Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ufs/inode.c | |
3 | * | |
4 | * Copyright (C) 1998 | |
5 | * Daniel Pirkl <daniel.pirkl@email.cz> | |
6 | * Charles University, Faculty of Mathematics and Physics | |
7 | * | |
8 | * from | |
9 | * | |
10 | * linux/fs/ext2/inode.c | |
11 | * | |
12 | * Copyright (C) 1992, 1993, 1994, 1995 | |
13 | * Remy Card (card@masi.ibp.fr) | |
14 | * Laboratoire MASI - Institut Blaise Pascal | |
15 | * Universite Pierre et Marie Curie (Paris VI) | |
16 | * | |
17 | * from | |
18 | * | |
19 | * linux/fs/minix/inode.c | |
20 | * | |
21 | * Copyright (C) 1991, 1992 Linus Torvalds | |
22 | * | |
23 | * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 | |
24 | * Big-endian to little-endian byte-swapping/bitmaps by | |
25 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
26 | */ | |
27 | ||
28 | #include <asm/uaccess.h> | |
1da177e4 LT |
29 | |
30 | #include <linux/errno.h> | |
31 | #include <linux/fs.h> | |
1da177e4 LT |
32 | #include <linux/time.h> |
33 | #include <linux/stat.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/mm.h> | |
1da177e4 | 36 | #include <linux/buffer_head.h> |
a9185b41 | 37 | #include <linux/writeback.h> |
1da177e4 | 38 | |
e5420598 | 39 | #include "ufs_fs.h" |
bcd6d4ec | 40 | #include "ufs.h" |
1da177e4 LT |
41 | #include "swab.h" |
42 | #include "util.h" | |
43 | ||
4e3911f3 | 44 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
1da177e4 LT |
45 | { |
46 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
47 | int ptrs = uspi->s_apb; | |
48 | int ptrs_bits = uspi->s_apbshift; | |
49 | const long direct_blocks = UFS_NDADDR, | |
50 | indirect_blocks = ptrs, | |
51 | double_blocks = (1 << (ptrs_bits * 2)); | |
52 | int n = 0; | |
53 | ||
54 | ||
abf5d15f | 55 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
37044c86 | 56 | if (i_block < direct_blocks) { |
1da177e4 LT |
57 | offsets[n++] = i_block; |
58 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
59 | offsets[n++] = UFS_IND_BLOCK; | |
60 | offsets[n++] = i_block; | |
61 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
62 | offsets[n++] = UFS_DIND_BLOCK; | |
63 | offsets[n++] = i_block >> ptrs_bits; | |
64 | offsets[n++] = i_block & (ptrs - 1); | |
65 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
66 | offsets[n++] = UFS_TIND_BLOCK; | |
67 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
68 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
69 | offsets[n++] = i_block & (ptrs - 1); | |
70 | } else { | |
71 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
72 | } | |
73 | return n; | |
74 | } | |
75 | ||
724bb09f AV |
76 | typedef struct { |
77 | void *p; | |
78 | union { | |
79 | __fs32 key32; | |
80 | __fs64 key64; | |
81 | }; | |
82 | struct buffer_head *bh; | |
83 | } Indirect; | |
84 | ||
85 | static inline int grow_chain32(struct ufs_inode_info *ufsi, | |
86 | struct buffer_head *bh, __fs32 *v, | |
87 | Indirect *from, Indirect *to) | |
88 | { | |
89 | Indirect *p; | |
90 | unsigned seq; | |
91 | to->bh = bh; | |
92 | do { | |
93 | seq = read_seqbegin(&ufsi->meta_lock); | |
94 | to->key32 = *(__fs32 *)(to->p = v); | |
95 | for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) | |
96 | ; | |
97 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
98 | return (p > to); | |
99 | } | |
100 | ||
101 | static inline int grow_chain64(struct ufs_inode_info *ufsi, | |
102 | struct buffer_head *bh, __fs64 *v, | |
103 | Indirect *from, Indirect *to) | |
104 | { | |
105 | Indirect *p; | |
106 | unsigned seq; | |
107 | to->bh = bh; | |
108 | do { | |
109 | seq = read_seqbegin(&ufsi->meta_lock); | |
110 | to->key64 = *(__fs64 *)(to->p = v); | |
111 | for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) | |
112 | ; | |
113 | } while (read_seqretry(&ufsi->meta_lock, seq)); | |
114 | return (p > to); | |
115 | } | |
116 | ||
1da177e4 LT |
117 | /* |
118 | * Returns the location of the fragment from | |
25985edc | 119 | * the beginning of the filesystem. |
1da177e4 LT |
120 | */ |
121 | ||
4b7068c8 | 122 | static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
1da177e4 LT |
123 | { |
124 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
125 | struct super_block *sb = inode->i_sb; | |
126 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
127 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
128 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
724bb09f | 129 | Indirect chain[4], *q = chain; |
4b7068c8 | 130 | unsigned *p; |
1da177e4 | 131 | unsigned flags = UFS_SB(sb)->s_flags; |
724bb09f | 132 | u64 res = 0; |
1da177e4 | 133 | |
7256d819 AM |
134 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
135 | uspi->s_fpbshift, uspi->s_apbmask, | |
136 | (unsigned long long)mask); | |
1da177e4 LT |
137 | |
138 | if (depth == 0) | |
724bb09f | 139 | goto no_block; |
1da177e4 | 140 | |
724bb09f | 141 | again: |
1da177e4 LT |
142 | p = offsets; |
143 | ||
1da177e4 LT |
144 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
145 | goto ufs2; | |
146 | ||
724bb09f AV |
147 | if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) |
148 | goto changed; | |
149 | if (!q->key32) | |
150 | goto no_block; | |
1da177e4 | 151 | while (--depth) { |
724bb09f | 152 | __fs32 *ptr; |
1da177e4 | 153 | struct buffer_head *bh; |
4e3911f3 | 154 | unsigned n = *p++; |
1da177e4 | 155 | |
724bb09f AV |
156 | bh = sb_bread(sb, uspi->s_sbbase + |
157 | fs32_to_cpu(sb, q->key32) + (n>>shift)); | |
1da177e4 | 158 | if (!bh) |
724bb09f AV |
159 | goto no_block; |
160 | ptr = (__fs32 *)bh->b_data + (n & mask); | |
161 | if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) | |
162 | goto changed; | |
163 | if (!q->key32) | |
164 | goto no_block; | |
1da177e4 | 165 | } |
724bb09f AV |
166 | res = fs32_to_cpu(sb, q->key32); |
167 | goto found; | |
1da177e4 | 168 | |
724bb09f AV |
169 | ufs2: |
170 | if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) | |
171 | goto changed; | |
172 | if (!q->key64) | |
173 | goto no_block; | |
1da177e4 LT |
174 | |
175 | while (--depth) { | |
724bb09f | 176 | __fs64 *ptr; |
1da177e4 | 177 | struct buffer_head *bh; |
4e3911f3 | 178 | unsigned n = *p++; |
1da177e4 | 179 | |
724bb09f AV |
180 | bh = sb_bread(sb, uspi->s_sbbase + |
181 | fs64_to_cpu(sb, q->key64) + (n>>shift)); | |
1da177e4 | 182 | if (!bh) |
724bb09f AV |
183 | goto no_block; |
184 | ptr = (__fs64 *)bh->b_data + (n & mask); | |
185 | if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) | |
186 | goto changed; | |
187 | if (!q->key64) | |
188 | goto no_block; | |
189 | } | |
190 | res = fs64_to_cpu(sb, q->key64); | |
191 | found: | |
4b7068c8 | 192 | res += uspi->s_sbbase; |
724bb09f AV |
193 | no_block: |
194 | while (q > chain) { | |
195 | brelse(q->bh); | |
196 | q--; | |
1da177e4 | 197 | } |
724bb09f | 198 | return res; |
1da177e4 | 199 | |
724bb09f AV |
200 | changed: |
201 | while (q > chain) { | |
202 | brelse(q->bh); | |
203 | q--; | |
204 | } | |
205 | goto again; | |
1da177e4 LT |
206 | } |
207 | ||
0f3c1294 AV |
208 | /* |
209 | * Unpacking tails: we have a file with partial final block and | |
210 | * we had been asked to extend it. If the fragment being written | |
211 | * is within the same block, we need to extend the tail just to cover | |
212 | * that fragment. Otherwise the tail is extended to full block. | |
213 | * | |
214 | * Note that we might need to create a _new_ tail, but that will | |
215 | * be handled elsewhere; this is strictly for resizing old | |
216 | * ones. | |
217 | */ | |
218 | static bool | |
219 | ufs_extend_tail(struct inode *inode, u64 writes_to, | |
220 | int *err, struct page *locked_page) | |
221 | { | |
222 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
223 | struct super_block *sb = inode->i_sb; | |
224 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
225 | unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ | |
226 | unsigned block = ufs_fragstoblks(lastfrag); | |
227 | unsigned new_size; | |
228 | void *p; | |
229 | u64 tmp; | |
230 | ||
231 | if (writes_to < (lastfrag | uspi->s_fpbmask)) | |
232 | new_size = (writes_to & uspi->s_fpbmask) + 1; | |
233 | else | |
234 | new_size = uspi->s_fpb; | |
235 | ||
236 | p = ufs_get_direct_data_ptr(uspi, ufsi, block); | |
237 | tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), | |
238 | new_size, err, locked_page); | |
239 | return tmp != 0; | |
240 | } | |
241 | ||
022a6dc5 ED |
242 | /** |
243 | * ufs_inode_getfrag() - allocate new fragment(s) | |
edc023ca | 244 | * @inode: pointer to inode |
5336970b | 245 | * @index: number of block pointer within the inode's array. |
edc023ca | 246 | * @new_fragment: number of new allocated fragment(s) |
edc023ca FF |
247 | * @err: we set it if something wrong |
248 | * @phys: pointer to where we save physical number of new allocated fragments, | |
022a6dc5 | 249 | * NULL if we allocate not data(indirect blocks for example). |
edc023ca FF |
250 | * @new: we set it if we allocate new block |
251 | * @locked_page: for ufs_new_fragments() | |
022a6dc5 | 252 | */ |
177848a0 | 253 | static u64 |
5336970b AV |
254 | ufs_inode_getfrag(struct inode *inode, unsigned index, |
255 | sector_t new_fragment, int *err, | |
022a6dc5 | 256 | long *phys, int *new, struct page *locked_page) |
1da177e4 LT |
257 | { |
258 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
259 | struct super_block *sb = inode->i_sb; |
260 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
5336970b | 261 | u64 tmp, goal, lastfrag; |
0f3c1294 AV |
262 | unsigned nfrags = uspi->s_fpb; |
263 | void *p; | |
1da177e4 | 264 | |
1da177e4 LT |
265 | /* TODO : to be done for write support |
266 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
267 | goto ufs2; | |
268 | */ | |
269 | ||
5336970b | 270 | p = ufs_get_direct_data_ptr(uspi, ufsi, index); |
54fb996a | 271 | tmp = ufs_data_ptr_to_cpu(sb, p); |
0f3c1294 AV |
272 | if (tmp) |
273 | goto out; | |
54fb996a | 274 | |
1da177e4 | 275 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 276 | |
0f3c1294 AV |
277 | /* will that be a new tail? */ |
278 | if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) | |
279 | nfrags = (new_fragment & uspi->s_fpbmask) + 1; | |
280 | ||
281 | goal = 0; | |
5336970b | 282 | if (index) { |
0f3c1294 | 283 | goal = ufs_data_ptr_to_cpu(sb, |
5336970b | 284 | ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); |
0f3c1294 AV |
285 | if (goal) |
286 | goal += uspi->s_fpb; | |
1da177e4 | 287 | } |
5336970b | 288 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
0f3c1294 AV |
289 | goal, uspi->s_fpb, err, |
290 | phys != NULL ? locked_page : NULL); | |
291 | ||
1da177e4 | 292 | if (!tmp) { |
1da177e4 | 293 | *err = -ENOSPC; |
177848a0 | 294 | return 0; |
1da177e4 LT |
295 | } |
296 | ||
bbb3eb9d | 297 | if (phys) { |
1da177e4 LT |
298 | *err = 0; |
299 | *new = 1; | |
300 | } | |
1da177e4 LT |
301 | inode->i_ctime = CURRENT_TIME_SEC; |
302 | if (IS_SYNC(inode)) | |
303 | ufs_sync_inode (inode); | |
304 | mark_inode_dirty(inode); | |
bbb3eb9d | 305 | out: |
177848a0 | 306 | return tmp + uspi->s_sbbase; |
1da177e4 LT |
307 | |
308 | /* This part : To be implemented .... | |
309 | Required only for writing, not required for READ-ONLY. | |
310 | ufs2: | |
311 | ||
312 | u2_block = ufs_fragstoblks(fragment); | |
313 | u2_blockoff = ufs_fragnum(fragment); | |
314 | p = ufsi->i_u1.u2_i_data + block; | |
