1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * linux/fs/ufs/inode.c |
4 | * |
5 | * Copyright (C) 1998 |
6 | * Daniel Pirkl <daniel.pirkl@email.cz> |
7 | * Charles University, Faculty of Mathematics and Physics |
8 | * |
9 | * from |
10 | * |
11 | * linux/fs/ext2/inode.c |
12 | * |
13 | * Copyright (C) 1992, 1993, 1994, 1995 |
14 | * Remy Card (card@masi.ibp.fr) |
15 | * Laboratoire MASI - Institut Blaise Pascal |
16 | * Universite Pierre et Marie Curie (Paris VI) |
17 | * |
18 | * from |
19 | * |
20 | * linux/fs/minix/inode.c |
21 | * |
22 | * Copyright (C) 1991, 1992 Linus Torvalds |
23 | * |
24 | * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 |
25 | * Big-endian to little-endian byte-swapping/bitmaps by |
26 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
27 | */ |
28 | |
29 | #include <linux/uaccess.h> |
30 | |
31 | #include <linux/errno.h> |
32 | #include <linux/fs.h> |
33 | #include <linux/time.h> |
34 | #include <linux/stat.h> |
35 | #include <linux/string.h> |
36 | #include <linux/mm.h> |
37 | #include <linux/buffer_head.h> |
38 | #include <linux/writeback.h> |
39 | #include <linux/iversion.h> |
40 | |
41 | #include "ufs_fs.h" |
42 | #include "ufs.h" |
43 | #include "swab.h" |
44 | #include "util.h" |
45 | |
46 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) |
47 | { |
48 | struct ufs_sb_private_info *uspi = UFS_SB(sb: inode->i_sb)->s_uspi; |
49 | int ptrs = uspi->s_apb; |
50 | int ptrs_bits = uspi->s_apbshift; |
51 | const long direct_blocks = UFS_NDADDR, |
52 | indirect_blocks = ptrs, |
53 | double_blocks = (1 << (ptrs_bits * 2)); |
54 | int n = 0; |
55 | |
56 | |
57 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n" ,ptrs,double_blocks); |
58 | if (i_block < direct_blocks) { |
59 | offsets[n++] = i_block; |
60 | } else if ((i_block -= direct_blocks) < indirect_blocks) { |
61 | offsets[n++] = UFS_IND_BLOCK; |
62 | offsets[n++] = i_block; |
63 | } else if ((i_block -= indirect_blocks) < double_blocks) { |
64 | offsets[n++] = UFS_DIND_BLOCK; |
65 | offsets[n++] = i_block >> ptrs_bits; |
66 | offsets[n++] = i_block & (ptrs - 1); |
67 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { |
68 | offsets[n++] = UFS_TIND_BLOCK; |
69 | offsets[n++] = i_block >> (ptrs_bits * 2); |
70 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); |
71 | offsets[n++] = i_block & (ptrs - 1); |
72 | } else { |
73 | ufs_warning(inode->i_sb, "ufs_block_to_path" , "block > big" ); |
74 | } |
75 | return n; |
76 | } |
77 | |
78 | typedef struct { |
79 | void *p; |
80 | union { |
81 | __fs32 key32; |
82 | __fs64 key64; |
83 | }; |
84 | struct buffer_head *bh; |
85 | } Indirect; |
86 | |
87 | static inline int grow_chain32(struct ufs_inode_info *ufsi, |
88 | struct buffer_head *bh, __fs32 *v, |
89 | Indirect *from, Indirect *to) |
90 | { |
91 | Indirect *p; |
92 | unsigned seq; |
93 | to->bh = bh; |
94 | do { |
95 | seq = read_seqbegin(sl: &ufsi->meta_lock); |
96 | to->key32 = *(__fs32 *)(to->p = v); |
97 | for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) |
98 | ; |
99 | } while (read_seqretry(sl: &ufsi->meta_lock, start: seq)); |
100 | return (p > to); |
101 | } |
102 | |
103 | static inline int grow_chain64(struct ufs_inode_info *ufsi, |
104 | struct buffer_head *bh, __fs64 *v, |
105 | Indirect *from, Indirect *to) |
106 | { |
107 | Indirect *p; |
108 | unsigned seq; |
109 | to->bh = bh; |
110 | do { |
111 | seq = read_seqbegin(sl: &ufsi->meta_lock); |
112 | to->key64 = *(__fs64 *)(to->p = v); |
113 | for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) |
114 | ; |
115 | } while (read_seqretry(sl: &ufsi->meta_lock, start: seq)); |
116 | return (p > to); |
117 | } |
118 | |
119 | /* |
120 | * Returns the location of the fragment from |
121 | * the beginning of the filesystem. |
122 | */ |
123 | |
124 | static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) |
125 | { |
126 | struct ufs_inode_info *ufsi = UFS_I(inode); |
127 | struct super_block *sb = inode->i_sb; |
128 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
129 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; |
130 | int shift = uspi->s_apbshift-uspi->s_fpbshift; |
131 | Indirect chain[4], *q = chain; |
132 | unsigned *p; |
133 | unsigned flags = UFS_SB(sb)->s_flags; |
134 | u64 res = 0; |
135 | |
136 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n" , |
137 | uspi->s_fpbshift, uspi->s_apbmask, |
138 | (unsigned long long)mask); |
139 | |
140 | if (depth == 0) |
141 | goto no_block; |
142 | |
143 | again: |
144 | p = offsets; |
145 | |
146 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
147 | goto ufs2; |
148 | |
149 | if (!grow_chain32(ufsi, NULL, v: &ufsi->i_u1.i_data[*p++], from: chain, to: q)) |
150 | goto changed; |
151 | if (!q->key32) |
152 | goto no_block; |
153 | while (--depth) { |
154 | __fs32 *ptr; |
155 | struct buffer_head *bh; |
156 | unsigned n = *p++; |
157 | |
158 | bh = sb_bread(sb, block: uspi->s_sbbase + |
159 | fs32_to_cpu(sbp: sb, n: q->key32) + (n>>shift)); |
160 | if (!bh) |
161 | goto no_block; |
162 | ptr = (__fs32 *)bh->b_data + (n & mask); |
163 | if (!grow_chain32(ufsi, bh, v: ptr, from: chain, to: ++q)) |
164 | goto changed; |
165 | if (!q->key32) |
166 | goto no_block; |
167 | } |
168 | res = fs32_to_cpu(sbp: sb, n: q->key32); |
169 | goto found; |
170 | |
171 | ufs2: |
172 | if (!grow_chain64(ufsi, NULL, v: &ufsi->i_u1.u2_i_data[*p++], from: chain, to: q)) |
173 | goto changed; |
174 | if (!q->key64) |
175 | goto no_block; |
176 | |
177 | while (--depth) { |
178 | __fs64 *ptr; |
179 | struct buffer_head *bh; |
180 | unsigned n = *p++; |
181 | |
182 | bh = sb_bread(sb, block: uspi->s_sbbase + |
183 | fs64_to_cpu(sbp: sb, n: q->key64) + (n>>shift)); |
184 | if (!bh) |
185 | goto no_block; |
186 | ptr = (__fs64 *)bh->b_data + (n & mask); |
187 | if (!grow_chain64(ufsi, bh, v: ptr, from: chain, to: ++q)) |
188 | goto changed; |
189 | if (!q->key64) |
190 | goto no_block; |
191 | } |
192 | res = fs64_to_cpu(sbp: sb, n: q->key64); |
193 | found: |
194 | res += uspi->s_sbbase; |
195 | no_block: |
196 | while (q > chain) { |
197 | brelse(bh: q->bh); |
198 | q--; |
199 | } |
200 | return res; |
201 | |
202 | changed: |
203 | while (q > chain) { |
204 | brelse(bh: q->bh); |
205 | q--; |
206 | } |
207 | goto again; |
208 | } |
209 | |
210 | /* |
211 | * Unpacking tails: we have a file with partial final block and |
212 | * we had been asked to extend it. If the fragment being written |
213 | * is within the same block, we need to extend the tail just to cover |
214 | * that fragment. Otherwise the tail is extended to full block. |
215 | * |
216 | * Note that we might need to create a _new_ tail, but that will |
217 | * be handled elsewhere; this is strictly for resizing old |
218 | * ones. |
219 | */ |
220 | static bool |
221 | ufs_extend_tail(struct inode *inode, u64 writes_to, |
222 | int *err, struct page *locked_page) |
223 | { |
224 | struct ufs_inode_info *ufsi = UFS_I(inode); |
225 | struct super_block *sb = inode->i_sb; |
226 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
227 | unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ |
228 | unsigned block = ufs_fragstoblks(lastfrag); |
229 | unsigned new_size; |
230 | void *p; |
231 | u64 tmp; |
232 | |
233 | if (writes_to < (lastfrag | uspi->s_fpbmask)) |
234 | new_size = (writes_to & uspi->s_fpbmask) + 1; |
235 | else |
236 | new_size = uspi->s_fpb; |
237 | |
238 | p = ufs_get_direct_data_ptr(uspi, ufsi, blk: block); |
239 | tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), |
240 | new_size - (lastfrag & uspi->s_fpbmask), err, |
241 | locked_page); |
242 | return tmp != 0; |
243 | } |
244 | |
245 | /** |
246 | * ufs_inode_getfrag() - allocate new fragment(s) |
247 | * @inode: pointer to inode |
248 | * @index: number of block pointer within the inode's array. |
249 | * @new_fragment: number of new allocated fragment(s) |
250 | * @err: we set it if something wrong |
251 | * @new: we set it if we allocate new block |
252 | * @locked_page: for ufs_new_fragments() |
253 | */ |
254 | static u64 |
255 | ufs_inode_getfrag(struct inode *inode, unsigned index, |
256 | sector_t new_fragment, int *err, |
257 | int *new, struct page *locked_page) |
258 | { |
259 | struct ufs_inode_info *ufsi = UFS_I(inode); |
260 | struct super_block *sb = inode->i_sb; |
261 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
262 | u64 tmp, goal, lastfrag; |
263 | unsigned nfrags = uspi->s_fpb; |
264 | void *p; |
265 | |
266 | /* TODO : to be done for write support |
267 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
268 | goto ufs2; |
269 | */ |
270 | |
271 | p = ufs_get_direct_data_ptr(uspi, ufsi, blk: index); |
272 | tmp = ufs_data_ptr_to_cpu(sb, p); |
273 | if (tmp) |
274 | goto out; |
275 | |
276 | lastfrag = ufsi->i_lastfrag; |
277 | |
278 | /* will that be a new tail? */ |
279 | if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) |
280 | nfrags = (new_fragment & uspi->s_fpbmask) + 1; |
281 | |
282 | goal = 0; |
283 | if (index) { |
284 | goal = ufs_data_ptr_to_cpu(sb, |
285 | p: ufs_get_direct_data_ptr(uspi, ufsi, blk: index - 1)); |
286 | if (goal) |
287 | goal += uspi->s_fpb; |
288 | } |
289 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), |
290 | goal, nfrags, err, locked_page); |
291 | |
292 | if (!tmp) { |
293 | *err = -ENOSPC; |
294 | return 0; |
295 | } |
296 | |
297 | if (new) |
298 | *new = 1; |
299 | inode_set_ctime_current(inode); |
300 | if (IS_SYNC(inode)) |
301 | ufs_sync_inode (inode); |
302 | mark_inode_dirty(inode); |
303 | out: |
304 | return tmp + uspi->s_sbbase; |
305 | |
306 | /* This part : To be implemented .... |
307 | Required only for writing, not required for READ-ONLY. |
308 | ufs2: |
309 | |
310 | u2_block = ufs_fragstoblks(fragment); |
311 | u2_blockoff = ufs_fragnum(fragment); |
312 | p = ufsi->i_u1.u2_i_data + block; |
313 | goal = 0; |
314 | |
315 | repeat2: |
316 | tmp = fs32_to_cpu(sb, *p); |
317 | lastfrag = ufsi->i_lastfrag; |
318 | |
319 | */ |
320 | } |
321 | |
322 | /** |
323 | * ufs_inode_getblock() - allocate new block |
324 | * @inode: pointer to inode |
325 | * @ind_block: block number of the indirect block |
326 | * @index: number of pointer within the indirect block |
327 | * @new_fragment: number of new allocated fragment |
328 | * (block will hold this fragment and also uspi->s_fpb-1) |
329 | * @err: see ufs_inode_getfrag() |
330 | * @new: see ufs_inode_getfrag() |
331 | * @locked_page: see ufs_inode_getfrag() |
332 | */ |
333 | static u64 |
334 | ufs_inode_getblock(struct inode *inode, u64 ind_block, |
335 | unsigned index, sector_t new_fragment, int *err, |
336 | int *new, struct page *locked_page) |
337 | { |
338 | struct super_block *sb = inode->i_sb; |
339 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
340 | int shift = uspi->s_apbshift - uspi->s_fpbshift; |
341 | u64 tmp = 0, goal; |
342 | struct buffer_head *bh; |
343 | void *p; |
344 | |
345 | if (!ind_block) |
346 | return 0; |
347 | |
348 | bh = sb_bread(sb, block: ind_block + (index >> shift)); |
349 | if (unlikely(!bh)) { |
350 | *err = -EIO; |
351 | return 0; |
352 | } |
353 | |
354 | index &= uspi->s_apbmask >> uspi->s_fpbshift; |
355 | if (uspi->fs_magic == UFS2_MAGIC) |
356 | p = (__fs64 *)bh->b_data + index; |
357 | else |
358 | p = (__fs32 *)bh->b_data + index; |
359 | |
360 | tmp = ufs_data_ptr_to_cpu(sb, p); |
361 | if (tmp) |
362 | goto out; |
363 | |
364 | if (index && (uspi->fs_magic == UFS2_MAGIC ? |
365 | (tmp = fs64_to_cpu(sbp: sb, n: ((__fs64 *)bh->b_data)[index-1])) : |
366 | (tmp = fs32_to_cpu(sbp: sb, n: ((__fs32 *)bh->b_data)[index-1])))) |
367 | goal = tmp + uspi->s_fpb; |
368 | else |
369 | goal = bh->b_blocknr + uspi->s_fpb; |
370 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
371 | uspi->s_fpb, err, locked_page); |
372 | if (!tmp) |
373 | goto out; |
374 | |
375 | if (new) |
376 | *new = 1; |
377 | |
378 | mark_buffer_dirty(bh); |
379 | if (IS_SYNC(inode)) |
380 | sync_dirty_buffer(bh); |
381 | inode_set_ctime_current(inode); |
382 | mark_inode_dirty(inode); |
383 | out: |
384 | brelse (bh); |
385 | UFSD("EXIT\n" ); |
386 | if (tmp) |
387 | tmp += uspi->s_sbbase; |
388 | return tmp; |
389 | } |
390 | |
391 | /** |
392 | * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
393 | * read_folio, writepage and so on |
394 | */ |
395 | |
396 | static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
397 | { |
398 | struct super_block *sb = inode->i_sb; |
399 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
400 | int err = 0, new = 0; |
401 | unsigned offsets[4]; |
402 | int depth = ufs_block_to_path(inode, i_block: fragment >> uspi->s_fpbshift, offsets); |
403 | u64 phys64 = 0; |
404 | unsigned frag = fragment & uspi->s_fpbmask; |
405 | |
406 | phys64 = ufs_frag_map(inode, offsets, depth); |
407 | if (!create) |
408 | goto done; |
409 | |
410 | if (phys64) { |
411 | if (fragment >= UFS_NDIR_FRAGMENT) |
412 | goto done; |
413 | read_seqlock_excl(sl: &UFS_I(inode)->meta_lock); |
414 | if (fragment < UFS_I(inode)->i_lastfrag) { |
415 | read_sequnlock_excl(sl: &UFS_I(inode)->meta_lock); |
416 | goto done; |
417 | } |
418 | read_sequnlock_excl(sl: &UFS_I(inode)->meta_lock); |
419 | } |
420 | /* This code entered only while writing ....? */ |
421 | |
422 | mutex_lock(&UFS_I(inode)->truncate_mutex); |
423 | |
424 | UFSD("ENTER, ino %lu, fragment %llu\n" , inode->i_ino, (unsigned long long)fragment); |
425 | if (unlikely(!depth)) { |
426 | ufs_warning(sb, "ufs_get_block" , "block > big" ); |
427 | err = -EIO; |
428 | goto out; |
429 | } |
430 | |
431 | if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { |
432 | unsigned lastfrag = UFS_I(inode)->i_lastfrag; |
433 | unsigned tailfrags = lastfrag & uspi->s_fpbmask; |
434 | if (tailfrags && fragment >= lastfrag) { |
435 | if (!ufs_extend_tail(inode, writes_to: fragment, |
436 | err: &err, locked_page: bh_result->b_page)) |
437 | goto out; |
438 | } |
439 | } |
440 | |
441 | if (depth == 1) { |
442 | phys64 = ufs_inode_getfrag(inode, index: offsets[0], new_fragment: fragment, |
443 | err: &err, new: &new, locked_page: bh_result->b_page); |
444 | } else { |
445 | int i; |
446 | phys64 = ufs_inode_getfrag(inode, index: offsets[0], new_fragment: fragment, |
447 | err: &err, NULL, NULL); |
448 | for (i = 1; i < depth - 1; i++) |
449 | phys64 = ufs_inode_getblock(inode, ind_block: phys64, index: offsets[i], |
450 | new_fragment: fragment, err: &err, NULL, NULL); |
451 | phys64 = ufs_inode_getblock(inode, ind_block: phys64, index: offsets[depth - 1], |
452 | new_fragment: fragment, err: &err, new: &new, locked_page: bh_result->b_page); |
453 | } |
454 | out: |
455 | if (phys64) { |
456 | phys64 += frag; |
457 | map_bh(bh: bh_result, sb, block: phys64); |
458 | if (new) |
459 | set_buffer_new(bh_result); |
460 | } |
461 | mutex_unlock(lock: &UFS_I(inode)->truncate_mutex); |
462 | return err; |
463 | |
464 | done: |
465 | if (phys64) |
466 | map_bh(bh: bh_result, sb, block: phys64 + frag); |
467 | return 0; |
468 | } |
469 | |
470 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) |
471 | { |
472 | return block_write_full_page(page,get_block: ufs_getfrag_block,wbc); |
473 | } |
474 | |
475 | static int ufs_read_folio(struct file *file, struct folio *folio) |
476 | { |
477 | return block_read_full_folio(folio, ufs_getfrag_block); |
478 | } |
479 | |
480 | int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
481 | { |
482 | return __block_write_begin(page, pos, len, get_block: ufs_getfrag_block); |
483 | } |
484 | |
485 | static void ufs_truncate_blocks(struct inode *); |
486 | |
487 | static void ufs_write_failed(struct address_space *mapping, loff_t to) |
488 | { |
489 | struct inode *inode = mapping->host; |
490 | |
491 | if (to > inode->i_size) { |
492 | truncate_pagecache(inode, new: inode->i_size); |
493 | ufs_truncate_blocks(inode); |
494 | } |
495 | } |
496 | |
