subr_iostat.c revision 1.1.2.2
1 1.1.2.2 elad /* $NetBSD: subr_iostat.c,v 1.1.2.2 2006/04/19 05:14:00 elad Exp $ */ 2 1.1.2.2 elad /* NetBSD: subr_disk.c,v 1.69 2005/05/29 22:24:15 christos Exp */ 3 1.1.2.2 elad 4 1.1.2.2 elad /*- 5 1.1.2.2 elad * Copyright (c) 1996, 1997, 1999, 2000 The NetBSD Foundation, Inc. 6 1.1.2.2 elad * All rights reserved. 7 1.1.2.2 elad * 8 1.1.2.2 elad * This code is derived from software contributed to The NetBSD Foundation 9 1.1.2.2 elad * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 1.1.2.2 elad * NASA Ames Research Center. 11 1.1.2.2 elad * 12 1.1.2.2 elad * Redistribution and use in source and binary forms, with or without 13 1.1.2.2 elad * modification, are permitted provided that the following conditions 14 1.1.2.2 elad * are met: 15 1.1.2.2 elad * 1. Redistributions of source code must retain the above copyright 16 1.1.2.2 elad * notice, this list of conditions and the following disclaimer. 17 1.1.2.2 elad * 2. Redistributions in binary form must reproduce the above copyright 18 1.1.2.2 elad * notice, this list of conditions and the following disclaimer in the 19 1.1.2.2 elad * documentation and/or other materials provided with the distribution. 20 1.1.2.2 elad * 3. All advertising materials mentioning features or use of this software 21 1.1.2.2 elad * must display the following acknowledgement: 22 1.1.2.2 elad * This product includes software developed by the NetBSD 23 1.1.2.2 elad * Foundation, Inc. and its contributors. 24 1.1.2.2 elad * 4. Neither the name of The NetBSD Foundation nor the names of its 25 1.1.2.2 elad * contributors may be used to endorse or promote products derived 26 1.1.2.2 elad * from this software without specific prior written permission. 27 1.1.2.2 elad * 28 1.1.2.2 elad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 1.1.2.2 elad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 1.1.2.2 elad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 1.1.2.2 elad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 1.1.2.2 elad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 1.1.2.2 elad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 1.1.2.2 elad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 1.1.2.2 elad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 1.1.2.2 elad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 1.1.2.2 elad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 1.1.2.2 elad * POSSIBILITY OF SUCH DAMAGE. 39 1.1.2.2 elad */ 40 1.1.2.2 elad 41 1.1.2.2 elad /* 42 1.1.2.2 elad * Copyright (c) 1982, 1986, 1988, 1993 43 1.1.2.2 elad * The Regents of the University of California. All rights reserved. 44 1.1.2.2 elad * (c) UNIX System Laboratories, Inc. 45 1.1.2.2 elad * All or some portions of this file are derived from material licensed 46 1.1.2.2 elad * to the University of California by American Telephone and Telegraph 47 1.1.2.2 elad * Co. or Unix System Laboratories, Inc. and are reproduced herein with 48 1.1.2.2 elad * the permission of UNIX System Laboratories, Inc. 49 1.1.2.2 elad * 50 1.1.2.2 elad * Redistribution and use in source and binary forms, with or without 51 1.1.2.2 elad * modification, are permitted provided that the following conditions 52 1.1.2.2 elad * are met: 53 1.1.2.2 elad * 1. Redistributions of source code must retain the above copyright 54 1.1.2.2 elad * notice, this list of conditions and the following disclaimer. 55 1.1.2.2 elad * 2. Redistributions in binary form must reproduce the above copyright 56 1.1.2.2 elad * notice, this list of conditions and the following disclaimer in the 57 1.1.2.2 elad * documentation and/or other materials provided with the distribution. 58 1.1.2.2 elad * 3. Neither the name of the University nor the names of its contributors 59 1.1.2.2 elad * may be used to endorse or promote products derived from this software 60 1.1.2.2 elad * without specific prior written permission. 61 1.1.2.2 elad * 62 1.1.2.2 elad * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 1.1.2.2 elad * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 1.1.2.2 elad * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 1.1.2.2 elad * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 1.1.2.2 elad * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 1.1.2.2 elad * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 1.1.2.2 elad * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 1.1.2.2 elad * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 1.1.2.2 elad * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 1.1.2.2 elad * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 1.1.2.2 elad * SUCH DAMAGE. 73 1.1.2.2 elad * 74 1.1.2.2 elad * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94 75 1.1.2.2 elad */ 76 1.1.2.2 elad 77 1.1.2.2 elad #include <sys/cdefs.h> 78 1.1.2.2 elad __KERNEL_RCSID(0, "$NetBSD: subr_iostat.c,v 1.1.2.2 2006/04/19 05:14:00 elad Exp $"); 79 1.1.2.2 elad 80 1.1.2.2 elad #include "opt_compat_netbsd.h" 81 1.1.2.2 elad 82 1.1.2.2 elad #include <sys/param.h> 83 1.1.2.2 elad #include <sys/kernel.h> 84 1.1.2.2 elad #include <sys/malloc.h> 85 1.1.2.2 elad #include <sys/buf.h> 86 1.1.2.2 elad #include <sys/bufq.h> 87 1.1.2.2 elad #include <sys/syslog.h> 88 1.1.2.2 elad #include <sys/disklabel.h> 89 1.1.2.2 elad #include <sys/disk.h> 90 1.1.2.2 elad #include <sys/sysctl.h> 91 1.1.2.2 elad #include <lib/libkern/libkern.h> 92 1.1.2.2 elad 93 1.1.2.2 elad /* 94 1.1.2.2 elad * Function prototypes for sysctl nodes 95 1.1.2.2 elad */ 96 1.1.2.2 elad static int sysctl_hw_disknames(SYSCTLFN_PROTO); 97 1.1.2.2 elad static int sysctl_hw_iostatnames(SYSCTLFN_PROTO); 98 1.1.2.2 elad static int sysctl_hw_iostats(SYSCTLFN_PROTO); 99 1.1.2.2 elad 100 1.1.2.2 elad static int 101 1.1.2.2 elad iostati_getnames(int disk_only, char *oldp, size_t *oldlenp, const void *newp, 102 1.1.2.2 elad u_int namelen); 103 1.1.2.2 elad 104 1.1.2.2 elad /* 105 1.1.2.2 elad * A global list of all drives attached to the system. May grow or 106 1.1.2.2 elad * shrink over time. 107 1.1.2.2 elad */ 108 1.1.2.2 elad struct iostatlist_head iostatlist = TAILQ_HEAD_INITIALIZER(iostatlist); 109 1.1.2.2 elad int iostat_count; /* number of drives in global drivelist */ 110 1.1.2.2 elad struct simplelock iostatlist_slock = SIMPLELOCK_INITIALIZER; 111 1.1.2.2 elad 112 1.1.2.2 elad /* 113 1.1.2.2 elad * Searches the iostatlist for the iostat corresponding to the 114 1.1.2.2 elad * name provided. 115 1.1.2.2 elad */ 116 1.1.2.2 elad struct io_stats * 117 1.1.2.2 elad iostat_find(char *name) 118 1.1.2.2 elad { 119 1.1.2.2 elad struct io_stats *iostatp; 120 1.1.2.2 elad 121 1.1.2.2 elad if ((name == NULL) || (iostat_count <= 0)) 122 1.1.2.2 elad return (NULL); 123 1.1.2.2 elad 124 1.1.2.2 elad simple_lock(&iostatlist_slock); 125 1.1.2.2 elad for (iostatp = TAILQ_FIRST(&iostatlist); iostatp != NULL; 126 1.1.2.2 elad iostatp = TAILQ_NEXT(iostatp, link)) 127 1.1.2.2 elad if (strcmp(iostatp->name, name) == 0) { 128 1.1.2.2 elad simple_unlock(&iostatlist_slock); 129 1.1.2.2 elad return (iostatp); 130 1.1.2.2 elad } 131 1.1.2.2 elad simple_unlock(&iostatlist_slock); 132 1.1.2.2 elad 133 1.1.2.2 elad return (NULL); 134 1.1.2.2 elad } 135 1.1.2.2 elad 136 1.1.2.2 elad /* 137 1.1.2.2 elad * Allocate and initialise memory for the i/o statistics. 138 1.1.2.2 elad */ 139 1.1.2.2 elad struct 140 1.1.2.2 elad io_stats *iostat_alloc(int32_t type) 141 1.1.2.2 elad { 142 1.1.2.2 elad int s; 143 1.1.2.2 elad struct io_stats *stats; 144 1.1.2.2 elad 145 1.1.2.2 elad stats = malloc(sizeof(struct io_stats), M_DEVBUF, M_NOWAIT); 146 1.1.2.2 elad 147 1.1.2.2 elad if (stats == NULL) 148 1.1.2.2 elad panic("iostat_alloc: cannot allocate memory for stats " 149 1.1.2.2 elad "buffer"); 150 1.1.2.2 elad 151 1.1.2.2 elad stats->type = type; 152 1.1.2.2 elad stats->rxfer = 0; 153 1.1.2.2 elad stats->rbytes = 0; 154 1.1.2.2 elad stats->wxfer = 0; 155 1.1.2.2 elad stats->wbytes = 0; 156 1.1.2.2 elad 157 1.1.2.2 elad /* 158 1.1.2.2 elad * Set the attached timestamp. 159 1.1.2.2 elad */ 160 1.1.2.2 elad s = splclock(); 161 1.1.2.2 elad stats->attachtime = mono_time; 162 1.1.2.2 elad splx(s); 163 1.1.2.2 elad 164 1.1.2.2 elad timerclear(&stats->time); 165 1.1.2.2 elad timerclear(&stats->timestamp); 166 1.1.2.2 elad 167 1.1.2.2 elad /* 168 1.1.2.2 elad * Link into the drivelist. 169 1.1.2.2 elad */ 170 1.1.2.2 elad simple_lock(&iostatlist_slock); 171 1.1.2.2 elad TAILQ_INSERT_TAIL(&iostatlist, stats, link); 172 1.1.2.2 elad iostat_count++; 173 1.1.2.2 elad simple_unlock(&iostatlist_slock); 174 1.1.2.2 elad 175 1.1.2.2 elad return stats; 176 1.1.2.2 elad } 177 1.1.2.2 elad 178 1.1.2.2 elad /* 179 1.1.2.2 elad * Remove i/o from stats collection. 180 1.1.2.2 elad */ 181 1.1.2.2 elad void 182 1.1.2.2 elad iostat_free(struct io_stats *stats) 183 1.1.2.2 elad { 184 1.1.2.2 elad 185 1.1.2.2 elad /* 186 1.1.2.2 elad * Remove from the iostat list. 187 1.1.2.2 elad */ 188 1.1.2.2 elad if (iostat_count == 0) 189 1.1.2.2 elad panic("iostat_free: iostat_count == 0"); 190 1.1.2.2 elad simple_lock(&iostatlist_slock); 191 1.1.2.2 elad TAILQ_REMOVE(&iostatlist, stats, link); 192 1.1.2.2 elad iostat_count--; 193 1.1.2.2 elad simple_unlock(&iostatlist_slock); 194 1.1.2.2 elad free(stats, M_DEVBUF); 195 1.1.2.2 elad } 196 1.1.2.2 elad 197 1.1.2.2 elad /* 198 1.1.2.2 elad * Increment a iostat busy counter. If the counter is going from 199 1.1.2.2 elad * 0 to 1, set the timestamp. 200 1.1.2.2 elad */ 201 1.1.2.2 elad void 202 1.1.2.2 elad iostat_busy(struct io_stats *stats) 203 1.1.2.2 elad { 204 1.1.2.2 elad int s; 205 1.1.2.2 elad 206 1.1.2.2 elad /* 207 1.1.2.2 elad * XXX We'd like to use something as accurate as microtime(), 208 1.1.2.2 elad * but that doesn't depend on the system TOD clock. 209 1.1.2.2 elad */ 210 1.1.2.2 elad if (stats->busy++ == 0) { 211 1.1.2.2 elad s = splclock(); 212 1.1.2.2 elad stats->timestamp = mono_time; 213 1.1.2.2 elad splx(s); 214 1.1.2.2 elad } 215 1.1.2.2 elad } 216 1.1.2.2 elad 217 1.1.2.2 elad /* 218 1.1.2.2 elad * Decrement a iostat busy counter, increment the byte count, total busy 219 1.1.2.2 elad * time, and reset the timestamp. 220 1.1.2.2 elad */ 221 1.1.2.2 elad void 222 1.1.2.2 elad iostat_unbusy(struct io_stats *stats, long bcount, int read) 223 1.1.2.2 elad { 224 1.1.2.2 elad int s; 225 1.1.2.2 elad struct timeval dv_time, diff_time; 226 1.1.2.2 elad 227 1.1.2.2 elad if (stats->busy-- == 0) { 228 1.1.2.2 elad printf("%s: busy < 0\n", stats->name); 229 1.1.2.2 elad panic("iostat_unbusy"); 230 1.1.2.2 elad } 231 1.1.2.2 elad 232 1.1.2.2 elad s = splclock(); 233 1.1.2.2 elad dv_time = mono_time; 234 1.1.2.2 elad splx(s); 235 1.1.2.2 elad 236 1.1.2.2 elad timersub(&dv_time, &stats->timestamp, &diff_time); 237 1.1.2.2 elad timeradd(&stats->time, &diff_time, &stats->time); 238 1.1.2.2 elad 239 1.1.2.2 elad stats->timestamp = dv_time; 240 1.1.2.2 elad if (bcount > 0) { 241 1.1.2.2 elad if (read) { 242 1.1.2.2 elad stats->rbytes += bcount; 243 1.1.2.2 elad stats->rxfer++; 244 1.1.2.2 elad } else { 245 1.1.2.2 elad stats->wbytes += bcount; 246 1.1.2.2 elad stats->wxfer++; 247 1.1.2.2 elad } 248 1.1.2.2 elad } 249 1.1.2.2 elad } 250 1.1.2.2 elad 251 1.1.2.2 elad /* 252 1.1.2.2 elad * Increment the seek counter. This does look almost redundant but it 253 1.1.2.2 elad * abstracts the stats gathering. 254 1.1.2.2 elad */ 255 1.1.2.2 elad void 256 1.1.2.2 elad iostat_seek(struct io_stats *stats) 257 1.1.2.2 elad { 258 1.1.2.2 elad stats->seek++; 259 1.1.2.2 elad } 260 1.1.2.2 elad 261 1.1.2.2 elad static int 262 1.1.2.2 elad sysctl_hw_disknames(SYSCTLFN_ARGS) 263 1.1.2.2 elad { 264 1.1.2.2 elad return iostati_getnames(1, oldp, oldlenp, newp, namelen); 265 1.1.2.2 elad } 266 1.1.2.2 elad 267 1.1.2.2 elad static int 268 1.1.2.2 elad sysctl_hw_iostatnames(SYSCTLFN_ARGS) 269 1.1.2.2 elad { 270 1.1.2.2 elad return iostati_getnames(0, oldp, oldlenp, newp, namelen); 271 