xref: /openbmc/linux/fs/ufs/super.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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_UBH);
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_UBH);
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 			if (!ubh)
427 				goto failed;
428 			ubh_ubhcpymem (space, ubh, size);
429 			sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
430 		}
431 		else {
432 			ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
433 			if (!ubh)
434 				goto failed;
435 			ubh_ubhcpymem(space, ubh, size);
436 			sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
437 		}
438 		space += size;
439 		ubh_brelse (ubh);
440 		ubh = NULL;
441 	}
442 
443 	/*
444 	 * Read cylinder group (we read only first fragment from block
445 	 * at this time) and prepare internal data structures for cg caching.
446 	 */
447 	if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
448 		goto failed;
449 	for (i = 0; i < uspi->s_ncg; i++)
450 		sbi->s_ucg[i] = NULL;
451 	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
452 		sbi->s_ucpi[i] = NULL;
453 		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
454 	}
455 	for (i = 0; i < uspi->s_ncg; i++) {
456 		UFSD(("read cg %u\n", i))
457 		if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
458 			goto failed;
459 		if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
460 			goto failed;
461 #ifdef UFS_SUPER_DEBUG_MORE
462 		ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
463 #endif
464 	}
465 	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
466 		if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
467 			goto failed;
468 		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
469 	}
470 	sbi->s_cg_loaded = 0;
471 	UFSD(("EXIT\n"))
472 	return 1;
473 
474 failed:
475 	if (base) kfree (base);
476 	if (sbi->s_ucg) {
477 		for (i = 0; i < uspi->s_ncg; i++)
478 			if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]);
479 		kfree (sbi->s_ucg);
480 		for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
481 			if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]);
482 	}
483 	UFSD(("EXIT (FAILED)\n"))
484 	return 0;
485 }
486 
487 /*
488  * Put on-disk structures associated with cylinder groups and
489  * write them back to disk
490  */
491 static void ufs_put_cylinder_structures (struct super_block *sb) {
492 	struct ufs_sb_info * sbi = UFS_SB(sb);
493 	struct ufs_sb_private_info * uspi;
494 	struct ufs_buffer_head * ubh;
495 	unsigned char * base, * space;
496 	unsigned blks, size, i;
497 
498 	UFSD(("ENTER\n"))
499 
500 	uspi = sbi->s_uspi;
501 
502 	size = uspi->s_cssize;
503 	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
504 	base = space = (char*) sbi->s_csp[0];
505 	for (i = 0; i < blks; i += uspi->s_fpb) {
506 		size = uspi->s_bsize;
507 		if (i + uspi->s_fpb > blks)
508 			size = (blks - i) * uspi->s_fsize;
509 		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
510 		ubh_memcpyubh (ubh, space, size);
511 		space += size;
512 		ubh_mark_buffer_uptodate (ubh, 1);
513 		ubh_mark_buffer_dirty (ubh);
514 		ubh_brelse (ubh);
515 	}
516 	for (i = 0; i < sbi->s_cg_loaded; i++) {
517 		ufs_put_cylinder (sb, i);
518 		kfree (sbi->s_ucpi[i]);
519 	}
520 	for (; i < UFS_MAX_GROUP_LOADED; i++)
521 		kfree (sbi->s_ucpi[i]);
522 	for (i = 0; i < uspi->s_ncg; i++)
523 		brelse (sbi->s_ucg[i]);
524 	kfree (sbi->s_ucg);
525 	kfree (base);
526 	UFSD(("EXIT\n"))
527 }
528 
529 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
530 {
531 	struct ufs_sb_info * sbi;
532 	struct ufs_sb_private_info * uspi;
533 	struct ufs_super_block_first * usb1;
534 	struct ufs_super_block_second * usb2;
535 	struct ufs_super_block_third * usb3;
536 	struct ufs_super_block *usb;
537 	struct ufs_buffer_head * ubh;
538 	struct inode *inode;
539 	unsigned block_size, super_block_size;
540 	unsigned flags;
541 
542 	uspi = NULL;
543 	ubh = NULL;
544 	flags = 0;
545 
546 	UFSD(("ENTER\n"))
547 
548 	sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
549 	if (!sbi)
550 		goto failed_nomem;
551 	sb->s_fs_info = sbi;
552 	memset(sbi, 0, sizeof(struct ufs_sb_info));
553 
554 	UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
555 
556 #ifndef CONFIG_UFS_FS_WRITE
