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authorMiao Xie <miaox@cn.fujitsu.com>2012-09-20 01:51:59 -0600
committerChris Mason <chris.mason@fusionio.com>2012-10-09 09:15:38 -0400
commita698d0755adb6f27289d1e6610b2240595d27e8c (patch)
treebf54f9bcd6941a459be5aeaf22299547c693c0aa /fs/btrfs
parente8830e606ffee383f073e32313f11fc5692813fe (diff)
downloadlinux-a698d0755adb6f27289d1e6610b2240595d27e8c.tar.bz2
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>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/inode.c19
-rw-r--r--fs/btrfs/transaction.c29
-rw-r--r--fs/btrfs/transaction.h15
3 files changed, 21 insertions, 42 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 596305e4d75b..e355eb0aea1e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1363,11 +1363,7 @@ out_check:
}
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 @@ out_unlock:
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;
}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 35489644c247..d0a2b7e49381 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -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 @@ again:
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);
}
/*
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index fbf8313b9d67..0630bd19396a 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -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(