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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2019-06-12 15:05:50 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2019-06-25 16:42:42 +0200 |
| commit | 21c6bb547d0d46a6ce36b7e1026b62548c6acfc1 (patch) | |
| tree | bce4d65b9f48ec337f92172572767c25f43a3416 /src/ratelimiter.c | |
| parent | compat: unify custom function prefix/suffix (diff) | |
| download | wireguard-monolithic-historical-21c6bb547d0d46a6ce36b7e1026b62548c6acfc1.tar.xz wireguard-monolithic-historical-21c6bb547d0d46a6ce36b7e1026b62548c6acfc1.zip | |
global: switch to coarse ktime
Coarse ktime is broken until [1] in 5.2 and kernels without the
backport, so we use fallback code there.
The fallback code has also been improved significantly. It now only uses
slower clocks on kernels < 3.17, at the expense of some accuracy we're
not overly concerned about.
[1] https://lore.kernel.org/lkml/tip-e3ff9c3678b4d80e22d2557b68726174578eaf52@git.kernel.org/
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'src/ratelimiter.c')
| -rw-r--r-- | src/ratelimiter.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/ratelimiter.c b/src/ratelimiter.c index fd09190..e33ec72 100644 --- a/src/ratelimiter.c +++ b/src/ratelimiter.c @@ -66,7 +66,7 @@ static void entry_uninit(struct ratelimiter_entry *entry) /* Calling this function with a NULL work uninits all entries. */ static void wg_ratelimiter_gc_entries(struct work_struct *work) { - const u64 now = ktime_get_boot_fast_ns(); + const u64 now = ktime_get_coarse_boottime_ns(); struct ratelimiter_entry *entry; struct hlist_node *temp; unsigned int i; @@ -130,7 +130,7 @@ bool wg_ratelimiter_allow(struct sk_buff *skb, struct net *net) * as part of the rate. */ spin_lock(&entry->lock); - now = ktime_get_boot_fast_ns(); + now = ktime_get_coarse_boottime_ns(); tokens = min_t(u64, TOKEN_MAX, entry->tokens + now - entry->last_time_ns); @@ -155,7 +155,7 @@ bool wg_ratelimiter_allow(struct sk_buff *skb, struct net *net) entry->ip = ip; INIT_HLIST_NODE(&entry->hash); spin_lock_init(&entry->lock); - entry->last_time_ns = ktime_get_boot_fast_ns(); + entry->last_time_ns = ktime_get_coarse_boottime_ns(); entry->tokens = TOKEN_MAX - PACKET_COST; spin_lock(&table_lock); hlist_add_head_rcu(&entry->hash, bucket); |