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 | ||
17 | /* # of pages to perform readahead before building free nids */ | |
18 | #define FREE_NID_PAGES 4 | |
19 | ||
39a53e0c JK |
20 | /* maximum readahead size for node during getting data blocks */ |
21 | #define MAX_RA_NODE 128 | |
22 | ||
cdfc41c1 JK |
23 | /* control the memory footprint threshold (10MB per 1GB ram) */ |
24 | #define DEF_RAM_THRESHOLD 10 | |
25 | ||
39a53e0c JK |
26 | /* vector size for gang look-up from nat cache that consists of radix tree */ |
27 | #define NATVEC_SIZE 64 | |
28 | ||
56ae674c JK |
29 | /* return value for read_node_page */ |
30 | #define LOCKED_PAGE 1 | |
31 | ||
39a53e0c JK |
32 | /* |
33 | * For node information | |
34 | */ | |
35 | struct node_info { | |
36 | nid_t nid; /* node id */ | |
37 | nid_t ino; /* inode number of the node's owner */ | |
38 | block_t blk_addr; /* block address of the node */ | |
39 | unsigned char version; /* version of the node */ | |
40 | }; | |
41 | ||
7ef35e3b JK |
42 | enum { |
43 | IS_CHECKPOINTED, /* is it checkpointed before? */ | |
88bd02c9 JK |
44 | HAS_FSYNCED_INODE, /* is the inode fsynced before? */ |
45 | HAS_LAST_FSYNC, /* has the latest node fsync mark? */ | |
309cc2b6 | 46 | IS_DIRTY, /* this nat entry is dirty? */ |
7ef35e3b JK |
47 | }; |
48 | ||
39a53e0c JK |
49 | struct nat_entry { |
50 | struct list_head list; /* for clean or dirty nat list */ | |
7ef35e3b | 51 | unsigned char flag; /* for node information bits */ |
39a53e0c JK |
52 | struct node_info ni; /* in-memory node information */ |
53 | }; | |
54 | ||
55 | #define nat_get_nid(nat) (nat->ni.nid) | |
56 | #define nat_set_nid(nat, n) (nat->ni.nid = n) | |
57 | #define nat_get_blkaddr(nat) (nat->ni.blk_addr) | |
58 | #define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b) | |
59 | #define nat_get_ino(nat) (nat->ni.ino) | |
60 | #define nat_set_ino(nat, i) (nat->ni.ino = i) | |
61 | #define nat_get_version(nat) (nat->ni.version) | |
62 | #define nat_set_version(nat, v) (nat->ni.version = v) | |
63 | ||
39a53e0c JK |
64 | #define inc_node_version(version) (++version) |
65 | ||
7ef35e3b JK |
66 | static inline void set_nat_flag(struct nat_entry *ne, |
67 | unsigned int type, bool set) | |
68 | { | |
69 | unsigned char mask = 0x01 << type; | |
70 | if (set) | |
71 | ne->flag |= mask; | |
72 | else | |
73 | ne->flag &= ~mask; | |
74 | } | |
75 | ||
76 | static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type) | |
77 | { | |
78 | unsigned char mask = 0x01 << type; | |
79 | return ne->flag & mask; | |
80 | } | |
81 | ||
88bd02c9 JK |
82 | static inline void nat_reset_flag(struct nat_entry *ne) |
83 | { | |
84 | /* these states can be set only after checkpoint was done */ | |
85 | set_nat_flag(ne, IS_CHECKPOINTED, true); | |
86 | set_nat_flag(ne, HAS_FSYNCED_INODE, false); | |
87 | set_nat_flag(ne, HAS_LAST_FSYNC, true); | |
88 | } | |
89 | ||
39a53e0c JK |
90 | static inline void node_info_from_raw_nat(struct node_info *ni, |
91 | struct f2fs_nat_entry *raw_ne) | |
92 | { | |
93 | ni->ino = le32_to_cpu(raw_ne->ino); | |
94 | ni->blk_addr = le32_to_cpu(raw_ne->block_addr); | |
95 | ni->version = raw_ne->version; | |
96 | } | |
97 | ||
94dac22e CY |
98 | static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, |
99 | struct node_info *ni) | |
100 | { | |
101 | raw_ne->ino = cpu_to_le32(ni->ino); | |
102 | raw_ne->block_addr = cpu_to_le32(ni->blk_addr); | |
103 | raw_ne->version = ni->version; | |
104 | } | |
105 | ||
6fb03f3a | 106 | enum mem_type { |
cdfc41c1 | 107 | FREE_NIDS, /* indicates the free nid list */ |
6fb03f3a JK |
