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Message-Id: <1372177050-17829-4-git-send-email-dborkman@redhat.com>
Date: Tue, 25 Jun 2013 18:17:27 +0200
From: Daniel Borkmann <dborkman@...hat.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-sctp@...r.kernel.org
Subject: [PATCH net-next v3 3/6] net: sctp: migrate cookie life from timeval to ktime
Currently, SCTP code defines its own timeval functions (since timeval
is rarely used inside the kernel by others), namely tv_lt() and
TIMEVAL_ADD() macros, that operate on SCTP cookie expiration.
We might as well remove all those, and operate directly on ktime
structures for a couple of reasons: ktime is available on all archs;
complexity of ktime calculations depending on the arch is less than
(reduces to a simple arithmetic operations on archs with
BITS_PER_LONG == 64 or CONFIG_KTIME_SCALAR) or equal to timeval
functions (other archs); code becomes more readable; macros can be
thrown out.
Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
---
include/net/sctp/sctp.h | 18 ------------------
include/net/sctp/structs.h | 6 +++---
net/sctp/associola.c | 8 +-------
net/sctp/sm_make_chunk.c | 19 ++++++++-----------
net/sctp/socket.c | 14 +++-----------
5 files changed, 15 insertions(+), 50 deletions(-)
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 15214a8..e6b95bc 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -560,24 +560,6 @@ for (pos = chunk->subh.fwdtsn_hdr->skip;\
/* Round an int up to the next multiple of 4. */
#define WORD_ROUND(s) (((s)+3)&~3)
-/* Compare two timevals. */
-#define tv_lt(s, t) \
- (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
-
-/* Add tv1 to tv2. */
-#define TIMEVAL_ADD(tv1, tv2) \
-({ \
- suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
- time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
-\
- if (usecs >= 1000000) { \
- usecs -= 1000000; \
- secs++; \
- } \
- (tv2).tv_sec = secs; \
- (tv2).tv_usec = usecs; \
-})
-
/* External references. */
extern struct proto sctp_prot;
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 1bd4c41..e745c92 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -54,7 +54,7 @@
#ifndef __sctp_structs_h__
#define __sctp_structs_h__
-#include <linux/time.h> /* We get struct timespec. */
+#include <linux/ktime.h>
#include <linux/socket.h> /* linux/in.h needs this!! */
#include <linux/in.h> /* We get struct sockaddr_in. */
#include <linux/in6.h> /* We get struct in6_addr */
@@ -284,7 +284,7 @@ struct sctp_cookie {
__u32 peer_ttag;
/* When does this cookie expire? */
- struct timeval expiration;
+ ktime_t expiration;
/* Number of inbound/outbound streams which are set
* and negotiated during the INIT process.
@@ -1537,7 +1537,7 @@ struct sctp_association {
sctp_state_t state;
/* The cookie life I award for any cookie. */
- struct timeval cookie_life;
+ ktime_t cookie_life;
/* Overall : The overall association error count.
* Error Count : [Clear this any time I get something.]
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index bf6e6bd..9a383a8 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -102,13 +102,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
sctp_bind_addr_init(&asoc->base.bind_addr, ep->base.bind_addr.port);
asoc->state = SCTP_STATE_CLOSED;
-
- /* Set these values from the socket values, a conversion between
- * millsecons to seconds/microseconds must also be done.
- */
- asoc->cookie_life.tv_sec = sp->assocparams.sasoc_cookie_life / 1000;
- asoc->cookie_life.tv_usec = (sp->assocparams.sasoc_cookie_life % 1000)
- * 1000;
+ asoc->cookie_life = ms_to_ktime(sp->assocparams.sasoc_cookie_life);
asoc->frag_point = 0;
asoc->user_frag = sp->user_frag;
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index fc85487..dd71f1f 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1630,8 +1630,8 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
cookie->c.adaptation_ind = asoc->peer.adaptation_ind;
/* Set an expiration time for the cookie. */
- do_gettimeofday(&cookie->c.expiration);
- TIMEVAL_ADD(asoc->cookie_life, cookie->c.expiration);
+ cookie->c.expiration = ktime_add(asoc->cookie_life,
+ ktime_get());
/* Copy the peer's init packet. */
memcpy(&cookie->c.peer_init[0], init_chunk->chunk_hdr,
@@ -1680,7 +1680,7 @@ struct sctp_association *sctp_unpack_cookie(
unsigned int len;
sctp_scope_t scope;
struct sk_buff *skb = chunk->skb;
- struct timeval tv;
+ ktime_t kt;
struct hash_desc desc;
/* Header size is static data prior to the actual cookie, including
@@ -1757,11 +1757,11 @@ no_hmac:
* down the new association establishment instead of every packet.
*/
if (sock_flag(ep->base.sk, SOCK_TIMESTAMP))
- skb_get_timestamp(skb, &tv);
+ kt = skb_get_ktime(skb);
else
- do_gettimeofday(&tv);
+ kt = ktime_get();
- if (!asoc && tv_lt(bear_cookie->expiration, tv)) {
+ if (!asoc && ktime_compare(bear_cookie->expiration, kt) < 0) {
/*
* Section 3.3.10.3 Stale Cookie Error (3)
*
@@ -1773,9 +1773,7 @@ no_hmac:
len = ntohs(chunk->chunk_hdr->length);
*errp = sctp_make_op_error_space(asoc, chunk, len);
if (*errp) {
- suseconds_t usecs = (tv.tv_sec -
- bear_cookie->expiration.tv_sec) * 1000000L +
- tv.tv_usec - bear_cookie->expiration.tv_usec;
+ suseconds_t usecs = ktime_to_us(ktime_sub(kt, bear_cookie->expiration));
__be32 n = htonl(usecs);
sctp_init_cause(*errp, SCTP_ERROR_STALE_COOKIE,
@@ -2514,8 +2512,7 @@ do_addr_param:
/* Suggested Cookie Life span increment's unit is msec,
* (1/1000sec).
*/
- asoc->cookie_life.tv_sec += stale / 1000;
- asoc->cookie_life.tv_usec += (stale % 1000) * 1000;
+ asoc->cookie_life = ktime_add_ms(asoc->cookie_life, stale);
break;
case SCTP_PARAM_HOST_NAME_ADDRESS:
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 32db19b..4c47e55 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2910,13 +2910,8 @@ static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsig
asoc->max_retrans = assocparams.sasoc_asocmaxrxt;
}
- if (assocparams.sasoc_cookie_life != 0) {
- asoc->cookie_life.tv_sec =
- assocparams.sasoc_cookie_life / 1000;
- asoc->cookie_life.tv_usec =
- (assocparams.sasoc_cookie_life % 1000)
- * 1000;
- }
+ if (assocparams.sasoc_cookie_life != 0)
+ asoc->cookie_life = ms_to_ktime(assocparams.sasoc_cookie_life);
} else {
/* Set the values to the endpoint */
struct sctp_sock *sp = sctp_sk(sk);
@@ -5074,10 +5069,7 @@ static int sctp_getsockopt_associnfo(struct sock *sk, int len,
assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
assocparams.sasoc_local_rwnd = asoc->a_rwnd;
- assocparams.sasoc_cookie_life = (asoc->cookie_life.tv_sec
- * 1000) +
- (asoc->cookie_life.tv_usec
- / 1000);
+ assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
list_for_each(pos, &asoc->peer.transport_addr_list) {
cnt ++;
--
1.7.11.7
--
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