1/* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 *
| 1/* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 *
|
9 * $FreeBSD: head/sys/dev/md/md.c 63309 2000-07-17 13:13:04Z sheldonh $
| 9 * $FreeBSD: head/sys/dev/md/md.c 64880 2000-08-20 21:34:39Z phk $
|
10 * 11 */ 12 13#include "opt_mfs.h" /* We have adopted some tasks from MFS */
| 10 * 11 */ 12 13#include "opt_mfs.h" /* We have adopted some tasks from MFS */
|
14#include "opt_md.h" /* We have adopted some tasks from MFS */
| 14#include "opt_md.h" 15#include "opt_devfs.h"
|
15 16#include <sys/param.h> 17#include <sys/systm.h> 18#include <sys/bio.h> 19#include <sys/conf.h> 20#include <sys/devicestat.h> 21#include <sys/disk.h> 22#include <sys/kernel.h> 23#include <sys/malloc.h> 24#include <sys/sysctl.h> 25#include <sys/linker.h>
| 16 17#include <sys/param.h> 18#include <sys/systm.h> 19#include <sys/bio.h> 20#include <sys/conf.h> 21#include <sys/devicestat.h> 22#include <sys/disk.h> 23#include <sys/kernel.h> 24#include <sys/malloc.h> 25#include <sys/sysctl.h> 26#include <sys/linker.h>
|
| 27#include <sys/queue.h>
|
26
| 28
|
| 29#ifdef DEVFS 30#include <sys/eventhandler.h> 31#include <fs/devfs/devfs.h> 32#endif 33
|
27#ifndef MD_NSECT 28#define MD_NSECT (10000 * 2) 29#endif 30 31MALLOC_DEFINE(M_MD, "MD disk", "Memory Disk"); 32MALLOC_DEFINE(M_MDSECT, "MD sectors", "Memory Disk Sectors"); 33 34static int md_debug; 35SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, ""); 36 37#if defined(MFS_ROOT) && !defined(MD_ROOT) 38#define MD_ROOT MFS_ROOT 39#warning "option MFS_ROOT has been superceeded by MD_ROOT" 40#endif 41 42#if defined(MFS_ROOT_SIZE) && !defined(MD_ROOT_SIZE) 43#define MD_ROOT_SIZE MFS_ROOT_SIZE 44#warning "option MFS_ROOT_SIZE has been superceeded by MD_ROOT_SIZE" 45#endif 46 47#if defined(MD_ROOT) && defined(MD_ROOT_SIZE) 48/* Image gets put here: */ 49static u_char mfs_root[MD_ROOT_SIZE*1024] = "MFS Filesystem goes here"; 50static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here"; 51#endif 52 53static int mdrootready; 54
| 34#ifndef MD_NSECT 35#define MD_NSECT (10000 * 2) 36#endif 37 38MALLOC_DEFINE(M_MD, "MD disk", "Memory Disk"); 39MALLOC_DEFINE(M_MDSECT, "MD sectors", "Memory Disk Sectors"); 40 41static int md_debug; 42SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, ""); 43 44#if defined(MFS_ROOT) && !defined(MD_ROOT) 45#define MD_ROOT MFS_ROOT 46#warning "option MFS_ROOT has been superceeded by MD_ROOT" 47#endif 48 49#if defined(MFS_ROOT_SIZE) && !defined(MD_ROOT_SIZE) 50#define MD_ROOT_SIZE MFS_ROOT_SIZE 51#warning "option MFS_ROOT_SIZE has been superceeded by MD_ROOT_SIZE" 52#endif 53 54#if defined(MD_ROOT) && defined(MD_ROOT_SIZE) 55/* Image gets put here: */ 56static u_char mfs_root[MD_ROOT_SIZE*1024] = "MFS Filesystem goes here"; 57static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here"; 58#endif 59 60static int mdrootready; 61
|
55static void mdcreate_malloc(void);
| 62static void mdcreate_malloc(int unit);
|
