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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>
This commit is contained in:
Qu Wenruo 2015-09-28 16:57:53 +08:00 committed by Chris Mason
parent b9d0b38928
commit 81fb6f77a0
3 changed files with 130 additions and 2 deletions
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11
fs/btrfs/qgroup.c
View File

@ -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;

8
fs/btrfs/qgroup.h
View File

@ -33,6 +33,13 @@ struct btrfs_qgroup_extent_record {
struct ulist *old_roots;
};
/*
* For qgroup event trace points only
*/
#define QGROUP_RESERVE (1<<0)
#define QGROUP_RELEASE (1<<1)
#define QGROUP_FREE (1<<2)
int btrfs_quota_enable(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_quota_disable(struct btrfs_trans_handle *trans,
@ -81,6 +88,7 @@ static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
u64 ref_root, u64 num_bytes)
{
btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
trace_btrfs_qgroup_free_delayed_ref(ref_root, num_bytes);
}
void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);

113
include/trace/events/btrfs.h
View File

@ -1117,6 +1117,119 @@ DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy,
TP_ARGS(wq)
);
DECLARE_EVENT_CLASS(btrfs__qgroup_data_map,
TP_PROTO(struct inode *inode, u64 free_reserved),
TP_ARGS(inode, free_reserved),
TP_STRUCT__entry(
__field( u64, rootid )
__field( unsigned long, ino )
__field( u64, free_reserved )
),
TP_fast_assign(
__entry->rootid = BTRFS_I(inode)->root->objectid;
__entry->ino = inode->i_ino;
__entry->free_reserved = free_reserved;
),
TP_printk("rootid=%llu, ino=%lu, free_reserved=%llu",
__entry->rootid, __entry->ino, __entry->free_reserved)
);
DEFINE_EVENT(btrfs__qgroup_data_map, btrfs_qgroup_init_data_rsv_map,
TP_PROTO(struct inode *inode, u64 free_reserved),
TP_ARGS(inode, free_reserved)
);
DEFINE_EVENT(btrfs__qgroup_data_map, btrfs_qgroup_free_data_rsv_map,
TP_PROTO(struct inode *inode, u64 free_reserved),
TP_ARGS(inode, free_reserved)
);
#define BTRFS_QGROUP_OPERATIONS \
{ QGROUP_RESERVE, "reserve" }, \
{ QGROUP_RELEASE, "release" }, \
{ QGROUP_FREE, "free" }
DECLARE_EVENT_CLASS(btrfs__qgroup_rsv_data,
TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),
TP_ARGS(inode, start, len, reserved, op),
TP_STRUCT__entry(
__field( u64, rootid )
__field( unsigned long, ino )
__field( u64, start )
__field( u64, len )
__field( u64, reserved )
__field( int, op )
),
TP_fast_assign(
__entry->rootid = BTRFS_I(inode)->root->objectid;
__entry->ino = inode->i_ino;
__entry->start = start;
__entry->len = len;
__entry->reserved = reserved;
__entry->op = op;
),
TP_printk("root=%llu, ino=%lu, start=%llu, len=%llu, reserved=%llu, op=%s",
__entry->rootid, __entry->ino, __entry->start, __entry->len,
__entry->reserved,
__print_flags((unsigned long)__entry->op, "",
BTRFS_QGROUP_OPERATIONS)
)
);
DEFINE_EVENT(btrfs__qgroup_rsv_data, btrfs_qgroup_reserve_data,
TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),
TP_ARGS(inode, start, len, reserved, op)
);
DEFINE_EVENT(btrfs__qgroup_rsv_data, btrfs_qgroup_release_data,
TP_PROTO(struct inode *inode, u64 start, u64 len, u64 reserved, int op),
TP_ARGS(inode, start, len, reserved, op)
);
DECLARE_EVENT_CLASS(btrfs__qgroup_delayed_ref,
TP_PROTO(u64 ref_root, u64 reserved),
TP_ARGS(ref_root, reserved),
TP_STRUCT__entry(
__field( u64, ref_root )
__field( u64, reserved )
),
TP_fast_assign(
__entry->ref_root = ref_root;
__entry->reserved = reserved;
),
TP_printk("root=%llu, reserved=%llu, op=free",
__entry->ref_root, __entry->reserved)
);
DEFINE_EVENT(btrfs__qgroup_delayed_ref, btrfs_qgroup_free_delayed_ref,
TP_PROTO(u64 ref_root, u64 reserved),
TP_ARGS(ref_root, reserved)
);
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */