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Date: Mon, 08 Dec 2008 16:23:28 +0800
From: Shen Feng <shen@...fujitsu.com>
To: "Theodore Ts'o" <tytso@....edu>
CC: Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH, RFC] ext4: remove ext4_new_blocks() and call ext4_mb_new_blocks()
directly
I think we can merge balloc.c and mballoc.c since ext4 now uses mballoc only.
on 12/08/2008 03:33 AM, Theodore Ts'o wrote:
> There was only one caller of the compatibility function
> ext4_new_blocks(), in balloc.c's ext4_alloc_blocks(). Change it to
> call ext4_mb_new_blocks() directly, and remove ext4_new_blocks()
> altogether. This cleans up the code, by removing two extra functions
> from the call chain, and hopefully saving some stack usage.
>
> Signed-off-by: "Theodore Ts'o" <tytso@....edu>
> ---
> fs/ext4/balloc.c | 20 --------------------
> fs/ext4/ext4.h | 3 ---
> fs/ext4/inode.c | 16 +++++++++++-----
> 3 files changed, 11 insertions(+), 28 deletions(-)
>
> diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
> index 9ce2fcd..02e8ce4 100644
> --- a/fs/ext4/balloc.c
> +++ b/fs/ext4/balloc.c
> @@ -741,26 +741,6 @@ ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
> return ext4_new_meta_blocks(handle, inode, goal, &count, errp);
> }
>
> -/*
> - * ext4_new_blocks() -- allocate data blocks
> - *
> - * @handle: handle to this transaction
> - * @inode: file inode
> - * @goal: given target block(filesystem wide)
> - * @count: total number of blocks need
> - * @errp: error code
> - *
> - * Return 1st allocated block numberon success, *count stores total account
> - * error stores in errp pointer
> - */
> -
> -ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
> - ext4_lblk_t iblock, ext4_fsblk_t goal,
> - unsigned long *count, int *errp)
> -{
> - return do_blk_alloc(handle, inode, iblock, goal, count, errp, 0);
> -}
> -
> /**
> * ext4_count_free_blocks() -- count filesystem free blocks
> * @sb: superblock
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 8370ffd..74cb395 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -1002,9 +1002,6 @@ extern ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
> ext4_fsblk_t goal, int *errp);
> extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
> ext4_fsblk_t goal, unsigned long *count, int *errp);
> -extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
> - ext4_lblk_t iblock, ext4_fsblk_t goal,
> - unsigned long *count, int *errp);
> extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
> extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
> extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 2a3804e..d972b4c 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -546,6 +546,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
> int indirect_blks, int blks,
> ext4_fsblk_t new_blocks[4], int *err)
> {
> + struct ext4_allocation_request ar;
> int target, i;
> unsigned long count = 0, blk_allocated = 0;
> int index = 0;
> @@ -594,10 +595,15 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
> if (!target)
> goto allocated;
> /* Now allocate data blocks */
> - count = target;
> - /* allocating blocks for data blocks */
> - current_block = ext4_new_blocks(handle, inode, iblock,
> - goal, &count, err);
> + memset(&ar, 0, sizeof(ar));
> + ar.inode = inode;
> + ar.goal = goal;
> + ar.len = target;
> + ar.logical = iblock;
> + ar.flags = EXT4_MB_HINT_DATA;
> +
> + current_block = ext4_mb_new_blocks(handle, &ar, err);
> +
> if (*err && (target == blks)) {
> /*
> * if the allocation failed and we didn't allocate
> @@ -613,7 +619,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
> */
> new_blocks[index] = current_block;
> }
> - blk_allocated += count;
> + blk_allocated += ar.len;
> }
> allocated:
> /* total number of blocks allocated for direct blocks */
--
Best Regards,
--------------------------------------------------
Shen Feng
Development Dept.I
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
8/F., Civil Defense Building, No.189 Guangzhou Road,
Nanjing, 210029, China
PHONE: +86-25-86630566-950
COINS: 79955-950
FAX: +86-25-83317685
MAIL: shen@...fujitsu.com
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