| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | * |
| 17 | * @(#)ffs_vfsops.c 7.20 (Berkeley) %G% |
| 18 | */ |
| 19 | |
| 20 | #include "param.h" |
| 21 | #include "systm.h" |
| 22 | #include "time.h" |
| 23 | #include "kernel.h" |
| 24 | #include "namei.h" |
| 25 | #include "vnode.h" |
| 26 | #include "mount.h" |
| 27 | #include "buf.h" |
| 28 | #include "ucred.h" |
| 29 | #include "file.h" |
| 30 | #include "disklabel.h" |
| 31 | #include "ioctl.h" |
| 32 | #include "errno.h" |
| 33 | #include "malloc.h" |
| 34 | #include "../ufs/fs.h" |
| 35 | #include "../ufs/ufsmount.h" |
| 36 | #include "../ufs/inode.h" |
| 37 | #include "ioctl.h" |
| 38 | #include "disklabel.h" |
| 39 | #include "stat.h" |
| 40 | |
| 41 | /* |
| 42 | * ufs vfs operations. |
| 43 | */ |
| 44 | int ufs_mount(); |
| 45 | int ufs_start(); |
| 46 | int ufs_unmount(); |
| 47 | int ufs_root(); |
| 48 | int ufs_statfs(); |
| 49 | int ufs_sync(); |
| 50 | int ufs_fhtovp(); |
| 51 | int ufs_vptofh(); |
| 52 | |
| 53 | struct vfsops ufs_vfsops = { |
| 54 | ufs_mount, |
| 55 | ufs_start, |
| 56 | ufs_unmount, |
| 57 | ufs_root, |
| 58 | ufs_statfs, |
| 59 | ufs_sync, |
| 60 | ufs_fhtovp, |
| 61 | ufs_vptofh |
| 62 | }; |
| 63 | |
| 64 | /* |
| 65 | * ufs mount table. |
| 66 | */ |
| 67 | struct ufsmount mounttab[NMOUNT]; |
| 68 | |
| 69 | /* |
| 70 | * Called by vfs_mountroot when ufs is going to be mounted as root |
| 71 | * |
| 72 | * XXX - Need to have a way of figuring the name of the root device |
| 73 | */ |
| 74 | #define ROOTNAME "root device" |
| 75 | |
| 76 | ufs_mountroot() |
| 77 | { |
| 78 | register struct mount *mp; |
| 79 | extern struct vnode *rootvp; |
| 80 | struct ufsmount *ump; |
| 81 | register struct fs *fs; |
| 82 | u_int size; |
| 83 | int error; |
| 84 | |
| 85 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
| 86 | M_MOUNT, M_WAITOK); |
| 87 | mp->m_op = &ufs_vfsops; |
| 88 | mp->m_flag = 0; |
| 89 | mp->m_exroot = 0; |
| 90 | error = mountfs(rootvp, mp); |
| 91 | if (error) { |
| 92 | free((caddr_t)mp, M_MOUNT); |
| 93 | return (error); |
| 94 | } |
| 95 | error = vfs_add((struct vnode *)0, mp, 0); |
| 96 | if (error) { |
| 97 | (void)ufs_unmount(mp, 0); |
| 98 | free((caddr_t)mp, M_MOUNT); |
| 99 | return (error); |
| 100 | } |
| 101 | ump = VFSTOUFS(mp); |
| 102 | fs = ump->um_fs; |
| 103 | fs->fs_fsmnt[0] = '/'; |
| 104 | bzero(fs->fs_fsmnt + 1, sizeof(fs->fs_fsmnt) - 1); |
| 105 | (void) copystr(ROOTNAME, ump->um_mntname, MNAMELEN - 1, &size); |
| 106 | bzero(ump->um_mntname + size, MNAMELEN - size); |
| 107 | vfs_unlock(mp); |
| 108 | inittodr(fs->fs_time); |
| 109 | return (0); |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * VFS Operations. |
| 114 | * |
| 115 | * mount system call |
| 116 | */ |
| 117 | ufs_mount(mp, path, data, ndp) |
| 118 | struct mount *mp; |
| 119 | char *path; |
| 120 | caddr_t data; |
| 121 | struct nameidata *ndp; |
| 122 | { |
| 123 | struct vnode *devvp; |
| 124 | struct ufs_args args; |
| 125 | struct ufsmount *ump; |
| 126 | register struct fs *fs; |
| 127 | u_int size; |
| 128 | int error; |
| 129 | |
| 130 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) |
| 131 | return (error); |
| 132 | if ((error = getmdev(&devvp, args.fspec, ndp)) != 0) |
