Thanks for reminding me, I will pay attention about this next time.
在 2020/12/10 10:36, Gao Xiang 写道:
Hi Jianan,
On Wed, Dec 09, 2020 at 07:57:40PM +0800, Huang Jianan wrote:
iblock indicates the number of i_blkbits-sized blocks rather than
sectors.
In addition, considering buffer_head limits mapped size to 32-bits,
should avoid using generic_block_bmap.
Fixes: 9da681e017a3 ("staging: erofs: support bmap")
Signed-off-by: Huang Jianan <huangjia...@oppo.com>
Signed-off-by: Guo Weichao <guoweic...@oppo.com>
Reviewed-by: Gao Xiang <hsiang...@redhat.com>
Also, I think Chao has sent his Reviewed-by in the previous reply ---
so unless some major modification happens, it needs to be attached with
all new versions as a common practice...
I will apply it later to for-next, thanks for your patch!
Thanks,
Gao Xiang
---
fs/erofs/data.c | 26 +++++++-------------------
1 file changed, 7 insertions(+), 19 deletions(-)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 347be146884c..ea4f693bee22 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -312,27 +312,12 @@ static void erofs_raw_access_readahead(struct
readahead_control *rac)
submit_bio(bio);
}
-static int erofs_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh, int create)
-{
- struct erofs_map_blocks map = {
- .m_la = iblock << 9,
- };
- int err;
-
- err = erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW);
- if (err)
- return err;
-
- if (map.m_flags & EROFS_MAP_MAPPED)
- bh->b_blocknr = erofs_blknr(map.m_pa);
-
- return err;
-}
-
static sector_t erofs_bmap(struct address_space *mapping, sector_t block)
{
struct inode *inode = mapping->host;
+ struct erofs_map_blocks map = {
+ .m_la = blknr_to_addr(block),
+ };
if (EROFS_I(inode)->datalayout == EROFS_INODE_FLAT_INLINE) {
erofs_blk_t blks = i_size_read(inode) >> LOG_BLOCK_SIZE;
@@ -341,7 +326,10 @@ static sector_t erofs_bmap(struct address_space *mapping,
sector_t block)
return 0;
}
- return generic_block_bmap(mapping, block, erofs_get_block);
+ if (!erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW))
+ return erofs_blknr(map.m_pa);
+
+ return 0;
}
/* for uncompressed (aligned) files and raw access for other files */
--
2.25.1
