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-rw-r--r--fs/overlayfs/params.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/overlayfs/params.h b/fs/overlayfs/params.h
new file mode 100644
index 000000000000..8750da68ab2a
--- /dev/null
+++ b/fs/overlayfs/params.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+
+struct ovl_fs;
+struct ovl_config;
+
+extern const struct fs_parameter_spec ovl_parameter_spec[];
+extern const struct constant_table ovl_parameter_redirect_dir[];
+
+/* The set of options that user requested explicitly via mount options */
+struct ovl_opt_set {
+ bool metacopy;
+ bool redirect;
+ bool nfs_export;
+ bool index;
+};
+
+#define OVL_MAX_STACK 500
+
+struct ovl_fs_context_layer {
+ char *name;
+ struct path path;
+};
+
+struct ovl_fs_context {
+ struct path upper;
+ struct path work;
+ size_t capacity;
+ size_t nr; /* includes nr_data */
+ size_t nr_data;
+ struct ovl_opt_set set;
+ struct ovl_fs_context_layer *lower;
+};
+
+int ovl_init_fs_context(struct fs_context *fc);
+void ovl_free_fs(struct ovl_fs *ofs);
+int ovl_fs_params_verify(const struct ovl_fs_context *ctx,
+ struct ovl_config *config);
+int ovl_show_options(struct seq_file *m, struct dentry *dentry);
+const char *ovl_xino_mode(struct ovl_config *config);