diff options
| 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/super.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/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index ab0039161f85..6d22bbd5f27f 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -181,6 +181,7 @@ static struct inode *ovl_alloc_inode(struct super_block *sb) oi->flags = 0; oi->__upperdentry = NULL; oi->lower = NULL; + oi->lowerdata = NULL; mutex_init(&oi->lock); return &oi->vfs_inode; @@ -199,8 +200,11 @@ static void ovl_destroy_inode(struct inode *inode) dput(oi->__upperdentry); iput(oi->lower); + if (S_ISDIR(inode->i_mode)) + ovl_dir_cache_free(inode); + else + iput(oi->lowerdata); kfree(oi->redirect); - ovl_dir_cache_free(inode); mutex_destroy(&oi->lock); call_rcu(&inode->i_rcu, ovl_i_callback); @@ -1487,7 +1491,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) ovl_dentry_set_flag(OVL_E_CONNECTED, root_dentry); ovl_set_upperdata(d_inode(root_dentry)); ovl_inode_init(d_inode(root_dentry), upperpath.dentry, - ovl_dentry_lower(root_dentry)); + ovl_dentry_lower(root_dentry), NULL); sb->s_root = root_dentry; |