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Fwd: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration

Matthieu Baerts posted 1 patch 3 months ago
Failed in applying to current master (apply log)
include/linux/bpf.h               |  33 +++++++---
include/linux/btf.h               |  12 ++++
kernel/bpf/bpf_struct_ops.c       | 100 ++++--------------------------
kernel/bpf/bpf_struct_ops_types.h |  12 ----
kernel/bpf/btf.c                  |  84 +++++++++++++++++++++++--
net/bpf/bpf_dummy_struct_ops.c    |  11 +++-
net/ipv4/bpf_tcp_ca.c             |  12 +++-
7 files changed, 146 insertions(+), 118 deletions(-)
delete mode 100644 kernel/bpf/bpf_struct_ops_types.h
Fwd: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
Posted by Matthieu Baerts 3 months ago 
Hi Geliang,

This is just to let you know that I had to modify two commits you made
to sync with upstream changes (see the patch below):

- a93c47792fc3: conflict in t/mptcp-add-bpf_mptcp_sched_ops
- 8ac5b9528258: mptcp: bpf: adapt code to match upstream changes
- ebd80ac09e97: conflict in t/bpf-Add-bpf_mptcp_sched_kfunc_set

Please see the new version of these two commits from our 'export' branch:

ff544a232510 ("bpf: Add bpf_mptcp_sched_ops")
66dfa335e74b ("bpf: Add bpf_mptcp_sched_kfunc_set")

Do you mind checking that everything is OK for you, please?

Cheers,
Matt


-------- Forwarded Message --------
Subject: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
Date: Fri, 19 Jan 2024 14:50:02 -0800
From: thinker.li@gmail.com
To: bpf@vger.kernel.org, ast@kernel.org, martin.lau@linux.dev,
song@kernel.org, kernel-team@meta.com, andrii@kernel.org, drosen@google.com
CC: sinquersw@gmail.com, kuifeng@meta.com, Kui-Feng Lee
<thinker.li@gmail.com>, netdev@vger.kernel.org

From: Kui-Feng Lee <thinker.li@gmail.com>

Replace the static list of struct_ops types with per-btf struct_ops_tab to
enable dynamic registration.

Both bpf_dummy_ops and bpf_tcp_ca now utilize the registration function
instead of being listed in bpf_struct_ops_types.h.

Cc: netdev@vger.kernel.org
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
---
 include/linux/bpf.h               |  33 +++++++---
 include/linux/btf.h               |  12 ++++
 kernel/bpf/bpf_struct_ops.c       | 100 ++++--------------------------
 kernel/bpf/bpf_struct_ops_types.h |  12 ----
 kernel/bpf/btf.c                  |  84 +++++++++++++++++++++++--
 net/bpf/bpf_dummy_struct_ops.c    |  11 +++-
 net/ipv4/bpf_tcp_ca.c             |  12 +++-
 7 files changed, 146 insertions(+), 118 deletions(-)
 delete mode 100644 kernel/bpf/bpf_struct_ops_types.h

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 90f78f04e139..085070ea3021 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1700,10 +1700,22 @@ struct bpf_struct_ops_common_value {
 	enum bpf_struct_ops_state state;
 };
 +/* This macro helps developer to register a struct_ops type and generate
+ * type information correctly. Developers should use this macro to register
+ * a struct_ops type instead of calling __register_bpf_struct_ops()
directly.
+ */
+#define register_bpf_struct_ops(st_ops, type)				\
+	({								\
+		struct bpf_struct_ops_##type {				\
+			struct bpf_struct_ops_common_value common;	\
+			struct type data ____cacheline_aligned_in_smp;	\
+		};							\
+		BTF_TYPE_EMIT(struct bpf_struct_ops_##type);		\
+		__register_bpf_struct_ops(st_ops);			\
+	})
+
 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
-const struct bpf_struct_ops_desc *bpf_struct_ops_find(struct btf *btf,
u32 type_id);
-void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
 bool bpf_struct_ops_get(const void *kdata);
 void bpf_struct_ops_put(const void *kdata);
 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
@@ -1745,16 +1757,11 @@ struct bpf_dummy_ops {
 int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr
*kattr,
 			    union bpf_attr __user *uattr);
 #endif
+int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
+			     struct btf *btf,
+			     struct bpf_verifier_log *log);
 void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct
bpf_map *map);
 #else
-static inline const struct bpf_struct_ops_desc
*bpf_struct_ops_find(struct btf *btf, u32 type_id)
-{
-	return NULL;
-}
-static inline void bpf_struct_ops_init(struct btf *btf,
-				       struct bpf_verifier_log *log)
-{
-}
 static inline bool bpf_try_module_get(const void *data, struct module
*owner)
 {
 	return try_module_get(owner);
@@ -1792,6 +1799,12 @@ static inline int
bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
 static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
 {
 }
+static inline int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc
*st_ops_desc,
+					   struct btf *btf,
+					   struct bpf_verifier_log *log) {
+	return -EOPNOTSUPP;
+}
+
 #endif
  struct bpf_array {
diff --git a/include/linux/btf.h b/include/linux/btf.h
index 1d852dad7473..714801a382fd 100644
--- a/include/linux/btf.h
+++ b/include/linux/btf.h
@@ -496,6 +496,7 @@ static inline void *btf_id_set8_contains(const
struct btf_id_set8 *set, u32 id)
 }
  struct bpf_verifier_log;
+struct bpf_struct_ops;
  #ifdef CONFIG_BPF_SYSCALL
 const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);
@@ -520,6 +521,9 @@ btf_get_prog_ctx_type(struct bpf_verifier_log *log,
const struct btf *btf,
 int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum
bpf_prog_type prog_type);
 bool btf_types_are_same(const struct btf *btf1, u32 id1,
 			const struct btf *btf2, u32 id2);
+int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops);
+const struct bpf_struct_ops_desc *bpf_struct_ops_find_value(struct btf
*btf, u32 value_id);
+const struct bpf_struct_ops_desc *bpf_struct_ops_find(struct btf *btf,
u32 type_id);
 #else
 static inline const struct btf_type *btf_type_by_id(const struct btf *btf,
 						    u32 type_id)
@@ -572,6 +576,14 @@ static inline bool btf_types_are_same(const struct
btf *btf1, u32 id1,
 {
 	return false;
 }
+static inline int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops)
+{
+	return -ENOTSUPP;
+}
+static inline const struct bpf_struct_ops_desc
*bpf_struct_ops_find(struct btf *btf, u32 type_id)
+{
+	return NULL;
+}
 #endif
  static inline bool btf_type_is_struct_ptr(struct btf *btf, const
struct btf_type *t)
diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c
index 30ab34fab0f8..defc052e4622 100644
--- a/kernel/bpf/bpf_struct_ops.c
+++ b/kernel/bpf/bpf_struct_ops.c
@@ -62,35 +62,6 @@ static DEFINE_MUTEX(update_mutex);
 #define VALUE_PREFIX "bpf_struct_ops_"
 #define VALUE_PREFIX_LEN (sizeof(VALUE_PREFIX) - 1)
 -/* bpf_struct_ops_##_name (e.g. bpf_struct_ops_tcp_congestion_ops) is
- * the map's value exposed to the userspace and its btf-type-id is
- * stored at the map->btf_vmlinux_value_type_id.
- *
- */
-#define BPF_STRUCT_OPS_TYPE(_name)				\
-extern struct bpf_struct_ops bpf_##_name;			\
-								\
-struct bpf_struct_ops_##_name {					\
-	struct bpf_struct_ops_common_value common;		\
-	struct _name data ____cacheline_aligned_in_smp;		\
-};
-#include "bpf_struct_ops_types.h"
-#undef BPF_STRUCT_OPS_TYPE
-
-enum {
-#define BPF_STRUCT_OPS_TYPE(_name) BPF_STRUCT_OPS_TYPE_##_name,
-#include "bpf_struct_ops_types.h"
-#undef BPF_STRUCT_OPS_TYPE
-	__NR_BPF_STRUCT_OPS_TYPE,
-};
-
-static struct bpf_struct_ops_desc bpf_struct_ops[] = {
-#define BPF_STRUCT_OPS_TYPE(_name)				\
-	[BPF_STRUCT_OPS_TYPE_##_name] = { .st_ops = &bpf_##_name },
-#include "bpf_struct_ops_types.h"
-#undef BPF_STRUCT_OPS_TYPE
-};
-
 const struct bpf_verifier_ops bpf_struct_ops_verifier_ops = {
 };
 @@ -145,9 +116,9 @@ static bool is_valid_value_type(struct btf *btf,
s32 value_id,
 	return true;
 }
 -static void bpf_struct_ops_desc_init(struct bpf_struct_ops_desc
*st_ops_desc,
