| 1 | /* |
| 2 | * Written by Paul Popelka (paulp@uts.amdahl.com) |
| 3 | * |
| 4 | * You can do anything you want with this software, |
| 5 | * just don't say you wrote it, |
| 6 | * and don't remove this notice. |
| 7 | * |
| 8 | * This software is provided "as is". |
| 9 | * |
| 10 | * The author supplies this software to be publicly |
| 11 | * redistributed on the understanding that the author |
| 12 | * is not responsible for the correct functioning of |
| 13 | * this software in any circumstances and is not liable |
| 14 | * for any damages caused by this software. |
| 15 | * |
| 16 | * October 1992 |
| 17 | * |
| 18 | * $Header: /usr/src/CVS/sys/pcfs/pcfs_vfsops.c,v 1.1.2.1 1993/02/07 21:57:25 friedl Exp $ |
| 19 | * |
| 20 | * April 6, 1992 |
| 21 | * |
| 22 | * Changed MOUNT_PCFS to MOUNT_MSDOS, this whole package should be renamed |
| 23 | * to msdosfs, but I did not have the time to do it. Some one please do |
| 24 | * this and resubmit it to the patchkit! |
| 25 | * Rodney W. Grimes |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include "param.h" |
| 30 | #include "systm.h" |
| 31 | #include "namei.h" |
| 32 | #include "proc.h" |
| 33 | #include "kernel.h" |
| 34 | #include "vnode.h" |
| 35 | #include "specdev.h" /* defines v_rdev */ |
| 36 | #include "mount.h" |
| 37 | #include "buf.h" |
| 38 | #include "file.h" |
| 39 | #include "malloc.h" |
| 40 | |
| 41 | #include "bpb.h" |
| 42 | #include "bootsect.h" |
| 43 | #include "direntry.h" |
| 44 | #include "denode.h" |
| 45 | #include "pcfsmount.h" |
| 46 | #include "fat.h" |
| 47 | |
| 48 | int pcfsdoforce = 0; /* 1 = force unmount */ |
| 49 | |
| 50 | /* |
| 51 | * mp - |
| 52 | * path - addr in user space of mount point (ie /usr or whatever) |
| 53 | * data - addr in user space of mount params including the |
| 54 | * name of the block special file to treat as a filesystem. |
| 55 | * ndp - |
| 56 | * p - |
| 57 | */ |
| 58 | int |
| 59 | pcfs_mount(mp, path, data, ndp, p) |
| 60 | struct mount *mp; |
| 61 | char *path; |
| 62 | caddr_t data; |
| 63 | struct nameidata *ndp; |
| 64 | struct proc *p; |
| 65 | { |
| 66 | struct vnode *devvp; /* vnode for blk device to mount */ |
| 67 | struct pcfs_args args; /* will hold data from mount request */ |
| 68 | struct pcfsmount *pmp; /* pcfs specific mount control block */ |
| 69 | int error; |
| 70 | u_int size; |
| 71 | |
| 72 | /* |
| 73 | * Copy in the args for the mount request. |
| 74 | */ |
| 75 | if (error = copyin(data, (caddr_t)&args, sizeof(struct pcfs_args))) |
| 76 | return error; |
| 77 | |
| 78 | /* |
| 79 | * Check to see if they want it to be an exportable |
| 80 | * filesystem via nfs. And, if they do, should it |
| 81 | * be read only, and what uid is root to be mapped |
| 82 | * to. |
| 83 | */ |
| 84 | if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) { |
| 85 | if (args.exflags & MNT_EXPORTED) |
| 86 | mp->mnt_flag |= MNT_EXPORTED; |
| 87 | else |
| 88 | mp->mnt_flag &= ~MNT_EXPORTED; |
| 89 | if (args.exflags & MNT_EXRDONLY) |
| 90 | mp->mnt_flag |= MNT_EXRDONLY; |
| 91 | else |
| 92 | mp->mnt_flag &= ~MNT_EXRDONLY; |
