selftests: bpf: centre kernel bpf objects under new subdir "progs"

At the moment, all kernel bpf objects are listed under BPF_OBJ_FILES.
Listing them manually sometimes causing patch conflict when people are
adding new testcases simultaneously.

It is better to centre all the related source files under a subdir
"progs", then auto-generate the object file list.

Suggested-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 437 deletions

diff --git a/tools/testing/selftests/bpf/test_lwt_seg6local.c b/tools/testing/selftests/bpf/test_lwt_seg6local.c
deleted file mode 100644
index 0575751bc1bc..000000000000
--- a/tools/testing/selftests/bpf/test_lwt_seg6local.c
+++ /dev/null
@@ -1,437 +0,0 @@
-#include <stddef.h>
-#include <inttypes.h>
-#include <errno.h>
-#include <linux/seg6_local.h>
-#include <linux/bpf.h>
-#include "bpf_helpers.h"
-#include "bpf_endian.h"
-
-#define bpf_printk(fmt, ...)				\
-({							\
-	char ____fmt[] = fmt;				\
-	bpf_trace_printk(____fmt, sizeof(____fmt),	\
-			##__VA_ARGS__);			\
-})
-
-/* Packet parsing state machine helpers. */
-#define cursor_advance(_cursor, _len) \
-	({ void *_tmp = _cursor; _cursor += _len; _tmp; })
-
-#define SR6_FLAG_ALERT (1 << 4)
-
-#define htonll(x) ((bpf_htonl(1)) == 1 ? (x) : ((uint64_t)bpf_htonl((x) & \
-				0xFFFFFFFF) << 32) | bpf_htonl((x) >> 32))
-#define ntohll(x) ((bpf_ntohl(1)) == 1 ? (x) : ((uint64_t)bpf_ntohl((x) & \
-				0xFFFFFFFF) << 32) | bpf_ntohl((x) >> 32))
-#define BPF_PACKET_HEADER __attribute__((packed))
-
-struct ip6_t {
-	unsigned int ver:4;
-	unsigned int priority:8;
-	unsigned int flow_label:20;
-	unsigned short payload_len;
-	unsigned char next_header;
-	unsigned char hop_limit;
-	unsigned long long src_hi;
-	unsigned long long src_lo;
-	unsigned long long dst_hi;
-	unsigned long long dst_lo;
-} BPF_PACKET_HEADER;
-
-struct ip6_addr_t {
-	unsigned long long hi;
-	unsigned long long lo;
-} BPF_PACKET_HEADER;
-
-struct ip6_srh_t {
-	unsigned char nexthdr;
-	unsigned char hdrlen;
-	unsigned char type;
-	unsigned char segments_left;
-	unsigned char first_segment;
-	unsigned char flags;
-	unsigned short tag;
-
-	struct ip6_addr_t segments[0];
-} BPF_PACKET_HEADER;
-
-struct sr6_tlv_t {
-	unsigned char type;
-	unsigned char len;
-	unsigned char value[0];
-} BPF_PACKET_HEADER;
-
-__attribute__((always_inline)) struct ip6_srh_t *get_srh(struct __sk_buff *skb)
-{
-	void *cursor, *data_end;
-	struct ip6_srh_t *srh;
-	struct ip6_t *ip;
-	uint8_t *ipver;
-
-	data_end = (void *)(long)skb->data_end;
-	cursor = (void *)(long)skb->data;
-	ipver = (uint8_t *)cursor;
-
-	if ((void *)ipver + sizeof(*ipver) > data_end)
-		return NULL;
-
-	if ((*ipver >> 4) != 6)
-		return NULL;
-
-	ip = cursor_advance(cursor, sizeof(*ip));
-	if ((void *)ip + sizeof(*ip) > data_end)
-		return NULL;
-
-	if (ip->next_header != 43)
-		return NULL;
-
-	srh = cursor_advance(cursor, sizeof(*srh));
-	if ((void *)srh + sizeof(*srh) > data_end)
-		return NULL;
-
-	if (srh->type != 4)
-		return NULL;
-
-	return srh;
-}
-
-__attribute__((always_inline))
-int update_tlv_pad(struct __sk_buff *skb, uint32_t new_pad,
-		   uint32_t old_pad, uint32_t pad_off)
-{
-	int err;
-
-	if (new_pad != old_pad) {
-		err = bpf_lwt_seg6_adjust_srh(skb, pad_off,
-					  (int) new_pad - (int) old_pad);
-		if (err)
-			return err;
-	}
-
-	if (new_pad > 0) {
-		char pad_tlv_buf[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-					0, 0, 0};
-		struct sr6_tlv_t *pad_tlv = (struct sr6_tlv_t *) pad_tlv_buf;
-
-		pad_tlv->type = SR6_TLV_PADDING;
-		pad_tlv->len = new_pad - 2;
-
-		err = bpf_lwt_seg6_store_bytes(skb, pad_off,
-					       (void *)pad_tlv_buf, new_pad);
-		if (err)
-			return err;
-	}
-
-	return 0;
-}
-
-__attribute__((always_inline))
-int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh,
-			  uint32_t *tlv_off, uint32_t *pad_size,
-			  uint32_t *pad_off)
-{
-	uint32_t srh_off, cur_off;
-	int offset_valid = 0;
-	int err;
-
-	srh_off = (char *)srh - (char *)(long)skb->data;
-	// cur_off = end of segments, start of possible TLVs
-	cur_off = srh_off + sizeof(*srh) +
-		sizeof(struct ip6_addr_t) * (srh->first_segment + 1);
-
-	*pad_off = 0;
-
-	// we can only go as far as ~10 TLVs due to the BPF max stack size
-	#pragma clang loop unroll(full)
-	for (int i = 0; i < 10; i++) {
-		struct sr6_tlv_t tlv;
-
-		if (cur_off == *tlv_off)
-			offset_valid = 1;
-
-		if (cur_off >= srh_off + ((srh->hdrlen + 1) << 3))
-			break;
-
-		err = bpf_skb_load_bytes(skb, cur_off, &tlv, sizeof(tlv));
-		if (err)
-			return err;
-
-		if (tlv.type == SR6_TLV_PADDING) {
-			*pad_size = tlv.len + sizeof(tlv);
-			*pad_off = cur_off;
-
-			if (*tlv_off == srh_off) {
-				*tlv_off = cur_off;
-				offset_valid = 1;
-			}
-			break;
-
-		} else if (tlv.type == SR6_TLV_HMAC) {
-			break;
-		}
-
-		cur_off += sizeof(tlv) + tlv.len;
-	} // we reached the padding or HMAC TLVs, or the end of the SRH
-
-	if (*pad_off == 0)
-		*pad_off = cur_off;
-
-	if (*tlv_off == -1)
-		*tlv_off = cur_off;
-	else if (!offset_valid)
-		return -EINVAL;
-
-	return 0;
-}
-
-__attribute__((always_inline))
-int add_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh, uint32_t tlv_off,
-	    struct sr6_tlv_t *itlv, uint8_t tlv_size)
-{
-	uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
-	uint8_t len_remaining, new_pad;
-	uint32_t pad_off = 0;
-	uint32_t pad_size = 0;
-	uint32_t partial_srh_len;
-	int err;
-
-	if (tlv_off != -1)
-		tlv_off += srh_off;
-
-	if (itlv->type == SR6_TLV_PADDING || itlv->type == SR6_TLV_HMAC)
-		return -EINVAL;
-
-	err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
-	if (err)
-		return err;
-
-	err = bpf_lwt_seg6_adjust_srh(skb, tlv_off, sizeof(*itlv) + itlv->len);
-	if (err)
-		return err;
-
