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
lock_ufs(struct super_block * sb)96 void lock_ufs(struct super_block *sb)
97 {
98 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
99 struct ufs_sb_info *sbi = UFS_SB(sb);
100
101 mutex_lock(&sbi->mutex);
102 sbi->mutex_owner = current;
103 #endif
104 }
105
unlock_ufs(struct super_block * sb)106 void unlock_ufs(struct super_block *sb)
107 {
108 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
109 struct ufs_sb_info *sbi = UFS_SB(sb);
110
111 sbi->mutex_owner = NULL;
112 mutex_unlock(&sbi->mutex);
113 #endif
114 }
115
ufs_nfs_get_inode(struct super_block * sb,u64 ino,u32 generation)116 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
117 {
118 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
119 struct inode *inode;
120
121 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
122 return ERR_PTR(-ESTALE);
123
124 inode = ufs_iget(sb, ino);
125 if (IS_ERR(inode))
126 return ERR_CAST(inode);
127 if (generation && inode->i_generation != generation) {
128 iput(inode);
129 return ERR_PTR(-ESTALE);
130 }
131 return inode;
132 }
133
ufs_fh_to_dentry(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)134 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
135 int fh_len, int fh_type)
136 {
137 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
138 }
139
ufs_fh_to_parent(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)140 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
141 int fh_len, int fh_type)
142 {
143 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
144 }
145
ufs_get_parent(struct dentry * child)146 static struct dentry *ufs_get_parent(struct dentry *child)
147 {
148 struct qstr dot_dot = QSTR_INIT("..", 2);
149 ino_t ino;
150
151 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
152 if (!ino)
153 return ERR_PTR(-ENOENT);
154 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
155 }
156
157 static const struct export_operations ufs_export_ops = {
158 .fh_to_dentry = ufs_fh_to_dentry,
159 .fh_to_parent = ufs_fh_to_parent,
160 .get_parent = ufs_get_parent,
161 };
162
163 #ifdef CONFIG_UFS_DEBUG
164 /*
165 * Print contents of ufs_super_block, useful for debugging
166 */
ufs_print_super_stuff(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_second * usb2,struct ufs_super_block_third * usb3)167 static void ufs_print_super_stuff(struct super_block *sb,
168 struct ufs_super_block_first *usb1,
169 struct ufs_super_block_second *usb2,
170 struct ufs_super_block_third *usb3)
171 {
172 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
173
174 pr_debug("ufs_print_super_stuff\n");
175 pr_debug(" magic: 0x%x\n", magic);
176 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
177 pr_debug(" fs_size: %llu\n", (unsigned long long)
178 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
179 pr_debug(" fs_dsize: %llu\n", (unsigned long long)
180 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
181 pr_debug(" bsize: %u\n",
182 fs32_to_cpu(sb, usb1->fs_bsize));
183 pr_debug(" fsize: %u\n",
184 fs32_to_cpu(sb, usb1->fs_fsize));
185 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
186 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
187 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
188 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
189 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
190 pr_debug(" cs_nbfree(No of free blocks): %llu\n",
191 (unsigned long long)
192 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
193 pr_info(" cs_nifree(Num of free inodes): %llu\n",
194 (unsigned long long)
195 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
196 pr_info(" cs_nffree(Num of free frags): %llu\n",
197 (unsigned long long)
198 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
199 pr_info(" fs_maxsymlinklen: %u\n",
200 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
201 } else {
202 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
203 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
204 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
205 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
206 pr_debug(" cgoffset: %u\n",
207 fs32_to_cpu(sb, usb1->fs_cgoffset));
208 pr_debug(" ~cgmask: 0x%x\n",
209 ~fs32_to_cpu(sb, usb1->fs_cgmask));
210 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
211 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
212 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
213 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
214 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
215 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
216 pr_debug(" fragshift: %u\n",
217 fs32_to_cpu(sb, usb1->fs_fragshift));
218 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
219 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
220 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
221 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
222 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
223 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
224 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
225 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
226 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
227 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
228 pr_debug(" fstodb: %u\n",
229 fs32_to_cpu(sb, usb1->fs_fsbtodb));
230 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
231 pr_debug(" ndir %u\n",
232 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
233 pr_debug(" nifree %u\n",
234 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
235 pr_debug(" nbfree %u\n",
236 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
237 pr_debug(" nffree %u\n",
238 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
239 }
240 pr_debug("\n");
241 }
242
243 /*
244 * Print contents of ufs_cylinder_group, useful for debugging
245 */
ufs_print_cylinder_stuff(struct super_block * sb,struct ufs_cylinder_group * cg)246 static void ufs_print_cylinder_stuff(struct super_block *sb,
247 struct ufs_cylinder_group *cg)
248 {
249 pr_debug("\nufs_print_cylinder_stuff\n");
250 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
251 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
252 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
253 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
254 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
255 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
256 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
257 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
258 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
259 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
260 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
261 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
262 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
263 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
264 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
265 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
266 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
267 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
268 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
269 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
270 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
271 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
272 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
273 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
274 pr_debug(" clustersumoff %u\n",
275 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
276 pr_debug(" clusteroff %u\n",
277 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
278 pr_debug(" nclusterblks %u\n",
279 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
280 pr_debug("\n");
281 }
282 #else
283 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
284 # define ufs_print_cylinder_stuff(sb, cg) /**/
285 #endif /* CONFIG_UFS_DEBUG */
286
287 static const struct super_operations ufs_super_ops;
288
ufs_error(struct super_block * sb,const char * function,const char * fmt,...)289 void ufs_error (struct super_block * sb, const char * function,
290 const char * fmt, ...)
