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devlink: Remove check of always valid devlink pointer

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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@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Leon Romanovsky 2021-08-14 12:57:27 +03:00 • committed by David S. Miller
parent cbf6ab672e
commit 7ca973dc9f
1 changed files with 38 additions and 56 deletions
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94
net/core/devlink.c
View file

@ -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, static int devlink_nl_rate_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_rate *devlink_rate, struct devlink_rate *devlink_rate,
enum devlink_command cmd, u32 portid, enum devlink_command cmd, u32 portid, u32 seq,
u32 seq, int flags, int flags, struct netlink_ext_ack *extack)
struct netlink_ext_ack *extack)
{ {
struct devlink *devlink = devlink_rate->devlink;
void *hdr; void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
@ -959,12 +958,12 @@ out:
return err; 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, struct devlink_port *devlink_port,
enum devlink_command cmd, u32 portid, enum devlink_command cmd, u32 portid, u32 seq,
u32 seq, int flags, int flags, struct netlink_ext_ack *extack)
struct netlink_ext_ack *extack)
{ {
struct devlink *devlink = devlink_port->devlink;
void *hdr; void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
@ -1025,53 +1024,47 @@ nla_put_failure:
static void devlink_port_notify(struct devlink_port *devlink_port, static void devlink_port_notify(struct devlink_port *devlink_port,
enum devlink_command cmd) enum devlink_command cmd)
{ {
struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg; struct sk_buff *msg;
int err; int err;
if (!devlink_port->devlink)
return;
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) if (!msg)
return; return;
err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0, err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
NULL);
if (err) { if (err) {
nlmsg_free(msg); nlmsg_free(msg);
return; return;
} }
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), genlmsg_multicast_netns(&devlink_nl_family,
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); devlink_net(devlink_port->devlink), msg, 0,
DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
} }
static void devlink_rate_notify(struct devlink_rate *devlink_rate, static void devlink_rate_notify(struct devlink_rate *devlink_rate,
enum devlink_command cmd) enum devlink_command cmd)
{ {
struct devlink *devlink = devlink_rate->devlink;
struct sk_buff *msg; struct sk_buff *msg;
int err; int err;
WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL);
cmd != DEVLINK_CMD_RATE_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) if (!msg)
return; return;
err = devlink_nl_rate_fill(msg, devlink, devlink_rate, err = devlink_nl_rate_fill(msg, devlink_rate, cmd, 0, 0, 0, NULL);
cmd, 0, 0, 0, NULL);
if (err) { if (err) {
nlmsg_free(msg); nlmsg_free(msg);
return; return;
} }
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), genlmsg_multicast_netns(&devlink_nl_family,
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); devlink_net(devlink_rate->devlink), msg, 0,
DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
} }
static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg, 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++; idx++;
continue; continue;
} }
err = devlink_nl_rate_fill(msg, devlink, err = devlink_nl_rate_fill(msg, devlink_rate, cmd, id,
devlink_rate,
cmd, id,
cb->nlh->nlmsg_seq, cb->nlh->nlmsg_seq,
NLM_F_MULTI, NULL); NLM_F_MULTI, NULL);
if (err) { if (err) {
@ -1122,7 +1113,6 @@ static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb,
struct genl_info *info) struct genl_info *info)
{ {
struct devlink_rate *devlink_rate = info->user_ptr[1]; struct devlink_rate *devlink_rate = info->user_ptr[1];
struct devlink *devlink = devlink_rate->devlink;
struct sk_buff *msg; struct sk_buff *msg;
int err; int err;
@ -1130,8 +1120,7 @@ static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb,
if (!msg) if (!msg)
return -ENOMEM; return -ENOMEM;
err = devlink_nl_rate_fill(msg, devlink, devlink_rate, err = devlink_nl_rate_fill(msg, devlink_rate, DEVLINK_CMD_RATE_NEW,
DEVLINK_CMD_RATE_NEW,
info->snd_portid, info->snd_seq, 0, info->snd_portid, info->snd_seq, 0,
info->extack); info->extack);
if (err) { if (err) {
@ -1208,7 +1197,6 @@ static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
