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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/hfsplus/extents.c | |
3 | * | |
4 | * Copyright (C) 2001 | |
5 | * Brad Boyer (flar@allandria.com) | |
6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
7 | * | |
8 | * Handling of Extents both in catalog and extents overflow trees | |
9 | */ | |
10 | ||
11 | #include <linux/errno.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/pagemap.h> | |
1da177e4 LT |
14 | |
15 | #include "hfsplus_fs.h" | |
16 | #include "hfsplus_raw.h" | |
17 | ||
18 | /* Compare two extents keys, returns 0 on same, pos/neg for difference */ | |
2179d372 DE |
19 | int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1, |
20 | const hfsplus_btree_key *k2) | |
1da177e4 LT |
21 | { |
22 | __be32 k1id, k2id; | |
23 | __be32 k1s, k2s; | |
24 | ||
25 | k1id = k1->ext.cnid; | |
26 | k2id = k2->ext.cnid; | |
27 | if (k1id != k2id) | |
28 | return be32_to_cpu(k1id) < be32_to_cpu(k2id) ? -1 : 1; | |
29 | ||
30 | if (k1->ext.fork_type != k2->ext.fork_type) | |
31 | return k1->ext.fork_type < k2->ext.fork_type ? -1 : 1; | |
32 | ||
33 | k1s = k1->ext.start_block; | |
34 | k2s = k2->ext.start_block; | |
35 | if (k1s == k2s) | |
36 | return 0; | |
37 | return be32_to_cpu(k1s) < be32_to_cpu(k2s) ? -1 : 1; | |
38 | } | |
39 | ||
40 | static void hfsplus_ext_build_key(hfsplus_btree_key *key, u32 cnid, | |
41 | u32 block, u8 type) | |
42 | { | |
43 | key->key_len = cpu_to_be16(HFSPLUS_EXT_KEYLEN - 2); | |
44 | key->ext.cnid = cpu_to_be32(cnid); | |
45 | key->ext.start_block = cpu_to_be32(block); | |
46 | key->ext.fork_type = type; | |
47 | key->ext.pad = 0; | |
48 | } | |
49 | ||
50 | static u32 hfsplus_ext_find_block(struct hfsplus_extent *ext, u32 off) | |
51 | { | |
52 | int i; | |
53 | u32 count; | |
54 | ||
55 | for (i = 0; i < 8; ext++, i++) { | |
56 | count = be32_to_cpu(ext->block_count); | |
57 | if (off < count) | |
58 | return be32_to_cpu(ext->start_block) + off; | |
59 | off -= count; | |
60 | } | |
61 | /* panic? */ | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static int hfsplus_ext_block_count(struct hfsplus_extent *ext) | |
66 | { | |
67 | int i; | |
68 | u32 count = 0; | |
69 | ||
70 | for (i = 0; i < 8; ext++, i++) | |
71 | count += be32_to_cpu(ext->block_count); | |
72 | return count; | |
73 | } | |
74 | ||
75 | static u32 hfsplus_ext_lastblock(struct hfsplus_extent *ext) | |
76 | { | |
77 | int i; | |
78 | ||
79 | ext += 7; | |
80 | for (i = 0; i < 7; ext--, i++) | |
81 | if (ext->block_count) | |
82 | break; | |
83 | return be32_to_cpu(ext->start_block) + be32_to_cpu(ext->block_count); | |
84 | } | |
85 | ||
86 | static void __hfsplus_ext_write_extent(struct inode *inode, struct hfs_find_data *fd) | |
87 | { | |
6af502de | 88 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
89 | int res; |
90 | ||
7fcc99f4 CH |
91 | WARN_ON(!mutex_is_locked(&hip->extents_lock)); |
92 | ||
6af502de CH |
93 | hfsplus_ext_build_key(fd->search_key, inode->i_ino, hip->cached_start, |
94 | HFSPLUS_IS_RSRC(inode) ? | |
95 | HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA); | |
96 | ||
1da177e4 | 97 | res = hfs_brec_find(fd); |
6af502de | 98 | if (hip->flags & HFSPLUS_FLG_EXT_NEW) { |
1da177e4 LT |
99 | if (res != -ENOENT) |
100 | return; | |
6af502de CH |
101 | hfs_brec_insert(fd, hip->cached_extents, |
102 | sizeof(hfsplus_extent_rec)); | |
103 | hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); | |
1da177e4 LT |
104 | } else { |
105 | if (res) | |
106 | return; | |
6af502de CH |
107 | hfs_bnode_write(fd->bnode, hip->cached_extents, |
108 | fd->entryoffset, fd->entrylength); | |
109 | hip->flags &= ~HFSPLUS_FLG_EXT_DIRTY; | |
1da177e4 LT |
110 | } |
111 | } | |
112 | ||
7fcc99f4 | 113 | static void hfsplus_ext_write_extent_locked(struct inode *inode) |
1da177e4 | 114 | { |
6af502de | 115 | if (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_EXT_DIRTY) { |
1da177e4 LT |
116 | struct hfs_find_data fd; |
117 | ||
dd73a01a | 118 | hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd); |
1da177e4 LT |
119 | __hfsplus_ext_write_extent(inode, &fd); |
120 | hfs_find_exit(&fd); | |
121 | } | |
122 | } | |
123 | ||
7fcc99f4 CH |
124 | void hfsplus_ext_write_extent(struct inode *inode) |
125 | { | |
126 | mutex_lock(&HFSPLUS_I(inode)->extents_lock); | |
127 | hfsplus_ext_write_extent_locked(inode); | |
128 | mutex_unlock(&HFSPLUS_I(inode)->extents_lock); | |
129 | } | |
130 | ||
1da177e4 LT |
131 | static inline int __hfsplus_ext_read_extent(struct hfs_find_data *fd, |
132 | struct hfsplus_extent *extent, | |
133 | u32 cnid, u32 block, u8 type) | |
134 | { | |
135 | int res; | |
136 | ||
137 | hfsplus_ext_build_key(fd->search_key, cnid, block, type); | |
138 | fd->key->ext.cnid = 0; | |
139 | res = hfs_brec_find(fd); | |
140 | if (res && res != -ENOENT) | |
141 | return res; | |
142 | if (fd->key->ext.cnid != fd->search_key->ext.cnid || | |
143 | fd->key->ext.fork_type != fd->search_key->ext.fork_type) | |
144 | return -ENOENT; | |
145 | if (fd->entrylength != sizeof(hfsplus_extent_rec)) | |
146 | return -EIO; | |
147 | hfs_bnode_read(fd->bnode, extent, fd->entryoffset, sizeof(hfsplus_extent_rec)); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, struct inode *inode, u32 block) | |
152 | { | |
6af502de | 153 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
154 | int res; |
155 | ||
7fcc99f4 CH |
156 | WARN_ON(!mutex_is_locked(&hip->extents_lock)); |
157 | ||
6af502de | 158 | if (hip->flags & HFSPLUS_FLG_EXT_DIRTY) |
1da177e4 LT |
159 | __hfsplus_ext_write_extent(inode, fd); |
160 | ||
6af502de CH |
161 | res = __hfsplus_ext_read_extent(fd, hip->cached_extents, inode->i_ino, |
162 | block, HFSPLUS_IS_RSRC(inode) ? | |
163 | HFSPLUS_TYPE_RSRC : | |
164 | HFSPLUS_TYPE_DATA); | |
1da177e4 | 165 | if (!res) { |
6af502de CH |
166 | hip->cached_start = be32_to_cpu(fd->key->ext.start_block); |
167 | hip->cached_blocks = hfsplus_ext_block_count(hip->cached_extents); | |
1da177e4 | 168 | } else { |
6af502de CH |
169 | hip->cached_start = hip->cached_blocks = 0; |
170 | hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); | |
1da177e4 LT |
171 | } |
172 | return res; | |
173 | } | |
174 | ||
175 | static int hfsplus_ext_read_extent(struct inode *inode, u32 block) | |
176 | { | |
6af502de | 177 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
178 | struct hfs_find_data fd; |
179 | int res; | |
180 | ||
6af502de CH |
181 | if (block >= hip->cached_start && |
182 | block < hip->cached_start + hip->cached_blocks) | |
1da177e4 LT |
183 | return 0; |
184 | ||
dd73a01a | 185 | hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd); |
1da177e4 LT |
186 | res = __hfsplus_ext_cache_extent(&fd, inode, block); |
187 | hfs_find_exit(&fd); | |
188 | return res; | |
189 | } | |
190 | ||
191 | /* Get a block at iblock for inode, possibly allocating if create */ | |
192 | int hfsplus_get_block(struct inode *inode, sector_t iblock, | |
193 | struct buffer_head *bh_result, int create) | |
194 | { | |
dd73a01a CH |
195 | struct super_block *sb = inode->i_sb; |
196 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); | |
6af502de | 197 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
198 | int res = -EIO; |
199 | u32 ablock, dblock, mask; | |
200 | int shift; | |
201 | ||
1da177e4 | 202 | /* Convert inode block to disk allocation block */ |
dd73a01a CH |
203 | shift = sbi->alloc_blksz_shift - sb->s_blocksize_bits; |
204 | ablock = iblock >> sbi->fs_shift; | |
1da177e4 | 205 | |
6af502de CH |
206 | if (iblock >= hip->fs_blocks) { |
207 | if (iblock > hip->fs_blocks || !create) | |
1da177e4 | 208 | return -EIO; |
6af502de | 209 | if (ablock >= hip->alloc_blocks) { |
1da177e4 LT |
210 | res = hfsplus_file_extend(inode); |
211 | if (res) | |
212 | return res; | |
213 | } | |
214 | } else | |
215 | create = 0; | |
216 | ||
6af502de CH |
217 | if (ablock < hip->first_blocks) { |
218 | dblock = hfsplus_ext_find_block(hip->first_extents, ablock); | |
1da177e4 LT |
219 | goto done; |
220 | } | |
221 | ||
248736c2 ES |
222 | if (inode->i_ino == HFSPLUS_EXT_CNID) |
223 | return -EIO; | |
224 | ||
6af502de | 225 | mutex_lock(&hip->extents_lock); |
1da177e4 LT |
226 | res = hfsplus_ext_read_extent(inode, ablock); |
227 | if (!res) { | |
6af502de CH |
228 | dblock = hfsplus_ext_find_block(hip->cached_extents, |
229 | ablock - hip->cached_start); | |
1da177e4 | 230 | } else { |
6af502de | 231 | mutex_unlock(&hip->extents_lock); |
1da177e4 LT |
232 | return -EIO; |
233 | } | |
6af502de | 234 | mutex_unlock(&hip->extents_lock); |
1da177e4 LT |
235 | |
236 | done: | |
237 | dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock); | |
dd73a01a CH |
238 | mask = (1 << sbi->fs_shift) - 1; |
239 | map_bh(bh_result, sb, (dblock << sbi->fs_shift) + sbi->blockoffset + (iblock & mask)); | |
1da177e4 LT |
240 | if (create) { |
241 | set_buffer_new(bh_result); | |
6af502de CH |
242 | hip->phys_size += sb->s_blocksize; |
243 | hip->fs_blocks++; | |
1da177e4 LT |
244 | inode_add_bytes(inode, sb->s_blocksize); |
245 | mark_inode_dirty(inode); | |
246 | } | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static void hfsplus_dump_extent(struct hfsplus_extent *extent) | |
251 | { | |
252 | int i; | |
253 | ||
254 | dprint(DBG_EXTENT, " "); | |
255 | for (i = 0; i < 8; i++) | |
256 | dprint(DBG_EXTENT, " %u:%u", be32_to_cpu(extent[i].start_block), | |
257 | be32_to_cpu(extent[i].block_count)); | |
258 | dprint(DBG_EXTENT, "\n"); | |
259 | } | |
260 | ||
261 | static int hfsplus_add_extent(struct hfsplus_extent *extent, u32 offset, | |
262 | u32 alloc_block, u32 block_count) | |
263 | { | |
264 | u32 count, start; | |
265 | int i; | |
266 | ||
267 | hfsplus_dump_extent(extent); | |
268 | for (i = 0; i < 8; extent++, i++) { | |
269 | count = be32_to_cpu(extent->block_count); | |
270 | if (offset == count) { | |
271 | start = be32_to_cpu(extent->start_block); | |
272 | if (alloc_block != start + count) { | |
273 | if (++i >= 8) | |
274 | return -ENOSPC; | |
275 | extent++; | |
276 | extent->start_block = cpu_to_be32(alloc_block); | |
277 | } else | |
278 | block_count += count; | |
279 | extent->block_count = cpu_to_be32(block_count); | |
280 | return 0; | |
281 | } else if (offset < count) | |
282 | break; | |
283 | offset -= count; | |
284 | } | |
285 | /* panic? */ | |
286 | return -EIO; | |
287 | } | |
288 | ||
289 | static int hfsplus_free_extents(struct super_block *sb, | |
290 | struct hfsplus_extent *extent, | |
291 | u32 offset, u32 block_nr) | |
292 | { | |
293 | u32 count, start; | |
294 | int i; | |
295 | ||
296 | hfsplus_dump_extent(extent); | |
297 | for (i = 0; i < 8; extent++, i++) { | |
298 | count = be32_to_cpu(extent->block_count); | |
299 | if (offset == count) | |
300 | goto found; | |
301 | else if (offset < count) | |
302 | break; | |
303 | offset -= count; | |
304 | } | |
305 | /* panic? */ | |
306 | return -EIO; | |
307 | found: | |
308 | for (;;) { | |
309 | start = be32_to_cpu(extent->start_block); | |
310 | if (count <= block_nr) { | |
311 | hfsplus_block_free(sb, start, count); | |
312 | extent->block_count = 0; | |
313 | extent->start_block = 0; | |
314 | block_nr -= count; | |
315 | } else { | |
316 | count -= block_nr; | |
317 | hfsplus_block_free(sb, start + count, block_nr); | |
318 | extent->block_count = cpu_to_be32(count); | |
319 | block_nr = 0; | |
320 | } | |
321 | if (!block_nr || !i) | |
322 | return 0; | |
323 | i--; | |
324 | extent--; | |
325 | count = be32_to_cpu(extent->block_count); | |
326 | } | |
327 | } | |
328 | ||
329 | int hfsplus_free_fork(struct super_block *sb, u32 cnid, struct hfsplus_fork_raw *fork, int type) | |
330 | { | |
331 | struct hfs_find_data fd; | |
332 | hfsplus_extent_rec ext_entry; | |
333 | u32 total_blocks, blocks, start; | |
334 | int res, i; | |
335 | ||
336 | total_blocks = be32_to_cpu(fork->total_blocks); | |
337 | if (!total_blocks) | |
338 | return 0; | |
339 | ||
340 | blocks = 0; | |
341 | for (i = 0; i < 8; i++) | |
342 | blocks += be32_to_cpu(fork->extents[i].block_count); | |
343 | ||
344 | res = hfsplus_free_extents(sb, fork->extents, blocks, blocks); | |
345 | if (res) | |
346 | return res; | |
347 | if (total_blocks == blocks) | |
348 | return 0; | |
349 | ||
dd73a01a | 350 | hfs_find_init(HFSPLUS_SB(sb)->ext_tree, &fd); |
1da177e4 LT |
351 | do { |
352 | res = __hfsplus_ext_read_extent(&fd, ext_entry, cnid, | |
353 | total_blocks, type); | |
354 | if (res) | |
355 | break; | |
356 | start = be32_to_cpu(fd.key->ext.start_block); | |
357 | hfsplus_free_extents(sb, ext_entry, | |
358 | total_blocks - start, | |
359 | total_blocks); | |
360 | hfs_brec_remove(&fd); | |
361 | total_blocks = start; | |
362 | } while (total_blocks > blocks); | |
363 | hfs_find_exit(&fd); | |
364 | ||
365 | return res; | |
366 | } | |
367 | ||
368 | int hfsplus_file_extend(struct inode *inode) | |
369 | { | |
370 | struct super_block *sb = inode->i_sb; | |
dd73a01a | 371 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
