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Commit | Line | Data |
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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 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/buffer_head.h> | |
11 | #include <linux/hdreg.h> | |
12 | #include <linux/slab.h> | |
13 | #include <asm/dasd.h> | |
14 | #include <asm/ebcdic.h> | |
15 | #include <asm/uaccess.h> | |
16 | #include <asm/vtoc.h> | |
17 | ||
18 | #include "check.h" | |
19 | #include "ibm.h" | |
20 | ||
21 | /* | |
ef1597d5 | 22 | * compute the block number from a |
1da177e4 LT |
23 | * cyl-cyl-head-head structure |
24 | */ | |
25 | static inline int | |
4cd5b9f6 | 26 | cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) { |
1da177e4 LT |
27 | return ptr->cc * geo->heads * geo->sectors + |
28 | ptr->hh * geo->sectors; | |
29 | } | |
30 | ||
1da177e4 | 31 | /* |
ef1597d5 | 32 | * compute the block number from a |
1da177e4 LT |
33 | * cyl-cyl-head-head-block structure |
34 | */ | |
35 | static inline int | |
4cd5b9f6 | 36 | cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) { |
1da177e4 LT |
37 | return ptr->cc * geo->heads * geo->sectors + |
38 | ptr->hh * geo->sectors + | |
39 | ptr->b; | |
40 | } | |
41 | ||
42 | /* | |
43 | */ | |
ef1597d5 | 44 | int |
1da177e4 LT |
45 | ibm_partition(struct parsed_partitions *state, struct block_device *bdev) |
46 | { | |
47 | int blocksize, offset, size; | |
90f0094d | 48 | loff_t i_size; |
1da177e4 LT |
49 | dasd_information_t *info; |
50 | struct hd_geometry *geo; | |
51 | char type[5] = {0,}; | |
52 | char name[7] = {0,}; | |
56dc6a88 PO |
53 | union label_t { |
54 | struct vtoc_volume_label vol; | |
55 | struct vtoc_cms_label cms; | |
56 | } *label; | |
1da177e4 LT |
57 | unsigned char *data; |
58 | Sector sect; | |
59 | ||
90f0094d HH |
60 | blocksize = bdev_hardsect_size(bdev); |
61 | if (blocksize <= 0) | |
62 | return 0; | |
63 | i_size = i_size_read(bdev->bd_inode); | |
64 | if (i_size == 0) | |
65 | return 0; | |
66 | ||
1da177e4 LT |
67 | if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL) |
68 | goto out_noinfo; | |
69 | if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL) | |
70 | goto out_nogeo; | |
56dc6a88 PO |
71 | if ((label = kmalloc(sizeof(union label_t), GFP_KERNEL)) == NULL) |
72 | goto out_nolab; | |
ef1597d5 | 73 | |
1da177e4 LT |
74 | if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 || |
75 | ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0) | |
76 | goto out_noioctl; | |
1da177e4 LT |
77 | |
78 | /* | |
79 | * Get volume label, extract name and type. | |
80 | */ | |
81 | data = read_dev_sector(bdev, info->label_block*(blocksize/512), §); | |
82 | if (data == NULL) | |
83 | goto out_readerr; | |
84 | ||
85 | strncpy (type, data, 4); | |
86 | if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) | |
87 | strncpy(name, data + 8, 6); | |
88 | else | |
89 | strncpy(name, data + 4, 6); | |
56dc6a88 | 90 | memcpy(label, data, sizeof(union label_t)); |
1da177e4 LT |
91 | put_dev_sector(sect); |
92 | ||
93 | EBCASC(type, 4); | |
94 | EBCASC(name, 6); | |
95 | ||
96 | /* | |
97 | * Three different types: CMS1, VOL1 and LNX1/unlabeled | |
