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| author | Amir Goldstein <amir73il@gmail.com> | 2017-05-24 15:29:33 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2017-05-29 11:48:00 +0200 |
| commit | f3a1568582cc207663a4d5e37da790334372855b (patch) | |
| tree | 00f5b95a4ef417098629a7f16493beb194e5c60c /fs/overlayfs/namei.c | |
| parent | ee1d6d37b6b884383b501089be93ce94f2153028 (diff) | |
| download | linux-f3a1568582cc207663a4d5e37da790334372855b.tar.bz2 | |
ovl: mark upper merge dir with type origin entries "impure"
An upper dir is marked "impure" to let ovl_iterate() know that this
directory may contain non pure upper entries whose d_ino may need to be
read from the origin inode.
We already mark a non-merge dir "impure" when moving a non-pure child
entry inside it, to let ovl_iterate() know not to iterate the non-merge
dir directly.
Mark also a merge dir "impure" when moving a non-pure child entry inside
it and when copying up a child entry inside it.
This can be used to optimize ovl_iterate() to perform a "pure merge" of
upper and lower directories, merging the content of the directories,
without having to read d_ino from origin inodes.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/namei.c')
| -rw-r--r-- | fs/overlayfs/namei.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index 0c72a5909db2..f3136c31e72a 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -167,31 +167,11 @@ invalid: goto out; } -static bool ovl_check_dir_xattr(struct dentry *dentry, const char *name) -{ - int res; - char val; - - if (!d_is_dir(dentry)) - return false; - - res = vfs_getxattr(dentry, name, &val, 1); - if (res == 1 && val == 'y') - return true; - - return false; -} - static bool ovl_is_opaquedir(struct dentry *dentry) { return ovl_check_dir_xattr(dentry, OVL_XATTR_OPAQUE); } -static bool ovl_is_impuredir(struct dentry *dentry) -{ - return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE); -} - static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d, const char *name, unsigned int namelen, size_t prelen, const char *post, |