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![Jaegeuk Kim](/assets/img/avatar_default.png)
This patch adds time and interval arrays to store some timing variables. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1186 lines
29 KiB
C
1186 lines
29 KiB
C
/*
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* fs/f2fs/checkpoint.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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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/bio.h>
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#include <linux/mpage.h>
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#include <linux/writeback.h>
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#include <linux/blkdev.h>
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#include <linux/f2fs_fs.h>
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#include <linux/pagevec.h>
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#include <linux/swap.h>
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#include "f2fs.h"
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#include "node.h"
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#include "segment.h"
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#include "trace.h"
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#include <trace/events/f2fs.h>
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static struct kmem_cache *ino_entry_slab;
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struct kmem_cache *inode_entry_slab;
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/*
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* We guarantee no failure on the returned page.
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*/
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struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
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{
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struct address_space *mapping = META_MAPPING(sbi);
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struct page *page = NULL;
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repeat:
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page = grab_cache_page(mapping, index);
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if (!page) {
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cond_resched();
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goto repeat;
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}
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f2fs_wait_on_page_writeback(page, META);
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SetPageUptodate(page);
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return page;
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}
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/*
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* We guarantee no failure on the returned page.
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*/
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static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
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bool is_meta)
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{
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struct address_space *mapping = META_MAPPING(sbi);
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struct page *page;
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struct f2fs_io_info fio = {
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.sbi = sbi,
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.type = META,
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.rw = READ_SYNC | REQ_META | REQ_PRIO,
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.blk_addr = index,
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.encrypted_page = NULL,
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};
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if (unlikely(!is_meta))
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fio.rw &= ~REQ_META;
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repeat:
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page = grab_cache_page(mapping, index);
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if (!page) {
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cond_resched();
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goto repeat;
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}
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if (PageUptodate(page))
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goto out;
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fio.page = page;
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if (f2fs_submit_page_bio(&fio)) {
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f2fs_put_page(page, 1);
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goto repeat;
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}
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lock_page(page);
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if (unlikely(page->mapping != mapping)) {
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f2fs_put_page(page, 1);
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goto repeat;
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}
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/*
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* if there is any IO error when accessing device, make our filesystem
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* readonly and make sure do not write checkpoint with non-uptodate
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* meta page.
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*/
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if (unlikely(!PageUptodate(page)))
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f2fs_stop_checkpoint(sbi);
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out:
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return page;
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}
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struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
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{
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return __get_meta_page(sbi, index, true);
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}
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/* for POR only */
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struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
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{
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return __get_meta_page(sbi, index, false);
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}
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bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
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{
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switch (type) {
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case META_NAT:
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break;
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case META_SIT:
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if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
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return false;
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break;
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case META_SSA:
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if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
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blkaddr < SM_I(sbi)->ssa_blkaddr))
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return false;
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break;
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case META_CP:
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if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
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blkaddr < __start_cp_addr(sbi)))
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return false;
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break;
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case META_POR:
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if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
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blkaddr < MAIN_BLKADDR(sbi)))
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return false;
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break;
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default:
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BUG();
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}
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return true;
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}
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/*
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* Readahead CP/NAT/SIT/SSA pages
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*/
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int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
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int type, bool sync)
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{
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block_t prev_blk_addr = 0;
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struct page *page;
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block_t blkno = start;
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struct f2fs_io_info fio = {
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.sbi = sbi,
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.type = META,
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.rw = sync ? (READ_SYNC | REQ_META | REQ_PRIO) : READA,
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.encrypted_page = NULL,
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};
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if (unlikely(type == META_POR))
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fio.rw &= ~REQ_META;
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for (; nrpages-- > 0; blkno++) {
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if (!is_valid_blkaddr(sbi, blkno, type))
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goto out;
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switch (type) {
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case META_NAT:
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if (unlikely(blkno >=
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NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
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blkno = 0;
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/* get nat block addr */
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fio.blk_addr = current_nat_addr(sbi,
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blkno * NAT_ENTRY_PER_BLOCK);
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break;
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case META_SIT:
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/* get sit block addr */
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fio.blk_addr = current_sit_addr(sbi,
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blkno * SIT_ENTRY_PER_BLOCK);
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if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
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goto out;
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prev_blk_addr = fio.blk_addr;
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break;
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case META_SSA:
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case META_CP:
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case META_POR:
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fio.blk_addr = blkno;
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break;
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default:
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BUG();
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}
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page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
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if (!page)
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continue;
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if (PageUptodate(page)) {
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f2fs_put_page(page, 1);
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continue;
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}
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fio.page = page;
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f2fs_submit_page_mbio(&fio);
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f2fs_put_page(page, 0);
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}
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out:
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f2fs_submit_merged_bio(sbi, META, READ);
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return blkno - start;
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}
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void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
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{
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struct page *page;
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bool readahead = false;
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page = find_get_page(META_MAPPING(sbi), index);
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if (!page || (page && !PageUptodate(page)))
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readahead = true;
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f2fs_put_page(page, 0);
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if (readahead)
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ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR, true);
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}
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static int f2fs_write_meta_page(struct page *page,
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struct writeback_control *wbc)
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{
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struct f2fs_sb_info *sbi = F2FS_P_SB(page);
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trace_f2fs_writepage(page, META);
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if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
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goto redirty_out;
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if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
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goto redirty_out;
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if (unlikely(f2fs_cp_error(sbi)))
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goto redirty_out;
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f2fs_wait_on_page_writeback(page, META);
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write_meta_page(sbi, page);
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dec_page_count(sbi, F2FS_DIRTY_META);
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unlock_page(page);
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if (wbc->for_reclaim || unlikely(f2fs_cp_error(sbi)))
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f2fs_submit_merged_bio(sbi, META, WRITE);
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return 0;
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redirty_out:
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redirty_page_for_writepage(wbc, page);
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return AOP_WRITEPAGE_ACTIVATE;
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}
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static int f2fs_write_meta_pages(struct address_space *mapping,
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struct writeback_control *wbc)
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{
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struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
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long diff, written;
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trace_f2fs_writepages(mapping->host, wbc, META);
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/* collect a number of dirty meta pages and write together */
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if (wbc->for_kupdate ||
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get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
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goto skip_write;
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/* if mounting is failed, skip writing node pages */
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mutex_lock(&sbi->cp_mutex);
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diff = nr_pages_to_write(sbi, META, wbc);
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written = sync_meta_pages(sbi, META, wbc->nr_to_write);
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mutex_unlock(&sbi->cp_mutex);
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wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
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return 0;
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skip_write:
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wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
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return 0;
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}
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long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
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long nr_to_write)
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{
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struct address_space *mapping = META_MAPPING(sbi);
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pgoff_t index = 0, end = LONG_MAX, prev = LONG_MAX;
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struct pagevec pvec;
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long nwritten = 0;
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struct writeback_control wbc = {
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.for_reclaim = 0,
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};
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pagevec_init(&pvec, 0);
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while (index <= end) {
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int i, nr_pages;
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nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
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PAGECACHE_TAG_DIRTY,
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min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
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if (unlikely(nr_pages == 0))
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break;
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for (i = 0; i < nr_pages; i++) {
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struct page *page = pvec.pages[i];
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if (prev == LONG_MAX)
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prev = page->index - 1;
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if (nr_to_write != LONG_MAX && page->index != prev + 1) {
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pagevec_release(&pvec);
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goto stop;
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}
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lock_page(page);
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if (unlikely(page->mapping != mapping)) {
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continue_unlock:
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unlock_page(page);
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continue;
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}
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if (!PageDirty(page)) {
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/* someone wrote it for us */
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goto continue_unlock;
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}
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if (!clear_page_dirty_for_io(page))
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goto continue_unlock;
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if (mapping->a_ops->writepage(page, &wbc)) {
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unlock_page(page);
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break;
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}
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nwritten++;
