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 | ||
7c0f6ba6 | 28 | #include <linux/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), | |
940ef1a0 AV |
238 | new_size - (lastfrag & uspi->s_fpbmask), err, |
239 | locked_page); | |
0f3c1294 AV |
240 | return tmp != 0; |
241 | } | |
242 | ||
022a6dc5 ED |
243 | /** |
244 | * ufs_inode_getfrag() - allocate new fragment(s) | |
edc023ca | 245 | * @inode: pointer to inode |
5336970b | 246 | * @index: number of block pointer within the inode's array. |
edc023ca | 247 | * @new_fragment: number of new allocated fragment(s) |
edc023ca | 248 | * @err: we set it if something wrong |
edc023ca FF |
249 | * @new: we set it if we allocate new block |
250 | * @locked_page: for ufs_new_fragments() | |
022a6dc5 | 251 | */ |
177848a0 | 252 | static u64 |
5336970b AV |
253 | ufs_inode_getfrag(struct inode *inode, unsigned index, |
254 | sector_t new_fragment, int *err, | |
4e317ce7 | 255 | int *new, struct page *locked_page) |
1da177e4 LT |
256 | { |
257 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
258 | struct super_block *sb = inode->i_sb; |
259 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
5336970b | 260 | u64 tmp, goal, lastfrag; |
0f3c1294 AV |
261 | unsigned nfrags = uspi->s_fpb; |
262 | void *p; | |
1da177e4 | 263 | |
1da177e4 LT |
264 | /* TODO : to be done for write support |
265 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
266 | goto ufs2; | |
267 | */ | |
268 | ||
5336970b | 269 | p = ufs_get_direct_data_ptr(uspi, ufsi, index); |
54fb996a | 270 | tmp = ufs_data_ptr_to_cpu(sb, p); |
0f3c1294 AV |
271 | if (tmp) |
272 | goto out; | |
54fb996a | 273 | |
1da177e4 | 274 | lastfrag = ufsi->i_lastfrag; |
1da177e4 | 275 | |
0f3c1294 AV |
276 | /* will that be a new tail? */ |
277 | if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) | |
278 | nfrags = (new_fragment & uspi->s_fpbmask) + 1; | |
279 | ||
280 | goal = 0; | |
5336970b | 281 | if (index) { |
0f3c1294 | 282 | goal = ufs_data_ptr_to_cpu(sb, |
5336970b | 283 | ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); |
0f3c1294 AV |
284 | if (goal) |
285 | goal += uspi->s_fpb; | |
1da177e4 | 286 | } |
5336970b | 287 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
8785d84d | 288 | goal, nfrags, err, locked_page); |
0f3c1294 | 289 | |
1da177e4 | 290 | if (!tmp) { |
1da177e4 | 291 | *err = -ENOSPC; |
177848a0 | 292 | return 0; |
1da177e4 LT |
293 | } |
294 | ||
4e317ce7 | 295 | if (new) |
1da177e4 | 296 | *new = 1; |
02027d42 | 297 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
298 | if (IS_SYNC(inode)) |
299 | ufs_sync_inode (inode); | |
300 | mark_inode_dirty(inode); | |
bbb3eb9d | 301 | out: |
177848a0 | 302 | return tmp + uspi->s_sbbase; |
1da177e4 LT |
303 | |
304 | /* This part : To be implemented .... | |
305 | Required only for writing, not required for READ-ONLY. | |
306 | ufs2: | |
307 | ||
308 | u2_block = ufs_fragstoblks(fragment); | |
309 | u2_blockoff = ufs_fragnum(fragment); | |
310 | p = ufsi->i_u1.u2_i_data + block; | |
311 | goal = 0; | |
312 | ||
313 | repeat2: | |
314 | tmp = fs32_to_cpu(sb, *p); | |
315 | lastfrag = ufsi->i_lastfrag; | |
316 | ||
317 | */ | |
318 | } | |
319 | ||
022a6dc5 ED |
320 | /** |
321 | * ufs_inode_getblock() - allocate new block | |
edc023ca | 322 | * @inode: pointer to inode |
619cfac0 AV |
323 | * @ind_block: block number of the indirect block |
324 | * @index: number of pointer within the indirect block | |
edc023ca | 325 | * @new_fragment: number of new allocated fragment |
022a6dc5 | 326 | * (block will hold this fragment and also uspi->s_fpb-1) |
edc023ca | 327 | * @err: see ufs_inode_getfrag() |
edc023ca FF |
328 | * @new: see ufs_inode_getfrag() |
329 | * @locked_page: see ufs_inode_getfrag() | |
022a6dc5 | 330 | */ |
177848a0 | 331 | static u64 |
619cfac0 | 332 | ufs_inode_getblock(struct inode *inode, u64 ind_block, |
721435a7 | 333 | unsigned index, sector_t new_fragment, int *err, |
4e317ce7 | 334 | int *new, struct page *locked_page) |
1da177e4 | 335 | { |
022a6dc5 ED |
336 | struct super_block *sb = inode->i_sb; |
337 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
619cfac0 | 338 | int shift = uspi->s_apbshift - uspi->s_fpbshift; |
721435a7 | 339 | u64 tmp = 0, goal; |
619cfac0 | 340 | struct buffer_head *bh; |
54fb996a | 341 | void *p; |
1da177e4 | 342 | |
619cfac0 AV |
343 | if (!ind_block) |
344 | return 0; | |
345 | ||
346 | bh = sb_bread(sb, ind_block + (index >> shift)); | |
5fbfb238 AV |
347 | if (unlikely(!bh)) { |
348 | *err = -EIO; | |
619cfac0 | 349 | return 0; |
5fbfb238 | 350 | } |
619cfac0 AV |
351 | |
352 | index &= uspi->s_apbmask >> uspi->s_fpbshift; | |
54fb996a | 353 | if (uspi->fs_magic == UFS2_MAGIC) |
721435a7 | 354 | p = (__fs64 *)bh->b_data + index; |
54fb996a | 355 | else |
721435a7 | 356 | p = (__fs32 *)bh->b_data + index; |
5a39c255 | 357 | |
54fb996a | 358 | tmp = ufs_data_ptr_to_cpu(sb, p); |
bbb3eb9d | 359 | if (tmp) |
5a39c255 | 360 | goto out; |
1da177e4 | 361 | |
721435a7 AV |
362 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
363 | (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : | |
364 | (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) | |
1da177e4 LT |
365 | goal = tmp + uspi->s_fpb; |
366 | else | |
367 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
368 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
369 | uspi->s_fpb, err, locked_page); | |
5a39c255 | 370 | if (!tmp) |
1da177e4 | 371 | goto out; |
c9a27b5d | 372 | |
bbb3eb9d | 373 | if (new) |
1da177e4 | 374 | *new = 1; |
1da177e4 LT |
375 | |
376 | mark_buffer_dirty(bh); | |
377 | if (IS_SYNC(inode)) | |
378 | sync_dirty_buffer(bh); | |
02027d42 | 379 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
380 | mark_inode_dirty(inode); |
381 | out: | |
382 | brelse (bh); | |
abf5d15f | 383 | UFSD("EXIT\n"); |
177848a0 AV |
384 | if (tmp) |
385 | tmp += uspi->s_sbbase; | |
386 | return tmp; | |
1da177e4 LT |
387 | } |
388 | ||
022a6dc5 | 389 | /** |
7422caa5 | 390 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
022a6dc5 | 391 | * readpage, writepage and so on |
1da177e4 LT |
392 | */ |
393 | ||
010d331f | 394 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 | 395 | { |
0385f1f9 AV |
396 | struct super_block *sb = inode->i_sb; |
397 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
398 | int err = 0, new = 0; | |
4b7068c8 AV |
399 | unsigned offsets[4]; |
400 | int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); | |
1da177e4 | 401 | u64 phys64 = 0; |
177848a0 | 402 | unsigned frag = fragment & uspi->s_fpbmask; |
010d331f | 403 | |
09bf4f5b AV |
404 | phys64 = ufs_frag_map(inode, offsets, depth); |
405 | if (!create) | |
406 | goto done; | |
1da177e4 | 407 | |
09bf4f5b AV |
408 | if (phys64) { |
409 | if (fragment >= UFS_NDIR_FRAGMENT) | |
410 | goto done; | |
411 | read_seqlock_excl(&UFS_I(inode)->meta_lock); | |
412 | if (fragment < UFS_I(inode)->i_lastfrag) { | |
413 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
414 | goto done; | |
415 | } | |
416 | read_sequnlock_excl(&UFS_I(inode)->meta_lock); | |
417 | } | |
1da177e4 LT |
418 | /* This code entered only while writing ....? */ |
419 | ||
724bb09f | 420 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 421 | |
abf5d15f | 422 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
0385f1f9 AV |
423 | if (unlikely(!depth)) { |
424 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
425 | err = -EIO; | |
426 | goto out; | |
427 | } | |
0f3c1294 AV |
428 | |
429 | if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { | |
430 | unsigned lastfrag = UFS_I(inode)->i_lastfrag; | |
431 | unsigned tailfrags = lastfrag & uspi->s_fpbmask; | |
432 | if (tailfrags && fragment >= lastfrag) { | |
433 | if (!ufs_extend_tail(inode, fragment, | |
434 | &err, bh_result->b_page)) | |
0385f1f9 | 435 | goto out; |
0f3c1294 AV |
436 | } |
437 | } | |
438 | ||
71dd4284 | 439 | if (depth == 1) { |
5336970b | 440 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 441 | &err, &new, bh_result->b_page); |
4eeff4c9 AV |
442 | } else { |
443 | int i; | |
5336970b | 444 | phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, |
4e317ce7 | 445 | &err, NULL, NULL); |
4eeff4c9 AV |
446 | for (i = 1; i < depth - 1; i++) |
447 | phys64 = ufs_inode_getblock(inode, phys64, offsets[i], | |
4e317ce7 | 448 | fragment, &err, NULL, NULL); |
4eeff4c9 | 449 | phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], |
4e317ce7 | 450 | fragment, &err, &new, bh_result->b_page); |
1da177e4 | 451 | } |
0385f1f9 | 452 | out: |
177848a0 AV |
453 | if (phys64) { |
454 | phys64 += frag; | |
0385f1f9 AV |
455 | map_bh(bh_result, sb, phys64); |
456 | if (new) | |
457 | set_buffer_new(bh_result); | |
177848a0 | 458 | } |
724bb09f | 459 | mutex_unlock(&UFS_I(inode)->truncate_mutex); |
1da177e4 | 460 | return err; |
09bf4f5b AV |
461 | |
462 | done: | |
463 | if (phys64) | |
464 | map_bh(bh_result, sb, phys64 + frag); | |
465 | return 0; | |
1da177e4 LT |
466 | } |
467 | ||
1da177e4 LT |
468 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
469 | { | |
470 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
471 | } | |
82b9d1d0 | 472 | |
1da177e4 LT |
473 | static int ufs_readpage(struct file *file, struct page *page) |
474 | { | |
475 | return block_read_full_page(page,ufs_getfrag_block); | |
476 | } | |
82b9d1d0 | 477 | |
f4e420dc | 478 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 479 | { |
6e1db88d | 480 | return __block_write_begin(page, pos, len, ufs_getfrag_block); |
1da177e4 | 481 | } |
82b9d1d0 | 482 | |
010d331f AV |
483 | static void ufs_truncate_blocks(struct inode *); |
484 | ||
83f6e371 MS |
485 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
486 | { | |
487 | struct inode *inode = mapping->host; | |
488 | ||
3b7a3a05 | 489 | if (to > inode->i_size) { |
7caef267 | 490 | truncate_pagecache(inode, inode->i_size); |
3b7a3a05 AV |
491 | ufs_truncate_blocks(inode); |
492 | } | |
83f6e371 MS |
493 | } |
494 | ||
82b9d1d0 NP |
495 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
496 | loff_t pos, unsigned len, unsigned flags, | |
497 | struct page **pagep, void **fsdata) | |
498 | { | |
155130a4 CH |
499 | int ret; |
500 | ||
501 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 502 | ufs_getfrag_block); |
83f6e371 MS |
503 | if (unlikely(ret)) |
504 | ufs_write_failed(mapping, pos + len); | |
155130a4 CH |
505 | |
506 | return ret; | |
82b9d1d0 NP |
507 | } |
508 | ||
3b7a3a05 AV |
509 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
510 | loff_t pos, unsigned len, unsigned copied, | |
511 | struct page *page, void *fsdata) | |
512 | { | |
513 | int ret; | |
514 | ||
515 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); | |
516 | if (ret < len) | |
517 | ufs_write_failed(mapping, pos + len); | |
518 | return ret; | |
519 | } | |
520 | ||
1da177e4 LT |
521 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
522 | { | |
523 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
524 | } | |
82b9d1d0 | 525 | |
f5e54d6e | 526 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
527 | .readpage = ufs_readpage, |
528 | .writepage = ufs_writepage, | |
82b9d1d0 | 529 | .write_begin = ufs_write_begin, |
3b7a3a05 | 530 | .write_end = ufs_write_end, |
1da177e4 LT |
531 | .bmap = ufs_bmap |
532 | }; | |
533 | ||
826843a3 ED |
534 | static void ufs_set_inode_ops(struct inode *inode) |
535 | { | |
536 | if (S_ISREG(inode->i_mode)) { | |
537 | inode->i_op = &ufs_file_inode_operations; | |
538 | inode->i_fop = &ufs_file_operations; | |
539 | inode->i_mapping->a_ops = &ufs_aops; | |
540 | } else if (S_ISDIR(inode->i_mode)) { | |
541 | inode->i_op = &ufs_dir_inode_operations; | |
542 | inode->i_fop = &ufs_dir_operations; | |
543 | inode->i_mapping->a_ops = &ufs_aops; | |
544 | } else if (S_ISLNK(inode->i_mode)) { | |
4b8061a6 | 545 | if (!inode->i_blocks) { |
4b8061a6 | 546 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
9cdce3c0 | 547 | inode->i_op = &simple_symlink_inode_operations; |
4b8061a6 | 548 | } else { |
826843a3 | 549 | inode->i_mapping->a_ops = &ufs_aops; |
9cdce3c0 | 550 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 551 | inode_nohighmem(inode); |
826843a3 ED |
552 | } |
553 | } else | |
554 | init_special_inode(inode, inode->i_mode, | |
555 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
556 | } | |
557 | ||
07a0cfec | 558 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
559 | { |
560 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 561 | struct super_block *sb = inode->i_sb; |
6a9a06d9 | 562 | umode_t mode; |
1da177e4 LT |
563 | |
564 | /* | |
565 | * Copy data to the in-core inode. | |
566 | */ | |
567 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
bfe86848 | 568 | set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); |
c0ef65d2 AV |
569 | if (inode->i_nlink == 0) |
570 | return -ESTALE; | |
010d331f | 571 | |
1da177e4 LT |
572 | /* |
573 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
574 | */ | |
72235465 EB |
575 | i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); |
576 | i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); | |
1da177e4 LT |
577 | |
578 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
23ac7cba AV |
579 | inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); |
580 | inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
581 | inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
1da177e4 LT |
582 | inode->i_mtime.tv_nsec = 0; |
583 | inode->i_atime.tv_nsec = 0; | |
584 | inode->i_ctime.tv_nsec = 0; | |
585 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 586 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 587 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
588 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
589 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 590 | |
010d331f | 591 | |
1da177e4 | 592 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
f33219b7 DG |
593 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
594 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
dd187a26 | 595 | } else { |
f33219b7 | 596 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
b12903f1 DG |
597 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
598 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 599 | } |
