From: Qu Wenruo wqu@suse.com
commit 1b2442b4ae0f234daeadd90e153b466332c466d8 upstream.
[BUG] For btrfs:qgroup_meta_reserve event, the trace event can output garbage:
qgroup_meta_reserve: 9c7f6acc-b342-4037-bc47-7f6e4d2232d7: refroot=5(FS_TREE) type=DATA diff=2 qgroup_meta_reserve: 9c7f6acc-b342-4037-bc47-7f6e4d2232d7: refroot=5(FS_TREE) type=0x258792 diff=2
The @type can be completely garbage, as DATA type is not possible for trace_qgroup_meta_reserve() trace event.
[CAUSE] Ther are several problems related to qgroup trace events: - Unassigned entry member Member entry::type of trace_qgroup_update_reserve() and trace_qgourp_meta_reserve() is not assigned
- Redundant entry member Member entry::type is completely useless in trace_qgroup_meta_convert()
Fixes: 4ee0d8832c2e ("btrfs: qgroup: Update trace events for metadata reservation") CC: stable@vger.kernel.org # 4.10+ Reviewed-by: Nikolay Borisov nborisov@suse.com Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/trace/events/btrfs.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -1655,6 +1655,7 @@ TRACE_EVENT(qgroup_update_reserve, __entry->qgid = qgroup->qgroupid; __entry->cur_reserved = qgroup->rsv.values[type]; __entry->diff = diff; + __entry->type = type; ),
TP_printk_btrfs("qgid=%llu type=%s cur_reserved=%llu diff=%lld", @@ -1677,6 +1678,7 @@ TRACE_EVENT(qgroup_meta_reserve, TP_fast_assign_btrfs(root->fs_info, __entry->refroot = root->objectid; __entry->diff = diff; + __entry->type = type; ),
TP_printk_btrfs("refroot=%llu(%s) type=%s diff=%lld", @@ -1693,7 +1695,6 @@ TRACE_EVENT(qgroup_meta_convert, TP_STRUCT__entry_btrfs( __field( u64, refroot ) __field( s64, diff ) - __field( int, type ) ),
TP_fast_assign_btrfs(root->fs_info,