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-rw-r--r--net/netlabel/netlabel_calipso.c734
1 files changed, 734 insertions, 0 deletions
diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c
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index 000000000..84ef4a298
--- /dev/null
+++ b/net/netlabel/netlabel_calipso.c
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NetLabel CALIPSO/IPv6 Support
+ *
+ * This file defines the CALIPSO/IPv6 functions for the NetLabel system. The
+ * NetLabel system manages static and dynamic label mappings for network
+ * protocols such as CIPSO and CALIPSO.
+ *
+ * Authors: Paul Moore <paul@paul-moore.com>
+ * Huw Davies <huw@codeweavers.com>
+ */
+
+/* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
+ */
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#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/calipso.h>
+#include <linux/atomic.h>
+
+#include "netlabel_user.h"
+#include "netlabel_calipso.h"
+#include "netlabel_mgmt.h"
+#include "netlabel_domainhash.h"
+
+/* Argument struct for calipso_doi_walk() */
+struct netlbl_calipso_doiwalk_arg {
+ struct netlink_callback *nl_cb;
+ struct sk_buff *skb;
+ u32 seq;
+};
+
+/* Argument struct for netlbl_domhsh_walk() */
+struct netlbl_domhsh_walk_arg {
+ struct netlbl_audit *audit_info;
+ u32 doi;
+};
+
+/* NetLabel Generic NETLINK CALIPSO family */
+static struct genl_family netlbl_calipso_gnl_family;
+
+/* NetLabel Netlink attribute policy */
+static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = {
+ [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 },
+ [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 },
+};
+
+static const struct netlbl_calipso_ops *calipso_ops;
+
+/**
+ * netlbl_calipso_ops_register - Register the CALIPSO operations
+ * @ops: ops to register
+ *
+ * Description:
+ * Register the CALIPSO packet engine operations.
+ *
+ */
+const struct netlbl_calipso_ops *
+netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops)
+{
+ return xchg(&calipso_ops, ops);
+}
+EXPORT_SYMBOL(netlbl_calipso_ops_register);
+
+static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void)
+{
+ return READ_ONCE(calipso_ops);
+}
+
+/* NetLabel Command Handlers
+ */
+/**
+ * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition
+ * @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message
+ * and add it to the CALIPSO engine. Return zero on success and non-zero on
+ * error.
+ *
+ */
+static int netlbl_calipso_add_pass(struct genl_info *info,
+ struct netlbl_audit *audit_info)
+{
+ int ret_val;
+ struct calipso_doi *doi_def = NULL;
+
+ doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
+ if (!doi_def)
+ return -ENOMEM;
+ doi_def->type = CALIPSO_MAP_PASS;
+ doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
+ ret_val = calipso_doi_add(doi_def, audit_info);
+ if (ret_val != 0)
+ calipso_doi_free(doi_def);
+
+ return ret_val;
+}
+
+/**
+ * netlbl_calipso_add - Handle an ADD message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Create a new DOI definition based on the given ADD message and add it to the
+ * CALIPSO engine. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ struct netlbl_audit audit_info;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (!info->attrs[NLBL_CALIPSO_A_DOI] ||
+ !info->attrs[NLBL_CALIPSO_A_MTYPE])
+ return -EINVAL;
+
+ if (!ops)
+ return -EOPNOTSUPP;
+
+ netlbl_netlink_auditinfo(&audit_info);
+ switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) {
+ case CALIPSO_MAP_PASS:
+ ret_val = netlbl_calipso_add_pass(info, &audit_info);
+ break;
+ }
+ if (ret_val == 0)
+ atomic_inc(&netlabel_mgmt_protocount);
+
+ return ret_val;
+}
+
+/**
+ * netlbl_calipso_list - Handle a LIST message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated LIST message and respond accordingly.
+ * Returns zero on success and negative values on error.
+ *
+ */
+static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val;
+ struct sk_buff *ans_skb = NULL;
+ void *data;
+ u32 doi;
+ struct calipso_doi *doi_def;
+
+ if (!info->attrs[NLBL_CALIPSO_A_DOI]) {
+ ret_val = -EINVAL;
+ goto list_failure;
+ }
+
+ doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
+
+ doi_def = calipso_doi_getdef(doi);
+ if (!doi_def) {
+ ret_val = -EINVAL;
+ goto list_failure;
+ }
+
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!ans_skb) {
+ ret_val = -ENOMEM;
+ goto list_failure_put;
+ }
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family,
+ 0, NLBL_CALIPSO_C_LIST);
+ if (!data) {
+ ret_val = -ENOMEM;
+ goto list_failure_put;
+ }
+
+ ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type);
+ if (ret_val != 0)
+ goto list_failure_put;
+
+ calipso_doi_putdef(doi_def);
+
+ genlmsg_end(ans_skb, data);
+ return genlmsg_reply(ans_skb, info);
+
+list_failure_put:
+ calipso_doi_putdef(doi_def);
+list_failure:
+ kfree_skb(ans_skb);
+ return ret_val;
+}
+
+/**
+ * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL
+ * @doi_def: the CALIPSO DOI definition
+ * @arg: the netlbl_calipso_doiwalk_arg structure
+ *
+ * Description:
+ * This function is designed to be used as a callback to the
+ * calipso_doi_walk() function for use in generating a response for a LISTALL
+ * message. Returns the size of the message on success, negative values on
+ * failure.
+ *
+ */
+static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_calipso_doiwalk_arg *cb_arg = arg;
+ void *data;
+
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
+ cb_arg->seq, &netlbl_calipso_gnl_family,
+ NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL);
+ if (!data)
+ goto listall_cb_failure;
+
+ ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+ ret_val = nla_put_u32(cb_arg->skb,
+ NLBL_CALIPSO_A_MTYPE,
+ doi_def->type);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+
+ genlmsg_end(cb_arg->skb, data);
+ return 0;
+
+listall_cb_failure:
+ genlmsg_cancel(cb_arg->skb, data);
+ return ret_val;
+}
+
+/**
+ * netlbl_calipso_listall - Handle a LISTALL message
+ * @skb: the NETLINK buffer
+ * @cb: the NETLINK callback
+ *
+ * Description:
+ * Process a user generated LISTALL message and respond accordingly. Returns
+ * zero on success and negative values on error.
+ *
+ */
+static int netlbl_calipso_listall(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct netlbl_calipso_doiwalk_arg cb_arg;
+ u32 doi_skip = cb->args[0];
+
+ cb_arg.nl_cb = cb;
+ cb_arg.skb = skb;
+ cb_arg.seq = cb->nlh->nlmsg_seq;
+
+ calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg);
+
+ cb->args[0] = doi_skip;
+ return skb->len;
+}
+
+/**
+ * netlbl_calipso_remove_cb - netlbl_calipso_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_calipso_remove() as the callback
+ * for the netlbl_domhsh_walk() function; it removes LSM domain map entries
+ * which are associated with the CALIPSO DOI specified in @arg. Returns zero on
+ * success, negative values on failure.
+ *
+ */
+static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg)
+{
+ struct netlbl_domhsh_walk_arg *cb_arg = arg;
+
+ if (entry->def.type == NETLBL_NLTYPE_CALIPSO &&
+ entry->def.calipso->doi == cb_arg->doi)
+ return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info);
+
+ return 0;
+}
+
+/**
+ * netlbl_calipso_remove - Handle a REMOVE message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated REMOVE message and respond accordingly. Returns
+ * zero on success, negative values on failure.
+ *
+ */
+static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ struct netlbl_domhsh_walk_arg cb_arg;
+ struct netlbl_audit audit_info;
+ u32 skip_bkt = 0;
+ u32 skip_chain = 0;
+
+ if (!info->attrs[NLBL_CALIPSO_A_DOI])
+ return -EINVAL;
+
+ netlbl_netlink_auditinfo(&audit_info);
+ cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]);
+ cb_arg.audit_info = &audit_info;
+ ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
+ netlbl_calipso_remove_cb, &cb_arg);
+ if (ret_val == 0 || ret_val == -ENOENT) {
+ ret_val = calipso_doi_remove(cb_arg.doi, &audit_info);
+ if (ret_val == 0)
+ atomic_dec(&netlabel_mgmt_protocount);
+ }
+
+ return ret_val;
+}
+
+/* NetLabel Generic NETLINK Command Definitions
+ */
+
+static const struct genl_small_ops netlbl_calipso_ops[] = {
+ {
+ .cmd = NLBL_CALIPSO_C_ADD,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .flags = GENL_ADMIN_PERM,
+ .doit = netlbl_calipso_add,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = NLBL_CALIPSO_C_REMOVE,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .flags = GENL_ADMIN_PERM,
+ .doit = netlbl_calipso_remove,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = NLBL_CALIPSO_C_LIST,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .flags = 0,
+ .doit = netlbl_calipso_list,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = NLBL_CALIPSO_C_LISTALL,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .flags = 0,
+ .doit = NULL,
+ .dumpit = netlbl_calipso_listall,
+ },
+};
+
+static struct genl_family netlbl_calipso_gnl_family __ro_after_init = {
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_CALIPSO_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_CALIPSO_A_MAX,
+ .policy = calipso_genl_policy,
+ .module = THIS_MODULE,
+ .small_ops = netlbl_calipso_ops,
+ .n_small_ops = ARRAY_SIZE(netlbl_calipso_ops),
+};
+
+/* NetLabel Generic NETLINK Protocol Functions
+ */
+
+/**
+ * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component
+ *
+ * Description:
+ * Register the CALIPSO packet NetLabel component with the Generic NETLINK
+ * mechanism. Returns zero on success, negative values on failure.