291 {
292 struct ufs_sb_private_info * uspi;
293 struct ufs_super_block_first * usb1;
294 struct va_format vaf;
295 va_list args;
296
297 uspi = UFS_SB(sb)->s_uspi;
298 usb1 = ubh_get_usb_first(uspi);
299
300 if (!(sb->s_flags & MS_RDONLY)) {
301 usb1->fs_clean = UFS_FSBAD;
302 ubh_mark_buffer_dirty(USPI_UBH(uspi));
303 ufs_mark_sb_dirty(sb);
304 sb->s_flags |= MS_RDONLY;
305 }
306 va_start(args, fmt);
307 vaf.fmt = fmt;
308 vaf.va = &args;
309 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
310 case UFS_MOUNT_ONERROR_PANIC:
311 panic("panic (device %s): %s: %pV\n",
312 sb->s_id, function, &vaf);
313
314 case UFS_MOUNT_ONERROR_LOCK:
315 case UFS_MOUNT_ONERROR_UMOUNT:
316 case UFS_MOUNT_ONERROR_REPAIR:
317 pr_crit("error (device %s): %s: %pV\n",
318 sb->s_id, function, &vaf);
319 }
320 va_end(args);
321 }
322
ufs_panic(struct super_block * sb,const char * function,const char * fmt,...)323 void ufs_panic (struct super_block * sb, const char * function,
324 const char * fmt, ...)
325 {
326 struct ufs_sb_private_info * uspi;
327 struct ufs_super_block_first * usb1;
328 struct va_format vaf;
329 va_list args;
330
331 uspi = UFS_SB(sb)->s_uspi;
332 usb1 = ubh_get_usb_first(uspi);
333
334 if (!(sb->s_flags & MS_RDONLY)) {
335 usb1->fs_clean = UFS_FSBAD;
336 ubh_mark_buffer_dirty(USPI_UBH(uspi));
337 ufs_mark_sb_dirty(sb);
338 }
339 va_start(args, fmt);
340 vaf.fmt = fmt;
341 vaf.va = &args;
342 sb->s_flags |= MS_RDONLY;
343 pr_crit("panic (device %s): %s: %pV\n",
344 sb->s_id, function, &vaf);
345 va_end(args);
346 }
347
ufs_warning(struct super_block * sb,const char * function,const char * fmt,...)348 void ufs_warning (struct super_block * sb, const char * function,
349 const char * fmt, ...)
350 {
351 struct va_format vaf;
352 va_list args;
353
354 va_start(args, fmt);
355 vaf.fmt = fmt;
356 vaf.va = &args;
357 pr_warn("(device %s): %s: %pV\n",
358 sb->s_id, function, &vaf);
359 va_end(args);
360 }
361
362 enum {
363 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
364 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
365 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
366 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
367 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
368 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
369 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
370 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
371 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
372 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
373 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
374 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
375 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
376 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
377 Opt_err
378 };
379
380 static const match_table_t tokens = {
381 {Opt_type_old, "ufstype=old"},
382 {Opt_type_sunx86, "ufstype=sunx86"},
383 {Opt_type_sun, "ufstype=sun"},
384 {Opt_type_sunos, "ufstype=sunos"},
385 {Opt_type_44bsd, "ufstype=44bsd"},
386 {Opt_type_ufs2, "ufstype=ufs2"},
387 {Opt_type_ufs2, "ufstype=5xbsd"},
388 {Opt_type_hp, "ufstype=hp"},
389 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
390 {Opt_type_nextstep, "ufstype=nextstep"},
391 {Opt_type_openstep, "ufstype=openstep"},
392 /*end of possible ufs types */
393 {Opt_onerror_panic, "onerror=panic"},
394 {Opt_onerror_lock, "onerror=lock"},
395 {Opt_onerror_umount, "onerror=umount"},
396 {Opt_onerror_repair, "onerror=repair"},
397 {Opt_err, NULL}
398 };
399
ufs_parse_options(char * options,unsigned * mount_options)400 static int ufs_parse_options (char * options, unsigned * mount_options)
401 {
402 char * p;
403
404 UFSD("ENTER\n");
405
406 if (!options)
407 return 1;
408
409 while ((p = strsep(&options, ",")) != NULL) {
410 substring_t args[MAX_OPT_ARGS];
411 int token;
412 if (!*p)
413 continue;
414
415 token = match_token(p, tokens, args);
416 switch (token) {
417 case Opt_type_old:
418 ufs_clear_opt (*mount_options, UFSTYPE);
419 ufs_set_opt (*mount_options, UFSTYPE_OLD);
420 break;
421 case Opt_type_sunx86:
422 ufs_clear_opt (*mount_options, UFSTYPE);
423 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
424 break;
425 case Opt_type_sun:
426 ufs_clear_opt (*mount_options, UFSTYPE);
427 ufs_set_opt (*mount_options, UFSTYPE_SUN);
428 break;
429 case Opt_type_sunos:
430 ufs_clear_opt(*mount_options, UFSTYPE);
431 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
432 break;
433 case Opt_type_44bsd:
434 ufs_clear_opt (*mount_options, UFSTYPE);
435 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
436 break;
437 case Opt_type_ufs2:
438 ufs_clear_opt(*mount_options, UFSTYPE);
439 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
440 break;
441 case Opt_type_hp:
442 ufs_clear_opt (*mount_options, UFSTYPE);
443 ufs_set_opt (*mount_options, UFSTYPE_HP);
444 break;
445 case Opt_type_nextstepcd:
446 ufs_clear_opt (*mount_options, UFSTYPE);
447 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
448 break;
449 case Opt_type_nextstep:
450 ufs_clear_opt (*mount_options, UFSTYPE);
451 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
452 break;
453 case Opt_type_openstep:
454 ufs_clear_opt (*mount_options, UFSTYPE);
455 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
456 break;
457 case Opt_onerror_panic:
458 ufs_clear_opt (*mount_options, ONERROR);
459 ufs_set_opt (*mount_options, ONERROR_PANIC);
460 break;
461 case Opt_onerror_lock:
462 ufs_clear_opt (*mount_options, ONERROR);
463 ufs_set_opt (*mount_options, ONERROR_LOCK);
464 break;
465 case Opt_onerror_umount:
466 ufs_clear_opt (*mount_options, ONERROR);
467 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
468 break;
469 case Opt_onerror_repair:
470 pr_err("Unable to do repair on error, will lock lock instead\n");
471 ufs_clear_opt (*mount_options, ONERROR);
472 ufs_set_opt (*mount_options, ONERROR_REPAIR);
473 break;
474 default:
475 pr_err("Invalid option: \"%s\" or missing value\n", p);
476 return 0;
477 }
478 }
479 return 1;
480 }
481
482 /*
483 * Different types of UFS hold fs_cstotal in different
484 * places, and use different data structure for it.
485 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
486 */
ufs_setup_cstotal(struct super_block * sb)487 static void ufs_setup_cstotal(struct super_block *sb)
488 {
489 struct ufs_sb_info *sbi = UFS_SB(sb);
490 struct ufs_sb_private_info *uspi = sbi->s_uspi;
491 struct ufs_super_block_first *usb1;
492 struct ufs_super_block_second *usb2;
493 struct ufs_super_block_third *usb3;
494 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
495
496 UFSD("ENTER, mtype=%u\n", mtype);
497 usb1 = ubh_get_usb_first(uspi);
498 usb2 = ubh_get_usb_second(uspi);
499 usb3 = ubh_get_usb_third(uspi);
500
501 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
502 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
503 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
504 /*we have statistic in different place, then usual*/
505 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
506 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
507 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
508 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
509 } else {
510 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
511 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
512 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
513 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
514 }
515 UFSD("EXIT\n");
516 }
517
518 /*
519 * Read on-disk structures associated with cylinder groups
520 */
ufs_read_cylinder_structures(struct super_block * sb)521 static int ufs_read_cylinder_structures(struct super_block *sb)
522 {
523 struct ufs_sb_info *sbi = UFS_SB(sb);
524 struct ufs_sb_private_info *uspi = sbi->s_uspi;
525 struct ufs_buffer_head * ubh;
526 unsigned char * base, * space;
527 unsigned size, blks, i;
528
529 UFSD("ENTER\n");
530
531 /*
532 * Read cs structures from (usually) first data block
533 * on the device.
534 */
535 size = uspi->s_cssize;
536 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
537 base = space = kmalloc(size, GFP_NOFS);
538 if (!base)
539 goto failed;
540 sbi->s_csp = (struct ufs_csum *)space;
541 for (i = 0; i < blks; i += uspi->s_fpb) {
542 size = uspi->s_bsize;
543 if (i + uspi->s_fpb > blks)
544 size = (blks - i) * uspi->s_fsize;
545
546 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
547
548 if (!ubh)
549 goto failed;
550
551 ubh_ubhcpymem (space, ubh, size);
552
553 space += size;
554 ubh_brelse (ubh);
555 ubh = NULL;
556 }
557
558 /*
559 * Read cylinder group (we read only first fragment from block
560 * at this time) and prepare internal data structures for cg caching.
561 */
562 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
563 goto failed;
564 for (i = 0; i < uspi->s_ncg; i++)
565 sbi->s_ucg[i] = NULL;
566 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
567 sbi->s_ucpi[i] = NULL;
568 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
569 }
570 for (i = 0; i < uspi->s_ncg; i++) {
571 UFSD("read cg %u\n", i);
572 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
573 goto failed;
574 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
575 goto failed;
576
577 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
578 }
579 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
580 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
581 goto failed;
582 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
583 }
584 sbi->s_cg_loaded = 0;
585 UFSD("EXIT\n");
586 return 1;
587
588 failed:
589 kfree (base);
590 if (sbi->s_ucg) {
591 for (i = 0; i < uspi->s_ncg; i++)
592 if (sbi->s_ucg[i])
593 brelse (sbi->s_ucg[i]);
594 kfree (sbi->s_ucg);
595 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
596 kfree (sbi->s_ucpi[i]);
597 }
598 UFSD("EXIT (FAILED)\n");
599 return 0;
600 }
601
602 /*
603 * Sync our internal copy of fs_cstotal with disk
604 */
ufs_put_cstotal(struct super_block * sb)605 static void ufs_put_cstotal(struct super_block *sb)
606 {
607 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
608 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
609 struct ufs_super_block_first *usb1;
610 struct ufs_super_block_second *usb2;
611 struct ufs_super_block_third *usb3;
612
613 UFSD("ENTER\n");
614 usb1 = ubh_get_usb_first(uspi);
615 usb2 = ubh_get_usb_second(uspi);
616 usb3 = ubh_get_usb_third(uspi);
617
618 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
619 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
620 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
621 /*we have statistic in different place, then usual*/
622 usb2->fs_un.fs_u2.cs_ndir =
623 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
624 usb2->fs_un.fs_u2.cs_nbfree =
625 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
626 usb3->fs_un1.fs_u2.cs_nifree =
