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- /*
- * Copyright (c) 2009-2013 Willem Dijkstra
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <sys/ata.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <strings.h>
- #include <string.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <camlib.h>
- #include <cam/cam_ccb.h>
- #include "conf.h"
- #include "data.h"
- #include "error.h"
- #include "xmalloc.h"
- #include "smart.h"
- #include "diskname.h"
- #ifdef HAS_IOCATAREQUEST
- #ifndef HAS_ATA_SMART_CMD
- #define ATA_SMART_CMD 0xb0
- #endif
- #define MSG_SIMPLE_Q_TAG 0x20
- /* per drive storage structure */
- struct smart_device {
- struct smart_values data;
- struct ata_ioc_request cmd;
- struct cam_device *cd;
- struct ccb_ataio ccb;
- char name[MAX_PATH_LEN];
- int fd;
- int type;
- int failed;
- };
- static struct smart_device *smart_devs = NULL;
- static int smart_cur = 0;
- void
- init_smart(struct stream *st)
- {
- struct disknamectx c;
- int fd;
- int i;
- char drivename[MAX_PATH_LEN];
- struct ata_ioc_request *pa;
- struct cam_device *cd;
- struct ccb_ataio *pc;
- if (sizeof(struct smart_values) != DISK_BLOCK_LEN) {
- fatal("smart: internal error: smart values structure is broken");
- }
- if (st->arg == NULL) {
- fatal("smart: need a <disk device|name> argument");
- }
- initdisknamectx(&c, st->arg, drivename, sizeof(drivename));
- fd = -1;
- cd = NULL;
- while (nextdiskname(&c)) {
- if ((cd = cam_open_device(drivename, O_RDWR)) != NULL)
- break;
- if ((fd = open(drivename, O_RDONLY, O_NONBLOCK)) != -1)
- break;
- }
- if ((fd < 0) && (cd == NULL))
- fatal("smart: cannot open '%.200s'", st->arg);
- /* look for drive in our global table */
- for (i = 0; i < smart_cur; i++) {
- if (strncmp(smart_devs[i].name, drivename, MAX_PATH_LEN) == 0) {
- st->parg.smart = i;
- return;
- }
- }
- /* this is a new drive; allocate the command and data block */
- if (smart_cur > SYMON_MAX_DOBJECTS) {
- fatal("%s:%d: dynamic object limit (%d) exceeded for smart data",
- __FILE__, __LINE__, SYMON_MAX_DOBJECTS);
- }
- smart_devs = xrealloc(smart_devs, (smart_cur + 1) * sizeof(struct smart_device));
- bzero(&smart_devs[smart_cur], sizeof(struct smart_device));
- /* rewire all bufferlocations, as our addresses may have changed */
- for (i = 0; i <= smart_cur; i++) {
- smart_devs[i].cmd.data = (caddr_t)&smart_devs[i].data;
- smart_devs[i].ccb.data_ptr = (u_int8_t *)&smart_devs[i].data;
- }
- /* store drivename in new block */
- snprintf(smart_devs[smart_cur].name, MAX_PATH_LEN, "%s", drivename);
- /* store filedescriptor to device */
- if (fd > 0) {
- smart_devs[smart_cur].fd = fd;
- /* populate ata command header */
- pa = &smart_devs[smart_cur].cmd;
- pa->u.ata.command = ATA_SMART_CMD;
- pa->timeout = SMART_TIMEOUT;
- pa->u.ata.feature = ATA_SMART_READ_VALUES;
- pa->u.ata.lba = SMART_CYLINDER << 8;
- pa->flags = ATA_CMD_READ;
- pa->count = DISK_BLOCK_LEN;
- } else if (cd) {
- smart_devs[smart_cur].cd = cd;
- /* populate cam control block */
- pc = &smart_devs[smart_cur].ccb;
- cam_fill_ataio(pc,
- 0, /* retries */
- NULL, /* completion callback */
- CAM_DIR_IN, /* flags */
- MSG_SIMPLE_Q_TAG, /* tag_action */
- (u_int8_t *)&smart_devs[smart_cur].data,
- DISK_BLOCK_LEN,
- SMART_TIMEOUT); /* timeout (s) */
- /* disable queue freeze on error */
- pc->ccb_h.flags |= CAM_DEV_QFRZDIS;
- /* populate ata command header */
- pc->cmd.flags = CAM_ATAIO_NEEDRESULT;
- pc->cmd.command = ATA_SMART_CMD;
- pc->cmd.features = ATA_SMART_READ_VALUES;
- pc->cmd.lba_low = 0;
- pc->cmd.lba_mid = SMART_CYLINDER & 0xff;
- pc->cmd.lba_high = (SMART_CYLINDER >> 8) & 0xff;
- pc->cmd.lba_low_exp = 0;
- pc->cmd.lba_mid_exp = 0;
- pc->cmd.lba_high_exp = 0;
- pc->cmd.sector_count = 1;
- pc->cmd.sector_count_exp = 0;
- }
- /* store smart dev entry in stream to facilitate quick get */
- st->parg.smart = smart_cur;
- smart_cur++;
- info("started module smart(%.200s)", st->arg);
- }
- void
- gets_smart()
- {
- int i;
- for (i = 0; i < smart_cur; i++) {
- if (smart_devs[i].fd > 0) {
- if (ioctl(smart_devs[i].fd, IOCATAREQUEST, &smart_devs[i].cmd) || smart_devs[i].cmd.error) {
- warning("smart: ioctl for drive '%s' failed: %s",
- &smart_devs[i].name, strerror(errno));
- smart_devs[i].failed = 1;
- continue;
- }
- /* Some drives do not calculate the smart checksum correctly;
- * additional code that identifies these drives would increase our
- * footprint and the amount of datajuggling we need to do; we would
- * rather ignore the checksums.
- */
- smart_devs[i].failed = 0;
- } else if (smart_devs[i].cd != NULL) {
- if ((cam_send_ccb(smart_devs[i].cd, (union ccb *)&smart_devs[i].ccb) < 0) || smart_devs[i].ccb.res.error) {
- warning("smart: ccb for drive '%s' failed: %s",
- &smart_devs[i].name,
- cam_error_string(smart_devs[i].cd, (union ccb *)&smart_devs[i].ccb,
- (char *)&smart_devs[i].data, DISK_BLOCK_LEN,
- CAM_ESF_ALL, CAM_EPF_ALL));
- smart_devs[i].failed = 1;
- continue;
- }
- smart_devs[i].failed = 0;
- }
- }
- return;
- }
- int
- get_smart(char *symon_buf, int maxlen, struct stream *st)
- {
- struct smart_report sr;
- if ((st->parg.smart < smart_cur) &&
- (!smart_devs[st->parg.smart].failed))
- {
- smart_parse(&smart_devs[st->parg.smart].data, &sr);
- return snpack(symon_buf, maxlen, st->arg, MT_SMART,
- sr.read_error_rate,
- sr.reallocated_sectors,
- sr.spin_retries,
- sr.air_flow_temp,
- sr.temperature,
- sr.reallocations,
- sr.current_pending,
- sr.uncorrectables,
- sr.soft_read_error_rate,
- sr.g_sense_error_rate,
- sr.temperature2,
- sr.free_fall_protection);
- }
- return 0;
- }
- #else
- void
- init_smart(struct stream *st)
- {
- fatal("smart module not available");
- }
- void
- gets_smart()
- {
- fatal("smart module not available");
- }
- int
- get_smart(char *symon_buf, int maxlen, struct stream *st)
- {
- fatal("io module not available");
- /* NOT REACHED */
- return 0;
- }
- #endif
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