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authorPaolo Abeni <pabeni@redhat.com>2022-11-18 10:46:08 -0800
committerDavid S. Miller <davem@davemloft.net>2022-11-21 13:09:07 +0000
commita3400e8746b626531099e4d9fd8eac41be066683 (patch)
tree5d1f656784dfce69f41bf29cb94beb8b1b578b78 /net
parent976d302fb6165ad620778d7ba834cde6e3fe9f9f (diff)
mptcp: more detailed error reporting on endpoint creation
Endpoint creation can fail for a number of reasons; in case of failure append the error number to the extended ack message, using a newly introduced generic helper. Additionally let mptcp_pm_nl_append_new_local_addr() report different error reasons. Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/mptcp/pm_netlink.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index fdf2ee29f762..d66fbd558263 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -912,10 +912,14 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet,
*/
if (pernet->next_id == MPTCP_PM_MAX_ADDR_ID)
pernet->next_id = 1;
- if (pernet->addrs >= MPTCP_PM_ADDR_MAX)
+ if (pernet->addrs >= MPTCP_PM_ADDR_MAX) {
+ ret = -ERANGE;
goto out;
- if (test_bit(entry->addr.id, pernet->id_bitmap))
+ }
+ if (test_bit(entry->addr.id, pernet->id_bitmap)) {
+ ret = -EBUSY;
goto out;
+ }
/* do not insert duplicate address, differentiate on port only
* singled addresses
@@ -929,8 +933,10 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet,
* endpoint is an implicit one and the user-space
* did not provide an endpoint id
*/
- if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT))
+ if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT)) {
+ ret = -EEXIST;
goto out;
+ }
if (entry->addr.id)
goto out;
@@ -1016,16 +1022,12 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
addrlen = sizeof(struct sockaddr_in6);
#endif
err = kernel_bind(ssock, (struct sockaddr *)&addr, addrlen);
- if (err) {
- pr_warn("kernel_bind error, err=%d", err);
+ if (err)
return err;
- }
err = kernel_listen(ssock, backlog);
- if (err) {
- pr_warn("kernel_listen error, err=%d", err);
+ if (err)
return err;
- }
return 0;
}
@@ -1329,13 +1331,13 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info)
if (entry->addr.port) {
ret = mptcp_pm_nl_create_listen_socket(skb->sk, entry);
if (ret) {
- GENL_SET_ERR_MSG(info, "create listen socket error");
+ GENL_SET_ERR_MSG_FMT(info, "create listen socket error: %d", ret);
goto out_free;
}
}
ret = mptcp_pm_nl_append_new_local_addr(pernet, entry);
if (ret < 0) {
- GENL_SET_ERR_MSG(info, "too many addresses or duplicate one");
+ GENL_SET_ERR_MSG_FMT(info, "too many addresses or duplicate one: %d", ret);
goto out_free;
}