diff options
| author | Gao Xiang <gaoxiang25@huawei.com> | 2018-08-21 22:49:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-27 19:46:13 +0200 |
| commit | 99691b4662ddc6e62978976a434ee6444c242263 (patch) | |
| tree | 38278e92b4e3207074e6507c66d249901034b109 /drivers/staging/erofs/erofs_fs.h | |
| parent | ab47dd2b08193753ffd289d4042988d2c077cb76 (diff) | |
staging: erofs: rearrange vle clustertype definitions
This patch moves vle clustertype definitions to erofs_fs.h
since they are part of on-disk format.
It also adds compile time check for Z_EROFS_VLE_DI_CLUSTER_TYPE_BITS
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/erofs/erofs_fs.h')
| -rw-r--r-- | drivers/staging/erofs/erofs_fs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/staging/erofs/erofs_fs.h b/drivers/staging/erofs/erofs_fs.h index 2f8e2bf70941..d4bffa2852b3 100644 --- a/drivers/staging/erofs/erofs_fs.h +++ b/drivers/staging/erofs/erofs_fs.h @@ -202,6 +202,14 @@ struct erofs_extent_header { * di_u.delta[1] = distance to its corresponding tail cluster * (di_advise could be 0, 1 or 2) */ +enum { + Z_EROFS_VLE_CLUSTER_TYPE_PLAIN, + Z_EROFS_VLE_CLUSTER_TYPE_HEAD, + Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD, + Z_EROFS_VLE_CLUSTER_TYPE_RESERVED, + Z_EROFS_VLE_CLUSTER_TYPE_MAX +}; + #define Z_EROFS_VLE_DI_CLUSTER_TYPE_BITS 2 #define Z_EROFS_VLE_DI_CLUSTER_TYPE_BIT 0 @@ -260,6 +268,9 @@ static inline void erofs_check_ondisk_layout_definitions(void) BUILD_BUG_ON(sizeof(struct erofs_extent_header) != 16); BUILD_BUG_ON(sizeof(struct z_erofs_vle_decompressed_index) != 8); BUILD_BUG_ON(sizeof(struct erofs_dirent) != 12); + + BUILD_BUG_ON(BIT(Z_EROFS_VLE_DI_CLUSTER_TYPE_BITS) < + Z_EROFS_VLE_CLUSTER_TYPE_MAX - 1); } #endif |