| 133 | return (error); |
| 134 | error = mountfs(devvp, mp); |
| 135 | if (error) { |
| 136 | vrele(devvp); |
| 137 | return (error); |
| 138 | } |
| 139 | ump = VFSTOUFS(mp); |
| 140 | fs = ump->um_fs; |
| 141 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); |
| 142 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); |
| 143 | (void) copyinstr(args.fspec, ump->um_mntname, MNAMELEN - 1, &size); |
| 144 | bzero(ump->um_mntname + size, MNAMELEN - size); |
| 145 | return (0); |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Common code for mount and mountroot |
| 150 | */ |
| 151 | mountfs(devvp, mp) |
| 152 | struct vnode *devvp; |
| 153 | struct mount *mp; |
| 154 | { |
| 155 | register struct ufsmount *ump; |
| 156 | struct ufsmount *fmp = NULL; |
| 157 | struct buf *bp = NULL; |
| 158 | register struct fs *fs; |
| 159 | dev_t dev = devvp->v_rdev; |
| 160 | struct partinfo dpart; |
| 161 | int havepart = 0, blks; |
| 162 | caddr_t base, space; |
| 163 | int havepart = 0, blks; |
| 164 | int error, i, size; |
| 165 | int needclose = 0; |
| 166 | int ronly = (mp->m_flag & M_RDONLY) != 0; |
| 167 | |
| 168 | for (ump = &mounttab[0]; ump < &mounttab[NMOUNT]; ump++) { |
| 169 | if (ump->um_fs == NULL) { |
| 170 | if (fmp == NULL) |
| 171 | fmp = ump; |
| 172 | } else if (dev == ump->um_dev) { |
| 173 | return (EBUSY); /* needs translation */ |
| 174 | } |
| 175 | } |
| 176 | (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE, |
| 177 | S_IFBLK); |
| 178 | if (error) { |
| 179 | ump->um_fs = NULL; |
| 180 | return (error); |
| 181 | } |
| 182 | needclose = 1; |
| 183 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED) != 0) |
| 184 | size = DEV_BSIZE; |
| 185 | else { |
| 186 | havepart = 1; |
| 187 | size = dpart.disklab->d_secsize; |
| 188 | } |
| 189 | if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) { |
| 190 | ump->um_fs = NULL; |
| 191 | goto out; |
| 192 | } |
| 193 | fs = bp->b_un.b_fs; |
| 194 | ump->um_fs = NULL; |
| 195 | error = EINVAL; /* XXX also needs translation */ |
| 196 | goto out; |
| 197 | } |
| 198 | ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK, |
| 199 | M_WAITOK); |
| 200 | bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs, |
| 201 | (u_int)fs->fs_sbsize); |
| 202 | brelse(bp); |
| 203 | bp = NULL; |
| 204 | fs = ump->um_fs; |
| 205 | fs->fs_ronly = ronly; |
| 206 | if (ronly == 0) |
| 207 | fs->fs_fmod = 1; |
| 208 | if (havepart) { |
| 209 | dpart.part->p_fstype = FS_BSDFFS; |
| 210 | dpart.part->p_fsize = fs->fs_fsize; |
| 211 | dpart.part->p_frag = fs->fs_frag; |
| 212 | dpart.part->p_cpg = fs->fs_cpg; |
| 213 | } |
| 214 | #ifdef SECSIZE |
| 215 | /* |
| 216 | * If we have a disk label, force per-partition |
| 217 | * filesystem information to be correct |
| 218 | * and set correct current fsbtodb shift. |
| 219 | */ |
| 220 | #endif SECSIZE |
| 221 | if (havepart) { |
| 222 | dpart.part->p_fstype = FS_BSDFFS; |
| 223 | dpart.part->p_fsize = fs->fs_fsize; |
| 224 | dpart.part->p_frag = fs->fs_frag; |
| 225 | #ifdef SECSIZE |
| 226 | #ifdef tahoe |
| 227 | /* |
| 228 | * Save the original fsbtodb shift to restore on updates. |
| 229 | * (Console doesn't understand fsbtodb changes.) |
| 230 | */ |
| 231 | fs->fs_sparecon[0] = fs->fs_fsbtodb; |
