1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc.
8 #include <linux/btf_ids.h>
9 #include <linux/filter.h>
10 #include <linux/types.h>
12 #include <linux/netdevice.h>
13 #include <linux/slab.h>
14 #include <linux/idr.h>
15 #include <linux/rhashtable.h>
16 #include <linux/bug.h>
17 #include <net/page_pool/helpers.h>
19 #include <net/hotdata.h>
21 #include <net/xdp_priv.h> /* struct xdp_mem_allocator */
22 #include <trace/events/xdp.h>
23 #include <net/xdp_sock_drv.h>
25 #define REG_STATE_NEW 0x0
26 #define REG_STATE_REGISTERED 0x1
27 #define REG_STATE_UNREGISTERED 0x2
28 #define REG_STATE_UNUSED 0x3
30 static DEFINE_IDA(mem_id_pool);
31 static DEFINE_MUTEX(mem_id_lock);
32 #define MEM_ID_MAX 0xFFFE
34 static int mem_id_next = MEM_ID_MIN;
36 static bool mem_id_init; /* false */
37 static struct rhashtable *mem_id_ht;
39 static u32 xdp_mem_id_hashfn(const void *data, u32 len, u32 seed)
44 BUILD_BUG_ON(sizeof_field(struct xdp_mem_allocator, mem.id)
47 /* Use cyclic increasing ID as direct hash key */
51 static int xdp_mem_id_cmp(struct rhashtable_compare_arg *arg,
54 const struct xdp_mem_allocator *xa = ptr;
55 u32 mem_id = *(u32 *)arg->key;
57 return xa->mem.id != mem_id;
60 static const struct rhashtable_params mem_id_rht_params = {
62 .head_offset = offsetof(struct xdp_mem_allocator, node),
63 .key_offset = offsetof(struct xdp_mem_allocator, mem.id),
64 .key_len = sizeof_field(struct xdp_mem_allocator, mem.id),
65 .max_size = MEM_ID_MAX,
67 .automatic_shrinking = true,
68 .hashfn = xdp_mem_id_hashfn,
69 .obj_cmpfn = xdp_mem_id_cmp,
72 static void __xdp_mem_allocator_rcu_free(struct rcu_head *rcu)
74 struct xdp_mem_allocator *xa;
76 xa = container_of(rcu, struct xdp_mem_allocator, rcu);
78 /* Allow this ID to be reused */
79 ida_free(&mem_id_pool, xa->mem.id);
84 static void mem_xa_remove(struct xdp_mem_allocator *xa)
86 trace_mem_disconnect(xa);
88 if (!rhashtable_remove_fast(mem_id_ht, &xa->node, mem_id_rht_params))
89 call_rcu(&xa->rcu, __xdp_mem_allocator_rcu_free);
92 static void mem_allocator_disconnect(void *allocator)
94 struct xdp_mem_allocator *xa;
95 struct rhashtable_iter iter;
97 mutex_lock(&mem_id_lock);
99 rhashtable_walk_enter(mem_id_ht, &iter);
101 rhashtable_walk_start(&iter);
103 while ((xa = rhashtable_walk_next(&iter)) && !IS_ERR(xa)) {
104 if (xa->allocator == allocator)
108 rhashtable_walk_stop(&iter);
110 } while (xa == ERR_PTR(-EAGAIN));
111 rhashtable_walk_exit(&iter);
113 mutex_unlock(&mem_id_lock);
116 void xdp_unreg_mem_model(struct xdp_mem_info *mem)
118 struct xdp_mem_allocator *xa;
119 int type = mem->type;
122 /* Reset mem info to defaults */
129 if (type == MEM_TYPE_PAGE_POOL) {
131 xa = rhashtable_lookup(mem_id_ht, &id, mem_id_rht_params);
132 page_pool_destroy(xa->page_pool);
136 EXPORT_SYMBOL_GPL(xdp_unreg_mem_model);
138 void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
140 if (xdp_rxq->reg_state != REG_STATE_REGISTERED) {
141 WARN(1, "Missing register, driver bug");
145 xdp_unreg_mem_model(&xdp_rxq->mem);
147 EXPORT_SYMBOL_GPL(xdp_rxq_info_unreg_mem_model);
149 void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq)
151 /* Simplify driver cleanup code paths, allow unreg "unused" */
152 if (xdp_rxq->reg_state == REG_STATE_UNUSED)
