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Subject[PATCH] PARAM 2/4
Date
Just fixed arch/i386/mach-voyager/setup_arch_pre.h from previous send.

Makes a nice, easy to use, hard to misuse PARAM() macro for modules
and boot parameters alike. Implements the types required for current
kernel usage.

Jeff Garzik doesn't like the name PARAM (I had to rename the
asm-i386/setup.h PARAM to "PARAMS", but it's only used in that header
and one other. I can't think of a better name. KPARAM seems
redundant. MODULE_PARAM is misleading and wrong. DRIVER_PARAM is
wrong too.

OTOH, linux/param.h was taken, so I put it in linux/params.h, which is
pretty sucky.

Rusty.
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.

Name: Parameter Core Patch
Author: Rusty Russell
Status: Tested on 2.5.38
Depends: Misc/strcspn.patch.gz
Depends: Module/module-i386.patch.gz

D: This patch is a rewrite of the insmod and boot parameter handling,
D: to unify them.
D:
D: The new format is fairly simple: built on top of __PARAM_CALL there
D: are several helpers, eg "PARAM(foo, int, 000)". The final argument
D: is the permissions bits, for exposing parameters in driverfs (if
D: non-zero) at a later stage.

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/i386/mach-voyager/setup_arch_pre.h .31348-linux-2.5-bk.updated/arch/i386/mach-voyager/setup_arch_pre.h
--- .31348-linux-2.5-bk/arch/i386/mach-voyager/setup_arch_pre.h 2002-10-31 12:36:19.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/i386/mach-voyager/setup_arch_pre.h 2002-11-16 09:22:34.000000000 +1100
@@ -1,5 +1,5 @@
#include <asm/voyager.h>
-#define VOYAGER_BIOS_INFO ((struct voyager_bios_info *)(PARAM+0x40))
+#define VOYAGER_BIOS_INFO ((struct voyager_bios_info *)(PARAMS+0x40))

/* Hook to call BIOS initialisation function */

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/i386/vmlinux.lds.S .31348-linux-2.5-bk.updated/arch/i386/vmlinux.lds.S
--- .31348-linux-2.5-bk/arch/i386/vmlinux.lds.S 2002-11-16 08:36:04.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/i386/vmlinux.lds.S 2002-11-16 09:22:03.000000000 +1100
@@ -67,6 +67,9 @@ SECTIONS
__setup_start = .;
.init.setup : { *(.init.setup) }
__setup_end = .;
+ __param_start = .;
+ .param.init : { *(.param.init) }
+ __param_end = .;
__initcall_start = .;
.initcall.init : {
*(.initcall1.init)
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/ia64/vmlinux.lds.S .31348-linux-2.5-bk.updated/arch/ia64/vmlinux.lds.S
--- .31348-linux-2.5-bk/arch/ia64/vmlinux.lds.S 2002-11-05 10:54:24.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/ia64/vmlinux.lds.S 2002-11-16 09:22:03.000000000 +1100
@@ -102,6 +102,10 @@ SECTIONS
.init.setup : AT(ADDR(.init.setup) - PAGE_OFFSET)
{ *(.init.setup) }
__setup_end = .;
+ __param_start = .;
+ .param.init : AT(ADDR(.param.init) - PAGE_OFFSET)
+ { *(.param.init) }
+ __param_end = .;
__initcall_start = .;
.initcall.init : AT(ADDR(.initcall.init) - PAGE_OFFSET)
{
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/ppc/vmlinux.lds.S .31348-linux-2.5-bk.updated/arch/ppc/vmlinux.lds.S
--- .31348-linux-2.5-bk/arch/ppc/vmlinux.lds.S 2002-11-11 20:00:54.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/ppc/vmlinux.lds.S 2002-11-16 09:22:03.000000000 +1100
@@ -103,6 +103,9 @@ SECTIONS
__setup_start = .;
.init.setup : { *(.init.setup) }
__setup_end = .;
+ __param_start = .;
+ .param.init : { *(.param.init) }
+ __param_end = .;
__initcall_start = .;
.initcall.init : {
*(.initcall1.init)
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/ppc64/vmlinux.lds.S .31348-linux-2.5-bk.updated/arch/ppc64/vmlinux.lds.S
--- .31348-linux-2.5-bk/arch/ppc64/vmlinux.lds.S 2002-11-11 20:00:55.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/ppc64/vmlinux.lds.S 2002-11-16 09:22:03.000000000 +1100
@@ -91,6 +91,9 @@ SECTIONS
__setup_start = .;
.init.setup : { *(.init.setup) }
__setup_end = .;
+ __param_start = .;
+ .param.init : { *(.param.init) }
+ __param_end = .;
__initcall_start = .;
.initcall.init : {
*(.initcall1.init)
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/arch/sparc64/vmlinux.lds.S .31348-linux-2.5-bk.updated/arch/sparc64/vmlinux.lds.S
--- .31348-linux-2.5-bk/arch/sparc64/vmlinux.lds.S 2002-11-16 08:36:05.000000000 +1100
+++ .31348-linux-2.5-bk.updated/arch/sparc64/vmlinux.lds.S 2002-11-16 09:22:03.000000000 +1100
@@ -49,6 +49,9 @@ SECTIONS
__setup_start = .;
.init.setup : { *(.init.setup) }
__setup_end = .;
+ __param_start = .;
+ .param.init : { *(.param.init) }
+ __param_end = .;
__initcall_start = .;
.initcall.init : {
*(.initcall1.init)
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/include/asm-i386/setup.h .31348-linux-2.5-bk.updated/include/asm-i386/setup.h
--- .31348-linux-2.5-bk/include/asm-i386/setup.h 2002-10-19 17:48:09.000000000 +1000
+++ .31348-linux-2.5-bk.updated/include/asm-i386/setup.h 2002-11-16 09:22:03.000000000 +1100
@@ -19,27 +19,27 @@
/*
* This is set up by the setup-routine at boot-time
*/
-#define PARAM ((unsigned char *)empty_zero_page)
-#define SCREEN_INFO (*(struct screen_info *) (PARAM+0))
-#define EXT_MEM_K (*(unsigned short *) (PARAM+2))
-#define ALT_MEM_K (*(unsigned long *) (PARAM+0x1e0))
-#define E820_MAP_NR (*(char*) (PARAM+E820NR))
-#define E820_MAP ((struct e820entry *) (PARAM+E820MAP))
-#define APM_BIOS_INFO (*(struct apm_bios_info *) (PARAM+0x40))
-#define DRIVE_INFO (*(struct drive_info_struct *) (PARAM+0x80))
-#define SYS_DESC_TABLE (*(struct sys_desc_table_struct*)(PARAM+0xa0))
-#define MOUNT_ROOT_RDONLY (*(unsigned short *) (PARAM+0x1F2))
-#define RAMDISK_FLAGS (*(unsigned short *) (PARAM+0x1F8))
-#define VIDEO_MODE (*(unsigned short *) (PARAM+0x1FA))
-#define ORIG_ROOT_DEV (*(unsigned short *) (PARAM+0x1FC))
-#define AUX_DEVICE_INFO (*(unsigned char *) (PARAM+0x1FF))
-#define LOADER_TYPE (*(unsigned char *) (PARAM+0x210))
-#define KERNEL_START (*(unsigned long *) (PARAM+0x214))
-#define INITRD_START (*(unsigned long *) (PARAM+0x218))
-#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
-#define EDD_NR (*(unsigned char *) (PARAM+EDDNR))
-#define EDD_BUF ((struct edd_info *) (PARAM+EDDBUF))
-#define COMMAND_LINE ((char *) (PARAM+2048))
+#define PARAMS ((unsigned char *)empty_zero_page)
+#define SCREEN_INFO (*(struct screen_info *) (PARAMS+0))
+#define EXT_MEM_K (*(unsigned short *) (PARAMS+2))
+#define ALT_MEM_K (*(unsigned long *) (PARAMS+0x1e0))
+#define E820_MAP_NR (*(char*) (PARAMS+E820NR))
+#define E820_MAP ((struct e820entry *) (PARAMS+E820MAP))
+#define APM_BIOS_INFO (*(struct apm_bios_info *) (PARAMS+0x40))
+#define DRIVE_INFO (*(struct drive_info_struct *) (PARAMS+0x80))
+#define SYS_DESC_TABLE (*(struct sys_desc_table_struct*)(PARAMS+0xa0))
+#define MOUNT_ROOT_RDONLY (*(unsigned short *) (PARAMS+0x1F2))
+#define RAMDISK_FLAGS (*(unsigned short *) (PARAMS+0x1F8))
+#define VIDEO_MODE (*(unsigned short *) (PARAMS+0x1FA))
+#define ORIG_ROOT_DEV (*(unsigned short *) (PARAMS+0x1FC))
+#define AUX_DEVICE_INFO (*(unsigned char *) (PARAMS+0x1FF))
+#define LOADER_TYPE (*(unsigned char *) (PARAMS+0x210))
+#define KERNEL_START (*(unsigned long *) (PARAMS+0x214))
+#define INITRD_START (*(unsigned long *) (PARAMS+0x218))
+#define INITRD_SIZE (*(unsigned long *) (PARAMS+0x21c))
+#define EDD_NR (*(unsigned char *) (PARAMS+EDDNR))
+#define EDD_BUF ((struct edd_info *) (PARAMS+EDDBUF))
+#define COMMAND_LINE ((char *) (PARAMS+2048))
#define COMMAND_LINE_SIZE 256

