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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[linux-block.git] / fs / ufs / super.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/*
3 * linux/fs/ufs/super.c
4 *
5 * Copyright (C) 1998
6 * Daniel Pirkl <daniel.pirkl@email.cz>
7 * Charles University, Faculty of Mathematics and Physics
8 */
9
10/* Derived from
11 *
12 * linux/fs/ext2/super.c
13 *
14 * Copyright (C) 1992, 1993, 1994, 1995
15 * Remy Card (card@masi.ibp.fr)
16 * Laboratoire MASI - Institut Blaise Pascal
17 * Universite Pierre et Marie Curie (Paris VI)
18 *
19 * from
20 *
21 * linux/fs/minix/inode.c
22 *
23 * Copyright (C) 1991, 1992 Linus Torvalds
24 *
25 * Big-endian to little-endian byte-swapping/bitmaps by
26 * David S. Miller (davem@caip.rutgers.edu), 1995
27 */
28
29/*
30 * Inspired by
31 *
32 * linux/fs/ufs/super.c
33 *
34 * Copyright (C) 1996
35 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
36 * Laboratory for Computer Science Research Computing Facility
37 * Rutgers, The State University of New Jersey
38 *
39 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
40 *
41 * Kernel module support added on 96/04/26 by
42 * Stefan Reinauer <stepan@home.culture.mipt.ru>
43 *
44 * Module usage counts added on 96/04/29 by
f762dd68 45 * Gertjan van Wingerde <gwingerde@gmail.com>
1da177e4
LT		 46 *
47 * Clean swab support on 19970406 by
48 * Francois-Rene Rideau <fare@tunes.org>
49 *
50 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
51 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
52 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
53 *
54 * NeXTstep support added on February 5th 1998 by
55 * Niels Kristian Bech Jensen <nkbj@image.dk>.
56 *
57 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
58 *
59 * HP/UX hfs filesystem support added by
60 * Martin K. Petersen <mkp@mkp.net>, August 1999
61 *
62 * UFS2 (of FreeBSD 5.x) support added by
63 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
64 *
cbcae39f
ED		 65 * UFS2 write support added by
66 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
1da177e4
LT		 67 */
68
f3e2a520 69#include <linux/exportfs.h>
1da177e4
LT		 70#include <linux/module.h>
71#include <linux/bitops.h>
72
c0891ac1 73#include <linux/stdarg.h>
1da177e4 74
7c0f6ba6 75#include <linux/uaccess.h>
1da177e4
LT		 76
77#include <linux/errno.h>
78#include <linux/fs.h>
1da177e4
LT		 79#include <linux/slab.h>
80#include <linux/time.h>
81#include <linux/stat.h>
82#include <linux/string.h>
83#include <linux/blkdev.h>
66114cad 84#include <linux/backing-dev.h>
1da177e4
LT		 85#include <linux/init.h>
86#include <linux/parser.h>
1da177e4
LT		 87#include <linux/buffer_head.h>
88#include <linux/vfs.h>
9e8c4273 89#include <linux/log2.h>
2a9807c0
ED		 90#include <linux/mount.h>
91#include <linux/seq_file.h>
bb8c2d66 92#include <linux/iversion.h>
1da177e4 93
e5420598 94#include "ufs_fs.h"
bcd6d4ec 95#include "ufs.h"
1da177e4
LT		 96#include "swab.h"
97#include "util.h"
98
f3e2a520
AD		 99static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
100{
101 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
102 struct inode *inode;
103
88b2e9b0 104 if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
f3e2a520
AD		 105 return ERR_PTR(-ESTALE);
106
107 inode = ufs_iget(sb, ino);
108 if (IS_ERR(inode))
109 return ERR_CAST(inode);
110 if (generation && inode->i_generation != generation) {
111 iput(inode);
112 return ERR_PTR(-ESTALE);
113 }
114 return inode;
115}
116
117static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
118 int fh_len, int fh_type)
119{
120 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
121}
122
123static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
124 int fh_len, int fh_type)
125{
126 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
127}
128
129static struct dentry *ufs_get_parent(struct dentry *child)
130{
f3e2a520
AD		 131 ino_t ino;
132
80e5d1ff 133 ino = ufs_inode_by_name(d_inode(child), &dotdot_name);
f3e2a520
AD		 134 if (!ino)
135 return ERR_PTR(-ENOENT);
fc64005c 136 return d_obtain_alias(ufs_iget(child->d_sb, ino));
f3e2a520
AD		 137}
138
139static const struct export_operations ufs_export_ops = {
140 .fh_to_dentry = ufs_fh_to_dentry,
141 .fh_to_parent = ufs_fh_to_parent,
142 .get_parent = ufs_get_parent,
143};
144
abf5d15f 145#ifdef CONFIG_UFS_DEBUG
1da177e4
LT		 146/*
147 * Print contents of ufs_super_block, useful for debugging
148 */
3313e292 149static void ufs_print_super_stuff(struct super_block *sb,
647b7e87
ED		 150 struct ufs_super_block_first *usb1,
151 struct ufs_super_block_second *usb2,
152 struct ufs_super_block_third *usb3)
1da177e4 153{
3313e292
ED		 154 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
155
a9814c5d
FF		 156 pr_debug("ufs_print_super_stuff\n");
157 pr_debug(" magic: 0x%x\n", magic);
3313e292 158 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
a9814c5d
FF		 159 pr_debug(" fs_size: %llu\n", (unsigned long long)
160 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
161 pr_debug(" fs_dsize: %llu\n", (unsigned long long)
162 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
163 pr_debug(" bsize: %u\n",
164 fs32_to_cpu(sb, usb1->fs_bsize));
165 pr_debug(" fsize: %u\n",
166 fs32_to_cpu(sb, usb1->fs_fsize));
167 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
168 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
169 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
170 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
171 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
172 pr_debug(" cs_nbfree(No of free blocks): %llu\n",
173 (unsigned long long)
174 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
175 pr_info(" cs_nifree(Num of free inodes): %llu\n",
176 (unsigned long long)
177 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
178 pr_info(" cs_nffree(Num of free frags): %llu\n",
179 (unsigned long long)
180 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
181 pr_info(" fs_maxsymlinklen: %u\n",
182 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
647b7e87 183 } else {
a9814c5d
FF		 184 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
185 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
186 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
187 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
188 pr_debug(" cgoffset: %u\n",
189 fs32_to_cpu(sb, usb1->fs_cgoffset));
190 pr_debug(" ~cgmask: 0x%x\n",
191 ~fs32_to_cpu(sb, usb1->fs_cgmask));
192 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
193 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
194 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
195 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
196 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
197 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
198 pr_debug(" fragshift: %u\n",
199 fs32_to_cpu(sb, usb1->fs_fragshift));
200 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
201 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
202 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
203 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
204 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
205 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
206 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
207 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
208 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
209 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
210 pr_debug(" fstodb: %u\n",
211 fs32_to_cpu(sb, usb1->fs_fsbtodb));
212 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
213 pr_debug(" ndir %u\n",
214 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
215 pr_debug(" nifree %u\n",
216 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
217 pr_debug(" nbfree %u\n",
218 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
219 pr_debug(" nffree %u\n",
220 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
647b7e87 221 }
a9814c5d 222 pr_debug("\n");
1da177e4
LT		 223}
224
225/*
226 * Print contents of ufs_cylinder_group, useful for debugging
227 */
647b7e87
ED		 228static void ufs_print_cylinder_stuff(struct super_block *sb,
229 struct ufs_cylinder_group *cg)
1da177e4 230{
a9814c5d
FF		 231 pr_debug("\nufs_print_cylinder_stuff\n");
232 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
233 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
234 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
235 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
236 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
237 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
238 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
239 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
240 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
241 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
242 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
243 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
244 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
245 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
246 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
1da177e4
LT		 247 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
248 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
249 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
250 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
a9814c5d
FF		 251 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
252 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
253 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
254 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
255 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
256 pr_debug(" clustersumoff %u\n",
257 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
258 pr_debug(" clusteroff %u\n",
259 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
260 pr_debug(" nclusterblks %u\n",
261 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
262 pr_debug("\n");
1da177e4 263}
647b7e87 264#else
3313e292 265# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
647b7e87 266# define ufs_print_cylinder_stuff(sb, cg) /**/
abf5d15f 267#endif /* CONFIG_UFS_DEBUG */
1da177e4 268
ee9b6d61 269static const struct super_operations ufs_super_ops;
1da177e4 270
1da177e4
LT		 271void ufs_error (struct super_block * sb, const char * function,
272 const char * fmt, ...)
273{
274 struct ufs_sb_private_info * uspi;
275 struct ufs_super_block_first * usb1;
7e1e4167 276 struct va_format vaf;
1da177e4
LT		 277 va_list args;
278
279 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 280 usb1 = ubh_get_usb_first(uspi);
1da177e4 281
bc98a42c 282 if (!sb_rdonly(sb)) {
1da177e4 283 usb1->fs_clean = UFS_FSBAD;
9695ef16 284 ubh_mark_buffer_dirty(USPI_UBH(uspi));
9e9ad5f4 285 ufs_mark_sb_dirty(sb);
1751e8a6 286 sb->s_flags |= SB_RDONLY;
1da177e4 287 }
7e1e4167
FF		 288 va_start(args, fmt);
289 vaf.fmt = fmt;
290 vaf.va = &args;
1da177e4
LT		 291 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
292 case UFS_MOUNT_ONERROR_PANIC:
7e1e4167
FF		 293 panic("panic (device %s): %s: %pV\n",
294 sb->s_id, function, &vaf);
1da177e4
LT		 295
296 case UFS_MOUNT_ONERROR_LOCK:
297 case UFS_MOUNT_ONERROR_UMOUNT:
298 case UFS_MOUNT_ONERROR_REPAIR:
7e1e4167
FF		 299 pr_crit("error (device %s): %s: %pV\n",
300 sb->s_id, function, &vaf);
301 }
302 va_end(args);
1da177e4
LT		 303}
304
305void ufs_panic (struct super_block * sb, const char * function,
306 const char * fmt, ...)
307{
308 struct ufs_sb_private_info * uspi;
309 struct ufs_super_block_first * usb1;
7e1e4167 310 struct va_format vaf;
1da177e4
LT		 311 va_list args;
312
313 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 314 usb1 = ubh_get_usb_first(uspi);
1da177e4 315
bc98a42c 316 if (!sb_rdonly(sb)) {
1da177e4 317 usb1->fs_clean = UFS_FSBAD;
9695ef16 318 ubh_mark_buffer_dirty(USPI_UBH(uspi));
9e9ad5f4 319 ufs_mark_sb_dirty(sb);
1da177e4 320 }
7e1e4167
FF		 321 va_start(args, fmt);
322 vaf.fmt = fmt;
323 vaf.va = &args;
1751e8a6 324 sb->s_flags |= SB_RDONLY;
7e1e4167
FF		 325 pr_crit("panic (device %s): %s: %pV\n",
326 sb->s_id, function, &vaf);
327 va_end(args);
1da177e4
LT		 328}
329
330void ufs_warning (struct super_block * sb, const char * function,
331 const char * fmt, ...)
332{
7e1e4167 333 struct va_format vaf;
1da177e4
LT		 334 va_list args;
335
7e1e4167
FF		 336 va_start(args, fmt);
337 vaf.fmt = fmt;
338 vaf.va = &args;
339 pr_warn("(device %s): %s: %pV\n",
340 sb->s_id, function, &vaf);
341 va_end(args);
1da177e4
LT		 342}
343
344enum {
2a9807c0
ED		 345 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
346 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
347 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
348 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
349 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
350 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
351 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
352 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
353 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
354 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
355 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
356 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
357 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
358 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
359 Opt_err
1da177e4
LT		 360};
361
a447c093 362static const match_table_t tokens = {
1da177e4
LT		 363 {Opt_type_old, "ufstype=old"},
364 {Opt_type_sunx86, "ufstype=sunx86"},
365 {Opt_type_sun, "ufstype=sun"},
252e211e 366 {Opt_type_sunos, "ufstype=sunos"},
1da177e4
LT		 367 {Opt_type_44bsd, "ufstype=44bsd"},
368 {Opt_type_ufs2, "ufstype=ufs2"},
369 {Opt_type_ufs2, "ufstype=5xbsd"},
370 {Opt_type_hp, "ufstype=hp"},
371 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
372 {Opt_type_nextstep, "ufstype=nextstep"},
373 {Opt_type_openstep, "ufstype=openstep"},
2a9807c0 374/*end of possible ufs types */
1da177e4
LT		 375 {Opt_onerror_panic, "onerror=panic"},
376 {Opt_onerror_lock, "onerror=lock"},
377 {Opt_onerror_umount, "onerror=umount"},
378 {Opt_onerror_repair, "onerror=repair"},
379 {Opt_err, NULL}
380};
381
382static int ufs_parse_options (char * options, unsigned * mount_options)
383{
384 char * p;
385
abf5d15f 386 UFSD("ENTER\n");
1da177e4
LT		 387
388 if (!options)
389 return 1;
390
391 while ((p = strsep(&options, ",")) != NULL) {
392 substring_t args[MAX_OPT_ARGS];
393 int token;
394 if (!*p)
395 continue;
396
397 token = match_token(p, tokens, args);
398 switch (token) {
399 case Opt_type_old:
400 ufs_clear_opt (*mount_options, UFSTYPE);
401 ufs_set_opt (*mount_options, UFSTYPE_OLD);
402 break;
403 case Opt_type_sunx86:
404 ufs_clear_opt (*mount_options, UFSTYPE);
405 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
406 break;
407 case Opt_type_sun:
408 ufs_clear_opt (*mount_options, UFSTYPE);
409 ufs_set_opt (*mount_options, UFSTYPE_SUN);
410 break;
252e211e
MF		 411 case Opt_type_sunos:
412 ufs_clear_opt(*mount_options, UFSTYPE);
413 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
414 break;
1da177e4
LT		 415 case Opt_type_44bsd:
416 ufs_clear_opt (*mount_options, UFSTYPE);
417 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
418 break;
419 case Opt_type_ufs2:
420 ufs_clear_opt(*mount_options, UFSTYPE);
421 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
422 break;
423 case Opt_type_hp:
424 ufs_clear_opt (*mount_options, UFSTYPE);
425 ufs_set_opt (*mount_options, UFSTYPE_HP);
426 break;
427 case Opt_type_nextstepcd:
428 ufs_clear_opt (*mount_options, UFSTYPE);
429 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
430 break;
431 case Opt_type_nextstep:
432 ufs_clear_opt (*mount_options, UFSTYPE);
433 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
434 break;
435 case Opt_type_openstep:
436 ufs_clear_opt (*mount_options, UFSTYPE);
437 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
438 break;
439 case Opt_onerror_panic:
440 ufs_clear_opt (*mount_options, ONERROR);
441 ufs_set_opt (*mount_options, ONERROR_PANIC);
442 break;
443 case Opt_onerror_lock:
444 ufs_clear_opt (*mount_options, ONERROR);
445 ufs_set_opt (*mount_options, ONERROR_LOCK);
446 break;
447 case Opt_onerror_umount:
448 ufs_clear_opt (*mount_options, ONERROR);
449 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
450 break;
451 case Opt_onerror_repair:
de771bda 452 pr_err("Unable to do repair on error, will lock lock instead\n");
1da177e4
LT		 453 ufs_clear_opt (*mount_options, ONERROR);
454 ufs_set_opt (*mount_options, ONERROR_REPAIR);
455 break;
456 default:
de771bda 457 pr_err("Invalid option: \"%s\" or missing value\n", p);
1da177e4
LT		 458 return 0;
459 }
460 }
461 return 1;
462}
463
464/*
25985edc
LDM		 465 * Different types of UFS hold fs_cstotal in different
466 * places, and use different data structure for it.
467 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
1da177e4 468 */
ee3ffd6c 469static void ufs_setup_cstotal(struct super_block *sb)
e295cfcb 470{
647b7e87
ED		 471 struct ufs_sb_info *sbi = UFS_SB(sb);
472 struct ufs_sb_private_info *uspi = sbi->s_uspi;
ee3ffd6c
ED		 473 struct ufs_super_block_first *usb1;
474 struct ufs_super_block_second *usb2;
647b7e87 475 struct ufs_super_block_third *usb3;
ee3ffd6c
ED		 476 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
477
478 UFSD("ENTER, mtype=%u\n", mtype);
479 usb1 = ubh_get_usb_first(uspi);
480 usb2 = ubh_get_usb_second(uspi);
481 usb3 = ubh_get_usb_third(uspi);
482
483 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
96ecff14 484 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
ee3ffd6c
ED		 485 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
486 /*we have statistic in different place, then usual*/
487 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
488 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
489 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
490 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
491 } else {
492 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
493 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
494 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
495 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
496 }
497 UFSD("EXIT\n");
498}
499
500/*
501 * Read on-disk structures associated with cylinder groups
502 */
503static int ufs_read_cylinder_structures(struct super_block *sb)
504{
505 struct ufs_sb_info *sbi = UFS_SB(sb);
506 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 507 struct ufs_buffer_head * ubh;
508 unsigned char * base, * space;
509 unsigned size, blks, i;
ee3ffd6c 510
abf5d15f 511 UFSD("ENTER\n");
1da177e4 512
1da177e4
LT		 513 /*
514 * Read cs structures from (usually) first data block
515 * on the device.
516 */
517 size = uspi->s_cssize;
518 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
788257d6 519 base = space = kmalloc(size, GFP_NOFS);
1da177e4
LT		 520 if (!base)
521 goto failed;
e295cfcb 522 sbi->s_csp = (struct ufs_csum *)space;
1da177e4
LT		 523 for (i = 0; i < blks; i += uspi->s_fpb) {
524 size = uspi->s_bsize;
525 if (i + uspi->s_fpb > blks)
526 size = (blks - i) * uspi->s_fsize;
527
3313e292 528 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
7b4ee73e
E		 529
530 if (!ubh)
531 goto failed;
532
533 ubh_ubhcpymem (space, ubh, size);
7b4ee73e 534
1da177e4
LT		 535 space += size;
536 ubh_brelse (ubh);
537 ubh = NULL;
538 }
539
540 /*
541 * Read cylinder group (we read only first fragment from block
542 * at this time) and prepare internal data structures for cg caching.
543 */
6da2ec56
KC		 544 sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
545 GFP_NOFS);
546 if (!sbi->s_ucg)
1da177e4
LT		 547 goto failed;
548 for (i = 0; i < uspi->s_ncg; i++)
549 sbi->s_ucg[i] = NULL;
550 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
551 sbi->s_ucpi[i] = NULL;
552 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
553 }
554 for (i = 0; i < uspi->s_ncg; i++) {
abf5d15f 555 UFSD("read cg %u\n", i);
1da177e4
LT		 556 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
557 goto failed;
558 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
559 goto failed;
647b7e87 560
1da177e4 561 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
1da177e4
LT		 562 }
563 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
788257d6 564 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
1da177e4
LT		 565 goto failed;
566 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
567 }
568 sbi->s_cg_loaded = 0;
abf5d15f 569 UFSD("EXIT\n");
1da177e4
LT		 570 return 1;
571
572failed:
f99d49ad 573 kfree (base);
1da177e4
LT		 574 if (sbi->s_ucg) {
575 for (i = 0; i < uspi->s_ncg; i++)
f99d49ad
JJ		 576 if (sbi->s_ucg[i])
577 brelse (sbi->s_ucg[i]);
1da177e4
LT		 578 kfree (sbi->s_ucg);
579 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
f99d49ad 580 kfree (sbi->s_ucpi[i]);
1da177e4 581 }
abf5d15f 582 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 583 return 0;
584}
585
586/*
ee3ffd6c 587 * Sync our internal copy of fs_cstotal with disk
1da177e4 588 */
ee3ffd6c 589static void ufs_put_cstotal(struct super_block *sb)
e295cfcb 590{
ee3ffd6c
ED		 591 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
592 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
593 struct ufs_super_block_first *usb1;
594 struct ufs_super_block_second *usb2;
595 struct ufs_super_block_third *usb3;
596
597 UFSD("ENTER\n");
598 usb1 = ubh_get_usb_first(uspi);
599 usb2 = ubh_get_usb_second(uspi);
600 usb3 = ubh_get_usb_third(uspi);
601
96ecff14 602 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
ee3ffd6c
ED		 603 /*we have statistic in different place, then usual*/
604 usb2->fs_un.fs_u2.cs_ndir =
605 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
606 usb2->fs_un.fs_u2.cs_nbfree =
607 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
608 usb3->fs_un1.fs_u2.cs_nifree =
609 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
610 usb3->fs_un1.fs_u2.cs_nffree =
611 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
96ecff14 612 goto out;
ee3ffd6c 613 }
96ecff14
AV		 614
615 if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
616 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
617 /* store stats in both old and new places */
618 usb2->fs_un.fs_u2.cs_ndir =
619 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
620 usb2->fs_un.fs_u2.cs_nbfree =
621 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
622 usb3->fs_un1.fs_u2.cs_nifree =
623 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
624 usb3->fs_un1.fs_u2.cs_nffree =
625 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
ee3ffd6c 626 }
96ecff14
AV		 627 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
628 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
629 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
630 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
631out:
ee3ffd6c 632 ubh_mark_buffer_dirty(USPI_UBH(uspi));
3313e292 633 ufs_print_super_stuff(sb, usb1, usb2, usb3);
ee3ffd6c
ED		 634 UFSD("EXIT\n");
635}
636
637/**
638 * ufs_put_super_internal() - put on-disk intrenal structures
639 * @sb: pointer to super_block structure
640 * Put on-disk structures associated with cylinder groups
641 * and write them back to disk, also update cs_total on disk
642 */
643static void ufs_put_super_internal(struct super_block *sb)
644{
645 struct ufs_sb_info *sbi = UFS_SB(sb);
646 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 647 struct ufs_buffer_head * ubh;
648 unsigned char * base, * space;
649 unsigned blks, size, i;
ee3ffd6c 650
1da177e4 651
abf5d15f 652 UFSD("ENTER\n");
6cfd0148 653
ee3ffd6c 654 ufs_put_cstotal(sb);
1da177e4
LT		 655 size = uspi->s_cssize;
656 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
e295cfcb 657 base = space = (char*) sbi->s_csp;
1da177e4
LT		 658 for (i = 0; i < blks; i += uspi->s_fpb) {
659 size = uspi->s_bsize;
660 if (i + uspi->s_fpb > blks)
661 size = (blks - i) * uspi->s_fsize;
3313e292 662
1da177e4 663 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
3313e292 664
1da177e4
LT		 665 ubh_memcpyubh (ubh, space, size);
666 space += size;
667 ubh_mark_buffer_uptodate (ubh, 1);
668 ubh_mark_buffer_dirty (ubh);
669 ubh_brelse (ubh);
670 }
671 for (i = 0; i < sbi->s_cg_loaded; i++) {
672 ufs_put_cylinder (sb, i);
673 kfree (sbi->s_ucpi[i]);
674 }
675 for (; i < UFS_MAX_GROUP_LOADED; i++)
676 kfree (sbi->s_ucpi[i]);
677 for (i = 0; i < uspi->s_ncg; i++)
678 brelse (sbi->s_ucg[i]);
679 kfree (sbi->s_ucg);
680 kfree (base);
6cfd0148 681
abf5d15f 682 UFSD("EXIT\n");
1da177e4
LT		 683}
684
7bd54ef7
AB		 685static int ufs_sync_fs(struct super_block *sb, int wait)
686{
687 struct ufs_sb_private_info * uspi;
688 struct ufs_super_block_first * usb1;
689 struct ufs_super_block_third * usb3;
690 unsigned flags;
691
cdd9eefd 692 mutex_lock(&UFS_SB(sb)->s_lock);
7bd54ef7
AB		 693
694 UFSD("ENTER\n");
695
696 flags = UFS_SB(sb)->s_flags;
697 uspi = UFS_SB(sb)->s_uspi;
698 usb1 = ubh_get_usb_first(uspi);
699 usb3 = ubh_get_usb_third(uspi);
700
a3fda0ff 701 usb1->fs_time = ufs_get_seconds(sb);
7bd54ef7
AB		 702 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
703 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
704 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
705 ufs_set_fs_state(sb, usb1, usb3,
706 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
707 ufs_put_cstotal(sb);
7bd54ef7
AB		 708
709 UFSD("EXIT\n");
cdd9eefd 710 mutex_unlock(&UFS_SB(sb)->s_lock);
7bd54ef7
AB		 711
712 return 0;
713}
714
9e9ad5f4 715static void delayed_sync_fs(struct work_struct *work)
7bd54ef7 716{
9e9ad5f4
AB		 717 struct ufs_sb_info *sbi;
718
719 sbi = container_of(work, struct ufs_sb_info, sync_work.work);
720
721 spin_lock(&sbi->work_lock);
722 sbi->work_queued = 0;
723 spin_unlock(&sbi->work_lock);
724
725 ufs_sync_fs(sbi->sb, 1);
726}
727
728void ufs_mark_sb_dirty(struct super_block *sb)
729{
730 struct ufs_sb_info *sbi = UFS_SB(sb);
731 unsigned long delay;
732
733 spin_lock(&sbi->work_lock);
734 if (!sbi->work_queued) {
735 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
736 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
737 sbi->work_queued = 1;
738 }
739 spin_unlock(&sbi->work_lock);
7bd54ef7
AB		 740}
741
742static void ufs_put_super(struct super_block *sb)
743{
744 struct ufs_sb_info * sbi = UFS_SB(sb);
745
746 UFSD("ENTER\n");
747
bc98a42c 748 if (!sb_rdonly(sb))
7bd54ef7 749 ufs_put_super_internal(sb);
9e9ad5f4 750 cancel_delayed_work_sync(&sbi->sync_work);
7bd54ef7
AB		 751
752 ubh_brelse_uspi (sbi->s_uspi);
753 kfree (sbi->s_uspi);
754 kfree (sbi);
755 sb->s_fs_info = NULL;
756 UFSD("EXIT\n");
757 return;
758}
759
6b0d144f
AV		 760static u64 ufs_max_bytes(struct super_block *sb)
761{
762 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
763 int bits = uspi->s_apbshift;
764 u64 res;
765
766 if (bits > 21)
767 res = ~0ULL;
768 else
769 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
770 (1LL << (3*bits));
771
772 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
773 return MAX_LFS_FILESIZE;
774 return res << uspi->s_bshift;
775}
776
1da177e4
LT		 777static int ufs_fill_super(struct super_block *sb, void *data, int silent)
778{
779 struct ufs_sb_info * sbi;
780 struct ufs_sb_private_info * uspi;
781 struct ufs_super_block_first * usb1;
782 struct ufs_super_block_second * usb2;
783 struct ufs_super_block_third * usb3;
1da177e4
LT		 784 struct ufs_buffer_head * ubh;
785 struct inode *inode;
786 unsigned block_size, super_block_size;
787 unsigned flags;
7b4ee73e 788 unsigned super_block_offset;
9e6766cc 789 unsigned maxsymlen;
b55c460d 790 int ret = -EINVAL;
1da177e4
LT		 791
792 uspi = NULL;
793 ubh = NULL;
794 flags = 0;
795
abf5d15f 796 UFSD("ENTER\n");
0244756e
FF		 797
798#ifndef CONFIG_UFS_FS_WRITE
bc98a42c 799 if (!sb_rdonly(sb)) {
a9814c5d 800 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
0244756e
FF		 801 return -EROFS;
802 }
803#endif
1da177e4 804
f8314dc6 805 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
1da177e4
LT		 806 if (!sbi)
807 goto failed_nomem;
808 sb->s_fs_info = sbi;
9e9ad5f4 809 sbi->sb = sb;
1da177e4 810
bc98a42c 811 UFSD("flag %u\n", (int)(sb_rdonly(sb)));
1da177e4 812
e4f95517 813 mutex_init(&sbi->s_lock);
9e9ad5f4
AB		 814 spin_lock_init(&sbi->work_lock);
815 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
1da177e4
LT		 816 /*
817 * Set default mount options
818 * Parse mount options
819 */
820 sbi->s_mount_opt = 0;
821 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
822 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
a9814c5d 823 pr_err("wrong mount options\n");
1da177e4
LT		 824 goto failed;
825 }
826 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
827 if (!silent)
a9814c5d 828 pr_err("You didn't specify the type of your ufs filesystem\n\n"
1da177e4 829 "mount -t ufs -o ufstype="
c690a722 830 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
1da177e4
LT		 831 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
832 "default is ufstype=old\n");
833 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
834 }
835
252e211e
MF		 836 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
837 sbi->s_uspi = uspi;
1da177e4
LT		 838 if (!uspi)
839 goto failed;
f336953b 840 uspi->s_dirblksize = UFS_SECTOR_SIZE;
7b4ee73e
E		 841 super_block_offset=UFS_SBLOCK;
842
239e250e
RN		 843 sb->s_maxbytes = MAX_LFS_FILESIZE;
844
22b13969
DD		 845 sb->s_time_gran = NSEC_PER_SEC;
846 sb->s_time_min = S32_MIN;
847 sb->s_time_max = S32_MAX;
848
1da177e4
LT		 849 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
850 case UFS_MOUNT_UFSTYPE_44BSD:
abf5d15f 851 UFSD("ufstype=44bsd\n");
1da177e4
LT		 852 uspi->s_fsize = block_size = 512;
853 uspi->s_fmask = ~(512 - 1);
854 uspi->s_fshift = 9;
855 uspi->s_sbsize = super_block_size = 1536;
856 uspi->s_sbbase = 0;
857 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
858 break;
859 case UFS_MOUNT_UFSTYPE_UFS2:
abf5d15f 860 UFSD("ufstype=ufs2\n");
7b4ee73e 861 super_block_offset=SBLOCK_UFS2;
1da177e4
LT		 862 uspi->s_fsize = block_size = 512;
863 uspi->s_fmask = ~(512 - 1);
864 uspi->s_fshift = 9;
865 uspi->s_sbsize = super_block_size = 1536;
866 uspi->s_sbbase = 0;
22b13969
DD		 867 sb->s_time_gran = 1;
868 sb->s_time_min = S64_MIN;
869 sb->s_time_max = S64_MAX;
1da177e4 870 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
1da177e4
LT		 871 break;
872
873 case UFS_MOUNT_UFSTYPE_SUN:
abf5d15f 874 UFSD("ufstype=sun\n");
1da177e4
LT		 875 uspi->s_fsize = block_size = 1024;
876 uspi->s_fmask = ~(1024 - 1);
877 uspi->s_fshift = 10;
878 uspi->s_sbsize = super_block_size = 2048;
879 uspi->s_sbbase = 0;
252e211e 880 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 881 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
882 break;
883
252e211e 884 case UFS_MOUNT_UFSTYPE_SUNOS:
d4beaabd 885 UFSD("ufstype=sunos\n");
252e211e
MF		 886 uspi->s_fsize = block_size = 1024;
887 uspi->s_fmask = ~(1024 - 1);
888 uspi->s_fshift = 10;
889 uspi->s_sbsize = 2048;
890 super_block_size = 2048;
891 uspi->s_sbbase = 0;
892 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
893 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
894 break;
895
1da177e4 896 case UFS_MOUNT_UFSTYPE_SUNx86:
abf5d15f 897 UFSD("ufstype=sunx86\n");
1da177e4
LT		 898 uspi->s_fsize = block_size = 1024;
899 uspi->s_fmask = ~(1024 - 1);
900 uspi->s_fshift = 10;
901 uspi->s_sbsize = super_block_size = 2048;
902 uspi->s_sbbase = 0;
252e211e 903 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 904 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
905 break;
906
907 case UFS_MOUNT_UFSTYPE_OLD:
abf5d15f 908 UFSD("ufstype=old\n");
1da177e4
LT		 909 uspi->s_fsize = block_size = 1024;
910 uspi->s_fmask = ~(1024 - 1);
911 uspi->s_fshift = 10;
912 uspi->s_sbsize = super_block_size = 2048;
913 uspi->s_sbbase = 0;
914 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
bc98a42c 915 if (!sb_rdonly(sb)) {
1da177e4 916 if (!silent)
a9814c5d 917 pr_info("ufstype=old is supported read-only\n");
1751e8a6 918 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 919 }
920 break;
921
922 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
abf5d15f 923 UFSD("ufstype=nextstep\n");
1da177e4
LT		 924 uspi->s_fsize = block_size = 1024;
925 uspi->s_fmask = ~(1024 - 1);
926 uspi->s_fshift = 10;
927 uspi->s_sbsize = super_block_size = 2048;
928 uspi->s_sbbase = 0;
0c664f97 929 uspi->s_dirblksize = 1024;
1da177e4 930 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
bc98a42c 931 if (!sb_rdonly(sb)) {
1da177e4 932 if (!silent)
a9814c5d 933 pr_info("ufstype=nextstep is supported read-only\n");
1751e8a6 934 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 935 }
936 break;
937
938 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
abf5d15f 939 UFSD("ufstype=nextstep-cd\n");
1da177e4
LT		 940 uspi->s_fsize = block_size = 2048;
941 uspi->s_fmask = ~(2048 - 1);
942 uspi->s_fshift = 11;
943 uspi->s_sbsize = super_block_size = 2048;
944 uspi->s_sbbase = 0;
0c664f97 945 uspi->s_dirblksize = 1024;
1da177e4 946 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
bc98a42c 947 if (!sb_rdonly(sb)) {
1da177e4 948 if (!silent)
