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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/ufs/balloc.c | |
3 | * | |
4 | * Copyright (C) 1998 | |
5 | * Daniel Pirkl <daniel.pirkl@email.cz> | |
6 | * Charles University, Faculty of Mathematics and Physics | |
54fb996a ED |
7 | * |
8 | * UFS2 write support Evgeniy Dushistov <dushistov@mail.ru>, 2007 | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/fs.h> | |
12 | #include <linux/ufs_fs.h> | |
13 | #include <linux/stat.h> | |
14 | #include <linux/time.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/quotaops.h> | |
17 | #include <linux/buffer_head.h> | |
16f7e0fe | 18 | #include <linux/capability.h> |
1da177e4 LT |
19 | #include <linux/bitops.h> |
20 | #include <asm/byteorder.h> | |
21 | ||
22 | #include "swab.h" | |
23 | #include "util.h" | |
24 | ||
54fb996a ED |
25 | #define INVBLOCK ((u64)-1L) |
26 | ||
27 | static u64 ufs_add_fragments(struct inode *, u64, unsigned, unsigned, int *); | |
28 | static u64 ufs_alloc_fragments(struct inode *, unsigned, u64, unsigned, int *); | |
29 | static u64 ufs_alloccg_block(struct inode *, struct ufs_cg_private_info *, u64, int *); | |
30 | static u64 ufs_bitmap_search (struct super_block *, struct ufs_cg_private_info *, u64, unsigned); | |
1da177e4 LT |
31 | static unsigned char ufs_fragtable_8fpb[], ufs_fragtable_other[]; |
32 | static void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, unsigned, int); | |
33 | ||
34 | /* | |
35 | * Free 'count' fragments from fragment number 'fragment' | |
36 | */ | |
54fb996a | 37 | void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count) |
6ef4d6bf | 38 | { |
1da177e4 LT |
39 | struct super_block * sb; |
40 | struct ufs_sb_private_info * uspi; | |
41 | struct ufs_super_block_first * usb1; | |
42 | struct ufs_cg_private_info * ucpi; | |
43 | struct ufs_cylinder_group * ucg; | |
54fb996a ED |
44 | unsigned cgno, bit, end_bit, bbase, blkmap, i; |
45 | u64 blkno; | |
1da177e4 LT |
46 | |
47 | sb = inode->i_sb; | |
48 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 49 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 | 50 | |
54fb996a ED |
51 | UFSD("ENTER, fragment %llu, count %u\n", |
52 | (unsigned long long)fragment, count); | |
1da177e4 LT |
53 | |
54 | if (ufs_fragnum(fragment) + count > uspi->s_fpg) | |
55 | ufs_error (sb, "ufs_free_fragments", "internal error"); | |
56 | ||
57 | lock_super(sb); | |
58 | ||
54fb996a ED |
59 | cgno = ufs_dtog(uspi, fragment); |
60 | bit = ufs_dtogd(uspi, fragment); | |
1da177e4 LT |
61 | if (cgno >= uspi->s_ncg) { |
62 | ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device"); | |
63 | goto failed; | |
64 | } | |
65 | ||
66 | ucpi = ufs_load_cylinder (sb, cgno); | |
67 | if (!ucpi) | |
68 | goto failed; | |
9695ef16 | 69 | ucg = ubh_get_ucg (UCPI_UBH(ucpi)); |
1da177e4 LT |
70 | if (!ufs_cg_chkmagic(sb, ucg)) { |
71 | ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno); | |
72 | goto failed; | |
73 | } | |
74 | ||
75 | end_bit = bit + count; | |
76 | bbase = ufs_blknum (bit); | |
9695ef16 | 77 | blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase); |
1da177e4 LT |
78 | ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1); |
79 | for (i = bit; i < end_bit; i++) { | |
9695ef16 ED |
80 | if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i)) |
81 | ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i); | |
7b4ee73e E |
82 | else |
83 | ufs_error (sb, "ufs_free_fragments", | |
84 | "bit already cleared for fragment %u", i); | |
1da177e4 LT |
85 | } |
86 | ||
87 | DQUOT_FREE_BLOCK (inode, count); | |
88 | ||
89 | ||
90 | fs32_add(sb, &ucg->cg_cs.cs_nffree, count); | |
ee3ffd6c | 91 | uspi->cs_total.cs_nffree += count; |
1da177e4 | 92 | fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); |
9695ef16 | 93 | blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase); |
1da177e4 LT |
94 | ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1); |
95 | ||
96 | /* | |
97 | * Trying to reassemble free fragments into block | |
98 | */ | |
99 | blkno = ufs_fragstoblks (bbase); | |
9695ef16 | 100 | if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) { |
1da177e4 | 101 | fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb); |
ee3ffd6c | 102 | uspi->cs_total.cs_nffree -= uspi->s_fpb; |
1da177e4 LT |
103 | fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb); |
104 | if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) | |
105 | ufs_clusteracct (sb, ucpi, blkno, 1); | |
106 | fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); | |
ee3ffd6c | 107 | uspi->cs_total.cs_nbfree++; |
1da177e4 | 108 | fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); |
54fb996a ED |
109 | if (uspi->fs_magic != UFS2_MAGIC) { |
110 | unsigned cylno = ufs_cbtocylno (bbase); | |
111 | ||
112 | fs16_add(sb, &ubh_cg_blks(ucpi, cylno, | |
113 | ufs_cbtorpos(bbase)), 1); | |
114 | fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); | |
115 | } | |
1da177e4 LT |
116 | } |
117 | ||
9695ef16 ED |
118 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
119 | ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); | |
1da177e4 | 120 | if (sb->s_flags & MS_SYNCHRONOUS) { |
098d5af7 | 121 | ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); |
9695ef16 | 122 | ubh_wait_on_buffer (UCPI_UBH(ucpi)); |
1da177e4 LT |
123 | } |
124 | sb->s_dirt = 1; | |
125 | ||
126 | unlock_super (sb); | |
abf5d15f | 127 | UFSD("EXIT\n"); |
1da177e4 LT |
128 | return; |
129 | ||
130 | failed: | |
131 | unlock_super (sb); | |
abf5d15f | 132 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
133 | return; |
134 | } | |
135 | ||
136 | /* | |
137 | * Free 'count' fragments from fragment number 'fragment' (free whole blocks) | |
138 | */ | |
54fb996a | 139 | void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count) |
6ef4d6bf | 140 | { |
1da177e4 LT |
141 | struct super_block * sb; |
142 | struct ufs_sb_private_info * uspi; | |
143 | struct ufs_super_block_first * usb1; | |
144 | struct ufs_cg_private_info * ucpi; | |
145 | struct ufs_cylinder_group * ucg; | |
54fb996a ED |
146 | unsigned overflow, cgno, bit, end_bit, i; |
147 | u64 blkno; | |
1da177e4 LT |
148 | |
149 | sb = inode->i_sb; | |
150 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 151 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 | 152 | |
54fb996a ED |
153 | UFSD("ENTER, fragment %llu, count %u\n", |
154 | (unsigned long long)fragment, count); | |
1da177e4 LT |
155 | |
156 | if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) { | |
157 | ufs_error (sb, "ufs_free_blocks", "internal error, " | |
54fb996a ED |
158 | "fragment %llu, count %u\n", |
159 | (unsigned long long)fragment, count); | |
1da177e4 LT |
160 | goto failed; |
161 | } | |
162 | ||
163 | lock_super(sb); | |
164 | ||
165 | do_more: | |
166 | overflow = 0; | |
54fb996a ED |
167 | cgno = ufs_dtog(uspi, fragment); |
168 | bit = ufs_dtogd(uspi, fragment); | |
1da177e4 LT |
169 | if (cgno >= uspi->s_ncg) { |
170 | ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device"); | |
2e006393 | 171 | goto failed_unlock; |
1da177e4 LT |
172 | } |
173 | end_bit = bit + count; | |
174 | if (end_bit > uspi->s_fpg) { | |
175 | overflow = bit + count - uspi->s_fpg; | |
176 | count -= overflow; | |
177 | end_bit -= overflow; | |
178 | } | |
179 | ||
180 | ucpi = ufs_load_cylinder (sb, cgno); | |
181 | if (!ucpi) | |
2e006393 | 182 | goto failed_unlock; |
9695ef16 | 183 | ucg = ubh_get_ucg (UCPI_UBH(ucpi)); |
1da177e4 LT |
184 | if (!ufs_cg_chkmagic(sb, ucg)) { |
185 | ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno); | |
2e006393 | 186 | goto failed_unlock; |
1da177e4 LT |
187 | } |
188 | ||
189 | for (i = bit; i < end_bit; i += uspi->s_fpb) { | |
190 | blkno = ufs_fragstoblks(i); | |
9695ef16 | 191 | if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) { |
1da177e4 LT |
192 | ufs_error(sb, "ufs_free_blocks", "freeing free fragment"); |
193 | } | |
9695ef16 | 194 | ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno); |
1da177e4 LT |
195 | if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) |
196 | ufs_clusteracct (sb, ucpi, blkno, 1); | |
197 | DQUOT_FREE_BLOCK(inode, uspi->s_fpb); | |
198 | ||
199 | fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); | |
ee3ffd6c | 200 | uspi->cs_total.cs_nbfree++; |
1da177e4 | 201 | fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); |
54fb996a ED |
202 | |
203 | if (uspi->fs_magic != UFS2_MAGIC) { | |
204 | unsigned cylno = ufs_cbtocylno(i); | |
205 | ||
206 | fs16_add(sb, &ubh_cg_blks(ucpi, cylno, | |
207 | ufs_cbtorpos(i)), 1); | |
208 | fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); | |
209 | } | |
1da177e4 LT |
210 | } |
211 | ||
9695ef16 ED |
212 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
213 | ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); | |
1da177e4 | 214 | if (sb->s_flags & MS_SYNCHRONOUS) { |
098d5af7 | 215 | ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); |
9695ef16 | 216 | ubh_wait_on_buffer (UCPI_UBH(ucpi)); |
1da177e4 LT |
217 | } |
218 | ||
219 | if (overflow) { | |
220 | fragment += count; | |
221 | count = overflow; | |
222 | goto do_more; | |
223 | } | |
224 | ||
225 | sb->s_dirt = 1; | |
226 | unlock_super (sb); | |
abf5d15f | 227 | UFSD("EXIT\n"); |
1da177e4 LT |
228 | return; |
229 | ||
2e006393 | 230 | failed_unlock: |
1da177e4 | 231 | unlock_super (sb); |
2e006393 | 232 | failed: |
abf5d15f | 233 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
234 | return; |
235 | } | |
236 | ||
6ef4d6bf ED |
237 | /* |
238 | * Modify inode page cache in such way: | |
239 | * have - blocks with b_blocknr equal to oldb...oldb+count-1 | |
240 | * get - blocks with b_blocknr equal to newb...newb+count-1 | |
241 | * also we suppose that oldb...oldb+count-1 blocks | |
242 | * situated at the end of file. | |
243 | * | |
244 | * We can come here from ufs_writepage or ufs_prepare_write, | |
245 | * locked_page is argument of these functions, so we already lock it. | |
246 | */ | |
efee2b81 | 247 | static void ufs_change_blocknr(struct inode *inode, unsigned int beg, |
f3914758 ED |
248 | unsigned int count, unsigned int oldb, |
249 | unsigned int newb, struct page *locked_page) | |
6ef4d6bf | 250 | { |
efee2b81 ED |
251 | const unsigned mask = (1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1; |
252 | struct address_space * const mapping = inode->i_mapping; | |
a685e26f | 253 | pgoff_t index, cur_index; |
efee2b81 | 254 | unsigned end, pos, j; |
6ef4d6bf ED |
255 | struct page *page; |
256 | struct buffer_head *head, *bh; | |
257 | ||
abf5d15f ED |
258 | UFSD("ENTER, ino %lu, count %u, oldb %u, newb %u\n", |
259 | inode->i_ino, count, oldb, newb); | |
6ef4d6bf | 260 | |
a685e26f | 261 | BUG_ON(!locked_page); |
6ef4d6bf ED |
262 | BUG_ON(!PageLocked(locked_page)); |
263 | ||
a685e26f ED |
264 | cur_index = locked_page->index; |
265 | ||
efee2b81 ED |
266 | for (end = count + beg; beg < end; beg = (beg | mask) + 1) { |
267 | index = beg >> (PAGE_CACHE_SHIFT - inode->i_blkbits); | |
6ef4d6bf ED |
268 | |
269 | if (likely(cur_index != index)) { | |
270 | page = ufs_get_locked_page(mapping, index); | |
06fa45d3 | 271 | if (!page || IS_ERR(page)) /* it was truncated or EIO */ |
6ef4d6bf ED |
272 | continue; |
273 | } else | |
274 | page = locked_page; | |
275 | ||
6ef4d6bf ED |
276 | head = page_buffers(page); |
277 | bh = head; | |
efee2b81 ED |
278 | pos = beg & mask; |
279 | for (j = 0; j < pos; ++j) | |
280 | bh = bh->b_this_page; | |
281 | j = 0; | |
6ef4d6bf | 282 | do { |
efee2b81 ED |
283 | if (buffer_mapped(bh)) { |
284 | pos = bh->b_blocknr - oldb; | |
285 | if (pos < count) { | |
286 | UFSD(" change from %llu to %llu\n", | |
287 | (unsigned long long)pos + oldb, | |
288 | (unsigned long long)pos + newb); | |
289 | bh->b_blocknr = newb + pos; | |
290 | unmap_underlying_metadata(bh->b_bdev, | |
291 | bh->b_blocknr); | |
292 | mark_buffer_dirty(bh); | |
293 | ++j; | |
294 | } | |
6ef4d6bf ED |
295 | } |
296 | ||
297 | bh = bh->b_this_page; | |
298 | } while (bh != head); | |
299 | ||
efee2b81 ED |
300 | if (j) |
301 | set_page_dirty(page); | |
6ef4d6bf | 302 | |
10e5dce0 ED |
303 | if (likely(cur_index != index)) |
304 | ufs_put_locked_page(page); | |
6ef4d6bf | 305 | } |
abf5d15f | 306 | UFSD("EXIT\n"); |
6ef4d6bf ED |
307 | } |
308 | ||
d63b7090 ED |
309 | static void ufs_clear_frags(struct inode *inode, sector_t beg, unsigned int n, |
310 | int sync) | |
311 | { | |
312 | struct buffer_head *bh; | |
313 | sector_t end = beg + n; | |
314 | ||
315 | for (; beg < end; ++beg) { | |
316 | bh = sb_getblk(inode->i_sb, beg); | |
317 | lock_buffer(bh); | |
318 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
319 | set_buffer_uptodate(bh); | |
320 | mark_buffer_dirty(bh); | |
321 | unlock_buffer(bh); | |
322 | if (IS_SYNC(inode) || sync) | |
323 | sync_dirty_buffer(bh); | |
324 | brelse(bh); | |
325 | } | |
326 | } | |
327 | ||
54fb996a ED |
328 | u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment, |
329 | u64 goal, unsigned count, int *err, | |
330 | struct page *locked_page) | |
1da177e4 LT |
331 | { |
332 | struct super_block * sb; | |
333 | struct ufs_sb_private_info * uspi; | |
334 | struct ufs_super_block_first * usb1; | |
54fb996a ED |
335 | unsigned cgno, oldcount, newcount; |
336 | u64 tmp, request, result; | |
1da177e4 | 337 | |
54fb996a ED |
338 | UFSD("ENTER, ino %lu, fragment %llu, goal %llu, count %u\n", |
339 | inode->i_ino, (unsigned long long)fragment, | |
340 | (unsigned long long)goal, count); | |
1da177e4 LT |
341 | |
342 | sb = inode->i_sb; | |
343 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 344 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
345 | *err = -ENOSPC; |
346 | ||
347 | lock_super (sb); | |
54fb996a ED |
348 | tmp = ufs_data_ptr_to_cpu(sb, p); |
349 | ||
1da177e4 | 350 | if (count + ufs_fragnum(fragment) > uspi->s_fpb) { |
54fb996a ED |
351 | ufs_warning(sb, "ufs_new_fragments", "internal warning" |
352 | " fragment %llu, count %u", | |
353 | (unsigned long long)fragment, count); | |
1da177e4 LT |
354 | count = uspi->s_fpb - ufs_fragnum(fragment); |
355 | } | |
356 | oldcount = ufs_fragnum (fragment); | |
357 | newcount = oldcount + count; | |
358 | ||
359 | /* | |
360 | * Somebody else has just allocated our fragments | |
361 | */ | |
362 | if (oldcount) { | |
363 | if (!tmp) { | |
54fb996a ED |
364 | ufs_error(sb, "ufs_new_fragments", "internal error, " |
365 | "fragment %llu, tmp %llu\n", | |
366 | (unsigned long long)fragment, | |
367 | (unsigned long long)tmp); | |
368 | unlock_super(sb); | |
369 | return INVBLOCK; | |
1da177e4 LT |
370 | } |
371 | if (fragment < UFS_I(inode)->i_lastfrag) { | |
abf5d15f | 372 | UFSD("EXIT (ALREADY ALLOCATED)\n"); |
1da177e4 LT |
373 | unlock_super (sb); |
374 | return 0; | |
375 | } | |
376 | } | |
377 | else { | |
378 | if (tmp) { | |
abf5d15f | 379 | UFSD("EXIT (ALREADY ALLOCATED)\n"); |
1da177e4 LT |
380 | unlock_super(sb); |
381 | return 0; | |
382 | } | |
383 | } | |
384 | ||
385 | /* | |
386 | * There is not enough space for user on the device | |
387 | */ | |
ee3ffd6c | 388 | if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) { |
1da177e4 | 389 | unlock_super (sb); |
abf5d15f | 390 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
391 | return 0; |
392 | } | |
393 | ||
394 | if (goal >= uspi->s_size) | |
395 | goal = 0; | |
396 | if (goal == 0) | |
397 | cgno = ufs_inotocg (inode->i_ino); | |
398 | else | |
54fb996a | 399 | cgno = ufs_dtog(uspi, goal); |
1da177e4 LT |
400 | |
401 | /* | |
402 | * allocate new fragment | |
403 | */ | |
404 | if (oldcount == 0) { | |
405 | result = ufs_alloc_fragments (inode, cgno, goal, count, err); | |
406 | if (result) { | |
54fb996a | 407 | ufs_cpu_to_data_ptr(sb, p, result); |
1da177e4 | 408 | *err = 0; |
54fb996a ED |
409 | UFS_I(inode)->i_lastfrag = |
410 | max_t(u32, UFS_I(inode)->i_lastfrag, | |
411 | fragment + count); | |
412 | ufs_clear_frags(inode, result + oldcount, | |
413 | newcount - oldcount, locked_page != NULL); | |
1da177e4 LT |
414 | } |
415 | unlock_super(sb); | |
54fb996a | 416 | UFSD("EXIT, result %llu\n", (unsigned long long)result); |
1da177e4 LT |
417 | return result; |
418 | } | |
419 | ||
420 | /* | |
421 | * resize block | |
422 | */ | |
423 | result = ufs_add_fragments (inode, tmp, oldcount, newcount, err); | |
424 | if (result) { | |
425 | *err = 0; | |
1da177e4 | 426 | UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); |
d63b7090 ED |
427 | ufs_clear_frags(inode, result + oldcount, newcount - oldcount, |
428 | locked_page != NULL); | |
1da177e4 | 429 | unlock_super(sb); |
54fb996a | 430 | UFSD("EXIT, result %llu\n", (unsigned long long)result); |
1da177e4 LT |
431 | return result; |
432 | } | |
433 | ||
434 | /* | |
435 | * allocate new block and move data | |
436 | */ | |
437 | switch (fs32_to_cpu(sb, usb1->fs_optim)) { | |
438 | case UFS_OPTSPACE: | |
439 | request = newcount; | |
ee3ffd6c ED |
440 | if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree |
441 | > uspi->s_dsize * uspi->s_minfree / (2 * 100)) | |
1da177e4 LT |
442 | break; |
443 | usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); | |
444 | break; | |
445 | default: | |
446 | usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); | |
447 | ||
448 | case UFS_OPTTIME: | |
449 | request = uspi->s_fpb; | |
ee3ffd6c | 450 | if (uspi->cs_total.cs_nffree < uspi->s_dsize * |
1da177e4 LT |
451 | (uspi->s_minfree - 2) / 100) |
452 | break; | |
453 | usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); | |
454 | break; | |
455 | } | |
456 | result = ufs_alloc_fragments (inode, cgno, goal, request, err); | |
457 | if (result) { | |
efee2b81 ED |
458 | ufs_clear_frags(inode, result + oldcount, newcount - oldcount, |
459 | locked_page != NULL); | |
f3914758 ED |
460 | ufs_change_blocknr(inode, fragment - oldcount, oldcount, tmp, |
461 | result, locked_page); | |
54fb996a | 462 | ufs_cpu_to_data_ptr(sb, p, result); |
1da177e4 | 463 | *err = 0; |
1da177e4 | 464 | UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); |
1da177e4 LT |
465 | unlock_super(sb); |
466 | if (newcount < request) | |
467 | ufs_free_fragments (inode, result + newcount, request - newcount); | |
468 | ufs_free_fragments (inode, tmp, oldcount); | |
54fb996a | 469 | UFSD("EXIT, result %llu\n", (unsigned long long)result); |
1da177e4 LT |
470 | return result; |
471 | } | |
472 | ||
473 | unlock_super(sb); | |
abf5d15f | 474 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
475 | return 0; |
476 | } | |
477 | ||
54fb996a ED |
478 | static u64 ufs_add_fragments(struct inode *inode, u64 fragment, |
479 | unsigned oldcount, unsigned newcount, int *err) | |
1da177e4 LT |
480 | { |
481 | struct super_block * sb; | |
482 | struct ufs_sb_private_info * uspi; | |
483 | struct ufs_super_block_first * usb1; | |
484 | struct ufs_cg_private_info * ucpi; | |
485 | struct ufs_cylinder_group * ucg; | |
486 | unsigned cgno, fragno, fragoff, count, fragsize, i; | |
487 | ||
54fb996a ED |
