Commit | Line | Data |
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da7c5cc6 | 1 | /* |
7188ac27 KM |
2 | * Copyright (c) 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
7188ac27 KM |
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 | * | |
3b931949 | 17 | * @(#)lfs_vfsops.c 7.36 (Berkeley) %G% |
da7c5cc6 | 18 | */ |
71e4e98b | 19 | |
94368568 JB |
20 | #include "param.h" |
21 | #include "systm.h" | |
7188ac27 KM |
22 | #include "time.h" |
23 | #include "kernel.h" | |
24 | #include "namei.h" | |
25 | #include "vnode.h" | |
94368568 | 26 | #include "mount.h" |
7188ac27 | 27 | #include "buf.h" |
a937f856 | 28 | #include "ucred.h" |
94368568 | 29 | #include "file.h" |
ec67a3ce | 30 | #include "disklabel.h" |
7188ac27 KM |
31 | #include "ioctl.h" |
32 | #include "errno.h" | |
4def0c5e | 33 | #include "malloc.h" |
7188ac27 KM |
34 | #include "../ufs/fs.h" |
35 | #include "../ufs/ufsmount.h" | |
36 | #include "../ufs/inode.h" | |
609e7cfa MK |
37 | #include "ioctl.h" |
38 | #include "disklabel.h" | |
39 | #include "stat.h" | |
71e4e98b | 40 | |
7188ac27 KM |
41 | /* |
42 | * ufs vfs operations. | |
43 | */ | |
44 | int ufs_mount(); | |
5bf9d21f | 45 | int ufs_start(); |
7188ac27 KM |
46 | int ufs_unmount(); |
47 | int ufs_root(); | |
48 | int ufs_statfs(); | |
49 | int ufs_sync(); | |
50 | int ufs_fhtovp(); | |
51 | int ufs_vptofh(); | |
de0d8667 | 52 | int ufs_init(); |
7188ac27 KM |
53 | |
54 | struct vfsops ufs_vfsops = { | |
55 | ufs_mount, | |
5bf9d21f | 56 | ufs_start, |
7188ac27 KM |
57 | ufs_unmount, |
58 | ufs_root, | |
59 | ufs_statfs, | |
60 | ufs_sync, | |
61 | ufs_fhtovp, | |
de0d8667 KM |
62 | ufs_vptofh, |
63 | ufs_init | |
7188ac27 KM |
64 | }; |
65 | ||
66 | /* | |
67 | * ufs mount table. | |
68 | */ | |
69 | struct ufsmount mounttab[NMOUNT]; | |
70 | ||
71 | /* | |
d48157d5 | 72 | * Called by vfs_mountroot when ufs is going to be mounted as root. |
7188ac27 | 73 | * |
d48157d5 | 74 | * Name is updated by mount(8) after booting. |
7188ac27 | 75 | */ |
8a4911ca | 76 | #define ROOTNAME "root_device" |
7188ac27 KM |
77 | |
78 | ufs_mountroot() | |
71e4e98b | 79 | { |
7188ac27 KM |
80 | register struct mount *mp; |
81 | extern struct vnode *rootvp; | |
82 | struct ufsmount *ump; | |
71e4e98b | 83 | register struct fs *fs; |
7188ac27 KM |
84 | u_int size; |
85 | int error; | |
71e4e98b | 86 | |
7188ac27 KM |
87 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
88 | M_MOUNT, M_WAITOK); | |
89 | mp->m_op = &ufs_vfsops; | |
5d96a9ad | 90 | mp->m_flag = M_RDONLY; |
7188ac27 | 91 | mp->m_exroot = 0; |
31593ba7 | 92 | mp->m_mounth = (struct vnode *)0; |
7188ac27 KM |
93 | error = mountfs(rootvp, mp); |
94 | if (error) { | |
95 | free((caddr_t)mp, M_MOUNT); | |
96 | return (error); | |
71e4e98b | 97 | } |
d48157d5 | 98 | if (error = vfs_lock(mp)) { |
7188ac27 KM |
99 | (void)ufs_unmount(mp, 0); |
100 | free((caddr_t)mp, M_MOUNT); | |
101 | return (error); | |
6d07f4cd | 102 | } |
d48157d5 KM |
103 | rootfs = mp; |
104 | mp->m_next = mp; | |
105 | mp->m_prev = mp; | |
106 | mp->m_vnodecovered = (struct vnode *)0; | |
