| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | * |
| 7 | * @(#)lfs_vfsops.c 7.54 (Berkeley) %G% |
| 8 | */ |
| 9 | |
| 10 | #include "param.h" |
| 11 | #include "systm.h" |
| 12 | #include "namei.h" |
| 13 | #include "proc.h" |
| 14 | #include "kernel.h" |
| 15 | #include "vnode.h" |
| 16 | #include "specdev.h" |
| 17 | #include "mount.h" |
| 18 | #include "buf.h" |
| 19 | #include "file.h" |
| 20 | #include "disklabel.h" |
| 21 | #include "ioctl.h" |
| 22 | #include "errno.h" |
| 23 | #include "malloc.h" |
| 24 | #include "ioctl.h" |
| 25 | #include "disklabel.h" |
| 26 | #include "stat.h" |
| 27 | |
| 28 | #include "quota.h" |
| 29 | #include "fs.h" |
| 30 | #include "ufsmount.h" |
| 31 | #include "inode.h" |
| 32 | |
| 33 | struct vfsops ufs_vfsops = { |
| 34 | ufs_mount, |
| 35 | ufs_start, |
| 36 | ufs_unmount, |
| 37 | ufs_root, |
| 38 | ufs_quotactl, |
| 39 | ufs_statfs, |
| 40 | ufs_sync, |
| 41 | ufs_fhtovp, |
| 42 | ufs_vptofh, |
| 43 | ufs_init |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * Flag to allow forcible unmounting. |
| 48 | */ |
| 49 | int doforce = 1; |
| 50 | |
| 51 | /* |
| 52 | * Called by vfs_mountroot when ufs is going to be mounted as root. |
| 53 | * |
| 54 | * Name is updated by mount(8) after booting. |
| 55 | */ |
| 56 | #define ROOTNAME "root_device" |
| 57 | |
| 58 | ufs_mountroot() |
| 59 | { |
| 60 | register struct mount *mp; |
| 61 | extern struct vnode *rootvp; |
| 62 | struct proc *p = curproc; /* XXX */ |
| 63 | struct ufsmount *ump; |
| 64 | register struct fs *fs; |
| 65 | u_int size; |
| 66 | int error; |
| 67 | |
| 68 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
| 69 | M_MOUNT, M_WAITOK); |
| 70 | mp->mnt_op = &ufs_vfsops; |
| 71 | mp->mnt_flag = MNT_RDONLY; |
| 72 | mp->mnt_exroot = 0; |
| 73 | mp->mnt_mounth = NULLVP; |
| 74 | error = mountfs(rootvp, mp, p); |
| 75 | if (error) { |
| 76 | free((caddr_t)mp, M_MOUNT); |
| 77 | return (error); |
| 78 | } |
| 79 | if (error = vfs_lock(mp)) { |
| 80 | (void)ufs_unmount(mp, 0, p); |
| 81 | free((caddr_t)mp, M_MOUNT); |
| 82 | return (error); |
| 83 | } |
| 84 | rootfs = mp; |
| 85 | mp->mnt_next = mp; |
| 86 | mp->mnt_prev = mp; |
| 87 | mp->mnt_vnodecovered = NULLVP; |
| 88 | ump = VFSTOUFS(mp); |
| 89 | fs = ump->um_fs; |
| 90 | bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); |
| 91 | fs->fs_fsmnt[0] = '/'; |
| 92 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
| 93 | MNAMELEN); |
| 94 | (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 95 | &size); |
| 96 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 97 | (void) ufs_statfs(mp, &mp->mnt_stat, p); |
| 98 | vfs_unlock(mp); |
| 99 | inittodr(fs->fs_time); |
| 100 | return (0); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * VFS Operations. |
| 105 | * |
| 106 | * mount system call |
| 107 | */ |
| 108 | ufs_mount(mp, path, data, ndp, p) |
| 109 | register struct mount *mp; |
| 110 | char *path; |
| 111 | caddr_t data; |
| 112 | struct nameidata *ndp; |
| 113 | struct proc *p; |
| 114 | { |
| 115 | struct vnode *devvp; |
| 116 | struct ufs_args args; |
| 117 | struct ufsmount *ump; |
| 118 | register struct fs *fs; |
| 119 | u_int size; |
| 120 | int error; |
| 121 | |
| 122 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) |
| 123 | return (error); |
| 124 | /* |
