Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e29d1c...
Commit: e29d1cde63be0b5f1739416b5574a83c34bf8eeb
Parent: 8a266467b8c4841ca994d0fe59f39e584650e3df
Author: Eric Sandeen <sandeen@redhat.com>
AuthorDate: Sat Aug 2 21:21:02 2008 -0400
Committer: Theodore Ts'o <tytso@mit.edu>
CommitDate: Sat Aug 2 21:21:02 2008 -0400
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>
---
fs/ext4/balloc.c | 8 ++++----
fs/ext4/ialloc.c | 51 +++++++++++++++++++++++++++++----------------------
2 files changed, 33 insertions(+), 26 deletions(-)
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 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
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 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
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 @@ unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh,
* 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;
+ 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, bitmap_blk);
+ return NULL;
+ }
+ if (bh_uptodate_or_lock(bh))
+ return bh;
+
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));
+ ext4_init_inode_bitmap(sb, bh, block_group, desc);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ return bh;
}
- if (!bh)
- ext4_error(sb, "read_inode_bitmap",
+ 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, ext4_inode_bitmap(sb, desc));
-error_out:
+ block_group, bitmap_blk);
+ return NULL;
+ }
return bh;
}
@@ -200,7 +207,7 @@ void ext4_free_inode (handle_t *handle, struct inode * inode)
}
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 @@ got_group:
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 @@ struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
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 @@ unsigned long ext4_count_free_inodes (struct super_block * sb)
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;
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