7188ac27 KM |
107 | ump = VFSTOUFS(mp); |
108 | fs = ump->um_fs; | |
d45de50d | 109 | bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); |
7188ac27 | 110 | fs->fs_fsmnt[0] = '/'; |
d45de50d KM |
111 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->m_stat.f_mntonname, MNAMELEN); |
112 | (void) copystr(ROOTNAME, mp->m_stat.f_mntfromname, MNAMELEN - 1, &size); | |
113 | bzero(mp->m_stat.f_mntfromname + size, MNAMELEN - size); | |
114 | (void) ufs_statfs(mp, &mp->m_stat); | |
7188ac27 KM |
115 | vfs_unlock(mp); |
116 | inittodr(fs->fs_time); | |
117 | return (0); | |
118 | } | |
119 | ||
120 | /* | |
121 | * VFS Operations. | |
122 | * | |
123 | * mount system call | |
124 | */ | |
125 | ufs_mount(mp, path, data, ndp) | |
d45de50d | 126 | register struct mount *mp; |
7188ac27 KM |
127 | char *path; |
128 | caddr_t data; | |
129 | struct nameidata *ndp; | |
130 | { | |
131 | struct vnode *devvp; | |
132 | struct ufs_args args; | |
133 | struct ufsmount *ump; | |
134 | register struct fs *fs; | |
135 | u_int size; | |
136 | int error; | |
137 | ||
138 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) | |
139 | return (error); | |
3b931949 KM |
140 | /* |
141 | * Process export requests. | |
142 | */ | |
143 | if ((args.exflags & M_EXPORTED) || (mp->m_flag & M_EXPORTED)) { | |
144 | if (args.exflags & M_EXPORTED) | |
145 | mp->m_flag |= M_EXPORTED; | |
146 | else | |
147 | mp->m_flag &= ~M_EXPORTED; | |
148 | if (args.exflags & M_EXRDONLY) | |
149 | mp->m_flag |= M_EXRDONLY; | |
150 | else | |
151 | mp->m_flag &= ~M_EXRDONLY; | |
152 | mp->m_exroot = args.exroot; | |
153 | } | |
d48157d5 | 154 | if ((mp->m_flag & M_UPDATE) == 0) { |
3b931949 KM |
155 | if ((error = getmdev(&devvp, args.fspec, ndp)) != 0) |
156 | return (error); | |
d48157d5 KM |
157 | error = mountfs(devvp, mp); |
158 | } else { | |
159 | ump = VFSTOUFS(mp); | |
160 | fs = ump->um_fs; | |
161 | if (fs->fs_ronly && (mp->m_flag & M_RDONLY) == 0) | |
162 | fs->fs_ronly = 0; | |
163 | /* | |
164 | * Verify that the specified device is the one that | |
165 | * is really being used for the root file system. | |
166 | */ | |
3b931949 KM |
167 | if (args.fspec == 0) |
168 | return (0); | |
169 | if ((error = getmdev(&devvp, args.fspec, ndp)) != 0) | |
170 | return (error); | |
d48157d5 KM |
171 | if (devvp != ump->um_devvp) |
172 | error = EINVAL; /* needs translation */ | |
173 | } | |
7188ac27 KM |
174 | if (error) { |
175 | vrele(devvp); | |
176 | return (error); | |
27d00e76 | 177 | } |
7188ac27 KM |
178 | ump = VFSTOUFS(mp); |
179 | fs = ump->um_fs; | |
180 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); | |
181 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); | |
d45de50d KM |
182 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->m_stat.f_mntonname, MNAMELEN); |
183 | (void) copyinstr(args.fspec, mp->m_stat.f_mntfromname, MNAMELEN - 1, | |
184 | &size); | |
185 | bzero(mp->m_stat.f_mntfromname + size, MNAMELEN - size); | |
186 | (void) ufs_statfs(mp, &mp->m_stat); | |
7188ac27 | 187 | return (0); |
71e4e98b SL |
188 | } |
189 | ||
7188ac27 KM |
190 | /* |
191 | * Common code for mount and mountroot | |
192 | */ | |
193 | mountfs(devvp, mp) | |
194 | struct vnode *devvp; | |
195 | struct mount *mp; | |
71e4e98b | 196 | { |
7188ac27 KM |
197 | register struct ufsmount *ump; |
198 | struct ufsmount *fmp = NULL; | |
199 | struct buf *bp = NULL; | |
71e4e98b | 200 | register struct fs *fs; |
7188ac27 | 201 | dev_t dev = devvp->v_rdev; |
ec67a3ce MK |
202 | struct partinfo dpart; |
203 | int havepart = 0, blks; | |
27d00e76 | 204 | caddr_t base, space; |
7188ac27 KM |
205 | int havepart = 0, blks; |
206 | int error, i, size; | |
6d07f4cd | 207 | int needclose = 0; |
7188ac27 | 208 | int ronly = (mp->m_flag & M_RDONLY) != 0; |
71e4e98b | 209 | |
7188ac27 KM |
210 | for (ump = &mounttab[0]; ump < &mounttab[NMOUNT]; ump++) { |
211 | if (ump->um_fs == NULL) { | |
27d00e76 | 212 | if (fmp == NULL) |
7188ac27 KM |
213 | fmp = ump; |
214 | } else if (dev == ump->um_dev) { | |
215 | return (EBUSY); /* needs translation */ | |
27d00e76 KM |
216 | } |
217 | } | |
ec67a3ce MK |
218 | (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE, |
219 | S_IFBLK); | |
27d00e76 | 220 | if (error) { |
7188ac27 KM |
221 | ump->um_fs = NULL; |
222 | return (error); | |
27d00e76 | 223 | } |
6d07f4cd | 224 | needclose = 1; |
a937f856 | 225 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED) != 0) |
609e7cfa | 226 | size = DEV_BSIZE; |
7188ac27 | 227 | else { |
ec67a3ce MK |
228 | havepart = 1; |
229 | size = dpart.disklab->d_secsize; | |
7188ac27 | 230 | } |
a937f856 | 231 | if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) { |
7188ac27 | 232 | ump->um_fs = NULL; |
71e4e98b | 233 | goto out; |
27d00e76 | 234 | } |
e018935f | 235 | fs = bp->b_un.b_fs; |
7188ac27 KM |
236 | ump->um_fs = NULL; |
237 | error = EINVAL; /* XXX also needs translation */ | |
1c281610 MK |
238 | goto out; |
239 | } | |
7188ac27 | 240 | ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK, |
5adcb337 | 241 | M_WAITOK); |
7188ac27 | 242 | bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs, |
71e4e98b | 243 | (u_int)fs->fs_sbsize); |
5d96a9ad KM |
244 | if (fs->fs_sbsize < SBSIZE) |
245 | bp->b_flags |= B_INVAL; | |
e018935f MK |
246 | brelse(bp); |
247 | bp = NULL; | |
7188ac27 KM |
248 | fs = ump->um_fs; |
249 | fs->fs_ronly = ronly; | |
71e4e98b SL |
250 | if (ronly == 0) |
251 | fs->fs_fmod = 1; | |
609e7cfa MK |
252 | if (havepart) { |
253 | dpart.part->p_fstype = FS_BSDFFS; | |
254 | dpart.part->p_fsize = fs->fs_fsize; | |
255 | dpart.part->p_frag = fs->fs_frag; | |
42ff4c2e | 256 | dpart.part->p_cpg = fs->fs_cpg; |
609e7cfa | 257 | } |
ec67a3ce MK |
258 | #ifdef SECSIZE |
259 | /* | |
260 | * If we have a disk label, force per-partition | |
261 | * filesystem information to be correct | |
262 | * and set correct current fsbtodb shift. | |
263 | */ | |
264 | #endif SECSIZE | |
265 | if (havepart) { | |
266 | dpart.part->p_fstype = FS_BSDFFS; | |
267 | dpart.part->p_fsize = fs->fs_fsize; | |
268 | dpart.part->p_frag = fs->fs_frag; | |
