[RFC][Update][Patch 14/16] 48bit super block (metadata) changes

Mingming Cao
2006-06-30T00:20:49Z

In-kernel and on-disk super block changes to support >32 bit blocks numbers.

Signed-Off-By: Laurent Vivier <Laurent.Vivier@bull.net>

---

linux-2.6.17-ming/fs/ext3/balloc.c | 52 ++++++++++++------
linux-2.6.17-ming/fs/ext3/ialloc.c | 10 ++-
linux-2.6.17-ming/fs/ext3/inode.c | 9 ++-
linux-2.6.17-ming/fs/ext3/resize.c | 25 +++++----
linux-2.6.17-ming/fs/ext3/super.c | 50 ++++++++++--------
linux-2.6.17-ming/include/linux/ext3_fs.h | 83 +++++++++++++++++++++++++++++-
6 files changed, 169 insertions(+), 60 deletions(-)

diff -puN fs/ext3/balloc.c~64bit-metadata fs/ext3/balloc.c
--- linux-2.6.17/fs/ext3/balloc.c~64bit-metadata 2006-06-28 16:47:14.234938045 -0700
+++ linux-2.6.17-ming/fs/ext3/balloc.c 2006-06-28 16:47:14.257935406 -0700
@@ -88,12 +88,16 @@ read_block_bitmap(struct super_block *sb
desc = ext3_get_group_desc (sb, block_group, NULL);
if (!desc)
goto error_out;
- bh = sb_bread(sb, le32_to_cpu(desc->bg_block_bitmap));
+ bh = sb_bread(sb,
+ EXT3_BLOCK_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)));
if (!bh)
ext3_error (sb, "read_block_bitmap",
"Cannot read block bitmap - "
- "block_group = %d, block_bitmap = %u",
- block_group, le32_to_cpu(desc->bg_block_bitmap));
+ "block_group = %d, block_bitmap = "E3FSBLK,
+ block_group,
+ EXT3_BLOCK_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)));
error_out:
return bh;
}
@@ -328,7 +332,7 @@ void ext3_free_blocks_sb(handle_t *handl
es = sbi->s_es;
if (block < le32_to_cpu(es->s_first_data_block) ||
block + count < block ||
- block + count > le32_to_cpu(es->s_blocks_count)) {
+ block + count > EXT3_BLOCKS_COUNT(es)) {
ext3_error (sb, "ext3_free_blocks",
"Freeing blocks not in datazone - "
"block = "E3FSBLK", count = %lu", block, count);
@@ -356,11 +360,19 @@ do_more:
if (!desc)
goto error_return;

- if (in_range (le32_to_cpu(desc->bg_block_bitmap), block, count) ||
- in_range (le32_to_cpu(desc->bg_inode_bitmap), block, count) ||
- in_range (block, le32_to_cpu(desc->bg_inode_table),
+ if (in_range (EXT3_BLOCK_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)),
+ block, count) ||
+ in_range (EXT3_INODE_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)),
+ block, count) ||
+ in_range (block,
+ EXT3_INODE_TABLE(desc,
+ ext3_group_first_block_no(sb, block_group)),
sbi->s_itb_per_group) ||
- in_range (block + count - 1, le32_to_cpu(desc->bg_inode_table),
+ in_range (block + count - 1,
+ EXT3_INODE_TABLE(desc,
+ ext3_group_first_block_no(sb, block_group)),
sbi->s_itb_per_group))
ext3_error (sb, "ext3_free_blocks",
"Freeing blocks in system zones - "
@@ -1163,7 +1175,7 @@ static int ext3_has_free_blocks(struct e
ext3_fsblk_t free_blocks, root_blocks;

free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
- root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
+ root_blocks = EXT3_R_BLOCKS_COUNT(sbi->s_es);
if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
sbi->s_resuid != current->fsuid &&
(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
@@ -1262,7 +1274,7 @@ ext3_fsblk_t ext3_new_blocks(handle_t *h
* First, test whether the goal block is free.
*/
if (goal < le32_to_cpu(es->s_first_data_block) ||
- goal >= le32_to_cpu(es->s_blocks_count))
+ goal >= EXT3_BLOCKS_COUNT(es))
goal = le32_to_cpu(es->s_first_data_block);
ext3_get_group_no_and_offset(sb, goal, &group_no, &grp_target_blk);
gdp = ext3_get_group_desc(sb, group_no, &gdp_bh);
@@ -1361,11 +1373,15 @@ allocated:

ret_block = grp_alloc_blk + ext3_group_first_block_no(sb, group_no);

