Release 4.11 net/netlabel/netlabel_kapi.c
/*
* NetLabel Kernel API
*
* This file defines the kernel API for the NetLabel system. The NetLabel
* system manages static and dynamic label mappings for network protocols such
* as CIPSO and RIPSO.
*
* Author: Paul Moore <paul@paul-moore.com>
*
*/
/*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/audit.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <net/calipso.h>
#include <asm/bug.h>
#include <linux/atomic.h>
#include "netlabel_domainhash.h"
#include "netlabel_unlabeled.h"
#include "netlabel_cipso_v4.h"
#include "netlabel_calipso.h"
#include "netlabel_user.h"
#include "netlabel_mgmt.h"
#include "netlabel_addrlist.h"
/*
* Configuration Functions
*/
/**
* netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
* @domain: the domain mapping to remove
* @family: address family
* @addr: IP address
* @mask: IP address mask
* @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,
u16 family,
const void *addr,
const void *mask,
struct netlbl_audit *audit_info)
{
if (addr == NULL && mask == NULL) {
return netlbl_domhsh_remove(domain, family, audit_info);
} else if (addr != NULL && mask != NULL) {
switch (family) {
case AF_INET:
return netlbl_domhsh_remove_af4(domain, addr, mask,
audit_info);
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
return netlbl_domhsh_remove_af6(domain, addr, mask,
audit_info);
#endif /* IPv6 */
default:
return -EPFNOSUPPORT;
}
} else
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 92 | 77.97% | 2 | 50.00% |
Huw Davies | 26 | 22.03% | 2 | 50.00% |
Total | 118 | 100.00% | 4 | 100.00% |
/**
* netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
* @domain: the domain mapping to add
* @family: address family
* @addr: IP address
* @mask: IP address mask
* @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_map_add(const char *domain,
u16 family,
const void *addr,
const void *mask,
struct netlbl_audit *audit_info)
{
int ret_val = -ENOMEM;
struct netlbl_dom_map *entry;
struct netlbl_domaddr_map *addrmap = NULL;
struct netlbl_domaddr4_map *map4 = NULL;
struct netlbl_domaddr6_map *map6 = NULL;
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL)
return -ENOMEM;
if (domain != NULL) {
entry->domain = kstrdup(domain, GFP_ATOMIC);
if (entry->domain == NULL)
goto cfg_unlbl_map_add_failure;
}
entry->family = family;
if (addr == NULL && mask == NULL)
entry->def.type = NETLBL_NLTYPE_UNLABELED;
else if (addr != NULL && mask != NULL) {
addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
if (addrmap == NULL)
goto cfg_unlbl_map_add_failure;
INIT_LIST_HEAD(&addrmap->list4);
INIT_LIST_HEAD(&addrmap->list6);
switch (family) {
case AF_INET: {
const struct in_addr *addr4 = addr;
const struct in_addr *mask4 = mask;
map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
if (map4 == NULL)
goto cfg_unlbl_map_add_failure;
map4->def.type = NETLBL_NLTYPE_UNLABELED;
map4->list.addr = addr4->s_addr & mask4->s_addr;
map4->list.mask = mask4->s_addr;
map4->list.valid = 1;
ret_val = netlbl_af4list_add(&map4->list,
&addrmap->list4);
if (ret_val != 0)
goto cfg_unlbl_map_add_failure;
break;
}
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6: {
const struct in6_addr *addr6 = addr;
const struct in6_addr *mask6 = mask;
map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
if (map6 == NULL)
goto cfg_unlbl_map_add_failure;
map6->def.type = NETLBL_NLTYPE_UNLABELED;
map6->list.addr = *addr6;
map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
map6->list.mask = *mask6;
map6->list.valid = 1;
ret_val = netlbl_af6list_add(&map6->list,
&addrmap->list6);
if (ret_val != 0)
goto cfg_unlbl_map_add_failure;
break;
}
#endif /* IPv6 */
default:
goto cfg_unlbl_map_add_failure;
}
entry->def.addrsel = addrmap;
entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
} else {
ret_val = -EINVAL;
goto cfg_unlbl_map_add_failure;
}
ret_val = netlbl_domhsh_add(entry, audit_info);
if (ret_val != 0)
goto cfg_unlbl_map_add_failure;
return 0;
cfg_unlbl_map_add_failure:
kfree(entry->domain);
kfree(entry);
kfree(addrmap);
kfree(map4);
kfree(map6);
return ret_val;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 554 | 97.36% | 6 | 54.55% |
Huw Davies | 6 | 1.05% | 1 | 9.09% |
Alexey Dobriyan | 4 | 0.70% | 1 | 9.09% |
Dan Carpenter | 3 | 0.53% | 1 | 9.09% |
Julia Lawall | 1 | 0.18% | 1 | 9.09% |
Eric Dumazet | 1 | 0.18% | 1 | 9.09% |
Total | 569 | 100.00% | 11 | 100.00% |
/**
* netlbl_cfg_unlbl_static_add - Adds a new static label
* @net: network namespace
* @dev_name: interface name
* @addr: IP address in network byte order (struct in[6]_addr)
* @mask: address mask in network byte order (struct in[6]_addr)
* @family: address family
* @secid: LSM secid value for the entry
* @audit_info: NetLabel audit information
*
* Description:
* Adds a new NetLabel static label to be used when protocol provided labels
* are not present on incoming traffic. If @dev_name is NULL then the default
* interface will be used. Returns zero on success, negative values on failure.
*
*/
int netlbl_cfg_unlbl_static_add(struct net *net,
const char *dev_name,
const void *addr,
const void *mask,
u16 family,
u32 secid,
struct netlbl_audit *audit_info)
{
u32 addr_len;
switch (family) {
case AF_INET:
addr_len = sizeof(struct in_addr);
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
addr_len = sizeof(struct in6_addr);
break;
#endif /* IPv6 */
default:
return -EPFNOSUPPORT;
}
return netlbl_unlhsh_add(net,
dev_name, addr, mask, addr_len,
secid, audit_info);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 100 | 99.01% | 2 | 66.67% |
Eric Dumazet | 1 | 0.99% | 1 | 33.33% |
Total | 101 | 100.00% | 3 | 100.00% |
/**
* netlbl_cfg_unlbl_static_del - Removes an existing static label
* @net: network namespace
* @dev_name: interface name
* @addr: IP address in network byte order (struct in[6]_addr)
* @mask: address mask in network byte order (struct in[6]_addr)
* @family: address family
* @audit_info: NetLabel audit information
*
* Description:
* Removes an existing NetLabel static label used when protocol provided labels
* are not present on incoming traffic. If @dev_name is NULL then the default
* interface will be used. Returns zero on success, negative values on failure.
*
*/
int netlbl_cfg_unlbl_static_del(struct net *net,
const char *dev_name,
const void *addr,
const void *mask,
u16 family,
struct netlbl_audit *audit_info)
{
u32 addr_len;
switch (family) {
case AF_INET:
addr_len = sizeof(struct in_addr);
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
addr_len = sizeof(struct in6_addr);
break;
#endif /* IPv6 */
default:
return -EPFNOSUPPORT;
}
return netlbl_unlhsh_remove(net,
dev_name, addr, mask, addr_len,
audit_info);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 95 | 98.96% | 2 | 66.67% |
Eric Dumazet | 1 | 1.04% | 1 | 33.33% |
Total | 96 | 100.00% | 3 | 100.00% |
/**
* netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
* @doi_def: CIPSO DOI definition
* @audit_info: NetLabel audit information
*
* Description:
* Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
* success and negative values on failure.
*
*/
int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
struct netlbl_audit *audit_info)
{
return cipso_v4_doi_add(doi_def, audit_info);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 23 | 100.00% | 1 | 100.00% |
Total | 23 | 100.00% | 1 | 100.00% |
/**
* netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
* @doi: CIPSO DOI
* @audit_info: NetLabel audit information
*
* Description:
* Remove an existing CIPSO DOI definition matching @doi. Returns zero on
* success and negative values on failure.
*
*/
void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
{
cipso_v4_doi_remove(doi, audit_info);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 20 | 100.00% | 1 | 100.00% |
Total | 20 | 100.00% | 1 | 100.00% |
/**
* netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
* @doi: the CIPSO DOI
* @domain: the domain mapping to add
* @addr: IP address
* @mask: IP address mask
* @audit_info: NetLabel audit information
*
* Description:
* Add a new NetLabel/LSM domain mapping for the given CIPSO DOI 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_map_add(u32 doi,
const char *domain,
const struct in_addr *addr,
const struct in_addr *mask,
struct netlbl_audit *audit_info)
{
int ret_val = -ENOMEM;
struct cipso_v4_doi *doi_def;
struct netlbl_dom_map *entry;
struct netlbl_domaddr_map *addrmap = NULL;
struct netlbl_domaddr4_map *addrinfo = NULL;
doi_def = cipso_v4_doi_getdef(doi);
if (doi_def == NULL)
return -ENOENT;
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL)
goto out_entry;
entry->family = AF_INET;
if (domain != NULL) {
entry->domain = kstrdup(domain, GFP_ATOMIC);
if (entry->domain == NULL)
goto out_domain;
}
if (addr == NULL && mask == NULL) {
entry->def.cipso = doi_def;
entry->def.type = NETLBL_NLTYPE_CIPSOV4;
} else if (addr != NULL && mask != NULL) {
addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
if (addrmap == NULL)
goto out_addrmap;
INIT_LIST_HEAD(&addrmap->list4);
INIT_LIST_HEAD(&addrmap->list6);
addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
if (addrinfo == NULL)
goto out_addrinfo;
addrinfo->def.cipso = doi_def;
addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
addrinfo->list.addr = addr->s_addr & mask->s_addr;
addrinfo->list.mask = mask->s_addr;
addrinfo->list.valid = 1;
ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
if (ret_val != 0)
goto cfg_cipsov4_map_add_failure;
entry->def.addrsel = addrmap;
entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
} else {
ret_val = -EINVAL;
goto out_addrmap;
}
ret_val = netlbl_domhsh_add(entry, audit_info);
if (ret_val != 0)
goto cfg_cipsov4_map_add_failure;
return 0;
cfg_cipsov4_map_add_failure:
kfree(addrinfo);
out_addrinfo:
kfree(addrmap);
out_addrmap:
kfree(entry->domain);
out_domain:
kfree(entry);
out_entry:
cipso_v4_doi_putdef(doi_def);
return ret_val;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 367 | 92.68% | 6 | 75.00% |
Julia Lawall | 23 | 5.81% | 1 | 12.50% |
Huw Davies | 6 | 1.52% | 1 | 12.50% |
Total | 396 | 100.00% | 8 | 100.00% |
/**
* netlbl_cfg_calipso_add - Add a new CALIPSO DOI definition
* @doi_def: CALIPSO DOI definition
* @audit_info: NetLabel audit information
*
* Description:
* Add a new CALIPSO DOI definition as defined by @doi_def. Returns zero on
* success and negative values on failure.
*
*/
int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
struct netlbl_audit *audit_info)
{
#if IS_ENABLED(CONFIG_IPV6)
return calipso_doi_add(doi_def, audit_info);
#else /* IPv6 */
return -ENOSYS;
#endif /* IPv6 */
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Huw Davies | 39 | 100.00% | 1 | 100.00% |
Total | 39 | 100.00% | 1 | 100.00% |
/**
* netlbl_cfg_calipso_del - Remove an existing CALIPSO DOI definition
* @doi: CALIPSO DOI
* @audit_info: NetLabel audit information
*
* Description:
* Remove an existing CALIPSO DOI definition matching @doi. Returns zero on
* success and negative values on failure.
*
*/
void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info)
{
#if IS_ENABLED(CONFIG_IPV6)
calipso_doi_remove(doi, audit_info);
#endif /* IPv6 */
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Huw Davies | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
/**
* netlbl_cfg_calipso_map_add - Add a new CALIPSO DOI mapping
* @doi: the CALIPSO DOI
* @domain: the domain mapping to add
* @addr: IP address
* @mask: IP address mask
* @audit_info: NetLabel audit information
*
* Description:
* Add a new NetLabel/LSM domain mapping for the given CALIPSO DOI 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_calipso_map_add(u32 doi,
const char *domain,
const struct in6_addr *addr,
const struct in6_addr *mask,
struct netlbl_audit *audit_info)
{
#if IS_ENABLED(CONFIG_IPV6)
int ret_val = -ENOMEM;
struct calipso_doi *doi_def;
struct netlbl_dom_map *entry;
struct netlbl_domaddr_map *addrmap = NULL;
struct netlbl_domaddr6_map *addrinfo = NULL;
doi_def = calipso_doi_getdef(doi);
if (doi_def == NULL)
return -ENOENT;
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL)
goto out_entry;
entry->family = AF_INET6;
if (domain != NULL) {
entry->domain = kstrdup(domain, GFP_ATOMIC);
if (entry->domain == NULL)
goto out_domain;
}
if (addr == NULL && mask == NULL) {
entry->def.calipso = doi_def;
entry->def.type = NETLBL_NLTYPE_CALIPSO;
} else if (addr != NULL && mask != NULL) {
addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
if (addrmap == NULL)
goto out_addrmap;
INIT_LIST_HEAD(&addrmap->list4);
INIT_LIST_HEAD(&addrmap->list6);
addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
if (addrinfo == NULL)
goto out_addrinfo;
addrinfo->def.calipso = doi_def;
addrinfo->def.type = NETLBL_NLTYPE_CALIPSO;
addrinfo->list.addr = *addr;
addrinfo->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
addrinfo->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
addrinfo->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
addrinfo->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
addrinfo->list.mask = *mask;
addrinfo->list.valid = 1;
ret_val = netlbl_af6list_add(&addrinfo->list, &addrmap->list6);
if (ret_val != 0)
goto cfg_calipso_map_add_failure;
entry->def.addrsel = addrmap;
entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
} else {
ret_val = -EINVAL;
goto out_addrmap;
}
ret_val = netlbl_domhsh_add(entry, audit_info);
if (ret_val != 0)
goto cfg_calipso_map_add_failure;
return 0;
cfg_calipso_map_add_failure:
kfree(addrinfo);
out_addrinfo:
kfree(addrmap);
out_addrmap:
kfree(entry->domain);
out_domain:
kfree(entry);
out_entry:
calipso_doi_putdef(doi_def);
return ret_val;
#else /* IPv6 */
return -ENOSYS;
#endif /* IPv6 */
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Huw Davies | 478 | 100.00% | 1 | 100.00% |
Total | 478 | 100.00% | 1 | 100.00% |
/*
* Security Attribute Functions
*/
#define _CM_F_NONE 0x00000000
#define _CM_F_ALLOC 0x00000001
#define _CM_F_WALK 0x00000002
/**
* _netlbl_catmap_getnode - Get a individual node from a catmap
* @catmap: pointer to the category bitmap
* @offset: the requested offset
* @cm_flags: catmap flags, see _CM_F_*
* @gfp_flags: memory allocation flags
*
* Description:
* Iterate through the catmap looking for the node associated with @offset.
* If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node,
* one will be created and inserted into the catmap. If the _CM_F_WALK flag is
* set in @cm_flags and there is no associated node, the next highest node will
* be returned. Returns a pointer to the node on success, NULL on failure.
*
*/
static struct netlbl_lsm_catmap *_netlbl_catmap_getnode(
struct netlbl_lsm_catmap **catmap,
u32 offset,
unsigned int cm_flags,
gfp_t gfp_flags)
{
struct netlbl_lsm_catmap *iter = *catmap;
struct netlbl_lsm_catmap *prev = NULL;
if (iter == NULL)
goto catmap_getnode_alloc;
if (offset < iter->startbit)
goto catmap_getnode_walk;
while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
prev = iter;
iter = iter->next;
}
if (iter == NULL || offset < iter->startbit)
goto catmap_getnode_walk;
return iter;
catmap_getnode_walk:
if (cm_flags & _CM_F_WALK)
return iter;
catmap_getnode_alloc:
if (!(cm_flags & _CM_F_ALLOC))
return NULL;
iter = netlbl_catmap_alloc(gfp_flags);
if (iter == NULL)
return NULL;
iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1);
if (prev == NULL) {
iter->next = *catmap;
*catmap = iter;
} else {
iter->next = prev->next;
prev->next = iter;
}
return iter;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 197 | 100.00% | 3 | 100.00% |
Total | 197 | 100.00% | 3 | 100.00% |
/**
* netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit
* @catmap: the category bitmap
* @offset: the offset to start searching at, in bits
*
* Description:
* This function walks a LSM secattr category bitmap starting at @offset and
* returns the spot of the first set bit or -ENOENT if no bits are set.
*
*/
int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset)
{
struct netlbl_lsm_catmap *iter = catmap;
u32 idx;
u32 bit;
NETLBL_CATMAP_MAPTYPE bitmap;
iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
if (iter == NULL)
return -ENOENT;
if (offset > iter->startbit) {
offset -= iter->startbit;
idx = offset / NETLBL_CATMAP_MAPSIZE;
bit = offset % NETLBL_CATMAP_MAPSIZE;
} else {
idx = 0;
bit = 0;
}
bitmap = iter->bitmap[idx] >> bit;
for (;;) {
if (bitmap != 0) {
while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
bitmap >>= 1;
bit++;
}
return iter->startbit +
(NETLBL_CATMAP_MAPSIZE * idx) + bit;
}
if (++idx >= NETLBL_CATMAP_MAPCNT) {
if (iter->next != NULL) {
iter = iter->next;
idx = 0;
} else
return -ENOENT;
}
bitmap = iter->bitmap[idx];
bit = 0;
}
return -ENOENT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 201 | 100.00% | 3 | 100.00% |
Total | 201 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(netlbl_catmap_walk);
/**
* netlbl_catmap_walkrng - Find the end of a string of set bits
* @catmap: the category bitmap
* @offset: the offset to start searching at, in bits
*
* Description:
* This function walks a LSM secattr category bitmap starting at @offset and
* returns the spot of the first cleared bit or -ENOENT if the offset is past
* the end of the bitmap.
*
*/
int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset)
{
struct netlbl_lsm_catmap *iter;
struct netlbl_lsm_catmap *prev = NULL;
u32 idx;
u32 bit;
NETLBL_CATMAP_MAPTYPE bitmask;
NETLBL_CATMAP_MAPTYPE bitmap;
iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
if (iter == NULL)
return -ENOENT;
if (offset > iter->startbit) {
offset -= iter->startbit;
idx = offset / NETLBL_CATMAP_MAPSIZE;
bit = offset % NETLBL_CATMAP_MAPSIZE;
} else {
idx = 0;
bit = 0;
}
bitmask = NETLBL_CATMAP_BIT << bit;
for (;;) {
bitmap = iter->bitmap[idx];
while (bitmask != 0 && (bitmap & bitmask) != 0) {
bitmask <<= 1;
bit++;
}
if (prev && idx == 0 && bit == 0)
return prev->startbit + NETLBL_CATMAP_SIZE - 1;
else if (bitmask != 0)
return iter->startbit +
(NETLBL_CATMAP_MAPSIZE * idx) + bit - 1;
else if (++idx >= NETLBL_CATMAP_MAPCNT) {
if (iter->next == NULL)
return iter->startbit + NETLBL_CATMAP_SIZE - 1;
prev = iter;
iter = iter->next;
idx = 0;
}
bitmask = NETLBL_CATMAP_BIT;
bit = 0;
}
return -ENOENT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 241 | 100.00% | 3 | 100.00% |
Total | 241 | 100.00% | 3 | 100.00% |
/**
* netlbl_catmap_getlong - Export an unsigned long bitmap
* @catmap: pointer to the category bitmap
* @offset: pointer to the requested offset
* @bitmap: the exported bitmap
*
* Description:
* Export a bitmap with an offset greater than or equal to @offset and return
* it in @bitmap. The @offset must be aligned to an unsigned long and will be
* updated on return if different from what was requested; if the catmap is
* empty at the requested offset and beyond, the @offset is set to (u32)-1.
* Returns zero on sucess, negative values on failure.
*
*/
int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
u32 *offset,
unsigned long *bitmap)
{
struct netlbl_lsm_catmap *iter;
u32 off = *offset;
u32 idx;
/* only allow aligned offsets */
if ((off & (BITS_PER_LONG - 1)) != 0)
return -EINVAL;
if (off < catmap->startbit) {
off = catmap->startbit;
*offset = off;
}
iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0);
if (iter == NULL) {
*offset = (u32)-1;
return 0;
}
if (off < iter->startbit) {
*offset = iter->startbit;
off = 0;
} else
off -= iter->startbit;
idx = off / NETLBL_CATMAP_MAPSIZE;
*bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 160 | 100.00% | 5 | 100.00% |
Total | 160 | 100.00% | 5 | 100.00% |
/**
* netlbl_catmap_setbit - Set a bit in a LSM secattr catmap
* @catmap: pointer to the category bitmap
* @bit: the bit to set
* @flags: memory allocation flags
*
* Description:
* Set the bit specified by @bit in @catmap. Returns zero on success,
* negative values on failure.
*
*/
int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
u32 bit,
gfp_t flags)
{
struct netlbl_lsm_catmap *iter;
u32 idx;
iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags);
if (iter == NULL)
return -ENOMEM;
bit -= iter->startbit;
idx = bit / NETLBL_CATMAP_MAPSIZE;
iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 78 | 100.00% | 3 | 100.00% |
Total | 78 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(netlbl_catmap_setbit);
/**
* netlbl_catmap_setrng - Set a range of bits in a LSM secattr catmap
* @catmap: pointer to the category bitmap
* @start: the starting bit
* @end: the last bit in the string
* @flags: memory allocation flags
*
* Description:
* Set a range of bits, starting at @start and ending with @end. Returns zero
* on success, negative values on failure.
*
*/
int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
u32 start,
u32 end,
gfp_t flags)
{
int rc = 0;
u32 spot = start;
while (rc == 0 && spot <= end) {
if (((spot & (BITS_PER_LONG - 1)) == 0) &&
((end - spot) > BITS_PER_LONG)) {
rc = netlbl_catmap_setlong(catmap,
spot,
(unsigned long)-1,
flags);
spot += BITS_PER_LONG;
} else
rc = netlbl_catmap_setbit(catmap, spot++, flags);
}
return rc;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 107 | 99.07% | 4 | 80.00% |
Janak Desai | 1 | 0.93% | 1 | 20.00% |
Total | 108 | 100.00% | 5 | 100.00% |
/**
* netlbl_catmap_setlong - Import an unsigned long bitmap
* @catmap: pointer to the category bitmap
* @offset: offset to the start of the imported bitmap
* @bitmap: the bitmap to import
* @flags: memory allocation flags
*
* Description:
* Import the bitmap specified in @bitmap into @catmap, using the offset
* in @offset. The offset must be aligned to an unsigned long. Returns zero
* on success, negative values on failure.
*
*/
int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
u32 offset,
unsigned long bitmap,
gfp_t flags)
{
struct netlbl_lsm_catmap *iter;
u32 idx;
/* only allow aligned offsets */
if ((offset & (BITS_PER_LONG - 1)) != 0)
return -EINVAL;
iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC