projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c539f017 FW |
1 | #include <linux/types.h> |
| 2 | #include <net/net_namespace.h> | |
| 3 | #include <linux/netfilter/nf_conntrack_common.h> | |
| 4 | #include <linux/netfilter/nf_conntrack_tuple_common.h> | |
| 5 | #include <net/netfilter/nf_conntrack.h> | |
| 6 | #include <net/netfilter/nf_conntrack_extend.h> | |
| 7 | ||
| 8 | #include <uapi/linux/netfilter/xt_connlabel.h> | |
| 9 | ||
| d2bf2f34 FW |
10 | #define NF_CT_LABELS_MAX_SIZE ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE) |
| 11 | ||
| c539f017 FW |
12 | struct nf_conn_labels { |
| 13 | u8 words; | |
| 14 | unsigned long bits[]; | |
| 15 | }; | |
| 16 | ||
| 17 | static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct) | |
| 18 | { | |
| 19 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
| 20 | return nf_ct_ext_find(ct, NF_CT_EXT_LABELS); | |
| 21 | #else | |
| 22 | return NULL; | |
| 23 | #endif | |
| 24 | } | |
| 25 | ||
| 26 | static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct) | |
| 27 | { | |
| 28 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
| 29 | struct nf_conn_labels *cl_ext; | |
| 30 | struct net *net = nf_ct_net(ct); | |
| 31 | u8 words; | |
| 32 | ||
| 33 | words = ACCESS_ONCE(net->ct.label_words); | |
| d2bf2f34 | 34 | if (words == 0) |
| c539f017 FW |
35 | return NULL; |
| 36 | ||
| 37 | cl_ext = nf_ct_ext_add_length(ct, NF_CT_EXT_LABELS, | |
| 38 | words * sizeof(long), GFP_ATOMIC); | |
| 39 | if (cl_ext != NULL) | |
| 40 | cl_ext->words = words; | |
| 41 | ||
| 42 | return cl_ext; | |
| 43 | #else | |
| 44 | return NULL; | |
| 45 | #endif | |
| 46 | } | |
| 47 | ||
| c539f017 FW |
48 | int nf_connlabel_set(struct nf_conn *ct, u16 bit); |
| 49 | ||
| 9b21f6a9 FW |
50 | int nf_connlabels_replace(struct nf_conn *ct, |
| 51 | const u32 *data, const u32 *mask, unsigned int words); | |
| 52 | ||
| c539f017 | 53 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 5f69b8f5 G |
54 | int nf_conntrack_labels_init(void); |
| 55 | void nf_conntrack_labels_fini(void); | |
| adff6c65 | 56 | int nf_connlabels_get(struct net *net, unsigned int bit); |
| 86ca02e7 | 57 | void nf_connlabels_put(struct net *net); |
| c539f017 | 58 | #else |
| 5f69b8f5 G |
59 | static inline int nf_conntrack_labels_init(void) { return 0; } |
| 60 | static inline void nf_conntrack_labels_fini(void) {} | |
| adff6c65 | 61 | static inline int nf_connlabels_get(struct net *net, unsigned int bit) { return 0; } |
| 86ca02e7 | 62 | static inline void nf_connlabels_put(struct net *net) {} |
| c539f017 | 63 | #endif |