315 | goal = 0; | |
316 | ||
317 | repeat2: | |
318 | tmp = fs32_to_cpu(sb, *p); | |
319 | lastfrag = ufsi->i_lastfrag; | |
320 | ||
321 | */ | |
322 | } | |
323 | ||
022a6dc5 ED |
324 | /** |
325 | * ufs_inode_getblock() - allocate new block | |
edc023ca | 326 | * @inode: pointer to inode |
619cfac0 AV |
327 | * @ind_block: block number of the indirect block |
328 | * @index: number of pointer within the indirect block | |
edc023ca | 329 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 330 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca FF |
331 | * @err: see ufs_inode_getfrag() |
332 | * @phys: see ufs_inode_getfrag() | |
333 | * @new: see ufs_inode_getfrag() | |
334 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 | 335 | */ |
177848a0 | 336 | static u64 |
619cfac0 | 337 | ufs_inode_getblock(struct inode *inode, u64 ind_block, |
721435a7 | 338 | unsigned index, sector_t new_fragment, int *err, |
022a6dc5 | 339 | long *phys, int *new, struct page *locked_page) |
1da177e4 | 340 | { |
022a6dc5 ED |
341 | struct super_block *sb = inode->i_sb; |
342 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
619cfac0 | 343 | int shift = uspi->s_apbshift - uspi->s_fpbshift; |
721435a7 | 344 | u64 tmp = 0, goal; |
619cfac0 | 345 | struct buffer_head *bh; |
54fb996a | 346 | void *p; |
1da177e4 | 347 | |
619cfac0 AV |
348 | if (!ind_block) |
349 | return 0; | |
350 | ||
351 | bh = sb_bread(sb, ind_block + (index >> shift)); | |
352 | if (unlikely(!bh)) | |
353 | return 0; | |
354 | ||
355 | index &= uspi->s_apbmask >> uspi->s_fpbshift; | |
54fb996a | 356 | if (uspi->fs_magic == UFS2_MAGIC) |
721435a7 | 357 | p = (__fs64 *)bh->b_data + index; |
54fb996a | 358 | else |
721435a7 | 359 | p = (__fs32 *)bh->b_data + index; |
5a39c255 | 360 | |
54fb996a | 361 | tmp = ufs_data_ptr_to_cpu(sb, p); |
bbb3eb9d | 362 | if (tmp) |
5a39c255 | 363 | goto out; |
1da177e4 | 364 | |
721435a7 AV |
365 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
366 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : | |
367 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) | |
1da177e4 LT |
368 | goal = tmp + uspi->s_fpb; |
369 | else | |
370 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
371 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
372 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 373 | if (!tmp) |
1da177e4 | 374 | goto out; |
c9a27b5d | 375 | |
bbb3eb9d | 376 | if (new) |
1da177e4 | 377 | *new = 1; |
1da177e4 LT |
378 | |
379 | mark_buffer_dirty(bh); | |
380 | if (IS_SYNC(inode)) | |
381 | sync_dirty_buffer(bh); | |
382 | inode->i_ctime = CURRENT_TIME_SEC; | |
383 | mark_inode_dirty(inode); | |
384 | out: | |
385 | brelse (bh); | |
abf5d15f | 386 | UFSD("EXIT\n"); |
177848a0 AV |
387 | if (tmp) |
388 | tmp += uspi->s_sbbase; | |
389 | return tmp; | |
1da177e4 LT |
390 | } |
391 | ||
022a6dc5 | 392 | /** |
7422caa5 | 393 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 394 | * readpage, writepage and so on |
1da177e4 LT |
395 | */ |
396 | ||
010d331f | 397 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
398 | { |
399 | struct super_block * sb = inode->i_sb; | |
788257d6 AB |
400 | struct ufs_sb_info * sbi = UFS_SB(sb); |
401 | struct ufs_sb_private_info * uspi = sbi->s_uspi; | |
1da177e4 LT |
402 | struct buffer_head * bh; |
403 | int ret, err, new; | |
4b7068c8 AV |
404 | unsigned offsets[4]; |
405 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
5336970b | 406 | unsigned long phys; |
1da177e4 | 407 | u64 phys64 = 0; |
177848a0 | 408 | unsigned frag = fragment & uspi->s_fpbmask; |
010d331f | 409 | |
1da177e4 | 410 | if (!create) { |
4b7068c8 AV |
411 | phys64 = ufs_frag_map(inode, offsets, depth); |
412 | if (phys64) { | |
177848a0 | 413 | phys64 += frag; |
1da177e4 | 414 | map_bh(bh_result, sb, phys64); |
4b7068c8 | 415 | } |
1da177e4 LT |
416 | return 0; |
417 | } | |
418 | ||
419 | /* This code entered only while writing ....? */ | |
420 | ||
421 | err = -EIO; | |
422 | new = 0; | |
423 | ret = 0; | |
424 | bh = NULL; | |
425 | ||
724bb09f | 426 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 427 | |
abf5d15f | 428 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
71dd4284 | 429 | if (!depth) |
1da177e4 LT |
430 | goto abort_too_big; |
431 | ||
432 | err = 0; | |
0f3c1294 AV |
433 | |
434 | if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { | |
435 | unsigned lastfrag = UFS_I(inode)->i_lastfrag; | |
436 | unsigned tailfrags = lastfrag & uspi->s_fpbmask; | |
437 | if (tailfrags && fragment >= lastfrag) { | |
438 | if (!ufs_extend_tail(inode, fragment, | |
439 | &err, bh_result->b_page)) | |
440 | goto abort; | |
441 | } | |
442 | } | |
443 | ||
71dd4284 | 444 | if (depth == 1) { |
5336970b AV |
445 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
446 | &err, &phys, &new, bh_result->b_page); | |
4eeff4c9 AV |
447 | } else { |
448 | int i; | |
5336970b AV |
449 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
450 | &err, NULL, NULL, bh_result->b_page); | |
4eeff4c9 AV |
451 | for (i = 1; i < depth - 1; i++) |
452 | phys64 = ufs_inode_getblock(inode, phys64, offsets[i], | |
453 | fragment, &err, NULL, NULL, NULL); | |
454 | phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], | |
455 | fragment, &err, &phys, &new, bh_result->b_page); | |
1da177e4 | 456 | } |
4eeff4c9 | 457 | out: |
177848a0 AV |
458 | if (phys64) { |
459 | phys64 += frag; | |
460 | phys = phys64; | |
461 | } | |
1da177e4 LT |
462 | if (err) |
463 | goto abort; | |
464 | if (new) | |
465 | set_buffer_new(bh_result); | |
466 | map_bh(bh_result, sb, phys); | |
467 | abort: | |
724bb09f | 468 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
788257d6 | 469 | |
1da177e4 LT |
470 | return err; |
471 | ||
1da177e4 LT |
472 | abort_too_big: |
473 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
474 | goto abort; | |
475 | } | |
476 | ||
1da177e4 LT |
477 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
478 | { | |
479 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
480 | } | |
82b9d1d0 | 481 | |
1da177e4 LT |
482 | static int ufs_readpage(struct file *file, struct page *page) |
483 | { | |
484 | return block_read_full_page(page,ufs_getfrag_block); | |
485 | } | |
82b9d1d0 | 486 | |
f4e420dc | 487 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 488 | { |
6e1db88d | 489 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 490 | } |
82b9d1d0 | 491 | |
010d331f AV |
492 | static void ufs_truncate_blocks(struct inode *); |
493 | ||
83f6e371 MS |
494 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
495 | { | |
496 | struct inode *inode = mapping->host; | |
497 | ||
3b7a3a05 | 498 | if (to > inode->i_size) { |
7caef267 | 499 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
500 | ufs_truncate_blocks(inode); |
501 | } | |
83f6e371 MS |
502 | } |
503 | ||
82b9d1d0 NP |
504 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
505 | loff_t pos, unsigned len, unsigned flags, | |
506 | struct page **pagep, void **fsdata) | |
507 | { | |
155130a4 CH |
508 | int ret; |
509 | ||
510 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 511 | ufs_getfrag_block); |
83f6e371 MS |
512 | if (unlikely(ret)) |
513 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
514 | |
515 | return ret; | |
82b9d1d0 NP |
516 | } |
517 | ||
3b7a3a05 AV |
518 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
519 | loff_t pos, unsigned len, unsigned copied, | |
520 | struct page *page, void *fsdata) | |
521 | { | |
522 | int ret; | |
523 | ||
524 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
525 | if (ret < len) | |
526 | ufs_write_failed(mapping, pos + len); | |
527 | return ret; | |
528 | } | |
529 | ||
1da177e4 LT |
530 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
531 | { | |
532 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
533 | } | |
82b9d1d0 | 534 | |
f5e54d6e | 535 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
536 | .readpage = ufs_readpage, |
537 | .writepage = ufs_writepage, | |
82b9d1d0 | 538 | .write_begin = ufs_write_begin, |
3b7a3a05 | 539 | .write_end = ufs_write_end, |
1da177e4 LT |
540 | .bmap = ufs_bmap |
541 | }; | |
542 | ||
826843a3 ED |
543 | static void ufs_set_inode_ops(struct inode *inode) |
544 | { | |
545 | if (S_ISREG(inode->i_mode)) { | |
546 | inode->i_op = &ufs_file_inode_operations; | |
547 | inode->i_fop = &ufs_file_operations; | |
548 | inode->i_mapping->a_ops = &ufs_aops; | |
549 | } else if (S_ISDIR(inode->i_mode)) { | |
550 | inode->i_op = &ufs_dir_inode_operations; | |
551 | inode->i_fop = &ufs_dir_operations; | |
552 | inode->i_mapping->a_ops = &ufs_aops; | |
553 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 554 | if (!inode->i_blocks) { |
826843a3 | 555 | inode->i_op = &ufs_fast_symlink_inode_operations; |
4b8061a6 AV |
556 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
557 | } else { | |
311b9549 | 558 | inode->i_op = &ufs_symlink_inode_operations; |
826843a3 ED |
559 | inode->i_mapping->a_ops = &ufs_aops; |
560 | } | |
561 | } else | |
562 | init_special_inode(inode, inode->i_mode, | |
563 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
564 | } | |
565 | ||
07a0cfec | 566 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
567 | { |
568 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 569 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 570 | umode_t mode; |
1da177e4 LT |
571 | |
572 | /* | |
573 | * Copy data to the in-core inode. | |
574 | */ | |
575 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 576 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
07a0cfec | 577 | if (inode->i_nlink == 0) { |
1da177e4 | 578 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
579 | return -1; |
580 | } | |
010d331f | 581 | |
1da177e4 LT |
582 | /* |
583 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
584 | */ | |
72235465 EB |
585 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
586 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
587 | |
588 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
589 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
590 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
591 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
592 | inode->i_mtime.tv_nsec = 0; | |
593 | inode->i_atime.tv_nsec = 0; | |
594 | inode->i_ctime.tv_nsec = 0; | |
595 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 596 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 597 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
598 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
599 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 600 | |
010d331f | 601 | |
1da177e4 | 602 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
603 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
604 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 605 | } else { |
f33219b7 | 606 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
607 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
608 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 609 | } |
07a0cfec | 610 | return 0; |
05f225dc | 611 | } |
1da177e4 | 612 | |
07a0cfec | 613 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
614 | { |
615 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
616 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 617 | umode_t mode; |
