[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/sched/act_pedit.c b/src/kernel/linux/v4.14/net/sched/act_pedit.c
new file mode 100644
index 0000000..fb0caa5
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/sched/act_pedit.c
@@ -0,0 +1,495 @@
+/*
+ * net/sched/act_pedit.c Generic packet editor
+ *
+ * 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: Jamal Hadi Salim (2002-4)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <linux/tc_act/tc_pedit.h>
+#include <net/tc_act/tc_pedit.h>
+#include <uapi/linux/tc_act/tc_pedit.h>
+
+static unsigned int pedit_net_id;
+static struct tc_action_ops act_pedit_ops;
+
+static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
+ [TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) },
+ [TCA_PEDIT_KEYS_EX] = { .type = NLA_NESTED },
+};
+
+static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = {
+ [TCA_PEDIT_KEY_EX_HTYPE] = { .type = NLA_U16 },
+ [TCA_PEDIT_KEY_EX_CMD] = { .type = NLA_U16 },
+};
+
+static struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla,
+ u8 n)
+{
+ struct tcf_pedit_key_ex *keys_ex;
+ struct tcf_pedit_key_ex *k;
+ const struct nlattr *ka;
+ int err = -EINVAL;
+ int rem;
+
+ if (!nla)
+ return NULL;
+
+ keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL);
+ if (!keys_ex)
+ return ERR_PTR(-ENOMEM);
+
+ k = keys_ex;
+
+ nla_for_each_nested(ka, nla, rem) {
+ struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];
+
+ if (!n) {
+ err = -EINVAL;
+ goto err_out;
+ }
+ n--;
+
+ if (nla_type(ka) != TCA_PEDIT_KEY_EX) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = nla_parse_nested(tb, TCA_PEDIT_KEY_EX_MAX, ka,
+ pedit_key_ex_policy, NULL);
+ if (err)
+ goto err_out;
+
+ if (!tb[TCA_PEDIT_KEY_EX_HTYPE] ||
+ !tb[TCA_PEDIT_KEY_EX_CMD]) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
+ k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]);
+
+ if (k->htype > TCA_PEDIT_HDR_TYPE_MAX ||
+ k->cmd > TCA_PEDIT_CMD_MAX) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ k++;
+ }
+
+ if (n) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ return keys_ex;
+
+err_out:
+ kfree(keys_ex);
+ return ERR_PTR(err);
+}
+
+static int tcf_pedit_key_ex_dump(struct sk_buff *skb,
+ struct tcf_pedit_key_ex *keys_ex, int n)
+{
+ struct nlattr *keys_start = nla_nest_start(skb, TCA_PEDIT_KEYS_EX);
+
+ if (!keys_start)
+ goto nla_failure;
+ for (; n > 0; n--) {
+ struct nlattr *key_start;
+
+ key_start = nla_nest_start(skb, TCA_PEDIT_KEY_EX);
+ if (!key_start)
+ goto nla_failure;
+
+ if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) ||
+ nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd))
+ goto nla_failure;
+
+ nla_nest_end(skb, key_start);
+
+ keys_ex++;
+ }
+
+ nla_nest_end(skb, keys_start);
+
+ return 0;
+nla_failure:
+ nla_nest_cancel(skb, keys_start);
+ return -EINVAL;
+}
+
+static int tcf_pedit_init(struct net *net, struct nlattr *nla,
+ struct nlattr *est, struct tc_action **a,
+ int ovr, int bind)
+{
+ struct tc_action_net *tn = net_generic(net, pedit_net_id);
+ struct nlattr *tb[TCA_PEDIT_MAX + 1];
+ struct nlattr *pattr;
+ struct tc_pedit *parm;
+ int ret = 0, err;
+ struct tcf_pedit *p;
+ struct tc_pedit_key *keys = NULL;
+ struct tcf_pedit_key_ex *keys_ex;
+ int ksize;
+
+ if (nla == NULL)
+ return -EINVAL;
+
+ err = nla_parse_nested(tb, TCA_PEDIT_MAX, nla, pedit_policy, NULL);
+ if (err < 0)
+ return err;
+
+ pattr = tb[TCA_PEDIT_PARMS];
+ if (!pattr)
+ pattr = tb[TCA_PEDIT_PARMS_EX];
+ if (!pattr)
+ return -EINVAL;
+
+ parm = nla_data(pattr);
+ if (!parm->nkeys)
+ return -EINVAL;
+
+ ksize = parm->nkeys * sizeof(struct tc_pedit_key);
+ if (nla_len(pattr) < sizeof(*parm) + ksize)