07a0cfec | 600 | return 0; |
05f225dc | 601 | } |
1da177e4 | 602 | |
07a0cfec | 603 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
05f225dc ED |
604 | { |
605 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
606 | struct super_block *sb = inode->i_sb; | |
6a9a06d9 | 607 | umode_t mode; |
1da177e4 | 608 | |
abf5d15f | 609 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
610 | /* |
611 | * Copy data to the in-core inode. | |
612 | */ | |
613 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
bfe86848 | 614 | set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); |
c0ef65d2 AV |
615 | if (inode->i_nlink == 0) |
616 | return -ESTALE; | |
1da177e4 LT |
617 | |
618 | /* | |
619 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
620 | */ | |
72235465 EB |
621 | i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); |
622 | i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); | |
1da177e4 LT |
623 | |
624 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
2189850f ED |
625 | inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); |
626 | inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); | |
627 | inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); | |
628 | inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); | |
629 | inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); | |
630 | inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); | |
1da177e4 | 631 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); |
3313e292 | 632 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 633 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
634 | /* |
635 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
636 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
637 | */ | |
1da177e4 LT |
638 | |
639 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
f33219b7 DG |
640 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
641 | sizeof(ufs2_inode->ui_u2.ui_addr)); | |
05f225dc | 642 | } else { |
f33219b7 | 643 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
b12903f1 DG |
644 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
645 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; | |
1da177e4 | 646 | } |
07a0cfec | 647 | return 0; |
05f225dc ED |
648 | } |
649 | ||
b55c460d | 650 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
05f225dc | 651 | { |
b55c460d DH |
652 | struct ufs_inode_info *ufsi; |
653 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
05f225dc | 654 | struct buffer_head * bh; |
b55c460d | 655 | struct inode *inode; |
c0ef65d2 | 656 | int err = -EIO; |
05f225dc | 657 | |
b55c460d | 658 | UFSD("ENTER, ino %lu\n", ino); |
05f225dc | 659 | |
b55c460d | 660 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
05f225dc | 661 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", |
b55c460d DH |
662 | ino); |
663 | return ERR_PTR(-EIO); | |
05f225dc ED |
664 | } |
665 | ||
b55c460d DH |
666 | inode = iget_locked(sb, ino); |
667 | if (!inode) | |
668 | return ERR_PTR(-ENOMEM); | |
669 | if (!(inode->i_state & I_NEW)) | |
670 | return inode; | |
671 | ||
672 | ufsi = UFS_I(inode); | |
673 | ||
05f225dc ED |
674 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
675 | if (!bh) { | |
676 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
677 | inode->i_ino); | |
678 | goto bad_inode; | |
679 | } | |
680 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
681 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
682 | ||
07a0cfec ED |
683 | err = ufs2_read_inode(inode, |
684 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc ED |
685 | } else { |
686 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
687 | ||
07a0cfec ED |
688 | err = ufs1_read_inode(inode, |
689 | ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
05f225dc | 690 | } |
c0ef65d2 | 691 | brelse(bh); |
07a0cfec ED |
692 | if (err) |
693 | goto bad_inode; | |
c0ef65d2 | 694 | |
05f225dc ED |
695 | inode->i_version++; |
696 | ufsi->i_lastfrag = | |
697 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
698 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
699 | ufsi->i_osync = 0; |
700 | ||
826843a3 | 701 | ufs_set_inode_ops(inode); |
1da177e4 | 702 | |
abf5d15f | 703 | UFSD("EXIT\n"); |
b55c460d DH |
704 | unlock_new_inode(inode); |
705 | return inode; | |
05f225dc ED |
706 | |
707 | bad_inode: | |
b55c460d | 708 | iget_failed(inode); |
c0ef65d2 | 709 | return ERR_PTR(err); |
1da177e4 LT |
710 | } |
711 | ||
3313e292 | 712 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 713 | { |
3313e292 ED |
714 | struct super_block *sb = inode->i_sb; |
715 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1da177e4 LT |
716 | |
717 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
