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-rw-r--r--security/smack/smack.h5
-rw-r--r--security/smack/smack_access.c29
-rw-r--r--security/smack/smack_lsm.c12
3 files changed, 37 insertions, 9 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 339614c..e80597a 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -53,6 +53,7 @@
*/
struct smack_known {
struct list_head list;
+ struct hlist_node smk_hashed;
char *smk_known;
u32 smk_secid;
struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */
@@ -222,6 +223,7 @@ char *smk_parse_smack(const char *string, int len);
int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
char *smk_import(const char *, int);
struct smack_known *smk_import_entry(const char *, int);
+void smk_insert_entry(struct smack_known *skp);
struct smack_known *smk_find_entry(const char *);
u32 smack_to_secid(const char *);
@@ -247,6 +249,9 @@ extern struct list_head smk_netlbladdr_list;
extern struct security_operations smack_ops;
+#define SMACK_HASH_SLOTS 16
+extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
+
/*
* Is the directory transmuting?
*/
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 6a0377f..b3b59b1 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -325,6 +325,25 @@ void smack_log(char *subject_label, char *object_label, int request,
DEFINE_MUTEX(smack_known_lock);
+struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
+
+/**
+ * smk_insert_entry - insert a smack label into a hash map,
+ *
+ * this function must be called under smack_known_lock
+ */
+void smk_insert_entry(struct smack_known *skp)
+{
+ unsigned int hash;
+ struct hlist_head *head;
+
+ hash = full_name_hash(skp->smk_known, strlen(skp->smk_known));
+ head = &smack_known_hash[hash & (SMACK_HASH_SLOTS - 1)];
+
+ hlist_add_head_rcu(&skp->smk_hashed, head);
+ list_add_rcu(&skp->list, &smack_known_list);
+}
+
/**
* smk_find_entry - find a label on the list, return the list entry
* @string: a text string that might be a Smack label
@@ -334,12 +353,16 @@ DEFINE_MUTEX(smack_known_lock);
*/
struct smack_known *smk_find_entry(const char *string)
{
+ unsigned int hash;
+ struct hlist_head *head;
struct smack_known *skp;
- list_for_each_entry_rcu(skp, &smack_known_list, list) {
+ hash = full_name_hash(string, strlen(string));
+ head = &smack_known_hash[hash & (SMACK_HASH_SLOTS - 1)];
+
+ hlist_for_each_entry_rcu(skp, head, smk_hashed)
if (strcmp(skp->smk_known, string) == 0)
return skp;
- }
return NULL;
}
@@ -475,7 +498,7 @@ struct smack_known *smk_import_entry(const char *string, int len)
* Make sure that the entry is actually
* filled before putting it on the list.
*/
- list_add_rcu(&skp->list, &smack_known_list);
+ smk_insert_entry(skp);
goto unlockout;
}
/*
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 3f7682a..ce000a8 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3879,12 +3879,12 @@ static __init void init_smack_known_list(void)
/*
* Create the known labels list
*/
- list_add(&smack_known_huh.list, &smack_known_list);
- list_add(&smack_known_hat.list, &smack_known_list);
- list_add(&smack_known_star.list, &smack_known_list);
- list_add(&smack_known_floor.list, &smack_known_list);
- list_add(&smack_known_invalid.list, &smack_known_list);
- list_add(&smack_known_web.list, &smack_known_list);
+ smk_insert_entry(&smack_known_huh);
+ smk_insert_entry(&smack_known_hat);
+ smk_insert_entry(&smack_known_star);
+ smk_insert_entry(&smack_known_floor);
+ smk_insert_entry(&smack_known_invalid);
+ smk_insert_entry(&smack_known_web);
}
/**
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