a9814c5d 949 pr_info("ufstype=nextstep-cd is supported read-only\n");
1751e8a6 950 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 951 }
952 break;
953
954 case UFS_MOUNT_UFSTYPE_OPENSTEP:
abf5d15f 955 UFSD("ufstype=openstep\n");
1da177e4
LT		 956 uspi->s_fsize = block_size = 1024;
957 uspi->s_fmask = ~(1024 - 1);
958 uspi->s_fshift = 10;
959 uspi->s_sbsize = super_block_size = 2048;
960 uspi->s_sbbase = 0;
f336953b 961 uspi->s_dirblksize = 1024;
1da177e4 962 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
bc98a42c 963 if (!sb_rdonly(sb)) {
1da177e4 964 if (!silent)
a9814c5d 965 pr_info("ufstype=openstep is supported read-only\n");
1751e8a6 966 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 967 }
968 break;
969
970 case UFS_MOUNT_UFSTYPE_HP:
abf5d15f 971 UFSD("ufstype=hp\n");
1da177e4
LT		 972 uspi->s_fsize = block_size = 1024;
973 uspi->s_fmask = ~(1024 - 1);
974 uspi->s_fshift = 10;
975 uspi->s_sbsize = super_block_size = 2048;
976 uspi->s_sbbase = 0;
977 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
bc98a42c 978 if (!sb_rdonly(sb)) {
1da177e4 979 if (!silent)
a9814c5d 980 pr_info("ufstype=hp is supported read-only\n");
1751e8a6 981 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 982 }
983 break;
984 default:
985 if (!silent)
a9814c5d 986 pr_err("unknown ufstype\n");
1da177e4
LT		 987 goto failed;
988 }
989
990again:
991 if (!sb_set_blocksize(sb, block_size)) {
de771bda 992 pr_err("failed to set blocksize\n");
1da177e4
LT		 993 goto failed;
994 }
995
996 /*
997 * read ufs super block from device
998 */
7b4ee73e
E		 999
1000 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1001
1da177e4
LT		 1002 if (!ubh)
1003 goto failed;
1004
7b4ee73e
E		 1005 usb1 = ubh_get_usb_first(uspi);
1006 usb2 = ubh_get_usb_second(uspi);
1007 usb3 = ubh_get_usb_third(uspi);
1da177e4 1008
252e211e
MF		 1009 /* Sort out mod used on SunOS 4.1.3 for fs_state */
1010 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1011 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1012 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1013 flags &= ~UFS_ST_MASK;
1014 flags |= UFS_ST_SUN;
1015 }
1016
96ecff14
AV		 1017 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1018 uspi->s_postblformat == UFS_42POSTBLFMT) {
1019 if (!silent)
1020 pr_err("this is not a 44bsd filesystem");
1021 goto failed;
1022 }
1023
1da177e4
LT		 1024 /*
1025 * Check ufs magic number
1026 */
1027 sbi->s_bytesex = BYTESEX_LE;
1028 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029 case UFS_MAGIC:
d27d7a9a 1030 case UFS_MAGIC_BW:
1da177e4
LT		 1031 case UFS2_MAGIC:
1032 case UFS_MAGIC_LFN:
1033 case UFS_MAGIC_FEA:
1034 case UFS_MAGIC_4GB:
1035 goto magic_found;
1036 }
1037 sbi->s_bytesex = BYTESEX_BE;
1038 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1039 case UFS_MAGIC:
d27d7a9a 1040 case UFS_MAGIC_BW:
1da177e4
LT		 1041 case UFS2_MAGIC:
1042 case UFS_MAGIC_LFN:
1043 case UFS_MAGIC_FEA:
1044 case UFS_MAGIC_4GB:
1045 goto magic_found;
1046 }
1047
1048 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1049 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1050 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1051 && uspi->s_sbbase < 256) {
1052 ubh_brelse_uspi(uspi);
1053 ubh = NULL;
1054 uspi->s_sbbase += 8;
1055 goto again;
1056 }
1057 if (!silent)
07bc94fd 1058 pr_err("%s(): bad magic number\n", __func__);
1da177e4
LT		 1059 goto failed;
1060
1061magic_found:
1062 /*
1063 * Check block and fragment sizes
1064 */
1065 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1066 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1067 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1068 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1069 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1070
9e8c4273 1071 if (!is_power_of_2(uspi->s_fsize)) {
07bc94fd
FF		 1072 pr_err("%s(): fragment size %u is not a power of 2\n",
1073 __func__, uspi->s_fsize);
a9814c5d 1074 goto failed;
1da177e4
LT		 1075 }
1076 if (uspi->s_fsize < 512) {
07bc94fd
FF		 1077 pr_err("%s(): fragment size %u is too small\n",
1078 __func__, uspi->s_fsize);
1da177e4
LT		 1079 goto failed;
1080 }
1081 if (uspi->s_fsize > 4096) {
07bc94fd
FF		 1082 pr_err("%s(): fragment size %u is too large\n",
1083 __func__, uspi->s_fsize);
1da177e4
LT		 1084 goto failed;
1085 }
9e8c4273 1086 if (!is_power_of_2(uspi->s_bsize)) {
07bc94fd
FF		 1087 pr_err("%s(): block size %u is not a power of 2\n",
1088 __func__, uspi->s_bsize);
1da177e4
LT		 1089 goto failed;
1090 }
1091 if (uspi->s_bsize < 4096) {
07bc94fd
FF		 1092 pr_err("%s(): block size %u is too small\n",
1093 __func__, uspi->s_bsize);
1da177e4
LT		 1094 goto failed;
1095 }
1096 if (uspi->s_bsize / uspi->s_fsize > 8) {
07bc94fd
FF		 1097 pr_err("%s(): too many fragments per block (%u)\n",
1098 __func__, uspi->s_bsize / uspi->s_fsize);
1da177e4
LT		 1099 goto failed;
1100 }
1101 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1102 ubh_brelse_uspi(uspi);
1103 ubh = NULL;
1104 block_size = uspi->s_fsize;
1105 super_block_size = uspi->s_sbsize;
abf5d15f 1106 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1da177e4
LT		 1107 goto again;
1108 }
1109
f664f1f9 1110 sbi->s_flags = flags;/*after that line some functions use s_flags*/
3313e292 1111 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1da177e4
LT		 1112
1113 /*
1114 * Check, if file system was correctly unmounted.
1115 * If not, make it read only.
