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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 | * | |
64 | */ | |
65 | ||
66 | ||
1da177e4 LT |
67 | #include <linux/module.h> |
68 | #include <linux/bitops.h> | |
69 | ||
70 | #include <stdarg.h> | |
71 | ||
72 | #include <asm/uaccess.h> | |
73 | #include <asm/system.h> | |
74 | ||
75 | #include <linux/errno.h> | |
76 | #include <linux/fs.h> | |
77 | #include <linux/ufs_fs.h> | |
78 | #include <linux/slab.h> | |
79 | #include <linux/time.h> | |
80 | #include <linux/stat.h> | |
81 | #include <linux/string.h> | |
82 | #include <linux/blkdev.h> | |
83 | #include <linux/init.h> | |
84 | #include <linux/parser.h> | |
85 | #include <linux/smp_lock.h> | |
86 | #include <linux/buffer_head.h> | |
87 | #include <linux/vfs.h> | |
88 | ||
89 | #include "swab.h" | |
90 | #include "util.h" | |
91 | ||
abf5d15f | 92 | #ifdef CONFIG_UFS_DEBUG |
1da177e4 LT |
93 | /* |
94 | * Print contents of ufs_super_block, useful for debugging | |
95 | */ | |
647b7e87 ED |
96 | static void ufs_print_super_stuff(struct super_block *sb, unsigned flags, |
97 | struct ufs_super_block_first *usb1, | |
98 | struct ufs_super_block_second *usb2, | |
99 | struct ufs_super_block_third *usb3) | |
1da177e4 LT |
100 | { |
101 | printk("ufs_print_super_stuff\n"); | |
647b7e87 ED |
102 | printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); |
103 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
104 | printk(" fs_size: %llu\n", (unsigned long long) | |
105 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); | |
106 | printk(" fs_dsize: %llu\n", (unsigned long long) | |
107 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); | |
108 | printk(" bsize: %u\n", | |
109 | fs32_to_cpu(sb, usb1->fs_bsize)); | |
110 | printk(" fsize: %u\n", | |
111 | fs32_to_cpu(sb, usb1->fs_fsize)); | |
112 | printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); | |
113 | printk(" fs_sblockloc: %llu\n", (unsigned long long) | |
114 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); | |
115 | printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) | |
116 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); | |
117 | printk(" cs_nbfree(No of free blocks): %llu\n", | |
118 | (unsigned long long) | |
119 | fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); | |
120 | } else { | |
121 | printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); | |
122 | printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); | |
123 | printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); | |
124 | printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); | |
125 | printk(" cgoffset: %u\n", | |
126 | fs32_to_cpu(sb, usb1->fs_cgoffset)); | |
127 | printk(" ~cgmask: 0x%x\n", | |
128 | ~fs32_to_cpu(sb, usb1->fs_cgmask)); | |
129 | printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); | |
130 | printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); | |
131 | printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); | |
132 | printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); | |
133 | printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); | |
134 | printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); | |
135 | printk(" fragshift: %u\n", | |
136 | fs32_to_cpu(sb, usb1->fs_fragshift)); | |
137 | printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); | |
138 | printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); | |
139 | printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); | |
140 | printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); | |
141 | printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); | |
142 | printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); | |
143 | printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); | |
144 | printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); | |
145 | printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); | |
146 | printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); | |
147 | printk(" fstodb: %u\n", | |
148 | fs32_to_cpu(sb, usb1->fs_fsbtodb)); | |
149 | printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); | |
150 | printk(" ndir %u\n", | |
151 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); | |
152 | printk(" nifree %u\n", | |
153 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); | |
154 | printk(" nbfree %u\n", | |
155 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); | |
156 | printk(" nffree %u\n", | |
157 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); | |
158 | } | |
1da177e4 LT |
159 | printk("\n"); |
160 | } | |
161 | ||
162 | /* | |
163 | * Print contents of ufs_cylinder_group, useful for debugging | |
164 | */ | |
647b7e87 ED |
165 | static void ufs_print_cylinder_stuff(struct super_block *sb, |
166 | struct ufs_cylinder_group *cg) | |
1da177e4 LT |
167 | { |
168 | printk("\nufs_print_cylinder_stuff\n"); | |
96710b29 | 169 | printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); |
1da177e4 LT |
170 | printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); |
171 | printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); | |
172 | printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); | |
173 | printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); | |
174 | printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); | |
175 | printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); | |
176 | printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); | |
177 | printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); | |
178 | printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); | |
179 | printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); | |
180 | printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); | |
181 | printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); | |
182 | printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); | |
183 | printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", | |
184 | fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), | |
185 | fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), | |
186 | fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), | |
187 | fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); | |
188 | printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); | |
189 | printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); | |
190 | printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); | |
191 | printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); | |
192 | printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); | |
