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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: david@fromorbit.com, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, ocfs2-devel@oss.oracle.com,
	sandeen@redhat.com
Subject: [PATCH 10/15] vfs: make cloning to source file eof more explicit
Date: Thu, 04 Oct 2018 17:45:48 -0700	[thread overview]
Message-ID: <153870034823.29072.4817036324117498634.stgit@magnolia> (raw)
In-Reply-To: <153870027422.29072.7433543674436957232.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Use the new CLONE_RANGE_EOF flag to explicitly declare that the caller
wants the clone implementation to set *len appropriately once the files
are locked.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/read_write.c |   14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)


diff --git a/fs/read_write.c b/fs/read_write.c
index 7cfff497263b..4eaea52f70a8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1747,11 +1747,12 @@ int vfs_clone_file_prep(struct file *file_in, loff_t pos_in,
 
 	isize = i_size_read(inode_in);
 
-	/* Zero length dedupe exits immediately; reflink goes to EOF. */
-	if (*len == 0) {
-		if (is_dedupe || pos_in == isize)
-			return 0;
-		if (pos_in > isize)
+	/*
+	 * If the caller asked to go all the way to the end of the source file,
+	 * set *len now that we have the file locked.
+	 */
+	if ((flags & CLONERANGE_EOF) && *len == 0) {
+		if (pos_in >= isize)
 			return -EINVAL;
 		*len = isize - pos_in;
 	}
@@ -1836,6 +1837,9 @@ int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
 	if (ret)
 		return ret;
 
+	if (len == 0)
+		flags |= CLONERANGE_EOF;
+
 	cloned = file_in->f_op->clone_file_range(file_in, pos_in,
 			file_out, pos_out, len, flags);
 	if (cloned < 0)


WARNING: multiple messages have this Message-ID
From: Darrick J. Wong <darrick.wong@oracle.com>
To: david@fromorbit.com, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, ocfs2-devel@oss.oracle.com,
	sandeen@redhat.com
Subject: [Ocfs2-devel] [PATCH 10/15] vfs: make cloning to source file eof more explicit
Date: Thu, 04 Oct 2018 17:45:48 -0700	[thread overview]
Message-ID: <153870034823.29072.4817036324117498634.stgit@magnolia> (raw)
In-Reply-To: <153870027422.29072.7433543674436957232.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Use the new CLONE_RANGE_EOF flag to explicitly declare that the caller
wants the clone implementation to set *len appropriately once the files
are locked.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/read_write.c |   14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)


diff --git a/fs/read_write.c b/fs/read_write.c
index 7cfff497263b..4eaea52f70a8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1747,11 +1747,12 @@ int vfs_clone_file_prep(struct file *file_in, loff_t pos_in,
 
 	isize = i_size_read(inode_in);
 
-	/* Zero length dedupe exits immediately; reflink goes to EOF. */
-	if (*len == 0) {
-		if (is_dedupe || pos_in == isize)
-			return 0;
-		if (pos_in > isize)
+	/*
+	 * If the caller asked to go all the way to the end of the source file,
+	 * set *len now that we have the file locked.
+	 */
+	if ((flags & CLONERANGE_EOF) && *len == 0) {
+		if (pos_in >= isize)
 			return -EINVAL;
 		*len = isize - pos_in;
 	}
@@ -1836,6 +1837,9 @@ int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
 	if (ret)
 		return ret;
 
+	if (len == 0)
+		flags |= CLONERANGE_EOF;
+
 	cloned = file_in->f_op->clone_file_range(file_in, pos_in,
 			file_out, pos_out, len, flags);
 	if (cloned < 0)

  parent reply	other threads:[~2018-10-05  0:45 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-05  0:44 [PATCH 00/15] fs: fixes for serious clone/dedupe problems Darrick J. Wong
2018-10-05  0:44 ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:44 ` [PATCH 01/15] xfs: add a per-xfs trace_printk macro Darrick J. Wong
2018-10-05  0:44   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:44 ` [PATCH 02/15] xfs: refactor clonerange preparation into a separate helper Darrick J. Wong
2018-10-05  0:44   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  5:28   ` Dave Chinner
2018-10-05  5:28     ` [Ocfs2-devel] " Dave Chinner
2018-10-05 17:06     ` Darrick J. Wong
2018-10-05 17:06       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-06 10:30     ` Christoph Hellwig
2018-10-06 10:30       ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  7:02   ` Dave Chinner
2018-10-05  7:02     ` [Ocfs2-devel] " Dave Chinner
2018-10-05  9:02     ` Dave Chinner
2018-10-05  9:02       ` [Ocfs2-devel] " Dave Chinner
2018-10-05 17:21       ` Darrick J. Wong
2018-10-05 17:21         ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05 23:42         ` Dave Chinner
2018-10-05 23:42           ` [Ocfs2-devel] " Dave Chinner
2018-10-05  0:44 ` [PATCH 03/15] xfs: zero posteof blocks when cloning above eof Darrick J. Wong
2018-10-05  0:44   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  5:28   ` Dave Chinner
2018-10-05  5:28     ` [Ocfs2-devel] " Dave Chinner
2018-10-06 10:34   ` Christoph Hellwig
2018-10-06 10:34     ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  0:45 ` [PATCH 04/15] xfs: update ctime and remove suid before cloning files Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  5:30   ` Dave Chinner
2018-10-05  5:30     ` [Ocfs2-devel] " Dave Chinner
2018-10-06 10:35   ` Christoph Hellwig
2018-10-06 10:35     ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  0:45 ` [PATCH 05/15] vfs: check file ranges " Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-06 10:38   ` Christoph Hellwig
2018-10-06 10:38     ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  0:45 ` [PATCH 06/15] vfs: strengthen checking of file range inputs to clone/dedupe range Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  6:10   ` Amir Goldstein
2018-10-05 17:36     ` Darrick J. Wong
2018-10-05 17:36       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:45 ` [PATCH 07/15] vfs: skip zero-length dedupe requests Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  8:39   ` Amir Goldstein
2018-10-06 10:39   ` Christoph Hellwig
2018-10-06 10:39     ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  0:45 ` [PATCH 08/15] vfs: change clone and dedupe range function pointers to return bytes completed Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  8:06   ` Amir Goldstein
2018-10-05 21:47     ` Darrick J. Wong
2018-10-05 21:47       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-06 10:41   ` Christoph Hellwig
2018-10-06 10:41     ` [Ocfs2-devel] " Christoph Hellwig
2018-10-08 18:59     ` Darrick J. Wong
2018-10-08 18:59       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:45 ` [PATCH 09/15] vfs: pass operation flags to {clone, dedupe}_file_range implementations Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  7:07   ` Amir Goldstein
2018-10-05 17:50     ` Darrick J. Wong
2018-10-05 17:50       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-06 10:44       ` Christoph Hellwig
2018-10-06 10:44         ` [Ocfs2-devel] " Christoph Hellwig
2018-10-05  0:45 ` Darrick J. Wong [this message]
2018-10-05  0:45   ` [Ocfs2-devel] [PATCH 10/15] vfs: make cloning to source file eof more explicit Darrick J. Wong
2018-10-05  6:47   ` Amir Goldstein
2018-10-05  0:45 ` [PATCH 11/15] vfs: allow short clone and dedupe operations Darrick J. Wong
2018-10-05  0:45   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:46 ` [PATCH 12/15] vfs: implement opportunistic short dedupe Darrick J. Wong
2018-10-05  0:46   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  6:40   ` Amir Goldstein
2018-10-05 17:42     ` Darrick J. Wong
2018-10-05 17:42       ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:46 ` [PATCH 13/15] ocfs2: truncate page cache for clone destination file before remapping Darrick J. Wong
2018-10-05  0:46   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:46 ` [PATCH 14/15] ocfs2: support partial clone range and dedupe range Darrick J. Wong
2018-10-05  0:46   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  0:46 ` [PATCH 15/15] xfs: support returning partial reflink results Darrick J. Wong
2018-10-05  0:46   ` [Ocfs2-devel] " Darrick J. Wong
2018-10-05  1:17 ` [PATCH 00/15] fs: fixes for serious clone/dedupe problems Dave Chinner
2018-10-05  1:17   ` [Ocfs2-devel] " Dave Chinner
2018-10-05  1:24   ` Darrick J. Wong
2018-10-05  1:24     ` [Ocfs2-devel] " Darrick J. Wong

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