[PATCH] ext4: switch fsblk to sector_t
Redefine ext3 in-kernel filesystem block type (ext3_fsblk_t) from unsigned
long to sector_t, to allow kernel to handle >32 bit ext3 blocks.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index e9e9844..aa33ff2 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -147,7 +147,7 @@
rsv = list_entry(n, struct ext4_reserve_window_node, rsv_node);
if (verbose)
printk("reservation window 0x%p "
- "start: %lu, end: %lu\n",
+ "start: "E3FSBLK", end: "E3FSBLK"\n",
rsv, rsv->rsv_start, rsv->rsv_end);
if (rsv->rsv_start && rsv->rsv_start >= rsv->rsv_end) {
printk("Bad reservation %p (start >= end)\n",
@@ -443,10 +443,7 @@
do_more:
overflow = 0;
- block_group = (block - le32_to_cpu(es->s_first_data_block)) /
- EXT4_BLOCKS_PER_GROUP(sb);
- bit = (block - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
/*
* Check to see if we are freeing blocks across a group
* boundary.
@@ -1404,7 +1401,7 @@
{
struct buffer_head *bitmap_bh = NULL;
struct buffer_head *gdp_bh;
- int group_no;
+ unsigned long group_no;
int goal_group;
ext4_grpblk_t grp_target_blk; /* blockgroup relative goal block */
ext4_grpblk_t grp_alloc_blk; /* blockgroup-relative allocated block*/
@@ -1467,8 +1464,7 @@
if (goal < le32_to_cpu(es->s_first_data_block) ||
goal >= le32_to_cpu(es->s_blocks_count))
goal = le32_to_cpu(es->s_first_data_block);
- group_no = (goal - le32_to_cpu(es->s_first_data_block)) /
- EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_get_group_no_and_offset(sb, goal, &group_no, &grp_target_blk);
goal_group = group_no;
retry_alloc:
gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
@@ -1485,8 +1481,6 @@
my_rsv = NULL;
if (free_blocks > 0) {
- grp_target_blk = ((goal - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb));
bitmap_bh = read_block_bitmap(sb, group_no);
if (!bitmap_bh)
goto io_error;
@@ -1613,7 +1607,7 @@
if (ret_block + num - 1 >= le32_to_cpu(es->s_blocks_count)) {
ext4_error(sb, "ext4_new_block",
"block("E3FSBLK") >= blocks count(%d) - "
- "block_group = %d, es == %p ", ret_block,
+ "block_group = %lu, es == %p ", ret_block,
le32_to_cpu(es->s_blocks_count), group_no, es);
goto out;
}
@@ -1733,9 +1727,10 @@
static inline int
block_in_use(ext4_fsblk_t block, struct super_block *sb, unsigned char *map)
{
- return ext4_test_bit ((block -
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb), map);
+ ext4_grpblk_t offset;
+
+ ext4_get_group_no_and_offset(sb, block, NULL, &offset);
+ return ext4_test_bit (offset, map);
}
static inline int test_root(int a, int b)
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index e17a6c9..94e1bb4 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -23,7 +23,7 @@
#include <linux/buffer_head.h>
#include <linux/random.h>
#include <linux/bitops.h>
-
+#include <linux/blkdev.h>
#include <asm/byteorder.h>
#include "xattr.h"
@@ -274,7 +274,8 @@
freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
avefreei = freei / ngroups;
freeb = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
- avefreeb = freeb / ngroups;
+ avefreeb = freeb;
+ sector_div(avefreeb, ngroups);
ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);
if ((parent == sb->s_root->d_inode) ||
@@ -303,13 +304,15 @@
goto fallback;
}
- blocks_per_dir = (le32_to_cpu(es->s_blocks_count) - freeb) / ndirs;
+ blocks_per_dir = le32_to_cpu(es->s_blocks_count) - freeb;
+ sector_div(blocks_per_dir, ndirs);
max_dirs = ndirs / ngroups + inodes_per_group / 16;
min_inodes = avefreei - inodes_per_group / 4;
min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb) / 4;
- max_debt = EXT4_BLOCKS_PER_GROUP(sb) / max(blocks_per_dir, (ext4_fsblk_t)BLOCK_COST);
+ max_debt = EXT4_BLOCKS_PER_GROUP(sb);
+ sector_div(max_debt, max(blocks_per_dir, (ext4_fsblk_t)BLOCK_COST));
if (max_debt * INODE_COST > inodes_per_group)
max_debt = inodes_per_group / INODE_COST;
if (max_debt > 255)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 5b2828d..c60bfed 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -36,7 +36,7 @@
le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
ext4_fsblk_t metaend = start + overhead;
struct buffer_head *bh = NULL;
- ext4_grpblk_t free_blocks_count;
+ ext4_grpblk_t free_blocks_count, offset;
int err = -EINVAL;
input->free_blocks_count = free_blocks_count =
@@ -49,13 +49,13 @@
"no-super", input->group, input->blocks_count,
free_blocks_count, input->reserved_blocks);
+ ext4_get_group_no_and_offset(sb, start, NULL, &offset);
if (group != sbi->s_groups_count)
ext4_warning(sb, __FUNCTION__,
"Cannot add at group %u (only %lu groups)",
input->group, sbi->s_groups_count);
- else if ((start - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb))
- ext4_warning(sb, __FUNCTION__, "Last group not full");
+ else if (offset != 0)
+ ext4_warning(sb, __FUNCTION__, "Last group not full");
else if (input->reserved_blocks > input->blocks_count / 5)
ext4_warning(sb, __FUNCTION__, "Reserved blocks too high (%u)",
input->reserved_blocks);
@@ -945,7 +945,7 @@
if (n_blocks_count > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
printk(KERN_ERR "EXT4-fs: filesystem on %s:"
- " too large to resize to %lu blocks safely\n",
+ " too large to resize to "E3FSBLK" blocks safely\n",
sb->s_id, n_blocks_count);
if (sizeof(sector_t) < 8)
ext4_warning(sb, __FUNCTION__,
@@ -960,8 +960,7 @@
}
/* Handle the remaining blocks in the last group only. */
- last = (o_blocks_count - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_get_group_no_and_offset(sb, o_blocks_count, NULL, &last);
if (last == 0) {
ext4_warning(sb, __FUNCTION__,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 69f87525..1d12e4f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1433,8 +1433,8 @@
* block sizes. We need to calculate the offset from buffer start.
*/
if (blocksize != EXT4_MIN_BLOCK_SIZE) {
- logic_sb_block = (sb_block * EXT4_MIN_BLOCK_SIZE) / blocksize;
- offset = (sb_block * EXT4_MIN_BLOCK_SIZE) % blocksize;
+ logic_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
+ offset = sector_div(logic_sb_block, blocksize);
} else {
logic_sb_block = sb_block;
}
@@ -1539,8 +1539,8 @@
brelse (bh);
sb_set_blocksize(sb, blocksize);
- logic_sb_block = (sb_block * EXT4_MIN_BLOCK_SIZE) / blocksize;
- offset = (sb_block * EXT4_MIN_BLOCK_SIZE) % blocksize;
+ logic_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
+ offset = sector_div(logic_sb_block, blocksize);
bh = sb_bread(sb, logic_sb_block);
if (!bh) {
printk(KERN_ERR
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index b61181aad..e952c6d 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -17,6 +17,7 @@
#define _LINUX_EXT4_FS_H
#include <linux/types.h>
+#include <linux/blkdev.h>
#include <linux/magic.h>
/*
@@ -750,6 +751,27 @@
#define ERR_BAD_DX_DIR -75000
/*
+ * This function calculate the block group number and offset,
+ * given a block number
+ */
+
+static inline void ext4_get_group_no_and_offset(struct super_block * sb,
+ ext4_fsblk_t blocknr, unsigned long* blockgrpp,
+ ext4_grpblk_t *offsetp)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ ext4_grpblk_t offset;
+
+ blocknr = blocknr - le32_to_cpu(es->s_first_data_block);
+ offset = sector_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb));
+ if (offsetp)
+ *offsetp = offset;
+ if (blockgrpp)
+ *blockgrpp = blocknr;
+
+}
+
+/*
* Function prototypes
*/
@@ -762,6 +784,10 @@
# define NORET_AND noreturn,
/* balloc.c */
+extern unsigned int ext4_block_group(struct super_block *sb,
+ ext4_fsblk_t blocknr);
+extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
+ ext4_fsblk_t blocknr);
extern int ext4_bg_has_super(struct super_block *sb, int group);
extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group);
extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 40ce04a..b2ccd98 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -25,9 +25,13 @@
typedef int ext4_grpblk_t;
/* data type for filesystem-wide blocks number */
-typedef unsigned long ext4_fsblk_t;
+typedef sector_t ext4_fsblk_t;
+#if BITS_PER_LONG == 64
#define E3FSBLK "%lu"
+#else
+#define E3FSBLK "%llu"
+#endif
struct ext4_reserve_window {
ext4_fsblk_t _rsv_start; /* First byte reserved */