1.1.2.2 elad } 272 1.1.2.2 elad 273 1.1.2.2 elad static int 274 1.1.2.2 elad iostati_getnames(int disk_only, char *oldp, size_t *oldlenp, const void *newp, 275 1.1.2.2 elad u_int namelen) 276 1.1.2.2 elad { 277 1.1.2.2 elad char bf[IOSTATNAMELEN + 1]; 278 1.1.2.2 elad char *where = oldp; 279 1.1.2.2 elad struct io_stats *stats; 280 1.1.2.2 elad size_t needed, left, slen; 281 1.1.2.2 elad int error, first; 282 1.1.2.2 elad 283 1.1.2.2 elad if (newp != NULL) 284 1.1.2.2 elad return (EPERM); 285 1.1.2.2 elad if (namelen != 0) 286 1.1.2.2 elad return (EINVAL); 287 1.1.2.2 elad 288 1.1.2.2 elad first = 1; 289 1.1.2.2 elad error = 0; 290 1.1.2.2 elad needed = 0; 291 1.1.2.2 elad left = *oldlenp; 292 1.1.2.2 elad 293 1.1.2.2 elad simple_lock(&iostatlist_slock); 294 1.1.2.2 elad for (stats = TAILQ_FIRST(&iostatlist); stats != NULL; 295 1.1.2.2 elad stats = TAILQ_NEXT(stats, link)) { 296 1.1.2.2 elad if ((disk_only == 1) && (stats->type != IOSTAT_DISK)) 297 1.1.2.2 elad continue; 298 1.1.2.2 elad 299 1.1.2.2 elad if (where == NULL) 300 1.1.2.2 elad needed += strlen(stats->name) + 1; 301 1.1.2.2 elad else { 302 1.1.2.2 elad memset(bf, 0, sizeof(bf)); 303 1.1.2.2 elad if (first) { 304 1.1.2.2 elad strncpy(bf, stats->name, sizeof(bf)); 305 1.1.2.2 elad first = 0; 306 1.1.2.2 elad } else { 307 1.1.2.2 elad bf[0] = ' '; 308 1.1.2.2 elad strncpy(bf + 1, stats->name, 309 1.1.2.2 elad sizeof(bf) - 1); 310 1.1.2.2 elad } 311 1.1.2.2 elad bf[IOSTATNAMELEN] = '\0'; 312 1.1.2.2 elad slen = strlen(bf); 313 1.1.2.2 elad if (left < slen + 1) 314 1.1.2.2 elad break; 315 1.1.2.2 elad /* +1 to copy out the trailing NUL byte */ 316 1.1.2.2 elad error = copyout(bf, where, slen + 1); 317 1.1.2.2 elad if (error) 318 1.1.2.2 elad break; 319 1.1.2.2 elad where += slen; 320 1.1.2.2 elad needed += slen; 321 1.1.2.2 elad left -= slen; 322 1.1.2.2 elad } 323 1.1.2.2 elad } 324 1.1.2.2 elad simple_unlock(&iostatlist_slock); 325 1.1.2.2 elad *oldlenp = needed; 326 1.1.2.2 elad return (error); 327 1.1.2.2 elad } 328 1.1.2.2 elad 329 1.1.2.2 elad static int 330 1.1.2.2 elad sysctl_hw_iostats(SYSCTLFN_ARGS) 331 1.1.2.2 elad { 332 1.1.2.2 elad struct io_sysctl sdrive; 333 1.1.2.2 elad struct io_stats *stats; 334 1.1.2.2 elad char *where = oldp; 335 1.1.2.2 elad size_t tocopy, left; 336 1.1.2.2 elad int error; 337 1.1.2.2 elad 338 1.1.2.2 elad if (newp != NULL) 339 1.1.2.2 elad return (EPERM); 340 1.1.2.2 elad 341 1.1.2.2 elad /* 342 1.1.2.2 elad * The original hw.diskstats call was broken and did not require 343 1.1.2.2 elad * the userland to pass in it's size of struct disk_sysctl. This 344 1.1.2.2 elad * was fixed after NetBSD 1.6 was released, and any applications 345 1.1.2.2 elad * that do not pass in the size are given an error only, unless 346 1.1.2.2 elad * we care about 1.6 compatibility. 347 1.1.2.2 elad */ 348 1.1.2.2 elad if (namelen == 0) 349 1.1.2.2 elad #ifdef COMPAT_16 350 1.1.2.2 elad tocopy = offsetof(struct io_sysctl, busy); 351 1.1.2.2 elad #else 352 1.1.2.2 elad return (EINVAL); 353 1.1.2.2 elad #endif 354 1.1.2.2 elad else 355 1.1.2.2 elad tocopy = name[0]; 356 1.1.2.2 elad 357 1.1.2.2 elad if (where == NULL) { 358 1.1.2.2 elad *oldlenp = iostat_count * tocopy; 359 1.1.2.2 elad return (0); 360 1.1.2.2 elad } 361 1.1.2.2 elad 362 1.1.2.2 elad error = 0; 363 1.1.2.2 elad left = *oldlenp; 364 1.1.2.2 elad memset(&sdrive, 0, sizeof(sdrive)); 365 1.1.2.2 elad *oldlenp = 0; 366 1.1.2.2 elad 367 1.1.2.2 elad simple_lock(&iostatlist_slock); 368 1.1.2.2 elad TAILQ_FOREACH(stats, &iostatlist, link) { 369 1.1.2.2 elad if (left < tocopy) 370 1.1.2.2 elad break; 371 1.1.2.2 elad strncpy(sdrive.name, stats->name, sizeof(sdrive.name)); 372 1.1.2.2 elad sdrive.xfer = stats->rxfer + stats->wxfer; 373 1.1.2.2 elad sdrive.rxfer = stats->rxfer; 374 1.1.2.2 elad sdrive.wxfer = stats->wxfer; 375 1.1.2.2 elad sdrive.seek = stats->seek; 376 1.1.2.2 elad sdrive.bytes = stats->rbytes + stats->wbytes; 377 1.1.2.2 elad sdrive.rbytes = stats->rbytes; 378 1.1.2.2 elad sdrive.wbytes = stats->wbytes; 379 1.1.2.2 elad sdrive.attachtime_sec = stats->attachtime.tv_sec; 380 1.1.2.2 elad sdrive.attachtime_usec = stats->attachtime.tv_usec; 381 1.1.2.2 elad sdrive.timestamp_sec = stats->timestamp.tv_sec; 382 1.1.2.2 elad sdrive.timestamp_usec = stats->timestamp.tv_usec; 383 1.1.2.2 elad sdrive.time_sec = stats->time.tv_sec; 384 1.1.2.2 elad sdrive.time_usec = stats->time.tv_usec; 385 1.1.2.2 elad sdrive.busy = stats->busy; 386 1.1.2.2 elad 387 1.1.2.2 elad error = copyout(&sdrive, where, min(tocopy, sizeof(sdrive))); 388 1.1.2.2 elad if (error) 389 1.1.2.2 elad break; 390 1.1.2.2 elad where += tocopy; 391 1.1.2.2 elad *oldlenp += tocopy; 392 1.1.2.2 elad left -= tocopy; 393 1.1.2.2 elad } 394 1.1.2.2 elad simple_unlock(&iostatlist_slock); 395 1.1.2.2 elad return (error); 396 1.1.2.2 elad } 397 1.1.2.2 elad 398 1.1.2.2 elad SYSCTL_SETUP(sysctl_io_stats_setup, "sysctl i/o stats setup") 399 1.1.2.2 elad { 400 1.1.2.2 elad sysctl_createv(clog, 0, NULL, NULL, 401 1.1.2.2 elad CTLFLAG_PERMANENT, 402 1.1.2.2 elad CTLTYPE_STRING, "disknames", 403 1.1.2.2 elad SYSCTL_DESCR("List of disk drives present"), 404 1.1.2.2 elad sysctl_hw_disknames, 0, NULL, 0, 405 1.1.2.2 elad CTL_HW, HW_DISKNAMES, CTL_EOL); 406 1.1.2.2 elad sysctl_createv(clog, 0, NULL, NULL, 407 1.1.2.2 elad CTLFLAG_PERMANENT, 408 1.1.2.2 elad CTLTYPE_STRING, "iostatnames", 409 1.1.2.2 elad SYSCTL_DESCR("I/O stats are being collected for these" 410 1.1.2.2 elad " devices"), 411 1.1.2.2 elad sysctl_hw_iostatnames, 0, NULL, 0, 412 1.1.2.2 elad CTL_HW, HW_IOSTATNAMES, CTL_EOL); 413 1.1.2.2 elad sysctl_createv(clog, 0, NULL, NULL, 414 1.1.2.2 elad CTLFLAG_PERMANENT, 415 1.1.2.2 elad CTLTYPE_STRUCT, "drivestats", 416 1.1.2.2 elad SYSCTL_DESCR("Statistics on device I/O operations"), 417 1.1.2.2 elad sysctl_hw_iostats, 0, NULL, 0, 418 1.1.2.2 elad CTL_HW, HW_IOSTATS, CTL_EOL); 419 1.1.2.2 elad } 420
Indexes created Wed Sep 24 14:09:57 GMT 2025