From: "Darrick J. Wong" <darrick.wong@oracle.com> To: david@fromorbit.com, darrick.wong@oracle.com Cc: sandeen@redhat.com, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com Subject: [PATCH 24/25] xfs: support returning partial reflink results Date: Fri, 12 Oct 2018 17:08:32 -0700 [thread overview] Message-ID: <153938931226.8361.7365948775364411156.stgit@magnolia> (raw) In-Reply-To: <153938912912.8361.13446310416406388958.stgit@magnolia> From: Darrick J. Wong <darrick.wong@oracle.com> Back when the XFS reflink code only supported clone_file_range, we were only able to return zero or negative error codes to userspace. However, now that copy_file_range (which returns bytes copied) can use XFS' clone_file_range, we have the opportunity to return partial results. For example, if userspace sends a 1GB clone request and we run out of space halfway through, we at least can tell userspace that we completed 512M of that request like a regular write. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> --- fs/xfs/xfs_file.c | 5 +---- fs/xfs/xfs_reflink.c | 20 +++++++++++++++----- fs/xfs/xfs_reflink.h | 2 +- 3 files changed, 17 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index bc9e94bcb7a3..b2b15b8dc4a1 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -928,14 +928,11 @@ xfs_file_remap_range( loff_t len, unsigned int remap_flags) { - int ret; - if (!remap_check_flags(remap_flags, RFR_SAME_DATA)) return -EINVAL; - ret = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, + return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, len, remap_flags); - return ret < 0 ? ret : len; } STATIC int diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index e1592e751cc2..66a8ddb9c058 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1123,6 +1123,7 @@ xfs_reflink_remap_blocks( struct xfs_inode *dest, xfs_fileoff_t destoff, xfs_filblks_t len, + xfs_filblks_t *remapped_len, xfs_off_t new_isize) { struct xfs_bmbt_irec imap; @@ -1130,6 +1131,7 @@ xfs_reflink_remap_blocks( int error = 0; xfs_filblks_t range_len; + *remapped_len = 0; /* drange = (destoff, destoff + len); srange = (srcoff, srcoff + len) */ while (len) { uint lock_mode; @@ -1168,6 +1170,7 @@ xfs_reflink_remap_blocks( srcoff += range_len; destoff += range_len; len -= range_len; + *remapped_len += range_len; } return 0; @@ -1391,7 +1394,7 @@ xfs_reflink_remap_prep( /* * Link a range of blocks from one file to another. */ -int +loff_t xfs_reflink_remap_range( struct file *file_in, loff_t pos_in, @@ -1406,9 +1409,10 @@ xfs_reflink_remap_range( struct xfs_inode *dest = XFS_I(inode_out); struct xfs_mount *mp = src->i_mount; xfs_fileoff_t sfsbno, dfsbno; - xfs_filblks_t fsblen; + xfs_filblks_t fsblen, remappedfsb = 0; + loff_t remapped_bytes = 0; xfs_extlen_t cowextsize; - ssize_t ret; + int ret; if (!xfs_sb_version_hasreflink(&mp->m_sb)) return -EOPNOTSUPP; @@ -1424,11 +1428,17 @@ xfs_reflink_remap_range( trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); + if (len == 0) { + ret = 0; + goto out_unlock; + } + dfsbno = XFS_B_TO_FSBT(mp, pos_out); sfsbno = XFS_B_TO_FSBT(mp, pos_in); fsblen = XFS_B_TO_FSB(mp, len); ret = xfs_reflink_remap_blocks(src, sfsbno, dest, dfsbno, fsblen, - pos_out + len); + &remappedfsb, pos_out + len); + remapped_bytes = min_t(int64_t, len, XFS_FSB_TO_B(mp, remappedfsb)); if (ret) goto out_unlock; @@ -1451,7 +1461,7 @@ xfs_reflink_remap_range( xfs_reflink_remap_unlock(file_in, file_out); if (ret) trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); - return ret; + return remapped_bytes > 0 ? remapped_bytes : ret; } /* diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index c3c46c276fe1..cbc26ff79a8f 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -27,7 +27,7 @@ extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset, extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset, xfs_off_t count); extern int xfs_reflink_recover_cow(struct xfs_mount *mp); -extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, +extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t len, unsigned int remap_flags); extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
WARNING: multiple messages have this Message-ID (diff)
From: Darrick J. Wong <darrick.wong@oracle.com> To: david@fromorbit.com, darrick.wong@oracle.com Cc: sandeen@redhat.com, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com Subject: [Ocfs2-devel] [PATCH 24/25] xfs: support returning partial reflink results Date: Fri, 12 Oct 2018 17:08:32 -0700 [thread overview] Message-ID: <153938931226.8361.7365948775364411156.stgit@magnolia> (raw) In-Reply-To: <153938912912.8361.13446310416406388958.stgit@magnolia> From: Darrick J. Wong <darrick.wong@oracle.com> Back when the XFS reflink code only supported clone_file_range, we were only able to return zero or negative error codes to userspace. However, now that copy_file_range (which returns bytes copied) can use XFS' clone_file_range, we have the opportunity to return partial results. For example, if userspace sends a 1GB clone request and we run out of space halfway through, we at least can tell userspace that we completed 512M of that request like a regular write. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> --- fs/xfs/xfs_file.c | 5 +---- fs/xfs/xfs_reflink.c | 20 +++++++++++++++----- fs/xfs/xfs_reflink.h | 2 +- 3 files changed, 17 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index bc9e94bcb7a3..b2b15b8dc4a1 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -928,14 +928,11 @@ xfs_file_remap_range( loff_t len, unsigned int remap_flags) { - int ret; - if (!remap_check_flags(remap_flags, RFR_SAME_DATA)) return -EINVAL; - ret = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, + return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, len, remap_flags); - return ret < 0 ? ret : len; } STATIC int diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index e1592e751cc2..66a8ddb9c058 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1123,6 +1123,7 @@ xfs_reflink_remap_blocks( struct xfs_inode *dest, xfs_fileoff_t destoff, xfs_filblks_t len, + xfs_filblks_t *remapped_len, xfs_off_t new_isize) { struct xfs_bmbt_irec imap; @@ -1130,6 +1131,7 @@ xfs_reflink_remap_blocks( int error = 0; xfs_filblks_t range_len; + *remapped_len = 0; /* drange = (destoff, destoff + len); srange = (srcoff, srcoff + len) */ while (len) { uint lock_mode; @@ -1168,6 +1170,7 @@ xfs_reflink_remap_blocks( srcoff += range_len; destoff += range_len; len -= range_len; + *remapped_len += range_len; } return 0; @@ -1391,7 +1394,7 @@ xfs_reflink_remap_prep( /* * Link a range of blocks from one file to another. */ -int +loff_t xfs_reflink_remap_range( struct file *file_in, loff_t pos_in, @@ -1406,9 +1409,10 @@ xfs_reflink_remap_range( struct xfs_inode *dest = XFS_I(inode_out); struct xfs_mount *mp = src->i_mount; xfs_fileoff_t sfsbno, dfsbno; - xfs_filblks_t fsblen; + xfs_filblks_t fsblen, remappedfsb = 0; + loff_t remapped_bytes = 0; xfs_extlen_t cowextsize; - ssize_t ret; + int ret; if (!xfs_sb_version_hasreflink(&mp->m_sb)) return -EOPNOTSUPP; @@ -1424,11 +1428,17 @@ xfs_reflink_remap_range( trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); + if (len == 0) { + ret = 0; + goto out_unlock; + } + dfsbno = XFS_B_TO_FSBT(mp, pos_out); sfsbno = XFS_B_TO_FSBT(mp, pos_in); fsblen = XFS_B_TO_FSB(mp, len); ret = xfs_reflink_remap_blocks(src, sfsbno, dest, dfsbno, fsblen, - pos_out + len); + &remappedfsb, pos_out + len); + remapped_bytes = min_t(int64_t, len, XFS_FSB_TO_B(mp, remappedfsb)); if (ret) goto out_unlock; @@ -1451,7 +1461,7 @@ xfs_reflink_remap_range( xfs_reflink_remap_unlock(file_in, file_out); if (ret) trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); - return ret; + return remapped_bytes > 0 ? remapped_bytes : ret; } /* diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index c3c46c276fe1..cbc26ff79a8f 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -27,7 +27,7 @@ extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset, extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset, xfs_off_t count); extern int xfs_reflink_recover_cow(struct xfs_mount *mp); -extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, +extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t len, unsigned int remap_flags); extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
next prev parent reply other threads:[~2018-10-13 0:08 UTC|newest] Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-13 0:05 [PATCH v4 00/25] fs: fixes for serious clone/dedupe problems Darrick J. Wong 2018-10-13 0:05 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:05 ` [PATCH 01/25] xfs: add a per-xfs trace_printk macro Darrick J. Wong 2018-10-13 0:05 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:05 ` [PATCH 02/25] vfs: vfs_clone_file_prep_inodes should return EINVAL for a clone from beyond EOF Darrick J. Wong 2018-10-13 0:05 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 03/25] vfs: check file ranges before cloning files Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 04/25] vfs: strengthen checking of file range inputs to generic_remap_checks Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 05/25] vfs: avoid problematic remapping requests into partial EOF block Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:11 ` Christoph Hellwig 2018-10-14 17:11 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:06 ` [PATCH 06/25] vfs: skip zero-length dedupe requests Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 07/25] vfs: combine the clone and dedupe into a single remap_file_range Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:19 ` Christoph Hellwig 2018-10-14 17:19 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-15 6:04 ` Amir Goldstein 2018-10-15 12:47 ` Christoph Hellwig 2018-10-15 12:47 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-15 12:54 ` Amir Goldstein 2018-10-15 17:13 ` Darrick J. Wong 2018-10-15 17:13 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-15 18:32 ` Christoph Hellwig 2018-10-15 18:32 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-15 13:18 ` Matthew Wilcox 2018-10-15 16:42 ` Darrick J. Wong 2018-10-15 16:42 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 08/25] vfs: rename vfs_clone_file_prep to be more descriptive Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 09/25] vfs: rename clone_verify_area to remap_verify_area Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:06 ` [PATCH 10/25] vfs: create generic_remap_file_range_touch to update inode metadata Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:21 ` Christoph Hellwig 2018-10-14 17:21 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-15 16:30 ` Darrick J. Wong 2018-10-15 16:30 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-15 18:19 ` Christoph Hellwig 2018-10-15 18:19 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:06 ` [PATCH 11/25] vfs: pass remap flags to generic_remap_file_range_prep Darrick J. Wong 2018-10-13 0:06 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:22 ` Christoph Hellwig 2018-10-14 17:22 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-14 17:37 ` Christoph Hellwig 2018-10-14 17:37 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-15 15:42 ` Darrick J. Wong 2018-10-15 15:42 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` [PATCH 12/25] vfs: pass remap flags to generic_remap_checks Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` [PATCH 13/25] vfs: make remap_file_range functions take and return bytes completed Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` [PATCH 14/25] vfs: plumb RFR_* remap flags through the vfs clone functions Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` Darrick J. Wong 2018-10-13 0:07 ` [PATCH 15/25] vfs: plumb RFR_* remap flags through the vfs dedupe functions Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` [PATCH 16/25] vfs: make remapping to source file eof more explicit Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:24 ` Christoph Hellwig 2018-10-14 17:24 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-14 17:24 ` Christoph Hellwig 2018-10-14 17:24 ` Christoph Hellwig 2018-10-15 15:32 ` Darrick J. Wong 2018-10-15 15:32 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-15 18:28 ` Christoph Hellwig 2018-10-15 18:28 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:07 ` [PATCH 17/25] vfs: enable remap callers that can handle short operations Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:07 ` [PATCH 18/25] vfs: hide file range comparison function Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:43 ` Christoph Hellwig 2018-10-14 17:43 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:07 ` [PATCH 19/25] vfs: implement opportunistic short dedupe Darrick J. Wong 2018-10-13 0:07 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:26 ` Christoph Hellwig 2018-10-14 17:26 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:08 ` [PATCH 20/25] ocfs2: truncate page cache for clone destination file before remapping Darrick J. Wong 2018-10-13 0:08 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:08 ` [PATCH 21/25] ocfs2: fix pagecache truncation prior to reflink Darrick J. Wong 2018-10-13 0:08 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:08 ` [PATCH 22/25] ocfs2: support partial clone range and dedupe range Darrick J. Wong 2018-10-13 0:08 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-14 17:41 ` Christoph Hellwig 2018-10-14 17:41 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-13 0:08 ` [PATCH 23/25] xfs: fix pagecache truncation prior to reflink Darrick J. Wong 2018-10-13 0:08 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:08 ` Darrick J. Wong [this message] 2018-10-13 0:08 ` [Ocfs2-devel] [PATCH 24/25] xfs: support returning partial reflink results Darrick J. Wong 2018-10-14 17:35 ` Christoph Hellwig 2018-10-14 17:35 ` [Ocfs2-devel] " Christoph Hellwig 2018-10-14 23:05 ` Dave Chinner 2018-10-14 23:05 ` [Ocfs2-devel] " Dave Chinner 2018-10-15 15:49 ` Darrick J. Wong 2018-10-15 15:49 ` [Ocfs2-devel] " Darrick J. Wong 2018-10-13 0:08 ` [PATCH 25/25] xfs: remove redundant remap partial EOF block checks Darrick J. Wong 2018-10-13 0:08 ` [Ocfs2-devel] " Darrick J. Wong -- strict thread matches above, loose matches on Subject: below -- 2018-10-11 4:12 [PATCH v3 00/25] fs: fixes for serious clone/dedupe problems Darrick J. Wong 2018-10-11 4:15 ` [PATCH 24/25] xfs: support returning partial reflink results Darrick J. Wong 2018-10-12 1:22 ` Dave Chinner 2018-10-12 16:06 ` Darrick J. Wong
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