From: Andreas Dilger <andreas.dilger@intel.com>
Date: Thu, 17 May 2018 03:43:16 +0000 (+1000)
Subject: e2fsck: add support for dirdata feature
X-Git-Tag: v1.47.1-wc1~22
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=ab446e2c921d179723eb6ceaa20f272f1985a62e;p=tools%2Fe2fsprogs.git

e2fsck: add support for dirdata feature

Add support for the INCOMPAT_DIRDATA feature, which allows
storing extra data in the directory entry beyond the name.
This allows the Lustre File IDentifier to be accessed in
an efficient manner, and would be useful for expanding a
filesystem to allow more than 2^32 inodes in the future.

While adding the new file entry in directory block, link_proc()
calculates minimum record length of the existing directory entry
without considering the dirent data size and which leads to
corruption. Changed the code to use EXT2_DIR_REC_LEN() which will
return correct record length including dirent data size.

Change-Id: I1b81948b5bf114822ab140cb989c3a7e81fdc6f5
Lustre-bug-id: https://jira.hpdd.intel.com/browse/LU-4677
Signed-off-by: Pravin Shelar <pravin@clusterfs.com>
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---

diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in
index 7cf5c16..1225f88 100644
--- a/debugfs/debugfs.8.in
+++ b/debugfs/debugfs.8.in
@@ -573,7 +573,7 @@ Instead, it will stop only when the entire log is printed or after
 .I num_trans
 transactions.
 .TP
-.BI ls " [-l] [-c] [-d] [-p] [-r] filespec"
+.BI ls " [-l] [-c] [-d] [-p] [-r] [-D] filespec"
 Print a listing of the files in the directory
 .IR filespec .
 The
@@ -593,6 +593,11 @@ non-printing characters at the end of filenames.
 The
 .I \-r
 flag will force the printing of the filename, even if it is encrypted.
+The
+.I \-D
+flag will print the extra data found inside each entry when the
+.I \-l
+flag is used.
 .TP
 .BI list_deleted_inodes " [limit]"
 List deleted inodes, optionally limited to those deleted within
diff --git a/debugfs/htree.c b/debugfs/htree.c
index a100815..2497b93 100644
--- a/debugfs/htree.c
+++ b/debugfs/htree.c
@@ -298,7 +298,7 @@ void do_htree_dump(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
 		goto errout;
 	}
 
-	rootnode = (struct ext2_dx_root_info *) (buf + 24);
+	rootnode = get_ext2_dx_root_info(current_fs, buf);
 
 	fprintf(pager, "Root node dump:\n");
 	fprintf(pager, "\t Reserved zero: %u\n", rootnode->reserved_zero);
diff --git a/debugfs/ls.c b/debugfs/ls.c
index 613ad73..b36c42e 100644
--- a/debugfs/ls.c
+++ b/debugfs/ls.c
@@ -24,6 +24,7 @@ extern char *optarg;
 #endif
 
 #include "debugfs.h"
+#include "ext2fs/lfsck.h"
 
 /*
  * list directory
@@ -32,6 +33,7 @@ extern char *optarg;
 #define LONG_OPT	0x0001
 #define PARSE_OPT	0x0002
 #define RAW_OPT		0x0004
+#define DIRDATA_OPT	0x0008
 #define ENCRYPT_OPT	0x8000
 
 struct list_dir_struct {
@@ -44,6 +46,41 @@ struct list_dir_struct {
 static const char *monstr[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
 				"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 
+static void list_dirdata(struct list_dir_struct *ls,
+			 struct ext2_dir_entry *dirent)
+{
+	unsigned char	*data;
+	int		dlen;
+	__u8		dirdata_mask;
+	__u8		file_type = dirent->name_len >> 8;
+
+	data = (unsigned char *)dirent->name +
+		(dirent->name_len & EXT2_NAME_LEN) + 1;
+
+	for (dirdata_mask = EXT2_FT_MASK + 1;
+	     dirdata_mask != 0; dirdata_mask <<= 1) {
+		if ((dirdata_mask & file_type) == 0)
+			continue;
+
+		dlen = data[0];
+
+		if (dirdata_mask == EXT2_DIRENT_LUFID) {
+			struct lu_fid *fid = (struct lu_fid *)(data + 1);
+
+			fid_be_to_cpu(fid, fid);
+			fprintf(ls->f, "fid:"DFID, PFID(fid));
+		} else {
+			int i;
+
+			for (i = 1; i < dlen; i++)
+				fprintf(ls->f, "%02x", data[i]);
+		}
+
+		fprintf(ls->f, " ");
+		data += dlen;
+	}
+}
+
 static int print_filename(FILE *f, struct ext2_dir_entry *dirent, int options)
 {
 	unsigned char	ch;
@@ -147,6 +184,8 @@ static int list_dir_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
 			fprintf(ls->f, "%5llu",
 				(unsigned long long) EXT2_I_SIZE(&inode));
 		fprintf(ls->f, " %s ", datestr);
+		if ((ls->options & DIRDATA_OPT) != 0)
+			list_dirdata(ls, dirent);
 		print_filename(ls->f, dirent, options);
 		fputc('\n', ls->f);
 	} else {
@@ -195,7 +234,7 @@ void do_list_dir(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
 		return;
 
 	reset_getopt();
-	while ((c = getopt (argc, argv, "cdlpr")) != EOF) {
+	while ((c = getopt(argc, argv, "cdDlpr")) != EOF) {
 		switch (c) {
 		case 'c':
 			flags |= DIRENT_FLAG_INCLUDE_CSUM;
@@ -203,6 +242,9 @@ void do_list_dir(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
 		case 'l':
 			ls.options |= LONG_OPT;
 			break;
+		case 'D':
+			ls.options |= DIRDATA_OPT;
+			break;
 		case 'd':
 			flags |= DIRENT_FLAG_INCLUDE_REMOVED;
 			break;
@@ -219,7 +261,7 @@ void do_list_dir(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
 
 	if (argc > optind+1) {
 	print_usage:
-		com_err(0, 0, "Usage: ls [-c] [-d] [-l] [-p] [-r] file");
+		com_err(0, 0, "Usage: ls [-c] [-d] [-l] [-p] [-r] [-D] file");
 		return;
 	}
 
diff --git a/debugfs/ncheck.c b/debugfs/ncheck.c
index 1410e7c..03d1e49 100644
--- a/debugfs/ncheck.c
+++ b/debugfs/ncheck.c
@@ -51,6 +51,9 @@ static int ncheck_proc(struct ext2_dir_entry *dirent,
 	iw->position++;
 	if (iw->position <= 2)
 		return 0;
+	if (current_fs->super->s_feature_incompat &
+	    EXT4_FEATURE_INCOMPAT_DIRDATA)
+		filetype &= EXT2_FT_MASK;
 	for (i=0; i < iw->num_inodes; i++) {
 		if (iw->iarray[i] == dirent->inode) {
 			if (!iw->parent && !iw->get_pathname_failed) {
diff --git a/e2fsck/message.c b/e2fsck/message.c
index 9c42b13..6210113 100644
--- a/e2fsck/message.c
+++ b/e2fsck/message.c
@@ -99,6 +99,7 @@
 
 #include "e2fsck.h"
 #include "problem.h"
+#include "ext2fs/lfsck.h"
 
 #ifdef __GNUC__
 #define _INLINE_ __inline__
@@ -346,6 +347,33 @@ static _INLINE_ void expand_inode_expression(FILE *f, ext2_filsys fs, char ch,
 	}
 }
 
