Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
7188ac27 KM |
2 | * Copyright (c) 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
b702c21d | 7 | * @(#)lfs_vfsops.c 7.49 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
71e4e98b | 9 | |
94368568 JB |
10 | #include "param.h" |
11 | #include "systm.h" | |
8dc876c1 KM |
12 | #include "user.h" |
13 | #include "proc.h" | |
7188ac27 | 14 | #include "kernel.h" |
7188ac27 | 15 | #include "vnode.h" |
0f93ba7b | 16 | #include "specdev.h" |
94368568 | 17 | #include "mount.h" |
7188ac27 | 18 | #include "buf.h" |
94368568 | 19 | #include "file.h" |
ec67a3ce | 20 | #include "disklabel.h" |
7188ac27 KM |
21 | #include "ioctl.h" |
22 | #include "errno.h" | |
4def0c5e | 23 | #include "malloc.h" |
8dc876c1 | 24 | #include "../ufs/quota.h" |
7188ac27 KM |
25 | #include "../ufs/fs.h" |
26 | #include "../ufs/ufsmount.h" | |
27 | #include "../ufs/inode.h" | |
609e7cfa MK |
28 | #include "ioctl.h" |
29 | #include "disklabel.h" | |
30 | #include "stat.h" | |
71e4e98b | 31 | |
7188ac27 KM |
32 | /* |
33 | * ufs vfs operations. | |
34 | */ | |
35 | int ufs_mount(); | |
5bf9d21f | 36 | int ufs_start(); |
7188ac27 KM |
37 | int ufs_unmount(); |
38 | int ufs_root(); | |
8dc876c1 | 39 | int ufs_quotactl(); |
7188ac27 KM |
40 | int ufs_statfs(); |
41 | int ufs_sync(); | |
42 | int ufs_fhtovp(); | |
43 | int ufs_vptofh(); | |
de0d8667 | 44 | int ufs_init(); |
7188ac27 KM |
45 | |
46 | struct vfsops ufs_vfsops = { | |
47 | ufs_mount, | |
5bf9d21f | 48 | ufs_start, |
7188ac27 KM |
49 | ufs_unmount, |
50 | ufs_root, | |
8dc876c1 | 51 | ufs_quotactl, |
7188ac27 KM |
52 | ufs_statfs, |
53 | ufs_sync, | |
54 | ufs_fhtovp, | |
de0d8667 KM |
55 | ufs_vptofh, |
56 | ufs_init | |
7188ac27 KM |
57 | }; |
58 | ||
7188ac27 | 59 | /* |
d48157d5 | 60 | * Called by vfs_mountroot when ufs is going to be mounted as root. |
7188ac27 | 61 | * |
d48157d5 | 62 | * Name is updated by mount(8) after booting. |
7188ac27 | 63 | */ |
8a4911ca | 64 | #define ROOTNAME "root_device" |
7188ac27 KM |
65 | |
66 | ufs_mountroot() | |
71e4e98b | 67 | { |
7188ac27 KM |
68 | register struct mount *mp; |
69 | extern struct vnode *rootvp; | |
70 | struct ufsmount *ump; | |
71e4e98b | 71 | register struct fs *fs; |
7188ac27 KM |
72 | u_int size; |
73 | int error; | |
71e4e98b | 74 | |
7188ac27 KM |
75 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
76 | M_MOUNT, M_WAITOK); | |
82161bc8 KM |
77 | mp->mnt_op = &ufs_vfsops; |
78 | mp->mnt_flag = MNT_RDONLY; | |
79 | mp->mnt_exroot = 0; | |
80 | mp->mnt_mounth = NULLVP; | |
7188ac27 KM |
81 | error = mountfs(rootvp, mp); |
82 | if (error) { | |
83 | free((caddr_t)mp, M_MOUNT); | |
84 | return (error); | |
71e4e98b | 85 | } |
d48157d5 | 86 | if (error = vfs_lock(mp)) { |
7188ac27 KM |
87 | (void)ufs_unmount(mp, 0); |
88 | free((caddr_t)mp, M_MOUNT); | |
89 | return (error); | |
6d07f4cd | 90 | } |
d48157d5 | 91 | rootfs = mp; |
82161bc8 KM |
92 | mp->mnt_next = mp; |
93 | mp->mnt_prev = mp; | |
94 | mp->mnt_vnodecovered = NULLVP; | |
7188ac27 KM |
95 | ump = VFSTOUFS(mp); |
96 | fs = ump->um_fs; | |
d45de50d | 97 | bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); |
7188ac27 | 98 | fs->fs_fsmnt[0] = '/'; |
82161bc8 KM |
99 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
100 | MNAMELEN); | |
101 | (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, | |
102 | &size); | |
103 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); | |
104 | (void) ufs_statfs(mp, &mp->mnt_stat); | |
7188ac27 KM |
105 | vfs_unlock(mp); |
106 | inittodr(fs->fs_time); | |
107 | return (0); | |
108 | } | |
109 | ||
110 | /* | |
111 | * VFS Operations. | |
112 | * | |
113 | * mount system call | |
114 | */ | |
115 | ufs_mount(mp, path, data, ndp) | |
d45de50d | 116 | register struct mount *mp; |
7188ac27 KM |
117 | char *path; |
118 | caddr_t data; | |
119 | struct nameidata *ndp; | |
120 | { | |
121 | struct vnode *devvp; | |
122 | struct ufs_args args; | |
123 | struct ufsmount *ump; | |
124 | register struct fs *fs; | |
125 | u_int size; | |
126 | int error; | |
127 | ||
128 | if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) | |
129 | return (error); | |
3b931949 KM |
130 | /* |
131 | * Process export requests. | |
132 | */ | |
82161bc8 KM |
133 | if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) { |
134 | if (args.exflags & MNT_EXPORTED) | |
135 | mp->mnt_flag |= MNT_EXPORTED; | |
3b931949 | 136 | else |
82161bc8 KM |
137 | mp->mnt_flag &= ~MNT_EXPORTED; |
138 | if (args.exflags & MNT_EXRDONLY) | |
139 | mp->mnt_flag |= MNT_EXRDONLY; | |
3b931949 | 140 | else |
82161bc8 KM |
141 | mp->mnt_flag &= ~MNT_EXRDONLY; |
142 | mp->mnt_exroot = args.exroot; | |
3b931949 | 143 | } |
82161bc8 | 144 | if ((mp->mnt_flag & MNT_UPDATE) == 0) { |
3b931949 KM |
145 | if ((error = getmdev(&devvp, args.fspec, ndp)) != 0) |
146 | return (error); | |
d48157d5 KM |
147 | error = mountfs(devvp, mp); |
148 | } else { | |
149 | ump = VFSTOUFS(mp); | |
150 | fs = ump->um_fs; | |
82161bc8 | 151 | if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0) |
d48157d5 KM |
152 | fs->fs_ronly = 0; |
153 | /* | |
154 | * Verify that the specified device is the one that | |
155 | * is really being used for the root file system. | |
156 | */ | |
3b931949 KM |
157 | if (args.fspec == 0) |
158 | return (0); | |
159 | if ((error = getmdev(&devvp, args.fspec, ndp)) != 0) | |
160 | return (error); | |
d48157d5 KM |
161 | if (devvp != ump->um_devvp) |
162 | error = EINVAL; /* needs translation */ | |
2a7dbb09 KM |
163 | else |
164 | vrele(devvp); | |
d48157d5 | 165 | } |
7188ac27 KM |
166 | if (error) { |
167 | vrele(devvp); | |
168 | return (error); | |
27d00e76 | 169 | } |
7188ac27 KM |
170 | ump = VFSTOUFS(mp); |
171 | fs = ump->um_fs; | |
172 | (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); | |
173 | bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); | |
82161bc8 KM |
174 | bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, |
175 | MNAMELEN); | |
176 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, | |
177 | &size); | |
178 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); | |
179 | (void) ufs_statfs(mp, &mp->mnt_stat); | |
7188ac27 | 180 | return (0); |
71e4e98b SL |
181 | } |
182 | ||
7188ac27 KM |
183 | /* |
184 | * Common code for mount and mountroot | |
185 | */ | |
186 | mountfs(devvp, mp) | |
1182ae61 | 187 | register struct vnode *devvp; |
7188ac27 | 188 | struct mount *mp; |
71e4e98b | 189 | { |
8dc876c1 | 190 | register struct ufsmount *ump = (struct ufsmount *)0; |
7188ac27 | 191 | struct buf *bp = NULL; |
71e4e98b | 192 | register struct fs *fs; |
