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Btrfs: add a type field for the transaction handle 

This patch add a type field into the transaction handle structure,
in this way, we needn't implement various end-transaction functions
and can make the code more simple and readable.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
This commit is contained in:
Miao Xie 2012-09-20 01:51:59 -06:00 committed by Chris Mason
parent e8830e606f
commit a698d0755a
3 changed files with 21 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
fs/btrfs/inode.c
View File

@ -1363,11 +1363,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
}
error:
if (nolock) {
err = btrfs_end_transaction_nolock(trans, root);
} else {
err = btrfs_end_transaction(trans, root);
}
err = btrfs_end_transaction(trans, root);
if (!ret)
ret = err;
@ -1957,12 +1953,8 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
out:
if (root != root->fs_info->tree_root)
btrfs_delalloc_release_metadata(inode, ordered_extent->len);
if (trans) {
if (nolock)
btrfs_end_transaction_nolock(trans, root);
else
btrfs_end_transaction(trans, root);
}
if (trans)
btrfs_end_transaction(trans, root);
if (ret)
clear_extent_uptodate(io_tree, ordered_extent->file_offset,
@ -4524,10 +4516,7 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
if (nolock)
ret = btrfs_end_transaction_nolock(trans, root);
else
ret = btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
}
return ret;
}

29
fs/btrfs/transaction.c
View File

@ -267,14 +267,6 @@ static void wait_current_trans(struct btrfs_root *root)
}
}
enum btrfs_trans_type {
TRANS_START,
TRANS_JOIN,
TRANS_USERSPACE,
TRANS_JOIN_NOLOCK,
TRANS_JOIN_FREEZE,
};
static int may_wait_transaction(struct btrfs_root *root, int type)
{
if (root->fs_info->log_root_recovering)
@ -388,6 +380,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
h->aborted = 0;
h->qgroup_reserved = qgroup_reserved;
h->delayed_ref_elem.seq = 0;
h->type = type;
INIT_LIST_HEAD(&h->qgroup_ref_list);
INIT_LIST_HEAD(&h->new_bgs);
@ -540,11 +533,12 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
}
static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int throttle, int lock)
struct btrfs_root *root, int throttle)
{
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_fs_info *info = root->fs_info;
int count = 0;
int lock = (trans->type != TRANS_JOIN_NOLOCK);
int err = 0;
if (--trans->use_count) {
@ -645,7 +639,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
{
int ret;
ret = __btrfs_end_transaction(trans, root, 0, 1);
ret = __btrfs_end_transaction(trans, root, 0);
if (ret)
return ret;
return 0;
@ -656,18 +650,7 @@ int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
{
int ret;
ret = __btrfs_end_transaction(trans, root, 1, 1);
if (ret)
return ret;
return 0;
}
int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
int ret;
ret = __btrfs_end_transaction(trans, root, 0, 0);
ret = __btrfs_end_transaction(trans, root, 1);
if (ret)
return ret;
return 0;
@ -676,7 +659,7 @@ int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
return __btrfs_end_transaction(trans, root, 1, 1);
return __btrfs_end_transaction(trans, root, 1);
}
/*

15
fs/btrfs/transaction.h
View File

@ -47,6 +47,14 @@ struct btrfs_transaction {
int aborted;
};
enum btrfs_trans_type {
TRANS_START,
TRANS_JOIN,
TRANS_USERSPACE,
TRANS_JOIN_NOLOCK,
TRANS_JOIN_FREEZE,
};
struct btrfs_trans_handle {
u64 transid;
u64 bytes_reserved;
@ -58,8 +66,9 @@ struct btrfs_trans_handle {
struct btrfs_transaction *transaction;
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *orig_rsv;
int aborted;
int adding_csums;
short aborted;
short adding_csums;
enum btrfs_trans_type type;
/*
* this root is only needed to validate that the root passed to
* start_transaction is the same as the one passed to end_transaction.
@ -94,8 +103,6 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
int btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items);
struct btrfs_trans_handle *btrfs_start_transaction_noflush(