| 93 | mp->mnt_exroot = args.exroot; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * If they just want to update then be sure we can |
| 98 | * do what is asked. Can't change a filesystem from |
| 99 | * read/write to read only. Why? |
| 100 | * And if they've supplied a new device file name then we |
| 101 | * continue, otherwise return. |
| 102 | */ |
| 103 | if (mp->mnt_flag & MNT_UPDATE) { |
| 104 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 105 | if (pmp->pm_ronly && (mp->mnt_flag & MNT_RDONLY) == 0) |
| 106 | pmp->pm_ronly = 0; |
| 107 | if (args.fspec == 0) |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * Now, lookup the name of the block device this |
| 113 | * mount or name update request is to apply to. |
| 114 | */ |
| 115 | ndp->ni_nameiop = LOOKUP | FOLLOW; |
| 116 | ndp->ni_segflg = UIO_USERSPACE; |
| 117 | ndp->ni_dirp = args.fspec; |
| 118 | if (error = namei(ndp, p)) |
| 119 | return error; |
| 120 | |
| 121 | /* |
| 122 | * Be sure they've given us a block device to treat |
| 123 | * as a filesystem. And, that its major number is |
| 124 | * within the bdevsw table. |
| 125 | */ |
| 126 | devvp = ndp->ni_vp; |
| 127 | if (devvp->v_type != VBLK) { |
| 128 | vrele(devvp); /* namei() acquires this? */ |
| 129 | return ENOTBLK; |
| 130 | } |
| 131 | if (major(devvp->v_rdev) >= nblkdev) { |
| 132 | vrele(devvp); |
| 133 | return ENXIO; |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * If this is an update, then make sure the vnode |
| 138 | * for the block special device is the same as the |
| 139 | * one our filesystem is in. |
| 140 | */ |
| 141 | if (mp->mnt_flag & MNT_UPDATE) { |
| 142 | if (devvp != pmp->pm_devvp) |
| 143 | error = EINVAL; |
| 144 | else |
| 145 | vrele(devvp); |
| 146 | } else { |
| 147 | |
| 148 | /* |
| 149 | * Well, it's not an update, it's a real mount request. |
| 150 | * Time to get dirty. |
| 151 | */ |
| 152 | error = mountpcfs(devvp, mp, p); |
| 153 | } |
| 154 | if (error) { |
| 155 | vrele(devvp); |
| 156 | return error; |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Copy in the name of the directory the filesystem |
| 161 | * is to be mounted on. |
| 162 | * Then copy in the name of the block special file |
| 163 | * representing the filesystem being mounted. |
| 164 | * And we clear the remainder of the character strings |
| 165 | * to be tidy. |
| 166 | * Then, we try to fill in the filesystem stats structure |
| 167 | * as best we can with whatever applies from a dos file |
| 168 | * system. |
| 169 | */ |
| 170 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 171 | copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, |
| 172 | sizeof(mp->mnt_stat.f_mntonname)-1, &size); |
| 173 | bzero(mp->mnt_stat.f_mntonname + size, |
| 174 | sizeof(mp->mnt_stat.f_mntonname) - size); |
| 175 | copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN-1, &size); |
| 176 | bzero(mp->mnt_stat.f_mntfromname + size, |
| 177 | MNAMELEN - size); |
| 178 | (void)pcfs_statfs(mp, &mp->mnt_stat, p); |
| 179 | #if defined(PCFSDEBUG) |
| 180 | printf("pcfs_mount(): mp %x, pmp %x, inusemap %x\n", mp, pmp, pmp->pm_inusemap); |
