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alistair23-linux
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Btrfs: add fsid to some tracepoints 

When tracing enospc problems on a box with multiple file systems mounted I need
to be able to differentiate between the two file systems.  Most of the important
trace points I'm looking at already have an fsid, but the reserved extent trace
points do not, so add that to make it possible to figure out which trace point
belongs to which file system.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.1
Josef Bacik 2016-03-25 13:25:57 -04:00 committed by David Sterba
parent f376df2b7d
commit dce3afa593
1 changed files with 11 additions and 6 deletions
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17
include/trace/events/btrfs.h
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@ -873,18 +873,21 @@ DECLARE_EVENT_CLASS(btrfs__reserved_extent,
TP_ARGS(root, start, len),
TP_STRUCT__entry(
__field( u64, root_objectid )
__field( u64, start )
__field( u64, len )
__array( u8, fsid, BTRFS_UUID_SIZE )
__field( u64, root_objectid )
__field( u64, start )
__field( u64, len )
),
TP_fast_assign(
memcpy(__entry->fsid, root->fs_info->fsid, BTRFS_UUID_SIZE);
__entry->root_objectid = root->root_key.objectid;
__entry->start = start;
__entry->len = len;
),
TP_printk("root = %llu(%s), start = %llu, len = %llu",
TP_printk("%pU: root = %llu(%s), start = %llu, len = %llu",
__entry->fsid,
show_root_type(__entry->root_objectid),
(unsigned long long)__entry->start,
(unsigned long long)__entry->len)
@ -941,6 +944,7 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
TP_ARGS(root, block_group, start, len),
TP_STRUCT__entry(
__array( u8, fsid, BTRFS_UUID_SIZE )
__field( u64, root_objectid )
__field( u64, bg_objectid )
__field( u64, flags )
@ -949,6 +953,7 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
),
TP_fast_assign(
memcpy(__entry->fsid, root->fs_info->fsid, BTRFS_UUID_SIZE);
__entry->root_objectid = root->root_key.objectid;
__entry->bg_objectid = block_group->key.objectid;
__entry->flags = block_group->flags;
@ -956,8 +961,8 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
__entry->len = len;
),
TP_printk("root = %Lu(%s), block_group = %Lu, flags = %Lu(%s), "
"start = %Lu, len = %Lu",
TP_printk("%pU: root = %Lu(%s), block_group = %Lu, flags = %Lu(%s), "
"start = %Lu, len = %Lu", __entry->fsid,
show_root_type(__entry->root_objectid), __entry->bg_objectid,
__entry->flags, __print_flags((unsigned long)__entry->flags,
"|", BTRFS_GROUP_FLAGS),