| 125 | * Process export requests. |
| 126 | */ |
| 127 | if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) { |
| 128 | if (args.exflags & MNT_EXPORTED) |
| 129 | mp->mnt_flag |= MNT_EXPORTED; |
| 130 | else |
| 131 | mp->mnt_flag &= ~MNT_EXPORTED; |
| 132 | if (args.exflags & MNT_EXRDONLY) |
| 133 | mp->mnt_flag |= MNT_EXRDONLY; |
| 134 | else |
| 135 | mp->mnt_flag &= ~MNT_EXRDONLY; |
| 136 | mp->mnt_exroot = args.exroot; |
| 137 | } |
| 138 | if ((mp->mnt_flag & MNT_UPDATE) == 0) { |
| 139 | if ((error = getmdev(&devvp, args.fspec, ndp, p)) != 0) |
| 140 | return (error); |
| 141 | error = mountfs(devvp, mp, p); |
| 142 | } else { |
| 143 | ump = VFSTOUFS(mp); |
| 144 | fs = ump->um_fs; |
| 145 | if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0) |
| 146 | fs->fs_ronly = 0; |
| 147 | /* |
| 148 | * Verify that the specified device is the one that |
| 149 | * is really being used for the root file system. |
| 150 | */ |
| 151 | if (args.fspec == 0) |
| 152 | return (0); |
| 153 | if ((error = getmdev(&devvp, args.fspec, ndp, p)) != 0) |
| 154 | return (error); |
| 155 | if (devvp != ump->um_devvp) |
| 156 | error = EINVAL; /* needs translation */ |
| 157 | else |
| 158 | vrele(devvp); |
| 159 | } |
| 160 | if (error) { |
| 161 | vrele(devvp); |
| 162 | return (error); |
| 163 | } |
| 164 | ump = VFSTOUFS(mp); |
| 165 | fs = ump->um_fs; |
| 166 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); |
| 167 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); |
| 168 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
| 169 | MNAMELEN); |
| 170 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 171 | &size); |
| 172 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 173 | (void) ufs_statfs(mp, &mp->mnt_stat, p); |
| 174 | return (0); |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * Common code for mount and mountroot |
| 179 | */ |
| 180 | mountfs(devvp, mp, p) |
| 181 | register struct vnode *devvp; |
| 182 | struct mount *mp; |
| 183 | struct proc *p; |
| 184 | { |
| 185 | register struct ufsmount *ump = (struct ufsmount *)0; |
| 186 | struct buf *bp = NULL; |
| 187 | register struct fs *fs; |
| 188 | dev_t dev = devvp->v_rdev; |
| 189 | struct partinfo dpart; |
| 190 | int havepart = 0, blks; |
| 191 | caddr_t base, space; |
| 192 | int havepart = 0, blks; |
| 193 | int error, i, size; |
| 194 | int needclose = 0; |
| 195 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 196 | extern struct vnode *rootvp; |
| 197 | |
| 198 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p)) |
| 199 | return (error); |
| 200 | needclose = 1; |
| 201 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) |
| 202 | size = DEV_BSIZE; |
| 203 | else { |
| 204 | havepart = 1; |
| 205 | size = dpart.disklab->d_secsize; |
| 206 | } |
| 207 | if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) |
| 208 | goto out; |
| 209 | fs = bp->b_un.b_fs; |
| 210 | error = EINVAL; /* XXX needs translation */ |
| 211 | goto out; |
| 212 | } |
| 213 | ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK); |
| 214 | ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK, |
| 215 | M_WAITOK); |
| 216 | bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs, |
| 217 | (u_int)fs->fs_sbsize); |
| 218 | if (fs->fs_sbsize < SBSIZE) |
| 219 | bp->b_flags |= B_INVAL; |
| 220 | brelse(bp); |
