cifs: move security mount options into fs_context.ch

This patch moves the parsing of security mount options into
fs_context.ch.  There are no changes to any logic.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index f50dfc2d2e44..dd9da734e346 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -6,3 +6,79 @@
  *              David Howells <dhowells@redhat.com>
  */
 
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "fs_context.h"
+
+static const match_table_t cifs_secflavor_tokens = {
+	{ Opt_sec_krb5, "krb5" },
+	{ Opt_sec_krb5i, "krb5i" },
+	{ Opt_sec_krb5p, "krb5p" },
+	{ Opt_sec_ntlmsspi, "ntlmsspi" },
+	{ Opt_sec_ntlmssp, "ntlmssp" },
+	{ Opt_ntlm, "ntlm" },
+	{ Opt_sec_ntlmi, "ntlmi" },
+	{ Opt_sec_ntlmv2, "nontlm" },
+	{ Opt_sec_ntlmv2, "ntlmv2" },
+	{ Opt_sec_ntlmv2i, "ntlmv2i" },
+	{ Opt_sec_lanman, "lanman" },
+	{ Opt_sec_none, "none" },
+
+	{ Opt_sec_err, NULL }
+};
+
+int cifs_parse_security_flavors(char *value, struct smb_vol *vol)
+{
+
+	substring_t args[MAX_OPT_ARGS];
+
+	/*
+	 * With mount options, the last one should win. Reset any existing
+	 * settings back to default.
+	 */
+	vol->sectype = Unspecified;
+	vol->sign = false;
+
+	switch (match_token(value, cifs_secflavor_tokens, args)) {
+	case Opt_sec_krb5p:
+		cifs_dbg(VFS, "sec=krb5p is not supported!\n");
+		return 1;
+	case Opt_sec_krb5i:
+		vol->sign = true;
+		fallthrough;
+	case Opt_sec_krb5:
+		vol->sectype = Kerberos;
+		break;
+	case Opt_sec_ntlmsspi:
+		vol->sign = true;
+		fallthrough;
+	case Opt_sec_ntlmssp:
+		vol->sectype = RawNTLMSSP;
+		break;
+	case Opt_sec_ntlmi:
+		vol->sign = true;
+		fallthrough;
+	case Opt_ntlm:
+		vol->sectype = NTLM;
+		break;
+	case Opt_sec_ntlmv2i:
+		vol->sign = true;
+		fallthrough;
+	case Opt_sec_ntlmv2:
+		vol->sectype = NTLMv2;
+		break;
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+	case Opt_sec_lanman:
+		vol->sectype = LANMAN;
+		break;
+#endif
+	case Opt_sec_none:
+		vol->nullauth = 1;
+		break;
+	default:
+		cifs_dbg(VFS, "bad security option: %s\n", value);
+		return 1;
+	}
+
+	return 0;
+}