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mptcp: set error messages for set_flags

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In addition to returning the error value, this patch also sets an error
messages with GENL_SET_ERR_MSG or NL_SET_ERR_MSG_ATTR both for pm_netlink.c
and pm_userspace.c. It will help the userspace to identify the issue.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/r/20240305-upstream-net-next-20240304-mptcp-misc-cleanup-v1-3-c436ba5e569b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Geliang Tang 2024-03-05 12:04:32 +01:00 committed by Jakub Kicinski
parent 6a42477fe4
commit a4d68b1602
2 changed files with 12 additions and 3 deletions
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6
net/mptcp/pm_netlink.c
View File

@ -1908,8 +1908,10 @@ int mptcp_pm_nl_set_flags(struct sk_buff *skb, struct genl_info *info)
if (addr.addr.family == AF_UNSPEC) {
lookup_by_id = 1;
if (!addr.addr.id)
if (!addr.addr.id) {
GENL_SET_ERR_MSG(info, "missing required inputs");
return -EOPNOTSUPP;
}
}
if (addr.flags & MPTCP_PM_ADDR_FLAG_BACKUP)
@ -1919,11 +1921,13 @@ int mptcp_pm_nl_set_flags(struct sk_buff *skb, struct genl_info *info)
entry = __lookup_addr(pernet, &addr.addr, lookup_by_id);
if (!entry) {
spin_unlock_bh(&pernet->lock);
GENL_SET_ERR_MSG(info, "address not found");
return -EINVAL;
}
if ((addr.flags & MPTCP_PM_ADDR_FLAG_FULLMESH) &&
(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
spin_unlock_bh(&pernet->lock);
GENL_SET_ERR_MSG(info, "invalid addr flags");
return -EINVAL;
}

9
net/mptcp/pm_userspace.c
View File

@ -563,13 +563,17 @@ int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info)
token_val = nla_get_u32(token);
msk = mptcp_token_get_sock(net, token_val);
if (!msk)
if (!msk) {
NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
return ret;
}
sk = (struct sock *)msk;
if (!mptcp_pm_is_userspace(msk))
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "userspace PM not selected");
goto set_flags_err;
}
ret = mptcp_pm_parse_entry(attr, info, false, &loc);
if (ret < 0)
@ -583,6 +587,7 @@ int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info)
if (loc.addr.family == AF_UNSPEC ||
rem.addr.family == AF_UNSPEC) {
GENL_SET_ERR_MSG(info, "invalid address families");
ret = -EINVAL;
goto set_flags_err;
}