Commit | Line | Data |
---|---|---|
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 */ | |
12 | #define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK) | |
13 | ||
14 | /* node block offset on the NAT area dedicated to the given start node id */ | |
15 | #define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK) | |
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 | ||
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) | |
73 | ||
39a53e0c JK |
74 | #define inc_node_version(version) (++version) |
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 | /* |
154 | * For free nid mangement | |
155 | */ | |
156 | enum nid_state { | |
157 | NID_NEW, /* newly added to free nid list */ | |
158 | NID_ALLOC /* it is allocated */ | |
159 | }; | |
160 | ||
161 | struct free_nid { | |
162 | struct list_head list; /* for free node id list */ | |
163 | nid_t nid; /* node id */ | |
164 | int state; /* in use or not: NID_NEW or NID_ALLOC */ | |
165 | }; | |
166 | ||
120c2cba | 167 | static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) |
39a53e0c JK |
168 | { |
169 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
170 | struct free_nid *fnid; | |
171 | ||
39a53e0c | 172 | spin_lock(&nm_i->free_nid_list_lock); |
c6e48930 HY |
173 | if (nm_i->fcnt <= 0) { |
174 | spin_unlock(&nm_i->free_nid_list_lock); | |
120c2cba | 175 | return; |
c6e48930 | 176 | } |
39a53e0c JK |
177 | fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list); |
178 | *nid = fnid->nid; | |
179 | spin_unlock(&nm_i->free_nid_list_lock); | |
39a53e0c JK |
180 | } |
181 | ||
182 | /* | |
183 | * inline functions | |
184 | */ | |
185 | static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) | |
186 | { | |
187 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
188 | memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size); | |
189 | } | |
190 | ||
191 | static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) | |
192 | { | |
193 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
194 | pgoff_t block_off; | |
195 | pgoff_t block_addr; | |
196 | int seg_off; | |
197 | ||
198 | block_off = NAT_BLOCK_OFFSET(start); | |
199 | seg_off = block_off >> sbi->log_blocks_per_seg; | |
200 | ||
201 | block_addr = (pgoff_t)(nm_i->nat_blkaddr + | |
202 | (seg_off << sbi->log_blocks_per_seg << 1) + | |
3519e3f9 | 203 | (block_off & (sbi->blocks_per_seg - 1))); |
39a53e0c JK |
204 | |
205 | if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) | |
206 | block_addr += sbi->blocks_per_seg; | |
207 | ||
208 | return block_addr; | |
209 | } | |
210 | ||
211 | static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, | |
212 | pgoff_t block_addr) | |
213 | { | |
214 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
215 | ||
216 | block_addr -= nm_i->nat_blkaddr; | |
217 | if ((block_addr >> sbi->log_blocks_per_seg) % 2) | |
218 | block_addr -= sbi->blocks_per_seg; | |
219 | else | |
220 | block_addr += sbi->blocks_per_seg; | |
221 | ||
222 | return block_addr + nm_i->nat_blkaddr; | |
223 | } | |
224 | ||
225 | static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) | |
226 | { | |
227 | unsigned int block_off = NAT_BLOCK_OFFSET(start_nid); | |
228 | ||
c6ac4c0e | 229 | f2fs_change_bit(block_off, nm_i->nat_bitmap); |
39a53e0c JK |
230 | } |
231 | ||
232 | static inline void fill_node_footer(struct page *page, nid_t nid, | |
233 | nid_t ino, unsigned int ofs, bool reset) | |
234 | { | |
45590710 | 235 | struct f2fs_node *rn = F2FS_NODE(page); |
09eb483e JK |
236 | unsigned int old_flag = 0; |