269 | #ifdef SECSIZE | |
270 | #ifdef tahoe | |
271 | /* | |
272 | * Save the original fsbtodb shift to restore on updates. | |
273 | * (Console doesn't understand fsbtodb changes.) | |
274 | */ | |
275 | fs->fs_sparecon[0] = fs->fs_fsbtodb; | |
276 | #endif | |
277 | i = fs->fs_fsize / size; | |
278 | for (fs->fs_fsbtodb = 0; i > 1; i >>= 1) | |
279 | fs->fs_fsbtodb++; | |
280 | #endif SECSIZE | |
281 | fs->fs_dbsize = size; | |
282 | } | |
71e4e98b | 283 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
5adcb337 KM |
284 | base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK, |
285 | M_WAITOK); | |
71e4e98b SL |
286 | for (i = 0; i < blks; i += fs->fs_frag) { |
287 | size = fs->fs_bsize; | |
288 | if (i + fs->fs_frag > blks) | |
289 | size = (blks - i) * fs->fs_fsize; | |
ec67a3ce MK |
290 | #ifdef SECSIZE |
291 | tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size, | |
292 | fs->fs_dbsize); | |
293 | #else SECSIZE | |
a937f856 KM |
294 | error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, |
295 | NOCRED, &bp); | |
7188ac27 | 296 | if (error) { |
5adcb337 | 297 | free((caddr_t)base, M_SUPERBLK); |
71e4e98b SL |
298 | goto out; |
299 | } | |
e018935f | 300 | bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size); |
60f9c9e3 | 301 | fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; |
71e4e98b | 302 | space += size; |
e018935f MK |
303 | brelse(bp); |
304 | bp = NULL; | |
71e4e98b | 305 | } |
7188ac27 | 306 | mp->m_data = (qaddr_t)ump; |
d45de50d KM |
307 | mp->m_stat.f_fsid.val[0] = (long)dev; |
308 | mp->m_stat.f_fsid.val[1] = MOUNT_UFS; | |
7188ac27 KM |
309 | ump->um_mountp = mp; |
310 | ump->um_dev = dev; | |
311 | ump->um_devvp = devvp; | |
312 | ump->um_qinod = NULL; | |
313 | ||
94354803 KM |
314 | /* Sanity checks for old file systems. XXX */ |
315 | fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */ | |
316 | fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */ | |
2af59000 KM |
317 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
318 | fs->fs_nrpos = 8; /* XXX */ | |
609e7cfa | 319 | |
7188ac27 | 320 | return (0); |
71e4e98b | 321 | out: |
609e7cfa | 322 | if (needclose) |
a937f856 | 323 | (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); |
7188ac27 KM |
324 | if (ump->um_fs) { |
325 | free((caddr_t)ump->um_fs, M_SUPERBLK); | |
326 | ump->um_fs = NULL; | |
27d00e76 | 327 | } |
e018935f MK |
328 | if (bp) |
329 | brelse(bp); | |
7188ac27 | 330 | return (error); |
71e4e98b SL |
331 | } |
332 | ||
5bf9d21f KM |
333 | /* |
334 | * Make a filesystem operational. | |
335 | * Nothing to do at the moment. | |
336 | */ | |
31593ba7 | 337 | /* ARGSUSED */ |
5bf9d21f KM |
338 | ufs_start(mp, flags) |
339 | struct mount *mp; | |
340 | int flags; | |
341 | { | |
342 | ||
343 | return (0); | |
344 | } | |
71e4e98b | 345 | |
7188ac27 KM |
346 | /* |
347 | * unmount system call | |
348 | */ | |
349 | ufs_unmount(mp, flags) | |
350 | struct mount *mp; | |
351 | int flags; | |
71e4e98b | 352 | { |
7188ac27 | 353 | register struct ufsmount *ump; |
71e4e98b | 354 | register struct fs *fs; |
7188ac27 | 355 | int error, ronly; |
71e4e98b | 356 | |
7188ac27 KM |
357 | if (flags & MNT_FORCE) |
358 | return (EINVAL); | |
5d96a9ad KM |
359 | mntflushbuf(mp, 0); |
360 | if (mntinvalbuf(mp)) | |
361 | return (EBUSY); | |
7188ac27 | 362 | ump = VFSTOUFS(mp); |
ec67a3ce | 363 | return (error); |
71e4e98b | 364 | #ifdef QUOTA |
6d943995 KM |
365 | if (ump->um_qinod) { |
366 | if (error = vflush(mp, ITOV(ump->um_qinod), flags)) | |
367 | return (error); | |
368 | (void) closedq(ump); | |
369 | /* | |
370 | * Here we have to vflush again to get rid of the quota inode. | |
371 | * A drag, but it would be ugly to cheat, and this system | |
372 | * call does not happen often. | |
373 | */ | |
374 | if (vflush(mp, (struct vnode *)NULL, MNT_NOFORCE)) | |
375 | panic("ufs_unmount: quota"); | |
376 | } else | |
71e4e98b | 377 | #endif |
6d943995 KM |
378 | if (error = vflush(mp, (struct vnode *)NULL, flags)) |
379 | return (error); | |
7188ac27 KM |
380 | fs = ump->um_fs; |
381 | ronly = !fs->fs_ronly; | |
4def0c5e | 382 | free((caddr_t)fs->fs_csp[0], M_SUPERBLK); |
ec67a3ce MK |
383 | error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE); |
384 | irele(ip); | |
385 | return (error); | |
71e4e98b SL |
386 | } |
387 | ||
7188ac27 KM |
388 | /* |
389 | * Return root of a filesystem | |
390 | */ | |
391 | ufs_root(mp, vpp) | |
392 | struct mount *mp; | |
393 | struct vnode **vpp; | |
394 | { | |
31593ba7 KM |
395 | register struct inode *ip; |
396 | struct inode *nip; | |
397 | struct vnode tvp; | |
7188ac27 KM |
398 | int error; |
399 | ||
31593ba7 KM |
400 | tvp.v_mount = mp; |
401 | ip = VTOI(&tvp); | |
402 | ip->i_vnode = &tvp; | |
403 | ip->i_dev = VFSTOUFS(mp)->um_dev; | |
404 | error = iget(ip, (ino_t)ROOTINO, &nip); | |
7188ac27 KM |
405 | if (error) |
406 | return (error); | |
31593ba7 | 407 | *vpp = ITOV(nip); |
7188ac27 KM |
408 | return (0); |
409 | } | |
410 | ||
411 | /* | |
412 | * Get file system statistics. | |
413 | */ | |
414 | ufs_statfs(mp, sbp) | |
415 | struct mount *mp; | |
416 | register struct statfs *sbp; | |
417 | { | |
418 | register struct ufsmount *ump; | |
419 | register struct fs *fs; | |
420 | ||
421 | ump = VFSTOUFS(mp); | |
422 | fs = ump->um_fs; | |
423 | if (fs->fs_magic != FS_MAGIC) | |
424 | panic("ufs_statfs"); | |
425 | sbp->f_type = MOUNT_UFS; | |
7188ac27 KM |
426 | sbp->f_fsize = fs->fs_fsize; |
427 | sbp->f_bsize = fs->fs_bsize; | |
428 | sbp->f_blocks = fs->fs_dsize; | |
429 | sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + | |
430 | fs->fs_cstotal.cs_nffree; | |
431 | sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - | |
432 | (fs->fs_dsize - sbp->f_bfree); | |
5c41c19e | 433 | sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; |
7188ac27 | 434 | sbp->f_ffree = fs->fs_cstotal.cs_nifree; |
d45de50d KM |
435 | if (sbp != &mp->m_stat) { |
436 | bcopy((caddr_t)mp->m_stat.f_mntonname, | |
437 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); | |
438 | bcopy((caddr_t)mp->m_stat.f_mntfromname, | |
439 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); | |
