Commit | Line | Data |
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f5166768 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
67cf5b09 TM |
2 | /* |
3 | * Copyright (c) 2012 Taobao. | |
4 | * Written by Tao Ma <boyu.mt@taobao.com> | |
67cf5b09 | 5 | */ |
4bdfc873 | 6 | |
7046ae35 | 7 | #include <linux/iomap.h> |
4bdfc873 | 8 | #include <linux/fiemap.h> |
5a57bca9 | 9 | #include <linux/namei.h> |
ee73f9a5 | 10 | #include <linux/iversion.h> |
4034247a | 11 | #include <linux/sched/mm.h> |
4bdfc873 | 12 | |
67cf5b09 TM |
13 | #include "ext4_jbd2.h" |
14 | #include "ext4.h" | |
15 | #include "xattr.h" | |
f19d5870 | 16 | #include "truncate.h" |
67cf5b09 TM |
17 | |
18 | #define EXT4_XATTR_SYSTEM_DATA "data" | |
19 | #define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__le32) * EXT4_N_BLOCKS)) | |
8af0f082 TM |
20 | #define EXT4_INLINE_DOTDOT_OFFSET 2 |
21 | #define EXT4_INLINE_DOTDOT_SIZE 4 | |
67cf5b09 | 22 | |
c197855e | 23 | static int ext4_get_inline_size(struct inode *inode) |
67cf5b09 TM |
24 | { |
25 | if (EXT4_I(inode)->i_inline_off) | |
26 | return EXT4_I(inode)->i_inline_size; | |
27 | ||
28 | return 0; | |
29 | } | |
30 | ||
31 | static int get_max_inline_xattr_value_size(struct inode *inode, | |
32 | struct ext4_iloc *iloc) | |
33 | { | |
34 | struct ext4_xattr_ibody_header *header; | |
35 | struct ext4_xattr_entry *entry; | |
36 | struct ext4_inode *raw_inode; | |
2220eaf9 | 37 | void *end; |
67cf5b09 TM |
38 | int free, min_offs; |
39 | ||
c9fd167d BL |
40 | if (!EXT4_INODE_HAS_XATTR_SPACE(inode)) |
41 | return 0; | |
42 | ||
67cf5b09 TM |
43 | min_offs = EXT4_SB(inode->i_sb)->s_inode_size - |
44 | EXT4_GOOD_OLD_INODE_SIZE - | |
45 | EXT4_I(inode)->i_extra_isize - | |
46 | sizeof(struct ext4_xattr_ibody_header); | |
47 | ||
48 | /* | |
49 | * We need to subtract another sizeof(__u32) since an in-inode xattr | |
50 | * needs an empty 4 bytes to indicate the gap between the xattr entry | |
51 | * and the name/value pair. | |
52 | */ | |
53 | if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR)) | |
54 | return EXT4_XATTR_SIZE(min_offs - | |
55 | EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) - | |
56 | EXT4_XATTR_ROUND - sizeof(__u32)); | |
57 | ||
58 | raw_inode = ext4_raw_inode(iloc); | |
59 | header = IHDR(inode, raw_inode); | |
60 | entry = IFIRST(header); | |
2220eaf9 | 61 | end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; |
67cf5b09 TM |
62 | |
63 | /* Compute min_offs. */ | |
2220eaf9 TT |
64 | while (!IS_LAST_ENTRY(entry)) { |
65 | void *next = EXT4_XATTR_NEXT(entry); | |
66 | ||
67 | if (next >= end) { | |
68 | EXT4_ERROR_INODE(inode, | |
69 | "corrupt xattr in inline inode"); | |
70 | return 0; | |
71 | } | |
e50e5129 | 72 | if (!entry->e_value_inum && entry->e_value_size) { |
67cf5b09 TM |
73 | size_t offs = le16_to_cpu(entry->e_value_offs); |
74 | if (offs < min_offs) | |
75 | min_offs = offs; | |
76 | } | |
2220eaf9 | 77 | entry = next; |
67cf5b09 TM |
78 | } |
79 | free = min_offs - | |
80 | ((void *)entry - (void *)IFIRST(header)) - sizeof(__u32); | |
81 | ||
82 | if (EXT4_I(inode)->i_inline_off) { | |
83 | entry = (struct ext4_xattr_entry *) | |
84 | ((void *)raw_inode + EXT4_I(inode)->i_inline_off); | |
85 | ||
c4932dbe | 86 | free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)); |
67cf5b09 TM |
87 | goto out; |
88 | } | |
89 | ||
90 | free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)); | |
91 | ||
92 | if (free > EXT4_XATTR_ROUND) | |
93 | free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND); | |
94 | else | |
95 | free = 0; | |
96 | ||
97 | out: | |
98 | return free; | |
99 | } | |
100 | ||
101 | /* | |
102 | * Get the maximum size we now can store in an inode. | |
103 | * If we can't find the space for a xattr entry, don't use the space | |
104 | * of the extents since we have no space to indicate the inline data. | |
105 | */ | |
106 | int ext4_get_max_inline_size(struct inode *inode) | |
107 | { | |
108 | int error, max_inline_size; | |
109 | struct ext4_iloc iloc; | |
110 | ||
111 | if (EXT4_I(inode)->i_extra_isize == 0) | |
112 | return 0; | |
113 | ||
114 | error = ext4_get_inode_loc(inode, &iloc); | |
115 | if (error) { | |
54d3adbc TT |
116 | ext4_error_inode_err(inode, __func__, __LINE__, 0, -error, |
117 | "can't get inode location %lu", | |
118 | inode->i_ino); | |
67cf5b09 TM |
119 | return 0; |
120 | } | |
121 | ||
122 | down_read(&EXT4_I(inode)->xattr_sem); | |
123 | max_inline_size = get_max_inline_xattr_value_size(inode, &iloc); | |
124 | up_read(&EXT4_I(inode)->xattr_sem); | |
125 | ||
126 | brelse(iloc.bh); | |
127 | ||
128 | if (!max_inline_size) | |
129 | return 0; | |
130 | ||
131 | return max_inline_size + EXT4_MIN_INLINE_DATA_SIZE; | |
132 | } | |
133 | ||
67cf5b09 TM |
134 | /* |
135 | * this function does not take xattr_sem, which is OK because it is | |
136 | * currently only used in a code path coming form ext4_iget, before | |
137 | * the new inode has been unlocked | |
138 | */ | |
139 | int ext4_find_inline_data_nolock(struct inode *inode) | |
140 | { | |
141 | struct ext4_xattr_ibody_find is = { | |
142 | .s = { .not_found = -ENODATA, }, | |
143 | }; | |
144 | struct ext4_xattr_info i = { | |
145 | .name_index = EXT4_XATTR_INDEX_SYSTEM, | |
146 | .name = EXT4_XATTR_SYSTEM_DATA, | |
147 | }; | |
148 | int error; | |
149 | ||
150 | if (EXT4_I(inode)->i_extra_isize == 0) | |
151 | return 0; | |
152 | ||
153 | error = ext4_get_inode_loc(inode, &is.iloc); | |
154 | if (error) | |
155 | return error; | |
156 | ||
157 | error = ext4_xattr_ibody_find(inode, &i, &is); | |
158 | if (error) | |
159 | goto out; | |
160 | ||
161 | if (!is.s.not_found) { | |
117166ef TT |
162 | if (is.s.here->e_value_inum) { |
163 | EXT4_ERROR_INODE(inode, "inline data xattr refers " | |
164 | "to an external xattr inode"); | |
165 | error = -EFSCORRUPTED; | |
166 | goto out; | |
167 | } | |
67cf5b09 TM |
168 | EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - |
169 | (void *)ext4_raw_inode(&is.iloc)); | |
170 | EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE + | |
171 | le32_to_cpu(is.s.here->e_value_size); | |
67cf5b09 TM |
172 | } |
173 | out: | |
174 | brelse(is.iloc.bh); | |
175 | return error; | |
176 | } | |
177 | ||
178 | static int ext4_read_inline_data(struct inode *inode, void *buffer, | |
179 | unsigned int len, | |
180 | struct ext4_iloc *iloc) | |
181 | { | |
182 | struct ext4_xattr_entry *entry; | |
183 | struct ext4_xattr_ibody_header *header; | |
184 | int cp_len = 0; | |
185 | struct ext4_inode *raw_inode; | |
186 | ||
187 | if (!len) | |
188 | return 0; | |
189 | ||
190 | BUG_ON(len > EXT4_I(inode)->i_inline_size); | |
191 | ||
66267814 | 192 | cp_len = min_t(unsigned int, len, EXT4_MIN_INLINE_DATA_SIZE); |
67cf5b09 TM |
193 | |
194 | raw_inode = ext4_raw_inode(iloc); | |
195 | memcpy(buffer, (void *)(raw_inode->i_block), cp_len); | |
196 | ||
197 | len -= cp_len; | |
198 | buffer += cp_len; | |
199 | ||
200 | if (!len) | |
201 | goto out; | |
202 | ||
203 | header = IHDR(inode, raw_inode); | |
204 | entry = (struct ext4_xattr_entry *)((void *)raw_inode + | |
205 | EXT4_I(inode)->i_inline_off); | |
206 | len = min_t(unsigned int, len, | |
207 | (unsigned int)le32_to_cpu(entry->e_value_size)); | |
208 | ||
209 | memcpy(buffer, | |
210 | (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs), len); | |
211 | cp_len += len; | |
212 | ||
213 | out: | |
214 | return cp_len; | |
215 | } | |
216 | ||
217 | /* | |
218 | * write the buffer to the inline inode. | |
219 | * If 'create' is set, we don't need to do the extra copy in the xattr | |
310c097c | 220 | * value since it is already handled by ext4_xattr_ibody_set. |
0d812f77 | 221 | * That saves us one memcpy. |
67cf5b09 | 222 | */ |
c197855e SH |
223 | static void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc, |
224 | void *buffer, loff_t pos, unsigned int len) | |
67cf5b09 TM |
225 | { |
226 | struct ext4_xattr_entry *entry; | |
227 | struct ext4_xattr_ibody_header *header; | |
228 | struct ext4_inode *raw_inode; | |
229 | int cp_len = 0; | |
230 | ||
0db1ff22 TT |
231 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
232 | return; | |
233 | ||
67cf5b09 TM |
234 | BUG_ON(!EXT4_I(inode)->i_inline_off); |
235 | BUG_ON(pos + len > EXT4_I(inode)->i_inline_size); | |
236 | ||
237 | raw_inode = ext4_raw_inode(iloc); | |
238 | buffer += pos; | |
239 | ||
240 | if (pos < EXT4_MIN_INLINE_DATA_SIZE) { | |
241 | cp_len = pos + len > EXT4_MIN_INLINE_DATA_SIZE ? | |
242 | EXT4_MIN_INLINE_DATA_SIZE - pos : len; | |
243 | memcpy((void *)raw_inode->i_block + pos, buffer, cp_len); | |
244 | ||
245 | len -= cp_len; | |
246 | buffer += cp_len; | |
247 | pos += cp_len; | |
248 | } | |
249 | ||
250 | if (!len) | |
251 | return; | |
252 | ||
253 | pos -= EXT4_MIN_INLINE_DATA_SIZE; | |
254 | header = IHDR(inode, raw_inode); | |
255 | entry = (struct ext4_xattr_entry *)((void *)raw_inode + | |
256 | EXT4_I(inode)->i_inline_off); | |
257 | ||
258 | memcpy((void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs) + pos, | |
259 | buffer, len); | |
260 | } | |
261 | ||
262 | static int ext4_create_inline_data(handle_t *handle, | |
263 | struct inode *inode, unsigned len) | |
264 | { | |
265 | int error; | |
266 | void *value = NULL; | |
267 | struct ext4_xattr_ibody_find is = { | |
268 | .s = { .not_found = -ENODATA, }, | |
269 | }; | |
270 | struct ext4_xattr_info i = { | |
271 | .name_index = EXT4_XATTR_INDEX_SYSTEM, | |
272 | .name = EXT4_XATTR_SYSTEM_DATA, | |
273 | }; | |
274 | ||
275 | error = ext4_get_inode_loc(inode, &is.iloc); | |
276 | if (error) | |
277 | return error; | |
278 | ||
5d601255 | 279 | BUFFER_TRACE(is.iloc.bh, "get_write_access"); |
188c299e JK |
280 | error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh, |
281 | EXT4_JTR_NONE); | |
67cf5b09 TM |
282 | if (error) |
283 | goto out; | |
284 | ||
285 | if (len > EXT4_MIN_INLINE_DATA_SIZE) { | |
bd9926e8 | 286 | value = EXT4_ZERO_XATTR_VALUE; |
67cf5b09 TM |
287 | len -= EXT4_MIN_INLINE_DATA_SIZE; |
288 | } else { | |
289 | value = ""; | |
290 | len = 0; | |
291 | } | |
292 | ||
7ca4fcba | 293 | /* Insert the xttr entry. */ |
67cf5b09 TM |
294 | i.value = value; |
295 | i.value_len = len; | |
296 | ||
297 | error = ext4_xattr_ibody_find(inode, &i, &is); | |
298 | if (error) | |
299 | goto out; | |
300 | ||
301 | BUG_ON(!is.s.not_found); | |
302 | ||
310c097c | 303 | error = ext4_xattr_ibody_set(handle, inode, &i, &is); |
67cf5b09 TM |
304 | if (error) { |
305 | if (error == -ENOSPC) | |
306 | ext4_clear_inode_state(inode, | |
307 | EXT4_STATE_MAY_INLINE_DATA); | |
308 | goto out; | |
309 | } | |
310 | ||
311 | memset((void *)ext4_raw_inode(&is.iloc)->i_block, | |
312 | 0, EXT4_MIN_INLINE_DATA_SIZE); | |
313 | ||
314 | EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - | |
315 | (void *)ext4_raw_inode(&is.iloc)); | |
316 | EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE; | |
317 | ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); | |
318 | ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); | |
319 | get_bh(is.iloc.bh); | |
320 | error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); | |
321 | ||
322 | out: | |
323 | brelse(is.iloc.bh); | |
324 | return error; | |
325 | } | |
326 | ||
327 | static int ext4_update_inline_data(handle_t *handle, struct inode *inode, | |
328 | unsigned int len) | |
329 | { | |
330 | int error; | |
331 | void *value = NULL; | |
332 | struct ext4_xattr_ibody_find is = { | |
333 | .s = { .not_found = -ENODATA, }, | |
334 | }; | |
335 | struct ext4_xattr_info i = { | |
336 | .name_index = EXT4_XATTR_INDEX_SYSTEM, | |
337 | .name = EXT4_XATTR_SYSTEM_DATA, | |
338 | }; | |
339 | ||
340 | /* If the old space is ok, write the data directly. */ | |
341 | if (len <= EXT4_I(inode)->i_inline_size) | |
342 | return 0; | |
343 | ||
344 | error = ext4_get_inode_loc(inode, &is.iloc); | |
345 | if (error) | |
346 | return error; | |
347 | ||
348 | error = ext4_xattr_ibody_find(inode, &i, &is); | |
349 | if (error) | |
350 | goto out; | |
351 | ||
352 | BUG_ON(is.s.not_found); | |
353 | ||
354 | len -= EXT4_MIN_INLINE_DATA_SIZE; | |
355 | value = kzalloc(len, GFP_NOFS); | |
578620f4 DC |
356 | if (!value) { |
357 | error = -ENOMEM; | |
67cf5b09 | 358 | goto out; |
578620f4 | 359 | } |
67cf5b09 TM |
360 | |
361 | error = ext4_xattr_ibody_get(inode, i.name_index, i.name, | |
362 | value, len); | |
363 | if (error == -ENODATA) | |
364 | goto out; | |
365 | ||
5d601255 | 366 | BUFFER_TRACE(is.iloc.bh, "get_write_access"); |
188c299e JK |
367 | error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh, |
368 | EXT4_JTR_NONE); | |
67cf5b09 TM |
369 | if (error) |
370 | goto out; | |
371 | ||
b483bb77 | 372 | /* Update the xattr entry. */ |
67cf5b09 TM |
373 | i.value = value; |
374 | i.value_len = len; | |
375 | ||
310c097c | 376 | error = ext4_xattr_ibody_set(handle, inode, &i, &is); |
67cf5b09 TM |
377 | if (error) |
378 | goto out; | |
379 | ||
380 | EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - | |
381 | (void *)ext4_raw_inode(&is.iloc)); | |
382 | EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE + | |
383 | le32_to_cpu(is.s.here->e_value_size); | |
384 | ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
385 | get_bh(is.iloc.bh); | |
386 | error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); | |
387 | ||
388 | out: | |
389 | kfree(value); | |
390 | brelse(is.iloc.bh); | |
391 | return error; | |
392 | } | |
393 | ||
c197855e SH |
394 | static int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, |
395 | unsigned int len) | |
67cf5b09 | 396 | { |
c755e251 | 397 | int ret, size, no_expand; |
67cf5b09 TM |
398 | struct ext4_inode_info *ei = EXT4_I(inode); |
399 | ||
400 | if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) | |
401 | return -ENOSPC; | |
402 | ||
403 | size = ext4_get_max_inline_size(inode); | |
404 | if (size < len) | |
405 | return -ENOSPC; | |
406 | ||
c755e251 | 407 | ext4_write_lock_xattr(inode, &no_expand); |
67cf5b09 TM |
408 | |
409 | if (ei->i_inline_off) | |
410 | ret = ext4_update_inline_data(handle, inode, len); | |
411 | else | |
412 | ret = ext4_create_inline_data(handle, inode, len); | |
413 | ||
c755e251 | 414 | ext4_write_unlock_xattr(inode, &no_expand); |
67cf5b09 TM |
415 | return ret; |
416 | } | |
417 | ||
418 | static int ext4_destroy_inline_data_nolock(handle_t *handle, | |
419 | struct inode *inode) | |
420 | { | |
421 | struct ext4_inode_info *ei = EXT4_I(inode); | |
422 | struct ext4_xattr_ibody_find is = { | |
423 | .s = { .not_found = 0, }, | |
424 | }; | |
425 | struct ext4_xattr_info i = { | |
426 | .name_index = EXT4_XATTR_INDEX_SYSTEM, | |
427 | .name = EXT4_XATTR_SYSTEM_DATA, | |
428 | .value = NULL, | |
429 | .value_len = 0, | |
430 | }; | |
431 | int error; | |
432 | ||
433 | if (!ei->i_inline_off) | |
434 | return 0; | |
435 | ||
436 | error = ext4_get_inode_loc(inode, &is.iloc); | |
437 | if (error) | |
438 | return error; | |
439 | ||
440 | error = ext4_xattr_ibody_find(inode, &i, &is); | |
441 | if (error) | |
442 | goto out; | |
443 | ||
5d601255 | 444 | BUFFER_TRACE(is.iloc.bh, "get_write_access"); |
188c299e JK |
445 | error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh, |
446 | EXT4_JTR_NONE); | |
67cf5b09 TM |
447 | if (error) |
448 | goto out; | |
449 | ||
310c097c | 450 | error = ext4_xattr_ibody_set(handle, inode, &i, &is); |
67cf5b09 TM |
451 | if (error) |
452 | goto out; | |
453 | ||
454 | memset((void *)ext4_raw_inode(&is.iloc)->i_block, | |
455 | 0, EXT4_MIN_INLINE_DATA_SIZE); | |
6e8ab72a | 456 | memset(ei->i_data, 0, EXT4_MIN_INLINE_DATA_SIZE); |
67cf5b09 | 457 | |
e2b911c5 | 458 | if (ext4_has_feature_extents(inode->i_sb)) { |
67cf5b09 TM |
459 | if (S_ISDIR(inode->i_mode) || |
460 | S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
461 | ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); | |
462 | ext4_ext_tree_init(handle, inode); | |
463 | } | |
464 | } | |
465 | ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA); | |
466 | ||
467 | get_bh(is.iloc.bh); | |
468 | error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); | |
469 | ||
470 | EXT4_I(inode)->i_inline_off = 0; | |
471 | EXT4_I(inode)->i_inline_size = 0; | |
472 | ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
473 | out: | |
474 | brelse(is.iloc.bh); | |
475 | if (error == -ENODATA) | |
476 | error = 0; | |
477 | return error; | |
478 | } | |
479 | ||
6b87fbe4 | 480 | static int ext4_read_inline_folio(struct inode *inode, struct folio *folio) |
46c7f254 TM |
481 | { |
482 | void *kaddr; | |
483 | int ret = 0; | |
484 | size_t len; | |
485 | struct ext4_iloc iloc; | |
486 | ||
6b87fbe4 | 487 | BUG_ON(!folio_test_locked(folio)); |
46c7f254 | 488 | BUG_ON(!ext4_has_inline_data(inode)); |
6b87fbe4 | 489 | BUG_ON(folio->index); |
46c7f254 TM |
490 | |
491 | if (!EXT4_I(inode)->i_inline_off) { | |
492 | ext4_warning(inode->i_sb, "inode %lu doesn't have inline data.", | |
493 | inode->i_ino); | |
494 | goto out; | |
495 | } | |
496 | ||
497 | ret = ext4_get_inode_loc(inode, &iloc); | |
498 | if (ret) | |
499 | goto out; | |
500 | ||
501 | len = min_t(size_t, ext4_get_inline_size(inode), i_size_read(inode)); | |
6b87fbe4 MW |
502 | BUG_ON(len > PAGE_SIZE); |
503 | kaddr = kmap_local_folio(folio, 0); | |
46c7f254 | 504 | ret = ext4_read_inline_data(inode, kaddr, len, &iloc); |
6b87fbe4 MW |
505 | flush_dcache_folio(folio); |
506 | kunmap_local(kaddr); | |
507 | folio_zero_segment(folio, len, folio_size(folio)); | |
508 | folio_mark_uptodate(folio); | |
46c7f254 TM |
509 | brelse(iloc.bh); |
510 | ||
511 | out: | |
512 | return ret; | |
513 | } | |
514 | ||
3edde93e | 515 | int ext4_readpage_inline(struct inode *inode, struct folio *folio) |
46c7f254 TM |
516 | { |
517 | int ret = 0; | |
518 | ||
519 | down_read(&EXT4_I(inode)->xattr_sem); | |
520 | if (!ext4_has_inline_data(inode)) { | |
521 | up_read(&EXT4_I(inode)->xattr_sem); | |
522 | return -EAGAIN; | |
523 | } | |
524 | ||
525 | /* | |
526 | * Current inline data can only exist in the 1st page, | |
527 | * So for all the other pages, just set them uptodate. | |
528 | */ | |
3edde93e | 529 | if (!folio->index) |
6b87fbe4 | 530 | ret = ext4_read_inline_folio(inode, folio); |
3edde93e MW |
531 | else if (!folio_test_uptodate(folio)) { |
532 | folio_zero_segment(folio, 0, folio_size(folio)); | |
533 | folio_mark_uptodate(folio); | |
46c7f254 TM |
534 | } |
535 | ||
536 | up_read(&EXT4_I(inode)->xattr_sem); | |
537 | ||
3edde93e | 538 | folio_unlock(folio); |
46c7f254 TM |
539 | return ret >= 0 ? 0 : ret; |
540 | } | |
541 | ||
f19d5870 | 542 | static int ext4_convert_inline_data_to_extent(struct address_space *mapping, |
832ee62d | 543 | struct inode *inode) |
f19d5870 | 544 | { |
c755e251 | 545 | int ret, needed_blocks, no_expand; |