+ *
+ */
+int __init netlbl_calipso_genl_init(void)
+{
+ return genl_register_family(&netlbl_calipso_gnl_family);
+}
+
+/**
+ * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine
+ * @doi_def: the DOI structure
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * The caller defines a new DOI for use by the CALIPSO engine and calls this
+ * function to add it to the list of acceptable domains. The caller must
+ * ensure that the mapping table specified in @doi_def->map meets all of the
+ * requirements of the mapping type (see calipso.h for details). Returns
+ * zero on success and non-zero on failure.
+ *
+ */
+int calipso_doi_add(struct calipso_doi *doi_def,
+ struct netlbl_audit *audit_info)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->doi_add(doi_def, audit_info);
+ return ret_val;
+}
+
+/**
+ * calipso_doi_free - Frees a DOI definition
+ * @doi_def: the DOI definition
+ *
+ * Description:
+ * This function frees all of the memory associated with a DOI definition.
+ *
+ */
+void calipso_doi_free(struct calipso_doi *doi_def)
+{
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ops->doi_free(doi_def);
+}
+
+/**
+ * calipso_doi_remove - Remove an existing DOI from the CALIPSO protocol engine
+ * @doi: the DOI value
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes a DOI definition from the CALIPSO engine. The NetLabel routines will
+ * be called to release their own LSM domain mappings as well as our own
+ * domain list. Returns zero on success and negative values on failure.
+ *
+ */
+int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->doi_remove(doi, audit_info);
+ return ret_val;
+}
+
+/**
+ * calipso_doi_getdef - Returns a reference to a valid DOI definition
+ * @doi: the DOI value
+ *
+ * Description:
+ * Searches for a valid DOI definition and if one is found it is returned to
+ * the caller. Otherwise NULL is returned. The caller must ensure that
+ * calipso_doi_putdef() is called when the caller is done.
+ *
+ */
+struct calipso_doi *calipso_doi_getdef(u32 doi)
+{
+ struct calipso_doi *ret_val = NULL;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->doi_getdef(doi);
+ return ret_val;
+}
+
+/**
+ * calipso_doi_putdef - Releases a reference for the given DOI definition
+ * @doi_def: the DOI definition
+ *
+ * Description:
+ * Releases a DOI definition reference obtained from calipso_doi_getdef().
+ *
+ */
+void calipso_doi_putdef(struct calipso_doi *doi_def)
+{
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ops->doi_putdef(doi_def);
+}
+
+/**
+ * calipso_doi_walk - Iterate through the DOI definitions
+ * @skip_cnt: skip past this number of DOI definitions, updated
+ * @callback: callback for each DOI definition
+ * @cb_arg: argument for the callback function
+ *
+ * Description:
+ * Iterate over the DOI definition list, skipping the first @skip_cnt entries.
+ * For each entry call @callback, if @callback returns a negative value stop
+ * 'walking' through the list and return. Updates the value in @skip_cnt upon
+ * return. Returns zero on success, negative values on failure.
+ *
+ */
+int calipso_doi_walk(u32 *skip_cnt,
+ int (*callback)(struct calipso_doi *doi_def, void *arg),
+ void *cb_arg)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->doi_walk(skip_cnt, callback, cb_arg);
+ return ret_val;
+}
+
+/**
+ * calipso_sock_getattr - Get the security attributes from a sock
+ * @sk: the sock
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Query @sk to see if there is a CALIPSO option attached to the sock and if
+ * there is return the CALIPSO security attributes in @secattr. This function
+ * requires that @sk be locked, or privately held, but it does not do any
+ * locking itself. Returns zero on success and negative values on failure.
