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ovl: clean up getting upper layer

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Merge ovl_get_upper() and ovl_get_upperpath().

The resulting function is named ovl_get_upper(), though it still returns
upperpath as well.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2017-11-10 09:39:15 +01:00
parent 520d7c867f
commit 5064975e7f
1 changed files with 13 additions and 22 deletions
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35
fs/overlayfs/super.c
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@ -831,8 +831,9 @@ static const struct xattr_handler *ovl_xattr_handlers[] = {
NULL
};
static int ovl_get_upperpath(struct ovl_fs *ufs, struct path *upperpath)
static int ovl_get_upper(struct ovl_fs *ufs, struct path *upperpath)
{
struct vfsmount *upper_mnt;
int err;
err = ovl_mount_dir(ufs->config.upperdir, upperpath);
@ -859,6 +860,17 @@ static int ovl_get_upperpath(struct ovl_fs *ufs, struct path *upperpath)
} else {
pr_warn("overlayfs: upperdir is in-use by another mount, accessing files from both mounts will result in undefined behavior.\n");
}
upper_mnt = clone_private_mount(upperpath);
err = PTR_ERR(upper_mnt);
if (IS_ERR(upper_mnt)) {
pr_err("overlayfs: failed to clone upperpath\n");
goto out;
}
/* Don't inherit atime flags */
upper_mnt->mnt_flags &= ~(MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME);
ufs->upper_mnt = upper_mnt;
err = 0;
out:
return err;
@ -954,23 +966,6 @@ out:
return err;
}
static int ovl_get_upper(struct ovl_fs *ufs, struct path *upperpath)
{
struct vfsmount *upper_mnt;
upper_mnt = clone_private_mount(upperpath);
if (IS_ERR(upper_mnt)) {
pr_err("overlayfs: failed to clone upperpath\n");
return PTR_ERR(upper_mnt);
}
/* Don't inherit atime flags */
upper_mnt->mnt_flags &= ~(MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME);
ufs->upper_mnt = upper_mnt;
return 0;
}
static int ovl_get_indexdir(struct ovl_fs *ufs, struct ovl_entry *oe,
struct path *upperpath)
{
@ -1169,10 +1164,6 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
goto out_err;
}
err = ovl_get_upperpath(ufs, &upperpath);
if (err)
goto out_err;
err = ovl_get_upper(ufs, &upperpath);
if (err)
goto out_err;