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OpenCloudOS-Kernel/include/net/pkt_cls.h

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_PKT_CLS_H
#define __NET_PKT_CLS_H
#include <linux/pkt_cls.h>
#include <linux/workqueue.h>
#include <net/sch_generic.h>
#include <net/act_api.h>
#include <net/net_namespace.h>
/* TC action not accessible from user space */
#define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1)
/* Basic packet classifier frontend definitions. */
struct tcf_walker {
int stop;
int skip;
int count;
bool nonempty;
unsigned long cookie;
int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
};
int register_tcf_proto_ops(struct tcf_proto_ops *ops);
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
struct tcf_block_ext_info {
enum flow_block_binder_type binder_type;
tcf_chain_head_change_t *chain_head_change;
void *chain_head_change_priv;
u32 block_index;
};
struct tcf_block_cb;
bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
#ifdef CONFIG_NET_CLS
struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
u32 chain_index);
void tcf_chain_put_by_act(struct tcf_chain *chain);
struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
struct tcf_chain *chain);
struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
struct tcf_proto *tp, bool rtnl_held);
void tcf_block_netif_keep_dst(struct tcf_block *block);
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct netlink_ext_ack *extack);
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
struct tcf_block_ext_info *ei,
struct netlink_ext_ack *extack);
void tcf_block_put(struct tcf_block *block);
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei);
static inline bool tcf_block_shared(struct tcf_block *block)
{
return block->index;
}
static inline bool tcf_block_non_null_shared(struct tcf_block *block)
{
return block && block->index;
}
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
WARN_ON(tcf_block_shared(block));
return block->q;
}
int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode);
#else
static inline bool tcf_block_shared(struct tcf_block *block)
{
return false;
}
static inline bool tcf_block_non_null_shared(struct tcf_block *block)
{
return false;
}
static inline
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct netlink_ext_ack *extack)
{
return 0;
}
static inline
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
struct tcf_block_ext_info *ei,
struct netlink_ext_ack *extack)
{
return 0;
}
static inline void tcf_block_put(struct tcf_block *block)
{
}
static inline
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
}
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
return NULL;
}
static inline
int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
void *cb_priv)
{
return 0;
}
static inline
void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
void *cb_priv)
{
}
static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode)
{
return TC_ACT_UNSPEC;
}
#endif
static inline unsigned long
__cls_set_class(unsigned long *clp, unsigned long cl)
{
return xchg(clp, cl);
}
static inline unsigned long
cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
{
unsigned long old_cl;
sch_tree_lock(q);
old_cl = __cls_set_class(clp, cl);
sch_tree_unlock(q);
return old_cl;
}
static inline void
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
{
struct Qdisc *q = tp->chain->block->q;
unsigned long cl;
/* Check q as it is not set for shared blocks. In that case,
* setting class is not supported.
*/
if (!q)
return;
cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
cl = cls_set_class(q, &r->class, cl);
if (cl)
q->ops->cl_ops->unbind_tcf(q, cl);
}
static inline void
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
{
struct Qdisc *q = tp->chain->block->q;
unsigned long cl;
if (!q)
return;
if ((cl = __cls_set_class(&r->class, 0)) != 0)
q->ops->cl_ops->unbind_tcf(q, cl);
}
struct tcf_exts {
#ifdef CONFIG_NET_CLS_ACT
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
int nr_actions;
struct tc_action **actions;
struct net *net;
#endif
/* Map to export classifier specific extension TLV types to the
* generic extensions API. Unsupported extensions must be set to 0.
*/
int action;
int police;
};
static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
int action, int police)
{
#ifdef CONFIG_NET_CLS_ACT
exts->type = 0;
exts->nr_actions = 0;
exts->net = net;
exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
GFP_KERNEL);
if (!exts->actions)
return -ENOMEM;
#endif
exts->action = action;
exts->police = police;
return 0;
}
/* Return false if the netns is being destroyed in cleanup_net(). Callers
* need to do cleanup synchronously in this case, otherwise may race with
* tc_action_net_exit(). Return true for other cases.
*/
static inline bool tcf_exts_get_net(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
exts->net = maybe_get_net(exts->net);
return exts->net != NULL;
#else
return true;
#endif
}
static inline void tcf_exts_put_net(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
if (exts->net)
put_net(exts->net);
#endif
}
#ifdef CONFIG_NET_CLS_ACT
#define tcf_exts_for_each_action(i, a, exts) \
for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
#else
#define tcf_exts_for_each_action(i, a, exts) \
for (; 0; (void)(i), (void)(a), (void)(exts))
#endif
static inline void
tcf_exts_stats_update(const struct tcf_exts *exts,
u64 bytes, u64 packets, u64 lastuse)
{
#ifdef CONFIG_NET_CLS_ACT
int i;
preempt_disable();
for (i = 0; i < exts->nr_actions; i++) {
struct tc_action *a = exts->actions[i];
tcf_action_stats_update(a, bytes, packets, lastuse, true);
}
preempt_enable();
#endif
}
/**
* tcf_exts_has_actions - check if at least one action is present
* @exts: tc filter extensions handle
*
* Returns true if at least one action is present.
