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1.1 root 1: /*
2: * Copyright (c) 1989, 1991 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)ufs_vfsops.c 7.56 (Berkeley) 6/28/91
34: */
35:
36: #include "param.h"
37: #include "systm.h"
38: #include "namei.h"
39: #include "proc.h"
40: #include "kernel.h"
41: #include "vnode.h"
42: #include "specdev.h"
43: #include "mount.h"
44: #include "buf.h"
45: #include "file.h"
1.1.1.2 ! root 46: #include "dkbad.h" /* XXX */
1.1 root 47: #include "disklabel.h"
48: #include "ioctl.h"
49: #include "errno.h"
50: #include "malloc.h"
51:
52: #include "quota.h"
53: #include "fs.h"
54: #include "ufsmount.h"
55: #include "inode.h"
56:
57: struct vfsops ufs_vfsops = {
58: ufs_mount,
59: ufs_start,
60: ufs_unmount,
61: ufs_root,
62: ufs_quotactl,
63: ufs_statfs,
64: ufs_sync,
65: ufs_fhtovp,
66: ufs_vptofh,
67: ufs_init
68: };
69:
70: /*
71: * Flag to allow forcible unmounting.
72: */
73: int doforce = 1;
74:
75: /*
76: * Called by vfs_mountroot when ufs is going to be mounted as root.
77: *
78: * Name is updated by mount(8) after booting.
79: */
80: #define ROOTNAME "root_device"
81:
82: ufs_mountroot()
83: {
84: register struct mount *mp;
85: extern struct vnode *rootvp;
86: struct proc *p = curproc; /* XXX */
87: struct ufsmount *ump;
88: register struct fs *fs;
89: u_int size;
90: int error;
91:
92: mp = (struct mount *)malloc((u_long)sizeof(struct mount),
93: M_MOUNT, M_WAITOK);
94: mp->mnt_op = &ufs_vfsops;
95: mp->mnt_flag = MNT_RDONLY;
96: mp->mnt_exroot = 0;
97: mp->mnt_mounth = NULLVP;
98: error = mountfs(rootvp, mp, p);
99: if (error) {
100: free((caddr_t)mp, M_MOUNT);
101: return (error);
102: }
103: if (error = vfs_lock(mp)) {
104: (void)ufs_unmount(mp, 0, p);
105: free((caddr_t)mp, M_MOUNT);
106: return (error);
107: }
108: rootfs = mp;
109: mp->mnt_next = mp;
110: mp->mnt_prev = mp;
111: mp->mnt_vnodecovered = NULLVP;
112: ump = VFSTOUFS(mp);
113: fs = ump->um_fs;
114: bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
115: fs->fs_fsmnt[0] = '/';
116: bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
117: MNAMELEN);
118: (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
119: &size);
120: bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
121: (void) ufs_statfs(mp, &mp->mnt_stat, p);
122: vfs_unlock(mp);
123: inittodr(fs->fs_time);
124: return (0);
125: }
126:
127: /*
128: * VFS Operations.
129: *
130: * mount system call
131: */
132: ufs_mount(mp, path, data, ndp, p)
133: register struct mount *mp;
134: char *path;
135: caddr_t data;
136: struct nameidata *ndp;
137: struct proc *p;
138: {
139: struct vnode *devvp;
140: struct ufs_args args;
141: struct ufsmount *ump;
142: register struct fs *fs;
143: u_int size;
144: int error;
145:
146: if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
147: return (error);
148: /*
149: * Process export requests.
150: */
151: if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
152: if (args.exflags & MNT_EXPORTED)
153: mp->mnt_flag |= MNT_EXPORTED;
154: else
155: mp->mnt_flag &= ~MNT_EXPORTED;
156: if (args.exflags & MNT_EXRDONLY)
157: mp->mnt_flag |= MNT_EXRDONLY;
158: else
159: mp->mnt_flag &= ~MNT_EXRDONLY;
160: mp->mnt_exroot = args.exroot;
161: }
162: /*
163: * If updating, check whether changing from read-only to
164: * read/write; if there is no device name, that's all we do.
165: */
166: if (mp->mnt_flag & MNT_UPDATE) {
167: ump = VFSTOUFS(mp);
168: fs = ump->um_fs;
169: if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
170: fs->fs_ronly = 0;
171: if (args.fspec == 0)
172: return (0);
173: }
174: /*
175: * Not an update, or updating the name: look up the name
176: * and verify that it refers to a sensible block device.
177: */
178: ndp->ni_nameiop = LOOKUP | FOLLOW;
179: ndp->ni_segflg = UIO_USERSPACE;
180: ndp->ni_dirp = args.fspec;
181: if (error = namei(ndp, p))
182: return (error);
183: devvp = ndp->ni_vp;
184: if (devvp->v_type != VBLK) {
185: vrele(devvp);
186: return (ENOTBLK);
187: }
188: if (major(devvp->v_rdev) >= nblkdev) {
189: vrele(devvp);
190: return (ENXIO);
191: }
192: if ((mp->mnt_flag & MNT_UPDATE) == 0)
193: error = mountfs(devvp, mp, p);
194: else {
195: if (devvp != ump->um_devvp)
196: error = EINVAL; /* needs translation */
197: else
198: vrele(devvp);
199: }
200: if (error) {
201: vrele(devvp);
202: return (error);
203: }
204: ump = VFSTOUFS(mp);
205: fs = ump->um_fs;
206: (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
207: bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
208: bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
209: MNAMELEN);
210: (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
211: &size);
212: bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
213: (void) ufs_statfs(mp, &mp->mnt_stat, p);
214: return (0);
215: }
216:
217: /*
218: * Common code for mount and mountroot
219: */
220: mountfs(devvp, mp, p)
221: register struct vnode *devvp;
222: struct mount *mp;
223: struct proc *p;
224: {
225: register struct ufsmount *ump = (struct ufsmount *)0;
226: struct buf *bp = NULL;
227: register struct fs *fs;
228: dev_t dev = devvp->v_rdev;
229: struct partinfo dpart;
230: caddr_t base, space;
231: int havepart = 0, blks;
232: int error, i, size;
233: int needclose = 0;
234: int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
235: extern struct vnode *rootvp;
236:
237: /*
238: * Disallow multiple mounts of the same device.
239: * Disallow mounting of a device that is currently in use
240: * (except for root, which might share swap device for miniroot).
241: * Flush out any old buffers remaining from a previous use.
242: */
243: if (error = mountedon(devvp))
244: return (error);
245: if (vcount(devvp) > 1 && devvp != rootvp)
246: return (EBUSY);
247: vinvalbuf(devvp, 1);
248: if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p))
249: return (error);
250: needclose = 1;
251: if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
252: size = DEV_BSIZE;
253: else {
254: havepart = 1;
255: size = dpart.disklab->d_secsize;
256: }
257: if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
258: goto out;
259: fs = bp->b_un.b_fs;
260: if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
261: fs->fs_bsize < sizeof(struct fs)) {
262: error = EINVAL; /* XXX needs translation */
263: goto out;
264: }
265: ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
266: ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK,
267: M_WAITOK);
268: bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs,
269: (u_int)fs->fs_sbsize);
270: if (fs->fs_sbsize < SBSIZE)
271: bp->b_flags |= B_INVAL;
272: brelse(bp);
273: bp = NULL;
274: fs = ump->um_fs;
275: fs->fs_ronly = ronly;
276: if (ronly == 0)
277: fs->fs_fmod = 1;
278: if (havepart) {
279: dpart.part->p_fstype = FS_BSDFFS;
280: dpart.part->p_fsize = fs->fs_fsize;
281: dpart.part->p_frag = fs->fs_frag;
282: dpart.part->p_cpg = fs->fs_cpg;
283: }
284: blks = howmany(fs->fs_cssize, fs->fs_fsize);
285: base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK,
286: M_WAITOK);
287: for (i = 0; i < blks; i += fs->fs_frag) {
288: size = fs->fs_bsize;
289: if (i + fs->fs_frag > blks)
290: size = (blks - i) * fs->fs_fsize;
291: error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
292: NOCRED, &bp);
293: if (error) {
294: free((caddr_t)base, M_SUPERBLK);
295: goto out;
296: }
297: bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size);
298: fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
299: space += size;
300: brelse(bp);
301: bp = NULL;
302: }
303: mp->mnt_data = (qaddr_t)ump;
304: mp->mnt_stat.f_fsid.val[0] = (long)dev;
305: mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
306: mp->mnt_flag |= MNT_LOCAL;
307: ump->um_mountp = mp;
308: ump->um_dev = dev;
309: ump->um_devvp = devvp;
310: for (i = 0; i < MAXQUOTAS; i++)
311: ump->um_quotas[i] = NULLVP;
312: devvp->v_specflags |= SI_MOUNTEDON;
313:
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 */
317: if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
318: fs->fs_nrpos = 8; /* XXX */
319: return (0);
320: out:
321: if (bp)
322: brelse(bp);
323: if (needclose)
324: (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
325: if (ump) {
326: free((caddr_t)ump->um_fs, M_SUPERBLK);
327: free((caddr_t)ump, M_UFSMNT);
328: mp->mnt_data = (qaddr_t)0;
329: }
330: return (error);
331: }
332:
333: /*
334: * Make a filesystem operational.
335: * Nothing to do at the moment.
336: */
337: /* ARGSUSED */
338: ufs_start(mp, flags, p)
339: struct mount *mp;
340: int flags;
341: struct proc *p;
342: {
343:
344: return (0);
345: }
346:
347: /*
348: * unmount system call
349: */
350: ufs_unmount(mp, mntflags, p)
351: struct mount *mp;
352: int mntflags;
353: struct proc *p;
354: {
355: register struct ufsmount *ump;
356: register struct fs *fs;
357: int i, error, ronly, flags = 0;
358:
359: if (mntflags & MNT_FORCE) {
360: if (!doforce || mp == rootfs)
361: return (EINVAL);
362: flags |= FORCECLOSE;
363: }
364: mntflushbuf(mp, 0);
365: if (mntinvalbuf(mp))
366: return (EBUSY);
367: ump = VFSTOUFS(mp);
368: #ifdef QUOTA
369: if (mp->mnt_flag & MNT_QUOTA) {
370: if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags))
371: return (error);
372: for (i = 0; i < MAXQUOTAS; i++) {
373: if (ump->um_quotas[i] == NULLVP)
374: continue;
375: quotaoff(p, mp, i);
376: }
377: /*
378: * Here we fall through to vflush again to ensure
379: * that we have gotten rid of all the system vnodes.
380: */
381: }
382: #endif
383: if (error = vflush(mp, NULLVP, flags))
384: return (error);
385: fs = ump->um_fs;
386: ronly = !fs->fs_ronly;
387: ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
388: error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
389: NOCRED, p);
390: vrele(ump->um_devvp);
391: free((caddr_t)fs->fs_csp[0], M_SUPERBLK);
392: free((caddr_t)fs, M_SUPERBLK);
393: free((caddr_t)ump, M_UFSMNT);
394: mp->mnt_data = (qaddr_t)0;
395: mp->mnt_flag &= ~MNT_LOCAL;
396: return (error);
397: }
398:
399: /*
400: * Check to see if a filesystem is mounted on a block device.
401: */
402: mountedon(vp)
403: register struct vnode *vp;
404: {
405: register struct vnode *vq;
406:
407: if (vp->v_specflags & SI_MOUNTEDON)
408: return (EBUSY);
409: if (vp->v_flag & VALIASED) {
410: for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) {
411: if (vq->v_rdev != vp->v_rdev ||
412: vq->v_type != vp->v_type)
413: continue;
414: if (vq->v_specflags & SI_MOUNTEDON)
415: return (EBUSY);
416: }
417: }
418: return (0);
419: }
420:
421: /*
422: * Return root of a filesystem
423: */
424: ufs_root(mp, vpp)
425: struct mount *mp;
426: struct vnode **vpp;
427: {
428: register struct inode *ip;
429: struct inode *nip;
430: struct vnode tvp;
431: int error;
432:
433: tvp.v_mount = mp;
434: ip = VTOI(&tvp);
435: ip->i_vnode = &tvp;
436: ip->i_dev = VFSTOUFS(mp)->um_dev;
437: error = iget(ip, (ino_t)ROOTINO, &nip);
438: if (error)
439: return (error);
440: *vpp = ITOV(nip);
441: return (0);
442: }
443:
444: /*
445: * Do operations associated with quotas
446: */
447: ufs_quotactl(mp, cmds, uid, arg, p)
448: struct mount *mp;
449: int cmds;
450: uid_t uid;
451: caddr_t arg;
452: struct proc *p;
453: {
454: struct ufsmount *ump = VFSTOUFS(mp);
455: int cmd, type, error;
456:
457: #ifndef QUOTA
458: return (EOPNOTSUPP);
459: #else
460: if (uid == -1)
461: uid = p->p_cred->p_ruid;
462: cmd = cmds >> SUBCMDSHIFT;
463:
464: switch (cmd) {
465: case Q_GETQUOTA:
466: case Q_SYNC:
467: if (uid == p->p_cred->p_ruid)
468: break;
469: /* fall through */
470: default:
471: if (error = suser(p->p_ucred, &p->p_acflag))
472: return (error);
473: }
474:
475: type = cmd & SUBCMDMASK;
476: if ((u_int)type >= MAXQUOTAS)
477: return (EINVAL);
478:
479: switch (cmd) {
480:
481: case Q_QUOTAON:
482: return (quotaon(p, mp, type, arg));
483:
484: case Q_QUOTAOFF:
485: if (vfs_busy(mp))
486: return (0);
487: error = quotaoff(p, mp, type);
488: vfs_unbusy(mp);
489: return (error);
490:
491: case Q_SETQUOTA:
492: return (setquota(mp, uid, type, arg));
493:
494: case Q_SETUSE:
495: return (setuse(mp, uid, type, arg));
496:
497: case Q_GETQUOTA:
498: return (getquota(mp, uid, type, arg));
499:
500: case Q_SYNC:
501: if (vfs_busy(mp))
502: return (0);
503: error = qsync(mp);
504: vfs_unbusy(mp);
505: return (error);
506:
507: default:
508: return (EINVAL);
509: }
510: /* NOTREACHED */
511: #endif
512: }
513:
514: /*
515: * Get file system statistics.
