btrfs: qgroup: Add new trace point for qgroup data reserve

Now each qgroup reserve for data will has its ftrace event for better
debugging.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 7d5339da01b8..879343c959d9 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2516,10 +2516,12 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len)
 
         changeset.bytes_changed = 0;
         changeset.range_changed = ulist_alloc(GFP_NOFS);
-
         ret = set_record_extent_bits(&BTRFS_I(inode)->io_tree, start,
                         start + len -1, EXTENT_QGROUP_RESERVED, GFP_NOFS,
                         &changeset);
+        trace_btrfs_qgroup_reserve_data(inode, start, len,
+                                        changeset.bytes_changed,
+                                        QGROUP_RESERVE);
         if (ret < 0)
                 goto cleanup;
         ret = qgroup_reserve(root, changeset.bytes_changed);
@@ -2544,6 +2546,7 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len,
                                        int free)
 {
         struct extent_changeset changeset;
+        int trace_op = QGROUP_RELEASE;
         int ret;
 
         changeset.bytes_changed = 0;
@@ -2557,8 +2560,12 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len,
         if (ret < 0)
                 goto out;
 
-        if (free)
+        if (free) {
                 qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed);
+                trace_op = QGROUP_FREE;
+        }
+        trace_btrfs_qgroup_release_data(inode, start, len,
+                                        changeset.bytes_changed, trace_op);
 out:
         ulist_free(changeset.range_changed);
         return ret;