(keyp->source_type << 9)) & \
AVTAB_HASH_MASK)
+static struct kmem_cache *avtab_node_cachep;
+
static struct avtab_node*
-avtab_insert_node(struct avtab *h, int hvalue, struct avtab_node * prev, struct avtab_node * cur,
+avtab_insert_node(struct avtab *h, int hvalue,
+ struct avtab_node * prev, struct avtab_node * cur,
struct avtab_key *key, struct avtab_datum *datum)
{
struct avtab_node * newnode;
- newnode = (struct avtab_node *) kmalloc(sizeof(struct avtab_node),GFP_KERNEL);
+ newnode = kmem_cache_alloc(avtab_node_cachep, GFP_KERNEL);
if (newnode == NULL)
return NULL;
memset(newnode, 0, sizeof(struct avtab_node));
return newnode;
}
-int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
+static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
{
int hvalue;
struct avtab_node *prev, *cur, *newnode;
+ u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if (!h)
return -EINVAL;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
- (datum->specified & cur->datum.specified))
+ (specified & cur->key.specified))
return -EEXIST;
if (key->source_type < cur->key.source_type)
break;
{
int hvalue;
struct avtab_node *prev, *cur, *newnode;
+ u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if (!h)
return NULL;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
- (datum->specified & cur->datum.specified))
+ (specified & cur->key.specified))
break;
if (key->source_type < cur->key.source_type)
break;
return newnode;
}
-struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key, int specified)
+struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key)
{
int hvalue;
struct avtab_node *cur;
+ u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if (!h)
return NULL;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
- (specified & cur->datum.specified))
+ (specified & cur->key.specified))
return &cur->datum;
if (key->source_type < cur->key.source_type)
* conjunction with avtab_search_next_node()
*/
struct avtab_node*
-avtab_search_node(struct avtab *h, struct avtab_key *key, int specified)
+avtab_search_node(struct avtab *h, struct avtab_key *key)
{
int hvalue;
struct avtab_node *cur;
+ u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if (!h)
return NULL;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
- (specified & cur->datum.specified))
+ (specified & cur->key.specified))
return cur;
if (key->source_type < cur->key.source_type)
if (!node)
return NULL;
+ specified &= ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
for (cur = node->next; cur; cur = cur->next) {
if (node->key.source_type == cur->key.source_type &&
node->key.target_type == cur->key.target_type &&
node->key.target_class == cur->key.target_class &&
- (specified & cur->datum.specified))
+ (specified & cur->key.specified))
return cur;
if (node->key.source_type < cur->key.source_type)
while (cur != NULL) {
temp = cur;
cur = cur->next;
- kfree(temp);
+ kmem_cache_free(avtab_node_cachep, temp);
}
h->htable[i] = NULL;
}
}
-int avtab_map(struct avtab *h,
- int (*apply) (struct avtab_key *k,
- struct avtab_datum *d,
- void *args),
- void *args)
-{
- int i, ret;
- struct avtab_node *cur;
-
- if (!h)
- return 0;
-
- for (i = 0; i < AVTAB_SIZE; i++) {
- cur = h->htable[i];
- while (cur != NULL) {
- ret = apply(&cur->key, &cur->datum, args);
- if (ret)
- return ret;
- cur = cur->next;
- }
- }
- return 0;
-}
-
int avtab_init(struct avtab *h)
{
int i;
max_chain_len);
}
-int avtab_read_item(void *fp, struct avtab_datum *avdatum, struct avtab_key *avkey)
+static uint16_t spec_order[] = {
+ AVTAB_ALLOWED,
+ AVTAB_AUDITDENY,
+ AVTAB_AUDITALLOW,
+ AVTAB_TRANSITION,
+ AVTAB_CHANGE,
+ AVTAB_MEMBER
+};
+
+int avtab_read_item(void *fp, u32 vers, struct avtab *a,
+ int (*insertf)(struct avtab *a, struct avtab_key *k,
+ struct avtab_datum *d, void *p),
+ void *p)
{
- __u32 *buf;
- __u32 items, items2;
+ __le16 buf16[4];
+ u16 enabled;
+ __le32 buf32[7];
+ u32 items, items2, val;
+ struct avtab_key key;
+ struct avtab_datum datum;
+ int i, rc;
+
+ memset(&key, 0, sizeof(struct avtab_key));
+ memset(&datum, 0, sizeof(struct avtab_datum));
+
+ if (vers < POLICYDB_VERSION_AVTAB) {
+ rc = next_entry(buf32, fp, sizeof(u32));
+ if (rc < 0) {
+ printk(KERN_ERR "security: avtab: truncated entry\n");
+ return -1;
+ }
+ items2 = le32_to_cpu(buf32[0]);
+ if (items2 > ARRAY_SIZE(buf32)) {
+ printk(KERN_ERR "security: avtab: entry overflow\n");
+ return -1;
- memset(avkey, 0, sizeof(struct avtab_key));
- memset(avdatum, 0, sizeof(struct avtab_datum));
+ }
+ rc = next_entry(buf32, fp, sizeof(u32)*items2);
+ if (rc < 0) {
+ printk(KERN_ERR "security: avtab: truncated entry\n");
+ return -1;
+ }
+ items = 0;
- buf = next_entry(fp, sizeof(__u32));
- if (!buf) {
