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Message-Id: <434a32266cbd4855fdfb3ea12517523aa9042539.1628933864.git.leonro@nvidia.com>
Date: Sat, 14 Aug 2021 12:57:27 +0300
From: Leon Romanovsky <leon@...nel.org>
To: "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Leon Romanovsky <leonro@...dia.com>,
Guangbin Huang <huangguangbin2@...wei.com>,
Jacob Keller <jacob.e.keller@...el.com>,
Jiri Pirko <jiri@...dia.com>, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, Salil Mehta <salil.mehta@...wei.com>,
Shannon Nelson <snelson@...sando.io>,
Yisen Zhuang <yisen.zhuang@...wei.com>,
Yufeng Mo <moyufeng@...wei.com>
Subject: [PATCH net-next 2/6] devlink: Remove check of always valid devlink pointer
From: Leon Romanovsky <leonro@...dia.com>
Devlink objects are accessible only after they were registered and
have valid devlink_*->devlink pointers.
Remove that check and simplify respective fill functions as an outcome
of such change.
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
net/core/devlink.c | 94 +++++++++++++++++++---------------------------
1 file changed, 38 insertions(+), 56 deletions(-)
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 9e74a95b3322..c8a8eecad1c5 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -832,12 +832,11 @@ static int devlink_port_fn_hw_addr_fill(const struct devlink_ops *ops,
}
static int devlink_nl_rate_fill(struct sk_buff *msg,
- struct devlink *devlink,
struct devlink_rate *devlink_rate,
- enum devlink_command cmd, u32 portid,
- u32 seq, int flags,
- struct netlink_ext_ack *extack)
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags, struct netlink_ext_ack *extack)
{
+ struct devlink *devlink = devlink_rate->devlink;
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
@@ -959,12 +958,12 @@ devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *por
return err;
}
-static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
+static int devlink_nl_port_fill(struct sk_buff *msg,
struct devlink_port *devlink_port,
- enum devlink_command cmd, u32 portid,
- u32 seq, int flags,
- struct netlink_ext_ack *extack)
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags, struct netlink_ext_ack *extack)
{
+ struct devlink *devlink = devlink_port->devlink;
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
@@ -1025,53 +1024,47 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
static void devlink_port_notify(struct devlink_port *devlink_port,
enum devlink_command cmd)
{
- struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg;
int err;
- if (!devlink_port->devlink)
- return;
-
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
- err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0,
- NULL);
+ err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
if (err) {
nlmsg_free(msg);
return;
}
- genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
- msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+ genlmsg_multicast_netns(&devlink_nl_family,
+ devlink_net(devlink_port->devlink), msg, 0,
+ DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static void devlink_rate_notify(struct devlink_rate *devlink_rate,
enum devlink_command cmd)
{
- struct devlink *devlink = devlink_rate->devlink;
struct sk_buff *msg;
int err;
- WARN_ON(cmd != DEVLINK_CMD_RATE_NEW &&
- cmd != DEVLINK_CMD_RATE_DEL);
+ WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
- err = devlink_nl_rate_fill(msg, devlink, devlink_rate,
- cmd, 0, 0, 0, NULL);
+ err = devlink_nl_rate_fill(msg, devlink_rate, cmd, 0, 0, 0, NULL);
if (err) {
nlmsg_free(msg);
return;
}
- genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
- msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+ genlmsg_multicast_netns(&devlink_nl_family,
+ devlink_net(devlink_rate->devlink), msg, 0,
+ DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
@@ -1096,9 +1089,7 @@ static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
idx++;
continue;
}
- err = devlink_nl_rate_fill(msg, devlink,
- devlink_rate,
- cmd, id,
+ err = devlink_nl_rate_fill(msg, devlink_rate, cmd, id,
cb->nlh->nlmsg_seq,
NLM_F_MULTI, NULL);
if (err) {
