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tipc: add extack messages for bearer/media failure
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[ Upstream commit b83e214 ]

Add extack error messages for -EINVAL errors when enabling bearer,
getting/setting properties for a media/bearer

Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@gregkh
Hoang Le authored and gregkh committed Jun 10, 2021
1 parent ca93a7e commit 506285a
Showing 1 changed file with 40 additions and 10 deletions.
50 changes: 40 additions & 10 deletions net/tipc/bearer.c
View file
Expand Up @@ -243,7 +243,8 @@ void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
*/
static int tipc_enable_bearer(struct net *net, const char *name,
u32 disc_domain, u32 prio,
struct nlattr *attr[])
struct nlattr *attr[],
struct netlink_ext_ack *extack)
{
struct tipc_net *tn = tipc_net(net);
struct tipc_bearer_names b_names;
Expand All @@ -257,17 +258,20 @@ static int tipc_enable_bearer(struct net *net, const char *name,

if (!bearer_name_validate(name, &b_names)) {
errstr = "illegal name";
NL_SET_ERR_MSG(extack, "Illegal name");
goto rejected;
}

if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
errstr = "illegal priority";
NL_SET_ERR_MSG(extack, "Illegal priority");
goto rejected;
}

m = tipc_media_find(b_names.media_name);
if (!m) {
errstr = "media not registered";
NL_SET_ERR_MSG(extack, "Media not registered");
goto rejected;
}

Expand All @@ -281,6 +285,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
break;
if (!strcmp(name, b->name)) {
errstr = "already enabled";
NL_SET_ERR_MSG(extack, "Already enabled");
goto rejected;
}
bearer_id++;
Expand All @@ -292,6 +297,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
name, prio);
if (prio == TIPC_MIN_LINK_PRI) {
errstr = "cannot adjust to lower";
NL_SET_ERR_MSG(extack, "Cannot adjust to lower");
goto rejected;
}
pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
Expand All @@ -302,6 +308,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,

if (bearer_id >= MAX_BEARERS) {
errstr = "max 3 bearers permitted";
NL_SET_ERR_MSG(extack, "Max 3 bearers permitted");
goto rejected;
}

Expand All @@ -315,6 +322,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
if (res) {
kfree(b);
errstr = "failed to enable media";
NL_SET_ERR_MSG(extack, "Failed to enable media");
goto rejected;
}

Expand All @@ -331,6 +339,7 @@ static int tipc_enable_bearer(struct net *net, const char *name,
if (res) {
bearer_disable(net, b);
errstr = "failed to create discoverer";
NL_SET_ERR_MSG(extack, "Failed to create discoverer");
goto rejected;
}

Expand Down Expand Up @@ -909,6 +918,7 @@ int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
bearer = tipc_bearer_find(net, name);
if (!bearer) {
err = -EINVAL;
NL_SET_ERR_MSG(info->extack, "Bearer not found");
goto err_out;
}

Expand Down Expand Up @@ -948,8 +958,10 @@ int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);

bearer = tipc_bearer_find(net, name);
if (!bearer)
if (!bearer) {
NL_SET_ERR_MSG(info->extack, "Bearer not found");
return -EINVAL;
}

bearer_disable(net, bearer);

Expand Down Expand Up @@ -1007,7 +1019,8 @@ int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
}

return tipc_enable_bearer(net, bearer, domain, prio, attrs);
return tipc_enable_bearer(net, bearer, domain, prio, attrs,
info->extack);
}

int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
Expand Down Expand Up @@ -1046,6 +1059,7 @@ int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
b = tipc_bearer_find(net, name);
if (!b) {
rtnl_unlock();
NL_SET_ERR_MSG(info->extack, "Bearer not found");
return -EINVAL;
}

Expand Down Expand Up @@ -1086,8 +1100,10 @@ int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);

b = tipc_bearer_find(net, name);
if (!b)
if (!b) {
NL_SET_ERR_MSG(info->extack, "Bearer not found");
return -EINVAL;
}

if (attrs[TIPC_NLA_BEARER_PROP]) {
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
Expand All @@ -1106,12 +1122,18 @@ int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
if (props[TIPC_NLA_PROP_WIN])
b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
if (props[TIPC_NLA_PROP_MTU]) {
if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) {
NL_SET_ERR_MSG(info->extack,
"MTU property is unsupported");
return -EINVAL;
}
#ifdef CONFIG_TIPC_MEDIA_UDP
if (tipc_udp_mtu_bad(nla_get_u32
(props[TIPC_NLA_PROP_MTU])))
(props[TIPC_NLA_PROP_MTU]))) {
NL_SET_ERR_MSG(info->extack,
"MTU value is out-of-range");
return -EINVAL;
}
b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
#endif
Expand Down Expand Up @@ -1239,6 +1261,7 @@ int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
rtnl_lock();
media = tipc_media_find(name);
if (!media) {
NL_SET_ERR_MSG(info->extack, "Media not found");
err = -EINVAL;
goto err_out;
}
Expand Down Expand Up @@ -1275,9 +1298,10 @@ int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);

m = tipc_media_find(name);
if (!m)
if (!m) {
NL_SET_ERR_MSG(info->extack, "Media not found");
return -EINVAL;

}
if (attrs[TIPC_NLA_MEDIA_PROP]) {
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];

Expand All @@ -1293,12 +1317,18 @@ int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
if (props[TIPC_NLA_PROP_WIN])
m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
if (props[TIPC_NLA_PROP_MTU]) {
if (m->type_id != TIPC_MEDIA_TYPE_UDP)
if (m->type_id != TIPC_MEDIA_TYPE_UDP) {
NL_SET_ERR_MSG(info->extack,
"MTU property is unsupported");
return -EINVAL;
}
#ifdef CONFIG_TIPC_MEDIA_UDP
if (tipc_udp_mtu_bad(nla_get_u32
(props[TIPC_NLA_PROP_MTU])))
(props[TIPC_NLA_PROP_MTU]))) {
NL_SET_ERR_MSG(info->extack,
"MTU value is out-of-range");
return -EINVAL;
}
m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
#endif
}
Expand Down

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