[GFS2] Change ondisk format (hopefully for the last time)

There were one or two fields in structures which didn't get changed
last time back to their gfs1 sizes and alignments. One or two constants
have also changed back to their original values which were missed the
first time.

Its possible that indirect pointer blocks might need to change. If
they don't we'll have to rewrite them all on upgrade due to a change
in the amount of padding that they use.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/dir.c

@@ -397,11 +397,11 @@ static int dirent_next(struct gfs2_inode *dip, struct buffer_head *bh,
 {
 	struct gfs2_dirent *tmp, *cur;
 	char *bh_end;
-	uint32_t cur_rec_len;
+	uint16_t cur_rec_len;
 
 	cur = *dent;
 	bh_end = bh->b_data + bh->b_size;
-	cur_rec_len = be32_to_cpu(cur->de_rec_len);
+	cur_rec_len = be16_to_cpu(cur->de_rec_len);
 
 	if ((char *)cur + cur_rec_len >= bh_end) {
 		if ((char *)cur + cur_rec_len > bh_end) {
@@ -413,7 +413,7 @@ static int dirent_next(struct gfs2_inode *dip, struct buffer_head *bh,
 
 	tmp = (struct gfs2_dirent *)((char *)cur + cur_rec_len);
 
-	if ((char *)tmp + be32_to_cpu(tmp->de_rec_len) > bh_end) {
+	if ((char *)tmp + be16_to_cpu(tmp->de_rec_len) > bh_end) {
 		gfs2_consist_inode(dip);
 		return -EIO;
 	}
@@ -440,7 +440,7 @@ static int dirent_next(struct gfs2_inode *dip, struct buffer_head *bh,
 static void dirent_del(struct gfs2_inode *dip, struct buffer_head *bh,
 		       struct gfs2_dirent *prev, struct gfs2_dirent *cur)
 {
-	uint32_t cur_rec_len, prev_rec_len;
+	uint16_t cur_rec_len, prev_rec_len;
 
 	if (!cur->de_inum.no_addr) {
 		gfs2_consist_inode(dip);
@@ -460,8 +460,8 @@ static void dirent_del(struct gfs2_inode *dip, struct buffer_head *bh,
 
 	/*  Combine this dentry with the previous one.  */
 
-	prev_rec_len = be32_to_cpu(prev->de_rec_len);
-	cur_rec_len = be32_to_cpu(cur->de_rec_len);
+	prev_rec_len = be16_to_cpu(prev->de_rec_len);
+	cur_rec_len = be16_to_cpu(cur->de_rec_len);
 
 	if ((char *)prev + prev_rec_len != (char *)cur)
 		gfs2_consist_inode(dip);
@@ -469,7 +469,7 @@ static void dirent_del(struct gfs2_inode *dip, struct buffer_head *bh,
 		gfs2_consist_inode(dip);
 
 	prev_rec_len += cur_rec_len;
-	prev->de_rec_len = cpu_to_be32(prev_rec_len);
+	prev->de_rec_len = cpu_to_be16(prev_rec_len);
 }
 
 /**
@@ -513,7 +513,7 @@ int gfs2_dirent_alloc(struct gfs2_inode *dip, struct buffer_head *bh,
 		gfs2_trans_add_bh(dip->i_gl, bh, 1);
 
 		dent->de_rec_len = bh->b_size - offset;
-		dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
+		dent->de_rec_len = cpu_to_be16(dent->de_rec_len);
 		dent->de_name_len = name_len;
 
 		*dent_out = dent;
@@ -521,9 +521,10 @@ int gfs2_dirent_alloc(struct gfs2_inode *dip, struct buffer_head *bh,
 	}
 
 	do {
-		uint32_t cur_rec_len, cur_name_len;
+		uint16_t cur_rec_len;
+		uint32_t cur_name_len;
 
-		cur_rec_len = be32_to_cpu(dent->de_rec_len);
+		cur_rec_len = be16_to_cpu(dent->de_rec_len);
 		cur_name_len = dent->de_name_len;
 
 		if ((!dent->de_inum.no_addr && cur_rec_len >= rec_len) ||
@@ -536,11 +537,11 @@ int gfs2_dirent_alloc(struct gfs2_inode *dip, struct buffer_head *bh,
 				memset(new, 0, sizeof(struct gfs2_dirent));
 
 				new->de_rec_len = cur_rec_len - GFS2_DIRENT_SIZE(cur_name_len);
-				new->de_rec_len = cpu_to_be32(new->de_rec_len);
+				new->de_rec_len = cpu_to_be16(new->de_rec_len);
 				new->de_name_len = name_len;
 
-				dent->de_rec_len = cur_rec_len - be32_to_cpu(new->de_rec_len);
-				dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
+				dent->de_rec_len = cur_rec_len - be16_to_cpu(new->de_rec_len);
+				dent->de_rec_len = cpu_to_be16(dent->de_rec_len);
 
 				*dent_out = new;
 				return 0;
@@ -589,9 +590,10 @@ static int dirent_fits(struct gfs2_inode *dip, struct buffer_head *bh,
 		return 1;
 
 	do {
-		uint32_t cur_rec_len, cur_name_len;
+		uint16_t cur_rec_len;
+		uint32_t cur_name_len;
 
-		cur_rec_len = be32_to_cpu(dent->de_rec_len);
+		cur_rec_len = be16_to_cpu(dent->de_rec_len);
 		cur_name_len = dent->de_name_len;
 
 		if ((!dent->de_inum.no_addr && cur_rec_len >= rec_len) ||
@@ -832,10 +834,10 @@ static int dir_make_exhash(struct gfs2_inode *dip)
 	/*  Adjust the last dirent's record length
 	   (Remember that dent still points to the last entry.)  */
 
-	dent->de_rec_len = be32_to_cpu(dent->de_rec_len) +
+	dent->de_rec_len = be16_to_cpu(dent->de_rec_len) +
 		sizeof(struct gfs2_dinode) -
 		sizeof(struct gfs2_leaf);
-	dent->de_rec_len = cpu_to_be32(dent->de_rec_len);
+	dent->de_rec_len = cpu_to_be16(dent->de_rec_len);
 
 	brelse(bh);
 

include/linux/gfs2_ondisk.h

 /*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
+* Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+* Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
+*
+* This copyrighted material is made available to anyone wishing to use,
+* modify, copy, or redistribute it subject to the terms and conditions
+* of the GNU General Public License v.2.
+*/
 
 #ifndef __GFS2_ONDISK_DOT_H__
 #define __GFS2_ONDISK_DOT_H__
@@ -34,14 +34,14 @@
 #define GFS2_FORMAT_LH		800
 #define GFS2_FORMAT_LD		900
 #define GFS2_FORMAT_LB		1000
-#define GFS2_FORMAT_EA		1100
-#define GFS2_FORMAT_ED		1200
+#define GFS2_FORMAT_EA		1600
+#define GFS2_FORMAT_ED		1700
 #define GFS2_FORMAT_UT		1300
 #define GFS2_FORMAT_QC		1400
 /* These are format numbers for entities contained in files */
-#define GFS2_FORMAT_RI		1500
-#define GFS2_FORMAT_DE		1600
-#define GFS2_FORMAT_QU		1700
+#define GFS2_FORMAT_RI		1100
+#define GFS2_FORMAT_DE		1200
+#define GFS2_FORMAT_QU		1500
 /* These are part of the superblock */
 #define GFS2_FORMAT_FS		1801
 #define GFS2_FORMAT_MULTI	1900
@@ -74,9 +74,9 @@ struct gfs2_inum {
 #define GFS2_METATYPE_JD	7
 #define GFS2_METATYPE_LH	8
 #define GFS2_METATYPE_LD	9
-#define GFS2_METATYPE_LB	10
-#define GFS2_METATYPE_EA	11
-#define GFS2_METATYPE_ED	12
+#define GFS2_METATYPE_LB	12
+#define GFS2_METATYPE_EA	10
+#define GFS2_METATYPE_ED	11
 #define GFS2_METATYPE_UT	13
 #define GFS2_METATYPE_QC	14
 
@@ -181,6 +181,7 @@ struct gfs2_quota {
 	__be64 qu_limit;
 	__be64 qu_warn;
 	__be64 qu_value;
+	__u8 qu_reserved[64];
 };
 
 /*
@@ -260,11 +261,10 @@ struct gfs2_dinode {
 struct gfs2_dirent {
 	struct gfs2_inum de_inum;
 	__be32 de_hash;
-	__be32 de_rec_len;
-	__u8 de_name_len;
-	__u8 de_type;
-	__u16 __pad1;
-	__u32 __pad2;
+	__be16 de_rec_len;
+	__be16 de_name_len;
+	__be16 de_type;
+	__u8 __pad[14];
 };
 
 /*
@@ -279,7 +279,7 @@ struct gfs2_leaf {
 	__be32 lf_dirent_format;	/* Format of the dirents */
 	__be64 lf_next;			/* Next leaf, if overflow */
 
-	__u8 lf_reserved[32];
+	__u8 lf_reserved[64];
 };
 
 /*