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 struct list_head list; /* for clean or dirty nat list */
44 bool checkpointed; /* whether it is checkpointed or not */
45 bool fsync_done; /* whether the latest node has fsync mark */
46 struct node_info ni; /* in-memory node information */
49 #define nat_get_nid(nat) (nat->ni.nid)
50 #define nat_set_nid(nat, n) (nat->ni.nid = n)
51 #define nat_get_blkaddr(nat) (nat->ni.blk_addr)
52 #define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
53 #define nat_get_ino(nat) (nat->ni.ino)
54 #define nat_set_ino(nat, i) (nat->ni.ino = i)
55 #define nat_get_version(nat) (nat->ni.version)
56 #define nat_set_version(nat, v) (nat->ni.version = v)
58 #define __set_nat_cache_dirty(nm_i, ne) \
60 ne->checkpointed = false; \
61 list_move_tail(&ne->list, &nm_i->dirty_nat_entries); \
63 #define __clear_nat_cache_dirty(nm_i, ne) \
65 ne->checkpointed = true; \
66 list_move_tail(&ne->list, &nm_i->nat_entries); \
68 #define inc_node_version(version) (++version)
70 static inline void node_info_from_raw_nat(struct node_info *ni,
71 struct f2fs_nat_entry *raw_ne)
73 ni->ino = le32_to_cpu(raw_ne->ino);
74 ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
75 ni->version = raw_ne->version;
78 static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
81 raw_ne->ino = cpu_to_le32(ni->ino);
82 raw_ne->block_addr = cpu_to_le32(ni->blk_addr);
83 raw_ne->version = ni->version;
87 FREE_NIDS, /* indicates the free nid list */
88 NAT_ENTRIES, /* indicates the cached nat entry */
89 DIRTY_DENTS /* indicates dirty dentry pages */
92 struct nat_entry_set {
93 struct list_head set_list; /* link with all nat sets */
94 struct list_head entry_list; /* link with dirty nat entries */
95 nid_t start_nid; /* start nid of nats in set */
96 unsigned int entry_cnt; /* the # of nat entries in set */
100 * For free nid mangement
103 NID_NEW, /* newly added to free nid list */
104 NID_ALLOC /* it is allocated */
108 struct list_head list; /* for free node id list */
109 nid_t nid; /* node id */
110 int state; /* in use or not: NID_NEW or NID_ALLOC */
113 static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
115 struct f2fs_nm_info *nm_i = NM_I(sbi);
116 struct free_nid *fnid;
120 spin_lock(&nm_i->free_nid_list_lock);
121 fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
123 spin_unlock(&nm_i->free_nid_list_lock);
130 static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
132 struct f2fs_nm_info *nm_i = NM_I(sbi);
133 memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
136 static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
138 struct f2fs_nm_info *nm_i = NM_I(sbi);
143 block_off = NAT_BLOCK_OFFSET(start);
144 seg_off = block_off >> sbi->log_blocks_per_seg;
146 block_addr = (pgoff_t)(nm_i->nat_blkaddr +
147 (seg_off << sbi->log_blocks_per_seg << 1) +
148 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
150 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
151 block_addr += sbi->blocks_per_seg;
156 static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
159 struct f2fs_nm_info *nm_i = NM_I(sbi);
161 block_addr -= nm_i->nat_blkaddr;
162 if ((block_addr >> sbi->log_blocks_per_seg) % 2)
163 block_addr -= sbi->blocks_per_seg;
165 block_addr += sbi->blocks_per_seg;
167 return block_addr + nm_i->nat_blkaddr;
170 static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
172 unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
174 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
175 f2fs_clear_bit(block_off, nm_i->nat_bitmap);
177 f2fs_set_bit(block_off, nm_i->nat_bitmap);
180 static inline void fill_node_footer(struct page *page, nid_t nid,
181 nid_t ino, unsigned int ofs, bool reset)
183 struct f2fs_node *rn = F2FS_NODE(page);
185 memset(rn, 0, sizeof(*rn));
186 rn->footer.nid = cpu_to_le32(nid);
187 rn->footer.ino = cpu_to_le32(ino);
188 rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
191 static inline void copy_node_footer(struct page *dst, struct page *src)
193 struct f2fs_node *src_rn = F2FS_NODE(src);
194 struct f2fs_node *dst_rn = F2FS_NODE(dst);
195 memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
198 static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
200 struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
201 struct f2fs_node *rn = F2FS_NODE(page);
203 rn->footer.cp_ver = ckpt->checkpoint_ver;
204 rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
207 static inline nid_t ino_of_node(struct page *node_page)
209 struct f2fs_node *rn = F2FS_NODE(node_page);
210 return le32_to_cpu(rn->footer.ino);
213 static inline nid_t nid_of_node(struct page *node_page)
215 struct f2fs_node *rn = F2FS_NODE(node_page);
216 return le32_to_cpu(rn->footer.nid);
219 static inline unsigned int ofs_of_node(struct page *node_page)
221 struct f2fs_node *rn = F2FS_NODE(node_page);
222 unsigned flag = le32_to_cpu(rn->footer.flag);
223 return flag >> OFFSET_BIT_SHIFT;
226 static inline unsigned long long cpver_of_node(struct page *node_page)
228 struct f2fs_node *rn = F2FS_NODE(node_page);
229 return le64_to_cpu(rn->footer.cp_ver);
232 static inline block_t next_blkaddr_of_node(struct page *node_page)
234 struct f2fs_node *rn = F2FS_NODE(node_page);
235 return le32_to_cpu(rn->footer.next_blkaddr);
239 * f2fs assigns the following node offsets described as (num).
245 * |- indirect node (3)
246 * | `- direct node (4 => 4 + N - 1)
247 * |- indirect node (4 + N)
248 * | `- direct node (5 + N => 5 + 2N - 1)
249 * `- double indirect node (5 + 2N)
250 * `- indirect node (6 + 2N)
253 * `- indirect node ((6 + 2N) + x(N + 1))
256 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
259 static inline bool IS_DNODE(struct page *node_page)
261 unsigned int ofs = ofs_of_node(node_page);
263 if (f2fs_has_xattr_block(ofs))
266 if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
267 ofs == 5 + 2 * NIDS_PER_BLOCK)
269 if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
270 ofs -= 6 + 2 * NIDS_PER_BLOCK;
271 if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
277 static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
279 struct f2fs_node *rn = F2FS_NODE(p);
281 f2fs_wait_on_page_writeback(p, NODE);
284 rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
286 rn->in.nid[off] = cpu_to_le32(nid);
290 static inline nid_t get_nid(struct page *p, int off, bool i)
292 struct f2fs_node *rn = F2FS_NODE(p);
295 return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
296 return le32_to_cpu(rn->in.nid[off]);
300 * Coldness identification:
301 * - Mark cold files in f2fs_inode_info
302 * - Mark cold node blocks in their node footer
303 * - Mark cold data pages in page cache
305 static inline int is_file(struct inode *inode, int type)
307 return F2FS_I(inode)->i_advise & type;
310 static inline void set_file(struct inode *inode, int type)
312 F2FS_I(inode)->i_advise |= type;
315 static inline void clear_file(struct inode *inode, int type)
317 F2FS_I(inode)->i_advise &= ~type;
320 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
321 #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
322 #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
323 #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
324 #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
325 #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
327 static inline int is_cold_data(struct page *page)
329 return PageChecked(page);
332 static inline void set_cold_data(struct page *page)
334 SetPageChecked(page);
337 static inline void clear_cold_data(struct page *page)
339 ClearPageChecked(page);
342 static inline int is_node(struct page *page, int type)
344 struct f2fs_node *rn = F2FS_NODE(page);
345 return le32_to_cpu(rn->footer.flag) & (1 << type);
348 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
349 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
350 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
352 static inline void set_cold_node(struct inode *inode, struct page *page)
354 struct f2fs_node *rn = F2FS_NODE(page);
355 unsigned int flag = le32_to_cpu(rn->footer.flag);
357 if (S_ISDIR(inode->i_mode))
358 flag &= ~(0x1 << COLD_BIT_SHIFT);
360 flag |= (0x1 << COLD_BIT_SHIFT);
361 rn->footer.flag = cpu_to_le32(flag);
364 static inline void set_mark(struct page *page, int mark, int type)
366 struct f2fs_node *rn = F2FS_NODE(page);
367 unsigned int flag = le32_to_cpu(rn->footer.flag);
369 flag |= (0x1 << type);
371 flag &= ~(0x1 << type);
372 rn->footer.flag = cpu_to_le32(flag);
374 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
375 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)