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pppoe: remove unnecessary checks in pppoe_flush_dev
[linux-2.6/kvm.git] / fs / ufs / super.c
blob14743d935a93f88a41691d122cc7f353fe102b17
1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gwingerde@gmail.com>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
66 */
67
68
69 #include <linux/exportfs.h>
70 #include <linux/module.h>
71 #include <linux/bitops.h>
72
73 #include <stdarg.h>
74
75 #include <asm/uaccess.h>
76 #include <asm/system.h>
77
78 #include <linux/errno.h>
79 #include <linux/fs.h>
80 #include <linux/quotaops.h>
81 #include <linux/slab.h>
82 #include <linux/time.h>
83 #include <linux/stat.h>
84 #include <linux/string.h>
85 #include <linux/blkdev.h>
86 #include <linux/init.h>
87 #include <linux/parser.h>
88 #include <linux/smp_lock.h>
89 #include <linux/buffer_head.h>
90 #include <linux/vfs.h>
91 #include <linux/log2.h>
92 #include <linux/mount.h>
93 #include <linux/seq_file.h>
94
95 #include "ufs_fs.h"
96 #include "ufs.h"
97 #include "swab.h"
98 #include "util.h"
99
100 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
101 {
102 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
103 struct inode *inode;
104
105 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
106 return ERR_PTR(-ESTALE);
107
108 inode = ufs_iget(sb, ino);
109 if (IS_ERR(inode))
110 return ERR_CAST(inode);
111 if (generation && inode->i_generation != generation) {
112 iput(inode);
113 return ERR_PTR(-ESTALE);
114 }
115 return inode;
116 }
117
118 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
119 int fh_len, int fh_type)
120 {
121 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
122 }
123
124 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
125 int fh_len, int fh_type)
126 {
127 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
128 }
129
130 static struct dentry *ufs_get_parent(struct dentry *child)
131 {
132 struct qstr dot_dot = {
133 .name = "..",
134 .len = 2,
135 };
136 ino_t ino;
137
138 ino = ufs_inode_by_name(child->d_inode, &dot_dot);
139 if (!ino)
140 return ERR_PTR(-ENOENT);
141 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
142 }
143
144 static const struct export_operations ufs_export_ops = {
145 .fh_to_dentry = ufs_fh_to_dentry,
146 .fh_to_parent = ufs_fh_to_parent,
147 .get_parent = ufs_get_parent,
148 };
149
150 #ifdef CONFIG_UFS_DEBUG
151 /*
152 * Print contents of ufs_super_block, useful for debugging
153 */
154 static void ufs_print_super_stuff(struct super_block *sb,
155 struct ufs_super_block_first *usb1,
156 struct ufs_super_block_second *usb2,
157 struct ufs_super_block_third *usb3)
158 {
159 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
160
161 printk("ufs_print_super_stuff\n");
162 printk(" magic: 0x%x\n", magic);
163 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
164 printk(" fs_size: %llu\n", (unsigned long long)
165 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
166 printk(" fs_dsize: %llu\n", (unsigned long long)
167 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
168 printk(" bsize: %u\n",
169 fs32_to_cpu(sb, usb1->fs_bsize));
170 printk(" fsize: %u\n",
171 fs32_to_cpu(sb, usb1->fs_fsize));
172 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
173 printk(" fs_sblockloc: %llu\n", (unsigned long long)
174 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
175 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
176 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
177 printk(" cs_nbfree(No of free blocks): %llu\n",
178 (unsigned long long)
179 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
180 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
181 (unsigned long long)
182 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
183 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
184 (unsigned long long)
185 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
186 printk(KERN_INFO" fs_maxsymlinklen: %u\n",
187 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
188 } else {
189 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
190 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
191 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
192 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
193 printk(" cgoffset: %u\n",
194 fs32_to_cpu(sb, usb1->fs_cgoffset));
195 printk(" ~cgmask: 0x%x\n",
196 ~fs32_to_cpu(sb, usb1->fs_cgmask));
197 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
198 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
199 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
200 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
201 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
202 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
203 printk(" fragshift: %u\n",
204 fs32_to_cpu(sb, usb1->fs_fragshift));
205 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
206 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
207 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
208 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
209 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
210 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
211 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
212 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
213 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
214 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
215 printk(" fstodb: %u\n",
216 fs32_to_cpu(sb, usb1->fs_fsbtodb));
217 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
218 printk(" ndir %u\n",
219 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
220 printk(" nifree %u\n",
221 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
222 printk(" nbfree %u\n",
223 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
224 printk(" nffree %u\n",
225 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
226 }
227 printk("\n");
228 }
229
230 /*
231 * Print contents of ufs_cylinder_group, useful for debugging
232 */
233 static void ufs_print_cylinder_stuff(struct super_block *sb,
234 struct ufs_cylinder_group *cg)
235 {
236 printk("\nufs_print_cylinder_stuff\n");
237 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
238 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
239 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
240 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
241 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
242 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
243 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
244 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
245 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
246 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
247 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
248 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
249 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
250 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
251 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
252 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
253 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
254 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
255 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
256 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
257 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
258 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
259 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
260 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
261 printk(" clustersumoff %u\n",
262 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
263 printk(" clusteroff %u\n",
264 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
265 printk(" nclusterblks %u\n",
266 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
267 printk("\n");
268 }
269 #else
270 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
271 # define ufs_print_cylinder_stuff(sb, cg) /**/
272 #endif /* CONFIG_UFS_DEBUG */
273
274 static const struct super_operations ufs_super_ops;
275
276 static char error_buf[1024];
277
278 void ufs_error (struct super_block * sb, const char * function,
279 const char * fmt, ...)
