Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 290 insertions, 0 deletions

diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
new file mode 100644
index 000000000000..3fbc3555ce96
--- /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();
+}