btrfs: add trace for qgroup accounting
We want this to debug qgroup changes on live systems.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 2ce4ce7..1e4c6e9 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1335,6 +1335,8 @@
INIT_LIST_HEAD(&oper->elem.list);
oper->elem.seq = 0;
+ trace_btrfs_qgroup_record_ref(oper);
+
if (type == BTRFS_QGROUP_OPER_SUB_SUBTREE) {
/*
* If any operation for this bytenr/ref_root combo
@@ -2077,6 +2079,8 @@
ASSERT(is_fstree(oper->ref_root));
+ trace_btrfs_qgroup_account(oper);
+
switch (oper->type) {
case BTRFS_QGROUP_OPER_ADD_EXCL:
case BTRFS_QGROUP_OPER_SUB_EXCL:
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d66fbd5..3f1f4e2 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -60,6 +60,7 @@
#include "backref.h"
#include "tests/btrfs-tests.h"
+#include "qgroup.h"
#define CREATE_TRACE_POINTS
#include <trace/events/btrfs.h>
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 4ee4e30..b8774b3 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -23,6 +23,7 @@
struct extent_buffer;
struct btrfs_work;
struct __btrfs_workqueue;
+struct btrfs_qgroup_operation;
#define show_ref_type(type) \
__print_symbolic(type, \
@@ -1119,6 +1120,61 @@
TP_ARGS(wq)
);
+#define show_oper_type(type) \
+ __print_symbolic(type, \
+ { BTRFS_QGROUP_OPER_ADD_EXCL, "OPER_ADD_EXCL" }, \
+ { BTRFS_QGROUP_OPER_ADD_SHARED, "OPER_ADD_SHARED" }, \
+ { BTRFS_QGROUP_OPER_SUB_EXCL, "OPER_SUB_EXCL" }, \
+ { BTRFS_QGROUP_OPER_SUB_SHARED, "OPER_SUB_SHARED" })
+
+DECLARE_EVENT_CLASS(btrfs_qgroup_oper,
+
+ TP_PROTO(struct btrfs_qgroup_operation *oper),
+
+ TP_ARGS(oper),
+
+ TP_STRUCT__entry(
+ __field( u64, ref_root )
+ __field( u64, bytenr )
+ __field( u64, num_bytes )
+ __field( u64, seq )
+ __field( int, type )
+ __field( u64, elem_seq )
+ ),
+
+ TP_fast_assign(
+ __entry->ref_root = oper->ref_root;
+ __entry->bytenr = oper->bytenr,
+ __entry->num_bytes = oper->num_bytes;
+ __entry->seq = oper->seq;
+ __entry->type = oper->type;
+ __entry->elem_seq = oper->elem.seq;
+ ),
+
+ TP_printk("ref_root = %llu, bytenr = %llu, num_bytes = %llu, "
+ "seq = %llu, elem.seq = %llu, type = %s",
+ (unsigned long long)__entry->ref_root,
+ (unsigned long long)__entry->bytenr,
+ (unsigned long long)__entry->num_bytes,
+ (unsigned long long)__entry->seq,
+ (unsigned long long)__entry->elem_seq,
+ show_oper_type(__entry->type))
+);
+
+DEFINE_EVENT(btrfs_qgroup_oper, btrfs_qgroup_account,
+
+ TP_PROTO(struct btrfs_qgroup_operation *oper),
+
+ TP_ARGS(oper)
+);
+
+DEFINE_EVENT(btrfs_qgroup_oper, btrfs_qgroup_record_ref,
+
+ TP_PROTO(struct btrfs_qgroup_operation *oper),
+
+ TP_ARGS(oper)
+);
+
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */