From 9fa27c85de57d38ca698f4e34fdd1ab06b6c8e49 Mon Sep 17 00:00:00 2001 From: Duane Griffin Date: Mon, 28 Apr 2008 09:40:00 -0400 Subject: [PATCH] jbd2: tidy up revoke cache initialisation and destruction Make revocation cache destruction safe to call if initialisation fails partially or entirely. This allows it to be used to cleanup in the case of initialisation failure, simplifying the code slightly. Signed-off-by: Duane Griffin Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o" Signed-off-by: Aneesh Kumar K.V --- fs/jbd2/revoke.c | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c index 2e1453a5e998..72b260896bbd 100644 --- a/fs/jbd2/revoke.c +++ b/fs/jbd2/revoke.c @@ -167,33 +167,41 @@ static struct jbd2_revoke_record_s *find_revoke_record(journal_t *journal, return NULL; } +void jbd2_journal_destroy_revoke_caches(void) +{ + if (jbd2_revoke_record_cache) { + kmem_cache_destroy(jbd2_revoke_record_cache); + jbd2_revoke_record_cache = NULL; + } + if (jbd2_revoke_table_cache) { + kmem_cache_destroy(jbd2_revoke_table_cache); + jbd2_revoke_table_cache = NULL; + } +} + int __init jbd2_journal_init_revoke_caches(void) { + J_ASSERT(!jbd2_revoke_record_cache); + J_ASSERT(!jbd2_revoke_table_cache); + jbd2_revoke_record_cache = kmem_cache_create("jbd2_revoke_record", sizeof(struct jbd2_revoke_record_s), 0, SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY, NULL); if (!jbd2_revoke_record_cache) - return -ENOMEM; + goto record_cache_failure; jbd2_revoke_table_cache = kmem_cache_create("jbd2_revoke_table", sizeof(struct jbd2_revoke_table_s), 0, SLAB_TEMPORARY, NULL); - if (!jbd2_revoke_table_cache) { - kmem_cache_destroy(jbd2_revoke_record_cache); - jbd2_revoke_record_cache = NULL; - return -ENOMEM; - } + if (!jbd2_revoke_table_cache) + goto table_cache_failure; return 0; -} - -void jbd2_journal_destroy_revoke_caches(void) -{ - kmem_cache_destroy(jbd2_revoke_record_cache); - jbd2_revoke_record_cache = NULL; - kmem_cache_destroy(jbd2_revoke_table_cache); - jbd2_revoke_table_cache = NULL; +table_cache_failure: + jbd2_journal_destroy_revoke_caches(); +record_cache_failure: + return -ENOMEM; } /* Initialise the revoke table for a given journal to a given size. */