1/*
2 * modified for EXT2FS support in Lites 1.1
3 *
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
6 */
7/*
8 * Copyright (c) 1989, 1991, 1993, 1994
9 * The Regents of the University of California. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
| 1/*
2 * modified for EXT2FS support in Lites 1.1
3 *
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
6 */
7/*
8 * Copyright (c) 1989, 1991, 1993, 1994
9 * The Regents of the University of California. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
|
40 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_vfsops.c 71999 2001-02-04 13:13:25Z phk $
| 40 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_vfsops.c 72200 2001-02-09 06:11:45Z bmilekic $
|
41 */
42
43#include "opt_quota.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/namei.h>
48#include <sys/proc.h>
49#include <sys/kernel.h>
50#include <sys/vnode.h>
51#include <sys/mount.h>
52#include <sys/bio.h>
53#include <sys/buf.h>
54#include <sys/conf.h>
55#include <sys/fcntl.h>
56#include <sys/disklabel.h>
57#include <sys/malloc.h>
58#include <sys/stat.h>
59#include <sys/mutex.h>
60
61#include <ufs/ufs/extattr.h>
62#include <ufs/ufs/quota.h>
63#include <ufs/ufs/ufsmount.h>
64#include <ufs/ufs/inode.h>
65#include <ufs/ufs/ufs_extern.h>
66
67
68#include <gnu/ext2fs/fs.h>
69#include <gnu/ext2fs/ext2_extern.h>
70#include <gnu/ext2fs/ext2_fs.h>
71#include <gnu/ext2fs/ext2_fs_sb.h>
72
73static int ext2_fhtovp __P((struct mount *, struct fid *, struct vnode **));
74static int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p));
75static int ext2_mount __P((struct mount *,
76 char *, caddr_t, struct nameidata *, struct proc *));
77static int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *));
78static int ext2_reload __P((struct mount *mountp, struct ucred *cred,
79 struct proc *p));
80static int ext2_sbupdate __P((struct ufsmount *, int));
81static int ext2_statfs __P((struct mount *, struct statfs *, struct proc *));
82static int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *));
83static int ext2_unmount __P((struct mount *, int, struct proc *));
84static int ext2_vget __P((struct mount *, ino_t, struct vnode **));
85static int ext2_vptofh __P((struct vnode *, struct fid *));
86
87static MALLOC_DEFINE(M_EXT2NODE, "EXT2 node", "EXT2 vnode private part");
88
89static struct vfsops ext2fs_vfsops = {
90 ext2_mount,
91 ufs_start, /* empty function */
92 ext2_unmount,
93 ufs_root, /* root inode via vget */
94 ufs_quotactl, /* does operations associated with quotas */
95 ext2_statfs,
96 ext2_sync,
97 ext2_vget,
98 ext2_fhtovp,
99 ufs_check_export,
100 ext2_vptofh,
101 ext2_init,
102 vfs_stduninit,
103 vfs_stdextattrctl,
104};
105
106VFS_SET(ext2fs_vfsops, ext2fs, 0);
107#define bsd_malloc malloc
108#define bsd_free free
109
110static int ext2fs_inode_hash_lock;
111
112static int ext2_check_sb_compat __P((struct ext2_super_block *es,
113 dev_t dev, int ronly));
114static int compute_sb_data __P((struct vnode * devvp,
115 struct ext2_super_block * es,
116 struct ext2_sb_info * fs));
117
118#ifdef notyet
119static int ext2_mountroot __P((void));
120
121/*
122 * Called by main() when ext2fs is going to be mounted as root.
123 *
124 * Name is updated by mount(8) after booting.
125 */
126#define ROOTNAME "root_device"
127
128static int
129ext2_mountroot()
130{
131 register struct ext2_sb_info *fs;
132 register struct mount *mp;
133 struct proc *p = curproc;
134 struct ufsmount *ump;
135 u_int size;
136 int error;
137
138 if ((error = bdevvp(rootdev, &rootvp))) {
139 printf("ext2_mountroot: can't find rootvp\n");
140 return (error);
141 }
142 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
143 bzero((char *)mp, (u_long)sizeof(struct mount));
144 mp->mnt_op = &ext2fs_vfsops;
145 mp->mnt_flag = MNT_RDONLY;
146 if (error = ext2_mountfs(rootvp, mp, p)) {
147 bsd_free(mp, M_MOUNT);
148 return (error);
149 }
150 if (error = vfs_lock(mp)) {
151 (void)ext2_unmount(mp, 0, p);
152 bsd_free(mp, M_MOUNT);
153 return (error);
154 }
155 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
156 mp->mnt_flag |= MNT_ROOTFS;
157 mp->mnt_vnodecovered = NULLVP;
158 ump = VFSTOUFS(mp);
159 fs = ump->um_e2fs;
160 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
161 fs->fs_fsmnt[0] = '/';
162 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
163 MNAMELEN);
164 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
165 &size);
166 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
167 (void)ext2_statfs(mp, &mp->mnt_stat, p);
168 vfs_unlock(mp);
169 inittodr(fs->s_es->s_wtime); /* this helps to set the time */
170 return (0);
171}
172#endif
173
174/*
175 * VFS Operations.
176 *
177 * mount system call
178 */
179static int
180ext2_mount(mp, path, data, ndp, p)
181 register struct mount *mp;
182 char *path;
183 caddr_t data; /* this is actually a (struct ufs_args *) */
184 struct nameidata *ndp;
185 struct proc *p;
186{
187 struct vnode *devvp;
188 struct ufs_args args;
189 struct ufsmount *ump = 0;
190 register struct ext2_sb_info *fs;
191 size_t size;
192 int error, flags;
193 mode_t accessmode;
194
195 if ((error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) != 0)
196 return (error);
197 /*
198 * If updating, check whether changing from read-only to
199 * read/write; if there is no device name, that's all we do.
200 */
201 if (mp->mnt_flag & MNT_UPDATE) {
202 ump = VFSTOUFS(mp);
203 fs = ump->um_e2fs;
204 error = 0;
205 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
206 flags = WRITECLOSE;
207 if (mp->mnt_flag & MNT_FORCE)
208 flags |= FORCECLOSE;
209 if (vfs_busy(mp, LK_NOWAIT, 0, p))
210 return (EBUSY);
211 error = ext2_flushfiles(mp, flags, p);
212 vfs_unbusy(mp, p);
213 if (!error && fs->s_wasvalid) {
214 fs->s_es->s_state |= EXT2_VALID_FS;
215 ext2_sbupdate(ump, MNT_WAIT);
216 }
217 fs->s_rd_only = 1;
218 }
219 if (!error && (mp->mnt_flag & MNT_RELOAD))
220 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p);
221 if (error)
222 return (error);
223 devvp = ump->um_devvp;
224 if (ext2_check_sb_compat(fs->s_es, devvp->v_rdev,
225 (mp->mnt_kern_flag & MNTK_WANTRDWR) == 0) != 0)
226 return (EPERM);
227 if (fs->s_rd_only && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
228 /*
229 * If upgrade to read-write by non-root, then verify
230 * that user has necessary permissions on the device.
231 */
232 if (suser(p)) {
233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
234 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
235 p->p_ucred, p)) != 0) {
236 VOP_UNLOCK(devvp, 0, p);
237 return (error);
238 }
239 VOP_UNLOCK(devvp, 0, p);
240 }
241
242 if ((fs->s_es->s_state & EXT2_VALID_FS) == 0 ||
243 (fs->s_es->s_state & EXT2_ERROR_FS)) {
244 if (mp->mnt_flag & MNT_FORCE) {
245 printf(
246"WARNING: %s was not properly dismounted\n",
247 fs->fs_fsmnt);
248 } else {
249 printf(
250"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
251 fs->fs_fsmnt);
252 return (EPERM);
253 }
254 }
255 fs->s_es->s_state &= ~EXT2_VALID_FS;
256 ext2_sbupdate(ump, MNT_WAIT);
257 fs->s_rd_only = 0;
258 }
259 if (args.fspec == 0) {
260 /*
261 * Process export requests.
262 */
263 return (vfs_export(mp, &ump->um_export, &args.export));
264 }
265 }
266 /*
267 * Not an update, or updating the name: look up the name
268 * and verify that it refers to a sensible block device.
269 */
270 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
271 if ((error = namei(ndp)) != 0)
272 return (error);
273 NDFREE(ndp, NDF_ONLY_PNBUF);
274 devvp = ndp->ni_vp;
275
276 if (!vn_isdisk(devvp, &error)) {
277 vrele(devvp);
278 return (error);
279 }
280
281 /*
282 * If mount by non-root, then verify that user has necessary
283 * permissions on the device.
284 */
285 if (suser(p)) {
286 accessmode = VREAD;
287 if ((mp->mnt_flag & MNT_RDONLY) == 0)
288 accessmode |= VWRITE;
289 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
290 if ((error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) != 0) {
291 vput(devvp);
292 return (error);
293 }
294 VOP_UNLOCK(devvp, 0, p);
295 }
296
297 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
298 error = ext2_mountfs(devvp, mp, p);
299 } else {
300 if (devvp != ump->um_devvp)
301 error = EINVAL; /* needs translation */
302 else
303 vrele(devvp);
304 }
305 if (error) {
306 vrele(devvp);
307 return (error);
308 }
309 ump = VFSTOUFS(mp);
310 fs = ump->um_e2fs;
311 (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
312 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
313 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
314 MNAMELEN);
315 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
316 &size);
317 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
318 (void)ext2_statfs(mp, &mp->mnt_stat, p);
319 return (0);
320}
321
322/*
323 * checks that the data in the descriptor blocks make sense
324 * this is taken from ext2/super.c
325 */
326static int ext2_check_descriptors (struct ext2_sb_info * sb)
327{
328 int i;
329 int desc_block = 0;
330 unsigned long block = sb->s_es->s_first_data_block;
331 struct ext2_group_desc * gdp = NULL;
332
333 /* ext2_debug ("Checking group descriptors"); */
334
335 for (i = 0; i < sb->s_groups_count; i++)
336 {
337 /* examine next descriptor block */
338 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
339 gdp = (struct ext2_group_desc *)
340 sb->s_group_desc[desc_block++]->b_data;
341 if (gdp->bg_block_bitmap < block ||
342 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
343 {
344 printf ("ext2_check_descriptors: "
345 "Block bitmap for group %d"
346 " not in group (block %lu)!\n",
347 i, (unsigned long) gdp->bg_block_bitmap);
348 return 0;
349 }
350 if (gdp->bg_inode_bitmap < block ||
351 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
352 {
353 printf ("ext2_check_descriptors: "
354 "Inode bitmap for group %d"
355 " not in group (block %lu)!\n",
356 i, (unsigned long) gdp->bg_inode_bitmap);
357 return 0;
358 }
359 if (gdp->bg_inode_table < block ||
360 gdp->bg_inode_table + sb->s_itb_per_group >=
361 block + EXT2_BLOCKS_PER_GROUP(sb))
362 {
363 printf ("ext2_check_descriptors: "
364 "Inode table for group %d"
365 " not in group (block %lu)!\n",
366 i, (unsigned long) gdp->bg_inode_table);
367 return 0;
368 }
369 block += EXT2_BLOCKS_PER_GROUP(sb);
370 gdp++;
371 }
372 return 1;
373}
374
375static int
376ext2_check_sb_compat(es, dev, ronly)
377 struct ext2_super_block *es;
378 dev_t dev;
379 int ronly;
380{
381
382 if (es->s_magic != EXT2_SUPER_MAGIC) {
383 printf("ext2fs: %s: wrong magic number %#x (expected %#x)\n",
384 devtoname(dev), es->s_magic, EXT2_SUPER_MAGIC);
385 return (1);
386 }
387 if (es->s_rev_level > EXT2_GOOD_OLD_REV) {
388 if (es->s_feature_incompat & ~EXT2_FEATURE_INCOMPAT_SUPP) {
389 printf(
390"WARNING: mount of %s denied due to unsupported optional features\n",
391 devtoname(dev));
392 return (1);
393 }
394 if (!ronly &&
395 (es->s_feature_ro_compat & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
396 printf(
397"WARNING: R/W mount of %s denied due to unsupported optional features\n",
398 devtoname(dev));
399 return (1);
400 }
401 }
402 return (0);
403}
404
405/*
406 * this computes the fields of the ext2_sb_info structure from the
407 * data in the ext2_super_block structure read in
408 */
409static int compute_sb_data(devvp, es, fs)
410 struct vnode * devvp;
411 struct ext2_super_block * es;
412 struct ext2_sb_info * fs;
413{
414 int db_count, error;
415 int i, j;
416 int logic_sb_block = 1; /* XXX for now */
417
418#if 1
419#define V(v)
420#else
421#define V(v) printf(#v"= %d\n", fs->v);
422#endif
423
424 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
425 V(s_blocksize)
426 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
427 V(s_bshift)
428 fs->s_fsbtodb = es->s_log_block_size + 1;
429 V(s_fsbtodb)
430 fs->s_qbmask = fs->s_blocksize - 1;
431 V(s_bmask)
432 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
433 V(s_blocksize_bits)
434 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
435 V(s_frag_size)
436 if (fs->s_frag_size)
437 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
438 V(s_frags_per_block)
439 fs->s_blocks_per_group = es->s_blocks_per_group;
440 V(s_blocks_per_group)
441 fs->s_frags_per_group = es->s_frags_per_group;
442 V(s_frags_per_group)
443 fs->s_inodes_per_group = es->s_inodes_per_group;
444 V(s_inodes_per_group)
445 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
446 V(s_inodes_per_block)
447 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
448 V(s_itb_per_group)
449 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
450 V(s_desc_per_block)
451 /* s_resuid / s_resgid ? */
452 fs->s_groups_count = (es->s_blocks_count -
453 es->s_first_data_block +
454 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
455 EXT2_BLOCKS_PER_GROUP(fs);
456 V(s_groups_count)
457 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
458 EXT2_DESC_PER_BLOCK(fs);
459 fs->s_db_per_group = db_count;
460 V(s_db_per_group)
461
462 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
463 M_UFSMNT, M_WAITOK);
464
465 /* adjust logic_sb_block */
466 if(fs->s_blocksize > SBSIZE)
467 /* Godmar thinks: if the blocksize is greater than 1024, then
468 the superblock is logically part of block zero.
469 */
470 logic_sb_block = 0;
471
472 for (i = 0; i < db_count; i++) {
473 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1),
474 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]);
475 if(error) {
476 for (j = 0; j < i; j++)
477 brelse(fs->s_group_desc[j]);
478 bsd_free(fs->s_group_desc, M_UFSMNT);
479 printf("EXT2-fs: unable to read group descriptors (%d)\n", error);
480 return EIO;
481 }
482 /* Set the B_LOCKED flag on the buffer, then brelse() it */
483 LCK_BUF(fs->s_group_desc[i])
484 }
485 if(!ext2_check_descriptors(fs)) {
486 for (j = 0; j < db_count; j++)
487 ULCK_BUF(fs->s_group_desc[j])
488 bsd_free(fs->s_group_desc, M_UFSMNT);
489 printf("EXT2-fs: (ext2_check_descriptors failure) "
490 "unable to read group descriptors\n");
491 return EIO;
492 }
493
494 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
495 fs->s_inode_bitmap_number[i] = 0;
496 fs->s_inode_bitmap[i] = NULL;
497 fs->s_block_bitmap_number[i] = 0;
498 fs->s_block_bitmap[i] = NULL;
499 }
500 fs->s_loaded_inode_bitmaps = 0;
501 fs->s_loaded_block_bitmaps = 0;
502 return 0;
503}
504
505/*
506 * Reload all incore data for a filesystem (used after running fsck on
507 * the root filesystem and finding things to fix). The filesystem must
508 * be mounted read-only.
509 *
510 * Things to do to update the mount:
511 * 1) invalidate all cached meta-data.
512 * 2) re-read superblock from disk.
513 * 3) re-read summary information from disk.
514 * 4) invalidate all inactive vnodes.
515 * 5) invalidate all cached file data.
516 * 6) re-read inode data for all active vnodes.
517 */
518static int
519ext2_reload(mountp, cred, p)
520 register struct mount *mountp;
521 struct ucred *cred;
522 struct proc *p;
523{
524 register struct vnode *vp, *nvp, *devvp;
525 struct inode *ip;
526 struct buf *bp;
527 struct ext2_super_block * es;
528 struct ext2_sb_info *fs;
529 int error;
530
531 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
532 return (EINVAL);
533 /*
534 * Step 1: invalidate all cached meta-data.
535 */
536 devvp = VFSTOUFS(mountp)->um_devvp;
537 if (vinvalbuf(devvp, 0, cred, p, 0, 0))
538 panic("ext2_reload: dirty1");
539 /*
540 * Step 2: re-read superblock from disk.
541 * constants have been adjusted for ext2
542 */
543 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
544 return (error);
545 es = (struct ext2_super_block *)bp->b_data;
546 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) {
547 brelse(bp);
548 return (EIO); /* XXX needs translation */
549 }
550 fs = VFSTOUFS(mountp)->um_e2fs;
551 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
552
553 if((error = compute_sb_data(devvp, es, fs)) != 0) {
554 brelse(bp);
555 return error;
556 }
557#ifdef UNKLAR
558 if (fs->fs_sbsize < SBSIZE)
559 bp->b_flags |= B_INVAL;
560#endif
561 brelse(bp);
562
563loop:
| 41 */
42
43#include "opt_quota.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/namei.h>
48#include <sys/proc.h>
49#include <sys/kernel.h>
50#include <sys/vnode.h>
51#include <sys/mount.h>
52#include <sys/bio.h>
53#include <sys/buf.h>
54#include <sys/conf.h>
55#include <sys/fcntl.h>
56#include <sys/disklabel.h>
57#include <sys/malloc.h>
58#include <sys/stat.h>
59#include <sys/mutex.h>
60
61#include <ufs/ufs/extattr.h>
62#include <ufs/ufs/quota.h>
63#include <ufs/ufs/ufsmount.h>
64#include <ufs/ufs/inode.h>
65#include <ufs/ufs/ufs_extern.h>
66
67
68#include <gnu/ext2fs/fs.h>
69#include <gnu/ext2fs/ext2_extern.h>
70#include <gnu/ext2fs/ext2_fs.h>
71#include <gnu/ext2fs/ext2_fs_sb.h>
72
73static int ext2_fhtovp __P((struct mount *, struct fid *, struct vnode **));
74static int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p));
75static int ext2_mount __P((struct mount *,
76 char *, caddr_t, struct nameidata *, struct proc *));
77static int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *));
78static int ext2_reload __P((struct mount *mountp, struct ucred *cred,
79 struct proc *p));
80static int ext2_sbupdate __P((struct ufsmount *, int));
81static int ext2_statfs __P((struct mount *, struct statfs *, struct proc *));
82static int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *));
83static int ext2_unmount __P((struct mount *, int, struct proc *));
84static int ext2_vget __P((struct mount *, ino_t, struct vnode **));
85static int ext2_vptofh __P((struct vnode *, struct fid *));
86
87static MALLOC_DEFINE(M_EXT2NODE, "EXT2 node", "EXT2 vnode private part");
88
89static struct vfsops ext2fs_vfsops = {
90 ext2_mount,
91 ufs_start, /* empty function */
92 ext2_unmount,
93 ufs_root, /* root inode via vget */
94 ufs_quotactl, /* does operations associated with quotas */
95 ext2_statfs,
96 ext2_sync,
97 ext2_vget,
98 ext2_fhtovp,
99 ufs_check_export,
100 ext2_vptofh,
101 ext2_init,
102 vfs_stduninit,
103 vfs_stdextattrctl,
104};
105
106VFS_SET(ext2fs_vfsops, ext2fs, 0);
107#define bsd_malloc malloc
108#define bsd_free free
109
110static int ext2fs_inode_hash_lock;
111
112static int ext2_check_sb_compat __P((struct ext2_super_block *es,
113 dev_t dev, int ronly));
114static int compute_sb_data __P((struct vnode * devvp,
115 struct ext2_super_block * es,
116 struct ext2_sb_info * fs));
117
118#ifdef notyet
119static int ext2_mountroot __P((void));
120
121/*
122 * Called by main() when ext2fs is going to be mounted as root.
