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f2fs: fix to read source block before invalidating it

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f2fs_allocate_data_block() invalidates old block address and enable new block
address. Then, if we try to read old block by f2fs_submit_page_bio(), it will
give WARN due to reading invalid blocks.

Let's make the order sanely back.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2019-07-17 18:31:53 -07:00
parent d5e5efa250
commit 543b8c468f
1 changed files with 34 additions and 36 deletions
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70
fs/f2fs/gc.c
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@ -796,6 +796,29 @@ static int move_data_block(struct inode *inode, block_t bidx,
if (lfs_mode)
down_write(&fio.sbi->io_order_lock);
mpage = f2fs_grab_cache_page(META_MAPPING(fio.sbi),
fio.old_blkaddr, false);
if (!mpage)
goto up_out;
fio.encrypted_page = mpage;
/* read source block in mpage */
if (!PageUptodate(mpage)) {
err = f2fs_submit_page_bio(&fio);
if (err) {
f2fs_put_page(mpage, 1);
goto up_out;
}
lock_page(mpage);
if (unlikely(mpage->mapping != META_MAPPING(fio.sbi) ||
!PageUptodate(mpage))) {
err = -EIO;
f2fs_put_page(mpage, 1);
goto up_out;
}
}
f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,
&sum, CURSEG_COLD_DATA, NULL, false);
@ -803,44 +826,18 @@ static int move_data_block(struct inode *inode, block_t bidx,
newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS);
if (!fio.encrypted_page) {
err = -ENOMEM;
f2fs_put_page(mpage, 1);
goto recover_block;
}
mpage = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),
fio.old_blkaddr, FGP_LOCK, GFP_NOFS);
if (mpage) {
bool updated = false;
if (PageUptodate(mpage)) {
memcpy(page_address(fio.encrypted_page),
page_address(mpage), PAGE_SIZE);
updated = true;
}
f2fs_put_page(mpage, 1);
invalidate_mapping_pages(META_MAPPING(fio.sbi),
fio.old_blkaddr, fio.old_blkaddr);
if (updated)
goto write_page;
}
err = f2fs_submit_page_bio(&fio);
if (err)
goto put_page_out;
/* write page */
lock_page(fio.encrypted_page);
if (unlikely(fio.encrypted_page->mapping != META_MAPPING(fio.sbi))) {
err = -EIO;
goto put_page_out;
}
if (unlikely(!PageUptodate(fio.encrypted_page))) {
err = -EIO;
goto put_page_out;
}
write_page:
/* write target block */
f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true);
memcpy(page_address(fio.encrypted_page),
page_address(mpage), PAGE_SIZE);
f2fs_put_page(mpage, 1);
invalidate_mapping_pages(META_MAPPING(fio.sbi),
fio.old_blkaddr, fio.old_blkaddr);
set_page_dirty(fio.encrypted_page);
if (clear_page_dirty_for_io(fio.encrypted_page))
dec_page_count(fio.sbi, F2FS_DIRTY_META);
@ -871,11 +868,12 @@ write_page:
put_page_out:
f2fs_put_page(fio.encrypted_page, 1);
recover_block:
if (lfs_mode)
up_write(&fio.sbi->io_order_lock);
if (err)
f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr,
true, true);
up_out:
if (lfs_mode)
up_write(&fio.sbi->io_order_lock);
put_out:
f2fs_put_dnode(&dn);
out: