1 files changed, 840 insertions, 0 deletions

diff --git a/e2fsprogs/e2fsck/rehash.c b/e2fsprogs/e2fsck/rehash.c
new file mode 100644
index 000000000..727e08c2b
--- /dev/null
+++ b/e2fsprogs/e2fsck/rehash.c
@@ -0,0 +1,840 @@
+/*
+ * rehash.c --- rebuild hash tree directories
+ * 
+ * Copyright (C) 2002 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ * 
+ * This algorithm is designed for simplicity of implementation and to
+ * pack the directory as much as possible.  It however requires twice
+ * as much memory as the size of the directory.  The maximum size
+ * directory supported using a 4k blocksize is roughly a gigabyte, and
+ * so there may very well be problems with machines that don't have
+ * virtual memory, and obscenely large directories.
+ *
+ * An alternate algorithm which is much more disk intensive could be
+ * written, and probably will need to be written in the future.  The
+ * design goals of such an algorithm are: (a) use (roughly) constant
+ * amounts of memory, no matter how large the directory, (b) the
+ * directory must be safe at all times, even if e2fsck is interrupted
+ * in the middle, (c) we must use minimal amounts of extra disk
+ * blocks.  This pretty much requires an incremental approach, where
+ * we are reading from one part of the directory, and inserting into
+ * the front half.  So the algorithm will have to keep track of a
+ * moving block boundary between the new tree and the old tree, and
+ * files will need to be moved from the old directory and inserted
+ * into the new tree.  If the new directory requires space which isn't
+ * yet available, blocks from the beginning part of the old directory
+ * may need to be moved to the end of the directory to make room for
+ * the new tree:
+ *
+ *    --------------------------------------------------------
+ *    |  new tree   |        | old tree                      |
+ *    --------------------------------------------------------
+ *                  ^ ptr    ^ptr
+ *                tail new   head old
+ * 
+ * This is going to be a pain in the tuckus to implement, and will
+ * require a lot more disk accesses.  So I'm going to skip it for now;
+ * it's only really going to be an issue for really, really big
+ * filesystems (when we reach the level of tens of millions of files
+ * in a single directory).  It will probably be easier to simply
+ * require that e2fsck use VM first.
+ */
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include "e2fsck.h"
+#include "problem.h"
+
+struct fill_dir_struct {
+	char *buf;
+	struct ext2_inode *inode;
+	int err;
+	e2fsck_t ctx;
+	struct hash_entry *harray;
+	int max_array, num_array;
+	int dir_size;
+	int compress;
+	ino_t parent;
+};
+
+struct hash_entry {
+	ext2_dirhash_t	hash;
+	ext2_dirhash_t	minor_hash;
+	struct ext2_dir_entry	*dir;
+};
+
+struct out_dir {
+	int		num;
+	int		max;
+	char		*buf;
+	ext2_dirhash_t	*hashes;
+};
+
+static int fill_dir_block(ext2_filsys fs,
+			  blk_t	*block_nr,
+			  e2_blkcnt_t blockcnt,
+			  blk_t ref_block EXT2FS_ATTR((unused)),
+			  int ref_offset EXT2FS_ATTR((unused)),
+			  void *priv_data)
+{
+	struct fill_dir_struct	*fd = (struct fill_dir_struct *) priv_data;
+	struct hash_entry 	*new_array, *ent;
+	struct ext2_dir_entry 	*dirent;
+	char			*dir;
+	unsigned int		offset, dir_offset;
+	
+	if (blockcnt < 0)
+		return 0;
+
+	offset = blockcnt * fs->blocksize;
+	if (offset + fs->blocksize > fd->inode->i_size) {
+		fd->err = EXT2_ET_DIR_CORRUPTED;
+		return BLOCK_ABORT;
+	}
+	dir = (fd->buf+offset);
+	if (HOLE_BLKADDR(*block_nr)) {
+		memset(dir, 0, fs->blocksize);
+		dirent = (struct ext2_dir_entry *) dir;
+		dirent->rec_len = fs->blocksize;
+	} else {
+		fd->err = ext2fs_read_dir_block(fs, *block_nr, dir);
+		if (fd->err)
+			return BLOCK_ABORT;
+	}
+	/* While the directory block is "hot", index it. */
+	dir_offset = 0;
+	while (dir_offset < fs->blocksize) {
+		dirent = (struct ext2_dir_entry *) (dir + dir_offset);
+		if (((dir_offset + dirent->rec_len) > fs->blocksize) ||
+		    (dirent->rec_len < 8) ||
+		    ((dirent->rec_len % 4) != 0) ||
+		    (((dirent->name_len & 0xFF)+8) > dirent->rec_len)) {
+			fd->err = EXT2_ET_DIR_CORRUPTED;
+			return BLOCK_ABORT;
+		}
+		dir_offset += dirent->rec_len;
+		if (dirent->inode == 0)
+			continue;
+		if (!fd->compress && ((dirent->name_len&0xFF) == 1) &&
+		    (dirent->name[0] == '.'))
+			continue;
+		if (!fd->compress && ((dirent->name_len&0xFF) == 2) &&
+		    (dirent->name[0] == '.') && (dirent->name[1] == '.')) {
+			fd->parent = dirent->inode;
+			continue;
+		}
+		if (fd->num_array >= fd->max_array) {
+			new_array = realloc(fd->harray,
+			    sizeof(struct hash_entry) * (fd->max_array+500));
+			if (!new_array) {
+				fd->err = ENOMEM;
+				return BLOCK_ABORT;
+			}
+			fd->harray = new_array;
+			fd->max_array += 500;
+		}
+		ent = fd->harray + fd->num_array++;
+		ent->dir = dirent;
+		fd->dir_size += EXT2_DIR_REC_LEN(dirent->name_len & 0xFF);
+		if (fd->compress)
+			ent->hash = ent->minor_hash = 0;
+		else {
+			fd->err = ext2fs_dirhash(fs->super->s_def_hash_version,
+						 dirent->name,
+						 dirent->name_len & 0xFF,
+						 fs->super->s_hash_seed,
+						 &ent->hash, &ent->minor_hash);
+			if (fd->err)
+				return BLOCK_ABORT;
+		}
+	}
+	
+	return 0;
+}
+
+/* Used for sorting the hash entry */
+static EXT2_QSORT_TYPE name_cmp(const void *a, const void *b)
+{
+	const struct hash_entry *he_a = (const struct hash_entry *) a;
+	const struct hash_entry *he_b = (const struct hash_entry *) b;
+	int	ret;
+	int	min_len;
+
+	min_len = he_a->dir->name_len;
+	if (min_len > he_b->dir->name_len)
+		min_len = he_b->dir->name_len;
+
+	ret = strncmp(he_a->dir->name, he_b->dir->name, min_len);
+	if (ret == 0) {
+		if (he_a->dir->name_len > he_b->dir->name_len)
+			ret = 1;
+		else if (he_a->dir->name_len < he_b->dir->name_len)
+			ret = -1;
+		else
+			ret = he_b->dir->inode - he_a->dir->inode;
+	}
+	return ret;
+}
+
+/* Used for sorting the hash entry */
+static EXT2_QSORT_TYPE hash_cmp(const void *a, const void *b)
+{
+	const struct hash_entry *he_a = (const struct hash_entry *) a;
+	const struct hash_entry *he_b = (const struct hash_entry *) b;
+	int	ret;
+	
+	if (he_a->hash > he_b->hash)
+		ret = 1;
+	else if (he_a->hash < he_b->hash)
+		ret = -1;
+	else {
+		if (he_a->minor_hash > he_b->minor_hash)
+			ret = 1;
+		else if (he_a->minor_hash < he_b->minor_hash)
+			ret = -1;
+		else
+			ret = name_cmp(a, b);
+	}
+	return ret;
+}
+
+static errcode_t alloc_size_dir(ext2_filsys fs, struct out_dir *outdir, 
+				int blocks)
+{
+	void			*new_mem;
+
+	if (outdir->max) {
+		new_mem = realloc(outdir->buf, blocks * fs->blocksize);
+		if (!new_mem)
+			return ENOMEM;
+		outdir->buf = new_mem;
+		new_mem = realloc(outdir->hashes,
+				  blocks * sizeof(ext2_dirhash_t));
+		if (!new_mem)
+			return ENOMEM;
+		outdir->hashes = new_mem;
+	} else {
+		outdir->buf = malloc(blocks * fs->blocksize);
+		outdir->hashes = malloc(blocks * sizeof(ext2_dirhash_t));
+		outdir->num = 0;
+	}
+	outdir->max = blocks;
+	return 0;
+}
+
+static void free_out_dir(struct out_dir *outdir)
+{
+	if (outdir->buf)
+		free(outdir->buf);
+	if (outdir->hashes)
+		free(outdir->hashes);
+	outdir->max = 0;
+	outdir->num =0;
+}
+
+static errcode_t get_next_block(ext2_filsys fs, struct out_dir *outdir,
+			 char ** ret)
+{
+	errcode_t	retval;
+
+	if (outdir->num >= outdir->max) {
+		retval = alloc_size_dir(fs, outdir, outdir->max + 50);
+		if (retval)
+			return retval;
+	}
+	*ret = outdir->buf + (outdir->num++ * fs->blocksize);
+	memset(*ret, 0, fs->blocksize);
+	return 0;
+}
+
+/*
+ * This function is used to make a unique filename.  We do this by
+ * appending ~0, and then incrementing the number.  However, we cannot
+ * expand the length of the filename beyond the padding available in
+ * the directory entry.
+ */
+static void mutate_name(char *str, __u16 *len)
+{
+	int	i;
+	__u16	l = *len & 0xFF, h = *len & 0xff00;
+	
+	/*
+	 * First check to see if it looks the name has been mutated
+	 * already
+	 */
+	for (i = l-1; i > 0; i--) {
+		if (!isdigit(str[i]))
+			break;
+	}
+	if ((i == l-1) || (str[i] != '~')) {
+		if (((l-1) & 3) < 2)
+			l += 2;
+		else
+			l = (l+3) & ~3;
+		str[l-2] = '~';
+		str[l-1] = '0';
+		*len = l | h;
+		return;
+	}
+	for (i = l-1; i >= 0; i--) {
+		if (isdigit(str[i])) {
+			if (str[i] == '9')
+				str[i] = '0';
+			else {
+				str[i]++;
+				return;
+			}
+			continue;
+		}
+		if (i == 1) {
+			if (str[0] == 'z')
+				str[0] = 'A';
+			else if (str[0] == 'Z') {
+				str[0] = '~';
+				str[1] = '0';
+			} else
+				str[0]++;
+		} else if (i > 0) {
+			str[i] = '1';
+			str[i-1] = '~';
+		} else {
+			if (str[0] == '~')
+				str[0] = 'a';
+			else 
+				str[0]++;
+		}
+		break;
+	}
+}
+
+static int duplicate_search_and_fix(e2fsck_t ctx, ext2_filsys fs,
+				    ext2_ino_t ino,
+				    struct fill_dir_struct *fd)
+{
+	struct problem_context	pctx;
+	struct hash_entry 	*ent, *prev;
+	int			i, j;
+	int			fixed = 0;
+	char			new_name[256];
+	__u16			new_len;
+	
+	clear_problem_context(&pctx);
+	pctx.ino = ino;
+
+	for (i=1; i < fd->num_array; i++) {
+		ent = fd->harray + i;
+		prev = ent - 1;
+		if (!ent->dir->inode ||
+		    ((ent->dir->name_len & 0xFF) !=
+		     (prev->dir->name_len & 0xFF)) ||
+		    (strncmp(ent->dir->name, prev->dir->name,
+			     ent->dir->name_len & 0xFF)))
+			continue;
+		pctx.dirent = ent->dir;
+		if ((ent->dir->inode == prev->dir->inode) &&
+		    fix_problem(ctx, PR_2_DUPLICATE_DIRENT, &pctx)) {
+			e2fsck_adjust_inode_count(ctx, ent->dir->inode, -1);
+			ent->dir->inode = 0;
+			fixed++;
+			continue;
+		}
+		memcpy(new_name, ent->dir->name, ent->dir->name_len & 0xFF);
+		new_len = ent->dir->name_len;
+		mutate_name(new_name, &new_len);
+		for (j=0; j < fd->num_array; j++) {
+			if ((i==j) ||
+			    ((ent->dir->name_len & 0xFF) !=
+			     (fd->harray[j].dir->name_len & 0xFF)) ||
+			    (strncmp(new_name, fd->harray[j].dir->name,
+				     new_len & 0xFF)))
+				continue;
+			mutate_name(new_name, &new_len);
+			
+			j = -1;
+		}
+		new_name[new_len & 0xFF] = 0;
+		pctx.str = new_name;
+		if (fix_problem(ctx, PR_2_NON_UNIQUE_FILE, &pctx)) {
+			memcpy(ent->dir->name, new_name, new_len & 0xFF);
+			ent->dir->name_len = new_len;
+			ext2fs_dirhash(fs->super->s_def_hash_version,
+				       ent->dir->name,
+				       ent->dir->name_len & 0xFF,
+				       fs->super->s_hash_seed,
+				       &ent->hash, &ent->minor_hash);
+			fixed++;
+		}
+	}
+	return fixed;
+}
+
+
+static errcode_t copy_dir_entries(ext2_filsys fs,
+				  struct fill_dir_struct *fd,
+				  struct out_dir *outdir)
+{
+	errcode_t		retval;
+	char			*block_start;
+	struct hash_entry 	*ent;
+	struct ext2_dir_entry	*dirent;
+	int			i, rec_len, left;
+	ext2_dirhash_t		prev_hash;
+	int			offset;
+	
+	outdir->max = 0;
+	retval = alloc_size_dir(fs, outdir,
+				(fd->dir_size / fs->blocksize) + 2);
+	if (retval)
+		return retval;
+	outdir->num = fd->compress ? 0 : 1;
+	offset = 0;
+	outdir->hashes[0] = 0;
+	prev_hash = 1;
+	if ((retval = get_next_block(fs, outdir, &block_start)))
+		return retval;
+	dirent = (struct ext2_dir_entry *) block_start;
+	left = fs->blocksize;
+	for (i=0; i < fd->num_array; i++) {
+		ent = fd->harray + i;
+		if (ent->dir->inode == 0)
+			continue;
+		rec_len = EXT2_DIR_REC_LEN(ent->dir->name_len & 0xFF);
+		if (rec_len > left) {
+			if (left)
+				dirent->rec_len += left;
+			if ((retval = get_next_block(fs, outdir,
+						      &block_start)))
+				return retval;
+			offset = 0;
+		}
+		left = fs->blocksize - offset;
+		dirent = (struct ext2_dir_entry *) (block_start + offset);
+		if (offset == 0) {
+			if (ent->hash == prev_hash)
+				outdir->hashes[outdir->num-1] = ent->hash | 1;
+			else
+				outdir->hashes[outdir->num-1] = ent->hash;
+		}
+		dirent->inode = ent->dir->inode;
+		dirent->name_len = ent->dir->name_len;
+		dirent->rec_len = rec_len;
+		memcpy(dirent->name, ent->dir->name, dirent->name_len & 0xFF);
+		offset += rec_len;
+		left -= rec_len;
+		if (left < 12) {
+			dirent->rec_len += left;
+			offset += left;
+			left = 0;
+		}
+		prev_hash = ent->hash;
+	}
+	if (left)
+		dirent->rec_len += left;
+
+	return 0;
+}
+
+
+static struct ext2_dx_root_info *set_root_node(ext2_filsys fs, char *buf,
+				    ext2_ino_t ino, ext2_ino_t parent)
+{
+	struct ext2_dir_entry 		*dir;
+	struct ext2_dx_root_info  	*root;
+	struct ext2_dx_countlimit	*limits;
+	int				filetype = 0;
+
+	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_FILETYPE)
+		filetype = EXT2_FT_DIR << 8;
+	
+	memset(buf, 0, fs->blocksize);
+	dir = (struct ext2_dir_entry *) buf;
+	dir->inode = ino;
+	dir->name[0] = '.';
+	dir->name_len = 1 | filetype;
+	dir->rec_len = 12;
+	dir = (struct ext2_dir_entry *) (buf + 12);
+	dir->inode = parent;
+	dir->name[0] = '.';
+	dir->name[1] = '.';
+	dir->name_len = 2 | filetype;
+	dir->rec_len = fs->blocksize - 12;
+	
+	root = (struct ext2_dx_root_info *) (buf+24);
+	root->reserved_zero = 0;
+	root->hash_version = fs->super->s_def_hash_version;
+	root->info_length = 8;
+	root->indirect_levels = 0;
+	root->unused_flags = 0;
+
+	limits = (struct ext2_dx_countlimit *) (buf+32);
+	limits->limit = (fs->blocksize - 32) / sizeof(struct ext2_dx_entry);
+	limits->count = 0;
+
+	return root;
+}
+
+
+static struct ext2_dx_entry *set_int_node(ext2_filsys fs, char *buf)
+{
+	struct ext2_dir_entry 		*dir;
+	struct ext2_dx_countlimit	*limits;
+
+	memset(buf, 0, fs->blocksize);
+	dir = (struct ext2_dir_entry *) buf;
+	dir->inode = 0;
+	dir->rec_len = fs->blocksize;
+	
+	limits = (struct ext2_dx_countlimit *) (buf+8);
+	limits->limit = (fs->blocksize - 8) / sizeof(struct ext2_dx_entry);
+	limits->count = 0;
+
+	return (struct ext2_dx_entry *) limits;
+}
+
+/*
+ * This function takes the leaf nodes which have been written in
+ * outdir, and populates the root node and any necessary interior nodes.
+ */
+static errcode_t calculate_tree(ext2_filsys fs,
+				struct out_dir *outdir,
+				ext2_ino_t ino,
+				ext2_ino_t parent)
+{
+	struct ext2_dx_root_info  	*root_info;
+	struct ext2_dx_entry 		*root, *dx_ent = 0;
+	struct ext2_dx_countlimit	*root_limit, *limit;
+	errcode_t			retval;
+	char				* block_start;
+	int				i, c1, c2, nblks;
+	int				limit_offset, root_offset;
+	
+	root_info = set_root_node(fs, outdir->buf, ino, parent);
+	root_offset = limit_offset = ((char *) root_info - outdir->buf) +
+		root_info->info_length;
+	root_limit = (struct ext2_dx_countlimit *) (outdir->buf + limit_offset);
+	c1 = root_limit->limit;
+	nblks = outdir->num;
+
+	/* Write out the pointer blocks */
+	if (nblks-1 <= c1) {
+		/* Just write out the root block, and we're done */
+		root = (struct ext2_dx_entry *) (outdir->buf + root_offset);
+		for (i=1; i < nblks; i++) {
+			root->block = ext2fs_cpu_to_le32(i);
+			if (i != 1)
+				root->hash =
+					ext2fs_cpu_to_le32(outdir->hashes[i]);
+			root++;
+			c1--;
+		}
+	} else {
+		c2 = 0;
+		limit = 0;
+		root_info->indirect_levels = 1;
+		for (i=1; i < nblks; i++) {
+			if (c1 == 0)
+				return ENOSPC;
+			if (c2 == 0) {
+				if (limit)
+					limit->limit = limit->count = 
+		ext2fs_cpu_to_le16(limit->limit);
+				root = (struct ext2_dx_entry *)
+					(outdir->buf + root_offset);
+				root->block = ext2fs_cpu_to_le32(outdir->num);
+				if (i != 1)
+					root->hash =
+			ext2fs_cpu_to_le32(outdir->hashes[i]);
+				if ((retval =  get_next_block(fs, outdir,
+							      &block_start)))
+					return retval;
+				dx_ent = set_int_node(fs, block_start);
+				limit = (struct ext2_dx_countlimit *) dx_ent;
+				c2 = limit->limit;
+				root_offset += sizeof(struct ext2_dx_entry);
+				c1--;
+			}
+			dx_ent->block = ext2fs_cpu_to_le32(i);
+			if (c2 != limit->limit)
+				dx_ent->hash =
+					ext2fs_cpu_to_le32(outdir->hashes[i]);
+			dx_ent++;
+			c2--;
+		}
+		limit->count = ext2fs_cpu_to_le16(limit->limit - c2);
+		limit->limit = ext2fs_cpu_to_le16(limit->limit);
+	}
+	root_limit = (struct ext2_dx_countlimit *) (outdir->buf + limit_offset);
+	root_limit->count = ext2fs_cpu_to_le16(root_limit->limit - c1);
+	root_limit->limit = ext2fs_cpu_to_le16(root_limit->limit);
+
+	return 0;
+}
+
+struct write_dir_struct {
+	struct out_dir *outdir;
+	errcode_t	err;
+	e2fsck_t	ctx;
+	int		cleared;
+};
+
+/*
+ * Helper function which writes out a directory block.
+ */
+static int write_dir_block(ext2_filsys fs,
+			   blk_t	*block_nr,
+			   e2_blkcnt_t blockcnt,
+			   blk_t ref_block EXT2FS_ATTR((unused)),
+			   int ref_offset EXT2FS_ATTR((unused)), 
+			   void *priv_data)
+{
+	struct write_dir_struct	*wd = (struct write_dir_struct *) priv_data;
+	blk_t	blk;
+	char	*dir;
+
+	if (*block_nr == 0)
+		return 0;
+	if (blockcnt >= wd->outdir->num) {
+		e2fsck_read_bitmaps(wd->ctx);
+		blk = *block_nr;
+		ext2fs_unmark_block_bitmap(wd->ctx->block_found_map, blk);
+		ext2fs_block_alloc_stats(fs, blk, -1);
+		*block_nr = 0;
+		wd->cleared++;
+		return BLOCK_CHANGED;
+	}
+	if (blockcnt < 0)
+		return 0;
+
+	dir = wd->outdir->buf + (blockcnt * fs->blocksize);
+	wd->err = ext2fs_write_dir_block(fs, *block_nr, dir);
+	if (wd->err)
+		return BLOCK_ABORT;
+	return 0;
+}
+
+static errcode_t write_directory(e2fsck_t ctx, ext2_filsys fs,
+				 struct out_dir *outdir,
+				 ext2_ino_t ino, int compress)
+{
+	struct write_dir_struct wd;
+	errcode_t	retval;
+	struct ext2_inode 	inode;
+
+	retval = e2fsck_expand_directory(ctx, ino, -1, outdir->num);
+	if (retval)
+		return retval;
+
+	wd.outdir = outdir;
+	wd.err = 0;
+	wd.ctx = ctx;
+	wd.cleared = 0;
+
+	retval = ext2fs_block_iterate2(fs, ino, 0, 0,
+				       write_dir_block, &wd);
+	if (retval)
+		return retval;
+	if (wd.err)
+		return wd.err;
+
+	e2fsck_read_inode(ctx, ino, &inode, "rehash_dir");
+	if (compress)
+		inode.i_flags &= ~EXT2_INDEX_FL;
+	else
+		inode.i_flags |= EXT2_INDEX_FL;
+	inode.i_size = outdir->num * fs->blocksize;
+	inode.i_blocks -= (fs->blocksize / 512) * wd.cleared;
+	e2fsck_write_inode(ctx, ino, &inode, "rehash_dir");
+
+	return 0;
+}
+
+errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino)
+{
+	ext2_filsys 		fs = ctx->fs;
+	errcode_t		retval;
+	struct ext2_inode 	inode;
+	char			*dir_buf = 0;
+	struct fill_dir_struct	fd;
+	struct out_dir		outdir;
+	
+	outdir.max = outdir.num = 0;
+	outdir.buf = 0;
+	outdir.hashes = 0;
+	e2fsck_read_inode(ctx, ino, &inode, "rehash_dir");
+
+	retval = ENOMEM;
+	fd.harray = 0;
+	dir_buf = malloc(inode.i_size);
+	if (!dir_buf)
+		goto errout;
+
+	fd.max_array = inode.i_size / 32;
+	fd.num_array = 0;
+	fd.harray = malloc(fd.max_array * sizeof(struct hash_entry));
+	if (!fd.harray)
+		goto errout;
+
+	fd.ctx = ctx;
+	fd.buf = dir_buf;
+	fd.inode = &inode;
+	fd.err = 0;
+	fd.dir_size = 0;
+	fd.compress = 0;
+	if (!(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
+	    (inode.i_size / fs->blocksize) < 2)
+		fd.compress = 1;
+	fd.parent = 0;
+
+	/* Read in the entire directory into memory */
+	retval = ext2fs_block_iterate2(fs, ino, 0, 0,
+				       fill_dir_block, &fd);
+	if (fd.err) {
+		retval = fd.err;
+		goto errout;
+	}
+
+#if 0
+	printf("%d entries (%d bytes) found in inode %d\n",
+	       fd.num_array, fd.dir_size, ino);
+#endif
+
+	/* Sort the list */
+resort:
+	if (fd.compress)
+		qsort(fd.harray+2, fd.num_array-2,
+		      sizeof(struct hash_entry), name_cmp);
+	else
+		qsort(fd.harray, fd.num_array,
+		      sizeof(struct hash_entry), hash_cmp);
+
+	/*
+	 * Look for duplicates
+	 */
+	if (duplicate_search_and_fix(ctx, fs, ino, &fd))
+		goto resort;
+
+	if (ctx->options & E2F_OPT_NO) {
+		retval = 0;
+		goto errout;
+	}
+
+	/*
+	 * Copy the directory entries.  In a htree directory these
+	 * will become the leaf nodes.
+	 */
+	retval = copy_dir_entries(fs, &fd, &outdir);
+	if (retval)
+		goto errout;
+	
+	free(dir_buf); dir_buf = 0;
+
+	if (!fd.compress) {
+		/* Calculate the interior nodes */
+		retval = calculate_tree(fs, &outdir, ino, fd.parent);
+		if (retval)
+			goto errout;
+	}
+	
+	retval = write_directory(ctx, fs, &outdir, ino, fd.compress);
+	if (retval)
+		goto errout;
+
+errout:
+	if (dir_buf)
+		free(dir_buf);
+	if (fd.harray)
+		free(fd.harray);
+
+	free_out_dir(&outdir);
+	return retval;
+}
+
+void e2fsck_rehash_directories(e2fsck_t ctx)
+{
+	struct problem_context	pctx;
+#ifdef RESOURCE_TRACK
+	struct resource_track	rtrack;
+#endif
+	struct dir_info		*dir;
+	ext2_u32_iterate 	iter;
+	ext2_ino_t		ino;
+	errcode_t		retval;
+	int			i, cur, max, all_dirs, dir_index, first = 1;
+
+#ifdef RESOURCE_TRACK
+	init_resource_track(&rtrack);
+#endif
+
+	all_dirs = ctx->options & E2F_OPT_COMPRESS_DIRS;
+
+	if (!ctx->dirs_to_hash && !all_dirs)
+		return;
+
+	e2fsck_get_lost_and_found(ctx, 0);
+		
+	clear_problem_context(&pctx);
+
+	dir_index = ctx->fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX;
+	cur = 0;
+	if (all_dirs) {
+		i = 0;
+		max = e2fsck_get_num_dirinfo(ctx);
+	} else {
+		retval = ext2fs_u32_list_iterate_begin(ctx->dirs_to_hash, 
+						       &iter);
+		if (retval) {
+			pctx.errcode = retval;
+			fix_problem(ctx, PR_3A_OPTIMIZE_ITER, &pctx);
+			return;
+		}
+		max = ext2fs_u32_list_count(ctx->dirs_to_hash);
+	}
+	while (1) {
+		if (all_dirs) {
+			if ((dir = e2fsck_dir_info_iter(ctx, &i)) == 0)
+				break;
+			ino = dir->ino;
+		} else {
+			if (!ext2fs_u32_list_iterate(iter, &ino))
+				break;
+		}
+		if (ino == ctx->lost_and_found)
+			continue;
+		pctx.dir = ino;
+		if (first) {
+			fix_problem(ctx, PR_3A_PASS_HEADER, &pctx);
+			first = 0;
+		}
+#if 0
+		fix_problem(ctx, PR_3A_OPTIMIZE_DIR, &pctx);
+#endif
+		pctx.errcode = e2fsck_rehash_dir(ctx, ino);
+		if (pctx.errcode) {
+			end_problem_latch(ctx, PR_LATCH_OPTIMIZE_DIR);
+			fix_problem(ctx, PR_3A_OPTIMIZE_DIR_ERR, &pctx);
+		}
+		if (ctx->progress && !ctx->progress_fd)
+			e2fsck_simple_progress(ctx, "Rebuilding directory",
+			       100.0 * (float) (++cur) / (float) max, ino);
+	}
+	end_problem_latch(ctx, PR_LATCH_OPTIMIZE_DIR);
+	if (!all_dirs)
+		ext2fs_u32_list_iterate_end(iter);
+	
+	if (ctx->dirs_to_hash)
+		ext2fs_u32_list_free(ctx->dirs_to_hash);
+	ctx->dirs_to_hash = 0;
+
+#ifdef RESOURCE_TRACK
+	if (ctx->options & E2F_OPT_TIME2) {
+		e2fsck_clear_progbar(ctx);
+		print_resource_track("Pass 3A", &rtrack);
+	}
+#endif
+}