diff options
Diffstat (limited to 'fs/overlayfs/ovl_entry.h')
| -rw-r--r-- | fs/overlayfs/ovl_entry.h | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 28348c44ea5b..89015ea822e7 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -24,6 +24,8 @@ struct ovl_sb { dev_t pseudo_dev; /* Unusable (conflicting) uuid */ bool bad_uuid; + /* Used as a lower layer (but maybe also as upper) */ + bool is_lower; }; struct ovl_layer { @@ -38,18 +40,18 @@ struct ovl_layer { }; struct ovl_path { - struct ovl_layer *layer; + const struct ovl_layer *layer; struct dentry *dentry; }; /* private information held for overlayfs's superblock */ struct ovl_fs { struct vfsmount *upper_mnt; - unsigned int numlower; - /* Number of unique lower sb that differ from upper sb */ - unsigned int numlowerfs; - struct ovl_layer *lower_layers; - struct ovl_sb *lower_fs; + unsigned int numlayer; + /* Number of unique fs among layers including upper fs */ + unsigned int numfs; + const struct ovl_layer *layers; + struct ovl_sb *fs; /* workbasedir is the path at workdir= mount option */ struct dentry *workbasedir; /* workdir is the 'work' directory under workbasedir */ @@ -71,10 +73,15 @@ struct ovl_fs { struct inode *workbasedir_trap; struct inode *workdir_trap; struct inode *indexdir_trap; - /* Inode numbers in all layers do not use the high xino_bits */ - unsigned int xino_bits; + /* -1: disabled, 0: same fs, 1..32: number of unused ino bits */ + int xino_mode; }; +static inline struct ovl_fs *OVL_FS(struct super_block *sb) +{ + return (struct ovl_fs *)sb->s_fs_info; +} + /* private information held for every overlayfs dentry */ struct ovl_entry { union { |