98 | */ | |
99 | if (strncmp(type, "CMS1", 4) == 0) { | |
100 | /* | |
101 | * VM style CMS1 labeled disk | |
102 | */ | |
56dc6a88 | 103 | if (label->cms.disk_offset != 0) { |
1da177e4 LT |
104 | printk("CMS1/%8s(MDSK):", name); |
105 | /* disk is reserved minidisk */ | |
56dc6a88 PO |
106 | blocksize = label->cms.block_size; |
107 | offset = label->cms.disk_offset; | |
108 | size = (label->cms.block_count - 1) * (blocksize >> 9); | |
1da177e4 LT |
109 | } else { |
110 | printk("CMS1/%8s:", name); | |
111 | offset = (info->label_block + 1); | |
90f0094d | 112 | size = i_size >> 9; |
1da177e4 LT |
113 | } |
114 | put_partition(state, 1, offset*(blocksize >> 9), | |
115 | size-offset*(blocksize >> 9)); | |
116 | } else if ((strncmp(type, "VOL1", 4) == 0) && | |
117 | (!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) { | |
118 | /* | |
119 | * New style VOL1 labeled disk | |
120 | */ | |
121 | unsigned int blk; | |
122 | int counter; | |
123 | ||
124 | printk("VOL1/%8s:", name); | |
125 | ||
126 | /* get block number and read then go through format1 labels */ | |
56dc6a88 | 127 | blk = cchhb2blk(&label->vol.vtoc, geo) + 1; |
1da177e4 LT |
128 | counter = 0; |
129 | while ((data = read_dev_sector(bdev, blk*(blocksize/512), | |
130 | §)) != NULL) { | |
4cd5b9f6 | 131 | struct vtoc_format1_label f1; |
1da177e4 | 132 | |
4cd5b9f6 | 133 | memcpy(&f1, data, sizeof(struct vtoc_format1_label)); |
1da177e4 LT |
134 | put_dev_sector(sect); |
135 | ||
136 | /* skip FMT4 / FMT5 / FMT7 labels */ | |
137 | if (f1.DS1FMTID == _ascebc['4'] | |
138 | || f1.DS1FMTID == _ascebc['5'] | |
139 | || f1.DS1FMTID == _ascebc['7']) { | |
140 | blk++; | |
141 | continue; | |
142 | } | |
143 | ||
144 | /* only FMT1 valid at this point */ | |
145 | if (f1.DS1FMTID != _ascebc['1']) | |
146 | break; | |
147 | ||
148 | /* OK, we got valid partition data */ | |
149 | offset = cchh2blk(&f1.DS1EXT1.llimit, geo); | |
ef1597d5 | 150 | size = cchh2blk(&f1.DS1EXT1.ulimit, geo) - |
1da177e4 LT |
151 | offset + geo->sectors; |
152 | if (counter >= state->limit) | |
153 | break; | |
ef1597d5 HH |
154 | put_partition(state, counter + 1, |
155 | offset * (blocksize >> 9), | |
156 | size * (blocksize >> 9)); | |
1da177e4 LT |
157 | counter++; |
158 | blk++; | |
159 | } | |
160 | } else { | |
161 | /* | |
162 | * Old style LNX1 or unlabeled disk | |
163 | */ | |
164 | if (strncmp(type, "LNX1", 4) == 0) | |
165 | printk ("LNX1/%8s:", name); | |
166 | else | |
167 | printk("(nonl)/%8s:", name); | |
168 | offset = (info->label_block + 1); | |
90f0094d | 169 | size = i_size >> 9; |
1da177e4 | 170 | put_partition(state, 1, offset*(blocksize >> 9), |
ef1597d5 | 171 | size-offset*(blocksize >> 9)); |
1da177e4 LT |
172 | } |
173 | ||
174 | printk("\n"); | |
56dc6a88 | 175 | kfree(label); |
1da177e4 LT |
176 | kfree(geo); |
177 | kfree(info); | |
178 | return 1; | |
ef1597d5 | 179 | |
1da177e4 | 180 | out_readerr: |
1da177e4 | 181 | out_noioctl: |
56dc6a88 PO |
182 | kfree(label); |
183 | out_nolab: | |
1da177e4 LT |
184 | kfree(geo); |
185 | out_nogeo: | |
186 | kfree(info); | |
187 | out_noinfo: | |
188 | return 0; | |
189 | } |