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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/ovl_entry.h | |
| parent | 5436ab0a864e8bb263919e51c26395a67bde17ca (diff) | |
| download | linux-2b21da920866ad20b5e3119f3b8d2267774b7b0a.tar.gz linux-2b21da920866ad20b5e3119f3b8d2267774b7b0a.tar.bz2 linux-2b21da920866ad20b5e3119f3b8d2267774b7b0a.zip | |
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/ovl_entry.h')
| -rw-r--r-- | fs/overlayfs/ovl_entry.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 93ff299da0dd..513c2c499e41 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -141,6 +141,7 @@ static inline struct ovl_path *ovl_lowerdata(struct ovl_entry *oe) return lowerstack ? &lowerstack[oe->__numlower - 1] : NULL; } +/* May return NULL if lazy lookup of lowerdata is needed */ static inline struct dentry *ovl_lowerdata_dentry(struct ovl_entry *oe) { struct ovl_path *lowerdata = ovl_lowerdata(oe); @@ -157,7 +158,7 @@ static inline unsigned long *OVL_E_FLAGS(struct dentry *dentry) struct ovl_inode { union { struct ovl_dir_cache *cache; /* directory */ - /* place holder for non-dir */ /* regular file */ + const char *lowerdata_redirect; /* regular file */ }; const char *redirect; u64 version; |