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-rw-r--r--drivers/s390/block/dasd.c196
-rw-r--r--drivers/s390/block/dasd_eckd.c30
-rw-r--r--drivers/s390/block/dasd_int.h5
-rw-r--r--drivers/s390/block/dasd_ioctl.c33
4 files changed, 151 insertions, 113 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);
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 2e8e0755070b..51dea7baf02c 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2039,7 +2039,7 @@ static int dasd_eckd_online_to_ready(struct dasd_device *device)
return 0;
};
-static int dasd_eckd_ready_to_basic(struct dasd_device *device)
+static int dasd_eckd_basic_to_known(struct dasd_device *device)
{
return dasd_alias_remove_device(device);
};
@@ -2061,11 +2061,12 @@ dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
static struct dasd_ccw_req *
dasd_eckd_build_format(struct dasd_device *base,
- struct format_data_t *fdata)
+ struct format_data_t *fdata,
+ int enable_pav)
{
struct dasd_eckd_private *base_priv;
struct dasd_eckd_private *start_priv;
- struct dasd_device *startdev;
+ struct dasd_device *startdev = NULL;
struct dasd_ccw_req *fcp;
struct eckd_count *ect;
struct ch_t address;
@@ -2079,7 +2080,9 @@ dasd_eckd_build_format(struct dasd_device *base,
int nr_tracks;
int use_prefix;
- startdev = dasd_alias_get_start_dev(base);
+ if (enable_pav)
+ startdev = dasd_alias_get_start_dev(base);
+
if (!startdev)
startdev = base;
@@ -2309,6 +2312,7 @@ dasd_eckd_build_format(struct dasd_device *base,
fcp->startdev = startdev;
fcp->memdev = startdev;
+ fcp->basedev = base;
fcp->retries = 256;
fcp->expires = startdev->default_expires * HZ;
fcp->buildclk = get_tod_clock();
@@ -2319,7 +2323,8 @@ dasd_eckd_build_format(struct dasd_device *base,
static int
dasd_eckd_format_device(struct dasd_device *base,
- struct format_data_t *fdata)
+ struct format_data_t *fdata,
+ int enable_pav)
{
struct dasd_ccw_req *cqr, *n;
struct dasd_block *block;
@@ -2327,7 +2332,7 @@ dasd_eckd_format_device(struct dasd_device *base,
struct list_head format_queue;
struct dasd_device *device;
int old_stop, format_step;
- int step, rc = 0;
+ int step, rc = 0, sleep_rc;
block = base->block;
private = (struct dasd_eckd_private *) base->private;
@@ -2361,11 +2366,11 @@ dasd_eckd_format_device(struct dasd_device *base,
}
INIT_LIST_HEAD(&format_queue);
- old_stop = fdata->stop_unit;
+ old_stop = fdata->stop_unit;
while (fdata->start_unit <= 1) {
fdata->stop_unit = fdata->start_unit;
- cqr = dasd_eckd_build_format(base, fdata);
+ cqr = dasd_eckd_build_format(base, fdata, enable_pav);
list_add(&cqr->blocklist, &format_queue);
fdata->stop_unit = old_stop;
@@ -2383,7 +2388,7 @@ retry:
if (step > format_step)
fdata->stop_unit = fdata->start_unit + format_step - 1;
- cqr = dasd_eckd_build_format(base, fdata);
+ cqr = dasd_eckd_build_format(base, fdata, enable_pav);
if (IS_ERR(cqr)) {
if (PTR_ERR(cqr) == -ENOMEM) {
/*
@@ -2403,7 +2408,7 @@ retry:
}
sleep:
- dasd_sleep_on_queue(&format_queue);
+ sleep_rc = dasd_sleep_on_queue(&format_queue);
list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
device = cqr->startdev;
@@ -2415,6 +2420,9 @@ sleep:
private->count--;
}
+ if (sleep_rc)
+ return sleep_rc;
+
/*
* in case of ENOMEM we need to retry after
* first requests are finished
@@ -4511,7 +4519,7 @@ static struct dasd_discipline dasd_eckd_discipline = {
.verify_path = dasd_eckd_verify_path,
.basic_to_ready = dasd_eckd_basic_to_ready,
.online_to_ready = dasd_eckd_online_to_ready,
- .ready_to_basic = dasd_eckd_ready_to_basic,
+ .basic_to_known = dasd_eckd_basic_to_known,
.fill_geometry = dasd_eckd_fill_geometry,
.start_IO = dasd_start_IO,
.term_IO = dasd_term_IO,
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 690001af0d09..c20170166909 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -175,6 +175,7 @@ struct dasd_ccw_req {
struct dasd_block *block; /* the originating block device */
struct dasd_device *memdev; /* the device used to allocate this */
struct dasd_device *startdev; /* device the request is started on */
+ struct dasd_device *basedev; /* base device if no block->base */
void *cpaddr; /* address of ccw or tcw */
unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
char status; /* status of this request */
@@ -304,7 +305,7 @@ struct dasd_discipline {
*/
int (*basic_to_ready) (struct dasd_device *);
int (*online_to_ready) (struct dasd_device *);
- int (*ready_to_basic) (struct dasd_device *);
+ int (*basic_to_known)(struct dasd_device *);
/* (struct dasd_device *);
* Device operation functions. build_cp creates a ccw chain for
@@ -321,7 +322,7 @@ struct dasd_discipline {
int (*term_IO) (struct dasd_ccw_req *);
void (*handle_terminated_request) (struct dasd_ccw_req *);
int (*format_device) (struct dasd_device *,
- struct format_data_t *);
+ struct format_data_t *, int enable_pav);
int (*free_cp) (struct dasd_ccw_req *, struct request *);
/*
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 25a0f2f8b0b9..02837d0ad942 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -203,7 +203,9 @@ static int
dasd_format(struct dasd_block *block, struct format_data_t *fdata)
{
struct dasd_device *base;
- int rc;
+ int enable_pav = 1;
+ int rc, retries;
+ int start, stop;
base = block->base;
if (base->discipline->format_device == NULL)
@@ -231,11 +233,30 @@ dasd_format(struct dasd_block *block, struct format_data_t *fdata)
bdput(bdev);
}
- rc = base->discipline->format_device(base, fdata);
- if (rc)
- return rc;
-
- return 0;
+ retries = 255;
+ /* backup start- and endtrack for retries */
+ start = fdata->start_unit;
+ stop = fdata->stop_unit;
+ do {
+ rc = base->discipline->format_device(base, fdata, enable_pav);
+ if (rc) {
+ if (rc == -EAGAIN) {
+ retries--;
+ /* disable PAV in case of errors */
+ enable_pav = 0;
+ fdata->start_unit = start;
+ fdata->stop_unit = stop;
+ } else
+ return rc;
+ } else
+ /* success */
+ break;
+ } while (retries);
+
+ if (!retries)
+ return -EIO;
+ else
+ return 0;
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-31 17:02:37 +0100