497 | static int ufs_write_begin(struct file *file, struct address_space *mapping, |
498 | loff_t pos, unsigned len, |
499 | struct page **pagep, void **fsdata) |
500 | { |
501 | int ret; |
502 | |
503 | ret = block_write_begin(mapping, pos, len, pagep, get_block: ufs_getfrag_block); |
504 | if (unlikely(ret)) |
505 | ufs_write_failed(mapping, to: pos + len); |
506 | |
507 | return ret; |
508 | } |
509 | |
510 | static int ufs_write_end(struct file *file, struct address_space *mapping, |
511 | loff_t pos, unsigned len, unsigned copied, |
512 | struct page *page, void *fsdata) |
513 | { |
514 | int ret; |
515 | |
516 | ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); |
517 | if (ret < len) |
518 | ufs_write_failed(mapping, to: pos + len); |
519 | return ret; |
520 | } |
521 | |
522 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) |
523 | { |
524 | return generic_block_bmap(mapping,block,ufs_getfrag_block); |
525 | } |
526 | |
527 | const struct address_space_operations ufs_aops = { |
528 | .dirty_folio = block_dirty_folio, |
529 | .invalidate_folio = block_invalidate_folio, |
530 | .read_folio = ufs_read_folio, |
531 | .writepage = ufs_writepage, |
532 | .write_begin = ufs_write_begin, |
533 | .write_end = ufs_write_end, |
534 | .bmap = ufs_bmap |
535 | }; |
536 | |
537 | static void ufs_set_inode_ops(struct inode *inode) |
538 | { |
539 | if (S_ISREG(inode->i_mode)) { |
540 | inode->i_op = &ufs_file_inode_operations; |
541 | inode->i_fop = &ufs_file_operations; |
542 | inode->i_mapping->a_ops = &ufs_aops; |
543 | } else if (S_ISDIR(inode->i_mode)) { |
544 | inode->i_op = &ufs_dir_inode_operations; |
545 | inode->i_fop = &ufs_dir_operations; |
546 | inode->i_mapping->a_ops = &ufs_aops; |
547 | } else if (S_ISLNK(inode->i_mode)) { |
548 | if (!inode->i_blocks) { |
549 | inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; |
550 | inode->i_op = &simple_symlink_inode_operations; |
551 | } else { |
552 | inode->i_mapping->a_ops = &ufs_aops; |
553 | inode->i_op = &page_symlink_inode_operations; |
554 | inode_nohighmem(inode); |
555 | } |
556 | } else |
557 | init_special_inode(inode, inode->i_mode, |
558 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); |
559 | } |
560 | |
561 | static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
562 | { |
563 | struct ufs_inode_info *ufsi = UFS_I(inode); |
564 | struct super_block *sb = inode->i_sb; |
565 | umode_t mode; |
566 | |
567 | /* |
568 | * Copy data to the in-core inode. |
569 | */ |
570 | inode->i_mode = mode = fs16_to_cpu(sbp: sb, n: ufs_inode->ui_mode); |
571 | set_nlink(inode, nlink: fs16_to_cpu(sbp: sb, n: ufs_inode->ui_nlink)); |
572 | if (inode->i_nlink == 0) |
573 | return -ESTALE; |
574 | |
575 | /* |
576 | * Linux now has 32-bit uid and gid, so we can support EFT. |
577 | */ |
578 | i_uid_write(inode, uid: ufs_get_inode_uid(sb, inode: ufs_inode)); |
579 | i_gid_write(inode, gid: ufs_get_inode_gid(sb, inode: ufs_inode)); |
580 | |
581 | inode->i_size = fs64_to_cpu(sbp: sb, n: ufs_inode->ui_size); |
582 | inode_set_atime(inode, |
583 | sec: (signed)fs32_to_cpu(sbp: sb, n: ufs_inode->ui_atime.tv_sec), |
584 | nsec: 0); |
585 | inode_set_ctime(inode, |
586 | sec: (signed)fs32_to_cpu(sbp: sb, n: ufs_inode->ui_ctime.tv_sec), |
587 | nsec: 0); |
588 | inode_set_mtime(inode, |
589 | sec: (signed)fs32_to_cpu(sbp: sb, n: ufs_inode->ui_mtime.tv_sec), |
590 | nsec: 0); |
591 | inode->i_blocks = fs32_to_cpu(sbp: sb, n: ufs_inode->ui_blocks); |
592 | inode->i_generation = fs32_to_cpu(sbp: sb, n: ufs_inode->ui_gen); |
593 | ufsi->i_flags = fs32_to_cpu(sbp: sb, n: ufs_inode->ui_flags); |
594 | ufsi->i_shadow = fs32_to_cpu(sbp: sb, n: ufs_inode->ui_u3.ui_sun.ui_shadow); |
595 | ufsi->i_oeftflag = fs32_to_cpu(sbp: sb, n: ufs_inode->ui_u3.ui_sun.ui_oeftflag); |
596 | |
597 | |
598 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
599 | memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, |
600 | sizeof(ufs_inode->ui_u2.ui_addr)); |
601 | } else { |
602 | memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, |
603 | sizeof(ufs_inode->ui_u2.ui_symlink) - 1); |
604 | ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; |
605 | } |
606 | return 0; |
607 | } |
608 | |
609 | static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
610 | { |
611 | struct ufs_inode_info *ufsi = UFS_I(inode); |
612 | struct super_block *sb = inode->i_sb; |
613 | umode_t mode; |
614 | |
615 | UFSD("Reading ufs2 inode, ino %lu\n" , inode->i_ino); |
616 | /* |
617 | * Copy data to the in-core inode. |
618 | */ |
619 | inode->i_mode = mode = fs16_to_cpu(sbp: sb, n: ufs2_inode->ui_mode); |
620 | set_nlink(inode, nlink: fs16_to_cpu(sbp: sb, n: ufs2_inode->ui_nlink)); |
621 | if (inode->i_nlink == 0) |
622 | return -ESTALE; |
623 | |
624 | /* |
625 | * Linux now has 32-bit uid and gid, so we can support EFT. |
626 | */ |
627 | i_uid_write(inode, uid: fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_uid)); |
628 | i_gid_write(inode, gid: fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_gid)); |
629 | |
630 | inode->i_size = fs64_to_cpu(sbp: sb, n: ufs2_inode->ui_size); |
631 | inode_set_atime(inode, sec: fs64_to_cpu(sbp: sb, n: ufs2_inode->ui_atime), |
632 | nsec: fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_atimensec)); |
633 | inode_set_ctime(inode, sec: fs64_to_cpu(sbp: sb, n: ufs2_inode->ui_ctime), |
634 | nsec: fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_ctimensec)); |
635 | inode_set_mtime(inode, sec: fs64_to_cpu(sbp: sb, n: ufs2_inode->ui_mtime), |
636 | nsec: fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_mtimensec)); |
637 | inode->i_blocks = fs64_to_cpu(sbp: sb, n: ufs2_inode->ui_blocks); |
638 | inode->i_generation = fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_gen); |
639 | ufsi->i_flags = fs32_to_cpu(sbp: sb, n: ufs2_inode->ui_flags); |
640 | /* |
641 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
642 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); |
643 | */ |
644 | |
645 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { |
646 | memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, |
647 | sizeof(ufs2_inode->ui_u2.ui_addr)); |
648 | } else { |
649 | memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, |
650 | sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); |
651 | ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; |
652 | } |
653 | return 0; |
654 | } |
655 | |
656 | struct inode *ufs_iget(struct super_block *sb, unsigned long ino) |
657 | { |
658 | struct ufs_inode_info *ufsi; |
659 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
660 | struct buffer_head * bh; |
661 | struct inode *inode; |
662 | int err = -EIO; |
663 | |
664 | UFSD("ENTER, ino %lu\n" , ino); |
665 | |
666 | if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { |
667 | ufs_warning(sb, "ufs_read_inode" , "bad inode number (%lu)\n" , |
668 | ino); |
669 | return ERR_PTR(error: -EIO); |
670 | } |
671 | |
672 | inode = iget_locked(sb, ino); |
673 | if (!inode) |
674 | return ERR_PTR(error: -ENOMEM); |
675 | if (!(inode->i_state & I_NEW)) |
676 | return inode; |
677 | |
678 | ufsi = UFS_I(inode); |
679 | |
680 | bh = sb_bread(sb, block: uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); |
681 | if (!bh) { |
682 | ufs_warning(sb, "ufs_read_inode" , "unable to read inode %lu\n" , |
683 | inode->i_ino); |
684 | goto bad_inode; |
685 | } |
686 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
687 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; |
688 | |
689 | err = ufs2_read_inode(inode, |
690 | ufs2_inode: ufs2_inode + ufs_inotofsbo(inode->i_ino)); |
691 | } else { |
692 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; |
693 | |
694 | err = ufs1_read_inode(inode, |
695 | ufs_inode: ufs_inode + ufs_inotofsbo(inode->i_ino)); |
696 | } |
697 | brelse(bh); |
698 | if (err) |
699 | goto bad_inode; |
700 | |
701 | inode_inc_iversion(inode); |
702 | ufsi->i_lastfrag = |
703 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; |
704 | ufsi->i_dir_start_lookup = 0; |
705 | ufsi->i_osync = 0; |
706 | |
707 | ufs_set_inode_ops(inode); |
708 | |
709 | UFSD("EXIT\n" ); |
710 | unlock_new_inode(inode); |
711 | return inode; |
712 | |
713 | bad_inode: |
714 | iget_failed(inode); |
715 | return ERR_PTR(error: err); |
716 | } |
717 | |
718 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
719 | { |
720 | struct super_block *sb = inode->i_sb; |
721 | struct ufs_inode_info *ufsi = UFS_I(inode); |
722 | |
723 | ufs_inode->ui_mode = cpu_to_fs16(sbp: sb, n: inode->i_mode); |
724 | ufs_inode->ui_nlink = cpu_to_fs16(sbp: sb, n: inode->i_nlink); |
725 | |
726 | ufs_set_inode_uid(sb, inode: ufs_inode, value: i_uid_read(inode)); |
727 | ufs_set_inode_gid(sb, inode: ufs_inode, value: i_gid_read(inode)); |
728 | |
729 | ufs_inode->ui_size = cpu_to_fs64(sbp: sb, n: inode->i_size); |
730 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sbp: sb, |
731 | n: inode_get_atime_sec(inode)); |
732 | ufs_inode->ui_atime.tv_usec = 0; |
733 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sbp: sb, |
734 | n: inode_get_ctime_sec(inode)); |
735 | ufs_inode->ui_ctime.tv_usec = 0; |
736 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sbp: sb, |
737 | n: inode_get_mtime_sec(inode)); |
738 | ufs_inode->ui_mtime.tv_usec = 0; |
739 | ufs_inode->ui_blocks = cpu_to_fs32(sbp: sb, n: inode->i_blocks); |
740 | ufs_inode->ui_flags = cpu_to_fs32(sbp: sb, n: ufsi->i_flags); |
741 | ufs_inode->ui_gen = cpu_to_fs32(sbp: sb, n: inode->i_generation); |
742 | |
743 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
744 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sbp: sb, n: ufsi->i_shadow); |
745 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sbp: sb, n: ufsi->i_oeftflag); |
746 | } |
747 | |
748 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
749 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ |
750 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; |
751 | } else if (inode->i_blocks) { |
752 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, |
753 | sizeof(ufs_inode->ui_u2.ui_addr)); |
754 | } |
755 | else { |
756 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
757 | sizeof(ufs_inode->ui_u2.ui_symlink)); |
758 | } |
759 | |
760 | if (!inode->i_nlink) |
761 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); |
762 | } |
763 | |
764 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) |
765 | { |
766 | struct super_block *sb = inode->i_sb; |
767 | struct ufs_inode_info *ufsi = UFS_I(inode); |
768 | |
769 | UFSD("ENTER\n" ); |
770 | ufs_inode->ui_mode = cpu_to_fs16(sbp: sb, n: inode->i_mode); |
771 | ufs_inode->ui_nlink = cpu_to_fs16(sbp: sb, n: inode->i_nlink); |
772 | |
773 | ufs_inode->ui_uid = cpu_to_fs32(sbp: sb, n: i_uid_read(inode)); |
774 | ufs_inode->ui_gid = cpu_to_fs32(sbp: sb, n: i_gid_read(inode)); |
775 | |
776 | ufs_inode->ui_size = cpu_to_fs64(sbp: sb, n: inode->i_size); |
777 | ufs_inode->ui_atime = cpu_to_fs64(sbp: sb, n: inode_get_atime_sec(inode)); |
778 | ufs_inode->ui_atimensec = cpu_to_fs32(sbp: sb, |
779 | n: inode_get_atime_nsec(inode)); |
780 | ufs_inode->ui_ctime = cpu_to_fs64(sbp: sb, n: inode_get_ctime_sec(inode)); |
781 | ufs_inode->ui_ctimensec = cpu_to_fs32(sbp: sb, |
782 | n: inode_get_ctime_nsec(inode)); |
783 | ufs_inode->ui_mtime = cpu_to_fs64(sbp: sb, n: inode_get_mtime_sec(inode)); |
784 | ufs_inode->ui_mtimensec = cpu_to_fs32(sbp: sb, |
785 | n: inode_get_mtime_nsec(inode)); |
786 | |
787 | ufs_inode->ui_blocks = cpu_to_fs64(sbp: sb, n: inode->i_blocks); |
788 | ufs_inode->ui_flags = cpu_to_fs32(sbp: sb, n: ufsi->i_flags); |
789 | ufs_inode->ui_gen = cpu_to_fs32(sbp: sb, n: inode->i_generation); |
790 | |
791 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
792 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ |
793 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; |
794 | } else if (inode->i_blocks) { |
795 | memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, |
796 | sizeof(ufs_inode->ui_u2.ui_addr)); |
797 | } else { |
798 | memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, |
799 | sizeof(ufs_inode->ui_u2.ui_symlink)); |
800 | } |
801 | |
802 | if (!inode->i_nlink) |
803 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); |
804 | UFSD("EXIT\n" ); |
805 | } |
806 | |
807 | static int ufs_update_inode(struct inode * inode, int do_sync) |
808 | { |
809 | struct super_block *sb = inode->i_sb; |
810 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
811 | struct buffer_head * bh; |
812 | |
813 | UFSD("ENTER, ino %lu\n" , inode->i_ino); |
814 | |
815 | if (inode->i_ino < UFS_ROOTINO || |
816 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { |
817 | ufs_warning (sb, "ufs_read_inode" , "bad inode number (%lu)\n" , inode->i_ino); |
818 | return -1; |
819 | } |
820 | |
821 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); |
822 | if (!bh) { |
823 | ufs_warning (sb, "ufs_read_inode" , "unable to read inode %lu\n" , inode->i_ino); |
824 | return -1; |
825 | } |
826 | if (uspi->fs_magic == UFS2_MAGIC) { |
827 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; |
828 | |
829 | ufs2_update_inode(inode, |
830 | ufs_inode: ufs2_inode + ufs_inotofsbo(inode->i_ino)); |
831 | } else { |
832 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; |
833 | |
834 | ufs1_update_inode(inode, ufs_inode: ufs_inode + ufs_inotofsbo(inode->i_ino)); |
835 | } |
836 | |
837 | mark_buffer_dirty(bh); |
838 | if (do_sync) |
839 | sync_dirty_buffer(bh); |
840 | brelse (bh); |
841 | |
842 | UFSD("EXIT\n" ); |
843 | return 0; |
844 | } |
845 | |
846 | int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) |
847 | { |
848 | return ufs_update_inode(inode, do_sync: wbc->sync_mode == WB_SYNC_ALL); |
849 | } |
850 | |
851 | int ufs_sync_inode (struct inode *inode) |
852 | { |
853 | return ufs_update_inode (inode, do_sync: 1); |
854 | } |
855 | |
856 | void ufs_evict_inode(struct inode * inode) |
857 | { |
858 | int want_delete = 0; |
859 | |
860 | if (!inode->i_nlink && !is_bad_inode(inode)) |
861 | want_delete = 1; |
862 | |
863 | truncate_inode_pages_final(&inode->i_data); |
864 | if (want_delete) { |
865 | inode->i_size = 0; |
866 | if (inode->i_blocks && |
867 | (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
868 | S_ISLNK(inode->i_mode))) |
869 | ufs_truncate_blocks(inode); |
870 | ufs_update_inode(inode, do_sync: inode_needs_sync(inode)); |
871 | } |
872 | |
873 | invalidate_inode_buffers(inode); |
874 | clear_inode(inode); |
875 | |
876 | if (want_delete) |
877 | ufs_free_inode(inode); |
878 | } |
879 | |
880 | struct to_free { |
881 | struct inode *inode; |
882 | u64 to; |
883 | unsigned count; |
884 | }; |
885 | |
886 | static inline void free_data(struct to_free *ctx, u64 from, unsigned count) |
887 | { |
888 | if (ctx->count && ctx->to != from) { |
889 | ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); |
890 | ctx->count = 0; |
891 | } |
892 | ctx->count += count; |
893 | ctx->to = from + count; |
894 | } |
895 | |
896 | #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) |
897 | |
898 | static void ufs_trunc_direct(struct inode *inode) |
899 | { |
900 | struct ufs_inode_info *ufsi = UFS_I(inode); |
901 | struct super_block * sb; |
902 | struct ufs_sb_private_info * uspi; |
903 | void *p; |
904 | u64 frag1, frag2, frag3, frag4, block1, block2; |
905 | struct to_free ctx = {.inode = inode}; |
906 | unsigned i, tmp; |
907 | |
908 | UFSD("ENTER: ino %lu\n" , inode->i_ino); |
909 | |
910 | sb = inode->i_sb; |
911 | uspi = UFS_SB(sb)->s_uspi; |
912 | |
913 | frag1 = DIRECT_FRAGMENT; |
914 | frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); |
915 | frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); |
916 | frag3 = frag4 & ~uspi->s_fpbmask; |
917 | block1 = block2 = 0; |
918 | if (frag2 > frag3) { |
919 | frag2 = frag4; |
920 | frag3 = frag4 = 0; |
921 | } else if (frag2 < frag3) { |
