xref: /openbmc/linux/fs/ufs/super.c (revision fd60b288)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  linux/fs/ufs/super.c
4  *
5  * Copyright (C) 1998
6  * Daniel Pirkl <daniel.pirkl@email.cz>
7  * Charles University, Faculty of Mathematics and Physics
8  */
9 
10 /* Derived from
11  *
12  *  linux/fs/ext2/super.c
13  *
14  * Copyright (C) 1992, 1993, 1994, 1995
15  * Remy Card (card@masi.ibp.fr)
16  * Laboratoire MASI - Institut Blaise Pascal
17  * Universite Pierre et Marie Curie (Paris VI)
18  *
19  *  from
20  *
21  *  linux/fs/minix/inode.c
22  *
23  *  Copyright (C) 1991, 1992  Linus Torvalds
24  *
25  *  Big-endian to little-endian byte-swapping/bitmaps by
26  *        David S. Miller (davem@caip.rutgers.edu), 1995
27  */
28 
29 /*
30  * Inspired by
31  *
32  *  linux/fs/ufs/super.c
33  *
34  * Copyright (C) 1996
35  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
36  * Laboratory for Computer Science Research Computing Facility
37  * Rutgers, The State University of New Jersey
38  *
39  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
40  *
41  * Kernel module support added on 96/04/26 by
42  * Stefan Reinauer <stepan@home.culture.mipt.ru>
43  *
44  * Module usage counts added on 96/04/29 by
45  * Gertjan van Wingerde <gwingerde@gmail.com>
46  *
47  * Clean swab support on 19970406 by
48  * Francois-Rene Rideau <fare@tunes.org>
49  *
50  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
51  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
52  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
53  *
54  * NeXTstep support added on February 5th 1998 by
55  * Niels Kristian Bech Jensen <nkbj@image.dk>.
56  *
57  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
58  *
59  * HP/UX hfs filesystem support added by
60  * Martin K. Petersen <mkp@mkp.net>, August 1999
61  *
62  * UFS2 (of FreeBSD 5.x) support added by
63  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
64  *
65  * UFS2 write support added by
66  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
67  */
68 
69 #include <linux/exportfs.h>
70 #include <linux/module.h>
71 #include <linux/bitops.h>
72 
73 #include <linux/stdarg.h>
74 
75 #include <linux/uaccess.h>
76 
77 #include <linux/errno.h>
78 #include <linux/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/backing-dev.h>
85 #include <linux/init.h>
86 #include <linux/parser.h>
87 #include <linux/buffer_head.h>
88 #include <linux/vfs.h>
89 #include <linux/log2.h>
90 #include <linux/mount.h>
91 #include <linux/seq_file.h>
92 #include <linux/iversion.h>
93 
94 #include "ufs_fs.h"
95 #include "ufs.h"
96 #include "swab.h"
97 #include "util.h"
98 
ufs_nfs_get_inode(struct super_block * sb,u64 ino,u32 generation)99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
100 {
101 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
102 	struct inode *inode;
103 
104 	if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
105 		return ERR_PTR(-ESTALE);
106 
107 	inode = ufs_iget(sb, ino);
108 	if (IS_ERR(inode))
109 		return ERR_CAST(inode);
110 	if (generation && inode->i_generation != generation) {
111 		iput(inode);
112 		return ERR_PTR(-ESTALE);
113 	}
114 	return inode;
115 }
116 
ufs_fh_to_dentry(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
118 				       int fh_len, int fh_type)
119 {
120 	return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
121 }
122 
ufs_fh_to_parent(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
124 				       int fh_len, int fh_type)
125 {
126 	return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
127 }
128 
ufs_get_parent(struct dentry * child)129 static struct dentry *ufs_get_parent(struct dentry *child)
130 {
131 	ino_t ino;
132 
133 	ino = ufs_inode_by_name(d_inode(child), &dotdot_name);
134 	if (!ino)
135 		return ERR_PTR(-ENOENT);
136 	return d_obtain_alias(ufs_iget(child->d_sb, ino));
137 }
138 
139 static const struct export_operations ufs_export_ops = {
140 	.fh_to_dentry	= ufs_fh_to_dentry,
141 	.fh_to_parent	= ufs_fh_to_parent,
142 	.get_parent	= ufs_get_parent,
143 };
144 
145 #ifdef CONFIG_UFS_DEBUG
146 /*
147  * Print contents of ufs_super_block, useful for debugging
148  */
ufs_print_super_stuff(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_second * usb2,struct ufs_super_block_third * usb3)149 static void ufs_print_super_stuff(struct super_block *sb,
150 				  struct ufs_super_block_first *usb1,
151 				  struct ufs_super_block_second *usb2,
152 				  struct ufs_super_block_third *usb3)
153 {
154 	u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
155 
156 	pr_debug("ufs_print_super_stuff\n");
157 	pr_debug("  magic:     0x%x\n", magic);
158 	if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
159 		pr_debug("  fs_size:   %llu\n", (unsigned long long)
160 			 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
161 		pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
162 			 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
163 		pr_debug("  bsize:         %u\n",
164 			 fs32_to_cpu(sb, usb1->fs_bsize));
165 		pr_debug("  fsize:         %u\n",
166 			 fs32_to_cpu(sb, usb1->fs_fsize));
167 		pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
168 		pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
169 			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
170 		pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
171 			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
172 		pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
173 			 (unsigned long long)
174 			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
175 		pr_info("  cs_nifree(Num of free inodes): %llu\n",
176 			(unsigned long long)
177 			fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
178 		pr_info("  cs_nffree(Num of free frags): %llu\n",
179 			(unsigned long long)
180 			fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
181 		pr_info("  fs_maxsymlinklen: %u\n",
182 			fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
183 	} else {
184 		pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
185 		pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
186 		pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
187 		pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
188 		pr_debug(" cgoffset:    %u\n",
189 			 fs32_to_cpu(sb, usb1->fs_cgoffset));
190 		pr_debug(" ~cgmask:     0x%x\n",
191 			 ~fs32_to_cpu(sb, usb1->fs_cgmask));
192 		pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
193 		pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
194 		pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
195 		pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
196 		pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
197 		pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
198 		pr_debug(" fragshift:   %u\n",
199 			 fs32_to_cpu(sb, usb1->fs_fragshift));
200 		pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
201 		pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
202 		pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
203 		pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
204 		pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
205 		pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
206 		pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
207 		pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
208 		pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
209 		pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
210 		pr_debug(" fstodb:      %u\n",
211 			 fs32_to_cpu(sb, usb1->fs_fsbtodb));
212 		pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
213 		pr_debug(" ndir         %u\n",
214 			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
215 		pr_debug(" nifree       %u\n",
216 			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
217 		pr_debug(" nbfree       %u\n",
218 			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
219 		pr_debug(" nffree       %u\n",
220 			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
221 	}
222 	pr_debug("\n");
223 }
224 
225 /*
226  * Print contents of ufs_cylinder_group, useful for debugging
227  */
ufs_print_cylinder_stuff(struct super_block * sb,struct ufs_cylinder_group * cg)228 static void ufs_print_cylinder_stuff(struct super_block *sb,
229 				     struct ufs_cylinder_group *cg)
230 {
231 	pr_debug("\nufs_print_cylinder_stuff\n");
232 	pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
233 	pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
234 	pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
235 	pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
236 	pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
237 	pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
238 	pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
239 	pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
240 	pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
241 	pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
242 	pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
243 	pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
244 	pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
245 	pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
246 	pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
247 	    fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
248 	    fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
249 	    fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
250 	    fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
251 	pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
252 	pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
253 	pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
254 	pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
255 	pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
256 	pr_debug("  clustersumoff %u\n",
257 		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
258 	pr_debug("  clusteroff    %u\n",
259 		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
260 	pr_debug("  nclusterblks  %u\n",
261 		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
262 	pr_debug("\n");
263 }
264 #else
265 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
266 #  define ufs_print_cylinder_stuff(sb, cg) /**/
267 #endif /* CONFIG_UFS_DEBUG */
268 
269 static const struct super_operations ufs_super_ops;
270 
ufs_error(struct super_block * sb,const char * function,const char * fmt,...)271 void ufs_error (struct super_block * sb, const char * function,
272 	const char * fmt, ...)
273 {
274 	struct ufs_sb_private_info * uspi;
275 	struct ufs_super_block_first * usb1;
276 	struct va_format vaf;
277 	va_list args;
278 
279 	uspi = UFS_SB(sb)->s_uspi;
280 	usb1 = ubh_get_usb_first(uspi);
281 
282 	if (!sb_rdonly(sb)) {
283 		usb1->fs_clean = UFS_FSBAD;
284 		ubh_mark_buffer_dirty(USPI_UBH(uspi));
285 		ufs_mark_sb_dirty(sb);
286 		sb->s_flags |= SB_RDONLY;
287 	}
288 	va_start(args, fmt);
289 	vaf.fmt = fmt;
290 	vaf.va = &args;
291 	switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
292 	case UFS_MOUNT_ONERROR_PANIC:
293 		panic("panic (device %s): %s: %pV\n",
294 		      sb->s_id, function, &vaf);
295 
296 	case UFS_MOUNT_ONERROR_LOCK:
297 	case UFS_MOUNT_ONERROR_UMOUNT:
298 	case UFS_MOUNT_ONERROR_REPAIR:
299 		pr_crit("error (device %s): %s: %pV\n",
300 			sb->s_id, function, &vaf);
301 	}
302 	va_end(args);
303 }
304 
ufs_panic(struct super_block * sb,const char * function,const char * fmt,...)305 void ufs_panic (struct super_block * sb, const char * function,
306 	const char * fmt, ...)
307 {
308 	struct ufs_sb_private_info * uspi;
309 	struct ufs_super_block_first * usb1;
310 	struct va_format vaf;
311 	va_list args;
312 
313 	uspi = UFS_SB(sb)->s_uspi;
314 	usb1 = ubh_get_usb_first(uspi);
315 
316 	if (!sb_rdonly(sb)) {
317 		usb1->fs_clean = UFS_FSBAD;
318 		ubh_mark_buffer_dirty(USPI_UBH(uspi));
319 		ufs_mark_sb_dirty(sb);
320 	}
321 	va_start(args, fmt);
322 	vaf.fmt = fmt;
323 	vaf.va = &args;
324 	sb->s_flags |= SB_RDONLY;
325 	pr_crit("panic (device %s): %s: %pV\n",
326 		sb->s_id, function, &vaf);
327 	va_end(args);
328 }
329 
ufs_warning(struct super_block * sb,const char * function,const char * fmt,...)330 void ufs_warning (struct super_block * sb, const char * function,
331 	const char * fmt, ...)
332 {
333 	struct va_format vaf;
334 	va_list args;
335 
336 	va_start(args, fmt);
337 	vaf.fmt = fmt;
338 	vaf.va = &args;
339 	pr_warn("(device %s): %s: %pV\n",
340 		sb->s_id, function, &vaf);
341 	va_end(args);
342 }
343 
344 enum {
345        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
346        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
347        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
348        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
349        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
350        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
351        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
352        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
353        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
354        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
355        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
356        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
357        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
358        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
359        Opt_err
360 };
361 
362 static const match_table_t tokens = {
363 	{Opt_type_old, "ufstype=old"},
364 	{Opt_type_sunx86, "ufstype=sunx86"},
365 	{Opt_type_sun, "ufstype=sun"},
366 	{Opt_type_sunos, "ufstype=sunos"},
367 	{Opt_type_44bsd, "ufstype=44bsd"},
368 	{Opt_type_ufs2, "ufstype=ufs2"},
369 	{Opt_type_ufs2, "ufstype=5xbsd"},
370 	{Opt_type_hp, "ufstype=hp"},
371 	{Opt_type_nextstepcd, "ufstype=nextstep-cd"},
372 	{Opt_type_nextstep, "ufstype=nextstep"},
373 	{Opt_type_openstep, "ufstype=openstep"},
374 /*end of possible ufs types */
375 	{Opt_onerror_panic, "onerror=panic"},
376 	{Opt_onerror_lock, "onerror=lock"},
377 	{Opt_onerror_umount, "onerror=umount"},
378 	{Opt_onerror_repair, "onerror=repair"},
379 	{Opt_err, NULL}
380 };
381 
ufs_parse_options(char * options,unsigned * mount_options)382 static int ufs_parse_options (char * options, unsigned * mount_options)
383 {
384 	char * p;
385 
386 	UFSD("ENTER\n");
387 
388 	if (!options)
389 		return 1;
390 
391 	while ((p = strsep(&options, ",")) != NULL) {
392 		substring_t args[MAX_OPT_ARGS];
393 		int token;
394 		if (!*p)
395 			continue;
396 
397 		token = match_token(p, tokens, args);
398 		switch (token) {
399 		case Opt_type_old:
400 			ufs_clear_opt (*mount_options, UFSTYPE);
401 			ufs_set_opt (*mount_options, UFSTYPE_OLD);
402 			break;
403 		case Opt_type_sunx86:
404 			ufs_clear_opt (*mount_options, UFSTYPE);
405 			ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
406 			break;
407 		case Opt_type_sun:
408 			ufs_clear_opt (*mount_options, UFSTYPE);
409 			ufs_set_opt (*mount_options, UFSTYPE_SUN);
410 			break;
411 		case Opt_type_sunos:
412 			ufs_clear_opt(*mount_options, UFSTYPE);
413 			ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
414 			break;
415 		case Opt_type_44bsd:
416 			ufs_clear_opt (*mount_options, UFSTYPE);
417 			ufs_set_opt (*mount_options, UFSTYPE_44BSD);
418 			break;
419 		case Opt_type_ufs2:
420 			ufs_clear_opt(*mount_options, UFSTYPE);
421 			ufs_set_opt(*mount_options, UFSTYPE_UFS2);
422 			break;
423 		case Opt_type_hp:
424 			ufs_clear_opt (*mount_options, UFSTYPE);
425 			ufs_set_opt (*mount_options, UFSTYPE_HP);
426 			break;
427 		case Opt_type_nextstepcd:
428 			ufs_clear_opt (*mount_options, UFSTYPE);
429 			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
430 			break;
431 		case Opt_type_nextstep:
432 			ufs_clear_opt (*mount_options, UFSTYPE);
433 			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
434 			break;
435 		case Opt_type_openstep:
436 			ufs_clear_opt (*mount_options, UFSTYPE);
437 			ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
438 			break;
439 		case Opt_onerror_panic:
440 			ufs_clear_opt (*mount_options, ONERROR);
441 			ufs_set_opt (*mount_options, ONERROR_PANIC);
442 			break;
443 		case Opt_onerror_lock:
444 			ufs_clear_opt (*mount_options, ONERROR);
445 			ufs_set_opt (*mount_options, ONERROR_LOCK);
446 			break;
447 		case Opt_onerror_umount:
448 			ufs_clear_opt (*mount_options, ONERROR);
449 			ufs_set_opt (*mount_options, ONERROR_UMOUNT);
450 			break;
451 		case Opt_onerror_repair:
452 			pr_err("Unable to do repair on error, will lock lock instead\n");
453 			ufs_clear_opt (*mount_options, ONERROR);
454 			ufs_set_opt (*mount_options, ONERROR_REPAIR);
455 			break;
456 		default:
457 			pr_err("Invalid option: \"%s\" or missing value\n", p);
458 			return 0;
459 		}
460 	}
461 	return 1;
462 }
463 
464 /*
465  * Different types of UFS hold fs_cstotal in different
466  * places, and use different data structure for it.
467  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
468  */
ufs_setup_cstotal(struct super_block * sb)469 static void ufs_setup_cstotal(struct super_block *sb)
470 {
471 	struct ufs_sb_info *sbi = UFS_SB(sb);
472 	struct ufs_sb_private_info *uspi = sbi->s_uspi;
473 	struct ufs_super_block_first *usb1;
474 	struct ufs_super_block_second *usb2;
475 	struct ufs_super_block_third *usb3;
476 	unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
477 
478 	UFSD("ENTER, mtype=%u\n", mtype);
479 	usb1 = ubh_get_usb_first(uspi);
480 	usb2 = ubh_get_usb_second(uspi);
481 	usb3 = ubh_get_usb_third(uspi);
482 
483 	if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
484 	     (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
485 	    mtype == UFS_MOUNT_UFSTYPE_UFS2) {
486 		/*we have statistic in different place, then usual*/
487 		uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
488 		uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
489 		uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
490 		uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
491 	} else {
492 		uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
493 		uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
494 		uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
495 		uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
496 	}
497 	UFSD("EXIT\n");
498 }
499 
500 /*
501  * Read on-disk structures associated with cylinder groups
502  */
ufs_read_cylinder_structures(struct super_block * sb)503 static int ufs_read_cylinder_structures(struct super_block *sb)
504 {
505 	struct ufs_sb_info *sbi = UFS_SB(sb);
506 	struct ufs_sb_private_info *uspi = sbi->s_uspi;
507 	struct ufs_buffer_head * ubh;
508 	unsigned char * base, * space;
509 	unsigned size, blks, i;
510 
511 	UFSD("ENTER\n");
512 
513 	/*
514 	 * Read cs structures from (usually) first data block
515 	 * on the device.
516 	 */
517 	size = uspi->s_cssize;
518 	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
519 	base = space = kmalloc(size, GFP_NOFS);
520 	if (!base)
521 		goto failed;
522 	sbi->s_csp = (struct ufs_csum *)space;
523 	for (i = 0; i < blks; i += uspi->s_fpb) {
524 		size = uspi->s_bsize;
525 		if (i + uspi->s_fpb > blks)
526 			size = (blks - i) * uspi->s_fsize;
527 
528 		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
529 
530 		if (!ubh)
531 			goto failed;
532 
533 		ubh_ubhcpymem (space, ubh, size);
534 
535 		space += size;
536 		ubh_brelse (ubh);
537 		ubh = NULL;
538 	}
539 
540 	/*
541 	 * Read cylinder group (we read only first fragment from block
542 	 * at this time) and prepare internal data structures for cg caching.
543 	 */
544 	sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
545 				   GFP_NOFS);
546 	if (!sbi->s_ucg)
547 		goto failed;
548 	for (i = 0; i < uspi->s_ncg; i++)
549 		sbi->s_ucg[i] = NULL;
550 	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
551 		sbi->s_ucpi[i] = NULL;
552 		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
553 	}
554 	for (i = 0; i < uspi->s_ncg; i++) {
555 		UFSD("read cg %u\n", i);
556 		if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
557 			goto failed;
558 		if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
559 			goto failed;
560 
561 		ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
562 	}
563 	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
564 		if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
565 			goto failed;
566 		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
567 	}
568 	sbi->s_cg_loaded = 0;
569 	UFSD("EXIT\n");
570 	return 1;
571 
572 failed:
573 	kfree (base);
574 	if (sbi->s_ucg) {
575 		for (i = 0; i < uspi->s_ncg; i++)
576 			if (sbi->s_ucg[i])
577 				brelse (sbi->s_ucg[i]);
578 		kfree (sbi->s_ucg);
579 		for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
580 			kfree (sbi->s_ucpi[i]);
581 	}
582 	UFSD("EXIT (FAILED)\n");
583 	return 0;
584 }
585 
586 /*
587  * Sync our internal copy of fs_cstotal with disk
588  */
ufs_put_cstotal(struct super_block * sb)589 static void ufs_put_cstotal(struct super_block *sb)
590 {
591 	unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
592 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
593 	struct ufs_super_block_first *usb1;
594 	struct ufs_super_block_second *usb2;
595 	struct ufs_super_block_third *usb3;
596 
597 	UFSD("ENTER\n");
598 	usb1 = ubh_get_usb_first(uspi);
599 	usb2 = ubh_get_usb_second(uspi);
600 	usb3 = ubh_get_usb_third(uspi);
601 
602 	if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
603 		/*we have statistic in different place, then usual*/
604 		usb2->fs_un.fs_u2.cs_ndir =
605 			cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
606 		usb2->fs_un.fs_u2.cs_nbfree =
607 			cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
608 		usb3->fs_un1.fs_u2.cs_nifree =
609 			cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
610 		usb3->fs_un1.fs_u2.cs_nffree =
611 			cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
612 		goto out;
613 	}
614 
615 	if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
616 	     (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
617 		/* store stats in both old and new places */
618 		usb2->fs_un.fs_u2.cs_ndir =
619 			cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
620 		usb2->fs_un.fs_u2.cs_nbfree =
621 			cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
622 		usb3->fs_un1.fs_u2.cs_nifree =
623 			cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
624 		usb3->fs_un1.fs_u2.cs_nffree =
625 			cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
626 	}
627 	usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
628 	usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
629 	usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
630 	usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
631 out:
632 	ubh_mark_buffer_dirty(USPI_UBH(uspi));
633 	ufs_print_super_stuff(sb, usb1, usb2, usb3);
634 	UFSD("EXIT\n");
635 }
636 
637 /**
638  * ufs_put_super_internal() - put on-disk intrenal structures
639  * @sb: pointer to super_block structure
640  * Put on-disk structures associated with cylinder groups
641  * and write them back to disk, also update cs_total on disk
642  */
ufs_put_super_internal(struct super_block * sb)643 static void ufs_put_super_internal(struct super_block *sb)
644 {
645 	struct ufs_sb_info *sbi = UFS_SB(sb);
646 	struct ufs_sb_private_info *uspi = sbi->s_uspi;
647 	struct ufs_buffer_head * ubh;
648 	unsigned char * base, * space;
649 	unsigned blks, size, i;
650 
651 
652 	UFSD("ENTER\n");
653 
654 	ufs_put_cstotal(sb);
655 	size = uspi->s_cssize;
656 	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
657 	base = space = (char*) sbi->s_csp;
658 	for (i = 0; i < blks; i += uspi->s_fpb) {
659 		size = uspi->s_bsize;
660 		if (i + uspi->s_fpb > blks)
661 			size = (blks - i) * uspi->s_fsize;
662 
663 		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
664 
665 		ubh_memcpyubh (ubh, space, size);
666 		space += size;
667 		ubh_mark_buffer_uptodate (ubh, 1);
668 		ubh_mark_buffer_dirty (ubh);
669 		ubh_brelse (ubh);
670 	}
671 	for (i = 0; i < sbi->s_cg_loaded; i++) {
672 		ufs_put_cylinder (sb, i);
673 		kfree (sbi->s_ucpi[i]);
674 	}
675 	for (; i < UFS_MAX_GROUP_LOADED; i++)
676 		kfree (sbi->s_ucpi[i]);
677 	for (i = 0; i < uspi->s_ncg; i++)
678 		brelse (sbi->s_ucg[i]);
679 	kfree (sbi->s_ucg);
680 	kfree (base);
681 
682 	UFSD("EXIT\n");
683 }
684 
ufs_sync_fs(struct super_block * sb,int wait)685 static int ufs_sync_fs(struct super_block *sb, int wait)
686 {
687 	struct ufs_sb_private_info * uspi;
688 	struct ufs_super_block_first * usb1;
689 	struct ufs_super_block_third * usb3;
690 	unsigned flags;
691 
692 	mutex_lock(&UFS_SB(sb)->s_lock);
693 
694 	UFSD("ENTER\n");
695 
696 	flags = UFS_SB(sb)->s_flags;
697 	uspi = UFS_SB(sb)->s_uspi;
698 	usb1 = ubh_get_usb_first(uspi);
699 	usb3 = ubh_get_usb_third(uspi);
700 
701 	usb1->fs_time = ufs_get_seconds(sb);
702 	if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
703 	    (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
704 	    (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
705 		ufs_set_fs_state(sb, usb1, usb3,
706 				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
707 	ufs_put_cstotal(sb);
708 
709 	UFSD("EXIT\n");
710 	mutex_unlock(&UFS_SB(sb)->s_lock);
711 
712 	return 0;
713 }
714 
delayed_sync_fs(struct work_struct * work)715 static void delayed_sync_fs(struct work_struct *work)
716 {
717 	struct ufs_sb_info *sbi;
718 
719 	sbi = container_of(work, struct ufs_sb_info, sync_work.work);
720 
721 	spin_lock(&sbi->work_lock);
722 	sbi->work_queued = 0;
723 	spin_unlock(&sbi->work_lock);