| 232 | #endif |
| 233 | i = fs->fs_fsize / size; |
| 234 | for (fs->fs_fsbtodb = 0; i > 1; i >>= 1) |
| 235 | fs->fs_fsbtodb++; |
| 236 | #endif SECSIZE |
| 237 | fs->fs_dbsize = size; |
| 238 | } |
| 239 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 240 | base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK, |
| 241 | M_WAITOK); |
| 242 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 243 | size = fs->fs_bsize; |
| 244 | if (i + fs->fs_frag > blks) |
| 245 | size = (blks - i) * fs->fs_fsize; |
| 246 | #ifdef SECSIZE |
| 247 | tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 248 | fs->fs_dbsize); |
| 249 | #else SECSIZE |
| 250 | error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 251 | NOCRED, &bp); |
| 252 | if (error) { |
| 253 | free((caddr_t)base, M_SUPERBLK); |
| 254 | goto out; |
| 255 | } |
| 256 | bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size); |
| 257 | fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; |
| 258 | space += size; |
| 259 | brelse(bp); |
| 260 | bp = NULL; |
| 261 | } |
| 262 | mp->m_data = (qaddr_t)ump; |
| 263 | mp->m_bsize = fs->fs_bsize; |
| 264 | mp->m_fsize = fs->fs_fsize; |
| 265 | mp->m_fsid.val[0] = (long)dev; |
| 266 | mp->m_fsid.val[1] = MOUNT_UFS; |
| 267 | ump->um_mountp = mp; |
| 268 | ump->um_dev = dev; |
| 269 | ump->um_devvp = devvp; |
| 270 | ump->um_qinod = NULL; |
| 271 | devvp->v_mount = mp; |
| 272 | |
| 273 | /* Sanity checks for old file systems. XXX */ |
| 274 | fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */ |
| 275 | fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */ |
| 276 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 277 | fs->fs_nrpos = 8; /* XXX */ |
| 278 | |
| 279 | return (0); |
| 280 | out: |
| 281 | if (needclose) |
| 282 | (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); |
| 283 | if (ump->um_fs) { |
| 284 | free((caddr_t)ump->um_fs, M_SUPERBLK); |
| 285 | ump->um_fs = NULL; |
| 286 | } |
| 287 | if (bp) |
| 288 | brelse(bp); |
| 289 | return (error); |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * Make a filesystem operational. |
| 294 | * Nothing to do at the moment. |
| 295 | */ |
| 296 | ufs_start(mp, flags) |
| 297 | struct mount *mp; |
| 298 | int flags; |
| 299 | { |
| 300 | |
| 301 | return (0); |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * unmount system call |
| 306 | */ |
| 307 | ufs_unmount(mp, flags) |
| 308 | struct mount *mp; |
| 309 | int flags; |
| 310 | { |
| 311 | register struct ufsmount *ump; |
| 312 | register struct fs *fs; |
| 313 | dev_t dev; |
| 314 | int error, ronly; |
| 315 | |
| 316 | if (flags & MNT_FORCE) |
| 317 | return (EINVAL); |
| 318 | ump = VFSTOUFS(mp); |
| 319 | dev = ump->um_dev; |
| 320 | #ifdef QUOTA |
| 321 | if ((error = iflush(dev, mp->m_qinod)) && !forcibly) |
| 322 | #else |
| 323 | if ((error = iflush(dev)) && !forcibly) |
| 324 | #endif |
| 325 | return (error); |
| 326 | #ifdef QUOTA |
| 327 | (void)closedq(ump); |
| 328 | /* |
| 329 | * Here we have to iflush again to get rid of the quota inode. |
| 330 | * A drag, but it would be ugly to cheat, & this doesn't happen often. |
| 331 | */ |
| 332 | (void)iflush(dev, (struct inode *)NULL); |
| 333 | #endif |
| 334 | fs = ump->um_fs; |
| 335 | ronly = !fs->fs_ronly; |
| 336 | free((caddr_t)fs->fs_csp[0], M_SUPERBLK); |
| 337 | error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE); |
| 338 | irele(ip); |
| 339 | return (error); |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Return root of a filesystem |
| 344 | */ |
| 345 | ufs_root(mp, vpp) |
| 346 | struct mount *mp; |
| 347 | struct vnode **vpp; |
| 348 | { |
| 349 | struct inode tip, *ip; |
| 350 | int error; |
| 351 | |
| 352 | tip.i_dev = VFSTOUFS(mp)->um_dev; |
| 353 | tip.i_vnode.v_mount = mp; |
| 354 | error = iget(&tip, (ino_t)ROOTINO, &ip); |
| 355 | if (error) |
| 356 | return (error); |
| 357 | *vpp = ITOV(ip); |
| 358 | return (0); |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * Get file system statistics. |
| 363 | */ |
| 364 | ufs_statfs(mp, sbp) |
| 365 | struct mount *mp; |
| 366 | register struct statfs *sbp; |
| 367 | { |
| 368 | register struct ufsmount *ump; |
| 369 | register struct fs *fs; |
| 370 | |
| 371 | ump = VFSTOUFS(mp); |
| 372 | fs = ump->um_fs; |
| 373 | if (fs->fs_magic != FS_MAGIC) |
| 374 | panic("ufs_statfs"); |
| 375 | sbp->f_type = MOUNT_UFS; |
| 376 | sbp->f_flags = mp->m_flag &~ (M_MLOCK|M_MWAIT); |
| 377 | sbp->f_fsize = fs->fs_fsize; |
| 378 | sbp->f_bsize = fs->fs_bsize; |
| 379 | sbp->f_blocks = fs->fs_dsize; |
| 380 | sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + |
| 381 | fs->fs_cstotal.cs_nffree; |
| 382 | sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - |
| 383 | (fs->fs_dsize - sbp->f_bfree); |
| 384 | if (sbp->f_bavail < 0) |
| 385 | sbp->f_bavail = 0; |
| 386 | sbp->f_files = fs->fs_ncg * fs->fs_ipg; |
| 387 | sbp->f_ffree = fs->fs_cstotal.cs_nifree; |
| 388 | sbp->f_fsid = mp->m_fsid; |
| 389 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
| 390 | bcopy((caddr_t)ump->um_mntname, (caddr_t)&sbp->f_mntfromname[0], |
| 391 | MNAMELEN); |
| 392 | return (0); |
| 393 | } |
| 394 | |
| 395 | int syncprt = 0; |
| 396 | |
| 397 | /* |
| 398 | * Go through the disk queues to initiate sandbagged IO; |
| 399 | * go through the inodes to write those that have been modified; |
| 400 | * initiate the writing of the super block if it has been modified. |
| 401 | */ |
| 402 | ufs_sync(mp, waitfor) |
| 403 | struct mount *mp; |
| 404 | int waitfor; |
| 405 | { |
| 406 | register struct inode *ip; |
| 407 | register struct ufsmount *ump = VFSTOUFS(mp); |
| 408 | register struct fs *fs; |
| 409 | int error = 0; |
| 410 | static int updlock = 0; |
| 411 | |
| 412 | if (syncprt) |
| 413 | bufstats(); |
| 414 | if (updlock) |
| 415 | return (EBUSY); |
| 416 | fs = ump->um_fs; |
| 417 | if (fs == (struct fs *)1) |
| 418 | return (0); |
| 419 | updlock++; |
| 420 | /* |
| 421 | * Write back modified superblock. |
| 422 | * Consistency check that the superblock |
| 423 | * is still in the buffer cache. |
| 424 | */ |
| 425 | if (fs->fs_fmod != 0) { |
| 426 | if (fs->fs_ronly != 0) { /* XXX */ |
| 427 | printf("fs = %s\n", fs->fs_fsmnt); |
| 428 | panic("update: rofs mod"); |
| 429 | } |
| 430 | fs->fs_fmod = 0; |
| 431 | fs->fs_time = time.tv_sec; |
| 432 | error = sbupdate(ump, waitfor); |
| 433 | } |
| 434 | /* |
| 435 | * Write back each (modified) inode. |
| 436 | */ |
| 437 | for (ip = inode; ip < inodeNINODE; ip++) { |
| 438 | if (ip->i_devvp != ump->um_devvp || |
| 439 | (ip->i_flag & ILOCKED) != 0 || ITOV(ip)->v_count == 0 || |
| 440 | (ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0) |
| 441 | continue; |
| 442 | ILOCK(ip); |
| 443 | VREF(ITOV(ip)); |
| 444 | error = iupdat(ip, &time, &time, waitfor == MNT_WAIT); |
| 445 | iput(ip); |
| 446 | } |
| 447 | updlock = 0; |
| 448 | /* |
| 449 | * Force stale buffer cache information to be flushed. |
| 450 | */ |
| 451 | bflush(ump->um_devvp->v_mount); |
| 452 | return (error); |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * Write a superblock and associated information back to disk. |
| 457 | */ |
| 458 | sbupdate(mp, waitfor) |
| 459 | struct ufsmount *mp; |
| 460 | int waitfor; |
| 461 | { |
| 462 | register struct fs *fs = mp->um_fs; |
| 463 | register struct buf *bp; |
| 464 | int blks; |
| 465 | caddr_t space; |
| 466 | int i, size, error = 0; |
| 467 | |
| 468 | #ifdef SECSIZE |
| 469 | bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize), |
| 470 | (int)fs->fs_sbsize, fs->fs_dbsize); |
| 471 | #else SECSIZE |
| 472 | bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize); |
| 473 | #endif SECSIZE |
| 474 | bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize); |
| 475 | /* Restore compatibility to old file systems. XXX */ |
| 476 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 477 | bp->b_un.b_fs->fs_nrpos = -1; /* XXX */ |
| 478 | #ifdef SECSIZE |
| 479 | #ifdef tahoe |
| 480 | /* restore standard fsbtodb shift */ |
| 481 | bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0]; |
| 482 | bp->b_un.b_fs->fs_sparecon[0] = 0; |
| 483 | #endif |
| 484 | #endif SECSIZE |
| 485 | if (waitfor == MNT_WAIT) |
| 486 | error = bwrite(bp); |
| 487 | else |
| 488 | bawrite(bp); |
| 489 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 490 | space = (caddr_t)fs->fs_csp[0]; |
| 491 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 492 | size = fs->fs_bsize; |
| 493 | if (i + fs->fs_frag > blks) |
| 494 | size = (blks - i) * fs->fs_fsize; |
| 495 | #ifdef SECSIZE |
| 496 | bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 497 | fs->fs_dbsize); |
| 498 | #else SECSIZE |
| 499 | bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size); |
| 500 | #endif SECSIZE |
| 501 | bcopy(space, bp->b_un.b_addr, (u_int)size); |
| 502 | space += size; |
| 503 | if (waitfor == MNT_WAIT) |
| 504 | error = bwrite(bp); |
| 505 | else |
| 506 | bawrite(bp); |
| 507 | } |
| 508 | return (error); |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Print out statistics on the current allocation of the buffer pool. |
| 513 | * Can be enabled to print out on every ``sync'' by setting "syncprt" |
| 514 | * above. |
| 515 | */ |
| 516 | bufstats() |
| 517 | { |
| 518 | int s, i, j, count; |
| 519 | register struct buf *bp, *dp; |
| 520 | int counts[MAXBSIZE/CLBYTES+1]; |
| 521 | static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" }; |
| 522 | |
| 523 | for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) { |
| 524 | count = 0; |
| 525 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) |
| 526 | counts[j] = 0; |
| 527 | s = splbio(); |
| 528 | for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) { |
