nfs: new subdir Documentation/filesystems/nfs

[safe/jmp/linux-2.6] / init / do_mounts_md.c

diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index 2429e1b..69aebbf 100644 (file)
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -1,5 +1,6 @@
-
-#include <linux/raid/md.h>
+#include <linux/delay.h>
+#include <linux/raid/md_u.h>
+#include <linux/raid/md_p.h>
 
 #include "do_mounts.h"
 
@@ -12,7 +13,12 @@
  * The code for that is here.
  */
 
-static int __initdata raid_noautodetect, raid_autopart;
+#ifdef CONFIG_MD_AUTODETECT
+static int __initdata raid_noautodetect;
+#else
+static int __initdata raid_noautodetect=1;
+#endif
+static int __initdata raid_autopart;
 
 static struct {
        int minor;
@@ -20,11 +26,10 @@ static struct {
        int level;
        int chunk;
        char *device_names;
-} md_setup_args[MAX_MD_DEVS] __initdata;
+} md_setup_args[256] __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
@@ -61,10 +66,6 @@ static int __init md_setup(char *str)
                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) {
@@ -72,7 +73,7 @@ static int __init md_setup(char *str)
                               "Replacing previous definition.\n", partitioned?"d":"", minor);
                        break;
                }
-       if (ent >= MAX_MD_DEVS) {
+       if (ent >= ARRAY_SIZE(md_setup_args)) {
                printk(KERN_WARNING "md: md=%s%d - too many md initialisations\n", partitioned?"d":"", minor);
                return 0;
        }
@@ -112,8 +113,6 @@ static int __init md_setup(char *str)
        return 1;
 }
 
-#define MdpMinorShift 6
-
 static void __init md_setup_drive(void)
 {
        int minor, i, ent, partitioned;
@@ -137,7 +136,7 @@ static void __init md_setup_drive(void)
                else
                        dev = MKDEV(MD_MAJOR, minor);
                create_dev(name, dev);
-               for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
+               for (i = 0; i < MD_SB_DISKS && devname != NULL; i++) {
                        char *p;
                        char comp_name[64];
                        u32 rdev;
@@ -257,6 +256,8 @@ static int __init raid_setup(char *str)
 
                if (!strncmp(str, "noautodetect", wlen))
                        raid_noautodetect = 1;
+               if (!strncmp(str, "autodetect", wlen))
+                       raid_noautodetect = 0;
                if (strncmp(str, "partitionable", wlen)==0)
                        raid_autopart = 1;
                if (strncmp(str, "part", wlen)==0)
@@ -269,17 +270,33 @@ static int __init raid_setup(char *str)
 __setup("raid=", raid_setup);
 __setup("md=", md_setup);
 
+static void __init autodetect_raid(void)
+{
+       int fd;
+
+       /*
+        * Since we don't want to detect and use half a raid array, we need to
+        * wait for the known devices to complete their probing
+        */
+       printk(KERN_INFO "md: Waiting for all devices to be available before autodetect\n");
+       printk(KERN_INFO "md: If you don't use raid, use raid=noautodetect\n");
+
+       wait_for_device_probe();
+
+       fd = sys_open("/dev/md0", 0, 0);
+       if (fd >= 0) {
+               sys_ioctl(fd, RAID_AUTORUN, raid_autopart);
+               sys_close(fd);
+       }
+}
+
 void __init md_run_setup(void)
 {
        create_dev("/dev/md0", MKDEV(MD_MAJOR, 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);
-               }
-       }
+               printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=autodetect will force)\n");
+       else
+               autodetect_raid();
        md_setup_drive();
 }