1 /*-
2 * Copyright (c) 2014-2018 Netflix, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Author: Lawrence Stewart <lstewart@netflix.com>
29 */
30
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/arb.h>
34 #include <sys/ctype.h>
35 #include <sys/errno.h>
36 #include <sys/hash.h>
37 #include <sys/limits.h>
38 #include <sys/malloc.h>
39 #include <sys/qmath.h>
40 #include <sys/sbuf.h>
41 #if defined(DIAGNOSTIC)
42 #include <sys/tree.h>
43 #endif
44 #include <sys/stats.h> /* Must come after qmath.h and arb.h */
45 #include <sys/stddef.h>
46 #include <sys/stdint.h>
47 #include <sys/time.h>
48
49 #ifdef _KERNEL
50 #include <sys/kernel.h>
51 #include <sys/lock.h>
52 #include <sys/rwlock.h>
53 #include <sys/sysctl.h>
54 #include <sys/systm.h>
55 #else /* ! _KERNEL */
56 #include <pthread.h>
57 #include <stdbool.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #endif /* _KERNEL */
62
63 struct voistatdata_voistate {
64 /* Previous VOI value for diff calculation. */
65 struct voistatdata_numeric prev;
66 };
67
68 #define VS_VSDVALID 0x0001 /* Stat's voistatdata updated at least once. */
69 struct voistat {
70 int8_t stype; /* Type of stat e.g. VS_STYPE_SUM. */
71 enum vsd_dtype dtype : 8; /* Data type of this stat's data. */
72 uint16_t data_off; /* Blob offset for this stat's data. */
73 uint16_t dsz; /* Size of stat's data. */
74 #define VS_EBITS 8
75 uint16_t errs : VS_EBITS;/* Non-wrapping error count. */
76 uint16_t flags : 16 - VS_EBITS;
77 };
78 /* The voistat error count is capped to avoid wrapping. */
79 #define VS_INCERRS(vs) do { \
80 if ((vs)->errs < (1U << VS_EBITS) - 1) \
81 (vs)->errs++; \
82 } while (0)
83
84 /*
85 * Ideas for flags:
86 * - Global or entity specific (global would imply use of counter(9)?)
87 * - Whether to reset stats on read or not
88 * - Signal an overflow?
89 * - Compressed voistat array
90 */
91 #define VOI_REQSTATE 0x0001 /* VOI requires VS_STYPE_VOISTATE. */
92 struct voi {
93 int16_t id; /* VOI id. */
94 enum vsd_dtype dtype : 8; /* Data type of the VOI itself. */
95 int8_t voistatmaxid; /* Largest allocated voistat index. */
96 uint16_t stats_off; /* Blob offset for this VOIs stats. */
97 uint16_t flags;
98 };
99
100 /*
101 * Memory for the entire blob is allocated as a slab and then offsets are
102 * maintained to carve up the slab into sections holding different data types.
103 *
104 * Ideas for flags:
105 * - Compressed voi array (trade off memory usage vs search time)
106 * - Units of offsets (default bytes, flag for e.g. vm_page/KiB/Mib)
107 */
108 struct statsblobv1 {
109 uint8_t abi;
110 uint8_t endian;
111 uint16_t flags;
112 uint16_t maxsz;
113 uint16_t cursz;
114 /* Fields from here down are opaque to consumers. */
115 uint32_t tplhash; /* Base template hash ID. */
116 uint16_t stats_off; /* voistat array blob offset. */
117 uint16_t statsdata_off; /* voistatdata array blob offset. */
118 sbintime_t created; /* Blob creation time. */
119 sbintime_t lastrst; /* Time of last reset. */
120 struct voi vois[]; /* Array indexed by [voi_id]. */
121 } __aligned(sizeof(void *));
122 _Static_assert(offsetof(struct statsblobv1, cursz) +
123 SIZEOF_MEMBER(struct statsblobv1, cursz) ==
124 offsetof(struct statsblob, opaque),
125 "statsblobv1 ABI mismatch");
126
127 struct statsblobv1_tpl {
128 struct metablob *mb;
129 struct statsblobv1 *sb;
130 };
131
132 /* Context passed to iterator callbacks. */
133 struct sb_iter_ctx {
134 void *usrctx; /* Caller supplied context. */
135 uint32_t flags; /* Flags for current iteration. */
136 int16_t vslot; /* struct voi slot index. */
137 int8_t vsslot; /* struct voistat slot index. */
138 };
139
140 struct sb_tostrcb_ctx {
141 struct sbuf *buf;
142 struct statsblob_tpl *tpl;
143 enum sb_str_fmt fmt;
144 uint32_t flags;
145 };
146
147 struct sb_visitcb_ctx {
148 stats_blob_visitcb_t cb;
149 void *usrctx;
150 };
151
152 /* Stats blob iterator callback. */
153 typedef int (*stats_v1_blob_itercb_t)(struct statsblobv1 *sb, struct voi *v,
154 struct voistat *vs, struct sb_iter_ctx *ctx);
155
156 #ifdef _KERNEL
157 static struct rwlock tpllistlock;
158 RW_SYSINIT(stats_tpl_list, &tpllistlock, "Stat template list lock");
159 #define TPL_LIST_RLOCK() rw_rlock(&tpllistlock)
160 #define TPL_LIST_RUNLOCK() rw_runlock(&tpllistlock)
161 #define TPL_LIST_WLOCK() rw_wlock(&tpllistlock)
162 #define TPL_LIST_WUNLOCK() rw_wunlock(&tpllistlock)
163 #define TPL_LIST_LOCK_ASSERT() rw_assert(&tpllistlock, RA_LOCKED)
164 #define TPL_LIST_RLOCK_ASSERT() rw_assert(&tpllistlock, RA_RLOCKED)
165 #define TPL_LIST_WLOCK_ASSERT() rw_assert(&tpllistlock, RA_WLOCKED)
166 MALLOC_DEFINE(M_STATS, "stats(9) related memory", "stats(9) related memory");
167 #define stats_free(ptr) free((ptr), M_STATS)
168 #else /* ! _KERNEL */
169 static void stats_constructor(void);
170 static void stats_destructor(void);
171 static pthread_rwlock_t tpllistlock;
172 #define TPL_LIST_UNLOCK() pthread_rwlock_unlock(&tpllistlock)
173 #define TPL_LIST_RLOCK() pthread_rwlock_rdlock(&tpllistlock)
174 #define TPL_LIST_RUNLOCK() TPL_LIST_UNLOCK()
175 #define TPL_LIST_WLOCK() pthread_rwlock_wrlock(&tpllistlock)
176 #define TPL_LIST_WUNLOCK() TPL_LIST_UNLOCK()
177 #define TPL_LIST_LOCK_ASSERT() do { } while (0)
178 #define TPL_LIST_RLOCK_ASSERT() do { } while (0)
179 #define TPL_LIST_WLOCK_ASSERT() do { } while (0)
180 #ifdef NDEBUG
181 #define KASSERT(cond, msg) do {} while (0)
182 #define stats_abort() do {} while (0)
183 #else /* ! NDEBUG */
184 #define KASSERT(cond, msg) do { \
185 if (!(cond)) { \
186 panic msg; \
187 } \
188 } while (0)
189 #define stats_abort() abort()
190 #endif /* NDEBUG */
191 #define stats_free(ptr) free(ptr)
192 #define panic(fmt, ...) do { \
193 fprintf(stderr, (fmt), ##__VA_ARGS__); \
194 stats_abort(); \
195 } while (0)
196 #endif /* _KERNEL */
197
198 #define SB_V1_MAXSZ 65535
199
200 /* Obtain a blob offset pointer. */
201 #define BLOB_OFFSET(sb, off) ((void *)(((uint8_t *)(sb)) + (off)))
202
203 /*
204 * Number of VOIs in the blob's vois[] array. By virtue of struct voi being a
205 * power of 2 size, we can shift instead of divide. The shift amount must be
206 * updated if sizeof(struct voi) ever changes, which the assert should catch.
207 */
208 #define NVOIS(sb) ((int32_t)((((struct statsblobv1 *)(sb))->stats_off - \
209 sizeof(struct statsblobv1)) >> 3))
210 _Static_assert(sizeof(struct voi) == 8, "statsblobv1 voi ABI mismatch");
211
212 /* Try restrict names to alphanumeric and underscore to simplify JSON compat. */
213 const char *vs_stype2name[VS_NUM_STYPES] = {
214 [VS_STYPE_VOISTATE] = "VOISTATE",
215 [VS_STYPE_SUM] = "SUM",
216 [VS_STYPE_MAX] = "MAX",
217 [VS_STYPE_MIN] = "MIN",
218 [VS_STYPE_HIST] = "HIST",
219 [VS_STYPE_TDGST] = "TDGST",
220 };
221
222 const char *vs_stype2desc[VS_NUM_STYPES] = {
223 [VS_STYPE_VOISTATE] = "VOI related state data (not a real stat)",
224 [VS_STYPE_SUM] = "Simple arithmetic accumulator",
225 [VS_STYPE_MAX] = "Maximum observed VOI value",
226 [VS_STYPE_MIN] = "Minimum observed VOI value",
227 [VS_STYPE_HIST] = "Histogram of observed VOI values",
228 [VS_STYPE_TDGST] = "t-digest of observed VOI values",
229 };
230
231 const char *vsd_dtype2name[VSD_NUM_DTYPES] = {
232 [VSD_DTYPE_VOISTATE] = "VOISTATE",
233 [VSD_DTYPE_INT_S32] = "INT_S32",
234 [VSD_DTYPE_INT_U32] = "INT_U32",
235 [VSD_DTYPE_INT_S64] = "INT_S64",
236 [VSD_DTYPE_INT_U64] = "INT_U64",
237 [VSD_DTYPE_INT_SLONG] = "INT_SLONG",
238 [VSD_DTYPE_INT_ULONG] = "INT_ULONG",
239 [VSD_DTYPE_Q_S32] = "Q_S32",
240 [VSD_DTYPE_Q_U32] = "Q_U32",
241 [VSD_DTYPE_Q_S64] = "Q_S64",
242 [VSD_DTYPE_Q_U64] = "Q_U64",
243 [VSD_DTYPE_CRHIST32] = "CRHIST32",
244 [VSD_DTYPE_DRHIST32] = "DRHIST32",
245 [VSD_DTYPE_DVHIST32] = "DVHIST32",
246 [VSD_DTYPE_CRHIST64] = "CRHIST64",
247 [VSD_DTYPE_DRHIST64] = "DRHIST64",
248 [VSD_DTYPE_DVHIST64] = "DVHIST64",
249 [VSD_DTYPE_TDGSTCLUST32] = "TDGSTCLUST32",
250 [VSD_DTYPE_TDGSTCLUST64] = "TDGSTCLUST64",
251 };
252
253 const size_t vsd_dtype2size[VSD_NUM_DTYPES] = {
254 [VSD_DTYPE_VOISTATE] = sizeof(struct voistatdata_voistate),
255 [VSD_DTYPE_INT_S32] = sizeof(struct voistatdata_int32),
256 [VSD_DTYPE_INT_U32] = sizeof(struct voistatdata_int32),
257 [VSD_DTYPE_INT_S64] = sizeof(struct voistatdata_int64),
258 [VSD_DTYPE_INT_U64] = sizeof(struct voistatdata_int64),
259 [VSD_DTYPE_INT_SLONG] = sizeof(struct voistatdata_intlong),
260 [VSD_DTYPE_INT_ULONG] = sizeof(struct voistatdata_intlong),
261 [VSD_DTYPE_Q_S32] = sizeof(struct voistatdata_q32),
262 [VSD_DTYPE_Q_U32] = sizeof(struct voistatdata_q32),
263 [VSD_DTYPE_Q_S64] = sizeof(struct voistatdata_q64),
264 [VSD_DTYPE_Q_U64] = sizeof(struct voistatdata_q64),
265 [VSD_DTYPE_CRHIST32] = sizeof(struct voistatdata_crhist32),
266 [VSD_DTYPE_DRHIST32] = sizeof(struct voistatdata_drhist32),
267 [VSD_DTYPE_DVHIST32] = sizeof(struct voistatdata_dvhist32),
268 [VSD_DTYPE_CRHIST64] = sizeof(struct voistatdata_crhist64),
269 [VSD_DTYPE_DRHIST64] = sizeof(struct voistatdata_drhist64),
270 [VSD_DTYPE_DVHIST64] = sizeof(struct voistatdata_dvhist64),
271 [VSD_DTYPE_TDGSTCLUST32] = sizeof(struct voistatdata_tdgstclust32),
272 [VSD_DTYPE_TDGSTCLUST64] = sizeof(struct voistatdata_tdgstclust64),
273 };
274
275 static const bool vsd_compoundtype[VSD_NUM_DTYPES] = {
276 [VSD_DTYPE_VOISTATE] = true,
277 [VSD_DTYPE_INT_S32] = false,
278 [VSD_DTYPE_INT_U32] = false,
279 [VSD_DTYPE_INT_S64] = false,
280 [VSD_DTYPE_INT_U64] = false,
281 [VSD_DTYPE_INT_SLONG] = false,
282 [VSD_DTYPE_INT_ULONG] = false,
283 [VSD_DTYPE_Q_S32] = false,
284 [VSD_DTYPE_Q_U32] = false,
285 [VSD_DTYPE_Q_S64] = false,
286 [VSD_DTYPE_Q_U64] = false,
287 [VSD_DTYPE_CRHIST32] = true,
288 [VSD_DTYPE_DRHIST32] = true,
289 [VSD_DTYPE_DVHIST32] = true,
290 [VSD_DTYPE_CRHIST64] = true,
291 [VSD_DTYPE_DRHIST64] = true,
292 [VSD_DTYPE_DVHIST64] = true,
293 [VSD_DTYPE_TDGSTCLUST32] = true,
294 [VSD_DTYPE_TDGSTCLUST64] = true,
295 };
296
297 const struct voistatdata_numeric numeric_limits[2][VSD_DTYPE_Q_U64 + 1] = {
298 [LIM_MIN] = {
299 [VSD_DTYPE_VOISTATE] = {},
300 [VSD_DTYPE_INT_S32] = {.int32 = {.s32 = INT32_MIN}},
301 [VSD_DTYPE_INT_U32] = {.int32 = {.u32 = 0}},
302 [VSD_DTYPE_INT_S64] = {.int64 = {.s64 = INT64_MIN}},
303 [VSD_DTYPE_INT_U64] = {.int64 = {.u64 = 0}},
304 [VSD_DTYPE_INT_SLONG] = {.intlong = {.slong = LONG_MIN}},
305 [VSD_DTYPE_INT_ULONG] = {.intlong = {.ulong = 0}},
306 [VSD_DTYPE_Q_S32] = {.q32 = {.sq32 = Q_IFMINVAL(INT32_MIN)}},
307 [VSD_DTYPE_Q_U32] = {.q32 = {.uq32 = 0}},
308 [VSD_DTYPE_Q_S64] = {.q64 = {.sq64 = Q_IFMINVAL(INT64_MIN)}},
309 [VSD_DTYPE_Q_U64] = {.q64 = {.uq64 = 0}},
310 },
311 [LIM_MAX] = {
312 [VSD_DTYPE_VOISTATE] = {},
313 [VSD_DTYPE_INT_S32] = {.int32 = {.s32 = INT32_MAX}},
314 [VSD_DTYPE_INT_U32] = {.int32 = {.u32 = UINT32_MAX}},
315 [VSD_DTYPE_INT_S64] = {.int64 = {.s64 = INT64_MAX}},
316 [VSD_DTYPE_INT_U64] = {.int64 = {.u64 = UINT64_MAX}},
317 [VSD_DTYPE_INT_SLONG] = {.intlong = {.slong = LONG_MAX}},
318 [VSD_DTYPE_INT_ULONG] = {.intlong = {.ulong = ULONG_MAX}},
319 [VSD_DTYPE_Q_S32] = {.q32 = {.sq32 = Q_IFMAXVAL(INT32_MAX)}},
320 [VSD_DTYPE_Q_U32] = {.q32 = {.uq32 = Q_IFMAXVAL(UINT32_MAX)}},
321 [VSD_DTYPE_Q_S64] = {.q64 = {.sq64 = Q_IFMAXVAL(INT64_MAX)}},
322 [VSD_DTYPE_Q_U64] = {.q64 = {.uq64 = Q_IFMAXVAL(UINT64_MAX)}},
323 }
324 };
325
326 /* tpllistlock protects tpllist and ntpl */
327 static uint32_t ntpl;
328 static struct statsblob_tpl **tpllist;
329
330 static inline void * stats_realloc(void *ptr, size_t oldsz, size_t newsz,
331 int flags);
332 //static void stats_v1_blob_finalise(struct statsblobv1 *sb);
333 static int stats_v1_blob_init_locked(struct statsblobv1 *sb, uint32_t tpl_id,
334 uint32_t flags);
335 static int stats_v1_blob_expand(struct statsblobv1 **sbpp, int newvoibytes,
336 int newvoistatbytes, int newvoistatdatabytes);
337 static void stats_v1_blob_iter(struct statsblobv1 *sb,
338 stats_v1_blob_itercb_t icb, void *usrctx, uint32_t flags);
339 static inline int stats_v1_vsd_tdgst_add(enum vsd_dtype vs_dtype,
340 struct voistatdata_tdgst *tdgst, s64q_t x, uint64_t weight, int attempt);
341
342 static inline int
ctd32cmp(const struct voistatdata_tdgstctd32 * c1,const struct voistatdata_tdgstctd32 * c2)343 ctd32cmp(const struct voistatdata_tdgstctd32 *c1, const struct voistatdata_tdgstctd32 *c2)
344 {
345
346 KASSERT(Q_PRECEQ(c1->mu, c2->mu),
347 ("%s: Q_RELPREC(c1->mu,c2->mu)=%d", __func__,
348 Q_RELPREC(c1->mu, c2->mu)));
349
350 return (Q_QLTQ(c1->mu, c2->mu) ? -1 : 1);
351 }
352 ARB_GENERATE_STATIC(ctdth32, voistatdata_tdgstctd32, ctdlnk, ctd32cmp);
353
354 static inline int
ctd64cmp(const struct voistatdata_tdgstctd64 * c1,const struct voistatdata_tdgstctd64 * c2)355 ctd64cmp(const struct voistatdata_tdgstctd64 *c1, const struct voistatdata_tdgstctd64 *c2)
356 {
357
358 KASSERT(Q_PRECEQ(c1->mu, c2->mu),
359 ("%s: Q_RELPREC(c1->mu,c2->mu)=%d", __func__,
360 Q_RELPREC(c1->mu, c2->mu)));
361
362 return (Q_QLTQ(c1->mu, c2->mu) ? -1 : 1);
363 }
364 ARB_GENERATE_STATIC(ctdth64, voistatdata_tdgstctd64, ctdlnk, ctd64cmp);
365
366 #ifdef DIAGNOSTIC
367 RB_GENERATE_STATIC(rbctdth32, voistatdata_tdgstctd32, rblnk, ctd32cmp);
368 RB_GENERATE_STATIC(rbctdth64, voistatdata_tdgstctd64, rblnk, ctd64cmp);
369 #endif
370
371 static inline sbintime_t
stats_sbinuptime(void)372 stats_sbinuptime(void)
373 {
374 sbintime_t sbt;
375 #ifdef _KERNEL
376
377 sbt = sbinuptime();
378 #else /* ! _KERNEL */
379 struct timespec tp;
380
381 clock_gettime(CLOCK_MONOTONIC_FAST, &tp);
382 sbt = tstosbt(tp);
383 #endif /* _KERNEL */
384
385 return (sbt);
386 }
387
388 static inline void *
stats_realloc(void * ptr,size_t oldsz,size_t newsz,int flags)389 stats_realloc(void *ptr, size_t oldsz, size_t newsz, int flags)
390 {
391
392 #ifdef _KERNEL
393 /* Default to M_NOWAIT if neither M_NOWAIT or M_WAITOK are set. */
394 if (!(flags & (M_WAITOK | M_NOWAIT)))
395 flags |= M_NOWAIT;
396 ptr = realloc(ptr, newsz, M_STATS, flags);
397 #else /* ! _KERNEL */
398 ptr = realloc(ptr, newsz);
399 if ((flags & M_ZERO) && ptr != NULL) {
400 if (oldsz == 0)
401 memset(ptr, '\0', newsz);
402 else if (newsz > oldsz)
403 memset(BLOB_OFFSET(ptr, oldsz), '\0', newsz - oldsz);
404 }
405 #endif /* _KERNEL */
406
407 return (ptr);
408 }
409
410 static inline char *
stats_strdup(const char * s,int flags)411 stats_strdup(const char *s,
412 #ifdef _KERNEL
413 int flags)
414 {
415 char *copy;
416 size_t len;
417
418 if (!(flags & (M_WAITOK | M_NOWAIT)))
419 flags |= M_NOWAIT;
420
421 len = strlen(s) + 1;
422 if ((copy = malloc(len, M_STATS, flags)) != NULL)
423 bcopy(s, copy, len);
424
425 return (copy);
426 #else
427 int flags __unused)
428 {
429 return (strdup(s));
430 #endif
431 }
432
433 static inline void
434 stats_tpl_update_hash(struct statsblob_tpl *tpl)
435 {
436
437 TPL_LIST_WLOCK_ASSERT();
438 tpl->mb->tplhash = hash32_str(tpl->mb->tplname, 0);
439 for (int voi_id = 0; voi_id < NVOIS(tpl->sb); voi_id++) {
440 if (tpl->mb->voi_meta[voi_id].name != NULL)
441 tpl->mb->tplhash = hash32_str(
442 tpl->mb->voi_meta[voi_id].name, tpl->mb->tplhash);
443 }
444 tpl->mb->tplhash = hash32_buf(tpl->sb, tpl->sb->cursz,
445 tpl->mb->tplhash);
446 }
447
448 static inline uint64_t
449 stats_pow_u64(uint64_t base, uint64_t exp)
450 {
451 uint64_t result = 1;
452
453 while (exp) {
454 if (exp & 1)
455 result *= base;
456 exp >>= 1;
457 base *= base;
458 }
459
460 return (result);
461 }
462
463 static inline int
464 stats_vss_hist_bkt_hlpr(struct vss_hist_hlpr_info *info, uint32_t curbkt,
465 struct voistatdata_numeric *bkt_lb, struct voistatdata_numeric *bkt_ub)
466 {
467 uint64_t step = 0;
468 int error = 0;
469
470 switch (info->scheme) {
471 case BKT_LIN:
472 step = info->lin.stepinc;
473 break;
474 case BKT_EXP:
475 step = stats_pow_u64(info->exp.stepbase,
476 info->exp.stepexp + curbkt);
477 break;
478 case BKT_LINEXP:
479 {
480 uint64_t curstepexp = 1;
481
482 switch (info->voi_dtype) {
483 case VSD_DTYPE_INT_S32:
484 while ((int32_t)stats_pow_u64(info->linexp.stepbase,
485 curstepexp) <= bkt_lb->int32.s32)
486 curstepexp++;
487 break;
488 case VSD_DTYPE_INT_U32:
489 while ((uint32_t)stats_pow_u64(info->linexp.stepbase,
490 curstepexp) <= bkt_lb->int32.u32)
491 curstepexp++;
492 break;
493 case VSD_DTYPE_INT_S64:
494 while ((int64_t)stats_pow_u64(info->linexp.stepbase,
495 curstepexp) <= bkt_lb->int64.s64)
496 curstepexp++;
497 break;
498 case VSD_DTYPE_INT_U64:
499 while ((uint64_t)stats_pow_u64(info->linexp.stepbase,
500 curstepexp) <= bkt_lb->int64.u64)
501 curstepexp++;
502 break;
503 case VSD_DTYPE_INT_SLONG:
504 while ((long)stats_pow_u64(info->linexp.stepbase,
505 curstepexp) <= bkt_lb->intlong.slong)
506 curstepexp++;
507 break;
508 case VSD_DTYPE_INT_ULONG:
509 while ((unsigned long)stats_pow_u64(info->linexp.stepbase,
510 curstepexp) <= bkt_lb->intlong.ulong)
511 curstepexp++;
512 break;
513 case VSD_DTYPE_Q_S32:
514 while ((s32q_t)stats_pow_u64(info->linexp.stepbase,
515 curstepexp) <= Q_GIVAL(bkt_lb->q32.sq32))
516 break;
517 case VSD_DTYPE_Q_U32:
518 while ((u32q_t)stats_pow_u64(info->linexp.stepbase,
519 curstepexp) <= Q_GIVAL(bkt_lb->q32.uq32))
520 break;
521 case VSD_DTYPE_Q_S64:
522 while ((s64q_t)stats_pow_u64(info->linexp.stepbase,
523 curstepexp) <= Q_GIVAL(bkt_lb->q64.sq64))
524 curstepexp++;
525 break;
526 case VSD_DTYPE_Q_U64:
527 while ((u64q_t)stats_pow_u64(info->linexp.stepbase,
528 curstepexp) <= Q_GIVAL(bkt_lb->q64.uq64))
529 curstepexp++;
530 break;
531 default:
532 break;
533 }
534
535 step = stats_pow_u64(info->linexp.stepbase, curstepexp) /
536 info->linexp.linstepdiv;
537 if (step == 0)
538 step = 1;
539 break;
540 }
541 default:
542 break;
543 }
544
545 if (info->scheme == BKT_USR) {
546 *bkt_lb = info->usr.bkts[curbkt].lb;
547 *bkt_ub = info->usr.bkts[curbkt].ub;
548 } else if (step != 0) {
549 switch (info->voi_dtype) {
550 case VSD_DTYPE_INT_S32:
551 bkt_ub->int32.s32 += (int32_t)step;
552 break;
553 case VSD_DTYPE_INT_U32:
554 bkt_ub->int32.u32 += (uint32_t)step;
555 break;
556 case VSD_DTYPE_INT_S64:
557 bkt_ub->int64.s64 += (int64_t)step;
558 break;
559 case VSD_DTYPE_INT_U64:
560 bkt_ub->int64.u64 += (uint64_t)step;
561 break;
562 case VSD_DTYPE_INT_SLONG:
563 bkt_ub->intlong.slong += (long)step;
564 break;
565 case VSD_DTYPE_INT_ULONG:
566 bkt_ub->intlong.ulong += (unsigned long)step;
567 break;
568 case VSD_DTYPE_Q_S32:
569 error = Q_QADDI(&bkt_ub->q32.sq32, step);
570 break;
571 case VSD_DTYPE_Q_U32:
572 error = Q_QADDI(&bkt_ub->q32.uq32, step);
573 break;
574 case VSD_DTYPE_Q_S64:
575 error = Q_QADDI(&bkt_ub->q64.sq64, step);
576 break;
577 case VSD_DTYPE_Q_U64:
578 error = Q_QADDI(&bkt_ub->q64.uq64, step);
579 break;
580 default:
581 break;
582 }
583 } else { /* info->scheme != BKT_USR && step == 0 */
584 return (EINVAL);
585 }
586
587 return (error);
588 }
589
590 static uint32_t
591 stats_vss_hist_nbkts_hlpr(struct vss_hist_hlpr_info *info)
592 {
593 struct voistatdata_numeric bkt_lb, bkt_ub;
594 uint32_t nbkts;
595 int done;
596
597 if (info->scheme == BKT_USR) {
598 /* XXXLAS: Setting info->{lb,ub} from macro is tricky. */
599 info->lb = info->usr.bkts[0].lb;
600 info->ub = info->usr.bkts[info->usr.nbkts - 1].lb;
601 }
602
603 nbkts = 0;
604 done = 0;
605 bkt_ub = info->lb;
606
607 do {
608 bkt_lb = bkt_ub;
609 if (stats_vss_hist_bkt_hlpr(info, nbkts++, &bkt_lb, &bkt_ub))
610 return (0);
611
612 if (info->scheme == BKT_USR)
613 done = (nbkts == info->usr.nbkts);
614 else {
615 switch (info->voi_dtype) {
616 case VSD_DTYPE_INT_S32:
617 done = (bkt_ub.int32.s32 > info->ub.int32.s32);
618 break;
619 case VSD_DTYPE_INT_U32:
620 done = (bkt_ub.int32.u32 > info->ub.int32.u32);
621 break;
622 case VSD_DTYPE_INT_S64:
623 done = (bkt_ub.int64.s64 > info->ub.int64.s64);
624 break;
625 case VSD_DTYPE_INT_U64:
626 done = (bkt_ub.int64.u64 > info->ub.int64.u64);
627 break;
628 case VSD_DTYPE_INT_SLONG:
629 done = (bkt_ub.intlong.slong >
630 info->ub.intlong.slong);
631 break;
632 case VSD_DTYPE_INT_ULONG:
633 done = (bkt_ub.intlong.ulong >
634 info->ub.intlong.ulong);
635 break;
636 case VSD_DTYPE_Q_S32:
637 done = Q_QGTQ(bkt_ub.q32.sq32,
638 info->ub.q32.sq32);
639 break;
640 case VSD_DTYPE_Q_U32:
641 done = Q_QGTQ(bkt_ub.q32.uq32,
642 info->ub.q32.uq32);
643 break;
644 case VSD_DTYPE_Q_S64:
645 done = Q_QGTQ(bkt_ub.q64.sq64,
646 info->ub.q64.sq64);
647 break;
648 case VSD_DTYPE_Q_U64:
649 done = Q_QGTQ(bkt_ub.q64.uq64,
650 info->ub.q64.uq64);
651 break;
652 default:
653 return (0);
654 }
655 }
656 } while (!done);
657
658 if (info->flags & VSD_HIST_LBOUND_INF)
659 nbkts++;
660 if (info->flags & VSD_HIST_UBOUND_INF)
661 nbkts++;
662
663 return (nbkts);
664 }
665
666 int
667 stats_vss_hist_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
668 struct vss_hist_hlpr_info *info)
669 {
670 struct voistatdata_hist *hist;
671 struct voistatdata_numeric bkt_lb, bkt_ub, *lbinfbktlb, *lbinfbktub,
672 *ubinfbktlb, *ubinfbktub;
673 uint32_t bkt, nbkts, nloop;
674
675 if (vss == NULL || info == NULL || (info->flags &
676 (VSD_HIST_LBOUND_INF|VSD_HIST_UBOUND_INF) && (info->hist_dtype ==
677 VSD_DTYPE_DVHIST32 || info->hist_dtype == VSD_DTYPE_DVHIST64)))
678 return (EINVAL);
679
680 info->voi_dtype = voi_dtype;
681
682 if ((nbkts = stats_vss_hist_nbkts_hlpr(info)) == 0)
683 return (EINVAL);
684
685 switch (info->hist_dtype) {
686 case VSD_DTYPE_CRHIST32:
687 vss->vsdsz = HIST_NBKTS2VSDSZ(crhist32, nbkts);
688 break;
689 case VSD_DTYPE_DRHIST32:
690 vss->vsdsz = HIST_NBKTS2VSDSZ(drhist32, nbkts);
691 break;
692 case VSD_DTYPE_DVHIST32:
693 vss->vsdsz = HIST_NBKTS2VSDSZ(dvhist32, nbkts);
694 break;
695 case VSD_DTYPE_CRHIST64:
696 vss->vsdsz = HIST_NBKTS2VSDSZ(crhist64, nbkts);
697 break;
698 case VSD_DTYPE_DRHIST64:
699 vss->vsdsz = HIST_NBKTS2VSDSZ(drhist64, nbkts);
700 break;
701 case VSD_DTYPE_DVHIST64:
702 vss->vsdsz = HIST_NBKTS2VSDSZ(dvhist64, nbkts);
703 break;
704 default:
705 return (EINVAL);
706 }
707
708 vss->iv = stats_realloc(NULL, 0, vss->vsdsz, M_ZERO);
709 if (vss->iv == NULL)
710 return (ENOMEM);
711
712 hist = (struct voistatdata_hist *)vss->iv;
713 bkt_ub = info->lb;
714
715 for (bkt = (info->flags & VSD_HIST_LBOUND_INF), nloop = 0;
716 bkt < nbkts;
717 bkt++, nloop++) {
718 bkt_lb = bkt_ub;
719 if (stats_vss_hist_bkt_hlpr(info, nloop, &bkt_lb, &bkt_ub))
720 return (EINVAL);
721
722 switch (info->hist_dtype) {
723 case VSD_DTYPE_CRHIST32:
724 VSD(crhist32, hist)->bkts[bkt].lb = bkt_lb;
725 break;
726 case VSD_DTYPE_DRHIST32:
727 VSD(drhist32, hist)->bkts[bkt].lb = bkt_lb;
728 VSD(drhist32, hist)->bkts[bkt].ub = bkt_ub;
729 break;
730 case VSD_DTYPE_DVHIST32:
731 VSD(dvhist32, hist)->bkts[bkt].val = bkt_lb;
732 break;
733 case VSD_DTYPE_CRHIST64:
734 VSD(crhist64, hist)->bkts[bkt].lb = bkt_lb;
735 break;
736 case VSD_DTYPE_DRHIST64:
737 VSD(drhist64, hist)->bkts[bkt].lb = bkt_lb;
738 VSD(drhist64, hist)->bkts[bkt].ub = bkt_ub;
739 break;
740 case VSD_DTYPE_DVHIST64:
741 VSD(dvhist64, hist)->bkts[bkt].val = bkt_lb;
742 break;
743 default:
744 return (EINVAL);
745 }
746 }
747
748 lbinfbktlb = lbinfbktub = ubinfbktlb = ubinfbktub = NULL;
749
750 switch (info->hist_dtype) {
751 case VSD_DTYPE_CRHIST32:
752 lbinfbktlb = &VSD(crhist32, hist)->bkts[0].lb;
753 ubinfbktlb = &VSD(crhist32, hist)->bkts[nbkts - 1].lb;
754 break;
755 case VSD_DTYPE_DRHIST32:
756 lbinfbktlb = &VSD(drhist32, hist)->bkts[0].lb;
757 lbinfbktub = &VSD(drhist32, hist)->bkts[0].ub;
758 ubinfbktlb = &VSD(drhist32, hist)->bkts[nbkts - 1].lb;
759 ubinfbktub = &VSD(drhist32, hist)->bkts[nbkts - 1].ub;
760 break;
761 case VSD_DTYPE_CRHIST64:
762 lbinfbktlb = &VSD(crhist64, hist)->bkts[0].lb;
763 ubinfbktlb = &VSD(crhist64, hist)->bkts[nbkts - 1].lb;
764 break;
765 case VSD_DTYPE_DRHIST64:
766 lbinfbktlb = &VSD(drhist64, hist)->bkts[0].lb;
767 lbinfbktub = &VSD(drhist64, hist)->bkts[0].ub;
768 ubinfbktlb = &VSD(drhist64, hist)->bkts[nbkts - 1].lb;
769 ubinfbktub = &VSD(drhist64, hist)->bkts[nbkts - 1].ub;
770 break;
771 case VSD_DTYPE_DVHIST32:
772 case VSD_DTYPE_DVHIST64:
773 break;
774 default:
775 return (EINVAL);
776 }
777
778 if ((info->flags & VSD_HIST_LBOUND_INF) && lbinfbktlb) {
779 *lbinfbktlb = numeric_limits[LIM_MIN][info->voi_dtype];
780 /*
781 * Assignment from numeric_limit array for Q types assigns max
782 * possible integral/fractional value for underlying data type,
783 * but we must set control bits for this specific histogram per
784 * the user's choice of fractional bits, which we extract from
785 * info->lb.
786 */
787 if (info->voi_dtype == VSD_DTYPE_Q_S32 ||
788 info->voi_dtype == VSD_DTYPE_Q_U32) {
789 /* Signedness doesn't matter for setting control bits. */
790 Q_SCVAL(lbinfbktlb->q32.sq32,
791 Q_GCVAL(info->lb.q32.sq32));
792 } else if (info->voi_dtype == VSD_DTYPE_Q_S64 ||
793 info->voi_dtype == VSD_DTYPE_Q_U64) {
794 /* Signedness doesn't matter for setting control bits. */
795 Q_SCVAL(lbinfbktlb->q64.sq64,
796 Q_GCVAL(info->lb.q64.sq64));
797 }
798 if (lbinfbktub)
799 *lbinfbktub = info->lb;
800 }
801 if ((info->flags & VSD_HIST_UBOUND_INF) && ubinfbktlb) {
802 *ubinfbktlb = bkt_lb;
803 if (ubinfbktub) {
804 *ubinfbktub = numeric_limits[LIM_MAX][info->voi_dtype];
805 if (info->voi_dtype == VSD_DTYPE_Q_S32 ||
806 info->voi_dtype == VSD_DTYPE_Q_U32) {
807 Q_SCVAL(ubinfbktub->q32.sq32,
808 Q_GCVAL(info->lb.q32.sq32));
809 } else if (info->voi_dtype == VSD_DTYPE_Q_S64 ||
810 info->voi_dtype == VSD_DTYPE_Q_U64) {
811 Q_SCVAL(ubinfbktub->q64.sq64,
812 Q_GCVAL(info->lb.q64.sq64));
813 }
814 }
815 }
816
817 return (0);
818 }
819
820 int
821 stats_vss_tdgst_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
822 struct vss_tdgst_hlpr_info *info)
823 {
824 struct voistatdata_tdgst *tdgst;
825 struct ctdth32 *ctd32tree;
826 struct ctdth64 *ctd64tree;
827 struct voistatdata_tdgstctd32 *ctd32;
828 struct voistatdata_tdgstctd64 *ctd64;
829
830 info->voi_dtype = voi_dtype;
831
832 switch (info->tdgst_dtype) {
833 case VSD_DTYPE_TDGSTCLUST32:
834 vss->vsdsz = TDGST_NCTRS2VSDSZ(tdgstclust32, info->nctds);
835 break;
836 case VSD_DTYPE_TDGSTCLUST64:
837 vss->vsdsz = TDGST_NCTRS2VSDSZ(tdgstclust64, info->nctds);
838 break;
839 default:
840 return (EINVAL);
841 }
842
843 vss->iv = stats_realloc(NULL, 0, vss->vsdsz, M_ZERO);
844 if (vss->iv == NULL)
845 return (ENOMEM);
846
847 tdgst = (struct voistatdata_tdgst *)vss->iv;
848
849 switch (info->tdgst_dtype) {
850 case VSD_DTYPE_TDGSTCLUST32:
851 ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
852 ARB_INIT(ctd32, ctdlnk, ctd32tree, info->nctds) {
853 Q_INI(&ctd32->mu, 0, 0, info->prec);
854 }
855 break;
856 case VSD_DTYPE_TDGSTCLUST64:
857 ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
858 ARB_INIT(ctd64, ctdlnk, ctd64tree, info->nctds) {
859 Q_INI(&ctd64->mu, 0, 0, info->prec);
860 }
861 break;
862 default:
863 return (EINVAL);
864 }
865
866 return (0);
867 }
868
869 int
870 stats_vss_numeric_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
871 struct vss_numeric_hlpr_info *info)
872 {
873 struct voistatdata_numeric iv;
874
875 switch (vss->stype) {
876 case VS_STYPE_SUM:
877 iv = stats_ctor_vsd_numeric(0);
878 break;
879 case VS_STYPE_MIN:
880 iv = numeric_limits[LIM_MAX][voi_dtype];
881 break;
882 case VS_STYPE_MAX:
883 iv = numeric_limits[LIM_MIN][voi_dtype];
884 break;
885 default:
886 return (EINVAL);
887 }
888
889 vss->iv = stats_realloc(NULL, 0, vsd_dtype2size[voi_dtype], 0);
890 if (vss->iv == NULL)
891 return (ENOMEM);
892
893 vss->vs_dtype = voi_dtype;
894 vss->vsdsz = vsd_dtype2size[voi_dtype];
895 switch (voi_dtype) {
896 case VSD_DTYPE_INT_S32:
897 *((int32_t *)vss->iv) = iv.int32.s32;
898 break;
899 case VSD_DTYPE_INT_U32:
900 *((uint32_t *)vss->iv) = iv.int32.u32;
901 break;
902 case VSD_DTYPE_INT_S64:
903 *((int64_t *)vss->iv) = iv.int64.s64;
904 break;
905 case VSD_DTYPE_INT_U64:
906 *((uint64_t *)vss->iv) = iv.int64.u64;
907 break;
908 case VSD_DTYPE_INT_SLONG:
909 *((long *)vss->iv) = iv.intlong.slong;
910 break;
911 case VSD_DTYPE_INT_ULONG:
912 *((unsigned long *)vss->iv) = iv.intlong.ulong;
913 break;
914 case VSD_DTYPE_Q_S32:
915 *((s32q_t *)vss->iv) = Q_SCVAL(iv.q32.sq32,
916 Q_CTRLINI(info->prec));
917 break;
918 case VSD_DTYPE_Q_U32:
919 *((u32q_t *)vss->iv) = Q_SCVAL(iv.q32.uq32,
920 Q_CTRLINI(info->prec));
921 break;
922 case VSD_DTYPE_Q_S64:
923 *((s64q_t *)vss->iv) = Q_SCVAL(iv.q64.sq64,
924 Q_CTRLINI(info->prec));
925 break;
926 case VSD_DTYPE_Q_U64:
927 *((u64q_t *)vss->iv) = Q_SCVAL(iv.q64.uq64,
928 Q_CTRLINI(info->prec));
929 break;
930 default:
931 break;
932 }
933
934 return (0);
935 }
936
937 int
938 stats_vss_hlpr_init(enum vsd_dtype voi_dtype, uint32_t nvss,
939 struct voistatspec *vss)
940 {
941 int i, ret;
942
943 for (i = nvss - 1; i >= 0; i--) {
944 if (vss[i].hlpr && (ret = vss[i].hlpr(voi_dtype, &vss[i],
945 vss[i].hlprinfo)) != 0)
946 return (ret);
947 }
948
949 return (0);
950 }
951
952 void
953 stats_vss_hlpr_cleanup(uint32_t nvss, struct voistatspec *vss)
954 {
955 int i;
956
957 for (i = nvss - 1; i >= 0; i--) {
958 if (vss[i].hlpr) {
959 stats_free((void *)vss[i].iv);
960 vss[i].iv = NULL;
961 }
962 }
963 }
964
965 int
966 stats_tpl_fetch(int tpl_id, struct statsblob_tpl **tpl)
967 {
968 int error;
969
970 error = 0;
971
972 TPL_LIST_WLOCK();
973 if (tpl_id < 0 || tpl_id >= (int)ntpl) {
974 error = ENOENT;
975 } else {
976 *tpl = tpllist[tpl_id];
977 /* XXXLAS: Acquire refcount on tpl. */
978 }
979 TPL_LIST_WUNLOCK();
980
981 return (error);
982 }
983
984 int
985 stats_tpl_fetch_allocid(const char *name, uint32_t hash)
986 {
987 int i, tpl_id;
988
989 tpl_id = -ESRCH;
990
991 TPL_LIST_RLOCK();
992 for (i = ntpl - 1; i >= 0; i--) {
993 if (name != NULL) {
994 if (strlen(name) == strlen(tpllist[i]->mb->tplname) &&
995 strncmp(name, tpllist[i]->mb->tplname,
996 TPL_MAX_NAME_LEN) == 0 && (!hash || hash ==
997 tpllist[i]->mb->tplhash)) {
998 tpl_id = i;
999 break;
1000 }
1001 } else if (hash == tpllist[i]->mb->tplhash) {
1002 tpl_id = i;
1003 break;
1004 }
1005 }
1006 TPL_LIST_RUNLOCK();
1007
1008 return (tpl_id);
1009 }
1010
1011 int
1012 stats_tpl_id2name(uint32_t tpl_id, char *buf, size_t len)
1013 {
1014 int error;
1015
1016 error = 0;
1017
1018 TPL_LIST_RLOCK();
1019 if (tpl_id < ntpl) {
1020 if (buf != NULL && len > strlen(tpllist[tpl_id]->mb->tplname))
1021 strlcpy(buf, tpllist[tpl_id]->mb->tplname, len);
1022 else
1023 error = EOVERFLOW;
1024 } else
1025 error = ENOENT;
1026 TPL_LIST_RUNLOCK();
1027
1028 return (error);
1029 }
1030
1031 int
1032 stats_tpl_sample_rollthedice(struct stats_tpl_sample_rate *rates, int nrates,
1033 void *seed_bytes, size_t seed_len)
1034 {
1035 uint32_t cum_pct, rnd_pct;
1036 int i;
1037
1038 cum_pct = 0;
1039
1040 /*
1041 * Choose a pseudorandom or seeded number in range [0,100] and use
1042 * it to make a sampling decision and template selection where required.
1043 * If no seed is supplied, a PRNG is used to generate a pseudorandom
1044 * number so that every selection is independent. If a seed is supplied,
1045 * the caller desires random selection across different seeds, but
1046 * deterministic selection given the same seed. This is achieved by
1047 * hashing the seed and using the hash as the random number source.
1048 *
1049 * XXXLAS: Characterise hash function output distribution.
1050 */
1051 if (seed_bytes == NULL)
1052 rnd_pct = random() / (INT32_MAX / 100);
1053 else
1054 rnd_pct = hash32_buf(seed_bytes, seed_len, 0) /
1055 (UINT32_MAX / 100U);
1056
1057 /*
1058 * We map the randomly selected percentage on to the interval [0,100]
1059 * consisting of the cumulatively summed template sampling percentages.
1060 * The difference between the cumulative sum of all template sampling
1061 * percentages and 100 is treated as a NULL assignment i.e. no stats
1062 * template will be assigned, and -1 returned instead.
1063 */
1064 for (i = 0; i < nrates; i++) {
1065 cum_pct += rates[i].tpl_sample_pct;
1066
1067 KASSERT(cum_pct <= 100, ("%s cum_pct %u > 100", __func__,
1068 cum_pct));
1069 if (rnd_pct > cum_pct || rates[i].tpl_sample_pct == 0)
1070 continue;
1071
1072 return (rates[i].tpl_slot_id);
1073 }
1074
1075 return (-1);
1076 }
1077
1078 int
1079 stats_v1_blob_clone(struct statsblobv1 **dst, size_t dstmaxsz,
1080 struct statsblobv1 *src, uint32_t flags)
1081 {
1082 int error;
1083
1084 error = 0;
1085
1086 if (src == NULL || dst == NULL ||
1087 src->cursz < sizeof(struct statsblob) ||
1088 ((flags & SB_CLONE_ALLOCDST) &&
1089 (flags & (SB_CLONE_USRDSTNOFAULT | SB_CLONE_USRDST)))) {
1090 error = EINVAL;
1091 } else if (flags & SB_CLONE_ALLOCDST) {
1092 *dst = stats_realloc(NULL, 0, src->cursz, 0);
1093 if (*dst)
1094 (*dst)->maxsz = dstmaxsz = src->cursz;
1095 else
1096 error = ENOMEM;
1097 } else if (*dst == NULL || dstmaxsz < sizeof(struct statsblob)) {
1098 error = EINVAL;
1099 }
1100
1101 if (!error) {
1102 size_t postcurszlen;
1103
1104 /*
1105 * Clone src into dst except for the maxsz field. If dst is too
1106 * small to hold all of src, only copy src's header and return
1107 * EOVERFLOW.
1108 */
1109 #ifdef _KERNEL
1110 if (flags & SB_CLONE_USRDSTNOFAULT)
1111 copyout_nofault(src, *dst,
1112 offsetof(struct statsblob, maxsz));
1113 else if (flags & SB_CLONE_USRDST)
1114 copyout(src, *dst, offsetof(struct statsblob, maxsz));
1115 else
1116 #endif
1117 memcpy(*dst, src, offsetof(struct statsblob, maxsz));
1118
1119 if (dstmaxsz >= src->cursz) {
1120 postcurszlen = src->cursz -
1121 offsetof(struct statsblob, cursz);
1122 } else {
1123 error = EOVERFLOW;
1124 postcurszlen = sizeof(struct statsblob) -
1125 offsetof(struct statsblob, cursz);
1126 }
1127 #ifdef _KERNEL
1128 if (flags & SB_CLONE_USRDSTNOFAULT)
1129 copyout_nofault(&(src->cursz), &((*dst)->cursz),
1130 postcurszlen);
1131 else if (flags & SB_CLONE_USRDST)
1132 copyout(&(src->cursz), &((*dst)->cursz), postcurszlen);
1133 else
1134 #endif
1135 memcpy(&((*dst)->cursz), &(src->cursz), postcurszlen);
1136 }
1137
1138 return (error);
1139 }
1140
1141 int
1142 stats_v1_tpl_alloc(const char *name, uint32_t flags __unused)
1143 {
1144 struct statsblobv1_tpl *tpl, **newtpllist;
1145 struct statsblobv1 *tpl_sb;
1146 struct metablob *tpl_mb;
1147 int tpl_id;
1148
1149 if (name != NULL && strlen(name) > TPL_MAX_NAME_LEN)
1150 return (-EINVAL);
1151
1152 if (name != NULL && stats_tpl_fetch_allocid(name, 0) >= 0)
1153 return (-EEXIST);
1154
1155 tpl = stats_realloc(NULL, 0, sizeof(struct statsblobv1_tpl), M_ZERO);
1156 tpl_mb = stats_realloc(NULL, 0, sizeof(struct metablob), M_ZERO);
1157 tpl_sb = stats_realloc(NULL, 0, sizeof(struct statsblobv1), M_ZERO);
1158
1159 if (tpl_mb != NULL && name != NULL)
1160 tpl_mb->tplname = stats_strdup(name, 0);
1161
1162 if (tpl == NULL || tpl_sb == NULL || tpl_mb == NULL ||
1163 tpl_mb->tplname == NULL) {
1164 stats_free(tpl);
1165 stats_free(tpl_sb);
1166 if (tpl_mb != NULL) {
1167 stats_free(tpl_mb->tplname);
1168 stats_free(tpl_mb);
1169 }
1170 return (-ENOMEM);
1171 }
1172
1173 tpl->mb = tpl_mb;
1174 tpl->sb = tpl_sb;
1175
1176 tpl_sb->abi = STATS_ABI_V1;
1177 tpl_sb->endian =
1178 #if BYTE_ORDER == LITTLE_ENDIAN
1179 SB_LE;
1180 #elif BYTE_ORDER == BIG_ENDIAN
1181 SB_BE;
1182 #else
1183 SB_UE;
1184 #endif
1185 tpl_sb->cursz = tpl_sb->maxsz = sizeof(struct statsblobv1);
1186 tpl_sb->stats_off = tpl_sb->statsdata_off = sizeof(struct statsblobv1);
1187
1188 TPL_LIST_WLOCK();
1189 newtpllist = stats_realloc(tpllist, ntpl * sizeof(void *),
1190 (ntpl + 1) * sizeof(void *), 0);
1191 if (newtpllist != NULL) {
1192 tpl_id = ntpl++;
1193 tpllist = (struct statsblob_tpl **)newtpllist;
1194 tpllist[tpl_id] = (struct statsblob_tpl *)tpl;
1195 stats_tpl_update_hash(tpllist[tpl_id]);
1196 } else {
1197 stats_free(tpl);
1198 stats_free(tpl_sb);
1199 if (tpl_mb != NULL) {
1200 stats_free(tpl_mb->tplname);
1201 stats_free(tpl_mb);
1202 }
1203 tpl_id = -ENOMEM;
1204 }
1205 TPL_LIST_WUNLOCK();
1206
1207 return (tpl_id);
1208 }
1209
1210 int
1211 stats_v1_tpl_add_voistats(uint32_t tpl_id, int32_t voi_id, const char *voi_name,
1212 enum vsd_dtype voi_dtype, uint32_t nvss, struct voistatspec *vss,
1213 uint32_t flags)
1214 {
1215 struct voi *voi;
1216 struct voistat *tmpstat;
1217 struct statsblobv1 *tpl_sb;
1218 struct metablob *tpl_mb;
1219 int error, i, newstatdataidx, newvoibytes, newvoistatbytes,
1220 newvoistatdatabytes, newvoistatmaxid;
1221 uint32_t nbytes;
1222
1223 if (voi_id < 0 || voi_dtype == 0 || voi_dtype >= VSD_NUM_DTYPES ||
1224 nvss == 0 || vss == NULL)
1225 return (EINVAL);
1226
1227 error = nbytes = newvoibytes = newvoistatbytes =
1228 newvoistatdatabytes = 0;
1229 newvoistatmaxid = -1;
1230
1231 /* Calculate the number of bytes required for the new voistats. */
1232 for (i = nvss - 1; i >= 0; i--) {
1233 if (vss[i].stype == 0 || vss[i].stype >= VS_NUM_STYPES ||
1234 vss[i].vs_dtype == 0 || vss[i].vs_dtype >= VSD_NUM_DTYPES ||
1235 vss[i].iv == NULL || vss[i].vsdsz == 0)
1236 return (EINVAL);
1237 if ((int)vss[i].stype > newvoistatmaxid)
1238 newvoistatmaxid = vss[i].stype;
1239 newvoistatdatabytes += vss[i].vsdsz;
1240 }
1241
1242 if (flags & SB_VOI_RELUPDATE) {
1243 /* XXXLAS: VOI state bytes may need to vary based on stat types. */
1244 newvoistatdatabytes += sizeof(struct voistatdata_voistate);
1245 }
1246 nbytes += newvoistatdatabytes;
1247
1248 TPL_LIST_WLOCK();
1249 if (tpl_id < ntpl) {
1250 tpl_sb = (struct statsblobv1 *)tpllist[tpl_id]->sb;
1251 tpl_mb = tpllist[tpl_id]->mb;
1252
1253 if (voi_id >= NVOIS(tpl_sb) || tpl_sb->vois[voi_id].id == -1) {
1254 /* Adding a new VOI and associated stats. */
1255 if (voi_id >= NVOIS(tpl_sb)) {
1256 /* We need to grow the tpl_sb->vois array. */
1257 newvoibytes = (voi_id - (NVOIS(tpl_sb) - 1)) *
1258 sizeof(struct voi);
1259 nbytes += newvoibytes;
1260 }
1261 newvoistatbytes =
1262 (newvoistatmaxid + 1) * sizeof(struct voistat);
1263 } else {
1264 /* Adding stats to an existing VOI. */
1265 if (newvoistatmaxid >
1266 tpl_sb->vois[voi_id].voistatmaxid) {
1267 newvoistatbytes = (newvoistatmaxid -
1268 tpl_sb->vois[voi_id].voistatmaxid) *
1269 sizeof(struct voistat);
1270 }
1271 /* XXXLAS: KPI does not yet support expanding VOIs. */
1272 error = EOPNOTSUPP;
1273 }
1274 nbytes += newvoistatbytes;
1275
1276 if (!error && newvoibytes > 0) {
1277 struct voi_meta *voi_meta = tpl_mb->voi_meta;
1278
1279 voi_meta = stats_realloc(voi_meta, voi_meta == NULL ?
1280 0 : NVOIS(tpl_sb) * sizeof(struct voi_meta),
1281 (1 + voi_id) * sizeof(struct voi_meta),
1282 M_ZERO);
1283
1284 if (voi_meta == NULL)
1285 error = ENOMEM;
1286 else
1287 tpl_mb->voi_meta = voi_meta;
1288 }
1289
1290 if (!error) {
1291 /* NB: Resizing can change where tpl_sb points. */
1292 error = stats_v1_blob_expand(&tpl_sb, newvoibytes,
1293 newvoistatbytes, newvoistatdatabytes);
1294 }
1295
1296 if (!error) {
1297 tpl_mb->voi_meta[voi_id].name = stats_strdup(voi_name,
1298 0);
1299 if (tpl_mb->voi_meta[voi_id].name == NULL)
1300 error = ENOMEM;
1301 }
1302
1303 if (!error) {
1304 /* Update the template list with the resized pointer. */
1305 tpllist[tpl_id]->sb = (struct statsblob *)tpl_sb;
1306
1307 /* Update the template. */
1308 voi = &tpl_sb->vois[voi_id];
1309
1310 if (voi->id < 0) {
1311 /* VOI is new and needs to be initialised. */
1312 voi->id = voi_id;
1313 voi->dtype = voi_dtype;
1314 voi->stats_off = tpl_sb->stats_off;
1315 if (flags & SB_VOI_RELUPDATE)
1316 voi->flags |= VOI_REQSTATE;
1317 } else {
1318 /*
1319 * XXXLAS: When this else block is written, the
1320 * "KPI does not yet support expanding VOIs"
1321 * error earlier in this function can be
1322 * removed. What is required here is to shuffle
1323 * the voistat array such that the new stats for
1324 * the voi are contiguous, which will displace
1325 * stats for other vois that reside after the
1326 * voi being updated. The other vois then need
1327 * to have their stats_off adjusted post
1328 * shuffle.
1329 */
1330 }
1331
1332 voi->voistatmaxid = newvoistatmaxid;
1333 newstatdataidx = 0;
1334
1335 if (voi->flags & VOI_REQSTATE) {
1336 /* Initialise the voistate stat in slot 0. */
1337 tmpstat = BLOB_OFFSET(tpl_sb, voi->stats_off);
1338 tmpstat->stype = VS_STYPE_VOISTATE;
1339 tmpstat->flags = 0;
1340 tmpstat->dtype = VSD_DTYPE_VOISTATE;
1341 newstatdataidx = tmpstat->dsz =
1342 sizeof(struct voistatdata_numeric);
1343 tmpstat->data_off = tpl_sb->statsdata_off;
1344 }
1345
1346 for (i = 0; (uint32_t)i < nvss; i++) {
1347 tmpstat = BLOB_OFFSET(tpl_sb, voi->stats_off +
1348 (vss[i].stype * sizeof(struct voistat)));
1349 KASSERT(tmpstat->stype < 0, ("voistat %p "
1350 "already initialised", tmpstat));
1351 tmpstat->stype = vss[i].stype;
1352 tmpstat->flags = vss[i].flags;
1353 tmpstat->dtype = vss[i].vs_dtype;
1354 tmpstat->dsz = vss[i].vsdsz;
1355 tmpstat->data_off = tpl_sb->statsdata_off +
1356 newstatdataidx;
1357 memcpy(BLOB_OFFSET(tpl_sb, tmpstat->data_off),
1358 vss[i].iv, vss[i].vsdsz);
1359 newstatdataidx += vss[i].vsdsz;
1360 }
1361
1362 /* Update the template version hash. */
1363 stats_tpl_update_hash(tpllist[tpl_id]);
1364 /* XXXLAS: Confirm tpl name/hash pair remains unique. */
1365 }
1366 } else
1367 error = EINVAL;
1368 TPL_LIST_WUNLOCK();
1369
1370 return (error);
1371 }
1372
1373 struct statsblobv1 *
1374 stats_v1_blob_alloc(uint32_t tpl_id, uint32_t flags __unused)
1375 {
1376 struct statsblobv1 *sb;
1377 int error;
1378
1379 sb = NULL;
1380
1381 TPL_LIST_RLOCK();
1382 if (tpl_id < ntpl) {
1383 sb = stats_realloc(NULL, 0, tpllist[tpl_id]->sb->maxsz, 0);
1384 if (sb != NULL) {
1385 sb->maxsz = tpllist[tpl_id]->sb->maxsz;
1386 error = stats_v1_blob_init_locked(sb, tpl_id, 0);
1387 } else
1388 error = ENOMEM;
1389
1390 if (error) {
1391 stats_free(sb);
1392 sb = NULL;
1393 }
1394 }
1395 TPL_LIST_RUNLOCK();
1396
1397 return (sb);
1398 }
1399
1400 void
1401 stats_v1_blob_destroy(struct statsblobv1 *sb)
1402 {
1403
1404 stats_free(sb);
1405 }
1406
1407 int
1408 stats_v1_voistat_fetch_dptr(struct statsblobv1 *sb, int32_t voi_id,
1409 enum voi_stype stype, enum vsd_dtype *retdtype, struct voistatdata **retvsd,
1410 size_t *retvsdsz)
1411 {
1412 struct voi *v;
1413 struct voistat *vs;
1414
1415 if (retvsd == NULL || sb == NULL || sb->abi != STATS_ABI_V1 ||
1416 voi_id >= NVOIS(sb))
1417 return (EINVAL);
1418
1419 v = &sb->vois[voi_id];
1420 if ((__typeof(v->voistatmaxid))stype > v->voistatmaxid)
1421 return (EINVAL);
1422
1423 vs = BLOB_OFFSET(sb, v->stats_off + (stype * sizeof(struct voistat)));
1424 *retvsd = BLOB_OFFSET(sb, vs->data_off);
1425 if (retdtype != NULL)
1426 *retdtype = vs->dtype;
1427 if (retvsdsz != NULL)
1428 *retvsdsz = vs->dsz;
1429
1430 return (0);
1431 }
1432
1433 int
1434 stats_v1_blob_init(struct statsblobv1 *sb, uint32_t tpl_id, uint32_t flags)
1435 {
1436 int error;
1437
1438 error = 0;
1439
1440 TPL_LIST_RLOCK();
1441 if (sb == NULL || tpl_id >= ntpl) {
1442 error = EINVAL;
1443 } else {
1444 error = stats_v1_blob_init_locked(sb, tpl_id, flags);
1445 }
1446 TPL_LIST_RUNLOCK();
1447
1448 return (error);
1449 }
1450
1451 static inline int
1452 stats_v1_blob_init_locked(struct statsblobv1 *sb, uint32_t tpl_id,
1453 uint32_t flags __unused)
1454 {
1455 int error;
1456
1457 TPL_LIST_RLOCK_ASSERT();
1458 error = (sb->maxsz >= tpllist[tpl_id]->sb->cursz) ? 0 : EOVERFLOW;
1459 KASSERT(!error,
1460 ("sb %d instead of %d bytes", sb->maxsz, tpllist[tpl_id]->sb->cursz));
1461
1462 if (!error) {
1463 memcpy(sb, tpllist[tpl_id]->sb, tpllist[tpl_id]->sb->cursz);
1464 sb->created = sb->lastrst = stats_sbinuptime();
1465 sb->tplhash = tpllist[tpl_id]->mb->tplhash;
1466 }
1467
1468 return (error);
1469 }
1470
1471 static int
1472 stats_v1_blob_expand(struct statsblobv1 **sbpp, int newvoibytes,
1473 int newvoistatbytes, int newvoistatdatabytes)
1474 {
1475 struct statsblobv1 *sb;
1476 struct voi *tmpvoi;
1477 struct voistat *tmpvoistat, *voistat_array;
1478 int error, i, idxnewvois, idxnewvoistats, nbytes, nvoistats;
1479
1480 KASSERT(newvoibytes % sizeof(struct voi) == 0,
1481 ("Bad newvoibytes %d", newvoibytes));
1482 KASSERT(newvoistatbytes % sizeof(struct voistat) == 0,
1483 ("Bad newvoistatbytes %d", newvoistatbytes));
1484
1485 error = ((newvoibytes % sizeof(struct voi) == 0) &&
1486 (newvoistatbytes % sizeof(struct voistat) == 0)) ? 0 : EINVAL;
1487 sb = *sbpp;
1488 nbytes = newvoibytes + newvoistatbytes + newvoistatdatabytes;
1489
1490 /*
1491 * XXXLAS: Required until we gain support for flags which alter the
1492 * units of size/offset fields in key structs.
