linux-kernel - [PATCH 5/5] ext3: abort ext3 if the journal has aborted

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Message-ID: <4843D009.9010200@hitachi.com>
Date:	Mon, 02 Jun 2008 19:48:41 +0900
From:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
To:	akpm@...ux-foundation.org, sct@...hat.com, adilger@...sterfs.com
Cc:	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	jack@...e.cz, jbacik@...hat.com, cmm@...ibm.com, tytso@....edu,
	sugita <yumiko.sugita.yf@...achi.com>,
	Satoshi OSHIMA <satoshi.oshima.fk@...achi.com>
Subject: [PATCH 5/5] ext3: abort ext3 if the journal has aborted

Subject: [PATCH 5/5] ext3: abort ext3 if the journal has aborted

If the journal has aborted due to a checkpointing failure, we
have to keep the contents of the journal space.  ext3_put_super()
detects the journal abort, then it invokes ext3_abort() to make
the filesystem read only and keep needs_recovery flag.

Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
---
 fs/ext3/ioctl.c |   12 ++++++------
 fs/ext3/super.c |   11 +++++++++--
 2 files changed, 15 insertions(+), 8 deletions(-)

Index: linux-2.6.26-rc4/fs/ext3/ioctl.c
===================================================================
--- linux-2.6.26-rc4.orig/fs/ext3/ioctl.c
+++ linux-2.6.26-rc4/fs/ext3/ioctl.c
@@ -239,7 +239,7 @@ setrsvsz_out:
 	case EXT3_IOC_GROUP_EXTEND: {
 		ext3_fsblk_t n_blocks_count;
 		struct super_block *sb = inode->i_sb;
-		int err;
+		int err, err2;
 
 		if (!capable(CAP_SYS_RESOURCE))
 			return -EPERM;
@@ -254,16 +254,16 @@ setrsvsz_out:
 		}
 		err = ext3_group_extend(sb, EXT3_SB(sb)->s_es, n_blocks_count);
 		journal_lock_updates(EXT3_SB(sb)->s_journal);
-		journal_flush(EXT3_SB(sb)->s_journal);
+		err2 = journal_flush(EXT3_SB(sb)->s_journal);
 		journal_unlock_updates(EXT3_SB(sb)->s_journal);
 group_extend_out:
 		mnt_drop_write(filp->f_path.mnt);
-		return err;
+		return (err) ? err : err2;
 	}
 	case EXT3_IOC_GROUP_ADD: {
 		struct ext3_new_group_data input;
 		struct super_block *sb = inode->i_sb;
-		int err;
+		int err, err2;
 
 		if (!capable(CAP_SYS_RESOURCE))
 			return -EPERM;
@@ -280,11 +280,11 @@ group_extend_out:
 
 		err = ext3_group_add(sb, &input);
 		journal_lock_updates(EXT3_SB(sb)->s_journal);
-		journal_flush(EXT3_SB(sb)->s_journal);
+		err2 = journal_flush(EXT3_SB(sb)->s_journal);
 		journal_unlock_updates(EXT3_SB(sb)->s_journal);
 group_add_out:
 		mnt_drop_write(filp->f_path.mnt);
-		return err;
+		return (err) ? err : err2;
 	}
 
 
Index: linux-2.6.26-rc4/fs/ext3/super.c
===================================================================
--- linux-2.6.26-rc4.orig/fs/ext3/super.c
+++ linux-2.6.26-rc4/fs/ext3/super.c
@@ -393,7 +393,8 @@ static void ext3_put_super (struct super
 	int i;
 
 	ext3_xattr_put_super(sb);
-	journal_destroy(sbi->s_journal);
+	if (journal_destroy(sbi->s_journal) < 0)
+		ext3_abort(sb, __func__, "Couldn't clean up the journal");
 	if (!(sb->s_flags & MS_RDONLY)) {
 		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
 		es->s_state = cpu_to_le16(sbi->s_mount_state);
@@ -2373,7 +2374,13 @@ static void ext3_write_super_lockfs(stru
 
 		/* Now we set up the journal barrier. */
 		journal_lock_updates(journal);
-		journal_flush(journal);
+
+		/*
+		 * We don't want to clear needs_recovery flag when we failed
+		 * to flush the journal.
+		 */
+		if (journal_flush(journal) < 0)
+			return;
 
 		/* Journal blocked and flushed, clear needs_recovery flag. */
 		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);


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