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Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
[deliverable/linux.git] / fs / ufs / super.c
1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gwingerde@gmail.com>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
66 */
67
68
69 #include <linux/exportfs.h>
70 #include <linux/module.h>
71 #include <linux/bitops.h>
72
73 #include <stdarg.h>
74
75 #include <asm/uaccess.h>
76
77 #include <linux/errno.h>
78 #include <linux/fs.h>
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>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/buffer_head.h>
87 #include <linux/vfs.h>
88 #include <linux/log2.h>
89 #include <linux/mount.h>
90 #include <linux/seq_file.h>
91
92 #include "ufs_fs.h"
93 #include "ufs.h"
94 #include "swab.h"
95 #include "util.h"
96
97 void lock_ufs(struct super_block *sb)
98 {
99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
100 struct ufs_sb_info *sbi = UFS_SB(sb);
101
102 mutex_lock(&sbi->mutex);
103 sbi->mutex_owner = current;
104 #endif
105 }
106
107 void unlock_ufs(struct super_block *sb)
108 {
109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
110 struct ufs_sb_info *sbi = UFS_SB(sb);
111
112 sbi->mutex_owner = NULL;
113 mutex_unlock(&sbi->mutex);
114 #endif
115 }
116
117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
118 {
119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
120 struct inode *inode;
121
122 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
123 return ERR_PTR(-ESTALE);
124
125 inode = ufs_iget(sb, ino);
126 if (IS_ERR(inode))
127 return ERR_CAST(inode);
128 if (generation && inode->i_generation != generation) {
129 iput(inode);
130 return ERR_PTR(-ESTALE);
131 }
132 return inode;
133 }
134
135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
136 int fh_len, int fh_type)
137 {
138 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
139 }
140
141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
142 int fh_len, int fh_type)
143 {
144 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
145 }
146
147 static struct dentry *ufs_get_parent(struct dentry *child)
148 {
149 struct qstr dot_dot = {
150 .name = "..",
151 .len = 2,
152 };
153 ino_t ino;
154
155 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
156 if (!ino)
157 return ERR_PTR(-ENOENT);
158 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
159 }
160
161 static const struct export_operations ufs_export_ops = {
162 .fh_to_dentry = ufs_fh_to_dentry,
163 .fh_to_parent = ufs_fh_to_parent,
164 .get_parent = ufs_get_parent,
165 };
166
167 #ifdef CONFIG_UFS_DEBUG
168 /*
169 * Print contents of ufs_super_block, useful for debugging
170 */
171 static void ufs_print_super_stuff(struct super_block *sb,
172 struct ufs_super_block_first *usb1,
173 struct ufs_super_block_second *usb2,
174 struct ufs_super_block_third *usb3)
175 {
176 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
177
178 printk("ufs_print_super_stuff\n");
179 printk(" magic: 0x%x\n", magic);
180 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
181 printk(" fs_size: %llu\n", (unsigned long long)
182 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
183 printk(" fs_dsize: %llu\n", (unsigned long long)
184 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
185 printk(" bsize: %u\n",
186 fs32_to_cpu(sb, usb1->fs_bsize));
187 printk(" fsize: %u\n",
188 fs32_to_cpu(sb, usb1->fs_fsize));
189 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
190 printk(" fs_sblockloc: %llu\n", (unsigned long long)
191 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
192 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
193 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
194 printk(" cs_nbfree(No of free blocks): %llu\n",
195 (unsigned long long)
196 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
197 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
198 (unsigned long long)
199 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
200 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
201 (unsigned long long)
202 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
203 printk(KERN_INFO" fs_maxsymlinklen: %u\n",
204 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
205 } else {
206 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
207 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
208 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
209 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
210 printk(" cgoffset: %u\n",
211 fs32_to_cpu(sb, usb1->fs_cgoffset));
212 printk(" ~cgmask: 0x%x\n",
213 ~fs32_to_cpu(sb, usb1->fs_cgmask));
214 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
215 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
216 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
217 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
218 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
219 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
220 printk(" fragshift: %u\n",
221 fs32_to_cpu(sb, usb1->fs_fragshift));
222 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
223 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
224 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
225 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
226 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
227 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
228 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
229 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
230 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
231 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
232 printk(" fstodb: %u\n",
233 fs32_to_cpu(sb, usb1->fs_fsbtodb));
234 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
235 printk(" ndir %u\n",
236 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
237 printk(" nifree %u\n",
238 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
239 printk(" nbfree %u\n",
240 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
241 printk(" nffree %u\n",
242 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
243 }
244 printk("\n");
245 }
246
247 /*
248 * Print contents of ufs_cylinder_group, useful for debugging
249 */
250 static void ufs_print_cylinder_stuff(struct super_block *sb,
251 struct ufs_cylinder_group *cg)
252 {
253 printk("\nufs_print_cylinder_stuff\n");
254 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
255 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
256 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
257 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
258 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
259 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
260 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
261 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
262 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
263 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
264 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
265 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
266 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
267 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
268 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
269 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
270 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
271 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
272 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
273 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
274 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
275 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
276 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
277 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
278 printk(" clustersumoff %u\n",
279 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
280 printk(" clusteroff %u\n",
281 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
282 printk(" nclusterblks %u\n",
283 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
284 printk("\n");
285 }
286 #else
287 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
288 # define ufs_print_cylinder_stuff(sb, cg) /**/
289 #endif /* CONFIG_UFS_DEBUG */
290
291 static const struct super_operations ufs_super_ops;
292
293 static char error_buf[1024];
294
295 void ufs_error (struct super_block * sb, const char * function,
296 const char * fmt, ...)
