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authorYan, Zheng <zheng.yan@oracle.com>2010-05-16 10:46:25 -0400
committerChris Mason <chris.mason@oracle.com>2010-05-25 10:34:50 -0400
commitf0486c68e4bd9a06a5904d3eeb3a0d73a83befb8 (patch)
tree509428ef400ef45e875a3c448b63b86cbea36aea /fs/btrfs/transaction.h
parent2ead6ae770d9f9dec9f4286bf0fd9001b4388c4b (diff)
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Btrfs: Introduce contexts for metadata reservation
Introducing metadata reseravtion contexts has two major advantages. First, it makes metadata reseravtion more traceable. Second, it can reclaim freed space and re-add them to the itself after transaction committed. Besides add btrfs_block_rsv structure and related helper functions, This patch contains following changes: Move code that decides if freed tree block should be pinned into btrfs_free_tree_block(). Make space accounting more accurate, mainly for handling read only block groups. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
-rw-r--r--fs/btrfs/transaction.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 93c7ccb33118..56e728d70e39 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -45,13 +45,13 @@ struct btrfs_transaction {
struct btrfs_trans_handle {
u64 transid;
+ u64 block_group;
+ u64 bytes_reserved;
unsigned long blocks_reserved;
unsigned long blocks_used;
- struct btrfs_transaction *transaction;
- u64 block_group;
- u64 alloc_exclude_start;
- u64 alloc_exclude_nr;
unsigned long delayed_ref_updates;
+ struct btrfs_transaction *transaction;
+ struct btrfs_block_rsv *block_rsv;
};
struct btrfs_pending_snapshot {
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