647b7e87 ED |
193 | printk(" clustersumoff %u\n", |
194 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); | |
195 | printk(" clusteroff %u\n", | |
196 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); | |
197 | printk(" nclusterblks %u\n", | |
198 | fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); | |
1da177e4 LT |
199 | printk("\n"); |
200 | } | |
647b7e87 ED |
201 | #else |
202 | # define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/ | |
203 | # define ufs_print_cylinder_stuff(sb, cg) /**/ | |
abf5d15f | 204 | #endif /* CONFIG_UFS_DEBUG */ |
1da177e4 LT |
205 | |
206 | static struct super_operations ufs_super_ops; | |
207 | ||
208 | static char error_buf[1024]; | |
209 | ||
210 | void ufs_error (struct super_block * sb, const char * function, | |
211 | const char * fmt, ...) | |
212 | { | |
213 | struct ufs_sb_private_info * uspi; | |
214 | struct ufs_super_block_first * usb1; | |
215 | va_list args; | |
216 | ||
217 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 218 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
219 | |
220 | if (!(sb->s_flags & MS_RDONLY)) { | |
221 | usb1->fs_clean = UFS_FSBAD; | |
9695ef16 | 222 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
1da177e4 LT |
223 | sb->s_dirt = 1; |
224 | sb->s_flags |= MS_RDONLY; | |
225 | } | |
226 | va_start (args, fmt); | |
227 | vsprintf (error_buf, fmt, args); | |
228 | va_end (args); | |
229 | switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { | |
230 | case UFS_MOUNT_ONERROR_PANIC: | |
231 | panic ("UFS-fs panic (device %s): %s: %s\n", | |
232 | sb->s_id, function, error_buf); | |
233 | ||
234 | case UFS_MOUNT_ONERROR_LOCK: | |
235 | case UFS_MOUNT_ONERROR_UMOUNT: | |
236 | case UFS_MOUNT_ONERROR_REPAIR: | |
237 | printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", | |
238 | sb->s_id, function, error_buf); | |
239 | } | |
240 | } | |
241 | ||
242 | void ufs_panic (struct super_block * sb, const char * function, | |
243 | const char * fmt, ...) | |
244 | { | |
245 | struct ufs_sb_private_info * uspi; | |
246 | struct ufs_super_block_first * usb1; | |
247 | va_list args; | |
248 | ||
249 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 250 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
251 | |
252 | if (!(sb->s_flags & MS_RDONLY)) { | |
253 | usb1->fs_clean = UFS_FSBAD; | |
9695ef16 | 254 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); |
1da177e4 LT |
255 | sb->s_dirt = 1; |
256 | } | |
257 | va_start (args, fmt); | |
258 | vsprintf (error_buf, fmt, args); | |
259 | va_end (args); | |
260 | sb->s_flags |= MS_RDONLY; | |
261 | printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", | |
262 | sb->s_id, function, error_buf); | |
263 | } | |
264 | ||
265 | void ufs_warning (struct super_block * sb, const char * function, | |
266 | const char * fmt, ...) | |
267 | { | |
268 | va_list args; | |
269 | ||
270 | va_start (args, fmt); | |
271 | vsprintf (error_buf, fmt, args); | |
272 | va_end (args); | |
273 | printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", | |
274 | sb->s_id, function, error_buf); | |
275 | } | |
276 | ||
277 | enum { | |
278 | Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, | |
279 | Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, | |
280 | Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, | |
281 | Opt_onerror_umount, Opt_onerror_repair, Opt_err | |
282 | }; | |
283 | ||
284 | static match_table_t tokens = { | |
285 | {Opt_type_old, "ufstype=old"}, | |
286 | {Opt_type_sunx86, "ufstype=sunx86"}, | |
287 | {Opt_type_sun, "ufstype=sun"}, | |
288 | {Opt_type_44bsd, "ufstype=44bsd"}, | |
289 | {Opt_type_ufs2, "ufstype=ufs2"}, | |
290 | {Opt_type_ufs2, "ufstype=5xbsd"}, | |
291 | {Opt_type_hp, "ufstype=hp"}, | |
292 | {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, | |
293 | {Opt_type_nextstep, "ufstype=nextstep"}, | |
294 | {Opt_type_openstep, "ufstype=openstep"}, | |
295 | {Opt_onerror_panic, "onerror=panic"}, | |
296 | {Opt_onerror_lock, "onerror=lock"}, | |
297 | {Opt_onerror_umount, "onerror=umount"}, | |
298 | {Opt_onerror_repair, "onerror=repair"}, | |
299 | {Opt_err, NULL} | |
300 | }; | |
301 | ||
302 | static int ufs_parse_options (char * options, unsigned * mount_options) | |
303 | { | |
304 | char * p; | |
305 | ||
abf5d15f | 306 | UFSD("ENTER\n"); |
1da177e4 LT |
307 | |
308 | if (!options) | |
309 | return 1; | |
310 | ||
311 | while ((p = strsep(&options, ",")) != NULL) { | |
312 | substring_t args[MAX_OPT_ARGS]; | |
313 | int token; | |
314 | if (!*p) | |
315 | continue; | |
316 | ||
317 | token = match_token(p, tokens, args); | |
318 | switch (token) { | |
319 | case Opt_type_old: | |
320 | ufs_clear_opt (*mount_options, UFSTYPE); | |
321 | ufs_set_opt (*mount_options, UFSTYPE_OLD); | |
322 | break; | |
323 | case Opt_type_sunx86: | |
324 | ufs_clear_opt (*mount_options, UFSTYPE); | |
325 | ufs_set_opt (*mount_options, UFSTYPE_SUNx86); | |
326 | break; | |
327 | case Opt_type_sun: | |
328 | ufs_clear_opt (*mount_options, UFSTYPE); | |
329 | ufs_set_opt (*mount_options, UFSTYPE_SUN); | |
330 | break; | |
331 | case Opt_type_44bsd: | |
332 | ufs_clear_opt (*mount_options, UFSTYPE); | |
333 | ufs_set_opt (*mount_options, UFSTYPE_44BSD); | |
334 | break; | |
335 | case Opt_type_ufs2: | |
336 | ufs_clear_opt(*mount_options, UFSTYPE); | |
337 | ufs_set_opt(*mount_options, UFSTYPE_UFS2); | |
338 | break; | |
339 | case Opt_type_hp: | |
340 | ufs_clear_opt (*mount_options, UFSTYPE); | |
341 | ufs_set_opt (*mount_options, UFSTYPE_HP); | |
342 | break; | |
343 | case Opt_type_nextstepcd: | |
344 | ufs_clear_opt (*mount_options, UFSTYPE); | |
345 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); | |
346 | break; | |
347 | case Opt_type_nextstep: | |
348 | ufs_clear_opt (*mount_options, UFSTYPE); | |
349 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); | |
350 | break; | |
351 | case Opt_type_openstep: | |
352 | ufs_clear_opt (*mount_options, UFSTYPE); | |
353 | ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); | |
354 | break; | |
355 | case Opt_onerror_panic: | |
356 | ufs_clear_opt (*mount_options, ONERROR); | |
357 | ufs_set_opt (*mount_options, ONERROR_PANIC); | |
358 | break; | |
359 | case Opt_onerror_lock: | |
360 | ufs_clear_opt (*mount_options, ONERROR); | |
361 | ufs_set_opt (*mount_options, ONERROR_LOCK); | |
362 | break; | |
363 | case Opt_onerror_umount: | |
364 | ufs_clear_opt (*mount_options, ONERROR); | |
365 | ufs_set_opt (*mount_options, ONERROR_UMOUNT); | |
366 | break; | |
367 | case Opt_onerror_repair: | |
368 | printk("UFS-fs: Unable to do repair on error, " | |
369 | "will lock lock instead\n"); | |
370 | ufs_clear_opt (*mount_options, ONERROR); | |
371 | ufs_set_opt (*mount_options, ONERROR_REPAIR); | |
372 | break; | |
373 | default: | |
374 | printk("UFS-fs: Invalid option: \"%s\" " | |
375 | "or missing value\n", p); | |
376 | return 0; | |
377 | } | |
378 | } | |
379 | return 1; | |
380 | } | |
381 | ||
382 | /* | |
ee3ffd6c ED |
383 | * Diffrent types of UFS hold fs_cstotal in different |
384 | * places, and use diffrent data structure for it. | |
385 | * To make things simplier we just copy fs_cstotal to ufs_sb_private_info | |
1da177e4 | 386 | */ |
ee3ffd6c | 387 | static void ufs_setup_cstotal(struct super_block *sb) |
e295cfcb | 388 | { |
647b7e87 ED |
389 | struct ufs_sb_info *sbi = UFS_SB(sb); |
390 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
ee3ffd6c ED |
391 | struct ufs_super_block_first *usb1; |
392 | struct ufs_super_block_second *usb2; | |
647b7e87 | 393 | struct ufs_super_block_third *usb3; |
ee3ffd6c ED |
394 | unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; |
395 | ||
396 | UFSD("ENTER, mtype=%u\n", mtype); | |
397 | usb1 = ubh_get_usb_first(uspi); | |
398 | usb2 = ubh_get_usb_second(uspi); | |
399 | usb3 = ubh_get_usb_third(uspi); | |
400 | ||
401 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && | |
402 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || | |
403 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { | |
404 | /*we have statistic in different place, then usual*/ | |
405 | uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); | |
406 | uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); | |
407 | uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); | |
408 | uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); | |
409 | } else { | |
410 | uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); | |
411 | uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); | |
412 | uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); | |
413 | uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); | |
414 | } | |
415 | UFSD("EXIT\n"); | |
416 | } | |
417 | ||
418 | /* | |
419 | * Read on-disk structures associated with cylinder groups | |
420 | */ | |
421 | static int ufs_read_cylinder_structures(struct super_block *sb) | |
422 | { | |
423 | struct ufs_sb_info *sbi = UFS_SB(sb); | |
424 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
425 | unsigned flags = sbi->s_flags; | |
1da177e4 LT |
426 | struct ufs_buffer_head * ubh; |
427 | unsigned char * base, * space; | |
428 | unsigned size, blks, i; | |
ee3ffd6c ED |
429 | struct ufs_super_block_third *usb3; |
430 | ||
abf5d15f | 431 | UFSD("ENTER\n"); |
1da177e4 | 432 | |
ee3ffd6c | 433 | usb3 = ubh_get_usb_third(uspi); |
1da177e4 LT |
434 | /* |
435 | * Read cs structures from (usually) first data block | |
436 | * on the device. | |
437 | */ | |
438 | size = uspi->s_cssize; | |
439 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
440 | base = space = kmalloc(size, GFP_KERNEL); | |
441 | if (!base) | |
442 | goto failed; | |
e295cfcb | 443 | sbi->s_csp = (struct ufs_csum *)space; |
1da177e4 LT |
444 | for (i = 0; i < blks; i += uspi->s_fpb) { |
445 | size = uspi->s_bsize; | |
446 | if (i + uspi->s_fpb > blks) | |
447 | size = (blks - i) * uspi->s_fsize; | |
448 | ||
7b4ee73e | 449 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
1da177e4 | 450 | ubh = ubh_bread(sb, |
647b7e87 | 451 | fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size); |
7b4ee73e | 452 | else |
1da177e4 | 453 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
7b4ee73e E |
454 | |
455 | if (!ubh) | |
456 | goto failed; | |
457 | ||
458 | ubh_ubhcpymem (space, ubh, size); | |
7b4ee73e | 459 | |
1da177e4 LT |
460 | space += size; |
461 | ubh_brelse (ubh); | |
462 | ubh = NULL; | |
463 | } | |
464 | ||
465 | /* | |
466 | * Read cylinder group (we read only first fragment from block | |
467 | * at this time) and prepare internal data structures for cg caching. | |
468 | */ | |
469 | if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) | |
470 | goto failed; | |
471 | for (i = 0; i < uspi->s_ncg; i++) | |
472 | sbi->s_ucg[i] = NULL; | |
473 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { | |
474 | sbi->s_ucpi[i] = NULL; | |
475 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; | |
476 | } | |
477 | for (i = 0; i < uspi->s_ncg; i++) { | |
abf5d15f | 478 | UFSD("read cg %u\n", i); |
1da177e4 LT |
479 | if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) |
480 | goto failed; | |
481 | if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) | |
482 | goto failed; | |
647b7e87 | 483 | |
1da177e4 | 484 | ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); |
1da177e4 LT |
485 | } |
486 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { | |
487 | if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) | |
488 | goto failed; | |
489 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; | |
490 | } | |
491 | sbi->s_cg_loaded = 0; | |
abf5d15f | 492 | UFSD("EXIT\n"); |
1da177e4 LT |
493 | return 1; |
494 | ||
495 | failed: | |
f99d49ad | 496 | kfree (base); |
1da177e4 LT |
497 | if (sbi->s_ucg) { |
498 | for (i = 0; i < uspi->s_ncg; i++) | |
f99d49ad JJ |
499 | if (sbi->s_ucg[i]) |
500 | brelse (sbi->s_ucg[i]); | |
1da177e4 LT |
501 | kfree (sbi->s_ucg); |
502 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) | |
f99d49ad | 503 | kfree (sbi->s_ucpi[i]); |
1da177e4 | 504 | } |
abf5d15f | 505 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
506 | return 0; |
507 | } | |
508 | ||
509 | /* | |
ee3ffd6c | 510 | * Sync our internal copy of fs_cstotal with disk |
1da177e4 | 511 | */ |
ee3ffd6c | 512 | static void ufs_put_cstotal(struct super_block *sb) |
e295cfcb | 513 | { |
ee3ffd6c ED |
514 | unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
515 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
516 | struct ufs_super_block_first *usb1; | |
517 | struct ufs_super_block_second *usb2; | |
518 | struct ufs_super_block_third *usb3; | |
519 | ||
520 | UFSD("ENTER\n"); | |
521 | usb1 = ubh_get_usb_first(uspi); | |
522 | usb2 = ubh_get_usb_second(uspi); | |
523 | usb3 = ubh_get_usb_third(uspi); | |
524 | ||
525 | if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && | |
526 | (usb1->fs_flags & UFS_FLAGS_UPDATED)) || | |
527 | mtype == UFS_MOUNT_UFSTYPE_UFS2) { | |
528 | /*we have statistic in different place, then usual*/ | |
529 | usb2->fs_un.fs_u2.cs_ndir = | |
530 | cpu_to_fs64(sb, uspi->cs_total.cs_ndir); | |
531 | usb2->fs_un.fs_u2.cs_nbfree = | |
532 | cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); | |
