diff options
Diffstat (limited to 'fs/overlayfs/ovl_entry.h')
| -rw-r--r-- | fs/overlayfs/ovl_entry.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index bfef6edcc111..e1c838c27a74 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -20,11 +20,18 @@ struct ovl_config { bool nfs_export; }; +struct ovl_sb { + struct super_block *sb; + dev_t pseudo_dev; +}; + struct ovl_layer { struct vfsmount *mnt; - dev_t pseudo_dev; - /* Index of this layer in fs root (upper == 0) */ + struct ovl_sb *fs; + /* Index of this layer in fs root (upper idx == 0) */ int idx; + /* One fsid per unique underlying sb (upper fsid == 0) */ + int fsid; }; struct ovl_path { @@ -35,8 +42,11 @@ struct ovl_path { /* private information held for overlayfs's superblock */ struct ovl_fs { struct vfsmount *upper_mnt; - unsigned numlower; + 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; /* workbasedir is the path at workdir= mount option */ struct dentry *workbasedir; /* workdir is the 'work' directory under workbasedir */ @@ -50,8 +60,6 @@ struct ovl_fs { const struct cred *creator_cred; bool tmpfile; bool noxattr; - /* sb common to all layers */ - struct super_block *same_sb; /* Did we take the inuse lock? */ bool upperdir_locked; bool workdir_locked; |