btrfs: qgroup: Update trace events for metadata reservation

Now trace_qgroup_meta_reserve() will have extra type parameter.

And introduce two new trace events:

1) trace_qgroup_meta_free_all_pertrans()
   For btrfs_qgroup_free_meta_all_pertrans()

2) trace_qgroup_meta_convert()
   For btrfs_qgroup_convert_reserved_meta()

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

2 files changed, 57 insertions, 5 deletions

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 836819c34c95..92e2c9f15951 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -3138,7 +3138,7 @@ int __btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
                 return 0;
 
         BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
-        trace_qgroup_meta_reserve(root, (s64)num_bytes);
+        trace_qgroup_meta_reserve(root, type, (s64)num_bytes);
         ret = qgroup_reserve(root, num_bytes, enforce, type);
         if (ret < 0)
                 return ret;
@@ -3163,7 +3163,7 @@ void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root)
                 return;
 
         /* TODO: Update trace point to handle such free */
-        trace_qgroup_meta_reserve(root, 0);
+        trace_qgroup_meta_free_all_pertrans(root);
         /* Special value -1 means to free all reserved space */
         btrfs_qgroup_free_refroot(fs_info, root->objectid, (u64)-1,
                                   BTRFS_QGROUP_RSV_META_PERTRANS);
@@ -3185,7 +3185,7 @@ void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
          */
         num_bytes = sub_root_meta_rsv(root, num_bytes, type);
         BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
-        trace_qgroup_meta_reserve(root, -(s64)num_bytes);
+        trace_qgroup_meta_reserve(root, type, -(s64)num_bytes);
         btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes, type);
 }
 
@@ -3245,6 +3245,7 @@ void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes)
         /* Same as btrfs_qgroup_free_meta_prealloc() */
         num_bytes = sub_root_meta_rsv(root, num_bytes,
                                       BTRFS_QGROUP_RSV_META_PREALLOC);
+        trace_qgroup_meta_convert(root, num_bytes);
         qgroup_convert_meta(fs_info, root->objectid, num_bytes);
 }
 
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index eee778ba1414..965c650a5273 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -1663,6 +1663,28 @@ TRACE_EVENT(qgroup_update_reserve,
 
 TRACE_EVENT(qgroup_meta_reserve,
 
+        TP_PROTO(struct btrfs_root *root, s64 diff, int type),
+
+        TP_ARGS(root, diff, type),
+
+        TP_STRUCT__entry_btrfs(
+                __field(        u64,    refroot                 )
+                __field(        s64,    diff                    )
+                __field(        int,    type                    )
+        ),
+
+        TP_fast_assign_btrfs(root->fs_info,
+                __entry->refroot        = root->objectid;
+                __entry->diff           = diff;
+        ),
+
+        TP_printk_btrfs("refroot=%llu(%s) type=%s diff=%lld",
+                show_root_type(__entry->refroot),
+                show_qgroup_rsv_type(__entry->type), __entry->diff)
+);
+
+TRACE_EVENT(qgroup_meta_convert,
+
         TP_PROTO(struct btrfs_root *root, s64 diff),
 
         TP_ARGS(root, diff),
@@ -1670,6 +1692,7 @@ TRACE_EVENT(qgroup_meta_reserve,
         TP_STRUCT__entry_btrfs(
                 __field(        u64,    refroot                 )
                 __field(        s64,    diff                    )
+                __field(        int,    type                    )
         ),
 
         TP_fast_assign_btrfs(root->fs_info,
@@ -1677,8 +1700,36 @@ TRACE_EVENT(qgroup_meta_reserve,
                 __entry->diff           = diff;
         ),
 
-        TP_printk_btrfs("refroot=%llu(%s) diff=%lld",
-                show_root_type(__entry->refroot), __entry->diff)
+        TP_printk_btrfs("refroot=%llu(%s) type=%s->%s diff=%lld",
+                show_root_type(__entry->refroot),
+                show_qgroup_rsv_type(BTRFS_QGROUP_RSV_META_PREALLOC),
+                show_qgroup_rsv_type(BTRFS_QGROUP_RSV_META_PERTRANS),
+                __entry->diff)
+);
+
+TRACE_EVENT(qgroup_meta_free_all_pertrans,
+
+        TP_PROTO(struct btrfs_root *root),
+
+        TP_ARGS(root),
+
+        TP_STRUCT__entry_btrfs(
+                __field(        u64,    refroot                 )
+                __field(        s64,    diff                    )
+                __field(        int,    type                    )
+        ),
+
+        TP_fast_assign_btrfs(root->fs_info,
+                __entry->refroot        = root->objectid;
+                spin_lock(&root->qgroup_meta_rsv_lock);
+                __entry->diff           = -(s64)root->qgroup_meta_rsv_pertrans;
+                spin_unlock(&root->qgroup_meta_rsv_lock);
+                __entry->type           = BTRFS_QGROUP_RSV_META_PERTRANS;
+        ),
+
+        TP_printk_btrfs("refroot=%llu(%s) type=%s diff=%lld",
+                show_root_type(__entry->refroot),
+                show_qgroup_rsv_type(__entry->type), __entry->diff)
 );
 
 DECLARE_EVENT_CLASS(btrfs__prelim_ref,