Release 4.8 net/sched/cls_rsvp.h

/*
 * net/sched/cls_rsvp.h Template file for RSVPv[46] classifiers.
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 *
 * 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_head			rcu;
};



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
48
85.71%
1
33.33%
al viro
al viro
5
8.93%
1
33.33%
eric dumazet
eric dumazet
3
5.36%
1
33.33%
Total
56
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
42
84.00%
1
33.33%
al viro
al viro
5
10.00%
1
33.33%
eric dumazet
eric dumazet
3
6.00%
1
33.33%
Total
50
100.00%
3
100.00%


#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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
536
86.31%
3
23.08%
changli gao
changli gao
44
7.09%
1
7.69%
john fastabend
john fastabend
26
4.19%
1
7.69%
arnaldo carvalho de melo
arnaldo carvalho de melo
6
0.97%
2
15.38%
eric dumazet
eric dumazet
2
0.32%
2
15.38%
paul gortmaker
paul gortmaker
2
0.32%
1
7.69%
joe perches
joe perches
2
0.32%
1
7.69%
thomas graf
thomas graf
2
0.32%
1
7.69%
al viro
al viro
1
0.16%
1
7.69%
Total
621
100.00%
13
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
john fastabend
john fastabend
169
100.00%
1
100.00%
Total
169
100.00%
1
100.00%



static unsigned long 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 0;

	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 (unsigned long)f;
		}
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
116
84.06%
1
33.33%
john fastabend
john fastabend
20
14.49%
1
33.33%
eric dumazet
eric dumazet
2
1.45%
1
33.33%
Total
138
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
46
90.20%
1
33.33%
john fastabend
john fastabend
4
7.84%
1
33.33%
panagiotis issaris*
panagiotis issaris*
1
1.96%
1
33.33%
Total
51
100.00%
3
100.00%



static void rsvp_delete_filter_rcu(struct rcu_head *head)
{
	struct rsvp_filter *f = container_of(head, struct rsvp_filter, rcu);

	tcf_exts_destroy(&f->exts);
	kfree(f);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
alexei starovoitov
alexei starovoitov
37
94.87%
1
50.00%
thomas graf
thomas graf
2
5.13%
1
50.00%
Total
39
100.00%
2
100.00%



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
         */
	call_rcu(&f->rcu, rsvp_delete_filter_rcu);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas graf
thomas graf
30
81.08%
1
33.33%
alexei starovoitov
alexei starovoitov
6
16.22%
1
33.33%
john fastabend
john fastabend
1
2.70%
1
33.33%
Total
37
100.00%
3
100.00%



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

	if (data == NULL)
		return true;

	if (!force) {
		for (h1 = 0; h1 < 256; h1++) {
			if (rcu_access_pointer(data->ht[h1]))
				return false;
		}
	}

	RCU_INIT_POINTER(tp->root, NULL);

	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);
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
134
61.47%
1
20.00%
cong wang
cong wang
47
21.56%
1
20.00%
john fastabend
john fastabend
34
15.60%
1
20.00%
thomas graf
thomas graf
3
1.38%
2
40.00%
Total
218
100.00%
5
100.00%



static int rsvp_delete(struct tcf_proto *tp, unsigned long arg)
{
	struct rsvp_head *head = rtnl_dereference(tp->root);
	struct rsvp_filter *nfp, *f = (struct rsvp_filter *)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;

	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])
					return 0;

			/* 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);
					return 0;
				}
			}

			return 0;
		}
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
177
70.52%
3
50.00%
john fastabend
john fastabend
72
28.69%
1
16.67%
eric dumazet
eric dumazet
1
0.40%
1
16.67%
thomas graf
thomas graf
1
0.40%
1
16.67%
Total
251
100.00%
6
100.00%



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) == 0)
			return h;
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
83
95.40%
1
33.33%
john fastabend
john fastabend
3
3.45%
1
33.33%
eric dumazet
eric dumazet
1
1.15%
1
33.33%
Total
87
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
59
100.00%
1
100.00%
Total
59
100.00%
1
100.00%



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));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
164
92.66%
1
50.00%
john fastabend
john fastabend
13
7.34%
1
50.00%
Total
177
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
81
100.00%
1
100.00%
Total
81
100.00%
1
100.00%


static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = {
	[TCA_RSVP_CLASSID]	= { .type = NLA_U32 },
	[TCA_RSVP_DST]		= { .type = NLA_BINARY,
				    .len = RSVP_DST_LEN * sizeof(u32) },
	[TCA_RSVP_SRC]		= { .type = NLA_BINARY,
				    .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,
		       unsigned long *arg, bool ovr)
{
	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(tb, TCA_RSVP_MAX, opt, rsvp_policy);
	if (err < 0)
		return err;

