path: root/fs/f2fs/inode.c

// SPDX-License-Identifier: GPL-2.0
/*
 * fs/f2fs/inode.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 */
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>
#include <linux/sched/mm.h>
#include <linux/lz4.h>
#include <linux/zstd.h>

#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "xattr.h"

#include <trace/events/f2fs.h>

#ifdef CONFIG_F2FS_FS_COMPRESSION
extern const struct address_space_operations f2fs_compress_aops;
#endif

void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
{
	if (is_inode_flag_set(inode, FI_NEW_INODE))
		return;

	if (f2fs_inode_dirtied(inode, sync))
		return;

	mark_inode_dirty_sync(inode);
}

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

	if (flags & F2FS_SYNC_FL)
		new_fl |= S_SYNC;
	if (flags & F2FS_APPEND_FL)
		new_fl |= S_APPEND;
	if (flags & F2FS_IMMUTABLE_FL)
		new_fl |= S_IMMUTABLE;
	if (flags & F2FS_NOATIME_FL)
		new_fl |= S_NOATIME;
	if (flags & F2FS_DIRSYNC_FL)
		new_fl |= S_DIRSYNC;
	if (file_is_encrypt(inode))
		new_fl |= S_ENCRYPTED;
	if (file_is_verity(inode))
		new_fl |= S_VERITY;
	if (flags & F2FS_CASEFOLD_FL)
		new_fl |= S_CASEFOLD;
	inode_set_flags(inode, new_fl,
			S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
			S_ENCRYPTED|S_VERITY|S_CASEFOLD);
}

static void __get_inode_rdev(struct inode *inode, struct page *node_page)
{
	__le32 *addr = get_dnode_addr(inode, node_page);

	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
			S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
		if (addr[0])
			inode->i_rdev = old_decode_dev(le32_to_cpu(addr[0]));
		else
			inode->i_rdev = new_decode_dev(le32_to_cpu(addr[1]));
	}
}

static void __set_inode_rdev(struct inode *inode, struct page *node_page)
{
	__le32 *addr = get_dnode_addr(inode, node_page);

	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
		if (old_valid_dev(inode->i_rdev)) {
			addr[0] = cpu_to_le32(old_encode_dev(inode->i_rdev));
			addr[1] = 0;
		} else {
			addr[0] = 0;
			addr[1] = cpu_to_le32(new_encode_dev(inode->i_rdev));
			addr[2] = 0;
		}
	}
}

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

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

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

static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
{
	struct f2fs_inode *ri = &F2FS_NODE(page)->i;

	if (!f2fs_sb_has_inode_chksum(sbi))
		return false;

	if (!IS_INODE(page) || !(ri->i_inline & F2FS_EXTRA_ATTR))
		return false;

	if (!F2FS_FITS_IN_INODE(ri, le16_to_cpu(ri->i_extra_isize),
				i_inode_checksum))
		return false;

	return true;
}

static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
{
	struct f2fs_node *node = F2FS_NODE(page);
	struct f2fs_inode *ri = &node->i;
	__le32 ino = node->footer.ino;
	__le32 gen = ri->i_generation;
	__u32 chksum, chksum_seed;
	__u32 dummy_cs = 0;
	unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
	unsigned int cs_size = sizeof(dummy_cs);

	chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
							sizeof(ino));
	chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));

	chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
	chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
	offset += cs_size;
	chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
						F2FS_BLKSIZE - offset);
	return chksum;
}

bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
{
	struct f2fs_inode *ri;
	__u32 provided, calculated;

	if (unlikely(is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)))
		return true;

#ifdef CONFIG_F2FS_CHECK_FS
	if (!f2fs_enable_inode_chksum(sbi</