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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/s390/block
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/s390/block')
-rw-r--r--kernel/drivers/s390/block/dasd.c55
-rw-r--r--kernel/drivers/s390/block/dasd_alias.c37
-rw-r--r--kernel/drivers/s390/block/dasd_diag.c9
-rw-r--r--kernel/drivers/s390/block/dasd_eckd.c380
-rw-r--r--kernel/drivers/s390/block/dasd_eckd.h11
-rw-r--r--kernel/drivers/s390/block/dasd_genhd.c19
-rw-r--r--kernel/drivers/s390/block/dasd_int.h1
-rw-r--r--kernel/drivers/s390/block/dcssblk.c36
-rw-r--r--kernel/drivers/s390/block/xpram.c10
9 files changed, 414 insertions, 144 deletions
diff --git a/kernel/drivers/s390/block/dasd.c b/kernel/drivers/s390/block/dasd.c
index 57fd66357..4abfbdb28 100644
--- a/kernel/drivers/s390/block/dasd.c
+++ b/kernel/drivers/s390/block/dasd.c
@@ -38,6 +38,8 @@
*/
#define DASD_CHANQ_MAX_SIZE 4
+#define DASD_DIAG_MOD "dasd_diag_mod"
+
/*
* SECTION: exported variables of dasd.c
*/
@@ -1861,6 +1863,33 @@ static void __dasd_device_check_expire(struct dasd_device *device)
}
/*
+ * return 1 when device is not eligible for IO
+ */
+static int __dasd_device_is_unusable(struct dasd_device *device,
+ struct dasd_ccw_req *cqr)
+{
+ int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM);
+
+ if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
+ /* dasd is being set offline. */
+ return 1;
+ }
+ if (device->stopped) {
+ if (device->stopped & mask) {
+ /* stopped and CQR will not change that. */
+ return 1;
+ }
+ if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
+ /* CQR is not able to change device to
+ * operational. */
+ return 1;
+ }
+ /* CQR required to get device operational. */
+ }
+ return 0;
+}
+
+/*
* Take a look at the first request on the ccw queue and check
* if it needs to be started.
*/
@@ -1874,13 +1903,8 @@ static void __dasd_device_start_head(struct dasd_device *device)
cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
if (cqr->status != DASD_CQR_QUEUED)
return;
- /* when device is stopped, return request to previous layer
- * exception: only the disconnect or unresumed bits are set and the
- * cqr is a path verification request
- */
- if (device->stopped &&
- !(!(device->stopped & ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
- && test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))) {
+ /* if device is not usable return request to upper layer */
+ if (__dasd_device_is_unusable(device, cqr)) {
cqr->intrc = -EAGAIN;
cqr->status = DASD_CQR_CLEARED;
dasd_schedule_device_bh(device);
@@ -3006,6 +3030,8 @@ static void dasd_setup_queue(struct dasd_block *block)
} else {
max = block->base->discipline->max_blocks << block->s2b_shift;
}
+ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, block->request_queue);
+ block->request_queue->limits.max_dev_sectors = max;
blk_queue_logical_block_size(block->request_queue,
block->bp_block);
blk_queue_max_hw_sectors(block->request_queue, max);
@@ -3300,6 +3326,21 @@ int dasd_generic_set_online(struct ccw_device *cdev,
discipline = base_discipline;
if (device->features & DASD_FEATURE_USEDIAG) {
if (!dasd_diag_discipline_pointer) {
+ /* Try to load the required module. */
+ rc = request_module(DASD_DIAG_MOD);
+ if (rc) {
+ pr_warn("%s Setting the DASD online failed "
+ "because the required module %s "
+ "could not be loaded (rc=%d)\n",
+ dev_name(&cdev->dev), DASD_DIAG_MOD,
+ rc);
+ dasd_delete_device(device);
+ return -ENODEV;
+ }
+ }
+ /* Module init could have failed, so check again here after
+ * request_module(). */
+ if (!dasd_diag_discipline_pointer) {
pr_warn("%s Setting the DASD online failed because of missing DIAG discipline\n",
dev_name(&cdev->dev));
dasd_delete_device(device);
diff --git a/kernel/drivers/s390/block/dasd_alias.c b/kernel/drivers/s390/block/dasd_alias.c
index a2597e683..286782c60 100644
--- a/kernel/drivers/s390/block/dasd_alias.c
+++ b/kernel/drivers/s390/block/dasd_alias.c
@@ -58,7 +58,7 @@ static struct alias_server *_find_server(struct dasd_uid *uid)
&& !strncmp(pos->uid.serial, uid->serial,
sizeof(uid->serial)))
return pos;
- };
+ }
return NULL;
}
@@ -69,7 +69,7 @@ static struct alias_lcu *_find_lcu(struct alias_server *server,
list_for_each_entry(pos, &server->lculist, lcu) {
if (pos->uid.ssid == uid->ssid)
return pos;
- };
+ }
return NULL;
}
@@ -97,7 +97,7 @@ static struct alias_pav_group *_find_group(struct alias_lcu *lcu,
if (pos->uid.base_unit_addr == search_unit_addr &&
!strncmp(pos->uid.vduit, uid->vduit, sizeof(uid->vduit)))
return pos;
- };
+ }
return NULL;
}
@@ -264,8 +264,10 @@ void dasd_alias_disconnect_device_from_lcu(struct dasd_device *device)
spin_unlock_irqrestore(&lcu->lock, flags);
cancel_work_sync(&lcu->suc_data.worker);
spin_lock_irqsave(&lcu->lock, flags);
- if (device == lcu->suc_data.device)
+ if (device == lcu->suc_data.device) {
+ dasd_put_device(device);
lcu->suc_data.device = NULL;
+ }
}
was_pending = 0;
if (device == lcu->ruac_data.device) {
@@ -273,8 +275,10 @@ void dasd_alias_disconnect_device_from_lcu(struct dasd_device *device)
was_pending = 1;
cancel_delayed_work_sync(&lcu->ruac_data.dwork);
spin_lock_irqsave(&lcu->lock, flags);
- if (device == lcu->ruac_data.device)
+ if (device == lcu->ruac_data.device) {
+ dasd_put_device(device);
lcu->ruac_data.device = NULL;
+ }
}
private->lcu = NULL;
spin_unlock_irqrestore(&lcu->lock, flags);
@@ -549,8 +553,10 @@ static void lcu_update_work(struct work_struct *work)
if ((rc && (rc != -EOPNOTSUPP)) || (lcu->flags & NEED_UAC_UPDATE)) {
DBF_DEV_EVENT(DBF_WARNING, device, "could not update"
" alias data in lcu (rc = %d), retry later", rc);
- schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ);
+ if (!schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ))
+ dasd_put_device(device);
} else {
+ dasd_put_device(device);
lcu->ruac_data.device = NULL;
lcu->flags &= ~UPDATE_PENDING;
}
@@ -593,8 +599,10 @@ static int _schedule_lcu_update(struct alias_lcu *lcu,
*/
if (!usedev)
return -EINVAL;
+ dasd_get_device(usedev);
lcu->ruac_data.device = usedev;
- schedule_delayed_work(&lcu->ruac_data.dwork, 0);
+ if (!schedule_delayed_work(&lcu->ruac_data.dwork, 0))
+ dasd_put_device(usedev);
return 0;
}
@@ -699,7 +707,8 @@ struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device)
struct dasd_device, alias_list);
spin_unlock_irqrestore(&lcu->lock, flags);
alias_priv = (struct dasd_eckd_private *) alias_device->private;
- if ((alias_priv->count < private->count) && !alias_device->stopped)
+ if ((alias_priv->count < private->count) && !alias_device->stopped &&
+ !test_bit(DASD_FLAG_OFFLINE, &alias_device->flags))
return alias_device;
else
return NULL;
@@ -722,7 +731,7 @@ static int reset_summary_unit_check(struct alias_lcu *lcu,
ASCEBC((char *) &cqr->magic, 4);
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_RSCK;
- ccw->flags = 0 ;
+ ccw->flags = CCW_FLAG_SLI;
ccw->count = 16;
ccw->cda = (__u32)(addr_t) cqr->data;
((char *)cqr->data)[0] = reason;
@@ -823,8 +832,11 @@ static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)
* were waiting for the flush
*/
if (device == list_first_entry(&active,
- struct dasd_device, alias_list))
+ struct dasd_device, alias_list)) {
list_move(&device->alias_list, &lcu->active_devices);
+ private = (struct dasd_eckd_private *) device->private;
+ private->pavgroup = NULL;
+ }
}
spin_unlock_irqrestore(&lcu->lock, flags);
}
@@ -926,6 +938,7 @@ static void summary_unit_check_handling_work(struct work_struct *work)
/* 3. read new alias configuration */
_schedule_lcu_update(lcu, device);
lcu->suc_data.device = NULL;
+ dasd_put_device(device);
spin_unlock_irqrestore(&lcu->lock, flags);
}
@@ -985,6 +998,8 @@ void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
}
lcu->suc_data.reason = reason;
lcu->suc_data.device = device;
+ dasd_get_device(device);
spin_unlock(&lcu->lock);
- schedule_work(&lcu->suc_data.worker);
+ if (!schedule_work(&lcu->suc_data.worker))
+ dasd_put_device(device);
};
diff --git a/kernel/drivers/s390/block/dasd_diag.c b/kernel/drivers/s390/block/dasd_diag.c
index c062f1620..277b5c8c8 100644
--- a/kernel/drivers/s390/block/dasd_diag.c
+++ b/kernel/drivers/s390/block/dasd_diag.c
@@ -21,6 +21,7 @@
#include <asm/dasd.h>
#include <asm/debug.h>
+#include <asm/diag.h>
#include <asm/ebcdic.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -66,7 +67,7 @@ static const u8 DASD_DIAG_CMS1[] = { 0xc3, 0xd4, 0xe2, 0xf1 };/* EBCDIC CMS1 */
* and function code cmd.
* In case of an exception return 3. Otherwise return result of bitwise OR of
* resulting condition code and DIAG return code. */
-static inline int dia250(void *iob, int cmd)
+static inline int __dia250(void *iob, int cmd)
{
register unsigned long reg2 asm ("2") = (unsigned long) iob;
typedef union {
@@ -89,6 +90,12 @@ static inline int dia250(void *iob, int cmd)
return rc;
}
+static inline int dia250(void *iob, int cmd)
+{
+ diag_stat_inc(DIAG_STAT_X250);
+ return __dia250(iob, cmd);
+}
+
/* Initialize block I/O to DIAG device using the specified blocksize and
* block offset. On success, return zero and set end_block to contain the
* number of blocks on the device minus the specified offset. Return non-zero
diff --git a/kernel/drivers/s390/block/dasd_eckd.c b/kernel/drivers/s390/block/dasd_eckd.c
index 6215f6455..9083247f5 100644
--- a/kernel/drivers/s390/block/dasd_eckd.c
+++ b/kernel/drivers/s390/block/dasd_eckd.c
@@ -1032,11 +1032,26 @@ static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
return 0;
}
+static void dasd_eckd_clear_conf_data(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private;
+ int i;
+
+ private = (struct dasd_eckd_private *) device->private;
+ private->conf_data = NULL;
+ private->conf_len = 0;
+ for (i = 0; i < 8; i++) {
+ kfree(private->path_conf_data[i]);
+ private->path_conf_data[i] = NULL;
+ }
+}
+
+
static int dasd_eckd_read_conf(struct dasd_device *device)
{
void *conf_data;
int conf_len, conf_data_saved;
- int rc, path_err;
+ int rc, path_err, pos;
__u8 lpm, opm;
struct dasd_eckd_private *private, path_private;
struct dasd_path *path_data;
@@ -1070,7 +1085,8 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
}
/* save first valid configuration data */
if (!conf_data_saved) {
- kfree(private->conf_data);
+ /* initially clear previously stored conf_data */
+ dasd_eckd_clear_conf_data(device);
private->conf_data = conf_data;
private->conf_len = conf_len;
if (dasd_eckd_identify_conf_parts(private)) {
@@ -1079,6 +1095,10 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
kfree(conf_data);
continue;
}
+ pos = pathmask_to_pos(lpm);
+ /* store per path conf_data */
+ private->path_conf_data[pos] =
+ (struct dasd_conf_data *) conf_data;
/*
* build device UID that other path data
* can be compared to it
@@ -1095,7 +1115,6 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
kfree(conf_data);
continue;
}
-
if (dasd_eckd_compare_path_uid(
device, &path_private)) {
uid = &path_private.uid;
@@ -1137,7 +1156,10 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
path_data->cablepm |= lpm;
continue;
}
-
+ pos = pathmask_to_pos(lpm);
+ /* store per path conf_data */
+ private->path_conf_data[pos] =
+ (struct dasd_conf_data *) conf_data;
path_private.conf_data = NULL;
path_private.conf_len = 0;
}
@@ -1149,7 +1171,12 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
path_data->ppm |= lpm;
break;
}
- path_data->opm |= lpm;
+ if (!path_data->opm) {
+ path_data->opm = lpm;
+ dasd_generic_path_operational(device);
+ } else {
+ path_data->opm |= lpm;
+ }
/*
* if the path is used
* it should not be in one of the negative lists
@@ -1157,9 +1184,6 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
path_data->cablepm &= ~lpm;
path_data->hpfpm &= ~lpm;
path_data->cuirpm &= ~lpm;
-
- if (conf_data != private->conf_data)
- kfree(conf_data);
}
return path_err;
@@ -1259,7 +1283,11 @@ static void do_path_verification_work(struct work_struct *work)
schedule_work(work);
return;
}
-
+ /* check if path verification already running and delay if so */
+ if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
+ schedule_work(work);
+ return;
+ }
opm = 0;
npm = 0;
ppm = 0;
@@ -1402,7 +1430,7 @@ static void do_path_verification_work(struct work_struct *work)
device->path_data.hpfpm |= hpfpm;
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
}
-
+ clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
dasd_put_device(device);
if (data->isglobal)
mutex_unlock(&dasd_path_verification_mutex);
@@ -1810,6 +1838,7 @@ out_err1:
static void dasd_eckd_uncheck_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
+ int i;
private = (struct dasd_eckd_private *) device->private;
dasd_alias_disconnect_device_from_lcu(device);
@@ -1818,6 +1847,15 @@ static void dasd_eckd_uncheck_device(struct dasd_device *device)
private->vdsneq = NULL;
private->gneq = NULL;
private->conf_len = 0;
+ for (i = 0; i < 8; i++) {
+ kfree(private->path_conf_data[i]);
+ if ((__u8 *)private->path_conf_data[i] ==
+ private->conf_data) {
+ private->conf_data = NULL;
+ private->conf_len = 0;
+ }
+ private->path_conf_data[i] = NULL;
+ }
kfree(private->conf_data);
private->conf_data = NULL;
}
@@ -3968,7 +4006,7 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
rc = -EFAULT;
if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
goto out;
- if (is_compat_task() || sizeof(long) == 4) {
+ if (is_compat_task()) {
/* Make sure pointers are sane even on 31 bit. */
rc = -EINVAL;
if ((usrparm.psf_data >> 32) != 0)
@@ -4402,7 +4440,12 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
private = (struct dasd_eckd_private *) device->private;
/* Read Configuration Data */
- dasd_eckd_read_conf(device);
+ rc = dasd_eckd_read_conf(device);
+ if (rc) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
+ "Read configuration data failed, rc=%d", rc);
+ goto out_err;
+ }
dasd_eckd_get_uid(device, &temp_uid);
/* Generate device unique id */
@@ -4418,13 +4461,18 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
/* register lcu with alias handling, enable PAV if this is a new lcu */
rc = dasd_alias_make_device_known_to_lcu(device);
if (rc)
- return rc;
+ goto out_err;
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
dasd_eckd_validate_server(device, cqr_flags);
/* RE-Read Configuration Data */
- dasd_eckd_read_conf(device);
+ rc = dasd_eckd_read_conf(device);
+ if (rc) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
+ "Read configuration data failed, rc=%d", rc);
+ goto out_err2;
+ }
/* Read Feature Codes */
dasd_eckd_read_features(device);
@@ -4435,7 +4483,7 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
if (rc) {
DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
"Read device characteristic failed, rc=%d", rc);
- goto out_err;
+ goto out_err2;
}
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
@@ -4446,6 +4494,8 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
return 0;
+out_err2:
+ dasd_alias_disconnect_device_from_lcu(device);
out_err:
return -1;
}
@@ -4525,12 +4575,13 @@ static int dasd_eckd_read_message_buffer(struct dasd_device *device,
cqr->startdev = device;
cqr->memdev = device;
cqr->block = NULL;
- cqr->retries = 256;
cqr->expires = 10 * HZ;
-
- /* we need to check for messages on exactly this path */
set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
- cqr->lpm = lpum;
+ /* dasd_sleep_on_immediatly does not do complex error
+ * recovery so clear erp flag and set retry counter to
+ * do basic erp */
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ cqr->retries = 256;
/* Prepare for Read Subsystem Data */
prssdp = (struct dasd_psf_prssd_data *) cqr->data;
@@ -4605,10 +4656,10 @@ dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
psf_cuir->message_id = message_id;
psf_cuir->cssid = sch_id.cssid;
psf_cuir->ssid = sch_id.ssid;
-
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_PSF;
ccw->cda = (__u32)(addr_t)psf_cuir;
+ ccw->flags = CCW_FLAG_SLI;
ccw->count = sizeof(struct dasd_psf_cuir_response);
cqr->startdev = device;
@@ -4618,6 +4669,7 @@ dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
cqr->expires = 10*HZ;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
+ set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
rc = dasd_sleep_on(cqr);
@@ -4625,118 +4677,252 @@ dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
return rc;
}
-static int dasd_eckd_cuir_change_state(struct dasd_device *device, __u8 lpum)
+/*
+ * return configuration data that is referenced by record selector
+ * if a record selector is specified or per default return the
+ * conf_data pointer for the path specified by lpum
+ */
+static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
+ __u8 lpum,
+ struct dasd_cuir_message *cuir)
{
- unsigned long flags;
- __u8 tbcpm;
+ struct dasd_eckd_private *private;
+ struct dasd_conf_data *conf_data;
+ int path, pos;
- spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
- tbcpm = device->path_data.opm & ~lpum;
- if (tbcpm) {
- device->path_data.opm = tbcpm;
- device->path_data.cuirpm |= lpum;
+ private = (struct dasd_eckd_private *) device->private;
+ if (cuir->record_selector == 0)
+ goto out;
+ for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
+ conf_data = private->path_conf_data[pos];
+ if (conf_data->gneq.record_selector ==
+ cuir->record_selector)
+ return conf_data;
}
- spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
- return tbcpm ? 0 : PSF_CUIR_LAST_PATH;
+out:
+ return private->path_conf_data[pathmask_to_pos(lpum)];
}
/*
- * walk through all devices and quiesce them
- * if it is the last path return error
+ * This function determines the scope of a reconfiguration request by
+ * analysing the path and device selection data provided in the CUIR request.
+ * Returns a path mask containing CUIR affected paths for the give device.
+ *
+ * If the CUIR request does not contain the required information return the
+ * path mask of the path the attention message for the CUIR request was reveived
+ * on.
+ */
+static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
+ struct dasd_cuir_message *cuir)
+{
+ struct dasd_conf_data *ref_conf_data;
+ unsigned long bitmask = 0, mask = 0;
+ struct dasd_eckd_private *private;
+ struct dasd_conf_data *conf_data;
+ unsigned int pos, path;
+ char *ref_gneq, *gneq;
+ char *ref_ned, *ned;
+ int tbcpm = 0;
+
+ /* if CUIR request does not specify the scope use the path
+ the attention message was presented on */
+ if (!cuir->ned_map ||
+ !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
+ return lpum;
+
+ private = (struct dasd_eckd_private *) device->private;
+ /* get reference conf data */
+ ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
+ /* reference ned is determined by ned_map field */
+ pos = 8 - ffs(cuir->ned_map);
+ ref_ned = (char *)&ref_conf_data->neds[pos];
+ ref_gneq = (char *)&ref_conf_data->gneq;
+ /* transfer 24 bit neq_map to mask */
+ mask = cuir->neq_map[2];
+ mask |= cuir->neq_map[1] << 8;
+ mask |= cuir->neq_map[0] << 16;
+
+ for (path = 0x80; path; path >>= 1) {
+ /* initialise data per path */
+ bitmask = mask;
+ pos = pathmask_to_pos(path);
+ conf_data = private->path_conf_data[pos];
+ pos = 8 - ffs(cuir->ned_map);
+ ned = (char *) &conf_data->neds[pos];
+ /* compare reference ned and per path ned */
+ if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
+ continue;
+ gneq = (char *)&conf_data->gneq;
+ /* compare reference gneq and per_path gneq under
+ 24 bit mask where mask bit 0 equals byte 7 of
+ the gneq and mask bit 24 equals byte 31 */
+ while (bitmask) {
+ pos = ffs(bitmask) - 1;
+ if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
+ != 0)
+ break;
+ clear_bit(pos, &bitmask);
+ }
+ if (bitmask)
+ continue;
+ /* device and path match the reference values
+ add path to CUIR scope */
+ tbcpm |= path;
+ }
+ return tbcpm;
+}
+
+static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
+ unsigned long paths,
+ struct subchannel_id sch_id, int action)
+{
+ struct channel_path_desc *desc;
+ int pos;
+
+ while (paths) {
+ /* get position of bit in mask */
+ pos = ffs(paths) - 1;
+ /* get channel path descriptor from this position */
+ desc = ccw_device_get_chp_desc(device->cdev, 7 - pos);
+ if (action == CUIR_QUIESCE)
+ pr_warn("Service on the storage server caused path "
+ "%x.%02x to go offline", sch_id.cssid,
+ desc ? desc->chpid : 0);
+ else if (action == CUIR_RESUME)
+ pr_info("Path %x.%02x is back online after service "
+ "on the storage server", sch_id.cssid,
+ desc ? desc->chpid : 0);
+ kfree(desc);
+ clear_bit(pos, &paths);
+ }
+}
+
+static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
+ struct dasd_cuir_message *cuir)
+{
+ unsigned long tbcpm;
+
+ tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
+ /* nothing to do if path is not in use */
+ if (!(device->path_data.opm & tbcpm))
+ return 0;
+ if (!(device->path_data.opm & ~tbcpm)) {
+ /* no path would be left if the CUIR action is taken
+ return error */
+ return -EINVAL;
+ }
+ /* remove device from operational path mask */
+ device->path_data.opm &= ~tbcpm;
+ device->path_data.cuirpm |= tbcpm;
+ return tbcpm;
+}
+
+/*
+ * walk through all devices and build a path mask to quiesce them
+ * return an error if the last path to a device would be removed
*
* if only part of the devices are quiesced and an error
* occurs no onlining necessary, the storage server will
* notify the already set offline devices again
*/
static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
- struct channel_path_desc *desc,
- struct subchannel_id sch_id)
+ struct subchannel_id sch_id,
+ struct dasd_cuir_message *cuir)
{
struct alias_pav_group *pavgroup, *tempgroup;
struct dasd_eckd_private *private;
struct dasd_device *dev, *n;
- int rc;
+ unsigned long paths = 0;
+ unsigned long flags;
+ int tbcpm;
private = (struct dasd_eckd_private *) device->private;
- rc = 0;
-
/* active devices */
- list_for_each_entry_safe(dev, n,
- &private->lcu->active_devices,
+ list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
alias_list) {
- rc = dasd_eckd_cuir_change_state(dev, lpum);
- if (rc)
- goto out;
+ spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
+ tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
+ spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
+ if (tbcpm < 0)
+ goto out_err;
+ paths |= tbcpm;
}
-
/* inactive devices */
- list_for_each_entry_safe(dev, n,
- &private->lcu->inactive_devices,
+ list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
alias_list) {
- rc = dasd_eckd_cuir_change_state(dev, lpum);
- if (rc)
- goto out;
+ spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
+ tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
+ spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
+ if (tbcpm < 0)
+ goto out_err;
+ paths |= tbcpm;
}
-
/* devices in PAV groups */
list_for_each_entry_safe(pavgroup, tempgroup,
&private->lcu->grouplist, group) {
list_for_each_entry_safe(dev, n, &pavgroup->baselist,
alias_list) {
- rc = dasd_eckd_cuir_change_state(dev, lpum);
- if (rc)
- goto out;
+ spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
+ tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(dev->cdev), flags);
+ if (tbcpm < 0)
+ goto out_err;
+ paths |= tbcpm;
}
list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
alias_list) {
- rc = dasd_eckd_cuir_change_state(dev, lpum);
- if (rc)
- goto out;
+ spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
+ tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(dev->cdev), flags);
+ if (tbcpm < 0)
+ goto out_err;
+ paths |= tbcpm;
}
}
-
- pr_warn("Service on the storage server caused path %x.%02x to go offline",
- sch_id.cssid, desc ? desc->chpid : 0);
- rc = PSF_CUIR_COMPLETED;
-out:
- return rc;
+ /* notify user about all paths affected by CUIR action */
+ dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE);
+ return 0;
+out_err:
+ return tbcpm;
}
static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
- struct channel_path_desc *desc,
- struct subchannel_id sch_id)
+ struct subchannel_id sch_id,
+ struct dasd_cuir_message *cuir)
{
struct alias_pav_group *pavgroup, *tempgroup;
struct dasd_eckd_private *private;
struct dasd_device *dev, *n;
+ unsigned long paths = 0;
+ int tbcpm;
- pr_info("Path %x.%02x is back online after service on the storage server",
- sch_id.cssid, desc ? desc->chpid : 0);
private = (struct dasd_eckd_private *) device->private;
-
/*
* the path may have been added through a generic path event before
* only trigger path verification if the path is not already in use
*/
-
list_for_each_entry_safe(dev, n,
&private->lcu->active_devices,
alias_list) {
- if (!(dev->path_data.opm & lpum)) {
- dev->path_data.tbvpm |= lpum;
+ tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
+ paths |= tbcpm;
+ if (!(dev->path_data.opm & tbcpm)) {
+ dev->path_data.tbvpm |= tbcpm;
dasd_schedule_device_bh(dev);
}
}
-
list_for_each_entry_safe(dev, n,
&private->lcu->inactive_devices,
alias_list) {
- if (!(dev->path_data.opm & lpum)) {
- dev->path_data.tbvpm |= lpum;
+ tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
+ paths |= tbcpm;
+ if (!(dev->path_data.opm & tbcpm)) {
+ dev->path_data.tbvpm |= tbcpm;
dasd_schedule_device_bh(dev);
}
}
-
/* devices in PAV groups */
list_for_each_entry_safe(pavgroup, tempgroup,
&private->lcu->grouplist,
@@ -4744,21 +4930,27 @@ static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
list_for_each_entry_safe(dev, n,
&pavgroup->baselist,
alias_list) {
- if (!(dev->path_data.opm & lpum)) {
- dev->path_data.tbvpm |= lpum;
+ tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
+ paths |= tbcpm;
+ if (!(dev->path_data.opm & tbcpm)) {
+ dev->path_data.tbvpm |= tbcpm;
dasd_schedule_device_bh(dev);
}
}
list_for_each_entry_safe(dev, n,
&pavgroup->aliaslist,
alias_list) {
- if (!(dev->path_data.opm & lpum)) {
- dev->path_data.tbvpm |= lpum;
+ tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
+ paths |= tbcpm;
+ if (!(dev->path_data.opm & tbcpm)) {
+ dev->path_data.tbvpm |= tbcpm;
dasd_schedule_device_bh(dev);
}
}
}
- return PSF_CUIR_COMPLETED;
+ /* notify user about all paths affected by CUIR action */
+ dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME);
+ return 0;
}
static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
@@ -4768,27 +4960,37 @@ static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
struct channel_path_desc *desc;
struct subchannel_id sch_id;
int pos, response;
- ccw_device_get_schid(device->cdev, &sch_id);
- /* get position of path in mask */
- pos = 8 - ffs(lpum);
- /* get channel path descriptor from this position */
+ DBF_DEV_EVENT(DBF_WARNING, device,
+ "CUIR request: %016llx %016llx %016llx %08x",
+ ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
+ ((u32 *)cuir)[3]);
+ ccw_device_get_schid(device->cdev, &sch_id);
+ pos = pathmask_to_pos(lpum);
desc = ccw_device_get_chp_desc(device->cdev, pos);
if (cuir->code == CUIR_QUIESCE) {
/* quiesce */
- response = dasd_eckd_cuir_quiesce(device, lpum, desc, sch_id);
+ if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir))
+ response = PSF_CUIR_LAST_PATH;
+ else
+ response = PSF_CUIR_COMPLETED;
} else if (cuir->code == CUIR_RESUME) {
/* resume */
- response = dasd_eckd_cuir_resume(device, lpum, desc, sch_id);
+ dasd_eckd_cuir_resume(device, lpum, sch_id, cuir);
+ response = PSF_CUIR_COMPLETED;
} else
response = PSF_CUIR_NOT_SUPPORTED;
- dasd_eckd_psf_cuir_response(device, response, cuir->message_id,
- desc, sch_id);
-
+ dasd_eckd_psf_cuir_response(device, response,
+ cuir->message_id, desc, sch_id);
+ DBF_DEV_EVENT(DBF_WARNING, device,
+ "CUIR response: %d on message ID %08x", response,
+ cuir->message_id);
/* free descriptor copy */
kfree(desc);
+ /* to make sure there is no attention left schedule work again */
+ device->discipline->check_attention(device, lpum);
}
static void dasd_eckd_check_attention_work(struct work_struct *work)
@@ -4800,22 +5002,18 @@ static void dasd_eckd_check_attention_work(struct work_struct *work)
data = container_of(work, struct check_attention_work_data, worker);
device = data->device;
-
messages = kzalloc(sizeof(*messages), GFP_KERNEL);
if (!messages) {
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"Could not allocate attention message buffer");
goto out;
}
-
rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
if (rc)
goto out;
-
if (messages->length == ATTENTION_LENGTH_CUIR &&
messages->format == ATTENTION_FORMAT_CUIR)
dasd_eckd_handle_cuir(device, messages, data->lpum);
-
out:
dasd_put_device(device);
kfree(messages);
diff --git a/kernel/drivers/s390/block/dasd_eckd.h b/kernel/drivers/s390/block/dasd_eckd.h
index ddab7df36..f8f91ee65 100644
--- a/kernel/drivers/s390/block/dasd_eckd.h
+++ b/kernel/drivers/s390/block/dasd_eckd.h
@@ -355,7 +355,8 @@ struct dasd_gneq {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
- __u8 reserved[5];
+ __u8 record_selector;
+ __u8 reserved[4];
struct {
__u8 value:2;
__u8 number:6;
@@ -492,10 +493,18 @@ struct alias_pav_group {
struct dasd_device *next;
};
+struct dasd_conf_data {
+ struct dasd_ned neds[5];
+ u8 reserved[64];
+ struct dasd_gneq gneq;
+} __packed;
+
struct dasd_eckd_private {
struct dasd_eckd_characteristics rdc_data;
u8 *conf_data;
int conf_len;
+ /* per path configuration data */
+ struct dasd_conf_data *path_conf_data[8];
/* pointers to specific parts in the conf_data */
struct dasd_ned *ned;
struct dasd_sneq *sneq;
diff --git a/kernel/drivers/s390/block/dasd_genhd.c b/kernel/drivers/s390/block/dasd_genhd.c
index 90f39f79f..ef1d9fb06 100644
--- a/kernel/drivers/s390/block/dasd_genhd.c
+++ b/kernel/drivers/s390/block/dasd_genhd.c
@@ -99,9 +99,8 @@ void dasd_gendisk_free(struct dasd_block *block)
int dasd_scan_partitions(struct dasd_block *block)
{
struct block_device *bdev;
- int retry, rc;
+ int rc;
- retry = 5;
bdev = bdget_disk(block->gdp, 0);
if (!bdev) {
DBF_DEV_EVENT(DBF_ERR, block->base, "%s",
@@ -116,19 +115,11 @@ int dasd_scan_partitions(struct dasd_block *block)
rc);
return -ENODEV;
}
- /*
- * See fs/partition/check.c:register_disk,rescan_partitions
- * Can't call rescan_partitions directly. Use ioctl.
- */
- rc = ioctl_by_bdev(bdev, BLKRRPART, 0);
- while (rc == -EBUSY && retry > 0) {
- schedule();
- rc = ioctl_by_bdev(bdev, BLKRRPART, 0);
- retry--;
+
+ rc = blkdev_reread_part(bdev);
+ if (rc)
DBF_DEV_EVENT(DBF_ERR, block->base,
- "scan partitions error, retry %d rc %d",
- retry, rc);
- }
+ "scan partitions error, rc %d", rc);
/*
* Since the matching blkdev_put call to the blkdev_get in
diff --git a/kernel/drivers/s390/block/dasd_int.h b/kernel/drivers/s390/block/dasd_int.h
index 227e3dea3..4aed5ed70 100644
--- a/kernel/drivers/s390/block/dasd_int.h
+++ b/kernel/drivers/s390/block/dasd_int.h
@@ -534,6 +534,7 @@ struct dasd_attention_data {
#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
+#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
#define DASD_SLEEPON_START_TAG ((void *) 1)
#define DASD_SLEEPON_END_TAG ((void *) 2)
diff --git a/kernel/drivers/s390/block/dcssblk.c b/kernel/drivers/s390/block/dcssblk.c
index da212813f..94a8f4ab5 100644
--- a/kernel/drivers/s390/block/dcssblk.c
+++ b/kernel/drivers/s390/block/dcssblk.c
@@ -27,9 +27,10 @@
static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static void dcssblk_release(struct gendisk *disk, fmode_t mode);
-static void dcssblk_make_request(struct request_queue *q, struct bio *bio);
+static blk_qc_t dcssblk_make_request(struct request_queue *q,
+ struct bio *bio);
static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
- void **kaddr, unsigned long *pfn, long size);
+ void __pmem **kaddr, unsigned long *pfn);
static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
@@ -548,10 +549,10 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
*/
num_of_segments = 0;
for (i = 0; (i < count && (buf[i] != '\0') && (buf[i] != '\n')); i++) {
- for (j = i; (buf[j] != ':') &&
+ for (j = i; j < count &&
+ (buf[j] != ':') &&
(buf[j] != '\0') &&
- (buf[j] != '\n') &&
- j < count; j++) {
+ (buf[j] != '\n'); j++) {
local_buf[j-i] = toupper(buf[j]);
}
local_buf[j-i] = '\0';
@@ -723,7 +724,7 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
/*
* parse input
*/
- for (i = 0; ((*(buf+i)!='\0') && (*(buf+i)!='\n') && i < count); i++) {
+ for (i = 0; (i < count && (*(buf+i)!='\0') && (*(buf+i)!='\n')); i++) {
local_buf[i] = toupper(buf[i]);
}
local_buf[i] = '\0';
@@ -815,7 +816,7 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
up_write(&dcssblk_devices_sem);
}
-static void
+static blk_qc_t
dcssblk_make_request(struct request_queue *q, struct bio *bio)
{
struct dcssblk_dev_info *dev_info;
@@ -826,6 +827,8 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
unsigned long source_addr;
unsigned long bytes_done;
+ blk_queue_split(q, &bio, q->bio_split);
+
bytes_done = 0;
dev_info = bio->bi_bdev->bd_disk->private_data;
if (dev_info == NULL)
@@ -871,26 +874,29 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
}
bytes_done += bvec.bv_len;
}
- bio_endio(bio, 0);
- return;
+ bio_endio(bio);
+ return BLK_QC_T_NONE;
fail:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static long
dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
- void **kaddr, unsigned long *pfn, long size)
+ void __pmem **kaddr, unsigned long *pfn)
{
struct dcssblk_dev_info *dev_info;
unsigned long offset, dev_sz;
+ void *addr;
dev_info = bdev->bd_disk->private_data;
if (!dev_info)
return -ENODEV;
dev_sz = dev_info->end - dev_info->start;
offset = secnum * 512;
- *kaddr = (void *) (dev_info->start + offset);
- *pfn = virt_to_phys(*kaddr) >> PAGE_SHIFT;
+ addr = (void *) (dev_info->start + offset);
+ *pfn = virt_to_phys(addr) >> PAGE_SHIFT;
+ *kaddr = (void __pmem *) addr;
return dev_sz - offset;
}
@@ -904,10 +910,10 @@ dcssblk_check_params(void)
for (i = 0; (i < DCSSBLK_PARM_LEN) && (dcssblk_segments[i] != '\0');
i++) {
- for (j = i; (dcssblk_segments[j] != ',') &&
+ for (j = i; (j < DCSSBLK_PARM_LEN) &&
+ (dcssblk_segments[j] != ',') &&
(dcssblk_segments[j] != '\0') &&
- (dcssblk_segments[j] != '(') &&
- (j < DCSSBLK_PARM_LEN); j++)
+ (dcssblk_segments[j] != '('); j++)
{
buf[j-i] = dcssblk_segments[j];
}
diff --git a/kernel/drivers/s390/block/xpram.c b/kernel/drivers/s390/block/xpram.c
index 7d4e9397a..288f59a41 100644
--- a/kernel/drivers/s390/block/xpram.c
+++ b/kernel/drivers/s390/block/xpram.c
@@ -181,7 +181,7 @@ static unsigned long xpram_highest_page_index(void)
/*
* Block device make request function.
*/
-static void xpram_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t xpram_make_request(struct request_queue *q, struct bio *bio)
{
xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
struct bio_vec bvec;
@@ -190,6 +190,8 @@ static void xpram_make_request(struct request_queue *q, struct bio *bio)
unsigned long page_addr;
unsigned long bytes;
+ blk_queue_split(q, &bio, q->bio_split);
+
if ((bio->bi_iter.bi_sector & 7) != 0 ||
(bio->bi_iter.bi_size & 4095) != 0)
/* Request is not page-aligned. */
@@ -220,11 +222,11 @@ static void xpram_make_request(struct request_queue *q, struct bio *bio)
index++;
}
}
- set_bit(BIO_UPTODATE, &bio->bi_flags);
- bio_endio(bio, 0);
- return;
+ bio_endio(bio);
+ return BLK_QC_T_NONE;
fail:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static int xpram_getgeo(struct block_device *bdev, struct hd_geometry *geo)