280 {
281 struct ufs_sb_private_info * uspi;
282 struct ufs_super_block_first * usb1;
283 va_list args;
284
285 uspi = UFS_SB(sb)->s_uspi;
286 usb1 = ubh_get_usb_first(uspi);
287
288 if (!(sb->s_flags & MS_RDONLY)) {
289 usb1->fs_clean = UFS_FSBAD;
290 ubh_mark_buffer_dirty(USPI_UBH(uspi));
291 sb->s_dirt = 1;
292 sb->s_flags |= MS_RDONLY;
293 }
294 va_start (args, fmt);
295 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
296 va_end (args);
297 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
298 case UFS_MOUNT_ONERROR_PANIC:
299 panic ("UFS-fs panic (device %s): %s: %s\n",
300 sb->s_id, function, error_buf);
301
302 case UFS_MOUNT_ONERROR_LOCK:
303 case UFS_MOUNT_ONERROR_UMOUNT:
304 case UFS_MOUNT_ONERROR_REPAIR:
305 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
306 sb->s_id, function, error_buf);
307 }
308 }
309
310 void ufs_panic (struct super_block * sb, const char * function,
311 const char * fmt, ...)
312 {
313 struct ufs_sb_private_info * uspi;
314 struct ufs_super_block_first * usb1;
315 va_list args;
316
317 lock_kernel();
318 uspi = UFS_SB(sb)->s_uspi;
319 usb1 = ubh_get_usb_first(uspi);
320
321 if (!(sb->s_flags & MS_RDONLY)) {
322 usb1->fs_clean = UFS_FSBAD;
323 ubh_mark_buffer_dirty(USPI_UBH(uspi));
324 sb->s_dirt = 1;
325 }
326 va_start (args, fmt);
327 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
328 va_end (args);
329 sb->s_flags |= MS_RDONLY;
330 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
331 sb->s_id, function, error_buf);
332 }
333
334 void ufs_warning (struct super_block * sb, const char * function,
335 const char * fmt, ...)
336 {
337 va_list args;
338
339 va_start (args, fmt);
340 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
341 va_end (args);
342 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
343 sb->s_id, function, error_buf);
344 }
345
346 enum {
347 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
348 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
349 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
350 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
351 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
352 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
353 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
354 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
355 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
356 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
357 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
358 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
359 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
360 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
361 Opt_err
362 };
363
364 static const match_table_t tokens = {
365 {Opt_type_old, "ufstype=old"},
366 {Opt_type_sunx86, "ufstype=sunx86"},
367 {Opt_type_sun, "ufstype=sun"},
368 {Opt_type_sunos, "ufstype=sunos"},
369 {Opt_type_44bsd, "ufstype=44bsd"},
370 {Opt_type_ufs2, "ufstype=ufs2"},
371 {Opt_type_ufs2, "ufstype=5xbsd"},
372 {Opt_type_hp, "ufstype=hp"},
373 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
374 {Opt_type_nextstep, "ufstype=nextstep"},
375 {Opt_type_openstep, "ufstype=openstep"},
376 /*end of possible ufs types */
377 {Opt_onerror_panic, "onerror=panic"},
378 {Opt_onerror_lock, "onerror=lock"},
379 {Opt_onerror_umount, "onerror=umount"},
380 {Opt_onerror_repair, "onerror=repair"},
381 {Opt_err, NULL}
382 };
383
384 static int ufs_parse_options (char * options, unsigned * mount_options)
385 {
386 char * p;
387
388 UFSD("ENTER\n");
389
390 if (!options)
391 return 1;
392
393 while ((p = strsep(&options, ",")) != NULL) {
394 substring_t args[MAX_OPT_ARGS];
395 int token;
396 if (!*p)
397 continue;
398
399 token = match_token(p, tokens, args);
400 switch (token) {
401 case Opt_type_old:
402 ufs_clear_opt (*mount_options, UFSTYPE);
403 ufs_set_opt (*mount_options, UFSTYPE_OLD);
404 break;
405 case Opt_type_sunx86:
406 ufs_clear_opt (*mount_options, UFSTYPE);
407 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
408 break;
409 case Opt_type_sun:
410 ufs_clear_opt (*mount_options, UFSTYPE);
411 ufs_set_opt (*mount_options, UFSTYPE_SUN);
412 break;
413 case Opt_type_sunos:
414 ufs_clear_opt(*mount_options, UFSTYPE);
415 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
416 break;
417 case Opt_type_44bsd:
418 ufs_clear_opt (*mount_options, UFSTYPE);
419 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
420 break;
421 case Opt_type_ufs2:
422 ufs_clear_opt(*mount_options, UFSTYPE);
423 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
424 break;
425 case Opt_type_hp:
426 ufs_clear_opt (*mount_options, UFSTYPE);
427 ufs_set_opt (*mount_options, UFSTYPE_HP);
428 break;
429 case Opt_type_nextstepcd:
430 ufs_clear_opt (*mount_options, UFSTYPE);
431 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
432 break;
433 case Opt_type_nextstep:
434 ufs_clear_opt (*mount_options, UFSTYPE);
435 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
436 break;
437 case Opt_type_openstep:
438 ufs_clear_opt (*mount_options, UFSTYPE);
439 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
440 break;
441 case Opt_onerror_panic:
442 ufs_clear_opt (*mount_options, ONERROR);
443 ufs_set_opt (*mount_options, ONERROR_PANIC);
444 break;
445 case Opt_onerror_lock:
446 ufs_clear_opt (*mount_options, ONERROR);
447 ufs_set_opt (*mount_options, ONERROR_LOCK);
448 break;
449 case Opt_onerror_umount:
450 ufs_clear_opt (*mount_options, ONERROR);
451 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
452 break;
453 case Opt_onerror_repair:
454 printk("UFS-fs: Unable to do repair on error, "
455 "will lock lock instead\n");
456 ufs_clear_opt (*mount_options, ONERROR);
457 ufs_set_opt (*mount_options, ONERROR_REPAIR);
458 break;
459 default:
460 printk("UFS-fs: Invalid option: \"%s\" "
461 "or missing value\n", p);
462 return 0;
463 }
464 }
465 return 1;
466 }
467
468 /*
469 * Diffrent types of UFS hold fs_cstotal in different
470 * places, and use diffrent data structure for it.
