[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: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 19 insertions, 17 deletions

diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index c77e180..c32f7b3 100644
--- a/fs/gfs2/dir.c
+++ b/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);