718 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
719 | ||
72235465 EB |
720 | ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); |
721 | ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); | |
010d331f | 722 | |
1da177e4 LT |
723 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); |
724 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
725 | ufs_inode->ui_atime.tv_usec = 0; | |
726 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
727 | ufs_inode->ui_ctime.tv_usec = 0; | |
728 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
729 | ufs_inode->ui_mtime.tv_usec = 0; | |
730 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
731 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 732 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 733 | |
3313e292 | 734 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
735 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
736 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
737 | } | |
738 | ||
739 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
740 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
741 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
742 | } else if (inode->i_blocks) { | |
f33219b7 DG |
743 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
744 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
1da177e4 LT |
745 | } |
746 | else { | |
f33219b7 DG |
747 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
748 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
1da177e4 LT |
749 | } |
750 | ||
751 | if (!inode->i_nlink) | |
752 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
753 | } |
754 | ||
755 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
756 | { | |
757 | struct super_block *sb = inode->i_sb; | |
758 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
3313e292 ED |
759 | |
760 | UFSD("ENTER\n"); | |
761 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
762 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
763 | ||
72235465 EB |
764 | ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); |
765 | ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); | |
3313e292 ED |
766 | |
767 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
2189850f ED |
768 | ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); |
769 | ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); | |
770 | ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); | |
771 | ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); | |
772 | ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); | |
773 | ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); | |
3313e292 ED |
774 | |
775 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
776 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
777 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
778 | ||
779 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
780 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
781 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
782 | } else if (inode->i_blocks) { | |
f33219b7 DG |
783 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
784 | sizeof(ufs_inode->ui_u2.ui_addr)); | |
3313e292 | 785 | } else { |
f33219b7 DG |
786 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
787 | sizeof(ufs_inode->ui_u2.ui_symlink)); | |
3313e292 ED |
788 | } |
789 | ||
790 | if (!inode->i_nlink) | |
791 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
792 | UFSD("EXIT\n"); | |
793 | } | |
794 | ||
795 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
796 | { | |
797 | struct super_block *sb = inode->i_sb; | |
798 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
799 | struct buffer_head * bh; | |
800 | ||
801 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
802 | ||
803 | if (inode->i_ino < UFS_ROOTINO || | |
804 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
805 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
806 | return -1; | |
807 | } | |
808 | ||
809 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
810 | if (!bh) { | |
811 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
812 | return -1; | |
813 | } | |
814 | if (uspi->fs_magic == UFS2_MAGIC) { | |
815 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
816 | ||
817 | ufs2_update_inode(inode, | |
818 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
819 | } else { | |
820 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
821 | ||
822 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
823 | } | |
010d331f | 824 | |
1da177e4 LT |
825 | mark_buffer_dirty(bh); |
826 | if (do_sync) | |
827 | sync_dirty_buffer(bh); | |
828 | brelse (bh); | |
010d331f | 829 | |
abf5d15f | 830 | UFSD("EXIT\n"); |
1da177e4 LT |
831 | return 0; |
832 | } | |
833 | ||
a9185b41 | 834 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 835 | { |
f3e0f3da | 836 | return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
837 | } |
838 | ||
839 | int ufs_sync_inode (struct inode *inode) | |
840 | { | |
841 | return ufs_update_inode (inode, 1); | |
842 | } | |
843 | ||
58e8268c | 844 | void ufs_evict_inode(struct inode * inode) |
1da177e4 | 845 | { |
58e8268c AV |
846 | int want_delete = 0; |
847 | ||
848 | if (!inode->i_nlink && !is_bad_inode(inode)) | |
849 | want_delete = 1; | |
10e5dce0 | 850 | |
91b0abe3 | 851 | truncate_inode_pages_final(&inode->i_data); |
58e8268c | 852 | if (want_delete) { |
58e8268c | 853 | inode->i_size = 0; |
babef37d AV |
854 | if (inode->i_blocks && |
855 | (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
856 | S_ISLNK(inode->i_mode))) | |
d622f167 | 857 | ufs_truncate_blocks(inode); |
67a70017 | 858 | ufs_update_inode(inode, inode_needs_sync(inode)); |
58e8268c AV |
859 | } |
860 | ||
861 | invalidate_inode_buffers(inode); | |
dbd5768f | 862 | clear_inode(inode); |
58e8268c | 863 | |
f3e0f3da | 864 | if (want_delete) |
9ef7db7f | 865 | ufs_free_inode(inode); |
1da177e4 | 866 | } |
010d331f | 867 | |
a138b4b6 AV |
868 | struct to_free { |
869 | struct inode *inode; | |
870 | u64 to; | |
871 | unsigned count; | |
872 | }; | |
873 | ||
874 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) | |
875 | { | |
876 | if (ctx->count && ctx->to != from) { | |
877 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); | |
878 | ctx->count = 0; | |
879 | } | |
880 | ctx->count += count; | |
881 | ctx->to = from + count; | |
882 | } | |
883 | ||
010d331f AV |
884 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) |
885 | ||
886 | static void ufs_trunc_direct(struct inode *inode) | |
887 | { | |
888 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
889 | struct super_block * sb; | |
890 | struct ufs_sb_private_info * uspi; | |
891 | void *p; | |
892 | u64 frag1, frag2, frag3, frag4, block1, block2; | |
a138b4b6 | 893 | struct to_free ctx = {.inode = inode}; |
010d331f AV |
894 | unsigned i, tmp; |
895 | ||
896 | UFSD("ENTER: ino %lu\n", inode->i_ino); | |
897 | ||
898 | sb = inode->i_sb; | |
899 | uspi = UFS_SB(sb)->s_uspi; | |
900 | ||
010d331f AV |
901 | frag1 = DIRECT_FRAGMENT; |
902 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); | |
903 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); | |
904 | frag3 = frag4 & ~uspi->s_fpbmask; | |
905 | block1 = block2 = 0; | |
906 | if (frag2 > frag3) { | |
907 | frag2 = frag4; | |
908 | frag3 = frag4 = 0; | |
909 | } else if (frag2 < frag3) { | |
910 | block1 = ufs_fragstoblks (frag2); | |
911 | block2 = ufs_fragstoblks (frag3); | |
912 | } | |
913 | ||
914 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," | |
915 | " frag3 %llu, frag4 %llu\n", inode->i_ino, | |
916 | (unsigned long long)frag1, (unsigned long long)frag2, | |
917 | (unsigned long long)block1, (unsigned long long)block2, | |
918 | (unsigned long long)frag3, (unsigned long long)frag4); | |
919 | ||
920 | if (frag1 >= frag2) | |
921 | goto next1; | |
922 | ||
923 | /* | |
924 | * Free first free fragments | |
925 | */ | |
926 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); | |
927 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
928 | if (!tmp ) | |
929 | ufs_panic (sb, "ufs_trunc_direct", "internal error"); | |
930 | frag2 -= frag1; | |
931 | frag1 = ufs_fragnum (frag1); | |
932 | ||
933 | ufs_free_fragments(inode, tmp + frag1, frag2); | |
010d331f AV |
934 | |
935 | next1: | |
936 | /* | |
937 | * Free whole blocks | |
938 | */ | |
939 | for (i = block1 ; i < block2; i++) { | |
940 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); | |
941 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
942 | if (!tmp) | |
943 | continue; | |
944 | write_seqlock(&ufsi->meta_lock); | |
945 | ufs_data_ptr_clear(uspi, p); | |
946 | write_sequnlock(&ufsi->meta_lock); | |
947 | ||
a138b4b6 | 948 | free_data(&ctx, tmp, uspi->s_fpb); |
010d331f AV |
949 | } |
950 | ||
a138b4b6 | 951 | free_data(&ctx, 0, 0); |
010d331f AV |
952 | |
953 | if (frag3 >= frag4) | |
954 | goto next3; | |
955 | ||
956 | /* | |
957 | * Free last free fragments | |
958 | */ | |
959 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); | |
960 | tmp = ufs_data_ptr_to_cpu(sb, p); | |
961 | if (!tmp ) | |
962 | ufs_panic(sb, "ufs_truncate_direct", "internal error"); | |
963 | frag4 = ufs_fragnum (frag4); | |
964 | write_seqlock(&ufsi->meta_lock); | |
965 | ufs_data_ptr_clear(uspi, p); | |
966 | write_sequnlock(&ufsi->meta_lock); | |
967 | ||
968 | ufs_free_fragments (inode, tmp, frag4); | |
010d331f AV |
969 | next3: |
970 | ||
971 | UFSD("EXIT: ino %lu\n", inode->i_ino); | |
972 | } | |
973 | ||