1da177e4 | 618 | |
abf5d15f | 619 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
620 | /* |
621 | * Copy data to the in-core inode. | |
622 | */ | |
623 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 624 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
07a0cfec | 625 | if (inode->i_nlink == 0) { |
1da177e4 | 626 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
07a0cfec ED |
627 | return -1; |
628 | } | |
1da177e4 LT |
629 | |
630 | /* | |
631 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
632 | */ | |
72235465 EB |
633 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
634 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
635 | |
636 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
637 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
638 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
639 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
640 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
641 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
642 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 643 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 644 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 645 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
646 | /* |
647 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
648 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
649 | */ | |
1da177e4 LT |
650 | |
651 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
652 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
653 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 654 | } else { |
f33219b7 | 655 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
656 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
657 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 658 | } |
07a0cfec | 659 | return 0; |
05f225dc ED |
660 | } |
661 | ||
b55c460d | 662 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 663 | { |
b55c460d DH |
664 | struct ufs_inode_info *ufsi; |
665 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 666 | struct buffer_head * bh; |
b55c460d | 667 | struct inode *inode; |
07a0cfec | 668 | int err; |
05f225dc | 669 | |
b55c460d | 670 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 671 | |
b55c460d | 672 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 673 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
674 | ino); |
675 | return ERR_PTR(-EIO); | |
05f225dc ED |
676 | } |
677 | ||
b55c460d DH |
678 | inode = iget_locked(sb, ino); |
679 | if (!inode) | |
680 | return ERR_PTR(-ENOMEM); | |
681 | if (!(inode->i_state & I_NEW)) | |
682 | return inode; | |
683 | ||
684 | ufsi = UFS_I(inode); | |
685 | ||
05f225dc ED |
686 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
687 | if (!bh) { | |
688 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
689 | inode->i_ino); | |
690 | goto bad_inode; | |
691 | } | |
692 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
693 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
694 | ||
07a0cfec ED |
695 | err = ufs2_read_inode(inode, |
696 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
697 | } else { |
698 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
699 | ||
07a0cfec ED |
700 | err = ufs1_read_inode(inode, |
701 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
702 | } |
703 | ||
07a0cfec ED |
704 | if (err) |
705 | goto bad_inode; | |
05f225dc ED |
706 | inode->i_version++; |
707 | ufsi->i_lastfrag = | |
708 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
709 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
710 | ufsi->i_osync = 0; |
711 | ||
826843a3 | 712 | ufs_set_inode_ops(inode); |
1da177e4 LT |
713 | |
714 | brelse(bh); | |
715 | ||
abf5d15f | 716 | UFSD("EXIT\n"); |
b55c460d DH |
717 | unlock_new_inode(inode); |
718 | return inode; | |
05f225dc ED |
719 | |
720 | bad_inode: | |
b55c460d DH |
721 | iget_failed(inode); |
722 | return ERR_PTR(-EIO); | |
1da177e4 LT |
723 | } |
724 | ||
3313e292 | 725 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 726 | { |
3313e292 ED |
727 | struct super_block *sb = inode->i_sb; |
728 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
729 | |
730 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
731 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
732 | ||
72235465 EB |
733 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
734 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 735 | |
1da177e4 LT |
736 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
737 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
738 | ufs_inode->ui_atime.tv_usec = 0; | |
739 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
740 | ufs_inode->ui_ctime.tv_usec = 0; | |
741 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
742 | ufs_inode->ui_mtime.tv_usec = 0; | |
743 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
744 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 745 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 746 | |
3313e292 | 747 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
748 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
749 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
750 | } | |
751 | ||
752 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
753 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
754 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
755 | } else if (inode->i_blocks) { | |
f33219b7 DG |
756 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
757 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
758 | } |
759 | else { | |
f33219b7 DG |
760 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
761 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
762 | } |
763 | ||
764 | if (!inode->i_nlink) | |
765 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
766 | } |
767 | ||
768 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
769 | { | |
770 | struct super_block *sb = inode->i_sb; | |
771 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
772 | |
773 | UFSD("ENTER\n"); | |
774 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
775 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
776 | ||
72235465 EB |
777 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
778 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
779 | |
780 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
781 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
782 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
783 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
784 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
785 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
786 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
787 | |
788 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
789 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
790 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
791 | ||
792 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
793 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
794 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
795 | } else if (inode->i_blocks) { | |
f33219b7 DG |
796 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
797 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 798 | } else { |
f33219b7 DG |
799 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
800 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
801 | } |
802 | ||
803 | if (!inode->i_nlink) | |
804 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
805 | UFSD("EXIT\n"); | |
806 | } | |
807 | ||
808 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
809 | { | |
810 | struct super_block *sb = inode->i_sb; | |
811 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
812 | struct buffer_head * bh; | |
813 | ||
814 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
815 | ||
816 | if (inode->i_ino < UFS_ROOTINO || | |
817 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
818 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
819 | return -1; | |
820 | } | |
821 | ||
822 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
823 | if (!bh) { | |
824 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
825 | return -1; | |
826 | } | |
827 | if (uspi->fs_magic == UFS2_MAGIC) { | |
828 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
829 | ||
830 | ufs2_update_inode(inode, | |
831 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
832 | } else { | |
833 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
834 | ||
835 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
836 | } | |
010d331f | 837 | |
1da177e4 LT |
838 | mark_buffer_dirty(bh); |
839 | if (do_sync) | |
840 | sync_dirty_buffer(bh); | |
841 | brelse (bh); | |
010d331f | 842 | |
abf5d15f | 843 | UFSD("EXIT\n"); |
1da177e4 LT |
844 | return 0; |
845 | } | |
846 | ||
a9185b41 | 847 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 848 | { |
f3e0f3da | 849 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
850 | } |
851 | ||
852 | int ufs_sync_inode (struct inode *inode) | |
853 | { | |
854 | return ufs_update_inode (inode, 1); | |
855 | } | |
856 | ||
58e8268c | 857 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 858 | { |
58e8268c AV |
859 | int want_delete = 0; |
860 | ||
861 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
862 | want_delete = 1; | |
10e5dce0 | 863 | |
91b0abe3 | 864 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 865 | if (want_delete) { |
58e8268c | 866 | inode->i_size = 0; |
d622f167 AV |
867 | if (inode->i_blocks) |
868 | ufs_truncate_blocks(inode); | |
58e8268c AV |
869 | } |
870 | ||
871 | invalidate_inode_buffers(inode); | |
dbd5768f | 872 | clear_inode(inode); |
58e8268c | 873 | |
f3e0f3da | 874 | if (want_delete) |
9ef7db7f | 875 | ufs_free_inode(inode); |
1da177e4 | 876 | } |
010d331f | 877 | |
a138b4b6 AV |
878 | struct to_free { |
879 | struct inode *inode; | |
880 | u64 to; | |
881 | unsigned count; | |
882 | }; | |
883 | ||
884 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
885 | { | |
886 | if (ctx->count && ctx->to != from) { | |
887 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
888 | ctx->count = 0; | |
889 | } | |
890 | ctx->count += count; | |
891 | ctx->to = from + count; | |
892 | } | |
893 | ||
010d331f AV |
894 | #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) |
895 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) | |
896 | ||
897 | static void ufs_trunc_direct(struct inode *inode) | |
898 | { | |
899 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
900 | struct super_block * sb; | |
901 | struct ufs_sb_private_info * uspi; | |
902 | void *p; | |
903 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 904 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
905 | unsigned i, tmp; |
906 | ||
907 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
908 | ||
909 | sb = inode->i_sb; | |
910 | uspi = UFS_SB(sb)->s_uspi; | |
911 | ||
010d331f AV |
912 | frag1 = DIRECT_FRAGMENT; |
913 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
914 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
915 | frag3 = frag4 & ~uspi->s_fpbmask; | |
916 | block1 = block2 = 0; | |
917 | if (frag2 > frag3) { | |
918 | frag2 = frag4; | |
919 | frag3 = frag4 = 0; | |
920 | } else if (frag2 < frag3) { | |
921 | block1 = ufs_fragstoblks (frag2); | |
922 | block2 = ufs_fragstoblks (frag3); | |
