[PATCH v3] cifs: dump Security Type info in DebugData

[Kenneth D'souza <kdsouza@redhat.com>]

Currently the end user is unaware with what sec type the
cifs share is mounted if no sec=<type> option is parsed.
With this patch one can easily check from DebugData.

Example:
1) Name: x.x.x.x Uses: 1 Capability: 0x8001f3fc Session Status: 1 Security type: RawNTLMSSP

Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
---
 fs/cifs/cifs_debug.c |  4 ++++
 fs/cifs/cifsglob.h   | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 916567d770f5..9caca784376b 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -375,6 +375,10 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 				ses->ses_count, ses->serverOS, ses->serverNOS,
 				ses->capabilities, ses->status);
 			}
+
+			seq_printf(m,"Security type: %s\n",
+					get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
+
 			if (server->rdma)
 				seq_printf(m, "RDMA\n\t");
 			seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 39b708d9d86d..d8ef01039e71 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -1994,6 +1994,24 @@ extern struct smb_version_values smb302_values;
 extern struct smb_version_operations smb311_operations;
 extern struct smb_version_values smb311_values;
 
+static inline char *get_security_type_str(enum securityEnum sectype)
+{
+       switch (sectype) {
+       case RawNTLMSSP:
+               return "RawNTLMSSP";
+       case Kerberos:
+               return "Kerberos";
+       case NTLMv2:
+               return "NTLMv2";
+       case NTLM:
+               return "NTLM";
+       case LANMAN:
+               return "LANMAN";
+       default:
+               return "Unknown";
+       }
+}
+
 static inline bool is_smb1_server(struct TCP_Server_Info *server)
 {
 	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
-- 
2.21.1