diff options
Diffstat (limited to 'sbin')
| -rw-r--r-- | sbin/camcontrol/camcontrol.8 | 18 | ||||
| -rw-r--r-- | sbin/camcontrol/camcontrol.c | 107 |
2 files changed, 115 insertions, 10 deletions
diff --git a/sbin/camcontrol/camcontrol.8 b/sbin/camcontrol/camcontrol.8 index 7163bed..bfaa1bb 100644 --- a/sbin/camcontrol/camcontrol.8 +++ b/sbin/camcontrol/camcontrol.8 @@ -102,10 +102,10 @@ .Op device id .Nm .Ic rescan -.Aq all | bus Ns Op :target:lun +.Aq all | device id | bus Ns Op :target:lun .Nm .Ic reset -.Aq all | bus Ns Op :target:lun +.Aq all | device id | bus Ns Op :target:lun .Nm .Ic defects .Op device id @@ -553,12 +553,20 @@ start bit cleared and the load/eject bit set. .It Ic rescan Tell the kernel to scan all busses in the system (with the .Ar all -argument), the given bus (XPT_SCAN_BUS), or bus:target:lun +argument), the given bus (XPT_SCAN_BUS), bus:target:lun or device (XPT_SCAN_LUN) for new devices or devices that have gone away. The user may specify a scan of all busses, a single bus, or a lun. Scanning all luns on a target is not supported. +.Pp +If a device is specified by peripheral name and unit number, for instance +da4, it may only be rescanned if that device currently exists in the CAM EDT +(Existing Device Table). +If the device is no longer there (see +.Nm +devlist ), +you must use the bus:target:lun form to rescan it. .It Ic reprobe Tell the kernel to refresh the information about the device and notify the upper layer, @@ -568,8 +576,8 @@ the disk size visible to the rest of the system. .It Ic reset Tell the kernel to reset all busses in the system (with the .Ar all -argument) or the given bus (XPT_RESET_BUS) by issuing a SCSI bus -reset for that bus, or to reset the given bus:target:lun +argument), the given bus (XPT_RESET_BUS) by issuing a SCSI bus +reset for that bus, or to reset the given bus:target:lun or device (XPT_RESET_DEV), typically by issuing a BUS DEVICE RESET message after connecting to that device. Note that this can have a destructive impact diff --git a/sbin/camcontrol/camcontrol.c b/sbin/camcontrol/camcontrol.c index 77a0e44..37a7eb2 100644 --- a/sbin/camcontrol/camcontrol.c +++ b/sbin/camcontrol/camcontrol.c @@ -3126,12 +3126,107 @@ dorescan_or_reset(int argc, char **argv, int rescan) tstr++; if (strncasecmp(tstr, "all", strlen("all")) == 0) arglist |= CAM_ARG_BUS; - else { + else if (isdigit(*tstr)) { rv = parse_btl(argv[optind], &bus, &target, &lun, &arglist); if (rv != 1 && rv != 3) { warnx(must, rescan? "rescan" : "reset"); return(1); } + } else { + char name[30]; + int unit; + int fd = -1; + union ccb ccb; + + /* + * Note that resetting or rescanning a device used to + * require a bus or bus:target:lun. This is because the + * device in question may not exist and you're trying to + * get the controller to rescan to find it. It may also be + * because the device is hung / unresponsive, and opening + * an unresponsive device is not desireable. + * + * It can be more convenient to reference a device by + * peripheral name and unit number, though, and it is + * possible to get the bus:target:lun for devices that + * currently exist in the EDT. So this can work for + * devices that we want to reset, or devices that exist + * that we want to rescan, but not devices that do not + * exist yet. + * + * So, we are careful here to look up the bus/target/lun + * for the device the user wants to operate on, specified + * by peripheral instance (e.g. da0, pass32) without + * actually opening that device. The process is similar to + * what cam_lookup_pass() does, except that we don't + * actually open the passthrough driver instance in the end. + */ + + if (cam_get_device(tstr, name, sizeof(name), &unit) == -1) { + warnx("%s", cam_errbuf); + error = 1; + goto bailout; + } + + if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) { + warn("Unable to open %s", XPT_DEVICE); + error = 1; + goto bailout; + } + + bzero(&ccb, sizeof(ccb)); + + /* + * The function code isn't strictly necessary for the + * GETPASSTHRU ioctl. + */ + ccb.ccb_h.func_code = XPT_GDEVLIST; + + /* + * These two are necessary for the GETPASSTHRU ioctl to + * work. + */ + strlcpy(ccb.cgdl.periph_name, name, + sizeof(ccb.cgdl.periph_name)); + ccb.cgdl.unit_number = unit; + + /* + * Attempt to get the passthrough device. This ioctl will + * fail if the device name is null, if the device doesn't + * exist, or if the passthrough driver isn't in the kernel. + */ + if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) { + warn("Unable to find bus:target:lun for device %s%d", + name, unit); + error = 1; + close(fd); + goto bailout; + } + if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { + const struct cam_status_entry *entry; + + entry = cam_fetch_status_entry(ccb.ccb_h.status); + warnx("Unable to find bus:target_lun for device %s%d, " + "CAM status: %s (%#x)", name, unit, + entry ? entry->status_text : "Unknown", + ccb.ccb_h.status); + error = 1; + close(fd); + goto bailout; + } + + /* + * The kernel fills in the bus/target/lun. We don't + * need the passthrough device name and unit number since + * we aren't going to open it. + */ + bus = ccb.ccb_h.path_id; + target = ccb.ccb_h.target_id; + lun = ccb.ccb_h.target_lun; + + arglist |= CAM_ARG_BUS | CAM_ARG_TARGET | CAM_ARG_LUN; + + close(fd); } if ((arglist & CAM_ARG_BUS) @@ -3141,6 +3236,8 @@ dorescan_or_reset(int argc, char **argv, int rescan) else error = rescan_or_reset_bus(bus, rescan); +bailout: + return(error); } @@ -8739,8 +8836,8 @@ usage(int printlong) " camcontrol eject [dev_id][generic args]\n" " camcontrol reprobe [dev_id][generic args]\n" #endif /* MINIMALISTIC */ -" camcontrol rescan <all | bus[:target:lun]>\n" -" camcontrol reset <all | bus[:target:lun]>\n" +" camcontrol rescan <all | bus[:target:lun] | dev_id>\n" +" camcontrol reset <all | bus[:target:lun] | dev_id>\n" #ifndef MINIMALISTIC " camcontrol defects [dev_id][generic args] <-f format> [-P][-G]\n" " [-q][-s][-S offset][-X]\n" @@ -8811,8 +8908,8 @@ usage(int printlong) "load send a Start Unit command to the device with the load bit set\n" "eject send a Stop Unit command to the device with the eject bit set\n" "reprobe update capacity information of the given device\n" -"rescan rescan all busses, the given bus, or bus:target:lun\n" -"reset reset all busses, the given bus, or bus:target:lun\n" +"rescan rescan all buses, the given bus, bus:target:lun or device\n" +"reset reset all buses, the given bus, bus:target:lun or device\n" "defects read the defect list of the specified device\n" "modepage display or edit (-e) the given mode page\n" "cmd send the given SCSI command, may need -i or -o as well\n" |
