[deliverable/linux.git] / fs / f2fs / inode.c

/*
 * fs/f2fs/inode.c
 *
 * 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.
 */
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>

#include "f2fs.h"
#include "node.h"

#include <trace/events/f2fs.h>

void f2fs_set_inode_flags(struct inode *inode)
{
	unsigned int flags = F2FS_I(inode)->i_flags;
	unsigned int new_fl = 0;

	if (flags & FS_SYNC_FL)
		new_fl |= S_SYNC;
	if (flags & FS_APPEND_FL)
		new_fl |= S_APPEND;
	if (flags & FS_IMMUTABLE_FL)
		new_fl |= S_IMMUTABLE;
	if (flags & FS_NOATIME_FL)
		new_fl |= S_NOATIME;
	if (flags & FS_DIRSYNC_FL)
		new_fl |= S_DIRSYNC;
	inode_set_flags(inode, new_fl,
			S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
}

static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
{
	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
			S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
		if (ri->i_addr[0])
			inode->i_rdev =
				old_decode_dev(le32_to_cpu(ri->i_addr[0]));
		else
			inode->i_rdev =
				new_decode_dev(le32_to_cpu(ri->i_addr[1]));
	}
}

static bool __written_first_block(struct f2fs_inode *ri)
{
	block_t addr = le32_to_cpu(ri->i_addr[0]);

	if (addr != NEW_ADDR && addr != NULL_ADDR)
		return true;
	return false;
}

static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
{
	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
		if (old_valid_dev(inode->i_rdev)) {
			ri->i_addr[0] =
				cpu_to_le32(old_encode_dev(inode->i_rdev));
			ri->i_addr[1] = 0;
		} else {
			ri->i_addr[0] = 0;
			ri->i_addr[1] =
				cpu_to_le32(new_encode_dev(inode->i_rdev));
			ri->i_addr[2] = 0;
		}
	}
}

static void __recover_inline_status(struct inode *inode, struct page *ipage)
{
	void *inline_data = inline_data_addr(ipage);
	__le32 *start = inline_data;
	__le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);

	while (start < end) {
		if (*start++) {
			f2fs_wait_on_page_writeback(ipage, NODE, true);

			set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
			set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage));
			set_page_dirty(ipage);
			return;
		}
	}
	return;
}

static int do_read_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	struct page *node_page;
	struct f2fs_inode *ri;

	/* Check if ino is within scope */
	if (check_nid_range(sbi, inode->i_ino)) {
		f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
			 (unsigned long) inode->i_ino);
		WARN_ON(1);
		return -EINVAL;
	}

	node_page = get_node_page(sbi, inode->i_ino);
	if (IS_ERR(node_page))
		return PTR_ERR(node_page);

	ri = F2FS_INODE(node_page);

	inode->i_mode = le16_to_cpu(ri->i_mode);
	i_uid_write(inode, le32_to_cpu(ri->i_uid));
	i_gid_write(inode, le32_to_cpu(ri->i_gid));
	set_nlink(inode, le32_to_cpu(ri->i_links));
	inode->i_size = le64_to_cpu(ri->i_size);
	inode->i_blocks = le64_to_cpu(ri->i_blocks);

	inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
	inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
	inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
	inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
	inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
	inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
	inode->i_generation = le32_to_cpu(ri->i_generation);

	fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
	fi->i_flags = le32_to_cpu(ri->i_flags);
	fi->flags = 0;
	fi->i_advise = ri->i_advise;
	fi->i_pino = le32_to_cpu(ri->i_pino);
	fi->i_dir_level = ri->i_dir_level;

	if (f2fs_init_extent_tree(inode, &ri->i_ext))
		set_page_dirty(node_page);

	get_inline_info(fi, ri);

	/* check data exist */
	if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
		__recover_inline_status(inode, node_page);

