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authorGao Xiang <hsiangkao@linux.alibaba.com>2022-07-15 23:41:49 +0800
committerGao Xiang <hsiangkao@linux.alibaba.com>2022-07-21 22:53:43 +0800
commit0d823b424f1b74831f05fedb6700b5c69f5ecf6a (patch)
tree2898aea4473f323ae3e956d4d67f44b1c45cc300 /fs/erofs
parent83a386c0a53d5f7387c08676e1733c27db77ec8a (diff)
erofs: clean up z_erofs_collector_begin()
Rearrange the code and get rid of all gotos. Reviewed-by: Yue Hu <huyue2@coolpad.com> Acked-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Link: https://lore.kernel.org/r/20220715154203.48093-3-hsiangkao@linux.alibaba.com
Diffstat (limited to 'fs/erofs')
-rw-r--r--fs/erofs/zdata.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 1b6816dd235f..c7be447ac64d 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -521,7 +521,7 @@ err_out:
static int z_erofs_collector_begin(struct z_erofs_decompress_frontend *fe)
{
struct erofs_map_blocks *map = &fe->map;
- struct erofs_workgroup *grp;
+ struct erofs_workgroup *grp = NULL;
int ret;
DBG_BUGON(fe->pcl);
@@ -530,33 +530,31 @@ static int z_erofs_collector_begin(struct z_erofs_decompress_frontend *fe)
DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_NIL);
DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
- if (map->m_flags & EROFS_MAP_META) {
- if ((map->m_pa & ~PAGE_MASK) + map->m_plen > PAGE_SIZE) {
- DBG_BUGON(1);
- return -EFSCORRUPTED;
- }
- goto tailpacking;
+ if (!(map->m_flags & EROFS_MAP_META)) {
+ grp = erofs_find_workgroup(fe->inode->i_sb,
+ map->m_pa >> PAGE_SHIFT);
+ } else if ((map->m_pa & ~PAGE_MASK) + map->m_plen > PAGE_SIZE) {
+ DBG_BUGON(1);
+ return -EFSCORRUPTED;
}
- grp = erofs_find_workgroup(fe->inode->i_sb, map->m_pa >> PAGE_SHIFT);
if (grp) {
fe->pcl = container_of(grp, struct z_erofs_pcluster, obj);
+ ret = -EEXIST;
} else {
-tailpacking:
ret = z_erofs_register_pcluster(fe);
- if (!ret)
- goto out;
- if (ret != -EEXIST)
- return ret;
}
- ret = z_erofs_lookup_pcluster(fe);
- if (ret) {
- erofs_workgroup_put(&fe->pcl->obj);
+ if (ret == -EEXIST) {
+ ret = z_erofs_lookup_pcluster(fe);
+ if (ret) {
+ erofs_workgroup_put(&fe->pcl->obj);
+ return ret;
+ }
+ } else if (ret) {
return ret;
}
-out:
z_erofs_pagevec_ctor_init(&fe->vector, Z_EROFS_NR_INLINE_PAGEVECS,
fe->pcl->pagevec, fe->pcl->vcnt);
/* since file-backed online pages are traversed in reverse order */