zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/sched/cls_fw.c b/ap/os/linux/linux-3.4.x/net/sched/cls_fw.c
new file mode 100644
index 0000000..389af15
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/sched/cls_fw.c
@@ -0,0 +1,399 @@
+/*
+ * net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
+ *
+ * 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>
+ *
+ * Changes:
+ * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
+ * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
+ * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
+ *
+ * JHS: We should remove the CONFIG_NET_CLS_IND from here
+ * eventually when the meta match extension is made available
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <net/netlink.h>
+#include <net/act_api.h>
+#include <net/pkt_cls.h>
+
+#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))
+
+struct fw_head {
+ struct fw_filter *ht[HTSIZE];
+ u32 mask;
+};
+
+struct fw_filter {
+ struct fw_filter *next;
+ u32 id;
+ struct tcf_result res;
+#ifdef CONFIG_NET_CLS_IND
+ char indev[IFNAMSIZ];
+#endif /* CONFIG_NET_CLS_IND */
+ struct tcf_exts exts;
+};
+
+static const struct tcf_ext_map fw_ext_map = {
+ .action = TCA_FW_ACT,
+ .police = TCA_FW_POLICE
+};
+
+static inline int fw_hash(u32 handle)
+{
+ if (HTSIZE == 4096)
+ return ((handle >> 24) & 0xFFF) ^
+ ((handle >> 12) & 0xFFF) ^
+ (handle & 0xFFF);
+ else if (HTSIZE == 2048)
+ return ((handle >> 22) & 0x7FF) ^
+ ((handle >> 11) & 0x7FF) ^
+ (handle & 0x7FF);
+ else if (HTSIZE == 1024)
+ return ((handle >> 20) & 0x3FF) ^
+ ((handle >> 10) & 0x3FF) ^
+ (handle & 0x3FF);
+ else if (HTSIZE == 512)
+ return (handle >> 27) ^
+ ((handle >> 18) & 0x1FF) ^
+ ((handle >> 9) & 0x1FF) ^
+ (handle & 0x1FF);
+ else if (HTSIZE == 256) {
+ u8 *t = (u8 *) &handle;
+ return t[0] ^ t[1] ^ t[2] ^ t[3];
+ } else
+ return handle & (HTSIZE - 1);
+}
+
+static int fw_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+ struct tcf_result *res)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct fw_filter *f;
+ int r;
+ u32 id = skb->mark;
+
+ if (head != NULL) {
+ id &= head->mask;
+ for (f = head->ht[fw_hash(id)]; f; f = f->next) {
+ if (f->id == id) {
+ *res = f->res;
+#ifdef CONFIG_NET_CLS_IND
+ if (!tcf_match_indev(skb, f->indev))
+ continue;
+#endif /* CONFIG_NET_CLS_IND */
+ r = tcf_exts_exec(skb, &f->exts, res);
+ if (r < 0)
+ continue;
+
+ return r;
+ }
+ }
+ } else {
+ /* old method */
+ if (id && (TC_H_MAJ(id) == 0 ||
+ !(TC_H_MAJ(id ^ tp->q->handle)))) {
+ res->classid = id;
+ res->class = 0;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct fw_filter *f;
+
+ if (head == NULL)
+ return 0;
+
+ for (f = head->ht[fw_hash(handle)]; f; f = f->next) {
+ if (f->id == handle)
+ return (unsigned long)f;
+ }
+ return 0;
+}
+
+static void fw_put(struct tcf_proto *tp, unsigned long f)
+{
+}
+
+static int fw_init(struct tcf_proto *tp)
+{
+ return 0;
+}
+
+static void fw_delete_filter(struct tcf_proto *tp, struct fw_filter *f)
+{
+ tcf_unbind_filter(tp, &f->res);
+ tcf_exts_destroy(tp, &f->exts);
+ kfree(f);
+}
+
+static void fw_destroy(struct tcf_proto *tp)
+{
+ struct fw_head *head = tp->root;
+ struct fw_filter *f;
+ int h;
+
+ if (head == NULL)
+ return;
+
+ for (h = 0; h < HTSIZE; h++) {
+ while ((f = head->ht[h]) != NULL) {
+ head->ht[h] = f->next;
+ fw_delete_filter(tp, f);
+ }
+ }
+ kfree(head);
+}
+
+static int fw_delete(struct tcf_proto *tp, unsigned long arg)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct fw_filter *f = (struct fw_filter *)arg;
+ struct fw_filter **fp;
+
+ if (head == NULL || f == NULL)
+ goto out;
+
+ for (fp = &head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) {
+ if (*fp == f) {
+ tcf_tree_lock(tp);
+ *fp = f->next;
+ tcf_tree_unlock(tp);
+ fw_delete_filter(tp, f);
+ return 0;
+ }
+ }
+out:
+ return -EINVAL;
+}
+
+static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = {
+ [TCA_FW_CLASSID] = { .type = NLA_U32 },
+ [TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
+ [TCA_FW_MASK] = { .type = NLA_U32 },
+};
+
+static int
+fw_change_attrs(struct tcf_proto *tp, struct fw_filter *f,
+ struct nlattr **tb, struct nlattr **tca, unsigned long base)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct tcf_exts e;
+ u32 mask;
+ int err;
+
+ err = tcf_exts_validate(tp, tb, tca[TCA_RATE], &e, &fw_ext_map);
+ if (err < 0)
+ return err;
+
+ err = -EINVAL;
+ if (tb[TCA_FW_CLASSID]) {
+ f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
+ tcf_bind_filter(tp, &f->res, base);
+ }
+
+#ifdef CONFIG_NET_CLS_IND
+ if (tb[TCA_FW_INDEV]) {
+ err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV]);
+ if (err < 0)
+ goto errout;
+ }
+#endif /* CONFIG_NET_CLS_IND */
+
+ if (tb[TCA_FW_MASK]) {
+ mask = nla_get_u32(tb[TCA_FW_MASK]);
+ if (mask != head->mask)
+ goto errout;
+ } else if (head->mask != 0xFFFFFFFF)
+ goto errout;
+
+ tcf_exts_change(tp, &f->exts, &e);
+
+ return 0;
+errout:
+ tcf_exts_destroy(tp, &e);
+ return err;
+}
+
+static int fw_change(struct tcf_proto *tp, unsigned long base,
+ u32 handle,
+ struct nlattr **tca,
+ unsigned long *arg)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct fw_filter *f = (struct fw_filter *) *arg;
+ struct nlattr *opt = tca[TCA_OPTIONS];
+ struct nlattr *tb[TCA_FW_MAX + 1];
+ int err;
+
+ if (!opt)
+ return handle ? -EINVAL : 0;
+
+ err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy);
+ if (err < 0)
+ return err;
+
+ if (f != NULL) {
+ if (f->id != handle && handle)
+ return -EINVAL;
+ return fw_change_attrs(tp, f, tb, tca, base);
+ }
+
+ if (!handle)
+ return -EINVAL;
+
+ if (head == NULL) {
+ u32 mask = 0xFFFFFFFF;
+ if (tb[TCA_FW_MASK])
+ mask = nla_get_u32(tb[TCA_FW_MASK]);
+
+ head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
+ if (head == NULL)
+ return -ENOBUFS;
+ head->mask = mask;
+
+ tcf_tree_lock(tp);
+ tp->root = head;
+ tcf_tree_unlock(tp);
+ }
+
+ f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
+ if (f == NULL)
+ return -ENOBUFS;
+
+ f->id = handle;
+
+ err = fw_change_attrs(tp, f, tb, tca, base);
+ if (err < 0)
+ goto errout;
+
+ f->next = head->ht[fw_hash(handle)];
+ tcf_tree_lock(tp);
+ head->ht[fw_hash(handle)] = f;
+ tcf_tree_unlock(tp);
+
+ *arg = (unsigned long)f;
+ return 0;
+
+errout:
+ kfree(f);
+ return err;
+}
+
+static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ int h;
+
+ if (head == NULL)
+ arg->stop = 1;
+
+ if (arg->stop)
+ return;
+
+ for (h = 0; h < HTSIZE; h++) {
+ struct fw_filter *f;
+
+ for (f = head->ht[h]; f; f = 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++;
+ }
+ }
+}
+
+static int fw_dump(struct tcf_proto *tp, unsigned long fh,
+ struct sk_buff *skb, struct tcmsg *t)
+{
+ struct fw_head *head = (struct fw_head *)tp->root;
+ struct fw_filter *f = (struct fw_filter *)fh;
+ unsigned char *b = skb_tail_pointer(skb);
+ struct nlattr *nest;
+
+ if (f == NULL)
+ return skb->len;
+
+ t->tcm_handle = f->id;
+
+ if (!f->res.classid && !tcf_exts_is_available(&f->exts))
+ return skb->len;
+
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ if (f->res.classid)
+ NLA_PUT_U32(skb, TCA_FW_CLASSID, f->res.classid);
+#ifdef CONFIG_NET_CLS_IND
+ if (strlen(f->indev))
+ NLA_PUT_STRING(skb, TCA_FW_INDEV, f->indev);
+#endif /* CONFIG_NET_CLS_IND */
+ if (head->mask != 0xFFFFFFFF)
+ NLA_PUT_U32(skb, TCA_FW_MASK, head->mask);
+
+ if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
+ goto nla_put_failure;
+
+ nla_nest_end(skb, nest);
+
+ if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
+ goto nla_put_failure;
+
+ return skb->len;
+
+nla_put_failure:
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static struct tcf_proto_ops cls_fw_ops __read_mostly = {
+ .kind = "fw",
+ .classify = fw_classify,
+ .init = fw_init,
+ .destroy = fw_destroy,
+ .get = fw_get,
+ .put = fw_put,
+ .change = fw_change,
+ .delete = fw_delete,
+ .walk = fw_walk,
+ .dump = fw_dump,
+ .owner = THIS_MODULE,
+};
+
+static int __init init_fw(void)
+{
+ return register_tcf_proto_ops(&cls_fw_ops);
+}
+
+static void __exit exit_fw(void)
+{
+ unregister_tcf_proto_ops(&cls_fw_ops);
+}
+
+module_init(init_fw)
+module_exit(exit_fw)
+MODULE_LICENSE("GPL");