From 7088ad74e6e710d0c80ea2cead9500f47a2a5d58 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Wed, 23 Oct 2013 11:06:57 +0200 Subject: [PATCH] inet: remove old fragmentation hash initializing All fragmentation hash secrets now get initialized by their corresponding hash function with net_get_random_once. Thus we can eliminate the initial seeding. Also provide a comment that hash secret seeding happens at the first call to the corresponding hashing function. Cc: David S. Miller Cc: Eric Dumazet Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- include/net/inet_frag.h | 4 ++++ net/ipv4/inet_fragment.c | 3 --- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index bfcbc001..6f59de9 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -64,6 +64,10 @@ struct inet_frags { rwlock_t lock ____cacheline_aligned_in_smp; int secret_interval; struct timer_list secret_timer; + + /* The first call to hashfn is responsible to initialize + * rnd. This is best done with net_get_random_once. + */ u32 rnd; int qsize; diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index c5313a9..bb075fc 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -93,9 +93,6 @@ void inet_frags_init(struct inet_frags *f) } rwlock_init(&f->lock); - f->rnd = (u32) ((totalram_pages ^ (totalram_pages >> 7)) ^ - (jiffies ^ (jiffies >> 6))); - setup_timer(&f->secret_timer, inet_frag_secret_rebuild, (unsigned long)f); f->secret_timer.expires = jiffies + f->secret_interval; -- 2.7.4