X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fnet%2Fnetlabel.h;h=e4d2d6baa98388e4d673f5f57ddc20405a3fdb69;hb=e49859e71e0318b564de1546bdc30fab738f9deb;hp=12c214b9eadf8b8d7da0f7c0eb12c08512193049;hpb=43f82216f0bd114599f4a221ae6924f3658a0c9a;p=linux-2.6-omap-h63xx.git diff --git a/include/net/netlabel.h b/include/net/netlabel.h index 12c214b9ead..e4d2d6baa98 100644 --- a/include/net/netlabel.h +++ b/include/net/netlabel.h @@ -36,6 +36,8 @@ #include #include +struct cipso_v4_doi; + /* * NetLabel - A management interface for maintaining network packet label * mapping tables for explicit packet labling protocols. @@ -67,7 +69,11 @@ * NetLabel NETLINK protocol */ -#define NETLBL_PROTO_VERSION 1 +/* NetLabel NETLINK protocol version + * 1: initial version + * 2: added static labels for unlabeled connections + */ +#define NETLBL_PROTO_VERSION 2 /* NetLabel NETLINK types/families */ #define NETLBL_NLTYPE_NONE 0 @@ -97,36 +103,116 @@ struct netlbl_audit { u32 secid; uid_t loginuid; + u32 sessionid; }; -/* Domain mapping definition struct */ -struct netlbl_dom_map; - -/* Domain mapping operations */ -int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info); +/* + * LSM security attributes + */ -/* LSM security attributes */ +/** + * struct netlbl_lsm_cache - NetLabel LSM security attribute cache + * @refcount: atomic reference counter + * @free: LSM supplied function to free the cache data + * @data: LSM supplied cache data + * + * Description: + * This structure is provided for LSMs which wish to make use of the NetLabel + * caching mechanism to store LSM specific data/attributes in the NetLabel + * cache. If the LSM has to perform a lot of translation from the NetLabel + * security attributes into it's own internal representation then the cache + * mechanism can provide a way to eliminate some or all of that translation + * overhead on a cache hit. + * + */ struct netlbl_lsm_cache { atomic_t refcount; void (*free) (const void *data); void *data; }; -struct netlbl_lsm_secattr { - char *domain; - u32 mls_lvl; - u32 mls_lvl_vld; - unsigned char *mls_cat; - size_t mls_cat_len; +/** + * struct netlbl_lsm_secattr_catmap - NetLabel LSM secattr category bitmap + * @startbit: the value of the lowest order bit in the bitmap + * @bitmap: the category bitmap + * @next: pointer to the next bitmap "node" or NULL + * + * Description: + * This structure is used to represent category bitmaps. Due to the large + * number of categories supported by most labeling protocols it is not + * practical to transfer a full bitmap internally so NetLabel adopts a sparse + * bitmap structure modeled after SELinux's ebitmap structure. + * The catmap bitmap field MUST be a power of two in length and large + * enough to hold at least 240 bits. Special care (i.e. check the code!) + * should be used when changing these values as the LSM implementation + * probably has functions which rely on the sizes of these types to speed + * processing. + * + */ +#define NETLBL_CATMAP_MAPTYPE u64 +#define NETLBL_CATMAP_MAPCNT 4 +#define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8) +#define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \ + NETLBL_CATMAP_MAPCNT) +#define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01 +struct netlbl_lsm_secattr_catmap { + u32 startbit; + NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT]; + struct netlbl_lsm_secattr_catmap *next; +}; +/** + * struct netlbl_lsm_secattr - NetLabel LSM security attributes + * @flags: indicate structure attributes, see NETLBL_SECATTR_* + * @type: indicate the NLTYPE of the attributes + * @domain: the NetLabel LSM domain + * @cache: NetLabel LSM specific cache + * @attr.mls: MLS sensitivity label + * @attr.mls.cat: MLS category bitmap + * @attr.mls.lvl: MLS sensitivity level + * @attr.secid: LSM specific secid token + * + * Description: + * This structure is used to pass security attributes