Skip to content
Navigation Menu
Toggle navigation
Sign in
In this repository
All GitHub Enterprise
↵
Jump to
↵
No suggested jump to results
In this repository
All GitHub Enterprise
↵
Jump to
↵
In this organization
All GitHub Enterprise
↵
Jump to
↵
In this repository
All GitHub Enterprise
↵
Jump to
↵
Sign in
Reseting focus
You signed in with another tab or window.
Reload
to refresh your session.
You signed out in another tab or window.
Reload
to refresh your session.
You switched accounts on another tab or window.
Reload
to refresh your session.
Dismiss alert
{{ message }}
mariux64
/
linux
Public
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Issues
2
Pull requests
0
Actions
Projects
0
Wiki
Security
Insights
Additional navigation options
Code
Issues
Pull requests
Actions
Projects
Wiki
Security
Insights
Files
3519e3f
Documentation
arch
block
certs
crypto
drivers
firmware
fs
9p
adfs
affs
afs
autofs4
befs
bfs
btrfs
cachefiles
ceph
cifs
coda
configfs
cramfs
debugfs
devpts
dlm
ecryptfs
efivarfs
efs
exofs
exportfs
ext2
ext4
f2fs
Kconfig
Makefile
acl.c
acl.h
checkpoint.c
crypto.c
crypto_fname.c
crypto_key.c
crypto_policy.c
data.c
debug.c
dir.c
extent_cache.c
f2fs.h
f2fs_crypto.h
file.c
gc.c
gc.h
hash.c
inline.c
inode.c
namei.c
node.c
node.h
recovery.c
segment.c
segment.h
shrinker.c
super.c
trace.c
trace.h
xattr.c
xattr.h
fat
freevxfs
fscache
fuse
gfs2
hfs
hfsplus
hostfs
hpfs
hugetlbfs
isofs
jbd2
jffs2
jfs
kernfs
lockd
logfs
minix
ncpfs
nfs
nfs_common
nfsd
nilfs2
nls
notify
ntfs
ocfs2
omfs
openpromfs
overlayfs
proc
pstore
qnx4
qnx6
quota
ramfs
reiserfs
romfs
squashfs
sysfs
sysv
tracefs
ubifs
udf
ufs
xfs
Kconfig
Kconfig.binfmt
Makefile
aio.c
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf.c
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
block_dev.c
buffer.c
char_dev.c
compat.c
compat_binfmt_elf.c
compat_ioctl.c
coredump.c
dax.c
dcache.c
dcookies.c
direct-io.c
drop_caches.c
eventfd.c
eventpoll.c
exec.c
fcntl.c
fhandle.c
file.c
file_table.c
filesystems.c
fs-writeback.c
fs_pin.c
fs_struct.c
inode.c
internal.h
ioctl.c
libfs.c
locks.c
mbcache.c
mount.h
mpage.c
namei.c
namespace.c
no-block.c
nsfs.c
open.c
pipe.c
pnode.c
pnode.h
posix_acl.c
proc_namespace.c
read_write.c
readdir.c
select.c
seq_file.c
signalfd.c
splice.c
stack.c
stat.c
statfs.c
super.c
sync.c
timerfd.c
userfaultfd.c
utimes.c
xattr.c
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.get_maintainer.ignore
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README
REPORTING-BUGS
Breadcrumbs
linux
/
fs
/
f2fs
/
node.h
Blame
Blame
Latest commit
History
History
396 lines (333 loc) · 10.6 KB
Breadcrumbs
linux
/
fs
/
f2fs
/
node.h
Top
File metadata and controls
Code
Blame
396 lines (333 loc) · 10.6 KB
Raw
/* * fs/f2fs/node.h * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /* start node id of a node block dedicated to the given node id */ #define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK) /* node block offset on the NAT area dedicated to the given start node id */ #define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK) /* # of pages to perform synchronous readahead before building free nids */ #define FREE_NID_PAGES 4 #define DEF_RA_NID_PAGES 4 /* # of nid pages to be readaheaded */ /* maximum readahead size for node during getting data blocks */ #define MAX_RA_NODE 128 /* control the memory footprint threshold (10MB per 1GB ram) */ #define DEF_RAM_THRESHOLD 10 /* vector size for gang look-up from nat cache that consists of radix tree */ #define NATVEC_SIZE 64 #define SETVEC_SIZE 32 /* return value for read_node_page */ #define LOCKED_PAGE 1 /* For flag in struct node_info */ enum { IS_CHECKPOINTED, /* is it checkpointed before? */ HAS_FSYNCED_INODE, /* is the inode fsynced before? */ HAS_LAST_FSYNC, /* has the latest node fsync mark? */ IS_DIRTY, /* this nat entry is dirty? */ }; /* * For node information */ struct node_info { nid_t nid; /* node id */ nid_t ino; /* inode number of the node's owner */ block_t blk_addr; /* block address of the node */ unsigned char version; /* version of the node */ unsigned char flag; /* for node information bits */ }; struct nat_entry { struct list_head list; /* for clean or dirty nat list */ struct node_info ni; /* in-memory node information */ }; #define nat_get_nid(nat) (nat->ni.nid) #define nat_set_nid(nat, n) (nat->ni.nid = n) #define nat_get_blkaddr(nat) (nat->ni.blk_addr) #define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b) #define nat_get_ino(nat) (nat->ni.ino) #define nat_set_ino(nat, i) (nat->ni.ino = i) #define nat_get_version(nat) (nat->ni.version) #define nat_set_version(nat, v) (nat->ni.version = v) #define inc_node_version(version) (++version) static inline void copy_node_info(struct node_info *dst, struct node_info *src) { dst->nid = src->nid; dst->ino = src->ino; dst->blk_addr = src->blk_addr; dst->version = src->version; /* should not copy flag here */ } static inline void set_nat_flag(struct nat_entry *ne, unsigned int type, bool set) { unsigned char mask = 0x01 << type; if (set) ne->ni.flag |= mask; else ne->ni.flag &= ~mask; } static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type) { unsigned char mask = 0x01 << type; return ne->ni.flag & mask; } static inline void nat_reset_flag(struct nat_entry *ne) { /* these states can be set only after checkpoint was done */ set_nat_flag(ne, IS_CHECKPOINTED, true); set_nat_flag(ne, HAS_FSYNCED_INODE, false); set_nat_flag(ne, HAS_LAST_FSYNC, true); } static inline void node_info_from_raw_nat(struct node_info *ni, struct f2fs_nat_entry *raw_ne) { ni->ino = le32_to_cpu(raw_ne->ino); ni->blk_addr = le32_to_cpu(raw_ne->block_addr); ni->version = raw_ne->version; } static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, struct node_info *ni) { raw_ne->ino = cpu_to_le32(ni->ino); raw_ne->block_addr = cpu_to_le32(ni->blk_addr); raw_ne->version = ni->version; } enum mem_type { FREE_NIDS, /* indicates the free nid list */ NAT_ENTRIES, /* indicates the cached nat entry */ DIRTY_DENTS, /* indicates dirty dentry pages */ INO_ENTRIES, /* indicates inode entries */ EXTENT_CACHE, /* indicates extent cache */ BASE_CHECK, /* check kernel status */ }; struct nat_entry_set { struct list_head set_list; /* link with other nat sets */ struct list_head entry_list; /* link with dirty nat entries */ nid_t set; /* set number*/ unsigned int entry_cnt; /* the # of nat entries in set */ }; /* * For free nid mangement */ enum nid_state { NID_NEW, /* newly added to free nid list */ NID_ALLOC /* it is allocated */ }; struct free_nid { struct list_head list; /* for free node id list */ nid_t nid; /* node id */ int state; /* in use or not: NID_NEW or NID_ALLOC */ }; static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) { struct f2fs_nm_info *nm_i = NM_I(sbi); struct free_nid *fnid; spin_lock(&nm_i->free_nid_list_lock); if (nm_i->fcnt <= 0) { spin_unlock(&nm_i->free_nid_list_lock); return; } fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list); *nid = fnid->nid; spin_unlock(&nm_i->free_nid_list_lock); } /* * inline functions */ static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) { struct f2fs_nm_info *nm_i = NM_I(sbi); memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size); } static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) { struct f2fs_nm_info *nm_i = NM_I(sbi); pgoff_t block_off; pgoff_t block_addr; int seg_off; block_off = NAT_BLOCK_OFFSET(start); seg_off = block_off >> sbi->log_blocks_per_seg; block_addr = (pgoff_t)(nm_i->nat_blkaddr + (seg_off << sbi->log_blocks_per_seg << 1) + (block_off & (sbi->blocks_per_seg - 1))); if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) block_addr += sbi->blocks_per_seg; return block_addr; } static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, pgoff_t block_addr) { struct f2fs_nm_info *nm_i = NM_I(sbi); block_addr -= nm_i->nat_blkaddr; if ((block_addr >> sbi->log_blocks_per_seg) % 2) block_addr -= sbi->blocks_per_seg; else block_addr += sbi->blocks_per_seg; return block_addr + nm_i->nat_blkaddr; } static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) { unsigned int block_off = NAT_BLOCK_OFFSET(start_nid); f2fs_change_bit(block_off, nm_i->nat_bitmap); } static inline void fill_node_footer(struct page *page, nid_t nid, nid_t ino, unsigned int ofs, bool reset) { struct f2fs_node *rn = F2FS_NODE(page); unsigned int old_flag = 0; if (reset) memset(rn, 0, sizeof(*rn)); else old_flag = le32_to_cpu(rn->footer.flag); rn->footer.nid = cpu_to_le32(nid); rn->footer.ino = cpu_to_le32(ino); /* should remain old flag bits such as COLD_BIT_SHIFT */ rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) | (old_flag & OFFSET_BIT_MASK)); } static inline void copy_node_footer(struct page *dst, struct page *src) { struct f2fs_node *src_rn = F2FS_NODE(src); struct f2fs_node *dst_rn = F2FS_NODE(dst); memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); } static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) { struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page)); struct f2fs_node *rn = F2FS_NODE(page); rn->footer.cp_ver = ckpt->checkpoint_ver; rn->footer.next_blkaddr = cpu_to_le32(blkaddr); } static inline nid_t ino_of_node(struct page *node_page) { struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.ino); } static inline nid_t nid_of_node(struct page *node_page) { struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.nid); } static inline unsigned int ofs_of_node(struct page *node_page) { struct f2fs_node *rn = F2FS_NODE(node_page); unsigned flag = le32_to_cpu(rn->footer.flag); return flag >> OFFSET_BIT_SHIFT; } static inline unsigned long long cpver_of_node(struct page *node_page) { struct f2fs_node *rn = F2FS_NODE(node_page); return le64_to_cpu(rn->footer.cp_ver); } static inline block_t next_blkaddr_of_node(struct page *node_page) { struct f2fs_node *rn = F2FS_NODE(node_page); return le32_to_cpu(rn->footer.next_blkaddr); } /* * f2fs assigns the following node offsets described as (num). * N = NIDS_PER_BLOCK * * Inode block (0) * |- direct node (1) * |- direct node (2) * |- indirect node (3) * | `- direct node (4 => 4 + N - 1) * |- indirect node (4 + N) * | `- direct node (5 + N => 5 + 2N - 1) * `- double indirect node (5 + 2N) * `- indirect node (6 + 2N) * `- direct node * ...... * `- indirect node ((6 + 2N) + x(N + 1)) * `- direct node * ...... * `- indirect node ((6 + 2N) + (N - 1)(N + 1)) * `- direct node */ static inline bool IS_DNODE(struct page *node_page) { unsigned int ofs = ofs_of_node(node_page); if (f2fs_has_xattr_block(ofs)) return false; if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || ofs == 5 + 2 * NIDS_PER_BLOCK) return false; if (ofs >= 6 + 2 * NIDS_PER_BLOCK) { ofs -= 6 + 2 * NIDS_PER_BLOCK; if (!((long int)ofs % (NIDS_PER_BLOCK + 1))) return false; } return true; } static inline void set_nid(struct page *p, int off, nid_t nid, bool i) { struct f2fs_node *rn = F2FS_NODE(p); f2fs_wait_on_page_writeback(p, NODE); if (i) rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid); else rn->in.nid[off] = cpu_to_le32(nid); set_page_dirty(p); } static inline nid_t get_nid(struct page *p, int off, bool i) { struct f2fs_node *rn = F2FS_NODE(p); if (i) return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); return le32_to_cpu(rn->in.nid[off]); } /* * Coldness identification: * - Mark cold files in f2fs_inode_info * - Mark cold node blocks in their node footer * - Mark cold data pages in page cache */ static inline int is_cold_data(struct page *page) { return PageChecked(page); } static inline void set_cold_data(struct page *page) { SetPageChecked(page); } static inline void clear_cold_data(struct page *page) { ClearPageChecked(page); } static inline int is_node(struct page *page, int type) { struct f2fs_node *rn = F2FS_NODE(page); return le32_to_cpu(rn->footer.flag) & (1 << type); } #define is_cold_node(page) is_node(page, COLD_BIT_SHIFT) #define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT) #define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT) static inline void set_cold_node(struct inode *inode, struct page *page) { struct f2fs_node *rn = F2FS_NODE(page); unsigned int flag = le32_to_cpu(rn->footer.flag); if (S_ISDIR(inode->i_mode)) flag &= ~(0x1 << COLD_BIT_SHIFT); else flag |= (0x1 << COLD_BIT_SHIFT); rn->footer.flag = cpu_to_le32(flag); } static inline void set_mark(struct page *page, int mark, int type) { struct f2fs_node *rn = F2FS_NODE(page); unsigned int flag = le32_to_cpu(rn->footer.flag); if (mark) flag |= (0x1 << type); else flag &= ~(0x1 << type); rn->footer.flag = cpu_to_le32(flag); } #define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT) #define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
You can’t perform that action at this time.