-	err = bpf_lwt_seg6_store_bytes(skb, tlv_off, (void *)itlv, tlv_size);
-	if (err)
-		return err;
-
-	// the following can't be moved inside update_tlv_pad because the
-	// bpf verifier has some issues with it
-	pad_off += sizeof(*itlv) + itlv->len;
-	partial_srh_len = pad_off - srh_off;
-	len_remaining = partial_srh_len % 8;
-	new_pad = 8 - len_remaining;
-
-	if (new_pad == 1) // cannot pad for 1 byte only
-		new_pad = 9;
-	else if (new_pad == 8)
-		new_pad = 0;
-
-	return update_tlv_pad(skb, new_pad, pad_size, pad_off);
-}
-
-__attribute__((always_inline))
-int delete_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh,
-	       uint32_t tlv_off)
-{
-	uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
-	uint8_t len_remaining, new_pad;
-	uint32_t partial_srh_len;
-	uint32_t pad_off = 0;
-	uint32_t pad_size = 0;
-	struct sr6_tlv_t tlv;
-	int err;
-
-	tlv_off += srh_off;
-
-	err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
-	if (err)
-		return err;
-
-	err = bpf_skb_load_bytes(skb, tlv_off, &tlv, sizeof(tlv));
-	if (err)
-		return err;
-
-	err = bpf_lwt_seg6_adjust_srh(skb, tlv_off, -(sizeof(tlv) + tlv.len));
-	if (err)
-		return err;
-
-	pad_off -= sizeof(tlv) + tlv.len;
-	partial_srh_len = pad_off - srh_off;
-	len_remaining = partial_srh_len % 8;
-	new_pad = 8 - len_remaining;
-	if (new_pad == 1) // cannot pad for 1 byte only
-		new_pad = 9;
-	else if (new_pad == 8)
-		new_pad = 0;
-
-	return update_tlv_pad(skb, new_pad, pad_size, pad_off);
-}
-
-__attribute__((always_inline))
-int has_egr_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh)
-{
-	int tlv_offset = sizeof(struct ip6_t) + sizeof(struct ip6_srh_t) +
-		((srh->first_segment + 1) << 4);
-	struct sr6_tlv_t tlv;
-
-	if (bpf_skb_load_bytes(skb, tlv_offset, &tlv, sizeof(struct sr6_tlv_t)))
-		return 0;
-
-	if (tlv.type == SR6_TLV_EGRESS && tlv.len == 18) {
-		struct ip6_addr_t egr_addr;
-
-		if (bpf_skb_load_bytes(skb, tlv_offset + 4, &egr_addr, 16))
-			return 0;
-
-		// check if egress TLV value is correct
-		if (ntohll(egr_addr.hi) == 0xfd00000000000000 &&
-				ntohll(egr_addr.lo) == 0x4)
-			return 1;
-	}
-
-	return 0;
-}
-
-// This function will push a SRH with segments fd00::1, fd00::2, fd00::3,
-// fd00::4
-SEC("encap_srh")
-int __encap_srh(struct __sk_buff *skb)
-{
-	unsigned long long hi = 0xfd00000000000000;
-	struct ip6_addr_t *seg;
-	struct ip6_srh_t *srh;
-	char srh_buf[72]; // room for 4 segments
-	int err;
-
-	srh = (struct ip6_srh_t *)srh_buf;
-	srh->nexthdr = 0;
-	srh->hdrlen = 8;
-	srh->type = 4;
-	srh->segments_left = 3;
-	srh->first_segment = 3;
-	srh->flags = 0;
-	srh->tag = 0;
-
-	seg = (struct ip6_addr_t *)((char *)srh + sizeof(*srh));
-
-	#pragma clang loop unroll(full)
-	for (unsigned long long lo = 0; lo < 4; lo++) {
-		seg->lo = htonll(4 - lo);
-		seg->hi = htonll(hi);
-		seg = (struct ip6_addr_t *)((char *)seg + sizeof(*seg));
-	}
-
-	err = bpf_lwt_push_encap(skb, 0, (void *)srh, sizeof(srh_buf));
-	if (err)
-		return BPF_DROP;
-
-	return BPF_REDIRECT;
-}
-
-// Add an Egress TLV fc00::4, add the flag A,
-// and apply End.X action to fc42::1
-SEC("add_egr_x")
-int __add_egr_x(struct __sk_buff *skb)
-{
-	unsigned long long hi = 0xfc42000000000000;
-	unsigned long long lo = 0x1;
-	struct ip6_srh_t *srh = get_srh(skb);
-	uint8_t new_flags = SR6_FLAG_ALERT;
-	struct ip6_addr_t addr;
-	int err, offset;
-
-	if (srh == NULL)
-		return BPF_DROP;
-
-	uint8_t tlv[20] = {2, 18, 0, 0, 0xfd, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-			   0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4};
-
-	err = add_tlv(skb, srh, (srh->hdrlen+1) << 3,
-		      (struct sr6_tlv_t *)&tlv, 20);
-	if (err)
-		return BPF_DROP;
-
-	offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, flags);
-	err = bpf_lwt_seg6_store_bytes(skb, offset,
-				       (void *)&new_flags, sizeof(new_flags));
-	if (err)
-		return BPF_DROP;
-
-	addr.lo = htonll(lo);
-	addr.hi = htonll(hi);
-	err = bpf_lwt_seg6_action(skb, SEG6_LOCAL_ACTION_END_X,
-				  (void *)&addr, sizeof(addr));
-	if (err)
-		return BPF_DROP;
-	return BPF_REDIRECT;
-}
-
-// Pop the Egress TLV, reset the flags, change the tag 2442 and finally do a
-// simple End action
-SEC("pop_egr")
-int __pop_egr(struct __sk_buff *skb)
-{
-	struct ip6_srh_t *srh = get_srh(skb);
-	uint16_t new_tag = bpf_htons(2442);
-	uint8_t new_flags = 0;
-	int err, offset;
-
-	if (srh == NULL)
-		return BPF_DROP;
-
-	if (srh->flags != SR6_FLAG_ALERT)
-		return BPF_DROP;
-
-	if (srh->hdrlen != 11) // 4 segments + Egress TLV + Padding TLV
-		return BPF_DROP;
-
-	if (!has_egr_tlv(skb, srh))
-		return BPF_DROP;
-
-	err = delete_tlv(skb, srh, 8 + (srh->first_segment + 1) * 16);
-	if (err)
-		return BPF_DROP;
-
-	offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, flags);
-	if (bpf_lwt_seg6_store_bytes(skb, offset, (void *)&new_flags,
-				     sizeof(new_flags)))
-		return BPF_DROP;
-
-	offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, tag);
-	if (bpf_lwt_seg6_store_bytes(skb, offset, (void *)&new_tag,
-				     sizeof(new_tag)))
-		return BPF_DROP;
-
-	return BPF_OK;
-}
-
-// Inspect if the Egress TLV and flag have been removed, if the tag is correct,
-// then apply a End.T action to reach the last segment
-SEC("inspect_t")
-int __inspect_t(struct __sk_buff *skb)
-{
-	struct ip6_srh_t *srh = get_srh(skb);
-	int table = 117;
-	int err;
-
-	if (srh == NULL)
-		return BPF_DROP;
-
-	if (srh->flags != 0)
-		return BPF_DROP;
-
-	if (srh->tag != bpf_htons(2442))
-		return BPF_DROP;
-
-	if (srh->hdrlen != 8) // 4 segments
-		return BPF_DROP;
-
-	err = bpf_lwt_seg6_action(skb, SEG6_LOCAL_ACTION_END_T,
-				  (void *)&table, sizeof(table));
-
-	if (err)
-		return BPF_DROP;
-
-	return BPF_REDIRECT;
-}
-
-char __license[] SEC("license") = "GPL";