This patch introduces a new macro EXT2_DESC_PER_BLOCK to calculate the
number of group descriptors per block as two different structures are
defined.
Change from previous version:
use s_desc_size instead of sizeof(struct ext4_group_desc)
lib/ext2fs/closefs.c | 2 +-
lib/ext2fs/ext2_fs.h | 4 +++-
lib/ext2fs/initialize.c | 2 +-
lib/ext2fs/openfs.c | 4 ++--
misc/mke2fs.c | 5 ++---
resize/resize2fs.c | 7 +++----
6 files changed, 12 insertions(+), 12 deletions(-)
Index: e2fsprogs-1.39-tyt3-v7/misc/mke2fs.c
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/misc/mke2fs.c 2007-06-14 12:03:48.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/misc/mke2fs.c 2007-06-18 19:25:52.000000000 +0200
@@ -687,8 +687,7 @@ static void show_stats(ext2_filsys fs)
if (s->s_reserved_gdt_blocks)
printf(_("Maximum filesystem blocks=%lu\n"),
(s->s_reserved_gdt_blocks + fs->desc_blocks) *
- (fs->blocksize / sizeof(struct ext2_group_desc)) *
- s->s_blocks_per_group);
+ EXT2_DESC_PER_BLOCK(s) * s->s_blocks_per_group);
if (fs->group_desc_count > 1)
printf(_("%u block groups\n"), fs->group_desc_count);
else
@@ -820,7 +819,7 @@ static void parse_extended_opts(struct e
bpg = param->s_blocks_per_group;
if (!bpg)
bpg = blocksize * 8;
- gdpb = blocksize / sizeof(struct ext2_group_desc);
+ gdpb = EXT2_DESC_PER_BLOCK(param);
group_desc_count =
ext2fs_div_ceil(param->s_blocks_count, bpg);
desc_blocks = (group_desc_count +
Index: e2fsprogs-1.39-tyt3-v7/lib/ext2fs/openfs.c
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/lib/ext2fs/openfs.c 2007-04-30 07:10:05.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/lib/ext2fs/openfs.c 2007-06-18 19:25:53.000000000 +0200
@@ -39,7 +39,7 @@ blk_t ext2fs_descriptor_block_loc(ext2_f
(i < fs->super->s_first_meta_bg))
return (group_block + i + 1);
- bg = (fs->blocksize / sizeof (struct ext2_group_desc)) * i;
+ bg = EXT2_DESC_PER_BLOCK(fs->super) * i;
if (ext2fs_bg_has_super(fs, bg))
has_super = 1;
ret_blk = (fs->super->s_first_data_block + has_super +
@@ -281,7 +281,7 @@ errcode_t ext2fs_open2(const char *name,
if (!group_block)
group_block = fs->super->s_first_data_block;
dest = (char *) fs->group_desc;
- groups_per_block = fs->blocksize / sizeof(struct ext2_group_desc);
+ groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
for (i=0 ; i < fs->desc_blocks; i++) {
blk = ext2fs_descriptor_block_loc(fs, group_block, i);
retval = io_channel_read_blk(fs->io, blk, 1, dest);
Index: e2fsprogs-1.39-tyt3-v7/lib/ext2fs/closefs.c
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/lib/ext2fs/closefs.c 2007-04-30 07:10:05.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/lib/ext2fs/closefs.c 2007-06-18 19:25:53.000000000 +0200
@@ -81,7 +81,7 @@ int ext2fs_super_and_bgd_loc(ext2_filsys
super_blk = group_block;
numblocks--;
}
- meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc));
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
meta_bg = group / meta_bg_size;
if (!(fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ||
Index: e2fsprogs-1.39-tyt3-v7/lib/ext2fs/ext2_fs.h
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/lib/ext2fs/ext2_fs.h 2007-06-14 12:03:48.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/lib/ext2fs/ext2_fs.h 2007-06-18 19:26:38.000000000 +0200
@@ -234,7 +234,9 @@ struct ext2_dx_countlimit {
#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
#else
-#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
+#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / \
+ ((EXT2_DESC_SIZE(s) >= EXT2_MIN_DESC_SIZE_64BIT) ? \
+ (s)->s_desc_size : sizeof(struct ext2_group_desc)))
#endif
/*
Index: e2fsprogs-1.39-tyt3-v7/lib/ext2fs/initialize.c
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/lib/ext2fs/initialize.c 2007-06-14 12:03:48.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/lib/ext2fs/initialize.c 2007-06-18 19:25:52.000000000 +0200
@@ -67,7 +67,7 @@ static unsigned int calc_reserved_gdt_bl
{
struct ext2_super_block *sb = fs->super;
unsigned long bpg = sb->s_blocks_per_group;
- unsigned int gdpb = fs->blocksize / sizeof(struct ext2_group_desc);
+ unsigned int gdpb = EXT2_DESC_PER_BLOCK(sb);
unsigned long max_blocks = 0xffffffff;
unsigned long rsv_groups;
unsigned int rsv_gdb;
Index: e2fsprogs-1.39-tyt3-v7/resize/resize2fs.c
===================================================================
--- e2fsprogs-1.39-tyt3-v7.orig/resize/resize2fs.c 2007-04-30 07:10:05.000000000 +0200
+++ e2fsprogs-1.39-tyt3-v7/resize/resize2fs.c 2007-06-18 19:25:53.000000000 +0200
@@ -382,8 +382,7 @@ retry:
ext2fs_mark_block_bitmap(fs->block_map, group_block);
adjblocks++;
}
- meta_bg_size = (fs->blocksize /
- sizeof (struct ext2_group_desc));
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
meta_bg = i / meta_bg_size;
if (!(fs->super->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_META_BG) ||
@@ -549,7 +548,7 @@ static errcode_t mark_table_blocks(ext2_
unsigned long meta_bg_size;
unsigned int old_desc_blocks;
- meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc));
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
old_desc_blocks = fs->super->s_first_meta_bg;
else
@@ -716,7 +715,7 @@ static errcode_t blocks_to_move(ext2_res
* If we're increasing the number of descriptor blocks, life
* gets interesting....
*/
- meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc));
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
for (i = 0; i < max_groups; i++) {
has_super = ext2fs_bg_has_super(fs, i);
if (has_super)
