diff options
Diffstat (limited to 'net/netlabel/netlabel_kapi.c')
| -rw-r--r-- | net/netlabel/netlabel_kapi.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index c69e3e1f05c..39793a1a93a 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -30,6 +30,7 @@ #include <linux/init.h> #include <linux/types.h> +#include <linux/audit.h> #include <net/ip.h> #include <net/netlabel.h> #include <net/cipso_ipv4.h> @@ -38,10 +39,186 @@ #include "netlabel_domainhash.h" #include "netlabel_unlabeled.h" +#include "netlabel_cipso_v4.h" #include "netlabel_user.h" #include "netlabel_mgmt.h" /* + * Configuration Functions + */ + +/** + * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping + * @domain: the domain mapping to remove + * @audit_info: NetLabel audit information + * + * Description: + * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the + * default domain mapping to be removed. Returns zero on success, negative + * values on failure. + * + */ +int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info) +{ + return netlbl_domhsh_remove(domain, audit_info); +} + +/** + * netlbl_cfg_unlbl_add_map - Add an unlabeled NetLabel/LSM domain mapping + * @domain: the domain mapping to add + * @audit_info: NetLabel audit information + * + * Description: + * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL + * causes a new default domain mapping to be added. Returns zero on success, + * negative values on failure. + * + */ +int netlbl_cfg_unlbl_add_map(const char *domain, + struct netlbl_audit *audit_info) +{ + int ret_val = -ENOMEM; + struct netlbl_dom_map *entry; + + entry = kzalloc(sizeof(*entry), GFP_ATOMIC); + if (entry == NULL) + goto cfg_unlbl_add_map_failure; + if (domain != NULL) { + entry->domain = kstrdup(domain, GFP_ATOMIC); + if (entry->domain == NULL) + goto cfg_unlbl_add_map_failure; + } + entry->type = NETLBL_NLTYPE_UNLABELED; + + ret_val = netlbl_domhsh_add(entry, audit_info); + if (ret_val != 0) + goto cfg_unlbl_add_map_failure; + + return 0; + +cfg_unlbl_add_map_failure: + if (entry != NULL) + kfree(entry->domain); + kfree(entry); + return ret_val; +} + +/** + * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition + * @doi_def: the DOI definition + * @audit_info: NetLabel audit information + * + * Description: + * Add a new CIPSOv4 DOI definition to the NetLabel subsystem. Returns zero on + * success, negative values on failure. + * + */ +int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, + struct netlbl_audit *audit_info) +{ + int ret_val; + const char *type_str; + struct audit_buffer *audit_buf; + + ret_val = cipso_v4_doi_add(doi_def); + + audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD, + audit_info); + if (audit_buf != NULL) { + switch (doi_def->type) { + case CIPSO_V4_MAP_STD: + type_str = "std"; + break; + case CIPSO_V4_MAP_PASS: + type_str = "pass"; + break; + default: + type_str = "(unknown)"; + } + audit_log_format(audit_buf, + " cipso_doi=%u cipso_type=%s res=%u", + doi_def->doi, + type_str, + ret_val == 0 ? 1 : 0); + audit_log_end(audit_buf); + } + + return ret_val; +} + +/** + * netlbl_cfg_cipsov4_add_map - Add a new CIPSOv4 DOI definition and mapping + * @doi_def: the DOI definition + * @domain: the domain mapping to add + * @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. + * + */ +int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def, + const char *domain, + struct netlbl_audit *audit_info) +{ + int ret_val = -ENOMEM; + struct netlbl_dom_map *entry; + + entry = kzalloc(sizeof(*entry), GFP_ATOMIC); + if (entry == NULL) + goto cfg_cipsov4_add_map_failure; + if (domain != NULL) { + entry->domain = kstrdup(domain, GFP_ATOMIC); + if (entry->domain == NULL) + goto cfg_cipsov4_add_map_failure; + } + entry->type = NETLBL_NLTYPE_CIPSOV4; + entry->type_def.cipsov4 = doi_def; + + /* Grab a RCU read lock here so nothing happens to the doi_def variable + * between adding it to the CIPSOv4 protocol engine and adding a + * domain mapping for it. */ + + rcu_read_lock(); + ret_val = netlbl_cfg_cipsov4_add(doi_def, audit_info); + if (ret_val != 0) + goto cfg_cipsov4_add_map_failure_unlock; + ret_val = netlbl_domhsh_add(entry, audit_info); + if (ret_val != 0) + goto cfg_cipsov4_add_map_failure_remove_doi; + rcu_read_unlock(); + + return 0; + +cfg_cipsov4_add_map_failure_remove_doi: + cipso_v4_doi_remove(doi_def->doi, audit_info, netlbl_cipsov4_doi_free); +cfg_cipsov4_add_map_failure_unlock: + rcu_read_unlock(); +cfg_cipsov4_add_map_failure: + if (entry != NULL) + kfree(entry->domain); + kfree(entry); + return ret_val; +} + +/** + * netlbl_cfg_cipsov4_del - Removean existing CIPSOv4 DOI definition + * @doi: the CIPSO DOI value + * @audit_info: NetLabel audit information + * + * Description: + * Removes an existing CIPSOv4 DOI definition from the NetLabel subsystem. + * Returns zero on success, negative values on failure. + * + */ +int netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info) +{ + return cipso_v4_doi_remove(doi, audit_info, netlbl_cipsov4_doi_free); +} + +/* * Security Attribute Functions */ |