diff --git a/.github/workflows/xm530_images.yml b/.github/workflows/xm530_images.yml
index 30210ebe..2c8eb1a9 100644
--- a/.github/workflows/xm530_images.yml
+++ b/.github/workflows/xm530_images.yml
@@ -64,7 +64,9 @@ jobs:
echo "ARCHIVE_FW=$ARCHIVE_FW" >> $GITHUB_ENV
cd $GITHUB_WORKSPACE
make BOARD=unknown_unknown_xm530_openipc all
- tar -C ${GITHUB_WORKSPACE}/output/images -cvzf $ARCHIVE_FW rootfs.squashfs uImage
+ mv ${GITHUB_WORKSPACE}/output/images/uImage ${GITHUB_WORKSPACE}/output/images/uImage_xm530
+ mv ${GITHUB_WORKSPACE}/output/images/rootfs.squashfs ${GITHUB_WORKSPACE}/output/images/rootfs.squashfs_xm530
+ tar -C ${GITHUB_WORKSPACE}/output/images -cvzf $ARCHIVE_FW rootfs.squashfs_xm530 uImage_xm530
- name: Build XM530 SDK
id: build-xm530-sdk
diff --git a/Makefile b/Makefile
index c093b2bd..ff928c77 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@
ROOT_DIR := $(CURDIR)
BR_VER := 2020.02
BR_DIR := $(ROOT_DIR)/buildroot-$(BR_VER)
-BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-hisilicon
-#BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-xiongmai
+#BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-hisilicon
+BR_EXT_DIR := $(ROOT_DIR)/br-ext-chip-xiongmai
SCRIPTS_DIR := $(ROOT_DIR)/scripts
BOARDS := $(shell ls -1 $(BR_EXT_DIR)/configs)
diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch b/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch
new file mode 100644
index 00000000..c491b736
--- /dev/null
+++ b/br-ext-chip-xiongmai/board/xm530/kernel/patches/xm530_overlayfs.v18-3.10-rc7.patch
@@ -0,0 +1,3285 @@
+diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
+index 0706d32..4331290 100644
+--- a/Documentation/filesystems/Locking
++++ b/Documentation/filesystems/Locking
+@@ -66,6 +66,7 @@ prototypes:
+ int (*atomic_open)(struct inode *, struct dentry *,
+ struct file *, unsigned open_flag,
+ umode_t create_mode, int *opened);
++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
+
+ locking rules:
+ all may block
+@@ -93,6 +94,7 @@ removexattr: yes
+ fiemap: no
+ update_time: no
+ atomic_open: yes
++dentry_open: no
+
+ Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
+ victim.
+diff --git a/Documentation/filesystems/overlayfs.txt b/Documentation/filesystems/overlayfs.txt
+new file mode 100644
+index 0000000..00dbab0
+--- /dev/null
++++ b/Documentation/filesystems/overlayfs.txt
+@@ -0,0 +1,199 @@
++Written by: Neil Brown <neilb@suse.de>
++
++Overlay Filesystem
++==================
++
++This document describes a prototype for a new approach to providing
++overlay-filesystem functionality in Linux (sometimes referred to as
++union-filesystems). An overlay-filesystem tries to present a
++filesystem which is the result over overlaying one filesystem on top
++of the other.
++
++The result will inevitably fail to look exactly like a normal
++filesystem for various technical reasons. The expectation is that
++many use cases will be able to ignore these differences.
++
++This approach is 'hybrid' because the objects that appear in the
++filesystem do not all appear to belong to that filesystem. In many
++cases an object accessed in the union will be indistinguishable
++from accessing the corresponding object from the original filesystem.
++This is most obvious from the 'st_dev' field returned by stat(2).
++
++While directories will report an st_dev from the overlay-filesystem,
++all non-directory objects will report an st_dev from the lower or
++upper filesystem that is providing the object. Similarly st_ino will
++only be unique when combined with st_dev, and both of these can change
++over the lifetime of a non-directory object. Many applications and
++tools ignore these values and will not be affected.
++
++Upper and Lower
++---------------
++
++An overlay filesystem combines two filesystems - an 'upper' filesystem
++and a 'lower' filesystem. When a name exists in both filesystems, the
++object in the 'upper' filesystem is visible while the object in the
++'lower' filesystem is either hidden or, in the case of directories,
++merged with the 'upper' object.
++
++It would be more correct to refer to an upper and lower 'directory
++tree' rather than 'filesystem' as it is quite possible for both
++directory trees to be in the same filesystem and there is no
++requirement that the root of a filesystem be given for either upper or
++lower.
++
++The lower filesystem can be any filesystem supported by Linux and does
++not need to be writable. The lower filesystem can even be another
++overlayfs. The upper filesystem will normally be writable and if it
++is it must support the creation of trusted.* extended attributes, and
++must provide valid d_type in readdir responses, at least for symbolic
++links - so NFS is not suitable.
++
++A read-only overlay of two read-only filesystems may use any
++filesystem type.
++
++Directories
++-----------
++
++Overlaying mainly involves directories. If a given name appears in both
++upper and lower filesystems and refers to a non-directory in either,
++then the lower object is hidden - the name refers only to the upper
++object.
++
++Where both upper and lower objects are directories, a merged directory
++is formed.
++
++At mount time, the two directories given as mount options are combined
++into a merged directory:
++
++ mount -t overlayfs overlayfs -olowerdir=/lower,upperdir=/upper /overlay
++
++Then whenever a lookup is requested in such a merged directory, the
++lookup is performed in each actual directory and the combined result
++is cached in the dentry belonging to the overlay filesystem. If both
++actual lookups find directories, both are stored and a merged
++directory is created, otherwise only one is stored: the upper if it
++exists, else the lower.
++
++Only the lists of names from directories are merged. Other content
++such as metadata and extended attributes are reported for the upper
++directory only. These attributes of the lower directory are hidden.
++
++whiteouts and opaque directories
++--------------------------------
++
++In order to support rm and rmdir without changing the lower
++filesystem, an overlay filesystem needs to record in the upper filesystem
++that files have been removed. This is done using whiteouts and opaque
++directories (non-directories are always opaque).
++
++The overlay filesystem uses extended attributes with a
++"trusted.overlay." prefix to record these details.
++
++A whiteout is created as a symbolic link with target
++"(overlay-whiteout)" and with xattr "trusted.overlay.whiteout" set to "y".
++When a whiteout is found in the upper level of a merged directory, any
++matching name in the lower level is ignored, and the whiteout itself
++is also hidden.
++
++A directory is made opaque by setting the xattr "trusted.overlay.opaque"
++to "y". Where the upper filesystem contains an opaque directory, any
++directory in the lower filesystem with the same name is ignored.
++
++readdir
++-------
++
++When a 'readdir' request is made on a merged directory, the upper and
++lower directories are each read and the name lists merged in the
++obvious way (upper is read first, then lower - entries that already
++exist are not re-added). This merged name list is cached in the
++'struct file' and so remains as long as the file is kept open. If the
++directory is opened and read by two processes at the same time, they
++will each have separate caches. A seekdir to the start of the
++directory (offset 0) followed by a readdir will cause the cache to be
++discarded and rebuilt.
++
++This means that changes to the merged directory do not appear while a
++directory is being read. This is unlikely to be noticed by many
++programs.
++
++seek offsets are assigned sequentially when the directories are read.
++Thus if
++ - read part of a directory
++ - remember an offset, and close the directory
++ - re-open the directory some time later
++ - seek to the remembered offset
++
++there may be little correlation between the old and new locations in
++the list of filenames, particularly if anything has changed in the
++directory.
++
++Readdir on directories that are not merged is simply handled by the
++underlying directory (upper or lower).
++
++
++Non-directories
++---------------
++
++Objects that are not directories (files, symlinks, device-special
++files etc.) are presented either from the upper or lower filesystem as
++appropriate. When a file in the lower filesystem is accessed in a way
++the requires write-access, such as opening for write access, changing
++some metadata etc., the file is first copied from the lower filesystem
++to the upper filesystem (copy_up). Note that creating a hard-link
++also requires copy_up, though of course creation of a symlink does
++not.
++
++The copy_up may turn out to be unnecessary, for example if the file is
++opened for read-write but the data is not modified.
++
++The copy_up process first makes sure that the containing directory
++exists in the upper filesystem - creating it and any parents as
++necessary. It then creates the object with the same metadata (owner,
++mode, mtime, symlink-target etc.) and then if the object is a file, the
++data is copied from the lower to the upper filesystem. Finally any
++extended attributes are copied up.
++
++Once the copy_up is complete, the overlay filesystem simply
++provides direct access to the newly created file in the upper
++filesystem - future operations on the file are barely noticed by the
++overlay filesystem (though an operation on the name of the file such as
++rename or unlink will of course be noticed and handled).
++
++
++Non-standard behavior
++---------------------
++
++The copy_up operation essentially creates a new, identical file and
++moves it over to the old name. The new file may be on a different
++filesystem, so both st_dev and st_ino of the file may change.
++
++Any open files referring to this inode will access the old data and
++metadata. Similarly any file locks obtained before copy_up will not
++apply to the copied up file.
++
++On a file opened with O_RDONLY fchmod(2), fchown(2), futimesat(2) and
++fsetxattr(2) will fail with EROFS.
++
++If a file with multiple hard links is copied up, then this will
++"break" the link. Changes will not be propagated to other names
++referring to the same inode.
++
++Symlinks in /proc/PID/ and /proc/PID/fd which point to a non-directory
++object in overlayfs will not contain valid absolute paths, only
++relative paths leading up to the filesystem's root. This will be
++fixed in the future.
++
++Some operations are not atomic, for example a crash during copy_up or
++rename will leave the filesystem in an inconsistent state. This will
++be addressed in the future.
++
++Changes to underlying filesystems
++---------------------------------
++
++Offline changes, when the overlay is not mounted, are allowed to either
++the upper or the lower trees.
++
++Changes to the underlying filesystems while part of a mounted overlay
++filesystem are not allowed. If the underlying filesystem is changed,
++the behavior of the overlay is undefined, though it will not result in
++a crash or deadlock.
+diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
+index bc4b06b..f64a4d1 100644
+--- a/Documentation/filesystems/vfs.txt
++++ b/Documentation/filesystems/vfs.txt
+@@ -362,6 +362,7 @@ struct inode_operations {
+ int (*atomic_open)(struct inode *, struct dentry *,
+ struct file *, unsigned open_flag,
+ umode_t create_mode, int *opened);
++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
+ };
+
+ Again, all methods are called without any locks being held, unless
+@@ -681,6 +682,12 @@ struct address_space_operations {
+ but instead uses bmap to find out where the blocks in the file
+ are and uses those addresses directly.
+
++ dentry_open: this is an alternative to f_op->open(), the difference is that
++ this method may open a file not necessarily originating from the same
++ filesystem as the one i_op->open() was called on. It may be
++ useful for stacking filesystems which want to allow native I/O directly
++ on underlying files.
++
+
+ invalidatepage: If a page has PagePrivate set, then invalidatepage
+ will be called when part or all of the page is to be removed
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 5be702c..8911997 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -6019,6 +6019,13 @@ F: drivers/scsi/osd/
+ F: include/scsi/osd_*
+ F: fs/exofs/
+
++OVERLAYFS FILESYSTEM
++M: Miklos Szeredi <miklos@szeredi.hu>
++L: linux-fsdevel@vger.kernel.org
++S: Supported
++F: fs/overlayfs/*
++F: Documentation/filesystems/overlayfs.txt
++
+ P54 WIRELESS DRIVER
+ M: Christian Lamparter <chunkeey@googlemail.com>
+ L: linux-wireless@vger.kernel.org
+diff --git a/fs/Kconfig b/fs/Kconfig
+index c229f82..60291d5 100644
+--- a/fs/Kconfig
++++ b/fs/Kconfig
+@@ -67,6 +67,7 @@ source "fs/quota/Kconfig"
+
+ source "fs/autofs4/Kconfig"
+ source "fs/fuse/Kconfig"
++source "fs/overlayfs/Kconfig"
+
+ config GENERIC_ACL
+ bool
+diff --git a/fs/Makefile b/fs/Makefile
+index 4fe6df3..9506dd7 100644
+--- a/fs/Makefile
++++ b/fs/Makefile
+@@ -105,6 +105,7 @@ obj-$(CONFIG_QNX6FS_FS) += qnx6/
+ obj-$(CONFIG_AUTOFS4_FS) += autofs4/
+ obj-$(CONFIG_ADFS_FS) += adfs/
+ obj-$(CONFIG_FUSE_FS) += fuse/
++obj-$(CONFIG_OVERLAYFS_FS) += overlayfs/
+ obj-$(CONFIG_UDF_FS) += udf/
+ obj-$(CONFIG_SUN_OPENPROMFS) += openpromfs/
+ obj-$(CONFIG_OMFS_FS) += omfs/
+diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
+index e924cf4..8b0957e 100644
+--- a/fs/ecryptfs/main.c
++++ b/fs/ecryptfs/main.c
+@@ -567,6 +567,13 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
+ s->s_maxbytes = path.dentry->d_sb->s_maxbytes;
+ s->s_blocksize = path.dentry->d_sb->s_blocksize;
+ s->s_magic = ECRYPTFS_SUPER_MAGIC;
++ s->s_stack_depth = path.dentry->d_sb->s_stack_depth + 1;
++
++ rc = -EINVAL;
++ if (s->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) {
++ pr_err("eCryptfs: maximum fs stacking depth exceeded\n");
++ goto out_free;
++ }
+
+ inode = ecryptfs_get_inode(path.dentry->d_inode, s);
+ rc = PTR_ERR(inode);
+diff --git a/fs/internal.h b/fs/internal.h
+index 6812158..6c9ec69 100644
+--- a/fs/internal.h
++++ b/fs/internal.h
+@@ -42,11 +42,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
+ extern void __init chrdev_init(void);
+
+ /*
+- * namei.c
+- */
+-extern int __inode_permission(struct inode *, int);
+-
+-/*
+ * namespace.c
+ */
+ extern int copy_mount_options(const void __user *, unsigned long *);
+@@ -132,12 +127,6 @@ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
+ extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
+
+ /*
+- * splice.c
+- */
+-extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
+- loff_t *opos, size_t len, unsigned int flags);
+-
+-/*
+ * pipe.c
+ */
+ extern const struct file_operations pipefifo_fops;
+diff --git a/fs/namei.c b/fs/namei.c
+index 9ed9361..df058f5 100644
+--- a/fs/namei.c
++++ b/fs/namei.c
+@@ -402,6 +402,7 @@ int __inode_permission(struct inode *inode, int mask)
+
+ return security_inode_permission(inode, mask);
+ }
++EXPORT_SYMBOL(__inode_permission);
+
+ /**
+ * sb_permission - Check superblock-level permissions
+@@ -2867,9 +2868,12 @@ finish_open_created:
+ error = may_open(&nd->path, acc_mode, open_flag);
+ if (error)
+ goto out;
+- file->f_path.mnt = nd->path.mnt;
+- error = finish_open(file, nd->path.dentry, NULL, opened);
+- if (error) {
++
++ BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
++ error = vfs_open(&nd->path, file, current_cred());
++ if (!error) {
++ *opened |= FILE_OPENED;
++ } else {
+ if (error == -EOPENSTALE)
+ goto stale_open;
+ goto out;
+diff --git a/fs/namespace.c b/fs/namespace.c
+index 7b1ca9b..455e6ea 100644
+--- a/fs/namespace.c
++++ b/fs/namespace.c
+@@ -1442,6 +1442,33 @@ void drop_collected_mounts(struct vfsmount *mnt)
+ namespace_unlock();
+ }
+
++/**
++ * clone_private_mount - create a private clone of a path
++ *
++ * This creates a new vfsmount, which will be the clone of @path. The new will
++ * not be attached anywhere in the namespace and will be private (i.e. changes
++ * to the originating mount won't be propagated into this).
++ *
++ * Release with mntput().
++ */
++struct vfsmount *clone_private_mount(struct path *path)
++{
++ struct mount *old_mnt = real_mount(path->mnt);
++ struct mount *new_mnt;
++
++ if (IS_MNT_UNBINDABLE(old_mnt))
++ return ERR_PTR(-EINVAL);
++
++ down_read(&namespace_sem);
++ new_mnt = clone_mnt(old_mnt, path->dentry, CL_PRIVATE);
++ up_read(&namespace_sem);
++ if (IS_ERR(new_mnt))
++ return ERR_CAST(new_mnt);
++
++ return &new_mnt->mnt;
++}
++EXPORT_SYMBOL_GPL(clone_private_mount);
++
+ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+ struct vfsmount *root)
+ {
+diff --git a/fs/open.c b/fs/open.c
+index 8c74100..ab07bc9 100644
+--- a/fs/open.c
++++ b/fs/open.c
+@@ -800,8 +800,7 @@ struct file *dentry_open(const struct path *path, int flags,
+ f = get_empty_filp();
+ if (!IS_ERR(f)) {
+ f->f_flags = flags;
+- f->f_path = *path;
+- error = do_dentry_open(f, NULL, cred);
++ error = vfs_open(path, f, cred);
+ if (!error) {
+ /* from now on we need fput() to dispose of f */
+ error = open_check_o_direct(f);
+@@ -818,6 +817,26 @@ struct file *dentry_open(const struct path *path, int flags,
+ }
+ EXPORT_SYMBOL(dentry_open);
+
++/**
++ * vfs_open - open the file at the given path
++ * @path: path to open
++ * @filp: newly allocated file with f_flag initialized
++ * @cred: credentials to use
++ */
++int vfs_open(const struct path *path, struct file *filp,
++ const struct cred *cred)
++{
++ struct inode *inode = path->dentry->d_inode;
++
++ if (inode->i_op->dentry_open)
++ return inode->i_op->dentry_open(path->dentry, filp, cred);
++ else {
++ filp->f_path = *path;
++ return do_dentry_open(filp, NULL, cred);
++ }
++}
++EXPORT_SYMBOL(vfs_open);
++
+ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *op)
+ {
+ int lookup_flags = 0;
+diff --git a/fs/overlayfs/Kconfig b/fs/overlayfs/Kconfig
+new file mode 100644
+index 0000000..e601259
+--- /dev/null
++++ b/fs/overlayfs/Kconfig
+@@ -0,0 +1,10 @@
++config OVERLAYFS_FS
++ tristate "Overlay filesystem support"
++ help
++ An overlay filesystem combines two filesystems - an 'upper' filesystem
++ and a 'lower' filesystem. When a name exists in both filesystems, the
++ object in the 'upper' filesystem is visible while the object in the
++ 'lower' filesystem is either hidden or, in the case of directories,
++ merged with the 'upper' object.
++
++ For more information see Documentation/filesystems/overlayfs.txt
+diff --git a/fs/overlayfs/Makefile b/fs/overlayfs/Makefile
+new file mode 100644
+index 0000000..8f91889
+--- /dev/null
++++ b/fs/overlayfs/Makefile
+@@ -0,0 +1,7 @@
++#
++# Makefile for the overlay filesystem.
++#
++
++obj-$(CONFIG_OVERLAYFS_FS) += overlayfs.o
++
++overlayfs-objs := super.o inode.o dir.o readdir.o copy_up.o
+diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
+new file mode 100644
+index 0000000..7b9fb6d
+--- /dev/null
++++ b/fs/overlayfs/copy_up.c
+@@ -0,0 +1,387 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++#include <linux/fs.h>
++#include <linux/slab.h>
++#include <linux/file.h>
++#include <linux/splice.h>
++#include <linux/xattr.h>
++#include <linux/security.h>
++#include <linux/uaccess.h>
++#include <linux/sched.h>
++#include "overlayfs.h"
++
++#define OVL_COPY_UP_CHUNK_SIZE (1 << 20)
++
++static int ovl_copy_up_xattr(struct dentry *old, struct dentry *new)
++{
++ ssize_t list_size, size;
++ char *buf, *name, *value;
++ int error;
++
++ if (!old->d_inode->i_op->getxattr ||
++ !new->d_inode->i_op->getxattr)
++ return 0;
++
++ list_size = vfs_listxattr(old, NULL, 0);
++ if (list_size <= 0) {
++ if (list_size == -EOPNOTSUPP)
++ return 0;
++ return list_size;
++ }
++
++ buf = kzalloc(list_size, GFP_KERNEL);
++ if (!buf)
++ return -ENOMEM;
++
++ error = -ENOMEM;
++ value = kmalloc(XATTR_SIZE_MAX, GFP_KERNEL);
++ if (!value)
++ goto out;
++
++ list_size = vfs_listxattr(old, buf, list_size);
++ if (list_size <= 0) {
++ error = list_size;
++ goto out_free_value;
++ }
++
++ for (name = buf; name < (buf + list_size); name += strlen(name) + 1) {
++ size = vfs_getxattr(old, name, value, XATTR_SIZE_MAX);
++ if (size <= 0) {
++ error = size;
++ goto out_free_value;
++ }
++ error = vfs_setxattr(new, name, value, size, 0);
++ if (error)
++ goto out_free_value;
++ }
++
++out_free_value:
++ kfree(value);
++out:
++ kfree(buf);
++ return error;
++}
++
++static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len)
++{
++ struct file *old_file;
++ struct file *new_file;
++ loff_t old_pos = 0;
++ loff_t new_pos = 0;
++ int error = 0;
++
++ if (len == 0)
++ return 0;
++
++ old_file = ovl_path_open(old, O_RDONLY);
++ if (IS_ERR(old_file))
++ return PTR_ERR(old_file);
++
++ new_file = ovl_path_open(new, O_WRONLY);
++ if (IS_ERR(new_file)) {
++ error = PTR_ERR(new_file);
++ goto out_fput;
++ }
++
++ /* FIXME: copy up sparse files efficiently */
++ while (len) {
++ size_t this_len = OVL_COPY_UP_CHUNK_SIZE;
++ long bytes;
++
++ if (len < this_len)
++ this_len = len;
++
++ if (signal_pending_state(TASK_KILLABLE, current)) {
++ error = -EINTR;
++ break;
++ }
++
++ bytes = do_splice_direct(old_file, &old_pos,
++ new_file, &new_pos,
++ this_len, SPLICE_F_MOVE);
++ if (bytes <= 0) {
++ error = bytes;
++ break;
++ }
++
++ len -= bytes;
++ }
++
++ fput(new_file);
++out_fput:
++ fput(old_file);
++ return error;
++}
++
++static char *ovl_read_symlink(struct dentry *realdentry)
++{
++ int res;
++ char *buf;
++ struct inode *inode = realdentry->d_inode;
++ mm_segment_t old_fs;
++
++ res = -EINVAL;
++ if (!inode->i_op->readlink)
++ goto err;
++
++ res = -ENOMEM;
++ buf = (char *) __get_free_page(GFP_KERNEL);
++ if (!buf)
++ goto err;
++
++ old_fs = get_fs();
++ set_fs(get_ds());
++ /* The cast to a user pointer is valid due to the set_fs() */
++ res = inode->i_op->readlink(realdentry,
++ (char __user *)buf, PAGE_SIZE - 1);
++ set_fs(old_fs);
++ if (res < 0) {
++ free_page((unsigned long) buf);
++ goto err;
++ }
++ buf[res] = '\0';
++
++ return buf;
++
++err:
++ return ERR_PTR(res);
++}
++
++static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat)
++{
++ struct iattr attr = {
++ .ia_valid =
++ ATTR_ATIME | ATTR_MTIME | ATTR_ATIME_SET | ATTR_MTIME_SET,
++ .ia_atime = stat->atime,
++ .ia_mtime = stat->mtime,
++ };
++
++ return notify_change(upperdentry, &attr);
++}
++
++static int ovl_set_mode(struct dentry *upperdentry, umode_t mode)
++{
++ struct iattr attr = {
++ .ia_valid = ATTR_MODE,
++ .ia_mode = mode,
++ };
++
++ return notify_change(upperdentry, &attr);
++}
++
++static int ovl_copy_up_locked(struct dentry *upperdir, struct dentry *dentry,
++ struct path *lowerpath, struct kstat *stat,
++ const char *link)
++{
++ int err;
++ struct path newpath;
++ umode_t mode = stat->mode;
++
++ /* Can't properly set mode on creation because of the umask */
++ stat->mode &= S_IFMT;
++
++ ovl_path_upper(dentry, &newpath);
++ WARN_ON(newpath.dentry);
++ newpath.dentry = ovl_upper_create(upperdir, dentry, stat, link);
++ if (IS_ERR(newpath.dentry))
++ return PTR_ERR(newpath.dentry);
++
++ if (S_ISREG(stat->mode)) {
++ err = ovl_copy_up_data(lowerpath, &newpath, stat->size);
++ if (err)
++ goto err_remove;
++ }
++
++ err = ovl_copy_up_xattr(lowerpath->dentry, newpath.dentry);
++ if (err)
++ goto err_remove;
++
++ mutex_lock(&newpath.dentry->d_inode->i_mutex);
++ if (!S_ISLNK(stat->mode))
++ err = ovl_set_mode(newpath.dentry, mode);
++ if (!err)
++ err = ovl_set_timestamps(newpath.dentry, stat);
++ mutex_unlock(&newpath.dentry->d_inode->i_mutex);
++ if (err)
++ goto err_remove;
++
++ ovl_dentry_update(dentry, newpath.dentry);
++
++ /*
++ * Easiest way to get rid of the lower dentry reference is to
++ * drop this dentry. This is neither needed nor possible for
++ * directories.
++ */
++ if (!S_ISDIR(stat->mode))
++ d_drop(dentry);
++
++ return 0;
++
++err_remove:
++ if (S_ISDIR(stat->mode))
++ vfs_rmdir(upperdir->d_inode, newpath.dentry);
++ else
++ vfs_unlink(upperdir->d_inode, newpath.dentry);
++
++ dput(newpath.dentry);
++
++ return err;
++}
++
++/*
++ * Copy up a single dentry
++ *
++ * Directory renames only allowed on "pure upper" (already created on
++ * upper filesystem, never copied up). Directories which are on lower or
++ * are merged may not be renamed. For these -EXDEV is returned and
++ * userspace has to deal with it. This means, when copying up a
++ * directory we can rely on it and ancestors being stable.
++ *
++ * Non-directory renames start with copy up of source if necessary. The
++ * actual rename will only proceed once the copy up was successful. Copy
++ * up uses upper parent i_mutex for exclusion. Since rename can change
++ * d_parent it is possible that the copy up will lock the old parent. At
++ * that point the file will have already been copied up anyway.
++ */
++static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
++ struct path *lowerpath, struct kstat *stat)
++{
++ int err;
++ struct kstat pstat;
++ struct path parentpath;
++ struct dentry *upperdir;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++ char *link = NULL;
++
++ ovl_path_upper(parent, &parentpath);
++ upperdir = parentpath.dentry;
++
++ err = vfs_getattr(&parentpath, &pstat);
++ if (err)
++ return err;
++
++ if (S_ISLNK(stat->mode)) {
++ link = ovl_read_symlink(lowerpath->dentry);
++ if (IS_ERR(link))
++ return PTR_ERR(link);
++ }
++
++ err = -ENOMEM;
++ override_cred = prepare_creds();
++ if (!override_cred)
++ goto out_free_link;
++
++ override_cred->fsuid = stat->uid;
++ override_cred->fsgid = stat->gid;
++ /*
++ * CAP_SYS_ADMIN for copying up extended attributes
++ * CAP_DAC_OVERRIDE for create
++ * CAP_FOWNER for chmod, timestamp update
++ * CAP_FSETID for chmod
++ * CAP_MKNOD for mknod
++ */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
++ cap_raise(override_cred->cap_effective, CAP_FOWNER);
++ cap_raise(override_cred->cap_effective, CAP_FSETID);
++ cap_raise(override_cred->cap_effective, CAP_MKNOD);
++ old_cred = override_creds(override_cred);
++
++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT);
++ if (ovl_path_type(dentry) != OVL_PATH_LOWER) {
++ err = 0;
++ } else {
++ err = ovl_copy_up_locked(upperdir, dentry, lowerpath,
++ stat, link);
++ if (!err) {
++ /* Restore timestamps on parent (best effort) */
++ ovl_set_timestamps(upperdir, &pstat);
++ }
++ }
++
++ mutex_unlock(&upperdir->d_inode->i_mutex);
++
++ revert_creds(old_cred);
++ put_cred(override_cred);
++
++out_free_link:
++ if (link)
++ free_page((unsigned long) link);
++
++ return err;
++}
++
++int ovl_copy_up(struct dentry *dentry)
++{
++ int err;
++
++ err = 0;
++ while (!err) {
++ struct dentry *next;
++ struct dentry *parent;
++ struct path lowerpath;
++ struct kstat stat;
++ enum ovl_path_type type = ovl_path_type(dentry);
++
++ if (type != OVL_PATH_LOWER)
++ break;
++
++ next = dget(dentry);
++ /* find the topmost dentry not yet copied up */
++ for (;;) {
++ parent = dget_parent(next);
++
++ type = ovl_path_type(parent);
++ if (type != OVL_PATH_LOWER)
++ break;
++
++ dput(next);
++ next = parent;
++ }
++
++ ovl_path_lower(next, &lowerpath);
++ err = vfs_getattr(&lowerpath, &stat);
++ if (!err)
++ err = ovl_copy_up_one(parent, next, &lowerpath, &stat);
++
++ dput(parent);
++ dput(next);
++ }
++
++ return err;
++}
++
++/* Optimize by not copying up the file first and truncating later */
++int ovl_copy_up_truncate(struct dentry *dentry, loff_t size)
++{
++ int err;
++ struct kstat stat;
++ struct path lowerpath;
++ struct dentry *parent = dget_parent(dentry);
++
++ err = ovl_copy_up(parent);
++ if (err)
++ goto out_dput_parent;
++
++ ovl_path_lower(dentry, &lowerpath);
++ err = vfs_getattr(&lowerpath, &stat);
++ if (err)
++ goto out_dput_parent;
++
++ if (size < stat.size)
++ stat.size = size;
++
++ err = ovl_copy_up_one(parent, dentry, &lowerpath, &stat);
++
++out_dput_parent:
++ dput(parent);
++ return err;
++}
+diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
+new file mode 100644
+index 0000000..f4969c1
+--- /dev/null
++++ b/fs/overlayfs/dir.c
+@@ -0,0 +1,605 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++#include <linux/fs.h>
++#include <linux/namei.h>
++#include <linux/xattr.h>
++#include <linux/security.h>
++#include <linux/cred.h>
++#include "overlayfs.h"
++
++static const char *ovl_whiteout_symlink = "(overlay-whiteout)";
++
++static int ovl_whiteout(struct dentry *upperdir, struct dentry *dentry)
++{
++ int err;
++ struct dentry *newdentry;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ /* FIXME: recheck lower dentry to see if whiteout is really needed */
++
++ err = -ENOMEM;
++ override_cred = prepare_creds();
++ if (!override_cred)
++ goto out;
++
++ /*
++ * CAP_SYS_ADMIN for setxattr
++ * CAP_DAC_OVERRIDE for symlink creation
++ * CAP_FOWNER for unlink in sticky directory
++ */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
++ cap_raise(override_cred->cap_effective, CAP_FOWNER);
++ override_cred->fsuid = GLOBAL_ROOT_UID;
++ override_cred->fsgid = GLOBAL_ROOT_GID;
++ old_cred = override_creds(override_cred);
++
++ newdentry = lookup_one_len(dentry->d_name.name, upperdir,
++ dentry->d_name.len);
++ err = PTR_ERR(newdentry);
++ if (IS_ERR(newdentry))
++ goto out_put_cred;
++
++ /* Just been removed within the same locked region */
++ WARN_ON(newdentry->d_inode);
++
++ err = vfs_symlink(upperdir->d_inode, newdentry, ovl_whiteout_symlink);
++ if (err)
++ goto out_dput;
++
++ ovl_dentry_version_inc(dentry->d_parent);
++
++ err = vfs_setxattr(newdentry, ovl_whiteout_xattr, "y", 1, 0);
++ if (err)
++ vfs_unlink(upperdir->d_inode, newdentry);
++
++out_dput:
++ dput(newdentry);
++out_put_cred:
++ revert_creds(old_cred);
++ put_cred(override_cred);
++out:
++ if (err) {
++ /*
++ * There's no way to recover from failure to whiteout.
++ * What should we do? Log a big fat error and... ?
++ */
++ pr_err("overlayfs: ERROR - failed to whiteout '%s'\n",
++ dentry->d_name.name);
++ }
++
++ return err;
++}
++
++static struct dentry *ovl_lookup_create(struct dentry *upperdir,
++ struct dentry *template)
++{
++ int err;
++ struct dentry *newdentry;
++ struct qstr *name = &template->d_name;
++
++ newdentry = lookup_one_len(name->name, upperdir, name->len);
++ if (IS_ERR(newdentry))
++ return newdentry;
++
++ if (newdentry->d_inode) {
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ /* No need to check whiteout if lower parent is non-existent */
++ err = -EEXIST;
++ if (!ovl_dentry_lower(template->d_parent))
++ goto out_dput;
++
++ if (!S_ISLNK(newdentry->d_inode->i_mode))
++ goto out_dput;
++
++ err = -ENOMEM;
++ override_cred = prepare_creds();
++ if (!override_cred)
++ goto out_dput;
++
++ /*
++ * CAP_SYS_ADMIN for getxattr
++ * CAP_FOWNER for unlink in sticky directory
++ */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ cap_raise(override_cred->cap_effective, CAP_FOWNER);
++ old_cred = override_creds(override_cred);
++
++ err = -EEXIST;
++ if (ovl_is_whiteout(newdentry))
++ err = vfs_unlink(upperdir->d_inode, newdentry);
++
++ revert_creds(old_cred);
++ put_cred(override_cred);
++ if (err)
++ goto out_dput;
++
++ dput(newdentry);
++ newdentry = lookup_one_len(name->name, upperdir, name->len);
++ if (IS_ERR(newdentry)) {
++ ovl_whiteout(upperdir, template);
++ return newdentry;
++ }
++
++ /*
++ * Whiteout just been successfully removed, parent
++ * i_mutex is still held, there's no way the lookup
++ * could return positive.
++ */
++ WARN_ON(newdentry->d_inode);
++ }
++
++ return newdentry;
++
++out_dput:
++ dput(newdentry);
++ return ERR_PTR(err);
++}
++
++struct dentry *ovl_upper_create(struct dentry *upperdir, struct dentry *dentry,
++ struct kstat *stat, const char *link)
++{
++ int err;
++ struct dentry *newdentry;
++ struct inode *dir = upperdir->d_inode;
++
++ newdentry = ovl_lookup_create(upperdir, dentry);
++ if (IS_ERR(newdentry))
++ goto out;
++
++ switch (stat->mode & S_IFMT) {
++ case S_IFREG:
++ err = vfs_create(dir, newdentry, stat->mode, NULL);
++ break;
++
++ case S_IFDIR:
++ err = vfs_mkdir(dir, newdentry, stat->mode);
++ break;
++
++ case S_IFCHR:
++ case S_IFBLK:
++ case S_IFIFO:
++ case S_IFSOCK:
++ err = vfs_mknod(dir, newdentry, stat->mode, stat->rdev);
++ break;
++
++ case S_IFLNK:
++ err = vfs_symlink(dir, newdentry, link);
++ break;
++
++ default:
++ err = -EPERM;
++ }
++ if (err) {
++ if (ovl_dentry_is_opaque(dentry))
++ ovl_whiteout(upperdir, dentry);
++ dput(newdentry);
++ newdentry = ERR_PTR(err);
++ } else if (WARN_ON(!newdentry->d_inode)) {
++ /*
++ * Not quite sure if non-instantiated dentry is legal or not.
++ * VFS doesn't seem to care so check and warn here.
++ */
++ dput(newdentry);
++ newdentry = ERR_PTR(-ENOENT);
++ }
++
++out:
++ return newdentry;
++
++}
++
++static int ovl_set_opaque(struct dentry *upperdentry)
++{
++ int err;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ override_cred = prepare_creds();
++ if (!override_cred)
++ return -ENOMEM;
++
++ /* CAP_SYS_ADMIN for setxattr of "trusted" namespace */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ old_cred = override_creds(override_cred);
++ err = vfs_setxattr(upperdentry, ovl_opaque_xattr, "y", 1, 0);
++ revert_creds(old_cred);
++ put_cred(override_cred);
++
++ return err;
++}
++
++static int ovl_remove_opaque(struct dentry *upperdentry)
++{
++ int err;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ override_cred = prepare_creds();
++ if (!override_cred)
++ return -ENOMEM;
++
++ /* CAP_SYS_ADMIN for removexattr of "trusted" namespace */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ old_cred = override_creds(override_cred);
++ err = vfs_removexattr(upperdentry, ovl_opaque_xattr);
++ revert_creds(old_cred);
++ put_cred(override_cred);
++
++ return err;
++}
++
++static int ovl_dir_getattr(struct vfsmount *mnt, struct dentry *dentry,
++ struct kstat *stat)
++{
++ int err;
++ enum ovl_path_type type;
++ struct path realpath;
++
++ type = ovl_path_real(dentry, &realpath);
++ err = vfs_getattr(&realpath, stat);
++ if (err)
++ return err;
++
++ stat->dev = dentry->d_sb->s_dev;
++ stat->ino = dentry->d_inode->i_ino;
++
++ /*
++ * It's probably not worth it to count subdirs to get the
++ * correct link count. nlink=1 seems to pacify 'find' and
++ * other utilities.
++ */
++ if (type == OVL_PATH_MERGE)
++ stat->nlink = 1;
++
++ return 0;
++}
++
++static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev,
++ const char *link)
++{
++ int err;
++ struct dentry *newdentry;
++ struct dentry *upperdir;
++ struct inode *inode;
++ struct kstat stat = {
++ .mode = mode,
++ .rdev = rdev,
++ };
++
++ err = -ENOMEM;
++ inode = ovl_new_inode(dentry->d_sb, mode, dentry->d_fsdata);
++ if (!inode)
++ goto out;
++
++ err = ovl_copy_up(dentry->d_parent);
++ if (err)
++ goto out_iput;
++
++ upperdir = ovl_dentry_upper(dentry->d_parent);
++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT);
++
++ newdentry = ovl_upper_create(upperdir, dentry, &stat, link);
++ err = PTR_ERR(newdentry);
++ if (IS_ERR(newdentry))
++ goto out_unlock;
++
++ ovl_dentry_version_inc(dentry->d_parent);
++ if (ovl_dentry_is_opaque(dentry) && S_ISDIR(mode)) {
++ err = ovl_set_opaque(newdentry);
++ if (err) {
++ vfs_rmdir(upperdir->d_inode, newdentry);
++ ovl_whiteout(upperdir, dentry);
++ goto out_dput;
++ }
++ }
++ ovl_dentry_update(dentry, newdentry);
++ ovl_copyattr(newdentry->d_inode, inode);
++ d_instantiate(dentry, inode);
++ inode = NULL;
++ newdentry = NULL;
++ err = 0;
++
++out_dput:
++ dput(newdentry);
++out_unlock:
++ mutex_unlock(&upperdir->d_inode->i_mutex);
++out_iput:
++ iput(inode);
++out:
++ return err;
++}
++
++static int ovl_create(struct inode *dir, struct dentry *dentry, umode_t mode,
++ bool excl)
++{
++ return ovl_create_object(dentry, (mode & 07777) | S_IFREG, 0, NULL);
++}
++
++static int ovl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
++{
++ return ovl_create_object(dentry, (mode & 07777) | S_IFDIR, 0, NULL);
++}
++
++static int ovl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
++ dev_t rdev)
++{
++ return ovl_create_object(dentry, mode, rdev, NULL);
++}
++
++static int ovl_symlink(struct inode *dir, struct dentry *dentry,
++ const char *link)
++{
++ return ovl_create_object(dentry, S_IFLNK, 0, link);
++}
++
++static int ovl_do_remove(struct dentry *dentry, bool is_dir)
++{
++ int err;
++ enum ovl_path_type type;
++ struct path realpath;
++ struct dentry *upperdir;
++
++ err = ovl_copy_up(dentry->d_parent);
++ if (err)
++ return err;
++
++ upperdir = ovl_dentry_upper(dentry->d_parent);
++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT);
++ type = ovl_path_real(dentry, &realpath);
++ if (type != OVL_PATH_LOWER) {
++ err = -ESTALE;
++ if (realpath.dentry->d_parent != upperdir)
++ goto out_d_drop;
++
++ /* FIXME: create whiteout up front and rename to target */
++
++ if (is_dir)
++ err = vfs_rmdir(upperdir->d_inode, realpath.dentry);
++ else
++ err = vfs_unlink(upperdir->d_inode, realpath.dentry);
++ if (err)
++ goto out_d_drop;
++
++ ovl_dentry_version_inc(dentry->d_parent);
++ }
++
++ if (type != OVL_PATH_UPPER || ovl_dentry_is_opaque(dentry))
++ err = ovl_whiteout(upperdir, dentry);
++
++ /*
++ * Keeping this dentry hashed would mean having to release
++ * upperpath/lowerpath, which could only be done if we are the
++ * sole user of this dentry. Too tricky... Just unhash for
++ * now.
