diff options
Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 147 |
1 files changed, 123 insertions, 24 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 1cca21aafaba..5b1cd8d6e971 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -692,18 +692,20 @@ dasd_eckd_cdl_reclen(int recid) /* * Generate device unique id that specifies the physical device. */ -static int dasd_eckd_generate_uid(struct dasd_device *device, - struct dasd_uid *uid) +static int dasd_eckd_generate_uid(struct dasd_device *device) { struct dasd_eckd_private *private; + struct dasd_uid *uid; int count; + unsigned long flags; private = (struct dasd_eckd_private *) device->private; if (!private) return -ENODEV; if (!private->ned || !private->gneq) return -ENODEV; - + uid = &private->uid; + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); memset(uid, 0, sizeof(struct dasd_uid)); memcpy(uid->vendor, private->ned->HDA_manufacturer, sizeof(uid->vendor) - 1); @@ -726,9 +728,25 @@ static int dasd_eckd_generate_uid(struct dasd_device *device, private->vdsneq->uit[count]); } } + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); return 0; } +static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) +{ + struct dasd_eckd_private *private; + unsigned long flags; + + if (device->private) { + private = (struct dasd_eckd_private *)device->private; + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + *uid = private->uid; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + return 0; + } + return -EINVAL; +} + static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, void *rcd_buffer, struct ciw *ciw, __u8 lpm) @@ -1088,7 +1106,9 @@ dasd_eckd_check_characteristics(struct dasd_device *device) { struct dasd_eckd_private *private; struct dasd_block *block; + struct dasd_uid temp_uid; int is_known, rc; + int readonly; if (!ccw_device_is_pathgroup(device->cdev)) { dev_warn(&device->cdev->dev, @@ -1123,13 +1143,13 @@ dasd_eckd_check_characteristics(struct dasd_device *device) if (rc) goto out_err1; - /* Generate device unique id and register in devmap */ - rc = dasd_eckd_generate_uid(device, &private->uid); + /* Generate device unique id */ + rc = dasd_eckd_generate_uid(device); if (rc) goto out_err1; - dasd_set_uid(device->cdev, &private->uid); - if (private->uid.type == UA_BASE_DEVICE) { + dasd_eckd_get_uid(device, &temp_uid); + if (temp_uid.type == UA_BASE_DEVICE) { block = dasd_alloc_block(); if (IS_ERR(block)) { DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", @@ -1182,15 +1202,20 @@ dasd_eckd_check_characteristics(struct dasd_device *device) else private->real_cyl = private->rdc_data.no_cyl; + readonly = dasd_device_is_ro(device); + if (readonly) + set_bit(DASD_FLAG_DEVICE_RO, &device->flags); + dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " - "with %d cylinders, %d heads, %d sectors\n", + "with %d cylinders, %d heads, %d sectors%s\n", private->rdc_data.dev_type, private->rdc_data.dev_model, private->rdc_data.cu_type, private->rdc_data.cu_model.model, private->real_cyl, private->rdc_data.trk_per_cyl, - private->rdc_data.sec_per_trk); + private->rdc_data.sec_per_trk, + readonly ? ", read-only device" : ""); return 0; out_err3: @@ -1445,6 +1470,7 @@ static int dasd_eckd_ready_to_online(struct dasd_device *device) static int dasd_eckd_online_to_ready(struct dasd_device *device) { + cancel_work_sync(&device->reload_device); return dasd_alias_remove_device(device); }; @@ -1703,10 +1729,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, { char mask; char *sense = NULL; + struct dasd_eckd_private *private; + private = (struct dasd_eckd_private *) device->private; /* first of all check for state change pending interrupt */ mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; if ((scsw_dstat(&irb->scsw) & mask) == mask) { + /* for alias only and not in offline processing*/ + if (!device->block && private->lcu && + !