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| author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 11:49:31 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 09:56:11 +0200 |
| commit | 4823d49c26eaf269cd2c2723bed8249aaed80795 (patch) | |
| tree | b843d3babb5b0a66a331670298fb0c7569643e11 /fs/overlayfs | |
| parent | 2664bd0897c2889258472a1ee922ef9d4c5fa58f (diff) | |
| download | linux-4823d49c26eaf269cd2c2723bed8249aaed80795.tar.gz linux-4823d49c26eaf269cd2c2723bed8249aaed80795.tar.bz2 linux-4823d49c26eaf269cd2c2723bed8249aaed80795.zip | |
ovl: Add helper ovl_inode_realdata()
Add an helper to retrieve real data inode associated with overlay inode.
This helper will ignore all metacopy inodes and will return only the real
inode which has data.
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')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 1 | ||||
| -rw-r--r-- | fs/overlayfs/util.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 0ad593a85121..99f793904801 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -229,6 +229,7 @@ struct inode *ovl_inode_upper(struct inode *inode); struct inode *ovl_inode_lower(struct inode *inode); struct inode *ovl_inode_lowerdata(struct inode *inode); struct inode *ovl_inode_real(struct inode *inode); +struct inode *ovl_inode_realdata(struct inode *inode); struct ovl_dir_cache *ovl_dir_cache(struct inode *inode); void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache); void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry); diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 63311c536216..73939e08d8bf 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -256,6 +256,18 @@ struct inode *ovl_inode_lowerdata(struct inode *inode) return OVL_I(inode)->lowerdata ?: ovl_inode_lower(inode); } +/* Return real inode which contains data. Does not return metacopy inode */ +struct inode *ovl_inode_realdata(struct inode *inode) +{ + struct inode *upperinode; + + upperinode = ovl_inode_upper(inode); + if (upperinode && ovl_has_upperdata(inode)) + return upperinode; + + return ovl_inode_lowerdata(inode); +} + struct ovl_dir_cache *ovl_dir_cache(struct inode *inode) { return OVL_I(inode)->cache; |