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Btrfs: add tracepoint for adding block groups 

I'm writing a tool to visualize the enospc system inside btrfs, I need this
tracepoint in order to keep track of the block groups in the system.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2016-03-25 13:25:52 -04:00 committed by David Sterba
parent d555b6c380
commit c83f8effef
2 changed files with 42 additions and 0 deletions
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2
fs/btrfs/extent-tree.c
View File

@ -9994,6 +9994,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
goto error;
}
trace_btrfs_add_block_group(root->fs_info, cache, 0);
ret = update_space_info(info, cache->flags, found_key.offset,
btrfs_block_group_used(&cache->item),
cache->bytes_super, &space_info);
@ -10164,6 +10165,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
* Now that our block group has its ->space_info set and is inserted in
* the rbtree, update the space info's counters.
*/
trace_btrfs_add_block_group(root->fs_info, cache, 1);
ret = update_space_info(root->fs_info, cache->flags, size, bytes_used,
cache->bytes_super, &cache->space_info);
if (ret) {

40
include/trace/events/btrfs.h
View File

@ -440,6 +440,46 @@ TRACE_EVENT(btrfs_sync_fs,
TP_printk("wait = %d", __entry->wait)
);
TRACE_EVENT(btrfs_add_block_group,
TP_PROTO(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group, int create),
TP_ARGS(fs_info, block_group, create),
TP_STRUCT__entry(
__array( u8, fsid, BTRFS_UUID_SIZE )
__field( u64, offset )
__field( u64, size )
__field( u64, flags )
__field( u64, bytes_used )
__field( u64, bytes_super )
__field( int, create )
),
TP_fast_assign(
memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);
__entry->offset = block_group->key.objectid;
__entry->size = block_group->key.offset;
__entry->flags = block_group->flags;
__entry->bytes_used =
btrfs_block_group_used(&block_group->item);
__entry->bytes_super = block_group->bytes_super;
__entry->create = create;
),
TP_printk("%pU: block_group offset = %llu, size = %llu, "
"flags = %llu(%s), bytes_used = %llu, bytes_super = %llu, "
"create = %d", __entry->fsid,
(unsigned long long)__entry->offset,
(unsigned long long)__entry->size,
(unsigned long long)__entry->flags,
__print_flags((unsigned long)__entry->flags, "|",
BTRFS_GROUP_FLAGS),
(unsigned long long)__entry->bytes_used,
(unsigned long long)__entry->bytes_super, __entry->create)
);
#define show_ref_action(action) \
__print_symbolic(action, \
{ BTRFS_ADD_DELAYED_REF, "ADD_DELAYED_REF" }, \