From patchwork Tue Aug 29 14:29:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 807111 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ext4-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xhWHn3s7Pz9t38 for ; Wed, 30 Aug 2017 00:29:57 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754357AbdH2O3x (ORCPT ); Tue, 29 Aug 2017 10:29:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56410 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753591AbdH2O3u (ORCPT ); Tue, 29 Aug 2017 10:29:50 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2227968DA; Tue, 29 Aug 2017 14:29:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2227968DA Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=agruenba@redhat.com Received: from max.home.com (ovpn-116-105.ams2.redhat.com [10.36.116.105]) by smtp.corp.redhat.com (Postfix) with ESMTP id 902C9692A5; Tue, 29 Aug 2017 14:29:46 +0000 (UTC) From: Andreas Gruenbacher To: linux-fsdevel@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, Jan Kara , Christoph Hellwig , Andreas Gruenbacher Subject: [PATCH 1/4] iomap: Switch from blkno to disk offset Date: Tue, 29 Aug 2017 16:29:39 +0200 Message-Id: <20170829142942.21594-2-agruenba@redhat.com> In-Reply-To: <20170829142942.21594-1-agruenba@redhat.com> References: <20170829142942.21594-1-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 29 Aug 2017 14:29:50 +0000 (UTC) Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Replace iomap->blkno, the sector number, with iomap->addr, the disk offset in bytes. For invalid disk offsets, use the special value IOMAP_NULL_ADDR instead of IOMAP_NULL_BLOCK. This allows to use iomap for mappings which are not block aligned, such as inline data on ext4 and stuffed inodes on gfs2. Tested on xfs and ext4 with xfstests; seems to be working correctly. Signed-off-by: Andreas Gruenbacher Reviewed-by: Darrick J. Wong Reviewed-by: Jan Kara --- fs/buffer.c | 4 ++-- fs/dax.c | 2 +- fs/ext2/inode.c | 4 ++-- fs/ext4/inode.c | 4 ++-- fs/iomap.c | 11 +++++------ fs/nfsd/blocklayout.c | 4 ++-- fs/xfs/xfs_iomap.c | 6 +++--- include/linux/iomap.h | 10 +++++----- 8 files changed, 22 insertions(+), 23 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 5715dac7821f..b9d20076bb8f 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1979,8 +1979,8 @@ iomap_to_bh(struct inode *inode, sector_t block, struct buffer_head *bh, case IOMAP_MAPPED: if (offset >= i_size_read(inode)) set_buffer_new(bh); - bh->b_blocknr = (iomap->blkno >> (inode->i_blkbits - 9)) + - ((offset - iomap->offset) >> inode->i_blkbits); + bh->b_blocknr = (iomap->addr + offset - iomap->offset) >> + inode->i_blkbits; set_buffer_mapped(bh); break; } diff --git a/fs/dax.c b/fs/dax.c index 865d42c63e23..539aaa0b9c45 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -987,7 +987,7 @@ EXPORT_SYMBOL_GPL(__dax_zero_page_range); static sector_t dax_iomap_sector(struct iomap *iomap, loff_t pos) { - return iomap->blkno + (((pos & PAGE_MASK) - iomap->offset) >> 9); + return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; } static loff_t diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 30163d007b2f..e7d8925d0140 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -824,11 +824,11 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length, if (ret == 0) { iomap->type = IOMAP_HOLE; - iomap->blkno = IOMAP_NULL_BLOCK; + iomap->addr = IOMAP_NULL_ADDR; iomap->length = 1 << blkbits; } else { iomap->type = IOMAP_MAPPED; - iomap->blkno = (sector_t)bno << (blkbits - 9); + iomap->addr = (u64)bno << blkbits; iomap->length = (u64)ret << blkbits; iomap->flags |= IOMAP_F_MERGED; } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c774bdc22759..429f0afde9f2 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3483,7 +3483,7 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length, if (ret == 0) { iomap->type = IOMAP_HOLE; - iomap->blkno = IOMAP_NULL_BLOCK; + iomap->addr = IOMAP_NULL_ADDR; iomap->length = (u64)map.m_len << blkbits; } else { if (map.m_flags & EXT4_MAP_MAPPED) { @@ -3494,7 +3494,7 