| #ifndef __BACKPORT_LINUX_NET_H |
| #define __BACKPORT_LINUX_NET_H |
| #include_next <linux/net.h> |
| #include <linux/static_key.h> |
| |
| /* This backports: |
| * |
| * commit 2033e9bf06f07e049bbc77e9452856df846714cc -- from v3.5 |
| * Author: Neil Horman <nhorman@tuxdriver.com> |
| * Date: Tue May 29 09:30:40 2012 +0000 |
| * |
| * net: add MODULE_ALIAS_NET_PF_PROTO_NAME |
| */ |
| #ifndef MODULE_ALIAS_NET_PF_PROTO_NAME |
| #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \ |
| MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ |
| name) |
| #endif |
| |
| #ifndef net_ratelimited_function |
| #define net_ratelimited_function(function, ...) \ |
| do { \ |
| if (net_ratelimit()) \ |
| function(__VA_ARGS__); \ |
| } while (0) |
| |
| #define net_emerg_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__) |
| #define net_alert_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__) |
| #define net_crit_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__) |
| #define net_err_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__) |
| #define net_notice_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__) |
| #define net_warn_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__) |
| #define net_info_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__) |
| #define net_dbg_ratelimited(fmt, ...) \ |
| net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__) |
| #endif |
| |
| #ifndef DECLARE_SOCKADDR |
| #define DECLARE_SOCKADDR(type, dst, src) \ |
| type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) |
| #endif |
| |
| /* |
| * Avoid backporting this if a distro did the work already, this |
| * takes the check a bit further than just using LINUX_BACKPORT() |
| * namespace, curious if any distro will hit a wall with this. |
| * Also curious if any distro will be daring enough to even try |
| * to backport this to a release older than 3.5. |
| */ |
| #ifndef ___NET_RANDOM_STATIC_KEY_INIT |
| /* |
| * Backporting this before 3.5 is extremely tricky -- I tried, due |
| * to the fact that it relies on static keys, which were refactored |
| * and optimized through a series of generation of patches from jump |
| * labels. These in turn have also been optimized through kernel revisions |
| * and have architecture specific code, which if you commit to backporting |
| * may affect tracing. My recommendation is that if you have a need for |
| * static keys you just require at least 3.5 to remain sane. |
| */ |
| #if LINUX_VERSION_IS_GEQ(3,5,0) && !defined(net_get_random_once) |
| #define __BACKPORT_NET_GET_RANDOM_ONCE 1 |
| #endif |
| #endif /* ___NET_RANDOM_STATIC_KEY_INIT */ |
| |
| #ifdef __BACKPORT_NET_GET_RANDOM_ONCE |
| #define __net_get_random_once LINUX_BACKPORT(__net_get_random_once) |
| bool __net_get_random_once(void *buf, int nbytes, bool *done, |
| struct static_key *done_key); |
| |
| #ifdef HAVE_JUMP_LABEL |
| #define ___NET_RANDOM_STATIC_KEY_INIT ((struct static_key) \ |
| { .enabled = ATOMIC_INIT(0), .entries = (void *)1 }) |
| #else /* !HAVE_JUMP_LABEL */ |
| #define ___NET_RANDOM_STATIC_KEY_INIT STATIC_KEY_INIT_FALSE |
| #endif /* HAVE_JUMP_LABEL */ |
| |
| #define net_get_random_once(buf, nbytes) \ |
| ({ \ |
| bool ___ret = false; \ |
| static bool ___done = false; \ |
| static struct static_key ___done_key = \ |
| ___NET_RANDOM_STATIC_KEY_INIT; \ |
| if (!static_key_true(&___done_key)) \ |
| ___ret = __net_get_random_once(buf, \ |
| nbytes, \ |
| &___done, \ |
| &___done_key); \ |
| ___ret; \ |
| }) |
| |
| #endif /* __BACKPORT_NET_GET_RANDOM_ONCE */ |
| |
| #if LINUX_VERSION_IS_LESS(4,2,0) |
| #define sock_create_kern(net, family, type, proto, res) \ |
| __sock_create(net, family, type, proto, res, 1) |
| #endif |
| |
| #ifndef SOCKWQ_ASYNC_NOSPACE |
| #define SOCKWQ_ASYNC_NOSPACE SOCK_ASYNC_NOSPACE |
| #endif |
| #ifndef SOCKWQ_ASYNC_WAITDATA |
| #define SOCKWQ_ASYNC_WAITDATA SOCK_ASYNC_WAITDATA |
| #endif |
| |
| #endif /* __BACKPORT_LINUX_NET_H */ |