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| author | Amir Goldstein <amir73il@gmail.com> | 2023-04-27 12:21:46 +0300 |
|---|---|---|
| committer | Amir Goldstein <amir73il@gmail.com> | 2023-06-19 14:01:14 +0300 |
| commit | 2b21da920866ad20b5e3119f3b8d2267774b7b0a (patch) | |
| tree | 93b2c8fd6d67615cabfef1de618ec9bc73343c22 /fs/overlayfs/util.c | |
| parent | 5436ab0a864e8bb263919e51c26395a67bde17ca (diff) | |
| download | linux-2b21da920866ad20b5e3119f3b8d2267774b7b0a.tar.xz | |
ovl: prepare to store lowerdata redirect for lazy lowerdata lookup
Prepare to allow ovl_lookup() to leave the last entry in a non-dir
lowerstack empty to signify lazy lowerdata lookup.
In this case, ovl_lookup() stores the redirect path from metacopy to
lowerdata in ovl_inode, which is going to be used later to perform the
lazy lowerdata lookup.
Signed-off-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 | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index b6e66bf8135f..72f565f640fa 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -226,10 +226,11 @@ void ovl_path_lowerdata(struct dentry *dentry, struct path *path) { struct ovl_entry *oe = OVL_E(dentry); struct ovl_path *lowerdata = ovl_lowerdata(oe); + struct dentry *lowerdata_dentry = ovl_lowerdata_dentry(oe); - if (ovl_numlower(oe)) { + if (lowerdata_dentry) { path->mnt = lowerdata->layer->mnt; - path->dentry = lowerdata->dentry; + path->dentry = lowerdata_dentry; } else { *path = (struct path) { }; } @@ -358,9 +359,15 @@ struct inode *ovl_inode_realdata(struct inode *inode) return ovl_inode_lowerdata(inode); } +const char *ovl_lowerdata_redirect(struct inode *inode) +{ + return inode && S_ISREG(inode->i_mode) ? + OVL_I(inode)->lowerdata_redirect : NULL; +} + struct ovl_dir_cache *ovl_dir_cache(struct inode *inode) { - return OVL_I(inode)->cache; + return inode && S_ISDIR(inode->i_mode) ? OVL_I(inode)->cache : NULL; } void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache) |