struct genl_info *info) struct genl_info *info)
{ {
struct devlink_port *devlink_port = info->user_ptr[1]; struct devlink_port *devlink_port = info->user_ptr[1];
struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg; struct sk_buff *msg;
int err; int err;
@ -1216,8 +1204,7 @@ static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
if (!msg) if (!msg)
return -ENOMEM; return -ENOMEM;
err = devlink_nl_port_fill(msg, devlink, devlink_port, err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
DEVLINK_CMD_PORT_NEW,
info->snd_portid, info->snd_seq, 0, info->snd_portid, info->snd_seq, 0,
info->extack); info->extack);
if (err) { if (err) {
@ -1247,12 +1234,11 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
idx++; idx++;
continue; continue;
} }
err = devlink_nl_port_fill(msg, devlink, devlink_port, err = devlink_nl_port_fill(msg, devlink_port,
DEVLINK_CMD_NEW, DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, cb->nlh->nlmsg_seq,
NLM_F_MULTI, NLM_F_MULTI, cb->extack);
cb->extack);
if (err) { if (err) {
mutex_unlock(&devlink->lock); mutex_unlock(&devlink->lock);
goto out; goto out;
@ -1488,9 +1474,8 @@ static int devlink_port_new_notifiy(struct devlink *devlink,
goto out; goto out;
} }
err = devlink_nl_port_fill(msg, devlink, devlink_port, err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
DEVLINK_CMD_NEW, info->snd_portid, info->snd_portid, info->snd_seq, 0, NULL);
info->snd_seq, 0, NULL);
if (err) if (err)
goto out; goto out;
@ -5071,7 +5056,6 @@ static void devlink_nl_region_notify(struct devlink_region *region,
struct devlink_snapshot *snapshot, struct devlink_snapshot *snapshot,
enum devlink_command cmd) enum devlink_command cmd)
{ {
struct devlink *devlink = region->devlink;
struct sk_buff *msg; struct sk_buff *msg;
WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL); 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)) if (IS_ERR(msg))
return; return;
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), genlmsg_multicast_netns(&devlink_nl_family,
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); 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 static int
devlink_nl_health_reporter_fill(struct sk_buff *msg, devlink_nl_health_reporter_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_health_reporter *reporter, struct devlink_health_reporter *reporter,
enum devlink_command cmd, u32 portid, enum devlink_command cmd, u32 portid,
u32 seq, int flags) u32 seq, int flags)
{ {
struct devlink *devlink = reporter->devlink;
struct nlattr *reporter_attr; struct nlattr *reporter_attr;
void *hdr; void *hdr;
@ -6846,8 +6831,7 @@ static void devlink_recover_notify(struct devlink_health_reporter *reporter,
if (!msg) if (!msg)
return; return;
err = devlink_nl_health_reporter_fill(msg, reporter->devlink, err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
reporter, cmd, 0, 0, 0);
if (err) { if (err) {
nlmsg_free(msg); nlmsg_free(msg);
return; return;
@ -7080,7 +7064,7 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
goto out; goto out;
} }
err = devlink_nl_health_reporter_fill(msg, devlink, reporter, err = devlink_nl_health_reporter_fill(msg, reporter,
DEVLINK_CMD_HEALTH_REPORTER_GET, DEVLINK_CMD_HEALTH_REPORTER_GET,
info->snd_portid, info->snd_seq, info->snd_portid, info->snd_seq,
0); 0);
@ -7117,12 +7101,10 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
idx++; idx++;
continue; continue;
} }
err = devlink_nl_health_reporter_fill(msg, devlink, err = devlink_nl_health_reporter_fill(
reporter, msg, reporter, DEVLINK_CMD_HEALTH_REPORTER_GET,
DEVLINK_CMD_HEALTH_REPORTER_GET, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
NETLINK_CB(cb->skb).portid, NLM_F_MULTI);
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) { if (err) {
mutex_unlock(&devlink->reporters_lock); mutex_unlock(&devlink->reporters_lock);
goto out; goto out;
@ -7143,11 +7125,11 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
idx++; idx++;
continue; continue;
} }
err = devlink_nl_health_reporter_fill(msg, devlink, reporter, err = devlink_nl_health_reporter_fill(
DEVLINK_CMD_HEALTH_REPORTER_GET, msg, reporter,
NETLINK_CB(cb->skb).portid, DEVLINK_CMD_HEALTH_REPORTER_GET,
cb->nlh->nlmsg_seq, NETLINK_CB(cb->skb).portid,
NLM_F_MULTI); cb->nlh->nlmsg_seq, NLM_F_MULTI);
if (err) { if (err) {
mutex_unlock(&port->reporters_lock); mutex_unlock(&port->reporters_lock);
mutex_unlock(&devlink->lock); mutex_unlock(&devlink->lock);