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1da177e4 LT |
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 | * | |
cbcae39f ED |
64 | * UFS2 write support added by |
65 | * Evgeniy Dushistov <dushistov@mail.ru>, 2007 | |
1da177e4 LT |
66 | */ |
67 | ||
68 | ||
1da177e4 LT |
69 | #include <linux/module.h> |
70 | #include <linux/bitops.h> | |
71 | ||
72 | #include <stdarg.h> | |
73 | ||
74 | #include <asm/uaccess.h> | |
75 | #include <asm/system.h> | |
76 | ||
77 | #include <linux/errno.h> | |
78 | #include <linux/fs.h> | |
79 | #include <linux/ufs_fs.h> | |
80 | #include <linux/slab.h> | |
81 | #include <linux/time.h> | |
82 | #include <linux/stat.h> | |
83 | #include <linux/string.h> | |
84 | #include <linux/blkdev.h> | |
85 | #include <linux/init.h> | |
86 | #include <linux/parser.h> | |
87 | #include <linux/smp_lock.h> | |
88 | #include <linux/buffer_head.h> | |
89 | #include <linux/vfs.h> | |
9e8c4273 | 90 | #include <linux/log2.h> |
1da177e4 LT |
91 | |
92 | #include "swab.h" | |
93 | #include "util.h" | |
94 | ||
abf5d15f | 95 | #ifdef CONFIG_UFS_DEBUG |
1da177e4 LT |
96 | /* |
97 | * Print contents of ufs_super_block, useful for debugging | |
98 | */ | |
3313e292 | 99 | static void ufs_print_super_stuff(struct super_block *sb, |
647b7e87 ED |
100 | struct ufs_super_block_first *usb1, |
101 | struct ufs_super_block_second *usb2, | |
102 | struct ufs_super_block_third *usb3) | |
1da177e4 | 103 | { |
3313e292 ED |
104 | u32 magic = fs32_to_cpu(sb, usb3->fs_magic); |
105 | ||
1da177e4 | 106 | printk("ufs_print_super_stuff\n"); |
3313e292 ED |
107 | printk(" magic: 0x%x\n", magic); |
108 | if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { | |
647b7e87 ED |
109 | printk(" fs_size: %llu\n", (unsigned long long) |
110 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); | |
111 | printk(" fs_dsize: %llu\n", (unsigned long long) | |
112 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); | |
113 | printk(" bsize: %u\n", | |
114 | fs32_to_cpu(sb, usb1->fs_bsize)); | |
115 | printk(" fsize: %u\n", | |
116 | fs32_to_cpu(sb, usb1->fs_fsize)); | |
117 | printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); | |
118 | printk(" fs_sblockloc: %llu\n", (unsigned long long) | |
119 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); | |
120 | printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) | |
121 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); | |
122 | printk(" cs_nbfree(No of free blocks): %llu\n", | |
123 | (unsigned long long) | |
124 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); | |
3313e292 ED |
125 | printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", |
126 | (unsigned long long) | |
127 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); | |
128 | printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", | |
129 | (unsigned long long) | |
130 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); | |
647b7e87 ED |
131 | } else { |
132 | printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); | |
133 | printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); | |
134 | printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); | |
135 | printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); | |
136 | printk(" cgoffset: %u\n", | |
137 | fs32_to_cpu(sb, usb1->fs_cgoffset)); | |
138 | printk(" ~cgmask: 0x%x\n", | |
139 | ~fs32_to_cpu(sb, usb1->fs_cgmask)); | |
140 | printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); | |
141 | printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); | |
142 | printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); | |
143 | printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); | |
144 | printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); | |
145 | printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); | |
146 | printk(" fragshift: %u\n", | |
147 | fs32_to_cpu(sb, usb1->fs_fragshift)); | |
148 | printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); | |
149 | printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); | |
150 | printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); | |
151 | printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); | |
152 | printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); | |
153 | printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); | |
154 | printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); | |
155 | printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); | |
156 | printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); | |
157 | printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); | |
158 | printk(" fstodb: %u\n", | |
159 | fs32_to_cpu(sb, usb1->fs_fsbtodb)); | |
160 | printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); | |
161 | printk(" ndir %u\n", | |
162 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); | |
163 | printk(" nifree %u\n", | |
164 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); | |
165 | printk(" nbfree %u\n", | |
166 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); | |
167 | printk(" nffree %u\n", | |
168 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); | |
169 | } | |
1da177e4 LT |
170 | printk("\n"); |
171 | } | |
172 | ||
173 | /* | |
174 | * Print contents of ufs_cylinder_group, useful for debugging | |
175 | */ | |
647b7e87 ED |
176 | static void ufs_print_cylinder_stuff(struct super_block *sb, |
177 | struct ufs_cylinder_group *cg) | |
1da177e4 LT |
178 | { |
179 | printk("\nufs_print_cylinder_stuff\n"); | |
96710b29 | 180 | printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); |
1da177e4 LT |
181 | printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); |
182 | printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); | |
183 | printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); | |
184 | printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); | |
185 | printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); | |
186 | printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); | |
187 | printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); | |
188 | printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); | |
189 | printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); | |
190 | printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); | |
191 | printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); | |
192 | printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); | |
193 | printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); | |
194 | printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", | |
195 | fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), | |
196 | fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), | |
197 | fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), | |
198 | fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); | |
199 | printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); | |
200 | printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); | |
201 | printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); | |
202 | printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); | |
203 | printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); | |
647b7e87 ED |
204 | printk(" clustersumoff %u\n", |
205 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); | |
206 | printk(" clusteroff %u\n", | |
207 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); | |
208 | printk(" nclusterblks %u\n", | |
209 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); | |
1da177e4 LT |
210 | printk("\n"); |
211 | } | |
647b7e87 | 212 | #else |
3313e292 | 213 | # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ |
647b7e87 | 214 | # define ufs_print_cylinder_stuff(sb, cg) /**/ |
abf5d15f | 215 | #endif /* CONFIG_UFS_DEBUG */ |
1da177e4 | 216 | |
ee9b6d61 | 217 | static const struct super_operations ufs_super_ops; |
1da177e4 LT |
218 | |
219 | static char error_buf[1024]; | |
220 | ||
221 | void ufs_error (struct super_block * sb, const char * function, | |
222 | const char * fmt, ...) | |
223 | { | |
224 | struct ufs_sb_private_info * uspi; | |
225 | struct ufs_super_block_first * usb1; | |
226 | va_list args; | |
227 | ||
228 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 229 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
230 | |
231 | if (!(sb->s_flags & MS_RDONLY)) { | |
232 | usb1->fs_clean = UFS_FSBAD; | |
9695ef16 | 233 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
1da177e4 LT |
234 | sb->s_dirt = 1; |
235 | sb->s_flags |= MS_RDONLY; | |
236 | } | |
237 | va_start (args, fmt); | |
4a6e617a | 238 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
239 | va_end (args); |
240 | switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { | |
241 | case UFS_MOUNT_ONERROR_PANIC: | |
242 | panic ("UFS-fs panic (device %s): %s: %s\n", | |
243 | sb->s_id, function, error_buf); | |
244 | ||
245 | case UFS_MOUNT_ONERROR_LOCK: | |
246 | case UFS_MOUNT_ONERROR_UMOUNT: | |
247 | case UFS_MOUNT_ONERROR_REPAIR: | |
248 | printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", | |
249 | sb->s_id, function, error_buf); | |
250 | } | |
251 | } | |
252 | ||
253 | void ufs_panic (struct super_block * sb, const char * function, | |
254 | const char * fmt, ...) | |
255 | { | |
256 | struct ufs_sb_private_info * uspi; | |
257 | struct ufs_super_block_first * usb1; | |
258 | va_list args; | |
259 | ||
260 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 261 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
262 | |
263 | if (!(sb->s_flags & MS_RDONLY)) { | |
264 | usb1->fs_clean = UFS_FSBAD; | |
9695ef16 | 265 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
1da177e4 LT |
266 | sb->s_dirt = 1; |
267 | } | |
268 | va_start (args, fmt); | |
4a6e617a | 269 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
270 | va_end (args); |
271 | sb->s_flags |= MS_RDONLY; | |
272 | printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", | |
273 | sb->s_id, function, error_buf); | |
274 | } | |
275 | ||
276 | void ufs_warning (struct super_block * sb, const char * function, | |
277 | const char * fmt, ...) | |
278 | { | |
279 | va_list args; | |
280 | ||
281 | va_start (args, fmt); | |
4a6e617a | 282 | vsnprintf (error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
283 | va_end (args); |
284 | printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", | |
285 | sb->s_id, function, error_buf); | |
286 | } | |
287 | ||
288 | enum { | |
289 | Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, | |
290 | Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, | |
291 | Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, | |
292 | Opt_onerror_umount, Opt_onerror_repair, Opt_err | |
293 | }; | |
294 | ||
295 | static match_table_t tokens = { | |
296 | {Opt_type_old, "ufstype=old"}, | |
297 | {Opt_type_sunx86, "ufstype=sunx86"}, | |
298 | {Opt_type_sun, "ufstype=sun"}, | |
299 | {Opt_type_44bsd, "ufstype=44bsd"}, | |
300 | {Opt_type_ufs2, "ufstype=ufs2"}, | |
301 | {Opt_type_ufs2, "ufstype=5xbsd"}, | |
302 | {Opt_type_hp, "ufstype=hp"}, | |
303 | {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, | |
304 | {Opt_type_nextstep, "ufstype=nextstep"}, | |
305 | {Opt_type_openstep, "ufstype=openstep"}, | |
306 | {Opt_onerror_panic, "onerror=panic"}, | |
307 | {Opt_onerror_lock, "onerror=lock"}, | |
308 | {Opt_onerror_umount, "onerror=umount"}, | |
309 | {Opt_onerror_repair, "onerror=repair"}, | |
310 | {Opt_err, NULL} | |
311 | }; | |
312 | ||
313 | static int ufs_parse_options (char * options, unsigned * mount_options) | |
314 | { | |
315 | char * p; | |
316 | ||
abf5d15f | 317 | UFSD("ENTER\n"); |
1da177e4 LT |
318 | |
319 | if (!options) | |
320 | return 1; | |
321 | ||
322 | while ((p = strsep(&options, ",")) != NULL) { | |
323 | substring_t args[MAX_OPT_ARGS]; | |
324 | int token; | |
325 | if (!*p) | |
326 | continue; | |
327 | ||
328 | token = match_token(p, tokens, args); | |
329 | switch (token) { | |
330 | case Opt_type_old: | |
331 | ufs_clear_opt (*mount_options, UFSTYPE); | |
332 | ufs_set_opt (*mount_options, UFSTYPE_OLD); | |
333 | break; | |
334 | case Opt_type_sunx86: | |
335 | ufs_clear_opt (*mount_options, UFSTYPE); | |
336 | ufs_set_opt (*mount_options, UFSTYPE_SUNx86); | |
337 | break; | |
338 | case Opt_type_sun: | |
339 | ufs_clear_opt (*mount_options, UFSTYPE); | |
340 | ufs_set_opt (*mount_options, UFSTYPE_SUN); | |
341 | break; | |
342 | case Opt_type_44bsd: | |
343 | ufs_clear_opt (*mount_options, UFSTYPE); | |
344 | ufs_set_opt (*mount_options, UFSTYPE_44BSD); | |
345 | break; | |
346 | case Opt_type_ufs2: | |
347 | ufs_clear_opt(*mount_options, UFSTYPE); | |
348 | ufs_set_opt(*mount_options, UFSTYPE_UFS2); | |
349 | break; | |
350 | case Opt_type_hp: | |
351 | ufs_clear_opt (*mount_options, UFSTYPE); | |
352 | ufs_set_opt (*mount_options, UFSTYPE_HP); | |
353 | break; | |
354 | case Opt_type_nextstepcd: | |
355 | ufs_clear_opt (*mount_options, UFSTYPE); | |
356 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); | |
357 | break; | |
358 | case Opt_type_nextstep: | |
359 | ufs_clear_opt (*mount_options, UFSTYPE); | |
360 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); | |
361 | break; | |
362 | case Opt_type_openstep: | |
363 | ufs_clear_opt (*mount_options, UFSTYPE); | |
364 | ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); | |
365 | break; | |
366 | case Opt_onerror_panic: | |
