diff options
Diffstat (limited to 'backport-include/linux/net.h')
| -rw-r--r-- | backport-include/linux/net.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/backport-include/linux/net.h b/backport-include/linux/net.h new file mode 100644 index 0000000..738ff8b --- /dev/null +++ b/backport-include/linux/net.h @@ -0,0 +1,112 @@ +#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 */ |