btrfs: qgroup: Add trace point for qgroup reserved space
Introduce the following trace points: qgroup_update_reserve qgroup_meta_reserve These trace points are handy to trace qgroup reserve space related problems. Also export btrfs_qgroup structure, as now we directly pass btrfs_qgroup structure to trace points, so that structure needs to be exported. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo
David Sterba
parent
825ad4c964
commit
3159fe7bae
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@ -47,50 +47,6 @@
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* - check all ioctl parameters
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*/
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/*
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* one struct for each qgroup, organized in fs_info->qgroup_tree.
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*/
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struct btrfs_qgroup {
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u64 qgroupid;
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/*
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* state
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*/
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u64 rfer; /* referenced */
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u64 rfer_cmpr; /* referenced compressed */
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u64 excl; /* exclusive */
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u64 excl_cmpr; /* exclusive compressed */
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/*
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* limits
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*/
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u64 lim_flags; /* which limits are set */
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u64 max_rfer;
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u64 max_excl;
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u64 rsv_rfer;
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u64 rsv_excl;
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/*
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* reservation tracking
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*/
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u64 reserved;
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/*
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* lists
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*/
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struct list_head groups; /* groups this group is member of */
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struct list_head members; /* groups that are members of this group */
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struct list_head dirty; /* dirty groups */
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struct rb_node node; /* tree of qgroups */
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/*
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* temp variables for accounting operations
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* Refer to qgroup_shared_accounting() for details.
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*/
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u64 old_refcnt;
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u64 new_refcnt;
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};
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static void btrfs_qgroup_update_old_refcnt(struct btrfs_qgroup *qg, u64 seq,
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int mod)
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{
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@ -1075,6 +1031,7 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
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qgroup->excl += sign * num_bytes;
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qgroup->excl_cmpr += sign * num_bytes;
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if (sign > 0) {
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trace_qgroup_update_reserve(fs_info, qgroup, -(s64)num_bytes);
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if (WARN_ON(qgroup->reserved < num_bytes))
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report_reserved_underflow(fs_info, qgroup, num_bytes);
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else
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@ -1100,6 +1057,8 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
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WARN_ON(sign < 0 && qgroup->excl < num_bytes);
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qgroup->excl += sign * num_bytes;
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if (sign > 0) {
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trace_qgroup_update_reserve(fs_info, qgroup,
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-(s64)num_bytes);
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if (WARN_ON(qgroup->reserved < num_bytes))
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report_reserved_underflow(fs_info, qgroup,
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num_bytes);
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@ -2446,6 +2405,7 @@ static int qgroup_reserve(struct btrfs_root *root, u64 num_bytes, bool enforce)
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qg = unode_aux_to_qgroup(unode);
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trace_qgroup_update_reserve(fs_info, qg, num_bytes);
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qg->reserved += num_bytes;
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}
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@ -2491,6 +2451,7 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
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qg = unode_aux_to_qgroup(unode);
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trace_qgroup_update_reserve(fs_info, qg, -(s64)num_bytes);
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if (WARN_ON(qg->reserved < num_bytes))
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report_reserved_underflow(fs_info, qg, num_bytes);
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else
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@ -2955,6 +2916,7 @@ int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
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return 0;
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BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
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trace_qgroup_meta_reserve(root, (s64)num_bytes);
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ret = qgroup_reserve(root, num_bytes, enforce);
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if (ret < 0)
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return ret;
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@ -2974,6 +2936,7 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
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reserved = atomic64_xchg(&root->qgroup_meta_rsv, 0);
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if (reserved == 0)
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return;
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trace_qgroup_meta_reserve(root, -(s64)reserved);
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btrfs_qgroup_free_refroot(fs_info, root->objectid, reserved);
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}
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@ -2988,6 +2951,7 @@ void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
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BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
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WARN_ON(atomic64_read(&root->qgroup_meta_rsv) < num_bytes);
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atomic64_sub(num_bytes, &root->qgroup_meta_rsv);
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trace_qgroup_meta_reserve(root, -(s64)num_bytes);
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btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes);
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}
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@ -61,6 +61,50 @@ struct btrfs_qgroup_extent_record {
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struct ulist *old_roots;
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};
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/*
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* one struct for each qgroup, organized in fs_info->qgroup_tree.
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*/
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struct btrfs_qgroup {
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u64 qgroupid;
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/*
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* state
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*/
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u64 rfer; /* referenced */
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u64 rfer_cmpr; /* referenced compressed */
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u64 excl; /* exclusive */
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u64 excl_cmpr; /* exclusive compressed */
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/*
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* limits
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*/
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u64 lim_flags; /* which limits are set */
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u64 max_rfer;
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u64 max_excl;
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u64 rsv_rfer;
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u64 rsv_excl;
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/*
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* reservation tracking
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*/
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u64 reserved;
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/*
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* lists
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*/
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struct list_head groups; /* groups this group is member of */
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struct list_head members; /* groups that are members of this group */
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struct list_head dirty; /* dirty groups */
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struct rb_node node; /* tree of qgroups */
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/*
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* temp variables for accounting operations
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* Refer to qgroup_shared_accounting() for details.
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*/
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u64 old_refcnt;
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u64 new_refcnt;
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};
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/*
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* For qgroup event trace points only
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*/
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@ -25,6 +25,7 @@ struct extent_buffer;
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struct btrfs_work;
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struct __btrfs_workqueue;
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struct btrfs_qgroup_extent_record;
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struct btrfs_qgroup;
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#define show_ref_type(type) \
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__print_symbolic(type, \
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@ -1614,6 +1615,49 @@ TRACE_EVENT(qgroup_update_counters,
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__entry->cur_new_count)
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);
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TRACE_EVENT(qgroup_update_reserve,
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TP_PROTO(struct btrfs_fs_info *fs_info, struct btrfs_qgroup *qgroup,
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s64 diff),
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TP_ARGS(fs_info, qgroup, diff),
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TP_STRUCT__entry_btrfs(
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__field( u64, qgid )
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__field( u64, cur_reserved )
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__field( s64, diff )
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),
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TP_fast_assign_btrfs(fs_info,
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__entry->qgid = qgroup->qgroupid;
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__entry->cur_reserved = qgroup->reserved;
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__entry->diff = diff;
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),
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TP_printk_btrfs("qgid=%llu cur_reserved=%llu diff=%lld",
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__entry->qgid, __entry->cur_reserved, __entry->diff)
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);
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TRACE_EVENT(qgroup_meta_reserve,
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TP_PROTO(struct btrfs_root *root, s64 diff),
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TP_ARGS(root, diff),
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TP_STRUCT__entry_btrfs(
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__field( u64, refroot )
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__field( s64, diff )
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),
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TP_fast_assign_btrfs(root->fs_info,
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__entry->refroot = root->objectid;
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__entry->diff = diff;
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),
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TP_printk_btrfs("refroot=%llu(%s) diff=%lld",
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show_root_type(__entry->refroot), __entry->diff)
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);
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#endif /* _TRACE_BTRFS_H */
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/* This part must be outside protection */
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