56 57#define CDEV_MAJOR 95 58#define BDEV_MAJOR 22 59 60static d_strategy_t mdstrategy; 61static d_strategy_t mdstrategy_preload; 62static d_strategy_t mdstrategy_malloc; 63static d_open_t mdopen; 64static d_ioctl_t mdioctl; 65 66static struct cdevsw md_cdevsw = { 67 /* open */ mdopen, 68 /* close */ nullclose, 69 /* read */ physread, 70 /* write */ physwrite, 71 /* ioctl */ mdioctl, 72 /* poll */ nopoll, 73 /* mmap */ nommap, 74 /* strategy */ mdstrategy, 75 /* name */ "md", 76 /* maj */ CDEV_MAJOR, 77 /* dump */ nodump, 78 /* psize */ nopsize, 79 /* flags */ D_DISK | D_CANFREE | D_MEMDISK, 80 /* bmaj */ BDEV_MAJOR 81}; 82 83static struct cdevsw mddisk_cdevsw; 84
| 63 64#define CDEV_MAJOR 95 65#define BDEV_MAJOR 22 66 67static d_strategy_t mdstrategy; 68static d_strategy_t mdstrategy_preload; 69static d_strategy_t mdstrategy_malloc; 70static d_open_t mdopen; 71static d_ioctl_t mdioctl; 72 73static struct cdevsw md_cdevsw = { 74 /* open */ mdopen, 75 /* close */ nullclose, 76 /* read */ physread, 77 /* write */ physwrite, 78 /* ioctl */ mdioctl, 79 /* poll */ nopoll, 80 /* mmap */ nommap, 81 /* strategy */ mdstrategy, 82 /* name */ "md", 83 /* maj */ CDEV_MAJOR, 84 /* dump */ nodump, 85 /* psize */ nopsize, 86 /* flags */ D_DISK | D_CANFREE | D_MEMDISK, 87 /* bmaj */ BDEV_MAJOR 88}; 89 90static struct cdevsw mddisk_cdevsw; 91
|
| 92static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(&md_softc_list); 93
|
85struct md_s { 86 int unit;
| 94struct md_s { 95 int unit;
|
| 96 LIST_ENTRY(md_s) list;
|
87 struct devstat stats; 88 struct bio_queue_head bio_queue; 89 struct disk disk; 90 dev_t dev; 91 int busy; 92 enum {MD_MALLOC, MD_PRELOAD} type; 93 unsigned nsect; 94 95 /* MD_MALLOC related fields */ 96 unsigned nsecp; 97 u_char **secp; 98 99 /* MD_PRELOAD related fields */ 100 u_char *pl_ptr; 101 unsigned pl_len; 102}; 103 104static int mdunits; 105 106static int 107mdopen(dev_t dev, int flag, int fmt, struct proc *p) 108{ 109 struct md_s *sc; 110 struct disklabel *dl; 111 112 if (md_debug) 113 printf("mdopen(%s %x %x %p)\n", 114 devtoname(dev), flag, fmt, p); 115 116 sc = dev->si_drv1;
| 97 struct devstat stats; 98 struct bio_queue_head bio_queue; 99 struct disk disk; 100 dev_t dev; 101 int busy; 102 enum {MD_MALLOC, MD_PRELOAD} type; 103 unsigned nsect; 104 105 /* MD_MALLOC related fields */ 106 unsigned nsecp; 107 u_char **secp; 108 109 /* MD_PRELOAD related fields */ 110 u_char *pl_ptr; 111 unsigned pl_len; 112}; 113 114static int mdunits; 115 116static int 117mdopen(dev_t dev, int flag, int fmt, struct proc *p) 118{ 119 struct md_s *sc; 120 struct disklabel *dl; 121 122 if (md_debug) 123 printf("mdopen(%s %x %x %p)\n", 124 devtoname(dev), flag, fmt, p); 125 126 sc = dev->si_drv1;
|
| 127#ifndef DEVFS
|
117 if (sc->unit + 1 == mdunits)
| 128 if (sc->unit + 1 == mdunits)
|
118 mdcreate_malloc();
| 129 mdcreate_malloc(-1); 130#endif
|