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prev = page->index;
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if (unlikely(nwritten >= nr_to_write))
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break;
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}
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pagevec_release(&pvec);
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cond_resched();
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}
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stop:
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if (nwritten)
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f2fs_submit_merged_bio(sbi, type, WRITE);
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return nwritten;
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}
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static int f2fs_set_meta_page_dirty(struct page *page)
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{
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trace_f2fs_set_page_dirty(page, META);
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SetPageUptodate(page);
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if (!PageDirty(page)) {
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__set_page_dirty_nobuffers(page);
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inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
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SetPagePrivate(page);
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f2fs_trace_pid(page);
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return 1;
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}
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return 0;
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}
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const struct address_space_operations f2fs_meta_aops = {
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.writepage = f2fs_write_meta_page,
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.writepages = f2fs_write_meta_pages,
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.set_page_dirty = f2fs_set_meta_page_dirty,
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.invalidatepage = f2fs_invalidate_page,
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.releasepage = f2fs_release_page,
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};
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static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
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{
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struct inode_management *im = &sbi->im[type];
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struct ino_entry *e, *tmp;
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tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
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retry:
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radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
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spin_lock(&im->ino_lock);
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e = radix_tree_lookup(&im->ino_root, ino);
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if (!e) {
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e = tmp;
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if (radix_tree_insert(&im->ino_root, ino, e)) {
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spin_unlock(&im->ino_lock);
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radix_tree_preload_end();
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goto retry;
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}
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memset(e, 0, sizeof(struct ino_entry));
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e->ino = ino;
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list_add_tail(&e->list, &im->ino_list);
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if (type != ORPHAN_INO)
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im->ino_num++;
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}
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spin_unlock(&im->ino_lock);
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radix_tree_preload_end();
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if (e != tmp)
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kmem_cache_free(ino_entry_slab, tmp);
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}
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static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
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{
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struct inode_management *im = &sbi->im[type];
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struct ino_entry *e;
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spin_lock(&im->ino_lock);
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e = radix_tree_lookup(&im->ino_root, ino);
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if (e) {
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list_del(&e->list);
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radix_tree_delete(&im->ino_root, ino);
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im->ino_num--;
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spin_unlock(&im->ino_lock);
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kmem_cache_free(ino_entry_slab, e);
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return;
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}
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spin_unlock(&im->ino_lock);
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}
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void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
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{
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/* add new dirty ino entry into list */
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__add_ino_entry(sbi, ino, type);
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}
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|
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void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
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{
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/* remove dirty ino entry from list */
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__remove_ino_entry(sbi, ino, type);
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}
|
|
|
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/* mode should be APPEND_INO or UPDATE_INO */
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bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
|
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{
|
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struct inode_management *im = &sbi->im[mode];
|
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struct ino_entry *e;
|
|
|
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spin_lock(&im->ino_lock);
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e = radix_tree_lookup(&im->ino_root, ino);
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spin_unlock(&im->ino_lock);
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return e ? true : false;
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}
|
|
|
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void release_ino_entry(struct f2fs_sb_info *sbi)
|
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{
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struct ino_entry *e, *tmp;
|
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int i;
|
|
|
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for (i = APPEND_INO; i <= UPDATE_INO; i++) {
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struct inode_management *im = &sbi->im[i];
|
|
|
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spin_lock(&im->ino_lock);
|
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list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
|
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list_del(&e->list);
|
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radix_tree_delete(&im->ino_root, e->ino);
|
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kmem_cache_free(ino_entry_slab, e);
|
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im->ino_num--;
|
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}
|
|
spin_unlock(&im->ino_lock);
|
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}
|
|
}
|
|
|
|
int acquire_orphan_inode(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct inode_management *im = &sbi->im[ORPHAN_INO];
|
|
int err = 0;
|
|
|
|
spin_lock(&im->ino_lock);
|
|
if (unlikely(im->ino_num >= sbi->max_orphans))
|
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err = -ENOSPC;
|
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else
|
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im->ino_num++;
|
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spin_unlock(&im->ino_lock);
|
|
|
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return err;
|
|
}
|
|
|
|
void release_orphan_inode(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct inode_management *im = &sbi->im[ORPHAN_INO];
|
|
|
|
spin_lock(&im->ino_lock);
|
|
f2fs_bug_on(sbi, im->ino_num == 0);
|
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im->ino_num--;
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spin_unlock(&im->ino_lock);
|
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}
|
|
|
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void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
|
|
{
|
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/* add new orphan ino entry into list */
|
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__add_ino_entry(sbi, ino, ORPHAN_INO);
|
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}
|
|
|
|
void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
|
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{
|
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/* remove orphan entry from orphan list */
|
|
__remove_ino_entry(sbi, ino, ORPHAN_INO);
|
|
}
|
|
|
|
static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
|
|
{
|
|
struct inode *inode;
|
|
|
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inode = f2fs_iget(sbi->sb, ino);
|
|
if (IS_ERR(inode)) {
|
|
/*
|
|
* there should be a bug that we can't find the entry
|
|
* to orphan inode.