6af502de | 372 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
373 | u32 start, len, goal; |
374 | int res; | |
375 | ||
dd73a01a CH |
376 | if (sbi->alloc_file->i_size * 8 < |
377 | sbi->total_blocks - sbi->free_blocks + 8) { | |
1da177e4 | 378 | // extend alloc file |
dd73a01a CH |
379 | printk(KERN_ERR "hfs: extend alloc file! (%Lu,%u,%u)\n", |
380 | sbi->alloc_file->i_size * 8, | |
381 | sbi->total_blocks, sbi->free_blocks); | |
1da177e4 | 382 | return -ENOSPC; |
1da177e4 LT |
383 | } |
384 | ||
6af502de CH |
385 | mutex_lock(&hip->extents_lock); |
386 | if (hip->alloc_blocks == hip->first_blocks) | |
387 | goal = hfsplus_ext_lastblock(hip->first_extents); | |
1da177e4 | 388 | else { |
6af502de | 389 | res = hfsplus_ext_read_extent(inode, hip->alloc_blocks); |
1da177e4 LT |
390 | if (res) |
391 | goto out; | |
6af502de | 392 | goal = hfsplus_ext_lastblock(hip->cached_extents); |
1da177e4 LT |
393 | } |
394 | ||
6af502de | 395 | len = hip->clump_blocks; |
dd73a01a CH |
396 | start = hfsplus_block_allocate(sb, sbi->total_blocks, goal, &len); |
397 | if (start >= sbi->total_blocks) { | |
1da177e4 LT |
398 | start = hfsplus_block_allocate(sb, goal, 0, &len); |
399 | if (start >= goal) { | |
400 | res = -ENOSPC; | |
401 | goto out; | |
402 | } | |
403 | } | |
404 | ||
405 | dprint(DBG_EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len); | |
6af502de CH |
406 | |
407 | if (hip->alloc_blocks <= hip->first_blocks) { | |
408 | if (!hip->first_blocks) { | |
1da177e4 LT |
409 | dprint(DBG_EXTENT, "first extents\n"); |
410 | /* no extents yet */ | |
6af502de CH |
411 | hip->first_extents[0].start_block = cpu_to_be32(start); |
412 | hip->first_extents[0].block_count = cpu_to_be32(len); | |
1da177e4 LT |
413 | res = 0; |
414 | } else { | |
415 | /* try to append to extents in inode */ | |
6af502de CH |
416 | res = hfsplus_add_extent(hip->first_extents, |
417 | hip->alloc_blocks, | |
1da177e4 LT |
418 | start, len); |
419 | if (res == -ENOSPC) | |
420 | goto insert_extent; | |
421 | } | |
422 | if (!res) { | |
6af502de CH |
423 | hfsplus_dump_extent(hip->first_extents); |
424 | hip->first_blocks += len; | |
1da177e4 LT |
425 | } |
426 | } else { | |
6af502de CH |
427 | res = hfsplus_add_extent(hip->cached_extents, |
428 | hip->alloc_blocks - hip->cached_start, | |
1da177e4 LT |
429 | start, len); |
430 | if (!res) { | |
6af502de CH |
431 | hfsplus_dump_extent(hip->cached_extents); |
432 | hip->flags |= HFSPLUS_FLG_EXT_DIRTY; | |
433 | hip->cached_blocks += len; | |
1da177e4 LT |
434 | } else if (res == -ENOSPC) |
435 | goto insert_extent; | |
436 | } | |
437 | out: | |
6af502de | 438 | mutex_unlock(&hip->extents_lock); |
1da177e4 | 439 | if (!res) { |
6af502de | 440 | hip->alloc_blocks += len; |
1da177e4 LT |
441 | mark_inode_dirty(inode); |
442 | } | |
443 | return res; | |
444 | ||
445 | insert_extent: | |
446 | dprint(DBG_EXTENT, "insert new extent\n"); | |
7fcc99f4 | 447 | hfsplus_ext_write_extent_locked(inode); |
1da177e4 | 448 | |
6af502de CH |
449 | memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); |
450 | hip->cached_extents[0].start_block = cpu_to_be32(start); | |
451 | hip->cached_extents[0].block_count = cpu_to_be32(len); | |
452 | hfsplus_dump_extent(hip->cached_extents); | |
