diff options
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 196 |
1 files changed, 102 insertions, 94 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 1eef0f586950..5df05f26b7d9 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -42,8 +42,10 @@ * SECTION: exported variables of dasd.c */ debug_info_t *dasd_debug_area; +EXPORT_SYMBOL(dasd_debug_area); static struct dentry *dasd_debugfs_root_entry; struct dasd_discipline *dasd_diag_discipline_pointer; +EXPORT_SYMBOL(dasd_diag_discipline_pointer); void dasd_int_handler(struct ccw_device *, unsigned long, struct irb *); MODULE_AUTHOR("Holger Smolinski <Holger.Smolinski@de.ibm.com>"); @@ -164,6 +166,7 @@ struct dasd_block *dasd_alloc_block(void) return block; } +EXPORT_SYMBOL_GPL(dasd_alloc_block); /* * Free memory of a device structure. @@ -172,6 +175,7 @@ void dasd_free_block(struct dasd_block *block) { kfree(block); } +EXPORT_SYMBOL_GPL(dasd_free_block); /* * Make a new device known to the system. @@ -281,10 +285,15 @@ static int dasd_state_basic_to_known(struct dasd_device *device) { int rc; + if (device->discipline->basic_to_known) { + rc = device->discipline->basic_to_known(device); + if (rc) + return rc; + } + if (device->block) { dasd_profile_exit(&device->block->profile); - if (device->block->debugfs_dentry) - debugfs_remove(device->block->debugfs_dentry); + debugfs_remove(device->block->debugfs_dentry); dasd_gendisk_free(device->block); dasd_block_clear_timer(device->block); } @@ -293,9 +302,7 @@ static int dasd_state_basic_to_known(struct dasd_device *device) return rc; dasd_device_clear_timer(device); dasd_profile_exit(&device->profile); - if (device->debugfs_dentry) - debugfs_remove(device->debugfs_dentry); - + debugfs_remove(device->debugfs_dentry); DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device); if (device->debug_area != NULL) { debug_unregister(device->debug_area); @@ -374,11 +381,6 @@ static int dasd_state_ready_to_basic(struct dasd_device *device) { int rc; - if (device->discipline->ready_to_basic) { - rc = device->discipline->ready_to_basic(device); - if (rc) - return rc; - } device->state = DASD_STATE_BASIC; if (device->block) { struct dasd_block *block = device->block; @@ -579,6 +581,7 @@ void dasd_kick_device(struct dasd_device *device) /* queue call to dasd_kick_device to the kernel event daemon. */ schedule_work(&device->kick_work); } +EXPORT_SYMBOL(dasd_kick_device); /* * dasd_reload_device will schedule a call do do_reload_device to the kernel @@ -639,6 +642,7 @@ void dasd_set_target_state(struct dasd_device *device, int target) mutex_unlock(&device->state_mutex); dasd_put_device(device); } +EXPORT_SYMBOL(dasd_set_target_state); /* * Enable devices with device numbers in [from..to]. @@ -661,6 +665,7 @@ void dasd_enable_device(struct dasd_device *device) if (device->discipline->kick_validate) device->discipline->kick_validate(device); } +EXPORT_SYMBOL(dasd_enable_device); /* * SECTION: device operation (interrupt handler, start i/o, term i/o ...) @@ -972,37 +977,37 @@ static void dasd_stats_seq_print(struct seq_file *m, seq_printf(m, "total_sectors %u\n", data->dasd_io_sects); seq_printf(m, "total_pav %u\n", data->dasd_io_alias); seq_printf(m, "total_hpf %u\n", data->dasd_io_tpm); - seq_printf(m, "histogram_sectors "); + seq_puts(m, "histogram_sectors "); dasd_stats_array(m, data->dasd_io_secs); - seq_printf(m, "histogram_io_times "); + seq_puts(m, "histogram_io_times "); dasd_stats_array(m, data->dasd_io_times); - seq_printf(m, "histogram_io_times_weighted "); + seq_puts(m, "histogram_io_times_weighted "); dasd_stats_array(m, data->dasd_io_timps); - seq_printf(m, "histogram_time_build_to_ssch "); + seq_puts(m, "histogram_time_build_to_ssch "); dasd_stats_array(m, data->dasd_io_time1); - seq_printf(m, "histogram_time_ssch_to_irq "); + seq_puts(m, "histogram_time_ssch_to_irq "); dasd_stats_array(m, data->dasd_io_time2); - seq_printf(m, "histogram_time_ssch_to_irq_weighted "); + seq_puts(m, "histogram_time_ssch_to_irq_weighted "); dasd_stats_array(m, data->dasd_io_time2ps); - seq_printf(m, "histogram_time_irq_to_end "); + seq_puts(m, "histogram_time_irq_to_end "); dasd_stats_array(m, data->dasd_io_time3); - seq_printf(m, "histogram_ccw_queue_length "); + seq_puts(m, "histogram_ccw_queue_length "); dasd_stats_array(m, data->dasd_io_nr_req); seq_printf(m, "total_read_requests %u\n", data->dasd_read_reqs); seq_printf(m, "total_read_sectors %u\n", data->dasd_read_sects); seq_printf(m, "total_read_pav %u\n", data->dasd_read_alias); seq_printf(m, "total_read_hpf %u\n", data->dasd_read_tpm); - seq_printf(m, "histogram_read_sectors "); + seq_puts(m, "histogram_read_sectors "); dasd_stats_array(m, data->dasd_read_secs); - seq_printf(m, "histogram_read_times "); + seq_puts(m, "histogram_read_times "); dasd_stats_array(m, data->dasd_read_times); - seq_printf(m, "histogram_read_time_build_to_ssch "); + seq_puts(m, "histogram_read_time_build_to_ssch "); dasd_stats_array(m, data->dasd_read_time1); - seq_printf(m, "histogram_read_time_ssch_to_irq "); + seq_puts(m, "histogram_read_time_ssch_to_irq "); dasd_stats_array(m, data->dasd_read_time2); - seq_printf(m, "histogram_read_time_irq_to_end "); + seq_puts(m, "histogram_read_time_irq_to_end "); dasd_stats_array(m, data->dasd_read_time3); - seq_printf(m, "histogram_read_ccw_queue_length "); + seq_puts(m, "histogram_read_ccw_queue_length "); dasd_stats_array(m, data->dasd_read_nr_req); } @@ -1016,7 +1021,7 @@ static int dasd_stats_show(struct seq_file *m, void *v) data = profile->data; if (!data) { spin_unlock_bh(&profile->lock); - seq_printf(m, "disabled\n"); + seq_puts(m, "disabled\n"); return 0; } dasd_stats_seq_print(m, data); @@ -1069,7 +1074,7 @@ static ssize_t dasd_stats_global_write(struct file *file, static int dasd_stats_global_show(struct seq_file *m, void *v) { if (!dasd_global_profile_level) { - seq_printf(m, "disabled\n"); + seq_puts(m, "disabled\n"); return 0; } dasd_stats_seq_print(m, &dasd_global_profile_data); @@ -1111,23 +1116,17 @@ static void dasd_profile_init(struct dasd_profile *profile, static void dasd_profile_exit(struct dasd_profile *profile) { dasd_profile_off(profile); - if (profile->dentry) { - debugfs_remove(profile->dentry); - profile->dentry = NULL; - } + debugfs_remove(profile->dentry); + profile->dentry = NULL; } static void dasd_statistics_removeroot(void) { dasd_global_profile_level = DASD_PROFILE_OFF; - if (dasd_global_profile_dentry) { - debugfs_remove(dasd_global_profile_dentry); - dasd_global_profile_dentry = NULL; - } - if (dasd_debugfs_global_entry) - debugfs_remove(dasd_debugfs_global_entry); - if (dasd_debugfs_root_entry) - debugfs_remove(dasd_debugfs_root_entry); + debugfs_remove(dasd_global_profile_dentry); + dasd_global_profile_dentry = NULL; + debugfs_remove(dasd_debugfs_global_entry); + debugfs_remove(dasd_debugfs_root_entry); } static void dasd_statistics_createroot(void) @@ -1178,7 +1177,7 @@ static void dasd_statistics_removeroot(void) int dasd_stats_generic_show(struct seq_file *m, void *v) { - seq_printf(m, "Statistics are not activated in this kernel\n"); + seq_puts(m, "Statistics are not activated in this kernel\n"); return 0; } @@ -1243,6 +1242,7 @@ struct dasd_ccw_req *dasd_kmalloc_request(int magic, int cplength, dasd_get_device(device); return cqr; } +EXPORT_SYMBOL(dasd_kmalloc_request); struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength, int