7188ac27 | 193 | dev_t dev = devvp->v_rdev; |
ec67a3ce MK |
194 | struct partinfo dpart; |
195 | int havepart = 0, blks; | |
27d00e76 | 196 | caddr_t base, space; |
7188ac27 KM |
197 | int havepart = 0, blks; |
198 | int error, i, size; | |
6d07f4cd | 199 | int needclose = 0; |
82161bc8 | 200 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
71e4e98b | 201 | |
8dc876c1 | 202 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED)) |
7188ac27 | 203 | return (error); |
6d07f4cd | 204 | needclose = 1; |
8dc876c1 | 205 | if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED) != 0) { |
609e7cfa | 206 | size = DEV_BSIZE; |
8dc876c1 | 207 | } else { |
ec67a3ce MK |
208 | havepart = 1; |
209 | size = dpart.disklab->d_secsize; | |
7188ac27 | 210 | } |
8dc876c1 | 211 | if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) |
71e4e98b | 212 | goto out; |
e018935f | 213 | fs = bp->b_un.b_fs; |
8dc876c1 | 214 | error = EINVAL; /* XXX needs translation */ |
1c281610 MK |
215 | goto out; |
216 | } | |
8dc876c1 | 217 | ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK); |
7188ac27 | 218 | ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK, |
5adcb337 | 219 | M_WAITOK); |
7188ac27 | 220 | bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs, |
71e4e98b | 221 | (u_int)fs->fs_sbsize); |
5d96a9ad KM |
222 | if (fs->fs_sbsize < SBSIZE) |
223 | bp->b_flags |= B_INVAL; | |
e018935f MK |
224 | brelse(bp); |
225 | bp = NULL; | |
7188ac27 KM |
226 | fs = ump->um_fs; |
227 | fs->fs_ronly = ronly; | |
71e4e98b SL |
228 | if (ronly == 0) |
229 | fs->fs_fmod = 1; | |
609e7cfa MK |
230 | if (havepart) { |
231 | dpart.part->p_fstype = FS_BSDFFS; | |
232 | dpart.part->p_fsize = fs->fs_fsize; | |
233 | dpart.part->p_frag = fs->fs_frag; | |
42ff4c2e | 234 | dpart.part->p_cpg = fs->fs_cpg; |
609e7cfa | 235 | } |
ec67a3ce MK |
236 | #ifdef SECSIZE |
237 | /* | |
238 | * If we have a disk label, force per-partition | |
239 | * filesystem information to be correct | |
240 | * and set correct current fsbtodb shift. | |
241 | */ | |
242 | #endif SECSIZE | |
243 | if (havepart) { | |
244 | dpart.part->p_fstype = FS_BSDFFS; | |
245 | dpart.part->p_fsize = fs->fs_fsize; | |
246 | dpart.part->p_frag = fs->fs_frag; | |
247 | #ifdef SECSIZE | |
248 | #ifdef tahoe | |
249 | /* | |
250 | * Save the original fsbtodb shift to restore on updates. | |
251 | * (Console doesn't understand fsbtodb changes.) | |
252 | */ | |
253 | fs->fs_sparecon[0] = fs->fs_fsbtodb; | |
254 | #endif | |
255 | i = fs->fs_fsize / size; | |
256 | for (fs->fs_fsbtodb = 0; i > 1; i >>= 1) | |
257 | fs->fs_fsbtodb++; | |
258 | #endif SECSIZE | |
259 | fs->fs_dbsize = size; | |
260 | } | |
71e4e98b | 261 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
5adcb337 KM |
262 | base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK, |
263 | M_WAITOK); | |
71e4e98b SL |
264 | for (i = 0; i < blks; i += fs->fs_frag) { |
265 | size = fs->fs_bsize; | |
266 | if (i + fs->fs_frag > blks) | |
267 | size = (blks - i) * fs->fs_fsize; | |
ec67a3ce MK |
268 | #ifdef SECSIZE |
269 | tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size, | |
270 | fs->fs_dbsize); | |
271 | #else SECSIZE | |
a937f856 KM |
272 | error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, |
273 | NOCRED, &bp); | |
7188ac27 | 274 | if (error) { |
