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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-05-08 15:33:57 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-05-08 15:36:43 +0300 |
| commit | d69189428d50c9a8de6475f3c8c241f86f4e764a (patch) | |
| tree | 0893ae67b4c10d250ebe8b75bf6861b8b5cd8a6e /fs | |
| parent | 1872df8dcd87bd1e623e1a70076d08636b9c473d (diff) | |
| download | linux-d69189428d50c9a8de6475f3c8c241f86f4e764a.tar.xz | |
erofs: clean up z_erofs_load_full_lcluster()
Only four lcluster types here, remove redundant code.
No real logic changes.
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240508123357.3266173-1-hsiangkao@linux.alibaba.com
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/erofs/erofs_fs.h | 5 | ||||
| -rw-r--r-- | fs/erofs/zmap.c | 21 |
2 files changed, 6 insertions, 20 deletions
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index a03ec70ba6f2..550baf1729d4 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -396,8 +396,7 @@ enum { Z_EROFS_LCLUSTER_TYPE_MAX }; -#define Z_EROFS_LI_LCLUSTER_TYPE_BITS 2 -#define Z_EROFS_LI_LCLUSTER_TYPE_BIT 0 +#define Z_EROFS_LI_LCLUSTER_TYPE_MASK (Z_EROFS_LCLUSTER_TYPE_MAX - 1) /* (noncompact only, HEAD) This pcluster refers to partial decompressed data */ #define Z_EROFS_LI_PARTIAL_REF (1 << 15) @@ -451,8 +450,6 @@ static inline void erofs_check_ondisk_layout_definitions(void) sizeof(struct z_erofs_lcluster_index)); BUILD_BUG_ON(sizeof(struct erofs_deviceslot) != 128); - BUILD_BUG_ON(BIT(Z_EROFS_LI_LCLUSTER_TYPE_BITS) < - Z_EROFS_LCLUSTER_TYPE_MAX - 1); /* exclude old compiler versions like gcc 7.5.0 */ BUILD_BUG_ON(__builtin_constant_p(fmh) ? fmh != cpu_to_le64(1ULL << 63) : 0); diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c index e313c936351d..26637a60eba5 100644 --- a/fs/erofs/zmap.c +++ b/fs/erofs/zmap.c @@ -31,7 +31,7 @@ static int z_erofs_load_full_lcluster(struct z_erofs_maprecorder *m, vi->inode_isize + vi->xattr_isize) + lcn * sizeof(struct z_erofs_lcluster_index); struct z_erofs_lcluster_index *di; - unsigned int advise, type; + unsigned int advise; m->kaddr = erofs_read_metabuf(&m->map->buf, inode->i_sb, erofs_blknr(inode->i_sb, pos), EROFS_KMAP); @@ -43,10 +43,8 @@ static int z_erofs_load_full_lcluster(struct z_erofs_maprecorder *m, di = m->kaddr + erofs_blkoff(inode->i_sb, pos); advise = le16_to_cpu(di->di_advise); - type = (advise >> Z_EROFS_LI_LCLUSTER_TYPE_BIT) & - ((1 << Z_EROFS_LI_LCLUSTER_TYPE_BITS) - 1); - switch (type) { - case Z_EROFS_LCLUSTER_TYPE_NONHEAD: + m->type = advise & Z_EROFS_LI_LCLUSTER_TYPE_MASK; + if (m->type == Z_EROFS_LCLUSTER_TYPE_NONHEAD) { m->clusterofs = 1 << vi->z_logical_clusterbits; m->delta[0] = le16_to_cpu(di->di_u.delta[0]); if (m->delta[0] & Z_EROFS_LI_D0_CBLKCNT) { @@ -60,24 +58,15 @@ static int z_erofs_load_full_lcluster(struct z_erofs_maprecorder *m, m->delta[0] = 1; } m->delta[1] = le16_to_cpu(di->di_u.delta[1]); - break; - case Z_EROFS_LCLUSTER_TYPE_PLAIN: - case Z_EROFS_LCLUSTER_TYPE_HEAD1: - case Z_EROFS_LCLUSTER_TYPE_HEAD2: - if (advise & Z_EROFS_LI_PARTIAL_REF) - m->partialref = true; + } else { + m->partialref = !!(advise & Z_EROFS_LI_PARTIAL_REF); m->clusterofs = le16_to_cpu(di->di_clusterofs); if (m->clusterofs >= 1 << vi->z_logical_clusterbits) { DBG_BUGON(1); return -EFSCORRUPTED; } m->pblk = le32_to_cpu(di->di_u.blkaddr); - break; - default: - DBG_BUGON(1); - return -EOPNOTSUPP; } - m->type = type; return 0; } |