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 | { | |
57881dd9 | 46 | int blocksize, offset, size,res; |
90f0094d | 47 | loff_t i_size; |
bf1a95a2 | 48 | dasd_information2_t *info; |
1da177e4 LT |
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 | ||
57881dd9 | 59 | res = 0; |
90f0094d HH |
60 | blocksize = bdev_hardsect_size(bdev); |
61 | if (blocksize <= 0) | |
57881dd9 | 62 | goto out_exit; |
90f0094d HH |
63 | i_size = i_size_read(bdev->bd_inode); |
64 | if (i_size == 0) | |
57881dd9 | 65 | goto out_exit; |
90f0094d | 66 | |
bf1a95a2 SH |
67 | info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL); |
68 | if (info == NULL) | |
57881dd9 | 69 | goto out_exit; |
bf1a95a2 SH |
70 | geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL); |
71 | if (geo == NULL) | |
1da177e4 | 72 | goto out_nogeo; |
bf1a95a2 SH |
73 | label = kmalloc(sizeof(union label_t), GFP_KERNEL); |
74 | if (label == NULL) | |
56dc6a88 | 75 | goto out_nolab; |
ef1597d5 | 76 | |
bf1a95a2 | 77 | if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 || |
1da177e4 | 78 | ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0) |
57881dd9 | 79 | goto out_freeall; |
1da177e4 LT |
80 | |
81 | /* | |
82 | * Get volume label, extract name and type. | |
83 | */ | |
84 | data = read_dev_sector(bdev, info->label_block*(blocksize/512), §); | |
85 | if (data == NULL) | |
86 | goto out_readerr; | |
87 | ||
88 | strncpy (type, data, 4); | |
89 | if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) | |
90 | strncpy(name, data + 8, 6); | |
91 | else | |
92 | strncpy(name, data + 4, 6); | |
56dc6a88 | 93 | memcpy(label, data, sizeof(union label_t)); |
1da177e4 LT |
94 | put_dev_sector(sect); |
95 | ||
96 | EBCASC(type, 4); | |
97 | EBCASC(name, 6); | |
98 | ||
57881dd9 S |
99 | res = 1; |
100 | ||
1da177e4 | 101 | /* |
bf1a95a2 SH |
102 | * Three different formats: LDL, CDL and unformated disk |
103 | * | |
104 | * identified by info->format | |
105 | * | |
106 | * unformated disks we do not have to care about | |
1da177e4 | 107 | */ |
bf1a95a2 SH |
108 | if (info->format == DASD_FORMAT_LDL) { |
109 | if (strncmp(type, "CMS1", 4) == 0) { | |
110 | /* | |
111 | * VM style CMS1 labeled disk | |
112 | */ | |
113 | if (label->cms.disk_offset != 0) { | |
114 | printk("CMS1/%8s(MDSK):", name); | |
115 | /* disk is reserved minidisk */ | |
116 | blocksize = label->cms.block_size; | |
117 | offset = label->cms.disk_offset; | |
118 | size = (label->cms.block_count - 1) | |
119 | * (blocksize >> 9); | |
120 | } else { | |
121 | printk("CMS1/%8s:", name); | |
122 | offset = (info->label_block + 1); | |
123 | size = i_size >> 9; | |
124 | } | |
1da177e4 | 125 | } else { |
bf1a95a2 SH |
126 | /* |
127 | * Old style LNX1 or unlabeled disk | |
128 | */ | |
129 | if (strncmp(type, "LNX1", 4) == 0) | |
130 | printk ("LNX1/%8s:", name); | |
131 | else | |
132 | printk("(nonl)"); | |
1da177e4 | 133 | offset = (info->label_block + 1); |
90f0094d | 134 | size = i_size >> 9; |
1da177e4 LT |
135 | } |
136 | put_partition(state, 1, offset*(blocksize >> 9), | |
bf1a95a2 SH |
137 | size-offset*(blocksize >> 9)); |
138 | } else if (info->format == DASD_FORMAT_CDL) { | |
1da177e4 | 139 | /* |
bf1a95a2 | 140 | * New style CDL formatted disk |
1da177e4 LT |
141 | */ |
142 | unsigned int blk; | |
143 | int counter; | |
144 | ||
1da177e4 | 145 | /* |
bf1a95a2 SH |
146 | * check if VOL1 label is available |
147 | * if not, something is wrong, skipping partition detection | |
1da177e4 | 148 | */ |
bf1a95a2 SH |
149 | if (strncmp(type, "VOL1", 4) == 0) { |
150 | printk("VOL1/%8s:", name); | |
151 | /* | |
152 | * get block number and read then go through format1 | |
153 | * labels | |
154 | */ | |
155 | blk = cchhb2blk(&label->vol.vtoc, geo) + 1; | |
156 | counter = 0; | |
157 | data = read_dev_sector(bdev, blk * (blocksize/512), | |
158 | §); | |
159 | while (data != NULL) { | |
160 | struct vtoc_format1_label f1; | |
161 | ||
162 | memcpy(&f1, data, | |
163 | sizeof(struct vtoc_format1_label)); | |
164 | put_dev_sector(sect); | |
165 | ||
166 | /* skip FMT4 / FMT5 / FMT7 labels */ | |
167 | if (f1.DS1FMTID == _ascebc['4'] | |
168 | || f1.DS1FMTID == _ascebc['5'] | |
169 | || f1.DS1FMTID == _ascebc['7']) { | |
170 | blk++; | |
171 | data = read_dev_sector(bdev, blk * | |
172 | (blocksize/512), | |
173 | §); | |
174 | continue; | |
175 | } | |
176 | ||
177 | /* only FMT1 valid at this point */ | |
178 | if (f1.DS1FMTID != _ascebc['1']) | |
179 | break; | |
180 | ||
181 | /* OK, we got valid partition data */ | |
182 | offset = cchh2blk(&f1.DS1EXT1.llimit, geo); | |
183 | size = cchh2blk(&f1.DS1EXT1.ulimit, geo) - | |
184 | offset + geo->sectors; | |
185 | if (counter >= state->limit) | |
186 | break; | |
187 | put_partition(state, counter + 1, | |
188 | offset * (blocksize >> 9), | |
189 | size * (blocksize >> 9)); | |
190 | counter++; | |
191 | blk++; | |
192 | data = read_dev_sector(bdev, | |
193 | blk * (blocksize/512), | |
194 | §); | |
195 | } | |
196 | ||
197 | if (!data) | |
198 | /* Are we not supposed to report this ? */ | |
199 | goto out_readerr; | |
200 | } else | |
201 | printk(KERN_WARNING "Warning, expected Label VOL1 not " | |
202 | "found, treating as CDL formated Disk"); | |
203 | ||
1da177e4 LT |
204 | } |
205 | ||
206 | printk("\n"); | |
57881dd9 S |
207 | goto out_freeall; |
208 | ||
ef1597d5 | 209 | |
1da177e4 | 210 | out_readerr: |
57881dd9 S |
211 | res = -1; |
212 | out_freeall: | |
56dc6a88 PO |
213 | kfree(label); |
214 | out_nolab: | |
1da177e4 LT |
215 | kfree(geo); |
216 | out_nogeo: | |
217 | kfree(info); | |
57881dd9 S |
218 | out_exit: |
219 | return res; | |
1da177e4 | 220 | } |