![Amir Vadai](/assets/img/avatar_default.png)
Introduce a new command in ndo_setup_tc() for hardware offloaded filters, to call the NIC driver, and make it update the statistics. This will be done before dumping the filter and its statistics. Signed-off-by: Amir Vadai <amirva@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
442 lines
10 KiB
C
442 lines
10 KiB
C
#ifndef __NET_PKT_CLS_H
|
|
#define __NET_PKT_CLS_H
|
|
|
|
#include <linux/pkt_cls.h>
|
|
#include <net/sch_generic.h>
|
|
#include <net/act_api.h>
|
|
|
|
/* Basic packet classifier frontend definitions. */
|
|
|
|
struct tcf_walker {
|
|
int stop;
|
|
int skip;
|
|
int count;
|
|
int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
|
|
};
|
|
|
|
int register_tcf_proto_ops(struct tcf_proto_ops *ops);
|
|
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
|
|
|
|
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 tcf_proto *tp, unsigned long *clp,
|
|
unsigned long cl)
|
|
{
|
|
unsigned long old_cl;
|
|
|
|
tcf_tree_lock(tp);
|
|
old_cl = __cls_set_class(clp, cl);
|
|
tcf_tree_unlock(tp);
|
|
|
|
return old_cl;
|
|
}
|
|
|
|
static inline void
|
|
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
|
|
{
|
|
unsigned long cl;
|
|
|
|
cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
|
|
cl = cls_set_class(tp, &r->class, cl);
|
|
if (cl)
|
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
|
}
|
|
|
|
static inline void
|
|
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
|
|
{
|
|
unsigned long cl;
|
|
|
|
if ((cl = __cls_set_class(&r->class, 0)) != 0)
|
|
tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
|
|
}
|
|
|
|
struct tcf_exts {
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
|
|
struct list_head actions;
|
|
#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 void tcf_exts_init(struct tcf_exts *exts, int action, int police)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
exts->type = 0;
|
|
INIT_LIST_HEAD(&exts->actions);
|
|
#endif
|
|
exts->action = action;
|
|
exts->police = police;
|
|
}
|
|
|
|
/**
|
|
* tcf_exts_is_predicative - check if a predicative extension is present
|
|
* @exts: tc filter extensions handle
|
|
*
|
|
* Returns 1 if a predicative extension is present, i.e. an extension which
|
|
* might cause further actions and thus overrule the regular tcf_result.
|
|
*/
|
|
static inline int
|
|
tcf_exts_is_predicative(struct tcf_exts *exts)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
return !list_empty(&exts->actions);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* tcf_exts_is_available - check if at least one extension is present
|
|
* @exts: tc filter extensions handle
|
|
*
|
|
* Returns 1 if at least one extension is present.
|
|
*/
|
|
static inline int
|
|
tcf_exts_is_available(struct tcf_exts *exts)
|
|
{
|
|
/* All non-predicative extensions must be added here. */
|
|
return tcf_exts_is_predicative(exts);
|
|
}
|
|
|
|
/**
|
|
* tcf_exts_exec - execute tc filter extensions
|
|
* @skb: socket buffer
|
|
* @exts: tc filter extensions handle
|
|
* @res: desired result
|
|
*
|
|
* Executes all configured extensions. Returns 0 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
|
|
if (!list_empty(&exts->actions))
|
|
return tcf_action_exec(skb, &exts->actions, res);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
|
|
struct nlattr **tb, struct nlattr *rate_tlv,
|
|
struct tcf_exts *exts, bool ovr);
|
|
void tcf_exts_destroy(struct tcf_exts *exts);
|
|
void tcf_exts_change(struct tcf_proto *tp, 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_change - replace ematch tree of a running classifier
|
|
*
|
|
* @tp: classifier kind handle
|
|
* @dst: destination ematch tree variable
|
|
* @src: source ematch tree (temporary tree from tcf_em_tree_validate)
|
|
*
|
|
* This functions replaces the ematch tree in @dst with the ematch
|
|
* tree in @src. The classifier in charge of the ematch tree may be
|
|
* running.
|
|
*/
|
|
static inline void tcf_em_tree_change(struct tcf_proto *tp,
|
|
struct tcf_ematch_tree *dst,
|
|
struct tcf_ematch_tree *src)
|
|
{
|
|
tcf_tree_lock(tp);
|
|
memcpy(dst, src, sizeof(*dst));
|
|
tcf_tree_unlock(tp);
|
|
}
|
|
|
|
/**
|
|
* 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_change(tp, dst, src) do { } while(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->data;
|
|
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)));
|
|
}
|
|
|
|
#ifdef CONFIG_NET_CLS_IND
|
|
#include <net/net_namespace.h>
|
|
|
|
static inline int
|
|
tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
|
|
{
|
|
char indev[IFNAMSIZ];
|
|
struct net_device *dev;
|
|
|
|
if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
|
|
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;
|
|
}
|
|
#endif /* CONFIG_NET_CLS_IND */
|
|
|
|
struct tc_cls_u32_knode {
|
|
struct tcf_exts *exts;
|
|
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 {
|
|
/* knode values */
|
|
enum tc_clsu32_command command;
|
|
union {
|
|
struct tc_cls_u32_knode knode;
|
|
struct tc_cls_u32_hnode hnode;
|
|
};
|
|
};
|
|
|
|
static inline bool tc_should_offload(struct net_device *dev, u32 flags)
|
|
{
|
|
if (!(dev->features & NETIF_F_HW_TC))
|
|
return false;
|
|
|
|
if (flags & TCA_CLS_FLAGS_SKIP_HW)
|
|
return false;
|
|
|
|
if (!dev->netdev_ops->ndo_setup_tc)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
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))
|
|
return false;
|
|
|
|
if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
enum tc_fl_command {
|
|
TC_CLSFLOWER_REPLACE,
|
|
TC_CLSFLOWER_DESTROY,
|
|
TC_CLSFLOWER_STATS,
|
|
};
|
|
|
|
struct tc_cls_flower_offload {
|
|
enum tc_fl_command command;
|
|
unsigned long cookie;
|
|
struct flow_dissector *dissector;
|
|
struct fl_flow_key *mask;
|
|
struct fl_flow_key *key;
|
|
struct tcf_exts *exts;
|
|
};
|
|
|
|
#endif
|