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Merge tag 'trace-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[mirror_ubuntu-bionic-kernel.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 #include <linux/exportfs.h>
69 #include <linux/module.h>
70 #include <linux/bitops.h>
71
72 #include <stdarg.h>
73
74 #include <asm/uaccess.h>
75
76 #include <linux/errno.h>
77 #include <linux/fs.h>
78 #include <linux/slab.h>
79 #include <linux/time.h>
80 #include <linux/stat.h>
81 #include <linux/string.h>
82 #include <linux/blkdev.h>
83 #include <linux/init.h>
84 #include <linux/parser.h>
85 #include <linux/buffer_head.h>
86 #include <linux/vfs.h>
87 #include <linux/log2.h>
88 #include <linux/mount.h>
89 #include <linux/seq_file.h>
90
91 #include "ufs_fs.h"
92 #include "ufs.h"
93 #include "swab.h"
94 #include "util.h"
95
96 void lock_ufs(struct super_block *sb)
97 {
98 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
99 struct ufs_sb_info *sbi = UFS_SB(sb);
100
101 mutex_lock(&sbi->mutex);
102 sbi->mutex_owner = current;
103 #endif
104 }
105
106 void unlock_ufs(struct super_block *sb)
107 {
108 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
109 struct ufs_sb_info *sbi = UFS_SB(sb);
110
111 sbi->mutex_owner = NULL;
112 mutex_unlock(&sbi->mutex);
113 #endif
114 }
115
116 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
117 {
118 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
119 struct inode *inode;
120
121 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
122 return ERR_PTR(-ESTALE);
123
124 inode = ufs_iget(sb, ino);
125 if (IS_ERR(inode))
126 return ERR_CAST(inode);
127 if (generation && inode->i_generation != generation) {
128 iput(inode);
129 return ERR_PTR(-ESTALE);
130 }
131 return inode;
132 }
133
134 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
135 int fh_len, int fh_type)
136 {
137 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
138 }
139
140 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
141 int fh_len, int fh_type)
142 {
143 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
144 }
145
146 static struct dentry *ufs_get_parent(struct dentry *child)
147 {
148 struct qstr dot_dot = QSTR_INIT("..", 2);
149 ino_t ino;
150
151 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
152 if (!ino)
153 return ERR_PTR(-ENOENT);
154 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
155 }
156
157 static const struct export_operations ufs_export_ops = {
158 .fh_to_dentry = ufs_fh_to_dentry,
159 .fh_to_parent = ufs_fh_to_parent,
160 .get_parent = ufs_get_parent,
161 };
162
163 #ifdef CONFIG_UFS_DEBUG
164 /*
165 * Print contents of ufs_super_block, useful for debugging
166 */
167 static void ufs_print_super_stuff(struct super_block *sb,
168 struct ufs_super_block_first *usb1,
169 struct ufs_super_block_second *usb2,
170 struct ufs_super_block_third *usb3)
171 {
172 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
173
174 pr_debug("ufs_print_super_stuff\n");
175 pr_debug(" magic: 0x%x\n", magic);
176 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
177 pr_debug(" fs_size: %llu\n", (unsigned long long)
178 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
179 pr_debug(" fs_dsize: %llu\n", (unsigned long long)
180 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
181 pr_debug(" bsize: %u\n",
182 fs32_to_cpu(sb, usb1->fs_bsize));
183 pr_debug(" fsize: %u\n",
184 fs32_to_cpu(sb, usb1->fs_fsize));
185 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
186 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
187 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
188 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
189 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
190 pr_debug(" cs_nbfree(No of free blocks): %llu\n",
191 (unsigned long long)
192 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
193 pr_info(" cs_nifree(Num of free inodes): %llu\n",
194 (unsigned long long)
195 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
196 pr_info(" cs_nffree(Num of free frags): %llu\n",
197 (unsigned long long)
198 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
199 pr_info(" fs_maxsymlinklen: %u\n",
200 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
201 } else {
202 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
203 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
204 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
205 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
206 pr_debug(" cgoffset: %u\n",
207 fs32_to_cpu(sb, usb1->fs_cgoffset));
208 pr_debug(" ~cgmask: 0x%x\n",
209 ~fs32_to_cpu(sb, usb1->fs_cgmask));
210 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
211 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
212 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
213 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
214 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
215 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
216 pr_debug(" fragshift: %u\n",
217 fs32_to_cpu(sb, usb1->fs_fragshift));
218 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
219 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
220 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
221 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
222 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
223 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
224 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
225 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
226 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
227 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
228 pr_debug(" fstodb: %u\n",
229 fs32_to_cpu(sb, usb1->fs_fsbtodb));
230 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
231 pr_debug(" ndir %u\n",
232 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
233 pr_debug(" nifree %u\n",
234 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
235 pr_debug(" nbfree %u\n",
236 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
237 pr_debug(" nffree %u\n",
238 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
239 }
240 pr_debug("\n");
241 }
242
243 /*
244 * Print contents of ufs_cylinder_group, useful for debugging
245 */
246 static void ufs_print_cylinder_stuff(struct super_block *sb,
247 struct ufs_cylinder_group *cg)
248 {
249 pr_debug("\nufs_print_cylinder_stuff\n");
250 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
251 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
252 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
253 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
254 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
255 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
256 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
257 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
258 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
259 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
260 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
261 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
262 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
263 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
264 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
265 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
266 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
267 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
268 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
269 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
270 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
271 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
272 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
273 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
274 pr_debug(" clustersumoff %u\n",
275 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
276 pr_debug(" clusteroff %u\n",
277 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
278 pr_debug(" nclusterblks %u\n",
279 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
280 pr_debug("\n");
281 }
282 #else
283 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
284 # define ufs_print_cylinder_stuff(sb, cg) /**/
285 #endif /* CONFIG_UFS_DEBUG */
286
287 static const struct super_operations ufs_super_ops;
288
289 void ufs_error (struct super_block * sb, const char * function,
290 const char * fmt, ...)