557 	if (!(sb->s_flags & MS_RDONLY)) {
558 		printk("ufs was compiled with read-only support, "
559 		"can't be mounted as read-write\n");
560 		goto failed;
561 	}
562 #endif
563 	/*
564 	 * Set default mount options
565 	 * Parse mount options
566 	 */
567 	sbi->s_mount_opt = 0;
568 	ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
569 	if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
570 		printk("wrong mount options\n");
571 		goto failed;
572 	}
573 	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
574 		if (!silent)
575 			printk("You didn't specify the type of your ufs filesystem\n\n"
576 			"mount -t ufs -o ufstype="
577 			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
578 			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
579 			"default is ufstype=old\n");
580 		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
581 	}
582 
583 	sbi->s_uspi = uspi =
584 		kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
585 	if (!uspi)
586 		goto failed;
587 
588 	/* Keep 2Gig file limit. Some UFS variants need to override
589 	   this but as I don't know which I'll let those in the know loosen
590 	   the rules */
591 
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 		uspi->s_fsize = block_size = 512;
605 		uspi->s_fmask = ~(512 - 1);
606 		uspi->s_fshift = 9;
607 		uspi->s_sbsize = super_block_size = 1536;
608 		uspi->s_sbbase =  0;
609 		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
610 		if (!(sb->s_flags & MS_RDONLY)) {
611 			printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
612 			sb->s_flags |= MS_RDONLY;
613  		}
614 		break;
615 
616 	case UFS_MOUNT_UFSTYPE_SUN:
617 		UFSD(("ufstype=sun\n"))
618 		uspi->s_fsize = block_size = 1024;
619 		uspi->s_fmask = ~(1024 - 1);
620 		uspi->s_fshift = 10;
621 		uspi->s_sbsize = super_block_size = 2048;
622 		uspi->s_sbbase = 0;
623 		uspi->s_maxsymlinklen = 56;
624 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
625 		break;
626 
627 	case UFS_MOUNT_UFSTYPE_SUNx86:
628 		UFSD(("ufstype=sunx86\n"))
629 		uspi->s_fsize = block_size = 1024;
630 		uspi->s_fmask = ~(1024 - 1);
631 		uspi->s_fshift = 10;
632 		uspi->s_sbsize = super_block_size = 2048;
633 		uspi->s_sbbase = 0;
634 		uspi->s_maxsymlinklen = 56;
635 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
636 		break;
637 
638 	case UFS_MOUNT_UFSTYPE_OLD:
639 		UFSD(("ufstype=old\n"))
640 		uspi->s_fsize = block_size = 1024;
641 		uspi->s_fmask = ~(1024 - 1);
642 		uspi->s_fshift = 10;
643 		uspi->s_sbsize = super_block_size = 2048;
644 		uspi->s_sbbase = 0;
645 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
646 		if (!(sb->s_flags & MS_RDONLY)) {
647 			if (!silent)
648 				printk(KERN_INFO "ufstype=old is supported read-only\n");
649 			sb->s_flags |= MS_RDONLY;
650 		}
651 		break;
652 
653 	case UFS_MOUNT_UFSTYPE_NEXTSTEP:
654 		UFSD(("ufstype=nextstep\n"))
655 		uspi->s_fsize = block_size = 1024;
656 		uspi->s_fmask = ~(1024 - 1);
657 		uspi->s_fshift = 10;
658 		uspi->s_sbsize = super_block_size = 2048;
659 		uspi->s_sbbase = 0;
660 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
661 		if (!(sb->s_flags & MS_RDONLY)) {
662 			if (!silent)
663 				printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
664 			sb->s_flags |= MS_RDONLY;
665 		}
666 		break;
667 
668 	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
669 		UFSD(("ufstype=nextstep-cd\n"))
670 		uspi->s_fsize = block_size = 2048;
671 		uspi->s_fmask = ~(2048 - 1);
672 		uspi->s_fshift = 11;
673 		uspi->s_sbsize = super_block_size = 2048;
674 		uspi->s_sbbase = 0;
675 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
676 		if (!(sb->s_flags & MS_RDONLY)) {
677 			if (!silent)
678 				printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
679 			sb->s_flags |= MS_RDONLY;
680 		}
681 		break;
682 
683 	case UFS_MOUNT_UFSTYPE_OPENSTEP:
684 		UFSD(("ufstype=openstep\n"))
685 		uspi->s_fsize = block_size = 1024;
686 		uspi->s_fmask = ~(1024 - 1);
687 		uspi->s_fshift = 10;
688 		uspi->s_sbsize = super_block_size = 2048;
689 		uspi->s_sbbase = 0;
690 		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
691 		if (!(sb->s_flags & MS_RDONLY)) {
692 			if (!silent)
