Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *                  Volker Sameske <sameske@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Bugreports.to..: <Linux390@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright IBM Corp. 1999, 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/hdreg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/dasd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <asm/ebcdic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/vtoc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/dasd_mod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "check.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) union label_t {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct vtoc_volume_label_cdl vol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct vtoc_volume_label_ldl lnx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct vtoc_cms_label cms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * compute the block number from a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * cyl-cyl-head-head structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static sector_t cchh2blk(struct vtoc_cchh *ptr, struct hd_geometry *geo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	sector_t cyl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	__u16 head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	/* decode cylinder and heads for large volumes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	cyl = ptr->hh & 0xFFF0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	cyl <<= 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	cyl |= ptr->cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	head = ptr->hh & 0x000F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return cyl * geo->heads * geo->sectors +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	       head * geo->sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * compute the block number from a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * cyl-cyl-head-head-block structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static sector_t cchhb2blk(struct vtoc_cchhb *ptr, struct hd_geometry *geo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	sector_t cyl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	__u16 head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	/* decode cylinder and heads for large volumes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	cyl = ptr->hh & 0xFFF0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	cyl <<= 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	cyl |= ptr->cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	head = ptr->hh & 0x000F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	return	cyl * geo->heads * geo->sectors +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		head * geo->sectors +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		ptr->b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static int find_label(struct parsed_partitions *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		      dasd_information2_t *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		      struct hd_geometry *geo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		      int blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		      sector_t *labelsect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		      char name[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		      char type[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		      union label_t *label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	sector_t testsect[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	unsigned char temp[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int found = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	int i, testcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	/* There a three places where we may find a valid label:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	 * - on an ECKD disk it's block 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	 * - on an FBA disk it's block 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	 * - on an CMS formatted FBA disk it is sector 1, even if the block size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	 *   is larger than 512 bytes (possible if the DIAG discipline is used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	 * If we have a valid info structure, then we know exactly which case we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	 * have, otherwise we just search through all possebilities.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	if (info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		    (info->cu_type == 0x3880 && info->dev_type == 0x3370))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			testsect[0] = info->label_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			testsect[0] = info->label_block * (blocksize >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		testcount = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		testsect[0] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		testsect[1] = (blocksize >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		testsect[2] = 2 * (blocksize >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		testcount = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	for (i = 0; i < testcount; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		data = read_part_sector(state, testsect[i], &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		if (data == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		memcpy(label, data, sizeof(*label));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		memcpy(temp, data, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		temp[4] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		EBCASC(temp, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		if (!strcmp(temp, "VOL1") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		    !strcmp(temp, "LNX1") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		    !strcmp(temp, "CMS1")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			if (!strcmp(temp, "VOL1")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				strncpy(type, label->vol.vollbl, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				strncpy(name, label->vol.volid, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				strncpy(type, label->lnx.vollbl, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 				strncpy(name, label->lnx.volid, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			EBCASC(type, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			EBCASC(name, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			*labelsect = testsect[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (!found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		memset(label, 0, sizeof(*label));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int find_vol1_partitions(struct parsed_partitions *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				struct hd_geometry *geo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 				int blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 				char name[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 				union label_t *label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	sector_t blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	int counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	char tmp[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	loff_t offset, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct vtoc_format1_label f1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	int secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	 * get start of VTOC from the disk label and then search for format1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	 * and format8 labels
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	secperblk = blocksize >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	data = read_part_sector(state, blk * secperblk, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	while (data != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		memcpy(&f1, data, sizeof(struct vtoc_format1_label));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		/* skip FMT4 / FMT5 / FMT7 labels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		if (f1.DS1FMTID == _ascebc['4']
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		    || f1.DS1FMTID == _ascebc['5']
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		    || f1.DS1FMTID == _ascebc['7']
