autofs/SOURCES/autofs-5.1.6-make-external-mounts-use-simpler-hashtable.patch

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2021-04-16 06:10:06 +00:00
autofs-5.1.6 - make external mounts use simpler hashtable
From: Ian Kent <raven@themaw.net>
Use the added hashtable implementation for the external mounts
hashtable.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
lib/mounts.c | 49 +++++++++++++++----------------------------------
2 files changed, 16 insertions(+), 34 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -120,6 +120,7 @@ xx/xx/2018 autofs-5.1.5
- add hashtable implementation.
- change mountpoint to mp in struct ext_mount.
- make external mounts independent of amd_entry.
+- make external mounts use simpler hashtable.
19/12/2017 autofs-5.1.4
- fix spec file url.
--- autofs-5.1.4.orig/lib/mounts.c
+++ autofs-5.1.4/lib/mounts.c
@@ -29,6 +29,7 @@
#include <libgen.h>
#include "automount.h"
+#include "hashtable.h"
#define MAX_OPTIONS_LEN 80
#define MAX_MNT_NAME_LEN 30
@@ -51,16 +52,15 @@ static const char kver_options_template[
extern size_t detached_thread_stack_size;
static size_t maxgrpbuf = 0;
-#define EXT_MOUNTS_HASH_SIZE 50
+#define EXT_MOUNTS_HASH_BITS 6
struct ext_mount {
unsigned int ref;
char *mp;
char *umount;
- struct list_head mount;
+ struct hlist_node mount;
};
-static struct list_head ext_mounts_hash[EXT_MOUNTS_HASH_SIZE];
-static unsigned int ext_mounts_hash_init_done = 0;
+static DEFINE_HASHTABLE(ext_mounts_hash, EXT_MOUNTS_HASH_BITS);
static pthread_mutex_t ext_mount_hash_mutex = PTHREAD_MUTEX_INITIALIZER;
unsigned int linux_version_code(void)
@@ -734,38 +734,22 @@ char *make_mnt_name_string(char *path)
return mnt_name;
}
-static void ext_mounts_hash_init(void)
-{
- int i;
- for (i = 0; i < EXT_MOUNTS_HASH_SIZE; i++)
- INIT_LIST_HEAD(&ext_mounts_hash[i]);
- ext_mounts_hash_init_done = 1;
-}
-
static struct ext_mount *ext_mount_lookup(const char *mp)
{
- u_int32_t hval = hash(mp, EXT_MOUNTS_HASH_SIZE);
- struct list_head *p, *head;
-
- if (!ext_mounts_hash_init_done)
- ext_mounts_hash_init();
-
- if (list_empty(&ext_mounts_hash[hval]))
- return NULL;
+ uint32_t hval = hash(mp, HASH_SIZE(ext_mounts_hash));
+ struct ext_mount *this;
- head = &ext_mounts_hash[hval];
- list_for_each(p, head) {
- struct ext_mount *this = list_entry(p, struct ext_mount, mount);
+ hlist_for_each_entry(this, &ext_mounts_hash[hval], mount) {
if (!strcmp(this->mp, mp))
return this;
}
+
return NULL;
}
int ext_mount_add(const char *path, const char *umount)
{
struct ext_mount *em;
- u_int32_t hval;
int ret = 0;
pthread_mutex_lock(&ext_mount_hash_mutex);
@@ -796,10 +780,9 @@ int ext_mount_add(const char *path, cons
}
}
em->ref = 1;
- INIT_LIST_HEAD(&em->mount);
+ INIT_HLIST_NODE(&em->mount);
- hval = hash(path, EXT_MOUNTS_HASH_SIZE);
- list_add_tail(&em->mount, &ext_mounts_hash[hval]);
+ hash_add_str(ext_mounts_hash, &em->mount, em->mp);
ret = 1;
done:
@@ -822,13 +805,11 @@ int ext_mount_remove(const char *path)
if (em->ref)
goto done;
else {
- list_del_init(&em->mount);
- if (list_empty(&em->mount)) {
- free(em->mp);
- if (em->umount)
- free(em->umount);
- free(em);
- }
+ hlist_del_init(&em->mount);
+ free(em->mp);
+ if (em->umount)
+ free(em->umount);
+ free(em);
ret = 1;
}
done: