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17e4857775
Add list_next_rcu() for fetching next list in rcu_deference safely. Found with sparse in linux-next tree on tag next-20171116. Signed-off-by: Tim Hansen <devtimhansen@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
209 lines
6.1 KiB
C
209 lines
6.1 KiB
C
/*
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* NetLabel Network Address Lists
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*
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* This file contains network address list functions used to manage ordered
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* lists of network addresses for use by the NetLabel subsystem. The NetLabel
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* system manages static and dynamic label mappings for network protocols such
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* 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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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef _NETLABEL_ADDRLIST_H
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#define _NETLABEL_ADDRLIST_H
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#include <linux/types.h>
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#include <linux/rcupdate.h>
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#include <linux/list.h>
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#include <linux/in6.h>
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#include <linux/audit.h>
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/**
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* struct netlbl_af4list - NetLabel IPv4 address list
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* @addr: IPv4 address
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* @mask: IPv4 address mask
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* @valid: valid flag
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* @list: list structure, used internally
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*/
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struct netlbl_af4list {
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__be32 addr;
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__be32 mask;
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u32 valid;
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struct list_head list;
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};
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/**
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* struct netlbl_af6list - NetLabel IPv6 address list
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* @addr: IPv6 address
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* @mask: IPv6 address mask
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* @valid: valid flag
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* @list: list structure, used internally
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*/
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struct netlbl_af6list {
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struct in6_addr addr;
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struct in6_addr mask;
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u32 valid;
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struct list_head list;
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};
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#define __af4list_entry(ptr) container_of(ptr, struct netlbl_af4list, list)
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static inline struct netlbl_af4list *__af4list_valid(struct list_head *s,
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struct list_head *h)
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{
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struct list_head *i = s;
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struct netlbl_af4list *n = __af4list_entry(s);
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while (i != h && !n->valid) {
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i = i->next;
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n = __af4list_entry(i);
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}
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return n;
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}
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static inline struct netlbl_af4list *__af4list_valid_rcu(struct list_head *s,
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struct list_head *h)
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{
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struct list_head *i = s;
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struct netlbl_af4list *n = __af4list_entry(s);
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while (i != h && !n->valid) {
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i = rcu_dereference(list_next_rcu(i));
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n = __af4list_entry(i);
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}
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return n;
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}
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#define netlbl_af4list_foreach(iter, head) \
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for (iter = __af4list_valid((head)->next, head); \
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&iter->list != (head); \
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iter = __af4list_valid(iter->list.next, head))
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#define netlbl_af4list_foreach_rcu(iter, head) \
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for (iter = __af4list_valid_rcu((head)->next, head); \
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&iter->list != (head); \
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iter = __af4list_valid_rcu(iter->list.next, head))
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#define netlbl_af4list_foreach_safe(iter, tmp, head) \
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for (iter = __af4list_valid((head)->next, head), \
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tmp = __af4list_valid(iter->list.next, head); \
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&iter->list != (head); \
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iter = tmp, tmp = __af4list_valid(iter->list.next, head))
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int netlbl_af4list_add(struct netlbl_af4list *entry,
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struct list_head *head);
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struct netlbl_af4list *netlbl_af4list_remove(__be32 addr, __be32 mask,
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struct list_head *head);
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void netlbl_af4list_remove_entry(struct netlbl_af4list *entry);
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struct netlbl_af4list *netlbl_af4list_search(__be32 addr,
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struct list_head *head);
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struct netlbl_af4list *netlbl_af4list_search_exact(__be32 addr,
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__be32 mask,
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struct list_head *head);
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#ifdef CONFIG_AUDIT
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void netlbl_af4list_audit_addr(struct audit_buffer *audit_buf,
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int src, const char *dev,
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__be32 addr, __be32 mask);
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#else
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static inline void netlbl_af4list_audit_addr(struct audit_buffer *audit_buf,
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int src, const char *dev,
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__be32 addr, __be32 mask)
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{
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}
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#endif
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#if IS_ENABLED(CONFIG_IPV6)
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#define __af6list_entry(ptr) container_of(ptr, struct netlbl_af6list, list)
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static inline struct netlbl_af6list *__af6list_valid(struct list_head *s,
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struct list_head *h)
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{
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struct list_head *i = s;
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struct netlbl_af6list *n = __af6list_entry(s);
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while (i != h && !n->valid) {
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i = i->next;
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n = __af6list_entry(i);
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}
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return n;
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}
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static inline struct netlbl_af6list *__af6list_valid_rcu(struct list_head *s,
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struct list_head *h)
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{
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struct list_head *i = s;
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struct netlbl_af6list *n = __af6list_entry(s);
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while (i != h && !n->valid) {
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i = rcu_dereference(list_next_rcu(i));
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n = __af6list_entry(i);
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}
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return n;
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}
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#define netlbl_af6list_foreach(iter, head) \
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for (iter = __af6list_valid((head)->next, head); \
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&iter->list != (head); \
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iter = __af6list_valid(iter->list.next, head))
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#define netlbl_af6list_foreach_rcu(iter, head) \
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for (iter = __af6list_valid_rcu((head)->next, head); \
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&iter->list != (head); \
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iter = __af6list_valid_rcu(iter->list.next, head))
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#define netlbl_af6list_foreach_safe(iter, tmp, head) \
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for (iter = __af6list_valid((head)->next, head), \
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tmp = __af6list_valid(iter->list.next, head); \
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&iter->list != (head); \
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iter = tmp, tmp = __af6list_valid(iter->list.next, head))
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int netlbl_af6list_add(struct netlbl_af6list *entry,
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struct list_head *head);
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struct netlbl_af6list *netlbl_af6list_remove(const struct in6_addr *addr,
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const struct in6_addr *mask,
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struct list_head *head);
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void netlbl_af6list_remove_entry(struct netlbl_af6list *entry);
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struct netlbl_af6list *netlbl_af6list_search(const struct in6_addr *addr,
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struct list_head *head);
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struct netlbl_af6list *netlbl_af6list_search_exact(const struct in6_addr *addr,
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const struct in6_addr *mask,
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struct list_head *head);
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#ifdef CONFIG_AUDIT
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void netlbl_af6list_audit_addr(struct audit_buffer *audit_buf,
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int src,
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const char *dev,
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const struct in6_addr *addr,
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const struct in6_addr *mask);
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#else
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static inline void netlbl_af6list_audit_addr(struct audit_buffer *audit_buf,
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int src,
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const char *dev,
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const struct in6_addr *addr,
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const struct in6_addr *mask)
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{
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}
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#endif
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#endif /* IPV6 */
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#endif
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