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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>
This commit is contained in:
Mark Fasheh 2014-07-17 12:39:00 -07:00 committed by Chris Mason
parent 443f24fee7
commit d3982100ba
3 changed files with 61 additions and 0 deletions
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4
fs/btrfs/qgroup.c
View File

@ -1335,6 +1335,8 @@ int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
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 @@ static int btrfs_qgroup_account(struct btrfs_trans_handle *trans,
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:

1
fs/btrfs/super.c
View File

@ -60,6 +60,7 @@
#include "backref.h"
#include "tests/btrfs-tests.h"
#include "qgroup.h"
#define CREATE_TRACE_POINTS
#include <trace/events/btrfs.h>

56
include/trace/events/btrfs.h
View File

@ -23,6 +23,7 @@ struct map_lookup;
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 @@ DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy,
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 */