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erofs: introduce erofs_sb_has_xxx() helpers 

Introduce erofs_sb_has_xxx() to make long checks short, especially
for later big pcluster & LZMA features.

Link: https://lore.kernel.org/r/20210329012308.28743-2-hsiangkao@aol.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
This commit is contained in:
Gao Xiang 2021-03-29 09:23:05 +08:00
parent 24a806d849
commit de06a6a375
3 changed files with 11 additions and 3 deletions
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3
fs/erofs/decompressor.c
View File

@ -124,8 +124,7 @@ static int z_erofs_lz4_decompress(struct z_erofs_decompress_req *rq, u8 *out)
support_0padding = false;
/* decompression inplace is only safe when 0padding is enabled */
if (EROFS_SB(rq->sb)->feature_incompat &
EROFS_FEATURE_INCOMPAT_LZ4_0PADDING) {
if (erofs_sb_has_lz4_0padding(EROFS_SB(rq->sb))) {
support_0padding = true;
while (!src[inputmargin & ~PAGE_MASK])

9
fs/erofs/internal.h
View File

@ -218,6 +218,15 @@ static inline erofs_off_t iloc(struct erofs_sb_info *sbi, erofs_nid_t nid)
return blknr_to_addr(sbi->meta_blkaddr) + (nid << sbi->islotbits);
}
#define EROFS_FEATURE_FUNCS(name, compat, feature) \
static inline bool erofs_sb_has_##name(struct erofs_sb_info *sbi) \
{ \
return sbi->feature_##compat & EROFS_FEATURE_##feature; \
}
EROFS_FEATURE_FUNCS(lz4_0padding, incompat, INCOMPAT_LZ4_0PADDING)
EROFS_FEATURE_FUNCS(sb_chksum, compat, COMPAT_SB_CHKSUM)
/* atomic flag definitions */
#define EROFS_I_EA_INITED_BIT 0
#define EROFS_I_Z_INITED_BIT 1

2
fs/erofs/super.c
View File

@ -149,7 +149,7 @@ static int erofs_read_superblock(struct super_block *sb)
}
sbi->feature_compat = le32_to_cpu(dsb->feature_compat);
if (sbi->feature_compat & EROFS_FEATURE_COMPAT_SB_CHKSUM) {
if (erofs_sb_has_sb_chksum(sbi)) {
ret = erofs_superblock_csum_verify(sb, data);
if (ret)
goto out;