From patchwork Mon Jul 15 17:59:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 11044629 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1E39813A4 for ; Mon, 15 Jul 2019 18:00:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 12A5F1FF65 for ; Mon, 15 Jul 2019 18:00:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 06A0426AE3; Mon, 15 Jul 2019 18:00:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1CD3E262FF for ; Mon, 15 Jul 2019 18:00:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729137AbfGOSAD (ORCPT ); Mon, 15 Jul 2019 14:00:03 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:37456 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726074AbfGOSAD (ORCPT ); Mon, 15 Jul 2019 14:00:03 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6FHxSWv149518; Mon, 15 Jul 2019 17:59:42 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : cc : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=rw7UIvpdyFBvMpw0PNQPdWqzMmPl4BB9Kuj3vuhtb+k=; b=th0OaR85P+b3VZuG15cD7tkFNHjsG8+9yOO0UbLA2wOUMPSyi6SqxRGb9GiUIImdqUcC Cu8qLnlfsCWLZYJFReRzCdtOcrkq+9Hnpu1iDo7VxWlIQW96Hig8lOrb2+pkSYxT1B2d Gzt1/G6jMw1shCfovOyI5wZDVsroVBgB08P4oy34bdE1q59RFdwpJ1hozYQCPkRsjzkD RszEwNE025b4fyvKN4m+NvSGYI2MvfMqYelLgNGQGGX6PtVgKHXlwfnvCcFj00RZIUJA vpiXn5zBESUWhQbcF24iC1eISzhDCjokfgkPRlTyLE3BP/cJ44i/qNwOCYuu0+MLlmOV dg== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2120.oracle.com with ESMTP id 2tq7xqr0cy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Jul 2019 17:59:42 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6FHwUsV103191; Mon, 15 Jul 2019 17:59:41 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3030.oracle.com with ESMTP id 2tq5bbxhdc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Jul 2019 17:59:41 +0000 Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x6FHxemN004445; Mon, 15 Jul 2019 17:59:40 GMT Received: from localhost (/67.169.218.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 15 Jul 2019 10:59:40 -0700 Subject: [PATCH 3/9] iomap: move the file mapping reporting code into a separate file From: "Darrick J. Wong" To: hch@infradead.org, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, agruenba@redhat.com Date: Mon, 15 Jul 2019 10:59:39 -0700 Message-ID: <156321357958.148361.3663936110731905790.stgit@magnolia> In-Reply-To: <156321356040.148361.7463881761568794395.stgit@magnolia> References: <156321356040.148361.7463881761568794395.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9319 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907150209 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9319 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907150209 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Darrick J. Wong Move the file mapping reporting code (FIEMAP/FIBMAP) into a separate file so that we can group related functions in a single file instead of having a single enormous source file. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/iomap.c | 136 ------------------------------------------------- fs/iomap/Makefile | 3 + fs/iomap/fiemap.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 149 insertions(+), 136 deletions(-) create mode 100644 fs/iomap/fiemap.c diff --git a/fs/iomap.c b/fs/iomap.c index 521e90825dbe..d14d75a97ab3 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -1149,108 +1149,6 @@ vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops) } EXPORT_SYMBOL_GPL(iomap_page_mkwrite); -struct fiemap_ctx { - struct fiemap_extent_info *fi; - struct iomap prev; -}; - -static int iomap_to_fiemap(struct fiemap_extent_info *fi, - struct iomap *iomap, u32 flags) -{ - switch (iomap->type) { - case IOMAP_HOLE: - /* skip holes */ - return 0; - case IOMAP_DELALLOC: - flags |= FIEMAP_EXTENT_DELALLOC | FIEMAP_EXTENT_UNKNOWN; - break; - case IOMAP_MAPPED: - break; - case IOMAP_UNWRITTEN: - flags |= FIEMAP_EXTENT_UNWRITTEN; - break; - case IOMAP_INLINE: - flags |= FIEMAP_EXTENT_DATA_INLINE; - break; - } - - if (iomap->flags & IOMAP_F_MERGED) - flags |= FIEMAP_EXTENT_MERGED; - if (iomap->flags & IOMAP_F_SHARED) - flags |= FIEMAP_EXTENT_SHARED; - - return fiemap_fill_next_extent(fi, iomap->offset, - iomap->addr != IOMAP_NULL_ADDR ? iomap->addr : 0, - iomap->length, flags); -} - -static loff_t -iomap_fiemap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, - struct iomap *iomap) -{ - struct fiemap_ctx *ctx = data; - loff_t ret = length; - - if (iomap->type == IOMAP_HOLE) - return length; - - ret = iomap_to_fiemap(ctx->fi, &ctx->prev, 0); - ctx->prev = *iomap; - switch (ret) { - case 0: /* success */ - return length; - case 1: /* extent array full */ - return 0; - default: - return ret; - } -} - -int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi, - loff_t start, loff_t len, const struct iomap_ops *ops) -{ - struct fiemap_ctx ctx; - loff_t