![Jaegeuk Kim](/assets/img/avatar_default.png)
If an inode has converted inline_data which was written to the disk, we should set its inode flag for further fsync so that this inline_data can be recovered from sudden power off. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
532 lines
12 KiB
C
532 lines
12 KiB
C
/*
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* fs/f2fs/inline.c
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* Copyright (c) 2013, Intel Corporation
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* Authors: Huajun Li <huajun.li@intel.com>
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* Haicheng Li <haicheng.li@intel.com>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/fs.h>
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#include <linux/f2fs_fs.h>
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#include "f2fs.h"
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bool f2fs_may_inline(struct inode *inode)
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{
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if (!test_opt(F2FS_I_SB(inode), INLINE_DATA))
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return false;
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if (f2fs_is_atomic_file(inode))
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return false;
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if (!S_ISREG(inode->i_mode))
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return false;
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if (i_size_read(inode) > MAX_INLINE_DATA)
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return false;
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return true;
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}
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void read_inline_data(struct page *page, struct page *ipage)
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{
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void *src_addr, *dst_addr;
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if (PageUptodate(page))
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return;
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f2fs_bug_on(F2FS_P_SB(page), page->index);
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zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
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/* Copy the whole inline data block */
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src_addr = inline_data_addr(ipage);
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dst_addr = kmap_atomic(page);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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flush_dcache_page(page);
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kunmap_atomic(dst_addr);
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SetPageUptodate(page);
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}
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int f2fs_read_inline_data(struct inode *inode, struct page *page)
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{
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struct page *ipage;
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ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
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if (IS_ERR(ipage)) {
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unlock_page(page);
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return PTR_ERR(ipage);
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}
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if (!f2fs_has_inline_data(inode)) {
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f2fs_put_page(ipage, 1);
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return -EAGAIN;
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}
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if (page->index)
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zero_user_segment(page, 0, PAGE_CACHE_SIZE);
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else
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read_inline_data(page, ipage);
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SetPageUptodate(page);
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f2fs_put_page(ipage, 1);
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unlock_page(page);
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return 0;
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}
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int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
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{
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void *src_addr, *dst_addr;
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block_t new_blk_addr;
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struct f2fs_io_info fio = {
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.type = DATA,
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.rw = WRITE_SYNC | REQ_PRIO,
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};
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int dirty, err;
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f2fs_bug_on(F2FS_I_SB(dn->inode), page->index);
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if (!f2fs_exist_data(dn->inode))
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goto clear_out;
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err = f2fs_reserve_block(dn, 0);
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if (err)
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return err;
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f2fs_wait_on_page_writeback(page, DATA);
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if (PageUptodate(page))
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goto no_update;
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zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
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/* Copy the whole inline data block */
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src_addr = inline_data_addr(dn->inode_page);
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dst_addr = kmap_atomic(page);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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flush_dcache_page(page);
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kunmap_atomic(dst_addr);
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SetPageUptodate(page);
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no_update:
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/* clear dirty state */
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dirty = clear_page_dirty_for_io(page);
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/* write data page to try to make data consistent */
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set_page_writeback(page);
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write_data_page(page, dn, &new_blk_addr, &fio);
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update_extent_cache(new_blk_addr, dn);
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f2fs_wait_on_page_writeback(page, DATA);
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if (dirty)
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inode_dec_dirty_pages(dn->inode);
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/* this converted inline_data should be recovered. */
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set_inode_flag(F2FS_I(dn->inode), FI_APPEND_WRITE);
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/* clear inline data and flag after data writeback */
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truncate_inline_data(dn->inode_page, 0);
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clear_out:
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stat_dec_inline_inode(dn->inode);
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f2fs_clear_inline_inode(dn->inode);
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sync_inode_page(dn);
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f2fs_put_dnode(dn);
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return 0;
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}
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int f2fs_convert_inline_inode(struct inode *inode)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct dnode_of_data dn;
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struct page *ipage, *page;
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int err = 0;
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page = grab_cache_page(inode->i_mapping, 0);
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if (!page)
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return -ENOMEM;
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f2fs_lock_op(sbi);
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ipage = get_node_page(sbi, inode->i_ino);
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if (IS_ERR(ipage)) {
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err = PTR_ERR(ipage);
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goto out;
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}
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set_new_dnode(&dn, inode, ipage, ipage, 0);
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if (f2fs_has_inline_data(inode))
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err = f2fs_convert_inline_page(&dn, page);
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f2fs_put_dnode(&dn);
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out:
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f2fs_unlock_op(sbi);
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f2fs_put_page(page, 1);
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return err;
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}
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int f2fs_write_inline_data(struct inode *inode, struct page *page)
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{
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void *src_addr, *dst_addr;
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struct dnode_of_data dn;
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int err;
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
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if (err)
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return err;
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if (!f2fs_has_inline_data(inode)) {
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f2fs_put_dnode(&dn);
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return -EAGAIN;
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}
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f2fs_bug_on(F2FS_I_SB(inode), page->index);
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f2fs_wait_on_page_writeback(dn.inode_page, NODE);
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src_addr = kmap_atomic(page);
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dst_addr = inline_data_addr(dn.inode_page);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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kunmap_atomic(src_addr);
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set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
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set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
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sync_inode_page(&dn);
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f2fs_put_dnode(&dn);
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return 0;
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}
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void truncate_inline_data(struct page *ipage, u64 from)
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{
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void *addr;
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if (from >= MAX_INLINE_DATA)
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return;
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f2fs_wait_on_page_writeback(ipage, NODE);
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addr = inline_data_addr(ipage);
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memset(addr + from, 0, MAX_INLINE_DATA - from);
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}
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bool recover_inline_data(struct inode *inode, struct page *npage)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct f2fs_inode *ri = NULL;
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void *src_addr, *dst_addr;
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struct page *ipage;
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/*
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* The inline_data recovery policy is as follows.
