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Merge branches 'for-4.0/upstream-fixes', 'for-4.1/genius', 'for-4.1/huion-uclogic...
[mirror_ubuntu-artful-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 struct ufs_sb_info *sbi = UFS_SB(sb);
99
100 mutex_lock(&sbi->mutex);
101 sbi->mutex_owner = current;
102 }
103
104 void unlock_ufs(struct super_block *sb)
105 {
106 struct ufs_sb_info *sbi = UFS_SB(sb);
107
108 sbi->mutex_owner = NULL;
109 mutex_unlock(&sbi->mutex);
110 }
111
112 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
113 {
114 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
115 struct inode *inode;
116
117 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
118 return ERR_PTR(-ESTALE);
119
120 inode = ufs_iget(sb, ino);
121 if (IS_ERR(inode))
122 return ERR_CAST(inode);
123 if (generation && inode->i_generation != generation) {
124 iput(inode);
125 return ERR_PTR(-ESTALE);
126 }
127 return inode;
128 }
129
130 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
131 int fh_len, int fh_type)
132 {
133 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
134 }
135
136 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
137 int fh_len, int fh_type)
138 {
139 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
140 }
141
142 static struct dentry *ufs_get_parent(struct dentry *child)
143 {
144 struct qstr dot_dot = QSTR_INIT("..", 2);
145 ino_t ino;
146
147 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
148 if (!ino)
149 return ERR_PTR(-ENOENT);
150 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
151 }
152
153 static const struct export_operations ufs_export_ops = {
154 .fh_to_dentry = ufs_fh_to_dentry,
155 .fh_to_parent = ufs_fh_to_parent,
156 .get_parent = ufs_get_parent,
157 };
158
159 #ifdef CONFIG_UFS_DEBUG
160 /*
161 * Print contents of ufs_super_block, useful for debugging
162 */
163 static void ufs_print_super_stuff(struct super_block *sb,
164 struct ufs_super_block_first *usb1,
165 struct ufs_super_block_second *usb2,
166 struct ufs_super_block_third *usb3)
167 {
168 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
169
170 pr_debug("ufs_print_super_stuff\n");
171 pr_debug(" magic: 0x%x\n", magic);
172 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
173 pr_debug(" fs_size: %llu\n", (unsigned long long)
174 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
175 pr_debug(" fs_dsize: %llu\n", (unsigned long long)
176 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
177 pr_debug(" bsize: %u\n",
178 fs32_to_cpu(sb, usb1->fs_bsize));
179 pr_debug(" fsize: %u\n",
180 fs32_to_cpu(sb, usb1->fs_fsize));
181 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
182 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
183 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
184 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
185 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
186 pr_debug(" cs_nbfree(No of free blocks): %llu\n",
187 (unsigned long long)
188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
189 pr_info(" cs_nifree(Num of free inodes): %llu\n",
190 (unsigned long long)
191 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
192 pr_info(" cs_nffree(Num of free frags): %llu\n",
193 (unsigned long long)
194 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
195 pr_info(" fs_maxsymlinklen: %u\n",
196 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
197 } else {
198 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
199 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
200 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
201 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
202 pr_debug(" cgoffset: %u\n",
203 fs32_to_cpu(sb, usb1->fs_cgoffset));
204 pr_debug(" ~cgmask: 0x%x\n",
205 ~fs32_to_cpu(sb, usb1->fs_cgmask));
206 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
207 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
208 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
209 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
210 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
211 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
212 pr_debug(" fragshift: %u\n",
213 fs32_to_cpu(sb, usb1->fs_fragshift));
214 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
215 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
216 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
217 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
218 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
219 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
220 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
221 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
222 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
223 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
224 pr_debug(" fstodb: %u\n",
225 fs32_to_cpu(sb, usb1->fs_fsbtodb));
226 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
227 pr_debug(" ndir %u\n",
228 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
229 pr_debug(" nifree %u\n",
230 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
231 pr_debug(" nbfree %u\n",
232 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
233 pr_debug(" nffree %u\n",
234 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
235 }
236 pr_debug("\n");
237 }
238
239 /*
240 * Print contents of ufs_cylinder_group, useful for debugging
241 */
242 static void ufs_print_cylinder_stuff(struct super_block *sb,
243 struct ufs_cylinder_group *cg)
244 {
245 pr_debug("\nufs_print_cylinder_stuff\n");
246 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
247 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
248 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
249 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
250 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
251 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
252 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
253 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
254 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
255 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
256 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
257 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
258 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
259 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
260 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
261 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
262 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
263 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
264 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
265 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
266 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
267 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
268 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
269 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
270 pr_debug(" clustersumoff %u\n",
271 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
272 pr_debug(" clusteroff %u\n",
273 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
274 pr_debug(" nclusterblks %u\n",
275 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
276 pr_debug("\n");
277 }
278 #else
279 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
280 # define ufs_print_cylinder_stuff(sb, cg) /**/
281 #endif /* CONFIG_UFS_DEBUG */
282
283 static const struct super_operations ufs_super_ops;
284
285 void ufs_error (struct super_block * sb, const char * function,
286 const char * fmt, ...)
287 {
288 struct ufs_sb_private_info * uspi;
289 struct ufs_super_block_first * usb1;
290 struct va_format vaf;
291 va_list args;
292
293 uspi = UFS_SB(sb)->s_uspi;
294 usb1 = ubh_get_usb_first(uspi);
295
296 if (!(sb->s_flags & MS_RDONLY)) {
297 usb1->fs_clean = UFS_FSBAD;
298 ubh_mark_buffer_dirty(USPI_UBH(uspi));
299 ufs_mark_sb_dirty(sb);
300 sb->s_flags |= MS_RDONLY;
301 }
302 va_start(args, fmt);
303 vaf.fmt = fmt;
304 vaf.va = &args;
305 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
306 case UFS_MOUNT_ONERROR_PANIC:
307 panic("panic (device %s): %s: %pV\n",
308 sb->s_id, function, &vaf);
309
310 case UFS_MOUNT_ONERROR_LOCK:
311 case UFS_MOUNT_ONERROR_UMOUNT:
312 case UFS_MOUNT_ONERROR_REPAIR:
313 pr_crit("error (device %s): %s: %pV\n",
314 sb->s_id, function, &vaf);
315 }
316 va_end(args);
317 }
318
319 void ufs_panic (struct super_block * sb, const char * function,
320 const char * fmt, ...)
321 {
322 struct ufs_sb_private_info * uspi;
323 struct ufs_super_block_first * usb1;
324 struct va_format vaf;
325 va_list args;
326
327 uspi = UFS_SB(sb)->s_uspi;
328 usb1 = ubh_get_usb_first(uspi);
329
330 if (!(sb->s_flags & MS_RDONLY)) {
331 usb1->fs_clean = UFS_FSBAD;
332 ubh_mark_buffer_dirty(USPI_UBH(uspi));
333 ufs_mark_sb_dirty(sb);
334 }
335 va_start(args, fmt);
336 vaf.fmt = fmt;
337 vaf.va = &args;
338 sb->s_flags |= MS_RDONLY;
339 pr_crit("panic (device %s): %s: %pV\n",
340 sb->s_id, function, &vaf);
341 va_end(args);
342 }
343
344 void ufs_warning (struct super_block * sb, const char * function,
345 const char * fmt, ...)
346 {
347 struct va_format vaf;
348 va_list args;
349
350 va_start(args, fmt);
351 vaf.fmt = fmt;
352 vaf.va = &args;
353 pr_warn("(device %s): %s: %pV\n",
354 sb->s_id, function, &vaf);
355 va_end(args);
356 }
357
358 enum {
359 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
360 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
361 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
362 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
363 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
364 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
365 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
366 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
367 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
368 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
369 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
370 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
371 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
372 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
373 Opt_err
374 };
375
376 static const match_table_t tokens = {
377 {Opt_type_old, "ufstype=old"},
378 {Opt_type_sunx86, "ufstype=sunx86"},
379 {Opt_type_sun, "ufstype=sun"},
380 {Opt_type_sunos, "ufstype=sunos"},
381 {Opt_type_44bsd, "ufstype=44bsd"},
382 {Opt_type_ufs2, "ufstype=ufs2"},
383 {Opt_type_ufs2, "ufstype=5xbsd"},
384 {Opt_type_hp, "ufstype=hp"},
385 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
386 {Opt_type_nextstep, "ufstype=nextstep"},
387 {Opt_type_openstep, "ufstype=openstep"},
388 /*end of possible ufs types */
389 {Opt_onerror_panic, "onerror=panic"},
390 {Opt_onerror_lock, "onerror=lock"},
391 {Opt_onerror_umount, "onerror=umount"},
392 {Opt_onerror_repair, "onerror=repair"},
393 {Opt_err, NULL}
394 };
395
396 static int ufs_parse_options (char * options, unsigned * mount_options)
397 {
398 char * p;
399
400 UFSD("ENTER\n");
401
402 if (!options)
403 return 1;
404
405 while ((p = strsep(&options, ",")) != NULL) {
406 substring_t args[MAX_OPT_ARGS];
407 int token;
408 if (!*p)
409 continue;
410
411 token = match_token(p, tokens, args);
412 switch (token) {
413 case Opt_type_old:
414 ufs_clear_opt (*mount_options, UFSTYPE);
415 ufs_set_opt (*mount_options, UFSTYPE_OLD);
416 break;
417 case Opt_type_sunx86:
418 ufs_clear_opt (*mount_options, UFSTYPE);
419 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
420 break;
421 case Opt_type_sun:
422 ufs_clear_opt (*mount_options, UFSTYPE);
423 ufs_set_opt (*mount_options, UFSTYPE_SUN);
424 break;
425 case Opt_type_sunos:
426 ufs_clear_opt(*mount_options, UFSTYPE);
427 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
428 break;
429 case Opt_type_44bsd:
430 ufs_clear_opt (*mount_options, UFSTYPE);
431 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
432 break;
433 case Opt_type_ufs2:
434 ufs_clear_opt(*mount_options, UFSTYPE);
435 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
436 break;
437 case Opt_type_hp:
438 ufs_clear_opt (*mount_options, UFSTYPE);
439 ufs_set_opt (*mount_options, UFSTYPE_HP);
440 break;
441 case Opt_type_nextstepcd:
442 ufs_clear_opt (*mount_options, UFSTYPE);
443 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
444 break;
445 case Opt_type_nextstep:
446 ufs_clear_opt (*mount_options, UFSTYPE);
447 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
448 break;
449 case Opt_type_openstep:
450 ufs_clear_opt (*mount_options, UFSTYPE);
451 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
452 break;
453 case Opt_onerror_panic:
454 ufs_clear_opt (*mount_options, ONERROR);
455 ufs_set_opt (*mount_options, ONERROR_PANIC);
456 break;
457 case Opt_onerror_lock:
458 ufs_clear_opt (*mount_options, ONERROR);
459 ufs_set_opt (*mount_options, ONERROR_LOCK);
460 break;
461 case Opt_onerror_umount:
462 ufs_clear_opt (*mount_options, ONERROR);
463 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
464 break;
465 case Opt_onerror_repair:
466 pr_err("Unable to do repair on error, will lock lock instead\n");
467 ufs_clear_opt (*mount_options, ONERROR);
468 ufs_set_opt (*mount_options, ONERROR_REPAIR);
469 break;
470 default:
471 pr_err("Invalid option: \"%s\" or missing value\n", p);
472 return 0;
473 }
474 }
475 return 1;
476 }
477
478 /*
479 * Different types of UFS hold fs_cstotal in different
480 * places, and use different data structure for it.
481 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
482 */
483 static void ufs_setup_cstotal(struct super_block *sb)
484 {
485 struct ufs_sb_info *sbi = UFS_SB(sb);
486 struct ufs_sb_private_info *uspi = sbi->s_uspi;
487 struct ufs_super_block_first *usb1;
488 struct ufs_super_block_second *usb2;
489 struct ufs_super_block_third *usb3;
490 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
491
492 UFSD("ENTER, mtype=%u\n", mtype);
493 usb1 = ubh_get_usb_first(uspi);
494 usb2 = ubh_get_usb_second(uspi);
495 usb3 = ubh_get_usb_third(uspi);
496
497 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
498 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
499 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
500 /*we have statistic in different place, then usual*/
501 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
502 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
503 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
504 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
505 } else {
506 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
507 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
508 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
509 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
510 }
511 UFSD("EXIT\n");
512 }
513
514 /*
515 * Read on-disk structures associated with cylinder groups
516 */
517 static int ufs_read_cylinder_structures(struct super_block *sb)
518 {
519 struct ufs_sb_info *sbi = UFS_SB(sb);
520 struct ufs_sb_private_info *uspi = sbi->s_uspi;
521 struct ufs_buffer_head * ubh;
522 unsigned char * base, * space;
523 unsigned size, blks, i;
524
525 UFSD("ENTER\n");
526
527 /*
528 * Read cs structures from (usually) first data block
529 * on the device.
530 */
531 size = uspi->s_cssize;
532 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
533 base = space = kmalloc(size, GFP_NOFS);
534 if (!base)
535 goto failed;
536 sbi->s_csp = (struct ufs_csum *)space;
537 for (i = 0; i < blks; i += uspi->s_fpb) {
538 size = uspi->s_bsize;
539 if (i + uspi->s_fpb > blks)
540 size = (blks - i) * uspi->s_fsize;
541
542 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
543
544 if (!ubh)
545 goto failed;
546
547 ubh_ubhcpymem (space, ubh, size);
548
549 space += size;
550 ubh_brelse (ubh);
551 ubh = NULL;
552 }
553
554 /*
555 * Read cylinder group (we read only first fragment from block
556 * at this time) and prepare internal data structures for cg caching.
557 */
558 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
559 goto failed;
560 for (i = 0; i < uspi->s_ncg; i++)
561 sbi->s_ucg[i] = NULL;
562 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
563 sbi->s_ucpi[i] = NULL;
564 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
565 }
566 for (i = 0; i < uspi->s_ncg; i++) {
567 UFSD("read cg %u\n", i);
568 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
569 goto failed;
570 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
571 goto failed;
572
573 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
574 }
575 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
576 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
577 goto failed;
578 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
579 }
580 sbi->s_cg_loaded = 0;
581 UFSD("EXIT\n");
582 return 1;
583
584 failed:
585 kfree (base);
586 if (sbi->s_ucg) {
587 for (i = 0; i < uspi->s_ncg; i++)
588 if (sbi->s_ucg[i])
589 brelse (sbi->s_ucg[i]);
590 kfree (sbi->s_ucg);
591 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
592 kfree (sbi->s_ucpi[i]);
593 }
594 UFSD("EXIT (FAILED)\n");
595 return 0;
596 }
597
598 /*
599 * Sync our internal copy of fs_cstotal with disk
600 */
601 static void ufs_put_cstotal(struct super_block *sb)
602 {
603 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
604 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
605 struct ufs_super_block_first *usb1;
606 struct ufs_super_block_second *usb2;
607 struct ufs_super_block_third *usb3;
608
609 UFSD("ENTER\n");
610 usb1 = ubh_get_usb_first(uspi);
611 usb2 = ubh_get_usb_second(uspi);
612 usb3 = ubh_get_usb_third(uspi);
613
614 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
615 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
616 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
617 /*we have statistic in different place, then usual*/
618 usb2->fs_un.fs_u2.cs_ndir =
619 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
620 usb2->fs_un.fs_u2.cs_nbfree =
621 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
622 usb3->fs_un1.fs_u2.cs_nifree =
623 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
624 usb3->fs_un1.fs_u2.cs_nffree =
625 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
626 } else {
627 usb1->fs_cstotal.cs_ndir =
628 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
629 usb1->fs_cstotal.cs_nbfree =
630 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
631 usb1->fs_cstotal.cs_nifree =
632 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
633 usb1->fs_cstotal.cs_nffree =
634 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
635 }
636 ubh_mark_buffer_dirty(USPI_UBH(uspi));
637 ufs_print_super_stuff(sb, usb1, usb2, usb3);
638 UFSD("EXIT\n");
639 }
640
641 /**
642 * ufs_put_super_internal() - put on-disk intrenal structures
643 * @sb: pointer to super_block structure
644 * Put on-disk structures associated with cylinder groups
645 * and write them back to disk, also update cs_total on disk
646 */
647 static void ufs_put_super_internal(struct super_block *sb)
648 {
649 struct ufs_sb_info *sbi = UFS_SB(sb);
650 struct ufs_sb_private_info *uspi = sbi->s_uspi;
651 struct ufs_buffer_head * ubh;
652 unsigned char * base, * space;
653 unsigned blks, size, i;
654
655
656 UFSD("ENTER\n");
657
658 ufs_put_cstotal(sb);
659 size = uspi->s_cssize;
660 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
661 base = space = (char*) sbi->s_csp;
662 for (i = 0; i < blks; i += uspi->s_fpb) {
663 size = uspi->s_bsize;
664 if (i + uspi->s_fpb > blks)
665 size = (blks - i) * uspi->s_fsize;
666
667 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
668
669 ubh_memcpyubh (ubh, space, size);
670 space += size;
671 ubh_mark_buffer_uptodate (ubh, 1);
672 ubh_mark_buffer_dirty (ubh);
673 ubh_brelse (ubh);
674 }
675 for (i = 0; i < sbi->s_cg_loaded; i++) {
676 ufs_put_cylinder (sb, i);
677 kfree (sbi->s_ucpi[i]);
678 }
679 for (; i < UFS_MAX_GROUP_LOADED; i++)
680 kfree (sbi->s_ucpi[i]);
681 for (i = 0; i < uspi->s_ncg; i++)
682 brelse (sbi->s_ucg[i]);
683 kfree (sbi->s_ucg);
684 kfree (base);
685
686 UFSD("EXIT\n");
687 }
688
689 static int ufs_sync_fs(struct super_block *sb, int wait)
690 {
691 struct ufs_sb_private_info * uspi;
692 struct ufs_super_block_first * usb1;
693 struct ufs_super_block_third * usb3;
694 unsigned flags;
695
696 lock_ufs(sb);
697
698 UFSD("ENTER\n");
699
700 flags = UFS_SB(sb)->s_flags;
701 uspi = UFS_SB(sb)->s_uspi;
702 usb1 = ubh_get_usb_first(uspi);
703 usb3 = ubh_get_usb_third(uspi);
704
705 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
706 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
707 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
708 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
709 ufs_set_fs_state(sb, usb1, usb3,
710 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
711 ufs_put_cstotal(sb);
712
713 UFSD("EXIT\n");
714 unlock_ufs(sb);
715
716 return 0;
717 }
718
719 static void delayed_sync_fs(struct work_struct *work)
720 {
721 struct ufs_sb_info *sbi;
722
723 sbi = container_of(work, struct ufs_sb_info, sync_work.work);
724
725 spin_lock(&sbi->work_lock);
726 sbi->work_queued = 0;
727 spin_unlock(&sbi->work_lock);
728
729 ufs_sync_fs(sbi->sb, 1);
730 }
731
732 void ufs_mark_sb_dirty(struct super_block *sb)
733 {
734 struct ufs_sb_info *sbi = UFS_SB(sb);
735 unsigned long delay;
736
737 spin_lock(&sbi->work_lock);
738 if (!sbi->work_queued) {
739 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
740 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
741 sbi->work_queued = 1;
742 }
743 spin_unlock(&sbi->work_lock);
744 }
745
746 static void ufs_put_super(struct super_block *sb)
747 {
748 struct ufs_sb_info * sbi = UFS_SB(sb);
749
750 UFSD("ENTER\n");
751
752 if (!(sb->s_flags & MS_RDONLY))
753 ufs_put_super_internal(sb);
754 cancel_delayed_work_sync(&sbi->sync_work);
755
756 ubh_brelse_uspi (sbi->s_uspi);
757 kfree (sbi->s_uspi);
758 mutex_destroy(&sbi->mutex);
759 kfree (sbi);
760 sb->s_fs_info = NULL;
761 UFSD("EXIT\n");
762 return;
763 }
764
765 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
766 {
767 struct ufs_sb_info * sbi;
768 struct ufs_sb_private_info * uspi;
769 struct ufs_super_block_first * usb1;
770 struct ufs_super_block_second * usb2;
771 struct ufs_super_block_third * usb3;
772 struct ufs_buffer_head * ubh;
773 struct inode *inode;
774 unsigned block_size, super_block_size;
775 unsigned flags;
776 unsigned super_block_offset;
777 unsigned maxsymlen;
778 int ret = -EINVAL;
779
780 uspi = NULL;
781 ubh = NULL;
782 flags = 0;
783
784 UFSD("ENTER\n");
785
786 #ifndef CONFIG_UFS_FS_WRITE
787 if (!(sb->s_flags & MS_RDONLY)) {
788 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
789 return -EROFS;
790 }
791 #endif
792
793 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
794 if (!sbi)
795 goto failed_nomem;
796 sb->s_fs_info = sbi;
797 sbi->sb = sb;
798
799 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
800
801 mutex_init(&sbi->mutex);
802 spin_lock_init(&sbi->work_lock);
803 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
804 /*
805 * Set default mount options
806 * Parse mount options
807 */
808 sbi->s_mount_opt = 0;
809 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
810 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
811 pr_err("wrong mount options\n");
812 goto failed;
813 }
814 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
815 if (!silent)
816 pr_err("You didn't specify the type of your ufs filesystem\n\n"
817 "mount -t ufs -o ufstype="
818 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
819 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
820 "default is ufstype=old\n");
821 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
822 }
823
824 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
825 sbi->s_uspi = uspi;
826 if (!uspi)
827 goto failed;
828 uspi->s_dirblksize = UFS_SECTOR_SIZE;
829 super_block_offset=UFS_SBLOCK;
830
831 /* Keep 2Gig file limit. Some UFS variants need to override
832 this but as I don't know which I'll let those in the know loosen
833 the rules */
834 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
835 case UFS_MOUNT_UFSTYPE_44BSD:
836 UFSD("ufstype=44bsd\n");
837 uspi->s_fsize = block_size = 512;
838 uspi->s_fmask = ~(512 - 1);
839 uspi->s_fshift = 9;
840 uspi->s_sbsize = super_block_size = 1536;
841 uspi->s_sbbase = 0;
842 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
843 break;
844 case UFS_MOUNT_UFSTYPE_UFS2:
845 UFSD("ufstype=ufs2\n");
846 super_block_offset=SBLOCK_UFS2;
847 uspi->s_fsize = block_size = 512;
848 uspi->s_fmask = ~(512 - 1);
849 uspi->s_fshift = 9;
850 uspi->s_sbsize = super_block_size = 1536;
851 uspi->s_sbbase = 0;
852 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
853 break;
854
855 case UFS_MOUNT_UFSTYPE_SUN:
856 UFSD("ufstype=sun\n");
857 uspi->s_fsize = block_size = 1024;
858 uspi->s_fmask = ~(1024 - 1);
859 uspi->s_fshift = 10;
860 uspi->s_sbsize = super_block_size = 2048;
861 uspi->s_sbbase = 0;
862 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
863 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
864 break;
865
866 case UFS_MOUNT_UFSTYPE_SUNOS:
867 UFSD("ufstype=sunos\n");
868 uspi->s_fsize = block_size = 1024;
869 uspi->s_fmask = ~(1024 - 1);
870 uspi->s_fshift = 10;
871 uspi->s_sbsize = 2048;
872 super_block_size = 2048;
873 uspi->s_sbbase = 0;
874 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
875 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
876 break;
877
878 case UFS_MOUNT_UFSTYPE_SUNx86:
879 UFSD("ufstype=sunx86\n");
880 uspi->s_fsize = block_size = 1024;
881 uspi->s_fmask = ~(1024 - 1);
882 uspi->s_fshift = 10;
883 uspi->s_sbsize = super_block_size = 2048;
884 uspi->s_sbbase = 0;
885 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
886 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
887 break;
888
889 case UFS_MOUNT_UFSTYPE_OLD:
890 UFSD("ufstype=old\n");
891 uspi->s_fsize = block_size = 1024;
892 uspi->s_fmask = ~(1024 - 1);
893 uspi->s_fshift = 10;
894 uspi->s_sbsize = super_block_size = 2048;
895 uspi->s_sbbase = 0;
896 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
897 if (!(sb->s_flags & MS_RDONLY)) {
898 if (!silent)
899 pr_info("ufstype=old is supported read-only\n");
900 sb->s_flags |= MS_RDONLY;
901 }
902 break;
903
904 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
905 UFSD("ufstype=nextstep\n");
906 uspi->s_fsize = block_size = 1024;
907 uspi->s_fmask = ~(1024 - 1);
908 uspi->s_fshift = 10;
909 uspi->s_sbsize = super_block_size = 2048;
910 uspi->s_sbbase = 0;
911 uspi->s_dirblksize = 1024;
912 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
913 if (!(sb->s_flags & MS_RDONLY)) {
914 if (!silent)
915 pr_info("ufstype=nextstep is supported read-only\n");
916 sb->s_flags |= MS_RDONLY;
917 }
918 break;
919
920 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
921 UFSD("ufstype=nextstep-cd\n");
922 uspi->s_fsize = block_size = 2048;
923 uspi->s_fmask = ~(2048 - 1);
924 uspi->s_fshift = 11;
925 uspi->s_sbsize = super_block_size = 2048;
926 uspi->s_sbbase = 0;
927 uspi->s_dirblksize = 1024;
928 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
929 if (!(sb->s_flags & MS_RDONLY)) {
930 if (!silent)
931 pr_info("ufstype=nextstep-cd is supported read-only\n");
932 sb->s_flags |= MS_RDONLY;
933 }
934 break;
935
936 case UFS_MOUNT_UFSTYPE_OPENSTEP:
937 UFSD("ufstype=openstep\n");
938 uspi->s_fsize = block_size = 1024;
939 uspi->s_fmask = ~(1024 - 1);
940 uspi->s_fshift = 10;
941 uspi->s_sbsize = super_block_size = 2048;
942 uspi->s_sbbase = 0;
943 uspi->s_dirblksize = 1024;
944 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
945 if (!(sb->s_flags & MS_RDONLY)) {
946 if (!silent)
947 pr_info("ufstype=openstep is supported read-only\n");
948 sb->s_flags |= MS_RDONLY;
949 }
950 break;
951
952 case UFS_MOUNT_UFSTYPE_HP:
953 UFSD("ufstype=hp\n");
954 uspi->s_fsize = block_size = 1024;
955 uspi->s_fmask = ~(1024 - 1);
956 uspi->s_fshift = 10;
957 uspi->s_sbsize = super_block_size = 2048;
958 uspi->s_sbbase = 0;
959 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
960 if (!(sb->s_flags & MS_RDONLY)) {
961 if (!silent)
962 pr_info("ufstype=hp is supported read-only\n");
963 sb->s_flags |= MS_RDONLY;
964 }
965 break;
966 default:
967 if (!silent)
968 pr_err("unknown ufstype\n");
969 goto failed;
970 }
971
972 again:
973 if (!sb_set_blocksize(sb, block_size)) {
974 pr_err("failed to set blocksize\n");
975 goto failed;
976 }
977
978 /*
979 * read ufs super block from device
980 */
981
982 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
983
984 if (!ubh)
985 goto failed;
986
987 usb1 = ubh_get_usb_first(uspi);
988 usb2 = ubh_get_usb_second(uspi);
989 usb3 = ubh_get_usb_third(uspi);
990
991 /* Sort out mod used on SunOS 4.1.3 for fs_state */
992 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
993 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
994 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
995 flags &= ~UFS_ST_MASK;
996 flags |= UFS_ST_SUN;
997 }
998
999 /*
1000 * Check ufs magic number
1001 */
1002 sbi->s_bytesex = BYTESEX_LE;
1003 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1004 case UFS_MAGIC:
1005 case UFS_MAGIC_BW:
1006 case UFS2_MAGIC:
1007 case UFS_MAGIC_LFN:
1008 case UFS_MAGIC_FEA:
1009 case UFS_MAGIC_4GB:
1010 goto magic_found;
1011 }
1012 sbi->s_bytesex = BYTESEX_BE;
1013 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1014 case UFS_MAGIC:
1015 case UFS_MAGIC_BW:
1016 case UFS2_MAGIC:
1017 case UFS_MAGIC_LFN:
1018 case UFS_MAGIC_FEA:
1019 case UFS_MAGIC_4GB:
1020 goto magic_found;
1021 }
1022
1023 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1024 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1025 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1026 && uspi->s_sbbase < 256) {
1027 ubh_brelse_uspi(uspi);
1028 ubh = NULL;
1029 uspi->s_sbbase += 8;
1030 goto again;
1031 }
1032 if (!silent)
1033 pr_err("%s(): bad magic number\n", __func__);
1034 goto failed;
1035
1036 magic_found:
1037 /*
1038 * Check block and fragment sizes
1039 */
1040 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1041 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1042 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1043 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1044 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1045
1046 if (!is_power_of_2(uspi->s_fsize)) {
1047 pr_err("%s(): fragment size %u is not a power of 2\n",
1048 __func__, uspi->s_fsize);
1049 goto failed;
1050 }
1051 if (uspi->s_fsize < 512) {
1052 pr_err("%s(): fragment size %u is too small\n",
1053 __func__, uspi->s_fsize);
1054 goto failed;
1055 }
1056 if (uspi->s_fsize > 4096) {
1057 pr_err("%s(): fragment size %u is too large\n",
1058 __func__, uspi->s_fsize);
1059 goto failed;
1060 }
1061 if (!is_power_of_2(uspi->s_bsize)) {
1062 pr_err("%s(): block size %u is not a power of 2\n",
1063 __func__, uspi->s_bsize);
1064 goto failed;
1065 }
1066 if (uspi->s_bsize < 4096) {
1067 pr_err("%s(): block size %u is too small\n",
1068 __func__, uspi->s_bsize);
1069 goto failed;
1070 }
1071 if (uspi->s_bsize / uspi->s_fsize > 8) {
1072 pr_err("%s(): too many fragments per block (%u)\n",
1073 __func__, uspi->s_bsize / uspi->s_fsize);
1074 goto failed;
1075 }
1076 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1077 ubh_brelse_uspi(uspi);
1078 ubh = NULL;
1079 block_size = uspi->s_fsize;
1080 super_block_size = uspi->s_sbsize;
1081 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1082 goto again;
1083 }
1084
1085 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1086 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1087
1088 /*
1089 * Check, if file system was correctly unmounted.
1090 * If not, make it read only.
1091 */
1092 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1093 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1094 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1095 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1096 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1097 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1098 switch(usb1->fs_clean) {
1099 case UFS_FSCLEAN:
1100 UFSD("fs is clean\n");
1101 break;
1102 case UFS_FSSTABLE:
1103 UFSD("fs is stable\n");
1104 break;
1105 case UFS_FSLOG:
1106 UFSD("fs is logging fs\n");
1107 break;
1108 case UFS_FSOSF1:
1109 UFSD("fs is DEC OSF/1\n");
1110 break;
1111 case UFS_FSACTIVE:
1112 pr_err("%s(): fs is active\n", __func__);
1113 sb->s_flags |= MS_RDONLY;
1114 break;
1115 case UFS_FSBAD:
1116 pr_err("%s(): fs is bad\n", __func__);
1117 sb->s_flags |= MS_RDONLY;
1118 break;
1119 default:
1120 pr_err("%s(): can't grok fs_clean 0x%x\n",
1121 __func__, usb1->fs_clean);
1122 sb->s_flags |= MS_RDONLY;
1123 break;
1124 }
1125 } else {
1126 pr_err("%s(): fs needs fsck\n", __func__);
1127 sb->s_flags |= MS_RDONLY;
1128 }
1129
1130 /*
1131 * Read ufs_super_block into internal data structures
1132 */
1133 sb->s_op = &ufs_super_ops;
1134 sb->s_export_op = &ufs_export_ops;
1135
1136 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1137
1138 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1139 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1140 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1141 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1142 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1143 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1144
1145 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1146 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1147 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1148 } else {
1149 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1150 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1151 }
1152
1153 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1154 /* s_bsize already set */
1155 /* s_fsize already set */
1156 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1157 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1158 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1159 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1160 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1161 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1162 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1163 uspi->s_fshift);
1164 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1165 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1166 /* s_sbsize already set */
1167 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1168 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1169 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1170 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1171 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1172 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1173 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1174 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1175
1176 if (uspi->fs_magic == UFS2_MAGIC)
1177 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1178 else
1179 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1180
1181 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1182 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1183 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1184 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1185 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1186 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1187 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1188 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1189 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1190 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1191 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1192 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1193 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1194 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1195
1196 /*
1197 * Compute another frequently used values
1198 */
1199 uspi->s_fpbmask = uspi->s_fpb - 1;
1200 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1201 uspi->s_apbshift = uspi->s_bshift - 3;
1202 else
1203 uspi->s_apbshift = uspi->s_bshift - 2;
1204
1205 uspi->s_2apbshift = uspi->s_apbshift * 2;
1206 uspi->s_3apbshift = uspi->s_apbshift * 3;
1207 uspi->s_apb = 1 << uspi->s_apbshift;
1208 uspi->s_2apb = 1 << uspi->s_2apbshift;
1209 uspi->s_3apb = 1 << uspi->s_3apbshift;
1210 uspi->s_apbmask = uspi->s_apb - 1;
1211 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1212 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1213 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1214 uspi->s_bpf = uspi->s_fsize << 3;
1215 uspi->s_bpfshift = uspi->s_fshift + 3;
1216 uspi->s_bpfmask = uspi->s_bpf - 1;
1217 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1218 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1219 uspi->s_maxsymlinklen =
1220 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1221
1222 if (uspi->fs_magic == UFS2_MAGIC)
1223 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1224 else
1225 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1226 if (uspi->s_maxsymlinklen > maxsymlen) {
1227 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1228 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1229 uspi->s_maxsymlinklen = maxsymlen;
1230 }
1231 sb->s_max_links = UFS_LINK_MAX;
1232
1233 inode = ufs_iget(sb, UFS_ROOTINO);
1234 if (IS_ERR(inode)) {
1235 ret = PTR_ERR(inode);
1236 goto failed;
1237 }
1238 sb->s_root = d_make_root(inode);
1239 if (!sb->s_root) {
1240 ret = -ENOMEM;
1241 goto failed;
1242 }
1243
1244 ufs_setup_cstotal(sb);
1245 /*
1246 * Read cylinder group structures
1247 */
1248 if (!(sb->s_flags & MS_RDONLY))
1249 if (!ufs_read_cylinder_structures(sb))
1250 goto failed;
1251
1252 UFSD("EXIT\n");
1253 return 0;
1254
1255 failed:
1256 mutex_destroy(&sbi->mutex);
1257 if (ubh)
1258 ubh_brelse_uspi (uspi);
1259 kfree (uspi);
1260 kfree(sbi);
1261 sb->s_fs_info = NULL;
1262 UFSD("EXIT (FAILED)\n");
1263 return ret;
1264
1265 failed_nomem:
1266 UFSD("EXIT (NOMEM)\n");
1267 return -ENOMEM;
1268 }
1269
1270 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1271 {
1272 struct ufs_sb_private_info * uspi;
1273 struct ufs_super_block_first * usb1;
1274 struct ufs_super_block_third * usb3;
1275 unsigned new_mount_opt, ufstype;
1276 unsigned flags;
1277
1278 sync_filesystem(sb);
1279 lock_ufs(sb);
1280 uspi = UFS_SB(sb)->s_uspi;
1281 flags = UFS_SB(sb)->s_flags;
1282 usb1 = ubh_get_usb_first(uspi);
1283 usb3 = ubh_get_usb_third(uspi);
1284
1285 /*
1286 * Allow the "check" option to be passed as a remount option.
