[PATCH net-next v2 0/7] ethtool: allow dumping policies to user space

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* [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
@ 2020-10-05 22:07 Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 1/7] ethtool: wire up get policies to ops Jakub Kicinski
                   ` (7 more replies)
  0 siblings, 8 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

Hi!

This series wires up ethtool policies to ops, so they can be
dumped to user space for feature discovery.

First patch wires up GET commands, and second patch wires up SETs.

The policy tables are trimmed to save space and LoC.

Next - take care of linking up nested policies for the header
(which is the policy what we actually care about). And once header
policy is linked make sure that attribute range validation for flags
is done by policy, not a conditions in the code. New type of policy
is needed to validate masks (patch 6).

Netlink as always staying a step ahead of all the other kernel
API interfaces :)

v2:
 - merge patches 1 & 2 -> 1
 - add patch 3 & 5
 - remove .max_attr from struct ethnl_request_ops

Jakub Kicinski (7):
  ethtool: wire up get policies to ops
  ethtool: wire up set policies to ops
  ethtool: trim policy tables
  ethtool: link up ethnl_header_policy as a nested policy
  netlink: create helpers for checking type is an int
  netlink: add mask validation
  ethtool: specify which header flags are supported per command

 include/net/netlink.h        |  27 +++++---
 include/uapi/linux/netlink.h |   2 +
 lib/nlattr.c                 |  36 ++++++++++
 net/ethtool/bitset.c         |  26 ++++----
 net/ethtool/cabletest.c      |  41 ++++--------
 net/ethtool/channels.c       |  35 ++--------
 net/ethtool/coalesce.c       |  45 ++-----------
 net/ethtool/debug.c          |  24 ++-----
 net/ethtool/eee.c            |  32 +++------
 net/ethtool/features.c       |  30 ++-------
 net/ethtool/linkinfo.c       |  30 ++-------
 net/ethtool/linkmodes.c      |  32 ++-------
 net/ethtool/linkstate.c      |  14 +---
 net/ethtool/netlink.c        | 124 +++++++++++++++++++++++++----------
 net/ethtool/netlink.h        |  35 ++++++++--
 net/ethtool/pause.c          |  27 ++------
 net/ethtool/privflags.c      |  24 ++-----
 net/ethtool/rings.c          |  35 ++--------
 net/ethtool/strset.c         |  25 +++----
 net/ethtool/tsinfo.c         |  13 +---
 net/ethtool/tunnels.c        |  42 ++++--------
 net/ethtool/wol.c            |  24 ++-----
 net/netlink/policy.c         |   8 +++
 23 files changed, 317 insertions(+), 414 deletions(-)

-- 
2.26.2


^ permalink raw reply	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 1/7] ethtool: wire up get policies to ops
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 2/7] ethtool: wire up set " Jakub Kicinski
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

Wire up policies for get commands in struct nla_policy of the ethtool
family. Make use of genetlink code attr validation and parsing, as well
as allow dumping policies to user space.

For every ETHTOOL_MSG_*_GET:
 - add 'ethnl_' prefix to policy name
 - add extern declaration in net/ethtool/netlink.h
 - wire up the policy & attr in ethtool_genl_ops[].
 - remove .request_policy and .max_attr from ethnl_request_ops.

Obviously core only records the first "layer" of parsed attrs
so we still need to parse the sub-attrs of the nested header
attribute.

v2:
 - merge of patches 1 and 2 from v1
 - remove stray empty lines in ops
 - also remove .max_attr

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/channels.c  |  6 ++--
 net/ethtool/coalesce.c  |  6 ++--
 net/ethtool/debug.c     |  5 +---
 net/ethtool/eee.c       |  5 +---
 net/ethtool/features.c  |  6 ++--
 net/ethtool/linkinfo.c  |  6 ++--
 net/ethtool/linkmodes.c |  6 ++--
 net/ethtool/linkstate.c |  6 ++--
 net/ethtool/netlink.c   | 62 ++++++++++++++++++++++++++---------------
 net/ethtool/netlink.h   | 20 ++++++++++---
 net/ethtool/pause.c     |  5 +---
 net/ethtool/privflags.c |  6 ++--
 net/ethtool/rings.c     |  5 +---
 net/ethtool/strset.c    |  4 +--
 net/ethtool/tsinfo.c    |  5 +---
 net/ethtool/tunnels.c   | 39 +++++++++-----------------
 net/ethtool/wol.c       |  5 +---
 17 files changed, 90 insertions(+), 107 deletions(-)

diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 9ecda09ecb11..6ffcea099fd3 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -17,8 +17,8 @@ struct channels_reply_data {
 #define CHANNELS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct channels_reply_data, base)
 
-static const struct nla_policy
-channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
+const struct nla_policy
+ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
 	[ETHTOOL_A_CHANNELS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_CHANNELS_RX_MAX]		= { .type = NLA_REJECT },
@@ -99,10 +99,8 @@ const struct ethnl_request_ops ethnl_channels_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_CHANNELS_GET,
 	.reply_cmd		= ETHTOOL_MSG_CHANNELS_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_CHANNELS_HEADER,
-	.max_attr		= ETHTOOL_A_CHANNELS_MAX,
 	.req_info_size		= sizeof(struct channels_req_info),
 	.reply_data_size	= sizeof(struct channels_reply_data),
-	.request_policy		= channels_get_policy,
 
 	.prepare_data		= channels_prepare_data,
 	.reply_size		= channels_reply_size,
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index 6afd99042d67..58a2eb375135 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -51,8 +51,8 @@ __CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
 __CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
 __CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
 
-static const struct nla_policy
-coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
+const struct nla_policy
+ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
 	[ETHTOOL_A_COALESCE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_COALESCE_RX_USECS]		= { .type = NLA_REJECT },
@@ -203,10 +203,8 @@ const struct ethnl_request_ops ethnl_coalesce_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_COALESCE_GET,
 	.reply_cmd		= ETHTOOL_MSG_COALESCE_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_COALESCE_HEADER,
-	.max_attr		= ETHTOOL_A_COALESCE_MAX,
 	.req_info_size		= sizeof(struct coalesce_req_info),
 	.reply_data_size	= sizeof(struct coalesce_reply_data),
-	.request_policy		= coalesce_get_policy,
 
 	.prepare_data		= coalesce_prepare_data,
 	.reply_size		= coalesce_reply_size,
diff --git a/net/ethtool/debug.c b/net/ethtool/debug.c
index 1bd026a29f3f..67623ae94d41 100644
--- a/net/ethtool/debug.c
+++ b/net/ethtool/debug.c
@@ -16,8 +16,7 @@ struct debug_reply_data {
 #define DEBUG_REPDATA(__reply_base) \
 	container_of(__reply_base, struct debug_reply_data, base)
 
-static const struct nla_policy
-debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
+const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
 	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_REJECT },
@@ -69,10 +68,8 @@ const struct ethnl_request_ops ethnl_debug_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_DEBUG_GET,
 	.reply_cmd		= ETHTOOL_MSG_DEBUG_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_DEBUG_HEADER,
-	.max_attr		= ETHTOOL_A_DEBUG_MAX,
 	.req_info_size		= sizeof(struct debug_req_info),
 	.reply_data_size	= sizeof(struct debug_reply_data),
-	.request_policy		= debug_get_policy,
 
 	.prepare_data		= debug_prepare_data,
 	.reply_size		= debug_reply_size,
diff --git a/net/ethtool/eee.c b/net/ethtool/eee.c
index 94aa19cff22f..860e482533ba 100644
--- a/net/ethtool/eee.c
+++ b/net/ethtool/eee.c
@@ -19,8 +19,7 @@ struct eee_reply_data {
 #define EEE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct eee_reply_data, base)
 
-static const struct nla_policy
-eee_get_policy[ETHTOOL_A_EEE_MAX + 1] = {
+const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1] = {
 	[ETHTOOL_A_EEE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_EEE_MODES_OURS]	= { .type = NLA_REJECT },
@@ -119,10 +118,8 @@ const struct ethnl_request_ops ethnl_eee_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_EEE_GET,
 	.reply_cmd		= ETHTOOL_MSG_EEE_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_EEE_HEADER,
-	.max_attr		= ETHTOOL_A_EEE_MAX,
 	.req_info_size		= sizeof(struct eee_req_info),
 	.reply_data_size	= sizeof(struct eee_reply_data),
-	.request_policy		= eee_get_policy,
 
 	.prepare_data		= eee_prepare_data,
 	.reply_size		= eee_reply_size,
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 495635f152ba..bc1b1c74b1f5 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -20,8 +20,8 @@ struct features_reply_data {
 #define FEATURES_REPDATA(__reply_base) \
 	container_of(__reply_base, struct features_reply_data, base)
 
-static const struct nla_policy
-features_get_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
+const struct nla_policy
+ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
 	[ETHTOOL_A_FEATURES_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_FEATURES_HW]		= { .type = NLA_REJECT },
@@ -120,10 +120,8 @@ const struct ethnl_request_ops ethnl_features_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_FEATURES_GET,
 	.reply_cmd		= ETHTOOL_MSG_FEATURES_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_FEATURES_HEADER,
-	.max_attr		= ETHTOOL_A_FEATURES_MAX,
 	.req_info_size		= sizeof(struct features_req_info),
 	.reply_data_size	= sizeof(struct features_reply_data),
-	.request_policy		= features_get_policy,
 
 	.prepare_data		= features_prepare_data,
 	.reply_size		= features_reply_size,
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index 5eaf173eaaca..eea75524e983 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -16,8 +16,8 @@ struct linkinfo_reply_data {
 #define LINKINFO_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkinfo_reply_data, base)
 
-static const struct nla_policy
-linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
+const struct nla_policy
+ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
 	[ETHTOOL_A_LINKINFO_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKINFO_PORT]		= { .type = NLA_REJECT },
@@ -83,10 +83,8 @@ const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_LINKINFO_GET,
 	.reply_cmd		= ETHTOOL_MSG_LINKINFO_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_LINKINFO_HEADER,
-	.max_attr		= ETHTOOL_A_LINKINFO_MAX,
 	.req_info_size		= sizeof(struct linkinfo_req_info),
 	.reply_data_size	= sizeof(struct linkinfo_reply_data),
-	.request_policy		= linkinfo_get_policy,
 
 	.prepare_data		= linkinfo_prepare_data,
 	.reply_size		= linkinfo_reply_size,
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index 29dcd675b65a..8e0b4a12f875 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -18,8 +18,8 @@ struct linkmodes_reply_data {
 #define LINKMODES_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkmodes_reply_data, base)
 
-static const struct nla_policy
-linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
+const struct nla_policy
+ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
 	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_REJECT },
@@ -148,10 +148,8 @@ const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_LINKMODES_GET,
 	.reply_cmd		= ETHTOOL_MSG_LINKMODES_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_LINKMODES_HEADER,
-	.max_attr		= ETHTOOL_A_LINKMODES_MAX,
 	.req_info_size		= sizeof(struct linkmodes_req_info),
 	.reply_data_size	= sizeof(struct linkmodes_reply_data),
-	.request_policy		= linkmodes_get_policy,
 
 	.prepare_data		= linkmodes_prepare_data,
 	.reply_size		= linkmodes_reply_size,
diff --git a/net/ethtool/linkstate.c b/net/ethtool/linkstate.c
index 4834091ec24c..ebd6dcff1dad 100644
--- a/net/ethtool/linkstate.c
+++ b/net/ethtool/linkstate.c
@@ -20,8 +20,8 @@ struct linkstate_reply_data {
 #define LINKSTATE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkstate_reply_data, base)
 
-static const struct nla_policy
-linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1] = {
+const struct nla_policy
+ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1] = {
 	[ETHTOOL_A_LINKSTATE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKSTATE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKSTATE_LINK]		= { .type = NLA_REJECT },
@@ -179,10 +179,8 @@ const struct ethnl_request_ops ethnl_linkstate_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_LINKSTATE_GET,
 	.reply_cmd		= ETHTOOL_MSG_LINKSTATE_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_LINKSTATE_HEADER,
-	.max_attr		= ETHTOOL_A_LINKSTATE_MAX,
 	.req_info_size		= sizeof(struct linkstate_req_info),
 	.reply_data_size	= sizeof(struct linkstate_reply_data),
-	.request_policy		= linkstate_get_policy,
 
 	.prepare_data		= linkstate_prepare_data,
 	.reply_size		= linkstate_reply_size,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 5c2072765be7..98031bdd8e8e 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -247,7 +247,7 @@ static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
 /**
  * ethnl_default_parse() - Parse request message
  * @req_info:    pointer to structure to put data into
- * @nlhdr:       pointer to request message header
+ * @tb:		 parsed attributes
  * @net:         request netns
  * @request_ops: struct request_ops for request type
  * @extack:      netlink extack for error reporting
@@ -259,37 +259,24 @@ static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
  * Return: 0 on success or negative error code
  */
 static int ethnl_default_parse(struct ethnl_req_info *req_info,
-			       const struct nlmsghdr *nlhdr, struct net *net,
+			       struct nlattr **tb, struct net *net,
 			       const struct ethnl_request_ops *request_ops,
 			       struct netlink_ext_ack *extack, bool require_dev)
 {
-	struct nlattr **tb;
 	int ret;
 
-	tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]),
-			   GFP_KERNEL);
-	if (!tb)
-		return -ENOMEM;
-
-	ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr,
-			  request_ops->request_policy, extack);
-	if (ret < 0)
-		goto out;
 	ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 					 net, extack, require_dev);
 	if (ret < 0)
-		goto out;
+		return ret;
 
 	if (request_ops->parse_request) {
 		ret = request_ops->parse_request(req_info, tb, extack);
 		if (ret < 0)
-			goto out;
+			return ret;
 	}
 
-	ret = 0;
-out:
-	kfree(tb);
-	return ret;
+	return 0;
 }
 
 /**
@@ -334,8 +321,8 @@ static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
 		return -ENOMEM;
 	}
 
-	ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops,
-				  info->extack, !ops->allow_nodev_do);
+	ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info),
+				  ops, info->extack, !ops->allow_nodev_do);
 	if (ret < 0)
 		goto err_dev;
 	ethnl_init_reply_data(reply_data, ops, req_info->dev);
@@ -480,6 +467,7 @@ static int ethnl_default_dumpit(struct sk_buff *skb,
 /* generic ->start() handler for GET requests */
 static int ethnl_default_start(struct netlink_callback *cb)
 {
+	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 	struct ethnl_reply_data *reply_data;
 	const struct ethnl_request_ops *ops;
@@ -502,8 +490,8 @@ static int ethnl_default_start(struct netlink_callback *cb)
 		goto free_req_info;
 	}
 
-	ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops,
-				  cb->extack, false);
+	ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk),
+				  ops, cb->extack, false);
 	if (req_info->dev) {
 		/* We ignore device specification in dump requests but as the
 		 * same parser as for non-dump (doit) requests is used, it
@@ -696,6 +684,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_strset_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_LINKINFO_GET,
@@ -703,6 +693,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_linkinfo_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
@@ -715,6 +707,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_linkmodes_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
@@ -727,6 +721,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_linkstate_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_DEBUG_GET,
@@ -734,6 +730,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_debug_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_DEBUG_SET,
@@ -747,6 +745,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_wol_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_WOL_SET,
@@ -759,6 +759,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_features_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_FEATURES_SET,
@@ -771,6 +773,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_privflags_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
@@ -783,6 +787,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_rings_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_RINGS_SET,
@@ -795,6 +801,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_channels_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
@@ -807,6 +815,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_coalesce_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_COALESCE_SET,
@@ -819,6 +829,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_pause_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_PAUSE_SET,
@@ -831,6 +843,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_eee_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_EEE_SET,
@@ -843,6 +857,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.start	= ethnl_default_start,
 		.dumpit	= ethnl_default_dumpit,
 		.done	= ethnl_default_done,
+		.policy = ethnl_tsinfo_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
@@ -859,6 +875,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.doit	= ethnl_tunnel_info_doit,
 		.start	= ethnl_tunnel_info_start,
 		.dumpit	= ethnl_tunnel_info_dumpit,
+		.policy = ethnl_tunnel_info_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
 	},
 };
 
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index e2085005caac..d150f5f5e92b 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -266,10 +266,8 @@ static inline void ethnl_ops_complete(struct net_device *dev)
  * @request_cmd:      command id for request (GET)
  * @reply_cmd:        command id for reply (GET_REPLY)
  * @hdr_attr:         attribute type for request header
- * @max_attr:         maximum (top level) attribute type
  * @req_info_size:    size of request info
  * @reply_data_size:  size of reply data
- * @request_policy:   netlink policy for message contents
  * @allow_nodev_do:   allow non-dump request with no device identification
  * @parse_request:
  *	Parse request except common header (struct ethnl_req_info). Common
@@ -312,10 +310,8 @@ struct ethnl_request_ops {
 	u8			request_cmd;
 	u8			reply_cmd;
 	u16			hdr_attr;
-	unsigned int		max_attr;
 	unsigned int		req_info_size;
 	unsigned int		reply_data_size;
-	const struct nla_policy *request_policy;
 	bool			allow_nodev_do;
 
 	int (*parse_request)(struct ethnl_req_info *req_info,
@@ -349,6 +345,22 @@ extern const struct ethnl_request_ops ethnl_pause_request_ops;
 extern const struct ethnl_request_ops ethnl_eee_request_ops;
 extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
+extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1];
+extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1];
+extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1];
+extern const struct nla_policy ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1];
+extern const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1];
+extern const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1];
+extern const struct nla_policy ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1];
+extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
+extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1];
+extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1];
+extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1];
+extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1];
+extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1];
+extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];
+extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
+
 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
 int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
 int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index 1980aa7eb2b6..f753094fc52a 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -16,8 +16,7 @@ struct pause_reply_data {
 #define PAUSE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct pause_reply_data, base)
 
-static const struct nla_policy
-pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
+const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
 	[ETHTOOL_A_PAUSE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_REJECT },
@@ -130,10 +129,8 @@ const struct ethnl_request_ops ethnl_pause_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_PAUSE_GET,
 	.reply_cmd		= ETHTOOL_MSG_PAUSE_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_PAUSE_HEADER,
-	.max_attr		= ETHTOOL_A_PAUSE_MAX,
 	.req_info_size		= sizeof(struct pause_req_info),
 	.reply_data_size	= sizeof(struct pause_reply_data),
-	.request_policy		= pause_get_policy,
 
 	.prepare_data		= pause_prepare_data,
 	.reply_size		= pause_reply_size,
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index 77447dceb109..9dfdd9b3a19c 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -18,8 +18,8 @@ struct privflags_reply_data {
 #define PRIVFLAGS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct privflags_reply_data, base)
 
-static const struct nla_policy
-privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
+const struct nla_policy
+ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
 	[ETHTOOL_A_PRIVFLAGS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PRIVFLAGS_FLAGS]		= { .type = NLA_REJECT },
@@ -124,10 +124,8 @@ const struct ethnl_request_ops ethnl_privflags_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_PRIVFLAGS_GET,
 	.reply_cmd		= ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_PRIVFLAGS_HEADER,
-	.max_attr		= ETHTOOL_A_PRIVFLAGS_MAX,
 	.req_info_size		= sizeof(struct privflags_req_info),
 	.reply_data_size	= sizeof(struct privflags_reply_data),
-	.request_policy		= privflags_get_policy,
 
 	.prepare_data		= privflags_prepare_data,
 	.reply_size		= privflags_reply_size,
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 5422526f4eef..006b70f54dd7 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -15,8 +15,7 @@ struct rings_reply_data {
 #define RINGS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct rings_reply_data, base)
 
-static const struct nla_policy
-rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
+const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
 	[ETHTOOL_A_RINGS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_RINGS_RX_MAX]		= { .type = NLA_REJECT },
@@ -97,10 +96,8 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_RINGS_GET,
 	.reply_cmd		= ETHTOOL_MSG_RINGS_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_RINGS_HEADER,
-	.max_attr		= ETHTOOL_A_RINGS_MAX,
 	.req_info_size		= sizeof(struct rings_req_info),
 	.reply_data_size	= sizeof(struct rings_reply_data),
-	.request_policy		= rings_get_policy,
 
 	.prepare_data		= rings_prepare_data,
 	.reply_size		= rings_reply_size,
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 82707b662fe4..9adff4668004 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -99,7 +99,7 @@ struct strset_reply_data {
 #define STRSET_REPDATA(__reply_base) \
 	container_of(__reply_base, struct strset_reply_data, base)
 
-static const struct nla_policy strset_get_policy[ETHTOOL_A_STRSET_MAX + 1] = {
+const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1] = {
 	[ETHTOOL_A_STRSET_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_STRSET_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
@@ -445,10 +445,8 @@ const struct ethnl_request_ops ethnl_strset_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_STRSET_GET,
 	.reply_cmd		= ETHTOOL_MSG_STRSET_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_STRSET_HEADER,
-	.max_attr		= ETHTOOL_A_STRSET_MAX,
 	.req_info_size		= sizeof(struct strset_req_info),
 	.reply_data_size	= sizeof(struct strset_reply_data),
-	.request_policy		= strset_get_policy,
 	.allow_nodev_do		= true,
 
 	.parse_request		= strset_parse_request,
diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c
index 7cb5b512b77c..21f0dc08cead 100644
--- a/net/ethtool/tsinfo.c
+++ b/net/ethtool/tsinfo.c
@@ -18,8 +18,7 @@ struct tsinfo_reply_data {
 #define TSINFO_REPDATA(__reply_base) \
 	container_of(__reply_base, struct tsinfo_reply_data, base)
 
-static const struct nla_policy
-tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
+const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
 	[ETHTOOL_A_TSINFO_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_TSINFO_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_TSINFO_TIMESTAMPING]		= { .type = NLA_REJECT },
@@ -132,10 +131,8 @@ const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_TSINFO_GET,
 	.reply_cmd		= ETHTOOL_MSG_TSINFO_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_TSINFO_HEADER,
-	.max_attr		= ETHTOOL_A_TSINFO_MAX,
 	.req_info_size		= sizeof(struct tsinfo_req_info),
 	.reply_data_size	= sizeof(struct tsinfo_reply_data),
-	.request_policy		= tsinfo_get_policy,
 
 	.prepare_data		= tsinfo_prepare_data,
 	.reply_size		= tsinfo_reply_size,
diff --git a/net/ethtool/tunnels.c b/net/ethtool/tunnels.c
index d93bf2da0f34..330817adcf62 100644
--- a/net/ethtool/tunnels.c
+++ b/net/ethtool/tunnels.c
@@ -8,8 +8,8 @@
 #include "common.h"
 #include "netlink.h"
 
-static const struct nla_policy
-ethtool_tunnel_info_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1] = {
+const struct nla_policy
+ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1] = {
 	[ETHTOOL_A_TUNNEL_INFO_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_TUNNEL_INFO_HEADER]		= { .type = NLA_NESTED },
 };
@@ -161,35 +161,19 @@ ethnl_tunnel_info_fill_reply(const struct ethnl_req_info *req_base,
 	return -EMSGSIZE;
 }
 
-static int
-ethnl_tunnel_info_req_parse(struct ethnl_req_info *req_info,
-			    const struct nlmsghdr *nlhdr, struct net *net,
-			    struct netlink_ext_ack *extack, bool require_dev)
-{
-	struct nlattr *tb[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
-	int ret;
-
-	ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_TUNNEL_INFO_MAX,
-			  ethtool_tunnel_info_policy, extack);
-	if (ret < 0)
-		return ret;
-
-	return ethnl_parse_header_dev_get(req_info,
-					  tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
-					  net, extack, require_dev);
-}
-
 int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info)
 {
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct sk_buff *rskb;
 	void *reply_payload;
 	int reply_len;
 	int ret;
 
-	ret = ethnl_tunnel_info_req_parse(&req_info, info->nlhdr,
-					  genl_info_net(info), info->extack,
-					  true);
+	ret = ethnl_parse_header_dev_get(&req_info,
+					 tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
+					 genl_info_net(info), info->extack,
+					 true);
 	if (ret < 0)
 		return ret;
 
@@ -233,16 +217,19 @@ struct ethnl_tunnel_info_dump_ctx {
 
 int ethnl_tunnel_info_start(struct netlink_callback *cb)
 {
+	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 	struct ethnl_tunnel_info_dump_ctx *ctx = (void *)cb->ctx;
+	struct nlattr **tb = info->attrs;
 	int ret;
 
 	BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 
 	memset(ctx, 0, sizeof(*ctx));
 
-	ret = ethnl_tunnel_info_req_parse(&ctx->req_info, cb->nlh,
-					  sock_net(cb->skb->sk), cb->extack,
-					  false);
+	ret = ethnl_parse_header_dev_get(&ctx->req_info,
+					 tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
+					 sock_net(cb->skb->sk), cb->extack,
+					 false);
 	if (ctx->req_info.dev) {
 		dev_put(ctx->req_info.dev);
 		ctx->req_info.dev = NULL;
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c
index 1798421e9f1c..5bc38e2f5f61 100644
--- a/net/ethtool/wol.c
+++ b/net/ethtool/wol.c
@@ -17,8 +17,7 @@ struct wol_reply_data {
 #define WOL_REPDATA(__reply_base) \
 	container_of(__reply_base, struct wol_reply_data, base)
 
-static const struct nla_policy
-wol_get_policy[ETHTOOL_A_WOL_MAX + 1] = {
+const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1] = {
 	[ETHTOOL_A_WOL_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_WOL_MODES]		= { .type = NLA_REJECT },
@@ -89,10 +88,8 @@ const struct ethnl_request_ops ethnl_wol_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_WOL_GET,
 	.reply_cmd		= ETHTOOL_MSG_WOL_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_WOL_HEADER,
-	.max_attr		= ETHTOOL_A_WOL_MAX,
 	.req_info_size		= sizeof(struct wol_req_info),
 	.reply_data_size	= sizeof(struct wol_reply_data),
-	.request_policy		= wol_get_policy,
 
 	.prepare_data		= wol_prepare_data,
 	.reply_size		= wol_reply_size,
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 2/7] ethtool: wire up set policies to ops
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 1/7] ethtool: wire up get policies to ops Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 3/7] ethtool: trim policy tables Jakub Kicinski
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

Similarly to get commands wire up the policies of set commands
to get parsing by the core and policy dumps.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/cabletest.c | 24 ++++++------------------
 net/ethtool/channels.c  | 11 +++--------
 net/ethtool/coalesce.c  | 11 +++--------
 net/ethtool/debug.c     | 10 ++--------
 net/ethtool/eee.c       | 11 +++--------
 net/ethtool/features.c  | 11 +++--------
 net/ethtool/linkinfo.c  | 11 +++--------
 net/ethtool/linkmodes.c | 11 +++--------
 net/ethtool/netlink.c   | 26 ++++++++++++++++++++++++++
 net/ethtool/netlink.h   | 13 +++++++++++++
 net/ethtool/pause.c     |  9 ++-------
 net/ethtool/privflags.c | 11 +++--------
 net/ethtool/rings.c     | 10 ++--------
 net/ethtool/wol.c       |  9 ++-------
 14 files changed, 74 insertions(+), 104 deletions(-)

diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index 888f6e101f34..beb85e0b7fc6 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -11,8 +11,8 @@
  */
 #define MAX_CABLE_LENGTH_CM (150 * 100)
 
-static const struct nla_policy
-cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
+const struct nla_policy
+ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
 	[ETHTOOL_A_CABLE_TEST_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_CABLE_TEST_HEADER]		= { .type = NLA_NESTED },
 };
@@ -56,18 +56,12 @@ static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
 
 int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_CABLE_TEST_MAX + 1];
 	struct ethnl_req_info req_info = {};
 	const struct ethtool_phy_ops *ops;
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_CABLE_TEST_MAX,
-			  cable_test_act_policy, info->extack);
-	if (ret < 0)
-		return ret;
-
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_CABLE_TEST_HEADER],
 					 genl_info_net(info), info->extack,
@@ -226,8 +220,8 @@ cable_test_tdr_act_cfg_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX + 1] = {
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]	= { .type = NLA_U8 },
 };
 
-static const struct nla_policy
-cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1] = {
+const struct nla_policy
+ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1] = {
 	[ETHTOOL_A_CABLE_TEST_TDR_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_CABLE_TEST_TDR_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG]		= { .type = NLA_NESTED },
@@ -313,19 +307,13 @@ static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
 
 int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1];
 	struct ethnl_req_info req_info = {};
 	const struct ethtool_phy_ops *ops;
+	struct nlattr **tb = info->attrs;
 	struct phy_tdr_config cfg;
 	struct net_device *dev;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_CABLE_TEST_TDR_MAX,
-			  cable_test_tdr_act_policy, info->extack);
-	if (ret < 0)
-		return ret;
-
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_CABLE_TEST_TDR_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 6ffcea099fd3..52227c6dcb59 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -109,8 +109,8 @@ const struct ethnl_request_ops ethnl_channels_request_ops = {
 
 /* CHANNELS_SET */
 
-static const struct nla_policy
-channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
+const struct nla_policy
+ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
 	[ETHTOOL_A_CHANNELS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_CHANNELS_RX_MAX]		= { .type = NLA_REJECT },
@@ -125,22 +125,17 @@ channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
 
 int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_CHANNELS_MAX + 1];
 	unsigned int from_channel, old_total, i;
 	bool mod = false, mod_combined = false;
 	struct ethtool_channels channels = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct nlattr *err_attr;
 	const struct ethtool_ops *ops;
 	struct net_device *dev;
 	u32 max_rx_in_use = 0;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_CHANNELS_MAX, channels_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_CHANNELS_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index 58a2eb375135..728cfe5cd527 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -213,8 +213,8 @@ const struct ethnl_request_ops ethnl_coalesce_request_ops = {
 
 /* COALESCE_SET */
 
-static const struct nla_policy
-coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
+const struct nla_policy
+ethnl_coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
 	[ETHTOOL_A_COALESCE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_COALESCE_RX_USECS]		= { .type = NLA_U32 },
@@ -243,9 +243,9 @@ coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
 
 int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_COALESCE_MAX + 1];
 	struct ethtool_coalesce coalesce = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct ethtool_ops *ops;
 	struct net_device *dev;
 	u32 supported_params;
@@ -253,11 +253,6 @@ int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info)
 	int ret;
 	u16 a;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_COALESCE_MAX, coalesce_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_COALESCE_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/debug.c b/net/ethtool/debug.c
index 67623ae94d41..0f40fc921546 100644
--- a/net/ethtool/debug.c
+++ b/net/ethtool/debug.c
@@ -78,8 +78,7 @@ const struct ethnl_request_ops ethnl_debug_request_ops = {
 
 /* DEBUG_SET */
 
-static const struct nla_policy
-debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
+const struct nla_policy ethnl_debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
 	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_NESTED },
@@ -87,18 +86,13 @@ debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
 
 int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_DEBUG_MAX + 1];
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	bool mod = false;
 	u32 msg_mask;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_DEBUG_MAX, debug_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_DEBUG_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/eee.c b/net/ethtool/eee.c
index 860e482533ba..6e35a041869b 100644
--- a/net/ethtool/eee.c
+++ b/net/ethtool/eee.c
@@ -128,8 +128,7 @@ const struct ethnl_request_ops ethnl_eee_request_ops = {
 
