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| author |   Arnd Bergmann <arnd@arndb.de> | 2015-09-30 13:26:39 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-05 03:16:47 -0700 |
| commit | 3dd7669f1f13772d0a846dee58379399f163729c (patch) | |
| tree | 3404c02718e7fcbb04a6c1594bbeede886a8d8d5 | |
| parent | nfnetlink: use y2038 safe timestamp (diff) | |
| download | linux-dev-3dd7669f1f13772d0a846dee58379399f163729c.tar.xz linux-dev-3dd7669f1f13772d0a846dee58379399f163729c.zip | |
ipv6: use ktime_t for internal timestamps
The ipv6 mip6 implementation is one of only a few users of the
skb_get_timestamp() function in the kernel, which is both unsafe
on 32-bit architectures because of the 2038 overflow, and slightly
less efficient than the skb_get_ktime() based approach.
This converts the function call and the mip6_report_rate_limiter
structure that stores the time stamp, eliminating all uses of
timeval in the ipv6 code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/mip6.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c index b9779d441b12..60c79a08e14a 100644 --- a/net/ipv6/mip6.c +++ b/net/ipv6/mip6.c @@ -118,7 +118,7 @@ static int mip6_mh_filter(struct sock *sk, struct sk_buff *skb) struct mip6_report_rate_limiter { spinlock_t lock; - struct timeval stamp; + ktime_t stamp; int iif; struct in6_addr src; struct in6_addr dst; @@ -184,20 +184,18 @@ static int mip6_destopt_output(struct xfrm_state *x, struct sk_buff *skb) return 0; } -static inline int mip6_report_rl_allow(struct timeval *stamp, +static inline int mip6_report_rl_allow(ktime_t stamp, const struct in6_addr *dst, const struct in6_addr *src, int iif) { int allow = 0; spin_lock_bh(&mip6_report_rl.lock); - if (mip6_report_rl.stamp.tv_sec != stamp->tv_sec || - mip6_report_rl.stamp.tv_usec != stamp->tv_usec || + if (!ktime_equal(mip6_report_rl.stamp, stamp) || mip6_report_rl.iif != iif || !ipv6_addr_equal(&mip6_report_rl.src, src) || !ipv6_addr_equal(&mip6_report_rl.dst, dst)) { - mip6_report_rl.stamp.tv_sec = stamp->tv_sec; - mip6_report_rl.stamp.tv_usec = stamp->tv_usec; + mip6_report_rl.stamp = stamp; mip6_report_rl.iif = iif; mip6_report_rl.src = *src; mip6_report_rl.dst = *dst; @@ -216,7 +214,7 @@ static int mip6_destopt_reject(struct xfrm_state *x, struct sk_buff *skb, struct ipv6_destopt_hao *hao = NULL; struct xfrm_selector sel; int offset; - struct timeval stamp; + ktime_t stamp; int err = 0; if (unlikely(fl6->flowi6_proto == IPPROTO_MH && @@ -230,9 +228,9 @@ static int mip6_destopt_reject(struct xfrm_state *x, struct sk_buff *skb, (skb_network_header(skb) + offset); } - skb_get_timestamp(skb, &stamp); + stamp = skb_get_ktime(skb); - if (!mip6_report_rl_allow(&stamp, &ipv6_hdr(skb)->daddr, + if (!mip6_report_rl_allow(stamp, &ipv6_hdr(skb)->daddr, hao ? &hao->addr : &ipv6_hdr(skb)->saddr, opt->iif)) goto out; |