5adcb337 | 275 | free((caddr_t)base, M_SUPERBLK); |
71e4e98b SL |
276 | goto out; |
277 | } | |
e018935f | 278 | bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size); |
60f9c9e3 | 279 | fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; |
71e4e98b | 280 | space += size; |
e018935f MK |
281 | brelse(bp); |
282 | bp = NULL; | |
71e4e98b | 283 | } |
82161bc8 KM |
284 | mp->mnt_data = (qaddr_t)ump; |
285 | mp->mnt_stat.f_fsid.val[0] = (long)dev; | |
286 | mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS; | |
287 | mp->mnt_flag |= MNT_LOCAL; | |
7188ac27 KM |
288 | ump->um_mountp = mp; |
289 | ump->um_dev = dev; | |
290 | ump->um_devvp = devvp; | |
8dc876c1 KM |
291 | for (i = 0; i < MAXQUOTAS; i++) |
292 | ump->um_quotas[i] = NULLVP; | |
0f93ba7b | 293 | devvp->v_specflags |= SI_MOUNTEDON; |
7188ac27 | 294 | |
94354803 KM |
295 | /* Sanity checks for old file systems. XXX */ |
296 | fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */ | |
297 | fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */ | |
2af59000 KM |
298 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ |
299 | fs->fs_nrpos = 8; /* XXX */ | |
609e7cfa | 300 | |
7188ac27 | 301 | return (0); |
71e4e98b | 302 | out: |
c86c9b6e KM |
303 | if (bp) |
304 | brelse(bp); | |
609e7cfa | 305 | if (needclose) |
a937f856 | 306 | (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); |
8dc876c1 | 307 | if (ump) { |
7188ac27 | 308 | free((caddr_t)ump->um_fs, M_SUPERBLK); |
8dc876c1 | 309 | free((caddr_t)ump, M_UFSMNT); |
82161bc8 | 310 | mp->mnt_data = (qaddr_t)0; |
27d00e76 | 311 | } |
7188ac27 | 312 | return (error); |
71e4e98b SL |
313 | } |
314 | ||
5bf9d21f KM |
315 | /* |
316 | * Make a filesystem operational. | |
317 | * Nothing to do at the moment. | |
318 | */ | |
31593ba7 | 319 | /* ARGSUSED */ |
5bf9d21f KM |
320 | ufs_start(mp, flags) |
321 | struct mount *mp; | |
322 | int flags; | |
323 | { | |
324 | ||
325 | return (0); | |
326 | } | |
71e4e98b | 327 | |
7188ac27 KM |
328 | /* |
329 | * unmount system call | |
330 | */ | |
8dc876c1 | 331 | ufs_unmount(mp, mntflags) |
7188ac27 | 332 | struct mount *mp; |
8dc876c1 | 333 | int mntflags; |
71e4e98b | 334 | { |
7188ac27 | 335 | register struct ufsmount *ump; |
71e4e98b | 336 | register struct fs *fs; |
8dc876c1 | 337 | int i, error, ronly, flags = 0; |
71e4e98b | 338 | |
8dc876c1 | 339 | if (mntflags & MNT_FORCE) |
7188ac27 | 340 | return (EINVAL); |
8dc876c1 KM |
341 | if (mntflags & MNT_FORCE) |
342 | flags |= FORCECLOSE; | |
5d96a9ad KM |
343 | mntflushbuf(mp, 0); |
344 | if (mntinvalbuf(mp)) | |
345 | return (EBUSY); | |
7188ac27 | 346 | ump = VFSTOUFS(mp); |
ec67a3ce | 347 | return (error); |
71e4e98b | 348 | #ifdef QUOTA |
82161bc8 | 349 | if (mp->mnt_flag & MNT_QUOTA) { |
8dc876c1 | 350 | if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) |
6d943995 | 351 | return (error); |
8dc876c1 KM |
352 | for (i = 0; i < MAXQUOTAS; i++) { |
353 | if (ump->um_quotas[i] == NULLVP) | |
354 | continue; | |
355 | quotaoff(mp, i); | |
356 | } | |
6d943995 | 357 | /* |
8dc876c1 KM |
358 | * Here we fall through to vflush again to ensure |
359 | * that we have gotten rid of all the system vnodes. | |
6d943995 | 360 | */ |
8dc876c1 | 361 | } |
71e4e98b | 362 | #endif |
8dc876c1 | 363 | if (error = vflush(mp, NULLVP, flags)) |
6d943995 | 364 | return (error); |
7188ac27 KM |
365 | fs = ump->um_fs; |
366 | ronly = !fs->fs_ronly; | |
ec67a3ce MK |
367 | error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE); |
368 | irele(ip); | |
369 | return (error); | |
71e4e98b SL |
370 | } |
371 | ||
7188ac27 KM |
372 | /* |
373 | * Return root of a filesystem | |
374 | */ | |
375 | ufs_root(mp, vpp) | |
376 | struct mount *mp; | |
377 | struct vnode **vpp; | |
378 | { | |
31593ba7 KM |
379 | register struct inode *ip; |
380 | struct inode *nip; | |
381 | struct vnode tvp; | |
7188ac27 KM |
382 | int error; |
383 | ||
31593ba7 KM |
384 | tvp.v_mount = mp; |
385 | ip = VTOI(&tvp); | |
386 | ip->i_vnode = &tvp; | |
387 | ip->i_dev = VFSTOUFS(mp)->um_dev; | |
388 | error = iget(ip, (ino_t)ROOTINO, &nip); | |
7188ac27 KM |
389 | if (error) |
390 | return (error); | |
31593ba7 | 391 | *vpp = ITOV(nip); |
7188ac27 KM |
392 | return (0); |
393 | } | |
394 | ||
8dc876c1 KM |
395 | /* |
396 | * Do operations associated with quotas | |
397 | */ | |
398 | ufs_quotactl(mp, cmds, uid, arg) | |
399 | struct mount *mp; | |
400 | int cmds; | |
401 | uid_t uid; | |
402 | caddr_t arg; | |
403 | { | |
404 | register struct nameidata *ndp = &u.u_nd; | |
405 | struct ufsmount *ump = VFSTOUFS(mp); | |
8e940f59 | 406 | struct proc *p = u.u_procp; /* XXX */ |
8dc876c1 KM |
407 | int cmd, type, error; |
408 | ||
409 | #ifndef QUOTA | |
410 | return (EOPNOTSUPP); | |
411 | #else | |
412 | if (uid == -1) | |
8e940f59 | 413 | uid = p->p_ruid; |
8dc876c1 KM |
414 | cmd = cmds >> SUBCMDSHIFT; |
415 | ||
416 | switch (cmd) { | |
417 | case Q_GETQUOTA: | |
418 | case Q_SYNC: | |
8e940f59 | 419 | if (uid == p->p_ruid) |
8dc876c1 KM |
420 | break; |
421 | /* fall through */ | |
422 | default: | |
423 | if (error = suser(ndp->ni_cred, &u.u_acflag)) | |
424 | return (error); | |
425 | } | |
426 | ||
427 | type = cmd & SUBCMDMASK; | |
428 | if ((u_int)type >= MAXQUOTAS) | |
429 | return (EINVAL); | |
430 | ||
431 | switch (cmd) { | |
432 | ||
433 | case Q_QUOTAON: | |
434 | return (quotaon(ndp, mp, type, arg)); | |
435 | ||
436 | case Q_QUOTAOFF: | |
437 | if (vfs_busy(mp)) | |
438 | return (0); | |
439 | error = quotaoff(mp, type); | |
440 | vfs_unbusy(mp); | |
441 | return (error); | |
442 | ||
443 | case Q_SETQUOTA: | |
444 | return (setquota(mp, uid, type, arg)); | |
445 | ||
446 | case Q_SETUSE: | |
447 | return (setuse(mp, uid, type, arg)); | |
448 | ||
449 | case Q_GETQUOTA: | |
450 | return (getquota(mp, uid, type, arg)); | |
451 | ||
452 | case Q_SYNC: | |
453 | if (vfs_busy(mp)) | |
454 | return (0); | |
455 | error = qsync(mp); | |
456 | vfs_unbusy(mp); | |
457 | return (error); | |
458 | ||
459 | default: | |
460 | return (EINVAL); | |
461 | } | |
462 | /* NOTREACHED */ | |
463 | #endif | |
464 | } | |
465 | ||
7188ac27 KM |
466 | /* |
467 | * Get file system statistics. | |
468 | */ | |
469 | ufs_statfs(mp, sbp) | |
470 | struct mount *mp; | |
471 | register struct statfs *sbp; | |
472 | { | |
473 | register struct ufsmount *ump; | |
474 | register struct fs *fs; | |
475 | ||
476 | ump = VFSTOUFS(mp); | |
477 | fs = ump->um_fs; | |
478 | if (fs->fs_magic != FS_MAGIC) | |
479 | panic("ufs_statfs"); | |
480 | sbp->f_type = MOUNT_UFS; | |
7188ac27 KM |
481 | sbp->f_fsize = fs->fs_fsize; |
