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| author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 18:49:30 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 10:56:11 +0300 |
| commit | 2664bd0897c2889258472a1ee922ef9d4c5fa58f (patch) | |
| tree | 4451f757dc52c00751c3158c24dc1bb004a6bc59 /fs/overlayfs/namei.c | |
| parent | 67d756c27ac4f4576dee313579724bd8711bc75e (diff) | |
| download | linux-2664bd0897c2889258472a1ee922ef9d4c5fa58f.tar.xz | |
ovl: Store lower data inode in ovl_inode
Right now ovl_inode stores inode pointer for lower inode. This helps with
quickly getting lower inode given overlay inode (ovl_inode_lower()).
Now with metadata only copy-up, we can have metacopy inode in middle layer
as well and inode containing data can be different from ->lower. I need to
be able to open the real file in ovl_open_realfile() and for that I need to
quickly find the lower data inode.
Hence store lower data inode also in ovl_inode. Also provide an helper
ovl_inode_lowerdata() to access this field.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/namei.c')
| -rw-r--r-- | fs/overlayfs/namei.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index f562bbb59ddb..85ab856dd134 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -1080,6 +1080,8 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, .index = index, .numlower = ctr, .redirect = upperredirect, + .lowerdata = (ctr > 1 && !d.is_dir) ? + stack[ctr - 1].dentry : NULL, }; inode = ovl_get_inode(dentry->d_sb, &oip); |