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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Jakub Kicinski](/assets/img/avatar_default.png)
Bulk of the genetlink users can use smaller ops, move them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
784 lines
21 KiB
C
784 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* NetLabel CIPSO/IPv4 Support
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*
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* This file defines the CIPSO/IPv4 functions for the NetLabel system. The
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* NetLabel system manages static and dynamic label mappings for network
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* protocols such as CIPSO and RIPSO.
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*
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* Author: Paul Moore <paul@paul-moore.com>
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*/
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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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*/
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/string.h>
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#include <linux/skbuff.h>
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#include <linux/audit.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include <net/netlabel.h>
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#include <net/cipso_ipv4.h>
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#include <linux/atomic.h>
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#include "netlabel_user.h"
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#include "netlabel_cipso_v4.h"
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#include "netlabel_mgmt.h"
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#include "netlabel_domainhash.h"
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/* Argument struct for cipso_v4_doi_walk() */
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struct netlbl_cipsov4_doiwalk_arg {
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struct netlink_callback *nl_cb;
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struct sk_buff *skb;
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u32 seq;
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};
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/* Argument struct for netlbl_domhsh_walk() */
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struct netlbl_domhsh_walk_arg {
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struct netlbl_audit *audit_info;
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u32 doi;
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};
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/* NetLabel Generic NETLINK CIPSOv4 family */
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static struct genl_family netlbl_cipsov4_gnl_family;
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/* NetLabel Netlink attribute policy */
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static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = {
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[NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_MTYPE] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_TAG] = { .type = NLA_U8 },
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[NLBL_CIPSOV4_A_TAGLST] = { .type = NLA_NESTED },
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[NLBL_CIPSOV4_A_MLSLVLLOC] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_MLSLVLREM] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_MLSLVL] = { .type = NLA_NESTED },
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[NLBL_CIPSOV4_A_MLSLVLLST] = { .type = NLA_NESTED },
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[NLBL_CIPSOV4_A_MLSCATLOC] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_MLSCATREM] = { .type = NLA_U32 },
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[NLBL_CIPSOV4_A_MLSCAT] = { .type = NLA_NESTED },
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[NLBL_CIPSOV4_A_MLSCATLST] = { .type = NLA_NESTED },
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};
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/*
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* Helper Functions
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*/
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/**
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* netlbl_cipsov4_add_common - Parse the common sections of a ADD message
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* @info: the Generic NETLINK info block
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* @doi_def: the CIPSO V4 DOI definition
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*
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* Description:
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* Parse the common sections of a ADD message and fill in the related values
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* in @doi_def. Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_cipsov4_add_common(struct genl_info *info,
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struct cipso_v4_doi *doi_def)
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{
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struct nlattr *nla;
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int nla_rem;
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u32 iter = 0;
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doi_def->doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
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if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_TAGLST],
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NLBL_CIPSOV4_A_MAX,
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netlbl_cipsov4_genl_policy,
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NULL) != 0)
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return -EINVAL;
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nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
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if (nla_type(nla) == NLBL_CIPSOV4_A_TAG) {
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if (iter >= CIPSO_V4_TAG_MAXCNT)
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return -EINVAL;
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doi_def->tags[iter++] = nla_get_u8(nla);
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}
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while (iter < CIPSO_V4_TAG_MAXCNT)
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doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID;
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return 0;
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}
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/*
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* NetLabel Command Handlers
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*/
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/**
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* netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
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* @info: the Generic NETLINK info block
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* @audit_info: NetLabel audit information
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*
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* Description:
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* Create a new CIPSO_V4_MAP_TRANS DOI definition based on the given ADD
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* message and add it to the CIPSO V4 engine. Return zero on success and
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* non-zero on error.
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*
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*/
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static int netlbl_cipsov4_add_std(struct genl_info *info,
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struct netlbl_audit *audit_info)
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{
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int ret_val = -EINVAL;
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struct cipso_v4_doi *doi_def = NULL;
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struct nlattr *nla_a;
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struct nlattr *nla_b;
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int nla_a_rem;
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int nla_b_rem;
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u32 iter;
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if (!info->attrs[NLBL_CIPSOV4_A_TAGLST] ||
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!info->attrs[NLBL_CIPSOV4_A_MLSLVLLST])
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return -EINVAL;
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if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
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NLBL_CIPSOV4_A_MAX,
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netlbl_cipsov4_genl_policy,
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NULL) != 0)
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return -EINVAL;
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doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
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if (doi_def == NULL)
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return -ENOMEM;
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doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL);
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if (doi_def->map.std == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->type = CIPSO_V4_MAP_TRANS;
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ret_val = netlbl_cipsov4_add_common(info, doi_def);
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if (ret_val != 0)
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goto add_std_failure;
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ret_val = -EINVAL;
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nla_for_each_nested(nla_a,
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info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
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nla_a_rem)
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if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) {
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if (nla_validate_nested_deprecated(nla_a,
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NLBL_CIPSOV4_A_MAX,
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netlbl_cipsov4_genl_policy,
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NULL) != 0)
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goto add_std_failure;
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nla_for_each_nested(nla_b, nla_a, nla_b_rem)
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switch (nla_type(nla_b)) {
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case NLBL_CIPSOV4_A_MLSLVLLOC:
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if (nla_get_u32(nla_b) >
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CIPSO_V4_MAX_LOC_LVLS)
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goto add_std_failure;
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if (nla_get_u32(nla_b) >=
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doi_def->map.std->lvl.local_size)
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doi_def->map.std->lvl.local_size =
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nla_get_u32(nla_b) + 1;
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break;
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case NLBL_CIPSOV4_A_MLSLVLREM:
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if (nla_get_u32(nla_b) >
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CIPSO_V4_MAX_REM_LVLS)
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goto add_std_failure;
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if (nla_get_u32(nla_b) >=
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doi_def->map.std->lvl.cipso_size)
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doi_def->map.std->lvl.cipso_size =
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nla_get_u32(nla_b) + 1;
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break;
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}
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}
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doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->lvl.local == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->lvl.cipso == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
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doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
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for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
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doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
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nla_for_each_nested(nla_a,
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info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
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nla_a_rem)
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if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) {
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struct nlattr *lvl_loc;
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struct nlattr *lvl_rem;
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lvl_loc = nla_find_nested(nla_a,
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NLBL_CIPSOV4_A_MLSLVLLOC);
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lvl_rem = nla_find_nested(nla_a,
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NLBL_CIPSOV4_A_MLSLVLREM);
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if (lvl_loc == NULL || lvl_rem == NULL)
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goto add_std_failure;
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doi_def->map.std->lvl.local[nla_get_u32(lvl_loc)] =
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nla_get_u32(lvl_rem);
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doi_def->map.std->lvl.cipso[nla_get_u32(lvl_rem)] =
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nla_get_u32(lvl_loc);
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}
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if (info->attrs[NLBL_CIPSOV4_A_MLSCATLST]) {
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if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
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NLBL_CIPSOV4_A_MAX,
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netlbl_cipsov4_genl_policy,
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NULL) != 0)
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goto add_std_failure;
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nla_for_each_nested(nla_a,
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info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
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nla_a_rem)
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if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) {
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if (nla_validate_nested_deprecated(nla_a,
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NLBL_CIPSOV4_A_MAX,
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netlbl_cipsov4_genl_policy,
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NULL) != 0)
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goto add_std_failure;
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nla_for_each_nested(nla_b, nla_a, nla_b_rem)
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switch (nla_type(nla_b)) {
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case NLBL_CIPSOV4_A_MLSCATLOC:
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if (nla_get_u32(nla_b) >
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CIPSO_V4_MAX_LOC_CATS)
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goto add_std_failure;
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if (nla_get_u32(nla_b) >=
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doi_def->map.std->cat.local_size)
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doi_def->map.std->cat.local_size =
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nla_get_u32(nla_b) + 1;
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break;
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case NLBL_CIPSOV4_A_MLSCATREM:
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if (nla_get_u32(nla_b) >
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CIPSO_V4_MAX_REM_CATS)
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goto add_std_failure;
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if (nla_get_u32(nla_b) >=
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doi_def->map.std->cat.cipso_size)
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doi_def->map.std->cat.cipso_size =
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nla_get_u32(nla_b) + 1;
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break;
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}
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}
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doi_def->map.std->cat.local = kcalloc(
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doi_def->map.std->cat.local_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->cat.local == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->map.std->cat.cipso = kcalloc(
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doi_def->map.std->cat.cipso_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->cat.cipso == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
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doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
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for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
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doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
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nla_for_each_nested(nla_a,
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info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
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nla_a_rem)
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if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) {
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struct nlattr *cat_loc;
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struct nlattr *cat_rem;
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cat_loc = nla_find_nested(nla_a,
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NLBL_CIPSOV4_A_MLSCATLOC);
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cat_rem = nla_find_nested(nla_a,
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NLBL_CIPSOV4_A_MLSCATREM);
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if (cat_loc == NULL || cat_rem == NULL)
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goto add_std_failure;
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doi_def->map.std->cat.local[
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nla_get_u32(cat_loc)] =
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nla_get_u32(cat_rem);
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doi_def->map.std->cat.cipso[
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nla_get_u32(cat_rem)] =
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nla_get_u32(cat_loc);
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}
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}
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ret_val = cipso_v4_doi_add(doi_def, audit_info);
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if (ret_val != 0)
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goto add_std_failure;
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return 0;
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add_std_failure:
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cipso_v4_doi_free(doi_def);
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return ret_val;
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}
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/**
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* netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
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* @info: the Generic NETLINK info block
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* @audit_info: NetLabel audit information
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*
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|
* Description:
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* Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
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* and add it to the CIPSO V4 engine. Return zero on success and non-zero on
|
|
* error.
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*
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*/
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static int netlbl_cipsov4_add_pass(struct genl_info *info,
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struct netlbl_audit *audit_info)
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{
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int ret_val;
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struct cipso_v4_doi *doi_def = NULL;
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|
|
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if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
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return -EINVAL;
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|
|
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doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
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if (doi_def == NULL)
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return -ENOMEM;
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doi_def->type = CIPSO_V4_MAP_PASS;
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|
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ret_val = netlbl_cipsov4_add_common(info, doi_def);
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if (ret_val != 0)
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|
goto add_pass_failure;
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|
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ret_val = cipso_v4_doi_add(doi_def, audit_info);
|
|
if (ret_val != 0)
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goto add_pass_failure;
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|
return 0;
|
|
|
|
add_pass_failure:
|
|
cipso_v4_doi_free(doi_def);
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|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_add_local - Adds a CIPSO V4 DOI definition
|
|
* @info: the Generic NETLINK info block
|
|
* @audit_info: NetLabel audit information
|
|
*
|
|
* Description:
|
|
* Create a new CIPSO_V4_MAP_LOCAL DOI definition based on the given ADD
|
|
* message and add it to the CIPSO V4 engine. Return zero on success and
|
|
* non-zero on error.
|
|
*
|
|
*/
|
|
static int netlbl_cipsov4_add_local(struct genl_info *info,
|
|
struct netlbl_audit *audit_info)
|
|
{
|
|
int ret_val;
|
|
struct cipso_v4_doi *doi_def = NULL;
|
|
|
|
if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
|
|
return -EINVAL;
|
|
|
|
doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
|
|
if (doi_def == NULL)
|
|
return -ENOMEM;
|
|
doi_def->type = CIPSO_V4_MAP_LOCAL;
|
|
|
|
ret_val = netlbl_cipsov4_add_common(info, doi_def);
|
|
if (ret_val != 0)
|
|
goto add_local_failure;
|
|
|
|
ret_val = cipso_v4_doi_add(doi_def, audit_info);
|
|
if (ret_val != 0)
|
|
goto add_local_failure;
|
|
return 0;
|
|
|
|
add_local_failure:
|
|
cipso_v4_doi_free(doi_def);
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_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
|
|
* CIPSO V4 engine. Returns zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
int ret_val = -EINVAL;
|
|
struct netlbl_audit audit_info;
|
|
|
|
if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
|
|
!info->attrs[NLBL_CIPSOV4_A_MTYPE])
|
|
return -EINVAL;
|
|
|
|
netlbl_netlink_auditinfo(skb, &audit_info);
|
|
switch (nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE])) {
|
|
case CIPSO_V4_MAP_TRANS:
|
|
ret_val = netlbl_cipsov4_add_std(info, &audit_info);
|
|
break;
|
|
case CIPSO_V4_MAP_PASS:
|
|
ret_val = netlbl_cipsov4_add_pass(info, &audit_info);
|
|
break;
|
|
case CIPSO_V4_MAP_LOCAL:
|
|
ret_val = netlbl_cipsov4_add_local(info, &audit_info);
|
|
break;
|
|
}
|
|
if (ret_val == 0)
|
|
atomic_inc(&netlabel_mgmt_protocount);
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_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. While the
|
|
* response message generated by the kernel is straightforward, determining
|
|
* before hand the size of the buffer to allocate is not (we have to generate
|
|
* the message to know the size). In order to keep this function sane what we
|
|
* do is allocate a buffer of NLMSG_GOODSIZE and try to fit the response in
|
|
* that size, if we fail then we restart with a larger buffer and try again.
|
|
* We continue in this manner until we hit a limit of failed attempts then we
|
|
* give up and just send an error message. Returns zero on success and
|
|
* negative values on error.
|
|
*
|
|
*/
|
|
static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int ret_val;
|
|
struct sk_buff *ans_skb = NULL;
|
|
u32 nlsze_mult = 1;
|
|
void *data;
|
|
u32 doi;
|
|
struct nlattr *nla_a;
|
|
struct nlattr *nla_b;
|
|
struct cipso_v4_doi *doi_def;
|
|
u32 iter;
|
|
|
|
if (!info->attrs[NLBL_CIPSOV4_A_DOI]) {
|
|
ret_val = -EINVAL;
|
|
goto list_failure;
|
|
}
|
|
|
|
list_start:
|
|
ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE * nlsze_mult, GFP_KERNEL);
|
|
if (ans_skb == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_failure;
|
|
}
|
|
data = genlmsg_put_reply(ans_skb, info, &netlbl_cipsov4_gnl_family,
|
|
0, NLBL_CIPSOV4_C_LIST);
|
|
if (data == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_failure;
|
|
}
|
|
|
|
doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
|
|
|
|
rcu_read_lock();
|
|
doi_def = cipso_v4_doi_getdef(doi);
|
|
if (doi_def == NULL) {
|
|
ret_val = -EINVAL;
|
|
goto list_failure_lock;
|
|
}
|
|
|
|
ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type);
|
|
if (ret_val != 0)
|
|
goto list_failure_lock;
|
|
|
|
nla_a = nla_nest_start_noflag(ans_skb, NLBL_CIPSOV4_A_TAGLST);
|
|
if (nla_a == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_failure_lock;
|
|
}
|
|
for (iter = 0;
|
|
iter < CIPSO_V4_TAG_MAXCNT &&
|
|
doi_def->tags[iter] != CIPSO_V4_TAG_INVALID;
|
|
iter++) {
|
|
ret_val = nla_put_u8(ans_skb,
|
|
NLBL_CIPSOV4_A_TAG,
|
|
doi_def->tags[iter]);
|
|
if (ret_val != 0)
|
|
goto list_failure_lock;
|
|
}
|
|
nla_nest_end(ans_skb, nla_a);
|
|
|
|
switch (doi_def->type) {
|
|
case CIPSO_V4_MAP_TRANS:
|
|
nla_a = nla_nest_start_noflag(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSLVLLST);
|
|
if (nla_a == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_failure_lock;
|
|
}
|
|
for (iter = 0;
|
|
iter < doi_def->map.std->lvl.local_size;
|
|
iter++) {
|
|
if (doi_def->map.std->lvl.local[iter] ==
|
|
CIPSO_V4_INV_LVL)
|
|
continue;
|
|
|
|
nla_b = nla_nest_start_noflag(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSLVL);
|
|
if (nla_b == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_retry;
|
|
}
|
|
ret_val = nla_put_u32(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSLVLLOC,
|
|
iter);
|
|
if (ret_val != 0)
|
|
goto list_retry;
|
|
ret_val = nla_put_u32(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSLVLREM,
|
|
doi_def->map.std->lvl.local[iter]);
|
|
if (ret_val != 0)
|
|
goto list_retry;
|
|
nla_nest_end(ans_skb, nla_b);
|
|
}
|
|
nla_nest_end(ans_skb, nla_a);
|
|
|
|
nla_a = nla_nest_start_noflag(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSCATLST);
|
|
if (nla_a == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_retry;
|
|
}
|
|
for (iter = 0;
|
|
iter < doi_def->map.std->cat.local_size;
|
|
iter++) {
|
|
if (doi_def->map.std->cat.local[iter] ==
|
|
CIPSO_V4_INV_CAT)
|
|
continue;
|
|
|
|
nla_b = nla_nest_start_noflag(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSCAT);
|
|
if (nla_b == NULL) {
|
|
ret_val = -ENOMEM;
|
|
goto list_retry;
|
|
}
|
|
ret_val = nla_put_u32(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSCATLOC,
|
|
iter);
|
|
if (ret_val != 0)
|
|
goto list_retry;
|
|
ret_val = nla_put_u32(ans_skb,
|
|
NLBL_CIPSOV4_A_MLSCATREM,
|
|
doi_def->map.std->cat.local[iter]);
|
|
if (ret_val != 0)
|
|
goto list_retry;
|
|
nla_nest_end(ans_skb, nla_b);
|
|
}
|
|
nla_nest_end(ans_skb, nla_a);
|
|
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
genlmsg_end(ans_skb, data);
|
|
return genlmsg_reply(ans_skb, info);
|
|
|
|
list_retry:
|
|
/* XXX - this limit is a guesstimate */
|
|
if (nlsze_mult < 4) {
|
|
rcu_read_unlock();
|
|
kfree_skb(ans_skb);
|
|
nlsze_mult *= 2;
|
|
goto list_start;
|
|
}
|
|
list_failure_lock:
|
|
rcu_read_unlock();
|
|
list_failure:
|
|
kfree_skb(ans_skb);
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_listall_cb - cipso_v4_doi_walk() callback for LISTALL
|
|
* @doi_def: the CIPSOv4 DOI definition
|
|
* @arg: the netlbl_cipsov4_doiwalk_arg structure
|
|
*
|
|
* Description:
|
|
* This function is designed to be used as a callback to the
|
|
* cipso_v4_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_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
|
|
{
|
|
int ret_val = -ENOMEM;
|
|
struct netlbl_cipsov4_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_cipsov4_gnl_family,
|
|
NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL);
|
|
if (data == NULL)
|
|
goto listall_cb_failure;
|
|
|
|
ret_val = nla_put_u32(cb_arg->skb, NLBL_CIPSOV4_A_DOI, doi_def->doi);
|
|
if (ret_val != 0)
|
|
goto listall_cb_failure;
|
|
ret_val = nla_put_u32(cb_arg->skb,
|
|
NLBL_CIPSOV4_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_cipsov4_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_cipsov4_listall(struct sk_buff *skb,
|
|
struct netlink_callback *cb)
|
|
{
|
|
struct netlbl_cipsov4_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;
|
|
|
|
cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg);
|
|
|
|
cb->args[0] = doi_skip;
|
|
return skb->len;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_remove_cb - netlbl_cipsov4_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_cipsov4_remove() as the callback
|
|
* for the netlbl_domhsh_walk() function; it removes LSM domain map entries
|
|
* which are associated with the CIPSO DOI specified in @arg. Returns zero on
|
|
* success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_cipsov4_remove_cb(struct netlbl_dom_map *entry, void *arg)
|
|
{
|
|
struct netlbl_domhsh_walk_arg *cb_arg = arg;
|
|
|
|
if (entry->def.type == NETLBL_NLTYPE_CIPSOV4 &&
|
|
entry->def.cipso->doi == cb_arg->doi)
|
|
return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* netlbl_cipsov4_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_cipsov4_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_CIPSOV4_A_DOI])
|
|
return -EINVAL;
|
|
|
|
netlbl_netlink_auditinfo(skb, &audit_info);
|
|
cb_arg.doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
|
|
cb_arg.audit_info = &audit_info;
|
|
ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
|
|
netlbl_cipsov4_remove_cb, &cb_arg);
|
|
if (ret_val == 0 || ret_val == -ENOENT) {
|
|
ret_val = cipso_v4_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_cipsov4_ops[] = {
|
|
{
|
|
.cmd = NLBL_CIPSOV4_C_ADD,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.doit = netlbl_cipsov4_add,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_CIPSOV4_C_REMOVE,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.doit = netlbl_cipsov4_remove,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_CIPSOV4_C_LIST,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = 0,
|
|
.doit = netlbl_cipsov4_list,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_CIPSOV4_C_LISTALL,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = 0,
|
|
.doit = NULL,
|
|
.dumpit = netlbl_cipsov4_listall,
|
|
},
|
|
};
|
|
|
|
static struct genl_family netlbl_cipsov4_gnl_family __ro_after_init = {
|
|
.hdrsize = 0,
|
|
.name = NETLBL_NLTYPE_CIPSOV4_NAME,
|
|
.version = NETLBL_PROTO_VERSION,
|
|
.maxattr = NLBL_CIPSOV4_A_MAX,
|
|
.policy = netlbl_cipsov4_genl_policy,
|
|
.module = THIS_MODULE,
|
|
.small_ops = netlbl_cipsov4_ops,
|
|
.n_small_ops = ARRAY_SIZE(netlbl_cipsov4_ops),
|
|
};
|
|
|
|
/*
|
|
* NetLabel Generic NETLINK Protocol Functions
|
|
*/
|
|
|
|
/**
|
|
* netlbl_cipsov4_genl_init - Register the CIPSOv4 NetLabel component
|
|
*
|
|
* Description:
|
|
* Register the CIPSOv4 packet NetLabel component with the Generic NETLINK
|
|
* mechanism. Returns zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
int __init netlbl_cipsov4_genl_init(void)
|
|
{
|
|
return genl_register_family(&netlbl_cipsov4_gnl_family);
|
|
}
|