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| author | Amir Goldstein <amir73il@gmail.com> | 2023-07-07 11:20:41 +0300 |
|---|---|---|
| committer | Amir Goldstein <amir73il@gmail.com> | 2023-08-12 19:02:50 +0300 |
| commit | d9544c1b0d9e14a66936814dcc8a85861ea1b99f (patch) | |
| tree | b8c8a2f1daee13141cd107888e932902873569d4 /fs/overlayfs/overlayfs.h | |
| parent | b0504bfe1b8acdcfb5ef466581d930835ef3c49e (diff) | |
| download | linux-d9544c1b0d9e14a66936814dcc8a85861ea1b99f.tar.xz | |
ovl: store persistent uuid/fsid with uuid=on
With uuid=on, store a persistent uuid in xattr on the upper dir to
give the overlayfs instance a persistent identifier.
This also makes f_fsid persistent and more reliable for reporting
fid info in fanotify events.
uuid=on is not supported on non-upper overlayfs or with upper fs
that does not support xattrs.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 000dd89fe319..8b026d758eaf 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -37,6 +37,7 @@ enum ovl_xattr { OVL_XATTR_IMPURE, OVL_XATTR_NLINK, OVL_XATTR_UPPER, + OVL_XATTR_UUID, OVL_XATTR_METACOPY, OVL_XATTR_PROTATTR, }; @@ -465,6 +466,8 @@ bool ovl_already_copied_up(struct dentry *dentry, int flags); bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path, enum ovl_xattr ox); bool ovl_path_check_origin_xattr(struct ovl_fs *ofs, const struct path *path); +bool ovl_init_uuid_xattr(struct super_block *sb, struct ovl_fs *ofs, + const struct path *upperpath); static inline bool ovl_check_origin_xattr(struct ovl_fs *ofs, struct dentry *upperdentry) |