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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 | ||
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 | */ | |
b44b0ab3 | 24 | static sector_t |
4cd5b9f6 | 25 | cchh2blk (struct vtoc_cchh *ptr, struct hd_geometry *geo) { |
b44b0ab3 SW |
26 | |
27 | sector_t cyl; | |
28 | __u16 head; | |
29 | ||
30 | /*decode cylinder and heads for large volumes */ | |
31 | cyl = ptr->hh & 0xFFF0; | |
32 | cyl <<= 12; | |
33 | cyl |= ptr->cc; | |
34 | head = ptr->hh & 0x000F; | |
35 | return cyl * geo->heads * geo->sectors + | |
36 | head * geo->sectors; | |
1da177e4 LT |
37 | } |
38 | ||
1da177e4 | 39 | /* |
ef1597d5 | 40 | * compute the block number from a |
1da177e4 LT |
41 | * cyl-cyl-head-head-block structure |
42 | */ | |
b44b0ab3 | 43 | static sector_t |
4cd5b9f6 | 44 | cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) { |
b44b0ab3 SW |
45 | |
46 | sector_t cyl; | |
47 | __u16 head; | |
48 | ||
49 | /*decode cylinder and heads for large volumes */ | |
50 | cyl = ptr->hh & 0xFFF0; | |
51 | cyl <<= 12; | |
52 | cyl |= ptr->cc; | |
53 | head = ptr->hh & 0x000F; | |
54 | return cyl * geo->heads * geo->sectors + | |
55 | head * geo->sectors + | |
1da177e4 LT |
56 | ptr->b; |
57 | } | |
58 | ||
59 | /* | |
60 | */ | |
1493bf21 | 61 | int ibm_partition(struct parsed_partitions *state) |
1da177e4 | 62 | { |
1493bf21 | 63 | struct block_device *bdev = state->bdev; |
b44b0ab3 SW |
64 | int blocksize, res; |
65 | loff_t i_size, offset, size, fmt_size; | |
bf1a95a2 | 66 | dasd_information2_t *info; |
1da177e4 LT |
67 | struct hd_geometry *geo; |
68 | char type[5] = {0,}; | |
69 | char name[7] = {0,}; | |
56dc6a88 | 70 | union label_t { |
b44b0ab3 SW |
71 | struct vtoc_volume_label_cdl vol; |
72 | struct vtoc_volume_label_ldl lnx; | |
56dc6a88 PO |
73 | struct vtoc_cms_label cms; |
74 | } *label; | |
1da177e4 LT |
75 | unsigned char *data; |
76 | Sector sect; | |
77 | ||
57881dd9 | 78 | res = 0; |
e1defc4f | 79 | blocksize = bdev_logical_block_size(bdev); |
90f0094d | 80 | if (blocksize <= 0) |
57881dd9 | 81 | goto out_exit; |
90f0094d HH |
82 | i_size = i_size_read(bdev->bd_inode); |
83 | if (i_size == 0) | |
57881dd9 | 84 | goto out_exit; |
90f0094d | 85 | |
bf1a95a2 SH |
86 | info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL); |
87 | if (info == NULL) | |
57881dd9 | 88 | goto out_exit; |
bf1a95a2 SH |
89 | geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL); |
90 | if (geo == NULL) | |
1da177e4 | 91 | goto out_nogeo; |
bf1a95a2 SH |
92 | label = kmalloc(sizeof(union label_t), GFP_KERNEL); |
93 | if (label == NULL) | |
56dc6a88 | 94 | goto out_nolab; |
ef1597d5 | 95 | |
bf1a95a2 | 96 | if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 || |
1da177e4 | 97 | ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0) |
57881dd9 | 98 | goto out_freeall; |
1da177e4 LT |
99 | |
100 | /* | |
101 | * Get volume label, extract name and type. | |
102 | */ | |
1493bf21 TH |
103 | data = read_part_sector(state, info->label_block*(blocksize/512), |
104 | §); | |
1da177e4 LT |
105 | if (data == NULL) |
106 | goto out_readerr; | |
107 | ||
56dc6a88 | 108 | memcpy(label, data, sizeof(union label_t)); |
1da177e4 LT |
109 | put_dev_sector(sect); |
110 | ||
b44b0ab3 SW |
111 | if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) { |
112 | strncpy(type, label->vol.vollbl, 4); | |
113 | strncpy(name, label->vol.volid, 6); | |
114 | } else { | |
115 | strncpy(type, label->lnx.vollbl, 4); | |
116 | strncpy(name, label->lnx.volid, 6); | |
117 | } | |
1da177e4 LT |
118 | EBCASC(type, 4); |
119 | EBCASC(name, 6); | |
120 | ||
57881dd9 S |
121 | res = 1; |
122 | ||
1da177e4 | 123 | /* |
bf1a95a2 SH |
124 | * Three different formats: LDL, CDL and unformated disk |
125 | * | |
126 | * identified by info->format | |
127 | * | |
128 | * unformated disks we do not have to care about | |
1da177e4 | 129 | */ |
bf1a95a2 SH |
130 | if (info->format == DASD_FORMAT_LDL) { |
131 | if (strncmp(type, "CMS1", 4) == 0) { | |
132 | /* | |
133 | * VM style CMS1 labeled disk | |
134 | */ | |
b44b0ab3 | 135 | blocksize = label->cms.block_size; |
bf1a95a2 SH |
136 | if (label->cms.disk_offset != 0) { |
137 | printk("CMS1/%8s(MDSK):", name); | |