488 | UFSD("ENTER, fragment %llu, oldcount %u, newcount %u\n", |
489 | (unsigned long long)fragment, oldcount, newcount); | |
1da177e4 LT |
490 | |
491 | sb = inode->i_sb; | |
492 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 493 | usb1 = ubh_get_usb_first (uspi); |
1da177e4 LT |
494 | count = newcount - oldcount; |
495 | ||
54fb996a | 496 | cgno = ufs_dtog(uspi, fragment); |
1da177e4 LT |
497 | if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count) |
498 | return 0; | |
499 | if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb) | |
500 | return 0; | |
501 | ucpi = ufs_load_cylinder (sb, cgno); | |
502 | if (!ucpi) | |
503 | return 0; | |
9695ef16 | 504 | ucg = ubh_get_ucg (UCPI_UBH(ucpi)); |
1da177e4 LT |
505 | if (!ufs_cg_chkmagic(sb, ucg)) { |
506 | ufs_panic (sb, "ufs_add_fragments", | |
507 | "internal error, bad magic number on cg %u", cgno); | |
508 | return 0; | |
509 | } | |
510 | ||
54fb996a | 511 | fragno = ufs_dtogd(uspi, fragment); |
1da177e4 LT |
512 | fragoff = ufs_fragnum (fragno); |
513 | for (i = oldcount; i < newcount; i++) | |
9695ef16 | 514 | if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i)) |
1da177e4 LT |
515 | return 0; |
516 | /* | |
517 | * Block can be extended | |
518 | */ | |
519 | ucg->cg_time = cpu_to_fs32(sb, get_seconds()); | |
520 | for (i = newcount; i < (uspi->s_fpb - fragoff); i++) | |
9695ef16 | 521 | if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i)) |
1da177e4 LT |
522 | break; |
523 | fragsize = i - oldcount; | |
524 | if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize])) | |
525 | ufs_panic (sb, "ufs_add_fragments", | |
526 | "internal error or corrupted bitmap on cg %u", cgno); | |
527 | fs32_sub(sb, &ucg->cg_frsum[fragsize], 1); | |
528 | if (fragsize != count) | |
529 | fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1); | |
530 | for (i = oldcount; i < newcount; i++) | |
9695ef16 | 531 | ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i); |
1da177e4 LT |
532 | if(DQUOT_ALLOC_BLOCK(inode, count)) { |
533 | *err = -EDQUOT; | |
534 | return 0; | |
535 | } | |
536 | ||
537 | fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); | |
538 | fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); | |
ee3ffd6c | 539 | uspi->cs_total.cs_nffree -= count; |
1da177e4 | 540 | |
9695ef16 ED |
541 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
542 | ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); | |
1da177e4 | 543 | if (sb->s_flags & MS_SYNCHRONOUS) { |
098d5af7 | 544 | ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); |
9695ef16 | 545 | ubh_wait_on_buffer (UCPI_UBH(ucpi)); |
1da177e4 LT |
546 | } |
547 | sb->s_dirt = 1; | |
548 | ||
54fb996a | 549 | UFSD("EXIT, fragment %llu\n", (unsigned long long)fragment); |
1da177e4 LT |
550 | |
551 | return fragment; | |
552 | } | |
553 | ||
554 | #define UFS_TEST_FREE_SPACE_CG \ | |
555 | ucg = (struct ufs_cylinder_group *) UFS_SB(sb)->s_ucg[cgno]->b_data; \ | |
556 | if (fs32_to_cpu(sb, ucg->cg_cs.cs_nbfree)) \ | |
557 | goto cg_found; \ | |
558 | for (k = count; k < uspi->s_fpb; k++) \ | |
559 | if (fs32_to_cpu(sb, ucg->cg_frsum[k])) \ | |
560 | goto cg_found; | |
561 | ||
54fb996a ED |
562 | static u64 ufs_alloc_fragments(struct inode *inode, unsigned cgno, |
563 | u64 goal, unsigned count, int *err) | |
1da177e4 LT |
564 | { |
565 | struct super_block * sb; | |
566 | struct ufs_sb_private_info * uspi; | |
567 | struct ufs_super_block_first * usb1; | |
568 | struct ufs_cg_private_info * ucpi; | |
569 | struct ufs_cylinder_group * ucg; | |
54fb996a ED |
570 | unsigned oldcg, i, j, k, allocsize; |
571 | u64 result; | |
1da177e4 | 572 | |
54fb996a ED |
573 | UFSD("ENTER, ino %lu, cgno %u, goal %llu, count %u\n", |
574 | inode->i_ino, cgno, (unsigned long long)goal, count); | |
1da177e4 LT |
575 | |
576 | sb = inode->i_sb; | |
577 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 578 | usb1 = ubh_get_usb_first(uspi); |
1da177e4 LT |
579 | oldcg = cgno; |
580 | ||
581 | /* | |
582 | * 1. searching on preferred cylinder group | |
583 | */ | |
584 | UFS_TEST_FREE_SPACE_CG | |
585 | ||
586 | /* | |
587 | * 2. quadratic rehash | |
588 | */ | |
589 | for (j = 1; j < uspi->s_ncg; j *= 2) { | |
590 | cgno += j; | |
591 | if (cgno >= uspi->s_ncg) | |
592 | cgno -= uspi->s_ncg; | |
593 | UFS_TEST_FREE_SPACE_CG | |
594 | } | |
595 | ||
596 | /* | |
597 | * 3. brute force search | |
598 | * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step ) | |
599 | */ | |
600 | cgno = (oldcg + 1) % uspi->s_ncg; | |
601 | for (j = 2; j < uspi->s_ncg; j++) { | |
602 | cgno++; | |
603 | if (cgno >= uspi->s_ncg) | |
604 | cgno = 0; | |
605 | UFS_TEST_FREE_SPACE_CG | |
606 | } | |
607 | ||
abf5d15f | 608 | UFSD("EXIT (FAILED)\n"); |
1da177e4 LT |