 /* EEE_SET */
 
-static const struct nla_policy
-eee_set_policy[ETHTOOL_A_EEE_MAX + 1] = {
+const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_MAX + 1] = {
 	[ETHTOOL_A_EEE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_EEE_MODES_OURS]	= { .type = NLA_NESTED },
@@ -142,18 +141,14 @@ eee_set_policy[ETHTOOL_A_EEE_MAX + 1] = {
 
 int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_EEE_MAX + 1];
-	struct ethtool_eee eee = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct ethtool_ops *ops;
+	struct ethtool_eee eee = {};
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_EEE_MAX,
-			  eee_set_policy, info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_EEE_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index bc1b1c74b1f5..e4a91d86824d 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -130,8 +130,8 @@ const struct ethnl_request_ops ethnl_features_request_ops = {
 
 /* FEATURES_SET */
 
-static const struct nla_policy
-features_set_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
+const struct nla_policy
+ethnl_features_set_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
 	[ETHTOOL_A_FEATURES_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_FEATURES_HW]		= { .type = NLA_REJECT },
@@ -227,17 +227,12 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 	DECLARE_BITMAP(new_wanted, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);
-	struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	bool mod;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_FEATURES_MAX, features_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	if (!tb[ETHTOOL_A_FEATURES_WANTED])
 		return -EINVAL;
 	ret = ethnl_parse_header_dev_get(&req_info,
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index eea75524e983..ba66ca54b9c2 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -93,8 +93,8 @@ const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
 
 /* LINKINFO_SET */
 
-static const struct nla_policy
-linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
+const struct nla_policy
+ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
 	[ETHTOOL_A_LINKINFO_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKINFO_PORT]		= { .type = NLA_U8 },
@@ -106,19 +106,14 @@ linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
 
 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_LINKINFO_MAX + 1];
 	struct ethtool_link_ksettings ksettings = {};
 	struct ethtool_link_settings *lsettings;
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_LINKINFO_MAX, linkinfo_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_LINKINFO_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index 8e0b4a12f875..77f0096bda2c 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -274,8 +274,8 @@ static const struct link_mode_info link_mode_params[] = {
 	__DEFINE_LINK_MODE_PARAMS(100, FX, Full),
 };
 
-static const struct nla_policy
-linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
+const struct nla_policy
+ethnl_linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
 	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_U8 },
@@ -390,18 +390,13 @@ static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
 
 int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1];
 	struct ethtool_link_ksettings ksettings = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_LINKMODES_MAX, linkmodes_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_LINKMODES_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 98031bdd8e8e..be6fd358114c 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -700,6 +700,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_linkinfo,
+		.policy = ethnl_linkinfo_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_LINKMODES_GET,
@@ -714,6 +716,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_linkmodes,
+		.policy = ethnl_linkmodes_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_LINKSTATE_GET,
@@ -737,6 +741,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_debug,
+		.policy = ethnl_debug_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_WOL_GET,
@@ -752,6 +758,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_WOL_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_wol,
+		.policy = ethnl_wol_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_FEATURES_GET,
@@ -766,6 +774,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_features,
+		.policy = ethnl_features_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_PRIVFLAGS_GET,
@@ -780,6 +790,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_privflags,
+		.policy = ethnl_privflags_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_RINGS_GET,
@@ -794,6 +806,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_RINGS_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_rings,
+		.policy = ethnl_rings_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_CHANNELS_GET,
@@ -808,6 +822,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_channels,
+		.policy = ethnl_channels_get_policy,
+		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_COALESCE_GET,
@@ -822,6 +838,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_COALESCE_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_coalesce,
+		.policy = ethnl_coalesce_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_PAUSE_GET,
@@ -836,6 +854,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_PAUSE_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_pause,
+		.policy = ethnl_pause_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_EEE_GET,
@@ -850,6 +870,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_EEE_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_eee,
+		.policy = ethnl_eee_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_TSINFO_GET,
@@ -864,11 +886,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_act_cable_test,
+		.policy = ethnl_cable_test_act_policy,
+		.maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_act_cable_test_tdr,
+		.policy = ethnl_cable_test_tdr_act_policy,
+		.maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_TUNNEL_INFO_GET,
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index d150f5f5e92b..7fee8ba81ef5 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -347,18 +347,31 @@ extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
 extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1];
 extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1];
+extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1];
 extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1];
+extern const struct nla_policy ethnl_linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1];
 extern const struct nla_policy ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1];
 extern const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1];
+extern const struct nla_policy ethnl_debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1];
 extern const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1];
+extern const struct nla_policy ethnl_wol_set_policy[ETHTOOL_A_WOL_MAX + 1];
 extern const struct nla_policy ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1];
+extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_MAX + 1];
 extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
+extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
 extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_MAX + 1];
 extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1];
+extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1];
 extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1];
+extern const struct nla_policy ethnl_coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1];
 extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1];
+extern const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1];
 extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1];
+extern const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_MAX + 1];
 extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];
+extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1];
+extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1];
 extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
 
 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index f753094fc52a..ff54e3ca030d 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -139,8 +139,7 @@ const struct ethnl_request_ops ethnl_pause_request_ops = {
 
 /* PAUSE_SET */
 
-static const struct nla_policy
-pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
+const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
 	[ETHTOOL_A_PAUSE_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_U8 },
@@ -151,18 +150,14 @@ pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
 
 int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_PAUSE_MAX + 1];
 	struct ethtool_pauseparam params = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct ethtool_ops *ops;
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_PAUSE_MAX,
-			  pause_set_policy, info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_PAUSE_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index 9dfdd9b3a19c..fd3754ca83e1 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -135,8 +135,8 @@ const struct ethnl_request_ops ethnl_privflags_request_ops = {
 
 /* PRIVFLAGS_SET */
 
-static const struct nla_policy
-privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
+const struct nla_policy
+ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
 	[ETHTOOL_A_PRIVFLAGS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PRIVFLAGS_FLAGS]		= { .type = NLA_NESTED },
@@ -144,9 +144,9 @@ privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
 
 int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_PRIVFLAGS_MAX + 1];
 	const char (*names)[ETH_GSTRING_LEN] = NULL;
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct ethtool_ops *ops;
 	struct net_device *dev;
 	unsigned int nflags;
@@ -155,11 +155,6 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
 	u32 flags;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_PRIVFLAGS_MAX, privflags_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	if (!tb[ETHTOOL_A_PRIVFLAGS_FLAGS])
 		return -EINVAL;
 	ret = ethnl_bitset_is_compact(tb[ETHTOOL_A_PRIVFLAGS_FLAGS], &compact);
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 006b70f54dd7..7e25127a727c 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -106,8 +106,7 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
 
 /* RINGS_SET */
 
-static const struct nla_policy
-rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
+const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
 	[ETHTOOL_A_RINGS_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_RINGS_RX_MAX]		= { .type = NLA_REJECT },
@@ -122,20 +121,15 @@ rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
 
 int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
 {
-	struct nlattr *tb[ETHTOOL_A_RINGS_MAX + 1];
 	struct ethtool_ringparam ringparam = {};
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	const struct nlattr *err_attr;
 	const struct ethtool_ops *ops;
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
-			  ETHTOOL_A_RINGS_MAX, rings_set_policy,
-			  info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info,
 					 tb[ETHTOOL_A_RINGS_HEADER],
 					 genl_info_net(info), info->extack,
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c
index 5bc38e2f5f61..5a306ffadffe 100644
--- a/net/ethtool/wol.c
+++ b/net/ethtool/wol.c
@@ -98,8 +98,7 @@ const struct ethnl_request_ops ethnl_wol_request_ops = {
 
 /* WOL_SET */
 
-static const struct nla_policy
-wol_set_policy[ETHTOOL_A_WOL_MAX + 1] = {
+const struct nla_policy ethnl_wol_set_policy[ETHTOOL_A_WOL_MAX + 1] = {
 	[ETHTOOL_A_WOL_UNSPEC]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_WOL_MODES]		= { .type = NLA_NESTED },
@@ -110,16 +109,12 @@ wol_set_policy[ETHTOOL_A_WOL_MAX + 1] = {
 int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info)
 {
 	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
-	struct nlattr *tb[ETHTOOL_A_WOL_MAX + 1];
 	struct ethnl_req_info req_info = {};
+	struct nlattr **tb = info->attrs;
 	struct net_device *dev;
 	bool mod = false;
 	int ret;
 
-	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_WOL_MAX,
-			  wol_set_policy, info->extack);
-	if (ret < 0)
-		return ret;
 	ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_WOL_HEADER],
 					 genl_info_net(info), info->extack,
 					 true);
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 3/7] ethtool: trim policy tables
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 1/7] ethtool: wire up get policies to ops Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 2/7] ethtool: wire up set " Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-08  9:12   ` Eric Dumazet
  2020-10-05 22:07 ` [PATCH net-next v2 4/7] ethtool: link up ethnl_header_policy as a nested policy Jakub Kicinski
                   ` (4 subsequent siblings)
  7 siblings, 1 reply; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

Since ethtool uses strict attribute validation there's no need
to initialize all attributes in policy tables. 0 is NLA_UNSPEC
which is going to be rejected. Remove the NLA_REJECTs.

Similarly attributes above maxattrs are rejected, so there's
no need to always size the policy tables to ETHTOOL_A_..._MAX.

v2: - new patch

Suggested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/bitset.c    | 26 +++++++++----------
 net/ethtool/cabletest.c | 19 ++++++--------
 net/ethtool/channels.c  | 20 ++-------------
 net/ethtool/coalesce.c  | 30 ++--------------------
 net/ethtool/debug.c     |  7 ++----
 net/ethtool/eee.c       | 14 ++---------
 net/ethtool/features.c  | 15 ++---------
 net/ethtool/linkinfo.c  | 15 ++---------
 net/ethtool/linkmodes.c | 17 ++-----------
 net/ethtool/linkstate.c |  9 +------
 net/ethtool/netlink.c   |  7 +++---
 net/ethtool/netlink.h   | 56 ++++++++++++++++++++---------------------
 net/ethtool/pause.c     | 11 ++------
 net/ethtool/privflags.c |  9 ++-----
 net/ethtool/rings.c     | 18 ++-----------
 net/ethtool/strset.c    | 20 ++++++---------
 net/ethtool/tsinfo.c    |  7 +-----
 net/ethtool/tunnels.c   |  4 +--
 net/ethtool/wol.c       |  8 ++----
 19 files changed, 83 insertions(+), 229 deletions(-)

diff --git a/net/ethtool/bitset.c b/net/ethtool/bitset.c
index dae7402eaca3..1fb3603d92ad 100644
--- a/net/ethtool/bitset.c
+++ b/net/ethtool/bitset.c
@@ -302,8 +302,7 @@ int ethnl_put_bitset32(struct sk_buff *skb, int attrtype, const u32 *val,
 	return -EMSGSIZE;
 }
 
-static const struct nla_policy bitset_policy[ETHTOOL_A_BITSET_MAX + 1] = {
-	[ETHTOOL_A_BITSET_UNSPEC]	= { .type = NLA_REJECT },
+static const struct nla_policy bitset_policy[] = {
 	[ETHTOOL_A_BITSET_NOMASK]	= { .type = NLA_FLAG },
 	[ETHTOOL_A_BITSET_SIZE]		= NLA_POLICY_MAX(NLA_U32,
 							 ETHNL_MAX_BITSET_SIZE),
@@ -312,8 +311,7 @@ static const struct nla_policy bitset_policy[ETHTOOL_A_BITSET_MAX + 1] = {
 	[ETHTOOL_A_BITSET_MASK]		= { .type = NLA_BINARY },
 };
 
-static const struct nla_policy bit_policy[ETHTOOL_A_BITSET_BIT_MAX + 1] = {
-	[ETHTOOL_A_BITSET_BIT_UNSPEC]	= { .type = NLA_REJECT },
+static const struct nla_policy bit_policy[] = {
 	[ETHTOOL_A_BITSET_BIT_INDEX]	= { .type = NLA_U32 },
 	[ETHTOOL_A_BITSET_BIT_NAME]	= { .type = NLA_NUL_STRING },
 	[ETHTOOL_A_BITSET_BIT_VALUE]	= { .type = NLA_FLAG },
@@ -329,10 +327,10 @@ static const struct nla_policy bit_policy[ETHTOOL_A_BITSET_BIT_MAX + 1] = {
  */
 int ethnl_bitset_is_compact(const struct nlattr *bitset, bool *compact)
 {
-	struct nlattr *tb[ETHTOOL_A_BITSET_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(bitset_policy)];
 	int ret;
 
-	ret = nla_parse_nested(tb, ETHTOOL_A_BITSET_MAX, bitset,
+	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, bitset,
 			       bitset_policy, NULL);
 	if (ret < 0)
 		return ret;
@@ -381,10 +379,10 @@ static int ethnl_parse_bit(unsigned int *index, bool *val, unsigned int nbits,
 			   ethnl_string_array_t names,
 			   struct netlink_ext_ack *extack)
 {
-	struct nlattr *tb[ETHTOOL_A_BITSET_BIT_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(bit_policy)];
 	int ret, idx;
 
-	ret = nla_parse_nested(tb, ETHTOOL_A_BITSET_BIT_MAX, bit_attr,
+	ret = nla_parse_nested(tb, ARRAY_SIZE(bit_policy) - 1, bit_attr,
 			       bit_policy, extack);
 	if (ret < 0)
 		return ret;
@@ -555,15 +553,15 @@ int ethnl_update_bitset32(u32 *bitmap, unsigned int nbits,
 			  const struct nlattr *attr, ethnl_string_array_t names,
 			  struct netlink_ext_ack *extack, bool *mod)
 {
-	struct nlattr *tb[ETHTOOL_A_BITSET_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(bitset_policy)];
 	unsigned int change_bits;
 	bool no_mask;
 	int ret;
 
 	if (!attr)
 		return 0;
-	ret = nla_parse_nested(tb, ETHTOOL_A_BITSET_MAX, attr, bitset_policy,
-			       extack);
+	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, attr,
+			       bitset_policy, extack);
 	if (ret < 0)
 		return ret;
 
@@ -608,7 +606,7 @@ int ethnl_parse_bitset(unsigned long *val, unsigned long *mask,
 		       ethnl_string_array_t names,
 		       struct netlink_ext_ack *extack)
 {
-	struct nlattr *tb[ETHTOOL_A_BITSET_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(bitset_policy)];
 	const struct nlattr *bit_attr;
 	bool no_mask;
 	int rem;
@@ -616,8 +614,8 @@ int ethnl_parse_bitset(unsigned long *val, unsigned long *mask,
 
 	if (!attr)
 		return 0;
-	ret = nla_parse_nested(tb, ETHTOOL_A_BITSET_MAX, attr, bitset_policy,
-			       extack);
+	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, attr,
+			       bitset_policy, extack);
 	if (ret < 0)
 		return ret;
 	no_mask = tb[ETHTOOL_A_BITSET_NOMASK];
diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index beb85e0b7fc6..6f3328be6592 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -11,9 +11,7 @@
  */
 #define MAX_CABLE_LENGTH_CM (150 * 100)
 
-const struct nla_policy
-ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
-	[ETHTOOL_A_CABLE_TEST_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_cable_test_act_policy[] = {
 	[ETHTOOL_A_CABLE_TEST_HEADER]		= { .type = NLA_NESTED },
 };
 