163073db | 974 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
6d1ebbca AV |
975 | { |
976 | struct super_block *sb = inode->i_sb; | |
977 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
163073db | 978 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
6d1ebbca AV |
979 | unsigned i; |
980 | ||
163073db | 981 | if (!ubh) |
6d1ebbca | 982 | return; |
6d1ebbca AV |
983 | |
984 | if (--depth) { | |
163073db AV |
985 | for (i = 0; i < uspi->s_apb; i++) { |
986 | void *p = ubh_get_data_ptr(uspi, ubh, i); | |
987 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 988 | if (block) |
163073db | 989 | free_full_branch(inode, block, depth); |
6d1ebbca AV |
990 | } |
991 | } else { | |
992 | struct to_free ctx = {.inode = inode}; | |
993 | ||
994 | for (i = 0; i < uspi->s_apb; i++) { | |
163073db AV |
995 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
996 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
cc7231e3 | 997 | if (block) |
163073db | 998 | free_data(&ctx, block, uspi->s_fpb); |
6d1ebbca AV |
999 | } |
1000 | free_data(&ctx, 0, 0); | |
1001 | } | |
6d1ebbca AV |
1002 | |
1003 | ubh_bforget(ubh); | |
163073db | 1004 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
6d1ebbca AV |
1005 | } |
1006 | ||
7b4e4f7f | 1007 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
010d331f | 1008 | { |
7bad5939 AV |
1009 | struct super_block *sb = inode->i_sb; |
1010 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1011 | unsigned i; |
010d331f | 1012 | |
9e0fbbde | 1013 | if (--depth) { |
7b4e4f7f | 1014 | for (i = from; i < uspi->s_apb ; i++) { |
163073db AV |
1015 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1016 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1017 | if (block) { | |
1018 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1019 | ufs_data_ptr_clear(uspi, p); | |
1020 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1021 | ubh_mark_buffer_dirty(ubh); | |
1022 | free_full_branch(inode, block, depth); | |
1023 | } | |
a9657423 | 1024 | } |
9e0fbbde | 1025 | } else { |
a138b4b6 | 1026 | struct to_free ctx = {.inode = inode}; |
9e0fbbde AV |
1027 | |
1028 | for (i = from; i < uspi->s_apb; i++) { | |
163073db AV |
1029 | void *p = ubh_get_data_ptr(uspi, ubh, i); |
1030 | u64 block = ufs_data_ptr_to_cpu(sb, p); | |
1031 | if (block) { | |
1032 | write_seqlock(&UFS_I(inode)->meta_lock); | |
1033 | ufs_data_ptr_clear(uspi, p); | |
1034 | write_sequnlock(&UFS_I(inode)->meta_lock); | |
1035 | ubh_mark_buffer_dirty(ubh); | |
1036 | free_data(&ctx, block, uspi->s_fpb); | |
163073db | 1037 | } |
9e0fbbde | 1038 | } |
a138b4b6 | 1039 | free_data(&ctx, 0, 0); |
010d331f | 1040 | } |
9e0fbbde AV |
1041 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1042 | ubh_sync_block(ubh); | |
1043 | ubh_brelse(ubh); | |
010d331f AV |
1044 | } |
1045 | ||
1046 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) | |
1047 | { | |
1048 | int err = 0; | |
1049 | struct super_block *sb = inode->i_sb; | |
1050 | struct address_space *mapping = inode->i_mapping; | |
1051 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1052 | unsigned i, end; | |
1053 | sector_t lastfrag; | |
1054 | struct page *lastpage; | |
1055 | struct buffer_head *bh; | |
1056 | u64 phys64; | |
1057 | ||
1058 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
1059 | ||
1060 | if (!lastfrag) | |
1061 | goto out; | |
1062 | ||
1063 | lastfrag--; | |
1064 | ||
1065 | lastpage = ufs_get_locked_page(mapping, lastfrag >> | |
09cbfeaf | 1066 | (PAGE_SHIFT - inode->i_blkbits)); |
010d331f AV |
1067 | if (IS_ERR(lastpage)) { |
1068 | err = -EIO; | |
1069 | goto out; | |
1070 | } | |
1071 | ||
09cbfeaf | 1072 | end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); |
010d331f AV |
1073 | bh = page_buffers(lastpage); |
1074 | for (i = 0; i < end; ++i) | |
1075 | bh = bh->b_this_page; | |
1076 | ||
1077 | ||
1078 | err = ufs_getfrag_block(inode, lastfrag, bh, 1); | |
1079 | ||
1080 | if (unlikely(err)) | |
1081 | goto out_unlock; | |
1082 | ||
1083 | if (buffer_new(bh)) { | |
1084 | clear_buffer_new(bh); | |
e64855c6 | 1085 | clean_bdev_bh_alias(bh); |
010d331f AV |
1086 | /* |
1087 | * we do not zeroize fragment, because of | |
1088 | * if it maped to hole, it already contains zeroes | |
1089 | */ | |
1090 | set_buffer_uptodate(bh); | |
1091 | mark_buffer_dirty(bh); | |
1092 | set_page_dirty(lastpage); | |
1093 | } | |
1094 | ||
1095 | if (lastfrag >= UFS_IND_FRAGMENT) { | |
1096 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; | |
1097 | phys64 = bh->b_blocknr + 1; | |
1098 | for (i = 0; i < end; ++i) { | |
1099 | bh = sb_getblk(sb, i + phys64); | |
1100 | lock_buffer(bh); | |
1101 | memset(bh->b_data, 0, sb->s_blocksize); | |
1102 | set_buffer_uptodate(bh); | |
1103 | mark_buffer_dirty(bh); | |