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length, WARN_ON_ONCE(1); return -EIO; } - iomap->blkno = (sector_t)map.m_pblk << (blkbits - 9); + iomap->addr = (u64)map.m_pblk << blkbits; iomap->length = (u64)map.m_len << blkbits; } diff --git a/fs/iomap.c b/fs/iomap.c index 59cc98ad7577..7bc1797c2292 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -350,8 +350,8 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, struct iomap *iomap) { - sector_t sector = iomap->blkno + - (((pos & ~(PAGE_SIZE - 1)) - iomap->offset) >> 9); + sector_t sector = (iomap->addr + + (pos & PAGE_MASK) - iomap->offset) >> 9; return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, sector, offset, bytes); @@ -512,9 +512,8 @@ static int iomap_to_fiemap(struct fiemap_extent_info *fi, flags |= FIEMAP_EXTENT_SHARED; return fiemap_fill_next_extent(fi, iomap->offset, - iomap->blkno != IOMAP_NULL_BLOCK ? iomap->blkno << 9: 0, + iomap->addr != IOMAP_NULL_ADDR ? iomap->addr : 0, iomap->length, flags); - } static loff_t @@ -807,7 +806,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos, bio = bio_alloc(GFP_KERNEL, 1); bio->bi_bdev = iomap->bdev; bio->bi_iter.bi_sector = - iomap->blkno + ((pos - iomap->offset) >> 9); + (iomap->addr + pos - iomap->offset) >> 9; bio->bi_private = dio; bio->bi_end_io = iomap_dio_bio_end_io; @@ -886,7 +885,7 @@ iomap_dio_actor(struct inode *inode, loff_t pos, loff_t length, bio = bio_alloc(GFP_KERNEL, nr_pages); bio->bi_bdev = iomap->bdev; bio->bi_iter.bi_sector = - iomap->blkno + ((pos - iomap->offset) >> 9); + (iomap->addr + pos - iomap->offset) >> 9; bio->bi_write_hint = dio->iocb->ki_hint; bio->bi_private = dio; bio->bi_end_io = iomap_dio_bio_end_io; diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index c862c2489df0..2d1d37b27dc7 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -65,7 +65,7 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp, bex->es = PNFS_BLOCK_READ_DATA; else bex->es = PNFS_BLOCK_READWRITE_DATA; - bex->soff = (iomap.blkno << 9); + bex->soff = iomap.addr; break; case IOMAP_UNWRITTEN: if (seg->iomode & IOMODE_RW) { @@ -78,7 +78,7 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp, } bex->es = PNFS_BLOCK_INVALID_DATA; - bex->soff = (iomap.blkno << 9); + bex->soff = iomap.addr; break; } /*FALLTHRU*/ diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 813394c62849..1bcc5d0373a5 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -54,13 +54,13 @@ xfs_bmbt_to_iomap( struct xfs_mount *mp = ip->i_mount; if (imap->br_startblock == HOLESTARTBLOCK) { - iomap->blkno = IOMAP_NULL_BLOCK; + iomap->addr = IOMAP_NULL_ADDR; iomap->type = IOMAP_HOLE; } else if (imap->br_startblock == DELAYSTARTBLOCK) { - iomap->blkno = IOMAP_NULL_BLOCK; + iomap->addr = IOMAP_NULL_ADDR; iomap->type = IOMAP_DELALLOC; } else { - iomap->blkno = xfs_fsb_to_db(ip, imap->br_startblock); + iomap->addr = (u64)xfs_fsb_to_db(ip, imap->br_startblock) << 9; if (imap->br_state == XFS_EXT_UNWRITTEN) iomap->type = IOMAP_UNWRITTEN; else diff --git a/include/linux/iomap.h b/include/linux/iomap.h index f64dc6ce5161..7b8a615fa021 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -15,8 +15,8 @@ struct vm_fault; */ #define IOMAP_HOLE 0x01 /* no blocks allocated, need allocation */ #define IOMAP_DELALLOC 0x02 /* delayed allocation blocks */ -#define IOMAP_MAPPED 0x03 /* blocks allocated @blkno */ -#define IOMAP_UNWRITTEN 0x04 /* blocks allocated @blkno in unwritten state */ +#define IOMAP_MAPPED 0x03 /* blocks allocated at @addr */ +#define IOMAP_UNWRITTEN 0x04 /* blocks allocated at @addr in unwritten state */ /* * Flags for all iomap mappings: @@ -30,12 +30,12 @@ struct vm_fault; #define IOMAP_F_SHARED 0x20 /* block shared with another file */ /* - * Magic value for blkno: + * Magic value for addr: */ -#define IOMAP_NULL_BLOCK -1LL /* blkno is not valid */ +#define IOMAP_NULL_ADDR -1ULL /* addr is not valid */ struct iomap { - sector_t blkno; /* 1st sector of mapping, 512b units */ + u64 addr; /* disk offset of mapping, bytes */ loff_t offset; /* file offset of mapping, bytes */ u64 length; /* length of mapping, bytes */ u16 type; /* type of mapping */