ext4: sync up block and inode bitmap reading functions
ext4_read_block_bitmap and read_inode_bitmap do essentially
the same thing, and yet they are structured quite differently.
I came across this difference while looking at doing bg locking
during bg initialization.
This patch:
* removes unnecessary casts in the error messages
* renames read_inode_bitmap to ext4_read_inode_bitmap
* and more substantially, restructures the inode bitmap
reading function to be more like the block bitmap counterpart.
The change to the inode bitmap reader simplifies the locking
to be applied in the next patch.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 495ab21..386cb79 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -314,8 +314,8 @@
if (unlikely(!bh)) {
ext4_error(sb, __func__,
"Cannot read block bitmap - "
- "block_group = %d, block_bitmap = %llu",
- (int)block_group, (unsigned long long)bitmap_blk);
+ "block_group = %lu, block_bitmap = %llu",
+ block_group, bitmap_blk);
return NULL;
}
if (bh_uptodate_or_lock(bh))
@@ -331,8 +331,8 @@
put_bh(bh);
ext4_error(sb, __func__,
"Cannot read block bitmap - "
- "block_group = %d, block_bitmap = %llu",
- (int)block_group, (unsigned long long)bitmap_blk);
+ "block_group = %lu, block_bitmap = %llu",
+ block_group, bitmap_blk);
return NULL;
}
ext4_valid_block_bitmap(sb, desc, block_group, bh);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index a92eb30..09cdcd5 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -97,34 +97,41 @@
* Return buffer_head of bitmap on success or NULL.
*/
static struct buffer_head *
-read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
+ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
{
struct ext4_group_desc *desc;
struct buffer_head *bh = NULL;
+ ext4_fsblk_t bitmap_blk;
desc = ext4_get_group_desc(sb, block_group, NULL);
if (!desc)
- goto error_out;
- if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
- bh = sb_getblk(sb, ext4_inode_bitmap(sb, desc));
- if (!buffer_uptodate(bh)) {
- lock_buffer(bh);
- if (!buffer_uptodate(bh)) {
- ext4_init_inode_bitmap(sb, bh, block_group,
- desc);
- set_buffer_uptodate(bh);
- }
- unlock_buffer(bh);
- }
- } else {
- bh = sb_bread(sb, ext4_inode_bitmap(sb, desc));
- }
- if (!bh)
- ext4_error(sb, "read_inode_bitmap",
+ return NULL;
+ bitmap_blk = ext4_inode_bitmap(sb, desc);
+ bh = sb_getblk(sb, bitmap_blk);
+ if (unlikely(!bh)) {
+ ext4_error(sb, __func__,
"Cannot read inode bitmap - "
"block_group = %lu, inode_bitmap = %llu",
- block_group, ext4_inode_bitmap(sb, desc));
-error_out:
+ block_group, bitmap_blk);
+ return NULL;
+ }
+ if (bh_uptodate_or_lock(bh))
+ return bh;
+
+ if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
+ ext4_init_inode_bitmap(sb, bh, block_group, desc);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ return bh;
+ }
+ if (bh_submit_read(bh) < 0) {
+ put_bh(bh);
+ ext4_error(sb, __func__,
+ "Cannot read inode bitmap - "
+ "block_group = %lu, inode_bitmap = %llu",
+ block_group, bitmap_blk);
+ return NULL;
+ }
return bh;
}
@@ -200,7 +207,7 @@
}
block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
- bitmap_bh = read_inode_bitmap(sb, block_group);
+ bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
if (!bitmap_bh)
goto error_return;
@@ -623,7 +630,7 @@
goto fail;
brelse(bitmap_bh);
- bitmap_bh = read_inode_bitmap(sb, group);
+ bitmap_bh = ext4_read_inode_bitmap(sb, group);
if (!bitmap_bh)
goto fail;
@@ -891,7 +898,7 @@
block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
- bitmap_bh = read_inode_bitmap(sb, block_group);
+ bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
if (!bitmap_bh) {
ext4_warning(sb, __func__,
"inode bitmap error for orphan %lu", ino);
@@ -969,7 +976,7 @@
continue;
desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
brelse(bitmap_bh);
- bitmap_bh = read_inode_bitmap(sb, i);
+ bitmap_bh = ext4_read_inode_bitmap(sb, i);
if (!bitmap_bh)
continue;