@@ -1122,7 +1113,6 @@ static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_rate *devlink_rate = info->user_ptr[1];
- struct devlink *devlink = devlink_rate->devlink;
struct sk_buff *msg;
int err;
@@ -1130,8 +1120,7 @@ static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb,
if (!msg)
return -ENOMEM;
- err = devlink_nl_rate_fill(msg, devlink, devlink_rate,
- DEVLINK_CMD_RATE_NEW,
+ err = devlink_nl_rate_fill(msg, devlink_rate, DEVLINK_CMD_RATE_NEW,
info->snd_portid, info->snd_seq, 0,
info->extack);
if (err) {
@@ -1208,7 +1197,6 @@ static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
- struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg;
int err;
@@ -1216,8 +1204,7 @@ static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
if (!msg)
return -ENOMEM;
- err = devlink_nl_port_fill(msg, devlink, devlink_port,
- DEVLINK_CMD_PORT_NEW,
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
info->snd_portid, info->snd_seq, 0,
info->extack);
if (err) {
@@ -1247,12 +1234,11 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
idx++;
continue;
}
- err = devlink_nl_port_fill(msg, devlink, devlink_port,
+ err = devlink_nl_port_fill(msg, devlink_port,
DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
- NLM_F_MULTI,
- cb->extack);
+ NLM_F_MULTI, cb->extack);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
@@ -1488,9 +1474,8 @@ static int devlink_port_new_notifiy(struct devlink *devlink,
goto out;
}
- err = devlink_nl_port_fill(msg, devlink, devlink_port,
- DEVLINK_CMD_NEW, info->snd_portid,
- info->snd_seq, 0, NULL);
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
+ info->snd_portid, info->snd_seq, 0, NULL);
if (err)
goto out;
@@ -5071,7 +5056,6 @@ static void devlink_nl_region_notify(struct devlink_region *region,
struct devlink_snapshot *snapshot,
enum devlink_command cmd)
{
- struct devlink *devlink = region->devlink;
struct sk_buff *msg;
WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
@@ -5080,8 +5064,9 @@ static void devlink_nl_region_notify(struct devlink_region *region,
if (IS_ERR(msg))
return;
- genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
- msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+ genlmsg_multicast_netns(&devlink_nl_family,
+ devlink_net(region->devlink), msg, 0,
+ DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
/**
@@ -6765,11 +6750,11 @@ EXPORT_SYMBOL_GPL(devlink_port_health_reporter_destroy);
static int
devlink_nl_health_reporter_fill(struct sk_buff *msg,
- struct devlink *devlink,
struct devlink_health_reporter *reporter,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
+ struct devlink *devlink = reporter->devlink;
struct nlattr *reporter_attr;
void *hdr;
@@ -6846,8 +6831,7 @@ static void devlink_recover_notify(struct devlink_health_reporter *reporter,
if (!msg)
return;
- err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
- reporter, cmd, 0, 0, 0);
+ err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
@@ -7080,7 +7064,7 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
goto out;
}
- err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
+ err = devlink_nl_health_reporter_fill(msg, reporter,
DEVLINK_CMD_HEALTH_REPORTER_GET,
info->snd_portid, info->snd_seq,
0);
@@ -7117,12 +7101,10 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
idx++;
continue;
}
- err = devlink_nl_health_reporter_fill(msg, devlink,
- reporter,
- DEVLINK_CMD_HEALTH_REPORTER_GET,
- NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq,
- NLM_F_MULTI);
+ err = devlink_nl_health_reporter_fill(
+ msg, reporter, DEVLINK_CMD_HEALTH_REPORTER_GET,
+ NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->reporters_lock);
goto out;
@@ -7143,11 +7125,11 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
idx++;
continue;
}
- err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
- DEVLINK_CMD_HEALTH_REPORTER_GET,
- NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq,
- NLM_F_MULTI);
+ err = devlink_nl_health_reporter_fill(
+ msg, reporter,
+ DEVLINK_CMD_HEALTH_REPORTER_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI);
if (err) {
mutex_unlock(&port->reporters_lock);
mutex_unlock(&devlink->lock);
--
2.31.1
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