155 xdp_rxq_info_unreg_mem_model(xdp_rxq);
157 xdp_rxq->reg_state = REG_STATE_UNREGISTERED;
160 EXPORT_SYMBOL_GPL(xdp_rxq_info_unreg);
162 static void xdp_rxq_info_init(struct xdp_rxq_info *xdp_rxq)
164 memset(xdp_rxq, 0, sizeof(*xdp_rxq));
167 /* Returns 0 on success, negative on failure */
168 int __xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
169 struct net_device *dev, u32 queue_index,
170 unsigned int napi_id, u32 frag_size)
173 WARN(1, "Missing net_device from driver");
177 if (xdp_rxq->reg_state == REG_STATE_UNUSED) {
178 WARN(1, "Driver promised not to register this");
182 if (xdp_rxq->reg_state == REG_STATE_REGISTERED) {
183 WARN(1, "Missing unregister, handled but fix driver");
184 xdp_rxq_info_unreg(xdp_rxq);
187 /* State either UNREGISTERED or NEW */
188 xdp_rxq_info_init(xdp_rxq);
190 xdp_rxq->queue_index = queue_index;
191 xdp_rxq->napi_id = napi_id;
192 xdp_rxq->frag_size = frag_size;
194 xdp_rxq->reg_state = REG_STATE_REGISTERED;
197 EXPORT_SYMBOL_GPL(__xdp_rxq_info_reg);
199 void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq)
201 xdp_rxq->reg_state = REG_STATE_UNUSED;
203 EXPORT_SYMBOL_GPL(xdp_rxq_info_unused);
205 bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq)
207 return (xdp_rxq->reg_state == REG_STATE_REGISTERED);
209 EXPORT_SYMBOL_GPL(xdp_rxq_info_is_reg);
211 static int __mem_id_init_hash_table(void)
213 struct rhashtable *rht;
216 if (unlikely(mem_id_init))
219 rht = kzalloc(sizeof(*rht), GFP_KERNEL);
223 ret = rhashtable_init(rht, &mem_id_rht_params);
229 smp_mb(); /* mutex lock should provide enough pairing */
235 /* Allocate a cyclic ID that maps to allocator pointer.
236 * See: https://www.kernel.org/doc/html/latest/core-api/idr.html
238 * Caller must lock mem_id_lock.
240 static int __mem_id_cyclic_get(gfp_t gfp)
246 id = ida_alloc_range(&mem_id_pool, mem_id_next, MEM_ID_MAX - 1, gfp);
249 /* Cyclic allocator, reset next id */
251 mem_id_next = MEM_ID_MIN;
255 return id; /* errno */
257 mem_id_next = id + 1;
262 static bool __is_supported_mem_type(enum xdp_mem_type type)
264 if (type == MEM_TYPE_PAGE_POOL)
265 return is_page_pool_compiled_in();
267 if (type >= MEM_TYPE_MAX)
273 static struct xdp_mem_allocator *__xdp_reg_mem_model(struct xdp_mem_info *mem,
274 enum xdp_mem_type type,
277 struct xdp_mem_allocator *xdp_alloc;
278 gfp_t gfp = GFP_KERNEL;
282 if (!__is_supported_mem_type(type))
283 return ERR_PTR(-EOPNOTSUPP);
288 if (type == MEM_TYPE_PAGE_POOL)
289 return ERR_PTR(-EINVAL); /* Setup time check page_pool req */
293 /* Delay init of rhashtable to save memory if feature isn't used */
295 mutex_lock(&mem_id_lock);
296 ret = __mem_id_init_hash_table();
297 mutex_unlock(&mem_id_lock);
304 xdp_alloc = kzalloc(sizeof(*xdp_alloc), gfp);
306 return ERR_PTR(-ENOMEM);
308 mutex_lock(&mem_id_lock);
309 id = __mem_id_cyclic_get(gfp);
315 xdp_alloc->mem = *mem;
316 xdp_alloc->allocator = allocator;
318 /* Insert allocator into ID lookup table */
319 ptr = rhashtable_insert_slow(mem_id_ht, &id, &xdp_alloc->node);
321 ida_free(&mem_id_pool, mem->id);
323 errno = PTR_ERR(ptr);
327 if (type == MEM_TYPE_PAGE_POOL)
328 page_pool_use_xdp_mem(allocator, mem_allocator_disconnect, mem);
330 mutex_unlock(&mem_id_lock);
334 mutex_unlock(&mem_id_lock);
336 return ERR_PTR(errno);