| 181 | #endif /* defined(PCFSDEBUG) */ |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | int |
| 186 | mountpcfs(devvp, mp, p) |
| 187 | struct vnode *devvp; |
| 188 | struct mount *mp; |
| 189 | struct proc *p; |
| 190 | { |
| 191 | int i; |
| 192 | int bpc; |
| 193 | int bit; |
| 194 | int error = 0; |
| 195 | int needclose; |
| 196 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 197 | dev_t dev = devvp->v_rdev; |
| 198 | union bootsector *bsp; |
| 199 | struct pcfsmount *pmp; |
| 200 | struct buf *bp0 = NULL; |
| 201 | struct byte_bpb33 *b33; |
| 202 | struct byte_bpb50 *b50; |
| 203 | |
| 204 | /* |
| 205 | * Multiple mounts of the same block special file |
| 206 | * aren't allowed. Make sure no one else has the |
| 207 | * special file open. And flush any old buffers |
| 208 | * from this filesystem. Presumably this prevents |
| 209 | * us from running into buffers that are the wrong |
| 210 | * blocksize. |
| 211 | * NOTE: mountedon() is a part of the ufs filesystem. |
| 212 | * If the ufs filesystem is not gen'ed into the system |
| 213 | * we will get an unresolved reference. |
| 214 | */ |
| 215 | if (error = mountedon(devvp)) { |
| 216 | return error; |
| 217 | } |
| 218 | if (vcount(devvp) > 1) |
| 219 | return EBUSY; |
| 220 | vinvalbuf(devvp, 1); |
| 221 | |
| 222 | /* |
| 223 | * Now open the block special file. |
| 224 | */ |
| 225 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p)) |
| 226 | return error; |
| 227 | needclose = 1; |
| 228 | #if defined(HDSUPPORT) |
| 229 | /* |
| 230 | * Put this in when we support reading dos filesystems |
| 231 | * from partitioned harddisks. |
| 232 | */ |
| 233 | if (VOP_IOCTL(devvp, DIOCGPART, &pcfspart, FREAD, NOCRED, p) == 0) { |
| 234 | } |
| 235 | #endif /* defined(HDSUPPORT) */ |
| 236 | |
| 237 | /* |
| 238 | * Read the boot sector of the filesystem, and then |
| 239 | * check the boot signature. If not a dos boot sector |
| 240 | * then error out. We could also add some checking on |
| 241 | * the bsOemName field. So far I've seen the following |
| 242 | * values: |
| 243 | * "IBM 3.3" |
| 244 | * "MSDOS3.3" |
| 245 | * "MSDOS5.0" |
| 246 | */ |
| 247 | if (error = bread(devvp, 0, 512, NOCRED, &bp0)) |
| 248 | goto error_exit; |
| 249 | bp0->b_flags |= B_AGE; |
| 250 | bsp = (union bootsector *)bp0->b_un.b_addr; |
| 251 | b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB; |
| 252 | b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB; |
| 253 | if (bsp->bs50.bsBootSectSig != BOOTSIG) { |
| 254 | error = EINVAL; |
| 255 | goto error_exit; |
| 256 | } |
| 257 | |
| 258 | pmp = malloc(sizeof *pmp, M_PCFSMNT, M_WAITOK); |
| 259 | pmp->pm_inusemap = NULL; |
| 260 | pmp->pm_mountp = mp; |
| 261 | |
| 262 | /* |
| 263 | * Compute several useful quantities from the bpb in |
| 264 | * the bootsector. Copy in the dos 5 variant of the |
| 265 | * bpb then fix up the fields that are different between |
| 266 | * dos 5 and dos 3.3. |
| 267 | */ |
| 268 | pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec); |
| 269 | pmp->pm_SectPerClust = b50->bpbSecPerClust; |