533 | usb3->fs_un1.fs_u2.cs_nifree = | |
534 | cpu_to_fs64(sb, uspi->cs_total.cs_nifree); | |
535 | usb3->fs_un1.fs_u2.cs_nffree = | |
536 | cpu_to_fs64(sb, uspi->cs_total.cs_nffree); | |
537 | } else { | |
538 | usb1->fs_cstotal.cs_ndir = | |
539 | cpu_to_fs32(sb, uspi->cs_total.cs_ndir); | |
540 | usb1->fs_cstotal.cs_nbfree = | |
541 | cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); | |
542 | usb1->fs_cstotal.cs_nifree = | |
543 | cpu_to_fs32(sb, uspi->cs_total.cs_nifree); | |
544 | usb1->fs_cstotal.cs_nffree = | |
545 | cpu_to_fs32(sb, uspi->cs_total.cs_nffree); | |
546 | } | |
547 | ubh_mark_buffer_dirty(USPI_UBH(uspi)); | |
548 | UFSD("EXIT\n"); | |
549 | } | |
550 | ||
551 | /** | |
552 | * ufs_put_super_internal() - put on-disk intrenal structures | |
553 | * @sb: pointer to super_block structure | |
554 | * Put on-disk structures associated with cylinder groups | |
555 | * and write them back to disk, also update cs_total on disk | |
556 | */ | |
557 | static void ufs_put_super_internal(struct super_block *sb) | |
558 | { | |
559 | struct ufs_sb_info *sbi = UFS_SB(sb); | |
560 | struct ufs_sb_private_info *uspi = sbi->s_uspi; | |
1da177e4 LT |
561 | struct ufs_buffer_head * ubh; |
562 | unsigned char * base, * space; | |
563 | unsigned blks, size, i; | |
ee3ffd6c | 564 | |
1da177e4 | 565 | |
abf5d15f | 566 | UFSD("ENTER\n"); |
ee3ffd6c | 567 | ufs_put_cstotal(sb); |
1da177e4 LT |
568 | size = uspi->s_cssize; |
569 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
e295cfcb | 570 | base = space = (char*) sbi->s_csp; |
1da177e4 LT |
571 | for (i = 0; i < blks; i += uspi->s_fpb) { |
572 | size = uspi->s_bsize; | |
573 | if (i + uspi->s_fpb > blks) | |
574 | size = (blks - i) * uspi->s_fsize; | |
575 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); | |
576 | ubh_memcpyubh (ubh, space, size); | |
577 | space += size; | |
578 | ubh_mark_buffer_uptodate (ubh, 1); | |
579 | ubh_mark_buffer_dirty (ubh); | |
580 | ubh_brelse (ubh); | |
581 | } | |
582 | for (i = 0; i < sbi->s_cg_loaded; i++) { | |
583 | ufs_put_cylinder (sb, i); | |
584 | kfree (sbi->s_ucpi[i]); | |
585 | } | |
586 | for (; i < UFS_MAX_GROUP_LOADED; i++) | |
587 | kfree (sbi->s_ucpi[i]); | |
588 | for (i = 0; i < uspi->s_ncg; i++) | |
589 | brelse (sbi->s_ucg[i]); | |
590 | kfree (sbi->s_ucg); | |
591 | kfree (base); | |
abf5d15f | 592 | UFSD("EXIT\n"); |
1da177e4 LT |
593 | } |
594 | ||
595 | static int ufs_fill_super(struct super_block *sb, void *data, int silent) | |
596 | { | |
597 | struct ufs_sb_info * sbi; | |
598 | struct ufs_sb_private_info * uspi; | |
599 | struct ufs_super_block_first * usb1; | |
600 | struct ufs_super_block_second * usb2; | |
601 | struct ufs_super_block_third * usb3; | |
1da177e4 LT |
602 | struct ufs_buffer_head * ubh; |
603 | struct inode *inode; | |
604 | unsigned block_size, super_block_size; | |
605 | unsigned flags; | |
7b4ee73e | 606 | unsigned super_block_offset; |
1da177e4 LT |
607 | |
608 | uspi = NULL; | |
609 | ubh = NULL; | |
610 | flags = 0; | |
611 | ||
abf5d15f | 612 | UFSD("ENTER\n"); |
1da177e4 LT |
613 | |
614 | sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); | |
615 | if (!sbi) | |
616 | goto failed_nomem; | |
617 | sb->s_fs_info = sbi; | |
618 | memset(sbi, 0, sizeof(struct ufs_sb_info)); | |
619 | ||
abf5d15f | 620 | UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); |
1da177e4 LT |
621 | |
622 | #ifndef CONFIG_UFS_FS_WRITE | |
623 | if (!(sb->s_flags & MS_RDONLY)) { | |
624 | printk("ufs was compiled with read-only support, " | |
625 | "can't be mounted as read-write\n"); | |
626 | goto failed; | |
627 | } | |
628 | #endif | |
629 | /* | |
630 | * Set default mount options | |
631 | * Parse mount options | |
632 | */ | |
633 | sbi->s_mount_opt = 0; | |
634 | ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); | |
635 | if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { | |
636 | printk("wrong mount options\n"); | |
637 | goto failed; | |
638 | } | |
639 | if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { | |
640 | if (!silent) | |
641 | printk("You didn't specify the type of your ufs filesystem\n\n" | |
642 | "mount -t ufs -o ufstype=" | |
c690a722 | 643 | "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" |
1da177e4 LT |
644 | ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " |
645 | "default is ufstype=old\n"); | |
646 | ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); | |
647 | } | |
648 | ||
649 | sbi->s_uspi = uspi = | |
650 | kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); | |
651 | if (!uspi) | |
652 | goto failed; | |
653 | ||
7b4ee73e E |
654 | super_block_offset=UFS_SBLOCK; |
655 | ||
1da177e4 LT |
656 | /* Keep 2Gig file limit. Some UFS variants need to override |
657 | this but as I don't know which I'll let those in the know loosen | |
658 | the rules */ | |
1da177e4 LT |
659 | switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { |
660 | case UFS_MOUNT_UFSTYPE_44BSD: | |
abf5d15f | 661 | UFSD("ufstype=44bsd\n"); |
1da177e4 LT |
662 | uspi->s_fsize = block_size = 512; |
663 | uspi->s_fmask = ~(512 - 1); | |
664 | uspi->s_fshift = 9; | |
665 | uspi->s_sbsize = super_block_size = 1536; | |
666 | uspi->s_sbbase = 0; | |
667 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; | |
668 | break; | |
669 | case UFS_MOUNT_UFSTYPE_UFS2: | |
abf5d15f | 670 | UFSD("ufstype=ufs2\n"); |
7b4ee73e | 671 | super_block_offset=SBLOCK_UFS2; |
1da177e4 LT |
672 | uspi->s_fsize = block_size = 512; |
673 | uspi->s_fmask = ~(512 - 1); | |
674 | uspi->s_fshift = 9; | |
675 | uspi->s_sbsize = super_block_size = 1536; | |
676 | uspi->s_sbbase = 0; | |
677 | flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; | |
678 | if (!(sb->s_flags & MS_RDONLY)) { | |
679 | printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); | |
680 | sb->s_flags |= MS_RDONLY; | |
681 | } | |
682 | break; | |
683 | ||
684 | case UFS_MOUNT_UFSTYPE_SUN: | |
abf5d15f | 685 | UFSD("ufstype=sun\n"); |
1da177e4 LT |
686 | uspi->s_fsize = block_size = 1024; |
687 | uspi->s_fmask = ~(1024 - 1); | |
688 | uspi->s_fshift = 10; | |
689 | uspi->s_sbsize = super_block_size = 2048; | |
690 | uspi->s_sbbase = 0; | |
691 | uspi->s_maxsymlinklen = 56; | |
692 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; | |
693 | break; | |
694 | ||
695 | case UFS_MOUNT_UFSTYPE_SUNx86: | |
abf5d15f | 696 | UFSD("ufstype=sunx86\n"); |
1da177e4 LT |
697 | uspi->s_fsize = block_size = 1024; |
698 | uspi->s_fmask = ~(1024 - 1); | |
699 | uspi->s_fshift = 10; | |
700 | uspi->s_sbsize = super_block_size = 2048; | |
701 | uspi->s_sbbase = 0; | |
702 | uspi->s_maxsymlinklen = 56; | |
703 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; | |
704 | break; | |
705 | ||
706 | case UFS_MOUNT_UFSTYPE_OLD: | |
abf5d15f | 707 | UFSD("ufstype=old\n"); |
1da177e4 LT |
708 | uspi->s_fsize = block_size = 1024; |
709 | uspi->s_fmask = ~(1024 - 1); | |
710 | uspi->s_fshift = 10; | |
711 | uspi->s_sbsize = super_block_size = 2048; | |
712 | uspi->s_sbbase = 0; | |
713 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
714 | if (!(sb->s_flags & MS_RDONLY)) { | |
715 | if (!silent) | |
716 | printk(KERN_INFO "ufstype=old is supported read-only\n"); | |
717 | sb->s_flags |= MS_RDONLY; | |
718 | } | |
719 | break; | |
720 | ||
721 | case UFS_MOUNT_UFSTYPE_NEXTSTEP: | |
abf5d15f | 722 | UFSD("ufstype=nextstep\n"); |
1da177e4 LT |
723 | uspi->s_fsize = block_size = 1024; |
724 | uspi->s_fmask = ~(1024 - 1); | |
725 | uspi->s_fshift = 10; | |
726 | uspi->s_sbsize = super_block_size = 2048; | |
727 | uspi->s_sbbase = 0; | |
728 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
729 | if (!(sb->s_flags & MS_RDONLY)) { | |
730 | if (!silent) | |
731 | printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); | |
732 | sb->s_flags |= MS_RDONLY; | |
733 | } | |
734 | break; | |
735 | ||
736 | case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: | |
abf5d15f | 737 | UFSD("ufstype=nextstep-cd\n"); |
1da177e4 LT |
738 | uspi->s_fsize = block_size = 2048; |
739 | uspi->s_fmask = ~(2048 - 1); | |
740 | uspi->s_fshift = 11; | |
741 | uspi->s_sbsize = super_block_size = 2048; | |
742 | uspi->s_sbbase = 0; | |
743 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
744 | if (!(sb->s_flags & MS_RDONLY)) { | |
745 | if (!silent) | |
746 | printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); | |
747 | sb->s_flags |= MS_RDONLY; | |
748 | } | |
749 | break; | |
750 | ||
751 | case UFS_MOUNT_UFSTYPE_OPENSTEP: | |
abf5d15f | 752 | UFSD("ufstype=openstep\n"); |
1da177e4 LT |
753 | uspi->s_fsize = block_size = 1024; |
754 | uspi->s_fmask = ~(1024 - 1); | |
755 | uspi->s_fshift = 10; | |
756 | uspi->s_sbsize = super_block_size = 2048; | |
757 | uspi->s_sbbase = 0; | |
758 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; | |
759 | if (!(sb->s_flags & MS_RDONLY)) { | |
760 | if (!silent) | |
761 | printk(KERN_INFO "ufstype=openstep is supported read-only\n"); | |
762 | sb->s_flags |= MS_RDONLY; | |
763 | } | |
764 | break; | |
765 | ||
766 | case UFS_MOUNT_UFSTYPE_HP: | |
abf5d15f | 767 | UFSD("ufstype=hp\n"); |
1da177e4 LT |
768 | uspi->s_fsize = block_size = 1024; |
769 | uspi->s_fmask = ~(1024 - 1); | |
770 | uspi->s_fshift = 10; | |
771 | uspi->s_sbsize = super_block_size = 2048; | |
772 | uspi->s_sbbase = 0; | |
773 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; | |
774 | if (!(sb->s_flags & MS_RDONLY)) { | |
775 | if (!silent) | |
776 | printk(KERN_INFO "ufstype=hp is supported read-only\n"); | |
777 | sb->s_flags |= MS_RDONLY; | |
778 | } | |
779 | break; | |
780 | default: | |
781 | if (!silent) | |
782 | printk("unknown ufstype\n"); | |
783 | goto failed; | |
784 | } | |
785 | ||
786 | again: | |
787 | if (!sb_set_blocksize(sb, block_size)) { | |
788 | printk(KERN_ERR "UFS: failed to set blocksize\n"); | |
789 | goto failed; | |
790 | } | |
791 | ||
792 | /* | |
793 | * read ufs super block from device | |
794 | */ | |
7b4ee73e E |
795 | |
796 | ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); | |
797 | ||
1da177e4 LT |
798 | if (!ubh) |
799 | goto failed; | |
800 | ||
801 | ||
7b4ee73e E |
802 | usb1 = ubh_get_usb_first(uspi); |
803 | usb2 = ubh_get_usb_second(uspi); | |
804 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
805 | |
806 | /* | |
807 | * Check ufs magic number | |
808 | */ | |
809 | sbi->s_bytesex = BYTESEX_LE; | |
810 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { | |
811 | case UFS_MAGIC: | |
812 | case UFS2_MAGIC: | |
813 | case UFS_MAGIC_LFN: | |
814 | case UFS_MAGIC_FEA: | |
815 | case UFS_MAGIC_4GB: | |
816 | goto magic_found; | |
817 | } | |
818 | sbi->s_bytesex = BYTESEX_BE; | |
819 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { | |
820 | case UFS_MAGIC: | |
821 | case UFS2_MAGIC: | |
822 | case UFS_MAGIC_LFN: | |
823 | case UFS_MAGIC_FEA: | |
824 | case UFS_MAGIC_4GB: | |
825 | goto magic_found; | |
826 | } | |
827 | ||
828 | if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) | |
829 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) | |
830 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) | |
831 | && uspi->s_sbbase < 256) { | |
832 | ubh_brelse_uspi(uspi); | |
833 | ubh = NULL; | |
834 | uspi->s_sbbase += 8; | |
835 | goto again; | |
836 | } | |
837 | if (!silent) | |
838 | printk("ufs_read_super: bad magic number\n"); | |
839 | goto failed; | |
840 | ||
841 | magic_found: | |
842 | /* | |
843 | * Check block and fragment sizes | |
844 | */ | |
845 | uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); | |
846 | uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); | |
847 | uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); | |
848 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); | |
849 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); | |
850 | ||
851 | if (uspi->s_fsize & (uspi->s_fsize - 1)) { | |
852 | printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", | |
853 | uspi->s_fsize); | |
854 | goto failed; | |
855 | } | |
856 | if (uspi->s_fsize < 512) { | |
857 | printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", | |
858 | uspi->s_fsize); | |
859 | goto failed; | |
860 | } | |
861 | if (uspi->s_fsize > 4096) { | |
862 | printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", | |
863 | uspi->s_fsize); | |
864 | goto failed; | |
865 | } | |
866 | if (uspi->s_bsize & (uspi->s_bsize - 1)) { | |
867 | printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", | |
868 | uspi->s_bsize); | |
869 | goto failed; | |
870 | } | |
871 | if (uspi->s_bsize < 4096) { | |
872 | printk(KERN_ERR "ufs_read_super: block size %u is too small\n", | |
873 | uspi->s_bsize); | |
874 | goto failed; | |
875 | } | |
876 | if (uspi->s_bsize / uspi->s_fsize > 8) { | |
877 | printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", | |
878 | uspi->s_bsize / uspi->s_fsize); | |
879 | goto failed; | |
880 | } | |
881 | if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { | |
882 | ubh_brelse_uspi(uspi); | |
883 | ubh = NULL; | |
884 | block_size = uspi->s_fsize; | |
885 | super_block_size = uspi->s_sbsize; | |
abf5d15f | 886 | UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); |
1da177e4 LT |
887 | goto again; |
888 | } | |
889 | ||
647b7e87 ED |
890 | |