339 int xdp_reg_mem_model(struct xdp_mem_info *mem,
340 enum xdp_mem_type type, void *allocator)
342 struct xdp_mem_allocator *xdp_alloc;
344 xdp_alloc = __xdp_reg_mem_model(mem, type, allocator);
345 if (IS_ERR(xdp_alloc))
346 return PTR_ERR(xdp_alloc);
349 EXPORT_SYMBOL_GPL(xdp_reg_mem_model);
351 int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
352 enum xdp_mem_type type, void *allocator)
354 struct xdp_mem_allocator *xdp_alloc;
356 if (xdp_rxq->reg_state != REG_STATE_REGISTERED) {
357 WARN(1, "Missing register, driver bug");
361 xdp_alloc = __xdp_reg_mem_model(&xdp_rxq->mem, type, allocator);
362 if (IS_ERR(xdp_alloc))
363 return PTR_ERR(xdp_alloc);
365 if (trace_mem_connect_enabled() && xdp_alloc)
366 trace_mem_connect(xdp_alloc, xdp_rxq);
370 EXPORT_SYMBOL_GPL(xdp_rxq_info_reg_mem_model);
372 /* XDP RX runs under NAPI protection, and in different delivery error
373 * scenarios (e.g. queue full), it is possible to return the xdp_frame
374 * while still leveraging this protection. The @napi_direct boolean
375 * is used for those calls sites. Thus, allowing for faster recycling
376 * of xdp_frames/pages in those cases.
378 void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
379 struct xdp_buff *xdp)
384 case MEM_TYPE_PAGE_POOL:
385 page = virt_to_head_page(data);
386 if (napi_direct && xdp_return_frame_no_direct())
388 /* No need to check ((page->pp_magic & ~0x3UL) == PP_SIGNATURE)
389 * as mem->type knows this a page_pool page
391 page_pool_put_full_page(page->pp, page, napi_direct);
393 case MEM_TYPE_PAGE_SHARED:
394 page_frag_free(data);
396 case MEM_TYPE_PAGE_ORDER0:
397 page = virt_to_page(data); /* Assumes order0 page*/
400 case MEM_TYPE_XSK_BUFF_POOL:
401 /* NB! Only valid from an xdp_buff! */
405 /* Not possible, checked in xdp_rxq_info_reg_mem_model() */
406 WARN(1, "Incorrect XDP memory type (%d) usage", mem->type);
411 void xdp_return_frame(struct xdp_frame *xdpf)
413 struct skb_shared_info *sinfo;
416 if (likely(!xdp_frame_has_frags(xdpf)))
419 sinfo = xdp_get_shared_info_from_frame(xdpf);
420 for (i = 0; i < sinfo->nr_frags; i++) {
421 struct page *page = skb_frag_page(&sinfo->frags[i]);
423 __xdp_return(page_address(page), &xdpf->mem, false, NULL);
426 __xdp_return(xdpf->data, &xdpf->mem, false, NULL);
428 EXPORT_SYMBOL_GPL(xdp_return_frame);
430 void xdp_return_frame_rx_napi(struct xdp_frame *xdpf)
432 struct skb_shared_info *sinfo;
435 if (likely(!xdp_frame_has_frags(xdpf)))
438 sinfo = xdp_get_shared_info_from_frame(xdpf);
439 for (i = 0; i < sinfo->nr_frags; i++) {
440 struct page *page = skb_frag_page(&sinfo->frags[i]);
442 __xdp_return(page_address(page), &xdpf->mem, true, NULL);
445 __xdp_return(xdpf->data, &xdpf->mem, true, NULL);
447 EXPORT_SYMBOL_GPL(xdp_return_frame_rx_napi);
449 /* XDP bulk APIs introduce a defer/flush mechanism to return
450 * pages belonging to the same xdp_mem_allocator object
451 * (identified via the mem.id field) in bulk to optimize
452 * I-cache and D-cache.
453 * The bulk queue size is set to 16 to be aligned to how
454 * XDP_REDIRECT bulking works. The bulk is flushed when
455 * it is full or when mem.id changes.
456 * xdp_frame_bulk is usually stored/allocated on the function
457 * call-stack to avoid locking penalties.
