Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/init/Kconfig b/init/Kconfig
new file mode 100644
index 0000000..abe2682
--- /dev/null
+++ b/init/Kconfig
@@ -0,0 +1,463 @@
+menu "Code maturity level options"
+
+config EXPERIMENTAL
+ bool "Prompt for development and/or incomplete code/drivers"
+ ---help---
+ Some of the various things that Linux supports (such as network
+ drivers, file systems, network protocols, etc.) can be in a state
+ of development where the functionality, stability, or the level of
+ testing is not yet high enough for general use. This is usually
+ known as the "alpha-test" phase among developers. If a feature is
+ currently in alpha-test, then the developers usually discourage
+ uninformed widespread use of this feature by the general public to
+ avoid "Why doesn't this work?" type mail messages. However, active
+ testing and use of these systems is welcomed. Just be aware that it
+ may not meet the normal level of reliability or it may fail to work
+ in some special cases. Detailed bug reports from people familiar
+ with the kernel internals are usually welcomed by the developers
+ (before submitting bug reports, please read the documents
+ <file:README>, <file:MAINTAINERS>, <file:REPORTING-BUGS>,
+ <file:Documentation/BUG-HUNTING>, and
+ <file:Documentation/oops-tracing.txt> in the kernel source).
+
+ This option will also make obsoleted drivers available. These are
+ drivers that have been replaced by something else, and/or are
+ scheduled to be removed in a future kernel release.
+
+ Unless you intend to help test and develop a feature or driver that
+ falls into this category, or you have a situation that requires
+ using these features, you should probably say N here, which will
+ cause the configurator to present you with fewer choices. If
+ you say Y here, you will be offered the choice of using features or
+ drivers that are currently considered to be in the alpha-test phase.
+
+config CLEAN_COMPILE
+ bool "Select only drivers expected to compile cleanly" if EXPERIMENTAL
+ default y
+ help
+ Select this option if you don't even want to see the option
+ to configure known-broken drivers.
+
+ If unsure, say Y
+
+config BROKEN
+ bool
+ depends on !CLEAN_COMPILE
+ default y
+
+config BROKEN_ON_SMP
+ bool
+ depends on BROKEN || !SMP
+ default y
+
+config LOCK_KERNEL
+ bool
+ depends on SMP || PREEMPT
+ default y
+
+config INIT_ENV_ARG_LIMIT
+ int
+ default 32 if !USERMODE
+ default 128 if USERMODE
+ help
+ This is the value of the two limits on the number of argument and of
+ env.var passed to init from the kernel command line.
+
+endmenu
+
+menu "General setup"
+
+config LOCALVERSION
+ string "Local version - append to kernel release"
+ help
+ Append an extra string to the end of your kernel version.
+ This will show up when you type uname, for example.
+ The string you set here will be appended after the contents of
+ any files with a filename matching localversion* in your
+ object and source tree, in that order. Your total string can
+ be a maximum of 64 characters.
+
+config SWAP
+ bool "Support for paging of anonymous memory (swap)"
+ depends on MMU
+ default y
+ help
+ This option allows you to choose whether you want to have support
+ for socalled swap devices or swap files in your kernel that are
+ used to provide more virtual memory than the actual RAM present
+ in your computer. If unsure say Y.
+
+config SYSVIPC
+ bool "System V IPC"
+ depends on MMU
+ ---help---
+ Inter Process Communication is a suite of library functions and
+ system calls which let processes (running programs) synchronize and
+ exchange information. It is generally considered to be a good thing,
+ and some programs won't run unless you say Y here. In particular, if
+ you want to run the DOS emulator dosemu under Linux (read the
+ DOSEMU-HOWTO, available from <http://www.tldp.org/docs.html#howto>),
+ you'll need to say Y here.
+
+ You can find documentation about IPC with "info ipc" and also in
+ section 6.4 of the Linux Programmer's Guide, available from
+ <http://www.tldp.org/guides.html>.
+
+config POSIX_MQUEUE
+ bool "POSIX Message Queues"
+ depends on NET && EXPERIMENTAL
+ ---help---
+ POSIX variant of message queues is a part of IPC. In POSIX message
+ queues every message has a priority which decides about succession
+ of receiving it by a process. If you want to compile and run
+ programs written e.g. for Solaris with use of its POSIX message
+ queues (functions mq_*) say Y here. To use this feature you will
+ also need mqueue library, available from
+ <http://www.mat.uni.torun.pl/~wrona/posix_ipc/>
+
+ POSIX message queues are visible as a filesystem called 'mqueue'
+ and can be mounted somewhere if you want to do filesystem
+ operations on message queues.
+
+ If unsure, say Y.
+
+config BSD_PROCESS_ACCT
+ bool "BSD Process Accounting"
+ help
+ If you say Y here, a user level program will be able to instruct the
+ kernel (via a special system call) to write process accounting
+ information to a file: whenever a process exits, information about
+ that process will be appended to the file by the kernel. The
+ information includes things such as creation time, owning user,
+ command name, memory usage, controlling terminal etc. (the complete
+ list is in the struct acct in <file:include/linux/acct.h>). It is
+ up to the user level program to do useful things with this
+ information. This is generally a good idea, so say Y.
+
+config BSD_PROCESS_ACCT_V3
+ bool "BSD Process Accounting version 3 file format"
+ depends on BSD_PROCESS_ACCT
+ default n
+ help
+ If you say Y here, the process accounting information is written
+ in a new file format that also logs the process IDs of each
+ process and it's parent. Note that this file format is incompatible
+ with previous v0/v1/v2 file formats, so you will need updated tools
+ for processing it. A preliminary version of these tools is available
+ at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
+
+config SYSCTL
+ bool "Sysctl support"
+ ---help---
+ The sysctl interface provides a means of dynamically changing
+ certain kernel parameters and variables on the fly without requiring
+ a recompile of the kernel or reboot of the system. The primary
+ interface consists of a system call, but if you say Y to "/proc
+ file system support", a tree of modifiable sysctl entries will be
+ generated beneath the /proc/sys directory. They are explained in the
+ files in <file:Documentation/sysctl/>. Note that enabling this
+ option will enlarge the kernel by at least 8 KB.
+
+ As it is generally a good thing, you should say Y here unless
+ building a kernel for install/rescue disks or your system is very
+ limited in memory.
+
+config AUDIT
+ bool "Auditing support"
+ default y if SECURITY_SELINUX
+ help
+ Enable auditing infrastructure that can be used with another
+ kernel subsystem, such as SELinux (which requires this for
+ logging of avc messages output). Does not do system-call
+ auditing without CONFIG_AUDITSYSCALL.
+
+config AUDITSYSCALL
+ bool "Enable system-call auditing support"
+ depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64)
+ default y if SECURITY_SELINUX
+ help
+ Enable low-overhead system-call auditing infrastructure that
+ can be used independently or with another kernel subsystem,
+ such as SELinux.
+
+config HOTPLUG
+ bool "Support for hot-pluggable devices" if !ARCH_S390
+ default ARCH_S390
+ help
+ This option is provided for the case where no in-kernel-tree
+ modules require HOTPLUG functionality, but a module built
+ outside the kernel tree does. Such modules require Y here.
+
+config KOBJECT_UEVENT
+ bool "Kernel Userspace Events"
+ depends on NET
+ default y
+ help
+ This option enables the kernel userspace event layer, which is a
+ simple mechanism for kernel-to-user communication over a netlink
+ socket.
+ The goal of the kernel userspace events layer is to provide a simple
+ and efficient events system, that notifies userspace about kobject
+ state changes. This will enable applications to just listen for
+ events instead of polling system devices and files.
+ Hotplug events (kobject addition and removal) are also available on
+ the netlink socket in addition to the execution of /sbin/hotplug if
+ CONFIG_HOTPLUG is enabled.
+
+ Say Y, unless you are building a system requiring minimal memory
+ consumption.
+
+config IKCONFIG
+ bool "Kernel .config support"
+ ---help---
+ This option enables the complete Linux kernel ".config" file
+ contents to be saved in the kernel. It provides documentation
+ of which kernel options are used in a running kernel or in an
+ on-disk kernel. This information can be extracted from the kernel
+ image file with the script scripts/extract-ikconfig and used as
+ input to rebuild the current kernel or to build another kernel.
+ It can also be extracted from a running kernel by reading
+ /proc/config.gz if enabled (below).
+
+config IKCONFIG_PROC
+ bool "Enable access to .config through /proc/config.gz"
+ depends on IKCONFIG && PROC_FS
+ ---help---
+ This option enables access to the kernel configuration file
+ through /proc/config.gz.
+
+config CPUSETS
+ bool "Cpuset support"
+ depends on SMP
+ help
+ This options will let you create and manage CPUSET's which
+ allow dynamically partitioning a system into sets of CPUs and
+ Memory Nodes and assigning tasks to run only within those sets.
+ This is primarily useful on large SMP or NUMA systems.
+
+ Say N if unsure.
+
+menuconfig EMBEDDED
+ bool "Configure standard kernel features (for small systems)"
+ help
+ This option allows certain base kernel options and settings
+ to be disabled or tweaked. This is for specialized
+ environments which can tolerate a "non-standard" kernel.
+ Only use this if you really know what you are doing.
+
+config KALLSYMS
+ bool "Load all symbols for debugging/kksymoops" if EMBEDDED
+ default y
+ help
+ Say Y here to let the kernel print out symbolic crash information and
+ symbolic stack backtraces. This increases the size of the kernel
+ somewhat, as all symbols have to be loaded into the kernel image.
+
+config KALLSYMS_ALL
+ bool "Include all symbols in kallsyms"
+ depends on DEBUG_KERNEL && KALLSYMS
+ help
+ Normally kallsyms only contains the symbols of functions, for nicer
+ OOPS messages. Some debuggers can use kallsyms for other
+ symbols too: say Y here to include all symbols, and you
+ don't care about adding 300k to the size of your kernel.
+
+ Say N.
+
+config KALLSYMS_EXTRA_PASS
+ bool "Do an extra kallsyms pass"
+ depends on KALLSYMS
+ help
+ If kallsyms is not working correctly, the build will fail with
+ inconsistent kallsyms data. If that occurs, log a bug report and
+ turn on KALLSYMS_EXTRA_PASS which should result in a stable build.
+ Always say N here unless you find a bug in kallsyms, which must be
+ reported. KALLSYMS_EXTRA_PASS is only a temporary workaround while
+ you wait for kallsyms to be fixed.
+
+config BASE_FULL
+ default y
+ bool "Enable full-sized data structures for core" if EMBEDDED
+ help
+ Disabling this option reduces the size of miscellaneous core
+ kernel data structures. This saves memory on small machines,
+ but may reduce performance.
+
+config FUTEX
+ bool "Enable futex support" if EMBEDDED
+ default y
+ help
+ Disabling this option will cause the kernel to be built without
+ support for "fast userspace mutexes". The resulting kernel may not
+ run glibc-based applications correctly.
+
+config EPOLL
+ bool "Enable eventpoll support" if EMBEDDED
+ default y
+ help
+ Disabling this option will cause the kernel to be built without
+ support for epoll family of system calls.
+
+config CC_OPTIMIZE_FOR_SIZE
+ bool "Optimize for size" if EMBEDDED
+ default y if ARM || H8300
+ help
+ Enabling this option will pass "-Os" instead of "-O2" to gcc
+ resulting in a smaller kernel.
+
+ WARNING: some versions of gcc may generate incorrect code with this
+ option. If problems are observed, a gcc upgrade may be needed.
+
+ If unsure, say N.
+
+config SHMEM
+ bool "Use full shmem filesystem" if EMBEDDED
+ default y
+ depends on MMU
+ help
+ The shmem is an internal filesystem used to manage shared memory.
+ It is backed by swap and manages resource limits. It is also exported
+ to userspace as tmpfs if TMPFS is enabled. Disabling this
+ option replaces shmem and tmpfs with the much simpler ramfs code,
+ which may be appropriate on small systems without swap.
+
+config CC_ALIGN_FUNCTIONS
+ int "Function alignment" if EMBEDDED
+ default 0
+ help
+ Align the start of functions to the next power-of-two greater than n,
+ skipping up to n bytes. For instance, 32 aligns functions
+ to the next 32-byte boundary, but 24 would align to the next
+ 32-byte boundary only if this can be done by skipping 23 bytes or less.
+ Zero means use compiler's default.
+
+config CC_ALIGN_LABELS
+ int "Label alignment" if EMBEDDED
+ default 0
+ help
+ Align all branch targets to a power-of-two boundary, skipping
+ up to n bytes like ALIGN_FUNCTIONS. This option can easily
+ make code slower, because it must insert dummy operations for
+ when the branch target is reached in the usual flow of the code.
+ Zero means use compiler's default.
+
+config CC_ALIGN_LOOPS
+ int "Loop alignment" if EMBEDDED
+ default 0
+ help
+ Align loops to a power-of-two boundary, skipping up to n bytes.
+ Zero means use compiler's default.
+
+config CC_ALIGN_JUMPS
+ int "Jump alignment" if EMBEDDED
+ default 0
+ help
+ Align branch targets to a power-of-two boundary, for branch
+ targets where the targets can only be reached by jumping,
+ skipping up to n bytes like ALIGN_FUNCTIONS. In this case,
+ no dummy operations need be executed.
+ Zero means use compiler's default.
+
+endmenu # General setup
+
+config TINY_SHMEM
+ default !SHMEM
+ bool
+
+config BASE_SMALL
+ int
+ default 0 if BASE_FULL
+ default 1 if !BASE_FULL
+
+menu "Loadable module support"
+
+config MODULES
+ bool "Enable loadable module support"
+ help
+ Kernel modules are small pieces of compiled code which can
+ be inserted in the running kernel, rather than being
+ permanently built into the kernel. You use the "modprobe"
+ tool to add (and sometimes remove) them. If you say Y here,
+ many parts of the kernel can be built as modules (by
+ answering M instead of Y where indicated): this is most
+ useful for infrequently used options which are not required
+ for booting. For more information, see the man pages for
+ modprobe, lsmod, modinfo, insmod and rmmod.
+
+ If you say Y here, you will need to run "make
+ modules_install" to put the modules under /lib/modules/
+ where modprobe can find them (you may need to be root to do
+ this).
+
+ If unsure, say Y.
+
+config MODULE_UNLOAD
+ bool "Module unloading"
+ depends on MODULES
+ help
+ Without this option you will not be able to unload any
+ modules (note that some modules may not be unloadable
+ anyway), which makes your kernel slightly smaller and
+ simpler. If unsure, say Y.
+
+config MODULE_FORCE_UNLOAD
+ bool "Forced module unloading"
+ depends on MODULE_UNLOAD && EXPERIMENTAL
+ help
+ This option allows you to force a module to unload, even if the
+ kernel believes it is unsafe: the kernel will remove the module
+ without waiting for anyone to stop using it (using the -f option to
+ rmmod). This is mainly for kernel developers and desperate users.
+ If unsure, say N.
+
+config OBSOLETE_MODPARM
+ bool
+ default y
+ depends on MODULES
+ help
+ You need this option to use module parameters on modules which
+ have not been converted to the new module parameter system yet.
+ If unsure, say Y.
+
+config MODVERSIONS
+ bool "Module versioning support (EXPERIMENTAL)"
+ depends on MODULES && EXPERIMENTAL && !UML
+ help
+ Usually, you have to use modules compiled with your kernel.
+ Saying Y here makes it sometimes possible to use modules
+ compiled for different kernels, by adding enough information
+ to the modules to (hopefully) spot any changes which would
+ make them incompatible with the kernel you are running. If
+ unsure, say N.
+
+config MODULE_SRCVERSION_ALL
+ bool "Source checksum for all modules"
+ depends on MODULES
+ help
+ Modules which contain a MODULE_VERSION get an extra "srcversion"
+ field inserted into their modinfo section, which contains a
+ sum of the source files which made it. This helps maintainers
+ see exactly which source was used to build a module (since
+ others sometimes change the module source without updating
+ the version). With this option, such a "srcversion" field
+ will be created for all modules. If unsure, say N.
+
+config KMOD
+ bool "Automatic kernel module loading"
+ depends on MODULES
+ help
+ Normally when you have selected some parts of the kernel to
+ be created as kernel modules, you must load them (using the
+ "modprobe" command) before you can use them. If you say Y
+ here, some parts of the kernel will be able to load modules
+ automatically: when a part of the kernel needs a module, it
+ runs modprobe with the appropriate arguments, thereby
+ loading the module if it is available. If unsure, say Y.
+
+config STOP_MACHINE
+ bool
+ default y
+ depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
+ help
+ Need stop_machine() primitive.
+endmenu
diff --git a/init/Makefile b/init/Makefile
new file mode 100644
index 0000000..93a53fb
--- /dev/null
+++ b/init/Makefile
@@ -0,0 +1,28 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y := main.o version.o mounts.o initramfs.o
+obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
+
+mounts-y := do_mounts.o
+mounts-$(CONFIG_DEVFS_FS) += do_mounts_devfs.o
+mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o
+mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
+mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o
+
+# files to be removed upon make clean
+clean-files := ../include/linux/compile.h
+
+# dependencies on generated files need to be listed explicitly
+
+$(obj)/version.o: include/linux/compile.h
+
+# compile.h changes depending on hostname, generation number, etc,
+# so we regenerate it always.
+# mkcompile_h will make sure to only update the
+# actual file if its content has changed.
+
+include/linux/compile.h: FORCE
+ @echo ' CHK $@'
+ @$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CC) $(CFLAGS)"
diff --git a/init/calibrate.c b/init/calibrate.c
new file mode 100644
index 0000000..c698e04
--- /dev/null
+++ b/init/calibrate.c
@@ -0,0 +1,79 @@
+/* calibrate.c: default delay calibration
+ *
+ * Excised from init/main.c
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+static unsigned long preset_lpj;
+static int __init lpj_setup(char *str)
+{
+ preset_lpj = simple_strtoul(str,NULL,0);
+ return 1;
+}
+
+__setup("lpj=", lpj_setup);
+
+/*
+ * This is the number of bits of precision for the loops_per_jiffy. Each
+ * bit takes on average 1.5/HZ seconds. This (like the original) is a little
+ * better than 1%
+ */
+#define LPS_PREC 8
+
+void __devinit calibrate_delay(void)
+{
+ unsigned long ticks, loopbit;
+ int lps_precision = LPS_PREC;
+
+ if (preset_lpj) {
+ loops_per_jiffy = preset_lpj;
+ printk("Calibrating delay loop (skipped)... "
+ "%lu.%02lu BogoMIPS preset\n",
+ loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ)) % 100);
+ } else {
+ loops_per_jiffy = (1<<12);
+
+ printk(KERN_DEBUG "Calibrating delay loop... ");
+ while ((loops_per_jiffy <<= 1) != 0) {
+ /* wait for "start of" clock tick */
+ ticks = jiffies;
+ while (ticks == jiffies)
+ /* nothing */;
+ /* Go .. */
+ ticks = jiffies;
+ __delay(loops_per_jiffy);
+ ticks = jiffies - ticks;
+ if (ticks)
+ break;
+ }
+
+ /*
+ * Do a binary approximation to get loops_per_jiffy set to
+ * equal one clock (up to lps_precision bits)
+ */
+ loops_per_jiffy >>= 1;
+ loopbit = loops_per_jiffy;
+ while (lps_precision-- && (loopbit >>= 1)) {
+ loops_per_jiffy |= loopbit;
+ ticks = jiffies;
+ while (ticks == jiffies)
+ /* nothing */;
+ ticks = jiffies;
+ __delay(loops_per_jiffy);
+ if (jiffies != ticks) /* longer than 1 tick */
+ loops_per_jiffy &= ~loopbit;
+ }
+
+ /* Round the value and print it */
+ printk("%lu.%02lu BogoMIPS (lpj=%lu)\n",
+ loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ)) % 100,
+ loops_per_jiffy);
+ }
+
+}
diff --git a/init/do_mounts.c b/init/do_mounts.c
new file mode 100644
index 0000000..b7570c0
--- /dev/null
+++ b/init/do_mounts.c
@@ -0,0 +1,430 @@
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/ctype.h>
+#include <linux/fd.h>
+#include <linux/tty.h>
+#include <linux/suspend.h>
+#include <linux/root_dev.h>
+#include <linux/security.h>
+#include <linux/delay.h>
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/nfs_mount.h>
+
+#include "do_mounts.h"
+
+extern int get_filesystem_list(char * buf);
+
+int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
+
+int root_mountflags = MS_RDONLY | MS_VERBOSE;
+char * __initdata root_device_name;
+static char __initdata saved_root_name[64];
+
+/* this is initialized in init/main.c */
+dev_t ROOT_DEV;
+
+EXPORT_SYMBOL(ROOT_DEV);
+
+static int __init load_ramdisk(char *str)
+{
+ rd_doload = simple_strtol(str,NULL,0) & 3;
+ return 1;
+}
+__setup("load_ramdisk=", load_ramdisk);
+
+static int __init readonly(char *str)
+{
+ if (*str)
+ return 0;
+ root_mountflags |= MS_RDONLY;
+ return 1;
+}
+
+static int __init readwrite(char *str)
+{
+ if (*str)
+ return 0;
+ root_mountflags &= ~MS_RDONLY;
+ return 1;
+}
+
+__setup("ro", readonly);
+__setup("rw", readwrite);
+
+static dev_t try_name(char *name, int part)
+{
+ char path[64];
+ char buf[32];
+ int range;
+ dev_t res;
+ char *s;
+ int len;
+ int fd;
+ unsigned int maj, min;
+
+ /* read device number from .../dev */
+
+ sprintf(path, "/sys/block/%s/dev", name);
+ fd = sys_open(path, 0, 0);
+ if (fd < 0)
+ goto fail;
+ len = sys_read(fd, buf, 32);
+ sys_close(fd);
+ if (len <= 0 || len == 32 || buf[len - 1] != '\n')
+ goto fail;
+ buf[len - 1] = '\0';
+ if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
+ /*
+ * Try the %u:%u format -- see print_dev_t()
+ */
+ res = MKDEV(maj, min);
+ if (maj != MAJOR(res) || min != MINOR(res))
+ goto fail;
+ } else {
+ /*
+ * Nope. Try old-style "0321"
+ */
+ res = new_decode_dev(simple_strtoul(buf, &s, 16));
+ if (*s)
+ goto fail;
+ }
+
+ /* if it's there and we are not looking for a partition - that's it */
+ if (!part)
+ return res;
+
+ /* otherwise read range from .../range */
+ sprintf(path, "/sys/block/%s/range", name);
+ fd = sys_open(path, 0, 0);
+ if (fd < 0)
+ goto fail;
+ len = sys_read(fd, buf, 32);
+ sys_close(fd);
+ if (len <= 0 || len == 32 || buf[len - 1] != '\n')
+ goto fail;
+ buf[len - 1] = '\0';
+ range = simple_strtoul(buf, &s, 10);
+ if (*s)
+ goto fail;
+
+ /* if partition is within range - we got it */
+ if (part < range)
+ return res + part;
+fail:
+ return 0;
+}
+
+/*
+ * Convert a name into device number. We accept the following variants:
+ *
+ * 1) device number in hexadecimal represents itself
+ * 2) /dev/nfs represents Root_NFS (0xff)
+ * 3) /dev/<disk_name> represents the device number of disk
+ * 4) /dev/<disk_name><decimal> represents the device number
+ * of partition - device number of disk plus the partition number
+ * 5) /dev/<disk_name>p<decimal> - same as the above, that form is
+ * used when disk name of partitioned disk ends on a digit.
+ *
+ * If name doesn't have fall into the categories above, we return 0.
+ * Driverfs is used to check if something is a disk name - it has
+ * all known disks under bus/block/devices. If the disk name
+ * contains slashes, name of driverfs node has them replaced with
+ * bangs. try_name() does the actual checks, assuming that driverfs
+ * is mounted on rootfs /sys.