891 | ufs_print_super_stuff(sb, flags, usb1, usb2, usb3); | |
1da177e4 LT |
892 | |
893 | /* | |
894 | * Check, if file system was correctly unmounted. | |
895 | * If not, make it read only. | |
896 | */ | |
897 | if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || | |
898 | ((flags & UFS_ST_MASK) == UFS_ST_OLD) || | |
899 | (((flags & UFS_ST_MASK) == UFS_ST_SUN || | |
900 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && | |
901 | (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { | |
902 | switch(usb1->fs_clean) { | |
903 | case UFS_FSCLEAN: | |
abf5d15f | 904 | UFSD("fs is clean\n"); |
1da177e4 LT |
905 | break; |
906 | case UFS_FSSTABLE: | |
abf5d15f | 907 | UFSD("fs is stable\n"); |
1da177e4 LT |
908 | break; |
909 | case UFS_FSOSF1: | |
abf5d15f | 910 | UFSD("fs is DEC OSF/1\n"); |
1da177e4 LT |
911 | break; |
912 | case UFS_FSACTIVE: | |
913 | printk("ufs_read_super: fs is active\n"); | |
914 | sb->s_flags |= MS_RDONLY; | |
915 | break; | |
916 | case UFS_FSBAD: | |
917 | printk("ufs_read_super: fs is bad\n"); | |
918 | sb->s_flags |= MS_RDONLY; | |
919 | break; | |
920 | default: | |
921 | printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); | |
922 | sb->s_flags |= MS_RDONLY; | |
923 | break; | |
924 | } | |
ee3ffd6c | 925 | } else { |
1da177e4 LT |
926 | printk("ufs_read_super: fs needs fsck\n"); |
927 | sb->s_flags |= MS_RDONLY; | |
928 | } | |
929 | ||
930 | /* | |
931 | * Read ufs_super_block into internal data structures | |
932 | */ | |
933 | sb->s_op = &ufs_super_ops; | |
934 | sb->dq_op = NULL; /***/ | |
935 | sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); | |
936 | ||
937 | uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); | |
938 | uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); | |
939 | uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); | |
940 | uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); | |
941 | uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); | |
942 | uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); | |
943 | ||
944 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
647b7e87 ED |
945 | uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); |
946 | uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); | |
947 | } else { | |
1da177e4 LT |
948 | uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); |
949 | uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); | |
950 | } | |
951 | ||
952 | uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); | |
953 | /* s_bsize already set */ | |
954 | /* s_fsize already set */ | |
955 | uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); | |
956 | uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); | |
957 | uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); | |
958 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); | |
959 | uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); | |
960 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); | |
abf5d15f ED |
961 | UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, |
962 | uspi->s_fshift); | |
1da177e4 LT |
963 | uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); |
964 | uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); | |
965 | /* s_sbsize already set */ | |
966 | uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); | |
967 | uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); | |
968 | uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); | |
969 | uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); | |
970 | uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); | |
971 | uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); | |
972 | uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); | |
973 | uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); | |
974 | uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); | |
975 | uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); | |
976 | uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); | |
977 | uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); | |
978 | uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); | |
979 | uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); | |
980 | uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); | |
981 | uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); | |
647b7e87 ED |
982 | uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); |
983 | uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); | |
1da177e4 LT |
984 | uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); |
985 | uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); | |
986 | uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); | |
987 | uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); | |
988 | uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); | |
989 | uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); | |
990 | ||
991 | /* | |
992 | * Compute another frequently used values | |
993 | */ | |
994 | uspi->s_fpbmask = uspi->s_fpb - 1; | |
abf5d15f | 995 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
1da177e4 | 996 | uspi->s_apbshift = uspi->s_bshift - 3; |
abf5d15f | 997 | else |
1da177e4 | 998 | uspi->s_apbshift = uspi->s_bshift - 2; |
abf5d15f | 999 | |
1da177e4 LT |
1000 | uspi->s_2apbshift = uspi->s_apbshift * 2; |
1001 | uspi->s_3apbshift = uspi->s_apbshift * 3; | |
1002 | uspi->s_apb = 1 << uspi->s_apbshift; | |
1003 | uspi->s_2apb = 1 << uspi->s_2apbshift; | |
1004 | uspi->s_3apb = 1 << uspi->s_3apbshift; | |
1005 | uspi->s_apbmask = uspi->s_apb - 1; | |
1006 | uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; | |
1007 | uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; | |
1008 | uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; | |
1009 | uspi->s_bpf = uspi->s_fsize << 3; | |
1010 | uspi->s_bpfshift = uspi->s_fshift + 3; | |
1011 | uspi->s_bpfmask = uspi->s_bpf - 1; | |
1012 | if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == | |
1013 | UFS_MOUNT_UFSTYPE_44BSD) | |
1014 | uspi->s_maxsymlinklen = | |
647b7e87 | 1015 | fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); |
1da177e4 LT |
1016 | |
1017 | sbi->s_flags = flags; | |
1018 | ||
1019 | inode = iget(sb, UFS_ROOTINO); | |
1020 | if (!inode || is_bad_inode(inode)) | |
1021 | goto failed; | |
1022 | sb->s_root = d_alloc_root(inode); | |
1023 | if (!sb->s_root) | |
1024 | goto dalloc_failed; | |
1025 | ||
ee3ffd6c | 1026 | ufs_setup_cstotal(sb); |
1da177e4 LT |
1027 | /* |
1028 | * Read cylinder group structures | |
1029 | */ | |
1030 | if (!(sb->s_flags & MS_RDONLY)) | |
1031 | if (!ufs_read_cylinder_structures(sb)) | |
