[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20110901003104.31048.86177.stgit@elm3c44.beaverton.ibm.com>
Date: Wed, 31 Aug 2011 17:31:04 -0700
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>,
linux-kernel <linux-kernel@...r.kernel.org>,
Andi Kleen <andi@...stfloor.org>,
Mingming Cao <cmm@...ibm.com>,
Joel Becker <jlbec@...lplan.org>,
linux-fsdevel <linux-fsdevel@...r.kernel.org>,
linux-ext4@...r.kernel.org, Coly Li <colyli@...il.com>
Subject: [PATCH 05/16] ext4: Create a rocompat flag for extended metadata
checksumming
This patch introduces a rocompat feature flag to signal the presence of
checksums for metadata blocks. It also pulls in CRC32c since we'll be
using that for the new checksums.
Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
---
fs/ext4/Kconfig | 1 +
fs/ext4/ext4.h | 4 +++-
2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index 9ed1bb1..97f4a7d 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -2,6 +2,7 @@ config EXT4_FS
tristate "The Extended 4 (ext4) filesystem"
select JBD2
select CRC16
+ select LIBCRC32C
help
This is the next generation of the ext3 filesystem.
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ecb86c2..f79ddac 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1359,6 +1359,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
+#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -1401,7 +1402,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
/*
* Default values for user and/or group using reserved blocks
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists