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author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 17:49:30 +0200 |
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committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 09:56:09 +0200 |
commit | 4f93b426ab3930952eca6c5c456c2223a3adcbf5 (patch) | |
tree | 17fd2e4590d6c1c2823598cecca0e8700ab2d09b /fs/overlayfs/util.c | |
parent | ovl: Modify ovl_lookup() and friends to lookup metacopy dentry (diff) | |
download | linux-4f93b426ab3930952eca6c5c456c2223a3adcbf5.tar.xz linux-4f93b426ab3930952eca6c5c456c2223a3adcbf5.zip |
ovl: Copy up meta inode data from lowest data inode
So far lower could not be a meta inode. So whenever it was time to copy up
data of a meta inode, we could copy it up from top most lower dentry.
But now lower itself can be a metacopy inode. That means data copy up
needs to take place from a data inode in metacopy inode chain. Find lower
data inode in the chain and use that for data copy up.
Introduced a helper called ovl_path_lowerdata() to find the lower data
inode chain.
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/util.c')
-rw-r--r-- | fs/overlayfs/util.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index ab9a8fae0f99..32ff67fa0bfb 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -164,6 +164,18 @@ void ovl_path_lower(struct dentry *dentry, struct path *path) } } +void ovl_path_lowerdata(struct dentry *dentry, struct path *path) +{ + struct ovl_entry *oe = dentry->d_fsdata; + + if (oe->numlower) { + path->mnt = oe->lowerstack[oe->numlower - 1].layer->mnt; + path->dentry = oe->lowerstack[oe->numlower - 1].dentry; + } else { + *path = (struct path) { }; + } +} + enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path) { enum ovl_path_type type = ovl_path_type(dentry); |