Adding upstream version 1.47.0.upstream/1.47.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1461 insertions, 0 deletions

diff --git a/e2fsck/super.c b/e2fsck/super.c
new file mode 100644
index 0000000..9495e02
--- /dev/null
+++ b/e2fsck/super.c
@@ -0,0 +1,1461 @@
+/*
+ * e2fsck.c - superblock checks
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "config.h"
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#ifndef EXT2_SKIP_UUID
+#include "uuid/uuid.h"
+#endif
+#include "e2fsck.h"
+#include "problem.h"
+
+#define MIN_CHECK 1
+#define MAX_CHECK 2
+#define LOG2_CHECK 4
+
+static int check_super_value(e2fsck_t ctx, const char *descr,
+			      unsigned long value, int flags,
+			      unsigned long min_val, unsigned long max_val)
+{
+	struct		problem_context pctx;
+
+	if ((flags & MIN_CHECK && value < min_val) ||
+	    (flags & MAX_CHECK && value > max_val) ||
+	    (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
+		clear_problem_context(&pctx);
+		pctx.num = value;
+		pctx.str = descr;
+		fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return 0;
+	}
+	return 1;
+}
+
+static int check_super_value64(e2fsck_t ctx, const char *descr,
+				__u64 value, int flags,
+				__u64 min_val, __u64 max_val)
+{
+	struct		problem_context pctx;
+
+	if ((flags & MIN_CHECK && value < min_val) ||
+	    (flags & MAX_CHECK && value > max_val) ||
+	    (flags & LOG2_CHECK && (value & (value - 1)) != 0)) {
+		clear_problem_context(&pctx);
+		pctx.num = value;
+		pctx.str = descr;
+		fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * helper function to release an inode
+ */
+struct process_block_struct {
+	e2fsck_t 	ctx;
+	char 		*buf;
+	struct problem_context *pctx;
+	int		truncating;
+	int		truncate_offset;
+	e2_blkcnt_t	truncate_block;
+	int		truncated_blocks;
+	int		abort;
+	errcode_t	errcode;
+	blk64_t last_cluster;
+	struct ext2_inode_large *inode;
+};
+
+static int release_inode_block(ext2_filsys fs,
+			       blk64_t	*block_nr,
+			       e2_blkcnt_t blockcnt,
+			       blk64_t	ref_blk EXT2FS_ATTR((unused)),
+			       int	ref_offset EXT2FS_ATTR((unused)),
+			       void *priv_data)
+{
+	struct process_block_struct *pb;
+	e2fsck_t 		ctx;
+	struct problem_context	*pctx;
+	blk64_t			blk = *block_nr;
+	blk64_t			cluster = EXT2FS_B2C(fs, *block_nr);
+	int			retval = 0;
+
+	pb = (struct process_block_struct *) priv_data;
+	ctx = pb->ctx;
+	pctx = pb->pctx;
+
+	pctx->blk = blk;
+	pctx->blkcount = blockcnt;
+
+	if (blk == 0)
+		return 0;
+
+	if (pb->last_cluster == cluster)
+		return 0;
+
+	pb->last_cluster = cluster;
+
+	if ((blk < fs->super->s_first_data_block) ||
+	    (blk >= ext2fs_blocks_count(fs->super))) {
+		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
+	return_abort:
+		pb->abort = 1;
+		return BLOCK_ABORT;
+	}
+
+	if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
+		fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
+		goto return_abort;
+	}
+
+	/*
+	 * If we are deleting an orphan, then we leave the fields alone.
+	 * If we are truncating an orphan, then update the inode fields
+	 * and clean up any partial block data.
+	 */
+	if (pb->truncating) {
+		/*
+		 * We only remove indirect blocks if they are
+		 * completely empty.
+		 */
+		if (blockcnt < 0) {
+			int	i, limit;
+			blk_t	*bp;
+
+			pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
+							pb->buf);
+			if (pb->errcode)
+				goto return_abort;
+
+			limit = fs->blocksize >> 2;
+			for (i = 0, bp = (blk_t *) pb->buf;
+			     i < limit;	 i++, bp++)
+				if (*bp)
+					return 0;
+		}
+		/*
+		 * We don't remove direct blocks until we've reached
+		 * the truncation block.
+		 */
+		if (blockcnt >= 0 && blockcnt < pb->truncate_block)
+			return 0;
+		/*
+		 * If part of the last block needs truncating, we do
+		 * it here.
+		 */
+		if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
+			pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
+							pb->buf);
+			if (pb->errcode)
+				goto return_abort;
+			memset(pb->buf + pb->truncate_offset, 0,
+			       fs->blocksize - pb->truncate_offset);
+			pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
+							 pb->buf);
+			if (pb->errcode)
+				goto return_abort;
+		}
+		pb->truncated_blocks++;
+		*block_nr = 0;
+		retval |= BLOCK_CHANGED;
+	}
+
+	if (ctx->qctx)
+		quota_data_sub(ctx->qctx, pb->inode, 0, ctx->fs->blocksize);
+	ext2fs_block_alloc_stats2(fs, blk, -1);
+	ctx->free_blocks++;
+	return retval;
+}
+
+/*
+ * This function releases an inode.  Returns 1 if an inconsistency was
+ * found.  If the inode has a link count, then it is being truncated and
+ * not deleted.
+ */
+static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
+				struct ext2_inode_large *inode, char *block_buf,
+				struct problem_context *pctx)
+{
+	struct process_block_struct 	pb;
+	ext2_filsys			fs = ctx->fs;
+	blk64_t				blk;
+	errcode_t			retval;
+	__u32				count;
+
+	if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(inode)))
+		return 0;
+
+	pb.buf = block_buf + 3 * ctx->fs->blocksize;
+	pb.ctx = ctx;
+	pb.abort = 0;
+	pb.errcode = 0;
+	pb.pctx = pctx;
+	pb.last_cluster = 0;
+	pb.inode = inode;
+	if (inode->i_links_count) {
+		pb.truncating = 1;
+		pb.truncate_block = (e2_blkcnt_t)
+			((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
+			 fs->blocksize);
+		pb.truncate_offset = inode->i_size % fs->blocksize;
+	} else {
+		pb.truncating = 0;
+		pb.truncate_block = 0;
+		pb.truncate_offset = 0;
+	}
+	pb.truncated_blocks = 0;
+	retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
+				      block_buf, release_inode_block, &pb);
+	if (retval) {
+		com_err("release_inode_blocks", retval,
+			_("while calling ext2fs_block_iterate for inode %u"),
+			ino);
+		return 1;
+	}
+	if (pb.abort)
+		return 1;
+
+	/* Refresh the inode since ext2fs_block_iterate may have changed it */
+	e2fsck_read_inode_full(ctx, ino, EXT2_INODE(inode), sizeof(*inode),
+			"release_inode_blocks");
+
+	if (pb.truncated_blocks)
+		ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode),
+				pb.truncated_blocks);
+
+	blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
+	if (blk) {
+		retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
+				&count, ino);
+		if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
+			retval = 0;
+			count = 1;
+		}
+		if (retval) {
+			com_err("release_inode_blocks", retval,
+		_("while calling ext2fs_adjust_ea_refcount2 for inode %u"),
+				ino);
+			return 1;
+		}
+		if (count == 0) {
+			if (ctx->qctx)
+				quota_data_sub(ctx->qctx, inode, 0,
+						ctx->fs->blocksize);
+			ext2fs_block_alloc_stats2(fs, blk, -1);
+			ctx->free_blocks++;
+		}
+		ext2fs_file_acl_block_set(fs, EXT2_INODE(inode), 0);
+	}
+	return 0;
+}
+
+/* Load all quota data in preparation for orphan clearing. */
+static errcode_t e2fsck_read_all_quotas(e2fsck_t ctx)
+{
+	ext2_ino_t qf_ino;
+	enum quota_type qtype;
+	errcode_t retval = 0;
+
+	if (!ext2fs_has_feature_quota(ctx->fs->super))
+		return retval;
+
+	retval = quota_init_context(&ctx->qctx, ctx->fs, 0);
+	if (retval)
+		return retval;
+
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+		qf_ino = *quota_sb_inump(ctx->fs->super, qtype);
+		if (qf_ino == 0)
+			continue;
+
+		retval = quota_read_all_dquots(ctx->qctx, qf_ino, qtype,
+					       QREAD_USAGE | QREAD_LIMITS);
+		if (retval)
+			break;
+	}
+	if (retval)
+		quota_release_context(&ctx->qctx);
+	return retval;
+}
+
+/* Write all the quota info to disk. */
+static errcode_t e2fsck_write_all_quotas(e2fsck_t ctx)
+{
+	struct problem_context pctx;
+	enum quota_type qtype;
+
+	if (!ext2fs_has_feature_quota(ctx->fs->super))
+		return 0;
+
+	clear_problem_context(&pctx);
+	for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
+		pctx.num = qtype;
+		pctx.errcode = quota_write_inode(ctx->qctx, 1 << qtype);
+		if (pctx.errcode) {
+			fix_problem(ctx, PR_6_WRITE_QUOTAS, &pctx);
+			break;
+		}
+	}
+
+	quota_release_context(&ctx->qctx);
+	return pctx.errcode;
+}
+
+static int release_orphan_inode(e2fsck_t ctx, ext2_ino_t *ino, char *block_buf)
+{
+	ext2_filsys fs = ctx->fs;
+	struct problem_context pctx;
+	struct ext2_inode_large inode;
+	ext2_ino_t next_ino;
+
+	e2fsck_read_inode_full(ctx, *ino, EXT2_INODE(&inode),
+				sizeof(inode), "release_orphan_inode");
+	clear_problem_context(&pctx);
+	pctx.ino = *ino;
+	pctx.inode = EXT2_INODE(&inode);
+	pctx.str = inode.i_links_count ? _("Truncating") : _("Clearing");
+
+	fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
+
+	next_ino = inode.i_dtime;
+	if (next_ino &&
+	    ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
+	     (next_ino > fs->super->s_inodes_count))) {
+		pctx.ino = next_ino;
+		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
+		return 1;
+	}
+
+	if (release_inode_blocks(ctx, *ino, &inode, block_buf, &pctx))
+		return 1;
+
+	if (!inode.i_links_count) {
+		if (ctx->qctx)
+			quota_data_inodes(ctx->qctx, &inode, *ino, -1);
+		ext2fs_inode_alloc_stats2(fs, *ino, -1,
+					  LINUX_S_ISDIR(inode.i_mode));
+		ctx->free_inodes++;
+		inode.i_dtime = ctx->now;
+	} else {
+		inode.i_dtime = 0;
+	}
+	e2fsck_write_inode_full(ctx, *ino, EXT2_INODE(&inode),
+				sizeof(inode), "delete_file");
+	*ino = next_ino;
+	return 0;
+}
+
+struct process_orphan_block_data {
+	e2fsck_t 	ctx;
+	char 		*buf;
+	char		*block_buf;
+	e2_blkcnt_t	blocks;
+	int		abort;
+	int		clear;
+	errcode_t	errcode;
+	ext2_ino_t	ino;
+	__u32		generation;
+};
+
+static int process_orphan_block(ext2_filsys fs,
+			       blk64_t	*block_nr,
+			       e2_blkcnt_t blockcnt,
+			       blk64_t	ref_blk EXT2FS_ATTR((unused)),
+			       int	ref_offset EXT2FS_ATTR((unused)),
+			       void *priv_data)
+{
+	struct process_orphan_block_data *pd;
+	e2fsck_t 		ctx;
+	struct problem_context	pctx;
+	blk64_t			blk = *block_nr;
+	struct ext4_orphan_block_tail *tail;
+	int			j;
+	int			inodes_per_ob;
+	__u32			*bdata;
+	ext2_ino_t		ino;
+
+	pd = priv_data;
+	ctx = pd->ctx;
+	clear_problem_context(&pctx);
+	pctx.ino = fs->super->s_orphan_file_inum;
+	pctx.blk = blockcnt;
+
+	/* Orphan file must not have holes */
+	if (!blk) {
+		if (blockcnt == pd->blocks)
+			return BLOCK_ABORT;
+		fix_problem(ctx, PR_0_ORPHAN_FILE_HOLE, &pctx);