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

	f = (struct rsvp_filter *)*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;
		}

		tcf_exts_init(&n->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);

		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(tp, &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;

	tcf_exts_init(&f->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);
	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(tp, &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 = (unsigned long)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:
	kfree(f);
errout2:
	tcf_exts_destroy(&e);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
786
72.51%
6
25.00%
john fastabend
john fastabend
144
13.28%
2
8.33%
thomas graf
thomas graf
77
7.10%
2
8.33%
americo wang
americo wang
22
2.03%
2
8.33%
patrick mchardy
patrick mchardy
20
1.85%
4
16.67%
jamal hadi salim
jamal hadi salim
8
0.74%
1
4.17%
benjamin lahaise
benjamin lahaise
7
0.65%
1
4.17%
eric w. biederman
eric w. biederman
5
0.46%
1
4.17%
eric dumazet
eric dumazet
5
0.46%
1
4.17%
cong wang
cong wang
5
0.46%
1
4.17%
joe perches
joe perches
2
0.18%
1
4.17%
panagiotis issaris*
panagiotis issaris*
2
0.18%
1
4.17%
al viro
al viro
1
0.09%
1
4.17%
Total
1084
100.00%
24
100.00%



static void rsvp_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
	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, (unsigned long)f, arg) < 0) {
						arg->stop = 1;
						return;
					}
					arg->count++;
				}
			}
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
169
90.86%
1
25.00%
john fastabend
john fastabend
15
8.06%
1
25.00%
thomas graf
thomas graf
1
0.54%
1
25.00%
eric dumazet
eric dumazet
1
0.54%
1
25.00%
Total
186
100.00%
4
100.00%



static int rsvp_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
		     struct sk_buff *skb, struct tcmsg *t)
{
	struct rsvp_filter *f = (struct rsvp_filter *)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(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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
241
77.99%
3
25.00%
david s. miller
david s. miller
26
8.41%
1
8.33%
patrick mchardy
patrick mchardy
25
8.09%
3
25.00%
thomas graf
thomas graf
8
2.59%
2
16.67%
americo wang
americo wang
5
1.62%
1
8.33%
arnaldo carvalho de melo
arnaldo carvalho de melo
2
0.65%
1
8.33%
jiri pirko
jiri pirko
2
0.65%
1
8.33%
Total
309
100.00%
12
100.00%


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,
	.owner		=	THIS_MODULE,
};



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
13
81.25%
1
50.00%
al viro
al viro
3
18.75%
1
50.00%
Total
16
100.00%
2
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
12
80.00%
1
50.00%
al viro
al viro
3
20.00%
1
50.00%
Total
15
100.00%
2
100.00%

module_init(init_rsvp)
module_exit(exit_rsvp)
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
2835
72.36%
7
15.91%
john fastabend
john fastabend
517
13.20%
2
4.55%
patrick mchardy
patrick mchardy
127
3.24%
7
15.91%
thomas graf
thomas graf
127
3.24%
4
9.09%
david s. miller
david s. miller
59
1.51%
2
4.55%
cong wang
cong wang
52
1.33%
2
4.55%
changli gao
changli gao
44
1.12%
1
2.27%
alexei starovoitov
alexei starovoitov
43
1.10%
1
2.27%
al viro
al viro
29
0.74%
2
4.55%
americo wang
americo wang
27
0.69%
3
6.82%
eric dumazet
eric dumazet
18
0.46%
2
4.55%
jamal hadi salim
jamal hadi salim
8
0.20%
1
2.27%
arnaldo carvalho de melo
arnaldo carvalho de melo
8
0.20%
3
6.82%
benjamin lahaise
benjamin lahaise
7
0.18%
1
2.27%
eric w. biederman
eric w. biederman
5
0.13%
1
2.27%
joe perches
joe perches
4
0.10%
1
2.27%
panagiotis issaris*
panagiotis issaris*
3
0.08%
1
2.27%
jiri pirko
jiri pirko
2
0.05%
1
2.27%
paul gortmaker
paul gortmaker
2
0.05%
1
2.27%
igor maravic
igor maravic
1
0.03%
1
2.27%
Total
3918
100.00%
44
100.00%
  
Directory: net/sched

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.