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| author |   Christian Brauner <brauner@kernel.org> | 2022-04-04 12:51:49 +0200 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2022-04-28 16:31:11 +0200 |
| commit | 22f289ce1f8b10556617157819a48cf13370f06f (patch) | |
| tree | abe9907afc3334bffd239634d72c2f7816ee3884 /fs/overlayfs/overlayfs.h | |
| parent | ovl: use ovl_do_notify_change() wrapper (diff) | |
| download | linux-dev-22f289ce1f8b10556617157819a48cf13370f06f.tar.xz linux-dev-22f289ce1f8b10556617157819a48cf13370f06f.zip | |
ovl: use ovl_lookup_upper() wrapper
Introduce ovl_lookup_upper() as a simple wrapper around lookup_one().
Make it clear in the helper's name that this only operates on the upper
layer. The wrapper will take upper layer's idmapping into account when
checking permission in lookup_one().
Cc: <linux-unionfs@vger.kernel.org>
Tested-by: Giuseppe Scrivano <gscrivan@redhat.com>
Reviewed-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/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index bc81f279b170..e91f0df914f9 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -7,6 +7,7 @@ #include <linux/kernel.h> #include <linux/uuid.h> #include <linux/fs.h> +#include <linux/namei.h> #include "ovl_entry.h" #undef pr_fmt @@ -310,6 +311,13 @@ static inline struct dentry *ovl_do_tmpfile(struct ovl_fs *ofs, return ret; } +static inline struct dentry *ovl_lookup_upper(struct ovl_fs *ofs, + const char *name, + struct dentry *base, int len) +{ + return lookup_one(ovl_upper_mnt_userns(ofs), name, base, len); +} + static inline bool ovl_open_flags_need_copy_up(int flags) { if (!flags) |