367 | ufs_clear_opt (*mount_options, ONERROR); | |
368 | ufs_set_opt (*mount_options, ONERROR_PANIC); | |
369 | break; | |
370 | case Opt_onerror_lock: | |
371 | ufs_clear_opt (*mount_options, ONERROR); | |
372 | ufs_set_opt (*mount_options, ONERROR_LOCK); | |
373 | break; | |
374 | case Opt_onerror_umount: | |
375 | ufs_clear_opt (*mount_options, ONERROR); | |
376 | ufs_set_opt (*mount_options, ONERROR_UMOUNT); | |
377 | break; | |
378 | case Opt_onerror_repair: | |
379 | printk("UFS-fs: Unable to do repair on error, " | |
380 | "will lock lock instead\n"); | |
381 | ufs_clear_opt (*mount_options, ONERROR); | |
382 | ufs_set_opt (*mount_options, ONERROR_REPAIR); | |
383 | break; | |
384 | default: | |
385 | printk("UFS-fs: Invalid option: \"%s\" " | |
386 | "or missing value\n", p); | |
387 | return 0; | |
388 | } | |
389 | } | |
390 | return 1; | |
391 | } | |
392 | ||
393 | /* | |
ee3ffd6c ED |
394 | * Diffrent types of UFS hold fs_cstotal in different |
395 | * places, and use diffrent data structure for it. | |
396 | * To make things simplier we just copy fs_cstotal to ufs_sb_private_info | |
1da177e4 | 397 | */ |
ee3ffd6c | 398 | static void ufs_setup_cstotal(struct super_block *sb) |
e295cfcb | 399 | { |
647b7e87 ED |
400 | struct ufs_sb_info *sbi = UFS_SB(sb); |
401 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
ee3ffd6c ED |
402 | struct ufs_super_block_first *usb1; |
403 | struct ufs_super_block_second *usb2; | |
647b7e87 | 404 | struct ufs_super_block_third *usb3; |
ee3ffd6c ED |
405 | unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
406 | ||
407 | UFSD("ENTER, mtype=%u\n", mtype); | |
408 | usb1 = ubh_get_usb_first(uspi); | |
409 | usb2 = ubh_get_usb_second(uspi); | |
410 | usb3 = ubh_get_usb_third(uspi); | |
411 | ||
412 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && | |
413 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || | |
414 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { | |
415 | /*we have statistic in different place, then usual*/ | |
416 | uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); | |
417 | uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); | |
418 | uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); | |
419 | uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); | |
420 | } else { | |
421 | uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); | |
422 | uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); | |
423 | uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); | |
424 | uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); | |
425 | } | |
426 | UFSD("EXIT\n"); | |
427 | } | |
428 | ||
429 | /* | |
430 | * Read on-disk structures associated with cylinder groups | |
431 | */ | |
432 | static int ufs_read_cylinder_structures(struct super_block *sb) | |
433 | { | |
434 | struct ufs_sb_info *sbi = UFS_SB(sb); | |
435 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
1da177e4 LT |
436 | struct ufs_buffer_head * ubh; |
437 | unsigned char * base, * space; | |
438 | unsigned size, blks, i; | |
ee3ffd6c ED |
439 | struct ufs_super_block_third *usb3; |
440 | ||
abf5d15f | 441 | UFSD("ENTER\n"); |
1da177e4 | 442 | |
ee3ffd6c | 443 | usb3 = ubh_get_usb_third(uspi); |
1da177e4 LT |
444 | /* |
445 | * Read cs structures from (usually) first data block | |
446 | * on the device. | |
447 | */ | |
448 | size = uspi->s_cssize; | |
449 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
450 | base = space = kmalloc(size, GFP_KERNEL); | |
451 | if (!base) | |
452 | goto failed; | |
e295cfcb | 453 | sbi->s_csp = (struct ufs_csum *)space; |
1da177e4 LT |
454 | for (i = 0; i < blks; i += uspi->s_fpb) { |
455 | size = uspi->s_bsize; | |
456 | if (i + uspi->s_fpb > blks) | |
457 | size = (blks - i) * uspi->s_fsize; | |
458 | ||
3313e292 | 459 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
7b4ee73e E |
460 | |
461 | if (!ubh) | |
462 | goto failed; | |
463 | ||
464 | ubh_ubhcpymem (space, ubh, size); | |
7b4ee73e | 465 | |
1da177e4 LT |
466 | space += size; |
467 | ubh_brelse (ubh); | |
468 | ubh = NULL; | |
469 | } | |
470 | ||
471 | /* | |
472 | * Read cylinder group (we read only first fragment from block | |
473 | * at this time) and prepare internal data structures for cg caching. | |
474 | */ | |
475 | if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) | |
476 | goto failed; | |
477 | for (i = 0; i < uspi->s_ncg; i++) | |
478 | sbi->s_ucg[i] = NULL; | |
479 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { | |
480 | sbi->s_ucpi[i] = NULL; | |
481 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; | |
482 | } | |
483 | for (i = 0; i < uspi->s_ncg; i++) { | |
abf5d15f | 484 | UFSD("read cg %u\n", i); |
1da177e4 LT |
485 | if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) |
486 | goto failed; | |
487 | if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) | |
488 | goto failed; | |
647b7e87 | 489 | |
1da177e4 | 490 | ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); |
1da177e4 LT |
491 | } |
492 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { | |
493 | if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) | |
494 | goto failed; | |
495 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; | |
496 | } | |
497 | sbi->s_cg_loaded = 0; | |
abf5d15f | 498 | UFSD("EXIT\n"); |
1da177e4 LT |
499 | return 1; |
500 | ||
501 | failed: | |
f99d49ad | 502 | kfree (base); |
1da177e4 LT |
503 | if (sbi->s_ucg) { |
504 | for (i = 0; i < uspi->s_ncg; i++) | |
f99d49ad JJ |
505 | if (sbi->s_ucg[i]) |
506 | brelse (sbi->s_ucg[i]); | |
1da177e4 LT |
507 | kfree (sbi->s_ucg); |
508 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) | |
f99d49ad | 509 | kfree (sbi->s_ucpi[i]); |
1da177e4 | 510 | } |
abf5d15f | 511 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
512 | return 0; |
513 | } | |
514 | ||
515 | /* | |
ee3ffd6c | 516 | * Sync our internal copy of fs_cstotal with disk |
1da177e4 | 517 | */ |
ee3ffd6c | 518 | static void ufs_put_cstotal(struct super_block *sb) |
e295cfcb | 519 | { |
ee3ffd6c ED |
520 | unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
521 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
522 | struct ufs_super_block_first *usb1; | |
523 | struct ufs_super_block_second *usb2; | |
524 | struct ufs_super_block_third *usb3; | |
525 | ||
526 | UFSD("ENTER\n"); | |
527 | usb1 = ubh_get_usb_first(uspi); | |
528 | usb2 = ubh_get_usb_second(uspi); | |
529 | usb3 = ubh_get_usb_third(uspi); | |
530 | ||
531 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && | |
532 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || | |
533 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { | |
534 | /*we have statistic in different place, then usual*/ | |