693 				printk(KERN_INFO "ufstype=openstep is supported read-only\n");
694 			sb->s_flags |= MS_RDONLY;
695 		}
696 		break;
697 
698 	case UFS_MOUNT_UFSTYPE_HP:
699 		UFSD(("ufstype=hp\n"))
700 		uspi->s_fsize = block_size = 1024;
701 		uspi->s_fmask = ~(1024 - 1);
702 		uspi->s_fshift = 10;
703 		uspi->s_sbsize = super_block_size = 2048;
704 		uspi->s_sbbase = 0;
705 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
706 		if (!(sb->s_flags & MS_RDONLY)) {
707 			if (!silent)
708 				printk(KERN_INFO "ufstype=hp is supported read-only\n");
709 			sb->s_flags |= MS_RDONLY;
710  		}
711  		break;
712 	default:
713 		if (!silent)
714 			printk("unknown ufstype\n");
715 		goto failed;
716 	}
717 
718 again:
719 	if (!sb_set_blocksize(sb, block_size)) {
720 		printk(KERN_ERR "UFS: failed to set blocksize\n");
721 		goto failed;
722 	}
723 
724 	/*
725 	 * read ufs super block from device
726 	 */
727 	if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
728 		ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size);
729 	}
730 	else {
731 		ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
732 	}
733 	if (!ubh)
734             goto failed;
735 
736 
737 	usb1 = ubh_get_usb_first(USPI_UBH);
738 	usb2 = ubh_get_usb_second(USPI_UBH);
739 	usb3 = ubh_get_usb_third(USPI_UBH);
740 	usb  = (struct ufs_super_block *)
741 		((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
742 
743 	/*
744 	 * Check ufs magic number
745 	 */
746 	sbi->s_bytesex = BYTESEX_LE;
747 	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
748 		case UFS_MAGIC:
749 		case UFS2_MAGIC:
750 		case UFS_MAGIC_LFN:
751 	        case UFS_MAGIC_FEA:
752 	        case UFS_MAGIC_4GB:
753 			goto magic_found;
754 	}
755 	sbi->s_bytesex = BYTESEX_BE;
756 	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
757 		case UFS_MAGIC:
758 		case UFS2_MAGIC:
759 		case UFS_MAGIC_LFN:
760 	        case UFS_MAGIC_FEA:
761 	        case UFS_MAGIC_4GB:
762 			goto magic_found;
763 	}
764 
765 	if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
766 	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
767 	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
768 	  && uspi->s_sbbase < 256) {
769 		ubh_brelse_uspi(uspi);
770 		ubh = NULL;
771 		uspi->s_sbbase += 8;
772 		goto again;
773 	}
774 	if (!silent)
775 		printk("ufs_read_super: bad magic number\n");
776 	goto failed;
777 
778 magic_found:
779 	/*
780 	 * Check block and fragment sizes
781 	 */
782 	uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
783 	uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
784 	uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
785 	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
786 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
787 
788 	if (uspi->s_fsize & (uspi->s_fsize - 1)) {
789 		printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
790 			uspi->s_fsize);
791 			goto failed;
792 	}
793 	if (uspi->s_fsize < 512) {
794 		printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
795 			uspi->s_fsize);
796 		goto failed;
797 	}
798 	if (uspi->s_fsize > 4096) {
799 		printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
800 			uspi->s_fsize);
801 		goto failed;
802 	}
803 	if (uspi->s_bsize & (uspi->s_bsize - 1)) {
804 		printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
805 			uspi->s_bsize);
806 		goto failed;
807 	}
808 	if (uspi->s_bsize < 4096) {
809 		printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
810 			uspi->s_bsize);
811 		goto failed;
812 	}
813 	if (uspi->s_bsize / uspi->s_fsize > 8) {
814 		printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
815 			uspi->s_bsize / uspi->s_fsize);
816 		goto failed;
817 	}
818 	if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
819 		ubh_brelse_uspi(uspi);
820 		ubh = NULL;
821 		block_size = uspi->s_fsize;
822 		super_block_size = uspi->s_sbsize;
823 		UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
824 		goto again;
825 	}
826 
827 #ifdef UFS_SUPER_DEBUG_MORE
828         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
829 		ufs2_print_super_stuff(sb,usb);
830         else
831 		ufs_print_super_stuff(sb, usb1, usb2, usb3);
832 #endif
833 
834 	/*
835 	 * Check, if file system was correctly unmounted.