627 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
628 usb3->fs_un1.fs_u2.cs_nffree =
629 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
630 } else {
631 usb1->fs_cstotal.cs_ndir =
632 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
633 usb1->fs_cstotal.cs_nbfree =
634 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
635 usb1->fs_cstotal.cs_nifree =
636 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
637 usb1->fs_cstotal.cs_nffree =
638 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
639 }
640 ubh_mark_buffer_dirty(USPI_UBH(uspi));
641 ufs_print_super_stuff(sb, usb1, usb2, usb3);
642 UFSD("EXIT\n");
643 }
644
645 /**
646 * ufs_put_super_internal() - put on-disk intrenal structures
647 * @sb: pointer to super_block structure
648 * Put on-disk structures associated with cylinder groups
649 * and write them back to disk, also update cs_total on disk
650 */
ufs_put_super_internal(struct super_block * sb)651 static void ufs_put_super_internal(struct super_block *sb)
652 {
653 struct ufs_sb_info *sbi = UFS_SB(sb);
654 struct ufs_sb_private_info *uspi = sbi->s_uspi;
655 struct ufs_buffer_head * ubh;
656 unsigned char * base, * space;
657 unsigned blks, size, i;
658
659
660 UFSD("ENTER\n");
661
662 ufs_put_cstotal(sb);
663 size = uspi->s_cssize;
664 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
665 base = space = (char*) sbi->s_csp;
666 for (i = 0; i < blks; i += uspi->s_fpb) {
667 size = uspi->s_bsize;
668 if (i + uspi->s_fpb > blks)
669 size = (blks - i) * uspi->s_fsize;
670
671 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
672
673 ubh_memcpyubh (ubh, space, size);
674 space += size;
675 ubh_mark_buffer_uptodate (ubh, 1);
676 ubh_mark_buffer_dirty (ubh);
677 ubh_brelse (ubh);
678 }
679 for (i = 0; i < sbi->s_cg_loaded; i++) {
680 ufs_put_cylinder (sb, i);
681 kfree (sbi->s_ucpi[i]);
682 }
683 for (; i < UFS_MAX_GROUP_LOADED; i++)
684 kfree (sbi->s_ucpi[i]);
685 for (i = 0; i < uspi->s_ncg; i++)
686 brelse (sbi->s_ucg[i]);
687 kfree (sbi->s_ucg);
688 kfree (base);
689
690 UFSD("EXIT\n");
691 }
692
ufs_sync_fs(struct super_block * sb,int wait)693 static int ufs_sync_fs(struct super_block *sb, int wait)
694 {
695 struct ufs_sb_private_info * uspi;
696 struct ufs_super_block_first * usb1;
697 struct ufs_super_block_third * usb3;
698 unsigned flags;
699
700 lock_ufs(sb);
701 mutex_lock(&UFS_SB(sb)->s_lock);
702
703 UFSD("ENTER\n");
704
705 flags = UFS_SB(sb)->s_flags;
706 uspi = UFS_SB(sb)->s_uspi;
707 usb1 = ubh_get_usb_first(uspi);
708 usb3 = ubh_get_usb_third(uspi);
709
710 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
711 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
712 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
713 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
714 ufs_set_fs_state(sb, usb1, usb3,
715 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
716 ufs_put_cstotal(sb);
717
718 UFSD("EXIT\n");
719 mutex_unlock(&UFS_SB(sb)->s_lock);
720 unlock_ufs(sb);
721
722 return 0;
723 }
724
delayed_sync_fs(struct work_struct * work)725 static void delayed_sync_fs(struct work_struct *work)
726 {
727 struct ufs_sb_info *sbi;
728
729 sbi = container_of(work, struct ufs_sb_info, sync_work.work);
730
731 spin_lock(&sbi->work_lock);
732 sbi->work_queued = 0;
733 spin_unlock(&sbi->work_lock);
734
735 ufs_sync_fs(sbi->sb, 1);
736 }
737
ufs_mark_sb_dirty(struct super_block * sb)738 void ufs_mark_sb_dirty(struct super_block *sb)
739 {
740 struct ufs_sb_info *sbi = UFS_SB(sb);
741 unsigned long delay;
742
743 spin_lock(&sbi->work_lock);
744 if (!sbi->work_queued) {
745 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
746 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
747 sbi->work_queued = 1;
748 }
749 spin_unlock(&sbi->work_lock);
750 }
751
ufs_put_super(struct super_block * sb)752 static void ufs_put_super(struct super_block *sb)
753 {
754 struct ufs_sb_info * sbi = UFS_SB(sb);
755
756 UFSD("ENTER\n");
757
758 if (!(sb->s_flags & MS_RDONLY))
759 ufs_put_super_internal(sb);
760 cancel_delayed_work_sync(&sbi->sync_work);
761
762 ubh_brelse_uspi (sbi->s_uspi);
763 kfree (sbi->s_uspi);
764 mutex_destroy(&sbi->mutex);
765 kfree (sbi);
766 sb->s_fs_info = NULL;
767 UFSD("EXIT\n");
768 return;
769 }
770
ufs_fill_super(struct super_block * sb,void * data,int silent)771 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
772 {
773 struct ufs_sb_info * sbi;
774 struct ufs_sb_private_info * uspi;
775 struct ufs_super_block_first * usb1;
776 struct ufs_super_block_second * usb2;
777 struct ufs_super_block_third * usb3;
778 struct ufs_buffer_head * ubh;
779 struct inode *inode;
780 unsigned block_size, super_block_size;
781 unsigned flags;
782 unsigned super_block_offset;
783 unsigned maxsymlen;
784 int ret = -EINVAL;
785
786 uspi = NULL;
787 ubh = NULL;
788 flags = 0;
789
790 UFSD("ENTER\n");
791
792 #ifndef CONFIG_UFS_FS_WRITE
793 if (!(sb->s_flags & MS_RDONLY)) {
794 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
795 return -EROFS;
796 }
797 #endif
798
799 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
800 if (!sbi)
801 goto failed_nomem;
802 sb->s_fs_info = sbi;
803 sbi->sb = sb;
804
805 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
806
807 mutex_init(&sbi->mutex);
808 mutex_init(&sbi->s_lock);
809 spin_lock_init(&sbi->work_lock);
810 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
811 /*
812 * Set default mount options
813 * Parse mount options
814 */
815 sbi->s_mount_opt = 0;
816 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
817 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
818 pr_err("wrong mount options\n");
819 goto failed;
820 }
821 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
822 if (!silent)
823 pr_err("You didn't specify the type of your ufs filesystem\n\n"
824 "mount -t ufs -o ufstype="
825 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
826 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
827 "default is ufstype=old\n");
828 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
829 }
830
831 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
832 sbi->s_uspi = uspi;
833 if (!uspi)
834 goto failed;
835 uspi->s_dirblksize = UFS_SECTOR_SIZE;
836 super_block_offset=UFS_SBLOCK;
837
838 /* Keep 2Gig file limit. Some UFS variants need to override
839 this but as I don't know which I'll let those in the know loosen
840 the rules */
841 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
842 case UFS_MOUNT_UFSTYPE_44BSD:
843 UFSD("ufstype=44bsd\n");
844 uspi->s_fsize = block_size = 512;
845 uspi->s_fmask = ~(512 - 1);
846 uspi->s_fshift = 9;
847 uspi->s_sbsize = super_block_size = 1536;
848 uspi->s_sbbase = 0;
849 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
850 break;
851 case UFS_MOUNT_UFSTYPE_UFS2:
852 UFSD("ufstype=ufs2\n");
853 super_block_offset=SBLOCK_UFS2;
854 uspi->s_fsize = block_size = 512;
855 uspi->s_fmask = ~(512 - 1);
856 uspi->s_fshift = 9;
857 uspi->s_sbsize = super_block_size = 1536;
858 uspi->s_sbbase = 0;
859 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
860 break;
861
862 case UFS_MOUNT_UFSTYPE_SUN:
863 UFSD("ufstype=sun\n");
864 uspi->s_fsize = block_size = 1024;
865 uspi->s_fmask = ~(1024 - 1);
866 uspi->s_fshift = 10;
867 uspi->s_sbsize = super_block_size = 2048;
868 uspi->s_sbbase = 0;
869 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
870 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
871 break;
872
873 case UFS_MOUNT_UFSTYPE_SUNOS:
874 UFSD("ufstype=sunos\n");
875 uspi->s_fsize = block_size = 1024;
876 uspi->s_fmask = ~(1024 - 1);
877 uspi->s_fshift = 10;
878 uspi->s_sbsize = 2048;
879 super_block_size = 2048;
880 uspi->s_sbbase = 0;
881 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
882 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
883 break;
884
885 case UFS_MOUNT_UFSTYPE_SUNx86:
886 UFSD("ufstype=sunx86\n");
887 uspi->s_fsize = block_size = 1024;
888 uspi->s_fmask = ~(1024 - 1);
889 uspi->s_fshift = 10;
890 uspi->s_sbsize = super_block_size = 2048;
891 uspi->s_sbbase = 0;
892 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
893 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
894 break;
895
896 case UFS_MOUNT_UFSTYPE_OLD:
897 UFSD("ufstype=old\n");
898 uspi->s_fsize = block_size = 1024;
899 uspi->s_fmask = ~(1024 - 1);
900 uspi->s_fshift = 10;
901 uspi->s_sbsize = super_block_size = 2048;
902 uspi->s_sbbase = 0;
903 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
904 if (!(sb->s_flags & MS_RDONLY)) {
905 if (!silent)
906 pr_info("ufstype=old is supported read-only\n");
907 sb->s_flags |= MS_RDONLY;
908 }
909 break;
910
911 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
912 UFSD("ufstype=nextstep\n");
913 uspi->s_fsize = block_size = 1024;
914 uspi->s_fmask = ~(1024 - 1);
915 uspi->s_fshift = 10;
916 uspi->s_sbsize = super_block_size = 2048;
917 uspi->s_sbbase = 0;
918 uspi->s_dirblksize = 1024;
919 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
920 if (!(sb->s_flags & MS_RDONLY)) {
921 if (!silent)
922 pr_info("ufstype=nextstep is supported read-only\n");
923 sb->s_flags |= MS_RDONLY;
924 }
925 break;
926
927 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
928 UFSD("ufstype=nextstep-cd\n");
929 uspi->s_fsize = block_size = 2048;
930 uspi->s_fmask = ~(2048 - 1);
931 uspi->s_fshift = 11;
932 uspi->s_sbsize = super_block_size = 2048;
933 uspi->s_sbbase = 0;
934 uspi->s_dirblksize = 1024;
935 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
936 if (!(sb->s_flags & MS_RDONLY)) {
937 if (!silent)
938 pr_info("ufstype=nextstep-cd is supported read-only\n");
939 sb->s_flags |= MS_RDONLY;
940 }
941 break;
942
943 case UFS_MOUNT_UFSTYPE_OPENSTEP:
944 UFSD("ufstype=openstep\n");
945 uspi->s_fsize = block_size = 1024;
946 uspi->s_fmask = ~(1024 - 1);
947 uspi->s_fshift = 10;
948 uspi->s_sbsize = super_block_size = 2048;
949 uspi->s_sbbase = 0;
950 uspi->s_dirblksize = 1024;
951 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
952 if (!(sb->s_flags & MS_RDONLY)) {
953 if (!silent)
954 pr_info("ufstype=openstep is supported read-only\n");
955 sb->s_flags |= MS_RDONLY;
956 }
957 break;
958
959 case UFS_MOUNT_UFSTYPE_HP:
960 UFSD("ufstype=hp\n");
961 uspi->s_fsize = block_size = 1024;
962 uspi->s_fmask = ~(1024 - 1);
963 uspi->s_fshift = 10;
964 uspi->s_sbsize = super_block_size = 2048;
965 uspi->s_sbbase = 0;
966 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
967 if (!(sb->s_flags & MS_RDONLY)) {
968 if (!silent)
969 pr_info("ufstype=hp is supported read-only\n");
970 sb->s_flags |= MS_RDONLY;
971 }
972 break;
973 default:
974 if (!silent)
975 pr_err("unknown ufstype\n");
976 goto failed;
977 }
978
979 again:
980 if (!sb_set_blocksize(sb, block_size)) {
981 pr_err("failed to set blocksize\n");
982 goto failed;
983 }
984
985 /*
986 * read ufs super block from device
987 */
988
989 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
990
991 if (!ubh)
992 goto failed;
993
994 usb1 = ubh_get_usb_first(uspi);
995 usb2 = ubh_get_usb_second(uspi);
996 usb3 = ubh_get_usb_third(uspi);
997
998 /* Sort out mod used on SunOS 4.1.3 for fs_state */
999 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1000 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1001 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1002 flags &= ~UFS_ST_MASK;
1003 flags |= UFS_ST_SUN;
1004 }
1005
1006 /*
1007 * Check ufs magic number
1008 */
1009 sbi->s_bytesex = BYTESEX_LE;
1010 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1011 case UFS_MAGIC:
1012 case UFS_MAGIC_BW:
1013 case UFS2_MAGIC:
1014 case UFS_MAGIC_LFN:
1015 case UFS_MAGIC_FEA:
1016 case UFS_MAGIC_4GB:
1017 goto magic_found;
1018 }
1019 sbi->s_bytesex = BYTESEX_BE;
1020 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1021 case UFS_MAGIC:
1022 case UFS_MAGIC_BW:
1023 case UFS2_MAGIC:
1024 case UFS_MAGIC_LFN:
1025 case UFS_MAGIC_FEA:
1026 case UFS_MAGIC_4GB:
1027 goto magic_found;
1028 }
1029
1030 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1031 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1032 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1033 && uspi->s_sbbase < 256) {
1034 ubh_brelse_uspi(uspi);
1035 ubh = NULL;
1036 uspi->s_sbbase += 8;
1037 goto again;
1038 }
1039 if (!silent)
1040 pr_err("%s(): bad magic number\n", __func__);
1041 goto failed;
1042
1043 magic_found:
1044 /*
1045 * Check block and fragment sizes
1046 */
1047 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1048 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1049 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1050 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1051 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1052
1053 if (!is_power_of_2(uspi->s_fsize)) {
1054 pr_err("%s(): fragment size %u is not a power of 2\n",
1055 __func__, uspi->s_fsize);
1056 goto failed;
1057 }
1058 if (uspi->s_fsize < 512) {
1059 pr_err("%s(): fragment size %u is too small\n",
1060 __func__, uspi->s_fsize);
1061 goto failed;
1062 }
1063 if (uspi->s_fsize > 4096) {
1064 pr_err("%s(): fragment size %u is too large\n",
1065 __func__, uspi->s_fsize);
1066 goto failed;
1067 }
1068 if (!is_power_of_2(uspi->s_bsize)) {
1069 pr_err("%s(): block size %u is not a power of 2\n",
1070 __func__, uspi->s_bsize);
1071 goto failed;
1072 }
1073 if (uspi->s_bsize < 4096) {
1074 pr_err("%s(): block size %u is too small\n",
1075 __func__, uspi->s_bsize);
1076 goto failed;
1077 }
1078 if (uspi->s_bsize / uspi->s_fsize > 8) {
1079 pr_err("%s(): too many fragments per block (%u)\n",
1080 __func__, uspi->s_bsize / uspi->s_fsize);
1081 goto failed;
1082 }
1083 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1084 ubh_brelse_uspi(uspi);
1085 ubh = NULL;
1086 block_size = uspi->s_fsize;
1087 super_block_size = uspi->s_sbsize;
1088 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1089 goto again;
1090 }
1091
1092 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1093 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1094
1095 /*
1096 * Check, if file system was correctly unmounted.
1097 * If not, make it read only.
