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1 | /* |
2 | * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #ifndef _SDFAT_DEFRAG_H | |
19 | #define _SDFAT_DEFRAG_H | |
20 | ||
21 | #ifdef CONFIG_SDFAT_DFR | |
22 | ||
23 | /* Tuning parameters */ | |
24 | #define DFR_MIN_TIMEOUT (1 * HZ) // Minimum timeout for forced-sync | |
25 | #define DFR_DEFAULT_TIMEOUT (10 * HZ) // Default timeout for forced-sync | |
26 | ||
27 | #define DFR_DEFAULT_CLEAN_RATIO (50) // Wake-up daemon when clean AU ratio under 50% | |
28 | #define DFR_DEFAULT_WAKEUP_RATIO (10) // Wake-up daemon when clean AU ratio under 10%, regardless of frag_ratio | |
29 | ||
30 | #define DFR_DEFAULT_FRAG_RATIO (130) // Wake-up daemon when frag_ratio over 130% | |
31 | ||
32 | #define DFR_DEFAULT_PACKING_RATIO (10) // Call allocator with PACKING flag, when clean AU ratio under 10% | |
33 | ||
34 | #define DFR_DEFAULT_STOP_RATIO (98) // Stop defrag_daemon when disk used ratio over 98% | |
35 | #define DFR_FULL_RATIO (100) | |
36 | ||
37 | #define DFR_MAX_AU_MOVED (16) // Maximum # of AUs for a request | |
38 | ||
39 | ||
40 | /* Debugging support*/ | |
41 | #define dfr_err(fmt, args...) pr_err("DFR: " fmt "\n", args) | |
42 | ||
43 | #ifdef CONFIG_SDFAT_DFR_DEBUG | |
44 | #define dfr_debug(fmt, args...) pr_debug("DFR: " fmt "\n", args) | |
45 | #else | |
46 | #define dfr_debug(fmt, args...) | |
47 | #endif | |
48 | ||
49 | ||
50 | /* Error handling */ | |
51 | #define ERR_HANDLE(err) { \ | |
52 | if (err) { \ | |
53 | dfr_debug("err %d", err); \ | |
54 | goto error; \ | |
55 | } \ | |
56 | } | |
57 | ||
58 | #define ERR_HANDLE2(cond, err, val) { \ | |
59 | if (cond) { \ | |
60 | err = val; \ | |
61 | dfr_debug("err %d", err); \ | |
62 | goto error; \ | |
63 | } \ | |
64 | } | |
65 | ||
66 | ||
67 | /* Arguments IN-OUT */ | |
68 | #define IN | |
69 | #define OUT | |
70 | #define INOUT | |
71 | ||
72 | ||
73 | /* Macros */ | |
74 | #define GET64_HI(var64) ((unsigned int)((var64) >> 32)) | |
75 | #define GET64_LO(var64) ((unsigned int)(((var64) << 32) >> 32)) | |
76 | #define SET64_HI(dst64, var32) { (dst64) = ((loff_t)(var32) << 32) | ((dst64) & 0x00000000ffffffffLL); } | |
77 | #define SET64_LO(dst64, var32) { (dst64) = ((dst64) & 0xffffffff00000000LL) | ((var32) & 0x00000000ffffffffLL); } | |
78 | ||
79 | #define GET32_HI(var32) ((unsigned short)((var32) >> 16)) | |
80 | #define GET32_LO(var32) ((unsigned short)(((var32) << 16) >> 16)) | |
81 | #define SET32_HI(dst32, var16) { (dst32) = ((unsigned int)(var16) << 16) | ((dst32) & 0x0000ffff); } | |
82 | #define SET32_LO(dst32, var16) { (dst32) = ((dst32) & 0xffff0000) | ((unsigned int)(var16) & 0x0000ffff); } | |
83 | ||
84 | ||
85 | /* FAT32 related */ | |
86 | #define FAT32_EOF (0x0fffffff) | |
87 | #define FAT32_RESERVED (0x0ffffff7) | |
88 | #define FAT32_UNUSED_CLUS (2) | |
89 | ||
90 | #define CLUS_PER_AU(sb) ( \ | |
91 | (SDFAT_SB(sb)->options.amap_opt.sect_per_au) >> (SDFAT_SB(sb)->fsi.sect_per_clus_bits) \ | |
92 | ) | |
93 | #define PAGES_PER_AU(sb) ( \ | |
94 | ((SDFAT_SB(sb)->options.amap_opt.sect_per_au) << ((sb)->s_blocksize_bits)) \ | |
95 | >> PAGE_SHIFT \ | |
96 | ) | |
97 | #define PAGES_PER_CLUS(sb) ((SDFAT_SB(sb)->fsi.cluster_size) >> PAGE_SHIFT) | |
98 | ||
99 | #define FAT32_CHECK_CLUSTER(fsi, clus, err) \ | |
100 | { \ | |
101 | if (((clus) < FAT32_UNUSED_CLUS) || \ | |
102 | ((clus) > (fsi)->num_clusters) || \ | |
103 | ((clus) >= FAT32_RESERVED)) { \ | |
104 | dfr_err("clus %08x, fsi->num_clusters %08x", (clus), (fsi)->num_clusters); \ | |
105 | err = -EINVAL; \ | |
106 | } else { \ | |
107 | err = 0; \ | |
108 | } \ | |
109 | } | |
110 | ||
111 | ||
112 | /* IOCTL_DFR_INFO */ | |
113 | struct defrag_info_arg { | |
114 | /* PBS info */ | |
115 | unsigned int sec_sz; | |
116 | unsigned int clus_sz; | |
117 | unsigned long long total_sec; | |
118 | unsigned long long fat_offset_sec; | |
119 | unsigned int fat_sz_sec; | |
120 | unsigned int n_fat; | |
121 | unsigned int hidden_sectors; | |
122 | ||
123 | /* AU info */ | |
124 | unsigned int sec_per_au; | |
125 | }; | |
126 | ||
127 | ||
128 | /* IOC_DFR_TRAV */ | |
129 | #define DFR_TRAV_HEADER_IDX (0) | |
130 | ||
131 | #define DFR_TRAV_TYPE_HEADER (0x0000000F) | |
132 | #define DFR_TRAV_TYPE_DIR (1) | |
133 | #define DFR_TRAV_TYPE_FILE (2) | |
134 | #define DFR_TRAV_TYPE_TEST (DFR_TRAV_TYPE_HEADER | 0x10000000) | |
135 | ||
136 | #define DFR_TRAV_ROOT_IPOS (0xFFFFFFFFFFFFFFFFLL) | |
137 | ||
138 | struct defrag_trav_arg { | |
139 | int type; | |
140 | unsigned int start_clus; | |
141 | loff_t i_pos; | |
142 | char name[MAX_DOSNAME_BUF_SIZE]; | |
143 | char dummy1; | |
144 | int dummy2; | |
145 | }; | |
146 | ||
147 | #define DFR_TRAV_STAT_DONE (0x1) | |
148 | #define DFR_TRAV_STAT_MORE (0x2) | |
149 | #define DFR_TRAV_STAT_ERR (0xFF) | |
150 | ||
151 | struct defrag_trav_header { | |
152 | int type; | |
153 | unsigned int start_clus; | |
154 | loff_t i_pos; | |
155 | char name[MAX_DOSNAME_BUF_SIZE]; | |
156 | char stat; | |
157 | unsigned int nr_entries; | |
158 | }; | |
159 | ||
160 | ||
161 | /* IOC_DFR_REQ */ | |
162 | #define REQ_HEADER_IDX (0) | |
163 | ||
164 | #define DFR_CHUNK_STAT_ERR (0xFFFFFFFF) | |
165 | #define DFR_CHUNK_STAT_REQ (0x1) | |
166 | #define DFR_CHUNK_STAT_WB (0x2) | |
167 | #define DFR_CHUNK_STAT_FAT (0x4) | |
168 | #define DFR_CHUNK_STAT_PREP (DFR_CHUNK_STAT_REQ | DFR_CHUNK_STAT_WB | DFR_CHUNK_STAT_FAT) | |
169 | #define DFR_CHUNK_STAT_PASS (0x0000000F) | |
170 | ||
171 | struct defrag_chunk_header { | |
172 | int mode; | |
173 | unsigned int nr_chunks; | |
174 | loff_t dummy1; | |
175 | int dummy2[4]; | |
176 | union { | |
177 | int *dummy3; | |
178 | int dummy4; | |
179 | }; | |
180 | int dummy5; | |
181 | }; | |
182 | ||
183 | struct defrag_chunk_info { | |
184 | int stat; | |
185 | /* File related */ | |
186 | unsigned int f_clus; | |
187 | loff_t i_pos; | |
188 | /* Cluster related */ | |
189 | unsigned int d_clus; | |
190 | unsigned int nr_clus; | |
191 | unsigned int prev_clus; | |
192 | unsigned int next_clus; | |
193 | union { | |
194 | void *dummy; | |
195 | /* req status */ | |
196 | unsigned int new_idx; | |
197 | }; | |
198 | /* AU related */ | |
199 | unsigned int au_clus; | |
200 | }; | |
201 | ||
202 | ||
203 | /* Global info */ | |
204 | #define DFR_MODE_BACKGROUND (0x1) | |
205 | #define DFR_MODE_FOREGROUND (0x2) | |
206 | #define DFR_MODE_ONESHOT (0x4) | |
207 | #define DFR_MODE_BATCHED (0x8) | |
208 | #define DFR_MODE_TEST (DFR_MODE_BACKGROUND | 0x10000000) | |
209 | ||
210 | #define DFR_SB_STAT_IDLE (0) | |
211 | #define DFR_SB_STAT_REQ (1) | |
212 | #define DFR_SB_STAT_VALID (2) | |
213 | ||
214 | #define DFR_INO_STAT_IDLE (0) | |
215 | #define DFR_INO_STAT_REQ (1) | |
216 | struct defrag_info { | |
217 | struct mutex lock; | |
218 | atomic_t stat; | |
219 | struct defrag_chunk_info *chunks; | |
220 | unsigned int nr_chunks; | |
221 | struct list_head entry; | |
222 | }; | |
223 | ||
224 | ||
225 | /* SPO test flags */ | |
226 | #define DFR_SPO_NONE (0) | |
227 | #define DFR_SPO_NORMAL (1) | |
228 | #define DFR_SPO_DISCARD (2) | |
229 | #define DFR_SPO_FAT_NEXT (3) | |
230 | #define DFR_SPO_RANDOM (4) | |
231 | ||
232 | ||
233 | /* Extern functions */ | |
234 | int defrag_get_info(struct super_block *sb, struct defrag_info_arg *arg); | |
235 | ||
236 | int defrag_scan_dir(struct super_block *sb, struct defrag_trav_arg *arg); | |
237 | ||
238 | int defrag_validate_cluster(struct inode *inode, struct defrag_chunk_info *chunk, int skip_prev); | |
239 | int defrag_reserve_clusters(struct super_block *sb, int nr_clus); | |
240 | int defrag_mark_ignore(struct super_block *sb, unsigned int clus); | |
241 | void defrag_unmark_ignore_all(struct super_block *sb); | |
242 | ||
243 | int defrag_map_cluster(struct inode *inode, unsigned int clu_offset, unsigned int *clu); | |
244 | void defrag_writepage_end_io(struct page *page); | |
245 | ||
246 | void defrag_update_fat_prev(struct super_block *sb, int force); | |
247 | void defrag_update_fat_next(struct super_block *sb); | |
248 | void defrag_check_discard(struct super_block *sb); | |
249 | int defrag_free_cluster(struct super_block *sb, unsigned int clus); | |
250 | ||
251 | int defrag_check_defrag_required(struct super_block *sb, int *totalau, int *cleanau, int *fullau); | |
252 | int defrag_check_defrag_on(struct inode *inode, loff_t start, loff_t end, int cancel, const char *caller); | |
253 | ||
254 | #ifdef CONFIG_SDFAT_DFR_DEBUG | |
255 | void defrag_spo_test(struct super_block *sb, int flag, const char *caller); | |
256 | #endif | |
257 | ||
258 | #endif /* CONFIG_SDFAT_DFR */ | |
259 | ||
260 | #endif /* _SDFAT_DEFRAG_H */ | |
261 |