+ */
+
+dev_t name_to_dev_t(char *name)
+{
+ char s[32];
+ char *p;
+ dev_t res = 0;
+ int part;
+
+#ifdef CONFIG_SYSFS
+ int mkdir_err = sys_mkdir("/sys", 0700);
+ if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
+ goto out;
+#endif
+
+ if (strncmp(name, "/dev/", 5) != 0) {
+ unsigned maj, min;
+
+ if (sscanf(name, "%u:%u", &maj, &min) == 2) {
+ res = MKDEV(maj, min);
+ if (maj != MAJOR(res) || min != MINOR(res))
+ goto fail;
+ } else {
+ res = new_decode_dev(simple_strtoul(name, &p, 16));
+ if (*p)
+ goto fail;
+ }
+ goto done;
+ }
+ name += 5;
+ res = Root_NFS;
+ if (strcmp(name, "nfs") == 0)
+ goto done;
+ res = Root_RAM0;
+ if (strcmp(name, "ram") == 0)
+ goto done;
+
+ if (strlen(name) > 31)
+ goto fail;
+ strcpy(s, name);
+ for (p = s; *p; p++)
+ if (*p == '/')
+ *p = '!';
+ res = try_name(s, 0);
+ if (res)
+ goto done;
+
+ while (p > s && isdigit(p[-1]))
+ p--;
+ if (p == s || !*p || *p == '0')
+ goto fail;
+ part = simple_strtoul(p, NULL, 10);
+ *p = '\0';
+ res = try_name(s, part);
+ if (res)
+ goto done;
+
+ if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
+ goto fail;
+ p[-1] = '\0';
+ res = try_name(s, part);
+done:
+#ifdef CONFIG_SYSFS
+ sys_umount("/sys", 0);
+out:
+ if (!mkdir_err)
+ sys_rmdir("/sys");
+#endif
+ return res;
+fail:
+ res = 0;
+ goto done;
+}
+
+static int __init root_dev_setup(char *line)
+{
+ strlcpy(saved_root_name, line, sizeof(saved_root_name));
+ return 1;
+}
+
+__setup("root=", root_dev_setup);
+
+static char * __initdata root_mount_data;
+static int __init root_data_setup(char *str)
+{
+ root_mount_data = str;
+ return 1;
+}
+
+static char * __initdata root_fs_names;
+static int __init fs_names_setup(char *str)
+{
+ root_fs_names = str;
+ return 1;
+}
+
+static unsigned int __initdata root_delay;
+static int __init root_delay_setup(char *str)
+{
+ root_delay = simple_strtoul(str, NULL, 0);
+ return 1;
+}
+
+__setup("rootflags=", root_data_setup);
+__setup("rootfstype=", fs_names_setup);
+__setup("rootdelay=", root_delay_setup);
+
+static void __init get_fs_names(char *page)
+{
+ char *s = page;
+
+ if (root_fs_names) {
+ strcpy(page, root_fs_names);
+ while (*s++) {
+ if (s[-1] == ',')
+ s[-1] = '\0';
+ }
+ } else {
+ int len = get_filesystem_list(page);
+ char *p, *next;
+
+ page[len] = '\0';
+ for (p = page-1; p; p = next) {
+ next = strchr(++p, '\n');
+ if (*p++ != '\t')
+ continue;
+ while ((*s++ = *p++) != '\n')
+ ;
+ s[-1] = '\0';
+ }
+ }
+ *s = '\0';
+}
+
+static int __init do_mount_root(char *name, char *fs, int flags, void *data)
+{
+ int err = sys_mount(name, "/root", fs, flags, data);
+ if (err)
+ return err;
+
+ sys_chdir("/root");
+ ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
+ printk("VFS: Mounted root (%s filesystem)%s.\n",
+ current->fs->pwdmnt->mnt_sb->s_type->name,
+ current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY ?
+ " readonly" : "");
+ return 0;
+}
+
+void __init mount_block_root(char *name, int flags)
+{
+ char *fs_names = __getname();
+ char *p;
+ char b[BDEVNAME_SIZE];
+
+ get_fs_names(fs_names);
+retry:
+ for (p = fs_names; *p; p += strlen(p)+1) {
+ int err = do_mount_root(name, p, flags, root_mount_data);
+ switch (err) {
+ case 0:
+ goto out;
+ case -EACCES:
+ flags |= MS_RDONLY;
+ goto retry;
+ case -EINVAL:
+ continue;
+ }
+ /*
+ * Allow the user to distinguish between failed sys_open
+ * and bad superblock on root device.
+ */
+ __bdevname(ROOT_DEV, b);
+ printk("VFS: Cannot open root device \"%s\" or %s\n",
+ root_device_name, b);
+ printk("Please append a correct \"root=\" boot option\n");
+
+ panic("VFS: Unable to mount root fs on %s", b);
+ }
+ panic("VFS: Unable to mount root fs on %s", __bdevname(ROOT_DEV, b));
+out:
+ putname(fs_names);
+}
+
+#ifdef CONFIG_ROOT_NFS
+static int __init mount_nfs_root(void)
+{
+ void *data = nfs_root_data();
+
+ create_dev("/dev/root", ROOT_DEV, NULL);
+ if (data &&
+ do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
+ return 1;
+ return 0;
+}
+#endif
+
+#if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD)
+void __init change_floppy(char *fmt, ...)
+{
+ struct termios termios;
+ char buf[80];
+ char c;
+ int fd;
+ va_list args;
+ va_start(args, fmt);
+ vsprintf(buf, fmt, args);
+ va_end(args);
+ fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0);
+ if (fd >= 0) {
+ sys_ioctl(fd, FDEJECT, 0);
+ sys_close(fd);
+ }
+ printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
+ fd = sys_open("/dev/console", O_RDWR, 0);
+ if (fd >= 0) {
+ sys_ioctl(fd, TCGETS, (long)&termios);
+ termios.c_lflag &= ~ICANON;
+ sys_ioctl(fd, TCSETSF, (long)&termios);
+ sys_read(fd, &c, 1);
+ termios.c_lflag |= ICANON;
+ sys_ioctl(fd, TCSETSF, (long)&termios);
+ sys_close(fd);
+ }
+}
+#endif
+
+void __init mount_root(void)
+{
+#ifdef CONFIG_ROOT_NFS
+ if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
+ if (mount_nfs_root())
+ return;
+
+ printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
+ ROOT_DEV = Root_FD0;
+ }
+#endif
+#ifdef CONFIG_BLK_DEV_FD
+ if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
+ /* rd_doload is 2 for a dual initrd/ramload setup */
+ if (rd_doload==2) {
+ if (rd_load_disk(1)) {
+ ROOT_DEV = Root_RAM1;
+ root_device_name = NULL;
+ }
+ } else
+ change_floppy("root floppy");
+ }
+#endif
+ create_dev("/dev/root", ROOT_DEV, root_device_name);
+ mount_block_root("/dev/root", root_mountflags);
+}
+
+/*
+ * Prepare the namespace - decide what/where to mount, load ramdisks, etc.
+ */
+void __init prepare_namespace(void)
+{
+ int is_floppy;
+
+ mount_devfs();
+
+ if (root_delay) {
+ printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
+ root_delay);
+ ssleep(root_delay);
+ }
+
+ md_run_setup();
+
+ if (saved_root_name[0]) {
+ root_device_name = saved_root_name;
+ ROOT_DEV = name_to_dev_t(root_device_name);
+ if (strncmp(root_device_name, "/dev/", 5) == 0)
+ root_device_name += 5;
+ }
+
+ is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
+
+ if (initrd_load())
+ goto out;
+
+ if (is_floppy && rd_doload && rd_load_disk(0))
+ ROOT_DEV = Root_RAM0;
+
+ mount_root();
+out:
+ umount_devfs("/dev");
+ sys_mount(".", "/", NULL, MS_MOVE, NULL);
+ sys_chroot(".");
+ security_sb_post_mountroot();
+ mount_devfs_fs ();
+}
+
diff --git a/init/do_mounts.h b/init/do_mounts.h
new file mode 100644
index 0000000..de92bee
--- /dev/null
+++ b/init/do_mounts.h
@@ -0,0 +1,92 @@
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/init.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/mount.h>
+#include <linux/major.h>
+#include <linux/root_dev.h>
+
+dev_t name_to_dev_t(char *name);
+void change_floppy(char *fmt, ...);
+void mount_block_root(char *name, int flags);
+void mount_root(void);
+extern int root_mountflags;
+extern char *root_device_name;
+
+#ifdef CONFIG_DEVFS_FS
+
+void mount_devfs(void);
+void umount_devfs(char *path);
+int create_dev(char *name, dev_t dev, char *devfs_name);
+
+#else
+
+static inline void mount_devfs(void) {}
+static inline void umount_devfs(const char *path) {}
+
+static inline int create_dev(char *name, dev_t dev, char *devfs_name)
+{
+ sys_unlink(name);
+ return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
+}
+
+#endif
+
+#if BITS_PER_LONG == 32
+static inline u32 bstat(char *name)
+{
+ struct stat64 stat;
+ if (sys_stat64(name, &stat) != 0)
+ return 0;
+ if (!S_ISBLK(stat.st_mode))
+ return 0;
+ if (stat.st_rdev != (u32)stat.st_rdev)
+ return 0;
+ return stat.st_rdev;
+}
+#else
+static inline u32 bstat(char *name)
+{
+ struct stat stat;
+ if (sys_newstat(name, &stat) != 0)
+ return 0;
+ if (!S_ISBLK(stat.st_mode))
+ return 0;
+ return stat.st_rdev;
+}
+#endif
+
+#ifdef CONFIG_BLK_DEV_RAM
+
+int __init rd_load_disk(int n);
+int __init rd_load_image(char *from);
+
+#else
+
+static inline int rd_load_disk(int n) { return 0; }
+static inline int rd_load_image(char *from) { return 0; }
+
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+
+int __init initrd_load(void);
+
+#else
+
+static inline int initrd_load(void) { return 0; }
+
+#endif
+
+#ifdef CONFIG_BLK_DEV_MD
+
+void md_run_setup(void);
+
+#else
+
+static inline void md_run_setup(void) {}
+
+#endif
diff --git a/init/do_mounts_devfs.c b/init/do_mounts_devfs.c
new file mode 100644
index 0000000..cc52647
--- /dev/null
+++ b/init/do_mounts_devfs.c
@@ -0,0 +1,137 @@
+
+#include <linux/kernel.h>
+#include <linux/dirent.h>
+#include <linux/string.h>
+
+#include "do_mounts.h"
+
+void __init mount_devfs(void)
+{
+ sys_mount("devfs", "/dev", "devfs", 0, NULL);
+}
+
+void __init umount_devfs(char *path)
+{
+ sys_umount(path, 0);
+}
+
+/*
+ * If the dir will fit in *buf, return its length. If it won't fit, return
+ * zero. Return -ve on error.
+ */
+static int __init do_read_dir(int fd, void *buf, int len)
+{
+ long bytes, n;
+ char *p = buf;
+ sys_lseek(fd, 0, 0);
+
+ for (bytes = 0; bytes < len; bytes += n) {
+ n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes),
+ len - bytes);
+ if (n < 0)
+ return n;
+ if (n == 0)
+ return bytes;
+ }
+ return 0;
+}
+
+/*
+ * Try to read all of a directory. Returns the contents at *p, which
+ * is kmalloced memory. Returns the number of bytes read at *len. Returns
+ * NULL on error.
+ */
+static void * __init read_dir(char *path, int *len)
+{
+ int size;
+ int fd = sys_open(path, 0, 0);
+
+ *len = 0;
+ if (fd < 0)
+ return NULL;
+
+ for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) {
+ void *p = kmalloc(size, GFP_KERNEL);
+ int n;
+ if (!p)
+ break;
+ n = do_read_dir(fd, p, size);
+ if (n > 0) {
+ sys_close(fd);
+ *len = n;
+ return p;
+ }
+ kfree(p);
+ if (n == -EINVAL)
+ continue; /* Try a larger buffer */
+ if (n < 0)
+ break;
+ }
+ sys_close(fd);
+ return NULL;
+}
+
+/*
+ * recursively scan <path>, looking for a device node of type <dev>
+ */
+static int __init find_in_devfs(char *path, unsigned dev)
+{
+ char *end = path + strlen(path);
+ int rest = path + 64 - end;
+ int size;
+ char *p = read_dir(path, &size);
+ char *s;
+
+ if (!p)
+ return -1;
+ for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) {
+ struct linux_dirent64 *d = (struct linux_dirent64 *)s;
+ if (strlen(d->d_name) + 2 > rest)
+ continue;
+ switch (d->d_type) {
+ case DT_BLK:
+ sprintf(end, "/%s", d->d_name);
+ if (bstat(path) != dev)
+ break;
+ kfree(p);
+ return 0;
+ case DT_DIR:
+ if (strcmp(d->d_name, ".") == 0)
+ break;
+ if (strcmp(d->d_name, "..") == 0)
+ break;
+ sprintf(end, "/%s", d->d_name);
+ if (find_in_devfs(path, dev) < 0)
+ break;
+ kfree(p);
+ return 0;
+ }
+ }
+ kfree(p);
+ return -1;
+}
+
+/*
+ * create a device node called <name> which points to
+ * <devfs_name> if possible, otherwise find a device node
+ * which matches <dev> and make <name> a symlink pointing to it.
+ */
+int __init create_dev(char *name, dev_t dev, char *devfs_name)
+{
+ char path[64];
+
+ sys_unlink(name);
+ if (devfs_name && devfs_name[0]) {
+ if (strncmp(devfs_name, "/dev/", 5) == 0)
+ devfs_name += 5;
+ sprintf(path, "/dev/%s", devfs_name);
+ if (sys_access(path, 0) == 0)
+ return sys_symlink(devfs_name, name);
+ }
+ if (!dev)
+ return -1;
+ strcpy(path, "/dev");
+ if (find_in_devfs(path, new_encode_dev(dev)) < 0)
+ return -1;
+ return sys_symlink(path + 5, name);
+}
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
new file mode 100644
index 0000000..07e7d31
--- /dev/null
+++ b/init/do_mounts_initrd.c
@@ -0,0 +1,121 @@
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/minix_fs.h>
+#include <linux/ext2_fs.h>
+#include <linux/romfs_fs.h>
+#include <linux/initrd.h>
+#include <linux/sched.h>
+
+#include "do_mounts.h"
+
+unsigned long initrd_start, initrd_end;
+int initrd_below_start_ok;
+unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
+static int __initdata old_fd, root_fd;
+static int __initdata mount_initrd = 1;
+
+static int __init no_initrd(char *str)
+{
+ mount_initrd = 0;
+ return 1;
+}
+
+__setup("noinitrd", no_initrd);
+
+static int __init do_linuxrc(void * shell)
+{
+ static char *argv[] = { "linuxrc", NULL, };
+ extern char * envp_init[];
+
+ sys_close(old_fd);sys_close(root_fd);
+ sys_close(0);sys_close(1);sys_close(2);
+ sys_setsid();
+ (void) sys_open("/dev/console",O_RDWR,0);
+ (void) sys_dup(0);
+ (void) sys_dup(0);
+ return execve(shell, argv, envp_init);
+}
+
+static void __init handle_initrd(void)
+{
+ int error;
+ int i, pid;
+
+ real_root_dev = new_encode_dev(ROOT_DEV);
+ create_dev("/dev/root.old", Root_RAM0, NULL);
+ /* mount initrd on rootfs' /root */
+ mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
+ sys_mkdir("/old", 0700);
+ root_fd = sys_open("/", 0, 0);
+ old_fd = sys_open("/old", 0, 0);
+ /* move initrd over / and chdir/chroot in initrd root */
+ sys_chdir("/root");
+ sys_mount(".", "/", NULL, MS_MOVE, NULL);
+ sys_chroot(".");
+ mount_devfs_fs ();
+
+ pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
+ if (pid > 0) {
+ while (pid != sys_wait4(-1, &i, 0, NULL))
+ yield();
+ }
+
+ /* move initrd to rootfs' /old */
+ sys_fchdir(old_fd);
+ sys_mount("/", ".", NULL, MS_MOVE, NULL);
+ /* switch root and cwd back to / of rootfs */
+ sys_fchdir(root_fd);
+ sys_chroot(".");
+ sys_close(old_fd);
+ sys_close(root_fd);
+ umount_devfs("/old/dev");
+
+ if (new_decode_dev(real_root_dev) == Root_RAM0) {
+ sys_chdir("/old");
+ return;
+ }
+
+ ROOT_DEV = new_decode_dev(real_root_dev);
+ mount_root();
+
+ printk(KERN_NOTICE "Trying to move old root to /initrd ... ");
+ error = sys_mount("/old", "/root/initrd", NULL, MS_MOVE, NULL);
+ if (!error)
+ printk("okay\n");
+ else {
+ int fd = sys_open("/dev/root.old", O_RDWR, 0);
+ printk("failed\n");
+ printk(KERN_NOTICE "Unmounting old root\n");
+ sys_umount("/old", MNT_DETACH);
+ printk(KERN_NOTICE "Trying to free ramdisk memory ... ");
+ if (fd < 0) {
+ error = fd;
+ } else {
+ error = sys_ioctl(fd, BLKFLSBUF, 0);
+ sys_close(fd);
+ }
+ printk(!error ? "okay\n" : "failed\n");
+ }
+}
+
+int __init initrd_load(void)
+{
+ if (mount_initrd) {
+ create_dev("/dev/ram", Root_RAM0, NULL);
+ /*
+ * Load the initrd data into /dev/ram0. Execute it as initrd
+ * unless /dev/ram0 is supposed to be our actual root device,
+ * in that case the ram disk is just set up here, and gets
+ * mounted in the normal path.
+ */
+ if (rd_load_image("/initrd.image") && ROOT_DEV != Root_RAM0) {
+ sys_unlink("/initrd.image");
+ handle_initrd();
+ return 1;
+ }
+ }
+ sys_unlink("/initrd.image");
+ return 0;
+}
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
new file mode 100644
index 0000000..3fbc355
--- /dev/null
+++ b/init/do_mounts_md.c
@@ -0,0 +1,290 @@
+
+#include <linux/raid/md.h>
+
+#include "do_mounts.h"
+
+/*
+ * When md (and any require personalities) are compiled into the kernel
+ * (not a module), arrays can be assembles are boot time using with AUTODETECT
+ * where specially marked partitions are registered with md_autodetect_dev(),
+ * and with MD_BOOT where devices to be collected are given on the boot line
+ * with md=.....
+ * The code for that is here.
+ */
+
+static int __initdata raid_noautodetect, raid_autopart;
+
+static struct {
+ int minor;
+ int partitioned;
+ int pers;
+ int chunk;
+ char *device_names;
+} md_setup_args[MAX_MD_DEVS] __initdata;
+
+static int md_setup_ents __initdata;
+
+extern int mdp_major;
+/*
+ * Parse the command-line parameters given our kernel, but do not
+ * actually try to invoke the MD device now; that is handled by
+ * md_setup_drive after the low-level disk drivers have initialised.
+ *
+ * 27/11/1999: Fixed to work correctly with the 2.3 kernel (which
+ * assigns the task of parsing integer arguments to the
+ * invoked program now). Added ability to initialise all
+ * the MD devices (by specifying multiple "md=" lines)
+ * instead of just one. -- KTK
+ * 18May2000: Added support for persistent-superblock arrays:
+ * md=n,0,factor,fault,device-list uses RAID0 for device n
+ * md=n,-1,factor,fault,device-list uses LINEAR for device n
+ * md=n,device-list reads a RAID superblock from the devices
+ * elements in device-list are read by name_to_kdev_t so can be
+ * a hex number or something like /dev/hda1 /dev/sdb
+ * 2001-06-03: Dave Cinege <dcinege@psychosis.com>
+ * Shifted name_to_kdev_t() and related operations to md_set_drive()
+ * for later execution. Rewrote section to make devfs compatible.
+ */
+static int __init md_setup(char *str)
+{
+ int minor, level, factor, fault, pers, partitioned = 0;
+ char *pername = "";
+ char *str1;
+ int ent;
+
+ if (*str == 'd') {
+ partitioned = 1;
+ str++;
+ }
+ if (get_option(&str, &minor) != 2) { /* MD Number */
+ printk(KERN_WARNING "md: Too few arguments supplied to md=.\n");
+ return 0;
+ }
+ str1 = str;
+ if (minor >= MAX_MD_DEVS) {
+ printk(KERN_WARNING "md: md=%d, Minor device number too high.\n", minor);
+ return 0;
+ }
+ for (ent=0 ; ent< md_setup_ents ; ent++)
+ if (md_setup_args[ent].minor == minor &&
+ md_setup_args[ent].partitioned == partitioned) {
+ printk(KERN_WARNING "md: md=%s%d, Specified more than once. "
+ "Replacing previous definition.\n", partitioned?"d":"", minor);
+ break;
+ }
+ if (ent >= MAX_MD_DEVS) {
+ printk(KERN_WARNING "md: md=%s%d - too many md initialisations\n", partitioned?"d":"", minor);
+ return 0;
+ }
+ if (ent >= md_setup_ents)
+ md_setup_ents++;
+ switch (get_option(&str, &level)) { /* RAID Personality */
+ case 2: /* could be 0 or -1.. */
+ if (level == 0 || level == LEVEL_LINEAR) {
+ if (get_option(&str, &factor) != 2 || /* Chunk Size */
+ get_option(&str, &fault) != 2) {
+ printk(KERN_WARNING "md: Too few arguments supplied to md=.\n");
+ return 0;
+ }
+ md_setup_args[ent].pers = level;
+ md_setup_args[ent].chunk = 1 << (factor+12);
+ if (level == LEVEL_LINEAR) {
+ pers = LINEAR;
+ pername = "linear";
+ } else {
+ pers = RAID0;
+ pername = "raid0";
+ }
+ md_setup_args[ent].pers = pers;
+ break;
+ }
+ /* FALL THROUGH */
+ case 1: /* the first device is numeric */
+ str = str1;
+ /* FALL THROUGH */
+ case 0:
+ md_setup_args[ent].pers = 0;
+ pername="super-block";
+ }
+
+ printk(KERN_INFO "md: Will configure md%d (%s) from %s, below.\n",
+ minor, pername, str);
+ md_setup_args[ent].device_names = str;
+ md_setup_args[ent].partitioned = partitioned;
+ md_setup_args[ent].minor = minor;
+
+ return 1;
+}
+
+#define MdpMinorShift 6
+
+static void __init md_setup_drive(void)
+{
+ int minor, i, ent, partitioned;
+ dev_t dev;
+ dev_t devices[MD_SB_DISKS+1];
+
+ for (ent = 0; ent < md_setup_ents ; ent++) {
+ int fd;
+ int err = 0;
+ char *devname;
+ mdu_disk_info_t dinfo;
+ char name[16], devfs_name[16];
+
+ minor = md_setup_args[ent].minor;
+ partitioned = md_setup_args[ent].partitioned;
+ devname = md_setup_args[ent].device_names;
+
+ sprintf(name, "/dev/md%s%d", partitioned?"_d":"", minor);
+ sprintf(devfs_name, "/dev/md/%s%d", partitioned?"d":"", minor);
+ if (partitioned)
+ dev = MKDEV(mdp_major, minor << MdpMinorShift);
+ else
+ dev = MKDEV(MD_MAJOR, minor);
+ create_dev(name, dev, devfs_name);
+ for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
+ char *p;
+ char comp_name[64];
+ u32 rdev;
+
+ p = strchr(devname, ',');
+ if (p)
+ *p++ = 0;
+
+ dev = name_to_dev_t(devname);
+ if (strncmp(devname, "/dev/", 5) == 0)
+ devname += 5;
+ snprintf(comp_name, 63, "/dev/%s", devname);
+ rdev = bstat(comp_name);
+ if (rdev)
+ dev = new_decode_dev(rdev);
+ if (!dev) {
+ printk(KERN_WARNING "md: Unknown device name: %s\n", devname);
+ break;
+ }
+
+ devices[i] = dev;
+
+ devname = p;
+ }
+ devices[i] = 0;
+
+ if (!i)
+ continue;
+
+ printk(KERN_INFO "md: Loading md%s%d: %s\n",
+ partitioned ? "_d" : "", minor,
+ md_setup_args[ent].device_names);
+
+ fd = sys_open(name, 0, 0);
+ if (fd < 0) {
+ printk(KERN_ERR "md: open failed - cannot start "
+ "array %s\n", name);
+ continue;
+ }
+ if (sys_ioctl(fd, SET_ARRAY_INFO, 0) == -EBUSY) {
+ printk(KERN_WARNING
+ "md: Ignoring md=%d, already autodetected. (Use raid=noautodetect)\n",
+ minor);
+ sys_close(fd);
+ continue;
+ }
+
+ if (md_setup_args[ent].pers) {
+ /* non-persistent */
+ mdu_array_info_t ainfo;
+ ainfo.level = pers_to_level(md_setup_args[ent].pers);
+ ainfo.size = 0;
+ ainfo.nr_disks =0;
+ ainfo.raid_disks =0;
+ while (devices[ainfo.raid_disks])
+ ainfo.raid_disks++;
+ ainfo.md_minor =minor;
+ ainfo.not_persistent = 1;
+
+ ainfo.state = (1 << MD_SB_CLEAN);
+ ainfo.layout = 0;
+ ainfo.chunk_size = md_setup_args[ent].chunk;
+ err = sys_ioctl(fd, SET_ARRAY_INFO, (long)&ainfo);
+ for (i = 0; !err && i <= MD_SB_DISKS; i++) {
+ dev = devices[i];
+ if (!dev)
+ break;
+ dinfo.number = i;
+ dinfo.raid_disk = i;
+ dinfo.state = (1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC);
+ dinfo.major = MAJOR(dev);
+ dinfo.minor = MINOR(dev);
+ err = sys_ioctl(fd, ADD_NEW_DISK, (long)&dinfo);
+ }
+ } else {
+ /* persistent */
+ for (i = 0; i <= MD_SB_DISKS; i++) {
+ dev = devices[i];
+ if (!dev)
+ break;
+ dinfo.major = MAJOR(dev);
+ dinfo.minor = MINOR(dev);
+ sys_ioctl(fd, ADD_NEW_DISK, (long)&dinfo);
+ }
+ }
+ if (!err)
+ err = sys_ioctl(fd, RUN_ARRAY, 0);
+ if (err)
+ printk(KERN_WARNING "md: starting md%d failed\n", minor);
+ else {
+ /* reread the partition table.
+ * I (neilb) and not sure why this is needed, but I cannot
+ * boot a kernel with devfs compiled in from partitioned md
+ * array without it
+ */
+ sys_close(fd);
+ fd = sys_open(name, 0, 0);
+ sys_ioctl(fd, BLKRRPART, 0);
+ }
+ sys_close(fd);
+ }
+}
+
+static int __init raid_setup(char *str)
+{
+ int len, pos;
+
+ len = strlen(str) + 1;
+ pos = 0;
+
+ while (pos < len) {
+ char *comma = strchr(str+pos, ',');
+ int wlen;
+ if (comma)
+ wlen = (comma-str)-pos;
+ else wlen = (len-1)-pos;
+
+ if (!strncmp(str, "noautodetect", wlen))
+ raid_noautodetect = 1;
+ if (strncmp(str, "partitionable", wlen)==0)
+ raid_autopart = 1;
+ if (strncmp(str, "part", wlen)==0)
+ raid_autopart = 1;
+ pos += wlen+1;
+ }
+ return 1;
+}
+
+__setup("raid=", raid_setup);
+__setup("md=", md_setup);
+
+void __init md_run_setup(void)
+{
+ create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0");
+ if (raid_noautodetect)
+ printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
+ else {
+ int fd = sys_open("/dev/md0", 0, 0);
+ if (fd >= 0) {
+ sys_ioctl(fd, RAID_AUTORUN, raid_autopart);
+ sys_close(fd);
+ }
+ }
+ md_setup_drive();
+}
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
new file mode 100644
index 0000000..c10b08a
--- /dev/null
+++ b/init/do_mounts_rd.c
@@ -0,0 +1,429 @@
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/minix_fs.h>
+#include <linux/ext2_fs.h>
+#include <linux/romfs_fs.h>
+#include <linux/cramfs_fs.h>
+#include <linux/initrd.h>
+#include <linux/string.h>
+
+#include "do_mounts.h"
+
+#define BUILD_CRAMDISK
+
+int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */
+
+static int __init prompt_ramdisk(char *str)
+{
+ rd_prompt = simple_strtol(str,NULL,0) & 1;
+ return 1;
+}
+__setup("prompt_ramdisk=", prompt_ramdisk);
+
+int __initdata rd_image_start; /* starting block # of image */
+
+static int __init ramdisk_start_setup(char *str)
+{
+ rd_image_start = simple_strtol(str,NULL,0);
+ return 1;
+}
+__setup("ramdisk_start=", ramdisk_start_setup);
+
+static int __init crd_load(int in_fd, int out_fd);
+
+/*
+ * This routine tries to find a RAM disk image to load, and returns the
+ * number of blocks to read for a non-compressed image, 0 if the image
+ * is a compressed image, and -1 if an image with the right magic
+ * numbers could not be found.
+ *
+ * We currently check for the following magic numbers:
+ * minix
+ * ext2
+ * romfs
+ * cramfs
+ * gzip
+ */
+static int __init
+identify_ramdisk_image(int fd, int start_block)
+{
+ const int size = 512;
+ struct minix_super_block *minixsb;
+ struct ext2_super_block *ext2sb;
+ struct romfs_super_block *romfsb;
+ struct cramfs_super *cramfsb;
+ int nblocks = -1;
+ unsigned char *buf;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (buf == 0)
+ return -1;
+
+ minixsb = (struct minix_super_block *) buf;
+ ext2sb = (struct ext2_super_block *) buf;
+ romfsb = (struct romfs_super_block *) buf;
+ cramfsb = (struct cramfs_super *) buf;
+ memset(buf, 0xe5, size);
+
+ /*
+ * Read block 0 to test for gzipped kernel
+ */
+ sys_lseek(fd, start_block * BLOCK_SIZE, 0);
+ sys_read(fd, buf, size);
+
+ /*
+ * If it matches the gzip magic numbers, return -1
+ */
+ if (buf[0] == 037 && ((buf[1] == 0213) || (buf[1] == 0236))) {
+ printk(KERN_NOTICE
+ "RAMDISK: Compressed image found at block %d\n",
+ start_block);
+ nblocks = 0;
+ goto done;
+ }
+
+ /* romfs is at block zero too */
+ if (romfsb->word0 == ROMSB_WORD0 &&
+ romfsb->word1 == ROMSB_WORD1) {
+ printk(KERN_NOTICE
+ "RAMDISK: romfs filesystem found at block %d\n",
+ start_block);
+ nblocks = (ntohl(romfsb->size)+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+ goto done;
+ }
+
+ if (cramfsb->magic == CRAMFS_MAGIC) {
+ printk(KERN_NOTICE
+ "RAMDISK: cramfs filesystem found at block %d\n",
+ start_block);
+ nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
+ goto done;
+ }
+
+ /*
+ * Read block 1 to test for minix and ext2 superblock
+ */
+ sys_lseek(fd, (start_block+1) * BLOCK_SIZE, 0);
+ sys_read(fd, buf, size);
+
+ /* Try minix */
+ if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
+ minixsb->s_magic == MINIX_SUPER_MAGIC2) {
+ printk(KERN_NOTICE
+ "RAMDISK: Minix filesystem found at block %d\n",
+ start_block);
+ nblocks = minixsb->s_nzones << minixsb->s_log_zone_size;
+ goto done;
+ }
+
+ /* Try ext2 */
+ if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+ printk(KERN_NOTICE
+ "RAMDISK: ext2 filesystem found at block %d\n",
+ start_block);
+ nblocks = le32_to_cpu(ext2sb->s_blocks_count) <<
+ le32_to_cpu(ext2sb->s_log_block_size);
+ goto done;
+ }
+
+ printk(KERN_NOTICE
+ "RAMDISK: Couldn't find valid RAM disk image starting at %d.\n",
+ start_block);
+
+done:
+ sys_lseek(fd, start_block * BLOCK_SIZE, 0);
+ kfree(buf);
+ return nblocks;
+}
+
+int __init rd_load_image(char *from)
+{
+ int res = 0;
+ int in_fd, out_fd;
+ unsigned long rd_blocks, devblocks;
+ int nblocks, i, disk;
+ char *buf = NULL;
+ unsigned short rotate = 0;
+#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES)
+ char rotator[4] = { '|' , '/' , '-' , '\\' };
+#endif
+
+ out_fd = sys_open("/dev/ram", O_RDWR, 0);
+ if (out_fd < 0)
+ goto out;
+
+ in_fd = sys_open(from, O_RDONLY, 0);
+ if (in_fd < 0)
+ goto noclose_input;
+
+ nblocks = identify_ramdisk_image(in_fd, rd_image_start);
+ if (nblocks < 0)
+ goto done;
+
+ if (nblocks == 0) {
+#ifdef BUILD_CRAMDISK
+ if (crd_load(in_fd, out_fd) == 0)
+ goto successful_load;
+#else
+ printk(KERN_NOTICE
+ "RAMDISK: Kernel does not support compressed "
+ "RAM disk images\n");
+#endif
+ goto done;
+ }
+
+ /*
+ * NOTE NOTE: nblocks is not actually blocks but
+ * the number of kibibytes of data to load into a ramdisk.
+ * So any ramdisk block size that is a multiple of 1KiB should
+ * work when the appropriate ramdisk_blocksize is specified
+ * on the command line.
+ *
+ * The default ramdisk_blocksize is 1KiB and it is generally
+ * silly to use anything else, so make sure to use 1KiB
+ * blocksize while generating ext2fs ramdisk-images.
+ */
+ if (sys_ioctl(out_fd, BLKGETSIZE, (unsigned long)&rd_blocks) < 0)
+ rd_blocks = 0;
+ else
+ rd_blocks >>= 1;
+
+ if (nblocks > rd_blocks) {
+ printk("RAMDISK: image too big! (%dKiB/%ldKiB)\n",
+ nblocks, rd_blocks);
+ goto done;
+ }
+
+ /*
+ * OK, time to copy in the data
+ */
+ if (sys_ioctl(in_fd, BLKGETSIZE, (unsigned long)&devblocks) < 0)
+ devblocks = 0;
+ else
+ devblocks >>= 1;
+
+ if (strcmp(from, "/initrd.image") == 0)
+ devblocks = nblocks;
+
+ if (devblocks == 0) {
+ printk(KERN_ERR "RAMDISK: could not determine device size\n");
+ goto done;
+ }
+
+ buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
+ if (buf == 0) {
+ printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
+ goto done;
+ }
+
+ printk(KERN_NOTICE "RAMDISK: Loading %dKiB [%ld disk%s] into ram disk... ",
+ nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : "");
+ for (i = 0, disk = 1; i < nblocks; i++) {
+ if (i && (i % devblocks == 0)) {
+ printk("done disk #%d.\n", disk++);
+ rotate = 0;
+ if (sys_close(in_fd)) {
+ printk("Error closing the disk.\n");
+ goto noclose_input;
+ }
+ change_floppy("disk #%d", disk);
+ in_fd = sys_open(from, O_RDONLY, 0);
+ if (in_fd < 0) {
+ printk("Error opening disk.\n");
+ goto noclose_input;
+ }
+ printk("Loading disk #%d... ", disk);
+ }
+ sys_read(in_fd, buf, BLOCK_SIZE);
+ sys_write(out_fd, buf, BLOCK_SIZE);
+#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES)
+ if (!(i % 16)) {
+ printk("%c\b", rotator[rotate & 0x3]);
+ rotate++;
+ }
+#endif
+ }
+ printk("done.\n");
+
+successful_load:
+ res = 1;
+done:
+ sys_close(in_fd);
+noclose_input:
+ sys_close(out_fd);
+out:
+ kfree(buf);
+ sys_unlink("/dev/ram");
+ return res;
+}
+
+int __init rd_load_disk(int n)
+{
+ if (rd_prompt)
+ change_floppy("root floppy disk to be loaded into RAM disk");
+ create_dev("/dev/root", ROOT_DEV, root_device_name);
+ create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n), NULL);
+ return rd_load_image("/dev/root");
+}
+
+#ifdef BUILD_CRAMDISK
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args) args
+
+#ifndef memzero
+#define memzero(s, n) memset ((s), 0, (n))
+#endif
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+#define INBUFSIZ 4096
+#define WSIZE 0x8000 /* window size--must be a power of two, and */
+ /* at least 32K for zip's deflate method */
+
+static uch *inbuf;
+static uch *window;
+
+static unsigned insize; /* valid bytes in inbuf */
+static unsigned inptr; /* index of next byte to be processed in inbuf */
+static unsigned outcnt; /* bytes in output buffer */
+static int exit_code;
+static int unzip_error;
+static long bytes_out;
+static int crd_infd, crd_outfd;
+
+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+
+/* Diagnostic functions (stubbed out) */
+#define Assert(cond,msg)
+#define Trace(x)
+#define Tracev(x)
+#define Tracevv(x)
+#define Tracec(c,x)
+#define Tracecv(c,x)
+
+#define STATIC static
+#define INIT __init
+
+static int __init fill_inbuf(void);
+static void __init flush_window(void);
+static void __init *malloc(size_t size);
+static void __init free(void *where);
+static void __init error(char *m);
+static void __init gzip_mark(void **);
+static void __init gzip_release(void **);
+
+#include "../lib/inflate.c"
+
+static void __init *malloc(size_t size)
+{
+ return kmalloc(size, GFP_KERNEL);
+}
+
+static void __init free(void *where)
+{
+ kfree(where);
+}
+
+static void __init gzip_mark(void **ptr)
+{
+}
+
+static void __init gzip_release(void **ptr)
+{
+}
+
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ * Returning -1 does not guarantee that gunzip() will ever return.
+ */
+static int __init fill_inbuf(void)
+{
+ if (exit_code) return -1;
+
+ insize = sys_read(crd_infd, inbuf, INBUFSIZ);
+ if (insize == 0) {
+ error("RAMDISK: ran out of compressed data");
+ return -1;
+ }
+
+ inptr = 1;
+
+ return inbuf[0];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void __init flush_window(void)
+{
+ ulg c = crc; /* temporary variable */
+ unsigned n, written;
+ uch *in, ch;
+
+ written = sys_write(crd_outfd, window, outcnt);
+ if (written != outcnt && unzip_error == 0) {
+ printk(KERN_ERR "RAMDISK: incomplete write (%d != %d) %ld\n",
+ written, outcnt, bytes_out);
+ unzip_error = 1;
+ }
+ in = window;
+ for (n = 0; n < outcnt; n++) {
+ ch = *in++;
+ c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+ }
+ crc = c;
+ bytes_out += (ulg)outcnt;
+ outcnt = 0;
+}
+
+static void __init error(char *x)
+{
+ printk(KERN_ERR "%s\n", x);
+ exit_code = 1;
+ unzip_error = 1;
+}
+
+static int __init crd_load(int in_fd, int out_fd)
+{
+ int result;
+
+ insize = 0; /* valid bytes in inbuf */
+ inptr = 0; /* index of next byte to be processed in inbuf */
+ outcnt = 0; /* bytes in output buffer */
+ exit_code = 0;
+ bytes_out = 0;
+ crc = (ulg)0xffffffffL; /* shift register contents */
+
+ crd_infd = in_fd;
+ crd_outfd = out_fd;
+ inbuf = kmalloc(INBUFSIZ, GFP_KERNEL);
+ if (inbuf == 0) {
+ printk(KERN_ERR "RAMDISK: Couldn't allocate gzip buffer\n");
+ return -1;
+ }
+ window = kmalloc(WSIZE, GFP_KERNEL);
+ if (window == 0) {
+ printk(KERN_ERR "RAMDISK: Couldn't allocate gzip window\n");
+ kfree(inbuf);
+ return -1;
+ }
+ makecrc();
+ result = gunzip();
+ if (unzip_error)
+ result = 1;
+ kfree(inbuf);
+ kfree(window);
+ return result;
+}
+
+#endif /* BUILD_CRAMDISK */
diff --git a/init/initramfs.c b/init/initramfs.c
new file mode 100644
index 0000000..02c5ce6
--- /dev/null
+++ b/init/initramfs.c
@@ -0,0 +1,500 @@
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+
+static __initdata char *message;
+static void __init error(char *x)
+{
+ if (!message)
+ message = x;
+}
+
+static void __init *malloc(size_t size)
+{
+ return kmalloc(size, GFP_KERNEL);
+}
+
+static void __init free(void *where)
+{
+ kfree(where);
+}
+
+/* link hash */
+
+static __initdata struct hash {
+ int ino, minor, major;
+ struct hash *next;
+ char *name;
+} *head[32];
+
+static inline int hash(int major, int minor, int ino)
+{
+ unsigned long tmp = ino + minor + (major << 3);
+ tmp += tmp >> 5;
+ return tmp & 31;
+}
+
+static char __init *find_link(int major, int minor, int ino, char *name)
+{
+ struct hash **p, *q;
+ for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) {
+ if ((*p)->ino != ino)
+ continue;
+ if ((*p)->minor != minor)
+ continue;
+ if ((*p)->major != major)
+ continue;
+ return (*p)->name;
+ }
+ q = (struct hash *)malloc(sizeof(struct hash));
+ if (!q)
+ panic("can't allocate link hash entry");
+ q->ino = ino;
+ q->minor = minor;
+ q->major = major;
+ q->name = name;
+ q->next = NULL;
+ *p = q;
+ return NULL;
+}
+
+static void __init free_hash(void)
+{
+ struct hash **p, *q;
+ for (p = head; p < head + 32; p++) {
+ while (*p) {
+ q = *p;
+ *p = q->next;
+ free(q);
+ }
+ }
+}
+
+/* cpio header parsing */
+
+static __initdata unsigned long ino, major, minor, nlink;
+static __initdata mode_t mode;
+static __initdata unsigned long body_len, name_len;
+static __initdata uid_t uid;
+static __initdata gid_t gid;
+static __initdata unsigned rdev;
+
+static void __init parse_header(char *s)
+{
+ unsigned long parsed[12];
+ char buf[9];
+ int i;
+
+ buf[8] = '\0';
+ for (i = 0, s += 6; i < 12; i++, s += 8) {
+ memcpy(buf, s, 8);
+ parsed[i] = simple_strtoul(buf, NULL, 16);
+ }
+ ino = parsed[0];
+ mode = parsed[1];
+ uid = parsed[2];
+ gid = parsed[3];
+ nlink = parsed[4];
+ body_len = parsed[6];
+ major = parsed[7];
+ minor = parsed[8];
+ rdev = new_encode_dev(MKDEV(parsed[9], parsed[10]));
+ name_len = parsed[11];
+}
+
+/* FSM */
+
+static __initdata enum state {
+ Start,
+ Collect,
+ GotHeader,
+ SkipIt,
+ GotName,
+ CopyFile,
+ GotSymlink,
+ Reset
+} state, next_state;
+
+static __initdata char *victim;
+static __initdata unsigned count;
+static __initdata loff_t this_header, next_header;
+
+static __initdata int dry_run;
+
+static inline void eat(unsigned n)
+{
+ victim += n;
+ this_header += n;
+ count -= n;
+}
+
+#define N_ALIGN(len) ((((len) + 1) & ~3) + 2)
+
+static __initdata char *collected;
+static __initdata int remains;
+static __initdata char *collect;
+
+static void __init read_into(char *buf, unsigned size, enum state next)
+{
+ if (count >= size) {
+ collected = victim;
+ eat(size);
+ state = next;
+ } else {
+ collect = collected = buf;
+ remains = size;
+ next_state = next;
+ state = Collect;
+ }
+}
+
+static __initdata char *header_buf, *symlink_buf, *name_buf;
+
+static int __init do_start(void)
+{
+ read_into(header_buf, 110, GotHeader);
+ return 0;
+}
+
+static int __init do_collect(void)
+{
+ unsigned n = remains;
+ if (count < n)
+ n = count;
+ memcpy(collect, victim, n);
+ eat(n);
+ collect += n;
+ if ((remains -= n) != 0)
+ return 1;
+ state = next_state;
+ return 0;
+}
+
+static int __init do_header(void)
+{
+ if (memcmp(collected, "070701", 6)) {
+ error("no cpio magic");
+ return 1;
+ }
+ parse_header(collected);
+ next_header = this_header + N_ALIGN(name_len) + body_len;
+ next_header = (next_header + 3) & ~3;
+ if (dry_run) {
+ read_into(name_buf, N_ALIGN(name_len), GotName);
+ return 0;
+ }
+ state = SkipIt;
+ if (name_len <= 0 || name_len > PATH_MAX)
+ return 0;
+ if (S_ISLNK(mode)) {
+ if (body_len > PATH_MAX)
+ return 0;
+ collect = collected = symlink_buf;
+ remains = N_ALIGN(name_len) + body_len;
+ next_state = GotSymlink;
+ state = Collect;
+ return 0;
+ }
+ if (S_ISREG(mode) || !body_len)
+ read_into(name_buf, N_ALIGN(name_len), GotName);
+ return 0;
+}
+
+static int __init do_skip(void)
+{
+ if (this_header + count < next_header) {
+ eat(count);
+ return 1;
+ } else {
+ eat(next_header - this_header);
+ state = next_state;
+ return 0;
+ }
+}
+
+static int __init do_reset(void)
+{
+ while(count && *victim == '\0')
+ eat(1);
+ if (count && (this_header & 3))
+ error("broken padding");
+ return 1;
+}
+
+static int __init maybe_link(void)
+{
+ if (nlink >= 2) {
+ char *old = find_link(major, minor, ino, collected);
+ if (old)
+ return (sys_link(old, collected) < 0) ? -1 : 1;
+ }
+ return 0;
+}
+
+static __initdata int wfd;
+
+static int __init do_name(void)
+{
+ state = SkipIt;
+ next_state = Reset;
+ if (strcmp(collected, "TRAILER!!!") == 0) {
+ free_hash();
+ return 0;
+ }
+ if (dry_run)
+ return 0;
+ if (S_ISREG(mode)) {
+ if (maybe_link() >= 0) {
+ wfd = sys_open(collected, O_WRONLY|O_CREAT, mode);
+ if (wfd >= 0) {
+ sys_fchown(wfd, uid, gid);
+ sys_fchmod(wfd, mode);
+ state = CopyFile;
+ }
+ }
+ } else if (S_ISDIR(mode)) {
+ sys_mkdir(collected, mode);
+ sys_chown(collected, uid, gid);
+ sys_chmod(collected, mode);
+ } else if (S_ISBLK(mode) || S_ISCHR(mode) ||
+ S_ISFIFO(mode) || S_ISSOCK(mode)) {
+ if (maybe_link() == 0) {
+ sys_mknod(collected, mode, rdev);
+ sys_chown(collected, uid, gid);
+ sys_chmod(collected, mode);
+ }
+ }
+ return 0;
+}
+
+static int __init do_copy(void)
+{
+ if (count >= body_len) {
+ sys_write(wfd, victim, body_len);
+ sys_close(wfd);
+ eat(body_len);
+ state = SkipIt;
+ return 0;
+ } else {
+ sys_write(wfd, victim, count);
+ body_len -= count;
+ eat(count);
+ return 1;
+ }
+}
+
+static int __init do_symlink(void)
+{
+ collected[N_ALIGN(name_len) + body_len] = '\0';
+ sys_symlink(collected + N_ALIGN(name_len), collected);
+ sys_lchown(collected, uid, gid);
+ state = SkipIt;
+ next_state = Reset;
+ return 0;
+}
+
+static __initdata int (*actions[])(void) = {
+ [Start] = do_start,
+ [Collect] = do_collect,
+ [GotHeader] = do_header,
+ [SkipIt] = do_skip,
+ [GotName] = do_name,
+ [CopyFile] = do_copy,
+ [GotSymlink] = do_symlink,
+ [Reset] = do_reset,
+};
+
+static int __init write_buffer(char *buf, unsigned len)
+{
+ count = len;
+ victim = buf;
+
+ while (!actions[state]())
+ ;
+ return len - count;
+}
+
+static void __init flush_buffer(char *buf, unsigned len)
+{
+ int written;
+ if (message)
+ return;
+ while ((written = write_buffer(buf, len)) < len && !message) {
+ char c = buf[written];
+ if (c == '0') {
+ buf += written;
+ len -= written;
+ state = Start;
+ } else if (c == 0) {
+ buf += written;
+ len -= written;
+ state = Reset;
+ } else
+ error("junk in compressed archive");
+ }
+}
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args) args
+
+#ifndef memzero
+#define memzero(s, n) memset ((s), 0, (n))
+#endif
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+#define WSIZE 0x8000 /* window size--must be a power of two, and */
+ /* at least 32K for zip's deflate method */
+
+static uch *inbuf;
+static uch *window;
+
+static unsigned insize; /* valid bytes in inbuf */
+static unsigned inptr; /* index of next byte to be processed in inbuf */
+static unsigned outcnt; /* bytes in output buffer */
+static long bytes_out;
+
+#define get_byte() (inptr < insize ? inbuf[inptr++] : -1)
+
+/* Diagnostic functions (stubbed out) */
+#define Assert(cond,msg)
+#define Trace(x)
+#define Tracev(x)
+#define Tracevv(x)
+#define Tracec(c,x)
+#define Tracecv(c,x)
+
+#define STATIC static
+#define INIT __init
+
+static void __init flush_window(void);
+static void __init error(char *m);
+static void __init gzip_mark(void **);
+static void __init gzip_release(void **);
+
+#include "../lib/inflate.c"
+
+static void __init gzip_mark(void **ptr)
+{
+}
+
+static void __init gzip_release(void **ptr)
+{
