fs/f2fs/inode.c - kernel/msm-4.19 - Gitiles

 /*
  * 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/backing-dev.h>
 #include <linux/writeback.h>

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

 #include <trace/events/f2fs.h>

 void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
 {
 	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 & 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)
 {
 	int extra_size = get_extra_isize(inode);

 	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[extra_size])
 			inode->i_rdev = old_decode_dev(
 				le32_to_cpu(ri->i_addr[extra_size]));
 		else
 			inode->i_rdev = new_decode_dev(
 				le32_to_cpu(ri->i_addr[extra_size + 1]));
 	}
 }

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

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

 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
 {
 	int extra_size = get_extra_isize(inode);

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

 			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;
 	int extra_isize = le32_to_cpu(ri->i_extra_isize);

 	if (!f2fs_sb_has_inode_chksum(sbi->sb))
 		return false;

 	if (!RAW_IS_INODE(F2FS_NODE(page)) || !(ri->i_inline & F2FS_EXTRA_ATTR))
 		return false;

 	if (!F2FS_FITS_IN_INODE(ri, 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 (!f2fs_enable_inode_chksum(sbi, page) ||
 			PageDirty(page) || PageWriteback(page))
 		return true;

 	ri = &F2FS_NODE(page)->i;
 	provided = le32_to_cpu(ri->i_inode_checksum);
 	calculated = f2fs_inode_chksum(sbi, page);

 	if (provided != calculated)
 		f2fs_msg(sbi->sb, KERN_WARNING,
 			"checksum invalid, ino = %x, %x vs. %x",
 			ino_of_node(page), provided, calculated);

 	return provided == calculated;
 }

 void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
 {
 	struct f2fs_inode *ri = &F2FS_NODE(page)->i;

 	if (!f2fs_enable_inode_chksum(sbi, page))
 		return;

 	ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
 }

 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;
 	projid_t i_projid;

 	/* 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 = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);

 	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(inode, ri);

 	fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
 					le16_to_cpu(ri->i_extra_isize) : 0;

 	/* 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(inode, FI_FIRST_BLOCK_WRITTEN);

 	if (!need_inode_block_update(sbi, inode->i_ino))
 		fi->last_disk_size = inode->i_size;

 	if (fi->i_flags & FS_PROJINHERIT_FL)
 		set_inode_flag(inode, FI_PROJ_INHERIT);

 	if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
 			F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
 		i_projid = (projid_t)le32_to_cpu(ri->i_projid);
 	else
 		i_projid = F2FS_DEF_PROJID;
 	fi->i_projid = make_kprojid(&init_user_ns, i_projid);

 	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;
 	}
 	f2fs_set_inode_flags(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);
 }

 struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
 {
 	struct inode *inode;
 retry:
 	inode = f2fs_iget(sb, ino);
 	if (IS_ERR(inode)) {
 		if (PTR_ERR(inode) == -ENOMEM) {
 			congestion_wait(BLK_RW_ASYNC, HZ/50);
 			goto retry;
 		}
 	}
 	return inode;
 }

 int update_inode(struct inode *inode, struct page *node_page)
 {
 	struct f2fs_inode *ri;
 	struct extent_tree *et = F2FS_I(inode)->extent_tree;

 	f2fs_inode_synced(inode);

 	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(SECTOR_TO_BLOCK(inode->i_blocks) + 1);

 	if (et) {
 		read_lock(&et->lock);
 		set_raw_extent(&et->largest, &ri->i_ext);
 		read_unlock(&et->lock);
 	} else {
 		memset(&ri->i_ext, 0, sizeof(ri->i_ext));
 	}
 	set_raw_inline(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;

 	if (f2fs_has_extra_attr(inode)) {
 		ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);

 		if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
 			F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 								i_projid)) {
 			projid_t i_projid;

 			i_projid = from_kprojid(&init_user_ns,
 						F2FS_I(inode)->i_projid);
 			ri->i_projid = cpu_to_le32(i_projid);
 		}
 	}

 	__set_inode_rdev(inode, ri);
 	set_cold_node(inode, node_page);

 	/* 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(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);
 	if (wbc && wbc->nr_to_write)
 		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);
 	nid_t xnid = F2FS_I(inode)->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;

 	dquot_initialize(inode);

 	remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
 	remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);

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

 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
 		f2fs_show_injection_info(FAULT_EVICT_INODE);
 		err = -EIO;
 	}
 #endif
 	if (!err) {
 		f2fs_lock_op(sbi);
 		err = remove_inode_page(inode);
 		f2fs_unlock_op(sbi);
 		if (err == -ENOENT)
 			err = 0;
 	}

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

 	if (err)
 		update_inode_page(inode);
 	dquot_free_inode(inode);
 	sb_end_intwrite(inode->i_sb);
 no_delete:
 	dquot_drop(inode);

 	stat_dec_inline_xattr(inode);
 	stat_dec_inline_dir(inode);
 	stat_dec_inline_inode(inode);

 	/* ino == 0, if f2fs_new_inode() was failed t*/
 	if (inode->i_ino)
 		invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
 							inode->i_ino);
 	if (xnid)
 		invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
 	if (inode->i_nlink) {
 		if (is_inode_flag_set(inode, FI_APPEND_WRITE))
 			add_ino_entry(sbi, inode->i_ino, APPEND_INO);
 		if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
 			add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 	}
 	if (is_inode_flag_set(inode, FI_FREE_NID)) {
 		alloc_nid_failed(sbi, inode->i_ino);
 		clear_inode_flag(inode, FI_FREE_NID);
 	} else {
 		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;

 	/*
 	 * clear nlink of inode in order to release resource of inode
 	 * immediately.
 	 */
 	clear_nlink(inode);

 	/*
 	 * we must call this to avoid inode being remained as dirty, resulting
 	 * in a panic when flushing dirty inodes in gdirty_list.
 	 */
 	update_inode_page(inode);
 	f2fs_inode_synced(inode);

 	/* 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(inode);
 		}
 		alloc_nid_done(sbi, inode->i_ino);
 	} else {
 		set_inode_flag(inode, FI_FREE_NID);
 	}

 	f2fs_unlock_op(sbi);

 	/* iput will drop the inode object */
 	iput(inode);
 }
	/*
	* 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/backing-dev.h>
	#include <linux/writeback.h>

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

	#include <trace/events/f2fs.h>

	void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
	{
	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 & 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)
	{
	int extra_size = get_extra_isize(inode);

	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[extra_size])
	inode->i_rdev = old_decode_dev(
	le32_to_cpu(ri->i_addr[extra_size]));
	else
	inode->i_rdev = new_decode_dev(
	le32_to_cpu(ri->i_addr[extra_size + 1]));
	}
	}

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

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

	static void __set_inode_rdev(struct inode inode, struct f2fs_inode ri)
	{
	int extra_size = get_extra_isize(inode);

	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode)) {
	if (old_valid_dev(inode->i_rdev)) {
	ri->i_addr[extra_size] =
	cpu_to_le32(old_encode_dev(inode->i_rdev));
	ri->i_addr[extra_size + 1] = 0;
	} else {
	ri->i_addr[extra_size] = 0;
	ri->i_addr[extra_size + 1] =
	cpu_to_le32(new_encode_dev(inode->i_rdev));
	ri->i_addr[extra_size + 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);

	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;
	int extra_isize = le32_to_cpu(ri->i_extra_isize);

	if (!f2fs_sb_has_inode_chksum(sbi->sb))
	return false;

	if (!RAW_IS_INODE(F2FS_NODE(page)) \|\| !(ri->i_inline & F2FS_EXTRA_ATTR))
	return false;

	if (!F2FS_FITS_IN_INODE(ri, 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 (!f2fs_enable_inode_chksum(sbi, page) \|\|
	PageDirty(page) \|\| PageWriteback(page))
	return true;

	ri = &F2FS_NODE(page)->i;
	provided = le32_to_cpu(ri->i_inode_checksum);
	calculated = f2fs_inode_chksum(sbi, page);

	if (provided != calculated)
	f2fs_msg(sbi->sb, KERN_WARNING,
	"checksum invalid, ino = %x, %x vs. %x",
	ino_of_node(page), provided, calculated);

	return provided == calculated;
	}

	void f2fs_inode_chksum_set(struct f2fs_sb_info sbi, struct page page)
	{
	struct f2fs_inode *ri = &F2FS_NODE(page)->i;

	if (!f2fs_enable_inode_chksum(sbi, page))
	return;

	ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
	}

	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;
	projid_t i_projid;

	/* 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 = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);

	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(inode, ri);

	fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
	le16_to_cpu(ri->i_extra_isize) : 0;

	/* 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(inode, FI_FIRST_BLOCK_WRITTEN);

	if (!need_inode_block_update(sbi, inode->i_ino))
	fi->last_disk_size = inode->i_size;

	if (fi->i_flags & FS_PROJINHERIT_FL)
	set_inode_flag(inode, FI_PROJ_INHERIT);

	if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
	F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
	i_projid = (projid_t)le32_to_cpu(ri->i_projid);
	else
	i_projid = F2FS_DEF_PROJID;
	fi->i_projid = make_kprojid(&init_user_ns, i_projid);

	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;
	}
	f2fs_set_inode_flags(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);
	}

	struct inode f2fs_iget_retry(struct super_block sb, unsigned long ino)
	{
	struct inode *inode;
	retry:
	inode = f2fs_iget(sb, ino);
	if (IS_ERR(inode)) {
	if (PTR_ERR(inode) == -ENOMEM) {
	congestion_wait(BLK_RW_ASYNC, HZ/50);
	goto retry;
	}
	}
	return inode;
	}

	int update_inode(struct inode inode, struct page node_page)
	{
	struct f2fs_inode *ri;
	struct extent_tree *et = F2FS_I(inode)->extent_tree;

	f2fs_inode_synced(inode);

	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(SECTOR_TO_BLOCK(inode->i_blocks) + 1);

	if (et) {
	read_lock(&et->lock);
	set_raw_extent(&et->largest, &ri->i_ext);
	read_unlock(&et->lock);
	} else {
	memset(&ri->i_ext, 0, sizeof(ri->i_ext));
	}
	set_raw_inline(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;

	if (f2fs_has_extra_attr(inode)) {
	ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);

	if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
	F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
	i_projid)) {
	projid_t i_projid;

	i_projid = from_kprojid(&init_user_ns,
	F2FS_I(inode)->i_projid);
	ri->i_projid = cpu_to_le32(i_projid);
	}
	}

	__set_inode_rdev(inode, ri);
	set_cold_node(inode, node_page);

	/* 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(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);
	if (wbc && wbc->nr_to_write)
	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);
	nid_t xnid = F2FS_I(inode)->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;

	dquot_initialize(inode);

	remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
	remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);

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

	#ifdef CONFIG_F2FS_FAULT_INJECTION
	if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
	f2fs_show_injection_info(FAULT_EVICT_INODE);
	err = -EIO;
	}
	#endif
	if (!err) {
	f2fs_lock_op(sbi);
	err = remove_inode_page(inode);
	f2fs_unlock_op(sbi);
	if (err == -ENOENT)
	err = 0;
	}

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

	if (err)
	update_inode_page(inode);
	dquot_free_inode(inode);
	sb_end_intwrite(inode->i_sb);
	no_delete:
	dquot_drop(inode);

	stat_dec_inline_xattr(inode);
	stat_dec_inline_dir(inode);
	stat_dec_inline_inode(inode);

	/* ino == 0, if f2fs_new_inode() was failed t*/
	if (inode->i_ino)
	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
	inode->i_ino);
	if (xnid)
	invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
	if (inode->i_nlink) {
	if (is_inode_flag_set(inode, FI_APPEND_WRITE))
	add_ino_entry(sbi, inode->i_ino, APPEND_INO);
	if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
	add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
	}
	if (is_inode_flag_set(inode, FI_FREE_NID)) {
	alloc_nid_failed(sbi, inode->i_ino);
	clear_inode_flag(inode, FI_FREE_NID);
	} else {
	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;

	/*
	* clear nlink of inode in order to release resource of inode
	* immediately.
	*/
	clear_nlink(inode);

	/*
	* we must call this to avoid inode being remained as dirty, resulting
	* in a panic when flushing dirty inodes in gdirty_list.
	*/
	update_inode_page(inode);
	f2fs_inode_synced(inode);

	/* 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(inode);
	}
	alloc_nid_done(sbi, inode->i_ino);
	} else {
	set_inode_flag(inode, FI_FREE_NID);
	}

	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
	}