Release 4.10 fs/f2fs/checkpoint.c

/*
 * fs/f2fs/checkpoint.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/fs.h>
#include <linux/bio.h>
#include <linux/mpage.h>
#include <linux/writeback.h>
#include <linux/blkdev.h>
#include <linux/f2fs_fs.h>
#include <linux/pagevec.h>
#include <linux/swap.h>

#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "trace.h"
#include <trace/events/f2fs.h>


static struct kmem_cache *ino_entry_slab;

struct kmem_cache *inode_entry_slab;



void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
{
	set_ckpt_flags(sbi, CP_ERROR_FLAG);
	sbi->sb->s_flags |= MS_RDONLY;
	if (!end_io)
		f2fs_flush_merged_bios(sbi);
}

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jaegeuk kim
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38
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/*
 * We guarantee no failure on the returned page.
 */


struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
{
	struct address_space *mapping = META_MAPPING(sbi);
	struct page *page = NULL;
repeat:
	page = f2fs_grab_cache_page(mapping, index, false);
	if (!page) {
		cond_resched();
		goto repeat;
	}
	f2fs_wait_on_page_writeback(page, META, true);
	if (!PageUptodate(page))
		SetPageUptodate(page);
	return page;
}

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jaegeuk kim
80
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5
83.33%
gu zheng
gu zheng
3
3.61%
1
16.67%
Total
83
100.00%
6
100.00%

/*
 * We guarantee no failure on the returned page.
 */


static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
							bool is_meta)
{
	struct address_space *mapping = META_MAPPING(sbi);
	struct page *page;
	struct f2fs_io_info fio = {
		.sbi = sbi,
		.type = META,
		.op = REQ_OP_READ,
		.op_flags = REQ_META | REQ_PRIO,
		.old_blkaddr = index,
		.new_blkaddr = index,
		.encrypted_page = NULL,
        };

	if (unlikely(!is_meta))
		fio.op_flags &= ~REQ_META;
repeat:
	page = f2fs_grab_cache_page(mapping, index, false);
	if (!page) {
		cond_resched();
		goto repeat;
	}
	if (PageUptodate(page))
		goto out;

	fio.page = page;

	if (f2fs_submit_page_bio(&fio)) {
		f2fs_put_page(page, 1);
		goto repeat;
	}

	lock_page(page);
	if (unlikely(page->mapping != mapping)) {
		f2fs_put_page(page, 1);
		goto repeat;
	}

	/*
         * if there is any IO error when accessing device, make our filesystem
         * readonly and make sure do not write checkpoint with non-uptodate
         * meta page.
         */
	if (unlikely(!PageUptodate(page)))
		f2fs_stop_checkpoint(sbi, false);
out:
	return page;
}

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jaegeuk kim
jaegeuk kim
154
74.76%
11
68.75%
chao yu
chao yu
42
20.39%
3
18.75%
michael christie
michael christie
7
3.40%
1
6.25%
gu zheng
gu zheng
3
1.46%
1
6.25%
Total
206
100.00%
16
100.00%



struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
{
	return __get_meta_page(sbi, index, true);
}

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chao yu
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25
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/* for POR only */


struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
{
	return __get_meta_page(sbi, index, false);
}

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chao yu
chao yu
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25
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bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
{
	switch (type) {
	case META_NAT:
		break;
	case META_SIT:
		if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
			return false;
		break;
	case META_SSA:
		if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
			blkaddr < SM_I(sbi)->ssa_blkaddr))
			return false;
		break;
	case META_CP:
		if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
			blkaddr < __start_cp_addr(sbi)))
			return false;
		break;
	case META_POR:
		if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
			blkaddr < MAIN_BLKADDR(sbi)))
			return false;
		break;
	default:
		BUG();
	}

	return true;
}

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chao yu
chao yu
126
94.03%
4
66.67%
jaegeuk kim
jaegeuk kim
8
5.97%
2
33.33%
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134
100.00%
6
100.00%

/*
 * Readahead CP/NAT/SIT/SSA pages
 */


int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
							int type, bool sync)
{
	struct page *page;
	block_t blkno = start;
	struct f2fs_io_info fio = {
		.sbi = sbi,
		.type = META,
		.op = REQ_OP_READ,
		.op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
		.encrypted_page = NULL,
        };
	struct blk_plug plug;

	if (unlikely(type == META_POR))
		fio.op_flags &= ~REQ_META;

	blk_start_plug(&plug);
	for (; nrpages-- > 0; blkno++) {

		if (!is_valid_blkaddr(sbi, blkno, type))
			goto out;

		switch (type) {
		case META_NAT:
			if (unlikely(blkno >=
					NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
				blkno = 0;
			/* get nat block addr */
			fio.new_blkaddr = current_nat_addr(sbi,
					blkno * NAT_ENTRY_PER_BLOCK);
			break;
		case META_SIT:
			/* get sit block addr */
			fio.new_blkaddr = current_sit_addr(sbi,
					blkno * SIT_ENTRY_PER_BLOCK);
			break;
		case META_SSA:
		case META_CP:
		case META_POR:
			fio.new_blkaddr = blkno;
			break;
		default:
			BUG();
		}

		page = f2fs_grab_cache_page(META_MAPPING(sbi),
						fio.new_blkaddr, false);
		if (!page)
			continue;
		if (PageUptodate(page)) {
			f2fs_put_page(page, 1);
			continue;
		}

		fio.page = page;
		fio.old_blkaddr = fio.new_blkaddr;
		f2fs_submit_page_mbio(&fio);
		f2fs_put_page(page, 0);
	}
out:
	f2fs_submit_merged_bio(sbi, META, READ);
	blk_finish_plug(&plug);
	return blkno - start;
}

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chao yu
chao yu
255
86.15%
7
50.00%
jaegeuk kim
jaegeuk kim
33
11.15%
5
35.71%
michael christie
michael christie
7
2.36%
1
7.14%
christoph hellwig
christoph hellwig
1
0.34%
1
7.14%
Total
296
100.00%
14
100.00%



void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
{
	struct page *page;
	bool readahead = false;

	page = find_get_page(META_MAPPING(sbi), index);
	if (!page || !PageUptodate(page))
		readahead = true;
	f2fs_put_page(page, 0);

	if (readahead)
		ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
}

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chao yu
chao yu
73
98.65%
2
66.67%
jaegeuk kim
jaegeuk kim
1
1.35%
1
33.33%
Total
74
100.00%
3
100.00%



static int f2fs_write_meta_page(struct page *page,
				struct writeback_control *wbc)
{
	struct f2fs_sb_info *sbi = F2FS_P_SB(page);

	trace_f2fs_writepage(page, META);

	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
		goto redirty_out;
	if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
		goto redirty_out;
	if (unlikely(f2fs_cp_error(sbi)))
		goto redirty_out;

	write_meta_page(sbi, page);
	dec_page_count(sbi, F2FS_DIRTY_META);

	if (wbc->for_reclaim)
		f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, META, WRITE);

	unlock_page(page);

	if (unlikely(f2fs_cp_error(sbi)))
		f2fs_submit_merged_bio(sbi, META, WRITE);

	return 0;

redirty_out:
	redirty_page_for_writepage(wbc, page);
	return AOP_WRITEPAGE_ACTIVATE;
}

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jaegeuk kim
jaegeuk kim
99
63.87%
10
71.43%
chao yu
chao yu
56
36.13%
4
28.57%
Total
155
100.00%
14
100.00%



static int f2fs_write_meta_pages(struct address_space *mapping,
				struct writeback_control *wbc)
{
	struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
	long diff, written;

	/* collect a number of dirty meta pages and write together */
	if (wbc->for_kupdate ||
		get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
		goto skip_write;

	trace_f2fs_writepages(mapping->host, wbc, META);

	/* if mounting is failed, skip writing node pages */
	mutex_lock(&sbi->cp_mutex);
	diff = nr_pages_to_write(sbi, META, wbc);
	written = sync_meta_pages(sbi, META, wbc->nr_to_write);
	mutex_unlock(&sbi->cp_mutex);
	wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
	return 0;

skip_write:
	wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
	trace_f2fs_writepages(mapping->host, wbc, META);
	return 0;
}

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jaegeuk kim
jaegeuk kim
135
85.99%
5
83.33%
yunlei he
yunlei he
22
14.01%
1
16.67%
Total
157
100.00%
6
100.00%



long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
						long nr_to_write)
{
	struct address_space *mapping = META_MAPPING(sbi);
	pgoff_t index = 0, end = ULONG_MAX, prev = ULONG_MAX;
	struct pagevec pvec;
	long nwritten = 0;
	struct writeback_control wbc = {
		.for_reclaim = 0,
        };
	struct blk_plug plug;

	pagevec_init(&pvec, 0);

	blk_start_plug(&plug);

	while (index <= end) {
		int i, nr_pages;
		nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
				PAGECACHE_TAG_DIRTY,
				min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
		if (unlikely(nr_pages == 0))
			break;

		for (i = 0; i < nr_pages; i++) {
			struct page *page = pvec.pages[i];

			if (prev == ULONG_MAX)
				prev = page->index - 1;
			if (nr_to_write != LONG_MAX && page->index != prev + 1) {
				pagevec_release(&pvec);
				goto stop;
			}

			lock_page(page);

			if (unlikely(page->mapping != mapping)) {
continue_unlock:
				unlock_page(page);
				continue;
			}
			if (!PageDirty(page)) {
				/* someone wrote it for us */
				goto continue_unlock;
			}

			f2fs_wait_on_page_writeback(page, META, true);

