From: "Darrick J. Wong" <djwong@us.ibm.com>
To: Andreas Dilger <adilger.kernel@dilger.ca>,
Theodore Tso <tytso@mit.edu>,
"Darrick J. Wong" <djwong@us.ibm.com>
Cc: Sunil Mushran <sunil.mushran@oracle.com>,
Martin K Petersen <martin.petersen@oracle.com>,
Greg Freemyer <greg.freemyer@gmail.com>,
Amir Goldstein <amir73il@gmail.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>, Mingming Cao <cmm@us.ibm.com>,
Joel Becker <jlbec@evilplan.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-ext4@vger.kernel.org, Coly Li <colyli@gmail.com>
Subject: [PATCH 13/28] ext4: Create bitmap checksum helper functions
Date: Sat, 08 Oct 2011 00:55:09 -0700 [thread overview]
Message-ID: <20111008075509.20506.61977.stgit@elm3c44.beaverton.ibm.com> (raw)
In-Reply-To: <20111008075343.20506.23155.stgit@elm3c44.beaverton.ibm.com>
These helper functions will be used to calculate and verify the block and inode
bitmap checksums.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
---
fs/ext4/bitmap.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index fa3af81..43d9173 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -29,3 +29,15 @@ unsigned int ext4_count_free(struct buffer_head *map, unsigned int numchars)
#endif /* EXT4FS_DEBUG */
+static __u32 ext4_bitmap_csum(struct super_block *sb, ext4_group_t group,
+ struct buffer_head *bh, int sz)
+{
+ __u32 crc;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ group = cpu_to_le32(group);
+ crc = ext4_chksum(sbi, sbi->s_uuid_crc, (__u8 *)&group, sizeof(group));
+ crc = ext4_chksum(sbi, crc, (__u8 *)bh->b_data, sz);
+
+ return crc;
+}
next prev parent reply other threads:[~2011-10-08 7:55 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-08 7:53 [PATCH v2 00/28] ext4: Add metadata checksumming Darrick J. Wong
2011-10-08 7:53 ` [PATCH 01/28] ext4: ext4_dx_add_entry should dirty directory metadata with the directory inode Darrick J. Wong
2011-10-08 7:53 ` [PATCH 02/28] ext4: ext4_rename should dirty dir_bh with the correct directory Darrick J. Wong
2011-10-08 7:54 ` [PATCH 03/28] ext4: ext4_mkdir should dirty dir_block with the parent inode Darrick J. Wong
2011-10-08 7:54 ` [PATCH 04/28] ext4: Prevent stack overrun in ext4_file_open when recording last known mountpoint Darrick J. Wong
2011-10-08 7:54 ` [PATCH 05/28] ext4: Fix endian problem in MMP initialization Darrick J. Wong
2011-10-08 7:54 ` [PATCH 06/28] ext4: Create a new BH_Verified flag to avoid unnecessary metadata validation Darrick J. Wong
2011-10-08 7:54 ` [PATCH 07/28] ext4: Create a rocompat flag for extended metadata checksumming Darrick J. Wong
2011-10-08 7:54 ` [PATCH 08/28] ext4: Record the checksum algorithm in use in the superblock Darrick J. Wong
2011-10-08 7:54 ` [PATCH 09/28] ext4: Only call out to crc32c if necessary Darrick J. Wong
2011-10-08 7:54 ` [PATCH 10/28] ext4: Calculate and verify superblock checksum Darrick J. Wong
2011-10-08 7:54 ` [PATCH 11/28] ext4: Calculate and verify inode checksums Darrick J. Wong
2011-10-12 19:45 ` Andreas Dilger
2011-10-12 21:03 ` Darrick J. Wong
2011-10-13 0:02 ` Andreas Dilger
2011-10-08 7:55 ` [PATCH 12/28] ext4: Use i_generation in inode-related metadata checksums Darrick J. Wong
2011-10-12 19:52 ` Andreas Dilger
2011-10-12 21:28 ` Darrick J. Wong
2011-10-13 0:06 ` Andreas Dilger
2011-10-08 7:55 ` Darrick J. Wong [this message]
2011-10-08 7:55 ` [PATCH 14/28] ext4: Calculate and verify checksums for inode bitmaps Darrick J. Wong
2011-10-08 7:55 ` [PATCH 15/28] ext4: Calculate and verify block bitmap checksum Darrick J. Wong
[not found] ` <AE869D1A-2A06-4849-8752-74924B0C05BD@dilger.ca>
2011-10-13 7:16 ` Darrick J. Wong
2011-11-07 20:00 ` Darrick J. Wong
2011-11-07 21:44 ` Andreas Dilger
2011-11-10 0:57 ` Darrick J. Wong
2011-11-10 2:34 ` Andreas Dilger
2011-10-08 7:55 ` [PATCH 16/28] ext4: Verify and calculate checksums for extent tree blocks Darrick J. Wong
2011-10-08 7:55 ` [PATCH 17/28] ext4: Calculate and verify checksums for htree nodes Darrick J. Wong
[not found] ` <F6453844-06CC-4245-BB39-EBA4327D4C92@dilger.ca>
2011-10-13 7:21 ` Darrick J. Wong
2011-10-08 7:55 ` [PATCH 18/28] ext4: Calculate and verify checksums of directory leaf blocks Darrick J. Wong
2011-10-08 7:55 ` [PATCH 19/28] ext4: Calculate and verify checksums of extended attribute blocks Darrick J. Wong
2011-10-08 7:55 ` [PATCH 20/28] ext4: Add new feature to make block group checksums use metadata_csum algorithm Darrick J. Wong
2011-10-08 7:56 ` [PATCH 21/28] ext4: Add checksums to the MMP block Darrick J. Wong
2011-10-08 7:56 ` [PATCH 22/28] jbd2: Update structure definitions and flags to support extended checksumming Darrick J. Wong
2011-10-08 7:56 ` [PATCH 23/28] jbd2: Grab a reference to the crc32c driver only when necessary Darrick J. Wong
2011-10-08 7:56 ` [PATCH 24/28] jbd2: Update structure definitions and flags to support extended checksumming Darrick J. Wong
2011-10-08 7:56 ` [PATCH 25/28] jbd2: Checksum revocation blocks Darrick J. Wong
2011-10-08 7:56 ` [PATCH 26/28] jbd2: Checksum descriptor blocks Darrick J. Wong
2011-10-08 7:56 ` [PATCH 27/28] jbd2: Checksum commit blocks Darrick J. Wong
2011-10-08 7:56 ` [PATCH 28/28] jbd2: Checksum data blocks that are stored in the journal Darrick J. Wong
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