440 | } | |
7188ac27 KM |
441 | return (0); |
442 | } | |
443 | ||
444 | int syncprt = 0; | |
445 | ||
446 | /* | |
447 | * Go through the disk queues to initiate sandbagged IO; | |
448 | * go through the inodes to write those that have been modified; | |
449 | * initiate the writing of the super block if it has been modified. | |
450 | */ | |
451 | ufs_sync(mp, waitfor) | |
71e4e98b | 452 | struct mount *mp; |
7188ac27 | 453 | int waitfor; |
71e4e98b | 454 | { |
31593ba7 | 455 | register struct vnode *vp; |
7188ac27 KM |
456 | register struct inode *ip; |
457 | register struct ufsmount *ump = VFSTOUFS(mp); | |
458 | register struct fs *fs; | |
25b5cf58 | 459 | struct vnode *nvp; |
812b91f3 | 460 | int error, allerror = 0; |
7188ac27 KM |
461 | static int updlock = 0; |
462 | ||
463 | if (syncprt) | |
464 | bufstats(); | |
465 | if (updlock) | |
466 | return (EBUSY); | |
467 | fs = ump->um_fs; | |
468 | if (fs == (struct fs *)1) | |
469 | return (0); | |
470 | updlock++; | |
471 | /* | |
472 | * Write back modified superblock. | |
473 | * Consistency check that the superblock | |
474 | * is still in the buffer cache. | |
475 | */ | |
476 | if (fs->fs_fmod != 0) { | |
477 | if (fs->fs_ronly != 0) { /* XXX */ | |
478 | printf("fs = %s\n", fs->fs_fsmnt); | |
479 | panic("update: rofs mod"); | |
480 | } | |
481 | fs->fs_fmod = 0; | |
482 | fs->fs_time = time.tv_sec; | |
483 | error = sbupdate(ump, waitfor); | |
484 | } | |
485 | /* | |
486 | * Write back each (modified) inode. | |
487 | */ | |
25b5cf58 KM |
488 | loop: |
489 | for (vp = mp->m_mounth; vp; vp = nvp) { | |
490 | nvp = vp->v_mountf; | |
31593ba7 | 491 | ip = VTOI(vp); |
25b5cf58 KM |
492 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 && |
493 | vp->v_dirtyblkhd == NULL) | |
7188ac27 | 494 | continue; |
25b5cf58 KM |
495 | if (vget(vp)) |
496 | goto loop; | |
497 | if (vp->v_dirtyblkhd) | |
498 | vflushbuf(vp, 0); | |
499 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) && | |
500 | (error = iupdat(ip, &time, &time, 0))) | |
812b91f3 KM |
501 | allerror = error; |
502 | vput(vp); | |
7188ac27 KM |
503 | } |
504 | updlock = 0; | |
505 | /* | |
5d96a9ad | 506 | * Force stale file system control information to be flushed. |
7188ac27 | 507 | */ |
5d96a9ad | 508 | vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0); |
812b91f3 | 509 | return (allerror); |
7188ac27 KM |
510 | } |
511 | ||
512 | /* | |
513 | * Write a superblock and associated information back to disk. | |
514 | */ | |
515 | sbupdate(mp, waitfor) | |
516 | struct ufsmount *mp; | |
517 | int waitfor; | |
518 | { | |
519 | register struct fs *fs = mp->um_fs; | |
71e4e98b SL |
520 | register struct buf *bp; |
521 | int blks; | |
522 | caddr_t space; | |
7188ac27 | 523 | int i, size, error = 0; |
71e4e98b | 524 | |
ec67a3ce MK |
525 | #ifdef SECSIZE |
526 | bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize), | |
527 | (int)fs->fs_sbsize, fs->fs_dbsize); | |
528 | #else SECSIZE | |
7188ac27 | 529 | bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize); |
