Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
52ff95c2 | 2 | * Copyright (c) 1989, 1991, 1993, 1994 |
ad0f93d2 | 3 | * The Regents of the University of California. All rights reserved. |
da7c5cc6 | 4 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
38047d55 | 7 | * @(#)lfs_vfsops.c 8.9 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
71e4e98b | 9 | |
c7e94c3a KB |
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> | |
c7e94c3a KB |
16 | #include <sys/mount.h> |
17 | #include <sys/buf.h> | |
3a0a9bdc | 18 | #include <sys/mbuf.h> |
c7e94c3a KB |
19 | #include <sys/file.h> |
20 | #include <sys/disklabel.h> | |
21 | #include <sys/ioctl.h> | |
22 | #include <sys/errno.h> | |
23 | #include <sys/malloc.h> | |
3a0a9bdc | 24 | #include <sys/socket.h> |
cff1d696 KM |
25 | |
26 | #include <miscfs/specfs/specdev.h> | |
609e7cfa MK |
27 | #include "ioctl.h" |
28 | #include "disklabel.h" | |
29 | #include "stat.h" | |
71e4e98b | 30 | |
d9f5f868 KB |
31 | #include <ufs/ufs/quota.h> |
32 | #include <ufs/ufs/inode.h> | |
33 | #include <ufs/ufs/ufsmount.h> | |
34 | #include <ufs/ufs/ufs_extern.h> | |
c6f5111d | 35 | |
d9f5f868 KB |
36 | #include <ufs/lfs/lfs.h> |
37 | #include <ufs/lfs/lfs_extern.h> | |
275ca4f0 | 38 | |
79a0d4bf | 39 | int lfs_mountfs __P((struct vnode *, struct mount *, struct proc *)); |
0b4d6502 KB |
40 | |
41 | struct vfsops lfs_vfsops = { | |
42 | lfs_mount, | |
5bf9d21f | 43 | ufs_start, |
0b4d6502 | 44 | lfs_unmount, |
52ff95c2 | 45 | ufs_root, |
8dc876c1 | 46 | ufs_quotactl, |
0b4d6502 KB |
47 | lfs_statfs, |
48 | lfs_sync, | |
f7802306 | 49 | lfs_vget, |
b16ed5f4 KM |
50 | lfs_fhtovp, |
51 | lfs_vptofh, | |
c7e94c3a | 52 | lfs_init, |
7188ac27 KM |
53 | }; |
54 | ||
c7e94c3a | 55 | int |
0b4d6502 | 56 | lfs_mountroot() |
71e4e98b | 57 | { |
c7e94c3a | 58 | panic("lfs_mountroot"); /* XXX -- implement */ |
7188ac27 KM |
59 | } |
60 | ||
61 | /* | |
62 | * VFS Operations. | |
63 | * | |
64 | * mount system call | |
65 | */ | |
0b4d6502 | 66 | lfs_mount(mp, path, data, ndp, p) |
d45de50d | 67 | register struct mount *mp; |
7188ac27 KM |
68 | char *path; |
69 | caddr_t data; | |
70 | struct nameidata *ndp; | |
0eb6f54a | 71 | struct proc *p; |
7188ac27 KM |
72 | { |
73 | struct vnode *devvp; | |
74 | struct ufs_args args; | |
75 | struct ufsmount *ump; | |
d9f5f868 | 76 | register struct lfs *fs; /* LFS */ |
7188ac27 KM |
77 | u_int size; |
78 | int error; | |
38047d55 | 79 | mode_t accessmode; |
7188ac27 KM |
80 | |
81 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) | |
82 | return (error); | |
c7e94c3a KB |
83 | |
84 | /* Until LFS can do NFS right. XXX */ | |
ea7e18a7 | 85 | if (args.export.ex_flags & MNT_EXPORTED) |
c7e94c3a | 86 | return (EINVAL); |
ea7e18a7 | 87 | |
190244fb MK |
88 | /* |
89 | * If updating, check whether changing from read-only to | |
90 | * read/write; if there is no device name, that's all we do. | |
91 | */ | |
92 | if (mp->mnt_flag & MNT_UPDATE) { | |
d48157d5 | 93 | ump = VFSTOUFS(mp); |
38047d55 KM |
94 | if (fs->lfs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) { |
95 | /* | |
96 | * If upgrade to read-write by non-root, then verify | |
97 | * that user has necessary permissions on the device. | |
98 | */ | |
99 | if (p->p_ucred->cr_uid != 0) { | |
100 | VOP_LOCK(ump->um_devvp); | |
101 | if (error = VOP_ACCESS(ump->um_devvp, | |
102 | VREAD | VWRITE, p->p_ucred, p)) { | |
103 | VOP_UNLOCK(ump->um_devvp); | |
104 | return (error); | |
105 | } | |
106 | VOP_UNLOCK(ump->um_devvp); | |
107 | } | |
0b4d6502 | 108 | fs->lfs_ronly = 0; |
38047d55 | 109 | } |
64583792 KM |
110 | if (args.fspec == 0) { |
111 | /* | |
112 | * Process export requests. | |
113 | */ | |
ea7e18a7 | 114 | return (vfs_export(mp, &ump->um_export, &args.export)); |
64583792 | 115 | } |
190244fb MK |
116 | } |
117 | /* | |
118 | * Not an update, or updating the name: look up the name | |
119 | * and verify that it refers to a sensible block device. | |
120 | */ | |
995e59df KM |
121 | NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); |
122 | if (error = namei(ndp)) | |
190244fb MK |
123 | return (error); |
124 | devvp = ndp->ni_vp; | |
125 | if (devvp->v_type != VBLK) { | |
126 | vrele(devvp); | |
127 | return (ENOTBLK); | |
128 | } | |
129 | if (major(devvp->v_rdev) >= nblkdev) { | |
130 | vrele(devvp); | |
131 | return (ENXIO); | |
132 | } | |
38047d55 KM |
133 | /* |
134 | * If mount by non-root, then verify that user has necessary | |
135 | * permissions on the device. | |
136 | */ | |
137 | if (p->p_ucred->cr_uid != 0) { | |
138 | accessmode = VREAD; | |
139 | if ((mp->mnt_flag & MNT_RDONLY) == 0) | |
140 | accessmode |= VWRITE; | |
141 | VOP_LOCK(devvp); | |
142 | if (error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) { | |
143 | vput(devvp); | |
144 | return (error); | |
145 | } | |
146 | VOP_UNLOCK(devvp); | |
147 | } | |
190244fb | 148 | if ((mp->mnt_flag & MNT_UPDATE) == 0) |
0b4d6502 | 149 | error = lfs_mountfs(devvp, mp, p); /* LFS */ |
190244fb | 150 | else { |
d48157d5 KM |
151 | if (devvp != ump->um_devvp) |
152 | error = EINVAL; /* needs translation */ | |
2a7dbb09 KM |
153 | else |
154 | vrele(devvp); | |
d48157d5 | 155 | } |
7188ac27 KM |
156 | if (error) { |
157 | vrele(devvp); | |
158 | return (error); | |
27d00e76 | 159 | } |
7188ac27 | 160 | ump = VFSTOUFS(mp); |
0b4d6502 KB |
161 | fs = ump->um_lfs; /* LFS */ |
162 | #ifdef NOTLFS /* LFS */ | |
7188ac27 KM |
163 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); |
164 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); | |
82161bc8 KM |
165 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
166 | MNAMELEN); | |
79a0d4bf | 167 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
82161bc8 KM |
168 | &size); |
169 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); | |