| 529 | counts[dp->b_bufsize/CLBYTES]++; |
| 530 | count++; |
| 531 | } |
| 532 | splx(s); |
| 533 | printf("%s: total-%d", bname[i], count); |
| 534 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) |
| 535 | if (counts[j] != 0) |
| 536 | printf(", %d-%d", j * CLBYTES, counts[j]); |
| 537 | printf("\n"); |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * File handle to vnode |
| 543 | * |
| 544 | * Have to be really careful about stale file handles: |
| 545 | * - check that the inode number is in range |
| 546 | * - call iget() to get the locked inode |
| 547 | * - check for an unallocated inode (i_mode == 0) |
| 548 | * - check that the generation number matches |
| 549 | */ |
| 550 | ufs_fhtovp(mp, fhp, vpp) |
| 551 | register struct mount *mp; |
| 552 | struct fid *fhp; |
| 553 | struct vnode **vpp; |
| 554 | { |
| 555 | register struct ufid *ufhp; |
| 556 | register struct fs *fs; |
| 557 | struct inode tip, *ip; |
| 558 | int error; |
| 559 | |
| 560 | ufhp = (struct ufid *)fhp; |
| 561 | fs = VFSTOUFS(mp)->um_fs; |
| 562 | if (ufhp->ufid_ino < ROOTINO || |
| 563 | ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) { |
| 564 | *vpp = (struct vnode *)0; |
| 565 | return (EINVAL); |
| 566 | } |
| 567 | tip.i_dev = VFSTOUFS(mp)->um_dev; |
| 568 | tip.i_vnode.v_mount = mp; |
| 569 | if (error = iget(&tip, ufhp->ufid_ino, &ip)) { |
| 570 | *vpp = (struct vnode *)0; |
| 571 | return (error); |
| 572 | } |
| 573 | if (ip->i_mode == 0) { |
| 574 | iput(ip); |
| 575 | *vpp = (struct vnode *)0; |
| 576 | return (EINVAL); |
| 577 | } |
| 578 | if (ip->i_gen != ufhp->ufid_gen) { |
| 579 | iput(ip); |
| 580 | *vpp = (struct vnode *)0; |
| 581 | return (EINVAL); |
| 582 | } |
| 583 | *vpp = ITOV(ip); |
| 584 | return (0); |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Vnode pointer to File handle |
| 589 | */ |
| 590 | /* ARGSUSED */ |
| 591 | ufs_vptofh(vp, fhp) |
| 592 | struct vnode *vp; |
| 593 | struct fid *fhp; |
| 594 | { |
| 595 | register struct inode *ip = VTOI(vp); |
| 596 | register struct ufid *ufhp; |
| 597 | |
| 598 | ufhp = (struct ufid *)fhp; |
| 599 | ufhp->ufid_len = sizeof(struct ufid); |
| 600 | ufhp->ufid_ino = ip->i_number; |
| 601 | ufhp->ufid_gen = ip->i_gen; |
| 602 | return (0); |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * Common code for mount and quota. |
| 607 | * Check that the user's argument is a reasonable |
| 608 | * thing on which to mount, and return the device number if so. |
| 609 | */ |
| 610 | getmdev(devvpp, fname, ndp) |
| 611 | struct vnode **devvpp; |
| 612 | caddr_t fname; |
| 613 | register struct nameidata *ndp; |
| 614 | { |
| 615 | register struct vnode *vp; |
| 616 | int error; |
| 617 | |
| 618 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; |
| 619 | ndp->ni_segflg = UIO_USERSPACE; |
| 620 | ndp->ni_dirp = fname; |
| 621 | if (error = namei(ndp)) { |
| 622 | if (error == ENOENT) |
| 623 | return (ENODEV); /* needs translation */ |
| 624 | return (error); |
| 625 | } |
| 626 | vp = ndp->ni_vp; |
| 627 | if (vp->v_type != VBLK) { |
| 628 | vput(vp); |
| 629 | return (ENOTBLK); |
| 630 | } |
| 631 | if (major(vp->v_rdev) >= nblkdev) |
| 632 | return (ENXIO); |
| 633 | iunlock(VTOI(vp)); |
| 634 | *devvpp = vp; |
| 635 | return (0); |
| 636 | } |