++ */
++out_d_drop:
++ d_drop(dentry);
++ mutex_unlock(&upperdir->d_inode->i_mutex);
++
++ return err;
++}
++
++static int ovl_unlink(struct inode *dir, struct dentry *dentry)
++{
++ return ovl_do_remove(dentry, false);
++}
++
++
++static int ovl_rmdir(struct inode *dir, struct dentry *dentry)
++{
++ int err;
++ enum ovl_path_type type;
++
++ type = ovl_path_type(dentry);
++ if (type != OVL_PATH_UPPER) {
++ err = ovl_check_empty_and_clear(dentry, type);
++ if (err)
++ return err;
++ }
++
++ return ovl_do_remove(dentry, true);
++}
++
++static int ovl_link(struct dentry *old, struct inode *newdir,
++ struct dentry *new)
++{
++ int err;
++ struct dentry *olddentry;
++ struct dentry *newdentry;
++ struct dentry *upperdir;
++ struct inode *newinode;
++
++ err = ovl_copy_up(old);
++ if (err)
++ goto out;
++
++ err = ovl_copy_up(new->d_parent);
++ if (err)
++ goto out;
++
++ upperdir = ovl_dentry_upper(new->d_parent);
++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT);
++ newdentry = ovl_lookup_create(upperdir, new);
++ err = PTR_ERR(newdentry);
++ if (IS_ERR(newdentry))
++ goto out_unlock;
++
++ olddentry = ovl_dentry_upper(old);
++ err = vfs_link(olddentry, upperdir->d_inode, newdentry);
++ if (!err) {
++ if (WARN_ON(!newdentry->d_inode)) {
++ dput(newdentry);
++ err = -ENOENT;
++ goto out_unlock;
++ }
++ newinode = ovl_new_inode(old->d_sb, newdentry->d_inode->i_mode,
++ new->d_fsdata);
++ if (!newinode) {
++ err = -ENOMEM;
++ goto link_fail;
++ }
++ ovl_copyattr(upperdir->d_inode, newinode);
++
++ ovl_dentry_version_inc(new->d_parent);
++ ovl_dentry_update(new, newdentry);
++
++ d_instantiate(new, newinode);
++ } else {
++link_fail:
++ if (ovl_dentry_is_opaque(new))
++ ovl_whiteout(upperdir, new);
++ dput(newdentry);
++ }
++out_unlock:
++ mutex_unlock(&upperdir->d_inode->i_mutex);
++out:
++ return err;
++}
++
++static int ovl_rename(struct inode *olddir, struct dentry *old,
++ struct inode *newdir, struct dentry *new)
++{
++ int err;
++ enum ovl_path_type old_type;
++ enum ovl_path_type new_type;
++ struct dentry *old_upperdir;
++ struct dentry *new_upperdir;
++ struct dentry *olddentry;
++ struct dentry *newdentry;
++ struct dentry *trap;
++ bool old_opaque;
++ bool new_opaque;
++ bool new_create = false;
++ bool is_dir = S_ISDIR(old->d_inode->i_mode);
++
++ /* Don't copy up directory trees */
++ old_type = ovl_path_type(old);
++ if (old_type != OVL_PATH_UPPER && is_dir)
++ return -EXDEV;
++
++ if (new->d_inode) {
++ new_type = ovl_path_type(new);
++
++ if (new_type == OVL_PATH_LOWER && old_type == OVL_PATH_LOWER) {
++ if (ovl_dentry_lower(old)->d_inode ==
++ ovl_dentry_lower(new)->d_inode)
++ return 0;
++ }
++ if (new_type != OVL_PATH_LOWER && old_type != OVL_PATH_LOWER) {
++ if (ovl_dentry_upper(old)->d_inode ==
++ ovl_dentry_upper(new)->d_inode)
++ return 0;
++ }
++
++ if (new_type != OVL_PATH_UPPER &&
++ S_ISDIR(new->d_inode->i_mode)) {
++ err = ovl_check_empty_and_clear(new, new_type);
++ if (err)
++ return err;
++ }
++ } else {
++ new_type = OVL_PATH_UPPER;
++ }
++
++ err = ovl_copy_up(old);
++ if (err)
++ return err;
++
++ err = ovl_copy_up(new->d_parent);
++ if (err)
++ return err;
++
++ old_upperdir = ovl_dentry_upper(old->d_parent);
++ new_upperdir = ovl_dentry_upper(new->d_parent);
++
++ trap = lock_rename(new_upperdir, old_upperdir);
++
++ olddentry = ovl_dentry_upper(old);
++ newdentry = ovl_dentry_upper(new);
++ if (newdentry) {
++ dget(newdentry);
++ } else {
++ new_create = true;
++ newdentry = ovl_lookup_create(new_upperdir, new);
++ err = PTR_ERR(newdentry);
++ if (IS_ERR(newdentry))
++ goto out_unlock;
++ }
++
++ err = -ESTALE;
++ if (olddentry->d_parent != old_upperdir)
++ goto out_dput;
++ if (newdentry->d_parent != new_upperdir)
++ goto out_dput;
++ if (olddentry == trap)
++ goto out_dput;
++ if (newdentry == trap)
++ goto out_dput;
++
++ old_opaque = ovl_dentry_is_opaque(old);
++ new_opaque = ovl_dentry_is_opaque(new) || new_type != OVL_PATH_UPPER;
++
++ if (is_dir && !old_opaque && new_opaque) {
++ err = ovl_set_opaque(olddentry);
++ if (err)
++ goto out_dput;
++ }
++
++ err = vfs_rename(old_upperdir->d_inode, olddentry,
++ new_upperdir->d_inode, newdentry);
++
++ if (err) {
++ if (new_create && ovl_dentry_is_opaque(new))
++ ovl_whiteout(new_upperdir, new);
++ if (is_dir && !old_opaque && new_opaque)
++ ovl_remove_opaque(olddentry);
++ goto out_dput;
++ }
++
++ if (old_type != OVL_PATH_UPPER || old_opaque)
++ err = ovl_whiteout(old_upperdir, old);
++ if (is_dir && old_opaque && !new_opaque)
++ ovl_remove_opaque(olddentry);
++
++ if (old_opaque != new_opaque)
++ ovl_dentry_set_opaque(old, new_opaque);
++
++ ovl_dentry_version_inc(old->d_parent);
++ ovl_dentry_version_inc(new->d_parent);
++
++out_dput:
++ dput(newdentry);
++out_unlock:
++ unlock_rename(new_upperdir, old_upperdir);
++ return err;
++}
++
++const struct inode_operations ovl_dir_inode_operations = {
++ .lookup = ovl_lookup,
++ .mkdir = ovl_mkdir,
++ .symlink = ovl_symlink,
++ .unlink = ovl_unlink,
++ .rmdir = ovl_rmdir,
++ .rename = ovl_rename,
++ .link = ovl_link,
++ .setattr = ovl_setattr,
++ .create = ovl_create,
++ .mknod = ovl_mknod,
++ .permission = ovl_permission,
++ .getattr = ovl_dir_getattr,
++ .setxattr = ovl_setxattr,
++ .getxattr = ovl_getxattr,
++ .listxattr = ovl_listxattr,
++ .removexattr = ovl_removexattr,
++};
+diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
+new file mode 100644
+index 0000000..ee37e92
+--- /dev/null
++++ b/fs/overlayfs/inode.c
+@@ -0,0 +1,372 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++#include <linux/fs.h>
++#include <linux/slab.h>
++#include <linux/xattr.h>
++#include "overlayfs.h"
++
++int ovl_setattr(struct dentry *dentry, struct iattr *attr)
++{
++ struct dentry *upperdentry;
++ int err;
++
++ if ((attr->ia_valid & ATTR_SIZE) && !ovl_dentry_upper(dentry))
++ err = ovl_copy_up_truncate(dentry, attr->ia_size);
++ else
++ err = ovl_copy_up(dentry);
++ if (err)
++ return err;
++
++ upperdentry = ovl_dentry_upper(dentry);
++
++ if (attr->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
++ attr->ia_valid &= ~ATTR_MODE;
++
++ mutex_lock(&upperdentry->d_inode->i_mutex);
++ err = notify_change(upperdentry, attr);
++ if (!err)
++ ovl_copyattr(upperdentry->d_inode, dentry->d_inode);
++ mutex_unlock(&upperdentry->d_inode->i_mutex);
++
++ return err;
++}
++
++static int ovl_getattr(struct vfsmount *mnt, struct dentry *dentry,
++ struct kstat *stat)
++{
++ struct path realpath;
++
++ ovl_path_real(dentry, &realpath);
++ return vfs_getattr(&realpath, stat);
++}
++
++int ovl_permission(struct inode *inode, int mask)
++{
++ struct ovl_entry *oe;
++ struct dentry *alias = NULL;
++ struct inode *realinode;
++ struct dentry *realdentry;
++ bool is_upper;
++ int err;
++
++ if (S_ISDIR(inode->i_mode)) {
++ oe = inode->i_private;
++ } else if (mask & MAY_NOT_BLOCK) {
++ return -ECHILD;
++ } else {
++ /*
++ * For non-directories find an alias and get the info
++ * from there.
++ */
++ alias = d_find_any_alias(inode);
++ if (WARN_ON(!alias))
++ return -ENOENT;
++
++ oe = alias->d_fsdata;
++ }
++
++ realdentry = ovl_entry_real(oe, &is_upper);
++
++ /* Careful in RCU walk mode */
++ realinode = ACCESS_ONCE(realdentry->d_inode);
++ if (!realinode) {
++ WARN_ON(!(mask & MAY_NOT_BLOCK));
++ err = -ENOENT;
++ goto out_dput;
++ }
++
++ if (mask & MAY_WRITE) {
++ umode_t mode = realinode->i_mode;
++
++ /*
++ * Writes will always be redirected to upper layer, so
++ * ignore lower layer being read-only.
++ *
++ * If the overlay itself is read-only then proceed
++ * with the permission check, don't return EROFS.
++ * This will only happen if this is the lower layer of
++ * another overlayfs.
++ *
++ * If upper fs becomes read-only after the overlay was
++ * constructed return EROFS to prevent modification of
++ * upper layer.
++ */
++ err = -EROFS;
++ if (is_upper && !IS_RDONLY(inode) && IS_RDONLY(realinode) &&
++ (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
++ goto out_dput;
++ }
++
++ err = __inode_permission(realinode, mask);
++out_dput:
++ dput(alias);
++ return err;
++}
++
++
++struct ovl_link_data {
++ struct dentry *realdentry;
++ void *cookie;
++};
++
++static void *ovl_follow_link(struct dentry *dentry, struct nameidata *nd)
++{
++ void *ret;
++ struct dentry *realdentry;
++ struct inode *realinode;
++
++ realdentry = ovl_dentry_real(dentry);
++ realinode = realdentry->d_inode;
++
++ if (WARN_ON(!realinode->i_op->follow_link))
++ return ERR_PTR(-EPERM);
++
++ ret = realinode->i_op->follow_link(realdentry, nd);
++ if (IS_ERR(ret))
++ return ret;
++
++ if (realinode->i_op->put_link) {
++ struct ovl_link_data *data;
++
++ data = kmalloc(sizeof(struct ovl_link_data), GFP_KERNEL);
++ if (!data) {
++ realinode->i_op->put_link(realdentry, nd, ret);
++ return ERR_PTR(-ENOMEM);
++ }
++ data->realdentry = realdentry;
++ data->cookie = ret;
++
++ return data;
++ } else {
++ return NULL;
++ }
++}
++
++static void ovl_put_link(struct dentry *dentry, struct nameidata *nd, void *c)
++{
++ struct inode *realinode;
++ struct ovl_link_data *data = c;
++
++ if (!data)
++ return;
++
++ realinode = data->realdentry->d_inode;
++ realinode->i_op->put_link(data->realdentry, nd, data->cookie);
++ kfree(data);
++}
++
++static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
++{
++ struct path realpath;
++ struct inode *realinode;
++
++ ovl_path_real(dentry, &realpath);
++ realinode = realpath.dentry->d_inode;
++
++ if (!realinode->i_op->readlink)
++ return -EINVAL;
++
++ touch_atime(&realpath);
++
++ return realinode->i_op->readlink(realpath.dentry, buf, bufsiz);
++}
++
++
++static bool ovl_is_private_xattr(const char *name)
++{
++ return strncmp(name, "trusted.overlay.", 14) == 0;
++}
++
++int ovl_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags)
++{
++ int err;
++ struct dentry *upperdentry;
++
++ if (ovl_is_private_xattr(name))
++ return -EPERM;
++
++ err = ovl_copy_up(dentry);
++ if (err)
++ return err;
++
++ upperdentry = ovl_dentry_upper(dentry);
++ return vfs_setxattr(upperdentry, name, value, size, flags);
++}
++
++ssize_t ovl_getxattr(struct dentry *dentry, const char *name,
++ void *value, size_t size)
++{
++ if (ovl_path_type(dentry->d_parent) == OVL_PATH_MERGE &&
++ ovl_is_private_xattr(name))
++ return -ENODATA;
++
++ return vfs_getxattr(ovl_dentry_real(dentry), name, value, size);
++}
++
++ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
++{
++ ssize_t res;
++ int off;
++
++ res = vfs_listxattr(ovl_dentry_real(dentry), list, size);
++ if (res <= 0 || size == 0)
++ return res;
++
++ if (ovl_path_type(dentry->d_parent) != OVL_PATH_MERGE)
++ return res;
++
++ /* filter out private xattrs */
++ for (off = 0; off < res;) {
++ char *s = list + off;
++ size_t slen = strlen(s) + 1;
++
++ BUG_ON(off + slen > res);
++
++ if (ovl_is_private_xattr(s)) {
++ res -= slen;
++ memmove(s, s + slen, res - off);
++ } else {
++ off += slen;
++ }
++ }
++
++ return res;
++}
++
++int ovl_removexattr(struct dentry *dentry, const char *name)
++{
++ int err;
++ struct path realpath;
++ enum ovl_path_type type;
++
++ if (ovl_path_type(dentry->d_parent) == OVL_PATH_MERGE &&
++ ovl_is_private_xattr(name))
++ return -ENODATA;
++
++ type = ovl_path_real(dentry, &realpath);
++ if (type == OVL_PATH_LOWER) {
++ err = vfs_getxattr(realpath.dentry, name, NULL, 0);
++ if (err < 0)
++ return err;
++
++ err = ovl_copy_up(dentry);
++ if (err)
++ return err;
++
++ ovl_path_upper(dentry, &realpath);
++ }
++
++ return vfs_removexattr(realpath.dentry, name);
++}
++
++static bool ovl_open_need_copy_up(int flags, enum ovl_path_type type,
++ struct dentry *realdentry)
++{
++ if (type != OVL_PATH_LOWER)
++ return false;
++
++ if (special_file(realdentry->d_inode->i_mode))
++ return false;
++
++ if (!(OPEN_FMODE(flags) & FMODE_WRITE) && !(flags & O_TRUNC))
++ return false;
++
++ return true;
++}
++
++static int ovl_dentry_open(struct dentry *dentry, struct file *file,
++ const struct cred *cred)
++{
++ int err;
++ struct path realpath;
++ enum ovl_path_type type;
++
++ type = ovl_path_real(dentry, &realpath);
++ if (ovl_open_need_copy_up(file->f_flags, type, realpath.dentry)) {
++ if (file->f_flags & O_TRUNC)
++ err = ovl_copy_up_truncate(dentry, 0);
++ else
++ err = ovl_copy_up(dentry);
++ if (err)
++ return err;
++
++ ovl_path_upper(dentry, &realpath);
++ }
++
++ return vfs_open(&realpath, file, cred);
++}
++
++static const struct inode_operations ovl_file_inode_operations = {
++ .setattr = ovl_setattr,
++ .permission = ovl_permission,
++ .getattr = ovl_getattr,
++ .setxattr = ovl_setxattr,
++ .getxattr = ovl_getxattr,
++ .listxattr = ovl_listxattr,
++ .removexattr = ovl_removexattr,
++ .dentry_open = ovl_dentry_open,
++};
++
++static const struct inode_operations ovl_symlink_inode_operations = {
++ .setattr = ovl_setattr,
++ .follow_link = ovl_follow_link,
++ .put_link = ovl_put_link,
++ .readlink = ovl_readlink,
++ .getattr = ovl_getattr,
++ .setxattr = ovl_setxattr,
++ .getxattr = ovl_getxattr,
++ .listxattr = ovl_listxattr,
++ .removexattr = ovl_removexattr,
++};
++
++struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
++ struct ovl_entry *oe)
++{
++ struct inode *inode;
++
++ inode = new_inode(sb);
++ if (!inode)
++ return NULL;
++
++ mode &= S_IFMT;
++
++ inode->i_ino = get_next_ino();
++ inode->i_mode = mode;
++ inode->i_flags |= S_NOATIME | S_NOCMTIME;
++
++ switch (mode) {
++ case S_IFDIR:
++ inode->i_private = oe;
++ inode->i_op = &ovl_dir_inode_operations;
++ inode->i_fop = &ovl_dir_operations;
++ break;
++
++ case S_IFLNK:
++ inode->i_op = &ovl_symlink_inode_operations;
++ break;
++
++ case S_IFREG:
++ case S_IFSOCK:
++ case S_IFBLK:
++ case S_IFCHR:
++ case S_IFIFO:
++ inode->i_op = &ovl_file_inode_operations;
++ break;
++
++ default:
++ WARN(1, "illegal file type: %i\n", mode);
++ iput(inode);
++ inode = NULL;
++ }
++
++ return inode;
++
++}
+diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
+new file mode 100644
+index 0000000..1cba38f
+--- /dev/null
++++ b/fs/overlayfs/overlayfs.h
+@@ -0,0 +1,70 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++struct ovl_entry;
++
++enum ovl_path_type {
++ OVL_PATH_UPPER,
++ OVL_PATH_MERGE,
++ OVL_PATH_LOWER,
++};
++
++extern const char *ovl_opaque_xattr;
++extern const char *ovl_whiteout_xattr;
++extern const struct dentry_operations ovl_dentry_operations;
++
++enum ovl_path_type ovl_path_type(struct dentry *dentry);
++u64 ovl_dentry_version_get(struct dentry *dentry);
++void ovl_dentry_version_inc(struct dentry *dentry);
++void ovl_path_upper(struct dentry *dentry, struct path *path);
++void ovl_path_lower(struct dentry *dentry, struct path *path);
++enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path);
++struct dentry *ovl_dentry_upper(struct dentry *dentry);
++struct dentry *ovl_dentry_lower(struct dentry *dentry);
++struct dentry *ovl_dentry_real(struct dentry *dentry);
++struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper);
++bool ovl_dentry_is_opaque(struct dentry *dentry);
++void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque);
++bool ovl_is_whiteout(struct dentry *dentry);
++void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry);
++struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
++ unsigned int flags);
++struct file *ovl_path_open(struct path *path, int flags);
++
++struct dentry *ovl_upper_create(struct dentry *upperdir, struct dentry *dentry,
++ struct kstat *stat, const char *link);
++
++/* readdir.c */
++extern const struct file_operations ovl_dir_operations;
++int ovl_check_empty_and_clear(struct dentry *dentry, enum ovl_path_type type);
++
++/* inode.c */
++int ovl_setattr(struct dentry *dentry, struct iattr *attr);
++int ovl_permission(struct inode *inode, int mask);
++int ovl_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags);
++ssize_t ovl_getxattr(struct dentry *dentry, const char *name,
++ void *value, size_t size);
++ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
++int ovl_removexattr(struct dentry *dentry, const char *name);
++
++struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
++ struct ovl_entry *oe);
++static inline void ovl_copyattr(struct inode *from, struct inode *to)
++{
++ to->i_uid = from->i_uid;
++ to->i_gid = from->i_gid;
++}
++
++/* dir.c */
++extern const struct inode_operations ovl_dir_inode_operations;
++
++/* copy_up.c */
++int ovl_copy_up(struct dentry *dentry);
++int ovl_copy_up_truncate(struct dentry *dentry, loff_t size);
+diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
+new file mode 100644
+index 0000000..4c18abf
+--- /dev/null
++++ b/fs/overlayfs/readdir.c
+@@ -0,0 +1,566 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++#include <linux/fs.h>
++#include <linux/slab.h>
++#include <linux/namei.h>
++#include <linux/file.h>
++#include <linux/xattr.h>
++#include <linux/rbtree.h>
++#include <linux/security.h>
++#include <linux/cred.h>
++#include "overlayfs.h"
++
++struct ovl_cache_entry {
++ const char *name;
++ unsigned int len;
++ unsigned int type;
++ u64 ino;
++ bool is_whiteout;
++ struct list_head l_node;
++ struct rb_node node;
++};
++
++struct ovl_readdir_data {
++ struct rb_root *root;
++ struct list_head *list;
++ struct list_head *middle;
++ struct dentry *dir;
++ int count;
++ int err;
++};
++
++struct ovl_dir_file {
++ bool is_real;
++ bool is_cached;
++ struct list_head cursor;
++ u64 cache_version;
++ struct list_head cache;
++ struct file *realfile;
++};
++
++static struct ovl_cache_entry *ovl_cache_entry_from_node(struct rb_node *n)
++{
++ return container_of(n, struct ovl_cache_entry, node);
++}
++
++static struct ovl_cache_entry *ovl_cache_entry_find(struct rb_root *root,
++ const char *name, int len)
++{
++ struct rb_node *node = root->rb_node;
++ int cmp;
++
++ while (node) {
++ struct ovl_cache_entry *p = ovl_cache_entry_from_node(node);
++
++ cmp = strncmp(name, p->name, len);
++ if (cmp > 0)
++ node = p->node.rb_right;
++ else if (cmp < 0 || len < p->len)
++ node = p->node.rb_left;
++ else
++ return p;
++ }
++
++ return NULL;
++}
++
++static struct ovl_cache_entry *ovl_cache_entry_new(const char *name, int len,
++ u64 ino, unsigned int d_type)
++{
++ struct ovl_cache_entry *p;
++
++ p = kmalloc(sizeof(*p) + len + 1, GFP_KERNEL);
++ if (p) {
++ char *name_copy = (char *) (p + 1);
++ memcpy(name_copy, name, len);
++ name_copy[len] = '\0';
++ p->name = name_copy;
++ p->len = len;
++ p->type = d_type;
++ p->ino = ino;
++ p->is_whiteout = false;
++ }
++
++ return p;
++}
++
++static int ovl_cache_entry_add_rb(struct ovl_readdir_data *rdd,
++ const char *name, int len, u64 ino,
++ unsigned int d_type)
++{
++ struct rb_node **newp = &rdd->root->rb_node;
++ struct rb_node *parent = NULL;
++ struct ovl_cache_entry *p;
++
++ while (*newp) {
++ int cmp;
++ struct ovl_cache_entry *tmp;
++
++ parent = *newp;
++ tmp = ovl_cache_entry_from_node(*newp);
++ cmp = strncmp(name, tmp->name, len);
++ if (cmp > 0)
++ newp = &tmp->node.rb_right;
++ else if (cmp < 0 || len < tmp->len)
++ newp = &tmp->node.rb_left;
++ else
++ return 0;
++ }
++
++ p = ovl_cache_entry_new(name, len, ino, d_type);
++ if (p == NULL)
++ return -ENOMEM;
++
++ list_add_tail(&p->l_node, rdd->list);
++ rb_link_node(&p->node, parent, newp);
++ rb_insert_color(&p->node, rdd->root);
++
++ return 0;
++}
++
++static int ovl_fill_lower(void *buf, const char *name, int namelen,
++ loff_t offset, u64 ino, unsigned int d_type)
++{
++ struct ovl_readdir_data *rdd = buf;
++ struct ovl_cache_entry *p;
++
++ rdd->count++;
++ p = ovl_cache_entry_find(rdd->root, name, namelen);
++ if (p) {
++ list_move_tail(&p->l_node, rdd->middle);
++ } else {
++ p = ovl_cache_entry_new(name, namelen, ino, d_type);
++ if (p == NULL)
++ rdd->err = -ENOMEM;
++ else
++ list_add_tail(&p->l_node, rdd->middle);
++ }
++
++ return rdd->err;
++}
++
++static void ovl_cache_free(struct list_head *list)
++{
++ struct ovl_cache_entry *p;
++ struct ovl_cache_entry *n;
++
++ list_for_each_entry_safe(p, n, list, l_node)
++ kfree(p);
++
++ INIT_LIST_HEAD(list);
++}
++
++static int ovl_fill_upper(void *buf, const char *name, int namelen,
++ loff_t offset, u64 ino, unsigned int d_type)
++{
++ struct ovl_readdir_data *rdd = buf;
++
++ rdd->count++;
++ return ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type);
++}
++
++static inline int ovl_dir_read(struct path *realpath,
++ struct ovl_readdir_data *rdd, filldir_t filler)
++{
++ struct file *realfile;
++ int err;
++
++ realfile = ovl_path_open(realpath, O_RDONLY | O_DIRECTORY);
++ if (IS_ERR(realfile))
++ return PTR_ERR(realfile);
++
++ do {
++ rdd->count = 0;
++ rdd->err = 0;
++ err = vfs_readdir(realfile, filler, rdd);
++ if (err >= 0)
++ err = rdd->err;
++ } while (!err && rdd->count);
++ fput(realfile);
++
++ return 0;
++}
++
++static void ovl_dir_reset(struct file *file)
++{
++ struct ovl_dir_file *od = file->private_data;
++ enum ovl_path_type type = ovl_path_type(file->f_path.dentry);
++
++ if (ovl_dentry_version_get(file->f_path.dentry) != od->cache_version) {
++ list_del_init(&od->cursor);
++ ovl_cache_free(&od->cache);
++ od->is_cached = false;
++ }
++ WARN_ON(!od->is_real && type != OVL_PATH_MERGE);
++ if (od->is_real && type == OVL_PATH_MERGE) {
++ fput(od->realfile);
++ od->realfile = NULL;
++ od->is_real = false;
++ }
++}
++
++static int ovl_dir_mark_whiteouts(struct ovl_readdir_data *rdd)
++{
++ struct ovl_cache_entry *p;
++ struct dentry *dentry;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ override_cred = prepare_creds();
++ if (!override_cred) {
++ ovl_cache_free(rdd->list);
++ return -ENOMEM;
++ }
++
++ /*
++ * CAP_SYS_ADMIN for getxattr
++ * CAP_DAC_OVERRIDE for lookup
++ */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
++ old_cred = override_creds(override_cred);
++
++ mutex_lock(&rdd->dir->d_inode->i_mutex);
++ list_for_each_entry(p, rdd->list, l_node) {
++ if (p->type != DT_LNK)
++ continue;
++
++ dentry = lookup_one_len(p->name, rdd->dir, p->len);
++ if (IS_ERR(dentry))
++ continue;
++
++ p->is_whiteout = ovl_is_whiteout(dentry);
++ dput(dentry);
++ }
++ mutex_unlock(&rdd->dir->d_inode->i_mutex);
++
++ revert_creds(old_cred);
++ put_cred(override_cred);
++
++ return 0;
++}
++
++static inline int ovl_dir_read_merged(struct path *upperpath,
++ struct path *lowerpath,
++ struct ovl_readdir_data *rdd)
++{
++ int err;
++ struct rb_root root = RB_ROOT;
++ struct list_head middle;
++
++ rdd->root = &root;
++ if (upperpath->dentry) {
++ rdd->dir = upperpath->dentry;
++ err = ovl_dir_read(upperpath, rdd, ovl_fill_upper);
++ if (err)
++ goto out;
++
++ err = ovl_dir_mark_whiteouts(rdd);
++ if (err)
++ goto out;
++ }
++ /*
++ * Insert lowerpath entries before upperpath ones, this allows
++ * offsets to be reasonably constant
++ */
++ list_add(&middle, rdd->list);
++ rdd->middle = &middle;
++ err = ovl_dir_read(lowerpath, rdd, ovl_fill_lower);
++ list_del(&middle);
++out:
++ rdd->root = NULL;
++
++ return err;
++}
++
++static void ovl_seek_cursor(struct ovl_dir_file *od, loff_t pos)
++{
++ struct list_head *l;
++ loff_t off;
++
++ l = od->cache.next;
++ for (off = 0; off < pos; off++) {
++ if (l == &od->cache)
++ break;
++ l = l->next;
++ }
++ list_move_tail(&od->cursor, l);
++}
++
++static int ovl_readdir(struct file *file, void *buf, filldir_t filler)
++{
++ struct ovl_dir_file *od = file->private_data;
++ int res;
++
++ if (!file->f_pos)
++ ovl_dir_reset(file);
++
++ if (od->is_real) {
++ res = vfs_readdir(od->realfile, filler, buf);
++ file->f_pos = od->realfile->f_pos;
++
++ return res;
++ }
++
++ if (!od->is_cached) {
++ struct path lowerpath;
++ struct path upperpath;
++ struct ovl_readdir_data rdd = { .list = &od->cache };
++
++ ovl_path_lower(file->f_path.dentry, &lowerpath);
++ ovl_path_upper(file->f_path.dentry, &upperpath);
++
++ res = ovl_dir_read_merged(&upperpath, &lowerpath, &rdd);
++ if (res) {
++ ovl_cache_free(rdd.list);
++ return res;
++ }
++
++ od->cache_version = ovl_dentry_version_get(file->f_path.dentry);
++ od->is_cached = true;
++
++ ovl_seek_cursor(od, file->f_pos);
++ }
++
++ while (od->cursor.next != &od->cache) {
++ int over;
++ loff_t off;
++ struct ovl_cache_entry *p;
++
++ p = list_entry(od->cursor.next, struct ovl_cache_entry, l_node);
++ off = file->f_pos;
++ if (!p->is_whiteout) {
++ over = filler(buf, p->name, p->len, off, p->ino,
++ p->type);
++ if (over)
++ break;
++ }
++ file->f_pos++;
++ list_move(&od->cursor, &p->l_node);
++ }
++
++ return 0;
++}
++
++static loff_t ovl_dir_llseek(struct file *file, loff_t offset, int origin)
++{
++ loff_t res;
++ struct ovl_dir_file *od = file->private_data;
++
++ mutex_lock(&file_inode(file)->i_mutex);
++ if (!file->f_pos)
++ ovl_dir_reset(file);
++
++ if (od->is_real) {
++ res = vfs_llseek(od->realfile, offset, origin);
++ file->f_pos = od->realfile->f_pos;
++ } else {
++ res = -EINVAL;
++
++ switch (origin) {
++ case SEEK_CUR:
++ offset += file->f_pos;
++ break;
++ case SEEK_SET:
++ break;
++ default:
++ goto out_unlock;
++ }
++ if (offset < 0)
++ goto out_unlock;
++
++ if (offset != file->f_pos) {
++ file->f_pos = offset;
++ if (od->is_cached)
++ ovl_seek_cursor(od, offset);
++ }
++ res = offset;
++ }
++out_unlock:
++ mutex_unlock(&file_inode(file)->i_mutex);
++
++ return res;
++}
++
++static int ovl_dir_fsync(struct file *file, loff_t start, loff_t end,
++ int datasync)
++{
++ struct ovl_dir_file *od = file->private_data;
++
++ /* May need to reopen directory if it got copied up */
++ if (!od->realfile) {
++ struct path upperpath;
++
++ ovl_path_upper(file->f_path.dentry, &upperpath);
++ od->realfile = ovl_path_open(&upperpath, O_RDONLY);
++ if (IS_ERR(od->realfile))
++ return PTR_ERR(od->realfile);
++ }
++
++ return vfs_fsync_range(od->realfile, start, end, datasync);
++}
++
++static int ovl_dir_release(struct inode *inode, struct file *file)
++{
++ struct ovl_dir_file *od = file->private_data;
++
++ list_del(&od->cursor);
++ ovl_cache_free(&od->cache);
++ if (od->realfile)
++ fput(od->realfile);
++ kfree(od);
++
++ return 0;
++}
++
++static int ovl_dir_open(struct inode *inode, struct file *file)
++{
++ struct path realpath;
++ struct file *realfile;
++ struct ovl_dir_file *od;
++ enum ovl_path_type type;
++
++ od = kzalloc(sizeof(struct ovl_dir_file), GFP_KERNEL);
++ if (!od)
++ return -ENOMEM;
++
++ type = ovl_path_real(file->f_path.dentry, &realpath);
++ realfile = ovl_path_open(&realpath, file->f_flags);
++ if (IS_ERR(realfile)) {
++ kfree(od);
++ return PTR_ERR(realfile);
++ }
++ INIT_LIST_HEAD(&od->cache);
++ INIT_LIST_HEAD(&od->cursor);
++ od->is_cached = false;
++ od->realfile = realfile;
++ od->is_real = (type != OVL_PATH_MERGE);
++ file->private_data = od;
++
++ return 0;
++}
++
++const struct file_operations ovl_dir_operations = {
++ .read = generic_read_dir,
++ .open = ovl_dir_open,
++ .readdir = ovl_readdir,
++ .llseek = ovl_dir_llseek,
++ .fsync = ovl_dir_fsync,
++ .release = ovl_dir_release,
++};
++
++static int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list)
++{
++ int err;
++ struct path lowerpath;
++ struct path upperpath;
++ struct ovl_cache_entry *p;
++ struct ovl_readdir_data rdd = { .list = list };
++
++ ovl_path_upper(dentry, &upperpath);
++ ovl_path_lower(dentry, &lowerpath);
++
++ err = ovl_dir_read_merged(&upperpath, &lowerpath, &rdd);
++ if (err)
++ return err;
++
++ err = 0;
++
++ list_for_each_entry(p, list, l_node) {
++ if (p->is_whiteout)
++ continue;
++
++ if (p->name[0] == '.') {
++ if (p->len == 1)
++ continue;
++ if (p->len == 2 && p->name[1] == '.')
++ continue;
++ }
++ err = -ENOTEMPTY;
++ break;
++ }
++
++ return err;
++}
++
++static int ovl_remove_whiteouts(struct dentry *dir, struct list_head *list)
++{
++ struct path upperpath;
++ struct dentry *upperdir;
++ struct ovl_cache_entry *p;
++ const struct cred *old_cred;
++ struct cred *override_cred;
++ int err;
++
++ ovl_path_upper(dir, &upperpath);
++ upperdir = upperpath.dentry;
++
++ override_cred = prepare_creds();
++ if (!override_cred)
++ return -ENOMEM;
++
++ /*
++ * CAP_DAC_OVERRIDE for lookup and unlink
++ * CAP_SYS_ADMIN for setxattr of "trusted" namespace
++ * CAP_FOWNER for unlink in sticky directory
++ */
++ cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ cap_raise(override_cred->cap_effective, CAP_FOWNER);
++ old_cred = override_creds(override_cred);
++
++ err = vfs_setxattr(upperdir, ovl_opaque_xattr, "y", 1, 0);
++ if (err)
++ goto out_revert_creds;
++
++ mutex_lock_nested(&upperdir->d_inode->i_mutex, I_MUTEX_PARENT);
++ list_for_each_entry(p, list, l_node) {
++ struct dentry *dentry;
++ int ret;
++
++ if (!p->is_whiteout)
++ continue;
++
++ dentry = lookup_one_len(p->name, upperdir, p->len);
++ if (IS_ERR(dentry)) {
++ pr_warn(
++ "overlayfs: failed to lookup whiteout %.*s: %li\n",
++ p->len, p->name, PTR_ERR(dentry));
++ continue;
++ }
++ ret = vfs_unlink(upperdir->d_inode, dentry);
++ dput(dentry);
++ if (ret)
++ pr_warn(
++ "overlayfs: failed to unlink whiteout %.*s: %i\n",
++ p->len, p->name, ret);
++ }
++ mutex_unlock(&upperdir->d_inode->i_mutex);
++
++out_revert_creds:
++ revert_creds(old_cred);
++ put_cred(override_cred);
++
++ return err;
++}
++
++int ovl_check_empty_and_clear(struct dentry *dentry, enum ovl_path_type type)
++{
++ int err;
++ LIST_HEAD(list);
++
++ err = ovl_check_empty_dir(dentry, &list);
++ if (!err && type == OVL_PATH_MERGE)
++ err = ovl_remove_whiteouts(dentry, &list);
++
++ ovl_cache_free(&list);
++
++ return err;
++}
+diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
+new file mode 100644
+index 0000000..9473e79
+--- /dev/null
++++ b/fs/overlayfs/super.c
+@@ -0,0 +1,685 @@
++/*
++ *
++ * Copyright (C) 2011 Novell Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published by
++ * the Free Software Foundation.
++ */
++
++#include <linux/fs.h>
++#include <linux/namei.h>
++#include <linux/xattr.h>
++#include <linux/security.h>
++#include <linux/mount.h>
++#include <linux/slab.h>
++#include <linux/parser.h>
++#include <linux/module.h>
++#include <linux/cred.h>
++#include <linux/sched.h>
++#include <linux/statfs.h>
++#include <linux/seq_file.h>
++#include "overlayfs.h"
++
++MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
++MODULE_DESCRIPTION("Overlay filesystem");
++MODULE_LICENSE("GPL");
++
++#define OVERLAYFS_SUPER_MAGIC 0x794c764f
++
++struct ovl_config {
++ char *lowerdir;
++ char *upperdir;
++};
++
++/* private information held for overlayfs's superblock */
++struct ovl_fs {
++ struct vfsmount *upper_mnt;
++ struct vfsmount *lower_mnt;
++ long lower_namelen;
++ /* pathnames of lower and upper dirs, for show_options */
++ struct ovl_config config;
++};
++
++/* private information held for every overlayfs dentry */
++struct ovl_entry {
++ /*
++ * Keep "double reference" on upper dentries, so that
++ * d_delete() doesn't think it's OK to reset d_inode to NULL.
++ */
++ struct dentry *__upperdentry;
++ struct dentry *lowerdentry;
++ union {
++ struct {
++ u64 version;
++ bool opaque;
++ };
++ struct rcu_head rcu;
++ };
++};
++
++const char *ovl_whiteout_xattr = "trusted.overlay.whiteout";
++const char *ovl_opaque_xattr = "trusted.overlay.opaque";
++
++
++enum ovl_path_type ovl_path_type(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ if (oe->__upperdentry) {
++ if (oe->lowerdentry && S_ISDIR(dentry->d_inode->i_mode))
++ return OVL_PATH_MERGE;
++ else
++ return OVL_PATH_UPPER;
++ } else {
++ return OVL_PATH_LOWER;
++ }
++}
++
++static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe)
++{
++ struct dentry *upperdentry = ACCESS_ONCE(oe->__upperdentry);
++ smp_read_barrier_depends();
++ return upperdentry;
++}
++
++void ovl_path_upper(struct dentry *dentry, struct path *path)
++{
++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ path->mnt = ofs->upper_mnt;
++ path->dentry = ovl_upperdentry_dereference(oe);
++}
++
++void ovl_path_lower(struct dentry *dentry, struct path *path)
++{
++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ path->mnt = ofs->lower_mnt;
++ path->dentry = oe->lowerdentry;
++}
++
++enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path)
++{
++
++ enum ovl_path_type type = ovl_path_type(dentry);
++
++ if (type == OVL_PATH_LOWER)
++ ovl_path_lower(dentry, path);
++ else
++ ovl_path_upper(dentry, path);
++
++ return type;
++}
++
++struct dentry *ovl_dentry_upper(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ return ovl_upperdentry_dereference(oe);
++}
++
++struct dentry *ovl_dentry_lower(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ return oe->lowerdentry;
++}
++
++struct dentry *ovl_dentry_real(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++ struct dentry *realdentry;
++
++ realdentry = ovl_upperdentry_dereference(oe);
++ if (!realdentry)
++ realdentry = oe->lowerdentry;
++
++ return realdentry;
++}
++
++struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper)
++{
++ struct dentry *realdentry;
++
++ realdentry = ovl_upperdentry_dereference(oe);
++ if (realdentry) {
++ *is_upper = true;
++ } else {
++ realdentry = oe->lowerdentry;
++ *is_upper = false;
++ }
++ return realdentry;
++}
++
++bool ovl_dentry_is_opaque(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++ return oe->opaque;
++}
++
++void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++ oe->opaque = opaque;
++}
++
++void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ WARN_ON(!mutex_is_locked(&upperdentry->d_parent->d_inode->i_mutex));
++ WARN_ON(oe->__upperdentry);
++ BUG_ON(!upperdentry->d_inode);
++ smp_wmb();
++ oe->__upperdentry = dget(upperdentry);
++}
++
++void ovl_dentry_version_inc(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));
++ oe->version++;
++}
++
++u64 ovl_dentry_version_get(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));
++ return oe->version;
++}
++
++bool ovl_is_whiteout(struct dentry *dentry)
++{
++ int res;
++ char val;
++
++ if (!dentry)
++ return false;
++ if (!dentry->d_inode)
++ return false;
++ if (!S_ISLNK(dentry->d_inode->i_mode))
++ return false;
++
++ res = vfs_getxattr(dentry, ovl_whiteout_xattr, &val, 1);
++ if (res == 1 && val == 'y')
++ return true;
++
++ return false;
++}
++
++static bool ovl_is_opaquedir(struct dentry *dentry)
++{
++ int res;
++ char val;
++
++ if (!S_ISDIR(dentry->d_inode->i_mode))
++ return false;
++
++ res = vfs_getxattr(dentry, ovl_opaque_xattr, &val, 1);
++ if (res == 1 && val == 'y')
++ return true;
++
++ return false;
++}
++
++static void ovl_entry_free(struct rcu_head *head)
++{
++ struct ovl_entry *oe = container_of(head, struct ovl_entry, rcu);
++ kfree(oe);
++}
++
++static void ovl_dentry_release(struct dentry *dentry)
++{
++ struct ovl_entry *oe = dentry->d_fsdata;
++
++ if (oe) {
++ dput(oe->__upperdentry);
++ dput(oe->__upperdentry);
++ dput(oe->lowerdentry);
++ call_rcu(&oe->rcu, ovl_entry_free);
++ }
++}
++
++const struct dentry_operations ovl_dentry_operations = {
++ .d_release = ovl_dentry_release,
++};
++
++static struct ovl_entry *ovl_alloc_entry(void)
++{
++ return kzalloc(sizeof(struct ovl_entry), GFP_KERNEL);
++}
++
++static inline struct dentry *ovl_lookup_real(struct dentry *dir,
++ struct qstr *name)
++{
++ struct dentry *dentry;
++
++ mutex_lock(&dir->d_inode->i_mutex);
++ dentry = lookup_one_len(name->name, dir, name->len);
++ mutex_unlock(&dir->d_inode->i_mutex);
++
++ if (IS_ERR(dentry)) {
++ if (PTR_ERR(dentry) == -ENOENT)
++ dentry = NULL;
++ } else if (!dentry->d_inode) {
++ dput(dentry);
++ dentry = NULL;
++ }
++ return dentry;
++}
++
++static int ovl_do_lookup(struct dentry *dentry)
++{
++ struct ovl_entry *oe;
++ struct dentry *upperdir;
++ struct dentry *lowerdir;
++ struct dentry *upperdentry = NULL;
++ struct dentry *lowerdentry = NULL;
++ struct inode *inode = NULL;
++ int err;
++
++ err = -ENOMEM;
++ oe = ovl_alloc_entry();
++ if (!oe)
++ goto out;
++
++ upperdir = ovl_dentry_upper(dentry->d_parent);
++ lowerdir = ovl_dentry_lower(dentry->d_parent);
++
++ if (upperdir) {
++ upperdentry = ovl_lookup_real(upperdir, &dentry->d_name);
++ err = PTR_ERR(upperdentry);
++ if (IS_ERR(upperdentry))
++ goto out_put_dir;
++
++ if (lowerdir && upperdentry &&
++ (S_ISLNK(upperdentry->d_inode->i_mode) ||
++ S_ISDIR(upperdentry->d_inode->i_mode))) {
++ const struct cred *old_cred;
++ struct cred *override_cred;
++
++ err = -ENOMEM;
++ override_cred = prepare_creds();
++ if (!override_cred)
++ goto out_dput_upper;
++
++ /* CAP_SYS_ADMIN needed for getxattr */
++ cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
++ old_cred = override_creds(override_cred);
++
++ if (ovl_is_opaquedir(upperdentry)) {
++ oe->opaque = true;
++ } else if (ovl_is_whiteout(upperdentry)) {
++ dput(upperdentry);
++ upperdentry = NULL;
++ oe->opaque = true;
++ }
++ revert_creds(old_cred);
++ put_cred(override_cred);
++ }
++ }
++ if (lowerdir && !oe->opaque) {
++ lowerdentry = ovl_lookup_real(lowerdir, &dentry->d_name);
++ err = PTR_ERR(lowerdentry);
++ if (IS_ERR(lowerdentry))
++ goto out_dput_upper;
++ }
++
++ if (lowerdentry && upperdentry &&
++ (!S_ISDIR(upperdentry->d_inode->i_mode) ||
++ !S_ISDIR(lowerdentry->d_inode->i_mode))) {
++ dput(lowerdentry);
++ lowerdentry = NULL;
++ oe->opaque = true;
++ }
++
++ if (lowerdentry || upperdentry) {
++ struct dentry *realdentry;
++
++ realdentry = upperdentry ? upperdentry : lowerdentry;
++ err = -ENOMEM;
++ inode = ovl_new_inode(dentry->d_sb, realdentry->d_inode->i_mode,
++ oe);
++ if (!inode)
++ goto out_dput;
++ ovl_copyattr(realdentry->d_inode, inode);
++ }
++
++ if (upperdentry)
++ oe->__upperdentry = dget(upperdentry);
++
++ if (lowerdentry)
++ oe->lowerdentry = lowerdentry;
++
++ dentry->d_fsdata = oe;
++ dentry->d_op = &ovl_dentry_operations;
++ d_add(dentry, inode);
++
++ return 0;
++
++out_dput:
++ dput(lowerdentry);
++out_dput_upper:
++ dput(upperdentry);
++out_put_dir:
++ kfree(oe);
++out:
++ return err;
++}
++
++struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
++ unsigned int flags)
++{
++ int err = ovl_do_lookup(dentry);
++
++ if (err)
++ return ERR_PTR(err);
++
++ return NULL;
++}
++
++struct file *ovl_path_open(struct path *path, int flags)
++{
++ return dentry_open(path, flags, current_cred());
++}
++
++static void ovl_put_super(struct super_block *sb)
++{
++ struct ovl_fs *ufs = sb->s_fs_info;
++
++ if (!(sb->s_flags & MS_RDONLY))
++ mnt_drop_write(ufs->upper_mnt);
++
++ mntput(ufs->upper_mnt);
++ mntput(ufs->lower_mnt);
++
++ kfree(ufs->config.lowerdir);
++ kfree(ufs->config.upperdir);
++ kfree(ufs);
++}
++
++static int ovl_remount_fs(struct super_block *sb, int *flagsp, char *data)
++{
++ int flags = *flagsp;
++ struct ovl_fs *ufs = sb->s_fs_info;
++
++ /* When remounting rw or ro, we need to adjust the write access to the
++ * upper fs.
++ */
++ if (((flags ^ sb->s_flags) & MS_RDONLY) == 0)
++ /* No change to readonly status */
++ return 0;
++
++ if (flags & MS_RDONLY) {
++ mnt_drop_write(ufs->upper_mnt);
++ return 0;
++ } else
++ return mnt_want_write(ufs->upper_mnt);
++}
++
++/**
++ * ovl_statfs
++ * @sb: The overlayfs super block
++ * @buf: The struct kstatfs to fill in with stats
++ *
++ * Get the filesystem statistics. As writes always target the upper layer
++ * filesystem pass the statfs to the same filesystem.
++ */
++static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf)
++{
++ struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
++ struct dentry *root_dentry = dentry->d_sb->s_root;
++ struct path path;
++ int err;
++
++ ovl_path_upper(root_dentry, &path);
++
++ err = vfs_statfs(&path, buf);
++ if (!err) {
++ buf->f_namelen = max(buf->f_namelen, ofs->lower_namelen);
++ buf->f_type = OVERLAYFS_SUPER_MAGIC;
++ }
++
++ return err;
++}
++
++/**
++ * ovl_show_options
++ *
++ * Prints the mount options for a given superblock.
++ * Returns zero; does not fail.
++ */
++static int ovl_show_options(struct seq_file *m, struct dentry *dentry)
++{
++ struct super_block *sb = dentry->d_sb;
++ struct ovl_fs *ufs = sb->s_fs_info;
++
++ seq_printf(m, ",lowerdir=%s", ufs->config.lowerdir);
++ seq_printf(m, ",upperdir=%s", ufs->config.upperdir);
++ return 0;
++}
++
++static const struct super_operations ovl_super_operations = {
++ .put_super = ovl_put_super,
++ .remount_fs = ovl_remount_fs,
++ .statfs = ovl_statfs,
++ .show_options = ovl_show_options,
++};
++
++enum {
++ OPT_LOWERDIR,
++ OPT_UPPERDIR,
++ OPT_ERR,
++};
++
++static const match_table_t ovl_tokens = {
++ {OPT_LOWERDIR, "lowerdir=%s"},
++ {OPT_UPPERDIR, "upperdir=%s"},
++ {OPT_ERR, NULL}
++};
++
++static int ovl_parse_opt(char *opt, struct ovl_config *config)
++{
++ char *p;
++
++ config->upperdir = NULL;
++ config->lowerdir = NULL;
++
++ while ((p = strsep(&opt, ",")) != NULL) {
++ int token;
++ substring_t args[MAX_OPT_ARGS];
++
++ if (!*p)
++ continue;
++
++ token = match_token(p, ovl_tokens, args);
++ switch (token) {
++ case OPT_UPPERDIR:
++ kfree(config->upperdir);
++ config->upperdir = match_strdup(&args[0]);
++ if (!config->upperdir)
++ return -ENOMEM;
++ break;
++
++ case OPT_LOWERDIR:
++ kfree(config->lowerdir);
++ config->lowerdir = match_strdup(&args[0]);
++ if (!config->lowerdir)
++ return -ENOMEM;
++ break;
++
++ default:
++ return -EINVAL;
++ }
++ }
++ return 0;
++}
++
++static int ovl_fill_super(struct super_block *sb, void *data, int silent)
++{
++ struct path lowerpath;
++ struct path upperpath;
++ struct inode *root_inode;
++ struct dentry *root_dentry;
++ struct ovl_entry *oe;
++ struct ovl_fs *ufs;
++ struct kstatfs statfs;
++ int err;
++
++ err = -ENOMEM;
++ ufs = kmalloc(sizeof(struct ovl_fs), GFP_KERNEL);
++ if (!ufs)
++ goto out;
++
++ err = ovl_parse_opt((char *) data, &ufs->config);
++ if (err)
++ goto out_free_ufs;
++
++ err = -EINVAL;
++ if (!ufs->config.upperdir || !ufs->config.lowerdir) {
++ pr_err("overlayfs: missing upperdir or lowerdir\n");
++ goto out_free_config;
++ }
++
++ oe = ovl_alloc_entry();
++ if (oe == NULL)
++ goto out_free_config;
++
++ err = kern_path(ufs->config.upperdir, LOOKUP_FOLLOW, &upperpath);
++ if (err)
++ goto out_free_oe;
++
++ err = kern_path(ufs->config.lowerdir, LOOKUP_FOLLOW, &lowerpath);
++ if (err)
++ goto out_put_upperpath;
++
++ err = -ENOTDIR;
++ if (!S_ISDIR(upperpath.dentry->d_inode->i_mode) ||
++ !S_ISDIR(lowerpath.dentry->d_inode->i_mode))
++ goto out_put_lowerpath;
++
++ err = vfs_statfs(&lowerpath, &statfs);
++ if (err) {
++ pr_err("overlayfs: statfs failed on lowerpath\n");
++ goto out_put_lowerpath;
++ }
++ ufs->lower_namelen = statfs.f_namelen;
++
++ sb->s_stack_depth = max(upperpath.mnt->mnt_sb->s_stack_depth,
++ lowerpath.mnt->mnt_sb->s_stack_depth) + 1;
++
++ err = -EINVAL;
++ if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) {
++ pr_err("overlayfs: maximum fs stacking depth exceeded\n");
++ goto out_put_lowerpath;
++ }
++
++
++ ufs->upper_mnt = clone_private_mount(&upperpath);
++ err = PTR_ERR(ufs->upper_mnt);
++ if (IS_ERR(ufs->upper_mnt)) {
++ pr_err("overlayfs: failed to clone upperpath\n");
++ goto out_put_lowerpath;
++ }
++
++ ufs->lower_mnt = clone_private_mount(&lowerpath);
++ err = PTR_ERR(ufs->lower_mnt);
++ if (IS_ERR(ufs->lower_mnt)) {
++ pr_err("overlayfs: failed to clone lowerpath\n");
++ goto out_put_upper_mnt;
++ }
++
++ /*
++ * Make lower_mnt R/O. That way fchmod/fchown on lower file
++ * will fail instead of modifying lower fs.
++ */
++ ufs->lower_mnt->mnt_flags |= MNT_READONLY;
++
++ /* If the upper fs is r/o, we mark overlayfs r/o too */
++ if (ufs->upper_mnt->mnt_sb->s_flags & MS_RDONLY)
++ sb->s_flags |= MS_RDONLY;
++
++ if (!(sb->s_flags & MS_RDONLY)) {
++ err = mnt_want_write(ufs->upper_mnt);
++ if (err)
++ goto out_put_lower_mnt;
++ }
++
++ err = -ENOMEM;
++ root_inode = ovl_new_inode(sb, S_IFDIR, oe);
++ if (!root_inode)
++ goto out_drop_write;
++
++ root_dentry = d_make_root(root_inode);
++ if (!root_dentry)
++ goto out_drop_write;
++
++ mntput(upperpath.mnt);
++ mntput(lowerpath.mnt);
++
++ oe->__upperdentry = dget(upperpath.dentry);
++ oe->lowerdentry = lowerpath.dentry;
++
++ root_dentry->d_fsdata = oe;
++ root_dentry->d_op = &ovl_dentry_operations;
++
++ sb->s_magic = OVERLAYFS_SUPER_MAGIC;
++ sb->s_op = &ovl_super_operations;
++ sb->s_root = root_dentry;
++ sb->s_fs_info = ufs;
++
++ return 0;
++
++out_drop_write:
++ if (!(sb->s_flags & MS_RDONLY))
++ mnt_drop_write(ufs->upper_mnt);
++out_put_lower_mnt:
++ mntput(ufs->lower_mnt);
++out_put_upper_mnt:
++ mntput(ufs->upper_mnt);
++out_put_lowerpath:
++ path_put(&lowerpath);
++out_put_upperpath:
++ path_put(&upperpath);
++out_free_oe:
++ kfree(oe);
++out_free_config:
++ kfree(ufs->config.lowerdir);
++ kfree(ufs->config.upperdir);
++out_free_ufs:
++ kfree(ufs);
++out:
++ return err;
++}
++
++static struct dentry *ovl_mount(struct file_system_type *fs_type, int flags,
++ const char *dev_name, void *raw_data)
++{
++ return mount_nodev(fs_type, flags, raw_data, ovl_fill_super);
++}
++
++static struct file_system_type ovl_fs_type = {
++ .owner = THIS_MODULE,
++ .name = "overlayfs",
++ .mount = ovl_mount,
++ .kill_sb = kill_anon_super,
++};
++MODULE_ALIAS_FS("overlayfs");
++
++static int __init ovl_init(void)
++{
++ return register_filesystem(&ovl_fs_type);
++}
++
++static void __exit ovl_exit(void)
++{
++ unregister_filesystem(&ovl_fs_type);
++}
++
++module_init(ovl_init);
++module_exit(ovl_exit);
+diff --git a/fs/splice.c b/fs/splice.c
+index 9eca476..8d415fc 100644
+--- a/fs/splice.c
++++ b/fs/splice.c
+@@ -1312,6 +1312,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
+
+ return ret;
+ }
++EXPORT_SYMBOL(do_splice_direct);
+
+ static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
+ struct pipe_inode_info *opipe,
+diff --git a/include/linux/fs.h b/include/linux/fs.h
+index 65c2be2..72d04f8 100644
+--- a/include/linux/fs.h
++++ b/include/linux/fs.h
+@@ -244,6 +244,12 @@ struct iattr {
+ */
+ #include <linux/quota.h>
+
++/*
++ * Maximum number of layers of fs stack. Needs to be limited to
++ * prevent kernel stack overflow
++ */
++#define FILESYSTEM_MAX_STACK_DEPTH 2
++
+ /**
+ * enum positive_aop_returns - aop return codes with specific semantics
+ *
+@@ -1322,6 +1328,11 @@ struct super_block {
+
+ /* Being remounted read-only */
+ int s_readonly_remount;
++
++ /*
++ * Indicates how deep in a filesystem stack this SB is
++ */
++ int s_stack_depth;
+ };
+
+ /* superblock cache pruning functions */
+@@ -1575,6 +1586,7 @@ struct inode_operations {
+ int (*atomic_open)(struct inode *, struct dentry *,
+ struct file *, unsigned open_flag,
+ umode_t create_mode, int *opened);
++ int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
+ } ____cacheline_aligned;
+
+ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
+@@ -2008,6 +2020,7 @@ extern struct file *file_open_name(struct filename *, int, umode_t);
+ extern struct file *filp_open(const char *, int, umode_t);
+ extern struct file *file_open_root(struct dentry *, struct vfsmount *,
+ const char *, int);
++extern int vfs_open(const struct path *, struct file *, const struct cred *);
+ extern struct file * dentry_open(const struct path *, int, const struct cred *);
