[S390] inaccessible PAV alias devices on LPAR.
In some situations PAV alias devices on LPAR are not accessible. The initialization procedure required to enable access to PAV alias devices has to be performed per storage server subsystem and not only once per storage server. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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2f6c55fc31
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1 changed files with 18 additions and 14 deletions
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@ -48,18 +48,20 @@ struct dasd_devmap {
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};
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};
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/*
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/*
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* dasd_servermap is used to store the server_id of all storage servers
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* dasd_server_ssid_map contains a globally unique storage server subsystem ID.
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* accessed by DASD device driver.
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* dasd_server_ssid_list contains the list of all subsystem IDs accessed by
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* the DASD device driver.
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*/
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*/
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struct dasd_servermap {
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struct dasd_server_ssid_map {
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struct list_head list;
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struct list_head list;
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struct server_id {
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struct server_id {
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char vendor[4];
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char vendor[4];
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char serial[15];
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char serial[15];
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} sid;
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} sid;
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__u16 ssid;
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};
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};
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static struct list_head dasd_serverlist;
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static struct list_head dasd_server_ssid_list;
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/*
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/*
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* Parameter parsing functions for dasd= parameter. The syntax is:
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* Parameter parsing functions for dasd= parameter. The syntax is:
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@ -878,8 +880,9 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid)
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/*
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/*
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* Register the given device unique identifier into devmap struct.
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* Register the given device unique identifier into devmap struct.
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* In addition check if the related storage server is already contained in the
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* In addition check if the related storage server subsystem ID is already
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* dasd_serverlist. If server is not contained, create new entry.
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* contained in the dasd_server_ssid_list. If subsystem ID is not contained,
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* create new entry.
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* Return 0 if server was already in serverlist,
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* Return 0 if server was already in serverlist,
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* 1 if the server was added successful
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* 1 if the server was added successful
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* <0 in case of error.
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* <0 in case of error.
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@ -888,26 +891,27 @@ int
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dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
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dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
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{
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{
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struct dasd_devmap *devmap;
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struct dasd_devmap *devmap;
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struct dasd_servermap *srv, *tmp;
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struct dasd_server_ssid_map *srv, *tmp;
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devmap = dasd_find_busid(cdev->dev.bus_id);
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devmap = dasd_find_busid(cdev->dev.bus_id);
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if (IS_ERR(devmap))
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if (IS_ERR(devmap))
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return PTR_ERR(devmap);
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return PTR_ERR(devmap);
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/* generate entry for servermap */
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/* generate entry for server_ssid_map */
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srv = (struct dasd_servermap *)
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srv = (struct dasd_server_ssid_map *)
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kzalloc(sizeof(struct dasd_servermap), GFP_KERNEL);
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kzalloc(sizeof(struct dasd_server_ssid_map), GFP_KERNEL);
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if (!srv)
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if (!srv)
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return -ENOMEM;
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return -ENOMEM;
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strncpy(srv->sid.vendor, uid->vendor, sizeof(srv->sid.vendor) - 1);
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strncpy(srv->sid.vendor, uid->vendor, sizeof(srv->sid.vendor) - 1);
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strncpy(srv->sid.serial, uid->serial, sizeof(srv->sid.serial) - 1);
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strncpy(srv->sid.serial, uid->serial, sizeof(srv->sid.serial) - 1);
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srv->ssid = uid->ssid;
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/* server is already contained ? */
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/* server is already contained ? */
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spin_lock(&dasd_devmap_lock);
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spin_lock(&dasd_devmap_lock);
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devmap->uid = *uid;
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devmap->uid = *uid;
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list_for_each_entry(tmp, &dasd_serverlist, list) {
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list_for_each_entry(tmp, &dasd_server_ssid_list, list) {
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if (!memcmp(&srv->sid, &tmp->sid,
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if (!memcmp(&srv->sid, &tmp->sid,
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sizeof(struct dasd_servermap))) {
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sizeof(struct dasd_server_ssid_map))) {
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kfree(srv);
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kfree(srv);
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srv = NULL;
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srv = NULL;
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break;
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break;
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@ -916,7 +920,7 @@ dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
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/* add servermap to serverlist */
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/* add servermap to serverlist */
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if (srv)
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if (srv)
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list_add(&srv->list, &dasd_serverlist);
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list_add(&srv->list, &dasd_server_ssid_list);
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spin_unlock(&dasd_devmap_lock);
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spin_unlock(&dasd_devmap_lock);
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return (srv ? 1 : 0);
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return (srv ? 1 : 0);
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@ -987,7 +991,7 @@ dasd_devmap_init(void)
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INIT_LIST_HEAD(&dasd_hashlists[i]);
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INIT_LIST_HEAD(&dasd_hashlists[i]);
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/* Initialize servermap structure. */
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/* Initialize servermap structure. */
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INIT_LIST_HEAD(&dasd_serverlist);
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INIT_LIST_HEAD(&dasd_server_ssid_list);
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return 0;
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return 0;
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}
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}
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