// SPDX-License-Identifier: GPL-2.0/* * fs/f2fs/inline.c * Copyright (c) 2013, Intel Corporation * Authors: Huajun Li <huajun.li@intel.com> *          Haicheng Li <haicheng.li@intel.com> */ #include <linux/fs.h>#include <linux/f2fs_fs.h>#include <linux/fiemap.h> #include "f2fs.h"#include "node.h"#include <trace/events/f2fs.h> bool f2fs_may_inline_data(struct inode *inode){	if (f2fs_is_atomic_file(inode))		return false; 	if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))		return false; 	if (i_size_read(inode) > MAX_INLINE_DATA(inode))		return false; 	if (f2fs_post_read_required(inode))		return false; 	return true;} bool f2fs_may_inline_dentry(struct inode *inode){	if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))		return false; 	if (!S_ISDIR(inode->i_mode))		return false; 	return true;} void f2fs_do_read_inline_data(struct page *page, struct page *ipage){	struct inode *inode = page->mapping->host;	void *src_addr, *dst_addr; 	if (PageUptodate(page))		return; 	f2fs_bug_on(F2FS_P_SB(page), page->index); 	zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE); 	/* Copy the whole inline data block */	src_addr = inline_data_addr(inode, ipage);	dst_addr = kmap_atomic(page);	memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));	flush_dcache_page(page);	kunmap_atomic(dst_addr);	if (!PageUptodate(page))		SetPageUptodate(page);} void f2fs_truncate_inline_inode(struct inode *inode,					struct page *ipage, u64 from){	void *addr; 	if (from >= MAX_INLINE_DATA(inode))		return; 	addr = inline_data_addr(inode, ipage); 	f2fs_wait_on_page_writeback(ipage, NODE, true, true);	memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);	set_page_dirty(ipage); 	if (from == 0)		clear_inode_flag(inode, FI_DATA_EXIST);} int f2fs_read_inline_data(struct inode *inode, struct page *page){	struct page *ipage; 	ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);	if (IS_ERR(ipage)) {		unlock_page(page);		return PTR_ERR(ipage);	} 	if (!f2fs_has_inline_data(inode)) {		f2fs_put_page(ipage, 1);		return -EAGAIN;	} 	if (page->index)		zero_user_segment(page, 0, PAGE_SIZE);	else		f2fs_do_read_inline_data(page, ipage); 	if (!PageUptodate(page))		SetPageUptodate(page);	f2fs_put_page(ipage, 1);	unlock_page(page);	return 0;} int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page){	struct f2fs_io_info fio = {		.sbi = F2FS_I_SB(dn->inode),		.ino = dn->inode->i_ino,		.type = DATA,		.op = REQ_OP_WRITE,		.op_flags = REQ_SYNC | REQ_PRIO,		.page = page,		.encrypted_page = NULL,		.io_type = FS_DATA_IO,	};	struct node_info ni;	int dirty, err; 	if (!f2fs_exist_data(dn->inode))		goto clear_out; 	err = f2fs_reserve_block(dn, 0);	if (err)		return err; 	err = f2fs_get_node_info(fio.sbi, dn->nid, &ni);	if (err) {		f2fs_truncate_data_blocks_range(dn, 1);		f2fs_put_dnode(dn);		return err;	} 	fio.version = ni.version; 	if (unlikely(dn->data_blkaddr != NEW_ADDR)) {		f2fs_put_dnode(dn);		set_sbi_flag(fio.sbi, SBI_NEED_FSCK);		f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",			  __func__, dn->inode->i_ino, dn->data_blkaddr);		return -EFSCORRUPTED;	} 	f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page)); 	f2fs_do_read_inline_data(page, dn->inode_page);	set_page_dirty(page); 	/* clear dirty state */	dirty = clear_page_dirty_for_io(page); 	/* write data page to try to make data consistent */	set_page_writeback(page);	ClearPageError(page);	fio.old_blkaddr = dn->data_blkaddr;	set_inode_flag(dn->inode, FI_HOT_DATA);	f2fs_outplace_write_data(dn, &fio);	f2fs_wait_on_page_writeback(page, DATA, true, true);	if (dirty) {		inode_dec_dirty_pages(dn->inode);		f2fs_remove_dirty_inode(dn->inode);	} 	/* this converted inline_data should be recovered. */	set_inode_flag(dn->inode, FI_APPEND_WRITE); 	/* clear inline data and flag after data writeback */	f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);	clear_inline_node(dn->inode_page);clear_out:	