			BUG_ON(PageWriteback(page));
			if (!clear_page_dirty_for_io(page))
				goto continue_unlock;

			if (mapping->a_ops->writepage(page, &wbc)) {
				unlock_page(page);
				break;
			}
			nwritten++;
			prev = page->index;
			if (unlikely(nwritten >= nr_to_write))
				break;
		}
		pagevec_release(&pvec);
		cond_resched();
	}
stop:
	if (nwritten)
		f2fs_submit_merged_bio(sbi, type, WRITE);

	blk_finish_plug(&plug);

	return nwritten;
}

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jaegeuk kim
jaegeuk kim
304
89.41%
6
54.55%
chao yu
chao yu
33
9.71%
4
36.36%
gu zheng
gu zheng
3
0.88%
1
9.09%
Total
340
100.00%
11
100.00%



static int f2fs_set_meta_page_dirty(struct page *page)
{
	trace_f2fs_set_page_dirty(page, META);

	if (!PageUptodate(page))
		SetPageUptodate(page);
	if (!PageDirty(page)) {
		f2fs_set_page_dirty_nobuffers(page);
		inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
		SetPagePrivate(page);
		f2fs_trace_pid(page);
		return 1;
	}
	return 0;
}

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jaegeuk kim
67
93.06%
6
85.71%
chao yu
chao yu
5
6.94%
1
14.29%
Total
72
100.00%
7
100.00%


const struct address_space_operations f2fs_meta_aops = {
	.writepage	= f2fs_write_meta_page,
	.writepages	= f2fs_write_meta_pages,
	.set_page_dirty	= f2fs_set_meta_page_dirty,
	.invalidatepage = f2fs_invalidate_page,
	.releasepage	= f2fs_release_page,
#ifdef CONFIG_MIGRATION
	.migratepage    = f2fs_migrate_page,
#endif
};



static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
	struct inode_management *im = &sbi->im[type];
	struct ino_entry *e, *tmp;

	tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
retry:
	radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);

	spin_lock(&im->ino_lock);
	e = radix_tree_lookup(&im->ino_root, ino);
	if (!e) {
		e = tmp;
		if (radix_tree_insert(&im->ino_root, ino, e)) {
			spin_unlock(&im->ino_lock);
			radix_tree_preload_end();
			goto retry;
		}
		memset(e, 0, sizeof(struct ino_entry));
		e->ino = ino;

		list_add_tail(&e->list, &im->ino_list);
		if (type != ORPHAN_INO)
			im->ino_num++;
	}
	spin_unlock(&im->ino_lock);
	radix_tree_preload_end();

	if (e != tmp)
		kmem_cache_free(ino_entry_slab, tmp);
}

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jaegeuk kim
jaegeuk kim
150
81.52%
7
63.64%
chao yu
chao yu
21
11.41%
2
18.18%
gu zheng
gu zheng
13
7.07%
2
18.18%
Total
184
100.00%
11
100.00%



static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
	struct inode_management *im = &sbi->im[type];
	struct ino_entry *e;

	spin_lock(&im->ino_lock);
	e = radix_tree_lookup(&im->ino_root, ino);
	if (e) {
		list_del(&e->list);
		radix_tree_delete(&im->ino_root, ino);
		im->ino_num--;
		spin_unlock(&im->ino_lock);
		kmem_cache_free(ino_entry_slab, e);
		return;
	}
	spin_unlock(&im->ino_lock);
}

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jaegeuk kim
jaegeuk kim
88
81.48%
5
71.43%
chao yu
chao yu
19
17.59%
1
14.29%
gu zheng
gu zheng
1
0.93%
1
14.29%
Total
108
100.00%
7
100.00%



void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
	/* add new dirty ino entry into list */
	__add_ino_entry(sbi, ino, type);
}

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jaegeuk kim
jaegeuk kim
25
96.15%
1
50.00%
chao yu
chao yu
1
3.85%
1
50.00%
Total
26
100.00%
2
100.00%



void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
	/* remove dirty ino entry from list */
	__remove_ino_entry(sbi, ino, type);
}

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jaegeuk kim
jaegeuk kim
25
96.15%
1
50.00%
chao yu
chao yu
1
3.85%
1
50.00%
Total
26
100.00%
2
100.00%