609 | return 0; |
610 | ||
611 | cg_found: | |
612 | ucpi = ufs_load_cylinder (sb, cgno); | |
613 | if (!ucpi) | |
614 | return 0; | |
9695ef16 | 615 | ucg = ubh_get_ucg (UCPI_UBH(ucpi)); |
1da177e4 LT |
616 | if (!ufs_cg_chkmagic(sb, ucg)) |
617 | ufs_panic (sb, "ufs_alloc_fragments", | |
618 | "internal error, bad magic number on cg %u", cgno); | |
619 | ucg->cg_time = cpu_to_fs32(sb, get_seconds()); | |
620 | ||
621 | if (count == uspi->s_fpb) { | |
622 | result = ufs_alloccg_block (inode, ucpi, goal, err); | |
54fb996a | 623 | if (result == INVBLOCK) |
1da177e4 LT |
624 | return 0; |
625 | goto succed; | |
626 | } | |
627 | ||
628 | for (allocsize = count; allocsize < uspi->s_fpb; allocsize++) | |
629 | if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0) | |
630 | break; | |
631 | ||
632 | if (allocsize == uspi->s_fpb) { | |
633 | result = ufs_alloccg_block (inode, ucpi, goal, err); | |
54fb996a | 634 | if (result == INVBLOCK) |
1da177e4 | 635 | return 0; |
54fb996a | 636 | goal = ufs_dtogd(uspi, result); |
1da177e4 | 637 | for (i = count; i < uspi->s_fpb; i++) |
9695ef16 | 638 | ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i); |
1da177e4 LT |
639 | i = uspi->s_fpb - count; |
640 | DQUOT_FREE_BLOCK(inode, i); | |
641 | ||
642 | fs32_add(sb, &ucg->cg_cs.cs_nffree, i); | |
ee3ffd6c | 643 | uspi->cs_total.cs_nffree += i; |
1da177e4 LT |
644 | fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i); |
645 | fs32_add(sb, &ucg->cg_frsum[i], 1); | |
646 | goto succed; | |
647 | } | |
648 | ||
649 | result = ufs_bitmap_search (sb, ucpi, goal, allocsize); | |
54fb996a | 650 | if (result == INVBLOCK) |
1da177e4 LT |
651 | return 0; |
652 | if(DQUOT_ALLOC_BLOCK(inode, count)) { | |
653 | *err = -EDQUOT; | |
654 | return 0; | |
655 | } | |
656 | for (i = 0; i < count; i++) | |
9695ef16 | 657 | ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i); |
1da177e4 LT |
658 | |
659 | fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); | |
ee3ffd6c | 660 | uspi->cs_total.cs_nffree -= count; |
1da177e4 LT |
661 | fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); |
662 | fs32_sub(sb, &ucg->cg_frsum[allocsize], 1); | |
663 | ||
664 | if (count != allocsize) | |
665 | fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1); | |
666 | ||
667 | succed: | |
9695ef16 ED |
668 | ubh_mark_buffer_dirty (USPI_UBH(uspi)); |
669 | ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); | |
1da177e4 | 670 | if (sb->s_flags & MS_SYNCHRONOUS) { |
098d5af7 | 671 | ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); |
9695ef16 | 672 | ubh_wait_on_buffer (UCPI_UBH(ucpi)); |
1da177e4 LT |
673 | } |
674 | sb->s_dirt = 1; | |
675 | ||
676 | result += cgno * uspi->s_fpg; | |
54fb996a | 677 | UFSD("EXIT3, result %llu\n", (unsigned long long)result); |
1da177e4 LT |
678 | return result; |
679 | } | |
680 | ||
54fb996a ED |
681 | static u64 ufs_alloccg_block(struct inode *inode, |
682 | struct ufs_cg_private_info *ucpi, | |
683 | u64 goal, int *err) | |
1da177e4 LT |
684 | { |
685 | struct super_block * sb; | |
686 | struct ufs_sb_private_info * uspi; | |
687 | struct ufs_super_block_first * usb1; | |
688 | struct ufs_cylinder_group * ucg; | |
54fb996a | 689 | u64 result, blkno; |
1da177e4 | 690 | |
54fb996a | 691 | UFSD("ENTER, goal %llu\n", (unsigned long long)goal); |
1da177e4 LT |
692 | |
693 | sb = inode->i_sb; | |
694 | uspi = UFS_SB(sb)->s_uspi; | |
7b4ee73e | 695 | usb1 = ubh_get_usb_first(uspi); |
9695ef16 | 696 | ucg = ubh_get_ucg(UCPI_UBH(ucpi)); |
1da177e4 LT |
697 | |
698 | if (goal == 0) { | |
699 | goal = ucpi->c_rotor; | |
700 | goto norot; | |
701 | } | |
702 | goal = ufs_blknum (goal); | |
54fb996a | 703 | goal = ufs_dtogd(uspi, goal); |
1da177e4 LT |
704 | |
705 | /* | |
706 | * If the requested block is available, use it. | |
707 | */ | |
9695ef16 | 708 | if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, ufs_fragstoblks(goal))) { |
1da177e4 LT |
709 | result = goal; |
710 | goto gotit; | |
711 | } | |
712 | ||
713 | norot: | |
714 | result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb); | |
54fb996a ED |
715 | if (result == INVBLOCK) |
716 | return INVBLOCK; | |
1da177e4 LT |
717 | ucpi->c_rotor = result; |
718 | gotit: | |
719 | blkno = ufs_fragstoblks(result); | |
9695ef16 | 720 | ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno); |
1da177e4 LT |
721 | if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) |
722 | ufs_clusteracct (sb, ucpi, blkno, -1); | |
723 | if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) { | |
724 | *err = -EDQUOT; | |
54fb996a | 725 | return INVBLOCK; |
1da177e4 LT |
726 | } |
727 | ||
728 | fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1); | |
ee3ffd6c | 729 | uspi->cs_total.cs_nbfree--; |
1da177e4 | 730 | fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1); |
54fb996a ED |
731 | |
732 | if (uspi->fs_magic != UFS2_MAGIC) { | |
733 | unsigned cylno = ufs_cbtocylno((unsigned)result); | |
734 | ||
735 | fs16_sub(sb, &ubh_cg_blks(ucpi, cylno, | |
736 | ufs_cbtorpos((unsigned)result)), 1); | |
737 | fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1); | |
738 | } | |
1da177e4 | 739 | |
54fb996a | 740 | UFSD("EXIT, result %llu\n", (unsigned long long)result); |
1da177e4 LT |
741 | |
742 | return result; | |
743 | } | |
744 | ||
3e41f597 ED |
745 | static unsigned ubh_scanc(struct ufs_sb_private_info *uspi, |
746 | struct ufs_buffer_head *ubh, | |
747 | unsigned begin, unsigned size, | |
748 | unsigned char *table, unsigned char mask) | |
1da177e4 | 749 | { |
3e41f597 ED |
750 | unsigned rest, offset; |
751 | unsigned char *cp; | |
1da177e4 | 752 | |
1da177e4 | 753 | |
3e41f597 ED |
754 | offset = begin & ~uspi->s_fmask; |
755 | begin >>= uspi->s_fshift; | |
756 | for (;;) { | |
757 | if ((offset + size) < uspi->s_fsize) | |
758 | rest = size; | |
759 | else | |
760 | rest = uspi->s_fsize - offset; | |
761 | size -= rest; | |
762 | cp = ubh->bh[begin]->b_data + offset; | |
763 | while ((table[*cp++] & mask) == 0 && --rest) | |
764 | ; | |
765 | if (rest || !size) | |
766 | break; | |
767 | begin++; | |
768 | offset = 0; | |
769 | } | |
770 | return (size + rest); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Find a block of the specified size in the specified cylinder group. | |
775 | * @sp: pointer to super block | |
776 | * @ucpi: pointer to cylinder group info | |
777 | * @goal: near which block we want find new one | |
778 | * @count: specified size | |
779 | */ | |
54fb996a ED |
780 | static u64 ufs_bitmap_search(struct super_block *sb, |
781 | struct ufs_cg_private_info *ucpi, | |
782 | u64 goal, unsigned count) | |
3e41f597 ED |
783 | { |
784 | /* | |
785 | * Bit patterns for identifying fragments in the block map | |
786 | * used as ((map & mask_arr) == want_arr) | |
787 | */ | |
788 | static const int mask_arr[9] = { | |
789 | 0x3, 0x7, 0xf, 0x1f, 0x3f, 0x7f, 0xff, 0x1ff, 0x3ff | |
790 | }; | |
791 | static const int want_arr[9] = { | |
792 | 0x0, 0x2, 0x6, 0xe, 0x1e, 0x3e, 0x7e, 0xfe, 0x1fe | |
793 | }; | |
794 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
795 | struct ufs_super_block_first *usb1; | |
796 | struct ufs_cylinder_group *ucg; | |
54fb996a | 797 | unsigned start, length, loc; |
3e41f597 | 798 | unsigned pos, want, blockmap, mask, end; |
54fb996a | 799 | u64 result; |
3e41f597 | 800 | |
54fb996a ED |
801 | UFSD("ENTER, cg %u, goal %llu, count %u\n", ucpi->c_cgx, |
802 | (unsigned long long)goal, count); | |
3e41f597 | 803 | |
7b4ee73e | 804 | usb1 = ubh_get_usb_first (uspi); |
9695ef16 | 805 | ucg = ubh_get_ucg(UCPI_UBH(ucpi)); |
1da177e4 LT |
806 | |
807 | if (goal) | |
54fb996a | 808 | start = ufs_dtogd(uspi, goal) >> 3; |
1da177e4 LT |
809 | else |
810 | start = ucpi->c_frotor >> 3; | |
811 | ||
812 | length = ((uspi->s_fpg + 7) >> 3) - start; | |
3e41f597 | 813 | loc = ubh_scanc(uspi, UCPI_UBH(ucpi), ucpi->c_freeoff + start, length, |
1da177e4 LT |
814 | (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other, |
815 | 1 << (count - 1 + (uspi->s_fpb & 7))); | |
3e41f597 | 816 | if (loc == 0) { |
1da177e4 | 817 | length = start + 1; |
3e41f597 ED |
818 | loc = ubh_scanc(uspi, UCPI_UBH(ucpi), ucpi->c_freeoff, length, |
819 | (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : | |
820 | ufs_fragtable_other, | |
821 | 1 << (count - 1 + (uspi->s_fpb & 7))); | |
822 | if (loc == 0) { | |
823 | ufs_error(sb, "ufs_bitmap_search", | |
824 | "bitmap corrupted on cg %u, start %u," | |
825 | " length %u, count %u, freeoff %u\n", | |
826 | ucpi->c_cgx, start, length, count, | |
827 | ucpi->c_freeoff); | |
54fb996a | 828 | return INVBLOCK; |
1da177e4 LT |
829 | } |
830 | start = 0; | |
831 | } | |
3e41f597 | 832 | result = (start + length - loc) << 3; |
1da177e4 LT |
833 | ucpi->c_frotor = result; |
834 | ||
835 | /* | |
836 | * found the byte in the map | |
837 | */ | |
3e41f597 ED |
838 | |
839 | for (end = result + 8; result < end; result += uspi->s_fpb) { | |
840 | blockmap = ubh_blkmap(UCPI_UBH(ucpi), ucpi->c_freeoff, result); | |
841 | blockmap <<= 1; | |
842 | mask = mask_arr[count]; | |
843 | want = want_arr[count]; | |
844 | for (pos = 0; pos <= uspi->s_fpb - count; pos++) { | |
845 | if ((blockmap & mask) == want) { | |
54fb996a ED |
846 | UFSD("EXIT, result %llu\n", |
847 | (unsigned long long)result); | |
3e41f597 ED |
848 | return result + pos; |
849 | } | |
850 | mask <<= 1; | |
851 | want <<= 1; | |
852 | } | |
853 | } | |
854 | ||
855 | ufs_error(sb, "ufs_bitmap_search", "block not in map on cg %u\n", | |