482 | sbp->f_bsize = fs->fs_bsize; | |
483 | sbp->f_blocks = fs->fs_dsize; | |
484 | sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + | |
485 | fs->fs_cstotal.cs_nffree; | |
486 | sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - | |
487 | (fs->fs_dsize - sbp->f_bfree); | |
5c41c19e | 488 | sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; |
7188ac27 | 489 | sbp->f_ffree = fs->fs_cstotal.cs_nifree; |
82161bc8 KM |
490 | if (sbp != &mp->mnt_stat) { |
491 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, | |
d45de50d | 492 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
82161bc8 | 493 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
d45de50d KM |
494 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
495 | } | |
7188ac27 KM |
496 | return (0); |
497 | } | |
498 | ||
499 | int syncprt = 0; | |
500 | ||
501 | /* | |
502 | * Go through the disk queues to initiate sandbagged IO; | |
503 | * go through the inodes to write those that have been modified; | |
504 | * initiate the writing of the super block if it has been modified. | |
8dc876c1 KM |
505 | * |
506 | * Note: we are always called with the filesystem marked `MPBUSY'. | |
7188ac27 KM |
507 | */ |
508 | ufs_sync(mp, waitfor) | |
71e4e98b | 509 | struct mount *mp; |
7188ac27 | 510 | int waitfor; |
71e4e98b | 511 | { |
31593ba7 | 512 | register struct vnode *vp; |
7188ac27 KM |
513 | register struct inode *ip; |
514 | register struct ufsmount *ump = VFSTOUFS(mp); | |
515 | register struct fs *fs; | |
812b91f3 | 516 | int error, allerror = 0; |
7188ac27 KM |
517 | |
518 | if (syncprt) | |
519 | bufstats(); | |
7188ac27 | 520 | fs = ump->um_fs; |
7188ac27 KM |
521 | /* |
522 | * Write back modified superblock. | |
523 | * Consistency check that the superblock | |
524 | * is still in the buffer cache. | |
525 | */ | |
526 | if (fs->fs_fmod != 0) { | |
527 | if (fs->fs_ronly != 0) { /* XXX */ | |
528 | printf("fs = %s\n", fs->fs_fsmnt); | |
529 | panic("update: rofs mod"); | |
530 | } | |
531 | fs->fs_fmod = 0; | |
532 | fs->fs_time = time.tv_sec; | |
881f1b87 | 533 | allerror = sbupdate(ump, waitfor); |
7188ac27 KM |
534 | } |
535 | /* | |
536 | * Write back each (modified) inode. | |
537 | */ | |
25b5cf58 | 538 | loop: |
a242f429 KM |
539 | for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) { |
540 | /* | |
541 | * If the vnode that we are about to sync is no longer | |
542 | * associated with this mount point, start over. | |
543 | */ | |
544 | if (vp->v_mount != mp) | |
545 | goto loop; | |
31593ba7 | 546 | ip = VTOI(vp); |
25b5cf58 KM |
547 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 && |
548 | vp->v_dirtyblkhd == NULL) | |
7188ac27 | 549 | continue; |
25b5cf58 KM |
550 | if (vget(vp)) |
551 | goto loop; | |
552 | if (vp->v_dirtyblkhd) | |
553 | vflushbuf(vp, 0); | |
554 | if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) && | |
555 | (error = iupdat(ip, &time, &time, 0))) | |
812b91f3 KM |
556 | allerror = error; |
557 | vput(vp); | |
7188ac27 | 558 | } |
7188ac27 | 559 | /* |
5d96a9ad | 560 | * Force stale file system control information to be flushed. |
7188ac27 | 561 | */ |
5d96a9ad | 562 | vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0); |
8dc876c1 KM |
563 | #ifdef QUOTA |
564 | qsync(mp); | |
565 | #endif | |
812b91f3 | 566 | return (allerror); |