+ *
+ */
+int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->sock_getattr(sk, secattr);
+ return ret_val;
+}
+
+/**
+ * calipso_sock_setattr - Add a CALIPSO option to a socket
+ * @sk: the socket
+ * @doi_def: the CALIPSO DOI to use
+ * @secattr: the specific security attributes of the socket
+ *
+ * Description:
+ * Set the CALIPSO option on the given socket using the DOI definition and
+ * security attributes passed to the function. This function requires
+ * exclusive access to @sk, which means it either needs to be in the
+ * process of being created or locked. Returns zero on success and negative
+ * values on failure.
+ *
+ */
+int calipso_sock_setattr(struct sock *sk,
+ const struct calipso_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->sock_setattr(sk, doi_def, secattr);
+ return ret_val;
+}
+
+/**
+ * calipso_sock_delattr - Delete the CALIPSO option from a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Removes the CALIPSO option from a socket, if present.
+ *
+ */
+void calipso_sock_delattr(struct sock *sk)
+{
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ops->sock_delattr(sk);
+}
+
+/**
+ * calipso_req_setattr - Add a CALIPSO option to a connection request socket
+ * @req: the connection request socket
+ * @doi_def: the CALIPSO DOI to use
+ * @secattr: the specific security attributes of the socket
+ *
+ * Description:
+ * Set the CALIPSO option on the given socket using the DOI definition and
+ * security attributes passed to the function. Returns zero on success and
+ * negative values on failure.
+ *
+ */
+int calipso_req_setattr(struct request_sock *req,
+ const struct calipso_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->req_setattr(req, doi_def, secattr);
+ return ret_val;
+}
+
+/**
+ * calipso_req_delattr - Delete the CALIPSO option from a request socket
+ * @req: the request socket
+ *
+ * Description:
+ * Removes the CALIPSO option from a request socket, if present.
+ *
+ */
+void calipso_req_delattr(struct request_sock *req)
+{
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ops->req_delattr(req);
+}
+
+/**
+ * calipso_optptr - Find the CALIPSO option in the packet
+ * @skb: the packet
+ *
+ * Description:
+ * Parse the packet's IP header looking for a CALIPSO option. Returns a pointer
+ * to the start of the CALIPSO option on success, NULL if one if not found.
+ *
+ */
+unsigned char *calipso_optptr(const struct sk_buff *skb)
+{
+ unsigned char *ret_val = NULL;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->skbuff_optptr(skb);
+ return ret_val;
+}
+
+/**
+ * calipso_getattr - Get the security attributes from a memory block.
+ * @calipso: the CALIPSO option
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Inspect @calipso and return the security attributes in @secattr.
+ * Returns zero on success and negative values on failure.
+ *
+ */
+int calipso_getattr(const unsigned char *calipso,
+ struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->opt_getattr(calipso, secattr);
+ return ret_val;
+}
+
+/**
+ * calipso_skbuff_setattr - Set the CALIPSO option on a packet
+ * @skb: the packet
+ * @doi_def: the CALIPSO DOI to use
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Set the CALIPSO option on the given packet based on the security attributes.
+ * Returns a pointer to the IP header on success and NULL on failure.
+ *
+ */
+int calipso_skbuff_setattr(struct sk_buff *skb,
+ const struct calipso_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->skbuff_setattr(skb, doi_def, secattr);
+ return ret_val;
+}
+
+/**
+ * calipso_skbuff_delattr - Delete any CALIPSO options from a packet
+ * @skb: the packet
+ *
+ * Description:
+ * Removes any and all CALIPSO options from the given packet. Returns zero on
+ * success, negative values on failure.
+ *
+ */
+int calipso_skbuff_delattr(struct sk_buff *skb)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->skbuff_delattr(skb);
+ return ret_val;
+}
+
+/**
+ * calipso_cache_invalidate - Invalidates the current CALIPSO cache
+ *
+ * Description:
+ * Invalidates and frees any entries in the CALIPSO cache. Returns zero on
+ * success and negative values on failure.
+ *
+ */
+void calipso_cache_invalidate(void)
+{
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ops->cache_invalidate();
+}
+
+/**
+ * calipso_cache_add - Add an entry to the CALIPSO cache
+ * @calipso_ptr: the CALIPSO option
+ * @secattr: the packet's security attributes
+ *
+ * Description:
+ * Add a new entry into the CALIPSO label mapping cache.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+int calipso_cache_add(const unsigned char *calipso_ptr,
+ const struct netlbl_lsm_secattr *secattr)
+
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->cache_add(calipso_ptr, secattr);
+ return ret_val;
+}