#include <linux/fs.h>
#include "ovl_entry.h"
+#undef pr_fmt
+#define pr_fmt(fmt) "overlayfs: " fmt
+
enum ovl_path_type {
__OVL_PATH_UPPER = (1 << 0),
__OVL_PATH_MERGE = (1 << 1),
void ovl_drop_write(struct dentry *dentry);
struct dentry *ovl_workdir(struct dentry *dentry);
const struct cred *ovl_override_creds(struct super_block *sb);
-struct super_block *ovl_same_sb(struct super_block *sb);
int ovl_can_decode_fh(struct super_block *sb);
struct dentry *ovl_indexdir(struct super_block *sb);
bool ovl_index_all(struct super_block *sb);
struct dentry *ovl_dentry_upper(struct dentry *dentry);
struct dentry *ovl_dentry_lower(struct dentry *dentry);
struct dentry *ovl_dentry_lowerdata(struct dentry *dentry);
-struct ovl_layer *ovl_layer_lower(struct dentry *dentry);
+const struct ovl_layer *ovl_layer_lower(struct dentry *dentry);
struct dentry *ovl_dentry_real(struct dentry *dentry);
struct dentry *ovl_i_dentry_upper(struct inode *inode);
struct inode *ovl_inode_upper(struct inode *inode);
return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE);
}
-static inline unsigned int ovl_xino_bits(struct super_block *sb)
+/* All layers on same fs? */
+static inline bool ovl_same_fs(struct super_block *sb)
+{
+ return OVL_FS(sb)->xino_mode == 0;
+}
+
+/* All overlay inodes have same st_dev? */
+static inline bool ovl_same_dev(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ return OVL_FS(sb)->xino_mode >= 0;
+}
- return ofs->xino_bits;
+static inline unsigned int ovl_xino_bits(struct super_block *sb)
+{
+ return ovl_same_dev(sb) ? OVL_FS(sb)->xino_mode : 0;
}
static inline int ovl_inode_lock(struct inode *inode)
/* file.c */
extern const struct file_operations ovl_file_operations;
+int __init ovl_aio_request_cache_init(void);
+void ovl_aio_request_cache_destroy(void);
/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);