@@ -212,17 +210,14 @@ struct cable_test_tdr_req_info {
 	struct ethnl_req_info		base;
 };
 
-static const struct nla_policy
-cable_test_tdr_act_cfg_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX + 1] = {
+static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]	= { .type = NLA_U32 },
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]	= { .type = NLA_U32 },
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]	= { .type = NLA_U32 },
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]	= { .type = NLA_U8 },
 };
 
-const struct nla_policy
-ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1] = {
-	[ETHTOOL_A_CABLE_TEST_TDR_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_cable_test_tdr_act_policy[] = {
 	[ETHTOOL_A_CABLE_TEST_TDR_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG]		= { .type = NLA_NESTED },
 };
@@ -232,7 +227,7 @@ static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
 					struct genl_info *info,
 					struct phy_tdr_config *cfg)
 {
-	struct nlattr *tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(cable_test_tdr_act_cfg_policy)];
 	int ret;
 
 	cfg->first = 100;
@@ -243,8 +238,10 @@ static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
 	if (!nest)
 		return 0;
 
-	ret = nla_parse_nested(tb, ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX, nest,
-			       cable_test_tdr_act_cfg_policy, info->extack);
+	ret = nla_parse_nested(tb,
+			       ARRAY_SIZE(cable_test_tdr_act_cfg_policy) - 1,
+			       nest, cable_test_tdr_act_cfg_policy,
+			       info->extack);
 	if (ret < 0)
 		return ret;
 
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 52227c6dcb59..2a0cea0ad648 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -17,18 +17,8 @@ struct channels_reply_data {
 #define CHANNELS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct channels_reply_data, base)
 
-const struct nla_policy
-ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
-	[ETHTOOL_A_CHANNELS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_channels_get_policy[] = {
 	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_CHANNELS_RX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_TX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_OTHER_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_COMBINED_MAX]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_RX_COUNT]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_TX_COUNT]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_OTHER_COUNT]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_COMBINED_COUNT]	= { .type = NLA_REJECT },
 };
 
 static int channels_prepare_data(const struct ethnl_req_info *req_base,
@@ -109,14 +99,8 @@ const struct ethnl_request_ops ethnl_channels_request_ops = {
 
 /* CHANNELS_SET */
 
-const struct nla_policy
-ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
-	[ETHTOOL_A_CHANNELS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_channels_set_policy[] = {
 	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_CHANNELS_RX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_TX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_OTHER_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_CHANNELS_COMBINED_MAX]	= { .type = NLA_REJECT },
 	[ETHTOOL_A_CHANNELS_RX_COUNT]		= { .type = NLA_U32 },
 	[ETHTOOL_A_CHANNELS_TX_COUNT]		= { .type = NLA_U32 },
 	[ETHTOOL_A_CHANNELS_OTHER_COUNT]	= { .type = NLA_U32 },
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index 728cfe5cd527..c46d4247403a 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -51,32 +51,8 @@ __CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
 __CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
 __CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
 
-const struct nla_policy
-ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
-	[ETHTOOL_A_COALESCE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_coalesce_get_policy[] = {
 	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_COALESCE_RX_USECS]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_USECS_IRQ]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_USECS]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_MAX_FRAMES]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_USECS_IRQ]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_PKT_RATE_LOW]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_USECS_LOW]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_USECS_LOW]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_PKT_RATE_HIGH]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_USECS_HIGH]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_USECS_HIGH]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_REJECT },
 };
 
 static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
@@ -213,9 +189,7 @@ const struct ethnl_request_ops ethnl_coalesce_request_ops = {
 
 /* COALESCE_SET */
 
-const struct nla_policy
-ethnl_coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
-	[ETHTOOL_A_COALESCE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_coalesce_set_policy[] = {
 	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_COALESCE_RX_USECS]		= { .type = NLA_U32 },
 	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES]	= { .type = NLA_U32 },
diff --git a/net/ethtool/debug.c b/net/ethtool/debug.c
index 0f40fc921546..dbd3243ccae5 100644
--- a/net/ethtool/debug.c
+++ b/net/ethtool/debug.c
@@ -16,10 +16,8 @@ struct debug_reply_data {
 #define DEBUG_REPDATA(__reply_base) \
 	container_of(__reply_base, struct debug_reply_data, base)
 
-const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
-	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_debug_get_policy[] = {
 	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
-	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_REJECT },
 };
 
 static int debug_prepare_data(const struct ethnl_req_info *req_base,
@@ -78,8 +76,7 @@ const struct ethnl_request_ops ethnl_debug_request_ops = {
 
 /* DEBUG_SET */
 
-const struct nla_policy ethnl_debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
-	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_debug_set_policy[] = {
 	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_NESTED },
 };
diff --git a/net/ethtool/eee.c b/net/ethtool/eee.c
index 6e35a041869b..d40a573d1eba 100644
--- a/net/ethtool/eee.c
+++ b/net/ethtool/eee.c
@@ -19,15 +19,8 @@ struct eee_reply_data {
 #define EEE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct eee_reply_data, base)
 
-const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1] = {
-	[ETHTOOL_A_EEE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_eee_get_policy[] = {
 	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_EEE_MODES_OURS]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_MODES_PEER]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_ACTIVE]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_ENABLED]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_TX_LPI_ENABLED]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_TX_LPI_TIMER]	= { .type = NLA_REJECT },
 };
 
 static int eee_prepare_data(const struct ethnl_req_info *req_base,
@@ -128,12 +121,9 @@ const struct ethnl_request_ops ethnl_eee_request_ops = {
 
 /* EEE_SET */
 
-const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_MAX + 1] = {
-	[ETHTOOL_A_EEE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_eee_set_policy[] = {
 	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_EEE_MODES_OURS]	= { .type = NLA_NESTED },
-	[ETHTOOL_A_EEE_MODES_PEER]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_EEE_ACTIVE]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_EEE_ENABLED]		= { .type = NLA_U8 },
 	[ETHTOOL_A_EEE_TX_LPI_ENABLED]	= { .type = NLA_U8 },
 	[ETHTOOL_A_EEE_TX_LPI_TIMER]	= { .type = NLA_U32 },
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index e4a91d86824d..920386cf7d0a 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -20,14 +20,8 @@ struct features_reply_data {
 #define FEATURES_REPDATA(__reply_base) \
 	container_of(__reply_base, struct features_reply_data, base)
 
-const struct nla_policy
-ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
-	[ETHTOOL_A_FEATURES_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_features_get_policy[] = {
 	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
-	[ETHTOOL_A_FEATURES_HW]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_FEATURES_WANTED]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_FEATURES_ACTIVE]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_FEATURES_NOCHANGE]	= { .type = NLA_REJECT },
 };
 
 static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t src)
@@ -130,14 +124,9 @@ const struct ethnl_request_ops ethnl_features_request_ops = {
 
 /* FEATURES_SET */
 
-const struct nla_policy
-ethnl_features_set_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
-	[ETHTOOL_A_FEATURES_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_features_set_policy[] = {
 	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
-	[ETHTOOL_A_FEATURES_HW]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_FEATURES_WANTED]	= { .type = NLA_NESTED },
-	[ETHTOOL_A_FEATURES_ACTIVE]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_FEATURES_NOCHANGE]	= { .type = NLA_REJECT },
 };
 
 static void ethnl_features_to_bitmap(unsigned long *dest, netdev_features_t val)
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index ba66ca54b9c2..0c9161801bc7 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -16,15 +16,8 @@ struct linkinfo_reply_data {
 #define LINKINFO_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkinfo_reply_data, base)
 
-const struct nla_policy
-ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
-	[ETHTOOL_A_LINKINFO_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_linkinfo_get_policy[] = {
 	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_LINKINFO_PORT]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKINFO_PHYADDR]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKINFO_TP_MDIX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKINFO_TRANSCEIVER]	= { .type = NLA_REJECT },
 };
 
 static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
@@ -93,15 +86,11 @@ const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
 
 /* LINKINFO_SET */
 
-const struct nla_policy
-ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
-	[ETHTOOL_A_LINKINFO_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_linkinfo_set_policy[] = {
 	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKINFO_PORT]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKINFO_PHYADDR]		= { .type = NLA_U8 },
-	[ETHTOOL_A_LINKINFO_TP_MDIX]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL]	= { .type = NLA_U8 },
-	[ETHTOOL_A_LINKINFO_TRANSCEIVER]	= { .type = NLA_REJECT },
 };
 
 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index 77f0096bda2c..dcef79b6a2d2 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -18,17 +18,8 @@ struct linkmodes_reply_data {
 #define LINKMODES_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkmodes_reply_data, base)
 
-const struct nla_policy
-ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
-	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_linkmodes_get_policy[] = {
 	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_PEER]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_DUPLEX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE]	= { .type = NLA_REJECT },
 };
 
 static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
@@ -274,17 +265,13 @@ static const struct link_mode_info link_mode_params[] = {
 	__DEFINE_LINK_MODE_PARAMS(100, FX, Full),
 };
 
-const struct nla_policy
-ethnl_linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
-	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_linkmodes_set_policy[] = {
 	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_LINKMODES_PEER]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_U32 },
 	[ETHTOOL_A_LINKMODES_DUPLEX]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG]	= { .type = NLA_U8 },
-	[ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE]	= { .type = NLA_REJECT },
 };
 
 /* Set advertised link modes to all supported modes matching requested speed
diff --git a/net/ethtool/linkstate.c b/net/ethtool/linkstate.c
index ebd6dcff1dad..fc36e73d8b7f 100644
--- a/net/ethtool/linkstate.c
+++ b/net/ethtool/linkstate.c
@@ -20,15 +20,8 @@ struct linkstate_reply_data {
 #define LINKSTATE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct linkstate_reply_data, base)
 
-const struct nla_policy
-ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1] = {
-	[ETHTOOL_A_LINKSTATE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_linkstate_get_policy[] = {
 	[ETHTOOL_A_LINKSTATE_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_LINKSTATE_LINK]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKSTATE_SQI]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKSTATE_SQI_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKSTATE_EXT_STATE]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_LINKSTATE_EXT_SUBSTATE]	= { .type = NLA_REJECT },
 };
 
 static int linkstate_get_sqi(struct net_device *dev)
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index be6fd358114c..dec1185db5ea 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -9,8 +9,7 @@ static struct genl_family ethtool_genl_family;
 static bool ethnl_ok __read_mostly;
 static u32 ethnl_bcast_seq;
 
-static const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_MAX + 1] = {
-	[ETHTOOL_A_HEADER_UNSPEC]	= { .type = NLA_REJECT },
+static const struct nla_policy ethnl_header_policy[] = {
 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
 					    .len = ALTIFNAMSIZ - 1 },
@@ -37,7 +36,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
 			       const struct nlattr *header, struct net *net,
 			       struct netlink_ext_ack *extack, bool require_dev)
 {
-	struct nlattr *tb[ETHTOOL_A_HEADER_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)];
 	const struct nlattr *devname_attr;
 	struct net_device *dev = NULL;
 	u32 flags = 0;
@@ -47,7 +46,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
 		NL_SET_ERR_MSG(extack, "request header missing");
 		return -EINVAL;
 	}
-	ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header,
+	ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
 			       ethnl_header_policy, extack);
 	if (ret < 0)
 		return ret;
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 7fee8ba81ef5..2cfbc016393c 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -345,34 +345,34 @@ extern const struct ethnl_request_ops ethnl_pause_request_ops;
 extern const struct ethnl_request_ops ethnl_eee_request_ops;
 extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
-extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1];
-extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1];
-extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1];
-extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1];
-extern const struct nla_policy ethnl_linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1];
-extern const struct nla_policy ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1];
-extern const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1];
-extern const struct nla_policy ethnl_debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1];
-extern const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1];
-extern const struct nla_policy ethnl_wol_set_policy[ETHTOOL_A_WOL_MAX + 1];
-extern const struct nla_policy ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1];
-extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_MAX + 1];
-extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
-extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
-extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1];
-extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_MAX + 1];
-extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1];
-extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1];
-extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1];
-extern const struct nla_policy ethnl_coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1];
-extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1];
-extern const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1];
-extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1];
-extern const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_MAX + 1];
-extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];
-extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1];
-extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1];
-extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
+extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1];
+extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1];
+extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1];
+extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_HEADER + 1];
+extern const struct nla_policy ethnl_linkmodes_set_policy[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG + 1];
+extern const struct nla_policy ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_HEADER + 1];
+extern const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_HEADER + 1];
+extern const struct nla_policy ethnl_debug_set_policy[ETHTOOL_A_DEBUG_MSGMASK + 1];
+extern const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_HEADER + 1];
+extern const struct nla_policy ethnl_wol_set_policy[ETHTOOL_A_WOL_SOPASS + 1];
+extern const struct nla_policy ethnl_features_get_policy[ETHTOOL_A_FEATURES_HEADER + 1];
+extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_WANTED + 1];
+extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_HEADER + 1];
+extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_FLAGS + 1];
+extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_HEADER + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_TX + 1];
+extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_HEADER + 1];
+extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_COMBINED_COUNT + 1];
+extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_HEADER + 1];
+extern const struct nla_policy ethnl_coalesce_set_policy[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL + 1];
+extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_HEADER + 1];
+extern const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_TX + 1];
+extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_HEADER + 1];
+extern const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_TX_LPI_TIMER + 1];
+extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_HEADER + 1];
+extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_HEADER + 1];
+extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG + 1];
+extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_HEADER + 1];
 
 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
 int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index ff54e3ca030d..084798d629a8 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -16,13 +16,8 @@ struct pause_reply_data {
 #define PAUSE_REPDATA(__reply_base) \
 	container_of(__reply_base, struct pause_reply_data, base)
 
-const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
-	[ETHTOOL_A_PAUSE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_pause_get_policy[] = {
 	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_PAUSE_RX]			= { .type = NLA_REJECT },
-	[ETHTOOL_A_PAUSE_TX]			= { .type = NLA_REJECT },
-	[ETHTOOL_A_PAUSE_STATS]			= { .type = NLA_REJECT },
 };
 
 static void ethtool_stats_init(u64 *stats, unsigned int n)
@@ -139,13 +134,11 @@ const struct ethnl_request_ops ethnl_pause_request_ops = {
 
 /* PAUSE_SET */
 
-const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
-	[ETHTOOL_A_PAUSE_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_pause_set_policy[] = {
 	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_U8 },
 	[ETHTOOL_A_PAUSE_RX]			= { .type = NLA_U8 },
 	[ETHTOOL_A_PAUSE_TX]			= { .type = NLA_U8 },
-	[ETHTOOL_A_PAUSE_STATS]			= { .type = NLA_REJECT },
 };
 
 int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index fd3754ca83e1..050d3d428a59 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -18,11 +18,8 @@ struct privflags_reply_data {
 #define PRIVFLAGS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct privflags_reply_data, base)
 
-const struct nla_policy
-ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
-	[ETHTOOL_A_PRIVFLAGS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_privflags_get_policy[] = {
 	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_PRIVFLAGS_FLAGS]		= { .type = NLA_REJECT },
 };
 
 static int ethnl_get_priv_flags_info(struct net_device *dev,
@@ -135,9 +132,7 @@ const struct ethnl_request_ops ethnl_privflags_request_ops = {
 
 /* PRIVFLAGS_SET */
 
-const struct nla_policy
-ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
-	[ETHTOOL_A_PRIVFLAGS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_privflags_set_policy[] = {
 	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_PRIVFLAGS_FLAGS]		= { .type = NLA_NESTED },
 };
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 7e25127a727c..da5d9041b2b1 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -15,17 +15,8 @@ struct rings_reply_data {
 #define RINGS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct rings_reply_data, base)
 
-const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
-	[ETHTOOL_A_RINGS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_rings_get_policy[] = {
 	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_RINGS_RX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_MINI_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_JUMBO_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_TX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX]			= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_MINI]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_JUMBO]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_TX]			= { .type = NLA_REJECT },
 };
 
 static int rings_prepare_data(const struct ethnl_req_info *req_base,
@@ -106,13 +97,8 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
 
 /* RINGS_SET */
 
-const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
-	[ETHTOOL_A_RINGS_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_rings_set_policy[] = {
 	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_RINGS_RX_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_MINI_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_RX_JUMBO_MAX]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_RINGS_TX_MAX]		= { .type = NLA_REJECT },
 	[ETHTOOL_A_RINGS_RX]			= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_RX_MINI]		= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_RX_JUMBO]		= { .type = NLA_U32 },
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 9adff4668004..02199570c3fc 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -99,18 +99,13 @@ struct strset_reply_data {
 #define STRSET_REPDATA(__reply_base) \
 	container_of(__reply_base, struct strset_reply_data, base)
 
-const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1] = {
-	[ETHTOOL_A_STRSET_UNSPEC]	= { .type = NLA_REJECT },
+const struct nla_policy ethnl_strset_get_policy[] = {
 	[ETHTOOL_A_STRSET_HEADER]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
 };
 
-static const struct nla_policy
-get_stringset_policy[ETHTOOL_A_STRINGSET_MAX + 1] = {
-	[ETHTOOL_A_STRINGSET_UNSPEC]	= { .type = NLA_REJECT },
+static const struct nla_policy get_stringset_policy[] = {
 	[ETHTOOL_A_STRINGSET_ID]	= { .type = NLA_U32 },
-	[ETHTOOL_A_STRINGSET_COUNT]	= { .type = NLA_REJECT },
-	[ETHTOOL_A_STRINGSET_STRINGS]	= { .type = NLA_REJECT },
 };
 
 /**
@@ -138,10 +133,10 @@ static bool strset_include(const struct strset_req_info *info,
 static int strset_get_id(const struct nlattr *nest, u32 *val,
 			 struct netlink_ext_ack *extack)
 {
-	struct nlattr *tb[ETHTOOL_A_STRINGSET_MAX + 1];
+	struct nlattr *tb[ARRAY_SIZE(get_stringset_policy)];
 	int ret;
 
-	ret = nla_parse_nested(tb, ETHTOOL_A_STRINGSET_MAX, nest,
+	ret = nla_parse_nested(tb, ARRAY_SIZE(get_stringset_policy) - 1, nest,
 			       get_stringset_policy, extack);
 	if (ret < 0)
 		return ret;
@@ -152,9 +147,7 @@ static int strset_get_id(const struct nlattr *nest, u32 *val,
 	return 0;
 }
 
-static const struct nla_policy
-strset_stringsets_policy[ETHTOOL_A_STRINGSETS_MAX + 1] = {
-	[ETHTOOL_A_STRINGSETS_UNSPEC]		= { .type = NLA_REJECT },
+static const struct nla_policy strset_stringsets_policy[] = {
 	[ETHTOOL_A_STRINGSETS_STRINGSET]	= { .type = NLA_NESTED },
 };
 
@@ -169,7 +162,8 @@ static int strset_parse_request(struct ethnl_req_info *req_base,
 
 	if (!nest)
 		return 0;
-	ret = nla_validate_nested(nest, ETHTOOL_A_STRINGSETS_MAX,
+	ret = nla_validate_nested(nest,
+				  ARRAY_SIZE(strset_stringsets_policy) - 1,
 				  strset_stringsets_policy, extack);
 	if (ret < 0)
 		return ret;
diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c
index 21f0dc08cead..6f050b81b77c 100644
--- a/net/ethtool/tsinfo.c
+++ b/net/ethtool/tsinfo.c
@@ -18,13 +18,8 @@ struct tsinfo_reply_data {
 #define TSINFO_REPDATA(__reply_base) \
 	container_of(__reply_base, struct tsinfo_reply_data, base)
 
-const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
-	[ETHTOOL_A_TSINFO_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_tsinfo_get_policy[] = {
 	[ETHTOOL_A_TSINFO_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_TSINFO_TIMESTAMPING]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_TSINFO_TX_TYPES]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_TSINFO_RX_FILTERS]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_TSINFO_PHC_INDEX]		= { .type = NLA_REJECT },
 };
 
 static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
diff --git a/net/ethtool/tunnels.c b/net/ethtool/tunnels.c
index 330817adcf62..48a52951917e 100644
--- a/net/ethtool/tunnels.c
+++ b/net/ethtool/tunnels.c
@@ -8,9 +8,7 @@
 #include "common.h"
 #include "netlink.h"
 
-const struct nla_policy
-ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1] = {
-	[ETHTOOL_A_TUNNEL_INFO_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_tunnel_info_get_policy[] = {
 	[ETHTOOL_A_TUNNEL_INFO_HEADER]		= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c
index 5a306ffadffe..7671089c119d 100644
--- a/net/ethtool/wol.c
+++ b/net/ethtool/wol.c
@@ -17,11 +17,8 @@ struct wol_reply_data {
 #define WOL_REPDATA(__reply_base) \
 	container_of(__reply_base, struct wol_reply_data, base)
 
-const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1] = {
-	[ETHTOOL_A_WOL_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_wol_get_policy[] = {
 	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
-	[ETHTOOL_A_WOL_MODES]		= { .type = NLA_REJECT },
-	[ETHTOOL_A_WOL_SOPASS]		= { .type = NLA_REJECT },
 };
 
 static int wol_prepare_data(const struct ethnl_req_info *req_base,
@@ -98,8 +95,7 @@ const struct ethnl_request_ops ethnl_wol_request_ops = {
 
 /* WOL_SET */
 
-const struct nla_policy ethnl_wol_set_policy[ETHTOOL_A_WOL_MAX + 1] = {
-	[ETHTOOL_A_WOL_UNSPEC]		= { .type = NLA_REJECT },
+const struct nla_policy ethnl_wol_set_policy[] = {
 	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_WOL_MODES]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_WOL_SOPASS]		= { .type = NLA_BINARY,
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 3/7] ethtool: trim policy tables
  2020-10-05 22:07 ` [PATCH net-next v2 3/7] ethtool: trim policy tables Jakub Kicinski
@ 2020-10-08  9:12   ` Eric Dumazet
  2020-10-08  9:13     ` Johannes Berg
  0 siblings, 1 reply; 22+ messages in thread
From: Eric Dumazet @ 2020-10-08  9:12 UTC (permalink / raw)
  To: Jakub Kicinski, davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek



On 10/6/20 12:07 AM, Jakub Kicinski wrote:
> Since ethtool uses strict attribute validation there's no need
> to initialize all attributes in policy tables. 0 is NLA_UNSPEC
> which is going to be rejected. Remove the NLA_REJECTs.
> 
> Similarly attributes above maxattrs are rejected, so there's
> no need to always size the policy tables to ETHTOOL_A_..._MAX.
> 

This implies that all policy tables must be 'complete'.

strset_stringsets_policy[] for example is :

static const struct nla_policy strset_stringsets_policy[] = {
    [ETHTOOL_A_STRINGSETS_STRINGSET]    = { .type = NLA_NESTED },
};

So when later strset_parse_request() does :

req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];

We have an out-of-bound access since ETHTOOL_A_STRSET_COUNTS_ONLY > ETHTOOL_A_STRINGSETS_STRINGSET

Not sure what was the expected type for this attribute, the kernel
only looks at its presence, not its value.

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 3/7] ethtool: trim policy tables
  2020-10-08  9:12   ` Eric Dumazet
@ 2020-10-08  9:13     ` Johannes Berg
  2020-10-08  9:15       ` Johannes Berg
  0 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2020-10-08  9:13 UTC (permalink / raw)
  To: Eric Dumazet, Jakub Kicinski, davem
  Cc: netdev, kernel-team, jiri, andrew, mkubecek

On Thu, 2020-10-08 at 11:12 +0200, Eric Dumazet wrote:
> 
> On 10/6/20 12:07 AM, Jakub Kicinski wrote:
> > Since ethtool uses strict attribute validation there's no need
> > to initialize all attributes in policy tables. 0 is NLA_UNSPEC
> > which is going to be rejected. Remove the NLA_REJECTs.
> > 
> > Similarly attributes above maxattrs are rejected, so there's
> > no need to always size the policy tables to ETHTOOL_A_..._MAX.
> > 
> 
> This implies that all policy tables must be 'complete'.
> 
> strset_stringsets_policy[] for example is :
> 
> static const struct nla_policy strset_stringsets_policy[] = {
>     [ETHTOOL_A_STRINGSETS_STRINGSET]    = { .type = NLA_NESTED },
> };
> 
> So when later strset_parse_request() does :
> 
> req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
> 
> We have an out-of-bound access since ETHTOOL_A_STRSET_COUNTS_ONLY > ETHTOOL_A_STRINGSETS_STRINGSET

Yeah, Leon Romanovsky reported actually running into this yesterday, and
I sent a fix :-)

> Not sure what was the expected type for this attribute, the kernel
> only looks at its presence, not its value.

It was NLA_FLAG, but never actually in the policy, so you could never
even successfully use it ...

Here was the fix
https://lore.kernel.org/netdev/20201007125348.a74389e18168.Ieab7a871e27b9698826e75dc9e825e4ddbc852b1@changeid/

johannes


^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 3/7] ethtool: trim policy tables
  2020-10-08  9:13     ` Johannes Berg
@ 2020-10-08  9:15       ` Johannes Berg
  2020-10-08 15:09         ` Eric Dumazet
  0 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2020-10-08  9:15 UTC (permalink / raw)
  To: Eric Dumazet, Jakub Kicinski, davem
  Cc: netdev, kernel-team, jiri, andrew, mkubecek

On Thu, 2020-10-08 at 11:13 +0200, Johannes Berg wrote:

> > This implies that all policy tables must be 'complete'.

Also, yes they had to be complete already, perhaps *except* for NLA_FLAG
like this below use ...

> > So when later strset_parse_request() does :
> > 
> > req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
> > 
> Here was the fix
> https://lore.kernel.org/netdev/20201007125348.a74389e18168.Ieab7a871e27b9698826e75dc9e825e4ddbc852b1@changeid/

Sorry, wrong link

https://lore.kernel.org/netdev/20201007125348.a0b250308599.Ie9b429e276d064f28ce12db01fffa430e5c770e0@changeid/

johannes


^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 3/7] ethtool: trim policy tables
  2020-10-08  9:15       ` Johannes Berg
@ 2020-10-08 15:09         ` Eric Dumazet
  0 siblings, 0 replies; 22+ messages in thread
From: Eric Dumazet @ 2020-10-08 15:09 UTC (permalink / raw)
  To: Johannes Berg, Eric Dumazet, Jakub Kicinski, davem
  Cc: netdev, kernel-team, jiri, andrew, mkubecek



On 10/8/20 11:15 AM, Johannes Berg wrote:
> On Thu, 2020-10-08 at 11:13 +0200, Johannes Berg wrote:
> 
>>> This implies that all policy tables must be 'complete'.
> 
> Also, yes they had to be complete already, perhaps *except* for NLA_FLAG
> like this below use ...
> 
>>> So when later strset_parse_request() does :
>>>
>>> req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
>>>
>> Here was the fix
>> https://lore.kernel.org/netdev/20201007125348.a74389e18168.Ieab7a871e27b9698826e75dc9e825e4ddbc852b1@changeid/
> 
> Sorry, wrong link
> 
> https://lore.kernel.org/netdev/20201007125348.a0b250308599.Ie9b429e276d064f28ce12db01fffa430e5c770e0@changeid/
> 
> johannes
> 

SGTM, thanks !

^ permalink raw reply	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 4/7] ethtool: link up ethnl_header_policy as a nested policy
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
                   ` (2 preceding siblings ...)
  2020-10-05 22:07 ` [PATCH net-next v2 3/7] ethtool: trim policy tables Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 5/7] netlink: create helpers for checking type is an int Jakub Kicinski
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

To get the most out of parsing by the core, and to allow dumping
full policies we need to specify which policy applies to nested
attrs. For headers it's ethnl_header_policy.

$ sed -i 's@\(ETHTOOL_A_.*HEADER\].*=\) { .type = NLA_NESTED },@\1\n\t\tNLA_POLICY_NESTED(ethnl_header_policy),@' net/ethtool/*

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/cabletest.c | 6 ++++--
 net/ethtool/channels.c  | 6 ++++--
 net/ethtool/coalesce.c  | 6 ++++--
 net/ethtool/debug.c     | 6 ++++--
 net/ethtool/eee.c       | 6 ++++--
 net/ethtool/features.c  | 6 ++++--
 net/ethtool/linkinfo.c  | 6 ++++--
 net/ethtool/linkmodes.c | 6 ++++--
 net/ethtool/linkstate.c | 3 ++-
 net/ethtool/netlink.c   | 2 +-
 net/ethtool/netlink.h   | 1 +
 net/ethtool/pause.c     | 6 ++++--
 net/ethtool/privflags.c | 6 ++++--
 net/ethtool/rings.c     | 6 ++++--
 net/ethtool/strset.c    | 3 ++-
 net/ethtool/tsinfo.c    | 3 ++-
 net/ethtool/tunnels.c   | 3 ++-
 net/ethtool/wol.c       | 6 ++++--
 18 files changed, 58 insertions(+), 29 deletions(-)

diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index 6f3328be6592..63560bbb7d1f 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -12,7 +12,8 @@
 #define MAX_CABLE_LENGTH_CM (150 * 100)
 
 const struct nla_policy ethnl_cable_test_act_policy[] = {
-	[ETHTOOL_A_CABLE_TEST_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_CABLE_TEST_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
@@ -218,7 +219,8 @@ static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
 };
 
 const struct nla_policy ethnl_cable_test_tdr_act_policy[] = {
-	[ETHTOOL_A_CABLE_TEST_TDR_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_CABLE_TEST_TDR_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_CABLE_TEST_TDR_CFG]		= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 2a0cea0ad648..5635604cb9ba 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -18,7 +18,8 @@ struct channels_reply_data {
 	container_of(__reply_base, struct channels_reply_data, base)
 
 const struct nla_policy ethnl_channels_get_policy[] = {
-	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_CHANNELS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int channels_prepare_data(const struct ethnl_req_info *req_base,
@@ -100,7 +101,8 @@ const struct ethnl_request_ops ethnl_channels_request_ops = {
 /* CHANNELS_SET */
 
 const struct nla_policy ethnl_channels_set_policy[] = {
-	[ETHTOOL_A_CHANNELS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_CHANNELS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_CHANNELS_RX_COUNT]		= { .type = NLA_U32 },
 	[ETHTOOL_A_CHANNELS_TX_COUNT]		= { .type = NLA_U32 },
 	[ETHTOOL_A_CHANNELS_OTHER_COUNT]	= { .type = NLA_U32 },
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index c46d4247403a..1d6bc132aa4d 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -52,7 +52,8 @@ __CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
 __CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
 
 const struct nla_policy ethnl_coalesce_get_policy[] = {
-	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_COALESCE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
@@ -190,7 +191,8 @@ const struct ethnl_request_ops ethnl_coalesce_request_ops = {
 /* COALESCE_SET */
 
