busybox: Fix tc applet build when using kernel 6.8+

We now have 6.9 kernel headers in master which means
busybox builds with CONFIG_TC will fail to build due
to CBQ being dropped in kernel 6.8+

Apply a fix which is reported upstream

(From OE-Core rev: 3afbeb1ea418a69a452e82cbce00c36452b75f1e)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 62 insertions, 0 deletions

diff --git a/meta/recipes-core/busybox/busybox/busybox-1.36.1-no-cbq.patch b/meta/recipes-core/busybox/busybox/busybox-1.36.1-no-cbq.patch
new file mode 100644
index 0000000000..80cbc73fc4
--- /dev/null
+++ b/meta/recipes-core/busybox/busybox/busybox-1.36.1-no-cbq.patch
@@ -0,0 +1,61 @@
+Remove CBQ functionality from tc
+
+6.8+ kernel has dropped CBQ support [1], Now that OE uses 6.9 for
+kernel-headers means we are hitting the undefined symbol
+TCA_CBQ_MAX [2]  
+
+[1] https://github.com/torvalds/linux/commit/33241dca486264193ed68167c8eeae1fb197f3df
+[2] https://bugs.busybox.net/show_bug.cgi?id=15934
+
+Upstream-Status: Submitted [https://bugs.busybox.net/show_bug.cgi?id=15931]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+diff -up busybox-1.36.1/networking/tc.c.no-cbq busybox-1.36.1/networking/tc.c
+--- busybox-1.36.1/networking/tc.c.no-cbq       2024-01-29 10:24:09.135082923 -0500
++++ busybox-1.36.1/networking/tc.c      2024-01-29 10:28:12.009502552 -0500
+@@ -31,7 +31,7 @@
+ //usage:       "qdisc [handle QHANDLE] [root|"IF_FEATURE_TC_INGRESS("ingress|")"parent CLASSID]\n"
+ /* //usage: "[estimator INTERVAL TIME_CONSTANT]\n" */
+ //usage:       "       [[QDISC_KIND] [help|OPTIONS]]\n"
+-//usage:       "       QDISC_KIND := [p|b]fifo|tbf|prio|cbq|red|etc.\n"
++//usage:       "       QDISC_KIND := [p|b]fifo|tbf|prio|red|etc.\n"
+ //usage:       "qdisc show [dev STRING]"IF_FEATURE_TC_INGRESS(" [ingress]")"\n"
+ //usage:       "class [classid CLASSID] [root|parent CLASSID]\n"
+ //usage:       "       [[QDISC_KIND] [help|OPTIONS] ]\n"
+@@ -230,7 +230,7 @@ static int cbq_parse_opt(int argc, char
+ {
+        return 0;
+ }
+-#endif
++
+ static int cbq_print_opt(struct rtattr *opt)
+ {
+        struct rtattr *tb[TCA_CBQ_MAX+1];
+@@ -322,6 +322,7 @@ static int cbq_print_opt(struct rtattr *
+  done:
+        return 0;
+ }
++#endif
+ 
+ static FAST_FUNC int print_qdisc(
+                const struct sockaddr_nl *who UNUSED_PARAM,
+@@ -373,7 +374,8 @@ static FAST_FUNC int print_qdisc(
+                if (qqq == 0) { /* pfifo_fast aka prio */
+                        prio_print_opt(tb[TCA_OPTIONS]);
+                } else if (qqq == 1) { /* class based queuing */
+-                       cbq_print_opt(tb[TCA_OPTIONS]);
++                       /* cbq_print_opt(tb[TCA_OPTIONS]); */
++                       printf("cbq not supported");
+                } else {
+                        /* don't know how to print options for this qdisc */
+                        printf("(options for %s)", name);
+@@ -444,7 +446,8 @@ static FAST_FUNC int print_class(
+                        /* nothing. */ /*prio_print_opt(tb[TCA_OPTIONS]);*/
+                } else if (qqq == 1) { /* class based queuing */
+                        /* cbq_print_copt() is identical to cbq_print_opt(). */
+-                       cbq_print_opt(tb[TCA_OPTIONS]);
++                       /* cbq_print_opt(tb[TCA_OPTIONS]); */
++                       printf("cbq not supported");
+                } else {
+                        /* don't know how to print options for this class */
+                        printf("(options for %s)", name);
diff --git a/meta/recipes-core/busybox/busybox_1.36.1.bb b/meta/recipes-core/busybox/busybox_1.36.1.bb
index 7ce57bb0d0..67bc5c0cad 100644
--- a/meta/recipes-core/busybox/busybox_1.36.1.bb
+++ b/meta/recipes-core/busybox/busybox_1.36.1.bb
@@ -52,6 +52,7 @@ SRC_URI = "https://busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://CVE-2021-42380.patch \
            file://0001-awk-fix-segfault-when-compiled-by-clang.patch \
            file://CVE-2023-42363.patch \
+           file://busybox-1.36.1-no-cbq.patch \
            "
 SRC_URI:append:libc-musl = " file://musl.cfg "
 # TODO http://lists.busybox.net/pipermail/busybox/2023-January/090078.html