Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
ef1597d5 | 2 | * File...........: linux/fs/partitions/ibm.c |
1da177e4 LT |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
4 | * Volker Sameske <sameske@de.ibm.com> | |
5 | * Bugreports.to..: <Linux390@de.ibm.com> | |
6 | * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include <linux/buffer_head.h> |
10 | #include <linux/hdreg.h> | |
11 | #include <linux/slab.h> | |
12 | #include <asm/dasd.h> | |
13 | #include <asm/ebcdic.h> | |
14 | #include <asm/uaccess.h> | |
15 | #include <asm/vtoc.h> | |
16 | ||
17 | #include "check.h" | |
18 | #include "ibm.h" | |
19 | ||
20 | /* | |
ef1597d5 | 21 | * compute the block number from a |
1da177e4 LT |
22 | * cyl-cyl-head-head structure |
23 | */ | |
24 | static inline int | |
4cd5b9f6 | 25 | cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) { |
1da177e4 LT |
26 | return ptr->cc * geo->heads * geo->sectors + |
27 | ptr->hh * geo->sectors; | |
28 | } | |
29 | ||
1da177e4 | 30 | /* |
ef1597d5 | 31 | * compute the block number from a |
1da177e4 LT |
32 | * cyl-cyl-head-head-block structure |
33 | */ | |
34 | static inline int | |
4cd5b9f6 | 35 | cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) { |
1da177e4 LT |
36 | return ptr->cc * geo->heads * geo->sectors + |
37 | ptr->hh * geo->sectors + | |
38 | ptr->b; | |
39 | } | |
40 | ||
41 | /* | |
42 | */ | |
ef1597d5 | 43 | int |
1da177e4 LT |
44 | ibm_partition(struct parsed_partitions *state, struct block_device *bdev) |
45 | { | |
46 | int blocksize, offset, size; | |
90f0094d | 47 | loff_t i_size; |
1da177e4 LT |
48 | dasd_information_t *info; |
49 | struct hd_geometry *geo; | |
50 | char type[5] = {0,}; | |
51 | char name[7] = {0,}; | |
56dc6a88 PO |
52 | union label_t { |
53 | struct vtoc_volume_label vol; | |
54 | struct vtoc_cms_label cms; | |
55 | } *label; | |
1da177e4 LT |
56 | unsigned char *data; |
57 | Sector sect; | |
58 | ||
90f0094d HH |
59 | blocksize = bdev_hardsect_size(bdev); |
60 | if (blocksize <= 0) | |
61 | return 0; | |
62 | i_size = i_size_read(bdev->bd_inode); | |
63 | if (i_size == 0) | |
64 | return 0; | |
65 | ||
1da177e4 LT |
66 | if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL) |
67 | goto out_noinfo; | |
68 | if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL) | |
69 | goto out_nogeo; | |
56dc6a88 PO |
70 | if ((label = kmalloc(sizeof(union label_t), GFP_KERNEL)) == NULL) |
71 | goto out_nolab; | |
ef1597d5 | 72 | |
1da177e4 LT |
73 | if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 || |
74 | ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0) | |
75 | goto out_noioctl; | |
1da177e4 LT |
76 | |
77 | /* | |
78 | * Get volume label, extract name and type. | |
79 | */ | |
80 | data = read_dev_sector(bdev, info->label_block*(blocksize/512), §); | |
81 | if (data == NULL) | |
82 | goto out_readerr; | |
83 | ||
84 | strncpy (type, data, 4); | |
85 | if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) | |
86 | strncpy(name, data + 8, 6); | |
87 | else | |
88 | strncpy(name, data + 4, 6); | |
56dc6a88 | 89 | memcpy(label, data, sizeof(union label_t)); |
1da177e4 LT |
90 | put_dev_sector(sect); |
91 | ||
92 | EBCASC(type, 4); | |
93 | EBCASC(name, 6); | |
94 | ||
95 | /* | |
96 | * Three different types: CMS1, VOL1 and LNX1/unlabeled | |
97 | */ | |
98 | if (strncmp(type, "CMS1", 4) == 0) { | |
99 | /* | |
100 | * VM style CMS1 labeled disk | |
101 | */ | |
56dc6a88 | 102 | if (label->cms.disk_offset != 0) { |
1da177e4 LT |
103 | printk("CMS1/%8s(MDSK):", name); |
104 | /* disk is reserved minidisk */ | |
56dc6a88 PO |
105 | blocksize = label->cms.block_size; |
106 | offset = label->cms.disk_offset; | |
107 | size = (label->cms.block_count - 1) * (blocksize >> 9); | |
1da177e4 LT |
108 | } else { |
109 | printk("CMS1/%8s:", name); | |
110 | offset = (info->label_block + 1); | |
90f0094d | 111 | size = i_size >> 9; |
1da177e4 LT |
112 | } |
113 | put_partition(state, 1, offset*(blocksize >> 9), | |
114 | size-offset*(blocksize >> 9)); | |
115 | } else if ((strncmp(type, "VOL1", 4) == 0) && | |
116 | (!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) { | |
117 | /* | |
118 | * New style VOL1 labeled disk | |
119 | */ | |
120 | unsigned int blk; | |
121 | int counter; | |
122 | ||
123 | printk("VOL1/%8s:", name); | |
124 | ||
125 | /* get block number and read then go through format1 labels */ | |
56dc6a88 | 126 | blk = cchhb2blk(&label->vol.vtoc, geo) + 1; |
1da177e4 LT |
127 | counter = 0; |
128 | while ((data = read_dev_sector(bdev, blk*(blocksize/512), | |
129 | §)) != NULL) { | |
4cd5b9f6 | 130 | struct vtoc_format1_label f1; |
1da177e4 | 131 | |
4cd5b9f6 | 132 | memcpy(&f1, data, sizeof(struct vtoc_format1_label)); |
1da177e4 LT |
133 | put_dev_sector(sect); |
134 | ||
135 | /* skip FMT4 / FMT5 / FMT7 labels */ | |
136 | if (f1.DS1FMTID == _ascebc['4'] | |
137 | || f1.DS1FMTID == _ascebc['5'] | |
138 | || f1.DS1FMTID == _ascebc['7']) { | |
139 | blk++; | |
140 | continue; | |
141 | } | |
142 | ||
143 | /* only FMT1 valid at this point */ | |
144 | if (f1.DS1FMTID != _ascebc['1']) | |
145 | break; | |
146 | ||
147 | /* OK, we got valid partition data */ | |
148 | offset = cchh2blk(&f1.DS1EXT1.llimit, geo); | |
ef1597d5 | 149 | size = cchh2blk(&f1.DS1EXT1.ulimit, geo) - |
1da177e4 LT |
150 | offset + geo->sectors; |
151 | if (counter >= state->limit) | |
152 | break; | |
ef1597d5 HH |
153 | put_partition(state, counter + 1, |
154 | offset * (blocksize >> 9), | |
155 | size * (blocksize >> 9)); | |
1da177e4 LT |
156 | counter++; |
157 | blk++; | |
158 | } | |
159 | } else { | |
160 | /* | |
161 | * Old style LNX1 or unlabeled disk | |
162 | */ | |
163 | if (strncmp(type, "LNX1", 4) == 0) | |
164 | printk ("LNX1/%8s:", name); | |
165 | else | |
166 | printk("(nonl)/%8s:", name); | |
167 | offset = (info->label_block + 1); | |
90f0094d | 168 | size = i_size >> 9; |
1da177e4 | 169 | put_partition(state, 1, offset*(blocksize >> 9), |
ef1597d5 | 170 | size-offset*(blocksize >> 9)); |
1da177e4 LT |
171 | } |
172 | ||
173 | printk("\n"); | |
56dc6a88 | 174 | kfree(label); |
1da177e4 LT |
175 | kfree(geo); |
176 | kfree(info); | |
177 | return 1; | |
ef1597d5 | 178 | |
1da177e4 | 179 | out_readerr: |
1da177e4 | 180 | out_noioctl: |
56dc6a88 PO |
181 | kfree(label); |
182 | out_nolab: | |
1da177e4 LT |
183 | kfree(geo); |
184 | out_nogeo: | |
185 | kfree(info); | |
186 | out_noinfo: | |
187 | return 0; | |
188 | } |