 const struct nla_policy ethnl_coalesce_set_policy[] = {
-	[ETHTOOL_A_COALESCE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_COALESCE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_COALESCE_RX_USECS]		= { .type = NLA_U32 },
 	[ETHTOOL_A_COALESCE_RX_MAX_FRAMES]	= { .type = NLA_U32 },
 	[ETHTOOL_A_COALESCE_RX_USECS_IRQ]	= { .type = NLA_U32 },
diff --git a/net/ethtool/debug.c b/net/ethtool/debug.c
index dbd3243ccae5..f99912d7957e 100644
--- a/net/ethtool/debug.c
+++ b/net/ethtool/debug.c
@@ -17,7 +17,8 @@ struct debug_reply_data {
 	container_of(__reply_base, struct debug_reply_data, base)
 
 const struct nla_policy ethnl_debug_get_policy[] = {
-	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_DEBUG_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int debug_prepare_data(const struct ethnl_req_info *req_base,
@@ -77,7 +78,8 @@ const struct ethnl_request_ops ethnl_debug_request_ops = {
 /* DEBUG_SET */
 
 const struct nla_policy ethnl_debug_set_policy[] = {
-	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_DEBUG_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/eee.c b/net/ethtool/eee.c
index d40a573d1eba..901b7de941ab 100644
--- a/net/ethtool/eee.c
+++ b/net/ethtool/eee.c
@@ -20,7 +20,8 @@ struct eee_reply_data {
 	container_of(__reply_base, struct eee_reply_data, base)
 
 const struct nla_policy ethnl_eee_get_policy[] = {
-	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_EEE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int eee_prepare_data(const struct ethnl_req_info *req_base,
@@ -122,7 +123,8 @@ const struct ethnl_request_ops ethnl_eee_request_ops = {
 /* EEE_SET */
 
 const struct nla_policy ethnl_eee_set_policy[] = {
-	[ETHTOOL_A_EEE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_EEE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_EEE_MODES_OURS]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_EEE_ENABLED]		= { .type = NLA_U8 },
 	[ETHTOOL_A_EEE_TX_LPI_ENABLED]	= { .type = NLA_U8 },
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 920386cf7d0a..8ee4cdbd6b82 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -21,7 +21,8 @@ struct features_reply_data {
 	container_of(__reply_base, struct features_reply_data, base)
 
 const struct nla_policy ethnl_features_get_policy[] = {
-	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_FEATURES_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t src)
@@ -125,7 +126,8 @@ const struct ethnl_request_ops ethnl_features_request_ops = {
 /* FEATURES_SET */
 
 const struct nla_policy ethnl_features_set_policy[] = {
-	[ETHTOOL_A_FEATURES_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_FEATURES_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_FEATURES_WANTED]	= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index 0c9161801bc7..b91839870efc 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -17,7 +17,8 @@ struct linkinfo_reply_data {
 	container_of(__reply_base, struct linkinfo_reply_data, base)
 
 const struct nla_policy ethnl_linkinfo_get_policy[] = {
-	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_LINKINFO_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
@@ -87,7 +88,8 @@ const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
 /* LINKINFO_SET */
 
 const struct nla_policy ethnl_linkinfo_set_policy[] = {
-	[ETHTOOL_A_LINKINFO_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_LINKINFO_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_LINKINFO_PORT]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKINFO_PHYADDR]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL]	= { .type = NLA_U8 },
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index dcef79b6a2d2..c5bcb9abc8b9 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -19,7 +19,8 @@ struct linkmodes_reply_data {
 	container_of(__reply_base, struct linkmodes_reply_data, base)
 
 const struct nla_policy ethnl_linkmodes_get_policy[] = {
-	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_LINKMODES_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
@@ -266,7 +267,8 @@ static const struct link_mode_info link_mode_params[] = {
 };
 
 const struct nla_policy ethnl_linkmodes_set_policy[] = {
-	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_LINKMODES_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_U8 },
 	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_U32 },
diff --git a/net/ethtool/linkstate.c b/net/ethtool/linkstate.c
index fc36e73d8b7f..fb676f349455 100644
--- a/net/ethtool/linkstate.c
+++ b/net/ethtool/linkstate.c
@@ -21,7 +21,8 @@ struct linkstate_reply_data {
 	container_of(__reply_base, struct linkstate_reply_data, base)
 
 const struct nla_policy ethnl_linkstate_get_policy[] = {
-	[ETHTOOL_A_LINKSTATE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_LINKSTATE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int linkstate_get_sqi(struct net_device *dev)
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index dec1185db5ea..57b5bbb7f48f 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -9,7 +9,7 @@ static struct genl_family ethtool_genl_family;
 static bool ethnl_ok __read_mostly;
 static u32 ethnl_bcast_seq;
 
-static const struct nla_policy ethnl_header_policy[] = {
+const struct nla_policy ethnl_header_policy[] = {
 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
 					    .len = ALTIFNAMSIZ - 1 },
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 2cfbc016393c..281d793d4557 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -345,6 +345,7 @@ extern const struct ethnl_request_ops ethnl_pause_request_ops;
 extern const struct ethnl_request_ops ethnl_eee_request_ops;
 extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
+extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
 extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1];
 extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1];
 extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1];
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index 084798d629a8..bf4013afd8b2 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -17,7 +17,8 @@ struct pause_reply_data {
 	container_of(__reply_base, struct pause_reply_data, base)
 
 const struct nla_policy ethnl_pause_get_policy[] = {
-	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_PAUSE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static void ethtool_stats_init(u64 *stats, unsigned int n)
@@ -135,7 +136,8 @@ const struct ethnl_request_ops ethnl_pause_request_ops = {
 /* PAUSE_SET */
 
 const struct nla_policy ethnl_pause_set_policy[] = {
-	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_PAUSE_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_U8 },
 	[ETHTOOL_A_PAUSE_RX]			= { .type = NLA_U8 },
 	[ETHTOOL_A_PAUSE_TX]			= { .type = NLA_U8 },
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index 050d3d428a59..fc9f3be23a19 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -19,7 +19,8 @@ struct privflags_reply_data {
 	container_of(__reply_base, struct privflags_reply_data, base)
 
 const struct nla_policy ethnl_privflags_get_policy[] = {
-	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_PRIVFLAGS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int ethnl_get_priv_flags_info(struct net_device *dev,
@@ -133,7 +134,8 @@ const struct ethnl_request_ops ethnl_privflags_request_ops = {
 /* PRIVFLAGS_SET */
 
 const struct nla_policy ethnl_privflags_set_policy[] = {
-	[ETHTOOL_A_PRIVFLAGS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_PRIVFLAGS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_PRIVFLAGS_FLAGS]		= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index da5d9041b2b1..4e097812a967 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -16,7 +16,8 @@ struct rings_reply_data {
 	container_of(__reply_base, struct rings_reply_data, base)
 
 const struct nla_policy ethnl_rings_get_policy[] = {
-	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_RINGS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int rings_prepare_data(const struct ethnl_req_info *req_base,
@@ -98,7 +99,8 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
 /* RINGS_SET */
 
 const struct nla_policy ethnl_rings_set_policy[] = {
-	[ETHTOOL_A_RINGS_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_RINGS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_RINGS_RX]			= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_RX_MINI]		= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_RX_JUMBO]		= { .type = NLA_U32 },
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 02199570c3fc..0734e83c674c 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -100,7 +100,8 @@ struct strset_reply_data {
 	container_of(__reply_base, struct strset_reply_data, base)
 
 const struct nla_policy ethnl_strset_get_policy[] = {
-	[ETHTOOL_A_STRSET_HEADER]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_STRSET_HEADER]	=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
 };
 
diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c
index 6f050b81b77c..63b5814bd460 100644
--- a/net/ethtool/tsinfo.c
+++ b/net/ethtool/tsinfo.c
@@ -19,7 +19,8 @@ struct tsinfo_reply_data {
 	container_of(__reply_base, struct tsinfo_reply_data, base)
 
 const struct nla_policy ethnl_tsinfo_get_policy[] = {
-	[ETHTOOL_A_TSINFO_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_TSINFO_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
diff --git a/net/ethtool/tunnels.c b/net/ethtool/tunnels.c
index 48a52951917e..e7f2ee0d2471 100644
--- a/net/ethtool/tunnels.c
+++ b/net/ethtool/tunnels.c
@@ -9,7 +9,8 @@
 #include "netlink.h"
 
 const struct nla_policy ethnl_tunnel_info_get_policy[] = {
-	[ETHTOOL_A_TUNNEL_INFO_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_TUNNEL_INFO_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static_assert(ETHTOOL_UDP_TUNNEL_TYPE_VXLAN == ilog2(UDP_TUNNEL_TYPE_VXLAN));
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c
index 7671089c119d..ada7df2331d2 100644
--- a/net/ethtool/wol.c
+++ b/net/ethtool/wol.c
@@ -18,7 +18,8 @@ struct wol_reply_data {
 	container_of(__reply_base, struct wol_reply_data, base)
 
 const struct nla_policy ethnl_wol_get_policy[] = {
-	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_WOL_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 };
 
 static int wol_prepare_data(const struct ethnl_req_info *req_base,
@@ -96,7 +97,8 @@ const struct ethnl_request_ops ethnl_wol_request_ops = {
 /* WOL_SET */
 
 const struct nla_policy ethnl_wol_set_policy[] = {
-	[ETHTOOL_A_WOL_HEADER]		= { .type = NLA_NESTED },
+	[ETHTOOL_A_WOL_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_WOL_MODES]		= { .type = NLA_NESTED },
 	[ETHTOOL_A_WOL_SOPASS]		= { .type = NLA_BINARY,
 					    .len = SOPASS_MAX },
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 5/7] netlink: create helpers for checking type is an int
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
                   ` (3 preceding siblings ...)
  2020-10-05 22:07 ` [PATCH net-next v2 4/7] ethtool: link up ethnl_header_policy as a nested policy Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 6/7] netlink: add mask validation Jakub Kicinski
                   ` (2 subsequent siblings)
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek,
	Jakub Kicinski, dsahern, pablo

There's a number of policies which check if type is a uint or sint.
Factor the checking against the list of value sizes to a helper
for easier reuse.

v2: - new patch

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: jiri@resnulli.us
CC: dsahern@gmail.com
CC: pablo@netfilter.org
---
 include/net/netlink.h | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/net/netlink.h b/include/net/netlink.h
index 5a5ff97cc596..c5aa46f379bc 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -362,20 +362,21 @@ struct nla_policy {
 #define NLA_POLICY_BITFIELD32(valid) \
 	{ .type = NLA_BITFIELD32, .bitfield32_valid = valid }
 
+#define __NLA_IS_UINT_TYPE(tp)						\
+	(tp == NLA_U8 || tp == NLA_U16 || tp == NLA_U32 || tp == NLA_U64)
+#define __NLA_IS_SINT_TYPE(tp)						\
+	(tp == NLA_S8 || tp == NLA_S16 || tp == NLA_S32 || tp == NLA_S64)
+
 #define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition))
 #define NLA_ENSURE_UINT_OR_BINARY_TYPE(tp)		\
-	(__NLA_ENSURE(tp == NLA_U8 || tp == NLA_U16 ||	\
-		      tp == NLA_U32 || tp == NLA_U64 ||	\
+	(__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp) ||	\
 		      tp == NLA_MSECS ||		\
 		      tp == NLA_BINARY) + tp)
 #define NLA_ENSURE_SINT_TYPE(tp)			\
-	(__NLA_ENSURE(tp == NLA_S8 || tp == NLA_S16  ||	\
-		      tp == NLA_S32 || tp == NLA_S64) + tp)
+	(__NLA_ENSURE(__NLA_IS_SINT_TYPE(tp)) + tp)
 #define NLA_ENSURE_INT_OR_BINARY_TYPE(tp)		\
-	(__NLA_ENSURE(tp == NLA_S8 || tp == NLA_U8 ||	\
-		      tp == NLA_S16 || tp == NLA_U16 ||	\
-		      tp == NLA_S32 || tp == NLA_U32 ||	\
-		      tp == NLA_S64 || tp == NLA_U64 ||	\
+	(__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp) ||		\
+		      __NLA_IS_SINT_TYPE(tp) ||		\
 		      tp == NLA_MSECS ||		\
 		      tp == NLA_BINARY) + tp)
 #define NLA_ENSURE_NO_VALIDATION_PTR(tp)		\
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 6/7] netlink: add mask validation
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
                   ` (4 preceding siblings ...)
  2020-10-05 22:07 ` [PATCH net-next v2 5/7] netlink: create helpers for checking type is an int Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-05 22:07 ` [PATCH net-next v2 7/7] ethtool: specify which header flags are supported per command Jakub Kicinski
  2020-10-06  6:43 ` [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Johannes Berg
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek,
	Jakub Kicinski, dsahern, pablo

We don't have good validation policy for existing unsigned int attrs
which serve as flags (for new ones we could use NLA_BITFIELD32).
With increased use of policy dumping having the validation be
expressed as part of the policy is important. Add validation
policy in form of a mask of supported/valid bits.

Support u64 in the uAPI to be future-proof, but really for now
the embedded mask member can only hold 32 bits, so anything with
bit 32+ set will always fail validation.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: jiri@resnulli.us
CC: dsahern@gmail.com
CC: pablo@netfilter.org
---
 include/net/netlink.h        | 10 ++++++++++
 include/uapi/linux/netlink.h |  2 ++
 lib/nlattr.c                 | 36 ++++++++++++++++++++++++++++++++++++
 net/netlink/policy.c         |  8 ++++++++
 4 files changed, 56 insertions(+)

diff --git a/include/net/netlink.h b/include/net/netlink.h
index c5aa46f379bc..2b9e41075f19 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -200,6 +200,7 @@ enum nla_policy_validation {
 	NLA_VALIDATE_RANGE_WARN_TOO_LONG,
 	NLA_VALIDATE_MIN,
 	NLA_VALIDATE_MAX,
+	NLA_VALIDATE_MASK,
 	NLA_VALIDATE_RANGE_PTR,
 	NLA_VALIDATE_FUNCTION,
 };
@@ -317,6 +318,7 @@ struct nla_policy {
 	u16		len;
 	union {
 		const u32 bitfield32_valid;
+		const u32 mask;
 		const char *reject_message;
 		const struct nla_policy *nested_policy;
 		struct netlink_range_validation *range;
@@ -368,6 +370,8 @@ struct nla_policy {
 	(tp == NLA_S8 || tp == NLA_S16 || tp == NLA_S32 || tp == NLA_S64)
 
 #define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition))
+#define NLA_ENSURE_UINT_TYPE(tp)			\
+	(__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp)) + tp)
 #define NLA_ENSURE_UINT_OR_BINARY_TYPE(tp)		\
 	(__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp) ||	\
 		      tp == NLA_MSECS ||		\
@@ -416,6 +420,12 @@ struct nla_policy {
 	.max = _max,					\
 }
 
+#define NLA_POLICY_MASK(tp, _mask) {			\
+	.type = NLA_ENSURE_UINT_TYPE(tp),		\
+	.validation_type = NLA_VALIDATE_MASK,		\
+	.mask = _mask,					\
+}
+
 #define NLA_POLICY_VALIDATE_FN(tp, fn, ...) {		\
 	.type = NLA_ENSURE_NO_VALIDATION_PTR(tp),	\
 	.validation_type = NLA_VALIDATE_FUNCTION,	\
diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h
index eac8a6a648ea..d02e472ba54c 100644
--- a/include/uapi/linux/netlink.h
+++ b/include/uapi/linux/netlink.h
@@ -331,6 +331,7 @@ enum netlink_attribute_type {
  *	the index, if limited inside the nesting (U32)
  * @NL_POLICY_TYPE_ATTR_BITFIELD32_MASK: valid mask for the
  *	bitfield32 type (U32)
+ * @NL_POLICY_TYPE_ATTR_MASK: mask of valid bits for unsigned integers (U64)
  * @NL_POLICY_TYPE_ATTR_PAD: pad attribute for 64-bit alignment
  */
 enum netlink_policy_type_attr {
@@ -346,6 +347,7 @@ enum netlink_policy_type_attr {
 	NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE,
 	NL_POLICY_TYPE_ATTR_BITFIELD32_MASK,
 	NL_POLICY_TYPE_ATTR_PAD,
+	NL_POLICY_TYPE_ATTR_MASK,
 
