Rename printf -> kprintf in sys/ and add some defines where necessary
[dragonfly.git] / sys / vfs / gnu / ext2fs / ext2_vfsops.c
CommitLineData
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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: src/sys/gnu/ext2fs/ext2_vfsops.c,v 1.63.2.7 2002/07/01 00:18:51 iedowse Exp $
086c1d7e 41 * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2_vfsops.c,v 1.52 2006/12/23 00:41:29 swildner Exp $
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42 */
43
44#include "opt_quota.h"
45
46#include <sys/param.h>
47#include <sys/systm.h>
fad57d0e 48#include <sys/nlookup.h>
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49#include <sys/proc.h>
50#include <sys/kernel.h>
51#include <sys/vnode.h>
52#include <sys/mount.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>
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59#include <vm/vm_zone.h>
60
7b95be2a 61#include <sys/buf2.h>
61670a01 62#include <sys/thread2.h>
984263bc 63
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64#include "quota.h"
65#include "dinode.h"
66#include "inode.h"
67#include "ext2mount.h"
68#include "ext2_extern.h"
984263bc 69
1f2de5d4 70#include "fs.h"
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71#include "ext2_fs.h"
72#include "ext2_fs_sb.h"
984263bc 73
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74extern struct vop_ops ext2_vnode_vops;
75extern struct vop_ops ext2_spec_vops;
76extern struct vop_ops ext2_fifo_vops;
0961aa92 77
a6ee311a 78static int ext2_fhtovp (struct mount *, struct fid *, struct vnode **);
f94bf21c 79static int ext2_flushfiles (struct mount *mp, int flags);
acde96db 80static int ext2_mount (struct mount *, char *, caddr_t, struct ucred *);
fef8985e 81static int ext2_mountfs (struct vnode *, struct mount *, struct ucred *);
1f1db49f 82static int ext2_root(struct mount *, struct vnode **);
f94bf21c 83static int ext2_reload (struct mount *mountp, struct ucred *cred);
1f1db49f 84static int ext2_sbupdate (struct ext2mount *, int);
acde96db 85static int ext2_statfs (struct mount *, struct statfs *, struct ucred *);
87de5057 86static int ext2_sync (struct mount *, int);
acde96db 87static int ext2_unmount (struct mount *, int);
a6ee311a 88static int ext2_vget (struct mount *, ino_t, struct vnode **);
1f1db49f 89static int ext2_init(struct vfsconf *);
a6ee311a 90static int ext2_vptofh (struct vnode *, struct fid *);
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91
92static MALLOC_DEFINE(M_EXT2NODE, "EXT2 node", "EXT2 vnode private part");
1f1db49f 93MALLOC_DEFINE(M_EXT2MNT, "EXT2 mount", "EXT2 mount structure");
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94
95static struct vfsops ext2fs_vfsops = {
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96 .vfs_mount = ext2_mount,
97 .vfs_unmount = ext2_unmount,
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98 .vfs_root = ext2_root, /* root inode via vget */
99 .vfs_quotactl = ext2_quotactl, /* quota operations */
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100 .vfs_statfs = ext2_statfs,
101 .vfs_sync = ext2_sync,
102 .vfs_vget = ext2_vget,
103 .vfs_fhtovp = ext2_fhtovp,
1f1db49f 104 .vfs_checkexp = ext2_check_export,
43c45e8f 105 .vfs_vptofh = ext2_vptofh,
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106 .vfs_init = ext2_init,
107 .vfs_uninit = ext2_uninit
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108};
109
110VFS_SET(ext2fs_vfsops, ext2fs, 0);
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111#define bsd_malloc kmalloc
112#define bsd_free kfree
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113
114static int ext2fs_inode_hash_lock;
115
a6ee311a 116static int ext2_check_sb_compat (struct ext2_super_block *es,
b13267a5 117 cdev_t dev, int ronly);
a6ee311a 118static int compute_sb_data (struct vnode * devvp,
984263bc 119 struct ext2_super_block * es,
a6ee311a 120 struct ext2_sb_info * fs);
984263bc 121
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122static int
123ext2_root(struct mount *mp, struct vnode **vpp)
124{
125 struct vnode *nvp;
126 int error;
127
128 error = VFS_VGET(mp, (ino_t)ROOTINO, &nvp);
129 if (error)
130 return (error);
131 *vpp = nvp;
132 return (0);
133}
134
135/*
136 * Do operations associated with quotas
137 */
138int
139ext2_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
acde96db 140 struct ucred *cred)
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141{
142#ifndef QUOTA
143 return (EOPNOTSUPP);
144#else
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145 int cmd, type, error;
146
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147 type = cmds & SUBCMDMASK;
148 cmd = cmds >> SUBCMDSHIFT;
149
150 if (uid == -1) {
151 switch(type) {
152 case USRQUOTA:
acde96db 153 uid = cred->cr_ruid;
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154 break;
155 case GRPQUOTA:
acde96db 156 uid = cred->cr_rgid;
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157 break;
158 default:
159 return (EINVAL);
160 }
161 }
162
163 switch (cmd) {
164 case Q_SYNC:
165 break;
166 case Q_GETQUOTA:
acde96db 167 if (uid == cred->cr_ruid)
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168 break;
169 /* fall through */
170 default:
acde96db 171 if ((error = suser_cred(cred, PRISON_ROOT)) != 0)
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172 return (error);
173 }
174
175 type = cmds & SUBCMDMASK;
176 if ((uint)type >= MAXQUOTAS)
177 return (EINVAL);
f9642f56 178 if (vfs_busy(mp, LK_NOWAIT))
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179 return (0);
180
181 switch (cmd) {
182
183 case Q_QUOTAON:
acde96db 184 error = ext2_quotaon(cred, mp, type, arg);
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185 break;
186
187 case Q_QUOTAOFF:
f94bf21c 188 error = ext2_quotaoff(mp, type);
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189 break;
190
191 case Q_SETQUOTA:
192 error = ext2_setquota(mp, uid, type, arg);
193 break;
194
195 case Q_SETUSE:
196 error = ext2_setuse(mp, uid, type, arg);
197 break;
198
199 case Q_GETQUOTA:
200 error = ext2_getquota(mp, uid, type, arg);
201 break;
202
203 case Q_SYNC:
204 error = ext2_qsync(mp);
205 break;
206
207 default:
208 error = EINVAL;
209 break;
210 }
f9642f56 211 vfs_unbusy(mp);
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212 return (error);
213#endif
214}
215
216/*
217 * Initial UFS filesystems, done only once.
218 */
219int
220ext2_init(struct vfsconf *vfsp)
221{
222 static int done;
223
224 if (done)
225 return (0);
226 done = 1;
227 ext2_ihashinit();
228#ifdef QUOTA
229 ext2_dqinit();
230#endif
231 return (0);
232}
233
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234/*
235 * VFS Operations.
236 *
237 * mount system call
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238 *
239 * Parameters:
1f1db49f 240 * data: this is actually a (struct ext2_args *)
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241 */
242static int
acde96db 243ext2_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
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244{
245 struct vnode *devvp;
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246 struct ext2_args args;
247 struct ext2mount *ump = 0;
f7aae92f 248 struct ext2_sb_info *fs;
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249 size_t size;
250 int error, flags;
251 mode_t accessmode;
fad57d0e 252 struct nlookupdata nd;
984263bc 253
1f1db49f 254 if ((error = copyin(data, (caddr_t)&args, sizeof (struct ext2_args))) != 0)
984263bc 255 return (error);
7b95be2a 256
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257 /*
258 * If updating, check whether changing from read-only to
259 * read/write; if there is no device name, that's all we do.
260 */
261 if (mp->mnt_flag & MNT_UPDATE) {
1f1db49f 262 ump = VFSTOEXT2(mp);
984263bc 263 fs = ump->um_e2fs;
8ddc6004 264 devvp = ump->um_devvp;
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265 error = 0;
266 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
267 flags = WRITECLOSE;
268 if (mp->mnt_flag & MNT_FORCE)
269 flags |= FORCECLOSE;
f9642f56 270 if (vfs_busy(mp, LK_NOWAIT))
984263bc 271 return (EBUSY);
f94bf21c 272 error = ext2_flushfiles(mp, flags);
f9642f56 273 vfs_unbusy(mp);
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274 if (!error && fs->s_wasvalid) {
275 fs->s_es->s_state |= EXT2_VALID_FS;
276 ext2_sbupdate(ump, MNT_WAIT);
277 }
278 fs->s_rd_only = 1;
ca466bae 279 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
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280 VOP_OPEN(devvp, FREAD, FSCRED, NULL);
281 VOP_CLOSE(devvp, FREAD|FWRITE);
a11aaa81 282 vn_unlock(devvp);
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283 }
284 if (!error && (mp->mnt_flag & MNT_RELOAD))
acde96db 285 error = ext2_reload(mp, cred);
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286 if (error)
287 return (error);
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288 if (ext2_check_sb_compat(fs->s_es, devvp->v_rdev,
289 (mp->mnt_kern_flag & MNTK_WANTRDWR) == 0) != 0)
290 return (EPERM);
291 if (fs->s_rd_only && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
292 /*
293 * If upgrade to read-write by non-root, then verify
294 * that user has necessary permissions on the device.
295 */
7b95be2a 296 if (cred->cr_uid != 0) {
ca466bae 297 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
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298 error = VOP_ACCESS(devvp, VREAD | VWRITE, cred);
299 if (error) {
a11aaa81 300 vn_unlock(devvp);
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301 return (error);
302 }
a11aaa81 303 vn_unlock(devvp);
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304 }
305
306 if ((fs->s_es->s_state & EXT2_VALID_FS) == 0 ||
307 (fs->s_es->s_state & EXT2_ERROR_FS)) {
308 if (mp->mnt_flag & MNT_FORCE) {
086c1d7e 309 kprintf(
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310"WARNING: %s was not properly dismounted\n",
311 fs->fs_fsmnt);
312 } else {
086c1d7e 313 kprintf(
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314"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
315 fs->fs_fsmnt);
316 return (EPERM);
317 }
318 }
319 fs->s_es->s_state &= ~EXT2_VALID_FS;
320 ext2_sbupdate(ump, MNT_WAIT);
321 fs->s_rd_only = 0;
ca466bae 322 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
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323 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL);
324 VOP_CLOSE(devvp, FREAD);
a11aaa81 325 vn_unlock(devvp);
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326 }
327 if (args.fspec == 0) {
328 /*
329 * Process export requests.
330 */
331 return (vfs_export(mp, &ump->um_export, &args.export));
332 }
333 }
334 /*
335 * Not an update, or updating the name: look up the name
336 * and verify that it refers to a sensible block device.
337 */
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338 devvp = NULL;
339 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
340 if (error == 0)
341 error = nlookup(&nd);
342 if (error == 0)
28623bf9 343 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
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344 nlookup_done(&nd);
345 if (error)
984263bc 346 return (error);
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347
348 if (!vn_isdisk(devvp, &error)) {
349 vrele(devvp);
350 return (error);
351 }
352
353 /*
354 * If mount by non-root, then verify that user has necessary
355 * permissions on the device.
356 */
7b95be2a 357 if (cred->cr_uid != 0) {
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358 accessmode = VREAD;
359 if ((mp->mnt_flag & MNT_RDONLY) == 0)
360 accessmode |= VWRITE;
ca466bae 361 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
87de5057 362 if ((error = VOP_ACCESS(devvp, accessmode, cred)) != 0) {
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363 vput(devvp);
364 return (error);
365 }
a11aaa81 366 vn_unlock(devvp);
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367 }
368
369 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
fef8985e 370 error = ext2_mountfs(devvp, mp, cred);
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371 } else {
372 if (devvp != ump->um_devvp)
373 error = EINVAL; /* needs translation */
374 else
375 vrele(devvp);
376 }
377 if (error) {
378 vrele(devvp);
379 return (error);
380 }
1f1db49f 381 ump = VFSTOEXT2(mp);
984263bc 382 fs = ump->um_e2fs;
fad57d0e 383 copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
984263bc 384 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
fad57d0e 385 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
984263bc 386 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
acde96db 387 ext2_statfs(mp, &mp->mnt_stat, cred);
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388 return (0);
389}
390
391/*
392 * checks that the data in the descriptor blocks make sense
393 * this is taken from ext2/super.c
394 */
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395static int
396ext2_check_descriptors(struct ext2_sb_info *sb)
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397{
398 int i;
399 int desc_block = 0;
400 unsigned long block = sb->s_es->s_first_data_block;
401 struct ext2_group_desc * gdp = NULL;
402
403 /* ext2_debug ("Checking group descriptors"); */
404
405 for (i = 0; i < sb->s_groups_count; i++)
406 {
407 /* examine next descriptor block */
408 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
409 gdp = (struct ext2_group_desc *)
410 sb->s_group_desc[desc_block++]->b_data;
411 if (gdp->bg_block_bitmap < block ||
412 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
413 {
086c1d7e 414 kprintf ("ext2_check_descriptors: "
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415 "Block bitmap for group %d"
416 " not in group (block %lu)!\n",
417 i, (unsigned long) gdp->bg_block_bitmap);
418 return 0;
419 }
420 if (gdp->bg_inode_bitmap < block ||
421 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
422 {
086c1d7e 423 kprintf ("ext2_check_descriptors: "
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424 "Inode bitmap for group %d"
425 " not in group (block %lu)!\n",
426 i, (unsigned long) gdp->bg_inode_bitmap);
427 return 0;
428 }
429 if (gdp->bg_inode_table < block ||
430 gdp->bg_inode_table + sb->s_itb_per_group >=
431 block + EXT2_BLOCKS_PER_GROUP(sb))
432 {
086c1d7e 433 kprintf ("ext2_check_descriptors: "
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434 "Inode table for group %d"
435 " not in group (block %lu)!\n",
436 i, (unsigned long) gdp->bg_inode_table);
437 return 0;
438 }
439 block += EXT2_BLOCKS_PER_GROUP(sb);
440 gdp++;
441 }
442 return 1;
443}
444
445static int
b13267a5 446ext2_check_sb_compat(struct ext2_super_block *es, cdev_t dev, int ronly)
984263bc 447{
984263bc 448 if (es->s_magic != EXT2_SUPER_MAGIC) {
086c1d7e 449 kprintf("ext2fs: %s: wrong magic number %#x (expected %#x)\n",
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450 devtoname(dev), es->s_magic, EXT2_SUPER_MAGIC);
451 return (1);
452 }
453 if (es->s_rev_level > EXT2_GOOD_OLD_REV) {
454 if (es->s_feature_incompat & ~EXT2_FEATURE_INCOMPAT_SUPP) {
086c1d7e 455 kprintf(
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456"WARNING: mount of %s denied due to unsupported optional features\n",
457 devtoname(dev));
458 return (1);
459 }
460 if (!ronly &&
461 (es->s_feature_ro_compat & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
086c1d7e 462 kprintf(
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463"WARNING: R/W mount of %s denied due to unsupported optional features\n",
464 devtoname(dev));
465 return (1);
466 }
467 }
468 return (0);
469}
470
471/*
472 * this computes the fields of the ext2_sb_info structure from the
473 * data in the ext2_super_block structure read in
474 */
0f7f7a49
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475static int
476compute_sb_data(struct vnode *devvp, struct ext2_super_block *es,
477 struct ext2_sb_info *fs)
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478{
479 int db_count, error;
480 int i, j;
481 int logic_sb_block = 1; /* XXX for now */
482
483#if 1
484#define V(v)
485#else
086c1d7e 486#define V(v) kprintf(#v"= %d\n", fs->v);
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487#endif
488
489 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
490 V(s_blocksize)
491 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
492 V(s_bshift)
493 fs->s_fsbtodb = es->s_log_block_size + 1;
494 V(s_fsbtodb)
495 fs->s_qbmask = fs->s_blocksize - 1;
496 V(s_bmask)
497 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
498 V(s_blocksize_bits)
499 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
500 V(s_frag_size)
501 if (fs->s_frag_size)
502 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
503 V(s_frags_per_block)
504 fs->s_blocks_per_group = es->s_blocks_per_group;
505 V(s_blocks_per_group)
506 fs->s_frags_per_group = es->s_frags_per_group;
507 V(s_frags_per_group)
508 fs->s_inodes_per_group = es->s_inodes_per_group;
509 V(s_inodes_per_group)
510 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
511 V(s_inodes_per_block)
512 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
513 V(s_itb_per_group)
514 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
515 V(s_desc_per_block)
516 /* s_resuid / s_resgid ? */
517 fs->s_groups_count = (es->s_blocks_count -
518 es->s_first_data_block +
519 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
520 EXT2_BLOCKS_PER_GROUP(fs);
521 V(s_groups_count)
522 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
523 EXT2_DESC_PER_BLOCK(fs);
524 fs->s_db_per_group = db_count;
525 V(s_db_per_group)
526
527 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
1f1db49f 528 M_EXT2MNT, M_WAITOK);
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529
530 /* adjust logic_sb_block */
531 if(fs->s_blocksize > SBSIZE)
532 /* Godmar thinks: if the blocksize is greater than 1024, then
533 the superblock is logically part of block zero.
534 */
535 logic_sb_block = 0;
536
537 for (i = 0; i < db_count; i++) {
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MD
538 error = bread(devvp, fsbtodoff(fs, logic_sb_block + i + 1),
539 fs->s_blocksize, &fs->s_group_desc[i]);
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540 if(error) {
541 for (j = 0; j < i; j++)
542 brelse(fs->s_group_desc[j]);
1f1db49f 543 bsd_free(fs->s_group_desc, M_EXT2MNT);
086c1d7e 544 kprintf("EXT2-fs: unable to read group descriptors (%d)\n", error);
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545 return EIO;
546 }
547 /* Set the B_LOCKED flag on the buffer, then brelse() it */
548 LCK_BUF(fs->s_group_desc[i])
549 }
550 if(!ext2_check_descriptors(fs)) {
551 for (j = 0; j < db_count; j++)
552 ULCK_BUF(fs->s_group_desc[j])
1f1db49f 553 bsd_free(fs->s_group_desc, M_EXT2MNT);
086c1d7e 554 kprintf("EXT2-fs: (ext2_check_descriptors failure) "
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555 "unable to read group descriptors\n");
556 return EIO;
557 }
558
559 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
560 fs->s_inode_bitmap_number[i] = 0;
561 fs->s_inode_bitmap[i] = NULL;
562 fs->s_block_bitmap_number[i] = 0;
563 fs->s_block_bitmap[i] = NULL;
564 }
565 fs->s_loaded_inode_bitmaps = 0;
566 fs->s_loaded_block_bitmaps = 0;
567 return 0;
568}
569
570/*
571 * Reload all incore data for a filesystem (used after running fsck on
572 * the root filesystem and finding things to fix). The filesystem must
573 * be mounted read-only.
574 *
575 * Things to do to update the mount:
576 * 1) invalidate all cached meta-data.
577 * 2) re-read superblock from disk.
578 * 3) re-read summary information from disk.
579 * 4) invalidate all inactive vnodes.
580 * 5) invalidate all cached file data.
581 * 6) re-read inode data for all active vnodes.
582 */
41a01a4d 583static int ext2_reload_scan1(struct mount *mp, struct vnode *vp, void *rescan);
5fd012e0 584static int ext2_reload_scan2(struct mount *mp, struct vnode *vp, void *rescan);
41a01a4d
MD
585
586struct scaninfo {
587 int rescan;
588 int allerror;
589 int waitfor;
41a01a4d
MD
590 struct vnode *devvp;
591 struct ext2_sb_info *fs;
592};
593
984263bc 594static int
f94bf21c 595ext2_reload(struct mount *mountp, struct ucred *cred)
984263bc 596{
41a01a4d 597 struct vnode *devvp;
984263bc
MD
598 struct buf *bp;
599 struct ext2_super_block * es;
600 struct ext2_sb_info *fs;
601 int error;
41a01a4d 602 struct scaninfo scaninfo;
984263bc
MD
603
604 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
605 return (EINVAL);
606 /*
607 * Step 1: invalidate all cached meta-data.
608 */
1f1db49f 609 devvp = VFSTOEXT2(mountp)->um_devvp;
87de5057 610 if (vinvalbuf(devvp, 0, 0, 0))
984263bc
MD
611 panic("ext2_reload: dirty1");
612 /*
613 * Step 2: re-read superblock from disk.
614 * constants have been adjusted for ext2
615 */
2d5c9276 616 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0)
984263bc
MD
617 return (error);
618 es = (struct ext2_super_block *)bp->b_data;
619 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) {
620 brelse(bp);
621 return (EIO); /* XXX needs translation */
622 }
1f1db49f 623 fs = VFSTOEXT2(mountp)->um_e2fs;
984263bc
MD
624 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
625
626 if((error = compute_sb_data(devvp, es, fs)) != 0) {
627 brelse(bp);
628 return error;
629 }
630#ifdef UNKLAR
631 if (fs->fs_sbsize < SBSIZE)
632 bp->b_flags |= B_INVAL;
633#endif
634 brelse(bp);
635
41a01a4d 636 scaninfo.rescan = 1;
41a01a4d
MD
637 scaninfo.devvp = devvp;
638 scaninfo.fs = fs;
639 while (error == 0 && scaninfo.rescan) {
640 scaninfo.rescan = 0;
5fd012e0 641 error = vmntvnodescan(mountp, VMSC_GETVX, ext2_reload_scan1,
41a01a4d
MD
642 ext2_reload_scan2, &scaninfo);
643 }
644 return(error);
645}
646
647static int
648ext2_reload_scan1(struct mount *mp, struct vnode *vp, void *data)
649{
5fd012e0 650 /*struct scaninfo *info = data;*/
41a01a4d 651
41a01a4d
MD
652 return(0);
653}
654
655static int
5fd012e0 656ext2_reload_scan2(struct mount *mp, struct vnode *vp, void *data)
41a01a4d
MD
657{
658 struct scaninfo *info = data;
659 struct inode *ip;
660 struct buf *bp;
661 int error;
662
663 /*
5fd012e0 664 * Try to recycle
41a01a4d 665 */
87de5057 666 if (vrecycle(vp))
41a01a4d 667 return(0);
5fd012e0
MD
668
669 /*
670 * Step 5: invalidate all cached file data.
671 */
87de5057 672 if (vinvalbuf(vp, 0, 0, 0))
41a01a4d
MD
673 panic("ext2_reload: dirty2");
674 /*
675 * Step 6: re-read inode data for all active vnodes.
676 */
677 ip = VTOI(vp);
54078292
MD
678 error = bread(info->devvp,
679 fsbtodoff(info->fs, ino_to_fsba(info->fs, ip->i_number)),
680 (int)info->fs->s_blocksize, &bp);
5fd012e0 681 if (error)
41a01a4d 682 return (error);
41a01a4d
MD
683 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
684 EXT2_INODE_SIZE * ino_to_fsbo(info->fs, ip->i_number)),
685 &ip->i_din);
686 brelse(bp);
41a01a4d 687 return(0);
984263bc
MD
688}
689
690/*
691 * Common code for mount and mountroot
692 */
693static int
fef8985e 694ext2_mountfs(struct vnode *devvp, struct mount *mp, struct ucred *cred)
984263bc 695{
1f1db49f 696 struct ext2mount *ump;
984263bc 697 struct buf *bp;
f7aae92f 698 struct ext2_sb_info *fs;
984263bc 699 struct ext2_super_block * es;
b13267a5 700 cdev_t dev;
984263bc
MD
701 struct partinfo dpart;
702 int havepart = 0;
703 int error, i, size;
704 int ronly;
705
706 /*
707 * Disallow multiple mounts of the same device.
708 * Disallow mounting of a device that is currently in use
709 * (except for root, which might share swap device for miniroot).
710 * Flush out any old buffers remaining from a previous use.
711 */
712 if ((error = vfs_mountedon(devvp)) != 0)
713 return (error);
21739618 714 if (count_udev(devvp->v_udev) > 0)
984263bc 715 return (EBUSY);
87de5057 716 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0)) != 0)
984263bc
MD
717 return (error);
718#ifdef READONLY
719/* turn on this to force it to be read-only */
720 mp->mnt_flag |= MNT_RDONLY;
721#endif
722
723 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
ca466bae 724 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
87de5057 725 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
a11aaa81 726 vn_unlock(devvp);
984263bc
MD
727 if (error)
728 return (error);
e4c9c0c8
MD
729 dev = devvp->v_rdev;
730 if (dev->si_iosize_max != 0)
731 mp->mnt_iosize_max = dev->si_iosize_max;
984263bc
MD
732 if (mp->mnt_iosize_max > MAXPHYS)
733 mp->mnt_iosize_max = MAXPHYS;
fef8985e 734 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred) != 0)
984263bc
MD
735 size = DEV_BSIZE;
736 else {
737 havepart = 1;
738 size = dpart.disklab->d_secsize;
739 }
740
741 bp = NULL;
742 ump = NULL;
2d5c9276 743 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0)
984263bc
MD
744 goto out;
745 es = (struct ext2_super_block *)bp->b_data;
746 if (ext2_check_sb_compat(es, dev, ronly) != 0) {
747 error = EINVAL; /* XXX needs translation */
748 goto out;
749 }
750 if ((es->s_state & EXT2_VALID_FS) == 0 ||
751 (es->s_state & EXT2_ERROR_FS)) {
752 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
086c1d7e 753 kprintf(
984263bc
MD
754"WARNING: Filesystem was not properly dismounted\n");
755 } else {
086c1d7e 756 kprintf(
984263bc
MD
757"WARNING: R/W mount denied. Filesystem is not clean - run fsck\n");
758 error = EPERM;
759 goto out;
760 }
761 }
1f1db49f 762 ump = bsd_malloc(sizeof *ump, M_EXT2MNT, M_WAITOK);
984263bc
MD
763 bzero((caddr_t)ump, sizeof *ump);
764 ump->um_malloctype = M_EXT2NODE;
765 ump->um_blkatoff = ext2_blkatoff;
766 ump->um_truncate = ext2_truncate;
767 ump->um_update = ext2_update;
768 ump->um_valloc = ext2_valloc;
769 ump->um_vfree = ext2_vfree;
770 /* I don't know whether this is the right strategy. Note that
771 we dynamically allocate both a ext2_sb_info and a ext2_super_block
772 while Linux keeps the super block in a locked buffer
773 */
774 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
1f1db49f 775 M_EXT2MNT, M_WAITOK);
984263bc 776 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
1f1db49f 777 M_EXT2MNT, M_WAITOK);
984263bc
MD
778 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
779 if ((error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)))
780 goto out;
781 /*
782 * We don't free the group descriptors allocated by compute_sb_data()
783 * until ext2_unmount(). This is OK since the mount will succeed.
784 */
785 brelse(bp);
786 bp = NULL;
787 fs = ump->um_e2fs;
788 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
789 /* if the fs is not mounted read-only, make sure the super block is
790 always written back on a sync()
791 */
792 fs->s_wasvalid = fs->s_es->s_state & EXT2_VALID_FS ? 1 : 0;
793 if (ronly == 0) {
794 fs->s_dirt = 1; /* mark it modified */
795 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
796 }
797 mp->mnt_data = (qaddr_t)ump;
798 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
799 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
800 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
801 mp->mnt_flag |= MNT_LOCAL;
802 ump->um_mountp = mp;
803 ump->um_dev = dev;
804 ump->um_devvp = devvp;
805 /* setting those two parameters allows us to use
1f1db49f 806 ext2_bmap w/o changse !
984263bc
MD
807 */
808 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
809 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
810 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
811 for (i = 0; i < MAXQUOTAS; i++)
812 ump->um_quotas[i] = NULLVP;
e4c9c0c8 813 dev->si_mountpoint = mp;
0961aa92 814
66a1ddf5
MD
815 vfs_add_vnodeops(mp, &ext2_vnode_vops, &mp->mnt_vn_norm_ops);
816 vfs_add_vnodeops(mp, &ext2_spec_vops, &mp->mnt_vn_spec_ops);
817 vfs_add_vnodeops(mp, &ext2_fifo_vops, &mp->mnt_vn_fifo_ops);
0961aa92 818
984263bc
MD
819 if (ronly == 0)
820 ext2_sbupdate(ump, MNT_WAIT);
821 return (0);
822out:
823 if (bp)
824 brelse(bp);
87de5057 825 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE);
984263bc 826 if (ump) {
1f1db49f
MD
827 bsd_free(ump->um_e2fs->s_es, M_EXT2MNT);
828 bsd_free(ump->um_e2fs, M_EXT2MNT);
829 bsd_free(ump, M_EXT2MNT);
984263bc
MD
830 mp->mnt_data = (qaddr_t)0;
831 }
832 return (error);
833}
834
835/*
836 * unmount system call
837 */
838static int
acde96db 839ext2_unmount(struct mount *mp, int mntflags)
984263bc 840{
1f1db49f 841 struct ext2mount *ump;
f7aae92f 842 struct ext2_sb_info *fs;
984263bc
MD
843 int error, flags, ronly, i;
844
845 flags = 0;
846 if (mntflags & MNT_FORCE) {
847 if (mp->mnt_flag & MNT_ROOTFS)
848 return (EINVAL);
849 flags |= FORCECLOSE;
850 }
f94bf21c 851 if ((error = ext2_flushfiles(mp, flags)) != 0)
984263bc 852 return (error);
1f1db49f 853 ump = VFSTOEXT2(mp);
984263bc
MD
854 fs = ump->um_e2fs;
855 ronly = fs->s_rd_only;
856 if (ronly == 0) {
857 if (fs->s_wasvalid)
858 fs->s_es->s_state |= EXT2_VALID_FS;
859 ext2_sbupdate(ump, MNT_WAIT);
860 }
861
862 /* release buffers containing group descriptors */
863 for(i = 0; i < fs->s_db_per_group; i++)
864 ULCK_BUF(fs->s_group_desc[i])
1f1db49f 865 bsd_free(fs->s_group_desc, M_EXT2MNT);
984263bc
MD
866
867 /* release cached inode/block bitmaps */
868 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
869 if (fs->s_inode_bitmap[i])
870 ULCK_BUF(fs->s_inode_bitmap[i])
871
872 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
873 if (fs->s_block_bitmap[i])
874 ULCK_BUF(fs->s_block_bitmap[i])
875
e4c9c0c8 876 ump->um_devvp->v_rdev->si_mountpoint = NULL;
87de5057 877 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE);
984263bc 878 vrele(ump->um_devvp);
1f1db49f
MD
879 bsd_free(fs->s_es, M_EXT2MNT);
880 bsd_free(fs, M_EXT2MNT);
881 bsd_free(ump, M_EXT2MNT);
984263bc
MD
882 mp->mnt_data = (qaddr_t)0;
883 mp->mnt_flag &= ~MNT_LOCAL;
884 return (error);
885}
886
887/*
888 * Flush out all the files in a filesystem.
889 */
890static int
f94bf21c 891ext2_flushfiles(struct mount *mp, int flags)
984263bc 892{
1f1db49f 893 struct ext2mount *ump;
984263bc
MD
894 int error;
895#if QUOTA
896 int i;
897#endif
898
1f1db49f 899 ump = VFSTOEXT2(mp);
984263bc
MD
900#if QUOTA
901 if (mp->mnt_flag & MNT_QUOTA) {
902 if ((error = vflush(mp, 0, SKIPSYSTEM|flags)) != 0)
903 return (error);
904 for (i = 0; i < MAXQUOTAS; i++) {
905 if (ump->um_quotas[i] == NULLVP)
906 continue;
f94bf21c 907 ext2_quotaoff(mp, i);
984263bc
MD
908 }
909 /*
910 * Here we fall through to vflush again to ensure
911 * that we have gotten rid of all the system vnodes.
912 */
913 }
914#endif
915 error = vflush(mp, 0, flags);
916 return (error);
917}
918
919/*
920 * Get file system statistics.
921 * taken from ext2/super.c ext2_statfs
922 */
923static int
acde96db 924ext2_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
984263bc
MD
925{
926 unsigned long overhead;
1f1db49f 927 struct ext2mount *ump;
f7aae92f
RG
928 struct ext2_sb_info *fs;
929 struct ext2_super_block *es;
984263bc
MD
930 int i, nsb;
931
1f1db49f 932 ump = VFSTOEXT2(mp);
984263bc
MD
933 fs = ump->um_e2fs;
934 es = fs->s_es;
935
936 if (es->s_magic != EXT2_SUPER_MAGIC)
937 panic("ext2_statfs - magic number spoiled");
938
939 /*
940 * Compute the overhead (FS structures)
941 */
942 if (es->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
943 nsb = 0;
944 for (i = 0 ; i < fs->s_groups_count; i++)
945 if (ext2_group_sparse(i))
946 nsb++;
947 } else
948 nsb = fs->s_groups_count;
949 overhead = es->s_first_data_block +
950 /* Superblocks and block group descriptors: */
951 nsb * (1 + fs->s_db_per_group) +
952 /* Inode bitmap, block bitmap, and inode table: */
953 fs->s_groups_count * (1 + 1 + fs->s_itb_per_group);
954
955 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
956 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
957 sbp->f_blocks = es->s_blocks_count - overhead;
958 sbp->f_bfree = es->s_free_blocks_count;
959 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
960 sbp->f_files = es->s_inodes_count;
961 sbp->f_ffree = es->s_free_inodes_count;
962 if (sbp != &mp->mnt_stat) {
963 sbp->f_type = mp->mnt_vfc->vfc_typenum;
984263bc
MD
964 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
965 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
966 }
967 return (0);
968}
969
970/*
971 * Go through the disk queues to initiate sandbagged IO;
972 * go through the inodes to write those that have been modified;
973 * initiate the writing of the super block if it has been modified.
974 *
975 * Note: we are always called with the filesystem marked `MPBUSY'.
976 */
41a01a4d 977
5fd012e0 978static int ext2_sync_scan(struct mount *mp, struct vnode *vp, void *data);
41a01a4d 979
984263bc 980static int
87de5057 981ext2_sync(struct mount *mp, int waitfor)
984263bc 982{
1f1db49f 983 struct ext2mount *ump = VFSTOEXT2(mp);
984263bc 984 struct ext2_sb_info *fs;
41a01a4d
MD
985 struct scaninfo scaninfo;
986 int error;
984263bc
MD
987
988 fs = ump->um_e2fs;
989 if (fs->s_dirt != 0 && fs->s_rd_only != 0) { /* XXX */
086c1d7e 990 kprintf("fs = %s\n", fs->fs_fsmnt);
984263bc
MD
991 panic("ext2_sync: rofs mod");
992 }
41a01a4d 993
984263bc
MD
994 /*
995 * Write back each (modified) inode.
