1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/raid/detect.h>
33 	int level;  member
41  * Parse the command-line parameters given our kernel, but do not
43  * md_setup_drive after the low-level disk drivers have initialised.
49  *             instead of just one.  -- KTK
50  * 18May2000: Added support for persistent-superblock arrays:
51  *             md=n,0,factor,fault,device-list   uses RAID0 for device n
52  *             md=n,device-list      reads a RAID superblock from the devices
53  *             elements in device-list are read by name_to_kdev_t so can be
55  * 2001-06-03: Dave Cinege <dcinege@psychosis.com>
61 	int minor, level, factor, fault, partitioned = 0;  in md_setup()  local
83 		printk(KERN_WARNING "md: md=%s%d - too many md initialisations\n", partitioned?"d":"", minor);  in md_setup()
88 	switch (get_option(&str, &level)) {	/* RAID level */  in md_setup()
89 	case 2: /* could be 0 or -1.. */  in md_setup()
90 		if (level == 0) {  in md_setup()
96 			md_setup_args[ent].level = level;  in md_setup()
106 		md_setup_args[ent].level = LEVEL_NONE;  in md_setup()
107 		pername="super-block";  in md_setup()
121 	char *devname = args->device_names;  in md_setup_drive()
128 	if (args->partitioned) {  in md_setup_drive()
129 		mdev = MKDEV(mdp_major, args->minor << MdpMinorShift);  in md_setup_drive()
130 		sprintf(name, "md_d%d", args->minor);  in md_setup_drive()
132 		mdev = MKDEV(MD_MAJOR, args->minor);  in md_setup_drive()
133 		sprintf(name, "md%d", args->minor);  in md_setup_drive()
166 	pr_info("md: Loading %s: %s\n", name, args->device_names);  in md_setup_drive()
170 		pr_err("md: md_alloc failed - cannot start array %s\n", name);  in md_setup_drive()
180 	if (!list_empty(&mddev->disks) || mddev->raid_disks) {  in md_setup_drive()
186 	if (args->level != LEVEL_NONE) {  in md_setup_drive()
187 		/* non-persistent */  in md_setup_drive()
188 		ainfo.level = args->level;  in md_setup_drive()
189 		ainfo.md_minor = args->minor;  in md_setup_drive()
192 		ainfo.chunk_size = args->chunk;  in md_setup_drive()
205 		if (args->level != LEVEL_NONE) {  in md_setup_drive()
236 			wlen = (comma-str)-pos;  in raid_setup()
237 		else	wlen = (len-1)-pos;  in raid_setup()
258 	 * Since we don't want to detect and use half a raid array, we need to  in autodetect_raid()