922 | block1 = ufs_fragstoblks (frag2); |
923 | block2 = ufs_fragstoblks (frag3); |
924 | } |
925 | |
926 | UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," |
927 | " frag3 %llu, frag4 %llu\n" , inode->i_ino, |
928 | (unsigned long long)frag1, (unsigned long long)frag2, |
929 | (unsigned long long)block1, (unsigned long long)block2, |
930 | (unsigned long long)frag3, (unsigned long long)frag4); |
931 | |
932 | if (frag1 >= frag2) |
933 | goto next1; |
934 | |
935 | /* |
936 | * Free first free fragments |
937 | */ |
938 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); |
939 | tmp = ufs_data_ptr_to_cpu(sb, p); |
940 | if (!tmp ) |
941 | ufs_panic (sb, "ufs_trunc_direct" , "internal error" ); |
942 | frag2 -= frag1; |
943 | frag1 = ufs_fragnum (frag1); |
944 | |
945 | ufs_free_fragments(inode, tmp + frag1, frag2); |
946 | |
947 | next1: |
948 | /* |
949 | * Free whole blocks |
950 | */ |
951 | for (i = block1 ; i < block2; i++) { |
952 | p = ufs_get_direct_data_ptr(uspi, ufsi, blk: i); |
953 | tmp = ufs_data_ptr_to_cpu(sb, p); |
954 | if (!tmp) |
955 | continue; |
956 | write_seqlock(sl: &ufsi->meta_lock); |
957 | ufs_data_ptr_clear(uspi, p); |
958 | write_sequnlock(sl: &ufsi->meta_lock); |
959 | |
960 | free_data(ctx: &ctx, from: tmp, count: uspi->s_fpb); |
961 | } |
962 | |
963 | free_data(ctx: &ctx, from: 0, count: 0); |
964 | |
965 | if (frag3 >= frag4) |
966 | goto next3; |
967 | |
968 | /* |
969 | * Free last free fragments |
970 | */ |
971 | p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); |
972 | tmp = ufs_data_ptr_to_cpu(sb, p); |
973 | if (!tmp ) |
974 | ufs_panic(sb, "ufs_truncate_direct" , "internal error" ); |
975 | frag4 = ufs_fragnum (frag4); |
976 | write_seqlock(sl: &ufsi->meta_lock); |
977 | ufs_data_ptr_clear(uspi, p); |
978 | write_sequnlock(sl: &ufsi->meta_lock); |
979 | |
980 | ufs_free_fragments (inode, tmp, frag4); |
981 | next3: |
982 | |
983 | UFSD("EXIT: ino %lu\n" , inode->i_ino); |
984 | } |
985 | |
986 | static void free_full_branch(struct inode *inode, u64 ind_block, int depth) |
987 | { |
988 | struct super_block *sb = inode->i_sb; |
989 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
990 | struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); |
991 | unsigned i; |
992 | |
993 | if (!ubh) |
994 | return; |
995 | |
996 | if (--depth) { |
997 | for (i = 0; i < uspi->s_apb; i++) { |
998 | void *p = ubh_get_data_ptr(uspi, ubh, blk: i); |
999 | u64 block = ufs_data_ptr_to_cpu(sb, p); |
1000 | if (block) |
1001 | free_full_branch(inode, ind_block: block, depth); |
1002 | } |
1003 | } else { |
1004 | struct to_free ctx = {.inode = inode}; |
1005 | |
1006 | for (i = 0; i < uspi->s_apb; i++) { |
1007 | void *p = ubh_get_data_ptr(uspi, ubh, blk: i); |
1008 | u64 block = ufs_data_ptr_to_cpu(sb, p); |
1009 | if (block) |
1010 | free_data(ctx: &ctx, from: block, count: uspi->s_fpb); |
1011 | } |
1012 | free_data(ctx: &ctx, from: 0, count: 0); |
1013 | } |
1014 | |
1015 | ubh_bforget(ubh); |
1016 | ufs_free_blocks(inode, ind_block, uspi->s_fpb); |
1017 | } |
1018 | |
1019 | static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) |
1020 | { |
1021 | struct super_block *sb = inode->i_sb; |
1022 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
1023 | unsigned i; |
1024 | |
1025 | if (--depth) { |
1026 | for (i = from; i < uspi->s_apb ; i++) { |
1027 | void *p = ubh_get_data_ptr(uspi, ubh, blk: i); |
1028 | u64 block = ufs_data_ptr_to_cpu(sb, p); |
1029 | if (block) { |
1030 | write_seqlock(sl: &UFS_I(inode)->meta_lock); |
1031 | ufs_data_ptr_clear(uspi, p); |
1032 | write_sequnlock(sl: &UFS_I(inode)->meta_lock); |
1033 | ubh_mark_buffer_dirty(ubh); |
1034 | free_full_branch(inode, ind_block: block, depth); |
1035 | } |
1036 | } |
1037 | } else { |
1038 | struct to_free ctx = {.inode = inode}; |
1039 | |
1040 | for (i = from; i < uspi->s_apb; i++) { |
1041 | void *p = ubh_get_data_ptr(uspi, ubh, blk: i); |
1042 | u64 block = ufs_data_ptr_to_cpu(sb, p); |
1043 | if (block) { |
1044 | write_seqlock(sl: &UFS_I(inode)->meta_lock); |
1045 | ufs_data_ptr_clear(uspi, p); |
1046 | write_sequnlock(sl: &UFS_I(inode)->meta_lock); |
1047 | ubh_mark_buffer_dirty(ubh); |
1048 | free_data(ctx: &ctx, from: block, count: uspi->s_fpb); |
1049 | } |
1050 | } |
1051 | free_data(ctx: &ctx, from: 0, count: 0); |
1052 | } |
1053 | if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) |
1054 | ubh_sync_block(ubh); |
1055 | ubh_brelse(ubh); |
1056 | } |
1057 | |
1058 | static int ufs_alloc_lastblock(struct inode *inode, loff_t size) |
1059 | { |
1060 | int err = 0; |
1061 | struct super_block *sb = inode->i_sb; |
1062 | struct address_space *mapping = inode->i_mapping; |
1063 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
1064 | unsigned i, end; |
1065 | sector_t lastfrag; |
1066 | struct folio *folio; |
1067 | struct buffer_head *bh; |
1068 | u64 phys64; |
1069 | |
1070 | lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
1071 | |
1072 | if (!lastfrag) |
1073 | goto out; |
1074 | |
1075 | lastfrag--; |
1076 | |
1077 | folio = ufs_get_locked_folio(mapping, index: lastfrag >> |
1078 | (PAGE_SHIFT - inode->i_blkbits)); |
1079 | if (IS_ERR(ptr: folio)) { |
1080 | err = -EIO; |
1081 | goto out; |
1082 | } |
1083 | |
1084 | end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); |
