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Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ufs / super.c
1 /*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 /* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28 /*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gertjan@cs.vu.nl>
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 */
65
66
67 #include <linux/config.h>
68 #include <linux/module.h>
69 #include <linux/bitops.h>
70
71 #include <stdarg.h>
72
73 #include <asm/uaccess.h>
74 #include <asm/system.h>
75
76 #include <linux/errno.h>
77 #include <linux/fs.h>
78 #include <linux/ufs_fs.h>
79 #include <linux/slab.h>
80 #include <linux/time.h>
81 #include <linux/stat.h>
82 #include <linux/string.h>
83 #include <linux/blkdev.h>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/smp_lock.h>
87 #include <linux/buffer_head.h>
88 #include <linux/vfs.h>
89
90 #include "swab.h"
91 #include "util.h"
92
93 #undef UFS_SUPER_DEBUG
94 #undef UFS_SUPER_DEBUG_MORE
95
96
97 #undef UFS_SUPER_DEBUG_MORE
98 #ifdef UFS_SUPER_DEBUG
99 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
100 #else
101 #define UFSD(x)
102 #endif
103
104 #ifdef UFS_SUPER_DEBUG_MORE
105 /*
106 * Print contents of ufs_super_block, useful for debugging
107 */
108 void ufs_print_super_stuff(struct super_block *sb,
109 struct ufs_super_block_first * usb1,
110 struct ufs_super_block_second * usb2,
111 struct ufs_super_block_third * usb3)
112 {
113 printk("ufs_print_super_stuff\n");
114 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
115 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
116 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
117 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
118 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
119 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
120 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
121 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
122 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
123 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
124 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
125 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
126 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
127 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
128 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
129 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
130 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
131 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
132 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
133 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
134 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
135 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
136 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
137 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
138 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
139 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
140 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
141 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
142 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
143 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
144 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
145 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
146 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
147 printk("\n");
148 }
149
150 /*
151 * Print contents of ufs2 ufs_super_block, useful for debugging
152 */
153 void ufs2_print_super_stuff(
154 struct super_block *sb,
155 struct ufs_super_block *usb)
156 {
157 printk("ufs_print_super_stuff\n");
158 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
159 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
160 printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
161 printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
162 printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize));
163 printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize));
164 printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname);
165 printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
166 printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb,
167 usb->fs_u11.fs_u2.fs_sblockloc));
168 printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb,
169 usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
170 printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb,
171 usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
172 printk("\n");
173 }
174
175 /*
176 * Print contents of ufs_cylinder_group, useful for debugging
177 */
178 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
179 {
180 printk("\nufs_print_cylinder_stuff\n");
181 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
182 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
183 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
184 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
185 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
186 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
187 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
188 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
189 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
190 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
191 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
192 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
193 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
194 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
195 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
196 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
197 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
198 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
199 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
200 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
201 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
202 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
203 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
204 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
205 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
207 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
208 printk("\n");
209 }
210 #endif /* UFS_SUPER_DEBUG_MORE */
211
212 static struct super_operations ufs_super_ops;
213
214 static char error_buf[1024];
215
216 void ufs_error (struct super_block * sb, const char * function,
217 const char * fmt, ...)
218 {
219 struct ufs_sb_private_info * uspi;
220 struct ufs_super_block_first * usb1;
221 va_list args;
222
223 uspi = UFS_SB(sb)->s_uspi;
224 usb1 = ubh_get_usb_first(uspi);
225
226 if (!(sb->s_flags & MS_RDONLY)) {
227 usb1->fs_clean = UFS_FSBAD;
228 ubh_mark_buffer_dirty(USPI_UBH);
229 sb->s_dirt = 1;
230 sb->s_flags |= MS_RDONLY;
231 }
232 va_start (args, fmt);
233 vsprintf (error_buf, fmt, args);
234 va_end (args);
235 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
236 case UFS_MOUNT_ONERROR_PANIC:
237 panic ("UFS-fs panic (device %s): %s: %s\n",
238 sb->s_id, function, error_buf);
239
240 case UFS_MOUNT_ONERROR_LOCK:
241 case UFS_MOUNT_ONERROR_UMOUNT:
242 case UFS_MOUNT_ONERROR_REPAIR:
243 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
244 sb->s_id, function, error_buf);
245 }
246 }
247
248 void ufs_panic (struct super_block * sb, const char * function,
249 const char * fmt, ...)