	/* get rdev by using inline_info */
	__get_inode_rdev(inode, ri);

	if (__written_first_block(ri))
		set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);

	f2fs_put_page(node_page, 1);

	stat_inc_inline_xattr(inode);
	stat_inc_inline_inode(inode);
	stat_inc_inline_dir(inode);

	return 0;
}

struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
{
	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	struct inode *inode;
	int ret = 0;

	inode = iget_locked(sb, ino);
	if (!inode)
		return ERR_PTR(-ENOMEM);

	if (!(inode->i_state & I_NEW)) {
		trace_f2fs_iget(inode);
		return inode;
	}
	if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
		goto make_now;

	ret = do_read_inode(inode);
	if (ret)
		goto bad_inode;
make_now:
	if (ino == F2FS_NODE_INO(sbi)) {
		inode->i_mapping->a_ops = &f2fs_node_aops;
		mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	} else if (ino == F2FS_META_INO(sbi)) {
		inode->i_mapping->a_ops = &f2fs_meta_aops;
		mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	} else if (S_ISREG(inode->i_mode)) {
		inode->i_op = &f2fs_file_inode_operations;
		inode->i_fop = &f2fs_file_operations;
		inode->i_mapping->a_ops = &f2fs_dblock_aops;
	} else if (S_ISDIR(inode->i_mode)) {
		inode->i_op = &f2fs_dir_inode_operations;
		inode->i_fop = &f2fs_dir_operations;
		inode->i_mapping->a_ops = &f2fs_dblock_aops;
		mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
	} else if (S_ISLNK(inode->i_mode)) {
		if (f2fs_encrypted_inode(inode))
			inode->i_op = &f2fs_encrypted_symlink_inode_operations;
		else
			inode->i_op = &f2fs_symlink_inode_operations;
		inode_nohighmem(inode);
		inode->i_mapping->a_ops = &f2fs_dblock_aops;
	} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
			S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
		inode->i_op = &f2fs_special_inode_operations;
		init_special_inode(inode, inode->i_mode, inode->i_rdev);
	} else {
		ret = -EIO;
		goto bad_inode;
	}
	unlock_new_inode(inode);
	trace_f2fs_iget(inode);
	return inode;

bad_inode:
	iget_failed(inode);
	trace_f2fs_iget_exit(inode, ret);
	return ERR_PTR(ret);
}

int update_inode(struct inode *inode, struct page *node_page)
{
	struct f2fs_inode *ri;

	f2fs_wait_on_page_writeback(node_page, NODE, true);

	ri = F2FS_INODE(node_page);

	ri->i_mode = cpu_to_le16(inode->i_mode);
	ri->i_advise = F2FS_I(inode)->i_advise;
	ri->i_uid = cpu_to_le32(i_uid_read(inode));
	ri->i_gid = cpu_to_le32(i_gid_read(inode));
	ri->i_links = cpu_to_le32(inode->i_nlink);
	ri->i_size = cpu_to_le64(i_size_read(inode));
	ri->i_blocks = cpu_to_le64(inode->i_blocks);

	if (F2FS_I(inode)->extent_tree)
		set_raw_extent(&F2FS_I(inode)->extent_tree->largest,
							&ri->i_ext);
	else
		memset(&ri->i_ext, 0, sizeof(ri->i_ext));
	set_raw_inline(F2FS_I(inode), ri);

	ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
	ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
	ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
	ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
	ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
	ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
	ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
	ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
	ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
	ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
	ri->i_generation = cpu_to_le32(inode->i_generation);
	ri->i_dir_level = F2FS_I(inode)->i_dir_level;

	__set_inode_rdev(inode, ri);
	set_cold_node(inode, node_page);
	clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);

	/* deleted inode */
	if (inode->i_nlink == 0)
		clear_inline_node(node_page);

	return set_page_dirty(node_page);
}

int update_inode_page(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct page *node_page;
	int ret = 0;
retry:
	node_page = get_node_page(sbi, inode->i_ino);
	if (IS_ERR(node_page)) {
		int err = PTR_ERR(node_page);
		if (err == -ENOMEM) {
			cond_resched();
			goto retry;
		} else if (err != -ENOENT) {
			f2fs_stop_checkpoint(sbi, false);
		}
		return 0;
	}
	ret = update_inode(inode, node_page);
	f2fs_put_page(node_page, 1);
	return ret;
}

int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	if (inode->i_ino == F2FS_NODE_INO(sbi) ||
			inode->i_ino == F2FS_META_INO(sbi))
		return 0;

	if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
		return 0;

	/*
	 * We need to balance fs here to prevent from producing dirty node pages
	 * during the urgent cleaning time when runing out of free sections.
	 */
	if (update_inode_page(inode))
		f2fs_balance_fs(sbi, true);
	return 0;
}

/*
 * Called at the last iput() if i_nlink is zero
 */
void f2fs_evict_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	nid_t xnid = fi->i_xattr_nid;
	int err = 0;