f19d5870 TM |
546 | handle_t *handle = NULL; |
547 | int retries = 0, sem_held = 0; | |
83eba701 | 548 | struct folio *folio = NULL; |
f19d5870 TM |
549 | unsigned from, to; |
550 | struct ext4_iloc iloc; | |
551 | ||
552 | if (!ext4_has_inline_data(inode)) { | |
553 | /* | |
554 | * clear the flag so that no new write | |
555 | * will trap here again. | |
556 | */ | |
557 | ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | needed_blocks = ext4_writepage_trans_blocks(inode); | |
562 | ||
563 | ret = ext4_get_inode_loc(inode, &iloc); | |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | retry: | |
9924a92a | 568 | handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); |
f19d5870 TM |
569 | if (IS_ERR(handle)) { |
570 | ret = PTR_ERR(handle); | |
571 | handle = NULL; | |
572 | goto out; | |
573 | } | |
574 | ||
575 | /* We cannot recurse into the filesystem as the transaction is already | |
576 | * started */ | |
83eba701 MW |
577 | folio = __filemap_get_folio(mapping, 0, FGP_WRITEBEGIN | FGP_NOFS, |
578 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
579 | if (IS_ERR(folio)) { |
580 | ret = PTR_ERR(folio); | |
581 | goto out_nofolio; | |
f19d5870 TM |
582 | } |
583 | ||
c755e251 | 584 | ext4_write_lock_xattr(inode, &no_expand); |
f19d5870 TM |
585 | sem_held = 1; |
586 | /* If some one has already done this for us, just exit. */ | |
587 | if (!ext4_has_inline_data(inode)) { | |
588 | ret = 0; | |
589 | goto out; | |
590 | } | |
591 | ||
592 | from = 0; | |
593 | to = ext4_get_inline_size(inode); | |
83eba701 | 594 | if (!folio_test_uptodate(folio)) { |
6b87fbe4 | 595 | ret = ext4_read_inline_folio(inode, folio); |
f19d5870 TM |
596 | if (ret < 0) |
597 | goto out; | |
598 | } | |
599 | ||
600 | ret = ext4_destroy_inline_data_nolock(handle, inode); | |
601 | if (ret) | |
602 | goto out; | |
603 | ||
705965bd | 604 | if (ext4_should_dioread_nolock(inode)) { |
83eba701 | 605 | ret = __block_write_begin(&folio->page, from, to, |
705965bd JK |
606 | ext4_get_block_unwritten); |
607 | } else | |
83eba701 | 608 | ret = __block_write_begin(&folio->page, from, to, ext4_get_block); |
f19d5870 TM |
609 | |
610 | if (!ret && ext4_should_journal_data(inode)) { | |
83eba701 MW |
611 | ret = ext4_walk_page_buffers(handle, inode, |
612 | folio_buffers(folio), from, to, | |
613 | NULL, do_journal_get_write_access); | |
f19d5870 TM |
614 | } |
615 | ||
616 | if (ret) { | |
83eba701 MW |
617 | folio_unlock(folio); |
618 | folio_put(folio); | |
619 | folio = NULL; | |
f19d5870 | 620 | ext4_orphan_add(handle, inode); |
c755e251 | 621 | ext4_write_unlock_xattr(inode, &no_expand); |
f19d5870 TM |
622 | sem_held = 0; |
623 | ext4_journal_stop(handle); | |
624 | handle = NULL; | |
625 | ext4_truncate_failed_write(inode); | |
626 | /* | |
627 | * If truncate failed early the inode might | |
628 | * still be on the orphan list; we need to | |
629 | * make sure the inode is removed from the | |
630 | * orphan list in that case. | |
631 | */ | |
632 | if (inode->i_nlink) | |
633 | ext4_orphan_del(NULL, inode); | |
634 | } | |
635 | ||
636 | if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) | |
637 | goto retry; | |
638 | ||
83eba701 MW |
639 | if (folio) |
640 | block_commit_write(&folio->page, from, to); | |
f19d5870 | 641 | out: |
83eba701 MW |
642 | if (folio) { |
643 | folio_unlock(folio); | |
644 | folio_put(folio); | |
f19d5870 | 645 | } |
7fa8a8ee | 646 | out_nofolio: |
f19d5870 | 647 | if (sem_held) |
c755e251 | 648 | ext4_write_unlock_xattr(inode, &no_expand); |
f19d5870 TM |
649 | if (handle) |
650 | ext4_journal_stop(handle); | |
651 | brelse(iloc.bh); | |
652 | return ret; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Try to write data in the inode. | |
657 | * If the inode has inline data, check whether the new write can be | |
658 | * in the inode also. If not, create the page the handle, move the data | |
659 | * to the page make it update and let the later codes create extent for it. | |
660 | */ | |
661 | int ext4_try_to_write_inline_data(struct address_space *mapping, | |
662 | struct inode *inode, | |
663 | loff_t pos, unsigned len, | |
f19d5870 TM |
664 | struct page **pagep) |
665 | { | |
666 | int ret; | |
667 | handle_t *handle; | |
f8f8c89f | 668 | struct folio *folio; |
f19d5870 TM |
669 | struct ext4_iloc iloc; |
670 | ||
671 | if (pos + len > ext4_get_max_inline_size(inode)) | |
672 | goto convert; | |
673 | ||
674 | ret = ext4_get_inode_loc(inode, &iloc); | |
675 | if (ret) | |
676 | return ret; | |
677 | ||
678 | /* | |
679 | * The possible write could happen in the inode, | |
680 | * so try to reserve the space in inode first. | |
681 | */ | |
9924a92a | 682 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
f19d5870 TM |
683 | if (IS_ERR(handle)) { |
684 | ret = PTR_ERR(handle); | |
685 | handle = NULL; | |
686 | goto out; | |
687 | } | |
688 | ||
689 | ret = ext4_prepare_inline_data(handle, inode, pos + len); | |
690 | if (ret && ret != -ENOSPC) | |
691 | goto out; | |
692 | ||
693 | /* We don't have space in inline inode, so convert it to extent. */ | |
694 | if (ret == -ENOSPC) { | |
695 | ext4_journal_stop(handle); | |
696 | brelse(iloc.bh); | |
697 | goto convert; | |
698 | } | |
699 | ||
188c299e JK |
700 | ret = ext4_journal_get_write_access(handle, inode->i_sb, iloc.bh, |
701 | EXT4_JTR_NONE); | |
362eca70 TT |
702 | if (ret) |
703 | goto out; | |
704 | ||
f8f8c89f MW |
705 | folio = __filemap_get_folio(mapping, 0, FGP_WRITEBEGIN | FGP_NOFS, |
706 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
707 | if (IS_ERR(folio)) { |
708 | ret = PTR_ERR(folio); | |
f19d5870 TM |
709 | goto out; |
710 | } | |
711 | ||
f8f8c89f | 712 | *pagep = &folio->page; |
f19d5870 TM |
713 | down_read(&EXT4_I(inode)->xattr_sem); |
714 | if (!ext4_has_inline_data(inode)) { | |
715 | ret = 0; | |
f8f8c89f MW |
716 | folio_unlock(folio); |
717 | folio_put(folio); | |
f19d5870 TM |
718 | goto out_up_read; |
719 | } | |
720 | ||
f8f8c89f | 721 | if (!folio_test_uptodate(folio)) { |
6b87fbe4 | 722 | ret = ext4_read_inline_folio(inode, folio); |
132d00be | 723 | if (ret < 0) { |
f8f8c89f MW |
724 | folio_unlock(folio); |
725 | folio_put(folio); | |
f19d5870 | 726 | goto out_up_read; |
132d00be | 727 | } |
f19d5870 TM |
728 | } |
729 | ||
730 | ret = 1; | |
731 | handle = NULL; | |
732 | out_up_read: | |
733 | up_read(&EXT4_I(inode)->xattr_sem); | |
734 | out: | |
362eca70 | 735 | if (handle && (ret != 1)) |
f19d5870 TM |
736 | ext4_journal_stop(handle); |
737 | brelse(iloc.bh); | |
738 | return ret; | |
739 | convert: | |
832ee62d | 740 | return ext4_convert_inline_data_to_extent(mapping, inode); |
f19d5870 TM |
741 | } |
742 | ||
743 | int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len, | |
744 | unsigned copied, struct page *page) | |
745 | { | |
6b90d413 | 746 | struct folio *folio = page_folio(page); |
6984aef5 ZY |
747 | handle_t *handle = ext4_journal_current_handle(); |
748 | int no_expand; | |
f19d5870 TM |
749 | void *kaddr; |
750 | struct ext4_iloc iloc; | |
6984aef5 | 751 | int ret = 0, ret2; |
f19d5870 | 752 | |
6b90d413 | 753 | if (unlikely(copied < len) && !folio_test_uptodate(folio)) |
6984aef5 | 754 | copied = 0; |
f19d5870 | 755 | |
6984aef5 ZY |
756 | if (likely(copied)) { |
757 | ret = ext4_get_inode_loc(inode, &iloc); | |
758 | if (ret) { | |
6b90d413 MW |
759 | folio_unlock(folio); |
760 | folio_put(folio); | |
6984aef5 | 761 | ext4_std_error(inode->i_sb, ret); |
f19d5870 TM |
762 | goto out; |
763 | } | |
6984aef5 ZY |
764 | ext4_write_lock_xattr(inode, &no_expand); |
765 | BUG_ON(!ext4_has_inline_data(inode)); | |
f19d5870 | 766 | |
11ef08c9 TT |
767 | /* |
768 | * ei->i_inline_off may have changed since | |
769 | * ext4_write_begin() called | |
770 | * ext4_try_to_write_inline_data() | |
771 | */ | |
772 | (void) ext4_find_inline_data_nolock(inode); | |
f19d5870 | 773 | |
6b90d413 | 774 | kaddr = kmap_local_folio(folio, 0); |
6984aef5 | 775 | ext4_write_inline_data(inode, &iloc, kaddr, pos, copied); |
6b90d413 MW |
776 | kunmap_local(kaddr); |
777 | folio_mark_uptodate(folio); | |
778 | /* clear dirty flag so that writepages wouldn't work for us. */ | |
779 | folio_clear_dirty(folio); | |
f19d5870 | 780 | |
6984aef5 ZY |
781 | ext4_write_unlock_xattr(inode, &no_expand); |
782 | brelse(iloc.bh); | |
a54c4613 | 783 | |
6984aef5 | 784 | /* |
6b90d413 | 785 | * It's important to update i_size while still holding folio |
6984aef5 ZY |
786 | * lock: page writeout could otherwise come in and zero |
787 | * beyond i_size. | |
788 | */ | |
789 | ext4_update_inode_size(inode, pos + copied); | |
790 | } | |
6b90d413 MW |
791 | folio_unlock(folio); |
792 | folio_put(folio); | |
f19d5870 | 793 | |
6984aef5 | 794 | /* |
6b90d413 MW |
795 | * Don't mark the inode dirty under folio lock. First, it unnecessarily |
796 | * makes the holding time of folio lock longer. Second, it forces lock | |
797 | * ordering of folio lock and transaction start for journaling | |
6984aef5 ZY |
798 | * filesystems. |
799 | */ | |
800 | if (likely(copied)) | |
801 | mark_inode_dirty(inode); | |
f19d5870 | 802 | out: |
6984aef5 ZY |
803 | /* |
804 | * If we didn't copy as much data as expected, we need to trim back | |
805 | * size of xattr containing inline data. | |
806 | */ | |
807 | if (pos + len > inode->i_size && ext4_can_truncate(inode)) | |
808 | ext4_orphan_add(handle, inode); | |