724 
725 	ufs_sync_fs(sbi->sb, 1);
726 }
727 
ufs_mark_sb_dirty(struct super_block * sb)728 void ufs_mark_sb_dirty(struct super_block *sb)
729 {
730 	struct ufs_sb_info *sbi = UFS_SB(sb);
731 	unsigned long delay;
732 
733 	spin_lock(&sbi->work_lock);
734 	if (!sbi->work_queued) {
735 		delay = msecs_to_jiffies(dirty_writeback_interval * 10);
736 		queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
737 		sbi->work_queued = 1;
738 	}
739 	spin_unlock(&sbi->work_lock);
740 }
741 
ufs_put_super(struct super_block * sb)742 static void ufs_put_super(struct super_block *sb)
743 {
744 	struct ufs_sb_info * sbi = UFS_SB(sb);
745 
746 	UFSD("ENTER\n");
747 
748 	if (!sb_rdonly(sb))
749 		ufs_put_super_internal(sb);
750 	cancel_delayed_work_sync(&sbi->sync_work);
751 
752 	ubh_brelse_uspi (sbi->s_uspi);
753 	kfree (sbi->s_uspi);
754 	kfree (sbi);
755 	sb->s_fs_info = NULL;
756 	UFSD("EXIT\n");
757 	return;
758 }
759 
ufs_max_bytes(struct super_block * sb)760 static u64 ufs_max_bytes(struct super_block *sb)
761 {
762 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
763 	int bits = uspi->s_apbshift;
764 	u64 res;
765 
766 	if (bits > 21)
767 		res = ~0ULL;
768 	else
769 		res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
770 			(1LL << (3*bits));
771 
772 	if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
773 		return MAX_LFS_FILESIZE;
774 	return res << uspi->s_bshift;
775 }
776 
ufs_fill_super(struct super_block * sb,void * data,int silent)777 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
778 {
779 	struct ufs_sb_info * sbi;
780 	struct ufs_sb_private_info * uspi;
781 	struct ufs_super_block_first * usb1;
782 	struct ufs_super_block_second * usb2;
783 	struct ufs_super_block_third * usb3;
784 	struct ufs_buffer_head * ubh;
785 	struct inode *inode;
786 	unsigned block_size, super_block_size;
787 	unsigned flags;
788 	unsigned super_block_offset;
789 	unsigned maxsymlen;
790 	int ret = -EINVAL;
791 
792 	uspi = NULL;
793 	ubh = NULL;
794 	flags = 0;
795 
796 	UFSD("ENTER\n");
797 
798 #ifndef CONFIG_UFS_FS_WRITE
799 	if (!sb_rdonly(sb)) {
800 		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
801 		return -EROFS;
802 	}
803 #endif
804 
805 	sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
806 	if (!sbi)
807 		goto failed_nomem;
808 	sb->s_fs_info = sbi;
809 	sbi->sb = sb;
810 
811 	UFSD("flag %u\n", (int)(sb_rdonly(sb)));
812 
813 	mutex_init(&sbi->s_lock);
814 	spin_lock_init(&sbi->work_lock);
815 	INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
816 	/*
817 	 * Set default mount options
818 	 * Parse mount options
819 	 */
820 	sbi->s_mount_opt = 0;
821 	ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
822 	if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
823 		pr_err("wrong mount options\n");
824 		goto failed;
825 	}
826 	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
827 		if (!silent)
828 			pr_err("You didn't specify the type of your ufs filesystem\n\n"
829 			"mount -t ufs -o ufstype="
830 			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
831 			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
832 			"default is ufstype=old\n");
833 		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
834 	}
835 
836 	uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
837 	sbi->s_uspi = uspi;
838 	if (!uspi)
839 		goto failed;
840 	uspi->s_dirblksize = UFS_SECTOR_SIZE;
841 	super_block_offset=UFS_SBLOCK;
842 
843 	sb->s_maxbytes = MAX_LFS_FILESIZE;
844 
845 	sb->s_time_gran = NSEC_PER_SEC;
846 	sb->s_time_min = S32_MIN;
847 	sb->s_time_max = S32_MAX;
848 
849 	switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
850 	case UFS_MOUNT_UFSTYPE_44BSD:
851 		UFSD("ufstype=44bsd\n");
852 		uspi->s_fsize = block_size = 512;
853 		uspi->s_fmask = ~(512 - 1);
854 		uspi->s_fshift = 9;
855 		uspi->s_sbsize = super_block_size = 1536;
856 		uspi->s_sbbase = 0;
857 		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
858 		break;
859 	case UFS_MOUNT_UFSTYPE_UFS2:
860 		UFSD("ufstype=ufs2\n");
861 		super_block_offset=SBLOCK_UFS2;
862 		uspi->s_fsize = block_size = 512;
863 		uspi->s_fmask = ~(512 - 1);
864 		uspi->s_fshift = 9;
865 		uspi->s_sbsize = super_block_size = 1536;
866 		uspi->s_sbbase =  0;
867 		sb->s_time_gran = 1;
868 		sb->s_time_min = S64_MIN;
869 		sb->s_time_max = S64_MAX;
870 		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
871 		break;
872 
873 	case UFS_MOUNT_UFSTYPE_SUN:
874 		UFSD("ufstype=sun\n");
875 		uspi->s_fsize = block_size = 1024;
876 		uspi->s_fmask = ~(1024 - 1);
877 		uspi->s_fshift = 10;
878 		uspi->s_sbsize = super_block_size = 2048;
879 		uspi->s_sbbase = 0;
880 		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
881 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
882 		break;
883 
884 	case UFS_MOUNT_UFSTYPE_SUNOS:
885 		UFSD("ufstype=sunos\n");
886 		uspi->s_fsize = block_size = 1024;
887 		uspi->s_fmask = ~(1024 - 1);
888 		uspi->s_fshift = 10;
889 		uspi->s_sbsize = 2048;
890 		super_block_size = 2048;
891 		uspi->s_sbbase = 0;
892 		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
893 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
894 		break;
895 
896 	case UFS_MOUNT_UFSTYPE_SUNx86:
897 		UFSD("ufstype=sunx86\n");
898 		uspi->s_fsize = block_size = 1024;
899 		uspi->s_fmask = ~(1024 - 1);
900 		uspi->s_fshift = 10;
901 		uspi->s_sbsize = super_block_size = 2048;
902 		uspi->s_sbbase = 0;
903 		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
904 		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
905 		break;
906 
907 	case UFS_MOUNT_UFSTYPE_OLD:
908 		UFSD("ufstype=old\n");
909 		uspi->s_fsize = block_size = 1024;
910 		uspi->s_fmask = ~(1024 - 1);
911 		uspi->s_fshift = 10;
912 		uspi->s_sbsize = super_block_size = 2048;
913 		uspi->s_sbbase = 0;
914 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
915 		if (!sb_rdonly(sb)) {
916 			if (!silent)
917 				pr_info("ufstype=old is supported read-only\n");
918 			sb->s_flags |= SB_RDONLY;
919 		}
920 		break;
921 