250 {
251 struct ufs_sb_private_info * uspi;
252 struct ufs_super_block_first * usb1;
253 va_list args;
254
255 uspi = UFS_SB(sb)->s_uspi;
256 usb1 = ubh_get_usb_first(uspi);
257
258 if (!(sb->s_flags & MS_RDONLY)) {
259 usb1->fs_clean = UFS_FSBAD;
260 ubh_mark_buffer_dirty(USPI_UBH);
261 sb->s_dirt = 1;
262 }
263 va_start (args, fmt);
264 vsprintf (error_buf, fmt, args);
265 va_end (args);
266 sb->s_flags |= MS_RDONLY;
267 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
268 sb->s_id, function, error_buf);
269 }
270
271 void ufs_warning (struct super_block * sb, const char * function,
272 const char * fmt, ...)
273 {
274 va_list args;
275
276 va_start (args, fmt);
277 vsprintf (error_buf, fmt, args);
278 va_end (args);
279 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
280 sb->s_id, function, error_buf);
281 }
282
283 enum {
284 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
285 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
286 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
287 Opt_onerror_umount, Opt_onerror_repair, Opt_err
288 };
289
290 static match_table_t tokens = {
291 {Opt_type_old, "ufstype=old"},
292 {Opt_type_sunx86, "ufstype=sunx86"},
293 {Opt_type_sun, "ufstype=sun"},
294 {Opt_type_44bsd, "ufstype=44bsd"},
295 {Opt_type_ufs2, "ufstype=ufs2"},
296 {Opt_type_ufs2, "ufstype=5xbsd"},
297 {Opt_type_hp, "ufstype=hp"},
298 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
299 {Opt_type_nextstep, "ufstype=nextstep"},
300 {Opt_type_openstep, "ufstype=openstep"},
301 {Opt_onerror_panic, "onerror=panic"},
302 {Opt_onerror_lock, "onerror=lock"},
303 {Opt_onerror_umount, "onerror=umount"},
304 {Opt_onerror_repair, "onerror=repair"},
305 {Opt_err, NULL}
306 };
307
308 static int ufs_parse_options (char * options, unsigned * mount_options)
309 {
310 char * p;
311
312 UFSD(("ENTER\n"))
313
314 if (!options)
315 return 1;
316
317 while ((p = strsep(&options, ",")) != NULL) {
318 substring_t args[MAX_OPT_ARGS];
319 int token;
320 if (!*p)
321 continue;
322
323 token = match_token(p, tokens, args);
324 switch (token) {
325 case Opt_type_old:
326 ufs_clear_opt (*mount_options, UFSTYPE);
327 ufs_set_opt (*mount_options, UFSTYPE_OLD);
328 break;
329 case Opt_type_sunx86:
330 ufs_clear_opt (*mount_options, UFSTYPE);
331 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
332 break;
333 case Opt_type_sun:
334 ufs_clear_opt (*mount_options, UFSTYPE);
335 ufs_set_opt (*mount_options, UFSTYPE_SUN);
336 break;
337 case Opt_type_44bsd:
338 ufs_clear_opt (*mount_options, UFSTYPE);
339 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
340 break;
341 case Opt_type_ufs2:
342 ufs_clear_opt(*mount_options, UFSTYPE);
343 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
344 break;
345 case Opt_type_hp:
346 ufs_clear_opt (*mount_options, UFSTYPE);
347 ufs_set_opt (*mount_options, UFSTYPE_HP);
348 break;
349 case Opt_type_nextstepcd:
350 ufs_clear_opt (*mount_options, UFSTYPE);
351 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
352 break;
353 case Opt_type_nextstep:
354 ufs_clear_opt (*mount_options, UFSTYPE);
355 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
356 break;
357 case Opt_type_openstep:
358 ufs_clear_opt (*mount_options, UFSTYPE);
359 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
360 break;
361 case Opt_onerror_panic:
362 ufs_clear_opt (*mount_options, ONERROR);
363 ufs_set_opt (*mount_options, ONERROR_PANIC);
364 break;
365 case Opt_onerror_lock:
366 ufs_clear_opt (*mount_options, ONERROR);
367 ufs_set_opt (*mount_options, ONERROR_LOCK);
368 break;
369 case Opt_onerror_umount:
370 ufs_clear_opt (*mount_options, ONERROR);
371 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
372 break;
373 case Opt_onerror_repair:
374 printk("UFS-fs: Unable to do repair on error, "
375 "will lock lock instead\n");
376 ufs_clear_opt (*mount_options, ONERROR);
377 ufs_set_opt (*mount_options, ONERROR_REPAIR);
378 break;
379 default:
380 printk("UFS-fs: Invalid option: \"%s\" "
381 "or missing value\n", p);
382 return 0;
383 }
384 }
385 return 1;
386 }
387
388 /*
389 * Read on-disk structures associated with cylinder groups
390 */
391 static int ufs_read_cylinder_structures (struct super_block *sb) {
392 struct ufs_sb_info * sbi = UFS_SB(sb);
393 struct ufs_sb_private_info * uspi;
394 struct ufs_super_block *usb;
395 struct ufs_buffer_head * ubh;
396 unsigned char * base, * space;
397 unsigned size, blks, i;
398 unsigned flags = 0;
399
400 UFSD(("ENTER\n"))
401
402 uspi = sbi->s_uspi;
403
404 usb = (struct ufs_super_block *)
405 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
406
407 flags = UFS_SB(sb)->s_flags;
408
409 /*
410 * Read cs structures from (usually) first data block
411 * on the device.
412 */
413 size = uspi->s_cssize;
414 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
415 base = space = kmalloc(size, GFP_KERNEL);
416 if (!base)
417 goto failed;
418 for (i = 0; i < blks; i += uspi->s_fpb) {
419 size = uspi->s_bsize;
420 if (i + uspi->s_fpb > blks)
421 size = (blks - i) * uspi->s_fsize;
422
423 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
424 ubh = ubh_bread(sb,
425 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
426 else
427 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
428
429 if (!ubh)
430 goto failed;
431
432 ubh_ubhcpymem (space, ubh, size);
433 sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
434
435 space += size;
436 ubh_brelse (ubh);
437 ubh = NULL;
438 }
439
440 /*
441 * Read cylinder group (we read only first fragment from block
442 * at this time) and prepare internal data structures for cg caching.
443 */
444 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
445 goto failed;
446 for (i = 0; i < uspi->s_ncg; i++)
447 sbi->s_ucg[i] = NULL;
448 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
449 sbi->s_ucpi[i] = NULL;
450 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
451 }
452 for (i = 0; i < uspi->s_ncg; i++) {
453 UFSD(("read cg %u\n", i))
454 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
455 goto failed;
456 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
457 goto failed;
458 #ifdef UFS_SUPER_DEBUG_MORE
459 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
460 #endif
461 }
462 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
463 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
464 goto failed;
465 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
466 }
467 sbi->s_cg_loaded = 0;
468 UFSD(("EXIT\n"))
469 return 1;
470
471 failed:
472 kfree (base);
473 if (sbi->s_ucg) {
474 for (i = 0; i < uspi->s_ncg; i++)
475 if (sbi->s_ucg[i])
476 brelse (sbi->s_ucg[i]);
477 kfree (sbi->s_ucg);
478 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
479 kfree (sbi->s_ucpi[i]);
480 }
481 UFSD(("EXIT (FAILED)\n"))
482 return 0;
483 }
484
485 /*
486 * Put on-disk structures associated with cylinder groups and
487 * write them back to disk
488 */
489 static void ufs_put_cylinder_structures (struct super_block *sb) {
490 struct ufs_sb_info * sbi = UFS_SB(sb);
491 struct ufs_sb_private_info * uspi;
492 struct ufs_buffer_head * ubh;
493 unsigned char * base, * space;
494 unsigned blks, size, i;
495
496 UFSD(("ENTER\n"))
497
498 uspi = sbi->s_uspi;
499
500 size = uspi->s_cssize;
501 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
502 base = space = (char*) sbi->s_csp[0];
503 for (i = 0; i < blks; i += uspi->s_fpb) {
504 size = uspi->s_bsize;
505 if (i + uspi->s_fpb > blks)
506 size = (blks - i) * uspi->s_fsize;
507 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
508 ubh_memcpyubh (ubh, space, size);
509 space += size;
510 ubh_mark_buffer_uptodate (ubh, 1);
511 ubh_mark_buffer_dirty (ubh);
512 ubh_brelse (ubh);
513 }
514 for (i = 0; i < sbi->s_cg_loaded; i++) {
515 ufs_put_cylinder (sb, i);
516 kfree (sbi->s_ucpi[i]);
517 }
518 for (; i < UFS_MAX_GROUP_LOADED; i++)
519 kfree (sbi->s_ucpi[i]);
520 for (i = 0; i < uspi->s_ncg; i++)
521 brelse (sbi->s_ucg[i]);
522 kfree (sbi->s_ucg);
523 kfree (base);
524 UFSD(("EXIT\n"))
525 }
526
527 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
528 {
529 struct ufs_sb_info * sbi;
530 struct ufs_sb_private_info * uspi;
531 struct ufs_super_block_first * usb1;
532 struct ufs_super_block_second * usb2;
533 struct ufs_super_block_third * usb3;
534 struct ufs_super_block *usb;
535 struct ufs_buffer_head * ubh;
536 struct inode *inode;
537 unsigned block_size, super_block_size;
538 unsigned flags;
539 unsigned super_block_offset;
540
541 uspi = NULL;
542 ubh = NULL;
543 flags = 0;
544
545 UFSD(("ENTER\n"))
546
547 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
548 if (!sbi)
549 goto failed_nomem;
550 sb->s_fs_info = sbi;
551 memset(sbi, 0, sizeof(struct ufs_sb_info));
552
553 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
554
555 #ifndef CONFIG_UFS_FS_WRITE
556 if (!(sb->s_flags & MS_RDONLY)) {
