summaryrefslogtreecommitdiffstats
path: root/xlators/lib/src/libxlator.h
diff options
context:
space:
mode:
Diffstat (limited to 'xlators/lib/src/libxlator.h')
-rw-r--r--xlators/lib/src/libxlator.h83
1 files changed, 66 insertions, 17 deletions
diff --git a/xlators/lib/src/libxlator.h b/xlators/lib/src/libxlator.h
index c89629e..1d5e165 100644
--- a/xlators/lib/src/libxlator.h
+++ b/xlators/lib/src/libxlator.h
@@ -48,6 +48,69 @@ struct volume_mark {
uint32_t usec;
}__attribute__ ((__packed__));
+
+/*
+ * The enumerated type here
+ * is used to index two kind
+ * of integer arrays:
+ * - gauges
+ * - counters
+
+ * A counter is used internally,
+ * in getxattr callbacks, to count
+ * the results, categorized as
+ * the enum names suggest. So values
+ * in the counter are always non-negative.
+
+ * Gauges are part of the API.
+ * The caller passes one to the
+ * top-level aggregator function,
+ * cluster_getmarkerattr(). The gauge
+ * defines an evaluation policy for the
+ * counter. That is, at the
+ * end of the aggregation process
+ * the gauge is matched against the
+ * counter, and the policy
+ * represented by the gauge decides
+ * whether to return with success or failure,
+ * and in latter case, what particular failure
+ * case (errno).
+
+ * The rules are the following: for some index i,
+ * - if gauge[i] == 0, no requirement is set
+ * against counter[i];
+ * - if gauge[i] > 0, counter[i] >= gauge[i]
+ * is required;
+ * - if gauge[i] < 0, counter[i] < |gauge[i]|
+ * is required.
+
+ * If the requirement is not met, then i is mapped
+ * to the respective errno (MCNT_ENOENT -> ENOENT),
+ * or in lack of that, EINVAL.
+
+ * Cf. evaluate_marker_results() and marker_idx_errno_map[]
+ * in libxlator.c
+
+ * We provide two default gauges, one inteded for xtime
+ * aggregation, other for volume mark aggregation. The
+ * policies they represent agree with the hard-coded
+ * one prior to gauges. Cf. marker_xtime_default_gauge
+ * and marker_uuid_default_gauge in libxlator.c
+ */
+
+typedef enum {
+ MCNT_FOUND,
+ MCNT_NOTFOUND,
+ MCNT_ENODATA,
+ MCNT_ENOTCONN,
+ MCNT_ENOENT,
+ MCNT_EOTHER,
+ MCNT_MAX
+} marker_result_idx_t;
+
+extern int marker_xtime_default_gauge[];
+extern int marker_uuid_default_gauge[];
+
struct marker_str {
struct volume_mark *volmark;
data_t *data;
@@ -55,13 +118,8 @@ struct marker_str {
uint32_t host_timebuf[2];
uint32_t net_timebuf[2];
int32_t call_count;
- unsigned has_xtime:1;
- int32_t enoent_count;
- int32_t enotconn_count;
- int32_t enodata_count;
- int32_t noxtime_count;
-
- int esomerr;
+ int gauge[MCNT_MAX];
+ int count[MCNT_MAX];
xlator_specf_unwind_t xl_specf_unwind;
void *xl_local;
@@ -71,15 +129,6 @@ struct marker_str {
typedef struct marker_str xl_marker_local_t;
-static inline gf_boolean_t
-marker_has_volinfo (xl_marker_local_t *marker)
-{
- if (marker->volmark)
- return _gf_true;
- else
- return _gf_false;
-}
-
int32_t
cluster_markerxtime_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int op_ret, int op_errno, dict_t *dict, dict_t *xdata);
@@ -93,7 +142,7 @@ cluster_getmarkerattr (call_frame_t *frame,xlator_t *this, loc_t *loc,
const char *name, void *xl_local,
xlator_specf_unwind_t xl_specf_getxattr_unwind,
xlator_t **sub_volumes, int count, int type,
- char *vol_uuid);
+ int *gauge, char *vol_uuid);
int
match_uuid_local (const char *name, char *uuid);