836 	 * If not, make it read only.
837 	 */
838 	if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
839 	  ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
840 	  (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
841 	  (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
842 	  (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
843 		switch(usb1->fs_clean) {
844 		case UFS_FSCLEAN:
845 			UFSD(("fs is clean\n"))
846 			break;
847 		case UFS_FSSTABLE:
848 			UFSD(("fs is stable\n"))
849 			break;
850 		case UFS_FSOSF1:
851 			UFSD(("fs is DEC OSF/1\n"))
852 			break;
853 		case UFS_FSACTIVE:
854 			printk("ufs_read_super: fs is active\n");
855 			sb->s_flags |= MS_RDONLY;
856 			break;
857 		case UFS_FSBAD:
858 			printk("ufs_read_super: fs is bad\n");
859 			sb->s_flags |= MS_RDONLY;
860 			break;
861 		default:
862 			printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
863 			sb->s_flags |= MS_RDONLY;
864 			break;
865 		}
866 	}
867 	else {
868 		printk("ufs_read_super: fs needs fsck\n");
869 		sb->s_flags |= MS_RDONLY;
870 	}
871 
872 	/*
873 	 * Read ufs_super_block into internal data structures
874 	 */
875 	sb->s_op = &ufs_super_ops;
876 	sb->dq_op = NULL; /***/
877 	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
878 
879 	uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
880 	uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
881 	uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
882 	uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
883 	uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
884 	uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
885 
886 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
887 		uspi->s_u2_size  = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
888 		uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
889 	}
890 	else {
891 		uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
892 		uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
893 	}
894 
895 	uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
896 	/* s_bsize already set */
897 	/* s_fsize already set */
898 	uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
899 	uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
900 	uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
901 	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
902 	uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
903 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
904 	UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
905 		uspi->s_fshift));
906 	uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
907 	uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
908 	/* s_sbsize already set */
909 	uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
910 	uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
911 	uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
912 	uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
913 	uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
914 	uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
915 	uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
916 	uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
917 	uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
918 	uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
919 	uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
920 	uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
921 	uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
922 	uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
923 	uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
924 	uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
925 	uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
926 	uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
927 	uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