1104 | unlock_buffer(bh); | |
1105 | sync_dirty_buffer(bh); | |
1106 | brelse(bh); | |
1107 | } | |
1108 | } | |
1109 | out_unlock: | |
1110 | ufs_put_locked_page(lastpage); | |
1111 | out: | |
1112 | return err; | |
1113 | } | |
1114 | ||
babef37d | 1115 | static void ufs_truncate_blocks(struct inode *inode) |
010d331f AV |
1116 | { |
1117 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
1118 | struct super_block *sb = inode->i_sb; | |
1119 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
7bad5939 | 1120 | unsigned offsets[4]; |
a8fad984 | 1121 | int depth; |
6775e24d | 1122 | int depth2; |
42432739 | 1123 | unsigned i; |
7b4e4f7f AV |
1124 | struct ufs_buffer_head *ubh[3]; |
1125 | void *p; | |
1126 | u64 block; | |
6775e24d | 1127 | |
a8fad984 AV |
1128 | if (inode->i_size) { |
1129 | sector_t last = (inode->i_size - 1) >> uspi->s_bshift; | |
1130 | depth = ufs_block_to_path(inode, last, offsets); | |
1131 | if (!depth) | |
1132 | return; | |
1133 | } else { | |
1134 | depth = 1; | |
1135 | } | |
6775e24d | 1136 | |
6775e24d | 1137 | for (depth2 = depth - 1; depth2; depth2--) |
a8fad984 | 1138 | if (offsets[depth2] != uspi->s_apb - 1) |
6775e24d | 1139 | break; |
010d331f AV |
1140 | |
1141 | mutex_lock(&ufsi->truncate_mutex); | |
42432739 | 1142 | if (depth == 1) { |
31cd043e | 1143 | ufs_trunc_direct(inode); |
42432739 AV |
1144 | offsets[0] = UFS_IND_BLOCK; |
1145 | } else { | |
7b4e4f7f | 1146 | /* get the blocks that should be partially emptied */ |
a8fad984 | 1147 | p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); |
7b4e4f7f | 1148 | for (i = 0; i < depth2; i++) { |
7b4e4f7f AV |
1149 | block = ufs_data_ptr_to_cpu(sb, p); |
1150 | if (!block) | |
1151 | break; | |
1152 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); | |
1153 | if (!ubh[i]) { | |
1154 | write_seqlock(&ufsi->meta_lock); | |
1155 | ufs_data_ptr_clear(uspi, p); | |
1156 | write_sequnlock(&ufsi->meta_lock); | |
1157 | break; | |
1158 | } | |
a8fad984 | 1159 | p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); |
7b4e4f7f | 1160 | } |
f53bd142 | 1161 | while (i--) |
7b4e4f7f | 1162 | free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); |
42432739 AV |
1163 | } |
1164 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { | |
163073db AV |
1165 | p = ufs_get_direct_data_ptr(uspi, ufsi, i); |
1166 | block = ufs_data_ptr_to_cpu(sb, p); | |
1167 | if (block) { | |
1168 | write_seqlock(&ufsi->meta_lock); | |
1169 | ufs_data_ptr_clear(uspi, p); | |
1170 | write_sequnlock(&ufsi->meta_lock); | |
1171 | free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); | |
1172 | } | |
31cd043e | 1173 | } |
09bf4f5b | 1174 | read_seqlock_excl(&ufsi->meta_lock); |
010d331f | 1175 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
09bf4f5b | 1176 | read_sequnlock_excl(&ufsi->meta_lock); |
b6eede0e | 1177 | mark_inode_dirty(inode); |
010d331f AV |
1178 | mutex_unlock(&ufsi->truncate_mutex); |
1179 | } | |
1180 | ||
1181 | static int ufs_truncate(struct inode *inode, loff_t size) | |
1182 | { | |
1183 | int err = 0; | |
1184 | ||
1185 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", | |
1186 | inode->i_ino, (unsigned long long)size, | |
1187 | (unsigned long long)i_size_read(inode)); | |
1188 | ||
1189 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
1190 | S_ISLNK(inode->i_mode))) | |
1191 | return -EINVAL; | |
1192 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1193 | return -EPERM; | |
1194 | ||
1195 | err = ufs_alloc_lastblock(inode, size); | |
1196 | ||
1197 | if (err) | |
1198 | goto out; | |
1199 | ||
1200 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); | |
1201 | ||
1202 | truncate_setsize(inode, size); | |
1203 | ||
babef37d | 1204 | ufs_truncate_blocks(inode); |
02027d42 | 1205 | inode->i_mtime = inode->i_ctime = current_time(inode); |
010d331f AV |
1206 | mark_inode_dirty(inode); |
1207 | out: | |
1208 | UFSD("EXIT: err %d\n", err); | |
1209 | return err; | |
1210 | } | |
1211 | ||
010d331f AV |
1212 | int ufs_setattr(struct dentry *dentry, struct iattr *attr) |
1213 | { | |
1214 | struct inode *inode = d_inode(dentry); | |
1215 | unsigned int ia_valid = attr->ia_valid; | |
1216 | int error; | |
1217 | ||
31051c85 | 1218 | error = setattr_prepare(dentry, attr); |
010d331f AV |
1219 | if (error) |
1220 | return error; | |
1221 | ||
1222 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { | |
1223 | error = ufs_truncate(inode, attr->ia_size); | |
1224 | if (error) | |
1225 | return error; | |
1226 | } | |
1227 | ||
1228 | setattr_copy(inode, attr); | |
1229 | mark_inode_dirty(inode); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | const struct inode_operations ufs_file_inode_operations = { | |
1234 | .setattr = ufs_setattr, | |
1235 | }; |