[mirror_ubuntu-hirsute-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;

	inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
			S_NOATIME | S_DIRSYNC);

	if (flags & FS_SYNC_FL)
		inode->i_flags |= S_SYNC;
	if (flags & FS_APPEND_FL)
		inode->i_flags |= S_APPEND;
	if (flags & FS_IMMUTABLE_FL)
		inode->i_flags |= S_IMMUTABLE;
	if (flags & FS_NOATIME_FL)
		inode->i_flags |= S_NOATIME;
	if (flags & FS_DIRSYNC_FL)
		inode->i_flags |= S_DIRSYNC;
}

static int do_read_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	struct page *node_page;
	struct f2fs_node *rn;
	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);
		return -EINVAL;
	}

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

	rn = page_address(node_page);
	ri = &(rn->i);

	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);
	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]));

	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);
	get_extent_info(&fi->ext, ri->i_ext);
	f2fs_put_page(node_page, 1);
	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_ZERO);
	} else if (S_ISLNK(inode->i_mode)) {
		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);
}

void update_inode(struct inode *inode, struct page *node_page)
{
	struct f2fs_node *rn;
	struct f2fs_inode *ri;

	wait_on_page_writeback(node_page);

	rn = page_address(node_page);
	ri = &(rn->i);

	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);
	set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);

	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);

	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;
		}
	}

	set_cold_node(inode, node_page);
	set_page_dirty(node_page);
}

int update_inode_page(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct page *node_page;

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

	update_inode(inode, node_page);
	f2fs_put_page(node_page, 1);
	return 0;
}

int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	int ret, ilock;

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

	if (wbc)
		f2fs_balance_fs(sbi);

	/*
	 * We need to lock here to prevent from producing dirty node pages
	 * during the urgent cleaning time when runing out of free sections.
	 */
	ilock = mutex_lock_op(sbi);
	ret = update_inode_page(inode);
	mutex_unlock_op(sbi, ilock);
	return ret;
}

/*
 * Called at the last iput() if i_nlink is zero
 */
void f2fs_evict_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	int ilock;

	trace_f2fs_evict_inode(inode);
	truncate_inode_pages(&inode->i_data, 0);

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

	BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
	remove_dirty_dir_inode(inode);

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

	sb_start_intwrite(inode->i_sb);
	set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
	i_size_write(inode, 0);

	if (F2FS_HAS_BLOCKS(inode))
		f2fs_truncate(inode);

	ilock = mutex_lock_op(sbi);
	remove_inode_page(inode);
	mutex_unlock_op(sbi, ilock);

	sb_end_intwrite(inode->i_sb);
no_delete:
	clear_inode(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;
	24
	25	inode->i_flags &= ~(S_SYNC \| S_APPEND \| S_IMMUTABLE \|
	26	S_NOATIME \| S_DIRSYNC);
	27
	28	if (flags & FS_SYNC_FL)
	29	inode->i_flags \|= S_SYNC;
	30	if (flags & FS_APPEND_FL)
	31	inode->i_flags \|= S_APPEND;
	32	if (flags & FS_IMMUTABLE_FL)
	33	inode->i_flags \|= S_IMMUTABLE;
	34	if (flags & FS_NOATIME_FL)
	35	inode->i_flags \|= S_NOATIME;
	36	if (flags & FS_DIRSYNC_FL)
	37	inode->i_flags \|= S_DIRSYNC;
	38	}
	39
19f99cee JK	40	static int do_read_inode(struct inode *inode)
	41	{
	42	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	43	struct f2fs_inode_info *fi = F2FS_I(inode);
	44	struct page *node_page;
	45	struct f2fs_node *rn;
	46	struct f2fs_inode *ri;
	47
	48	/* Check if ino is within scope */
064e0823 NJ	49	if (check_nid_range(sbi, inode->i_ino)) {
	50	f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
	51	(unsigned long) inode->i_ino);
	52	return -EINVAL;
	53	}
19f99cee JK	54
	55	node_page = get_node_page(sbi, inode->i_ino);
	56	if (IS_ERR(node_page))
	57	return PTR_ERR(node_page);
	58
	59	rn = page_address(node_page);
	60	ri = &(rn->i);
	61
	62	inode->i_mode = le16_to_cpu(ri->i_mode);
	63	i_uid_write(inode, le32_to_cpu(ri->i_uid));
	64	i_gid_write(inode, le32_to_cpu(ri->i_gid));
	65	set_nlink(inode, le32_to_cpu(ri->i_links));
	66	inode->i_size = le64_to_cpu(ri->i_size);
	67	inode->i_blocks = le64_to_cpu(ri->i_blocks);
	68
	69	inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
	70	inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
	71	inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
	72	inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
	73	inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
	74	inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
	75	inode->i_generation = le32_to_cpu(ri->i_generation);
7d79e75f CL	76	if (ri->i_addr[0])
	77	inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0]));
	78	else
	79	inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1]));
19f99cee JK	80
	81	fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
	82	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
	83	fi->i_flags = le32_to_cpu(ri->i_flags);
	84	fi->flags = 0;
19f99cee	85	fi->i_advise = ri->i_advise;
6666e6aa	86	fi->i_pino = le32_to_cpu(ri->i_pino);
19f99cee JK	87	get_extent_info(&fi->ext, ri->i_ext);
	88	f2fs_put_page(node_page, 1);
	89	return 0;
	90	}
	91
	92	struct inode f2fs_iget(struct super_block sb, unsigned long ino)
	93	{
	94	struct f2fs_sb_info *sbi = F2FS_SB(sb);
	95	struct inode *inode;
a2a4a7e4	96	int ret = 0;
19f99cee JK	97
	98	inode = iget_locked(sb, ino);
	99	if (!inode)
	100	return ERR_PTR(-ENOMEM);
a2a4a7e4 NJ	101
	102	if (!(inode->i_state & I_NEW)) {
	103	trace_f2fs_iget(inode);
19f99cee	104	return inode;
a2a4a7e4	105	}
19f99cee JK	106	if (ino == F2FS_NODE_INO(sbi) \|\| ino == F2FS_META_INO(sbi))
	107	goto make_now;
	108
	109	ret = do_read_inode(inode);
	110	if (ret)
	111	goto bad_inode;
19f99cee JK	112	make_now:
	113	if (ino == F2FS_NODE_INO(sbi)) {
	114	inode->i_mapping->a_ops = &f2fs_node_aops;
	115	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	116	} else if (ino == F2FS_META_INO(sbi)) {
	117	inode->i_mapping->a_ops = &f2fs_meta_aops;
	118	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
	119	} else if (S_ISREG(inode->i_mode)) {
	120	inode->i_op = &f2fs_file_inode_operations;
	121	inode->i_fop = &f2fs_file_operations;
	122	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	123	} else if (S_ISDIR(inode->i_mode)) {
	124	inode->i_op = &f2fs_dir_inode_operations;
	125	inode->i_fop = &f2fs_dir_operations;
	126	inode->i_mapping->a_ops = &f2fs_dblock_aops;
6f85b352	127	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
19f99cee JK	128	} else if (S_ISLNK(inode->i_mode)) {
	129	inode->i_op = &f2fs_symlink_inode_operations;
	130	inode->i_mapping->a_ops = &f2fs_dblock_aops;
	131	} else if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode) \|\|
	132	S_ISFIFO(inode->i_mode) \|\| S_ISSOCK(inode->i_mode)) {
	133	inode->i_op = &f2fs_special_inode_operations;
	134	init_special_inode(inode, inode->i_mode, inode->i_rdev);
	135	} else {
