projects / ovs.git / blame
| Commit | Line | Data |
|---|---|---|
| 9cb8d24d | 1 | /* |
| e0edde6f | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
| 9cb8d24d | 3 | * |
| a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public | |
| 6 | * License as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 11 | * General Public License for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program; if not, write to the Free Software | |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 16 | * 02110-1301, USA | |
| 9cb8d24d JG |
17 | */ |
| 18 | ||
| 19 | #ifndef COMPAT_H | |
| 20 | #define COMPAT_H 1 | |
| 21 | ||
| 22 | #include <linux/netlink.h> | |
| 23 | ||
| 24 | #ifndef HAVE_NLA_NUL_STRING | |
| 25 | static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen) | |
| 26 | { | |
| 27 | char *s; | |
| 28 | int len; | |
| 29 | if (!attr) | |
| 30 | return 0; | |
| 31 | ||
| 32 | len = nla_len(attr); | |
| 33 | if (len >= maxlen) | |
| 34 | return -EINVAL; | |
| 35 | ||
| 36 | s = nla_data(attr); | |
| 37 | if (s[len - 1] != '\0') | |
| 38 | return -EINVAL; | |
| 39 | ||
| 40 | return 0; | |
| 41 | } | |
| 42 | #else | |
| 43 | static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen) | |
| 44 | { | |
| 45 | return 0; | |
| 46 | } | |
| 47 | #endif /* !HAVE_NLA_NUL_STRING */ | |
| 48 | ||
| eba9291a PS |
49 | static inline void skb_clear_rxhash(struct sk_buff *skb) |
| 50 | { | |
| 51 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35) | |
| 52 | skb->rxhash = 0; | |
| 53 | #endif | |
| 54 | } | |
| 55 | ||
| a647150f BP |
56 | /* |
| 57 | * Enforces, mutual exclusion with the Linux bridge module, by declaring and | |
| 58 | * exporting br_should_route_hook. Because the bridge module also exports the | |
| 59 | * same symbol, the module loader will refuse to load both modules at the same | |
| 60 | * time (e.g. "bridge: exports duplicate symbol br_should_route_hook (owned by | |
| 9b80f761 | 61 | * openvswitch)"). |
| a647150f BP |
62 | * |
| 63 | * Before Linux 2.6.36, Open vSwitch cannot safely coexist with the Linux | |
| 9b80f761 CW |
64 | * bridge module, so openvswitch uses this macro in those versions. In |
| 65 | * Linux 2.6.36 and later, Open vSwitch can coexist with the bridge module, | |
| 66 | * but it makes no sense to load both bridge and brcompat, so brcompat uses | |
| a647150f BP |
67 | * this macro in those versions. |
| 68 | * | |
| 69 | * The use of "typeof" here avoids the need to track changes in the type of | |
| 70 | * br_should_route_hook over various kernel versions. | |
| 71 | */ | |
| 72 | #define BRIDGE_MUTUAL_EXCLUSION \ | |
| 73 | typeof(br_should_route_hook) br_should_route_hook; \ | |
| 74 | EXPORT_SYMBOL(br_should_route_hook) | |
| 75 | ||
| 2a4999f3 PS |
76 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32) |
| 77 | #define GENL_SOCK(net) (genl_sock) | |
| 78 | #define SET_NETNSOK | |
| 79 | #else | |
| 80 | #define GENL_SOCK(net) ((net)->genl_sock) | |
| 81 | #define SET_NETNSOK .netnsok = true, | |
| 82 | #endif | |
| 83 | ||
| 9cb8d24d | 84 | #endif /* compat.h */ |