iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mptcp: add new mptcp_fill_diag helper

Browse Source 
Will be re-used from getsockopt path.
Since diag can be a module, we can't export the helper from diag, it
needs to be moved to core.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal
2021-09-17 16:33:18 -07:00
committed by David S. Miller
parent 95dca2d578
commit 61bc6e82f9
3 changed files with 37 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
net/mptcp/sockopt.c
View File

@@ -670,6 +670,38 @@ out:
return ret;
}
void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info)
{
struct sock *sk = &msk->sk.icsk_inet.sk;
bool slow = lock_sock_fast(sk);
u32 flags = 0;
u8 val;
info->mptcpi_subflows = READ_ONCE(msk->pm.subflows);
info->mptcpi_add_addr_signal = READ_ONCE(msk->pm.add_addr_signaled);
info->mptcpi_add_addr_accepted = READ_ONCE(msk->pm.add_addr_accepted);
info->mptcpi_local_addr_used = READ_ONCE(msk->pm.local_addr_used);
info->mptcpi_subflows_max = mptcp_pm_get_subflows_max(msk);
val = mptcp_pm_get_add_addr_signal_max(msk);
info->mptcpi_add_addr_signal_max = val;
val = mptcp_pm_get_add_addr_accept_max(msk);
info->mptcpi_add_addr_accepted_max = val;
info->mptcpi_local_addr_max = mptcp_pm_get_local_addr_max(msk);
if (test_bit(MPTCP_FALLBACK_DONE, &msk->flags))
flags |= MPTCP_INFO_FLAG_FALLBACK;
if (READ_ONCE(msk->can_ack))
flags |= MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED;
info->mptcpi_flags = flags;
info->mptcpi_token = READ_ONCE(msk->token);
info->mptcpi_write_seq = READ_ONCE(msk->write_seq);
info->mptcpi_snd_una = READ_ONCE(msk->snd_una);
info->mptcpi_rcv_nxt = READ_ONCE(msk->ack_seq);
info->mptcpi_csum_enabled = READ_ONCE(msk->csum_enabled);
unlock_sock_fast(sk, slow);
}
EXPORT_SYMBOL_GPL(mptcp_diag_fill_info);
static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname,
char __user *optval, int __user *optlen)
{