| 270 | pmp->pm_ResSectors = getushort(b50->bpbResSectors); |
| 271 | pmp->pm_FATs = b50->bpbFATs; |
| 272 | pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts); |
| 273 | pmp->pm_Sectors = getushort(b50->bpbSectors); |
| 274 | pmp->pm_Media = b50->bpbMedia; |
| 275 | pmp->pm_FATsecs = getushort(b50->bpbFATsecs); |
| 276 | pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack); |
| 277 | pmp->pm_Heads = getushort(b50->bpbHeads); |
| 278 | if (pmp->pm_Sectors == 0) { |
| 279 | pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs); |
| 280 | pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors); |
| 281 | } else { |
| 282 | pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs); |
| 283 | pmp->pm_HugeSectors = pmp->pm_Sectors; |
| 284 | } |
| 285 | pmp->pm_fatblk = pmp->pm_ResSectors; |
| 286 | pmp->pm_rootdirblk = pmp->pm_fatblk + |
| 287 | (pmp->pm_FATs * pmp->pm_FATsecs); |
| 288 | pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)) |
| 289 | / |
| 290 | pmp->pm_BytesPerSec; /* in sectors */ |
| 291 | pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize; |
| 292 | pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) / |
| 293 | pmp->pm_SectPerClust; |
| 294 | pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1; |
| 295 | pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec; |
| 296 | if (FAT12(pmp)) |
| 297 | /* This will usually be a floppy disk. |
| 298 | * This size makes sure that one fat entry will not be split |
| 299 | * across multiple blocks. */ |
| 300 | pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec; |
| 301 | else |
| 302 | /* This will usually be a hard disk. |
| 303 | * Reading or writing one block should be quite fast. */ |
| 304 | pmp->pm_fatblocksize = MAXBSIZE; |
| 305 | pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec; |
| 306 | |
| 307 | if ((pmp->pm_rootdirsize % pmp->pm_SectPerClust) != 0) |
| 308 | printf("mountpcfs(): root directory is not a multiple of the clustersize in length\n"); |
| 309 | |
| 310 | /* |
| 311 | * Compute mask and shift value for isolating cluster relative |
| 312 | * byte offsets and cluster numbers from a file offset. |
| 313 | */ |
| 314 | bpc = pmp->pm_SectPerClust * pmp->pm_BytesPerSec; |
| 315 | pmp->pm_bpcluster = bpc; |
| 316 | pmp->pm_depclust = bpc/sizeof(struct direntry); |
| 317 | pmp->pm_crbomask = bpc - 1; |
| 318 | if (bpc == 0) { |
| 319 | error = EINVAL; |
| 320 | goto error_exit; |
| 321 | } |
| 322 | bit = 1; |
| 323 | for (i = 0; i < 32; i++) { |
| 324 | if (bit & bpc) { |
| 325 | if (bit ^ bpc) { |
| 326 | error = EINVAL; |
| 327 | goto error_exit; |
| 328 | } |
| 329 | pmp->pm_cnshift = i; |
| 330 | break; |
| 331 | } |
| 332 | bit <<= 1; |
| 333 | } |
| 334 | |
| 335 | pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */ |
| 336 | pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */ |
| 337 | |
| 338 | /* |
| 339 | * Release the bootsector buffer. |
| 340 | */ |
| 341 | brelse(bp0); |
| 342 | bp0 = NULL; |
| 343 | |
| 344 | /* |
| 345 | * Allocate memory for the bitmap of allocated clusters, |
| 346 | * and then fill it in. |
| 347 | */ |