 	/* keep last */
 	__NL_POLICY_TYPE_ATTR_MAX,
diff --git a/lib/nlattr.c b/lib/nlattr.c
index 80ff9fe83696..9c99f5daa4d2 100644
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -323,6 +323,37 @@ static int nla_validate_int_range(const struct nla_policy *pt,
 	}
 }
 
+static int nla_validate_mask(const struct nla_policy *pt,
+			     const struct nlattr *nla,
+			     struct netlink_ext_ack *extack)
+{
+	u64 value;
+
+	switch (pt->type) {
+	case NLA_U8:
+		value = nla_get_u8(nla);
+		break;
+	case NLA_U16:
+		value = nla_get_u16(nla);
+		break;
+	case NLA_U32:
+		value = nla_get_u32(nla);
+		break;
+	case NLA_U64:
+		value = nla_get_u64(nla);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (value & ~(u64)pt->mask) {
+		NL_SET_ERR_MSG_ATTR(extack, nla, "reserved bit set");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int validate_nla(const struct nlattr *nla, int maxtype,
 			const struct nla_policy *policy, unsigned int validate,
 			struct netlink_ext_ack *extack, unsigned int depth)
@@ -503,6 +534,11 @@ static int validate_nla(const struct nlattr *nla, int maxtype,
 		if (err)
 			return err;
 		break;
+	case NLA_VALIDATE_MASK:
+		err = nla_validate_mask(pt, nla, extack);
+		if (err)
+			return err;
+		break;
 	case NLA_VALIDATE_FUNCTION:
 		if (pt->validate) {
 			err = pt->validate(nla, extack);
diff --git a/net/netlink/policy.c b/net/netlink/policy.c
index cf23c0151721..ee26d01328ee 100644
--- a/net/netlink/policy.c
+++ b/net/netlink/policy.c
@@ -263,6 +263,14 @@ int netlink_policy_dump_write(struct sk_buff *skb,
 		else
 			type = NL_ATTR_TYPE_U64;
 
+		if (pt->validation_type == NLA_VALIDATE_MASK) {
+			if (nla_put_u64_64bit(skb, NL_POLICY_TYPE_ATTR_MASK,
+					      pt->mask,
+					      NL_POLICY_TYPE_ATTR_PAD))
+				goto nla_put_failure;
+			break;
+		}
+
 		nla_get_range_unsigned(pt, &range);
 
 		if (nla_put_u64_64bit(skb, NL_POLICY_TYPE_ATTR_MIN_VALUE_U,
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* [PATCH net-next v2 7/7] ethtool: specify which header flags are supported per command
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
                   ` (5 preceding siblings ...)
  2020-10-05 22:07 ` [PATCH net-next v2 6/7] netlink: add mask validation Jakub Kicinski
@ 2020-10-05 22:07 ` Jakub Kicinski
  2020-10-06  6:43 ` [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Johannes Berg
  7 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2020-10-05 22:07 UTC (permalink / raw)
  To: davem
  Cc: netdev, kernel-team, johannes, jiri, andrew, mkubecek, Jakub Kicinski

Perform header flags validation through the policy.

Only pause command supports ETHTOOL_FLAG_STATS. Create a separate
policy to be able to express that in policy dumps to user space.

Note that even though the core will validate the header policy,
it cannot record multiple layers of attributes and we have to
re-parse header sub-attrs. When doing so we could skip attribute
validation, or use most permissive policy. Opt for the former.

We will no longer return the extack cookie for flags but since
we only added first new flag in this release it's not expected
that any user space had a chance to make use of it.

v2: - remove the re-validation in ethnl_parse_header_dev_get()

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/ethtool/netlink.c | 29 +++++++++++++++++++----------
 net/ethtool/netlink.h |  1 +
 net/ethtool/pause.c   |  2 +-
 3 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 57b5bbb7f48f..066608488af8 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -9,11 +9,24 @@ static struct genl_family ethtool_genl_family;
 static bool ethnl_ok __read_mostly;
 static u32 ethnl_bcast_seq;
 
+#define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |	\
+			     ETHTOOL_FLAG_OMIT_REPLY)
+#define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
+
 const struct nla_policy ethnl_header_policy[] = {
 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
 					    .len = ALTIFNAMSIZ - 1 },
-	[ETHTOOL_A_HEADER_FLAGS]	= { .type = NLA_U32 },
+	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
+							  ETHTOOL_FLAGS_BASIC),
+};
+
+const struct nla_policy ethnl_header_policy_stats[] = {
+	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
+	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
+					    .len = ALTIFNAMSIZ - 1 },
+	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
+							  ETHTOOL_FLAGS_STATS),
 };
 
 /**
@@ -46,19 +59,15 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
 		NL_SET_ERR_MSG(extack, "request header missing");
 		return -EINVAL;
 	}
+	/* No validation here, command policy should have a nested policy set
+	 * for the header, therefore validation should have already been done.
+	 */
 	ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
-			       ethnl_header_policy, extack);
+			       NULL, extack);
 	if (ret < 0)
 		return ret;
-	if (tb[ETHTOOL_A_HEADER_FLAGS]) {
+	if (tb[ETHTOOL_A_HEADER_FLAGS])
 		flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
-		if (flags & ~ETHTOOL_FLAG_ALL) {
-			NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_HEADER_FLAGS],
-					    "unrecognized request flags");
-			nl_set_extack_cookie_u32(extack, ETHTOOL_FLAG_ALL);
-			return -EOPNOTSUPP;
-		}
-	}
 
 	devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 	if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 281d793d4557..3f5719786b0f 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -346,6 +346,7 @@ extern const struct ethnl_request_ops ethnl_eee_request_ops;
 extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
 extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
+extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
 extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1];
 extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1];
 extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1];
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index bf4013afd8b2..09998dc5c185 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -18,7 +18,7 @@ struct pause_reply_data {
 
 const struct nla_policy ethnl_pause_get_policy[] = {
 	[ETHTOOL_A_PAUSE_HEADER]		=
-		NLA_POLICY_NESTED(ethnl_header_policy),
+		NLA_POLICY_NESTED(ethnl_header_policy_stats),
 };
 
 static void ethtool_stats_init(u64 *stats, unsigned int n)
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
                   ` (6 preceding siblings ...)
  2020-10-05 22:07 ` [PATCH net-next v2 7/7] ethtool: specify which header flags are supported per command Jakub Kicinski
@ 2020-10-06  6:43 ` Johannes Berg
  2020-10-06 13:26   ` David Miller
  7 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2020-10-06  6:43 UTC (permalink / raw)
  To: Jakub Kicinski, davem; +Cc: netdev, kernel-team, jiri, andrew, mkubecek

On Mon, 2020-10-05 at 15:07 -0700, Jakub Kicinski wrote:
> Hi!
> 
> This series wires up ethtool policies to ops, so they can be
> dumped to user space for feature discovery.
> 
> First patch wires up GET commands, and second patch wires up SETs.
> 
> The policy tables are trimmed to save space and LoC.
> 
> Next - take care of linking up nested policies for the header
> (which is the policy what we actually care about). And once header
> policy is linked make sure that attribute range validation for flags
> is done by policy, not a conditions in the code. New type of policy
> is needed to validate masks (patch 6).
> 
> Netlink as always staying a step ahead of all the other kernel
> API interfaces :)
> 
> v2:
>  - merge patches 1 & 2 -> 1
>  - add patch 3 & 5
>  - remove .max_attr from struct ethnl_request_ops
> 

Looks good!

Reviewed-by: Johannes Berg <johannes@sipsolutions.net>

johannes


^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-06  6:43 ` [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Johannes Berg
@ 2020-10-06 13:26   ` David Miller
  2020-10-07  6:27     ` Leon Romanovsky
  0 siblings, 1 reply; 22+ messages in thread
From: David Miller @ 2020-10-06 13:26 UTC (permalink / raw)
  To: johannes; +Cc: kuba, netdev, kernel-team, jiri, andrew, mkubecek

From: Johannes Berg <johannes@sipsolutions.net>
Date: Tue, 06 Oct 2020 08:43:17 +0200

> On Mon, 2020-10-05 at 15:07 -0700, Jakub Kicinski wrote:
>> Hi!
>> 
>> This series wires up ethtool policies to ops, so they can be
>> dumped to user space for feature discovery.
>> 
>> First patch wires up GET commands, and second patch wires up SETs.
>> 
>> The policy tables are trimmed to save space and LoC.
>> 
>> Next - take care of linking up nested policies for the header
>> (which is the policy what we actually care about). And once header
>> policy is linked make sure that attribute range validation for flags
>> is done by policy, not a conditions in the code. New type of policy
>> is needed to validate masks (patch 6).
>> 
>> Netlink as always staying a step ahead of all the other kernel
>> API interfaces :)
 ...
> Reviewed-by: Johannes Berg <johannes@sipsolutions.net>

Series applied, thanks everyone.

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-06 13:26   ` David Miller
@ 2020-10-07  6:27     ` Leon Romanovsky
  2020-10-07  7:30       ` Johannes Berg
  0 siblings, 1 reply; 22+ messages in thread
From: Leon Romanovsky @ 2020-10-07  6:27 UTC (permalink / raw)
  To: David Miller, johannes, kuba
  Cc: netdev, kernel-team, jiri, andrew, mkubecek, Saeed Mahameed

On Tue, Oct 06, 2020 at 06:26:18AM -0700, David Miller wrote:
> From: Johannes Berg <johannes@sipsolutions.net>
> Date: Tue, 06 Oct 2020 08:43:17 +0200
>
> > On Mon, 2020-10-05 at 15:07 -0700, Jakub Kicinski wrote:
> >> Hi!
> >>
> >> This series wires up ethtool policies to ops, so they can be
> >> dumped to user space for feature discovery.
> >>
> >> First patch wires up GET commands, and second patch wires up SETs.
> >>
> >> The policy tables are trimmed to save space and LoC.
> >>
> >> Next - take care of linking up nested policies for the header
> >> (which is the policy what we actually care about). And once header
> >> policy is linked make sure that attribute range validation for flags
> >> is done by policy, not a conditions in the code. New type of policy
> >> is needed to validate masks (patch 6).
> >>
> >> Netlink as always staying a step ahead of all the other kernel
> >> API interfaces :)
>  ...
> > Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
>
> Series applied, thanks everyone.

Hi Dave, Johannes and Jakub

This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
generates the following KASAN out-of-bound error.

 [ 187.278416] ==================================================================
 [  187.282872] BUG: KASAN: slab-out-of-bounds in strset_parse_request+0x3ef/0x480
 [  187.284499] Read of size 8 at addr ffff88828db2b158 by task ethtool/3949
 [  187.285927]
 [  187.286406] CPU: 0 PID: 3949 Comm: ethtool Not tainted 5.9.0-rc8_master_8f9ef66 #1
 [  187.288135] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
 [  187.290526] Call Trace:
 [  187.291190]  dump_stack+0x9a/0xd0
 [  187.292028]  ? strset_parse_request+0x3ef/0x480
 [  187.293069]  print_address_description.constprop.0+0x1c/0x220
 [  187.294331]  ? nla_get_range_signed+0x540/0x540
 [  187.295373]  ? strset_parse_request+0x3ef/0x480
 [  187.296421]  ? strset_parse_request+0x3ef/0x480
 [  187.297458]  kasan_report.cold+0x1f/0x37
 [  187.298387]  ? strset_parse_request+0x3ef/0x480
 [  187.299422]  strset_parse_request+0x3ef/0x480
 [  187.300434]  ? ethnl_default_dumpit+0xcd0/0xcd0
 [  187.301483]  ? strset_cleanup_data+0xd0/0xd0
 [  187.302489]  ethnl_default_parse+0xb3/0x110
 [  187.303476]  ethnl_default_doit+0x223/0x950
 [  187.304454]  ? ethnl_reply_init+0x1b0/0x1b0
 [  187.305433]  ? __nla_parse+0x22/0x25
 [  187.306292]  ? genl_family_rcv_msg_attrs_parse.constprop.0+0x15e/0x230
 [  187.307708]  genl_family_rcv_msg_doit+0x1e9/0x2f0
 [  187.308797]  ? genl_family_rcv_msg_attrs_parse.constprop.0+0x230/0x230
 [  187.310218]  ? register_lock_class+0x1650/0x1650
 [  187.311273]  genl_rcv_msg+0x27f/0x4a0
 [  187.312166]  ? genl_get_cmd+0x3c0/0x3c0
 [  187.313074]  ? lock_acquire+0x1da/0x9c0
 [  187.313978]  ? genl_rcv+0x15/0x40
 [  187.314788]  ? ethnl_reply_init+0x1b0/0x1b0
 [  187.315766]  ? ethnl_default_parse+0x110/0x110
 [  187.316781]  ? ethnl_fill_reply_header.part.0+0x2d0/0x2d0
 [  187.317998]  ? get_order+0x20/0x20
 [  187.318840]  ? check_flags+0x60/0x60
 [  187.319712]  netlink_rcv_skb+0x124/0x350
 [  187.320642]  ? genl_get_cmd+0x3c0/0x3c0
 [  187.321558]  ? netlink_ack+0x8b0/0x8b0
 [  187.322462]  ? __might_fault+0xef/0x1a0
 [  187.323383]  genl_rcv+0x24/0x40
 [  187.324199]  netlink_unicast+0x433/0x700
 [  187.325157]  ? netlink_attachskb+0x6f0/0x6f0
 [  187.326151]  ? __alloc_skb+0x32a/0x530
 [  187.327048]  netlink_sendmsg+0x6f1/0xbd0
 [  187.328010]  ? netlink_unicast+0x700/0x700
 [  187.328996]  ? netlink_unicast+0x700/0x700
 [  187.329953]  sock_sendmsg+0xb0/0xe0
 [  187.330824]  __sys_sendto+0x193/0x240
 [  187.331736]  ? __x64_sys_getpeername+0xb0/0xb0
 [  187.332781]  ? do_raw_spin_unlock+0x54/0x220
 [  187.333794]  ? __up_read+0x1a1/0x7b0
 [  187.334738]  __x64_sys_sendto+0xdd/0x1b0
 [  187.335718]  ? syscall_enter_from_user_mode+0x1d/0x50
 [  187.336889]  do_syscall_64+0x2d/0x40
 [  187.337744]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 [  187.338949] RIP: 0033:0x7fe429352efa
 [  187.339870] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 76 c3 0f 1f 44 00 00 55 48 83 ec 30 44 89 4c
 [  187.343971] RSP: 002b:00007ffc105fc268 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
 [  187.345764] RAX: ffffffffffffffda RBX: 000000000198c430 RCX: 00007fe429352efa
 [  187.347386] RDX: 0000000000000028 RSI: 000000000198c4a0 RDI: 0000000000000004
 [  187.349015] RBP: 000000000198c4a0 R08: 00007fe42941e000 R09: 000000000000000c
 [  187.350637] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000042f4f0
 [  187.352239] R13: 000000000197c3a0 R14: 000000000197c2a0 R15: 000000000197c3a0
 [  187.353791]
 [  187.354283] Allocated by task 3949:
 [  187.355145]  kasan_save_stack+0x1b/0x40
 [  187.356067]  __kasan_kmalloc.constprop.0+0xc2/0xd0
 [  187.357182]  genl_family_rcv_msg_attrs_parse.constprop.0+0xb5/0x230
 [  187.358567]  genl_family_rcv_msg_doit+0xc7/0x2f0
 [  187.359651]  genl_rcv_msg+0x27f/0x4a0
 [  187.360519]  netlink_rcv_skb+0x124/0x350
 [  187.361464]  genl_rcv+0x24/0x40
 [  187.362260]  netlink_unicast+0x433/0x700
 [  187.363177]  netlink_sendmsg+0x6f1/0xbd0
 [  187.364096]  sock_sendmsg+0xb0/0xe0
 [  187.364959]  __sys_sendto+0x193/0x240
 [  187.365885]  __x64_sys_sendto+0xdd/0x1b0
 [  187.366797]  do_syscall_64+0x2d/0x40
 [  187.367695]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 [  187.368900]
 [  187.369400] The buggy address belongs to the object at ffff88828db2b140
 [  187.369400]  which belongs to the cache kmalloc-32 of size 32
 [  187.372134] The buggy address is located 24 bytes inside of
 [  187.372134]  32-byte region [ffff88828db2b140, ffff88828db2b160)
 [  187.374713] The buggy address belongs to the page:
 [  187.375884] page:00000000980aee13 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88828db2bc80 pfn:0x28db2b
 [  187.378286] flags: 0x8000000000000200(slab)
 [  187.379318] raw: 8000000000000200 ffffea0009be8a80 0000001b0000001b ffff8882a3043a40
 [  187.381156] raw: ffff88828db2bc80 0000000080400039 00000001ffffffff 0000000000000000
 [  187.382973] page dumped because: kasan: bad access detected
 [  187.384252]
 [  187.384747] Memory state around the buggy address:
 [  187.385825]  ffff88828db2b000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 [  187.387479]  ffff88828db2b080: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
 [  187.389103] >ffff88828db2b100: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
 [  187.390707]                                                     ^
 [  187.392050]  ffff88828db2b180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 [  187.393693]  ffff88828db2b200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 [  187.395314] ==================================================================