- if (in_range(le32_to_cpu(gdp->bg_block_bitmap), ret_block, num) ||
- in_range(le32_to_cpu(gdp->bg_inode_bitmap), ret_block, num) ||
- in_range(ret_block, le32_to_cpu(gdp->bg_inode_table),
+ if (in_range(EXT3_BLOCK_BITMAP(gdp, ext3_group_first_block_no(sb, group_no)),
+ ret_block, num) ||
+ in_range(EXT3_BLOCK_BITMAP(gdp, ext3_group_first_block_no(sb, group_no)),
+ ret_block, num) ||
+ in_range(ret_block, EXT3_INODE_TABLE(gdp,
+ ext3_group_first_block_no(sb, group_no)),
EXT3_SB(sb)->s_itb_per_group) ||
- in_range(ret_block + num - 1, le32_to_cpu(gdp->bg_inode_table),
+ in_range(ret_block + num - 1, EXT3_INODE_TABLE(gdp,
+ ext3_group_first_block_no(sb, group_no)),
EXT3_SB(sb)->s_itb_per_group))
ext3_error(sb, "ext3_new_block",
"Allocating block in system zone - "
@@ -1404,11 +1420,11 @@ allocated:
jbd_unlock_bh_state(bitmap_bh);
#endif

- if (ret_block + num - 1 >= le32_to_cpu(es->s_blocks_count)) {
+ if (ret_block + num - 1 >= EXT3_BLOCKS_COUNT(es)) {
ext3_error(sb, "ext3_new_block",
- "block("E3FSBLK") >= blocks count(%d) - "
+ "block("E3FSBLK") >= blocks count("E3FSBLK") - "
"block_group = %lu, es == %p ", ret_block,
- le32_to_cpu(es->s_blocks_count), group_no, es);
+ EXT3_BLOCKS_COUNT(es), group_no, es);
goto out;
}

@@ -1501,7 +1517,7 @@ ext3_fsblk_t ext3_count_free_blocks(stru
brelse(bitmap_bh);
printk("ext3_count_free_blocks: stored = "E3FSBLK
", computed = "E3FSBLK", "E3FSBLK"\n",
- le32_to_cpu(es->s_free_blocks_count),
+ EXT3_FREE_BLOCKS_COUNT(es),
desc_count, bitmap_count);
return bitmap_count;
#else
diff -puN fs/ext3/ialloc.c~64bit-metadata fs/ext3/ialloc.c
--- linux-2.6.17/fs/ext3/ialloc.c~64bit-metadata 2006-06-28 16:47:14.237937700 -0700
+++ linux-2.6.17-ming/fs/ext3/ialloc.c 2006-06-28 16:47:14.259935176 -0700
@@ -60,12 +60,14 @@ read_inode_bitmap(struct super_block * s
if (!desc)
goto error_out;

- bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
+ bh = sb_bread(sb, EXT3_INODE_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)));
if (!bh)
ext3_error(sb, "read_inode_bitmap",
"Cannot read inode bitmap - "
- "block_group = %lu, inode_bitmap = %u",
- block_group, le32_to_cpu(desc->bg_inode_bitmap));
+ "block_group = %lu, inode_bitmap = %llu",
+ block_group, EXT3_INODE_BITMAP(desc,
+ ext3_group_first_block_no(sb, block_group)));
error_out:
return bh;
}
@@ -304,7 +306,7 @@ static int find_group_orlov(struct super
goto fallback;
}

- blocks_per_dir = le32_to_cpu(es->s_blocks_count) - freeb;
+ blocks_per_dir = EXT3_BLOCKS_COUNT(es) - freeb;
sector_div(blocks_per_dir, ndirs);

max_dirs = ndirs / ngroups + inodes_per_group / 16;
diff -puN fs/ext3/inode.c~64bit-metadata fs/ext3/inode.c
--- linux-2.6.17/fs/ext3/inode.c~64bit-metadata 2006-06-28 16:47:14.241937242 -0700
+++ linux-2.6.17-ming/fs/ext3/inode.c 2006-06-28 16:47:14.263934718 -0700
@@ -2433,8 +2433,9 @@ static ext3_fsblk_t ext3_get_inode_block
*/
offset = ((ino - 1) % EXT3_INODES_PER_GROUP(sb)) *
EXT3_INODE_SIZE(sb);
- block = le32_to_cpu(gdp[desc].bg_inode_table) +
- (offset >> EXT3_BLOCK_SIZE_BITS(sb));
+ block = EXT3_INODE_TABLE((gdp+desc),
+ ext3_group_first_block_no(sb, block_group)) +
+ (offset >> EXT3_BLOCK_SIZE_BITS(sb));

iloc->block_group = block_group;
iloc->offset = offset & (EXT3_BLOCK_SIZE(sb) - 1);
@@ -2501,7 +2502,9 @@ static int __ext3_get_inode_loc(struct i
goto make_io;

bitmap_bh = sb_getblk(inode->i_sb,
- le32_to_cpu(desc->bg_inode_bitmap));
+ EXT3_INODE_BITMAP(desc,
+ ext3_group_first_block_no(inode->i_sb,
+ block_group)));
if (!bitmap_bh)
goto make_io;

diff -puN fs/ext3/resize.c~64bit-metadata fs/ext3/resize.c
--- linux-2.6.17/fs/ext3/resize.c~64bit-metadata 2006-06-28 16:47:14.245936783 -0700
+++ linux-2.6.17-ming/fs/ext3/resize.c 2006-06-28 16:47:14.266934373 -0700
@@ -27,7 +27,7 @@ static int verify_group_input(struct sup
{
struct ext3_sb_info *sbi = EXT3_SB(sb);
struct ext3_super_block *es = sbi->s_es;
- ext3_fsblk_t start = le32_to_cpu(es->s_blocks_count);
+ ext3_fsblk_t start = EXT3_BLOCKS_COUNT(es);
ext3_fsblk_t end = start + input->blocks_count;
unsigned group = input->group;
ext3_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
@@ -817,9 +817,12 @@ int ext3_group_add(struct super_block *s
/* Update group descriptor block for new group */
gdp = (struct ext3_group_desc *)primary->b_data + gdb_off;

- gdp->bg_block_bitmap = cpu_to_le32(input->block_bitmap);
- gdp->bg_inode_bitmap = cpu_to_le32(input->inode_bitmap);
- gdp->bg_inode_table = cpu_to_le32(input->inode_table);
+ EXT3_BLOCK_BITMAP_SET(gdp, ext3_group_first_block_no(sb, gdb_num),
+ input->block_bitmap); /* LV FIXME */
+ EXT3_INODE_BITMAP_SET(gdp, ext3_group_first_block_no(sb, gdb_num),
+ input->inode_bitmap); /* LV FIXME */
+ EXT3_INODE_TABLE_SET(gdp, ext3_group_first_block_no(sb, gdb_num),
+ input->inode_table); /* LV FIXME */
gdp->bg_free_blocks_count = cpu_to_le16(input->free_blocks_count);
gdp->bg_free_inodes_count = cpu_to_le16(EXT3_INODES_PER_GROUP(sb));

@@ -833,7 +836,7 @@ int ext3_group_add(struct super_block *s
* blocks/inodes before the group is live won't actually let us
* allocate the new space yet.
*/
- es->s_blocks_count = cpu_to_le32(le32_to_cpu(es->s_blocks_count) +
+ EXT3_BLOCKS_COUNT_SET(es, EXT3_BLOCKS_COUNT(es) +
input->blocks_count);
es->s_inodes_count = cpu_to_le32(le32_to_cpu(es->s_inodes_count) +
EXT3_INODES_PER_GROUP(sb));
@@ -869,7 +872,7 @@ int ext3_group_add(struct super_block *s

/* Update the reserved block counts only once the new group is
* active. */
- es->s_r_blocks_count = cpu_to_le32(le32_to_cpu(es->s_r_blocks_count) +
+ EXT3_R_BLOCKS_COUNT_SET(es, EXT3_R_BLOCKS_COUNT(es) +
input->reserved_blocks);

/* Update the free space counts */
@@ -920,7 +923,7 @@ int ext3_group_extend(struct super_block
/* We don't need to worry about locking wrt other resizers just
* yet: we're going to revalidate es->s_blocks_count after
* taking lock_super() below. */
- o_blocks_count = le32_to_cpu(es->s_blocks_count);
+ o_blocks_count = EXT3_BLOCKS_COUNT(es);
o_groups_count = EXT3_SB(sb)->s_groups_count;

if (test_opt(sb, DEBUG))
@@ -986,7 +989,7 @@ int ext3_group_extend(struct super_block
}

lock_super(sb);
- if (o_blocks_count != le32_to_cpu(es->s_blocks_count)) {
+ if (o_blocks_count != EXT3_BLOCKS_COUNT(es)) {
ext3_warning(sb, __FUNCTION__,
"multiple resizers run on filesystem!");
unlock_super(sb);
@@ -1002,7 +1005,7 @@ int ext3_group_extend(struct super_block
ext3_journal_stop(handle);
goto exit_put;
}
- es->s_blocks_count = cpu_to_le32(o_blocks_count + add);
+ EXT3_BLOCKS_COUNT_SET(es, o_blocks_count + add);
ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
sb->s_dirt = 1;
unlock_super(sb);
@@ -1014,8 +1017,8 @@ int ext3_group_extend(struct super_block
if ((err = ext3_journal_stop(handle)))
goto exit_put;
if (test_opt(sb, DEBUG))
- printk(KERN_DEBUG "EXT3-fs: extended group to %u blocks\n",
- le32_to_cpu(es->s_blocks_count));
+ printk(KERN_DEBUG "EXT3-fs: extended group to %llu blocks\n",
+ EXT3_BLOCKS_COUNT(es));
update_backups(sb, EXT3_SB(sb)->s_sbh->b_blocknr, (char *)es,
sizeof(struct ext3_super_block));
exit_put:
diff -puN fs/ext3/super.c~64bit-metadata fs/ext3/super.c
--- linux-2.6.17/fs/ext3/super.c~64bit-metadata 2006-06-28 16:47:14.248936438 -0700
+++ linux-2.6.17-ming/fs/ext3/super.c 2006-06-28 16:47:14.270933914 -0700
@@ -1151,44 +1151,48 @@ static int ext3_check_descriptors (struc
if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0)
gdp = (struct ext3_group_desc *)
sbi->s_group_desc[desc_block++]->b_data;
- if (le32_to_cpu(gdp->bg_block_bitmap) < block ||
- le32_to_cpu(gdp->bg_block_bitmap) >=
+ if (EXT3_BLOCK_BITMAP(gdp, ext3_group_first_block_no(sb, i)) <
+ block ||
+ EXT3_BLOCK_BITMAP(gdp, ext3_group_first_block_no(sb, i)) >=
block + EXT3_BLOCKS_PER_GROUP(sb))
{
ext3_error (sb, "ext3_check_descriptors",
"Block bitmap for group %d"
" not in group (block %lu)!",
i, (unsigned long)
- le32_to_cpu(gdp->bg_block_bitmap));
+ EXT3_BLOCK_BITMAP(gdp, ext3_group_first_block_no(sb, i)));
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_bitmap) < block ||
- le32_to_cpu(gdp->bg_inode_bitmap) >=
+ if (EXT3_INODE_BITMAP(gdp, ext3_group_first_block_no(sb, i)) <
+ block ||
+ EXT3_INODE_BITMAP(gdp, ext3_group_first_block_no(sb, i)) >=
block + EXT3_BLOCKS_PER_GROUP(sb))
{
ext3_error (sb, "ext3_check_descriptors",
"Inode bitmap for group %d"
" not in group (block %lu)!",
i, (unsigned long)
- le32_to_cpu(gdp->bg_inode_bitmap));
+ EXT3_INODE_BITMAP(gdp, ext3_group_first_block_no(sb, i)));
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_table) < block ||
- le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >=
- block + EXT3_BLOCKS_PER_GROUP(sb))
+ if (EXT3_INODE_TABLE(gdp, ext3_group_first_block_no(sb, i)) <
+ block ||
+ EXT3_INODE_TABLE(gdp, ext3_group_first_block_no(sb, i)) +
+ sbi->s_itb_per_group >=
+ block + EXT3_BLOCKS_PER_GROUP(sb))
{
ext3_error (sb, "ext3_check_descriptors",
"Inode table for group %d"
" not in group (block %lu)!",
i, (unsigned long)
- le32_to_cpu(gdp->bg_inode_table));
+ EXT3_INODE_TABLE(gdp, ext3_group_first_block_no(sb, i)));
return 0;
}
block += EXT3_BLOCKS_PER_GROUP(sb);
gdp++;
}

- sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
+ EXT3_FREE_BLOCKS_COUNT_SET(sbi->s_es, ext3_count_free_blocks(sb));
sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
return 1;
}
@@ -1365,6 +1369,7 @@ static int ext3_fill_super (struct super
int i;
int needs_recovery;
__le32 features;
+ __u64 blocks_count;

sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
@@ -1575,7 +1580,7 @@ static int ext3_fill_super (struct super
goto failed_mount;
}

- if (le32_to_cpu(es->s_blocks_count) >
+ if (EXT3_BLOCKS_COUNT(es) >
(sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
printk(KERN_ERR "EXT3-fs: filesystem on %s:"
" too large to mount safely\n", sb->s_id);
@@ -1587,10 +1592,11 @@ static int ext3_fill_super (struct super

if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext3;
- sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) -
- le32_to_cpu(es->s_first_data_block) +
- EXT3_BLOCKS_PER_GROUP(sb) - 1) /
- EXT3_BLOCKS_PER_GROUP(sb);
+ blocks_count = (EXT3_BLOCKS_COUNT(es) -
+ le32_to_cpu(es->s_first_data_block) +
+ EXT3_BLOCKS_PER_GROUP(sb) - 1);
+ do_div(blocks_count, EXT3_BLOCKS_PER_GROUP(sb));
+ sbi->s_groups_count = blocks_count;
db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
EXT3_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
@@ -1904,7 +1910,7 @@ static journal_t *ext3_get_dev_journal(s
goto out_bdev;
}

- len = le32_to_cpu(es->s_blocks_count);
+ len = EXT3_BLOCKS_COUNT(es);
start = sb_block + 1;
brelse(bh); /* we're done with the superblock */

@@ -2074,7 +2080,7 @@ static void ext3_commit_super (struct su
if (!sbh)
return;
es->s_wtime = cpu_to_le32(get_seconds());
- es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
+ EXT3_FREE_BLOCKS_COUNT_SET(es, ext3_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
BUFFER_TRACE(sbh, "marking dirty");
mark_buffer_dirty(sbh);
@@ -2267,7 +2273,7 @@ static int ext3_remount (struct super_bl
ext3_init_journal_params(sb, sbi->s_journal);

if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
- n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
+ n_blocks_count > EXT3_BLOCKS_COUNT(es)) {
if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
err = -EROFS;
goto restore_opts;
@@ -2388,10 +2394,10 @@ static int ext3_statfs (struct dentry *

buf->f_type = EXT3_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
+ buf->f_blocks = EXT3_BLOCKS_COUNT(es) - overhead;
buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
- buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
- if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
+ buf->f_bavail = buf->f_bfree - EXT3_R_BLOCKS_COUNT(es);
+ if (buf->f_bfree < EXT3_R_BLOCKS_COUNT(es))
buf->f_bavail = 0;
buf->f_files = le32_to_cpu(es->s_inodes_count);
buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
diff -puN include/linux/ext3_fs.h~64bit-metadata include/linux/ext3_fs.h
--- linux-2.6.17/include/linux/ext3_fs.h~64bit-metadata 2006-06-28 16:47:14.252935980 -0700
+++ linux-2.6.17-ming/include/linux/ext3_fs.h 2006-06-28 16:47:14.273933570 -0700
@@ -136,6 +136,54 @@ struct ext3_group_desc
__le32 bg_reserved[3];
};

+static inline u32 EXT3_RELATIVE_ENCODE(ext3_fsblk_t group_base,
+ ext3_fsblk_t fs_block)
+{
+ s32 gdp_block;
+
+ if (fs_block < (1ULL<<32) && group_base < (1ULL<<32))
+ return fs_block;
+
+ gdp_block = (fs_block - group_base);
+ BUG_ON ((group_base + gdp_block) != fs_block);
+
+ return gdp_block;
+}
+
+static inline ext3_fsblk_t EXT3_RELATIVE_DECODE(ext3_fsblk_t group_base,
+ u32 gdp_block)
+{
+ if (group_base >= (1ULL<<32))
+ return group_base + (s32) gdp_block;
+
+ if ((s32) gdp_block >= 0 && gdp_block < group_base &&
+ group_base + gdp_block >= (1ULL<<32))
+ return group_base + gdp_block;
+
+ return gdp_block;
+}
+
+#define EXT3_BLOCK_BITMAP(bg, group_base) \
+ EXT3_RELATIVE_DECODE(group_base, le32_to_cpu((bg)->bg_block_bitmap))
+#define EXT3_INODE_BITMAP(bg, group_base) \
+ EXT3_RELATIVE_DECODE(group_base, le32_to_cpu((bg)->bg_inode_bitmap))
+#define EXT3_INODE_TABLE(bg, group_base) \
+ EXT3_RELATIVE_DECODE(group_base, le32_to_cpu((bg)->bg_inode_table))
+
+#define EXT3_BLOCK_BITMAP_SET(bg, group_base, value) \
+ do {(bg)->bg_block_bitmap = EXT3_RELATIVE_ENCODE(group_base, value);} while(0)
+#define EXT3_INODE_BITMAP_SET(bg, group_base, value) \
+ do {(bg)->bg_inode_bitmap = EXT3_RELATIVE_ENCODE(group_base, value);} while(0)
+#define EXT3_INODE_TABLE_SET(bg, group_base, value) \
+ do {(bg)->bg_inode_table = EXT3_RELATIVE_ENCODE(group_base, value);} while(0)
+
+#define EXT3_IS_USED_BLOCK_BITMAP(bg) \
+ ((bg)->bg_block_bitmap != 0)
+#define EXT3_IS_USED_INODE_BITMAP(bg) \
+ ((bg)->bg_inode_bitmap != 0)
+#define EXT3_IS_USED_INODE_TABLE(bg) \
+ ((bg)->bg_inode_table != 0)
+
/*
* Macro-instructions used to manage group descriptors
*/
@@ -483,9 +531,38 @@ struct ext3_super_block {
__u16 s_reserved_word_pad;
__le32 s_default_mount_opts;
__le32 s_first_meta_bg; /* First metablock block group */
- __u32 s_reserved[190]; /* Padding to the end of the block */
+ /* 64bit support valid if EXT3_FEATURE_COMPAT_64BIT */
+ __le32 s_blocks_count_hi; /* Blocks count */
+/*100*/ __le32 s_r_blocks_count_hi; /* Reserved blocks count */
+ __le32 s_free_blocks_count_hi; /* Free blocks count */
+ __u32 s_reserved[187]; /* Padding to the end of the block */
};

+
+#define EXT3_BLOCKS_COUNT(s) \
+ (ext3_fsblk_t)(((__u64)le32_to_cpu((s)->s_blocks_count_hi) << 32) | \
+ (__u64)le32_to_cpu((s)->s_blocks_count))
+#define EXT3_BLOCKS_COUNT_SET(s,v) do { \
+ (s)->s_blocks_count = cpu_to_le32((v)); \
+ (s)->s_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32); \
+} while (0)
+
+#define EXT3_R_BLOCKS_COUNT(s) \
+ (ext3_fsblk_t)(((__u64)le32_to_cpu((s)->s_r_blocks_count_hi) << 32) | \
+ (__u64)le32_to_cpu((s)->s_r_blocks_count))
+#define EXT3_R_BLOCKS_COUNT_SET(s,v) do { \
+ (s)->s_r_blocks_count = cpu_to_le32((v)); \
+ (s)->s_r_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32); \
+} while (0)
+
+#define EXT3_FREE_BLOCKS_COUNT(s) \
+ (ext3_fsblk_t)(((__u64)le32_to_cpu((s)->s_free_blocks_count_hi) << 32) | \
+ (__u64)le32_to_cpu((s)->s_free_blocks_count))
+#define EXT3_FREE_BLOCKS_COUNT_SET(s,v) do { \
+ (s)->s_free_blocks_count = cpu_to_le32((v)); \
+ (s)->s_free_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32); \
+} while (0)
+
#ifdef __KERNEL__
#include <linux/ext3_fs_i.h>
#include <linux/ext3_fs_sb.h>
@@ -559,6 +636,7 @@ static inline struct ext3_inode_info *EX
#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
+#define EXT3_FEATURE_RO_COMPAT_64BIT 0x0010

#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -574,7 +652,8 @@ static inline struct ext3_inode_info *EX
EXT3_FEATURE_INCOMPAT_EXTENTS)
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
- EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
+ EXT3_FEATURE_RO_COMPAT_BTREE_DIR| \
+ EXT3_FEATURE_RO_COMPAT_64BIT)

/*
* Default values for user and/or group using reserved blocks

_