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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 21/28] ocfs2: support partial clone range and dedupe range
Date: Sun, 21 Oct 2018 09:17:29 -0700	[thread overview]
Message-ID: <154013864979.29026.12312692222579341730.stgit@magnolia> (raw)
In-Reply-To: <154013850285.29026.16168387526580596209.stgit@magnolia>

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

Change the ocfs2 remap code to allow for returning partial results.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/ocfs2/file.c         |    7 +----
 fs/ocfs2/refcounttree.c |   72 +++++++++++++++++++++++++----------------------
 fs/ocfs2/refcounttree.h |   12 ++++----
 3 files changed, 46 insertions(+), 45 deletions(-)


diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index fbaeafe44b5f..8125c5ccf821 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2531,14 +2531,11 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
 				     struct file *file_out, loff_t pos_out,
 				     loff_t len, unsigned int remap_flags)
 {
-	int ret;
-
 	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
-	ret = ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
-					len, remap_flags);
-	return ret < 0 ? ret : len;
+	return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
+			len, remap_flags);
 }
 
 const struct inode_operations ocfs2_file_iops = {
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 7c709229e108..c7409578657b 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -4507,14 +4507,14 @@ static int ocfs2_reflink_update_dest(struct inode *dest,
 }
 
 /* Remap the range pos_in:len in s_inode to pos_out:len in t_inode. */
-static int ocfs2_reflink_remap_extent(struct inode *s_inode,
-				      struct buffer_head *s_bh,
-				      loff_t pos_in,
-				      struct inode *t_inode,
-				      struct buffer_head *t_bh,
-				      loff_t pos_out,
-				      loff_t len,
-				      struct ocfs2_cached_dealloc_ctxt *dealloc)
+static loff_t ocfs2_reflink_remap_extent(struct inode *s_inode,
+					 struct buffer_head *s_bh,
+					 loff_t pos_in,
+					 struct inode *t_inode,
+					 struct buffer_head *t_bh,
+					 loff_t pos_out,
+					 loff_t len,
+					 struct ocfs2_cached_dealloc_ctxt *dealloc)
 {
 	struct ocfs2_extent_tree s_et;
 	struct ocfs2_extent_tree t_et;
@@ -4522,8 +4522,9 @@ static int ocfs2_reflink_remap_extent(struct inode *s_inode,
 	struct buffer_head *ref_root_bh = NULL;
 	struct ocfs2_refcount_tree *ref_tree;
 	struct ocfs2_super *osb;
+	loff_t remapped_bytes = 0;
 	loff_t pstart, plen;
-	u32 p_cluster, num_clusters, slast, spos, tpos;
+	u32 p_cluster, num_clusters, slast, spos, tpos, remapped_clus = 0;
 	unsigned int ext_flags;
 	int ret = 0;
 
@@ -4605,30 +4606,34 @@ static int ocfs2_reflink_remap_extent(struct inode *s_inode,
 next_loop:
 		spos += num_clusters;
 		tpos += num_clusters;
+		remapped_clus += num_clusters;
 	}
 
-out:
-	return ret;
+	goto out;
 out_unlock_refcount:
 	ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
 	brelse(ref_root_bh);
-	return ret;
+out:
+	remapped_bytes = ocfs2_clusters_to_bytes(t_inode->i_sb, remapped_clus);
+	remapped_bytes = min_t(loff_t, len, remapped_bytes);
+
+	return remapped_bytes > 0 ? remapped_bytes : ret;
 }
 
 /* Set up refcount tree and remap s_inode to t_inode. */
-static int ocfs2_reflink_remap_blocks(struct inode *s_inode,
-				      struct buffer_head *s_bh,
-				      loff_t pos_in,
-				      struct inode *t_inode,
-				      struct buffer_head *t_bh,
-				      loff_t pos_out,
-				      loff_t len)
+static loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
+					 struct buffer_head *s_bh,
+					 loff_t pos_in,
+					 struct inode *t_inode,
+					 struct buffer_head *t_bh,
+					 loff_t pos_out,
+					 loff_t len)
 {
 	struct ocfs2_cached_dealloc_ctxt dealloc;
 	struct ocfs2_super *osb;
 	struct ocfs2_dinode *dis;
 	struct ocfs2_dinode *dit;
-	int ret;
+	loff_t ret;
 
 	osb = OCFS2_SB(s_inode->i_sb);
 	dis = (struct ocfs2_dinode *)s_bh->b_data;
@@ -4700,7 +4705,7 @@ static int ocfs2_reflink_remap_blocks(struct inode *s_inode,
 	/* Actually remap extents now. */
 	ret = ocfs2_reflink_remap_extent(s_inode, s_bh, pos_in, t_inode, t_bh,
 					 pos_out, len, &dealloc);
-	if (ret) {
+	if (ret < 0) {
 		mlog_errno(ret);
 		goto out;
 	}
@@ -4820,18 +4825,19 @@ static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
 }
 
 /* Link a range of blocks from one file to another. */
-int ocfs2_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)
+loff_t ocfs2_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)
 {
 	struct inode *inode_in = file_inode(file_in);
 	struct inode *inode_out = file_inode(file_out);
 	struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
 	struct buffer_head *in_bh = NULL, *out_bh = NULL;
 	bool same_inode = (inode_in == inode_out);
+	loff_t remapped = 0;
 	ssize_t ret;
 
 	if (!ocfs2_refcount_tree(osb))
@@ -4866,12 +4872,13 @@ int ocfs2_reflink_remap_range(struct file *file_in,
 				   round_down(pos_out, PAGE_SIZE),
 				   round_up(pos_out + len, PAGE_SIZE) - 1);
 
-	ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,
-					 out_bh, pos_out, len);
+	remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
+			inode_out, out_bh, pos_out, len);
 	up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
 	if (!same_inode)
 		up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
-	if (ret) {
+	if (remapped < 0) {
+		ret = remapped;
 		mlog_errno(ret);
 		goto out_unlock;
 	}
@@ -4889,10 +4896,7 @@ int ocfs2_reflink_remap_range(struct file *file_in,
 		goto out_unlock;
 	}
 
-	ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
-	return 0;
-
 out_unlock:
 	ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
-	return ret;
+	return remapped > 0 ? remapped : ret;
 }
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index eb65c1d0843c..9e64daba395d 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -115,11 +115,11 @@ int ocfs2_reflink_ioctl(struct inode *inode,
 			const char __user *oldname,
 			const char __user *newname,
 			bool preserve);
-int ocfs2_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);
+loff_t ocfs2_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);
 
 #endif /* OCFS2_REFCOUNTTREE_H */

WARNING: multiple messages have this Message-ID
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 21/28] ocfs2: support partial clone range and dedupe range
Date: Sun, 21 Oct 2018 09:17:29 -0700	[thread overview]
Message-ID: <154013864979.29026.12312692222579341730.stgit@magnolia> (raw)
In-Reply-To: <154013850285.29026.16168387526580596209.stgit@magnolia>

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

Change the ocfs2 remap code to allow for returning partial results.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/ocfs2/file.c         |    7 +----
 fs/ocfs2/refcounttree.c |   72 +++++++++++++++++++++++++----------------------
 fs/ocfs2/refcounttree.h |   12 ++++----
 3 files changed, 46 insertions(+), 45 deletions(-)


diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index fbaeafe44b5f..8125c5ccf821 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2531,14 +2531,11 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
 				     struct file *file_out, loff_t pos_out,
 				     loff_t len, unsigned int remap_flags)
 {
-	int ret;
-
 	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
-	ret = ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
-					len, remap_flags);
-	return ret < 0 ? ret : len;
+	return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
+			len, remap_flags);
 }
 
 const struct inode_operations ocfs2_file_iops = {
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 7c709229e108..c7409578657b 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -4507,14 +4507,14 @@ static int ocfs2_reflink_update_dest(struct inode *dest,
 }
 