stat_dec_inline_inode(dn->inode);	clear_inode_flag(dn->inode, FI_INLINE_DATA);	f2fs_put_dnode(dn);	return 0;} int f2fs_convert_inline_inode(struct inode *inode){	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);	struct dnode_of_data dn;	struct page *ipage, *page;	int err = 0; 	if (!f2fs_has_inline_data(inode) ||			f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))		return 0; 	err = dquot_initialize(inode);	if (err)		return err; 	page = f2fs_grab_cache_page(inode->i_mapping, 0, false);	if (!page)		return -ENOMEM; 	f2fs_lock_op(sbi); 	ipage = f2fs_get_node_page(sbi, inode->i_ino);	if (IS_ERR(ipage)) {		err = PTR_ERR(ipage);		goto out;	} 	set_new_dnode(&dn, inode, ipage, ipage, 0); 	if (f2fs_has_inline_data(inode))		err = f2fs_convert_inline_page(&dn, page); 	f2fs_put_dnode(&dn);out:	f2fs_unlock_op(sbi); 	f2fs_put_page(page, 1); 	if (!err)		f2fs_balance_fs(sbi, dn.node_changed); 	return err;} int f2fs_write_inline_data(struct inode *inode, struct page *page){	void *src_addr, *dst_addr;	struct dnode_of_data dn;	int err; 	set_new_dnode(&dn, inode, NULL, NULL, 0);	err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);	if (err)		return err; 	if (!f2fs_has_inline_data(inode)) {		f2fs_put_dnode(&dn);		return -EAGAIN;	} 	f2fs_bug_on(F2FS_I_SB(inode), page->index); 	f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);	src_addr = kmap_atomic(page);	dst_addr = inline_data_addr(inode, dn.inode_page);	memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));	kunmap_atomic(src_addr);	set_page_dirty(dn.inode_page); 	f2fs_clear_page_cache_dirty_tag(page); 	set_inode_flag(inode, FI_APPEND_WRITE);	set_inode_flag(inode, FI_DATA_EXIST); 	clear_inline_node(dn.inode_page);	f2fs_put_dnode(&dn);	return 0;} int f2fs_recover_inline_data(struct inode *inode, struct page *npage){	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);	struct f2fs_inode *ri = NULL;	void *src_addr, *dst_addr;	struct page *ipage; 	/*	 * The inline_data recovery policy is as follows.	 * [prev.] [next] of inline_data flag	 *    o       o  -> recover inline_data	 *    o       x  -> remove inline_data, and then recover data blocks	 *    x       o  -> remove data blocks, and then recover inline_data	 *    x       x  -> recover data blocks	 */	if (IS_INODE(npage))		ri = F2FS_INODE(npage); 	if (f2fs_has_inline_data(inode) &&			ri && (ri->i_inline & F2FS_INLINE_DATA)) {process_inline:		ipage = f2fs_get_node_page(sbi, inode->i_ino);		if (IS_ERR(ipage))			return PTR_ERR(ipage); 		f2fs_wait_on_page_writeback(ipage, NODE, true, true); 		src_addr = inline_data_addr(inode, npage);		dst_addr = inline_data_addr(inode, ipage);		memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode)); 		set_inode_flag(inode, FI_INLINE_DATA);		set_inode_flag(inode, FI_DATA_EXIST); 		set_page_dirty(ipage);		f2fs_put_page(ipage, 1);		return 1;	} 	if (f2fs_has_inline_data(inode)) {		ipage = f2fs_get_node_page(sbi, inode->i_ino);		if (IS_ERR(ipage))			return PTR_ERR(ipage);		f2fs_truncate_inline_inode(inode, ipage, 0);		stat_dec_inline_inode(inode);		clear_inode_flag(inode, FI_INLINE_DATA);		f2fs_put_page(ipage, 1);	} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {		int ret; 		ret = f2fs_truncate_blocks(inode, 0, false);		if (ret)			return ret;		stat_inc_inline_inode(inode);		goto process_inline;	}	return 0;} struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,					const struct f2fs_filename *fname,					struct page **res_page){	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);	struct f2fs_dir_entry *de;	struct f2fs_dentry_ptr d;	struct page *ipage;	void *inline_dentry; 	ipage = f2fs_get_node_page(sbi, dir->i_ino);	if (IS_ERR(ipage)) {		*res_page = ipage;		return NULL;	} 	inline_dentry = inline_data_addr(dir, ipage); 	make_dentry_ptr_inline(dir, &d, inline_dentry);	de = f2fs_find_target_dentry(&d, fname, NULL);	unlock_page(ipage);	if (IS_ERR(de)) {		*res_page = ERR_CAST(de);		de = NULL;	}	if (de)		*res_page = ipage;	else		f2fs_put_page(ipage, 0); 	return de;} int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,							struct page *ipage){	struct f2fs_dentry_ptr d;	void *inline_dentry; 	inline_dentry = inline_data_addr(inode, ipage); 	make_dentry_ptr_inline(inode, &d, inline_dentry);	f2fs_do_make_empty_dir(inode, parent, &d); 	set_page_dirty(ipage); 	/* update i_size to MAX_INLINE_DATA */	if (i_size_read(inode) < MAX_INLINE_DATA(inode))		f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));	return 0;} /* * NOTE: ipage is grabbed by caller, but if any error occurs, we should * release ipage in this function. */static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,							void *inline_dentry){	struct page *page;	struct dnode_of_data dn;	struct f2fs_dentry_block *dentry_blk;	struct f2fs_dentry_ptr src, dst;	int err; 	page = f2fs_grab_cache_page(dir->i_mapping, 0, true);	if (!page) {		f2fs_put_page(ipage, 1);		return -ENOMEM;	} 	set_new_dnode(&dn, dir, ipage, NULL, 0);	err = f2fs_reserve_block(&dn, 0);	if (err)		goto out; 	if (unlikely(dn.data_blkaddr != NEW_ADDR)) {		f2fs_put_dnode(&dn);		set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);		f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",			  __func__, dir->i_ino, dn.data_blkaddr);		err = -EFSCORRUPTED;		goto out;	} 	f2fs_wait_on_page_writeback(page, DATA, true, true); 	dentry_blk = page_address(page); 	make_dentry_ptr_inline(dir, &src, inline_dentry);	make_dentry_ptr_block(dir, &dst, dentry_blk); 	/* copy data from inline dentry block to new dentry block */	memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);	memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);	/*	 * we do not need to zero out remainder part of dentry and filename	 * field, since we have used bitmap for marking the usage status of	 * them, besides, we can also ignore copying/zeroing reserved space	 * of dentry block, because them haven't been used so far.	 */	memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);	memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN); 	if (!PageUptodate(page))		SetPageUptodate(page);	set_page_dirty(page); 	/* clear inline dir and flag after data writeback */	f2fs_truncate_inline_inode(dir, ipage, 0); 	stat_dec_inline_dir(dir);	clear_inode_flag(dir, FI_INLINE_DENTRY); 	/*	 * should retrieve reserved space which was used to keep	 * inline_dentry's structure for backward compatibility.	 */	if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&			!f2fs_has_inline_xattr(dir))		F2FS_I(dir)->i_inline_xattr_size = 0; 	f2fs_i_depth_write(dir, 1);	if (i_size_read(dir) < PAGE_SIZE)		f2fs_i_size_write(dir, PAGE_SIZE);out:	f2fs_put_page(page, 1);	return err;} static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry){	struct f2fs_dentry_ptr d;	unsigned long bit_pos = 0;	int err = 0; 	make_dentry_ptr_inline(dir, &d, inline_dentry); 	while (bit_pos < d.max) {		struct f2fs_dir_entry *de;		struct f2fs_filename fname;		nid_t ino;		umode_t fake_mode; 		if (!test_bit_le(bit_pos, d.bitmap)) {			bit_pos++;			continue;		} 		de = &d.dentry[bit_pos]; 		if (unlikely(!de->name_len)) {			bit_pos++;			continue;		} 		/*		 * We only need the disk_name and hash to move the dentry.		 * We don't need the original or casefolded filenames.		 */		memset(&fname, 0, sizeof(fname));		fname.disk_name.name = d.filename[bit_pos];		fname.disk_name.len = le16_to_cpu(de->name_len);		fname.hash = de->hash_code; 		ino = le32_to_cpu(de->ino);		fake_mode = f2fs_get_de_type(de) << S_SHIFT; 		err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);		if (err)			goto punch_dentry_pages; 		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));	}	return 0;punch_dentry_pages:	truncate_inode_pages(&dir->i_data, 0);	f2fs_truncate_blocks(dir, 0, false);	f2fs_remove_dirty_inode(dir);

Lines 1–500 of 801. Load more