923 | } | |
924 | ||
925 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
926 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
927 | (unsigned long long)frag1, (unsigned long long)frag2, | |
928 | (unsigned long long)block1, (unsigned long long)block2, | |
929 | (unsigned long long)frag3, (unsigned long long)frag4); | |
930 | ||
931 | if (frag1 >= frag2) | |
932 | goto next1; | |
933 | ||
934 | /* | |
935 | * Free first free fragments | |
936 | */ | |
937 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
938 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
939 | if (!tmp ) | |
940 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
941 | frag2 -= frag1; | |
942 | frag1 = ufs_fragnum (frag1); | |
943 | ||
944 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
945 | |
946 | next1: | |
947 | /* | |
948 | * Free whole blocks | |
949 | */ | |
950 | for (i = block1 ; i < block2; i++) { | |
951 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
952 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
953 | if (!tmp) | |
954 | continue; | |
955 | write_seqlock(&ufsi->meta_lock); | |
956 | ufs_data_ptr_clear(uspi, p); | |
957 | write_sequnlock(&ufsi->meta_lock); | |
958 | ||
a138b4b6 | 959 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
960 | } |
961 | ||
a138b4b6 | 962 | free_data(&ctx, 0, 0); |
010d331f AV |
963 | |
964 | if (frag3 >= frag4) | |
965 | goto next3; | |
966 | ||
967 | /* | |
968 | * Free last free fragments | |
969 | */ | |
970 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
971 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
972 | if (!tmp ) | |
973 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
974 | frag4 = ufs_fragnum (frag4); | |
975 | write_seqlock(&ufsi->meta_lock); | |
976 | ufs_data_ptr_clear(uspi, p); | |
977 | write_sequnlock(&ufsi->meta_lock); | |
978 | ||
979 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
980 | next3: |
981 | ||
982 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
983 | } | |
984 | ||
163073db | 985 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
986 | { |
987 | struct super_block *sb = inode->i_sb; | |
988 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 989 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
990 | unsigned i; |
991 | ||
163073db | 992 | if (!ubh) |
6d1ebbca | 993 | return; |
6d1ebbca AV |
994 | |
995 | if (--depth) { | |
163073db AV |
996 | for (i = 0; i < uspi->s_apb; i++) { |
997 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
998 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 999 | if (block) |
163073db | 1000 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
1001 | } |
1002 | } else { | |
1003 | struct to_free ctx = {.inode = inode}; | |
1004 | ||
1005 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
1006 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1007 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 1008 | if (block) |
163073db | 1009 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
1010 | } |
1011 | free_data(&ctx, 0, 0); | |
1012 | } | |
6d1ebbca AV |
1013 | |
1014 | ubh_bforget(ubh); | |
163073db | 1015 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1016 | } |
1017 | ||
7b4e4f7f | 1018 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1019 | { |
7bad5939 AV |
1020 | struct super_block *sb = inode->i_sb; |
1021 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1022 | unsigned i; |
010d331f | 1023 | |
9e0fbbde | 1024 | if (--depth) { |
7b4e4f7f | 1025 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1026 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1027 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1028 | if (block) { | |
1029 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1030 | ufs_data_ptr_clear(uspi, p); | |
1031 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1032 | ubh_mark_buffer_dirty(ubh); | |
1033 | free_full_branch(inode, block, depth); | |
1034 | } | |
a9657423 | 1035 | } |
9e0fbbde | 1036 | } else { |
a138b4b6 | 1037 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1038 | |
1039 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1040 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1041 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1042 | if (block) { | |
1043 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1044 | ufs_data_ptr_clear(uspi, p); | |
1045 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1046 | ubh_mark_buffer_dirty(ubh); | |
1047 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1048 | } |
9e0fbbde | 1049 | } |
a138b4b6 | 1050 | free_data(&ctx, 0, 0); |
010d331f | 1051 | } |
9e0fbbde AV |
1052 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1053 | ubh_sync_block(ubh); | |
1054 | ubh_brelse(ubh); | |
010d331f AV |
1055 | } |
1056 | ||
1057 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1058 | { | |
1059 | int err = 0; | |
1060 | struct super_block *sb = inode->i_sb; | |
1061 | struct address_space *mapping = inode->i_mapping; | |
1062 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1063 | unsigned i, end; | |
1064 | sector_t lastfrag; | |
1065 | struct page *lastpage; | |
1066 | struct buffer_head *bh; | |
1067 | u64 phys64; | |
1068 | ||
1069 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1070 | ||
1071 | if (!lastfrag) | |
1072 | goto out; | |
1073 | ||
1074 | lastfrag--; | |
1075 | ||
1076 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
1077 | (PAGE_CACHE_SHIFT - inode->i_blkbits)); | |
1078 | if (IS_ERR(lastpage)) { | |
1079 | err = -EIO; | |
1080 | goto out; | |
1081 | } | |
1082 | ||
1083 | end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); | |
