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btrfs: convert zstd_decompress() to take a folio

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The old page API is being gradually replaced and converted to use folio
to improve code readability and avoid repeated conversion between page
and folio. And memcpy_to_page() can be replaced with memcpy_to_folio().
But there is no memzero_folio(), but it can be replaced equivalently by
folio_zero_range().

Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Li Zetao 2024-08-29 02:29:06 +08:00 committed by David Sterba
parent 9f9a4e43a8
commit b70f3a4546
3 changed files with 10 additions and 10 deletions
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2
fs/btrfs/compression.c
View file

@ -146,7 +146,7 @@ static int compression_decompress(int type, struct list_head *ws,
dest_pgoff, srclen, destlen);
case BTRFS_COMPRESS_LZO: return lzo_decompress(ws, data_in, page_folio(dest_page),
dest_pgoff, srclen, destlen);
case BTRFS_COMPRESS_ZSTD: return zstd_decompress(ws, data_in, dest_page,
case BTRFS_COMPRESS_ZSTD: return zstd_decompress(ws, data_in, page_folio(dest_page),
dest_pgoff, srclen, destlen);
case BTRFS_COMPRESS_NONE:
default:

2
fs/btrfs/compression.h
View file

@ -183,7 +183,7 @@ int zstd_compress_folios(struct list_head *ws, struct address_space *mapping,
unsigned long *total_in, unsigned long *total_out);
int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
int zstd_decompress(struct list_head *ws, const u8 *data_in,
struct page *dest_page, unsigned long dest_pgoff, size_t srclen,
struct folio *dest_folio, unsigned long dest_pgoff, size_t srclen,
size_t destlen);
void zstd_init_workspace_manager(void);
void zstd_cleanup_workspace_manager(void);

16
fs/btrfs/zstd.c
View file

@ -656,11 +656,11 @@ int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
}
int zstd_decompress(struct list_head *ws, const u8 *data_in,
struct page *dest_page, unsigned long dest_pgoff, size_t srclen,
struct folio *dest_folio, unsigned long dest_pgoff, size_t srclen,
size_t destlen)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
struct btrfs_fs_info *fs_info = btrfs_sb(dest_page->mapping->host->i_sb);
struct btrfs_fs_info *fs_info = btrfs_sb(folio_inode(dest_folio)->i_sb);
const u32 sectorsize = fs_info->sectorsize;
zstd_dstream *stream;
int ret = 0;
@ -669,12 +669,12 @@ int zstd_decompress(struct list_head *ws, const u8 *data_in,
stream = zstd_init_dstream(
ZSTD_BTRFS_MAX_INPUT, workspace->mem, workspace->size);
if (unlikely(!stream)) {
struct btrfs_inode *inode = BTRFS_I(dest_page->mapping->host);
struct btrfs_inode *inode = folio_to_inode(dest_folio);
btrfs_err(inode->root->fs_info,
"zstd decompression init failed, root %llu inode %llu offset %llu",
btrfs_root_id(inode->root), btrfs_ino(inode),
page_offset(dest_page));
folio_pos(dest_folio));
ret = -EIO;
goto finish;
}
@ -693,21 +693,21 @@ int zstd_decompress(struct list_head *ws, const u8 *data_in,
*/
ret = zstd_decompress_stream(stream, &workspace->out_buf, &workspace->in_buf);
if (unlikely(zstd_is_error(ret))) {
struct btrfs_inode *inode = BTRFS_I(dest_page->mapping->host);
struct btrfs_inode *inode = folio_to_inode(dest_folio);
btrfs_err(inode->root->fs_info,
"zstd decompression failed, error %d root %llu inode %llu offset %llu",
zstd_get_error_code(ret), btrfs_root_id(inode->root),
btrfs_ino(inode), page_offset(dest_page));
btrfs_ino(inode), folio_pos(dest_folio));
goto finish;
}
to_copy = workspace->out_buf.pos;
memcpy_to_page(dest_page, dest_pgoff, workspace->out_buf.dst, to_copy);
memcpy_to_folio(dest_folio, dest_pgoff, workspace->out_buf.dst, to_copy);
finish:
/* Error or early end. */
if (unlikely(to_copy < destlen)) {
ret = -EIO;
memzero_page(dest_page, dest_pgoff + to_copy, destlen - to_copy);
folio_zero_range(dest_folio, dest_pgoff + to_copy, destlen - to_copy);
}
return ret;
}