aboutsummaryrefslogtreecommitdiff
path: root/net/sched/cls_route.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sched/cls_route.c')
-rw-r--r--net/sched/cls_route.c295
1 files changed, 144 insertions, 151 deletions
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index 520ff716dab..dd9fc2523c7 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -10,61 +10,43 @@
*/
#include <linux/module.h>
-#include <linux/config.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <linux/bitops.h>
+#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/in.h>
#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/if_ether.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/notifier.h>
-#include <net/ip.h>
-#include <net/route.h>
#include <linux/skbuff.h>
-#include <net/sock.h>
+#include <net/dst.h>
+#include <net/route.h>
+#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
/*
- 1. For now we assume that route tags < 256.
- It allows to use direct table lookups, instead of hash tables.
- 2. For now we assume that "from TAG" and "fromdev DEV" statements
- are mutually exclusive.
- 3. "to TAG from ANY" has higher priority, than "to ANY from XXX"
+ * 1. For now we assume that route tags < 256.
+ * It allows to use direct table lookups, instead of hash tables.
+ * 2. For now we assume that "from TAG" and "fromdev DEV" statements
+ * are mutually exclusive.
+ * 3. "to TAG from ANY" has higher priority, than "to ANY from XXX"
*/
-struct route4_fastmap
-{
+struct route4_fastmap {
struct route4_filter *filter;
u32 id;
int iif;
};
-struct route4_head
-{
+struct route4_head {
struct route4_fastmap fastmap[16];
- struct route4_bucket *table[256+1];
+ struct route4_bucket *table[256 + 1];
};
-struct route4_bucket
-{
+struct route4_bucket {
/* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */
- struct route4_filter *ht[16+16+1];
+ struct route4_filter *ht[16 + 16 + 1];
};
-struct route4_filter
-{
+struct route4_filter {
struct route4_filter *next;
u32 id;
int iif;
@@ -75,52 +57,50 @@ struct route4_filter
struct route4_bucket *bkt;
};
-#define ROUTE4_FAILURE ((struct route4_filter*)(-1L))
-
-static struct tcf_ext_map route_ext_map = {
- .police = TCA_ROUTE4_POLICE,
- .action = TCA_ROUTE4_ACT
-};
+#define ROUTE4_FAILURE ((struct route4_filter *)(-1L))
-static __inline__ int route4_fastmap_hash(u32 id, int iif)
+static inline int route4_fastmap_hash(u32 id, int iif)
{
- return id&0xF;
+ return id & 0xF;
}
-static inline
-void route4_reset_fastmap(struct net_device *dev, struct route4_head *head, u32 id)
+static void
+route4_reset_fastmap(struct Qdisc *q, struct route4_head *head, u32 id)
{
- spin_lock_bh(&dev->queue_lock);
+ spinlock_t *root_lock = qdisc_root_sleeping_lock(q);
+
+ spin_lock_bh(root_lock);
memset(head->fastmap, 0, sizeof(head->fastmap));
- spin_unlock_bh(&dev->queue_lock);
+ spin_unlock_bh(root_lock);
}
-static void __inline__
+static void
route4_set_fastmap(struct route4_head *head, u32 id, int iif,
struct route4_filter *f)
{
int h = route4_fastmap_hash(id, iif);
+
head->fastmap[h].id = id;
head->fastmap[h].iif = iif;
head->fastmap[h].filter = f;
}
-static __inline__ int route4_hash_to(u32 id)
+static inline int route4_hash_to(u32 id)
{
- return id&0xFF;
+ return id & 0xFF;
}
-static __inline__ int route4_hash_from(u32 id)
+static inline int route4_hash_from(u32 id)
{
- return (id>>16)&0xF;
+ return (id >> 16) & 0xF;
}
-static __inline__ int route4_hash_iif(int iif)
+static inline int route4_hash_iif(int iif)
{
- return 16 + ((iif>>16)&0xF);
+ return 16 + ((iif >> 16) & 0xF);
}
-static __inline__ int route4_hash_wild(void)
+static inline int route4_hash_wild(void)
{
return 32;
}
@@ -140,24 +120,25 @@ static __inline__ int route4_hash_wild(void)
return 0; \
}
-static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp,
+static int route4_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
- struct route4_head *head = (struct route4_head*)tp->root;
+ struct route4_head *head = tp->root;
struct dst_entry *dst;
struct route4_bucket *b;
struct route4_filter *f;
u32 id, h;
int iif, dont_cache = 0;
- if ((dst = skb->dst) == NULL)
+ dst = skb_dst(skb);
+ if (!dst)
goto failure;
id = dst->tclassid;
if (head == NULL)
goto old_method;
- iif = ((struct rtable*)dst)->fl.iif;
+ iif = inet_iif(skb);
h = route4_fastmap_hash(id, iif);
if (id == head->fastmap[h].id &&
@@ -173,7 +154,8 @@ static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp,
h = route4_hash_to(id);
restart:
- if ((b = head->table[h]) != NULL) {
+ b = head->table[h];
+ if (b) {
for (f = b->ht[route4_hash_from(id)]; f; f = f->next)
if (f->id == id)
ROUTE4_APPLY_RESULT();
@@ -209,8 +191,9 @@ old_method:
static inline u32 to_hash(u32 id)
{
- u32 h = id&0xFF;
- if (id&0x8000)
+ u32 h = id & 0xFF;
+
+ if (id & 0x8000)
h += 256;
return h;
}
@@ -223,17 +206,17 @@ static inline u32 from_hash(u32 id)
if (!(id & 0x8000)) {
if (id > 255)
return 256;
- return id&0xF;
+ return id & 0xF;
}
- return 16 + (id&0xF);
+ return 16 + (id & 0xF);
}
static unsigned long route4_get(struct tcf_proto *tp, u32 handle)
{
- struct route4_head *head = (struct route4_head*)tp->root;
+ struct route4_head *head = tp->root;
struct route4_bucket *b;
struct route4_filter *f;
- unsigned h1, h2;
+ unsigned int h1, h2;
if (!head)
return 0;
@@ -242,11 +225,12 @@ static unsigned long route4_get(struct tcf_proto *tp, u32 handle)
if (h1 > 256)
return 0;
- h2 = from_hash(handle>>16);
+ h2 = from_hash(handle >> 16);
if (h2 > 32)
return 0;
- if ((b = head->table[h1]) != NULL) {
+ b = head->table[h1];
+ if (b) {
for (f = b->ht[h2]; f; f = f->next)
if (f->handle == handle)
return (unsigned long)f;
@@ -263,7 +247,7 @@ static int route4_init(struct tcf_proto *tp)
return 0;
}
-static inline void
+static void
route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f)
{
tcf_unbind_filter(tp, &f->res);
@@ -273,17 +257,18 @@ route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f)
static void route4_destroy(struct tcf_proto *tp)
{
- struct route4_head *head = xchg(&tp->root, NULL);
+ struct route4_head *head = tp->root;
int h1, h2;
if (head == NULL)
return;
- for (h1=0; h1<=256; h1++) {
+ for (h1 = 0; h1 <= 256; h1++) {
struct route4_bucket *b;
- if ((b = head->table[h1]) != NULL) {
- for (h2=0; h2<=32; h2++) {
+ b = head->table[h1];
+ if (b) {
+ for (h2 = 0; h2 <= 32; h2++) {
struct route4_filter *f;
while ((f = b->ht[h2]) != NULL) {
@@ -299,9 +284,9 @@ static void route4_destroy(struct tcf_proto *tp)
static int route4_delete(struct tcf_proto *tp, unsigned long arg)
{
- struct route4_head *head = (struct route4_head*)tp->root;
- struct route4_filter **fp, *f = (struct route4_filter*)arg;
- unsigned h = 0;
+ struct route4_head *head = tp->root;
+ struct route4_filter **fp, *f = (struct route4_filter *)arg;
+ unsigned int h = 0;
struct route4_bucket *b;
int i;
@@ -311,18 +296,18 @@ static int route4_delete(struct tcf_proto *tp, unsigned long arg)
h = f->handle;
b = f->bkt;
- for (fp = &b->ht[from_hash(h>>16)]; *fp; fp = &(*fp)->next) {
+ for (fp = &b->ht[from_hash(h >> 16)]; *fp; fp = &(*fp)->next) {
if (*fp == f) {
tcf_tree_lock(tp);
*fp = f->next;
tcf_tree_unlock(tp);
- route4_reset_fastmap(tp->q->dev, head, f->id);
+ route4_reset_fastmap(tp->q, head, f->id);
route4_delete_filter(tp, f);
/* Strip tree */
- for (i=0; i<=32; i++)
+ for (i = 0; i <= 32; i++)
if (b->ht[i])
return 0;
@@ -338,9 +323,18 @@ static int route4_delete(struct tcf_proto *tp, unsigned long arg)
return 0;
}
-static int route4_set_parms(struct tcf_proto *tp, unsigned long base,
- struct route4_filter *f, u32 handle, struct route4_head *head,
- struct rtattr **tb, struct rtattr *est, int new)
+static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = {
+ [TCA_ROUTE4_CLASSID] = { .type = NLA_U32 },
+ [TCA_ROUTE4_TO] = { .type = NLA_U32 },
+ [TCA_ROUTE4_FROM] = { .type = NLA_U32 },
+ [TCA_ROUTE4_IIF] = { .type = NLA_U32 },
+};
+
+static int route4_set_parms(struct net *net, struct tcf_proto *tp,
+ unsigned long base, struct route4_filter *f,
+ u32 handle, struct route4_head *head,
+ struct nlattr **tb, struct nlattr *est, int new,
+ bool ovr)
{
int err;
u32 id = 0, to = 0, nhandle = 0x8000;
@@ -349,39 +343,30 @@ static int route4_set_parms(struct tcf_proto *tp, unsigned long base,
struct route4_bucket *b;
struct tcf_exts e;
- err = tcf_exts_validate(tp, tb, est, &e, &route_ext_map);
+ tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
+ err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
return err;
err = -EINVAL;
- if (tb[TCA_ROUTE4_CLASSID-1])
- if (RTA_PAYLOAD(tb[TCA_ROUTE4_CLASSID-1]) < sizeof(u32))
- goto errout;
-
- if (tb[TCA_ROUTE4_TO-1]) {
+ if (tb[TCA_ROUTE4_TO]) {
if (new && handle & 0x8000)
goto errout;
- if (RTA_PAYLOAD(tb[TCA_ROUTE4_TO-1]) < sizeof(u32))
- goto errout;
- to = *(u32*)RTA_DATA(tb[TCA_ROUTE4_TO-1]);
+ to = nla_get_u32(tb[TCA_ROUTE4_TO]);
if (to > 0xFF)
goto errout;
nhandle = to;
}
- if (tb[TCA_ROUTE4_FROM-1]) {
- if (tb[TCA_ROUTE4_IIF-1])
+ if (tb[TCA_ROUTE4_FROM]) {
+ if (tb[TCA_ROUTE4_IIF])
goto errout;
- if (RTA_PAYLOAD(tb[TCA_ROUTE4_FROM-1]) < sizeof(u32))
- goto errout;
- id = *(u32*)RTA_DATA(tb[TCA_ROUTE4_FROM-1]);
+ id = nla_get_u32(tb[TCA_ROUTE4_FROM]);
if (id > 0xFF)
goto errout;
nhandle |= id << 16;
- } else if (tb[TCA_ROUTE4_IIF-1]) {
- if (RTA_PAYLOAD(tb[TCA_ROUTE4_IIF-1]) < sizeof(u32))
- goto errout;
- id = *(u32*)RTA_DATA(tb[TCA_ROUTE4_IIF-1]);
+ } else if (tb[TCA_ROUTE4_IIF]) {
+ id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
if (id > 0x7FFF)
goto errout;
nhandle |= (id | 0x8000) << 16;
@@ -395,18 +380,19 @@ static int route4_set_parms(struct tcf_proto *tp, unsigned long base,
}
h1 = to_hash(nhandle);
- if ((b = head->table[h1]) == NULL) {
+ b = head->table[h1];
+ if (!b) {
err = -ENOBUFS;
- b = kmalloc(sizeof(struct route4_bucket), GFP_KERNEL);
+ b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL);
if (b == NULL)
goto errout;
- memset(b, 0, sizeof(*b));
tcf_tree_lock(tp);
head->table[h1] = b;
tcf_tree_unlock(tp);
} else {
unsigned int h2 = from_hash(nhandle >> 16);
+
err = -EEXIST;
for (fp = b->ht[h2]; fp; fp = fp->next)
if (fp->handle == f->handle)
@@ -414,20 +400,20 @@ static int route4_set_parms(struct tcf_proto *tp, unsigned long base,
}
tcf_tree_lock(tp);
- if (tb[TCA_ROUTE4_TO-1])
+ if (tb[TCA_ROUTE4_TO])
f->id = to;
- if (tb[TCA_ROUTE4_FROM-1])
+ if (tb[TCA_ROUTE4_FROM])
f->id = to | id<<16;
- else if (tb[TCA_ROUTE4_IIF-1])
+ else if (tb[TCA_ROUTE4_IIF])
f->iif = id;
f->handle = nhandle;
f->bkt = b;
tcf_tree_unlock(tp);
- if (tb[TCA_ROUTE4_CLASSID-1]) {
- f->res.classid = *(u32*)RTA_DATA(tb[TCA_ROUTE4_CLASSID-1]);
+ if (tb[TCA_ROUTE4_CLASSID]) {
+ f->res.classid = nla_get_u32(tb[TCA_ROUTE4_CLASSID]);
tcf_bind_filter(tp, &f->res, base);
}
@@ -439,16 +425,17 @@ errout:
return err;
}
-static int route4_change(struct tcf_proto *tp, unsigned long base,
+static int route4_change(struct net *net, struct sk_buff *in_skb,
+ struct tcf_proto *tp, unsigned long base,
u32 handle,
- struct rtattr **tca,
- unsigned long *arg)
+ struct nlattr **tca,
+ unsigned long *arg, bool ovr)
{
struct route4_head *head = tp->root;
struct route4_filter *f, *f1, **fp;
struct route4_bucket *b;
- struct rtattr *opt = tca[TCA_OPTIONS-1];
- struct rtattr *tb[TCA_ROUTE4_MAX];
+ struct nlattr *opt = tca[TCA_OPTIONS];
+ struct nlattr *tb[TCA_ROUTE4_MAX + 1];
unsigned int h, th;
u32 old_handle = 0;
int err;
@@ -456,18 +443,20 @@ static int route4_change(struct tcf_proto *tp, unsigned long base,
if (opt == NULL)
return handle ? -EINVAL : 0;
- if (rtattr_parse_nested(tb, TCA_ROUTE4_MAX, opt) < 0)
- return -EINVAL;
+ err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, route4_policy);
+ if (err < 0)
+ return err;
- if ((f = (struct route4_filter*)*arg) != NULL) {
+ f = (struct route4_filter *)*arg;
+ if (f) {
if (f->handle != handle && handle)
return -EINVAL;
if (f->bkt)
old_handle = f->handle;
- err = route4_set_parms(tp, base, f, handle, head, tb,
- tca[TCA_RATE-1], 0);
+ err = route4_set_parms(net, tp, base, f, handle, head, tb,
+ tca[TCA_RATE], 0, ovr);
if (err < 0)
return err;
@@ -476,29 +465,28 @@ static int route4_change(struct tcf_proto *tp, unsigned long base,
err = -ENOBUFS;
if (head == NULL) {
- head = kmalloc(sizeof(struct route4_head), GFP_KERNEL);
+ head = kzalloc(sizeof(struct route4_head), GFP_KERNEL);
if (head == NULL)
goto errout;
- memset(head, 0, sizeof(struct route4_head));
tcf_tree_lock(tp);
tp->root = head;
tcf_tree_unlock(tp);
}
- f = kmalloc(sizeof(struct route4_filter), GFP_KERNEL);
+ f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL);
if (f == NULL)
goto errout;
- memset(f, 0, sizeof(*f));
- err = route4_set_parms(tp, base, f, handle, head, tb,
- tca[TCA_RATE-1], 1);
+ tcf_exts_init(&f->exts, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
+ err = route4_set_parms(net, tp, base, f, handle, head, tb,
+ tca[TCA_RATE], 1, ovr);