ret; - - memset(&ctx, 0, sizeof(ctx)); - ctx.fi = fi; - ctx.prev.type = IOMAP_HOLE; - - ret = fiemap_check_flags(fi, FIEMAP_FLAG_SYNC); - if (ret) - return ret; - - if (fi->fi_flags & FIEMAP_FLAG_SYNC) { - ret = filemap_write_and_wait(inode->i_mapping); - if (ret) - return ret; - } - - while (len > 0) { - ret = iomap_apply(inode, start, len, IOMAP_REPORT, ops, &ctx, - iomap_fiemap_actor); - /* inode with no (attribute) mapping will give ENOENT */ - if (ret == -ENOENT) - break; - if (ret < 0) - return ret; - if (ret == 0) - break; - - start += ret; - len -= ret; - } - - if (ctx.prev.type != IOMAP_HOLE) { - ret = iomap_to_fiemap(fi, &ctx.prev, FIEMAP_EXTENT_LAST); - if (ret < 0) - return ret; - } - - return 0; -} -EXPORT_SYMBOL_GPL(iomap_fiemap); - /* * Seek for SEEK_DATA / SEEK_HOLE within @page, starting at @lastoff. * Returns true if found and updates @lastoff to the offset in file. @@ -1999,37 +1897,3 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, return ret; } EXPORT_SYMBOL_GPL(iomap_dio_rw); - -static loff_t -iomap_bmap_actor(struct inode *inode, loff_t pos, loff_t length, - void *data, struct iomap *iomap) -{ - sector_t *bno = data, addr; - - if (iomap->type == IOMAP_MAPPED) { - addr = (pos - iomap->offset + iomap->addr) >> inode->i_blkbits; - if (addr > INT_MAX) - WARN(1, "would truncate bmap result\n"); - else - *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); - - if (filemap_write_and_wait(mapping)) - return 0; - - bno = 0; - iomap_apply(inode, pos, blocksize, 0, ops, &bno, iomap_bmap_actor); - return bno; -} -EXPORT_SYMBOL_GPL(iomap_bmap); diff --git a/fs/iomap/Makefile b/fs/iomap/Makefile index e38061f2b901..861c07137792 100644 --- a/fs/iomap/Makefile +++ b/fs/iomap/Makefile @@ -8,4 +8,7 @@ ccflags-y += -I $(srctree)/$(src)/.. obj-$(CONFIG_FS_IOMAP) += iomap.o +iomap-y += \ + fiemap.o + iomap-$(CONFIG_SWAP) += swapfile.o diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c new file mode 100644 index 000000000000..1f43315468b7 --- /dev/null +++ b/fs/iomap/fiemap.c @@ -0,0 +1,146 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2016-2018 Christoph Hellwig. + */ +#include +#include +#include +#include + +#include "internal.h" + +struct fiemap_ctx { + struct fiemap_extent_info *fi; + struct iomap prev; +}; + +static int iomap_to_fiemap(struct fiemap_extent_info *fi, + struct iomap *iomap, u32 flags) +{ + switch (iomap->type) { + case IOMAP_HOLE: + /* skip holes */ + return 0; + case IOMAP_DELALLOC: + flags |= FIEMAP_EXTENT_DELALLOC | FIEMAP_EXTENT_UNKNOWN; + break; + case IOMAP_MAPPED: + break; + case IOMAP_UNWRITTEN: + flags |= FIEMAP_EXTENT_UNWRITTEN; + break; + case IOMAP_INLINE: + flags |= FIEMAP_EXTENT_DATA_INLINE; + break; + } + + if (iomap->flags & IOMAP_F_MERGED) + flags |= FIEMAP_EXTENT_MERGED; + if (iomap->flags & IOMAP_F_SHARED) + flags |= FIEMAP_EXTENT_SHARED; + + return fiemap_fill_next_extent(fi, iomap->offset, + iomap->addr != IOMAP_NULL_ADDR ? iomap->addr : 0, + iomap->length, flags); +} + +static loff_t +iomap_fiemap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, + struct iomap *iomap) +{ + struct fiemap_ctx *ctx = data; + loff_t ret = length; + + if (iomap->type == IOMAP_HOLE) + return length; + + ret = iomap_to_fiemap(ctx->fi, &ctx->prev, 0); + ctx->prev = *iomap; + switch (ret) { + case 0: /* success */ + return length; + case 1: /* extent array full */ + return 0; + default: + return ret; + } +} + +int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi, + loff_t start, loff_t len, const struct iomap_ops *ops) +{ + struct fiemap_ctx ctx; + loff_t ret; + + memset(&ctx, 0, sizeof(ctx)); + ctx.fi = fi; + ctx.prev.type = IOMAP_HOLE; + + ret = fiemap_check_flags(fi, FIEMAP_FLAG_SYNC); + if (ret) + return ret; + + if (fi->fi_flags & FIEMAP_FLAG_SYNC) { + ret = filemap_write_and_wait(inode->i_mapping); + if (ret) + return ret; + } + + while (len > 0) { + ret = iomap_apply(inode, start, len, IOMAP_REPORT, ops, &ctx, + iomap_fiemap_actor); + /* inode with no (attribute) mapping will give ENOENT */ + if (ret == -ENOENT) + break; + if (ret < 0) + return ret; + if (ret == 0) + break; + + start += ret; + len -= ret; + } + + if (ctx.prev.type != IOMAP_HOLE) { + ret = iomap_to_fiemap(fi, &ctx.prev, FIEMAP_EXTENT_LAST); + if (ret < 0) + return ret; + } + + return 0; +} +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) +{ + sector_t *bno = data, addr; + + if (iomap->type == IOMAP_MAPPED) { + addr = (pos - iomap->offset + iomap->addr) >> inode->i_blkbits; + if (addr > INT_MAX) + WARN(1, "would truncate bmap result\n"); + else + *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); + + if (filemap_write_and_wait(mapping)) + return 0; + + bno = 0; + iomap_apply(inode, pos, blocksize, 0, ops, &bno, iomap_bmap_actor); + return bno; +} +EXPORT_SYMBOL_GPL(iomap_bmap);