1493 */
1494 if (!error && ((((int)sb->cursz) + nbytes) > SB_V1_MAXSZ))
1495 error = EFBIG;
1496
1497 if (!error && (sb->cursz + nbytes > sb->maxsz)) {
1498 /* Need to expand our blob. */
1499 sb = stats_realloc(sb, sb->maxsz, sb->cursz + nbytes, M_ZERO);
1500 if (sb != NULL) {
1501 sb->maxsz = sb->cursz + nbytes;
1502 *sbpp = sb;
1503 } else
1504 error = ENOMEM;
1505 }
1506
1507 if (!error) {
1508 /*
1509 * Shuffle memory within the expanded blob working from the end
1510 * backwards, leaving gaps for the new voistat and voistatdata
1511 * structs at the beginning of their respective blob regions,
1512 * and for the new voi structs at the end of their blob region.
1513 */
1514 memmove(BLOB_OFFSET(sb, sb->statsdata_off + nbytes),
1515 BLOB_OFFSET(sb, sb->statsdata_off),
1516 sb->cursz - sb->statsdata_off);
1517 memmove(BLOB_OFFSET(sb, sb->stats_off + newvoibytes +
1518 newvoistatbytes), BLOB_OFFSET(sb, sb->stats_off),
1519 sb->statsdata_off - sb->stats_off);
1520
1521 /* First index of new voi/voistat structs to be initialised. */
1522 idxnewvois = NVOIS(sb);
1523 idxnewvoistats = (newvoistatbytes / sizeof(struct voistat)) - 1;
1524
1525 /* Update housekeeping variables and offsets. */
1526 sb->cursz += nbytes;
1527 sb->stats_off += newvoibytes;
1528 sb->statsdata_off += newvoibytes + newvoistatbytes;
1529
1530 /* XXXLAS: Zeroing not strictly needed but aids debugging. */
1531 memset(&sb->vois[idxnewvois], '\0', newvoibytes);
1532 memset(BLOB_OFFSET(sb, sb->stats_off), '\0',
1533 newvoistatbytes);
1534 memset(BLOB_OFFSET(sb, sb->statsdata_off), '\0',
1535 newvoistatdatabytes);
1536
1537 /* Initialise new voi array members and update offsets. */
1538 for (i = 0; i < NVOIS(sb); i++) {
1539 tmpvoi = &sb->vois[i];
1540 if (i >= idxnewvois) {
1541 tmpvoi->id = tmpvoi->voistatmaxid = -1;
1542 } else if (tmpvoi->id > -1) {
1543 tmpvoi->stats_off += newvoibytes +
1544 newvoistatbytes;
1545 }
1546 }
1547
1548 /* Initialise new voistat array members and update offsets. */
1549 nvoistats = (sb->statsdata_off - sb->stats_off) /
1550 sizeof(struct voistat);
1551 voistat_array = BLOB_OFFSET(sb, sb->stats_off);
1552 for (i = 0; i < nvoistats; i++) {
1553 tmpvoistat = &voistat_array[i];
1554 if (i <= idxnewvoistats) {
1555 tmpvoistat->stype = -1;
1556 } else if (tmpvoistat->stype > -1) {
1557 tmpvoistat->data_off += nbytes;
1558 }
1559 }
1560 }
1561
1562 return (error);
1563 }
1564
1565 static void
1566 stats_v1_blob_finalise(struct statsblobv1 *sb __unused)
1567 {
1568
1569 /* XXXLAS: Fill this in. */
1570 }
1571
1572 static void
1573 stats_v1_blob_iter(struct statsblobv1 *sb, stats_v1_blob_itercb_t icb,
1574 void *usrctx, uint32_t flags)
1575 {
1576 struct voi *v;
1577 struct voistat *vs;
1578 struct sb_iter_ctx ctx;
1579 int i, j, firstvoi;
1580
1581 ctx.usrctx = usrctx;
1582 ctx.flags = SB_IT_FIRST_CB;
1583 firstvoi = 1;
1584
1585 for (i = 0; i < NVOIS(sb); i++) {
1586 v = &sb->vois[i];
1587 ctx.vslot = i;
1588 ctx.vsslot = -1;
1589 ctx.flags |= SB_IT_FIRST_VOISTAT;
1590
1591 if (firstvoi)
1592 ctx.flags |= SB_IT_FIRST_VOI;
1593 else if (i == (NVOIS(sb) - 1))
1594 ctx.flags |= SB_IT_LAST_VOI | SB_IT_LAST_CB;
1595
1596 if (v->id < 0 && (flags & SB_IT_NULLVOI)) {
1597 if (icb(sb, v, NULL, &ctx))
1598 return;
1599 firstvoi = 0;
1600 ctx.flags &= ~SB_IT_FIRST_CB;
1601 }
1602
1603 /* If NULL voi, v->voistatmaxid == -1 */
1604 for (j = 0; j <= v->voistatmaxid; j++) {
1605 vs = &((struct voistat *)BLOB_OFFSET(sb,
1606 v->stats_off))[j];
1607 if (vs->stype < 0 &&
1608 !(flags & SB_IT_NULLVOISTAT))
1609 continue;
1610
1611 if (j == v->voistatmaxid) {
1612 ctx.flags |= SB_IT_LAST_VOISTAT;
1613 if (i == (NVOIS(sb) - 1))
1614 ctx.flags |=
1615 SB_IT_LAST_CB;
1616 } else
1617 ctx.flags &= ~SB_IT_LAST_CB;
1618
1619 ctx.vsslot = j;
1620 if (icb(sb, v, vs, &ctx))
1621 return;
1622
1623 ctx.flags &= ~(SB_IT_FIRST_CB | SB_IT_FIRST_VOISTAT |
1624 SB_IT_LAST_VOISTAT);
1625 }
1626 ctx.flags &= ~(SB_IT_FIRST_VOI | SB_IT_LAST_VOI);
1627 }
1628 }
1629
1630 static inline void
1631 stats_voistatdata_tdgst_tostr(enum vsd_dtype voi_dtype __unused,
1632 const struct voistatdata_tdgst *tdgst, enum vsd_dtype tdgst_dtype,
1633 size_t tdgst_dsz __unused, enum sb_str_fmt fmt, struct sbuf *buf, int objdump)
1634 {
1635 const struct ctdth32 *ctd32tree;
1636 const struct ctdth64 *ctd64tree;
1637 const struct voistatdata_tdgstctd32 *ctd32;
1638 const struct voistatdata_tdgstctd64 *ctd64;
1639 const char *fmtstr;
1640 uint64_t smplcnt, compcnt;
1641 int is32bit, qmaxstrlen;
1642 uint16_t maxctds, curctds;
1643
1644 switch (tdgst_dtype) {
1645 case VSD_DTYPE_TDGSTCLUST32:
1646 smplcnt = CONSTVSD(tdgstclust32, tdgst)->smplcnt;
1647 compcnt = CONSTVSD(tdgstclust32, tdgst)->compcnt;
1648 maxctds = ARB_MAXNODES(&CONSTVSD(tdgstclust32, tdgst)->ctdtree);
1649 curctds = ARB_CURNODES(&CONSTVSD(tdgstclust32, tdgst)->ctdtree);
1650 ctd32tree = &CONSTVSD(tdgstclust32, tdgst)->ctdtree;
1651 ctd32 = (objdump ? ARB_CNODE(ctd32tree, 0) :
1652 ARB_CMIN(ctdth32, ctd32tree));
1653 qmaxstrlen = (ctd32 == NULL) ? 1 : Q_MAXSTRLEN(ctd32->mu, 10);
1654 is32bit = 1;
1655 ctd64tree = NULL;
1656 ctd64 = NULL;
1657 break;
1658 case VSD_DTYPE_TDGSTCLUST64:
1659 smplcnt = CONSTVSD(tdgstclust64, tdgst)->smplcnt;
1660 compcnt = CONSTVSD(tdgstclust64, tdgst)->compcnt;
1661 maxctds = ARB_MAXNODES(&CONSTVSD(tdgstclust64, tdgst)->ctdtree);
1662 curctds = ARB_CURNODES(&CONSTVSD(tdgstclust64, tdgst)->ctdtree);
1663 ctd64tree = &CONSTVSD(tdgstclust64, tdgst)->ctdtree;
1664 ctd64 = (objdump ? ARB_CNODE(ctd64tree, 0) :
1665 ARB_CMIN(ctdth64, ctd64tree));
1666 qmaxstrlen = (ctd64 == NULL) ? 1 : Q_MAXSTRLEN(ctd64->mu, 10);
1667 is32bit = 0;
1668 ctd32tree = NULL;
1669 ctd32 = NULL;
1670 break;
1671 default:
1672 return;
1673 }
1674
1675 switch (fmt) {
1676 case SB_STRFMT_FREEFORM:
1677 fmtstr = "smplcnt=%ju, compcnt=%ju, maxctds=%hu, nctds=%hu";
1678 break;
1679 case SB_STRFMT_JSON:
1680 default:
1681 fmtstr =
1682 "\"smplcnt\":%ju,\"compcnt\":%ju,\"maxctds\":%hu,"
1683 "\"nctds\":%hu,\"ctds\":[";
1684 break;
1685 }
1686 sbuf_printf(buf, fmtstr, (uintmax_t)smplcnt, (uintmax_t)compcnt,
1687 maxctds, curctds);
1688
1689 while ((is32bit ? NULL != ctd32 : NULL != ctd64)) {
1690 char qstr[qmaxstrlen];
1691
1692 switch (fmt) {
1693 case SB_STRFMT_FREEFORM:
1694 fmtstr = "\n\t\t\t\t";
1695 break;
1696 case SB_STRFMT_JSON:
1697 default:
1698 fmtstr = "{";
1699 break;
1700 }
1701 sbuf_cat(buf, fmtstr);
1702
1703 if (objdump) {
1704 switch (fmt) {
1705 case SB_STRFMT_FREEFORM:
1706 fmtstr = "ctd[%hu].";
1707 break;
1708 case SB_STRFMT_JSON:
1709 default:
1710 fmtstr = "\"ctd\":%hu,";
1711 break;
1712 }
1713 sbuf_printf(buf, fmtstr, is32bit ?
1714 ARB_SELFIDX(ctd32tree, ctd32) :
1715 ARB_SELFIDX(ctd64tree, ctd64));
1716 }
1717
1718 switch (fmt) {
1719 case SB_STRFMT_FREEFORM:
1720 fmtstr = "{mu=";
1721 break;
1722 case SB_STRFMT_JSON:
1723 default:
1724 fmtstr = "\"mu\":";
1725 break;
1726 }
1727 sbuf_cat(buf, fmtstr);
1728 Q_TOSTR((is32bit ? ctd32->mu : ctd64->mu), -1, 10, qstr,
1729 sizeof(qstr));
1730 sbuf_cat(buf, qstr);
1731
1732 switch (fmt) {
1733 case SB_STRFMT_FREEFORM:
1734 fmtstr = is32bit ? ",cnt=%u}" : ",cnt=%ju}";
1735 break;
1736 case SB_STRFMT_JSON:
1737 default:
1738 fmtstr = is32bit ? ",\"cnt\":%u}" : ",\"cnt\":%ju}";
1739 break;
1740 }
1741 sbuf_printf(buf, fmtstr,
1742 is32bit ? ctd32->cnt : (uintmax_t)ctd64->cnt);
1743
1744 if (is32bit)
1745 ctd32 = (objdump ? ARB_CNODE(ctd32tree,
1746 ARB_SELFIDX(ctd32tree, ctd32) + 1) :
1747 ARB_CNEXT(ctdth32, ctd32tree, ctd32));
1748 else
1749 ctd64 = (objdump ? ARB_CNODE(ctd64tree,
1750 ARB_SELFIDX(ctd64tree, ctd64) + 1) :
1751 ARB_CNEXT(ctdth64, ctd64tree, ctd64));
1752
1753 if (fmt == SB_STRFMT_JSON &&
1754 (is32bit ? NULL != ctd32 : NULL != ctd64))
1755 sbuf_putc(buf, ',');
1756 }
1757 if (fmt == SB_STRFMT_JSON)
1758 sbuf_cat(buf, "]");
1759 }
1760
1761 static inline void
1762 stats_voistatdata_hist_tostr(enum vsd_dtype voi_dtype,
1763 const struct voistatdata_hist *hist, enum vsd_dtype hist_dtype,
1764 size_t hist_dsz, enum sb_str_fmt fmt, struct sbuf *buf, int objdump)
1765 {
1766 const struct voistatdata_numeric *bkt_lb, *bkt_ub;
1767 const char *fmtstr;
1768 int is32bit;
1769 uint16_t i, nbkts;
1770
1771 switch (hist_dtype) {
1772 case VSD_DTYPE_CRHIST32:
1773 nbkts = HIST_VSDSZ2NBKTS(crhist32, hist_dsz);
1774 is32bit = 1;
1775 break;
1776 case VSD_DTYPE_DRHIST32:
1777 nbkts = HIST_VSDSZ2NBKTS(drhist32, hist_dsz);
1778 is32bit = 1;
1779 break;
1780 case VSD_DTYPE_DVHIST32:
1781 nbkts = HIST_VSDSZ2NBKTS(dvhist32, hist_dsz);
1782 is32bit = 1;
1783 break;
1784 case VSD_DTYPE_CRHIST64:
1785 nbkts = HIST_VSDSZ2NBKTS(crhist64, hist_dsz);
1786 is32bit = 0;
1787 break;
1788 case VSD_DTYPE_DRHIST64:
1789 nbkts = HIST_VSDSZ2NBKTS(drhist64, hist_dsz);
1790 is32bit = 0;
1791 break;
1792 case VSD_DTYPE_DVHIST64:
1793 nbkts = HIST_VSDSZ2NBKTS(dvhist64, hist_dsz);
1794 is32bit = 0;
1795 break;
1796 default:
1797 return;
1798 }
1799
1800 switch (fmt) {
1801 case SB_STRFMT_FREEFORM:
1802 fmtstr = "nbkts=%hu, ";
1803 break;
1804 case SB_STRFMT_JSON:
1805 default:
1806 fmtstr = "\"nbkts\":%hu,";
1807 break;
1808 }
1809 sbuf_printf(buf, fmtstr, nbkts);
1810
1811 switch (fmt) {
1812 case SB_STRFMT_FREEFORM:
1813 fmtstr = (is32bit ? "oob=%u" : "oob=%ju");
1814 break;
1815 case SB_STRFMT_JSON:
1816 default:
1817 fmtstr = (is32bit ? "\"oob\":%u,\"bkts\":[" :
1818 "\"oob\":%ju,\"bkts\":[");
1819 break;
1820 }
1821 sbuf_printf(buf, fmtstr, is32bit ? VSD_CONSTHIST_FIELDVAL(hist,
1822 hist_dtype, oob) : (uintmax_t)VSD_CONSTHIST_FIELDVAL(hist,
1823 hist_dtype, oob));
1824
1825 for (i = 0; i < nbkts; i++) {
1826 switch (hist_dtype) {
1827 case VSD_DTYPE_CRHIST32:
1828 case VSD_DTYPE_CRHIST64:
1829 bkt_lb = VSD_CONSTCRHIST_FIELDPTR(hist, hist_dtype,
1830 bkts[i].lb);
1831 if (i < nbkts - 1)
1832 bkt_ub = VSD_CONSTCRHIST_FIELDPTR(hist,
1833 hist_dtype, bkts[i + 1].lb);
1834 else
1835 bkt_ub = &numeric_limits[LIM_MAX][voi_dtype];
1836 break;
1837 case VSD_DTYPE_DRHIST32:
1838 case VSD_DTYPE_DRHIST64:
1839 bkt_lb = VSD_CONSTDRHIST_FIELDPTR(hist, hist_dtype,
1840 bkts[i].lb);
1841 bkt_ub = VSD_CONSTDRHIST_FIELDPTR(hist, hist_dtype,
1842 bkts[i].ub);
1843 break;
1844 case VSD_DTYPE_DVHIST32:
1845 case VSD_DTYPE_DVHIST64:
1846 bkt_lb = bkt_ub = VSD_CONSTDVHIST_FIELDPTR(hist,
1847 hist_dtype, bkts[i].val);
1848 break;
1849 default:
1850 break;
1851 }
1852
1853 switch (fmt) {
1854 case SB_STRFMT_FREEFORM:
1855 fmtstr = "\n\t\t\t\t";
1856 break;
1857 case SB_STRFMT_JSON:
1858 default:
1859 fmtstr = "{";
1860 break;
1861 }
1862 sbuf_cat(buf, fmtstr);
1863
1864 if (objdump) {
1865 switch (fmt) {
1866 case SB_STRFMT_FREEFORM:
1867 fmtstr = "bkt[%hu].";
1868 break;
1869 case SB_STRFMT_JSON:
1870 default:
1871 fmtstr = "\"bkt\":%hu,";
1872 break;
1873 }
1874 sbuf_printf(buf, fmtstr, i);
1875 }
1876
1877 switch (fmt) {
1878 case SB_STRFMT_FREEFORM:
1879 fmtstr = "{lb=";
1880 break;
1881 case SB_STRFMT_JSON:
1882 default:
1883 fmtstr = "\"lb\":";
1884 break;
1885 }
1886 sbuf_cat(buf, fmtstr);
1887 stats_voistatdata_tostr((const struct voistatdata *)bkt_lb,
1888 voi_dtype, voi_dtype, sizeof(struct voistatdata_numeric),
1889 fmt, buf, objdump);
1890
1891 switch (fmt) {
1892 case SB_STRFMT_FREEFORM:
1893 fmtstr = ",ub=";
1894 break;
1895 case SB_STRFMT_JSON:
1896 default:
1897 fmtstr = ",\"ub\":";
1898 break;
1899 }
1900 sbuf_cat(buf, fmtstr);
1901 stats_voistatdata_tostr((const struct voistatdata *)bkt_ub,
1902 voi_dtype, voi_dtype, sizeof(struct voistatdata_numeric),
1903 fmt, buf, objdump);
1904
1905 switch (fmt) {
1906 case SB_STRFMT_FREEFORM:
1907 fmtstr = is32bit ? ",cnt=%u}" : ",cnt=%ju}";
1908 break;
1909 case SB_STRFMT_JSON:
1910 default:
1911 fmtstr = is32bit ? ",\"cnt\":%u}" : ",\"cnt\":%ju}";
1912 break;
1913 }
1914 sbuf_printf(buf, fmtstr, is32bit ?
1915 VSD_CONSTHIST_FIELDVAL(hist, hist_dtype, bkts[i].cnt) :
1916 (uintmax_t)VSD_CONSTHIST_FIELDVAL(hist, hist_dtype,
1917 bkts[i].cnt));
1918
1919 if (fmt == SB_STRFMT_JSON && i < nbkts - 1)
1920 sbuf_putc(buf, ',');
1921 }
1922 if (fmt == SB_STRFMT_JSON)
1923 sbuf_cat(buf, "]");
1924 }
1925
1926 int
1927 stats_voistatdata_tostr(const struct voistatdata *vsd, enum vsd_dtype voi_dtype,
1928 enum vsd_dtype vsd_dtype, size_t vsd_sz, enum sb_str_fmt fmt,
1929 struct sbuf *buf, int objdump)
1930 {
1931 const char *fmtstr;
1932
1933 if (vsd == NULL || buf == NULL || voi_dtype >= VSD_NUM_DTYPES ||
1934 vsd_dtype >= VSD_NUM_DTYPES || fmt >= SB_STRFMT_NUM_FMTS)
1935 return (EINVAL);
1936
1937 switch (vsd_dtype) {
1938 case VSD_DTYPE_VOISTATE:
1939 switch (fmt) {
1940 case SB_STRFMT_FREEFORM:
1941 fmtstr = "prev=";
1942 break;
1943 case SB_STRFMT_JSON:
1944 default:
1945 fmtstr = "\"prev\":";
1946 break;
1947 }
1948 sbuf_cat(buf, fmtstr);
1949 /*
1950 * Render prev by passing it as *vsd and voi_dtype as vsd_dtype.
