ext3-journal-chksum-2.6.18-vanilla.patch

lustre 1.6.5 source code

Index: linux-2.6.18/fs/ext3/super.c
===================================================================
--- linux-2.6.18.orig/fs/ext3/super.c
+++ linux-2.6.18/fs/ext3/super.c
@@ -688,6 +688,9 @@ enum {
 	Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
 	Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
 	Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
+#ifdef JFS_FEATURE_COMPAT_CHECKSUM
+	Opt_journal_checksum, Opt_journal_async_commit,
+#endif
 	Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
 	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
@@ -730,6 +733,10 @@ static match_table_t tokens = {
 	{Opt_journal_update, "journal=update"},
 	{Opt_journal_inum, "journal=%u"},
 	{Opt_journal_dev, "journal_dev=%u"},
+#ifdef JFS_FEATURE_COMPAT_CHECKSUM
+	{Opt_journal_checksum, "journal_checksum"},
+	{Opt_journal_async_commit, "journal_async_commit"},
+#endif
 	{Opt_abort, "abort"},
 	{Opt_data_journal, "data=journal"},
 	{Opt_data_ordered, "data=ordered"},
@@ -924,6 +931,15 @@ static int parse_options (char *options,
 				return 0;
 			*journal_devnum = option;
 			break;
+#ifdef JFS_FEATURE_COMPAT_CHECKSUM
+		case Opt_journal_checksum:
+			set_opt (sbi->s_mount_opt, JOURNAL_CHECKSUM);
+			break;
+		case Opt_journal_async_commit:
+			set_opt (sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT);
+			set_opt (sbi->s_mount_opt, JOURNAL_CHECKSUM);
+			break;
+#endif
 		case Opt_noload:
 			set_opt (sbi->s_mount_opt, NOLOAD);
 			break;
@@ -2180,6 +2196,23 @@ static int ext3_fill_super (struct super
 		goto failed_mount3;
 	}
 
+#ifdef JFS_FEATURE_COMPAT_CHECKSUM
+	if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
+		journal_set_features(sbi->s_journal,
+				JFS_FEATURE_COMPAT_CHECKSUM, 0,
+				JFS_FEATURE_INCOMPAT_ASYNC_COMMIT);
+	} else if (test_opt(sb, JOURNAL_CHECKSUM)) {
+		journal_set_features(sbi->s_journal,
+				JFS_FEATURE_COMPAT_CHECKSUM, 0, 0);
+		journal_clear_features(sbi->s_journal, 0, 0,
+				JFS_FEATURE_INCOMPAT_ASYNC_COMMIT);
+	} else {
+		journal_clear_features(sbi->s_journal,
+				JFS_FEATURE_COMPAT_CHECKSUM, 0,
+				JFS_FEATURE_INCOMPAT_ASYNC_COMMIT);
+	}
+#endif
+
 	/* We have now updated the journal if required, so we can
 	 * validate the data journaling mode. */
 	switch (test_opt(sb, DATA_FLAGS)) {
Index: linux-2.6.18/include/linux/ext3_fs.h
===================================================================
--- linux-2.6.18.orig/include/linux/ext3_fs.h
+++ linux-2.6.18/include/linux/ext3_fs.h
@@ -476,6 +476,11 @@ do {									       \
 #define EXT3_MOUNT_EXTDEBUG             0x4000000/* Extents debug */
 #define EXT3_MOUNT_MBALLOC		0x8000000/* Buddy allocation support */
 
+#ifdef JFS_FEATURE_COMPAT_CHECKSUM
+#define EXT3_MOUNT_JOURNAL_CHECKSUM     0x10000000 /* Journal checksums */
+#define EXT3_MOUNT_JOURNAL_ASYNC_COMMIT 0x20000000 /* Journal Async Commit */
+#endif
+
 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
 #ifndef clear_opt
 #define clear_opt(o, opt)		o &= ~EXT3_MOUNT_##opt