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void __init flush_window(void)
+{
+ ulg c = crc; /* temporary variable */
+ unsigned n;
+ uch *in, ch;
+
+ flush_buffer(window, outcnt);
+ in = window;
+ for (n = 0; n < outcnt; n++) {
+ ch = *in++;
+ c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+ }
+ crc = c;
+ bytes_out += (ulg)outcnt;
+ outcnt = 0;
+}
+
+static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
+{
+ int written;
+ dry_run = check_only;
+ header_buf = malloc(110);
+ symlink_buf = malloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1);
+ name_buf = malloc(N_ALIGN(PATH_MAX));
+ window = malloc(WSIZE);
+ if (!window || !header_buf || !symlink_buf || !name_buf)
+ panic("can't allocate buffers");
+ state = Start;
+ this_header = 0;
+ message = NULL;
+ while (!message && len) {
+ loff_t saved_offset = this_header;
+ if (*buf == '0' && !(this_header & 3)) {
+ state = Start;
+ written = write_buffer(buf, len);
+ buf += written;
+ len -= written;
+ continue;
+ }
+ if (!*buf) {
+ buf++;
+ len--;
+ this_header++;
+ continue;
+ }
+ this_header = 0;
+ insize = len;
+ inbuf = buf;
+ inptr = 0;
+ outcnt = 0; /* bytes in output buffer */
+ bytes_out = 0;
+ crc = (ulg)0xffffffffL; /* shift register contents */
+ makecrc();
+ gunzip();
+ if (state != Reset)
+ error("junk in gzipped archive");
+ this_header = saved_offset + inptr;
+ buf += inptr;
+ len -= inptr;
+ }
+ free(window);
+ free(name_buf);
+ free(symlink_buf);
+ free(header_buf);
+ return message;
+}
+
+extern char __initramfs_start[], __initramfs_end[];
+#ifdef CONFIG_BLK_DEV_INITRD
+#include <linux/initrd.h>
+#endif
+
+void __init populate_rootfs(void)
+{
+ char *err = unpack_to_rootfs(__initramfs_start,
+ __initramfs_end - __initramfs_start, 0);
+ if (err)
+ panic(err);
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start) {
+ int fd;
+ printk(KERN_INFO "checking if image is initramfs...");
+ err = unpack_to_rootfs((char *)initrd_start,
+ initrd_end - initrd_start, 1);
+ if (!err) {
+ printk(" it is\n");
+ unpack_to_rootfs((char *)initrd_start,
+ initrd_end - initrd_start, 0);
+ free_initrd_mem(initrd_start, initrd_end);
+ return;
+ }
+ printk("it isn't (%s); looks like an initrd\n", err);
+ fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 700);
+ if (fd >= 0) {
+ sys_write(fd, (char *)initrd_start,
+ initrd_end - initrd_start);
+ sys_close(fd);
+ free_initrd_mem(initrd_start, initrd_end);
+ }
+ }
+#endif
+}
diff --git a/init/main.c b/init/main.c
new file mode 100644
index 0000000..40bf367
--- /dev/null
+++ b/init/main.c
@@ -0,0 +1,713 @@
+/*
+ * linux/init/main.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * GK 2/5/95 - Changed to support mounting root fs via NFS
+ * Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96
+ * Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
+ * Simplified starting of init: Michael A. Griffith <grif@acm.org>
+ */
+
+#define __KERNEL_SYSCALLS__
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/kernel.h>
+#include <linux/syscalls.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/utsname.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/initrd.h>
+#include <linux/hdreg.h>
+#include <linux/bootmem.h>
+#include <linux/tty.h>
+#include <linux/gfp.h>
+#include <linux/percpu.h>
+#include <linux/kmod.h>
+#include <linux/kernel_stat.h>
+#include <linux/security.h>
+#include <linux/workqueue.h>
+#include <linux/profile.h>
+#include <linux/rcupdate.h>
+#include <linux/moduleparam.h>
+#include <linux/kallsyms.h>
+#include <linux/writeback.h>
+#include <linux/cpu.h>
+#include <linux/cpuset.h>
+#include <linux/efi.h>
+#include <linux/unistd.h>
+#include <linux/rmap.h>
+#include <linux/mempolicy.h>
+#include <linux/key.h>
+
+#include <asm/io.h>
+#include <asm/bugs.h>
+#include <asm/setup.h>
+
+/*
+ * This is one of the first .c files built. Error out early
+ * if we have compiler trouble..
+ */
+#if __GNUC__ == 2 && __GNUC_MINOR__ == 96
+#ifdef CONFIG_FRAME_POINTER
+#error This compiler cannot compile correctly with frame pointers enabled
+#endif
+#endif
+
+#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/smp.h>
+#endif
+
+/*
+ * Versions of gcc older than that listed below may actually compile
+ * and link okay, but the end product can have subtle run time bugs.
+ * To avoid associated bogus bug reports, we flatly refuse to compile
+ * with a gcc that is known to be too old from the very beginning.
+ */
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 95)
+#error Sorry, your GCC is too old. It builds incorrect kernels.
+#endif
+
+static int init(void *);
+
+extern void init_IRQ(void);
+extern void sock_init(void);
+extern void fork_init(unsigned long);
+extern void mca_init(void);
+extern void sbus_init(void);
+extern void sysctl_init(void);
+extern void signals_init(void);
+extern void buffer_init(void);
+extern void pidhash_init(void);
+extern void pidmap_init(void);
+extern void prio_tree_init(void);
+extern void radix_tree_init(void);
+extern void free_initmem(void);
+extern void populate_rootfs(void);
+extern void driver_init(void);
+extern void prepare_namespace(void);
+#ifdef CONFIG_ACPI
+extern void acpi_early_init(void);
+#else
+static inline void acpi_early_init(void) { }
+#endif
+
+#ifdef CONFIG_TC
+extern void tc_init(void);
+#endif
+
+enum system_states system_state;
+EXPORT_SYMBOL(system_state);
+
+/*
+ * Boot command-line arguments
+ */
+#define MAX_INIT_ARGS CONFIG_INIT_ENV_ARG_LIMIT
+#define MAX_INIT_ENVS CONFIG_INIT_ENV_ARG_LIMIT
+
+extern void time_init(void);
+/* Default late time init is NULL. archs can override this later. */
+void (*late_time_init)(void);
+extern void softirq_init(void);
+
+/* Untouched command line (eg. for /proc) saved by arch-specific code. */
+char saved_command_line[COMMAND_LINE_SIZE];
+
+static char *execute_command;
+
+/* Setup configured maximum number of CPUs to activate */
+static unsigned int max_cpus = NR_CPUS;
+
+/*
+ * Setup routine for controlling SMP activation
+ *
+ * Command-line option of "nosmp" or "maxcpus=0" will disable SMP
+ * activation entirely (the MPS table probe still happens, though).
+ *
+ * Command-line option of "maxcpus=<NUM>", where <NUM> is an integer
+ * greater than 0, limits the maximum number of CPUs activated in
+ * SMP mode to <NUM>.
+ */
+static int __init nosmp(char *str)
+{
+ max_cpus = 0;
+ return 1;
+}
+
+__setup("nosmp", nosmp);
+
+static int __init maxcpus(char *str)
+{
+ get_option(&str, &max_cpus);
+ return 1;
+}
+
+__setup("maxcpus=", maxcpus);
+
+static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
+char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
+static const char *panic_later, *panic_param;
+
+extern struct obs_kernel_param __setup_start[], __setup_end[];
+
+static int __init obsolete_checksetup(char *line)
+{
+ struct obs_kernel_param *p;
+
+ p = __setup_start;
+ do {
+ int n = strlen(p->str);
+ if (!strncmp(line, p->str, n)) {
+ if (p->early) {
+ /* Already done in parse_early_param? (Needs
+ * exact match on param part) */
+ if (line[n] == '\0' || line[n] == '=')
+ return 1;
+ } else if (!p->setup_func) {
+ printk(KERN_WARNING "Parameter %s is obsolete,"
+ " ignored\n", p->str);
+ return 1;
+ } else if (p->setup_func(line + n))
+ return 1;
+ }
+ p++;
+ } while (p < __setup_end);
+ return 0;
+}
+
+/*
+ * This should be approx 2 Bo*oMips to start (note initial shift), and will
+ * still work even if initially too large, it will just take slightly longer
+ */
+unsigned long loops_per_jiffy = (1<<12);
+
+EXPORT_SYMBOL(loops_per_jiffy);
+
+static int __init debug_kernel(char *str)
+{
+ if (*str)
+ return 0;
+ console_loglevel = 10;
+ return 1;
+}
+
+static int __init quiet_kernel(char *str)
+{
+ if (*str)
+ return 0;
+ console_loglevel = 4;
+ return 1;
+}
+
+__setup("debug", debug_kernel);
+__setup("quiet", quiet_kernel);
+
+static int __init loglevel(char *str)
+{
+ get_option(&str, &console_loglevel);
+ return 1;
+}
+
+__setup("loglevel=", loglevel);
+
+/*
+ * Unknown boot options get handed to init, unless they look like
+ * failed parameters
+ */
+static int __init unknown_bootoption(char *param, char *val)
+{
+ /* Change NUL term back to "=", to make "param" the whole string. */
+ if (val) {
+ /* param=val or param="val"? */
+ if (val == param+strlen(param)+1)
+ val[-1] = '=';
+ else if (val == param+strlen(param)+2) {
+ val[-2] = '=';
+ memmove(val-1, val, strlen(val)+1);
+ val--;
+ } else
+ BUG();
+ }
+
+ /* Handle obsolete-style parameters */
+ if (obsolete_checksetup(param))
+ return 0;
+
+ /*
+ * Preemptive maintenance for "why didn't my mispelled command
+ * line work?"
+ */
+ if (strchr(param, '.') && (!val || strchr(param, '.') < val)) {
+ printk(KERN_ERR "Unknown boot option `%s': ignoring\n", param);
+ return 0;
+ }
+
+ if (panic_later)
+ return 0;
+
+ if (val) {
+ /* Environment option */
+ unsigned int i;
+ for (i = 0; envp_init[i]; i++) {
+ if (i == MAX_INIT_ENVS) {
+ panic_later = "Too many boot env vars at `%s'";
+ panic_param = param;
+ }
+ if (!strncmp(param, envp_init[i], val - param))
+ break;
+ }
+ envp_init[i] = param;
+ } else {
+ /* Command line option */
+ unsigned int i;
+ for (i = 0; argv_init[i]; i++) {
+ if (i == MAX_INIT_ARGS) {
+ panic_later = "Too many boot init vars at `%s'";
+ panic_param = param;
+ }
+ }
+ argv_init[i] = param;
+ }
+ return 0;
+}
+
+static int __init init_setup(char *str)
+{
+ unsigned int i;
+
+ execute_command = str;
+ /*
+ * In case LILO is going to boot us with default command line,
+ * it prepends "auto" before the whole cmdline which makes
+ * the shell think it should execute a script with such name.
