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btrfs: reflink: make copy_inline_to_page() to be subpage compatible

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The modifications are:

- Page copy destination
  For subpage case, one page can contain multiple sectors, thus we can
  no longer expect the memcpy_to_page()/btrfs_decompress() to copy
  data into page offset 0.
  The correct offset is offset_in_page(file_offset) now, which should
  handle both regular sectorsize and subpage cases well.

- Page status update
  Now we need to use subpage helper to handle the page status update.

Tested-by: Ritesh Harjani <riteshh@linux.ibm.com> # [ppc64]
Tested-by: Anand Jain <anand.jain@oracle.com> # [aarch64]
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2021-05-31 16:50:53 +08:00 committed by David Sterba
parent 2d8ec40ee4
commit 3115deb381
1 changed files with 9 additions and 5 deletions
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14
fs/btrfs/reflink.c
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@ -7,6 +7,7 @@
#include "delalloc-space.h"
#include "reflink.h"
#include "transaction.h"
#include "subpage.h"
#define BTRFS_MAX_DEDUPE_LEN SZ_16M
@ -52,7 +53,8 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
const u64 datal,
const u8 comp_type)
{
const u64 block_size = btrfs_inode_sectorsize(inode);
struct btrfs_fs_info *fs_info = inode->root->fs_info;
const u32 block_size = fs_info->sectorsize;
const u64 range_end = file_offset + block_size - 1;
const size_t inline_size = size - btrfs_file_extent_calc_inline_size(0);
char *data_start = inline_data + btrfs_file_extent_calc_inline_size(0);
@ -106,10 +108,12 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
set_bit(BTRFS_INODE_NO_DELALLOC_FLUSH, &inode->runtime_flags);
if (comp_type == BTRFS_COMPRESS_NONE) {
memcpy_to_page(page, 0, data_start, datal);
memcpy_to_page(page, offset_in_page(file_offset), data_start,
datal);
flush_dcache_page(page);
} else {
ret = btrfs_decompress(comp_type, data_start, page, 0,
ret = btrfs_decompress(comp_type, data_start, page,
offset_in_page(file_offset),
inline_size, datal);
if (ret)
goto out_unlock;
@ -133,9 +137,9 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
flush_dcache_page(page);
}
SetPageUptodate(page);
btrfs_page_set_uptodate(fs_info, page, file_offset, block_size);
ClearPageChecked(page);
set_page_dirty(page);
btrfs_page_set_dirty(fs_info, page, file_offset, block_size);
out_unlock:
if (page) {
unlock_page(page);