smb: client: return reparse type in /proc/mounts

[ Upstream commit 1e5f424 ]

Add support for returning reparse mount option in /proc/mounts.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Paulo Alcantara <[email protected]>
Signed-off-by: Steve French <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: Paulo Alcantara

fs/smb/client/cifsfs.c

@@ -674,6 +674,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
 		seq_printf(s, ",backupgid=%u",
 			   from_kgid_munged(&init_user_ns,
 					    cifs_sb->ctx->backupgid));
+	seq_show_option(s, "reparse",
+			cifs_reparse_type_str(cifs_sb->ctx->reparse_type));
 
 	seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize);
 	seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize);

fs/smb/client/cifsglob.h

@@ -159,6 +159,18 @@ enum cifs_reparse_type {
 	CIFS_REPARSE_TYPE_DEFAULT = CIFS_REPARSE_TYPE_NFS,
 };
 
+static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type)
+{
+	switch (type) {
+	case CIFS_REPARSE_TYPE_NFS:
+		return "nfs";
+	case CIFS_REPARSE_TYPE_WSL:
+		return "wsl";
+	default:
+		return "unknown";
+	}
+}
+
 struct session_key {
 	unsigned int len;
 	char *response;