 /* Remap the range pos_in:len in s_inode to pos_out:len in t_inode. */
-static int ocfs2_reflink_remap_extent(struct inode *s_inode,
-				      struct buffer_head *s_bh,
-				      loff_t pos_in,
-				      struct inode *t_inode,
-				      struct buffer_head *t_bh,
-				      loff_t pos_out,
-				      loff_t len,
-				      struct ocfs2_cached_dealloc_ctxt *dealloc)
+static loff_t ocfs2_reflink_remap_extent(struct inode *s_inode,
+					 struct buffer_head *s_bh,
+					 loff_t pos_in,
+					 struct inode *t_inode,
+					 struct buffer_head *t_bh,
+					 loff_t pos_out,
+					 loff_t len,
+					 struct ocfs2_cached_dealloc_ctxt *dealloc)
 {
 	struct ocfs2_extent_tree s_et;
 	struct ocfs2_extent_tree t_et;
@@ -4522,8 +4522,9 @@ static int ocfs2_reflink_remap_extent(struct inode *s_inode,
 	struct buffer_head *ref_root_bh = NULL;
 	struct ocfs2_refcount_tree *ref_tree;
 	struct ocfs2_super *osb;
+	loff_t remapped_bytes = 0;
 	loff_t pstart, plen;
-	u32 p_cluster, num_clusters, slast, spos, tpos;
+	u32 p_cluster, num_clusters, slast, spos, tpos, remapped_clus = 0;
 	unsigned int ext_flags;
 	int ret = 0;
 
@@ -4605,30 +4606,34 @@ static int ocfs2_reflink_remap_extent(struct inode *s_inode,
 next_loop:
 		spos += num_clusters;
 		tpos += num_clusters;
+		remapped_clus += num_clusters;
 	}
 
-out:
-	return ret;
+	goto out;
 out_unlock_refcount:
 	ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
 	brelse(ref_root_bh);
-	return ret;
+out:
+	remapped_bytes = ocfs2_clusters_to_bytes(t_inode->i_sb, remapped_clus);
+	remapped_bytes = min_t(loff_t, len, remapped_bytes);
+
+	return remapped_bytes > 0 ? remapped_bytes : ret;
 }
 
 /* Set up refcount tree and remap s_inode to t_inode. */
-static int ocfs2_reflink_remap_blocks(struct inode *s_inode,
-				      struct buffer_head *s_bh,
-				      loff_t pos_in,
-				      struct inode *t_inode,
-				      struct buffer_head *t_bh,
-				      loff_t pos_out,
-				      loff_t len)
+static loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
+					 struct buffer_head *s_bh,
+					 loff_t pos_in,
+					 struct inode *t_inode,
+					 struct buffer_head *t_bh,
+					 loff_t pos_out,
+					 loff_t len)
 {
 	struct ocfs2_cached_dealloc_ctxt dealloc;
 	struct ocfs2_super *osb;
 	struct ocfs2_dinode *dis;
 	struct ocfs2_dinode *dit;
-	int ret;
+	loff_t ret;
 
 	osb = OCFS2_SB(s_inode->i_sb);
 	dis = (struct ocfs2_dinode *)s_bh->b_data;
@@ -4700,7 +4705,7 @@ static int ocfs2_reflink_remap_blocks(struct inode *s_inode,
 	/* Actually remap extents now. */
 	ret = ocfs2_reflink_remap_extent(s_inode, s_bh, pos_in, t_inode, t_bh,
 					 pos_out, len, &dealloc);
-	if (ret) {
+	if (ret < 0) {
 		mlog_errno(ret);
 		goto out;
 	}
@@ -4820,18 +4825,19 @@ static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
 }
 
 /* Link a range of blocks from one file to another. */
-int ocfs2_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)
+loff_t ocfs2_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)
 {
 	struct inode *inode_in = file_inode(file_in);
 	struct inode *inode_out = file_inode(file_out);
 	struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
 	struct buffer_head *in_bh = NULL, *out_bh = NULL;
 	bool same_inode = (inode_in == inode_out);
+	loff_t remapped = 0;
 	ssize_t ret;
 
 	if (!ocfs2_refcount_tree(osb))
@@ -4866,12 +4872,13 @@ int ocfs2_reflink_remap_range(struct file *file_in,
 				   round_down(pos_out, PAGE_SIZE),
 				   round_up(pos_out + len, PAGE_SIZE) - 1);
 
-	ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,
-					 out_bh, pos_out, len);
+	remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
+			inode_out, out_bh, pos_out, len);
 	up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
 	if (!same_inode)
 		up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
-	if (ret) {
+	if (remapped < 0) {
+		ret = remapped;
 		mlog_errno(ret);
 		goto out_unlock;
 	}
@@ -4889,10 +4896,7 @@ int ocfs2_reflink_remap_range(struct file *file_in,
 		goto out_unlock;
 	}
 
-	ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
-	return 0;
-
 out_unlock:
 	ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
-	return ret;
+	return remapped > 0 ? remapped : ret;
 }
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index eb65c1d0843c..9e64daba395d 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -115,11 +115,11 @@ int ocfs2_reflink_ioctl(struct inode *inode,
 			const char __user *oldname,
 			const char __user *newname,
 			bool preserve);
-int ocfs2_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);
+loff_t ocfs2_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);
 
 #endif /* OCFS2_REFCOUNTTREE_H */

  parent reply	other threads:[~2018-10-21 16:17 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-21 16:15 [Ocfs2-devel] [PATCH v6 00/28] fs: fixes for serious clone/dedupe problems Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 01/28] vfs: vfs_clone_file_prep_inodes should return EINVAL for a clone from beyond EOF Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 02/28] vfs: check file ranges before cloning files Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 03/28] vfs: exit early from zero length remap operations Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 04/28] vfs: strengthen checking of file range inputs to generic_remap_checks Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 05/28] vfs: avoid problematic remapping requests into partial EOF block Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 06/28] vfs: skip zero-length dedupe requests Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 07/28] vfs: rename vfs_clone_file_prep to be more descriptive Darrick J. Wong
2018-10-21 16:15 ` [Ocfs2-devel] [PATCH 08/28] vfs: rename clone_verify_area to remap_verify_area Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 09/28] vfs: combine the clone and dedupe into a single remap_file_range Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 10/28] vfs: pass remap flags to generic_remap_file_range_prep Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 11/28] vfs: pass remap flags to generic_remap_checks Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 12/28] vfs: remap helper should update destination inode metadata Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 13/28] vfs: make remap_file_range functions take and return bytes completed Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 14/28] vfs: plumb remap flags through the vfs clone functions Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 15/28] vfs: plumb remap flags through the vfs dedupe functions Darrick J. Wong
2018-10-21 16:16 ` [Ocfs2-devel] [PATCH 16/28] vfs: enable remap callers that can handle short operations Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 17/28] vfs: hide file range comparison function Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 18/28] vfs: clean up generic_remap_file_range_prep return value Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 19/28] ocfs2: truncate page cache for clone destination file before remapping Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 20/28] ocfs2: fix pagecache truncation prior to reflink Darrick J. Wong
2018-10-21 16:17 ` Darrick J. Wong [this message]
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 22/28] ocfs2: remove ocfs2_reflink_remap_range Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 23/28] xfs: fix pagecache truncation prior to reflink Darrick J. Wong
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 24/28] xfs: clean up xfs_reflink_remap_blocks call site Darrick J. Wong
2018-10-22  2:11   ` Dave Chinner
2018-10-21 16:17 ` [Ocfs2-devel] [PATCH 25/28] xfs: support returning partial reflink results Darrick J. Wong
2018-10-22  2:14   ` Dave Chinner
2018-10-21 16:18 ` [Ocfs2-devel] [PATCH 26/28] xfs: remove redundant remap partial EOF block checks Darrick J. Wong
2018-10-21 16:18 ` [Ocfs2-devel] [PATCH 27/28] xfs: remove xfs_reflink_remap_range Darrick J. Wong
2018-10-22  2:17   ` Dave Chinner
2018-10-21 16:18 ` [Ocfs2-devel] [PATCH 28/28] xfs: remove [cm]time update from reflink calls Darrick J. Wong
2018-10-22  2:18   ` Dave Chinner
2018-10-22  2:21 ` [Ocfs2-devel] [PATCH v6 00/28] fs: fixes for serious clone/dedupe problems Dave Chinner
2018-10-22  4:37   ` Dave Chinner
2018-10-22  4:52     ` Al Viro
2018-10-22  5:08       ` Dave Chinner
2018-10-22  5:42         ` Amir Goldstein
2018-10-22  6:55           ` [Ocfs2-devel] " Dave Chinner

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