- printk(KERN_ERR "security: avtab: truncated entry\n");
- goto bad;
+ val = le32_to_cpu(buf32[items++]);
+ key.source_type = (u16)val;
+ if (key.source_type != val) {
+ printk("security: avtab: truncated source type\n");
+ return -1;
+ }
+ val = le32_to_cpu(buf32[items++]);
+ key.target_type = (u16)val;
+ if (key.target_type != val) {
+ printk("security: avtab: truncated target type\n");
+ return -1;
+ }
+ val = le32_to_cpu(buf32[items++]);
+ key.target_class = (u16)val;
+ if (key.target_class != val) {
+ printk("security: avtab: truncated target class\n");
+ return -1;
+ }
+
+ val = le32_to_cpu(buf32[items++]);
+ enabled = (val & AVTAB_ENABLED_OLD) ? AVTAB_ENABLED : 0;
+
+ if (!(val & (AVTAB_AV | AVTAB_TYPE))) {
+ printk("security: avtab: null entry\n");
+ return -1;
+ }
+ if ((val & AVTAB_AV) &&
+ (val & AVTAB_TYPE)) {
+ printk("security: avtab: entry has both access vectors and types\n");
+ return -1;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(spec_order); i++) {
+ if (val & spec_order[i]) {
+ key.specified = spec_order[i] | enabled;
+ datum.data = le32_to_cpu(buf32[items++]);
+ rc = insertf(a, &key, &datum, p);
+ if (rc) return rc;
+ }
+ }
+
+ if (items != items2) {
+ printk("security: avtab: entry only had %d items, expected %d\n", items2, items);
+ return -1;
+ }
+ return 0;
}
- items2 = le32_to_cpu(buf[0]);
- buf = next_entry(fp, sizeof(__u32)*items2);
- if (!buf) {
- printk(KERN_ERR "security: avtab: truncated entry\n");
- goto bad;
+
+ rc = next_entry(buf16, fp, sizeof(u16)*4);
+ if (rc < 0) {
+ printk("security: avtab: truncated entry\n");
+ return -1;
}
+
items = 0;
- avkey->source_type = le32_to_cpu(buf[items++]);
- avkey->target_type = le32_to_cpu(buf[items++]);
- avkey->target_class = le32_to_cpu(buf[items++]);
- avdatum->specified = le32_to_cpu(buf[items++]);
- if (!(avdatum->specified & (AVTAB_AV | AVTAB_TYPE))) {
- printk(KERN_ERR "security: avtab: null entry\n");
- goto bad;
- }
- if ((avdatum->specified & AVTAB_AV) &&
- (avdatum->specified & AVTAB_TYPE)) {
- printk(KERN_ERR "security: avtab: entry has both access vectors and types\n");
- goto bad;
- }
- if (avdatum->specified & AVTAB_AV) {
- if (avdatum->specified & AVTAB_ALLOWED)
- avtab_allowed(avdatum) = le32_to_cpu(buf[items++]);
- if (avdatum->specified & AVTAB_AUDITDENY)
- avtab_auditdeny(avdatum) = le32_to_cpu(buf[items++]);
- if (avdatum->specified & AVTAB_AUDITALLOW)
- avtab_auditallow(avdatum) = le32_to_cpu(buf[items++]);
- } else {
- if (avdatum->specified & AVTAB_TRANSITION)
- avtab_transition(avdatum) = le32_to_cpu(buf[items++]);
- if (avdatum->specified & AVTAB_CHANGE)
- avtab_change(avdatum) = le32_to_cpu(buf[items++]);
- if (avdatum->specified & AVTAB_MEMBER)
- avtab_member(avdatum) = le32_to_cpu(buf[items++]);
- }
- if (items != items2) {
- printk(KERN_ERR "security: avtab: entry only had %d items, expected %d\n",
- items2, items);
- goto bad;
+ key.source_type = le16_to_cpu(buf16[items++]);
+ key.target_type = le16_to_cpu(buf16[items++]);
+ key.target_class = le16_to_cpu(buf16[items++]);
+ key.specified = le16_to_cpu(buf16[items++]);
+
+ rc = next_entry(buf32, fp, sizeof(u32));
+ if (rc < 0) {
+ printk("security: avtab: truncated entry\n");
+ return -1;
}
+ datum.data = le32_to_cpu(*buf32);
+ return insertf(a, &key, &datum, p);
+}
- return 0;
-bad:
- return -1;
+static int avtab_insertf(struct avtab *a, struct avtab_key *k,
+ struct avtab_datum *d, void *p)
+{
+ return avtab_insert(a, k, d);
}
-int avtab_read(struct avtab *a, void *fp, u32 config)
+int avtab_read(struct avtab *a, void *fp, u32 vers)
{
- int i, rc = -EINVAL;
- struct avtab_key avkey;
- struct avtab_datum avdatum;
- u32 *buf;
- u32 nel;
+ int rc;
+ __le32 buf[1];
+ u32 nel, i;
- buf = next_entry(fp, sizeof(u32));
- if (!buf) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0) {
printk(KERN_ERR "security: avtab: truncated table\n");
goto bad;
}
nel = le32_to_cpu(buf[0]);
if (!nel) {
printk(KERN_ERR "security: avtab: table is empty\n");
+ rc = -EINVAL;
goto bad;
}
for (i = 0; i < nel; i++) {
- if (avtab_read_item(fp, &avdatum, &avkey))
- goto bad;
- rc = avtab_insert(a, &avkey, &avdatum);
+ rc = avtab_read_item(fp,vers, a, avtab_insertf, NULL);
if (rc) {
if (rc == -ENOMEM)
printk(KERN_ERR "security: avtab: out of memory\n");
- if (rc == -EEXIST)
+ else if (rc == -EEXIST)
printk(KERN_ERR "security: avtab: duplicate entry\n");
+ else
+ rc = -EINVAL;
goto bad;
}
}
goto out;
}
+void avtab_cache_init(void)
+{
+ avtab_node_cachep = kmem_cache_create("avtab_node",
+ sizeof(struct avtab_node),
+ 0, SLAB_PANIC, NULL, NULL);
+}
+
+void avtab_cache_destroy(void)
+{
+ kmem_cache_destroy (avtab_node_cachep);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff