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-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 b3675bd7db33..1f8f7ace790e 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)
109/** 109/**
110 * netlbl_domhsh_search - Search for a domain entry 110 * netlbl_domhsh_search - Search for a domain entry
111 * @domain: the domain 111 * @domain: the domain
112 * @def: return default if no match is found
113 * 112 *
114 * Description: 113 * Description:
115 * Searches the domain hash table and returns a pointer to the hash table 114 * Searches the domain hash table and returns a pointer to the hash table
116 * entry if found, otherwise NULL is returned. If @def is non-zero and a 115 * entry if found, otherwise NULL is returned. The caller is responsibile for
117 * match is not found in the domain hash table the default mapping is returned 116 * the rcu hash table locks (i.e. the caller much call rcu_read_[un]lock()).
118 * if it exists. The caller is responsibile for the rcu hash table locks
119 * (i.e. the caller much call rcu_read_[un]lock()).
120 * 117 *
121 */ 118 */
122static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def) 119static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain)
123{ 120{
124 u32 bkt; 121 u32 bkt;
125 struct netlbl_dom_map *iter; 122 struct netlbl_dom_map *iter;
@@ -133,10 +130,31 @@ static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def)
133 return iter; 130 return iter;
134 } 131 }
135 132
136 if (def != 0) { 133 return NULL;
137 iter = rcu_dereference(netlbl_domhsh_def); 134}
138 if (iter != NULL && iter->valid) 135
139 return iter; 136/**
137 * netlbl_domhsh_search_def - Search for a domain entry
138 * @domain: the domain
139 * @def: return default if no match is found
140 *
141 * Description:
142 * Searches the domain hash table and returns a pointer to the hash table
143 * entry if an exact match is found, if an exact match is not present in the
144 * hash table then the default entry is returned if valid otherwise NULL is
145 * returned. The caller is responsibile for the rcu hash table locks
146 * (i.e. the caller much call rcu_read_[un]lock()).
147 *
148 */
149static struct netlbl_dom_map *netlbl_domhsh_search_def(const char *domain)
150{
151 struct netlbl_dom_map *entry;
152
153 entry = netlbl_domhsh_search(domain);
154 if (entry == NULL) {
155 entry = rcu_dereference(netlbl_domhsh_def);
156 if (entry != NULL && entry->valid)
157 return entry;
140 } 158 }
141 159
142 return NULL; 160 return NULL;
@@ -224,7 +242,7 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
224 if (entry->domain != NULL) { 242 if (entry->domain != NULL) {
225 bkt = netlbl_domhsh_hash(entry->domain); 243 bkt = netlbl_domhsh_hash(entry->domain);
226 spin_lock(&netlbl_domhsh_lock); 244 spin_lock(&netlbl_domhsh_lock);
227 if (netlbl_domhsh_search(entry->domain, 0) == NULL) 245 if (netlbl_domhsh_search(entry->domain) == NULL)
228 list_add_tail_rcu(&entry->list, 246 list_add_tail_rcu(&entry->list,
229 &rcu_dereference(netlbl_domhsh)->tbl[bkt]); 247 &rcu_dereference(netlbl_domhsh)->tbl[bkt]);
230 else 248 else
@@ -307,7 +325,10 @@ int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info)
307 struct audit_buffer *audit_buf; 325 struct audit_buffer *audit_buf;
308 326
309 rcu_read_lock(); 327 rcu_read_lock();
310 entry = netlbl_domhsh_search(domain, (domain != NULL ? 0 : 1)); 328 if (domain)
329 entry = netlbl_domhsh_search(domain);
330 else
331 entry = netlbl_domhsh_search_def(domain);
311 if (entry == NULL) 332 if (entry == NULL)
312 goto remove_return; 333 goto remove_return;
313 switch (entry->type) { 334 switch (entry->type) {
@@ -377,7 +398,7 @@ int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info)
377 */ 398 */
378struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain) 399struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain)
379{ 400{
380 return netlbl_domhsh_search(domain, 1); 401 return netlbl_domhsh_search_def(domain);
381} 402}
382 403
383/** 404/**