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[PATCH] Add a driver for the Technisat Skystar2 DVB card
[linux-2.6/history.git] / fs / ufs / super.c
blob802ca517153e1dbbf832343073bdaed55081c09b
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 */
62
63
64 #include <linux/config.h>
65 #include <linux/module.h>
66
67 #include <stdarg.h>
68
69 #include <asm/bitops.h>
70 #include <asm/uaccess.h>
71 #include <asm/system.h>
72
73 #include <linux/errno.h>
74 #include <linux/fs.h>
75 #include <linux/ufs_fs.h>
76 #include <linux/slab.h>
77 #include <linux/time.h>
78 #include <linux/stat.h>
79 #include <linux/string.h>
80 #include <linux/blkdev.h>
81 #include <linux/init.h>
82 #include <linux/smp_lock.h>
83 #include <linux/buffer_head.h>
84 #include <linux/vfs.h>
85
86 #include "swab.h"
87 #include "util.h"
88
89 #undef UFS_SUPER_DEBUG
90 #undef UFS_SUPER_DEBUG_MORE
91
92 #ifdef UFS_SUPER_DEBUG
93 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
94 #else
95 #define UFSD(x)
96 #endif
97
98 #ifdef UFS_SUPER_DEBUG_MORE
99 /*
100 * Print contents of ufs_super_block, useful for debugging
101 */
102 void ufs_print_super_stuff(struct super_block *sb,
103 struct ufs_super_block_first * usb1,
104 struct ufs_super_block_second * usb2,
105 struct ufs_super_block_third * usb3)
106 {
107 printk("ufs_print_super_stuff\n");
108 printk("size of usb: %u\n", sizeof(struct ufs_super_block));
109 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
110 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
111 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
112 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
113 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
114 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
115 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
116 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
117 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
118 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
119 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
120 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
121 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
122 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
123 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
124 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
125 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
126 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
127 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
128 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
129 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
130 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
131 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
132 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
133 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
134 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
135 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
136 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
137 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
138 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
139 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
140 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
141 printk("\n");
142 }
143
144
145 /*
146 * Print contents of ufs_cylinder_group, useful for debugging
147 */
148 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
149 {
150 printk("\nufs_print_cylinder_stuff\n");
151 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
152 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
153 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
154 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
155 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
156 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
157 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
158 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
159 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
160 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
161 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
162 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
163 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
164 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
165 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
166 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
167 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
168 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
169 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
170 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
171 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
172 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
173 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
174 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
175 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
176 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
177 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
178 printk("\n");
179 }
180 #endif /* UFS_SUPER_DEBUG_MORE */
181
182 static struct super_operations ufs_super_ops;
183
184 static char error_buf[1024];
185
186 void ufs_error (struct super_block * sb, const char * function,
187 const char * fmt, ...)
188 {
189 struct ufs_sb_private_info * uspi;
190 struct ufs_super_block_first * usb1;
191 va_list args;
192
193 uspi = UFS_SB(sb)->s_uspi;
194 usb1 = ubh_get_usb_first(USPI_UBH);
195
196 if (!(sb->s_flags & MS_RDONLY)) {
197 usb1->fs_clean = UFS_FSBAD;
198 ubh_mark_buffer_dirty(USPI_UBH);
199 sb->s_dirt = 1;
200 sb->s_flags |= MS_RDONLY;
201 }
202 va_start (args, fmt);
203 vsprintf (error_buf, fmt, args);
204 va_end (args);
205 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
206 case UFS_MOUNT_ONERROR_PANIC:
207 panic ("UFS-fs panic (device %s): %s: %s\n",
208 sb->s_id, function, error_buf);
209
210 case UFS_MOUNT_ONERROR_LOCK:
211 case UFS_MOUNT_ONERROR_UMOUNT:
212 case UFS_MOUNT_ONERROR_REPAIR:
213 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
214 sb->s_id, function, error_buf);
215 }
216 }
217
218 void ufs_panic (struct super_block * sb, const char * function,
219 const char * fmt, ...)
220 {
221 struct ufs_sb_private_info * uspi;
222 struct ufs_super_block_first * usb1;
223 va_list args;
224
225 uspi = UFS_SB(sb)->s_uspi;
226 usb1 = ubh_get_usb_first(USPI_UBH);
227
228 if (!(sb->s_flags & MS_RDONLY)) {
229 usb1->fs_clean = UFS_FSBAD;
230 ubh_mark_buffer_dirty(USPI_UBH);
231 sb->s_dirt = 1;
232 }
233 va_start (args, fmt);
234 vsprintf (error_buf, fmt, args);
235 va_end (args);
236 sb->s_flags |= MS_RDONLY;
237 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
238 sb->s_id, function, error_buf);
239 }
240
241 void ufs_warning (struct super_block * sb, const char * function,
242 const char * fmt, ...)
243 {
244 va_list args;
245
246 va_start (args, fmt);
247 vsprintf (error_buf, fmt, args);
248 va_end (args);
249 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
250 sb->s_id, function, error_buf);
251 }
252
253 static int ufs_parse_options (char * options, unsigned * mount_options)
254 {
255 char * this_char;
256 char * value;
257
258 UFSD(("ENTER\n"))
259
260 if (!options)
261 return 1;
262
263 while ((this_char = strsep (&options, ",")) != NULL) {
264 if (!*this_char)
265 continue;
266 if ((value = strchr (this_char, '=')) != NULL)
267 *value++ = 0;
268 if (!strcmp (this_char, "ufstype")) {
269 ufs_clear_opt (*mount_options, UFSTYPE);
270 if (!strcmp (value, "old"))
271 ufs_set_opt (*mount_options, UFSTYPE_OLD);
272 else if (!strcmp (value, "sun"))
273 ufs_set_opt (*mount_options, UFSTYPE_SUN);
274 else if (!strcmp (value, "44bsd"))
275 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
276 else if (!strcmp (value, "nextstep"))
277 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
278 else if (!strcmp (value, "nextstep-cd"))
279 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
280 else if (!strcmp (value, "openstep"))
281 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
282 else if (!strcmp (value, "sunx86"))
283 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
284 else if (!strcmp (value, "hp"))
285 ufs_set_opt (*mount_options, UFSTYPE_HP);
286 else {
287 printk ("UFS-fs: Invalid type option: %s\n", value);
288 return 0;
289 }
290 }
291 else if (!strcmp (this_char, "onerror")) {
292 ufs_clear_opt (*mount_options, ONERROR);
293 if (!strcmp (value, "panic"))
294 ufs_set_opt (*mount_options, ONERROR_PANIC);
295 else if (!strcmp (value, "lock"))
296 ufs_set_opt (*mount_options, ONERROR_LOCK);
297 else if (!strcmp (value, "umount"))
298 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
299 else if (!strcmp (value, "repair")) {
300 printk("UFS-fs: Unable to do repair on error, "
301 "will lock lock instead \n");
302 ufs_set_opt (*mount_options, ONERROR_REPAIR);
303 }
304 else {
305 printk ("UFS-fs: Invalid action onerror: %s\n", value);
306 return 0;
307 }
308 }
309 else {
310 printk("UFS-fs: Invalid option: %s\n", this_char);
311 return 0;
312 }
313 }
314 return 1;
315 }
316
317 /*
318 * Read on-disk structures associated with cylinder groups
319 */
320 int ufs_read_cylinder_structures (struct super_block * sb) {
321 struct ufs_sb_info * sbi = UFS_SB(sb);
322 struct ufs_sb_private_info * uspi;
323 struct ufs_buffer_head * ubh;
324 unsigned char * base, * space;
325 unsigned size, blks, i;
326
327 UFSD(("ENTER\n"))
328
329 uspi = sbi->s_uspi;
330
331 /*
332 * Read cs structures from (usually) first data block
333 * on the device.
334 */
335 size = uspi->s_cssize;
336 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
337 base = space = kmalloc(size, GFP_KERNEL);
338 if (!base)
339 goto failed;
340 for (i = 0; i < blks; i += uspi->s_fpb) {
341 size = uspi->s_bsize;
342 if (i + uspi->s_fpb > blks)
343 size = (blks - i) * uspi->s_fsize;
344 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
345 if (!ubh)
346 goto failed;
347 ubh_ubhcpymem (space, ubh, size);
348 sbi->s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space;
349 space += size;
350 ubh_brelse (ubh);
351 ubh = NULL;
352 }
353
354 /*
355 * Read cylinder group (we read only first fragment from block
356 * at this time) and prepare internal data structures for cg caching.
357 */
358 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
359 goto failed;
360 for (i = 0; i < uspi->s_ncg; i++)
361 sbi->s_ucg[i] = NULL;
362 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
363 sbi->s_ucpi[i] = NULL;
364 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
365 }
366 for (i = 0; i < uspi->s_ncg; i++) {
367 UFSD(("read cg %u\n", i))
368 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
369 goto failed;
370 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
371 goto failed;
372 #ifdef UFS_SUPER_DEBUG_MORE
373 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
374 #endif
375 }
376 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
377 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
378 goto failed;
379 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
380 }
381 sbi->s_cg_loaded = 0;
382 UFSD(("EXIT\n"))
383 return 1;
384
385 failed:
386 if (base) kfree (base);
387 if (sbi->s_ucg) {
388 for (i = 0; i < uspi->s_ncg; i++)
389 if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]);
390 kfree (sbi->s_ucg);
391 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
392 if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]);
393 }
394 UFSD(("EXIT (FAILED)\n"))
395 return 0;
396 }
397
398 /*
399 * Put on-disk structures associated with cylinder groups and
400 * write them back to disk
401 */
402 void ufs_put_cylinder_structures (struct super_block * sb) {
403 struct ufs_sb_info * sbi = UFS_SB(sb);
404 struct ufs_sb_private_info * uspi;
405 struct ufs_buffer_head * ubh;
406 unsigned char * base, * space;
407 unsigned blks, size, i;
408
409 UFSD(("ENTER\n"))
410
411 uspi = sbi->s_uspi;
412
413 size = uspi->s_cssize;
414 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
415 base = space = (char*) sbi->s_csp[0];
416 for (i = 0; i < blks; i += uspi->s_fpb) {
417 size = uspi->s_bsize;
418 if (i + uspi->s_fpb > blks)
419 size = (blks - i) * uspi->s_fsize;
420 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
421 ubh_memcpyubh (ubh, space, size);
422 space += size;
423 ubh_mark_buffer_uptodate (ubh, 1);
424 ubh_mark_buffer_dirty (ubh);
425 ubh_brelse (ubh);
426 }
427 for (i = 0; i < sbi->s_cg_loaded; i++) {
428 ufs_put_cylinder (sb, i);
429 kfree (sbi->s_ucpi[i]);
430 }
431 for (; i < UFS_MAX_GROUP_LOADED; i++)
432 kfree (sbi->s_ucpi[i]);
433 for (i = 0; i < uspi->s_ncg; i++)
434 brelse (sbi->s_ucg[i]);
435 kfree (sbi->s_ucg);
436 kfree (base);
437 UFSD(("EXIT\n"))
438 }
439
440 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
441 {
442 struct ufs_sb_info * sbi;
443 struct ufs_sb_private_info * uspi;
444 struct ufs_super_block_first * usb1;
445 struct ufs_super_block_second * usb2;
446 struct ufs_super_block_third * usb3;
447 struct ufs_buffer_head * ubh;
448 struct inode *inode;
449 unsigned block_size, super_block_size;
450 unsigned flags;
451
452 uspi = NULL;
453 ubh = NULL;
454 flags = 0;
455
456 UFSD(("ENTER\n"))
457
458 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
459 if (!sbi)
460 goto failed_nomem;
461 sb->s_fs_info = sbi;
462 memset(sbi, 0, sizeof(struct ufs_sb_info));
463
464 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
465
466 #ifndef CONFIG_UFS_FS_WRITE
467 if (!(sb->s_flags & MS_RDONLY)) {
468 printk("ufs was compiled with read-only support, "
469 "can't be mounted as read-write\n");
470 goto failed;
471 }
472 #endif
473 /*
474 * Set default mount options
475 * Parse mount options
476 */
477 sbi->s_mount_opt = 0;
478 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
479 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
480 printk("wrong mount options\n");
481 goto failed;
482 }
483 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
484 printk("You didn't specify the type of your ufs filesystem\n\n"
485 "mount -t ufs -o ufstype="
486 "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
487 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
488 "default is ufstype=old\n");
489 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
490 }
491
492 sbi->s_uspi = uspi =
493 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
494 if (!uspi)
495 goto failed;
496
497 /* Keep 2Gig file limit. Some UFS variants need to override
498 this but as I don't know which I'll let those in the know loosen
499 the rules */
500
501 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
502 case UFS_MOUNT_UFSTYPE_44BSD:
503 UFSD(("ufstype=44bsd\n"))
504 uspi->s_fsize = block_size = 512;
505 uspi->s_fmask = ~(512 - 1);
506 uspi->s_fshift = 9;
507 uspi->s_sbsize = super_block_size = 1536;
508 uspi->s_sbbase = 0;
509 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
510 break;
511
512 case UFS_MOUNT_UFSTYPE_SUN:
513 UFSD(("ufstype=sun\n"))
514 uspi->s_fsize = block_size = 1024;
515 uspi->s_fmask = ~(1024 - 1);
516 uspi->s_fshift = 10;
517 uspi->s_sbsize = super_block_size = 2048;
518 uspi->s_sbbase = 0;
519 uspi->s_maxsymlinklen = 56;
520 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
521 break;
522
523 case UFS_MOUNT_UFSTYPE_SUNx86:
524 UFSD(("ufstype=sunx86\n"))
525 uspi->s_fsize = block_size = 1024;
526 uspi->s_fmask = ~(1024 - 1);
527 uspi->s_fshift = 10;
528 uspi->s_sbsize = super_block_size = 2048;
529 uspi->s_sbbase = 0;
530 uspi->s_maxsymlinklen = 56;
531 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
532 break;
533
534 case UFS_MOUNT_UFSTYPE_OLD:
535 UFSD(("ufstype=old\n"))
536 uspi->s_fsize = block_size = 1024;
537 uspi->s_fmask = ~(1024 - 1);
538 uspi->s_fshift = 10;
539 uspi->s_sbsize = super_block_size = 2048;
540 uspi->s_sbbase = 0;
541 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
542 if (!(sb->s_flags & MS_RDONLY)) {
543 printk(KERN_INFO "ufstype=old is supported read-only\n");
544 sb->s_flags |= MS_RDONLY;
545 }
546 break;
547
548 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
549 UFSD(("ufstype=nextstep\n"))
550 uspi->s_fsize = block_size = 1024;
551 uspi->s_fmask = ~(1024 - 1);
552 uspi->s_fshift = 10;
553 uspi->s_sbsize = super_block_size = 2048;
554 uspi->s_sbbase = 0;
555 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
556 if (!(sb->s_flags & MS_RDONLY)) {
557 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
558 sb->s_flags |= MS_RDONLY;
559 }
560 break;
561
562 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
563 UFSD(("ufstype=nextstep-cd\n"))
564 uspi->s_fsize = block_size = 2048;
565 uspi->s_fmask = ~(2048 - 1);
566 uspi->s_fshift = 11;
567 uspi->s_sbsize = super_block_size = 2048;
568 uspi->s_sbbase = 0;
569 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
570 if (!(sb->s_flags & MS_RDONLY)) {
571 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
572 sb->s_flags |= MS_RDONLY;
573 }
574 break;
575
576 case UFS_MOUNT_UFSTYPE_OPENSTEP:
577 UFSD(("ufstype=openstep\n"))
578 uspi->s_fsize = block_size = 1024;
579 uspi->s_fmask = ~(1024 - 1);
580 uspi->s_fshift = 10;
581 uspi->s_sbsize = super_block_size = 2048;
582 uspi->s_sbbase = 0;
583 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
584 if (!(sb->s_flags & MS_RDONLY)) {
585 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
586 sb->s_flags |= MS_RDONLY;
587 }
588 break;
589
590 case UFS_MOUNT_UFSTYPE_HP:
591 UFSD(("ufstype=hp\n"))
592 uspi->s_fsize = block_size = 1024;
593 uspi->s_fmask = ~(1024 - 1);
594 uspi->s_fshift = 10;
595 uspi->s_sbsize = super_block_size = 2048;
596 uspi->s_sbbase = 0;
597 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
598 if (!(sb->s_flags & MS_RDONLY)) {
599 printk(KERN_INFO "ufstype=hp is supported read-only\n");
600 sb->s_flags |= MS_RDONLY;
601 }
602 break;
603 default:
604 printk("unknown ufstype\n");
605 goto failed;
606 }
607
608 again:
609 if (!sb_set_blocksize(sb, block_size)) {
610 printk(KERN_ERR "UFS: failed to set blocksize\n");
611 goto failed;
612 }
613
614 /*
615 * read ufs super block from device
616 */
617 ubh = ubh_bread_uspi (uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
618 if (!ubh)
619 goto failed;
620
621 usb1 = ubh_get_usb_first(USPI_UBH);
622 usb2 = ubh_get_usb_second(USPI_UBH);
623 usb3 = ubh_get_usb_third(USPI_UBH);
624
625 /*
626 * Check ufs magic number
627 */
628 switch (__constant_le32_to_cpu(usb3->fs_magic)) {
629 case UFS_MAGIC:
630 case UFS_MAGIC_LFN:
631 case UFS_MAGIC_FEA:
632 case UFS_MAGIC_4GB:
633 sbi->s_bytesex = BYTESEX_LE;
634 goto magic_found;
635 }
636 switch (__constant_be32_to_cpu(usb3->fs_magic)) {
637 case UFS_MAGIC:
638 case UFS_MAGIC_LFN:
639 case UFS_MAGIC_FEA:
640 case UFS_MAGIC_4GB:
641 sbi->s_bytesex = BYTESEX_BE;
642 goto magic_found;
643 }
644
645 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
646 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
647 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
648 && uspi->s_sbbase < 256) {
649 ubh_brelse_uspi(uspi);
650 ubh = NULL;
651 uspi->s_sbbase += 8;
652 goto again;
653 }
654 printk("ufs_read_super: bad magic number\n");
655 goto failed;
656
657 magic_found:
658 /*
659 * Check block and fragment sizes
660 */
661 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
662 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
663 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
664 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
665 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
666
667 if (uspi->s_fsize & (uspi->s_fsize - 1)) {
668 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
669 uspi->s_fsize);
670 goto failed;
671 }
672 if (uspi->s_fsize < 512) {
673 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
674 uspi->s_fsize);
675 goto failed;
676 }
677 if (uspi->s_fsize > 4096) {
678 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
679 uspi->s_fsize);
680 goto failed;
681 }
682 if (uspi->s_bsize & (uspi->s_bsize - 1)) {
683 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
684 uspi->s_bsize);
685 goto failed;
686 }
687 if (uspi->s_bsize < 4096) {
688 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
689 uspi->s_bsize);
690 goto failed;
691 }
692 if (uspi->s_bsize / uspi->s_fsize > 8) {
693 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
694 uspi->s_bsize / uspi->s_fsize);
695 goto failed;
696 }
697 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
698 ubh_brelse_uspi(uspi);
699 ubh = NULL;
700 block_size = uspi->s_fsize;
701 super_block_size = uspi->s_sbsize;
702 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
703 goto again;
704 }
705
706 #ifdef UFS_SUPER_DEBUG_MORE
707 ufs_print_super_stuff(sb, usb1, usb2, usb3);
708 #endif
709
710 /*
711 * Check, if file system was correctly unmounted.
