!2323 net/sched: Retire rsvp classifier (9fa07154) · Commits · EulixOS / Software / Kernel

net/sched/Kconfig

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Original line number	Diff line number	Diff line
		@@ -548,34 +548,6 @@ config CLS_U32_MARK
		help
		Say Y here to be able to use netfilter marks as u32 key.

		config NET_CLS_RSVP
		tristate "IPv4 Resource Reservation Protocol (RSVP)"
		select NET_CLS
		help
		The Resource Reservation Protocol (RSVP) permits end systems to
		request a minimum and maximum data flow rate for a connection; this
		is important for real time data such as streaming sound or video.

		Say Y here if you want to be able to classify outgoing packets based
		on their RSVP requests.

		To compile this code as a module, choose M here: the
		module will be called cls_rsvp.

		config NET_CLS_RSVP6
		tristate "IPv6 Resource Reservation Protocol (RSVP6)"
		select NET_CLS
		help
		The Resource Reservation Protocol (RSVP) permits end systems to
		request a minimum and maximum data flow rate for a connection; this
		is important for real time data such as streaming sound or video.

		Say Y here if you want to be able to classify outgoing packets based
		on their RSVP requests and you are using the IPv6 protocol.

		To compile this code as a module, choose M here: the
		module will be called cls_rsvp6.

		config NET_CLS_FLOW
		tristate "Flow classifier"
		select NET_CLS

net/sched/Makefile

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Original line number	Diff line number	Diff line
		@@ -68,8 +68,6 @@ obj-$(CONFIG_NET_SCH_TAPRIO) += sch_taprio.o
		obj-$(CONFIG_NET_CLS_U32) += cls_u32.o
		obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o
		obj-$(CONFIG_NET_CLS_FW) += cls_fw.o
		obj-$(CONFIG_NET_CLS_RSVP) += cls_rsvp.o
		obj-$(CONFIG_NET_CLS_RSVP6) += cls_rsvp6.o
		obj-$(CONFIG_NET_CLS_BASIC) += cls_basic.o
		obj-$(CONFIG_NET_CLS_FLOW) += cls_flow.o
		obj-$(CONFIG_NET_CLS_CGROUP) += cls_cgroup.o

net/sched/cls_rsvp.c

deleted100644 → 0

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Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* net/sched/cls_rsvp.c Special RSVP packet classifier for IPv4.
		*
		* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
		*/

		#include <linux/module.h>
		#include <linux/types.h>
		#include <linux/kernel.h>
		#include <linux/string.h>
		#include <linux/errno.h>
		#include <linux/skbuff.h>
		#include <net/ip.h>
		#include <net/netlink.h>
		#include <net/act_api.h>
		#include <net/pkt_cls.h>

		#define RSVP_DST_LEN 1
		#define RSVP_ID "rsvp"
		#define RSVP_OPS cls_rsvp_ops

		#include "cls_rsvp.h"
		MODULE_LICENSE("GPL");

net/sched/cls_rsvp.h

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-or-later */
		/*
		* net/sched/cls_rsvp.h Template file for RSVPv[46] classifiers.
		*
		* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
		*/

		/*
		Comparing to general packet classification problem,
		RSVP needs only sevaral relatively simple rules:

		* (dst, protocol) are always specified,
		so that we are able to hash them.
		* src may be exact, or may be wildcard, so that
		we can keep a hash table plus one wildcard entry.
		* source port (or flow label) is important only if src is given.

		IMPLEMENTATION.

		We use a two level hash table: The top level is keyed by
		destination address and protocol ID, every bucket contains a list
		of "rsvp sessions", identified by destination address, protocol and
		DPI(="Destination Port ID"): triple (key, mask, offset).

		Every bucket has a smaller hash table keyed by source address
		(cf. RSVP flowspec) and one wildcard entry for wildcard reservations.
		Every bucket is again a list of "RSVP flows", selected by
		source address and SPI(="Source Port ID" here rather than
		"security parameter index"): triple (key, mask, offset).


		NOTE 1. All the packets with IPv6 extension headers (but AH and ESP)
		and all fragmented packets go to the best-effort traffic class.


		NOTE 2. Two "port id"'s seems to be redundant, rfc2207 requires
		only one "Generalized Port Identifier". So that for classic
		ah, esp (and udp,tcp) both *pi should coincide or one of them
		should be wildcard.

		At first sight, this redundancy is just a waste of CPU
		resources. But DPI and SPI add the possibility to assign different
		priorities to GPIs. Look also at note 4 about tunnels below.


		NOTE 3. One complication is the case of tunneled packets.
		We implement it as following: if the first lookup
		matches a special session with "tunnelhdr" value not zero,
		flowid doesn't contain the true flow ID, but the tunnel ID (1...255).
		In this case, we pull tunnelhdr bytes and restart lookup
		with tunnel ID added to the list of keys. Simple and stupid 8)8)
		It's enough for PIMREG and IPIP.


		NOTE 4. Two GPIs make it possible to parse even GRE packets.
		F.e. DPI can select ETH_P_IP (and necessary flags to make
		tunnelhdr correct) in GRE protocol field and SPI matches
		GRE key. Is it not nice? 8)8)


		Well, as result, despite its simplicity, we get a pretty
		powerful classification engine. */


		struct rsvp_head {
		u32 tmap[256/32];
		u32 hgenerator;
		u8 tgenerator;
		struct rsvp_session __rcu *ht[256];
		struct rcu_head rcu;
		};

		struct rsvp_session {
		struct rsvp_session __rcu *next;
		__be32 dst[RSVP_DST_LEN];
		struct tc_rsvp_gpi dpi;
		u8 protocol;
		u8 tunnelid;
		/* 16 (src,sport) hash slots, and one wildcard source slot */
		struct rsvp_filter __rcu *ht[16 + 1];
		struct rcu_head rcu;
		};


		struct rsvp_filter {
		struct rsvp_filter __rcu *next;
		__be32 src[RSVP_DST_LEN];
		struct tc_rsvp_gpi spi;
		u8 tunnelhdr;

		struct tcf_result res;
		struct tcf_exts exts;

		u32 handle;
		struct rsvp_session *sess;
		struct rcu_work rwork;
		};

		static inline unsigned int hash_dst(__be32 *dst, u8 protocol, u8 tunnelid)
		{
		unsigned int h = (__force __u32)dst[RSVP_DST_LEN - 1];

		h ^= h>>16;
		h ^= h>>8;
		return (h ^ protocol ^ tunnelid) & 0xFF;
		}

		static inline unsigned int hash_src(__be32 *src)
		{
		unsigned int h = (__force __u32)src[RSVP_DST_LEN-1];

		h ^= h>>16;
		h ^= h>>8;
		h ^= h>>4;
		return h & 0xF;
		}

		#define RSVP_APPLY_RESULT() \
		{ \
		int r = tcf_exts_exec(skb, &f->exts, res); \
		if (r < 0) \
		continue; \
		else if (r > 0) \
		return r; \
		}

		static int rsvp_classify(struct sk_buff skb, const struct tcf_proto tp,
		struct tcf_result *res)
		{
		struct rsvp_head *head = rcu_dereference_bh(tp->root);
		struct rsvp_session *s;
		struct rsvp_filter *f;
		unsigned int h1, h2;
		__be32 dst, src;
		u8 protocol;
		u8 tunnelid = 0;
		u8 *xprt;
		#if RSVP_DST_LEN == 4
		struct ipv6hdr *nhptr;

		if (!pskb_network_may_pull(skb, sizeof(*nhptr)))
		return -1;
		nhptr = ipv6_hdr(skb);
		#else
		struct iphdr *nhptr;

		if (!pskb_network_may_pull(skb, sizeof(*nhptr)))
		return -1;
		nhptr = ip_hdr(skb);
		#endif
		restart:

		#if RSVP_DST_LEN == 4
		src = &nhptr->saddr.s6_addr32[0];
		dst = &nhptr->daddr.s6_addr32[0];
		protocol = nhptr->nexthdr;
		xprt = ((u8 *)nhptr) + sizeof(struct ipv6hdr);
		#else
		src = &nhptr->saddr;
		dst = &nhptr->daddr;
		protocol = nhptr->protocol;
		xprt = ((u8 *)nhptr) + (nhptr->ihl<<2);
		if (ip_is_fragment(nhptr))
		return -1;
		#endif

		h1 = hash_dst(dst, protocol, tunnelid);
		h2 = hash_src(src);

		for (s = rcu_dereference_bh(head->ht[h1]); s;
		s = rcu_dereference_bh(s->next)) {
		if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN - 1] &&
		protocol == s->protocol &&
		!(s->dpi.mask &
		((u32 )(xprt + s->dpi.offset) ^ s->dpi.key)) &&
		#if RSVP_DST_LEN == 4
		dst[0] == s->dst[0] &&
		dst[1] == s->dst[1] &&
		dst[2] == s->dst[2] &&
		#endif
		tunnelid == s->tunnelid) {

		for (f = rcu_dereference_bh(s->ht[h2]); f;
		f = rcu_dereference_bh(f->next)) {
		if (src[RSVP_DST_LEN-1] == f->src[RSVP_DST_LEN - 1] &&
		!(f->spi.mask & ((u32 )(xprt + f->spi.offset) ^ f->spi.key))
		#if RSVP_DST_LEN == 4
		&&
		src[0] == f->src[0] &&
		src[1] == f->src[1] &&
		src[2] == f->src[2]
		#endif
		) {
		*res = f->res;
		RSVP_APPLY_RESULT();

		matched:
		if (f->tunnelhdr == 0)
		return 0;

		tunnelid = f->res.classid;
		nhptr = (void )(xprt + f->tunnelhdr - sizeof(nhptr));
		goto restart;
		}
		}

		/* And wildcard bucket... */
		for (f = rcu_dereference_bh(s->ht[16]); f;
		f = rcu_dereference_bh(f->next)) {
		*res = f->res;
		RSVP_APPLY_RESULT();
		goto matched;
		}
		return -1;
		}
		}
		return -1;
		}

		static void rsvp_replace(struct tcf_proto tp, struct rsvp_filter n, u32 h)
		{
		struct rsvp_head *head = rtnl_dereference(tp->root);
		struct rsvp_session *s;
		struct rsvp_filter __rcu **ins;
		struct rsvp_filter *pins;
		unsigned int h1 = h & 0xFF;
		unsigned int h2 = (h >> 8) & 0xFF;

		for (s = rtnl_dereference(head->ht[h1]); s;
		s = rtnl_dereference(s->next)) {
		for (ins = &s->ht[h2], pins = rtnl_dereference(*ins); ;
		ins = &pins->next, pins = rtnl_dereference(*ins)) {
		if (pins->handle == h) {
		RCU_INIT_POINTER(n->next, pins->next);
		rcu_assign_pointer(*ins, n);
		return;
		}
		}
		}

		/* Something went wrong if we are trying to replace a non-existant
		* node. Mind as well halt instead of silently failing.
		*/
		BUG_ON(1);
		}

		static void rsvp_get(struct tcf_proto tp, u32 handle)
		{
		struct rsvp_head *head = rtnl_dereference(tp->root);
		struct rsvp_session *s;
		struct rsvp_filter *f;
		unsigned int h1 = handle & 0xFF;
		unsigned int h2 = (handle >> 8) & 0xFF;

		if (h2 > 16)
		return NULL;

		for (s = rtnl_dereference(head->ht[h1]); s;
		s = rtnl_dereference(s->next)) {
		for (f = rtnl_dereference(s->ht[h2]); f;
		f = rtnl_dereference(f->next)) {
		if (f->handle == handle)
		return f;
		}
		}
		return NULL;
		}

		static int rsvp_init(struct tcf_proto *tp)
		{
		struct rsvp_head *data;

		data = kzalloc(sizeof(struct rsvp_head), GFP_KERNEL);
		if (data) {
		rcu_assign_pointer(tp->root, data);
		return 0;
		}
		return -ENOBUFS;
		}

		static void __rsvp_delete_filter(struct rsvp_filter *f)
		{
		tcf_exts_destroy(&f->exts);
		tcf_exts_put_net(&f->exts);
		kfree(f);
		}

		static void rsvp_delete_filter_work(struct work_struct *work)
		{
		struct rsvp_filter *f = container_of(to_rcu_work(work),
		struct rsvp_filter,
		rwork);
		rtnl_lock();
		__rsvp_delete_filter(f);
		rtnl_unlock();
		}

		static void rsvp_delete_filter(struct tcf_proto tp, struct rsvp_filter f)
		{
		tcf_unbind_filter(tp, &f->res);
		/* all classifiers are required to call tcf_exts_destroy() after rcu
		* grace period, since converted-to-rcu actions are relying on that
		* in cleanup() callback
		*/
		if (tcf_exts_get_net(&f->exts))
		tcf_queue_work(&f->rwork, rsvp_delete_filter_work);
		else
		__rsvp_delete_filter(f);
		}

		static void rsvp_destroy(struct tcf_proto *tp, bool rtnl_held,
		struct netlink_ext_ack *extack)
		{
		struct rsvp_head *data = rtnl_dereference(tp->root);
		int h1, h2;

		if (data == NULL)
		return;

		for (h1 = 0; h1 < 256; h1++) {
		struct rsvp_session *s;

		while ((s = rtnl_dereference(data->ht[h1])) != NULL) {
		RCU_INIT_POINTER(data->ht[h1], s->next);

		for (h2 = 0; h2 <= 16; h2++) {
		struct rsvp_filter *f;

		while ((f = rtnl_dereference(s->ht[h2])) != NULL) {
		rcu_assign_pointer(s->ht[h2], f->next);
		rsvp_delete_filter(tp, f);
		}
		}
		kfree_rcu(s, rcu);
		}
		}
		kfree_rcu(data, rcu);
		}

		static int rsvp_delete(struct tcf_proto tp, void arg, bool *last,
		bool rtnl_held, struct netlink_ext_ack *extack)
		{
		struct rsvp_head *head = rtnl_dereference(tp->root);
		struct rsvp_filter nfp, f = arg;
		struct rsvp_filter __rcu **fp;
		unsigned int h = f->handle;
		struct rsvp_session __rcu **sp;
		struct rsvp_session nsp, s = f->sess;
		int i, h1;

		fp = &s->ht[(h >> 8) & 0xFF];
		for (nfp = rtnl_dereference(*fp); nfp;
		fp = &nfp->next, nfp = rtnl_dereference(*fp)) {
		if (nfp == f) {
		RCU_INIT_POINTER(*fp, f->next);
		rsvp_delete_filter(tp, f);

		/* Strip tree */

		for (i = 0; i <= 16; i++)
		if (s->ht[i])
		goto out;

		/* OK, session has no flows */
		sp = &head->ht[h & 0xFF];
		for (nsp = rtnl_dereference(*sp); nsp;
		sp = &nsp->next, nsp = rtnl_dereference(*sp)) {
		if (nsp == s) {
		RCU_INIT_POINTER(*sp, s->next);
		kfree_rcu(s, rcu);
		goto out;
		}
		}

		break;
		}
		}

		out:
		*last = true;
		for (h1 = 0; h1 < 256; h1++) {
		if (rcu_access_pointer(head->ht[h1])) {
		*last = false;
		break;
		}
		}

		return 0;
		}

		static unsigned int gen_handle(struct tcf_proto *tp, unsigned salt)
		{
		struct rsvp_head *data = rtnl_dereference(tp->root);
		int i = 0xFFFF;

		while (i-- > 0) {
		u32 h;

		if ((data->hgenerator += 0x10000) == 0)
		data->hgenerator = 0x10000;
		h = data->hgenerator\|salt;
		if (!rsvp_get(tp, h))
		return h;
		}
		return 0;
		}

		static int tunnel_bts(struct rsvp_head *data)
		{
		int n = data->tgenerator >> 5;
		u32 b = 1 << (data->tgenerator & 0x1F);

		if (data->tmap[n] & b)
		return 0;
		data->tmap[n] \|= b;
		return 1;
		}

		static void tunnel_recycle(struct rsvp_head *data)
		{
		struct rsvp_session __rcu **sht = data->ht;
		u32 tmap[256/32];
		int h1, h2;

		memset(tmap, 0, sizeof(tmap));

		for (h1 = 0; h1 < 256; h1++) {
		struct rsvp_session *s;
		for (s = rtnl_dereference(sht[h1]); s;
		s = rtnl_dereference(s->next)) {
		for (h2 = 0; h2 <= 16; h2++) {
		struct rsvp_filter *f;

		for (f = rtnl_dereference(s->ht[h2]); f;
		f = rtnl_dereference(f->next)) {
		if (f->tunnelhdr == 0)
		continue;
		data->tgenerator = f->res.classid;
		tunnel_bts(data);
		}
		}
		}
		}

		memcpy(data->tmap, tmap, sizeof(tmap));
		}

		static u32 gen_tunnel(struct rsvp_head *data)
		{
		int i, k;

		for (k = 0; k < 2; k++) {
		for (i = 255; i > 0; i--) {
		if (++data->tgenerator == 0)
		data->tgenerator = 1;
		if (tunnel_bts(data))
		return data->tgenerator;
		}
		tunnel_recycle(data);
		}
		return 0;
		}

		static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = {
		[TCA_RSVP_CLASSID] = { .type = NLA_U32 },
		[TCA_RSVP_DST] = { .len = RSVP_DST_LEN * sizeof(u32) },
		[TCA_RSVP_SRC] = { .len = RSVP_DST_LEN * sizeof(u32) },
		[TCA_RSVP_PINFO] = { .len = sizeof(struct tc_rsvp_pinfo) },
		};

		static int rsvp_change(struct net net, struct sk_buff in_skb,
		struct tcf_proto *tp, unsigned long base,
		u32 handle,
		struct nlattr **tca,
		void **arg, bool ovr, bool rtnl_held,
		struct netlink_ext_ack *extack)
		{
		struct rsvp_head *data = rtnl_dereference(tp->root);
		struct rsvp_filter f, nfp;
		struct rsvp_filter __rcu **fp;
		struct rsvp_session nsp, s;
		struct rsvp_session __rcu **sp;
		struct tc_rsvp_pinfo *pinfo = NULL;
		struct nlattr *opt = tca[TCA_OPTIONS];
		struct nlattr *tb[TCA_RSVP_MAX + 1];
		struct tcf_exts e;
		unsigned int h1, h2;
		__be32 *dst;
		int err;

		if (opt == NULL)
		return handle ? -EINVAL : 0;

		err = nla_parse_nested_deprecated(tb, TCA_RSVP_MAX, opt, rsvp_policy,
		NULL);
		if (err < 0)
		return err;

		err = tcf_exts_init(&e, net, TCA_RSVP_ACT, TCA_RSVP_POLICE);
		if (err < 0)
		return err;
		err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr, true,
		extack);
		if (err < 0)
		goto errout2;

		f = *arg;
		if (f) {
		/* Node exists: adjust only classid */
		struct rsvp_filter *n;

		if (f->handle != handle && handle)
		goto errout2;

		n = kmemdup(f, sizeof(*f), GFP_KERNEL);
		if (!n) {
		err = -ENOMEM;
		goto errout2;
		}

		err = tcf_exts_init(&n->exts, net, TCA_RSVP_ACT,
		TCA_RSVP_POLICE);
		if (err < 0) {
		kfree(n);
		goto errout2;
		}

		if (tb[TCA_RSVP_CLASSID]) {
		n->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID]);
		tcf_bind_filter(tp, &n->res, base);
		}

		tcf_exts_change(&n->exts, &e);
		rsvp_replace(tp, n, handle);
		return 0;
		}

		/* Now more serious part... */
		err = -EINVAL;
		if (handle)
		goto errout2;
		if (tb[TCA_RSVP_DST] == NULL)
		goto errout2;

		err = -ENOBUFS;
		f = kzalloc(sizeof(struct rsvp_filter), GFP_KERNEL);
		if (f == NULL)
		goto errout2;

		err = tcf_exts_init(&f->exts, net, TCA_RSVP_ACT, TCA_RSVP_POLICE);
		if (err < 0)
		goto errout;
		h2 = 16;
		if (tb[TCA_RSVP_SRC]) {
		memcpy(f->src, nla_data(tb[TCA_RSVP_SRC]), sizeof(f->src));
		h2 = hash_src(f->src);
		}
		if (tb[TCA_RSVP_PINFO]) {
		pinfo = nla_data(tb[TCA_RSVP_PINFO]);
		f->spi = pinfo->spi;
		f->tunnelhdr = pinfo->tunnelhdr;
		}
		if (tb[TCA_RSVP_CLASSID])
		f->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID]);

		dst = nla_data(tb[TCA_RSVP_DST]);
		h1 = hash_dst(dst, pinfo ? pinfo->protocol : 0, pinfo ? pinfo->tunnelid : 0);

		err = -ENOMEM;
		if ((f->handle = gen_handle(tp, h1 \| (h2<<8))) == 0)
		goto errout;

		if (f->tunnelhdr) {
		err = -EINVAL;
		if (f->res.classid > 255)
		goto errout;

		err = -ENOMEM;
		if (f->res.classid == 0 &&
		(f->res.classid = gen_tunnel(data)) == 0)
		goto errout;
		}

		for (sp = &data->ht[h1];
		(s = rtnl_dereference(*sp)) != NULL;
		sp = &s->next) {
		if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN-1] &&
		pinfo && pinfo->protocol == s->protocol &&
		memcmp(&pinfo->dpi, &s->dpi, sizeof(s->dpi)) == 0 &&
		#if RSVP_DST_LEN == 4
		dst[0] == s->dst[0] &&
		dst[1] == s->dst[1] &&
		dst[2] == s->dst[2] &&
		#endif
		pinfo->tunnelid == s->tunnelid) {

		insert:
		/* OK, we found appropriate session */

		fp = &s->ht[h2];

		f->sess = s;
		if (f->tunnelhdr == 0)
		tcf_bind_filter(tp, &f->res, base);

		tcf_exts_change(&f->exts, &e);

		fp = &s->ht[h2];
		for (nfp = rtnl_dereference(*fp); nfp;
		fp = &nfp->next, nfp = rtnl_dereference(*fp)) {
		__u32 mask = nfp->spi.mask & f->spi.mask;

		if (mask != f->spi.mask)
		break;
		}
		RCU_INIT_POINTER(f->next, nfp);
		rcu_assign_pointer(*fp, f);

		*arg = f;
		return 0;
		}
		}

		/* No session found. Create new one. */

		err = -ENOBUFS;
		s = kzalloc(sizeof(struct rsvp_session), GFP_KERNEL);
		if (s == NULL)
		goto errout;
		memcpy(s->dst, dst, sizeof(s->dst));

		if (pinfo) {
		s->dpi = pinfo->dpi;
		s->protocol = pinfo->protocol;
		s->tunnelid = pinfo->tunnelid;
		}
		sp = &data->ht[h1];
		for (nsp = rtnl_dereference(*sp); nsp;
		sp = &nsp->next, nsp = rtnl_dereference(*sp)) {
		if ((nsp->dpi.mask & s->dpi.mask) != s->dpi.mask)
		break;
		}
		RCU_INIT_POINTER(s->next, nsp);
		rcu_assign_pointer(*sp, s);

		goto insert;

		errout:
		tcf_exts_destroy(&f->exts);
		kfree(f);
		errout2:
		tcf_exts_destroy(&e);
		return err;
		}

		static void rsvp_walk(struct tcf_proto tp, struct tcf_walker arg,
		bool rtnl_held)
		{
		struct rsvp_head *head = rtnl_dereference(tp->root);
		unsigned int h, h1;

		if (arg->stop)
		return;

		for (h = 0; h < 256; h++) {
		struct rsvp_session *s;

		for (s = rtnl_dereference(head->ht[h]); s;
		s = rtnl_dereference(s->next)) {
		for (h1 = 0; h1 <= 16; h1++) {
		struct rsvp_filter *f;