928 	uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
929 	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
930 	uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
931 	uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
932 	uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
933 
934 	/*
935 	 * Compute another frequently used values
936 	 */
937 	uspi->s_fpbmask = uspi->s_fpb - 1;
938 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
939 		uspi->s_apbshift = uspi->s_bshift - 3;
940 	}
941 	else {
942 		uspi->s_apbshift = uspi->s_bshift - 2;
943 	}
944 	uspi->s_2apbshift = uspi->s_apbshift * 2;
945 	uspi->s_3apbshift = uspi->s_apbshift * 3;
946 	uspi->s_apb = 1 << uspi->s_apbshift;
947 	uspi->s_2apb = 1 << uspi->s_2apbshift;
948 	uspi->s_3apb = 1 << uspi->s_3apbshift;
949 	uspi->s_apbmask = uspi->s_apb - 1;
950 	uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
951 	uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
952 	uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
953 	uspi->s_bpf = uspi->s_fsize << 3;
954 	uspi->s_bpfshift = uspi->s_fshift + 3;
955 	uspi->s_bpfmask = uspi->s_bpf - 1;
956 	if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
957 	    UFS_MOUNT_UFSTYPE_44BSD)
958 		uspi->s_maxsymlinklen =
959 		    fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
960 
961 	sbi->s_flags = flags;
962 
963 	inode = iget(sb, UFS_ROOTINO);
964 	if (!inode || is_bad_inode(inode))
965 		goto failed;
966 	sb->s_root = d_alloc_root(inode);
967 	if (!sb->s_root)
968 		goto dalloc_failed;
969 
970 
971 	/*
972 	 * Read cylinder group structures
973 	 */
974 	if (!(sb->s_flags & MS_RDONLY))
975 		if (!ufs_read_cylinder_structures(sb))
976 			goto failed;
977 
978 	UFSD(("EXIT\n"))
979 	return 0;
980 
981 dalloc_failed:
982 	iput(inode);
983 failed:
984 	if (ubh) ubh_brelse_uspi (uspi);
985 	if (uspi) kfree (uspi);
986 	if (sbi) kfree(sbi);
987 	sb->s_fs_info = NULL;
988 	UFSD(("EXIT (FAILED)\n"))
989 	return -EINVAL;
990 
991 failed_nomem:
992 	UFSD(("EXIT (NOMEM)\n"))
993 	return -ENOMEM;
994 }
995 
996 static void ufs_write_super (struct super_block *sb) {
997 	struct ufs_sb_private_info * uspi;
998 	struct ufs_super_block_first * usb1;
999 	struct ufs_super_block_third * usb3;
1000 	unsigned flags;
1001 
1002 	lock_kernel();
1003 
1004 	UFSD(("ENTER\n"))
1005 	flags = UFS_SB(sb)->s_flags;
1006 	uspi = UFS_SB(sb)->s_uspi;
1007 	usb1 = ubh_get_usb_first(USPI_UBH);
1008 	usb3 = ubh_get_usb_third(USPI_UBH);
1009 
1010 	if (!(sb->s_flags & MS_RDONLY)) {
1011 		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1012 		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1013 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1014 			ufs_set_fs_state(sb, usb1, usb3,
1015 					UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1016 		ubh_mark_buffer_dirty (USPI_UBH);
1017 	}
1018 	sb->s_dirt = 0;
1019 	UFSD(("EXIT\n"))
1020 	unlock_kernel();
1021 }
1022 
1023 static void ufs_put_super (struct super_block *sb)
1024 {
1025 	struct ufs_sb_info * sbi = UFS_SB(sb);
1026 
1027 	UFSD(("ENTER\n"))
1028 
1029 	if (!(sb->s_flags & MS_RDONLY))
1030 		ufs_put_cylinder_structures (sb);
1031 
1032 	ubh_brelse_uspi (sbi->s_uspi);
1033 	kfree (sbi->s_uspi);
1034 	kfree (sbi);
1035 	sb->s_fs_info = NULL;
1036 	return;
1037 }
1038 
1039 
1040 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1041 {
1042 	struct ufs_sb_private_info * uspi;
1043 	struct ufs_super_block_first * usb1;
1044 	struct ufs_super_block_third * usb3;
1045 	unsigned new_mount_opt, ufstype;
1046 	unsigned flags;
1047 
1048 	uspi = UFS_SB(sb)->s_uspi;
1049 	flags = UFS_SB(sb)->s_flags;
1050 	usb1 = ubh_get_usb_first(USPI_UBH);
1051 	usb3 = ubh_get_usb_third(USPI_UBH);
1052 
1053 	/*
1054 	 * Allow the "check" option to be passed as a remount option.