712 * If not, make it read only.
713 */
714 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
715 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
716 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
717 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
718 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
719 switch(usb1->fs_clean) {
720 case UFS_FSCLEAN:
721 UFSD(("fs is clean\n"))
722 break;
723 case UFS_FSSTABLE:
724 UFSD(("fs is stable\n"))
725 break;
726 case UFS_FSOSF1:
727 UFSD(("fs is DEC OSF/1\n"))
728 break;
729 case UFS_FSACTIVE:
730 printk("ufs_read_super: fs is active\n");
731 sb->s_flags |= MS_RDONLY;
732 break;
733 case UFS_FSBAD:
734 printk("ufs_read_super: fs is bad\n");
735 sb->s_flags |= MS_RDONLY;
736 break;
737 default:
738 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
739 sb->s_flags |= MS_RDONLY;
740 break;
741 }
742 }
743 else {
744 printk("ufs_read_super: fs needs fsck\n");
745 sb->s_flags |= MS_RDONLY;
746 }
747
748 /*
749 * Read ufs_super_block into internal data structures
750 */
751 sb->s_op = &ufs_super_ops;
752 sb->dq_op = NULL; /***/
753 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
754
755 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
756 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
757 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
758 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
759 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
760 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
761 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
762 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
763 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
764 /* s_bsize already set */
765 /* s_fsize already set */
766 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
767 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
768 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
769 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
770 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
771 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
772 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
773 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
774 /* s_sbsize already set */
775 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
776 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
777 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
778 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
779 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
780 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
781 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
782 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
783 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
784 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
785 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
786 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
787 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
788 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
789 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
790 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
791 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
792 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
793 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
794 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
795 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
796 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
797 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
798 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
799
800 /*
801 * Compute another frequently used values
802 */
803 uspi->s_fpbmask = uspi->s_fpb - 1;
804 uspi->s_apbshift = uspi->s_bshift - 2;
805 uspi->s_2apbshift = uspi->s_apbshift * 2;
806 uspi->s_3apbshift = uspi->s_apbshift * 3;
807 uspi->s_apb = 1 << uspi->s_apbshift;
808 uspi->s_2apb = 1 << uspi->s_2apbshift;
809 uspi->s_3apb = 1 << uspi->s_3apbshift;
810 uspi->s_apbmask = uspi->s_apb - 1;
811 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
812 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
813 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
814 uspi->s_bpf = uspi->s_fsize << 3;
815 uspi->s_bpfshift = uspi->s_fshift + 3;
816 uspi->s_bpfmask = uspi->s_bpf - 1;
817 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
818 UFS_MOUNT_UFSTYPE_44BSD)
819 uspi->s_maxsymlinklen =
820 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
821
822 sbi->s_flags = flags;
823
824 inode = iget(sb, UFS_ROOTINO);
825 if (!inode || is_bad_inode(inode))
826 goto failed;
827 sb->s_root = d_alloc_root(inode);
828 if (!sb->s_root)
829 goto dalloc_failed;
830
831
832 /*
833 * Read cylinder group structures
834 */
835 if (!(sb->s_flags & MS_RDONLY))
836 if (!ufs_read_cylinder_structures(sb))
837 goto failed;
838
839 UFSD(("EXIT\n"))
840 return 0;
841
842 dalloc_failed:
843 iput(inode);
844 failed:
845 if (ubh) ubh_brelse_uspi (uspi);
846 if (uspi) kfree (uspi);
847 if (sbi) kfree(sbi);
848 sb->s_fs_info = NULL;
849 UFSD(("EXIT (FAILED)\n"))
850 return -EINVAL;
851
852 failed_nomem:
853 UFSD(("EXIT (NOMEM)\n"))
854 return -ENOMEM;
855 }
856
857 void ufs_write_super (struct super_block * sb) {
858 struct ufs_sb_private_info * uspi;
859 struct ufs_super_block_first * usb1;
860 struct ufs_super_block_third * usb3;
861 unsigned flags;
862
863 lock_kernel();
864
865 UFSD(("ENTER\n"))
866 flags = UFS_SB(sb)->s_flags;
867 uspi = UFS_SB(sb)->s_uspi;
868 usb1 = ubh_get_usb_first(USPI_UBH);
869 usb3 = ubh_get_usb_third(USPI_UBH);
870
871 if (!(sb->s_flags & MS_RDONLY)) {
872 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
873 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
874 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
875 ufs_set_fs_state(sb, usb1, usb3,
876 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
877 ubh_mark_buffer_dirty (USPI_UBH);
878 }
879 sb->s_dirt = 0;
880 UFSD(("EXIT\n"))
881 unlock_kernel();
882 }
883
884 void ufs_put_super (struct super_block * sb)
885 {
886 struct ufs_sb_info * sbi = UFS_SB(sb);
887
888 UFSD(("ENTER\n"))
889
890 if (!(sb->s_flags & MS_RDONLY))
891 ufs_put_cylinder_structures (sb);
892
893 ubh_brelse_uspi (sbi->s_uspi);
894 kfree (sbi->s_uspi);
895 kfree (sbi);
896 sb->s_fs_info = NULL;
897 return;
898 }
899
900
901 int ufs_remount (struct super_block * sb, int * mount_flags, char * data)
902 {
903 struct ufs_sb_private_info * uspi;
904 struct ufs_super_block_first * usb1;
905 struct ufs_super_block_third * usb3;
906 unsigned new_mount_opt, ufstype;
907 unsigned flags;
908
909 uspi = UFS_SB(sb)->s_uspi;
910 flags = UFS_SB(sb)->s_flags;
911 usb1 = ubh_get_usb_first(USPI_UBH);
912 usb3 = ubh_get_usb_third(USPI_UBH);
913
914 /*
915 * Allow the "check" option to be passed as a remount option.
916 * It is not possible to change ufstype option during remount
917 */
918 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
919 new_mount_opt = 0;
920 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
921 if (!ufs_parse_options (data, &new_mount_opt))
922 return -EINVAL;
923 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
924 new_mount_opt |= ufstype;
925 }
926 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
927 printk("ufstype can't be changed during remount\n");
928 return -EINVAL;
929 }
930
931 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
932 UFS_SB(sb)->s_mount_opt = new_mount_opt;
933 return 0;
934 }
935
936 /*
937 * fs was mouted as rw, remounting ro
938 */
939 if (*mount_flags & MS_RDONLY) {
940 ufs_put_cylinder_structures(sb);
941 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
942 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
943 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
944 ufs_set_fs_state(sb, usb1, usb3,
945 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
946 ubh_mark_buffer_dirty (USPI_UBH);
947 sb->s_dirt = 0;
948 sb->s_flags |= MS_RDONLY;
