diff options
Diffstat (limited to 'security/selinux/ss/services.c')
| -rw-r--r-- | security/selinux/ss/services.c | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 8dfaa3e7c26d..8ee04a424df7 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -16,12 +16,13 @@ * Updated: Hewlett-Packard <paul.moore@hp.com> * * Added support for NetLabel + * Added support for the policy capability bitmap * * Updated: Chad Sellers <csellers@tresys.com> * * Added validation of kernel classes and permissions * - * Copyright (C) 2006 Hewlett-Packard Development Company, L.P. + * Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P. * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc. * Copyright (C) 2003 - 2004, 2006 Tresys Technology, LLC * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com> @@ -59,6 +60,8 @@ extern void selnl_notify_policyload(u32 seqno); unsigned int policydb_loaded_version; +int selinux_policycap_netpeer; + /* * This is declared in avc.c */ @@ -1299,6 +1302,12 @@ bad: goto out; } +static void security_load_policycaps(void) +{ + selinux_policycap_netpeer = ebitmap_get_bit(&policydb.policycaps, + POLICYDB_CAPABILITY_NETPEER); +} + extern void selinux_complete_init(void); static int security_preserve_bools(struct policydb *p); @@ -1346,6 +1355,7 @@ int security_load_policy(void *data, size_t len) avtab_cache_destroy(); return -EINVAL; } + security_load_policycaps(); policydb_loaded_version = policydb.policyvers; ss_initialized = 1; seqno = ++latest_granting; @@ -1404,6 +1414,7 @@ int security_load_policy(void *data, size_t len) POLICY_WRLOCK; memcpy(&policydb, &newpolicydb, sizeof policydb); sidtab_set(&sidtab, &newsidtab); + security_load_policycaps(); seqno = ++latest_granting; policydb_loaded_version = policydb.policyvers; POLICY_WRUNLOCK; @@ -2148,6 +2159,60 @@ int security_get_allow_unknown(void) return policydb.allow_unknown; } +/** + * security_get_policycaps - Query the loaded policy for its capabilities + * @len: the number of capability bits + * @values: the capability bit array + * + * Description: + * Get an array of the policy capabilities in @values where each entry in + * @values is either true (1) or false (0) depending the policy's support of + * that feature. The policy capabilities are defined by the + * POLICYDB_CAPABILITY_* enums. The size of the array is stored in @len and it + * is up to the caller to free the array in @values. Returns zero on success, + * negative values on failure. + * + */ +int security_get_policycaps(int *len, int **values) +{ + int rc = -ENOMEM; + unsigned int iter; + + POLICY_RDLOCK; + + *values = kcalloc(POLICYDB_CAPABILITY_MAX, sizeof(int), GFP_ATOMIC); + if (*values == NULL) + goto out; + for (iter = 0; iter < POLICYDB_CAPABILITY_MAX; iter++) + (*values)[iter] = ebitmap_get_bit(&policydb.policycaps, iter); + *len = POLICYDB_CAPABILITY_MAX; + +out: + POLICY_RDUNLOCK; + return rc; +} + +/** + * security_policycap_supported - Check for a specific policy capability + * @req_cap: capability + * + * Description: + * This function queries the currently loaded policy to see if it supports the + * capability specified by @req_cap. Returns true (1) if the capability is + * supported, false (0) if it isn't supported. + * + */ +int security_policycap_supported(unsigned int req_cap) +{ + int rc; + + POLICY_RDLOCK; + rc = ebitmap_get_bit(&policydb.policycaps, req_cap); + POLICY_RDUNLOCK; + + return rc; +} + struct selinux_audit_rule { u32 au_seqno; struct context au_ctxt; |