119 120 dl = &sc->disk.d_label; 121 bzero(dl, sizeof(*dl)); 122 dl->d_secsize = DEV_BSIZE; 123 dl->d_nsectors = 1024; 124 dl->d_ntracks = 1; 125 dl->d_secpercyl = dl->d_nsectors * dl->d_ntracks; 126 dl->d_secperunit = sc->nsect; 127 dl->d_ncylinders = dl->d_secperunit / dl->d_secpercyl; 128 return (0); 129} 130 131static int 132mdioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p) 133{ 134 135 if (md_debug) 136 printf("mdioctl(%s %lx %p %x %p)\n", 137 devtoname(dev), cmd, addr, flags, p); 138 139 return (ENOIOCTL); 140} 141 142static void 143mdstrategy(struct bio *bp) 144{ 145 struct md_s *sc; 146 147 if (md_debug > 1) 148 printf("mdstrategy(%p) %s %x, %d, %ld, %p)\n", 149 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 150 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 151 152 sc = bp->bio_dev->si_drv1; 153 if (sc->type == MD_MALLOC) { 154 mdstrategy_malloc(bp); 155 } else { 156 mdstrategy_preload(bp); 157 } 158 return; 159} 160 161 162static void 163mdstrategy_malloc(struct bio *bp) 164{ 165 int s, i; 166 struct md_s *sc; 167 devstat_trans_flags dop; 168 u_char *secp, **secpp, *dst; 169 unsigned secno, nsec, secval, uc; 170 171 if (md_debug > 1) 172 printf("mdstrategy_malloc(%p) %s %x, %d, %ld, %p)\n", 173 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 174 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 175 176 sc = bp->bio_dev->si_drv1; 177 178 s = splbio(); 179 180 bioqdisksort(&sc->bio_queue, bp); 181 182 if (sc->busy) { 183 splx(s); 184 return; 185 } 186 187 sc->busy++; 188 189 while (1) { 190 bp = bioq_first(&sc->bio_queue); 191 if (bp) 192 bioq_remove(&sc->bio_queue, bp); 193 splx(s); 194 if (!bp) 195 break; 196 197 devstat_start_transaction(&sc->stats); 198 199 if (bp->bio_cmd == BIO_DELETE) 200 dop = DEVSTAT_NO_DATA; 201 else if (bp->bio_cmd == BIO_READ) 202 dop = DEVSTAT_READ; 203 else 204 dop = DEVSTAT_WRITE; 205 206 nsec = bp->bio_bcount / DEV_BSIZE; 207 secno = bp->bio_pblkno; 208 dst = bp->bio_data; 209 while (nsec--) { 210 211 if (secno < sc->nsecp) { 212 secpp = &sc->secp[secno]; 213 if ((u_int)*secpp > 255) { 214 secp = *secpp; 215 secval = 0; 216 } else { 217 secp = 0; 218 secval = (u_int) *secpp; 219 } 220 } else { 221 secpp = 0; 222 secp = 0; 223 secval = 0; 224 } 225 if (md_debug > 2) 226 printf("%x %p %p %d\n", 227 bp->bio_flags, secpp, secp, secval); 228 229 if (bp->bio_cmd == BIO_DELETE) { 230 if (secpp) { 231 if (secp) 232 FREE(secp, M_MDSECT); 233 *secpp = 0; 234 } 235 } else if (bp->bio_cmd == BIO_READ) { 236 if (secp) { 237 bcopy(secp, dst, DEV_BSIZE); 238 } else if (secval) { 239 for (i = 0; i < DEV_BSIZE; i++) 240 dst[i] = secval; 241 } else { 242 bzero(dst, DEV_BSIZE); 243 } 244 } else { 245 uc = dst[0]; 246 for (i = 1; i < DEV_BSIZE; i++) 247 if (dst[i] != uc) 248 break; 249 if (i == DEV_BSIZE && !uc) { 250 if (secp) 251 FREE(secp, M_MDSECT); 252 if (secpp) 253 *secpp = (u_char *)uc; 254 } else { 255 if (!secpp) { 256 MALLOC(secpp, u_char **, (secno + nsec + 1) * sizeof(u_char *), M_MD, M_WAITOK); 257 bzero(secpp, (secno + nsec + 1) * sizeof(u_char *)); 258 bcopy(sc->secp, secpp, sc->nsecp * sizeof(u_char *)); 259 FREE(sc->secp, M_MD); 260 sc->secp = secpp; 261 sc->nsecp = secno + nsec + 1; 262 secpp = &sc->secp[secno]; 263 } 264 if (i == DEV_BSIZE) { 265 if (secp) 266 FREE(secp, M_MDSECT); 267 *secpp = (u_char *)uc; 268 } else { 269 if (!secp) 270 MALLOC(secp, u_char *, DEV_BSIZE, M_MDSECT, M_WAITOK); 271 bcopy(dst, secp, DEV_BSIZE); 272 273 *secpp = secp; 274 } 275 } 276 } 277 secno++; 278 dst += DEV_BSIZE; 279 } 280 bp->bio_resid = 0; 281 devstat_end_transaction_bio(&sc->stats, bp); 282 biodone(bp); 283 s = splbio(); 284 } 285 sc->busy = 0; 286 return; 287} 288 289 290static void 291mdstrategy_preload(struct bio *bp) 292{ 293 int s; 294 struct md_s *sc; 295 devstat_trans_flags dop; 296 297 if (md_debug > 1) 298 printf("mdstrategy_preload(%p) %s %x, %d, %ld, %p)\n", 299 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 300 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 301 302 sc = bp->bio_dev->si_drv1; 303 304 s = splbio(); 305 306 bioqdisksort(&sc->bio_queue, bp); 307 308 if (sc->busy) { 309 splx(s); 310 return; 311 } 312 313 sc->busy++; 314 315 while (1) { 316 bp = bioq_first(&sc->bio_queue); 317 if (bp) 318 bioq_remove(&sc->bio_queue, bp); 319 splx(s); 320 if (!bp) 321 break; 322 323 devstat_start_transaction(&sc->stats); 324 325 if (bp->bio_cmd == BIO_DELETE) { 326 dop = DEVSTAT_NO_DATA; 327 } else if (bp->bio_cmd == BIO_READ) { 328 dop = DEVSTAT_READ; 329 bcopy(sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_data, bp->bio_bcount); 330 } else { 331 dop = DEVSTAT_WRITE; 332 bcopy(bp->bio_data, sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_bcount); 333 } 334 bp->bio_resid = 0; 335 devstat_end_transaction_bio(&sc->stats, bp); 336 biodone(bp); 337 s = splbio(); 338 } 339 sc->busy = 0; 340 return; 341} 342 343static struct md_s *
| 131 132 dl = &sc->disk.d_label; 133 bzero(dl, sizeof(*dl)); 134 dl->d_secsize = DEV_BSIZE; 135 dl->d_nsectors = 1024; 136 dl->d_ntracks = 1; 137 dl->d_secpercyl = dl->d_nsectors * dl->d_ntracks; 138 dl->d_secperunit = sc->nsect; 139 dl->d_ncylinders = dl->d_secperunit / dl->d_secpercyl; 140 return (0); 141} 142 143static int 144mdioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p) 145{ 146 147 if (md_debug) 148 printf("mdioctl(%s %lx %p %x %p)\n", 149 devtoname(dev), cmd, addr, flags, p); 150 151 return (ENOIOCTL); 152} 153 154static void 155mdstrategy(struct bio *bp) 156{ 157 struct md_s *sc; 158 159 if (md_debug > 1) 160 printf("mdstrategy(%p) %s %x, %d, %ld, %p)\n", 161 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 162 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 163 164 sc = bp->bio_dev->si_drv1; 165 if (sc->type == MD_MALLOC) { 166 mdstrategy_malloc(bp); 167 } else { 168 mdstrategy_preload(bp); 169 } 170 return; 171} 172 173 174static void 175mdstrategy_malloc(struct bio *bp) 176{ 177 int s, i; 178 struct md_s *sc; 179 devstat_trans_flags dop; 180 u_char *secp, **secpp, *dst; 181 unsigned secno, nsec, secval, uc; 182 183 if (md_debug > 1) 184 printf("mdstrategy_malloc(%p) %s %x, %d, %ld, %p)\n", 185 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 186 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 187 188 sc = bp->bio_dev->si_drv1; 189 190 s = splbio(); 191 192 bioqdisksort(&sc->bio_queue, bp); 193 194 if (sc->busy) { 195 splx(s); 196 return; 197 } 198 199 