471 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
472 */
473 static void ufs_setup_cstotal(struct super_block *sb)
474 {
475 struct ufs_sb_info *sbi = UFS_SB(sb);
476 struct ufs_sb_private_info *uspi = sbi->s_uspi;
477 struct ufs_super_block_first *usb1;
478 struct ufs_super_block_second *usb2;
479 struct ufs_super_block_third *usb3;
480 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
481
482 UFSD("ENTER, mtype=%u\n", mtype);
483 usb1 = ubh_get_usb_first(uspi);
484 usb2 = ubh_get_usb_second(uspi);
485 usb3 = ubh_get_usb_third(uspi);
486
487 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
488 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
489 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
490 /*we have statistic in different place, then usual*/
491 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
492 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
493 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
494 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
495 } else {
496 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
497 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
498 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
499 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
500 }
501 UFSD("EXIT\n");
502 }
503
504 /*
505 * Read on-disk structures associated with cylinder groups
506 */
507 static int ufs_read_cylinder_structures(struct super_block *sb)
508 {
509 struct ufs_sb_info *sbi = UFS_SB(sb);
510 struct ufs_sb_private_info *uspi = sbi->s_uspi;
511 struct ufs_buffer_head * ubh;
512 unsigned char * base, * space;
513 unsigned size, blks, i;
514 struct ufs_super_block_third *usb3;
515
516 UFSD("ENTER\n");
517
518 usb3 = ubh_get_usb_third(uspi);
519 /*
520 * Read cs structures from (usually) first data block
521 * on the device.
522 */
523 size = uspi->s_cssize;
524 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
525 base = space = kmalloc(size, GFP_KERNEL);
526 if (!base)
527 goto failed;
528 sbi->s_csp = (struct ufs_csum *)space;
529 for (i = 0; i < blks; i += uspi->s_fpb) {
530 size = uspi->s_bsize;
531 if (i + uspi->s_fpb > blks)
532 size = (blks - i) * uspi->s_fsize;
533
534 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
535
536 if (!ubh)
537 goto failed;
538
539 ubh_ubhcpymem (space, ubh, size);
540
541 space += size;
542 ubh_brelse (ubh);
543 ubh = NULL;
544 }
545
546 /*
547 * Read cylinder group (we read only first fragment from block
548 * at this time) and prepare internal data structures for cg caching.
549 */
550 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
551 goto failed;
552 for (i = 0; i < uspi->s_ncg; i++)
553 sbi->s_ucg[i] = NULL;
554 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
555 sbi->s_ucpi[i] = NULL;
556 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
557 }
558 for (i = 0; i < uspi->s_ncg; i++) {
559 UFSD("read cg %u\n", i);
560 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
561 goto failed;
562 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
563 goto failed;
564
565 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
566 }
567 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
568 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
569 goto failed;
570 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
571 }
572 sbi->s_cg_loaded = 0;
573 UFSD("EXIT\n");
574 return 1;
575
576 failed:
577 kfree (base);
578 if (sbi->s_ucg) {
579 for (i = 0; i < uspi->s_ncg; i++)
580 if (sbi->s_ucg[i])
581 brelse (sbi->s_ucg[i]);
582 kfree (sbi->s_ucg);
583 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
584 kfree (sbi->s_ucpi[i]);
585 }
586 UFSD("EXIT (FAILED)\n");
587 return 0;
588 }
589
590 /*
591 * Sync our internal copy of fs_cstotal with disk
592 */
593 static void ufs_put_cstotal(struct super_block *sb)
594 {
595 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
596 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
597 struct ufs_super_block_first *usb1;
598 struct ufs_super_block_second *usb2;
599 struct ufs_super_block_third *usb3;
600
601 UFSD("ENTER\n");
602 usb1 = ubh_get_usb_first(uspi);
603 usb2 = ubh_get_usb_second(uspi);
604 usb3 = ubh_get_usb_third(uspi);
605
606 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
607 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
608 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
609 /*we have statistic in different place, then usual*/
610 usb2->fs_un.fs_u2.cs_ndir =
611 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
612 usb2->fs_un.fs_u2.cs_nbfree =
613 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
614 usb3->fs_un1.fs_u2.cs_nifree =
615 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
616 usb3->fs_un1.fs_u2.cs_nffree =
617 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
618 } else {
619 usb1->fs_cstotal.cs_ndir =
620 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
621 usb1->fs_cstotal.cs_nbfree =
622 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
623 usb1->fs_cstotal.cs_nifree =
624 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
625 usb1->fs_cstotal.cs_nffree =
626 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
627 }
628 ubh_mark_buffer_dirty(USPI_UBH(uspi));
629 ufs_print_super_stuff(sb, usb1, usb2, usb3);
630 UFSD("EXIT\n");
631 }
632
633 /**
634 * ufs_put_super_internal() - put on-disk intrenal structures
635 * @sb: pointer to super_block structure
636 * Put on-disk structures associated with cylinder groups
637 * and write them back to disk, also update cs_total on disk
638 */
639 static void ufs_put_super_internal(struct super_block *sb)
640 {
641 struct ufs_sb_info *sbi = UFS_SB(sb);
642 struct ufs_sb_private_info *uspi = sbi->s_uspi;
643 struct ufs_buffer_head * ubh;
644 unsigned char * base, * space;
645 unsigned blks, size, i;
646
647
648 UFSD("ENTER\n");
649
650 lock_kernel();
651
652 ufs_put_cstotal(sb);
653 size = uspi->s_cssize;
654 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
655 base = space = (char*) sbi->s_csp;
656 for (i = 0; i < blks; i += uspi->s_fpb) {
657 size = uspi->s_bsize;
658 if (i + uspi->s_fpb > blks)
659 size = (blks - i) * uspi->s_fsize;
660
661 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
662
663 ubh_memcpyubh (ubh, space, size);
664 space += size;
665 ubh_mark_buffer_uptodate (ubh, 1);
666 ubh_mark_buffer_dirty (ubh);
667 ubh_brelse (ubh);
668 }
669 for (i = 0; i < sbi->s_cg_loaded; i++) {
670 ufs_put_cylinder (sb, i);
671 kfree (sbi->s_ucpi[i]);
672 }
673 for (; i < UFS_MAX_GROUP_LOADED; i++)
674 kfree (sbi->s_ucpi[i]);
675 for (i = 0; i < uspi->s_ncg; i++)
676 brelse (sbi->s_ucg[i]);
677 kfree (sbi->s_ucg);
678 kfree (base);
679
680 unlock_kernel();
681
682 UFSD("EXIT\n");
683 }
684
685 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
686 {
687 struct ufs_sb_info * sbi;
688 struct ufs_sb_private_info * uspi;
689 struct ufs_super_block_first * usb1;
690 struct ufs_super_block_second * usb2;
691 struct ufs_super_block_third * usb3;
692 struct ufs_buffer_head * ubh;
693 struct inode *inode;
694 unsigned block_size, super_block_size;
695 unsigned flags;
696 unsigned super_block_offset;
697 unsigned maxsymlen;
698 int ret = -EINVAL;
699
700 uspi = NULL;
701 ubh = NULL;
702 flags = 0;
703
704 UFSD("ENTER\n");
705
706 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
707 if (!sbi)
708 goto failed_nomem;
709 sb->s_fs_info = sbi;
710
711 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
712
713 #ifndef CONFIG_UFS_FS_WRITE
714 if (!(sb->s_flags & MS_RDONLY)) {
715 printk("ufs was compiled with read-only support, "
716 "can't be mounted as read-write\n");
717 goto failed;
718 }
719 #endif
720 /*
721 * Set default mount options
722 * Parse mount options
723 */
724 sbi->s_mount_opt = 0;
725 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
726 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
727 printk("wrong mount options\n");
728 goto failed;
729 }
730 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
731 if (!silent)
732 printk("You didn't specify the type of your ufs filesystem\n\n"
733 "mount -t ufs -o ufstype="
734 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
735 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
736 "default is ufstype=old\n");
737 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
738 }
739
740 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
741 sbi->s_uspi = uspi;
742 if (!uspi)
743 goto failed;
744 uspi->s_dirblksize = UFS_SECTOR_SIZE;
745 super_block_offset=UFS_SBLOCK;
746
747 /* Keep 2Gig file limit. Some UFS variants need to override
748 this but as I don't know which I'll let those in the know loosen
749 the rules */
750 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
751 case UFS_MOUNT_UFSTYPE_44BSD:
752 UFSD("ufstype=44bsd\n");
753 uspi->s_fsize = block_size = 512;
754 uspi->s_fmask = ~(512 - 1);
755 uspi->s_fshift = 9;
756 uspi->s_sbsize = super_block_size = 1536;
757 uspi->s_sbbase = 0;
758 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
759 break;
760 case UFS_MOUNT_UFSTYPE_UFS2:
761 UFSD("ufstype=ufs2\n");
762 super_block_offset=SBLOCK_UFS2;
763 uspi->s_fsize = block_size = 512;
764 uspi->s_fmask = ~(512 - 1);
765 uspi->s_fshift = 9;
766 uspi->s_sbsize = super_block_size = 1536;
767 uspi->s_sbbase = 0;
768 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
769 break;
770
771 case UFS_MOUNT_UFSTYPE_SUN:
772 UFSD("ufstype=sun\n");
773 uspi->s_fsize = block_size = 1024;
774 uspi->s_fmask = ~(1024 - 1);
775 uspi->s_fshift = 10;
776 uspi->s_sbsize = super_block_size = 2048;
777 uspi->s_sbbase = 0;
778 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
779 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
780 break;
781
782 case UFS_MOUNT_UFSTYPE_SUNOS:
783 UFSD(("ufstype=sunos\n"))
784 uspi->s_fsize = block_size = 1024;
785 uspi->s_fmask = ~(1024 - 1);
786 uspi->s_fshift = 10;
787 uspi->s_sbsize = 2048;
788 super_block_size = 2048;
789 uspi->s_sbbase = 0;
790 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
791 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
792 break;
793
794 case UFS_MOUNT_UFSTYPE_SUNx86:
795 UFSD("ufstype=sunx86\n");
796 uspi->s_fsize = block_size = 1024;
797 uspi->s_fmask = ~(1024 - 1);
798 uspi->s_fshift = 10;
799 uspi->s_sbsize = super_block_size = 2048;
800 uspi->s_sbbase = 0;
801 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
802 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
803 break;
804
805 case UFS_MOUNT_UFSTYPE_OLD:
806 UFSD("ufstype=old\n");
807 uspi->s_fsize = block_size = 1024;
808 uspi->s_fmask = ~(1024 - 1);
809 uspi->s_fshift = 10;
810 uspi->s_sbsize = super_block_size = 2048;
811 uspi->s_sbbase = 0;
812 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
813 if (!(sb->s_flags & MS_RDONLY)) {
814 if (!silent)
815 printk(KERN_INFO "ufstype=old is supported read-only\n");
816 sb->s_flags |= MS_RDONLY;
817 }
818 break;
819
820 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
821 UFSD("ufstype=nextstep\n");
822 uspi->s_fsize = block_size = 1024;
823 uspi->s_fmask = ~(1024 - 1);
824 uspi->s_fshift = 10;
825 uspi->s_sbsize = super_block_size = 2048;
826 uspi->s_sbbase = 0;
827 uspi->s_dirblksize = 1024;
828 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
829 if (!(sb->s_flags & MS_RDONLY)) {
830 if (!silent)
831 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
832 sb->s_flags |= MS_RDONLY;
833 }
834 break;
835
836 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
837 UFSD("ufstype=nextstep-cd\n");
838 uspi->s_fsize = block_size = 2048;
839 uspi->s_fmask = ~(2048 - 1);
840 uspi->s_fshift = 11;
841 uspi->s_sbsize = super_block_size = 2048;
842 uspi->s_sbbase = 0;
843 uspi->s_dirblksize = 1024;
844 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
845 if (!(sb->s_flags & MS_RDONLY)) {
846 if (!silent)
847 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
848 sb->s_flags |= MS_RDONLY;
849 }
850 break;
851
852 case UFS_MOUNT_UFSTYPE_OPENSTEP:
853 UFSD("ufstype=openstep\n");
854 uspi->s_fsize = block_size = 1024;
855 uspi->s_fmask = ~(1024 - 1);
856 uspi->s_fshift = 10;
857 uspi->s_sbsize = super_block_size = 2048;
858 uspi->s_sbbase = 0;
859 uspi->s_dirblksize = 1024;
860 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
861 if (!(sb->s_flags & MS_RDONLY)) {
862 if (!silent)
863 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
864 sb->s_flags |= MS_RDONLY;
865 }
866 break;
867
868 case UFS_MOUNT_UFSTYPE_HP:
869 UFSD("ufstype=hp\n");
870 uspi->s_fsize = block_size = 1024;
871 uspi->s_fmask = ~(1024 - 1);
872 uspi->s_fshift = 10;
873 uspi->s_sbsize = super_block_size = 2048;
874 uspi->s_sbbase = 0;
875 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
876 if (!(sb->s_flags & MS_RDONLY)) {
877 if (!silent)
878 printk(KERN_INFO "ufstype=hp is supported read-only\n");
879 sb->s_flags |= MS_RDONLY;
880 }
881 break;
882 default:
883 if (!silent)
884 printk("unknown ufstype\n");
885 goto failed;
886 }
887
888 again:
889 if (!sb_set_blocksize(sb, block_size)) {
890 printk(KERN_ERR "UFS: failed to set blocksize\n");
891 goto failed;
892 }
893
894 /*
895 * read ufs super block from device
896 */
897
898 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
899
900 if (!ubh)
901 goto failed;
902
903 usb1 = ubh_get_usb_first(uspi);
904 usb2 = ubh_get_usb_second(uspi);
905 usb3 = ubh_get_usb_third(uspi);
906
907 /* Sort out mod used on SunOS 4.1.3 for fs_state */
908 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
909 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
910 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
911 flags &= ~UFS_ST_MASK;
912 flags |= UFS_ST_SUN;
913 }
914
915 /*
916 * Check ufs magic number
917 */
918 sbi->s_bytesex = BYTESEX_LE;
919 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
920 case UFS_MAGIC:
921 case UFS2_MAGIC:
922 case UFS_MAGIC_LFN:
923 case UFS_MAGIC_FEA:
924 case UFS_MAGIC_4GB:
925 goto magic_found;
926 }
927 sbi->s_bytesex = BYTESEX_BE;
928 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
929 case UFS_MAGIC:
930 case UFS2_MAGIC:
931 case UFS_MAGIC_LFN:
932 case UFS_MAGIC_FEA:
933 case UFS_MAGIC_4GB:
934 goto magic_found;
935 }
936
937 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
938 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
939 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
940 && uspi->s_sbbase < 256) {
941 ubh_brelse_uspi(uspi);
942 ubh = NULL;
943 uspi->s_sbbase += 8;
944 goto again;
945 }
946 if (!silent)
947 printk("ufs_read_super: bad magic number\n");
948 goto failed;
949
950 magic_found:
951 /*
952 * Check block and fragment sizes
953 */
954 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
955 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
956 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
957 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
958 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
959
960 if (!is_power_of_2(uspi->s_fsize)) {
961 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
962 uspi->s_fsize);
963 goto failed;
964 }
965 if (uspi->s_fsize < 512) {
966 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
967 uspi->s_fsize);
968 goto failed;
969 }
970 if (uspi->s_fsize > 4096) {
971 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
972 uspi->s_fsize);
973 goto failed;
974 }
975 if (!is_power_of_2(uspi->s_bsize)) {
976 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
977 uspi->s_bsize);
978 goto failed;
979 }
980 if (uspi->s_bsize < 4096) {
981 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
982 uspi->s_bsize);
983 goto failed;
984 }
985 if (uspi->s_bsize / uspi->s_fsize > 8) {
986 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
987 uspi->s_bsize / uspi->s_fsize);
988 goto failed;
989 }
990 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
991 ubh_brelse_uspi(uspi);
992 ubh = NULL;
993 block_size = uspi->s_fsize;
994 super_block_size = uspi->s_sbsize;
995 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
996 goto again;
997 }
998
999 sbi->s_flags = flags;/*after that line some functions use s_flags*/
1000 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1001
1002 /*
1003 * Check, if file system was correctly unmounted.
1004 * If not, make it read only.