297 {
298 struct ufs_sb_private_info * uspi;
299 struct ufs_super_block_first * usb1;
300 va_list args;
301
302 uspi = UFS_SB(sb)->s_uspi;
303 usb1 = ubh_get_usb_first(uspi);
304
305 if (!(sb->s_flags & MS_RDONLY)) {
306 usb1->fs_clean = UFS_FSBAD;
307 ubh_mark_buffer_dirty(USPI_UBH(uspi));
308 sb->s_dirt = 1;
309 sb->s_flags |= MS_RDONLY;
310 }
311 va_start (args, fmt);
312 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
313 va_end (args);
314 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
315 case UFS_MOUNT_ONERROR_PANIC:
316 panic ("UFS-fs panic (device %s): %s: %s\n",
317 sb->s_id, function, error_buf);
318
319 case UFS_MOUNT_ONERROR_LOCK:
320 case UFS_MOUNT_ONERROR_UMOUNT:
321 case UFS_MOUNT_ONERROR_REPAIR:
322 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
323 sb->s_id, function, error_buf);
324 }
325 }
326
327 void ufs_panic (struct super_block * sb, const char * function,
328 const char * fmt, ...)
329 {
330 struct ufs_sb_private_info * uspi;
331 struct ufs_super_block_first * usb1;
332 va_list args;
333
334 uspi = UFS_SB(sb)->s_uspi;
335 usb1 = ubh_get_usb_first(uspi);
336
337 if (!(sb->s_flags & MS_RDONLY)) {
338 usb1->fs_clean = UFS_FSBAD;
339 ubh_mark_buffer_dirty(USPI_UBH(uspi));
340 sb->s_dirt = 1;
341 }
342 va_start (args, fmt);
343 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
344 va_end (args);
345 sb->s_flags |= MS_RDONLY;
346 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
347 sb->s_id, function, error_buf);
348 }
349
350 void ufs_warning (struct super_block * sb, const char * function,
351 const char * fmt, ...)
352 {
353 va_list args;
354
355 va_start (args, fmt);
356 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
357 va_end (args);
358 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
359 sb->s_id, function, error_buf);
360 }
361
362 enum {
363 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
364 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
365 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
366 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
367 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
368 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
369 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
370 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
371 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
372 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
373 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
374 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
375 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
376 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
377 Opt_err
378 };
379
380 static const match_table_t tokens = {
381 {Opt_type_old, "ufstype=old"},
382 {Opt_type_sunx86, "ufstype=sunx86"},
383 {Opt_type_sun, "ufstype=sun"},
384 {Opt_type_sunos, "ufstype=sunos"},
385 {Opt_type_44bsd, "ufstype=44bsd"},
386 {Opt_type_ufs2, "ufstype=ufs2"},
387 {Opt_type_ufs2, "ufstype=5xbsd"},
388 {Opt_type_hp, "ufstype=hp"},
389 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
390 {Opt_type_nextstep, "ufstype=nextstep"},
391 {Opt_type_openstep, "ufstype=openstep"},
392 /*end of possible ufs types */
393 {Opt_onerror_panic, "onerror=panic"},
394 {Opt_onerror_lock, "onerror=lock"},
395 {Opt_onerror_umount, "onerror=umount"},
396 {Opt_onerror_repair, "onerror=repair"},
397 {Opt_err, NULL}
398 };
399
400 static int ufs_parse_options (char * options, unsigned * mount_options)
401 {
402 char * p;
403
404 UFSD("ENTER\n");
405
406 if (!options)
407 return 1;
408
409 while ((p = strsep(&options, ",")) != NULL) {
410 substring_t args[MAX_OPT_ARGS];
411 int token;
412 if (!*p)
413 continue;
414
415 token = match_token(p, tokens, args);
416 switch (token) {
417 case Opt_type_old:
418 ufs_clear_opt (*mount_options, UFSTYPE);
419 ufs_set_opt (*mount_options, UFSTYPE_OLD);
420 break;
421 case Opt_type_sunx86:
422 ufs_clear_opt (*mount_options, UFSTYPE);
423 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
424 break;
425 case Opt_type_sun:
426 ufs_clear_opt (*mount_options, UFSTYPE);
427 ufs_set_opt (*mount_options, UFSTYPE_SUN);
428 break;
429 case Opt_type_sunos:
430 ufs_clear_opt(*mount_options, UFSTYPE);
431 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
432 break;
433 case Opt_type_44bsd:
434 ufs_clear_opt (*mount_options, UFSTYPE);
435 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
436 break;
437 case Opt_type_ufs2:
438 ufs_clear_opt(*mount_options, UFSTYPE);
439 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
440 break;
441 case Opt_type_hp:
442 ufs_clear_opt (*mount_options, UFSTYPE);
443 ufs_set_opt (*mount_options, UFSTYPE_HP);
444 break;
445 case Opt_type_nextstepcd:
446 ufs_clear_opt (*mount_options, UFSTYPE);
447 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
448 break;
449 case Opt_type_nextstep:
450 ufs_clear_opt (*mount_options, UFSTYPE);
451 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
452 break;
453 case Opt_type_openstep:
454 ufs_clear_opt (*mount_options, UFSTYPE);
455 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
456 break;
457 case Opt_onerror_panic:
458 ufs_clear_opt (*mount_options, ONERROR);
459 ufs_set_opt (*mount_options, ONERROR_PANIC);
460 break;
461 case Opt_onerror_lock:
462 ufs_clear_opt (*mount_options, ONERROR);
463 ufs_set_opt (*mount_options, ONERROR_LOCK);
464 break;
465 case Opt_onerror_umount:
466 ufs_clear_opt (*mount_options, ONERROR);
467 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
468 break;
469 case Opt_onerror_repair:
470 printk("UFS-fs: Unable to do repair on error, "
471 "will lock lock instead\n");
472 ufs_clear_opt (*mount_options, ONERROR);
473 ufs_set_opt (*mount_options, ONERROR_REPAIR);
474 break;
475 default:
476 printk("UFS-fs: Invalid option: \"%s\" "
477 "or missing value\n", p);
478 return 0;
479 }
480 }
481 return 1;
482 }
483
484 /*
485 * Different types of UFS hold fs_cstotal in different
486 * places, and use different data structure for it.
487 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
488 */
489 static void ufs_setup_cstotal(struct super_block *sb)
490 {
491 struct ufs_sb_info *sbi = UFS_SB(sb);
492 struct ufs_sb_private_info *uspi = sbi->s_uspi;
493 struct ufs_super_block_first *usb1;
494 struct ufs_super_block_second *usb2;
495 struct ufs_super_block_third *usb3;
496 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
497
498 UFSD("ENTER, mtype=%u\n", mtype);
499 usb1 = ubh_get_usb_first(uspi);
500 usb2 = ubh_get_usb_second(uspi);
501 usb3 = ubh_get_usb_third(uspi);
502
503 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
504 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
505 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
506 /*we have statistic in different place, then usual*/
507 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
508 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
509 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
510 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
511 } else {
512 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
513 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
514 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
515 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
516 }
517 UFSD("EXIT\n");
518 }
519
520 /*
521 * Read on-disk structures associated with cylinder groups
522 */
523 static int ufs_read_cylinder_structures(struct super_block *sb)
524 {
525 struct ufs_sb_info *sbi = UFS_SB(sb);
526 struct ufs_sb_private_info *uspi = sbi->s_uspi;
527 struct ufs_buffer_head * ubh;
528 unsigned char * base, * space;
529 unsigned size, blks, i;
530 struct ufs_super_block_third *usb3;
531
532 UFSD("ENTER\n");
533
534 usb3 = ubh_get_usb_third(uspi);
535 /*
536 * Read cs structures from (usually) first data block
537 * on the device.
538 */
539 size = uspi->s_cssize;
540 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
541 base = space = kmalloc(size, GFP_NOFS);
542 if (!base)
543 goto failed;
544 sbi->s_csp = (struct ufs_csum *)space;
545 for (i = 0; i < blks; i += uspi->s_fpb) {
546 size = uspi->s_bsize;
547 if (i + uspi->s_fpb > blks)
548 size = (blks - i) * uspi->s_fsize;
549
550 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
551
552 if (!ubh)
553 goto failed;
554
555 ubh_ubhcpymem (space, ubh, size);
556
557 space += size;
558 ubh_brelse (ubh);
559 ubh = NULL;
560 }
561
562 /*
563 * Read cylinder group (we read only first fragment from block
564 * at this time) and prepare internal data structures for cg caching.
565 */
566 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
567 goto failed;
568 for (i = 0; i < uspi->s_ncg; i++)
569 sbi->s_ucg[i] = NULL;
570 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
571 sbi->s_ucpi[i] = NULL;
572 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
573 }
574 for (i = 0; i < uspi->s_ncg; i++) {
575 UFSD("read cg %u\n", i);
576 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
577 goto failed;
578 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
579 goto failed;
580
581 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
582 }
583 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
584 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
585 goto failed;
586 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
587 }
588 sbi->s_cg_loaded = 0;
589 UFSD("EXIT\n");
590 return 1;
591
592 failed:
593 kfree (base);
594 if (sbi->s_ucg) {
595 for (i = 0; i < uspi->s_ncg; i++)
596 if (sbi->s_ucg[i])
597 brelse (sbi->s_ucg[i]);
598 kfree (sbi->s_ucg);
599 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
600 kfree (sbi->s_ucpi[i]);
601 }
602 UFSD("EXIT (FAILED)\n");
603 return 0;
604 }
605
606 /*
607 * Sync our internal copy of fs_cstotal with disk
608 */
609 static void ufs_put_cstotal(struct super_block *sb)
610 {
611 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
612 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
613 struct ufs_super_block_first *usb1;
614 struct ufs_super_block_second *usb2;
615 struct ufs_super_block_third *usb3;
616
617 UFSD("ENTER\n");
618 usb1 = ubh_get_usb_first(uspi);
619 usb2 = ubh_get_usb_second(uspi);
620 usb3 = ubh_get_usb_third(uspi);
621
622 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
623 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
624 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
625 /*we have statistic in different place, then usual*/
626 usb2->fs_un.fs_u2.cs_ndir =
627 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
628 usb2->fs_un.fs_u2.cs_nbfree =
629 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
630 usb3->fs_un1.fs_u2.cs_nifree =
631 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
632 usb3->fs_un1.fs_u2.cs_nffree =
633 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
634 } else {
635 usb1->fs_cstotal.cs_ndir =
636 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
637 usb1->fs_cstotal.cs_nbfree =
638 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
639 usb1->fs_cstotal.cs_nifree =
640 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
641 usb1->fs_cstotal.cs_nffree =
642 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
643 }
644 ubh_mark_buffer_dirty(USPI_UBH(uspi));
645 ufs_print_super_stuff(sb, usb1, usb2, usb3);
646 UFSD("EXIT\n");
647 }
648
649 /**
650 * ufs_put_super_internal() - put on-disk intrenal structures
651 * @sb: pointer to super_block structure
652 * Put on-disk structures associated with cylinder groups
653 * and write them back to disk, also update cs_total on disk
654 */
655 static void ufs_put_super_internal(struct super_block *sb)
656 {
657 struct ufs_sb_info *sbi = UFS_SB(sb);
658 struct ufs_sb_private_info *uspi = sbi->s_uspi;
659 struct ufs_buffer_head * ubh;
660 unsigned char * base, * space;
661 unsigned blks, size, i;
662
663
664 UFSD("ENTER\n");
665
666 ufs_put_cstotal(sb);
667 size = uspi->s_cssize;
668 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
669 base = space = (char*) sbi->s_csp;
670 for (i = 0; i < blks; i += uspi->s_fpb) {
671 size = uspi->s_bsize;
672 if (i + uspi->s_fpb > blks)
673 size = (blks - i) * uspi->s_fsize;
674
675 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
676
677 ubh_memcpyubh (ubh, space, size);
678 space += size;
679 ubh_mark_buffer_uptodate (ubh, 1);
680 ubh_mark_buffer_dirty (ubh);
681 ubh_brelse (ubh);
682 }
683 for (i = 0; i < sbi->s_cg_loaded; i++) {
684 ufs_put_cylinder (sb, i);
685 kfree (sbi->s_ucpi[i]);
686 }
687 for (; i < UFS_MAX_GROUP_LOADED; i++)
688 kfree (sbi->s_ucpi[i]);
689 for (i = 0; i < uspi->s_ncg; i++)
690 brelse (sbi->s_ucg[i]);
691 kfree (sbi->s_ucg);
692 kfree (base);
693
694 UFSD("EXIT\n");
695 }
696
697 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
698 {
699 struct ufs_sb_info * sbi;
700 struct ufs_sb_private_info * uspi;
701 struct ufs_super_block_first * usb1;
702 struct ufs_super_block_second * usb2;
703 struct ufs_super_block_third * usb3;
704 struct ufs_buffer_head * ubh;
705 struct inode *inode;
706 unsigned block_size, super_block_size;
707 unsigned flags;
708 unsigned super_block_offset;
709 unsigned maxsymlen;
710 int ret = -EINVAL;
711
712 uspi = NULL;
713 ubh = NULL;
714 flags = 0;
715
716 UFSD("ENTER\n");
717
718 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
719 if (!sbi)
720 goto failed_nomem;
721 sb->s_fs_info = sbi;
722
723 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
724
725 #ifndef CONFIG_UFS_FS_WRITE
726 if (!(sb->s_flags & MS_RDONLY)) {
727 printk("ufs was compiled with read-only support, "
728 "can't be mounted as read-write\n");
729 goto failed;
730 }
731 #endif
732 mutex_init(&sbi->mutex);
733 /*
734 * Set default mount options
735 * Parse mount options
736 */
737 sbi->s_mount_opt = 0;
738 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
739 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
740 printk("wrong mount options\n");
741 goto failed;
742 }
743 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
744 if (!silent)
745 printk("You didn't specify the type of your ufs filesystem\n\n"
746 "mount -t ufs -o ufstype="
747 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
748 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
749 "default is ufstype=old\n");
750 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
751 }
752
753 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
754 sbi->s_uspi = uspi;
755 if (!uspi)
756 goto failed;
757 uspi->s_dirblksize = UFS_SECTOR_SIZE;
758 super_block_offset=UFS_SBLOCK;
759
760 /* Keep 2Gig file limit. Some UFS variants need to override
761 this but as I don't know which I'll let those in the know loosen
762 the rules */
763 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
764 case UFS_MOUNT_UFSTYPE_44BSD:
765 UFSD("ufstype=44bsd\n");
766 uspi->s_fsize = block_size = 512;
767 uspi->s_fmask = ~(512 - 1);
768 uspi->s_fshift = 9;
769 uspi->s_sbsize = super_block_size = 1536;
770 uspi->s_sbbase = 0;
771 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
772 break;
773 case UFS_MOUNT_UFSTYPE_UFS2:
774 UFSD("ufstype=ufs2\n");
775 super_block_offset=SBLOCK_UFS2;
776 uspi->s_fsize = block_size = 512;
777 uspi->s_fmask = ~(512 - 1);
778 uspi->s_fshift = 9;
779 uspi->s_sbsize = super_block_size = 1536;
780 uspi->s_sbbase = 0;
781 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
782 break;
783
784 case UFS_MOUNT_UFSTYPE_SUN:
785 UFSD("ufstype=sun\n");
786 uspi->s_fsize = block_size = 1024;
787 uspi->s_fmask = ~(1024 - 1);
788 uspi->s_fshift = 10;
789 uspi->s_sbsize = super_block_size = 2048;
790 uspi->s_sbbase = 0;
791 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
792 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
793 break;
794
795 case UFS_MOUNT_UFSTYPE_SUNOS:
796 UFSD(("ufstype=sunos\n"))
797 uspi->s_fsize = block_size = 1024;
798 uspi->s_fmask = ~(1024 - 1);
799 uspi->s_fshift = 10;
800 uspi->s_sbsize = 2048;
801 super_block_size = 2048;
802 uspi->s_sbbase = 0;
803 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
804 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
805 break;
806
807 case UFS_MOUNT_UFSTYPE_SUNx86:
808 UFSD("ufstype=sunx86\n");
809 uspi->s_fsize = block_size = 1024;
810 uspi->s_fmask = ~(1024 - 1);
811 uspi->s_fshift = 10;
812 uspi->s_sbsize = super_block_size = 2048;
813 uspi->s_sbbase = 0;
814 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
815 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
816 break;
817
818 case UFS_MOUNT_UFSTYPE_OLD:
819 UFSD("ufstype=old\n");
820 uspi->s_fsize = block_size = 1024;
821 uspi->s_fmask = ~(1024 - 1);
822 uspi->s_fshift = 10;
823 uspi->s_sbsize = super_block_size = 2048;
824 uspi->s_sbbase = 0;
825 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
826 if (!(sb->s_flags & MS_RDONLY)) {
827 if (!silent)
828 printk(KERN_INFO "ufstype=old is supported read-only\n");
829 sb->s_flags |= MS_RDONLY;
830 }
831 break;
832
833 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
834 UFSD("ufstype=nextstep\n");
835 uspi->s_fsize = block_size = 1024;
836 uspi->s_fmask = ~(1024 - 1);
837 uspi->s_fshift = 10;
838 uspi->s_sbsize = super_block_size = 2048;
839 uspi->s_sbbase = 0;
840 uspi->s_dirblksize = 1024;
841 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
842 if (!(sb->s_flags & MS_RDONLY)) {
843 if (!silent)
844 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
845 sb->s_flags |= MS_RDONLY;
846 }
847 break;
848
849 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
850 UFSD("ufstype=nextstep-cd\n");
851 uspi->s_fsize = block_size = 2048;
852 uspi->s_fmask = ~(2048 - 1);
853 uspi->s_fshift = 11;
854 uspi->s_sbsize = super_block_size = 2048;
855 uspi->s_sbbase = 0;
856 uspi->s_dirblksize = 1024;
857 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
858 if (!(sb->s_flags & MS_RDONLY)) {
859 if (!silent)
860 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
861 sb->s_flags |= MS_RDONLY;
862 }
863 break;
864
865 case UFS_MOUNT_UFSTYPE_OPENSTEP:
866 UFSD("ufstype=openstep\n");
867 uspi->s_fsize = block_size = 1024;
868 uspi->s_fmask = ~(1024 - 1);
869 uspi->s_fshift = 10;
870 uspi->s_sbsize = super_block_size = 2048;
871 uspi->s_sbbase = 0;
872 uspi->s_dirblksize = 1024;
873 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
874 if (!(sb->s_flags & MS_RDONLY)) {
875 if (!silent)
876 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
877 sb->s_flags |= MS_RDONLY;
878 }
879 break;
880
881 case UFS_MOUNT_UFSTYPE_HP:
882 UFSD("ufstype=hp\n");
883 uspi->s_fsize = block_size = 1024;
884 uspi->s_fmask = ~(1024 - 1);
885 uspi->s_fshift = 10;
886 uspi->s_sbsize = super_block_size = 2048;
887 uspi->s_sbbase = 0;
888 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
889 if (!(sb->s_flags & MS_RDONLY)) {
890 if (!silent)
891 printk(KERN_INFO "ufstype=hp is supported read-only\n");
892 sb->s_flags |= MS_RDONLY;
893 }
894 break;
895 default:
896 if (!silent)
897 printk("unknown ufstype\n");
898 goto failed;
899 }
900
901 again:
902 if (!sb_set_blocksize(sb, block_size)) {
903 printk(KERN_ERR "UFS: failed to set blocksize\n");
904 goto failed;
905 }
906
907 /*
908 * read ufs super block from device
909 */
910
911 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
912
913 if (!ubh)
914 goto failed;
915
916 usb1 = ubh_get_usb_first(uspi);
917 usb2 = ubh_get_usb_second(uspi);
918 usb3 = ubh_get_usb_third(uspi);
919
920 /* Sort out mod used on SunOS 4.1.3 for fs_state */
921 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
922 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
923 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
924 flags &= ~UFS_ST_MASK;
925 flags |= UFS_ST_SUN;
926 }
927
928 /*
929 * Check ufs magic number
930 */
931 sbi->s_bytesex = BYTESEX_LE;
932 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
933 case UFS_MAGIC:
934 case UFS_MAGIC_BW:
935 case UFS2_MAGIC:
936 case UFS_MAGIC_LFN:
937 case UFS_MAGIC_FEA:
938 case UFS_MAGIC_4GB:
939 goto magic_found;
940 }
941 sbi->s_bytesex = BYTESEX_BE;
942 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
943 case UFS_MAGIC:
944 case UFS_MAGIC_BW:
945 case UFS2_MAGIC:
946 case UFS_MAGIC_LFN:
947 case UFS_MAGIC_FEA:
948 case UFS_MAGIC_4GB:
949 goto magic_found;
950 }
951
952 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
953 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
954 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
955 && uspi->s_sbbase < 256) {
956 ubh_brelse_uspi(uspi);
957 ubh = NULL;
958 uspi->s_sbbase += 8;
959 goto again;
960 }
961 if (!silent)
962 printk("ufs_read_super: bad magic number\n");
963 goto failed;
964
965 magic_found:
966 /*
967 * Check block and fragment sizes
968 */
969 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
970 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