| 221 | bp = NULL; |
| 222 | fs = ump->um_fs; |
| 223 | fs->fs_ronly = ronly; |
| 224 | if (ronly == 0) |
| 225 | fs->fs_fmod = 1; |
| 226 | if (havepart) { |
| 227 | dpart.part->p_fstype = FS_BSDFFS; |
| 228 | dpart.part->p_fsize = fs->fs_fsize; |
| 229 | dpart.part->p_frag = fs->fs_frag; |
| 230 | dpart.part->p_cpg = fs->fs_cpg; |
| 231 | } |
| 232 | #ifdef SECSIZE |
| 233 | /* |
| 234 | * If we have a disk label, force per-partition |
| 235 | * filesystem information to be correct |
| 236 | * and set correct current fsbtodb shift. |
| 237 | */ |
| 238 | #endif SECSIZE |
| 239 | if (havepart) { |
| 240 | dpart.part->p_fstype = FS_BSDFFS; |
| 241 | dpart.part->p_fsize = fs->fs_fsize; |
| 242 | dpart.part->p_frag = fs->fs_frag; |
| 243 | #ifdef SECSIZE |
| 244 | #ifdef tahoe |
| 245 | /* |
| 246 | * Save the original fsbtodb shift to restore on updates. |
| 247 | * (Console doesn't understand fsbtodb changes.) |
| 248 | */ |
| 249 | fs->fs_sparecon[0] = fs->fs_fsbtodb; |
| 250 | #endif |
| 251 | i = fs->fs_fsize / size; |
| 252 | for (fs->fs_fsbtodb = 0; i > 1; i >>= 1) |
| 253 | fs->fs_fsbtodb++; |
| 254 | #endif SECSIZE |
| 255 | fs->fs_dbsize = size; |
| 256 | } |
| 257 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 258 | base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK, |
| 259 | M_WAITOK); |
| 260 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 261 | size = fs->fs_bsize; |
| 262 | if (i + fs->fs_frag > blks) |
| 263 | size = (blks - i) * fs->fs_fsize; |
| 264 | #ifdef SECSIZE |
| 265 | tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 266 | fs->fs_dbsize); |
| 267 | #else SECSIZE |
| 268 | error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 269 | NOCRED, &bp); |
| 270 | if (error) { |
| 271 | free((caddr_t)base, M_SUPERBLK); |
| 272 | goto out; |
| 273 | } |
| 274 | bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size); |
| 275 | fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; |
| 276 | space += size; |
| 277 | brelse(bp); |
| 278 | bp = NULL; |
| 279 | } |
| 280 | mp->mnt_data = (qaddr_t)ump; |
| 281 | mp->mnt_stat.f_fsid.val[0] = (long)dev; |
| 282 | mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS; |
| 283 | mp->mnt_flag |= MNT_LOCAL; |
| 284 | ump->um_mountp = mp; |
| 285 | ump->um_dev = dev; |
| 286 | ump->um_devvp = devvp; |
| 287 | for (i = 0; i < MAXQUOTAS; i++) |
| 288 | ump->um_quotas[i] = NULLVP; |
| 289 | devvp->v_specflags |= SI_MOUNTEDON; |
| 290 | |
| 291 | /* Sanity checks for old file systems. XXX */ |
| 292 | fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */ |
| 293 | fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */ |
| 294 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 295 | fs->fs_nrpos = 8; /* XXX */ |
| 296 | |
| 297 | return (0); |
| 298 | out: |
| 299 | if (bp) |
| 300 | brelse(bp); |
| 301 | if (needclose) |
| 302 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); |
| 303 | if (ump) { |
| 304 | free((caddr_t)ump->um_fs, M_SUPERBLK); |
| 305 | free((caddr_t)ump, M_UFSMNT); |
| 306 | mp->mnt_data = (qaddr_t)0; |
| 307 | } |
| 308 | return (error); |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * Make a filesystem operational. |
| 313 | * Nothing to do at the moment. |
| 314 | */ |
| 315 | /* ARGSUSED */ |
| 316 | ufs_start(mp, flags, p) |
| 317 | struct mount *mp; |
| 318 | int flags; |
| 319 | struct proc *p; |
| 320 | { |
| 321 | |
| 322 | return (0); |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * unmount system call |
| 327 | */ |
| 328 | ufs_unmount(mp, mntflags, p) |
| 329 | struct mount *mp; |
| 330 | int mntflags; |
| 331 | struct proc *p; |
| 332 | { |
| 333 | register struct ufsmount *ump; |
| 334 | register struct fs *fs; |
| 335 | int i, error, ronly, flags = 0; |
| 336 | |
| 337 | if (mntflags & MNT_FORCE) { |
| 338 | if (!doforce || mp == rootfs) |
| 339 | return (EINVAL); |
| 340 | flags |= FORCECLOSE; |
| 341 | } |
| 342 | mntflushbuf(mp, 0); |
| 343 | if (mntinvalbuf(mp)) |
| 344 | return (EBUSY); |
| 345 | ump = VFSTOUFS(mp); |
| 346 | return (error); |
| 347 | #ifdef QUOTA |
| 348 | if (mp->mnt_flag & MNT_QUOTA) { |
| 349 | if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) |
| 350 | return (error); |
| 351 | for (i = 0; i < MAXQUOTAS; i++) { |
| 352 | if (ump->um_quotas[i] == NULLVP) |
| 353 | continue; |
| 354 | quotaoff(mp, i); |
| 355 | } |
| 356 | /* |
| 357 | * Here we fall through to vflush again to ensure |
| 358 | * that we have gotten rid of all the system vnodes. |
| 359 | */ |
| 360 | } |
| 361 | #endif |
| 362 | if (error = vflush(mp, NULLVP, flags)) |
| 363 | return (error); |
| 364 | fs = ump->um_fs; |
| 365 | ronly = !fs->fs_ronly; |
| 366 | error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE); |
| 367 | irele(ip); |
| 368 | return (error); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * Return root of a filesystem |
| 373 | */ |
| 374 | ufs_root(mp, vpp) |
| 375 | struct mount *mp; |
| 376 | struct vnode **vpp; |
| 377 | { |
| 378 | register struct inode *ip; |
| 379 | struct inode *nip; |
| 380 | struct vnode tvp; |
| 381 | int error; |
| 382 | |
| 383 | tvp.v_mount = mp; |
| 384 | ip = VTOI(&tvp); |
| 385 | ip->i_vnode = &tvp; |
| 386 | ip->i_dev = VFSTOUFS(mp)->um_dev; |
| 387 | error = iget(ip, (ino_t)ROOTINO, &nip); |
| 388 | if (error) |
| 389 | return (error); |
| 390 | *vpp = ITOV(nip); |
| 391 | return (0); |
| 392 | } |
| 393 | |
| 394 | /* |
| 395 | * Do operations associated with quotas |
| 396 | */ |
| 397 | ufs_quotactl(mp, cmds, uid, arg, p) |
| 398 | struct mount *mp; |
| 399 | int cmds; |
| 400 | uid_t uid; |
| 401 | caddr_t arg; |
| 402 | struct proc *p; |
| 403 | { |
| 404 | struct ufsmount *ump = VFSTOUFS(mp); |
| 405 | int cmd, type, error; |
| 406 | |
| 407 | #ifndef QUOTA |
| 408 | return (EOPNOTSUPP); |
| 409 | #else |
| 410 | if (uid == -1) |
| 411 | uid = p->p_cred->p_ruid; |
| 412 | cmd = cmds >> SUBCMDSHIFT; |
| 413 | |
| 414 | switch (cmd) { |
| 415 | case Q_GETQUOTA: |
| 416 | case Q_SYNC: |
| 417 | if (uid == p->p_cred->p_ruid) |
| 418 | break; |
| 419 | /* fall through */ |
| 420 | default: |
| 421 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 422 | return (error); |
| 423 | } |
| 424 | |
| 425 | type = cmd & SUBCMDMASK; |
| 426 | if ((u_int)type >= MAXQUOTAS) |
| 427 | return (EINVAL); |
| 428 | |
| 429 | switch (cmd) { |
| 430 | |
| 431 | case Q_QUOTAON: |
| 432 | return (quotaon(p, mp, type, arg)); |
| 433 | |
| 434 | case Q_QUOTAOFF: |
| 435 | if (vfs_busy(mp)) |
| 436 | return (0); |
| 437 | error = quotaoff(mp, type); |
| 438 | vfs_unbusy(mp); |
| 439 | return (error); |
| 440 | |
| 441 | case Q_SETQUOTA: |
| 442 | return (setquota(mp, uid, type, arg)); |
| 443 | |
| 444 | case Q_SETUSE: |
| 445 | return (setuse(mp, uid, type, arg)); |
| 446 | |
| 447 | case Q_GETQUOTA: |
| 448 | return (getquota(mp, uid, type, arg)); |
| 449 | |
| 450 | case Q_SYNC: |
| 451 | if (vfs_busy(mp)) |
| 452 | return (0); |
| 453 | error = qsync(mp); |
| 454 | vfs_unbusy(mp); |
| 455 | return (error); |
| 456 | |
| 457 | default: |
| 458 | return (EINVAL); |
| 459 | } |
| 460 | /* NOTREACHED */ |
| 461 | #endif |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Get file system statistics. |
| 466 | */ |
| 467 | ufs_statfs(mp, sbp, p) |
| 468 | struct mount *mp; |
| 469 | register struct statfs *sbp; |
| 470 | struct proc *p; |
| 471 | { |
| 472 | register struct ufsmount *ump; |
| 473 | register struct fs *fs; |
| 474 | |
| 475 | ump = VFSTOUFS(mp); |
| 476 | fs = ump->um_fs; |
| 477 | if (fs->fs_magic != FS_MAGIC) |
| 478 | panic("ufs_statfs"); |
| 479 | sbp->f_type = MOUNT_UFS; |
| 480 | sbp->f_fsize = fs->fs_fsize; |
| 481 | sbp->f_bsize = fs->fs_bsize; |
| 482 | sbp->f_blocks = fs->fs_dsize; |
| 483 | sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + |
| 484 | fs->fs_cstotal.cs_nffree; |
| 485 | sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - |
| 486 | (fs->fs_dsize - sbp->f_bfree); |
| 487 | sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; |
| 488 | sbp->f_ffree = fs->fs_cstotal.cs_nifree; |
| 489 | if (sbp != &mp->mnt_stat) { |
| 490 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, |
| 491 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
| 492 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
| 493 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
| 494 | } |
| 495 | return (0); |
| 496 | } |
| 497 | |
| 498 | int syncprt = 0; |
| 499 | |
| 500 | /* |
| 501 | * Go through the disk queues to initiate sandbagged IO; |
| 502 | * go through the inodes to write those that have been modified; |
| 503 | * initiate the writing of the super block if it has been modified. |
| 504 | * |
| 505 | * Note: we are always called with the filesystem marked `MPBUSY'. |
| 506 | */ |
| 507 | ufs_sync(mp, waitfor) |
| 508 | struct mount *mp; |
| 509 | int waitfor; |
| 510 | { |
| 511 | register struct vnode *vp; |
| 512 | register struct inode *ip; |
| 513 | register struct ufsmount *ump = VFSTOUFS(mp); |
| 514 | register struct fs *fs; |
| 515 | int error, allerror = 0; |
| 516 | |
| 517 | if (syncprt) |
| 518 | bufstats(); |
| 519 | fs = ump->um_fs; |
| 520 | /* |
| 521 | * Write back modified superblock. |
| 522 | * Consistency check that the superblock |
| 523 | * is still in the buffer cache. |
| 524 | */ |
| 525 | if (fs->fs_fmod != 0) { |
| 526 | if (fs->fs_ronly != 0) { /* XXX */ |
| 527 | printf("fs = %s\n", fs->fs_fsmnt); |
| 528 | panic("update: rofs mod"); |
| 529 | } |
| 530 | fs->fs_fmod = 0; |
| 531 | fs->fs_time = time.tv_sec; |
| 532 | allerror = sbupdate(ump, waitfor); |
| 533 | } |
| 534 | /* |
| 535 | * Write back each (modified) inode. |
| 536 | */ |
| 537 | loop: |
| 538 | for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) { |
| 539 | /* |
| 540 | * If the vnode that we are about to sync is no longer |
| 541 | * associated with this mount point, start over. |
| 542 | */ |
| 543 | if (vp->v_mount != mp) |
| 544 | goto loop; |
| 545 | if (VOP_ISLOCKED(vp)) |
| 546 | continue; |
| 547 | ip = VTOI(vp); |
| 548 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 && |
| 549 | vp->v_dirtyblkhd == NULL) |
| 550 | continue; |
| 551 | if (vget(vp)) |
| 552 | goto loop; |
| 553 | if (vp->v_dirtyblkhd) |
| 554 | vflushbuf(vp, 0); |
| 555 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) && |
| 556 | (error = iupdat(ip, &time, &time, 0))) |
| 557 | allerror = error; |
| 558 | vput(vp); |
| 559 | } |
| 560 | /* |
| 561 | * Force stale file system control information to be flushed. |
| 562 | */ |
| 563 | vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0); |
| 564 | #ifdef QUOTA |
| 565 | qsync(mp); |
| 566 | #endif |
| 567 | return (allerror); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Write a superblock and associated information back to disk. |
| 572 | */ |
| 573 | sbupdate(mp, waitfor) |
| 574 | struct ufsmount *mp; |
| 575 | int waitfor; |
| 576 | { |
| 577 | register struct fs *fs = mp->um_fs; |
| 578 | register struct buf *bp; |
| 579 | int blks; |
| 580 | caddr_t space; |
| 581 | int i, size, error = 0; |
| 582 | |
| 583 | #ifdef SECSIZE |
| 584 | bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize), |
| 585 | (int)fs->fs_sbsize, fs->fs_dbsize); |
| 586 | #else SECSIZE |
| 587 | bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize); |
| 588 | #endif SECSIZE |
| 589 | bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize); |
| 590 | /* Restore compatibility to old file systems. XXX */ |
| 591 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 592 | bp->b_un.b_fs->fs_nrpos = -1; /* XXX */ |
| 593 | #ifdef SECSIZE |
| 594 | #ifdef tahoe |
| 595 | /* restore standard fsbtodb shift */ |
| 596 | bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0]; |
| 597 | bp->b_un.b_fs->fs_sparecon[0] = 0; |
| 598 | #endif |
| 599 | #endif SECSIZE |
| 600 | if (waitfor == MNT_WAIT) |
| 601 | error = bwrite(bp); |
| 602 | else |
| 603 | bawrite(bp); |
| 604 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 605 | space = (caddr_t)fs->fs_csp[0]; |
| 606 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 607 | size = fs->fs_bsize; |
| 608 | if (i + fs->fs_frag > blks) |
| 609 | size = (blks - i) * fs->fs_fsize; |
| 610 | #ifdef SECSIZE |
| 611 | bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 612 | fs->fs_dbsize); |
| 613 | #else SECSIZE |
| 614 | bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size); |
| 615 | #endif SECSIZE |
| 616 | bcopy(space, bp->b_un.b_addr, (u_int)size); |
| 617 | space += size; |
| 618 | if (waitfor == MNT_WAIT) |
| 619 | error = bwrite(bp); |
| 620 | else |
| 621 | bawrite(bp); |
| 622 | } |
| 623 | return (error); |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * Print out statistics on the current allocation of the buffer pool. |
| 628 | * Can be enabled to print out on every ``sync'' by setting "syncprt" |
| 629 | * above. |
| 630 | */ |
| 631 | bufstats() |
| 632 | { |
| 633 | int s, i, j, count; |
| 634 | register struct buf *bp, *dp; |
| 635 | int counts[MAXBSIZE/CLBYTES+1]; |
| 636 | static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" }; |
| 637 | |
| 638 | for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) { |
| 639 | count = 0; |
| 640 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) |
| 641 | counts[j] = 0; |
| 642 | s = splbio(); |
| 643 | for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) { |
| 644 | counts[dp->b_bufsize/CLBYTES]++; |
| 645 | count++; |
| 646 | } |
| 647 | splx(s); |
| 648 | printf("%s: total-%d", bname[i], count); |
| 649 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) |
| 650 | if (counts[j] != 0) |
| 651 | printf(", %d-%d", j * CLBYTES, counts[j]); |
| 652 | printf("\n"); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | /* |
| 657 | * File handle to vnode |
| 658 | * |
| 659 | * Have to be really careful about stale file handles: |
| 660 | * - check that the inode number is in range |
| 661 | * - call iget() to get the locked inode |
| 662 | * - check for an unallocated inode (i_mode == 0) |
| 663 | * - check that the generation number matches |
| 664 | */ |
| 665 | ufs_fhtovp(mp, fhp, vpp) |
| 666 | register struct mount *mp; |
| 667 | struct fid *fhp; |
| 668 | struct vnode **vpp; |
| 669 | { |
| 670 | register struct ufid *ufhp; |
| 671 | register struct fs *fs; |
| 672 | register struct inode *ip; |
| 673 | struct inode *nip; |
| 674 | struct vnode tvp; |
| 675 | int error; |
| 676 | |
| 677 | ufhp = (struct ufid *)fhp; |
| 678 | fs = VFSTOUFS(mp)->um_fs; |
| 679 | if (ufhp->ufid_ino < ROOTINO || |
| 680 | ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) { |
| 681 | *vpp = NULLVP; |
| 682 | return (EINVAL); |
| 683 | } |
| 684 | tvp.v_mount = mp; |
| 685 | ip = VTOI(&tvp); |
| 686 | ip->i_vnode = &tvp; |
| 687 | ip->i_dev = VFSTOUFS(mp)->um_dev; |
| 688 | if (error = iget(ip, ufhp->ufid_ino, &nip)) { |
| 689 | *vpp = NULLVP; |
| 690 | return (error); |
| 691 | } |
| 692 | ip = nip; |
| 693 | if (ip->i_mode == 0) { |
| 694 | iput(ip); |
| 695 | *vpp = NULLVP; |
| 696 | return (EINVAL); |
| 697 | } |
| 698 | if (ip->i_gen != ufhp->ufid_gen) { |
| 699 | iput(ip); |
| 700 | *vpp = NULLVP; |
| 701 | return (EINVAL); |
| 702 | } |
| 703 | *vpp = ITOV(ip); |
| 704 | return (0); |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * Vnode pointer to File handle |
| 709 | */ |
| 710 | /* ARGSUSED */ |
| 711 | ufs_vptofh(vp, fhp) |
| 712 | struct vnode *vp; |
| 713 | struct fid *fhp; |
| 714 | { |
| 715 | register struct inode *ip = VTOI(vp); |
| 716 | register struct ufid *ufhp; |
| 717 | |
| 718 | ufhp = (struct ufid *)fhp; |
| 719 | ufhp->ufid_len = sizeof(struct ufid); |
| 720 | ufhp->ufid_ino = ip->i_number; |
| 721 | ufhp->ufid_gen = ip->i_gen; |
| 722 | return (0); |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Check that the user's argument is a reasonable |
| 727 | * thing on which to mount, and return the device number if so. |
| 728 | */ |
| 729 | getmdev(devvpp, fname, ndp, p) |
| 730 | struct vnode **devvpp; |
| 731 | caddr_t fname; |
| 732 | register struct nameidata *ndp; |
| 733 | struct proc *p; |
| 734 | { |
| 735 | register struct vnode *vp; |
| 736 | int error; |
| 737 | |
| 738 | ndp->ni_nameiop = LOOKUP | FOLLOW; |
| 739 | ndp->ni_segflg = UIO_USERSPACE; |
| 740 | ndp->ni_dirp = fname; |
| 741 | if (error = namei(ndp, p)) |
| 742 | return (error); |
| 743 | vp = ndp->ni_vp; |
| 744 | if (vp->v_type != VBLK) { |
| 745 | vrele(vp); |
| 746 | return (ENOTBLK); |
| 747 | } |
| 748 | if (major(vp->v_rdev) >= nblkdev) { |
| 749 | vrele(vp); |
| 750 | return (ENXIO); |
| 751 | } |
| 752 | *devvpp = vp; |
| 753 | return (0); |
| 754 | } |