*/
static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
return exts->nr_actions;
#else
return false;
#endif
}
/**
* tcf_exts_exec - execute tc filter extensions
* @skb: socket buffer
* @exts: tc filter extensions handle
* @res: desired result
*
* Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
* a negative number if the filter must be considered unmatched or
* a positive action code (TC_ACT_*) which must be returned to the
* underlying layer.
*/
static inline int
tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
struct tcf_result *res)
{
#ifdef CONFIG_NET_CLS_ACT
return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
#endif
return TC_ACT_OK;
}
int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
struct nlattr **tb, struct nlattr *rate_tlv,
struct tcf_exts *exts, bool ovr, bool rtnl_held,
struct netlink_ext_ack *extack);
void tcf_exts_destroy(struct tcf_exts *exts);
void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
/**
* struct tcf_pkt_info - packet information
*/
struct tcf_pkt_info {
unsigned char * ptr;
int nexthdr;
};
#ifdef CONFIG_NET_EMATCH
struct tcf_ematch_ops;
/**
* struct tcf_ematch - extended match (ematch)
*
* @matchid: identifier to allow userspace to reidentify a match
* @flags: flags specifying attributes and the relation to other matches
* @ops: the operations lookup table of the corresponding ematch module
* @datalen: length of the ematch specific configuration data
* @data: ematch specific data
*/
struct tcf_ematch {
struct tcf_ematch_ops * ops;
unsigned long data;
unsigned int datalen;
u16 matchid;
u16 flags;
struct net *net;
};
static inline int tcf_em_is_container(struct tcf_ematch *em)
{
return !em->ops;
}
static inline int tcf_em_is_simple(struct tcf_ematch *em)
{
return em->flags & TCF_EM_SIMPLE;
}
static inline int tcf_em_is_inverted(struct tcf_ematch *em)
{
return em->flags & TCF_EM_INVERT;
}
static inline int tcf_em_last_match(struct tcf_ematch *em)
{
return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
}
static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
{
if (tcf_em_last_match(em))
return 1;
if (result == 0 && em->flags & TCF_EM_REL_AND)
return 1;
if (result != 0 && em->flags & TCF_EM_REL_OR)
return 1;
return 0;
}
/**
* struct tcf_ematch_tree - ematch tree handle
*
* @hdr: ematch tree header supplied by userspace
* @matches: array of ematches
*/
struct tcf_ematch_tree {
struct tcf_ematch_tree_hdr hdr;
struct tcf_ematch * matches;
};
/**
* struct tcf_ematch_ops - ematch module operations
*
* @kind: identifier (kind) of this ematch module
* @datalen: length of expected configuration data (optional)
* @change: called during validation (optional)
* @match: called during ematch tree evaluation, must return 1/0
* @destroy: called during destroyage (optional)
* @dump: called during dumping process (optional)
* @owner: owner, must be set to THIS_MODULE
* @link: link to previous/next ematch module (internal use)
*/
struct tcf_ematch_ops {
int kind;
int datalen;
int (*change)(struct net *net, void *,
int, struct tcf_ematch *);
int (*match)(struct sk_buff *, struct tcf_ematch *,
struct tcf_pkt_info *);
void (*destroy)(struct tcf_ematch *);
int (*dump)(struct sk_buff *, struct tcf_ematch *);
struct module *owner;
struct list_head link;
};
int tcf_em_register(struct tcf_ematch_ops *);
void tcf_em_unregister(struct tcf_ematch_ops *);
int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
struct tcf_ematch_tree *);
void tcf_em_tree_destroy(struct tcf_ematch_tree *);
int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
struct tcf_pkt_info *);
/**
* tcf_em_tree_match - evaulate an ematch tree
*
* @skb: socket buffer of the packet in question
* @tree: ematch tree to be used for evaluation
* @info: packet information examined by classifier
*
* This function matches @skb against the ematch tree in @tree by going
* through all ematches respecting their logic relations returning
* as soon as the result is obvious.
*
* Returns 1 if the ematch tree as-one matches, no ematches are configured
* or ematch is not enabled in the kernel, otherwise 0 is returned.
*/
static inline int tcf_em_tree_match(struct sk_buff *skb,
struct tcf_ematch_tree *tree,
struct tcf_pkt_info *info)
{
if (tree->hdr.nmatches)
return __tcf_em_tree_match(skb, tree, info);
else
return 1;
}
#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
#else /* CONFIG_NET_EMATCH */
struct tcf_ematch_tree {
};
#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
#define tcf_em_tree_dump(skb, t, tlv) (0)
#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
#endif /* CONFIG_NET_EMATCH */
static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
{
switch (layer) {
case TCF_LAYER_LINK:
return skb_mac_header(skb);
case TCF_LAYER_NETWORK:
return skb_network_header(skb);
case TCF_LAYER_TRANSPORT:
return skb_transport_header(skb);
}
return NULL;
}
static inline int tcf_valid_offset(const struct sk_buff *skb,
const unsigned char *ptr, const int len)
{
return likely((ptr + len) <= skb_tail_pointer(skb) &&
ptr >= skb->head &&
(ptr <= (ptr + len)));
}
static inline int
tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
struct netlink_ext_ack *extack)
{
char indev[IFNAMSIZ];
struct net_device *dev;
if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
NL_SET_ERR_MSG(extack, "Interface name too long");
return -EINVAL;
}
dev = __dev_get_by_name(net, indev);
if (!dev)
return -ENODEV;
return dev->ifindex;
}
static inline bool
tcf_match_indev(struct sk_buff *skb, int ifindex)
{
if (!ifindex)
return true;
if (!skb->skb_iif)
return false;
return ifindex == skb->skb_iif;
}
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts, bool rtnl_held);
void tc_cleanup_flow_action(struct flow_action *flow_action);
int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
void *type_data, bool err_stop, bool rtnl_held);
int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
enum tc_setup_type type, void *type_data, bool err_stop,
u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
enum tc_setup_type type, void *type_data, bool err_stop,
u32 *old_flags, unsigned int *old_in_hw_count,
u32 *new_flags, unsigned int *new_in_hw_count,
bool rtnl_held);
int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
enum tc_setup_type type, void *type_data, bool err_stop,
u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
bool add, flow_setup_cb_t *cb,
enum tc_setup_type type, void *type_data,
void *cb_priv, u32 *flags, unsigned int *in_hw_count);
unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
struct tc_cls_u32_knode {
struct tcf_exts *exts;
struct tcf_result *res;
struct tc_u32_sel *sel;
u32 handle;
u32 val;
u32 mask;
u32 link_handle;
u8 fshift;
};
struct tc_cls_u32_hnode {
u32 handle;
u32 prio;
unsigned int divisor;
};
enum tc_clsu32_command {
TC_CLSU32_NEW_KNODE,
TC_CLSU32_REPLACE_KNODE,
TC_CLSU32_DELETE_KNODE,
TC_CLSU32_NEW_HNODE,
TC_CLSU32_REPLACE_HNODE,
TC_CLSU32_DELETE_HNODE,
};
struct tc_cls_u32_offload {
struct flow_cls_common_offload common;
/* knode values */
enum tc_clsu32_command command;
union {
struct tc_cls_u32_knode knode;
struct tc_cls_u32_hnode hnode;
};
};
static inline bool tc_can_offload(const struct net_device *dev)
{
return dev->features & NETIF_F_HW_TC;
}
static inline bool tc_can_offload_extack(const struct net_device *dev,
struct netlink_ext_ack *extack)
{
bool can = tc_can_offload(dev);
if (!can)
NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
return can;
}
static inline bool
tc_cls_can_offload_and_chain0(const struct net_device *dev,
struct flow_cls_common_offload *common)
{
if (!tc_can_offload_extack(dev, common->extack))
return false;
if (common->chain_index) {
NL_SET_ERR_MSG(common->extack,
"Driver supports only offload of chain 0");
return false;
}
return true;
}
static inline bool tc_skip_hw(u32 flags)
{
return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
}
static inline bool tc_skip_sw(u32 flags)
{
return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
}
/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
static inline bool tc_flags_valid(u32 flags)
{
if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
TCA_CLS_FLAGS_VERBOSE))
return false;
flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
return false;
return true;
}
static inline bool tc_in_hw(u32 flags)
{
return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
}
static inline void
tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
const struct tcf_proto *tp, u32 flags,
struct netlink_ext_ack *extack)
{
cls_common->chain_index = tp->chain->index;
cls_common->protocol = tp->protocol;
cls_common->prio = tp->prio >> 16;
if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
cls_common->extack = extack;
}
enum tc_matchall_command {
TC_CLSMATCHALL_REPLACE,
TC_CLSMATCHALL_DESTROY,
TC_CLSMATCHALL_STATS,
};
struct tc_cls_matchall_offload {
struct flow_cls_common_offload common;
enum tc_matchall_command command;
struct flow_rule *rule;
struct flow_stats stats;
unsigned long cookie;
};
enum tc_clsbpf_command {
TC_CLSBPF_OFFLOAD,
TC_CLSBPF_STATS,
};
struct tc_cls_bpf_offload {
struct flow_cls_common_offload common;
enum tc_clsbpf_command command;
struct tcf_exts *exts;
struct bpf_prog *prog;
struct bpf_prog *oldprog;
const char *name;
bool exts_integrated;
};
struct tc_mqprio_qopt_offload {
/* struct tc_mqprio_qopt must always be the first element */
struct tc_mqprio_qopt qopt;
u16 mode;
u16 shaper;
u32 flags;
u64 min_rate[TC_QOPT_MAX_QUEUE];
u64 max_rate[TC_QOPT_MAX_QUEUE];
};
/* This structure holds cookie structure that is passed from user
* to the kernel for actions and classifiers
*/
struct tc_cookie {
u8 *data;
u32 len;
struct rcu_head rcu;
};
struct tc_qopt_offload_stats {
struct gnet_stats_basic_packed *bstats;
struct gnet_stats_queue *qstats;
};
enum tc_mq_command {
TC_MQ_CREATE,
TC_MQ_DESTROY,
TC_MQ_STATS,
TC_MQ_GRAFT,
};
struct tc_mq_opt_offload_graft_params {
unsigned long queue;
u32 child_handle;
};
struct tc_mq_qopt_offload {
enum tc_mq_command command;
u32 handle;
union {
struct tc_qopt_offload_stats stats;
struct tc_mq_opt_offload_graft_params graft_params;
};
};
enum tc_red_command {
TC_RED_REPLACE,
TC_RED_DESTROY,
TC_RED_STATS,
TC_RED_XSTATS,
TC_RED_GRAFT,
};
struct tc_red_qopt_offload_params {
u32 min;
u32 max;
u32 probability;
u32 limit;
bool is_ecn;
bool is_harddrop;
struct gnet_stats_queue *qstats;
};
struct tc_red_qopt_offload {
enum tc_red_command command;
u32 handle;
u32 parent;
union {
struct tc_red_qopt_offload_params set;
struct tc_qopt_offload_stats stats;
struct red_stats *xstats;
u32 child_handle;
};
};
enum tc_gred_command {
TC_GRED_REPLACE,
TC_GRED_DESTROY,
TC_GRED_STATS,
};
struct tc_gred_vq_qopt_offload_params {
bool present;
u32 limit;
u32 prio;
u32 min;
u32 max;
bool is_ecn;
bool is_harddrop;
u32 probability;
/* Only need backlog, see struct tc_prio_qopt_offload_params */
u32 *backlog;
};
struct tc_gred_qopt_offload_params {
bool grio_on;
bool wred_on;
unsigned int dp_cnt;
unsigned int dp_def;
struct gnet_stats_queue *qstats;
struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
};
struct tc_gred_qopt_offload_stats {
struct gnet_stats_basic_packed bstats[MAX_DPs];
struct gnet_stats_queue qstats[MAX_DPs];
struct red_stats *xstats[MAX_DPs];
};
struct tc_gred_qopt_offload {
enum tc_gred_command command;
u32 handle;
u32 parent;
union {
struct tc_gred_qopt_offload_params set;
struct tc_gred_qopt_offload_stats stats;
};
};
enum tc_prio_command {
TC_PRIO_REPLACE,
TC_PRIO_DESTROY,
TC_PRIO_STATS,
TC_PRIO_GRAFT,
};
struct tc_prio_qopt_offload_params {
int bands;
u8 priomap[TC_PRIO_MAX + 1];
/* In case that a prio qdisc is offloaded and now is changed to a
* non-offloadedable config, it needs to update the backlog & qlen
* values to negate the HW backlog & qlen values (and only them).
*/
struct gnet_stats_queue *qstats;
};
struct tc_prio_qopt_offload_graft_params {
u8 band;
u32 child_handle;
};
struct tc_prio_qopt_offload {
enum tc_prio_command command;
u32 handle;
u32 parent;
union {
struct tc_prio_qopt_offload_params replace_params;
struct tc_qopt_offload_stats stats;
struct tc_prio_qopt_offload_graft_params graft_params;
};
};
enum tc_root_command {
TC_ROOT_GRAFT,
};
struct tc_root_qopt_offload {
enum tc_root_command command;
u32 handle;
bool ingress;
};
#endif
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