Move devlink dev selftest callbacks and related code from leftover.c to
file dev.c. No functional change in this patch.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
---
 net/devlink/dev.c           | 182 +++++++++++++++++++++++++++++++++++
 net/devlink/devl_internal.h |   2 +
 net/devlink/leftover.c      | 183 ------------------------------------
 3 files changed, 184 insertions(+), 183 deletions(-)

diff --git a/net/devlink/dev.c b/net/devlink/dev.c
index dcf0935462e8..78d824eda5ec 100644
--- a/net/devlink/dev.c
+++ b/net/devlink/dev.c
@@ -1159,3 +1159,185 @@ int devlink_compat_flash_update(struct devlink *devlink, const char *file_name)
 
 	return ret;
 }
+
+static int
+devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink,
+			  u32 portid, u32 seq, int flags,
+			  struct netlink_ext_ack *extack)
+{
+	struct nlattr *selftests;
+	void *hdr;
+	int err;
+	int i;
+
+	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags,
+			  DEVLINK_CMD_SELFTESTS_GET);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	err = -EMSGSIZE;
+	if (devlink_nl_put_handle(msg, devlink))
+		goto err_cancel_msg;
+
+	selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
+	if (!selftests)
+		goto err_cancel_msg;
+
+	for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
+	     i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
+		if (devlink->ops->selftest_check(devlink, i, extack)) {
+			err = nla_put_flag(msg, i);
+			if (err)
+				goto err_cancel_msg;
+		}
+	}
+
+	nla_nest_end(msg, selftests);
+	genlmsg_end(msg, hdr);
+	return 0;
+
+err_cancel_msg:
+	genlmsg_cancel(msg, hdr);
+	return err;
+}
+
+int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb,
+				      struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct sk_buff *msg;
+	int err;
+
+	if (!devlink->ops->selftest_check)
+		return -EOPNOTSUPP;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	err = devlink_nl_selftests_fill(msg, devlink, info->snd_portid,
+					info->snd_seq, 0, info->extack);
+	if (err) {
+		nlmsg_free(msg);
+		return err;
+	}
+
+	return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_cmd_selftests_get_dump_one(struct sk_buff *msg,
+				      struct devlink *devlink,
+				      struct netlink_callback *cb)
+{
+	if (!devlink->ops->selftest_check)
+		return 0;
+
+	return devlink_nl_selftests_fill(msg, devlink,
+					 NETLINK_CB(cb->skb).portid,
+					 cb->nlh->nlmsg_seq, NLM_F_MULTI,
+					 cb->extack);
+}
+
+const struct devlink_cmd devl_cmd_selftests_get = {
+	.dump_one		= devlink_nl_cmd_selftests_get_dump_one,
+};
+
+static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
+				       enum devlink_selftest_status test_status)
+{
+	struct nlattr *result_attr;
+
+	result_attr = nla_nest_start(skb, DEVLINK_ATTR_SELFTEST_RESULT);
+	if (!result_attr)
+		return -EMSGSIZE;
+
+	if (nla_put_u32(skb, DEVLINK_ATTR_SELFTEST_RESULT_ID, id) ||
+	    nla_put_u8(skb, DEVLINK_ATTR_SELFTEST_RESULT_STATUS,
+		       test_status))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, result_attr);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, result_attr);
+	return -EMSGSIZE;
+}
+
+static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = {
+	[DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG },
+};
+
+int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1];
+	struct devlink *devlink = info->user_ptr[0];
+	struct nlattr *attrs, *selftests;
+	struct sk_buff *msg;
+	void *hdr;
+	int err;
+	int i;
+
+	if (!devlink->ops->selftest_run || !devlink->ops->selftest_check)
+		return -EOPNOTSUPP;
+
+	if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS))
+		return -EINVAL;
+
+	attrs = info->attrs[DEVLINK_ATTR_SELFTESTS];
+
+	err = nla_parse_nested(tb, DEVLINK_ATTR_SELFTEST_ID_MAX, attrs,
+			       devlink_selftest_nl_policy, info->extack);
+	if (err < 0)
+		return err;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	err = -EMSGSIZE;
+	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+			  &devlink_nl_family, 0, DEVLINK_CMD_SELFTESTS_RUN);
+	if (!hdr)
+		goto free_msg;
+
+	if (devlink_nl_put_handle(msg, devlink))
+		goto genlmsg_cancel;
+
+	selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
+	if (!selftests)
+		goto genlmsg_cancel;
+
+	for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
+	     i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
+		enum devlink_selftest_status test_status;
+
+		if (nla_get_flag(tb[i])) {
+			if (!devlink->ops->selftest_check(devlink, i,
+							  info->extack)) {
+				if (devlink_selftest_result_put(msg, i,
+								DEVLINK_SELFTEST_STATUS_SKIP))
+					goto selftests_nest_cancel;
+				continue;
+			}
+
+			test_status = devlink->ops->selftest_run(devlink, i,
+								 info->extack);
+			if (devlink_selftest_result_put(msg, i, test_status))
+				goto selftests_nest_cancel;
+		}
+	}
+
+	nla_nest_end(msg, selftests);
+	genlmsg_end(msg, hdr);
+	return genlmsg_reply(msg, info);
+
+selftests_nest_cancel:
+	nla_nest_cancel(msg, selftests);
+genlmsg_cancel:
+	genlmsg_cancel(msg, hdr);
+free_msg:
+	nlmsg_free(msg);
+	return err;
+}
diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index a5c29ad20564..941174e157d4 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -216,3 +216,5 @@ int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info)
 int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_info_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index ed3fb6133501..97d30ea98b00 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -143,10 +143,6 @@ static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_
 		NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
 };
 