	/* some remained atomic pages should discarded */
	if (f2fs_is_atomic_file(inode))
		drop_inmem_pages(inode);

	trace_f2fs_evict_inode(inode);
	truncate_inode_pages_final(&inode->i_data);

	if (inode->i_ino == F2FS_NODE_INO(sbi) ||
			inode->i_ino == F2FS_META_INO(sbi))
		goto out_clear;

	f2fs_bug_on(sbi, get_dirty_pages(inode));
	remove_dirty_inode(inode);

	f2fs_destroy_extent_tree(inode);

	if (inode->i_nlink || is_bad_inode(inode))
		goto no_delete;

	sb_start_intwrite(inode->i_sb);
	set_inode_flag(fi, FI_NO_ALLOC);
	i_size_write(inode, 0);
retry:
	if (F2FS_HAS_BLOCKS(inode))
		err = f2fs_truncate(inode, true);

	if (!err) {
		f2fs_lock_op(sbi);
		err = remove_inode_page(inode);
		f2fs_unlock_op(sbi);
	}

	/* give more chances, if ENOMEM case */
	if (err == -ENOMEM) {
		err = 0;
		goto retry;
	}

	sb_end_intwrite(inode->i_sb);
no_delete:
	stat_dec_inline_xattr(inode);
	stat_dec_inline_dir(inode);
	stat_dec_inline_inode(inode);

	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
	if (xnid)
		invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
	if (is_inode_flag_set(fi, FI_APPEND_WRITE))
		add_ino_entry(sbi, inode->i_ino, APPEND_INO);
	if (is_inode_flag_set(fi, FI_UPDATE_WRITE))
		add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
	if (is_inode_flag_set(fi, FI_FREE_NID)) {
		alloc_nid_failed(sbi, inode->i_ino);
		clear_inode_flag(fi, FI_FREE_NID);
	}
	f2fs_bug_on(sbi, err &&
		!exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
out_clear:
	fscrypt_put_encryption_info(inode, NULL);
	clear_inode(inode);
}

/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct node_info ni;

	/* don't make bad inode, since it becomes a regular file. */
	unlock_new_inode(inode);

	/*
	 * Note: we should add inode to orphan list before f2fs_unlock_op()
	 * so we can prevent losing this orphan when encoutering checkpoint
	 * and following suddenly power-off.
	 */
	get_node_info(sbi, inode->i_ino, &ni);

	if (ni.blk_addr != NULL_ADDR) {
		int err = acquire_orphan_inode(sbi);
		if (err) {
			set_sbi_flag(sbi, SBI_NEED_FSCK);
			f2fs_msg(sbi->sb, KERN_WARNING,
				"Too many orphan inodes, run fsck to fix.");
		} else {
			add_orphan_inode(sbi, inode->i_ino);
		}
		alloc_nid_done(sbi, inode->i_ino);
	} else {
		set_inode_flag(F2FS_I(inode), FI_FREE_NID);
	}

	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}
Commit	Line	Data
0a8165d7	1	/*
19f99cee JK	2	* fs/f2fs/inode.c
	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	#include <linux/fs.h>
	12	#include <linux/f2fs_fs.h>
	13	#include <linux/buffer_head.h>
	14	#include <linux/writeback.h>
	15
	16	#include "f2fs.h"
	17	#include "node.h"
	18
a2a4a7e4 NJ	19	#include <trace/events/f2fs.h>
a2a4a7e4 NJ	20
19f99cee JK	21	void f2fs_set_inode_flags(struct inode *inode)
	22	{
	23	unsigned int flags = F2FS_I(inode)->i_flags;
8abfb36a	24	unsigned int new_fl = 0;
19f99cee JK	25
19f99cee JK	26	if (flags & FS_SYNC_FL)
8abfb36a	27	new_fl \|= S_SYNC;
19f99cee	28	if (flags & FS_APPEND_FL)
8abfb36a	29	new_fl \|= S_APPEND;
19f99cee	30	if (flags & FS_IMMUTABLE_FL)
8abfb36a	31	new_fl \|= S_IMMUTABLE;
19f99cee	32	if (flags & FS_NOATIME_FL)
8abfb36a	33	new_fl \|= S_NOATIME;
19f99cee	34	if (flags & FS_DIRSYNC_FL)
8abfb36a	35	new_fl \|= S_DIRSYNC;
6a678857 ZZ	36	inode_set_flags(inode, new_fl,
6a678857 ZZ	37	S_SYNC\|S_APPEND\|S_IMMUTABLE\|S_NOATIME\|S_DIRSYNC);
19f99cee JK	38	}
19f99cee JK	39
3d1e3807 JK	40	static void __get_inode_rdev(struct inode inode, struct f2fs_inode ri)
	41	{
	42	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode) \|\|
	43	S_ISFIFO(inode->i_mode) \|\| S_ISSOCK(inode->i_mode)) {
	44	if (ri->i_addr[0])
6c311ec6 CF	45	inode->i_rdev =
6c311ec6 CF	46	old_decode_dev(le32_to_cpu(ri->i_addr[0]));
3d1e3807	47	else
6c311ec6 CF	48	inode->i_rdev =
6c311ec6 CF	49	new_decode_dev(le32_to_cpu(ri->i_addr[1]));
3d1e3807 JK	50	}
	51	}
	52
3c6c2beb JK	53	static bool __written_first_block(struct f2fs_inode *ri)
3c6c2beb JK	54	{
adad81ed JK	55	block_t addr = le32_to_cpu(ri->i_addr[0]);
	56
	57	if (addr != NEW_ADDR && addr != NULL_ADDR)
3c6c2beb JK	58	return true;
	59	return false;
	60	}
	61
3d1e3807 JK	62	static void __set_inode_rdev(struct inode inode, struct f2fs_inode ri)
	63	{
	64	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode)) {
	65	if (old_valid_dev(inode->i_rdev)) {
6c311ec6 CF	66	ri->i_addr[0] =
6c311ec6 CF	67	cpu_to_le32(old_encode_dev(inode->i_rdev));
3d1e3807 JK	68	ri->i_addr[1] = 0;
	69	} else {
	70	ri->i_addr[0] = 0;
6c311ec6 CF	71	ri->i_addr[1] =
6c311ec6 CF	72	cpu_to_le32(new_encode_dev(inode->i_rdev));
3d1e3807 JK	73	ri->i_addr[2] = 0;
	74	}
	75	}
	76	}
	77
9e5ba77f	78	static void __recover_inline_status(struct inode inode, struct page ipage)
b3d208f9 JK	79	{
b3d208f9 JK	80	void *inline_data = inline_data_addr(ipage);
9e5ba77f CY	81	__le32 *start = inline_data;
9e5ba77f CY	82	__le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);
b3d208f9	83
9e5ba77f CY	84	while (start < end) {
9e5ba77f CY	85	if (*start++) {
fec1d657	86	f2fs_wait_on_page_writeback(ipage, NODE, true);
b3d208f9	87
9e5ba77f CY	88	set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
	89	set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage));
	90	set_page_dirty(ipage);
	91	return;
	92	}
b3d208f9	93	}
9e5ba77f	94	return;
b3d208f9 JK	95	}
b3d208f9 JK	96
19f99cee JK	97	static int do_read_inode(struct inode *inode)
19f99cee JK	98	{
4081363f	99	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
19f99cee JK	100	struct f2fs_inode_info *fi = F2FS_I(inode);
19f99cee JK	101	struct page *node_page;
19f99cee JK	102	struct f2fs_inode *ri;
	103
	104	/* Check if ino is within scope */
064e0823 NJ	105	if (check_nid_range(sbi, inode->i_ino)) {
	106	f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
	107	(unsigned long) inode->i_ino);
d6b7d4b3	108	WARN_ON(1);
064e0823 NJ	109	return -EINVAL;
064e0823 NJ	110	}
19f99cee JK	111
	112	node_page = get_node_page(sbi, inode->i_ino);
	113	if (IS_ERR(node_page))
	114	return PTR_ERR(node_page);
	115
58bfaf44	116	ri = F2FS_INODE(node_page);
19f99cee JK	117
