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 */
32 /* For flag in struct node_info */
34 IS_CHECKPOINTED, /* is it checkpointed before? */
35 HAS_FSYNCED_INODE, /* is the inode fsynced before? */
36 HAS_LAST_FSYNC, /* has the latest node fsync mark? */
37 IS_DIRTY, /* this nat entry is dirty? */
41 * For node information
44 nid_t nid; /* node id */
45 nid_t ino; /* inode number of the node's owner */
46 block_t blk_addr; /* block address of the node */
47 unsigned char version; /* version of the node */
48 unsigned char flag; /* for node information bits */
52 struct list_head list; /* for clean or dirty nat list */
53 struct node_info ni; /* in-memory node information */
56 #define nat_get_nid(nat) (nat->ni.nid)
57 #define nat_set_nid(nat, n) (nat->ni.nid = n)
58 #define nat_get_blkaddr(nat) (nat->ni.blk_addr)
59 #define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
60 #define nat_get_ino(nat) (nat->ni.ino)
61 #define nat_set_ino(nat, i) (nat->ni.ino = i)
62 #define nat_get_version(nat) (nat->ni.version)
63 #define nat_set_version(nat, v) (nat->ni.version = v)
65 #define inc_node_version(version) (++version)
67 static inline void copy_node_info(struct node_info *dst,
68 struct node_info *src)
72 dst->blk_addr = src->blk_addr;
73 dst->version = src->version;
74 /* should not copy flag here */
77 static inline void set_nat_flag(struct nat_entry *ne,
78 unsigned int type, bool set)
80 unsigned char mask = 0x01 << type;
87 static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
89 unsigned char mask = 0x01 << type;
90 return ne->ni.flag & mask;
93 static inline void nat_reset_flag(struct nat_entry *ne)
95 /* these states can be set only after checkpoint was done */
96 set_nat_flag(ne, IS_CHECKPOINTED, true);
97 set_nat_flag(ne, HAS_FSYNCED_INODE, false);
98 set_nat_flag(ne, HAS_LAST_FSYNC, true);
101 static inline void node_info_from_raw_nat(struct node_info *ni,
102 struct f2fs_nat_entry *raw_ne)
104 ni->ino = le32_to_cpu(raw_ne->ino);
105 ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
106 ni->version = raw_ne->version;
109 static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
110 struct node_info *ni)
112 raw_ne->ino = cpu_to_le32(ni->ino);
113 raw_ne->block_addr = cpu_to_le32(ni->blk_addr);
114 raw_ne->version = ni->version;
118 FREE_NIDS, /* indicates the free nid list */
119 NAT_ENTRIES, /* indicates the cached nat entry */
120 DIRTY_DENTS, /* indicates dirty dentry pages */
121 INO_ENTRIES, /* indicates inode entries */
122 BASE_CHECK, /* check kernel status */
125 struct nat_entry_set {
126 struct list_head set_list; /* link with other nat sets */
127 struct list_head entry_list; /* link with dirty nat entries */
128 nid_t set; /* set number*/
129 unsigned int entry_cnt; /* the # of nat entries in set */
133 * For free nid mangement
136 NID_NEW, /* newly added to free nid list */
137 NID_ALLOC /* it is allocated */
141 struct list_head list; /* for free node id list */
142 nid_t nid; /* node id */
143 int state; /* in use or not: NID_NEW or NID_ALLOC */
146 static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
148 struct f2fs_nm_info *nm_i = NM_I(sbi);
149 struct free_nid *fnid;
151 spin_lock(&nm_i->free_nid_list_lock);
152 if (nm_i->fcnt <= 0) {
153 spin_unlock(&nm_i->free_nid_list_lock);
156 fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
158 spin_unlock(&nm_i->free_nid_list_lock);
164 static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
166 struct f2fs_nm_info *nm_i = NM_I(sbi);
167 memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
170 static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
172 struct f2fs_nm_info *nm_i = NM_I(sbi);
177 block_off = NAT_BLOCK_OFFSET(start);
178 seg_off = block_off >> sbi->log_blocks_per_seg;
180 block_addr = (pgoff_t)(nm_i->nat_blkaddr +
181 (seg_off << sbi->log_blocks_per_seg << 1) +
182 (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
184 if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
185 block_addr += sbi->blocks_per_seg;
190 static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
193 struct f2fs_nm_info *nm_i = NM_I(sbi);
195 block_addr -= nm_i->nat_blkaddr;
196 if ((block_addr >> sbi->log_blocks_per_seg) % 2)
197 block_addr -= sbi->blocks_per_seg;
199 block_addr += sbi->blocks_per_seg;
201 return block_addr + nm_i->nat_blkaddr;
204 static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
206 unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
208 f2fs_change_bit(block_off, nm_i->nat_bitmap);
211 static inline void fill_node_footer(struct page *page, nid_t nid,
212 nid_t ino, unsigned int ofs, bool reset)
214 struct f2fs_node *rn = F2FS_NODE(page);
216 memset(rn, 0, sizeof(*rn));
217 rn->footer.nid = cpu_to_le32(nid);
218 rn->footer.ino = cpu_to_le32(ino);
219 rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
222 static inline void copy_node_footer(struct page *dst, struct page *src)
224 struct f2fs_node *src_rn = F2FS_NODE(src);
225 struct f2fs_node *dst_rn = F2FS_NODE(dst);
226 memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
229 static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
231 struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
232 struct f2fs_node *rn = F2FS_NODE(page);
234 rn->footer.cp_ver = ckpt->checkpoint_ver;
235 rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
238 static inline nid_t ino_of_node(struct page *node_page)
240 struct f2fs_node *rn = F2FS_NODE(node_page);
241 return le32_to_cpu(rn->footer.ino);
244 static inline nid_t nid_of_node(struct page *node_page)
246 struct f2fs_node *rn = F2FS_NODE(node_page);
247 return le32_to_cpu(rn->footer.nid);
250 static inline unsigned int ofs_of_node(struct page *node_page)
252 struct f2fs_node *rn = F2FS_NODE(node_page);
253 unsigned flag = le32_to_cpu(rn->footer.flag);
254 return flag >> OFFSET_BIT_SHIFT;
257 static inline unsigned long long cpver_of_node(struct page *node_page)
259 struct f2fs_node *rn = F2FS_NODE(node_page);
260 return le64_to_cpu(rn->footer.cp_ver);
263 static inline block_t next_blkaddr_of_node(struct page *node_page)
265 struct f2fs_node *rn = F2FS_NODE(node_page);
266 return le32_to_cpu(rn->footer.next_blkaddr);
270 * f2fs assigns the following node offsets described as (num).
276 * |- indirect node (3)
277 * | `- direct node (4 => 4 + N - 1)
278 * |- indirect node (4 + N)
279 * | `- direct node (5 + N => 5 + 2N - 1)
280 * `- double indirect node (5 + 2N)
281 * `- indirect node (6 + 2N)
284 * `- indirect node ((6 + 2N) + x(N + 1))
287 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
290 static inline bool IS_DNODE(struct page *node_page)
292 unsigned int ofs = ofs_of_node(node_page);
294 if (f2fs_has_xattr_block(ofs))
297 if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
298 ofs == 5 + 2 * NIDS_PER_BLOCK)
300 if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
301 ofs -= 6 + 2 * NIDS_PER_BLOCK;
302 if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
308 static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
310 struct f2fs_node *rn = F2FS_NODE(p);
312 f2fs_wait_on_page_writeback(p, NODE);
315 rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
317 rn->in.nid[off] = cpu_to_le32(nid);
321 static inline nid_t get_nid(struct page *p, int off, bool i)
323 struct f2fs_node *rn = F2FS_NODE(p);
326 return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
327 return le32_to_cpu(rn->in.nid[off]);
331 * Coldness identification:
332 * - Mark cold files in f2fs_inode_info
333 * - Mark cold node blocks in their node footer
334 * - Mark cold data pages in page cache
336 static inline int is_file(struct inode *inode, int type)
338 return F2FS_I(inode)->i_advise & type;
341 static inline void set_file(struct inode *inode, int type)
343 F2FS_I(inode)->i_advise |= type;
346 static inline void clear_file(struct inode *inode, int type)
348 F2FS_I(inode)->i_advise &= ~type;
351 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
352 #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
353 #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
354 #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
355 #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
356 #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
358 static inline int is_cold_data(struct page *page)
360 return PageChecked(page);
363 static inline void set_cold_data(struct page *page)
365 SetPageChecked(page);
368 static inline void clear_cold_data(struct page *page)
370 ClearPageChecked(page);
373 static inline int is_node(struct page *page, int type)
375 struct f2fs_node *rn = F2FS_NODE(page);
376 return le32_to_cpu(rn->footer.flag) & (1 << type);
379 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
380 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
381 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
383 static inline void set_cold_node(struct inode *inode, struct page *page)
385 struct f2fs_node *rn = F2FS_NODE(page);
386 unsigned int flag = le32_to_cpu(rn->footer.flag);
388 if (S_ISDIR(inode->i_mode))
389 flag &= ~(0x1 << COLD_BIT_SHIFT);
391 flag |= (0x1 << COLD_BIT_SHIFT);
392 rn->footer.flag = cpu_to_le32(flag);
395 static inline void set_mark(struct page *page, int mark, int type)
397 struct f2fs_node *rn = F2FS_NODE(page);
398 unsigned int flag = le32_to_cpu(rn->footer.flag);
400 flag |= (0x1 << type);
402 flag &= ~(0x1 << type);
403 rn->footer.flag = cpu_to_le32(flag);
405 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
406 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)