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s390/dasd: summarize dasd configuration data in a separate structure

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Summarize the dasd configuration data in a separate structure so that
functions that need temporary config data do not need to allocate the
whole eckd_private structure.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20211020115124.1735254-6-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Stefan Haberland 2021-10-20 13:51:22 +02:00 committed by Jens Axboe
parent 74e2f21102
commit 542e30ce8e
2 changed files with 98 additions and 97 deletions
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182
drivers/s390/block/dasd_eckd.c
View File

@ -560,8 +560,8 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
return -EINVAL;
}
pfxdata->format = format;
pfxdata->base_address = basepriv->ned->unit_addr;
pfxdata->base_lss = basepriv->ned->ID;
pfxdata->base_address = basepriv->conf.ned->unit_addr;
pfxdata->base_lss = basepriv->conf.ned->ID;
pfxdata->validity.define_extent = 1;
/* private uid is kept up to date, conf_data may be outdated */
@ -736,32 +736,30 @@ dasd_eckd_cdl_reclen(int recid)
return LABEL_SIZE;
}
/* create unique id from private structure. */
static void create_uid(struct dasd_eckd_private *private)
static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid)
{
int count;
struct dasd_uid *uid;
uid = &private->uid;
memset(uid, 0, sizeof(struct dasd_uid));
memcpy(uid->vendor, private->ned->HDA_manufacturer,
memcpy(uid->vendor, conf->ned->HDA_manufacturer,
sizeof(uid->vendor) - 1);
EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
memcpy(uid->serial, &private->ned->serial,
memcpy(uid->serial, &conf->ned->serial,
sizeof(uid->serial) - 1);
EBCASC(uid->serial, sizeof(uid->serial) - 1);
uid->ssid = private->gneq->subsystemID;
uid->real_unit_addr = private->ned->unit_addr;
if (private->sneq) {
uid->type = private->sneq->sua_flags;
uid->ssid = conf->gneq->subsystemID;
uid->real_unit_addr = conf->ned->unit_addr;
if (conf->sneq) {
uid->type = conf->sneq->sua_flags;
if (uid->type == UA_BASE_PAV_ALIAS)
uid->base_unit_addr = private->sneq->base_unit_addr;
uid->base_unit_addr = conf->sneq->base_unit_addr;
} else {
uid->type = UA_BASE_DEVICE;
}
if (private->vdsneq) {
if (conf->vdsneq) {
for (count = 0; count < 16; count++) {
sprintf(uid->vduit+2*count, "%02x",
private->vdsneq->uit[count]);
conf->vdsneq->uit[count]);
}
}
}
@ -776,10 +774,10 @@ static int dasd_eckd_generate_uid(struct dasd_device *device)
if (!private)
return -ENODEV;
if (!private->ned || !private->gneq)
if (!private->conf.ned || !private->conf.gneq)
return -ENODEV;
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
create_uid(private);
create_uid(&private->conf, &private->uid);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
return 0;
}
@ -803,14 +801,15 @@ static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
* return 0 for match
*/
static int dasd_eckd_compare_path_uid(struct dasd_device *device,
struct dasd_eckd_private *private)
struct dasd_conf *path_conf)
{
struct dasd_uid device_uid;
struct dasd_uid path_uid;
create_uid(private);
create_uid(path_conf, &path_uid);
dasd_eckd_get_uid(device, &device_uid);
return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid));
}
static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
@ -946,34 +945,34 @@ out_error:
return ret;
}
static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf)
{
struct dasd_sneq *sneq;
int i, count;
private->ned = NULL;
private->sneq = NULL;
private->vdsneq = NULL;
private->gneq = NULL;
count = private->conf_len / sizeof(struct dasd_sneq);
sneq = (struct dasd_sneq *)private->conf_data;
conf->ned = NULL;
conf->sneq = NULL;
conf->vdsneq = NULL;
conf->gneq = NULL;
count = conf->len / sizeof(struct dasd_sneq);
sneq = (struct dasd_sneq *)conf->data;
for (i = 0; i < count; ++i) {
if (sneq->flags.identifier == 1 && sneq->format == 1)
private->sneq = sneq;
conf->sneq = sneq;
else if (sneq->flags.identifier == 1 && sneq->format == 4)
private->vdsneq = (struct vd_sneq *)sneq;
conf->vdsneq = (struct vd_sneq *)sneq;
else if (sneq->flags.identifier == 2)
private->gneq = (struct dasd_gneq *)sneq;
conf->gneq = (struct dasd_gneq *)sneq;
else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
private->ned = (struct dasd_ned *)sneq;
conf->ned = (struct dasd_ned *)sneq;
sneq++;
}
if (!private->ned || !private->gneq) {
private->ned = NULL;
private->sneq = NULL;
private->vdsneq = NULL;
private->gneq = NULL;
if (!conf->ned || !conf->gneq) {
conf->ned = NULL;
conf->sneq = NULL;
conf->vdsneq = NULL;
conf->gneq = NULL;
return -EINVAL;
}
return 0;
@ -1016,9 +1015,9 @@ static void dasd_eckd_store_conf_data(struct dasd_device *device,
* with the new one if this points to the same data
*/
cdp = device->path[chp].conf_data;
if (private->conf_data == cdp) {
private->conf_data = (void *)conf_data;
dasd_eckd_identify_conf_parts(private);
if (private->conf.data == cdp) {
private->conf.data = (void *)conf_data;
dasd_eckd_identify_conf_parts(&private->conf);
}
ccw_device_get_schid(device->cdev, &sch_id);
device->path[chp].conf_data = conf_data;
@ -1036,8 +1035,8 @@ static void dasd_eckd_clear_conf_data(struct dasd_device *device)
struct dasd_eckd_private *private = device->private;
int i;
private->conf_data = NULL;
private->conf_len = 0;
private->conf.data = NULL;
private->conf.len = 0;
for (i = 0; i < 8; i++) {
kfree(device->path[i].conf_data);
device->path[i].conf_data = NULL;
@ -1071,22 +1070,22 @@ static void dasd_eckd_read_fc_security(struct dasd_device *device)
}
}
static void dasd_eckd_get_uid_string(struct dasd_eckd_private *private,
static void dasd_eckd_get_uid_string(struct dasd_conf *conf,
char *print_uid)
{
struct dasd_uid *uid;
struct dasd_uid uid;
uid = &private->uid;
if (strlen(uid->vduit) > 0)
create_uid(conf, &uid);
if (strlen(uid.vduit) > 0)
snprintf(print_uid, sizeof(*print_uid),
"%s.%s.%04x.%02x.%s",
uid->vendor, uid->serial, uid->ssid,
uid->real_unit_addr, uid->vduit);
uid.vendor, uid.serial, uid.ssid,
uid.real_unit_addr, uid.vduit);
else
snprintf(print_uid, sizeof(*print_uid),
"%s.%s.%04x.%02x",
uid->vendor, uid->serial, uid->ssid,
uid->real_unit_addr);
uid.vendor, uid.serial, uid.ssid,
uid.real_unit_addr);
}
static int dasd_eckd_check_cabling(struct dasd_device *device,
@ -1094,16 +1093,16 @@ static int dasd_eckd_check_cabling(struct dasd_device *device,
{
struct dasd_eckd_private *private = device->private;
char print_path_uid[60], print_device_uid[60];
struct dasd_eckd_private path_private;
struct dasd_conf path_conf;
path_private.conf_data = conf_data;
path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
if (dasd_eckd_identify_conf_parts(&path_private))
path_conf.data = conf_data;
path_conf.len = DASD_ECKD_RCD_DATA_SIZE;
if (dasd_eckd_identify_conf_parts(&path_conf))
return 1;
if (dasd_eckd_compare_path_uid(device, &path_private)) {
dasd_eckd_get_uid_string(&path_private, print_path_uid);
dasd_eckd_get_uid_string(private, print_device_uid);
if (dasd_eckd_compare_path_uid(device, &path_conf)) {
dasd_eckd_get_uid_string(&path_conf, print_path_uid);
dasd_eckd_get_uid_string(&private->conf, print_device_uid);
dev_err(&device->cdev->dev,
"Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n",
lpm, print_path_uid, print_device_uid);
@ -1149,11 +1148,11 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
if (!conf_data_saved) {
/* 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)) {
private->conf_data = NULL;
private->conf_len = 0;
private->conf.data = conf_data;
private->conf.len = conf_len;
if (dasd_eckd_identify_conf_parts(&private->conf)) {
private->conf.data = NULL;
private->conf.len = 0;
kfree(conf_data);
continue;
}
@ -1203,7 +1202,7 @@ static u32 get_fcx_max_data(struct dasd_device *device)
return 0;
/* is transport mode supported? */
fcx_in_css = css_general_characteristics.fcx;
fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04;
fcx_in_features = private->features.feature[40] & 0x80;
tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
@ -1272,9 +1271,9 @@ static int rebuild_device_uid(struct dasd_device *device,
"returned error %d", rc);
break;
}
memcpy(private->conf_data, data->rcd_buffer,
memcpy(private->conf.data, data->rcd_buffer,
DASD_ECKD_RCD_DATA_SIZE);
if (dasd_eckd_identify_conf_parts(private)) {
if (dasd_eckd_identify_conf_parts(&private->conf)) {
rc = -ENODEV;
} else /* first valid path is enough */
break;
@ -1289,10 +1288,10 @@ static int rebuild_device_uid(struct dasd_device *device,
static void dasd_eckd_path_available_action(struct dasd_device *device,
struct pe_handler_work_data *data)
{
struct dasd_eckd_private path_private;
__u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
__u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
struct dasd_conf_data *conf_data;
struct dasd_conf path_conf;
unsigned long flags;
char print_uid[60];
int rc, pos;
@ -1356,11 +1355,11 @@ static void dasd_eckd_path_available_action(struct dasd_device *device,
*/
memcpy(&path_rcd_buf, data->rcd_buffer,
DASD_ECKD_RCD_DATA_SIZE);
path_private.conf_data = (void *) &path_rcd_buf;
path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
if (dasd_eckd_identify_conf_parts(&path_private)) {
path_private.conf_data = NULL;
path_private.conf_len = 0;
path_conf.data = (void *)&path_rcd_buf;
path_conf.len = DASD_ECKD_RCD_DATA_SIZE;
if (dasd_eckd_identify_conf_parts(&path_conf)) {
path_conf.data = NULL;
path_conf.len = 0;
continue;
}
@ -1371,7 +1370,7 @@ static void dasd_eckd_path_available_action(struct dasd_device *device,
* the first working path UID will be used as device UID
*/
if (dasd_path_get_opm(device) &&
dasd_eckd_compare_path_uid(device, &path_private)) {
dasd_eckd_compare_path_uid(device, &path_conf)) {
/*
* the comparison was not successful
* rebuild the device UID with at least one
@ -1385,9 +1384,8 @@ static void dasd_eckd_path_available_action(struct dasd_device *device,
*/
if (rebuild_device_uid(device, data) ||
dasd_eckd_compare_path_uid(
device, &path_private)) {
dasd_eckd_get_uid_string(&path_private,
print_uid);
device, &path_conf)) {
dasd_eckd_get_uid_string(&path_conf, print_uid);
dev_err(&device->cdev->dev,
"The newly added channel path %02X "
"will not be used because it leads "
@ -1603,8 +1601,8 @@ static int dasd_eckd_read_vol_info(struct dasd_device *device)
prssdp = cqr->data;
prssdp->order = PSF_ORDER_PRSSD;
prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */
prssdp->lss = private->ned->ID;
prssdp->volume = private->ned->unit_addr;
prssdp->lss = private->conf.ned->ID;
prssdp->volume = private->conf.ned->unit_addr;
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_PSF;
@ -2063,11 +2061,11 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
device->path_thrhld = DASD_ECKD_PATH_THRHLD;
device->path_interval = DASD_ECKD_PATH_INTERVAL;
if (private->gneq) {
if (private->conf.gneq) {
value = 1;
for (i = 0; i < private->gneq->timeout.value; i++)
for (i = 0; i < private->conf.gneq->timeout.value; i++)
value = 10 * value;
value = value * private->gneq->timeout.number;
value = value * private->conf.gneq->timeout.number;
/* do not accept useless values */
if (value != 0 && value <= DASD_EXPIRES_MAX)
device->default_expires = value;
@ -2174,10 +2172,10 @@ static void dasd_eckd_uncheck_device(struct dasd_device *device)
return;
dasd_alias_disconnect_device_from_lcu(device);
private->ned = NULL;
private->sneq = NULL;
private->vdsneq = NULL;
private->gneq = NULL;
private->conf.ned = NULL;
private->conf.sneq = NULL;
private->conf.vdsneq = NULL;
private->conf.gneq = NULL;
dasd_eckd_clear_conf_data(device);
dasd_path_remove_kobjects(device);
}
@ -3729,8 +3727,8 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block,
* subset.
