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Commit 2039955c authored by Kai Germaschewski's avatar Kai Germaschewski
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do_mounts: move early MD setup into own file 

Again, just get rid of some #ifdefs by moving MD setup into
its own file which is only compiled when CONFIG_BLK_DEV_MD is set.
parent 224e4d06
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Showing with 275 additions and 266 deletions
init/Makefile
View file @ 2039955c
......@@ -4,6 +4,7 @@
obj-y := main.o version.o do_mounts.o initramfs.o
obj-$(CONFIG_DEVFS_FS) += do_mounts_devfs.o
obj-$(CONFIG_BLK_DEV_MD)+= do_mounts_md.o
# files to be removed upon make clean
clean-files := ../include/linux/compile.h
......
init/do_mounts.c
View file @ 2039955c
......@@ -14,8 +14,6 @@
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <linux/raid/md.h>
#include "do_mounts.h"
#define BUILD_CRAMDISK
......@@ -27,7 +25,6 @@ extern asmlinkage long sys_rmdir(const char *name);
extern asmlinkage long sys_chdir(const char *name);
extern asmlinkage long sys_fchdir(int fd);
extern asmlinkage long sys_chroot(const char *name);
extern asmlinkage long sys_ioctl(int fd, int cmd, unsigned long arg);
#ifdef CONFIG_BLK_DEV_INITRD
unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
......@@ -699,8 +696,6 @@ static int __init initrd_load(void)
return rd_load_image("/dev/initrd");
}
static void __init md_run_setup(void);
/*
* Prepare the namespace - decide what/where to mount, load ramdisks, etc.
*/
......@@ -909,259 +904,3 @@ static int __init crd_load(int in_fd, int out_fd)
#endif /* BUILD_CRAMDISK && CONFIG_BLK_DEV_RAM */
#ifdef CONFIG_BLK_DEV_MD
/*
* 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.
*/
struct {
int set;
int noautodetect;
} raid_setup_args __initdata;
static struct {
char device_set [MAX_MD_DEVS];
int pers[MAX_MD_DEVS];
int chunk[MAX_MD_DEVS];
char *device_names[MAX_MD_DEVS];
} md_setup_args __initdata;
/*
* 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;
char *pername = "";
char *str1 = str;
if (get_option(&str, &minor) != 2) { /* MD Number */
printk(KERN_WARNING "md: Too few arguments supplied to md=.\n");
return 0;
}
if (minor >= MAX_MD_DEVS) {
printk(KERN_WARNING "md: md=%d, Minor device number too high.\n", minor);
return 0;
} else if (md_setup_args.device_names[minor]) {
printk(KERN_WARNING "md: md=%d, Specified more than once. "
"Replacing previous definition.\n", minor);
}
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.pers[minor] = level;
md_setup_args.chunk[minor] = 1 << (factor+12);
switch(level) {
case LEVEL_LINEAR:
pers = LINEAR;
pername = "linear";
break;
case 0:
pers = RAID0;
pername = "raid0";
break;
default:
printk(KERN_WARNING
"md: The kernel has not been configured for raid%d support!\n",
level);
return 0;
}
md_setup_args.pers[minor] = pers;
break;
}
/* FALL THROUGH */
case 1: /* the first device is numeric */
str = str1;
/* FALL THROUGH */
case 0:
md_setup_args.pers[minor] = 0;
pername="super-block";
}
printk(KERN_INFO "md: Will configure md%d (%s) from %s, below.\n",
minor, pername, str);
md_setup_args.device_names[minor] = str;
return 1;
}
static void __init md_setup_drive(void)
{
int minor, i;
dev_t dev;
dev_t devices[MD_SB_DISKS+1];
for (minor = 0; minor < MAX_MD_DEVS; minor++) {
int fd;
int err = 0;
char *devname;
mdu_disk_info_t dinfo;
char name[16], devfs_name[16];
if (!(devname = md_setup_args.device_names[minor]))
continue;
sprintf(name, "/dev/md%d", minor);
sprintf(devfs_name, "/dev/md/%d", minor);
create_dev(name, MKDEV(MD_MAJOR, minor), devfs_name);
for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
char *p;
char comp_name[64];
struct stat buf;
p = strchr(devname, ',');
if (p)
*p++ = 0;
dev = name_to_dev_t(devname);
if (strncmp(devname, "/dev/", 5))
devname += 5;
snprintf(comp_name, 63, "/dev/%s", devname);
if (sys_newstat(comp_name, &buf) == 0 &&
S_ISBLK(buf.st_mode))
dev = buf.st_rdev;
if (!dev) {
printk(KERN_WARNING "md: Unknown device name: %s\n", devname);
break;
}
devices[i] = dev;
md_setup_args.device_set[minor] = 1;
devname = p;
}
devices[i] = 0;
if (!md_setup_args.device_set[minor])
continue;
printk(KERN_INFO "md: Loading md%d: %s\n", minor, md_setup_args.device_names[minor]);
fd = open(name, 0, 0);
if (fd < 0) {
printk(KERN_ERR "md: open failed - cannot start array %d\n", minor);
continue;
}
if (sys_ioctl(fd, SET_ARRAY_INFO, 0) == -EBUSY) {
printk(KERN_WARNING
"md: Ignoring md=%d, already autodetected. (Use raid=noautodetect)\n",
minor);
close(fd);
continue;
}
if (md_setup_args.pers[minor]) {
/* non-persistent */
mdu_array_info_t ainfo;
ainfo.level = pers_to_level(md_setup_args.pers[minor]);
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.chunk[minor];
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);
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_setup_args.noautodetect = 1;
pos += wlen+1;
}
raid_setup_args.set = 1;
return 1;
}
__setup("raid=", raid_setup);
__setup("md=", md_setup);
#endif
static void __init md_run_setup(void)
{
#ifdef CONFIG_BLK_DEV_MD
create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0");
if (raid_setup_args.noautodetect)
printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
else {
int fd = open("/dev/md0", 0, 0);
if (fd >= 0) {
sys_ioctl(fd, RAID_AUTORUN, 0);
close(fd);
}
}
md_setup_drive();
#endif
}
init/do_mounts.h
View file @ 2039955c
......@@ -7,12 +7,15 @@
#include <linux/slab.h>
#include <linux/mount.h>
extern asmlinkage long sys_unlink(const char *name);
extern asmlinkage long sys_mknod(const char *name, int mode, dev_t dev);
extern asmlinkage long sys_newstat(char * filename, struct stat * statbuf);
extern asmlinkage long sys_mount(char *dev_name, char *dir_name, char *type,
asmlinkage long sys_unlink(const char *name);
asmlinkage long sys_mknod(const char *name, int mode, dev_t dev);
asmlinkage long sys_newstat(char * filename, struct stat * statbuf);
asmlinkage long sys_ioctl(int fd, int cmd, unsigned long arg);
asmlinkage long sys_mount(char *dev_name, char *dir_name, char *type,
unsigned long flags, void *data);
extern asmlinkage long sys_umount(char *name, int flags);
asmlinkage long sys_umount(char *name, int flags);
dev_t name_to_dev_t(char *name);
#ifdef CONFIG_DEVFS_FS
......@@ -33,3 +36,13 @@ static inline int create_dev(char *name, dev_t dev, char *devfs_name)
}
#endif
#ifdef CONFIG_BLK_DEV_MD
void md_run_setup(void);
#else
static inline void md_run_setup(void) {}
#endif
init/do_mounts_md.c 0 → 100644
View file @ 2039955c
#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.
