LCOV - code coverage report
Current view: top level - net/ipv6 - protocol.c (source / functions) Hit Total Coverage
Test: landlock.info Lines: 3 9 33.3 %
Date: 2021-04-22 12:43:58 Functions: 1 2 50.0 %

          Line data    Source code
       1             : // SPDX-License-Identifier: GPL-2.0-or-later
       2             : /*
       3             :  * INET         An implementation of the TCP/IP protocol suite for the LINUX
       4             :  *              operating system.  INET is implemented using the  BSD Socket
       5             :  *              interface as the means of communication with the user level.
       6             :  *
       7             :  *              PF_INET6 protocol dispatch tables.
       8             :  *
       9             :  * Authors:     Pedro Roque     <roque@di.fc.ul.pt>
      10             :  */
      11             : 
      12             : /*
      13             :  *      Changes:
      14             :  *
      15             :  *      Vince Laviano (vince@cs.stanford.edu)       16 May 2001
      16             :  *      - Removed unused variable 'inet6_protocol_base'
      17             :  *      - Modified inet6_del_protocol() to correctly maintain copy bit.
      18             :  */
      19             : #include <linux/module.h>
      20             : #include <linux/netdevice.h>
      21             : #include <linux/spinlock.h>
      22             : #include <net/protocol.h>
      23             : 
      24             : #if IS_ENABLED(CONFIG_IPV6)
      25             : struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
      26             : EXPORT_SYMBOL(inet6_protos);
      27             : 
      28             : int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
      29             : {
      30             :         return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
      31             :                         NULL, prot) ? 0 : -1;
      32             : }
      33             : EXPORT_SYMBOL(inet6_add_protocol);
      34             : 
      35             : int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
      36             : {
      37             :         int ret;
      38             : 
      39             :         ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
      40             :                        prot, NULL) == prot) ? 0 : -1;
      41             : 
      42             :         synchronize_net();
      43             : 
      44             :         return ret;
      45             : }
      46             : EXPORT_SYMBOL(inet6_del_protocol);
      47             : #endif
      48             : 
      49             : const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly;
      50             : EXPORT_SYMBOL(inet6_offloads);
      51             : 
      52           5 : int inet6_add_offload(const struct net_offload *prot, unsigned char protocol)
      53             : {
      54           5 :         return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
      55           5 :                         NULL, prot) ? 0 : -1;
      56             : }
      57             : EXPORT_SYMBOL(inet6_add_offload);
      58             : 
      59           0 : int inet6_del_offload(const struct net_offload *prot, unsigned char protocol)
      60             : {
      61           0 :         int ret;
      62             : 
      63           0 :         ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
      64           0 :                        prot, NULL) == prot) ? 0 : -1;
      65             : 
      66           0 :         synchronize_net();
      67             : 
      68           0 :         return ret;
      69             : }
      70             : EXPORT_SYMBOL(inet6_del_offload);

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