erofs: fix ztailpacking for subpage compressed blocks
`pageofs_in` should be the compressed data offset of the page rather than of the block. Acked-by: Chao Yu <chao@kernel.org> Reviewed-by: Yue Hu <huyue2@coolpad.com> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Link: https://lore.kernel.org/r/20231214161337.753049-1-hsiangkao@linux.alibaba.com
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@ -810,7 +810,6 @@ static int z_erofs_register_pcluster(struct z_erofs_decompress_frontend *fe)
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if (ztailpacking) {
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pcl->obj.index = 0; /* which indicates ztailpacking */
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pcl->pageofs_in = erofs_blkoff(fe->inode->i_sb, map->m_pa);
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} else {
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pcl->obj.index = erofs_blknr(sb, map->m_pa);
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@ -887,6 +886,7 @@ static int z_erofs_pcluster_begin(struct z_erofs_decompress_frontend *fe)
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}
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get_page(map->buf.page);
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WRITE_ONCE(fe->pcl->compressed_bvecs[0].page, map->buf.page);
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fe->pcl->pageofs_in = map->m_pa & ~PAGE_MASK;
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fe->mode = Z_EROFS_PCLUSTER_FOLLOWED_NOINPLACE;
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}
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/* file-backed inplace I/O pages are traversed in reverse order */
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