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,-1,factor,fault,device-list  uses LINEAR for device n
53  *             md=n,device-list      reads a RAID superblock from the devices
54  *             elements in device-list are read by name_to_kdev_t so can be
56  * 2001-06-03: Dave Cinege <dcinege@psychosis.com>
62 	int minor, level, factor, fault, partitioned = 0;  in md_setup()  local
84 		printk(KERN_WARNING "md: md=%s%d - too many md initialisations\n", partitioned?"d":"", minor);  in md_setup()
89 	switch (get_option(&str, &level)) {	/* RAID level */  in md_setup()
90 	case 2: /* could be 0 or -1.. */  in md_setup()
91 		if (level == 0 || level == LEVEL_LINEAR) {  in md_setup()
97 			md_setup_args[ent].level = level;  in md_setup()
99 			if (level ==  LEVEL_LINEAR)  in md_setup()
110 		md_setup_args[ent].level = LEVEL_NONE;  in md_setup()
111 		pername="super-block";  in md_setup()
125 	char *devname = args->device_names;  in md_setup_drive()
132 	if (args->partitioned) {  in md_setup_drive()
133 		mdev = MKDEV(mdp_major, args->minor << MdpMinorShift);  in md_setup_drive()
134 		sprintf(name, "md_d%d", args->minor);  in md_setup_drive()
136 		mdev = MKDEV(MD_MAJOR, args->minor);  in md_setup_drive()
137 		sprintf(name, "md%d", args->minor);  in md_setup_drive()
170 	pr_info("md: Loading %s: %s\n", name, args->device_names);  in md_setup_drive()
174 		pr_err("md: md_alloc failed - cannot start array %s\n", name);  in md_setup_drive()
184 	if (!list_empty(&mddev->disks) || mddev->raid_disks) {  in md_setup_drive()
190 	if (args->level != LEVEL_NONE) {  in md_setup_drive()
191 		/* non-persistent */  in md_setup_drive()
192 		ainfo.level = args->level;  in md_setup_drive()
193 		ainfo.md_minor = args->minor;  in md_setup_drive()
196 		ainfo.chunk_size = args->chunk;  in md_setup_drive()
209 		if (args->level != LEVEL_NONE) {  in md_setup_drive()
240 			wlen = (comma-str)-pos;  in raid_setup()
241 		else	wlen = (len-1)-pos;  in raid_setup()
262 	 * Since we don't want to detect and use half a raid array, we need to  in autodetect_raid()