971 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
972 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
973 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
974
975 if (!is_power_of_2(uspi->s_fsize)) {
976 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
977 uspi->s_fsize);
978 goto failed;
979 }
980 if (uspi->s_fsize < 512) {
981 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
982 uspi->s_fsize);
983 goto failed;
984 }
985 if (uspi->s_fsize > 4096) {
986 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
987 uspi->s_fsize);
988 goto failed;
989 }
990 if (!is_power_of_2(uspi->s_bsize)) {
991 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
992 uspi->s_bsize);
993 goto failed;
994 }
995 if (uspi->s_bsize < 4096) {
996 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
997 uspi->s_bsize);
998 goto failed;
999 }
1000 if (uspi->s_bsize / uspi->s_fsize > 8) {
1001 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1002 uspi->s_bsize / uspi->s_fsize);
1003 goto failed;
1004 }
1005 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1006 ubh_brelse_uspi(uspi);
1007 ubh = NULL;
1008 block_size = uspi->s_fsize;
1009 super_block_size = uspi->s_sbsize;
1010 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1011 goto again;
1012 }
1013
1014 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1015 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1016
1017 /*
1018 * Check, if file system was correctly unmounted.
1019 * If not, make it read only.
1020 */
1021 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1022 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1023 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1024 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1025 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1026 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1027 switch(usb1->fs_clean) {
1028 case UFS_FSCLEAN:
1029 UFSD("fs is clean\n");
1030 break;
1031 case UFS_FSSTABLE:
1032 UFSD("fs is stable\n");
1033 break;
1034 case UFS_FSLOG:
1035 UFSD("fs is logging fs\n");
1036 break;
1037 case UFS_FSOSF1:
1038 UFSD("fs is DEC OSF/1\n");
1039 break;
1040 case UFS_FSACTIVE:
1041 printk("ufs_read_super: fs is active\n");
1042 sb->s_flags |= MS_RDONLY;
1043 break;
1044 case UFS_FSBAD:
1045 printk("ufs_read_super: fs is bad\n");
1046 sb->s_flags |= MS_RDONLY;
1047 break;
1048 default:
1049 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1050 sb->s_flags |= MS_RDONLY;
1051 break;
1052 }
1053 } else {
1054 printk("ufs_read_super: fs needs fsck\n");
1055 sb->s_flags |= MS_RDONLY;
1056 }
1057
1058 /*
1059 * Read ufs_super_block into internal data structures
1060 */
1061 sb->s_op = &ufs_super_ops;
1062 sb->s_export_op = &ufs_export_ops;
1063
1064 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1065
1066 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1067 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1068 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1069 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1070 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1071 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1072
1073 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1074 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1075 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1076 } else {
1077 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1078 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1079 }
1080
1081 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1082 /* s_bsize already set */
1083 /* s_fsize already set */
1084 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1085 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1086 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1087 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1088 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1089 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1090 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1091 uspi->s_fshift);
1092 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1093 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1094 /* s_sbsize already set */
1095 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1096 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1097 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1098 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1099 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1100 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1101 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1102 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1103
1104 if (uspi->fs_magic == UFS2_MAGIC)
1105 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1106 else
1107 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1108
