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Commit | Line | Data |
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0a8165d7 | 1 | /* |
39a53e0c JK |
2 | * fs/f2fs/node.h |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | /* start node id of a node block dedicated to the given node id */ | |
68afcf2d | 12 | #define START_NID(nid) (((nid) / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK) |
39a53e0c JK |
13 | |
14 | /* node block offset on the NAT area dedicated to the given start node id */ | |
68afcf2d | 15 | #define NAT_BLOCK_OFFSET(start_nid) ((start_nid) / NAT_ENTRY_PER_BLOCK) |
39a53e0c | 16 | |
ea1a29a0 | 17 | /* # of pages to perform synchronous readahead before building free nids */ |
ad4edb83 JK |
18 | #define FREE_NID_PAGES 8 |
19 | #define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES) | |
39a53e0c | 20 | |
ad4edb83 | 21 | #define DEF_RA_NID_PAGES 0 /* # of nid pages to be readaheaded */ |
ea1a29a0 | 22 | |
39a53e0c JK |
23 | /* maximum readahead size for node during getting data blocks */ |
24 | #define MAX_RA_NODE 128 | |
25 | ||
cdfc41c1 | 26 | /* control the memory footprint threshold (10MB per 1GB ram) */ |
29710bcf | 27 | #define DEF_RAM_THRESHOLD 1 |
cdfc41c1 | 28 | |
7d768d2c CY |
29 | /* control dirty nats ratio threshold (default: 10% over max nid count) */ |
30 | #define DEF_DIRTY_NAT_RATIO_THRESHOLD 10 | |
e589c2c4 JK |
31 | /* control total # of nats */ |
32 | #define DEF_NAT_CACHE_THRESHOLD 100000 | |
7d768d2c | 33 | |
39a53e0c JK |
34 | /* vector size for gang look-up from nat cache that consists of radix tree */ |
35 | #define NATVEC_SIZE 64 | |
7aed0d45 | 36 | #define SETVEC_SIZE 32 |
39a53e0c | 37 | |
56ae674c JK |
38 | /* return value for read_node_page */ |
39 | #define LOCKED_PAGE 1 | |
40 | ||
5c27f4ee CY |
41 | /* For flag in struct node_info */ |
42 | enum { | |
43 | IS_CHECKPOINTED, /* is it checkpointed before? */ | |
44 | HAS_FSYNCED_INODE, /* is the inode fsynced before? */ | |
45 | HAS_LAST_FSYNC, /* has the latest node fsync mark? */ | |
46 | IS_DIRTY, /* this nat entry is dirty? */ | |
47 | }; | |
48 | ||
39a53e0c JK |
49 | /* |
50 | * For node information | |
51 | */ | |
52 | struct node_info { | |
53 | nid_t nid; /* node id */ | |
54 | nid_t ino; /* inode number of the node's owner */ | |
55 | block_t blk_addr; /* block address of the node */ | |
56 | unsigned char version; /* version of the node */ | |
5c27f4ee | 57 | unsigned char flag; /* for node information bits */ |
7ef35e3b JK |
58 | }; |
59 | ||
39a53e0c JK |
60 | struct nat_entry { |
61 | struct list_head list; /* for clean or dirty nat list */ | |
39a53e0c JK |
62 | struct node_info ni; /* in-memory node information */ |
63 | }; | |
64 | ||
68afcf2d TK |
65 | #define nat_get_nid(nat) ((nat)->ni.nid) |
66 | #define nat_set_nid(nat, n) ((nat)->ni.nid = (n)) | |
67 | #define nat_get_blkaddr(nat) ((nat)->ni.blk_addr) | |
68 | #define nat_set_blkaddr(nat, b) ((nat)->ni.blk_addr = (b)) | |
69 | #define nat_get_ino(nat) ((nat)->ni.ino) | |
70 | #define nat_set_ino(nat, i) ((nat)->ni.ino = (i)) | |
71 | #define nat_get_version(nat) ((nat)->ni.version) | |
72 | #define nat_set_version(nat, v) ((nat)->ni.version = (v)) | |
39a53e0c | 73 | |
68afcf2d | 74 | #define inc_node_version(version) (++(version)) |
39a53e0c | 75 | |
5c27f4ee CY |
76 | static inline void copy_node_info(struct node_info *dst, |
77 | struct node_info *src) | |
78 | { | |
79 | dst->nid = src->nid; | |