1032 | goto failed; | |
1033 | ||
abf5d15f | 1034 | UFSD("EXIT\n"); |
1da177e4 LT |
1035 | return 0; |
1036 | ||
1037 | dalloc_failed: | |
1038 | iput(inode); | |
1039 | failed: | |
f99d49ad JJ |
1040 | if (ubh) |
1041 | ubh_brelse_uspi (uspi); | |
1042 | kfree (uspi); | |
1043 | kfree(sbi); | |
1da177e4 | 1044 | sb->s_fs_info = NULL; |
abf5d15f | 1045 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
1046 | return -EINVAL; |
1047 | ||
1048 | failed_nomem: | |
abf5d15f | 1049 | UFSD("EXIT (NOMEM)\n"); |
1da177e4 LT |
1050 | return -ENOMEM; |
1051 | } | |
1052 | ||
647b7e87 ED |
1053 | static void ufs_write_super(struct super_block *sb) |
1054 | { | |
1da177e4 LT |
1055 | struct ufs_sb_private_info * uspi; |
1056 | struct ufs_super_block_first * usb1; | |
1057 | struct ufs_super_block_third * usb3; | |
1058 | unsigned flags; | |
1059 | ||
1060 | lock_kernel(); | |
1061 | ||
abf5d15f | 1062 | UFSD("ENTER\n"); |
1da177e4 LT |
1063 | flags = UFS_SB(sb)->s_flags; |
1064 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e E |
1065 | usb1 = ubh_get_usb_first(uspi); |
1066 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
1067 | |
1068 | if (!(sb->s_flags & MS_RDONLY)) { | |
1069 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); | |
1070 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN | |
1071 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) | |
1072 | ufs_set_fs_state(sb, usb1, usb3, | |
1073 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); | |
ee3ffd6c | 1074 | ufs_put_cstotal(sb); |
1da177e4 LT |
1075 | } |
1076 | sb->s_dirt = 0; | |
abf5d15f | 1077 | UFSD("EXIT\n"); |
1da177e4 LT |
1078 | unlock_kernel(); |
1079 | } | |
1080 | ||
abf5d15f | 1081 | static void ufs_put_super(struct super_block *sb) |
1da177e4 LT |
1082 | { |
1083 | struct ufs_sb_info * sbi = UFS_SB(sb); | |
1084 | ||
abf5d15f | 1085 | UFSD("ENTER\n"); |
1da177e4 LT |
1086 | |
1087 | if (!(sb->s_flags & MS_RDONLY)) | |
ee3ffd6c | 1088 | ufs_put_super_internal(sb); |
1da177e4 LT |
1089 | |
1090 | ubh_brelse_uspi (sbi->s_uspi); | |
1091 | kfree (sbi->s_uspi); | |
1092 | kfree (sbi); | |
1093 | sb->s_fs_info = NULL; | |
647b7e87 | 1094 | UFSD("EXIT\n"); |
1da177e4 LT |
1095 | return; |
1096 | } | |
1097 | ||
1098 | ||
1099 | static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) | |
1100 | { | |
1101 | struct ufs_sb_private_info * uspi; | |
1102 | struct ufs_super_block_first * usb1; | |
1103 | struct ufs_super_block_third * usb3; | |
1104 | unsigned new_mount_opt, ufstype; | |
1105 | unsigned flags; | |
1106 | ||
1107 | uspi = UFS_SB(sb)->s_uspi; | |
1108 | flags = UFS_SB(sb)->s_flags; | |
7b4ee73e E |
1109 | usb1 = ubh_get_usb_first(uspi); |
1110 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 LT |
1111 | |
1112 | /* | |
1113 | * Allow the "check" option to be passed as a remount option. | |
1114 | * It is not possible to change ufstype option during remount | |
1115 | */ | |
1116 | ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; | |
1117 | new_mount_opt = 0; | |
1118 | ufs_set_opt (new_mount_opt, ONERROR_LOCK); | |
1119 | if (!ufs_parse_options (data, &new_mount_opt)) | |
1120 | return -EINVAL; | |
1121 | if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { | |
1122 | new_mount_opt |= ufstype; | |
ee3ffd6c | 1123 | } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { |
1da177e4 LT |
1124 | printk("ufstype can't be changed during remount\n"); |
1125 | return -EINVAL; | |
1126 | } | |
1127 | ||
1128 | if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { | |
1129 | UFS_SB(sb)->s_mount_opt = new_mount_opt; | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * fs was mouted as rw, remounting ro | |
1135 | */ | |
1136 | if (*mount_flags & MS_RDONLY) { | |
ee3ffd6c | 1137 | ufs_put_super_internal(sb); |
1da177e4 LT |
1138 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
1139 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN | |
1140 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) | |
1141 | ufs_set_fs_state(sb, usb1, usb3, | |
1142 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); | |
9695ef16 | 1143 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
1da177e4 LT |
1144 | sb->s_dirt = 0; |
1145 | sb->s_flags |= MS_RDONLY; | |
ee3ffd6c | 1146 | } else { |
1da177e4 LT |
1147 | /* |
1148 | * fs was mounted as ro, remounting rw | |
1149 | */ | |
1da177e4 LT |
1150 | #ifndef CONFIG_UFS_FS_WRITE |
1151 | printk("ufs was compiled with read-only support, " | |
1152 | "can't be mounted as read-write\n"); | |
1153 | return -EINVAL; | |
1154 | #else | |
1155 | if (ufstype != UFS_MOUNT_UFSTYPE_SUN && | |
1156 | ufstype != UFS_MOUNT_UFSTYPE_44BSD && | |
1157 | ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { | |
1158 | printk("this ufstype is read-only supported\n"); | |
1159 | return -EINVAL; | |
1160 | } | |
ee3ffd6c | 1161 | if (!ufs_read_cylinder_structures(sb)) { |
1da177e4 LT |
1162 | printk("failed during remounting\n"); |
1163 | return -EPERM; | |
1164 | } | |
1165 | sb->s_flags &= ~MS_RDONLY; | |
1166 | #endif | |
1167 | } | |
1168 | UFS_SB(sb)->s_mount_opt = new_mount_opt; | |
1169 | return 0; | |
1170 | } | |
1171 | ||
647b7e87 | 1172 | static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1173 | { |
726c3342 | 1174 | struct super_block *sb = dentry->d_sb; |
647b7e87 ED |
1175 | struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; |
1176 | unsigned flags = UFS_SB(sb)->s_flags; | |
1177 | struct ufs_super_block_first *usb1; | |
1178 | struct ufs_super_block_second *usb2; | |
1179 | struct ufs_super_block_third *usb3; | |
1da177e4 LT |
1180 | |
1181 | lock_kernel(); | |
1182 | ||
647b7e87 ED |
1183 | usb1 = ubh_get_usb_first(uspi); |
1184 | usb2 = ubh_get_usb_second(uspi); | |
1185 | usb3 = ubh_get_usb_third(uspi); | |
1da177e4 | 1186 | |
1da177e4 LT |
1187 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
1188 | buf->f_type = UFS2_MAGIC; | |
647b7e87 | 1189 | buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); |
647b7e87 | 1190 | } else { |
1da177e4 LT |
1191 | buf->f_type = UFS_MAGIC; |
1192 | buf->f_blocks = uspi->s_dsize; | |
1da177e4 | 1193 | } |
ee3ffd6c ED |
1194 | buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + |
1195 | uspi->cs_total.cs_nffree; | |
1196 | buf->f_ffree = uspi->cs_total.cs_nifree; | |
1da177e4 LT |
1197 | buf->f_bsize = sb->s_blocksize; |
1198 | buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) | |
1199 | ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; | |
1200 | buf->f_files = uspi->s_ncg * uspi->s_ipg; | |
1201 | buf->f_namelen = UFS_MAXNAMLEN; | |
1202 | ||
1203 | unlock_kernel(); | |
