diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd.c | 6 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_alias.c | 64 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 63 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 2 |
4 files changed, 46 insertions, 89 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index eef27a197c00..110137e7ec81 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -3261,6 +3261,12 @@ void dasd_generic_path_event(struct ccw_device *cdev, int *path_event) device->path_data.tbvpm |= eventlpm; dasd_schedule_device_bh(device); } + if (path_event[chp] & PE_PATHGROUP_ESTABLISHED) { + DBF_DEV_EVENT(DBF_WARNING, device, "%s", + "Pathgroup re-established\n"); + if (device->discipline->kick_validate) + device->discipline->kick_validate(device); + } } dasd_put_device(device); } diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index 553b3c5abb0a..b3beed5434e4 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -189,14 +189,12 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device) unsigned long flags; struct alias_server *server, *newserver; struct alias_lcu *lcu, *newlcu; - int is_lcu_known; struct dasd_uid uid; private = (struct dasd_eckd_private *) device->private; device->discipline->get_uid(device, &uid); spin_lock_irqsave(&aliastree.lock, flags); - is_lcu_known = 1; server = _find_server(&uid); if (!server) { spin_unlock_irqrestore(&aliastree.lock, flags); @@ -208,7 +206,6 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device) if (!server) { list_add(&newserver->server, &aliastree.serverlist); server = newserver; - is_lcu_known = 0; } else { /* someone was faster */ _free_server(newserver); @@ -226,12 +223,10 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device) if (!lcu) { list_add(&newlcu->lcu, &server->lculist); lcu = newlcu; - is_lcu_known = 0; } else { /* someone was faster */ _free_lcu(newlcu); } - is_lcu_known = 0; } spin_lock(&lcu->lock); list_add(&device->alias_list, &lcu->inactive_devices); @@ -239,64 +234,7 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device) spin_unlock(&lcu->lock); spin_unlock_irqrestore(&aliastree.lock, flags); - return is_lcu_known; -} - -/* - * The first device to be registered on an LCU will have to do - * some additional setup steps to configure that LCU on the - * storage server. All further devices should wait with their - * initialization until the first device is done. - * To synchronize this work, the first device will call - * dasd_alias_lcu_setup_complete when it is done, and all - * other devices will wait for it with dasd_alias_wait_for_lcu_setup. - */ -void dasd_alias_lcu_setup_complete(struct dasd_device *device) -{ - unsigned long flags; - struct alias_server *server; - struct alias_lcu *lcu; - struct dasd_uid uid; - - device->discipline->get_uid(device, &uid); - lcu = NULL; - spin_lock_irqsave(&aliastree.lock, flags); - server = _find_server(&uid); - if (server) - lcu = _find_lcu(server, &uid); - spin_unlock_irqrestore(&aliastree.lock, flags); - if (!lcu) { - DBF_EVENT_DEVID(DBF_ERR, device->cdev, - "could not find lcu for %04x %02x", - uid.ssid, uid.real_unit_addr); - WARN_ON(1); - return; - } - complete_all(&lcu->lcu_setup); -} - -void dasd_alias_wait_for_lcu_setup(struct dasd_device *device) -{ - unsigned long flags; - struct alias_server *server; - struct alias_lcu *lcu; - struct dasd_uid uid; - - device->discipline->get_uid(device, &uid); - lcu = NULL; - spin_lock_irqsave(&aliastree.lock, flags); - server = _find_server(&uid); - if (server) - lcu = _find_lcu(server, &uid); - spin_unlock_irqrestore(&aliastree.lock, flags); - if (!lcu) { - DBF_EVENT_DEVID(DBF_ERR, device->cdev, - "could not find lcu for %04x %02x", - uid.ssid, uid.real_unit_addr); - WARN_ON(1); - return; - } - wait_for_completion(&lcu->lcu_setup); + return 0; } /* diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index bbcd5e9206ee..70880be26015 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -1534,6 +1534,10 @@ static void dasd_eckd_validate_server(struct dasd_device *device) struct dasd_eckd_private *private; int enable_pav; + private = (struct dasd_eckd_private *) device->private; + if (private->uid.type == UA_BASE_PAV_ALIAS || + private->uid.type == UA_HYPER_PAV_ALIAS) + return; if (dasd_nopav || MACHINE_IS_VM) enable_pav = 0; else @@ -1542,11 +1546,28 @@ static void dasd_eckd_validate_server(struct dasd_device *device) /* may be requested feature is not available on server, * therefore just report error and go ahead */ - private = (struct dasd_eckd_private *) device->private; DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " "returned rc=%d", private->uid.ssid, rc); } +/* + * worker to do a validate server in case of a lost pathgroup + */ +static void dasd_eckd_do_validate_server(struct work_struct *work) +{ + struct dasd_device *device = container_of(work, struct dasd_device, + kick_validate); + dasd_eckd_validate_server(device); + dasd_put_device(device); +} + +static void dasd_eckd_kick_validate_server(struct dasd_device *device) +{ + dasd_get_device(device); + /* queue call to do_validate_server to the kernel event daemon. */ + schedule_work(&device->kick_validate); +} + static u32 get_fcx_max_data(struct dasd_device *device) { #if defined(CONFIG_64BIT) @@ -1588,10 +1609,13 @@ 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, i; + int rc, i; int readonly; unsigned long value; + /* setup work queue for validate server*/ + INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); + if (!ccw_device_is_pathgroup(device->cdev)) { dev_warn(&device->cdev->dev, "A channel path group could not be established\n"); @@ -1651,22 +1675,12 @@ dasd_eckd_check_characteristics(struct dasd_device *device) block->base = device; } - /* register lcu with alias handling, enable PAV if this is a new lcu */ - is_known = dasd_alias_make_device_known_to_lcu(device); - if (is_known < 0) { - rc = is_known; + /* register lcu with alias handling, enable PAV */ + rc = dasd_alias_make_device_known_to_lcu(device); + if (rc) goto out_err2; - } - /* - * dasd_eckd_validate_server is done on the first device that - * is found for an LCU. All later other devices have to wait - * for it, so they will read the correct feature codes. - */ - if (!is_known) { - dasd_eckd_validate_server(device); - dasd_alias_lcu_setup_complete(device); - } else - dasd_alias_wait_for_lcu_setup(device); + + dasd_eckd_validate_server(device); /* device may report different configuration data after LCU setup */ rc = dasd_eckd_read_conf(device); @@ -4098,7 +4112,7 @@ static int dasd_eckd_restore_device(struct dasd_device *device) { struct dasd_eckd_private *private; struct dasd_eckd_characteristics temp_rdc_data; - int is_known, rc; + int rc; struct dasd_uid temp_uid; unsigned long flags; @@ -4121,14 +4135,10 @@ static int dasd_eckd_restore_device(struct dasd_device *device) goto out_err; /* register lcu with alias handling, enable PAV if this is a new lcu */ - is_known = dasd_alias_make_device_known_to_lcu(device); - if (is_known < 0) - return is_known; - if (!is_known) { - dasd_eckd_validate_server(device); - dasd_alias_lcu_setup_complete(device); - } else - dasd_alias_wait_for_lcu_setup(device); + rc = dasd_alias_make_device_known_to_lcu(device); + if (rc) + return rc; + dasd_eckd_validate_server(device); /* RE-Read Configuration Data */ rc = dasd_eckd_read_conf(device); @@ -4270,6 +4280,7 @@ static struct dasd_discipline dasd_eckd_discipline = { .restore = dasd_eckd_restore_device, .reload = dasd_eckd_reload_device, .get_uid = dasd_eckd_get_uid, + .kick_validate = dasd_eckd_kick_validate_server, }; static int __init diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index afe8c33422ed..33a6743ddc55 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -355,6 +355,7 @@ struct dasd_discipline { int (*reload) (struct dasd_device *); int (*get_uid) (struct dasd_device *, struct dasd_uid *); + void (*kick_validate) (struct dasd_device *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; @@ -455,6 +456,7 @@ struct dasd_device { struct work_struct kick_work; struct work_struct restore_device; struct work_struct reload_device; + struct work_struct kick_validate; struct timer_list timer; debug_info_t *debug_area; |