+ return -EINVAL;
+
+ keys_ex = tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys);
+ if (IS_ERR(keys_ex))
+ return PTR_ERR(keys_ex);
+
+ if (!tcf_idr_check(tn, parm->index, a, bind)) {
+ ret = tcf_idr_create(tn, parm->index, est, a,
+ &act_pedit_ops, bind, false);
+ if (ret)
+ return ret;
+ p = to_pedit(*a);
+ keys = kmalloc(ksize, GFP_KERNEL);
+ if (keys == NULL) {
+ tcf_idr_release(*a, bind);
+ kfree(keys_ex);
+ return -ENOMEM;
+ }
+ ret = ACT_P_CREATED;
+ } else {
+ if (bind)
+ return 0;
+ tcf_idr_release(*a, bind);
+ if (!ovr)
+ return -EEXIST;
+ p = to_pedit(*a);
+ if (p->tcfp_nkeys && p->tcfp_nkeys != parm->nkeys) {
+ keys = kmalloc(ksize, GFP_KERNEL);
+ if (!keys) {
+ kfree(keys_ex);
+ return -ENOMEM;
+ }
+ }
+ }
+
+ spin_lock_bh(&p->tcf_lock);
+ p->tcfp_flags = parm->flags;
+ p->tcf_action = parm->action;
+ if (keys) {
+ kfree(p->tcfp_keys);
+ p->tcfp_keys = keys;
+ p->tcfp_nkeys = parm->nkeys;
+ }
+ memcpy(p->tcfp_keys, parm->keys, ksize);
+
+ kfree(p->tcfp_keys_ex);
+ p->tcfp_keys_ex = keys_ex;
+
+ spin_unlock_bh(&p->tcf_lock);
+ if (ret == ACT_P_CREATED)
+ tcf_idr_insert(tn, *a);
+ return ret;
+}
+
+static void tcf_pedit_cleanup(struct tc_action *a, int bind)
+{
+ struct tcf_pedit *p = to_pedit(a);
+ struct tc_pedit_key *keys = p->tcfp_keys;
+ kfree(keys);
+ kfree(p->tcfp_keys_ex);
+}
+
+static bool offset_valid(struct sk_buff *skb, int offset)
+{
+ if (offset > 0 && offset > skb->len)
+ return false;
+
+ if (offset < 0 && -offset > skb_headroom(skb))
+ return false;
+
+ return true;
+}
+
+static int pedit_skb_hdr_offset(struct sk_buff *skb,
+ enum pedit_header_type htype, int *hoffset)
+{
+ int ret = -EINVAL;
+
+ switch (htype) {
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
+ if (skb_mac_header_was_set(skb)) {
+ *hoffset = skb_mac_offset(skb);
+ ret = 0;
+ }
+ break;
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
+ *hoffset = skb_network_offset(skb);
+ ret = 0;
+ break;
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
+ case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
+ if (skb_transport_header_was_set(skb)) {
+ *hoffset = skb_transport_offset(skb);
+ ret = 0;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ };
+
+ return ret;
+}
+
+static int tcf_pedit(struct sk_buff *skb, const struct tc_action *a,
+ struct tcf_result *res)
+{
+ struct tcf_pedit *p = to_pedit(a);
+ int i;
+
+ if (skb_unclone(skb, GFP_ATOMIC))
+ return p->tcf_action;
+
+ spin_lock(&p->tcf_lock);
+
+ tcf_lastuse_update(&p->tcf_tm);
+
+ if (p->tcfp_nkeys > 0) {
+ struct tc_pedit_key *tkey = p->tcfp_keys;
+ struct tcf_pedit_key_ex *tkey_ex = p->tcfp_keys_ex;
+ enum pedit_header_type htype = TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
+ enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
+
+ for (i = p->tcfp_nkeys; i > 0; i--, tkey++) {
+ u32 *ptr, _data;
+ int offset = tkey->off;
+ int hoffset;
+ u32 val;
+ int rc;
+
+ if (tkey_ex) {
+ htype = tkey_ex->htype;
+ cmd = tkey_ex->cmd;
+
+ tkey_ex++;
+ }
+
+ rc = pedit_skb_hdr_offset(skb, htype, &hoffset);
+ if (rc) {
+ pr_info("tc filter pedit bad header type specified (0x%x)\n",
+ htype);
+ goto bad;
+ }
+
+ if (tkey->offmask) {
+ char *d, _d;
+
+ if (!offset_valid(skb, hoffset + tkey->at)) {
+ pr_info("tc filter pedit 'at' offset %d out of bounds\n",
+ hoffset + tkey->at);
+ goto bad;
+ }
+ d = skb_header_pointer(skb, hoffset + tkey->at, 1,
+ &_d);
+ if (!d)
+ goto bad;
+ offset += (*d & tkey->offmask) >> tkey->shift;
+ }
+
+ if (offset % 4) {
+ pr_info("tc filter pedit"
+ " offset must be on 32 bit boundaries\n");
+ goto bad;
+ }
+
+ if (!offset_valid(skb, hoffset + offset)) {
+ pr_info("tc filter pedit offset %d out of bounds\n",