535 | usb2->fs_un.fs_u2.cs_ndir = | |
536 | cpu_to_fs64(sb, uspi->cs_total.cs_ndir); | |
537 | usb2->fs_un.fs_u2.cs_nbfree = | |
538 | cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); | |
539 | usb3->fs_un1.fs_u2.cs_nifree = | |
540 | cpu_to_fs64(sb, uspi->cs_total.cs_nifree); | |
541 | usb3->fs_un1.fs_u2.cs_nffree = | |
542 | cpu_to_fs64(sb, uspi->cs_total.cs_nffree); | |
543 | } else { | |
544 | usb1->fs_cstotal.cs_ndir = | |
545 | cpu_to_fs32(sb, uspi->cs_total.cs_ndir); | |
546 | usb1->fs_cstotal.cs_nbfree = | |
547 | cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); | |
548 | usb1->fs_cstotal.cs_nifree = | |
549 | cpu_to_fs32(sb, uspi->cs_total.cs_nifree); | |
550 | usb1->fs_cstotal.cs_nffree = | |
551 | cpu_to_fs32(sb, uspi->cs_total.cs_nffree); | |
552 | } | |
553 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); | |
3313e292 | 554 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
ee3ffd6c ED |
555 | UFSD("EXIT\n"); |
556 | } | |
557 | ||
558 | /** | |
559 | * ufs_put_super_internal() - put on-disk intrenal structures | |
560 | * @sb: pointer to super_block structure | |
561 | * Put on-disk structures associated with cylinder groups | |
562 | * and write them back to disk, also update cs_total on disk | |
563 | */ | |
564 | static void ufs_put_super_internal(struct super_block *sb) | |
565 | { | |
566 | struct ufs_sb_info *sbi = UFS_SB(sb); | |
567 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
1da177e4 LT |
568 | struct ufs_buffer_head * ubh; |
569 | unsigned char * base, * space; | |
570 | unsigned blks, size, i; | |
ee3ffd6c | 571 | |
1da177e4 | 572 | |
abf5d15f | 573 | UFSD("ENTER\n"); |
ee3ffd6c | 574 | ufs_put_cstotal(sb); |
1da177e4 LT |
575 | size = uspi->s_cssize; |
576 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
e295cfcb | 577 | base = space = (char*) sbi->s_csp; |
1da177e4 LT |
578 | for (i = 0; i < blks; i += uspi->s_fpb) { |
579 | size = uspi->s_bsize; | |
580 | if (i + uspi->s_fpb > blks) | |
581 | size = (blks - i) * uspi->s_fsize; | |
3313e292 | 582 | |
1da177e4 | 583 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
3313e292 | 584 | |
1da177e4 LT |
585 | ubh_memcpyubh (ubh, space, size); |
586 | space += size; | |
587 | ubh_mark_buffer_uptodate (ubh, 1); | |
588 | ubh_mark_buffer_dirty (ubh); | |
589 | ubh_brelse (ubh); | |
590 | } | |
591 | for (i = 0; i < sbi->s_cg_loaded; i++) { | |
592 | ufs_put_cylinder (sb, i); | |
593 | kfree (sbi->s_ucpi[i]); | |
594 | } | |
595 | for (; i < UFS_MAX_GROUP_LOADED; i++) | |
596 | kfree (sbi->s_ucpi[i]); | |
597 | for (i = 0; i < uspi->s_ncg; i++) | |
598 | brelse (sbi->s_ucg[i]); | |
599 | kfree (sbi->s_ucg); | |
600 | kfree (base); | |
abf5d15f | 601 | UFSD("EXIT\n"); |
1da177e4 LT |
602 | } |
603 | ||
604 | static int ufs_fill_super(struct super_block *sb, void *data, int silent) | |
605 | { | |
606 | struct ufs_sb_info * sbi; | |
607 | struct ufs_sb_private_info * uspi; | |
608 | struct ufs_super_block_first * usb1; | |
609 | struct ufs_super_block_second * usb2; | |
610 | struct ufs_super_block_third * usb3; | |
1da177e4 LT |
611 | struct ufs_buffer_head * ubh; |
612 | struct inode *inode; | |
613 | unsigned block_size, super_block_size; | |
614 | unsigned flags; | |
7b4ee73e | 615 | unsigned super_block_offset; |
1da177e4 LT |
616 | |
617 | uspi = NULL; | |
618 | ubh = NULL; | |
619 | flags = 0; | |
620 | ||
abf5d15f | 621 | UFSD("ENTER\n"); |
1da177e4 | 622 | |
f8314dc6 | 623 | sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); |
1da177e4 LT |
624 | if (!sbi) |
625 | goto failed_nomem; | |
626 | sb->s_fs_info = sbi; | |
1da177e4 | 627 | |
abf5d15f | 628 | UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); |
1da177e4 LT |
629 | |
630 | #ifndef CONFIG_UFS_FS_WRITE | |
631 | if (!(sb->s_flags & MS_RDONLY)) { | |
632 | printk("ufs was compiled with read-only support, " | |
633 | "can't be mounted as read-write\n"); | |
634 | goto failed; | |
635 | } | |
636 | #endif | |
637 | /* | |
638 | * Set default mount options | |
639 | * Parse mount options | |
640 | */ | |
641 | sbi->s_mount_opt = 0; | |
642 | ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); | |
643 | if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { | |
644 | printk("wrong mount options\n"); | |
645 | goto failed; | |
646 | } | |
647 | if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { | |
648 | if (!silent) | |
649 | printk("You didn't specify the type of your ufs filesystem\n\n" | |
650 | "mount -t ufs -o ufstype=" | |
c690a722 | 651 | "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" |
1da177e4 LT |
652 | ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " |
653 | "default is ufstype=old\n"); | |
654 | ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); | |
655 | } | |
656 | ||
657 | sbi->s_uspi = uspi = | |
658 | kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); | |
659 | if (!uspi) | |
660 | goto failed; | |
f336953b | 661 | uspi->s_dirblksize = UFS_SECTOR_SIZE; |
7b4ee73e E |
662 | super_block_offset=UFS_SBLOCK; |
663 | ||
1da177e4 LT |
664 | /* Keep 2Gig file limit. Some UFS variants need to override |
665 | this but as I don't know which I'll let those in the know loosen | |
666 | the rules */ | |
1da177e4 LT |
667 | switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { |
668 | case UFS_MOUNT_UFSTYPE_44BSD: | |
abf5d15f | 669 | UFSD("ufstype=44bsd\n"); |
1da177e4 LT |
670 | uspi->s_fsize = block_size = 512; |
671 | uspi->s_fmask = ~(512 - 1); | |
672 | uspi->s_fshift = 9; | |
673 | uspi->s_sbsize = super_block_size = 1536; | |
674 | uspi->s_sbbase = 0; | |
675 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; | |
676 | break; | |
677 | case UFS_MOUNT_UFSTYPE_UFS2: | |
abf5d15f | 678 | UFSD("ufstype=ufs2\n"); |
7b4ee73e | 679 | super_block_offset=SBLOCK_UFS2; |
1da177e4 LT |
680 | uspi->s_fsize = block_size = 512; |
681 | uspi->s_fmask = ~(512 - 1); | |
682 | uspi->s_fshift = 9; | |
683 | uspi->s_sbsize = super_block_size = 1536; | |
684 | uspi->s_sbbase = 0; | |
685 | flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; | |
1da177e4 LT |
686 | break; |
687 | ||
688 | case UFS_MOUNT_UFSTYPE_SUN: | |
abf5d15f | 689 | UFSD("ufstype=sun\n"); |
1da177e4 LT |
690 | uspi->s_fsize = block_size = 1024; |
691 | uspi->s_fmask = ~(1024 - 1); | |
692 | uspi->s_fshift = 10; | |
693 | uspi->s_sbsize = super_block_size = 2048; | |
694 | uspi->s_sbbase = 0; | |
695 | uspi->s_maxsymlinklen = 56; | |
696 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; | |
697 | break; | |
698 | ||
699 | case UFS_MOUNT_UFSTYPE_SUNx86: | |
abf5d15f | 700 | UFSD("ufstype=sunx86\n"); |
1da177e4 LT |
701 | uspi->s_fsize = block_size = 1024; |
702 | uspi->s_fmask = ~(1024 - 1); | |