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  6:27     ` Leon Romanovsky
@ 2020-10-07  7:30       ` Johannes Berg
  2020-10-07  8:24         ` Leon Romanovsky
  0 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2020-10-07  7:30 UTC (permalink / raw)
  To: Leon Romanovsky, David Miller, kuba
  Cc: netdev, kernel-team, jiri, andrew, mkubecek, Saeed Mahameed

On Wed, 2020-10-07 at 09:27 +0300, Leon Romanovsky wrote:
> 
> This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
> generates the following KASAN out-of-bound error.

Interesting. I guess that is

	req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];

which basically means that before you never actually *use* the
ETHTOOL_A_STRSET_COUNTS_ONLY flag, but of course it shouldn't be doing
this ...

Does this fix it?

diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 3f5719786b0f..d8efec516d86 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -347,7 +347,7 @@ extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
 
 extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
 extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
-extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1];
+extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_COUNTS_ONLY + 1];
 extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1];
 extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1];
 extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_HEADER + 1];
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 0734e83c674c..0baad0ce1832 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -103,6 +103,7 @@ const struct nla_policy ethnl_strset_get_policy[] = {
 	[ETHTOOL_A_STRSET_HEADER]	=
 		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
+	[ETHTOOL_A_STRSET_COUNTS_ONLY]	= { .type = NLA_FLAG },
 };
 
 static const struct nla_policy get_stringset_policy[] = {

johannes


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  7:30       ` Johannes Berg
@ 2020-10-07  8:24         ` Leon Romanovsky
  2020-10-07  8:29           ` Johannes Berg
  2020-10-07  8:52           ` Michal Kubecek
  0 siblings, 2 replies; 22+ messages in thread
From: Leon Romanovsky @ 2020-10-07  8:24 UTC (permalink / raw)
  To: Johannes Berg
  Cc: David Miller, kuba, netdev, kernel-team, jiri, andrew, mkubecek,
	Saeed Mahameed

On Wed, Oct 07, 2020 at 09:30:51AM +0200, Johannes Berg wrote:
> On Wed, 2020-10-07 at 09:27 +0300, Leon Romanovsky wrote:
> >
> > This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
> > generates the following KASAN out-of-bound error.
>
> Interesting. I guess that is
>
> 	req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
>
> which basically means that before you never actually *use* the
> ETHTOOL_A_STRSET_COUNTS_ONLY flag, but of course it shouldn't be doing
> this ...
>
> Does this fix it?

Yes, it fixed KASAN, but it we got new failure after that.

11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
netlink error: Unknown attribute type (offset 36)
netlink error: Invalid argument

>
> diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
> index 3f5719786b0f..d8efec516d86 100644
> --- a/net/ethtool/netlink.h
> +++ b/net/ethtool/netlink.h
> @@ -347,7 +347,7 @@ extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
>
>  extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
>  extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
> -extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1];
> +extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_COUNTS_ONLY + 1];
>  extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1];
>  extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1];
>  extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_HEADER + 1];
> diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
> index 0734e83c674c..0baad0ce1832 100644
> --- a/net/ethtool/strset.c
> +++ b/net/ethtool/strset.c
> @@ -103,6 +103,7 @@ const struct nla_policy ethnl_strset_get_policy[] = {
>  	[ETHTOOL_A_STRSET_HEADER]	=
>  		NLA_POLICY_NESTED(ethnl_header_policy),
>  	[ETHTOOL_A_STRSET_STRINGSETS]	= { .type = NLA_NESTED },
> +	[ETHTOOL_A_STRSET_COUNTS_ONLY]	= { .type = NLA_FLAG },
>  };
>
>  static const struct nla_policy get_stringset_policy[] = {
>
> johannes
>

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  8:24         ` Leon Romanovsky
@ 2020-10-07  8:29           ` Johannes Berg
  2020-10-07  8:33             ` Leon Romanovsky
  2020-10-07 10:47             ` Leon Romanovsky
  2020-10-07  8:52           ` Michal Kubecek
  1 sibling, 2 replies; 22+ messages in thread
From: Johannes Berg @ 2020-10-07  8:29 UTC (permalink / raw)
  To: Leon Romanovsky
  Cc: David Miller, kuba, netdev, kernel-team, jiri, andrew, mkubecek,
	Saeed Mahameed

On Wed, 2020-10-07 at 11:24 +0300, Leon Romanovsky wrote:
> On Wed, Oct 07, 2020 at 09:30:51AM +0200, Johannes Berg wrote:
> > On Wed, 2020-10-07 at 09:27 +0300, Leon Romanovsky wrote:
> > > This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
> > > generates the following KASAN out-of-bound error.
> > 
> > Interesting. I guess that is
> > 
> > 	req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
> > 
> > which basically means that before you never actually *use* the
> > ETHTOOL_A_STRSET_COUNTS_ONLY flag, but of course it shouldn't be doing
> > this ...
> > 
> > Does this fix it?
> 
> Yes, it fixed KASAN, but it we got new failure after that.

Good.

I'm not very familiar with ethtool netlink tbh :)

> 11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
> 11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
> netlink error: Unknown attribute type (offset 36)
> netlink error: Invalid argument

That's even stranger, since strict validation should've meant this was
always rejected? Hmm.

Oh, copy/paste error I guess, try this:

diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 8a85a4e6be9b..50d3c8896f91 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -830,8 +830,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_channels,
-		.policy = ethnl_channels_get_policy,
-		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
+		.policy = ethnl_channels_set_policy,
+		.maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
 	},
 	{
 		.cmd	= ETHTOOL_MSG_COALESCE_GET,

johannes


^ permalink raw reply related	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  8:29           ` Johannes Berg
@ 2020-10-07  8:33             ` Leon Romanovsky
  2020-10-07 10:47             ` Leon Romanovsky
  1 sibling, 0 replies; 22+ messages in thread
From: Leon Romanovsky @ 2020-10-07  8:33 UTC (permalink / raw)
  To: Johannes Berg
  Cc: David Miller, kuba, netdev, kernel-team, jiri, andrew, mkubecek,
	Saeed Mahameed

On Wed, Oct 07, 2020 at 10:29:01AM +0200, Johannes Berg wrote:
> On Wed, 2020-10-07 at 11:24 +0300, Leon Romanovsky wrote:
> > On Wed, Oct 07, 2020 at 09:30:51AM +0200, Johannes Berg wrote:
> > > On Wed, 2020-10-07 at 09:27 +0300, Leon Romanovsky wrote:
> > > > This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
> > > > generates the following KASAN out-of-bound error.
> > >
> > > Interesting. I guess that is
> > >
> > > 	req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
> > >
> > > which basically means that before you never actually *use* the
> > > ETHTOOL_A_STRSET_COUNTS_ONLY flag, but of course it shouldn't be doing
> > > this ...
> > >
> > > Does this fix it?
> >
> > Yes, it fixed KASAN, but it we got new failure after that.
>
> Good.
>
> I'm not very familiar with ethtool netlink tbh :)
>
> > 11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
> > 11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
> > netlink error: Unknown attribute type (offset 36)
> > netlink error: Invalid argument
>
> That's even stranger, since strict validation should've meant this was
> always rejected? Hmm.
>
> Oh, copy/paste error I guess, try this:

I'm trying it now and will update in the next hour.

Thanks

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  8:29           ` Johannes Berg
  2020-10-07  8:33             ` Leon Romanovsky
@ 2020-10-07 10:47             ` Leon Romanovsky
  1 sibling, 0 replies; 22+ messages in thread
From: Leon Romanovsky @ 2020-10-07 10:47 UTC (permalink / raw)
  To: Johannes Berg
  Cc: David Miller, kuba, netdev, kernel-team, jiri, andrew, mkubecek,
	Saeed Mahameed

On Wed, Oct 07, 2020 at 10:29:01AM +0200, Johannes Berg wrote:
> On Wed, 2020-10-07 at 11:24 +0300, Leon Romanovsky wrote:
> > On Wed, Oct 07, 2020 at 09:30:51AM +0200, Johannes Berg wrote:
> > > On Wed, 2020-10-07 at 09:27 +0300, Leon Romanovsky wrote:
> > > > This series and my guess that it comes from ff419afa4310 ("ethtool: trim policy tables")
> > > > generates the following KASAN out-of-bound error.
> > >
> > > Interesting. I guess that is
> > >
> > > 	req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
> > >
> > > which basically means that before you never actually *use* the
> > > ETHTOOL_A_STRSET_COUNTS_ONLY flag, but of course it shouldn't be doing
> > > this ...
> > >
> > > Does this fix it?
> >
> > Yes, it fixed KASAN, but it we got new failure after that.
>
> Good.
>
> I'm not very familiar with ethtool netlink tbh :)
>
> > 11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
> > 11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
> > netlink error: Unknown attribute type (offset 36)
> > netlink error: Invalid argument
>
> That's even stranger, since strict validation should've meant this was
> always rejected? Hmm.
>
> Oh, copy/paste error I guess, try this:

Thanks, it fixed and everything passed.



>
> diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
> index 8a85a4e6be9b..50d3c8896f91 100644
> --- a/net/ethtool/netlink.c
> +++ b/net/ethtool/netlink.c
> @@ -830,8 +830,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
>  		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
>  		.flags	= GENL_UNS_ADMIN_PERM,
>  		.doit	= ethnl_set_channels,
> -		.policy = ethnl_channels_get_policy,
> -		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
> +		.policy = ethnl_channels_set_policy,
> +		.maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
>  	},
>  	{
>  		.cmd	= ETHTOOL_MSG_COALESCE_GET,
>
> johannes
>

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  8:24         ` Leon Romanovsky
  2020-10-07  8:29           ` Johannes Berg
@ 2020-10-07  8:52           ` Michal Kubecek
  2020-10-07 10:48             ` Leon Romanovsky
  1 sibling, 1 reply; 22+ messages in thread
From: Michal Kubecek @ 2020-10-07  8:52 UTC (permalink / raw)
  To: Leon Romanovsky
  Cc: Johannes Berg, David Miller, kuba, netdev, kernel-team, jiri,
	andrew, Saeed Mahameed

On Wed, Oct 07, 2020 at 11:24:37AM +0300, Leon Romanovsky wrote:
> Yes, it fixed KASAN, but it we got new failure after that.
> 
> 11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
> 11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
> netlink error: Unknown attribute type (offset 36)
> netlink error: Invalid argument

For the record, when reporting issues like this, it's useful to enable
pretty printing and showing the messages with "--debug 0x12", e.g.

  ethtool --debug 0x12 --setchannels eth2 combined 3

That will show both requests and replies and will also highlight the
offending attribute.

Michal

^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space
  2020-10-07  8:52           ` Michal Kubecek
@ 2020-10-07 10:48             ` Leon Romanovsky
  0 siblings, 0 replies; 22+ messages in thread
From: Leon Romanovsky @ 2020-10-07 10:48 UTC (permalink / raw)
  To: Michal Kubecek
  Cc: Johannes Berg, David Miller, kuba, netdev, kernel-team, jiri,
	andrew, Saeed Mahameed

On Wed, Oct 07, 2020 at 10:52:47AM +0200, Michal Kubecek wrote:
> On Wed, Oct 07, 2020 at 11:24:37AM +0300, Leon Romanovsky wrote:
> > Yes, it fixed KASAN, but it we got new failure after that.
> >
> > 11:07:51 player_id: 1 shell.py:62 [LinuxEthtoolAgent] DEBUG : running command(/opt/mellanox/ethtool/sbin/ethtool --set-channels eth2 combined 3) with pid: 13409
> > 11:07:51 player_id: 1 protocol.py:605 [OpSetChannels] ERROR : RC:1, STDERR:
> > netlink error: Unknown attribute type (offset 36)
> > netlink error: Invalid argument
>
> For the record, when reporting issues like this, it's useful to enable
> pretty printing and showing the messages with "--debug 0x12", e.g.
>
>   ethtool --debug 0x12 --setchannels eth2 combined 3
>
> That will show both requests and replies and will also highlight the
> offending attribute.

Thanks

>
> Michal

^ permalink raw reply	[flat|nested] 22+ messages in thread

end of thread, other threads:[~2020-10-08 15:09 UTC | newest]

Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-05 22:07 [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 1/7] ethtool: wire up get policies to ops Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 2/7] ethtool: wire up set " Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 3/7] ethtool: trim policy tables Jakub Kicinski
2020-10-08  9:12   ` Eric Dumazet
2020-10-08  9:13     ` Johannes Berg
2020-10-08  9:15       ` Johannes Berg
2020-10-08 15:09         ` Eric Dumazet
2020-10-05 22:07 ` [PATCH net-next v2 4/7] ethtool: link up ethnl_header_policy as a nested policy Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 5/7] netlink: create helpers for checking type is an int Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 6/7] netlink: add mask validation Jakub Kicinski
2020-10-05 22:07 ` [PATCH net-next v2 7/7] ethtool: specify which header flags are supported per command Jakub Kicinski
2020-10-06  6:43 ` [PATCH net-next v2 0/7] ethtool: allow dumping policies to user space Johannes Berg
2020-10-06 13:26   ` David Miller
2020-10-07  6:27     ` Leon Romanovsky
2020-10-07  7:30       ` Johannes Berg
2020-10-07  8:24         ` Leon Romanovsky
2020-10-07  8:29           ` Johannes Berg
2020-10-07  8:33             ` Leon Romanovsky
2020-10-07 10:47             ` Leon Romanovsky
2020-10-07  8:52           ` Michal Kubecek
2020-10-07 10:48             ` Leon Romanovsky

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