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		    || f1.DS1FMTID == _ascebc['9']) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			blk++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			data = read_part_sector(state, blk * secperblk, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		/* only FMT1 and 8 labels valid at this point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		if (f1.DS1FMTID != _ascebc['1'] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		    f1.DS1FMTID != _ascebc['8'])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		/* OK, we got valid partition data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		size  = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			offset + geo->sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		offset *= secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		size *= secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if (counter >= state->limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		put_partition(state, counter + 1, offset, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		counter++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		blk++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		data = read_part_sector(state, blk * secperblk, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int find_lnx1_partitions(struct parsed_partitions *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 				struct hd_geometry *geo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 				int blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 				char name[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 				union label_t *label,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				sector_t labelsect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 				loff_t i_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 				dasd_information2_t *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	loff_t offset, geo_size, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	char tmp[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	int secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	secperblk = blocksize >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (label->lnx.ldl_version == 0xf2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		size = label->lnx.formatted_blocks * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		 * Formated w/o large volume support. If the sanity check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		 * 'size based on geo == size based on i_size' is true, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		 * we can safely assume that we know the formatted size of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		 * the disk, otherwise we need additional information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		 * that we can only get from a real DASD device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		geo_size = geo->cylinders * geo->heads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			* geo->sectors * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		size = i_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		if (size != geo_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			if (!info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 				strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 				return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			if (!strcmp(info->type, "ECKD"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 				if (geo_size < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 					size = geo_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			/* else keep size based on i_size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	/* first and only partition starts in the first block after the label */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	offset = labelsect + secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	put_partition(state, 1, offset, size - offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static int find_cms1_partitions(struct parsed_partitions *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 				struct hd_geometry *geo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 				int blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				char name[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 				union label_t *label,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 				sector_t labelsect)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	loff_t offset, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	char tmp[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	int secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	 * VM style CMS1 labeled disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	blocksize = label->cms.block_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	secperblk = blocksize >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (label->cms.disk_offset != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		/* disk is reserved minidisk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		offset = label->cms.disk_offset * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		size = (label->cms.block_count - 1) * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		 * Special case for FBA devices:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		 * If an FBA device is CMS formatted with blocksize > 512 byte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		 * and the DIAG discipline is used, then the CMS label is found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		 * in sector 1 instead of block 1. However, the partition is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		 * still supposed to start in block 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		if (labelsect == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 			offset = 2 * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			offset = labelsect + secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		size = label->cms.block_count * secperblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	put_partition(state, 1, offset, size-offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)  * This is the main function, called by check.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int ibm_partition(struct parsed_partitions *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	int (*fn)(struct gendisk *disk, dasd_information2_t *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	struct block_device *bdev = state->bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int blocksize, res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	loff_t i_size, offset, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	dasd_information2_t *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	struct hd_geometry *geo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	char type[5] = {0,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	char name[7] = {0,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	sector_t labelsect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	union label_t *label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (!disk->fops->getgeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		goto out_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	fn = symbol_get(dasd_biodasdinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	blocksize = bdev_logical_block_size(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	if (blocksize <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		goto out_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	i_size = i_size_read(bdev->bd_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	if (i_size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		goto out_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	if (info == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		goto out_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	if (geo == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		goto out_nogeo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	label = kmalloc(sizeof(union label_t), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	if (label == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		goto out_nolab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	/* set start if not filled by getgeo function e.g. virtblk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	geo->start = get_start_sect(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	if (disk->fops->getgeo(bdev, geo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		goto out_freeall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (!fn || fn(disk, info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (find_label(state, info, geo, blocksize, &labelsect, name, type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		       label)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		if (!strncmp(type, "VOL1", 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 			res = find_vol1_partitions(state, geo, blocksize, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 						   label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		} else if (!strncmp(type, "LNX1", 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 			res = find_lnx1_partitions(state, geo, blocksize, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 						   label, labelsect, i_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 						   info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		} else if (!strncmp(type, "CMS1", 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 			res = find_cms1_partitions(state, geo, blocksize, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 						   label, labelsect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	} else if (info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		 * ugly but needed for backward compatibility:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		 * If the block device is a DASD (i.e. BIODASDINFO2 works),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		 * then we claim it in any case, even though it has no valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		 * label. If it has the LDL format, then we simply define a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		 * partition as if it had an LNX1 label.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		res = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		if (info->format == DASD_FORMAT_LDL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 			strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 			size = i_size >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 			offset = (info->label_block + 1) * (blocksize >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 			put_partition(state, 1, offset, size-offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 			strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) out_freeall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	kfree(label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) out_nolab:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	kfree(geo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) out_nogeo:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) out_symbol:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	if (fn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		symbol_put(dasd_biodasdinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) out_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }