4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
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)
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)
17 /* # of pages to perform readahead before building free nids */
18 #define FREE_NID_PAGES 4
20 /* maximum readahead size for node during getting data blocks */
21 #define MAX_RA_NODE 128
23 /* control the memory footprint threshold (10MB per 1GB ram) */
24 #define DEF_RAM_THRESHOLD 10
26 /* vector size for gang look-up from nat cache that consists of radix tree */
27 #define NATVEC_SIZE 64
29 /* return value for read_node_page */
33 * For node information
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 */
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? */
50 struct list_head list; /* for clean or dirty nat list */
51 unsigned char flag; /* for node information bits */
52 struct node_info ni; /* in-memory node information */
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)
64 #define inc_node_version(version) (++version)
66 static inline void set_nat_flag(struct nat_entry *ne,
67 unsigned int type, bool set)
69 unsigned char mask = 0x01 << type;
76 static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
78 unsigned char mask = 0x01 << type;
79 return ne->flag & mask;
82 static inline void nat_reset_flag(struct nat_entry *ne)
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);
90 static inline void node_info_from_raw_nat(struct node_info *ni,
91 struct f2fs_nat_entry *raw_ne)
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;
98 static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
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;
107 FREE_NIDS, /* indicates the free nid list */
108 NAT_ENTRIES, /* indicates the cached nat entry */
109 DIRTY_DENTS /* indicates dirty dentry pages */
112 struct nat_entry_set {
113 struct list_head set_list; /* link with other nat sets */
114 struct list_head entry_list; /* link with dirty nat entries */
115 nid_t set; /* set number*/
116 unsigned int entry_cnt; /* the # of nat entries in set */
120 * For free nid mangement
123 NID_NEW, /* newly added to free nid list */
124 NID_ALLOC /* it is allocated */
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 */
133 static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
135 struct f2fs_nm_info *nm_i = NM_I(sbi);
136 struct free_nid *fnid;
138 spin_lock(&nm_i->free_nid_list_lock);
139 if (nm_i->fcnt <= 0) {
140 spin_unlock(&nm_i->free_nid_list_lock);
143 fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
145 spin_unlock(&nm_i->free_nid_list_lock);
152 static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
154 struct f2fs_nm_info *nm_i = NM_I(sbi);
155 memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
158 static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
160 struct f2fs_nm_info *nm_i = NM_I(sbi);
165 block_off = NAT_BLOCK_OFFSET(start);
166 seg_off = block_off >> sbi->log_blocks_per_seg;
168 block_addr = (pgoff_t)(nm_i->nat_blkaddr +
169 (seg_off << sbi->log_blocks_per_seg << 1) +
170 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
172 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
173 block_addr += sbi->blocks_per_seg;
178 static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
181 struct f2fs_nm_info *nm_i = NM_I(sbi);
183 block_addr -= nm_i->nat_blkaddr;
184 if ((block_addr >> sbi->log_blocks_per_seg) % 2)
185 block_addr -= sbi->blocks_per_seg;
187 block_addr += sbi->blocks_per_seg;
189 return block_addr + nm_i->nat_blkaddr;
192 static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
194 unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
196 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
197 f2fs_clear_bit(block_off, nm_i->nat_bitmap);
199 f2fs_set_bit(block_off, nm_i->nat_bitmap);
202 static inline void fill_node_footer(struct page *page, nid_t nid,
203 nid_t ino, unsigned int ofs, bool reset)
205 struct f2fs_node *rn = F2FS_NODE(page);
207 memset(rn, 0, sizeof(*rn));
208 rn->footer.nid = cpu_to_le32(nid);
209 rn->footer.ino = cpu_to_le32(ino);
210 rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
213 static inline void copy_node_footer(struct page *dst, struct page *src)
215 struct f2fs_node *src_rn = F2FS_NODE(src);
216 struct f2fs_node *dst_rn = F2FS_NODE(dst);
217 memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
220 static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
222 struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
223 struct f2fs_node *rn = F2FS_NODE(page);
225 rn->footer.cp_ver = ckpt->checkpoint_ver;
226 rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
229 static inline nid_t ino_of_node(struct page *node_page)
231 struct f2fs_node *rn = F2FS_NODE(node_page);
232 return le32_to_cpu(rn->footer.ino);
235 static inline nid_t nid_of_node(struct page *node_page)
237 struct f2fs_node *rn = F2FS_NODE(node_page);
238 return le32_to_cpu(rn->footer.nid);
241 static inline unsigned int ofs_of_node(struct page *node_page)
243 struct f2fs_node *rn = F2FS_NODE(node_page);
244 unsigned flag = le32_to_cpu(rn->footer.flag);
245 return flag >> OFFSET_BIT_SHIFT;
248 static inline unsigned long long cpver_of_node(struct page *node_page)
250 struct f2fs_node *rn = F2FS_NODE(node_page);
251 return le64_to_cpu(rn->footer.cp_ver);
254 static inline block_t next_blkaddr_of_node(struct page *node_page)
256 struct f2fs_node *rn = F2FS_NODE(node_page);
257 return le32_to_cpu(rn->footer.next_blkaddr);
261 * f2fs assigns the following node offsets described as (num).
