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From: Allison Henderson <allison.henderson@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH v16 04/28] xfsprogs: Check for extent overflow when punching a hole
Date: Thu, 25 Mar 2021 17:31:07 -0700	[thread overview]
Message-ID: <20210326003131.32642-5-allison.henderson@oracle.com> (raw)
In-Reply-To: <20210326003131.32642-1-allison.henderson@oracle.com>

From: Chandan Babu R <chandanrlinux@gmail.com>

Source kernel commit: 85ef08b5a667615bc7be5058259753dc42a7adcd

The extent mapping the file offset at which a hole has to be
inserted will be split into two extents causing extent count to
increase by 1.

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
---
 libxfs/xfs_inode_fork.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libxfs/xfs_inode_fork.h b/libxfs/xfs_inode_fork.h
index 7fc2b12..bcac769 100644
--- a/libxfs/xfs_inode_fork.h
+++ b/libxfs/xfs_inode_fork.h
@@ -41,6 +41,13 @@ struct xfs_ifork {
 #define XFS_IEXT_ADD_NOSPLIT_CNT	(1)
 
 /*
+ * Punching out an extent from the middle of an existing extent can cause the
+ * extent count to increase by 1.
+ * i.e. | Old extent | Hole | Old extent |
+ */
+#define XFS_IEXT_PUNCH_HOLE_CNT		(1)
+
+/*
  * Fork handling.
  */
 
-- 
2.7.4


  parent reply	other threads:[~2021-03-26  0:32 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26  0:31 [PATCH v16 00/28] xfsprogs: Delay Ready Attributes Allison Henderson
2021-03-26  0:31 ` [PATCH v16 01/28] xfsprogs: fix an ABBA deadlock in xfs_rename Allison Henderson
2021-03-26  0:31 ` [PATCH v16 02/28] xfsprogs: Add helper for checking per-inode extent count overflow Allison Henderson
2021-03-26  0:31 ` [PATCH v16 03/28] xfsprogs: Check for extent overflow when trivally adding a new extent Allison Henderson
2021-03-26  0:31 ` Allison Henderson [this message]
2021-03-26  0:31 ` [PATCH v16 05/28] xfsprogs: Check for extent overflow when adding dir entries Allison Henderson
2021-03-26  0:31 ` [PATCH v16 06/28] xfsprogs: Check for extent overflow when removing " Allison Henderson
2021-03-26  0:31 ` [PATCH v16 07/28] xfsprogs: Check for extent overflow when renaming " Allison Henderson
2021-03-26  0:31 ` [PATCH v16 08/28] xfsprogs: Check for extent overflow when adding/removing xattrs Allison Henderson
2021-03-26  0:31 ` [PATCH v16 09/28] xfsprogs: Check for extent overflow when writing to unwritten extent Allison Henderson
2021-03-26  0:31 ` [PATCH v16 10/28] xfsprogs: Check for extent overflow when moving extent from cow to data fork Allison Henderson
2021-03-26  0:31 ` [PATCH v16 11/28] xfsprogs: Check for extent overflow when swapping extents Allison Henderson
2021-03-26  0:31 ` [PATCH v16 12/28] xfsprogs: Introduce error injection to reduce maximum inode fork extent count Allison Henderson
2021-03-26  0:31 ` [PATCH v16 13/28] xfsprogs: Remove duplicate assert statement in xfs_bmap_btalloc() Allison Henderson
2021-03-26  0:31 ` [PATCH v16 14/28] xfsprogs: Compute bmap extent alignments in a separate function Allison Henderson
2021-03-26  0:31 ` [PATCH v16 15/28] xfsprogs: Process allocated extent " Allison Henderson
2021-03-26  0:31 ` [PATCH v16 16/28] xfsprogs: Introduce error injection to allocate only minlen size extents for files Allison Henderson
2021-03-26  0:31 ` [PATCH v16 17/28] libxfs: expose inobtcount in xfs geometry Allison Henderson
2021-03-26  0:31 ` [PATCH v16 18/28] xfsprogs: Reverse apply 72b97ea40d Allison Henderson
2021-03-26  0:31 ` [PATCH v16 19/28] xfsprogs: Add xfs_attr_node_remove_cleanup Allison Henderson
2021-03-26  0:31 ` [PATCH v16 20/28] xfsprogs: Hoist xfs_attr_set_shortform Allison Henderson
2021-03-26  0:31 ` [PATCH v16 21/28] xfsprogs: Add helper xfs_attr_set_fmt Allison Henderson
2021-03-26  0:31 ` [PATCH v16 22/28] xfsprogs: Separate xfs_attr_node_addname and xfs_attr_node_addname_clear_incomplete Allison Henderson
2021-03-26  0:31 ` [PATCH v16 23/28] xfsprogs: Add helper xfs_attr_node_addname_find_attr Allison Henderson
2021-03-26  0:31 ` [PATCH v16 24/28] xfsprogs: Hoist xfs_attr_node_addname Allison Henderson
2021-03-26  0:31 ` [PATCH v16 25/28] xfsprogs: Hoist xfs_attr_leaf_addname Allison Henderson
2021-03-26  0:31 ` [PATCH v16 26/28] xfsprogs: Hoist node transaction handling Allison Henderson
2021-03-26  0:31 ` [PATCH v16 27/28] xfsprogs: Add delay ready attr remove routines Allison Henderson
2021-03-26  0:31 ` [PATCH v16 28/28] xfsprogs: Add delay ready attr set routines Allison Henderson

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