v4.19.13 snapshot.
diff --git a/usr/.gitignore b/usr/.gitignore
new file mode 100644
index 0000000..8e48117
--- /dev/null
+++ b/usr/.gitignore
@@ -0,0 +1,10 @@
+#
+# Generated files
+#
+gen_init_cpio
+initramfs_data.cpio
+initramfs_data.cpio.gz
+initramfs_data.cpio.bz2
+initramfs_data.cpio.lzma
+initramfs_list
+include
diff --git a/usr/Kconfig b/usr/Kconfig
new file mode 100644
index 0000000..43658b8
--- /dev/null
+++ b/usr/Kconfig
@@ -0,0 +1,235 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Configuration for initramfs
+#
+
+config INITRAMFS_SOURCE
+ string "Initramfs source file(s)"
+ default ""
+ help
+ This can be either a single cpio archive with a .cpio suffix or a
+ space-separated list of directories and files for building the
+ initramfs image. A cpio archive should contain a filesystem archive
+ to be used as an initramfs image. Directories should contain a
+ filesystem layout to be included in the initramfs image. Files
+ should contain entries according to the format described by the
+ "usr/gen_init_cpio" program in the kernel tree.
+
+ When multiple directories and files are specified then the
+ initramfs image will be the aggregate of all of them.
+
+ See <file:Documentation/early-userspace/README> for more details.
+
+ If you are not sure, leave it blank.
+
+config INITRAMFS_FORCE
+ bool "Ignore the initramfs passed by the bootloader"
+ depends on CMDLINE_EXTEND || CMDLINE_FORCE
+ help
+ This option causes the kernel to ignore the initramfs image
+ (or initrd image) passed to it by the bootloader. This is
+ analogous to CMDLINE_FORCE, which is found on some architectures,
+ and is useful if you cannot or don't want to change the image
+ your bootloader passes to the kernel.
+
+config INITRAMFS_ROOT_UID
+ int "User ID to map to 0 (user root)"
+ depends on INITRAMFS_SOURCE!=""
+ default "0"
+ help
+ If INITRAMFS_SOURCE points to a directory, files owned by this UID
+ (-1 = current user) will be owned by root in the resulting image.
+
+ If you are not sure, leave it set to "0".
+
+config INITRAMFS_ROOT_GID
+ int "Group ID to map to 0 (group root)"
+ depends on INITRAMFS_SOURCE!=""
+ default "0"
+ help
+ If INITRAMFS_SOURCE points to a directory, files owned by this GID
+ (-1 = current group) will be owned by root in the resulting image.
+
+ If you are not sure, leave it set to "0".
+
+config RD_GZIP
+ bool "Support initial ramdisk/ramfs compressed using gzip"
+ depends on BLK_DEV_INITRD
+ default y
+ select DECOMPRESS_GZIP
+ help
+ Support loading of a gzip encoded initial ramdisk or cpio buffer.
+ If unsure, say Y.
+
+config RD_BZIP2
+ bool "Support initial ramdisk/ramfs compressed using bzip2"
+ default y
+ depends on BLK_DEV_INITRD
+ select DECOMPRESS_BZIP2
+ help
+ Support loading of a bzip2 encoded initial ramdisk or cpio buffer
+ If unsure, say N.
+
+config RD_LZMA
+ bool "Support initial ramdisk/ramfs compressed using LZMA"
+ default y
+ depends on BLK_DEV_INITRD
+ select DECOMPRESS_LZMA
+ help
+ Support loading of a LZMA encoded initial ramdisk or cpio buffer
+ If unsure, say N.
+
+config RD_XZ
+ bool "Support initial ramdisk/ramfs compressed using XZ"
+ depends on BLK_DEV_INITRD
+ default y
+ select DECOMPRESS_XZ
+ help
+ Support loading of a XZ encoded initial ramdisk or cpio buffer.
+ If unsure, say N.
+
+config RD_LZO
+ bool "Support initial ramdisk/ramfs compressed using LZO"
+ default y
+ depends on BLK_DEV_INITRD
+ select DECOMPRESS_LZO
+ help
+ Support loading of a LZO encoded initial ramdisk or cpio buffer
+ If unsure, say N.
+
+config RD_LZ4
+ bool "Support initial ramdisk/ramfs compressed using LZ4"
+ default y
+ depends on BLK_DEV_INITRD
+ select DECOMPRESS_LZ4
+ help
+ Support loading of a LZ4 encoded initial ramdisk or cpio buffer
+ If unsure, say N.
+
+choice
+ prompt "Built-in initramfs compression mode"
+ depends on INITRAMFS_SOURCE!=""
+ optional
+ help
+ This option allows you to decide by which algorithm the builtin
+ initramfs will be compressed. Several compression algorithms are
+ available, which differ in efficiency, compression and
+ decompression speed. Compression speed is only relevant
+ when building a kernel. Decompression speed is relevant at
+ each boot. Also the memory usage during decompression may become
+ relevant on memory constrained systems. This is usually based on the
+ dictionary size of the algorithm with algorithms like XZ and LZMA
+ featuring large dictionary sizes.