+ extern int filp_close(struct file *, fl_owner_t id);
+
+@@ -2208,6 +2221,7 @@ extern sector_t bmap(struct inode *, sector_t);
+ #endif
+ extern int notify_change(struct dentry *, struct iattr *);
+ extern int inode_permission(struct inode *, int);
++extern int __inode_permission(struct inode *, int);
+ extern int generic_permission(struct inode *, int);
+
+ static inline bool execute_ok(struct inode *inode)
+@@ -2414,6 +2428,9 @@ extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
+ struct file *, loff_t *, size_t, unsigned int);
+ extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
+ struct file *out, loff_t *, size_t len, unsigned int flags);
++extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
++ loff_t *opos, size_t len, unsigned int flags);
++
+
+ extern void
+ file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
+diff --git a/include/linux/mount.h b/include/linux/mount.h
+index 73005f9..435f281 100644
+--- a/include/linux/mount.h
++++ b/include/linux/mount.h
+@@ -68,6 +68,9 @@ extern void mnt_pin(struct vfsmount *mnt);
+ extern void mnt_unpin(struct vfsmount *mnt);
+ extern int __mnt_is_readonly(struct vfsmount *mnt);
+
++struct path;
++extern struct vfsmount *clone_private_mount(struct path *path);
++
+ struct file_system_type;
+ extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
+ int flags, const char *name,
diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config
index bc27ee77..de52a988 100644
--- a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config
+++ b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config
@@ -1217,6 +1217,7 @@ CONFIG_INOTIFY_USER=y
CONFIG_AUTOFS4_FS=m
CONFIG_FUSE_FS=y
# CONFIG_CUSE is not set
+CONFIG_OVERLAYFS_FS=y
#
# Caches
@@ -1279,7 +1280,7 @@ CONFIG_JFFS2_CMODE_FAVOURLZO=y
CONFIG_CRAMFS=y
CONFIG_SQUASHFS=y
# CONFIG_SQUASHFS_XATTR is not set
-# CONFIG_SQUASHFS_ZLIB is not set
+CONFIG_SQUASHFS_ZLIB=y
# CONFIG_SQUASHFS_LZO is not set
CONFIG_SQUASHFS_XZ=y
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
diff --git a/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original
new file mode 100644
index 00000000..e73de2c6
--- /dev/null
+++ b/br-ext-chip-xiongmai/board/xm530/kernel/xm530.generic.config.original
@@ -0,0 +1,1637 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Linux/arm 3.10.103 Kernel Configuration
+#
+CONFIG_ARM=y
+CONFIG_MIGHT_HAVE_PCI=y
+CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_HAVE_PROC_CPU=y
+CONFIG_STACKTRACE_SUPPORT=y
+CONFIG_LOCKDEP_SUPPORT=y
+CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
+CONFIG_ARCH_HAS_CPUFREQ=y
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_VECTORS_BASE=0xffff0000
+CONFIG_ARM_PATCH_PHYS_VIRT=y
+CONFIG_NEED_MACH_IO_H=y
+CONFIG_NEED_MACH_MEMORY_H=y
+CONFIG_GENERIC_BUG=y
+CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
+CONFIG_IRQ_WORK=y
+CONFIG_BUILDTIME_EXTABLE_SORT=y
+
+#
+# General setup
+#
+CONFIG_INIT_ENV_ARG_LIMIT=32
+CONFIG_CROSS_COMPILE=""
+CONFIG_LOCALVERSION=""
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_LZMA=y
+CONFIG_HAVE_KERNEL_XZ=y
+CONFIG_HAVE_KERNEL_LZO=y
+# CONFIG_KERNEL_GZIP is not set
+# CONFIG_KERNEL_LZMA is not set
+CONFIG_KERNEL_XZ=y
+# CONFIG_KERNEL_LZO is not set
+CONFIG_DEFAULT_HOSTNAME="(none)"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_SYSVIPC_SYSCTL=y
+# CONFIG_POSIX_MQUEUE is not set
+# CONFIG_FHANDLE is not set
+# CONFIG_AUDIT is not set
+CONFIG_HAVE_GENERIC_HARDIRQS=y
+
+#
+# IRQ subsystem
+#
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_GENERIC_IRQ_PROBE=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_KTIME_SCALAR=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_ARCH_HAS_TICK_BROADCAST=y
+CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
+
+#
+# Timers subsystem
+#
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ_COMMON=y
+# CONFIG_HZ_PERIODIC is not set
+CONFIG_NO_HZ_IDLE=y
+# CONFIG_NO_HZ is not set
+# CONFIG_HIGH_RES_TIMERS is not set
+
+#
+# CPU/Task time and stats accounting
+#
+CONFIG_TICK_CPU_ACCOUNTING=y
+# CONFIG_IRQ_TIME_ACCOUNTING is not set
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_TASKSTATS=y
+# CONFIG_TASK_DELAY_ACCT is not set
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+
+#
+# RCU Subsystem
+#
+CONFIG_TREE_RCU=y
+# CONFIG_PREEMPT_RCU is not set
+CONFIG_RCU_STALL_COMMON=y
+# CONFIG_RCU_USER_QS is not set
+CONFIG_RCU_FANOUT=32
+CONFIG_RCU_FANOUT_LEAF=16
+# CONFIG_RCU_FANOUT_EXACT is not set
+# CONFIG_RCU_FAST_NO_HZ is not set
+# CONFIG_TREE_RCU_TRACE is not set
+# CONFIG_RCU_NOCB_CPU is not set
+# CONFIG_IKCONFIG is not set
+CONFIG_LOG_BUF_SHIFT=14
+# CONFIG_CGROUPS is not set
+# CONFIG_CHECKPOINT_RESTORE is not set
+# CONFIG_NAMESPACES is not set
+CONFIG_UIDGID_CONVERTED=y
+# CONFIG_UIDGID_STRICT_TYPE_CHECKS is not set
+# CONFIG_SCHED_AUTOGROUP is not set
+# CONFIG_SYSFS_DEPRECATED is not set
+# CONFIG_RELAY is not set
+# CONFIG_BLK_DEV_INITRD is not set
+# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
+CONFIG_SYSCTL=y
+CONFIG_ANON_INODES=y
+CONFIG_HAVE_UID16=y
+CONFIG_HOTPLUG=y
+CONFIG_EXPERT=y
+CONFIG_UID16=y
+CONFIG_SYSCTL_SYSCALL=y
+# CONFIG_KALLSYMS is not set
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+# CONFIG_ELF_CORE is not set
+CONFIG_BASE_FULL=y
+CONFIG_FUTEX=y
+CONFIG_EPOLL=y
+CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
+CONFIG_EVENTFD=y
+CONFIG_SHMEM=y
+# CONFIG_AIO is not set
+# CONFIG_EMBEDDED is not set
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_PERF_USE_VMALLOC=y
+
+#
+# Kernel Performance Events And Counters
+#
+# CONFIG_PERF_EVENTS is not set
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLAB is not set
+CONFIG_SLUB=y
+# CONFIG_SLOB is not set
+# CONFIG_PROFILING is not set
+CONFIG_HAVE_OPROFILE=y
+# CONFIG_KPROBES is not set
+# CONFIG_JUMP_LABEL is not set
+# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
+CONFIG_HAVE_KPROBES=y
+CONFIG_HAVE_KRETPROBES=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_DMA_ATTRS=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
+CONFIG_USE_GENERIC_SMP_HELPERS=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_IDLE_POLL_SETUP=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_CLK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_MODULES_USE_ELF_REL=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_OLD_SIGSUSPEND3=y
+CONFIG_OLD_SIGACTION=y
+
+#
+# GCOV-based kernel profiling
+#
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_RT_MUTEXES=y
+CONFIG_BASE_SMALL=0
+CONFIG_MODULES=y
+# CONFIG_MODULE_FORCE_LOAD is not set
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_MODULE_FORCE_UNLOAD is not set
+# CONFIG_MODVERSIONS is not set
+# CONFIG_MODULE_SRCVERSION_ALL is not set
+# CONFIG_MODULE_SIG is not set
+CONFIG_STOP_MACHINE=y
+CONFIG_BLOCK=y
+# CONFIG_LBDAF is not set
+CONFIG_BLK_DEV_BSG=y
+# CONFIG_BLK_DEV_BSGLIB is not set
+# CONFIG_BLK_DEV_INTEGRITY is not set
+
+#
+# Partition Types
+#
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_ACORN_PARTITION is not set
+# CONFIG_OSF_PARTITION is not set
+# CONFIG_AMIGA_PARTITION is not set
+# CONFIG_ATARI_PARTITION is not set
+# CONFIG_MAC_PARTITION is not set
+CONFIG_MSDOS_PARTITION=y
+# CONFIG_BSD_DISKLABEL is not set
+# CONFIG_MINIX_SUBPARTITION is not set
+# CONFIG_SOLARIS_X86_PARTITION is not set
+# CONFIG_UNIXWARE_DISKLABEL is not set
+# CONFIG_LDM_PARTITION is not set
+# CONFIG_SGI_PARTITION is not set
+# CONFIG_ULTRIX_PARTITION is not set
+# CONFIG_SUN_PARTITION is not set
+# CONFIG_KARMA_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+# CONFIG_SYSV68_PARTITION is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+CONFIG_IOSCHED_DEADLINE=y
+CONFIG_IOSCHED_CFQ=y
+CONFIG_DEFAULT_DEADLINE=y
+# CONFIG_DEFAULT_CFQ is not set
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="deadline"
+CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
+CONFIG_INLINE_READ_UNLOCK=y
+CONFIG_INLINE_READ_UNLOCK_IRQ=y
+CONFIG_INLINE_WRITE_UNLOCK=y
+CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
+CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
+CONFIG_MUTEX_SPIN_ON_OWNER=y
+CONFIG_FREEZER=y
+
+#
+# System Type
+#
+CONFIG_MMU=y
+# CONFIG_ARCH_MULTIPLATFORM is not set
+# CONFIG_ARCH_INTEGRATOR is not set
+# CONFIG_ARCH_REALVIEW is not set
+# CONFIG_ARCH_VERSATILE is not set
+# CONFIG_ARCH_AT91 is not set
+# CONFIG_ARCH_CLPS711X is not set
+# CONFIG_ARCH_GEMINI is not set
+# CONFIG_ARCH_EBSA110 is not set
+# CONFIG_ARCH_EP93XX is not set
+# CONFIG_ARCH_FOOTBRIDGE is not set
+# CONFIG_ARCH_NETX is not set
+# CONFIG_ARCH_IOP13XX is not set
+# CONFIG_ARCH_IOP32X is not set
+# CONFIG_ARCH_IOP33X is not set
+# CONFIG_ARCH_IXP4XX is not set
+# CONFIG_ARCH_DOVE is not set
+# CONFIG_ARCH_KIRKWOOD is not set
+# CONFIG_ARCH_MV78XX0 is not set
+# CONFIG_ARCH_ORION5X is not set
+# CONFIG_ARCH_MMP is not set
+# CONFIG_ARCH_KS8695 is not set
+# CONFIG_ARCH_W90X900 is not set
+# CONFIG_ARCH_LPC32XX is not set
+# CONFIG_ARCH_PXA is not set
+# CONFIG_ARCH_MSM is not set
+# CONFIG_ARCH_SHMOBILE is not set
+# CONFIG_ARCH_RPC is not set
+# CONFIG_ARCH_SA1100 is not set
+# CONFIG_ARCH_S3C24XX is not set
+# CONFIG_ARCH_S3C64XX is not set
+# CONFIG_ARCH_S5P64X0 is not set
+# CONFIG_ARCH_S5PC100 is not set
+# CONFIG_ARCH_S5PV210 is not set
+# CONFIG_ARCH_EXYNOS is not set
+# CONFIG_ARCH_SHARK is not set
+# CONFIG_ARCH_U300 is not set
+# CONFIG_ARCH_DAVINCI is not set
+# CONFIG_ARCH_OMAP1 is not set
+CONFIG_ARCH_XM530=y
+# CONFIG_ARCH_XM580 is not set
+# CONFIG_PLAT_SPEAR is not set
+
+#
+# xm530 board feature
+#
+CONFIG_MACH_XM530=y
+CONFIG_DEFAULT_BUSCLK=50000000
+CONFIG_ARM_TIMER_SP804=y
+
+#
+# Processor Type
+#
+CONFIG_CPU_V7=y
+CONFIG_CPU_32v6K=y
+CONFIG_CPU_32v7=y
+CONFIG_CPU_ABRT_EV7=y
+CONFIG_CPU_PABRT_V7=y
+CONFIG_CPU_CACHE_V7=y
+CONFIG_CPU_CACHE_VIPT=y
+CONFIG_CPU_COPY_V6=y
+CONFIG_CPU_TLB_V7=y
+CONFIG_CPU_HAS_ASID=y
+CONFIG_CPU_CP15=y
+CONFIG_CPU_CP15_MMU=y
+
+#
+# Processor Features
+#
+# CONFIG_ARM_LPAE is not set
+# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
+CONFIG_ARM_THUMB=y
+# CONFIG_ARM_THUMBEE is not set
+CONFIG_ARM_VIRT_EXT=y
+# CONFIG_SWP_EMULATE is not set
+# CONFIG_CPU_ICACHE_DISABLE is not set
+# CONFIG_CPU_DCACHE_DISABLE is not set
+# CONFIG_CPU_BPREDICT_DISABLE is not set
+CONFIG_KUSER_HELPERS=y
+CONFIG_OUTER_CACHE=y
+CONFIG_OUTER_CACHE_SYNC=y
+CONFIG_MIGHT_HAVE_CACHE_L2X0=y
+CONFIG_CACHE_L2X0=y
+CONFIG_CACHE_PL310=y
+CONFIG_ARM_L1_CACHE_SHIFT_6=y
+CONFIG_ARM_L1_CACHE_SHIFT=6
+CONFIG_ARM_DMA_MEM_BUFFERABLE=y
+CONFIG_ARM_NR_BANKS=8
+CONFIG_MULTI_IRQ_HANDLER=y
+# CONFIG_ARM_ERRATA_430973 is not set
+# CONFIG_ARM_ERRATA_458693 is not set
+# CONFIG_ARM_ERRATA_460075 is not set
+# CONFIG_ARM_ERRATA_742230 is not set
+# CONFIG_ARM_ERRATA_742231 is not set
+# CONFIG_PL310_ERRATA_588369 is not set
+# CONFIG_ARM_ERRATA_643719 is not set
+# CONFIG_ARM_ERRATA_720789 is not set
+# CONFIG_PL310_ERRATA_727915 is not set
+# CONFIG_ARM_ERRATA_743622 is not set
+# CONFIG_ARM_ERRATA_751472 is not set
+# CONFIG_PL310_ERRATA_753970 is not set
+# CONFIG_ARM_ERRATA_754322 is not set
+# CONFIG_ARM_ERRATA_754327 is not set
+# CONFIG_ARM_ERRATA_764369 is not set
+# CONFIG_PL310_ERRATA_769419 is not set
+# CONFIG_ARM_ERRATA_775420 is not set
+# CONFIG_ARM_ERRATA_798181 is not set
+
+#
+# Bus support
+#
+CONFIG_ARM_AMBA=y
+# CONFIG_PCI is not set
+# CONFIG_PCI_SYSCALL is not set
+# CONFIG_PCCARD is not set
+
+#
+# Kernel Features
+#
+CONFIG_HAVE_SMP=y
+CONFIG_SMP=y
+CONFIG_SMP_ON_UP=y
+# CONFIG_ARM_CPU_TOPOLOGY is not set
+CONFIG_HAVE_ARM_SCU=y
+# CONFIG_HAVE_ARM_ARCH_TIMER is not set
+CONFIG_HAVE_ARM_TWD=y
+# CONFIG_MCPM is not set
+CONFIG_VMSPLIT_3G=y
+# CONFIG_VMSPLIT_2G is not set
+# CONFIG_VMSPLIT_1G is not set
+CONFIG_PAGE_OFFSET=0xC0000000
+CONFIG_NR_CPUS=2
+CONFIG_HOTPLUG_CPU=y
+# CONFIG_ARM_PSCI is not set
+CONFIG_LOCAL_TIMERS=y
+CONFIG_ARCH_NR_GPIO=0
+CONFIG_PREEMPT_NONE=y
+# CONFIG_PREEMPT_VOLUNTARY is not set
+# CONFIG_PREEMPT is not set
+CONFIG_HZ=100
+# CONFIG_SCHED_HRTICK is not set
+# CONFIG_THUMB2_KERNEL is not set
+CONFIG_AEABI=y
+CONFIG_OABI_COMPAT=y
+# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
+# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
+CONFIG_HAVE_ARCH_PFN_VALID=y
+# CONFIG_HIGHMEM is not set
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+CONFIG_HAVE_MEMBLOCK=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_COMPACTION is not set
+# CONFIG_PHYS_ADDR_T_64BIT is not set
+CONFIG_ZONE_DMA_FLAG=0
+# CONFIG_KSM is not set
+CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+CONFIG_CROSS_MEMORY_ATTACH=y
+# CONFIG_CLEANCACHE is not set
+CONFIG_FORCE_MAX_ZONEORDER=11
+CONFIG_ALIGNMENT_TRAP=y
+# CONFIG_UACCESS_WITH_MEMCPY is not set
+# CONFIG_SECCOMP is not set
+# CONFIG_CC_STACKPROTECTOR is not set
+
+#
+# Boot options
+#
+# CONFIG_USE_OF is not set
+CONFIG_ATAGS=y
+# CONFIG_DEPRECATED_PARAM_STRUCT is not set
+CONFIG_ZBOOT_ROM_TEXT=0x0
+CONFIG_ZBOOT_ROM_BSS=0x0
+CONFIG_CMDLINE="mem=128M console=ttyAMA0,115200 console=ttyMTD,blackbox"
+CONFIG_CMDLINE_FROM_BOOTLOADER=y
+# CONFIG_CMDLINE_EXTEND is not set
+# CONFIG_CMDLINE_FORCE is not set
+# CONFIG_XIP_KERNEL is not set
+# CONFIG_KEXEC is not set
+# CONFIG_CRASH_DUMP is not set
+# CONFIG_AUTO_ZRELADDR is not set
+
+#
+# CPU Power Management
+#
+
+#
+# CPU Frequency scaling
+#
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_TABLE=y
+CONFIG_CPU_FREQ_GOV_COMMON=y
+CONFIG_CPU_FREQ_STAT=y
+CONFIG_CPU_FREQ_STAT_DETAILS=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+CONFIG_CPU_FREQ_GOV_POWERSAVE=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_CPU_FREQ_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
+
+#
+# ARM CPU frequency scaling drivers
+#
+# CONFIG_ARM_EXYNOS4210_CPUFREQ is not set
+# CONFIG_ARM_EXYNOS4X12_CPUFREQ is not set
+# CONFIG_ARM_EXYNOS5250_CPUFREQ is not set
+# CONFIG_ARM_KIRKWOOD_CPUFREQ is not set
+# CONFIG_CPU_IDLE is not set
+# CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED is not set
+
+#
+# Floating point emulation
+#
+
+#
+# At least one emulation must be selected
+#
+# CONFIG_FPE_NWFPE is not set
+# CONFIG_FPE_FASTFPE is not set
+CONFIG_VFP=y
+CONFIG_VFPv3=y
+CONFIG_NEON=y
+
+#
+# Userspace binary formats
+#
+CONFIG_BINFMT_ELF=y
+CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y
+CONFIG_BINFMT_SCRIPT=y
+# CONFIG_HAVE_AOUT is not set
+# CONFIG_BINFMT_MISC is not set
+CONFIG_COREDUMP=y
+
+#
+# Power management options
+#
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
+CONFIG_PM_SLEEP=y
+CONFIG_PM_SLEEP_SMP=y
+# CONFIG_PM_AUTOSLEEP is not set
+# CONFIG_PM_WAKELOCKS is not set
+# CONFIG_PM_RUNTIME is not set
+CONFIG_PM=y
+# CONFIG_PM_DEBUG is not set
+# CONFIG_APM_EMULATION is not set
+CONFIG_PM_CLK=y
+CONFIG_CPU_PM=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARM_CPU_SUSPEND=y
+CONFIG_NET=y
+
+#
+# Networking options
+#
+CONFIG_PACKET=y
+# CONFIG_PACKET_DIAG is not set
+CONFIG_UNIX=y
+# CONFIG_UNIX_DIAG is not set
+CONFIG_XFRM=y
+# CONFIG_XFRM_USER is not set
+# CONFIG_XFRM_SUB_POLICY is not set
+# CONFIG_XFRM_MIGRATE is not set
+# CONFIG_XFRM_STATISTICS is not set
+# CONFIG_NET_KEY is not set
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+# CONFIG_IP_ADVANCED_ROUTER is not set
+# CONFIG_IP_PNP is not set
+# CONFIG_NET_IPIP is not set
+# CONFIG_NET_IPGRE_DEMUX is not set
+# CONFIG_NET_IP_TUNNEL is not set
+# CONFIG_IP_MROUTE is not set
+# CONFIG_ARPD is not set
+# CONFIG_SYN_COOKIES is not set
+# CONFIG_NET_IPVTI is not set
+# CONFIG_INET_AH is not set
+# CONFIG_INET_ESP is not set
+# CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
+# CONFIG_INET_TUNNEL is not set
+CONFIG_INET_XFRM_MODE_TRANSPORT=y
+CONFIG_INET_XFRM_MODE_TUNNEL=y
+CONFIG_INET_XFRM_MODE_BEET=y
+CONFIG_INET_LRO=y
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+# CONFIG_INET_UDP_DIAG is not set
+# CONFIG_TCP_CONG_ADVANCED is not set
+CONFIG_TCP_CONG_CUBIC=y
+CONFIG_DEFAULT_TCP_CONG="cubic"
+# CONFIG_TCP_MD5SIG is not set
+# CONFIG_IPV6 is not set
+# CONFIG_NETWORK_SECMARK is not set
+# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
+# CONFIG_NETFILTER is not set
+# CONFIG_IP_DCCP is not set
