Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 52db882f authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

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: default avatarDaniel Borkmann <dborkman@redhat.com>
Acked-by: default avatarVlad Yasevich <vyasevich@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d36f82b2

include/net/sctp/sctp.h

+0 −18
Original line number Diff line number Diff line
@@ -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;

include/net/sctp/structs.h

+3 −3
Original line number Diff line number Diff line
@@ -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.]

net/sctp/associola.c

+1 −7
Original line number Diff line number Diff line
@@ -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;

net/sctp/sm_make_chunk.c

+8 −11
Original line number Diff line number Diff line
@@ -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:

net/sctp/socket.c

+3 −11
Original line number Diff line number Diff line
@@ -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 ++;