autofs/SOURCES/autofs-5.1.7-eliminate-redundant-cache-lookup-in-tree_mapent_add_node.patch

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2021-10-06 12:12:43 +00:00
autofs-5.1.7 - eliminate redundant cache lookup in tree_mapent_add_node()
From: Ian Kent <raven@themaw.net>
Since we need to create the offset tree after adding the offset entries
to the mapent cache (from a list.h list) there's no need to lookup the
mapent in tree_mapent_add_node() and validate it. Just use it directly
when calling tree_mapent_add_node() and avoid a cache lookup on every
node addition.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
include/mounts.h | 2 +-
lib/mounts.c | 13 ++-----------
modules/parse_sun.c | 2 +-
4 files changed, 5 insertions(+), 13 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -70,6 +70,7 @@
- fix amd hosts mount expire.
- fix offset entries order.
- use mapent tree root for tree_mapent_add_node().
+- eliminate redundant cache lookup in tree_mapent_add_node().
xx/xx/2018 autofs-5.1.5
- fix flag file permission.
--- autofs-5.1.4.orig/include/mounts.h
+++ autofs-5.1.4/include/mounts.h
@@ -170,7 +170,7 @@ void mnts_get_expire_list(struct list_he
void mnts_put_expire_list(struct list_head *mnts);
void mnts_set_mounted_mount(struct autofs_point *ap, const char *name, unsigned int flags);
struct tree_node *tree_mapent_root(struct mapent *me);
-int tree_mapent_add_node(struct mapent_cache *mc, struct tree_node *root, const char *key);
+int tree_mapent_add_node(struct mapent_cache *mc, struct tree_node *root, struct mapent *me);
int tree_mapent_delete_offsets(struct mapent_cache *mc, const char *key);
void tree_mapent_cleanup_offsets(struct mapent *oe);
int tree_mapent_mount_offsets(struct mapent *oe, int nonstrict);
--- autofs-5.1.4.orig/lib/mounts.c
+++ autofs-5.1.4/lib/mounts.c
@@ -1519,19 +1519,10 @@ static void tree_mapent_free(struct tree
}
int tree_mapent_add_node(struct mapent_cache *mc,
- struct tree_node *root, const char *key)
+ struct tree_node *root, struct mapent *me)
{
- unsigned int logopt = mc->ap->logopt;
struct tree_node *n;
struct mapent *parent;
- struct mapent *me;
-
- me = cache_lookup_distinct(mc, key);
- if (!me) {
- error(logopt,
- "failed to find key %s of multi-mount", key);
- return 0;
- }
n = tree_add_node(root, me);
if (!n)
@@ -1540,7 +1531,7 @@ int tree_mapent_add_node(struct mapent_c
MAPENT_SET_ROOT(me, root)
/* Set the subtree parent */
- parent = cache_get_offset_parent(mc, key);
+ parent = cache_get_offset_parent(mc, me->key);
if (!parent)
MAPENT_SET_PARENT(me, root)
else
--- autofs-5.1.4.orig/modules/parse_sun.c
+++ autofs-5.1.4/modules/parse_sun.c
@@ -1548,7 +1548,7 @@ dont_expand:
return 1;
}
list_for_each_entry_safe(oe, tmp, &offsets, work) {
- if (!tree_mapent_add_node(mc, MAPENT_ROOT(me), oe->key))
+ if (!tree_mapent_add_node(mc, MAPENT_ROOT(me), oe))
error(ap->logopt, "failed to add offset %s to tree", oe->key);
list_del_init(&oe->work);
}