703 | uspi->s_fshift = 10; | |
704 | uspi->s_sbsize = super_block_size = 2048; | |
705 | uspi->s_sbbase = 0; | |
706 | uspi->s_maxsymlinklen = 56; | |
707 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; | |
708 | break; | |
709 | ||
710 | case UFS_MOUNT_UFSTYPE_OLD: | |
abf5d15f | 711 | UFSD("ufstype=old\n"); |
1da177e4 LT |
712 | uspi->s_fsize = block_size = 1024; |
713 | uspi->s_fmask = ~(1024 - 1); | |
714 | uspi->s_fshift = 10; | |
715 | uspi->s_sbsize = super_block_size = 2048; | |
716 | uspi->s_sbbase = 0; | |
717 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
718 | if (!(sb->s_flags & MS_RDONLY)) { | |
719 | if (!silent) | |
720 | printk(KERN_INFO "ufstype=old is supported read-only\n"); | |
721 | sb->s_flags |= MS_RDONLY; | |
722 | } | |
723 | break; | |
724 | ||
725 | case UFS_MOUNT_UFSTYPE_NEXTSTEP: | |
f336953b | 726 | /*TODO: check may be we need set special dir block size?*/ |
abf5d15f | 727 | UFSD("ufstype=nextstep\n"); |
1da177e4 LT |
728 | uspi->s_fsize = block_size = 1024; |
729 | uspi->s_fmask = ~(1024 - 1); | |
730 | uspi->s_fshift = 10; | |
731 | uspi->s_sbsize = super_block_size = 2048; | |
732 | uspi->s_sbbase = 0; | |
733 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
734 | if (!(sb->s_flags & MS_RDONLY)) { | |
735 | if (!silent) | |
736 | printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); | |
737 | sb->s_flags |= MS_RDONLY; | |
738 | } | |
739 | break; | |
740 | ||
741 | case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: | |
f336953b | 742 | /*TODO: check may be we need set special dir block size?*/ |
abf5d15f | 743 | UFSD("ufstype=nextstep-cd\n"); |
1da177e4 LT |
744 | uspi->s_fsize = block_size = 2048; |
745 | uspi->s_fmask = ~(2048 - 1); | |
746 | uspi->s_fshift = 11; | |
747 | uspi->s_sbsize = super_block_size = 2048; | |
748 | uspi->s_sbbase = 0; | |
749 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
750 | if (!(sb->s_flags & MS_RDONLY)) { | |
751 | if (!silent) | |
752 | printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); | |
753 | sb->s_flags |= MS_RDONLY; | |
754 | } | |
755 | break; | |
756 | ||
757 | case UFS_MOUNT_UFSTYPE_OPENSTEP: | |
abf5d15f | 758 | UFSD("ufstype=openstep\n"); |
1da177e4 LT |
759 | uspi->s_fsize = block_size = 1024; |
760 | uspi->s_fmask = ~(1024 - 1); | |
761 | uspi->s_fshift = 10; | |
762 | uspi->s_sbsize = super_block_size = 2048; | |
763 | uspi->s_sbbase = 0; | |
f336953b | 764 | uspi->s_dirblksize = 1024; |
1da177e4 LT |
765 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
766 | if (!(sb->s_flags & MS_RDONLY)) { | |
767 | if (!silent) | |
768 | printk(KERN_INFO "ufstype=openstep is supported read-only\n"); | |
769 | sb->s_flags |= MS_RDONLY; | |
770 | } | |
771 | break; | |
772 | ||
773 | case UFS_MOUNT_UFSTYPE_HP: | |
abf5d15f | 774 | UFSD("ufstype=hp\n"); |
1da177e4 LT |
775 | uspi->s_fsize = block_size = 1024; |
776 | uspi->s_fmask = ~(1024 - 1); | |
777 | uspi->s_fshift = 10; | |
778 | uspi->s_sbsize = super_block_size = 2048; | |
779 | uspi->s_sbbase = 0; | |
780 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
781 | if (!(sb->s_flags & MS_RDONLY)) { | |
782 | if (!silent) | |
783 | printk(KERN_INFO "ufstype=hp is supported read-only\n"); | |
784 | sb->s_flags |= MS_RDONLY; | |
785 | } | |
786 | break; | |
787 | default: | |
788 | if (!silent) | |
789 | printk("unknown ufstype\n"); | |
790 | goto failed; | |
791 | } | |
792 | ||
793 | again: | |
794 | if (!sb_set_blocksize(sb, block_size)) { | |
795 | printk(KERN_ERR "UFS: failed to set blocksize\n"); | |
796 | goto failed; | |
797 | } | |
798 | ||
799 | /* | |
800 | * read ufs super block from device | |
801 | */ | |
7b4ee73e E |
802 | |
803 | ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); | |
804 | ||
1da177e4 LT |
805 | if (!ubh) |
806 | goto failed; | |
807 | ||
808 | ||
7b4ee73e E |
809 | usb1 = ubh_get_usb_first(uspi); |
810 | usb2 = ubh_get_usb_second(uspi); | |
811 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
812 | |
813 | /* | |
814 | * Check ufs magic number | |
815 | */ | |
816 | sbi->s_bytesex = BYTESEX_LE; | |
817 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { | |
818 | case UFS_MAGIC: | |
819 | case UFS2_MAGIC: | |
820 | case UFS_MAGIC_LFN: | |
821 | case UFS_MAGIC_FEA: | |
822 | case UFS_MAGIC_4GB: | |
823 | goto magic_found; | |
824 | } | |
825 | sbi->s_bytesex = BYTESEX_BE; | |
826 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { | |
827 | case UFS_MAGIC: | |
828 | case UFS2_MAGIC: | |
829 | case UFS_MAGIC_LFN: | |
830 | case UFS_MAGIC_FEA: | |
831 | case UFS_MAGIC_4GB: | |
832 | goto magic_found; | |
833 | } | |
834 | ||
835 | if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) | |
836 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) | |
837 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) | |
838 | && uspi->s_sbbase < 256) { | |
839 | ubh_brelse_uspi(uspi); | |
840 | ubh = NULL; | |
841 | uspi->s_sbbase += 8; | |
842 | goto again; | |
843 | } | |
844 | if (!silent) | |
845 | printk("ufs_read_super: bad magic number\n"); | |
846 | goto failed; | |
847 | ||
848 | magic_found: | |
849 | /* | |
850 | * Check block and fragment sizes | |
851 | */ | |
852 | uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); | |
853 | uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); | |
854 | uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); | |
855 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); | |
856 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); | |
857 | ||
9e8c4273 | 858 | if (!is_power_of_2(uspi->s_fsize)) { |
1da177e4 LT |
859 | printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", |
860 | uspi->s_fsize); | |
861 | goto failed; | |
862 | } | |
863 | if (uspi->s_fsize < 512) { | |
864 | printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", | |
865 | uspi->s_fsize); | |
866 | goto failed; | |
867 | } | |
868 | if (uspi->s_fsize > 4096) { | |
869 | printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", | |
870 | uspi->s_fsize); | |
871 | goto failed; | |
872 | } | |
9e8c4273 | 873 | if (!is_power_of_2(uspi->s_bsize)) { |
1da177e4 LT |
874 | printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", |
875 | uspi->s_bsize); | |
876 | goto failed; | |
877 | } | |
878 | if (uspi->s_bsize < 4096) { | |
879 | printk(KERN_ERR "ufs_read_super: block size %u is too small\n", | |
880 | uspi->s_bsize); | |
881 | goto failed; | |
882 | } | |
883 | if (uspi->s_bsize / uspi->s_fsize > 8) { | |
884 | printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", | |
885 | uspi->s_bsize / uspi->s_fsize); | |
886 | goto failed; | |
887 | } | |
888 | if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { | |
889 | ubh_brelse_uspi(uspi); | |
890 | ubh = NULL; | |
891 | block_size = uspi->s_fsize; | |
892 | super_block_size = uspi->s_sbsize; | |
abf5d15f | 893 | UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); |
1da177e4 LT |
894 | goto again; |
895 | } | |
896 | ||
647b7e87 | 897 | |
3313e292 | 898 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
1da177e4 LT |
899 | |
900 | /* | |
901 | * Check, if file system was correctly unmounted. | |
902 | * If not, make it read only. | |
903 | */ | |
904 | if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || | |
905 | ((flags & UFS_ST_MASK) == UFS_ST_OLD) || | |
906 | (((flags & UFS_ST_MASK) == UFS_ST_SUN || | |
907 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && | |
908 | (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { | |
909 | switch(usb1->fs_clean) { | |
910 | case UFS_FSCLEAN: | |
abf5d15f | 911 | UFSD("fs is clean\n"); |
1da177e4 LT |
912 | break; |
913 | case UFS_FSSTABLE: | |
abf5d15f | 914 | UFSD("fs is stable\n"); |
1da177e4 LT |
915 | break; |
916 | case UFS_FSOSF1: | |
abf5d15f | 917 | UFSD("fs is DEC OSF/1\n"); |
1da177e4 LT |
918 | break; |
919 | case UFS_FSACTIVE: | |
920 | printk("ufs_read_super: fs is active\n"); | |
921 | sb->s_flags |= MS_RDONLY; | |
922 | break; | |
923 | case UFS_FSBAD: | |
924 | printk("ufs_read_super: fs is bad\n"); | |
925 | sb->s_flags |= MS_RDONLY; | |
926 | break; | |
927 | default: | |
928 | printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); | |
929 | sb->s_flags |= MS_RDONLY; | |
930 | break; | |
931 | } | |
ee3ffd6c | 932 | } else { |
1da177e4 LT |
933 | printk("ufs_read_super: fs needs fsck\n"); |
934 | sb->s_flags |= MS_RDONLY; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Read ufs_super_block into internal data structures | |
939 | */ | |
940 | sb->s_op = &ufs_super_ops; | |
941 | sb->dq_op = NULL; /***/ | |
942 | sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); | |
943 | ||
944 | uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); | |
945 | uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); | |
946 | uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); | |
947 | uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); | |
948 | uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); | |
949 | uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); | |
950 | ||
951 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
647b7e87 ED |
952 | uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); |
953 | uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); | |
954 | } else { | |
1da177e4 LT |
955 | uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); |
956 | uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); | |
957 | } | |
958 | ||
959 | uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); | |
960 | /* s_bsize already set */ | |
961 | /* s_fsize already set */ | |
962 | uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); | |
963 | uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); | |
964 | uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); | |
965 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); | |
966 | uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); | |
967 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); | |
abf5d15f ED |
968 | UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, |
969 | uspi->s_fshift); | |
1da177e4 LT |
970 | uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); |
971 | uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); | |
972 | /* s_sbsize already set */ | |
973 | uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); | |
974 | uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); | |
975 | uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); | |
976 | uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); | |
977 | uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); | |
978 | uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); | |
979 | uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); | |
980 | uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); | |
3313e292 ED |
981 | |
982 | if (uspi->fs_magic == UFS2_MAGIC) | |
983 | uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); | |
984 | else | |
985 | uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); | |
986 | ||
1da177e4 LT |
987 | uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); |
988 | uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); | |
989 | uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); | |
990 | uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); | |
991 | uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); | |
992 | uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); | |
993 | uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); | |
647b7e87 ED |
994 | uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); |
995 | uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); | |
1da177e4 LT |
996 | uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); |
997 | uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); | |
998 | uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); | |
999 | uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); | |
1000 | uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); | |
1001 | uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); | |
1002 | ||
1003 | /* | |
1004 | * Compute another frequently used values | |
1005 | */ | |
1006 | uspi->s_fpbmask = uspi->s_fpb - 1; | |
abf5d15f | 1007 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
1da177e4 | 1008 | uspi->s_apbshift = uspi->s_bshift - 3; |
abf5d15f | 1009 | else |
1da177e4 | 1010 | uspi->s_apbshift = uspi->s_bshift - 2; |
abf5d15f | 1011 | |
1da177e4 LT |
1012 | uspi->s_2apbshift = uspi->s_apbshift * 2; |
1013 | uspi->s_3apbshift = uspi->s_apbshift * 3; | |
1014 | uspi->s_apb = 1 << uspi->s_apbshift; | |
1015 | uspi->s_2apb = 1 << uspi->s_2apbshift; | |
1016 | uspi->s_3apb = 1 << uspi->s_3apbshift; | |
1017 | uspi->s_apbmask = uspi->s_apb - 1; | |
1018 | uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; | |
1019 | uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; | |
1020 | uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; | |
1021 | uspi->s_bpf = uspi->s_fsize << 3; | |
1022 | uspi->s_bpfshift = uspi->s_fshift + 3; | |
1023 | uspi->s_bpfmask = uspi->s_bpf - 1; | |
1024 | if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == | |
1025 | UFS_MOUNT_UFSTYPE_44BSD) | |
1026 | uspi->s_maxsymlinklen = | |
647b7e87 | 1027 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); |
1da177e4 LT |
1028 | |
1029 | sbi->s_flags = flags; | |
1030 | ||
1031 | inode = iget(sb, UFS_ROOTINO); | |
1032 | if (!inode || is_bad_inode(inode)) | |