1204 | ||
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | static kmem_cache_t * ufs_inode_cachep; | |
1209 | ||
1210 | static struct inode *ufs_alloc_inode(struct super_block *sb) | |
1211 | { | |
1212 | struct ufs_inode_info *ei; | |
1213 | ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); | |
1214 | if (!ei) | |
1215 | return NULL; | |
1216 | ei->vfs_inode.i_version = 1; | |
1217 | return &ei->vfs_inode; | |
1218 | } | |
1219 | ||
1220 | static void ufs_destroy_inode(struct inode *inode) | |
1221 | { | |
1222 | kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); | |
1223 | } | |
1224 | ||
1225 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
1226 | { | |
1227 | struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; | |
1228 | ||
1229 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
1230 | SLAB_CTOR_CONSTRUCTOR) | |
1231 | inode_init_once(&ei->vfs_inode); | |
1232 | } | |
1233 | ||
1234 | static int init_inodecache(void) | |
1235 | { | |
1236 | ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", | |
1237 | sizeof(struct ufs_inode_info), | |
fffb60f9 PJ |
1238 | 0, (SLAB_RECLAIM_ACCOUNT| |
1239 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
1240 | init_once, NULL); |
1241 | if (ufs_inode_cachep == NULL) | |
1242 | return -ENOMEM; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static void destroy_inodecache(void) | |
1247 | { | |
1248 | if (kmem_cache_destroy(ufs_inode_cachep)) | |
1249 | printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); | |
1250 | } | |
1251 | ||
1252 | #ifdef CONFIG_QUOTA | |
1253 | static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); | |
1254 | static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); | |
1255 | #endif | |
1256 | ||
1257 | static struct super_operations ufs_super_ops = { | |
1258 | .alloc_inode = ufs_alloc_inode, | |
1259 | .destroy_inode = ufs_destroy_inode, | |
1260 | .read_inode = ufs_read_inode, | |
1261 | .write_inode = ufs_write_inode, | |
1262 | .delete_inode = ufs_delete_inode, | |
1263 | .put_super = ufs_put_super, | |
1264 | .write_super = ufs_write_super, | |
1265 | .statfs = ufs_statfs, | |
1266 | .remount_fs = ufs_remount, | |
1267 | #ifdef CONFIG_QUOTA | |
1268 | .quota_read = ufs_quota_read, | |
1269 | .quota_write = ufs_quota_write, | |
1270 | #endif | |
1271 | }; | |
1272 | ||
1273 | #ifdef CONFIG_QUOTA | |
1274 | ||
1275 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
1276 | * acquiring the locks... As quota files are never truncated and quota code | |
1277 | * itself serializes the operations (and noone else should touch the files) | |
1278 | * we don't have to be afraid of races */ | |
1279 | static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, | |
1280 | size_t len, loff_t off) | |
1281 | { | |
1282 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
1283 | sector_t blk = off >> sb->s_blocksize_bits; | |
1284 | int err = 0; | |
1285 | int offset = off & (sb->s_blocksize - 1); | |
1286 | int tocopy; | |
1287 | size_t toread; | |
1288 | struct buffer_head *bh; | |
1289 | loff_t i_size = i_size_read(inode); | |
1290 | ||
1291 | if (off > i_size) | |
1292 | return 0; | |
1293 | if (off+len > i_size) | |
1294 | len = i_size-off; | |
1295 | toread = len; | |
1296 | while (toread > 0) { | |
1297 | tocopy = sb->s_blocksize - offset < toread ? | |
1298 | sb->s_blocksize - offset : toread; | |
1299 | ||
1300 | bh = ufs_bread(inode, blk, 0, &err); | |
1301 | if (err) | |
1302 | return err; | |
1303 | if (!bh) /* A hole? */ | |
1304 | memset(data, 0, tocopy); | |
1305 | else { | |
1306 | memcpy(data, bh->b_data+offset, tocopy); | |
1307 | brelse(bh); | |
1308 | } | |
1309 | offset = 0; | |
1310 | toread -= tocopy; | |
1311 | data += tocopy; | |
1312 | blk++; | |
1313 | } | |
1314 | return len; | |
1315 | } | |
1316 | ||
1317 | /* Write to quotafile */ | |
1318 | static ssize_t ufs_quota_write(struct super_block *sb, int type, | |
1319 | const char *data, size_t len, loff_t off) | |
1320 | { | |
1321 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
1322 | sector_t blk = off >> sb->s_blocksize_bits; | |
1323 | int err = 0; | |
1324 | int offset = off & (sb->s_blocksize - 1); | |
1325 | int tocopy; | |
1326 | size_t towrite = len; | |
1327 | struct buffer_head *bh; | |
1328 | ||
5c81a419 | 1329 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1da177e4 LT |
1330 | while (towrite > 0) { |
1331 | tocopy = sb->s_blocksize - offset < towrite ? | |
1332 | sb->s_blocksize - offset : towrite; | |
1333 | ||
1334 | bh = ufs_bread(inode, blk, 1, &err); | |
1335 | if (!bh) | |
1336 | goto out; | |
1337 | lock_buffer(bh); | |
1338 | memcpy(bh->b_data+offset, data, tocopy); | |
1339 | flush_dcache_page(bh->b_page); | |
1340 | set_buffer_uptodate(bh); | |
1341 | mark_buffer_dirty(bh); | |
1342 | unlock_buffer(bh); | |
1343 | brelse(bh); | |
1344 | offset = 0; | |
1345 | towrite -= tocopy; | |
1346 | data += tocopy; | |
1347 | blk++; | |
1348 | } | |
1349 | out: | |
15b2fe39 | 1350 | if (len == towrite) { |
1b1dcc1b | 1351 | mutex_unlock(&inode->i_mutex); |
1da177e4 | 1352 | return err; |
15b2fe39 | 1353 | } |
1da177e4 LT |
1354 | if (inode->i_size < off+len-towrite) |
1355 | i_size_write(inode, off+len-towrite); | |
1356 | inode->i_version++; | |
1357 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
1358 | mark_inode_dirty(inode); | |
1b1dcc1b | 1359 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
1360 | return len - towrite; |
1361 | } | |
1362 | ||
1363 | #endif | |
1364 | ||
454e2398 DH |
1365 | static int ufs_get_sb(struct file_system_type *fs_type, |
1366 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1367 | { |
454e2398 | 1368 | return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | static struct file_system_type ufs_fs_type = { | |
1372 | .owner = THIS_MODULE, | |
1373 | .name = "ufs", | |
1374 | .get_sb = ufs_get_sb, | |
1375 | .kill_sb = kill_block_super, | |
1376 | .fs_flags = FS_REQUIRES_DEV, | |
1377 | }; | |
1378 | ||
1379 | static int __init init_ufs_fs(void) | |
1380 | { | |
1381 | int err = init_inodecache(); | |
1382 | if (err) | |
1383 | goto out1; | |
1384 | err = register_filesystem(&ufs_fs_type); | |
1385 | if (err) | |
1386 | goto out; | |
1387 | return 0; | |
1388 | out: | |
1389 | destroy_inodecache(); | |
1390 | out1: | |
1391 | return err; | |
1392 | } | |
1393 | ||
1394 | static void __exit exit_ufs_fs(void) | |
1395 | { | |
1396 | unregister_filesystem(&ufs_fs_type); | |
1397 | destroy_inodecache(); | |
1398 | } | |
1399 | ||
1400 | module_init(init_ufs_fs) | |
1401 | module_exit(exit_ufs_fs) | |
1402 | MODULE_LICENSE("GPL"); |