291 {
292 struct ufs_sb_private_info * uspi;
293 struct ufs_super_block_first * usb1;
294 struct va_format vaf;
295 va_list args;
296
297 uspi = UFS_SB(sb)->s_uspi;
298 usb1 = ubh_get_usb_first(uspi);
299
300 if (!(sb->s_flags & MS_RDONLY)) {
301 usb1->fs_clean = UFS_FSBAD;
302 ubh_mark_buffer_dirty(USPI_UBH(uspi));
303 ufs_mark_sb_dirty(sb);
304 sb->s_flags |= MS_RDONLY;
305 }
306 va_start(args, fmt);
307 vaf.fmt = fmt;
308 vaf.va = &args;
309 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
310 case UFS_MOUNT_ONERROR_PANIC:
311 panic("panic (device %s): %s: %pV\n",
312 sb->s_id, function, &vaf);
313
314 case UFS_MOUNT_ONERROR_LOCK:
315 case UFS_MOUNT_ONERROR_UMOUNT:
316 case UFS_MOUNT_ONERROR_REPAIR:
317 pr_crit("error (device %s): %s: %pV\n",
318 sb->s_id, function, &vaf);
319 }
320 va_end(args);
321 }
322
323 void ufs_panic (struct super_block * sb, const char * function,
324 const char * fmt, ...)
325 {
326 struct ufs_sb_private_info * uspi;
327 struct ufs_super_block_first * usb1;
328 struct va_format vaf;
329 va_list args;
330
331 uspi = UFS_SB(sb)->s_uspi;
332 usb1 = ubh_get_usb_first(uspi);
333
334 if (!(sb->s_flags & MS_RDONLY)) {
335 usb1->fs_clean = UFS_FSBAD;
336 ubh_mark_buffer_dirty(USPI_UBH(uspi));
337 ufs_mark_sb_dirty(sb);
338 }
339 va_start(args, fmt);
340 vaf.fmt = fmt;
341 vaf.va = &args;
342 sb->s_flags |= MS_RDONLY;
343 pr_crit("panic (device %s): %s: %pV\n",
344 sb->s_id, function, &vaf);
345 va_end(args);
346 }
347
348 void ufs_warning (struct super_block * sb, const char * function,
349 const char * fmt, ...)
350 {
351 struct va_format vaf;
352 va_list args;
353
354 va_start(args, fmt);
355 vaf.fmt = fmt;
356 vaf.va = &args;
357 pr_warn("(device %s): %s: %pV\n",
358 sb->s_id, function, &vaf);
359 va_end(args);
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 pr_err("Unable to do repair on error, will lock lock instead\n");
471 ufs_clear_opt (*mount_options, ONERROR);
472 ufs_set_opt (*mount_options, ONERROR_REPAIR);
473 break;
474 default:
475 pr_err("Invalid option: \"%s\" or missing value\n", p);
476 return 0;
477 }
478 }
479 return 1;
480 }
481
482 /*
483 * Different types of UFS hold fs_cstotal in different
484 * places, and use different data structure for it.
485 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
486 */
487 static void ufs_setup_cstotal(struct super_block *sb)
488 {
489 struct ufs_sb_info *sbi = UFS_SB(sb);
490 struct ufs_sb_private_info *uspi = sbi->s_uspi;
491 struct ufs_super_block_first *usb1;
492 struct ufs_super_block_second *usb2;
493 struct ufs_super_block_third *usb3;
494 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
495
496 UFSD("ENTER, mtype=%u\n", mtype);
497 usb1 = ubh_get_usb_first(uspi);
498 usb2 = ubh_get_usb_second(uspi);
499 usb3 = ubh_get_usb_third(uspi);
500
501 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
502 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
503 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
504 /*we have statistic in different place, then usual*/
505 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
506 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
507 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
508 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
509 } else {
510 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
511 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
512 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
513 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
514 }
515 UFSD("EXIT\n");
516 }
517
518 /*
519 * Read on-disk structures associated with cylinder groups
520 */
521 static int ufs_read_cylinder_structures(struct super_block *sb)
522 {
523 struct ufs_sb_info *sbi = UFS_SB(sb);
524 struct ufs_sb_private_info *uspi = sbi->s_uspi;
525 struct ufs_buffer_head * ubh;
526 unsigned char * base, * space;
527 unsigned size, blks, i;
528
529 UFSD("ENTER\n");
530
531 /*
532 * Read cs structures from (usually) first data block
533 * on the device.
534 */
535 size = uspi->s_cssize;
536 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
537 base = space = kmalloc(size, GFP_NOFS);
538 if (!base)
539 goto failed;
540 sbi->s_csp = (struct ufs_csum *)space;
541 for (i = 0; i < blks; i += uspi->s_fpb) {
542 size = uspi->s_bsize;
543 if (i + uspi->s_fpb > blks)
544 size = (blks - i) * uspi->s_fsize;
545
546 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
547
548 if (!ubh)
549 goto failed;
550
551 ubh_ubhcpymem (space, ubh, size);
552
553 space += size;
554 ubh_brelse (ubh);
555 ubh = NULL;
556 }
557
558 /*
559 * Read cylinder group (we read only first fragment from block
560 * at this time) and prepare internal data structures for cg caching.
561 */
562 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
563 goto failed;
564 for (i = 0; i < uspi->s_ncg; i++)
565 sbi->s_ucg[i] = NULL;
566 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
567 sbi->s_ucpi[i] = NULL;
568 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
569 }
570 for (i = 0; i < uspi->s_ncg; i++) {
571 UFSD("read cg %u\n", i);
572 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
573 goto failed;
574 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
575 goto failed;
576
577 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
578 }
579 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
580 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
581 goto failed;
582 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
583 }
584 sbi->s_cg_loaded = 0;
585 UFSD("EXIT\n");
586 return 1;
587
588 failed:
589 kfree (base);
590 if (sbi->s_ucg) {
591 for (i = 0; i < uspi->s_ncg; i++)
592 if (sbi->s_ucg[i])
593 brelse (sbi->s_ucg[i]);
594 kfree (sbi->s_ucg);
595 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
596 kfree (sbi->s_ucpi[i]);
597 }
598 UFSD("EXIT (FAILED)\n");
599 return 0;
600 }
601
602 /*
603 * Sync our internal copy of fs_cstotal with disk
604 */
605 static void ufs_put_cstotal(struct super_block *sb)
606 {
607 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
608 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
609 struct ufs_super_block_first *usb1;
610 struct ufs_super_block_second *usb2;
611 struct ufs_super_block_third *usb3;
612
613 UFSD("ENTER\n");
614 usb1 = ubh_get_usb_first(uspi);
615 usb2 = ubh_get_usb_second(uspi);
616 usb3 = ubh_get_usb_third(uspi);
617
618 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
619 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
620 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
621 /*we have statistic in different place, then usual*/
622 usb2->fs_un.fs_u2.cs_ndir =
623 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
624 usb2->fs_un.fs_u2.cs_nbfree =
625 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
626 usb3->fs_un1.fs_u2.cs_nifree =
627 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
628 usb3->fs_un1.fs_u2.cs_nffree =
629 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
630 } else {
631 usb1->fs_cstotal.cs_ndir =
632 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
633 usb1->fs_cstotal.cs_nbfree =
634 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
635 usb1->fs_cstotal.cs_nifree =
636 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
637 usb1->fs_cstotal.cs_nffree =
638 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
639 }
640 ubh_mark_buffer_dirty(USPI_UBH(uspi));
641 ufs_print_super_stuff(sb, usb1, usb2, usb3);
642 UFSD("EXIT\n");
643 }
644
645 /**
646 * ufs_put_super_internal() - put on-disk intrenal structures
647 * @sb: pointer to super_block structure
648 * Put on-disk structures associated with cylinder groups
649 * and write them back to disk, also update cs_total on disk
650 */
651 static void ufs_put_super_internal(struct super_block *sb)
652 {
653 struct ufs_sb_info *sbi = UFS_SB(sb);
654 struct ufs_sb_private_info *uspi = sbi->s_uspi;
655 struct ufs_buffer_head * ubh;
656 unsigned char * base, * space;
657 unsigned blks, size, i;
658
659
660 UFSD("ENTER\n");
661
662 ufs_put_cstotal(sb);
663 size = uspi->s_cssize;
664 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
665 base = space = (char*) sbi->s_csp;
666 for (i = 0; i < blks; i += uspi->s_fpb) {
667 size = uspi->s_bsize;
668 if (i + uspi->s_fpb > blks)
669 size = (blks - i) * uspi->s_fsize;
670
671 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
672
673 ubh_memcpyubh (ubh, space, size);
674 space += size;
675 ubh_mark_buffer_uptodate (ubh, 1);
676 ubh_mark_buffer_dirty (ubh);
677 ubh_brelse (ubh);
678 }
679 for (i = 0; i < sbi->s_cg_loaded; i++) {
680 ufs_put_cylinder (sb, i);
681 kfree (sbi->s_ucpi[i]);
682 }
683 for (; i < UFS_MAX_GROUP_LOADED; i++)
684 kfree (sbi->s_ucpi[i]);
685 for (i = 0; i < uspi->s_ncg; i++)
686 brelse (sbi->s_ucg[i]);
687 kfree (sbi->s_ucg);
688 kfree (base);
689
690 UFSD("EXIT\n");
691 }
692
693 static int ufs_sync_fs(struct super_block *sb, int wait)
694 {
695 struct ufs_sb_private_info * uspi;
696 struct ufs_super_block_first * usb1;
697 struct ufs_super_block_third * usb3;
698 unsigned flags;
699
700 lock_ufs(sb);
701
702 UFSD("ENTER\n");
703
704 flags = UFS_SB(sb)->s_flags;
705 uspi = UFS_SB(sb)->s_uspi;
706 usb1 = ubh_get_usb_first(uspi);
707 usb3 = ubh_get_usb_third(uspi);
708
709 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
710 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
711 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
712 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
713 ufs_set_fs_state(sb, usb1, usb3,
714 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
715 ufs_put_cstotal(sb);
716
717 UFSD("EXIT\n");
718 unlock_ufs(sb);
719
720 return 0;
721 }
722
723 static void delayed_sync_fs(struct work_struct *work)
724 {
725 struct ufs_sb_info *sbi;
726
727 sbi = container_of(work, struct ufs_sb_info, sync_work.work);
728
729 spin_lock(&sbi->work_lock);
730 sbi->work_queued = 0;
731 spin_unlock(&sbi->work_lock);
732
733 ufs_sync_fs(sbi->sb, 1);
734 }
735
736 void ufs_mark_sb_dirty(struct super_block *sb)
737 {
738 struct ufs_sb_info *sbi = UFS_SB(sb);
739 unsigned long delay;
740
741 spin_lock(&sbi->work_lock);
742 if (!sbi->work_queued) {
743 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
744 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
745 sbi->work_queued = 1;
746 }
747 spin_unlock(&sbi->work_lock);
748 }
749
750 static void ufs_put_super(struct super_block *sb)
751 {
752 struct ufs_sb_info * sbi = UFS_SB(sb);
753
754 UFSD("ENTER\n");
755
756 if (!(sb->s_flags & MS_RDONLY))
757 ufs_put_super_internal(sb);
758 cancel_delayed_work_sync(&sbi->sync_work);
759
760 ubh_brelse_uspi (sbi->s_uspi);
761 kfree (sbi->s_uspi);
762 mutex_destroy(&sbi->mutex);
763 kfree (sbi);
764 sb->s_fs_info = NULL;
765 UFSD("EXIT\n");
766 return;
767 }
768
769 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
770 {
771 struct ufs_sb_info * sbi;
772 struct ufs_sb_private_info * uspi;
773 struct ufs_super_block_first * usb1;
774 struct ufs_super_block_second * usb2;
775 struct ufs_super_block_third * usb3;
776 struct ufs_buffer_head * ubh;
777 struct inode *inode;
778 unsigned block_size, super_block_size;
779 unsigned flags;
780 unsigned super_block_offset;
781 unsigned maxsymlen;
782 int ret = -EINVAL;
783
784 uspi = NULL;
785 ubh = NULL;
786 flags = 0;
787
788 UFSD("ENTER\n");
789
790 #ifndef CONFIG_UFS_FS_WRITE
791 if (!(sb->s_flags & MS_RDONLY)) {
792 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
793 return -EROFS;
794 }
795 #endif
796
797 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
798 if (!sbi)
799 goto failed_nomem;
800 sb->s_fs_info = sbi;
801 sbi->sb = sb;
802
803 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
804
805 mutex_init(&sbi->mutex);
806 spin_lock_init(&sbi->work_lock);
807 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
808 /*
809 * Set default mount options
810 * Parse mount options
811 */
812 sbi->s_mount_opt = 0;
813 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
814 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
815 pr_err("wrong mount options\n");
816 goto failed;
817 }
818 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
819 if (!silent)
820 pr_err("You didn't specify the type of your ufs filesystem\n\n"
821 "mount -t ufs -o ufstype="
822 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
823 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
824 "default is ufstype=old\n");
825 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
826 }
827
828 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
829 sbi->s_uspi = uspi;
830 if (!uspi)
831 goto failed;
832 uspi->s_dirblksize = UFS_SECTOR_SIZE;
833 super_block_offset=UFS_SBLOCK;
834
835 /* Keep 2Gig file limit. Some UFS variants need to override
836 this but as I don't know which I'll let those in the know loosen
837 the rules */
838 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
839 case UFS_MOUNT_UFSTYPE_44BSD:
840 UFSD("ufstype=44bsd\n");
841 uspi->s_fsize = block_size = 512;
842 uspi->s_fmask = ~(512 - 1);
843 uspi->s_fshift = 9;
844 uspi->s_sbsize = super_block_size = 1536;
845 uspi->s_sbbase = 0;
846 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
847 break;
848 case UFS_MOUNT_UFSTYPE_UFS2:
849 UFSD("ufstype=ufs2\n");
850 super_block_offset=SBLOCK_UFS2;
851 uspi->s_fsize = block_size = 512;
852 uspi->s_fmask = ~(512 - 1);
853 uspi->s_fshift = 9;
854 uspi->s_sbsize = super_block_size = 1536;
855 uspi->s_sbbase = 0;
856 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
857 break;
858
859 case UFS_MOUNT_UFSTYPE_SUN:
860 UFSD("ufstype=sun\n");
861 uspi->s_fsize = block_size = 1024;
862 uspi->s_fmask = ~(1024 - 1);
863 uspi->s_fshift = 10;
864 uspi->s_sbsize = super_block_size = 2048;
865 uspi->s_sbbase = 0;
866 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
867 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
868 break;
869
870 case UFS_MOUNT_UFSTYPE_SUNOS:
871 UFSD("ufstype=sunos\n");
872 uspi->s_fsize = block_size = 1024;
873 uspi->s_fmask = ~(1024 - 1);
874 uspi->s_fshift = 10;
875 uspi->s_sbsize = 2048;
876 super_block_size = 2048;
877 uspi->s_sbbase = 0;
878 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
879 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
880 break;
881
882 case UFS_MOUNT_UFSTYPE_SUNx86:
883 UFSD("ufstype=sunx86\n");
884 uspi->s_fsize = block_size = 1024;
885 uspi->s_fmask = ~(1024 - 1);
886 uspi->s_fshift = 10;
887 uspi->s_sbsize = super_block_size = 2048;
888 uspi->s_sbbase = 0;
889 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
890 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
891 break;
892
893 case UFS_MOUNT_UFSTYPE_OLD:
894 UFSD("ufstype=old\n");
895 uspi->s_fsize = block_size = 1024;
896 uspi->s_fmask = ~(1024 - 1);
897 uspi->s_fshift = 10;
898 uspi->s_sbsize = super_block_size = 2048;
899 uspi->s_sbbase = 0;
900 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
901 if (!(sb->s_flags & MS_RDONLY)) {
902 if (!silent)
903 pr_info("ufstype=old is supported read-only\n");
904 sb->s_flags |= MS_RDONLY;
905 }
906 break;
907
908 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
909 UFSD("ufstype=nextstep\n");
910 uspi->s_fsize = block_size = 1024;
911 uspi->s_fmask = ~(1024 - 1);
912 uspi->s_fshift = 10;
913 uspi->s_sbsize = super_block_size = 2048;
914 uspi->s_sbbase = 0;
915 uspi->s_dirblksize = 1024;
916 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
917 if (!(sb->s_flags & MS_RDONLY)) {
918 if (!silent)
919 pr_info("ufstype=nextstep is supported read-only\n");
920 sb->s_flags |= MS_RDONLY;
921 }
922 break;
923
924 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
925 UFSD("ufstype=nextstep-cd\n");
926 uspi->s_fsize = block_size = 2048;
927 uspi->s_fmask = ~(2048 - 1);
928 uspi->s_fshift = 11;
929 uspi->s_sbsize = super_block_size = 2048;
930 uspi->s_sbbase = 0;
931 uspi->s_dirblksize = 1024;
932 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
933 if (!(sb->s_flags & MS_RDONLY)) {
934 if (!silent)
935 pr_info("ufstype=nextstep-cd is supported read-only\n");
936 sb->s_flags |= MS_RDONLY;
937 }
938 break;
939
940 case UFS_MOUNT_UFSTYPE_OPENSTEP:
941 UFSD("ufstype=openstep\n");
942 uspi->s_fsize = block_size = 1024;
943 uspi->s_fmask = ~(1024 - 1);
944 uspi->s_fshift = 10;
945 uspi->s_sbsize = super_block_size = 2048;
946 uspi->s_sbbase = 0;
947 uspi->s_dirblksize = 1024;
948 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
949 if (!(sb->s_flags & MS_RDONLY)) {
950 if (!silent)
951 pr_info("ufstype=openstep is supported read-only\n");
952 sb->s_flags |= MS_RDONLY;
953 }
954 break;
955
956 case UFS_MOUNT_UFSTYPE_HP:
957 UFSD("ufstype=hp\n");
958 uspi->s_fsize = block_size = 1024;
959 uspi->s_fmask = ~(1024 - 1);
960 uspi->s_fshift = 10;
961 uspi->s_sbsize = super_block_size = 2048;
962 uspi->s_sbbase = 0;
963 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
964 if (!(sb->s_flags & MS_RDONLY)) {
965 if (!silent)
966 pr_info("ufstype=hp is supported read-only\n");
967 sb->s_flags |= MS_RDONLY;
968 }
969 break;
970 default:
971 if (!silent)
972 pr_err("unknown ufstype\n");
973 goto failed;
974 }
975
976 again:
977 if (!sb_set_blocksize(sb, block_size)) {
978 pr_err("failed to set blocksize\n");
979 goto failed;
980 }
981
982 /*
983 * read ufs super block from device
984 */
985
986 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
987
988 if (!ubh)
989 goto failed;
990
991 usb1 = ubh_get_usb_first(uspi);
992 usb2 = ubh_get_usb_second(uspi);
993 usb3 = ubh_get_usb_third(uspi);
994
995 /* Sort out mod used on SunOS 4.1.3 for fs_state */
996 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
997 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
998 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
999 flags &= ~UFS_ST_MASK;
1000 flags |= UFS_ST_SUN;
1001 }
1002
1003 /*
1004 * Check ufs magic number
1005 */
1006 sbi->s_bytesex = BYTESEX_LE;
1007 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1008 case UFS_MAGIC:
1009 case UFS_MAGIC_BW:
1010 case UFS2_MAGIC:
1011 case UFS_MAGIC_LFN:
1012 case UFS_MAGIC_FEA:
1013 case UFS_MAGIC_4GB:
1014 goto magic_found;
1015 }
1016 sbi->s_bytesex = BYTESEX_BE;
1017 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1018 case UFS_MAGIC:
1019 case UFS_MAGIC_BW:
1020 case UFS2_MAGIC:
1021 case UFS_MAGIC_LFN:
1022 case UFS_MAGIC_FEA:
1023 case UFS_MAGIC_4GB:
1024 goto magic_found;
1025 }
1026
1027 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1028 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1029 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1030 && uspi->s_sbbase < 256) {
1031 ubh_brelse_uspi(uspi);
1032 ubh = NULL;
1033 uspi->s_sbbase += 8;
1034 goto again;
1035 }
1036 if (!silent)
1037 pr_err("%s(): bad magic number\n", __func__);
1038 goto failed;
1039
1040 magic_found:
1041 /*
1042 * Check block and fragment sizes
1043 */
1044 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1045 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1046 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1047 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1048 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1049
1050 if (!is_power_of_2(uspi->s_fsize)) {
1051 pr_err("%s(): fragment size %u is not a power of 2\n",
1052 __func__, uspi->s_fsize);
1053 goto failed;
1054 }
1055 if (uspi->s_fsize < 512) {
1056 pr_err("%s(): fragment size %u is too small\n",
1057 __func__, uspi->s_fsize);
1058 goto failed;
1059 }
1060 if (uspi->s_fsize > 4096) {
1061 pr_err("%s(): fragment size %u is too large\n",
1062 __func__, uspi->s_fsize);
1063 goto failed;
1064 }
1065 if (!is_power_of_2(uspi->s_bsize)) {
1066 pr_err("%s(): block size %u is not a power of 2\n",
1067 __func__, uspi->s_bsize);
1068 goto failed;
1069 }
1070 if (uspi->s_bsize < 4096) {
1071 pr_err("%s(): block size %u is too small\n",
1072 __func__, uspi->s_bsize);
1073 goto failed;
1074 }
1075 if (uspi->s_bsize / uspi->s_fsize > 8) {
1076 pr_err("%s(): too many fragments per block (%u)\n",
1077 __func__, uspi->s_bsize / uspi->s_fsize);
1078 goto failed;
1079 }
1080 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1081 ubh_brelse_uspi(uspi);
1082 ubh = NULL;
1083 block_size = uspi->s_fsize;
1084 super_block_size = uspi->s_sbsize;
1085 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1086 goto again;
1087 }
1088
1089 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1090 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1091
1092 /*
1093 * Check, if file system was correctly unmounted.
1094 * If not, make it read only.
1095 */
1096 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1097 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1098 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1099 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1100 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1101 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1102 switch(usb1->fs_clean) {
1103 case UFS_FSCLEAN:
1104 UFSD("fs is clean\n");
1105 break;
1106 case UFS_FSSTABLE:
1107 UFSD("fs is stable\n");
1108 break;
1109 case UFS_FSLOG:
1110 UFSD("fs is logging fs\n");
1111 break;
1112 case UFS_FSOSF1:
1113 UFSD("fs is DEC OSF/1\n");
1114 break;
1115 case UFS_FSACTIVE:
1116 pr_err("%s(): fs is active\n", __func__);
1117 sb->s_flags |= MS_RDONLY;
1118 break;
1119 case UFS_FSBAD:
1120 pr_err("%s(): fs is bad\n", __func__);
1121 sb->s_flags |= MS_RDONLY;
1122 break;
1123 default:
1124 pr_err("%s(): can't grok fs_clean 0x%x\n",
1125 __func__, usb1->fs_clean);
1126 sb->s_flags |= MS_RDONLY;
1127 break;
1128 }
1129 } else {
1130 pr_err("%s(): fs needs fsck\n", __func__);
1131 sb->s_flags |= MS_RDONLY;
1132 }
1133
1134 /*
1135 * Read ufs_super_block into internal data structures
1136 */
1137 sb->s_op = &ufs_super_ops;
1138 sb->s_export_op = &ufs_export_ops;
1139
1140 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1141
1142 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1143 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1144 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1145 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1146 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1147 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1148
1149 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1150 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1151 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1152 } else {
1153 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1154 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1155 }
1156
1157 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1158 /* s_bsize already set */
1159 /* s_fsize already set */
