diff options
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 128 |
1 files changed, 21 insertions, 107 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0b40417457cd..91ed66952580 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -330,6 +330,7 @@ struct tc_skb_ext { u8 post_ct_snat:1; u8 post_ct_dnat:1; u8 act_miss:1; /* Set if act_miss_cookie is used */ + u8 l2_miss:1; /* Set by bridge upon FDB or MDB miss */ }; #endif @@ -1383,7 +1384,7 @@ static inline int skb_pad(struct sk_buff *skb, int pad) #define dev_kfree_skb(a) consume_skb(a) int skb_append_pagefrags(struct sk_buff *skb, struct page *page, - int offset, size_t size); + int offset, size_t size, size_t max_frags); struct skb_seq_state { __u32 lower_offset; @@ -2421,20 +2422,22 @@ static inline unsigned int skb_pagelen(const struct sk_buff *skb) return skb_headlen(skb) + __skb_pagelen(skb); } +static inline void skb_frag_fill_page_desc(skb_frag_t *frag, + struct page *page, + int off, int size) +{ + frag->bv_page = page; + frag->bv_offset = off; + skb_frag_size_set(frag, size); +} + static inline void __skb_fill_page_desc_noacc(struct skb_shared_info *shinfo, int i, struct page *page, int off, int size) { skb_frag_t *frag = &shinfo->frags[i]; - /* - * Propagate page pfmemalloc to the skb if we can. The problem is - * that not all callers have unique ownership of the page but rely - * on page_is_pfmemalloc doing the right thing(tm). - */ - frag->bv_page = page; - frag->bv_offset = off; - skb_frag_size_set(frag, size); + skb_frag_fill_page_desc(frag, page, off, size); } /** @@ -2466,6 +2469,11 @@ static inline void __skb_fill_page_desc(struct sk_buff *skb, int i, struct page *page, int off, int size) { __skb_fill_page_desc_noacc(skb_shinfo(skb), i, page, off, size); + + /* Propagate page pfmemalloc to the skb if we can. The problem is + * that not all callers have unique ownership of the page but rely + * on page_is_pfmemalloc doing the right thing(tm). + */ page = compound_head(page); if (page_is_pfmemalloc(page)) skb->pfmemalloc = true; @@ -3494,32 +3502,6 @@ static inline void skb_frag_page_copy(skb_frag_t *fragto, fragto->bv_page = fragfrom->bv_page; } -/** - * __skb_frag_set_page - sets the page contained in a paged fragment - * @frag: the paged fragment - * @page: the page to set - * - * Sets the fragment @frag to contain @page. - */ -static inline void __skb_frag_set_page(skb_frag_t *frag, struct page *page) -{ - frag->bv_page = page; -} - -/** - * skb_frag_set_page - sets the page contained in a paged fragment of an skb - * @skb: the buffer - * @f: the fragment offset - * @page: the page to set - * - * Sets the @f'th fragment of @skb to contain @page. - */ -static inline void skb_frag_set_page(struct sk_buff *skb, int f, - struct page *page) -{ - __skb_frag_set_page(&skb_shinfo(skb)->frags[f], page); -} - bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio); /** @@ -3992,8 +3974,6 @@ int skb_zerocopy(struct sk_buff *to, struct sk_buff *from, void skb_split(struct sk_buff *skb, struct sk_buff *skb1, const u32 len); int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen); void skb_scrub_packet(struct sk_buff *skb, bool xnet); -bool skb_gso_validate_network_len(const struct sk_buff *skb, unsigned int mtu); -bool skb_gso_validate_mac_len(const struct sk_buff *skb, unsigned int len); struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features); struct sk_buff *skb_segment_list(struct sk_buff *skb, netdev_features_t features, unsigned int offset); @@ -4043,7 +4023,7 @@ __skb_header_pointer(const struct sk_buff *skb, int offset, int len, if (likely(hlen - offset >= len)) return (void *)data + offset; - if (!skb || unlikely(skb_copy_bits(skb, offset, buffer, len) < 0)) + if (!skb || !buffer || unlikely(skb_copy_bits(skb, offset, buffer, len) < 0)) return NULL; return buffer; @@ -4859,75 +4839,6 @@ static inline struct sec_path *skb_sec_path(const struct sk_buff *skb) #endif } -/* Keeps track of mac header offset relative to skb->head. - * It is useful for TSO of Tunneling protocol. e.g. GRE. - * For non-tunnel skb it points to skb_mac_header() and for - * tunnel skb it points to outer mac header. - * Keeps track of level of encapsulation of network headers. - */ -struct skb_gso_cb { - union { - int mac_offset; - int data_offset; - }; - int encap_level; - __wsum csum; - __u16 csum_start; -}; -#define SKB_GSO_CB_OFFSET 32 -#define SKB_GSO_CB(skb) ((struct skb_gso_cb *)((skb)->cb + SKB_GSO_CB_OFFSET)) - -static inline int skb_tnl_header_len(const struct sk_buff *inner_skb) -{ - return (skb_mac_header(inner_skb) - inner_skb->head) - - SKB_GSO_CB(inner_skb)->mac_offset; -} - -static inline int gso_pskb_expand_head(struct sk_buff *skb, int extra) -{ - int new_headroom, headroom; - int ret; - - headroom = skb_headroom(skb); - ret = pskb_expand_head(skb, extra, 0, GFP_ATOMIC); - if (ret) - return ret; - - new_headroom = skb_headroom(skb); - SKB_GSO_CB(skb)->mac_offset += (new_headroom - headroom); - return 0; -} - -static inline void gso_reset_checksum(struct sk_buff *skb, __wsum res) -{ - /* Do not update partial checksums if remote checksum is enabled. */ - if (skb->remcsum_offload) - return; - - SKB_GSO_CB(skb)->csum = res; - SKB_GSO_CB(skb)->csum_start = skb_checksum_start(skb) - skb->head; -} - -/* Compute the checksum for a gso segment. First compute the checksum value - * from the start of transport header to SKB_GSO_CB(skb)->csum_start, and - * then add in skb->csum (checksum from csum_start to end of packet). - * skb->csum and csum_start are then updated to reflect the checksum of the - * resultant packet starting from the transport header-- the resultant checksum - * is in the res argument (i.e. normally zero or ~ of checksum of a pseudo - * header. - */ -static inline __sum16 gso_make_checksum(struct sk_buff *skb, __wsum res) -{ - unsigned char *csum_start = skb_transport_header(skb); - int plen = (skb->head + SKB_GSO_CB(skb)->csum_start) - csum_start; - __wsum partial = SKB_GSO_CB(skb)->csum; - - SKB_GSO_CB(skb)->csum = res; - SKB_GSO_CB(skb)->csum_start = csum_start - skb->head; - - return csum_fold(csum_partial(csum_start, plen, partial)); -} - static inline bool skb_is_gso(const struct sk_buff *skb) { return skb_shinfo(skb)->gso_size; @@ -5126,5 +5037,8 @@ static inline void skb_mark_for_recycle(struct sk_buff *skb) #endif } +ssize_t skb_splice_from_iter(struct sk_buff *skb, struct iov_iter *iter, + ssize_t maxsize, gfp_t gfp); + #endif /* __KERNEL__ */ #endif /* _LINUX_SKBUFF_H */ |