*/
struct {
int set;
int noautodetect;
} raid_setup_args __initdata;
static struct {
char device_set [MAX_MD_DEVS];
int pers[MAX_MD_DEVS];
int chunk[MAX_MD_DEVS];
char *device_names[MAX_MD_DEVS];
} md_setup_args __initdata;
/*
* 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;
char *pername = "";
char *str1 = str;
if (get_option(&str, &minor) != 2) { /* MD Number */
printk(KERN_WARNING "md: Too few arguments supplied to md=.\n");
return 0;
}
if (minor >= MAX_MD_DEVS) {
printk(KERN_WARNING "md: md=%d, Minor device number too high.\n", minor);
return 0;
} else if (md_setup_args.device_names[minor]) {
printk(KERN_WARNING "md: md=%d, Specified more than once. "
"Replacing previous definition.\n", minor);
}
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.pers[minor] = level;
md_setup_args.chunk[minor] = 1 << (factor+12);
switch(level) {
case LEVEL_LINEAR:
pers = LINEAR;
pername = "linear";
break;
case 0:
pers = RAID0;
pername = "raid0";
break;
default:
printk(KERN_WARNING
"md: The kernel has not been configured for raid%d support!\n",
level);
return 0;
}
md_setup_args.pers[minor] = pers;
break;
}
/* FALL THROUGH */
case 1: /* the first device is numeric */
str = str1;
/* FALL THROUGH */
case 0:
md_setup_args.pers[minor] = 0;
pername="super-block";
}
printk(KERN_INFO "md: Will configure md%d (%s) from %s, below.\n",
minor, pername, str);
md_setup_args.device_names[minor] = str;
return 1;
}
static void __init md_setup_drive(void)
{
int minor, i;
dev_t dev;
dev_t devices[MD_SB_DISKS+1];
for (minor = 0; minor < MAX_MD_DEVS; minor++) {
int fd;
int err = 0;
char *devname;
mdu_disk_info_t dinfo;
char name[16], devfs_name[16];
if (!(devname = md_setup_args.device_names[minor]))
continue;
sprintf(name, "/dev/md%d", minor);
sprintf(devfs_name, "/dev/md/%d", minor);
create_dev(name, MKDEV(MD_MAJOR, minor), devfs_name);
for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
char *p;
char comp_name[64];
struct stat buf;
p = strchr(devname, ',');
if (p)
*p++ = 0;
dev = name_to_dev_t(devname);
if (strncmp(devname, "/dev/", 5))
devname += 5;
snprintf(comp_name, 63, "/dev/%s", devname);
if (sys_newstat(comp_name, &buf) == 0 &&
S_ISBLK(buf.st_mode))
dev = buf.st_rdev;
if (!dev) {
printk(KERN_WARNING "md: Unknown device name: %s\n", devname);
break;
}
devices[i] = dev;
md_setup_args.device_set[minor] = 1;
devname = p;
}
devices[i] = 0;
if (!md_setup_args.device_set[minor])
continue;
printk(KERN_INFO "md: Loading md%d: %s\n", minor, md_setup_args.device_names[minor]);
fd = open(name, 0, 0);
if (fd < 0) {
printk(KERN_ERR "md: open failed - cannot start array %d\n", minor);
continue;
}
if (sys_ioctl(fd, SET_ARRAY_INFO, 0) == -EBUSY) {
printk(KERN_WARNING
"md: Ignoring md=%d, already autodetected. (Use raid=noautodetect)\n",
minor);
close(fd);
continue;
}
if (md_setup_args.pers[minor]) {
/* non-persistent */
mdu_array_info_t ainfo;
ainfo.level = pers_to_level(md_setup_args.pers[minor]);
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.chunk[minor];
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);
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_setup_args.noautodetect = 1;
pos += wlen+1;
}
raid_setup_args.set = 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_setup_args.noautodetect)
printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
else {
int fd = open("/dev/md0", 0, 0);
if (fd >= 0) {
sys_ioctl(fd, RAID_AUTORUN, 0);
close(fd);
}
}
md_setup_drive();
}
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