80 | dst->ino = src->ino; | |
81 | dst->blk_addr = src->blk_addr; | |
82 | dst->version = src->version; | |
83 | /* should not copy flag here */ | |
84 | } | |
85 | ||
7ef35e3b JK |
86 | static inline void set_nat_flag(struct nat_entry *ne, |
87 | unsigned int type, bool set) | |
88 | { | |
89 | unsigned char mask = 0x01 << type; | |
90 | if (set) | |
5c27f4ee | 91 | ne->ni.flag |= mask; |
7ef35e3b | 92 | else |
5c27f4ee | 93 | ne->ni.flag &= ~mask; |
7ef35e3b JK |
94 | } |
95 | ||
96 | static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type) | |
97 | { | |
98 | unsigned char mask = 0x01 << type; | |
5c27f4ee | 99 | return ne->ni.flag & mask; |
7ef35e3b JK |
100 | } |
101 | ||
88bd02c9 JK |
102 | static inline void nat_reset_flag(struct nat_entry *ne) |
103 | { | |
104 | /* these states can be set only after checkpoint was done */ | |
105 | set_nat_flag(ne, IS_CHECKPOINTED, true); | |
106 | set_nat_flag(ne, HAS_FSYNCED_INODE, false); | |
107 | set_nat_flag(ne, HAS_LAST_FSYNC, true); | |
108 | } | |
109 | ||
39a53e0c JK |
110 | static inline void node_info_from_raw_nat(struct node_info *ni, |
111 | struct f2fs_nat_entry *raw_ne) | |
112 | { | |
113 | ni->ino = le32_to_cpu(raw_ne->ino); | |
114 | ni->blk_addr = le32_to_cpu(raw_ne->block_addr); | |
115 | ni->version = raw_ne->version; | |
116 | } | |
117 | ||
94dac22e CY |
118 | static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, |
119 | struct node_info *ni) | |
120 | { | |
121 | raw_ne->ino = cpu_to_le32(ni->ino); | |
122 | raw_ne->block_addr = cpu_to_le32(ni->blk_addr); | |
123 | raw_ne->version = ni->version; | |
124 | } | |
125 | ||
7d768d2c CY |
126 | static inline bool excess_dirty_nats(struct f2fs_sb_info *sbi) |
127 | { | |
128 | return NM_I(sbi)->dirty_nat_cnt >= NM_I(sbi)->max_nid * | |
2304cb0c | 129 | NM_I(sbi)->dirty_nats_ratio / 100; |
7d768d2c CY |
130 | } |
131 | ||
e589c2c4 JK |
132 | static inline bool excess_cached_nats(struct f2fs_sb_info *sbi) |
133 | { | |
134 | return NM_I(sbi)->nat_cnt >= DEF_NAT_CACHE_THRESHOLD; | |
135 | } | |
136 | ||
6fb03f3a | 137 | enum mem_type { |
cdfc41c1 | 138 | FREE_NIDS, /* indicates the free nid list */ |
6fb03f3a | 139 | NAT_ENTRIES, /* indicates the cached nat entry */ |
a1257023 | 140 | DIRTY_DENTS, /* indicates dirty dentry pages */ |
e5e7ea3c | 141 | INO_ENTRIES, /* indicates inode entries */ |
13054c54 | 142 | EXTENT_CACHE, /* indicates extent cache */ |
1e84371f | 143 | BASE_CHECK, /* check kernel status */ |
cdfc41c1 JK |
144 | }; |
145 | ||
aec71382 | 146 | struct nat_entry_set { |
309cc2b6 | 147 | struct list_head set_list; /* link with other nat sets */ |
aec71382 | 148 | struct list_head entry_list; /* link with dirty nat entries */ |
309cc2b6 | 149 | nid_t set; /* set number*/ |
aec71382 CY |
150 | unsigned int entry_cnt; /* the # of nat entries in set */ |
151 | }; | |
152 | ||
39a53e0c JK |
153 | struct free_nid { |
154 | struct list_head list; /* for free node id list */ | |
155 | nid_t nid; /* node id */ | |
9a4ffdf5 | 156 | int state; /* in use or not: FREE_NID or PREALLOC_NID */ |
39a53e0c JK |
157 | }; |
158 | ||
120c2cba | 159 | static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) |
39a53e0c JK |
160 | { |
161 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
162 | struct free_nid *fnid; | |
163 | ||
b8559dc2 | 164 | spin_lock(&nm_i->nid_list_lock); |
9a4ffdf5 | 165 | if (nm_i->nid_cnt[FREE_NID] <= 0) { |
b8559dc2 | 166 | spin_unlock(&nm_i->nid_list_lock); |
120c2cba | 167 | return; |
c6e48930 | 168 | } |
9a4ffdf5 | 169 | fnid = list_first_entry(&nm_i->free_nid_list, struct free_nid, list); |
39a53e0c | 170 | *nid = fnid->nid; |
b8559dc2 | 171 | spin_unlock(&nm_i->nid_list_lock); |
39a53e0c JK |
172 | } |
173 | ||
174 | /* | |
175 | * inline functions | |
176 | */ | |
177 | static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) | |
178 | { | |
179 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
599a09b2 CY |
180 | |
181 | #ifdef CONFIG_F2FS_CHECK_FS | |
182 | if (memcmp(nm_i->nat_bitmap, nm_i->nat_bitmap_mir, | |
183 | nm_i->bitmap_size)) | |
184 | f2fs_bug_on(sbi, 1); | |
185 | #endif | |
39a53e0c JK |
186 | memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size); |
187 | } | |
188 | ||
189 | static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) | |
190 | { | |
191 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
192 | pgoff_t block_off; | |
193 | pgoff_t block_addr; | |
39a53e0c | 194 | |
8a6aa325 FL |
195 | /* |
196 | * block_off = segment_off * 512 + off_in_segment | |
197 | * OLD = (segment_off * 512) * 2 + off_in_segment | |
198 | * NEW = 2 * (segment_off * 512 + off_in_segment) - off_in_segment | |
199 | */ | |
39a53e0c | 200 | block_off = NAT_BLOCK_OFFSET(start); |
39a53e0c JK |
201 | |
202 | block_addr = (pgoff_t)(nm_i->nat_blkaddr + | |
8a6aa325 | 203 | (block_off << 1) - |
3519e3f9 | 204 | (block_off & (sbi->blocks_per_seg - 1))); |
39a53e0c JK |
205 | |
206 | if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) | |
207 | block_addr += sbi->blocks_per_seg; | |
208 | ||
209 | return block_addr; | |
210 | } | |
211 | ||
212 | static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, | |
213 | pgoff_t block_addr) | |
214 | { | |
215 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
216 | ||
217 | block_addr -= nm_i->nat_blkaddr; | |
72fdbe2e | 218 | block_addr ^= 1 << sbi->log_blocks_per_seg; |
39a53e0c JK |
219 | return block_addr + nm_i->nat_blkaddr; |
220 | } | |
221 | ||
222 | static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) | |
223 | { | |
224 | unsigned int block_off = NAT_BLOCK_OFFSET(start_nid); | |
225 | ||
c6ac4c0e | 226 | f2fs_change_bit(block_off, nm_i->nat_bitmap); |
599a09b2 CY |
227 | #ifdef CONFIG_F2FS_CHECK_FS |
228 | f2fs_change_bit(block_off, nm_i->nat_bitmap_mir); | |
229 | #endif | |
39a53e0c JK |
230 | } |
231 | ||
a468f0ef JK |
232 | static inline nid_t ino_of_node(struct page *node_page) |
233 | { | |
234 | struct f2fs_node *rn = F2FS_NODE(node_page); | |
235 | return le32_to_cpu(rn->footer.ino); | |
236 | } | |
237 | ||
238 | static inline nid_t nid_of_node(struct page *node_page) | |
239 | { | |
240 | struct f2fs_node *rn = F2FS_NODE(node_page); | |
241 | return le32_to_cpu(rn->footer.nid); | |
242 | } | |
243 | ||
244 | static inline unsigned int ofs_of_node(struct page *node_page) | |
245 | { | |
246 | struct f2fs_node *rn = F2FS_NODE(node_page); | |
247 | unsigned flag = le32_to_cpu(rn->footer.flag); | |
248 | return flag >> OFFSET_BIT_SHIFT; | |
249 | } | |
250 | ||
251 | static inline __u64 cpver_of_node(struct page *node_page) | |
252 | { | |
253 | struct f2fs_node *rn = F2FS_NODE(node_page); | |
254 | return le64_to_cpu(rn->footer.cp_ver); | |
255 | } | |
256 | ||
257 | static inline block_t next_blkaddr_of_node(struct page *node_page) | |
258 | { | |
259 | struct f2fs_node *rn = F2FS_NODE(node_page); | |
260 | return le32_to_cpu(rn->footer.next_blkaddr); | |
261 | } | |
262 | ||
39a53e0c JK |
263 | static inline void fill_node_footer(struct page *page, nid_t nid, |
264 | nid_t ino, unsigned int ofs, bool reset) | |
265 | { | |
45590710 | 266 | struct f2fs_node *rn = F2FS_NODE(page); |
09eb483e JK |
267 | unsigned int old_flag = 0; |
268 | ||
39a53e0c JK |
269 | if (reset) |
270 | memset(rn, 0, sizeof(*rn)); | |
09eb483e JK |
271 | else |
272 | old_flag = le32_to_cpu(rn->footer.flag); | |
273 | ||
39a53e0c JK |
274 | rn->footer.nid = cpu_to_le32(nid); |
275 | rn->footer.ino = cpu_to_le32(ino); | |
09eb483e JK |
276 | |
277 | /* should remain old flag bits such as COLD_BIT_SHIFT */ | |
278 | rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) | | |
279 | (old_flag & OFFSET_BIT_MASK)); | |
39a53e0c JK |
280 | } |
281 | ||
282 | static inline void copy_node_footer(struct page *dst, struct page *src) | |
283 | { | |
45590710 GZ |
284 | struct f2fs_node *src_rn = F2FS_NODE(src); |
285 | struct f2fs_node *dst_rn = F2FS_NODE(dst); | |
39a53e0c JK |
286 | memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); |
287 | } | |
288 | ||
289 | static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) | |
290 | { | |
4081363f | 291 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page)); |
45590710 | 292 | struct f2fs_node *rn = F2FS_NODE(page); |
ced2c7ea KM |
293 | __u64 cp_ver = cur_cp_version(ckpt); |
294 | ||
295 | if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) | |
296 | cp_ver |= (cur_cp_crc(ckpt) << 32); | |
45590710 | 297 | |
a468f0ef | 298 | rn->footer.cp_ver = cpu_to_le64(cp_ver); |
25ca923b | 299 | rn->footer.next_blkaddr = cpu_to_le32(blkaddr); |
39a53e0c JK |
300 | } |
301 | ||
a468f0ef | 302 | static inline bool is_recoverable_dnode(struct page *page) |
39a53e0c | 303 | { |
a468f0ef | 304 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page)); |
a468f0ef | 305 | __u64 cp_ver = cur_cp_version(ckpt); |
39a53e0c | 306 | |
ced2c7ea KM |
307 | if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) |
308 | cp_ver |= (cur_cp_crc(ckpt) << 32); | |
309 | ||
0c0b471e | 310 | return cp_ver == cpver_of_node(page); |
39a53e0c JK |
311 | } |
312 | ||
313 | /* | |
314 | * f2fs assigns the following node offsets described as (num). | |
315 | * N = NIDS_PER_BLOCK | |
316 | * | |
317 | * Inode block (0) | |
318 | * |- direct node (1) | |
319 | * |- direct node (2) | |
320 | * |- indirect node (3) | |
321 | * | `- direct node (4 => 4 + N - 1) | |
322 | * |- indirect node (4 + N) | |
323 | * | `- direct node (5 + N => 5 + 2N - 1) | |
324 | * `- double indirect node (5 + 2N) | |
325 | * `- indirect node (6 + 2N) | |
4f4124d0 CY |
326 | * `- direct node |
327 | * ...... | |
328 | * `- indirect node ((6 + 2N) + x(N + 1)) | |
329 | * `- direct node | |
330 | * ...... | |
331 | * `- indirect node ((6 + 2N) + (N - 1)(N + 1)) | |
332 | * `- direct node | |
39a53e0c JK |
333 | */ |
334 | static inline bool IS_DNODE(struct page *node_page) | |
335 | { | |
336 | unsigned int ofs = ofs_of_node(node_page); | |
dbe6a5ff | 337 | |
4bc8e9bc | 338 | if (f2fs_has_xattr_block(ofs)) |
d260081c | 339 | return true; |
dbe6a5ff | 340 | |
39a53e0c JK |
341 | if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || |
342 | ofs == 5 + 2 * NIDS_PER_BLOCK) | |
343 | return false; | |
344 | if (ofs >= 6 + 2 * NIDS_PER_BLOCK) { | |
345 | ofs -= 6 + 2 * NIDS_PER_BLOCK; | |
3315101f | 346 | if (!((long int)ofs % (NIDS_PER_BLOCK + 1))) |
39a53e0c JK |
347 | return false; |
348 | } | |
349 | return true; | |
350 | } | |
351 | ||
12719ae1 | 352 | static inline int set_nid(struct page *p, int off, nid_t nid, bool i) |
39a53e0c | 353 | { |
45590710 | 354 | struct f2fs_node *rn = F2FS_NODE(p); |
39a53e0c | 355 | |
fec1d657 | 356 | f2fs_wait_on_page_writeback(p, NODE, true); |
39a53e0c JK |
357 | |
358 | if (i) | |
359 | rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid); | |
360 | else | |
361 | rn->in.nid[off] = cpu_to_le32(nid); | |
12719ae1 | 362 | return set_page_dirty(p); |
39a53e0c JK |
363 | } |
364 | ||
365 | static inline nid_t get_nid(struct page *p, int off, bool i) | |
366 | { | |
45590710 GZ |
367 | struct f2fs_node *rn = F2FS_NODE(p); |
368 | ||
39a53e0c JK |
369 | if (i) |
370 | return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); | |
371 | return le32_to_cpu(rn->in.nid[off]); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Coldness identification: | |
376 | * - Mark cold files in f2fs_inode_info | |
377 | * - Mark cold node blocks in their node footer | |
378 | * - Mark cold data pages in page cache | |
379 | */ | |
39a53e0c JK |
380 | static inline int is_cold_data(struct page *page) |
381 | { | |
382 | return PageChecked(page); | |
383 | } | |
384 | ||
385 | static inline void set_cold_data(struct page *page) | |
386 | { | |
387 | SetPageChecked(page); | |
388 | } | |
389 | ||
390 | static inline void clear_cold_data(struct page *page) | |
391 | { | |
392 | ClearPageChecked(page); | |
393 | } | |
394 | ||
a06a2416 | 395 | static inline int is_node(struct page *page, int type) |
39a53e0c | 396 | { |
45590710 | 397 | struct f2fs_node *rn = F2FS_NODE(page); |
a06a2416 | 398 | return le32_to_cpu(rn->footer.flag) & (1 << type); |
39a53e0c JK |
399 | } |
400 | ||
a06a2416 NJ |
401 | #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT) |
402 | #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT) | |
403 | #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT) | |
39a53e0c | 404 | |
2049d4fc JK |
405 | static inline int is_inline_node(struct page *page) |
406 | { | |
407 | return PageChecked(page); | |
408 | } | |
409 | ||
410 | static inline void set_inline_node(struct page *page) | |
411 | { | |
412 | SetPageChecked(page); | |
413 | } | |
414 | ||
415 | static inline void clear_inline_node(struct page *page) | |
416 | { | |
417 | ClearPageChecked(page); | |
418 | } | |
419 | ||
39a53e0c JK |
420 | static inline void set_cold_node(struct inode *inode, struct page *page) |
421 | { | |
45590710 | 422 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
423 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
424 | ||
425 | if (S_ISDIR(inode->i_mode)) | |
426 | flag &= ~(0x1 << COLD_BIT_SHIFT); | |
427 | else | |
428 | flag |= (0x1 << COLD_BIT_SHIFT); | |
429 | rn->footer.flag = cpu_to_le32(flag); | |
430 | } | |
431 | ||
a06a2416 | 432 | static inline void set_mark(struct page *page, int mark, int type) |
39a53e0c | 433 | { |
45590710 | 434 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
435 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
436 | if (mark) | |
a06a2416 | 437 | flag |= (0x1 << type); |
39a53e0c | 438 | else |
a06a2416 | 439 | flag &= ~(0x1 << type); |
39a53e0c JK |
440 | rn->footer.flag = cpu_to_le32(flag); |
441 | } | |
a06a2416 NJ |
442 | #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT) |
443 | #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT) |