#endif /* _i386_SETUP_H */
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/include/linux/init.h .31348-linux-2.5-bk.updated/include/linux/init.h
--- .31348-linux-2.5-bk/include/linux/init.h 2002-11-16 08:36:14.000000000 +1100
+++ .31348-linux-2.5-bk.updated/include/linux/init.h 2002-11-16 09:22:03.000000000 +1100
@@ -86,19 +86,15 @@ typedef void (*exitcall_t)(void);
#define __exitcall(fn) \
static exitcall_t __exitcall_##fn __exit_call = fn

-/*
- * Used for kernel command line parameter setup
- */
-struct kernel_param {
+struct obs_kernel_param {
const char *str;
int (*setup_func)(char *);
};

-extern struct kernel_param __setup_start, __setup_end;
-
+/* OBSOLETE: see params.h for the right way. */
#define __setup(str, fn) \
static char __setup_str_##fn[] __initdata = str; \
- static struct kernel_param __setup_##fn \
+ static struct obs_kernel_param __setup_##fn \
__attribute__((unused,__section__ (".init.setup"))) \
= { __setup_str_##fn, fn }

@@ -177,6 +173,16 @@ extern struct kernel_param __setup_start
/* Data marked not to be saved by software_suspend() */
#define __nosavedata __attribute__ ((__section__ (".data.nosave")))

+/* This means "can be init if no module support, otherwise module load
+ may call it." */
+#ifdef CONFIG_MODULES
+#define __init_or_module
+#define __initdata_or_module
+#else
+#define __init_or_module __init
+#define __initdata_or_module __initdata
+#endif /*CONFIG_MODULES*/
+
#ifdef CONFIG_HOTPLUG
#define __devinit
#define __devinitdata
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/include/linux/kernel.h .31348-linux-2.5-bk.updated/include/linux/kernel.h
--- .31348-linux-2.5-bk/include/linux/kernel.h 2002-11-16 08:36:14.000000000 +1100
+++ .31348-linux-2.5-bk.updated/include/linux/kernel.h 2002-11-16 09:22:03.000000000 +1100
@@ -71,7 +71,7 @@ extern int sscanf(const char *, const ch
extern int vsscanf(const char *, const char *, va_list);