|
|
*/
|
|
f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
|
|
return PTR_ERR(inode);
|
|
}
|
|
|
|
clear_nlink(inode);
|
|
|
|
/* truncate all the data during iput */
|
|
iput(inode);
|
|
return 0;
|
|
}
|
|
|
|
int recover_orphan_inodes(struct f2fs_sb_info *sbi)
|
|
{
|
|
block_t start_blk, orphan_blocks, i, j;
|
|
int err;
|
|
|
|
if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
|
|
return 0;
|
|
|
|
start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
|
|
orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
|
|
|
|
ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
|
|
|
|
for (i = 0; i < orphan_blocks; i++) {
|
|
struct page *page = get_meta_page(sbi, start_blk + i);
|
|
struct f2fs_orphan_block *orphan_blk;
|
|
|
|
orphan_blk = (struct f2fs_orphan_block *)page_address(page);
|
|
for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
|
|
nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
|
|
err = recover_orphan_inode(sbi, ino);
|
|
if (err) {
|
|
f2fs_put_page(page, 1);
|
|
return err;
|
|
}
|
|
}
|
|
f2fs_put_page(page, 1);
|
|
}
|
|
/* clear Orphan Flag */
|
|
clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
|
|
return 0;
|
|
}
|
|
|
|
static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
|
|
{
|
|
struct list_head *head;
|
|
struct f2fs_orphan_block *orphan_blk = NULL;
|
|
unsigned int nentries = 0;
|
|
unsigned short index = 1;
|
|
unsigned short orphan_blocks;
|
|
struct page *page = NULL;
|
|
struct ino_entry *orphan = NULL;
|
|
struct inode_management *im = &sbi->im[ORPHAN_INO];
|
|
|
|
orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
|
|
|
|
/*
|
|
* we don't need to do spin_lock(&im->ino_lock) here, since all the
|
|
* orphan inode operations are covered under f2fs_lock_op().
|
|
* And, spin_lock should be avoided due to page operations below.
|
|
*/
|
|
head = &im->ino_list;
|
|
|
|
/* loop for each orphan inode entry and write them in Jornal block */
|
|
list_for_each_entry(orphan, head, list) {
|
|
if (!page) {
|
|
page = grab_meta_page(sbi, start_blk++);
|
|
orphan_blk =
|
|
(struct f2fs_orphan_block *)page_address(page);
|
|
memset(orphan_blk, 0, sizeof(*orphan_blk));
|
|
}
|
|
|
|
orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
|
|
|
|
if (nentries == F2FS_ORPHANS_PER_BLOCK) {
|
|
/*
|
|
* an orphan block is full of 1020 entries,
|
|
* then we need to flush current orphan blocks
|
|
* and bring another one in memory
|
|
*/
|
|
orphan_blk->blk_addr = cpu_to_le16(index);
|
|
orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
|
|
orphan_blk->entry_count = cpu_to_le32(nentries);
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
index++;
|
|
nentries = 0;
|
|
page = NULL;
|
|
}
|
|
}
|
|
|
|
if (page) {
|
|
orphan_blk->blk_addr = cpu_to_le16(index);
|
|
orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
|
|
orphan_blk->entry_count = cpu_to_le32(nentries);
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
}
|
|
}
|
|
|
|
static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
|
|
block_t cp_addr, unsigned long long *version)
|
|
{
|
|
struct page *cp_page_1, *cp_page_2 = NULL;
|
|
unsigned long blk_size = sbi->blocksize;
|
|
struct f2fs_checkpoint *cp_block;
|
|
unsigned long long cur_version = 0, pre_version = 0;
|
|
size_t crc_offset;
|
|
__u32 crc = 0;
|
|
|
|
/* Read the 1st cp block in this CP pack */
|
|
cp_page_1 = get_meta_page(sbi, cp_addr);
|
|
|
|
/* get the version number */
|
|
cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
|
|
crc_offset = le32_to_cpu(cp_block->checksum_offset);
|
|
if (crc_offset >= blk_size)
|
|
goto invalid_cp1;
|
|
|
|
crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
|
|
if (!f2fs_crc_valid(crc, cp_block, crc_offset))
|
|
goto invalid_cp1;
|
|
|
|
pre_version = cur_cp_version(cp_block);
|
|
|
|
/* Read the 2nd cp block in this CP pack */
|
|
cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
|
|
cp_page_2 = get_meta_page(sbi, cp_addr);
|
|
|
|
cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
|
|
crc_offset = le32_to_cpu(cp_block->checksum_offset);
|
|
if (crc_offset >= blk_size)
|
|
goto invalid_cp2;
|
|
|
|
crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
|
|
if (!f2fs_crc_valid(crc, cp_block, crc_offset))
|
|
goto invalid_cp2;
|
|
|
|
cur_version = cur_cp_version(cp_block);
|
|
|
|
if (cur_version == pre_version) {
|
|
*version = cur_version;
|
|
f2fs_put_page(cp_page_2, 1);
|
|
return cp_page_1;
|
|
}
|
|
invalid_cp2:
|
|
f2fs_put_page(cp_page_2, 1);
|
|
invalid_cp1:
|
|
f2fs_put_page(cp_page_1, 1);
|
|
return NULL;
|
|
}
|
|
|
|
int get_valid_checkpoint(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct f2fs_checkpoint *cp_block;
|
|
struct f2fs_super_block *fsb = sbi->raw_super;
|
|
struct page *cp1, *cp2, *cur_page;
|
|
unsigned long blk_size = sbi->blocksize;
|
|
unsigned long long cp1_version = 0, cp2_version = 0;
|
|
unsigned long long cp_start_blk_no;
|
|
unsigned int cp_blks = 1 + __cp_payload(sbi);
|
|
block_t cp_blk_no;
|
|
int i;
|
|
|
|
sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
|
|
if (!sbi->ckpt)
|
|
return -ENOMEM;
|
|
/*
|
|
* Finding out valid cp block involves read both
|
|
* sets( cp pack1 and cp pack 2)
|
|
*/
|
|
cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
|
|
cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
|
|
|
|
/* The second checkpoint pack should start at the next segment */
|
|
cp_start_blk_no += ((unsigned long long)1) <<
|
|
le32_to_cpu(fsb->log_blocks_per_seg);
|
|
cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
|
|
|
|
if (cp1 && cp2) {
|
|
if (ver_after(cp2_version, cp1_version))
|
|
cur_page = cp2;
|
|
else
|
|
cur_page = cp1;
|
|
} else if (cp1) {
|
|
cur_page = cp1;
|
|
} else if (cp2) {
|
|
cur_page = cp2;
|
|
} else {
|
|
goto fail_no_cp;
|
|
}
|
|
|
|
cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
|
|
memcpy(sbi->ckpt, cp_block, blk_size);
|
|
|
|
if (cp_blks <= 1)
|
|
goto done;
|
|
|
|
cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
|
|
if (cur_page == cp2)
|
|
cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
|
|
|
|
for (i = 1; i < cp_blks; i++) {
|
|
void *sit_bitmap_ptr;
|
|
unsigned char *ckpt = (unsigned char *)sbi->ckpt;
|
|
|
|
cur_page = get_meta_page(sbi, cp_blk_no + i);
|
|
sit_bitmap_ptr = page_address(cur_page);
|
|
memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
|
|
f2fs_put_page(cur_page, 1);
|
|
}
|
|
done:
|
|
f2fs_put_page(cp1, 1);
|
|
f2fs_put_page(cp2, 1);
|
|
return 0;
|
|
|
|
fail_no_cp:
|
|
kfree(sbi->ckpt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void __add_dirty_inode(struct inode *inode, enum inode_type type)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
|
|
|
|
if (is_inode_flag_set(fi, flag))
|
|
return;
|
|
|
|
set_inode_flag(fi, flag);
|
|
list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
|
|
stat_inc_dirty_inode(sbi, type);
|
|
}
|
|
|
|
static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
|
|
{
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
|
|
|
|
if (get_dirty_pages(inode) ||
|
|
!is_inode_flag_set(F2FS_I(inode), flag))
|
|
return;
|
|
|
|
list_del_init(&fi->dirty_list);
|
|
clear_inode_flag(fi, flag);
|
|
stat_dec_dirty_inode(F2FS_I_SB(inode), type);
|
|
}
|
|
|
|
void update_dirty_page(struct inode *inode, struct page *page)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
|
|
|
|
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
|
!S_ISLNK(inode->i_mode))
|
|
return;
|
|
|
|
spin_lock(&sbi->inode_lock[type]);
|
|
__add_dirty_inode(inode, type);
|
|
inode_inc_dirty_pages(inode);
|
|
spin_unlock(&sbi->inode_lock[type]);
|
|
|
|
SetPagePrivate(page);
|
|
f2fs_trace_pid(page);
|
|
}
|
|
|
|
void add_dirty_dir_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
|
|
spin_lock(&sbi->inode_lock[DIR_INODE]);
|
|
__add_dirty_inode(inode, DIR_INODE);
|
|
spin_unlock(&sbi->inode_lock[DIR_INODE]);
|
|
}
|
|
|
|
void remove_dirty_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
|
|
|
|
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
|
!S_ISLNK(inode->i_mode))
|
|
return;
|
|
|
|
spin_lock(&sbi->inode_lock[type]);
|
|
__remove_dirty_inode(inode, type);
|
|
spin_unlock(&sbi->inode_lock[type]);
|
|
|
|
/* Only from the recovery routine */
|
|
if (is_inode_flag_set(fi, FI_DELAY_IPUT)) {
|
|
clear_inode_flag(fi, FI_DELAY_IPUT);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
|
|
{
|
|
struct list_head *head;
|
|
struct inode *inode;
|
|
struct f2fs_inode_info *fi;
|
|
bool is_dir = (type == DIR_INODE);
|
|
|
|
trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
|
|
get_pages(sbi, is_dir ?
|
|
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
|
|
retry:
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
spin_lock(&sbi->inode_lock[type]);
|
|
|
|
head = &sbi->inode_list[type];
|
|
if (list_empty(head)) {
|
|
spin_unlock(&sbi->inode_lock[type]);
|
|
trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
|
|
get_pages(sbi, is_dir ?
|
|
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
|
|
return 0;
|
|
}
|
|
fi = list_entry(head->next, struct f2fs_inode_info, dirty_list);
|
|
inode = igrab(&fi->vfs_inode);
|
|
spin_unlock(&sbi->inode_lock[type]);
|
|
if (inode) {
|
|
filemap_fdatawrite(inode->i_mapping);
|
|
iput(inode);
|
|
} else {
|
|
/*
|
|
* We should submit bio, since it exists several
|
|
* wribacking dentry pages in the freeing inode.
|
|
*/
|
|
f2fs_submit_merged_bio(sbi, DATA, WRITE);
|
|
cond_resched();
|
|
}
|
|
goto retry;
|
|
}
|
|
|
|
/*
|
|
* Freeze all the FS-operations for checkpoint.
|
|
*/
|
|
static int block_operations(struct f2fs_sb_info *sbi)
|
|
{
|
|
struct writeback_control wbc = {
|
|
.sync_mode = WB_SYNC_ALL,
|
|
.nr_to_write = LONG_MAX,
|
|
.for_reclaim = 0,
|
|
};
|
|
struct blk_plug plug;
|
|
int err = 0;
|
|
|
|
blk_start_plug(&plug);
|
|
|
|
retry_flush_dents:
|
|
f2fs_lock_all(sbi);
|
|
/* write all the dirty dentry pages */
|
|
if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
|
|
f2fs_unlock_all(sbi);
|
|
err = sync_dirty_inodes(sbi, DIR_INODE);
|
|
if (err)
|
|
goto out;
|
|
goto retry_flush_dents;
|
|
}
|
|
|
|
/*
|
|
* POR: we should ensure that there are no dirty node pages
|
|
* until finishing nat/sit flush.
|
|
*/
|
|
retry_flush_nodes:
|
|
down_write(&sbi->node_write);
|
|
|
|
if (get_pages(sbi, F2FS_DIRTY_NODES)) {
|
|
up_write(&sbi->node_write);
|
|
err = sync_node_pages(sbi, 0, &wbc);
|
|
if (err) {
|
|
f2fs_unlock_all(sbi);
|
|
goto out;
|
|
}
|
|
goto retry_flush_nodes;
|
|
}
|
|
out:
|
|
blk_finish_plug(&plug);
|
|
return err;
|
|
}
|
|
|
|
static void unblock_operations(struct f2fs_sb_info *sbi)
|
|
{
|
|
up_write(&sbi->node_write);
|
|
f2fs_unlock_all(sbi);
|
|
}
|
|
|
|
static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
|
|
{
|
|
DEFINE_WAIT(wait);
|
|
|
|
for (;;) {
|
|
prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
|
|
|
|
if (!get_pages(sbi, F2FS_WRITEBACK))
|
|
break;
|
|
|
|
io_schedule();
|
|
}
|
|
finish_wait(&sbi->cp_wait, &wait);
|
|
}
|
|
|
|
static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
|
|
{
|
|
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
|
|
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
|
|
struct f2fs_nm_info *nm_i = NM_I(sbi);
|
|
unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
|
|
nid_t last_nid = nm_i->next_scan_nid;
|
|
block_t start_blk;
|
|
unsigned int data_sum_blocks, orphan_blocks;
|
|
__u32 crc32 = 0;
|
|
int i;
|
|
int cp_payload_blks = __cp_payload(sbi);
|
|
block_t discard_blk = NEXT_FREE_BLKADDR(sbi, curseg);
|
|
bool invalidate = false;
|
|
|
|
/*
|
|
* This avoids to conduct wrong roll-forward operations and uses
|
|
* metapages, so should be called prior to sync_meta_pages below.
|
|
*/
|
|
if (discard_next_dnode(sbi, discard_blk))
|
|
invalidate = true;
|
|
|
|
/* Flush all the NAT/SIT pages */
|
|
while (get_pages(sbi, F2FS_DIRTY_META)) {
|
|
sync_meta_pages(sbi, META, LONG_MAX);
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
}
|
|
|
|
next_free_nid(sbi, &last_nid);
|
|
|
|
/*
|
|
* modify checkpoint
|
|
* version number is already updated
|
|
*/
|
|
ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
|
|
ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
|
|
ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
|
|
for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
|
|
ckpt->cur_node_segno[i] =
|
|
cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
|
|
ckpt->cur_node_blkoff[i] =
|
|
cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
|
|
ckpt->alloc_type[i + CURSEG_HOT_NODE] =
|
|
curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
|
|
}
|
|
for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
|
|
ckpt->cur_data_segno[i] =
|
|
cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
|
|
ckpt->cur_data_blkoff[i] =
|
|
cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
|
|
ckpt->alloc_type[i + CURSEG_HOT_DATA] =
|
|
curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
|
|
}
|
|
|
|
ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
|
|
ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
|
|
ckpt->next_free_nid = cpu_to_le32(last_nid);
|
|
|
|
/* 2 cp + n data seg summary + orphan inode blocks */
|
|
data_sum_blocks = npages_for_summary_flush(sbi, false);
|
|
if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
|
|
set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
|
|
else
|
|
clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
|
|
|
|
orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
|
|
ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
|
|
orphan_blocks);
|
|
|
|
if (__remain_node_summaries(cpc->reason))
|
|
ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
|
|
cp_payload_blks + data_sum_blocks +
|
|
orphan_blocks + NR_CURSEG_NODE_TYPE);
|
|
else
|
|
ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
|
|
cp_payload_blks + data_sum_blocks +
|
|
orphan_blocks);
|
|
|
|
if (cpc->reason == CP_UMOUNT)
|
|
set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
|
|
else
|
|
clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
|
|
|
|
if (cpc->reason == CP_FASTBOOT)
|
|
set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
|
|
else
|
|
clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
|
|
|
|
if (orphan_num)
|
|
set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
|
|
else
|
|
clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
|
|
|
|
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
|
|
set_ckpt_flags(ckpt, CP_FSCK_FLAG);
|
|
|
|
/* update SIT/NAT bitmap */
|
|
get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
|
|
get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
|
|
|
|
crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
|
|
*((__le32 *)((unsigned char *)ckpt +
|
|
le32_to_cpu(ckpt->checksum_offset)))
|
|
= cpu_to_le32(crc32);
|
|
|
|
start_blk = __start_cp_addr(sbi);
|
|
|
|
/* need to wait for end_io results */
|
|
wait_on_all_pages_writeback(sbi);
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
/* write out checkpoint buffer at block 0 */
|
|
update_meta_page(sbi, ckpt, start_blk++);
|
|
|
|
for (i = 1; i < 1 + cp_payload_blks; i++)
|
|
update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
|
|
start_blk++);
|
|
|
|
if (orphan_num) {
|
|
write_orphan_inodes(sbi, start_blk);
|
|
start_blk += orphan_blocks;
|
|
}
|
|
|
|
write_data_summaries(sbi, start_blk);
|
|
start_blk += data_sum_blocks;
|
|
if (__remain_node_summaries(cpc->reason)) {
|
|
write_node_summaries(sbi, start_blk);
|
|
start_blk += NR_CURSEG_NODE_TYPE;
|
|
}
|
|
|
|
/* writeout checkpoint block */
|
|
update_meta_page(sbi, ckpt, start_blk);
|
|
|
|
/* wait for previous submitted node/meta pages writeback */
|
|
wait_on_all_pages_writeback(sbi);
|
|
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
|
|
filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
|
|
|
|
/* update user_block_counts */
|
|
sbi->last_valid_block_count = sbi->total_valid_block_count;
|
|
sbi->alloc_valid_block_count = 0;
|
|
|
|
/* Here, we only have one bio having CP pack */
|
|
sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
|
|
|
|
/* wait for previous submitted meta pages writeback */
|
|
wait_on_all_pages_writeback(sbi);
|
|
|
|
/*
|
|
* invalidate meta page which is used temporarily for zeroing out
|
|
* block at the end of warm node chain.