0eb6f54a | 170 | (void) ufs_statfs(mp, &mp->mnt_stat, p); |
0b4d6502 KB |
171 | #else |
172 | (void)copyinstr(path, fs->lfs_fsmnt, sizeof(fs->lfs_fsmnt) - 1, &size); | |
173 | bzero(fs->lfs_fsmnt + size, sizeof(fs->lfs_fsmnt) - size); | |
174 | bcopy((caddr_t)fs->lfs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, | |
175 | MNAMELEN); | |
79a0d4bf | 176 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
0b4d6502 KB |
177 | &size); |
178 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); | |
179 | (void) lfs_statfs(mp, &mp->mnt_stat, p); | |
180 | #endif | |
7188ac27 | 181 | return (0); |
71e4e98b SL |
182 | } |
183 | ||
7188ac27 KM |
184 | /* |
185 | * Common code for mount and mountroot | |
0b4d6502 | 186 | * LFS specific |
7188ac27 | 187 | */ |
79a0d4bf | 188 | int |
0b4d6502 | 189 | lfs_mountfs(devvp, mp, p) |
1182ae61 | 190 | register struct vnode *devvp; |
7188ac27 | 191 | struct mount *mp; |
0eb6f54a | 192 | struct proc *p; |
71e4e98b | 193 | { |
1c26e003 | 194 | extern struct vnode *rootvp; |
d9f5f868 | 195 | register struct lfs *fs; |
0b4d6502 | 196 | register struct ufsmount *ump; |
0b4d6502 KB |
197 | struct vnode *vp; |
198 | struct buf *bp; | |
199 | struct partinfo dpart; | |
0b4d6502 KB |
200 | dev_t dev; |
201 | int error, i, ronly, size; | |
71e4e98b | 202 | |
1feabdab | 203 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) |
7188ac27 | 204 | return (error); |
0b4d6502 | 205 | |
0eb6f54a | 206 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) |
609e7cfa | 207 | size = DEV_BSIZE; |
0eb6f54a | 208 | else { |
ec67a3ce | 209 | size = dpart.disklab->d_secsize; |
0b4d6502 KB |
210 | #ifdef NEVER_USED |
211 | dpart.part->p_fstype = FS_LFS; | |
212 | dpart.part->p_fsize = fs->lfs_fsize; /* frag size */ | |
213 | dpart.part->p_frag = fs->lfs_frag; /* frags per block */ | |
214 | dpart.part->p_cpg = fs->lfs_segshift; /* segment shift */ | |
215 | #endif | |
7188ac27 | 216 | } |
0b4d6502 KB |
217 | |
218 | /* Don't free random space on error. */ | |
219 | bp = NULL; | |
220 | ump = NULL; | |
221 | ||
222 | /* Read in the superblock. */ | |
223 | if (error = bread(devvp, LFS_LABELPAD / size, LFS_SBPAD, NOCRED, &bp)) | |
71e4e98b | 224 | goto out; |
8dc876c1 | 225 | error = EINVAL; /* XXX needs translation */ |
1c281610 MK |
226 | goto out; |
227 | } | |
0b4d6502 KB |
228 | |
229 | /* Allocate the mount structure, copy the superblock into it. */ | |
8dc876c1 | 230 | ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK); |
0c0b26ec | 231 | fs = ump->um_lfs = malloc(sizeof(struct lfs), M_UFSMNT, M_WAITOK); |
cb84e0ab | 232 | bcopy(bp->b_data, fs, sizeof(struct lfs)); |
d9f5f868 | 233 | if (sizeof(struct lfs) < LFS_SBPAD) /* XXX why? */ |
5d96a9ad | 234 | bp->b_flags |= B_INVAL; |
e018935f MK |
235 | brelse(bp); |
236 | bp = NULL; | |
0b4d6502 | 237 | |
d5075120 KB |
238 | /* Set up the I/O information */ |
239 | fs->lfs_iocount = 0; | |
d5075120 | 240 | |
0c0b26ec | 241 | /* Set up the ifile and lock aflags */ |
3ce71481 KB |
242 | fs->lfs_doifile = 0; |
243 | fs->lfs_writer = 0; | |
244 | fs->lfs_dirops = 0; | |
0c0b26ec | 245 | fs->lfs_seglock = 0; |
3ce71481 | 246 | |
0b4d6502 | 247 | /* Set the file system readonly/modify bits. */ |
0b4d6502 | 248 | fs->lfs_ronly = ronly; |
71e4e98b | 249 | if (ronly == 0) |
0b4d6502 KB |
250 | fs->lfs_fmod = 1; |
251 | ||
252 | /* Initialize the mount structure. */ | |
253 | dev = devvp->v_rdev; | |
82161bc8 KM |
254 | mp->mnt_data = (qaddr_t)ump; |
255 | mp->mnt_stat.f_fsid.val[0] = (long)dev; | |
79a0d4bf | 256 | mp->mnt_stat.f_fsid.val[1] = MOUNT_LFS; |
b390cbb0 | 257 | mp->mnt_maxsymlinklen = fs->lfs_maxsymlinklen; |
82161bc8 | 258 | mp->mnt_flag |= MNT_LOCAL; |
7188ac27 KM |
259 | ump->um_mountp = mp; |
260 | ump->um_dev = dev; | |
261 | ump->um_devvp = devvp; | |
5e539b49 MS |
262 | ump->um_bptrtodb = 0; |
263 | ump->um_seqinc = 1 << fs->lfs_fsbtodb; | |
264 | ump->um_nindir = fs->lfs_nindir; | |
8dc876c1 KM |
265 | for (i = 0; i < MAXQUOTAS; i++) |
266 | ump->um_quotas[i] = NULLVP; | |
f9c367e8 | 267 | devvp->v_specflags |= SI_MOUNTEDON; |
7188ac27 | 268 | |
f9c367e8 KB |
269 | /* |
270 | * We use the ifile vnode for almost every operation. Instead of | |
271 | * retrieving it from the hash table each time we retrieve it here, | |
272 | * artificially increment the reference count and keep a pointer | |
273 | * to it in the incore copy of the superblock. | |
274 | */ | |
f7802306 | 275 | if (error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) |
0b4d6502 | 276 | goto out; |
0b4d6502 | 277 | fs->lfs_ivnode = vp; |
f9c367e8 KB |
278 | VREF(vp); |
279 | vput(vp); | |
0b4d6502 | 280 | |
609e7cfa | 281 | |
7188ac27 | 282 | return (0); |
71e4e98b | 283 | out: |
c86c9b6e KM |
284 | if (bp) |
285 | brelse(bp); | |
0b4d6502 | 286 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); |
8dc876c1 | 287 | if (ump) { |
ece51ee9 | 288 | free(ump->um_lfs, M_UFSMNT); |
d9f5f868 | 289 | free(ump, M_UFSMNT); |
82161bc8 | 290 | mp->mnt_data = (qaddr_t)0; |
27d00e76 | 291 | } |
7188ac27 | 292 | return (error); |
71e4e98b SL |
293 | } |
294 | ||
7188ac27 KM |
295 | /* |
296 | * unmount system call | |
297 | */ | |
0b4d6502 | 298 | lfs_unmount(mp, mntflags, p) |
7188ac27 | 299 | struct mount *mp; |
8dc876c1 | 300 | int mntflags; |
0eb6f54a | 301 | struct proc *p; |
71e4e98b | 302 | { |
d9f5f868 | 303 | extern int doforce; |
7188ac27 | 304 | register struct ufsmount *ump; |
0c0b26ec | 305 | register struct lfs *fs; |
f7802306 | 306 | int i, error, flags, ronly; |
71e4e98b | 307 | |
f7802306 | 308 | flags = 0; |
87be6db2 | 309 | if (mntflags & MNT_FORCE) { |
eb49bed5 | 310 | if (!doforce || (mp->mnt_flag & MNT_ROOTFS)) |
87be6db2 | 311 | return (EINVAL); |
8dc876c1 | 312 | flags |= FORCECLOSE; |
87be6db2 | 313 | } |
3ce71481 | 314 | |
7188ac27 | 315 | ump = VFSTOUFS(mp); |
3ce71481 | 316 | fs = ump->um_lfs; |
ec67a3ce | 317 | return (error); |
71e4e98b | 318 | #ifdef QUOTA |
82161bc8 | 319 | if (mp->mnt_flag & MNT_QUOTA) { |
3ce71481 | 320 | if (error = vflush(mp, fs->lfs_ivnode, SKIPSYSTEM|flags)) |
6d943995 | 321 | return (error); |
8dc876c1 KM |
322 | for (i = 0; i < MAXQUOTAS; i++) { |
323 | if (ump->um_quotas[i] == NULLVP) | |
324 | continue; | |
70a360ba | 325 | quotaoff(p, mp, i); |
8dc876c1 | 326 | } |
6d943995 | 327 | /* |
8dc876c1 KM |
328 | * Here we fall through to vflush again to ensure |
329 | * that we have gotten rid of all the system vnodes. | |
6d943995 | 330 | */ |
8dc876c1 | 331 | } |
71e4e98b | 332 | #endif |
f7802306 | 333 | if (error = vflush(mp, fs->lfs_ivnode, flags)) |
6d943995 | 334 | return (error); |
0c0b26ec | 335 | fs->lfs_clean = 1; |
f7802306 KB |
336 | if (error = VFS_SYNC(mp, 1, p->p_ucred, p)) |
337 | return (error); | |
eb49bed5 | 338 | if (fs->lfs_ivnode->v_dirtyblkhd.lh_first) |
f7802306 | 339 | panic("lfs_unmount: still dirty blocks on ifile vnode\n"); |
4c9381d8 | 340 | vrele(fs->lfs_ivnode); |
f7802306 KB |
341 | vgone(fs->lfs_ivnode); |
342 | ||
0b4d6502 | 343 | ronly = !fs->lfs_ronly; |
7188ac27 KM |
344 | * Get file system statistics. |
345 | */ | |
0b4d6502 | 346 | lfs_statfs(mp, sbp, p) |
7188ac27 KM |
347 | struct mount *mp; |
348 | register struct statfs *sbp; | |
0eb6f54a | 349 | struct proc *p; |
7188ac27 | 350 | { |
d9f5f868 | 351 | register struct lfs *fs; |
7188ac27 | 352 | register struct ufsmount *ump; |
7188ac27 KM |
353 | |
354 | ump = VFSTOUFS(mp); | |
0b4d6502 KB |
355 | fs = ump->um_lfs; |
356 | if (fs->lfs_magic != LFS_MAGIC) | |
357 | panic("lfs_statfs: magic"); | |
358 | sbp->f_type = MOUNT_LFS; | |
0b4d6502 | 359 | sbp->f_bsize = fs->lfs_bsize; |
cc173077 | 360 | sbp->f_iosize = fs->lfs_bsize; |
4d3cf006 | 361 | sbp->f_blocks = dbtofsb(fs,fs->lfs_dsize); |
435a74c9 | 362 | sbp->f_bfree = dbtofsb(fs, fs->lfs_bfree); |
0b4d6502 | 363 | sbp->f_bavail = (fs->lfs_dsize * (100 - fs->lfs_minfree) / 100) - |
76353702 | 364 | (fs->lfs_dsize - fs->lfs_bfree); |
4d3cf006 | 365 | sbp->f_bavail = dbtofsb(fs, sbp->f_bavail); |
0b4d6502 | 366 | sbp->f_files = fs->lfs_nfiles; |
435a74c9 | 367 | sbp->f_ffree = sbp->f_bfree * INOPB(fs); |
82161bc8 KM |
368 | if (sbp != &mp->mnt_stat) { |
369 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, | |
d45de50d | 370 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
82161bc8 | 371 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
d45de50d KM |
372 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
373 | } | |
7188ac27 KM |
374 | return (0); |
375 | } | |
376 | ||
7188ac27 KM |
377 | /* |
378 | * Go through the disk queues to initiate sandbagged IO; | |
379 | * go through the inodes to write those that have been modified; | |
380 | * initiate the writing of the super block if it has been modified. | |
8dc876c1 KM |
381 | * |
382 | * Note: we are always called with the filesystem marked `MPBUSY'. | |
7188ac27 | 383 | */ |
f7802306 | 384 | lfs_sync(mp, waitfor, cred, p) |
71e4e98b | 385 | struct mount *mp; |
7188ac27 | 386 | int waitfor; |
f7802306 KB |
387 | struct ucred *cred; |
388 | struct proc *p; | |
71e4e98b | 389 | { |
275ca4f0 | 390 | int error; |
7188ac27 | 391 | |
c9cbb645 | 392 | /* All syncs must be checkpoints until roll-forward is implemented. */ |
d2495626 | 393 | error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); |
8dc876c1 KM |
394 | #ifdef QUOTA |
395 | qsync(mp); | |
396 | #endif | |
275ca4f0 | 397 | return (error); |
7188ac27 | 398 | } |
b16ed5f4 | 399 | |
f7802306 KB |
400 | /* |
401 | * Look up an LFS dinode number to find its incore vnode. If not already | |
402 | * in core, read it in from the specified device. Return the inode locked. | |
403 | * Detection and handling of mount points must be done by the calling routine. | |
404 | */ | |
405 | int | |
406 | lfs_vget(mp, ino, vpp) | |
407 | struct mount *mp; | |
408 | ino_t ino; | |
409 | struct vnode **vpp; | |
410 | { | |
411 | register struct lfs *fs; | |
412 | register struct inode *ip; | |
413 | struct buf *bp; | |
414 | struct ifile *ifp; | |
415 | struct vnode *vp; | |
416 | struct ufsmount *ump; | |
417 | daddr_t daddr; | |
418 | dev_t dev; | |
419 | int error; | |
420 | ||
f7802306 KB |
421 | ump = VFSTOUFS(mp); |
422 | dev = ump->um_dev; | |
423 | if ((*vpp = ufs_ihashget(dev, ino)) != NULL) | |
424 | return (0); | |
425 | ||
426 | /* Translate the inode number to a disk address. */ | |
427 | fs = ump->um_lfs; | |
428 | if (ino == LFS_IFILE_INUM) | |
429 | daddr = fs->lfs_idaddr; | |
430 | else { | |
431 | LFS_IENTRY(ifp, fs, ino, bp); | |
432 | daddr = ifp->if_daddr; | |
433 | brelse(bp); | |
434 | if (daddr == LFS_UNUSED_DADDR) | |
435 | return (ENOENT); | |
436 | } | |
437 | ||
438 | /* Allocate new vnode/inode. */ | |
439 | if (error = lfs_vcreate(mp, ino, &vp)) { | |
440 | *vpp = NULL; | |
441 | return (error); | |
442 | } | |
443 | ||
444 | /* | |
445 | * Put it onto its hash chain and lock it so that other requests for | |
446 | * this inode will block if they arrive while we are sleeping waiting | |
447 | * for old data structures to be purged or for the contents of the | |
448 | * disk portion of this inode to be read. | |
449 | */ | |
450 | ip = VTOI(vp); | |
451 | ufs_ihashins(ip); | |
452 | ||
453 | /* | |
454 | * XXX | |
455 | * This may not need to be here, logically it should go down with | |
456 | * the i_devvp initialization. | |
457 | * Ask Kirk. | |
458 | */ | |
459 | ip->i_lfs = ump->um_lfs; | |
460 | ||
461 | /* Read in the disk contents for the inode, copy into the inode. */ | |
462 | if (error = | |
463 | bread(ump->um_devvp, daddr, (int)fs->lfs_bsize, NOCRED, &bp)) { | |
464 | /* | |
f345d060 KM |
465 | * The inode does not contain anything useful, so it would |
466 | * be misleading to leave it on its hash chain. With mode | |
467 | * still zero, it will be unlinked and returned to the free | |
468 | * list by vput(). | |
f7802306 | 469 | */ |
eca11e88 | 470 | vput(vp); |
f7802306 KB |
471 | brelse(bp); |
472 | *vpp = NULL; | |
473 | return (error); | |
474 | } | |
cb84e0ab | 475 | ip->i_din = *lfs_ifind(fs, ino, (struct dinode *)bp->b_data); |
f7802306 KB |
476 | brelse(bp); |
477 | ||
478 | /* | |
479 | * Initialize the vnode from the inode, check for aliases. In all | |
480 | * cases re-init ip, the underlying vnode/inode may have changed. | |
481 | */ | |
482 | if (error = ufs_vinit(mp, lfs_specop_p, LFS_FIFOOPS, &vp)) { | |
eca11e88 | 483 | vput(vp); |
f7802306 KB |
484 | *vpp = NULL; |
485 | return (error); | |
486 | } | |
487 | /* | |
488 | * Finish inode initialization now that aliasing has been resolved. | |
489 | */ | |
490 | ip->i_devvp = ump->um_devvp; | |
491 | VREF(ip->i_devvp); | |
492 | *vpp = vp; | |
493 | return (0); | |
494 | } | |
495 | ||
b16ed5f4 KM |
496 | /* |
497 | * File handle to vnode | |
498 | * | |
499 | * Have to be really careful about stale file handles: | |
500 | * - check that the inode number is valid | |
501 | * - call lfs_vget() to get the locked inode | |
502 | * - check for an unallocated inode (i_mode == 0) | |
9e4a3a4a KM |
503 | * - check that the given client host has export rights and return |
504 | * those rights via. exflagsp and credanonp | |
b16ed5f4 KM |
505 | * |
506 | * XXX | |
507 | * use ifile to see if inode is allocated instead of reading off disk | |
508 | * what is the relationship between my generational number and the NFS | |
509 | * generational number. | |
510 | */ | |
511 | int | |
3a0a9bdc | 512 | lfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) |
b16ed5f4 KM |
513 | register struct mount *mp; |
514 | struct fid *fhp; | |
3a0a9bdc | 515 | struct mbuf *nam; |
b16ed5f4 | 516 | struct vnode **vpp; |
3a0a9bdc KM |
517 | int *exflagsp; |
518 | struct ucred **credanonp; | |
b16ed5f4 | 519 | { |
b16ed5f4 | 520 | register struct ufid *ufhp; |
b16ed5f4 KM |
521 | |
522 | ufhp = (struct ufid *)fhp; | |
523 | if (ufhp->ufid_ino < ROOTINO) | |
3a0a9bdc | 524 | return (ESTALE); |
485cf2ee | 525 | return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); |
b16ed5f4 KM |
526 | } |
527 | ||
528 | /* | |
529 | * Vnode pointer to File handle | |
530 | */ | |
531 | /* ARGSUSED */ | |
532 | lfs_vptofh(vp, fhp) | |
533 | struct vnode *vp; | |
534 | struct fid *fhp; | |
535 | { | |
536 | register struct inode *ip; | |
537 | register struct ufid *ufhp; | |
538 | ||
539 | ip = VTOI(vp); | |
540 | ufhp = (struct ufid *)fhp; | |
541 | ufhp->ufid_len = sizeof(struct ufid); | |
542 | ufhp->ufid_ino = ip->i_number; | |
543 | ufhp->ufid_gen = ip->i_gen; | |
544 | return (0); | |
545 | } |