X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=net%2Fcore%2Fskbuff.c;h=20e02d2605ecb2f10f5f74ab6f00cbd8fb852615;hb=18fb38e2f58ff7a66e30cbb71af81425edf1c9a1;hp=1c1738cc4538c142bcf8d3a7ec8a534204a68d91;hpb=8dce5f3dee21bf976193ddb06426b9727cf5d1a2;p=karo-tx-linux.git diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 1c1738cc4538..20e02d2605ec 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -199,9 +199,7 @@ struct sk_buff *__alloc_skb_head(gfp_t gfp_mask, int node) skb->truesize = sizeof(struct sk_buff); atomic_set(&skb->users, 1); -#ifdef NET_SKBUFF_DATA_USES_OFFSET - skb->mac_header = ~0U; -#endif + skb->mac_header = (typeof(skb->mac_header))~0U; out: return skb; } @@ -275,10 +273,8 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, skb->data = data; skb_reset_tail_pointer(skb); skb->end = skb->tail + size; -#ifdef NET_SKBUFF_DATA_USES_OFFSET - skb->mac_header = ~0U; - skb->transport_header = ~0U; -#endif + skb->mac_header = (typeof(skb->mac_header))~0U; + skb->transport_header = (typeof(skb->transport_header))~0U; /* make sure we initialize shinfo sequentially */ shinfo = skb_shinfo(skb); @@ -344,10 +340,8 @@ struct sk_buff *build_skb(void *data, unsigned int frag_size) skb->data = data; skb_reset_tail_pointer(skb); skb->end = skb->tail + size; -#ifdef NET_SKBUFF_DATA_USES_OFFSET - skb->mac_header = ~0U; - skb->transport_header = ~0U; -#endif + skb->mac_header = (typeof(skb->mac_header))~0U; + skb->transport_header = (typeof(skb->transport_header))~0U; /* make sure we initialize shinfo sequentially */ shinfo = skb_shinfo(skb); @@ -703,6 +697,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) new->transport_header = old->transport_header; new->network_header = old->network_header; new->mac_header = old->mac_header; + new->inner_protocol = old->inner_protocol; new->inner_transport_header = old->inner_transport_header; new->inner_network_header = old->inner_network_header; new->inner_mac_header = old->inner_mac_header; @@ -743,6 +738,10 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) new->vlan_tci = old->vlan_tci; skb_copy_secmark(new, old); + +#ifdef CONFIG_NET_LL_RX_POLL + new->napi_id = old->napi_id; +#endif } /* @@ -825,7 +824,7 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask) page = alloc_page(gfp_mask); if (!page) { while (head) { - struct page *next = (struct page *)head->private; + struct page *next = (struct page *)page_private(head); put_page(head); head = next; } @@ -835,7 +834,7 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask) memcpy(page_address(page), vaddr + f->page_offset, skb_frag_size(f)); kunmap_atomic(vaddr); - page->private = (unsigned long)head; + set_page_private(page, (unsigned long)head); head = page; } @@ -849,7 +848,7 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask) for (i = num_frags - 1; i >= 0; i--) { __skb_fill_page_desc(skb, i, head, 0, skb_shinfo(skb)->frags[i].size); - head = (struct page *)head->private; + head = (struct page *)page_private(head); } skb_shinfo(skb)->tx_flags &= ~SKBTX_DEV_ZEROCOPY; @@ -915,18 +914,8 @@ static void skb_headers_offset_update(struct sk_buff *skb, int off) static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old) { -#ifndef NET_SKBUFF_DATA_USES_OFFSET - /* - * Shift between the two data areas in bytes - */ - unsigned long offset = new->data - old->data; -#endif - __copy_skb_header(new, old); -#ifndef NET_SKBUFF_DATA_USES_OFFSET - skb_headers_offset_update(new, offset); -#endif skb_shinfo(new)->gso_size = skb_shinfo(old)->gso_size; skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs; skb_shinfo(new)->gso_type = skb_shinfo(old)->gso_type; @@ -1118,7 +1107,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, skb->end = skb->head + size; #endif skb->tail += off; - skb_headers_offset_update(skb, off); + skb_headers_offset_update(skb, nhead); /* Only adjust this if it actually is csum_start rather than csum */ if (skb->ip_summed == CHECKSUM_PARTIAL) skb->csum_start += nhead; @@ -1213,9 +1202,8 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb, off = newheadroom - oldheadroom; if (n->ip_summed == CHECKSUM_PARTIAL) n->csum_start += off; -#ifdef NET_SKBUFF_DATA_USES_OFFSET + skb_headers_offset_update(n, off); -#endif return n; } @@ -2558,8 +2546,13 @@ unsigned int skb_seq_read(unsigned int consumed, const u8 **data, unsigned int block_limit, abs_offset = consumed + st->lower_offset; skb_frag_t *frag; - if (unlikely(abs_offset >= st->upper_offset)) + if (unlikely(abs_offset >= st->upper_offset)) { + if (st->frag_data) { + kunmap_atomic(st->frag_data); + st->frag_data = NULL; + } return 0; + } next_skb: block_limit = skb_headlen(st->cur_skb) + st->stepped_offset; @@ -2857,7 +2850,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features) doffset + tnl_hlen); if (fskb != skb_shinfo(skb)->frag_list) - continue; + goto perform_csum_check; if (!sg) { nskb->ip_summed = CHECKSUM_NONE; @@ -2921,6 +2914,7 @@ skip_fraglist: nskb->len += nskb->data_len; nskb->truesize += nskb->data_len; +perform_csum_check: if (!csum) { nskb->csum = skb_checksum(nskb, doffset, nskb->len - doffset, 0); @@ -3503,3 +3497,26 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from, return true; } EXPORT_SYMBOL(skb_try_coalesce); + +/** + * skb_scrub_packet - scrub an skb before sending it to another netns + * + * @skb: buffer to clean + * + * skb_scrub_packet can be used to clean an skb before injecting it in + * another namespace. We have to clear all information in the skb that + * could impact namespace isolation. + */ +void skb_scrub_packet(struct sk_buff *skb) +{ + skb_orphan(skb); + skb->tstamp.tv64 = 0; + skb->pkt_type = PACKET_HOST; + skb->skb_iif = 0; + skb_dst_drop(skb); + skb->mark = 0; + secpath_reset(skb); + nf_reset(skb); + nf_reset_trace(skb); +} +EXPORT_SYMBOL_GPL(skb_scrub_packet);