123 *
124 * Name is updated by mount(8) after booting.
125 */
126#define ROOTNAME "root_device"
127
128static int
129ext2_mountroot()
130{
131 register struct ext2_sb_info *fs;
132 register struct mount *mp;
133 struct proc *p = curproc;
134 struct ufsmount *ump;
135 u_int size;
136 int error;
137
138 if ((error = bdevvp(rootdev, &rootvp))) {
139 printf("ext2_mountroot: can't find rootvp\n");
140 return (error);
141 }
142 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
143 bzero((char *)mp, (u_long)sizeof(struct mount));
144 mp->mnt_op = &ext2fs_vfsops;
145 mp->mnt_flag = MNT_RDONLY;
146 if (error = ext2_mountfs(rootvp, mp, p)) {
147 bsd_free(mp, M_MOUNT);
148 return (error);
149 }
150 if (error = vfs_lock(mp)) {
151 (void)ext2_unmount(mp, 0, p);
152 bsd_free(mp, M_MOUNT);
153 return (error);
154 }
155 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
156 mp->mnt_flag |= MNT_ROOTFS;
157 mp->mnt_vnodecovered = NULLVP;
158 ump = VFSTOUFS(mp);
159 fs = ump->um_e2fs;
160 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
161 fs->fs_fsmnt[0] = '/';
162 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
163 MNAMELEN);
164 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
165 &size);
166 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
167 (void)ext2_statfs(mp, &mp->mnt_stat, p);
168 vfs_unlock(mp);
169 inittodr(fs->s_es->s_wtime); /* this helps to set the time */
170 return (0);
171}
172#endif
173
174/*
175 * VFS Operations.
176 *
177 * mount system call
178 */
179static int
180ext2_mount(mp, path, data, ndp, p)
181 register struct mount *mp;
182 char *path;
183 caddr_t data; /* this is actually a (struct ufs_args *) */
184 struct nameidata *ndp;
185 struct proc *p;
186{
187 struct vnode *devvp;
188 struct ufs_args args;
189 struct ufsmount *ump = 0;
190 register struct ext2_sb_info *fs;
191 size_t size;
192 int error, flags;
193 mode_t accessmode;
194
195 if ((error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) != 0)
196 return (error);
197 /*
198 * If updating, check whether changing from read-only to
199 * read/write; if there is no device name, that's all we do.
200 */
201 if (mp->mnt_flag & MNT_UPDATE) {
202 ump = VFSTOUFS(mp);
203 fs = ump->um_e2fs;
204 error = 0;
205 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
206 flags = WRITECLOSE;
207 if (mp->mnt_flag & MNT_FORCE)
208 flags |= FORCECLOSE;
209 if (vfs_busy(mp, LK_NOWAIT, 0, p))
210 return (EBUSY);
211 error = ext2_flushfiles(mp, flags, p);
212 vfs_unbusy(mp, p);
213 if (!error && fs->s_wasvalid) {
214 fs->s_es->s_state |= EXT2_VALID_FS;
215 ext2_sbupdate(ump, MNT_WAIT);
216 }
217 fs->s_rd_only = 1;
218 }
219 if (!error && (mp->mnt_flag & MNT_RELOAD))
220 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p);
221 if (error)
222 return (error);
223 devvp = ump->um_devvp;
224 if (ext2_check_sb_compat(fs->s_es, devvp->v_rdev,
225 (mp->mnt_kern_flag & MNTK_WANTRDWR) == 0) != 0)
226 return (EPERM);
227 if (fs->s_rd_only && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
228 /*
229 * If upgrade to read-write by non-root, then verify
230 * that user has necessary permissions on the device.
231 */
232 if (suser(p)) {
233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
234 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
235 p->p_ucred, p)) != 0) {
236 VOP_UNLOCK(devvp, 0, p);
237 return (error);
238 }
239 VOP_UNLOCK(devvp, 0, p);
240 }
241
242 if ((fs->s_es->s_state & EXT2_VALID_FS) == 0 ||
243 (fs->s_es->s_state & EXT2_ERROR_FS)) {
244 if (mp->mnt_flag & MNT_FORCE) {
245 printf(
246"WARNING: %s was not properly dismounted\n",
247 fs->fs_fsmnt);
248 } else {
249 printf(
250"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
251 fs->fs_fsmnt);
252 return (EPERM);
253 }
254 }
255 fs->s_es->s_state &= ~EXT2_VALID_FS;
256 ext2_sbupdate(ump, MNT_WAIT);
257 fs->s_rd_only = 0;
258 }
259 if (args.fspec == 0) {
260 /*
261 * Process export requests.
262 */
263 return (vfs_export(mp, &ump->um_export, &args.export));
264 }
265 }
266 /*
267 * Not an update, or updating the name: look up the name
268 * and verify that it refers to a sensible block device.
269 */
270 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
271 if ((error = namei(ndp)) != 0)
272 return (error);
273 NDFREE(ndp, NDF_ONLY_PNBUF);
274 devvp = ndp->ni_vp;
275
276 if (!vn_isdisk(devvp, &error)) {
277 vrele(devvp);
278 return (error);
279 }
280
281 /*
282 * If mount by non-root, then verify that user has necessary
283 * permissions on the device.
284 */
285 if (suser(p)) {
286 accessmode = VREAD;
287 if ((mp->mnt_flag & MNT_RDONLY) == 0)
288 accessmode |= VWRITE;
289 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
290 if ((error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) != 0) {
291 vput(devvp);
292 return (error);
293 }
294 VOP_UNLOCK(devvp, 0, p);
295 }
296
297 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
298 error = ext2_mountfs(devvp, mp, p);
299 } else {
300 if (devvp != ump->um_devvp)
301 error = EINVAL; /* needs translation */
302 else
303 vrele(devvp);
304 }
305 if (error) {
306 vrele(devvp);
307 return (error);
308 }
309 ump = VFSTOUFS(mp);
310 fs = ump->um_e2fs;
311 (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
312 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
313 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
314 MNAMELEN);
315 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
316 &size);
317 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
318 (void)ext2_statfs(mp, &mp->mnt_stat, p);
319 return (0);
320}
321
322/*
323 * checks that the data in the descriptor blocks make sense
324 * this is taken from ext2/super.c
325 */
326static int ext2_check_descriptors (struct ext2_sb_info * sb)
327{
328 int i;
329 int desc_block = 0;
330 unsigned long block = sb->s_es->s_first_data_block;
331 struct ext2_group_desc * gdp = NULL;
332
333 /* ext2_debug ("Checking group descriptors"); */
334
335 for (i = 0; i < sb->s_groups_count; i++)
336 {
337 /* examine next descriptor block */
338 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
339 gdp = (struct ext2_group_desc *)
340 sb->s_group_desc[desc_block++]->b_data;
341 if (gdp->bg_block_bitmap < block ||
342 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
343 {
344 printf ("ext2_check_descriptors: "
345 "Block bitmap for group %d"
346 " not in group (block %lu)!\n",
347 i, (unsigned long) gdp->bg_block_bitmap);
348 return 0;
349 }
350 if (gdp->bg_inode_bitmap < block ||
351 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
352 {
353 printf ("ext2_check_descriptors: "
354 "Inode bitmap for group %d"
355 " not in group (block %lu)!\n",
356 i, (unsigned long) gdp->bg_inode_bitmap);
357 return 0;
358 }
359 if (gdp->bg_inode_table < block ||
360 gdp->bg_inode_table + sb->s_itb_per_group >=
361 block + EXT2_BLOCKS_PER_GROUP(sb))
362 {
363 printf ("ext2_check_descriptors: "
364 "Inode table for group %d"
365 " not in group (block %lu)!\n",
366 i, (unsigned long) gdp->bg_inode_table);
367 return 0;
368 }
369 block += EXT2_BLOCKS_PER_GROUP(sb);
370 gdp++;
371 }
372 return 1;
373}
374
375static int
376ext2_check_sb_compat(es, dev, ronly)
377 struct ext2_super_block *es;
378 dev_t dev;
379 int ronly;
380{
381
382 if (es->s_magic != EXT2_SUPER_MAGIC) {
383 printf("ext2fs: %s: wrong magic number %#x (expected %#x)\n",
384 devtoname(dev), es->s_magic, EXT2_SUPER_MAGIC);
385 return (1);
386 }
387 if (es->s_rev_level > EXT2_GOOD_OLD_REV) {
388 if (es->s_feature_incompat & ~EXT2_FEATURE_INCOMPAT_SUPP) {
389 printf(
390"WARNING: mount of %s denied due to unsupported optional features\n",
391 devtoname(dev));
392 return (1);
393 }
394 if (!ronly &&
395 (es->s_feature_ro_compat & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
396 printf(
397"WARNING: R/W mount of %s denied due to unsupported optional features\n",
398 devtoname(dev));
399 return (1);
400 }
401 }
402 return (0);
403}
404
405/*
406 * this computes the fields of the ext2_sb_info structure from the
407 * data in the ext2_super_block structure read in
408 */
409static int compute_sb_data(devvp, es, fs)
410 struct vnode * devvp;
411 struct ext2_super_block * es;
412 struct ext2_sb_info * fs;
413{
414 int db_count, error;
415 int i, j;
416 int logic_sb_block = 1; /* XXX for now */
417
418#if 1
419#define V(v)
420#else
421#define V(v) printf(#v"= %d\n", fs->v);
422#endif
423
424 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
425 V(s_blocksize)
426 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
427 V(s_bshift)
428 fs->s_fsbtodb = es->s_log_block_size + 1;
429 V(s_fsbtodb)
430 fs->s_qbmask = fs->s_blocksize - 1;
431 V(s_bmask)
432 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
433 V(s_blocksize_bits)
434 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
435 V(s_frag_size)
436 if (fs->s_frag_size)
437 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
438 V(s_frags_per_block)
439 fs->s_blocks_per_group = es->s_blocks_per_group;
440 V(s_blocks_per_group)
441 fs->s_frags_per_group = es->s_frags_per_group;
442 V(s_frags_per_group)
443 fs->s_inodes_per_group = es->s_inodes_per_group;
444 V(s_inodes_per_group)
445 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
446 V(s_inodes_per_block)
447 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
448 V(s_itb_per_group)
449 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
450 V(s_desc_per_block)
451 /* s_resuid / s_resgid ? */
452 fs->s_groups_count = (es->s_blocks_count -
453 es->s_first_data_block +
454 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
455 EXT2_BLOCKS_PER_GROUP(fs);
456 V(s_groups_count)
457 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
458 EXT2_DESC_PER_BLOCK(fs);
459 fs->s_db_per_group = db_count;
460 V(s_db_per_group)
461
462 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
463 M_UFSMNT, M_WAITOK);
464
465 /* adjust logic_sb_block */
466 if(fs->s_blocksize > SBSIZE)
467 /* Godmar thinks: if the blocksize is greater than 1024, then
468 the superblock is logically part of block zero.
469 */
470 logic_sb_block = 0;
471
472 for (i = 0; i < db_count; i++) {
473 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1),
474 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]);
475 if(error) {
476 for (j = 0; j < i; j++)
477 brelse(fs->s_group_desc[j]);
478 bsd_free(fs->s_group_desc, M_UFSMNT);
479 printf("EXT2-fs: unable to read group descriptors (%d)\n", error);
480 return EIO;
481 }
482 /* Set the B_LOCKED flag on the buffer, then brelse() it */
483 LCK_BUF(fs->s_group_desc[i])
484 }
485 if(!ext2_check_descriptors(fs)) {
486 for (j = 0; j < db_count; j++)
487 ULCK_BUF(fs->s_group_desc[j])
488 bsd_free(fs->s_group_desc, M_UFSMNT);
489 printf("EXT2-fs: (ext2_check_descriptors failure) "
490 "unable to read group descriptors\n");
491 return EIO;
492 }
493
494 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
495 fs->s_inode_bitmap_number[i] = 0;
496 fs->s_inode_bitmap[i] = NULL;
497 fs->s_block_bitmap_number[i] = 0;
498 fs->s_block_bitmap[i] = NULL;
499 }
500 fs->s_loaded_inode_bitmaps = 0;
501 fs->s_loaded_block_bitmaps = 0;
502 return 0;
503}
504
505/*
506 * Reload all incore data for a filesystem (used after running fsck on
507 * the root filesystem and finding things to fix). The filesystem must
508 * be mounted read-only.
509 *
510 * Things to do to update the mount:
511 * 1) invalidate all cached meta-data.
512 * 2) re-read superblock from disk.
513 * 3) re-read summary information from disk.
514 * 4) invalidate all inactive vnodes.
515 * 5) invalidate all cached file data.
516 * 6) re-read inode data for all active vnodes.
517 */
518static int
519ext2_reload(mountp, cred, p)
520 register struct mount *mountp;
521 struct ucred *cred;
522 struct proc *p;
523{
524 register struct vnode *vp, *nvp, *devvp;
525 struct inode *ip;
526 struct buf *bp;
527 struct ext2_super_block * es;
528 struct ext2_sb_info *fs;
529 int error;
530
531 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
532 return (EINVAL);
533 /*
534 * Step 1: invalidate all cached meta-data.
535 */
536 devvp = VFSTOUFS(mountp)->um_devvp;
537 if (vinvalbuf(devvp, 0, cred, p, 0, 0))
538 panic("ext2_reload: dirty1");
539 /*
540 * Step 2: re-read superblock from disk.
541 * constants have been adjusted for ext2
542 */
543 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
544 return (error);
545 es = (struct ext2_super_block *)bp->b_data;
546 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) {
547 brelse(bp);
548 return (EIO); /* XXX needs translation */
549 }
550 fs = VFSTOUFS(mountp)->um_e2fs;
551 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
552
553 if((error = compute_sb_data(devvp, es, fs)) != 0) {
554 brelse(bp);
555 return error;
556 }
557#ifdef UNKLAR
558 if (fs->fs_sbsize < SBSIZE)
559 bp->b_flags |= B_INVAL;
560#endif
561 brelse(bp);
562
563loop:
|
564 mtx_enter(&mntvnode_mtx, MTX_DEF);
| 564 mtx_lock(&mntvnode_mtx);
|
565 for (vp = LIST_FIRST(&mountp->mnt_vnodelist); vp != NULL; vp = nvp) {
566 if (vp->v_mount != mountp) {
| 565 for (vp = LIST_FIRST(&mountp->mnt_vnodelist); vp != NULL; vp = nvp) {
566 if (vp->v_mount != mountp) {
|
567 mtx_exit(&mntvnode_mtx, MTX_DEF);
| 567 mtx_unlock(&mntvnode_mtx);
|
568 goto loop;
569 }
570 nvp = LIST_NEXT(vp, v_mntvnodes);
571 /*
572 * Step 4: invalidate all inactive vnodes.
573 */
574 if (vrecycle(vp, &mntvnode_mtx, p))
575 goto loop;
576 /*
577 * Step 5: invalidate all cached file data.
578 */
| 568 goto loop;
569 }
570 nvp = LIST_NEXT(vp, v_mntvnodes);
571 /*
572 * Step 4: invalidate all inactive vnodes.
573 */
574 if (vrecycle(vp, &mntvnode_mtx, p))
575 goto loop;
576 /*
577 * Step 5: invalidate all cached file data.
578 */
|
579 mtx_enter(&vp->v_interlock, MTX_DEF);
580 mtx_exit(&mntvnode_mtx, MTX_DEF);
| 579 mtx_lock(&vp->v_interlock);
580 mtx_unlock(&mntvnode_mtx);
|
581 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p)) {
582 goto loop;
583 }
584 if (vinvalbuf(vp, 0, cred, p, 0, 0))
585 panic("ext2_reload: dirty2");
586 /*
587 * Step 6: re-read inode data for all active vnodes.
588 */
589 ip = VTOI(vp);
590 error =
591 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
592 (int)fs->s_blocksize, NOCRED, &bp);
593 if (error) {
594 vput(vp);
595 return (error);
596 }
597 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
598 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)),
599 &ip->i_din);
600 brelse(bp);
601 vput(vp);
| 581 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p)) {
582 goto loop;
583 }
584 if (vinvalbuf(vp, 0, cred, p, 0, 0))
585 panic("ext2_reload: dirty2");
586 /*
587 * Step 6: re-read inode data for all active vnodes.
588 */
589 ip = VTOI(vp);
590 error =
591 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
592 (int)fs->s_blocksize, NOCRED, &bp);
593 if (error) {
594 vput(vp);
595 return (error);
596 }
597 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
598 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)),
599 &ip->i_din);
600 brelse(bp);
601 vput(vp);
|
602 mtx_enter(&mntvnode_mtx, MTX_DEF);
| 602 mtx_lock(&mntvnode_mtx);
|
603 }
| 603 }
|
604 mtx_exit(&mntvnode_mtx, MTX_DEF);
| 604 mtx_unlock(&mntvnode_mtx);
|
605 return (0);
606}
607
608/*
609 * Common code for mount and mountroot
610 */
611static int
612ext2_mountfs(devvp, mp, p)
613 register struct vnode *devvp;
614 struct mount *mp;
615 struct proc *p;
616{
617 register struct ufsmount *ump;
618 struct buf *bp;
619 register struct ext2_sb_info *fs;
620 struct ext2_super_block * es;
621 dev_t dev = devvp->v_rdev;
622 struct partinfo dpart;
623 int havepart = 0;
624 int error, i, size;
625 int ronly;
626
627 /*
628 * Disallow multiple mounts of the same device.
629 * Disallow mounting of a device that is currently in use
630 * (except for root, which might share swap device for miniroot).
631 * Flush out any old buffers remaining from a previous use.
632 */
633 if ((error = vfs_mountedon(devvp)) != 0)
634 return (error);
635 if (vcount(devvp) > 1 && devvp != rootvp)
636 return (EBUSY);
637 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
638 return (error);
639#ifdef READONLY
640/* turn on this to force it to be read-only */
641 mp->mnt_flag |= MNT_RDONLY;
642#endif
643
644 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
645 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
646 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
647 VOP_UNLOCK(devvp, 0, p);
648 if (error)
649 return (error);
650 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
651 size = DEV_BSIZE;
652 else {
653 havepart = 1;
654 size = dpart.disklab->d_secsize;
655 }
656
657 bp = NULL;
658 ump = NULL;
659 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
660 goto out;
661 es = (struct ext2_super_block *)bp->b_data;
662 if (ext2_check_sb_compat(es, dev, ronly) != 0) {
663 error = EINVAL; /* XXX needs translation */
664 goto out;
665 }
666 if ((es->s_state & EXT2_VALID_FS) == 0 ||
667 (es->s_state & EXT2_ERROR_FS)) {
668 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
669 printf(
670"WARNING: Filesystem was not properly dismounted\n");
671 } else {
672 printf(
673"WARNING: R/W mount denied. Filesystem is not clean - run fsck\n");
674 error = EPERM;
675 goto out;
676 }
677 }
678 ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
679 bzero((caddr_t)ump, sizeof *ump);
680 ump->um_malloctype = M_EXT2NODE;
681 ump->um_blkatoff = ext2_blkatoff;
682 ump->um_truncate = ext2_truncate;
683 ump->um_update = ext2_update;
684 ump->um_valloc = ext2_valloc;
685 ump->um_vfree = ext2_vfree;
686 /* I don't know whether this is the right strategy. Note that
687 we dynamically allocate both a ext2_sb_info and a ext2_super_block
688 while Linux keeps the super block in a locked buffer
689 */
690 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
691 M_UFSMNT, M_WAITOK);
692 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
693 M_UFSMNT, M_WAITOK);
694 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
695 if ((error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)))
696 goto out;
697 /*
698 * We don't free the group descriptors allocated by compute_sb_data()
699 * until ext2_unmount(). This is OK since the mount will succeed.
700 */
701 brelse(bp);
702 bp = NULL;
703 fs = ump->um_e2fs;
704 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
705 /* if the fs is not mounted read-only, make sure the super block is
706 always written back on a sync()
707 */
708 fs->s_wasvalid = fs->s_es->s_state & EXT2_VALID_FS ? 1 : 0;
709 if (ronly == 0) {
710 fs->s_dirt = 1; /* mark it modified */
711 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
712 }
713 mp->mnt_data = (qaddr_t)ump;
714 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
715 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
716 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
717 mp->mnt_flag |= MNT_LOCAL;
718 ump->um_mountp = mp;
719 ump->um_dev = dev;
720 ump->um_devvp = devvp;
721 /* setting those two parameters allows us to use
722 ufs_bmap w/o changse !
723 */
724 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
725 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
726 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
727 for (i = 0; i < MAXQUOTAS; i++)
728 ump->um_quotas[i] = NULLVP;
729 devvp->v_rdev->si_mountpoint = mp;
730 if (ronly == 0)
731 ext2_sbupdate(ump, MNT_WAIT);
732 return (0);
733out:
734 if (bp)
735 brelse(bp);
736 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
737 if (ump) {
738 bsd_free(ump->um_e2fs->s_es, M_UFSMNT);
739 bsd_free(ump->um_e2fs, M_UFSMNT);
740 bsd_free(ump, M_UFSMNT);
741 mp->mnt_data = (qaddr_t)0;
742 }
743 return (error);
744}
745
746/*
747 * unmount system call
748 */
749static int
750ext2_unmount(mp, mntflags, p)
751 struct mount *mp;
752 int mntflags;
753 struct proc *p;
754{
755 register struct ufsmount *ump;
756 register struct ext2_sb_info *fs;
757 int error, flags, ronly, i;
758
759 flags = 0;
760 if (mntflags & MNT_FORCE) {
761 if (mp->mnt_flag & MNT_ROOTFS)
762 return (EINVAL);
763 flags |= FORCECLOSE;
764 }
765 if ((error = ext2_flushfiles(mp, flags, p)) != 0)
766 return (error);
767 ump = VFSTOUFS(mp);
768 fs = ump->um_e2fs;
769 ronly = fs->s_rd_only;
770 if (ronly == 0) {
771 if (fs->s_wasvalid)
772 fs->s_es->s_state |= EXT2_VALID_FS;
773 ext2_sbupdate(ump, MNT_WAIT);
774 }
775
776 /* release buffers containing group descriptors */
777 for(i = 0; i < fs->s_db_per_group; i++)
778 ULCK_BUF(fs->s_group_desc[i])
779 bsd_free(fs->s_group_desc, M_UFSMNT);
780
781 /* release cached inode/block bitmaps */
782 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
783 if (fs->s_inode_bitmap[i])
784 ULCK_BUF(fs->s_inode_bitmap[i])
785
786 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
787 if (fs->s_block_bitmap[i])
788 ULCK_BUF(fs->s_block_bitmap[i])
789
790 ump->um_devvp->v_rdev->si_mountpoint = NULL;
791 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
792 NOCRED, p);
793 vrele(ump->um_devvp);
794 bsd_free(fs->s_es, M_UFSMNT);
795 bsd_free(fs, M_UFSMNT);
796 bsd_free(ump, M_UFSMNT);
797 mp->mnt_data = (qaddr_t)0;
798 mp->mnt_flag &= ~MNT_LOCAL;
799 return (error);
800}
801
802/*
803 * Flush out all the files in a filesystem.
804 */
805static int
806ext2_flushfiles(mp, flags, p)
807 register struct mount *mp;
808 int flags;
809 struct proc *p;
810{
811 register struct ufsmount *ump;
812 int error;
813#if QUOTA
814 int i;
815#endif
816
817 ump = VFSTOUFS(mp);
818#if QUOTA
819 if (mp->mnt_flag & MNT_QUOTA) {
820 if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0)
821 return (error);
822 for (i = 0; i < MAXQUOTAS; i++) {
823 if (ump->um_quotas[i] == NULLVP)
824 continue;
825 quotaoff(p, mp, i);
826 }
827 /*
828 * Here we fall through to vflush again to ensure
829 * that we have gotten rid of all the system vnodes.
830 */
831 }
832#endif
833 error = vflush(mp, NULLVP, flags);
834 return (error);
835}
836
837/*
838 * Get file system statistics.
839 * taken from ext2/super.c ext2_statfs
840 */
841static int
842ext2_statfs(mp, sbp, p)
843 struct mount *mp;
844 register struct statfs *sbp;
845 struct proc *p;
846{
847 unsigned long overhead;
848 register struct ufsmount *ump;
849 register struct ext2_sb_info *fs;
850 register struct ext2_super_block *es;
851 int i, nsb;
852
853 ump = VFSTOUFS(mp);
854 fs = ump->um_e2fs;
855 es = fs->s_es;
856
857 if (es->s_magic != EXT2_SUPER_MAGIC)
858 panic("ext2_statfs - magic number spoiled");
859
860 /*
861 * Compute the overhead (FS structures)
862 */
863 if (es->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
864 nsb = 0;
865 for (i = 0 ; i < fs->s_groups_count; i++)
866 if (ext2_group_sparse(i))
867 nsb++;
868 } else
869 nsb = fs->s_groups_count;
870 overhead = es->s_first_data_block +
871 /* Superblocks and block group descriptors: */
872 nsb * (1 + fs->s_db_per_group) +
873 /* Inode bitmap, block bitmap, and inode table: */
874 fs->s_groups_count * (1 + 1 + fs->s_itb_per_group);
875
876 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
877 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
878 sbp->f_blocks = es->s_blocks_count - overhead;
879 sbp->f_bfree = es->s_free_blocks_count;
880 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
881 sbp->f_files = es->s_inodes_count;
882 sbp->f_ffree = es->s_free_inodes_count;
883 if (sbp != &mp->mnt_stat) {
884 sbp->f_type = mp->mnt_vfc->vfc_typenum;
885 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
886 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
887 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
888 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
889 }
890 return (0);
891}
892
893/*
894 * Go through the disk queues to initiate sandbagged IO;
895 * go through the inodes to write those that have been modified;
896 * initiate the writing of the super block if it has been modified.
897 *
898 * Note: we are always called with the filesystem marked `MPBUSY'.
899 */
900static int
901ext2_sync(mp, waitfor, cred, p)
902 struct mount *mp;
903 int waitfor;
904 struct ucred *cred;
905 struct proc *p;
906{
907 struct vnode *nvp, *vp;
908 struct inode *ip;
909 struct ufsmount *ump = VFSTOUFS(mp);
910 struct ext2_sb_info *fs;
911 int error, allerror = 0;
912
913 fs = ump->um_e2fs;
914 if (fs->s_dirt != 0 && fs->s_rd_only != 0) { /* XXX */
915 printf("fs = %s\n", fs->fs_fsmnt);
916 panic("ext2_sync: rofs mod");
917 }
918 /*
919 * Write back each (modified) inode.
