From: Huang Jianan <huangjianan@oppo.com> To: linux-erofs@lists.ozlabs.org Cc: huangjianan@oppo.com, guoweichao@oppo.com, zhangshiming@oppo.com, linux-kernel@vger.kernel.org Subject: [PATCH v5] erofs: avoid using generic_block_bmap Date: Wed, 9 Dec 2020 19:57:40 +0800 [thread overview] Message-ID: <20201209115740.18802-1-huangjianan@oppo.com> (raw) 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 <huangjianan@oppo.com> Signed-off-by: Guo Weichao <guoweichao@oppo.com> --- 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
WARNING: multiple messages have this Message-ID (diff)
From: Huang Jianan <huangjianan@oppo.com> To: linux-erofs@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, guoweichao@oppo.com, zhangshiming@oppo.com Subject: [PATCH v5] erofs: avoid using generic_block_bmap Date: Wed, 9 Dec 2020 19:57:40 +0800 [thread overview] Message-ID: <20201209115740.18802-1-huangjianan@oppo.com> (raw) 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 <huangjianan@oppo.com> Signed-off-by: Guo Weichao <guoweichao@oppo.com> --- 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
next reply other threads:[~2020-12-09 11:59 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-12-09 11:57 Huang Jianan [this message] 2020-12-09 11:57 ` [PATCH v5] erofs: avoid using generic_block_bmap Huang Jianan 2020-12-10 2:36 ` Gao Xiang 2020-12-10 2:36 ` Gao Xiang 2020-12-10 3:08 ` Huang Jianan 2020-12-10 3:08 ` Huang Jianan
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