if (err < 0)
goto errout;
reinsert:
h = from_hash(f->handle >> 16);
- for (fp = &f->bkt->ht[h]; (f1=*fp) != NULL; fp = &f1->next)
+ for (fp = &f->bkt->ht[h]; (f1 = *fp) != NULL; fp = &f1->next)
if (f->handle < f1->handle)
break;
@@ -509,7 +497,8 @@ reinsert:
if (old_handle && f->handle != old_handle) {
th = to_hash(old_handle);
h = from_hash(old_handle >> 16);
- if ((b = head->table[th]) != NULL) {
+ b = head->table[th];
+ if (b) {
for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) {
if (*fp == f) {
*fp = f->next;
@@ -520,7 +509,7 @@ reinsert:
}
tcf_tree_unlock(tp);
- route4_reset_fastmap(tp->q->dev, head, f->id);
+ route4_reset_fastmap(tp->q, head, f->id);
*arg = (unsigned long)f;
return 0;
@@ -532,7 +521,7 @@ errout:
static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct route4_head *head = tp->root;
- unsigned h, h1;
+ unsigned int h, h1;
if (head == NULL)
arg->stop = 1;
@@ -563,12 +552,12 @@ static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg)
}
}
-static int route4_dump(struct tcf_proto *tp, unsigned long fh,
+static int route4_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
struct sk_buff *skb, struct tcmsg *t)
{
- struct route4_filter *f = (struct route4_filter*)fh;
- unsigned char *b = skb->tail;
- struct rtattr *rta;
+ struct route4_filter *f = (struct route4_filter *)fh;
+ unsigned char *b = skb_tail_pointer(skb);
+ struct nlattr *nest;
u32 id;
if (f == NULL)
@@ -576,40 +565,44 @@ static int route4_dump(struct tcf_proto *tp, unsigned long fh,
t->tcm_handle = f->handle;
- rta = (struct rtattr*)b;
- RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (nest == NULL)
+ goto nla_put_failure;
- if (!(f->handle&0x8000)) {
- id = f->id&0xFF;
- RTA_PUT(skb, TCA_ROUTE4_TO, sizeof(id), &id);
+ if (!(f->handle & 0x8000)) {
+ id = f->id & 0xFF;
+ if (nla_put_u32(skb, TCA_ROUTE4_TO, id))
+ goto nla_put_failure;
}
- if (f->handle&0x80000000) {
- if ((f->handle>>16) != 0xFFFF)
- RTA_PUT(skb, TCA_ROUTE4_IIF, sizeof(f->iif), &f->iif);
+ if (f->handle & 0x80000000) {
+ if ((f->handle >> 16) != 0xFFFF &&
+ nla_put_u32(skb, TCA_ROUTE4_IIF, f->iif))
+ goto nla_put_failure;
} else {
- id = f->id>>16;
- RTA_PUT(skb, TCA_ROUTE4_FROM, sizeof(id), &id);
+ id = f->id >> 16;
+ if (nla_put_u32(skb, TCA_ROUTE4_FROM, id))
+ goto nla_put_failure;
}
- if (f->res.classid)
- RTA_PUT(skb, TCA_ROUTE4_CLASSID, 4, &f->res.classid);
+ if (f->res.classid &&
+ nla_put_u32(skb, TCA_ROUTE4_CLASSID, f->res.classid))
+ goto nla_put_failure;
- if (tcf_exts_dump(skb, &f->exts, &route_ext_map) < 0)
- goto rtattr_failure;
+ if (tcf_exts_dump(skb, &f->exts) < 0)
+ goto nla_put_failure;
- rta->rta_len = skb->tail - b;
+ nla_nest_end(skb, nest);
- if (tcf_exts_dump_stats(skb, &f->exts, &route_ext_map) < 0)
- goto rtattr_failure;
+ if (tcf_exts_dump_stats(skb, &f->exts) < 0)
+ goto nla_put_failure;
return skb->len;
-rtattr_failure:
- skb_trim(skb, b - skb->data);
+nla_put_failure:
+ nlmsg_trim(skb, b);
return -1;
}
-static struct tcf_proto_ops cls_route4_ops = {
- .next = NULL,
+static struct tcf_proto_ops cls_route4_ops __read_mostly = {
.kind = "route",
.classify = route4_classify,
.init = route4_init,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 23:37:06 +0000