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authorQu Wenruo <quwenruo@cn.fujitsu.com>2017-03-13 15:52:08 +0800
committerDavid Sterba <dsterba@suse.com>2017-04-18 14:07:26 +0200
commit3159fe7baef3a50fc332455e252d8a01a18f1ff1 (patch)
treeca26143b362f515627de469a0422e4045a1a4232 /fs/btrfs
parent825ad4c96432a3908625dd1a79d6528e969e1a09 (diff)
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>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/qgroup.c52
-rw-r--r--fs/btrfs/qgroup.h44
2 files changed, 52 insertions, 44 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 1d7942c5a38a..27a229619808 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -47,50 +47,6 @@
* - check all ioctl parameters
*/
-/*
- * one struct for each qgroup, organized in fs_info->qgroup_tree.
- */
-struct btrfs_qgroup {
- u64 qgroupid;
-
- /*
- * state
- */
- u64 rfer; /* referenced */
- u64 rfer_cmpr; /* referenced compressed */
- u64 excl; /* exclusive */
- u64 excl_cmpr; /* exclusive compressed */
-
- /*
- * limits
- */
- u64 lim_flags; /* which limits are set */
- u64 max_rfer;
- u64 max_excl;
- u64 rsv_rfer;
- u64 rsv_excl;
-
- /*
- * reservation tracking
- */
- u64 reserved;
-
- /*
- * lists
- */
- struct list_head groups; /* groups this group is member of */
- struct list_head members; /* groups that are members of this group */
- struct list_head dirty; /* dirty groups */
- struct rb_node node; /* tree of qgroups */
-
- /*
- * temp variables for accounting operations
- * Refer to qgroup_shared_accounting() for details.
- */
- u64 old_refcnt;
- u64 new_refcnt;
-};
-
static void btrfs_qgroup_update_old_refcnt(struct btrfs_qgroup *qg, u64 seq,
int mod)
{
@@ -1075,6 +1031,7 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
qgroup->excl += sign * num_bytes;
qgroup->excl_cmpr += sign * num_bytes;
if (sign > 0) {
+ trace_qgroup_update_reserve(fs_info, qgroup, -(s64)num_bytes);
if (WARN_ON(qgroup->reserved < num_bytes))
report_reserved_underflow(fs_info, qgroup, num_bytes);
else
@@ -1100,6 +1057,8 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
WARN_ON(sign < 0 && qgroup->excl < num_bytes);
qgroup->excl += sign * num_bytes;
if (sign > 0) {
+ trace_qgroup_update_reserve(fs_info, qgroup,
+ -(s64)num_bytes);
if (WARN_ON(qgroup->reserved < num_bytes))
report_reserved_underflow(fs_info, qgroup,
num_bytes);
@@ -2446,6 +2405,7 @@ retry:
qg = unode_aux_to_qgroup(unode);
+ trace_qgroup_update_reserve(fs_info, qg, num_bytes);
qg->reserved += num_bytes;
}
@@ -2491,6 +2451,7 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
qg = unode_aux_to_qgroup(unode);
+ trace_qgroup_update_reserve(fs_info, qg, -(s64)num_bytes);
if (WARN_ON(qg->reserved < num_bytes))
report_reserved_underflow(fs_info, qg, num_bytes);
else
@@ -2955,6 +2916,7 @@ int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
return 0;
BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
+ trace_qgroup_meta_reserve(root, (s64)num_bytes);
ret = qgroup_reserve(root, num_bytes, enforce);
if (ret < 0)
return ret;
@@ -2974,6 +2936,7 @@ void btrfs_qgroup_free_meta_all(struct btrfs_root *root)
reserved = atomic64_xchg(&root->qgroup_meta_rsv, 0);
if (reserved == 0)
return;
+ trace_qgroup_meta_reserve(root, -(s64)reserved);
btrfs_qgroup_free_refroot(fs_info, root->objectid, reserved);
}
@@ -2988,6 +2951,7 @@ void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize));
WARN_ON(atomic64_read(&root->qgroup_meta_rsv) < num_bytes);
atomic64_sub(num_bytes, &root->qgroup_meta_rsv);
+ trace_qgroup_meta_reserve(root, -(s64)num_bytes);
btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes);
}
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h
index 96fc56ebf55a..31e468b16175 100644
--- a/fs/btrfs/qgroup.h
+++ b/fs/btrfs/qgroup.h
@@ -62,6 +62,50 @@ struct btrfs_qgroup_extent_record {
};
/*
+ * one struct for each qgroup, organized in fs_info->qgroup_tree.
+ */
+struct btrfs_qgroup {
+ u64 qgroupid;
+
+ /*
+ * state
+ */
+ u64 rfer; /* referenced */
+ u64 rfer_cmpr; /* referenced compressed */
+ u64 excl; /* exclusive */
+ u64 excl_cmpr; /* exclusive compressed */
+
+ /*
+ * limits
+ */
+ u64 lim_flags; /* which limits are set */
+ u64 max_rfer;
+ u64 max_excl;
+ u64 rsv_rfer;
+ u64 rsv_excl;
+
+ /*
+ * reservation tracking
+ */
+ u64 reserved;
+
+ /*
+ * lists
+ */
+ struct list_head groups; /* groups this group is member of */
+ struct list_head members; /* groups that are members of this group */
+ struct list_head dirty; /* dirty groups */
+ struct rb_node node; /* tree of qgroups */
+
+ /*
+ * temp variables for accounting operations
+ * Refer to qgroup_shared_accounting() for details.
+ */
+ u64 old_refcnt;
+ u64 new_refcnt;
+};
+
+/*
* For qgroup event trace points only
*/
#define QGROUP_RESERVE (1<<0)