149ed6e97SBjoern A. Zeeb /*-
26baea331SBjoern A. Zeeb * Copyright (c) 2020-2022 The FreeBSD Foundation
36baea331SBjoern A. Zeeb * Copyright (c) 2021-2022 Bjoern A. Zeeb
449ed6e97SBjoern A. Zeeb *
549ed6e97SBjoern A. Zeeb * This software was developed by Björn Zeeb under sponsorship from
649ed6e97SBjoern A. Zeeb * the FreeBSD Foundation.
749ed6e97SBjoern A. Zeeb *
849ed6e97SBjoern A. Zeeb * Redistribution and use in source and binary forms, with or without
949ed6e97SBjoern A. Zeeb * modification, are permitted provided that the following conditions
1049ed6e97SBjoern A. Zeeb * are met:
1149ed6e97SBjoern A. Zeeb * 1. Redistributions of source code must retain the above copyright
1249ed6e97SBjoern A. Zeeb * notice, this list of conditions and the following disclaimer.
1349ed6e97SBjoern A. Zeeb * 2. Redistributions in binary form must reproduce the above copyright
1449ed6e97SBjoern A. Zeeb * notice, this list of conditions and the following disclaimer in the
1549ed6e97SBjoern A. Zeeb * documentation and/or other materials provided with the distribution.
1649ed6e97SBjoern A. Zeeb *
1749ed6e97SBjoern A. Zeeb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
1849ed6e97SBjoern A. Zeeb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1949ed6e97SBjoern A. Zeeb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2049ed6e97SBjoern A. Zeeb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
2149ed6e97SBjoern A. Zeeb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2249ed6e97SBjoern A. Zeeb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2349ed6e97SBjoern A. Zeeb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2449ed6e97SBjoern A. Zeeb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2549ed6e97SBjoern A. Zeeb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2649ed6e97SBjoern A. Zeeb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2749ed6e97SBjoern A. Zeeb * SUCH DAMAGE.
2849ed6e97SBjoern A. Zeeb */
2949ed6e97SBjoern A. Zeeb
3049ed6e97SBjoern A. Zeeb /*
3149ed6e97SBjoern A. Zeeb * NOTE: this socket buffer compatibility code is highly EXPERIMENTAL.
3249ed6e97SBjoern A. Zeeb * Do not rely on the internals of this implementation. They are highly
3349ed6e97SBjoern A. Zeeb * likely to change as we will improve the integration to FreeBSD mbufs.
3449ed6e97SBjoern A. Zeeb */
3549ed6e97SBjoern A. Zeeb
3649ed6e97SBjoern A. Zeeb #include <sys/cdefs.h>
376baea331SBjoern A. Zeeb #include "opt_ddb.h"
386baea331SBjoern A. Zeeb
3949ed6e97SBjoern A. Zeeb #include <sys/param.h>
4049ed6e97SBjoern A. Zeeb #include <sys/types.h>
4149ed6e97SBjoern A. Zeeb #include <sys/kernel.h>
4249ed6e97SBjoern A. Zeeb #include <sys/malloc.h>
436baea331SBjoern A. Zeeb #include <sys/sysctl.h>
446baea331SBjoern A. Zeeb
456baea331SBjoern A. Zeeb #ifdef DDB
466baea331SBjoern A. Zeeb #include <ddb/ddb.h>
476baea331SBjoern A. Zeeb #endif
4849ed6e97SBjoern A. Zeeb
4949ed6e97SBjoern A. Zeeb #include <linux/skbuff.h>
5049ed6e97SBjoern A. Zeeb #include <linux/slab.h>
516baea331SBjoern A. Zeeb #include <linux/gfp.h>
526a501570SBjoern A. Zeeb #ifdef __LP64__
536a501570SBjoern A. Zeeb #include <linux/log2.h>
546a501570SBjoern A. Zeeb #endif
556baea331SBjoern A. Zeeb
566baea331SBjoern A. Zeeb SYSCTL_DECL(_compat_linuxkpi);
576baea331SBjoern A. Zeeb SYSCTL_NODE(_compat_linuxkpi, OID_AUTO, skb, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
586baea331SBjoern A. Zeeb "LinuxKPI skbuff");
596baea331SBjoern A. Zeeb
606a501570SBjoern A. Zeeb #ifdef SKB_DEBUG
616baea331SBjoern A. Zeeb int linuxkpi_debug_skb;
626baea331SBjoern A. Zeeb SYSCTL_INT(_compat_linuxkpi_skb, OID_AUTO, debug, CTLFLAG_RWTUN,
636baea331SBjoern A. Zeeb &linuxkpi_debug_skb, 0, "SKB debug level");
646baea331SBjoern A. Zeeb #endif
6549ed6e97SBjoern A. Zeeb
666a501570SBjoern A. Zeeb #ifdef __LP64__
676a501570SBjoern A. Zeeb /*
686a501570SBjoern A. Zeeb * Realtek wireless drivers (e.g., rtw88) require 32bit DMA in a single segment.
696a501570SBjoern A. Zeeb * busdma(9) has a hard time providing this currently for 3-ish pages at large
706a501570SBjoern A. Zeeb * quantities (see lkpi_pci_nseg1_fail in linux_pci.c).
716a501570SBjoern A. Zeeb * Work around this for now by allowing a tunable to enforce physical addresses
726a501570SBjoern A. Zeeb * allocation limits on 64bit platforms using "old-school" contigmalloc(9) to
736a501570SBjoern A. Zeeb * avoid bouncing.
746a501570SBjoern A. Zeeb */
756a501570SBjoern A. Zeeb static int linuxkpi_skb_memlimit;
766a501570SBjoern A. Zeeb SYSCTL_INT(_compat_linuxkpi_skb, OID_AUTO, mem_limit, CTLFLAG_RDTUN,
776a501570SBjoern A. Zeeb &linuxkpi_skb_memlimit, 0, "SKB memory limit: 0=no limit, "
786a501570SBjoern A. Zeeb "1=32bit, 2=36bit, other=undef (currently 32bit)");
796a501570SBjoern A. Zeeb #endif
806a501570SBjoern A. Zeeb
8149ed6e97SBjoern A. Zeeb static MALLOC_DEFINE(M_LKPISKB, "lkpiskb", "Linux KPI skbuff compat");
8249ed6e97SBjoern A. Zeeb
8349ed6e97SBjoern A. Zeeb struct sk_buff *
linuxkpi_alloc_skb(size_t size,gfp_t gfp)8449ed6e97SBjoern A. Zeeb linuxkpi_alloc_skb(size_t size, gfp_t gfp)
8549ed6e97SBjoern A. Zeeb {
8649ed6e97SBjoern A. Zeeb struct sk_buff *skb;
8749ed6e97SBjoern A. Zeeb size_t len;
8849ed6e97SBjoern A. Zeeb
8949ed6e97SBjoern A. Zeeb len = sizeof(*skb) + size + sizeof(struct skb_shared_info);
9049ed6e97SBjoern A. Zeeb /*
916baea331SBjoern A. Zeeb * Using our own type here not backing my kmalloc.
9249ed6e97SBjoern A. Zeeb * We assume no one calls kfree directly on the skb.
9349ed6e97SBjoern A. Zeeb */
946a501570SBjoern A. Zeeb #ifdef __LP64__
956a501570SBjoern A. Zeeb if (__predict_true(linuxkpi_skb_memlimit == 0)) {
9649ed6e97SBjoern A. Zeeb skb = malloc(len, M_LKPISKB, linux_check_m_flags(gfp) | M_ZERO);
976a501570SBjoern A. Zeeb } else {
986a501570SBjoern A. Zeeb vm_paddr_t high;
996a501570SBjoern A. Zeeb
1006a501570SBjoern A. Zeeb switch (linuxkpi_skb_memlimit) {
1016a501570SBjoern A. Zeeb case 2:
1026a501570SBjoern A. Zeeb high = (0xfffffffff); /* 1<<36 really. */
1036a501570SBjoern A. Zeeb break;
1046a501570SBjoern A. Zeeb case 1:
1056a501570SBjoern A. Zeeb default:
1066a501570SBjoern A. Zeeb high = (0xffffffff); /* 1<<32 really. */
1076a501570SBjoern A. Zeeb break;
1086a501570SBjoern A. Zeeb }
1096a501570SBjoern A. Zeeb len = roundup_pow_of_two(len);
1106a501570SBjoern A. Zeeb skb = contigmalloc(len, M_LKPISKB,
1116a501570SBjoern A. Zeeb linux_check_m_flags(gfp) | M_ZERO, 0, high, PAGE_SIZE, 0);
1126a501570SBjoern A. Zeeb }
1136a501570SBjoern A. Zeeb #else
1146a501570SBjoern A. Zeeb skb = malloc(len, M_LKPISKB, linux_check_m_flags(gfp) | M_ZERO);
1156a501570SBjoern A. Zeeb #endif
11649ed6e97SBjoern A. Zeeb if (skb == NULL)