516: */
517: ufs_statfs(mp, sbp, p)
518: struct mount *mp;
519: register struct statfs *sbp;
520: struct proc *p;
521: {
522: register struct ufsmount *ump;
523: register struct fs *fs;
524:
525: ump = VFSTOUFS(mp);
526: fs = ump->um_fs;
527: if (fs->fs_magic != FS_MAGIC)
528: panic("ufs_statfs");
529: sbp->f_type = MOUNT_UFS;
530: sbp->f_fsize = fs->fs_fsize;
531: sbp->f_bsize = fs->fs_bsize;
532: sbp->f_blocks = fs->fs_dsize;
533: sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
534: fs->fs_cstotal.cs_nffree;
535: sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) -
536: (fs->fs_dsize - sbp->f_bfree);
537: sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
538: sbp->f_ffree = fs->fs_cstotal.cs_nifree;
539: if (sbp != &mp->mnt_stat) {
540: bcopy((caddr_t)mp->mnt_stat.f_mntonname,
541: (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
542: bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
543: (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
544: }
545: return (0);
546: }
547:
548: int syncprt = 0;
549:
550: /*
551: * Go through the disk queues to initiate sandbagged IO;
552: * go through the inodes to write those that have been modified;
553: * initiate the writing of the super block if it has been modified.
554: *
555: * Note: we are always called with the filesystem marked `MPBUSY'.
556: */
557: ufs_sync(mp, waitfor)
558: struct mount *mp;
559: int waitfor;
560: {
561: register struct vnode *vp;
562: register struct inode *ip;
563: register struct ufsmount *ump = VFSTOUFS(mp);
564: register struct fs *fs;
565: int error, allerror = 0;
566:
567: if (syncprt)
568: bufstats();
569: fs = ump->um_fs;
570: /*
571: * Write back modified superblock.
572: * Consistency check that the superblock
573: * is still in the buffer cache.
574: */
575: if (fs->fs_fmod != 0) {
576: if (fs->fs_ronly != 0) { /* XXX */
577: printf("fs = %s\n", fs->fs_fsmnt);
578: panic("update: rofs mod");
579: }
580: fs->fs_fmod = 0;
581: fs->fs_time = time.tv_sec;
582: allerror = sbupdate(ump, waitfor);
583: }
584: /*
585: * Write back each (modified) inode.
586: */
587: loop:
588: for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) {
589: /*
590: * If the vnode that we are about to sync is no longer
591: * associated with this mount point, start over.
592: */
593: if (vp->v_mount != mp)
594: goto loop;
595: if (VOP_ISLOCKED(vp))
596: continue;
597: ip = VTOI(vp);
598: if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 &&
599: vp->v_dirtyblkhd == NULL)
600: continue;
601: if (vget(vp))
602: goto loop;
603: if (vp->v_dirtyblkhd)
604: vflushbuf(vp, 0);
605: if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) &&
606: (error = iupdat(ip, &time, &time, 0)))
607: allerror = error;
608: vput(vp);
609: }
610: /*
611: * Force stale file system control information to be flushed.
612: */
613: vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0);
614: #ifdef QUOTA
615: qsync(mp);
616: #endif
617: return (allerror);
618: }
619:
620: /*
621: * Write a superblock and associated information back to disk.
622: */
623: sbupdate(mp, waitfor)
624: struct ufsmount *mp;
625: int waitfor;
626: {
627: register struct fs *fs = mp->um_fs;
628: register struct buf *bp;
629: int blks;
630: caddr_t space;
631: int i, size, error = 0;
632:
633: bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize);
634: bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize);
635: /* Restore compatibility to old file systems. XXX */
636: if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
637: bp->b_un.b_fs->fs_nrpos = -1; /* XXX */
638: if (waitfor == MNT_WAIT)
639: error = bwrite(bp);
640: else
641: bawrite(bp);
642: blks = howmany(fs->fs_cssize, fs->fs_fsize);
643: space = (caddr_t)fs->fs_csp[0];
644: for (i = 0; i < blks; i += fs->fs_frag) {
645: size = fs->fs_bsize;
646: if (i + fs->fs_frag > blks)
647: size = (blks - i) * fs->fs_fsize;
648: bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size);
649: bcopy(space, bp->b_un.b_addr, (u_int)size);
650: space += size;
651: if (waitfor == MNT_WAIT)
652: error = bwrite(bp);
653: else
654: bawrite(bp);
655: }
656: return (error);
657: }
658:
659: /*
660: * Print out statistics on the current allocation of the buffer pool.
661: * Can be enabled to print out on every ``sync'' by setting "syncprt"
662: * above.
663: */
664: bufstats()
665: {
666: int s, i, j, count;
667: register struct buf *bp, *dp;
668: int counts[MAXBSIZE/CLBYTES+1];
669: static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" };
670:
671: for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) {
672: count = 0;
673: for (j = 0; j <= MAXBSIZE/CLBYTES; j++)
674: counts[j] = 0;
675: s = splbio();
676: for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) {
677: counts[dp->b_bufsize/CLBYTES]++;
678: count++;
679: }
680: splx(s);
681: printf("%s: total-%d", bname[i], count);
682: for (j = 0; j <= MAXBSIZE/CLBYTES; j++)
683: if (counts[j] != 0)
684: printf(", %d-%d", j * CLBYTES, counts[j]);
685: printf("\n");
686: }
687: }
688:
689: /*
690: * File handle to vnode
691: *
692: * Have to be really careful about stale file handles:
693: * - check that the inode number is in range
694: * - call iget() to get the locked inode
695: * - check for an unallocated inode (i_mode == 0)
696: * - check that the generation number matches
697: */
698: ufs_fhtovp(mp, fhp, vpp)
699: register struct mount *mp;
700: struct fid *fhp;
701: struct vnode **vpp;
702: {
703: register struct ufid *ufhp;
704: register struct fs *fs;
705: register struct inode *ip;
706: struct inode *nip;
707: struct vnode tvp;
708: int error;
709:
710: ufhp = (struct ufid *)fhp;
711: fs = VFSTOUFS(mp)->um_fs;
712: if (ufhp->ufid_ino < ROOTINO ||
713: ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) {
714: *vpp = NULLVP;
715: return (EINVAL);
716: }
717: tvp.v_mount = mp;
718: ip = VTOI(&tvp);
719: ip->i_vnode = &tvp;
720: ip->i_dev = VFSTOUFS(mp)->um_dev;
721: if (error = iget(ip, ufhp->ufid_ino, &nip)) {
722: *vpp = NULLVP;
723: return (error);
724: }
725: ip = nip;
726: if (ip->i_mode == 0) {
727: iput(ip);
728: *vpp = NULLVP;
729: return (EINVAL);
730: }
731: if (ip->i_gen != ufhp->ufid_gen) {
732: iput(ip);
733: *vpp = NULLVP;
734: return (EINVAL);
735: }
736: *vpp = ITOV(ip);
737: return (0);
738: }
739:
740: /*
741: * Vnode pointer to File handle
742: */
743: /* ARGSUSED */
744: ufs_vptofh(vp, fhp)
745: struct vnode *vp;
746: struct fid *fhp;
747: {
748: register struct inode *ip = VTOI(vp);
749: register struct ufid *ufhp;
750:
751: ufhp = (struct ufid *)fhp;
752: ufhp->ufid_len = sizeof(struct ufid);
753: ufhp->ufid_ino = ip->i_number;
754: ufhp->ufid_gen = ip->i_gen;
755: return (0);
756: }
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