From 35af80aef99b34993783c34029d2196717e693c8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 1 Jul 2019 23:54:38 +0200 Subject: gfs2: don't use buffer_heads in gfs2_allocate_page_backing Rewrite gfs2_allocate_page_backing to call gfs2_iomap_get_alloc and operate on struct iomap directly. Signed-off-by: Christoph Hellwig Signed-off-by: Andreas Gruenbacher --- fs/gfs2/file.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-) (limited to 'fs/gfs2') diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 5d61113b3f50..8b0c2bfa90c1 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -363,31 +363,30 @@ static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size) } /** - * gfs2_allocate_page_backing - Use bmap to allocate blocks + * gfs2_allocate_page_backing - Allocate blocks for a write fault * @page: The (locked) page to allocate backing for * - * We try to allocate all the blocks required for the page in - * one go. This might fail for various reasons, so we keep - * trying until all the blocks to back this page are allocated. - * If some of the blocks are already allocated, thats ok too. + * We try to allocate all the blocks required for the page in one go. This + * might fail for various reasons, so we keep trying until all the blocks to + * back this page are allocated. If some of the blocks are already allocated, + * that is ok too. */ - static int gfs2_allocate_page_backing(struct page *page) { - struct inode *inode = page->mapping->host; - struct buffer_head bh; - unsigned long size = PAGE_SIZE; - u64 lblock = page->index << (PAGE_SHIFT - inode->i_blkbits); + u64 pos = page_offset(page); + u64 size = PAGE_SIZE; do { - bh.b_state = 0; - bh.b_size = size; - gfs2_block_map(inode, lblock, &bh, 1); - if (!buffer_mapped(&bh)) + struct iomap iomap = { }; + + if (gfs2_iomap_get_alloc(page->mapping->host, pos, 1, &iomap)) return -EIO; - size -= bh.b_size; - lblock += (bh.b_size >> inode->i_blkbits); - } while(size > 0); + + iomap.length = min(iomap.length, size); + size -= iomap.length; + pos += iomap.length; + } while (size > 0); + return 0; } -- cgit