-				     struct btf *btf,
-				     struct bpf_verifier_log *log)
+int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
+			     struct btf *btf,
+			     struct bpf_verifier_log *log)
 {
 	struct bpf_struct_ops *st_ops = st_ops_desc->st_ops;
 	const struct btf_member *member;
@@ -161,7 +132,7 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 	    sizeof(value_name)) {
 		pr_warn("struct_ops name %s is too long\n",
 			st_ops->name);
-		return;
+		return -EINVAL;
 	}
 	sprintf(value_name, "%s%s", VALUE_PREFIX, st_ops->name);
 @@ -170,13 +141,13 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 	if (type_id < 0) {
 		pr_warn("Cannot find struct %s in %s\n",
 			st_ops->name, btf_get_name(btf));
-		return;
+		return -EINVAL;
 	}
 	t = btf_type_by_id(btf, type_id);
 	if (btf_type_vlen(t) > BPF_STRUCT_OPS_MAX_NR_MEMBERS) {
 		pr_warn("Cannot support #%u members in struct %s\n",
 			btf_type_vlen(t), st_ops->name);
-		return;
+		return -EINVAL;
 	}
  	value_id = btf_find_by_name_kind(btf, value_name,
@@ -184,10 +155,10 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 	if (value_id < 0) {
 		pr_warn("Cannot find struct %s in %s\n",
 			value_name, btf_get_name(btf));
-		return;
+		return -EINVAL;
 	}
 	if (!is_valid_value_type(btf, value_id, t, value_name))
-		return;
+		return -EINVAL;
  	for_each_member(i, t, member) {
 		const struct btf_type *func_proto;
@@ -196,13 +167,13 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 		if (!*mname) {
 			pr_warn("anon member in struct %s is not supported\n",
 				st_ops->name);
-			break;
+			return -EOPNOTSUPP;
 		}
  		if (__btf_member_bitfield_size(t, member)) {
 			pr_warn("bit field member %s in struct %s is not supported\n",
 				mname, st_ops->name);
-			break;
+			return -EOPNOTSUPP;
 		}
  		func_proto = btf_type_resolve_func_ptr(btf,
@@ -214,7 +185,7 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 					   &st_ops->func_models[i])) {
 			pr_warn("Error in parsing func ptr %s in struct %s\n",
 				mname, st_ops->name);
-			break;
+			return -EINVAL;
 		}
 	}
 @@ -222,6 +193,7 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 		if (st_ops->init(btf)) {
 			pr_warn("Error in init bpf_struct_ops %s\n",
 				st_ops->name);
+			return -EINVAL;
 		} else {
 			st_ops_desc->type_id = type_id;
 			st_ops_desc->type = t;
@@ -230,54 +202,8 @@ static void bpf_struct_ops_desc_init(struct
bpf_struct_ops_desc *st_ops_desc,
 								 value_id);
 		}
 	}
-}
 -void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log)
-{
-	struct bpf_struct_ops_desc *st_ops_desc;
-	u32 i;
-
-	/* Ensure BTF type is emitted for "struct bpf_struct_ops_##_name" */
-#define BPF_STRUCT_OPS_TYPE(_name) BTF_TYPE_EMIT(struct
bpf_struct_ops_##_name);
-#include "bpf_struct_ops_types.h"
-#undef BPF_STRUCT_OPS_TYPE
-
-	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
-		st_ops_desc = &bpf_struct_ops[i];
-		bpf_struct_ops_desc_init(st_ops_desc, btf, log);
-	}
-}
-
-static const struct bpf_struct_ops_desc *
-bpf_struct_ops_find_value(struct btf *btf, u32 value_id)
-{
-	unsigned int i;
-
-	if (!value_id || !btf)
-		return NULL;
-
-	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
-		if (bpf_struct_ops[i].value_id == value_id)
-			return &bpf_struct_ops[i];
-	}
-
-	return NULL;
-}
-
-const struct bpf_struct_ops_desc *
-bpf_struct_ops_find(struct btf *btf, u32 type_id)
-{
-	unsigned int i;
-
-	if (!type_id || !btf)
-		return NULL;
-
-	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
-		if (bpf_struct_ops[i].type_id == type_id)
-			return &bpf_struct_ops[i];
-	}
-
-	return NULL;
+	return 0;
 }
  static int bpf_struct_ops_map_get_next_key(struct bpf_map *map, void *key,
diff --git a/kernel/bpf/bpf_struct_ops_types.h
b/kernel/bpf/bpf_struct_ops_types.h
deleted file mode 100644
index 5678a9ddf817..000000000000
--- a/kernel/bpf/bpf_struct_ops_types.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* internal file - do not include directly */
-
-#ifdef CONFIG_BPF_JIT
-#ifdef CONFIG_NET
-BPF_STRUCT_OPS_TYPE(bpf_dummy_ops)
-#endif
-#ifdef CONFIG_INET
-#include <net/tcp.h>
-BPF_STRUCT_OPS_TYPE(tcp_congestion_ops)
-#endif
-#endif
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 3fa84c44b882..78eacd4aa362 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -19,6 +19,7 @@
 #include <linux/bpf_verifier.h>
 #include <linux/btf.h>
 #include <linux/btf_ids.h>
+#include <linux/bpf.h>
 #include <linux/bpf_lsm.h>
 #include <linux/skmsg.h>
 #include <linux/perf_event.h>
@@ -5792,8 +5793,6 @@ struct btf *btf_parse_vmlinux(void)
 	/* btf_parse_vmlinux() runs under bpf_verifier_lock */
 	bpf_ctx_convert.t = btf_type_by_id(btf, bpf_ctx_convert_btf_id[0]);
 -	bpf_struct_ops_init(btf, log);
-
 	refcount_set(&btf->refcnt, 1);
  	err = btf_alloc_id(btf);
@@ -8489,10 +8488,11 @@ bool btf_type_ids_nocast_alias(struct
bpf_verifier_log *log,
 }
  static int
-btf_add_struct_ops(struct btf *btf, struct bpf_struct_ops *st_ops)
+btf_add_struct_ops(struct btf *btf, struct bpf_struct_ops *st_ops,
+		   struct bpf_verifier_log *log)
 {
 	struct btf_struct_ops_tab *tab, *new_tab;
-	int i;
+	int i, err;
  	if (!btf)
 		return -ENOENT;
@@ -8529,7 +8529,83 @@ btf_add_struct_ops(struct btf *btf, struct
bpf_struct_ops *st_ops)
  	tab->ops[btf->struct_ops_tab->cnt].st_ops = st_ops;
 +	err = bpf_struct_ops_desc_init(&tab->ops[btf->struct_ops_tab->cnt],
btf, log);
+	if (err)
+		return err;
+
 	btf->struct_ops_tab->cnt++;
  	return 0;
 }
+
+const struct bpf_struct_ops_desc *
+bpf_struct_ops_find_value(struct btf *btf, u32 value_id)
+{
+	const struct bpf_struct_ops_desc *st_ops_list;
+	unsigned int i;
+	u32 cnt;
+
+	if (!value_id)
+		return NULL;
+	if (!btf->struct_ops_tab)
+		return NULL;
+
+	cnt = btf->struct_ops_tab->cnt;
+	st_ops_list = btf->struct_ops_tab->ops;
+	for (i = 0; i < cnt; i++) {
+		if (st_ops_list[i].value_id == value_id)
+			return &st_ops_list[i];
+	}
+
+	return NULL;
+}
+
+const struct bpf_struct_ops_desc *
+bpf_struct_ops_find(struct btf *btf, u32 type_id)
+{
+	const struct bpf_struct_ops_desc *st_ops_list;
+	unsigned int i;
+	u32 cnt;
+
+	if (!type_id)
+		return NULL;
+	if (!btf->struct_ops_tab)
+		return NULL;
+
+	cnt = btf->struct_ops_tab->cnt;
+	st_ops_list = btf->struct_ops_tab->ops;
+	for (i = 0; i < cnt; i++) {
+		if (st_ops_list[i].type_id == type_id)
+			return &st_ops_list[i];
+	}
+
+	return NULL;
+}
+
+int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops)
+{
+	struct bpf_verifier_log *log;
+	struct btf *btf;
+	int err = 0;
+
+	btf = btf_get_module_btf(st_ops->owner);
+	if (!btf)
+		return -EINVAL;
+
+	log = kzalloc(sizeof(*log), GFP_KERNEL | __GFP_NOWARN);
+	if (!log) {
+		err = -ENOMEM;
+		goto errout;
+	}
+
+	log->level = BPF_LOG_KERNEL;
+
+	err = btf_add_struct_ops(btf, st_ops, log);
+
+errout:
+	kfree(log);
+	btf_put(btf);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(__register_bpf_struct_ops);
diff --git a/net/bpf/bpf_dummy_struct_ops.c b/net/bpf/bpf_dummy_struct_ops.c
index ba2c58dba2da..02de71719aed 100644
--- a/net/bpf/bpf_dummy_struct_ops.c
+++ b/net/bpf/bpf_dummy_struct_ops.c
@@ -7,7 +7,7 @@
 #include <linux/bpf.h>
 #include <linux/btf.h>
 -extern struct bpf_struct_ops bpf_bpf_dummy_ops;
+static struct bpf_struct_ops bpf_bpf_dummy_ops;
  /* A common type for test_N with return value in bpf_dummy_ops */
 typedef int (*dummy_ops_test_ret_fn)(struct bpf_dummy_ops_state *state,
...);
@@ -256,7 +256,7 @@ static struct bpf_dummy_ops __bpf_bpf_dummy_ops = {
 	.test_sleepable = bpf_dummy_test_sleepable,
 };
 -struct bpf_struct_ops bpf_bpf_dummy_ops = {
+static struct bpf_struct_ops bpf_bpf_dummy_ops = {
 	.verifier_ops = &bpf_dummy_verifier_ops,
 	.init = bpf_dummy_init,
 	.check_member = bpf_dummy_ops_check_member,
@@ -265,4 +265,11 @@ struct bpf_struct_ops bpf_bpf_dummy_ops = {
 	.unreg = bpf_dummy_unreg,
 	.name = "bpf_dummy_ops",
 	.cfi_stubs = &__bpf_bpf_dummy_ops,
+	.owner = THIS_MODULE,
 };
+
+static int __init bpf_dummy_struct_ops_init(void)
+{
+	return register_bpf_struct_ops(&bpf_bpf_dummy_ops, bpf_dummy_ops);
+}
+late_initcall(bpf_dummy_struct_ops_init);
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c
index dffd8828079b..8e7716256d3c 100644
--- a/net/ipv4/bpf_tcp_ca.c
+++ b/net/ipv4/bpf_tcp_ca.c
@@ -12,7 +12,7 @@
 #include <net/bpf_sk_storage.h>
  /* "extern" is to avoid sparse warning.  It is only used in
bpf_struct_ops.c. */
-extern struct bpf_struct_ops bpf_tcp_congestion_ops;
+static struct bpf_struct_ops bpf_tcp_congestion_ops;
  static u32 unsupported_ops[] = {
 	offsetof(struct tcp_congestion_ops, get_info),
@@ -345,7 +345,7 @@ static struct tcp_congestion_ops
__bpf_ops_tcp_congestion_ops = {
 	.release = __bpf_tcp_ca_release,
 };
 -struct bpf_struct_ops bpf_tcp_congestion_ops = {
+static struct bpf_struct_ops bpf_tcp_congestion_ops = {
 	.verifier_ops = &bpf_tcp_ca_verifier_ops,
 	.reg = bpf_tcp_ca_reg,
 	.unreg = bpf_tcp_ca_unreg,
@@ -356,10 +356,16 @@ struct bpf_struct_ops bpf_tcp_congestion_ops = {
 	.validate = bpf_tcp_ca_validate,
 	.name = "tcp_congestion_ops",
 	.cfi_stubs = &__bpf_ops_tcp_congestion_ops,
+	.owner = THIS_MODULE,
 };
  static int __init bpf_tcp_ca_kfunc_init(void)
 {
-	return register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS,
&bpf_tcp_ca_kfunc_set);
+	int ret;
+
+	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS,
&bpf_tcp_ca_kfunc_set);
+	ret = ret ?: register_bpf_struct_ops(&bpf_tcp_congestion_ops,
tcp_congestion_ops);
+
+	return ret;
 }
 late_initcall(bpf_tcp_ca_kfunc_init);
-- 
2.34.1
Re: Fwd: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
Posted by Geliang Tang 2 months, 4 weeks ago 
On Tue, Jan 30, 2024 at 10:45:48AM +0100, Matthieu Baerts wrote:
> Hi Geliang,
> 
> This is just to let you know that I had to modify two commits you made
> to sync with upstream changes (see the patch below):
> 
> - a93c47792fc3: conflict in t/mptcp-add-bpf_mptcp_sched_ops
> - 8ac5b9528258: mptcp: bpf: adapt code to match upstream changes
> - ebd80ac09e97: conflict in t/bpf-Add-bpf_mptcp_sched_kfunc_set
> 
> Please see the new version of these two commits from our 'export' branch:
> 
> ff544a232510 ("bpf: Add bpf_mptcp_sched_ops")
> 66dfa335e74b ("bpf: Add bpf_mptcp_sched_kfunc_set")
> 
> Do you mind checking that everything is OK for you, please?

