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btrfs: expand cow_file_range() to support in-band dedup and subpage-blocksize 

Extract cow_file_range() new parameters for both in-band dedupe and
subpage sector size patchset.

This should make conflict of both patchset to minimal, and reduce the
effort needed to rebase them.

Cc: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Wang Xiaoguang 2016-07-11 11:05:29 +08:00 committed by David Sterba
parent f5daf2c780
commit dda3245eca
2 changed files with 41 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
fs/btrfs/dedupe.h Normal file
View File

@ -0,0 +1,24 @@
/*
* Copyright (C) 2016 Fujitsu. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __BTRFS_DEDUPE__
#define __BTRFS_DEDUPE__
/* later in-band dedupe will expand this struct */
struct btrfs_dedupe_hash;
#endif

28
fs/btrfs/inode.c
View File

@ -60,6 +60,7 @@
#include "hash.h"
#include "props.h"
#include "qgroup.h"
#include "dedupe.h"
struct btrfs_iget_args {
struct btrfs_key *location;
@ -105,8 +106,9 @@ static int btrfs_truncate(struct inode *inode);
static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
static noinline int cow_file_range(struct inode *inode,
struct page *locked_page,
u64 start, u64 end, int *page_started,
unsigned long *nr_written, int unlock);
u64 start, u64 end, u64 delalloc_end,
int *page_started, unsigned long *nr_written,
int unlock, struct btrfs_dedupe_hash *hash);
static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
u64 len, u64 orig_start,
u64 block_start, u64 block_len,
@ -710,7 +712,10 @@ retry:
async_extent->start,
async_extent->start +
async_extent->ram_size - 1,
&page_started, &nr_written, 0);
async_extent->start +
async_extent->ram_size - 1,
&page_started, &nr_written, 0,
NULL);
/* JDM XXX */
@ -923,9 +928,9 @@ static u64 get_extent_allocation_hint(struct inode *inode, u64 start,
*/
static noinline int cow_file_range(struct inode *inode,
struct page *locked_page,
u64 start, u64 end, int *page_started,
unsigned long *nr_written,
int unlock)
u64 start, u64 end, u64 delalloc_end,
int *page_started, unsigned long *nr_written,
int unlock, struct btrfs_dedupe_hash *hash)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 alloc_hint = 0;
@ -1416,7 +1421,8 @@ out_check:
if (cow_start != (u64)-1) {
ret = cow_file_range(inode, locked_page,
cow_start, found_key.offset - 1,
page_started, nr_written, 1);
end, page_started, nr_written, 1,
NULL);
if (ret) {
if (!nolock && nocow)
btrfs_end_write_no_snapshoting(root);
@ -1499,8 +1505,8 @@ out_check:
}
if (cow_start != (u64)-1) {
ret = cow_file_range(inode, locked_page, cow_start, end,
page_started, nr_written, 1);
ret = cow_file_range(inode, locked_page, cow_start, end, end,
page_started, nr_written, 1, NULL);
if (ret)
goto error;
}
@ -1559,8 +1565,8 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, 0, nr_written);
} else if (!inode_need_compress(inode)) {
ret = cow_file_range(inode, locked_page, start, end,
page_started, nr_written, 1);
ret = cow_file_range(inode, locked_page, start, end, end,
page_started, nr_written, 1, NULL);
} else {
set_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
&BTRFS_I(inode)->runtime_flags);