+return_abort:
+		pd->abort = 1;
+		return BLOCK_ABORT;
+	}
+	inodes_per_ob = ext2fs_inodes_per_orphan_block(fs);
+	pd->errcode = io_channel_read_blk64(fs->io, blk, 1, pd->buf);
+	if (pd->errcode)
+		goto return_abort;
+	tail = ext2fs_orphan_block_tail(fs, pd->buf);
+	if (ext2fs_le32_to_cpu(tail->ob_magic) !=
+	    EXT4_ORPHAN_BLOCK_MAGIC) {
+		fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_MAGIC, &pctx);
+		goto return_abort;
+	}
+	if (!ext2fs_orphan_file_block_csum_verify(fs,
+			fs->super->s_orphan_file_inum, blk, pd->buf)) {
+		fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_CHECKSUM, &pctx);
+		goto return_abort;
+	}
+	bdata = (__u32 *)pd->buf;
+	for (j = 0; j < inodes_per_ob; j++) {
+		if (!bdata[j])
+			continue;
+		ino = ext2fs_le32_to_cpu(bdata[j]);
+		if (release_orphan_inode(ctx, &ino, pd->block_buf))
+			goto return_abort;
+	}
+	return 0;
+}
+
+static int process_orphan_file(e2fsck_t ctx, char *block_buf)
+{
+	ext2_filsys fs = ctx->fs;
+	char *orphan_buf;
+	struct process_orphan_block_data pd;
+	int ret = 0;
+	ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
+	struct ext2_inode orphan_inode;
+	struct problem_context	pctx;
+	errcode_t retval;
+
+	if (!ext2fs_has_feature_orphan_file(fs->super))
+		return 0;
+
+	clear_problem_context(&pctx);
+	pctx.ino = orphan_inum;
+
+	orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+						    "orphan block buffer");
+	retval = ext2fs_read_inode(fs, orphan_inum, &orphan_inode);
+	if (retval < 0) {
+		com_err("process_orphan_file", retval,
+			_("while reading inode %d"), orphan_inum);
+		ret = 1;
+		goto out;
+	}
+	if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
+		fix_problem(ctx, PR_0_ORPHAN_FILE_WRONG_SIZE, &pctx);
+		ret = 1;
+		goto out;
+	}
+	pd.buf = orphan_buf + 3 * fs->blocksize;
+	pd.block_buf = block_buf;
+	pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
+	pd.ctx = ctx;
+	pd.abort = 0;
+	pd.errcode = 0;
+	retval = ext2fs_block_iterate3(fs, orphan_inum,
+				       BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+				       orphan_buf, process_orphan_block, &pd);
+	if (retval) {
+		com_err("process_orphan_block", retval,
+			_("while calling ext2fs_block_iterate for inode %d"),
+			orphan_inum);
+		ret = 1;
+		goto out;
+	}
+	if (pd.abort) {
+		if (pd.errcode) {
+			com_err("process_orphan_block", pd.errcode,
+				_("while reading blocks of inode %d"),
+				orphan_inum);
+		}
+		ret = 1;
+	}
+out:
+	ext2fs_free_mem(&orphan_buf);
+	return ret;
+}
+
+/*
+ * This function releases all of the orphan inodes.  It returns 1 if
+ * it hit some error, and 0 on success.
+ */
+static int release_orphan_inodes(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	ext2_ino_t ino;
+	struct problem_context pctx;
+	char *block_buf;
+
+	if (fs->super->s_last_orphan == 0 &&
+	    !ext2fs_has_feature_orphan_present(fs->super))
+		return 0;
+
+	clear_problem_context(&pctx);
+	ino = fs->super->s_last_orphan;
+	pctx.ino = ino;
+	pctx.errcode = e2fsck_read_all_quotas(ctx);
+	if (pctx.errcode) {
+		fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
+		return 1;
+	}
+
+	/*
+	 * Win or lose, we won't be using the head of the orphan inode
+	 * list again.
+	 */
+	fs->super->s_last_orphan = 0;
+	ext2fs_mark_super_dirty(fs);
+
+	/*
+	 * If the filesystem contains errors, don't process the orphan list
+	 * or orphan file, since neither can be trusted; and we're going to
+	 * be running a full e2fsck run anyway... We clear orphan file contents
+	 * after filesystem is checked to avoid clearing someone else's data.
+	 */
+	if (fs->super->s_state & EXT2_ERROR_FS) {
+		if (ctx->qctx)
+			quota_release_context(&ctx->qctx);
+		return 0;
+	}
+
+	if (ino && ((ino < EXT2_FIRST_INODE(fs->super)) ||
+	    (ino > fs->super->s_inodes_count))) {
+		fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
+		goto err_qctx;
+	}
+
+	block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+						    "block iterate buffer");
+	e2fsck_read_bitmaps(ctx);
+
+	/* First process orphan list */
+	while (ino) {
+		if (release_orphan_inode(ctx, &ino, block_buf))
+			goto err_buf;
+	}
+
+	/* Next process orphan file */
+	if (ext2fs_has_feature_orphan_present(fs->super) &&
+	    !ext2fs_has_feature_orphan_file(fs->super))
+		goto err_buf;
+	if (process_orphan_file(ctx, block_buf))
+		goto err_buf;
+
+	ext2fs_free_mem(&block_buf);
+	pctx.errcode = e2fsck_write_all_quotas(ctx);
+	if (pctx.errcode)
+		goto err;
+	return 0;
+err_buf:
+	ext2fs_free_mem(&block_buf);
+err_qctx:
+	if (ctx->qctx)
+		quota_release_context(&ctx->qctx);
+err:
+	return 1;
+}
+
+static int reinit_orphan_block(ext2_filsys fs,
+			       blk64_t	*block_nr,
+			       e2_blkcnt_t blockcnt,
+			       blk64_t	ref_blk EXT2FS_ATTR((unused)),
+			       int	ref_offset EXT2FS_ATTR((unused)),
+			       void *priv_data)
+{
+	struct process_orphan_block_data *pd;
+	e2fsck_t 		ctx;
+	blk64_t			blk = *block_nr;
+	struct problem_context	pctx;
+
+	pd = priv_data;
+	ctx = pd->ctx;
+
+	/* Orphan file must not have holes */
+	if (!blk) {
+		if (blockcnt == pd->blocks)
+			return BLOCK_ABORT;
+
+		clear_problem_context(&pctx);
+		pctx.ino = fs->super->s_orphan_file_inum;
+		pctx.blk = blockcnt;
+		fix_problem(ctx, PR_6_ORPHAN_FILE_HOLE, &pctx);
+return_abort:
+		pd->abort = 1;
+		return BLOCK_ABORT;
+	}
+
+	if (ext2fs_has_feature_metadata_csum(fs->super)) {
+		struct ext4_orphan_block_tail *tail;
+
+		tail = ext2fs_orphan_block_tail(fs, pd->buf);
+		/*
+		 * Update checksum to match expected buffer contents with
+		 * appropriate block number.
+		 */
+		tail->ob_checksum = ext2fs_do_orphan_file_block_csum(fs,
+				pd->ino, pd->generation, blk, pd->buf);
+	}
+	if (!pd->clear) {
+		pd->errcode = io_channel_read_blk64(fs->io, blk, 1,
+						    pd->block_buf);
+		/* Block is already cleanly initialized? */
+		if (!memcmp(pd->block_buf, pd->buf, fs->blocksize))
+			return 0;
+
+		clear_problem_context(&pctx);
+		pctx.ino = fs->super->s_orphan_file_inum;
+		pctx.blk = blockcnt;
+		if (!fix_problem(ctx, PR_6_ORPHAN_BLOCK_DIRTY, &pctx))
+			goto return_abort;
+		pd->clear = 1;
+	}
+	pd->errcode = io_channel_write_blk64(fs->io, blk, 1, pd->buf);
+	if (pd->errcode)
+		goto return_abort;
+	return 0;
+}
+
+/*
+ * Check and clear orphan file. We just return non-zero if we hit some
+ * inconsistency. Caller will truncate & recreate new orphan file.
+ */
+int check_init_orphan_file(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	char *orphan_buf;
+	struct process_orphan_block_data pd;
+	struct ext4_orphan_block_tail *tail;
+	ext2_ino_t orphan_inum = fs->super->s_orphan_file_inum;
+	struct ext2_inode orphan_inode;
+	int ret = 0;
+	errcode_t retval;
+
+	orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 5,
+						    "orphan block buffer");
+	e2fsck_read_inode(ctx, orphan_inum, &orphan_inode, "orphan inode");
+	if (EXT2_I_SIZE(&orphan_inode) & (fs->blocksize - 1)) {
+		struct problem_context	pctx;
+
+		clear_problem_context(&pctx);
+		pctx.ino = orphan_inum;
+		fix_problem(ctx, PR_6_ORPHAN_FILE_WRONG_SIZE, &pctx);
+		ret = 1;
+		goto out;
+	}
+	pd.buf = orphan_buf + 3 * fs->blocksize;
+	pd.block_buf = orphan_buf + 4 * fs->blocksize;
+	pd.blocks = EXT2_I_SIZE(&orphan_inode) / fs->blocksize;
+	pd.ctx = ctx;
+	pd.abort = 0;
+	pd.clear = 0;
+	pd.errcode = 0;
+	pd.ino = orphan_inum;
+	pd.generation = orphan_inode.i_generation;
+	/* Initialize buffer to write */
+	memset(pd.buf, 0, fs->blocksize);
+	tail = ext2fs_orphan_block_tail(fs, pd.buf);
+	tail->ob_magic = ext2fs_cpu_to_le32(EXT4_ORPHAN_BLOCK_MAGIC);
+
+	retval = ext2fs_block_iterate3(fs, orphan_inum,
+				       BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+				       orphan_buf, reinit_orphan_block, &pd);
+	if (retval) {
+		com_err("reinit_orphan_block", retval,
+			_("while calling ext2fs_block_iterate for inode %d"),
+			orphan_inum);
+		ret = 1;
+		goto out;
+	}
+	if (pd.abort) {
+		if (pd.errcode) {
+			com_err("process_orphan_block", pd.errcode,
+				_("while reading blocks of inode %d"),
+				orphan_inum);
+		}
+		ret = 1;
+	}
+
+	/* We had to clear some blocks. Report it up. */
+	if (ret == 0 && pd.clear)
+		ret = 2;
+out:
+	ext2fs_free_mem(&orphan_buf);
+	return ret;
+}
+
+/*
+ * Check the resize inode to make sure it is sane.  We check both for
+ * the case where on-line resizing is not enabled (in which case the
+ * resize inode should be cleared) as well as the case where on-line
+ * resizing is enabled.
+ */
+void check_resize_inode(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	struct ext2_inode inode;
+	struct problem_context	pctx;
+	int		i, gdt_off, ind_off;
+	dgrp_t		j;
+	blk_t		blk, pblk;
+	blk_t		expect;	/* for resize inode, which is 32-bit only */
+	__u32 		*dind_buf = 0, *ind_buf;
+	errcode_t	retval;
+
+	clear_problem_context(&pctx);
+
+	if (ext2fs_has_feature_resize_inode(fs->super) &&
+	    ext2fs_has_feature_meta_bg(fs->super) &&
+	    fix_problem(ctx, PR_0_DISABLE_RESIZE_INODE, &pctx)) {
+		ext2fs_clear_feature_resize_inode(fs->super);
+		fs->super->s_reserved_gdt_blocks = 0;
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	/*
+	 * If the resize inode feature isn't set, then
+	 * s_reserved_gdt_blocks must be zero.
+	 */
+	if (!ext2fs_has_feature_resize_inode(fs->super)) {
+		if (fs->super->s_reserved_gdt_blocks) {
+			pctx.num = fs->super->s_reserved_gdt_blocks;
+			if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
+					&pctx)) {
+				fs->super->s_reserved_gdt_blocks = 0;
+				ext2fs_mark_super_dirty(fs);
+			}
+		}
+	}
+
+	/* Read the resize inode */
+	pctx.ino = EXT2_RESIZE_INO;
+	retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
+	if (retval) {
+		if (ext2fs_has_feature_resize_inode(fs->super))
+			ctx->flags |= E2F_FLAG_RESIZE_INODE;
+		return;
+	}
+
+	/*
+	 * If the resize inode feature isn't set, check to make sure
+	 * the resize inode is cleared; then we're done.
+	 */
+	if (!ext2fs_has_feature_resize_inode(fs->super)) {
+		for (i=0; i < EXT2_N_BLOCKS; i++) {
+			if (inode.i_block[i])
+				break;
+		}
+		if ((i < EXT2_N_BLOCKS) &&
+		    fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
+			memset(&inode, 0, sizeof(inode));
+			e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
+					   "clear_resize");
+		}
+		return;
+	}
+
+	/*
+	 * The resize inode feature is enabled; check to make sure the
+	 * only block in use is the double indirect block
+	 */
+	blk = inode.i_block[EXT2_DIND_BLOCK];
+	for (i=0; i < EXT2_N_BLOCKS; i++) {
+		if (i != EXT2_DIND_BLOCK && inode.i_block[i])
+			break;
+	}
+	if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
+	    !(inode.i_mode & LINUX_S_IFREG) ||
+	    (blk < fs->super->s_first_data_block ||
+	     blk >= ext2fs_blocks_count(fs->super))) {
+	resize_inode_invalid:
+		if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
+			memset(&inode, 0, sizeof(inode));
+			e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
+					   "clear_resize");
+			ctx->flags |= E2F_FLAG_RESIZE_INODE;
+		}
+		if (!(ctx->options & E2F_OPT_READONLY)) {
+			fs->super->s_state &= ~EXT2_VALID_FS;
+			ext2fs_mark_super_dirty(fs);
+		}
+		goto cleanup;
+	}
+	dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
+						    "resize dind buffer");
+	ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
+
+	retval = ext2fs_read_ind_block(fs, blk, dind_buf);
+	if (retval)
+		goto resize_inode_invalid;
+
+	gdt_off = fs->desc_blocks;
+	pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
+	if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
+		pblk++;	/* Deal with 1024 blocksize bigalloc fs */
+	for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
+	     i++, gdt_off++, pblk++) {
+		gdt_off %= fs->blocksize/4;
+		if (dind_buf[gdt_off] != pblk)
+			goto resize_inode_invalid;
+		retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
+		if (retval)
+			goto resize_inode_invalid;
+		ind_off = 0;
+		for (j = 1; j < fs->group_desc_count; j++) {
+			if (!ext2fs_bg_has_super(fs, j))
+				continue;
+			expect = pblk + EXT2_GROUPS_TO_BLOCKS(fs->super, j);
+			if (ind_buf[ind_off] != expect)
+				goto resize_inode_invalid;
+			ind_off++;
+		}
+	}
+
+cleanup:
+	if (dind_buf)
+		ext2fs_free_mem(&dind_buf);
+
+ }
+
+/*
+ * This function checks the dirhash signed/unsigned hint if necessary.
+ */
+static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
+{
+	struct ext2_super_block *sb = ctx->fs->super;
+	struct problem_context pctx;
+	char	c;
+
+	if ((ctx->options & E2F_OPT_READONLY) ||
+	    !ext2fs_has_feature_dir_index(sb) ||
+	    (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
+		return;
+
+	c = (char) 255;
+
+	clear_problem_context(&pctx);
+	if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
+		if (((int) c) == -1) {
+			sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
+		} else {
+			sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
+		}
+		ext2fs_mark_super_dirty(ctx->fs);
+	}
+}
+
+
+void check_super_block(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	blk64_t	first_block, last_block;
+	struct ext2_super_block *sb = fs->super;
+	unsigned int	ipg_max;
+	problem_t	problem;
+	blk64_t	blocks_per_group = fs->super->s_blocks_per_group;
+	__u32	bpg_max, cpg_max;
+	__u64	blks_max;
+	int	inodes_per_block;
+	int	inode_size;
+	int	accept_time_fudge;
+	int	broken_system_clock;
+	dgrp_t	i;
+	blk64_t	should_be;
+	struct problem_context	pctx;
+	blk64_t	free_blocks = 0;
+	ext2_ino_t free_inodes = 0;
+	int     csum_flag, clear_test_fs_flag;
+
+	inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
+	ipg_max = inodes_per_block * (blocks_per_group - 4);
+	if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
+		ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
+	cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
+	if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
+		cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
+	bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
+	if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
+		bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
+
+	ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
+		 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
+	ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
+		 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
+	ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
+		sizeof(int) * fs->group_desc_count, "invalid_inode_table");
+
+	blks_max = (1ULL << 32) * EXT2_MAX_BLOCKS_PER_GROUP(fs->super);
+	if (ext2fs_has_feature_64bit(fs->super)) {
+		if (blks_max > ((1ULL << 48) - 1))
+			blks_max = (1ULL << 48) - 1;
+	} else {
+		if (blks_max > ((1ULL << 32) - 1))
+			blks_max = (1ULL << 32) - 1;
+	}
+
+	clear_problem_context(&pctx);
+
+	/*
+	 * Verify the super block constants...
+	 */
+	if (!check_super_value(ctx, "inodes_count", sb->s_inodes_count,
+			       MIN_CHECK, 1, 0))
+		return;
+	if (!check_super_value64(ctx, "blocks_count", ext2fs_blocks_count(sb),
+				 MIN_CHECK | MAX_CHECK, 1, blks_max))
+		return;
+	if (!check_super_value(ctx, "first_data_block", sb->s_first_data_block,
+			       MAX_CHECK, 0, ext2fs_blocks_count(sb)))
+		return;
+	if (!check_super_value(ctx, "log_block_size", sb->s_log_block_size,
+			       MIN_CHECK | MAX_CHECK, 0,
+			       EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE))
+		return;
+	if (!check_super_value(ctx, "log_cluster_size",
+			       sb->s_log_cluster_size,
+			       MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
+			       (EXT2_MAX_CLUSTER_LOG_SIZE -
+			        EXT2_MIN_CLUSTER_LOG_SIZE)))
+		return;
+	if (!check_super_value(ctx, "clusters_per_group",
+			       sb->s_clusters_per_group,
+			       MIN_CHECK | MAX_CHECK, 8, cpg_max))
+		return;
+	if (!check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
+			       MIN_CHECK | MAX_CHECK, 8, bpg_max))
+		return;
+	if (!check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
+			       MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max))
+		return;
+	if (!check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
+			       MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2))
+		return;
+	if (!check_super_value(ctx, "reserved_gdt_blocks",
+			       sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
+			       fs->blocksize / sizeof(__u32)))
+		return;
+	if (!check_super_value(ctx, "desc_size",
+			       sb->s_desc_size, MAX_CHECK | LOG2_CHECK, 0,
+			       EXT2_MAX_DESC_SIZE))
+		return;
+
+	should_be = (__u64)sb->s_inodes_per_group * fs->group_desc_count;
+	if (should_be > ~0U) {
+		pctx.num = should_be;
+		fix_problem(ctx, PR_0_INODE_COUNT_BIG, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return;
+	}
+	if (sb->s_inodes_count != should_be) {
+		pctx.ino = sb->s_inodes_count;
+		pctx.ino2 = should_be;
+		if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
+			sb->s_inodes_count = should_be;
+			ext2fs_mark_super_dirty(fs);
+		} else {
+			pctx.num = sb->s_inodes_count;
+			pctx.str = "inodes_count";
+			fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+			ctx->flags |= E2F_FLAG_ABORT;
+			return;
+		}
+	}
+	if (sb->s_rev_level > EXT2_GOOD_OLD_REV &&
+	    !check_super_value(ctx, "first_ino", sb->s_first_ino,
+			       MIN_CHECK | MAX_CHECK,
+			       EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count))
+		return;
+	inode_size = EXT2_INODE_SIZE(sb);
+	if (!check_super_value(ctx, "inode_size",
+			       inode_size, MIN_CHECK | MAX_CHECK | LOG2_CHECK,
+			       EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize))
+		return;
+	if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
+				       EXT2FS_CLUSTER_RATIO(fs))) {
+		pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
+		pctx.str = "block_size";
+		fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return;
+	}
+
+	if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
+	    (ctx->num_blocks < ext2fs_blocks_count(sb))) {
+		pctx.blk = ext2fs_blocks_count(sb);
+		pctx.blk2 = ctx->num_blocks;
+		if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
+			ctx->flags |= E2F_FLAG_ABORT;
+			return;
+		}
+	}
+
+	should_be = (sb->s_log_block_size == 0 &&
+		     EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
+	if (sb->s_first_data_block != should_be) {
+		pctx.blk = sb->s_first_data_block;
+		pctx.blk2 = should_be;
+		fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return;
+	}
+
+	if (EXT2_INODE_SIZE(sb) > EXT2_GOOD_OLD_INODE_SIZE) {
+		unsigned min =
+			sizeof(((struct ext2_inode_large *) 0)->i_extra_isize) +
+			sizeof(((struct ext2_inode_large *) 0)->i_checksum_hi);
+		unsigned max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
+		pctx.num = sb->s_min_extra_isize;
+		if (sb->s_min_extra_isize &&
+		    (sb->s_min_extra_isize < min ||
+		     sb->s_min_extra_isize > max ||
+		     sb->s_min_extra_isize & 3) &&
+		    fix_problem(ctx, PR_0_BAD_MIN_EXTRA_ISIZE, &pctx)) {
+			sb->s_min_extra_isize =
+				(sizeof(struct ext2_inode_large) -
+				 EXT2_GOOD_OLD_INODE_SIZE);
+			ext2fs_mark_super_dirty(fs);
+		}
+		pctx.num = sb->s_want_extra_isize;
+		if (sb->s_want_extra_isize &&
+		    (sb->s_want_extra_isize < min ||
+		     sb->s_want_extra_isize > max ||
+		     sb->s_want_extra_isize & 3) &&
+		    fix_problem(ctx, PR_0_BAD_WANT_EXTRA_ISIZE, &pctx)) {
+			sb->s_want_extra_isize =
+				(sizeof(struct ext2_inode_large) -
+				 EXT2_GOOD_OLD_INODE_SIZE);
+			ext2fs_mark_super_dirty(fs);
+		}
+	}
+		    
+	/* Are metadata_csum and uninit_bg both set? */
+	if (ext2fs_has_feature_metadata_csum(fs->super) &&
+	    ext2fs_has_feature_gdt_csum(fs->super) &&
+	    fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
+		ext2fs_clear_feature_gdt_csum(fs->super);
+		ext2fs_mark_super_dirty(fs);
+		for (i = 0; i < fs->group_desc_count; i++)
+			ext2fs_group_desc_csum_set(fs, i);
+	}
+
+	/* We can't have ^metadata_csum,metadata_csum_seed */
+	if (!ext2fs_has_feature_metadata_csum(fs->super) &&
+	    ext2fs_has_feature_csum_seed(fs->super) &&
+	    fix_problem(ctx, PR_0_CSUM_SEED_WITHOUT_META_CSUM, &pctx)) {
+		ext2fs_clear_feature_csum_seed(fs->super);
+		fs->super->s_checksum_seed = 0;
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	/* Is 64bit set and extents unset? */
+	if (ext2fs_has_feature_64bit(fs->super) &&
+	    !ext2fs_has_feature_extents(fs->super) &&
+	    fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
+		ext2fs_set_feature_extents(fs->super);
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	/* Did user ask us to convert files to extents? */
+	if (ctx->options & E2F_OPT_CONVERT_BMAP) {
+		ext2fs_set_feature_extents(fs->super);
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	if (ext2fs_has_feature_meta_bg(fs->super) &&
+	    (fs->super->s_first_meta_bg > fs->desc_blocks)) {
+		pctx.group = fs->desc_blocks;
+		pctx.num = fs->super->s_first_meta_bg;
+		if (fix_problem(ctx, PR_0_FIRST_META_BG_TOO_BIG, &pctx)) {
+			ext2fs_clear_feature_meta_bg(fs->super);
+			fs->super->s_first_meta_bg = 0;
+			ext2fs_mark_super_dirty(fs);
+		}
+	}
+
+	/*
+	 * Verify the group descriptors....
+	 */
+	first_block = sb->s_first_data_block;
+	last_block = ext2fs_blocks_count(sb)-1;
+
+	csum_flag = ext2fs_has_group_desc_csum(fs);
+	for (i = 0; i < fs->group_desc_count; i++) {
+		pctx.group = i;
+
+		if (!ext2fs_has_feature_flex_bg(fs->super)) {
+			first_block = ext2fs_group_first_block2(fs, i);
+			last_block = ext2fs_group_last_block2(fs, i);
+		}
+
+		if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
+		    (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
+			pctx.blk = ext2fs_block_bitmap_loc(fs, i);
+			if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
+				ext2fs_block_bitmap_loc_set(fs, i, 0);
+		}
+		if (ext2fs_block_bitmap_loc(fs, i) == 0) {
+			ctx->invalid_block_bitmap_flag[i]++;
+			ctx->invalid_bitmaps++;
+		}
+		if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
+		    (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
+			pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
+			if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
+				ext2fs_inode_bitmap_loc_set(fs, i, 0);
+		}
+		if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
+			ctx->invalid_inode_bitmap_flag[i]++;
+			ctx->invalid_bitmaps++;
+		}
+		if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
+		    ((ext2fs_inode_table_loc(fs, i) +
+		      fs->inode_blocks_per_group - 1) > last_block)) {
+			pctx.blk = ext2fs_inode_table_loc(fs, i);
+			if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
+				ext2fs_inode_table_loc_set(fs, i, 0);
+		}
+		if (ext2fs_inode_table_loc(fs, i) == 0) {
+			ctx->invalid_inode_table_flag[i]++;
+			ctx->invalid_bitmaps++;
+		}
+		free_blocks += ext2fs_bg_free_blocks_count(fs, i);
+		free_inodes += ext2fs_bg_free_inodes_count(fs, i);
+
+		if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
+		    (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
+		    (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
+			ext2fs_unmark_valid(fs);
+
+		should_be = 0;
+		if (!ext2fs_group_desc_csum_verify(fs, i)) {
+			pctx.csum1 = ext2fs_bg_checksum(fs, i);
+			pctx.csum2 = ext2fs_group_desc_csum(fs, i);
+			if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
+				ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
+				ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
+				ext2fs_bg_itable_unused_set(fs, i, 0);
+				should_be = 1;
+			}
+			ext2fs_unmark_valid(fs);
+		}
+
+		if (!csum_flag &&
+		    (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
+		     ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
+		     ext2fs_bg_itable_unused(fs, i) != 0)) {
+			if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
+				ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
+				ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
+				ext2fs_bg_itable_unused_set(fs, i, 0);
+				should_be = 1;
+			}
+			ext2fs_unmark_valid(fs);
+		}
+
+		if (i == fs->group_desc_count - 1 &&
+		    ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
+			if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
+				ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
+				should_be = 1;
+			}
+			ext2fs_unmark_valid(fs);
+		}
+
+		if (csum_flag &&
+		    (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
+		     ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
+			pctx.blk = ext2fs_bg_itable_unused(fs, i);
+			if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
+				ext2fs_bg_itable_unused_set(fs, i, 0);
+				should_be = 1;
+			}
+			ext2fs_unmark_valid(fs);
+		}
+
+		if (should_be)
+			ext2fs_group_desc_csum_set(fs, i);
+		/* If the user aborts e2fsck by typing ^C, stop right away */
+		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+			return;
+	}
+
+	ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
+	ctx->free_inodes = free_inodes;
+
+	if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
+	    (sb->s_free_inodes_count > sb->s_inodes_count))
+		ext2fs_unmark_valid(fs);
+
+
+	/*
+	 * If we have invalid bitmaps, set the error state of the
+	 * filesystem.
+	 */
+	if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
+		sb->s_state &= ~EXT2_VALID_FS;
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	clear_problem_context(&pctx);
+
+#ifndef EXT2_SKIP_UUID
+	/*
+	 * If the UUID field isn't assigned, assign it.
+	 * Skip if checksums are enabled and the filesystem is mounted,
+	 * if the id changes under the kernel remounting rw may fail.
+	 */
+	if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
+	    !ext2fs_has_feature_metadata_csum(ctx->fs->super) &&
+	    (!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
+		if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
+			uuid_generate(sb->s_uuid);
+			ext2fs_init_csum_seed(fs);
+			fs->flags |= EXT2_FLAG_DIRTY;
+			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+		}
+	}
+#endif
+
+	/*
+	 * Check to see if we should disable the test_fs flag
+	 */
+	profile_get_boolean(ctx->profile, "options",
+			    "clear_test_fs_flag", 0, 1,
+			    &clear_test_fs_flag);
+	if (!(ctx->options & E2F_OPT_READONLY) &&
+	    clear_test_fs_flag &&
+	    (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
+	    (fs_proc_check("ext4") || check_for_modules("ext4"))) {
+		if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
+			fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
+			fs->flags |= EXT2_FLAG_DIRTY;
+			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+		}
+	}
+			
+	/*
+	 * For the Hurd, check to see if the filetype option is set,
+	 * since it doesn't support it.
+	 */
+	if (!(ctx->options & E2F_OPT_READONLY) &&
+	    fs->super->s_creator_os == EXT2_OS_HURD &&
+	    ext2fs_has_feature_filetype(fs->super)) {
+		if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
+			ext2fs_clear_feature_filetype(fs->super);
+			ext2fs_mark_super_dirty(fs);
+			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+		}
+	}
+
+	/*
+	 * If we have any of the compatibility flags set, we need to have a
+	 * revision 1 filesystem.  Most kernels will not check the flags on
+	 * a rev 0 filesystem and we may have corruption issues because of
+	 * the incompatible changes to the filesystem.
+	 */
+	if (!(ctx->options & E2F_OPT_READONLY) &&
+	    fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
+	    (fs->super->s_feature_compat ||
+	     fs->super->s_feature_ro_compat ||
+	     fs->super->s_feature_incompat) &&
+	    fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
+		ext2fs_update_dynamic_rev(fs);
+		ext2fs_mark_super_dirty(fs);
+		fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+	}
+
+	/*
+	 * Clean up any orphan inodes, if present.
+	 */
+	if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
+		fs->super->s_state &= ~EXT2_VALID_FS;
+		ext2fs_mark_super_dirty(fs);
+	}
+
+	/*
+	 * Unfortunately, due to Windows' unfortunate design decision
+	 * to configure the hardware clock to tick localtime, instead
+	 * of the more proper and less error-prone UTC time, many
+	 * users end up in the situation where the system clock is
+	 * incorrectly set at the time when e2fsck is run.
+	 *
+	 * Historically this was usually due to some distributions
+	 * having buggy init scripts and/or installers that didn't
+	 * correctly detect this case and take appropriate
+	 * countermeasures.  However, it's still possible, despite the
+	 * best efforts of init script and installer authors to not be
+	 * able to detect this misconfiguration, usually due to a
+	 * buggy or misconfigured virtualization manager or the
+	 * installer not having access to a network time server during
+	 * the installation process.  So by default, we allow the
+	 * superblock times to be fudged by up to 24 hours.  This can
+	 * be disabled by setting options.accept_time_fudge to the
+	 * boolean value of false in e2fsck.conf.  We also support
+	 * options.buggy_init_scripts for backwards compatibility.
+	 */
+	profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
+			    0, 1, &accept_time_fudge);
+	profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
+			    0, accept_time_fudge, &accept_time_fudge);
+	ctx->time_fudge = accept_time_fudge ? 86400 : 0;
+
+	profile_get_boolean(ctx->profile, "options", "broken_system_clock",
+			    0, 0, &broken_system_clock);
+
+	/*
+	 * Check to see if the superblock last mount time or last
+	 * write time is in the future.
+	 */
+	if (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
+	    !broken_system_clock && !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
+	    (fs->super->s_mtime > (__u32) ctx->now)) {
+		pctx.num = fs->super->s_mtime;
+		problem = PR_0_FUTURE_SB_LAST_MOUNT;
+		if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
+			problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
+		if (fix_problem(ctx, problem, &pctx)) {
+			fs->super->s_mtime = ctx->now;
+			fs->flags |= EXT2_FLAG_DIRTY;
+		}
+	}
+	if (((ctx->options & E2F_OPT_FORCE) || fs->super->s_checkinterval) &&
+	    !broken_system_clock && !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
+	    (fs->super->s_wtime > (__u32) ctx->now)) {
+		pctx.num = fs->super->s_wtime;
+		problem = PR_0_FUTURE_SB_LAST_WRITE;
+		if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
+			problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
+		if (fix_problem(ctx, problem, &pctx)) {
+			fs->super->s_wtime = ctx->now;
+			fs->flags |= EXT2_FLAG_DIRTY;
+		}
+	}
+
+	e2fsck_validate_quota_inodes(ctx);
+
+	/*
+	 * Move the ext3 journal file, if necessary.
+	 */
+	e2fsck_move_ext3_journal(ctx);
+
+	/*
+	 * Fix journal hint, if necessary
+	 */
+	e2fsck_fix_ext3_journal_hint(ctx);
+
+	/*
+	 * Add dirhash hint if necessary
+	 */
+	e2fsck_fix_dirhash_hint(ctx);
+
+	/*
+	 * Hide quota inodes if necessary.
+	 */
+	e2fsck_hide_quota(ctx);
+
+	return;
+}
+
+/*
+ * Check to see if we should backup the master sb to the backup super
+ * blocks.  Returns non-zero if the sb should be backed up.
+ */
+
+/*
+ * A few flags are set on the fly by the kernel, but only in the
+ * primary superblock.  This is actually a bad thing, and we should
+ * try to discourage it in the future.  In particular, for the newer
+ * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
+ * EXT3_FEATURE_INCOMPAT_EXTENTS.  So some of these may go away in the
+ * future.  EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
+ * copying the primary superblock during online resize.
+ *
+ * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
+ * unfortunately, we shouldn't ignore it since if it's not set in the
+ * backup, the extended attributes in the filesystem will be stripped
+ * away.
+ */
+#define FEATURE_RO_COMPAT_IGNORE	(EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
+					 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
+#define FEATURE_INCOMPAT_IGNORE		(EXT3_FEATURE_INCOMPAT_EXTENTS| \
+					 EXT3_FEATURE_INCOMPAT_RECOVER)
+
+int check_backup_super_block(e2fsck_t ctx)
+{
+	ext2_filsys	fs = ctx->fs;
+	errcode_t	retval;
+	dgrp_t		g;
+	blk64_t		sb;
+	int		ret = 0;
+	char		buf[SUPERBLOCK_SIZE];
+	struct ext2_super_block	*backup_sb;
+
+	/*
+	 * If we are already writing out the backup blocks, then we
+	 * don't need to test.  Also, if the filesystem is invalid, or
+	 * the check was aborted or cancelled, we also don't want to
+	 * do the backup.  If the filesystem was opened read-only then
+	 * we can't do the backup.
+	 */
+	if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
+	    !ext2fs_test_valid(fs) ||
+	    (fs->super->s_state & EXT2_ERROR_FS) ||
+	    (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
+	    (ctx->options & E2F_OPT_READONLY))
+		return 0;
+
+	for (g = 1; g < fs->group_desc_count; g++) {
+		if (!ext2fs_bg_has_super(fs, g))
+			continue;
+
+		sb = ext2fs_group_first_block2(fs, g);
+
+		retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
+					     buf);
+		if (retval)
+			continue;
+		backup_sb = (struct ext2_super_block *) buf;
+#ifdef WORDS_BIGENDIAN
+		ext2fs_swap_super(backup_sb);
+#endif
+		if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
+		    (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
+		    ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
+		     EXT2_MAX_BLOCK_LOG_SIZE) ||
+		    (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
+			continue;
+
+#define SUPER_INCOMPAT_DIFFERENT(x)	\
+	((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) !=	\
+	 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
+#define SUPER_RO_COMPAT_DIFFERENT(x)	\
+	((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) !=	\
+	 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
+#define SUPER_DIFFERENT(x)		\
+	(fs->super->x != backup_sb->x)
+
+		if (SUPER_DIFFERENT(s_feature_compat) ||
+		    SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
+		    SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
+		    SUPER_DIFFERENT(s_blocks_count) ||
+		    SUPER_DIFFERENT(s_blocks_count_hi) ||
+		    SUPER_DIFFERENT(s_inodes_count) ||
+		    memcmp(fs->super->s_uuid, backup_sb->s_uuid,
+			   sizeof(fs->super->s_uuid)))
+			ret = 1;
+		break;
+	}
+	return ret;
+}