11749ed6e97SBjoern A. Zeeb return (skb);
1189df5f29cSBjoern A. Zeeb skb->_alloc_len = len;
11949ed6e97SBjoern A. Zeeb skb->truesize = size;
12049ed6e97SBjoern A. Zeeb
12149ed6e97SBjoern A. Zeeb skb->head = skb->data = skb->tail = (uint8_t *)(skb+1);
12249ed6e97SBjoern A. Zeeb skb->end = skb->head + size;
12349ed6e97SBjoern A. Zeeb
1246a8973c3SBjoern A. Zeeb skb->prev = skb->next = skb;
1256a8973c3SBjoern A. Zeeb
12649ed6e97SBjoern A. Zeeb skb->shinfo = (struct skb_shared_info *)(skb->end);
12749ed6e97SBjoern A. Zeeb
1289df5f29cSBjoern A. Zeeb SKB_TRACE_FMT(skb, "data %p size %zu", (skb) ? skb->data : NULL, size);
1299df5f29cSBjoern A. Zeeb return (skb);
1309df5f29cSBjoern A. Zeeb }
1319df5f29cSBjoern A. Zeeb
1329df5f29cSBjoern A. Zeeb struct sk_buff *
linuxkpi_dev_alloc_skb(size_t size,gfp_t gfp)1339df5f29cSBjoern A. Zeeb linuxkpi_dev_alloc_skb(size_t size, gfp_t gfp)
1349df5f29cSBjoern A. Zeeb {
1359df5f29cSBjoern A. Zeeb struct sk_buff *skb;
1369df5f29cSBjoern A. Zeeb size_t len;
1379df5f29cSBjoern A. Zeeb
1389df5f29cSBjoern A. Zeeb len = size + NET_SKB_PAD;
1399df5f29cSBjoern A. Zeeb skb = linuxkpi_alloc_skb(len, gfp);
1409df5f29cSBjoern A. Zeeb
1419df5f29cSBjoern A. Zeeb if (skb != NULL)
1429df5f29cSBjoern A. Zeeb skb_reserve(skb, NET_SKB_PAD);
1439df5f29cSBjoern A. Zeeb
1449df5f29cSBjoern A. Zeeb SKB_TRACE_FMT(skb, "data %p size %zu len %zu",
1459df5f29cSBjoern A. Zeeb (skb) ? skb->data : NULL, size, len);
14649ed6e97SBjoern A. Zeeb return (skb);
14749ed6e97SBjoern A. Zeeb }
14849ed6e97SBjoern A. Zeeb
149349b042bSBjoern A. Zeeb struct sk_buff *
linuxkpi_build_skb(void * data,size_t fragsz)1505504bd59SBjoern A. Zeeb linuxkpi_build_skb(void *data, size_t fragsz)
1515504bd59SBjoern A. Zeeb {
1525504bd59SBjoern A. Zeeb struct sk_buff *skb;
1535504bd59SBjoern A. Zeeb
1545504bd59SBjoern A. Zeeb if (data == NULL || fragsz == 0)
1555504bd59SBjoern A. Zeeb return (NULL);
1565504bd59SBjoern A. Zeeb
1575504bd59SBjoern A. Zeeb /* Just allocate a skb without data area. */
1585504bd59SBjoern A. Zeeb skb = linuxkpi_alloc_skb(0, GFP_KERNEL);
1595504bd59SBjoern A. Zeeb if (skb == NULL)
1605504bd59SBjoern A. Zeeb return (NULL);
1615504bd59SBjoern A. Zeeb
1625504bd59SBjoern A. Zeeb skb->_flags |= _SKB_FLAGS_SKBEXTFRAG;
1635504bd59SBjoern A. Zeeb skb->truesize = fragsz;
1645504bd59SBjoern A. Zeeb skb->head = skb->data = data;
1655504bd59SBjoern A. Zeeb skb_reset_tail_pointer(skb); /* XXX is that correct? */
1665504bd59SBjoern A. Zeeb skb->end = (void *)((uintptr_t)skb->head + fragsz);
1675504bd59SBjoern A. Zeeb
1685504bd59SBjoern A. Zeeb return (skb);
1695504bd59SBjoern A. Zeeb }
1705504bd59SBjoern A. Zeeb
1715504bd59SBjoern A. Zeeb struct sk_buff *
linuxkpi_skb_copy(struct sk_buff * skb,gfp_t gfp)172349b042bSBjoern A. Zeeb linuxkpi_skb_copy(struct sk_buff *skb, gfp_t gfp)
173349b042bSBjoern A. Zeeb {
174349b042bSBjoern A. Zeeb struct sk_buff *new;
175349b042bSBjoern A. Zeeb struct skb_shared_info *shinfo;
176349b042bSBjoern A. Zeeb size_t len;
177349b042bSBjoern A. Zeeb unsigned int headroom;
178349b042bSBjoern A. Zeeb
179349b042bSBjoern A. Zeeb /* Full buffer size + any fragments. */
180349b042bSBjoern A. Zeeb len = skb->end - skb->head + skb->data_len;
181349b042bSBjoern A. Zeeb
182349b042bSBjoern A. Zeeb new = linuxkpi_alloc_skb(len, gfp);
183349b042bSBjoern A. Zeeb if (new == NULL)
184349b042bSBjoern A. Zeeb return (NULL);
185349b042bSBjoern A. Zeeb
186349b042bSBjoern A. Zeeb headroom = skb_headroom(skb);
187349b042bSBjoern A. Zeeb /* Fixup head and end. */
188349b042bSBjoern A. Zeeb skb_reserve(new, headroom); /* data and tail move headroom forward. */
189349b042bSBjoern A. Zeeb skb_put(new, skb->len); /* tail and len get adjusted */
190349b042bSBjoern A. Zeeb
191349b042bSBjoern A. Zeeb /* Copy data. */
192349b042bSBjoern A. Zeeb memcpy(new->head, skb->data - headroom, headroom + skb->len);
193349b042bSBjoern A. Zeeb
194349b042bSBjoern A. Zeeb /* Deal with fragments. */
195349b042bSBjoern A. Zeeb shinfo = skb->shinfo;
196349b042bSBjoern A. Zeeb if (shinfo->nr_frags > 0) {
197349b042bSBjoern A. Zeeb printf("%s:%d: NOT YET SUPPORTED; missing %d frags\n",
198349b042bSBjoern A. Zeeb __func__, __LINE__, shinfo->nr_frags);
199349b042bSBjoern A. Zeeb SKB_TODO();
200349b042bSBjoern A. Zeeb }
201349b042bSBjoern A. Zeeb
202349b042bSBjoern A. Zeeb /* Deal with header fields. */
203349b042bSBjoern A. Zeeb memcpy(new->cb, skb->cb, sizeof(skb->cb));
204349b042bSBjoern A. Zeeb SKB_IMPROVE("more header fields to copy?");
205349b042bSBjoern A. Zeeb
206349b042bSBjoern A. Zeeb return (new);
207349b042bSBjoern A. Zeeb }
208349b042bSBjoern A. Zeeb
20949ed6e97SBjoern A. Zeeb void
linuxkpi_kfree_skb(struct sk_buff * skb)21049ed6e97SBjoern A. Zeeb linuxkpi_kfree_skb(struct sk_buff *skb)
21149ed6e97SBjoern A. Zeeb {
21249ed6e97SBjoern A. Zeeb struct skb_shared_info *shinfo;
2136baea331SBjoern A. Zeeb uint16_t fragno, count;
21449ed6e97SBjoern A. Zeeb
21549ed6e97SBjoern A. Zeeb SKB_TRACE(skb);
21649ed6e97SBjoern A. Zeeb if (skb == NULL)
21749ed6e97SBjoern A. Zeeb return;
21849ed6e97SBjoern A. Zeeb
21949ed6e97SBjoern A. Zeeb /*
22049ed6e97SBjoern A. Zeeb * XXX TODO this will go away once we have skb backed by mbuf.
22149ed6e97SBjoern A. Zeeb * currently we allow the mbuf to stay around and use a private
22249ed6e97SBjoern A. Zeeb * free function to allow secondary resources to be freed along.
22349ed6e97SBjoern A. Zeeb */
22449ed6e97SBjoern A. Zeeb if (skb->m != NULL) {
22549ed6e97SBjoern A. Zeeb void *m;
22649ed6e97SBjoern A. Zeeb
22749ed6e97SBjoern A. Zeeb m = skb->m;
22849ed6e97SBjoern A. Zeeb skb->m = NULL;
22949ed6e97SBjoern A. Zeeb
23049ed6e97SBjoern A. Zeeb KASSERT(skb->m_free_func != NULL, ("%s: skb %p has m %p but no "
23149ed6e97SBjoern A. Zeeb "m_free_func %p\n", __func__, skb, m, skb->m_free_func));
23249ed6e97SBjoern A. Zeeb skb->m_free_func(m);
23349ed6e97SBjoern A. Zeeb }
23449ed6e97SBjoern A. Zeeb KASSERT(skb->m == NULL,
23549ed6e97SBjoern A. Zeeb ("%s: skb %p m %p != NULL\n", __func__, skb, skb->m));
23649ed6e97SBjoern A. Zeeb
23749ed6e97SBjoern A. Zeeb shinfo = skb->shinfo;
2386baea331SBjoern A. Zeeb for (count = fragno = 0;
2396baea331SBjoern A. Zeeb count < shinfo->nr_frags && fragno < nitems(shinfo->frags);
2406baea331SBjoern A. Zeeb fragno++) {
24149ed6e97SBjoern A. Zeeb
2426baea331SBjoern A. Zeeb if (shinfo->frags[fragno].page != NULL) {
2436baea331SBjoern A. Zeeb struct page *p;
2446baea331SBjoern A. Zeeb
2456baea331SBjoern A. Zeeb p = shinfo->frags[fragno].page;
2466baea331SBjoern A. Zeeb shinfo->frags[fragno].size = 0;
2476baea331SBjoern A. Zeeb shinfo->frags[fragno].offset = 0;
2486baea331SBjoern A. Zeeb shinfo->frags[fragno].page = NULL;
2496baea331SBjoern A. Zeeb __free_page(p);
2506baea331SBjoern A. Zeeb count++;
2516baea331SBjoern A. Zeeb }
25249ed6e97SBjoern A. Zeeb }
25349ed6e97SBjoern A. Zeeb
2545504bd59SBjoern A. Zeeb if ((skb->_flags & _SKB_FLAGS_SKBEXTFRAG) != 0) {
2555504bd59SBjoern A. Zeeb void *p;
2565504bd59SBjoern A. Zeeb
2575504bd59SBjoern A. Zeeb p = skb->head;
2585504bd59SBjoern A. Zeeb skb_free_frag(p);
2595504bd59SBjoern A. Zeeb }
2605504bd59SBjoern A. Zeeb
2616a501570SBjoern A. Zeeb #ifdef __LP64__
2626a501570SBjoern A. Zeeb if (__predict_true(linuxkpi_skb_memlimit == 0))
26349ed6e97SBjoern A. Zeeb free(skb, M_LKPISKB);
2646a501570SBjoern A. Zeeb else
2656a501570SBjoern A. Zeeb contigfree(skb, skb->_alloc_len, M_LKPISKB);
2666a501570SBjoern A. Zeeb #else
2676a501570SBjoern A. Zeeb free(skb, M_LKPISKB);
2686a501570SBjoern A. Zeeb #endif
26949ed6e97SBjoern A. Zeeb }
2706baea331SBjoern A. Zeeb
2716baea331SBjoern A. Zeeb #ifdef DDB
DB_SHOW_COMMAND(skb,db_show_skb)2726baea331SBjoern A. Zeeb DB_SHOW_COMMAND(skb, db_show_skb)
2736baea331SBjoern A. Zeeb {
2746baea331SBjoern A. Zeeb struct sk_buff *skb;
2756baea331SBjoern A. Zeeb int i;
2766baea331SBjoern A. Zeeb
2776baea331SBjoern A. Zeeb if (!have_addr) {
2786baea331SBjoern A. Zeeb db_printf("usage: show skb <addr>\n");
2796baea331SBjoern A. Zeeb return;
2806baea331SBjoern A. Zeeb }
2816baea331SBjoern A. Zeeb
2826baea331SBjoern A. Zeeb skb = (struct sk_buff *)addr;
2836baea331SBjoern A. Zeeb
2846baea331SBjoern A. Zeeb db_printf("skb %p\n", skb);
2856baea331SBjoern A. Zeeb db_printf("\tnext %p prev %p\n", skb->next, skb->prev);
28689c32dafSBjoern A. Zeeb db_printf("\tlist %p\n", &skb->list);
2876baea331SBjoern A. Zeeb db_printf("\t_alloc_len %u len %u data_len %u truesize %u mac_len %u\n",
2886baea331SBjoern A. Zeeb skb->_alloc_len, skb->len, skb->data_len, skb->truesize,
2896baea331SBjoern A. Zeeb skb->mac_len);
2906baea331SBjoern A. Zeeb db_printf("\tcsum %#06x l3hdroff %u l4hdroff %u priority %u qmap %u\n",
2916baea331SBjoern A. Zeeb skb->csum, skb->l3hdroff, skb->l4hdroff, skb->priority, skb->qmap);
2926baea331SBjoern A. Zeeb db_printf("\tpkt_type %d dev %p sk %p\n",
2936baea331SBjoern A. Zeeb skb->pkt_type, skb->dev, skb->sk);
2946baea331SBjoern A. Zeeb db_printf("\tcsum_offset %d csum_start %d ip_summed %d protocol %d\n",
2956baea331SBjoern A. Zeeb skb->csum_offset, skb->csum_start, skb->ip_summed, skb->protocol);
2965504bd59SBjoern A. Zeeb db_printf("\t_flags %#06x\n", skb->_flags); /* XXX-BZ print names? */
2976baea331SBjoern A. Zeeb db_printf("\thead %p data %p tail %p end %p\n",
2986baea331SBjoern A. Zeeb skb->head, skb->data, skb->tail, skb->end);
2996baea331SBjoern A. Zeeb db_printf("\tshinfo %p m %p m_free_func %p\n",
3006baea331SBjoern A. Zeeb skb->shinfo, skb->m, skb->m_free_func);
3016baea331SBjoern A. Zeeb
3026baea331SBjoern A. Zeeb if (skb->shinfo != NULL) {
3036baea331SBjoern A. Zeeb struct skb_shared_info *shinfo;
3046baea331SBjoern A. Zeeb
3056baea331SBjoern A. Zeeb shinfo = skb->shinfo;
3066baea331SBjoern A. Zeeb db_printf("\t\tgso_type %d gso_size %u nr_frags %u\n",
3076baea331SBjoern A. Zeeb shinfo->gso_type, shinfo->gso_size, shinfo->nr_frags);
3086baea331SBjoern A. Zeeb for (i = 0; i < nitems(shinfo->frags); i++) {
3096baea331SBjoern A. Zeeb struct skb_frag *frag;
3106baea331SBjoern A. Zeeb
3116baea331SBjoern A. Zeeb frag = &shinfo->frags[i];
3126baea331SBjoern A. Zeeb if (frag == NULL || frag->page == NULL)
3136baea331SBjoern A. Zeeb continue;
3146baea331SBjoern A. Zeeb db_printf("\t\t\tfrag %p fragno %d page %p %p "
3156baea331SBjoern A. Zeeb "offset %ju size %zu\n",
3166baea331SBjoern A. Zeeb frag, i, frag->page, linux_page_address(frag->page),
3176baea331SBjoern A. Zeeb (uintmax_t)frag->offset, frag->size);
3186baea331SBjoern A. Zeeb }
3196baea331SBjoern A. Zeeb }
3206baea331SBjoern A. Zeeb db_printf("\tcb[] %p {", skb->cb);
3216baea331SBjoern A. Zeeb for (i = 0; i < nitems(skb->cb); i++) {
3226baea331SBjoern A. Zeeb db_printf("%#04x%s",
3236baea331SBjoern A. Zeeb skb->cb[i], (i < (nitems(skb->cb)-1)) ? ", " : "");
3246baea331SBjoern A. Zeeb }
3256baea331SBjoern A. Zeeb db_printf("}\n");
3266baea331SBjoern A. Zeeb
3275504bd59SBjoern A. Zeeb db_printf("\t__scratch[0] %p\n", skb->__scratch);
3286baea331SBjoern A. Zeeb };
3296baea331SBjoern A. Zeeb #endif
330