	118	inode->i_mode = le16_to_cpu(ri->i_mode);
	119	i_uid_write(inode, le32_to_cpu(ri->i_uid));
	120	i_gid_write(inode, le32_to_cpu(ri->i_gid));
	121	set_nlink(inode, le32_to_cpu(ri->i_links));
	122	inode->i_size = le64_to_cpu(ri->i_size);
	123	inode->i_blocks = le64_to_cpu(ri->i_blocks);
	124
	125	inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
	126	inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
	127	inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
	128	inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
	129	inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
	130	inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
	131	inode->i_generation = le32_to_cpu(ri->i_generation);
	132
	133	fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
	134	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
	135	fi->i_flags = le32_to_cpu(ri->i_flags);
	136	fi->flags = 0;
19f99cee	137	fi->i_advise = ri->i_advise;
6666e6aa	138	fi->i_pino = le32_to_cpu(ri->i_pino);
38431545	139	fi->i_dir_level = ri->i_dir_level;
3d1e3807	140
ed3d1256 JK	141	if (f2fs_init_extent_tree(inode, &ri->i_ext))
ed3d1256 JK	142	set_page_dirty(node_page);
0c872e2d	143
444c580f	144	get_inline_info(fi, ri);
3d1e3807	145
b3d208f9 JK	146	/* check data exist */
b3d208f9 JK	147	if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
9e5ba77f	148	__recover_inline_status(inode, node_page);
b3d208f9	149
3d1e3807 JK	150	/* get rdev by using inline_info */
	151	__get_inode_rdev(inode, ri);
	152
3c6c2beb JK	153	if (__written_first_block(ri))
	154	set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
	155
19f99cee	156	f2fs_put_page(node_page, 1);
9d1015dd	157
d5e8f6c9	158	stat_inc_inline_xattr(inode);
9d1015dd JK	159	stat_inc_inline_inode(inode);
	160	stat_inc_inline_dir(inode);
	161
9e5ba77f	162	return 0;
19f99cee JK	163	}
	164
	165	struct inode f2fs_iget(struct super_block sb, unsigned long ino)
	166	{
	167	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	168	struct inode *inode;
a2a4a7e4	169	int ret = 0;
19f99cee JK	170
	171	inode = iget_locked(sb, ino);
	172	if (!inode)
	173	return ERR_PTR(-ENOMEM);
a2a4a7e4 NJ	174
	175	if (!(inode->i_state & I_NEW)) {
	176	trace_f2fs_iget(inode);
19f99cee	177	return inode;
a2a4a7e4	178	}
19f99cee JK	179	if (ino == F2FS_NODE_INO(sbi) \|\| ino == F2FS_META_INO(sbi))
	180	goto make_now;
	181
	182	ret = do_read_inode(inode);
	183	if (ret)
	184	goto bad_inode;
19f99cee JK	185	make_now:
	186	if (ino == F2FS_NODE_INO(sbi)) {
	187	inode->i_mapping->a_ops = &f2fs_node_aops;
	188	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	189	} else if (ino == F2FS_META_INO(sbi)) {
	190	inode->i_mapping->a_ops = &f2fs_meta_aops;
	191	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	192	} else if (S_ISREG(inode->i_mode)) {
	193	inode->i_op = &f2fs_file_inode_operations;
	194	inode->i_fop = &f2fs_file_operations;
	195	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	196	} else if (S_ISDIR(inode->i_mode)) {
	197	inode->i_op = &f2fs_dir_inode_operations;
	198	inode->i_fop = &f2fs_dir_operations;
	199	inode->i_mapping->a_ops = &f2fs_dblock_aops;
a78186eb	200	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
19f99cee	201	} else if (S_ISLNK(inode->i_mode)) {
cbaf042a JK	202	if (f2fs_encrypted_inode(inode))
	203	inode->i_op = &f2fs_encrypted_symlink_inode_operations;
	204	else
	205	inode->i_op = &f2fs_symlink_inode_operations;
21fc61c7	206	inode_nohighmem(inode);
19f99cee JK	207	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	208	} else if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode) \|\|
	209	S_ISFIFO(inode->i_mode) \|\| S_ISSOCK(inode->i_mode)) {
	210	inode->i_op = &f2fs_special_inode_operations;
	211	init_special_inode(inode, inode->i_mode, inode->i_rdev);
