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author | 2020-03-17 15:04:22 +0100 | |
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committer | 2020-03-17 15:04:22 +0100 | |
commit | f428884456192230ba1573e4028fb9282ffa2bb7 (patch) | |
tree | bf4c8ad98aaecb0ad80dc6d43f6a10ea005d67be /fs/overlayfs/dir.c | |
parent | ovl: separate detection of remote upper layer from stacked overlay (diff) | |
download | linux-f428884456192230ba1573e4028fb9282ffa2bb7.tar.gz linux-f428884456192230ba1573e4028fb9282ffa2bb7.tar.bz2 linux-f428884456192230ba1573e4028fb9282ffa2bb7.zip |
ovl: decide if revalidate needed on a per-dentry basis
Allow completely skipping ->revalidate() on a per-dentry basis, in case the
underlying layers used for a dentry do not themselves have ->revalidate().
E.g. negative overlay dentry has no underlying layers, hence revalidate is
unnecessary. Or if lower layer is remote but overlay dentry is pure-upper,
then can skip revalidate.
The following places need to update whether the dentry needs revalidate or
not:
- fill-super (root dentry)
- lookup
- create
- fh_to_dentry
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/dir.c')
-rw-r--r-- | fs/overlayfs/dir.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c index 8e57d5372b8f..b3471ef51440 100644 --- a/fs/overlayfs/dir.c +++ b/fs/overlayfs/dir.c @@ -243,6 +243,9 @@ static int ovl_instantiate(struct dentry *dentry, struct inode *inode, ovl_dir_modified(dentry->d_parent, false); ovl_dentry_set_upper_alias(dentry); + ovl_dentry_update_reval(dentry, newdentry, + DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE); + if (!hardlink) { /* * ovl_obtain_alias() can be called after ovl_create_real() |