1033 | goto failed; | |
1034 | sb->s_root = d_alloc_root(inode); | |
1035 | if (!sb->s_root) | |
1036 | goto dalloc_failed; | |
1037 | ||
ee3ffd6c | 1038 | ufs_setup_cstotal(sb); |
1da177e4 LT |
1039 | /* |
1040 | * Read cylinder group structures | |
1041 | */ | |
1042 | if (!(sb->s_flags & MS_RDONLY)) | |
1043 | if (!ufs_read_cylinder_structures(sb)) | |
1044 | goto failed; | |
1045 | ||
abf5d15f | 1046 | UFSD("EXIT\n"); |
1da177e4 LT |
1047 | return 0; |
1048 | ||
1049 | dalloc_failed: | |
1050 | iput(inode); | |
1051 | failed: | |
f99d49ad JJ |
1052 | if (ubh) |
1053 | ubh_brelse_uspi (uspi); | |
1054 | kfree (uspi); | |
1055 | kfree(sbi); | |
1da177e4 | 1056 | sb->s_fs_info = NULL; |
abf5d15f | 1057 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
1058 | return -EINVAL; |
1059 | ||
1060 | failed_nomem: | |
abf5d15f | 1061 | UFSD("EXIT (NOMEM)\n"); |
1da177e4 LT |
1062 | return -ENOMEM; |
1063 | } | |
1064 | ||
647b7e87 ED |
1065 | static void ufs_write_super(struct super_block *sb) |
1066 | { | |
1da177e4 LT |
1067 | struct ufs_sb_private_info * uspi; |
1068 | struct ufs_super_block_first * usb1; | |
1069 | struct ufs_super_block_third * usb3; | |
1070 | unsigned flags; | |
1071 | ||
1072 | lock_kernel(); | |
abf5d15f | 1073 | UFSD("ENTER\n"); |
1da177e4 LT |
1074 | flags = UFS_SB(sb)->s_flags; |
1075 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e E |
1076 | usb1 = ubh_get_usb_first(uspi); |
1077 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
1078 | |
1079 | if (!(sb->s_flags & MS_RDONLY)) { | |
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)); | |
ee3ffd6c | 1085 | ufs_put_cstotal(sb); |
1da177e4 LT |
1086 | } |
1087 | sb->s_dirt = 0; | |
abf5d15f | 1088 | UFSD("EXIT\n"); |
1da177e4 LT |
1089 | unlock_kernel(); |
1090 | } | |
1091 | ||
abf5d15f | 1092 | static void ufs_put_super(struct super_block *sb) |
1da177e4 LT |
1093 | { |
1094 | struct ufs_sb_info * sbi = UFS_SB(sb); | |
1095 | ||
abf5d15f | 1096 | UFSD("ENTER\n"); |
1da177e4 LT |
1097 | |
1098 | if (!(sb->s_flags & MS_RDONLY)) | |
ee3ffd6c | 1099 | ufs_put_super_internal(sb); |
1da177e4 LT |
1100 | |
1101 | ubh_brelse_uspi (sbi->s_uspi); | |
1102 | kfree (sbi->s_uspi); | |
1103 | kfree (sbi); | |
1104 | sb->s_fs_info = NULL; | |
647b7e87 | 1105 | UFSD("EXIT\n"); |
1da177e4 LT |
1106 | return; |
1107 | } | |
1108 | ||
1109 | ||
1110 | static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) | |
1111 | { | |
1112 | struct ufs_sb_private_info * uspi; | |
1113 | struct ufs_super_block_first * usb1; | |
1114 | struct ufs_super_block_third * usb3; | |
1115 | unsigned new_mount_opt, ufstype; | |
1116 | unsigned flags; | |
1117 | ||
1118 | uspi = UFS_SB(sb)->s_uspi; | |
1119 | flags = UFS_SB(sb)->s_flags; | |
7b4ee73e E |
1120 | usb1 = ubh_get_usb_first(uspi); |
1121 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
1122 | |
1123 | /* | |
1124 | * Allow the "check" option to be passed as a remount option. | |
1125 | * It is not possible to change ufstype option during remount | |
1126 | */ | |
1127 | ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; | |
1128 | new_mount_opt = 0; | |
1129 | ufs_set_opt (new_mount_opt, ONERROR_LOCK); | |
1130 | if (!ufs_parse_options (data, &new_mount_opt)) | |
1131 | return -EINVAL; | |
1132 | if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { | |
1133 | new_mount_opt |= ufstype; | |
ee3ffd6c | 1134 | } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { |
1da177e4 LT |
1135 | printk("ufstype can't be changed during remount\n"); |
1136 | return -EINVAL; | |
1137 | } | |
1138 | ||
1139 | if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { | |
1140 | UFS_SB(sb)->s_mount_opt = new_mount_opt; | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * fs was mouted as rw, remounting ro | |
1146 | */ | |
1147 | if (*mount_flags & MS_RDONLY) { | |
ee3ffd6c | 1148 | ufs_put_super_internal(sb); |
1da177e4 LT |
1149 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1150 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN | |
1151 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) | |
1152 | ufs_set_fs_state(sb, usb1, usb3, | |
1153 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); | |
9695ef16 | 1154 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
1da177e4 LT |
1155 | sb->s_dirt = 0; |
1156 | sb->s_flags |= MS_RDONLY; | |
ee3ffd6c | 1157 | } else { |
1da177e4 LT |
1158 | /* |
1159 | * fs was mounted as ro, remounting rw | |
1160 | */ | |
1da177e4 LT |
1161 | #ifndef CONFIG_UFS_FS_WRITE |
1162 | printk("ufs was compiled with read-only support, " | |
1163 | "can't be mounted as read-write\n"); | |
1164 | return -EINVAL; | |
1165 | #else | |
1166 | if (ufstype != UFS_MOUNT_UFSTYPE_SUN && | |
1167 | ufstype != UFS_MOUNT_UFSTYPE_44BSD && | |
cbcae39f ED |
1168 | ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && |
1169 | ufstype != UFS_MOUNT_UFSTYPE_UFS2) { | |
1da177e4 LT |
1170 | printk("this ufstype is read-only supported\n"); |
1171 | return -EINVAL; | |
1172 | } | |
ee3ffd6c | 1173 | if (!ufs_read_cylinder_structures(sb)) { |
1da177e4 LT |
1174 | printk("failed during remounting\n"); |
1175 | return -EPERM; | |
1176 | } | |
1177 | sb->s_flags &= ~MS_RDONLY; | |
1178 | #endif | |
1179 | } | |
1180 | UFS_SB(sb)->s_mount_opt = new_mount_opt; | |
1181 | return 0; | |
1182 | } | |
1183 | ||
647b7e87 | 1184 | static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1185 | { |
726c3342 | 1186 | struct super_block *sb = dentry->d_sb; |
647b7e87 ED |
1187 | struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; |
1188 | unsigned flags = UFS_SB(sb)->s_flags; | |
1189 | struct ufs_super_block_first *usb1; | |
1190 | struct ufs_super_block_second *usb2; | |
1191 | struct ufs_super_block_third *usb3; | |
1da177e4 LT |
1192 | |
1193 | lock_kernel(); | |
1194 | ||
647b7e87 ED |
1195 | usb1 = ubh_get_usb_first(uspi); |
1196 | usb2 = ubh_get_usb_second(uspi); | |
1197 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 | 1198 | |
1da177e4 LT |
1199 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1200 | buf->f_type = UFS2_MAGIC; | |
647b7e87 | 1201 | buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
647b7e87 | 1202 | } else { |
1da177e4 LT |
1203 | buf->f_type = UFS_MAGIC; |
1204 | buf->f_blocks = uspi->s_dsize; | |
1da177e4 | 1205 | } |
ee3ffd6c ED |
1206 | buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + |
1207 | uspi->cs_total.cs_nffree; | |
1208 | buf->f_ffree = uspi->cs_total.cs_nifree; | |
1da177e4 LT |
1209 | buf->f_bsize = sb->s_blocksize; |
1210 | buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) | |
1211 | ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; | |
1212 | buf->f_files = uspi->s_ncg * uspi->s_ipg; | |
