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net: fib_rules: add extack support

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Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
2018-04-21 09:41:31 -07:00
committed by David S. Miller
parent f9d4b0c1e9
commit b16fb418b1
7 changed files with 63 additions and 22 deletions
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55
net/core/fib_rules.c
View File

@@ -469,14 +469,18 @@ static int fib_nl2rule(struct sk_buff *skb, struct nlmsghdr *nlh,
if (frh->src_len)
if (!tb[FRA_SRC] ||
frh->src_len > (ops->addr_size * 8) ||
nla_len(tb[FRA_SRC]) != ops->addr_size)
nla_len(tb[FRA_SRC]) != ops->addr_size) {
NL_SET_ERR_MSG(extack, "Invalid source address");
goto errout;
}
if (frh->dst_len)
if (!tb[FRA_DST] ||
frh->dst_len > (ops->addr_size * 8) ||
nla_len(tb[FRA_DST]) != ops->addr_size)
nla_len(tb[FRA_DST]) != ops->addr_size) {
NL_SET_ERR_MSG(extack, "Invalid dst address");
goto errout;
}
nlrule = kzalloc(ops->rule_size, GFP_KERNEL);
if (!nlrule) {
@@ -537,6 +541,7 @@ static int fib_nl2rule(struct sk_buff *skb, struct nlmsghdr *nlh,
nlrule->l3mdev = nla_get_u8(tb[FRA_L3MDEV]);
if (nlrule->l3mdev != 1)
#endif
NL_SET_ERR_MSG(extack, "Invalid l3mdev");
goto errout_free;
}
@@ -554,31 +559,41 @@ static int fib_nl2rule(struct sk_buff *skb, struct nlmsghdr *nlh,
nlrule->suppress_ifgroup = -1;
if (tb[FRA_GOTO]) {
if (nlrule->action != FR_ACT_GOTO)
if (nlrule->action != FR_ACT_GOTO) {
NL_SET_ERR_MSG(extack, "Unexpected goto");
goto errout_free;
}
nlrule->target = nla_get_u32(tb[FRA_GOTO]);
/* Backward jumps are prohibited to avoid endless loops */
if (nlrule->target <= nlrule->pref)
if (nlrule->target <= nlrule->pref) {
NL_SET_ERR_MSG(extack, "Backward goto not supported");
goto errout_free;
}
} else if (nlrule->action == FR_ACT_GOTO) {
NL_SET_ERR_MSG(extack, "Missing goto target for action goto");
goto errout_free;
}
if (nlrule->l3mdev && nlrule->table)
if (nlrule->l3mdev && nlrule->table) {
NL_SET_ERR_MSG(extack, "l3mdev and table are mutually exclusive");
goto errout_free;
}
if (tb[FRA_UID_RANGE]) {
if (current_user_ns() != net->user_ns) {
err = -EPERM;
NL_SET_ERR_MSG(extack, "No permission to set uid");
goto errout_free;
}
nlrule->uid_range = nla_get_kuid_range(tb);
if (!uid_range_set(&nlrule->uid_range) ||
!uid_lte(nlrule->uid_range.start, nlrule->uid_range.end))
!uid_lte(nlrule->uid_range.start, nlrule->uid_range.end)) {
NL_SET_ERR_MSG(extack, "Invalid uid range");
goto errout_free;
}
} else {
nlrule->uid_range = fib_kuid_range_unset;
}
@@ -589,15 +604,19 @@ static int fib_nl2rule(struct sk_buff *skb, struct nlmsghdr *nlh,
if (tb[FRA_SPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_SPORT_RANGE],
&nlrule->sport_range);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Invalid sport range");
goto errout_free;
}
}
if (tb[FRA_DPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_DPORT_RANGE],
&nlrule->dport_range);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Invalid dport range");
goto errout_free;
}
}
*rule = nlrule;
@@ -621,18 +640,23 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
int err = -EINVAL, unresolved = 0;
bool user_priority = false;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) {
NL_SET_ERR_MSG(extack, "Invalid msg length");
goto errout;
}
ops = lookup_rules_ops(net, frh->family);
if (!ops) {
err = -EAFNOSUPPORT;
NL_SET_ERR_MSG(extack, "Rule family not supported");
goto errout;
}
err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack);
if (err < 0)
if (err < 0) {
NL_SET_ERR_MSG(extack, "Error parsing msg");
goto errout;
}
err = fib_nl2rule(skb, nlh, extack, ops, tb, &rule, &user_priority);
if (err)
@@ -644,7 +668,7 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
goto errout_free;
}
err = ops->configure(rule, skb, frh, tb);
err = ops->configure(rule, skb, frh, tb, extack);
if (err < 0)
goto errout_free;
@@ -723,18 +747,23 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
int err = -EINVAL;
bool user_priority = false;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) {
NL_SET_ERR_MSG(extack, "Invalid msg length");
goto errout;
}
ops = lookup_rules_ops(net, frh->family);
if (ops == NULL) {
err = -EAFNOSUPPORT;
NL_SET_ERR_MSG(extack, "Rule family not supported");
goto errout;
}
err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack);
if (err < 0)
if (err < 0) {
NL_SET_ERR_MSG(extack, "Error parsing msg");
goto errout;
}
err = fib_nl2rule(skb, nlh, extack, ops, tb, &nlrule, &user_priority);
if (err)