ec67a3ce | 530 | #endif SECSIZE |
71e4e98b | 531 | bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize); |
2af59000 KM |
532 | /* Restore compatibility to old file systems. XXX */ |
533 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ | |
534 | bp->b_un.b_fs->fs_nrpos = -1; /* XXX */ | |
ec67a3ce MK |
535 | #ifdef SECSIZE |
536 | #ifdef tahoe | |
537 | /* restore standard fsbtodb shift */ | |
538 | bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0]; | |
539 | bp->b_un.b_fs->fs_sparecon[0] = 0; | |
540 | #endif | |
541 | #endif SECSIZE | |
7188ac27 KM |
542 | if (waitfor == MNT_WAIT) |
543 | error = bwrite(bp); | |
544 | else | |
545 | bawrite(bp); | |
71e4e98b SL |
546 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
547 | space = (caddr_t)fs->fs_csp[0]; | |
548 | for (i = 0; i < blks; i += fs->fs_frag) { | |
549 | size = fs->fs_bsize; | |
550 | if (i + fs->fs_frag > blks) | |
551 | size = (blks - i) * fs->fs_fsize; | |
ec67a3ce MK |
552 | #ifdef SECSIZE |
553 | bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size, | |
554 | fs->fs_dbsize); | |
555 | #else SECSIZE | |
7188ac27 | 556 | bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size); |
ec67a3ce | 557 | #endif SECSIZE |
71e4e98b SL |
558 | bcopy(space, bp->b_un.b_addr, (u_int)size); |
559 | space += size; | |
7188ac27 KM |
560 | if (waitfor == MNT_WAIT) |
561 | error = bwrite(bp); | |
562 | else | |
563 | bawrite(bp); | |
71e4e98b | 564 | } |
7188ac27 | 565 | return (error); |
71e4e98b SL |
566 | } |
567 | ||
568 | /* | |
7188ac27 KM |
569 | * Print out statistics on the current allocation of the buffer pool. |
570 | * Can be enabled to print out on every ``sync'' by setting "syncprt" | |
571 | * above. | |
572 | */ | |
573 | bufstats() | |
574 | { | |
575 | int s, i, j, count; | |
576 | register struct buf *bp, *dp; | |
577 | int counts[MAXBSIZE/CLBYTES+1]; | |
578 | static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" }; | |
579 | ||
580 | for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) { | |
581 | count = 0; | |
582 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) | |
583 | counts[j] = 0; | |
584 | s = splbio(); | |
585 | for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) { | |
586 | counts[dp->b_bufsize/CLBYTES]++; | |
587 | count++; | |
588 | } | |
589 | splx(s); | |
590 | printf("%s: total-%d", bname[i], count); | |
591 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) | |
592 | if (counts[j] != 0) | |
593 | printf(", %d-%d", j * CLBYTES, counts[j]); | |
594 | printf("\n"); | |
595 | } | |
596 | } | |
597 | ||
598 | /* | |
599 | * File handle to vnode | |
113c35f2 KM |
600 | * |
601 | * Have to be really careful about stale file handles: | |
602 | * - check that the inode number is in range | |
603 | * - call iget() to get the locked inode | |
604 | * - check for an unallocated inode (i_mode == 0) | |
605 | * - check that the generation number matches | |
7188ac27 KM |
606 | */ |
607 | ufs_fhtovp(mp, fhp, vpp) | |
113c35f2 | 608 | register struct mount *mp; |
7188ac27 KM |