extern int get_option(char **str, int *pint);
-extern char *get_options(char *str, int nints, int *ints);
+extern char *get_options(const char *str, int nints, int *ints);
extern unsigned long long memparse(char *ptr, char **retptr);
extern void dev_probe_lock(void);
extern void dev_probe_unlock(void);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/include/linux/params.h .31348-linux-2.5-bk.updated/include/linux/params.h
--- .31348-linux-2.5-bk/include/linux/params.h 1970-01-01 10:00:00.000000000 +1000
+++ .31348-linux-2.5-bk.updated/include/linux/params.h 2002-11-16 09:22:03.000000000 +1100
@@ -0,0 +1,123 @@
+#ifndef _LINUX_PARAMS_H
+#define _LINUX_PARAMS_H
+/* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */
+#include <linux/init.h>
+#include <linux/stringify.h>
+
+/* You can override this manually, but generally this should match the
+ module name. */
+#define PARAM_PREFIX __stringify(KBUILD_MODNAME) "."
+
+struct kernel_param;
+
+/* Returns 0, or -errno. arg is in kp->arg. */
+typedef int (*param_set_fn)(const char *val, struct kernel_param *kp);
+/* Returns length written or -errno. Buffer is 4k (ie. be short!) */
+typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp);
+
+struct kernel_param {
+ const char *name;
+ unsigned int perm;
+ param_set_fn set;
+ param_get_fn get;
+ void *arg;
+};
+
+/* Special one for strings we want to copy into */
+struct kparam_string {
+ unsigned int maxlen;
+ char *string;
+};
+
+/* This is the fundamental function for registering boot/module
+ parameters. perm sets the visibility in driverfs: 000 means it's
+ not there, read bits mean it's readable, write bits mean it's
+ writable. */
+#define __PARAM_CALL(prefix, name, set, get, arg, perm) \
+ static char __param_str_##name[] __initdata = prefix #name; \
+ static struct kernel_param __param_##name \
+ __attribute__ ((unused,__section__ (".param.init"))) \
+ = { __param_str_##name, perm, set, get, arg }
+
+#define PARAM_CALL(name, set, get, arg, perm) \
+ __PARAM_CALL(PARAM_PREFIX, name, set, get, arg, perm)
+
+/* Helper functions: type is byte, short, ushort, int, uint, long,
+ ulong, charp, bool or invbool, or XXX if you define param_get_XXX,
+ param_set_XXX and param_check_XXX. */
+#define PARAM_NAMED(name, value, type, perm) \
+ param_check_##type(name, &(value)); \
+ PARAM_CALL(name, param_set_##type, param_get_##type, &value, perm)
+
+#define PARAM(name, type, perm) \
+ PARAM_NAMED(name, name, type, perm)
+
+/* Actually copy string: maxlen param is usually sizeof(string). */
+#define PARAM_STRING(name, string, len, perm) \
+ static struct kparam_string __param_string_##name __initdata \
+ = { len, string }; \
+ PARAM_CALL(name, param_set_copystring, param_get_charp, \
+ &__param_string_##name, perm)
+
+/* Called on module insert or kernel boot */
+extern int parse_args(const char *name,
+ char *args,
+ struct kernel_param *params,
+ unsigned num,
+ int (*unknown)(char *param, char *val));
+
+/* All the helper functions */
+/* The macros to do compile-time type checking stolen from Jakub
+ Jelinek, who IIRC came up with this idea for the 2.4 module init code. */
+#define __param_check(name, p, type) \
+ static inline type *__check_##name(void) { return(p); }
+
+extern int param_set_short(const char *val, struct kernel_param *kp);
+extern int param_get_short(char *buffer, struct kernel_param *kp);
+#define param_check_short(name, p) __param_check(name, p, short)
+
+extern int param_set_ushort(const char *val, struct kernel_param *kp);
+extern int param_get_ushort(char *buffer, struct kernel_param *kp);
+#define param_check_ushort(name, p) __param_check(name, p, unsigned short)
+
+extern int param_set_int(const char *val, struct kernel_param *kp);
+extern int param_get_int(char *buffer, struct kernel_param *kp);
+#define param_check_int(name, p) __param_check(name, p, int)
+
+extern int param_set_uint(const char *val, struct kernel_param *kp);
+extern int param_get_uint(char *buffer, struct kernel_param *kp);
+#define param_check_uint(name, p) __param_check(name, p, unsigned int)
+
+extern int param_set_long(const char *val, struct kernel_param *kp);
+extern int param_get_long(char *buffer, struct kernel_param *kp);
+#define param_check_long(name, p) __param_check(name, p, long)
+
+extern int param_set_ulong(const char *val, struct kernel_param *kp);
+extern int param_get_ulong(char *buffer, struct kernel_param *kp);
+#define param_check_ulong(name, p) __param_check(name, p, unsigned long)
+
+extern int param_set_charp(const char *val, struct kernel_param *kp);
+extern int param_get_charp(char *buffer, struct kernel_param *kp);
+#define param_check_charp(name, p) __param_check(name, p, char *)
+
+extern int param_set_bool(const char *val, struct kernel_param *kp);
+extern int param_get_bool(char *buffer, struct kernel_param *kp);
+#define param_check_bool(name, p) __param_check(name, p, int)
+
+extern int param_set_invbool(const char *val, struct kernel_param *kp);
+extern int param_get_invbool(char *buffer, struct kernel_param *kp);
+#define param_check_invbool(name, p) __param_check(name, p, int)
+
+/* First two elements are the max and min array length (which don't change) */
+extern int param_set_intarray(const char *val, struct kernel_param *kp);
+extern int param_get_intarray(char *buffer, struct kernel_param *kp);
+#define param_check_intarray(name, p) __param_check(name, p, int *)
+
+extern int param_set_copystring(const char *val, struct kernel_param *kp);
+
+int param_array(const char *name,
+ const char *val,
+ unsigned int min, unsigned int max,
+ void *elem, int elemsize,
+ int (*set)(const char *, struct kernel_param *kp));
+#endif /* _LINUX_PARAM_TYPES_H */
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/init/main.c .31348-linux-2.5-bk.updated/init/main.c
--- .31348-linux-2.5-bk/init/main.c 2002-11-16 08:36:14.000000000 +1100
+++ .31348-linux-2.5-bk.updated/init/main.c 2002-11-16 09:22:03.000000000 +1100
@@ -33,6 +33,7 @@
#include <linux/workqueue.h>
#include <linux/profile.h>
#include <linux/rcupdate.h>
+#include <linux/params.h>

#include <asm/io.h>
#include <asm/bugs.h>
@@ -135,9 +136,10 @@ char * envp_init[MAX_INIT_ENVS+2] = { "H

__setup("profile=", profile_setup);

-static int __init checksetup(char *line)
+static int __init obsolete_checksetup(char *line)
{
- struct kernel_param *p;
+ struct obs_kernel_param *p;
+ extern struct obs_kernel_param __setup_start, __setup_end;

p = &__setup_start;
do {
@@ -220,74 +222,45 @@ static int __init quiet_kernel(char *str
__setup("debug", debug_kernel);
__setup("quiet", quiet_kernel);

-/*
- * This is a simple kernel command line parsing function: it parses
- * the command line, and fills in the arguments/environment to init
- * as appropriate. Any cmd-line option is taken to be an environment
- * variable if it contains the character '='.
- *
- * This routine also checks for options meant for the kernel.
- * These options are not given to init - they are for internal kernel use only.
- */
-static void __init parse_options(char *line)
+/* Unknown boot options get handed to init, unless they look like
+ failed parameters */
+static int unknown_bootoption(char *param, char *val)
{
- char *next,*quote;
- int args, envs;
+ /* Change NUL term back to "=", to make "param" the whole string. */
+ if (val)
+ val[-1] = '=';

- if (!*line)
- return;
- args = 0;
- envs = 1; /* TERM is set to 'linux' by default */
- next = line;
- while ((line = next) != NULL) {
- quote = strchr(line,'"');
- next = strchr(line, ' ');
- while (next != NULL && quote != NULL && quote < next) {
- /* we found a left quote before the next blank
- * now we have to find the matching right quote
- */
- next = strchr(quote+1, '"');
- if (next != NULL) {
- quote = strchr(next+1, '"');
- next = strchr(next+1, ' ');
- }
- }
- if (next != NULL)
- *next++ = 0;
- if (!strncmp(line,"init=",5)) {
- line += 5;
- execute_command = line;
- /* 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]
- */
- args = 0;
- continue;
+ /* 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 (val) {
+ /* Environment option */
+ unsigned int i;
+ for (i = 0; envp_init[i]; i++) {
+ if (i == MAX_INIT_ENVS)
+ panic("Too many boot env vars at `%s'", param);
}
- if (checksetup(line))
- continue;
-
- /*
- * Then check if it's an environment variable or
- * an option.
- */
- if (strchr(line,'=')) {
- if (envs >= MAX_INIT_ENVS)
- break;
- envp_init[++envs] = line;
- } else {
- if (args >= MAX_INIT_ARGS)
- break;
- if (*line)
- argv_init[++args] = line;
+ envp_init[i] = param;
+ } else {
+ /* Command line option */
+ unsigned int i;
+ for (i = 0; argv_init[i]; i++) {
+ if (i == MAX_INIT_ARGS)
+ panic("Too many boot init vars at `%s'",param);
}
+ argv_init[i] = param;
}
- argv_init[args+1] = NULL;
- envp_init[envs+1] = NULL;
+ return 0;
}