1160 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1161 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1162 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1163 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1164 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1165 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1166 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1167 uspi->s_fshift);
1168 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1169 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1170 /* s_sbsize already set */
1171 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1172 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1173 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1174 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1175 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1176 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1177 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1178 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1179
1180 if (uspi->fs_magic == UFS2_MAGIC)
1181 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1182 else
1183 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1184
1185 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1186 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1187 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1188 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1189 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1190 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1191 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1192 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1193 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1194 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1195 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1196 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1197 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1198 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1199
1200 /*
1201 * Compute another frequently used values
1202 */
1203 uspi->s_fpbmask = uspi->s_fpb - 1;
1204 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1205 uspi->s_apbshift = uspi->s_bshift - 3;
1206 else
1207 uspi->s_apbshift = uspi->s_bshift - 2;
1208
1209 uspi->s_2apbshift = uspi->s_apbshift * 2;
1210 uspi->s_3apbshift = uspi->s_apbshift * 3;
1211 uspi->s_apb = 1 << uspi->s_apbshift;
1212 uspi->s_2apb = 1 << uspi->s_2apbshift;
1213 uspi->s_3apb = 1 << uspi->s_3apbshift;
1214 uspi->s_apbmask = uspi->s_apb - 1;
1215 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1216 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1217 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1218 uspi->s_bpf = uspi->s_fsize << 3;
1219 uspi->s_bpfshift = uspi->s_fshift + 3;
1220 uspi->s_bpfmask = uspi->s_bpf - 1;
1221 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1222 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1223 uspi->s_maxsymlinklen =
1224 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1225
1226 if (uspi->fs_magic == UFS2_MAGIC)
1227 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1228 else
1229 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1230 if (uspi->s_maxsymlinklen > maxsymlen) {
1231 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1232 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1233 uspi->s_maxsymlinklen = maxsymlen;
1234 }
1235 sb->s_max_links = UFS_LINK_MAX;
1236
1237 inode = ufs_iget(sb, UFS_ROOTINO);
1238 if (IS_ERR(inode)) {
1239 ret = PTR_ERR(inode);
1240 goto failed;
1241 }
1242 sb->s_root = d_make_root(inode);
1243 if (!sb->s_root) {
1244 ret = -ENOMEM;
1245 goto failed;
1246 }
1247
1248 ufs_setup_cstotal(sb);
1249 /*
1250 * Read cylinder group structures
1251 */
1252 if (!(sb->s_flags & MS_RDONLY))
1253 if (!ufs_read_cylinder_structures(sb))
1254 goto failed;
1255
1256 UFSD("EXIT\n");
1257 return 0;
1258
1259 failed:
1260 mutex_destroy(&sbi->mutex);
1261 if (ubh)
1262 ubh_brelse_uspi (uspi);
1263 kfree (uspi);
1264 kfree(sbi);
1265 sb->s_fs_info = NULL;
1266 UFSD("EXIT (FAILED)\n");
1267 return ret;
1268
1269 failed_nomem:
1270 UFSD("EXIT (NOMEM)\n");
1271 return -ENOMEM;
1272 }
1273
1274 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1275 {
1276 struct ufs_sb_private_info * uspi;
1277 struct ufs_super_block_first * usb1;
1278 struct ufs_super_block_third * usb3;
1279 unsigned new_mount_opt, ufstype;
1280 unsigned flags;
1281
1282 sync_filesystem(sb);
1283 lock_ufs(sb);
1284 uspi = UFS_SB(sb)->s_uspi;
1285 flags = UFS_SB(sb)->s_flags;
1286 usb1 = ubh_get_usb_first(uspi);
1287 usb3 = ubh_get_usb_third(uspi);
1288
1289 /*
1290 * Allow the "check" option to be passed as a remount option.