1116 */
f664f1f9
AM		 1117 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1118 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1119 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1120 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1121 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1122 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1da177e4
LT		 1123 switch(usb1->fs_clean) {
1124 case UFS_FSCLEAN:
abf5d15f 1125 UFSD("fs is clean\n");
1da177e4
LT		 1126 break;
1127 case UFS_FSSTABLE:
abf5d15f 1128 UFSD("fs is stable\n");
b3a0fd4d
AV		 1129 break;
1130 case UFS_FSLOG:
1131 UFSD("fs is logging fs\n");
1da177e4
LT		 1132 break;
1133 case UFS_FSOSF1:
abf5d15f 1134 UFSD("fs is DEC OSF/1\n");
1da177e4
LT		 1135 break;
1136 case UFS_FSACTIVE:
07bc94fd 1137 pr_err("%s(): fs is active\n", __func__);
1751e8a6 1138 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 1139 break;
1140 case UFS_FSBAD:
07bc94fd 1141 pr_err("%s(): fs is bad\n", __func__);
1751e8a6 1142 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 1143 break;
1144 default:
07bc94fd
FF		 1145 pr_err("%s(): can't grok fs_clean 0x%x\n",
1146 __func__, usb1->fs_clean);
1751e8a6 1147 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 1148 break;
1149 }
ee3ffd6c 1150 } else {
07bc94fd 1151 pr_err("%s(): fs needs fsck\n", __func__);
1751e8a6 1152 sb->s_flags |= SB_RDONLY;
1da177e4
LT		 1153 }
1154
1155 /*
1156 * Read ufs_super_block into internal data structures
1157 */
1158 sb->s_op = &ufs_super_ops;
f3e2a520 1159 sb->s_export_op = &ufs_export_ops;
123e9caf 1160
1da177e4
LT		 1161 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1162
1163 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1164 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1165 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1166 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1167 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1168 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1169
1170 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
c596961d
AV		 1171 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1172 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
647b7e87 1173 } else {
1da177e4
LT		 1174 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1175 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1176 }
1177
1178 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1179 /* s_bsize already set */
1180 /* s_fsize already set */
1181 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1182 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1183 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1184 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1185 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1186 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
abf5d15f
ED		 1187 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1188 uspi->s_fshift);
1da177e4
LT		 1189 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1190 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1191 /* s_sbsize already set */
1192 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1193 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1194 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1195 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1196 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1197 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1198 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1199 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
3313e292
ED		 1200
1201 if (uspi->fs_magic == UFS2_MAGIC)
1202 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1203 else
1204 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1205
1da177e4
LT		 1206 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1207 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1208 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1209 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1210 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1211 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1212 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
647b7e87
ED		 1213 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1214 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1da177e4
LT		 1215 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1216 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1da177e4
LT		 1217 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1218 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1219 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1220
c596961d
AV		 1221 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1222 uspi->s_minfree, 100);
77e9ce32
AV		 1223 if (uspi->s_minfree <= 5) {
1224 uspi->s_time_to_space = ~0ULL;
1225 uspi->s_space_to_time = 0;
1226 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1227 } else {
1228 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1229 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1230 uspi->s_minfree - 2, 100) - 1;
1231 }
c596961d 1232
1da177e4
LT		 1233 /*
1234 * Compute another frequently used values
1235 */
1236 uspi->s_fpbmask = uspi->s_fpb - 1;
abf5d15f 1237 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 1238 uspi->s_apbshift = uspi->s_bshift - 3;
abf5d15f 1239 else
1da177e4 1240 uspi->s_apbshift = uspi->s_bshift - 2;
abf5d15f 1241
1da177e4
LT		 1242 uspi->s_2apbshift = uspi->s_apbshift * 2;
1243 uspi->s_3apbshift = uspi->s_apbshift * 3;
1244 uspi->s_apb = 1 << uspi->s_apbshift;
1245 uspi->s_2apb = 1 << uspi->s_2apbshift;
1246 uspi->s_3apb = 1 << uspi->s_3apbshift;
1247 uspi->s_apbmask = uspi->s_apb - 1;
1248 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1249 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1250 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1251 uspi->s_bpf = uspi->s_fsize << 3;
1252 uspi->s_bpfshift = uspi->s_fshift + 3;
1253 uspi->s_bpfmask = uspi->s_bpf - 1;
90b315af
ED		 1254 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1255 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1da177e4 1256 uspi->s_maxsymlinklen =
647b7e87 1257 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1da177e4 1258
9e6766cc
DG		 1259 if (uspi->fs_magic == UFS2_MAGIC)
1260 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1261 else
1262 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1263 if (uspi->s_maxsymlinklen > maxsymlen) {
1264 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1265 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1266 uspi->s_maxsymlinklen = maxsymlen;
1267 }
6b0d144f 1268 sb->s_maxbytes = ufs_max_bytes(sb);
8de52778 1269 sb->s_max_links = UFS_LINK_MAX;
9e6766cc 1270
b55c460d
DH		 1271 inode = ufs_iget(sb, UFS_ROOTINO);
1272 if (IS_ERR(inode)) {
1273 ret = PTR_ERR(inode);
1da177e4 1274 goto failed;
b55c460d 1275 }
48fde701 1276 sb->s_root = d_make_root(inode);
b55c460d
DH		 1277 if (!sb->s_root) {
1278 ret = -ENOMEM;
48fde701 1279 goto failed;
b55c460d 1280 }
1da177e4 1281
ee3ffd6c 1282 ufs_setup_cstotal(sb);
1da177e4
LT		 1283 /*
1284 * Read cylinder group structures
1285 */
bc98a42c 1286 if (!sb_rdonly(sb))
1da177e4
LT		 1287 if (!ufs_read_cylinder_structures(sb))
1288 goto failed;
1289
abf5d15f 1290 UFSD("EXIT\n");
1da177e4
LT		 1291 return 0;
1292
1da177e4 1293failed:
f99d49ad
JJ		 1294 if (ubh)
1295 ubh_brelse_uspi (uspi);
1296 kfree (uspi);
1297 kfree(sbi);
1da177e4 1298 sb->s_fs_info = NULL;
abf5d15f 1299 UFSD("EXIT (FAILED)\n");
b55c460d 1300 return ret;
1da177e4
LT		 1301
1302failed_nomem:
abf5d15f 1303 UFSD("EXIT (NOMEM)\n");
1da177e4
LT		 1304 return -ENOMEM;
1305}
1306
1da177e4
LT		 1307static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1308{
1309 struct ufs_sb_private_info * uspi;
1310 struct ufs_super_block_first * usb1;
1311 struct ufs_super_block_third * usb3;
1312 unsigned new_mount_opt, ufstype;
1313 unsigned flags;
337eb00a 1314
02b9984d 1315 sync_filesystem(sb);
cdd9eefd 1316 mutex_lock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1317 uspi = UFS_SB(sb)->s_uspi;
1318 flags = UFS_SB(sb)->s_flags;
7b4ee73e
E		 1319 usb1 = ubh_get_usb_first(uspi);
1320 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1321
1322 /*
1323 * Allow the "check" option to be passed as a remount option.