Thanks Matt,

All mptcp bpf tests passed in docker with my commit "[virtme-docker,v2]
tests: add bpftests support" on my side.

But got a new failure:

# Failed to load bpf_testmod.ko into the kernel: -22

It looks like register_bpf_struct_ops() in bpf_testmod_init() in
bpf_testmod/bpf_testmod.c failed. I'll try to fix it.

-Geliang

> 
> Cheers,
> Matt
> 
> 
> -------- Forwarded Message --------
> Subject: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
> Date: Fri, 19 Jan 2024 14:50:02 -0800
> From: thinker.li@gmail.com
> To: bpf@vger.kernel.org, ast@kernel.org, martin.lau@linux.dev,
> song@kernel.org, kernel-team@meta.com, andrii@kernel.org, drosen@google.com
> CC: sinquersw@gmail.com, kuifeng@meta.com, Kui-Feng Lee
> <thinker.li@gmail.com>, netdev@vger.kernel.org
> 
> From: Kui-Feng Lee <thinker.li@gmail.com>
> 
> Replace the static list of struct_ops types with per-btf struct_ops_tab to
> enable dynamic registration.
> 
> Both bpf_dummy_ops and bpf_tcp_ca now utilize the registration function
> instead of being listed in bpf_struct_ops_types.h.
> 
> Cc: netdev@vger.kernel.org
> Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
> ---
>  include/linux/bpf.h               |  33 +++++++---
>  include/linux/btf.h               |  12 ++++
>  kernel/bpf/bpf_struct_ops.c       | 100 ++++--------------------------
>  kernel/bpf/bpf_struct_ops_types.h |  12 ----
>  kernel/bpf/btf.c                  |  84 +++++++++++++++++++++++--
>  net/bpf/bpf_dummy_struct_ops.c    |  11 +++-
>  net/ipv4/bpf_tcp_ca.c             |  12 +++-
>  7 files changed, 146 insertions(+), 118 deletions(-)
>  delete mode 100644 kernel/bpf/bpf_struct_ops_types.h
> 
> diff --git a/include/linux/bpf.h b/include/linux/bpf.h
> index 90f78f04e139..085070ea3021 100644
> --- a/include/linux/bpf.h
> +++ b/include/linux/bpf.h
> @@ -1700,10 +1700,22 @@ struct bpf_struct_ops_common_value {
>  	enum bpf_struct_ops_state state;
>  };
>  +/* This macro helps developer to register a struct_ops type and generate
> + * type information correctly. Developers should use this macro to register
> + * a struct_ops type instead of calling __register_bpf_struct_ops()
> directly.
> + */
> +#define register_bpf_struct_ops(st_ops, type)				\
> +	({								\
> +		struct bpf_struct_ops_##type {				\
> +			struct bpf_struct_ops_common_value common;	\
> +			struct type data ____cacheline_aligned_in_smp;	\
> +		};							\
> +		BTF_TYPE_EMIT(struct bpf_struct_ops_##type);		\
> +		__register_bpf_struct_ops(st_ops);			\
> +	})
> +
>  #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
>  #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
> -const struct bpf_struct_ops_desc *bpf_struct_ops_find(struct btf *btf,
> u32 type_id);
> -void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
>  bool bpf_struct_ops_get(const void *kdata);
>  void bpf_struct_ops_put(const void *kdata);
>  int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
> @@ -1745,16 +1757,11 @@ struct bpf_dummy_ops {
>  int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr
> *kattr,
>  			    union bpf_attr __user *uattr);
>  #endif
> +int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
> +			     struct btf *btf,
> +			     struct bpf_verifier_log *log);
>  void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct
> bpf_map *map);
>  #else
> -static inline const struct bpf_struct_ops_desc
> *bpf_struct_ops_find(struct btf *btf, u32 type_id)
> -{
> -	return NULL;
> -}
> -static inline void bpf_struct_ops_init(struct btf *btf,
> -				       struct bpf_verifier_log *log)
> -{
> -}
>  static inline bool bpf_try_module_get(const void *data, struct module
> *owner)
>  {
>  	return try_module_get(owner);
> @@ -1792,6 +1799,12 @@ static inline int
> bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
>  static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
>  {
>  }
> +static inline int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc
> *st_ops_desc,
> +					   struct btf *btf,
> +					   struct bpf_verifier_log *log) {
> +	return -EOPNOTSUPP;
> +}
> +
>  #endif
>   struct bpf_array {
> diff --git a/include/linux/btf.h b/include/linux/btf.h
> index 1d852dad7473..714801a382fd 100644
> --- a/include/linux/btf.h
> +++ b/include/linux/btf.h
> @@ -496,6 +496,7 @@ static inline void *btf_id_set8_contains(const
> struct btf_id_set8 *set, u32 id)
>  }
>   struct bpf_verifier_log;
> +struct bpf_struct_ops;
>   #ifdef CONFIG_BPF_SYSCALL
>  const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);
> @@ -520,6 +521,9 @@ btf_get_prog_ctx_type(struct bpf_verifier_log *log,
> const struct btf *btf,
>  int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum
> bpf_prog_type prog_type);
>  bool btf_types_are_same(const struct btf *btf1, u32 id1,
>  			const struct btf *btf2, u32 id2);
> +int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops);
> +const struct bpf_struct_ops_desc *bpf_struct_ops_find_value(struct btf
> *btf, u32 value_id);
> +const struct bpf_struct_ops_desc *bpf_struct_ops_find(struct btf *btf,
> u32 type_id);
>  #else
>  static inline const struct btf_type *btf_type_by_id(const struct btf *btf,
>  						    u32 type_id)
> @@ -572,6 +576,14 @@ static inline bool btf_types_are_same(const struct
> btf *btf1, u32 id1,
>  {
>  	return false;
>  }
> +static inline int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops)
> +{
> +	return -ENOTSUPP;
> +}
> +static inline const struct bpf_struct_ops_desc
> *bpf_struct_ops_find(struct btf *btf, u32 type_id)
> +{
> +	return NULL;
> +}
>  #endif
>   static inline bool btf_type_is_struct_ptr(struct btf *btf, const
> struct btf_type *t)
> diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c
> index 30ab34fab0f8..defc052e4622 100644
> --- a/kernel/bpf/bpf_struct_ops.c
> +++ b/kernel/bpf/bpf_struct_ops.c
> @@ -62,35 +62,6 @@ static DEFINE_MUTEX(update_mutex);
>  #define VALUE_PREFIX "bpf_struct_ops_"
>  #define VALUE_PREFIX_LEN (sizeof(VALUE_PREFIX) - 1)
>  -/* bpf_struct_ops_##_name (e.g. bpf_struct_ops_tcp_congestion_ops) is
> - * the map's value exposed to the userspace and its btf-type-id is
> - * stored at the map->btf_vmlinux_value_type_id.
> - *
> - */
> -#define BPF_STRUCT_OPS_TYPE(_name)				\
> -extern struct bpf_struct_ops bpf_##_name;			\
> -								\
> -struct bpf_struct_ops_##_name {					\
> -	struct bpf_struct_ops_common_value common;		\
> -	struct _name data ____cacheline_aligned_in_smp;		\
> -};
> -#include "bpf_struct_ops_types.h"
> -#undef BPF_STRUCT_OPS_TYPE
> -
> -enum {
> -#define BPF_STRUCT_OPS_TYPE(_name) BPF_STRUCT_OPS_TYPE_##_name,
> -#include "bpf_struct_ops_types.h"
> -#undef BPF_STRUCT_OPS_TYPE
> -	__NR_BPF_STRUCT_OPS_TYPE,
> -};
> -
> -static struct bpf_struct_ops_desc bpf_struct_ops[] = {
> -#define BPF_STRUCT_OPS_TYPE(_name)				\
> -	[BPF_STRUCT_OPS_TYPE_##_name] = { .st_ops = &bpf_##_name },
> -#include "bpf_struct_ops_types.h"
> -#undef BPF_STRUCT_OPS_TYPE
> -};
> -
>  const struct bpf_verifier_ops bpf_struct_ops_verifier_ops = {
>  };
>  @@ -145,9 +116,9 @@ static bool is_valid_value_type(struct btf *btf,
> s32 value_id,
>  	return true;
>  }
>  -static void bpf_struct_ops_desc_init(struct bpf_struct_ops_desc
> *st_ops_desc,
> -				     struct btf *btf,
> -				     struct bpf_verifier_log *log)
> +int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
> +			     struct btf *btf,
> +			     struct bpf_verifier_log *log)
>  {
>  	struct bpf_struct_ops *st_ops = st_ops_desc->st_ops;
>  	const struct btf_member *member;
> @@ -161,7 +132,7 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  	    sizeof(value_name)) {
>  		pr_warn("struct_ops name %s is too long\n",
>  			st_ops->name);
> -		return;
> +		return -EINVAL;
>  	}
>  	sprintf(value_name, "%s%s", VALUE_PREFIX, st_ops->name);
>  @@ -170,13 +141,13 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  	if (type_id < 0) {
>  		pr_warn("Cannot find struct %s in %s\n",
>  			st_ops->name, btf_get_name(btf));
> -		return;
> +		return -EINVAL;
>  	}
>  	t = btf_type_by_id(btf, type_id);
>  	if (btf_type_vlen(t) > BPF_STRUCT_OPS_MAX_NR_MEMBERS) {
>  		pr_warn("Cannot support #%u members in struct %s\n",
>  			btf_type_vlen(t), st_ops->name);
> -		return;
> +		return -EINVAL;
>  	}
>   	value_id = btf_find_by_name_kind(btf, value_name,
> @@ -184,10 +155,10 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  	if (value_id < 0) {
>  		pr_warn("Cannot find struct %s in %s\n",
>  			value_name, btf_get_name(btf));
> -		return;
> +		return -EINVAL;
>  	}
>  	if (!is_valid_value_type(btf, value_id, t, value_name))
> -		return;
> +		return -EINVAL;
>   	for_each_member(i, t, member) {
>  		const struct btf_type *func_proto;
> @@ -196,13 +167,13 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  		if (!*mname) {
>  			pr_warn("anon member in struct %s is not supported\n",
>  				st_ops->name);
> -			break;
> +			return -EOPNOTSUPP;
>  		}
>   		if (__btf_member_bitfield_size(t, member)) {
>  			pr_warn("bit field member %s in struct %s is not supported\n",
>  				mname, st_ops->name);
> -			break;
> +			return -EOPNOTSUPP;
>  		}
>   		func_proto = btf_type_resolve_func_ptr(btf,
> @@ -214,7 +185,7 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  					   &st_ops->func_models[i])) {
>  			pr_warn("Error in parsing func ptr %s in struct %s\n",
>  				mname, st_ops->name);
> -			break;
> +			return -EINVAL;
>  		}
>  	}
>  @@ -222,6 +193,7 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  		if (st_ops->init(btf)) {
>  			pr_warn("Error in init bpf_struct_ops %s\n",
>  				st_ops->name);
> +			return -EINVAL;
>  		} else {
>  			st_ops_desc->type_id = type_id;
>  			st_ops_desc->type = t;
> @@ -230,54 +202,8 @@ static void bpf_struct_ops_desc_init(struct
> bpf_struct_ops_desc *st_ops_desc,
>  								 value_id);
>  		}
>  	}
> -}
>  -void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log)
> -{
> -	struct bpf_struct_ops_desc *st_ops_desc;
> -	u32 i;
> -
> -	/* Ensure BTF type is emitted for "struct bpf_struct_ops_##_name" */
> -#define BPF_STRUCT_OPS_TYPE(_name) BTF_TYPE_EMIT(struct
> bpf_struct_ops_##_name);
> -#include "bpf_struct_ops_types.h"
> -#undef BPF_STRUCT_OPS_TYPE
> -
> -	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
> -		st_ops_desc = &bpf_struct_ops[i];
> -		bpf_struct_ops_desc_init(st_ops_desc, btf, log);
> -	}
> -}
> -
> -static const struct bpf_struct_ops_desc *
> -bpf_struct_ops_find_value(struct btf *btf, u32 value_id)
> -{
> -	unsigned int i;
> -
> -	if (!value_id || !btf)
> -		return NULL;
> -
> -	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
> -		if (bpf_struct_ops[i].value_id == value_id)
> -			return &bpf_struct_ops[i];
> -	}
> -
> -	return NULL;
> -}
> -
> -const struct bpf_struct_ops_desc *
> -bpf_struct_ops_find(struct btf *btf, u32 type_id)
> -{
> -	unsigned int i;
> -
> -	if (!type_id || !btf)
> -		return NULL;
> -
> -	for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
> -		if (bpf_struct_ops[i].type_id == type_id)
> -			return &bpf_struct_ops[i];
> -	}
> -
> -	return NULL;
> +	return 0;
>  }
>   static int bpf_struct_ops_map_get_next_key(struct bpf_map *map, void *key,
> diff --git a/kernel/bpf/bpf_struct_ops_types.h
> b/kernel/bpf/bpf_struct_ops_types.h
> deleted file mode 100644
> index 5678a9ddf817..000000000000
> --- a/kernel/bpf/bpf_struct_ops_types.h
> +++ /dev/null
> @@ -1,12 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -/* internal file - do not include directly */
> -
> -#ifdef CONFIG_BPF_JIT
> -#ifdef CONFIG_NET
> -BPF_STRUCT_OPS_TYPE(bpf_dummy_ops)
> -#endif
> -#ifdef CONFIG_INET
> -#include <net/tcp.h>
> -BPF_STRUCT_OPS_TYPE(tcp_congestion_ops)
> -#endif
> -#endif
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index 3fa84c44b882..78eacd4aa362 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -19,6 +19,7 @@
>  #include <linux/bpf_verifier.h>
>  #include <linux/btf.h>
>  #include <linux/btf_ids.h>
> +#include <linux/bpf.h>
>  #include <linux/bpf_lsm.h>
>  #include <linux/skmsg.h>
>  #include <linux/perf_event.h>
> @@ -5792,8 +5793,6 @@ struct btf *btf_parse_vmlinux(void)
>  	/* btf_parse_vmlinux() runs under bpf_verifier_lock */
>  	bpf_ctx_convert.t = btf_type_by_id(btf, bpf_ctx_convert_btf_id[0]);
>  -	bpf_struct_ops_init(btf, log);
> -
>  	refcount_set(&btf->refcnt, 1);
>   	err = btf_alloc_id(btf);
> @@ -8489,10 +8488,11 @@ bool btf_type_ids_nocast_alias(struct
> bpf_verifier_log *log,
>  }
>   static int
> -btf_add_struct_ops(struct btf *btf, struct bpf_struct_ops *st_ops)
> +btf_add_struct_ops(struct btf *btf, struct bpf_struct_ops *st_ops,
> +		   struct bpf_verifier_log *log)
>  {
>  	struct btf_struct_ops_tab *tab, *new_tab;
> -	int i;
> +	int i, err;
>   	if (!btf)
>  		return -ENOENT;
> @@ -8529,7 +8529,83 @@ btf_add_struct_ops(struct btf *btf, struct
> bpf_struct_ops *st_ops)
>   	tab->ops[btf->struct_ops_tab->cnt].st_ops = st_ops;
>  +	err = bpf_struct_ops_desc_init(&tab->ops[btf->struct_ops_tab->cnt],
> btf, log);
> +	if (err)
> +		return err;
> +
>  	btf->struct_ops_tab->cnt++;
>   	return 0;
>  }
> +
> +const struct bpf_struct_ops_desc *
> +bpf_struct_ops_find_value(struct btf *btf, u32 value_id)
> +{
> +	const struct bpf_struct_ops_desc *st_ops_list;
> +	unsigned int i;
> +	u32 cnt;
> +
> +	if (!value_id)
> +		return NULL;
> +	if (!btf->struct_ops_tab)
> +		return NULL;
> +
> +	cnt = btf->struct_ops_tab->cnt;
> +	st_ops_list = btf->struct_ops_tab->ops;
> +	for (i = 0; i < cnt; i++) {
> +		if (st_ops_list[i].value_id == value_id)
> +			return &st_ops_list[i];
> +	}
> +
> +	return NULL;
> +}
> +
> +const struct bpf_struct_ops_desc *
> +bpf_struct_ops_find(struct btf *btf, u32 type_id)
> +{
> +	const struct bpf_struct_ops_desc *st_ops_list;
> +	unsigned int i;
> +	u32 cnt;
> +
> +	if (!type_id)
> +		return NULL;
> +	if (!btf->struct_ops_tab)
> +		return NULL;
> +
> +	cnt = btf->struct_ops_tab->cnt;
> +	st_ops_list = btf->struct_ops_tab->ops;
> +	for (i = 0; i < cnt; i++) {
> +		if (st_ops_list[i].type_id == type_id)
> +			return &st_ops_list[i];
> +	}
> +
> +	return NULL;
> +}
> +
> +int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops)
> +{
> +	struct bpf_verifier_log *log;
> +	struct btf *btf;
> +	int err = 0;
> +
> +	btf = btf_get_module_btf(st_ops->owner);
> +	if (!btf)
> +		return -EINVAL;
> +
> +	log = kzalloc(sizeof(*log), GFP_KERNEL | __GFP_NOWARN);
> +	if (!log) {
> +		err = -ENOMEM;
> +		goto errout;
> +	}
> +
> +	log->level = BPF_LOG_KERNEL;
> +
> +	err = btf_add_struct_ops(btf, st_ops, log);
> +
> +errout:
> +	kfree(log);
> +	btf_put(btf);
> +
> +	return err;
> +}
> +EXPORT_SYMBOL_GPL(__register_bpf_struct_ops);
> diff --git a/net/bpf/bpf_dummy_struct_ops.c b/net/bpf/bpf_dummy_struct_ops.c
> index ba2c58dba2da..02de71719aed 100644
> --- a/net/bpf/bpf_dummy_struct_ops.c
> +++ b/net/bpf/bpf_dummy_struct_ops.c
> @@ -7,7 +7,7 @@
>  #include <linux/bpf.h>
>  #include <linux/btf.h>
>  -extern struct bpf_struct_ops bpf_bpf_dummy_ops;
> +static struct bpf_struct_ops bpf_bpf_dummy_ops;
>   /* A common type for test_N with return value in bpf_dummy_ops */
>  typedef int (*dummy_ops_test_ret_fn)(struct bpf_dummy_ops_state *state,
> ...);
> @@ -256,7 +256,7 @@ static struct bpf_dummy_ops __bpf_bpf_dummy_ops = {
>  	.test_sleepable = bpf_dummy_test_sleepable,
>  };
>  -struct bpf_struct_ops bpf_bpf_dummy_ops = {
> +static struct bpf_struct_ops bpf_bpf_dummy_ops = {
>  	.verifier_ops = &bpf_dummy_verifier_ops,
>  	.init = bpf_dummy_init,
>  	.check_member = bpf_dummy_ops_check_member,
> @@ -265,4 +265,11 @@ struct bpf_struct_ops bpf_bpf_dummy_ops = {
>  	.unreg = bpf_dummy_unreg,
>  	.name = "bpf_dummy_ops",
>  	.cfi_stubs = &__bpf_bpf_dummy_ops,
> +	.owner = THIS_MODULE,
>  };
> +
> +static int __init bpf_dummy_struct_ops_init(void)
> +{
> +	return register_bpf_struct_ops(&bpf_bpf_dummy_ops, bpf_dummy_ops);
> +}
> +late_initcall(bpf_dummy_struct_ops_init);
> diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c
> index dffd8828079b..8e7716256d3c 100644
> --- a/net/ipv4/bpf_tcp_ca.c
> +++ b/net/ipv4/bpf_tcp_ca.c
> @@ -12,7 +12,7 @@
>  #include <net/bpf_sk_storage.h>
>   /* "extern" is to avoid sparse warning.  It is only used in
> bpf_struct_ops.c. */
> -extern struct bpf_struct_ops bpf_tcp_congestion_ops;
> +static struct bpf_struct_ops bpf_tcp_congestion_ops;
>   static u32 unsupported_ops[] = {
>  	offsetof(struct tcp_congestion_ops, get_info),
> @@ -345,7 +345,7 @@ static struct tcp_congestion_ops
> __bpf_ops_tcp_congestion_ops = {
>  	.release = __bpf_tcp_ca_release,
>  };
>  -struct bpf_struct_ops bpf_tcp_congestion_ops = {
> +static struct bpf_struct_ops bpf_tcp_congestion_ops = {
>  	.verifier_ops = &bpf_tcp_ca_verifier_ops,
>  	.reg = bpf_tcp_ca_reg,
>  	.unreg = bpf_tcp_ca_unreg,
> @@ -356,10 +356,16 @@ struct bpf_struct_ops bpf_tcp_congestion_ops = {
>  	.validate = bpf_tcp_ca_validate,
>  	.name = "tcp_congestion_ops",
>  	.cfi_stubs = &__bpf_ops_tcp_congestion_ops,
> +	.owner = THIS_MODULE,
>  };
>   static int __init bpf_tcp_ca_kfunc_init(void)
>  {
> -	return register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS,
> &bpf_tcp_ca_kfunc_set);
> +	int ret;
> +
> +	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS,
> &bpf_tcp_ca_kfunc_set);
> +	ret = ret ?: register_bpf_struct_ops(&bpf_tcp_congestion_ops,
> tcp_congestion_ops);
> +
> +	return ret;
>  }
>  late_initcall(bpf_tcp_ca_kfunc_init);
> -- 
> 2.34.1
>
Re: Fwd: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
Posted by Matthieu Baerts 2 months, 4 weeks ago 
Hi Geliang,

