| 1 | /* |
| 2 | * Copyright (c) 1989, 1991 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | * |
| 7 | * @(#)ffs_vfsops.c 7.72 (Berkeley) %G% |
| 8 | */ |
| 9 | |
| 10 | #include <sys/param.h> |
| 11 | #include <sys/systm.h> |
| 12 | #include <sys/namei.h> |
| 13 | #include <sys/proc.h> |
| 14 | #include <sys/kernel.h> |
| 15 | #include <sys/vnode.h> |
| 16 | #include <sys/specdev.h> |
| 17 | #include <sys/mount.h> |
| 18 | #include <sys/buf.h> |
| 19 | #include <sys/mbuf.h> |
| 20 | #include <sys/file.h> |
| 21 | #include <sys/disklabel.h> |
| 22 | #include <sys/ioctl.h> |
| 23 | #include <sys/errno.h> |
| 24 | #include <sys/malloc.h> |
| 25 | #include <sys/socket.h> |
| 26 | #include "ioctl.h" |
| 27 | #include "disklabel.h" |
| 28 | #include "stat.h" |
| 29 | |
| 30 | #include <ufs/ufs/quota.h> |
| 31 | #include <ufs/ufs/ufsmount.h> |
| 32 | #include <ufs/ufs/inode.h> |
| 33 | #include <ufs/ufs/ufs_extern.h> |
| 34 | |
| 35 | #include <ufs/ffs/fs.h> |
| 36 | #include <ufs/ffs/ffs_extern.h> |
| 37 | |
| 38 | int ffs_sbupdate __P((struct ufsmount *, int)); |
| 39 | |
| 40 | struct vfsops ufs_vfsops = { |
| 41 | ffs_mount, |
| 42 | ufs_start, |
| 43 | ffs_unmount, |
| 44 | ffs_root, |
| 45 | ufs_quotactl, |
| 46 | ffs_statfs, |
| 47 | ffs_sync, |
| 48 | ffs_vget, |
| 49 | ffs_fhtovp, |
| 50 | ffs_vptofh, |
| 51 | ffs_init, |
| 52 | }; |
| 53 | |
| 54 | extern u_long nextgennumber; |
| 55 | |
| 56 | /* |
| 57 | * Called by main() when ufs is going to be mounted as root. |
| 58 | * |
| 59 | * Name is updated by mount(8) after booting. |
| 60 | */ |
| 61 | #define ROOTNAME "root_device" |
| 62 | |
| 63 | ffs_mountroot() |
| 64 | { |
| 65 | extern struct vnode *rootvp; |
| 66 | register struct fs *fs; |
| 67 | register struct mount *mp; |
| 68 | struct proc *p = curproc; /* XXX */ |
| 69 | struct ufsmount *ump; |
| 70 | u_int size; |
| 71 | int error; |
| 72 | |
| 73 | mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); |
| 74 | bzero((char *)mp, (u_long)sizeof(struct mount)); |
| 75 | mp->mnt_op = &ufs_vfsops; |
| 76 | mp->mnt_flag = MNT_RDONLY; |
| 77 | if (error = ffs_mountfs(rootvp, mp, p)) { |
| 78 | free(mp, M_MOUNT); |
| 79 | return (error); |
| 80 | } |
| 81 | if (error = vfs_lock(mp)) { |
| 82 | (void)ffs_unmount(mp, 0, p); |
| 83 | free(mp, M_MOUNT); |
| 84 | return (error); |
| 85 | } |
| 86 | rootfs = mp; |
| 87 | mp->mnt_next = mp; |
| 88 | mp->mnt_prev = mp; |
| 89 | mp->mnt_vnodecovered = NULLVP; |
| 90 | ump = VFSTOUFS(mp); |
| 91 | fs = ump->um_fs; |
| 92 | bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); |
| 93 | fs->fs_fsmnt[0] = '/'; |
| 94 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
| 95 | MNAMELEN); |
| 96 | (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 97 | &size); |
| 98 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 99 | (void)ffs_statfs(mp, &mp->mnt_stat, p); |
| 100 | vfs_unlock(mp); |
| 101 | inittodr(fs->fs_time); |
| 102 | return (0); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * VFS Operations. |
| 107 | * |
| 108 | * mount system call |
| 109 | */ |
| 110 | int |
| 111 | ffs_mount(mp, path, data, ndp, p) |
| 112 | register struct mount *mp; |
| 113 | char *path; |
| 114 | caddr_t data; |
| 115 | struct nameidata *ndp; |
| 116 | struct proc *p; |
| 117 | { |
| 118 | struct vnode *devvp; |
| 119 | struct ufs_args args; |
| 120 | struct ufsmount *ump; |
| 121 | register struct fs *fs; |
| 122 | u_int size; |
| 123 | int error; |
| 124 | |
| 125 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) |
| 126 | return (error); |
| 127 | /* |
| 128 | * If updating, check whether changing from read-only to |
| 129 | * read/write; if there is no device name, that's all we do. |
| 130 | */ |
| 131 | if (mp->mnt_flag & MNT_UPDATE) { |
| 132 | ump = VFSTOUFS(mp); |
| 133 | fs = ump->um_fs; |
| 134 | if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0) |
| 135 | fs->fs_ronly = 0; |
| 136 | if (args.fspec == 0) { |
| 137 | /* |
| 138 | * Process export requests. |
| 139 | */ |
| 140 | if (args.exflags & MNT_EXPORTED) { |
| 141 | if (error = ufs_hang_addrlist(mp, &args)) |
| 142 | return (error); |
| 143 | mp->mnt_flag |= MNT_EXPORTED; |
| 144 | } |
| 145 | if (args.exflags & MNT_DELEXPORT) { |
| 146 | ufs_free_addrlist(ump); |
| 147 | mp->mnt_flag &= |
| 148 | ~(MNT_EXPORTED | MNT_DEFEXPORTED); |
| 149 | } |
| 150 | return (0); |
| 151 | } |
| 152 | } |
| 153 | /* |
| 154 | * Not an update, or updating the name: look up the name |
| 155 | * and verify that it refers to a sensible block device. |
| 156 | */ |
| 157 | NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); |
| 158 | if (error = namei(ndp)) |
| 159 | return (error); |
| 160 | devvp = ndp->ni_vp; |
| 161 | |
| 162 | if (devvp->v_type != VBLK) { |
| 163 | vrele(devvp); |
| 164 | return (ENOTBLK); |
| 165 | } |
| 166 | if (major(devvp->v_rdev) >= nblkdev) { |
| 167 | vrele(devvp); |
| 168 | return (ENXIO); |
| 169 | } |
| 170 | if ((mp->mnt_flag & MNT_UPDATE) == 0) |
| 171 | error = ffs_mountfs(devvp, mp, p); |
| 172 | else { |
| 173 | if (devvp != ump->um_devvp) |
| 174 | error = EINVAL; /* needs translation */ |
| 175 | else |
| 176 | vrele(devvp); |
| 177 | } |
| 178 | if (error) { |
| 179 | vrele(devvp); |
| 180 | return (error); |
| 181 | } |
| 182 | ump = VFSTOUFS(mp); |
| 183 | fs = ump->um_fs; |
| 184 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); |
| 185 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); |
| 186 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
| 187 | MNAMELEN); |
| 188 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 189 | &size); |
| 190 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 191 | (void)ffs_statfs(mp, &mp->mnt_stat, p); |
| 192 | return (0); |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Common code for mount and mountroot |
| 197 | */ |
| 198 | int |
| 199 | ffs_mountfs(devvp, mp, p) |
| 200 | register struct vnode *devvp; |
| 201 | struct mount *mp; |
| 202 | struct proc *p; |
| 203 | { |
| 204 | register struct ufsmount *ump; |
| 205 | struct buf *bp; |
| 206 | register struct fs *fs; |
| 207 | dev_t dev = devvp->v_rdev; |
| 208 | struct partinfo dpart; |
| 209 | int havepart = 0, blks; |
| 210 | caddr_t base, space; |
| 211 | int havepart = 0, blks; |
| 212 | int error, i, size; |
| 213 | int ronly; |
| 214 | extern struct vnode *rootvp; |
| 215 | |
| 216 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p)) |
| 217 | return (error); |
| 218 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) |
| 219 | size = DEV_BSIZE; |
| 220 | else { |
| 221 | havepart = 1; |
| 222 | size = dpart.disklab->d_secsize; |
| 223 | } |
| 224 | |
| 225 | bp = NULL; |
| 226 | ump = NULL; |
| 227 | if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) |
| 228 | goto out; |
| 229 | fs = bp->b_un.b_fs; |
| 230 | error = EINVAL; /* XXX needs translation */ |
| 231 | goto out; |
| 232 | } |
| 233 | ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); |
| 234 | bzero((caddr_t)ump, sizeof *ump); |
| 235 | ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, |
| 236 | M_WAITOK); |
| 237 | bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs, |
| 238 | (u_int)fs->fs_sbsize); |
| 239 | if (fs->fs_sbsize < SBSIZE) |
| 240 | bp->b_flags |= B_INVAL; |
| 241 | brelse(bp); |
| 242 | bp = NULL; |
| 243 | fs = ump->um_fs; |
| 244 | fs->fs_ronly = ronly; |
| 245 | if (ronly == 0) |
| 246 | fs->fs_fmod = 1; |
| 247 | if (havepart) { |
| 248 | dpart.part->p_fstype = FS_BSDFFS; |
| 249 | dpart.part->p_fsize = fs->fs_fsize; |
| 250 | dpart.part->p_frag = fs->fs_frag; |
| 251 | dpart.part->p_cpg = fs->fs_cpg; |
| 252 | } |
| 253 | #ifdef SECSIZE |
| 254 | /* |
| 255 | * If we have a disk label, force per-partition |
| 256 | * filesystem information to be correct |
| 257 | * and set correct current fsbtodb shift. |
| 258 | */ |
| 259 | #endif SECSIZE |
| 260 | if (havepart) { |
| 261 | dpart.part->p_fstype = FS_BSDFFS; |
| 262 | dpart.part->p_fsize = fs->fs_fsize; |
| 263 | dpart.part->p_frag = fs->fs_frag; |
| 264 | #ifdef SECSIZE |
| 265 | #ifdef tahoe |
| 266 | /* |
| 267 | * Save the original fsbtodb shift to restore on updates. |
| 268 | * (Console doesn't understand fsbtodb changes.) |
| 269 | */ |
| 270 | fs->fs_sparecon[0] = fs->fs_fsbtodb; |
| 271 | #endif |
| 272 | i = fs->fs_fsize / size; |
| 273 | for (fs->fs_fsbtodb = 0; i > 1; i >>= 1) |
| 274 | fs->fs_fsbtodb++; |
| 275 | #endif SECSIZE |
| 276 | fs->fs_dbsize = size; |
| 277 | } |
| 278 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 279 | base = space = malloc((u_long)fs->fs_cssize, M_UFSMNT, |
| 280 | M_WAITOK); |
| 281 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 282 | size = fs->fs_bsize; |
| 283 | if (i + fs->fs_frag > blks) |
| 284 | size = (blks - i) * fs->fs_fsize; |
| 285 | #ifdef SECSIZE |
| 286 | tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 287 | fs->fs_dbsize); |
| 288 | #else SECSIZE |
| 289 | error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 290 | NOCRED, &bp); |
| 291 | if (error) { |
| 292 | free(base, M_UFSMNT); |
| 293 | goto out; |
| 294 | } |
| 295 | bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size); |
| 296 | fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; |
| 297 | space += size; |
| 298 | brelse(bp); |
| 299 | bp = NULL; |
| 300 | } |
| 301 | mp->mnt_data = (qaddr_t)ump; |
| 302 | mp->mnt_stat.f_fsid.val[0] = (long)dev; |
| 303 | mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS; |
| 304 | mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; |
| 305 | mp->mnt_flag |= MNT_LOCAL; |
| 306 | ump->um_mountp = mp; |
| 307 | ump->um_dev = dev; |
| 308 | ump->um_devvp = devvp; |
| 309 | for (i = 0; i < MAXQUOTAS; i++) |
| 310 | ump->um_quotas[i] = NULLVP; |
| 311 | devvp->v_specflags |= SI_MOUNTEDON; |
| 312 | |
| 313 | /* Sanity checks for old file systems. XXX */ |
| 314 | fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */ |
| 315 | fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */ |
| 316 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 317 | fs->fs_nrpos = 8; /* XXX */ |
| 318 | if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ |
| 319 | quad_t sizepb = fs->fs_bsize; /* XXX */ |
| 320 | /* XXX */ |
| 321 | fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ |
| 322 | for (i = 0; i < NIADDR; i++) { /* XXX */ |
| 323 | sizepb *= NINDIR(fs); /* XXX */ |
| 324 | fs->fs_maxfilesize += sizepb; /* XXX */ |
| 325 | } /* XXX */ |
| 326 | fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ |
| 327 | fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ |
| 328 | } /* XXX */ |
| 329 | |
| 330 | return (0); |
| 331 | out: |
| 332 | if (bp) |
| 333 | brelse(bp); |
| 334 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); |
| 335 | if (ump) { |
| 336 | free(ump->um_fs, M_UFSMNT); |
| 337 | free(ump, M_UFSMNT); |
| 338 | mp->mnt_data = (qaddr_t)0; |
| 339 | } |
| 340 | return (error); |
| 341 | } |
| 342 | |
| 343 | /* |
| 344 | * unmount system call |
| 345 | */ |
| 346 | int |
| 347 | ffs_unmount(mp, mntflags, p) |
| 348 | struct mount *mp; |
| 349 | int mntflags; |
| 350 | struct proc *p; |
| 351 | { |
| 352 | extern int doforce; |
| 353 | register struct ufsmount *ump; |
| 354 | register struct fs *fs; |
| 355 | int i, error, flags, ronly; |
| 356 | |
| 357 | flags = 0; |
| 358 | if (mntflags & MNT_FORCE) { |
| 359 | if (!doforce || mp == rootfs) |
| 360 | return (EINVAL); |
| 361 | flags |= FORCECLOSE; |
| 362 | } |
| 363 | ump = VFSTOUFS(mp); |
| 364 | return (error); |
| 365 | #ifdef QUOTA |
| 366 | if (mp->mnt_flag & MNT_QUOTA) { |
| 367 | if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) |
| 368 | return (error); |
| 369 | for (i = 0; i < MAXQUOTAS; i++) { |
| 370 | if (ump->um_quotas[i] == NULLVP) |
| 371 | continue; |
| 372 | quotaoff(p, mp, i); |
| 373 | } |
| 374 | /* |
| 375 | * Here we fall through to vflush again to ensure |
| 376 | * that we have gotten rid of all the system vnodes. |
| 377 | */ |
| 378 | } |
| 379 | #endif |
| 380 | if (error = vflush(mp, NULLVP, flags)) |
| 381 | return (error); |
| 382 | fs = ump->um_fs; |
| 383 | ronly = !fs->fs_ronly; |
| 384 | * Get file system statistics. |
| 385 | */ |
| 386 | int |
| 387 | ffs_statfs(mp, sbp, p) |
| 388 | struct mount *mp; |
| 389 | register struct statfs *sbp; |
| 390 | struct proc *p; |
| 391 | { |
| 392 | register struct ufsmount *ump; |
| 393 | register struct fs *fs; |
| 394 | |
| 395 | ump = VFSTOUFS(mp); |
| 396 | fs = ump->um_fs; |
| 397 | if (fs->fs_magic != FS_MAGIC) |
| 398 | panic("ffs_statfs"); |
| 399 | sbp->f_type = MOUNT_UFS; |
| 400 | sbp->f_bsize = fs->fs_fsize; |
| 401 | sbp->f_iosize = fs->fs_bsize; |
| 402 | sbp->f_blocks = fs->fs_dsize; |
| 403 | sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + |
| 404 | fs->fs_cstotal.cs_nffree; |
| 405 | sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - |
| 406 | (fs->fs_dsize - sbp->f_bfree); |
| 407 | sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; |
| 408 | sbp->f_ffree = fs->fs_cstotal.cs_nifree; |
| 409 | if (sbp != &mp->mnt_stat) { |
| 410 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, |
| 411 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
| 412 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
| 413 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
| 414 | } |
| 415 | return (0); |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Go through the disk queues to initiate sandbagged IO; |
| 420 | * go through the inodes to write those that have been modified; |
| 421 | * initiate the writing of the super block if it has been modified. |
| 422 | * |
| 423 | * Note: we are always called with the filesystem marked `MPBUSY'. |
| 424 | */ |
| 425 | int |
| 426 | ffs_sync(mp, waitfor, cred, p) |
| 427 | struct mount *mp; |
| 428 | int waitfor; |
| 429 | struct ucred *cred; |
| 430 | struct proc *p; |
| 431 | { |
| 432 | extern int syncprt; |
| 433 | register struct vnode *vp; |
| 434 | register struct inode *ip; |
| 435 | register struct ufsmount *ump = VFSTOUFS(mp); |
| 436 | register struct fs *fs; |
| 437 | int error, allerror = 0; |
| 438 | |
| 439 | if (syncprt) |
| 440 | ufs_bufstats(); |
| 441 | fs = ump->um_fs; |
| 442 | /* |
| 443 | * Write back modified superblock. |
| 444 | * Consistency check that the superblock |
| 445 | * is still in the buffer cache. |
| 446 | */ |
| 447 | if (fs->fs_fmod != 0) { |
| 448 | if (fs->fs_ronly != 0) { /* XXX */ |
| 449 | printf("fs = %s\n", fs->fs_fsmnt); |
| 450 | panic("update: rofs mod"); |
| 451 | } |
| 452 | fs->fs_fmod = 0; |
| 453 | fs->fs_time = time.tv_sec; |
| 454 | allerror = ffs_sbupdate(ump, waitfor); |
| 455 | } |
| 456 | /* |
| 457 | * Write back each (modified) inode. |
| 458 | */ |
| 459 | loop: |
| 460 | for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) { |
| 461 | /* |
| 462 | * If the vnode that we are about to sync is no longer |
| 463 | * associated with this mount point, start over. |
| 464 | */ |
| 465 | if (vp->v_mount != mp) |
| 466 | goto loop; |
| 467 | if (VOP_ISLOCKED(vp)) |
| 468 | continue; |
| 469 | ip = VTOI(vp); |
| 470 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 && |
| 471 | vp->v_dirtyblkhd == NULL) |
| 472 | continue; |
| 473 | if (vget(vp)) |
| 474 | goto loop; |
| 475 | if (error = VOP_FSYNC(vp, cred, waitfor, p)) |
| 476 | allerror = error; |
| 477 | vput(vp); |
| 478 | } |
| 479 | /* |
| 480 | * Force stale file system control information to be flushed. |
| 481 | */ |
| 482 | if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) |
| 483 | allerror = error; |
| 484 | #ifdef QUOTA |
| 485 | qsync(mp); |
| 486 | #endif |
| 487 | return (allerror); |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * Look up a FFS dinode number to find its incore vnode. |
| 492 | * If it is not in core, read it in from the specified device. |
| 493 | * If it is in core, wait for the lock bit to clear, then |
| 494 | * return the inode locked. Detection and handling of mount |
| 495 | * points must be done by the calling routine. |
| 496 | */ |
| 497 | int |
| 498 | ffs_vget(mp, ino, vpp) |
| 499 | struct mount *mp; |
| 500 | ino_t ino; |
| 501 | struct vnode **vpp; |
| 502 | { |
| 503 | register struct fs *fs; |
| 504 | register struct inode *ip; |
| 505 | struct ufsmount *ump; |
| 506 | struct buf *bp; |
| 507 | struct dinode *dp; |
| 508 | struct vnode *vp; |
| 509 | union ihead *ih; |
| 510 | dev_t dev; |
| 511 | int i, type, error; |
| 512 | |
| 513 | ump = VFSTOUFS(mp); |
| 514 | dev = ump->um_dev; |
| 515 | if ((*vpp = ufs_ihashget(dev, ino)) != NULL) |
| 516 | return (0); |
| 517 | |
| 518 | /* Allocate a new vnode/inode. */ |
| 519 | if (error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) { |
| 520 | *vpp = NULL; |
| 521 | return (error); |
| 522 | } |
| 523 | type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */ |
| 524 | MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK); |
| 525 | vp->v_data = ip; |
| 526 | ip->i_vnode = vp; |
| 527 | ip->i_flag = 0; |
| 528 | ip->i_devvp = 0; |
| 529 | ip->i_mode = 0; |
| 530 | ip->i_diroff = 0; |
| 531 | ip->i_lockf = 0; |
| 532 | ip->i_fs = fs = ump->um_fs; |
| 533 | ip->i_dev = dev; |
| 534 | ip->i_number = ino; |
| 535 | #ifdef QUOTA |
| 536 | for (i = 0; i < MAXQUOTAS; i++) |
| 537 | ip->i_dquot[i] = NODQUOT; |
| 538 | #endif |
| 539 | /* |
| 540 | * Put it onto its hash chain and lock it so that other requests for |
| 541 | * this inode will block if they arrive while we are sleeping waiting |
| 542 | * for old data structures to be purged or for the contents of the |
| 543 | * disk portion of this inode to be read. |
| 544 | */ |
| 545 | ufs_ihashins(ip); |
| 546 | |
| 547 | /* Read in the disk contents for the inode, copy into the inode. */ |
| 548 | if (error = bread(ump->um_devvp, fsbtodb(fs, itod(fs, ino)), |
| 549 | (int)fs->fs_bsize, NOCRED, &bp)) { |
| 550 | /* |
| 551 | * The inode does not contain anything useful, so it would |
| 552 | * be misleading to leave it on its hash chain. It will be |
| 553 | * returned to the free list by ufs_iput(). |
| 554 | */ |
| 555 | remque(ip); |
| 556 | ip->i_forw = ip; |
| 557 | ip->i_back = ip; |
| 558 | |
| 559 | /* Unlock and discard unneeded inode. */ |
| 560 | ufs_iput(ip); |
| 561 | brelse(bp); |
| 562 | *vpp = NULL; |
| 563 | return (error); |
| 564 | } |
| 565 | dp = bp->b_un.b_dino; |
| 566 | dp += itoo(fs, ino); |
| 567 | ip->i_din = *dp; |
| 568 | brelse(bp); |
| 569 | |
| 570 | /* |
| 571 | * Initialize the vnode from the inode, check for aliases. |
| 572 | * Note that the underlying vnode may have changed. |
| 573 | */ |
| 574 | if (error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp)) { |
| 575 | ufs_iput(ip); |
| 576 | *vpp = NULL; |
| 577 | return (error); |
| 578 | } |
| 579 | /* |
| 580 | * Finish inode initialization now that aliasing has been resolved. |
| 581 | */ |
| 582 | ip->i_devvp = ump->um_devvp; |
| 583 | VREF(ip->i_devvp); |
| 584 | /* |
| 585 | * Set up a generation number for this inode if it does not |
| 586 | * already have one. This should only happen on old filesystems. |
| 587 | */ |
| 588 | if (ip->i_gen == 0) { |
| 589 | if (++nextgennumber < (u_long)time.tv_sec) |
| 590 | nextgennumber = time.tv_sec; |
| 591 | ip->i_gen = nextgennumber; |
| 592 | if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) |
| 593 | ip->i_flag |= IMOD; |
| 594 | } |
| 595 | /* |
| 596 | * Ensure that uid and gid are correct. This is a temporary |
| 597 | * fix until fsck has been changed to do the update. |
| 598 | */ |
| 599 | if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ |
| 600 | ip->i_uid = ip->i_din.di_ouid; /* XXX */ |
| 601 | ip->i_gid = ip->i_din.di_ogid; /* XXX */ |
| 602 | } /* XXX */ |
| 603 | |
| 604 | *vpp = vp; |
| 605 | return (0); |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * File handle to vnode |
| 610 | * |
| 611 | * Have to be really careful about stale file handles: |
| 612 | * - check that the inode number is valid |
| 613 | * - call ffs_vget() to get the locked inode |
| 614 | * - check for an unallocated inode (i_mode == 0) |
| 615 | * - check that the given client host has export rights and return |
| 616 | * those rights via. exflagsp and credanonp |
| 617 | */ |
| 618 | int |
| 619 | ffs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) |
| 620 | register struct mount *mp; |
| 621 | struct fid *fhp; |
| 622 | struct mbuf *nam; |
| 623 | struct vnode **vpp; |
| 624 | int *exflagsp; |
| 625 | struct ucred **credanonp; |
| 626 | { |
| 627 | register struct inode *ip; |
| 628 | register struct ufid *ufhp; |
| 629 | register struct netaddrhash *np; |
| 630 | register struct ufsmount *ump = VFSTOUFS(mp); |
| 631 | struct fs *fs; |
| 632 | struct vnode *nvp; |
| 633 | struct sockaddr *saddr; |
| 634 | int error; |
| 635 | |
| 636 | ufhp = (struct ufid *)fhp; |
| 637 | fs = ump->um_fs; |
| 638 | if (ufhp->ufid_ino < ROOTINO || |
| 639 | ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) |
| 640 | return (ESTALE); |
| 641 | /* |
| 642 | * Get the export permission structure for this <mp, client> tuple. |
| 643 | */ |
| 644 | if ((mp->mnt_flag & MNT_EXPORTED) == 0) |
| 645 | return (EACCES); |
| 646 | if (nam == NULL) { |
| 647 | np = (struct netaddrhash *)0; |
| 648 | } else { |
| 649 | /* |
| 650 | * First search for a network match. |
| 651 | */ |
| 652 | np = ump->um_netaddr[NETMASK_HASH]; |
| 653 | while (np) { |
| 654 | if (netaddr_match(np->neth_family, &np->neth_haddr, |
| 655 | &np->neth_hmask, nam)) |
| 656 | break; |
| 657 | np = np->neth_next; |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * If not found, try for an address match. |
| 662 | */ |
| 663 | if (np == (struct netaddrhash *)0) { |
| 664 | saddr = mtod(nam, struct sockaddr *); |
| 665 | np = ump->um_netaddr[NETADDRHASH(saddr)]; |
| 666 | while (np) { |
| 667 | if (netaddr_match(np->neth_family, |
| 668 | &np->neth_haddr, (struct netaddrhash *)0, |
| 669 | nam)) |
| 670 | break; |
| 671 | np = np->neth_next; |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | if (np == (struct netaddrhash *)0) { |
| 676 | /* |
| 677 | * If no address match, use the default if it exists. |
| 678 | */ |
| 679 | if ((mp->mnt_flag & MNT_DEFEXPORTED) == 0) |
| 680 | return (EACCES); |
| 681 | np = &ump->um_defexported; |
| 682 | } |
| 683 | if (error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) { |
| 684 | *vpp = NULLVP; |
| 685 | return (error); |
| 686 | } |
| 687 | ip = VTOI(nvp); |
| 688 | if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen) { |
| 689 | ufs_iput(ip); |
| 690 | *vpp = NULLVP; |
| 691 | return (ESTALE); |
| 692 | } |
| 693 | *vpp = nvp; |
| 694 | *exflagsp = np->neth_exflags; |
| 695 | *credanonp = &np->neth_anon; |
| 696 | return (0); |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * Vnode pointer to File handle |
| 701 | */ |
| 702 | /* ARGSUSED */ |
| 703 | ffs_vptofh(vp, fhp) |
| 704 | struct vnode *vp; |
| 705 | struct fid *fhp; |
| 706 | { |
| 707 | register struct inode *ip; |
| 708 | register struct ufid *ufhp; |
| 709 | |
| 710 | ip = VTOI(vp); |
| 711 | ufhp = (struct ufid *)fhp; |
| 712 | ufhp->ufid_len = sizeof(struct ufid); |
| 713 | ufhp->ufid_ino = ip->i_number; |
| 714 | ufhp->ufid_gen = ip->i_gen; |
| 715 | return (0); |
| 716 | } |
| 717 | |
| 718 | /* |
| 719 | * Write a superblock and associated information back to disk. |
| 720 | */ |
| 721 | int |
| 722 | ffs_sbupdate(mp, waitfor) |
| 723 | struct ufsmount *mp; |
| 724 | int waitfor; |
| 725 | { |
| 726 | register struct fs *fs = mp->um_fs; |
| 727 | register struct buf *bp; |
| 728 | int blks; |
| 729 | caddr_t space; |
| 730 | int i, size, error = 0; |
| 731 | |
| 732 | #ifdef SECSIZE |
| 733 | bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize), |
| 734 | (int)fs->fs_sbsize, fs->fs_dbsize); |
| 735 | #else SECSIZE |
| 736 | bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize); |
| 737 | #endif SECSIZE |
| 738 | bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize); |
| 739 | /* Restore compatibility to old file systems. XXX */ |
| 740 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
| 741 | bp->b_un.b_fs->fs_nrpos = -1; /* XXX */ |
| 742 | #ifdef SECSIZE |
| 743 | #ifdef tahoe |
| 744 | /* restore standard fsbtodb shift */ |
| 745 | bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0]; |
| 746 | bp->b_un.b_fs->fs_sparecon[0] = 0; |
| 747 | #endif |
| 748 | #endif SECSIZE |
| 749 | if (waitfor == MNT_WAIT) |
| 750 | error = bwrite(bp); |
| 751 | else |
| 752 | bawrite(bp); |
| 753 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
| 754 | space = (caddr_t)fs->fs_csp[0]; |
| 755 | for (i = 0; i < blks; i += fs->fs_frag) { |
| 756 | size = fs->fs_bsize; |
| 757 | if (i + fs->fs_frag > blks) |
| 758 | size = (blks - i) * fs->fs_fsize; |
| 759 | #ifdef SECSIZE |
| 760 | bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size, |
| 761 | fs->fs_dbsize); |
| 762 | #else SECSIZE |
| 763 | bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size); |
| 764 | #endif SECSIZE |
| 765 | bcopy(space, bp->b_un.b_addr, (u_int)size); |
| 766 | space += size; |
| 767 | if (waitfor == MNT_WAIT) |
| 768 | error = bwrite(bp); |
| 769 | else |
| 770 | bawrite(bp); |
| 771 | } |
| 772 | return (error); |
| 773 | } |