1055 	 * It is not possible to change ufstype option during remount
1056 	 */
1057 	ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1058 	new_mount_opt = 0;
1059 	ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1060 	if (!ufs_parse_options (data, &new_mount_opt))
1061 		return -EINVAL;
1062 	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1063 		new_mount_opt |= ufstype;
1064 	}
1065 	else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1066 		printk("ufstype can't be changed during remount\n");
1067 		return -EINVAL;
1068 	}
1069 
1070 	if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1071 		UFS_SB(sb)->s_mount_opt = new_mount_opt;
1072 		return 0;
1073 	}
1074 
1075 	/*
1076 	 * fs was mouted as rw, remounting ro
1077 	 */
1078 	if (*mount_flags & MS_RDONLY) {
1079 		ufs_put_cylinder_structures(sb);
1080 		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1081 		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1082 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1083 			ufs_set_fs_state(sb, usb1, usb3,
1084 				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1085 		ubh_mark_buffer_dirty (USPI_UBH);
1086 		sb->s_dirt = 0;
1087 		sb->s_flags |= MS_RDONLY;
1088 	}
1089 	/*
1090 	 * fs was mounted as ro, remounting rw
1091 	 */
1092 	else {
1093 #ifndef CONFIG_UFS_FS_WRITE
1094 		printk("ufs was compiled with read-only support, "
1095 		"can't be mounted as read-write\n");
1096 		return -EINVAL;
1097 #else
1098 		if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1099 		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1100 		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1101 			printk("this ufstype is read-only supported\n");
1102 			return -EINVAL;
1103 		}
1104 		if (!ufs_read_cylinder_structures (sb)) {
1105 			printk("failed during remounting\n");
1106 			return -EPERM;
1107 		}
1108 		sb->s_flags &= ~MS_RDONLY;
1109 #endif
1110 	}
1111 	UFS_SB(sb)->s_mount_opt = new_mount_opt;
1112 	return 0;
1113 }
1114 
1115 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1116 {
1117 	struct ufs_sb_private_info * uspi;
1118 	struct ufs_super_block_first * usb1;
1119 	struct ufs_super_block * usb;
1120 	unsigned  flags = 0;
1121 
1122 	lock_kernel();
1123 
1124 	uspi = UFS_SB(sb)->s_uspi;
1125 	usb1 = ubh_get_usb_first (USPI_UBH);
1126 	usb  = (struct ufs_super_block *)
1127 		((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1128 
1129 	flags = UFS_SB(sb)->s_flags;
1130 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1131 		buf->f_type = UFS2_MAGIC;
1132 		buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1133 		buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1134 			fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1135 		buf->f_ffree = fs64_to_cpu(sb,
1136         		usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1137 	}
1138 	else {
1139 		buf->f_type = UFS_MAGIC;
1140 		buf->f_blocks = uspi->s_dsize;
1141 		buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1142 			fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1143 		buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1144 	}
1145 	buf->f_bsize = sb->s_blocksize;
1146 	buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1147 		? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1148 	buf->f_files = uspi->s_ncg * uspi->s_ipg;
1149 	buf->f_namelen = UFS_MAXNAMLEN;
1150 
1151 	unlock_kernel();
1152 
1153 	return 0;
1154 }
1155 
1156 static kmem_cache_t * ufs_inode_cachep;
1157 
1158 static struct inode *ufs_alloc_inode(struct super_block *sb)
1159 {
1160 	struct ufs_inode_info *ei;
1161 	ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1162 	if (!ei)
1163 		return NULL;
1164 	ei->vfs_inode.i_version = 1;
1165 	return &ei->vfs_inode;
1166 }
1167 
1168 static void ufs_destroy_inode(struct inode *inode)
1169 {
1170 	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1171 }
1172 
1173 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1174 {
1175 	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1176 
1177 	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1178 	    SLAB_CTOR_CONSTRUCTOR)
1179 		inode_init_once(&ei->vfs_inode);
1180 }
1181 
1182 static int init_inodecache(void)
1183 {
1184 	ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1185 					     sizeof(struct ufs_inode_info),
1186 					     0, SLAB_RECLAIM_ACCOUNT,
1187 					     init_once, NULL);
1188 	if (ufs_inode_cachep == NULL)
1189 		return -ENOMEM;
1190 	return 0;
1191 }
1192 
1193 static void destroy_inodecache(void)
1194 {
1195 	if (kmem_cache_destroy(ufs_inode_cachep))
1196 		printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1197 }
1198 
1199 #ifdef CONFIG_QUOTA
1200 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1201 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1202 #endif
1203 
1204 static struct super_operations ufs_super_ops = {
1205 	.alloc_inode	= ufs_alloc_inode,
1206 	.destroy_inode	= ufs_destroy_inode,
1207 	.read_inode	= ufs_read_inode,
1208 	.write_inode	= ufs_write_inode,
1209 	.delete_inode	= ufs_delete_inode,
1210 	.put_super	= ufs_put_super,
1211 	.write_super	= ufs_write_super,
1212 	.statfs		= ufs_statfs,
1213 	.remount_fs	= ufs_remount,
1214 #ifdef CONFIG_QUOTA
1215 	.quota_read	= ufs_quota_read,
1216 	.quota_write	= ufs_quota_write,
1217 #endif
1218 };
1219 
1220 #ifdef CONFIG_QUOTA
1221 
1222 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1223  * acquiring the locks... As quota files are never truncated and quota code
1224  * itself serializes the operations (and noone else should touch the files)
1225  * we don't have to be afraid of races */
1226 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1227 			       size_t len, loff_t off)
1228 {
1229 	struct inode *inode = sb_dqopt(sb)->files[type];
1230 	sector_t blk = off >> sb->s_blocksize_bits;
1231 	int err = 0;
1232 	int offset = off & (sb->s_blocksize - 1);
1233 	int tocopy;
1234 	size_t toread;
1235 	struct buffer_head *bh;
1236 	loff_t i_size = i_size_read(inode);
1237 
1238 	if (off > i_size)
1239 		return 0;
1240 	if (off+len > i_size)
1241 		len = i_size-off;
1242 	toread = len;
1243 	while (toread > 0) {
1244 		tocopy = sb->s_blocksize - offset < toread ?
1245 				sb->s_blocksize - offset : toread;
1246 
1247 		bh = ufs_bread(inode, blk, 0, &err);
1248 		if (err)
1249 			return err;
1250 		if (!bh)	/* A hole? */
1251 			memset(data, 0, tocopy);
1252 		else {
1253 			memcpy(data, bh->b_data+offset, tocopy);
1254 			brelse(bh);
1255 		}
1256 		offset = 0;
1257 		toread -= tocopy;
1258 		data += tocopy;
1259 		blk++;
1260 	}
1261 	return len;
1262 }
1263 
1264 /* Write to quotafile */
1265 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1266 				const char *data, size_t len, loff_t off)
1267 {
1268 	struct inode *inode = sb_dqopt(sb)->files[type];
1269 	sector_t blk = off >> sb->s_blocksize_bits;
1270 	int err = 0;
1271 	int offset = off & (sb->s_blocksize - 1);
1272 	int tocopy;
1273 	size_t towrite = len;
1274 	struct buffer_head *bh;
1275 
1276 	down(&inode->i_sem);
1277 	while (towrite > 0) {
1278 		tocopy = sb->s_blocksize - offset < towrite ?
1279 				sb->s_blocksize - offset : towrite;
1280 
1281 		bh = ufs_bread(inode, blk, 1, &err);
1282 		if (!bh)
1283 			goto out;
1284 		lock_buffer(bh);
1285 		memcpy(bh->b_data+offset, data, tocopy);
1286 		flush_dcache_page(bh->b_page);
1287 		set_buffer_uptodate(bh);
1288 		mark_buffer_dirty(bh);
1289 		unlock_buffer(bh);
1290 		brelse(bh);
1291 		offset = 0;
1292 		towrite -= tocopy;
1293 		data += tocopy;
1294 		blk++;
1295 	}
1296 out:
1297 	if (len == towrite)
1298 		return err;
1299 	if (inode->i_size < off+len-towrite)
1300 		i_size_write(inode, off+len-towrite);
1301 	inode->i_version++;
1302 	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1303 	mark_inode_dirty(inode);
1304 	up(&inode->i_sem);
1305 	return len - towrite;
1306 }
1307 
1308 #endif
1309 
1310 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1311 	int flags, const char *dev_name, void *data)
1312 {
1313 	return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1314 }
1315 
1316 static struct file_system_type ufs_fs_type = {
1317 	.owner		= THIS_MODULE,
1318 	.name		= "ufs",
1319 	.get_sb		= ufs_get_sb,
1320 	.kill_sb	= kill_block_super,
1321 	.fs_flags	= FS_REQUIRES_DEV,
1322 };
1323 
1324 static int __init init_ufs_fs(void)
1325 {
1326 	int err = init_inodecache();
1327 	if (err)
1328 		goto out1;
1329 	err = register_filesystem(&ufs_fs_type);
1330 	if (err)
1331 		goto out;
1332 	return 0;
1333 out:
1334 	destroy_inodecache();
1335 out1:
1336 	return err;
1337 }
1338 
1339 static void __exit exit_ufs_fs(void)
1340 {
1341 	unregister_filesystem(&ufs_fs_type);
1342 	destroy_inodecache();
1343 }
1344 
1345 module_init(init_ufs_fs)
1346 module_exit(exit_ufs_fs)
1347 MODULE_LICENSE("GPL");
1348