| 348 | pmp->pm_inusemap = malloc((pmp->pm_maxcluster >> 3) + 1, |
| 349 | M_PCFSFAT, M_WAITOK); |
| 350 | |
| 351 | /* |
| 352 | * fillinusemap() needs pm_devvp. |
| 353 | */ |
| 354 | pmp->pm_dev = dev; |
| 355 | pmp->pm_devvp = devvp; |
| 356 | |
| 357 | /* |
| 358 | * Have the inuse map filled in. |
| 359 | */ |
| 360 | error = fillinusemap(pmp); |
| 361 | if (error) |
| 362 | goto error_exit; |
| 363 | |
| 364 | /* |
| 365 | * If they want fat updates to be synchronous then let |
| 366 | * them suffer the performance degradation in exchange |
| 367 | * for the on disk copy of the fat being correct just |
| 368 | * about all the time. I suppose this would be a good |
| 369 | * thing to turn on if the kernel is still flakey. |
| 370 | */ |
| 371 | pmp->pm_waitonfat = mp->mnt_flag & MNT_SYNCHRONOUS; |
| 372 | |
| 373 | /* |
| 374 | * Finish up. |
| 375 | */ |
| 376 | pmp->pm_ronly = ronly; |
| 377 | if (ronly == 0) |
| 378 | pmp->pm_fmod = 1; |
| 379 | mp->mnt_data = (qaddr_t)pmp; |
| 380 | mp->mnt_stat.f_fsid.val[0] = (long)dev; |
| 381 | mp->mnt_stat.f_fsid.val[1] = MOUNT_MSDOS; |
| 382 | mp->mnt_flag |= MNT_LOCAL; |
| 383 | #if defined(QUOTA) |
| 384 | /* |
| 385 | * If we ever do quotas for DOS filesystems this would |
| 386 | * be a place to fill in the info in the pcfsmount |
| 387 | * structure. |
| 388 | * You dolt, quotas on dos filesystems make no sense |
| 389 | * because files have no owners on dos filesystems. |
| 390 | * of course there is some empty space in the directory |
| 391 | * entry where we could put uid's and gid's. |
| 392 | */ |
| 393 | #endif /* defined(QUOTA) */ |
| 394 | devvp->v_specflags |= SI_MOUNTEDON; |
| 395 | |
| 396 | return 0; |
| 397 | |
| 398 | error_exit:; |
| 399 | if (bp0) |
| 400 | brelse(bp0); |
| 401 | if (needclose) |
| 402 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, |
| 403 | NOCRED, p); |
| 404 | if (pmp) { |
| 405 | if (pmp->pm_inusemap) |
| 406 | free((caddr_t)pmp->pm_inusemap, M_PCFSFAT); |
| 407 | free((caddr_t)pmp, M_PCFSMNT); |
| 408 | mp->mnt_data = (qaddr_t)0; |
| 409 | } |
| 410 | return error; |
| 411 | } |
| 412 | |
| 413 | int |
| 414 | pcfs_start(mp, flags, p) |
| 415 | struct mount *mp; |
| 416 | int flags; |
| 417 | struct proc *p; |
| 418 | { |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /* |
| 423 | * Unmount the filesystem described by mp. |
| 424 | */ |
| 425 | int |
| 426 | pcfs_unmount(mp, mntflags, p) |
| 427 | struct mount *mp; |
| 428 | int mntflags; |
| 429 | struct proc *p; |
| 430 | { |
| 431 | int flags = 0; |
| 432 | int error; |
| 433 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 434 | struct vnode *vp = pmp->pm_devvp; |
| 435 | |
| 436 | if (mntflags & MNT_FORCE) { |
| 437 | if (!pcfsdoforce) |
| 438 | return EINVAL; |
| 439 | flags |= FORCECLOSE; |
| 440 | } |
| 441 | mntflushbuf(mp, 0); |
| 442 | if (mntinvalbuf(mp)) |
| 443 | return EBUSY; |
| 444 | #if defined(QUOTA) |
| 445 | #endif /* defined(QUOTA) */ |
| 446 | if (error = vflush(mp, NULLVP, flags)) |
| 447 | return error; |
| 448 | pmp->pm_devvp->v_specflags &= ~SI_MOUNTEDON; |
| 449 | #if defined(PCFSDEBUG) |