datasize, @@ -1282,6 +1282,7 @@ struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength, dasd_get_device(device); return cqr; } +EXPORT_SYMBOL(dasd_smalloc_request); /* * Free memory of a channel program. This function needs to free all the @@ -1304,6 +1305,7 @@ void dasd_kfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) kfree(cqr); dasd_put_device(device); } +EXPORT_SYMBOL(dasd_kfree_request); void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) { @@ -1314,6 +1316,7 @@ void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) spin_unlock_irqrestore(&device->mem_lock, flags); dasd_put_device(device); } +EXPORT_SYMBOL(dasd_sfree_request); /* * Check discipline magic in cqr. @@ -1391,6 +1394,7 @@ int dasd_term_IO(struct dasd_ccw_req *cqr) dasd_schedule_device_bh(device); return rc; } +EXPORT_SYMBOL(dasd_term_IO); /* * Start the i/o. This start_IO can fail if the channel is really busy. @@ -1509,6 +1513,7 @@ int dasd_start_IO(struct dasd_ccw_req *cqr) cqr->intrc = rc; return rc; } +EXPORT_SYMBOL(dasd_start_IO); /* * Timeout function for dasd devices. This is used for different purposes @@ -1541,6 +1546,7 @@ void dasd_device_set_timer(struct dasd_device *device, int expires) else mod_timer(&device->timer, jiffies + expires); } +EXPORT_SYMBOL(dasd_device_set_timer); /* * Clear timeout for a device. @@ -1549,6 +1555,7 @@ void dasd_device_clear_timer(struct dasd_device *device) { del_timer(&device->timer); } +EXPORT_SYMBOL(dasd_device_clear_timer); static void dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm) @@ -1601,6 +1608,7 @@ void dasd_generic_handle_state_change(struct dasd_device *device) if (device->block) dasd_schedule_block_bh(device->block); } +EXPORT_SYMBOL_GPL(dasd_generic_handle_state_change); /* * Interrupt handler for "normal" ssch-io based dasd devices. @@ -1667,8 +1675,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, if (cqr->status == DASD_CQR_CLEAR_PENDING && scsw_fctl(&irb->scsw) & SCSW_FCTL_CLEAR_FUNC) { cqr->status = DASD_CQR_CLEARED; + if (cqr->callback_data == DASD_SLEEPON_START_TAG) + cqr->callback_data = DASD_SLEEPON_END_TAG; dasd_device_clear_timer(device); wake_up(&dasd_flush_wq); + wake_up(&generic_waitq); dasd_schedule_device_bh(device); return; } @@ -1722,6 +1733,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, dasd_device_clear_timer(device); dasd_schedule_device_bh(device); } +EXPORT_SYMBOL(dasd_int_handler); enum uc_todo dasd_generic_uc_handler(struct ccw_device *cdev, struct irb *irb) { @@ -1995,6 +2007,7 @@ finished: __dasd_device_process_final_queue(device, &flush_queue); return rc; } +EXPORT_SYMBOL_GPL(dasd_flush_device_queue); /* * Acquire the device lock and process queues for the device. @@ -2034,6 +2047,7 @@ void dasd_schedule_device_bh(struct dasd_device *device) dasd_get_device(device); tasklet_hi_schedule(&device->tasklet); } +EXPORT_SYMBOL(dasd_schedule_device_bh); void dasd_device_set_stop_bits(struct dasd_device *device, int bits) { @@ -2066,6 +2080,7 @@ void dasd_add_request_head(struct dasd_ccw_req *cqr) dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); } +EXPORT_SYMBOL(dasd_add_request_head); /* * Queue a request to the tail of the device ccw_queue. @@ -2084,6 +2099,7 @@ void dasd_add_request_tail(struct dasd_ccw_req *cqr) dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); } +EXPORT_SYMBOL(dasd_add_request_tail); /* * Wakeup helper for the 'sleep_on' functions. @@ -2291,13 +2307,27 @@ retry: rc = 0; list_for_each_entry_safe(cqr, n, ccw_queue, blocklist) { - if (__dasd_sleep_on_erp(cqr)) - rc = 1; + /* + * for alias devices simplify error recovery and + * return to upper layer + */ + if (cqr->startdev != cqr->basedev && + (cqr->status == DASD_CQR_TERMINATED || + cqr->status == DASD_CQR_NEED_ERP)) + return -EAGAIN; + else { + /* normal recovery for basedev IO */ + if (__dasd_sleep_on_erp(cqr)) { + if (!cqr->status == DASD_CQR_TERMINATED && + !cqr->status == DASD_CQR_NEED_ERP) + break; + rc = 1; + } + } } if (rc) goto retry; - return 0; } @@ -2309,6 +2339,7 @@ int dasd_sleep_on(struct dasd_ccw_req *cqr) { return _dasd_sleep_on(cqr, 0); } +EXPORT_SYMBOL(dasd_sleep_on); /* * Start requests from a ccw_queue and wait for their completion. @@ -2327,6 +2358,7 @@ int dasd_sleep_on_interruptible(struct dasd_ccw_req *cqr) { return _dasd_sleep_on(cqr, 1); } +EXPORT_SYMBOL(dasd_sleep_on_interruptible); /* * Whoa nelly now it gets really hairy. For some functions (e.g. steal lock @@ -2401,6 +2433,7 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr) return rc; } +EXPORT_SYMBOL(dasd_sleep_on_immediatly); /* * Cancels a request that was started with dasd_sleep_on_req. @@ -2423,6 +2456,8 @@ int dasd_cancel_req(struct dasd_ccw_req *cqr) case DASD_CQR_QUEUED: /* request was not started - just set to cleared */ cqr->status = DASD_CQR_CLEARED; + if (cqr->callback_data == DASD_SLEEPON_START_TAG) + cqr->callback_data = DASD_SLEEPON_END_TAG; break; case DASD_CQR_IN_IO: /* request in IO - terminate IO and release again */ @@ -2442,6 +2477,7 @@ int dasd_cancel_req(struct dasd_ccw_req *cqr) dasd_schedule_device_bh(device); return rc; } +EXPORT_SYMBOL(dasd_cancel_req); /* * SECTION: Operations of the dasd_block layer. @@ -2475,6 +2511,7 @@ void dasd_block_set_timer(struct dasd_block *block, int expires) else mod_timer(&block->timer, jiffies + expires); } +EXPORT_SYMBOL(dasd_block_set_timer); /* * Clear timeout for a dasd_block. @@ -2483,6 +2520,7 @@ void dasd_block_clear_timer(struct dasd_block *block) { del_timer(&block->timer); } +EXPORT_SYMBOL(dasd_block_clear_timer); /* * Process finished error recovery ccw. @@ -2864,6 +2902,7 @@ void dasd_schedule_block_bh(struct dasd_block *block) dasd_get_device(block->base); tasklet_hi_schedule(&block->tasklet); } +EXPORT_SYMBOL(dasd_schedule_block_bh); /* @@ -3202,8 +3241,8 @@ static void dasd_generic_auto_online(void *data, async_cookie_t cookie) ret = ccw_device_set_online(cdev); if (ret) - pr_warning("%s: Setting the DASD online failed with rc=%d\n", - dev_name(&cdev->dev), ret); + pr_warn("%s: Setting the DASD online failed with rc=%d\n", + dev_name(&cdev->dev), ret); } /* @@ -3234,6 +3273,7 @@ int dasd_generic_probe(struct ccw_device *cdev, async_schedule(dasd_generic_auto_online, cdev); return 0; } +EXPORT_SYMBOL_GPL(dasd_generic_probe); /* * This will one day be called from a global not_oper handler. @@ -3276,6 +3316,7 @@ void dasd_generic_remove(struct ccw_device *cdev) dasd_remove_sysfs_files(cdev); } +EXPORT_SYMBOL_GPL(dasd_generic_remove); /* * Activate a device. This is called from dasd_{eckd,fba}_probe() when either @@ -3298,9 +3339,8 @@ int dasd_generic_set_online(struct ccw_device *cdev, discipline = base_discipline; if (device->features & DASD_FEATURE_USEDIAG) { if (!dasd_diag_discipline_pointer) { - pr_warning("%s Setting the DASD online failed because " - "of missing DIAG discipline\n", - dev_name(&cdev->dev)); + pr_warn("%s Setting the DASD online failed because of missing DIAG discipline\n", + dev_name(&cdev->dev)); dasd_delete_device(device); return -ENODEV; } @@ -3321,9 +3361,8 @@ int dasd_generic_set_online(struct ccw_device *cdev, /* check_device will allocate block device if necessary */ rc = discipline->check_device(device); if (rc) { - pr_warning("%s Setting the DASD online with discipline %s " - "failed with rc=%i\n", - dev_name(&cdev->dev), discipline->name, rc); + pr_warn("%s