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Release 4.11 net/mpls/internal.h

Directory: net/mpls
#ifndef MPLS_INTERNAL_H

#define MPLS_INTERNAL_H
#include <net/mpls.h>


struct mpls_entry_decoded {
	
u32 label;
	
u8 ttl;
	
u8 tc;
	
u8 bos;
};


struct mpls_pcpu_stats {
	
struct mpls_link_stats	stats;
	
struct u64_stats_sync	syncp;
};


struct mpls_dev {
	
int				input_enabled;
	
struct net_device		*dev;
	
struct mpls_pcpu_stats __percpu	*stats;

	
struct ctl_table_header		*sysctl;
	
struct rcu_head			rcu;
};

#if BITS_PER_LONG == 32


#define MPLS_INC_STATS_LEN(mdev, len, pkts_field, bytes_field)		\
	do {                                                            \
                __typeof__(*(mdev)->stats) *ptr =                       \
                        raw_cpu_ptr((mdev)->stats);                     \
                local_bh_disable();                                     \
                u64_stats_update_begin(&ptr->syncp);                    \
                ptr->stats.pkts_field++;                                \
                ptr->stats.bytes_field += (len);                        \
                u64_stats_update_end(&ptr->syncp);                      \
                local_bh_enable();                                      \
        } while (0)


#define MPLS_INC_STATS(mdev, field)					\
	do {                                                            \
                __typeof__(*(mdev)->stats) *ptr =                       \
                        raw_cpu_ptr((mdev)->stats);                     \
                local_bh_disable();                                     \
                u64_stats_update_begin(&ptr->syncp);                    \
                ptr->stats.field++;                                     \
                u64_stats_update_end(&ptr->syncp);                      \
                local_bh_enable();                                      \
        } while (0)

#else


#define MPLS_INC_STATS_LEN(mdev, len, pkts_field, bytes_field)		\
	do {                                                            \
                this_cpu_inc((mdev)->stats->stats.pkts_field);          \
                this_cpu_add((mdev)->stats->stats.bytes_field, (len));  \
        } while (0)


#define MPLS_INC_STATS(mdev, field)			\
	this_cpu_inc((mdev)->stats->stats.field)

#endif

struct sk_buff;


#define LABEL_NOT_SPECIFIED (1 << 20)

#define MAX_NEW_LABELS 2

/* This maximum ha length copied from the definition of struct neighbour */

#define VIA_ALEN_ALIGN sizeof(unsigned long)

#define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, VIA_ALEN_ALIGN))


enum mpls_payload_type {
	
MPT_UNSPEC, /* IPv4 or IPv6 */
	
MPT_IPV4 = 4,
	
MPT_IPV6 = 6,

	/* Other types not implemented:
         *  - Pseudo-wire with or without control word (RFC4385)
         *  - GAL (RFC5586)
         */
};


struct mpls_nh { /* next hop label forwarding entry */
	
struct net_device __rcu *nh_dev;
	
unsigned int		nh_flags;
	
u32			nh_label[MAX_NEW_LABELS];
	
u8			nh_labels;
	
u8			nh_via_alen;
	
u8			nh_via_table;
};

/* The route, nexthops and vias are stored together in the same memory
 * block:
 *
 * +----------------------+
 * | mpls_route           |
 * +----------------------+
 * | mpls_nh 0            |
 * +----------------------+
 * | ...                  |
 * +----------------------+
 * | mpls_nh n-1          |
 * +----------------------+
 * | alignment padding    |
 * +----------------------+
 * | via[rt_max_alen] 0   |
 * +----------------------+
 * | ...                  |
 * +----------------------+
 * | via[rt_max_alen] n-1 |
 * +----------------------+
 */

struct mpls_route { /* next hop label forwarding entry */
	
struct rcu_head		rt_rcu;
	
u8			rt_protocol;
	
u8			rt_payload_type;
	
u8			rt_max_alen;
	
unsigned int		rt_nhn;
	
unsigned int		rt_nhn_alive;
	
struct mpls_nh		rt_nh[0];
};


#define for_nexthops(rt) {                                               \
        int nhsel; struct mpls_nh *nh;                  \
        for (nhsel = 0, nh = (rt)->rt_nh;                               \
             nhsel < (rt)->rt_nhn;                                      \
             nh++, nhsel++)


#define change_nexthops(rt) {                                               \
        int nhsel; struct mpls_nh *nh;                          \
        for (nhsel = 0, nh = (struct mpls_nh *)((rt)->rt_nh);   \
             nhsel < (rt)->rt_nhn;                                      \
             nh++, nhsel++)


#define endfor_nexthops(rt) }


static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos) { struct mpls_shim_hdr result; result.label_stack_entry = cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) | (tc << MPLS_LS_TC_SHIFT) | (bos ? (1 << MPLS_LS_S_SHIFT) : 0) | (ttl << MPLS_LS_TTL_SHIFT)); return result; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann64100.00%1100.00%
Total64100.00%1100.00%


static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr) { struct mpls_entry_decoded result; unsigned entry = be32_to_cpu(hdr->label_stack_entry); result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT; result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT; result.tc = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT; result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT; return result; }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann78100.00%1100.00%
Total78100.00%1100.00%


static inline struct mpls_dev *mpls_dev_get(const struct net_device *dev) { return rcu_dereference_rtnl(dev->mpls_ptr); }

Contributors

PersonTokensPropCommitsCommitProp
Robert Shearman23100.00%1100.00%
Total23100.00%1100.00%

int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, const u32 label[]); int nla_get_labels(const struct nlattr *nla, u32 max_labels, u8 *labels, u32 label[]); int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table, u8 via[]); bool mpls_output_possible(const struct net_device *dev); unsigned int mpls_dev_mtu(const struct net_device *dev); bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu); void mpls_stats_inc_outucastpkts(struct net_device *dev, const struct sk_buff *skb); #endif /* MPLS_INTERNAL_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann21139.89%216.67%
Roopa Prabhu16931.95%325.00%
Robert Shearman14126.65%541.67%
David Ahern50.95%18.33%
Jiri Benc30.57%18.33%
Total529100.00%12100.00%
Directory: net/mpls
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