+ hoffset + offset);
+ goto bad;
+ }
+
+ ptr = skb_header_pointer(skb, hoffset + offset, 4, &_data);
+ if (!ptr)
+ goto bad;
+ /* just do it, baby */
+ switch (cmd) {
+ case TCA_PEDIT_KEY_EX_CMD_SET:
+ val = tkey->val;
+ break;
+ case TCA_PEDIT_KEY_EX_CMD_ADD:
+ val = (*ptr + tkey->val) & ~tkey->mask;
+ break;
+ default:
+ pr_info("tc filter pedit bad command (%d)\n",
+ cmd);
+ goto bad;
+ }
+
+ *ptr = ((*ptr & tkey->mask) ^ val);
+ if (ptr == &_data)
+ skb_store_bits(skb, hoffset + offset, ptr, 4);
+ }
+
+ goto done;
+ } else
+ WARN(1, "pedit BUG: index %d\n", p->tcf_index);
+
+bad:
+ p->tcf_qstats.overlimits++;
+done:
+ bstats_update(&p->tcf_bstats, skb);
+ spin_unlock(&p->tcf_lock);
+ return p->tcf_action;
+}
+
+static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
+ int bind, int ref)
+{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_pedit *p = to_pedit(a);
+ struct tc_pedit *opt;
+ struct tcf_t t;
+ int s;
+
+ s = sizeof(*opt) + p->tcfp_nkeys * sizeof(struct tc_pedit_key);
+
+ /* netlink spinlocks held above us - must use ATOMIC */
+ opt = kzalloc(s, GFP_ATOMIC);
+ if (unlikely(!opt))
+ return -ENOBUFS;
+
+ memcpy(opt->keys, p->tcfp_keys,
+ p->tcfp_nkeys * sizeof(struct tc_pedit_key));
+ opt->index = p->tcf_index;
+ opt->nkeys = p->tcfp_nkeys;
+ opt->flags = p->tcfp_flags;
+ opt->action = p->tcf_action;
+ opt->refcnt = p->tcf_refcnt - ref;
+ opt->bindcnt = p->tcf_bindcnt - bind;
+
+ if (p->tcfp_keys_ex) {
+ if (tcf_pedit_key_ex_dump(skb,
+ p->tcfp_keys_ex,
+ p->tcfp_nkeys))
+ goto nla_put_failure;
+
+ if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt))
+ goto nla_put_failure;
+ } else {
+ if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
+ goto nla_put_failure;
+ }
+
+ tcf_tm_dump(&t, &p->tcf_tm);
+ if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
+ goto nla_put_failure;
+
+ kfree(opt);
+ return skb->len;
+
+nla_put_failure:
+ nlmsg_trim(skb, b);
+ kfree(opt);
+ return -1;
+}
+
+static int tcf_pedit_walker(struct net *net, struct sk_buff *skb,
+ struct netlink_callback *cb, int type,
+ const struct tc_action_ops *ops)
+{
+ struct tc_action_net *tn = net_generic(net, pedit_net_id);
+
+ return tcf_generic_walker(tn, skb, cb, type, ops);
+}
+
+static int tcf_pedit_search(struct net *net, struct tc_action **a, u32 index)
+{
+ struct tc_action_net *tn = net_generic(net, pedit_net_id);
+
+ return tcf_idr_search(tn, a, index);
+}
+
+static struct tc_action_ops act_pedit_ops = {
+ .kind = "pedit",
+ .type = TCA_ACT_PEDIT,
+ .owner = THIS_MODULE,
+ .act = tcf_pedit,
+ .dump = tcf_pedit_dump,
+ .cleanup = tcf_pedit_cleanup,
+ .init = tcf_pedit_init,
+ .walk = tcf_pedit_walker,
+ .lookup = tcf_pedit_search,
+ .size = sizeof(struct tcf_pedit),
+};
+
+static __net_init int pedit_init_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, pedit_net_id);
+
+ return tc_action_net_init(net, tn, &act_pedit_ops);
+}
+
+static void __net_exit pedit_exit_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, pedit_net_id);
+
+ tc_action_net_exit(tn);
+}
+
+static struct pernet_operations pedit_net_ops = {
+ .init = pedit_init_net,
+ .exit = pedit_exit_net,
+ .id = &pedit_net_id,
+ .size = sizeof(struct tc_action_net),
+};
+
+MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
+MODULE_DESCRIPTION("Generic Packet Editor actions");
+MODULE_LICENSE("GPL");
+
+static int __init pedit_init_module(void)
+{
+ return tcf_register_action(&act_pedit_ops, &pedit_net_ops);
+}
+
+static void __exit pedit_cleanup_module(void)
+{
+ tcf_unregister_action(&act_pedit_ops, &pedit_net_ops);
+}
+
+module_init(pedit_init_module);
+module_exit(pedit_cleanup_module);
+