On 31/01/2024 10:08, Geliang Tang wrote:
> On Tue, Jan 30, 2024 at 10:45:48AM +0100, Matthieu Baerts wrote:
>> Hi Geliang,
>>
>> This is just to let you know that I had to modify two commits you made
>> to sync with upstream changes (see the patch below):
>>
>> - a93c47792fc3: conflict in t/mptcp-add-bpf_mptcp_sched_ops
>> - 8ac5b9528258: mptcp: bpf: adapt code to match upstream changes
>> - ebd80ac09e97: conflict in t/bpf-Add-bpf_mptcp_sched_kfunc_set
>>
>> Please see the new version of these two commits from our 'export' branch:
>>
>> ff544a232510 ("bpf: Add bpf_mptcp_sched_ops")
>> 66dfa335e74b ("bpf: Add bpf_mptcp_sched_kfunc_set")
>>
>> Do you mind checking that everything is OK for you, please?
> 
> Thanks Matt,
> 
> All mptcp bpf tests passed in docker with my commit "[virtme-docker,v2]
> tests: add bpftests support" on my side.

Great!

> But got a new failure:
> 
> # Failed to load bpf_testmod.ko into the kernel: -22
> 
> It looks like register_bpf_struct_ops() in bpf_testmod_init() in
> bpf_testmod/bpf_testmod.c failed. I'll try to fix it.

Thank you for looking at that!

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.
Re: Fwd: [PATCH bpf-next v17 11/14] bpf, net: switch to dynamic registration
Posted by Matthieu Baerts 3 months ago 
On 30/01/2024 10:45, Matthieu Baerts wrote:
> This is just to let you know that I had to modify two commits you made
> to sync with upstream changes (see the patch below):
> 
> - a93c47792fc3: conflict in t/mptcp-add-bpf_mptcp_sched_ops
> - 8ac5b9528258: mptcp: bpf: adapt code to match upstream changes
> - ebd80ac09e97: conflict in t/bpf-Add-bpf_mptcp_sched_kfunc_set

I also had to add:

- cbacf0fc076a: Reapply "Squash to "bpf: Add bpf_mptcp_sched_ops""

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.

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