+ * So we ignore all arguments entered _before_ init=... [MJ]
+ */
+ for (i = 1; i < MAX_INIT_ARGS; i++)
+ argv_init[i] = NULL;
+ return 1;
+}
+__setup("init=", init_setup);
+
+extern void setup_arch(char **);
+
+#ifndef CONFIG_SMP
+
+#ifdef CONFIG_X86_LOCAL_APIC
+static void __init smp_init(void)
+{
+ APIC_init_uniprocessor();
+}
+#else
+#define smp_init() do { } while (0)
+#endif
+
+static inline void setup_per_cpu_areas(void) { }
+static inline void smp_prepare_cpus(unsigned int maxcpus) { }
+
+#else
+
+#ifdef __GENERIC_PER_CPU
+unsigned long __per_cpu_offset[NR_CPUS];
+
+EXPORT_SYMBOL(__per_cpu_offset);
+
+static void __init setup_per_cpu_areas(void)
+{
+ unsigned long size, i;
+ char *ptr;
+ /* Created by linker magic */
+ extern char __per_cpu_start[], __per_cpu_end[];
+
+ /* Copy section for each CPU (we discard the original) */
+ size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
+#ifdef CONFIG_MODULES
+ if (size < PERCPU_ENOUGH_ROOM)
+ size = PERCPU_ENOUGH_ROOM;
+#endif
+
+ ptr = alloc_bootmem(size * NR_CPUS);
+
+ for (i = 0; i < NR_CPUS; i++, ptr += size) {
+ __per_cpu_offset[i] = ptr - __per_cpu_start;
+ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+ }
+}
+#endif /* !__GENERIC_PER_CPU */
+
+/* Called by boot processor to activate the rest. */
+static void __init smp_init(void)
+{
+ unsigned int i;
+
+ /* FIXME: This should be done in userspace --RR */
+ for_each_present_cpu(i) {
+ if (num_online_cpus() >= max_cpus)
+ break;
+ if (!cpu_online(i))
+ cpu_up(i);
+ }
+
+ /* Any cleanup work */
+ printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
+ smp_cpus_done(max_cpus);
+#if 0
+ /* Get other processors into their bootup holding patterns. */
+
+ smp_commence();
+#endif
+}
+
+#endif
+
+/*
+ * We need to finalize in a non-__init function or else race conditions
+ * between the root thread and the init thread may cause start_kernel to
+ * be reaped by free_initmem before the root thread has proceeded to
+ * cpu_idle.
+ *
+ * gcc-3.4 accidentally inlines this function, so use noinline.
+ */
+
+static void noinline rest_init(void)
+ __releases(kernel_lock)
+{
+ kernel_thread(init, NULL, CLONE_FS | CLONE_SIGHAND);
+ numa_default_policy();
+ unlock_kernel();
+ preempt_enable_no_resched();
+ cpu_idle();
+}
+
+/* Check for early params. */
+static int __init do_early_param(char *param, char *val)
+{
+ struct obs_kernel_param *p;
+
+ for (p = __setup_start; p < __setup_end; p++) {
+ if (p->early && strcmp(param, p->str) == 0) {
+ if (p->setup_func(val) != 0)
+ printk(KERN_WARNING
+ "Malformed early option '%s'\n", param);
+ }
+ }
+ /* We accept everything at this stage. */
+ return 0;
+}
+
+/* Arch code calls this early on, or if not, just before other parsing. */
+void __init parse_early_param(void)
+{
+ static __initdata int done = 0;
+ static __initdata char tmp_cmdline[COMMAND_LINE_SIZE];
+
+ if (done)
+ return;
+
+ /* All fall through to do_early_param. */
+ strlcpy(tmp_cmdline, saved_command_line, COMMAND_LINE_SIZE);
+ parse_args("early options", tmp_cmdline, NULL, 0, do_early_param);
+ done = 1;
+}
+
+/*
+ * Activate the first processor.
+ */
+
+asmlinkage void __init start_kernel(void)
+{
+ char * command_line;
+ extern struct kernel_param __start___param[], __stop___param[];
+/*
+ * Interrupts are still disabled. Do necessary setups, then
+ * enable them
+ */
+ lock_kernel();
+ page_address_init();
+ printk(KERN_NOTICE);
+ printk(linux_banner);
+ setup_arch(&command_line);
+ setup_per_cpu_areas();
+
+ /*
+ * Mark the boot cpu "online" so that it can call console drivers in
+ * printk() and can access its per-cpu storage.
+ */
+ smp_prepare_boot_cpu();
+
+ /*
+ * Set up the scheduler prior starting any interrupts (such as the
+ * timer interrupt). Full topology setup happens at smp_init()
+ * time - but meanwhile we still have a functioning scheduler.
+ */
+ sched_init();
+ /*
+ * Disable preemption - early bootup scheduling is extremely
+ * fragile until we cpu_idle() for the first time.
+ */
+ preempt_disable();
+ build_all_zonelists();
+ page_alloc_init();
+ printk(KERN_NOTICE "Kernel command line: %s\n", saved_command_line);
+ parse_early_param();
+ parse_args("Booting kernel", command_line, __start___param,
+ __stop___param - __start___param,
+ &unknown_bootoption);
+ sort_main_extable();
+ trap_init();
+ rcu_init();
+ init_IRQ();
+ pidhash_init();
+ init_timers();
+ softirq_init();
+ time_init();
+
+ /*
+ * HACK ALERT! This is early. We're enabling the console before
+ * we've done PCI setups etc, and console_init() must be aware of
+ * this. But we do want output early, in case something goes wrong.
+ */
+ console_init();
+ if (panic_later)
+ panic(panic_later, panic_param);
+ profile_init();
+ local_irq_enable();
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start && !initrd_below_start_ok &&
+ initrd_start < min_low_pfn << PAGE_SHIFT) {
+ printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
+ "disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
+ initrd_start = 0;
+ }
+#endif
+ vfs_caches_init_early();
+ mem_init();
+ kmem_cache_init();
+ numa_policy_init();
+ if (late_time_init)
+ late_time_init();
+ calibrate_delay();
+ pidmap_init();
+ pgtable_cache_init();
+ prio_tree_init();
+ anon_vma_init();
+#ifdef CONFIG_X86
+ if (efi_enabled)
+ efi_enter_virtual_mode();
+#endif
+ fork_init(num_physpages);
+ proc_caches_init();
+ buffer_init();
+ unnamed_dev_init();
+ key_init();
+ security_init();
+ vfs_caches_init(num_physpages);
+ radix_tree_init();
+ signals_init();
+ /* rootfs populating might need page-writeback */
+ page_writeback_init();
+#ifdef CONFIG_PROC_FS
+ proc_root_init();
+#endif
+ cpuset_init();
+
+ check_bugs();
+
+ acpi_early_init(); /* before LAPIC and SMP init */
+
+ /* Do the rest non-__init'ed, we're now alive */
+ rest_init();
+}
+
+static int __initdata initcall_debug;
+
+static int __init initcall_debug_setup(char *str)
+{
+ initcall_debug = 1;
+ return 1;
+}
+__setup("initcall_debug", initcall_debug_setup);
+
+struct task_struct *child_reaper = &init_task;
+
+extern initcall_t __initcall_start[], __initcall_end[];
+
+static void __init do_initcalls(void)
+{
+ initcall_t *call;
+ int count = preempt_count();
+
+ for (call = __initcall_start; call < __initcall_end; call++) {
+ char *msg;
+
+ if (initcall_debug) {
+ printk(KERN_DEBUG "Calling initcall 0x%p", *call);
+ print_fn_descriptor_symbol(": %s()", (unsigned long) *call);
+ printk("\n");
+ }
+
+ (*call)();
+
+ msg = NULL;
+ if (preempt_count() != count) {
+ msg = "preemption imbalance";
+ preempt_count() = count;
+ }
+ if (irqs_disabled()) {
+ msg = "disabled interrupts";
+ local_irq_enable();
+ }
+ if (msg) {
+ printk(KERN_WARNING "error in initcall at 0x%p: "
+ "returned with %s\n", *call, msg);
+ }
+ }
+
+ /* Make sure there is no pending stuff from the initcall sequence */
+ flush_scheduled_work();
+}
+
+/*
+ * Ok, the machine is now initialized. None of the devices
+ * have been touched yet, but the CPU subsystem is up and
+ * running, and memory and process management works.
+ *
+ * Now we can finally start doing some real work..
+ */
+static void __init do_basic_setup(void)
+{
+ /* drivers will send hotplug events */
+ init_workqueues();
+ usermodehelper_init();
+ driver_init();
+
+#ifdef CONFIG_SYSCTL
+ sysctl_init();
+#endif
+
+ /* Networking initialization needs a process context */
+ sock_init();
+
+ do_initcalls();
+}
+
+static void do_pre_smp_initcalls(void)
+{
+ extern int spawn_ksoftirqd(void);
+#ifdef CONFIG_SMP
+ extern int migration_init(void);
+
+ migration_init();
+#endif
+ spawn_ksoftirqd();
+}
+
+static void run_init_process(char *init_filename)
+{
+ argv_init[0] = init_filename;
+ execve(init_filename, argv_init, envp_init);
+}
+
+static inline void fixup_cpu_present_map(void)
+{
+#ifdef CONFIG_SMP
+ int i;
+
+ /*
+ * If arch is not hotplug ready and did not populate
+ * cpu_present_map, just make cpu_present_map same as cpu_possible_map
+ * for other cpu bringup code to function as normal. e.g smp_init() etc.
+ */
+ if (cpus_empty(cpu_present_map)) {
+ for_each_cpu(i) {
+ cpu_set(i, cpu_present_map);
+ }
+ }
+#endif
+}
+
+static int init(void * unused)
+{
+ lock_kernel();
+ /*
+ * init can run on any cpu.
+ */
+ set_cpus_allowed(current, CPU_MASK_ALL);
+ /*
+ * Tell the world that we're going to be the grim
+ * reaper of innocent orphaned children.
+ *
+ * We don't want people to have to make incorrect
+ * assumptions about where in the task array this
+ * can be found.
+ */
+ child_reaper = current;
+
+ /* Sets up cpus_possible() */
+ smp_prepare_cpus(max_cpus);
+
+ do_pre_smp_initcalls();
+
+ fixup_cpu_present_map();
+ smp_init();
+ sched_init_smp();
+
+ cpuset_init_smp();
+
+ /*
+ * Do this before initcalls, because some drivers want to access
+ * firmware files.
+ */
+ populate_rootfs();
+
+ do_basic_setup();
+
+ /*
+ * check if there is an early userspace init. If yes, let it do all
+ * the work
+ */
+ if (sys_access((const char __user *) "/init", 0) == 0)
+ execute_command = "/init";
+ else
+ prepare_namespace();
+
+ /*
+ * Ok, we have completed the initial bootup, and
+ * we're essentially up and running. Get rid of the
+ * initmem segments and start the user-mode stuff..
+ */
+ free_initmem();
+ unlock_kernel();
+ system_state = SYSTEM_RUNNING;
+ numa_default_policy();
+
+ if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
+ printk(KERN_WARNING "Warning: unable to open an initial console.\n");
+
+ (void) sys_dup(0);
+ (void) sys_dup(0);
+
+ /*
+ * We try each of these until one succeeds.
+ *
+ * The Bourne shell can be used instead of init if we are
+ * trying to recover a really broken machine.
+ */
+
+ if (execute_command)
+ run_init_process(execute_command);
+
+ run_init_process("/sbin/init");
+ run_init_process("/etc/init");
+ run_init_process("/bin/init");
+ run_init_process("/bin/sh");
+
+ panic("No init found. Try passing init= option to kernel.");
+}
diff --git a/init/version.c b/init/version.c
new file mode 100644
index 0000000..3ddc3ce
--- /dev/null
+++ b/init/version.c
@@ -0,0 +1,33 @@
+/*
+ * linux/init/version.c
+ *
+ * Copyright (C) 1992 Theodore Ts'o
+ *
+ * May be freely distributed as part of Linux.
+ */
+
+#include <linux/compile.h>
+#include <linux/module.h>
+#include <linux/uts.h>
+#include <linux/utsname.h>
+#include <linux/version.h>
+
+#define version(a) Version_ ## a
+#define version_string(a) version(a)
+
+int version_string(LINUX_VERSION_CODE);
+
+struct new_utsname system_utsname = {
+ .sysname = UTS_SYSNAME,
+ .nodename = UTS_NODENAME,
+ .release = UTS_RELEASE,
+ .version = UTS_VERSION,
+ .machine = UTS_MACHINE,
+ .domainname = UTS_DOMAINNAME,
+};
+
+EXPORT_SYMBOL(system_utsname);
+
+const char linux_banner[] =
+ "Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
+ LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";