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authorDuane Griffin <duaneg@dghda.com>2008-04-28 15:40:00 +0200
committerTheodore Ts'o <tytso@mit.edu>2008-04-28 15:40:00 +0200
commit9fa27c85de57d38ca698f4e34fdd1ab06b6c8e49 (patch)
tree16210fafaf4a83b7e5796cd3ed0144e279d14019
parentext4: remove duplicate include of ext4_fs_i.h header file (diff)
downloadlinux-9fa27c85de57d38ca698f4e34fdd1ab06b6c8e49.tar.xz
linux-9fa27c85de57d38ca698f4e34fdd1ab06b6c8e49.zip
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 <duaneg@dghda.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-rw-r--r--fs/jbd2/revoke.c36
1 files 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. */