netlabel: Update kernel configuration API

Update the NetLabel kernel API to expose the new features added in kernel
releases 2.6.25 and 2.6.28: the static/fallback label functionality and network
address based selectors.

Signed-off-by: Paul Moore <paul.moore@hp.com>

1 files changed, 287 insertions, 60 deletions

diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index b32eceb3ab0d..fd9229db075c 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -31,7 +31,10 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/audit.h>
+#include <linux/in.h>
+#include <linux/in6.h>
 #include <net/ip.h>
+#include <net/ipv6.h>
 #include <net/netlabel.h>
 #include <net/cipso_ipv4.h>
 #include <asm/bug.h>
@@ -42,6 +45,7 @@
 #include "netlabel_cipso_v4.h"
 #include "netlabel_user.h"
 #include "netlabel_mgmt.h"
+#include "netlabel_addrlist.h"
 
 /*
  * Configuration Functions
@@ -50,6 +54,9 @@
 /**
  * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
  * @domain: the domain mapping to remove
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
  * @audit_info: NetLabel audit information
  *
  * Description:
@@ -58,14 +65,32 @@
  * values on failure.
  *
  */
-int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info)
+int netlbl_cfg_map_del(const char *domain,
+                       u16 family,
+                       const void *addr,
+                       const void *mask,
+                       struct netlbl_audit *audit_info)
 {
-        return netlbl_domhsh_remove(domain, audit_info);
+        if (addr == NULL && mask == NULL) {
+                return netlbl_domhsh_remove(domain, audit_info);
+        } else if (addr != NULL && mask != NULL) {
+                switch (family) {
+                case AF_INET:
+                        return netlbl_domhsh_remove_af4(domain, addr, mask,
+                                                        audit_info);
+                default:
+                        return -EPFNOSUPPORT;
+                }
+        } else
+                return -EINVAL;
 }
 
 /**
- * netlbl_cfg_unlbl_add_map - Add an unlabeled NetLabel/LSM domain mapping
+ * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
  * @domain: the domain mapping to add
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
  * @audit_info: NetLabel audit information
  *
  * Description:
@@ -74,11 +99,19 @@ int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info)
  * negative values on failure.
  *
  */
-int netlbl_cfg_unlbl_add_map(const char *domain,
+int netlbl_cfg_unlbl_map_add(const char *domain,
+                             u16 family,
+                             const void *addr,
+                             const void *mask,
                              struct netlbl_audit *audit_info)
 {
         int ret_val = -ENOMEM;
         struct netlbl_dom_map *entry;
+        struct netlbl_domaddr_map *addrmap = NULL;
+        struct netlbl_domaddr4_map *map4 = NULL;
+        struct netlbl_domaddr6_map *map6 = NULL;
+        const struct in_addr *addr4, *mask4;
+        const struct in6_addr *addr6, *mask6;
 
         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
         if (entry == NULL)
@@ -86,49 +119,225 @@ int netlbl_cfg_unlbl_add_map(const char *domain,
         if (domain != NULL) {
                 entry->domain = kstrdup(domain, GFP_ATOMIC);
                 if (entry->domain == NULL)
-                        goto cfg_unlbl_add_map_failure;
+                        goto cfg_unlbl_map_add_failure;
+        }
+
+        if (addr == NULL && mask == NULL)
+                entry->type = NETLBL_NLTYPE_UNLABELED;
+        else if (addr != NULL && mask != NULL) {
+                addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
+                if (addrmap == NULL)
+                        goto cfg_unlbl_map_add_failure;
+                INIT_LIST_HEAD(&addrmap->list4);
+                INIT_LIST_HEAD(&addrmap->list6);
+
+                switch (family) {
+                case AF_INET:
+                        addr4 = addr;
+                        mask4 = mask;
+                        map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
+                        if (map4 == NULL)
+                                goto cfg_unlbl_map_add_failure;
+                        map4->type = NETLBL_NLTYPE_UNLABELED;
+                        map4->list.addr = addr4->s_addr & mask4->s_addr;
+                        map4->list.mask = mask4->s_addr;
+                        map4->list.valid = 1;
+                        ret_val = netlbl_af4list_add(&map4->list,
+                                                     &addrmap->list4);
+                        if (ret_val != 0)
+                                goto cfg_unlbl_map_add_failure;
+                        break;
+                case AF_INET6:
+                        addr6 = addr;
+                        mask6 = mask;
+                        map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
+                        if (map4 == NULL)
+                                goto cfg_unlbl_map_add_failure;
+                        map6->type = NETLBL_NLTYPE_UNLABELED;
+                        ipv6_addr_copy(&map6->list.addr, addr6);
+                        map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
+                        map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
+                        map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
+                        map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
+                        ipv6_addr_copy(&map6->list.mask, mask6);
+                        map6->list.valid = 1;
+                        ret_val = netlbl_af4list_add(&map4->list,
+                                                     &addrmap->list4);
+                        if (ret_val != 0)
+                                goto cfg_unlbl_map_add_failure;
+                        break;
+                default:
+                        goto cfg_unlbl_map_add_failure;
+                        break;
+                }
+
+                entry->type_def.addrsel = addrmap;
+                entry->type = NETLBL_NLTYPE_ADDRSELECT;
+        } else {
+                ret_val = -EINVAL;
+                goto cfg_unlbl_map_add_failure;
         }
-        entry->type = NETLBL_NLTYPE_UNLABELED;
 
