[PATCH v4 net-next 0/2] fib: merge nl policies

STALE1759d LANDED

Revision v4 of 2 in this series; landed in mainline as 0f473bb6ed2d on 2021-12-16.

4 messages, 2 authors, 2021-12-16 · open the first message on its own page

[PATCH v4 net-next 0/2] fib: merge nl policies

From: Florian Westphal <fw@strlen.de>
Date: 2021-12-16 12:05:20

v4: resend with fixed subject line.  I preserved review tags
    from David Ahern.
v3: drop first two patches, otherwise unchanged.

This series merges the different (largely identical) nla policies.

v2 also squashed the ->suppress() implementation, I've dropped this.
Problem is that it needs ugly ifdef'ry to avoid build breakage
with CONFIG_INET=n || IPV6=n.

Given that even microbenchmark doesn't show any noticeable improvement
when ->suppress is inlined (it uses INDIRECT_CALLABLE) i decided to toss
the patch instead of adding more ifdefs.

Florian Westphal (2):
  fib: rules: remove duplicated nla policies
  fib: expand fib_rule_policy

 include/net/fib_rules.h | 21 ---------------------
 net/core/fib_rules.c    | 25 +++++++++++++++++++++++--
 net/decnet/dn_rules.c   |  5 -----
 net/ipv4/fib_rules.c    |  6 ------
 net/ipv4/ipmr.c         |  5 -----
 net/ipv6/fib6_rules.c   |  5 -----
 net/ipv6/ip6mr.c        |  5 -----
 7 files changed, 23 insertions(+), 49 deletions(-)

-- 
2.32.0

[PATCH v4 net-next 1/2] fib: rules: remove duplicated nla policies

From: Florian Westphal <fw@strlen.de>
Date: 2021-12-16 12:05:23

The attributes are identical in all implementations so move the ipv4 one
into the core and remove the per-family nla policies.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: David Ahern <dsahern@kernel.org>
---
 resend without changes.

 include/net/fib_rules.h | 1 -
 net/core/fib_rules.c    | 9 +++++++--
 net/decnet/dn_rules.c   | 5 -----
 net/ipv4/fib_rules.c    | 6 ------
 net/ipv4/ipmr.c         | 5 -----
 net/ipv6/fib6_rules.c   | 5 -----
 net/ipv6/ip6mr.c        | 5 -----
 7 files changed, 7 insertions(+), 29 deletions(-)

diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index bd07484ab9dd..4183204915dc 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h

@@ -91,7 +91,6 @@ struct fib_rules_ops {
 	void			(*flush_cache)(struct fib_rules_ops *ops);
 
 	int			nlgroup;
-	const struct nla_policy	*policy;
 	struct list_head	rules_list;
 	struct module		*owner;
 	struct net		*fro_net;

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 1bb567a3b329..f2ae5dcef0bc 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c

@@ -750,6 +750,11 @@ static int rule_exists(struct fib_rules_ops *ops, struct fib_rule_hdr *frh,
 	return 0;
 }
 
+static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
+	FRA_GENERIC_POLICY,
+	[FRA_FLOW]	= { .type = NLA_U32 },
+};
+
 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
 		   struct netlink_ext_ack *extack)
 {

@@ -774,7 +779,7 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
 	}
 
 	err = nlmsg_parse_deprecated(nlh, sizeof(*frh), tb, FRA_MAX,
-				     ops->policy, extack);
+				     fib_rule_policy, extack);
 	if (err < 0) {
 		NL_SET_ERR_MSG(extack, "Error parsing msg");
 		goto errout;

@@ -882,7 +887,7 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
 	}
 
 	err = nlmsg_parse_deprecated(nlh, sizeof(*frh), tb, FRA_MAX,
-				     ops->policy, extack);
+				     fib_rule_policy, extack);
 	if (err < 0) {
 		NL_SET_ERR_MSG(extack, "Error parsing msg");
 		goto errout;

diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c
index 4a4e3c17740c..ee73057529cf 100644
--- a/net/decnet/dn_rules.c
+++ b/net/decnet/dn_rules.c

@@ -101,10 +101,6 @@ static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp,
 	return err;
 }
 