+
+ High compression options are mostly useful for users who are
+ low on RAM, since it reduces the memory consumption during
+ boot.
+
+ Keep in mind that your build system needs to provide the appropriate
+ compression tool to compress the generated initram cpio file for
+ embedding.
+
+ If in doubt, select 'None'
+
+config INITRAMFS_COMPRESSION_NONE
+ bool "None"
+ help
+ Do not compress the built-in initramfs at all. This may sound wasteful
+ in space, but, you should be aware that the built-in initramfs will be
+ compressed at a later stage anyways along with the rest of the kernel,
+ on those architectures that support this. However, not compressing the
+ initramfs may lead to slightly higher memory consumption during a
+ short time at boot, while both the cpio image and the unpacked
+ filesystem image will be present in memory simultaneously
+
+config INITRAMFS_COMPRESSION_GZIP
+ bool "Gzip"
+ depends on RD_GZIP
+ help
+ Use the old and well tested gzip compression algorithm. Gzip provides
+ a good balance between compression ratio and decompression speed and
+ has a reasonable compression speed. It is also more likely to be
+ supported by your build system as the gzip tool is present by default
+ on most distros.
+
+config INITRAMFS_COMPRESSION_BZIP2
+ bool "Bzip2"
+ depends on RD_BZIP2
+ help
+ It's compression ratio and speed is intermediate. Decompression speed
+ is slowest among the choices. The initramfs size is about 10% smaller
+ with bzip2, in comparison to gzip. Bzip2 uses a large amount of
+ memory. For modern kernels you will need at least 8MB RAM or more for
+ booting.
+
+ If you choose this, keep in mind that you need to have the bzip2 tool
+ available to be able to compress the initram.
+
+config INITRAMFS_COMPRESSION_LZMA
+ bool "LZMA"
+ depends on RD_LZMA
+ help
+ This algorithm's compression ratio is best but has a large dictionary
+ size which might cause issues in memory constrained systems.
+ Decompression speed is between the other choices. Compression is
+ slowest. The initramfs size is about 33% smaller with LZMA in
+ comparison to gzip.
+
+ If you choose this, keep in mind that you may need to install the xz
+ or lzma tools to be able to compress the initram.
+
+config INITRAMFS_COMPRESSION_XZ
+ bool "XZ"
+ depends on RD_XZ
+ help
+ XZ uses the LZMA2 algorithm and has a large dictionary which may cause
+ problems on memory constrained systems. The initramfs size is about
+ 30% smaller with XZ in comparison to gzip. Decompression speed is
+ better than that of bzip2 but worse than gzip and LZO. Compression is
+ slow.
+
+ If you choose this, keep in mind that you may need to install the xz
+ tool to be able to compress the initram.
+
+config INITRAMFS_COMPRESSION_LZO
+ bool "LZO"
+ depends on RD_LZO
+ help
+ It's compression ratio is the second poorest amongst the choices. The
+ kernel size is about 10% bigger than gzip. Despite that, it's
+ decompression speed is the second fastest and it's compression speed
+ is quite fast too.
+
+ If you choose this, keep in mind that you may need to install the lzop
+ tool to be able to compress the initram.
+
+config INITRAMFS_COMPRESSION_LZ4
+ bool "LZ4"
+ depends on RD_LZ4
+ help
+ It's compression ratio is the poorest amongst the choices. The kernel
+ size is about 15% bigger than gzip; however its decompression speed
+ is the fastest.
+
+ If you choose this, keep in mind that most distros don't provide lz4
+ by default which could cause a build failure.
+
+endchoice
+
+config INITRAMFS_COMPRESSION
+ depends on INITRAMFS_SOURCE!=""
+ string
+ default "" if INITRAMFS_COMPRESSION_NONE
+ default ".gz" if INITRAMFS_COMPRESSION_GZIP
+ default ".bz2" if INITRAMFS_COMPRESSION_BZIP2
+ default ".lzma" if INITRAMFS_COMPRESSION_LZMA
+ default ".xz" if INITRAMFS_COMPRESSION_XZ
+ default ".lzo" if INITRAMFS_COMPRESSION_LZO
+ default ".lz4" if INITRAMFS_COMPRESSION_LZ4
+ default ".gz" if RD_GZIP
+ default ".lz4" if RD_LZ4
+ default ".lzo" if RD_LZO
+ default ".xz" if RD_XZ
+ default ".lzma" if RD_LZMA
+ default ".bz2" if RD_BZIP2
+ default ""
diff --git a/usr/Makefile b/usr/Makefile
new file mode 100644
index 0000000..748f6a6
--- /dev/null
+++ b/usr/Makefile
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# kbuild file for usr/ - including initramfs image
+#
+
+klibcdirs:;
+PHONY += klibcdirs
+
+suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
+datafile_y = initramfs_data.cpio$(suffix_y)
+datafile_d_y = .$(datafile_y).d
+AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
+
+
+# Generate builtin.o based on initramfs_data.o
+obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
+
+# initramfs_data.o contains the compressed initramfs_data.cpio image.