267 * |- indirect node (3)
268 * | `- direct node (4 => 4 + N - 1)
269 * |- indirect node (4 + N)
270 * | `- direct node (5 + N => 5 + 2N - 1)
271 * `- double indirect node (5 + 2N)
272 * `- indirect node (6 + 2N)
275 * `- indirect node ((6 + 2N) + x(N + 1))
278 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
281 static inline bool IS_DNODE(struct page *node_page)
283 unsigned int ofs = ofs_of_node(node_page);
285 if (f2fs_has_xattr_block(ofs))
288 if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
289 ofs == 5 + 2 * NIDS_PER_BLOCK)
291 if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
292 ofs -= 6 + 2 * NIDS_PER_BLOCK;
293 if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
299 static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
301 struct f2fs_node *rn = F2FS_NODE(p);
303 f2fs_wait_on_page_writeback(p, NODE);
306 rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
308 rn->in.nid[off] = cpu_to_le32(nid);
312 static inline nid_t get_nid(struct page *p, int off, bool i)
314 struct f2fs_node *rn = F2FS_NODE(p);
317 return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
318 return le32_to_cpu(rn->in.nid[off]);
322 * Coldness identification:
323 * - Mark cold files in f2fs_inode_info
324 * - Mark cold node blocks in their node footer
325 * - Mark cold data pages in page cache
327 static inline int is_file(struct inode *inode, int type)
329 return F2FS_I(inode)->i_advise & type;
332 static inline void set_file(struct inode *inode, int type)
334 F2FS_I(inode)->i_advise |= type;
337 static inline void clear_file(struct inode *inode, int type)
339 F2FS_I(inode)->i_advise &= ~type;
342 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
343 #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
344 #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
345 #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
346 #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
347 #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
349 static inline int is_cold_data(struct page *page)
351 return PageChecked(page);
354 static inline void set_cold_data(struct page *page)
356 SetPageChecked(page);
359 static inline void clear_cold_data(struct page *page)
361 ClearPageChecked(page);
364 static inline int is_node(struct page *page, int type)
366 struct f2fs_node *rn = F2FS_NODE(page);
367 return le32_to_cpu(rn->footer.flag) & (1 << type);
370 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
371 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
372 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
374 static inline void set_cold_node(struct inode *inode, struct page *page)
376 struct f2fs_node *rn = F2FS_NODE(page);
377 unsigned int flag = le32_to_cpu(rn->footer.flag);
379 if (S_ISDIR(inode->i_mode))
380 flag &= ~(0x1 << COLD_BIT_SHIFT);
382 flag |= (0x1 << COLD_BIT_SHIFT);
383 rn->footer.flag = cpu_to_le32(flag);
386 static inline void set_mark(struct page *page, int mark, int type)
388 struct f2fs_node *rn = F2FS_NODE(page);
389 unsigned int flag = le32_to_cpu(rn->footer.flag);
391 flag |= (0x1 << type);
393 flag &= ~(0x1 << type);
394 rn->footer.flag = cpu_to_le32(flag);
396 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
397 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)