1 #ifndef __LINUX_SKBUFF_WRAPPER_H
2 #define __LINUX_SKBUFF_WRAPPER_H 1
4 #include <linux/version.h>
5 #include <linux/types.h>
7 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
8 /* This should be before skbuff.h to make sure that we rewrite
12 int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
14 #define pskb_expand_head rpl_pskb_expand_head
17 #include_next <linux/skbuff.h>
19 #include <linux/jhash.h>
21 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
25 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
26 #define SKB_GSO_UDP_TUNNEL 0
29 #ifndef HAVE_SKB_GSO_GRE_CSUM
30 #define SKB_GSO_GRE_CSUM 0
33 #ifndef HAVE_SKB_GSO_UDP_TUNNEL_CSUM
34 #define SKB_GSO_UDP_TUNNEL_CSUM 0
37 #ifndef HAVE_IGNORE_DF_RENAME
38 #define ignore_df local_df
41 #ifndef HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET
42 static inline void skb_copy_from_linear_data_offset(const struct sk_buff *skb,
43 const int offset, void *to,
44 const unsigned int len)
46 memcpy(to, skb->data + offset, len);
49 static inline void skb_copy_to_linear_data_offset(struct sk_buff *skb,
52 const unsigned int len)
54 memcpy(skb->data + offset, from, len);
57 #endif /* !HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET */
59 #ifndef HAVE_SKB_RESET_TAIL_POINTER
60 static inline void skb_reset_tail_pointer(struct sk_buff *skb)
62 skb->tail = skb->data;
66 * The networking layer reserves some headroom in skb data (via
67 * dev_alloc_skb). This is used to avoid having to reallocate skb data when
68 * the header has to grow. In the default case, if the header has to grow
69 * 16 bytes or less we avoid the reallocation.
71 * Unfortunately this headroom changes the DMA alignment of the resulting
72 * network packet. As for NET_IP_ALIGN, this unaligned DMA is expensive
73 * on some architectures. An architecture can override this value,
74 * perhaps setting it to a cacheline in size (since that will maintain
75 * cacheline alignment of the DMA). It must be a power of 2.
77 * Various parts of the networking layer expect at least 16 bytes of
78 * headroom, you should not reduce this.
81 #define NET_SKB_PAD 16
84 #ifndef HAVE_SKB_COW_HEAD
85 static inline int __skb_cow(struct sk_buff *skb, unsigned int headroom,
90 if (headroom < NET_SKB_PAD)
91 headroom = NET_SKB_PAD;
92 if (headroom > skb_headroom(skb))
93 delta = headroom - skb_headroom(skb);
96 return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD), 0,
101 static inline int skb_cow_head(struct sk_buff *skb, unsigned int headroom)
103 return __skb_cow(skb, headroom, skb_header_cloned(skb));
105 #endif /* !HAVE_SKB_COW_HEAD */
107 #ifndef HAVE_SKB_DST_ACCESSOR_FUNCS
108 static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
110 return (struct dst_entry *)skb->dst;
113 static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
118 static inline struct rtable *skb_rtable(const struct sk_buff *skb)
120 return (struct rtable *)skb->dst;
124 #ifndef CHECKSUM_PARTIAL
125 #define CHECKSUM_PARTIAL CHECKSUM_HW
127 #ifndef CHECKSUM_COMPLETE
128 #define CHECKSUM_COMPLETE CHECKSUM_HW
131 #ifndef HAVE_SKBUFF_HEADER_HELPERS
132 static inline unsigned char *skb_transport_header(const struct sk_buff *skb)
137 static inline void skb_reset_transport_header(struct sk_buff *skb)
139 skb->h.raw = skb->data;
142 static inline void skb_set_transport_header(struct sk_buff *skb,
145 skb->h.raw = skb->data + offset;
148 static inline unsigned char *skb_network_header(const struct sk_buff *skb)
153 static inline void skb_reset_network_header(struct sk_buff *skb)
155 skb->nh.raw = skb->data;
158 static inline void skb_set_network_header(struct sk_buff *skb, const int offset)
160 skb->nh.raw = skb->data + offset;
163 static inline unsigned char *skb_mac_header(const struct sk_buff *skb)
168 static inline void skb_reset_mac_header(struct sk_buff *skb)
170 skb->mac_header = skb->data;
173 static inline void skb_set_mac_header(struct sk_buff *skb, const int offset)
175 skb->mac.raw = skb->data + offset;
178 static inline int skb_transport_offset(const struct sk_buff *skb)
180 return skb_transport_header(skb) - skb->data;
183 static inline int skb_network_offset(const struct sk_buff *skb)
185 return skb_network_header(skb) - skb->data;
188 static inline void skb_copy_to_linear_data(struct sk_buff *skb,
190 const unsigned int len)
192 memcpy(skb->data, from, len);
194 #endif /* !HAVE_SKBUFF_HEADER_HELPERS */
196 #ifndef HAVE_SKB_WARN_LRO
198 static inline bool skb_warn_if_lro(const struct sk_buff *skb)
203 extern void __skb_warn_lro_forwarding(const struct sk_buff *skb);
205 static inline bool skb_warn_if_lro(const struct sk_buff *skb)
207 /* LRO sets gso_size but not gso_type, whereas if GSO is really
208 * wanted then gso_type will be set. */
209 struct skb_shared_info *shinfo = skb_shinfo(skb);
210 if (shinfo->gso_size != 0 && unlikely(shinfo->gso_type == 0)) {
211 __skb_warn_lro_forwarding(skb);
216 #endif /* NETIF_F_LRO */
217 #endif /* HAVE_SKB_WARN_LRO */
219 #ifndef HAVE_CONSUME_SKB
220 #define consume_skb kfree_skb
223 #ifndef HAVE_SKB_FRAG_PAGE
224 #include <linux/mm.h>
226 static inline struct page *skb_frag_page(const skb_frag_t *frag)
231 static inline void __skb_frag_set_page(skb_frag_t *frag, struct page *page)
235 static inline void skb_frag_size_set(skb_frag_t *frag, unsigned int size)
239 static inline void __skb_frag_ref(skb_frag_t *frag)
241 get_page(skb_frag_page(frag));
243 static inline void __skb_frag_unref(skb_frag_t *frag)
245 put_page(skb_frag_page(frag));
248 static inline void skb_frag_ref(struct sk_buff *skb, int f)
250 __skb_frag_ref(&skb_shinfo(skb)->frags[f]);
253 static inline void skb_frag_unref(struct sk_buff *skb, int f)
255 __skb_frag_unref(&skb_shinfo(skb)->frags[f]);
260 #ifndef HAVE_SKB_RESET_MAC_LEN
261 static inline void skb_reset_mac_len(struct sk_buff *skb)
263 skb->mac_len = skb->network_header - skb->mac_header;
267 #ifndef HAVE_SKB_UNCLONE
268 static inline int skb_unclone(struct sk_buff *skb, gfp_t pri)
270 might_sleep_if(pri & __GFP_WAIT);
273 return pskb_expand_head(skb, 0, 0, pri);
279 #ifndef HAVE_SKB_ORPHAN_FRAGS
280 static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask)
286 #ifndef HAVE_SKB_GET_HASH
287 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
288 #define __skb_get_hash rpl__skb_get_rxhash
289 #define skb_get_hash rpl_skb_get_rxhash
291 extern u32 __skb_get_hash(struct sk_buff *skb);
292 static inline __u32 skb_get_hash(struct sk_buff *skb)
296 #ifndef HAVE_U16_RXHASH
299 return jhash_1word(skb->rxhash, 0);
302 return __skb_get_hash(skb);
306 #define skb_get_hash skb_get_rxhash
307 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) */
308 #endif /* HAVE_SKB_GET_HASH */
310 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
311 static inline void skb_tx_error(struct sk_buff *skb)
315 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) */
317 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
318 #define skb_zerocopy_headlen rpl_skb_zerocopy_headlen
319 unsigned int rpl_skb_zerocopy_headlen(const struct sk_buff *from);
322 #ifndef HAVE_SKB_ZEROCOPY
323 #define skb_zerocopy rpl_skb_zerocopy
324 int rpl_skb_zerocopy(struct sk_buff *to, struct sk_buff *from, int len,
328 #ifndef HAVE_SKB_CLEAR_HASH
329 static inline void skb_clear_hash(struct sk_buff *skb)
334 #if defined(HAVE_L4_RXHASH) && !defined(HAVE_RHEL_OVS_HOOK)
340 #ifndef HAVE_SKB_HAS_FRAG_LIST
341 #define skb_has_frag_list skb_has_frags
344 #ifndef HAVE___SKB_FILL_PAGE_DESC
345 static inline void __skb_fill_page_desc(struct sk_buff *skb, int i,
346 struct page *page, int off, int size)
348 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
350 __skb_frag_set_page(frag, page);
351 frag->page_offset = off;
352 skb_frag_size_set(frag, size);
356 #ifndef HAVE_SKB_ENSURE_WRITABLE
357 #define skb_ensure_writable rpl_skb_ensure_writable
358 int rpl_skb_ensure_writable(struct sk_buff *skb, int write_len);
361 #ifndef HAVE_SKB_VLAN_POP
362 #define skb_vlan_pop rpl_skb_vlan_pop
363 int rpl_skb_vlan_pop(struct sk_buff *skb);
366 #ifndef HAVE_SKB_VLAN_PUSH
367 #define skb_vlan_push rpl_skb_vlan_push
368 int rpl_skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci);
371 #ifndef HAVE_KFREE_SKB_LIST
372 void rpl_kfree_skb_list(struct sk_buff *segs);
373 #define kfree_skb_list rpl_kfree_skb_list
376 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,3,0)
377 #define skb_postpull_rcsum rpl_skb_postpull_rcsum
378 static inline void skb_postpull_rcsum(struct sk_buff *skb,
379 const void *start, unsigned int len)
381 if (skb->ip_summed == CHECKSUM_COMPLETE)
382 skb->csum = csum_sub(skb->csum, csum_partial(start, len, 0));
383 else if (skb->ip_summed == CHECKSUM_PARTIAL &&
384 skb_checksum_start_offset(skb) <= len)
385 skb->ip_summed = CHECKSUM_NONE;
388 #define skb_pull_rcsum rpl_skb_pull_rcsum
389 static inline unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
391 BUG_ON(len > skb->len);
393 BUG_ON(skb->len < skb->data_len);
394 skb_postpull_rcsum(skb, skb->data, len);
395 return skb->data += len;