996 */
41a01a4d
MD
997 scaninfo.allerror = 0;
998 scaninfo.rescan = 1;
999 scaninfo.waitfor = waitfor;
41a01a4d
MD
1000 while (scaninfo.rescan) {
1001 scaninfo.rescan = 0;
5fd012e0
MD
1002 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT,
1003 NULL, ext2_sync_scan, &scaninfo);
984263bc 1004 }
41a01a4d 1005
984263bc
MD
1006 /*
1007 * Force stale file system control information to be flushed.
1008 */
1009 if (waitfor != MNT_LAZY) {
ca466bae 1010 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
87de5057 1011 if ((error = VOP_FSYNC(ump->um_devvp, waitfor)) != 0)
41a01a4d 1012 scaninfo.allerror = error;
a11aaa81 1013 vn_unlock(ump->um_devvp);
984263bc
MD
1014 }
1015#if QUOTA
1f1db49f 1016 ext2_qsync(mp);
984263bc
MD
1017#endif
1018 /*
1019 * Write back modified superblock.
1020 */
1021 if (fs->s_dirt != 0) {
1022 fs->s_dirt = 0;
1023 fs->s_es->s_wtime = time_second;
1024 if ((error = ext2_sbupdate(ump, waitfor)) != 0)
41a01a4d
MD
1025 scaninfo.allerror = error;
1026 }
1027 return (scaninfo.allerror);
1028}
1029
1030static int
5fd012e0 1031ext2_sync_scan(struct mount *mp, struct vnode *vp, void *data)
41a01a4d
MD
1032{
1033 struct scaninfo *info = data;
1034 struct inode *ip;
1035 int error;
1036
1037 ip = VTOI(vp);
1038 if (vp->v_type == VNON ||
1039 ((ip->i_flag &
1040 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
6bae6177 1041 (RB_EMPTY(&vp->v_rbdirty_tree) || info->waitfor == MNT_LAZY))) {
41a01a4d 1042 return(0);
984263bc 1043 }
87de5057 1044 if ((error = VOP_FSYNC(vp, info->waitfor)) != 0)
41a01a4d 1045 info->allerror = error;
41a01a4d 1046 return(0);
984263bc
MD
1047}
1048
1049/*
1050 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
1051 * in from disk. If it is in core, wait for the lock bit to clear, then
1052 * return the inode locked. Detection and handling of mount points must be
1053 * done by the calling routine.
1054 */
1055static int
0f7f7a49 1056ext2_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
984263bc 1057{
f7aae92f
RG
1058 struct ext2_sb_info *fs;
1059 struct inode *ip;
1f1db49f 1060 struct ext2mount *ump;
984263bc
MD
1061 struct buf *bp;
1062 struct vnode *vp;
b13267a5 1063 cdev_t dev;
984263bc
MD
1064 int i, error;
1065 int used_blocks;
1066
1f1db49f 1067 ump = VFSTOEXT2(mp);
984263bc
MD
1068 dev = ump->um_dev;
1069restart:
1f1db49f 1070 if ((*vpp = ext2_ihashget(dev, ino)) != NULL)
984263bc
MD
1071 return (0);
1072
1073 /*
1074 * Lock out the creation of new entries in the FFS hash table in
1075 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
1076 * may occur!
1077 */
1078 if (ext2fs_inode_hash_lock) {
1079 while (ext2fs_inode_hash_lock) {
1080 ext2fs_inode_hash_lock = -1;
377d4740 1081 tsleep(&ext2fs_inode_hash_lock, 0, "e2vget", 0);
984263bc
MD
1082 }
1083 goto restart;
1084 }
1085 ext2fs_inode_hash_lock = 1;
1086
1087 /*
1088 * If this MALLOC() is performed after the getnewvnode()
1089 * it might block, leaving a vnode with a NULL v_data to be
1090 * found by ext2_sync() if a sync happens to fire right then,
1091 * which will cause a panic because ext2_sync() blindly
1092 * dereferences vp->v_data (as well it should).
1093 */
1094 MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK);
1095
1096 /* Allocate a new vnode/inode. */
1f1db49f 1097 if ((error = getnewvnode(VT_EXT2FS, mp, &vp, 0, LK_CANRECURSE)) != 0) {
984263bc
MD
1098 if (ext2fs_inode_hash_lock < 0)
1099 wakeup(&ext2fs_inode_hash_lock);
1100 ext2fs_inode_hash_lock = 0;
1101 *vpp = NULL;
1102 FREE(ip, M_EXT2NODE);
1103 return (error);
1104 }
1105 bzero((caddr_t)ip, sizeof(struct inode));
984263bc
MD
1106 vp->v_data = ip;
1107 ip->i_vnode = vp;
1108 ip->i_e2fs = fs = ump->um_e2fs;
1109 ip->i_dev = dev;
1110 ip->i_number = ino;
1111#if QUOTA
1112 for (i = 0; i < MAXQUOTAS; i++)
1113 ip->i_dquot[i] = NODQUOT;
1114#endif
1115 /*
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1116 * Put it onto its hash chain. Since our vnode is locked, other
1117 * requests for this inode will block if they arrive while we are
1118 * sleeping waiting for old data structures to be purged or for the
1119 * contents of the disk portion of this inode to be read.
984263bc 1120 */
1f1db49f 1121 ext2_ihashins(ip);
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1122
1123 if (ext2fs_inode_hash_lock < 0)
1124 wakeup(&ext2fs_inode_hash_lock);
1125 ext2fs_inode_hash_lock = 0;
1126
1127 /* Read in the disk contents for the inode, copy into the inode. */
1128#if 0
086c1d7e 1129kprintf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
984263bc 1130#endif
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1131 error = bread(ump->um_devvp, fsbtodoff(fs, ino_to_fsba(fs, ino)),
1132 (int)fs->s_blocksize, &bp);
1133 if (error) {
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1134 /*
1135 * The inode does not contain anything useful, so it would
1136 * be misleading to leave it on its hash chain. With mode
1137 * still zero, it will be unlinked and returned to the free
1138 * list by vput().
1139 */
5fd012e0 1140 vx_put(vp);
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1141 brelse(bp);
1142 *vpp = NULL;
1143 return (error);
1144 }
1145 /* convert ext2 inode to dinode */
1146 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1147 ino_to_fsbo(fs, ino)), &ip->i_din);
1148 ip->i_block_group = ino_to_cg(fs, ino);
1149 ip->i_next_alloc_block = 0;
1150 ip->i_next_alloc_goal = 0;
1151 ip->i_prealloc_count = 0;
1152 ip->i_prealloc_block = 0;
1153 /* now we want to make sure that block pointers for unused
1154 blocks are zeroed out - ext2_balloc depends on this
1155 although for regular files and directories only
1156 */
1157 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1158 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1159 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1160 ip->i_db[i] = 0;
1161 }
933a3a0d 1162#if 0
984263bc 1163 ext2_print_inode(ip);
933a3a0d 1164#endif
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1165 brelse(bp);
1166
1167 /*
1168 * Initialize the vnode from the inode, check for aliases.
1169 * Note that the underlying vnode may have changed.
1170 */
1f1db49f 1171 if ((error = ext2_vinit(mp, &vp)) != 0) {
5fd012e0 1172 vx_put(vp);
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1173 *vpp = NULL;
1174 return (error);
1175 }
93f50d60 1176
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1177 /*
1178 * Finish inode initialization now that aliasing has been resolved.
1179 */
1180 ip->i_devvp = ump->um_devvp;
597aea93 1181 vref(ip->i_devvp);
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1182 /*
1183 * Set up a generation number for this inode if it does not
1184 * already have one. This should only happen on old filesystems.
1185 */
1186 if (ip->i_gen == 0) {
cddfb7bb 1187 ip->i_gen = krandom() / 2 + 1;
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1188 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1189 ip->i_flag |= IN_MODIFIED;
1190 }
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1191 /*
1192 * Return the locked and refd vnode.
1193 */
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1194 *vpp = vp;
1195 return (0);
1196}
1197
1198/*
1199 * File handle to vnode
1200 *
1201 * Have to be really careful about stale file handles:
1202 * - check that the inode number is valid
1203 * - call ext2_vget() to get the locked inode
1204 * - check for an unallocated inode (i_mode == 0)
1205 * - check that the given client host has export rights and return
1206 * those rights via. exflagsp and credanonp
1207 */
1208static int
0f7f7a49 1209ext2_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
984263bc 1210{
f7aae92f 1211 struct ufid *ufhp;
984263bc 1212 struct ext2_sb_info *fs;
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1213 struct inode *ip;
1214 struct vnode *nvp;
1215 int error;
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1216
1217 ufhp = (struct ufid *)fhp;
1f1db49f 1218 fs = VFSTOEXT2(mp)->um_e2fs;
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1219 if (ufhp->ufid_ino < ROOTINO ||
1220 ufhp->ufid_ino > fs->s_groups_count * fs->s_es->s_inodes_per_group)
1221 return (ESTALE);
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1222
1223 error = VFS_VGET(mp, ufhp->ufid_ino, &nvp);
1224 if (error) {
1225 *vpp = NULLVP;
1226 return (error);
1227 }
1228 ip = VTOI(nvp);
1229 if (ip->i_mode == 0 ||
1230 ip->i_gen != ufhp->ufid_gen ||
1231 (VFSTOEXT2(mp)->um_i_effnlink_valid ? ip->i_effnlink :
1232 ip->i_nlink) <= 0) {
1233 vput(nvp);
1234 *vpp = NULLVP;
1235 return (ESTALE);
1236 }
1237 *vpp = nvp;
1238 return (0);
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1239}
1240
1241/*
1242 * Vnode pointer to File handle
1243 */
1244/* ARGSUSED */
1245static int
0f7f7a49 1246ext2_vptofh(struct vnode *vp, struct fid *fhp)
984263bc 1247{
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1248 struct inode *ip;
1249 struct ufid *ufhp;
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1250
1251 ip = VTOI(vp);
1252 ufhp = (struct ufid *)fhp;
1253 ufhp->ufid_len = sizeof(struct ufid);
1254 ufhp->ufid_ino = ip->i_number;
1255 ufhp->ufid_gen = ip->i_gen;
1256 return (0);
1257}
1258
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1259/*
1260 * This is the generic part of fhtovp called after the underlying
1261 * filesystem has validated the file handle.
1262 *
1263 * Verify that a host should have access to a filesystem.
1264 */
1265int
1266ext2_check_export(struct mount *mp, struct sockaddr *nam, int *exflagsp,
1267 struct ucred **credanonp)
1268{
1269 struct netcred *np;
fc6d0222 1270 struct ext2mount *ump;
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1271
1272 ump = VFSTOEXT2(mp);
1273 /*
1274 * Get the export permission structure for this <mp, client> tuple.
1275 */
1276 np = vfs_export_lookup(mp, &ump->um_export, nam);
1277 if (np == NULL)
1278 return (EACCES);
1279
1280 *exflagsp = np->netc_exflags;
1281 *credanonp = &np->netc_anon;
1282 return (0);
1283}
1284
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1285/*
1286 * Write a superblock and associated information back to disk.
1287 */
1288static int
1f1db49f 1289ext2_sbupdate(struct ext2mount *mp, int waitfor)
984263bc 1290{
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1291 struct ext2_sb_info *fs = mp->um_e2fs;
1292 struct ext2_super_block *es = fs->s_es;
1293 struct buf *bp;
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1294 int error = 0;
1295/*
086c1d7e 1296kprintf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
984263bc 1297*/
2d5c9276 1298 bp = getblk(mp->um_devvp, SBOFF, SBSIZE, 0, 0);
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1299 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1300 if (waitfor == MNT_WAIT)
1301 error = bwrite(bp);
1302 else
1303 bawrite(bp);
1304
1305 /*
1306 * The buffers for group descriptors, inode bitmaps and block bitmaps
1307 * are not busy at this point and are (hopefully) written by the
1308 * usual sync mechanism. No need to write them here
0f7f7a49 1309 */
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1310
1311 return (error);
1312}