sc->busy++; 200 201 while (1) { 202 bp = bioq_first(&sc->bio_queue); 203 if (bp) 204 bioq_remove(&sc->bio_queue, bp); 205 splx(s); 206 if (!bp) 207 break; 208 209 devstat_start_transaction(&sc->stats); 210 211 if (bp->bio_cmd == BIO_DELETE) 212 dop = DEVSTAT_NO_DATA; 213 else if (bp->bio_cmd == BIO_READ) 214 dop = DEVSTAT_READ; 215 else 216 dop = DEVSTAT_WRITE; 217 218 nsec = bp->bio_bcount / DEV_BSIZE; 219 secno = bp->bio_pblkno; 220 dst = bp->bio_data; 221 while (nsec--) { 222 223 if (secno < sc->nsecp) { 224 secpp = &sc->secp[secno]; 225 if ((u_int)*secpp > 255) { 226 secp = *secpp; 227 secval = 0; 228 } else { 229 secp = 0; 230 secval = (u_int) *secpp; 231 } 232 } else { 233 secpp = 0; 234 secp = 0; 235 secval = 0; 236 } 237 if (md_debug > 2) 238 printf("%x %p %p %d\n", 239 bp->bio_flags, secpp, secp, secval); 240 241 if (bp->bio_cmd == BIO_DELETE) { 242 if (secpp) { 243 if (secp) 244 FREE(secp, M_MDSECT); 245 *secpp = 0; 246 } 247 } else if (bp->bio_cmd == BIO_READ) { 248 if (secp) { 249 bcopy(secp, dst, DEV_BSIZE); 250 } else if (secval) { 251 for (i = 0; i < DEV_BSIZE; i++) 252 dst[i] = secval; 253 } else { 254 bzero(dst, DEV_BSIZE); 255 } 256 } else { 257 uc = dst[0]; 258 for (i = 1; i < DEV_BSIZE; i++) 259 if (dst[i] != uc) 260 break; 261 if (i == DEV_BSIZE && !uc) { 262 if (secp) 263 FREE(secp, M_MDSECT); 264 if (secpp) 265 *secpp = (u_char *)uc; 266 } else { 267 if (!secpp) { 268 MALLOC(secpp, u_char **, (secno + nsec + 1) * sizeof(u_char *), M_MD, M_WAITOK); 269 bzero(secpp, (secno + nsec + 1) * sizeof(u_char *)); 270 bcopy(sc->secp, secpp, sc->nsecp * sizeof(u_char *)); 271 FREE(sc->secp, M_MD); 272 sc->secp = secpp; 273 sc->nsecp = secno + nsec + 1; 274 secpp = &sc->secp[secno]; 275 } 276 if (i == DEV_BSIZE) { 277 if (secp) 278 FREE(secp, M_MDSECT); 279 *secpp = (u_char *)uc; 280 } else { 281 if (!secp) 282 MALLOC(secp, u_char *, DEV_BSIZE, M_MDSECT, M_WAITOK); 283 bcopy(dst, secp, DEV_BSIZE); 284 285 *secpp = secp; 286 } 287 } 288 } 289 secno++; 290 dst += DEV_BSIZE; 291 } 292 bp->bio_resid = 0; 293 devstat_end_transaction_bio(&sc->stats, bp); 294 biodone(bp); 295 s = splbio(); 296 } 297 sc->busy = 0; 298 return; 299} 300 301 302static void 303mdstrategy_preload(struct bio *bp) 304{ 305 int s; 306 struct md_s *sc; 307 devstat_trans_flags dop; 308 309 if (md_debug > 1) 310 printf("mdstrategy_preload(%p) %s %x, %d, %ld, %p)\n", 311 bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno, 312 bp->bio_bcount / DEV_BSIZE, bp->bio_data); 313 314 sc = bp->bio_dev->si_drv1; 315 316 s = splbio(); 317 318 bioqdisksort(&sc->bio_queue, bp); 319 320 if (sc->busy) { 321 splx(s); 322 return; 323 } 324 325 sc->busy++; 326 327 while (1) { 328 bp = bioq_first(&sc->bio_queue); 329 if (bp) 330 bioq_remove(&sc->bio_queue, bp); 331 splx(s); 332 if (!bp) 333 break; 334 335 devstat_start_transaction(&sc->stats); 336 337 if (bp->bio_cmd == BIO_DELETE) { 338 dop = DEVSTAT_NO_DATA; 339 } else if (bp->bio_cmd == BIO_READ) { 340 dop = DEVSTAT_READ; 341 bcopy(sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_data, bp->bio_bcount); 342 } else { 343 dop = DEVSTAT_WRITE; 344 bcopy(bp->bio_data, sc->pl_ptr + (bp->bio_pblkno << DEV_BSHIFT), bp->bio_bcount); 345 } 346 bp->bio_resid = 0; 347 devstat_end_transaction_bio(&sc->stats, bp); 348 biodone(bp); 349 s = splbio(); 350 } 351 sc->busy = 0; 352 return; 353} 354 355static struct md_s *
|
344mdcreate(void)
| 356mdcreate(int unit)
|
345{ 346 struct md_s *sc; 347
| 357{ 358 struct md_s *sc; 359
|
| 360 if (unit == -1) 361 unit = mdunits++; 362 /* Make sure this unit isn't already in action */ 363 LIST_FOREACH(sc, &md_softc_list, list) { 364 if (sc->unit == unit) 365 return (NULL); 366 }
|
348 MALLOC(sc, struct md_s *,sizeof(*sc), M_MD, M_WAITOK); 349 bzero(sc, sizeof(*sc));
| 367 MALLOC(sc, struct md_s *,sizeof(*sc), M_MD, M_WAITOK); 368 bzero(sc, sizeof(*sc));
|
350 sc->unit = mdunits++;
| 369 LIST_INSERT_HEAD(&md_softc_list, sc, list); 370 sc->unit = unit;
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351 bioq_init(&sc->bio_queue); 352 devstat_add_entry(&sc->stats, "md", sc->unit, DEV_BSIZE, 353 DEVSTAT_NO_ORDERED_TAGS, 354 DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, 355 DEVSTAT_PRIORITY_OTHER); 356 sc->dev = disk_create(sc->unit, &sc->disk, 0, &md_cdevsw, &mddisk_cdevsw); 357 sc->dev->si_drv1 = sc; 358 return (sc); 359} 360 361static void 362mdcreate_preload(u_char *image, unsigned length) 363{ 364 struct md_s *sc; 365
| 371 bioq_init(&sc->bio_queue); 372 devstat_add_entry(&sc->stats, "md", sc->unit, DEV_BSIZE, 373 DEVSTAT_NO_ORDERED_TAGS, 374 DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, 375 DEVSTAT_PRIORITY_OTHER); 376 sc->dev = disk_create(sc->unit, &sc->disk, 0, &md_cdevsw, &mddisk_cdevsw); 377 sc->dev->si_drv1 = sc; 378 return (sc); 379} 380 381static void 382mdcreate_preload(u_char *image, unsigned length) 383{ 384 struct md_s *sc; 385
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366 sc = mdcreate();
| 386 sc = mdcreate(-1);
|
367 sc->type = MD_PRELOAD; 368 sc->nsect = length / DEV_BSIZE; 369 sc->pl_ptr = image; 370 sc->pl_len = length; 371 372 if (sc->unit == 0) 373 mdrootready = 1; 374} 375 376static void
| 387 sc->type = MD_PRELOAD; 388 sc->nsect = length / DEV_BSIZE; 389 sc->pl_ptr = image; 390 sc->pl_len = length; 391 392 if (sc->unit == 0) 393 mdrootready = 1; 394} 395 396static void
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377mdcreate_malloc(void)
| 397mdcreate_malloc(int unit)
|
378{ 379 struct md_s *sc; 380
| 398{ 399 struct md_s *sc; 400
|
381 sc = mdcreate();
| 401 sc = mdcreate(unit); 402 if (sc == NULL) 403 return; 404
|
382 sc->type = MD_MALLOC; 383 384 sc->nsect = MD_NSECT; /* for now */ 385 MALLOC(sc->secp, u_char **, sizeof(u_char *), M_MD, M_WAITOK); 386 bzero(sc->secp, sizeof(u_char *)); 387 sc->nsecp = 1; 388 printf("md%d: Malloc disk\n", sc->unit); 389} 390
| 405 sc->type = MD_MALLOC; 406 407 sc->nsect = MD_NSECT; /* for now */ 408 MALLOC(sc->secp, u_char **, sizeof(u_char *), M_MD, M_WAITOK); 409 bzero(sc->secp, sizeof(u_char *)); 410 sc->nsecp = 1; 411 printf("md%d: Malloc disk\n", sc->unit); 412} 413
|
| 414#ifdef DEVFS
|