1213 | buf->f_namelen = UFS_MAXNAMLEN; | |
1214 | ||
1215 | unlock_kernel(); | |
1216 | ||
1217 | return 0; | |
1218 | } | |
1219 | ||
e18b890b | 1220 | static struct kmem_cache * ufs_inode_cachep; |
1da177e4 LT |
1221 | |
1222 | static struct inode *ufs_alloc_inode(struct super_block *sb) | |
1223 | { | |
1224 | struct ufs_inode_info *ei; | |
e94b1766 | 1225 | ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1226 | if (!ei) |
1227 | return NULL; | |
1228 | ei->vfs_inode.i_version = 1; | |
1229 | return &ei->vfs_inode; | |
1230 | } | |
1231 | ||
1232 | static void ufs_destroy_inode(struct inode *inode) | |
1233 | { | |
1234 | kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); | |
1235 | } | |
1236 | ||
e18b890b | 1237 | static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
1238 | { |
1239 | struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; | |
1240 | ||
a35afb83 | 1241 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 1242 | } |
20c2df83 | 1243 | |
1da177e4 LT |
1244 | static int init_inodecache(void) |
1245 | { | |
1246 | ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", | |
1247 | sizeof(struct ufs_inode_info), | |
fffb60f9 PJ |
1248 | 0, (SLAB_RECLAIM_ACCOUNT| |
1249 | SLAB_MEM_SPREAD), | |
20c2df83 | 1250 | init_once); |
1da177e4 LT |
1251 | if (ufs_inode_cachep == NULL) |
1252 | return -ENOMEM; | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | static void destroy_inodecache(void) | |
1257 | { | |
1a1d92c1 | 1258 | kmem_cache_destroy(ufs_inode_cachep); |
1da177e4 LT |
1259 | } |
1260 | ||
1261 | #ifdef CONFIG_QUOTA | |
1262 | static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); | |
1263 | static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); | |
1264 | #endif | |
1265 | ||
ee9b6d61 | 1266 | static const struct super_operations ufs_super_ops = { |
1da177e4 LT |
1267 | .alloc_inode = ufs_alloc_inode, |
1268 | .destroy_inode = ufs_destroy_inode, | |
1269 | .read_inode = ufs_read_inode, | |
1270 | .write_inode = ufs_write_inode, | |
1271 | .delete_inode = ufs_delete_inode, | |
1272 | .put_super = ufs_put_super, | |
1273 | .write_super = ufs_write_super, | |
1274 | .statfs = ufs_statfs, | |
1275 | .remount_fs = ufs_remount, | |
1276 | #ifdef CONFIG_QUOTA | |
1277 | .quota_read = ufs_quota_read, | |
1278 | .quota_write = ufs_quota_write, | |
1279 | #endif | |
1280 | }; | |
1281 | ||
1282 | #ifdef CONFIG_QUOTA | |
1283 | ||
1284 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
1285 | * acquiring the locks... As quota files are never truncated and quota code | |
1286 | * itself serializes the operations (and noone else should touch the files) | |
1287 | * we don't have to be afraid of races */ | |
1288 | static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, | |
1289 | size_t len, loff_t off) | |
1290 | { | |
1291 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
1292 | sector_t blk = off >> sb->s_blocksize_bits; | |
1293 | int err = 0; | |
1294 | int offset = off & (sb->s_blocksize - 1); | |
1295 | int tocopy; | |
1296 | size_t toread; | |
1297 | struct buffer_head *bh; | |
1298 | loff_t i_size = i_size_read(inode); | |
1299 | ||
1300 | if (off > i_size) | |
1301 | return 0; | |
1302 | if (off+len > i_size) | |
1303 | len = i_size-off; | |
1304 | toread = len; | |
1305 | while (toread > 0) { | |
1306 | tocopy = sb->s_blocksize - offset < toread ? | |
1307 | sb->s_blocksize - offset : toread; | |
1308 | ||
1309 | bh = ufs_bread(inode, blk, 0, &err); | |
1310 | if (err) | |
1311 | return err; | |
1312 | if (!bh) /* A hole? */ | |
1313 | memset(data, 0, tocopy); | |
1314 | else { | |
1315 | memcpy(data, bh->b_data+offset, tocopy); | |
1316 | brelse(bh); | |
1317 | } | |
1318 | offset = 0; | |
1319 | toread -= tocopy; | |
1320 | data += tocopy; | |
1321 | blk++; | |
1322 | } | |
1323 | return len; | |
1324 | } | |
1325 | ||
1326 | /* Write to quotafile */ | |
1327 | static ssize_t ufs_quota_write(struct super_block *sb, int type, | |
1328 | const char *data, size_t len, loff_t off) | |
1329 | { | |
1330 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
1331 | sector_t blk = off >> sb->s_blocksize_bits; | |
1332 | int err = 0; | |
1333 | int offset = off & (sb->s_blocksize - 1); | |
1334 | int tocopy; | |
1335 | size_t towrite = len; | |
1336 | struct buffer_head *bh; | |
1337 | ||
5c81a419 | 1338 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1da177e4 LT |
1339 | while (towrite > 0) { |
1340 | tocopy = sb->s_blocksize - offset < towrite ? | |
1341 | sb->s_blocksize - offset : towrite; | |
1342 | ||
1343 | bh = ufs_bread(inode, blk, 1, &err); | |
1344 | if (!bh) | |
1345 | goto out; | |
1346 | lock_buffer(bh); | |
1347 | memcpy(bh->b_data+offset, data, tocopy); | |
1348 | flush_dcache_page(bh->b_page); | |
1349 | set_buffer_uptodate(bh); | |
1350 | mark_buffer_dirty(bh); | |
1351 | unlock_buffer(bh); | |
1352 | brelse(bh); | |
1353 | offset = 0; | |
1354 | towrite -= tocopy; | |
1355 | data += tocopy; | |
1356 | blk++; | |
1357 | } | |
1358 | out: | |
15b2fe39 | 1359 | if (len == towrite) { |
1b1dcc1b | 1360 | mutex_unlock(&inode->i_mutex); |
1da177e4 | 1361 | return err; |
15b2fe39 | 1362 | } |
1da177e4 LT |
1363 | if (inode->i_size < off+len-towrite) |
1364 | i_size_write(inode, off+len-towrite); | |
1365 | inode->i_version++; | |
1366 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
1367 | mark_inode_dirty(inode); | |
1b1dcc1b | 1368 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
1369 | return len - towrite; |
1370 | } | |
1371 | ||
1372 | #endif | |
1373 | ||
454e2398 DH |
1374 | static int ufs_get_sb(struct file_system_type *fs_type, |
1375 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1376 | { |
454e2398 | 1377 | return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); |
1da177e4 LT |
1378 | } |
1379 | ||
1380 | static struct file_system_type ufs_fs_type = { | |
1381 | .owner = THIS_MODULE, | |
1382 | .name = "ufs", | |
1383 | .get_sb = ufs_get_sb, | |
1384 | .kill_sb = kill_block_super, | |
1385 | .fs_flags = FS_REQUIRES_DEV, | |
1386 | }; | |
1387 | ||
1388 | static int __init init_ufs_fs(void) | |
1389 | { | |
1390 | int err = init_inodecache(); | |
1391 | if (err) | |
1392 | goto out1; | |
1393 | err = register_filesystem(&ufs_fs_type); | |
1394 | if (err) | |
1395 | goto out; | |
1396 | return 0; | |
1397 | out: | |
1398 | destroy_inodecache(); | |
1399 | out1: | |
1400 | return err; | |
1401 | } | |
1402 | ||
1403 | static void __exit exit_ufs_fs(void) | |
1404 | { | |
1405 | unregister_filesystem(&ufs_fs_type); | |
1406 | destroy_inodecache(); | |
1407 | } | |
1408 | ||
1409 | module_init(init_ufs_fs) | |
1410 | module_exit(exit_ufs_fs) | |
1411 | MODULE_LICENSE("GPL"); |