LU-9384 ldiskfs: extra patch for changing extra isize

Port a patch from upstream for changing extra size:

commit  887a9730614727c4fff7cb756711b190593fc1df
	"ext4: keep existing extra fields when inode expands"

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: I9555cb4efd1cbca257536ec699627e8fdb5a5b46
Reviewed-on: https://review.whamcloud.com/27285
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>

diff --git a/ldiskfs/kernel_patches/patches/rhel7/ext4-fix-xattr-shifting-when-expanding-inodes.patch b/ldiskfs/kernel_patches/patches/rhel7/ext4-fix-xattr-shifting-when-expanding-inodes.patch
index a361f1c..6f36e90 100644 (file)
--- a/ldiskfs/kernel_patches/patches/rhel7/ext4-fix-xattr-shifting-when-expanding-inodes.patch
+++ b/ldiskfs/kernel_patches/patches/rhel7/ext4-fix-xattr-shifting-when-expanding-inodes.patch
@@ -407,3 +407,38 @@ index 1447860..82b025c 100644
 -- 
 2.9.3
 
+From 887a9730614727c4fff7cb756711b190593fc1df Mon Sep 17 00:00:00 2001
+From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
+Date: Sun, 21 May 2017 22:36:23 -0400
+Subject: [PATCH] ext4: keep existing extra fields when inode expands
+
+ext4_expand_extra_isize() should clear only space between old and new
+size.
+
+Fixes: 6dd4ee7cab7e # v2.6.23
+Cc: stable@vger.kernel.org
+Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+---
+ fs/ext4/inode.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
+index 1bd0bfa..7cd99de 100644
+--- a/fs/ext4/inode.c
++++ b/fs/ext4/inode.c
+@@ -5637,8 +5637,9 @@ static int ext4_expand_extra_isize(struct inode *inode,
+       /* No extended attributes present */
+       if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR) ||
+           header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)) {
+-              memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE, 0,
+-                      new_extra_isize);
++              memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE +
++                     EXT4_I(inode)->i_extra_isize, 0,
++                     new_extra_isize - EXT4_I(inode)->i_extra_isize);
+               EXT4_I(inode)->i_extra_isize = new_extra_isize;
+               return 0;
+       }
+-- 
+2.9.3
+