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Commit | Line | Data |
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a358eea0 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c48c9f7f VK |
2 | /* |
3 | * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. | |
4 | */ | |
5 | ||
6 | #include <linux/types.h> | |
7 | #include <linux/buffer_head.h> | |
8 | #include <linux/fs.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/blkdev.h> | |
11 | #include <linux/slab.h> | |
12 | #include "exfat.h" | |
13 | ||
c48c9f7f VK |
14 | static void __set_sb_dirty(struct super_block *sb) |
15 | { | |
16 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
17 | ||
18 | sbi->s_dirt = 1; | |
19 | } | |
20 | ||
21 | static u8 name_buf[MAX_PATH_LENGTH * MAX_CHARSET_SIZE]; | |
22 | ||
c48c9f7f VK |
23 | static u8 free_bit[] = { |
24 | 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 0 ~ 19 */ | |
25 | 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, /* 20 ~ 39 */ | |
26 | 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 40 ~ 59 */ | |
27 | 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 60 ~ 79 */ | |
28 | 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, /* 80 ~ 99 */ | |
29 | 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, /* 100 ~ 119 */ | |
30 | 0, 1, 0, 2, 0, 1, 0, 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 120 ~ 139 */ | |
31 | 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, /* 140 ~ 159 */ | |
32 | 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 160 ~ 179 */ | |
33 | 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, /* 180 ~ 199 */ | |
34 | 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 200 ~ 219 */ | |
35 | 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 220 ~ 239 */ | |
36 | 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 /* 240 ~ 254 */ | |
37 | }; | |
38 | ||
39 | static u8 used_bit[] = { | |
40 | 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, /* 0 ~ 19 */ | |
41 | 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, /* 20 ~ 39 */ | |
42 | 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, /* 40 ~ 59 */ | |
43 | 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, /* 60 ~ 79 */ | |
44 | 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, /* 80 ~ 99 */ | |
45 | 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, /* 100 ~ 119 */ | |
46 | 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, /* 120 ~ 139 */ | |
47 | 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, /* 140 ~ 159 */ | |
48 | 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, /* 160 ~ 179 */ | |
49 | 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, /* 180 ~ 199 */ | |
50 | 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, /* 200 ~ 219 */ | |
51 | 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, /* 220 ~ 239 */ | |
52 | 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 /* 240 ~ 255 */ | |
53 | }; | |
54 | ||
55 | #define BITMAP_LOC(v) ((v) >> 3) | |
56 | #define BITMAP_SHIFT(v) ((v) & 0x07) | |
57 | ||
58 | static inline s32 exfat_bitmap_test(u8 *bitmap, int i) | |
59 | { | |
60 | u8 data; | |
61 | ||
62 | data = bitmap[BITMAP_LOC(i)]; | |
63 | if ((data >> BITMAP_SHIFT(i)) & 0x01) | |
64 | return 1; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static inline void exfat_bitmap_set(u8 *bitmap, int i) | |
69 | { | |
70 | bitmap[BITMAP_LOC(i)] |= (0x01 << BITMAP_SHIFT(i)); | |
71 | } | |
72 | ||
73 | static inline void exfat_bitmap_clear(u8 *bitmap, int i) | |
74 | { | |
75 | bitmap[BITMAP_LOC(i)] &= ~(0x01 << BITMAP_SHIFT(i)); | |
76 | } | |
77 | ||
78 | /* | |
79 | * File System Management Functions | |
80 | */ | |
81 | ||
82 | void fs_set_vol_flags(struct super_block *sb, u32 new_flag) | |
83 | { | |
84 | struct pbr_sector_t *p_pbr; | |
85 | struct bpbex_t *p_bpb; | |
86 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
87 | ||
88 | if (p_fs->vol_flag == new_flag) | |
89 | return; | |
90 | ||
91 | p_fs->vol_flag = new_flag; | |
92 | ||
2a17b09f VK |
93 | if (!p_fs->pbr_bh) { |
94 | if (sector_read(sb, p_fs->PBR_sector, | |
95 | &p_fs->pbr_bh, 1) != 0) | |
96 | return; | |
97 | } | |
c48c9f7f | 98 | |
2a17b09f VK |
99 | p_pbr = (struct pbr_sector_t *)p_fs->pbr_bh->b_data; |
100 | p_bpb = (struct bpbex_t *)p_pbr->bpb; | |
101 | SET16(p_bpb->vol_flags, (u16)new_flag); | |
c48c9f7f | 102 | |
2a17b09f VK |
103 | /* XXX duyoung |
104 | * what can we do here? (cuz fs_set_vol_flags() is void) | |
105 | */ | |
106 | if ((new_flag == VOL_DIRTY) && (!buffer_dirty(p_fs->pbr_bh))) | |
107 | sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 1); | |
108 | else | |
109 | sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 0); | |
c48c9f7f VK |
110 | } |
111 | ||
112 | void fs_error(struct super_block *sb) | |
113 | { | |
114 | struct exfat_mount_options *opts = &EXFAT_SB(sb)->options; | |
115 | ||
116 | if (opts->errors == EXFAT_ERRORS_PANIC) { | |
117 | panic("[EXFAT] Filesystem panic from previous error\n"); | |
118 | } else if ((opts->errors == EXFAT_ERRORS_RO) && !sb_rdonly(sb)) { | |
119 | sb->s_flags |= SB_RDONLY; | |
120 | pr_err("[EXFAT] Filesystem has been set read-only\n"); | |
121 | } | |
122 | } | |
123 | ||
124 | /* | |
125 | * Cluster Management Functions | |
126 | */ | |
127 | ||
388cd668 | 128 | static s32 clear_cluster(struct super_block *sb, u32 clu) |
c48c9f7f VK |
129 | { |
130 | sector_t s, n; | |
4b186721 | 131 | s32 ret = 0; |
c48c9f7f VK |
132 | struct buffer_head *tmp_bh = NULL; |
133 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
134 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
135 | ||
136 | if (clu == CLUSTER_32(0)) { /* FAT16 root_dir */ | |
137 | s = p_fs->root_start_sector; | |
138 | n = p_fs->data_start_sector; | |
139 | } else { | |
140 | s = START_SECTOR(clu); | |
141 | n = s + p_fs->sectors_per_clu; | |
142 | } | |
143 | ||
144 | for (; s < n; s++) { | |
145 | ret = sector_read(sb, s, &tmp_bh, 0); | |
4b186721 | 146 | if (ret != 0) |
c48c9f7f VK |
147 | return ret; |
148 | ||
149 | memset((char *)tmp_bh->b_data, 0x0, p_bd->sector_size); | |
150 | ret = sector_write(sb, s, tmp_bh, 0); | |
4b186721 | 151 | if (ret != 0) |
c48c9f7f VK |
152 | break; |
153 | } | |
154 | ||
155 | brelse(tmp_bh); | |
156 | return ret; | |
157 | } | |
158 | ||
a78b34b8 VK |
159 | static s32 set_alloc_bitmap(struct super_block *sb, u32 clu) |
160 | { | |
161 | int i, b; | |
162 | sector_t sector; | |
163 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
164 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
165 | ||
166 | i = clu >> (p_bd->sector_size_bits + 3); | |
167 | b = clu & ((p_bd->sector_size << 3) - 1); | |
168 | ||
169 | sector = START_SECTOR(p_fs->map_clu) + i; | |
170 | ||
171 | exfat_bitmap_set((u8 *)p_fs->vol_amap[i]->b_data, b); | |
172 | ||
173 | return sector_write(sb, sector, p_fs->vol_amap[i], 0); | |
174 | } | |
175 | ||
176 | static s32 clr_alloc_bitmap(struct super_block *sb, u32 clu) | |
177 | { | |
178 | int i, b; | |
179 | sector_t sector; | |
180 | #ifdef CONFIG_EXFAT_DISCARD | |
181 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
182 | struct exfat_mount_options *opts = &sbi->options; | |
183 | int ret; | |
184 | #endif /* CONFIG_EXFAT_DISCARD */ | |
185 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
186 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
187 | ||
188 | i = clu >> (p_bd->sector_size_bits + 3); | |
189 | b = clu & ((p_bd->sector_size << 3) - 1); | |
190 | ||
191 | sector = START_SECTOR(p_fs->map_clu) + i; | |
192 | ||
193 | exfat_bitmap_clear((u8 *)p_fs->vol_amap[i]->b_data, b); | |
194 | ||
a78b34b8 VK |
195 | #ifdef CONFIG_EXFAT_DISCARD |
196 | if (opts->discard) { | |
197 | ret = sb_issue_discard(sb, START_SECTOR(clu), | |
198 | (1 << p_fs->sectors_per_clu_bits), | |
199 | GFP_NOFS, 0); | |
200 | if (ret == -EOPNOTSUPP) { | |
201 | pr_warn("discard not supported by device, disabling"); | |
202 | opts->discard = 0; | |
1184fd99 AR |
203 | } else { |
204 | return ret; | |
a78b34b8 VK |
205 | } |
206 | } | |
207 | #endif /* CONFIG_EXFAT_DISCARD */ | |
1184fd99 AR |
208 | |
209 | return sector_write(sb, sector, p_fs->vol_amap[i], 0); | |
a78b34b8 VK |
210 | } |
211 | ||
212 | static u32 test_alloc_bitmap(struct super_block *sb, u32 clu) | |
213 | { | |
214 | int i, map_i, map_b; | |
215 | u32 clu_base, clu_free; | |
216 | u8 k, clu_mask; | |
217 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
218 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
219 | ||
220 | clu_base = (clu & ~(0x7)) + 2; | |
221 | clu_mask = (1 << (clu - clu_base + 2)) - 1; | |
222 | ||
223 | map_i = clu >> (p_bd->sector_size_bits + 3); | |
224 | map_b = (clu >> 3) & p_bd->sector_size_mask; | |
225 | ||
226 | for (i = 2; i < p_fs->num_clusters; i += 8) { | |
227 | k = *(((u8 *)p_fs->vol_amap[map_i]->b_data) + map_b); | |
228 | if (clu_mask > 0) { | |
229 | k |= clu_mask; | |
230 | clu_mask = 0; | |
231 | } | |
232 | if (k < 0xFF) { | |
233 | clu_free = clu_base + free_bit[k]; | |
234 | if (clu_free < p_fs->num_clusters) | |
235 | return clu_free; | |
236 | } | |
237 | clu_base += 8; | |
238 | ||
239 | if (((++map_b) >= p_bd->sector_size) || | |
240 | (clu_base >= p_fs->num_clusters)) { | |
241 | if ((++map_i) >= p_fs->map_sectors) { | |
242 | clu_base = 2; | |
243 | map_i = 0; | |
244 | } | |
245 | map_b = 0; | |
246 | } | |
247 | } | |
248 | ||
249 | return CLUSTER_32(~0); | |
250 | } | |
251 | ||
19e2bfe6 | 252 | static s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc, |
c48c9f7f VK |
253 | struct chain_t *p_chain) |
254 | { | |
255 | s32 num_clusters = 0; | |
256 | u32 hint_clu, new_clu, last_clu = CLUSTER_32(~0); | |
257 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
258 | ||
259 | hint_clu = p_chain->dir; | |
260 | if (hint_clu == CLUSTER_32(~0)) { | |
179e14c8 | 261 | hint_clu = test_alloc_bitmap(sb, p_fs->clu_srch_ptr - 2); |
c48c9f7f VK |
262 | if (hint_clu == CLUSTER_32(~0)) |
263 | return 0; | |
264 | } else if (hint_clu >= p_fs->num_clusters) { | |
265 | hint_clu = 2; | |
266 | p_chain->flags = 0x01; | |
267 | } | |
268 | ||
269 | __set_sb_dirty(sb); | |
270 | ||
271 | p_chain->dir = CLUSTER_32(~0); | |
272 | ||
179e14c8 | 273 | while ((new_clu = test_alloc_bitmap(sb, hint_clu - 2)) != CLUSTER_32(~0)) { |
c48c9f7f VK |
274 | if (new_clu != hint_clu) { |
275 | if (p_chain->flags == 0x03) { | |
276 | exfat_chain_cont_cluster(sb, p_chain->dir, | |
277 | num_clusters); | |
278 | p_chain->flags = 0x01; | |
279 | } | |
280 | } | |
281 | ||
4b186721 | 282 | if (set_alloc_bitmap(sb, new_clu - 2) != 0) |
a75500c5 | 283 | return -EIO; |
c48c9f7f VK |
284 | |
285 | num_clusters++; | |
286 | ||
287 | if (p_chain->flags == 0x01) { | |
65b88d81 | 288 | if (exfat_fat_write(sb, new_clu, CLUSTER_32(~0)) < 0) |
a75500c5 | 289 | return -EIO; |
c48c9f7f VK |
290 | } |
291 | ||
292 | if (p_chain->dir == CLUSTER_32(~0)) { | |
293 | p_chain->dir = new_clu; | |
294 | } else { | |
295 | if (p_chain->flags == 0x01) { | |
65b88d81 | 296 | if (exfat_fat_write(sb, last_clu, new_clu) < 0) |
a75500c5 | 297 | return -EIO; |
c48c9f7f VK |
298 | } |
299 | } | |
300 | last_clu = new_clu; | |
301 | ||
302 | if ((--num_alloc) == 0) { | |
303 | p_fs->clu_srch_ptr = hint_clu; | |
4e35a0d8 | 304 | if (p_fs->used_clusters != UINT_MAX) |
c48c9f7f VK |
305 | p_fs->used_clusters += num_clusters; |
306 | ||
307 | p_chain->size += num_clusters; | |
308 | return num_clusters; | |
309 | } | |
310 | ||
311 | hint_clu = new_clu + 1; | |
312 | if (hint_clu >= p_fs->num_clusters) { | |
313 | hint_clu = 2; | |
314 | ||
315 | if (p_chain->flags == 0x03) { | |
316 | exfat_chain_cont_cluster(sb, p_chain->dir, | |
317 | num_clusters); | |
318 | p_chain->flags = 0x01; | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | p_fs->clu_srch_ptr = hint_clu; | |
4e35a0d8 | 324 | if (p_fs->used_clusters != UINT_MAX) |
c48c9f7f VK |
325 | p_fs->used_clusters += num_clusters; |
326 | ||
327 | p_chain->size += num_clusters; | |
328 | return num_clusters; | |
329 | } | |
330 | ||
19e2bfe6 | 331 | static void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain, |
c48c9f7f VK |
332 | s32 do_relse) |
333 | { | |
334 | s32 num_clusters = 0; | |
335 | u32 clu; | |
336 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
337 | int i; | |
338 | sector_t sector; | |
339 | ||
340 | if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0))) | |
341 | return; | |
342 | ||
343 | if (p_chain->size <= 0) { | |
344 | pr_err("[EXFAT] free_cluster : skip free-req clu:%u, because of zero-size truncation\n", | |
345 | p_chain->dir); | |
346 | return; | |
347 | } | |
348 | ||
349 | __set_sb_dirty(sb); | |
350 | clu = p_chain->dir; | |
351 | ||
352 | if (p_chain->flags == 0x03) { | |
353 | do { | |
354 | if (do_relse) { | |
355 | sector = START_SECTOR(clu); | |
356 | for (i = 0; i < p_fs->sectors_per_clu; i++) | |
99a4b135 | 357 | exfat_buf_release(sb, sector + i); |
c48c9f7f VK |
358 | } |
359 | ||
4b186721 | 360 | if (clr_alloc_bitmap(sb, clu - 2) != 0) |
c48c9f7f VK |
361 | break; |
362 | clu++; | |
363 | ||
364 | num_clusters++; | |
365 | } while (num_clusters < p_chain->size); | |
366 | } else { | |
367 | do { | |
368 | if (p_fs->dev_ejected) | |
369 | break; | |
370 | ||
371 | if (do_relse) { | |
372 | sector = START_SECTOR(clu); | |
373 | for (i = 0; i < p_fs->sectors_per_clu; i++) | |
99a4b135 | 374 | exfat_buf_release(sb, sector + i); |
c48c9f7f VK |
375 | } |
376 | ||
4b186721 | 377 | if (clr_alloc_bitmap(sb, clu - 2) != 0) |
c48c9f7f VK |
378 | break; |
379 | ||
65b88d81 | 380 | if (exfat_fat_read(sb, clu, &clu) == -1) |
c48c9f7f VK |
381 | break; |
382 | num_clusters++; | |
383 | } while ((clu != CLUSTER_32(0)) && (clu != CLUSTER_32(~0))); | |
384 | } | |
385 | ||
4e35a0d8 | 386 | if (p_fs->used_clusters != UINT_MAX) |
c48c9f7f VK |
387 | p_fs->used_clusters -= num_clusters; |
388 | } | |
389 | ||
388cd668 | 390 | static u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain) |
c48c9f7f VK |
391 | { |
392 | u32 clu, next; | |
393 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
394 | ||
395 | clu = p_chain->dir; | |
396 | ||
397 | if (p_chain->flags == 0x03) { | |
398 | clu += p_chain->size - 1; | |
399 | } else { | |
65b88d81 | 400 | while ((exfat_fat_read(sb, clu, &next) == 0) && |
c48c9f7f VK |
401 | (next != CLUSTER_32(~0))) { |
402 | if (p_fs->dev_ejected) | |
403 | break; | |
404 | clu = next; | |
405 | } | |
406 | } | |
407 | ||
408 | return clu; | |
409 | } | |
410 | ||
411 | s32 count_num_clusters(struct super_block *sb, struct chain_t *p_chain) | |
412 | { | |
413 | int i, count = 0; | |
414 | u32 clu; | |
415 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
416 | ||
417 | if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0))) | |
418 | return 0; | |
419 | ||
420 | clu = p_chain->dir; | |
421 | ||
422 | if (p_chain->flags == 0x03) { | |
423 | count = p_chain->size; | |
424 | } else { | |
425 | for (i = 2; i < p_fs->num_clusters; i++) { | |
426 | count++; | |
65b88d81 | 427 | if (exfat_fat_read(sb, clu, &clu) != 0) |
c48c9f7f VK |
428 | return 0; |
429 | if (clu == CLUSTER_32(~0)) | |
430 | break; | |
431 | } | |
432 | } | |
433 | ||
434 | return count; | |
435 | } | |
436 | ||
19e2bfe6 | 437 | static s32 exfat_count_used_clusters(struct super_block *sb) |
c48c9f7f VK |
438 | { |
439 | int i, map_i, map_b, count = 0; | |
440 | u8 k; | |
441 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
442 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
443 | ||
d5ca94a4 RM |
444 | map_i = 0; |
445 | map_b = 0; | |
c48c9f7f VK |
446 | |
447 | for (i = 2; i < p_fs->num_clusters; i += 8) { | |
0e739ba8 | 448 | k = *(((u8 *)p_fs->vol_amap[map_i]->b_data) + map_b); |
c48c9f7f VK |
449 | count += used_bit[k]; |
450 | ||
451 | if ((++map_b) >= p_bd->sector_size) { | |
452 | map_i++; | |
453 | map_b = 0; | |
454 | } | |
455 | } | |
456 | ||
457 | return count; | |
458 | } | |
459 | ||
460 | void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len) | |
461 | { | |
462 | if (len == 0) | |
463 | return; | |
464 | ||
465 | while (len > 1) { | |
65b88d81 | 466 | if (exfat_fat_write(sb, chain, chain + 1) < 0) |
c48c9f7f VK |
467 | break; |
468 | chain++; | |
469 | len--; | |
470 | } | |
65b88d81 | 471 | exfat_fat_write(sb, chain, CLUSTER_32(~0)); |
c48c9f7f VK |
472 | } |
473 | ||
474 | /* | |
475 | * Allocation Bitmap Management Functions | |
476 | */ | |
477 | ||
478 | s32 load_alloc_bitmap(struct super_block *sb) | |
479 | { | |
480 | int i, j, ret; | |
481 | u32 map_size; | |
482 | u32 type; | |
483 | sector_t sector; | |
484 | struct chain_t clu; | |
485 | struct bmap_dentry_t *ep; | |
486 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
487 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
488 | ||
489 | clu.dir = p_fs->root_dir; | |
490 | clu.flags = 0x01; | |
491 | ||
492 | while (clu.dir != CLUSTER_32(~0)) { | |
493 | if (p_fs->dev_ejected) | |
494 | break; | |
495 | ||
496 | for (i = 0; i < p_fs->dentries_per_clu; i++) { | |
497 | ep = (struct bmap_dentry_t *)get_entry_in_dir(sb, &clu, | |
498 | i, NULL); | |
499 | if (!ep) | |
a75500c5 | 500 | return -ENOENT; |
c48c9f7f VK |
501 | |
502 | type = p_fs->fs_func->get_entry_type((struct dentry_t *)ep); | |
503 | ||
504 | if (type == TYPE_UNUSED) | |
505 | break; | |
506 | if (type != TYPE_BITMAP) | |
507 | continue; | |
508 | ||
509 | if (ep->flags == 0x0) { | |
510 | p_fs->map_clu = GET32_A(ep->start_clu); | |
0e739ba8 | 511 | map_size = (u32)GET64_A(ep->size); |
c48c9f7f | 512 | |
179e14c8 | 513 | p_fs->map_sectors = ((map_size - 1) >> p_bd->sector_size_bits) + 1; |
c48c9f7f VK |
514 | |
515 | p_fs->vol_amap = kmalloc_array(p_fs->map_sectors, | |
516 | sizeof(struct buffer_head *), | |
517 | GFP_KERNEL); | |
3b531807 | 518 | if (!p_fs->vol_amap) |
630d00b8 | 519 | return -ENOMEM; |
c48c9f7f VK |
520 | |
521 | sector = START_SECTOR(p_fs->map_clu); | |
522 | ||
523 | for (j = 0; j < p_fs->map_sectors; j++) { | |
524 | p_fs->vol_amap[j] = NULL; | |
6853f94a | 525 | ret = sector_read(sb, sector + j, &p_fs->vol_amap[j], 1); |
4b186721 | 526 | if (ret != 0) { |
c48c9f7f VK |
527 | /* release all buffers and free vol_amap */ |
528 | i = 0; | |
529 | while (i < j) | |
530 | brelse(p_fs->vol_amap[i++]); | |
531 | ||
532 | kfree(p_fs->vol_amap); | |
533 | p_fs->vol_amap = NULL; | |
534 | return ret; | |
535 | } | |
536 | } | |
537 | ||
538 | p_fs->pbr_bh = NULL; | |
4b186721 | 539 | return 0; |
c48c9f7f VK |
540 | } |
541 | } | |
542 | ||
65b88d81 | 543 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
a75500c5 | 544 | return -EIO; |
c48c9f7f VK |
545 | } |
546 | ||
133c8874 | 547 | return -EFSCORRUPTED; |
c48c9f7f VK |
548 | } |
549 | ||
550 | void free_alloc_bitmap(struct super_block *sb) | |
551 | { | |
552 | int i; | |
553 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
554 | ||
555 | brelse(p_fs->pbr_bh); | |
556 | ||
557 | for (i = 0; i < p_fs->map_sectors; i++) | |
558 | __brelse(p_fs->vol_amap[i]); | |
559 | ||
560 | kfree(p_fs->vol_amap); | |
561 | p_fs->vol_amap = NULL; | |
562 | } | |
563 | ||
c48c9f7f VK |
564 | void sync_alloc_bitmap(struct super_block *sb) |
565 | { | |
566 | int i; | |
567 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
568 | ||
3b531807 | 569 | if (!p_fs->vol_amap) |
c48c9f7f VK |
570 | return; |
571 | ||
572 | for (i = 0; i < p_fs->map_sectors; i++) | |
573 | sync_dirty_buffer(p_fs->vol_amap[i]); | |
574 | } | |
575 | ||
576 | /* | |
577 | * Upcase table Management Functions | |
578 | */ | |
579 | static s32 __load_upcase_table(struct super_block *sb, sector_t sector, | |
580 | u32 num_sectors, u32 utbl_checksum) | |
581 | { | |
0a7ef8d9 | 582 | int i, ret = -EINVAL; |
c48c9f7f VK |
583 | u32 j; |
584 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
585 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
586 | struct buffer_head *tmp_bh = NULL; | |
587 | sector_t end_sector = num_sectors + sector; | |
588 | ||
dfa5b30b | 589 | bool skip = false; |
c48c9f7f VK |
590 | u32 index = 0; |
591 | u16 uni = 0; | |
592 | u16 **upcase_table; | |
593 | ||
594 | u32 checksum = 0; | |
595 | ||
129376c6 RM |
596 | upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL); |
597 | p_fs->vol_utbl = upcase_table; | |
3b531807 | 598 | if (!upcase_table) |
630d00b8 | 599 | return -ENOMEM; |
c48c9f7f VK |
600 | memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *)); |
601 | ||
602 | while (sector < end_sector) { | |
603 | ret = sector_read(sb, sector, &tmp_bh, 1); | |
4b186721 | 604 | if (ret != 0) { |
c48c9f7f VK |
605 | pr_debug("sector read (0x%llX)fail\n", |
606 | (unsigned long long)sector); | |
607 | goto error; | |
608 | } | |
609 | sector++; | |
610 | ||
611 | for (i = 0; i < p_bd->sector_size && index <= 0xFFFF; i += 2) { | |
0e739ba8 | 612 | uni = GET16(((u8 *)tmp_bh->b_data) + i); |
c48c9f7f VK |
613 | |
614 | checksum = ((checksum & 1) ? 0x80000000 : 0) + | |
615 | (checksum >> 1) + *(((u8 *)tmp_bh->b_data) + | |
616 | i); | |
617 | checksum = ((checksum & 1) ? 0x80000000 : 0) + | |
618 | (checksum >> 1) + *(((u8 *)tmp_bh->b_data) + | |
619 | (i + 1)); | |
620 | ||
621 | if (skip) { | |
622 | pr_debug("skip from 0x%X ", index); | |
623 | index += uni; | |
624 | pr_debug("to 0x%X (amount of 0x%X)\n", | |
625 | index, uni); | |
dfa5b30b | 626 | skip = false; |
a70cfd89 | 627 | } else if (uni == index) { |
c48c9f7f | 628 | index++; |
a70cfd89 | 629 | } else if (uni == 0xFFFF) { |
dfa5b30b | 630 | skip = true; |
a70cfd89 | 631 | } else { /* uni != index , uni != 0xFFFF */ |
c48c9f7f VK |
632 | u16 col_index = get_col_index(index); |
633 | ||
3b531807 | 634 | if (!upcase_table[col_index]) { |
c48c9f7f VK |
635 | pr_debug("alloc = 0x%X\n", col_index); |
636 | upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT, | |
637 | sizeof(u16), GFP_KERNEL); | |
3b531807 | 638 | if (!upcase_table[col_index]) { |
630d00b8 | 639 | ret = -ENOMEM; |
c48c9f7f VK |
640 | goto error; |
641 | } | |
642 | ||
643 | for (j = 0; j < UTBL_ROW_COUNT; j++) | |
644 | upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j; | |
645 | } | |
646 | ||
647 | upcase_table[col_index][get_row_index(index)] = uni; | |
648 | index++; | |
649 | } | |
650 | } | |
651 | } | |
652 | if (index >= 0xFFFF && utbl_checksum == checksum) { | |
653 | if (tmp_bh) | |
654 | brelse(tmp_bh); | |
4b186721 | 655 | return 0; |
c48c9f7f | 656 | } |
0a7ef8d9 | 657 | ret = -EINVAL; |
c48c9f7f VK |
658 | error: |
659 | if (tmp_bh) | |
660 | brelse(tmp_bh); | |
661 | free_upcase_table(sb); | |
662 | return ret; | |
663 | } | |
664 | ||
665 | static s32 __load_default_upcase_table(struct super_block *sb) | |
666 | { | |
0a7ef8d9 | 667 | int i, ret = -EINVAL; |
c48c9f7f VK |
668 | u32 j; |
669 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
670 | ||
dfa5b30b | 671 | bool skip = false; |
c48c9f7f VK |
672 | u32 index = 0; |
673 | u16 uni = 0; | |
674 | u16 **upcase_table; | |
675 | ||
129376c6 RM |
676 | upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL); |
677 | p_fs->vol_utbl = upcase_table; | |
3b531807 | 678 | if (!upcase_table) |
630d00b8 | 679 | return -ENOMEM; |
c48c9f7f VK |
680 | memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *)); |
681 | ||
179e14c8 | 682 | for (i = 0; index <= 0xFFFF && i < NUM_UPCASE * 2; i += 2) { |
c48c9f7f VK |
683 | uni = GET16(uni_upcase + i); |
684 | if (skip) { | |
685 | pr_debug("skip from 0x%X ", index); | |
686 | index += uni; | |
687 | pr_debug("to 0x%X (amount of 0x%X)\n", index, uni); | |
dfa5b30b | 688 | skip = false; |
a70cfd89 | 689 | } else if (uni == index) { |
c48c9f7f | 690 | index++; |
a70cfd89 | 691 | } else if (uni == 0xFFFF) { |
dfa5b30b | 692 | skip = true; |
a70cfd89 | 693 | } else { /* uni != index , uni != 0xFFFF */ |
c48c9f7f VK |
694 | u16 col_index = get_col_index(index); |
695 | ||
3b531807 | 696 | if (!upcase_table[col_index]) { |
c48c9f7f VK |
697 | pr_debug("alloc = 0x%X\n", col_index); |
698 | upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT, | |
699 | sizeof(u16), | |
700 | GFP_KERNEL); | |
3b531807 | 701 | if (!upcase_table[col_index]) { |
630d00b8 | 702 | ret = -ENOMEM; |
c48c9f7f VK |
703 | goto error; |
704 | } | |
705 | ||
706 | for (j = 0; j < UTBL_ROW_COUNT; j++) | |
707 | upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j; | |
708 | } | |
709 | ||
710 | upcase_table[col_index][get_row_index(index)] = uni; | |
711 | index++; | |
712 | } | |
713 | } | |
714 | ||
715 | if (index >= 0xFFFF) | |
4b186721 | 716 | return 0; |
c48c9f7f VK |
717 | |
718 | error: | |
719 | /* FATAL error: default upcase table has error */ | |
720 | free_upcase_table(sb); | |
721 | return ret; | |
722 | } | |
723 | ||
724 | s32 load_upcase_table(struct super_block *sb) | |
725 | { | |
726 | int i; | |
727 | u32 tbl_clu, tbl_size; | |
728 | sector_t sector; | |
729 | u32 type, num_sectors; | |
730 | struct chain_t clu; | |
731 | struct case_dentry_t *ep; | |
732 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
733 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
734 | ||
735 | clu.dir = p_fs->root_dir; | |
736 | clu.flags = 0x01; | |
737 | ||
738 | if (p_fs->dev_ejected) | |
a75500c5 | 739 | return -EIO; |
c48c9f7f VK |
740 | |
741 | while (clu.dir != CLUSTER_32(~0)) { | |
742 | for (i = 0; i < p_fs->dentries_per_clu; i++) { | |
743 | ep = (struct case_dentry_t *)get_entry_in_dir(sb, &clu, | |
744 | i, NULL); | |
745 | if (!ep) | |
a75500c5 | 746 | return -ENOENT; |
c48c9f7f VK |
747 | |
748 | type = p_fs->fs_func->get_entry_type((struct dentry_t *)ep); | |
749 | ||
750 | if (type == TYPE_UNUSED) | |
751 | break; | |
752 | if (type != TYPE_UPCASE) | |
753 | continue; | |
754 | ||
755 | tbl_clu = GET32_A(ep->start_clu); | |
0e739ba8 | 756 | tbl_size = (u32)GET64_A(ep->size); |
c48c9f7f VK |
757 | |
758 | sector = START_SECTOR(tbl_clu); | |
179e14c8 | 759 | num_sectors = ((tbl_size - 1) >> p_bd->sector_size_bits) + 1; |
c48c9f7f | 760 | if (__load_upcase_table(sb, sector, num_sectors, |
4b186721 | 761 | GET32_A(ep->checksum)) != 0) |
c48c9f7f | 762 | break; |
4b186721 | 763 | return 0; |
c48c9f7f | 764 | } |
65b88d81 | 765 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
a75500c5 | 766 | return -EIO; |
c48c9f7f VK |
767 | } |
768 | /* load default upcase table */ | |
769 | return __load_default_upcase_table(sb); | |
770 | } | |
771 | ||
772 | void free_upcase_table(struct super_block *sb) | |
773 | { | |
774 | u32 i; | |
775 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
776 | u16 **upcase_table; | |
777 | ||
778 | upcase_table = p_fs->vol_utbl; | |
779 | for (i = 0; i < UTBL_COL_COUNT; i++) | |
780 | kfree(upcase_table[i]); | |
781 | ||
782 | kfree(p_fs->vol_utbl); | |
783 | p_fs->vol_utbl = NULL; | |
784 | } | |
785 | ||
786 | /* | |
787 | * Directory Entry Management Functions | |
788 | */ | |
789 | ||
19e2bfe6 | 790 | static u32 exfat_get_entry_type(struct dentry_t *p_entry) |
c48c9f7f | 791 | { |
0e739ba8 | 792 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; |
c48c9f7f VK |
793 | |
794 | if (ep->type == 0x0) { | |
795 | return TYPE_UNUSED; | |
796 | } else if (ep->type < 0x80) { | |
797 | return TYPE_DELETED; | |
798 | } else if (ep->type == 0x80) { | |
799 | return TYPE_INVALID; | |
800 | } else if (ep->type < 0xA0) { | |
801 | if (ep->type == 0x81) { | |
802 | return TYPE_BITMAP; | |
803 | } else if (ep->type == 0x82) { | |
804 | return TYPE_UPCASE; | |
805 | } else if (ep->type == 0x83) { | |
806 | return TYPE_VOLUME; | |
807 | } else if (ep->type == 0x85) { | |
808 | if (GET16_A(ep->attr) & ATTR_SUBDIR) | |
809 | return TYPE_DIR; | |
810 | else | |
811 | return TYPE_FILE; | |
812 | } | |
813 | return TYPE_CRITICAL_PRI; | |
814 | } else if (ep->type < 0xC0) { | |
815 | if (ep->type == 0xA0) | |
816 | return TYPE_GUID; | |
817 | else if (ep->type == 0xA1) | |
818 | return TYPE_PADDING; | |
819 | else if (ep->type == 0xA2) | |
820 | return TYPE_ACLTAB; | |
821 | return TYPE_BENIGN_PRI; | |
822 | } else if (ep->type < 0xE0) { | |
823 | if (ep->type == 0xC0) | |
824 | return TYPE_STREAM; | |
825 | else if (ep->type == 0xC1) | |
826 | return TYPE_EXTEND; | |
827 | else if (ep->type == 0xC2) | |
828 | return TYPE_ACL; | |
829 | return TYPE_CRITICAL_SEC; | |
830 | } | |
831 | ||
832 | return TYPE_BENIGN_SEC; | |
833 | } | |
834 | ||
19e2bfe6 | 835 | static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type) |
c48c9f7f | 836 | { |
0e739ba8 | 837 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; |
c48c9f7f VK |
838 | |
839 | if (type == TYPE_UNUSED) { | |
840 | ep->type = 0x0; | |
841 | } else if (type == TYPE_DELETED) { | |
842 | ep->type &= ~0x80; | |
843 | } else if (type == TYPE_STREAM) { | |
844 | ep->type = 0xC0; | |
845 | } else if (type == TYPE_EXTEND) { | |
846 | ep->type = 0xC1; | |
847 | } else if (type == TYPE_BITMAP) { | |
848 | ep->type = 0x81; | |
849 | } else if (type == TYPE_UPCASE) { | |
850 | ep->type = 0x82; | |
851 | } else if (type == TYPE_VOLUME) { | |
852 | ep->type = 0x83; | |
853 | } else if (type == TYPE_DIR) { | |
854 | ep->type = 0x85; | |
855 | SET16_A(ep->attr, ATTR_SUBDIR); | |
856 | } else if (type == TYPE_FILE) { | |
857 | ep->type = 0x85; | |
858 | SET16_A(ep->attr, ATTR_ARCHIVE); | |
859 | } else if (type == TYPE_SYMLINK) { | |
860 | ep->type = 0x85; | |
861 | SET16_A(ep->attr, ATTR_ARCHIVE | ATTR_SYMLINK); | |
862 | } | |
863 | } | |
864 | ||
19e2bfe6 | 865 | static u32 exfat_get_entry_attr(struct dentry_t *p_entry) |
c48c9f7f | 866 | { |
0e739ba8 | 867 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; |
c48c9f7f | 868 | |
0e739ba8 | 869 | return (u32)GET16_A(ep->attr); |
c48c9f7f VK |
870 | } |
871 | ||
19e2bfe6 | 872 | static void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr) |
c48c9f7f | 873 | { |
0e739ba8 | 874 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; |
c48c9f7f | 875 | |
0e739ba8 | 876 | SET16_A(ep->attr, (u16)attr); |
c48c9f7f VK |
877 | } |
878 | ||
19e2bfe6 | 879 | static u8 exfat_get_entry_flag(struct dentry_t *p_entry) |
c48c9f7f | 880 | { |
0e739ba8 | 881 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; |
c48c9f7f VK |
882 | |
883 | return ep->flags; | |
884 | } | |
885 | ||
19e2bfe6 | 886 | static void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags) |
c48c9f7f | 887 | { |
0e739ba8 | 888 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; |
c48c9f7f VK |
889 | |
890 | ep->flags = flags; | |
891 | } | |
892 | ||
19e2bfe6 | 893 | static u32 exfat_get_entry_clu0(struct dentry_t *p_entry) |
c48c9f7f | 894 | { |
0e739ba8 | 895 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; |
c48c9f7f VK |
896 | |
897 | return GET32_A(ep->start_clu); | |
898 | } | |
899 | ||
19e2bfe6 | 900 | static void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu) |
c48c9f7f VK |
901 | { |
902 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; | |
903 | ||
904 | SET32_A(ep->start_clu, start_clu); | |
905 | } | |
906 | ||
19e2bfe6 | 907 | static u64 exfat_get_entry_size(struct dentry_t *p_entry) |
c48c9f7f VK |
908 | { |
909 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; | |
910 | ||
911 | return GET64_A(ep->valid_size); | |
912 | } | |
913 | ||
19e2bfe6 | 914 | static void exfat_set_entry_size(struct dentry_t *p_entry, u64 size) |
c48c9f7f VK |
915 | { |
916 | struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry; | |
917 | ||
918 | SET64_A(ep->valid_size, size); | |
919 | SET64_A(ep->size, size); | |
920 | } | |
921 | ||
19e2bfe6 | 922 | static void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, |
c48c9f7f VK |
923 | u8 mode) |
924 | { | |
925 | u16 t = 0x00, d = 0x21; | |
926 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; | |
927 | ||
928 | switch (mode) { | |
929 | case TM_CREATE: | |
930 | t = GET16_A(ep->create_time); | |
931 | d = GET16_A(ep->create_date); | |
932 | break; | |
933 | case TM_MODIFY: | |
934 | t = GET16_A(ep->modify_time); | |
935 | d = GET16_A(ep->modify_date); | |
936 | break; | |
937 | case TM_ACCESS: | |
938 | t = GET16_A(ep->access_time); | |
939 | d = GET16_A(ep->access_date); | |
940 | break; | |
941 | } | |
942 | ||
943 | tp->sec = (t & 0x001F) << 1; | |
944 | tp->min = (t >> 5) & 0x003F; | |
945 | tp->hour = (t >> 11); | |
946 | tp->day = (d & 0x001F); | |
947 | tp->mon = (d >> 5) & 0x000F; | |
948 | tp->year = (d >> 9); | |
949 | } | |
950 | ||
19e2bfe6 | 951 | static void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, |
c48c9f7f VK |
952 | u8 mode) |
953 | { | |
954 | u16 t, d; | |
955 | struct file_dentry_t *ep = (struct file_dentry_t *)p_entry; | |
956 | ||
957 | t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1); | |
958 | d = (tp->year << 9) | (tp->mon << 5) | tp->day; | |
959 | ||
960 | switch (mode) { | |
961 | case TM_CREATE: | |
962 | SET16_A(ep->create_time, t); | |
963 | SET16_A(ep->create_date, d); | |
964 | break; | |
965 | case TM_MODIFY: | |
966 | SET16_A(ep->modify_time, t); | |
967 | SET16_A(ep->modify_date, d); | |
968 | break; | |
969 | case TM_ACCESS: | |
970 | SET16_A(ep->access_time, t); | |
971 | SET16_A(ep->access_date, d); | |
972 | break; | |
973 | } | |
974 | } | |
975 | ||
9435fa8d VK |
976 | static void init_file_entry(struct file_dentry_t *ep, u32 type) |
977 | { | |
978 | struct timestamp_t tm, *tp; | |
979 | ||
980 | exfat_set_entry_type((struct dentry_t *)ep, type); | |
981 | ||
982 | tp = tm_current(&tm); | |
983 | exfat_set_entry_time((struct dentry_t *)ep, tp, TM_CREATE); | |
984 | exfat_set_entry_time((struct dentry_t *)ep, tp, TM_MODIFY); | |
985 | exfat_set_entry_time((struct dentry_t *)ep, tp, TM_ACCESS); | |
986 | ep->create_time_ms = 0; | |
987 | ep->modify_time_ms = 0; | |
988 | ep->access_time_ms = 0; | |
989 | } | |
990 | ||
991 | static void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu, u64 size) | |
992 | { | |
993 | exfat_set_entry_type((struct dentry_t *)ep, TYPE_STREAM); | |
994 | ep->flags = flags; | |
995 | SET32_A(ep->start_clu, start_clu); | |
996 | SET64_A(ep->valid_size, size); | |
997 | SET64_A(ep->size, size); | |
998 | } | |
999 | ||
1000 | static void init_name_entry(struct name_dentry_t *ep, u16 *uniname) | |
1001 | { | |
1002 | int i; | |
1003 | ||
1004 | exfat_set_entry_type((struct dentry_t *)ep, TYPE_EXTEND); | |
1005 | ep->flags = 0x0; | |
1006 | ||
1007 | for (i = 0; i < 30; i++, i++) { | |
1008 | SET16_A(ep->unicode_0_14 + i, *uniname); | |
1009 | if (*uniname == 0x0) | |
1010 | break; | |
1011 | uniname++; | |
1012 | } | |
1013 | } | |
1014 | ||
19e2bfe6 | 1015 | static s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, |
c48c9f7f VK |
1016 | s32 entry, u32 type, u32 start_clu, u64 size) |
1017 | { | |
1018 | sector_t sector; | |
1019 | u8 flags; | |
1020 | struct file_dentry_t *file_ep; | |
1021 | struct strm_dentry_t *strm_ep; | |
1022 | ||
1023 | flags = (type == TYPE_FILE) ? 0x01 : 0x03; | |
1024 | ||
1025 | /* we cannot use get_entry_set_in_dir here because file ep is not initialized yet */ | |
1026 | file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry, | |
1027 | §or); | |
1028 | if (!file_ep) | |
a75500c5 | 1029 | return -ENOENT; |
c48c9f7f | 1030 | |
179e14c8 | 1031 | strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry + 1, |
c48c9f7f VK |
1032 | §or); |
1033 | if (!strm_ep) | |
a75500c5 | 1034 | return -ENOENT; |
c48c9f7f VK |
1035 | |
1036 | init_file_entry(file_ep, type); | |
99a4b135 | 1037 | exfat_buf_modify(sb, sector); |
c48c9f7f VK |
1038 | |
1039 | init_strm_entry(strm_ep, flags, start_clu, size); | |
99a4b135 | 1040 | exfat_buf_modify(sb, sector); |
c48c9f7f | 1041 | |
4b186721 | 1042 | return 0; |
c48c9f7f VK |
1043 | } |
1044 | ||
c48c9f7f VK |
1045 | static s32 exfat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir, |
1046 | s32 entry, s32 num_entries, | |
1047 | struct uni_name_t *p_uniname, | |
1048 | struct dos_name_t *p_dosname) | |
1049 | { | |
1050 | int i; | |
1051 | sector_t sector; | |
1052 | u16 *uniname = p_uniname->name; | |
1053 | struct file_dentry_t *file_ep; | |
1054 | struct strm_dentry_t *strm_ep; | |
1055 | struct name_dentry_t *name_ep; | |
1056 | ||
1057 | file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry, | |
1058 | §or); | |
1059 | if (!file_ep) | |
a75500c5 | 1060 | return -ENOENT; |
c48c9f7f VK |
1061 | |
1062 | file_ep->num_ext = (u8)(num_entries - 1); | |
99a4b135 | 1063 | exfat_buf_modify(sb, sector); |
c48c9f7f | 1064 | |
179e14c8 | 1065 | strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry + 1, |
c48c9f7f VK |
1066 | §or); |
1067 | if (!strm_ep) | |
a75500c5 | 1068 | return -ENOENT; |
c48c9f7f VK |
1069 | |
1070 | strm_ep->name_len = p_uniname->name_len; | |
1071 | SET16_A(strm_ep->name_hash, p_uniname->name_hash); | |
99a4b135 | 1072 | exfat_buf_modify(sb, sector); |
c48c9f7f VK |
1073 | |
1074 | for (i = 2; i < num_entries; i++) { | |
1075 | name_ep = (struct name_dentry_t *)get_entry_in_dir(sb, p_dir, | |
1076 | entry + i, | |
1077 | §or); | |
1078 | if (!name_ep) | |
a75500c5 | 1079 | return -ENOENT; |
c48c9f7f VK |
1080 | |
1081 | init_name_entry(name_ep, uniname); | |
99a4b135 | 1082 | exfat_buf_modify(sb, sector); |
c48c9f7f VK |
1083 | uniname += 15; |
1084 | } | |
1085 | ||
1086 | update_dir_checksum(sb, p_dir, entry); | |
1087 | ||
4b186721 | 1088 | return 0; |
c48c9f7f VK |
1089 | } |
1090 | ||
19e2bfe6 | 1091 | static void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir, |
8a4e640e | 1092 | s32 entry, s32 order, s32 num_entries) |
c48c9f7f VK |
1093 | { |
1094 | int i; | |
1095 | sector_t sector; | |
1096 | struct dentry_t *ep; | |
1097 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1098 | ||
1099 | for (i = order; i < num_entries; i++) { | |
179e14c8 | 1100 | ep = get_entry_in_dir(sb, p_dir, entry + i, §or); |
c48c9f7f VK |
1101 | if (!ep) |
1102 | return; | |
1103 | ||
1104 | p_fs->fs_func->set_entry_type(ep, TYPE_DELETED); | |
99a4b135 | 1105 | exfat_buf_modify(sb, sector); |
c48c9f7f VK |
1106 | } |
1107 | } | |
1108 | ||
1109 | void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir, | |
1110 | s32 entry) | |
1111 | { | |
1112 | int i, num_entries; | |
1113 | sector_t sector; | |
1114 | u16 chksum; | |
1115 | struct file_dentry_t *file_ep; | |
1116 | struct dentry_t *ep; | |
1117 | ||
1118 | file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry, | |
1119 | §or); | |
1120 | if (!file_ep) | |
1121 | return; | |
1122 | ||
99a4b135 | 1123 | exfat_buf_lock(sb, sector); |
c48c9f7f | 1124 | |
0e739ba8 | 1125 | num_entries = (s32)file_ep->num_ext + 1; |
c48c9f7f VK |
1126 | chksum = calc_checksum_2byte((void *)file_ep, DENTRY_SIZE, 0, |
1127 | CS_DIR_ENTRY); | |
1128 | ||
1129 | for (i = 1; i < num_entries; i++) { | |
179e14c8 | 1130 | ep = get_entry_in_dir(sb, p_dir, entry + i, NULL); |
c48c9f7f | 1131 | if (!ep) { |
99a4b135 | 1132 | exfat_buf_unlock(sb, sector); |
c48c9f7f VK |
1133 | return; |
1134 | } | |
1135 | ||
1136 | chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum, | |
1137 | CS_DEFAULT); | |
1138 | } | |
1139 | ||
1140 | SET16_A(file_ep->checksum, chksum); | |
99a4b135 VK |
1141 | exfat_buf_modify(sb, sector); |
1142 | exfat_buf_unlock(sb, sector); | |
c48c9f7f VK |
1143 | } |
1144 | ||
e5a490e0 VK |
1145 | static s32 __write_partial_entries_in_entry_set(struct super_block *sb, |
1146 | struct entry_set_cache_t *es, | |
1147 | sector_t sec, s32 off, u32 count) | |
1148 | { | |
1149 | s32 num_entries, buf_off = (off - es->offset); | |
1150 | u32 remaining_byte_in_sector, copy_entries; | |
1151 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1152 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
1153 | u32 clu; | |
1154 | u8 *buf, *esbuf = (u8 *)&es->__buf; | |
1155 | ||
1156 | pr_debug("%s entered es %p sec %llu off %d count %d\n", | |
1157 | __func__, es, (unsigned long long)sec, off, count); | |
1158 | num_entries = count; | |
1159 | ||
1160 | while (num_entries) { | |
1161 | /* white per sector base */ | |
1162 | remaining_byte_in_sector = (1 << p_bd->sector_size_bits) - off; | |
1163 | copy_entries = min_t(s32, | |
1164 | remaining_byte_in_sector >> DENTRY_SIZE_BITS, | |
1165 | num_entries); | |
99a4b135 | 1166 | buf = exfat_buf_getblk(sb, sec); |
e5a490e0 VK |
1167 | if (!buf) |
1168 | goto err_out; | |
1169 | pr_debug("es->buf %p buf_off %u\n", esbuf, buf_off); | |
1170 | pr_debug("copying %d entries from %p to sector %llu\n", | |
1171 | copy_entries, (esbuf + buf_off), | |
1172 | (unsigned long long)sec); | |
1173 | memcpy(buf + off, esbuf + buf_off, | |
1174 | copy_entries << DENTRY_SIZE_BITS); | |
99a4b135 | 1175 | exfat_buf_modify(sb, sec); |
e5a490e0 VK |
1176 | num_entries -= copy_entries; |
1177 | ||
1178 | if (num_entries) { | |
1179 | /* get next sector */ | |
1180 | if (IS_LAST_SECTOR_IN_CLUSTER(sec)) { | |
1181 | clu = GET_CLUSTER_FROM_SECTOR(sec); | |
1182 | if (es->alloc_flag == 0x03) { | |
1183 | clu++; | |
1184 | } else { | |
65b88d81 | 1185 | if (exfat_fat_read(sb, clu, &clu) == -1) |
e5a490e0 VK |
1186 | goto err_out; |
1187 | } | |
1188 | sec = START_SECTOR(clu); | |
1189 | } else { | |
1190 | sec++; | |
1191 | } | |
1192 | off = 0; | |
1193 | buf_off += copy_entries << DENTRY_SIZE_BITS; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | pr_debug("%s exited successfully\n", __func__); | |
1198 | return 0; | |
1199 | err_out: | |
1200 | pr_debug("%s failed\n", __func__); | |
1201 | return -EINVAL; | |
1202 | } | |
1203 | ||
1204 | /* write back all entries in entry set */ | |
1205 | static s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_t *es) | |
1206 | { | |
1207 | return __write_partial_entries_in_entry_set(sb, es, es->sector, | |
1208 | es->offset, | |
1209 | es->num_entries); | |
1210 | } | |
1211 | ||
c48c9f7f VK |
1212 | void update_dir_checksum_with_entry_set(struct super_block *sb, |
1213 | struct entry_set_cache_t *es) | |
1214 | { | |
1215 | struct dentry_t *ep; | |
1216 | u16 chksum = 0; | |
1217 | s32 chksum_type = CS_DIR_ENTRY, i; | |
1218 | ||
6853f94a | 1219 | ep = (struct dentry_t *)&es->__buf; |
c48c9f7f VK |
1220 | for (i = 0; i < es->num_entries; i++) { |
1221 | pr_debug("%s ep %p\n", __func__, ep); | |
1222 | chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum, | |
1223 | chksum_type); | |
1224 | ep++; | |
1225 | chksum_type = CS_DEFAULT; | |
1226 | } | |
1227 | ||
6853f94a | 1228 | ep = (struct dentry_t *)&es->__buf; |
c48c9f7f VK |
1229 | SET16_A(((struct file_dentry_t *)ep)->checksum, chksum); |
1230 | write_whole_entry_set(sb, es); | |
1231 | } | |
1232 | ||
1233 | static s32 _walk_fat_chain(struct super_block *sb, struct chain_t *p_dir, | |
1234 | s32 byte_offset, u32 *clu) | |
1235 | { | |
1236 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1237 | s32 clu_offset; | |
1238 | u32 cur_clu; | |
1239 | ||
1240 | clu_offset = byte_offset >> p_fs->cluster_size_bits; | |
1241 | cur_clu = p_dir->dir; | |
1242 | ||
1243 | if (p_dir->flags == 0x03) { | |
1244 | cur_clu += clu_offset; | |
1245 | } else { | |
1246 | while (clu_offset > 0) { | |
65b88d81 | 1247 | if (exfat_fat_read(sb, cur_clu, &cur_clu) == -1) |
a75500c5 | 1248 | return -EIO; |
c48c9f7f VK |
1249 | clu_offset--; |
1250 | } | |
1251 | } | |
1252 | ||
1253 | if (clu) | |
1254 | *clu = cur_clu; | |
4b186721 | 1255 | return 0; |
c48c9f7f VK |
1256 | } |
1257 | ||
388cd668 | 1258 | static s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry, |
c48c9f7f VK |
1259 | sector_t *sector, s32 *offset) |
1260 | { | |
1261 | s32 off, ret; | |
1262 | u32 clu = 0; | |
1263 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1264 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
1265 | ||
1266 | off = entry << DENTRY_SIZE_BITS; | |
1267 | ||
1268 | if (p_dir->dir == CLUSTER_32(0)) { /* FAT16 root_dir */ | |
1269 | *offset = off & p_bd->sector_size_mask; | |
1270 | *sector = off >> p_bd->sector_size_bits; | |
1271 | *sector += p_fs->root_start_sector; | |
1272 | } else { | |
1273 | ret = _walk_fat_chain(sb, p_dir, off, &clu); | |
4b186721 | 1274 | if (ret != 0) |
c48c9f7f VK |
1275 | return ret; |
1276 | ||
1277 | /* byte offset in cluster */ | |
1278 | off &= p_fs->cluster_size - 1; | |
1279 | ||
1280 | /* byte offset in sector */ | |
1281 | *offset = off & p_bd->sector_size_mask; | |
1282 | ||
1283 | /* sector offset in cluster */ | |
1284 | *sector = off >> p_bd->sector_size_bits; | |
1285 | *sector += START_SECTOR(clu); | |
1286 | } | |
4b186721 | 1287 | return 0; |
c48c9f7f VK |
1288 | } |
1289 | ||
c48c9f7f VK |
1290 | struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir, |
1291 | s32 entry, sector_t *sector) | |
1292 | { | |
1293 | s32 off; | |
1294 | sector_t sec; | |
1295 | u8 *buf; | |
1296 | ||
4b186721 | 1297 | if (find_location(sb, p_dir, entry, &sec, &off) != 0) |
c48c9f7f VK |
1298 | return NULL; |
1299 | ||
99a4b135 | 1300 | buf = exfat_buf_getblk(sb, sec); |
c48c9f7f | 1301 | |
3b531807 | 1302 | if (!buf) |
c48c9f7f VK |
1303 | return NULL; |
1304 | ||
3b531807 | 1305 | if (sector) |
c48c9f7f VK |
1306 | *sector = sec; |
1307 | return (struct dentry_t *)(buf + off); | |
1308 | } | |
1309 | ||
1310 | /* returns a set of dentries for a file or dir. | |
1311 | * Note that this is a copy (dump) of dentries so that user should call write_entry_set() | |
1312 | * to apply changes made in this entry set to the real device. | |
1313 | * in: | |
1314 | * sb+p_dir+entry: indicates a file/dir | |
1315 | * type: specifies how many dentries should be included. | |
1316 | * out: | |
1317 | * file_ep: will point the first dentry(= file dentry) on success | |
1318 | * return: | |
1319 | * pointer of entry set on success, | |
1320 | * NULL on failure. | |
1321 | */ | |
1322 | ||
1323 | #define ES_MODE_STARTED 0 | |
1324 | #define ES_MODE_GET_FILE_ENTRY 1 | |
1325 | #define ES_MODE_GET_STRM_ENTRY 2 | |
1326 | #define ES_MODE_GET_NAME_ENTRY 3 | |
1327 | #define ES_MODE_GET_CRITICAL_SEC_ENTRY 4 | |
1328 | struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb, | |
1329 | struct chain_t *p_dir, s32 entry, | |
1330 | u32 type, | |
1331 | struct dentry_t **file_ep) | |
1332 | { | |
1333 | s32 off, ret, byte_offset; | |
1334 | u32 clu = 0; | |
1335 | sector_t sec; | |
1336 | u32 entry_type; | |
1337 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1338 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
1339 | struct entry_set_cache_t *es = NULL; | |
1340 | struct dentry_t *ep, *pos; | |
1341 | u8 *buf; | |
1342 | u8 num_entries; | |
1343 | s32 mode = ES_MODE_STARTED; | |
1344 | size_t bufsize; | |
1345 | ||
1346 | pr_debug("%s entered p_dir dir %u flags %x size %d\n", | |
072429a4 | 1347 | __func__, p_dir->dir, p_dir->flags, p_dir->size); |
c48c9f7f VK |
1348 | |
1349 | byte_offset = entry << DENTRY_SIZE_BITS; | |
1350 | ret = _walk_fat_chain(sb, p_dir, byte_offset, &clu); | |
4b186721 | 1351 | if (ret != 0) |
c48c9f7f VK |
1352 | return NULL; |
1353 | ||
c48c9f7f VK |
1354 | /* byte offset in cluster */ |
1355 | byte_offset &= p_fs->cluster_size - 1; | |
1356 | ||
1357 | /* byte offset in sector */ | |
1358 | off = byte_offset & p_bd->sector_size_mask; | |
1359 | ||
1360 | /* sector offset in cluster */ | |
1361 | sec = byte_offset >> p_bd->sector_size_bits; | |
1362 | sec += START_SECTOR(clu); | |
1363 | ||
99a4b135 | 1364 | buf = exfat_buf_getblk(sb, sec); |
3b531807 | 1365 | if (!buf) |
c48c9f7f VK |
1366 | goto err_out; |
1367 | ||
c48c9f7f VK |
1368 | ep = (struct dentry_t *)(buf + off); |
1369 | entry_type = p_fs->fs_func->get_entry_type(ep); | |
1370 | ||
487242c3 | 1371 | if ((entry_type != TYPE_FILE) && (entry_type != TYPE_DIR)) |
c48c9f7f VK |
1372 | goto err_out; |
1373 | ||
1374 | if (type == ES_ALL_ENTRIES) | |
179e14c8 | 1375 | num_entries = ((struct file_dentry_t *)ep)->num_ext + 1; |
c48c9f7f VK |
1376 | else |
1377 | num_entries = type; | |
1378 | ||
1379 | bufsize = offsetof(struct entry_set_cache_t, __buf) + (num_entries) * | |
1380 | sizeof(struct dentry_t); | |
1381 | pr_debug("%s: trying to kmalloc %zx bytes for %d entries\n", __func__, | |
1382 | bufsize, num_entries); | |
1383 | es = kmalloc(bufsize, GFP_KERNEL); | |
3b531807 | 1384 | if (!es) |
c48c9f7f VK |
1385 | goto err_out; |
1386 | ||
1387 | es->num_entries = num_entries; | |
1388 | es->sector = sec; | |
1389 | es->offset = off; | |
1390 | es->alloc_flag = p_dir->flags; | |
1391 | ||
0e739ba8 | 1392 | pos = (struct dentry_t *)&es->__buf; |
c48c9f7f VK |
1393 | |
1394 | while (num_entries) { | |
1395 | /* | |
1396 | * instead of copying whole sector, we will check every entry. | |
ab050766 | 1397 | * this will provide minimum stablity and consistency. |
c48c9f7f VK |
1398 | */ |
1399 | entry_type = p_fs->fs_func->get_entry_type(ep); | |
1400 | ||
1401 | if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) | |
1402 | goto err_out; | |
1403 | ||
1404 | switch (mode) { | |
1405 | case ES_MODE_STARTED: | |
1406 | if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) | |
1407 | mode = ES_MODE_GET_FILE_ENTRY; | |
1408 | else | |
1409 | goto err_out; | |
1410 | break; | |
1411 | case ES_MODE_GET_FILE_ENTRY: | |
1412 | if (entry_type == TYPE_STREAM) | |
1413 | mode = ES_MODE_GET_STRM_ENTRY; | |
1414 | else | |
1415 | goto err_out; | |
1416 | break; | |
1417 | case ES_MODE_GET_STRM_ENTRY: | |
1418 | if (entry_type == TYPE_EXTEND) | |
1419 | mode = ES_MODE_GET_NAME_ENTRY; | |
1420 | else | |
1421 | goto err_out; | |
1422 | break; | |
1423 | case ES_MODE_GET_NAME_ENTRY: | |
1424 | if (entry_type == TYPE_EXTEND) | |
1425 | break; | |
1426 | else if (entry_type == TYPE_STREAM) | |
1427 | goto err_out; | |
1428 | else if (entry_type & TYPE_CRITICAL_SEC) | |
1429 | mode = ES_MODE_GET_CRITICAL_SEC_ENTRY; | |
1430 | else | |
1431 | goto err_out; | |
1432 | break; | |
1433 | case ES_MODE_GET_CRITICAL_SEC_ENTRY: | |
1434 | if ((entry_type == TYPE_EXTEND) || | |
1435 | (entry_type == TYPE_STREAM)) | |
1436 | goto err_out; | |
1437 | else if ((entry_type & TYPE_CRITICAL_SEC) != | |
1438 | TYPE_CRITICAL_SEC) | |
1439 | goto err_out; | |
1440 | break; | |
1441 | } | |
1442 | ||
1443 | memcpy(pos, ep, sizeof(struct dentry_t)); | |
1444 | ||
1445 | if (--num_entries == 0) | |
1446 | break; | |
1447 | ||
1448 | if (((off + DENTRY_SIZE) & p_bd->sector_size_mask) < | |
1449 | (off & p_bd->sector_size_mask)) { | |
1450 | /* get the next sector */ | |
1451 | if (IS_LAST_SECTOR_IN_CLUSTER(sec)) { | |
1452 | if (es->alloc_flag == 0x03) { | |
1453 | clu++; | |
1454 | } else { | |
65b88d81 | 1455 | if (exfat_fat_read(sb, clu, &clu) == -1) |
c48c9f7f VK |
1456 | goto err_out; |
1457 | } | |
1458 | sec = START_SECTOR(clu); | |
1459 | } else { | |
1460 | sec++; | |
1461 | } | |
99a4b135 | 1462 | buf = exfat_buf_getblk(sb, sec); |
3b531807 | 1463 | if (!buf) |
c48c9f7f VK |
1464 | goto err_out; |
1465 | off = 0; | |
1466 | ep = (struct dentry_t *)(buf); | |
1467 | } else { | |
1468 | ep++; | |
1469 | off += DENTRY_SIZE; | |
1470 | } | |
1471 | pos++; | |
1472 | } | |
1473 | ||
1474 | if (file_ep) | |
6853f94a | 1475 | *file_ep = (struct dentry_t *)&es->__buf; |
c48c9f7f VK |
1476 | |
1477 | pr_debug("%s exiting es %p sec %llu offset %d flags %d, num_entries %u buf ptr %p\n", | |
072429a4 RM |
1478 | __func__, es, (unsigned long long)es->sector, es->offset, |
1479 | es->alloc_flag, es->num_entries, &es->__buf); | |
c48c9f7f VK |
1480 | return es; |
1481 | err_out: | |
1482 | pr_debug("%s exited NULL (es %p)\n", __func__, es); | |
1483 | kfree(es); | |
1484 | return NULL; | |
1485 | } | |
1486 | ||
1487 | void release_entry_set(struct entry_set_cache_t *es) | |
1488 | { | |
1489 | pr_debug("%s es=%p\n", __func__, es); | |
1490 | kfree(es); | |
1491 | } | |
1492 | ||
c48c9f7f | 1493 | /* search EMPTY CONTINUOUS "num_entries" entries */ |
e5a490e0 | 1494 | static s32 search_deleted_or_unused_entry(struct super_block *sb, |
c48c9f7f VK |
1495 | struct chain_t *p_dir, s32 num_entries) |
1496 | { | |
1497 | int i, dentry, num_empty = 0; | |
1498 | s32 dentries_per_clu; | |
1499 | u32 type; | |
1500 | struct chain_t clu; | |
1501 | struct dentry_t *ep; | |
1502 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1503 | ||
1504 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1505 | dentries_per_clu = p_fs->dentries_in_root; | |
1506 | else | |
1507 | dentries_per_clu = p_fs->dentries_per_clu; | |
1508 | ||
1509 | if (p_fs->hint_uentry.dir == p_dir->dir) { | |
1510 | if (p_fs->hint_uentry.entry == -1) | |
1511 | return -1; | |
1512 | ||
1513 | clu.dir = p_fs->hint_uentry.clu.dir; | |
1514 | clu.size = p_fs->hint_uentry.clu.size; | |
1515 | clu.flags = p_fs->hint_uentry.clu.flags; | |
1516 | ||
1517 | dentry = p_fs->hint_uentry.entry; | |
1518 | } else { | |
1519 | p_fs->hint_uentry.entry = -1; | |
1520 | ||
1521 | clu.dir = p_dir->dir; | |
1522 | clu.size = p_dir->size; | |
1523 | clu.flags = p_dir->flags; | |
1524 | ||
1525 | dentry = 0; | |
1526 | } | |
1527 | ||
1528 | while (clu.dir != CLUSTER_32(~0)) { | |
1529 | if (p_fs->dev_ejected) | |
1530 | break; | |
1531 | ||
1532 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1533 | i = dentry % dentries_per_clu; | |
1534 | else | |
179e14c8 | 1535 | i = dentry & (dentries_per_clu - 1); |
c48c9f7f VK |
1536 | |
1537 | for (; i < dentries_per_clu; i++, dentry++) { | |
1538 | ep = get_entry_in_dir(sb, &clu, i, NULL); | |
1539 | if (!ep) | |
1540 | return -1; | |
1541 | ||
1542 | type = p_fs->fs_func->get_entry_type(ep); | |
1543 | ||
1544 | if (type == TYPE_UNUSED) { | |
1545 | num_empty++; | |
1546 | if (p_fs->hint_uentry.entry == -1) { | |
1547 | p_fs->hint_uentry.dir = p_dir->dir; | |
1548 | p_fs->hint_uentry.entry = dentry; | |
1549 | ||
1550 | p_fs->hint_uentry.clu.dir = clu.dir; | |
1551 | p_fs->hint_uentry.clu.size = clu.size; | |
1552 | p_fs->hint_uentry.clu.flags = clu.flags; | |
1553 | } | |
1554 | } else if (type == TYPE_DELETED) { | |
1555 | num_empty++; | |
1556 | } else { | |
1557 | num_empty = 0; | |
1558 | } | |
1559 | ||
1560 | if (num_empty >= num_entries) { | |
1561 | p_fs->hint_uentry.dir = CLUSTER_32(~0); | |
1562 | p_fs->hint_uentry.entry = -1; | |
1563 | ||
1564 | if (p_fs->vol_type == EXFAT) | |
179e14c8 | 1565 | return dentry - (num_entries - 1); |
c48c9f7f VK |
1566 | else |
1567 | return dentry; | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | if (p_dir->dir == CLUSTER_32(0)) | |
1572 | break; /* FAT16 root_dir */ | |
1573 | ||
1574 | if (clu.flags == 0x03) { | |
1575 | if ((--clu.size) > 0) | |
1576 | clu.dir++; | |
1577 | else | |
1578 | clu.dir = CLUSTER_32(~0); | |
1579 | } else { | |
65b88d81 | 1580 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
c48c9f7f VK |
1581 | return -1; |
1582 | } | |
1583 | } | |
1584 | ||
1585 | return -1; | |
1586 | } | |
1587 | ||
388cd668 | 1588 | static s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_entries) |
c48c9f7f VK |
1589 | { |
1590 | s32 ret, dentry; | |
1591 | u32 last_clu; | |
1592 | sector_t sector; | |
1593 | u64 size = 0; | |
1594 | struct chain_t clu; | |
1595 | struct dentry_t *ep = NULL; | |
1596 | struct super_block *sb = inode->i_sb; | |
1597 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1598 | struct file_id_t *fid = &(EXFAT_I(inode)->fid); | |
1599 | ||
1600 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1601 | return search_deleted_or_unused_entry(sb, p_dir, num_entries); | |
1602 | ||
1603 | while ((dentry = search_deleted_or_unused_entry(sb, p_dir, num_entries)) < 0) { | |
1604 | if (p_fs->dev_ejected) | |
1605 | break; | |
1606 | ||
2a17b09f VK |
1607 | if (p_dir->dir != p_fs->root_dir) |
1608 | size = i_size_read(inode); | |
c48c9f7f VK |
1609 | |
1610 | last_clu = find_last_cluster(sb, p_dir); | |
1611 | clu.dir = last_clu + 1; | |
1612 | clu.size = 0; | |
1613 | clu.flags = p_dir->flags; | |
1614 | ||
1615 | /* (1) allocate a cluster */ | |
1616 | ret = p_fs->fs_func->alloc_cluster(sb, 1, &clu); | |
1617 | if (ret < 1) | |
a75500c5 | 1618 | return -EIO; |
c48c9f7f | 1619 | |
4b186721 | 1620 | if (clear_cluster(sb, clu.dir) != 0) |
a75500c5 | 1621 | return -EIO; |
c48c9f7f VK |
1622 | |
1623 | /* (2) append to the FAT chain */ | |
1624 | if (clu.flags != p_dir->flags) { | |
1625 | exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size); | |
1626 | p_dir->flags = 0x01; | |
1627 | p_fs->hint_uentry.clu.flags = 0x01; | |
1628 | } | |
1629 | if (clu.flags == 0x01) | |
65b88d81 | 1630 | if (exfat_fat_write(sb, last_clu, clu.dir) < 0) |
a75500c5 | 1631 | return -EIO; |
c48c9f7f VK |
1632 | |
1633 | if (p_fs->hint_uentry.entry == -1) { | |
1634 | p_fs->hint_uentry.dir = p_dir->dir; | |
1635 | p_fs->hint_uentry.entry = p_dir->size << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS); | |
1636 | ||
1637 | p_fs->hint_uentry.clu.dir = clu.dir; | |
1638 | p_fs->hint_uentry.clu.size = 0; | |
1639 | p_fs->hint_uentry.clu.flags = clu.flags; | |
1640 | } | |
1641 | p_fs->hint_uentry.clu.size++; | |
1642 | p_dir->size++; | |
1643 | ||
1644 | /* (3) update the directory entry */ | |
2a17b09f VK |
1645 | if (p_dir->dir != p_fs->root_dir) { |
1646 | size += p_fs->cluster_size; | |
1647 | ||
1648 | ep = get_entry_in_dir(sb, &fid->dir, | |
1649 | fid->entry + 1, §or); | |
1650 | if (!ep) | |
1651 | return -ENOENT; | |
1652 | p_fs->fs_func->set_entry_size(ep, size); | |
1653 | p_fs->fs_func->set_entry_flag(ep, p_dir->flags); | |
99a4b135 | 1654 | exfat_buf_modify(sb, sector); |
2a17b09f VK |
1655 | |
1656 | update_dir_checksum(sb, &fid->dir, | |
1657 | fid->entry); | |
c48c9f7f VK |
1658 | } |
1659 | ||
179e14c8 | 1660 | i_size_write(inode, i_size_read(inode) + p_fs->cluster_size); |
c48c9f7f VK |
1661 | EXFAT_I(inode)->mmu_private += p_fs->cluster_size; |
1662 | EXFAT_I(inode)->fid.size += p_fs->cluster_size; | |
1663 | EXFAT_I(inode)->fid.flags = p_dir->flags; | |
1664 | inode->i_blocks += 1 << (p_fs->cluster_size_bits - 9); | |
1665 | } | |
1666 | ||
1667 | return dentry; | |
1668 | } | |
1669 | ||
e5a490e0 VK |
1670 | static s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname, |
1671 | s32 order) | |
1672 | { | |
1673 | int i, len = 0; | |
1674 | ||
1675 | for (i = 0; i < 30; i += 2) { | |
1676 | *uniname = GET16_A(ep->unicode_0_14 + i); | |
1677 | if (*uniname == 0x0) | |
1678 | return len; | |
1679 | uniname++; | |
1680 | len++; | |
1681 | } | |
1682 | ||
1683 | *uniname = 0x0; | |
1684 | return len; | |
1685 | } | |
1686 | ||
c48c9f7f VK |
1687 | /* return values of exfat_find_dir_entry() |
1688 | * >= 0 : return dir entiry position with the name in dir | |
1689 | * -1 : (root dir, ".") it is the root dir itself | |
1690 | * -2 : entry with the name does not exist | |
1691 | */ | |
19e2bfe6 | 1692 | static s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir, |
c48c9f7f VK |
1693 | struct uni_name_t *p_uniname, s32 num_entries, |
1694 | struct dos_name_t *p_dosname, u32 type) | |
1695 | { | |
1696 | int i = 0, dentry = 0, num_ext_entries = 0, len, step; | |
dfa5b30b VV |
1697 | s32 order = 0; |
1698 | bool is_feasible_entry = false; | |
c48c9f7f VK |
1699 | s32 dentries_per_clu, num_empty = 0; |
1700 | u32 entry_type; | |
1701 | u16 entry_uniname[16], *uniname = NULL, unichar; | |
1702 | struct chain_t clu; | |
1703 | struct dentry_t *ep; | |
1704 | struct file_dentry_t *file_ep; | |
1705 | struct strm_dentry_t *strm_ep; | |
1706 | struct name_dentry_t *name_ep; | |
1707 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1708 | ||
1709 | if (p_dir->dir == p_fs->root_dir) { | |
1710 | if ((!nls_uniname_cmp(sb, p_uniname->name, | |
1711 | (u16 *)UNI_CUR_DIR_NAME)) || | |
1712 | (!nls_uniname_cmp(sb, p_uniname->name, | |
1713 | (u16 *)UNI_PAR_DIR_NAME))) | |
1714 | return -1; // special case, root directory itself | |
1715 | } | |
1716 | ||
1717 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1718 | dentries_per_clu = p_fs->dentries_in_root; | |
1719 | else | |
1720 | dentries_per_clu = p_fs->dentries_per_clu; | |
1721 | ||
1722 | clu.dir = p_dir->dir; | |
1723 | clu.size = p_dir->size; | |
1724 | clu.flags = p_dir->flags; | |
1725 | ||
1726 | p_fs->hint_uentry.dir = p_dir->dir; | |
1727 | p_fs->hint_uentry.entry = -1; | |
1728 | ||
1729 | while (clu.dir != CLUSTER_32(~0)) { | |
1730 | if (p_fs->dev_ejected) | |
1731 | break; | |
1732 | ||
1733 | while (i < dentries_per_clu) { | |
1734 | ep = get_entry_in_dir(sb, &clu, i, NULL); | |
1735 | if (!ep) | |
1736 | return -2; | |
1737 | ||
1738 | entry_type = p_fs->fs_func->get_entry_type(ep); | |
1739 | step = 1; | |
1740 | ||
1741 | if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) { | |
dfa5b30b | 1742 | is_feasible_entry = false; |
c48c9f7f VK |
1743 | |
1744 | if (p_fs->hint_uentry.entry == -1) { | |
1745 | num_empty++; | |
1746 | ||
1747 | if (num_empty == 1) { | |
1748 | p_fs->hint_uentry.clu.dir = clu.dir; | |
1749 | p_fs->hint_uentry.clu.size = clu.size; | |
1750 | p_fs->hint_uentry.clu.flags = clu.flags; | |
1751 | } | |
1752 | if ((num_empty >= num_entries) || (entry_type == TYPE_UNUSED)) | |
179e14c8 | 1753 | p_fs->hint_uentry.entry = dentry - (num_empty - 1); |
c48c9f7f VK |
1754 | } |
1755 | ||
1756 | if (entry_type == TYPE_UNUSED) | |
1757 | return -2; | |
1758 | } else { | |
1759 | num_empty = 0; | |
1760 | ||
1761 | if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) { | |
0e739ba8 | 1762 | file_ep = (struct file_dentry_t *)ep; |
c48c9f7f VK |
1763 | if ((type == TYPE_ALL) || (type == entry_type)) { |
1764 | num_ext_entries = file_ep->num_ext; | |
dfa5b30b | 1765 | is_feasible_entry = true; |
c48c9f7f | 1766 | } else { |
dfa5b30b | 1767 | is_feasible_entry = false; |
c48c9f7f VK |
1768 | step = file_ep->num_ext + 1; |
1769 | } | |
1770 | } else if (entry_type == TYPE_STREAM) { | |
1771 | if (is_feasible_entry) { | |
1772 | strm_ep = (struct strm_dentry_t *)ep; | |
1773 | if (p_uniname->name_hash == GET16_A(strm_ep->name_hash) && | |
1774 | p_uniname->name_len == strm_ep->name_len) { | |
1775 | order = 1; | |
1776 | } else { | |
dfa5b30b | 1777 | is_feasible_entry = false; |
c48c9f7f VK |
1778 | step = num_ext_entries; |
1779 | } | |
1780 | } | |
1781 | } else if (entry_type == TYPE_EXTEND) { | |
1782 | if (is_feasible_entry) { | |
1783 | name_ep = (struct name_dentry_t *)ep; | |
1784 | ||
1785 | if ((++order) == 2) | |
1786 | uniname = p_uniname->name; | |
1787 | else | |
1788 | uniname += 15; | |
1789 | ||
1790 | len = extract_uni_name_from_name_entry(name_ep, | |
1791 | entry_uniname, order); | |
1792 | ||
179e14c8 VV |
1793 | unichar = *(uniname + len); |
1794 | *(uniname + len) = 0x0; | |
c48c9f7f VK |
1795 | |
1796 | if (nls_uniname_cmp(sb, uniname, entry_uniname)) { | |
dfa5b30b | 1797 | is_feasible_entry = false; |
c48c9f7f VK |
1798 | step = num_ext_entries - order + 1; |
1799 | } else if (order == num_ext_entries) { | |
1800 | p_fs->hint_uentry.dir = CLUSTER_32(~0); | |
1801 | p_fs->hint_uentry.entry = -1; | |
1802 | return dentry - (num_ext_entries); | |
1803 | } | |
1804 | ||
179e14c8 | 1805 | *(uniname + len) = unichar; |
c48c9f7f VK |
1806 | } |
1807 | } else { | |
dfa5b30b | 1808 | is_feasible_entry = false; |
c48c9f7f VK |
1809 | } |
1810 | } | |
1811 | ||
1812 | i += step; | |
1813 | dentry += step; | |
1814 | } | |
1815 | ||
1816 | i -= dentries_per_clu; | |
1817 | ||
1818 | if (p_dir->dir == CLUSTER_32(0)) | |
1819 | break; /* FAT16 root_dir */ | |
1820 | ||
1821 | if (clu.flags == 0x03) { | |
1822 | if ((--clu.size) > 0) | |
1823 | clu.dir++; | |
1824 | else | |
1825 | clu.dir = CLUSTER_32(~0); | |
1826 | } else { | |
65b88d81 | 1827 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
c48c9f7f VK |
1828 | return -2; |
1829 | } | |
1830 | } | |
1831 | ||
1832 | return -2; | |
1833 | } | |
1834 | ||
19e2bfe6 | 1835 | static s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir, |
c48c9f7f VK |
1836 | s32 entry, struct dentry_t *p_entry) |
1837 | { | |
1838 | int i, count = 0; | |
1839 | u32 type; | |
1840 | struct file_dentry_t *file_ep = (struct file_dentry_t *)p_entry; | |
1841 | struct dentry_t *ext_ep; | |
1842 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1843 | ||
1844 | for (i = 0, entry++; i < file_ep->num_ext; i++, entry++) { | |
1845 | ext_ep = get_entry_in_dir(sb, p_dir, entry, NULL); | |
1846 | if (!ext_ep) | |
1847 | return -1; | |
1848 | ||
1849 | type = p_fs->fs_func->get_entry_type(ext_ep); | |
1850 | if ((type == TYPE_EXTEND) || (type == TYPE_STREAM)) | |
1851 | count++; | |
1852 | else | |
1853 | return count; | |
1854 | } | |
1855 | ||
1856 | return count; | |
1857 | } | |
1858 | ||
1859 | s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir, | |
1860 | u32 type) | |
1861 | { | |
1862 | int i, count = 0; | |
1863 | s32 dentries_per_clu; | |
1864 | u32 entry_type; | |
1865 | struct chain_t clu; | |
1866 | struct dentry_t *ep; | |
1867 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1868 | ||
1869 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1870 | dentries_per_clu = p_fs->dentries_in_root; | |
1871 | else | |
1872 | dentries_per_clu = p_fs->dentries_per_clu; | |
1873 | ||
1874 | clu.dir = p_dir->dir; | |
1875 | clu.size = p_dir->size; | |
1876 | clu.flags = p_dir->flags; | |
1877 | ||
1878 | while (clu.dir != CLUSTER_32(~0)) { | |
1879 | if (p_fs->dev_ejected) | |
1880 | break; | |
1881 | ||
1882 | for (i = 0; i < dentries_per_clu; i++) { | |
1883 | ep = get_entry_in_dir(sb, &clu, i, NULL); | |
1884 | if (!ep) | |
a75500c5 | 1885 | return -ENOENT; |
c48c9f7f VK |
1886 | |
1887 | entry_type = p_fs->fs_func->get_entry_type(ep); | |
1888 | ||
1889 | if (entry_type == TYPE_UNUSED) | |
1890 | return count; | |
1891 | if (!(type & TYPE_CRITICAL_PRI) && | |
1892 | !(type & TYPE_BENIGN_PRI)) | |
1893 | continue; | |
1894 | ||
1895 | if ((type == TYPE_ALL) || (type == entry_type)) | |
1896 | count++; | |
1897 | } | |
1898 | ||
1899 | if (p_dir->dir == CLUSTER_32(0)) | |
1900 | break; /* FAT16 root_dir */ | |
1901 | ||
1902 | if (clu.flags == 0x03) { | |
1903 | if ((--clu.size) > 0) | |
1904 | clu.dir++; | |
1905 | else | |
1906 | clu.dir = CLUSTER_32(~0); | |
1907 | } else { | |
65b88d81 | 1908 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
a75500c5 | 1909 | return -EIO; |
c48c9f7f VK |
1910 | } |
1911 | } | |
1912 | ||
1913 | return count; | |
1914 | } | |
1915 | ||
1916 | bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir) | |
1917 | { | |
1918 | int i, count = 0; | |
1919 | s32 dentries_per_clu; | |
1920 | u32 type; | |
1921 | struct chain_t clu; | |
1922 | struct dentry_t *ep; | |
1923 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
1924 | ||
1925 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
1926 | dentries_per_clu = p_fs->dentries_in_root; | |
1927 | else | |
1928 | dentries_per_clu = p_fs->dentries_per_clu; | |
1929 | ||
1930 | clu.dir = p_dir->dir; | |
1931 | clu.size = p_dir->size; | |
1932 | clu.flags = p_dir->flags; | |
1933 | ||
1934 | while (clu.dir != CLUSTER_32(~0)) { | |
1935 | if (p_fs->dev_ejected) | |
1936 | break; | |
1937 | ||
1938 | for (i = 0; i < dentries_per_clu; i++) { | |
1939 | ep = get_entry_in_dir(sb, &clu, i, NULL); | |
1940 | if (!ep) | |
1941 | break; | |
1942 | ||
1943 | type = p_fs->fs_func->get_entry_type(ep); | |
1944 | ||
1945 | if (type == TYPE_UNUSED) | |
dfa5b30b | 1946 | return true; |
c48c9f7f VK |
1947 | if ((type != TYPE_FILE) && (type != TYPE_DIR)) |
1948 | continue; | |
1949 | ||
1950 | if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */ | |
dfa5b30b | 1951 | return false; |
c48c9f7f VK |
1952 | |
1953 | if (p_fs->vol_type == EXFAT) | |
dfa5b30b | 1954 | return false; |
c48c9f7f | 1955 | if ((p_dir->dir == p_fs->root_dir) || ((++count) > 2)) |
dfa5b30b | 1956 | return false; |
c48c9f7f VK |
1957 | } |
1958 | ||
1959 | if (p_dir->dir == CLUSTER_32(0)) | |
1960 | break; /* FAT16 root_dir */ | |
1961 | ||
1962 | if (clu.flags == 0x03) { | |
1963 | if ((--clu.size) > 0) | |
1964 | clu.dir++; | |
1965 | else | |
1966 | clu.dir = CLUSTER_32(~0); | |
1967 | } | |
65b88d81 | 1968 | if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0) |
c48c9f7f VK |
1969 | break; |
1970 | } | |
1971 | ||
dfa5b30b | 1972 | return true; |
c48c9f7f VK |
1973 | } |
1974 | ||
1975 | /* | |
1976 | * Name Conversion Functions | |
1977 | */ | |
1978 | ||
1979 | /* input : dir, uni_name | |
1980 | * output : num_of_entry, dos_name(format : aaaaaa~1.bbb) | |
1981 | */ | |
1982 | s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir, | |
1983 | struct uni_name_t *p_uniname, s32 *entries, | |
1984 | struct dos_name_t *p_dosname) | |
1985 | { | |
2a17b09f | 1986 | s32 num_entries; |
c48c9f7f VK |
1987 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); |
1988 | ||
1989 | num_entries = p_fs->fs_func->calc_num_entries(p_uniname); | |
1990 | if (num_entries == 0) | |
03eac8d5 | 1991 | return -EINVAL; |
c48c9f7f | 1992 | |
c48c9f7f VK |
1993 | *entries = num_entries; |
1994 | ||
4b186721 | 1995 | return 0; |
c48c9f7f VK |
1996 | } |
1997 | ||
19e2bfe6 | 1998 | static void exfat_get_uni_name_from_ext_entry(struct super_block *sb, |
c48c9f7f VK |
1999 | struct chain_t *p_dir, s32 entry, |
2000 | u16 *uniname) | |
2001 | { | |
2002 | int i; | |
2003 | struct dentry_t *ep; | |
2004 | struct entry_set_cache_t *es; | |
2005 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2006 | ||
2007 | es = get_entry_set_in_dir(sb, p_dir, entry, ES_ALL_ENTRIES, &ep); | |
3b531807 | 2008 | if (!es || es->num_entries < 3) { |
c48c9f7f VK |
2009 | if (es) |
2010 | release_entry_set(es); | |
2011 | return; | |
2012 | } | |
2013 | ||
2014 | ep += 2; | |
2015 | ||
2016 | /* | |
2017 | * First entry : file entry | |
2018 | * Second entry : stream-extension entry | |
2019 | * Third entry : first file-name entry | |
2020 | * So, the index of first file-name dentry should start from 2. | |
2021 | */ | |
2022 | for (i = 2; i < es->num_entries; i++, ep++) { | |
2023 | if (p_fs->fs_func->get_entry_type(ep) == TYPE_EXTEND) | |
2024 | extract_uni_name_from_name_entry((struct name_dentry_t *) | |
2025 | ep, uniname, i); | |
2026 | else | |
2027 | goto out; | |
2028 | uniname += 15; | |
2029 | } | |
2030 | ||
2031 | out: | |
2032 | release_entry_set(es); | |
2033 | } | |
2034 | ||
19e2bfe6 | 2035 | static s32 exfat_calc_num_entries(struct uni_name_t *p_uniname) |
c48c9f7f VK |
2036 | { |
2037 | s32 len; | |
2038 | ||
2039 | len = p_uniname->name_len; | |
2040 | if (len == 0) | |
2041 | return 0; | |
2042 | ||
2043 | /* 1 file entry + 1 stream entry + name entries */ | |
2044 | return (len - 1) / 15 + 3; | |
2045 | } | |
2046 | ||
c48c9f7f VK |
2047 | u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type) |
2048 | { | |
2049 | int i; | |
2050 | u8 *c = (u8 *)data; | |
2051 | ||
2052 | switch (type) { | |
2053 | case CS_DIR_ENTRY: | |
2054 | for (i = 0; i < len; i++, c++) { | |
2055 | if ((i == 2) || (i == 3)) | |
2056 | continue; | |
2057 | chksum = (((chksum & 1) << 15) | | |
2058 | ((chksum & 0xFFFE) >> 1)) + (u16)*c; | |
2059 | } | |
2060 | break; | |
2061 | default | |
2062 | : | |
2063 | for (i = 0; i < len; i++, c++) | |
2064 | chksum = (((chksum & 1) << 15) | | |
2065 | ((chksum & 0xFFFE) >> 1)) + (u16)*c; | |
2066 | } | |
2067 | ||
2068 | return chksum; | |
2069 | } | |
2070 | ||
c48c9f7f VK |
2071 | /* |
2072 | * Name Resolution Functions | |
2073 | */ | |
2074 | ||
2075 | /* return values of resolve_path() | |
2076 | * > 0 : return the length of the path | |
2077 | * < 0 : return error | |
2078 | */ | |
2079 | s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir, | |
2080 | struct uni_name_t *p_uniname) | |
2081 | { | |
2082 | bool lossy = false; | |
2083 | struct super_block *sb = inode->i_sb; | |
2084 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2085 | struct file_id_t *fid = &(EXFAT_I(inode)->fid); | |
2086 | ||
56a583d2 | 2087 | if (strscpy(name_buf, path, sizeof(name_buf)) < 0) |
03eac8d5 | 2088 | return -EINVAL; |
c48c9f7f | 2089 | |
c48c9f7f VK |
2090 | nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy); |
2091 | if (lossy) | |
03eac8d5 | 2092 | return -EINVAL; |
c48c9f7f VK |
2093 | |
2094 | fid->size = i_size_read(inode); | |
2095 | ||
2096 | p_dir->dir = fid->start_clu; | |
2097 | p_dir->size = (s32)(fid->size >> p_fs->cluster_size_bits); | |
2098 | p_dir->flags = fid->flags; | |
2099 | ||
4b186721 | 2100 | return 0; |
c48c9f7f VK |
2101 | } |
2102 | ||
2103 | /* | |
2104 | * File Operation Functions | |
2105 | */ | |
c48c9f7f VK |
2106 | static struct fs_func exfat_fs_func = { |
2107 | .alloc_cluster = exfat_alloc_cluster, | |
2108 | .free_cluster = exfat_free_cluster, | |
2109 | .count_used_clusters = exfat_count_used_clusters, | |
2110 | ||
2111 | .init_dir_entry = exfat_init_dir_entry, | |
2112 | .init_ext_entry = exfat_init_ext_entry, | |
2113 | .find_dir_entry = exfat_find_dir_entry, | |
2114 | .delete_dir_entry = exfat_delete_dir_entry, | |
2115 | .get_uni_name_from_ext_entry = exfat_get_uni_name_from_ext_entry, | |
2116 | .count_ext_entries = exfat_count_ext_entries, | |
2117 | .calc_num_entries = exfat_calc_num_entries, | |
2118 | ||
2119 | .get_entry_type = exfat_get_entry_type, | |
2120 | .set_entry_type = exfat_set_entry_type, | |
2121 | .get_entry_attr = exfat_get_entry_attr, | |
2122 | .set_entry_attr = exfat_set_entry_attr, | |
2123 | .get_entry_flag = exfat_get_entry_flag, | |
2124 | .set_entry_flag = exfat_set_entry_flag, | |
2125 | .get_entry_clu0 = exfat_get_entry_clu0, | |
2126 | .set_entry_clu0 = exfat_set_entry_clu0, | |
2127 | .get_entry_size = exfat_get_entry_size, | |
2128 | .set_entry_size = exfat_set_entry_size, | |
2129 | .get_entry_time = exfat_get_entry_time, | |
2130 | .set_entry_time = exfat_set_entry_time, | |
2131 | }; | |
2132 | ||
2133 | s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr) | |
2134 | { | |
2135 | struct bpbex_t *p_bpb = (struct bpbex_t *)p_pbr->bpb; | |
2136 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2137 | struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info); | |
2138 | ||
2139 | if (p_bpb->num_fats == 0) | |
133c8874 | 2140 | return -EFSCORRUPTED; |
c48c9f7f VK |
2141 | |
2142 | p_fs->sectors_per_clu = 1 << p_bpb->sectors_per_clu_bits; | |
2143 | p_fs->sectors_per_clu_bits = p_bpb->sectors_per_clu_bits; | |
2144 | p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits + | |
2145 | p_bd->sector_size_bits; | |
2146 | p_fs->cluster_size = 1 << p_fs->cluster_size_bits; | |
2147 | ||
2148 | p_fs->num_FAT_sectors = GET32(p_bpb->fat_length); | |
2149 | ||
2150 | p_fs->FAT1_start_sector = p_fs->PBR_sector + GET32(p_bpb->fat_offset); | |
2151 | if (p_bpb->num_fats == 1) | |
2152 | p_fs->FAT2_start_sector = p_fs->FAT1_start_sector; | |
2153 | else | |
2154 | p_fs->FAT2_start_sector = p_fs->FAT1_start_sector + | |
2155 | p_fs->num_FAT_sectors; | |
2156 | ||
2157 | p_fs->root_start_sector = p_fs->PBR_sector + GET32(p_bpb->clu_offset); | |
2158 | p_fs->data_start_sector = p_fs->root_start_sector; | |
2159 | ||
2160 | p_fs->num_sectors = GET64(p_bpb->vol_length); | |
2161 | p_fs->num_clusters = GET32(p_bpb->clu_count) + 2; | |
2162 | /* because the cluster index starts with 2 */ | |
2163 | ||
2164 | p_fs->vol_type = EXFAT; | |
2165 | p_fs->vol_id = GET32(p_bpb->vol_serial); | |
2166 | ||
2167 | p_fs->root_dir = GET32(p_bpb->root_cluster); | |
2168 | p_fs->dentries_in_root = 0; | |
2169 | p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits - | |
2170 | DENTRY_SIZE_BITS); | |
2171 | ||
2172 | p_fs->vol_flag = (u32)GET16(p_bpb->vol_flags); | |
2173 | p_fs->clu_srch_ptr = 2; | |
4e35a0d8 | 2174 | p_fs->used_clusters = UINT_MAX; |
c48c9f7f VK |
2175 | |
2176 | p_fs->fs_func = &exfat_fs_func; | |
2177 | ||
4b186721 | 2178 | return 0; |
c48c9f7f VK |
2179 | } |
2180 | ||
2181 | s32 create_dir(struct inode *inode, struct chain_t *p_dir, | |
2182 | struct uni_name_t *p_uniname, struct file_id_t *fid) | |
2183 | { | |
2184 | s32 ret, dentry, num_entries; | |
2185 | u64 size; | |
2186 | struct chain_t clu; | |
2a17b09f | 2187 | struct dos_name_t dos_name; |
c48c9f7f VK |
2188 | struct super_block *sb = inode->i_sb; |
2189 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2190 | struct fs_func *fs_func = p_fs->fs_func; | |
2191 | ||
2192 | ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries, | |
2193 | &dos_name); | |
2194 | if (ret) | |
2195 | return ret; | |
2196 | ||
2197 | /* find_empty_entry must be called before alloc_cluster */ | |
2198 | dentry = find_empty_entry(inode, p_dir, num_entries); | |
2199 | if (dentry < 0) | |
2f2e2886 | 2200 | return -ENOSPC; |
c48c9f7f VK |
2201 | |
2202 | clu.dir = CLUSTER_32(~0); | |
2203 | clu.size = 0; | |
2204 | clu.flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; | |
2205 | ||
2206 | /* (1) allocate a cluster */ | |
2207 | ret = fs_func->alloc_cluster(sb, 1, &clu); | |
2208 | if (ret < 0) | |
a75500c5 | 2209 | return ret; |
c48c9f7f | 2210 | else if (ret == 0) |
2f2e2886 | 2211 | return -ENOSPC; |
c48c9f7f VK |
2212 | |
2213 | ret = clear_cluster(sb, clu.dir); | |
4b186721 | 2214 | if (ret != 0) |
c48c9f7f VK |
2215 | return ret; |
2216 | ||
2a17b09f | 2217 | size = p_fs->cluster_size; |
c48c9f7f VK |
2218 | |
2219 | /* (2) update the directory entry */ | |
2220 | /* make sub-dir entry in parent directory */ | |
2221 | ret = fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_DIR, clu.dir, | |
2222 | size); | |
4b186721 | 2223 | if (ret != 0) |
c48c9f7f VK |
2224 | return ret; |
2225 | ||
2226 | ret = fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname, | |
2227 | &dos_name); | |
4b186721 | 2228 | if (ret != 0) |
c48c9f7f VK |
2229 | return ret; |
2230 | ||
2231 | fid->dir.dir = p_dir->dir; | |
2232 | fid->dir.size = p_dir->size; | |
2233 | fid->dir.flags = p_dir->flags; | |
2234 | fid->entry = dentry; | |
2235 | ||
2236 | fid->attr = ATTR_SUBDIR; | |
2237 | fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; | |
2238 | fid->size = size; | |
2239 | fid->start_clu = clu.dir; | |
2240 | ||
2241 | fid->type = TYPE_DIR; | |
2242 | fid->rwoffset = 0; | |
2243 | fid->hint_last_off = -1; | |
2244 | ||
4b186721 | 2245 | return 0; |
c48c9f7f VK |
2246 | } |
2247 | ||
2248 | s32 create_file(struct inode *inode, struct chain_t *p_dir, | |
2249 | struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid) | |
2250 | { | |
2251 | s32 ret, dentry, num_entries; | |
2252 | struct dos_name_t dos_name; | |
2253 | struct super_block *sb = inode->i_sb; | |
2254 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2255 | struct fs_func *fs_func = p_fs->fs_func; | |
2256 | ||
2257 | ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries, | |
2258 | &dos_name); | |
2259 | if (ret) | |
2260 | return ret; | |
2261 | ||
2262 | /* find_empty_entry must be called before alloc_cluster() */ | |
2263 | dentry = find_empty_entry(inode, p_dir, num_entries); | |
2264 | if (dentry < 0) | |
2f2e2886 | 2265 | return -ENOSPC; |
c48c9f7f VK |
2266 | |
2267 | /* (1) update the directory entry */ | |
2268 | /* fill the dos name directory entry information of the created file. | |
2269 | * the first cluster is not determined yet. (0) | |
2270 | */ | |
2271 | ret = fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_FILE | mode, | |
2272 | CLUSTER_32(0), 0); | |
4b186721 | 2273 | if (ret != 0) |
c48c9f7f VK |
2274 | return ret; |
2275 | ||
2276 | ret = fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname, | |
2277 | &dos_name); | |
4b186721 | 2278 | if (ret != 0) |
c48c9f7f VK |
2279 | return ret; |
2280 | ||
2281 | fid->dir.dir = p_dir->dir; | |
2282 | fid->dir.size = p_dir->size; | |
2283 | fid->dir.flags = p_dir->flags; | |
2284 | fid->entry = dentry; | |
2285 | ||
2286 | fid->attr = ATTR_ARCHIVE | mode; | |
2287 | fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; | |
2288 | fid->size = 0; | |
2289 | fid->start_clu = CLUSTER_32(~0); | |
2290 | ||
2291 | fid->type = TYPE_FILE; | |
2292 | fid->rwoffset = 0; | |
2293 | fid->hint_last_off = -1; | |
2294 | ||
4b186721 | 2295 | return 0; |
c48c9f7f VK |
2296 | } |
2297 | ||
2298 | void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry) | |
2299 | { | |
2300 | s32 num_entries; | |
2301 | sector_t sector; | |
2302 | struct dentry_t *ep; | |
2303 | struct super_block *sb = inode->i_sb; | |
2304 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2305 | struct fs_func *fs_func = p_fs->fs_func; | |
2306 | ||
2307 | ep = get_entry_in_dir(sb, p_dir, entry, §or); | |
2308 | if (!ep) | |
2309 | return; | |
2310 | ||
99a4b135 | 2311 | exfat_buf_lock(sb, sector); |
c48c9f7f | 2312 | |
99a4b135 | 2313 | /* exfat_buf_lock() before call count_ext_entries() */ |
c48c9f7f VK |
2314 | num_entries = fs_func->count_ext_entries(sb, p_dir, entry, ep); |
2315 | if (num_entries < 0) { | |
99a4b135 | 2316 | exfat_buf_unlock(sb, sector); |
c48c9f7f VK |
2317 | return; |
2318 | } | |
2319 | num_entries++; | |
2320 | ||
99a4b135 | 2321 | exfat_buf_unlock(sb, sector); |
c48c9f7f VK |
2322 | |
2323 | /* (1) update the directory entry */ | |
2324 | fs_func->delete_dir_entry(sb, p_dir, entry, 0, num_entries); | |
2325 | } | |
2326 | ||
1af73a25 BH |
2327 | s32 exfat_rename_file(struct inode *inode, struct chain_t *p_dir, s32 oldentry, |
2328 | struct uni_name_t *p_uniname, struct file_id_t *fid) | |
c48c9f7f VK |
2329 | { |
2330 | s32 ret, newentry = -1, num_old_entries, num_new_entries; | |
2331 | sector_t sector_old, sector_new; | |
2332 | struct dos_name_t dos_name; | |
2333 | struct dentry_t *epold, *epnew; | |
2334 | struct super_block *sb = inode->i_sb; | |
2335 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2336 | struct fs_func *fs_func = p_fs->fs_func; | |
2337 | ||
2338 | epold = get_entry_in_dir(sb, p_dir, oldentry, §or_old); | |
2339 | if (!epold) | |
a75500c5 | 2340 | return -ENOENT; |
c48c9f7f | 2341 | |
99a4b135 | 2342 | exfat_buf_lock(sb, sector_old); |
c48c9f7f | 2343 | |
99a4b135 | 2344 | /* exfat_buf_lock() before call count_ext_entries() */ |
c48c9f7f VK |
2345 | num_old_entries = fs_func->count_ext_entries(sb, p_dir, oldentry, |
2346 | epold); | |
2347 | if (num_old_entries < 0) { | |
99a4b135 | 2348 | exfat_buf_unlock(sb, sector_old); |
a75500c5 | 2349 | return -ENOENT; |
c48c9f7f VK |
2350 | } |
2351 | num_old_entries++; | |
2352 | ||
2353 | ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, | |
2354 | &num_new_entries, &dos_name); | |
2355 | if (ret) { | |
99a4b135 | 2356 | exfat_buf_unlock(sb, sector_old); |
c48c9f7f VK |
2357 | return ret; |
2358 | } | |
2359 | ||
2360 | if (num_old_entries < num_new_entries) { | |
2361 | newentry = find_empty_entry(inode, p_dir, num_new_entries); | |
2362 | if (newentry < 0) { | |
99a4b135 | 2363 | exfat_buf_unlock(sb, sector_old); |
2f2e2886 | 2364 | return -ENOSPC; |
c48c9f7f VK |
2365 | } |
2366 | ||
2367 | epnew = get_entry_in_dir(sb, p_dir, newentry, §or_new); | |
2368 | if (!epnew) { | |
99a4b135 | 2369 | exfat_buf_unlock(sb, sector_old); |
a75500c5 | 2370 | return -ENOENT; |
c48c9f7f VK |
2371 | } |
2372 | ||
2373 | memcpy((void *)epnew, (void *)epold, DENTRY_SIZE); | |
2374 | if (fs_func->get_entry_type(epnew) == TYPE_FILE) { | |
2375 | fs_func->set_entry_attr(epnew, | |
2376 | fs_func->get_entry_attr(epnew) | | |
2377 | ATTR_ARCHIVE); | |
2378 | fid->attr |= ATTR_ARCHIVE; | |
2379 | } | |
99a4b135 VK |
2380 | exfat_buf_modify(sb, sector_new); |
2381 | exfat_buf_unlock(sb, sector_old); | |
c48c9f7f | 2382 | |
2a17b09f VK |
2383 | epold = get_entry_in_dir(sb, p_dir, oldentry + 1, |
2384 | §or_old); | |
99a4b135 | 2385 | exfat_buf_lock(sb, sector_old); |
2a17b09f VK |
2386 | epnew = get_entry_in_dir(sb, p_dir, newentry + 1, |
2387 | §or_new); | |
c48c9f7f | 2388 | |
2a17b09f | 2389 | if (!epold || !epnew) { |
99a4b135 | 2390 | exfat_buf_unlock(sb, sector_old); |
2a17b09f | 2391 | return -ENOENT; |
c48c9f7f VK |
2392 | } |
2393 | ||
2a17b09f | 2394 | memcpy((void *)epnew, (void *)epold, DENTRY_SIZE); |
99a4b135 VK |
2395 | exfat_buf_modify(sb, sector_new); |
2396 | exfat_buf_unlock(sb, sector_old); | |
2a17b09f | 2397 | |
c48c9f7f VK |
2398 | ret = fs_func->init_ext_entry(sb, p_dir, newentry, |
2399 | num_new_entries, p_uniname, | |
2400 | &dos_name); | |
4b186721 | 2401 | if (ret != 0) |
c48c9f7f VK |
2402 | return ret; |
2403 | ||
2404 | fs_func->delete_dir_entry(sb, p_dir, oldentry, 0, | |
2405 | num_old_entries); | |
2406 | fid->entry = newentry; | |
2407 | } else { | |
2408 | if (fs_func->get_entry_type(epold) == TYPE_FILE) { | |
2409 | fs_func->set_entry_attr(epold, | |
2410 | fs_func->get_entry_attr(epold) | | |
2411 | ATTR_ARCHIVE); | |
2412 | fid->attr |= ATTR_ARCHIVE; | |
2413 | } | |
99a4b135 VK |
2414 | exfat_buf_modify(sb, sector_old); |
2415 | exfat_buf_unlock(sb, sector_old); | |
c48c9f7f VK |
2416 | |
2417 | ret = fs_func->init_ext_entry(sb, p_dir, oldentry, | |
2418 | num_new_entries, p_uniname, | |
2419 | &dos_name); | |
4b186721 | 2420 | if (ret != 0) |
c48c9f7f VK |
2421 | return ret; |
2422 | ||
2423 | fs_func->delete_dir_entry(sb, p_dir, oldentry, num_new_entries, | |
2424 | num_old_entries); | |
2425 | } | |
2426 | ||
4b186721 | 2427 | return 0; |
c48c9f7f VK |
2428 | } |
2429 | ||
2430 | s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry, | |
2431 | struct chain_t *p_newdir, struct uni_name_t *p_uniname, | |
2432 | struct file_id_t *fid) | |
2433 | { | |
2434 | s32 ret, newentry, num_new_entries, num_old_entries; | |
2435 | sector_t sector_mov, sector_new; | |
c48c9f7f VK |
2436 | struct dos_name_t dos_name; |
2437 | struct dentry_t *epmov, *epnew; | |
2438 | struct super_block *sb = inode->i_sb; | |
2439 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); | |
2440 | struct fs_func *fs_func = p_fs->fs_func; | |
2441 | ||
2442 | epmov = get_entry_in_dir(sb, p_olddir, oldentry, §or_mov); | |
2443 | if (!epmov) | |
a75500c5 | 2444 | return -ENOENT; |
c48c9f7f VK |
2445 | |
2446 | /* check if the source and target directory is the same */ | |
2447 | if (fs_func->get_entry_type(epmov) == TYPE_DIR && | |
2448 | fs_func->get_entry_clu0(epmov) == p_newdir->dir) | |
03eac8d5 | 2449 | return -EINVAL; |
c48c9f7f | 2450 | |
99a4b135 | 2451 | exfat_buf_lock(sb, sector_mov); |
c48c9f7f | 2452 | |
99a4b135 | 2453 | /* exfat_buf_lock() before call count_ext_entries() */ |
c48c9f7f VK |
2454 | num_old_entries = fs_func->count_ext_entries(sb, p_olddir, oldentry, |
2455 | epmov); | |
2456 | if (num_old_entries < 0) { | |
99a4b135 | 2457 | exfat_buf_unlock(sb, sector_mov); |
a75500c5 | 2458 | return -ENOENT; |
c48c9f7f VK |
2459 | } |
2460 | num_old_entries++; | |
2461 | ||
2462 | ret = get_num_entries_and_dos_name(sb, p_newdir, p_uniname, | |
2463 | &num_new_entries, &dos_name); | |
2464 | if (ret) { | |
99a4b135 | 2465 | exfat_buf_unlock(sb, sector_mov); |
c48c9f7f VK |
2466 | return ret; |
2467 | } | |
2468 | ||
2469 | newentry = find_empty_entry(inode, p_newdir, num_new_entries); | |
2470 | if (newentry < 0) { | |
99a4b135 | 2471 | exfat_buf_unlock(sb, sector_mov); |
2f2e2886 | 2472 | return -ENOSPC; |
c48c9f7f VK |
2473 | } |
2474 | ||
2475 | epnew = get_entry_in_dir(sb, p_newdir, newentry, §or_new); | |
2476 | if (!epnew) { | |
99a4b135 | 2477 | exfat_buf_unlock(sb, sector_mov); |
a75500c5 | 2478 | return -ENOENT; |
c48c9f7f VK |
2479 | } |
2480 | ||
2481 | memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE); | |
2482 | if (fs_func->get_entry_type(epnew) == TYPE_FILE) { | |
2483 | fs_func->set_entry_attr(epnew, fs_func->get_entry_attr(epnew) | | |
2484 | ATTR_ARCHIVE); | |
2485 | fid->attr |= ATTR_ARCHIVE; | |
2486 | } | |
99a4b135 VK |
2487 | exfat_buf_modify(sb, sector_new); |
2488 | exfat_buf_unlock(sb, sector_mov); | |
c48c9f7f | 2489 | |
2a17b09f VK |
2490 | epmov = get_entry_in_dir(sb, p_olddir, oldentry + 1, |
2491 | §or_mov); | |
99a4b135 | 2492 | exfat_buf_lock(sb, sector_mov); |
2a17b09f VK |
2493 | epnew = get_entry_in_dir(sb, p_newdir, newentry + 1, |
2494 | §or_new); | |
2495 | if (!epmov || !epnew) { | |
99a4b135 | 2496 | exfat_buf_unlock(sb, sector_mov); |
2a17b09f | 2497 | return -ENOENT; |
c48c9f7f VK |
2498 | } |
2499 | ||
2a17b09f | 2500 | memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE); |
99a4b135 VK |
2501 | exfat_buf_modify(sb, sector_new); |
2502 | exfat_buf_unlock(sb, sector_mov); | |
2a17b09f | 2503 | |
c48c9f7f VK |
2504 | ret = fs_func->init_ext_entry(sb, p_newdir, newentry, num_new_entries, |
2505 | p_uniname, &dos_name); | |
4b186721 | 2506 | if (ret != 0) |
c48c9f7f VK |
2507 | return ret; |
2508 | ||
2509 | fs_func->delete_dir_entry(sb, p_olddir, oldentry, 0, num_old_entries); | |
2510 | ||
2511 | fid->dir.dir = p_newdir->dir; | |
2512 | fid->dir.size = p_newdir->size; | |
2513 | fid->dir.flags = p_newdir->flags; | |
2514 | ||
2515 | fid->entry = newentry; | |
2516 | ||
4b186721 | 2517 | return 0; |
c48c9f7f VK |
2518 | } |
2519 | ||
2520 | /* | |
2521 | * Sector Read/Write Functions | |
2522 | */ | |
2523 | ||
2524 | int sector_read(struct super_block *sb, sector_t sec, struct buffer_head **bh, | |
2525 | bool read) | |
2526 | { | |
a75500c5 | 2527 | s32 ret = -EIO; |
c48c9f7f VK |
2528 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); |
2529 | ||
2530 | if ((sec >= (p_fs->PBR_sector + p_fs->num_sectors)) && | |
2531 | (p_fs->num_sectors > 0)) { | |
2532 | pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n", | |
2533 | __func__, (unsigned long long)sec); | |
2534 | fs_error(sb); | |
2535 | return ret; | |
2536 | } | |
2537 | ||
2538 | if (!p_fs->dev_ejected) { | |
ed5916c1 | 2539 | ret = exfat_bdev_read(sb, sec, bh, 1, read); |
4b186721 | 2540 | if (ret != 0) |
dfa5b30b | 2541 | p_fs->dev_ejected = 1; |
c48c9f7f VK |
2542 | } |
2543 | ||
2544 | return ret; | |
2545 | } | |
2546 | ||
2547 | int sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh, | |
2548 | bool sync) | |
2549 | { | |
a75500c5 | 2550 | s32 ret = -EIO; |
c48c9f7f VK |
2551 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); |
2552 | ||
2553 | if (sec >= (p_fs->PBR_sector + p_fs->num_sectors) && | |
2554 | (p_fs->num_sectors > 0)) { | |
2555 | pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n", | |
2556 | __func__, (unsigned long long)sec); | |
2557 | fs_error(sb); | |
2558 | return ret; | |
2559 | } | |
2560 | ||
2561 | if (!bh) { | |
2562 | pr_err("[EXFAT] %s: bh is NULL!\n", __func__); | |
2563 | fs_error(sb); | |
2564 | return ret; | |
2565 | } | |
2566 | ||
2567 | if (!p_fs->dev_ejected) { | |
ed5916c1 | 2568 | ret = exfat_bdev_write(sb, sec, bh, 1, sync); |
4b186721 | 2569 | if (ret != 0) |
dfa5b30b | 2570 | p_fs->dev_ejected = 1; |
c48c9f7f VK |
2571 | } |
2572 | ||
2573 | return ret; | |
2574 | } | |
2575 | ||
2576 | int multi_sector_read(struct super_block *sb, sector_t sec, | |
2577 | struct buffer_head **bh, s32 num_secs, bool read) | |
2578 | { | |
a75500c5 | 2579 | s32 ret = -EIO; |
c48c9f7f VK |
2580 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); |
2581 | ||
2582 | if (((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors)) && | |
2583 | (p_fs->num_sectors > 0)) { | |
2584 | pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n", | |
2585 | __func__, (unsigned long long)sec, num_secs); | |
2586 | fs_error(sb); | |
2587 | return ret; | |
2588 | } | |
2589 | ||
2590 | if (!p_fs->dev_ejected) { | |
ed5916c1 | 2591 | ret = exfat_bdev_read(sb, sec, bh, num_secs, read); |
4b186721 | 2592 | if (ret != 0) |
dfa5b30b | 2593 | p_fs->dev_ejected = 1; |
c48c9f7f VK |
2594 | } |
2595 | ||
2596 | return ret; | |
2597 | } | |
2598 | ||
2599 | int multi_sector_write(struct super_block *sb, sector_t sec, | |
2600 | struct buffer_head *bh, s32 num_secs, bool sync) | |
2601 | { | |
a75500c5 | 2602 | s32 ret = -EIO; |
c48c9f7f VK |
2603 | struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); |
2604 | ||
2605 | if ((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors) && | |
2606 | (p_fs->num_sectors > 0)) { | |
2607 | pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n", | |
2608 | __func__, (unsigned long long)sec, num_secs); | |
2609 | fs_error(sb); | |
2610 | return ret; | |
2611 | } | |
2612 | if (!bh) { | |
2613 | pr_err("[EXFAT] %s: bh is NULL!\n", __func__); | |
2614 | fs_error(sb); | |
2615 | return ret; | |
2616 | } | |
2617 | ||
2618 | if (!p_fs->dev_ejected) { | |
ed5916c1 | 2619 | ret = exfat_bdev_write(sb, sec, bh, num_secs, sync); |
4b186721 | 2620 | if (ret != 0) |
dfa5b30b | 2621 | p_fs->dev_ejected = 1; |
c48c9f7f VK |
2622 | } |
2623 | ||
2624 | return ret; | |
2625 | } |