1084 | bh = page_buffers(lastpage); | |
1085 | for (i = 0; i < end; ++i) | |
1086 | bh = bh->b_this_page; | |
1087 | ||
1088 | ||
1089 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1090 | ||
1091 | if (unlikely(err)) | |
1092 | goto out_unlock; | |
1093 | ||
1094 | if (buffer_new(bh)) { | |
1095 | clear_buffer_new(bh); | |
1096 | unmap_underlying_metadata(bh->b_bdev, | |
1097 | bh->b_blocknr); | |
1098 | /* | |
1099 | * we do not zeroize fragment, because of | |
1100 | * if it maped to hole, it already contains zeroes | |
1101 | */ | |
1102 | set_buffer_uptodate(bh); | |
1103 | mark_buffer_dirty(bh); | |
1104 | set_page_dirty(lastpage); | |
1105 | } | |
1106 | ||
1107 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1108 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1109 | phys64 = bh->b_blocknr + 1; | |
1110 | for (i = 0; i < end; ++i) { | |
1111 | bh = sb_getblk(sb, i + phys64); | |
1112 | lock_buffer(bh); | |
1113 | memset(bh->b_data, 0, sb->s_blocksize); | |
1114 | set_buffer_uptodate(bh); | |
1115 | mark_buffer_dirty(bh); | |
1116 | unlock_buffer(bh); | |
1117 | sync_dirty_buffer(bh); | |
1118 | brelse(bh); | |
1119 | } | |
1120 | } | |
1121 | out_unlock: | |
1122 | ufs_put_locked_page(lastpage); | |
1123 | out: | |
1124 | return err; | |
1125 | } | |
1126 | ||
1127 | static void __ufs_truncate_blocks(struct inode *inode) | |
1128 | { | |
1129 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1130 | struct super_block *sb = inode->i_sb; | |
1131 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1132 | unsigned offsets[4]; |
31cd043e | 1133 | int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); |
6775e24d | 1134 | int depth2; |
42432739 | 1135 | unsigned i; |
7b4e4f7f AV |
1136 | struct ufs_buffer_head *ubh[3]; |
1137 | void *p; | |
1138 | u64 block; | |
6775e24d AV |
1139 | |
1140 | if (!depth) | |
1141 | return; | |
1142 | ||
1143 | /* find the last non-zero in offsets[] */ | |
1144 | for (depth2 = depth - 1; depth2; depth2--) | |
1145 | if (offsets[depth2]) | |
1146 | break; | |
010d331f AV |
1147 | |
1148 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1149 | if (depth == 1) { |
31cd043e | 1150 | ufs_trunc_direct(inode); |
42432739 AV |
1151 | offsets[0] = UFS_IND_BLOCK; |
1152 | } else { | |
7b4e4f7f AV |
1153 | /* get the blocks that should be partially emptied */ |
1154 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); | |
1155 | for (i = 0; i < depth2; i++) { | |
1156 | offsets[i]++; /* next branch is fully freed */ | |
1157 | block = ufs_data_ptr_to_cpu(sb, p); | |
1158 | if (!block) | |
1159 | break; | |
1160 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1161 | if (!ubh[i]) { | |
1162 | write_seqlock(&ufsi->meta_lock); | |
1163 | ufs_data_ptr_clear(uspi, p); | |
1164 | write_sequnlock(&ufsi->meta_lock); | |
1165 | break; | |
1166 | } | |
1167 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); | |
1168 | } | |
f53bd142 | 1169 | while (i--) |
7b4e4f7f | 1170 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1171 | } |
1172 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1173 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1174 | block = ufs_data_ptr_to_cpu(sb, p); | |
1175 | if (block) { | |
1176 | write_seqlock(&ufsi->meta_lock); | |
1177 | ufs_data_ptr_clear(uspi, p); | |
1178 | write_sequnlock(&ufsi->meta_lock); | |
1179 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1180 | } | |
31cd043e | 1181 | } |
010d331f | 1182 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
b6eede0e | 1183 | mark_inode_dirty(inode); |
010d331f AV |
1184 | mutex_unlock(&ufsi->truncate_mutex); |
1185 | } | |
1186 | ||
1187 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1188 | { | |
1189 | int err = 0; | |
1190 | ||
1191 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1192 | inode->i_ino, (unsigned long long)size, | |
1193 | (unsigned long long)i_size_read(inode)); | |
1194 | ||
1195 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1196 | S_ISLNK(inode->i_mode))) | |
1197 | return -EINVAL; | |
1198 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1199 | return -EPERM; | |
1200 | ||
1201 | err = ufs_alloc_lastblock(inode, size); | |
1202 | ||
1203 | if (err) | |
1204 | goto out; | |
1205 | ||
1206 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1207 | ||
1208 | truncate_setsize(inode, size); | |
1209 | ||
1210 | __ufs_truncate_blocks(inode); | |
1211 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
1212 | mark_inode_dirty(inode); | |
1213 | out: | |
1214 | UFSD("EXIT: err %d\n", err); | |
1215 | return err; | |
1216 | } | |
1217 | ||
1218 | void ufs_truncate_blocks(struct inode *inode) | |
1219 | { | |
1220 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1221 | S_ISLNK(inode->i_mode))) | |
1222 | return; | |
1223 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1224 | return; | |
1225 | __ufs_truncate_blocks(inode); | |
1226 | } | |
1227 | ||
1228 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) | |
1229 | { | |
1230 | struct inode *inode = d_inode(dentry); | |
1231 | unsigned int ia_valid = attr->ia_valid; | |
1232 | int error; | |
1233 | ||
1234 | error = inode_change_ok(inode, attr); | |
1235 | if (error) | |
1236 | return error; | |
1237 | ||
1238 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1239 | error = ufs_truncate(inode, attr->ia_size); | |
1240 | if (error) | |
1241 | return error; | |
1242 | } | |
1243 | ||
1244 | setattr_copy(inode, attr); | |
1245 | mark_inode_dirty(inode); | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | const struct inode_operations ufs_file_inode_operations = { | |
1250 | .setattr = ufs_setattr, | |
1251 | }; |