+const struct lu_fid *get_dirent_fid(struct ext2_dir_entry *dirent)
+{
+	unsigned char *data = (unsigned char *)dirent->name +
+			      (dirent->name_len & EXT2_NAME_LEN) + 1;
+	__u8 file_type = dirent->name_len >> 8;
+	struct lu_fid *fid = NULL;
+	__u8 dirdata_mask;
+
+	for (dirdata_mask = EXT2_FT_MASK + 1;
+	     dirdata_mask != 0; dirdata_mask <<= 1) {
+		int dlen;
+
+		if ((dirdata_mask & file_type) == 0)
+			continue;
+
+		dlen = data[0];
+		if (dirdata_mask == EXT2_DIRENT_LUFID) {
+			fid = (struct lu_fid *)(data + 1);
+			fid_be_to_cpu(fid, fid);
+			break;
+		}
+		data += dlen;
+	}
+
+	return fid;
+}
+
 /*
  * This function expands '%dX' expressions
  */
@@ -361,9 +389,17 @@ static _INLINE_ void expand_dirent_expression(FILE *f, ext2_filsys fs, char ch,
 	dirent = ctx->dirent;
 
 	switch (ch) {
-	case 'i':
+	case 'i': {
+		const struct lu_fid *fid;
+
 		fprintf(f, "%u", dirent->inode);
+
+		fid = get_dirent_fid(dirent);
+		if (fid != NULL)
+			fprintf(f, " fid="DFID, PFID(fid));
+
 		break;
+	}
 	case 'n':
 		len = ext2fs_dirent_name_len(dirent);
 		if ((ext2fs_get_rec_len(fs, dirent, &rec_len) == 0) &&
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index d3ed9fc..05e86e1 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -819,7 +819,7 @@ static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 		 */
 		memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 		memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
-		       EXT2_DIR_REC_LEN(0));
+		       EXT2_DIR_NAME_LEN(0));
 		dotdot = ext2fs_le32_to_cpu(dotdot);
 		de.inode = ext2fs_le32_to_cpu(de.inode);
 		de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
@@ -4555,7 +4555,7 @@ static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
 	}
 
 	/* XXX should check that beginning matches a directory */
-	root = (struct ext2_dx_root_info *) (block_buf + 24);
+	root = get_ext2_dx_root_info(fs, block_buf);
 
 	if ((root->reserved_zero || root->info_length < 8) &&
 	    fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
diff --git a/e2fsck/pass2.c b/e2fsck/pass2.c
index 73ded11..d02c30f 100644
--- a/e2fsck/pass2.c
+++ b/e2fsck/pass2.c
@@ -395,13 +395,88 @@ static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b)
 	return (int) (db_a->blockcnt - db_b->blockcnt);
 }
 
+void ext2_fix_dirent_dirdata(struct ext2_dir_entry *de)
+{
+	__u16 file_type = de->name_len & (EXT2_FT_MASK << 8);
+	__u8 de_flags = (de->name_len >> 8) & ~EXT2_FT_MASK;
+	__u8 name_len = de->name_len & EXT2_NAME_LEN;
+	__u8 new_flag = 0;
+	int i;
+
+	for (i = 0; i < 4; i++) {
+		__u8 flags = new_flag | (1 << i) << 4;
+
+		/* new_flag is accumulating flags that are set in de_flags
+		 * and still fit inside rec_len. ext2_get_dirent_dirdata_size()
+		 * returns the size of all the dirdata entries in flags, and
+		 * chops off any that are beyond rec_len.
+		 */
+		if ((de_flags & flags) == flags) {
+			int dirdatalen = ext2_get_dirdata_field_size(de,
+								      flags);
+			int rlen = EXT2_DIR_NAME_LEN(name_len + dirdatalen);
+
+			if (rlen > de->rec_len)
+				break;
+
+			new_flag |= flags;
+		}
+	}
+
+	de->name_len = name_len | file_type | (new_flag << 8);
+}
+
+/*
+ * check for dirent data in ext3 dirent.
+ * return 0 if dirent data is ok.
+ * return 1 if dirent data does not exist.
+ * return 2 if dirent was modified due to error.
+ */
+int e2fsck_check_dirent_data(e2fsck_t ctx, struct ext2_dir_entry *de,
+			     unsigned int offset, struct problem_context *pctx)
+{
+	if (!(ctx->fs->super->s_feature_incompat &
+			EXT4_FEATURE_INCOMPAT_DIRDATA)) {
+		if ((de->name_len >> 8) & ~EXT2_FT_MASK) {
+			/* clear dirent extra data flags. */
+			if (fix_problem(ctx, PR_2_CLEAR_DIRDATA, pctx)) {
+				de->name_len &= (EXT2_FT_MASK << 8) |
+						EXT2_NAME_LEN;
+				return 2;
+			}
+		}
+		return 1;
+	}
+	if ((de->name_len >> 8) & ~EXT2_FT_MASK) {
+		if (de->rec_len >= EXT2_DIR_REC_LEN(de) ||
+		    de->rec_len + offset == EXT2_BLOCK_SIZE(ctx->fs->super)) {
+			if (ext2_get_dirdata_field_size(de,
+							 EXT2_DIRENT_LUFID) %
+			    EXT2_DIRENT_LUFID_SIZE == 1 /*size*/ + 1 /*NULL*/)
+				return 0;
+		}
+		/* just clear dirent data flags for now, we should fix FID data
+		 * in lustre specific pass.
+		 */
+		if (fix_problem(ctx, PR_2_CLEAR_DIRDATA, pctx)) {
+			ext2_fix_dirent_dirdata(de);
+			if (ext2_get_dirdata_field_size(de,
+							 EXT2_DIRENT_LUFID) !=
+			    EXT2_DIRENT_LUFID_SIZE)
+				de->name_len &= ~(EXT2_DIRENT_LUFID << 8);
+
+			return 2;
+		}
+	}
+	return 1;
+}
 
 /*
  * Make sure the first entry in the directory is '.', and that the
  * directory entry is sane.
  */
 static int check_dot(e2fsck_t ctx,
-		     struct ext2_dir_entry *dirent,
+		     struct ext2_dir_entry *dirent, unsigned int offset,
 		     ext2_ino_t ino, struct problem_context *pctx)
 {
 	struct ext2_dir_entry *nextdir;
@@ -410,6 +485,7 @@ static int check_dot(e2fsck_t ctx,
 	int		created = 0;
 	problem_t	problem = 0;
 	int		ftype = EXT2_FT_DIR;
+	int		dir_data_error;
 
 	if (!dirent->inode)
 		problem = PR_2_MISSING_DOT;
@@ -419,12 +495,14 @@ static int check_dot(e2fsck_t ctx,
 	else if (dirent->name[1] != '\0')
 		problem = PR_2_DOT_NULL_TERM;
 
+	dir_data_error = e2fsck_check_dirent_data(ctx, dirent, offset, pctx);
+
 	(void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 	if (problem) {
 		if (!ext2fs_has_feature_filetype(ctx->fs->super))
 			ftype = EXT2_FT_UNKNOWN;
 		if (fix_problem(ctx, problem, pctx)) {
-			if (rec_len < 12)
+			if (rec_len < 12 && dir_data_error)
 				rec_len = dirent->rec_len = 12;
 			dirent->inode = ino;
 			ext2fs_dirent_set_name_len(dirent, 1);
@@ -443,7 +521,7 @@ static int check_dot(e2fsck_t ctx,
 	}
 	if (rec_len > 12) {
 		new_len = rec_len - 12;
-		if (new_len > 12) {
+		if (new_len > 12 && dir_data_error) {
 			if (created ||
 			    fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
 				nextdir = (struct ext2_dir_entry *)
@@ -480,12 +558,13 @@ static int check_dot(e2fsck_t ctx,
  * here; this gets done in pass 3.
  */
 static int check_dotdot(e2fsck_t ctx,
-			struct ext2_dir_entry *dirent,
+			struct ext2_dir_entry *dirent, unsigned int offset,
 			ext2_ino_t ino, struct problem_context *pctx)
 {
 	problem_t	problem = 0;
 	unsigned int	rec_len;
 	int		ftype = EXT2_FT_DIR;
+	int		dir_data_error;
 
 	if (!dirent->inode)
 		problem = PR_2_MISSING_DOT_DOT;
@@ -496,12 +575,14 @@ static int check_dotdot(e2fsck_t ctx,
 	else if (dirent->name[2] != '\0')
 		problem = PR_2_DOT_DOT_NULL_TERM;
 
+	dir_data_error = e2fsck_check_dirent_data(ctx, dirent, offset, pctx);
+
 	(void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 	if (problem) {
 		if (!ext2fs_has_feature_filetype(ctx->fs->super))
 			ftype = EXT2_FT_UNKNOWN;
 		if (fix_problem(ctx, problem, pctx)) {
-			if (rec_len < 12)
+			if (rec_len < 12 && dir_data_error)
 				dirent->rec_len = 12;
 			/*
 			 * Note: we don't have the parent inode just
@@ -598,6 +679,12 @@ static _INLINE_ int check_filetype(e2fsck_t ctx,
 	int	should_be = EXT2_FT_UNKNOWN;
 	__u16	badness = 0;
 	struct ext2_inode	inode;
+	__u8    dirdata = 0;
+
+	if (ext2fs_has_feature_dirdata(ctx->fs->super)) {
+		dirdata = filetype & ~EXT2_FT_MASK;
+		filetype = filetype & EXT2_FT_MASK;
+	}
 
 	if (!ext2fs_has_feature_filetype(ctx->fs->super)) {
 		if (filetype == 0 ||
@@ -628,8 +715,7 @@ static _INLINE_ int check_filetype(e2fsck_t ctx,
 	if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
 			pctx) == 0)
 		return 0;
-
-	ext2fs_dirent_set_file_type(dirent, should_be);
+	ext2fs_dirent_set_file_type(dirent, should_be | dirdata);
 	return 1;
 }
 
@@ -651,7 +737,7 @@ static void parse_int_node(ext2_filsys fs,
 	int		csum_size = 0;
 
 	if (db->blockcnt == 0) {
-		root = (struct ext2_dx_root_info *) (block_buf + 24);
+		root = get_ext2_dx_root_info(fs, block_buf);
 
 #ifdef DX_DEBUG
 		printf("Root node dump:\n");
@@ -661,8 +747,8 @@ static void parse_int_node(ext2_filsys fs,
 		printf("\t Indirect levels: %u\n", root->indirect_levels);
 		printf("\t Flags: %x\n", root->unused_flags);
 #endif
-
-		ent = (struct ext2_dx_entry *) (block_buf + 24 + root->info_length);
+		ent = (struct ext2_dx_entry *)((char *)root +
+					       root->info_length);
 
 		if (failed_csum &&
 		    (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
@@ -670,7 +756,7 @@ static void parse_int_node(ext2_filsys fs,
 				&cd->pctx)))
 			goto clear_and_exit;
 	} else {
-		ent = (struct ext2_dx_entry *) (block_buf+8);
+		ent = (struct ext2_dx_entry *)(block_buf + 8);
 
 		if (failed_csum &&
 		    (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
@@ -678,8 +764,7 @@ static void parse_int_node(ext2_filsys fs,
 				&cd->pctx)))
 			goto clear_and_exit;
 	}
-
-	limit = (struct ext2_dx_countlimit *) ent;
+	limit = (struct ext2_dx_countlimit *)ent;
 
 #ifdef DX_DEBUG
 	printf("Number of entries (count): %d\n",
@@ -853,7 +938,6 @@ static void salvage_directory(ext2_filsys fs,
 	}
 }
 
-#define NEXT_DIRENT(d)	((void *)((char *)(d) + (d)->rec_len))
 static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
 {
 	struct ext2_dir_entry *d;
@@ -863,11 +947,11 @@ static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
 	d = dirbuf;
 	top = EXT2_DIRENT_TAIL(dirbuf, fs->blocksize);
 
-	while (d->rec_len && !(d->rec_len & 0x3) && NEXT_DIRENT(d) <= top)
-		d = NEXT_DIRENT(d);
+	while (d->rec_len && !(d->rec_len & 0x3) && EXT2_NEXT_DIRENT(d) <= top)
+		d = EXT2_NEXT_DIRENT(d);
 
 	if (d != top) {
-		unsigned int min_size = EXT2_DIR_REC_LEN(
+		unsigned int min_size = EXT2_DIR_NAME_LEN(
 				ext2fs_dirent_name_len(dirbuf));
 		if (min_size > (char *)top - (char *)d)
 			return EXT2_ET_DIR_NO_SPACE_FOR_CSUM;
@@ -882,7 +966,6 @@ static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
 
 	return 0;
 }
-#undef NEXT_DIRENT
 
 static errcode_t fix_inline_dir_size(e2fsck_t ctx, ext2_ino_t ino,
 				     size_t *inline_data_size,
@@ -901,7 +984,7 @@ static errcode_t fix_inline_dir_size(e2fsck_t ctx, ext2_ino_t ino,
 	 */
 	if (old_size > EXT4_MIN_INLINE_DATA_SIZE &&
 	    old_size < EXT4_MIN_INLINE_DATA_SIZE +
-		       EXT2_DIR_REC_LEN(1)) {
+		       EXT2_DIR_NAME_LEN(1)) {
 		old_size = EXT4_MIN_INLINE_DATA_SIZE;
 		new_size = old_size;
 	} else
@@ -1188,7 +1271,7 @@ inline_read_fail:
 	if (((inline_data_size & 3) ||
 	     (inline_data_size > EXT4_MIN_INLINE_DATA_SIZE &&
 	      inline_data_size < EXT4_MIN_INLINE_DATA_SIZE +
-				 EXT2_DIR_REC_LEN(1))) &&
+				 EXT2_DIR_NAME_LEN(1))) &&
 	    fix_problem(ctx, PR_2_BAD_INLINE_DIR_SIZE, &pctx)) {
 		errcode_t err = fix_inline_dir_size(ctx, ino,
 						    &inline_data_size, &pctx,
@@ -1238,7 +1321,7 @@ inline_read_fail:
 		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
 		limit = (struct ext2_dx_countlimit *) (buf+8);
 		if (db->blockcnt == 0) {
-			root = (struct ext2_dx_root_info *) (buf + 24);
+			root = get_ext2_dx_root_info(fs, buf);
 			dx_db->type = DX_DIRBLOCK_ROOT;
 			dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
 