*/
ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01);
ras_data->lss = private->ned->ID;
ras_data->dev_addr = private->ned->unit_addr;
ras_data->lss = private->conf.ned->ID;
ras_data->dev_addr = private->conf.ned->unit_addr;
ras_data->nr_exts = nr_exts;
if (by_extent) {
@ -4272,8 +4270,8 @@ static int prepare_itcw(struct itcw *itcw,
memset(&pfxdata, 0, sizeof(pfxdata));
pfxdata.format = 1; /* PFX with LRE */
pfxdata.base_address = basepriv->ned->unit_addr;
pfxdata.base_lss = basepriv->ned->ID;
pfxdata.base_address = basepriv->conf.ned->unit_addr;
pfxdata.base_lss = basepriv->conf.ned->ID;
pfxdata.validity.define_extent = 1;
/* private uid is kept up to date, conf_data may be outdated */
@ -4942,9 +4940,9 @@ dasd_eckd_fill_info(struct dasd_device * device,
info->characteristics_size = sizeof(private->rdc_data);
memcpy(info->characteristics, &private->rdc_data,
sizeof(private->rdc_data));
info->confdata_size = min((unsigned long)private->conf_len,
sizeof(info->configuration_data));
memcpy(info->configuration_data, private->conf_data,
info->confdata_size = min_t(unsigned long, private->conf.len,
sizeof(info->configuration_data));
memcpy(info->configuration_data, private->conf.data,
info->confdata_size);
return 0;
}
@ -5801,7 +5799,7 @@ static int dasd_eckd_reload_device(struct dasd_device *device)
dasd_eckd_get_uid(device, &uid);
if (old_base != uid.base_unit_addr) {
dasd_eckd_get_uid_string(private, print_uid);
dasd_eckd_get_uid_string(&private->conf, print_uid);
dev_info(&device->cdev->dev,
"An Alias device was reassigned to a new base device "
"with UID: %s\n", print_uid);
@ -5939,8 +5937,8 @@ static int dasd_eckd_query_host_access(struct dasd_device *device,
prssdp->order = PSF_ORDER_PRSSD;
prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
/* LSS and Volume that will be queried */
prssdp->lss = private->ned->ID;
prssdp->volume = private->ned->unit_addr;
prssdp->lss = private->conf.ned->ID;
prssdp->volume = private->conf.ned->unit_addr;
/* all other bytes of prssdp must be zero */
ccw = cqr->cpaddr;

13
drivers/s390/block/dasd_eckd.h
View File

@ -658,16 +658,19 @@ struct dasd_conf_data {
struct dasd_gneq gneq;
} __packed;
struct dasd_eckd_private {
struct dasd_eckd_characteristics rdc_data;
u8 *conf_data;
int conf_len;
struct dasd_conf {
u8 *data;
int len;
/* pointers to specific parts in the conf_data */
struct dasd_ned *ned;
struct dasd_sneq *sneq;
struct vd_sneq *vdsneq;
struct dasd_gneq *gneq;
};
struct dasd_eckd_private {
struct dasd_eckd_characteristics rdc_data;
struct dasd_conf conf;
struct eckd_count count_area[5];
int init_cqr_status;