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 */
110 INO_ENTRIES, /* indicates inode entries */
113 struct nat_entry_set {
114 struct list_head set_list; /* link with other nat sets */
115 struct list_head entry_list; /* link with dirty nat entries */
116 nid_t set; /* set number*/
117 unsigned int entry_cnt; /* the # of nat entries in set */
121 * For free nid mangement
124 NID_NEW, /* newly added to free nid list */
125 NID_ALLOC /* it is allocated */
129 struct list_head list; /* for free node id list */
130 nid_t nid; /* node id */
131 int state; /* in use or not: NID_NEW or NID_ALLOC */
134 static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
136 struct f2fs_nm_info *nm_i = NM_I(sbi);
137 struct free_nid *fnid;
139 spin_lock(&nm_i->free_nid_list_lock);
140 if (nm_i->fcnt <= 0) {
141 spin_unlock(&nm_i->free_nid_list_lock);
144 fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
146 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 f2fs_change_bit(block_off, nm_i->nat_bitmap);
199 static inline void fill_node_footer(struct page *page, nid_t nid,
200 nid_t ino, unsigned int ofs, bool reset)
202 struct f2fs_node *rn = F2FS_NODE(page);
204 memset(rn, 0, sizeof(*rn));
205 rn->footer.nid = cpu_to_le32(nid);
206 rn->footer.ino = cpu_to_le32(ino);
207 rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
210 static inline void copy_node_footer(struct page *dst, struct page *src)
212 struct f2fs_node *src_rn = F2FS_NODE(src);
213 struct f2fs_node *dst_rn = F2FS_NODE(dst);
214 memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
217 static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
219 struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
220 struct f2fs_node *rn = F2FS_NODE(page);
222 rn->footer.cp_ver = ckpt->checkpoint_ver;
223 rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
226 static inline nid_t ino_of_node(struct page *node_page)
228 struct f2fs_node *rn = F2FS_NODE(node_page);
229 return le32_to_cpu(rn->footer.ino);
232 static inline nid_t nid_of_node(struct page *node_page)
234 struct f2fs_node *rn = F2FS_NODE(node_page);
235 return le32_to_cpu(rn->footer.nid);
238 static inline unsigned int ofs_of_node(struct page *node_page)
240 struct f2fs_node *rn = F2FS_NODE(node_page);
241 unsigned flag = le32_to_cpu(rn->footer.flag);
242 return flag >> OFFSET_BIT_SHIFT;
245 static inline unsigned long long cpver_of_node(struct page *node_page)
247 struct f2fs_node *rn = F2FS_NODE(node_page);
248 return le64_to_cpu(rn->footer.cp_ver);
251 static inline block_t next_blkaddr_of_node(struct page *node_page)
253 struct f2fs_node *rn = F2FS_NODE(node_page);
254 return le32_to_cpu(rn->footer.next_blkaddr);
258 * f2fs assigns the following node offsets described as (num).
264 * |- indirect node (3)
265 * | `- direct node (4 => 4 + N - 1)
266 * |- indirect node (4 + N)
267 * | `- direct node (5 + N => 5 + 2N - 1)
268 * `- double indirect node (5 + 2N)
269 * `- indirect node (6 + 2N)
272 * `- indirect node ((6 + 2N) + x(N + 1))
275 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
278 static inline bool IS_DNODE(struct page *node_page)
280 unsigned int ofs = ofs_of_node(node_page);
282 if (f2fs_has_xattr_block(ofs))
285 if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
286 ofs == 5 + 2 * NIDS_PER_BLOCK)
288 if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
289 ofs -= 6 + 2 * NIDS_PER_BLOCK;
290 if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
296 static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
298 struct f2fs_node *rn = F2FS_NODE(p);
300 f2fs_wait_on_page_writeback(p, NODE);
303 rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
305 rn->in.nid[off] = cpu_to_le32(nid);
309 static inline nid_t get_nid(struct page *p, int off, bool i)
311 struct f2fs_node *rn = F2FS_NODE(p);
314 return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
315 return le32_to_cpu(rn->in.nid[off]);
319 * Coldness identification:
320 * - Mark cold files in f2fs_inode_info
321 * - Mark cold node blocks in their node footer
322 * - Mark cold data pages in page cache
324 static inline int is_file(struct inode *inode, int type)
326 return F2FS_I(inode)->i_advise & type;
329 static inline void set_file(struct inode *inode, int type)
331 F2FS_I(inode)->i_advise |= type;
334 static inline void clear_file(struct inode *inode, int type)
336 F2FS_I(inode)->i_advise &= ~type;
339 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
340 #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
341 #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
342 #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
343 #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
344 #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
346 static inline int is_cold_data(struct page *page)
348 return PageChecked(page);
351 static inline void set_cold_data(struct page *page)
353 SetPageChecked(page);
356 static inline void clear_cold_data(struct page *page)
358 ClearPageChecked(page);
361 static inline int is_node(struct page *page, int type)
363 struct f2fs_node *rn = F2FS_NODE(page);
364 return le32_to_cpu(rn->footer.flag) & (1 << type);
367 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
368 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
369 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
371 static inline void set_cold_node(struct inode *inode, struct page *page)
373 struct f2fs_node *rn = F2FS_NODE(page);
374 unsigned int flag = le32_to_cpu(rn->footer.flag);
376 if (S_ISDIR(inode->i_mode))
377 flag &= ~(0x1 << COLD_BIT_SHIFT);
379 flag |= (0x1 << COLD_BIT_SHIFT);
380 rn->footer.flag = cpu_to_le32(flag);
383 static inline void set_mark(struct page *page, int mark, int type)
385 struct f2fs_node *rn = F2FS_NODE(page);
386 unsigned int flag = le32_to_cpu(rn->footer.flag);
388 flag |= (0x1 << type);
390 flag &= ~(0x1 << type);
391 rn->footer.flag = cpu_to_le32(flag);
393 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
394 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)