	136	ret = -EIO;
	137	goto bad_inode;
	138	}
	139	unlock_new_inode(inode);
a2a4a7e4	140	trace_f2fs_iget(inode);
19f99cee JK	141	return inode;
	142
	143	bad_inode:
	144	iget_failed(inode);
a2a4a7e4	145	trace_f2fs_iget_exit(inode, ret);
19f99cee JK	146	return ERR_PTR(ret);
	147	}
	148
	149	void update_inode(struct inode inode, struct page node_page)
	150	{
	151	struct f2fs_node *rn;
	152	struct f2fs_inode *ri;
	153
	154	wait_on_page_writeback(node_page);
	155
	156	rn = page_address(node_page);
	157	ri = &(rn->i);
	158
	159	ri->i_mode = cpu_to_le16(inode->i_mode);
	160	ri->i_advise = F2FS_I(inode)->i_advise;
	161	ri->i_uid = cpu_to_le32(i_uid_read(inode));
	162	ri->i_gid = cpu_to_le32(i_gid_read(inode));
	163	ri->i_links = cpu_to_le32(inode->i_nlink);
	164	ri->i_size = cpu_to_le64(i_size_read(inode));
	165	ri->i_blocks = cpu_to_le64(inode->i_blocks);
	166	set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
	167
	168	ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
	169	ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
	170	ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
	171	ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
	172	ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
	173	ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
	174	ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
	175	ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
	176	ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
6666e6aa	177	ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
19f99cee	178	ri->i_generation = cpu_to_le32(inode->i_generation);
7d79e75f CL	179
	180	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode)) {
	181	if (old_valid_dev(inode->i_rdev)) {
	182	ri->i_addr[0] =
	183	cpu_to_le32(old_encode_dev(inode->i_rdev));
	184	ri->i_addr[1] = 0;
	185	} else {
	186	ri->i_addr[0] = 0;
	187	ri->i_addr[1] =
	188	cpu_to_le32(new_encode_dev(inode->i_rdev));
	189	ri->i_addr[2] = 0;
	190	}
	191	}
	192
398b1ac5	193	set_cold_node(inode, node_page);
19f99cee JK	194	set_page_dirty(node_page);
	195	}
	196
39936837	197	int update_inode_page(struct inode *inode)
19f99cee JK	198	{
	199	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	200	struct page *node_page;
7d82db83	201
19f99cee JK	202	node_page = get_node_page(sbi, inode->i_ino);
	203	if (IS_ERR(node_page))
	204	return PTR_ERR(node_page);
	205
19f99cee JK	206	update_inode(inode, node_page);
19f99cee JK	207	f2fs_put_page(node_page, 1);
19f99cee JK	208	return 0;
	209	}
	210
39936837 JK	211	int f2fs_write_inode(struct inode inode, struct writeback_control wbc)
	212	{
	213	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	214	int ret, ilock;
	215
	216	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	217	inode->i_ino == F2FS_META_INO(sbi))
	218	return 0;
	219
	220	if (wbc)
	221	f2fs_balance_fs(sbi);
	222
	223	/*
	224	* We need to lock here to prevent from producing dirty node pages
	225	* during the urgent cleaning time when runing out of free sections.
	226	*/
	227	ilock = mutex_lock_op(sbi);
	228	ret = update_inode_page(inode);
	229	mutex_unlock_op(sbi, ilock);
	230	return ret;
	231	}
	232
0a8165d7	233	/*
19f99cee JK	234	* Called at the last iput() if i_nlink is zero
	235	*/
	236	void f2fs_evict_inode(struct inode *inode)
	237	{
	238	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
39936837	239	int ilock;
19f99cee	240
a2a4a7e4	241	trace_f2fs_evict_inode(inode);
19f99cee JK	242	truncate_inode_pages(&inode->i_data, 0);
	243
	244	if (inode->i_ino == F2FS_NODE_INO(sbi) \|\|
	245	inode->i_ino == F2FS_META_INO(sbi))
	246	goto no_delete;
	247
	248	BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
	249	remove_dirty_dir_inode(inode);
	250
	251	if (inode->i_nlink \|\| is_bad_inode(inode))
	252	goto no_delete;
	253
d6212a5f	254	sb_start_intwrite(inode->i_sb);
19f99cee JK	255	set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
	256	i_size_write(inode, 0);
	257
	258	if (F2FS_HAS_BLOCKS(inode))
	259	f2fs_truncate(inode);
	260
39936837	261	ilock = mutex_lock_op(sbi);
19f99cee	262	remove_inode_page(inode);
39936837 JK	263	mutex_unlock_op(sbi, ilock);
39936837 JK	264
d6212a5f	265	sb_end_intwrite(inode->i_sb);
19f99cee JK	266	no_delete:
	267	clear_inode(inode);
	268	}