557 printk("ufs was compiled with read-only support, "
558 "can't be mounted as read-write\n");
559 goto failed;
560 }
561 #endif
562 /*
563 * Set default mount options
564 * Parse mount options
565 */
566 sbi->s_mount_opt = 0;
567 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
568 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
569 printk("wrong mount options\n");
570 goto failed;
571 }
572 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
573 if (!silent)
574 printk("You didn't specify the type of your ufs filesystem\n\n"
575 "mount -t ufs -o ufstype="
576 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
577 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
578 "default is ufstype=old\n");
579 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
580 }
581
582 sbi->s_uspi = uspi =
583 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
584 if (!uspi)
585 goto failed;
586
587 super_block_offset=UFS_SBLOCK;
588
589 /* Keep 2Gig file limit. Some UFS variants need to override
590 this but as I don't know which I'll let those in the know loosen
591 the rules */
592 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
593 case UFS_MOUNT_UFSTYPE_44BSD:
594 UFSD(("ufstype=44bsd\n"))
595 uspi->s_fsize = block_size = 512;
596 uspi->s_fmask = ~(512 - 1);
597 uspi->s_fshift = 9;
598 uspi->s_sbsize = super_block_size = 1536;
599 uspi->s_sbbase = 0;
600 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
601 break;
602 case UFS_MOUNT_UFSTYPE_UFS2:
603 UFSD(("ufstype=ufs2\n"));
604 super_block_offset=SBLOCK_UFS2;
605 uspi->s_fsize = block_size = 512;
606 uspi->s_fmask = ~(512 - 1);
607 uspi->s_fshift = 9;
608 uspi->s_sbsize = super_block_size = 1536;
609 uspi->s_sbbase = 0;
610 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
611 if (!(sb->s_flags & MS_RDONLY)) {
612 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
613 sb->s_flags |= MS_RDONLY;
614 }
615 break;
616
617 case UFS_MOUNT_UFSTYPE_SUN:
618 UFSD(("ufstype=sun\n"))
619 uspi->s_fsize = block_size = 1024;
620 uspi->s_fmask = ~(1024 - 1);
621 uspi->s_fshift = 10;
622 uspi->s_sbsize = super_block_size = 2048;
623 uspi->s_sbbase = 0;
624 uspi->s_maxsymlinklen = 56;
625 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
626 break;
627
628 case UFS_MOUNT_UFSTYPE_SUNx86:
629 UFSD(("ufstype=sunx86\n"))
630 uspi->s_fsize = block_size = 1024;
631 uspi->s_fmask = ~(1024 - 1);
632 uspi->s_fshift = 10;
633 uspi->s_sbsize = super_block_size = 2048;
634 uspi->s_sbbase = 0;
635 uspi->s_maxsymlinklen = 56;
636 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
637 break;
638
639 case UFS_MOUNT_UFSTYPE_OLD:
640 UFSD(("ufstype=old\n"))
641 uspi->s_fsize = block_size = 1024;
642 uspi->s_fmask = ~(1024 - 1);
643 uspi->s_fshift = 10;
644 uspi->s_sbsize = super_block_size = 2048;
645 uspi->s_sbbase = 0;
646 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
647 if (!(sb->s_flags & MS_RDONLY)) {
648 if (!silent)
649 printk(KERN_INFO "ufstype=old is supported read-only\n");
650 sb->s_flags |= MS_RDONLY;
651 }
652 break;
653
654 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
655 UFSD(("ufstype=nextstep\n"))
656 uspi->s_fsize = block_size = 1024;
657 uspi->s_fmask = ~(1024 - 1);
658 uspi->s_fshift = 10;
659 uspi->s_sbsize = super_block_size = 2048;
660 uspi->s_sbbase = 0;
661 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
662 if (!(sb->s_flags & MS_RDONLY)) {
663 if (!silent)
664 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
665 sb->s_flags |= MS_RDONLY;
666 }
667 break;
668
669 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
670 UFSD(("ufstype=nextstep-cd\n"))
671 uspi->s_fsize = block_size = 2048;
672 uspi->s_fmask = ~(2048 - 1);
673 uspi->s_fshift = 11;
674 uspi->s_sbsize = super_block_size = 2048;
675 uspi->s_sbbase = 0;
676 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
677 if (!(sb->s_flags & MS_RDONLY)) {
678 if (!silent)
679 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
680 sb->s_flags |= MS_RDONLY;
681 }
682 break;
683
684 case UFS_MOUNT_UFSTYPE_OPENSTEP:
685 UFSD(("ufstype=openstep\n"))