1005 */
1006 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1007 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1008 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1009 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1010 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1011 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1012 switch(usb1->fs_clean) {
1013 case UFS_FSCLEAN:
1014 UFSD("fs is clean\n");
1015 break;
1016 case UFS_FSSTABLE:
1017 UFSD("fs is stable\n");
1018 break;
1019 case UFS_FSLOG:
1020 UFSD("fs is logging fs\n");
1021 break;
1022 case UFS_FSOSF1:
1023 UFSD("fs is DEC OSF/1\n");
1024 break;
1025 case UFS_FSACTIVE:
1026 printk("ufs_read_super: fs is active\n");
1027 sb->s_flags |= MS_RDONLY;
1028 break;
1029 case UFS_FSBAD:
1030 printk("ufs_read_super: fs is bad\n");
1031 sb->s_flags |= MS_RDONLY;
1032 break;
1033 default:
1034 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1035 sb->s_flags |= MS_RDONLY;
1036 break;
1037 }
1038 } else {
1039 printk("ufs_read_super: fs needs fsck\n");
1040 sb->s_flags |= MS_RDONLY;
1041 }
1042
1043 /*
1044 * Read ufs_super_block into internal data structures
1045 */
1046 sb->s_op = &ufs_super_ops;
1047 sb->s_export_op = &ufs_export_ops;
1048 sb->dq_op = NULL; /***/
1049 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1050
1051 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1052 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1053 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1054 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1055 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1056 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1057
1058 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1059 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1060 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1061 } else {
1062 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
1063 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
1064 }
1065
1066 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1067 /* s_bsize already set */
1068 /* s_fsize already set */
1069 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1070 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1071 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1072 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1073 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1074 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1075 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1076 uspi->s_fshift);
1077 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1078 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1079 /* s_sbsize already set */
1080 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1081 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1082 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1083 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1084 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1085 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1086 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1087 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1088
1089 if (uspi->fs_magic == UFS2_MAGIC)
1090 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1091 else
1092 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1093
1094 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1095 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1096 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1097 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1098 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1099 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1100 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1101 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1102 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1103 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1104 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1105 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1106 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1107 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1108
1109 /*
1110 * Compute another frequently used values
1111 */
1112 uspi->s_fpbmask = uspi->s_fpb - 1;
1113 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1114 uspi->s_apbshift = uspi->s_bshift - 3;
1115 else
1116 uspi->s_apbshift = uspi->s_bshift - 2;
1117
1118 uspi->s_2apbshift = uspi->s_apbshift * 2;
1119 uspi->s_3apbshift = uspi->s_apbshift * 3;
1120 uspi->s_apb = 1 << uspi->s_apbshift;
1121 uspi->s_2apb = 1 << uspi->s_2apbshift;
1122 uspi->s_3apb = 1 << uspi->s_3apbshift;
1123 uspi->s_apbmask = uspi->s_apb - 1;
1124 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1125 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1126 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1127 uspi->s_bpf = uspi->s_fsize << 3;
1128 uspi->s_bpfshift = uspi->s_fshift + 3;
1129 uspi->s_bpfmask = uspi->s_bpf - 1;
1130 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1131 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1132 uspi->s_maxsymlinklen =
1133 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1134
1135 if (uspi->fs_magic == UFS2_MAGIC)
1136 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1137 else
1138 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1139 if (uspi->s_maxsymlinklen > maxsymlen) {
1140 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1141 "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1142 uspi->s_maxsymlinklen = maxsymlen;
1143 }
1144
1145 inode = ufs_iget(sb, UFS_ROOTINO);
1146 if (IS_ERR(inode)) {
1147 ret = PTR_ERR(inode);
1148 goto failed;
1149 }
1150 sb->s_root = d_alloc_root(inode);
1151 if (!sb->s_root) {
1152 ret = -ENOMEM;
1153 goto dalloc_failed;
1154 }
1155
1156 ufs_setup_cstotal(sb);
1157 /*
1158 * Read cylinder group structures
1159 */
1160 if (!(sb->s_flags & MS_RDONLY))
1161 if (!ufs_read_cylinder_structures(sb))
1162 goto failed;
1163
1164 UFSD("EXIT\n");
1165 return 0;
1166
1167 dalloc_failed:
1168 iput(inode);
1169 failed:
1170 if (ubh)
1171 ubh_brelse_uspi (uspi);
1172 kfree (uspi);
1173 kfree(sbi);
1174 sb->s_fs_info = NULL;
1175 UFSD("EXIT (FAILED)\n");
1176 return ret;
1177
1178 failed_nomem:
1179 UFSD("EXIT (NOMEM)\n");
1180 return -ENOMEM;
1181 }
1182
1183 static int ufs_sync_fs(struct super_block *sb, int wait)
1184 {
1185 struct ufs_sb_private_info * uspi;
1186 struct ufs_super_block_first * usb1;
1187 struct ufs_super_block_third * usb3;
1188 unsigned flags;
1189
1190 lock_super(sb);
1191 lock_kernel();
1192
1193 UFSD("ENTER\n");
1194
1195 flags = UFS_SB(sb)->s_flags;
1196 uspi = UFS_SB(sb)->s_uspi;
1197 usb1 = ubh_get_usb_first(uspi);
1198 usb3 = ubh_get_usb_third(uspi);
1199
1200 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1201 if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1202 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1203 (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1204 ufs_set_fs_state(sb, usb1, usb3,
1205 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1206 ufs_put_cstotal(sb);
1207 sb->s_dirt = 0;
1208
1209 UFSD("EXIT\n");
1210 unlock_kernel();
1211 unlock_super(sb);
1212
1213 return 0;
1214 }
1215
1216 static void ufs_write_super(struct super_block *sb)
1217 {
1218 if (!(sb->s_flags & MS_RDONLY))
1219 ufs_sync_fs(sb, 1);
1220 else
1221 sb->s_dirt = 0;
1222 }
1223
1224 static void ufs_put_super(struct super_block *sb)
1225 {
1226 struct ufs_sb_info * sbi = UFS_SB(sb);
1227
1228 UFSD("ENTER\n");
1229
1230 if (sb->s_dirt)
1231 ufs_write_super(sb);
1232
1233 if (!(sb->s_flags & MS_RDONLY))
1234 ufs_put_super_internal(sb);
1235
1236 ubh_brelse_uspi (sbi->s_uspi);
1237 kfree (sbi->s_uspi);
1238 kfree (sbi);
1239 sb->s_fs_info = NULL;
1240 UFSD("EXIT\n");
1241 return;
1242 }
1243
1244
1245 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1246 {
1247 struct ufs_sb_private_info * uspi;
1248 struct ufs_super_block_first * usb1;
1249 struct ufs_super_block_third * usb3;
1250 unsigned new_mount_opt, ufstype;
1251 unsigned flags;
1252
1253 lock_kernel();
1254 lock_super(sb);
1255 uspi = UFS_SB(sb)->s_uspi;
1256 flags = UFS_SB(sb)->s_flags;
1257 usb1 = ubh_get_usb_first(uspi);
1258 usb3 = ubh_get_usb_third(uspi);
1259
1260 /*
1261 * Allow the "check" option to be passed as a remount option.
1262 * It is not possible to change ufstype option during remount
1263 */
1264 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1265 new_mount_opt = 0;
1266 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1267 if (!ufs_parse_options (data, &new_mount_opt)) {
1268 unlock_super(sb);
1269 unlock_kernel();
1270 return -EINVAL;
1271 }
1272 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1273 new_mount_opt |= ufstype;
1274 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1275 printk("ufstype can't be changed during remount\n");
1276 unlock_super(sb);
1277 unlock_kernel();
1278 return -EINVAL;
1279 }
1280
1281 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1282 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1283 unlock_super(sb);
1284 unlock_kernel();
1285 return 0;
1286 }
1287
1288 /*
1289 * fs was mouted as rw, remounting ro
1290 */
1291 if (*mount_flags & MS_RDONLY) {
1292 ufs_put_super_internal(sb);
1293 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1294 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1295 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1296 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1297 ufs_set_fs_state(sb, usb1, usb3,
1298 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1299 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1300 sb->s_dirt = 0;
1301 sb->s_flags |= MS_RDONLY;
1302 } else {
1303 /*
1304 * fs was mounted as ro, remounting rw
1305 */
1306 #ifndef CONFIG_UFS_FS_WRITE
1307 printk("ufs was compiled with read-only support, "
1308 "can't be mounted as read-write\n");
1309 unlock_super(sb);
1310 unlock_kernel();
1311 return -EINVAL;
1312 #else
1313 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1314 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1315 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1316 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1317 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1318 printk("this ufstype is read-only supported\n");
1319 unlock_super(sb);
1320 unlock_kernel();
1321 return -EINVAL;
1322 }
1323 if (!ufs_read_cylinder_structures(sb)) {
1324 printk("failed during remounting\n");
1325 unlock_super(sb);
1326 unlock_kernel();
1327 return -EPERM;
1328 }
1329 sb->s_flags &= ~MS_RDONLY;
1330 #endif
1331 }
1332 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1333 unlock_super(sb);
1334 unlock_kernel();
1335 return 0;
1336 }
1337
1338 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1339 {
1340 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1341 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1342 const struct match_token *tp = tokens;
1343
1344 while (tp->token != Opt_onerror_panic && tp->token != mval)
1345 ++tp;
1346 BUG_ON(tp->token == Opt_onerror_panic);
1347 seq_printf(seq, ",%s", tp->pattern);
1348
1349 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1350 while (tp->token != Opt_err && tp->token != mval)
1351 ++tp;
1352 BUG_ON(tp->token == Opt_err);
1353 seq_printf(seq, ",%s", tp->pattern);
1354
1355 return 0;
1356 }
1357
1358 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1359 {
1360 struct super_block *sb = dentry->d_sb;
1361 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1362 unsigned flags = UFS_SB(sb)->s_flags;
1363 struct ufs_super_block_first *usb1;
1364 struct ufs_super_block_second *usb2;
1365 struct ufs_super_block_third *usb3;
1366 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1367
1368 lock_kernel();
1369
1370 usb1 = ubh_get_usb_first(uspi);
1371 usb2 = ubh_get_usb_second(uspi);
1372 usb3 = ubh_get_usb_third(uspi);
1373
1374 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1375 buf->f_type = UFS2_MAGIC;
1376 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1377 } else {
1378 buf->f_type = UFS_MAGIC;
1379 buf->f_blocks = uspi->s_dsize;
1380 }
1381 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1382 uspi->cs_total.cs_nffree;
1383 buf->f_ffree = uspi->cs_total.cs_nifree;
1384 buf->f_bsize = sb->s_blocksize;
1385 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1386 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1387 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1388 buf->f_namelen = UFS_MAXNAMLEN;
1389 buf->f_fsid.val[0] = (u32)id;
1390 buf->f_fsid.val[1] = (u32)(id >> 32);
1391
1392 unlock_kernel();
1393
1394 return 0;
1395 }
1396
1397 static struct kmem_cache * ufs_inode_cachep;
1398
1399 static struct inode *ufs_alloc_inode(struct super_block *sb)
1400 {
1401 struct ufs_inode_info *ei;
1402 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1403 if (!ei)
1404 return NULL;
1405 ei->vfs_inode.i_version = 1;
1406 return &ei->vfs_inode;
1407 }
1408
1409 static void ufs_destroy_inode(struct inode *inode)
1410 {
1411 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1412 }
1413
1414 static void init_once(void *foo)