1287 * It is not possible to change ufstype option during remount
1288 */
1289 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1290 new_mount_opt = 0;
1291 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1292 if (!ufs_parse_options (data, &new_mount_opt)) {
1293 unlock_ufs(sb);
1294 return -EINVAL;
1295 }
1296 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1297 new_mount_opt |= ufstype;
1298 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1299 pr_err("ufstype can't be changed during remount\n");
1300 unlock_ufs(sb);
1301 return -EINVAL;
1302 }
1303
1304 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1305 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1306 unlock_ufs(sb);
1307 return 0;
1308 }
1309
1310 /*
1311 * fs was mouted as rw, remounting ro
1312 */
1313 if (*mount_flags & MS_RDONLY) {
1314 ufs_put_super_internal(sb);
1315 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1316 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1317 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1318 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1319 ufs_set_fs_state(sb, usb1, usb3,
1320 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1321 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1322 sb->s_flags |= MS_RDONLY;
1323 } else {
1324 /*
1325 * fs was mounted as ro, remounting rw
1326 */
1327 #ifndef CONFIG_UFS_FS_WRITE
1328 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1329 unlock_ufs(sb);
1330 return -EINVAL;
1331 #else
1332 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1333 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1334 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1335 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1336 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1337 pr_err("this ufstype is read-only supported\n");
1338 unlock_ufs(sb);
1339 return -EINVAL;
1340 }
1341 if (!ufs_read_cylinder_structures(sb)) {
1342 pr_err("failed during remounting\n");
1343 unlock_ufs(sb);
1344 return -EPERM;
1345 }
1346 sb->s_flags &= ~MS_RDONLY;
1347 #endif
1348 }
1349 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1350 unlock_ufs(sb);
1351 return 0;
1352 }
1353
1354 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1355 {
1356 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1357 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1358 const struct match_token *tp = tokens;
1359
1360 while (tp->token != Opt_onerror_panic && tp->token != mval)
1361 ++tp;
1362 BUG_ON(tp->token == Opt_onerror_panic);
1363 seq_printf(seq, ",%s", tp->pattern);
1364
1365 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1366 while (tp->token != Opt_err && tp->token != mval)
1367 ++tp;
1368 BUG_ON(tp->token == Opt_err);
1369 seq_printf(seq, ",%s", tp->pattern);
1370
1371 return 0;
1372 }
1373
1374 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1375 {
1376 struct super_block *sb = dentry->d_sb;
1377 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1378 unsigned flags = UFS_SB(sb)->s_flags;
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 usb3 = ubh_get_usb_third(uspi);
1385
1386 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1387 buf->f_type = UFS2_MAGIC;
1388 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1389 } else {
1390 buf->f_type = UFS_MAGIC;
1391 buf->f_blocks = uspi->s_dsize;
1392 }
1393 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1394 uspi->cs_total.cs_nffree;
1395 buf->f_ffree = uspi->cs_total.cs_nifree;
1396 buf->f_bsize = sb->s_blocksize;
1397 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1398 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1399 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1400 buf->f_namelen = UFS_MAXNAMLEN;
1401 buf->f_fsid.val[0] = (u32)id;
1402 buf->f_fsid.val[1] = (u32)(id >> 32);
1403
1404 unlock_ufs(sb);
1405
1406 return 0;
1407 }
1408
1409 static struct kmem_cache * ufs_inode_cachep;
1410
1411 static struct inode *ufs_alloc_inode(struct super_block *sb)
1412 {
1413 struct ufs_inode_info *ei;
1414
1415 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1416 if (!ei)
1417 return NULL;
1418
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 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 /*
1456 * Make sure all delayed rcu free inodes are flushed before we
1457 * destroy cache.
1458 */
1459 rcu_barrier();
1460 kmem_cache_destroy(ufs_inode_cachep);
1461 }
1462
1463 static const struct super_operations ufs_super_ops = {
1464 .alloc_inode = ufs_alloc_inode,
1465 .destroy_inode = ufs_destroy_inode,
1466 .write_inode = ufs_write_inode,
1467 .evict_inode = ufs_evict_inode,
1468 .put_super = ufs_put_super,
1469 .sync_fs = ufs_sync_fs,
1470 .statfs = ufs_statfs,
1471 .remount_fs = ufs_remount,
1472 .show_options = ufs_show_options,
1473 };
1474
1475 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1476 int flags, const char *dev_name, void *data)
1477 {
1478 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1479 }
1480
1481 static struct file_system_type ufs_fs_type = {
1482 .owner = THIS_MODULE,
1483 .name = "ufs",
1484 .mount = ufs_mount,
1485 .kill_sb = kill_block_super,
1486 .fs_flags = FS_REQUIRES_DEV,
1487 };
1488 MODULE_ALIAS_FS("ufs");
1489
1490 static int __init init_ufs_fs(void)
1491 {
1492 int err = init_inodecache();
1493 if (err)
1494 goto out1;
1495 err = register_filesystem(&ufs_fs_type);
1496 if (err)
1497 goto out;
1498 return 0;
1499 out:
1500 destroy_inodecache();
1501 out1:
1502 return err;
1503 }
1504
1505 static void __exit exit_ufs_fs(void)
1506 {
1507 unregister_filesystem(&ufs_fs_type);
1508 destroy_inodecache();
1509 }
1510
1511 module_init(init_ufs_fs)
1512 module_exit(exit_ufs_fs)
1513 MODULE_LICENSE("GPL");
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