138 | /* disk is reserved minidisk */ | |
bf1a95a2 SH |
139 | offset = label->cms.disk_offset; |
140 | size = (label->cms.block_count - 1) | |
141 | * (blocksize >> 9); | |
142 | } else { | |
143 | printk("CMS1/%8s:", name); | |
144 | offset = (info->label_block + 1); | |
b44b0ab3 SW |
145 | size = label->cms.block_count |
146 | * (blocksize >> 9); | |
bf1a95a2 | 147 | } |
b44b0ab3 SW |
148 | put_partition(state, 1, offset*(blocksize >> 9), |
149 | size-offset*(blocksize >> 9)); | |
1da177e4 | 150 | } else { |
b44b0ab3 SW |
151 | if (strncmp(type, "LNX1", 4) == 0) { |
152 | printk("LNX1/%8s:", name); | |
153 | if (label->lnx.ldl_version == 0xf2) { | |
154 | fmt_size = label->lnx.formatted_blocks | |
155 | * (blocksize >> 9); | |
156 | } else if (!strcmp(info->type, "ECKD")) { | |
157 | /* formated w/o large volume support */ | |
158 | fmt_size = geo->cylinders * geo->heads | |
159 | * geo->sectors * (blocksize >> 9); | |
160 | } else { | |
161 | /* old label and no usable disk geometry | |
162 | * (e.g. DIAG) */ | |
163 | fmt_size = i_size >> 9; | |
164 | } | |
165 | size = i_size >> 9; | |
166 | if (fmt_size < size) | |
167 | size = fmt_size; | |
168 | offset = (info->label_block + 1); | |
169 | } else { | |
170 | /* unlabeled disk */ | |
bf1a95a2 | 171 | printk("(nonl)"); |
b44b0ab3 SW |
172 | size = i_size >> 9; |
173 | offset = (info->label_block + 1); | |
174 | } | |
175 | put_partition(state, 1, offset*(blocksize >> 9), | |
bf1a95a2 | 176 | size-offset*(blocksize >> 9)); |
b44b0ab3 | 177 | } |
bf1a95a2 | 178 | } else if (info->format == DASD_FORMAT_CDL) { |
1da177e4 | 179 | /* |
bf1a95a2 | 180 | * New style CDL formatted disk |
1da177e4 | 181 | */ |
b44b0ab3 | 182 | sector_t blk; |
1da177e4 LT |
183 | int counter; |
184 | ||
1da177e4 | 185 | /* |
bf1a95a2 SH |
186 | * check if VOL1 label is available |
187 | * if not, something is wrong, skipping partition detection | |
1da177e4 | 188 | */ |
bf1a95a2 SH |
189 | if (strncmp(type, "VOL1", 4) == 0) { |
190 | printk("VOL1/%8s:", name); | |
191 | /* | |
192 | * get block number and read then go through format1 | |
193 | * labels | |
194 | */ | |
195 | blk = cchhb2blk(&label->vol.vtoc, geo) + 1; | |
196 | counter = 0; | |
1493bf21 TH |
197 | data = read_part_sector(state, blk * (blocksize/512), |
198 | §); | |
bf1a95a2 SH |
199 | while (data != NULL) { |
200 | struct vtoc_format1_label f1; | |
201 | ||
202 | memcpy(&f1, data, | |
203 | sizeof(struct vtoc_format1_label)); | |
204 | put_dev_sector(sect); | |
205 | ||
206 | /* skip FMT4 / FMT5 / FMT7 labels */ | |
207 | if (f1.DS1FMTID == _ascebc['4'] | |
208 | || f1.DS1FMTID == _ascebc['5'] | |
b44b0ab3 SW |
209 | || f1.DS1FMTID == _ascebc['7'] |
210 | || f1.DS1FMTID == _ascebc['9']) { | |
bf1a95a2 | 211 | blk++; |
1493bf21 TH |
212 | data = read_part_sector(state, |
213 | blk * (blocksize/512), §); | |
bf1a95a2 SH |
214 | continue; |
215 | } | |
216 | ||
b44b0ab3 SW |
217 | /* only FMT1 and 8 labels valid at this point */ |
218 | if (f1.DS1FMTID != _ascebc['1'] && | |
219 | f1.DS1FMTID != _ascebc['8']) | |
bf1a95a2 SH |
220 | break; |
221 | ||
222 | /* OK, we got valid partition data */ | |
223 | offset = cchh2blk(&f1.DS1EXT1.llimit, geo); | |
224 | size = cchh2blk(&f1.DS1EXT1.ulimit, geo) - | |
225 | offset + geo->sectors; | |
226 | if (counter >= state->limit) | |
227 | break; | |
228 | put_partition(state, counter + 1, | |
229 | offset * (blocksize >> 9), | |
230 | size * (blocksize >> 9)); | |
231 | counter++; | |
232 | blk++; | |
1493bf21 TH |
233 | data = read_part_sector(state, |
234 | blk * (blocksize/512), §); | |
bf1a95a2 SH |
235 | } |
236 | ||
237 | if (!data) | |
238 | /* Are we not supposed to report this ? */ | |
239 | goto out_readerr; | |
240 | } else | |
241 | printk(KERN_WARNING "Warning, expected Label VOL1 not " | |
242 | "found, treating as CDL formated Disk"); | |
243 | ||
1da177e4 LT |
244 | } |
245 | ||
246 | printk("\n"); | |
57881dd9 S |
247 | goto out_freeall; |
248 | ||
ef1597d5 | 249 | |
1da177e4 | 250 | out_readerr: |
57881dd9 S |
251 | res = -1; |
252 | out_freeall: | |
56dc6a88 PO |
253 | kfree(label); |
254 | out_nolab: | |
1da177e4 LT |
255 | kfree(geo); |
256 | out_nogeo: | |
257 | kfree(info); | |
57881dd9 S |
258 | out_exit: |
259 | return res; | |
1da177e4 | 260 | } |