1 files changed, 114 insertions, 108 deletions

diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index fdc14a0d21a..c2f2a53a487 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -5,7 +5,7 @@
  * NetLabel system manages static and dynamic label mappings for network
  * protocols such as CIPSO and RIPSO.
  *
- * Author: Paul Moore <paul.moore@hp.com>
+ * Author: Paul Moore <paul@paul-moore.com>
  *
  */
 
@@ -23,8 +23,7 @@
  * the GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program;  if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program;  if not, see <http://www.gnu.org/licenses/>.
  *
  */
 
@@ -33,16 +32,18 @@
 #include <linux/string.h>
 #include <linux/skbuff.h>
 #include <linux/audit.h>
+#include <linux/slab.h>
 #include <net/sock.h>
 #include <net/netlink.h>
 #include <net/genetlink.h>
 #include <net/netlabel.h>
 #include <net/cipso_ipv4.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 #include "netlabel_user.h"
 #include "netlabel_cipso_v4.h"
 #include "netlabel_mgmt.h"
+#include "netlabel_domainhash.h"
 
 /* Argument struct for cipso_v4_doi_walk() */
 struct netlbl_cipsov4_doiwalk_arg {
@@ -51,6 +52,12 @@ struct netlbl_cipsov4_doiwalk_arg {
 	u32 seq;
 };
 
+/* Argument struct for netlbl_domhsh_walk() */
+struct netlbl_domhsh_walk_arg {
+	struct netlbl_audit *audit_info;
+	u32 doi;
+};
+
 /* NetLabel Generic NETLINK CIPSOv4 family */
 static struct genl_family netlbl_cipsov4_gnl_family = {
 	.id = GENL_ID_GENERATE,
@@ -81,32 +88,6 @@ static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1
  */
 
 /**
- * netlbl_cipsov4_doi_free - Frees a CIPSO V4 DOI definition
- * @entry: the entry's RCU field
- *
- * Description:
- * This function is designed to be used as a callback to the call_rcu()
- * function so that the memory allocated to the DOI definition can be released
- * safely.
- *
- */
-void netlbl_cipsov4_doi_free(struct rcu_head *entry)
-{
-	struct cipso_v4_doi *ptr;
-
-	ptr = container_of(entry, struct cipso_v4_doi, rcu);
-	switch (ptr->type) {
-	case CIPSO_V4_MAP_STD:
-		kfree(ptr->map.std->lvl.cipso);
-		kfree(ptr->map.std->lvl.local);
-		kfree(ptr->map.std->cat.cipso);
-		kfree(ptr->map.std->cat.local);
-		break;
-	}
-	kfree(ptr);
-}
-
-/**
  * netlbl_cipsov4_add_common - Parse the common sections of a ADD message
  * @info: the Generic NETLINK info block
  * @doi_def: the CIPSO V4 DOI definition
@@ -149,14 +130,16 @@ static int netlbl_cipsov4_add_common(struct genl_info *info,
 /**
  * netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
  * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
  *
  * Description:
- * Create a new CIPSO_V4_MAP_STD DOI definition based on the given ADD message
- * and add it to the CIPSO V4 engine.  Return zero on success and non-zero on
- * error.
+ * Create a new CIPSO_V4_MAP_TRANS DOI definition based on the given ADD
+ * message and add it to the CIPSO V4 engine.  Return zero on success and
+ * non-zero on error.
  *
  */
-static int netlbl_cipsov4_add_std(struct genl_info *info)
+static int netlbl_cipsov4_add_std(struct genl_info *info,
+				  struct netlbl_audit *audit_info)
 {
 	int ret_val = -EINVAL;
 	struct cipso_v4_doi *doi_def = NULL;
@@ -183,7 +166,7 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
 		ret_val = -ENOMEM;
 		goto add_std_failure;
 	}
-	doi_def->type = CIPSO_V4_MAP_STD;
+	doi_def->type = CIPSO_V4_MAP_TRANS;
 
 	ret_val = netlbl_cipsov4_add_common(info, doi_def);
 	if (ret_val != 0)
@@ -335,20 +318,21 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
 			}
 	}
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
 	if (ret_val != 0)
 		goto add_std_failure;
 	return 0;
 
 add_std_failure:
 	if (doi_def)
-		netlbl_cipsov4_doi_free(&doi_def->rcu);
+		cipso_v4_doi_free(doi_def);
 	return ret_val;
 }
 
 /**
  * netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
  * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
  *
  * Description:
  * Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
@@ -356,7 +340,8 @@ add_std_failure:
  * error.
  *
  */
-static int netlbl_cipsov4_add_pass(struct genl_info *info)
+static int netlbl_cipsov4_add_pass(struct genl_info *info,
+				   struct netlbl_audit *audit_info)
 {
 	int ret_val;
 	struct cipso_v4_doi *doi_def = NULL;
@@ -373,13 +358,52 @@ static int netlbl_cipsov4_add_pass(struct genl_info *info)
 	if (ret_val != 0)
 		goto add_pass_failure;
 
-	ret_val = cipso_v4_doi_add(doi_def);
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
 	if (ret_val != 0)
 		goto add_pass_failure;
 	return 0;
 
 add_pass_failure:
-	netlbl_cipsov4_doi_free(&doi_def->rcu);
+	cipso_v4_doi_free(doi_def);
+	return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_add_local - Adds a CIPSO V4 DOI definition
+ * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Create a new CIPSO_V4_MAP_LOCAL DOI definition based on the given ADD
+ * message and add it to the CIPSO V4 engine.  Return zero on success and
+ * non-zero on error.
+ *
+ */
+static int netlbl_cipsov4_add_local(struct genl_info *info,
+				    struct netlbl_audit *audit_info)
+{
+	int ret_val;
+	struct cipso_v4_doi *doi_def = NULL;
+
+	if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
+		return -EINVAL;
+
+	doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
+	if (doi_def == NULL)
+		return -ENOMEM;
+	doi_def->type = CIPSO_V4_MAP_LOCAL;
+
+	ret_val = netlbl_cipsov4_add_common(info, doi_def);
+	if (ret_val != 0)
+		goto add_local_failure;
+
+	ret_val = cipso_v4_doi_add(doi_def, audit_info);
+	if (ret_val != 0)
+		goto add_local_failure;
+	return 0;
+
+add_local_failure:
+	cipso_v4_doi_free(doi_def);
 	return ret_val;
 }
 
@@ -397,44 +421,27 @@ static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
 
 {
 	int ret_val = -EINVAL;
-	u32 type;
-	u32 doi;
-	const char *type_str = "(unknown)";
-	struct audit_buffer *audit_buf;
 	struct netlbl_audit audit_info;
 
 	if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
 	    !info->attrs[NLBL_CIPSOV4_A_MTYPE])
 		return -EINVAL;
 
-	doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
 	netlbl_netlink_auditinfo(skb, &audit_info);
-
-	type = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE]);
-	switch (type) {
-	case CIPSO_V4_MAP_STD:
-		type_str = "std";
-		ret_val = netlbl_cipsov4_add_std(info);
+	switch (nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE])) {
+	case CIPSO_V4_MAP_TRANS:
+		ret_val = netlbl_cipsov4_add_std(info, &audit_info);
 		break;
 	case CIPSO_V4_MAP_PASS:
-		type_str = "pass";
-		ret_val = netlbl_cipsov4_add_pass(info);
+		ret_val = netlbl_cipsov4_add_pass(info, &audit_info);
+		break;
+	case CIPSO_V4_MAP_LOCAL:
+		ret_val = netlbl_cipsov4_add_local(info, &audit_info);
 		break;
 	}
 	if (ret_val == 0)
 		atomic_inc(&netlabel_mgmt_protocount);
 
-	audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
-					      &audit_info);
-	if (audit_buf != NULL) {
-		audit_log_format(audit_buf,
-				 " cipso_doi=%u cipso_type=%s res=%u",
-				 doi,
-				 type_str,
-				 ret_val == 0 ? 1 : 0);
-		audit_log_end(audit_buf);
-	}
-
 	return ret_val;
 }
 
@@ -491,7 +498,7 @@ list_start:
 	doi_def = cipso_v4_doi_getdef(doi);
 	if (doi_def == NULL) {
 		ret_val = -EINVAL;
-		goto list_failure;
+		goto list_failure_lock;
 	}
 
 	ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type);
@@ -516,7 +523,7 @@ list_start:
 	nla_nest_end(ans_skb, nla_a);
 
 	switch (doi_def->type) {
-	case CIPSO_V4_MAP_STD:
+	case CIPSO_V4_MAP_TRANS:
 		nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVLLST);
 		if (nla_a == NULL) {
 			ret_val = -ENOMEM;
@@ -584,19 +591,14 @@ list_start:
 	rcu_read_unlock();
 
 	genlmsg_end(ans_skb, data);
-
-	ret_val = genlmsg_reply(ans_skb, info);
-	if (ret_val != 0)
-		goto list_failure;
-
-	return 0;
+	return genlmsg_reply(ans_skb, info);
 
 list_retry:
 	/* XXX - this limit is a guesstimate */
 	if (nlsze_mult < 4) {
 		rcu_read_unlock();
 		kfree_skb(ans_skb);
-		nlsze_mult++;
+		nlsze_mult *= 2;
 		goto list_start;
 	}
 list_failure_lock:
@@ -624,7 +626,7 @@ static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
 	struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg;
 	void *data;
 
-	data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
+	data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
 			   cb_arg->seq, &netlbl_cipsov4_gnl_family,
 			   NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL);
 	if (data == NULL)
@@ -660,7 +662,7 @@ static int netlbl_cipsov4_listall(struct sk_buff *skb,
 				  struct netlink_callback *cb)
 {
 	struct netlbl_cipsov4_doiwalk_arg cb_arg;
-	int doi_skip = cb->args[0];
+	u32 doi_skip = cb->args[0];
 
 	cb_arg.nl_cb = cb;
 	cb_arg.skb = skb;
@@ -673,6 +675,29 @@ static int netlbl_cipsov4_listall(struct sk_buff *skb,
 }
 
 /**
+ * netlbl_cipsov4_remove_cb - netlbl_cipsov4_remove() callback for REMOVE
+ * @entry: LSM domain mapping entry
+ * @arg: the netlbl_domhsh_walk_arg structure
+ *
+ * Description:
+ * This function is intended for use by netlbl_cipsov4_remove() as the callback
+ * for the netlbl_domhsh_walk() function; it removes LSM domain map entries
+ * which are associated with the CIPSO DOI specified in @arg.  Returns zero on
+ * success, negative values on failure.
+ *
+ */
+static int netlbl_cipsov4_remove_cb(struct netlbl_dom_map *entry, void *arg)
+{
+	struct netlbl_domhsh_walk_arg *cb_arg = arg;
+
+	if (entry->def.type == NETLBL_NLTYPE_CIPSOV4 &&
+	    entry->def.cipso->doi == cb_arg->doi)
+		return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info);
+
+	return 0;
+}
+
+/**
  * netlbl_cipsov4_remove - Handle a REMOVE message
  * @skb: the NETLINK buffer
  * @info: the Generic NETLINK info block
@@ -685,30 +710,23 @@ static int netlbl_cipsov4_listall(struct sk_buff *skb,
 static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
 {
 	int ret_val = -EINVAL;
-	u32 doi = 0;
-	struct audit_buffer *audit_buf;
+	struct netlbl_domhsh_walk_arg cb_arg;
 	struct netlbl_audit audit_info;
+	u32 skip_bkt = 0;
+	u32 skip_chain = 0;
 
 	if (!info->attrs[NLBL_CIPSOV4_A_DOI])
 		return -EINVAL;
 
-	doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
 	netlbl_netlink_auditinfo(skb, &audit_info);
-
-	ret_val = cipso_v4_doi_remove(doi,
-				      &audit_info,
-				      netlbl_cipsov4_doi_free);
-	if (ret_val == 0)
-		atomic_dec(&netlabel_mgmt_protocount);
-
-	audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_DEL,
-					      &audit_info);
-	if (audit_buf != NULL) {
-		audit_log_format(audit_buf,
-				 " cipso_doi=%u res=%u",
-				 doi,
-				 ret_val == 0 ? 1 : 0);
-		audit_log_end(audit_buf);
+	cb_arg.doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+	cb_arg.audit_info = &audit_info;
+	ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
+				     netlbl_cipsov4_remove_cb, &cb_arg);
+	if (ret_val == 0 || ret_val == -ENOENT) {
+		ret_val = cipso_v4_doi_remove(cb_arg.doi, &audit_info);
+		if (ret_val == 0)
+			atomic_dec(&netlabel_mgmt_protocount);
 	}
 
 	return ret_val;
@@ -718,7 +736,7 @@ static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
  * NetLabel Generic NETLINK Command Definitions
  */
 
-static struct genl_ops netlbl_cipsov4_ops[] = {
+static const struct genl_ops netlbl_cipsov4_ops[] = {
 	{
 	.cmd = NLBL_CIPSOV4_C_ADD,
 	.flags = GENL_ADMIN_PERM,
@@ -763,18 +781,6 @@ static struct genl_ops netlbl_cipsov4_ops[] = {
  */
 int __init netlbl_cipsov4_genl_init(void)
 {
-	int ret_val, i;
-
-	ret_val = genl_register_family(&netlbl_cipsov4_gnl_family);
-	if (ret_val != 0)
-		return ret_val;
-
-	for (i = 0; i < ARRAY_SIZE(netlbl_cipsov4_ops); i++) {
-		ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
-				&netlbl_cipsov4_ops[i]);
-		if (ret_val != 0)
-			return ret_val;
-	}
-
-	return 0;
+	return genl_register_family_with_ops(&netlbl_cipsov4_gnl_family,
+					     netlbl_cipsov4_ops);
 }