[PATCH] ext4: 64bit metadata
In-kernel super block changes to support >32 bit free blocks numbers.
Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Alexandre Ratchov <alexandre.ratchov@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1d12e4f..b91dffd 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -62,6 +62,43 @@
static void ext4_write_super (struct super_block * sb);
static void ext4_write_super_lockfs(struct super_block *sb);
+
+ext4_fsblk_t ext4_block_bitmap(struct ext4_group_desc *bg)
+{
+ return le32_to_cpu(bg->bg_block_bitmap) |
+ ((ext4_fsblk_t)le16_to_cpu(bg->bg_block_bitmap_hi) << 32);
+}
+
+ext4_fsblk_t ext4_inode_bitmap(struct ext4_group_desc *bg)
+{
+ return le32_to_cpu(bg->bg_inode_bitmap) |
+ ((ext4_fsblk_t)le16_to_cpu(bg->bg_inode_bitmap_hi) << 32);
+}
+
+ext4_fsblk_t ext4_inode_table(struct ext4_group_desc *bg)
+{
+ return le32_to_cpu(bg->bg_inode_table) |
+ ((ext4_fsblk_t)le16_to_cpu(bg->bg_inode_table_hi) << 32);
+}
+
+void ext4_block_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk)
+{
+ bg->bg_block_bitmap = cpu_to_le32((u32)blk);
+ bg->bg_block_bitmap_hi = cpu_to_le16(blk >> 32);
+}
+
+void ext4_inode_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk)
+{
+ bg->bg_inode_bitmap = cpu_to_le32((u32)blk);
+ bg->bg_inode_bitmap_hi = cpu_to_le16(blk >> 32);
+}
+
+void ext4_inode_table_set(struct ext4_group_desc *bg, ext4_fsblk_t blk)
+{
+ bg->bg_inode_table = cpu_to_le32((u32)blk);
+ bg->bg_inode_table_hi = cpu_to_le16(blk >> 32);
+}
+
/*
* Wrappers for jbd2_journal_start/end.
*
@@ -1182,6 +1219,9 @@
struct ext4_sb_info *sbi = EXT4_SB(sb);
ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
ext4_fsblk_t last_block;
+ ext4_fsblk_t block_bitmap;
+ ext4_fsblk_t inode_bitmap;
+ ext4_fsblk_t inode_table;
struct ext4_group_desc * gdp = NULL;
int desc_block = 0;
int i;
@@ -1191,7 +1231,7 @@
for (i = 0; i < sbi->s_groups_count; i++)
{
if (i == sbi->s_groups_count - 1)
- last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
+ last_block = ext4_blocks_count(sbi->s_es) - 1;
else
last_block = first_block +
(EXT4_BLOCKS_PER_GROUP(sb) - 1);
@@ -1199,42 +1239,39 @@
if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0)
gdp = (struct ext4_group_desc *)
sbi->s_group_desc[desc_block++]->b_data;
- if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
- le32_to_cpu(gdp->bg_block_bitmap) > last_block)
+ block_bitmap = ext4_block_bitmap(gdp);
+ if (block_bitmap < first_block || block_bitmap > last_block)
{
ext4_error (sb, "ext4_check_descriptors",
"Block bitmap for group %d"
- " not in group (block %lu)!",
- i, (unsigned long)
- le32_to_cpu(gdp->bg_block_bitmap));
+ " not in group (block "E3FSBLK")!",
+ i, block_bitmap);
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
- le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
+ inode_bitmap = ext4_inode_bitmap(gdp);
+ if (inode_bitmap < first_block || inode_bitmap > last_block)
{
ext4_error (sb, "ext4_check_descriptors",
"Inode bitmap for group %d"
- " not in group (block %lu)!",
- i, (unsigned long)
- le32_to_cpu(gdp->bg_inode_bitmap));
+ " not in group (block "E3FSBLK")!",
+ i, inode_bitmap);
return 0;
}
- if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
- le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
- last_block)
+ inode_table = ext4_inode_table(gdp);
+ if (inode_table < first_block ||
+ inode_table + sbi->s_itb_per_group > last_block)
{
ext4_error (sb, "ext4_check_descriptors",
"Inode table for group %d"
- " not in group (block %lu)!",
- i, (unsigned long)
- le32_to_cpu(gdp->bg_inode_table));
+ " not in group (block "E3FSBLK")!",
+ i, inode_table);
return 0;
}
first_block += EXT4_BLOCKS_PER_GROUP(sb);
gdp++;
}
- sbi->s_es->s_free_blocks_count=cpu_to_le32(ext4_count_free_blocks(sb));
+ ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb));
sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb));
return 1;
}
@@ -1411,6 +1448,7 @@
int i;
int needs_recovery;
__le32 features;
+ __u64 blocks_count;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
@@ -1620,7 +1658,7 @@
goto failed_mount;
}
- if (le32_to_cpu(es->s_blocks_count) >
+ if (ext4_blocks_count(es) >
(sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
printk(KERN_ERR "EXT4-fs: filesystem on %s:"
" too large to mount safely\n", sb->s_id);
@@ -1632,9 +1670,11 @@
if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext4;
- sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
- le32_to_cpu(es->s_first_data_block) - 1)
- / EXT4_BLOCKS_PER_GROUP(sb)) + 1;
+ blocks_count = (ext4_blocks_count(es) -
+ le32_to_cpu(es->s_first_data_block) +
+ EXT4_BLOCKS_PER_GROUP(sb) - 1);
+ do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb));
+ sbi->s_groups_count = blocks_count;
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
EXT4_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
@@ -1949,7 +1989,7 @@
goto out_bdev;
}
- len = le32_to_cpu(es->s_blocks_count);
+ len = ext4_blocks_count(es);
start = sb_block + 1;
brelse(bh); /* we're done with the superblock */
@@ -2119,7 +2159,7 @@
if (!sbh)
return;
es->s_wtime = cpu_to_le32(get_seconds());
- es->s_free_blocks_count = cpu_to_le32(ext4_count_free_blocks(sb));
+ ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb));
BUFFER_TRACE(sbh, "marking dirty");
mark_buffer_dirty(sbh);
@@ -2312,7 +2352,7 @@
ext4_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 > ext4_blocks_count(es)) {
if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) {
err = -EROFS;
goto restore_opts;
@@ -2431,10 +2471,10 @@
buf->f_type = EXT4_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
+ buf->f_blocks = ext4_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 - ext4_r_blocks_count(es);
+ if (buf->f_bfree < ext4_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);