1109 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1110 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1111 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1112 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1113 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1114 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1115 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1116 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1117 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1118 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1119 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1120 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1121 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1122 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1123
1124 /*
1125 * Compute another frequently used values
1126 */
1127 uspi->s_fpbmask = uspi->s_fpb - 1;
1128 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1129 uspi->s_apbshift = uspi->s_bshift - 3;
1130 else
1131 uspi->s_apbshift = uspi->s_bshift - 2;
1132
1133 uspi->s_2apbshift = uspi->s_apbshift * 2;
1134 uspi->s_3apbshift = uspi->s_apbshift * 3;
1135 uspi->s_apb = 1 << uspi->s_apbshift;
1136 uspi->s_2apb = 1 << uspi->s_2apbshift;
1137 uspi->s_3apb = 1 << uspi->s_3apbshift;
1138 uspi->s_apbmask = uspi->s_apb - 1;
1139 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1140 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1141 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1142 uspi->s_bpf = uspi->s_fsize << 3;
1143 uspi->s_bpfshift = uspi->s_fshift + 3;
1144 uspi->s_bpfmask = uspi->s_bpf - 1;
1145 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1146 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1147 uspi->s_maxsymlinklen =
1148 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1149
1150 if (uspi->fs_magic == UFS2_MAGIC)
1151 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1152 else
1153 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1154 if (uspi->s_maxsymlinklen > maxsymlen) {
1155 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1156 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1157 uspi->s_maxsymlinklen = maxsymlen;
1158 }
1159 sb->s_max_links = UFS_LINK_MAX;
1160
1161 inode = ufs_iget(sb, UFS_ROOTINO);
1162 if (IS_ERR(inode)) {
1163 ret = PTR_ERR(inode);
1164 goto failed;
1165 }
1166 sb->s_root = d_make_root(inode);
1167 if (!sb->s_root) {
1168 ret = -ENOMEM;
1169 goto failed;
1170 }
1171
1172 ufs_setup_cstotal(sb);
1173 /*
1174 * Read cylinder group structures
1175 */
1176 if (!(sb->s_flags & MS_RDONLY))
1177 if (!ufs_read_cylinder_structures(sb))
1178 goto failed;
1179
1180 UFSD("EXIT\n");
1181 return 0;
1182
1183 failed:
1184 if (ubh)
1185 ubh_brelse_uspi (uspi);
1186 kfree (uspi);
1187 kfree(sbi);
1188 sb->s_fs_info = NULL;
1189 UFSD("EXIT (FAILED)\n");
1190 return ret;
1191
1192 failed_nomem:
1193 UFSD("EXIT (NOMEM)\n");
1194 return -ENOMEM;
1195 }
1196
1197 static int ufs_sync_fs(struct super_block *sb, int wait)
1198 {
1199 struct ufs_sb_private_info * uspi;
1200 struct ufs_super_block_first * usb1;
1201 struct ufs_super_block_third * usb3;
1202 unsigned flags;
1203
1204 lock_ufs(sb);
1205 lock_super(sb);
1206
1207 UFSD("ENTER\n");
1208
1209 flags = UFS_SB(sb)->s_flags;
1210 uspi = UFS_SB(sb)->s_uspi;
1211 usb1 = ubh_get_usb_first(uspi);
1212 usb3 = ubh_get_usb_third(uspi);
1213
1214 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1215 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1216 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1217 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1218 ufs_set_fs_state(sb, usb1, usb3,
1219 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1220 ufs_put_cstotal(sb);
1221 sb->s_dirt = 0;
1222
1223 UFSD("EXIT\n");
1224 unlock_super(sb);
1225 unlock_ufs(sb);
1226
1227 return 0;
1228 }
1229
1230 static void ufs_write_super(struct super_block *sb)
1231 {
1232 if (!(sb->s_flags & MS_RDONLY))
1233 ufs_sync_fs(sb, 1);
1234 else
1235 sb->s_dirt = 0;
1236 }
1237
1238 static void ufs_put_super(struct super_block *sb)
1239 {
1240 struct ufs_sb_info * sbi = UFS_SB(sb);
1241
1242 UFSD("ENTER\n");
1243
1244 if (sb->s_dirt)
1245 ufs_write_super(sb);
1246
1247 if (!(sb->s_flags & MS_RDONLY))
1248 ufs_put_super_internal(sb);
1249
1250 ubh_brelse_uspi (sbi->s_uspi);
1251 kfree (sbi->s_uspi);
1252 kfree (sbi);
1253 sb->s_fs_info = NULL;
1254 UFSD("EXIT\n");
1255 return;
1256 }
1257
1258
1259 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1260 {
1261 struct ufs_sb_private_info * uspi;
1262 struct ufs_super_block_first * usb1;
1263 struct ufs_super_block_third * usb3;
1264 unsigned new_mount_opt, ufstype;
1265 unsigned flags;
1266
1267 lock_ufs(sb);
1268 lock_super(sb);
1269 uspi = UFS_SB(sb)->s_uspi;
1270 flags = UFS_SB(sb)->s_flags;
1271 usb1 = ubh_get_usb_first(uspi);
1272 usb3 = ubh_get_usb_third(uspi);
1273
1274 /*
1275 * Allow the "check" option to be passed as a remount option.
1276 * It is not possible to change ufstype option during remount
1277 */
1278 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1279 new_mount_opt = 0;
1280 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1281 if (!ufs_parse_options (data, &new_mount_opt)) {
1282 unlock_super(sb);
1283 unlock_ufs(sb);
1284 return -EINVAL;
1285 }
1286 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1287 new_mount_opt |= ufstype;
1288 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1289 printk("ufstype can't be changed during remount\n");
1290 unlock_super(sb);
1291 unlock_ufs(sb);
1292 return -EINVAL;
1293 }
1294
1295 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1296 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1297 unlock_super(sb);
1298 unlock_ufs(sb);
1299 return 0;
1300 }
1301
1302 /*
1303 * fs was mouted as rw, remounting ro
1304 */
1305 if (*mount_flags & MS_RDONLY) {
1306 ufs_put_super_internal(sb);
1307 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1308 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1309 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1310 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1311 ufs_set_fs_state(sb, usb1, usb3,
1312 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1313 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1314 sb->s_dirt = 0;
1315 sb->s_flags |= MS_RDONLY;
1316 } else {
1317 /*
1318 * fs was mounted as ro, remounting rw
1319 */
1320 #ifndef CONFIG_UFS_FS_WRITE
1321 printk("ufs was compiled with read-only support, "
1322 "can't be mounted as read-write\n");
1323 unlock_super(sb);
1324 unlock_ufs(sb);
1325 return -EINVAL;
1326 #else
1327 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1328 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1329 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1330 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1331 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1332 printk("this ufstype is read-only supported\n");
1333 unlock_super(sb);
1334 unlock_ufs(sb);
1335 return -EINVAL;
1336 }
1337 if (!ufs_read_cylinder_structures(sb)) {
1338 printk("failed during remounting\n");
1339 unlock_super(sb);
1340 unlock_ufs(sb);
1341 return -EPERM;
1342 }
1343 sb->s_flags &= ~MS_RDONLY;
1344 #endif
1345 }
1346 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1347 unlock_super(sb);
1348 unlock_ufs(sb);
1349 return 0;
1350 }
1351
1352 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1353 {
1354 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1355 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1356 const struct match_token *tp = tokens;
1357
1358 while (tp->token != Opt_onerror_panic && tp->token != mval)
1359 ++tp;
1360 BUG_ON(tp->token == Opt_onerror_panic);
1361 seq_printf(seq, ",%s", tp->pattern);
1362
1363 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1364 while (tp->token != Opt_err && tp->token != mval)
1365 ++tp;
1366 BUG_ON(tp->token == Opt_err);
1367 seq_printf(seq, ",%s", tp->pattern);
1368
1369 return 0;
1370 }
1371
1372 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1373 {
1374 struct super_block *sb = dentry->d_sb;
1375 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1376 unsigned flags = UFS_SB(sb)->s_flags;
1377 struct ufs_super_block_first *usb1;
1378 struct ufs_super_block_second *usb2;
1379 struct ufs_super_block_third *usb3;
1380 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1381
1382 lock_ufs(sb);
1383
1384 usb1 = ubh_get_usb_first(uspi);
1385 usb2 = ubh_get_usb_second(uspi);
1386 usb3 = ubh_get_usb_third(uspi);
1387
1388 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1389 buf->f_type = UFS2_MAGIC;
1390 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1391 } else {
1392 buf->f_type = UFS_MAGIC;
1393 buf->f_blocks = uspi->s_dsize;
1394 }
1395 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1396 uspi->cs_total.cs_nffree;
1397 buf->f_ffree = uspi->cs_total.cs_nifree;
1398 buf->f_bsize = sb->s_blocksize;
1399 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1400 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1401 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1402 buf->f_namelen = UFS_MAXNAMLEN;
1403 buf->f_fsid.val[0] = (u32)id;
1404 buf->f_fsid.val[1] = (u32)(id >> 32);
1405
1406 unlock_ufs(sb);
1407
1408 return 0;
1409 }
1410
1411 static struct kmem_cache * ufs_inode_cachep;
1412
1413 static struct inode *ufs_alloc_inode(struct super_block *sb)
1414 {
1415 struct ufs_inode_info *ei;
1416 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1417 if (!ei)
1418 return NULL;
1419 ei->vfs_inode.i_version = 1;
1420 return &ei->vfs_inode;
1421 }
1422
1423 static void ufs_i_callback(struct rcu_head *head)
1424 {
1425 struct inode *inode = container_of(head, struct inode, i_rcu);
1426 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1427 }
1428
1429 static void ufs_destroy_inode(struct inode *inode)
1430 {
1431 call_rcu(&inode->i_rcu, ufs_i_callback);
1432 }
1433
1434 static void init_once(void *foo)
1435 {
1436 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1437
1438 inode_init_once(&ei->vfs_inode);
1439 }
1440
1441 static int init_inodecache(void)
1442 {
1443 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1444 sizeof(struct ufs_inode_info),
1445 0, (SLAB_RECLAIM_ACCOUNT|
1446 SLAB_MEM_SPREAD),
1447 init_once);
1448 if (ufs_inode_cachep == NULL)
1449 return -ENOMEM;
1450 return 0;
1451 }
1452
1453 static void destroy_inodecache(void)
1454 {
1455 kmem_cache_destroy(ufs_inode_cachep);
1456 }
1457
1458 static const struct super_operations ufs_super_ops = {
1459 .alloc_inode = ufs_alloc_inode,
1460 .destroy_inode = ufs_destroy_inode,
1461 .write_inode = ufs_write_inode,
1462 .evict_inode = ufs_evict_inode,
1463 .put_super = ufs_put_super,
1464 .write_super = ufs_write_super,
1465 .sync_fs = ufs_sync_fs,
1466 .statfs = ufs_statfs,
1467 .remount_fs = ufs_remount,
1468 .show_options = ufs_show_options,
1469 };
1470
1471 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1472 int flags, const char *dev_name, void *data)
1473 {
1474 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1475 }
1476
1477 static struct file_system_type ufs_fs_type = {
1478 .owner = THIS_MODULE,
1479 .name = "ufs",
1480 .mount = ufs_mount,
1481 .kill_sb = kill_block_super,
1482 .fs_flags = FS_REQUIRES_DEV,
1483 };
1484
1485 static int __init init_ufs_fs(void)
1486 {
1487 int err = init_inodecache();
1488 if (err)
1489 goto out1;
1490 err = register_filesystem(&ufs_fs_type);
1491 if (err)
1492 goto out;
1493 return 0;
1494 out:
1495 destroy_inodecache();
1496 out1:
1497 return err;
1498 }
1499
1500 static void __exit exit_ufs_fs(void)
1501 {
1502 unregister_filesystem(&ufs_fs_type);
1503 destroy_inodecache();
1504 }
1505
1506 module_init(init_ufs_fs)
1507 module_exit(exit_ufs_fs)
1508 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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