde); -extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type, - enum ddt_class cls); +extern int ddt_object_count(ddt_t *ddt, enum ddt_type type, + enum ddt_class class, uint64_t *count); extern int ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class cls, dmu_object_info_t *); extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type, -- 2.45.0