ext4: Introduce ext4_lblk_t
This patch adds a new data type ext4_lblk_t to represent
the logical file blocks.
This is the preparatory patch to support large files in ext4
The follow up patch with convert the ext4_inode i_blocks to
represent the number of blocks in file system block size. This
changes makes it possible to have a block number 2**32 -1 which
will result in overflow if the block number is represented by
signed long. This patch convert all the block number to type
ext4_lblk_t which is typedef to __u32
Also remove dead code ext4_ext_walk_space
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index d9a3a2f..fb673b1 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -51,7 +51,7 @@
static struct buffer_head *ext4_append(handle_t *handle,
struct inode *inode,
- u32 *block, int *err)
+ ext4_lblk_t *block, int *err)
{
struct buffer_head *bh;
@@ -144,8 +144,8 @@
u16 size;
};
-static inline unsigned dx_get_block (struct dx_entry *entry);
-static void dx_set_block (struct dx_entry *entry, unsigned value);
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry);
+static void dx_set_block(struct dx_entry *entry, ext4_lblk_t value);
static inline unsigned dx_get_hash (struct dx_entry *entry);
static void dx_set_hash (struct dx_entry *entry, unsigned value);
static unsigned dx_get_count (struct dx_entry *entries);
@@ -166,7 +166,8 @@
static struct ext4_dir_entry_2 *dx_move_dirents (char *from, char *to,
struct dx_map_entry *offsets, int count);
static struct ext4_dir_entry_2* dx_pack_dirents (char *base, int size);
-static void dx_insert_block (struct dx_frame *frame, u32 hash, u32 block);
+static void dx_insert_block(struct dx_frame *frame,
+ u32 hash, ext4_lblk_t block);
static int ext4_htree_next_block(struct inode *dir, __u32 hash,
struct dx_frame *frame,
struct dx_frame *frames,
@@ -181,12 +182,12 @@
* Mask them off for now.
*/
-static inline unsigned dx_get_block (struct dx_entry *entry)
+static inline ext4_lblk_t dx_get_block(struct dx_entry *entry)
{
return le32_to_cpu(entry->block) & 0x00ffffff;
}
-static inline void dx_set_block (struct dx_entry *entry, unsigned value)
+static inline void dx_set_block(struct dx_entry *entry, ext4_lblk_t value)
{
entry->block = cpu_to_le32(value);
}
@@ -243,8 +244,8 @@
int i, n = dx_get_count (entries);
printk("%s index ", label);
for (i = 0; i < n; i++) {
- printk("%x->%u ", i? dx_get_hash(entries + i) :
- 0, dx_get_block(entries + i));
+ printk("%x->%lu ", i? dx_get_hash(entries + i) :
+ 0, (unsigned long)dx_get_block(entries + i));
}
printk("\n");
}
@@ -297,7 +298,8 @@
printk("%i indexed blocks...\n", count);
for (i = 0; i < count; i++, entries++)
{
- u32 block = dx_get_block(entries), hash = i? dx_get_hash(entries): 0;
+ ext4_lblk_t block = dx_get_block(entries);
+ ext4_lblk_t hash = i ? dx_get_hash(entries): 0;
u32 range = i < count - 1? (dx_get_hash(entries + 1) - hash): ~hash;
struct stats stats;
printk("%s%3u:%03u hash %8x/%8x ",levels?"":" ", i, block, hash, range);
@@ -561,7 +563,7 @@
* into the tree. If there is an error it is returned in err.
*/
static int htree_dirblock_to_tree(struct file *dir_file,
- struct inode *dir, int block,
+ struct inode *dir, ext4_lblk_t block,
struct dx_hash_info *hinfo,
__u32 start_hash, __u32 start_minor_hash)
{
@@ -569,7 +571,8 @@
struct ext4_dir_entry_2 *de, *top;
int err, count = 0;
- dxtrace(printk("In htree dirblock_to_tree: block %d\n", block));
+ dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
+ (unsigned long)block));
if (!(bh = ext4_bread (NULL, dir, block, 0, &err)))
return err;
@@ -621,9 +624,9 @@
struct ext4_dir_entry_2 *de;
struct dx_frame frames[2], *frame;
struct inode *dir;
- int block, err;
+ ext4_lblk_t block;
int count = 0;
- int ret;
+ int ret, err;
__u32 hashval;
dxtrace(printk("In htree_fill_tree, start hash: %x:%x\n", start_hash,
@@ -753,7 +756,7 @@
} while(more);
}
-static void dx_insert_block(struct dx_frame *frame, u32 hash, u32 block)
+static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
{
struct dx_entry *entries = frame->entries;
struct dx_entry *old = frame->at, *new = old + 1;
@@ -848,13 +851,14 @@
struct super_block * sb;
struct buffer_head * bh_use[NAMEI_RA_SIZE];
struct buffer_head * bh, *ret = NULL;
- unsigned long start, block, b;
+ ext4_lblk_t start, block, b;
int ra_max = 0; /* Number of bh's in the readahead
buffer, bh_use[] */
int ra_ptr = 0; /* Current index into readahead
buffer */
int num = 0;
- int nblocks, i, err;
+ ext4_lblk_t nblocks;
+ int i, err;
struct inode *dir = dentry->d_parent->d_inode;
int namelen;
const u8 *name;
@@ -915,7 +919,8 @@
if (!buffer_uptodate(bh)) {
/* read error, skip block & hope for the best */
ext4_error(sb, __FUNCTION__, "reading directory #%lu "
- "offset %lu", dir->i_ino, block);
+ "offset %lu", dir->i_ino,
+ (unsigned long)block);
brelse(bh);
goto next;
}
@@ -962,7 +967,7 @@
struct dx_frame frames[2], *frame;
struct ext4_dir_entry_2 *de, *top;
struct buffer_head *bh;
- unsigned long block;
+ ext4_lblk_t block;
int retval;
int namelen = dentry->d_name.len;
const u8 *name = dentry->d_name.name;
@@ -1174,7 +1179,7 @@
unsigned blocksize = dir->i_sb->s_blocksize;
unsigned count, continued;
struct buffer_head *bh2;
- u32 newblock;
+ ext4_lblk_t newblock;
u32 hash2;
struct dx_map_entry *map;
char *data1 = (*bh)->b_data, *data2;
@@ -1221,8 +1226,9 @@
split = count - move;
hash2 = map[split].hash;
continued = hash2 == map[split - 1].hash;
- dxtrace(printk("Split block %i at %x, %i/%i\n",
- dx_get_block(frame->at), hash2, split, count-split));
+ dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
+ (unsigned long)dx_get_block(frame->at),
+ hash2, split, count-split));
/* Fancy dance to stay within two buffers */
de2 = dx_move_dirents(data1, data2, map + split, count - split);
@@ -1374,7 +1380,7 @@
int retval;
unsigned blocksize;
struct dx_hash_info hinfo;
- u32 block;
+ ext4_lblk_t block;
struct fake_dirent *fde;
blocksize = dir->i_sb->s_blocksize;
@@ -1455,7 +1461,7 @@
int retval;
int dx_fallback=0;
unsigned blocksize;
- u32 block, blocks;
+ ext4_lblk_t block, blocks;
sb = dir->i_sb;
blocksize = sb->s_blocksize;
@@ -1532,7 +1538,7 @@
dx_get_count(entries), dx_get_limit(entries)));
/* Need to split index? */
if (dx_get_count(entries) == dx_get_limit(entries)) {
- u32 newblock;
+ ext4_lblk_t newblock;
unsigned icount = dx_get_count(entries);
int levels = frame - frames;
struct dx_entry *entries2;