         ret_val = netlbl_domhsh_add(entry, audit_info);
         if (ret_val != 0)
-                goto cfg_unlbl_add_map_failure;
+                goto cfg_unlbl_map_add_failure;
 
         return 0;
 
-cfg_unlbl_add_map_failure:
+cfg_unlbl_map_add_failure:
         if (entry != NULL)
                 kfree(entry->domain);
         kfree(entry);
+        kfree(addrmap);
+        kfree(map4);
+        kfree(map6);
         return ret_val;
 }
 
+
+/**
+ * netlbl_cfg_unlbl_static_add - Adds a new static label
+ * @net: network namespace
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Adds a new NetLabel static label to be used when protocol provided labels
+ * are not present on incoming traffic.  If @dev_name is NULL then the default
+ * interface will be used.  Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_static_add(struct net *net,
+                                const char *dev_name,
+                                const void *addr,
+                                const void *mask,
+                                u16 family,
+                                u32 secid,
+                                struct netlbl_audit *audit_info)
+{
+        u32 addr_len;
+
+        switch (family) {
+        case AF_INET:
+                addr_len = sizeof(struct in_addr);
+                break;
+        case AF_INET6:
+                addr_len = sizeof(struct in6_addr);
+                break;
+        default:
+                return -EPFNOSUPPORT;
+        }
+
+        return netlbl_unlhsh_add(net,
+                                 dev_name, addr, mask, addr_len,
+                                 secid, audit_info);
+}
+
+/**
+ * netlbl_cfg_unlbl_static_del - Removes an existing static label
+ * @net: network namespace
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes an existing NetLabel static label used when protocol provided labels
+ * are not present on incoming traffic.  If @dev_name is NULL then the default
+ * interface will be used.  Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_static_del(struct net *net,
+                                const char *dev_name,
+                                const void *addr,
+                                const void *mask,
+                                u16 family,
+                                struct netlbl_audit *audit_info)
+{
+        u32 addr_len;
+
+        switch (family) {
+        case AF_INET:
+                addr_len = sizeof(struct in_addr);
+                break;
+        case AF_INET6:
+                addr_len = sizeof(struct in6_addr);
+                break;
+        default:
+                return -EPFNOSUPPORT;
+        }
+
+        return netlbl_unlhsh_remove(net,
+                                    dev_name, addr, mask, addr_len,
+                                    audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
+ * @doi_def: CIPSO DOI definition
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Add a new CIPSO DOI definition as defined by @doi_def.  Returns zero on
+ * success and negative values on failure.
+ *
+ */
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+                           struct netlbl_audit *audit_info)
+{
+        return cipso_v4_doi_add(doi_def, audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
+ * @doi: CIPSO DOI
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Remove an existing CIPSO DOI definition matching @doi.  Returns zero on
+ * success and negative values on failure.
+ *
+ */
+void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
+{
+        cipso_v4_doi_remove(doi, audit_info);
+}
+
 /**
- * netlbl_cfg_cipsov4_add_map - Add a new CIPSOv4 DOI definition and mapping
- * @doi_def: the DOI definition
+ * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
+ * @doi: the CIPSO DOI
  * @domain: the domain mapping to add
+ * @addr: IP address
+ * @mask: IP address mask
  * @audit_info: NetLabel audit information
  *
  * Description:
- * Add a new CIPSOv4 DOI definition and NetLabel/LSM domain mapping for this
- * new DOI definition to the NetLabel subsystem.  A @domain value of NULL adds
- * a new default domain mapping.  Returns zero on success, negative values on
- * failure.
+ * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
+ * subsystem.  A @domain value of NULL adds a new default domain mapping.
+ * Returns zero on success, negative values on failure.
  *
  */
-int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+int netlbl_cfg_cipsov4_map_add(u32 doi,
                                const char *domain,
+                               const struct in_addr *addr,
+                               const struct in_addr *mask,
                                struct netlbl_audit *audit_info)
 {
         int ret_val = -ENOMEM;
-        u32 doi;
-        u32 doi_type;
+        struct cipso_v4_doi *doi_def;
         struct netlbl_dom_map *entry;
-        const char *type_str;
-        struct audit_buffer *audit_buf;
+        struct netlbl_domaddr_map *addrmap = NULL;
+        struct netlbl_domaddr4_map *addrinfo = NULL;
 
-        doi = doi_def->doi;
-        doi_type = doi_def->type;
+        doi_def = cipso_v4_doi_getdef(doi);
+        if (doi_def == NULL)
+                return -ENOENT;
 
         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
         if (entry == NULL)
@@ -136,56 +345,52 @@ int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
         if (domain != NULL) {
                 entry->domain = kstrdup(domain, GFP_ATOMIC);
                 if (entry->domain == NULL)
-                        goto cfg_cipsov4_add_map_failure;
+                        goto cfg_cipsov4_map_add_failure;
         }
 
-        ret_val = cipso_v4_doi_add(doi_def);
-        if (ret_val != 0)
-                goto cfg_cipsov4_add_map_failure_remove_doi;
-        entry->type = NETLBL_NLTYPE_CIPSOV4;
-        entry->type_def.cipsov4 = cipso_v4_doi_getdef(doi);
-        if (entry->type_def.cipsov4 == NULL) {
-                ret_val = -ENOENT;
-                goto cfg_cipsov4_add_map_failure_remove_doi;
+        if (addr == NULL && mask == NULL) {
+                entry->type_def.cipsov4 = doi_def;
+                entry->type = NETLBL_NLTYPE_CIPSOV4;
+        } else if (addr != NULL && mask != NULL) {
+                addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
+                if (addrmap == NULL)
+                        goto cfg_cipsov4_map_add_failure;
+                INIT_LIST_HEAD(&addrmap->list4);
+                INIT_LIST_HEAD(&addrmap->list6);
+
+                addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
+                if (addrinfo == NULL)
+                        goto cfg_cipsov4_map_add_failure;
+                addrinfo->type_def.cipsov4 = doi_def;
+                addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
+                addrinfo->list.addr = addr->s_addr & mask->s_addr;
+                addrinfo->list.mask = mask->s_addr;
+                addrinfo->list.valid = 1;
+                ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
+                if (ret_val != 0)
+                        goto cfg_cipsov4_map_add_failure;
+
+                entry->type_def.addrsel = addrmap;
+                entry->type = NETLBL_NLTYPE_ADDRSELECT;
+        } else {
+                ret_val = -EINVAL;
+                goto cfg_cipsov4_map_add_failure;
         }
+
         ret_val = netlbl_domhsh_add(entry, audit_info);
         if (ret_val != 0)
-                goto cfg_cipsov4_add_map_failure_release_doi;
-
-cfg_cipsov4_add_map_return:
-        audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
-                                              audit_info);
-        if (audit_buf != NULL) {
-                switch (doi_type) {
-                case CIPSO_V4_MAP_TRANS:
-                        type_str = "trans";
-                        break;
-                case CIPSO_V4_MAP_PASS:
-                        type_str = "pass";
-                        break;
-                case CIPSO_V4_MAP_LOCAL:
-                        type_str = "local";
-                        break;
-                default:
-                        type_str = "(unknown)";
-                }
-                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);
-        }
+                goto cfg_cipsov4_map_add_failure;
 
-        return ret_val;
+        return 0;
 
-cfg_cipsov4_add_map_failure_release_doi:
+cfg_cipsov4_map_add_failure:
         cipso_v4_doi_putdef(doi_def);
-cfg_cipsov4_add_map_failure_remove_doi:
-        cipso_v4_doi_remove(doi, audit_info);
-cfg_cipsov4_add_map_failure:
         if (entry != NULL)
                 kfree(entry->domain);
         kfree(entry);
-        goto cfg_cipsov4_add_map_return;
+        kfree(addrmap);
+        kfree(addrinfo);
+        return ret_val;
 }
 
 /*
@@ -691,6 +896,28 @@ int netlbl_cache_add(const struct sk_buff *skb,
 }
 
 /*
+ * Protocol Engine Functions
+ */
+
+/**
+ * netlbl_audit_start - Start an audit message
+ * @type: audit message type
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Start an audit message using the type specified in @type and fill the audit
+ * message with some fields common to all NetLabel audit messages.  This
+ * function should only be used by protocol engines, not LSMs.  Returns a
+ * pointer to the audit buffer on success, NULL on failure.
+ *
+ */
+struct audit_buffer *netlbl_audit_start(int type,
+                                        struct netlbl_audit *audit_info)
+{
+        return netlbl_audit_start_common(type, audit_info);
+}
+
+/*
  * Setup Functions
  */