55ce2f64 | 809 | |
6984aef5 ZY |
810 | ret2 = ext4_journal_stop(handle); |
811 | if (!ret) | |
812 | ret = ret2; | |
813 | if (pos + len > inode->i_size) { | |
814 | ext4_truncate_failed_write(inode); | |
815 | /* | |
816 | * If truncate failed early the inode might still be | |
817 | * on the orphan list; we need to make sure the inode | |
818 | * is removed from the orphan list in that case. | |
819 | */ | |
820 | if (inode->i_nlink) | |
821 | ext4_orphan_del(NULL, inode); | |
822 | } | |
823 | return ret ? ret : copied; | |
f19d5870 TM |
824 | } |
825 | ||
3fdcfb66 TM |
826 | struct buffer_head * |
827 | ext4_journalled_write_inline_data(struct inode *inode, | |
828 | unsigned len, | |
829 | struct page *page) | |
830 | { | |
c755e251 | 831 | int ret, no_expand; |
3fdcfb66 TM |
832 | void *kaddr; |
833 | struct ext4_iloc iloc; | |
834 | ||
835 | ret = ext4_get_inode_loc(inode, &iloc); | |
836 | if (ret) { | |
837 | ext4_std_error(inode->i_sb, ret); | |
838 | return NULL; | |
839 | } | |
840 | ||
c755e251 | 841 | ext4_write_lock_xattr(inode, &no_expand); |
3fdcfb66 TM |
842 | kaddr = kmap_atomic(page); |
843 | ext4_write_inline_data(inode, &iloc, kaddr, 0, len); | |
844 | kunmap_atomic(kaddr); | |
c755e251 | 845 | ext4_write_unlock_xattr(inode, &no_expand); |
3fdcfb66 TM |
846 | |
847 | return iloc.bh; | |
848 | } | |
849 | ||
9c3569b5 TM |
850 | /* |
851 | * Try to make the page cache and handle ready for the inline data case. | |
852 | * We can call this function in 2 cases: | |
853 | * 1. The inode is created and the first write exceeds inline size. We can | |
854 | * clear the inode state safely. | |
855 | * 2. The inode has inline data, then we need to read the data, make it | |
856 | * update and dirty so that ext4_da_writepages can handle it. We don't | |
3088e5a5 | 857 | * need to start the journal since the file's metadata isn't changed now. |
9c3569b5 TM |
858 | */ |
859 | static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping, | |
860 | struct inode *inode, | |
9c3569b5 TM |
861 | void **fsdata) |
862 | { | |
863 | int ret = 0, inline_size; | |
4ed9b598 | 864 | struct folio *folio; |
9c3569b5 | 865 | |
4ed9b598 MW |
866 | folio = __filemap_get_folio(mapping, 0, FGP_WRITEBEGIN, |
867 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
868 | if (IS_ERR(folio)) |
869 | return PTR_ERR(folio); | |
9c3569b5 TM |
870 | |
871 | down_read(&EXT4_I(inode)->xattr_sem); | |
872 | if (!ext4_has_inline_data(inode)) { | |
873 | ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
874 | goto out; | |
875 | } | |
876 | ||
877 | inline_size = ext4_get_inline_size(inode); | |
878 | ||
4ed9b598 | 879 | if (!folio_test_uptodate(folio)) { |
6b87fbe4 | 880 | ret = ext4_read_inline_folio(inode, folio); |
9c3569b5 TM |
881 | if (ret < 0) |
882 | goto out; | |
883 | } | |
884 | ||
4ed9b598 | 885 | ret = __block_write_begin(&folio->page, 0, inline_size, |
9c3569b5 TM |
886 | ext4_da_get_block_prep); |
887 | if (ret) { | |
50db71ab | 888 | up_read(&EXT4_I(inode)->xattr_sem); |
4ed9b598 MW |
889 | folio_unlock(folio); |
890 | folio_put(folio); | |
9c3569b5 | 891 | ext4_truncate_failed_write(inode); |
50db71ab | 892 | return ret; |
9c3569b5 TM |
893 | } |
894 | ||
4ed9b598 MW |
895 | folio_mark_dirty(folio); |
896 | folio_mark_uptodate(folio); | |
9c3569b5 TM |
897 | ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); |
898 | *fsdata = (void *)CONVERT_INLINE_DATA; | |
899 | ||
900 | out: | |
901 | up_read(&EXT4_I(inode)->xattr_sem); | |
4ed9b598 MW |
902 | if (folio) { |
903 | folio_unlock(folio); | |
904 | folio_put(folio); | |
9c3569b5 TM |
905 | } |
906 | return ret; | |
907 | } | |
908 | ||
909 | /* | |
910 | * Prepare the write for the inline data. | |
8d6ce136 | 911 | * If the data can be written into the inode, we just read |
9c3569b5 TM |
912 | * the page and make it uptodate, and start the journal. |
913 | * Otherwise read the page, makes it dirty so that it can be | |
914 | * handle in writepages(the i_disksize update is left to the | |
915 | * normal ext4_da_write_end). | |
916 | */ | |
917 | int ext4_da_write_inline_data_begin(struct address_space *mapping, | |
918 | struct inode *inode, | |
919 | loff_t pos, unsigned len, | |
9c3569b5 TM |
920 | struct page **pagep, |
921 | void **fsdata) | |
922 | { | |
09355d9d | 923 | int ret; |
9c3569b5 | 924 | handle_t *handle; |
9a9d01f0 | 925 | struct folio *folio; |
9c3569b5 | 926 | struct ext4_iloc iloc; |
625ef8a3 | 927 | int retries = 0; |
9c3569b5 TM |
928 | |
929 | ret = ext4_get_inode_loc(inode, &iloc); | |
930 | if (ret) | |
931 | return ret; | |
932 | ||
bc0ca9df | 933 | retry_journal: |
9924a92a | 934 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
9c3569b5 TM |
935 | if (IS_ERR(handle)) { |
936 | ret = PTR_ERR(handle); | |
9c3569b5 TM |
937 | goto out; |
938 | } | |
939 | ||
09355d9d RH |
940 | ret = ext4_prepare_inline_data(handle, inode, pos + len); |
941 | if (ret && ret != -ENOSPC) | |
942 | goto out_journal; | |
9c3569b5 TM |
943 | |
944 | if (ret == -ENOSPC) { | |
8bc1379b | 945 | ext4_journal_stop(handle); |
9c3569b5 TM |
946 | ret = ext4_da_convert_inline_data_to_extent(mapping, |
947 | inode, | |
9c3569b5 | 948 | fsdata); |
bc0ca9df JK |
949 | if (ret == -ENOSPC && |
950 | ext4_should_retry_alloc(inode->i_sb, &retries)) | |
951 | goto retry_journal; | |
9c3569b5 TM |
952 | goto out; |
953 | } | |
954 | ||
36d116e9 MWO |
955 | /* |
956 | * We cannot recurse into the filesystem as the transaction | |
957 | * is already started. | |
958 | */ | |
9a9d01f0 MW |
959 | folio = __filemap_get_folio(mapping, 0, FGP_WRITEBEGIN | FGP_NOFS, |
960 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
961 | if (IS_ERR(folio)) { |
962 | ret = PTR_ERR(folio); | |
52e44777 | 963 | goto out_journal; |
9c3569b5 TM |
964 | } |
965 | ||
966 | down_read(&EXT4_I(inode)->xattr_sem); | |
967 | if (!ext4_has_inline_data(inode)) { | |
968 | ret = 0; | |
969 | goto out_release_page; | |
970 | } | |
971 | ||
9a9d01f0 | 972 | if (!folio_test_uptodate(folio)) { |
6b87fbe4 | 973 | ret = ext4_read_inline_folio(inode, folio); |
9c3569b5 TM |
974 | if (ret < 0) |
975 | goto out_release_page; | |
976 | } | |
188c299e JK |
977 | ret = ext4_journal_get_write_access(handle, inode->i_sb, iloc.bh, |
978 | EXT4_JTR_NONE); | |
362eca70 TT |
979 | if (ret) |
980 | goto out_release_page; | |
9c3569b5 TM |
981 | |
982 | up_read(&EXT4_I(inode)->xattr_sem); | |
9a9d01f0 | 983 | *pagep = &folio->page; |
9c3569b5 TM |
984 | brelse(iloc.bh); |
985 | return 1; | |
986 | out_release_page: | |
987 | up_read(&EXT4_I(inode)->xattr_sem); | |
9a9d01f0 MW |
988 | folio_unlock(folio); |
989 | folio_put(folio); | |
52e44777 JK |
990 | out_journal: |
991 | ext4_journal_stop(handle); | |
9c3569b5 | 992 | out: |
9c3569b5 TM |
993 | brelse(iloc.bh); |
994 | return ret; | |
995 | } | |
996 | ||
3c47d541 TM |
997 | #ifdef INLINE_DIR_DEBUG |
998 | void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh, | |
999 | void *inline_start, int inline_size) | |
1000 | { | |
1001 | int offset; | |
1002 | unsigned short de_len; | |
1003 | struct ext4_dir_entry_2 *de = inline_start; | |
1004 | void *dlimit = inline_start + inline_size; | |
1005 | ||
1006 | trace_printk("inode %lu\n", dir->i_ino); | |
1007 | offset = 0; | |
1008 | while ((void *)de < dlimit) { | |
1009 | de_len = ext4_rec_len_from_disk(de->rec_len, inline_size); | |
80cfb71e | 1010 | trace_printk("de: off %u rlen %u name %.*s nlen %u ino %u\n", |
3c47d541 TM |
1011 | offset, de_len, de->name_len, de->name, |
1012 | de->name_len, le32_to_cpu(de->inode)); | |
1013 | if (ext4_check_dir_entry(dir, NULL, de, bh, | |
1014 | inline_start, inline_size, offset)) | |
1015 | BUG(); | |
1016 | ||
1017 | offset += de_len; | |
1018 | de = (struct ext4_dir_entry_2 *) ((char *) de + de_len); | |
1019 | } | |
1020 | } | |
1021 | #else | |
1022 | #define ext4_show_inline_dir(dir, bh, inline_start, inline_size) | |
1023 | #endif | |
1024 | ||
1025 | /* | |
1026 | * Add a new entry into a inline dir. | |
1027 | * It will return -ENOSPC if no space is available, and -EIO | |
1028 | * and -EEXIST if directory entry already exists. | |
1029 | */ | |
1030 | static int ext4_add_dirent_to_inline(handle_t *handle, | |
5b643f9c | 1031 | struct ext4_filename *fname, |
56a04915 | 1032 | struct inode *dir, |
3c47d541 TM |
1033 | struct inode *inode, |
1034 | struct ext4_iloc *iloc, | |
1035 | void *inline_start, int inline_size) | |
1036 | { | |
3c47d541 TM |
1037 | int err; |
1038 | struct ext4_dir_entry_2 *de; | |
1039 | ||
5b643f9c TT |
1040 | err = ext4_find_dest_de(dir, inode, iloc->bh, inline_start, |
1041 | inline_size, fname, &de); | |
3c47d541 TM |
1042 | if (err) |
1043 | return err; | |
1044 | ||
5d601255 | 1045 | BUFFER_TRACE(iloc->bh, "get_write_access"); |
188c299e JK |
1046 | err = ext4_journal_get_write_access(handle, dir->i_sb, iloc->bh, |
1047 | EXT4_JTR_NONE); | |
3c47d541 TM |
1048 | if (err) |
1049 | return err; | |
471fbbea | 1050 | ext4_insert_dentry(dir, inode, de, inline_size, fname); |
3c47d541 TM |
1051 | |
1052 | ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size); | |
1053 | ||
1054 | /* | |
1055 | * XXX shouldn't update any times until successful | |
1056 | * completion of syscall, but too many callers depend | |
1057 | * on this. | |
1058 | * | |
1059 | * XXX similarly, too many callers depend on | |
1060 | * ext4_new_inode() setting the times, but error | |