-static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = {
-	[DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG },
-};
-
 #define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port)				\
 	WARN_ON_ONCE(!(devlink_port)->registered)
 #define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port)			\
@@ -3848,185 +3844,6 @@ int devlink_resources_validate(struct devlink *devlink,
 	return err;
 }
 
-static int
-devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink,
-			  u32 portid, u32 seq, int flags,
-			  struct netlink_ext_ack *extack)
-{
-	struct nlattr *selftests;
-	void *hdr;
-	int err;
-	int i;
-
-	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags,
-			  DEVLINK_CMD_SELFTESTS_GET);
-	if (!hdr)
-		return -EMSGSIZE;
-
-	err = -EMSGSIZE;
-	if (devlink_nl_put_handle(msg, devlink))
-		goto err_cancel_msg;
-
-	selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
-	if (!selftests)
-		goto err_cancel_msg;
-
-	for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
-	     i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
-		if (devlink->ops->selftest_check(devlink, i, extack)) {
-			err = nla_put_flag(msg, i);
-			if (err)
-				goto err_cancel_msg;
-		}
-	}
-
-	nla_nest_end(msg, selftests);
-	genlmsg_end(msg, hdr);
-	return 0;
-
-err_cancel_msg:
-	genlmsg_cancel(msg, hdr);
-	return err;
-}
-
-static int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb,
-					     struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct sk_buff *msg;
-	int err;
-
-	if (!devlink->ops->selftest_check)
-		return -EOPNOTSUPP;
-
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!msg)
-		return -ENOMEM;
-
-	err = devlink_nl_selftests_fill(msg, devlink, info->snd_portid,
-					info->snd_seq, 0, info->extack);
-	if (err) {
-		nlmsg_free(msg);
-		return err;
-	}
-
-	return genlmsg_reply(msg, info);
-}
-
-static int
-devlink_nl_cmd_selftests_get_dump_one(struct sk_buff *msg,
-				      struct devlink *devlink,
-				      struct netlink_callback *cb)
-{
-	if (!devlink->ops->selftest_check)
-		return 0;
-
-	return devlink_nl_selftests_fill(msg, devlink,
-					 NETLINK_CB(cb->skb).portid,
-					 cb->nlh->nlmsg_seq, NLM_F_MULTI,
-					 cb->extack);
-}
-
-const struct devlink_cmd devl_cmd_selftests_get = {
-	.dump_one		= devlink_nl_cmd_selftests_get_dump_one,
-};
-
-static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
-				       enum devlink_selftest_status test_status)
-{
-	struct nlattr *result_attr;
-
-	result_attr = nla_nest_start(skb, DEVLINK_ATTR_SELFTEST_RESULT);
-	if (!result_attr)
-		return -EMSGSIZE;
-
-	if (nla_put_u32(skb, DEVLINK_ATTR_SELFTEST_RESULT_ID, id) ||
-	    nla_put_u8(skb, DEVLINK_ATTR_SELFTEST_RESULT_STATUS,
-		       test_status))
-		goto nla_put_failure;
-
-	nla_nest_end(skb, result_attr);
-	return 0;
-
-nla_put_failure:
-	nla_nest_cancel(skb, result_attr);
-	return -EMSGSIZE;
-}
-
-static int devlink_nl_cmd_selftests_run(struct sk_buff *skb,
-					struct genl_info *info)
-{
-	struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1];
-	struct devlink *devlink = info->user_ptr[0];
-	struct nlattr *attrs, *selftests;
-	struct sk_buff *msg;
-	void *hdr;
-	int err;
-	int i;
-
-	if (!devlink->ops->selftest_run || !devlink->ops->selftest_check)
-		return -EOPNOTSUPP;
-
-	if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS))
-		return -EINVAL;
-
-	attrs = info->attrs[DEVLINK_ATTR_SELFTESTS];
-
-	err = nla_parse_nested(tb, DEVLINK_ATTR_SELFTEST_ID_MAX, attrs,
-			       devlink_selftest_nl_policy, info->extack);
-	if (err < 0)
-		return err;
-
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!msg)
-		return -ENOMEM;
-
-	err = -EMSGSIZE;
-	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
-			  &devlink_nl_family, 0, DEVLINK_CMD_SELFTESTS_RUN);
-	if (!hdr)
-		goto free_msg;
-
-	if (devlink_nl_put_handle(msg, devlink))
-		goto genlmsg_cancel;
-
-	selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
-	if (!selftests)
-		goto genlmsg_cancel;
-
-	for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
-	     i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
-		enum devlink_selftest_status test_status;
-
-		if (nla_get_flag(tb[i])) {
-			if (!devlink->ops->selftest_check(devlink, i,
-							  info->extack)) {
-				if (devlink_selftest_result_put(msg, i,
-								DEVLINK_SELFTEST_STATUS_SKIP))
-					goto selftests_nest_cancel;
-				continue;
-			}
-
-			test_status = devlink->ops->selftest_run(devlink, i,
-								 info->extack);
-			if (devlink_selftest_result_put(msg, i, test_status))
-				goto selftests_nest_cancel;
-		}
-	}
-
-	nla_nest_end(msg, selftests);
-	genlmsg_end(msg, hdr);
-	return genlmsg_reply(msg, info);
-
-selftests_nest_cancel:
-	nla_nest_cancel(msg, selftests);
-genlmsg_cancel:
-	genlmsg_cancel(msg, hdr);
-free_msg:
-	nlmsg_free(msg);
-	return err;
-}
-
 static const struct devlink_param devlink_param_generic[] = {
 	{
 		.id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
-- 
2.27.0

On Thu, 2 Feb 2023 16:47:06 +0200 Moshe Shemesh wrote:
> Move devlink dev selftest callbacks and related code from leftover.c to
> file dev.c. No functional change in this patch.

selftest I'd put in its own file. We don't want every command which
doesn't have a specific sub-object to end up in dev.c, right?
At least that was my initial thinking. I don't see any dependencies
between the selftest code and the rest of the dev code either.
WDYT?

On 02/02/2023 20:17, Jakub Kicinski wrote:
> External email: Use caution opening links or attachments
>
>
> On Thu, 2 Feb 2023 16:47:06 +0200 Moshe Shemesh wrote:
>> Move devlink dev selftest callbacks and related code from leftover.c to
>> file dev.c. No functional change in this patch.
> selftest I'd put in its own file. We don't want every command which
> doesn't have a specific sub-object to end up in dev.c, right?
> At least that was my initial thinking. I don't see any dependencies
> between the selftest code and the rest of the dev code either.
> WDYT?


I thought as it is devlink dev selftest, the sub-object is dev. 
Otherwise, what should be the rule here ?

How do we decide if it should get its own file ?

On Thu, 2 Feb 2023 21:33:52 +0200 Moshe Shemesh wrote:
> On 02/02/2023 20:17, Jakub Kicinski wrote:
> > On Thu, 2 Feb 2023 16:47:06 +0200 Moshe Shemesh wrote:  
> >> Move devlink dev selftest callbacks and related code from leftover.c to
> >> file dev.c. No functional change in this patch.  
> > selftest I'd put in its own file. We don't want every command which
> > doesn't have a specific sub-object to end up in dev.c, right?
> > At least that was my initial thinking. I don't see any dependencies
> > between the selftest code and the rest of the dev code either.
> > WDYT?  
> 
> I thought as it is devlink dev selftest, the sub-object is dev. 
> Otherwise, what should be the rule here ?
> 
> How do we decide if it should get its own file ?

My thinking was that it should be much easier for newcomers to grok
"what does it take to implement a devlink command" if most of the
subcommands where in their own files, like in ethtool.

The implementation could have as well made selftest a subobject.
But I don't feel strongly, if noone agrees we can apply as is and 
see if dev.c does indeed start to grow out of proportion.

Thu, Feb 02, 2023 at 08:46:21PM CET, kuba@kernel.org wrote:
>On Thu, 2 Feb 2023 21:33:52 +0200 Moshe Shemesh wrote:
>> On 02/02/2023 20:17, Jakub Kicinski wrote:
>> > On Thu, 2 Feb 2023 16:47:06 +0200 Moshe Shemesh wrote:  
>> >> Move devlink dev selftest callbacks and related code from leftover.c to
>> >> file dev.c. No functional change in this patch.  
>> > selftest I'd put in its own file. We don't want every command which
>> > doesn't have a specific sub-object to end up in dev.c, right?
>> > At least that was my initial thinking. I don't see any dependencies
>> > between the selftest code and the rest of the dev code either.
>> > WDYT?  
>> 
>> I thought as it is devlink dev selftest, the sub-object is dev. 
>> Otherwise, what should be the rule here ?
>> 
>> How do we decide if it should get its own file ?
>
>My thinking was that it should be much easier for newcomers to grok
>"what does it take to implement a devlink command" if most of the
>subcommands where in their own files, like in ethtool.
>
>The implementation could have as well made selftest a subobject.
>But I don't feel strongly, if noone agrees we can apply as is and 
>see if dev.c does indeed start to grow out of proportion.

I think that per-object separation is good for now. I see no point of
having per-cmd files of sometimes 50 lines. IDK. No strong opinion.
I would start with per-object.