1951 */
1952 stats_voistatdata_tostr(
1953 (const struct voistatdata *)&CONSTVSD(voistate, vsd)->prev,
1954 voi_dtype, voi_dtype, vsd_sz, fmt, buf, objdump);
1955 break;
1956 case VSD_DTYPE_INT_S32:
1957 sbuf_printf(buf, "%d", vsd->int32.s32);
1958 break;
1959 case VSD_DTYPE_INT_U32:
1960 sbuf_printf(buf, "%u", vsd->int32.u32);
1961 break;
1962 case VSD_DTYPE_INT_S64:
1963 sbuf_printf(buf, "%jd", (intmax_t)vsd->int64.s64);
1964 break;
1965 case VSD_DTYPE_INT_U64:
1966 sbuf_printf(buf, "%ju", (uintmax_t)vsd->int64.u64);
1967 break;
1968 case VSD_DTYPE_INT_SLONG:
1969 sbuf_printf(buf, "%ld", vsd->intlong.slong);
1970 break;
1971 case VSD_DTYPE_INT_ULONG:
1972 sbuf_printf(buf, "%lu", vsd->intlong.ulong);
1973 break;
1974 case VSD_DTYPE_Q_S32:
1975 {
1976 char qstr[Q_MAXSTRLEN(vsd->q32.sq32, 10)];
1977 Q_TOSTR((s32q_t)vsd->q32.sq32, -1, 10, qstr, sizeof(qstr));
1978 sbuf_cat(buf, qstr);
1979 }
1980 break;
1981 case VSD_DTYPE_Q_U32:
1982 {
1983 char qstr[Q_MAXSTRLEN(vsd->q32.uq32, 10)];
1984 Q_TOSTR((u32q_t)vsd->q32.uq32, -1, 10, qstr, sizeof(qstr));
1985 sbuf_cat(buf, qstr);
1986 }
1987 break;
1988 case VSD_DTYPE_Q_S64:
1989 {
1990 char qstr[Q_MAXSTRLEN(vsd->q64.sq64, 10)];
1991 Q_TOSTR((s64q_t)vsd->q64.sq64, -1, 10, qstr, sizeof(qstr));
1992 sbuf_cat(buf, qstr);
1993 }
1994 break;
1995 case VSD_DTYPE_Q_U64:
1996 {
1997 char qstr[Q_MAXSTRLEN(vsd->q64.uq64, 10)];
1998 Q_TOSTR((u64q_t)vsd->q64.uq64, -1, 10, qstr, sizeof(qstr));
1999 sbuf_cat(buf, qstr);
2000 }
2001 break;
2002 case VSD_DTYPE_CRHIST32:
2003 case VSD_DTYPE_DRHIST32:
2004 case VSD_DTYPE_DVHIST32:
2005 case VSD_DTYPE_CRHIST64:
2006 case VSD_DTYPE_DRHIST64:
2007 case VSD_DTYPE_DVHIST64:
2008 stats_voistatdata_hist_tostr(voi_dtype, CONSTVSD(hist, vsd),
2009 vsd_dtype, vsd_sz, fmt, buf, objdump);
2010 break;
2011 case VSD_DTYPE_TDGSTCLUST32:
2012 case VSD_DTYPE_TDGSTCLUST64:
2013 stats_voistatdata_tdgst_tostr(voi_dtype,
2014 CONSTVSD(tdgst, vsd), vsd_dtype, vsd_sz, fmt, buf,
2015 objdump);
2016 break;
2017 default:
2018 break;
2019 }
2020
2021 return (sbuf_error(buf));
2022 }
2023
2024 static void
2025 stats_v1_itercb_tostr_freeform(struct statsblobv1 *sb, struct voi *v,
2026 struct voistat *vs, struct sb_iter_ctx *ctx)
2027 {
2028 struct sb_tostrcb_ctx *sctx;
2029 struct metablob *tpl_mb;
2030 struct sbuf *buf;
2031 void *vsd;
2032 uint8_t dump;
2033
2034 sctx = ctx->usrctx;
2035 buf = sctx->buf;
2036 tpl_mb = sctx->tpl ? sctx->tpl->mb : NULL;
2037 dump = ((sctx->flags & SB_TOSTR_OBJDUMP) != 0);
2038
2039 if (ctx->flags & SB_IT_FIRST_CB) {
2040 sbuf_printf(buf, "struct statsblobv1@%p", sb);
2041 if (dump) {
2042 sbuf_printf(buf, ", abi=%hhu, endian=%hhu, maxsz=%hu, "
2043 "cursz=%hu, created=%jd, lastrst=%jd, flags=0x%04hx, "
2044 "stats_off=%hu, statsdata_off=%hu",
2045 sb->abi, sb->endian, sb->maxsz, sb->cursz,
2046 sb->created, sb->lastrst, sb->flags, sb->stats_off,
2047 sb->statsdata_off);
2048 }
2049 sbuf_printf(buf, ", tplhash=%u", sb->tplhash);
2050 }
2051
2052 if (ctx->flags & SB_IT_FIRST_VOISTAT) {
2053 sbuf_printf(buf, "\n\tvois[%hd]: id=%hd", ctx->vslot, v->id);
2054 if (v->id < 0)
2055 return;
2056 sbuf_printf(buf, ", name=\"%s\"", (tpl_mb == NULL) ? "" :
2057 tpl_mb->voi_meta[v->id].name);
2058 if (dump)
2059 sbuf_printf(buf, ", flags=0x%04hx, dtype=%s, "
2060 "voistatmaxid=%hhd, stats_off=%hu", v->flags,
2061 vsd_dtype2name[v->dtype], v->voistatmaxid, v->stats_off);
2062 }
2063
2064 if (!dump && vs->stype <= 0)
2065 return;
2066
2067 sbuf_printf(buf, "\n\t\tvois[%hd]stat[%hhd]: stype=", v->id, ctx->vsslot);
2068 if (vs->stype < 0) {
2069 sbuf_printf(buf, "%hhd", vs->stype);
2070 return;
2071 } else
2072 sbuf_printf(buf, "%s, errs=%hu", vs_stype2name[vs->stype],
2073 vs->errs);
2074 vsd = BLOB_OFFSET(sb, vs->data_off);
2075 if (dump)
2076 sbuf_printf(buf, ", flags=0x%04x, dtype=%s, dsz=%hu, "
2077 "data_off=%hu", vs->flags, vsd_dtype2name[vs->dtype],
2078 vs->dsz, vs->data_off);
2079
2080 sbuf_printf(buf, "\n\t\t\tvoistatdata: ");
2081 stats_voistatdata_tostr(vsd, v->dtype, vs->dtype, vs->dsz,
2082 sctx->fmt, buf, dump);
2083 }
2084
2085 static void
2086 stats_v1_itercb_tostr_json(struct statsblobv1 *sb, struct voi *v, struct voistat *vs,
2087 struct sb_iter_ctx *ctx)
2088 {
2089 struct sb_tostrcb_ctx *sctx;
2090 struct metablob *tpl_mb;
2091 struct sbuf *buf;
2092 const char *fmtstr;
2093 void *vsd;
2094 uint8_t dump;
2095
2096 sctx = ctx->usrctx;
2097 buf = sctx->buf;
2098 tpl_mb = sctx->tpl ? sctx->tpl->mb : NULL;
2099 dump = ((sctx->flags & SB_TOSTR_OBJDUMP) != 0);
2100
2101 if (ctx->flags & SB_IT_FIRST_CB) {
2102 sbuf_putc(buf, '{');
2103 if (dump) {
2104 sbuf_printf(buf, "\"abi\":%hhu,\"endian\":%hhu,"
2105 "\"maxsz\":%hu,\"cursz\":%hu,\"created\":%jd,"
2106 "\"lastrst\":%jd,\"flags\":%hu,\"stats_off\":%hu,"
2107 "\"statsdata_off\":%hu,", sb->abi,
2108 sb->endian, sb->maxsz, sb->cursz, sb->created,
2109 sb->lastrst, sb->flags, sb->stats_off,
2110 sb->statsdata_off);
2111 }
2112
2113 if (tpl_mb == NULL)
2114 fmtstr = "\"tplname\":%s,\"tplhash\":%u,\"vois\":{";
2115 else
2116 fmtstr = "\"tplname\":\"%s\",\"tplhash\":%u,\"vois\":{";
2117
2118 sbuf_printf(buf, fmtstr, tpl_mb ? tpl_mb->tplname : "null",
2119 sb->tplhash);
2120 }
2121
2122 if (ctx->flags & SB_IT_FIRST_VOISTAT) {
2123 if (dump) {
2124 sbuf_printf(buf, "\"[%d]\":{\"id\":%d", ctx->vslot,
2125 v->id);
2126 if (v->id < 0) {
2127 sbuf_printf(buf, "},");
2128 return;
2129 }
2130
2131 if (tpl_mb == NULL)
2132 fmtstr = ",\"name\":%s,\"flags\":%hu,"
2133 "\"dtype\":\"%s\",\"voistatmaxid\":%hhd,"
2134 "\"stats_off\":%hu,";
2135 else
2136 fmtstr = ",\"name\":\"%s\",\"flags\":%hu,"
2137 "\"dtype\":\"%s\",\"voistatmaxid\":%hhd,"
2138 "\"stats_off\":%hu,";
2139
2140 sbuf_printf(buf, fmtstr, tpl_mb ?
2141 tpl_mb->voi_meta[v->id].name : "null", v->flags,
2142 vsd_dtype2name[v->dtype], v->voistatmaxid,
2143 v->stats_off);
2144 } else {
2145 if (tpl_mb == NULL) {
2146 sbuf_printf(buf, "\"[%hd]\":{", v->id);
2147 } else {
2148 sbuf_printf(buf, "\"%s\":{",
2149 tpl_mb->voi_meta[v->id].name);
2150 }
2151 }
2152 sbuf_cat(buf, "\"stats\":{");
2153 }
2154
2155 vsd = BLOB_OFFSET(sb, vs->data_off);
2156 if (dump) {
2157 sbuf_printf(buf, "\"[%hhd]\":", ctx->vsslot);
2158 if (vs->stype < 0) {
2159 sbuf_printf(buf, "{\"stype\":-1},");
2160 return;
2161 }
2162 sbuf_printf(buf, "{\"stype\":\"%s\",\"errs\":%hu,\"flags\":%hu,"
2163 "\"dtype\":\"%s\",\"data_off\":%hu,\"voistatdata\":{",
2164 vs_stype2name[vs->stype], vs->errs, vs->flags,
2165 vsd_dtype2name[vs->dtype], vs->data_off);
2166 } else if (vs->stype > 0) {
2167 if (tpl_mb == NULL)
2168 sbuf_printf(buf, "\"[%hhd]\":", vs->stype);
2169 else
2170 sbuf_printf(buf, "\"%s\":", vs_stype2name[vs->stype]);
2171 } else
2172 return;
2173
2174 if ((vs->flags & VS_VSDVALID) || dump) {
2175 if (!dump)
2176 sbuf_printf(buf, "{\"errs\":%hu,", vs->errs);
2177 /* Simple non-compound VSD types need a key. */
2178 if (!vsd_compoundtype[vs->dtype])
2179 sbuf_cat(buf, "\"val\":");
2180 stats_voistatdata_tostr(vsd, v->dtype, vs->dtype, vs->dsz,
2181 sctx->fmt, buf, dump);
2182 sbuf_cat(buf, dump ? "}}" : "}");
2183 } else
2184 sbuf_cat(buf, dump ? "null}" : "null");
2185
2186 if (ctx->flags & SB_IT_LAST_VOISTAT)
2187 sbuf_cat(buf, "}}");
2188
2189 if (ctx->flags & SB_IT_LAST_CB)
2190 sbuf_cat(buf, "}}");
2191 else
2192 sbuf_putc(buf, ',');
2193 }
2194
2195 static int
2196 stats_v1_itercb_tostr(struct statsblobv1 *sb, struct voi *v, struct voistat *vs,
2197 struct sb_iter_ctx *ctx)
2198 {
2199 struct sb_tostrcb_ctx *sctx;
2200
2201 sctx = ctx->usrctx;
2202
2203 switch (sctx->fmt) {
2204 case SB_STRFMT_FREEFORM:
2205 stats_v1_itercb_tostr_freeform(sb, v, vs, ctx);
2206 break;
2207 case SB_STRFMT_JSON:
2208 stats_v1_itercb_tostr_json(sb, v, vs, ctx);
2209 break;
2210 default:
2211 break;
2212 }
2213
2214 return (sbuf_error(sctx->buf));
2215 }
2216
2217 int
2218 stats_v1_blob_tostr(struct statsblobv1 *sb, struct sbuf *buf,
2219 enum sb_str_fmt fmt, uint32_t flags)
2220 {
2221 struct sb_tostrcb_ctx sctx;
2222 uint32_t iflags;
2223
2224 if (sb == NULL || sb->abi != STATS_ABI_V1 || buf == NULL ||
2225 fmt >= SB_STRFMT_NUM_FMTS)
2226 return (EINVAL);
2227
2228 sctx.buf = buf;
2229 sctx.fmt = fmt;
2230 sctx.flags = flags;
2231
2232 if (flags & SB_TOSTR_META) {
2233 if (stats_tpl_fetch(stats_tpl_fetch_allocid(NULL, sb->tplhash),
2234 &sctx.tpl))
2235 return (EINVAL);
2236 } else
2237 sctx.tpl = NULL;
2238
2239 iflags = 0;
2240 if (flags & SB_TOSTR_OBJDUMP)
2241 iflags |= (SB_IT_NULLVOI | SB_IT_NULLVOISTAT);
2242 stats_v1_blob_iter(sb, stats_v1_itercb_tostr, &sctx, iflags);
2243
2244 return (sbuf_error(buf));
2245 }
2246
2247 static int
2248 stats_v1_itercb_visit(struct statsblobv1 *sb, struct voi *v,
2249 struct voistat *vs, struct sb_iter_ctx *ctx)
2250 {
2251 struct sb_visitcb_ctx *vctx;
2252 struct sb_visit sbv;
2253
2254 vctx = ctx->usrctx;
2255
2256 sbv.tplhash = sb->tplhash;
2257 sbv.voi_id = v->id;
2258 sbv.voi_dtype = v->dtype;
2259 sbv.vs_stype = vs->stype;
2260 sbv.vs_dtype = vs->dtype;
2261 sbv.vs_dsz = vs->dsz;
2262 sbv.vs_data = BLOB_OFFSET(sb, vs->data_off);
2263 sbv.vs_errs = vs->errs;
2264 sbv.flags = ctx->flags & (SB_IT_FIRST_CB | SB_IT_LAST_CB |
2265 SB_IT_FIRST_VOI | SB_IT_LAST_VOI | SB_IT_FIRST_VOISTAT |
2266 SB_IT_LAST_VOISTAT);
2267
2268 return (vctx->cb(&sbv, vctx->usrctx));
2269 }
2270
2271 int
2272 stats_v1_blob_visit(struct statsblobv1 *sb, stats_blob_visitcb_t func,
2273 void *usrctx)
2274 {
2275 struct sb_visitcb_ctx vctx;
2276
2277 if (sb == NULL || sb->abi != STATS_ABI_V1 || func == NULL)
2278 return (EINVAL);
2279
2280 vctx.cb = func;
2281 vctx.usrctx = usrctx;
2282
2283 stats_v1_blob_iter(sb, stats_v1_itercb_visit, &vctx, 0);
2284
2285 return (0);
2286 }
2287
2288 static int
2289 stats_v1_icb_reset_voistat(struct statsblobv1 *sb, struct voi *v __unused,
2290 struct voistat *vs, struct sb_iter_ctx *ctx __unused)
2291 {
2292 void *vsd;
2293
2294 if (vs->stype == VS_STYPE_VOISTATE)
2295 return (0);
2296
2297 vsd = BLOB_OFFSET(sb, vs->data_off);
2298
2299 /* Perform the stat type's default reset action. */
2300 switch (vs->stype) {
2301 case VS_STYPE_SUM:
2302 switch (vs->dtype) {
2303 case VSD_DTYPE_Q_S32:
2304 Q_SIFVAL(VSD(q32, vsd)->sq32, 0);
2305 break;
2306 case VSD_DTYPE_Q_U32:
2307 Q_SIFVAL(VSD(q32, vsd)->uq32, 0);
2308 break;
2309 case VSD_DTYPE_Q_S64:
2310 Q_SIFVAL(VSD(q64, vsd)->sq64, 0);
2311 break;
2312 case VSD_DTYPE_Q_U64:
2313 Q_SIFVAL(VSD(q64, vsd)->uq64, 0);
2314 break;
2315 default:
2316 bzero(vsd, vs->dsz);
2317 break;
2318 }
2319 break;
2320 case VS_STYPE_MAX:
2321 switch (vs->dtype) {
2322 case VSD_DTYPE_Q_S32:
2323 Q_SIFVAL(VSD(q32, vsd)->sq32,
2324 Q_IFMINVAL(VSD(q32, vsd)->sq32));
2325 break;
2326 case VSD_DTYPE_Q_U32:
2327 Q_SIFVAL(VSD(q32, vsd)->uq32,
2328 Q_IFMINVAL(VSD(q32, vsd)->uq32));
2329 break;
2330 case VSD_DTYPE_Q_S64:
2331 Q_SIFVAL(VSD(q64, vsd)->sq64,
2332 Q_IFMINVAL(VSD(q64, vsd)->sq64));
2333 break;
2334 case VSD_DTYPE_Q_U64:
2335 Q_SIFVAL(VSD(q64, vsd)->uq64,
2336 Q_IFMINVAL(VSD(q64, vsd)->uq64));
2337 break;
2338 default:
2339 memcpy(vsd, &numeric_limits[LIM_MIN][vs->dtype],
2340 vs->dsz);
2341 break;
2342 }
2343 break;
2344 case VS_STYPE_MIN:
2345 switch (vs->dtype) {
2346 case VSD_DTYPE_Q_S32:
2347 Q_SIFVAL(VSD(q32, vsd)->sq32,
2348 Q_IFMAXVAL(VSD(q32, vsd)->sq32));
2349 break;
2350 case VSD_DTYPE_Q_U32:
2351 Q_SIFVAL(VSD(q32, vsd)->uq32,
2352 Q_IFMAXVAL(VSD(q32, vsd)->uq32));
2353 break;
2354 case VSD_DTYPE_Q_S64:
2355 Q_SIFVAL(VSD(q64, vsd)->sq64,
2356 Q_IFMAXVAL(VSD(q64, vsd)->sq64));
2357 break;
2358 case VSD_DTYPE_Q_U64:
2359 Q_SIFVAL(VSD(q64, vsd)->uq64,
2360 Q_IFMAXVAL(VSD(q64, vsd)->uq64));
2361 break;
2362 default:
2363 memcpy(vsd, &numeric_limits[LIM_MAX][vs->dtype],
2364 vs->dsz);
2365 break;
2366 }
2367 break;
2368 case VS_STYPE_HIST:
2369 {
2370 /* Reset bucket counts. */
2371 struct voistatdata_hist *hist;
2372 int i, is32bit;
2373 uint16_t nbkts;
2374
2375 hist = VSD(hist, vsd);
2376 switch (vs->dtype) {
2377 case VSD_DTYPE_CRHIST32:
2378 nbkts = HIST_VSDSZ2NBKTS(crhist32, vs->dsz);
2379 is32bit = 1;
2380 break;
2381 case VSD_DTYPE_DRHIST32:
2382 nbkts = HIST_VSDSZ2NBKTS(drhist32, vs->dsz);
2383 is32bit = 1;
2384 break;
2385 case VSD_DTYPE_DVHIST32:
2386 nbkts = HIST_VSDSZ2NBKTS(dvhist32, vs->dsz);
2387 is32bit = 1;
2388 break;
2389 case VSD_DTYPE_CRHIST64:
2390 nbkts = HIST_VSDSZ2NBKTS(crhist64, vs->dsz);
2391 is32bit = 0;
2392 break;
2393 case VSD_DTYPE_DRHIST64:
2394 nbkts = HIST_VSDSZ2NBKTS(drhist64, vs->dsz);
2395 is32bit = 0;
2396 break;
2397 case VSD_DTYPE_DVHIST64:
2398 nbkts = HIST_VSDSZ2NBKTS(dvhist64, vs->dsz);
2399 is32bit = 0;
2400 break;
2401 default:
2402 return (0);
2403 }
2404
2405 bzero(VSD_HIST_FIELDPTR(hist, vs->dtype, oob),
2406 is32bit ? sizeof(uint32_t) : sizeof(uint64_t));
2407 for (i = nbkts - 1; i >= 0; i--) {
2408 bzero(VSD_HIST_FIELDPTR(hist, vs->dtype,
2409 bkts[i].cnt), is32bit ? sizeof(uint32_t) :
2410 sizeof(uint64_t));
2411 }
2412 break;
2413 }
2414 case VS_STYPE_TDGST:
2415 {
2416 /* Reset sample count centroids array/tree. */
2417 struct voistatdata_tdgst *tdgst;
2418 struct ctdth32 *ctd32tree;
2419 struct ctdth64 *ctd64tree;
2420 struct voistatdata_tdgstctd32 *ctd32;
2421 struct voistatdata_tdgstctd64 *ctd64;
2422
2423 tdgst = VSD(tdgst, vsd);
2424 switch (vs->dtype) {
2425 case VSD_DTYPE_TDGSTCLUST32:
2426 VSD(tdgstclust32, tdgst)->smplcnt = 0;
2427 VSD(tdgstclust32, tdgst)->compcnt = 0;
2428 ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
2429 ARB_INIT(ctd32, ctdlnk, ctd32tree,
2430 ARB_MAXNODES(ctd32tree)) {
2431 ctd32->cnt = 0;
2432 Q_SIFVAL(ctd32->mu, 0);
2433 }
2434 #ifdef DIAGNOSTIC
2435 RB_INIT(&VSD(tdgstclust32, tdgst)->rbctdtree);
2436 #endif
2437 break;
2438 case VSD_DTYPE_TDGSTCLUST64:
2439 VSD(tdgstclust64, tdgst)->smplcnt = 0;
2440 VSD(tdgstclust64, tdgst)->compcnt = 0;
2441 ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
2442 ARB_INIT(ctd64, ctdlnk, ctd64tree,
2443 ARB_MAXNODES(ctd64tree)) {
2444 ctd64->cnt = 0;
2445 Q_SIFVAL(ctd64->mu, 0);
2446 }
2447 #ifdef DIAGNOSTIC
2448 RB_INIT(&VSD(tdgstclust64, tdgst)->rbctdtree);
2449 #endif
2450 break;
2451 default:
2452 return (0);
2453 }
2454 break;
2455 }
2456 default:
2457 KASSERT(0, ("Unknown VOI stat type %d", vs->stype));
2458 break;
2459 }
2460
2461 vs->errs = 0;
2462 vs->flags &= ~VS_VSDVALID;
2463
2464 return (0);
2465 }
2466
2467 int
2468 stats_v1_blob_snapshot(struct statsblobv1 **dst, size_t dstmaxsz,