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* [prev.] [next] of inline_data flag
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* o o -> recover inline_data
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* o x -> remove inline_data, and then recover data blocks
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* x o -> remove inline_data, and then recover inline_data
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* x x -> recover data blocks
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*/
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if (IS_INODE(npage))
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ri = F2FS_INODE(npage);
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if (f2fs_has_inline_data(inode) &&
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ri && (ri->i_inline & F2FS_INLINE_DATA)) {
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process_inline:
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ipage = get_node_page(sbi, inode->i_ino);
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f2fs_bug_on(sbi, IS_ERR(ipage));
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f2fs_wait_on_page_writeback(ipage, NODE);
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src_addr = inline_data_addr(npage);
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dst_addr = inline_data_addr(ipage);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
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set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
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update_inode(inode, ipage);
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f2fs_put_page(ipage, 1);
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return true;
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}
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if (f2fs_has_inline_data(inode)) {
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ipage = get_node_page(sbi, inode->i_ino);
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f2fs_bug_on(sbi, IS_ERR(ipage));
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truncate_inline_data(ipage, 0);
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f2fs_clear_inline_inode(inode);
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update_inode(inode, ipage);
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f2fs_put_page(ipage, 1);
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} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
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truncate_blocks(inode, 0, false);
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goto process_inline;
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}
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return false;
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}
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struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
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struct qstr *name, struct page **res_page)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
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struct f2fs_inline_dentry *inline_dentry;
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struct f2fs_dir_entry *de;
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struct f2fs_dentry_ptr d;
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struct page *ipage;
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ipage = get_node_page(sbi, dir->i_ino);
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if (IS_ERR(ipage))
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return NULL;
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inline_dentry = inline_data_addr(ipage);
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make_dentry_ptr(&d, (void *)inline_dentry, 2);
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de = find_target_dentry(name, NULL, &d);
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unlock_page(ipage);
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if (de)
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*res_page = ipage;
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else
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f2fs_put_page(ipage, 0);
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/*
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* For the most part, it should be a bug when name_len is zero.
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* We stop here for figuring out where the bugs has occurred.
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*/
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f2fs_bug_on(sbi, d.max < 0);
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return de;
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}
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struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir,
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struct page **p)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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struct page *ipage;
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struct f2fs_dir_entry *de;
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struct f2fs_inline_dentry *dentry_blk;
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ipage = get_node_page(sbi, dir->i_ino);
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if (IS_ERR(ipage))
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return NULL;
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dentry_blk = inline_data_addr(ipage);
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de = &dentry_blk->dentry[1];
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*p = ipage;
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unlock_page(ipage);
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return de;
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}
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int make_empty_inline_dir(struct inode *inode, struct inode *parent,
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struct page *ipage)
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{
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struct f2fs_inline_dentry *dentry_blk;
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struct f2fs_dentry_ptr d;
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dentry_blk = inline_data_addr(ipage);
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make_dentry_ptr(&d, (void *)dentry_blk, 2);
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do_make_empty_dir(inode, parent, &d);
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set_page_dirty(ipage);
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/* update i_size to MAX_INLINE_DATA */
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if (i_size_read(inode) < MAX_INLINE_DATA) {
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i_size_write(inode, MAX_INLINE_DATA);
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set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
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}
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return 0;
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}
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static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
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struct f2fs_inline_dentry *inline_dentry)
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{
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struct page *page;
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struct dnode_of_data dn;
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struct f2fs_dentry_block *dentry_blk;
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int err;
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page = grab_cache_page(dir->i_mapping, 0);
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if (!page)
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return -ENOMEM;
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set_new_dnode(&dn, dir, ipage, NULL, 0);
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err = f2fs_reserve_block(&dn, 0);
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if (err)
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goto out;
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f2fs_wait_on_page_writeback(page, DATA);
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zero_user_segment(page, 0, PAGE_CACHE_SIZE);
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dentry_blk = kmap_atomic(page);
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/* copy data from inline dentry block to new dentry block */
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memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
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INLINE_DENTRY_BITMAP_SIZE);
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memcpy(dentry_blk->dentry, inline_dentry->dentry,
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sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
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memcpy(dentry_blk->filename, inline_dentry->filename,
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NR_INLINE_DENTRY * F2FS_SLOT_LEN);
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kunmap_atomic(dentry_blk);
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SetPageUptodate(page);
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set_page_dirty(page);
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/* clear inline dir and flag after data writeback */
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truncate_inline_data(ipage, 0);
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stat_dec_inline_dir(dir);
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clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY);
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if (i_size_read(dir) < PAGE_CACHE_SIZE) {
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i_size_write(dir, PAGE_CACHE_SIZE);
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set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
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}
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sync_inode_page(&dn);
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out:
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f2fs_put_page(page, 1);
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return err;
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}
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int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
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struct inode *inode)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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struct page *ipage;
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unsigned int bit_pos;
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f2fs_hash_t name_hash;
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struct f2fs_dir_entry *de;
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size_t namelen = name->len;
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struct f2fs_inline_dentry *dentry_blk = NULL;
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int slots = GET_DENTRY_SLOTS(namelen);
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struct page *page;
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int err = 0;
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int i;
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name_hash = f2fs_dentry_hash(name);
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ipage = get_node_page(sbi, dir->i_ino);
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if (IS_ERR(ipage))
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return PTR_ERR(ipage);
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dentry_blk = inline_data_addr(ipage);
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bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
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slots, NR_INLINE_DENTRY);
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if (bit_pos >= NR_INLINE_DENTRY) {
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err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
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if (!err)
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err = -EAGAIN;
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goto out;
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}
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down_write(&F2FS_I(inode)->i_sem);
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page = init_inode_metadata(inode, dir, name, ipage);
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if (IS_ERR(page)) {
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err = PTR_ERR(page);
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goto fail;
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}
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f2fs_wait_on_page_writeback(ipage, NODE);
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de = &dentry_blk->dentry[bit_pos];
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de->hash_code = name_hash;
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de->name_len = cpu_to_le16(namelen);
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memcpy(dentry_blk->filename[bit_pos], name->name, name->len);
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de->ino = cpu_to_le32(inode->i_ino);
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set_de_type(de, inode);
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for (i = 0; i < slots; i++)
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test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
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set_page_dirty(ipage);
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/* we don't need to mark_inode_dirty now */
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F2FS_I(inode)->i_pino = dir->i_ino;
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update_inode(inode, page);
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f2fs_put_page(page, 1);
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update_parent_metadata(dir, inode, 0);
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fail:
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up_write(&F2FS_I(inode)->i_sem);
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if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
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update_inode(dir, ipage);
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clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
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}
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out:
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f2fs_put_page(ipage, 1);
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return err;
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}
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void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
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struct inode *dir, struct inode *inode)
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{
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struct f2fs_inline_dentry *inline_dentry;
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int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
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unsigned int bit_pos;
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int i;
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lock_page(page);
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f2fs_wait_on_page_writeback(page, NODE);
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inline_dentry = inline_data_addr(page);
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bit_pos = dentry - inline_dentry->dentry;
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for (i = 0; i < slots; i++)
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test_and_clear_bit_le(bit_pos + i,
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&inline_dentry->dentry_bitmap);
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set_page_dirty(page);
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dir->i_ctime = dir->i_mtime = CURRENT_TIME;
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if (inode)
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f2fs_drop_nlink(dir, inode, page);
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f2fs_put_page(page, 1);
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}
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bool f2fs_empty_inline_dir(struct inode *dir)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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struct page *ipage;
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unsigned int bit_pos = 2;
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struct f2fs_inline_dentry *dentry_blk;
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ipage = get_node_page(sbi, dir->i_ino);
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if (IS_ERR(ipage))
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return false;
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dentry_blk = inline_data_addr(ipage);
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bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
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NR_INLINE_DENTRY,
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bit_pos);
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f2fs_put_page(ipage, 1);
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|
|
|
if (bit_pos < NR_INLINE_DENTRY)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct f2fs_inline_dentry *inline_dentry = NULL;
|
|
struct page *ipage = NULL;
|
|
struct f2fs_dentry_ptr d;
|
|
|
|
if (ctx->pos == NR_INLINE_DENTRY)
|
|
return 0;
|
|
|
|
ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
|
|
if (IS_ERR(ipage))
|
|
return PTR_ERR(ipage);
|
|
|
|
inline_dentry = inline_data_addr(ipage);
|
|
|
|
make_dentry_ptr(&d, (void *)inline_dentry, 2);
|
|
|
|
if (!f2fs_fill_dentries(ctx, &d, 0))
|
|
ctx->pos = NR_INLINE_DENTRY;
|
|
|
|
f2fs_put_page(ipage, 1);
|
|
return 0;
|
|
}
|