@@ -1410,7 +1493,7 @@ skip_checksum:
 				memset(&dot, 0, sizeof(dot));
 				dirent = &dot;
 				dirent->inode = ino;
-				dirent->rec_len = EXT2_DIR_REC_LEN(1);
+				dirent->rec_len = EXT2_DIR_NAME_LEN(1);
 				dirent->name_len = 1 | filetype;
 				dirent->name[0] = '.';
 			} else if (dot_state == 1) {
@@ -1418,7 +1501,7 @@ skip_checksum:
 				dirent = &dotdot;
 				dirent->inode =
 					((struct ext2_dir_entry *)buf)->inode;
-				dirent->rec_len = EXT2_DIR_REC_LEN(2);
+				dirent->rec_len = EXT2_DIR_NAME_LEN(2);
 				dirent->name_len = 2 | filetype;
 				dirent->name[0] = '.';
 				dirent->name[1] = '.';
@@ -1430,10 +1513,10 @@ skip_checksum:
 		}
 
 		if (dot_state == 0) {
-			if (check_dot(ctx, dirent, ino, &cd->pctx))
+			if (check_dot(ctx, dirent, offset, ino, &cd->pctx))
 				dir_modified++;
 		} else if (dot_state == 1) {
-			ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
+			ret = check_dotdot(ctx, dirent, offset, ino, &cd->pctx);
 			if (ret < 0)
 				goto abort_free_dict;
 			if (ret)
@@ -1449,6 +1532,10 @@ skip_checksum:
 		if (!dirent->inode)
 			goto next;
 
+		ret = e2fsck_check_dirent_data(ctx, dirent, offset, &cd->pctx);
+		if (ret == 2)
+			dir_modified++;
+
 		/*
 		 * Make sure the inode listed is a legal one.
 		 */
diff --git a/e2fsck/pass3.c b/e2fsck/pass3.c
index a685946..83f583f 100644
--- a/e2fsck/pass3.c
+++ b/e2fsck/pass3.c
@@ -713,6 +713,7 @@ static int fix_dotdot_proc(struct ext2_dir_entry *dirent,
 	struct fix_dotdot_struct *fp = (struct fix_dotdot_struct *) priv_data;
 	errcode_t	retval;
 	struct problem_context pctx;
+	__u16 dirdata = 0;
 
 	if (ext2fs_dirent_name_len(dirent) != 2)
 		return 0;
@@ -732,11 +733,17 @@ static int fix_dotdot_proc(struct ext2_dir_entry *dirent,
 		fix_problem(fp->ctx, PR_3_ADJUST_INODE, &pctx);
 	}
 	dirent->inode = fp->parent;
+
+	dirdata  = dirent->name_len & ((__u16)~EXT2_FT_MASK << 8);
+
 	if (ext2fs_has_feature_filetype(fp->ctx->fs->super))
 		ext2fs_dirent_set_file_type(dirent, EXT2_FT_DIR);
 	else
 		ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
 
+	if (ext2fs_has_feature_dirdata(fp->ctx->fs->super))
+		dirent->name_len |= dirdata;
+
 	fp->done++;
 	return DIRENT_ABORT | DIRENT_CHANGED;
 }
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index 043e0dd..12e2db0 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1942,6 +1942,11 @@ static struct e2fsck_problem problem_table[] = {
 	  N_("@i %i is badly corrupt (badness value = %N).  "),
 	  PROMPT_CLEAR, PR_PREEN_OK },
 
+	/* Directory entry dirdata length set incorrectly */
+	{ PR_2_CLEAR_DIRDATA,
+	  N_("@E dirdata length set incorrectly.\n"),
+	  PROMPT_CLEAR, PR_PREEN_OK },
+
 	/* Pass 3 errors */
 
 	/* Pass 3: Checking directory connectivity */
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 5ebcf9a..ecf3278 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -1120,6 +1120,9 @@ struct problem_context {
 /* Inode is badly corrupt (badness value = ) */
 #define PR_2_INODE_TOOBAD		0x020056
 
+/* Entry dirdata length set incorrectly */
+#define PR_2_CLEAR_DIRDATA		0x020057
+
 /*
  * Pass 3 errors
  */
diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
index 4847d17..6b123c0 100644
--- a/e2fsck/rehash.c
+++ b/e2fsck/rehash.c
@@ -86,6 +86,8 @@ struct fill_dir_struct {
 	int compress;
 	ext2_ino_t parent;
 	ext2_ino_t dir;
+	struct ext2_dir_entry *dot_de;
+	struct ext2_dir_entry *dotdot_de;
 };
 
 struct hash_entry {
@@ -187,11 +189,14 @@ static int fill_dir_block(ext2_filsys fs,
 			return BLOCK_ABORT;
 		}
 		if (!fd->compress && (name_len == 1) &&
-		    (dirent->name[0] == '.'))
+		    (dirent->name[0] == '.')) {
+			fd->dot_de = dirent;
 			continue;
+		}
 		if (!fd->compress && (name_len == 2) &&
 		    (dirent->name[0] == '.') && (dirent->name[1] == '.')) {
 			fd->parent = dirent->inode;
+			fd->dotdot_de = dirent;
 			continue;
 		}
 		if (fd->num_array >= fd->max_array) {
@@ -209,7 +214,7 @@ static int fill_dir_block(ext2_filsys fs,
 		}
 		ent = fd->harray + fd->num_array++;
 		ent->dir = dirent;
-		fd->dir_size += ext2fs_dir_rec_len(name_len, extended);
+		fd->dir_size += ext2fs_dirdata_rec_len(dirent, extended);
 		ent->ino = dirent->inode;
 		if (extended) {
 			ent->hash = EXT2_DIRENT_HASH(dirent);
@@ -587,8 +592,7 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
 		ent = fd->harray + i;
 		if (ent->dir->inode == 0)
 			continue;
-		rec_len = ext2fs_dir_rec_len(ext2fs_dirent_name_len(ent->dir),
-					     hash_in_entry);
+		rec_len = ext2fs_dirdata_rec_len(ent->dir, hash_in_entry);
 		if (rec_len > left) {
 			if (left) {
 				left += prev_rec_len;
@@ -623,8 +627,7 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
 		if (retval)
 			return retval;
 		prev_rec_len = rec_len;
-		memcpy(dirent->name, ent->dir->name,
-		       ext2fs_dirent_name_len(dirent));
+		memcpy(dirent->name, ent->dir->name, rec_len);
 		if (hash_in_entry) {
 			EXT2_DIRENT_HASHES(dirent)->hash = ext2fs_cpu_to_le32(ent->hash);
 			EXT2_DIRENT_HASHES(dirent)->minor_hash =
@@ -655,47 +658,52 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
 
 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 *dot_de,
+				    struct ext2_dir_entry *dotdot_de,
 				    struct ext2_inode *inode)
 {
-	struct ext2_dir_entry 		*dir;
-	struct ext2_dx_root_info  	*root;
+	struct ext2_dir_entry		*dirent;
+	struct ext2_dx_root_info	*root;
 	struct ext2_dx_countlimit	*limits;
-	int				filetype = 0;
 	int				csum_size = 0;
-
-	if (ext2fs_has_feature_filetype(fs->super))
-		filetype = EXT2_FT_DIR;
+	int				offset;
+	int				rec_len;
 
 	memset(buf, 0, fs->blocksize);
-	dir = (struct ext2_dir_entry *) buf;
-	dir->inode = ino;
-	dir->name[0] = '.';
-	ext2fs_dirent_set_name_len(dir, 1);
-	ext2fs_dirent_set_file_type(dir, filetype);
-	dir->rec_len = 12;
-	dir = (struct ext2_dir_entry *) (buf + 12);
-	dir->inode = parent;
-	dir->name[0] = '.';
-	dir->name[1] = '.';
-	ext2fs_dirent_set_name_len(dir, 2);
-	ext2fs_dirent_set_file_type(dir, filetype);
-	dir->rec_len = fs->blocksize - 12;
-
-	root = (struct ext2_dx_root_info *) (buf+24);
+	dirent = (struct ext2_dir_entry *) buf;
+	dirent->inode = ino;
+
+	dirent->name_len = dot_de->name_len;
+	offset = rec_len = dirent->rec_len = dot_de->rec_len;
+	memcpy(dirent->name, dot_de->name, rec_len);
+
+	dirent = EXT2_NEXT_DIRENT(dirent);
+	/* set to jump over the index block */
+
+	dirent->inode = parent;
+
+	dirent->name_len = dotdot_de->name_len;
+	dirent->rec_len = fs->blocksize - rec_len;
+	rec_len = EXT2_DIR_REC_LEN(dotdot_de);
+	memcpy(dirent->name, dotdot_de->name, rec_len);
+	offset += rec_len;
+
+	root = (struct ext2_dx_root_info *)(buf + offset);
 	root->reserved_zero = 0;
 	if (ext4_hash_in_dirent(inode))
 		root->hash_version = EXT2_HASH_SIPHASH;
 	else
 		root->hash_version = fs->super->s_def_hash_version;
-	root->info_length = 8;
+	root->info_length = sizeof(*root);
 	root->indirect_levels = 0;
 	root->unused_flags = 0;
+	offset += root->info_length;
 
 	if (ext2fs_has_feature_metadata_csum(fs->super))
 		csum_size = sizeof(struct ext2_dx_tail);
 
-	limits = (struct ext2_dx_countlimit *) (buf+32);
-	limits->limit = (fs->blocksize - (32 + csum_size)) /
+	limits = (struct ext2_dx_countlimit *) (buf + offset);
+	limits->limit = (fs->blocksize - (offset + csum_size)) /
 			sizeof(struct ext2_dx_entry);
 	limits->count = 0;
 
@@ -773,6 +781,8 @@ static errcode_t calculate_tree(ext2_filsys fs,
 				struct out_dir *outdir,
 				ext2_ino_t ino,
 				ext2_ino_t parent,
+				struct ext2_dir_entry *dot_de,
+				struct ext2_dir_entry *dotdot_de,
 				struct ext2_inode *inode)
 {
 	struct ext2_dx_root_info	*root_info;
@@ -782,7 +792,9 @@ static errcode_t calculate_tree(ext2_filsys fs,
 	int				i, c1, c2, c3, nblks;
 	int				limit_offset, int_offset, root_offset;
 
-	root_info = set_root_node(fs, outdir->buf, ino, parent, inode);
+	root_info = set_root_node(fs, outdir->buf, ino, parent, dot_de,
+				  dotdot_de, inode);
+
 	root_offset = limit_offset = ((char *) root_info - outdir->buf) +
 		root_info->info_length;
 	root_limit = (struct ext2_dx_countlimit *) (outdir->buf + limit_offset);
@@ -1087,11 +1099,10 @@ resort:
 	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, fd.inode);
+		retval = calculate_tree(fs, &outdir, ino, fd.parent,
+					fd.dot_de, fd.dotdot_de, fd.inode);
 		if (retval)
 			goto errout;
 	}
diff --git a/e2fsck/unix.c b/e2fsck/unix.c
index eca5d87..6564175 100644
--- a/e2fsck/unix.c
+++ b/e2fsck/unix.c
@@ -1988,6 +1988,14 @@ print_unsupp_features:
 		goto get_newer;
 	}
 
+	if (ext2fs_has_feature_dirdata(sb) &&
+	    ext2fs_has_feature_casefold(sb)) {
+		com_err(ctx->program_name, 0,
+			_("%s has both casefold and dirdata, aborting fsck"),
+			ctx->filesystem_name);
+		fatal_error(ctx, 0);
+	}
+
 	if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
 		log_err(ctx, _("%s has unsupported encoding: %0x\n"),
 			ctx->filesystem_name, sb->s_encoding);
diff --git a/lib/ext2fs/dirblock.c b/lib/ext2fs/dirblock.c
index 54b2777..3563138 100644
--- a/lib/ext2fs/dirblock.c
+++ b/lib/ext2fs/dirblock.c
@@ -50,6 +50,39 @@ errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
 	return ext2fs_read_dir_block4(fs, block, buf, flags, 0);
 }
 
+/*
+ * Compute the dirdata length. This includes only optional extensions.
+ * Each extension has a bit set in the high 4 bits of
+ * de->file_type, and the extension length is the first byte in each entry.
+ */
+int ext2_get_dirdata_field_size(struct ext2_dir_entry *de,
+				 char dirdata_flags)
+{
+	char *lenp = de->name + (de->name_len & EXT2_NAME_LEN) + 1 /* NUL */;
+	__u8 extra_data_flags = (de->name_len & ~(EXT2_FT_MASK << 8)) >> 12;
+	int dlen = 0;
+
+	dirdata_flags >>= 4;
+	while ((extra_data_flags & dirdata_flags) != 0) {
+		if (extra_data_flags & 1) {
+			if (dirdata_flags & 1)
+				dlen += *lenp;
+
+			lenp += *lenp;
+		}
+		extra_data_flags >>= 1;
+		dirdata_flags >>= 1;
+	}
+
+	/* add NUL terminator byte to dirdata length */
+	return dlen + (dlen != 0);
+}
+
+int ext2_get_dirdata_size(struct ext2_dir_entry *de)
+{
+	return ext2_get_dirdata_field_size(de, ~EXT2_FT_MASK);
+}
+
 errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
 				 void *buf, int flags EXT2FS_ATTR((unused)))
 {
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index 5972b53..038a9d5 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -979,7 +979,8 @@ EXT4_FEATURE_INCOMPAT_FUNCS(casefold,		4, CASEFOLD)
 #define EXT2_FEATURE_INCOMPAT_SUPP    (EXT2_FEATURE_INCOMPAT_FILETYPE| \
 				       EXT4_FEATURE_INCOMPAT_MMP| \
 				       EXT4_FEATURE_INCOMPAT_LARGEDIR| \
-				       EXT4_FEATURE_INCOMPAT_EA_INODE)
+				       EXT4_FEATURE_INCOMPAT_EA_INODE| \
+				       EXT4_FEATURE_INCOMPAT_DIRDATA)
 #define EXT2_FEATURE_RO_COMPAT_SUPP	(EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
 					 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
 					 EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
@@ -1094,6 +1095,7 @@ struct ext2_dir_entry_tail {
 #define EXT2_FT_SYMLINK		7
 
 #define EXT2_FT_MAX		8
+#define EXT2_FT_MASK		0x0f
 
 /*
  * Annoyingly, e2fsprogs always swab16s ext2_dir_entry.name_len, so we
@@ -1103,6 +1105,9 @@ struct ext2_dir_entry_tail {
  */
 #define EXT2_DIR_NAME_LEN_CSUM	0xDE00
 
+int ext2_get_dirdata_field_size(struct ext2_dir_entry *de, char dirdata_flags);
+int ext2_get_dirdata_size(struct ext2_dir_entry *de);
+
 /*
  * EXT2_DIR_PAD defines the directory entries boundaries
  *
@@ -1112,7 +1117,13 @@ struct ext2_dir_entry_tail {
 #define EXT2_DIR_ENTRY_HASH_LEN		8
 #define EXT2_DIR_PAD			4
 #define EXT2_DIR_ROUND			(EXT2_DIR_PAD - 1)
-#define EXT2_DIR_REC_LEN(name_len) ext2fs_dir_rec_len(name_len, 0)
+#define EXT2_DIR_NAME_LEN(name_len)	(((name_len) + \
+					  EXT2_DIR_ENTRY_HEADER_LEN + \
+					  EXT2_DIR_ROUND) & \
+					 ~EXT2_DIR_ROUND)
+#define EXT2_DIR_REC_LEN(de)	(EXT2_DIR_NAME_LEN(((de)->name_len &         \
+						     EXT2_NAME_LEN) +         \
+						    ext2_get_dirdata_size(de)))
 
 static inline unsigned int ext2fs_dir_rec_len(__u8 name_len,
 						int extended)
@@ -1125,6 +1136,20 @@ static inline unsigned int ext2fs_dir_rec_len(__u8 name_len,
 	return rec_len;
 }
 
+static inline unsigned int ext2fs_dirdata_rec_len(struct ext2_dir_entry *de,
+						int extended)
+{
+	int rec_len = EXT2_DIR_REC_LEN(de);
+
+	if (extended)
+		rec_len += EXT2_DIR_ENTRY_HASH_LEN;
+	return rec_len;
+}
+
+/* lu_fid size and NUL char */
+#define EXT2_DIRENT_LUFID_SIZE		16
+#define EXT2_DIRENT_LUFID		0x10
+
 #define EXT4_ORPHAN_BLOCK_MAGIC 0x0b10ca04
 
 /* Structure at the tail of orphan block */
@@ -1205,4 +1230,6 @@ struct mmp_struct {
 
 #define EXT4_ENC_STRICT_MODE_FL			(1 << 0) /* Reject invalid sequences */
 
+#define EXT2_NEXT_DIRENT(d)	((void *)((char *)(d) + (d)->rec_len))
+
 #endif	/* _LINUX_EXT2_FS_H */
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 47de49b..1a7e00c 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -730,6 +730,7 @@ typedef struct ext2_icount *ext2_icount_t;
 					 EXT3_FEATURE_INCOMPAT_EXTENTS|\
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
 					 EXT4_FEATURE_INCOMPAT_EA_INODE|\
+					 EXT4_FEATURE_INCOMPAT_DIRDATA|\
 					 EXT4_LIB_INCOMPAT_MMP|\
 					 EXT4_FEATURE_INCOMPAT_64BIT|\
 					 EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
@@ -2260,6 +2261,25 @@ _INLINE_ int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks)
 						sizeof(struct ext2_dx_entry));
 }
 
+_INLINE_ struct ext2_dx_root_info *get_ext2_dx_root_info(ext2_filsys fs,
+							 char *buf)
+{
+	struct ext2_dir_entry *de = (struct ext2_dir_entry *)buf;
+
+	if (!(fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_DIRDATA))
+		return (struct ext2_dx_root_info *)(buf +
+						    EXT2_DIR_NAME_LEN(1) +
+						    EXT2_DIR_NAME_LEN(2));
+
+	/* get dotdot first */
+	de = (struct ext2_dir_entry *)((char *)de + de->rec_len);
+
+	/* dx root info is after dotdot entry */
+	de = (struct ext2_dir_entry *)((char *)de + EXT2_DIR_REC_LEN(de));
+
+	return (struct ext2_dx_root_info *)de;
+}
+
 /*
  * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
  */
@@ -2279,7 +2299,7 @@ _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
 
 _INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
 {
-	return entry->name_len & 0xff;
+	return entry->name_len & EXT2_NAME_LEN;
 }
 
 _INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len)
diff --git a/lib/ext2fs/inline_data.c b/lib/ext2fs/inline_data.c
index bd52e37..c8d2fa0 100644
--- a/lib/ext2fs/inline_data.c
+++ b/lib/ext2fs/inline_data.c
@@ -149,7 +149,7 @@ int ext2fs_inline_data_dir_iterate(ext2_filsys fs, ext2_ino_t ino,
 	/* we first check '.' and '..' dir */
 	dirent.inode = ino;
 	dirent.name_len = 1;
-	ext2fs_set_rec_len(fs, EXT2_DIR_REC_LEN(2), &dirent);
+	ext2fs_set_rec_len(fs, EXT2_DIR_NAME_LEN(2), &dirent);
 	dirent.name[0] = '.';
 	dirent.name[1] = '\0';
 	ctx->buf = (char *)&dirent;
@@ -160,7 +160,7 @@ int ext2fs_inline_data_dir_iterate(ext2_filsys fs, ext2_ino_t ino,
 
 	dirent.inode = ext2fs_le32_to_cpu(inode.i_block[0]);
 	dirent.name_len = 2;
-	ext2fs_set_rec_len(fs, EXT2_DIR_REC_LEN(3), &dirent);
+	ext2fs_set_rec_len(fs, EXT2_DIR_NAME_LEN(3), &dirent);
 	dirent.name[0] = '.';
 	dirent.name[1] = '.';
 	dirent.name[2] = '\0';
@@ -296,14 +296,14 @@ static errcode_t ext2fs_inline_data_convert_dir(ext2_filsys fs, ext2_ino_t ino,
 	ext2fs_dirent_set_name_len(dir, 1);
 	ext2fs_dirent_set_file_type(dir, filetype);
 	dir->name[0] = '.';
-	rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
-	dir->rec_len = EXT2_DIR_REC_LEN(1);
+	rec_len = (fs->blocksize - csum_size) - EXT2_DIR_NAME_LEN(1);
+	dir->rec_len = EXT2_DIR_NAME_LEN(1);
 
 	/*
 	 * Set up entry for '..'
 	 */
 	dir = (struct ext2_dir_entry *) (bbuf + dir->rec_len);
-	dir->rec_len = EXT2_DIR_REC_LEN(2);
+	dir->rec_len = EXT2_DIR_NAME_LEN(2);
 	dir->inode = ext2fs_le32_to_cpu(((__u32 *)ibuf)[0]);
 	ext2fs_dirent_set_name_len(dir, 2);
 	ext2fs_dirent_set_file_type(dir, filetype);
@@ -313,11 +313,11 @@ static errcode_t ext2fs_inline_data_convert_dir(ext2_filsys fs, ext2_ino_t ino,
 	/*
 	 * Adjust the last rec_len
 	 */
-	offset = EXT2_DIR_REC_LEN(1) + EXT2_DIR_REC_LEN(2);
+	offset = EXT2_DIR_NAME_LEN(1) + EXT2_DIR_NAME_LEN(2);
 	dir = (struct ext2_dir_entry *) (bbuf + offset);
 	memcpy(bbuf + offset, ibuf + EXT4_INLINE_DATA_DOTDOT_SIZE,
 	       size - EXT4_INLINE_DATA_DOTDOT_SIZE);
-	size += EXT2_DIR_REC_LEN(1) + EXT2_DIR_REC_LEN(2) -
+	size += EXT2_DIR_NAME_LEN(1) + EXT2_DIR_NAME_LEN(2) -
 		EXT4_INLINE_DATA_DOTDOT_SIZE;
 
 	do {
diff --git a/lib/ext2fs/lfsck.h b/lib/ext2fs/lfsck.h
new file mode 100644
index 0000000..6a49042
--- /dev/null
+++ b/lib/ext2fs/lfsck.h
@@ -0,0 +1,39 @@
+#ifndef LFSCK_H
+#define LFSCK_H
+
+/* This is unfortunately needed for older lustre_user.h to be usable */
+#define LASSERT(cond)		do { } while (0)
+
+#ifdef HAVE_LUSTRE_LUSTREAPI_H
+#include <lustre/lustreapi.h>
+#elif HAVE_LUSTRE_LIBLUSTREAPI_H
+#include <lustre/liblustreapi.h>
+#endif
+
+#ifndef DFID
+#define DFID "[%#llx:0x%x:0x%x]"
+#define PFID(fid) (unsigned long long)fid_seq(fid), fid_oid(fid), fid_ver(fid)
+struct lu_fid {
+	__u64   f_seq;
+	__u32   f_oid;
+	__u32   f_ver;
+};
+#endif /* !DFID */
+
+/* Unfortunately, neither the 1.8 or 2.x lustre_idl.h file is suitable
+ * for inclusion by userspace programs because of external dependencies.
+ * Define the minimum set of replacement functions here until that is fixed. */
+#ifndef HAVE_LUSTRE_LUSTRE_IDL_H
+#define fid_seq(fid) ((fid)->f_seq)
+#define fid_oid(fid) ((fid)->f_oid)
+#define fid_ver(fid) ((fid)->f_ver)
+
+static inline void fid_be_to_cpu(struct lu_fid *dst, struct lu_fid *src)
+{
+	dst->f_seq = ext2fs_be64_to_cpu(src->f_seq);
+	dst->f_oid = ext2fs_be32_to_cpu(src->f_oid);
+	dst->f_ver = ext2fs_be32_to_cpu(src->f_ver);
+}
+#endif
+
+#endif /* LFSCK_H */
diff --git a/lib/ext2fs/link.c b/lib/ext2fs/link.c
index d69b1e3..60d06fb 100644
--- a/lib/ext2fs/link.c
+++ b/lib/ext2fs/link.c
@@ -197,7 +197,7 @@ static int link_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
 	if (ls->done)
 		return DIRENT_ABORT;
 
-	rec_len = EXT2_DIR_REC_LEN(ls->namelen);
+	rec_len = EXT2_DIR_NAME_LEN(ls->namelen);
 
 	ls->err = ext2fs_get_rec_len(ls->fs, dirent, &curr_rec_len);
 	if (ls->err)
@@ -226,7 +226,7 @@ static int link_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
 	 * truncate it and return.
 	 */
 	if (dirent->inode) {
-		min_rec_len = EXT2_DIR_REC_LEN(ext2fs_dirent_name_len(dirent));
+		min_rec_len = EXT2_DIR_REC_LEN(dirent);
 		if (curr_rec_len < (min_rec_len + rec_len))
 			return ret;
 		rec_len = curr_rec_len - min_rec_len;
@@ -254,7 +254,7 @@ static int link_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
 	ext2fs_dirent_set_name_len(dirent, ls->namelen);
 	strncpy(dirent->name, ls->name, ls->namelen);
 	if (ext2fs_has_feature_filetype(ls->sb))
-		ext2fs_dirent_set_file_type(dirent, ls->flags & 0x7);
+		ext2fs_dirent_set_file_type(dirent, ls->flags & EXT2_FT_MASK);
 
 	ls->done++;
 	return DIRENT_ABORT|DIRENT_CHANGED;
@@ -330,8 +330,8 @@ static errcode_t dx_move_dirents(ext2_filsys fs, struct dx_hash_map *map,
 		csum_size = sizeof(struct ext2_dir_entry_tail);
 
 	for (i = 0; i < count; i++) {
-		de = (struct ext2_dir_entry *) ((char *)from + map[i].off);
-		rec_len = EXT2_DIR_REC_LEN(ext2fs_dirent_name_len(de));
+		de = from + map[i].off;
+		rec_len = EXT2_DIR_REC_LEN(de);
 		memcpy(to, de, rec_len);
 		retval = ext2fs_set_rec_len(fs, rec_len, to);
 		if (retval)
diff --git a/lib/ext2fs/newdir.c b/lib/ext2fs/newdir.c
index 7f47285..f168d66 100644
--- a/lib/ext2fs/newdir.c
+++ b/lib/ext2fs/newdir.c
@@ -64,8 +64,8 @@ errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
 		ext2fs_dirent_set_name_len(dir, 1);
 		ext2fs_dirent_set_file_type(dir, filetype);
 		dir->name[0] = '.';
-		rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
-		dir->rec_len = EXT2_DIR_REC_LEN(1);
+		rec_len = (fs->blocksize - csum_size) - EXT2_DIR_NAME_LEN(1);
+		dir->rec_len = EXT2_DIR_NAME_LEN(1);
 
 		/*
 		 * Set up entry for '..'
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 58ade9d..178b9a3 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1231,6 +1231,7 @@ static __u32 ok_features[3] = {
 		EXT4_FEATURE_INCOMPAT_FLEX_BG|
 		EXT4_FEATURE_INCOMPAT_EA_INODE|
 		EXT4_FEATURE_INCOMPAT_MMP |
+		EXT4_FEATURE_INCOMPAT_DIRDATA|
 		EXT4_FEATURE_INCOMPAT_64BIT|
 		EXT4_FEATURE_INCOMPAT_INLINE_DATA|
 		EXT4_FEATURE_INCOMPAT_ENCRYPT |
@@ -3168,6 +3169,19 @@ int main (int argc, char *argv[])
 		exit(1);
 	}
 
+	if (ext2fs_has_feature_dirdata(fs->super)) {
+		if (ext2fs_has_feature_inline_data(fs->super)) {
+			printf("%s", _("The dirdata feature can not enabled "
+				       "with inline data feature.\n"));
+			exit(1);
+		}
+		if (ext2fs_has_feature_casefold(fs->super)) {
+			printf("%s", _("The dirdata feature can not enabled "
+				       "with casefold feature.\n"));
+			exit(1);
+		}
+	}
+
 	/* Calculate journal blocks */
 	if (!journal_device && ((journal_size) ||
 	    ext2fs_has_feature_journal(&fs_param)))
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 6de40e9..330dc8d 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -192,6 +192,7 @@ static __u32 ok_features[3] = {
 		EXT4_FEATURE_INCOMPAT_FLEX_BG |
 		EXT4_FEATURE_INCOMPAT_EA_INODE|
 		EXT4_FEATURE_INCOMPAT_MMP |
+		EXT4_FEATURE_INCOMPAT_DIRDATA |
 		EXT4_FEATURE_INCOMPAT_64BIT |
 		EXT4_FEATURE_INCOMPAT_ENCRYPT |
 		EXT4_FEATURE_INCOMPAT_CSUM_SEED |
@@ -222,6 +223,7 @@ static __u32 clear_ok_features[3] = {
 	EXT2_FEATURE_INCOMPAT_FILETYPE |
 		EXT4_FEATURE_INCOMPAT_FLEX_BG |
 		EXT4_FEATURE_INCOMPAT_MMP |
+		EXT4_FEATURE_INCOMPAT_DIRDATA |
 		EXT4_FEATURE_INCOMPAT_64BIT |
 		EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 		EXT4_FEATURE_INCOMPAT_CASEFOLD,
@@ -1604,6 +1606,11 @@ mmp_error:
 	}
 
 	if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+		if (ext2fs_has_feature_dirdata(sb)) {
+			fputs(_("Can not enable casefold feature on "
+				"filesystem has dirdata.\n"), stderr);
+			return 1;
+		}
 		if (mount_flags & EXT2_MF_MOUNTED) {
 			fputs(_("The casefold feature may only be enabled when "
 				"the filesystem is unmounted.\n"), stderr);
@@ -1664,6 +1671,25 @@ mmp_error:
 		}
 	}
 
+	if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA)) {
+		if (ext2fs_has_feature_inline_data(sb)) {
+			fputs(_("Can not enable dirdata feature on "
+				"filesystem has inline_data.\n"), stderr);
+			return 1;
+		}
+		if (ext2fs_has_feature_casefold(sb)) {
+			fputs(_("Can not enable dirdata feature on "
+				"filesystem has casefold.\n"), stderr);
+			return 1;
+		}
+		if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
+			       EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+			fputs(_("Can not enable dirdata feature with"
+				"casefold feature.\n"), stderr);
+			return 1;
+		}
+	}
+
 	if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 	    (sb->s_feature_compat || sb->s_feature_ro_compat ||
 	     sb->s_feature_incompat))
diff --git a/tests/f_dir_optimize/expect.1 b/tests/f_dir_optimize/expect.1
new file mode 100644
index 0000000..4457fa7
--- /dev/null
+++ b/tests/f_dir_optimize/expect.1
@@ -0,0 +1,511 @@
+
+     94   40755 (18)      0      0    4096 25-Aug-2012 06:09 fid:[0x5e:0xf6d09ca7:0x0] ..
+    105   40755 (18)      0      0   36864 25-Aug-2012 06:09 fid:[0x200000400:0x1:0x0] .
+    106  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x2:0x0] file0
+    107  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x3:0x0] file1
+    108  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x4:0x0] file2
+    109  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x5:0x0] file3
+    110  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x6:0x0] file4
+    111  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x7:0x0] file5
+    112  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x8:0x0] file6
+    113  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x9:0x0] file7
+    114  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xa:0x0] file8
+    115  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xb:0x0] file9
+    116  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xc:0x0] file10
+    117  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xd:0x0] file11
+    118  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xe:0x0] file12
+    119  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0xf:0x0] file13
+    120  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x10:0x0] file14
+    121  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x11:0x0] file15
+    122  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x12:0x0] file16
+    123  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x13:0x0] file17
+    124  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x14:0x0] file18
+    125  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x15:0x0] file19
+    126  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x16:0x0] file20
+    127  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x17:0x0] file21
+    128  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x18:0x0] file22
+    129  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x19:0x0] file23
+    130  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1a:0x0] file24
+    131  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1b:0x0] file25
+    132  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1c:0x0] file26
+    133  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1d:0x0] file27
+    134  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1e:0x0] file28
+    135  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1f:0x0] file29
+    136  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x20:0x0] file30
+    137  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x21:0x0] file31
+    138  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x22:0x0] file32
+    139  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x23:0x0] file33
+    140  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x24:0x0] file34
+    141  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x25:0x0] file35
+    142  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x26:0x0] file36
+    143  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x27:0x0] file37
+    144  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x28:0x0] file38
+    145  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x29:0x0] file39
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+    164  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x3c:0x0] file58
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+    178  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x4a:0x0] file72
+    179  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x4b:0x0] file73
+    180  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x4c:0x0] file74
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+    188  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x54:0x0] file82
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+    214  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x6e:0x0] file108
+    215  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x6f:0x0] file109
+    216  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x70:0x0] file110
+    217  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x71:0x0] file111
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diff --git a/tests/f_dir_optimize/expect.2 b/tests/f_dir_optimize/expect.2
new file mode 100644
index 0000000..3649a36
--- /dev/null
+++ b/tests/f_dir_optimize/expect.2
@@ -0,0 +1,511 @@
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+    612  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1fc:0x0] file506
+    613  100644 (17)      0      0       0 25-Aug-2012 06:09 fid:[0x200000400:0x1fd:0x0] file507
diff --git a/tests/f_dir_optimize/image.gz b/tests/f_dir_optimize/image.gz
new file mode 100644
index 0000000..d457d3b
Binary files /dev/null and b/tests/f_dir_optimize/image.gz differ
diff --git a/tests/f_dir_optimize/name b/tests/f_dir_optimize/name
new file mode 100644
index 0000000..8a059bf
--- /dev/null
+++ b/tests/f_dir_optimize/name
@@ -0,0 +1 @@
+optimize directories
diff --git a/tests/f_dir_optimize/script b/tests/f_dir_optimize/script
new file mode 100644
index 0000000..f535e7b
--- /dev/null
+++ b/tests/f_dir_optimize/script
@@ -0,0 +1,36 @@
+FSCK_OPT="-fvyD"
+
+IMAGE=$test_dir/image.gz
+gunzip < $IMAGE > $TMPFILE
+
+$DEBUGFS -R 'ls -lD /ROOT/testdir' $TMPFILE 2>&1 | tail -n +2 |	\
+	sort > $test_name.1.log
+
+cmp -s $test_dir/expect.1 $test_name.1.log
+status1=$?
+
+$FSCK $FSCK_OPT -N test_filesys $TMPFILE > /dev/null 2>&1
+
+$DEBUGFS -R 'ls -lD /ROOT/testdir' $TMPFILE 2>&1 | tail -n +2 |	\
+	sort > $test_name.2.log
+cmp -s $test_dir/expect.2 $test_name.2.log
+status2=$?
+
+if [ "$status1" -eq 0 -a "$status2" -eq 0 ]; then
+	echo "$test_name: $test_description: ok"
+	touch $test_name.ok
+else
+	echo "$test_name: $test_description: failed"
+	[ $status1 -ne 0 ] &&
+		diff $DIFF_OPTS $test_dir/expect.1 $test_name.1.log	\
+			>> $test_name.failed
+	[ $status2 -ne 0 ] &&
+		diff $DIFF_OPTS $test_dir/expect.2 $test_name.2.log	\
+			>> $test_name.failed
+fi
+
+if [ "$SKIP_CLEANUP" != "true" ] ; then
+	unset IMAGE FSCK_OPT
+	unset SKIP_CLEANUP
+	unset DESCRIPTION SKIP_UNLINK
+fi
diff --git a/tests/f_dirdata_optimize/expect.1 b/tests/f_dirdata_optimize/expect.1
new file mode 100644
index 0000000..52368d3
--- /dev/null
+++ b/tests/f_dirdata_optimize/expect.1
@@ -0,0 +1,10 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 3A: Optimizing directories
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 102/4096 files (2.9% non-contiguous), 686/2048 blocks
+Exit status is 0
diff --git a/tests/f_dirdata_optimize/expect.2 b/tests/f_dirdata_optimize/expect.2
new file mode 100644
index 0000000..3cf9314
--- /dev/null
+++ b/tests/f_dirdata_optimize/expect.2
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 102/4096 files (2.9% non-contiguous), 686/2048 blocks
+Exit status is 0
diff --git a/tests/f_dirdata_optimize/image.gz b/tests/f_dirdata_optimize/image.gz
new file mode 100644
index 0000000..fcb7f4f
Binary files /dev/null and b/tests/f_dirdata_optimize/image.gz differ
diff --git a/tests/f_dirdata_optimize/name b/tests/f_dirdata_optimize/name
new file mode 100644
index 0000000..1649a37
--- /dev/null
+++ b/tests/f_dirdata_optimize/name
@@ -0,0 +1 @@
+optimize directories with dirdata
diff --git a/tests/f_dirdata_optimize/script b/tests/f_dirdata_optimize/script
new file mode 100644
index 0000000..52cf88e
--- /dev/null
+++ b/tests/f_dirdata_optimize/script
@@ -0,0 +1,3 @@
+FSCK_OPT="-Dyf"
+SECOND_FSCK_OPT="-yf"
+. $cmd_dir/run_e2fsck