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| author | Manuel Bentele | 2020-10-23 15:18:01 +0200 |
|---|---|---|
| committer | Manuel Bentele | 2020-10-23 15:18:01 +0200 |
| commit | dbb41ce2b7f309d394054a6bd1e33afd578798a5 (patch) | |
| tree | 6a31092063d9f2fb5ac5720ec6759040e793c3d5 /src/kernel/xloop_file_fmt_qcow_cache.h | |
| parent | Set Linux kernel version to unknown if it is not detectable (diff) | |
| download | xloop-dbb41ce2b7f309d394054a6bd1e33afd578798a5.tar.gz xloop-dbb41ce2b7f309d394054a6bd1e33afd578798a5.tar.xz xloop-dbb41ce2b7f309d394054a6bd1e33afd578798a5.zip | |
Move the source code of all xloop components to the common 'src' directory
Diffstat (limited to 'src/kernel/xloop_file_fmt_qcow_cache.h')
| -rw-r--r-- | src/kernel/xloop_file_fmt_qcow_cache.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/kernel/xloop_file_fmt_qcow_cache.h b/src/kernel/xloop_file_fmt_qcow_cache.h new file mode 100644 index 0000000..527d4ae --- /dev/null +++ b/src/kernel/xloop_file_fmt_qcow_cache.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * xloop_file_fmt_qcow_cache.h + * + * Ported QCOW2 implementation of the QEMU project (GPL-2.0): + * L2/refcount table cache for the QCOW2 format. + * + * The copyright (C) 2010 of the original code is owned by + * Kevin Wolf <kwolf@redhat.com> + * + * Copyright (C) 2019 Manuel Bentele <development@manuel-bentele.de> + */ + +#ifndef _LINUX_XLOOP_FILE_FMT_QCOW_CACHE_H +#define _LINUX_XLOOP_FILE_FMT_QCOW_CACHE_H + +#include "xloop_file_fmt.h" + +struct xloop_file_fmt_qcow_cache_table { + s64 offset; + u64 lru_counter; + int ref; + bool dirty; +}; + +struct xloop_file_fmt_qcow_cache { + struct xloop_file_fmt_qcow_cache_table *entries; + struct xloop_file_fmt_qcow_cache *depends; + int size; + int table_size; + bool depends_on_flush; + void *table_array; + u64 lru_counter; + u64 cache_clean_lru_counter; +}; + +extern struct xloop_file_fmt_qcow_cache *xloop_file_fmt_qcow_cache_create( + struct xloop_file_fmt *xlo_fmt, + int num_tables, + unsigned table_size); + +extern void xloop_file_fmt_qcow_cache_destroy(struct xloop_file_fmt *xlo_fmt); + +extern int xloop_file_fmt_qcow_cache_get(struct xloop_file_fmt *xlo_fmt, + u64 offset, + void **table); + +extern void xloop_file_fmt_qcow_cache_put(struct xloop_file_fmt *xlo_fmt, + void **table); + +#endif |