between NetLabel and the + * LSM modules. The flags field is used to specify which fields within the + * struct are valid and valid values can be created by bitwise OR'ing the + * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to + * specify domain specific configuration settings and is not usually used by + * NetLabel itself when returning security attributes to the LSM. + * + */ +struct netlbl_lsm_secattr { + u32 flags; + /* bitmap values for 'flags' */ +#define NETLBL_SECATTR_NONE 0x00000000 +#define NETLBL_SECATTR_DOMAIN 0x00000001 +#define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \ + NETLBL_SECATTR_FREE_DOMAIN) +#define NETLBL_SECATTR_CACHE 0x00000002 +#define NETLBL_SECATTR_MLS_LVL 0x00000004 +#define NETLBL_SECATTR_MLS_CAT 0x00000008 +#define NETLBL_SECATTR_SECID 0x00000010 + /* bitmap meta-values for 'flags' */ +#define NETLBL_SECATTR_FREE_DOMAIN 0x01000000 +#define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \ + NETLBL_SECATTR_MLS_CAT | \ + NETLBL_SECATTR_SECID) + u32 type; + char *domain; struct netlbl_lsm_cache *cache; + union { + struct { + struct netlbl_lsm_secattr_catmap *cat; + u32 lvl; + } mls; + u32 secid; + } attr; }; /* - * LSM security attribute operations + * LSM security attribute operations (inline) */ - /** * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache * @flags: the memory allocation flags @@ -164,19 +250,52 @@ static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache) kfree(cache); } +/** + * netlbl_secattr_catmap_alloc - Allocate a LSM secattr catmap + * @flags: memory allocation flags + * + * Description: + * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL + * on failure. + * + */ +static inline struct netlbl_lsm_secattr_catmap *netlbl_secattr_catmap_alloc( + gfp_t flags) +{ + return kzalloc(sizeof(struct netlbl_lsm_secattr_catmap), flags); +} + +/** + * netlbl_secattr_catmap_free - Free a LSM secattr catmap + * @catmap: the category bitmap + * + * Description: + * Free a LSM secattr catmap. + * + */ +static inline void netlbl_secattr_catmap_free( + struct netlbl_lsm_secattr_catmap *catmap) +{ + struct netlbl_lsm_secattr_catmap *iter; + + do { + iter = catmap; + catmap = catmap->next; + kfree(iter); + } while (catmap); +} + /** * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct * @secattr: the struct to initialize * * Description: - * Initialize an already allocated netlbl_lsm_secattr struct. Returns zero on - * success, negative values on error. + * Initialize an already allocated netlbl_lsm_secattr struct. * */ -static inline int netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) +static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) { memset(secattr, 0, sizeof(*secattr)); - return 0; } /** @@ -190,10 +309,12 @@ static inline int netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) */ static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr) { - if (secattr->cache) + if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN) + kfree(secattr->domain); + if (secattr->flags & NETLBL_SECATTR_CACHE) netlbl_secattr_cache_free(secattr->cache); - kfree(secattr->domain); - kfree(secattr->mls_cat); + if (secattr->flags & NETLBL_SECATTR_MLS_CAT) + netlbl_secattr_catmap_free(secattr->attr.mls.cat); } /** @@ -205,7 +326,7 @@ static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr) * pointer on success, or NULL on failure. * */ -static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(int flags) +static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags) { return kzalloc(sizeof(struct netlbl_lsm_secattr), flags); } @@ -224,65 +345,136 @@ static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr) kfree(secattr); } +#ifdef CONFIG_NETLABEL /* - * LSM protocol operations + * LSM configuration operations */ +int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info); +int netlbl_cfg_unlbl_add_map(const char *domain, + struct netlbl_audit *audit_info); +int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, + struct netlbl_audit *audit_info); +int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def, + const char *domain, + struct netlbl_audit *audit_info); +int netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info); -#ifdef CONFIG_NETLABEL -int netlbl_socket_setattr(const struct socket *sock, - const struct netlbl_lsm_secattr *secattr); +/* + * LSM security attribute operations + */ +int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap, + u32 offset); +int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap, + u32 offset); +int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap, + u32 bit, + gfp_t flags); +int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap, + u32 start, + u32 end, + gfp_t flags); + +/* + * LSM protocol operations (NetLabel LSM/kernel API) + */ +int netlbl_enabled(void); +int netlbl_sock_setattr(struct sock *sk, + const struct netlbl_lsm_secattr *secattr); int netlbl_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr); -int netlbl_socket_getattr(const struct socket *sock, - struct netlbl_lsm_secattr *secattr); int netlbl_skbuff_getattr(const struct sk_buff *skb, + u16 family, struct netlbl_lsm_secattr *secattr); void netlbl_skbuff_err(struct sk_buff *skb, int error); + +/* + * LSM label mapping cache operations + */ +void netlbl_cache_invalidate(void); +int netlbl_cache_add(const struct sk_buff *skb, + const struct netlbl_lsm_secattr *secattr); #else -static inline int netlbl_socket_setattr(const struct socket *sock, - const struct netlbl_lsm_secattr *secattr) +static inline int netlbl_cfg_map_del(const char *domain, + struct netlbl_audit *audit_info) { return -ENOSYS; } - -static inline int netlbl_sock_getattr(struct sock *sk, - struct netlbl_lsm_secattr *secattr) +static inline int netlbl_cfg_unlbl_add_map(const char *domain, + struct netlbl_audit *audit_info) { return -ENOSYS; } - -static inline int netlbl_socket_getattr(const struct socket *sock, - struct netlbl_lsm_secattr *secattr) +static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, + struct netlbl_audit *audit_info) +{ + return -ENOSYS; +} +static inline int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def, + const char *domain, + struct netlbl_audit *audit_info) +{ + return -ENOSYS; +} +static inline int netlbl_cfg_cipsov4_del(u32 doi, + struct netlbl_audit *audit_info) +{ + return -ENOSYS; +} +static inline int netlbl_secattr_catmap_walk( + struct netlbl_lsm_secattr_catmap *catmap, + u32 offset) +{ + return -ENOENT; +} +static inline int netlbl_secattr_catmap_walk_rng( + struct netlbl_lsm_secattr_catmap *catmap, + u32 offset) +{ + return -ENOENT; +} +static inline int netlbl_secattr_catmap_setbit( + struct netlbl_lsm_secattr_catmap *catmap, + u32 bit, + gfp_t flags) +{ + return 0; +} +static inline int netlbl_secattr_catmap_setrng( + struct netlbl_lsm_secattr_catmap *catmap, + u32 start, + u32 end, + gfp_t flags) +{ + return 0; +} +static inline int netlbl_enabled(void) +{ + return 0; +} +static inline int netlbl_sock_setattr(struct sock *sk, + const struct netlbl_lsm_secattr *secattr) +{ + return -ENOSYS; +} +static inline int netlbl_sock_getattr(struct sock *sk, + struct netlbl_lsm_secattr *secattr) { return -ENOSYS; } - static inline int netlbl_skbuff_getattr(const struct sk_buff *skb, + u16 family, struct netlbl_lsm_secattr *secattr) { return -ENOSYS; } - static inline void netlbl_skbuff_err(struct sk_buff *skb, int error) { return; } -#endif /* CONFIG_NETLABEL */ - -/* - * LSM label mapping cache operations - */ - -#ifdef CONFIG_NETLABEL -void netlbl_cache_invalidate(void); -int netlbl_cache_add(const struct sk_buff *skb, - const struct netlbl_lsm_secattr *secattr); -#else static inline void netlbl_cache_invalidate(void) { return; } - static inline int netlbl_cache_add(const struct sk_buff *skb, const struct netlbl_lsm_secattr *secattr) {