1415 {
1416 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1417
1418 inode_init_once(&ei->vfs_inode);
1419 }
1420
1421 static int init_inodecache(void)
1422 {
1423 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1424 sizeof(struct ufs_inode_info),
1425 0, (SLAB_RECLAIM_ACCOUNT|
1426 SLAB_MEM_SPREAD),
1427 init_once);
1428 if (ufs_inode_cachep == NULL)
1429 return -ENOMEM;
1430 return 0;
1431 }
1432
1433 static void destroy_inodecache(void)
1434 {
1435 kmem_cache_destroy(ufs_inode_cachep);
1436 }
1437
1438 static void ufs_clear_inode(struct inode *inode)
1439 {
1440 dquot_drop(inode);
1441 }
1442
1443 #ifdef CONFIG_QUOTA
1444 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1445 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1446 #endif
1447
1448 static const struct super_operations ufs_super_ops = {
1449 .alloc_inode = ufs_alloc_inode,
1450 .destroy_inode = ufs_destroy_inode,
1451 .write_inode = ufs_write_inode,
1452 .delete_inode = ufs_delete_inode,
1453 .clear_inode = ufs_clear_inode,
1454 .put_super = ufs_put_super,
1455 .write_super = ufs_write_super,
1456 .sync_fs = ufs_sync_fs,
1457 .statfs = ufs_statfs,
1458 .remount_fs = ufs_remount,
1459 .show_options = ufs_show_options,
1460 #ifdef CONFIG_QUOTA
1461 .quota_read = ufs_quota_read,
1462 .quota_write = ufs_quota_write,
1463 #endif
1464 };
1465
1466 #ifdef CONFIG_QUOTA
1467
1468 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1469 * acquiring the locks... As quota files are never truncated and quota code
1470 * itself serializes the operations (and noone else should touch the files)
1471 * we don't have to be afraid of races */
1472 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1473 size_t len, loff_t off)
1474 {
1475 struct inode *inode = sb_dqopt(sb)->files[type];
1476 sector_t blk = off >> sb->s_blocksize_bits;
1477 int err = 0;
1478 int offset = off & (sb->s_blocksize - 1);
1479 int tocopy;
1480 size_t toread;
1481 struct buffer_head *bh;
1482 loff_t i_size = i_size_read(inode);
1483
1484 if (off > i_size)
1485 return 0;
1486 if (off+len > i_size)
1487 len = i_size-off;
1488 toread = len;
1489 while (toread > 0) {
1490 tocopy = sb->s_blocksize - offset < toread ?
1491 sb->s_blocksize - offset : toread;
1492
1493 bh = ufs_bread(inode, blk, 0, &err);
1494 if (err)
1495 return err;
1496 if (!bh) /* A hole? */
1497 memset(data, 0, tocopy);
1498 else {
1499 memcpy(data, bh->b_data+offset, tocopy);
1500 brelse(bh);
1501 }
1502 offset = 0;
1503 toread -= tocopy;
1504 data += tocopy;
1505 blk++;
1506 }
1507 return len;
1508 }
1509
1510 /* Write to quotafile */
1511 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1512 const char *data, size_t len, loff_t off)
1513 {
1514 struct inode *inode = sb_dqopt(sb)->files[type];
1515 sector_t blk = off >> sb->s_blocksize_bits;
1516 int err = 0;
1517 int offset = off & (sb->s_blocksize - 1);
1518 int tocopy;
1519 size_t towrite = len;
1520 struct buffer_head *bh;
1521
1522 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1523 while (towrite > 0) {
1524 tocopy = sb->s_blocksize - offset < towrite ?
1525 sb->s_blocksize - offset : towrite;
1526
1527 bh = ufs_bread(inode, blk, 1, &err);
1528 if (!bh)
1529 goto out;
1530 lock_buffer(bh);
1531 memcpy(bh->b_data+offset, data, tocopy);
1532 flush_dcache_page(bh->b_page);
1533 set_buffer_uptodate(bh);
1534 mark_buffer_dirty(bh);
1535 unlock_buffer(bh);
1536 brelse(bh);
1537 offset = 0;
1538 towrite -= tocopy;
1539 data += tocopy;
1540 blk++;
1541 }
1542 out:
1543 if (len == towrite) {
1544 mutex_unlock(&inode->i_mutex);
1545 return err;
1546 }
1547 if (inode->i_size < off+len-towrite)
1548 i_size_write(inode, off+len-towrite);
1549 inode->i_version++;
1550 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1551 mark_inode_dirty(inode);
1552 mutex_unlock(&inode->i_mutex);
1553 return len - towrite;
1554 }
1555
1556 #endif
1557
1558 static int ufs_get_sb(struct file_system_type *fs_type,
1559 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1560 {
1561 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1562 }
1563
1564 static struct file_system_type ufs_fs_type = {
1565 .owner = THIS_MODULE,
1566 .name = "ufs",
1567 .get_sb = ufs_get_sb,
1568 .kill_sb = kill_block_super,
1569 .fs_flags = FS_REQUIRES_DEV,
1570 };
1571
1572 static int __init init_ufs_fs(void)
1573 {
1574 int err = init_inodecache();
1575 if (err)
1576 goto out1;
1577 err = register_filesystem(&ufs_fs_type);
1578 if (err)
1579 goto out;
1580 return 0;
1581 out:
1582 destroy_inodecache();
1583 out1:
1584 return err;
1585 }
1586
1587 static void __exit exit_ufs_fs(void)
1588 {
1589 unregister_filesystem(&ufs_fs_type);
1590 destroy_inodecache();
1591 }
1592
1593 module_init(init_ufs_fs)
1594 module_exit(exit_ufs_fs)
1595 MODULE_LICENSE("GPL");
kernel-based virtual machine