| 450 | printf("pcfs_umount(): just before calling VOP_CLOSE()\n"); |
| 451 | printf("flag %08x, usecount %d, writecount %d, holdcnt %d\n", |
| 452 | vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt); |
| 453 | printf("lastr %d, id %d, mount %08x, op %08x\n", |
| 454 | vp->v_lastr, vp->v_id, vp->v_mount, vp->v_op); |
| 455 | printf("freef %08x, freeb %08x, mountf %08x, mountb %08x\n", |
| 456 | vp->v_freef, vp->v_freeb, vp->v_mountf, vp->v_mountb); |
| 457 | printf("cleanblkhd %08x, dirtyblkhd %08x, numoutput %d, type %d\n", |
| 458 | vp->v_cleanblkhd, vp->v_dirtyblkhd, vp->v_numoutput, vp->v_type); |
| 459 | printf("union %08x, tag %d, data[0] %08x, data[1] %08x\n", |
| 460 | vp->v_socket, vp->v_tag, vp->v_data[0], vp->v_data[1]); |
| 461 | #endif /* defined(PCFSDEBUG) */ |
| 462 | error = VOP_CLOSE(pmp->pm_devvp, pmp->pm_ronly ? FREAD : FREAD|FWRITE, |
| 463 | NOCRED, p); |
| 464 | vrele(pmp->pm_devvp); |
| 465 | free((caddr_t)pmp->pm_inusemap, M_PCFSFAT); |
| 466 | free((caddr_t)pmp, M_PCFSMNT); |
| 467 | mp->mnt_data = (qaddr_t)0; |
| 468 | mp->mnt_flag &= ~MNT_LOCAL; |
| 469 | return error; |
| 470 | } |
| 471 | |
| 472 | int |
| 473 | pcfs_root(mp, vpp) |
| 474 | struct mount *mp; |
| 475 | struct vnode **vpp; |
| 476 | { |
| 477 | struct denode *ndep; |
| 478 | struct pcfsmount *pmp = (struct pcfsmount *)(mp->mnt_data); |
| 479 | int error; |
| 480 | |
| 481 | error = deget(pmp, PCFSROOT, PCFSROOT_OFS, NULL, &ndep); |
| 482 | #if defined(PCFSDEBUG) |
| 483 | printf("pcfs_root(); mp %08x, pmp %08x, ndep %08x, vp %08x\n", |
| 484 | mp, pmp, ndep, DETOV(ndep)); |
| 485 | #endif /* defined(PCFSDEBUG) */ |
| 486 | if (error == 0) |
| 487 | *vpp = DETOV(ndep); |
| 488 | return error; |
| 489 | } |
| 490 | |
| 491 | int |
| 492 | pcfs_quotactl(mp, cmds, uid, arg, p) |
| 493 | struct mount *mp; |
| 494 | int cmds; |
| 495 | uid_t uid; |
| 496 | caddr_t arg; |
| 497 | struct proc *p; |
| 498 | { |
| 499 | #if defined(QUOTA) |
| 500 | #else |
| 501 | return EOPNOTSUPP; |
| 502 | #endif /* defined(QUOTA) */ |
| 503 | } |
| 504 | |
| 505 | int |
| 506 | pcfs_statfs(mp, sbp, p) |
| 507 | struct mount *mp; |
| 508 | struct statfs *sbp; |
| 509 | struct proc *p; |
| 510 | { |
| 511 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 512 | |
| 513 | /* |
| 514 | * Fill in the stat block. |
| 515 | */ |
| 516 | sbp->f_type = MOUNT_MSDOS; |
| 517 | sbp->f_fsize = pmp->pm_bpcluster; |
| 518 | sbp->f_bsize = pmp->pm_bpcluster; |
| 519 | sbp->f_blocks = pmp->pm_nmbrofclusters; |
| 520 | sbp->f_bfree = pmp->pm_freeclustercount; |
| 521 | sbp->f_bavail = pmp->pm_freeclustercount; |
| 522 | sbp->f_files = pmp->pm_RootDirEnts; |
| 523 | sbp->f_ffree = 0; /* what to put in here? */ |
| 524 | |
| 525 | /* |
| 526 | * Copy the mounted on and mounted from names into |
| 527 | * the passed in stat block, if it is not the one |
| 528 | * in the mount structure. |
| 529 | */ |
| 530 | if (sbp != &mp->mnt_stat) { |
| 531 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, |
| 532 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
| 533 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