+# The image is included using .incbin, a dependency which is not
+# tracked automatically.
+$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
+
+#####
+# Generate the initramfs cpio archive
+
+hostprogs-y := gen_init_cpio
+initramfs := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh
+ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
+ $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
+ramfs-args := \
+ $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
+ $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
+
+# $(datafile_d_y) is used to identify all files included
+# in initramfs and to detect if any files are added/removed.
+# Removed files are identified by directory timestamp being updated
+# The dependency list is generated by gen_initramfs.sh -l
+ifneq ($(wildcard $(obj)/$(datafile_d_y)),)
+ include $(obj)/$(datafile_d_y)
+endif
+
+quiet_cmd_initfs = GEN $@
+ cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
+
+targets := $(datafile_y)
+
+# do not try to update files included in initramfs
+$(deps_initramfs): ;
+
+$(deps_initramfs): klibcdirs
+# We rebuild initramfs_data.cpio if:
+# 1) Any included file is newer then initramfs_data.cpio
+# 2) There are changes in which files are included (added or deleted)
+# 3) If gen_init_cpio are newer than initramfs_data.cpio
+# 4) arguments to gen_initramfs.sh changes
+$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
+ $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y)
+ $(call if_changed,initfs)
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
new file mode 100644
index 0000000..03b2118
--- /dev/null
+++ b/usr/gen_init_cpio.c
@@ -0,0 +1,624 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+
+/*
+ * Original work by Jeff Garzik
+ *
+ * External file lists, symlink, pipe and fifo support by Thayne Harbaugh
+ * Hard link support by Luciano Rocha
+ */
+
+#define xstr(s) #s
+#define str(s) xstr(s)
+
+static unsigned int offset;
+static unsigned int ino = 721;
+static time_t default_mtime;
+
+struct file_handler {
+ const char *type;
+ int (*handler)(const char *line);
+};
+
+static void push_string(const char *name)
+{
+ unsigned int name_len = strlen(name) + 1;
+
+ fputs(name, stdout);
+ putchar(0);
+ offset += name_len;
+}
+
+static void push_pad (void)
+{
+ while (offset & 3) {
+ putchar(0);
+ offset++;
+ }
+}
+
+static void push_rest(const char *name)
+{
+ unsigned int name_len = strlen(name) + 1;
+ unsigned int tmp_ofs;
+
+ fputs(name, stdout);
+ putchar(0);
+ offset += name_len;
+
+ tmp_ofs = name_len + 110;
+ while (tmp_ofs & 3) {
+ putchar(0);
+ offset++;
+ tmp_ofs++;
+ }
+}
+
+static void push_hdr(const char *s)
+{
+ fputs(s, stdout);
+ offset += 110;
+}
+
+static void cpio_trailer(void)
+{
+ char s[256];
+ const char name[] = "TRAILER!!!";
+
+ sprintf(s, "%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ 0, /* ino */
+ 0, /* mode */
+ (long) 0, /* uid */
+ (long) 0, /* gid */
+ 1, /* nlink */
+ (long) 0, /* mtime */
+ 0, /* filesize */
+ 0, /* major */
+ 0, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ (unsigned)strlen(name)+1, /* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_rest(name);
+
+ while (offset % 512) {
+ putchar(0);
+ offset++;
+ }
+}
+
+static int cpio_mkslink(const char *name, const char *target,
+ unsigned int mode, uid_t uid, gid_t gid)
+{
+ char s[256];
+
+ if (name[0] == '/')
+ name++;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino++, /* ino */
+ S_IFLNK | mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ 1, /* nlink */
+ (long) default_mtime, /* mtime */
+ (unsigned)strlen(target)+1, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ (unsigned)strlen(name) + 1,/* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_string(name);
+ push_pad();
+ push_string(target);
+ push_pad();
+ return 0;
+}
+
+static int cpio_mkslink_line(const char *line)
+{
+ char name[PATH_MAX + 1];
+ char target[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ int rc = -1;
