[mirror_ubuntu-bionic-kernel.git] / fs / f2fs / node.h

/*
 * 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 readahead before building free nids */
#define FREE_NID_PAGES 4

/* maximum # of free node ids to produce during build_free_nids */
#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)

/* maximum readahead size for node during getting data blocks */
#define MAX_RA_NODE		128

/* maximum cached nat entries to manage memory footprint */
#define NM_WOUT_THRESHOLD	(64 * NAT_ENTRY_PER_BLOCK)

/* vector size for gang look-up from nat cache that consists of radix tree */
#define NATVEC_SIZE	64

/* return value for read_node_page */
#define LOCKED_PAGE	1

/*
 * 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 */
};

struct nat_entry {
	struct list_head list;	/* for clean or dirty nat list */
	bool checkpointed;	/* whether it is checkpointed or not */
	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 __set_nat_cache_dirty(nm_i, ne)					\
	list_move_tail(&ne->list, &nm_i->dirty_nat_entries);
#define __clear_nat_cache_dirty(nm_i, ne)				\
	list_move_tail(&ne->list, &nm_i->nat_entries);
#define inc_node_version(version)	(++version)

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;
}

/*
 * 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 int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
{
	struct f2fs_nm_info *nm_i = NM_I(sbi);
	struct free_nid *fnid;

	if (nm_i->fcnt <= 0)
		return -1;
	spin_lock(&nm_i->free_nid_list_lock);
	fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
	*nid = fnid->nid;
	spin_unlock(&nm_i->free_nid_list_lock);
	return 0;
}

/*
 * 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 & ((1 << sbi->log_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);

	if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
		f2fs_clear_bit(block_off, nm_i->nat_bitmap);
	else
		f2fs_set_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)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	if (reset)
		memset(rn, 0, sizeof(*rn));
	rn->footer.nid = cpu_to_le32(nid);
	rn->footer.ino = cpu_to_le32(ino);
	rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
}

static inline void copy_node_footer(struct page *dst, struct page *src)
{
	void *src_addr = page_address(src);
	void *dst_addr = page_address(dst);
	struct f2fs_node *src_rn = (struct f2fs_node *)src_addr;
	struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr;
	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_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	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)
{
	void *kaddr = page_address(node_page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	return le32_to_cpu(rn->footer.ino);
}

static inline nid_t nid_of_node(struct page *node_page)
{
	void *kaddr = page_address(node_page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	return le32_to_cpu(rn->footer.nid);
}

static inline unsigned int ofs_of_node(struct page *node_page)
{
	void *kaddr = page_address(node_page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	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)
{
	void *kaddr = page_address(node_page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	return le64_to_cpu(rn->footer.cp_ver);
}

static inline block_t next_blkaddr_of_node(struct page *node_page)
{
	void *kaddr = page_address(node_page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	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 (x(N + 1))
 */
static inline bool IS_DNODE(struct page *node_page)
{
	unsigned int ofs = ofs_of_node(node_page);
	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 = (struct f2fs_node *)page_address(p);

	wait_on_page_writeback(p);

	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 = (struct f2fs_node *)page_address(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_file(struct inode *inode)
{
	return F2FS_I(inode)->i_advise & FADVISE_COLD_BIT;
}

static inline void set_cold_file(struct inode *inode)
{
	F2FS_I(inode)->i_advise |= FADVISE_COLD_BIT;
}

static inline int is_cp_file(struct inode *inode)
{
	return F2FS_I(inode)->i_advise & FADVISE_CP_BIT;
}

static inline void set_cp_file(struct inode *inode)
{
	F2FS_I(inode)->i_advise |= FADVISE_CP_BIT;
}

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_cold_node(struct page *page)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	return flag & (0x1 << COLD_BIT_SHIFT);
}

static inline unsigned char is_fsync_dnode(struct page *page)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	return flag & (0x1 << FSYNC_BIT_SHIFT);
}

static inline unsigned char is_dent_dnode(struct page *page)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	return flag & (0x1 << DENT_BIT_SHIFT);
}

static inline void set_cold_node(struct inode *inode, struct page *page)
{
	struct f2fs_node *rn = (struct f2fs_node *)page_address(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_fsync_mark(struct page *page, int mark)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	if (mark)
		flag |= (0x1 << FSYNC_BIT_SHIFT);
	else
		flag &= ~(0x1 << FSYNC_BIT_SHIFT);
	rn->footer.flag = cpu_to_le32(flag);
}

static inline void set_dentry_mark(struct page *page, int mark)
{
	void *kaddr = page_address(page);
	struct f2fs_node *rn = (struct f2fs_node *)kaddr;
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	if (mark)
		flag |= (0x1 << DENT_BIT_SHIFT);
	else
		flag &= ~(0x1 << DENT_BIT_SHIFT);
	rn->footer.flag = cpu_to_le32(flag);
}
Commit	Line	Data
0a8165d7	1	/*
39a53e0c JK	2	* fs/f2fs/node.h
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	*
	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.
	10	*/
	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)
	13
	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)
	16
	17	/* # of pages to perform readahead before building free nids */
	18	#define FREE_NID_PAGES 4
	19
	20	/* maximum # of free node ids to produce during build_free_nids */
	21	#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
	22
	23	/* maximum readahead size for node during getting data blocks */
	24	#define MAX_RA_NODE 128
	25
	26	/* maximum cached nat entries to manage memory footprint */
	27	#define NM_WOUT_THRESHOLD (64 * NAT_ENTRY_PER_BLOCK)
	28
	29	/* vector size for gang look-up from nat cache that consists of radix tree */
	30	#define NATVEC_SIZE 64
	31
56ae674c JK	32	/* return value for read_node_page */
	33	#define LOCKED_PAGE 1
	34
39a53e0c JK	35	/*
	36	* For node information
	37	*/
	38	struct node_info {
	39	nid_t nid; /* node id */
	40	nid_t ino; /* inode number of the node's owner */
	41	block_t blk_addr; /* block address of the node */
	42	unsigned char version; /* version of the node */
	43	};
	44
	45	struct nat_entry {
	46	struct list_head list; /* for clean or dirty nat list */
	47	bool checkpointed; /* whether it is checkpointed or not */
	48	struct node_info ni; /* in-memory node information */
	49	};
	50
	51	#define nat_get_nid(nat) (nat->ni.nid)
	52	#define nat_set_nid(nat, n) (nat->ni.nid = n)
	53	#define nat_get_blkaddr(nat) (nat->ni.blk_addr)
	54	#define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
	55	#define nat_get_ino(nat) (nat->ni.ino)
	56	#define nat_set_ino(nat, i) (nat->ni.ino = i)
	57	#define nat_get_version(nat) (nat->ni.version)
	58	#define nat_set_version(nat, v) (nat->ni.version = v)
	59
	60	#define __set_nat_cache_dirty(nm_i, ne) \
	61	list_move_tail(&ne->list, &nm_i->dirty_nat_entries);
	62	#define __clear_nat_cache_dirty(nm_i, ne) \
	63	list_move_tail(&ne->list, &nm_i->nat_entries);
	64	#define inc_node_version(version) (++version)
	65
	66	static inline void node_info_from_raw_nat(struct node_info *ni,
	67	struct f2fs_nat_entry *raw_ne)
	68	{
	69	ni->ino = le32_to_cpu(raw_ne->ino);
	70	ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
	71	ni->version = raw_ne->version;
	72	}
	73
	74	/*
	75	* For free nid mangement
	76	*/
	77	enum nid_state {
	78	NID_NEW, /* newly added to free nid list */
	79	NID_ALLOC /* it is allocated */
	80	};
	81
	82	struct free_nid {
	83	struct list_head list; /* for free node id list */
	84	nid_t nid; /* node id */
	85	int state; /* in use or not: NID_NEW or NID_ALLOC */
	86	};
	87
	88	static inline int next_free_nid(struct f2fs_sb_info sbi, nid_t nid)
	89	{
	90	struct f2fs_nm_info *nm_i = NM_I(sbi);
	91	struct free_nid *fnid;
	92
	93	if (nm_i->fcnt <= 0)
	94	return -1;
	95	spin_lock(&nm_i->free_nid_list_lock);
	96	fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
	97	*nid = fnid->nid;
	98	spin_unlock(&nm_i->free_nid_list_lock);
99	return 0;
100	}
101
102	/*
103	* inline functions
104	*/
105	static inline void get_nat_bitmap(struct f2fs_sb_info sbi, void addr)
106	{
107	struct f2fs_nm_info *nm_i = NM_I(sbi);
108	memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
109	}
110
111	static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
112	{
113	struct f2fs_nm_info *nm_i = NM_I(sbi);
114	pgoff_t block_off;
115	pgoff_t block_addr;
116	int seg_off;
117
118	block_off = NAT_BLOCK_OFFSET(start);
119	seg_off = block_off >> sbi->log_blocks_per_seg;
120
121	block_addr = (pgoff_t)(nm_i->nat_blkaddr +
122	(seg_off << sbi->log_blocks_per_seg << 1) +
123	(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
124
125	if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
126	block_addr += sbi->blocks_per_seg;
127
128	return block_addr;
129	}
130
131	static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
132	pgoff_t block_addr)
133	{
134	struct f2fs_nm_info *nm_i = NM_I(sbi);
135
136	block_addr -= nm_i->nat_blkaddr;
137	if ((block_addr >> sbi->log_blocks_per_seg) % 2)
138	block_addr -= sbi->blocks_per_seg;
139	else
140	block_addr += sbi->blocks_per_seg;
141
142	return block_addr + nm_i->nat_blkaddr;
143	}
144
145	static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
146	{
147	unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
148
149	if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
150	f2fs_clear_bit(block_off, nm_i->nat_bitmap);
151	else
152	f2fs_set_bit(block_off, nm_i->nat_bitmap);
153	}
154
155	static inline void fill_node_footer(struct page *page, nid_t nid,
156	nid_t ino, unsigned int ofs, bool reset)
157	{
158	void *kaddr = page_address(page);
159	struct f2fs_node rn = (struct f2fs_node )kaddr;
160	if (reset)
161	memset(rn, 0, sizeof(*rn));
162	rn->footer.nid = cpu_to_le32(nid);
163	rn->footer.ino = cpu_to_le32(ino);
164	rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
165	}
166
167	static inline void copy_node_footer(struct page dst, struct page src)
168	{
169	void *src_addr = page_address(src);
170	void *dst_addr = page_address(dst);
171	struct f2fs_node src_rn = (struct f2fs_node )src_addr;
172	struct f2fs_node dst_rn = (struct f2fs_node )dst_addr;
173	memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
174	}
175
176	static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
177	{
178	struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
179	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
180	void *kaddr = page_address(page);
181	struct f2fs_node rn = (struct f2fs_node )kaddr;
182	rn->footer.cp_ver = ckpt->checkpoint_ver;
25ca923b	183	rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
39a53e0c JK	184	}
	185
	186	static inline nid_t ino_of_node(struct page *node_page)
	187	{
	188	void *kaddr = page_address(node_page);
	189	struct f2fs_node rn = (struct f2fs_node )kaddr;
	190	return le32_to_cpu(rn->footer.ino);
	191	}
	192
	193	static inline nid_t nid_of_node(struct page *node_page)
	194	{
	195	void *kaddr = page_address(node_page);
	196	struct f2fs_node rn = (struct f2fs_node )kaddr;
	197	return le32_to_cpu(rn->footer.nid);
	198	}
	199
	200	static inline unsigned int ofs_of_node(struct page *node_page)
	201	{
	202	void *kaddr = page_address(node_page);
	203	struct f2fs_node rn = (struct f2fs_node )kaddr;
	204	unsigned flag = le32_to_cpu(rn->footer.flag);
	205	return flag >> OFFSET_BIT_SHIFT;
	206	}
	207
	208	static inline unsigned long long cpver_of_node(struct page *node_page)
	209	{
	210	void *kaddr = page_address(node_page);
	211	struct f2fs_node rn = (struct f2fs_node )kaddr;
	212	return le64_to_cpu(rn->footer.cp_ver);
	213	}
	214
	215	static inline block_t next_blkaddr_of_node(struct page *node_page)
	216	{
	217	void *kaddr = page_address(node_page);
	218	struct f2fs_node rn = (struct f2fs_node )kaddr;
	219	return le32_to_cpu(rn->footer.next_blkaddr);
	220	}
	221
	222	/*
	223	* f2fs assigns the following node offsets described as (num).
	224	* N = NIDS_PER_BLOCK
	225	*
	226	* Inode block (0)
	227	* \|- direct node (1)
	228	* \|- direct node (2)
	229	* \|- indirect node (3)
	230	* \| `- direct node (4 => 4 + N - 1)
	231	* \|- indirect node (4 + N)
	232	* \| `- direct node (5 + N => 5 + 2N - 1)
	233	* `- double indirect node (5 + 2N)
	234	* `- indirect node (6 + 2N)
	235	* `- direct node (x(N + 1))
	236	*/
	237	static inline bool IS_DNODE(struct page *node_page)
	238	{
	239	unsigned int ofs = ofs_of_node(node_page);
	240	if (ofs == 3 \|\| ofs == 4 + NIDS_PER_BLOCK \|\|
	241	ofs == 5 + 2 * NIDS_PER_BLOCK)
	242	return false;
	243	if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
	244	ofs -= 6 + 2 * NIDS_PER_BLOCK;
	245	if ((long int)ofs % (NIDS_PER_BLOCK + 1))
	246	return false;
	247	}
248	return true;
249	}
250
251	static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
252	{
253	struct f2fs_node rn = (struct f2fs_node )page_address(p);
254
255	wait_on_page_writeback(p);
256
257	if (i)
258	rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
259	else
260	rn->in.nid[off] = cpu_to_le32(nid);
261	set_page_dirty(p);
262	}
263
264	static inline nid_t get_nid(struct page *p, int off, bool i)
265	{
266	struct f2fs_node rn = (struct f2fs_node )page_address(p);
267	if (i)
268	return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
269	return le32_to_cpu(rn->in.nid[off]);
270	}
271
272	/*
273	* Coldness identification:
274	* - Mark cold files in f2fs_inode_info
275	* - Mark cold node blocks in their node footer
276	* - Mark cold data pages in page cache
277	*/
278	static inline int is_cold_file(struct inode *inode)
279	{
280	return F2FS_I(inode)->i_advise & FADVISE_COLD_BIT;
281	}
282
953a3e27 JK	283	static inline void set_cold_file(struct inode *inode)
	284	{
	285	F2FS_I(inode)->i_advise \|= FADVISE_COLD_BIT;
	286	}
	287
	288	static inline int is_cp_file(struct inode *inode)
	289	{
	290	return F2FS_I(inode)->i_advise & FADVISE_CP_BIT;
	291	}
	292
	293	static inline void set_cp_file(struct inode *inode)
	294	{
	295	F2FS_I(inode)->i_advise \|= FADVISE_CP_BIT;
	296	}
	297
39a53e0c JK	298	static inline int is_cold_data(struct page *page)
	299	{
	300	return PageChecked(page);
	301	}
	302
	303	static inline void set_cold_data(struct page *page)
	304	{
	305	SetPageChecked(page);
	306	}
	307
	308	static inline void clear_cold_data(struct page *page)
	309	{
	310	ClearPageChecked(page);
	311	}
	312
	313	static inline int is_cold_node(struct page *page)
	314	{
	315	void *kaddr = page_address(page);
	316	struct f2fs_node rn = (struct f2fs_node )kaddr;
	317	unsigned int flag = le32_to_cpu(rn->footer.flag);
	318	return flag & (0x1 << COLD_BIT_SHIFT);
	319	}
	320
	321	static inline unsigned char is_fsync_dnode(struct page *page)
	322	{
	323	void *kaddr = page_address(page);
	324	struct f2fs_node rn = (struct f2fs_node )kaddr;
	325	unsigned int flag = le32_to_cpu(rn->footer.flag);
	326	return flag & (0x1 << FSYNC_BIT_SHIFT);
	327	}
	328
	329	static inline unsigned char is_dent_dnode(struct page *page)
	330	{
	331	void *kaddr = page_address(page);
	332	struct f2fs_node rn = (struct f2fs_node )kaddr;
	333	unsigned int flag = le32_to_cpu(rn->footer.flag);
	334	return flag & (0x1 << DENT_BIT_SHIFT);
	335	}
	336
	337	static inline void set_cold_node(struct inode inode, struct page page)
	338	{
	339	struct f2fs_node rn = (struct f2fs_node )page_address(page);
	340	unsigned int flag = le32_to_cpu(rn->footer.flag);
	341
	342	if (S_ISDIR(inode->i_mode))
	343	flag &= ~(0x1 << COLD_BIT_SHIFT);
	344	else
	345	flag \|= (0x1 << COLD_BIT_SHIFT);
	346	rn->footer.flag = cpu_to_le32(flag);
	347	}
	348
	349	static inline void set_fsync_mark(struct page *page, int mark)
	350	{
	351	void *kaddr = page_address(page);
	352	struct f2fs_node rn = (struct f2fs_node )kaddr;
	353	unsigned int flag = le32_to_cpu(rn->footer.flag);
	354	if (mark)
	355	flag \|= (0x1 << FSYNC_BIT_SHIFT);
	356	else
	357	flag &= ~(0x1 << FSYNC_BIT_SHIFT);
	358	rn->footer.flag = cpu_to_le32(flag);
	359	}
	360
	361	static inline void set_dentry_mark(struct page *page, int mark)
362	{
363	void *kaddr = page_address(page);
364	struct f2fs_node rn = (struct f2fs_node )kaddr;
365	unsigned int flag = le32_to_cpu(rn->footer.flag);
366	if (mark)
367	flag \|= (0x1 << DENT_BIT_SHIFT);
368	else
369	flag &= ~(0x1 << DENT_BIT_SHIFT);
370	rn->footer.flag = cpu_to_le32(flag);
371	}