7188ac27 KM |
567 | } |
568 | ||
569 | /* | |
570 | * Write a superblock and associated information back to disk. | |
571 | */ | |
572 | sbupdate(mp, waitfor) | |
573 | struct ufsmount *mp; | |
574 | int waitfor; | |
575 | { | |
576 | register struct fs *fs = mp->um_fs; | |
71e4e98b SL |
577 | register struct buf *bp; |
578 | int blks; | |
579 | caddr_t space; | |
7188ac27 | 580 | int i, size, error = 0; |
71e4e98b | 581 | |
ec67a3ce MK |
582 | #ifdef SECSIZE |
583 | bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize), | |
584 | (int)fs->fs_sbsize, fs->fs_dbsize); | |
585 | #else SECSIZE | |
7188ac27 | 586 | bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize); |
ec67a3ce | 587 | #endif SECSIZE |
71e4e98b | 588 | bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize); |
2af59000 KM |
589 | /* Restore compatibility to old file systems. XXX */ |
590 | if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ | |
591 | bp->b_un.b_fs->fs_nrpos = -1; /* XXX */ | |
ec67a3ce MK |
592 | #ifdef SECSIZE |
593 | #ifdef tahoe | |
594 | /* restore standard fsbtodb shift */ | |
595 | bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0]; | |
596 | bp->b_un.b_fs->fs_sparecon[0] = 0; | |
597 | #endif | |
598 | #endif SECSIZE | |
7188ac27 KM |
599 | if (waitfor == MNT_WAIT) |
600 | error = bwrite(bp); | |
601 | else | |
602 | bawrite(bp); | |
71e4e98b SL |
603 | blks = howmany(fs->fs_cssize, fs->fs_fsize); |
604 | space = (caddr_t)fs->fs_csp[0]; | |
605 | for (i = 0; i < blks; i += fs->fs_frag) { | |
606 | size = fs->fs_bsize; | |
607 | if (i + fs->fs_frag > blks) | |
608 | size = (blks - i) * fs->fs_fsize; | |
ec67a3ce MK |
609 | #ifdef SECSIZE |
610 | bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size, | |
611 | fs->fs_dbsize); | |
612 | #else SECSIZE | |
7188ac27 | 613 | bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size); |
ec67a3ce | 614 | #endif SECSIZE |
71e4e98b SL |
615 | bcopy(space, bp->b_un.b_addr, (u_int)size); |
616 | space += size; | |
7188ac27 KM |
617 | if (waitfor == MNT_WAIT) |
618 | error = bwrite(bp); | |
619 | else | |
620 | bawrite(bp); | |
71e4e98b | 621 | } |
7188ac27 | 622 | return (error); |
71e4e98b SL |
623 | } |
624 | ||
625 | /* | |
7188ac27 KM |
626 | * Print out statistics on the current allocation of the buffer pool. |
627 | * Can be enabled to print out on every ``sync'' by setting "syncprt" | |
628 | * above. | |
629 | */ | |
630 | bufstats() | |
631 | { | |
632 | int s, i, j, count; | |
633 | register struct buf *bp, *dp; | |
634 | int counts[MAXBSIZE/CLBYTES+1]; | |
635 | static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" }; | |
636 | ||
637 | for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) { | |
638 | count = 0; | |
639 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) | |
640 | counts[j] = 0; | |
641 | s = splbio(); | |
642 | for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) { | |
643 | counts[dp->b_bufsize/CLBYTES]++; | |
644 | count++; | |
645 | } | |
646 | splx(s); | |
647 | printf("%s: total-%d", bname[i], count); | |
648 | for (j = 0; j <= MAXBSIZE/CLBYTES; j++) | |
649 | if (counts[j] != 0) | |
650 | printf(", %d-%d", j * CLBYTES, counts[j]); | |
651 | printf("\n"); | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * File handle to vnode | |
113c35f2 KM |