Setting the DASD online with discipline %s failed with rc=%i\n", + dev_name(&cdev->dev), discipline->name, rc); module_put(discipline->owner); module_put(base_discipline->owner); dasd_delete_device(device); @@ -3332,8 +3371,8 @@ int dasd_generic_set_online(struct ccw_device *cdev, dasd_set_target_state(device, DASD_STATE_ONLINE); if (device->state <= DASD_STATE_KNOWN) { - pr_warning("%s Setting the DASD online failed because of a " - "missing discipline\n", dev_name(&cdev->dev)); + pr_warn("%s Setting the DASD online failed because of a missing discipline\n", + dev_name(&cdev->dev)); rc = -ENODEV; dasd_set_target_state(device, DASD_STATE_NEW); if (device->block) @@ -3348,6 +3387,7 @@ int dasd_generic_set_online(struct ccw_device *cdev, dasd_put_device(device); return rc; } +EXPORT_SYMBOL_GPL(dasd_generic_set_online); int dasd_generic_set_offline(struct ccw_device *cdev) { @@ -3371,13 +3411,11 @@ int dasd_generic_set_offline(struct ccw_device *cdev) open_count = atomic_read(&device->block->open_count); if (open_count > max_count) { if (open_count > 0) - pr_warning("%s: The DASD cannot be set offline " - "with open count %i\n", - dev_name(&cdev->dev), open_count); + pr_warn("%s: The DASD cannot be set offline with open count %i\n", + dev_name(&cdev->dev), open_count); else - pr_warning("%s: The DASD cannot be set offline " - "while it is in use\n", - dev_name(&cdev->dev)); + pr_warn("%s: The DASD cannot be set offline while it is in use\n", + dev_name(&cdev->dev)); clear_bit(DASD_FLAG_OFFLINE, &device->flags); dasd_put_device(device); return -EBUSY; @@ -3451,6 +3489,7 @@ interrupted: dasd_put_device(device); return rc; } +EXPORT_SYMBOL_GPL(dasd_generic_set_offline); int dasd_generic_last_path_gone(struct dasd_device *device) { @@ -3492,6 +3531,10 @@ int dasd_generic_path_operational(struct dasd_device *device) dasd_schedule_device_bh(device); if (device->block) dasd_schedule_block_bh(device->block); + + if (!device->stopped) + wake_up(&generic_waitq); + return 1; } EXPORT_SYMBOL_GPL(dasd_generic_path_operational); @@ -3523,6 +3566,7 @@ int dasd_generic_notify(struct ccw_device *cdev, int event) dasd_put_device(device); return ret; } +EXPORT_SYMBOL_GPL(dasd_generic_notify); void dasd_generic_path_event(struct ccw_device *cdev, int *path_event) { @@ -3872,39 +3916,3 @@ failed: module_init(dasd_init); module_exit(dasd_exit); - -EXPORT_SYMBOL(dasd_debug_area); -EXPORT_SYMBOL(dasd_diag_discipline_pointer); - -EXPORT_SYMBOL(dasd_add_request_head); -EXPORT_SYMBOL(dasd_add_request_tail); -EXPORT_SYMBOL(dasd_cancel_req); -EXPORT_SYMBOL(dasd_device_clear_timer); -EXPORT_SYMBOL(dasd_block_clear_timer); -EXPORT_SYMBOL(dasd_enable_device); -EXPORT_SYMBOL(dasd_int_handler); -EXPORT_SYMBOL(dasd_kfree_request); -EXPORT_SYMBOL(dasd_kick_device); -EXPORT_SYMBOL(dasd_kmalloc_request); -EXPORT_SYMBOL(dasd_schedule_device_bh); -EXPORT_SYMBOL(dasd_schedule_block_bh); -EXPORT_SYMBOL(dasd_set_target_state); -EXPORT_SYMBOL(dasd_device_set_timer); -EXPORT_SYMBOL(dasd_block_set_timer); -EXPORT_SYMBOL(dasd_sfree_request); -EXPORT_SYMBOL(dasd_sleep_on); -EXPORT_SYMBOL(dasd_sleep_on_immediatly); -EXPORT_SYMBOL(dasd_sleep_on_interruptible); -EXPORT_SYMBOL(dasd_smalloc_request); -EXPORT_SYMBOL(dasd_start_IO); -EXPORT_SYMBOL(dasd_term_IO); - -EXPORT_SYMBOL_GPL(dasd_generic_probe); -EXPORT_SYMBOL_GPL(dasd_generic_remove); -EXPORT_SYMBOL_GPL(dasd_generic_notify); -EXPORT_SYMBOL_GPL(dasd_generic_set_online); -EXPORT_SYMBOL_GPL(dasd_generic_set_offline); -EXPORT_SYMBOL_GPL(dasd_generic_handle_state_change); -EXPORT_SYMBOL_GPL(dasd_flush_device_queue); -EXPORT_SYMBOL_GPL(dasd_alloc_block); -EXPORT_SYMBOL_GPL(dasd_free_block); |