922 	case UFS_MOUNT_UFSTYPE_NEXTSTEP:
923 		UFSD("ufstype=nextstep\n");
924 		uspi->s_fsize = block_size = 1024;
925 		uspi->s_fmask = ~(1024 - 1);
926 		uspi->s_fshift = 10;
927 		uspi->s_sbsize = super_block_size = 2048;
928 		uspi->s_sbbase = 0;
929 		uspi->s_dirblksize = 1024;
930 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
931 		if (!sb_rdonly(sb)) {
932 			if (!silent)
933 				pr_info("ufstype=nextstep is supported read-only\n");
934 			sb->s_flags |= SB_RDONLY;
935 		}
936 		break;
937 
938 	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
939 		UFSD("ufstype=nextstep-cd\n");
940 		uspi->s_fsize = block_size = 2048;
941 		uspi->s_fmask = ~(2048 - 1);
942 		uspi->s_fshift = 11;
943 		uspi->s_sbsize = super_block_size = 2048;
944 		uspi->s_sbbase = 0;
945 		uspi->s_dirblksize = 1024;
946 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
947 		if (!sb_rdonly(sb)) {
948 			if (!silent)
949 				pr_info("ufstype=nextstep-cd is supported read-only\n");
950 			sb->s_flags |= SB_RDONLY;
951 		}
952 		break;
953 
954 	case UFS_MOUNT_UFSTYPE_OPENSTEP:
955 		UFSD("ufstype=openstep\n");
956 		uspi->s_fsize = block_size = 1024;
957 		uspi->s_fmask = ~(1024 - 1);
958 		uspi->s_fshift = 10;
959 		uspi->s_sbsize = super_block_size = 2048;
960 		uspi->s_sbbase = 0;
961 		uspi->s_dirblksize = 1024;
962 		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
963 		if (!sb_rdonly(sb)) {
964 			if (!silent)
965 				pr_info("ufstype=openstep is supported read-only\n");
966 			sb->s_flags |= SB_RDONLY;
967 		}
968 		break;
969 
970 	case UFS_MOUNT_UFSTYPE_HP:
971 		UFSD("ufstype=hp\n");
972 		uspi->s_fsize = block_size = 1024;
973 		uspi->s_fmask = ~(1024 - 1);
974 		uspi->s_fshift = 10;
975 		uspi->s_sbsize = super_block_size = 2048;
976 		uspi->s_sbbase = 0;
977 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
978 		if (!sb_rdonly(sb)) {
979 			if (!silent)
980 				pr_info("ufstype=hp is supported read-only\n");
981 			sb->s_flags |= SB_RDONLY;
982  		}
983  		break;
984 	default:
985 		if (!silent)
986 			pr_err("unknown ufstype\n");
987 		goto failed;
988 	}
989 
990 again:
991 	if (!sb_set_blocksize(sb, block_size)) {
992 		pr_err("failed to set blocksize\n");
993 		goto failed;
994 	}
995 
996 	/*
997 	 * read ufs super block from device
998 	 */
999 
1000 	ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
1001 
1002 	if (!ubh)
1003             goto failed;
1004 
1005 	usb1 = ubh_get_usb_first(uspi);
1006 	usb2 = ubh_get_usb_second(uspi);
1007 	usb3 = ubh_get_usb_third(uspi);
1008 
1009 	/* Sort out mod used on SunOS 4.1.3 for fs_state */
1010 	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1011 	if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1012 	    (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1013 		flags &= ~UFS_ST_MASK;
1014 		flags |=  UFS_ST_SUN;
1015 	}
1016 
1017 	if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1018 	    uspi->s_postblformat == UFS_42POSTBLFMT) {
1019 		if (!silent)
1020 			pr_err("this is not a 44bsd filesystem");
1021 		goto failed;
1022 	}
1023 
1024 	/*
1025 	 * Check ufs magic number
1026 	 */
1027 	sbi->s_bytesex = BYTESEX_LE;
1028 	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1029 		case UFS_MAGIC:
1030 		case UFS_MAGIC_BW:
1031 		case UFS2_MAGIC:
1032 		case UFS_MAGIC_LFN:
1033 	        case UFS_MAGIC_FEA:
1034 	        case UFS_MAGIC_4GB:
1035 			goto magic_found;
1036 	}
1037 	sbi->s_bytesex = BYTESEX_BE;
1038 	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1039 		case UFS_MAGIC:
1040 		case UFS_MAGIC_BW:
1041 		case UFS2_MAGIC:
1042 		case UFS_MAGIC_LFN:
1043 	        case UFS_MAGIC_FEA:
1044 	        case UFS_MAGIC_4GB:
1045 			goto magic_found;
1046 	}
1047 
1048 	if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
1049 	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
1050 	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
1051 	  && uspi->s_sbbase < 256) {
1052 		ubh_brelse_uspi(uspi);
1053 		ubh = NULL;
1054 		uspi->s_sbbase += 8;
1055 		goto again;
1056 	}
1057 	if (!silent)
1058 		pr_err("%s(): bad magic number\n", __func__);
1059 	goto failed;
1060 
1061 magic_found:
1062 	/*
1063 	 * Check block and fragment sizes
1064 	 */
1065 	uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1066 	uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1067 	uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1068 	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1069 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1070 
1071 	if (!is_power_of_2(uspi->s_fsize)) {
1072 		pr_err("%s(): fragment size %u is not a power of 2\n",
1073 		       __func__, uspi->s_fsize);
1074 		goto failed;
1075 	}
1076 	if (uspi->s_fsize < 512) {
1077 		pr_err("%s(): fragment size %u is too small\n",
1078 		       __func__, uspi->s_fsize);
1079 		goto failed;
1080 	}
1081 	if (uspi->s_fsize > 4096) {
1082 		pr_err("%s(): fragment size %u is too large\n",
1083 		       __func__, uspi->s_fsize);
1084 		goto failed;
1085 	}
1086 	if (!is_power_of_2(uspi->s_bsize)) {
1087 		pr_err("%s(): block size %u is not a power of 2\n",
1088 		       __func__, uspi->s_bsize);
1089 		goto failed;
1090 	}
1091 	if (uspi->s_bsize < 4096) {
1092 		pr_err("%s(): block size %u is too small\n",
1093 		       __func__, uspi->s_bsize);
1094 		goto failed;
1095 	}
1096 	if (uspi->s_bsize / uspi->s_fsize > 8) {
1097 		pr_err("%s(): too many fragments per block (%u)\n",
1098 		       __func__, uspi->s_bsize / uspi->s_fsize);
1099 		goto failed;
1100 	}
1101 	if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1102 		ubh_brelse_uspi(uspi);
1103 		ubh = NULL;
1104 		block_size = uspi->s_fsize;
1105 		super_block_size = uspi->s_sbsize;
1106 		UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1107 		goto again;
1108 	}
1109 
1110 	sbi->s_flags = flags;/*after that line some functions use s_flags*/
1111 	ufs_print_super_stuff(sb, usb1, usb2, usb3);
1112 
1113 	/*
1114 	 * Check, if file system was correctly unmounted.
1115 	 * If not, make it read only.
