From 6d8a1287a48909dbf542470aa2ca1ef7ceab3fc1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 10 Aug 2021 18:33:11 -0700 Subject: iomap: switch iomap_bmap to use iomap_iter Rewrite the ->bmap implementation based on iomap_iter. Signed-off-by: Christoph Hellwig [djwong: restructure the loop to make its behavior a little clearer] Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/iomap/fiemap.c | 31 +++++++++++++------------------ 1 file changed, 13 insertions(+), 18 deletions(-) (limited to 'fs/iomap') diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c index acad09a8c188..66cf267c68ae 100644 --- a/fs/iomap/fiemap.c +++ b/fs/iomap/fiemap.c @@ -92,37 +92,32 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi, } EXPORT_SYMBOL_GPL(iomap_fiemap); -static loff_t -iomap_bmap_actor(struct inode *inode, loff_t pos, loff_t length, - void *data, struct iomap *iomap, struct iomap *srcmap) -{ - sector_t *bno = data, addr; - - if (iomap->type == IOMAP_MAPPED) { - addr = (pos - iomap->offset + iomap->addr) >> inode->i_blkbits; - *bno = addr; - } - return 0; -} - /* legacy ->bmap interface. 0 is the error return (!) */ sector_t iomap_bmap(struct address_space *mapping, sector_t bno, const struct iomap_ops *ops) { - struct inode *inode = mapping->host; - loff_t pos = bno << inode->i_blkbits; - unsigned blocksize = i_blocksize(inode); + struct iomap_iter iter = { + .inode = mapping->host, + .pos = (loff_t)bno << mapping->host->i_blkbits, + .len = i_blocksize(mapping->host), + .flags = IOMAP_REPORT, + }; + const unsigned int blkshift = mapping->host->i_blkbits - SECTOR_SHIFT; int ret; if (filemap_write_and_wait(mapping)) return 0; bno = 0; - ret = iomap_apply(inode, pos, blocksize, 0, ops, &bno, - iomap_bmap_actor); + while ((ret = iomap_iter(&iter, ops)) > 0) { + if (iter.iomap.type == IOMAP_MAPPED) + bno = iomap_sector(&iter.iomap, iter.pos) >> blkshift; + /* leave iter.processed unset to abort loop */ + } if (ret) return 0; + return bno; } EXPORT_SYMBOL_GPL(iomap_bmap); -- cgit v1.2.3