1098 */
1099 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1100 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1101 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1102 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1103 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1104 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1105 switch(usb1->fs_clean) {
1106 case UFS_FSCLEAN:
1107 UFSD("fs is clean\n");
1108 break;
1109 case UFS_FSSTABLE:
1110 UFSD("fs is stable\n");
1111 break;
1112 case UFS_FSLOG:
1113 UFSD("fs is logging fs\n");
1114 break;
1115 case UFS_FSOSF1:
1116 UFSD("fs is DEC OSF/1\n");
1117 break;
1118 case UFS_FSACTIVE:
1119 pr_err("%s(): fs is active\n", __func__);
1120 sb->s_flags |= MS_RDONLY;
1121 break;
1122 case UFS_FSBAD:
1123 pr_err("%s(): fs is bad\n", __func__);
1124 sb->s_flags |= MS_RDONLY;
1125 break;
1126 default:
1127 pr_err("%s(): can't grok fs_clean 0x%x\n",
1128 __func__, usb1->fs_clean);
1129 sb->s_flags |= MS_RDONLY;
1130 break;
1131 }
1132 } else {
1133 pr_err("%s(): fs needs fsck\n", __func__);
1134 sb->s_flags |= MS_RDONLY;
1135 }
1136
1137 /*
1138 * Read ufs_super_block into internal data structures
1139 */
1140 sb->s_op = &ufs_super_ops;
1141 sb->s_export_op = &ufs_export_ops;
1142
1143 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1144
1145 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1146 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1147 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1148 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1149 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1150 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1151
1152 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1153 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1154 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1155 } else {
1156 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1157 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1158 }
1159
1160 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1161 /* s_bsize already set */
1162 /* s_fsize already set */
1163 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1164 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1165 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1166 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1167 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1168 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1169 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1170 uspi->s_fshift);
1171 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1172 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1173 /* s_sbsize already set */
1174 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1175 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1176 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1177 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1178 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1179 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1180 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1181 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1182
1183 if (uspi->fs_magic == UFS2_MAGIC)
1184 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1185 else
1186 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1187
1188 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1189 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1190 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1191 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1192 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1193 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1194 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1195 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1196 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1197 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1198 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1199 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1200 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1201 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1202
1203 /*
1204 * Compute another frequently used values
1205 */
1206 uspi->s_fpbmask = uspi->s_fpb - 1;
1207 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1208 uspi->s_apbshift = uspi->s_bshift - 3;
1209 else
1210 uspi->s_apbshift = uspi->s_bshift - 2;
1211
1212 uspi->s_2apbshift = uspi->s_apbshift * 2;
1213 uspi->s_3apbshift = uspi->s_apbshift * 3;
1214 uspi->s_apb = 1 << uspi->s_apbshift;
1215 uspi->s_2apb = 1 << uspi->s_2apbshift;
1216 uspi->s_3apb = 1 << uspi->s_3apbshift;
1217 uspi->s_apbmask = uspi->s_apb - 1;
1218 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1219 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1220 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1221 uspi->s_bpf = uspi->s_fsize << 3;
1222 uspi->s_bpfshift = uspi->s_fshift + 3;
1223 uspi->s_bpfmask = uspi->s_bpf - 1;
1224 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1225 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1226 uspi->s_maxsymlinklen =
1227 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1228
1229 if (uspi->fs_magic == UFS2_MAGIC)
1230 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1231 else
1232 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1233 if (uspi->s_maxsymlinklen > maxsymlen) {
1234 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1235 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1236 uspi->s_maxsymlinklen = maxsymlen;
1237 }
1238 sb->s_max_links = UFS_LINK_MAX;
1239
1240 inode = ufs_iget(sb, UFS_ROOTINO);
1241 if (IS_ERR(inode)) {
1242 ret = PTR_ERR(inode);
1243 goto failed;
1244 }
1245 sb->s_root = d_make_root(inode);
1246 if (!sb->s_root) {
1247 ret = -ENOMEM;
1248 goto failed;
1249 }
1250
1251 ufs_setup_cstotal(sb);
1252 /*
1253 * Read cylinder group structures
1254 */
1255 if (!(sb->s_flags & MS_RDONLY))
1256 if (!ufs_read_cylinder_structures(sb))
1257 goto failed;
1258
1259 UFSD("EXIT\n");
1260 return 0;
1261
1262 failed:
1263 mutex_destroy(&sbi->mutex);
1264 if (ubh)
1265 ubh_brelse_uspi (uspi);
1266 kfree (uspi);
1267 kfree(sbi);
1268 sb->s_fs_info = NULL;
1269 UFSD("EXIT (FAILED)\n");
1270 return ret;
1271
1272 failed_nomem:
1273 UFSD("EXIT (NOMEM)\n");
1274 return -ENOMEM;
1275 }
1276
ufs_remount(struct super_block * sb,int * mount_flags,char * data)1277 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1278 {
1279 struct ufs_sb_private_info * uspi;
1280 struct ufs_super_block_first * usb1;
1281 struct ufs_super_block_third * usb3;
1282 unsigned new_mount_opt, ufstype;
1283 unsigned flags;
1284
1285 sync_filesystem(sb);
1286 lock_ufs(sb);
1287 mutex_lock(&UFS_SB(sb)->s_lock);
1288 uspi = UFS_SB(sb)->s_uspi;
1289 flags = UFS_SB(sb)->s_flags;
1290 usb1 = ubh_get_usb_first(uspi);
1291 usb3 = ubh_get_usb_third(uspi);
1292
1293 /*
1294 * Allow the "check" option to be passed as a remount option.
1295 * It is not possible to change ufstype option during remount
1296 */
1297 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1298 new_mount_opt = 0;
1299 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1300 if (!ufs_parse_options (data, &new_mount_opt)) {
1301 mutex_unlock(&UFS_SB(sb)->s_lock);
1302 unlock_ufs(sb);
1303 return -EINVAL;
1304 }
1305 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1306 new_mount_opt |= ufstype;
1307 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1308 pr_err("ufstype can't be changed during remount\n");
1309 mutex_unlock(&UFS_SB(sb)->s_lock);
1310 unlock_ufs(sb);
1311 return -EINVAL;
1312 }
1313
1314 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1315 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1316 mutex_unlock(&UFS_SB(sb)->s_lock);
1317 unlock_ufs(sb);
1318 return 0;
1319 }
1320
1321 /*
1322 * fs was mouted as rw, remounting ro
1323 */
1324 if (*mount_flags & MS_RDONLY) {
1325 ufs_put_super_internal(sb);
1326 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1327 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1328 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1329 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1330 ufs_set_fs_state(sb, usb1, usb3,
1331 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1332 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1333 sb->s_flags |= MS_RDONLY;
1334 } else {
1335 /*
1336 * fs was mounted as ro, remounting rw
1337 */
1338 #ifndef CONFIG_UFS_FS_WRITE
1339 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1340 mutex_unlock(&UFS_SB(sb)->s_lock);
1341 unlock_ufs(sb);
1342 return -EINVAL;
1343 #else
1344 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1345 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1346 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1347 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1348 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1349 pr_err("this ufstype is read-only supported\n");
1350 mutex_unlock(&UFS_SB(sb)->s_lock);
1351 unlock_ufs(sb);
1352 return -EINVAL;
1353 }
1354 if (!ufs_read_cylinder_structures(sb)) {
1355 pr_err("failed during remounting\n");
1356 mutex_unlock(&UFS_SB(sb)->s_lock);
1357 unlock_ufs(sb);
1358 return -EPERM;
1359 }
1360 sb->s_flags &= ~MS_RDONLY;
1361 #endif
1362 }
1363 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1364 mutex_unlock(&UFS_SB(sb)->s_lock);
1365 unlock_ufs(sb);
1366 return 0;
1367 }
1368
ufs_show_options(struct seq_file * seq,struct dentry * root)1369 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1370 {
1371 struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1372 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1373 const struct match_token *tp = tokens;
1374
1375 while (tp->token != Opt_onerror_panic && tp->token != mval)
1376 ++tp;
1377 BUG_ON(tp->token == Opt_onerror_panic);
1378 seq_printf(seq, ",%s", tp->pattern);
1379
1380 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1381 while (tp->token != Opt_err && tp->token != mval)
1382 ++tp;
1383 BUG_ON(tp->token == Opt_err);
1384 seq_printf(seq, ",%s", tp->pattern);
1385
1386 return 0;
1387 }
1388
ufs_statfs(struct dentry * dentry,struct kstatfs * buf)1389 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1390 {
1391 struct super_block *sb = dentry->d_sb;
1392 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1393 unsigned flags = UFS_SB(sb)->s_flags;
1394 struct ufs_super_block_third *usb3;
1395 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1396
1397 lock_ufs(sb);
1398
1399 usb3 = ubh_get_usb_third(uspi);
1400
1401 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1402 buf->f_type = UFS2_MAGIC;
1403 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1404 } else {
1405 buf->f_type = UFS_MAGIC;
1406 buf->f_blocks = uspi->s_dsize;
1407 }
1408 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1409 uspi->cs_total.cs_nffree;
1410 buf->f_ffree = uspi->cs_total.cs_nifree;
1411 buf->f_bsize = sb->s_blocksize;
1412 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1413 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1414 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1415 buf->f_namelen = UFS_MAXNAMLEN;
1416 buf->f_fsid.val[0] = (u32)id;
1417 buf->f_fsid.val[1] = (u32)(id >> 32);
1418
1419 unlock_ufs(sb);
1420
1421 return 0;
1422 }
1423
1424 static struct kmem_cache * ufs_inode_cachep;
1425
ufs_alloc_inode(struct super_block * sb)1426 static struct inode *ufs_alloc_inode(struct super_block *sb)
1427 {
1428 struct ufs_inode_info *ei;
1429 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1430 if (!ei)
1431 return NULL;
1432 ei->vfs_inode.i_version = 1;
1433 return &ei->vfs_inode;
1434 }
1435
ufs_i_callback(struct rcu_head * head)1436 static void ufs_i_callback(struct rcu_head *head)
1437 {
1438 struct inode *inode = container_of(head, struct inode, i_rcu);
1439 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1440 }
1441
ufs_destroy_inode(struct inode * inode)1442 static void ufs_destroy_inode(struct inode *inode)
1443 {
1444 call_rcu(&inode->i_rcu, ufs_i_callback);
1445 }
1446
init_once(void * foo)1447 static void init_once(void *foo)
1448 {
1449 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1450
1451 inode_init_once(&ei->vfs_inode);
1452 }
1453
init_inodecache(void)1454 static int __init init_inodecache(void)
1455 {
1456 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1457 sizeof(struct ufs_inode_info),
1458 0, (SLAB_RECLAIM_ACCOUNT|
1459 SLAB_MEM_SPREAD),
1460 init_once);
1461 if (ufs_inode_cachep == NULL)
1462 return -ENOMEM;
1463 return 0;
1464 }
1465
destroy_inodecache(void)1466 static void destroy_inodecache(void)
1467 {
1468 /*
1469 * Make sure all delayed rcu free inodes are flushed before we
1470 * destroy cache.
1471 */
1472 rcu_barrier();
1473 kmem_cache_destroy(ufs_inode_cachep);
1474 }
1475
1476 static const struct super_operations ufs_super_ops = {
1477 .alloc_inode = ufs_alloc_inode,
1478 .destroy_inode = ufs_destroy_inode,
1479 .write_inode = ufs_write_inode,
1480 .evict_inode = ufs_evict_inode,
1481 .put_super = ufs_put_super,
1482 .sync_fs = ufs_sync_fs,
1483 .statfs = ufs_statfs,
1484 .remount_fs = ufs_remount,
1485 .show_options = ufs_show_options,
1486 };
1487
ufs_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1488 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1489 int flags, const char *dev_name, void *data)
1490 {
1491 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1492 }
1493
1494 static struct file_system_type ufs_fs_type = {
1495 .owner = THIS_MODULE,
1496 .name = "ufs",
1497 .mount = ufs_mount,
1498 .kill_sb = kill_block_super,
1499 .fs_flags = FS_REQUIRES_DEV,
1500 };
1501 MODULE_ALIAS_FS("ufs");
1502
init_ufs_fs(void)1503 static int __init init_ufs_fs(void)
1504 {
1505 int err = init_inodecache();
1506 if (err)
1507 goto out1;
1508 err = register_filesystem(&ufs_fs_type);
1509 if (err)
1510 goto out;
1511 return 0;
1512 out:
1513 destroy_inodecache();
1514 out1:
1515 return err;
1516 }
1517
exit_ufs_fs(void)1518 static void __exit exit_ufs_fs(void)
1519 {
1520 unregister_filesystem(&ufs_fs_type);
1521 destroy_inodecache();
1522 }
1523
1524 module_init(init_ufs_fs)
1525 module_exit(exit_ufs_fs)
1526 MODULE_LICENSE("GPL");
1527