686 uspi->s_fsize = block_size = 1024;
687 uspi->s_fmask = ~(1024 - 1);
688 uspi->s_fshift = 10;
689 uspi->s_sbsize = super_block_size = 2048;
690 uspi->s_sbbase = 0;
691 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
692 if (!(sb->s_flags & MS_RDONLY)) {
693 if (!silent)
694 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
695 sb->s_flags |= MS_RDONLY;
696 }
697 break;
698
699 case UFS_MOUNT_UFSTYPE_HP:
700 UFSD(("ufstype=hp\n"))
701 uspi->s_fsize = block_size = 1024;
702 uspi->s_fmask = ~(1024 - 1);
703 uspi->s_fshift = 10;
704 uspi->s_sbsize = super_block_size = 2048;
705 uspi->s_sbbase = 0;
706 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
707 if (!(sb->s_flags & MS_RDONLY)) {
708 if (!silent)
709 printk(KERN_INFO "ufstype=hp is supported read-only\n");
710 sb->s_flags |= MS_RDONLY;
711 }
712 break;
713 default:
714 if (!silent)
715 printk("unknown ufstype\n");
716 goto failed;
717 }
718
719 again:
720 if (!sb_set_blocksize(sb, block_size)) {
721 printk(KERN_ERR "UFS: failed to set blocksize\n");
722 goto failed;
723 }
724
725 /*
726 * read ufs super block from device
727 */
728
729 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
730
731 if (!ubh)
732 goto failed;
733
734
735 usb1 = ubh_get_usb_first(uspi);
736 usb2 = ubh_get_usb_second(uspi);
737 usb3 = ubh_get_usb_third(uspi);
738 usb = (struct ufs_super_block *)
739 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
740
741 /*
742 * Check ufs magic number
743 */
744 sbi->s_bytesex = BYTESEX_LE;
745 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
746 case UFS_MAGIC:
747 case UFS2_MAGIC:
748 case UFS_MAGIC_LFN:
749 case UFS_MAGIC_FEA:
750 case UFS_MAGIC_4GB:
751 goto magic_found;
752 }
753 sbi->s_bytesex = BYTESEX_BE;
754 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
755 case UFS_MAGIC:
756 case UFS2_MAGIC:
757 case UFS_MAGIC_LFN:
758 case UFS_MAGIC_FEA:
759 case UFS_MAGIC_4GB:
760 goto magic_found;
761 }
762
763 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
764 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
765 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
766 && uspi->s_sbbase < 256) {
767 ubh_brelse_uspi(uspi);
768 ubh = NULL;
769 uspi->s_sbbase += 8;
770 goto again;
771 }
772 if (!silent)
773 printk("ufs_read_super: bad magic number\n");
774 goto failed;
775
776 magic_found:
777 /*
778 * Check block and fragment sizes
779 */
780 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
781 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
782 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
783 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
784 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
785
786 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
787 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
788 uspi->s_fsize);
789 goto failed;
790 }
791 if (uspi->s_fsize < 512) {
792 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
793 uspi->s_fsize);
794 goto failed;
795 }
796 if (uspi->s_fsize > 4096) {
797 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
798 uspi->s_fsize);
799 goto failed;
800 }
801 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
802 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
803 uspi->s_bsize);
804 goto failed;
805 }
806 if (uspi->s_bsize < 4096) {
807 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
808 uspi->s_bsize);
809 goto failed;
810 }
811 if (uspi->s_bsize / uspi->s_fsize > 8) {
812 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
813 uspi->s_bsize / uspi->s_fsize);
814 goto failed;
815 }
816 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
817 ubh_brelse_uspi(uspi);
818 ubh = NULL;
819 block_size = uspi->s_fsize;
820 super_block_size = uspi->s_sbsize;
821 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
822 goto again;
823 }
824
825 #ifdef UFS_SUPER_DEBUG_MORE
826 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
827 ufs2_print_super_stuff(sb,usb);
828 else
829 ufs_print_super_stuff(sb, usb1, usb2, usb3);
830 #endif
831
832 /*
833 * Check, if file system was correctly unmounted.
834 * If not, make it read only.
835 */
836 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
837 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
838 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
839 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
840 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
841 switch(usb1->fs_clean) {
842 case UFS_FSCLEAN:
843 UFSD(("fs is clean\n"))
844 break;
845 case UFS_FSSTABLE:
846 UFSD(("fs is stable\n"))
847 break;
848 case UFS_FSOSF1:
849 UFSD(("fs is DEC OSF/1\n"))
850 break;
851 case UFS_FSACTIVE:
852 printk("ufs_read_super: fs is active\n");
853 sb->s_flags |= MS_RDONLY;
854 break;
855 case UFS_FSBAD:
856 printk("ufs_read_super: fs is bad\n");
857 sb->s_flags |= MS_RDONLY;
858 break;
859 default:
860 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
861 sb->s_flags |= MS_RDONLY;
862 break;
863 }
864 }
865 else {
866 printk("ufs_read_super: fs needs fsck\n");
867 sb->s_flags |= MS_RDONLY;
868 }
869
870 /*
871 * Read ufs_super_block into internal data structures
872 */
873 sb->s_op = &ufs_super_ops;
874 sb->dq_op = NULL; /***/
875 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
876
877 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
878 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
879 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
880 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
881 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
882 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
883
884 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
885 uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
886 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
887 }
888 else {
889 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
890 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
891 }
892
893 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
894 /* s_bsize already set */
895 /* s_fsize already set */
896 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
897 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
898 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
899 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
900 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
901 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
902 UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
903 uspi->s_fshift));
904 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
905 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
906 /* s_sbsize already set */
907 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
908 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
909 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
910 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
911 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
912 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
913 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
914 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
915 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
916 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
917 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
918 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
919 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
920 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
921 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
922 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
923 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
924 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
925 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
926 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
927 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
928 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
929 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
930 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
931
932 /*
933 * Compute another frequently used values
934 */
935 uspi->s_fpbmask = uspi->s_fpb - 1;
936 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
937 uspi->s_apbshift = uspi->s_bshift - 3;
938 }
939 else {
940 uspi->s_apbshift = uspi->s_bshift - 2;
941 }
942 uspi->s_2apbshift = uspi->s_apbshift * 2;
943 uspi->s_3apbshift = uspi->s_apbshift * 3;
944 uspi->s_apb = 1 << uspi->s_apbshift;
945 uspi->s_2apb = 1 << uspi->s_2apbshift;
946 uspi->s_3apb = 1 << uspi->s_3apbshift;
947 uspi->s_apbmask = uspi->s_apb - 1;
948 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
949 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
950 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
951 uspi->s_bpf = uspi->s_fsize << 3;
952 uspi->s_bpfshift = uspi->s_fshift + 3;
953 uspi->s_bpfmask = uspi->s_bpf - 1;
954 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
955 UFS_MOUNT_UFSTYPE_44BSD)
956 uspi->s_maxsymlinklen =
957 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
958
959 sbi->s_flags = flags;
960
961 inode = iget(sb, UFS_ROOTINO);
962 if (!inode || is_bad_inode(inode))
963 goto failed;
964 sb->s_root = d_alloc_root(inode);
965 if (!sb->s_root)
966 goto dalloc_failed;
967
968
969 /*
970 * Read cylinder group structures
971 */
972 if (!(sb->s_flags & MS_RDONLY))
973 if (!ufs_read_cylinder_structures(sb))
974 goto failed;
975
976 UFSD(("EXIT\n"))
977 return 0;
978
979 dalloc_failed:
980 iput(inode);
981 failed:
982 if (ubh)
983 ubh_brelse_uspi (uspi);
984 kfree (uspi);
985 kfree(sbi);
986 sb->s_fs_info = NULL;
987 UFSD(("EXIT (FAILED)\n"))
988 return -EINVAL;
989
990 failed_nomem:
991 UFSD(("EXIT (NOMEM)\n"))
992 return -ENOMEM;
993 }
994
995 static void ufs_write_super (struct super_block *sb) {
996 struct ufs_sb_private_info * uspi;
997 struct ufs_super_block_first * usb1;
998 struct ufs_super_block_third * usb3;
999 unsigned flags;
1000
1001 lock_kernel();
1002
1003 UFSD(("ENTER\n"))
1004 flags = UFS_SB(sb)->s_flags;
1005 uspi = UFS_SB(sb)->s_uspi;
1006 usb1 = ubh_get_usb_first(uspi);
1007 usb3 = ubh_get_usb_third(uspi);
1008
1009 if (!(sb->s_flags & MS_RDONLY)) {
1010 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1011 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1012 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1013 ufs_set_fs_state(sb, usb1, usb3,
1014 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1015 ubh_mark_buffer_dirty (USPI_UBH);
1016 }
1017 sb->s_dirt = 0;
1018 UFSD(("EXIT\n"))
1019 unlock_kernel();
1020 }
1021
1022 static void ufs_put_super (struct super_block *sb)
1023 {
1024 struct ufs_sb_info * sbi = UFS_SB(sb);
1025
1026 UFSD(("ENTER\n"))
1027
1028 if (!(sb->s_flags & MS_RDONLY))
1029 ufs_put_cylinder_structures (sb);
1030
1031 ubh_brelse_uspi (sbi->s_uspi);
1032 kfree (sbi->s_uspi);
1033 kfree (sbi);
1034 sb->s_fs_info = NULL;
1035 return;
1036 }
1037
1038
1039 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1040 {
1041 struct ufs_sb_private_info * uspi;
1042 struct ufs_super_block_first * usb1;
1043 struct ufs_super_block_third * usb3;
1044 unsigned new_mount_opt, ufstype;
1045 unsigned flags;
1046
1047 uspi = UFS_SB(sb)->s_uspi;
1048 flags = UFS_SB(sb)->s_flags;
1049 usb1 = ubh_get_usb_first(uspi);
1050 usb3 = ubh_get_usb_third(uspi);
1051
1052 /*
1053 * Allow the "check" option to be passed as a remount option.