1061 | * recovery deletes the inode, so the worst that can | |
1062 | * happen is that the times are slightly out of date | |
1063 | * and/or different from the directory change time. | |
1064 | */ | |
eeca7ea1 | 1065 | dir->i_mtime = dir->i_ctime = current_time(dir); |
3c47d541 | 1066 | ext4_update_dx_flag(dir); |
ee73f9a5 | 1067 | inode_inc_iversion(dir); |
3c47d541 TM |
1068 | return 1; |
1069 | } | |
1070 | ||
1071 | static void *ext4_get_inline_xattr_pos(struct inode *inode, | |
1072 | struct ext4_iloc *iloc) | |
1073 | { | |
1074 | struct ext4_xattr_entry *entry; | |
1075 | struct ext4_xattr_ibody_header *header; | |
1076 | ||
1077 | BUG_ON(!EXT4_I(inode)->i_inline_off); | |
1078 | ||
1079 | header = IHDR(inode, ext4_raw_inode(iloc)); | |
1080 | entry = (struct ext4_xattr_entry *)((void *)ext4_raw_inode(iloc) + | |
1081 | EXT4_I(inode)->i_inline_off); | |
1082 | ||
1083 | return (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs); | |
1084 | } | |
1085 | ||
1086 | /* Set the final de to cover the whole block. */ | |
1087 | static void ext4_update_final_de(void *de_buf, int old_size, int new_size) | |
1088 | { | |
1089 | struct ext4_dir_entry_2 *de, *prev_de; | |
1090 | void *limit; | |
1091 | int de_len; | |
1092 | ||
c30365b9 | 1093 | de = de_buf; |
3c47d541 TM |
1094 | if (old_size) { |
1095 | limit = de_buf + old_size; | |
1096 | do { | |
1097 | prev_de = de; | |
1098 | de_len = ext4_rec_len_from_disk(de->rec_len, old_size); | |
1099 | de_buf += de_len; | |
c30365b9 | 1100 | de = de_buf; |
3c47d541 TM |
1101 | } while (de_buf < limit); |
1102 | ||
1103 | prev_de->rec_len = ext4_rec_len_to_disk(de_len + new_size - | |
1104 | old_size, new_size); | |
1105 | } else { | |
1106 | /* this is just created, so create an empty entry. */ | |
1107 | de->inode = 0; | |
1108 | de->rec_len = ext4_rec_len_to_disk(new_size, new_size); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | static int ext4_update_inline_dir(handle_t *handle, struct inode *dir, | |
1113 | struct ext4_iloc *iloc) | |
1114 | { | |
1115 | int ret; | |
1116 | int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE; | |
1117 | int new_size = get_max_inline_xattr_value_size(dir, iloc); | |
1118 | ||
471fbbea | 1119 | if (new_size - old_size <= ext4_dir_rec_len(1, NULL)) |
3c47d541 TM |
1120 | return -ENOSPC; |
1121 | ||
1122 | ret = ext4_update_inline_data(handle, dir, | |
1123 | new_size + EXT4_MIN_INLINE_DATA_SIZE); | |
1124 | if (ret) | |
1125 | return ret; | |
1126 | ||
1127 | ext4_update_final_de(ext4_get_inline_xattr_pos(dir, iloc), old_size, | |
1128 | EXT4_I(dir)->i_inline_size - | |
1129 | EXT4_MIN_INLINE_DATA_SIZE); | |
1130 | dir->i_size = EXT4_I(dir)->i_disksize = EXT4_I(dir)->i_inline_size; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static void ext4_restore_inline_data(handle_t *handle, struct inode *inode, | |
1135 | struct ext4_iloc *iloc, | |
1136 | void *buf, int inline_size) | |
1137 | { | |
897026aa RH |
1138 | int ret; |
1139 | ||
1140 | ret = ext4_create_inline_data(handle, inode, inline_size); | |
1141 | if (ret) { | |
1142 | ext4_msg(inode->i_sb, KERN_EMERG, | |
1143 | "error restoring inline_data for inode -- potential data loss! (inode %lu, error %d)", | |
1144 | inode->i_ino, ret); | |
1145 | return; | |
1146 | } | |
3c47d541 TM |
1147 | ext4_write_inline_data(inode, iloc, buf, 0, inline_size); |
1148 | ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
1149 | } | |
1150 | ||
1151 | static int ext4_finish_convert_inline_dir(handle_t *handle, | |
1152 | struct inode *inode, | |
1153 | struct buffer_head *dir_block, | |
1154 | void *buf, | |
1155 | int inline_size) | |
1156 | { | |
1157 | int err, csum_size = 0, header_size = 0; | |
1158 | struct ext4_dir_entry_2 *de; | |
3c47d541 TM |
1159 | void *target = dir_block->b_data; |
1160 | ||
1161 | /* | |
1162 | * First create "." and ".." and then copy the dir information | |
1163 | * back to the block. | |
1164 | */ | |
c30365b9 | 1165 | de = target; |
3c47d541 TM |
1166 | de = ext4_init_dot_dotdot(inode, de, |
1167 | inode->i_sb->s_blocksize, csum_size, | |
1168 | le32_to_cpu(((struct ext4_dir_entry_2 *)buf)->inode), 1); | |
1169 | header_size = (void *)de - target; | |
1170 | ||
1171 | memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE, | |
1172 | inline_size - EXT4_INLINE_DOTDOT_SIZE); | |
1173 | ||
9aa5d32b | 1174 | if (ext4_has_metadata_csum(inode->i_sb)) |
3c47d541 TM |
1175 | csum_size = sizeof(struct ext4_dir_entry_tail); |
1176 | ||
1177 | inode->i_size = inode->i_sb->s_blocksize; | |
1178 | i_size_write(inode, inode->i_sb->s_blocksize); | |
1179 | EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize; | |
1180 | ext4_update_final_de(dir_block->b_data, | |
1181 | inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size, | |
1182 | inode->i_sb->s_blocksize - csum_size); | |
1183 | ||
ddce3b94 TT |
1184 | if (csum_size) |
1185 | ext4_initialize_dirent_tail(dir_block, | |
1186 | inode->i_sb->s_blocksize); | |
3c47d541 | 1187 | set_buffer_uptodate(dir_block); |
f4ce24f5 | 1188 | unlock_buffer(dir_block); |
f036adb3 | 1189 | err = ext4_handle_dirty_dirblock(handle, inode, dir_block); |
3c47d541 | 1190 | if (err) |
b9cf625d | 1191 | return err; |
3c47d541 | 1192 | set_buffer_verified(dir_block); |
b9cf625d | 1193 | return ext4_mark_inode_dirty(handle, inode); |
3c47d541 TM |
1194 | } |
1195 | ||
1196 | static int ext4_convert_inline_data_nolock(handle_t *handle, | |
1197 | struct inode *inode, | |
1198 | struct ext4_iloc *iloc) | |
1199 | { | |
1200 | int error; | |
1201 | void *buf = NULL; | |
1202 | struct buffer_head *data_bh = NULL; | |
1203 | struct ext4_map_blocks map; | |
1204 | int inline_size; | |
1205 | ||
1206 | inline_size = ext4_get_inline_size(inode); | |
1207 | buf = kmalloc(inline_size, GFP_NOFS); | |
1208 | if (!buf) { | |
1209 | error = -ENOMEM; | |
1210 | goto out; | |
1211 | } | |
1212 | ||
1213 | error = ext4_read_inline_data(inode, buf, inline_size, iloc); | |
1214 | if (error < 0) | |
1215 | goto out; | |
1216 | ||
40b163f1 DW |
1217 | /* |
1218 | * Make sure the inline directory entries pass checks before we try to | |
1219 | * convert them, so that we avoid touching stuff that needs fsck. | |
1220 | */ | |
1221 | if (S_ISDIR(inode->i_mode)) { | |
1222 | error = ext4_check_all_de(inode, iloc->bh, | |
1223 | buf + EXT4_INLINE_DOTDOT_SIZE, | |
1224 | inline_size - EXT4_INLINE_DOTDOT_SIZE); | |
1225 | if (error) | |
1226 | goto out; | |
1227 | } | |
1228 | ||
3c47d541 TM |
1229 | error = ext4_destroy_inline_data_nolock(handle, inode); |
1230 | if (error) | |
1231 | goto out; | |
1232 | ||
1233 | map.m_lblk = 0; | |
1234 | map.m_len = 1; | |
1235 | map.m_flags = 0; | |
1236 | error = ext4_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_CREATE); | |
1237 | if (error < 0) | |
1238 | goto out_restore; | |
1239 | if (!(map.m_flags & EXT4_MAP_MAPPED)) { | |
1240 | error = -EIO; | |
1241 | goto out_restore; | |
1242 | } | |
1243 | ||
1244 | data_bh = sb_getblk(inode->i_sb, map.m_pblk); | |
1245 | if (!data_bh) { | |
860d21e2 | 1246 | error = -ENOMEM; |
3c47d541 TM |
1247 | goto out_restore; |
1248 | } | |
1249 | ||
1250 | lock_buffer(data_bh); | |
188c299e JK |
1251 | error = ext4_journal_get_create_access(handle, inode->i_sb, data_bh, |
1252 | EXT4_JTR_NONE); | |
3c47d541 TM |
1253 | if (error) { |
1254 | unlock_buffer(data_bh); | |
1255 | error = -EIO; | |
1256 | goto out_restore; | |
1257 | } | |
1258 | memset(data_bh->b_data, 0, inode->i_sb->s_blocksize); | |
1259 | ||
1260 | if (!S_ISDIR(inode->i_mode)) { | |
1261 | memcpy(data_bh->b_data, buf, inline_size); | |
1262 | set_buffer_uptodate(data_bh); | |
f4ce24f5 | 1263 | unlock_buffer(data_bh); |
3c47d541 TM |
1264 | error = ext4_handle_dirty_metadata(handle, |
1265 | inode, data_bh); | |
1266 | } else { | |
1267 | error = ext4_finish_convert_inline_dir(handle, inode, data_bh, | |
1268 | buf, inline_size); | |
1269 | } | |
1270 | ||
3c47d541 TM |
1271 | out_restore: |
1272 | if (error) | |
1273 | ext4_restore_inline_data(handle, inode, iloc, buf, inline_size); | |
1274 | ||
1275 | out: | |
1276 | brelse(data_bh); | |
1277 | kfree(buf); | |
1278 | return error; | |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * Try to add the new entry to the inline data. | |
1283 | * If succeeds, return 0. If not, extended the inline dir and copied data to | |
1284 | * the new created block. | |
1285 | */ | |
5b643f9c | 1286 | int ext4_try_add_inline_entry(handle_t *handle, struct ext4_filename *fname, |
56a04915 | 1287 | struct inode *dir, struct inode *inode) |
3c47d541 | 1288 | { |
4209ae12 | 1289 | int ret, ret2, inline_size, no_expand; |
3c47d541 TM |
1290 | void *inline_start; |
1291 | struct ext4_iloc iloc; | |
3c47d541 TM |
1292 | |
1293 | ret = ext4_get_inode_loc(dir, &iloc); | |
1294 | if (ret) | |
1295 | return ret; | |
1296 | ||
c755e251 | 1297 | ext4_write_lock_xattr(dir, &no_expand); |
3c47d541 TM |
1298 | if (!ext4_has_inline_data(dir)) |
1299 | goto out; | |
1300 | ||
1301 | inline_start = (void *)ext4_raw_inode(&iloc)->i_block + | |
1302 | EXT4_INLINE_DOTDOT_SIZE; | |
1303 | inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE; | |
1304 | ||
56a04915 | 1305 | ret = ext4_add_dirent_to_inline(handle, fname, dir, inode, &iloc, |
3c47d541 TM |
1306 | inline_start, inline_size); |
1307 | if (ret != -ENOSPC) | |
1308 | goto out; | |
1309 | ||
1310 | /* check whether it can be inserted to inline xattr space. */ | |
1311 | inline_size = EXT4_I(dir)->i_inline_size - | |
1312 | EXT4_MIN_INLINE_DATA_SIZE; | |
1313 | if (!inline_size) { | |
1314 | /* Try to use the xattr space.*/ | |
1315 | ret = ext4_update_inline_dir(handle, dir, &iloc); | |
1316 | if (ret && ret != -ENOSPC) | |
1317 | goto out; | |
1318 | ||
1319 | inline_size = EXT4_I(dir)->i_inline_size - | |
1320 | EXT4_MIN_INLINE_DATA_SIZE; | |
1321 | } | |
1322 | ||
1323 | if (inline_size) { | |
1324 | inline_start = ext4_get_inline_xattr_pos(dir, &iloc); | |
1325 | ||
56a04915 | 1326 | ret = ext4_add_dirent_to_inline(handle, fname, dir, |
5b643f9c TT |
1327 | inode, &iloc, inline_start, |
1328 | inline_size); | |
3c47d541 TM |
1329 | |
1330 | if (ret != -ENOSPC) | |
1331 | goto out; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * The inline space is filled up, so create a new block for it. | |
1336 | * As the extent tree will be created, we have to save the inline | |
1337 | * dir first. | |
1338 | */ | |
1339 | ret = ext4_convert_inline_data_nolock(handle, dir, &iloc); | |
1340 | ||
1341 | out: | |
c755e251 | 1342 | ext4_write_unlock_xattr(dir, &no_expand); |
4209ae12 HS |
1343 | ret2 = ext4_mark_inode_dirty(handle, dir); |
1344 | if (unlikely(ret2 && !ret)) | |
1345 | ret = ret2; | |
3c47d541 TM |
1346 | brelse(iloc.bh); |
1347 | return ret; | |
1348 | } | |
1349 | ||
8af0f082 TM |
1350 | /* |
1351 | * This function fills a red-black tree with information from an | |
1352 | * inlined dir. It returns the number directory entries loaded | |
1353 | * into the tree. If there is an error it is returned in err. | |
1354 | */ | |
7633b08b TT |
1355 | int ext4_inlinedir_to_tree(struct file *dir_file, |
1356 | struct inode *dir, ext4_lblk_t block, | |
1357 | struct dx_hash_info *hinfo, | |
1358 | __u32 start_hash, __u32 start_minor_hash, | |
1359 | int *has_inline_data) | |
8af0f082 TM |
1360 | { |
1361 | int err = 0, count = 0; | |
1362 | unsigned int parent_ino; | |
1363 | int pos; | |
1364 | struct ext4_dir_entry_2 *de; | |
1365 | struct inode *inode = file_inode(dir_file); | |
1366 | int ret, inline_size = 0; | |
1367 | struct ext4_iloc iloc; | |
1368 | void *dir_buf = NULL; | |
1369 | struct ext4_dir_entry_2 fake; | |
a7550b30 | 1370 | struct fscrypt_str tmp_str; |
8af0f082 TM |
1371 | |
1372 | ret = ext4_get_inode_loc(inode, &iloc); | |
1373 | if (ret) | |
1374 | return ret; | |
1375 | ||
1376 | down_read(&EXT4_I(inode)->xattr_sem); | |
1377 | if (!ext4_has_inline_data(inode)) { | |
1378 | up_read(&EXT4_I(inode)->xattr_sem); | |
1379 | *has_inline_data = 0; | |
1380 | goto out; | |
1381 | } | |
1382 | ||
1383 | inline_size = ext4_get_inline_size(inode); | |
1384 | dir_buf = kmalloc(inline_size, GFP_NOFS); | |
1385 | if (!dir_buf) { | |
1386 | ret = -ENOMEM; | |
1387 | up_read(&EXT4_I(inode)->xattr_sem); | |
1388 | goto out; | |
1389 | } | |
1390 | ||
1391 | ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc); | |
1392 | up_read(&EXT4_I(inode)->xattr_sem); | |
1393 | if (ret < 0) | |
1394 | goto out; | |
1395 | ||
1396 | pos = 0; | |
1397 | parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode); | |
1398 | while (pos < inline_size) { | |
1399 | /* | |
1400 | * As inlined dir doesn't store any information about '.' and | |
1401 | * only the inode number of '..' is stored, we have to handle | |
1402 | * them differently. | |
1403 | */ | |
1404 | if (pos == 0) { | |
1405 | fake.inode = cpu_to_le32(inode->i_ino); | |
1406 | fake.name_len = 1; | |
1407 | strcpy(fake.name, "."); | |
1408 | fake.rec_len = ext4_rec_len_to_disk( | |
471fbbea DR |
1409 | ext4_dir_rec_len(fake.name_len, NULL), |
1410 | inline_size); | |
8af0f082 TM |
1411 | ext4_set_de_type(inode->i_sb, &fake, S_IFDIR); |
1412 | de = &fake; | |
1413 | pos = EXT4_INLINE_DOTDOT_OFFSET; | |
1414 | } else if (pos == EXT4_INLINE_DOTDOT_OFFSET) { | |
1415 | fake.inode = cpu_to_le32(parent_ino); | |
1416 | fake.name_len = 2; | |
1417 | strcpy(fake.name, ".."); | |
1418 | fake.rec_len = ext4_rec_len_to_disk( | |
471fbbea DR |
1419 | ext4_dir_rec_len(fake.name_len, NULL), |
1420 | inline_size); | |
8af0f082 TM |
1421 | ext4_set_de_type(inode->i_sb, &fake, S_IFDIR); |
1422 | de = &fake; | |
1423 | pos = EXT4_INLINE_DOTDOT_SIZE; | |
1424 | } else { | |
1425 | de = (struct ext4_dir_entry_2 *)(dir_buf + pos); | |
1426 | pos += ext4_rec_len_from_disk(de->rec_len, inline_size); | |
1427 | if (ext4_check_dir_entry(inode, dir_file, de, | |
1428 | iloc.bh, dir_buf, | |
1429 | inline_size, pos)) { | |
1430 | ret = count; | |
1431 | goto out; | |
1432 | } | |
1433 | } | |
1434 | ||
471fbbea DR |
1435 | if (ext4_hash_in_dirent(dir)) { |
1436 | hinfo->hash = EXT4_DIRENT_HASH(de); | |
1437 | hinfo->minor_hash = EXT4_DIRENT_MINOR_HASH(de); | |
1438 | } else { | |
1439 | ext4fs_dirhash(dir, de->name, de->name_len, hinfo); | |
1440 | } | |
8af0f082 TM |
1441 | if ((hinfo->hash < start_hash) || |
1442 | ((hinfo->hash == start_hash) && | |
1443 | (hinfo->minor_hash < start_minor_hash))) | |
1444 | continue; | |
1445 | if (de->inode == 0) | |
1446 | continue; | |
2f61830a TT |
1447 | tmp_str.name = de->name; |
1448 | tmp_str.len = de->name_len; | |
1449 | err = ext4_htree_store_dirent(dir_file, hinfo->hash, | |
1450 | hinfo->minor_hash, de, &tmp_str); | |
8af0f082 | 1451 | if (err) { |
7a14826e | 1452 | ret = err; |
8af0f082 TM |
1453 | goto out; |
1454 | } | |
1455 | count++; | |
1456 | } | |
1457 | ret = count; | |
1458 | out: | |
1459 | kfree(dir_buf); | |
1460 | brelse(iloc.bh); | |
1461 | return ret; | |
1462 | } | |
1463 | ||
c4d8b023 TM |
1464 | /* |
1465 | * So this function is called when the volume is mkfsed with | |
1466 | * dir_index disabled. In order to keep f_pos persistent | |
1467 | * after we convert from an inlined dir to a blocked based, | |
1468 | * we just pretend that we are a normal dir and return the | |
1469 | * offset as if '.' and '..' really take place. | |
1470 | * | |
1471 | */ | |
725bebb2 AV |
1472 | int ext4_read_inline_dir(struct file *file, |
1473 | struct dir_context *ctx, | |
65d165d9 TM |
1474 | int *has_inline_data) |
1475 | { | |
65d165d9 | 1476 | unsigned int offset, parent_ino; |
725bebb2 | 1477 | int i; |
65d165d9 TM |
1478 | struct ext4_dir_entry_2 *de; |
1479 | struct super_block *sb; | |
725bebb2 | 1480 | struct inode *inode = file_inode(file); |
65d165d9 TM |
1481 | int ret, inline_size = 0; |
1482 | struct ext4_iloc iloc; | |
1483 | void *dir_buf = NULL; | |
c4d8b023 | 1484 | int dotdot_offset, dotdot_size, extra_offset, extra_size; |
65d165d9 TM |
1485 | |
1486 | ret = ext4_get_inode_loc(inode, &iloc); | |
1487 | if (ret) | |
1488 | return ret; | |
1489 | ||
1490 | down_read(&EXT4_I(inode)->xattr_sem); | |
1491 | if (!ext4_has_inline_data(inode)) { | |
1492 | up_read(&EXT4_I(inode)->xattr_sem); | |
1493 | *has_inline_data = 0; | |
1494 | goto out; | |
1495 | } | |
1496 | ||
1497 | inline_size = ext4_get_inline_size(inode); | |
1498 | dir_buf = kmalloc(inline_size, GFP_NOFS); | |
1499 | if (!dir_buf) { | |
1500 | ret = -ENOMEM; | |
1501 | up_read(&EXT4_I(inode)->xattr_sem); | |
1502 | goto out; | |
1503 | } | |
1504 | ||
1505 | ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc); | |
1506 | up_read(&EXT4_I(inode)->xattr_sem); | |
1507 | if (ret < 0) | |
1508 | goto out; | |
1509 | ||
48ffdab1 | 1510 | ret = 0; |
65d165d9 | 1511 | sb = inode->i_sb; |
65d165d9 | 1512 | parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode); |
725bebb2 | 1513 | offset = ctx->pos; |
c4d8b023 TM |
1514 | |
1515 | /* | |
1516 | * dotdot_offset and dotdot_size is the real offset and | |
1517 | * size for ".." and "." if the dir is block based while | |
1518 | * the real size for them are only EXT4_INLINE_DOTDOT_SIZE. | |
1519 | * So we will use extra_offset and extra_size to indicate them | |
1520 | * during the inline dir iteration. | |
1521 | */ | |
471fbbea DR |
1522 | dotdot_offset = ext4_dir_rec_len(1, NULL); |
1523 | dotdot_size = dotdot_offset + ext4_dir_rec_len(2, NULL); | |
c4d8b023 TM |
1524 | extra_offset = dotdot_size - EXT4_INLINE_DOTDOT_SIZE; |
1525 | extra_size = extra_offset + inline_size; | |
65d165d9 | 1526 | |
725bebb2 AV |
1527 | /* |
1528 | * If the version has changed since the last call to | |
1529 | * readdir(2), then we might be pointing to an invalid | |
1530 | * dirent right now. Scan from the start of the inline | |
1531 | * dir to make sure. | |
1532 | */ | |
c472c07b | 1533 | if (!inode_eq_iversion(inode, file->f_version)) { |
725bebb2 AV |
1534 | for (i = 0; i < extra_size && i < offset;) { |
1535 | /* | |
1536 | * "." is with offset 0 and | |
1537 | * ".." is dotdot_offset. | |
1538 | */ | |
1539 | if (!i) { | |
1540 | i = dotdot_offset; | |
1541 | continue; | |
1542 | } else if (i == dotdot_offset) { | |
1543 | i = dotdot_size; | |
c4d8b023 TM |
1544 | continue; |
1545 | } | |
725bebb2 AV |
1546 | /* for other entry, the real offset in |
1547 | * the buf has to be tuned accordingly. | |
1548 | */ | |
1549 | de = (struct ext4_dir_entry_2 *) | |
1550 | (dir_buf + i - extra_offset); | |
1551 | /* It's too expensive to do a full | |
1552 | * dirent test each time round this | |
1553 | * loop, but we do have to test at | |
1554 | * least that it is non-zero. A | |
1555 | * failure will be detected in the | |
1556 | * dirent test below. */ | |
1557 | if (ext4_rec_len_from_disk(de->rec_len, extra_size) | |
471fbbea | 1558 | < ext4_dir_rec_len(1, NULL)) |
725bebb2 AV |
1559 | break; |
1560 | i += ext4_rec_len_from_disk(de->rec_len, | |
1561 | extra_size); | |
1562 | } | |
1563 | offset = i; | |
1564 | ctx->pos = offset; | |
ee73f9a5 | 1565 | file->f_version = inode_query_iversion(inode); |
725bebb2 | 1566 | } |
65d165d9 | 1567 | |
725bebb2 AV |
1568 | while (ctx->pos < extra_size) { |
1569 | if (ctx->pos == 0) { | |
1570 | if (!dir_emit(ctx, ".", 1, inode->i_ino, DT_DIR)) | |
1571 | goto out; | |
1572 | ctx->pos = dotdot_offset; | |
1573 | continue; | |
1574 | } | |
65d165d9 | 1575 | |
725bebb2 AV |
1576 | if (ctx->pos == dotdot_offset) { |
1577 | if (!dir_emit(ctx, "..", 2, parent_ino, DT_DIR)) | |
1578 | goto out; | |
1579 | ctx->pos = dotdot_size; | |
1580 | continue; | |
1581 | } | |
65d165d9 | 1582 | |
725bebb2 AV |
1583 | de = (struct ext4_dir_entry_2 *) |
1584 | (dir_buf + ctx->pos - extra_offset); | |
1585 | if (ext4_check_dir_entry(inode, file, de, iloc.bh, dir_buf, | |
1586 | extra_size, ctx->pos)) | |
1587 | goto out; | |
1588 | if (le32_to_cpu(de->inode)) { | |
1589 | if (!dir_emit(ctx, de->name, de->name_len, | |
1590 | le32_to_cpu(de->inode), | |
1591 | get_dtype(sb, de->file_type))) | |
65d165d9 | 1592 | goto out; |
65d165d9 | 1593 | } |
725bebb2 | 1594 | ctx->pos += ext4_rec_len_from_disk(de->rec_len, extra_size); |
65d165d9 TM |
1595 | } |
1596 | out: | |
1597 | kfree(dir_buf); | |
1598 | brelse(iloc.bh); | |
1599 | return ret; | |
1600 | } | |
1601 | ||
5a57bca9 ZY |
1602 | void *ext4_read_inline_link(struct inode *inode) |
1603 | { | |
1604 | struct ext4_iloc iloc; | |
1605 | int ret, inline_size; | |
1606 | void *link; | |
1607 | ||
1608 | ret = ext4_get_inode_loc(inode, &iloc); | |
1609 | if (ret) | |
1610 | return ERR_PTR(ret); | |
1611 | ||
1612 | ret = -ENOMEM; | |
1613 | inline_size = ext4_get_inline_size(inode); | |
1614 | link = kmalloc(inline_size + 1, GFP_NOFS); | |
1615 | if (!link) | |
1616 | goto out; | |
1617 | ||
1618 | ret = ext4_read_inline_data(inode, link, inline_size, &iloc); | |
1619 | if (ret < 0) { | |
1620 | kfree(link); | |
1621 | goto out; | |
1622 | } | |
1623 | nd_terminate_link(link, inode->i_size, ret); | |
1624 | out: | |
1625 | if (ret < 0) | |
1626 | link = ERR_PTR(ret); | |
1627 | brelse(iloc.bh); | |
1628 | return link; | |
1629 | } | |
1630 | ||
32f7f22c TM |
1631 | struct buffer_head *ext4_get_first_inline_block(struct inode *inode, |
1632 | struct ext4_dir_entry_2 **parent_de, | |
1633 | int *retval) | |
1634 | { | |
1635 | struct ext4_iloc iloc; | |
1636 | ||
1637 | *retval = ext4_get_inode_loc(inode, &iloc); | |
1638 | if (*retval) | |
1639 | return NULL; | |
1640 | ||
1641 | *parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; | |
1642 | ||
1643 | return iloc.bh; | |
1644 | } | |
1645 | ||
3c47d541 TM |
1646 | /* |
1647 | * Try to create the inline data for the new dir. | |
1648 | * If it succeeds, return 0, otherwise return the error. | |
1649 | * In case of ENOSPC, the caller should create the normal disk layout dir. | |
1650 | */ | |
1651 | int ext4_try_create_inline_dir(handle_t *handle, struct inode *parent, | |
1652 | struct inode *inode) | |
1653 | { | |
1654 | int ret, inline_size = EXT4_MIN_INLINE_DATA_SIZE; | |
1655 | struct ext4_iloc iloc; | |
1656 | struct ext4_dir_entry_2 *de; | |
1657 | ||
1658 | ret = ext4_get_inode_loc(inode, &iloc); | |
1659 | if (ret) | |
1660 | return ret; | |
1661 | ||
1662 | ret = ext4_prepare_inline_data(handle, inode, inline_size); | |
1663 | if (ret) | |
1664 | goto out; | |
1665 | ||
1666 | /* | |
1667 | * For inline dir, we only save the inode information for the ".." | |
1668 | * and create a fake dentry to cover the left space. | |
1669 | */ | |
1670 | de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; | |
1671 | de->inode = cpu_to_le32(parent->i_ino); | |
1672 | de = (struct ext4_dir_entry_2 *)((void *)de + EXT4_INLINE_DOTDOT_SIZE); | |
1673 | de->inode = 0; | |
1674 | de->rec_len = ext4_rec_len_to_disk( | |
1675 | inline_size - EXT4_INLINE_DOTDOT_SIZE, | |
1676 | inline_size); | |
1677 | set_nlink(inode, 2); | |
1678 | inode->i_size = EXT4_I(inode)->i_disksize = inline_size; | |
1679 | out: | |
1680 | brelse(iloc.bh); | |
1681 | return ret; | |
1682 | } | |
1683 | ||
e8e948e7 | 1684 | struct buffer_head *ext4_find_inline_entry(struct inode *dir, |
5b643f9c | 1685 | struct ext4_filename *fname, |
e8e948e7 TM |
1686 | struct ext4_dir_entry_2 **res_dir, |
1687 | int *has_inline_data) | |
1688 | { | |
1689 | int ret; | |
1690 | struct ext4_iloc iloc; | |
1691 | void *inline_start; | |
1692 | int inline_size; | |
1693 | ||
1694 | if (ext4_get_inode_loc(dir, &iloc)) | |
1695 | return NULL; | |
1696 | ||
1697 | down_read(&EXT4_I(dir)->xattr_sem); | |
1698 | if (!ext4_has_inline_data(dir)) { | |
1699 | *has_inline_data = 0; | |
1700 | goto out; | |
1701 | } | |
1702 | ||
1703 | inline_start = (void *)ext4_raw_inode(&iloc)->i_block + | |
1704 | EXT4_INLINE_DOTDOT_SIZE; | |
1705 | inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE; | |
5b643f9c | 1706 | ret = ext4_search_dir(iloc.bh, inline_start, inline_size, |
d6b97550 | 1707 | dir, fname, 0, res_dir); |
e8e948e7 TM |
1708 | if (ret == 1) |
1709 | goto out_find; | |
1710 | if (ret < 0) | |
1711 | goto out; | |
1712 | ||
1713 | if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE) | |
1714 | goto out; | |
1715 | ||
1716 | inline_start = ext4_get_inline_xattr_pos(dir, &iloc); | |
1717 | inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE; | |
1718 | ||
5b643f9c | 1719 | ret = ext4_search_dir(iloc.bh, inline_start, inline_size, |
d6b97550 | 1720 | dir, fname, 0, res_dir); |
e8e948e7 TM |
1721 | if (ret == 1) |
1722 | goto out_find; | |
1723 | ||
1724 | out: | |
1725 | brelse(iloc.bh); | |
1726 | iloc.bh = NULL; | |
1727 | out_find: | |
1728 | up_read(&EXT4_I(dir)->xattr_sem); | |
1729 | return iloc.bh; | |
1730 | } | |
1731 | ||
9f40fe54 TM |
1732 | int ext4_delete_inline_entry(handle_t *handle, |
1733 | struct inode *dir, | |
1734 | struct ext4_dir_entry_2 *de_del, | |
1735 | struct buffer_head *bh, | |
1736 | int *has_inline_data) | |
1737 | { | |
c755e251 | 1738 | int err, inline_size, no_expand; |
9f40fe54 TM |
1739 | struct ext4_iloc iloc; |
1740 | void *inline_start; | |
1741 | ||
1742 | err = ext4_get_inode_loc(dir, &iloc); | |
1743 | if (err) | |
1744 | return err; | |
1745 | ||
c755e251 | 1746 | ext4_write_lock_xattr(dir, &no_expand); |
9f40fe54 TM |
1747 | if (!ext4_has_inline_data(dir)) { |
1748 | *has_inline_data = 0; | |
1749 | goto out; | |
1750 | } | |
1751 | ||
1752 | if ((void *)de_del - ((void *)ext4_raw_inode(&iloc)->i_block) < | |
1753 | EXT4_MIN_INLINE_DATA_SIZE) { | |
1754 | inline_start = (void *)ext4_raw_inode(&iloc)->i_block + | |
1755 | EXT4_INLINE_DOTDOT_SIZE; | |
1756 | inline_size = EXT4_MIN_INLINE_DATA_SIZE - | |
1757 | EXT4_INLINE_DOTDOT_SIZE; | |
1758 | } else { | |
1759 | inline_start = ext4_get_inline_xattr_pos(dir, &iloc); | |
1760 | inline_size = ext4_get_inline_size(dir) - | |
1761 | EXT4_MIN_INLINE_DATA_SIZE; | |
1762 | } | |
1763 | ||
5d601255 | 1764 | BUFFER_TRACE(bh, "get_write_access"); |
188c299e JK |
1765 | err = ext4_journal_get_write_access(handle, dir->i_sb, bh, |
1766 | EXT4_JTR_NONE); | |
9f40fe54 TM |
1767 | if (err) |
1768 | goto out; | |
1769 | ||
2fe34d29 | 1770 | err = ext4_generic_delete_entry(dir, de_del, bh, |
9f40fe54 TM |
1771 | inline_start, inline_size, 0); |
1772 | if (err) | |
1773 | goto out; | |
1774 | ||
9f40fe54 TM |
1775 | ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size); |
1776 | out: | |
c755e251 | 1777 | ext4_write_unlock_xattr(dir, &no_expand); |
b907f2d5 TT |
1778 | if (likely(err == 0)) |
1779 | err = ext4_mark_inode_dirty(handle, dir); | |
9f40fe54 TM |
1780 | brelse(iloc.bh); |
1781 | if (err != -ENOENT) | |
1782 | ext4_std_error(dir->i_sb, err); | |
1783 | return err; | |
1784 | } | |
1785 | ||
61f86638 TM |
1786 | /* |
1787 | * Get the inline dentry at offset. | |
1788 | */ | |
1789 | static inline struct ext4_dir_entry_2 * | |
1790 | ext4_get_inline_entry(struct inode *inode, | |
1791 | struct ext4_iloc *iloc, | |
1792 | unsigned int offset, | |
1793 | void **inline_start, | |
1794 | int *inline_size) | |
1795 | { | |
1796 | void *inline_pos; | |
1797 | ||
1798 | BUG_ON(offset > ext4_get_inline_size(inode)); | |
1799 | ||
1800 | if (offset < EXT4_MIN_INLINE_DATA_SIZE) { | |
1801 | inline_pos = (void *)ext4_raw_inode(iloc)->i_block; | |
1802 | *inline_size = EXT4_MIN_INLINE_DATA_SIZE; | |
1803 | } else { | |
1804 | inline_pos = ext4_get_inline_xattr_pos(inode, iloc); | |
1805 | offset -= EXT4_MIN_INLINE_DATA_SIZE; | |
1806 | *inline_size = ext4_get_inline_size(inode) - | |
1807 | EXT4_MIN_INLINE_DATA_SIZE; | |
1808 | } | |
1809 | ||
1810 | if (inline_start) | |
1811 | *inline_start = inline_pos; | |
1812 | return (struct ext4_dir_entry_2 *)(inline_pos + offset); | |
1813 | } | |
1814 | ||
a7550b30 | 1815 | bool empty_inline_dir(struct inode *dir, int *has_inline_data) |
61f86638 TM |
1816 | { |
1817 | int err, inline_size; | |
1818 | struct ext4_iloc iloc; | |
4d982e25 | 1819 | size_t inline_len; |
61f86638 TM |
1820 | void *inline_pos; |
1821 | unsigned int offset; | |
1822 | struct ext4_dir_entry_2 *de; | |
7aab5c84 | 1823 | bool ret = false; |
61f86638 TM |
1824 | |
1825 | err = ext4_get_inode_loc(dir, &iloc); | |
1826 | if (err) { | |
54d3adbc TT |
1827 | EXT4_ERROR_INODE_ERR(dir, -err, |
1828 | "error %d getting inode %lu block", | |
1829 | err, dir->i_ino); | |
7aab5c84 | 1830 | return false; |
61f86638 TM |
1831 | } |
1832 | ||
1833 | down_read(&EXT4_I(dir)->xattr_sem); | |
1834 | if (!ext4_has_inline_data(dir)) { | |
1835 | *has_inline_data = 0; | |
7aab5c84 | 1836 | ret = true; |
61f86638 TM |
1837 | goto out; |
1838 | } | |
1839 | ||
1840 | de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; | |
1841 | if (!le32_to_cpu(de->inode)) { | |
1842 | ext4_warning(dir->i_sb, | |
1843 | "bad inline directory (dir #%lu) - no `..'", | |
1844 | dir->i_ino); | |
61f86638 TM |
1845 | goto out; |
1846 | } | |
1847 | ||
4d982e25 | 1848 | inline_len = ext4_get_inline_size(dir); |
61f86638 | 1849 | offset = EXT4_INLINE_DOTDOT_SIZE; |
4d982e25 | 1850 | while (offset < inline_len) { |
61f86638 TM |
1851 | de = ext4_get_inline_entry(dir, &iloc, offset, |
1852 | &inline_pos, &inline_size); | |
1853 | if (ext4_check_dir_entry(dir, NULL, de, | |
1854 | iloc.bh, inline_pos, | |
1855 | inline_size, offset)) { | |
1856 | ext4_warning(dir->i_sb, | |
1857 | "bad inline directory (dir #%lu) - " | |
1858 | "inode %u, rec_len %u, name_len %d" | |
8d2ae1cb | 1859 | "inline size %d", |
61f86638 TM |
1860 | dir->i_ino, le32_to_cpu(de->inode), |
1861 | le16_to_cpu(de->rec_len), de->name_len, | |
1862 | inline_size); | |
61f86638 TM |
1863 | goto out; |
1864 | } | |
1865 | if (le32_to_cpu(de->inode)) { | |
61f86638 TM |
1866 | goto out; |
1867 | } | |
1868 | offset += ext4_rec_len_from_disk(de->rec_len, inline_size); | |
1869 | } | |
1870 | ||
7aab5c84 | 1871 | ret = true; |
61f86638 TM |
1872 | out: |
1873 | up_read(&EXT4_I(dir)->xattr_sem); | |
1874 | brelse(iloc.bh); | |
1875 | return ret; | |
1876 | } | |
1877 | ||
67cf5b09 TM |
1878 | int ext4_destroy_inline_data(handle_t *handle, struct inode *inode) |
1879 | { | |
c755e251 | 1880 | int ret, no_expand; |
67cf5b09 | 1881 | |
c755e251 | 1882 | ext4_write_lock_xattr(inode, &no_expand); |
67cf5b09 | 1883 | ret = ext4_destroy_inline_data_nolock(handle, inode); |
c755e251 | 1884 | ext4_write_unlock_xattr(inode, &no_expand); |
67cf5b09 TM |
1885 | |
1886 | return ret; | |
1887 | } | |
94191985 | 1888 | |
7046ae35 AG |
1889 | int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap) |
1890 | { | |
1891 | __u64 addr; | |
1892 | int error = -EAGAIN; | |
1893 | struct ext4_iloc iloc; | |
1894 | ||
1895 | down_read(&EXT4_I(inode)->xattr_sem); | |
1896 | if (!ext4_has_inline_data(inode)) | |
1897 | goto out; | |
1898 | ||
1899 | error = ext4_get_inode_loc(inode, &iloc); | |
1900 | if (error) | |
1901 | goto out; | |
1902 | ||
1903 | addr = (__u64)iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; | |
1904 | addr += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data; | |
1905 | addr += offsetof(struct ext4_inode, i_block); | |
1906 | ||
1907 | brelse(iloc.bh); | |
1908 | ||
1909 | iomap->addr = addr; | |
1910 | iomap->offset = 0; | |
1911 | iomap->length = min_t(loff_t, ext4_get_inline_size(inode), | |
1912 | i_size_read(inode)); | |
19319b53 CH |
1913 | iomap->type = IOMAP_INLINE; |
1914 | iomap->flags = 0; | |
7046ae35 AG |
1915 | |
1916 | out: | |
1917 | up_read(&EXT4_I(inode)->xattr_sem); | |
1918 | return error; | |
1919 | } | |
1920 | ||
01daf945 | 1921 | int ext4_inline_data_truncate(struct inode *inode, int *has_inline) |
aef1c851 TM |
1922 | { |
1923 | handle_t *handle; | |
01daf945 | 1924 | int inline_size, value_len, needed_blocks, no_expand, err = 0; |
aef1c851 TM |
1925 | size_t i_size; |
1926 | void *value = NULL; | |
1927 | struct ext4_xattr_ibody_find is = { | |
1928 | .s = { .not_found = -ENODATA, }, | |
1929 | }; | |
1930 | struct ext4_xattr_info i = { | |
1931 | .name_index = EXT4_XATTR_INDEX_SYSTEM, | |
1932 | .name = EXT4_XATTR_SYSTEM_DATA, | |
1933 | }; | |
1934 | ||
1935 | ||
1936 | needed_blocks = ext4_writepage_trans_blocks(inode); | |
9924a92a | 1937 | handle = ext4_journal_start(inode, EXT4_HT_INODE, needed_blocks); |
aef1c851 | 1938 | if (IS_ERR(handle)) |
01daf945 | 1939 | return PTR_ERR(handle); |
aef1c851 | 1940 | |
c755e251 | 1941 | ext4_write_lock_xattr(inode, &no_expand); |
aef1c851 | 1942 | if (!ext4_has_inline_data(inode)) { |
7067b261 | 1943 | ext4_write_unlock_xattr(inode, &no_expand); |
aef1c851 TM |
1944 | *has_inline = 0; |
1945 | ext4_journal_stop(handle); | |
01daf945 | 1946 | return 0; |
aef1c851 TM |
1947 | } |
1948 | ||
01daf945 | 1949 | if ((err = ext4_orphan_add(handle, inode)) != 0) |
aef1c851 TM |
1950 | goto out; |
1951 | ||
01daf945 | 1952 | if ((err = ext4_get_inode_loc(inode, &is.iloc)) != 0) |
aef1c851 TM |
1953 | goto out; |
1954 | ||
1955 | down_write(&EXT4_I(inode)->i_data_sem); | |
1956 | i_size = inode->i_size; | |
1957 | inline_size = ext4_get_inline_size(inode); | |
1958 | EXT4_I(inode)->i_disksize = i_size; | |
1959 | ||
1960 | if (i_size < inline_size) { | |
0add491d EW |
1961 | /* |
1962 | * if there's inline data to truncate and this file was | |
1963 | * converted to extents after that inline data was written, | |
1964 | * the extent status cache must be cleared to avoid leaving | |
1965 | * behind stale delayed allocated extent entries | |
1966 | */ | |
1967 | if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { | |
1968 | retry: | |
1969 | err = ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); | |
1970 | if (err == -ENOMEM) { | |
4034247a | 1971 | memalloc_retry_wait(GFP_ATOMIC); |
0add491d EW |
1972 | goto retry; |
1973 | } | |
1974 | if (err) | |
1975 | goto out_error; | |
1976 | } | |
1977 | ||
aef1c851 TM |
1978 | /* Clear the content in the xattr space. */ |
1979 | if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) { | |
01daf945 | 1980 | if ((err = ext4_xattr_ibody_find(inode, &i, &is)) != 0) |
aef1c851 TM |
1981 | goto out_error; |
1982 | ||
1983 | BUG_ON(is.s.not_found); | |
1984 | ||
1985 | value_len = le32_to_cpu(is.s.here->e_value_size); | |
1986 | value = kmalloc(value_len, GFP_NOFS); | |
01daf945 TT |
1987 | if (!value) { |
1988 | err = -ENOMEM; | |
aef1c851 | 1989 | goto out_error; |
01daf945 | 1990 | } |
aef1c851 | 1991 | |
01daf945 TT |
1992 | err = ext4_xattr_ibody_get(inode, i.name_index, |
1993 | i.name, value, value_len); | |
1994 | if (err <= 0) | |
aef1c851 TM |
1995 | goto out_error; |
1996 | ||
1997 | i.value = value; | |
1998 | i.value_len = i_size > EXT4_MIN_INLINE_DATA_SIZE ? | |
1999 | i_size - EXT4_MIN_INLINE_DATA_SIZE : 0; | |
310c097c | 2000 | err = ext4_xattr_ibody_set(handle, inode, &i, &is); |
01daf945 | 2001 | if (err) |
aef1c851 TM |
2002 | goto out_error; |
2003 | } | |
2004 | ||
2005 | /* Clear the content within i_blocks. */ | |
09c455aa TT |
2006 | if (i_size < EXT4_MIN_INLINE_DATA_SIZE) { |
2007 | void *p = (void *) ext4_raw_inode(&is.iloc)->i_block; | |
2008 | memset(p + i_size, 0, | |
2009 | EXT4_MIN_INLINE_DATA_SIZE - i_size); | |
2010 | } | |
aef1c851 TM |
2011 | |
2012 | EXT4_I(inode)->i_inline_size = i_size < | |
2013 | EXT4_MIN_INLINE_DATA_SIZE ? | |
2014 | EXT4_MIN_INLINE_DATA_SIZE : i_size; | |
2015 | } | |
2016 | ||
2017 | out_error: | |
2018 | up_write(&EXT4_I(inode)->i_data_sem); | |
2019 | out: | |
2020 | brelse(is.iloc.bh); | |
c755e251 | 2021 | ext4_write_unlock_xattr(inode, &no_expand); |
aef1c851 TM |
2022 | kfree(value); |
2023 | if (inode->i_nlink) | |
2024 | ext4_orphan_del(handle, inode); | |
2025 | ||
01daf945 TT |
2026 | if (err == 0) { |
2027 | inode->i_mtime = inode->i_ctime = current_time(inode); | |
2028 | err = ext4_mark_inode_dirty(handle, inode); | |
2029 | if (IS_SYNC(inode)) | |
2030 | ext4_handle_sync(handle); | |
2031 | } | |
aef1c851 | 2032 | ext4_journal_stop(handle); |
01daf945 | 2033 | return err; |
aef1c851 | 2034 | } |
0c8d414f TM |
2035 | |
2036 | int ext4_convert_inline_data(struct inode *inode) | |
2037 | { | |
c755e251 | 2038 | int error, needed_blocks, no_expand; |
0c8d414f TM |
2039 | handle_t *handle; |
2040 | struct ext4_iloc iloc; | |
2041 | ||
2042 | if (!ext4_has_inline_data(inode)) { | |
2043 | ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
2044 | return 0; | |
ef09ed5d YB |
2045 | } else if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { |
2046 | /* | |
2047 | * Inode has inline data but EXT4_STATE_MAY_INLINE_DATA is | |
2048 | * cleared. This means we are in the middle of moving of | |
2049 | * inline data to delay allocated block. Just force writeout | |
2050 | * here to finish conversion. | |
2051 | */ | |
2052 | error = filemap_flush(inode->i_mapping); | |
2053 | if (error) | |
2054 | return error; | |
2055 | if (!ext4_has_inline_data(inode)) | |
2056 | return 0; | |
0c8d414f TM |
2057 | } |
2058 | ||
2059 | needed_blocks = ext4_writepage_trans_blocks(inode); | |
2060 | ||
2061 | iloc.bh = NULL; | |
2062 | error = ext4_get_inode_loc(inode, &iloc); | |
2063 | if (error) | |
2064 | return error; | |
2065 | ||
9924a92a | 2066 | handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); |
0c8d414f TM |
2067 | if (IS_ERR(handle)) { |
2068 | error = PTR_ERR(handle); | |
2069 | goto out_free; | |
2070 | } | |
2071 | ||
c755e251 TT |
2072 | ext4_write_lock_xattr(inode, &no_expand); |
2073 | if (ext4_has_inline_data(inode)) | |
2074 | error = ext4_convert_inline_data_nolock(handle, inode, &iloc); | |
2075 | ext4_write_unlock_xattr(inode, &no_expand); | |
0c8d414f TM |
2076 | ext4_journal_stop(handle); |
2077 | out_free: | |
2078 | brelse(iloc.bh); | |
2079 | return error; | |
2080 | } |