949 }
950 /*
951 * fs was mounted as ro, remounting rw
952 */
953 else {
954 #ifndef CONFIG_UFS_FS_WRITE
955 printk("ufs was compiled with read-only support, "
956 "can't be mounted as read-write\n");
957 return -EINVAL;
958 #else
959 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
960 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
961 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
962 printk("this ufstype is read-only supported\n");
963 return -EINVAL;
964 }
965 if (!ufs_read_cylinder_structures (sb)) {
966 printk("failed during remounting\n");
967 return -EPERM;
968 }
969 sb->s_flags &= ~MS_RDONLY;
970 #endif
971 }
972 UFS_SB(sb)->s_mount_opt = new_mount_opt;
973 return 0;
974 }
975
976 int ufs_statfs (struct super_block * sb, struct kstatfs * buf)
977 {
978 struct ufs_sb_private_info * uspi;
979 struct ufs_super_block_first * usb1;
980
981 lock_kernel();
982
983 uspi = UFS_SB(sb)->s_uspi;
984 usb1 = ubh_get_usb_first (USPI_UBH);
985
986 buf->f_type = UFS_MAGIC;
987 buf->f_bsize = sb->s_blocksize;
988 buf->f_blocks = uspi->s_dsize;
989 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
990 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
991 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
992 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
993 buf->f_files = uspi->s_ncg * uspi->s_ipg;
994 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
995 buf->f_namelen = UFS_MAXNAMLEN;
996
997 unlock_kernel();
998
999 return 0;
1000 }
1001
1002 static kmem_cache_t * ufs_inode_cachep;
1003
1004 static struct inode *ufs_alloc_inode(struct super_block *sb)
1005 {
1006 struct ufs_inode_info *ei;
1007 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1008 if (!ei)
1009 return NULL;
1010 ei->vfs_inode.i_version = 1;
1011 return &ei->vfs_inode;
1012 }
1013
1014 static void ufs_destroy_inode(struct inode *inode)
1015 {
1016 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1017 }
1018
1019 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1020 {
1021 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1022
1023 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1024 SLAB_CTOR_CONSTRUCTOR)
1025 inode_init_once(&ei->vfs_inode);
1026 }
1027
1028 static int init_inodecache(void)
1029 {
1030 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1031 sizeof(struct ufs_inode_info),
1032 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
1033 init_once, NULL);
1034 if (ufs_inode_cachep == NULL)
1035 return -ENOMEM;
1036 return 0;
1037 }
1038
1039 static void destroy_inodecache(void)
1040 {
1041 if (kmem_cache_destroy(ufs_inode_cachep))
1042 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1043 }
1044
1045 static struct super_operations ufs_super_ops = {
1046 .alloc_inode = ufs_alloc_inode,
1047 .destroy_inode = ufs_destroy_inode,
1048 .read_inode = ufs_read_inode,
1049 .write_inode = ufs_write_inode,
1050 .delete_inode = ufs_delete_inode,
1051 .put_super = ufs_put_super,
1052 .write_super = ufs_write_super,
1053 .statfs = ufs_statfs,
1054 .remount_fs = ufs_remount,
1055 };
1056
1057 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1058 int flags, const char *dev_name, void *data)
1059 {
1060 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1061 }
1062
1063 static struct file_system_type ufs_fs_type = {
1064 .owner = THIS_MODULE,
1065 .name = "ufs",
1066 .get_sb = ufs_get_sb,
1067 .kill_sb = kill_block_super,
1068 .fs_flags = FS_REQUIRES_DEV,
1069 };
1070
1071 static int __init init_ufs_fs(void)
1072 {
1073 int err = init_inodecache();
1074 if (err)
1075 goto out1;
1076 err = register_filesystem(&ufs_fs_type);
1077 if (err)
1078 goto out;
1079 return 0;
1080 out:
1081 destroy_inodecache();
1082 out1:
1083 return err;
1084 }
1085
1086 static void __exit exit_ufs_fs(void)
1087 {
1088 unregister_filesystem(&ufs_fs_type);
1089 destroy_inodecache();
1090 }
1091
1092 module_init(init_ufs_fs)
1093 module_exit(exit_ufs_fs)
1094 MODULE_LICENSE("GPL");
Historical 2.5/2.6 development