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 void 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
);
151 static inline void get_nat_bitmap(struct f2fs_sb_info
*sbi
, void *addr
)
153 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
154 memcpy(addr
, nm_i
->nat_bitmap
, nm_i
->bitmap_size
);
157 static inline pgoff_t
current_nat_addr(struct f2fs_sb_info
*sbi
, nid_t start
)
159 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
164 block_off
= NAT_BLOCK_OFFSET(start
);
165 seg_off
= block_off
>> sbi
->log_blocks_per_seg
;
167 block_addr
= (pgoff_t
)(nm_i
->nat_blkaddr
+
168 (seg_off
<< sbi
->log_blocks_per_seg
<< 1) +
169 (block_off
& ((1 << sbi
->log_blocks_per_seg
) - 1)));
171 if (f2fs_test_bit(block_off
, nm_i
->nat_bitmap
))
172 block_addr
+= sbi
->blocks_per_seg
;
177 static inline pgoff_t
next_nat_addr(struct f2fs_sb_info
*sbi
,
180 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
182 block_addr
-= nm_i
->nat_blkaddr
;
183 if ((block_addr
>> sbi
->log_blocks_per_seg
) % 2)
184 block_addr
-= sbi
->blocks_per_seg
;
186 block_addr
+= sbi
->blocks_per_seg
;
188 return block_addr
+ nm_i
->nat_blkaddr
;
191 static inline void set_to_next_nat(struct f2fs_nm_info
*nm_i
, nid_t start_nid
)
193 unsigned int block_off
= NAT_BLOCK_OFFSET(start_nid
);
195 if (f2fs_test_bit(block_off
, nm_i
->nat_bitmap
))
196 f2fs_clear_bit(block_off
, nm_i
->nat_bitmap
);
198 f2fs_set_bit(block_off
, nm_i
->nat_bitmap
);
201 static inline void fill_node_footer(struct page
*page
, nid_t nid
,
202 nid_t ino
, unsigned int ofs
, bool reset
)
204 struct f2fs_node
*rn
= F2FS_NODE(page
);
206 memset(rn
, 0, sizeof(*rn
));
207 rn
->footer
.nid
= cpu_to_le32(nid
);
208 rn
->footer
.ino
= cpu_to_le32(ino
);
209 rn
->footer
.flag
= cpu_to_le32(ofs
<< OFFSET_BIT_SHIFT
);
212 static inline void copy_node_footer(struct page
*dst
, struct page
*src
)
214 struct f2fs_node
*src_rn
= F2FS_NODE(src
);
215 struct f2fs_node
*dst_rn
= F2FS_NODE(dst
);
216 memcpy(&dst_rn
->footer
, &src_rn
->footer
, sizeof(struct node_footer
));
219 static inline void fill_node_footer_blkaddr(struct page
*page
, block_t blkaddr
)
221 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(F2FS_P_SB(page
));
222 struct f2fs_node
*rn
= F2FS_NODE(page
);
224 rn
->footer
.cp_ver
= ckpt
->checkpoint_ver
;
225 rn
->footer
.next_blkaddr
= cpu_to_le32(blkaddr
);
228 static inline nid_t
ino_of_node(struct page
*node_page
)
230 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
231 return le32_to_cpu(rn
->footer
.ino
);
234 static inline nid_t
nid_of_node(struct page
*node_page
)
236 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
237 return le32_to_cpu(rn
->footer
.nid
);
240 static inline unsigned int ofs_of_node(struct page
*node_page
)
242 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
243 unsigned flag
= le32_to_cpu(rn
->footer
.flag
);
244 return flag
>> OFFSET_BIT_SHIFT
;
247 static inline unsigned long long cpver_of_node(struct page
*node_page
)
249 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
250 return le64_to_cpu(rn
->footer
.cp_ver
);
253 static inline block_t
next_blkaddr_of_node(struct page
*node_page
)
255 struct f2fs_node
*rn
= F2FS_NODE(node_page
);
256 return le32_to_cpu(rn
->footer
.next_blkaddr
);
260 * f2fs assigns the following node offsets described as (num).
266 * |- indirect node (3)
267 * | `- direct node (4 => 4 + N - 1)
268 * |- indirect node (4 + N)
269 * | `- direct node (5 + N => 5 + 2N - 1)
270 * `- double indirect node (5 + 2N)
271 * `- indirect node (6 + 2N)
274 * `- indirect node ((6 + 2N) + x(N + 1))
277 * `- indirect node ((6 + 2N) + (N - 1)(N + 1))
280 static inline bool IS_DNODE(struct page
*node_page
)
282 unsigned int ofs
= ofs_of_node(node_page
);
284 if (f2fs_has_xattr_block(ofs
))
287 if (ofs
== 3 || ofs
== 4 + NIDS_PER_BLOCK
||
288 ofs
== 5 + 2 * NIDS_PER_BLOCK
)
290 if (ofs
>= 6 + 2 * NIDS_PER_BLOCK
) {
291 ofs
-= 6 + 2 * NIDS_PER_BLOCK
;
292 if (!((long int)ofs
% (NIDS_PER_BLOCK
+ 1)))
298 static inline void set_nid(struct page
*p
, int off
, nid_t nid
, bool i
)
300 struct f2fs_node
*rn
= F2FS_NODE(p
);
302 f2fs_wait_on_page_writeback(p
, NODE
);
305 rn
->i
.i_nid
[off
- NODE_DIR1_BLOCK
] = cpu_to_le32(nid
);
307 rn
->in
.nid
[off
] = cpu_to_le32(nid
);
311 static inline nid_t
get_nid(struct page
*p
, int off
, bool i
)
313 struct f2fs_node
*rn
= F2FS_NODE(p
);
316 return le32_to_cpu(rn
->i
.i_nid
[off
- NODE_DIR1_BLOCK
]);
317 return le32_to_cpu(rn
->in
.nid
[off
]);
321 * Coldness identification:
322 * - Mark cold files in f2fs_inode_info
323 * - Mark cold node blocks in their node footer
324 * - Mark cold data pages in page cache
326 static inline int is_file(struct inode
*inode
, int type
)
328 return F2FS_I(inode
)->i_advise
& type
;
331 static inline void set_file(struct inode
*inode
, int type
)
333 F2FS_I(inode
)->i_advise
|= type
;
336 static inline void clear_file(struct inode
*inode
, int type
)
338 F2FS_I(inode
)->i_advise
&= ~type
;
341 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
342 #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
343 #define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
344 #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
345 #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
346 #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
348 static inline int is_cold_data(struct page
*page
)
350 return PageChecked(page
);
353 static inline void set_cold_data(struct page
*page
)
355 SetPageChecked(page
);
358 static inline void clear_cold_data(struct page
*page
)
360 ClearPageChecked(page
);
363 static inline int is_node(struct page
*page
, int type
)
365 struct f2fs_node
*rn
= F2FS_NODE(page
);
366 return le32_to_cpu(rn
->footer
.flag
) & (1 << type
);
369 #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
370 #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
371 #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
373 static inline void set_cold_node(struct inode
*inode
, struct page
*page
)
375 struct f2fs_node
*rn
= F2FS_NODE(page
);
376 unsigned int flag
= le32_to_cpu(rn
->footer
.flag
);
378 if (S_ISDIR(inode
->i_mode
))
379 flag
&= ~(0x1 << COLD_BIT_SHIFT
);
381 flag
|= (0x1 << COLD_BIT_SHIFT
);
382 rn
->footer
.flag
= cpu_to_le32(flag
);
385 static inline void set_mark(struct page
*page
, int mark
, int type
)
387 struct f2fs_node
*rn
= F2FS_NODE(page
);
388 unsigned int flag
= le32_to_cpu(rn
->footer
.flag
);
390 flag
|= (0x1 << type
);
392 flag
&= ~(0x1 << type
);
393 rn
->footer
.flag
= cpu_to_le32(flag
);
395 #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
396 #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)