1324 * It is not possible to change ufstype option during remount
1325 */
1326 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1327 new_mount_opt = 0;
1328 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
bbd6851a 1329 if (!ufs_parse_options (data, &new_mount_opt)) {
cdd9eefd 1330 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4 1331 return -EINVAL;
bbd6851a 1332 }
1da177e4
LT		 1333 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1334 new_mount_opt |= ufstype;
ee3ffd6c 1335 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
a9814c5d 1336 pr_err("ufstype can't be changed during remount\n");
cdd9eefd 1337 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1338 return -EINVAL;
1339 }
1340
1751e8a6 1341 if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1da177e4 1342 UFS_SB(sb)->s_mount_opt = new_mount_opt;
cdd9eefd 1343 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1344 return 0;
1345 }
1346
1347 /*
1348 * fs was mouted as rw, remounting ro
1349 */
1751e8a6 1350 if (*mount_flags & SB_RDONLY) {
ee3ffd6c 1351 ufs_put_super_internal(sb);
a3fda0ff 1352 usb1->fs_time = ufs_get_seconds(sb);
1da177e4 1353 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1354 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1355 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1356 ufs_set_fs_state(sb, usb1, usb3,
1357 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1358 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1751e8a6 1359 sb->s_flags |= SB_RDONLY;
ee3ffd6c 1360 } else {
1da177e4
LT		 1361 /*
1362 * fs was mounted as ro, remounting rw
1363 */
1da177e4 1364#ifndef CONFIG_UFS_FS_WRITE
a9814c5d 1365 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
cdd9eefd 1366 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1367 return -EINVAL;
1368#else
1369 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
252e211e 1370 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1da177e4 1371 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
cbcae39f
ED		 1372 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1373 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
a9814c5d 1374 pr_err("this ufstype is read-only supported\n");
cdd9eefd 1375 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1376 return -EINVAL;
1377 }
ee3ffd6c 1378 if (!ufs_read_cylinder_structures(sb)) {
a9814c5d 1379 pr_err("failed during remounting\n");
cdd9eefd 1380 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1381 return -EPERM;
1382 }
1751e8a6 1383 sb->s_flags &= ~SB_RDONLY;
1da177e4
LT		 1384#endif
1385 }
1386 UFS_SB(sb)->s_mount_opt = new_mount_opt;
cdd9eefd 1387 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1388 return 0;
1389}
1390
34c80b1d 1391static int ufs_show_options(struct seq_file *seq, struct dentry *root)
2a9807c0 1392{
34c80b1d 1393 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
2a9807c0 1394 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
a447c093 1395 const struct match_token *tp = tokens;
2a9807c0
ED		 1396
1397 while (tp->token != Opt_onerror_panic && tp->token != mval)
1398 ++tp;
1399 BUG_ON(tp->token == Opt_onerror_panic);
1400 seq_printf(seq, ",%s", tp->pattern);
1401
1402 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1403 while (tp->token != Opt_err && tp->token != mval)
1404 ++tp;
1405 BUG_ON(tp->token == Opt_err);
1406 seq_printf(seq, ",%s", tp->pattern);
1407
1408 return 0;
1409}
1410
647b7e87 1411static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1412{
726c3342 1413 struct super_block *sb = dentry->d_sb;
647b7e87
ED		 1414 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1415 unsigned flags = UFS_SB(sb)->s_flags;
41d577aa 1416 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1da177e4 1417
dff7cfd3 1418 mutex_lock(&UFS_SB(sb)->s_lock);
1da177e4 1419
c596961d 1420 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 1421 buf->f_type = UFS2_MAGIC;
c596961d 1422 else
1da177e4 1423 buf->f_type = UFS_MAGIC;
c596961d
AV		 1424
1425 buf->f_blocks = uspi->s_dsize;
1426 buf->f_bfree = ufs_freefrags(uspi);
ee3ffd6c 1427 buf->f_ffree = uspi->cs_total.cs_nifree;
1da177e4 1428 buf->f_bsize = sb->s_blocksize;
c596961d
AV		 1429 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1430 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1da177e4
LT		 1431 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1432 buf->f_namelen = UFS_MAXNAMLEN;
6d1349c7 1433 buf->f_fsid = u64_to_fsid(id);
1da177e4 1434
dff7cfd3 1435 mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4
LT		 1436
1437 return 0;
1438}
1439
e18b890b 1440static struct kmem_cache * ufs_inode_cachep;
1da177e4
LT		 1441
1442static struct inode *ufs_alloc_inode(struct super_block *sb)
1443{
1444 struct ufs_inode_info *ei;
61da3ae2 1445
fd60b288 1446 ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS);
1da177e4
LT		 1447 if (!ei)
1448 return NULL;
61da3ae2 1449
bb8c2d66 1450 inode_set_iversion(&ei->vfs_inode, 1);
724bb09f
AV		 1451 seqlock_init(&ei->meta_lock);
1452 mutex_init(&ei->truncate_mutex);
1da177e4
LT		 1453 return &ei->vfs_inode;
1454}
1455
98835e88 1456static void ufs_free_in_core_inode(struct inode *inode)
1da177e4
LT		 1457{
1458 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1459}
1460
51cc5068 1461static void init_once(void *foo)
1da177e4
LT		 1462{
1463 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1464
a35afb83 1465 inode_init_once(&ei->vfs_inode);
1da177e4 1466}
20c2df83 1467
76ee4735 1468static int __init init_inodecache(void)
1da177e4 1469{
df5f3cfc
DW		 1470 ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1471 sizeof(struct ufs_inode_info), 0,
1472 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1473 SLAB_ACCOUNT),
1474 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1475 sizeof_field(struct ufs_inode_info,
1476 i_u1.i_symlink),
1477 init_once);
1da177e4
LT		 1478 if (ufs_inode_cachep == NULL)
1479 return -ENOMEM;
1480 return 0;
1481}
1482
1483static void destroy_inodecache(void)
1484{
8c0a8537
KS		 1485 /*
1486 * Make sure all delayed rcu free inodes are flushed before we
1487 * destroy cache.
1488 */
1489 rcu_barrier();
1a1d92c1 1490 kmem_cache_destroy(ufs_inode_cachep);
1da177e4
LT		 1491}
1492
ee9b6d61 1493static const struct super_operations ufs_super_ops = {
1da177e4 1494 .alloc_inode = ufs_alloc_inode,
98835e88 1495 .free_inode = ufs_free_in_core_inode,
1da177e4 1496 .write_inode = ufs_write_inode,
58e8268c 1497 .evict_inode = ufs_evict_inode,
1da177e4 1498 .put_super = ufs_put_super,
8c800656 1499 .sync_fs = ufs_sync_fs,
1da177e4
LT		 1500 .statfs = ufs_statfs,
1501 .remount_fs = ufs_remount,
2a9807c0 1502 .show_options = ufs_show_options,
1da177e4
LT		 1503};
1504
152a0836
AV		 1505static struct dentry *ufs_mount(struct file_system_type *fs_type,
1506 int flags, const char *dev_name, void *data)
1da177e4 1507{
152a0836 1508 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1da177e4
LT		 1509}
1510
1511static struct file_system_type ufs_fs_type = {
1512 .owner = THIS_MODULE,
1513 .name = "ufs",
152a0836 1514 .mount = ufs_mount,
1da177e4
LT		 1515 .kill_sb = kill_block_super,
1516 .fs_flags = FS_REQUIRES_DEV,
1517};
7f78e035 1518MODULE_ALIAS_FS("ufs");
1da177e4
LT		 1519
1520static int __init init_ufs_fs(void)
1521{
1522 int err = init_inodecache();
1523 if (err)
1524 goto out1;
1525 err = register_filesystem(&ufs_fs_type);
1526 if (err)
1527 goto out;
1528 return 0;
1529out:
1530 destroy_inodecache();
1531out1:
1532 return err;
1533}
1534
1535static void __exit exit_ufs_fs(void)
1536{
1537 unregister_filesystem(&ufs_fs_type);
1538 destroy_inodecache();
1539}
1540
1541module_init(init_ufs_fs)
1542module_exit(exit_ufs_fs)
1543MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)