2469 struct statsblobv1 *src, uint32_t flags)
2470 {
2471 int error;
2472
2473 if (src != NULL && src->abi == STATS_ABI_V1) {
2474 error = stats_v1_blob_clone(dst, dstmaxsz, src, flags);
2475 if (!error) {
2476 if (flags & SB_CLONE_RSTSRC) {
2477 stats_v1_blob_iter(src,
2478 stats_v1_icb_reset_voistat, NULL, 0);
2479 src->lastrst = stats_sbinuptime();
2480 }
2481 stats_v1_blob_finalise(*dst);
2482 }
2483 } else
2484 error = EINVAL;
2485
2486 return (error);
2487 }
2488
2489 static inline int
2490 stats_v1_voi_update_max(enum vsd_dtype voi_dtype __unused,
2491 struct voistatdata *voival, struct voistat *vs, void *vsd)
2492 {
2493 int error;
2494
2495 KASSERT(vs->dtype < VSD_NUM_DTYPES,
2496 ("Unknown VSD dtype %d", vs->dtype));
2497
2498 error = 0;
2499
2500 switch (vs->dtype) {
2501 case VSD_DTYPE_INT_S32:
2502 if (VSD(int32, vsd)->s32 < voival->int32.s32) {
2503 VSD(int32, vsd)->s32 = voival->int32.s32;
2504 vs->flags |= VS_VSDVALID;
2505 }
2506 break;
2507 case VSD_DTYPE_INT_U32:
2508 if (VSD(int32, vsd)->u32 < voival->int32.u32) {
2509 VSD(int32, vsd)->u32 = voival->int32.u32;
2510 vs->flags |= VS_VSDVALID;
2511 }
2512 break;
2513 case VSD_DTYPE_INT_S64:
2514 if (VSD(int64, vsd)->s64 < voival->int64.s64) {
2515 VSD(int64, vsd)->s64 = voival->int64.s64;
2516 vs->flags |= VS_VSDVALID;
2517 }
2518 break;
2519 case VSD_DTYPE_INT_U64:
2520 if (VSD(int64, vsd)->u64 < voival->int64.u64) {
2521 VSD(int64, vsd)->u64 = voival->int64.u64;
2522 vs->flags |= VS_VSDVALID;
2523 }
2524 break;
2525 case VSD_DTYPE_INT_SLONG:
2526 if (VSD(intlong, vsd)->slong < voival->intlong.slong) {
2527 VSD(intlong, vsd)->slong = voival->intlong.slong;
2528 vs->flags |= VS_VSDVALID;
2529 }
2530 break;
2531 case VSD_DTYPE_INT_ULONG:
2532 if (VSD(intlong, vsd)->ulong < voival->intlong.ulong) {
2533 VSD(intlong, vsd)->ulong = voival->intlong.ulong;
2534 vs->flags |= VS_VSDVALID;
2535 }
2536 break;
2537 case VSD_DTYPE_Q_S32:
2538 if (Q_QLTQ(VSD(q32, vsd)->sq32, voival->q32.sq32) &&
2539 (0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->sq32,
2540 voival->q32.sq32)))) {
2541 vs->flags |= VS_VSDVALID;
2542 }
2543 break;
2544 case VSD_DTYPE_Q_U32:
2545 if (Q_QLTQ(VSD(q32, vsd)->uq32, voival->q32.uq32) &&
2546 (0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->uq32,
2547 voival->q32.uq32)))) {
2548 vs->flags |= VS_VSDVALID;
2549 }
2550 break;
2551 case VSD_DTYPE_Q_S64:
2552 if (Q_QLTQ(VSD(q64, vsd)->sq64, voival->q64.sq64) &&
2553 (0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->sq64,
2554 voival->q64.sq64)))) {
2555 vs->flags |= VS_VSDVALID;
2556 }
2557 break;
2558 case VSD_DTYPE_Q_U64:
2559 if (Q_QLTQ(VSD(q64, vsd)->uq64, voival->q64.uq64) &&
2560 (0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->uq64,
2561 voival->q64.uq64)))) {
2562 vs->flags |= VS_VSDVALID;
2563 }
2564 break;
2565 default:
2566 error = EINVAL;
2567 break;
2568 }
2569
2570 return (error);
2571 }
2572
2573 static inline int
2574 stats_v1_voi_update_min(enum vsd_dtype voi_dtype __unused,
2575 struct voistatdata *voival, struct voistat *vs, void *vsd)
2576 {
2577 int error;
2578
2579 KASSERT(vs->dtype < VSD_NUM_DTYPES,
2580 ("Unknown VSD dtype %d", vs->dtype));
2581
2582 error = 0;
2583
2584 switch (vs->dtype) {
2585 case VSD_DTYPE_INT_S32:
2586 if (VSD(int32, vsd)->s32 > voival->int32.s32) {
2587 VSD(int32, vsd)->s32 = voival->int32.s32;
2588 vs->flags |= VS_VSDVALID;
2589 }
2590 break;
2591 case VSD_DTYPE_INT_U32:
2592 if (VSD(int32, vsd)->u32 > voival->int32.u32) {
2593 VSD(int32, vsd)->u32 = voival->int32.u32;
2594 vs->flags |= VS_VSDVALID;
2595 }
2596 break;
2597 case VSD_DTYPE_INT_S64:
2598 if (VSD(int64, vsd)->s64 > voival->int64.s64) {
2599 VSD(int64, vsd)->s64 = voival->int64.s64;
2600 vs->flags |= VS_VSDVALID;
2601 }
2602 break;
2603 case VSD_DTYPE_INT_U64:
2604 if (VSD(int64, vsd)->u64 > voival->int64.u64) {
2605 VSD(int64, vsd)->u64 = voival->int64.u64;
2606 vs->flags |= VS_VSDVALID;
2607 }
2608 break;
2609 case VSD_DTYPE_INT_SLONG:
2610 if (VSD(intlong, vsd)->slong > voival->intlong.slong) {
2611 VSD(intlong, vsd)->slong = voival->intlong.slong;
2612 vs->flags |= VS_VSDVALID;
2613 }
2614 break;
2615 case VSD_DTYPE_INT_ULONG:
2616 if (VSD(intlong, vsd)->ulong > voival->intlong.ulong) {
2617 VSD(intlong, vsd)->ulong = voival->intlong.ulong;
2618 vs->flags |= VS_VSDVALID;
2619 }
2620 break;
2621 case VSD_DTYPE_Q_S32:
2622 if (Q_QGTQ(VSD(q32, vsd)->sq32, voival->q32.sq32) &&
2623 (0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->sq32,
2624 voival->q32.sq32)))) {
2625 vs->flags |= VS_VSDVALID;
2626 }
2627 break;
2628 case VSD_DTYPE_Q_U32:
2629 if (Q_QGTQ(VSD(q32, vsd)->uq32, voival->q32.uq32) &&
2630 (0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->uq32,
2631 voival->q32.uq32)))) {
2632 vs->flags |= VS_VSDVALID;
2633 }
2634 break;
2635 case VSD_DTYPE_Q_S64:
2636 if (Q_QGTQ(VSD(q64, vsd)->sq64, voival->q64.sq64) &&
2637 (0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->sq64,
2638 voival->q64.sq64)))) {
2639 vs->flags |= VS_VSDVALID;
2640 }
2641 break;
2642 case VSD_DTYPE_Q_U64:
2643 if (Q_QGTQ(VSD(q64, vsd)->uq64, voival->q64.uq64) &&
2644 (0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->uq64,
2645 voival->q64.uq64)))) {
2646 vs->flags |= VS_VSDVALID;
2647 }
2648 break;
2649 default:
2650 error = EINVAL;
2651 break;
2652 }
2653
2654 return (error);
2655 }
2656
2657 static inline int
2658 stats_v1_voi_update_sum(enum vsd_dtype voi_dtype __unused,
2659 struct voistatdata *voival, struct voistat *vs, void *vsd)
2660 {
2661 int error;
2662
2663 KASSERT(vs->dtype < VSD_NUM_DTYPES,
2664 ("Unknown VSD dtype %d", vs->dtype));
2665
2666 error = 0;
2667
2668 switch (vs->dtype) {
2669 case VSD_DTYPE_INT_S32:
2670 VSD(int32, vsd)->s32 += voival->int32.s32;
2671 break;
2672 case VSD_DTYPE_INT_U32:
2673 VSD(int32, vsd)->u32 += voival->int32.u32;
2674 break;
2675 case VSD_DTYPE_INT_S64:
2676 VSD(int64, vsd)->s64 += voival->int64.s64;
2677 break;
2678 case VSD_DTYPE_INT_U64:
2679 VSD(int64, vsd)->u64 += voival->int64.u64;
2680 break;
2681 case VSD_DTYPE_INT_SLONG:
2682 VSD(intlong, vsd)->slong += voival->intlong.slong;
2683 break;
2684 case VSD_DTYPE_INT_ULONG:
2685 VSD(intlong, vsd)->ulong += voival->intlong.ulong;
2686 break;
2687 case VSD_DTYPE_Q_S32:
2688 error = Q_QADDQ(&VSD(q32, vsd)->sq32, voival->q32.sq32);
2689 break;
2690 case VSD_DTYPE_Q_U32:
2691 error = Q_QADDQ(&VSD(q32, vsd)->uq32, voival->q32.uq32);
2692 break;
2693 case VSD_DTYPE_Q_S64:
2694 error = Q_QADDQ(&VSD(q64, vsd)->sq64, voival->q64.sq64);
2695 break;
2696 case VSD_DTYPE_Q_U64:
2697 error = Q_QADDQ(&VSD(q64, vsd)->uq64, voival->q64.uq64);
2698 break;
2699 default:
2700 error = EINVAL;
2701 break;
2702 }
2703
2704 if (!error)
2705 vs->flags |= VS_VSDVALID;
2706
2707 return (error);
2708 }
2709
2710 static inline int
2711 stats_v1_voi_update_hist(enum vsd_dtype voi_dtype, struct voistatdata *voival,
2712 struct voistat *vs, struct voistatdata_hist *hist)
2713 {
2714 struct voistatdata_numeric *bkt_lb, *bkt_ub;
2715 uint64_t *oob64, *cnt64;
2716 uint32_t *oob32, *cnt32;
2717 int error, i, found, is32bit, has_ub, eq_only;
2718
2719 error = 0;
2720
2721 switch (vs->dtype) {
2722 case VSD_DTYPE_CRHIST32:
2723 i = HIST_VSDSZ2NBKTS(crhist32, vs->dsz);
2724 is32bit = 1;
2725 has_ub = eq_only = 0;
2726 oob32 = &VSD(crhist32, hist)->oob;
2727 break;
2728 case VSD_DTYPE_DRHIST32:
2729 i = HIST_VSDSZ2NBKTS(drhist32, vs->dsz);
2730 is32bit = has_ub = 1;
2731 eq_only = 0;
2732 oob32 = &VSD(drhist32, hist)->oob;
2733 break;
2734 case VSD_DTYPE_DVHIST32:
2735 i = HIST_VSDSZ2NBKTS(dvhist32, vs->dsz);
2736 is32bit = eq_only = 1;
2737 has_ub = 0;
2738 oob32 = &VSD(dvhist32, hist)->oob;
2739 break;
2740 case VSD_DTYPE_CRHIST64:
2741 i = HIST_VSDSZ2NBKTS(crhist64, vs->dsz);
2742 is32bit = has_ub = eq_only = 0;
2743 oob64 = &VSD(crhist64, hist)->oob;
2744 break;
2745 case VSD_DTYPE_DRHIST64:
2746 i = HIST_VSDSZ2NBKTS(drhist64, vs->dsz);
2747 is32bit = eq_only = 0;
2748 has_ub = 1;
2749 oob64 = &VSD(drhist64, hist)->oob;
2750 break;
2751 case VSD_DTYPE_DVHIST64:
2752 i = HIST_VSDSZ2NBKTS(dvhist64, vs->dsz);
2753 is32bit = has_ub = 0;
2754 eq_only = 1;
2755 oob64 = &VSD(dvhist64, hist)->oob;
2756 break;
2757 default:
2758 return (EINVAL);
2759 }
2760 i--; /* Adjust for 0-based array index. */
2761
2762 /* XXXLAS: Should probably use a better bucket search algorithm. ARB? */
2763 for (found = 0; i >= 0 && !found; i--) {
2764 switch (vs->dtype) {
2765 case VSD_DTYPE_CRHIST32:
2766 bkt_lb = &VSD(crhist32, hist)->bkts[i].lb;
2767 cnt32 = &VSD(crhist32, hist)->bkts[i].cnt;
2768 break;
2769 case VSD_DTYPE_DRHIST32:
2770 bkt_lb = &VSD(drhist32, hist)->bkts[i].lb;
2771 bkt_ub = &VSD(drhist32, hist)->bkts[i].ub;
2772 cnt32 = &VSD(drhist32, hist)->bkts[i].cnt;
2773 break;
2774 case VSD_DTYPE_DVHIST32:
2775 bkt_lb = &VSD(dvhist32, hist)->bkts[i].val;
2776 cnt32 = &VSD(dvhist32, hist)->bkts[i].cnt;
2777 break;
2778 case VSD_DTYPE_CRHIST64:
2779 bkt_lb = &VSD(crhist64, hist)->bkts[i].lb;
2780 cnt64 = &VSD(crhist64, hist)->bkts[i].cnt;
2781 break;
2782 case VSD_DTYPE_DRHIST64:
2783 bkt_lb = &VSD(drhist64, hist)->bkts[i].lb;
2784 bkt_ub = &VSD(drhist64, hist)->bkts[i].ub;
2785 cnt64 = &VSD(drhist64, hist)->bkts[i].cnt;
2786 break;
2787 case VSD_DTYPE_DVHIST64:
2788 bkt_lb = &VSD(dvhist64, hist)->bkts[i].val;
2789 cnt64 = &VSD(dvhist64, hist)->bkts[i].cnt;
2790 break;
2791 default:
2792 return (EINVAL);
2793 }
2794
2795 switch (voi_dtype) {
2796 case VSD_DTYPE_INT_S32:
2797 if (voival->int32.s32 >= bkt_lb->int32.s32) {
2798 if ((eq_only && voival->int32.s32 ==
2799 bkt_lb->int32.s32) ||
2800 (!eq_only && (!has_ub ||
2801 voival->int32.s32 < bkt_ub->int32.s32)))
2802 found = 1;
2803 }
2804 break;
2805 case VSD_DTYPE_INT_U32:
2806 if (voival->int32.u32 >= bkt_lb->int32.u32) {
2807 if ((eq_only && voival->int32.u32 ==
2808 bkt_lb->int32.u32) ||
2809 (!eq_only && (!has_ub ||
2810 voival->int32.u32 < bkt_ub->int32.u32)))
2811 found = 1;
2812 }
2813 break;
2814 case VSD_DTYPE_INT_S64:
2815 if (voival->int64.s64 >= bkt_lb->int64.s64)
2816 if ((eq_only && voival->int64.s64 ==
2817 bkt_lb->int64.s64) ||
2818 (!eq_only && (!has_ub ||
2819 voival->int64.s64 < bkt_ub->int64.s64)))
2820 found = 1;
2821 break;
2822 case VSD_DTYPE_INT_U64:
2823 if (voival->int64.u64 >= bkt_lb->int64.u64)
2824 if ((eq_only && voival->int64.u64 ==
2825 bkt_lb->int64.u64) ||
2826 (!eq_only && (!has_ub ||
2827 voival->int64.u64 < bkt_ub->int64.u64)))
2828 found = 1;
2829 break;
2830 case VSD_DTYPE_INT_SLONG:
2831 if (voival->intlong.slong >= bkt_lb->intlong.slong)
2832 if ((eq_only && voival->intlong.slong ==
2833 bkt_lb->intlong.slong) ||
2834 (!eq_only && (!has_ub ||
2835 voival->intlong.slong <
2836 bkt_ub->intlong.slong)))
2837 found = 1;
2838 break;
2839 case VSD_DTYPE_INT_ULONG:
2840 if (voival->intlong.ulong >= bkt_lb->intlong.ulong)
2841 if ((eq_only && voival->intlong.ulong ==
2842 bkt_lb->intlong.ulong) ||
2843 (!eq_only && (!has_ub ||
2844 voival->intlong.ulong <
2845 bkt_ub->intlong.ulong)))
2846 found = 1;
2847 break;
2848 case VSD_DTYPE_Q_S32:
2849 if (Q_QGEQ(voival->q32.sq32, bkt_lb->q32.sq32))
2850 if ((eq_only && Q_QEQ(voival->q32.sq32,
2851 bkt_lb->q32.sq32)) ||
2852 (!eq_only && (!has_ub ||
2853 Q_QLTQ(voival->q32.sq32,
2854 bkt_ub->q32.sq32))))
2855 found = 1;
2856 break;
2857 case VSD_DTYPE_Q_U32:
2858 if (Q_QGEQ(voival->q32.uq32, bkt_lb->q32.uq32))
2859 if ((eq_only && Q_QEQ(voival->q32.uq32,
2860 bkt_lb->q32.uq32)) ||
2861 (!eq_only && (!has_ub ||
2862 Q_QLTQ(voival->q32.uq32,
2863 bkt_ub->q32.uq32))))
2864 found = 1;
2865 break;
2866 case VSD_DTYPE_Q_S64:
2867 if (Q_QGEQ(voival->q64.sq64, bkt_lb->q64.sq64))
2868 if ((eq_only && Q_QEQ(voival->q64.sq64,
2869 bkt_lb->q64.sq64)) ||
2870 (!eq_only && (!has_ub ||
2871 Q_QLTQ(voival->q64.sq64,
2872 bkt_ub->q64.sq64))))
2873 found = 1;
2874 break;
2875 case VSD_DTYPE_Q_U64:
2876 if (Q_QGEQ(voival->q64.uq64, bkt_lb->q64.uq64))
2877 if ((eq_only && Q_QEQ(voival->q64.uq64,
2878 bkt_lb->q64.uq64)) ||
2879 (!eq_only && (!has_ub ||
2880 Q_QLTQ(voival->q64.uq64,
2881 bkt_ub->q64.uq64))))
2882 found = 1;
2883 break;
2884 default:
2885 break;
2886 }
2887 }
2888
2889 if (found) {
2890 if (is32bit)
2891 *cnt32 += 1;
2892 else
2893 *cnt64 += 1;
2894 } else {
2895 if (is32bit)
2896 *oob32 += 1;
2897 else
2898 *oob64 += 1;
2899 }
2900
2901 vs->flags |= VS_VSDVALID;
2902 return (error);
2903 }
2904
2905 static inline int
2906 stats_v1_vsd_tdgst_compress(enum vsd_dtype vs_dtype,
2907 struct voistatdata_tdgst *tdgst, int attempt)
2908 {
2909 struct ctdth32 *ctd32tree;
2910 struct ctdth64 *ctd64tree;
2911 struct voistatdata_tdgstctd32 *ctd32;
2912 struct voistatdata_tdgstctd64 *ctd64;
2913 uint64_t ebits, idxmask;
2914 uint32_t bitsperidx, nebits;
2915 int error, idx, is32bit, maxctds, remctds, tmperr;
2916
2917 error = 0;
2918
2919 switch (vs_dtype) {
2920 case VSD_DTYPE_TDGSTCLUST32:
2921 ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
2922 if (!ARB_FULL(ctd32tree))
2923 return (0);
2924 VSD(tdgstclust32, tdgst)->compcnt++;
2925 maxctds = remctds = ARB_MAXNODES(ctd32tree);
2926 ARB_RESET_TREE(ctd32tree, ctdth32, maxctds);
2927 VSD(tdgstclust32, tdgst)->smplcnt = 0;
2928 is32bit = 1;
2929 ctd64tree = NULL;
2930 ctd64 = NULL;
2931 #ifdef DIAGNOSTIC
2932 RB_INIT(&VSD(tdgstclust32, tdgst)->rbctdtree);
2933 #endif
2934 break;
2935 case VSD_DTYPE_TDGSTCLUST64:
2936 ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
2937 if (!ARB_FULL(ctd64tree))
2938 return (0);
2939 VSD(tdgstclust64, tdgst)->compcnt++;
2940 maxctds = remctds = ARB_MAXNODES(ctd64tree);
2941 ARB_RESET_TREE(ctd64tree, ctdth64, maxctds);
2942 VSD(tdgstclust64, tdgst)->smplcnt = 0;
2943 is32bit = 0;
2944 ctd32tree = NULL;
2945 ctd32 = NULL;
2946 #ifdef DIAGNOSTIC
2947 RB_INIT(&VSD(tdgstclust64, tdgst)->rbctdtree);
2948 #endif
2949 break;
2950 default:
2951 return (EINVAL);
2952 }
2953
2954 /*
2955 * Rebuild the t-digest ARB by pseudorandomly selecting centroids and
2956 * re-inserting the mu/cnt of each as a value and corresponding weight.
2957 */
2958
2959 /*
2960 * XXXCEM: random(9) is currently rand(3), not random(3). rand(3)
2961 * RAND_MAX happens to be approximately 31 bits (range [0,
2962 * 0x7ffffffd]), so the math kinda works out. When/if this portion of
2963 * the code is compiled in userspace, it gets the random(3) behavior,
2964 * which has expected range [0, 0x7fffffff].
2965 */
2966 #define bitsperrand 31
2967 ebits = 0;
2968 nebits = 0;
2969 bitsperidx = fls(maxctds);
2970 KASSERT(bitsperidx <= sizeof(ebits) << 3,
2971 ("%s: bitsperidx=%d, ebits=%d",
2972 __func__, bitsperidx, (int)(sizeof(ebits) << 3)));
2973 idxmask = (UINT64_C(1) << bitsperidx) - 1;
2974
2975 /* Initialise the free list with randomised centroid indices. */
2976 for (; remctds > 0; remctds--) {
2977 while (nebits < bitsperidx) {
2978 ebits |= ((uint64_t)random()) << nebits;
2979 nebits += bitsperrand;
2980 if (nebits > (sizeof(ebits) << 3))
2981 nebits = sizeof(ebits) << 3;
2982 }
2983 idx = ebits & idxmask;
2984 nebits -= bitsperidx;
2985 ebits >>= bitsperidx;
2986
2987 /*
2988 * Select the next centroid to put on the ARB free list. We
2989 * start with the centroid at our randomly selected array index,
2990 * and work our way forwards until finding one (the latter
2991 * aspect reduces re-insertion randomness, but is good enough).
2992 */
2993 do {
2994 if (idx >= maxctds)
2995 idx %= maxctds;
2996
2997 if (is32bit)
2998 ctd32 = ARB_NODE(ctd32tree, idx);
2999 else
3000 ctd64 = ARB_NODE(ctd64tree, idx);
3001 } while ((is32bit ? ARB_ISFREE(ctd32, ctdlnk) :
3002 ARB_ISFREE(ctd64, ctdlnk)) && ++idx);
3003
3004 /* Put the centroid on the ARB free list. */
3005 if (is32bit)
3006 ARB_RETURNFREE(ctd32tree, ctd32, ctdlnk);
3007 else
3008 ARB_RETURNFREE(ctd64tree, ctd64, ctdlnk);
3009 }
3010
3011 /*
3012 * The free list now contains the randomised indices of every centroid.
3013 * Walk the free list from start to end, re-inserting each centroid's
3014 * mu/cnt. The tdgst_add() call may or may not consume the free centroid
3015 * we re-insert values from during each loop iteration, so we must latch
3016 * the index of the next free list centroid before the re-insertion
3017 * call. The previous loop above should have left the centroid pointer
3018 * pointing to the element at the head of the free list.
3019 */
3020 KASSERT((is32bit ?
3021 ARB_FREEIDX(ctd32tree) == ARB_SELFIDX(ctd32tree, ctd32) :
3022 ARB_FREEIDX(ctd64tree) == ARB_SELFIDX(ctd64tree, ctd64)),
3023 ("%s: t-digest ARB@%p free list bug", __func__,
3024 (is32bit ? (void *)ctd32tree : (void *)ctd64tree)));
3025 remctds = maxctds;
3026 while ((is32bit ? ctd32 != NULL : ctd64 != NULL)) {
3027 tmperr = 0;
3028 if (is32bit) {
3029 s64q_t x;
3030
3031 idx = ARB_NEXTFREEIDX(ctd32, ctdlnk);
3032 /* Cloning a s32q_t into a s64q_t should never fail. */
3033 tmperr = Q_QCLONEQ(&x, ctd32->mu);
3034 tmperr = tmperr ? tmperr : stats_v1_vsd_tdgst_add(
3035 vs_dtype, tdgst, x, ctd32->cnt, attempt);
3036 ctd32 = ARB_NODE(ctd32tree, idx);
3037 KASSERT(ctd32 == NULL || ARB_ISFREE(ctd32, ctdlnk),
3038 ("%s: t-digest ARB@%p free list bug", __func__,
3039 ctd32tree));
3040 } else {
3041 idx = ARB_NEXTFREEIDX(ctd64, ctdlnk);
3042 tmperr = stats_v1_vsd_tdgst_add(vs_dtype, tdgst,
3043 ctd64->mu, ctd64->cnt, attempt);
3044 ctd64 = ARB_NODE(ctd64tree, idx);
3045 KASSERT(ctd64 == NULL || ARB_ISFREE(ctd64, ctdlnk),
3046 ("%s: t-digest ARB@%p free list bug", __func__,
3047 ctd64tree));
3048 }
3049 /*
3050 * This process should not produce errors, bugs notwithstanding.
3051 * Just in case, latch any errors and attempt all re-insertions.
3052 */
3053 error = tmperr ? tmperr : error;
3054 remctds--;
3055 }
3056
3057 KASSERT(remctds == 0, ("%s: t-digest ARB@%p free list bug", __func__,
3058 (is32bit ? (void *)ctd32tree : (void *)ctd64tree)));
3059
3060 return (error);
3061 }
3062
3063 static inline int
3064 stats_v1_vsd_tdgst_add(enum vsd_dtype vs_dtype, struct voistatdata_tdgst *tdgst,
3065 s64q_t x, uint64_t weight, int attempt)
3066 {
3067 #ifdef DIAGNOSTIC
3068 char qstr[Q_MAXSTRLEN(x, 10)];
3069 #endif
3070 struct ctdth32 *ctd32tree;
3071 struct ctdth64 *ctd64tree;
3072 void *closest, *cur, *lb, *ub;
3073 struct voistatdata_tdgstctd32 *ctd32;
3074 struct voistatdata_tdgstctd64 *ctd64;
3075 uint64_t cnt, smplcnt, sum, tmpsum;
3076 s64q_t k, minz, q, z;
3077 int error, is32bit, n;
3078
3079 error = 0;
3080 minz = Q_INI(&z, 0, 0, Q_NFBITS(x));
3081
3082 switch (vs_dtype) {
3083 case VSD_DTYPE_TDGSTCLUST32:
3084 if ((UINT32_MAX - weight) < VSD(tdgstclust32, tdgst)->smplcnt)
3085 error = EOVERFLOW;
3086 smplcnt = VSD(tdgstclust32, tdgst)->smplcnt;
3087 ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
3088 is32bit = 1;
3089 ctd64tree = NULL;
3090 ctd64 = NULL;
3091 break;
3092 case VSD_DTYPE_TDGSTCLUST64:
3093 if ((UINT64_MAX - weight) < VSD(tdgstclust64, tdgst)->smplcnt)
3094 error = EOVERFLOW;
3095 smplcnt = VSD(tdgstclust64, tdgst)->smplcnt;
3096 ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
3097 is32bit = 0;
3098 ctd32tree = NULL;
3099 ctd32 = NULL;
3100 break;
3101 default:
3102 error = EINVAL;
3103 break;
3104 }
3105
3106 if (error)
3107 return (error);
3108
3109 /*
3110 * Inspired by Ted Dunning's AVLTreeDigest.java
3111 */
3112 do {
3113 #if defined(DIAGNOSTIC)
3114 KASSERT(attempt < 5,
3115 ("%s: Too many attempts", __func__));
3116 #endif
3117 if (attempt >= 5)
3118 return (EAGAIN);
3119
3120 Q_SIFVAL(minz, Q_IFMAXVAL(minz));
3121 closest = ub = NULL;
3122 sum = tmpsum = 0;
3123
3124 if (is32bit)
3125 lb = cur = (void *)(ctd32 = ARB_MIN(ctdth32, ctd32tree));
3126 else
3127 lb = cur = (void *)(ctd64 = ARB_MIN(ctdth64, ctd64tree));
3128
3129 if (lb == NULL) /* Empty tree. */
3130 lb = (is32bit ? (void *)ARB_ROOT(ctd32tree) :
3131 (void *)ARB_ROOT(ctd64tree));
3132
3133 /*
3134 * Find the set of centroids with minimum distance to x and
3135 * compute the sum of counts for all centroids with mean less
3136 * than the first centroid in the set.
3137 */
3138 for (; cur != NULL;
3139 cur = (is32bit ?
3140 (void *)(ctd32 = ARB_NEXT(ctdth32, ctd32tree, ctd32)) :
3141 (void *)(ctd64 = ARB_NEXT(ctdth64, ctd64tree, ctd64)))) {
3142 if (is32bit) {
3143 cnt = ctd32->cnt;
3144 KASSERT(Q_PRECEQ(ctd32->mu, x),
3145 ("%s: Q_RELPREC(mu,x)=%d", __func__,
3146 Q_RELPREC(ctd32->mu, x)));
3147 /* Ok to assign as both have same precision. */
3148 z = ctd32->mu;
3149 } else {
3150 cnt = ctd64->cnt;
3151 KASSERT(Q_PRECEQ(ctd64->mu, x),
3152 ("%s: Q_RELPREC(mu,x)=%d", __func__,
3153 Q_RELPREC(ctd64->mu, x)));
3154 /* Ok to assign as both have same precision. */
3155 z = ctd64->mu;
3156 }
3157
3158 error = Q_QSUBQ(&z, x);
3159 #if defined(DIAGNOSTIC)
3160 KASSERT(!error, ("%s: unexpected error %d", __func__,
3161 error));
3162 #endif
3163 if (error)
3164 return (error);
3165
3166 z = Q_QABS(z);
3167 if (Q_QLTQ(z, minz)) {
3168 minz = z;
3169 lb = cur;
3170 sum = tmpsum;
3171 tmpsum += cnt;
3172 } else if (Q_QGTQ(z, minz)) {
3173 ub = cur;
3174 break;
3175 }
3176 }
3177
3178 cur = (is32bit ?
3179 (void *)(ctd32 = (struct voistatdata_tdgstctd32 *)lb) :
3180 (void *)(ctd64 = (struct voistatdata_tdgstctd64 *)lb));
3181
3182 for (n = 0; cur != ub; cur = (is32bit ?
3183 (void *)(ctd32 = ARB_NEXT(ctdth32, ctd32tree, ctd32)) :
3184 (void *)(ctd64 = ARB_NEXT(ctdth64, ctd64tree, ctd64)))) {
3185 if (is32bit)
3186 cnt = ctd32->cnt;
3187 else
3188 cnt = ctd64->cnt;
3189
3190 q = Q_CTRLINI(16);
3191 if (smplcnt == 1)
3192 error = Q_QFRACI(&q, 1, 2);
3193 else
3194 /* [ sum + ((cnt - 1) / 2) ] / (smplcnt - 1) */
3195 error = Q_QFRACI(&q, (sum << 1) + cnt - 1,
3196 (smplcnt - 1) << 1);
3197 k = q;
3198 /* k = q x 4 x samplcnt x attempt */
3199 error |= Q_QMULI(&k, 4 * smplcnt * attempt);
3200 /* k = k x (1 - q) */
3201 error |= Q_QSUBI(&q, 1);
3202 q = Q_QABS(q);
3203 error |= Q_QMULQ(&k, q);
3204 #if defined(DIAGNOSTIC)
3205 #if !defined(_KERNEL)
3206 double q_dbl, k_dbl, q2d, k2d;
3207 q2d = Q_Q2D(q);
3208 k2d = Q_Q2D(k);
3209 q_dbl = smplcnt == 1 ? 0.5 :
3210 (sum + ((cnt - 1) / 2.0)) / (double)(smplcnt - 1);
3211 k_dbl = 4 * smplcnt * q_dbl * (1.0 - q_dbl) * attempt;
3212 /*
3213 * If the difference between q and q_dbl is greater than
3214 * the fractional precision of q, something is off.
3215 * NB: q is holding the value of 1 - q
3216 */
3217 q_dbl = 1.0 - q_dbl;
3218 KASSERT((q_dbl > q2d ? q_dbl - q2d : q2d - q_dbl) <
3219 (1.05 * ((double)1 / (double)(1ULL << Q_NFBITS(q)))),
3220 ("Q-type q bad precision"));
3221 KASSERT((k_dbl > k2d ? k_dbl - k2d : k2d - k_dbl) <
3222 1.0 + (0.01 * smplcnt),
3223 ("Q-type k bad precision"));
3224 #endif /* !_KERNEL */
3225 KASSERT(!error, ("%s: unexpected error %d", __func__,
3226 error));
3227 #endif /* DIAGNOSTIC */
3228 if (error)
3229 return (error);
3230 if ((is32bit && ((ctd32->cnt + weight) <=
3231 (uint64_t)Q_GIVAL(k))) ||
3232 (!is32bit && ((ctd64->cnt + weight) <=
3233 (uint64_t)Q_GIVAL(k)))) {
3234 n++;
3235 /* random() produces 31 bits. */
3236 if (random() < (INT32_MAX / n))
3237 closest = cur;
3238 }
3239 sum += cnt;
3240 }
3241 } while (closest == NULL &&
3242 (is32bit ? ARB_FULL(ctd32tree) : ARB_FULL(ctd64tree)) &&
3243 (error = stats_v1_vsd_tdgst_compress(vs_dtype, tdgst,
3244 attempt++)) == 0);
3245
3246 if (error)
3247 return (error);
3248
3249 if (closest != NULL) {
3250 /* Merge with an existing centroid. */
3251 if (is32bit) {
3252 ctd32 = (struct voistatdata_tdgstctd32 *)closest;
3253 error = Q_QSUBQ(&x, ctd32->mu);
3254 /*
3255 * The following calculation "x / (cnt + weight)"
3256 * computes the amount by which to adjust the centroid's
3257 * mu value in order to merge in the VOI sample.
3258 *
3259 * It can underflow (Q_QDIVI() returns ERANGE) when the
3260 * user centroids' fractional precision (which is
3261 * inherited by 'x') is too low to represent the result.
3262 *
3263 * A sophisticated approach to dealing with this issue
3264 * would minimise accumulation of error by tracking
3265 * underflow per centroid and making an adjustment when
3266 * a LSB's worth of underflow has accumulated.
3267 *
3268 * A simpler approach is to let the result underflow
3269 * i.e. merge the VOI sample into the centroid without
3270 * adjusting the centroid's mu, and rely on the user to
3271 * specify their t-digest with sufficient centroid
3272 * fractional precision such that the accumulation of
3273 * error from multiple underflows is of no material
3274 * consequence to the centroid's final value of mu.
3275 *
3276 * For the moment, the latter approach is employed by
3277 * simply ignoring ERANGE here.
3278 *
3279 * XXXLAS: Per-centroid underflow tracking is likely too
3280 * onerous, but it probably makes sense to accumulate a
3281 * single underflow error variable across all centroids
3282 * and report it as part of the digest to provide
3283 * additional visibility into the digest's fidelity.
3284 */
3285 error = error ? error :
3286 Q_QDIVI(&x, ctd32->cnt + weight);
3287 if ((error && error != ERANGE)
3288 || (error = Q_QADDQ(&ctd32->mu, x))) {
3289 #ifdef DIAGNOSTIC
3290 KASSERT(!error, ("%s: unexpected error %d",
3291 __func__, error));
3292 #endif
3293 return (error);
3294 }
3295 ctd32->cnt += weight;
3296 error = ARB_REINSERT(ctdth32, ctd32tree, ctd32) ==
3297 NULL ? 0 : EALREADY;
3298 #ifdef DIAGNOSTIC
3299 RB_REINSERT(rbctdth32,
3300 &VSD(tdgstclust32, tdgst)->rbctdtree, ctd32);
3301 #endif
3302 } else {
3303 ctd64 = (struct voistatdata_tdgstctd64 *)closest;
3304 error = Q_QSUBQ(&x, ctd64->mu);
3305 error = error ? error :
3306 Q_QDIVI(&x, ctd64->cnt + weight);
3307 /* Refer to is32bit ERANGE discussion above. */
3308 if ((error && error != ERANGE)
3309 || (error = Q_QADDQ(&ctd64->mu, x))) {
3310 KASSERT(!error, ("%s: unexpected error %d",
3311 __func__, error));
3312 return (error);
3313 }
3314 ctd64->cnt += weight;
3315 error = ARB_REINSERT(ctdth64, ctd64tree, ctd64) ==
3316 NULL ? 0 : EALREADY;
3317 #ifdef DIAGNOSTIC
3318 RB_REINSERT(rbctdth64,
3319 &VSD(tdgstclust64, tdgst)->rbctdtree, ctd64);
3320 #endif
3321 }
3322 } else {
3323 /*
3324 * Add a new centroid. If digest compression is working
3325 * correctly, there should always be at least one free.
3326 */
3327 if (is32bit) {
3328 ctd32 = ARB_GETFREE(ctd32tree, ctdlnk);
3329 #ifdef DIAGNOSTIC
3330 KASSERT(ctd32 != NULL,
3331 ("%s: t-digest@%p has no free centroids",
3332 __func__, tdgst));
3333 #endif
3334 if (ctd32 == NULL)
3335 return (EAGAIN);
3336 if ((error = Q_QCPYVALQ(&ctd32->mu, x)))
3337 return (error);
3338 ctd32->cnt = weight;
3339 error = ARB_INSERT(ctdth32, ctd32tree, ctd32) == NULL ?
3340 0 : EALREADY;
3341 #ifdef DIAGNOSTIC
3342 RB_INSERT(rbctdth32,
3343 &VSD(tdgstclust32, tdgst)->rbctdtree, ctd32);
3344 #endif
3345 } else {
3346 ctd64 = ARB_GETFREE(ctd64tree, ctdlnk);
3347 #ifdef DIAGNOSTIC
3348 KASSERT(ctd64 != NULL,
3349 ("%s: t-digest@%p has no free centroids",
3350 __func__, tdgst));
3351 #endif
3352 if (ctd64 == NULL) /* Should not happen. */
3353 return (EAGAIN);
3354 /* Direct assignment ok as both have same type/prec. */
3355 ctd64->mu = x;
3356 ctd64->cnt = weight;
3357 error = ARB_INSERT(ctdth64, ctd64tree, ctd64) == NULL ?
3358 0 : EALREADY;
3359 #ifdef DIAGNOSTIC
3360 RB_INSERT(rbctdth64, &VSD(tdgstclust64,
3361 tdgst)->rbctdtree, ctd64);
3362 #endif
3363 }
3364 }
3365
3366 if (is32bit)
3367 VSD(tdgstclust32, tdgst)->smplcnt += weight;
3368 else {
3369 VSD(tdgstclust64, tdgst)->smplcnt += weight;
3370
3371 #ifdef DIAGNOSTIC
3372 struct rbctdth64 *rbctdtree =
3373 &VSD(tdgstclust64, tdgst)->rbctdtree;
3374 struct voistatdata_tdgstctd64 *rbctd64;
3375 int i = 0;
3376 ARB_FOREACH(ctd64, ctdth64, ctd64tree) {
3377 rbctd64 = (i == 0 ? RB_MIN(rbctdth64, rbctdtree) :
3378 RB_NEXT(rbctdth64, rbctdtree, rbctd64));
3379
3380 if (i >= ARB_CURNODES(ctd64tree)
3381 || ctd64 != rbctd64
3382 || ARB_MIN(ctdth64, ctd64tree) !=
3383 RB_MIN(rbctdth64, rbctdtree)
3384 || ARB_MAX(ctdth64, ctd64tree) !=
3385 RB_MAX(rbctdth64, rbctdtree)
3386 || ARB_LEFTIDX(ctd64, ctdlnk) !=
3387 ARB_SELFIDX(ctd64tree, RB_LEFT(rbctd64, rblnk))
3388 || ARB_RIGHTIDX(ctd64, ctdlnk) !=
3389 ARB_SELFIDX(ctd64tree, RB_RIGHT(rbctd64, rblnk))
3390 || ARB_PARENTIDX(ctd64, ctdlnk) !=
3391 ARB_SELFIDX(ctd64tree,
3392 RB_PARENT(rbctd64, rblnk))) {
3393 Q_TOSTR(ctd64->mu, -1, 10, qstr, sizeof(qstr));
3394 printf("ARB ctd=%3d p=%3d l=%3d r=%3d c=%2d "
3395 "mu=%s\n",
3396 (int)ARB_SELFIDX(ctd64tree, ctd64),
3397 ARB_PARENTIDX(ctd64, ctdlnk),
3398 ARB_LEFTIDX(ctd64, ctdlnk),
3399 ARB_RIGHTIDX(ctd64, ctdlnk),
3400 ARB_COLOR(ctd64, ctdlnk),
3401 qstr);
3402
3403 Q_TOSTR(rbctd64->mu, -1, 10, qstr,
3404 sizeof(qstr));
3405 struct voistatdata_tdgstctd64 *parent;
3406 parent = RB_PARENT(rbctd64, rblnk);
3407 int rb_color =
3408 parent == NULL ? 0 :
3409 RB_LEFT(parent, rblnk) == rbctd64 ?
3410 (_RB_BITSUP(parent, rblnk) & _RB_L) != 0 :
3411 (_RB_BITSUP(parent, rblnk) & _RB_R) != 0;
3412 printf(" RB ctd=%3d p=%3d l=%3d r=%3d c=%2d "
3413 "mu=%s\n",
3414 (int)ARB_SELFIDX(ctd64tree, rbctd64),
3415 (int)ARB_SELFIDX(ctd64tree,
3416 RB_PARENT(rbctd64, rblnk)),
3417 (int)ARB_SELFIDX(ctd64tree,
3418 RB_LEFT(rbctd64, rblnk)),
3419 (int)ARB_SELFIDX(ctd64tree,
3420 RB_RIGHT(rbctd64, rblnk)),
3421 rb_color,
3422 qstr);
3423
3424 panic("RB@%p and ARB@%p trees differ\n",
3425 rbctdtree, ctd64tree);
3426 }
3427 i++;
3428 }
3429 #endif /* DIAGNOSTIC */
3430 }
3431
3432 return (error);
3433 }
3434
3435 static inline int
3436 stats_v1_voi_update_tdgst(enum vsd_dtype voi_dtype, struct voistatdata *voival,
3437 struct voistat *vs, struct voistatdata_tdgst *tdgst)
3438 {
3439 s64q_t x;
3440 int error;
3441
3442 error = 0;
3443
3444 switch (vs->dtype) {
3445 case VSD_DTYPE_TDGSTCLUST32:
3446 /* Use same precision as the user's centroids. */
3447 Q_INI(&x, 0, 0, Q_NFBITS(
3448 ARB_CNODE(&VSD(tdgstclust32, tdgst)->ctdtree, 0)->mu));
3449 break;
3450 case VSD_DTYPE_TDGSTCLUST64:
3451 /* Use same precision as the user's centroids. */
3452 Q_INI(&x, 0, 0, Q_NFBITS(
3453 ARB_CNODE(&VSD(tdgstclust64, tdgst)->ctdtree, 0)->mu));
3454 break;
3455 default:
3456 KASSERT(vs->dtype == VSD_DTYPE_TDGSTCLUST32 ||
3457 vs->dtype == VSD_DTYPE_TDGSTCLUST64,
3458 ("%s: vs->dtype(%d) != VSD_DTYPE_TDGSTCLUST<32|64>",
3459 __func__, vs->dtype));
3460 return (EINVAL);
3461 }
3462
3463 /*
3464 * XXXLAS: Should have both a signed and unsigned 'x' variable to avoid
3465 * returning EOVERFLOW if the voival would have fit in a u64q_t.