237 | ||
39a53e0c JK |
238 | if (reset) |
239 | memset(rn, 0, sizeof(*rn)); | |
09eb483e JK |
240 | else |
241 | old_flag = le32_to_cpu(rn->footer.flag); | |
242 | ||
39a53e0c JK |
243 | rn->footer.nid = cpu_to_le32(nid); |
244 | rn->footer.ino = cpu_to_le32(ino); | |
09eb483e JK |
245 | |
246 | /* should remain old flag bits such as COLD_BIT_SHIFT */ | |
247 | rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) | | |
248 | (old_flag & OFFSET_BIT_MASK)); | |
39a53e0c JK |
249 | } |
250 | ||
251 | static inline void copy_node_footer(struct page *dst, struct page *src) | |
252 | { | |
45590710 GZ |
253 | struct f2fs_node *src_rn = F2FS_NODE(src); |
254 | struct f2fs_node *dst_rn = F2FS_NODE(dst); | |
39a53e0c JK |
255 | memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); |
256 | } | |
257 | ||
258 | static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) | |
259 | { | |
4081363f | 260 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page)); |
45590710 GZ |
261 | struct f2fs_node *rn = F2FS_NODE(page); |
262 | ||
39a53e0c | 263 | rn->footer.cp_ver = ckpt->checkpoint_ver; |
25ca923b | 264 | rn->footer.next_blkaddr = cpu_to_le32(blkaddr); |
39a53e0c JK |
265 | } |
266 | ||
267 | static inline nid_t ino_of_node(struct page *node_page) | |
268 | { | |
45590710 | 269 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
270 | return le32_to_cpu(rn->footer.ino); |
271 | } | |
272 | ||
273 | static inline nid_t nid_of_node(struct page *node_page) | |
274 | { | |
45590710 | 275 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
276 | return le32_to_cpu(rn->footer.nid); |
277 | } | |
278 | ||
279 | static inline unsigned int ofs_of_node(struct page *node_page) | |
280 | { | |
45590710 | 281 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
282 | unsigned flag = le32_to_cpu(rn->footer.flag); |
283 | return flag >> OFFSET_BIT_SHIFT; | |
284 | } | |
285 | ||
286 | static inline unsigned long long cpver_of_node(struct page *node_page) | |
287 | { | |
45590710 | 288 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
289 | return le64_to_cpu(rn->footer.cp_ver); |
290 | } | |
291 | ||
292 | static inline block_t next_blkaddr_of_node(struct page *node_page) | |
293 | { | |
45590710 | 294 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
295 | return le32_to_cpu(rn->footer.next_blkaddr); |
296 | } | |
297 | ||
298 | /* | |
299 | * f2fs assigns the following node offsets described as (num). | |
300 | * N = NIDS_PER_BLOCK | |
301 | * | |
302 | * Inode block (0) | |
303 | * |- direct node (1) | |
304 | * |- direct node (2) | |
305 | * |- indirect node (3) | |
306 | * | `- direct node (4 => 4 + N - 1) | |
307 | * |- indirect node (4 + N) | |
308 | * | `- direct node (5 + N => 5 + 2N - 1) | |
309 | * `- double indirect node (5 + 2N) | |
310 | * `- indirect node (6 + 2N) | |
4f4124d0 CY |
311 | * `- direct node |
312 | * ...... | |
313 | * `- indirect node ((6 + 2N) + x(N + 1)) | |
314 | * `- direct node | |
315 | * ...... | |
316 | * `- indirect node ((6 + 2N) + (N - 1)(N + 1)) | |
317 | * `- direct node | |
39a53e0c JK |
318 | */ |
319 | static inline bool IS_DNODE(struct page *node_page) | |
320 | { | |
321 | unsigned int ofs = ofs_of_node(node_page); | |
dbe6a5ff | 322 | |
4bc8e9bc | 323 | if (f2fs_has_xattr_block(ofs)) |
dbe6a5ff JK |
324 | return false; |
325 | ||
39a53e0c JK |
326 | if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || |
327 | ofs == 5 + 2 * NIDS_PER_BLOCK) | |
328 | return false; | |
329 | if (ofs >= 6 + 2 * NIDS_PER_BLOCK) { | |
330 | ofs -= 6 + 2 * NIDS_PER_BLOCK; | |
3315101f | 331 | if (!((long int)ofs % (NIDS_PER_BLOCK + 1))) |
39a53e0c JK |
332 | return false; |
333 | } | |
334 | return true; | |
335 | } | |
336 | ||
12719ae1 | 337 | static inline int set_nid(struct page *p, int off, nid_t nid, bool i) |
39a53e0c | 338 | { |
45590710 | 339 | struct f2fs_node *rn = F2FS_NODE(p); |
39a53e0c | 340 | |
fec1d657 | 341 | f2fs_wait_on_page_writeback(p, NODE, true); |
39a53e0c JK |
342 | |
343 | if (i) | |
344 | rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid); | |
345 | else | |
346 | rn->in.nid[off] = cpu_to_le32(nid); | |
12719ae1 | 347 | return set_page_dirty(p); |
39a53e0c JK |
348 | } |
349 | ||
350 | static inline nid_t get_nid(struct page *p, int off, bool i) | |
351 | { | |
45590710 GZ |
352 | struct f2fs_node *rn = F2FS_NODE(p); |
353 | ||
39a53e0c JK |
354 | if (i) |
355 | return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); | |
356 | return le32_to_cpu(rn->in.nid[off]); | |
357 | } | |
358 | ||
359 | /* | |
360 | * Coldness identification: | |
361 | * - Mark cold files in f2fs_inode_info | |
362 | * - Mark cold node blocks in their node footer | |
363 | * - Mark cold data pages in page cache | |
364 | */ | |
39a53e0c JK |
365 | static inline int is_cold_data(struct page *page) |
366 | { | |
367 | return PageChecked(page); | |
368 | } | |
369 | ||
370 | static inline void set_cold_data(struct page *page) | |
371 | { | |
372 | SetPageChecked(page); | |
373 | } | |
374 | ||
375 | static inline void clear_cold_data(struct page *page) | |
376 | { | |
377 | ClearPageChecked(page); | |
378 | } | |
379 | ||
a06a2416 | 380 | static inline int is_node(struct page *page, int type) |
39a53e0c | 381 | { |
45590710 | 382 | struct f2fs_node *rn = F2FS_NODE(page); |
a06a2416 | 383 | return le32_to_cpu(rn->footer.flag) & (1 << type); |
39a53e0c JK |
384 | } |
385 | ||
a06a2416 NJ |
386 | #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT) |
387 | #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT) | |
388 | #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT) | |
39a53e0c | 389 | |
2049d4fc JK |
390 | static inline int is_inline_node(struct page *page) |
391 | { | |
392 | return PageChecked(page); | |
393 | } | |
394 | ||
395 | static inline void set_inline_node(struct page *page) | |
396 | { | |
397 | SetPageChecked(page); | |
398 | } | |
399 | ||
400 | static inline void clear_inline_node(struct page *page) | |
401 | { | |
402 | ClearPageChecked(page); | |
403 | } | |
404 | ||
39a53e0c JK |
405 | static inline void set_cold_node(struct inode *inode, struct page *page) |
406 | { | |
45590710 | 407 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
408 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
409 | ||
410 | if (S_ISDIR(inode->i_mode)) | |
411 | flag &= ~(0x1 << COLD_BIT_SHIFT); | |
412 | else | |
413 | flag |= (0x1 << COLD_BIT_SHIFT); | |
414 | rn->footer.flag = cpu_to_le32(flag); | |
415 | } | |
416 | ||
a06a2416 | 417 | static inline void set_mark(struct page *page, int mark, int type) |
39a53e0c | 418 | { |
45590710 | 419 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
420 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
421 | if (mark) | |
a06a2416 | 422 | flag |= (0x1 << type); |
39a53e0c | 423 | else |
a06a2416 | 424 | flag &= ~(0x1 << type); |
39a53e0c JK |
425 | rn->footer.flag = cpu_to_le32(flag); |
426 | } | |
a06a2416 NJ |
427 | #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT) |
428 | #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT) |