[linux-2.6-block.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;

	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->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);

	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);

	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);
		}
		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))
		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_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_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)) {
		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
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;
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
12719ae1	225	int update_inode(struct inode inode, struct page node_page)
19f99cee	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);
b3783873	263	clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
12719ae1 JK	264
12719ae1 JK	265	return set_page_dirty(node_page);
19f99cee JK	266	}
19f99cee JK	267
12719ae1	268	int 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;
12719ae1	272	int ret = 0;
744602cf	273	retry:
19f99cee	274	node_page = get_node_page(sbi, inode->i_ino);
744602cf JK	275	if (IS_ERR(node_page)) {
	276	int err = PTR_ERR(node_page);
	277	if (err == -ENOMEM) {
	278	cond_resched();
	279	goto retry;
	280	} else if (err != -ENOENT) {
	281	f2fs_stop_checkpoint(sbi);
	282	}
12719ae1	283	return 0;
744602cf	284	}
12719ae1	285	ret = update_inode(inode, node_page);
19f99cee	286	f2fs_put_page(node_page, 1);
12719ae1	287	return ret;
19f99cee JK	288	}
19f99cee JK	289
39936837 JK	290	int f2fs_write_inode(struct inode inode, struct writeback_control wbc)
39936837 JK	291	{
4081363f	292	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
39936837 JK	293
	294	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	295	inode->i_ino == F2FS_META_INO(sbi))
	296	return 0;
	297
b3783873 JK	298	if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
	299	return 0;
	300
39936837	301	/*
c5cd29d2	302	* We need to balance fs here to prevent from producing dirty node pages
39936837 JK	303	* during the urgent cleaning time when runing out of free sections.
39936837 JK	304	*/
12719ae1	305	if (update_inode_page(inode))
2c4db1a6	306	f2fs_balance_fs(sbi, true);
744602cf	307	return 0;
39936837 JK	308	}
39936837 JK	309
0a8165d7	310	/*
19f99cee JK	311	* Called at the last iput() if i_nlink is zero
	312	*/
	313	void f2fs_evict_inode(struct inode *inode)
	314	{
4081363f	315	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
c9b63bd0 JK	316	struct f2fs_inode_info *fi = F2FS_I(inode);
c9b63bd0 JK	317	nid_t xnid = fi->i_xattr_nid;
13ec7297	318	int err = 0;
19f99cee	319
88b88a66	320	/* some remained atomic pages should discarded */
1e84371f	321	if (f2fs_is_atomic_file(inode))
88b88a66 JK	322	commit_inmem_pages(inode, true);
88b88a66 JK	323
a2a4a7e4	324	trace_f2fs_evict_inode(inode);
91b0abe3	325	truncate_inode_pages_final(&inode->i_data);
19f99cee JK	326
	327	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	328	inode->i_ino == F2FS_META_INO(sbi))
dbf20cb2	329	goto out_clear;
19f99cee	330
a7ffdbe2	331	f2fs_bug_on(sbi, get_dirty_pages(inode));
c227f912	332	remove_dirty_inode(inode);
19f99cee	333
3e72f721 JK	334	f2fs_destroy_extent_tree(inode);
3e72f721 JK	335
19f99cee JK	336	if (inode->i_nlink \|\| is_bad_inode(inode))
	337	goto no_delete;
	338
d6212a5f	339	sb_start_intwrite(inode->i_sb);
c9b63bd0	340	set_inode_flag(fi, FI_NO_ALLOC);
19f99cee JK	341	i_size_write(inode, 0);
	342
	343	if (F2FS_HAS_BLOCKS(inode))
13ec7297	344	err = f2fs_truncate(inode, true);
19f99cee	345
13ec7297 CY	346	if (!err) {
	347	f2fs_lock_op(sbi);
	348	err = remove_inode_page(inode);
	349	f2fs_unlock_op(sbi);
	350	}
39936837	351
d6212a5f	352	sb_end_intwrite(inode->i_sb);
19f99cee	353	no_delete:
d5e8f6c9	354	stat_dec_inline_xattr(inode);
3289c061	355	stat_dec_inline_dir(inode);
e7a2bf22	356	stat_dec_inline_inode(inode);
0bdee482	357
8198899b	358	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
002a41ca CY	359	if (xnid)
002a41ca CY	360	invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
c9b63bd0	361	if (is_inode_flag_set(fi, FI_APPEND_WRITE))
a49324f1	362	add_ino_entry(sbi, inode->i_ino, APPEND_INO);
c9b63bd0	363	if (is_inode_flag_set(fi, FI_UPDATE_WRITE))
a49324f1	364	add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
c9b63bd0	365	if (is_inode_flag_set(fi, FI_FREE_NID)) {
13ec7297 CY	366	if (err && err != -ENOENT)
	367	alloc_nid_done(sbi, inode->i_ino);
	368	else
	369	alloc_nid_failed(sbi, inode->i_ino);
c9b63bd0 JK	370	clear_inode_flag(fi, FI_FREE_NID);
c9b63bd0 JK	371	}
13ec7297 CY	372
	373	if (err && err != -ENOENT) {
	374	if (!exist_written_data(sbi, inode->i_ino, ORPHAN_INO)) {
	375	/*
	376	* get here because we failed to release resource
	377	* of inode previously, reminder our user to run fsck
	378	* for fixing.
	379	*/
	380	set_sbi_flag(sbi, SBI_NEED_FSCK);
	381	f2fs_msg(sbi->sb, KERN_WARNING,
	382	"inode (ino:%lu) resource leak, run fsck "
	383	"to fix this issue!", inode->i_ino);
	384	}
	385	}
dbf20cb2	386	out_clear:
fcc85a4d	387	#ifdef CONFIG_F2FS_FS_ENCRYPTION
c9b63bd0 JK	388	if (fi->i_crypt_info)
c9b63bd0 JK	389	f2fs_free_encryption_info(inode, fi->i_crypt_info);
fcc85a4d	390	#endif
dbf20cb2	391	clear_inode(inode);
19f99cee	392	}
44c16156 JK	393
	394	/* caller should call f2fs_lock_op() */
	395	void handle_failed_inode(struct inode *inode)
	396	{
	397	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ec7297	398	int err = 0;
44c16156 JK	399
	400	clear_nlink(inode);
	401	make_bad_inode(inode);
	402	unlock_new_inode(inode);
	403
	404	i_size_write(inode, 0);
	405	if (F2FS_HAS_BLOCKS(inode))
13ec7297 CY	406	err = f2fs_truncate(inode, false);
	407
	408	if (!err)
	409	err = remove_inode_page(inode);
44c16156	410
13ec7297 CY	411	/*
	412	* if we skip truncate_node in remove_inode_page bacause we failed
	413	* before, it's better to find another way to release resource of
	414	* this inode (e.g. valid block count, node block or nid). Here we
	415	* choose to add this inode to orphan list, so that we can call iput
	416	* for releasing in orphan recovery flow.
	417	*
	418	* Note: we should add inode to orphan list before f2fs_unlock_op()
	419	* so we can prevent losing this orphan when encoutering checkpoint
	420	* and following suddenly power-off.
	421	*/
	422	if (err && err != -ENOENT) {
	423	err = acquire_orphan_inode(sbi);
	424	if (!err)
	425	add_orphan_inode(sbi, inode->i_ino);
	426	}
44c16156	427
c9b63bd0	428	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
44c16156 JK	429	f2fs_unlock_op(sbi);
	430
	431	/* iput will drop the inode object */
	432	iput(inode);
	433	}