657 | * |
658 | * Have to be really careful about stale file handles: | |
659 | * - check that the inode number is in range | |
660 | * - call iget() to get the locked inode | |
661 | * - check for an unallocated inode (i_mode == 0) | |
662 | * - check that the generation number matches | |
7188ac27 KM |
663 | */ |
664 | ufs_fhtovp(mp, fhp, vpp) | |
113c35f2 | 665 | register struct mount *mp; |
7188ac27 KM |
666 | struct fid *fhp; |
667 | struct vnode **vpp; | |
668 | { | |
669 | register struct ufid *ufhp; | |
113c35f2 | 670 | register struct fs *fs; |
31593ba7 KM |
671 | register struct inode *ip; |
672 | struct inode *nip; | |
673 | struct vnode tvp; | |
7188ac27 KM |
674 | int error; |
675 | ||
676 | ufhp = (struct ufid *)fhp; | |
113c35f2 KM |
677 | fs = VFSTOUFS(mp)->um_fs; |
678 | if (ufhp->ufid_ino < ROOTINO || | |
679 | ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) { | |
82161bc8 | 680 | *vpp = NULLVP; |
113c35f2 KM |
681 | return (EINVAL); |
682 | } | |
31593ba7 KM |
683 | tvp.v_mount = mp; |
684 | ip = VTOI(&tvp); | |
685 | ip->i_vnode = &tvp; | |
686 | ip->i_dev = VFSTOUFS(mp)->um_dev; | |
687 | if (error = iget(ip, ufhp->ufid_ino, &nip)) { | |
82161bc8 | 688 | *vpp = NULLVP; |
7188ac27 KM |
689 | return (error); |
690 | } | |
31593ba7 | 691 | ip = nip; |
113c35f2 KM |
692 | if (ip->i_mode == 0) { |
693 | iput(ip); | |
82161bc8 | 694 | *vpp = NULLVP; |
113c35f2 KM |
695 | return (EINVAL); |
696 | } | |
7188ac27 KM |
697 | if (ip->i_gen != ufhp->ufid_gen) { |
698 | iput(ip); | |
82161bc8 | 699 | *vpp = NULLVP; |
7188ac27 KM |
700 | return (EINVAL); |
701 | } | |
702 | *vpp = ITOV(ip); | |
703 | return (0); | |
704 | } | |
705 | ||
706 | /* | |
29e77c27 | 707 | * Vnode pointer to File handle |
7188ac27 KM |
708 | */ |
709 | /* ARGSUSED */ | |
758e3529 KM |
710 | ufs_vptofh(vp, fhp) |
711 | struct vnode *vp; | |
7188ac27 | 712 | struct fid *fhp; |
7188ac27 | 713 | { |
758e3529 KM |
714 | register struct inode *ip = VTOI(vp); |
715 | register struct ufid *ufhp; | |
7188ac27 | 716 | |
758e3529 KM |
717 | ufhp = (struct ufid *)fhp; |
718 | ufhp->ufid_len = sizeof(struct ufid); | |
719 | ufhp->ufid_ino = ip->i_number; | |
720 | ufhp->ufid_gen = ip->i_gen; | |
721 | return (0); | |
7188ac27 KM |
722 | } |
723 | ||
724 | /* | |
71e4e98b SL |
725 | * Check that the user's argument is a reasonable |
726 | * thing on which to mount, and return the device number if so. | |
727 | */ | |
7188ac27 KM |
728 | getmdev(devvpp, fname, ndp) |
729 | struct vnode **devvpp; | |
715baff1 | 730 | caddr_t fname; |
7188ac27 | 731 | register struct nameidata *ndp; |
71e4e98b | 732 | { |
7188ac27 KM |
733 | register struct vnode *vp; |
734 | int error; | |
71e4e98b | 735 | |
6c845185 | 736 | ndp->ni_nameiop = LOOKUP | FOLLOW; |
715baff1 KM |
737 | ndp->ni_segflg = UIO_USERSPACE; |
738 | ndp->ni_dirp = fname; | |
43c93704 | 739 | if (error = namei(ndp)) |
7188ac27 | 740 | return (error); |
7188ac27 KM |
741 | vp = ndp->ni_vp; |
742 | if (vp->v_type != VBLK) { | |
6c845185 | 743 | vrele(vp); |
71e4e98b | 744 | return (ENOTBLK); |
e95cdf5c | 745 | } |
e547d435 | 746 | if (major(vp->v_rdev) >= nblkdev) { |
6c845185 | 747 | vrele(vp); |
71e4e98b | 748 | return (ENXIO); |
e547d435 | 749 | } |
7188ac27 | 750 | *devvpp = vp; |
71e4e98b SL |
751 | return (0); |
752 | } |