ci: add xdp_bonding fixes from bpf/master

bpf tree has fixes for xdp_bonding selftests which are not yet in
bpf-next, so add them as temporary CI-only patches.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

ci/diffs/0001-selftests-bpf-test-case-for-callback_depth-states-pr.patch

@@ -0,0 +1,129 @@
+From 5c2bc5e2f81d3344095ae241032dde20a4ea2b48 Mon Sep 17 00:00:00 2001
+From: Eduard Zingerman <eddyz87@gmail.com>
+Date: Thu, 22 Feb 2024 17:41:21 +0200
+Subject: [PATCH 1/2] selftests/bpf: test case for callback_depth states
+ pruning logic
+
+The test case was minimized from mailing list discussion [0].
+It is equivalent to the following C program:
+
+    struct iter_limit_bug_ctx { __u64 a; __u64 b; __u64 c; };
+
+    static __naked void iter_limit_bug_cb(void)
+    {
+    	switch (bpf_get_prandom_u32()) {
+    	case 1:  ctx->a = 42; break;
+    	case 2:  ctx->b = 42; break;
+    	default: ctx->c = 42; break;
+    	}
+    }
+
+    int iter_limit_bug(struct __sk_buff *skb)
+    {
+    	struct iter_limit_bug_ctx ctx = { 7, 7, 7 };
+
+    	bpf_loop(2, iter_limit_bug_cb, &ctx, 0);
+    	if (ctx.a == 42 && ctx.b == 42 && ctx.c == 7)
+    	  asm volatile("r1 /= 0;":::"r1");
+    	return 0;
+    }
+
+The main idea is that each loop iteration changes one of the state
+variables in a non-deterministic manner. Hence it is premature to
+prune the states that have two iterations left comparing them to
+states with one iteration left.
+E.g. {{7,7,7}, callback_depth=0} can reach state {42,42,7},
+while {{7,7,7}, callback_depth=1} can't.
+
+[0] https://lore.kernel.org/bpf/9b251840-7cb8-4d17-bd23-1fc8071d8eef@linux.dev/
+
+Acked-by: Yonghong Song <yonghong.song@linux.dev>
+Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
+Link: https://lore.kernel.org/r/20240222154121.6991-3-eddyz87@gmail.com
+Signed-off-by: Alexei Starovoitov <ast@kernel.org>
+---
+ .../bpf/progs/verifier_iterating_callbacks.c  | 70 +++++++++++++++++++
+ 1 file changed, 70 insertions(+)
+
+diff --git a/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c b/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
+index 5905e036e0ea..a955a6358206 100644
+--- a/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
++++ b/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
+@@ -239,4 +239,74 @@ int bpf_loop_iter_limit_nested(void *unused)
+ 	return 1000 * a + b + c;
+ }
+
++struct iter_limit_bug_ctx {
++	__u64 a;
++	__u64 b;
++	__u64 c;
++};
++
++static __naked void iter_limit_bug_cb(void)
++{
++	/* This is the same as C code below, but written
++	 * in assembly to control which branches are fall-through.
++	 *
++	 *   switch (bpf_get_prandom_u32()) {
++	 *   case 1:  ctx->a = 42; break;
++	 *   case 2:  ctx->b = 42; break;
++	 *   default: ctx->c = 42; break;
++	 *   }
++	 */
++	asm volatile (
++	"r9 = r2;"
++	"call %[bpf_get_prandom_u32];"
++	"r1 = r0;"
++	"r2 = 42;"
++	"r0 = 0;"
++	"if r1 == 0x1 goto 1f;"
++	"if r1 == 0x2 goto 2f;"
++	"*(u64 *)(r9 + 16) = r2;"
++	"exit;"
++	"1: *(u64 *)(r9 + 0) = r2;"
++	"exit;"
++	"2: *(u64 *)(r9 + 8) = r2;"
++	"exit;"
++	:
++	: __imm(bpf_get_prandom_u32)
++	: __clobber_all
++	);
++}
++
++SEC("tc")
++__failure
++__flag(BPF_F_TEST_STATE_FREQ)
++int iter_limit_bug(struct __sk_buff *skb)
++{
++	struct iter_limit_bug_ctx ctx = { 7, 7, 7 };
++
++	bpf_loop(2, iter_limit_bug_cb, &ctx, 0);
++
++	/* This is the same as C code below,
++	 * written in assembly to guarantee checks order.
++	 *
++	 *   if (ctx.a == 42 && ctx.b == 42 && ctx.c == 7)
++	 *     asm volatile("r1 /= 0;":::"r1");
++	 */
++	asm volatile (
++	"r1 = *(u64 *)%[ctx_a];"
++	"if r1 != 42 goto 1f;"
++	"r1 = *(u64 *)%[ctx_b];"
++	"if r1 != 42 goto 1f;"
++	"r1 = *(u64 *)%[ctx_c];"
++	"if r1 != 7 goto 1f;"
++	"r1 /= 0;"
++	"1:"
++	:
++	: [ctx_a]"m"(ctx.a),
++	  [ctx_b]"m"(ctx.b),
++	  [ctx_c]"m"(ctx.c)
++	: "r1"
++	);
++	return 0;
++}
++
+ char _license[] SEC("license") = "GPL";
+-- 
+2.43.0
+

ci/diffs/0002-xdp-bonding-Fix-feature-flags-when-there-are-no-slav.patch

@@ -0,0 +1,56 @@
+From f267f262815033452195f46c43b572159262f533 Mon Sep 17 00:00:00 2001
+From: Daniel Borkmann <daniel@iogearbox.net>
+Date: Tue, 5 Mar 2024 10:08:28 +0100
+Subject: [PATCH 2/2] xdp, bonding: Fix feature flags when there are no slave
+ devs anymore
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Commit 9b0ed890ac2a ("bonding: do not report NETDEV_XDP_ACT_XSK_ZEROCOPY")
+changed the driver from reporting everything as supported before a device
+was bonded into having the driver report that no XDP feature is supported
+until a real device is bonded as it seems to be more truthful given
+eventually real underlying devices decide what XDP features are supported.
+
+The change however did not take into account when all slave devices get
+removed from the bond device. In this case after 9b0ed890ac2a, the driver
+keeps reporting a feature mask of 0x77, that is, NETDEV_XDP_ACT_MASK &
+~NETDEV_XDP_ACT_XSK_ZEROCOPY whereas it should have reported a feature
+mask of 0.
+
+Fix it by resetting XDP feature flags in the same way as if no XDP program
+is attached to the bond device. This was uncovered by the XDP bond selftest
+which let BPF CI fail. After adjusting the starting masks on the latter
+to 0 instead of NETDEV_XDP_ACT_MASK the test passes again together with
+this fix.
+
+Fixes: 9b0ed890ac2a ("bonding: do not report NETDEV_XDP_ACT_XSK_ZEROCOPY")
+Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
+Cc: Magnus Karlsson <magnus.karlsson@intel.com>
+Cc: Prashant Batra <prbatra.mail@gmail.com>
+Cc: Toke Høiland-Jørgensen <toke@redhat.com>
+Cc: Jakub Kicinski <kuba@kernel.org>
+Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
+Message-ID: <20240305090829.17131-1-daniel@iogearbox.net>
+Signed-off-by: Alexei Starovoitov <ast@kernel.org>
+---
+ drivers/net/bonding/bond_main.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
+index a11748b8d69b..cd0683bcca03 100644
+--- a/drivers/net/bonding/bond_main.c
++++ b/drivers/net/bonding/bond_main.c
+@@ -1811,7 +1811,7 @@ void bond_xdp_set_features(struct net_device *bond_dev)
+
+ 	ASSERT_RTNL();
+
+-	if (!bond_xdp_check(bond)) {
++	if (!bond_xdp_check(bond) || !bond_has_slaves(bond)) {
+ 		xdp_clear_features_flag(bond_dev);
+ 		return;
+ 	}
+-- 
+2.43.0
+