autofs/SOURCES/autofs-5.1.7-remove-unused-mount-offset-list-lock-functions.patch
2021-09-09 14:55:10 +00:00

174 lines
4.7 KiB
Diff

autofs-5.1.7 - remove unused mount offset list lock functions
From: Ian Kent <raven@themaw.net>
When fixing the locking in parse_mount() it was evident that there was
no real benefit of having an additional lock for the offset list so its
use was eliminated.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1
include/automount.h | 4 --
lib/cache.c | 70 +---------------------------------------------------
3 files changed, 3 insertions(+), 72 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -18,6 +18,7 @@
- fix return from umount_subtree_mounts() on offset list delete.
- pass mapent_cache to update_offset_entry().
- fix inconsistent locking in parse_mount().
+- remove unused mount offset list lock functions.
xx/xx/2018 autofs-5.1.5
- fix flag file permission.
--- autofs-5.1.4.orig/include/automount.h
+++ autofs-5.1.4/include/automount.h
@@ -162,7 +162,6 @@ struct stack {
struct mapent {
struct mapent *next;
struct list_head ino_index;
- pthread_rwlock_t multi_rwlock;
struct list_head multi_list;
struct mapent_cache *mc;
struct map_source *source;
@@ -211,9 +210,6 @@ int cache_set_offset_parent(struct mapen
int cache_update(struct mapent_cache *mc, struct map_source *ms, const char *key, const char *mapent, time_t age);
int cache_delete(struct mapent_cache *mc, const char *key);
int cache_delete_offset(struct mapent_cache *mc, const char *key);
-void cache_multi_readlock(struct mapent *me);
-void cache_multi_writelock(struct mapent *me);
-void cache_multi_unlock(struct mapent *me);
int cache_delete_offset_list(struct mapent_cache *mc, const char *key);
void cache_release(struct map_source *map);
void cache_clean_null_cache(struct mapent_cache *mc);
--- autofs-5.1.4.orig/lib/cache.c
+++ autofs-5.1.4/lib/cache.c
@@ -108,58 +108,6 @@ void cache_lock_cleanup(void *arg)
return;
}
-void cache_multi_readlock(struct mapent *me)
-{
- int status;
-
- if (!me)
- return;
-
- status = pthread_rwlock_rdlock(&me->multi_rwlock);
- if (status) {
- logmsg("mapent cache multi mutex lock failed");
- fatal(status);
- }
- return;
-}
-
-void cache_multi_writelock(struct mapent *me)
-{
- int status;
-
- if (!me)
- return;
-
- status = pthread_rwlock_wrlock(&me->multi_rwlock);
- if (status) {
- logmsg("mapent cache multi mutex lock failed");
- fatal(status);
- }
- return;
-}
-
-void cache_multi_unlock(struct mapent *me)
-{
- int status;
-
- if (!me)
- return;
-
- status = pthread_rwlock_unlock(&me->multi_rwlock);
- if (status) {
- logmsg("mapent cache multi mutex unlock failed");
- fatal(status);
- }
- return;
-}
-
-void cache_multi_lock_cleanup(void *arg)
-{
- struct mapent *me = (struct mapent *) arg;
- cache_multi_unlock(me);
- return;
-}
-
static inline void ino_index_lock(struct mapent_cache *mc)
{
int status = pthread_mutex_lock(&mc->ino_index_mutex);
@@ -626,7 +574,6 @@ int cache_add(struct mapent_cache *mc, s
struct mapent *me, *existing = NULL;
char *pkey, *pent;
u_int32_t hashval = hash(key, mc->size);
- int status;
me = (struct mapent *) malloc(sizeof(struct mapent));
if (!me)
@@ -665,10 +612,6 @@ int cache_add(struct mapent_cache *mc, s
me->ino = (ino_t) -1;
me->flags = 0;
- status = pthread_rwlock_init(&me->multi_rwlock, NULL);
- if (status)
- fatal(status);
-
/*
* We need to add to the end if values exist in order to
* preserve the order in which the map was read on lookup.
@@ -894,7 +837,7 @@ int cache_update(struct mapent_cache *mc
return ret;
}
-/* cache_multi_lock of the multi mount owner must be held by caller */
+/* cache write lock of the multi mount owner must be held by caller */
int cache_delete_offset(struct mapent_cache *mc, const char *key)
{
u_int32_t hashval = hash(key, mc->size);
@@ -926,9 +869,6 @@ int cache_delete_offset(struct mapent_ca
return CHE_FAIL;
delete:
- status = pthread_rwlock_destroy(&me->multi_rwlock);
- if (status)
- fatal(status);
list_del(&me->multi_list);
ino_index_lock(mc);
list_del(&me->ino_index);
@@ -946,7 +886,7 @@ int cache_delete(struct mapent_cache *mc
{
struct mapent *me = NULL, *pred;
u_int32_t hashval = hash(key, mc->size);
- int status, ret = CHE_OK;
+ int ret = CHE_OK;
char this[PATH_MAX];
strcpy(this, key);
@@ -967,9 +907,6 @@ int cache_delete(struct mapent_cache *mc
goto done;
}
pred->next = me->next;
- status = pthread_rwlock_destroy(&me->multi_rwlock);
- if (status)
- fatal(status);
ino_index_lock(mc);
list_del(&me->ino_index);
ino_index_unlock(mc);
@@ -999,9 +936,6 @@ int cache_delete(struct mapent_cache *mc
goto done;
}
mc->hash[hashval] = me->next;
- status = pthread_rwlock_destroy(&me->multi_rwlock);
- if (status)
- fatal(status);
ino_index_lock(mc);
list_del(&me->ino_index);
ino_index_unlock(mc);