+
+ if (5 != sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) "s %o %d %d", name, target, &mode, &uid, &gid)) {
+ fprintf(stderr, "Unrecognized dir format '%s'", line);
+ goto fail;
+ }
+ rc = cpio_mkslink(name, target, mode, uid, gid);
+ fail:
+ return rc;
+}
+
+static int cpio_mkgeneric(const char *name, unsigned int mode,
+ uid_t uid, gid_t gid)
+{
+ char s[256];
+
+ if (name[0] == '/')
+ name++;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino++, /* ino */
+ mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ 2, /* nlink */
+ (long) default_mtime, /* mtime */
+ 0, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ (unsigned)strlen(name) + 1,/* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_rest(name);
+ return 0;
+}
+
+enum generic_types {
+ GT_DIR,
+ GT_PIPE,
+ GT_SOCK
+};
+
+struct generic_type {
+ const char *type;
+ mode_t mode;
+};
+
+static struct generic_type generic_type_table[] = {
+ [GT_DIR] = {
+ .type = "dir",
+ .mode = S_IFDIR
+ },
+ [GT_PIPE] = {
+ .type = "pipe",
+ .mode = S_IFIFO
+ },
+ [GT_SOCK] = {
+ .type = "sock",
+ .mode = S_IFSOCK
+ }
+};
+
+static int cpio_mkgeneric_line(const char *line, enum generic_types gt)
+{
+ char name[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ int rc = -1;
+
+ if (4 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d", name, &mode, &uid, &gid)) {
+ fprintf(stderr, "Unrecognized %s format '%s'",
+ line, generic_type_table[gt].type);
+ goto fail;
+ }
+ mode |= generic_type_table[gt].mode;
+ rc = cpio_mkgeneric(name, mode, uid, gid);
+ fail:
+ return rc;
+}
+
+static int cpio_mkdir_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_DIR);
+}
+
+static int cpio_mkpipe_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_PIPE);
+}
+
+static int cpio_mksock_line(const char *line)
+{
+ return cpio_mkgeneric_line(line, GT_SOCK);
+}
+
+static int cpio_mknod(const char *name, unsigned int mode,
+ uid_t uid, gid_t gid, char dev_type,
+ unsigned int maj, unsigned int min)
+{
+ char s[256];
+
+ if (dev_type == 'b')
+ mode |= S_IFBLK;
+ else
+ mode |= S_IFCHR;
+
+ if (name[0] == '/')
+ name++;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08X%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino++, /* ino */
+ mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ 1, /* nlink */
+ (long) default_mtime, /* mtime */
+ 0, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ maj, /* rmajor */
+ min, /* rminor */
+ (unsigned)strlen(name) + 1,/* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_rest(name);
+ return 0;
+}
+
+static int cpio_mknod_line(const char *line)
+{
+ char name[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ char dev_type;
+ unsigned int maj;
+ unsigned int min;
+ int rc = -1;
+
+ if (7 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d %c %u %u",
+ name, &mode, &uid, &gid, &dev_type, &maj, &min)) {
+ fprintf(stderr, "Unrecognized nod format '%s'", line);
+ goto fail;
+ }
+ rc = cpio_mknod(name, mode, uid, gid, dev_type, maj, min);
+ fail:
+ return rc;
+}
+
+static int cpio_mkfile(const char *name, const char *location,
+ unsigned int mode, uid_t uid, gid_t gid,
+ unsigned int nlinks)
+{
+ char s[256];
+ char *filebuf = NULL;
+ struct stat buf;
+ long size;
+ int file = -1;
+ int retval;
+ int rc = -1;
+ int namesize;
+ unsigned int i;
+
+ mode |= S_IFREG;
+
+ file = open (location, O_RDONLY);
+ if (file < 0) {
+ fprintf (stderr, "File %s could not be opened for reading\n", location);
+ goto error;
+ }
+
+ retval = fstat(file, &buf);
+ if (retval) {
+ fprintf(stderr, "File %s could not be stat()'ed\n", location);
+ goto error;
+ }
+
+ filebuf = malloc(buf.st_size);
+ if (!filebuf) {
+ fprintf (stderr, "out of memory\n");
+ goto error;
+ }
+
+ retval = read (file, filebuf, buf.st_size);
+ if (retval < 0) {
+ fprintf (stderr, "Can not read %s file\n", location);
+ goto error;
+ }
+
+ size = 0;
+ for (i = 1; i <= nlinks; i++) {
+ /* data goes on last link */
+ if (i == nlinks) size = buf.st_size;
+
+ if (name[0] == '/')
+ name++;
+ namesize = strlen(name) + 1;
+ sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
+ "%08lX%08X%08X%08X%08X%08X%08X",
+ "070701", /* magic */
+ ino, /* ino */
+ mode, /* mode */
+ (long) uid, /* uid */
+ (long) gid, /* gid */
+ nlinks, /* nlink */
+ (long) buf.st_mtime, /* mtime */
+ size, /* filesize */
+ 3, /* major */
+ 1, /* minor */
+ 0, /* rmajor */
+ 0, /* rminor */
+ namesize, /* namesize */
+ 0); /* chksum */
+ push_hdr(s);
+ push_string(name);
+ push_pad();
+
+ if (size) {
+ if (fwrite(filebuf, size, 1, stdout) != 1) {
+ fprintf(stderr, "writing filebuf failed\n");
+ goto error;
+ }
+ offset += size;
+ push_pad();
+ }
+
+ name += namesize;
+ }
+ ino++;
+ rc = 0;
+
+error:
+ if (filebuf) free(filebuf);
+ if (file >= 0) close(file);
+ return rc;
+}
+
+static char *cpio_replace_env(char *new_location)
+{
+ char expanded[PATH_MAX + 1];
+ char *start, *end, *var;
+
+ while ((start = strstr(new_location, "${")) &&
+ (end = strchr(start + 2, '}'))) {
+ *start = *end = 0;
+ var = getenv(start + 2);
+ snprintf(expanded, sizeof expanded, "%s%s%s",
+ new_location, var ? var : "", end + 1);
+ strcpy(new_location, expanded);
+ }
+
+ return new_location;
+}
+
+static int cpio_mkfile_line(const char *line)
+{
+ char name[PATH_MAX + 1];
+ char *dname = NULL; /* malloc'ed buffer for hard links */
+ char location[PATH_MAX + 1];
+ unsigned int mode;
+ int uid;
+ int gid;
+ int nlinks = 1;
+ int end = 0, dname_len = 0;
+ int rc = -1;
+
+ if (5 > sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX)
+ "s %o %d %d %n",
+ name, location, &mode, &uid, &gid, &end)) {
+ fprintf(stderr, "Unrecognized file format '%s'", line);
+ goto fail;
+ }
+ if (end && isgraph(line[end])) {
+ int len;
+ int nend;
+
+ dname = malloc(strlen(line));
+ if (!dname) {
+ fprintf (stderr, "out of memory (%d)\n", dname_len);
+ goto fail;
+ }
+
+ dname_len = strlen(name) + 1;
+ memcpy(dname, name, dname_len);
+
+ do {
+ nend = 0;
+ if (sscanf(line + end, "%" str(PATH_MAX) "s %n",
+ name, &nend) < 1)
+ break;
+ len = strlen(name) + 1;
+ memcpy(dname + dname_len, name, len);
+ dname_len += len;
+ nlinks++;
+ end += nend;
+ } while (isgraph(line[end]));
+ } else {
+ dname = name;
+ }
+ rc = cpio_mkfile(dname, cpio_replace_env(location),
+ mode, uid, gid, nlinks);
+ fail:
+ if (dname_len) free(dname);
+ return rc;
+}
+
+static void usage(const char *prog)
+{
+ fprintf(stderr, "Usage:\n"
+ "\t%s [-t <timestamp>] <cpio_list>\n"
+ "\n"
+ "<cpio_list> is a file containing newline separated entries that\n"
+ "describe the files to be included in the initramfs archive:\n"
+ "\n"
+ "# a comment\n"
+ "file <name> <location> <mode> <uid> <gid> [<hard links>]\n"
+ "dir <name> <mode> <uid> <gid>\n"
+ "nod <name> <mode> <uid> <gid> <dev_type> <maj> <min>\n"
+ "slink <name> <target> <mode> <uid> <gid>\n"
+ "pipe <name> <mode> <uid> <gid>\n"
+ "sock <name> <mode> <uid> <gid>\n"
+ "\n"
+ "<name> name of the file/dir/nod/etc in the archive\n"
+ "<location> location of the file in the current filesystem\n"
+ " expands shell variables quoted with ${}\n"
+ "<target> link target\n"
+ "<mode> mode/permissions of the file\n"
+ "<uid> user id (0=root)\n"
+ "<gid> group id (0=root)\n"
+ "<dev_type> device type (b=block, c=character)\n"
+ "<maj> major number of nod\n"
+ "<min> minor number of nod\n"
+ "<hard links> space separated list of other links to file\n"
+ "\n"
+ "example:\n"
+ "# A simple initramfs\n"
+ "dir /dev 0755 0 0\n"
+ "nod /dev/console 0600 0 0 c 5 1\n"
+ "dir /root 0700 0 0\n"
+ "dir /sbin 0755 0 0\n"
+ "file /sbin/kinit /usr/src/klibc/kinit/kinit 0755 0 0\n"
+ "\n"
+ "<timestamp> is time in seconds since Epoch that will be used\n"
+ "as mtime for symlinks, special files and directories. The default\n"
+ "is to use the current time for these entries.\n",
+ prog);
+}
+
+struct file_handler file_handler_table[] = {
+ {
+ .type = "file",
+ .handler = cpio_mkfile_line,
+ }, {
+ .type = "nod",
+ .handler = cpio_mknod_line,
+ }, {
+ .type = "dir",
+ .handler = cpio_mkdir_line,
+ }, {
+ .type = "slink",
+ .handler = cpio_mkslink_line,
+ }, {
+ .type = "pipe",
+ .handler = cpio_mkpipe_line,
+ }, {
+ .type = "sock",
+ .handler = cpio_mksock_line,
+ }, {
+ .type = NULL,
+ .handler = NULL,
+ }
+};
+
+#define LINE_SIZE (2 * PATH_MAX + 50)
+
+int main (int argc, char *argv[])
+{
+ FILE *cpio_list;
+ char line[LINE_SIZE];
+ char *args, *type;
+ int ec = 0;
+ int line_nr = 0;
+ const char *filename;
+
+ default_mtime = time(NULL);
+ while (1) {
+ int opt = getopt(argc, argv, "t:h");
+ char *invalid;
+
+ if (opt == -1)
+ break;
+ switch (opt) {
+ case 't':
+ default_mtime = strtol(optarg, &invalid, 10);
+ if (!*optarg || *invalid) {
+ fprintf(stderr, "Invalid timestamp: %s\n",
+ optarg);
+ usage(argv[0]);
+ exit(1);
+ }
+ break;
+ case 'h':
+ case '?':
+ usage(argv[0]);
+ exit(opt == 'h' ? 0 : 1);
+ }
+ }
+
+ if (argc - optind != 1) {
+ usage(argv[0]);
+ exit(1);
+ }
+ filename = argv[optind];
+ if (!strcmp(filename, "-"))
+ cpio_list = stdin;
+ else if (!(cpio_list = fopen(filename, "r"))) {
+ fprintf(stderr, "ERROR: unable to open '%s': %s\n\n",
+ filename, strerror(errno));
+ usage(argv[0]);
+ exit(1);
+ }
+
+ while (fgets(line, LINE_SIZE, cpio_list)) {
+ int type_idx;
+ size_t slen = strlen(line);
+
+ line_nr++;
+
+ if ('#' == *line) {
+ /* comment - skip to next line */
+ continue;
+ }
+
+ if (! (type = strtok(line, " \t"))) {
+ fprintf(stderr,
+ "ERROR: incorrect format, could not locate file type line %d: '%s'\n",
+ line_nr, line);
+ ec = -1;
+ break;
+ }
+
+ if ('\n' == *type) {
+ /* a blank line */
+ continue;
+ }
+
+ if (slen == strlen(type)) {
+ /* must be an empty line */
+ continue;
+ }
+
+ if (! (args = strtok(NULL, "\n"))) {
+ fprintf(stderr,
+ "ERROR: incorrect format, newline required line %d: '%s'\n",
+ line_nr, line);
+ ec = -1;
+ }
+
+ for (type_idx = 0; file_handler_table[type_idx].type; type_idx++) {
+ int rc;
+ if (! strcmp(line, file_handler_table[type_idx].type)) {
+ if ((rc = file_handler_table[type_idx].handler(args))) {
+ ec = rc;
+ fprintf(stderr, " line %d\n", line_nr);
+ }
+ break;
+ }
+ }
+
+ if (NULL == file_handler_table[type_idx].type) {
+ fprintf(stderr, "unknown file type line %d: '%s'\n",
+ line_nr, line);
+ }
+ }
+ if (ec == 0)
+ cpio_trailer();
+
+ exit(ec);
+}
diff --git a/usr/gen_initramfs_list.sh b/usr/gen_initramfs_list.sh
new file mode 100755
index 0000000..0aad760
--- /dev/null
+++ b/usr/gen_initramfs_list.sh
@@ -0,0 +1,328 @@
+#!/bin/sh
+# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
+# Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
+#
+# Released under the terms of the GNU GPL
+#
+# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
+# the cpio archive, and then compresses it.
+# The script may also be used to generate the inputfile used for gen_init_cpio
+# This script assumes that gen_init_cpio is located in usr/ directory
+
+# error out on errors
+set -e
+
+usage() {
+cat << EOF
+Usage:
+$0 [-o <file>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
+ -o <file> Create compressed initramfs file named <file> using
+ gen_init_cpio and compressor depending on the extension
+ -u <uid> User ID to map to user ID 0 (root).
+ <uid> is only meaningful if <cpio_source> is a
+ directory. "squash" forces all files to uid 0.
+ -g <gid> Group ID to map to group ID 0 (root).
+ <gid> is only meaningful if <cpio_source> is a
+ directory. "squash" forces all files to gid 0.
+ <cpio_source> File list or directory for cpio archive.
+ If <cpio_source> is a .cpio file it will be used
+ as direct input to initramfs.
+ -d Output the default cpio list.
+
+All options except -o and -l may be repeated and are interpreted
+sequentially and immediately. -u and -g states are preserved across
+<cpio_source> options so an explicit "-u 0 -g 0" is required
+to reset the root/group mapping.
+EOF
+}
+
+# awk style field access
+# $1 - field number; rest is argument string
+field() {
+ shift $1 ; echo $1
+}
+
+list_default_initramfs() {
+ # echo usr/kinit/kinit
+ :
+}
+
+default_initramfs() {
+ cat <<-EOF >> ${output}
+ # This is a very simple, default initramfs
+
+ dir /dev 0755 0 0
+ nod /dev/console 0600 0 0 c 5 1
+ dir /root 0700 0 0
+ # file /kinit usr/kinit/kinit 0755 0 0
+ # slink /init kinit 0755 0 0
+ EOF
+}
+
+filetype() {
+ local argv1="$1"
+
+ # symlink test must come before file test
+ if [ -L "${argv1}" ]; then
+ echo "slink"
+ elif [ -f "${argv1}" ]; then
+ echo "file"
+ elif [ -d "${argv1}" ]; then
+ echo "dir"
+ elif [ -b "${argv1}" -o -c "${argv1}" ]; then
+ echo "nod"
+ elif [ -p "${argv1}" ]; then
+ echo "pipe"
+ elif [ -S "${argv1}" ]; then
+ echo "sock"
+ else
+ echo "invalid"
+ fi
+ return 0
+}
+
+list_print_mtime() {
+ :
+}
+
+print_mtime() {
+ local my_mtime="0"
+
+ if [ -e "$1" ]; then
+ my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
+ fi
+
+ echo "# Last modified: ${my_mtime}" >> ${output}
+ echo "" >> ${output}
+}
+
+list_parse() {
+ if [ -L "$1" ]; then
+ return
+ fi
+ echo "$1" | sed 's/:/\\:/g; s/$/ \\/'
+}
+
+# for each file print a line in following format
+# <filetype> <name> <path to file> <octal mode> <uid> <gid>
+# for links, devices etc the format differs. See gen_init_cpio for details
+parse() {
+ local location="$1"
+ local name="/${location#${srcdir}}"
+ # change '//' into '/'
+ name=$(echo "$name" | sed -e 's://*:/:g')
+ local mode="$2"
+ local uid="$3"
+ local gid="$4"
+ local ftype=$(filetype "${location}")
+ # remap uid/gid to 0 if necessary
+ [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0
+ [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0
+ local str="${mode} ${uid} ${gid}"
+
+ [ "${ftype}" = "invalid" ] && return 0
+ [ "${location}" = "${srcdir}" ] && return 0
+
+ case "${ftype}" in
+ "file")
+ str="${ftype} ${name} ${location} ${str}"
+ ;;
+ "nod")
+ local dev=`LC_ALL=C ls -l "${location}"`
+ local maj=`field 5 ${dev}`
+ local min=`field 6 ${dev}`
+ maj=${maj%,}
+
+ [ -b "${location}" ] && dev="b" || dev="c"
+
+ str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
+ ;;
+ "slink")
+ local target=`readlink "${location}"`
+ str="${ftype} ${name} ${target} ${str}"
+ ;;
+ *)
+ str="${ftype} ${name} ${str}"
+ ;;
+ esac
+
+ echo "${str}" >> ${output}
+
+ return 0
+}
+
+unknown_option() {
+ printf "ERROR: unknown option \"$arg\"\n" >&2
+ printf "If the filename validly begins with '-', " >&2
+ printf "then it must be prefixed\n" >&2
+ printf "by './' so that it won't be interpreted as an option." >&2
+ printf "\n" >&2
+ usage >&2
+ exit 1
+}
+
+list_header() {
+ :
+}
+
+header() {
+ printf "\n#####################\n# $1\n" >> ${output}
+}
+
+# process one directory (incl sub-directories)
+dir_filelist() {
+ ${dep_list}header "$1"
+
+ srcdir=$(echo "$1" | sed -e 's://*:/:g')
+ dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort)
+
+ # If $dirlist is only one line, then the directory is empty
+ if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
+ ${dep_list}print_mtime "$1"
+
+ echo "${dirlist}" | \
+ while read x; do
+ ${dep_list}parse ${x}
+ done
+ fi
+}
+
+# if only one file is specified and it is .cpio file then use it direct as fs
+# if a directory is specified then add all files in given direcotry to fs
+# if a regular file is specified assume it is in gen_initramfs format
+input_file() {
+ source="$1"
+ if [ -f "$1" ]; then
+ ${dep_list}header "$1"
+ is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')"
+ if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then
+ cpio_file=$1
+ echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"
+ [ ! -z ${dep_list} ] && echo "$1"
+ return 0
+ fi
+ if [ -z ${dep_list} ]; then
+ print_mtime "$1" >> ${output}
+ cat "$1" >> ${output}
+ else
+ echo "$1 \\"
+ cat "$1" | while read type dir file perm ; do
+ if [ "$type" = "file" ]; then
+ echo "$file \\";
+ fi
+ done
+ fi
+ elif [ -d "$1" ]; then
+ dir_filelist "$1"
+ else
+ echo " ${prog}: Cannot open '$1'" >&2
+ exit 1
+ fi
+}
+
+prog=$0
+root_uid=0
+root_gid=0
+dep_list=
+cpio_file=
+cpio_list=
+output="/dev/stdout"
+output_file=""
+is_cpio_compressed=
+compr="gzip -n -9 -f"
+
+arg="$1"
+case "$arg" in
+ "-l") # files included in initramfs - used by kbuild
+ dep_list="list_"
+ echo "deps_initramfs := $0 \\"
+ shift
+ ;;
+ "-o") # generate compressed cpio image named $1
+ shift
+ output_file="$1"
+ cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
+ output=${cpio_list}
+ echo "$output_file" | grep -q "\.gz$" \
+ && [ -x "`which gzip 2> /dev/null`" ] \
+ && compr="gzip -n -9 -f"
+ echo "$output_file" | grep -q "\.bz2$" \
+ && [ -x "`which bzip2 2> /dev/null`" ] \
+ && compr="bzip2 -9 -f"
+ echo "$output_file" | grep -q "\.lzma$" \
+ && [ -x "`which lzma 2> /dev/null`" ] \
+ && compr="lzma -9 -f"
+ echo "$output_file" | grep -q "\.xz$" \
+ && [ -x "`which xz 2> /dev/null`" ] \
+ && compr="xz --check=crc32 --lzma2=dict=1MiB"
+ echo "$output_file" | grep -q "\.lzo$" \
+ && [ -x "`which lzop 2> /dev/null`" ] \
+ && compr="lzop -9 -f"
+ echo "$output_file" | grep -q "\.lz4$" \
+ && [ -x "`which lz4 2> /dev/null`" ] \
+ && compr="lz4 -l -9 -f"
+ echo "$output_file" | grep -q "\.cpio$" && compr="cat"
+ shift
+ ;;
+esac
+while [ $# -gt 0 ]; do
+ arg="$1"
+ shift
+ case "$arg" in
+ "-u") # map $1 to uid=0 (root)
+ root_uid="$1"
+ [ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
+ shift
+ ;;
+ "-g") # map $1 to gid=0 (root)
+ root_gid="$1"
+ [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
+ shift
+ ;;
+ "-d") # display default initramfs list
+ default_list="$arg"
+ ${dep_list}default_initramfs
+ ;;
+ "-h")
+ usage
+ exit 0
+ ;;
+ *)
+ case "$arg" in
+ "-"*)
+ unknown_option
+ ;;
+ *) # input file/dir - process it
+ input_file "$arg" "$#"
+ ;;
+ esac
+ ;;
+ esac
+done
+
+# If output_file is set we will generate cpio archive and compress it
+# we are careful to delete tmp files
+if [ ! -z ${output_file} ]; then
+ if [ -z ${cpio_file} ]; then
+ timestamp=
+ if test -n "$KBUILD_BUILD_TIMESTAMP"; then
+ timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
+ if test -n "$timestamp"; then
+ timestamp="-t $timestamp"
+ fi
+ fi
+ cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
+ usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
+ else
+ cpio_tfile=${cpio_file}
+ fi
+ rm ${cpio_list}
+ if [ "${is_cpio_compressed}" = "compressed" ]; then
+ cat ${cpio_tfile} > ${output_file}
+ else
+ (cat ${cpio_tfile} | ${compr} - > ${output_file}) \
+ || (rm -f ${output_file} ; false)
+ fi
+ [ -z ${cpio_file} ] && rm ${cpio_tfile}
+fi
+exit 0
diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S
new file mode 100644
index 0000000..d07648f
--- /dev/null
+++ b/usr/initramfs_data.S
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ initramfs_data includes the compressed binary that is the
+ filesystem used for early user space.
+ Note: Older versions of "as" (prior to binutils 2.11.90.0.23
+ released on 2001-07-14) dit not support .incbin.
+ If you are forced to use older binutils than that then the
+ following trick can be applied to create the resulting binary:
+
+
+ ld -m elf_i386 --format binary --oformat elf32-i386 -r \
+ -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
+ ld -m elf_i386 -r -o built-in.a initramfs_data.o
+
+ For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds.
+
+ The above example is for i386 - the parameters vary from architectures.
+ Eventually look up LDFLAGS_BLOB in an older version of the
+ arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
+
+ Using .incbin has the advantage over ld that the correct flags are set
+ in the ELF header, as required by certain architectures.
+*/
+
+#include <linux/stringify.h>
+#include <asm-generic/vmlinux.lds.h>
+
+.section .init.ramfs,"a"
+__irf_start:
+.incbin __stringify(INITRAMFS_IMAGE)
+__irf_end:
+.section .init.ramfs.info,"a"
+.globl __initramfs_size
+__initramfs_size:
+#ifdef CONFIG_64BIT
+ .quad __irf_end - __irf_start
+#else
+ .long __irf_end - __irf_start
+#endif