4 * IBM DASD partition table handling.
6 * Mostly taken from drivers/s390/block/dasd.c
8 * Copyright (c) 2005, Hannes Reinecke, SUSE Linux Products GmbH
9 * Copyright IBM Corporation, 2009
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 } __attribute__ ((packed)) ttr_t;
39 } __attribute__ ((packed)) cchhb_t;
45 } __attribute__ ((packed)) cchh_t;
47 typedef struct labeldate
51 } __attribute__ ((packed)) labeldate_t;
54 typedef struct volume_label
56 char volkey[4]; /* volume key = volume label */
57 char vollbl[4]; /* volume label */
58 char volid[6]; /* volume identifier */
59 uint8_t security; /* security byte */
60 cchhb_t vtoc; /* VTOC address */
61 char res1[5]; /* reserved */
62 char cisize[4]; /* CI-size for FBA,... */
63 /* ...blanks for CKD */
64 char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */
65 char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */
66 char res2[4]; /* reserved */
67 char lvtoc[14]; /* owner code for LVTOC */
68 char res3[28]; /* reserved */
69 uint8_t ldl_version; /* version number, valid for ldl format */
70 uint64_t formatted_blocks; /* valid when ldl_version >= f2 */
71 } __attribute__ ((packed, aligned(__alignof__(int)))) volume_label_t;
76 uint8_t typeind; /* extent type indicator */
77 uint8_t seqno; /* extent sequence number */
78 cchh_t llimit; /* starting point of this extent */
79 cchh_t ulimit; /* ending point of this extent */
80 } __attribute__ ((packed)) extent_t;
83 typedef struct dev_const
85 uint16_t DS4DSCYL; /* number of logical cyls */
86 uint16_t DS4DSTRK; /* number of tracks in a logical cylinder */
87 uint16_t DS4DEVTK; /* device track length */
88 uint8_t DS4DEVI; /* non-last keyed record overhead */
89 uint8_t DS4DEVL; /* last keyed record overhead */
90 uint8_t DS4DEVK; /* non-keyed record overhead differential */
91 uint8_t DS4DEVFG; /* flag byte */
92 uint16_t DS4DEVTL; /* device tolerance */
93 uint8_t DS4DEVDT; /* number of DSCB's per track */
94 uint8_t DS4DEVDB; /* number of directory blocks per track */
95 } __attribute__ ((packed)) dev_const_t;
98 typedef struct format1_label
100 char DS1DSNAM[44]; /* data set name */
101 uint8_t DS1FMTID; /* format identifier */
102 char DS1DSSN[6]; /* data set serial number */
103 uint16_t DS1VOLSQ; /* volume sequence number */
104 labeldate_t DS1CREDT; /* creation date: ydd */
105 labeldate_t DS1EXPDT; /* expiration date */
106 uint8_t DS1NOEPV; /* number of extents on volume */
107 uint8_t DS1NOBDB; /* no. of bytes used in last direction blk */
108 uint8_t DS1FLAG1; /* flag 1 */
109 char DS1SYSCD[13]; /* system code */
110 labeldate_t DS1REFD; /* date last referenced */
111 uint8_t DS1SMSFG; /* system managed storage indicators */
112 uint8_t DS1SCXTF; /* sec. space extension flag byte */
113 uint16_t DS1SCXTV; /* secondary space extension value */
114 uint8_t DS1DSRG1; /* data set organisation byte 1 */
115 uint8_t DS1DSRG2; /* data set organisation byte 2 */
116 uint8_t DS1RECFM; /* record format */
117 uint8_t DS1OPTCD; /* option code */
118 uint16_t DS1BLKL; /* block length */
119 uint16_t DS1LRECL; /* record length */
120 uint8_t DS1KEYL; /* key length */
121 uint16_t DS1RKP; /* relative key position */
122 uint8_t DS1DSIND; /* data set indicators */
123 uint8_t DS1SCAL1; /* secondary allocation flag byte */
124 char DS1SCAL3[3]; /* secondary allocation quantity */
125 ttr_t DS1LSTAR; /* last used track and block on track */
126 uint16_t DS1TRBAL; /* space remaining on last used track */
127 uint16_t res1; /* reserved */
128 extent_t DS1EXT1; /* first extent description */
129 extent_t DS1EXT2; /* second extent description */
130 extent_t DS1EXT3; /* third extent description */
131 cchhb_t DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
132 } __attribute__ ((packed)) format1_label_t;
136 * struct dasd_information_t
137 * represents any data about the data, which is visible to userspace
139 typedef struct dasd_information_t {
140 unsigned int devno; /* S/390 devno */
141 unsigned int real_devno; /* for aliases */
142 unsigned int schid; /* S/390 subchannel identifier */
143 unsigned int cu_type : 16; /* from SenseID */
144 unsigned int cu_model : 8; /* from SenseID */
145 unsigned int dev_type : 16; /* from SenseID */
146 unsigned int dev_model : 8; /* from SenseID */
147 unsigned int open_count;
148 unsigned int req_queue_len;
149 unsigned int chanq_len; /* length of chanq */
150 char type[4]; /* from discipline.name, 'none' for unknown */
151 unsigned int status; /* current device level */
152 unsigned int label_block; /* where to find the VOLSER */
153 unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
154 unsigned int characteristics_size;
155 unsigned int confdata_size;
156 char characteristics[64]; /* from read_device_characteristics */
157 char configuration_data[256]; /* from read_configuration_data */
158 } dasd_information_t;
160 #define DASD_IOCTL_LETTER 'D'
161 #define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
162 #define BLKGETSIZE _IO(0x12,96)
163 #define BLKSSZGET _IO(0x12,104)
164 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* device size in bytes (u64 *arg)*/
165 #define LV_COMPAT_CYL 0xFFFE
168 * Only compile this on S/390. Doesn't make any sense
169 * for other architectures.
172 static unsigned char EBCtoASC[256] =
174 /* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */
175 0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F,
176 /* 0x08 -GE -SPS -RPT VT FF CR SO SI */
177 0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
178 /* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC
180 0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07,
181 /* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB
183 0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
184 /* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC
186 0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B,
187 /* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL
189 0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07,
190 /* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */
191 0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04,
192 /* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */
193 0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A,
194 /* 0x40 SP RSP ä ---- */
195 0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86,
197 0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
199 0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07,
200 /* 0x58 ß ! $ * ) ; */
201 0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA,
202 /* 0x60 - / ---- Ä ---- ---- ---- */
203 0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F,
204 /* 0x68 ---- , % _ > ? */
205 0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
206 /* 0x70 --- ---- ---- ---- ---- ---- ---- */
207 0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
208 /* 0x78 * ` : # @ ' = " */
209 0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
210 /* 0x80 * a b c d e f g */
211 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
212 /* 0x88 h i ---- ---- ---- */
213 0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1,
214 /* 0x90 ° j k l m n o p */
215 0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
216 /* 0x98 q r ---- ---- */
217 0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07,
218 /* 0xA0 ~ s t u v w x */
219 0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
220 /* 0xA8 y z ---- ---- ---- ---- */
221 0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07,
222 /* 0xB0 ^ ---- § ---- */
223 0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC,
224 /* 0xB8 ---- [ ] ---- ---- ---- ---- */
225 0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07,
226 /* 0xC0 { A B C D E F G */
227 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
228 /* 0xC8 H I ---- ö ---- */
229 0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07,
230 /* 0xD0 } J K L M N O P */
231 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
232 /* 0xD8 Q R ---- ü */
233 0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98,
234 /* 0xE0 \ S T U V W X */
235 0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
236 /* 0xE8 Y Z ---- Ö ---- ---- ---- */
237 0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07,
238 /* 0xF0 0 1 2 3 4 5 6 7 */
239 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
240 /* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */
241 0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07
245 vtoc_ebcdic_dec (const char *source, char *target, int l)
249 for (i = 0; i < l; i++)
250 target[i]=(char)EBCtoASC[(unsigned char)(source[i])];
254 * compute the block number from a
255 * cyl-cyl-head-head structure
257 static inline uint64_t
258 cchh2blk (cchh_t *ptr, struct hd_geometry *geo)
263 /*decode cylinder and heads for large volumes */
264 cyl = ptr->hh & 0xFFF0;
267 head = ptr->hh & 0x000F;
268 return cyl * geo->heads * geo->sectors +
273 * compute the block number from a
274 * cyl-cyl-head-head-block structure
276 static inline uint64_t
277 cchhb2blk (cchhb_t *ptr, struct hd_geometry *geo)
282 /*decode cylinder and heads for large volumes */
283 cyl = ptr->hh & 0xFFF0;
286 head = ptr->hh & 0x000F;
287 return cyl * geo->heads * geo->sectors +
288 head * geo->sectors +