linux-ext4 - [PATCH 30/54] tune2fs: Rewrite extended attribute block checksums

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Date:	Tue, 06 Mar 2012 16:00:39 -0800
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	Andreas Dilger <adilger.kernel@...ger.ca>,
	Theodore Tso <tytso@....edu>,
	"Darrick J. Wong" <djwong@...ibm.com>
Cc:	Sunil Mushran <sunil.mushran@...cle.com>,
	Amir Goldstein <amir73il@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Mingming Cao <cmm@...ibm.com>,
	Joel Becker <jlbec@...lplan.org>, linux-ext4@...r.kernel.org,
	Coly Li <colyli@...il.com>
Subject: [PATCH 30/54] tune2fs: Rewrite extended attribute block checksums

When enabling metadata checksums, rewrite separate extended attribute blocks.

Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
---
 misc/tune2fs.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)


diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 801e6ea..2ae436e 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -610,9 +610,11 @@ static void rewrite_inodes(ext2_filsys fs)
 {
 	int length = EXT2_INODE_SIZE(fs->super);
 	struct ext2_inode *inode;
+	char		*ea_buf;
 	ext2_inode_scan	scan;
 	errcode_t	retval;
 	ext2_ino_t	ino;
+	blk64_t		file_acl_block;
 
 	if (fs->super->s_creator_os != EXT2_OS_LINUX)
 		return;
@@ -629,6 +631,12 @@ static void rewrite_inodes(ext2_filsys fs)
 		exit(1);
 	}
 
+	retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
+	if (retval) {
+		com_err("set_csum", retval, "while allocating memory");
+		exit(1);
+	}
+
 	do {
 		retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 		if (retval) {
@@ -659,9 +667,27 @@ static void rewrite_inodes(ext2_filsys fs)
 				exit(1);
 			}
 		}
+
+		file_acl_block = ext2fs_file_acl_block(fs, inode);
+		if (!file_acl_block)
+			continue;
+		retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
+		if (retval) {
+			com_err("rewrite_eablock", retval,
+				"while rewriting extended attribute");
+			exit(1);
+		}
+		retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
+						ino);
+		if (retval) {
+			com_err("rewrite_eablock", retval,
+				"while rewriting extended attribute");
+			exit(1);
+		}
 	} while (ino);
 
 	ext2fs_free_mem(&inode);
+	ext2fs_free_mem(&ea_buf);
 	ext2fs_close_inode_scan(scan);
 }
 

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