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| author | Qu Wenruo <wqu@suse.com> | 2019-10-17 05:38:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-29 11:20:07 +0300 |
| commit | 0b95aaae783fa422bc213337de29b710898ff8ec (patch) | |
| tree | 0f55003aa6fb7fd3cdd879c315f77374e67179e6 /include/trace | |
| parent | 1b921b5bc47f33bb99189a8141d31e49528571d5 (diff) | |
| download | linux-0b95aaae783fa422bc213337de29b710898ff8ec.tar.xz | |
btrfs: tracepoints: Fix bad entry members of qgroup events
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>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/btrfs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index b401c4e36394..eb3f668b8bce 100644 --- 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, |