-static const struct nla_policy dn_fib_rule_policy[FRA_MAX+1] = {
-	FRA_GENERIC_POLICY,
-};
-
 static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
 {
 	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;

@@ -235,7 +231,6 @@ static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
 	.fill		= dn_fib_rule_fill,
 	.flush_cache	= dn_fib_rule_flush_cache,
 	.nlgroup	= RTNLGRP_DECnet_RULE,
-	.policy		= dn_fib_rule_policy,
 	.owner		= THIS_MODULE,
 	.fro_net	= &init_net,
 };

diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index d279cb8ac158..e0b6c8b6de57 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c

@@ -216,11 +216,6 @@ static struct fib_table *fib_empty_table(struct net *net)
 	return NULL;
 }
 
-static const struct nla_policy fib4_rule_policy[FRA_MAX+1] = {
-	FRA_GENERIC_POLICY,
-	[FRA_FLOW]	= { .type = NLA_U32 },
-};
-
 static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 			       struct fib_rule_hdr *frh,
 			       struct nlattr **tb,

@@ -386,7 +381,6 @@ static const struct fib_rules_ops __net_initconst fib4_rules_ops_template = {
 	.nlmsg_payload	= fib4_rule_nlmsg_payload,
 	.flush_cache	= fib4_rule_flush_cache,
 	.nlgroup	= RTNLGRP_IPV4_RULE,
-	.policy		= fib4_rule_policy,
 	.owner		= THIS_MODULE,
 };

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 4c7aca884fa9..07274619b9ea 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c

@@ -195,10 +195,6 @@ static int ipmr_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
 	return 1;
 }
 
-static const struct nla_policy ipmr_rule_policy[FRA_MAX + 1] = {
-	FRA_GENERIC_POLICY,
-};
-
 static int ipmr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 			       struct fib_rule_hdr *frh, struct nlattr **tb,
 			       struct netlink_ext_ack *extack)

@@ -231,7 +227,6 @@ static const struct fib_rules_ops __net_initconst ipmr_rules_ops_template = {
 	.compare	= ipmr_rule_compare,
 	.fill		= ipmr_rule_fill,
 	.nlgroup	= RTNLGRP_IPV4_RULE,
-	.policy		= ipmr_rule_policy,
 	.owner		= THIS_MODULE,
 };

diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index dcedfe29d9d9..ec029c86ae06 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c

@@ -340,10 +340,6 @@ INDIRECT_CALLABLE_SCOPE int fib6_rule_match(struct fib_rule *rule,
 	return 1;
 }
 
-static const struct nla_policy fib6_rule_policy[FRA_MAX+1] = {
-	FRA_GENERIC_POLICY,
-};
-
 static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 			       struct fib_rule_hdr *frh,
 			       struct nlattr **tb,

@@ -459,7 +455,6 @@ static const struct fib_rules_ops __net_initconst fib6_rules_ops_template = {
 	.fill			= fib6_rule_fill,
 	.nlmsg_payload		= fib6_rule_nlmsg_payload,
 	.nlgroup		= RTNLGRP_IPV6_RULE,
-	.policy			= fib6_rule_policy,
 	.owner			= THIS_MODULE,
 	.fro_net		= &init_net,
 };

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index a77a15a7f3dc..7cf73e60e619 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c

@@ -182,10 +182,6 @@ static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags)
 	return 1;
 }
 
-static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = {
-	FRA_GENERIC_POLICY,
-};
-
 static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 				struct fib_rule_hdr *frh, struct nlattr **tb,
 				struct netlink_ext_ack *extack)

@@ -218,7 +214,6 @@ static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = {
 	.compare	= ip6mr_rule_compare,
 	.fill		= ip6mr_rule_fill,
 	.nlgroup	= RTNLGRP_IPV6_RULE,
-	.policy		= ip6mr_rule_policy,
 	.owner		= THIS_MODULE,
 };

-- 
2.32.0

[PATCH v4 net-next 2/2] fib: expand fib_rule_policy

From: Florian Westphal <fw@strlen.de>
Date: 2021-12-16 12:05:27

Now that there is only one fib nla_policy there is no need to
keep the macro around.  Place it where its used.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: David Ahern <dsahern@kernel.org>
---
 resend without changes.

 include/net/fib_rules.h | 20 --------------------
 net/core/fib_rules.c    | 18 +++++++++++++++++-
 2 files changed, 17 insertions(+), 21 deletions(-)

diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 4183204915dc..82da359bca03 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h

@@ -102,26 +102,6 @@ struct fib_rule_notifier_info {
 	struct fib_rule *rule;
 };
 
-#define FRA_GENERIC_POLICY \
-	[FRA_UNSPEC]	= { .strict_start_type = FRA_DPORT_RANGE + 1 }, \
-	[FRA_IIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
-	[FRA_OIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
-	[FRA_PRIORITY]	= { .type = NLA_U32 }, \
-	[FRA_FWMARK]	= { .type = NLA_U32 }, \
-	[FRA_TUN_ID]	= { .type = NLA_U64 }, \
-	[FRA_FWMASK]	= { .type = NLA_U32 }, \
-	[FRA_TABLE]     = { .type = NLA_U32 }, \
-	[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
-	[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
-	[FRA_GOTO]	= { .type = NLA_U32 }, \
-	[FRA_L3MDEV]	= { .type = NLA_U8 }, \
-	[FRA_UID_RANGE]	= { .len = sizeof(struct fib_rule_uid_range) }, \
-	[FRA_PROTOCOL]  = { .type = NLA_U8 }, \
-	[FRA_IP_PROTO]  = { .type = NLA_U8 }, \
-	[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }, \
-	[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }
-
-
 static inline void fib_rule_get(struct fib_rule *rule)
 {
 	refcount_inc(&rule->refcnt);

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index f2ae5dcef0bc..75282222e0b4 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c

@@ -751,8 +751,24 @@ static int rule_exists(struct fib_rules_ops *ops, struct fib_rule_hdr *frh,
 }
 
 static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
-	FRA_GENERIC_POLICY,
+	[FRA_UNSPEC]	= { .strict_start_type = FRA_DPORT_RANGE + 1 },
+	[FRA_IIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 },
+	[FRA_OIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 },
+	[FRA_PRIORITY]	= { .type = NLA_U32 },
+	[FRA_FWMARK]	= { .type = NLA_U32 },
 	[FRA_FLOW]	= { .type = NLA_U32 },
+	[FRA_TUN_ID]	= { .type = NLA_U64 },
+	[FRA_FWMASK]	= { .type = NLA_U32 },
+	[FRA_TABLE]     = { .type = NLA_U32 },
+	[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 },
+	[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 },
+	[FRA_GOTO]	= { .type = NLA_U32 },
+	[FRA_L3MDEV]	= { .type = NLA_U8 },
+	[FRA_UID_RANGE]	= { .len = sizeof(struct fib_rule_uid_range) },
+	[FRA_PROTOCOL]  = { .type = NLA_U8 },
+	[FRA_IP_PROTO]  = { .type = NLA_U8 },
+	[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) },
+	[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }
 };
 
 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,

-- 
2.32.0

Re: [PATCH v4 net-next 0/2] fib: merge nl policies

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-12-16 20:14:04

Hello:

This series was applied to netdev/net-next.git (master)
by Jakub Kicinski [off-list ref]:

On Thu, 16 Dec 2021 13:05:05 +0100 you wrote:

v4: resend with fixed subject line.  I preserved review tags
    from David Ahern.
v3: drop first two patches, otherwise unchanged.

This series merges the different (largely identical) nla policies.

v2 also squashed the ->suppress() implementation, I've dropped this.
Problem is that it needs ugly ifdef'ry to avoid build breakage
with CONFIG_INET=n || IPV6=n.

[...]

Here is the summary with links:
  - [v4,net-next,1/2] fib: rules: remove duplicated nla policies
    https://git.kernel.org/netdev/net-next/c/92e1bcee067f
  - [v4,net-next,2/2] fib: expand fib_rule_policy
    https://git.kernel.org/netdev/net-next/c/66495f301c69

You are awesome, thank you!
-- 
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