|
|
*/
|
|
if (invalidate)
|
|
invalidate_mapping_pages(META_MAPPING(sbi), discard_blk,
|
|
discard_blk);
|
|
|
|
release_ino_entry(sbi);
|
|
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
clear_prefree_segments(sbi, cpc);
|
|
clear_sbi_flag(sbi, SBI_IS_DIRTY);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We guarantee that this checkpoint procedure will not fail.
|
|
*/
|
|
int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
|
|
{
|
|
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
|
|
unsigned long long ckpt_ver;
|
|
int err = 0;
|
|
|
|
mutex_lock(&sbi->cp_mutex);
|
|
|
|
if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
|
|
(cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
|
|
(cpc->reason == CP_DISCARD && !sbi->discard_blks)))
|
|
goto out;
|
|
if (unlikely(f2fs_cp_error(sbi))) {
|
|
err = -EIO;
|
|
goto out;
|
|
}
|
|
if (f2fs_readonly(sbi->sb)) {
|
|
err = -EROFS;
|
|
goto out;
|
|
}
|
|
|
|
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
|
|
|
|
err = block_operations(sbi);
|
|
if (err)
|
|
goto out;
|
|
|
|
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
|
|
|
|
f2fs_submit_merged_bio(sbi, DATA, WRITE);
|
|
f2fs_submit_merged_bio(sbi, NODE, WRITE);
|
|
f2fs_submit_merged_bio(sbi, META, WRITE);
|
|
|
|
/*
|
|
* update checkpoint pack index
|
|
* Increase the version number so that
|
|
* SIT entries and seg summaries are written at correct place
|
|
*/
|
|
ckpt_ver = cur_cp_version(ckpt);
|
|
ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
|
|
|
|
/* write cached NAT/SIT entries to NAT/SIT area */
|
|
flush_nat_entries(sbi);
|
|
flush_sit_entries(sbi, cpc);
|
|
|
|
/* unlock all the fs_lock[] in do_checkpoint() */
|
|
err = do_checkpoint(sbi, cpc);
|
|
|
|
unblock_operations(sbi);
|
|
stat_inc_cp_count(sbi->stat_info);
|
|
|
|
if (cpc->reason == CP_RECOVERY)
|
|
f2fs_msg(sbi->sb, KERN_NOTICE,
|
|
"checkpoint: version = %llx", ckpt_ver);
|
|
|
|
/* do checkpoint periodically */
|
|
f2fs_update_time(sbi, CP_TIME);
|
|
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
|
|
out:
|
|
mutex_unlock(&sbi->cp_mutex);
|
|
return err;
|
|
}
|
|
|
|
void init_ino_entry_info(struct f2fs_sb_info *sbi)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_INO_ENTRY; i++) {
|
|
struct inode_management *im = &sbi->im[i];
|
|
|
|
INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
|
|
spin_lock_init(&im->ino_lock);
|
|
INIT_LIST_HEAD(&im->ino_list);
|
|
im->ino_num = 0;
|
|
}
|
|
|
|
sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
|
|
NR_CURSEG_TYPE - __cp_payload(sbi)) *
|
|
F2FS_ORPHANS_PER_BLOCK;
|
|
}
|
|
|
|
int __init create_checkpoint_caches(void)
|
|
{
|
|
ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
|
|
sizeof(struct ino_entry));
|
|
if (!ino_entry_slab)
|
|
return -ENOMEM;
|
|
inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
|
|
sizeof(struct inode_entry));
|
|
if (!inode_entry_slab) {
|
|
kmem_cache_destroy(ino_entry_slab);
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void destroy_checkpoint_caches(void)
|
|
{
|
|
kmem_cache_destroy(ino_entry_slab);
|
|
kmem_cache_destroy(inode_entry_slab);
|
|
}
|