920 */
| 605 return (0);
606}
607
608/*
609 * Common code for mount and mountroot
610 */
611static int
612ext2_mountfs(devvp, mp, p)
613 register struct vnode *devvp;
614 struct mount *mp;
615 struct proc *p;
616{
617 register struct ufsmount *ump;
618 struct buf *bp;
619 register struct ext2_sb_info *fs;
620 struct ext2_super_block * es;
621 dev_t dev = devvp->v_rdev;
622 struct partinfo dpart;
623 int havepart = 0;
624 int error, i, size;
625 int ronly;
626
627 /*
628 * Disallow multiple mounts of the same device.
629 * Disallow mounting of a device that is currently in use
630 * (except for root, which might share swap device for miniroot).
631 * Flush out any old buffers remaining from a previous use.
632 */
633 if ((error = vfs_mountedon(devvp)) != 0)
634 return (error);
635 if (vcount(devvp) > 1 && devvp != rootvp)
636 return (EBUSY);
637 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
638 return (error);
639#ifdef READONLY
640/* turn on this to force it to be read-only */
641 mp->mnt_flag |= MNT_RDONLY;
642#endif
643
644 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
645 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
646 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
647 VOP_UNLOCK(devvp, 0, p);
648 if (error)
649 return (error);
650 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
651 size = DEV_BSIZE;
652 else {
653 havepart = 1;
654 size = dpart.disklab->d_secsize;
655 }
656
657 bp = NULL;
658 ump = NULL;
659 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
660 goto out;
661 es = (struct ext2_super_block *)bp->b_data;
662 if (ext2_check_sb_compat(es, dev, ronly) != 0) {
663 error = EINVAL; /* XXX needs translation */
664 goto out;
665 }
666 if ((es->s_state & EXT2_VALID_FS) == 0 ||
667 (es->s_state & EXT2_ERROR_FS)) {
668 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
669 printf(
670"WARNING: Filesystem was not properly dismounted\n");
671 } else {
672 printf(
673"WARNING: R/W mount denied. Filesystem is not clean - run fsck\n");
674 error = EPERM;
675 goto out;
676 }
677 }
678 ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
679 bzero((caddr_t)ump, sizeof *ump);
680 ump->um_malloctype = M_EXT2NODE;
681 ump->um_blkatoff = ext2_blkatoff;
682 ump->um_truncate = ext2_truncate;
683 ump->um_update = ext2_update;
684 ump->um_valloc = ext2_valloc;
685 ump->um_vfree = ext2_vfree;
686 /* I don't know whether this is the right strategy. Note that
687 we dynamically allocate both a ext2_sb_info and a ext2_super_block
688 while Linux keeps the super block in a locked buffer
689 */
690 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
691 M_UFSMNT, M_WAITOK);
692 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
693 M_UFSMNT, M_WAITOK);
694 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
695 if ((error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)))
696 goto out;
697 /*
698 * We don't free the group descriptors allocated by compute_sb_data()
699 * until ext2_unmount(). This is OK since the mount will succeed.
700 */
701 brelse(bp);
702 bp = NULL;
703 fs = ump->um_e2fs;
704 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
705 /* if the fs is not mounted read-only, make sure the super block is
706 always written back on a sync()
707 */
708 fs->s_wasvalid = fs->s_es->s_state & EXT2_VALID_FS ? 1 : 0;
709 if (ronly == 0) {
710 fs->s_dirt = 1; /* mark it modified */
711 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
712 }
713 mp->mnt_data = (qaddr_t)ump;
714 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
715 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
716 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
717 mp->mnt_flag |= MNT_LOCAL;
718 ump->um_mountp = mp;
719 ump->um_dev = dev;
720 ump->um_devvp = devvp;
721 /* setting those two parameters allows us to use
722 ufs_bmap w/o changse !
723 */
724 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
725 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
726 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
727 for (i = 0; i < MAXQUOTAS; i++)
728 ump->um_quotas[i] = NULLVP;
729 devvp->v_rdev->si_mountpoint = mp;
730 if (ronly == 0)
731 ext2_sbupdate(ump, MNT_WAIT);
732 return (0);
733out:
734 if (bp)
735 brelse(bp);
736 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
737 if (ump) {
738 bsd_free(ump->um_e2fs->s_es, M_UFSMNT);
739 bsd_free(ump->um_e2fs, M_UFSMNT);
740 bsd_free(ump, M_UFSMNT);
741 mp->mnt_data = (qaddr_t)0;
742 }
743 return (error);
744}
745
746/*
747 * unmount system call
748 */
749static int
750ext2_unmount(mp, mntflags, p)
751 struct mount *mp;
752 int mntflags;
753 struct proc *p;
754{
755 register struct ufsmount *ump;
756 register struct ext2_sb_info *fs;
757 int error, flags, ronly, i;
758
759 flags = 0;
760 if (mntflags & MNT_FORCE) {
761 if (mp->mnt_flag & MNT_ROOTFS)
762 return (EINVAL);
763 flags |= FORCECLOSE;
764 }
765 if ((error = ext2_flushfiles(mp, flags, p)) != 0)
766 return (error);
767 ump = VFSTOUFS(mp);
768 fs = ump->um_e2fs;
769 ronly = fs->s_rd_only;
770 if (ronly == 0) {
771 if (fs->s_wasvalid)
772 fs->s_es->s_state |= EXT2_VALID_FS;
773 ext2_sbupdate(ump, MNT_WAIT);
774 }
775
776 /* release buffers containing group descriptors */
777 for(i = 0; i < fs->s_db_per_group; i++)
778 ULCK_BUF(fs->s_group_desc[i])
779 bsd_free(fs->s_group_desc, M_UFSMNT);
780
781 /* release cached inode/block bitmaps */
782 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
783 if (fs->s_inode_bitmap[i])
784 ULCK_BUF(fs->s_inode_bitmap[i])
785
786 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
787 if (fs->s_block_bitmap[i])
788 ULCK_BUF(fs->s_block_bitmap[i])
789
790 ump->um_devvp->v_rdev->si_mountpoint = NULL;
791 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
792 NOCRED, p);
793 vrele(ump->um_devvp);
794 bsd_free(fs->s_es, M_UFSMNT);
795 bsd_free(fs, M_UFSMNT);
796 bsd_free(ump, M_UFSMNT);
797 mp->mnt_data = (qaddr_t)0;
798 mp->mnt_flag &= ~MNT_LOCAL;
799 return (error);
800}
801
802/*
803 * Flush out all the files in a filesystem.
804 */
805static int
806ext2_flushfiles(mp, flags, p)
807 register struct mount *mp;
808 int flags;
809 struct proc *p;
810{
811 register struct ufsmount *ump;
812 int error;
813#if QUOTA
814 int i;
815#endif
816
817 ump = VFSTOUFS(mp);
818#if QUOTA
819 if (mp->mnt_flag & MNT_QUOTA) {
820 if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0)
821 return (error);
822 for (i = 0; i < MAXQUOTAS; i++) {
823 if (ump->um_quotas[i] == NULLVP)
824 continue;
825 quotaoff(p, mp, i);
826 }
827 /*
828 * Here we fall through to vflush again to ensure
829 * that we have gotten rid of all the system vnodes.
830 */
831 }
832#endif
833 error = vflush(mp, NULLVP, flags);
834 return (error);
835}
836
837/*
838 * Get file system statistics.
839 * taken from ext2/super.c ext2_statfs
840 */
841static int
842ext2_statfs(mp, sbp, p)
843 struct mount *mp;
844 register struct statfs *sbp;
845 struct proc *p;
846{
847 unsigned long overhead;
848 register struct ufsmount *ump;
849 register struct ext2_sb_info *fs;
850 register struct ext2_super_block *es;
851 int i, nsb;
852
853 ump = VFSTOUFS(mp);
854 fs = ump->um_e2fs;
855 es = fs->s_es;
856
857 if (es->s_magic != EXT2_SUPER_MAGIC)
858 panic("ext2_statfs - magic number spoiled");
859
860 /*
861 * Compute the overhead (FS structures)
862 */
863 if (es->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
864 nsb = 0;
865 for (i = 0 ; i < fs->s_groups_count; i++)
866 if (ext2_group_sparse(i))
867 nsb++;
868 } else
869 nsb = fs->s_groups_count;
870 overhead = es->s_first_data_block +
871 /* Superblocks and block group descriptors: */
872 nsb * (1 + fs->s_db_per_group) +
873 /* Inode bitmap, block bitmap, and inode table: */
874 fs->s_groups_count * (1 + 1 + fs->s_itb_per_group);
875
876 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
877 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
878 sbp->f_blocks = es->s_blocks_count - overhead;
879 sbp->f_bfree = es->s_free_blocks_count;
880 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
881 sbp->f_files = es->s_inodes_count;
882 sbp->f_ffree = es->s_free_inodes_count;
883 if (sbp != &mp->mnt_stat) {
884 sbp->f_type = mp->mnt_vfc->vfc_typenum;
885 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
886 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
887 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
888 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
889 }
890 return (0);
891}
892
893/*
894 * Go through the disk queues to initiate sandbagged IO;
895 * go through the inodes to write those that have been modified;
896 * initiate the writing of the super block if it has been modified.
897 *
898 * Note: we are always called with the filesystem marked `MPBUSY'.