3466 */
3467 switch (voi_dtype) {
3468 case VSD_DTYPE_INT_S32:
3469 error = Q_QCPYVALI(&x, voival->int32.s32);
3470 break;
3471 case VSD_DTYPE_INT_U32:
3472 error = Q_QCPYVALI(&x, voival->int32.u32);
3473 break;
3474 case VSD_DTYPE_INT_S64:
3475 error = Q_QCPYVALI(&x, voival->int64.s64);
3476 break;
3477 case VSD_DTYPE_INT_U64:
3478 error = Q_QCPYVALI(&x, voival->int64.u64);
3479 break;
3480 case VSD_DTYPE_INT_SLONG:
3481 error = Q_QCPYVALI(&x, voival->intlong.slong);
3482 break;
3483 case VSD_DTYPE_INT_ULONG:
3484 error = Q_QCPYVALI(&x, voival->intlong.ulong);
3485 break;
3486 case VSD_DTYPE_Q_S32:
3487 error = Q_QCPYVALQ(&x, voival->q32.sq32);
3488 break;
3489 case VSD_DTYPE_Q_U32:
3490 error = Q_QCPYVALQ(&x, voival->q32.uq32);
3491 break;
3492 case VSD_DTYPE_Q_S64:
3493 error = Q_QCPYVALQ(&x, voival->q64.sq64);
3494 break;
3495 case VSD_DTYPE_Q_U64:
3496 error = Q_QCPYVALQ(&x, voival->q64.uq64);
3497 break;
3498 default:
3499 error = EINVAL;
3500 break;
3501 }
3502
3503 if (error ||
3504 (error = stats_v1_vsd_tdgst_add(vs->dtype, tdgst, x, 1, 1)))
3505 return (error);
3506
3507 vs->flags |= VS_VSDVALID;
3508 return (0);
3509 }
3510
3511 int
3512 stats_v1_voi_update(struct statsblobv1 *sb, int32_t voi_id,
3513 enum vsd_dtype voi_dtype, struct voistatdata *voival, uint32_t flags)
3514 {
3515 struct voi *v;
3516 struct voistat *vs;
3517 void *statevsd, *vsd;
3518 int error, i, tmperr;
3519
3520 error = 0;
3521
3522 if (sb == NULL || sb->abi != STATS_ABI_V1 || voi_id >= NVOIS(sb) ||
3523 voi_dtype == 0 || voi_dtype >= VSD_NUM_DTYPES || voival == NULL)
3524 return (EINVAL);
3525 v = &sb->vois[voi_id];
3526 if (voi_dtype != v->dtype || v->id < 0 ||
3527 ((flags & SB_VOI_RELUPDATE) && !(v->flags & VOI_REQSTATE)))
3528 return (EINVAL);
3529
3530 vs = BLOB_OFFSET(sb, v->stats_off);
3531 if (v->flags & VOI_REQSTATE)
3532 statevsd = BLOB_OFFSET(sb, vs->data_off);
3533 else
3534 statevsd = NULL;
3535
3536 if (flags & SB_VOI_RELUPDATE) {
3537 switch (voi_dtype) {
3538 case VSD_DTYPE_INT_S32:
3539 voival->int32.s32 +=
3540 VSD(voistate, statevsd)->prev.int32.s32;
3541 break;
3542 case VSD_DTYPE_INT_U32:
3543 voival->int32.u32 +=
3544 VSD(voistate, statevsd)->prev.int32.u32;
3545 break;
3546 case VSD_DTYPE_INT_S64:
3547 voival->int64.s64 +=
3548 VSD(voistate, statevsd)->prev.int64.s64;
3549 break;
3550 case VSD_DTYPE_INT_U64:
3551 voival->int64.u64 +=
3552 VSD(voistate, statevsd)->prev.int64.u64;
3553 break;
3554 case VSD_DTYPE_INT_SLONG:
3555 voival->intlong.slong +=
3556 VSD(voistate, statevsd)->prev.intlong.slong;
3557 break;
3558 case VSD_DTYPE_INT_ULONG:
3559 voival->intlong.ulong +=
3560 VSD(voistate, statevsd)->prev.intlong.ulong;
3561 break;
3562 case VSD_DTYPE_Q_S32:
3563 error = Q_QADDQ(&voival->q32.sq32,
3564 VSD(voistate, statevsd)->prev.q32.sq32);
3565 break;
3566 case VSD_DTYPE_Q_U32:
3567 error = Q_QADDQ(&voival->q32.uq32,
3568 VSD(voistate, statevsd)->prev.q32.uq32);
3569 break;
3570 case VSD_DTYPE_Q_S64:
3571 error = Q_QADDQ(&voival->q64.sq64,
3572 VSD(voistate, statevsd)->prev.q64.sq64);
3573 break;
3574 case VSD_DTYPE_Q_U64:
3575 error = Q_QADDQ(&voival->q64.uq64,
3576 VSD(voistate, statevsd)->prev.q64.uq64);
3577 break;
3578 default:
3579 KASSERT(0, ("Unknown VOI data type %d", voi_dtype));
3580 break;
3581 }
3582 }
3583
3584 if (error)
3585 return (error);
3586
3587 for (i = v->voistatmaxid; i > 0; i--) {
3588 vs = &((struct voistat *)BLOB_OFFSET(sb, v->stats_off))[i];
3589 if (vs->stype < 0)
3590 continue;
3591
3592 vsd = BLOB_OFFSET(sb, vs->data_off);
3593
3594 switch (vs->stype) {
3595 case VS_STYPE_MAX:
3596 tmperr = stats_v1_voi_update_max(voi_dtype, voival,
3597 vs, vsd);
3598 break;
3599 case VS_STYPE_MIN:
3600 tmperr = stats_v1_voi_update_min(voi_dtype, voival,
3601 vs, vsd);
3602 break;
3603 case VS_STYPE_SUM:
3604 tmperr = stats_v1_voi_update_sum(voi_dtype, voival,
3605 vs, vsd);
3606 break;
3607 case VS_STYPE_HIST:
3608 tmperr = stats_v1_voi_update_hist(voi_dtype, voival,
3609 vs, vsd);
3610 break;
3611 case VS_STYPE_TDGST:
3612 tmperr = stats_v1_voi_update_tdgst(voi_dtype, voival,
3613 vs, vsd);
3614 break;
3615 default:
3616 KASSERT(0, ("Unknown VOI stat type %d", vs->stype));
3617 break;
3618 }
3619
3620 if (tmperr) {
3621 error = tmperr;
3622 VS_INCERRS(vs);
3623 }
3624 }
3625
3626 if (statevsd) {
3627 switch (voi_dtype) {
3628 case VSD_DTYPE_INT_S32:
3629 VSD(voistate, statevsd)->prev.int32.s32 =
3630 voival->int32.s32;
3631 break;
3632 case VSD_DTYPE_INT_U32:
3633 VSD(voistate, statevsd)->prev.int32.u32 =
3634 voival->int32.u32;
3635 break;
3636 case VSD_DTYPE_INT_S64:
3637 VSD(voistate, statevsd)->prev.int64.s64 =
3638 voival->int64.s64;
3639 break;
3640 case VSD_DTYPE_INT_U64:
3641 VSD(voistate, statevsd)->prev.int64.u64 =
3642 voival->int64.u64;
3643 break;
3644 case VSD_DTYPE_INT_SLONG:
3645 VSD(voistate, statevsd)->prev.intlong.slong =
3646 voival->intlong.slong;
3647 break;
3648 case VSD_DTYPE_INT_ULONG:
3649 VSD(voistate, statevsd)->prev.intlong.ulong =
3650 voival->intlong.ulong;
3651 break;
3652 case VSD_DTYPE_Q_S32:
3653 error = Q_QCPYVALQ(
3654 &VSD(voistate, statevsd)->prev.q32.sq32,
3655 voival->q32.sq32);
3656 break;
3657 case VSD_DTYPE_Q_U32:
3658 error = Q_QCPYVALQ(
3659 &VSD(voistate, statevsd)->prev.q32.uq32,
3660 voival->q32.uq32);
3661 break;
3662 case VSD_DTYPE_Q_S64:
3663 error = Q_QCPYVALQ(
3664 &VSD(voistate, statevsd)->prev.q64.sq64,
3665 voival->q64.sq64);
3666 break;
3667 case VSD_DTYPE_Q_U64:
3668 error = Q_QCPYVALQ(
3669 &VSD(voistate, statevsd)->prev.q64.uq64,
3670 voival->q64.uq64);
3671 break;
3672 default:
3673 KASSERT(0, ("Unknown VOI data type %d", voi_dtype));
3674 break;
3675 }
3676 }
3677
3678 return (error);
3679 }
3680
3681 #ifdef _KERNEL
3682
3683 static void
3684 stats_init(void *arg)
3685 {
3686
3687 }
3688 SYSINIT(stats, SI_SUB_KDTRACE, SI_ORDER_FIRST, stats_init, NULL);
3689
3690 /*
3691 * Sysctl handler to display the list of available stats templates.
3692 */
3693 static int
3694 stats_tpl_list_available(SYSCTL_HANDLER_ARGS)
3695 {
3696 struct sbuf *s;
3697 int err, i;
3698
3699 err = 0;
3700
3701 /* We can tolerate ntpl being stale, so do not take the lock. */
3702 s = sbuf_new(NULL, NULL, /* +1 per tpl for , */
3703 ntpl * (STATS_TPL_MAX_STR_SPEC_LEN + 1), SBUF_FIXEDLEN);
3704 if (s == NULL)
3705 return (ENOMEM);
3706
3707 TPL_LIST_RLOCK();
3708 for (i = 0; i < ntpl; i++) {
3709 err = sbuf_printf(s, "%s\"%s\":%u", i ? "," : "",
3710 tpllist[i]->mb->tplname, tpllist[i]->mb->tplhash);
3711 if (err) {
3712 /* Sbuf overflow condition. */
3713 err = EOVERFLOW;
3714 break;
3715 }
3716 }
3717 TPL_LIST_RUNLOCK();
3718
3719 if (!err) {
3720 sbuf_finish(s);
3721 err = sysctl_handle_string(oidp, sbuf_data(s), 0, req);
3722 }
3723
3724 sbuf_delete(s);
3725 return (err);
3726 }
3727
3728 /*
3729 * Called by subsystem-specific sysctls to report and/or parse the list of
3730 * templates being sampled and their sampling rates. A stats_tpl_sr_cb_t
3731 * conformant function pointer must be passed in as arg1, which is used to
3732 * interact with the subsystem's stats template sample rates list. If arg2 > 0,
3733 * a zero-initialised allocation of arg2-sized contextual memory is
3734 * heap-allocated and passed in to all subsystem callbacks made during the
3735 * operation of stats_tpl_sample_rates().
3736 *
3737 * XXXLAS: Assumes templates are never removed, which is currently true but may
3738 * need to be reworked in future if dynamic template management becomes a
3739 * requirement e.g. to support kernel module based templates.
3740 */
3741 int
3742 stats_tpl_sample_rates(SYSCTL_HANDLER_ARGS)
3743 {
3744 char kvpair_fmt[16], tplspec_fmt[16];
3745 char tpl_spec[STATS_TPL_MAX_STR_SPEC_LEN];
3746 char tpl_name[TPL_MAX_NAME_LEN + 2]; /* +2 for "" */
3747 stats_tpl_sr_cb_t subsys_cb;
3748 void *subsys_ctx;
3749 char *buf, *new_rates_usr_str, *tpl_name_p;
3750 struct stats_tpl_sample_rate *rates;
3751 struct sbuf *s, _s;
3752 uint32_t cum_pct, pct, tpl_hash;
3753 int err, i, off, len, newlen, nrates;
3754
3755 buf = NULL;
3756 rates = NULL;
3757 err = nrates = 0;
3758 subsys_cb = (stats_tpl_sr_cb_t)arg1;
3759 KASSERT(subsys_cb != NULL, ("%s: subsys_cb == arg1 == NULL", __func__));
3760 if (arg2 > 0)
3761 subsys_ctx = malloc(arg2, M_TEMP, M_WAITOK | M_ZERO);
3762 else
3763 subsys_ctx = NULL;
3764
3765 /* Grab current count of subsystem rates. */
3766 err = subsys_cb(TPL_SR_UNLOCKED_GET, NULL, &nrates, subsys_ctx);
3767 if (err)
3768 goto done;
3769
3770 /* +1 to ensure we can append '\0' post copyin, +5 per rate for =nnn, */
3771 len = max(req->newlen + 1, nrates * (STATS_TPL_MAX_STR_SPEC_LEN + 5));
3772
3773 if (req->oldptr != NULL || req->newptr != NULL)
3774 buf = malloc(len, M_TEMP, M_WAITOK);
3775
3776 if (req->oldptr != NULL) {
3777 if (nrates == 0) {
3778 /* No rates, so return an empty string via oldptr. */
3779 err = SYSCTL_OUT(req, "", 1);
3780 if (err)
3781 goto done;
3782 goto process_new;
3783 }
3784
3785 s = sbuf_new(&_s, buf, len, SBUF_FIXEDLEN | SBUF_INCLUDENUL);
3786
3787 /* Grab locked count of, and ptr to, subsystem rates. */
3788 err = subsys_cb(TPL_SR_RLOCKED_GET, &rates, &nrates,
3789 subsys_ctx);
3790 if (err)
3791 goto done;
3792 TPL_LIST_RLOCK();
3793 for (i = 0; i < nrates && !err; i++) {
3794 err = sbuf_printf(s, "%s\"%s\":%u=%u", i ? "," : "",
3795 tpllist[rates[i].tpl_slot_id]->mb->tplname,
3796 tpllist[rates[i].tpl_slot_id]->mb->tplhash,
3797 rates[i].tpl_sample_pct);
3798 }
3799 TPL_LIST_RUNLOCK();
3800 /* Tell subsystem that we're done with its rates list. */
3801 err = subsys_cb(TPL_SR_RUNLOCK, &rates, &nrates, subsys_ctx);
3802 if (err)
3803 goto done;
3804
3805 err = sbuf_finish(s);
3806 if (err)
3807 goto done; /* We lost a race for buf to be too small. */
3808
3809 /* Return the rendered string data via oldptr. */
3810 err = SYSCTL_OUT(req, sbuf_data(s), sbuf_len(s));
3811 } else {
3812 /* Return the upper bound size for buffer sizing requests. */
3813 err = SYSCTL_OUT(req, NULL, len);
3814 }
3815
3816 process_new:
3817 if (err || req->newptr == NULL)
3818 goto done;
3819
3820 newlen = req->newlen - req->newidx;
3821 err = SYSCTL_IN(req, buf, newlen);
3822 if (err)
3823 goto done;
3824
3825 /*
3826 * Initialise format strings at run time.
3827 *
3828 * Write the max template spec string length into the
3829 * template_spec=percent key-value pair parsing format string as:
3830 * " %<width>[^=]=%u %n"
3831 *
3832 * Write the max template name string length into the tplname:tplhash
3833 * parsing format string as:
3834 * "%<width>[^:]:%u"
3835 *
3836 * Subtract 1 for \0 appended by sscanf().
3837 */
3838 sprintf(kvpair_fmt, " %%%zu[^=]=%%u %%n", sizeof(tpl_spec) - 1);
3839 sprintf(tplspec_fmt, "%%%zu[^:]:%%u", sizeof(tpl_name) - 1);
3840
3841 /*
3842 * Parse each CSV key-value pair specifying a template and its sample
3843 * percentage. Whitespace either side of a key-value pair is ignored.
3844 * Templates can be specified by name, hash, or name and hash per the
3845 * following formats (chars in [] are optional):
3846 * ["]<tplname>["]=<percent>
3847 * :hash=pct
3848 * ["]<tplname>["]:hash=<percent>
3849 */
3850 cum_pct = nrates = 0;
3851 rates = NULL;
3852 buf[newlen] = '\0'; /* buf is at least newlen+1 in size. */
3853 new_rates_usr_str = buf;
3854 while (isspace(*new_rates_usr_str))
3855 new_rates_usr_str++; /* Skip leading whitespace. */
3856 while (*new_rates_usr_str != '\0') {
3857 tpl_name_p = tpl_name;
3858 tpl_name[0] = '\0';
3859 tpl_hash = 0;
3860 off = 0;
3861
3862 /*
3863 * Parse key-value pair which must perform 2 conversions, then
3864 * parse the template spec to extract either name, hash, or name
3865 * and hash depending on the three possible spec formats. The
3866 * tplspec_fmt format specifier parses name or name and hash
3867 * template specs, while the ":%u" format specifier parses
3868 * hash-only template specs. If parsing is successfull, ensure
3869 * the cumulative sampling percentage does not exceed 100.
3870 */
3871 err = EINVAL;
3872 if (2 != sscanf(new_rates_usr_str, kvpair_fmt, tpl_spec, &pct,
3873 &off))
3874 break;
3875 if ((1 > sscanf(tpl_spec, tplspec_fmt, tpl_name, &tpl_hash)) &&
3876 (1 != sscanf(tpl_spec, ":%u", &tpl_hash)))
3877 break;
3878 if ((cum_pct += pct) > 100)
3879 break;
3880 err = 0;
3881
3882 /* Strip surrounding "" from template name if present. */
3883 len = strlen(tpl_name);
3884 if (len > 0) {
3885 if (tpl_name[len - 1] == '"')
3886 tpl_name[--len] = '\0';
3887 if (tpl_name[0] == '"') {
3888 tpl_name_p++;
3889 len--;
3890 }
3891 }
3892
3893 rates = stats_realloc(rates, 0, /* oldsz is unused in kernel. */
3894 (nrates + 1) * sizeof(*rates), M_WAITOK);
3895 rates[nrates].tpl_slot_id =
3896 stats_tpl_fetch_allocid(len ? tpl_name_p : NULL, tpl_hash);
3897 if (rates[nrates].tpl_slot_id < 0) {
3898 err = -rates[nrates].tpl_slot_id;
3899 break;
3900 }
3901 rates[nrates].tpl_sample_pct = pct;
3902 nrates++;
3903 new_rates_usr_str += off;
3904 if (*new_rates_usr_str != ',')
3905 break; /* End-of-input or malformed. */
3906 new_rates_usr_str++; /* Move past comma to next pair. */
3907 }
3908
3909 if (!err) {
3910 if ((new_rates_usr_str - buf) < newlen) {
3911 /* Entire input has not been consumed. */
3912 err = EINVAL;
3913 } else {
3914 /*
3915 * Give subsystem the new rates. They'll return the
3916 * appropriate rates pointer for us to garbage collect.
3917 */
3918 err = subsys_cb(TPL_SR_PUT, &rates, &nrates,
3919 subsys_ctx);
3920 }
3921 }
3922 stats_free(rates);
3923
3924 done:
3925 free(buf, M_TEMP);
3926 free(subsys_ctx, M_TEMP);
3927 return (err);
3928 }
3929
3930 SYSCTL_NODE(_kern, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL,
3931 "stats(9) MIB");
3932
3933 SYSCTL_PROC(_kern_stats, OID_AUTO, templates,
3934 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
3935 stats_tpl_list_available, "A",
3936 "list the name/hash of all available stats(9) templates");
3937
3938 #else /* ! _KERNEL */
3939
3940 static void __attribute__ ((constructor))
3941 stats_constructor(void)
3942 {
3943
3944 pthread_rwlock_init(&tpllistlock, NULL);
3945 }
3946
3947 static void __attribute__ ((destructor))
3948 stats_destructor(void)
3949 {
3950
3951 pthread_rwlock_destroy(&tpllistlock);
3952 }
3953
3954 #endif /* _KERNEL */
3955