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { + /* + * the state change could be caused by an alias + * reassignment remove device from alias handling + * to prevent new requests from being scheduled on + * the wrong alias device + */ + dasd_alias_remove_device(device); + + /* schedule worker to reload device */ + dasd_reload_device(device); + } + dasd_generic_handle_state_change(device); return; } @@ -2839,8 +2882,13 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) char *psf_data, *rssd_result; struct dasd_ccw_req *cqr; struct ccw1 *ccw; + char psf0, psf1; int rc; + if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) + return -EACCES; + psf0 = psf1 = 0; + /* Copy parms from caller */ rc = -EFAULT; if (copy_from_user(&usrparm, argp, sizeof(usrparm))) @@ -2869,12 +2917,8 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) (void __user *)(unsigned long) usrparm.psf_data, usrparm.psf_data_len)) goto out_free; - - /* sanity check on syscall header */ - if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { - rc = -EINVAL; - goto out_free; - } + psf0 = psf_data[0]; + psf1 = psf_data[1]; /* setup CCWs for PSF + RSSD */ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); @@ -2925,7 +2969,9 @@ out_free: kfree(rssd_result); kfree(psf_data); out: - DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); + DBF_DEV_EVENT(DBF_WARNING, device, + "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", + (int) psf0, (int) psf1, rc); return rc; } @@ -3146,11 +3192,11 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, tsb = NULL; sense = NULL; - if (irb->scsw.tm.tcw) + if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01)) tsb = tcw_get_tsb( (struct tcw *)(unsigned long)irb->scsw.tm.tcw); - if (tsb && (irb->scsw.tm.fcxs == 0x01)) { + if (tsb) { len += sprintf(page + len, KERN_ERR PRINTK_HEADER " tsb->length %d\n", tsb->length); len += sprintf(page + len, KERN_ERR PRINTK_HEADER @@ -3250,7 +3296,7 @@ static void dasd_eckd_dump_sense(struct dasd_device *device, dasd_eckd_dump_sense_ccw(device, req, irb); } -int dasd_eckd_pm_freeze(struct dasd_device *device) +static int dasd_eckd_pm_freeze(struct dasd_device *device) { /* * the device should be disconnected from our LCU structure @@ -3263,7 +3309,7 @@ int dasd_eckd_pm_freeze(struct dasd_device *device) return 0; } -int dasd_eckd_restore_device(struct dasd_device *device) +static int dasd_eckd_restore_device(struct dasd_device *device) { struct dasd_eckd_private *private; struct dasd_eckd_characteristics temp_rdc_data; @@ -3278,15 +3324,16 @@ int dasd_eckd_restore_device(struct dasd_device *device) if (rc) goto out_err; - /* Generate device unique id and register in devmap */ - rc = dasd_eckd_generate_uid(device, &private->uid); - dasd_get_uid(device->cdev, &temp_uid); + dasd_eckd_get_uid(device, &temp_uid); + /* Generate device unique id */ + rc = dasd_eckd_generate_uid(device); + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) dev_err(&device->cdev->dev, "The UID of the DASD has " "changed\n"); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); if (rc) goto out_err; - dasd_set_uid(device->cdev, &private->uid); /* register lcu with alias handling, enable PAV if this is a new lcu */ is_known = dasd_alias_make_device_known_to_lcu(device); @@ -3327,6 +3374,56 @@ out_err: return -1; } +static int dasd_eckd_reload_device(struct dasd_device *device) +{ + struct dasd_eckd_private *private; + int rc, old_base; + char print_uid[60]; + struct dasd_uid uid; + unsigned long flags; + + private = (struct dasd_eckd_private *) device->private; + + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + old_base = private->uid.base_unit_addr; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + + /* Read Configuration Data */ + rc = dasd_eckd_read_conf(device); + if (rc) + goto out_err; + + rc = dasd_eckd_generate_uid(device); + if (rc) + goto out_err; + /* + * update unit address configuration and + * add device to alias management + */ + dasd_alias_update_add_device(device); + + dasd_eckd_get_uid(device, &uid); + + if (old_base != uid.base_unit_addr) { + if (strlen(uid.vduit) > 0) + snprintf(print_uid, sizeof(print_uid), + "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, + uid.ssid, uid.base_unit_addr, uid.vduit); + else + snprintf(print_uid, sizeof(print_uid), + "%s.%s.%04x.%02x", uid.vendor, uid.serial, + uid.ssid, uid.base_unit_addr); + + dev_info(&device->cdev->dev, + "An Alias device was reassigned to a new base device " + "with UID: %s\n", print_uid); + } + return 0; + +out_err: + return -1; +} + static struct ccw_driver dasd_eckd_driver = { .name = "dasd-eckd", .owner = THIS_MODULE, @@ -3380,6 +3477,8 @@ static struct dasd_discipline dasd_eckd_discipline = { .ioctl = dasd_eckd_ioctl, .freeze = dasd_eckd_pm_freeze, .restore = dasd_eckd_restore_device, + .reload = dasd_eckd_reload_device, + .get_uid = dasd_eckd_get_uid, }; static int __init |