459 void xdp_flush_frame_bulk(struct xdp_frame_bulk *bq)
461 struct xdp_mem_allocator *xa = bq->xa;
463 if (unlikely(!xa || !bq->count))
466 page_pool_put_page_bulk(xa->page_pool, bq->q, bq->count);
467 /* bq->xa is not cleared to save lookup, if mem.id same in next bulk */
470 EXPORT_SYMBOL_GPL(xdp_flush_frame_bulk);
472 /* Must be called with rcu_read_lock held */
473 void xdp_return_frame_bulk(struct xdp_frame *xdpf,
474 struct xdp_frame_bulk *bq)
476 struct xdp_mem_info *mem = &xdpf->mem;
477 struct xdp_mem_allocator *xa;
479 if (mem->type != MEM_TYPE_PAGE_POOL) {
480 xdp_return_frame(xdpf);
486 xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params);
491 if (bq->count == XDP_BULK_QUEUE_SIZE)
492 xdp_flush_frame_bulk(bq);
494 if (unlikely(mem->id != xa->mem.id)) {
495 xdp_flush_frame_bulk(bq);
496 bq->xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params);
499 if (unlikely(xdp_frame_has_frags(xdpf))) {
500 struct skb_shared_info *sinfo;
503 sinfo = xdp_get_shared_info_from_frame(xdpf);
504 for (i = 0; i < sinfo->nr_frags; i++) {
505 skb_frag_t *frag = &sinfo->frags[i];
507 bq->q[bq->count++] = skb_frag_address(frag);
508 if (bq->count == XDP_BULK_QUEUE_SIZE)
509 xdp_flush_frame_bulk(bq);
512 bq->q[bq->count++] = xdpf->data;
514 EXPORT_SYMBOL_GPL(xdp_return_frame_bulk);
516 void xdp_return_buff(struct xdp_buff *xdp)
518 struct skb_shared_info *sinfo;
521 if (likely(!xdp_buff_has_frags(xdp)))
524 sinfo = xdp_get_shared_info_from_buff(xdp);
525 for (i = 0; i < sinfo->nr_frags; i++) {
526 struct page *page = skb_frag_page(&sinfo->frags[i]);
528 __xdp_return(page_address(page), &xdp->rxq->mem, true, xdp);
531 __xdp_return(xdp->data, &xdp->rxq->mem, true, xdp);
533 EXPORT_SYMBOL_GPL(xdp_return_buff);
535 void xdp_attachment_setup(struct xdp_attachment_info *info,
536 struct netdev_bpf *bpf)
539 bpf_prog_put(info->prog);
540 info->prog = bpf->prog;
541 info->flags = bpf->flags;
543 EXPORT_SYMBOL_GPL(xdp_attachment_setup);
545 struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp)
547 unsigned int metasize, totsize;
548 void *addr, *data_to_copy;
549 struct xdp_frame *xdpf;
552 /* Clone into a MEM_TYPE_PAGE_ORDER0 xdp_frame. */
553 metasize = xdp_data_meta_unsupported(xdp) ? 0 :
554 xdp->data - xdp->data_meta;
555 totsize = xdp->data_end - xdp->data + metasize;
557 if (sizeof(*xdpf) + totsize > PAGE_SIZE)
560 page = dev_alloc_page();
564 addr = page_to_virt(page);
566 memset(xdpf, 0, sizeof(*xdpf));
568 addr += sizeof(*xdpf);
569 data_to_copy = metasize ? xdp->data_meta : xdp->data;
570 memcpy(addr, data_to_copy, totsize);
572 xdpf->data = addr + metasize;
573 xdpf->len = totsize - metasize;
575 xdpf->metasize = metasize;
576 xdpf->frame_sz = PAGE_SIZE;
577 xdpf->mem.type = MEM_TYPE_PAGE_ORDER0;
582 EXPORT_SYMBOL_GPL(xdp_convert_zc_to_xdp_frame);
584 /* Used by XDP_WARN macro, to avoid inlining WARN() in fast-path */
585 void xdp_warn(const char *msg, const char *func, const int line)
587 WARN(1, "XDP_WARN: %s(line:%d): %s\n", func, line, msg);
589 EXPORT_SYMBOL_GPL(xdp_warn);
591 int xdp_alloc_skb_bulk(void **skbs, int n_skb, gfp_t gfp)
593 n_skb = kmem_cache_alloc_bulk(net_hotdata.skbuff_cache, gfp, n_skb, skbs);
594 if (unlikely(!n_skb))
599 EXPORT_SYMBOL_GPL(xdp_alloc_skb_bulk);
601 struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf,
603 struct net_device *dev)
605 struct skb_shared_info *sinfo = xdp_get_shared_info_from_frame(xdpf);
606 unsigned int headroom, frame_size;
610 /* xdp frags frame */
611 if (unlikely(xdp_frame_has_frags(xdpf)))
612 nr_frags = sinfo->nr_frags;
614 /* Part of headroom was reserved to xdpf */
615 headroom = sizeof(*xdpf) + xdpf->headroom;
617 /* Memory size backing xdp_frame data already have reserved
618 * room for build_skb to place skb_shared_info in tailroom.
620 frame_size = xdpf->frame_sz;
622 hard_start = xdpf->data - headroom;
623 skb = build_skb_around(skb, hard_start, frame_size);
627 skb_reserve(skb, headroom);
628 __skb_put(skb, xdpf->len);
630 skb_metadata_set(skb, xdpf->metasize);
632 if (unlikely(xdp_frame_has_frags(xdpf)))
633 xdp_update_skb_shared_info(skb, nr_frags,
634 sinfo->xdp_frags_size,
635 nr_frags * xdpf->frame_sz,
636 xdp_frame_is_frag_pfmemalloc(xdpf));
638 /* Essential SKB info: protocol and skb->dev */
639 skb->protocol = eth_type_trans(skb, dev);
641 /* Optional SKB info, currently missing:
642 * - HW checksum info (skb->ip_summed)
643 * - HW RX hash (skb_set_hash)
644 * - RX ring dev queue index (skb_record_rx_queue)
647 if (xdpf->mem.type == MEM_TYPE_PAGE_POOL)
648 skb_mark_for_recycle(skb);
650 /* Allow SKB to reuse area used by xdp_frame */
651 xdp_scrub_frame(xdpf);
655 EXPORT_SYMBOL_GPL(__xdp_build_skb_from_frame);
657 struct sk_buff *xdp_build_skb_from_frame(struct xdp_frame *xdpf,
658 struct net_device *dev)
662 skb = kmem_cache_alloc(net_hotdata.skbuff_cache, GFP_ATOMIC);
666 memset(skb, 0, offsetof(struct sk_buff, tail));
668 return __xdp_build_skb_from_frame(xdpf, skb, dev);
670 EXPORT_SYMBOL_GPL(xdp_build_skb_from_frame);
672 struct xdp_frame *xdpf_clone(struct xdp_frame *xdpf)
674 unsigned int headroom, totalsize;
675 struct xdp_frame *nxdpf;
679 headroom = xdpf->headroom + sizeof(*xdpf);
680 totalsize = headroom + xdpf->len;
682 if (unlikely(totalsize > PAGE_SIZE))
684 page = dev_alloc_page();
687 addr = page_to_virt(page);
689 memcpy(addr, xdpf, totalsize);
692 nxdpf->data = addr + headroom;
693 nxdpf->frame_sz = PAGE_SIZE;
694 nxdpf->mem.type = MEM_TYPE_PAGE_ORDER0;
700 __bpf_kfunc_start_defs();
703 * bpf_xdp_metadata_rx_timestamp - Read XDP frame RX timestamp.
704 * @ctx: XDP context pointer.
705 * @timestamp: Return value pointer.
708 * * Returns 0 on success or ``-errno`` on error.
709 * * ``-EOPNOTSUPP`` : means device driver does not implement kfunc
710 * * ``-ENODATA`` : means no RX-timestamp available for this frame
712 __bpf_kfunc int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
718 * bpf_xdp_metadata_rx_hash - Read XDP frame RX hash.
719 * @ctx: XDP context pointer.
720 * @hash: Return value pointer.
721 * @rss_type: Return value pointer for RSS type.
723 * The RSS hash type (@rss_type) specifies what portion of packet headers NIC
724 * hardware used when calculating RSS hash value. The RSS type can be decoded
725 * via &enum xdp_rss_hash_type either matching on individual L3/L4 bits
726 * ``XDP_RSS_L*`` or by combined traditional *RSS Hashing Types*
727 * ``XDP_RSS_TYPE_L*``.
730 * * Returns 0 on success or ``-errno`` on error.
731 * * ``-EOPNOTSUPP`` : means device driver doesn't implement kfunc
732 * * ``-ENODATA`` : means no RX-hash available for this frame
734 __bpf_kfunc int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash,
735 enum xdp_rss_hash_type *rss_type)
741 * bpf_xdp_metadata_rx_vlan_tag - Get XDP packet outermost VLAN tag
742 * @ctx: XDP context pointer.
743 * @vlan_proto: Destination pointer for VLAN Tag protocol identifier (TPID).
744 * @vlan_tci: Destination pointer for VLAN TCI (VID + DEI + PCP)
746 * In case of success, ``vlan_proto`` contains *Tag protocol identifier (TPID)*,
747 * usually ``ETH_P_8021Q`` or ``ETH_P_8021AD``, but some networks can use
748 * custom TPIDs. ``vlan_proto`` is stored in **network byte order (BE)**
749 * and should be used as follows:
750 * ``if (vlan_proto == bpf_htons(ETH_P_8021Q)) do_something();``
752 * ``vlan_tci`` contains the remaining 16 bits of a VLAN tag.
753 * Driver is expected to provide those in **host byte order (usually LE)**,
754 * so the bpf program should not perform byte conversion.
755 * According to 802.1Q standard, *VLAN TCI (Tag control information)*
756 * is a bit field that contains:
757 * *VLAN identifier (VID)* that can be read with ``vlan_tci & 0xfff``,
758 * *Drop eligible indicator (DEI)* - 1 bit,
759 * *Priority code point (PCP)* - 3 bits.
760 * For detailed meaning of DEI and PCP, please refer to other sources.
763 * * Returns 0 on success or ``-errno`` on error.
764 * * ``-EOPNOTSUPP`` : device driver doesn't implement kfunc
765 * * ``-ENODATA`` : VLAN tag was not stripped or is not available
767 __bpf_kfunc int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
768 __be16 *vlan_proto, u16 *vlan_tci)
773 __bpf_kfunc_end_defs();
775 BTF_KFUNCS_START(xdp_metadata_kfunc_ids)
776 #define XDP_METADATA_KFUNC(_, __, name, ___) BTF_ID_FLAGS(func, name, KF_TRUSTED_ARGS)
777 XDP_METADATA_KFUNC_xxx
778 #undef XDP_METADATA_KFUNC
779 BTF_KFUNCS_END(xdp_metadata_kfunc_ids)
781 static const struct btf_kfunc_id_set xdp_metadata_kfunc_set = {
782 .owner = THIS_MODULE,
783 .set = &xdp_metadata_kfunc_ids,
786 BTF_ID_LIST(xdp_metadata_kfunc_ids_unsorted)
787 #define XDP_METADATA_KFUNC(name, _, str, __) BTF_ID(func, str)
788 XDP_METADATA_KFUNC_xxx
789 #undef XDP_METADATA_KFUNC
791 u32 bpf_xdp_metadata_kfunc_id(int id)
793 /* xdp_metadata_kfunc_ids is sorted and can't be used */
794 return xdp_metadata_kfunc_ids_unsorted[id];
797 bool bpf_dev_bound_kfunc_id(u32 btf_id)
799 return btf_id_set8_contains(&xdp_metadata_kfunc_ids, btf_id);
802 static int __init xdp_metadata_init(void)
804 return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_metadata_kfunc_set);
806 late_initcall(xdp_metadata_init);
808 void xdp_set_features_flag(struct net_device *dev, xdp_features_t val)
810 val &= NETDEV_XDP_ACT_MASK;
811 if (dev->xdp_features == val)
814 dev->xdp_features = val;
816 if (dev->reg_state == NETREG_REGISTERED)
817 call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev);
819 EXPORT_SYMBOL_GPL(xdp_set_features_flag);
821 void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg)
823 xdp_features_t val = (dev->xdp_features | NETDEV_XDP_ACT_NDO_XMIT);
826 val |= NETDEV_XDP_ACT_NDO_XMIT_SG;
827 xdp_set_features_flag(dev, val);
829 EXPORT_SYMBOL_GPL(xdp_features_set_redirect_target);
831 void xdp_features_clear_redirect_target(struct net_device *dev)
833 xdp_features_t val = dev->xdp_features;
835 val &= ~(NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_NDO_XMIT_SG);
836 xdp_set_features_flag(dev, val);
838 EXPORT_SYMBOL_GPL(xdp_features_clear_redirect_target);