1291 * It is not possible to change ufstype option during remount
1292 */
1293 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1294 new_mount_opt = 0;
1295 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1296 if (!ufs_parse_options (data, &new_mount_opt)) {
1297 unlock_ufs(sb);
1298 return -EINVAL;
1299 }
1300 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1301 new_mount_opt |= ufstype;
1302 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1303 pr_err("ufstype can't be changed during remount\n");
1304 unlock_ufs(sb);
1305 return -EINVAL;
1306 }
1307
1308 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1309 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1310 unlock_ufs(sb);
1311 return 0;
1312 }
1313
1314 /*
1315 * fs was mouted as rw, remounting ro
1316 */
1317 if (*mount_flags & MS_RDONLY) {
1318 ufs_put_super_internal(sb);
1319 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1320 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1321 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1322 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1323 ufs_set_fs_state(sb, usb1, usb3,
1324 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1325 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1326 sb->s_flags |= MS_RDONLY;
1327 } else {
1328 /*
1329 * fs was mounted as ro, remounting rw
1330 */
1331 #ifndef CONFIG_UFS_FS_WRITE
1332 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1333 unlock_ufs(sb);
1334 return -EINVAL;
1335 #else
1336 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1337 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1338 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1339 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1340 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1341 pr_err("this ufstype is read-only supported\n");
1342 unlock_ufs(sb);
1343 return -EINVAL;
1344 }
1345 if (!ufs_read_cylinder_structures(sb)) {
1346 pr_err("failed during remounting\n");
1347 unlock_ufs(sb);
1348 return -EPERM;
1349 }
1350 sb->s_flags &= ~MS_RDONLY;
1351 #endif
1352 }
1353 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1354 unlock_ufs(sb);
1355 return 0;
1356 }
1357
1358 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1359 {
1360 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1361 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1362 const struct match_token *tp = tokens;
1363
1364 while (tp->token != Opt_onerror_panic && tp->token != mval)
1365 ++tp;
1366 BUG_ON(tp->token == Opt_onerror_panic);
1367 seq_printf(seq, ",%s", tp->pattern);
1368
1369 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1370 while (tp->token != Opt_err && tp->token != mval)
1371 ++tp;
1372 BUG_ON(tp->token == Opt_err);
1373 seq_printf(seq, ",%s", tp->pattern);
1374
1375 return 0;
1376 }
1377
1378 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1379 {
1380 struct super_block *sb = dentry->d_sb;
1381 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1382 unsigned flags = UFS_SB(sb)->s_flags;
1383 struct ufs_super_block_third *usb3;
1384 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1385
1386 lock_ufs(sb);
1387
1388 usb3 = ubh_get_usb_third(uspi);
1389
1390 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1391 buf->f_type = UFS2_MAGIC;
1392 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1393 } else {
1394 buf->f_type = UFS_MAGIC;
1395 buf->f_blocks = uspi->s_dsize;
1396 }
1397 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1398 uspi->cs_total.cs_nffree;
1399 buf->f_ffree = uspi->cs_total.cs_nifree;
1400 buf->f_bsize = sb->s_blocksize;
1401 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1402 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1403 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1404 buf->f_namelen = UFS_MAXNAMLEN;
1405 buf->f_fsid.val[0] = (u32)id;
1406 buf->f_fsid.val[1] = (u32)(id >> 32);
1407
1408 unlock_ufs(sb);
1409
1410 return 0;
1411 }
1412
1413 static struct kmem_cache * ufs_inode_cachep;
1414
1415 static struct inode *ufs_alloc_inode(struct super_block *sb)
1416 {
1417 struct ufs_inode_info *ei;
1418 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1419 if (!ei)
1420 return NULL;
1421 ei->vfs_inode.i_version = 1;
1422 return &ei->vfs_inode;
1423 }
1424
1425 static void ufs_i_callback(struct rcu_head *head)
1426 {
1427 struct inode *inode = container_of(head, struct inode, i_rcu);
1428 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1429 }
1430
1431 static void ufs_destroy_inode(struct inode *inode)
1432 {
1433 call_rcu(&inode->i_rcu, ufs_i_callback);
1434 }
1435
1436 static void init_once(void *foo)
1437 {
1438 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1439
1440 inode_init_once(&ei->vfs_inode);
1441 }
1442
1443 static int __init init_inodecache(void)
1444 {
1445 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1446 sizeof(struct ufs_inode_info),
1447 0, (SLAB_RECLAIM_ACCOUNT|
1448 SLAB_MEM_SPREAD),
1449 init_once);
1450 if (ufs_inode_cachep == NULL)
1451 return -ENOMEM;
1452 return 0;
1453 }
1454
1455 static void destroy_inodecache(void)
1456 {
1457 /*
1458 * Make sure all delayed rcu free inodes are flushed before we
1459 * destroy cache.
1460 */
1461 rcu_barrier();
1462 kmem_cache_destroy(ufs_inode_cachep);
1463 }
1464
1465 static const struct super_operations ufs_super_ops = {
1466 .alloc_inode = ufs_alloc_inode,
1467 .destroy_inode = ufs_destroy_inode,
1468 .write_inode = ufs_write_inode,
1469 .evict_inode = ufs_evict_inode,
1470 .put_super = ufs_put_super,
1471 .sync_fs = ufs_sync_fs,
1472 .statfs = ufs_statfs,
1473 .remount_fs = ufs_remount,
1474 .show_options = ufs_show_options,
1475 };
1476
1477 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1478 int flags, const char *dev_name, void *data)
1479 {
1480 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1481 }
1482
1483 static struct file_system_type ufs_fs_type = {
1484 .owner = THIS_MODULE,
1485 .name = "ufs",
1486 .mount = ufs_mount,
1487 .kill_sb = kill_block_super,
1488 .fs_flags = FS_REQUIRES_DEV,
1489 };
1490 MODULE_ALIAS_FS("ufs");
1491
1492 static int __init init_ufs_fs(void)
1493 {
1494 int err = init_inodecache();
1495 if (err)
1496 goto out1;
1497 err = register_filesystem(&ufs_fs_type);
1498 if (err)
1499 goto out;
1500 return 0;
1501 out:
1502 destroy_inodecache();
1503 out1:
1504 return err;
1505 }
1506
1507 static void __exit exit_ufs_fs(void)
1508 {
1509 unregister_filesystem(&ufs_fs_type);
1510 destroy_inodecache();
1511 }
1512
1513 module_init(init_ufs_fs)
1514 module_exit(exit_ufs_fs)
1515 MODULE_LICENSE("GPL");
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