	212	} else {
	213	ret = -EIO;
	214	goto bad_inode;
	215	}
	216	unlock_new_inode(inode);
a2a4a7e4	217	trace_f2fs_iget(inode);
19f99cee JK	218	return inode;
	219
	220	bad_inode:
	221	iget_failed(inode);
a2a4a7e4	222	trace_f2fs_iget_exit(inode, ret);
19f99cee JK	223	return ERR_PTR(ret);
	224	}
	225
12719ae1	226	int update_inode(struct inode inode, struct page node_page)
19f99cee	227	{
19f99cee JK	228	struct f2fs_inode *ri;
19f99cee JK	229
fec1d657	230	f2fs_wait_on_page_writeback(node_page, NODE, true);
19f99cee	231
58bfaf44	232	ri = F2FS_INODE(node_page);
19f99cee JK	233
	234	ri->i_mode = cpu_to_le16(inode->i_mode);
	235	ri->i_advise = F2FS_I(inode)->i_advise;
	236	ri->i_uid = cpu_to_le32(i_uid_read(inode));
	237	ri->i_gid = cpu_to_le32(i_gid_read(inode));
	238	ri->i_links = cpu_to_le32(inode->i_nlink);
	239	ri->i_size = cpu_to_le64(i_size_read(inode));
	240	ri->i_blocks = cpu_to_le64(inode->i_blocks);
0c872e2d	241
3e72f721 JK	242	if (F2FS_I(inode)->extent_tree)
	243	set_raw_extent(&F2FS_I(inode)->extent_tree->largest,
	244	&ri->i_ext);
	245	else
	246	memset(&ri->i_ext, 0, sizeof(ri->i_ext));
444c580f	247	set_raw_inline(F2FS_I(inode), ri);
19f99cee JK	248
	249	ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
	250	ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
	251	ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
	252	ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
	253	ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
	254	ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
	255	ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
	256	ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
	257	ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
6666e6aa	258	ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
19f99cee	259	ri->i_generation = cpu_to_le32(inode->i_generation);
38431545	260	ri->i_dir_level = F2FS_I(inode)->i_dir_level;
7d79e75f	261
3d1e3807	262	__set_inode_rdev(inode, ri);
398b1ac5	263	set_cold_node(inode, node_page);
b3783873	264	clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
12719ae1	265
2049d4fc JK	266	/* deleted inode */
	267	if (inode->i_nlink == 0)
	268	clear_inline_node(node_page);
	269
12719ae1	270	return set_page_dirty(node_page);
19f99cee JK	271	}
19f99cee JK	272
12719ae1	273	int update_inode_page(struct inode *inode)
19f99cee	274	{
4081363f	275	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
19f99cee	276	struct page *node_page;
12719ae1	277	int ret = 0;
744602cf	278	retry:
19f99cee	279	node_page = get_node_page(sbi, inode->i_ino);
744602cf JK	280	if (IS_ERR(node_page)) {
	281	int err = PTR_ERR(node_page);
	282	if (err == -ENOMEM) {
	283	cond_resched();
	284	goto retry;
	285	} else if (err != -ENOENT) {
38f91ca8	286	f2fs_stop_checkpoint(sbi, false);
744602cf	287	}
12719ae1	288	return 0;
744602cf	289	}
12719ae1	290	ret = update_inode(inode, node_page);
19f99cee	291	f2fs_put_page(node_page, 1);
12719ae1	292	return ret;
19f99cee JK	293	}
19f99cee JK	294
39936837 JK	295	int f2fs_write_inode(struct inode inode, struct writeback_control wbc)
39936837 JK	296	{
4081363f	297	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
39936837 JK	298
	299	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	300	inode->i_ino == F2FS_META_INO(sbi))
	301	return 0;
	302
b3783873 JK	303	if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
	304	return 0;
	305
39936837	306	/*
c5cd29d2	307	* We need to balance fs here to prevent from producing dirty node pages
39936837 JK	308	* during the urgent cleaning time when runing out of free sections.
39936837 JK	309	*/
12719ae1	310	if (update_inode_page(inode))
2c4db1a6	311	f2fs_balance_fs(sbi, true);
744602cf	312	return 0;
39936837 JK	313	}
39936837 JK	314
0a8165d7	315	/*
19f99cee JK	316	* Called at the last iput() if i_nlink is zero
	317	*/
	318	void f2fs_evict_inode(struct inode *inode)
	319	{
4081363f	320	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
c9b63bd0 JK	321	struct f2fs_inode_info *fi = F2FS_I(inode);
c9b63bd0 JK	322	nid_t xnid = fi->i_xattr_nid;
13ec7297	323	int err = 0;
19f99cee	324
88b88a66	325	/* some remained atomic pages should discarded */
1e84371f	326	if (f2fs_is_atomic_file(inode))
29b96b54	327	drop_inmem_pages(inode);
88b88a66	328
a2a4a7e4	329	trace_f2fs_evict_inode(inode);
91b0abe3	330	truncate_inode_pages_final(&inode->i_data);
19f99cee JK	331
	332	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	333	inode->i_ino == F2FS_META_INO(sbi))
dbf20cb2	334	goto out_clear;
19f99cee	335
a7ffdbe2	336	f2fs_bug_on(sbi, get_dirty_pages(inode));
c227f912	337	remove_dirty_inode(inode);
19f99cee	338
3e72f721 JK	339	f2fs_destroy_extent_tree(inode);
3e72f721 JK	340
19f99cee JK	341	if (inode->i_nlink \|\| is_bad_inode(inode))
	342	goto no_delete;
	343
d6212a5f	344	sb_start_intwrite(inode->i_sb);
c9b63bd0	345	set_inode_flag(fi, FI_NO_ALLOC);
19f99cee	346	i_size_write(inode, 0);
4c0c2949	347	retry:
19f99cee	348	if (F2FS_HAS_BLOCKS(inode))
13ec7297	349	err = f2fs_truncate(inode, true);
19f99cee	350
13ec7297 CY	351	if (!err) {
	352	f2fs_lock_op(sbi);
	353	err = remove_inode_page(inode);
	354	f2fs_unlock_op(sbi);
	355	}
39936837	356
4c0c2949 JK	357	/* give more chances, if ENOMEM case */
	358	if (err == -ENOMEM) {
	359	err = 0;
	360	goto retry;
	361	}
	362
d6212a5f	363	sb_end_intwrite(inode->i_sb);
19f99cee	364	no_delete:
d5e8f6c9	365	stat_dec_inline_xattr(inode);
3289c061	366	stat_dec_inline_dir(inode);
e7a2bf22	367	stat_dec_inline_inode(inode);
0bdee482	368
8198899b	369	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
002a41ca CY	370	if (xnid)
002a41ca CY	371	invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
c9b63bd0	372	if (is_inode_flag_set(fi, FI_APPEND_WRITE))
a49324f1	373	add_ino_entry(sbi, inode->i_ino, APPEND_INO);
c9b63bd0	374	if (is_inode_flag_set(fi, FI_UPDATE_WRITE))
a49324f1	375	add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
c9b63bd0	376	if (is_inode_flag_set(fi, FI_FREE_NID)) {
221149c0	377	alloc_nid_failed(sbi, inode->i_ino);
c9b63bd0 JK	378	clear_inode_flag(fi, FI_FREE_NID);
c9b63bd0 JK	379	}
29234b1d JK	380	f2fs_bug_on(sbi, err &&
29234b1d JK	381	!exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
dbf20cb2	382	out_clear:
0b81d077	383	fscrypt_put_encryption_info(inode, NULL);
dbf20cb2	384	clear_inode(inode);
19f99cee	385	}
44c16156 JK	386
	387	/* caller should call f2fs_lock_op() */
	388	void handle_failed_inode(struct inode *inode)
	389	{
	390	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
221149c0	391	struct node_info ni;
44c16156	392
221149c0	393	/* don't make bad inode, since it becomes a regular file. */
44c16156 JK	394	unlock_new_inode(inode);
44c16156 JK	395
13ec7297	396	/*
13ec7297 CY	397	* Note: we should add inode to orphan list before f2fs_unlock_op()
	398	* so we can prevent losing this orphan when encoutering checkpoint
	399	* and following suddenly power-off.
	400	*/
221149c0 JK	401	get_node_info(sbi, inode->i_ino, &ni);
	402
	403	if (ni.blk_addr != NULL_ADDR) {
	404	int err = acquire_orphan_inode(sbi);
	405	if (err) {
	406	set_sbi_flag(sbi, SBI_NEED_FSCK);
	407	f2fs_msg(sbi->sb, KERN_WARNING,
	408	"Too many orphan inodes, run fsck to fix.");
	409	} else {
13ec7297	410	add_orphan_inode(sbi, inode->i_ino);
221149c0 JK	411	}
	412	alloc_nid_done(sbi, inode->i_ino);
	413	} else {
	414	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
13ec7297	415	}
44c16156	416
44c16156 JK	417	f2fs_unlock_op(sbi);
	418
	419	/* iput will drop the inode object */
	420	iput(inode);
	421	}