fs: Remove ext3 filesystem driver

The functionality of ext3 is fully supported by ext4 driver. Major
distributions (SUSE, RedHat) already use ext4 driver to handle ext3
filesystems for quite some time. There is some ugliness in mm resulting
from jbd cleaning buffers in a dirty page without cleaning page dirty
bit and also support for buffer bouncing in the block layer when stable
pages are required is there only because of jbd. So let's remove the
ext3 driver. This saves us some 28k lines of duplicated code.

Acked-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 0 insertions, 109 deletions

diff --git a/fs/ext3/fsync.c b/fs/ext3/fsync.c
deleted file mode 100644
index 1cb9c7e10c6f..000000000000
--- a/fs/ext3/fsync.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- *  linux/fs/ext3/fsync.c
- *
- *  Copyright (C) 1993  Stephen Tweedie (sct@redhat.com)
- *  from
- *  Copyright (C) 1992  Remy Card (card@masi.ibp.fr)
- *                      Laboratoire MASI - Institut Blaise Pascal
- *                      Universite Pierre et Marie Curie (Paris VI)
- *  from
- *  linux/fs/minix/truncate.c   Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  ext3fs fsync primitive
- *
- *  Big-endian to little-endian byte-swapping/bitmaps by
- *        David S. Miller (davem@caip.rutgers.edu), 1995
- *
- *  Removed unnecessary code duplication for little endian machines
- *  and excessive __inline__s.
- *        Andi Kleen, 1997
- *
- * Major simplications and cleanup - we only need to do the metadata, because
- * we can depend on generic_block_fdatasync() to sync the data blocks.
- */
-
-#include <linux/blkdev.h>
-#include <linux/writeback.h>
-#include "ext3.h"
-
-/*
- * akpm: A new design for ext3_sync_file().
- *
- * This is only called from sys_fsync(), sys_fdatasync() and sys_msync().
- * There cannot be a transaction open by this task.
- * Another task could have dirtied this inode.  Its data can be in any
- * state in the journalling system.
- *
- * What we do is just kick off a commit and wait on it.  This will snapshot the
- * inode to disk.
- */
-
-int ext3_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
-{
-	struct inode *inode = file->f_mapping->host;
-	struct ext3_inode_info *ei = EXT3_I(inode);
-	journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
-	int ret, needs_barrier = 0;
-	tid_t commit_tid;
-
-	trace_ext3_sync_file_enter(file, datasync);
-
-	if (inode->i_sb->s_flags & MS_RDONLY) {
-		/* Make sure that we read updated state */
-		smp_rmb();
-		if (EXT3_SB(inode->i_sb)->s_mount_state & EXT3_ERROR_FS)
-			return -EROFS;
-		return 0;
-	}
-	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-	if (ret)
-		goto out;
-
-	J_ASSERT(ext3_journal_current_handle() == NULL);
-
-	/*
-	 * data=writeback,ordered:
-	 *  The caller's filemap_fdatawrite()/wait will sync the data.
-	 *  Metadata is in the journal, we wait for a proper transaction
-	 *  to commit here.
-	 *
-	 * data=journal:
-	 *  filemap_fdatawrite won't do anything (the buffers are clean).
-	 *  ext3_force_commit will write the file data into the journal and
-	 *  will wait on that.
-	 *  filemap_fdatawait() will encounter a ton of newly-dirtied pages
-	 *  (they were dirtied by commit).  But that's OK - the blocks are
-	 *  safe in-journal, which is all fsync() needs to ensure.
-	 */
-	if (ext3_should_journal_data(inode)) {
-		ret = ext3_force_commit(inode->i_sb);
-		goto out;
-	}
-
-	if (datasync)
-		commit_tid = atomic_read(&ei->i_datasync_tid);
-	else
-		commit_tid = atomic_read(&ei->i_sync_tid);
-
-	if (test_opt(inode->i_sb, BARRIER) &&
-	    !journal_trans_will_send_data_barrier(journal, commit_tid))
-		needs_barrier = 1;
-	log_start_commit(journal, commit_tid);
-	ret = log_wait_commit(journal, commit_tid);
-
-	/*
-	 * In case we didn't commit a transaction, we have to flush
-	 * disk caches manually so that data really is on persistent
-	 * storage
-	 */
-	if (needs_barrier) {
-		int err;
-
-		err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
-		if (!ret)
-			ret = err;
-	}
-out:
-	trace_ext3_sync_file_exit(inode, ret);
-	return ret;
-}