1116 	 */
1117 	if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1118 	  ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1119 	  (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1120 	    (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1121 	  (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1122 	  (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1123 		switch(usb1->fs_clean) {
1124 		case UFS_FSCLEAN:
1125 			UFSD("fs is clean\n");
1126 			break;
1127 		case UFS_FSSTABLE:
1128 			UFSD("fs is stable\n");
1129 			break;
1130 		case UFS_FSLOG:
1131 			UFSD("fs is logging fs\n");
1132 			break;
1133 		case UFS_FSOSF1:
1134 			UFSD("fs is DEC OSF/1\n");
1135 			break;
1136 		case UFS_FSACTIVE:
1137 			pr_err("%s(): fs is active\n", __func__);
1138 			sb->s_flags |= SB_RDONLY;
1139 			break;
1140 		case UFS_FSBAD:
1141 			pr_err("%s(): fs is bad\n", __func__);
1142 			sb->s_flags |= SB_RDONLY;
1143 			break;
1144 		default:
1145 			pr_err("%s(): can't grok fs_clean 0x%x\n",
1146 			       __func__, usb1->fs_clean);
1147 			sb->s_flags |= SB_RDONLY;
1148 			break;
1149 		}
1150 	} else {
1151 		pr_err("%s(): fs needs fsck\n", __func__);
1152 		sb->s_flags |= SB_RDONLY;
1153 	}
1154 
1155 	/*
1156 	 * Read ufs_super_block into internal data structures
1157 	 */
1158 	sb->s_op = &ufs_super_ops;
1159 	sb->s_export_op = &ufs_export_ops;
1160 
1161 	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1162 
1163 	uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1164 	uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1165 	uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1166 	uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1167 	uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1168 	uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1169 
1170 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1171 		uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1172 		uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1173 	} else {
1174 		uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1175 		uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1176 	}
1177 
1178 	uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1179 	/* s_bsize already set */
1180 	/* s_fsize already set */
1181 	uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1182 	uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1183 	uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1184 	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1185 	uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1186 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1187 	UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1188 		uspi->s_fshift);
1189 	uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1190 	uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1191 	/* s_sbsize already set */
1192 	uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1193 	uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1194 	uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1195 	uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1196 	uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1197 	uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1198 	uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1199 	uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1200 
1201 	if (uspi->fs_magic == UFS2_MAGIC)
1202 		uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1203 	else
1204 		uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1205 
1206 	uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1207 	uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1208 	uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1209 	uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1210 	uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1211 	uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1212 	uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1213 	uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1214 	uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1215 	uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1216 	uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1217 	uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1218 	uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1219 	uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1220 
1221 	uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1222 					      uspi->s_minfree, 100);
1223 	if (uspi->s_minfree <= 5) {
1224 		uspi->s_time_to_space = ~0ULL;
1225 		uspi->s_space_to_time = 0;
1226 		usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1227 	} else {
1228 		uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1229 		uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1230 					      uspi->s_minfree - 2, 100) - 1;
1231 	}
1232 
1233 	/*
1234 	 * Compute another frequently used values
1235 	 */
1236 	uspi->s_fpbmask = uspi->s_fpb - 1;
1237 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1238 		uspi->s_apbshift = uspi->s_bshift - 3;
1239 	else
1240 		uspi->s_apbshift = uspi->s_bshift - 2;
1241 
1242 	uspi->s_2apbshift = uspi->s_apbshift * 2;
1243 	uspi->s_3apbshift = uspi->s_apbshift * 3;
1244 	uspi->s_apb = 1 << uspi->s_apbshift;
1245 	uspi->s_2apb = 1 << uspi->s_2apbshift;
1246 	uspi->s_3apb = 1 << uspi->s_3apbshift;
1247 	uspi->s_apbmask = uspi->s_apb - 1;
1248 	uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1249 	uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1250 	uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1251 	uspi->s_bpf = uspi->s_fsize << 3;
1252 	uspi->s_bpfshift = uspi->s_fshift + 3;
1253 	uspi->s_bpfmask = uspi->s_bpf - 1;
1254 	if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1255 	    (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1256 		uspi->s_maxsymlinklen =
1257 		    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1258 
1259 	if (uspi->fs_magic == UFS2_MAGIC)
1260 		maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1261 	else
1262 		maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1263 	if (uspi->s_maxsymlinklen > maxsymlen) {
1264 		ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1265 			    "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1266 		uspi->s_maxsymlinklen = maxsymlen;
1267 	}
1268 	sb->s_maxbytes = ufs_max_bytes(sb);
1269 	sb->s_max_links = UFS_LINK_MAX;
1270 
1271 	inode = ufs_iget(sb, UFS_ROOTINO);
1272 	if (IS_ERR(inode)) {
1273 		ret = PTR_ERR(inode);
1274 		goto failed;
1275 	}
1276 	sb->s_root = d_make_root(inode);
1277 	if (!sb->s_root) {
1278 		ret = -ENOMEM;
1279 		goto failed;
1280 	}
1281 
1282 	ufs_setup_cstotal(sb);
1283 	/*
1284 	 * Read cylinder group structures
1285 	 */
1286 	if (!sb_rdonly(sb))
1287 		if (!ufs_read_cylinder_structures(sb))
1288 			goto failed;
1289 
1290 	UFSD("EXIT\n");
1291 	return 0;
1292 
1293 failed:
1294 	if (ubh)
1295 		ubh_brelse_uspi (uspi);
1296 	kfree (uspi);
1297 	kfree(sbi);
1298 	sb->s_fs_info = NULL;
1299 	UFSD("EXIT (FAILED)\n");
1300 	return ret;
1301 
1302 failed_nomem:
1303 	UFSD("EXIT (NOMEM)\n");
1304 	return -ENOMEM;
1305 }
1306 
ufs_remount(struct super_block * sb,int * mount_flags,char * data)1307 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1308 {
1309 	struct ufs_sb_private_info * uspi;
1310 	struct ufs_super_block_first * usb1;
1311 	struct ufs_super_block_third * usb3;
1312 	unsigned new_mount_opt, ufstype;
1313 	unsigned flags;
1314 
1315 	sync_filesystem(sb);
1316 	mutex_lock(&UFS_SB(sb)->s_lock);
1317 	uspi = UFS_SB(sb)->s_uspi;
1318 	flags = UFS_SB(sb)->s_flags;
1319 	usb1 = ubh_get_usb_first(uspi);
1320 	usb3 = ubh_get_usb_third(uspi);
1321 
1322 	/*
1323 	 * Allow the "check" option to be passed as a remount option.
1324 	 * It is not possible to change ufstype option during remount
1325 	 */
1326 	ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1327 	new_mount_opt = 0;
1328 	ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1329 	if (!ufs_parse_options (data, &new_mount_opt)) {
1330 		mutex_unlock(&UFS_SB(sb)->s_lock);
1331 		return -EINVAL;
1332 	}
1333 	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1334 		new_mount_opt |= ufstype;
1335 	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1336 		pr_err("ufstype can't be changed during remount\n");
1337 		mutex_unlock(&UFS_SB(sb)->s_lock);
1338 		return -EINVAL;
1339 	}
1340 
1341 	if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1342 		UFS_SB(sb)->s_mount_opt = new_mount_opt;
1343 		mutex_unlock(&UFS_SB(sb)->s_lock);
1344 		return 0;
1345 	}
1346 
1347 	/*
1348 	 * fs was mouted as rw, remounting ro
1349 	 */
1350 	if (*mount_flags & SB_RDONLY) {
1351 		ufs_put_super_internal(sb);
1352 		usb1->fs_time = ufs_get_seconds(sb);
1353 		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1354 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1355 		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1356 			ufs_set_fs_state(sb, usb1, usb3,
1357 				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1358 		ubh_mark_buffer_dirty (USPI_UBH(uspi));
1359 		sb->s_flags |= SB_RDONLY;
1360 	} else {
1361 	/*
1362 	 * fs was mounted as ro, remounting rw
1363 	 */
1364 #ifndef CONFIG_UFS_FS_WRITE
1365 		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1366 		mutex_unlock(&UFS_SB(sb)->s_lock);
1367 		return -EINVAL;
1368 #else
1369 		if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1370 		    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1371 		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1372 		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1373 		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1374 			pr_err("this ufstype is read-only supported\n");
1375 			mutex_unlock(&UFS_SB(sb)->s_lock);
1376 			return -EINVAL;
1377 		}
1378 		if (!ufs_read_cylinder_structures(sb)) {
1379 			pr_err("failed during remounting\n");
1380 			mutex_unlock(&UFS_SB(sb)->s_lock);
1381 			return -EPERM;
1382 		}
1383 		sb->s_flags &= ~SB_RDONLY;
1384 #endif
1385 	}
1386 	UFS_SB(sb)->s_mount_opt = new_mount_opt;
1387 	mutex_unlock(&UFS_SB(sb)->s_lock);
1388 	return 0;
1389 }
1390 
ufs_show_options(struct seq_file * seq,struct dentry * root)1391 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1392 {
1393 	struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1394 	unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1395 	const struct match_token *tp = tokens;
1396 
1397 	while (tp->token != Opt_onerror_panic && tp->token != mval)
1398 		++tp;
1399 	BUG_ON(tp->token == Opt_onerror_panic);
1400 	seq_printf(seq, ",%s", tp->pattern);
1401 
1402 	mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1403 	while (tp->token != Opt_err && tp->token != mval)
1404 		++tp;
1405 	BUG_ON(tp->token == Opt_err);
1406 	seq_printf(seq, ",%s", tp->pattern);
1407 
1408 	return 0;
1409 }
1410 
ufs_statfs(struct dentry * dentry,struct kstatfs * buf)1411 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1412 {
1413 	struct super_block *sb = dentry->d_sb;
1414 	struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1415 	unsigned  flags = UFS_SB(sb)->s_flags;
1416 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1417 
1418 	mutex_lock(&UFS_SB(sb)->s_lock);
1419 
1420 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1421 		buf->f_type = UFS2_MAGIC;
1422 	else
1423 		buf->f_type = UFS_MAGIC;
1424 
1425 	buf->f_blocks = uspi->s_dsize;
1426 	buf->f_bfree = ufs_freefrags(uspi);
1427 	buf->f_ffree = uspi->cs_total.cs_nifree;
1428 	buf->f_bsize = sb->s_blocksize;
1429 	buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1430 		? (buf->f_bfree - uspi->s_root_blocks) : 0;
1431 	buf->f_files = uspi->s_ncg * uspi->s_ipg;
1432 	buf->f_namelen = UFS_MAXNAMLEN;
1433 	buf->f_fsid = u64_to_fsid(id);
1434 
1435 	mutex_unlock(&UFS_SB(sb)->s_lock);
1436 
1437 	return 0;
1438 }
1439 
1440 static struct kmem_cache * ufs_inode_cachep;
1441 
ufs_alloc_inode(struct super_block * sb)1442 static struct inode *ufs_alloc_inode(struct super_block *sb)
1443 {
1444 	struct ufs_inode_info *ei;
1445 
1446 	ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS);
1447 	if (!ei)
1448 		return NULL;
1449 
1450 	inode_set_iversion(&ei->vfs_inode, 1);
1451 	seqlock_init(&ei->meta_lock);
1452 	mutex_init(&ei->truncate_mutex);
1453 	return &ei->vfs_inode;
1454 }
1455 
ufs_free_in_core_inode(struct inode * inode)1456 static void ufs_free_in_core_inode(struct inode *inode)
1457 {
1458 	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1459 }
1460 
init_once(void * foo)1461 static void init_once(void *foo)
1462 {
1463 	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1464 
1465 	inode_init_once(&ei->vfs_inode);
1466 }
1467 
init_inodecache(void)1468 static int __init init_inodecache(void)
1469 {
1470 	ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1471 				sizeof(struct ufs_inode_info), 0,
1472 				(SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1473 					SLAB_ACCOUNT),
1474 				offsetof(struct ufs_inode_info, i_u1.i_symlink),
1475 				sizeof_field(struct ufs_inode_info,
1476 					i_u1.i_symlink),
1477 				init_once);
1478 	if (ufs_inode_cachep == NULL)
1479 		return -ENOMEM;
1480 	return 0;
1481 }
1482 
destroy_inodecache(void)1483 static void destroy_inodecache(void)
1484 {
1485 	/*
1486 	 * Make sure all delayed rcu free inodes are flushed before we
1487 	 * destroy cache.
1488 	 */
1489 	rcu_barrier();
1490 	kmem_cache_destroy(ufs_inode_cachep);
1491 }
1492 
1493 static const struct super_operations ufs_super_ops = {
1494 	.alloc_inode	= ufs_alloc_inode,
1495 	.free_inode	= ufs_free_in_core_inode,
1496 	.write_inode	= ufs_write_inode,
1497 	.evict_inode	= ufs_evict_inode,
1498 	.put_super	= ufs_put_super,
1499 	.sync_fs	= ufs_sync_fs,
1500 	.statfs		= ufs_statfs,
1501 	.remount_fs	= ufs_remount,
1502 	.show_options   = ufs_show_options,
1503 };
1504 
ufs_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1505 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1506 	int flags, const char *dev_name, void *data)
1507 {
1508 	return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1509 }
1510 
1511 static struct file_system_type ufs_fs_type = {
1512 	.owner		= THIS_MODULE,
1513 	.name		= "ufs",
1514 	.mount		= ufs_mount,
1515 	.kill_sb	= kill_block_super,
1516 	.fs_flags	= FS_REQUIRES_DEV,
1517 };
1518 MODULE_ALIAS_FS("ufs");
1519 
init_ufs_fs(void)1520 static int __init init_ufs_fs(void)
1521 {
1522 	int err = init_inodecache();
1523 	if (err)
1524 		goto out1;
1525 	err = register_filesystem(&ufs_fs_type);
1526 	if (err)
1527 		goto out;
1528 	return 0;
1529 out:
1530 	destroy_inodecache();
1531 out1:
1532 	return err;
1533 }
1534 
exit_ufs_fs(void)1535 static void __exit exit_ufs_fs(void)
1536 {
1537 	unregister_filesystem(&ufs_fs_type);
1538 	destroy_inodecache();
1539 }
1540 
1541 module_init(init_ufs_fs)
1542 module_exit(exit_ufs_fs)
1543 MODULE_LICENSE("GPL");
1544