| 534 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
| 535 | } |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | int |
| 540 | pcfs_sync(mp, waitfor) |
| 541 | struct mount *mp; |
| 542 | int waitfor; |
| 543 | { |
| 544 | struct vnode *vp; |
| 545 | struct denode *dep; |
| 546 | struct pcfsmount *pmp; |
| 547 | int error; |
| 548 | int allerror = 0; |
| 549 | |
| 550 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 551 | |
| 552 | /* |
| 553 | * If we ever switch to not updating all of the fats |
| 554 | * all the time, this would be the place to update them |
| 555 | * from the first one. |
| 556 | */ |
| 557 | if (pmp->pm_fmod) { |
| 558 | if (pmp->pm_ronly) { |
| 559 | printf("pcfs_sync(): writing to readonly filesystem\n"); |
| 560 | return EINVAL; |
| 561 | } else { |
| 562 | /* update fats here */ |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Go thru in memory denodes and write them out along |
| 568 | * with unwritten file blocks. |
| 569 | */ |
| 570 | loop: |
| 571 | for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) { |
| 572 | if (vp->v_mount != mp) /* not ours anymore */ |
| 573 | goto loop; |
| 574 | if (VOP_ISLOCKED(vp)) /* file is busy */ |
| 575 | continue; |
| 576 | dep = VTODE(vp); |
| 577 | if ((dep->de_flag & DEUPD) == 0 && vp->v_dirtyblkhd == NULL) |
| 578 | continue; |
| 579 | if (vget(vp)) /* not there anymore? */ |
| 580 | goto loop; |
| 581 | if (vp->v_dirtyblkhd) /* flush dirty file blocks */ |
| 582 | vflushbuf(vp, 0); |
| 583 | if ((dep->de_flag & DEUPD) && |
| 584 | (error = deupdat(dep, &time, 0))) |
| 585 | allerror = error; |
| 586 | vput(vp); /* done with this one */ |
| 587 | } |
| 588 | |
| 589 | /* |
| 590 | * Flush filesystem control info. |
| 591 | */ |
| 592 | vflushbuf(pmp->pm_devvp, waitfor == MNT_WAIT ? B_SYNC : 0); |
| 593 | return allerror; |
| 594 | } |
| 595 | |
| 596 | int |
| 597 | pcfs_fhtovp (mp, fhp, vpp) |
| 598 | struct mount *mp; |
| 599 | struct fid *fhp; |
| 600 | struct vnode **vpp; |
| 601 | { |
| 602 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 603 | struct defid *defhp = (struct defid *)fhp; |
| 604 | struct denode *dep; |
| 605 | int error; |
| 606 | |
| 607 | error = deget (pmp, defhp->defid_dirclust, defhp->defid_dirofs, |
| 608 | NULL, &dep); |
| 609 | if (error) |
| 610 | return (error); |
| 611 | *vpp = DETOV (dep); |
| 612 | return (0); |
| 613 | } |
| 614 | |
| 615 | |
| 616 | int |
| 617 | pcfs_vptofh (vp, fhp) |
| 618 | struct vnode *vp; |
| 619 | struct fid *fhp; |
| 620 | { |
| 621 | struct denode *dep = VTODE(vp); |
| 622 | struct defid *defhp = (struct defid *)fhp; |
| 623 | |
| 624 | defhp->defid_len = sizeof(struct defid); |
| 625 | defhp->defid_dirclust = dep->de_dirclust; |
| 626 | defhp->defid_dirofs = dep->de_diroffset; |
| 627 | /* defhp->defid_gen = ip->i_gen; */ |
| 628 | return (0); |
| 629 | } |
| 630 | |
| 631 | struct vfsops pcfs_vfsops = { |
| 632 | pcfs_mount, |
| 633 | pcfs_start, |
| 634 | pcfs_unmount, |
| 635 | pcfs_root, |
| 636 | pcfs_quotactl, |
| 637 | pcfs_statfs, |
| 638 | pcfs_sync, |
| 639 | pcfs_fhtovp, |
| 640 | pcfs_vptofh, |
| 641 | pcfs_init |
| 642 | }; |