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