108 | NAT_ENTRIES, /* indicates the cached nat entry */ |
109 | DIRTY_DENTS /* indicates dirty dentry pages */ | |
cdfc41c1 JK |
110 | }; |
111 | ||
aec71382 | 112 | struct nat_entry_set { |
309cc2b6 | 113 | struct list_head set_list; /* link with other nat sets */ |
aec71382 | 114 | struct list_head entry_list; /* link with dirty nat entries */ |
309cc2b6 | 115 | nid_t set; /* set number*/ |
aec71382 CY |
116 | unsigned int entry_cnt; /* the # of nat entries in set */ |
117 | }; | |
118 | ||
39a53e0c JK |
119 | /* |
120 | * For free nid mangement | |
121 | */ | |
122 | enum nid_state { | |
123 | NID_NEW, /* newly added to free nid list */ | |
124 | NID_ALLOC /* it is allocated */ | |
125 | }; | |
126 | ||
127 | struct free_nid { | |
128 | struct list_head list; /* for free node id list */ | |
129 | nid_t nid; /* node id */ | |
130 | int state; /* in use or not: NID_NEW or NID_ALLOC */ | |
131 | }; | |
132 | ||
120c2cba | 133 | static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) |
39a53e0c JK |
134 | { |
135 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
136 | struct free_nid *fnid; | |
137 | ||
39a53e0c | 138 | spin_lock(&nm_i->free_nid_list_lock); |
c6e48930 HY |
139 | if (nm_i->fcnt <= 0) { |
140 | spin_unlock(&nm_i->free_nid_list_lock); | |
120c2cba | 141 | return; |
c6e48930 | 142 | } |
39a53e0c JK |
143 | fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list); |
144 | *nid = fnid->nid; | |
145 | spin_unlock(&nm_i->free_nid_list_lock); | |
39a53e0c JK |
146 | } |
147 | ||
148 | /* | |
149 | * inline functions | |
150 | */ | |
151 | static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) | |
152 | { | |
153 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
154 | memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size); | |
155 | } | |
156 | ||
157 | static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) | |
158 | { | |
159 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
160 | pgoff_t block_off; | |
161 | pgoff_t block_addr; | |
162 | int seg_off; | |
163 | ||
164 | block_off = NAT_BLOCK_OFFSET(start); | |
165 | seg_off = block_off >> sbi->log_blocks_per_seg; | |
166 | ||
167 | block_addr = (pgoff_t)(nm_i->nat_blkaddr + | |
168 | (seg_off << sbi->log_blocks_per_seg << 1) + | |
169 | (block_off & ((1 << sbi->log_blocks_per_seg) - 1))); | |
170 | ||
171 | if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) | |
172 | block_addr += sbi->blocks_per_seg; | |
173 | ||
174 | return block_addr; | |
175 | } | |
176 | ||
177 | static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, | |
178 | pgoff_t block_addr) | |
179 | { | |
180 | struct f2fs_nm_info *nm_i = NM_I(sbi); | |
181 | ||
182 | block_addr -= nm_i->nat_blkaddr; | |
183 | if ((block_addr >> sbi->log_blocks_per_seg) % 2) | |
184 | block_addr -= sbi->blocks_per_seg; | |
185 | else | |
186 | block_addr += sbi->blocks_per_seg; | |
187 | ||
188 | return block_addr + nm_i->nat_blkaddr; | |
189 | } | |
190 | ||
191 | static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) | |
192 | { | |
193 | unsigned int block_off = NAT_BLOCK_OFFSET(start_nid); | |
194 | ||
195 | if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) | |
196 | f2fs_clear_bit(block_off, nm_i->nat_bitmap); | |
197 | else | |
198 | f2fs_set_bit(block_off, nm_i->nat_bitmap); | |
199 | } | |
200 | ||
201 | static inline void fill_node_footer(struct page *page, nid_t nid, | |
202 | nid_t ino, unsigned int ofs, bool reset) | |
203 | { | |
45590710 | 204 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
205 | if (reset) |
206 | memset(rn, 0, sizeof(*rn)); | |
207 | rn->footer.nid = cpu_to_le32(nid); | |
208 | rn->footer.ino = cpu_to_le32(ino); | |
209 | rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT); | |
210 | } | |
211 | ||
212 | static inline void copy_node_footer(struct page *dst, struct page *src) | |
213 | { | |
45590710 GZ |
214 | struct f2fs_node *src_rn = F2FS_NODE(src); |
215 | struct f2fs_node *dst_rn = F2FS_NODE(dst); | |
39a53e0c JK |
216 | memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); |
217 | } | |
218 | ||
219 | static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) | |
220 | { | |
4081363f | 221 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page)); |
45590710 GZ |
222 | struct f2fs_node *rn = F2FS_NODE(page); |
223 | ||
39a53e0c | 224 | rn->footer.cp_ver = ckpt->checkpoint_ver; |
25ca923b | 225 | rn->footer.next_blkaddr = cpu_to_le32(blkaddr); |
39a53e0c JK |
226 | } |
227 | ||
228 | static inline nid_t ino_of_node(struct page *node_page) | |
229 | { | |
45590710 | 230 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
231 | return le32_to_cpu(rn->footer.ino); |
232 | } | |
233 | ||
234 | static inline nid_t nid_of_node(struct page *node_page) | |
235 | { | |
45590710 | 236 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
237 | return le32_to_cpu(rn->footer.nid); |
238 | } | |
239 | ||
240 | static inline unsigned int ofs_of_node(struct page *node_page) | |
241 | { | |
45590710 | 242 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
243 | unsigned flag = le32_to_cpu(rn->footer.flag); |
244 | return flag >> OFFSET_BIT_SHIFT; | |
245 | } | |
246 | ||
247 | static inline unsigned long long cpver_of_node(struct page *node_page) | |
248 | { | |
45590710 | 249 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
250 | return le64_to_cpu(rn->footer.cp_ver); |
251 | } | |
252 | ||
253 | static inline block_t next_blkaddr_of_node(struct page *node_page) | |
254 | { | |
45590710 | 255 | struct f2fs_node *rn = F2FS_NODE(node_page); |
39a53e0c JK |
256 | return le32_to_cpu(rn->footer.next_blkaddr); |
257 | } | |
258 | ||
259 | /* | |
260 | * f2fs assigns the following node offsets described as (num). | |
261 | * N = NIDS_PER_BLOCK | |
262 | * | |
263 | * Inode block (0) | |
264 | * |- direct node (1) | |
265 | * |- direct node (2) | |
266 | * |- indirect node (3) | |
267 | * | `- direct node (4 => 4 + N - 1) | |
268 | * |- indirect node (4 + N) | |
269 | * | `- direct node (5 + N => 5 + 2N - 1) | |
270 | * `- double indirect node (5 + 2N) | |
271 | * `- indirect node (6 + 2N) | |
4f4124d0 CY |
272 | * `- direct node |
273 | * ...... | |
274 | * `- indirect node ((6 + 2N) + x(N + 1)) | |
275 | * `- direct node | |
276 | * ...... | |
277 | * `- indirect node ((6 + 2N) + (N - 1)(N + 1)) | |
278 | * `- direct node | |
39a53e0c JK |
279 | */ |
280 | static inline bool IS_DNODE(struct page *node_page) | |
281 | { | |
282 | unsigned int ofs = ofs_of_node(node_page); | |
dbe6a5ff | 283 | |
4bc8e9bc | 284 | if (f2fs_has_xattr_block(ofs)) |
dbe6a5ff JK |
285 | return false; |
286 | ||
39a53e0c JK |
287 | if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || |
288 | ofs == 5 + 2 * NIDS_PER_BLOCK) | |
289 | return false; | |
290 | if (ofs >= 6 + 2 * NIDS_PER_BLOCK) { | |
291 | ofs -= 6 + 2 * NIDS_PER_BLOCK; | |
3315101f | 292 | if (!((long int)ofs % (NIDS_PER_BLOCK + 1))) |
39a53e0c JK |
293 | return false; |
294 | } | |
295 | return true; | |
296 | } | |
297 | ||
298 | static inline void set_nid(struct page *p, int off, nid_t nid, bool i) | |
299 | { | |
45590710 | 300 | struct f2fs_node *rn = F2FS_NODE(p); |
39a53e0c | 301 | |
54b591df | 302 | f2fs_wait_on_page_writeback(p, NODE); |
39a53e0c JK |
303 | |
304 | if (i) | |
305 | rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid); | |
306 | else | |
307 | rn->in.nid[off] = cpu_to_le32(nid); | |
308 | set_page_dirty(p); | |
309 | } | |
310 | ||
311 | static inline nid_t get_nid(struct page *p, int off, bool i) | |
312 | { | |
45590710 GZ |
313 | struct f2fs_node *rn = F2FS_NODE(p); |
314 | ||
39a53e0c JK |
315 | if (i) |
316 | return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); | |
317 | return le32_to_cpu(rn->in.nid[off]); | |
318 | } | |
319 | ||
320 | /* | |
321 | * Coldness identification: | |
322 | * - Mark cold files in f2fs_inode_info | |
323 | * - Mark cold node blocks in their node footer | |
324 | * - Mark cold data pages in page cache | |
325 | */ | |
a06a2416 | 326 | static inline int is_file(struct inode *inode, int type) |
39a53e0c | 327 | { |
a06a2416 | 328 | return F2FS_I(inode)->i_advise & type; |
39a53e0c JK |
329 | } |
330 | ||
a06a2416 | 331 | static inline void set_file(struct inode *inode, int type) |
953a3e27 | 332 | { |
a06a2416 | 333 | F2FS_I(inode)->i_advise |= type; |
953a3e27 JK |
334 | } |
335 | ||
354a3399 JK |
336 | static inline void clear_file(struct inode *inode, int type) |
337 | { | |
338 | F2FS_I(inode)->i_advise &= ~type; | |
339 | } | |
340 | ||
341 | #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT) | |
342 | #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT) | |
343 | #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT) | |
344 | #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT) | |
345 | #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT) | |
346 | #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT) | |
953a3e27 | 347 | |
39a53e0c JK |
348 | static inline int is_cold_data(struct page *page) |
349 | { | |
350 | return PageChecked(page); | |
351 | } | |
352 | ||
353 | static inline void set_cold_data(struct page *page) | |
354 | { | |
355 | SetPageChecked(page); | |
356 | } | |
357 | ||
358 | static inline void clear_cold_data(struct page *page) | |
359 | { | |
360 | ClearPageChecked(page); | |
361 | } | |
362 | ||
a06a2416 | 363 | static inline int is_node(struct page *page, int type) |
39a53e0c | 364 | { |
45590710 | 365 | struct f2fs_node *rn = F2FS_NODE(page); |
a06a2416 | 366 | return le32_to_cpu(rn->footer.flag) & (1 << type); |
39a53e0c JK |
367 | } |
368 | ||
a06a2416 NJ |
369 | #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT) |
370 | #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT) | |
371 | #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT) | |
39a53e0c JK |
372 | |
373 | static inline void set_cold_node(struct inode *inode, struct page *page) | |
374 | { | |
45590710 | 375 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
376 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
377 | ||
378 | if (S_ISDIR(inode->i_mode)) | |
379 | flag &= ~(0x1 << COLD_BIT_SHIFT); | |
380 | else | |
381 | flag |= (0x1 << COLD_BIT_SHIFT); | |
382 | rn->footer.flag = cpu_to_le32(flag); | |
383 | } | |
384 | ||
a06a2416 | 385 | static inline void set_mark(struct page *page, int mark, int type) |
39a53e0c | 386 | { |
45590710 | 387 | struct f2fs_node *rn = F2FS_NODE(page); |
39a53e0c JK |
388 | unsigned int flag = le32_to_cpu(rn->footer.flag); |
389 | if (mark) | |
a06a2416 | 390 | flag |= (0x1 << type); |
39a53e0c | 391 | else |
a06a2416 | 392 | flag &= ~(0x1 << type); |
39a53e0c JK |
393 | rn->footer.flag = cpu_to_le32(flag); |
394 | } | |
a06a2416 NJ |
395 | #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT) |
396 | #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT) |