856 | ucpi->c_cgx); | |
abf5d15f | 857 | UFSD("EXIT (FAILED)\n"); |
54fb996a | 858 | return INVBLOCK; |
1da177e4 LT |
859 | } |
860 | ||
861 | static void ufs_clusteracct(struct super_block * sb, | |
862 | struct ufs_cg_private_info * ucpi, unsigned blkno, int cnt) | |
863 | { | |
864 | struct ufs_sb_private_info * uspi; | |
865 | int i, start, end, forw, back; | |
866 | ||
867 | uspi = UFS_SB(sb)->s_uspi; | |
868 | if (uspi->s_contigsumsize <= 0) | |
869 | return; | |
870 | ||
871 | if (cnt > 0) | |
9695ef16 | 872 | ubh_setbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno); |
1da177e4 | 873 | else |
9695ef16 | 874 | ubh_clrbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno); |
1da177e4 LT |
875 | |
876 | /* | |
877 | * Find the size of the cluster going forward. | |
878 | */ | |
879 | start = blkno + 1; | |
880 | end = start + uspi->s_contigsumsize; | |
881 | if ( end >= ucpi->c_nclusterblks) | |
882 | end = ucpi->c_nclusterblks; | |
9695ef16 | 883 | i = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, end, start); |
1da177e4 LT |
884 | if (i > end) |
885 | i = end; | |
886 | forw = i - start; | |
887 | ||
888 | /* | |
889 | * Find the size of the cluster going backward. | |
890 | */ | |
891 | start = blkno - 1; | |
892 | end = start - uspi->s_contigsumsize; | |
893 | if (end < 0 ) | |
894 | end = -1; | |
9695ef16 | 895 | i = ubh_find_last_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, start, end); |
1da177e4 LT |
896 | if ( i < end) |
897 | i = end; | |
898 | back = start - i; | |
899 | ||
900 | /* | |
901 | * Account for old cluster and the possibly new forward and | |
902 | * back clusters. | |
903 | */ | |
904 | i = back + forw + 1; | |
905 | if (i > uspi->s_contigsumsize) | |
906 | i = uspi->s_contigsumsize; | |
9695ef16 | 907 | fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (i << 2)), cnt); |
1da177e4 | 908 | if (back > 0) |
9695ef16 | 909 | fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (back << 2)), cnt); |
1da177e4 | 910 | if (forw > 0) |
9695ef16 | 911 | fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (forw << 2)), cnt); |
1da177e4 LT |
912 | } |
913 | ||
914 | ||
915 | static unsigned char ufs_fragtable_8fpb[] = { | |
916 | 0x00, 0x01, 0x01, 0x02, 0x01, 0x01, 0x02, 0x04, 0x01, 0x01, 0x01, 0x03, 0x02, 0x03, 0x04, 0x08, | |
917 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x02, 0x03, 0x03, 0x02, 0x04, 0x05, 0x08, 0x10, | |
918 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, | |
919 | 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x04, 0x05, 0x05, 0x06, 0x08, 0x09, 0x10, 0x20, | |
920 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, | |
921 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, | |
922 | 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, | |
923 | 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x08, 0x09, 0x09, 0x0A, 0x10, 0x11, 0x20, 0x40, | |
924 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, | |
925 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, | |
926 | 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, | |
927 | 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x05, 0x05, 0x05, 0x07, 0x09, 0x09, 0x11, 0x21, | |
928 | 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, | |
929 | 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x02, 0x03, 0x03, 0x02, 0x06, 0x07, 0x0A, 0x12, | |
930 | 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x04, 0x0C, | |
931 | 0x08, 0x09, 0x09, 0x0A, 0x09, 0x09, 0x0A, 0x0C, 0x10, 0x11, 0x11, 0x12, 0x20, 0x21, 0x40, 0x80, | |
932 | }; | |
933 | ||
934 | static unsigned char ufs_fragtable_other[] = { | |
935 | 0x00, 0x16, 0x16, 0x2A, 0x16, 0x16, 0x26, 0x4E, 0x16, 0x16, 0x16, 0x3E, 0x2A, 0x3E, 0x4E, 0x8A, | |
936 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
937 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
938 | 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, | |
939 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
940 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
941 | 0x26, 0x36, 0x36, 0x2E, 0x36, 0x36, 0x26, 0x6E, 0x36, 0x36, 0x36, 0x3E, 0x2E, 0x3E, 0x6E, 0xAE, | |
942 | 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, | |
943 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
944 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
945 | 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, | |
946 | 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, | |
947 | 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, | |
948 | 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, | |
949 | 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, | |
950 | 0x8A, 0x9E, 0x9E, 0xAA, 0x9E, 0x9E, 0xAE, 0xCE, 0x9E, 0x9E, 0x9E, 0xBE, 0xAA, 0xBE, 0xCE, 0x8A, | |
951 | }; |