391static void
| 415static void
|
| 416md_clone (void *arg, char *name, int namelen, dev_t *dev) 417{ 418 int i, u; 419 420 if (*dev != NODEV) 421 return; 422 i = devfs_stdclone(name, NULL, "md", &u); 423 if (i == 0) 424 return; 425 /* XXX: should check that next char is [\0sa-h] */ 426 /* 427 * Now we cheat: We just create the disk, but don't match. 428 * Since we run before it, subr_disk.c::disk_clone() will 429 * find our disk and match the sought for device. 430 */ 431 mdcreate_malloc(u); 432 return; 433} 434#endif 435 436static void
|
392md_drvinit(void *unused) 393{ 394 395 caddr_t mod; 396 caddr_t c; 397 u_char *ptr, *name, *type; 398 unsigned len; 399 400#ifdef MD_ROOT_SIZE 401 mdcreate_preload(mfs_root, MD_ROOT_SIZE*1024); 402#endif 403 mod = NULL; 404 while ((mod = preload_search_next_name(mod)) != NULL) { 405 name = (char *)preload_search_info(mod, MODINFO_NAME); 406 type = (char *)preload_search_info(mod, MODINFO_TYPE); 407 if (name == NULL) 408 continue; 409 if (type == NULL) 410 continue; 411 if (strcmp(type, "md_image") && strcmp(type, "mfs_root")) 412 continue; 413 c = preload_search_info(mod, MODINFO_ADDR); 414 ptr = *(u_char **)c; 415 c = preload_search_info(mod, MODINFO_SIZE); 416 len = *(unsigned *)c; 417 printf("md%d: Preloaded image <%s> %d bytes at %p\n", 418 mdunits, name, len, ptr); 419 mdcreate_preload(ptr, len); 420 }
| 437md_drvinit(void *unused) 438{ 439 440 caddr_t mod; 441 caddr_t c; 442 u_char *ptr, *name, *type; 443 unsigned len; 444 445#ifdef MD_ROOT_SIZE 446 mdcreate_preload(mfs_root, MD_ROOT_SIZE*1024); 447#endif 448 mod = NULL; 449 while ((mod = preload_search_next_name(mod)) != NULL) { 450 name = (char *)preload_search_info(mod, MODINFO_NAME); 451 type = (char *)preload_search_info(mod, MODINFO_TYPE); 452 if (name == NULL) 453 continue; 454 if (type == NULL) 455 continue; 456 if (strcmp(type, "md_image") && strcmp(type, "mfs_root")) 457 continue; 458 c = preload_search_info(mod, MODINFO_ADDR); 459 ptr = *(u_char **)c; 460 c = preload_search_info(mod, MODINFO_SIZE); 461 len = *(unsigned *)c; 462 printf("md%d: Preloaded image <%s> %d bytes at %p\n", 463 mdunits, name, len, ptr); 464 mdcreate_preload(ptr, len); 465 }
|
421 mdcreate_malloc();
| 466#ifdef DEVFS 467 EVENTHANDLER_REGISTER(devfs_clone, md_clone, 0, 999); 468#else 469 mdcreate_malloc(-1); 470#endif
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422} 423 424SYSINIT(mddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR, md_drvinit,NULL) 425 426#ifdef MD_ROOT 427static void 428md_takeroot(void *junk) 429{ 430 if (mdrootready) 431 rootdevnames[0] = "ufs:/dev/md0c"; 432} 433 434SYSINIT(md_root, SI_SUB_MOUNT_ROOT, SI_ORDER_FIRST, md_takeroot, NULL); 435#endif
| 471} 472 473SYSINIT(mddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR, md_drvinit,NULL) 474 475#ifdef MD_ROOT 476static void 477md_takeroot(void *junk) 478{ 479 if (mdrootready) 480 rootdevnames[0] = "ufs:/dev/md0c"; 481} 482 483SYSINIT(md_root, SI_SUB_MOUNT_ROOT, SI_ORDER_FIRST, md_takeroot, NULL); 484#endif
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