+# CONFIG_IP_SCTP is not set
+# CONFIG_RDS is not set
+# CONFIG_TIPC is not set
+# CONFIG_ATM is not set
+# CONFIG_L2TP is not set
+# CONFIG_BRIDGE is not set
+CONFIG_HAVE_NET_DSA=y
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_DECNET is not set
+# CONFIG_LLC2 is not set
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_PHONET is not set
+# CONFIG_IEEE802154 is not set
+# CONFIG_NET_SCHED is not set
+# CONFIG_DCB is not set
+CONFIG_DNS_RESOLVER=y
+# CONFIG_BATMAN_ADV is not set
+# CONFIG_OPENVSWITCH is not set
+# CONFIG_VSOCKETS is not set
+# CONFIG_NETLINK_MMAP is not set
+# CONFIG_NETLINK_DIAG is not set
+CONFIG_RPS=y
+CONFIG_RFS_ACCEL=y
+CONFIG_XPS=y
+CONFIG_BQL=y
+# CONFIG_BPF_JIT is not set
+
+#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
+# CONFIG_AF_RXRPC is not set
+CONFIG_WIRELESS=y
+CONFIG_CFG80211=m
+# CONFIG_NL80211_TESTMODE is not set
+# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
+# CONFIG_CFG80211_REG_DEBUG is not set
+# CONFIG_CFG80211_CERTIFICATION_ONUS is not set
+CONFIG_CFG80211_DEFAULT_PS=y
+# CONFIG_CFG80211_INTERNAL_REGDB is not set
+# CONFIG_CFG80211_WEXT is not set
+# CONFIG_LIB80211 is not set
+# CONFIG_MAC80211 is not set
+# CONFIG_WIMAX is not set
+# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
+# CONFIG_CAIF is not set
+# CONFIG_CEPH_LIB is not set
+# CONFIG_NFC is not set
+CONFIG_HAVE_BPF_JIT=y
+
+#
+# Device Drivers
+#
+
+#
+# Generic Driver Options
+#
+CONFIG_UEVENT_HELPER_PATH="/sbin/mdev"
+# CONFIG_DEVTMPFS is not set
+CONFIG_STANDALONE=y
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+CONFIG_FW_LOADER=y
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_EXTRA_FIRMWARE=""
+CONFIG_FW_LOADER_USER_HELPER=y
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_SYS_HYPERVISOR is not set
+# CONFIG_GENERIC_CPU_DEVICES is not set
+CONFIG_DMA_SHARED_BUFFER=y
+# CONFIG_CMA is not set
+
+#
+# Bus devices
+#
+# CONFIG_CONNECTOR is not set
+CONFIG_MTD=y
+# CONFIG_MTD_TESTS is not set
+# CONFIG_MTD_REDBOOT_PARTS is not set
+CONFIG_MTD_CMDLINE_PARTS=y
+# CONFIG_MTD_AFS_PARTS is not set
+# CONFIG_MTD_AR7_PARTS is not set
+
+#
+# User Modules And Translation Layers
+#
+CONFIG_MTD_BLKDEVS=y
+CONFIG_MTD_BLOCK=y
+# CONFIG_FTL is not set
+# CONFIG_NFTL is not set
+# CONFIG_INFTL is not set
+# CONFIG_RFD_FTL is not set
+# CONFIG_SSFDC is not set
+# CONFIG_SM_FTL is not set
+# CONFIG_MTD_OOPS is not set
+
+#
+# RAM/ROM/Flash chip drivers
+#
+# CONFIG_MTD_CFI is not set
+# CONFIG_MTD_JEDECPROBE is not set
+CONFIG_MTD_MAP_BANK_WIDTH_1=y
+CONFIG_MTD_MAP_BANK_WIDTH_2=y
+CONFIG_MTD_MAP_BANK_WIDTH_4=y
+# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
+CONFIG_MTD_CFI_I1=y
+CONFIG_MTD_CFI_I2=y
+# CONFIG_MTD_CFI_I4 is not set
+# CONFIG_MTD_CFI_I8 is not set
+# CONFIG_MTD_RAM is not set
+# CONFIG_MTD_ROM is not set
+# CONFIG_MTD_ABSENT is not set
+
+#
+# Mapping drivers for chip access
+#
+# CONFIG_MTD_COMPLEX_MAPPINGS is not set
+# CONFIG_MTD_PLATRAM is not set
+
+#
+# Self-contained MTD device drivers
+#
+# CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_PHRAM is not set
+# CONFIG_MTD_MTDRAM is not set
+CONFIG_MTD_BLOCK2MTD=y
+
+#
+# Disk-On-Chip Device Drivers
+#
+# CONFIG_MTD_DOCG3 is not set
+CONFIG_MTD_XMSFC=y
+# CONFIG_MTD_NAND is not set
+# CONFIG_MTD_ONENAND is not set
+
+#
+# LPDDR flash memory drivers
+#
+# CONFIG_MTD_LPDDR is not set
+# CONFIG_MTD_UBI is not set
+# CONFIG_PARPORT is not set
+CONFIG_BLK_DEV=y
+# CONFIG_BLK_DEV_COW_COMMON is not set
+# CONFIG_BLK_DEV_LOOP is not set
+# CONFIG_BLK_DEV_DRBD is not set
+# CONFIG_BLK_DEV_NBD is not set
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=16
+CONFIG_BLK_DEV_RAM_SIZE=65536
+# CONFIG_BLK_DEV_XIP is not set
+# CONFIG_CDROM_PKTCDVD is not set
+# CONFIG_ATA_OVER_ETH is not set
+# CONFIG_BLK_DEV_RBD is not set
+
+#
+# Misc devices
+#
+# CONFIG_ATMEL_PWM is not set
+# CONFIG_DUMMY_IRQ is not set
+# CONFIG_ATMEL_SSC is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_SRAM is not set
+# CONFIG_C2PORT is not set
+
+#
+# EEPROM support
+#
+# CONFIG_EEPROM_93CX6 is not set
+
+#
+# Texas Instruments shared transport line discipline
+#
+
+#
+# Altera FPGA firmware download module
+#
+
+#
+# SCSI device support
+#
+CONFIG_SCSI_MOD=y
+# CONFIG_RAID_ATTRS is not set
+# CONFIG_SCSI is not set
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SCSI_NETLINK is not set
+# CONFIG_ATA is not set
+# CONFIG_MD is not set
+CONFIG_NETDEVICES=y
+CONFIG_NET_CORE=y
+# CONFIG_BONDING is not set
+# CONFIG_DUMMY is not set
+# CONFIG_EQUALIZER is not set
+CONFIG_MII=y
+# CONFIG_NET_TEAM is not set
+# CONFIG_MACVLAN is not set
+# CONFIG_VXLAN is not set
+# CONFIG_NETCONSOLE is not set
+# CONFIG_NETPOLL is not set
+# CONFIG_NET_POLL_CONTROLLER is not set
+# CONFIG_TUN is not set
+# CONFIG_VETH is not set
+
+#
+# CAIF transport drivers
+#
+
+#
+# Distributed Switch Architecture drivers
+#
+# CONFIG_NET_DSA_MV88E6XXX is not set
+# CONFIG_NET_DSA_MV88E6060 is not set
+# CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set
+# CONFIG_NET_DSA_MV88E6131 is not set
+# CONFIG_NET_DSA_MV88E6123_61_65 is not set
+CONFIG_ETHERNET=y
+CONFIG_NET_CADENCE=y
+# CONFIG_ARM_AT91_ETHER is not set
+# CONFIG_MACB is not set
+CONFIG_NET_VENDOR_BROADCOM=y
+# CONFIG_B44 is not set
+# CONFIG_NET_CALXEDA_XGMAC is not set
+CONFIG_NET_VENDOR_CIRRUS=y
+# CONFIG_CS89x0 is not set
+# CONFIG_DM9000 is not set
+# CONFIG_DNET is not set
+CONFIG_NET_VENDOR_FARADAY=y
+# CONFIG_FTMAC100 is not set
+# CONFIG_FTGMAC100 is not set
+CONFIG_NET_VENDOR_INTEL=y
+CONFIG_NET_VENDOR_I825XX=y
+CONFIG_NET_VENDOR_MARVELL=y
+# CONFIG_MVMDIO is not set
+CONFIG_NET_VENDOR_MICREL=y
+# CONFIG_KS8842 is not set
+# CONFIG_KS8851_MLL is not set
+CONFIG_NET_VENDOR_NATSEMI=y
+CONFIG_NET_VENDOR_8390=y
+# CONFIG_AX88796 is not set
+# CONFIG_ETHOC is not set
+CONFIG_NET_VENDOR_SEEQ=y
+CONFIG_NET_VENDOR_SMSC=y
+# CONFIG_SMC91X is not set
+# CONFIG_SMC911X is not set
+# CONFIG_SMSC911X is not set
+CONFIG_NET_VENDOR_STMICRO=y
+# CONFIG_STMMAC_ETH is not set
+CONFIG_NET_VENDOR_WIZNET=y
+# CONFIG_WIZNET_W5100 is not set
+# CONFIG_WIZNET_W5300 is not set
+CONFIG_PHYLIB=y
+
+#
+# MII PHY device drivers
+#
+# CONFIG_AT803X_PHY is not set
+# CONFIG_AMD_PHY is not set
+# CONFIG_MARVELL_PHY is not set
+# CONFIG_DAVICOM_PHY is not set
+# CONFIG_QSEMI_PHY is not set
+# CONFIG_LXT_PHY is not set
+# CONFIG_CICADA_PHY is not set
+# CONFIG_VITESSE_PHY is not set
+# CONFIG_SMSC_PHY is not set
+# CONFIG_BROADCOM_PHY is not set
+# CONFIG_BCM87XX_PHY is not set
+# CONFIG_ICPLUS_PHY is not set
+# CONFIG_REALTEK_PHY is not set
+# CONFIG_NATIONAL_PHY is not set
+# CONFIG_STE10XP is not set
+# CONFIG_LSI_ET1011C_PHY is not set
+# CONFIG_MICREL_PHY is not set
+# CONFIG_FIXED_PHY is not set
+CONFIG_MDIO_BITBANG=y
+# CONFIG_PPP is not set
+# CONFIG_SLIP is not set
+
+#
+# USB Network Adapters
+#
+# CONFIG_USB_CATC is not set
+# CONFIG_USB_KAWETH is not set
+# CONFIG_USB_PEGASUS is not set
+# CONFIG_USB_RTL8150 is not set
+# CONFIG_USB_RTL8152 is not set
+# CONFIG_USB_USBNET is not set
+# CONFIG_USB_IPHETH is not set
+CONFIG_WLAN=y
+# CONFIG_USB_ZD1201 is not set
+# CONFIG_USB_NET_RNDIS_WLAN is not set
+# CONFIG_ATH_CARDS is not set
+# CONFIG_BRCMFMAC is not set
+# CONFIG_HOSTAP is not set
+# CONFIG_LIBERTAS is not set
+# CONFIG_WL_TI is not set
+# CONFIG_MWIFIEX is not set
+
+#
+# Enable WiMAX (Networking options) to see the WiMAX drivers
+#
+# CONFIG_WAN is not set
+CONFIG_NETDEV_1000=y
+CONFIG_XMMAC_ETH=y
+# CONFIG_ISDN is not set
+
+#
+# Input device support
+#
+# CONFIG_INPUT is not set
+
+#
+# Hardware I/O ports
+#
+CONFIG_SERIO=y
+CONFIG_SERIO_SERPORT=y
+# CONFIG_SERIO_AMBAKMI is not set
+CONFIG_SERIO_LIBPS2=y
+# CONFIG_SERIO_RAW is not set
+# CONFIG_SERIO_ALTERA_PS2 is not set
+# CONFIG_SERIO_PS2MULT is not set
+# CONFIG_SERIO_ARC_PS2 is not set
+CONFIG_GAMEPORT=m
+CONFIG_GAMEPORT_NS558=m
+CONFIG_GAMEPORT_L4=m
+
+#
+# Character devices
+#
+CONFIG_TTY=y
+# CONFIG_VT is not set
+CONFIG_UNIX98_PTYS=y
+# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_SERIAL_NONSTANDARD is not set
+# CONFIG_N_GSM is not set
+# CONFIG_TRACE_SINK is not set
+# CONFIG_DEVKMEM is not set
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+
+#
+# Non-8250 serial port support
+#
+# CONFIG_SERIAL_AMBA_PL010 is not set
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SERIAL_CORE=y
+CONFIG_SERIAL_CORE_CONSOLE=y
+# CONFIG_SERIAL_SCCNXP is not set
+# CONFIG_SERIAL_TIMBERDALE is not set
+# CONFIG_SERIAL_ALTERA_JTAGUART is not set
+# CONFIG_SERIAL_ALTERA_UART is not set
+# CONFIG_SERIAL_ARC is not set
+# CONFIG_TTY_PRINTK is not set
+# CONFIG_HVC_DCC is not set
+# CONFIG_IPMI_HANDLER is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_R3964 is not set
+# CONFIG_RAW_DRIVER is not set
+# CONFIG_TCG_TPM is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+
+#
+# Qualcomm MSM SSBI bus support
+#
+# CONFIG_SSBI is not set
+# CONFIG_HSI is not set
+
+#
+# PPS support
+#
+# CONFIG_PPS is not set
+
+#
+# PPS generators support
+#
+
+#
+# PTP clock support
+#
+# CONFIG_PTP_1588_CLOCK is not set
+
+#
+# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
+#
+# CONFIG_PTP_1588_CLOCK_PCH is not set
+CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
+CONFIG_GPIO_DEVRES=y
+# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
+# CONFIG_POWER_AVS is not set
+# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
+# CONFIG_WATCHDOG is not set
+CONFIG_SSB_POSSIBLE=y
+
+#
+# Sonics Silicon Backplane
+#
+# CONFIG_SSB is not set
+CONFIG_BCMA_POSSIBLE=y
+
+#
+# Broadcom specific AMBA
+#
+# CONFIG_BCMA is not set
+
+#
+# Multifunction device drivers
+#
+# CONFIG_MFD_CORE is not set
+# CONFIG_MFD_CROS_EC is not set
+# CONFIG_HTC_PASIC3 is not set
+# CONFIG_MFD_VIPERBOARD is not set
+# CONFIG_MFD_SM501 is not set
+# CONFIG_ABX500_CORE is not set
+# CONFIG_MFD_SYSCON is not set
+# CONFIG_MFD_TI_AM335X_TSCADC is not set
+# CONFIG_MFD_TMIO is not set
+# CONFIG_MFD_T7L66XB is not set
+# CONFIG_MFD_TC6387XB is not set
+# CONFIG_MFD_TC6393XB is not set
+# CONFIG_REGULATOR is not set
+# CONFIG_MEDIA_SUPPORT is not set
+
+#
+# Graphics support
+#
+# CONFIG_DRM is not set
+# CONFIG_VGASTATE is not set
+# CONFIG_VIDEO_OUTPUT_CONTROL is not set
+CONFIG_FB=y
+# CONFIG_FIRMWARE_EDID is not set
+# CONFIG_FB_DDC is not set
+# CONFIG_FB_BOOT_VESA_SUPPORT is not set
+# CONFIG_FB_CFB_FILLRECT is not set
+# CONFIG_FB_CFB_COPYAREA is not set
+# CONFIG_FB_CFB_IMAGEBLIT is not set
+# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
+# CONFIG_FB_SYS_FILLRECT is not set
+# CONFIG_FB_SYS_COPYAREA is not set
+# CONFIG_FB_SYS_IMAGEBLIT is not set
+# CONFIG_FB_FOREIGN_ENDIAN is not set
+# CONFIG_FB_SYS_FOPS is not set
+# CONFIG_FB_SVGALIB is not set
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+
+#
+# Frame buffer hardware drivers
+#
+# CONFIG_FB_ARMCLCD is not set
+# CONFIG_FB_S1D13XXX is not set
+# CONFIG_FB_SMSCUFX is not set
+# CONFIG_FB_UDL is not set
+# CONFIG_FB_GOLDFISH is not set
+# CONFIG_FB_VIRTUAL is not set
+# CONFIG_FB_METRONOME is not set
+# CONFIG_FB_BROADSHEET is not set
+# CONFIG_FB_AUO_K190X is not set
+# CONFIG_EXYNOS_VIDEO is not set
+# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+# CONFIG_LOGO is not set
+# CONFIG_SOUND is not set
+CONFIG_USB_ARCH_HAS_OHCI=y
+CONFIG_USB_ARCH_HAS_EHCI=y
+CONFIG_USB_ARCH_HAS_XHCI=y
+CONFIG_USB_SUPPORT=y
+CONFIG_USB_COMMON=y
+CONFIG_USB_ARCH_HAS_HCD=y
+CONFIG_USB=y
+# CONFIG_USB_DEBUG is not set
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+
+#
+# Miscellaneous USB options
+#
+# CONFIG_USB_DEFAULT_PERSIST is not set
+# CONFIG_USB_DYNAMIC_MINORS is not set
+# CONFIG_USB_OTG_WHITELIST is not set
+# CONFIG_USB_OTG_BLACKLIST_HUB is not set
+# CONFIG_USB_MON is not set
+# CONFIG_USB_WUSB_CBAF is not set
+
+#
+# USB Host Controller Drivers
+#
+# CONFIG_USB_C67X00_HCD is not set
+# CONFIG_USB_XHCI_HCD is not set
+# CONFIG_USB_EHCI_HCD is not set
+# CONFIG_USB_OXU210HP_HCD is not set
+# CONFIG_USB_ISP116X_HCD is not set
+# CONFIG_USB_ISP1760_HCD is not set
+# CONFIG_USB_ISP1362_HCD is not set
+# CONFIG_USB_OHCI_HCD is not set
+# CONFIG_USB_SL811_HCD is not set
+# CONFIG_USB_R8A66597_HCD is not set
+
+#
+# USB Device Class drivers
+#
+# CONFIG_USB_ACM is not set
+# CONFIG_USB_PRINTER is not set
+# CONFIG_USB_WDM is not set
+# CONFIG_USB_TMC is not set
+
+#
+# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
+#
+
+#
+# also be needed; see USB_STORAGE Help for more info
+#
+
+#
+# USB Imaging devices
+#
+# CONFIG_USB_MDC800 is not set
+# CONFIG_USB_DWC3 is not set
+# CONFIG_USB_CHIPIDEA is not set
+
+#
+# USB port drivers
+#
+# CONFIG_USB_SERIAL is not set
+
+#
+# USB Miscellaneous drivers
+#
+# CONFIG_USB_EMI62 is not set
+# CONFIG_USB_EMI26 is not set
+# CONFIG_USB_ADUTUX is not set
+# CONFIG_USB_SEVSEG is not set
+# CONFIG_USB_RIO500 is not set
+# CONFIG_USB_LEGOTOWER is not set
+# CONFIG_USB_LCD is not set
+# CONFIG_USB_LED is not set
+# CONFIG_USB_CYPRESS_CY7C63 is not set
+# CONFIG_USB_CYTHERM is not set
+# CONFIG_USB_IDMOUSE is not set
+# CONFIG_USB_FTDI_ELAN is not set
+# CONFIG_USB_APPLEDISPLAY is not set
+# CONFIG_USB_LD is not set
+# CONFIG_USB_TRANCEVIBRATOR is not set
+# CONFIG_USB_IOWARRIOR is not set
+# CONFIG_USB_TEST is not set
+# CONFIG_USB_ISIGHTFW is not set
+# CONFIG_USB_YUREX is not set
+# CONFIG_USB_EZUSB_FX2 is not set
+# CONFIG_USB_PHY is not set
+# CONFIG_USB_GADGET is not set
+CONFIG_MMC=y
+# CONFIG_MMC_DEBUG is not set
+# CONFIG_MMC_UNSAFE_RESUME is not set
+# CONFIG_MMC_CLKGATE is not set
+
+#
+# MMC/SD/SDIO Card Drivers
+#
+CONFIG_MMC_BLOCK=y
+CONFIG_MMC_BLOCK_MINORS=8
+CONFIG_MMC_BLOCK_BOUNCE=y
+# CONFIG_SDIO_UART is not set
+# CONFIG_MMC_TEST is not set
+
+#
+# MMC/SD/SDIO Host Controller Drivers
+#
+CONFIG_MMC_ARASAN=y
+# CONFIG_MMC_WIFI is not set
+CONFIG_MMC_SD=m
+# CONFIG_MMC_ARMMMCI is not set
+# CONFIG_MMC_SDHCI is not set
+# CONFIG_MMC_SDHCI_PXAV3 is not set
+# CONFIG_MMC_SDHCI_PXAV2 is not set
+# CONFIG_MMC_DW is not set
+# CONFIG_MMC_VUB300 is not set
+# CONFIG_MMC_USHC is not set
+# CONFIG_MEMSTICK is not set
+# CONFIG_NEW_LEDS is not set
+# CONFIG_ACCESSIBILITY is not set
+# CONFIG_EDAC is not set
+CONFIG_RTC_LIB=y
+# CONFIG_RTC_CLASS is not set
+CONFIG_DMADEVICES=y
+# CONFIG_DMADEVICES_DEBUG is not set
+
+#
+# DMA Devices
+#
+# CONFIG_AMBA_PL08X is not set
+# CONFIG_DW_DMAC is not set
+# CONFIG_TIMB_DMA is not set
+CONFIG_PL330_DMA=y
+CONFIG_DMA_ENGINE=y
+
+#
+# DMA Clients
+#
+# CONFIG_ASYNC_TX_DMA is not set
+CONFIG_DMATEST=m
+# CONFIG_AUXDISPLAY is not set
+# CONFIG_UIO is not set
+# CONFIG_VIRT_DRIVERS is not set
+
+#
+# Virtio drivers
+#
+# CONFIG_VIRTIO_MMIO is not set
+
+#
+# Microsoft Hyper-V guest support
+#
+# CONFIG_STAGING is not set
+CONFIG_CLKDEV_LOOKUP=y
+
+#
+# Hardware Spinlock drivers
+#
+CONFIG_CLKSRC_MMIO=y
+# CONFIG_MAILBOX is not set
+# CONFIG_IOMMU_SUPPORT is not set
+
+#
+# Remoteproc drivers
+#
+# CONFIG_STE_MODEM_RPROC is not set
+
+#
+# Rpmsg drivers
+#
+# CONFIG_PM_DEVFREQ is not set
+# CONFIG_EXTCON is not set
+# CONFIG_MEMORY is not set
+# CONFIG_IIO is not set
+# CONFIG_PWM is not set
+CONFIG_ARM_GIC=y
+# CONFIG_IPACK_BUS is not set
+# CONFIG_RESET_CONTROLLER is not set
+
+#
+# File systems
+#
+CONFIG_DCACHE_WORD_ACCESS=y
+# CONFIG_EXT2_FS is not set
+# CONFIG_EXT3_FS is not set
+# CONFIG_EXT4_FS is not set
+# CONFIG_REISERFS_FS is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_OCFS2_FS is not set
+# CONFIG_BTRFS_FS is not set
+# CONFIG_NILFS2_FS is not set
+CONFIG_FS_POSIX_ACL=y
+CONFIG_FILE_LOCKING=y
+CONFIG_FSNOTIFY=y
+CONFIG_DNOTIFY=y
+CONFIG_INOTIFY_USER=y
+# CONFIG_FANOTIFY is not set
+# CONFIG_QUOTA is not set
+# CONFIG_QUOTACTL is not set
+CONFIG_AUTOFS4_FS=m
+CONFIG_FUSE_FS=y
+# CONFIG_CUSE is not set
+
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+
+#
+# CD-ROM/DVD Filesystems
+#
+# CONFIG_ISO9660_FS is not set
+# CONFIG_UDF_FS is not set
+
+#
+# DOS/FAT/NT Filesystems
+#
+CONFIG_FAT_FS=y
+# CONFIG_MSDOS_FS is not set
+CONFIG_VFAT_FS=y
+CONFIG_FAT_DEFAULT_CODEPAGE=437
+CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
+# CONFIG_NTFS_FS is not set
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+CONFIG_PROC_SYSCTL=y
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_SYSFS=y
+CONFIG_TMPFS=y
+# CONFIG_TMPFS_POSIX_ACL is not set
+# CONFIG_TMPFS_XATTR is not set
+# CONFIG_HUGETLB_PAGE is not set
+CONFIG_CONFIGFS_FS=y
+CONFIG_MISC_FILESYSTEMS=y
+# CONFIG_ADFS_FS is not set
+# CONFIG_AFFS_FS is not set
+# CONFIG_ECRYPT_FS is not set
+# CONFIG_HFS_FS is not set
+# CONFIG_HFSPLUS_FS is not set
+# CONFIG_BEFS_FS is not set
+# CONFIG_BFS_FS is not set
+# CONFIG_EFS_FS is not set
+CONFIG_JFFS2_FS=y
+CONFIG_JFFS2_FS_DEBUG=0
+CONFIG_JFFS2_FS_WRITEBUFFER=y
+# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
+# CONFIG_JFFS2_SUMMARY is not set
+# CONFIG_JFFS2_FS_XATTR is not set
+CONFIG_JFFS2_COMPRESSION_OPTIONS=y
+CONFIG_JFFS2_ZLIB=y
+CONFIG_JFFS2_LZO=y
+CONFIG_JFFS2_RTIME=y
+# CONFIG_JFFS2_RUBIN is not set
+# CONFIG_JFFS2_CMODE_NONE is not set
+# CONFIG_JFFS2_CMODE_PRIORITY is not set
+# CONFIG_JFFS2_CMODE_SIZE is not set
+CONFIG_JFFS2_CMODE_FAVOURLZO=y
+# CONFIG_LOGFS is not set
+CONFIG_CRAMFS=y
+CONFIG_SQUASHFS=y
+# CONFIG_SQUASHFS_XATTR is not set
+# CONFIG_SQUASHFS_ZLIB is not set
+# CONFIG_SQUASHFS_LZO is not set
+CONFIG_SQUASHFS_XZ=y
+# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
+# CONFIG_SQUASHFS_EMBEDDED is not set
+CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
+# CONFIG_VXFS_FS is not set
+# CONFIG_MINIX_FS is not set
+# CONFIG_OMFS_FS is not set
+# CONFIG_HPFS_FS is not set
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_QNX6FS_FS is not set
+# CONFIG_ROMFS_FS is not set
+# CONFIG_PSTORE is not set
+# CONFIG_SYSV_FS is not set
+# CONFIG_UFS_FS is not set
+# CONFIG_F2FS_FS is not set
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V2=y
+CONFIG_NFS_V3=y
+CONFIG_NFS_V3_ACL=y
+CONFIG_NFS_V4=y
+# CONFIG_NFS_SWAP is not set
+# CONFIG_NFS_V4_1 is not set
+# CONFIG_NFS_USE_LEGACY_DNS is not set
+CONFIG_NFS_USE_KERNEL_DNS=y
+# CONFIG_NFSD is not set
+CONFIG_LOCKD=y
+CONFIG_LOCKD_V4=y
+CONFIG_NFS_ACL_SUPPORT=y
+CONFIG_NFS_COMMON=y
+CONFIG_SUNRPC=y
+CONFIG_SUNRPC_GSS=y
+# CONFIG_SUNRPC_DEBUG is not set
+# CONFIG_CEPH_FS is not set
+CONFIG_CIFS=y
+# CONFIG_CIFS_STATS is not set
+# CONFIG_CIFS_WEAK_PW_HASH is not set
+# CONFIG_CIFS_UPCALL is not set
+# CONFIG_CIFS_XATTR is not set
+# CONFIG_CIFS_DEBUG is not set
+# CONFIG_CIFS_DFS_UPCALL is not set
+# CONFIG_CIFS_SMB2 is not set
+# CONFIG_NCP_FS is not set
+# CONFIG_CODA_FS is not set
+# CONFIG_AFS_FS is not set
+CONFIG_NLS=y
+CONFIG_NLS_DEFAULT="iso8859-1"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_CODEPAGE_737=m
+CONFIG_NLS_CODEPAGE_775=m
+CONFIG_NLS_CODEPAGE_850=m
+CONFIG_NLS_CODEPAGE_852=m
+CONFIG_NLS_CODEPAGE_855=m
+CONFIG_NLS_CODEPAGE_857=m
+CONFIG_NLS_CODEPAGE_860=m
+CONFIG_NLS_CODEPAGE_861=m
+CONFIG_NLS_CODEPAGE_862=m
+CONFIG_NLS_CODEPAGE_863=m
+CONFIG_NLS_CODEPAGE_864=m
+CONFIG_NLS_CODEPAGE_865=m
+CONFIG_NLS_CODEPAGE_866=m
+CONFIG_NLS_CODEPAGE_869=m
+CONFIG_NLS_CODEPAGE_936=y
+CONFIG_NLS_CODEPAGE_950=m
+CONFIG_NLS_CODEPAGE_932=m
+CONFIG_NLS_CODEPAGE_949=m
+CONFIG_NLS_CODEPAGE_874=m
+CONFIG_NLS_ISO8859_8=m
+CONFIG_NLS_CODEPAGE_1250=m
+CONFIG_NLS_CODEPAGE_1251=m
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_ISO8859_2=m
+CONFIG_NLS_ISO8859_3=m
+CONFIG_NLS_ISO8859_4=m
+CONFIG_NLS_ISO8859_5=m
+CONFIG_NLS_ISO8859_6=m
+CONFIG_NLS_ISO8859_7=m
+CONFIG_NLS_ISO8859_9=m
+CONFIG_NLS_ISO8859_13=m
+CONFIG_NLS_ISO8859_14=m
+CONFIG_NLS_ISO8859_15=m
+CONFIG_NLS_KOI8_R=m
+CONFIG_NLS_KOI8_U=m
+# CONFIG_NLS_MAC_ROMAN is not set
+# CONFIG_NLS_MAC_CELTIC is not set
+# CONFIG_NLS_MAC_CENTEURO is not set
+# CONFIG_NLS_MAC_CROATIAN is not set
+# CONFIG_NLS_MAC_CYRILLIC is not set
+# CONFIG_NLS_MAC_GAELIC is not set
+# CONFIG_NLS_MAC_GREEK is not set
+# CONFIG_NLS_MAC_ICELAND is not set
+# CONFIG_NLS_MAC_INUIT is not set
+# CONFIG_NLS_MAC_ROMANIAN is not set
+# CONFIG_NLS_MAC_TURKISH is not set
+CONFIG_NLS_UTF8=y
+# CONFIG_DLM is not set
+
+#
+# Kernel hacking
+#
+# CONFIG_PRINTK_TIME is not set
+CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FRAME_WARN=1024
+# CONFIG_MAGIC_SYSRQ is not set
+# CONFIG_STRIP_ASM_SYMS is not set
+# CONFIG_READABLE_ASM is not set
+# CONFIG_UNUSED_SYMBOLS is not set
+# CONFIG_DEBUG_FS is not set
+# CONFIG_HEADERS_CHECK is not set
+# CONFIG_DEBUG_SECTION_MISMATCH is not set
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_DEBUG_SHIRQ is not set
+# CONFIG_LOCKUP_DETECTOR is not set
+# CONFIG_PANIC_ON_OOPS is not set
+CONFIG_PANIC_ON_OOPS_VALUE=0
+# CONFIG_DETECT_HUNG_TASK is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_TIMER_STATS is not set
+# CONFIG_DEBUG_OBJECTS is not set
+# CONFIG_SLUB_STATS is not set
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+# CONFIG_DEBUG_KMEMLEAK is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_RT_MUTEX_TESTER is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_PROVE_LOCKING is not set
+# CONFIG_LOCK_STAT is not set
+# CONFIG_DEBUG_ATOMIC_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
+# CONFIG_DEBUG_KOBJECT is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
+# CONFIG_DEBUG_INFO is not set
+# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_WRITECOUNT is not set
+# CONFIG_DEBUG_MEMORY_INIT is not set
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_TEST_LIST_SORT is not set
+# CONFIG_DEBUG_SG is not set
+# CONFIG_DEBUG_NOTIFIERS is not set
+# CONFIG_DEBUG_CREDENTIALS is not set
+CONFIG_FRAME_POINTER=y
+# CONFIG_BOOT_PRINTK_DELAY is not set
+
+#
+# RCU Debugging
+#
+# CONFIG_SPARSE_RCU_POINTER is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+CONFIG_RCU_CPU_STALL_TIMEOUT=21
+# CONFIG_RCU_CPU_STALL_INFO is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
+# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
+# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
+# CONFIG_DEBUG_PER_CPU_MAPS is not set
+# CONFIG_NOTIFIER_ERROR_INJECTION is not set
+# CONFIG_FAULT_INJECTION is not set
+# CONFIG_DEBUG_PAGEALLOC is not set
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_TRACING_SUPPORT=y
+# CONFIG_FTRACE is not set
+# CONFIG_RBTREE_TEST is not set
+# CONFIG_INTERVAL_TREE_TEST is not set
+# CONFIG_DMA_API_DEBUG is not set
+# CONFIG_ATOMIC64_SELFTEST is not set
+# CONFIG_SAMPLES is not set
+CONFIG_HAVE_ARCH_KGDB=y
+# CONFIG_KGDB is not set
+# CONFIG_TEST_STRING_HELPERS is not set
+# CONFIG_TEST_KSTRTOX is not set
+# CONFIG_STRICT_DEVMEM is not set
+# CONFIG_ARM_UNWIND is not set
+# CONFIG_DEBUG_USER is not set
+# CONFIG_DEBUG_LL is not set
+CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S"
+CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h"
+# CONFIG_OC_ETM is not set
+# CONFIG_PID_IN_CONTEXTIDR is not set
+
+#
+# Security options
+#
+CONFIG_KEYS=y
+# CONFIG_ENCRYPTED_KEYS is not set
+# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
+# CONFIG_SECURITY_DMESG_RESTRICT is not set
+# CONFIG_SECURITY is not set
+# CONFIG_SECURITYFS is not set
+CONFIG_DEFAULT_SECURITY_DAC=y
+CONFIG_DEFAULT_SECURITY=""
+CONFIG_CRYPTO=y
+
+#
+# Crypto core or helper
+#
+CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_ALGAPI2=y
+CONFIG_CRYPTO_AEAD2=y
+CONFIG_CRYPTO_BLKCIPHER=y
+CONFIG_CRYPTO_BLKCIPHER2=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_PCOMP2=y
+CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MANAGER2=y
+# CONFIG_CRYPTO_USER is not set
+CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
+# CONFIG_CRYPTO_GF128MUL is not set
+# CONFIG_CRYPTO_NULL is not set
+# CONFIG_CRYPTO_PCRYPT is not set
+CONFIG_CRYPTO_WORKQUEUE=y
+# CONFIG_CRYPTO_CRYPTD is not set
+# CONFIG_CRYPTO_AUTHENC is not set
+# CONFIG_CRYPTO_TEST is not set
+
+#
+# Authenticated Encryption with Associated Data
+#
+# CONFIG_CRYPTO_CCM is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_SEQIV is not set
+
+#
+# Block modes
+#
+CONFIG_CRYPTO_CBC=y
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_CTS is not set
+CONFIG_CRYPTO_ECB=y
+# CONFIG_CRYPTO_LRW is not set
+# CONFIG_CRYPTO_PCBC is not set
+# CONFIG_CRYPTO_XTS is not set
+
+#
+# Hash modes
+#
+# CONFIG_CRYPTO_CMAC is not set
+CONFIG_CRYPTO_HMAC=y
+# CONFIG_CRYPTO_XCBC is not set
+# CONFIG_CRYPTO_VMAC is not set
+
+#
+# Digest
+#
+# CONFIG_CRYPTO_CRC32C is not set
+# CONFIG_CRYPTO_CRC32 is not set
+# CONFIG_CRYPTO_GHASH is not set
+CONFIG_CRYPTO_MD4=y
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_MICHAEL_MIC=y
+# CONFIG_CRYPTO_RMD128 is not set
+# CONFIG_CRYPTO_RMD160 is not set
+# CONFIG_CRYPTO_RMD256 is not set
+# CONFIG_CRYPTO_RMD320 is not set
+# CONFIG_CRYPTO_SHA1 is not set
+# CONFIG_CRYPTO_SHA1_ARM is not set
+CONFIG_CRYPTO_SHA256=y
+# CONFIG_CRYPTO_SHA512 is not set
+# CONFIG_CRYPTO_TGR192 is not set
+# CONFIG_CRYPTO_WP512 is not set
+
+#
+# Ciphers
+#
+CONFIG_CRYPTO_AES=y
+# CONFIG_CRYPTO_AES_ARM is not set
+# CONFIG_CRYPTO_ANUBIS is not set
+CONFIG_CRYPTO_ARC4=y
+# CONFIG_CRYPTO_BLOWFISH is not set
+# CONFIG_CRYPTO_CAMELLIA is not set
+# CONFIG_CRYPTO_CAST5 is not set
+# CONFIG_CRYPTO_CAST6 is not set
+CONFIG_CRYPTO_DES=y
+# CONFIG_CRYPTO_FCRYPT is not set
+# CONFIG_CRYPTO_KHAZAD is not set
+# CONFIG_CRYPTO_SALSA20 is not set
+# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SERPENT is not set
+# CONFIG_CRYPTO_TEA is not set
+# CONFIG_CRYPTO_TWOFISH is not set
+
+#
+# Compression
+#
+# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_ZLIB is not set
+# CONFIG_CRYPTO_LZO is not set
+
+#
+# Random Number Generation
+#
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_USER_API_HASH is not set
+# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
+CONFIG_CRYPTO_HW=y
+# CONFIG_ASYMMETRIC_KEY_TYPE is not set
+# CONFIG_BINARY_PRINTF is not set
+
+#
+# Library routines
+#
+CONFIG_BITREVERSE=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_IO=y
+CONFIG_CRC_CCITT=y
+CONFIG_CRC16=m
+# CONFIG_CRC_T10DIF is not set
+CONFIG_CRC_ITU_T=y
+CONFIG_CRC32=y
+# CONFIG_CRC32_SELFTEST is not set
+CONFIG_CRC32_SLICEBY8=y
+# CONFIG_CRC32_SLICEBY4 is not set
+# CONFIG_CRC32_SARWATE is not set
+# CONFIG_CRC32_BIT is not set
+# CONFIG_CRC7 is not set
+# CONFIG_LIBCRC32C is not set
+# CONFIG_CRC8 is not set
+CONFIG_ZLIB_INFLATE=y
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
+CONFIG_XZ_DEC=y
+CONFIG_XZ_DEC_X86=y
+CONFIG_XZ_DEC_POWERPC=y
+CONFIG_XZ_DEC_IA64=y
+CONFIG_XZ_DEC_ARM=y
+CONFIG_XZ_DEC_ARMTHUMB=y
+CONFIG_XZ_DEC_SPARC=y
+CONFIG_XZ_DEC_BCJ=y
+# CONFIG_XZ_DEC_TEST is not set
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_HAS_DMA=y
+CONFIG_CPU_RMAP=y
+CONFIG_DQL=y
+CONFIG_NLATTR=y
+CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y
+CONFIG_AVERAGE=y
+# CONFIG_CORDIC is not set
+# CONFIG_DDR is not set
+CONFIG_OID_REGISTRY=y
+# CONFIG_VIRTUALIZATION is not set
diff --git a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
index 272c295b..0e881c13 100644
--- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
+++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
@@ -36,7 +36,7 @@ BR2_ROOTFS_OVERLAY="$(TOPDIR)/../general/overlay"
# OpenIPC configuration
BR2_TOOLCHAIN_BUILDROOT_VENDOR="openipc"
-BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.18.1"
+BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v21.04.21.1"
BR2_TARGET_GENERIC_HOSTNAME="ipcam"
BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches"
@@ -44,7 +44,7 @@ BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/patches"
BR2_PACKAGE_BUSYBOX_CONFIG="$(TOPDIR)/../general/package/configs/busybox.config"
BR2_PACKAGE_DROPBEAR=y
BR2_PACKAGE_FWPRINTENV_NG=y
-# BR2_PACKAGE_XIONGMAI_OSDRV_XM530 is not set
+BR2_PACKAGE_XIONGMAI_OSDRV_XM530=y
BR2_PACKAGE_IPCTOOL=y
BR2_PACKAGE_JSON_C=y
BR2_PACKAGE_LAME=y
diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai
similarity index 98%
rename from br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M
rename to br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai
index 9cc4c437..527ff344 100755
--- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_64M
+++ b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/load_xiongmai
@@ -5,8 +5,8 @@
# default : rmmod all moules and then insmod them
#
-#内存和地址单位M
MEM_ALL=64
+#MEM_ALL=128
MEM_START=0x800
MEM_SAMALL_LIN=0x1
diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M
deleted file mode 100755
index a6beab9d..00000000
--- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/files/script/loadxm530_128M
+++ /dev/null
@@ -1,143 +0,0 @@
-#!/bin/sh
-# Useage: ./loadxm530 [ -r|-i|-a ]
-# -r : rmmod all modules
-# -i : insmod all modules
-# default : rmmod all moules and then insmod them
-#
-
-#内存和地址单位M
-MEM_ALL=128
-MEM_START=0x800
-MEM_SAMALL_LIN=0x1
-
-MEM_OS=`cat /proc/cmdline | awk '{print $1}' | sed -e 's/mem=//' -e 's/M//'`
-MEM_LEN=`echo "$MEM_ALL $MEM_OS"|awk '{printf("0x%03x00000",$1-$2)}'`
-MEM_START=`echo "$MEM_START $MEM_SAMALL_LIN $MEM_OS"|awk '{printf("0x%03x00000",$1+$2*$3)}'`
-echo MEM_START=$MEM_START MEM_LEN=$MEM_LEN
-
-VI_BUFF=2
-
-report_error()
-{
- echo "******* Error: There's something wrong, please check! *****"
- exit 1
-}
-
-insert_audio()
-{
- echo "insert audio"
- insmod xm_i2s.ko
- insmod acodec.ko
-}
-
-insert_h265()
-{
- echo "insert h265"
- insmod mve_rsrc.ko
- insmod mve_base.ko
-}
-
-insert_vo()
-{
- regs 20000000 1
- regs 20000010 12042d02
- regs 20000044 0x2777
- regs 20000048 0x3
- regs 2000004C 01020102
- regs 20000000 0
-
- insmod xm530_vo.ko
- insmod xm530_vdec.ko
-}
-
-remove_audio()
-{
- echo "remove audio"
- rmmod acodec
- rmmod xm_i2s
-}
-
-insert_sns()
-{
- #Sensor clock 27MHz
- #regs 0x2000002c 1;
- #regs 0x2000000c 0x10110010;
- #regs 0x20000010 0x901F0010;
- #regs 0x20000014 0x01120000;
- #regs 0x2000002c 0;
- #sleep 0.1;
- insmod xm_i2c.ko;
-}
-
-remove_sns()
-{
- rmmod xm_i2c &> /dev/null
- rmmod ssp_sony &> /dev/null
-}
-
-insert_ko()
-{
-# driver load
- insert_sns > /dev/null
- insmod mmz.ko mmz_start=$MEM_START mmz_size=$MEM_LEN
- insmod xm530_vi.ko buffer=$VI_BUFF
- insmod xm530_isp.ko
- insmod xm530_rgn.ko
- insmod xm530_h264.ko
- insmod xm_rtc.ko
- #insmod xm_wdt.ko
- insmod log.ko
-
- insert_audio
- #insert_h265
- #insert_vo
-}
-
-remove_ko()
-{
- #remove_audio
- #rmmod xm_wdt
- #rmmod xm_rtc
- rmmod xm530_h264
- rmmod xm530_rgn
- rmmod xm530_isp
- rmmod xm530_vi
- rmmod mmz
-
- remove_sns
-}
-
-load_usage()
-{
- echo "Usage: ./loadxm530 [-option]"
- echo "options:"
- echo " -i insert modules"
- echo " -r remove modules"
- echo " -h help information"
- echo -e "for example: ./loadxm530 -i\n"
-}
-
-# load module.
-if [ "$1" = "-i" ]
-then
-cd /lib/modules/3.10.103/xiongmai
-insert_ko
-fi
-
-if [ "$1" = "-r" ]
-then
-remove_ko
-fi
-
-if [ "$1" = "-h" ]
-then
-load_usage
-exit
-fi
-
-if [ $# -eq 0 ] || [ "$1" = "-a" ]
-then
-remove_ko
-insert_ko
-fi
-
diff --git a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk
index cd978d58..6c21cbf7 100644
--- a/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk
+++ b/br-ext-chip-xiongmai/package/xiongmai-osdrv-xm530/xiongmai-osdrv-xm530.mk
@@ -30,12 +30,12 @@ define XIONGMAI_OSDRV_XM530_INSTALL_TARGET_CMDS
$(INSTALL) -m 755 -d $(TARGET_DIR)/etc/sensors
# $(INSTALL) -m 644 -t $(TARGET_DIR)/etc/sensors $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/sensor/config/*.ini
- $(INSTALL) -m 755 -d $(TARGET_DIR)/lib/modules/3.10.103/xiongmai
- $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/*.ko
- $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/usb/*.ko
+ $(INSTALL) -m 755 -d $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai
+ $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/*.ko
+ $(INSTALL) -m 644 -t $(TARGET_DIR)/lib/modules/3.10.103+/xiongmai $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/kmod/usb/*.ko
- # $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin
- # $(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/script/*
+ $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin
+ $(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/script/*
# $(INSTALL) -m 755 -d $(TARGET_DIR)/usr/lib/fonts
# $(INSTALL) -m 644 -t $(TARGET_DIR)/usr/lib/fonts $(BR2_EXTERNAL_XIONGMAI_PATH)/package/xiongmai-osdrv-xm530/files/fonts/*.bin