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| author |   Amir Goldstein <amir73il@gmail.com> | 2022-04-04 12:51:47 +0200 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2022-04-28 16:31:11 +0200 |
| commit | 1248ea4b91bcdafefdb025087e67d58382cfc9eb (patch) | |
| tree | b2cdefa0cfc7da672d6e39ce956bea16f0efd8ec /fs/overlayfs/util.c | |
| parent | ovl: pass ofs to setattr operations (diff) | |
| download | linux-dev-1248ea4b91bcdafefdb025087e67d58382cfc9eb.tar.xz linux-dev-1248ea4b91bcdafefdb025087e67d58382cfc9eb.zip | |
ovl: pass layer mnt to ovl_open_realfile()
Ensure that ovl_open_realfile() takes the mount's idmapping into
account. We add a new helper ovl_path_realdata() that can be used to
easily retrieve the relevant path which we can pass down. This is needed
to support idmapped base layers with overlay.
Cc: <linux-unionfs@vger.kernel.org>
Tested-by: Giuseppe Scrivano <gscrivan@redhat.com>
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/util.c')
| -rw-r--r-- | fs/overlayfs/util.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 5a7e5d1e884b..42293610f64e 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -194,6 +194,20 @@ enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path) return type; } +enum ovl_path_type ovl_path_realdata(struct dentry *dentry, struct path *path) +{ + enum ovl_path_type type = ovl_path_type(dentry); + + WARN_ON_ONCE(d_is_dir(dentry)); + + if (!OVL_TYPE_UPPER(type) || OVL_TYPE_MERGE(type)) + ovl_path_lowerdata(dentry, path); + else + ovl_path_upper(dentry, path); + + return type; +} + struct dentry *ovl_dentry_upper(struct dentry *dentry) { return ovl_upperdentry_dereference(OVL_I(d_inode(dentry))); |