1085 | bh = folio_buffers(folio); |
1086 | for (i = 0; i < end; ++i) |
1087 | bh = bh->b_this_page; |
1088 | |
1089 | err = ufs_getfrag_block(inode, fragment: lastfrag, bh_result: bh, create: 1); |
1090 | |
1091 | if (unlikely(err)) |
1092 | goto out_unlock; |
1093 | |
1094 | if (buffer_new(bh)) { |
1095 | clear_buffer_new(bh); |
1096 | clean_bdev_bh_alias(bh); |
1097 | /* |
1098 | * we do not zeroize fragment, because of |
1099 | * if it maped to hole, it already contains zeroes |
1100 | */ |
1101 | set_buffer_uptodate(bh); |
1102 | mark_buffer_dirty(bh); |
1103 | folio_mark_dirty(folio); |
1104 | } |
1105 | |
1106 | if (lastfrag >= UFS_IND_FRAGMENT) { |
1107 | end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; |
1108 | phys64 = bh->b_blocknr + 1; |
1109 | for (i = 0; i < end; ++i) { |
1110 | bh = sb_getblk(sb, block: i + phys64); |
1111 | lock_buffer(bh); |
1112 | memset(bh->b_data, 0, sb->s_blocksize); |
1113 | set_buffer_uptodate(bh); |
1114 | mark_buffer_dirty(bh); |
1115 | unlock_buffer(bh); |
1116 | sync_dirty_buffer(bh); |
1117 | brelse(bh); |
1118 | } |
1119 | } |
1120 | out_unlock: |
1121 | ufs_put_locked_folio(folio); |
1122 | out: |
1123 | return err; |
1124 | } |
1125 | |
1126 | static void ufs_truncate_blocks(struct inode *inode) |
1127 | { |
1128 | struct ufs_inode_info *ufsi = UFS_I(inode); |
1129 | struct super_block *sb = inode->i_sb; |
1130 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
1131 | unsigned offsets[4]; |
1132 | int depth; |
1133 | int depth2; |
1134 | unsigned i; |
1135 | struct ufs_buffer_head *ubh[3]; |
1136 | void *p; |
1137 | u64 block; |
1138 | |
1139 | if (inode->i_size) { |
1140 | sector_t last = (inode->i_size - 1) >> uspi->s_bshift; |
1141 | depth = ufs_block_to_path(inode, i_block: last, offsets); |
1142 | if (!depth) |
1143 | return; |
1144 | } else { |
1145 | depth = 1; |
1146 | } |
1147 | |
1148 | for (depth2 = depth - 1; depth2; depth2--) |
1149 | if (offsets[depth2] != uspi->s_apb - 1) |
1150 | break; |
1151 | |
1152 | mutex_lock(&ufsi->truncate_mutex); |
1153 | if (depth == 1) { |
1154 | ufs_trunc_direct(inode); |
1155 | offsets[0] = UFS_IND_BLOCK; |
1156 | } else { |
1157 | /* get the blocks that should be partially emptied */ |
1158 | p = ufs_get_direct_data_ptr(uspi, ufsi, blk: offsets[0]++); |
1159 | for (i = 0; i < depth2; i++) { |
1160 | block = ufs_data_ptr_to_cpu(sb, p); |
1161 | if (!block) |
1162 | break; |
1163 | ubh[i] = ubh_bread(sb, block, uspi->s_bsize); |
1164 | if (!ubh[i]) { |
1165 | write_seqlock(sl: &ufsi->meta_lock); |
1166 | ufs_data_ptr_clear(uspi, p); |
1167 | write_sequnlock(sl: &ufsi->meta_lock); |
1168 | break; |
1169 | } |
1170 | p = ubh_get_data_ptr(uspi, ubh: ubh[i], blk: offsets[i + 1]++); |
1171 | } |
1172 | while (i--) |
1173 | free_branch_tail(inode, from: offsets[i + 1], ubh: ubh[i], depth: depth - i - 1); |
1174 | } |
1175 | for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { |
1176 | p = ufs_get_direct_data_ptr(uspi, ufsi, blk: i); |
1177 | block = ufs_data_ptr_to_cpu(sb, p); |
1178 | if (block) { |
1179 | write_seqlock(sl: &ufsi->meta_lock); |
1180 | ufs_data_ptr_clear(uspi, p); |
1181 | write_sequnlock(sl: &ufsi->meta_lock); |
1182 | free_full_branch(inode, ind_block: block, depth: i - UFS_IND_BLOCK + 1); |
1183 | } |
1184 | } |
1185 | read_seqlock_excl(sl: &ufsi->meta_lock); |
1186 | ufsi->i_lastfrag = DIRECT_FRAGMENT; |
1187 | read_sequnlock_excl(sl: &ufsi->meta_lock); |
1188 | mark_inode_dirty(inode); |
1189 | mutex_unlock(lock: &ufsi->truncate_mutex); |
1190 | } |
1191 | |
1192 | static int ufs_truncate(struct inode *inode, loff_t size) |
1193 | { |
1194 | int err = 0; |
1195 | |
1196 | UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n" , |
1197 | inode->i_ino, (unsigned long long)size, |
1198 | (unsigned long long)i_size_read(inode)); |
1199 | |
1200 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
1201 | S_ISLNK(inode->i_mode))) |
1202 | return -EINVAL; |
1203 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
1204 | return -EPERM; |
1205 | |
1206 | err = ufs_alloc_lastblock(inode, size); |
1207 | |
1208 | if (err) |
1209 | goto out; |
1210 | |
1211 | block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); |
1212 | |
1213 | truncate_setsize(inode, newsize: size); |
1214 | |
1215 | ufs_truncate_blocks(inode); |
1216 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
1217 | mark_inode_dirty(inode); |
1218 | out: |
1219 | UFSD("EXIT: err %d\n" , err); |
1220 | return err; |
1221 | } |
1222 | |
1223 | int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
1224 | struct iattr *attr) |
1225 | { |
1226 | struct inode *inode = d_inode(dentry); |
1227 | unsigned int ia_valid = attr->ia_valid; |
1228 | int error; |
1229 | |
1230 | error = setattr_prepare(&nop_mnt_idmap, dentry, attr); |
1231 | if (error) |
1232 | return error; |
1233 | |
1234 | if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { |
1235 | error = ufs_truncate(inode, size: attr->ia_size); |
1236 | if (error) |
1237 | return error; |
1238 | } |
1239 | |
1240 | setattr_copy(&nop_mnt_idmap, inode, attr); |
1241 | mark_inode_dirty(inode); |
1242 | return 0; |
1243 | } |
1244 | |
1245 | const struct inode_operations ufs_file_inode_operations = { |
1246 | .setattr = ufs_setattr, |
1247 | }; |
1248 | |