453 | hip->flags |= HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW; | |
454 | hip->cached_start = hip->alloc_blocks; | |
455 | hip->cached_blocks = len; | |
1da177e4 LT |
456 | |
457 | res = 0; | |
458 | goto out; | |
459 | } | |
460 | ||
461 | void hfsplus_file_truncate(struct inode *inode) | |
462 | { | |
463 | struct super_block *sb = inode->i_sb; | |
6af502de | 464 | struct hfsplus_inode_info *hip = HFSPLUS_I(inode); |
1da177e4 LT |
465 | struct hfs_find_data fd; |
466 | u32 alloc_cnt, blk_cnt, start; | |
467 | int res; | |
468 | ||
6af502de CH |
469 | dprint(DBG_INODE, "truncate: %lu, %Lu -> %Lu\n", |
470 | inode->i_ino, (long long)hip->phys_size, inode->i_size); | |
471 | ||
472 | if (inode->i_size > hip->phys_size) { | |
1da177e4 LT |
473 | struct address_space *mapping = inode->i_mapping; |
474 | struct page *page; | |
7c0efc62 NP |
475 | void *fsdata; |
476 | u32 size = inode->i_size; | |
1da177e4 LT |
477 | int res; |
478 | ||
7c0efc62 NP |
479 | res = pagecache_write_begin(NULL, mapping, size, 0, |
480 | AOP_FLAG_UNINTERRUPTIBLE, | |
481 | &page, &fsdata); | |
1da177e4 | 482 | if (res) |
7c0efc62 NP |
483 | return; |
484 | res = pagecache_write_end(NULL, mapping, size, 0, 0, page, fsdata); | |
485 | if (res < 0) | |
486 | return; | |
1da177e4 LT |
487 | mark_inode_dirty(inode); |
488 | return; | |
6af502de | 489 | } else if (inode->i_size == hip->phys_size) |
f76d28d2 RZ |
490 | return; |
491 | ||
dd73a01a CH |
492 | blk_cnt = (inode->i_size + HFSPLUS_SB(sb)->alloc_blksz - 1) >> |
493 | HFSPLUS_SB(sb)->alloc_blksz_shift; | |
6af502de | 494 | alloc_cnt = hip->alloc_blocks; |
1da177e4 LT |
495 | if (blk_cnt == alloc_cnt) |
496 | goto out; | |
497 | ||
6af502de | 498 | mutex_lock(&hip->extents_lock); |
dd73a01a | 499 | hfs_find_init(HFSPLUS_SB(sb)->ext_tree, &fd); |
1da177e4 | 500 | while (1) { |
6af502de CH |
501 | if (alloc_cnt == hip->first_blocks) { |
502 | hfsplus_free_extents(sb, hip->first_extents, | |
1da177e4 | 503 | alloc_cnt, alloc_cnt - blk_cnt); |
6af502de CH |
504 | hfsplus_dump_extent(hip->first_extents); |
505 | hip->first_blocks = blk_cnt; | |
1da177e4 LT |
506 | break; |
507 | } | |
508 | res = __hfsplus_ext_cache_extent(&fd, inode, alloc_cnt); | |
509 | if (res) | |
510 | break; | |
6af502de CH |
511 | start = hip->cached_start; |
512 | hfsplus_free_extents(sb, hip->cached_extents, | |
1da177e4 | 513 | alloc_cnt - start, alloc_cnt - blk_cnt); |
6af502de | 514 | hfsplus_dump_extent(hip->cached_extents); |
1da177e4 | 515 | if (blk_cnt > start) { |
6af502de | 516 | hip->flags |= HFSPLUS_FLG_EXT_DIRTY; |
1da177e4 LT |
517 | break; |
518 | } | |
519 | alloc_cnt = start; | |
6af502de CH |
520 | hip->cached_start = hip->cached_blocks = 0; |
521 | hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); | |
1da177e4 LT |
522 | hfs_brec_remove(&fd); |
523 | } | |
524 | hfs_find_exit(&fd); | |
6af502de | 525 | mutex_unlock(&hip->extents_lock); |
1da177e4 | 526 | |
6af502de | 527 | hip->alloc_blocks = blk_cnt; |
1da177e4 | 528 | out: |
6af502de CH |
529 | hip->phys_size = inode->i_size; |
530 | hip->fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
531 | inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); | |
1da177e4 LT |
532 | mark_inode_dirty(inode); |
533 | } |