/* mode should be APPEND_INO or UPDATE_INO */


bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
{
	struct inode_management *im = &sbi->im[mode];
	struct ino_entry *e;

	spin_lock(&im->ino_lock);
	e = radix_tree_lookup(&im->ino_root, ino);
	spin_unlock(&im->ino_lock);
	return e ? true : false;
}

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jaegeuk kim
jaegeuk kim
53
76.81%
1
50.00%
chao yu
chao yu
16
23.19%
1
50.00%
Total
69
100.00%
2
100.00%



void release_ino_entry(struct f2fs_sb_info *sbi, bool all)
{
	struct ino_entry *e, *tmp;
	int i;

	for (i = all ? ORPHAN_INO: APPEND_INO; i <= UPDATE_INO; i++) {
		struct inode_management *im = &sbi->im[i];

		spin_lock(&im->ino_lock);
		list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
			list_del(&e->list);
			radix_tree_delete(&im->ino_root, e->ino);
			kmem_cache_free(ino_entry_slab, e);
			im->ino_num--;
		}
		spin_unlock(&im->ino_lock);
	}
}

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jaegeuk kim
jaegeuk kim
98
84.48%
3
60.00%
chao yu
chao yu
18
15.52%
2
40.00%
Total
116
100.00%
5
100.00%



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);

#ifdef CONFIG_F2FS_FAULT_INJECTION
	if (time_to_inject(sbi, FAULT_ORPHAN)) {
		spin_unlock(&im->ino_lock);
		return -ENOSPC;
	}
#endif
	if (unlikely(im->ino_num >= sbi->max_orphans))
		err = -ENOSPC;
	else
		im->ino_num++;
	spin_unlock(&im->ino_lock);

	return err;
}

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jaegeuk kim
jaegeuk kim
80
80.81%
4
66.67%
chao yu
chao yu
19
19.19%
2
33.33%
Total
99
100.00%
6
100.00%



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);
	im->ino_num--;
	spin_unlock(&im->ino_lock);
}

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jaegeuk kim
jaegeuk kim
26
47.27%
6
66.67%
chao yu
chao yu
22
40.00%
2
22.22%
russ w. knize
russ w. knize
7
12.73%
1
11.11%
Total
55
100.00%
9
100.00%



void add_orphan_inode(struct inode *inode)
{
	/* add new orphan ino entry into list */
	__add_ino_entry(F2FS_I_SB(inode), inode->i_ino, ORPHAN_INO);
	update_inode_page(inode);
}

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jaegeuk kim
jaegeuk kim
26
86.67%
5
83.33%
chao yu
chao yu
4
13.33%
1
16.67%
Total
30
100.00%
6
100.00%



void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
{
	/* remove orphan entry from orphan list */
	__remove_ino_entry(sbi, ino, ORPHAN_INO);
}

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jaegeuk kim
jaegeuk kim
23
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3
100.00%
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23
100.00%
3
100.00%



static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
{
	struct inode *inode;
	struct node_info ni;
	int err = acquire_orphan_inode(sbi);

	if (err) {
		set_sbi_flag(sbi, SBI_NEED_FSCK);
		f2fs_msg(sbi->sb, KERN_WARNING,
				"%s: orphan failed (ino=%x), run fsck to fix.",
				__func__, ino);
		return err;
	}

	__add_ino_entry(sbi, ino, ORPHAN_INO);

	inode = f2fs_iget_retry(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);

	get_node_info(sbi, ino, &ni);

	/* ENOMEM was fully retried in f2fs_evict_inode. */
	if (ni.blk_addr != NULL_ADDR) {
		set_sbi_flag(sbi, SBI_NEED_FSCK);
		f2fs_msg(sbi->sb, KERN_WARNING,
			"%s: orphan failed (ino=%x), run fsck to fix.",
				__func__, ino);
		return -EIO;
	}
	__remove_ino_entry(sbi, ino, ORPHAN_INO);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jaegeuk kim
jaegeuk kim
153
84.53%
5
83.33%
chao yu
chao yu
28
15.47%
1
16.67%
Total
181
100.00%
6
100.00%



int recover_orphan_inodes(struct f2fs_sb_info *sbi)
{
	block_t start_blk, orphan_blocks, i, j;
	int err;

	if (!is_set_ckpt_flags(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(sbi, CP_ORPHAN_PRESENT_FLAG);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jaegeuk kim
jaegeuk kim
144
72.73%
2
25.00%
chao yu
chao yu
40
20.20%
3
37.50%
wanpeng li
wanpeng li
10
5.05%
2
25.00%
changman lee
changman lee
4
2.02%
1
12.50%
Total
198
100.00%
8
100.00%



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++]