		for (f = rtnl_dereference(s->ht[h1]); f;
		f = rtnl_dereference(f->next)) {
		if (arg->count < arg->skip) {
		arg->count++;
		continue;
		}
		if (arg->fn(tp, f, arg) < 0) {
		arg->stop = 1;
		return;
		}
		arg->count++;
		}
		}
		}
		}
		}

		static int rsvp_dump(struct net net, struct tcf_proto tp, void *fh,
		struct sk_buff skb, struct tcmsg t, bool rtnl_held)
		{
		struct rsvp_filter *f = fh;
		struct rsvp_session *s;
		struct nlattr *nest;
		struct tc_rsvp_pinfo pinfo;

		if (f == NULL)
		return skb->len;
		s = f->sess;

		t->tcm_handle = f->handle;

		nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
		if (nest == NULL)
		goto nla_put_failure;

		if (nla_put(skb, TCA_RSVP_DST, sizeof(s->dst), &s->dst))
		goto nla_put_failure;
		pinfo.dpi = s->dpi;
		pinfo.spi = f->spi;
		pinfo.protocol = s->protocol;
		pinfo.tunnelid = s->tunnelid;
		pinfo.tunnelhdr = f->tunnelhdr;
		pinfo.pad = 0;
		if (nla_put(skb, TCA_RSVP_PINFO, sizeof(pinfo), &pinfo))
		goto nla_put_failure;
		if (f->res.classid &&
		nla_put_u32(skb, TCA_RSVP_CLASSID, f->res.classid))
		goto nla_put_failure;
		if (((f->handle >> 8) & 0xFF) != 16 &&
		nla_put(skb, TCA_RSVP_SRC, sizeof(f->src), f->src))
		goto nla_put_failure;

		if (tcf_exts_dump(skb, &f->exts) < 0)
		goto nla_put_failure;

		nla_nest_end(skb, nest);

		if (tcf_exts_dump_stats(skb, &f->exts) < 0)
		goto nla_put_failure;
		return skb->len;

		nla_put_failure:
		nla_nest_cancel(skb, nest);
		return -1;
		}

		static void rsvp_bind_class(void fh, u32 classid, unsigned long cl, void q,
		unsigned long base)
		{
		struct rsvp_filter *f = fh;

		if (f && f->res.classid == classid) {
		if (cl)
		__tcf_bind_filter(q, &f->res, base);
		else
		__tcf_unbind_filter(q, &f->res);
		}
		}

		static struct tcf_proto_ops RSVP_OPS __read_mostly = {
		.kind = RSVP_ID,
		.classify = rsvp_classify,
		.init = rsvp_init,
		.destroy = rsvp_destroy,
		.get = rsvp_get,
		.change = rsvp_change,
		.delete = rsvp_delete,
		.walk = rsvp_walk,
		.dump = rsvp_dump,
		.bind_class = rsvp_bind_class,
		.owner = THIS_MODULE,
		};

		static int __init init_rsvp(void)
		{
		return register_tcf_proto_ops(&RSVP_OPS);
		}

		static void __exit exit_rsvp(void)
		{
		unregister_tcf_proto_ops(&RSVP_OPS);
		}

		module_init(init_rsvp)
		module_exit(exit_rsvp)

net/sched/cls_rsvp6.c

deleted100644 → 0

+0 −24

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* net/sched/cls_rsvp6.c Special RSVP packet classifier for IPv6.
		*
		* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
		*/

		#include <linux/module.h>
		#include <linux/types.h>
		#include <linux/kernel.h>
		#include <linux/string.h>
		#include <linux/errno.h>
		#include <linux/ipv6.h>
		#include <linux/skbuff.h>
		#include <net/act_api.h>
		#include <net/pkt_cls.h>
		#include <net/netlink.h>

		#define RSVP_DST_LEN 4
		#define RSVP_ID "rsvp6"
		#define RSVP_OPS cls_rsvp6_ops

		#include "cls_rsvp.h"
		MODULE_LICENSE("GPL");