673ce926cf0903580e340e506a5158ee429e561a
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 synchronous readahead before building free nids */
18 #define FREE_NID_PAGES 4
20 #define DEF_RA_NID_PAGES 4 /* # of nid pages to be readaheaded */
22 /* maximum readahead size for node during getting data blocks */
23 #define MAX_RA_NODE 128
25 /* control the memory footprint threshold (10MB per 1GB ram) */
26 #define DEF_RAM_THRESHOLD 1
28 /* control dirty nats ratio threshold (default: 10% over max nid count) */
29 #define DEF_DIRTY_NAT_RATIO_THRESHOLD 10
30 /* control total # of nats */
31 #define DEF_NAT_CACHE_THRESHOLD 100000
33 /* vector size for gang look-up from nat cache that consists of radix tree */
34 #define NATVEC_SIZE 64
35 #define SETVEC_SIZE 32
37 /* return value for read_node_page */
40 /* For flag in struct node_info */
42 IS_CHECKPOINTED
, /* is it checkpointed before? */
43 HAS_FSYNCED_INODE
, /* is the inode fsynced before? */
44 HAS_LAST_FSYNC
, /* has the latest node fsync mark? */
45 IS_DIRTY
, /* this nat entry is dirty? */
49 * For node information
52 nid_t nid
; /* node id */
53 nid_t ino
; /* inode number of the node's owner */
54 block_t blk_addr
; /* block address of the node */
55 unsigned char version
; /* version of the node */
56 unsigned char flag
; /* for node information bits */
60 struct list_head list
; /* for clean or dirty nat list */
61 struct node_info ni
; /* in-memory node information */
64 #define nat_get_nid(nat) (nat->ni.nid)
65 #define nat_set_nid(nat, n) (nat->ni.nid = n)
66 #define nat_get_blkaddr(nat) (nat->ni.blk_addr)
67 #define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
68 #define nat_get_ino(nat) (nat->ni.ino)
69 #define nat_set_ino(nat, i) (nat->ni.ino = i)
70 #define nat_get_version(nat) (nat->ni.version)
71 #define nat_set_version(nat, v) (nat->ni.version = v)
73 #define inc_node_version(version) (++version)
75 static inline void copy_node_info(struct node_info
*dst
,
76 struct node_info
*src
)
80 dst
->blk_addr
= src
->blk_addr
;
81 dst
->version
= src
->version
;
82 /* should not copy flag here */
85 static inline void set_nat_flag(struct nat_entry
*ne
,
86 unsigned int type
, bool set
)
88 unsigned char mask
= 0x01 << type
;
95 static inline bool get_nat_flag(struct nat_entry
*ne
, unsigned int type
)
97 unsigned char mask
= 0x01 << type
;
98 return ne
->ni
.flag
& mask
;
101 static inline void nat_reset_flag(struct nat_entry
*ne
)
103 /* these states can be set only after checkpoint was done */
104 set_nat_flag(ne
, IS_CHECKPOINTED
, true);
105 set_nat_flag(ne
, HAS_FSYNCED_INODE
, false);
106 set_nat_flag(ne
, HAS_LAST_FSYNC
, true);
109 static inline void node_info_from_raw_nat(struct node_info
*ni
,
110 struct f2fs_nat_entry
*raw_ne
)
112 ni
->ino
= le32_to_cpu(raw_ne
->ino
);
113 ni
->blk_addr
= le32_to_cpu(raw_ne
->block_addr
);
114 ni
->version
= raw_ne
->version
;
117 static inline void raw_nat_from_node_info(struct f2fs_nat_entry
*raw_ne
,
118 struct node_info
*ni
)
120 raw_ne
->ino
= cpu_to_le32(ni
->ino
);
121 raw_ne
->block_addr
= cpu_to_le32(ni
->blk_addr
);
122 raw_ne
->version
= ni
->version
;
125 static inline bool excess_dirty_nats(struct f2fs_sb_info
*sbi
)
127 return NM_I(sbi
)->dirty_nat_cnt
>= NM_I(sbi
)->max_nid
*
128 NM_I(sbi
)->dirty_nats_ratio
/ 100;
131 static inline bool excess_cached_nats(struct f2fs_sb_info
*sbi
)
133 return NM_I(sbi
)->nat_cnt
>= DEF_NAT_CACHE_THRESHOLD
;
137 FREE_NIDS
, /* indicates the free nid list */
138 NAT_ENTRIES
, /* indicates the cached nat entry */
139 DIRTY_DENTS
, /* indicates dirty dentry pages */
140 INO_ENTRIES
, /* indicates inode entries */
141 EXTENT_CACHE
, /* indicates extent cache */
142 BASE_CHECK
, /* check kernel status */
145 struct nat_entry_set
{
146 struct list_head set_list
; /* link with other nat sets */
147 struct list_head entry_list
; /* link with dirty nat entries */
148 nid_t set
; /* set number*/
149 unsigned int entry_cnt
; /* the # of nat entries in set */
153 * For free nid mangement
156 NID_NEW
, /* newly added to free nid list */
157 NID_ALLOC
/* it is allocated */
161 struct list_head list
; /* for free node id list */
162 nid_t nid
; /* node id */
163 int state
; /* in use or not: NID_NEW or NID_ALLOC */
166 static inline void next_free_nid(struct f2fs_sb_info
*sbi
, nid_t
*nid
)
168 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
169 struct free_nid
*fnid
;
171 spin_lock(&nm_i
->free_nid_list_lock
);
172 if (nm_i
->fcnt
<= 0) {
173 spin_unlock(&nm_i
->free_nid_list_lock
);
176 fnid
= list_entry(nm_i
->free_nid_list
.next
, struct free_nid
, list
);
178 spin_unlock(&nm_i
->free_nid_list_lock
);
184 static inline void get_nat_bitmap(struct f2fs_sb_info
*sbi
, void *addr
)
186 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
187 memcpy(addr
, nm_i
->nat_bitmap
, nm_i
->bitmap_size
);
190 static inline pgoff_t
current_nat_addr(struct f2fs_sb_info
*sbi
, nid_t start
)
192 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
197 block_off
= NAT_BLOCK_OFFSET(start
);
198 seg_off
= block_off
>> sbi
->log_blocks_per_seg
;
200 block_addr
= (pgoff_t
)(nm_i
->nat_blkaddr
+
201 (seg_off
<< sbi
->log_blocks_per_seg
<< 1) +
202 (block_off
& (sbi
->blocks_per_seg
- 1)));
204 if (f2fs_test_bit(block_off
, nm_i
->nat_bitmap
))
205 block_addr
+= sbi
->blocks_per_seg
;
210 static inline pgoff_t
next_nat_addr(struct f2fs_sb_info
*sbi
,
213 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
215 block_addr
-= nm_i
->nat_blkaddr
;
216 if ((block_addr
>> sbi
->log_blocks_per_seg
) % 2)
217 block_addr
-= sbi
->blocks_per_seg
;
219 block_addr
+= sbi
->blocks_per_seg
;
221 return block_addr
+ nm_i
->nat_blkaddr
;
224 static inline void set_to_next_nat(struct f2fs_nm_info
*nm_i
, nid_t start_nid
)
226 unsigned int block_off
= NAT_BLOCK_OFFSET(start_nid
);
228 f2fs_change_bit(block_off
, nm_i
->nat_bitmap
);
231 static inline void fill_node_footer(struct page
*page
, nid_t nid
,
232 nid_t ino
, unsigned int ofs
, bool reset
)
234 struct f2fs_node
*rn
= F2FS_NODE(page
);
235 unsigned int old_flag
= 0;
238 memset(rn
, 0, sizeof(*rn
));
240 old_flag
= le32_to_cpu(rn
->footer
.flag
);
242 rn
->footer
.nid
= cpu_to_le32(nid
);
243 rn
->footer
.ino
= cpu_to_le32(ino
);
245 /* should remain old flag bits such as COLD_BIT_SHIFT */
246 rn
->footer
.flag
= cpu_to_le32((ofs
<< OFFSET_BIT_SHIFT
) |
247 (old_flag
& OFFSET_BIT_MASK
));
250 static inline void copy_node_footer(struct page
*dst
, struct page
*src
)
252 struct f2fs_node
*src_rn
= F2FS_NODE(src
);
253 struct f2fs_node
*dst_rn
= F2FS_NODE(dst
);
254 memcpy(&dst_rn
->footer
, &src_rn
->footer
, sizeof(struct node_footer
));
257 static inline void fill_node_footer_blkaddr(struct page
*page
, block_t blkaddr
)
259 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(F2FS_P_SB(page
));
260 struct f2fs_node
*rn
= F2FS_NODE(page
);
262 rn
->footer
.cp_ver
= ckpt
->checkpoint_ver
;
263 rn
->footer
.next_blkaddr
= cpu_to_le32(blkaddr
);
266 static inline nid_t
ino_of_node(struct page
*node_page
)
268 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
269 return le32_to_cpu(rn
->footer
.ino
);
272 static inline nid_t
nid_of_node(struct page
*node_page
)
274 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
275 return le32_to_cpu(rn
->footer
.nid
);
278 static inline unsigned int ofs_of_node(struct page
*node_page
)
280 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
281 unsigned flag
= le32_to_cpu(rn
->footer
.flag
);
282 return flag
>> OFFSET_BIT_SHIFT
;
285 static inline unsigned long long cpver_of_node(struct page
*node_page
)
287 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
288 return le64_to_cpu(rn
->footer
.cp_ver
);
291 static inline block_t
next_blkaddr_of_node(struct page
*node_page
)
293 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
294 return le32_to_cpu(rn
->footer
.next_blkaddr
);
298 * f2fs assigns the following node offsets described as (num).
304 * |- indirect node (3)
305 * | `- direct node (4 => 4 + N - 1)
306 * |- indirect node (4 + N)
307 * | `- direct node (5 + N => 5 + 2N - 1)
308 * `- double indirect node (5 + 2N)
309 * `- indirect node (6 + 2N)
312 * `- indirect node ((6 + 2N) + x(N + 1))
315 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
318 static inline bool IS_DNODE(struct page
*node_page
)
320 unsigned int ofs
= ofs_of_node(node_page
);
322 if (f2fs_has_xattr_block(ofs
))
325 if (ofs
== 3 || ofs
== 4 + NIDS_PER_BLOCK
||
326 ofs
== 5 + 2 * NIDS_PER_BLOCK
)
328 if (ofs
>= 6 + 2 * NIDS_PER_BLOCK
) {
329 ofs
-= 6 + 2 * NIDS_PER_BLOCK
;
330 if (!((long int)ofs
% (NIDS_PER_BLOCK
+ 1)))
336 static inline int set_nid(struct page
*p
, int off
, nid_t nid
, bool i
)
338 struct f2fs_node
*rn
= F2FS_NODE(p
);
340 f2fs_wait_on_page_writeback(p
, NODE
, true);
343 rn
->i
.i_nid
[off
- NODE_DIR1_BLOCK
] = cpu_to_le32(nid
);
345 rn
->in
.nid
[off
] = cpu_to_le32(nid
);
346 return set_page_dirty(p
);
349 static inline nid_t
get_nid(struct page
*p
, int off
, bool i
)
351 struct f2fs_node
*rn
= F2FS_NODE(p
);
354 return le32_to_cpu(rn
->i
.i_nid
[off
- NODE_DIR1_BLOCK
]);
355 return le32_to_cpu(rn
->in
.nid
[off
]);
359 * Coldness identification:
360 * - Mark cold files in f2fs_inode_info
361 * - Mark cold node blocks in their node footer
362 * - Mark cold data pages in page cache
364 static inline int is_cold_data(struct page
*page
)
366 return PageChecked(page
);
369 static inline void set_cold_data(struct page
*page
)
371 SetPageChecked(page
);
374 static inline void clear_cold_data(struct page
*page
)
376 ClearPageChecked(page
);
379 static inline int is_node(struct page
*page
, int type
)
381 struct f2fs_node
*rn
= F2FS_NODE(page
);
382 return le32_to_cpu(rn
->footer
.flag
) & (1 << type
);
385 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
386 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
387 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
389 static inline int is_inline_node(struct page
*page
)
391 return PageChecked(page
);
394 static inline void set_inline_node(struct page
*page
)
396 SetPageChecked(page
);
399 static inline void clear_inline_node(struct page
*page
)
401 ClearPageChecked(page
);
404 static inline void set_cold_node(struct inode
*inode
, struct page
*page
)
406 struct f2fs_node
*rn
= F2FS_NODE(page
);
407 unsigned int flag
= le32_to_cpu(rn
->footer
.flag
);
409 if (S_ISDIR(inode
->i_mode
))
410 flag
&= ~(0x1 << COLD_BIT_SHIFT
);
412 flag
|= (0x1 << COLD_BIT_SHIFT
);
413 rn
->footer
.flag
= cpu_to_le32(flag
);
416 static inline void set_mark(struct page
*page
, int mark
, int type
)
418 struct f2fs_node
*rn
= F2FS_NODE(page
);
419 unsigned int flag
= le32_to_cpu(rn
->footer
.flag
);
421 flag
|= (0x1 << type
);
423 flag
&= ~(0x1 << type
);
424 rn
->footer
.flag
= cpu_to_le32(flag
);
426 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
427 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)
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