From 7b38f6ddc97bf572c3422d3175e8678dd95502fa Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 10 Aug 2023 21:41:03 -0500 Subject: [PATCH] smb3: display network namespace in debug information We recently had problems where a network namespace was deleted causing hard to debug reconnect problems. To help deal with configuration issues like this it is useful to dump the network namespace to better debug what happened. So add this to information displayed in /proc/fs/cifs/DebugData for the server (and channels if mounted with multichannel). For example: Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 Net namespace: 4026531840 This can be easily compared with what is displayed for the processes on the system. For example /proc/1/ns/net in this case showed the same thing (see below), and we can see that the namespace is still valid in this example. 'net:[4026531840]' Cc: stable@vger.kernel.org Acked-by: Paulo Alcantara (SUSE) Signed-off-by: Steve French --- fs/smb/client/cifs_debug.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c index fb4162a52844..aec6e9137474 100644 --- a/fs/smb/client/cifs_debug.c +++ b/fs/smb/client/cifs_debug.c @@ -153,6 +153,11 @@ cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) in_flight(server), atomic_read(&server->in_send), atomic_read(&server->num_waiters)); +#ifdef CONFIG_NET_NS + if (server->net) + seq_printf(m, " Net namespace: %u ", server->net->ns.inum); +#endif /* NET_NS */ + } static inline const char *smb_speed_to_str(size_t bps) @@ -430,10 +435,15 @@ skip_rdma: server->reconnect_instance, server->srv_count, server->sec_mode, in_flight(server)); +#ifdef CONFIG_NET_NS + if (server->net) + seq_printf(m, " Net namespace: %u ", server->net->ns.inum); +#endif /* NET_NS */ seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", atomic_read(&server->in_send), atomic_read(&server->num_waiters)); + if (server->leaf_fullpath) { seq_printf(m, "\nDFS leaf full path: %s", server->leaf_fullpath); -- 2.34.1