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net: sctp: migrate cookie life from timeval to ktime

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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@redhat.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2013-06-25 18:17:27 +02:00 committed by David S. Miller
parent d36f82b243
commit 52db882f3f
5 changed files with 15 additions and 50 deletions
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18
include/net/sctp/sctp.h
View File

@ -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;

6
include/net/sctp/structs.h
View File

@ -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.]

8
net/sctp/associola.c
View File

@ -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;

19
net/sctp/sm_make_chunk.c
View File

@ -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:

14
net/sctp/socket.c
View File

@ -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 ++;