1054 * It is not possible to change ufstype option during remount
1055 */
1056 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1057 new_mount_opt = 0;
1058 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1059 if (!ufs_parse_options (data, &new_mount_opt))
1060 return -EINVAL;
1061 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1062 new_mount_opt |= ufstype;
1063 }
1064 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1065 printk("ufstype can't be changed during remount\n");
1066 return -EINVAL;
1067 }
1068
1069 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1070 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1071 return 0;
1072 }
1073
1074 /*
1075 * fs was mouted as rw, remounting ro
1076 */
1077 if (*mount_flags & MS_RDONLY) {
1078 ufs_put_cylinder_structures(sb);
1079 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1080 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1081 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1082 ufs_set_fs_state(sb, usb1, usb3,
1083 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1084 ubh_mark_buffer_dirty (USPI_UBH);
1085 sb->s_dirt = 0;
1086 sb->s_flags |= MS_RDONLY;
1087 }
1088 /*
1089 * fs was mounted as ro, remounting rw
1090 */
1091 else {
1092 #ifndef CONFIG_UFS_FS_WRITE
1093 printk("ufs was compiled with read-only support, "
1094 "can't be mounted as read-write\n");
1095 return -EINVAL;
1096 #else
1097 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1098 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1099 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1100 printk("this ufstype is read-only supported\n");
1101 return -EINVAL;
1102 }
1103 if (!ufs_read_cylinder_structures (sb)) {
1104 printk("failed during remounting\n");
1105 return -EPERM;
1106 }
1107 sb->s_flags &= ~MS_RDONLY;
1108 #endif
1109 }
1110 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1111 return 0;
1112 }
1113
1114 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1115 {
1116 struct ufs_sb_private_info * uspi;
1117 struct ufs_super_block_first * usb1;
1118 struct ufs_super_block * usb;
1119 unsigned flags = 0;
1120
1121 lock_kernel();
1122
1123 uspi = UFS_SB(sb)->s_uspi;
1124 usb1 = ubh_get_usb_first (uspi);
1125 usb = (struct ufs_super_block *)
1126 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1127
1128 flags = UFS_SB(sb)->s_flags;
1129 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1130 buf->f_type = UFS2_MAGIC;
1131 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1132 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1133 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1134 buf->f_ffree = fs64_to_cpu(sb,
1135 usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1136 }
1137 else {
1138 buf->f_type = UFS_MAGIC;
1139 buf->f_blocks = uspi->s_dsize;
1140 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1141 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1142 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1143 }
1144 buf->f_bsize = sb->s_blocksize;
1145 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1146 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1147 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1148 buf->f_namelen = UFS_MAXNAMLEN;
1149
1150 unlock_kernel();
1151
1152 return 0;
1153 }
1154
1155 static kmem_cache_t * ufs_inode_cachep;
1156
1157 static struct inode *ufs_alloc_inode(struct super_block *sb)
1158 {
1159 struct ufs_inode_info *ei;
1160 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1161 if (!ei)
1162 return NULL;
1163 ei->vfs_inode.i_version = 1;
1164 return &ei->vfs_inode;
1165 }
1166
1167 static void ufs_destroy_inode(struct inode *inode)
1168 {
1169 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1170 }
1171
1172 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1173 {
1174 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1175
1176 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1177 SLAB_CTOR_CONSTRUCTOR)
1178 inode_init_once(&ei->vfs_inode);
1179 }
1180
1181 static int init_inodecache(void)
1182 {
1183 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1184 sizeof(struct ufs_inode_info),
1185 0, SLAB_RECLAIM_ACCOUNT,
1186 init_once, NULL);
1187 if (ufs_inode_cachep == NULL)
1188 return -ENOMEM;
