aboutsummaryrefslogtreecommitdiff
path: root/net/netlabel
diff options
context:
space:
mode:
authorPaul Moore <paul.moore@hp.com>2008-01-29 08:37:54 -0500
committerJames Morris <jmorris@namei.org>2008-01-30 08:17:17 +1100
commitb64397e0b40e75b619aeef9a1fa21f79f801a3e8 (patch)
treecea93c3a06953ceb0e8876f699ff41be6c54207d /net/netlabel
parentc783f1ce5712530ba404807c55d77ac782eb8a7d (diff)
downloadlinux-linaro-b64397e0b40e75b619aeef9a1fa21f79f801a3e8.tar.gz
NetLabel: Cleanup the LSM domain hash functions
The NetLabel/LSM domain hash table search function used an argument to specify if the default entry should be returned if an exact match couldn't be found in the hash table. This is a bit against the kernel's style so make two separate functions to represent the separate behaviors. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'net/netlabel')
-rw-r--r--net/netlabel/netlabel_domainhash.c47
1 files changed, 34 insertions, 13 deletions
diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c
index b3675bd7db3..1f8f7ace790 100644
--- a/net/netlabel/netlabel_domainhash.c
+++ b/net/netlabel/netlabel_domainhash.c
@@ -109,17 +109,14 @@ static u32 netlbl_domhsh_hash(const char *key)
/**
* netlbl_domhsh_search - Search for a domain entry
* @domain: the domain
- * @def: return default if no match is found
*
* Description:
* Searches the domain hash table and returns a pointer to the hash table
- * entry if found, otherwise NULL is returned. If @def is non-zero and a
- * match is not found in the domain hash table the default mapping is returned
- * if it exists. The caller is responsibile for the rcu hash table locks
- * (i.e. the caller much call rcu_read_[un]lock()).
+ * entry if found, otherwise NULL is returned. The caller is responsibile for
+ * the rcu hash table locks (i.e. the caller much call rcu_read_[un]lock()).
*
*/
-static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def)
+static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain)
{
u32 bkt;
struct netlbl_dom_map *iter;
@@ -133,10 +130,31 @@ static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def)
return iter;
}
- if (def != 0) {
- iter = rcu_dereference(netlbl_domhsh_def);
- if (iter != NULL && iter->valid)
- return iter;
+ return NULL;
+}
+
+/**
+ * netlbl_domhsh_search_def - Search for a domain entry
+ * @domain: the domain
+ * @def: return default if no match is found
+ *
+ * Description:
+ * Searches the domain hash table and returns a pointer to the hash table
+ * entry if an exact match is found, if an exact match is not present in the
+ * hash table then the default entry is returned if valid otherwise NULL is
+ * returned. The caller is responsibile for the rcu hash table locks
+ * (i.e. the caller much call rcu_read_[un]lock()).
+ *
+ */
+static struct netlbl_dom_map *netlbl_domhsh_search_def(const char *domain)
+{
+ struct netlbl_dom_map *entry;
+
+ entry = netlbl_domhsh_search(domain);
+ if (entry == NULL) {
+ entry = rcu_dereference(netlbl_domhsh_def);
+ if (entry != NULL && entry->valid)
+ return entry;
}
return NULL;
@@ -224,7 +242,7 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
if (entry->domain != NULL) {
bkt = netlbl_domhsh_hash(entry->domain);
spin_lock(&netlbl_domhsh_lock);
- if (netlbl_domhsh_search(entry->domain, 0) == NULL)
+ if (netlbl_domhsh_search(entry->domain) == NULL)
list_add_tail_rcu(&entry->list,
&rcu_dereference(netlbl_domhsh)->tbl[bkt]);
else
@@ -307,7 +325,10 @@ int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info)
struct audit_buffer *audit_buf;
rcu_read_lock();
- entry = netlbl_domhsh_search(domain, (domain != NULL ? 0 : 1));
+ if (domain)
+ entry = netlbl_domhsh_search(domain);
+ else
+ entry = netlbl_domhsh_search_def(domain);
if (entry == NULL)
goto remove_return;
switch (entry->type) {
@@ -377,7 +398,7 @@ int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info)
*/
struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain)
{
- return netlbl_domhsh_search(domain, 1);
+ return netlbl_domhsh_search_def(domain);
}
/**