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autofs-5.0.9 - amd lookup add cache partial match functions
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From: Ian Kent <raven@themaw.net>
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Partial key matching is used for amd. A prefix is possibly added to the key
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and if the map entry key has a trailing /* and matches the initial part of
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the key+prefix the match succeeds.
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Update the existing partial match functions to help with this.
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---
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include/automount.h | 1 +
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lib/cache.c | 38 +++++++++++++++++++++++++++++++++-----
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2 files changed, 34 insertions(+), 5 deletions(-)
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diff --git a/include/automount.h b/include/automount.h
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index 37133fe..ac6c4e3 100644
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--- a/include/automount.h
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+++ b/include/automount.h
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@@ -215,6 +215,7 @@ struct mapent *cache_lookup(struct mapent_cache *mc, const char *key);
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struct mapent *cache_lookup_distinct(struct mapent_cache *mc, const char *key);
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struct mapent *cache_lookup_offset(const char *prefix, const char *offset, int start, struct list_head *head);
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struct mapent *cache_partial_match(struct mapent_cache *mc, const char *prefix);
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+struct mapent *cache_partial_match_wild(struct mapent_cache *mc, const char *prefix);
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int cache_add(struct mapent_cache *mc, struct map_source *ms, const char *key, const char *mapent, time_t age);
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int cache_update_offset(struct mapent_cache *mc, const char *mkey, const char *key, const char *mapent, time_t age);
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void cache_update_negative(struct mapent_cache *mc, struct map_source *ms, const char *key, time_t timeout);
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diff --git a/lib/cache.c b/lib/cache.c
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index 9af1709..8d08094 100644
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--- a/lib/cache.c
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+++ b/lib/cache.c
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@@ -566,7 +566,9 @@ struct mapent *cache_lookup_offset(const char *prefix, const char *offset, int s
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}
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/* cache must be read locked by caller */
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-struct mapent *cache_partial_match(struct mapent_cache *mc, const char *prefix)
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+static struct mapent *__cache_partial_match(struct mapent_cache *mc,
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+ const char *prefix,
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+ unsigned int type)
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{
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struct mapent *me = NULL;
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size_t len = strlen(prefix);
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@@ -578,20 +580,46 @@ struct mapent *cache_partial_match(struct mapent_cache *mc, const char *prefix)
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continue;
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if (len < strlen(me->key) &&
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- (strncmp(prefix, me->key, len) == 0) && me->key[len] == '/')
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- return me;
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+ (strncmp(prefix, me->key, len) == 0) &&
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+ me->key[len] == '/') {
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+ if (type == LKP_NORMAL)
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+ return me;
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+ if (type == LKP_WILD &&
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+ me->key[len] != '\0' &&
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+ me->key[len + 1] == '*')
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+ return me;
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+ }
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me = me->next;
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while (me != NULL) {
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if (len < strlen(me->key) &&
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- strncmp(prefix, me->key, len) == 0 && me->key[len] == '/')
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- return me;
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+ (strncmp(prefix, me->key, len) == 0 &&
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+ me->key[len] == '/')) {
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+ if (type == LKP_NORMAL)
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+ return me;
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+ if (type == LKP_WILD &&
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+ me->key[len] != '\0' &&
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+ me->key[len + 1] == '*')
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+ return me;
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+ }
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me = me->next;
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}
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}
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return NULL;
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}
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+/* cache must be read locked by caller */
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+struct mapent *cache_partial_match(struct mapent_cache *mc, const char *prefix)
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+{
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+ return __cache_partial_match(mc, prefix, LKP_NORMAL);
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+}
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+
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+/* cache must be read locked by caller */
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+struct mapent *cache_partial_match_wild(struct mapent_cache *mc, const char *prefix)
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+{
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+ return __cache_partial_match(mc, prefix, LKP_WILD);
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+}
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+
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/* cache must be write locked by caller */
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int cache_add(struct mapent_cache *mc, struct map_source *ms, const char *key, const char *mapent, time_t age)
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{
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