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| author |   Amir Goldstein <amir73il@gmail.com> | 2017-06-21 15:28:36 +0300 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2017-07-04 22:03:17 +0200 |
| commit | 02bcd1577400b0b2eab806ccb9f72d6b5ec7bcca (patch) | |
| tree | 92c54e46aa6ae552eefac194f25d7faccdd00d5c /fs/overlayfs/ovl_entry.h | |
| parent | ovl: generalize ovl_create_workdir() (diff) | |
| download | linux-dev-02bcd1577400b0b2eab806ccb9f72d6b5ec7bcca.tar.xz linux-dev-02bcd1577400b0b2eab806ccb9f72d6b5ec7bcca.zip | |
ovl: introduce the inodes index dir feature
Create the index dir on mount. The index dir will contain hardlinks to
upper inodes, named after the hex representation of their origin lower
inodes.
The index dir is going to be used to prevent breaking lower hardlinks
on copy up and to implement overlayfs NFS export.
Because the feature is not fully backward compat, enabling the feature
is opt-in by config/module/mount option.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/ovl_entry.h')
| -rw-r--r-- | fs/overlayfs/ovl_entry.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 5b5a32116424..9642ec64467b 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -14,6 +14,7 @@ struct ovl_config { char *workdir; bool default_permissions; bool redirect_dir; + bool index; }; /* private information held for overlayfs's superblock */ @@ -25,6 +26,8 @@ struct ovl_fs { struct dentry *workbasedir; /* workdir is the 'work' directory under workbasedir */ struct dentry *workdir; + /* index directory listing overlay inodes by origin file handle */ + struct dentry *indexdir; long namelen; /* pathnames of lower and upper dirs, for show_options */ struct ovl_config config; |