899 */
900static int
901ext2_sync(mp, waitfor, cred, p)
902 struct mount *mp;
903 int waitfor;
904 struct ucred *cred;
905 struct proc *p;
906{
907 struct vnode *nvp, *vp;
908 struct inode *ip;
909 struct ufsmount *ump = VFSTOUFS(mp);
910 struct ext2_sb_info *fs;
911 int error, allerror = 0;
912
913 fs = ump->um_e2fs;
914 if (fs->s_dirt != 0 && fs->s_rd_only != 0) { /* XXX */
915 printf("fs = %s\n", fs->fs_fsmnt);
916 panic("ext2_sync: rofs mod");
917 }
918 /*
919 * Write back each (modified) inode.
920 */
|
921 mtx_enter(&mntvnode_mtx, MTX_DEF);
| 921 mtx_lock(&mntvnode_mtx);
|
922loop:
923 for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
924 /*
925 * If the vnode that we are about to sync is no longer
926 * associated with this mount point, start over.
927 */
928 if (vp->v_mount != mp)
929 goto loop;
| 922loop:
923 for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
924 /*
925 * If the vnode that we are about to sync is no longer
926 * associated with this mount point, start over.
927 */
928 if (vp->v_mount != mp)
929 goto loop;
|
930 mtx_enter(&vp->v_interlock, MTX_DEF);
| 930 mtx_lock(&vp->v_interlock);
|
931 nvp = LIST_NEXT(vp, v_mntvnodes);
932 ip = VTOI(vp);
933 if (vp->v_type == VNON ||
934 ((ip->i_flag &
935 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
936 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY))) {
| 931 nvp = LIST_NEXT(vp, v_mntvnodes);
932 ip = VTOI(vp);
933 if (vp->v_type == VNON ||
934 ((ip->i_flag &
935 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
936 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY))) {
|
937 mtx_exit(&vp->v_interlock, MTX_DEF);
| 937 mtx_unlock(&vp->v_interlock);
|
938 continue;
939 }
| 938 continue;
939 }
|
940 mtx_exit(&mntvnode_mtx, MTX_DEF);
| 940 mtx_unlock(&mntvnode_mtx);
|
941 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
942 if (error) {
| 941 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
942 if (error) {
|
943 mtx_enter(&mntvnode_mtx, MTX_DEF);
| 943 mtx_lock(&mntvnode_mtx);
|
944 if (error == ENOENT)
945 goto loop;
946 continue;
947 }
948 if ((error = VOP_FSYNC(vp, cred, waitfor, p)) != 0)
949 allerror = error;
950 VOP_UNLOCK(vp, 0, p);
951 vrele(vp);
| 944 if (error == ENOENT)
945 goto loop;
946 continue;
947 }
948 if ((error = VOP_FSYNC(vp, cred, waitfor, p)) != 0)
949 allerror = error;
950 VOP_UNLOCK(vp, 0, p);
951 vrele(vp);
|
952 mtx_enter(&mntvnode_mtx, MTX_DEF);
| 952 mtx_lock(&mntvnode_mtx);
|
953 }
| 953 }
|
954 mtx_exit(&mntvnode_mtx, MTX_DEF);
| 954 mtx_unlock(&mntvnode_mtx);
|
955 /*
956 * Force stale file system control information to be flushed.
957 */
958 if (waitfor != MNT_LAZY) {
959 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p);
960 if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0)
961 allerror = error;
962 VOP_UNLOCK(ump->um_devvp, 0, p);
963 }
964#if QUOTA
965 qsync(mp);
966#endif
967 /*
968 * Write back modified superblock.
969 */
970 if (fs->s_dirt != 0) {
971 fs->s_dirt = 0;
972 fs->s_es->s_wtime = time_second;
973 if ((error = ext2_sbupdate(ump, waitfor)) != 0)
974 allerror = error;
975 }
976 return (allerror);
977}
978
979/*
980 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
981 * in from disk. If it is in core, wait for the lock bit to clear, then
982 * return the inode locked. Detection and handling of mount points must be
983 * done by the calling routine.
984 */
985static int
986ext2_vget(mp, ino, vpp)
987 struct mount *mp;
988 ino_t ino;
989 struct vnode **vpp;
990{
991 register struct ext2_sb_info *fs;
992 register struct inode *ip;
993 struct ufsmount *ump;
994 struct buf *bp;
995 struct vnode *vp;
996 dev_t dev;
997 int i, error;
998 int used_blocks;
999
1000 ump = VFSTOUFS(mp);
1001 dev = ump->um_dev;
1002restart:
1003 if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
1004 return (0);
1005
1006 /*
1007 * Lock out the creation of new entries in the FFS hash table in
1008 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
1009 * may occur!
1010 */
1011 if (ext2fs_inode_hash_lock) {
1012 while (ext2fs_inode_hash_lock) {
1013 ext2fs_inode_hash_lock = -1;
1014 tsleep(&ext2fs_inode_hash_lock, PVM, "e2vget", 0);
1015 }
1016 goto restart;
1017 }
1018 ext2fs_inode_hash_lock = 1;
1019
1020 /*
1021 * If this MALLOC() is performed after the getnewvnode()
1022 * it might block, leaving a vnode with a NULL v_data to be
1023 * found by ext2_sync() if a sync happens to fire right then,
1024 * which will cause a panic because ext2_sync() blindly
1025 * dereferences vp->v_data (as well it should).
1026 */
1027 MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK);
1028
1029 /* Allocate a new vnode/inode. */
1030 if ((error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) != 0) {
1031 if (ext2fs_inode_hash_lock < 0)
1032 wakeup(&ext2fs_inode_hash_lock);
1033 ext2fs_inode_hash_lock = 0;
1034 *vpp = NULL;
1035 FREE(ip, M_EXT2NODE);
1036 return (error);
1037 }
1038 bzero((caddr_t)ip, sizeof(struct inode));
1039 lockinit(&vp->v_lock, PINOD, "ext2in", 0, 0);
1040 vp->v_data = ip;
1041 ip->i_vnode = vp;
1042 ip->i_e2fs = fs = ump->um_e2fs;
1043 ip->i_dev = dev;
1044 ip->i_number = ino;
1045#if QUOTA
1046 for (i = 0; i < MAXQUOTAS; i++)
1047 ip->i_dquot[i] = NODQUOT;
1048#endif
1049 /*
1050 * Put it onto its hash chain and lock it so that other requests for
1051 * this inode will block if they arrive while we are sleeping waiting
1052 * for old data structures to be purged or for the contents of the
1053 * disk portion of this inode to be read.
1054 */
1055 ufs_ihashins(ip);
1056
1057 if (ext2fs_inode_hash_lock < 0)
1058 wakeup(&ext2fs_inode_hash_lock);
1059 ext2fs_inode_hash_lock = 0;
1060
1061 /* Read in the disk contents for the inode, copy into the inode. */
1062#if 0
1063printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
1064#endif
1065 if ((error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
1066 (int)fs->s_blocksize, NOCRED, &bp)) != 0) {
1067 /*
1068 * The inode does not contain anything useful, so it would
1069 * be misleading to leave it on its hash chain. With mode
1070 * still zero, it will be unlinked and returned to the free
1071 * list by vput().
1072 */
1073 vput(vp);
1074 brelse(bp);
1075 *vpp = NULL;
1076 return (error);
1077 }
1078 /* convert ext2 inode to dinode */
1079 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1080 ino_to_fsbo(fs, ino)), &ip->i_din);
1081 ip->i_block_group = ino_to_cg(fs, ino);
1082 ip->i_next_alloc_block = 0;
1083 ip->i_next_alloc_goal = 0;
1084 ip->i_prealloc_count = 0;
1085 ip->i_prealloc_block = 0;
1086 /* now we want to make sure that block pointers for unused
1087 blocks are zeroed out - ext2_balloc depends on this
1088 although for regular files and directories only
1089 */
1090 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1091 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1092 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1093 ip->i_db[i] = 0;
1094 }
1095/*
1096 ext2_print_inode(ip);
1097*/
1098 brelse(bp);
1099
1100 /*
1101 * Initialize the vnode from the inode, check for aliases.
1102 * Note that the underlying vnode may have changed.
1103 */
1104 if ((error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) != 0) {
1105 vput(vp);
1106 *vpp = NULL;
1107 return (error);
1108 }
1109 /*
1110 * Finish inode initialization now that aliasing has been resolved.
1111 */
1112 ip->i_devvp = ump->um_devvp;
1113 VREF(ip->i_devvp);
1114 /*
1115 * Set up a generation number for this inode if it does not
1116 * already have one. This should only happen on old filesystems.
1117 */
1118 if (ip->i_gen == 0) {
1119 ip->i_gen = random() / 2 + 1;
1120 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1121 ip->i_flag |= IN_MODIFIED;
1122 }
1123 *vpp = vp;
1124 return (0);
1125}
1126
1127/*
1128 * File handle to vnode
1129 *
1130 * Have to be really careful about stale file handles:
1131 * - check that the inode number is valid
1132 * - call ext2_vget() to get the locked inode
1133 * - check for an unallocated inode (i_mode == 0)
1134 * - check that the given client host has export rights and return
1135 * those rights via. exflagsp and credanonp
1136 */
1137static int
1138ext2_fhtovp(mp, fhp, vpp)
1139 register struct mount *mp;
1140 struct fid *fhp;
1141 struct vnode **vpp;
1142{
1143 register struct ufid *ufhp;
1144 struct ext2_sb_info *fs;
1145
1146 ufhp = (struct ufid *)fhp;
1147 fs = VFSTOUFS(mp)->um_e2fs;
1148 if (ufhp->ufid_ino < ROOTINO ||
1149 ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group)
1150 return (ESTALE);
1151 return (ufs_fhtovp(mp, ufhp, vpp));
1152}
1153
1154/*
1155 * Vnode pointer to File handle
1156 */
1157/* ARGSUSED */
1158static int
1159ext2_vptofh(vp, fhp)
1160 struct vnode *vp;
1161 struct fid *fhp;
1162{
1163 register struct inode *ip;
1164 register struct ufid *ufhp;
1165
1166 ip = VTOI(vp);
1167 ufhp = (struct ufid *)fhp;
1168 ufhp->ufid_len = sizeof(struct ufid);
1169 ufhp->ufid_ino = ip->i_number;
1170 ufhp->ufid_gen = ip->i_gen;
1171 return (0);
1172}
1173
1174/*
1175 * Write a superblock and associated information back to disk.
1176 */
1177static int
1178ext2_sbupdate(mp, waitfor)
1179 struct ufsmount *mp;
1180 int waitfor;
1181{
1182 register struct ext2_sb_info *fs = mp->um_e2fs;
1183 register struct ext2_super_block *es = fs->s_es;
1184 register struct buf *bp;
1185 int error = 0;
1186/*
1187printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
1188*/
1189 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
1190 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1191 if (waitfor == MNT_WAIT)
1192 error = bwrite(bp);
1193 else
1194 bawrite(bp);
1195
1196 /*
1197 * The buffers for group descriptors, inode bitmaps and block bitmaps
1198 * are not busy at this point and are (hopefully) written by the
1199 * usual sync mechanism. No need to write them here
1200 */
1201
1202 return (error);
1203}
| 955 /*
956 * Force stale file system control information to be flushed.
957 */
958 if (waitfor != MNT_LAZY) {
959 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p);
960 if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0)
961 allerror = error;
962 VOP_UNLOCK(ump->um_devvp, 0, p);
963 }
964#if QUOTA
965 qsync(mp);
966#endif
967 /*
968 * Write back modified superblock.
969 */
970 if (fs->s_dirt != 0) {
971 fs->s_dirt = 0;
972 fs->s_es->s_wtime = time_second;
973 if ((error = ext2_sbupdate(ump, waitfor)) != 0)
974 allerror = error;
975 }
976 return (allerror);
977}
978
979/*
980 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
981 * in from disk. If it is in core, wait for the lock bit to clear, then
982 * return the inode locked. Detection and handling of mount points must be
983 * done by the calling routine.
984 */
985static int
986ext2_vget(mp, ino, vpp)
987 struct mount *mp;
988 ino_t ino;
989 struct vnode **vpp;
990{
991 register struct ext2_sb_info *fs;
992 register struct inode *ip;
993 struct ufsmount *ump;
994 struct buf *bp;
995 struct vnode *vp;
996 dev_t dev;
997 int i, error;
998 int used_blocks;
999
1000 ump = VFSTOUFS(mp);
1001 dev = ump->um_dev;
1002restart:
1003 if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
1004 return (0);
1005
1006 /*
1007 * Lock out the creation of new entries in the FFS hash table in
1008 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
1009 * may occur!
1010 */
1011 if (ext2fs_inode_hash_lock) {
1012 while (ext2fs_inode_hash_lock) {
1013 ext2fs_inode_hash_lock = -1;
1014 tsleep(&ext2fs_inode_hash_lock, PVM, "e2vget", 0);
1015 }
1016 goto restart;
1017 }
1018 ext2fs_inode_hash_lock = 1;
1019
1020 /*
1021 * If this MALLOC() is performed after the getnewvnode()
1022 * it might block, leaving a vnode with a NULL v_data to be
1023 * found by ext2_sync() if a sync happens to fire right then,
1024 * which will cause a panic because ext2_sync() blindly
1025 * dereferences vp->v_data (as well it should).
1026 */
1027 MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK);
1028
1029 /* Allocate a new vnode/inode. */
1030 if ((error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) != 0) {
1031 if (ext2fs_inode_hash_lock < 0)
1032 wakeup(&ext2fs_inode_hash_lock);
1033 ext2fs_inode_hash_lock = 0;
1034 *vpp = NULL;
1035 FREE(ip, M_EXT2NODE);
1036 return (error);
1037 }
1038 bzero((caddr_t)ip, sizeof(struct inode));
1039 lockinit(&vp->v_lock, PINOD, "ext2in", 0, 0);
1040 vp->v_data = ip;
1041 ip->i_vnode = vp;
1042 ip->i_e2fs = fs = ump->um_e2fs;
1043 ip->i_dev = dev;
1044 ip->i_number = ino;
1045#if QUOTA
1046 for (i = 0; i < MAXQUOTAS; i++)
1047 ip->i_dquot[i] = NODQUOT;
1048#endif
1049 /*
1050 * Put it onto its hash chain and lock it so that other requests for
1051 * this inode will block if they arrive while we are sleeping waiting
1052 * for old data structures to be purged or for the contents of the
1053 * disk portion of this inode to be read.
1054 */
1055 ufs_ihashins(ip);
1056
1057 if (ext2fs_inode_hash_lock < 0)
1058 wakeup(&ext2fs_inode_hash_lock);
1059 ext2fs_inode_hash_lock = 0;
1060
1061 /* Read in the disk contents for the inode, copy into the inode. */
1062#if 0
1063printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
1064#endif
1065 if ((error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
1066 (int)fs->s_blocksize, NOCRED, &bp)) != 0) {
1067 /*
1068 * The inode does not contain anything useful, so it would
1069 * be misleading to leave it on its hash chain. With mode
1070 * still zero, it will be unlinked and returned to the free
1071 * list by vput().
1072 */
1073 vput(vp);
1074 brelse(bp);
1075 *vpp = NULL;
1076 return (error);
1077 }
1078 /* convert ext2 inode to dinode */
1079 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1080 ino_to_fsbo(fs, ino)), &ip->i_din);
1081 ip->i_block_group = ino_to_cg(fs, ino);
1082 ip->i_next_alloc_block = 0;
1083 ip->i_next_alloc_goal = 0;
1084 ip->i_prealloc_count = 0;
1085 ip->i_prealloc_block = 0;
1086 /* now we want to make sure that block pointers for unused
1087 blocks are zeroed out - ext2_balloc depends on this
1088 although for regular files and directories only
1089 */
1090 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1091 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1092 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1093 ip->i_db[i] = 0;
1094 }
1095/*
1096 ext2_print_inode(ip);
1097*/
1098 brelse(bp);
1099
1100 /*
1101 * Initialize the vnode from the inode, check for aliases.
1102 * Note that the underlying vnode may have changed.
1103 */
1104 if ((error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) != 0) {
1105 vput(vp);
1106 *vpp = NULL;
1107 return (error);
1108 }
1109 /*
1110 * Finish inode initialization now that aliasing has been resolved.
1111 */
1112 ip->i_devvp = ump->um_devvp;
1113 VREF(ip->i_devvp);
1114 /*
1115 * Set up a generation number for this inode if it does not
1116 * already have one. This should only happen on old filesystems.
1117 */
1118 if (ip->i_gen == 0) {
1119 ip->i_gen = random() / 2 + 1;
1120 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1121 ip->i_flag |= IN_MODIFIED;
1122 }
1123 *vpp = vp;
1124 return (0);
1125}
1126
1127/*
1128 * File handle to vnode
1129 *
1130 * Have to be really careful about stale file handles:
1131 * - check that the inode number is valid
1132 * - call ext2_vget() to get the locked inode
1133 * - check for an unallocated inode (i_mode == 0)
1134 * - check that the given client host has export rights and return
1135 * those rights via. exflagsp and credanonp
1136 */
1137static int
1138ext2_fhtovp(mp, fhp, vpp)
1139 register struct mount *mp;
1140 struct fid *fhp;
1141 struct vnode **vpp;
1142{
1143 register struct ufid *ufhp;
1144 struct ext2_sb_info *fs;
1145
1146 ufhp = (struct ufid *)fhp;
1147 fs = VFSTOUFS(mp)->um_e2fs;
1148 if (ufhp->ufid_ino < ROOTINO ||
1149 ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group)
1150 return (ESTALE);
1151 return (ufs_fhtovp(mp, ufhp, vpp));
1152}
1153
1154/*
1155 * Vnode pointer to File handle
1156 */
1157/* ARGSUSED */
1158static int
1159ext2_vptofh(vp, fhp)
1160 struct vnode *vp;
1161 struct fid *fhp;
1162{
1163 register struct inode *ip;
1164 register struct ufid *ufhp;
1165
1166 ip = VTOI(vp);
1167 ufhp = (struct ufid *)fhp;
1168 ufhp->ufid_len = sizeof(struct ufid);
1169 ufhp->ufid_ino = ip->i_number;
1170 ufhp->ufid_gen = ip->i_gen;
1171 return (0);
1172}
1173
1174/*
1175 * Write a superblock and associated information back to disk.
1176 */
1177static int
1178ext2_sbupdate(mp, waitfor)
1179 struct ufsmount *mp;
1180 int waitfor;
1181{
1182 register struct ext2_sb_info *fs = mp->um_e2fs;
1183 register struct ext2_super_block *es = fs->s_es;
1184 register struct buf *bp;
1185 int error = 0;
1186/*
1187printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
1188*/
1189 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
1190 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1191 if (waitfor == MNT_WAIT)
1192 error = bwrite(bp);
1193 else
1194 bawrite(bp);
1195
1196 /*
1197 * The buffers for group descriptors, inode bitmaps and block bitmaps
1198 * are not busy at this point and are (hopefully) written by the
1199 * usual sync mechanism. No need to write them here
1200 */
1201
1202 return (error);
1203}
|