1189 return 0;
1190 }
1191
1192 static void destroy_inodecache(void)
1193 {
1194 if (kmem_cache_destroy(ufs_inode_cachep))
1195 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1196 }
1197
1198 #ifdef CONFIG_QUOTA
1199 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1200 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1201 #endif
1202
1203 static struct super_operations ufs_super_ops = {
1204 .alloc_inode = ufs_alloc_inode,
1205 .destroy_inode = ufs_destroy_inode,
1206 .read_inode = ufs_read_inode,
1207 .write_inode = ufs_write_inode,
1208 .delete_inode = ufs_delete_inode,
1209 .put_super = ufs_put_super,
1210 .write_super = ufs_write_super,
1211 .statfs = ufs_statfs,
1212 .remount_fs = ufs_remount,
1213 #ifdef CONFIG_QUOTA
1214 .quota_read = ufs_quota_read,
1215 .quota_write = ufs_quota_write,
1216 #endif
1217 };
1218
1219 #ifdef CONFIG_QUOTA
1220
1221 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1222 * acquiring the locks... As quota files are never truncated and quota code
1223 * itself serializes the operations (and noone else should touch the files)
1224 * we don't have to be afraid of races */
1225 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1226 size_t len, loff_t off)
1227 {
1228 struct inode *inode = sb_dqopt(sb)->files[type];
1229 sector_t blk = off >> sb->s_blocksize_bits;
1230 int err = 0;
1231 int offset = off & (sb->s_blocksize - 1);
1232 int tocopy;
1233 size_t toread;
1234 struct buffer_head *bh;
1235 loff_t i_size = i_size_read(inode);
1236
1237 if (off > i_size)
1238 return 0;
1239 if (off+len > i_size)
1240 len = i_size-off;
1241 toread = len;
1242 while (toread > 0) {
1243 tocopy = sb->s_blocksize - offset < toread ?
1244 sb->s_blocksize - offset : toread;
1245
1246 bh = ufs_bread(inode, blk, 0, &err);
1247 if (err)
1248 return err;
1249 if (!bh) /* A hole? */
1250 memset(data, 0, tocopy);
1251 else {
1252 memcpy(data, bh->b_data+offset, tocopy);
1253 brelse(bh);
1254 }
1255 offset = 0;
1256 toread -= tocopy;
1257 data += tocopy;
1258 blk++;
1259 }
1260 return len;
1261 }
1262
1263 /* Write to quotafile */
1264 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1265 const char *data, size_t len, loff_t off)
1266 {
1267 struct inode *inode = sb_dqopt(sb)->files[type];
1268 sector_t blk = off >> sb->s_blocksize_bits;
1269 int err = 0;
1270 int offset = off & (sb->s_blocksize - 1);
1271 int tocopy;
1272 size_t towrite = len;
1273 struct buffer_head *bh;
1274
1275 mutex_lock(&inode->i_mutex);
1276 while (towrite > 0) {
1277 tocopy = sb->s_blocksize - offset < towrite ?
1278 sb->s_blocksize - offset : towrite;
1279
1280 bh = ufs_bread(inode, blk, 1, &err);
1281 if (!bh)
1282 goto out;
1283 lock_buffer(bh);
1284 memcpy(bh->b_data+offset, data, tocopy);
1285 flush_dcache_page(bh->b_page);
1286 set_buffer_uptodate(bh);
1287 mark_buffer_dirty(bh);
1288 unlock_buffer(bh);
1289 brelse(bh);
1290 offset = 0;
1291 towrite -= tocopy;
1292 data += tocopy;
1293 blk++;
1294 }
1295 out:
1296 if (len == towrite) {
1297 mutex_unlock(&inode->i_mutex);
1298 return err;
1299 }
1300 if (inode->i_size < off+len-towrite)
1301 i_size_write(inode, off+len-towrite);
1302 inode->i_version++;
1303 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1304 mark_inode_dirty(inode);
1305 mutex_unlock(&inode->i_mutex);
1306 return len - towrite;
1307 }
1308
1309 #endif
1310
1311 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1312 int flags, const char *dev_name, void *data)
1313 {
1314 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1315 }
1316
1317 static struct file_system_type ufs_fs_type = {
1318 .owner = THIS_MODULE,
1319 .name = "ufs",
1320 .get_sb = ufs_get_sb,
1321 .kill_sb = kill_block_super,
1322 .fs_flags = FS_REQUIRES_DEV,
1323 };
1324
1325 static int __init init_ufs_fs(void)
1326 {
1327 int err = init_inodecache();
1328 if (err)
1329 goto out1;
1330 err = register_filesystem(&ufs_fs_type);
1331 if (err)
1332 goto out;
1333 return 0;
1334 out:
1335 destroy_inodecache();
1336 out1:
1337 return err;
1338 }
1339
1340 static void __exit exit_ufs_fs(void)
1341 {
1342 unregister_filesystem(&ufs_fs_type);
1343 destroy_inodecache();
1344 }
1345
1346 module_init(init_ufs_fs)
1347 module_exit(exit_ufs_fs)
1348 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)