609 | struct fid *fhp; |
610 | struct vnode **vpp; | |
611 | { | |
612 | register struct ufid *ufhp; | |
113c35f2 | 613 | register struct fs *fs; |
31593ba7 KM |
614 | register struct inode *ip; |
615 | struct inode *nip; | |
616 | struct vnode tvp; | |
7188ac27 KM |
617 | int error; |
618 | ||
619 | ufhp = (struct ufid *)fhp; | |
113c35f2 KM |
620 | fs = VFSTOUFS(mp)->um_fs; |
621 | if (ufhp->ufid_ino < ROOTINO || | |
622 | ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) { | |
623 | *vpp = (struct vnode *)0; | |
624 | return (EINVAL); | |
625 | } | |
31593ba7 KM |
626 | tvp.v_mount = mp; |
627 | ip = VTOI(&tvp); | |
628 | ip->i_vnode = &tvp; | |
629 | ip->i_dev = VFSTOUFS(mp)->um_dev; | |
630 | if (error = iget(ip, ufhp->ufid_ino, &nip)) { | |
113c35f2 | 631 | *vpp = (struct vnode *)0; |
7188ac27 KM |
632 | return (error); |
633 | } | |
31593ba7 | 634 | ip = nip; |
113c35f2 KM |
635 | if (ip->i_mode == 0) { |
636 | iput(ip); | |
637 | *vpp = (struct vnode *)0; | |
638 | return (EINVAL); | |
639 | } | |
7188ac27 KM |
640 | if (ip->i_gen != ufhp->ufid_gen) { |
641 | iput(ip); | |
113c35f2 | 642 | *vpp = (struct vnode *)0; |
7188ac27 KM |
643 | return (EINVAL); |
644 | } | |
645 | *vpp = ITOV(ip); | |
646 | return (0); | |
647 | } | |
648 | ||
649 | /* | |
29e77c27 | 650 | * Vnode pointer to File handle |
7188ac27 KM |
651 | */ |
652 | /* ARGSUSED */ | |
758e3529 KM |
653 | ufs_vptofh(vp, fhp) |
654 | struct vnode *vp; | |
7188ac27 | 655 | struct fid *fhp; |
7188ac27 | 656 | { |
758e3529 KM |
657 | register struct inode *ip = VTOI(vp); |
658 | register struct ufid *ufhp; | |
7188ac27 | 659 | |
758e3529 KM |
660 | ufhp = (struct ufid *)fhp; |
661 | ufhp->ufid_len = sizeof(struct ufid); | |
662 | ufhp->ufid_ino = ip->i_number; | |
663 | ufhp->ufid_gen = ip->i_gen; | |
664 | return (0); | |
7188ac27 KM |
665 | } |
666 | ||
667 | /* | |
668 | * Common code for mount and quota. | |
71e4e98b SL |
669 | * Check that the user's argument is a reasonable |
670 | * thing on which to mount, and return the device number if so. | |
671 | */ | |
7188ac27 KM |
672 | getmdev(devvpp, fname, ndp) |
673 | struct vnode **devvpp; | |
715baff1 | 674 | caddr_t fname; |
7188ac27 | 675 | register struct nameidata *ndp; |
71e4e98b | 676 | { |
7188ac27 KM |
677 | register struct vnode *vp; |
678 | int error; | |
71e4e98b | 679 | |
7188ac27 | 680 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; |
715baff1 KM |
681 | ndp->ni_segflg = UIO_USERSPACE; |
682 | ndp->ni_dirp = fname; | |
7188ac27 KM |
683 | if (error = namei(ndp)) { |
684 | if (error == ENOENT) | |
685 | return (ENODEV); /* needs translation */ | |
686 | return (error); | |
6d07f4cd | 687 | } |
7188ac27 KM |
688 | vp = ndp->ni_vp; |
689 | if (vp->v_type != VBLK) { | |
690 | vput(vp); | |
71e4e98b | 691 | return (ENOTBLK); |
e95cdf5c | 692 | } |
e547d435 KM |
693 | if (major(vp->v_rdev) >= nblkdev) { |
694 | vput(vp); | |
71e4e98b | 695 | return (ENXIO); |
e547d435 | 696 | } |
7188ac27 KM |
697 | iunlock(VTOI(vp)); |
698 | *devvpp = vp; | |
71e4e98b SL |
699 | return (0); |
700 | } |