-
extern void setup_arch(char **);
extern void cpu_idle(void);

@@ -381,6 +354,7 @@ asmlinkage void __init start_kernel(void
{
char * command_line;
extern char saved_command_line[];
+ extern struct kernel_param __param_start, __param_end;
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
@@ -392,7 +366,9 @@ asmlinkage void __init start_kernel(void
build_all_zonelists();
page_alloc_init();
printk("Kernel command line: %s\n", saved_command_line);
- parse_options(command_line);
+ parse_args("Booting kernel", command_line, &__param_start,
+ &__param_end - &__param_start - 1,
+ &unknown_bootoption);
trap_init();
rcu_init();
init_IRQ();
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/kernel/Makefile .31348-linux-2.5-bk.updated/kernel/Makefile
--- .31348-linux-2.5-bk/kernel/Makefile 2002-11-16 08:36:14.000000000 +1100
+++ .31348-linux-2.5-bk.updated/kernel/Makefile 2002-11-16 09:22:03.000000000 +1100
@@ -4,13 +4,13 @@

export-objs = signal.o sys.o kmod.o workqueue.o ksyms.o pm.o exec_domain.o \
printk.o platform.o suspend.o dma.o module.o cpufreq.o \
- profile.o rcupdate.o intermodule.o
+ profile.o rcupdate.o intermodule.o params.o

obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
exit.o itimer.o time.o softirq.o resource.o \
sysctl.o capability.o ptrace.o timer.o user.o \
signal.o sys.o kmod.o workqueue.o futex.o platform.o pid.o \
- rcupdate.o intermodule.o
+ rcupdate.o intermodule.o params.o

obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
obj-$(CONFIG_SMP) += cpu.o
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/kernel/params.c .31348-linux-2.5-bk.updated/kernel/params.c
--- .31348-linux-2.5-bk/kernel/params.c 1970-01-01 10:00:00.000000000 +1000
+++ .31348-linux-2.5-bk.updated/kernel/params.c 2002-11-16 09:22:03.000000000 +1100
@@ -0,0 +1,338 @@
+/* Helpers for initial module or kernel cmdline parsing
+ Copyright (C) 2001 Rusty Russell.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+#include <linux/params.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , ...)
+#endif
+
+static int parse_one(char *param,
+ char *val,
+ struct kernel_param *params,
+ unsigned num_params,
+ int (*handle_unknown)(char *param, char *val))
+{
+ unsigned int i;
+
+ /* Find parameter */
+ for (i = 0; i < num_params; i++) {
+ if (strcmp(param, params[i].name) == 0) {
+ DEBUGP("They are equal! Calling %p\n",
+ params[i].set);
+ return params[i].set(val, &params[i]);
+ }
+ }
+
+ if (handle_unknown) {
+ DEBUGP("Unknown argument: calling %p\n", handle_unknown);
+ return handle_unknown(param, val);
+ }
+
+ DEBUGP("Unknown argument `%s'\n", param);
+ return -ENOENT;
+}
+
+/* You can use " around spaces, but can't escape ". */
+/* Hyphens and underscores equivalent in parameter names. */
+static char *next_arg(char *args, char **param, char **val)
+{
+ unsigned int i, equals = 0;
+ int in_quote = 0;
+
+ /* Chew any extra spaces */
+ while (*args == ' ') args++;
+
+ for (i = 0; args[i]; i++) {
+ if (args[i] == ' ' && !in_quote)
+ break;
+ if (equals == 0) {
+ if (args[i] == '=')
+ equals = i;
+ else if (args[i] == '-')
+ args[i] = '_';
+ }
+ if (args[i] == '"')
+ in_quote = !in_quote;
+ }
+
+ *param = args;
+ if (!equals)
+ *val = NULL;
+ else {
+ args[equals] = '\0';
+ *val = args + equals + 1;
+ }
+
+ if (args[i]) {
+ args[i] = '\0';
+ return args + i + 1;
+ } else
+ return args + i;
+}
+
+/* Args looks like "foo=bar,bar2 baz=fuz wiz". */
+int parse_args(const char *name,
+ char *args,
+ struct kernel_param *params,
+ unsigned num,
+ int (*unknown)(char *param, char *val))
+{
+ char *param, *val;
+
+ DEBUGP("Parsing ARGS: %s\n", args);
+
+ while (*args) {
+ int ret;
+
+ args = next_arg(args, &param, &val);
+ ret = parse_one(param, val, params, num, unknown);
+ switch (ret) {
+ case -ENOENT:
+ printk(KERN_ERR "%s: Unknown parameter `%s'\n",
+ name, param);
+ return ret;
+ case -ENOSPC:
+ printk(KERN_ERR
+ "%s: `%s' too large for parameter `%s'\n",
+ name, val ?: "", param);
+ return ret;
+ case 0:
+ break;
+ default:
+ printk(KERN_ERR
+ "%s: `%s' invalid for parameter `%s'\n",
+ name, val ?: "", param);
+ return ret;
+ }
+ }
+
+ /* All parsed OK. */
+ return 0;
+}
+
+/* Lazy bastard, eh? */
+#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \
+ int param_set_##name(const char *val, struct kernel_param *kp) \
+ { \
+ char *endp; \
+ tmptype l; \
+ \
+ if (!val) return -EINVAL; \
+ l = strtolfn(val, &endp, 0); \
+ if (endp == val || *endp || ((type)l != l)) \
+ return -EINVAL; \
+ *((type *)kp->arg) = l; \
+ return 0; \
+ } \
+ int param_get_##name(char *buffer, struct kernel_param *kp) \
+ { \
+ return sprintf(buffer, format, *((type *)kp->arg)); \
+ }
+
+STANDARD_PARAM_DEF(short, short, "%hi", long, simple_strtol);
+STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", long, simple_strtol);
+STANDARD_PARAM_DEF(int, int, "%i", long, simple_strtol);
+STANDARD_PARAM_DEF(uint, unsigned int, "%u", long, simple_strtol);
+STANDARD_PARAM_DEF(long, long, "%li", long, simple_strtol);
+STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, simple_strtoul);
+
+int param_set_charp(const char *val, struct kernel_param *kp)
+{
+ if (!val) {
+ printk(KERN_ERR "%s: string parameter expected\n",
+ kp->name);
+ return -EINVAL;
+ }
+
+ if (strlen(val) > 1024) {
+ printk(KERN_ERR "%s: string parameter too long\n",
+ kp->name);
+ return -ENOSPC;
+ }
+
+ *(char **)kp->arg = (char *)val;
+ return 0;
+}
+
+int param_get_charp(char *buffer, struct kernel_param *kp)
+{
+ return sprintf(buffer, "%s", *((char **)kp->arg));
+}
+
+int param_set_bool(const char *val, struct kernel_param *kp)
+{
+ /* No equals means "set"... */
+ if (!val) val = "1";
+
+ /* One of =[yYnN01] */
+ switch (val[0]) {
+ case 'y': case 'Y': case '1':
+ *(int *)kp->arg = 1;
+ return 0;
+ case 'n': case 'N': case '0':
+ *(int *)kp->arg = 0;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+int param_get_bool(char *buffer, struct kernel_param *kp)
+{
+ /* Y and N chosen as being relatively non-coder friendly */
+ return sprintf(buffer, "%c", (*(int *)kp->arg) ? 'Y' : 'N');
+}
+
+int param_set_invbool(const char *val, struct kernel_param *kp)
+{
+ int boolval, ret;
+ struct kernel_param dummy = { .arg = &boolval };
+
+ ret = param_set_bool(val, &dummy);
+ if (ret == 0)
+ *(int *)kp->arg = !boolval;
+ return ret;
+}
+
+int param_get_invbool(char *buffer, struct kernel_param *kp)
+{
+ int val;
+ struct kernel_param dummy = { .arg = &val };
+
+ val = !*(int *)kp->arg;
+ return param_get_bool(buffer, &dummy);
+}
+
+/* We cheat here and temporarily mangle the string. */
+int param_array(const char *name,
+ const char *val,
+ unsigned int min, unsigned int max,
+ void *elem, int elemsize,
+ int (*set)(const char *, struct kernel_param *kp))
+{
+ int ret;
+ unsigned int count = 0;
+ struct kernel_param kp;
+
+ /* Get the name right for errors. */
+ kp.name = name;
+ kp.arg = elem;
+
+ /* No equals sign? */
+ if (!val) {
+ printk(KERN_ERR "%s: expects arguments\n", name);
+ return -EINVAL;
+ }
+
+ /* We expect a comma-separated list of values. */
+ do {
+ int len;
+ char save;
+
+ if (count > max) {
+ printk(KERN_ERR "%s: can only take %i arguments\n",
+ name, max);
+ return -EINVAL;
+ }
+ len = strcspn(val, ",");
+
+ /* Temporarily nul-terminate and parse */
+ save = val[len];
+ ((char *)val)[len] = '\0';
+ ret = set(val, &kp);
+ ((char *)val)[len] = save;
+
+ if (ret != 0)
+ return ret;
+ kp.arg += elemsize;
+ val += len+1;
+ count++;
+ } while (val[-1] == ',');
+
+ if (count < min) {
+ printk(KERN_ERR "%s: needs at least %i arguments\n",
+ name, min);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* First two elements are the max and min array length (which don't change) */
+int param_set_intarray(const char *val, struct kernel_param *kp)
+{
+ int *array;
+
+ /* Grab min and max as first two elements */
+ array = kp->arg;
+ return param_array(kp->name, val, array[0], array[1], &array[2],
+ sizeof(int), param_set_int);
+}
+
+int param_get_intarray(char *buffer, struct kernel_param *kp)
+{
+ int max;
+ int *array;
+ unsigned int i;
+
+ array = kp->arg;
+ max = array[1];
+
+ for (i = 2; i < max + 2; i++)
+ sprintf(buffer, "%s%i", i > 2 ? "," : "", array[i]);
+ return strlen(buffer);
+}
+
+int param_set_copystring(const char *val, struct kernel_param *kp)
+{
+ struct kparam_string *kps = kp->arg;
+
+ if (strlen(val)+1 > kps->maxlen) {
+ printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
+ kp->name, kps->maxlen-1);
+ return -ENOSPC;
+ }
+ strcpy(kps->string, val);
+ return 0;
+}
+
+EXPORT_SYMBOL(param_set_short);
+EXPORT_SYMBOL(param_get_short);
+EXPORT_SYMBOL(param_set_ushort);
+EXPORT_SYMBOL(param_get_ushort);
+EXPORT_SYMBOL(param_set_int);
+EXPORT_SYMBOL(param_get_int);
+EXPORT_SYMBOL(param_set_uint);
+EXPORT_SYMBOL(param_get_uint);
+EXPORT_SYMBOL(param_set_long);
+EXPORT_SYMBOL(param_get_long);
+EXPORT_SYMBOL(param_set_ulong);
+EXPORT_SYMBOL(param_get_ulong);
+EXPORT_SYMBOL(param_set_charp);
+EXPORT_SYMBOL(param_get_charp);
+EXPORT_SYMBOL(param_set_bool);
+EXPORT_SYMBOL(param_get_bool);
+EXPORT_SYMBOL(param_set_invbool);
+EXPORT_SYMBOL(param_get_invbool);
+EXPORT_SYMBOL(param_set_intarray);
+EXPORT_SYMBOL(param_get_intarray);
+EXPORT_SYMBOL(param_set_copystring);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .31348-linux-2.5-bk/lib/cmdline.c .31348-linux-2.5-bk.updated/lib/cmdline.c
--- .31348-linux-2.5-bk/lib/cmdline.c 2001-04-13 05:25:53.000000000 +1000
+++ .31348-linux-2.5-bk.updated/lib/cmdline.c 2002-11-16 09:22:03.000000000 +1100
@@ -64,12 +64,12 @@ int get_option (char **str, int *pint)
* completely parseable).
*/

-char *get_options (char *str, int nints, int *ints)
+char *get_options (const char *str, int nints, int *ints)
{
int res, i = 1;

while (i < nints) {
- res = get_option (&str, ints + i);
+ res = get_option ((char **)&str, ints + i);
if (res == 0)
break;
i++;
@@ -77,7 +77,7 @@ char *get_options (char *str, int nints,
break;
}
ints[0] = i - 1;
- return (str);
+ return (char *)str;
}

/**
-
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