[mirror_ubuntu-zesty-kernel.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);

			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;

	f2fs_init_extent_tree(inode, &ri->i_ext);

	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);
}

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

	f2fs_wait_on_page_writeback(node_page, NODE);

	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);
	set_page_dirty(node_page);

	clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
}

void update_inode_page(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct page *node_page;
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);
		}
		return;
	}
	update_inode(inode, node_page);
	f2fs_put_page(node_page, 1);
}

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.
	 */
	update_inode_page(inode);

	f2fs_balance_fs(sbi);
	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))
		commit_inmem_pages(inode, true);

	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_dir_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);

	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);
	}

	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_dirty_inode(sbi, inode->i_ino, APPEND_INO);
	if (is_inode_flag_set(fi, FI_UPDATE_WRITE))
		add_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
	if (is_inode_flag_set(fi, FI_FREE_NID)) {
		if (err && err != -ENOENT)
			alloc_nid_done(sbi, inode->i_ino);
		else
			alloc_nid_failed(sbi, inode->i_ino);
		clear_inode_flag(fi, FI_FREE_NID);
	}

	if (err && err != -ENOENT) {
		if (!exist_written_data(sbi, inode->i_ino, ORPHAN_INO)) {
			/*
			 * get here because we failed to release resource
			 * of inode previously, reminder our user to run fsck
			 * for fixing.
			 */
			set_sbi_flag(sbi, SBI_NEED_FSCK);
			f2fs_msg(sbi->sb, KERN_WARNING,
				"inode (ino:%lu) resource leak, run fsck "
				"to fix this issue!", inode->i_ino);
		}
	}
out_clear:
#ifdef CONFIG_F2FS_FS_ENCRYPTION
	if (fi->i_crypt_info)
		f2fs_free_encryption_info(inode, fi->i_crypt_info);
#endif
	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);
	int err = 0;

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		err = f2fs_truncate(inode, false);

	if (!err)
		err = remove_inode_page(inode);

	/*
	 * if we skip truncate_node in remove_inode_page bacause we failed
	 * before, it's better to find another way to release resource of
	 * this inode (e.g. valid block count, node block or nid). Here we
	 * choose to add this inode to orphan list, so that we can call iput
	 * for releasing in orphan recovery flow.
	 *
	 * 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.
	 */
	if (err && err != -ENOENT) {
		err = acquire_orphan_inode(sbi);
		if (!err)
			add_orphan_inode(sbi, inode->i_ino);
	}

	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) {
	85	if (*start++) {
	86	f2fs_wait_on_page_writeback(ipage, NODE);
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
3e72f721	141	f2fs_init_extent_tree(inode, &ri->i_ext);
0c872e2d	142
444c580f	143	get_inline_info(fi, ri);
3d1e3807	144
b3d208f9 JK	145	/* check data exist */
b3d208f9 JK	146	if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
9e5ba77f	147	__recover_inline_status(inode, node_page);
b3d208f9	148
3d1e3807 JK	149	/* get rdev by using inline_info */
	150	__get_inode_rdev(inode, ri);
	151
3c6c2beb JK	152	if (__written_first_block(ri))
	153	set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
	154
19f99cee	155	f2fs_put_page(node_page, 1);
9d1015dd	156
d5e8f6c9	157	stat_inc_inline_xattr(inode);
9d1015dd JK	158	stat_inc_inline_inode(inode);
	159	stat_inc_inline_dir(inode);
	160
9e5ba77f	161	return 0;
19f99cee JK	162	}
	163
	164	struct inode f2fs_iget(struct super_block sb, unsigned long ino)
	165	{
	166	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	167	struct inode *inode;
a2a4a7e4	168	int ret = 0;
19f99cee JK	169
	170	inode = iget_locked(sb, ino);
	171	if (!inode)
	172	return ERR_PTR(-ENOMEM);
a2a4a7e4 NJ	173
	174	if (!(inode->i_state & I_NEW)) {
	175	trace_f2fs_iget(inode);
19f99cee	176	return inode;
a2a4a7e4	177	}
19f99cee JK	178	if (ino == F2FS_NODE_INO(sbi) \|\| ino == F2FS_META_INO(sbi))
	179	goto make_now;
	180
	181	ret = do_read_inode(inode);
	182	if (ret)
	183	goto bad_inode;
19f99cee JK	184	make_now:
	185	if (ino == F2FS_NODE_INO(sbi)) {
	186	inode->i_mapping->a_ops = &f2fs_node_aops;
	187	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	188	} else if (ino == F2FS_META_INO(sbi)) {
	189	inode->i_mapping->a_ops = &f2fs_meta_aops;
	190	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	191	} else if (S_ISREG(inode->i_mode)) {
	192	inode->i_op = &f2fs_file_inode_operations;
	193	inode->i_fop = &f2fs_file_operations;
	194	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	195	} else if (S_ISDIR(inode->i_mode)) {
	196	inode->i_op = &f2fs_dir_inode_operations;
	197	inode->i_fop = &f2fs_dir_operations;
	198	inode->i_mapping->a_ops = &f2fs_dblock_aops;
a78186eb	199	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
19f99cee	200	} else if (S_ISLNK(inode->i_mode)) {
cbaf042a JK	201	if (f2fs_encrypted_inode(inode))
	202	inode->i_op = &f2fs_encrypted_symlink_inode_operations;
	203	else
	204	inode->i_op = &f2fs_symlink_inode_operations;
21fc61c7	205	inode_nohighmem(inode);
19f99cee JK	206	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	207	} else if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode) \|\|
	208	S_ISFIFO(inode->i_mode) \|\| S_ISSOCK(inode->i_mode)) {
	209	inode->i_op = &f2fs_special_inode_operations;
	210	init_special_inode(inode, inode->i_mode, inode->i_rdev);
	211	} else {
	212	ret = -EIO;
	213	goto bad_inode;
	214	}
	215	unlock_new_inode(inode);
a2a4a7e4	216	trace_f2fs_iget(inode);
19f99cee JK	217	return inode;
	218
	219	bad_inode:
	220	iget_failed(inode);
a2a4a7e4	221	trace_f2fs_iget_exit(inode, ret);
19f99cee JK	222	return ERR_PTR(ret);
	223	}
	224
	225	void update_inode(struct inode inode, struct page node_page)
	226	{
19f99cee JK	227	struct f2fs_inode *ri;
19f99cee JK	228
5514f0aa	229	f2fs_wait_on_page_writeback(node_page, NODE);
19f99cee	230
58bfaf44	231	ri = F2FS_INODE(node_page);
19f99cee JK	232
	233	ri->i_mode = cpu_to_le16(inode->i_mode);
	234	ri->i_advise = F2FS_I(inode)->i_advise;
	235	ri->i_uid = cpu_to_le32(i_uid_read(inode));
	236	ri->i_gid = cpu_to_le32(i_gid_read(inode));
	237	ri->i_links = cpu_to_le32(inode->i_nlink);
	238	ri->i_size = cpu_to_le64(i_size_read(inode));
	239	ri->i_blocks = cpu_to_le64(inode->i_blocks);
0c872e2d	240
3e72f721 JK	241	if (F2FS_I(inode)->extent_tree)
	242	set_raw_extent(&F2FS_I(inode)->extent_tree->largest,
	243	&ri->i_ext);
	244	else
	245	memset(&ri->i_ext, 0, sizeof(ri->i_ext));
444c580f	246	set_raw_inline(F2FS_I(inode), ri);
19f99cee JK	247
	248	ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
	249	ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
	250	ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
	251	ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
	252	ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
	253	ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
	254	ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
	255	ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
	256	ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
6666e6aa	257	ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
19f99cee	258	ri->i_generation = cpu_to_le32(inode->i_generation);
38431545	259	ri->i_dir_level = F2FS_I(inode)->i_dir_level;
7d79e75f	260
3d1e3807	261	__set_inode_rdev(inode, ri);
398b1ac5	262	set_cold_node(inode, node_page);
19f99cee	263	set_page_dirty(node_page);
3d1e3807	264
b3783873	265	clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
19f99cee JK	266	}
19f99cee JK	267
744602cf	268	void update_inode_page(struct inode *inode)
19f99cee	269	{
4081363f	270	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
19f99cee	271	struct page *node_page;
744602cf	272	retry:
19f99cee	273	node_page = get_node_page(sbi, inode->i_ino);
744602cf JK	274	if (IS_ERR(node_page)) {
	275	int err = PTR_ERR(node_page);
	276	if (err == -ENOMEM) {
	277	cond_resched();
	278	goto retry;
	279	} else if (err != -ENOENT) {
	280	f2fs_stop_checkpoint(sbi);
	281	}
	282	return;
	283	}
19f99cee JK	284	update_inode(inode, node_page);
19f99cee JK	285	f2fs_put_page(node_page, 1);
19f99cee JK	286	}
19f99cee JK	287
39936837 JK	288	int f2fs_write_inode(struct inode inode, struct writeback_control wbc)
39936837 JK	289	{
4081363f	290	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
39936837 JK	291
	292	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	293	inode->i_ino == F2FS_META_INO(sbi))
	294	return 0;
	295
b3783873 JK	296	if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
	297	return 0;
	298
39936837	299	/*
c5cd29d2	300	* We need to balance fs here to prevent from producing dirty node pages
39936837 JK	301	* during the urgent cleaning time when runing out of free sections.
39936837 JK	302	*/
744602cf	303	update_inode_page(inode);
92c4342f	304
c5cd29d2	305	f2fs_balance_fs(sbi);
744602cf	306	return 0;
39936837 JK	307	}
39936837 JK	308
0a8165d7	309	/*
19f99cee JK	310	* Called at the last iput() if i_nlink is zero
	311	*/
	312	void f2fs_evict_inode(struct inode *inode)
	313	{
4081363f	314	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
c9b63bd0 JK	315	struct f2fs_inode_info *fi = F2FS_I(inode);
c9b63bd0 JK	316	nid_t xnid = fi->i_xattr_nid;
13ec7297	317	int err = 0;
19f99cee	318
88b88a66	319	/* some remained atomic pages should discarded */
1e84371f	320	if (f2fs_is_atomic_file(inode))
88b88a66 JK	321	commit_inmem_pages(inode, true);
88b88a66 JK	322
a2a4a7e4	323	trace_f2fs_evict_inode(inode);
91b0abe3	324	truncate_inode_pages_final(&inode->i_data);
19f99cee JK	325
	326	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	327	inode->i_ino == F2FS_META_INO(sbi))
dbf20cb2	328	goto out_clear;
19f99cee	329
a7ffdbe2	330	f2fs_bug_on(sbi, get_dirty_pages(inode));
19f99cee JK	331	remove_dirty_dir_inode(inode);
19f99cee JK	332
3e72f721 JK	333	f2fs_destroy_extent_tree(inode);
3e72f721 JK	334
19f99cee JK	335	if (inode->i_nlink \|\| is_bad_inode(inode))
	336	goto no_delete;
	337
d6212a5f	338	sb_start_intwrite(inode->i_sb);
c9b63bd0	339	set_inode_flag(fi, FI_NO_ALLOC);
19f99cee JK	340	i_size_write(inode, 0);
	341
	342	if (F2FS_HAS_BLOCKS(inode))
13ec7297	343	err = f2fs_truncate(inode, true);
19f99cee	344
13ec7297 CY	345	if (!err) {
	346	f2fs_lock_op(sbi);
	347	err = remove_inode_page(inode);
	348	f2fs_unlock_op(sbi);
	349	}
39936837	350
d6212a5f	351	sb_end_intwrite(inode->i_sb);
19f99cee	352	no_delete:
d5e8f6c9	353	stat_dec_inline_xattr(inode);
3289c061	354	stat_dec_inline_dir(inode);
e7a2bf22	355	stat_dec_inline_inode(inode);
0bdee482	356
8198899b	357	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
002a41ca CY	358	if (xnid)
002a41ca CY	359	invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
c9b63bd0	360	if (is_inode_flag_set(fi, FI_APPEND_WRITE))
fff04f90	361	add_dirty_inode(sbi, inode->i_ino, APPEND_INO);
c9b63bd0	362	if (is_inode_flag_set(fi, FI_UPDATE_WRITE))
fff04f90	363	add_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
c9b63bd0	364	if (is_inode_flag_set(fi, FI_FREE_NID)) {
13ec7297 CY	365	if (err && err != -ENOENT)
	366	alloc_nid_done(sbi, inode->i_ino);
	367	else
	368	alloc_nid_failed(sbi, inode->i_ino);
c9b63bd0 JK	369	clear_inode_flag(fi, FI_FREE_NID);
c9b63bd0 JK	370	}
13ec7297 CY	371
	372	if (err && err != -ENOENT) {
	373	if (!exist_written_data(sbi, inode->i_ino, ORPHAN_INO)) {
	374	/*
	375	* get here because we failed to release resource
	376	* of inode previously, reminder our user to run fsck
	377	* for fixing.
	378	*/
	379	set_sbi_flag(sbi, SBI_NEED_FSCK);
	380	f2fs_msg(sbi->sb, KERN_WARNING,
	381	"inode (ino:%lu) resource leak, run fsck "
	382	"to fix this issue!", inode->i_ino);
	383	}
	384	}
dbf20cb2	385	out_clear:
fcc85a4d	386	#ifdef CONFIG_F2FS_FS_ENCRYPTION
c9b63bd0 JK	387	if (fi->i_crypt_info)
c9b63bd0 JK	388	f2fs_free_encryption_info(inode, fi->i_crypt_info);
fcc85a4d	389	#endif
dbf20cb2	390	clear_inode(inode);
19f99cee	391	}
44c16156 JK	392
	393	/* caller should call f2fs_lock_op() */
	394	void handle_failed_inode(struct inode *inode)
	395	{
	396	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ec7297	397	int err = 0;
44c16156 JK	398
	399	clear_nlink(inode);
	400	make_bad_inode(inode);
	401	unlock_new_inode(inode);
	402
	403	i_size_write(inode, 0);
	404	if (F2FS_HAS_BLOCKS(inode))
13ec7297 CY	405	err = f2fs_truncate(inode, false);
	406
	407	if (!err)
	408	err = remove_inode_page(inode);
44c16156	409
13ec7297 CY	410	/*
	411	* if we skip truncate_node in remove_inode_page bacause we failed
	412	* before, it's better to find another way to release resource of
	413	* this inode (e.g. valid block count, node block or nid). Here we
	414	* choose to add this inode to orphan list, so that we can call iput
	415	* for releasing in orphan recovery flow.
	416	*
	417	* Note: we should add inode to orphan list before f2fs_unlock_op()
	418	* so we can prevent losing this orphan when encoutering checkpoint
	419	* and following suddenly power-off.
	420	*/
	421	if (err && err != -ENOENT) {
	422	err = acquire_orphan_inode(sbi);
	423	if (!err)
	424	add_orphan_inode(sbi, inode->i_ino);
	425	}
44c16156	426
c9b63bd0	427	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
44c16156 JK	428	f2fs_unlock_op(sbi);
	429
	430	/* iput will drop the inode object */
	431	iput(inode);
	432	}