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-rw-r--r--drivers/s390/block/dasd.c92
-rw-r--r--drivers/s390/block/dasd_3990_erp.c20
-rw-r--r--drivers/s390/block/dasd_devmap.c27
-rw-r--r--drivers/s390/block/dasd_eckd.c699
-rw-r--r--drivers/s390/block/dasd_eckd.h34
-rw-r--r--drivers/s390/block/dasd_int.h17
-rw-r--r--drivers/s390/block/dasd_ioctl.c61
-rw-r--r--drivers/s390/block/dcssblk.c4
8 files changed, 928 insertions, 26 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index c78db05e7..8973d34ce 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -75,6 +75,8 @@ static void dasd_block_timeout(unsigned long);
static void __dasd_process_erp(struct dasd_device *, struct dasd_ccw_req *);
static void dasd_profile_init(struct dasd_profile *, struct dentry *);
static void dasd_profile_exit(struct dasd_profile *);
+static void dasd_hosts_init(struct dentry *, struct dasd_device *);
+static void dasd_hosts_exit(struct dasd_device *);
/*
* SECTION: Operations on the device structure.
@@ -267,6 +269,7 @@ static int dasd_state_known_to_basic(struct dasd_device *device)
dasd_debugfs_setup(dev_name(&device->cdev->dev),
dasd_debugfs_root_entry);
dasd_profile_init(&device->profile, device->debugfs_dentry);
+ dasd_hosts_init(device->debugfs_dentry, device);
/* register 'device' debug area, used for all DBF_DEV_XXX calls */
device->debug_area = debug_register(dev_name(&device->cdev->dev), 4, 1,
@@ -304,6 +307,7 @@ static int dasd_state_basic_to_known(struct dasd_device *device)
return rc;
dasd_device_clear_timer(device);
dasd_profile_exit(&device->profile);
+ dasd_hosts_exit(device);
debugfs_remove(device->debugfs_dentry);
DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device);
if (device->debug_area != NULL) {
@@ -1150,6 +1154,58 @@ int dasd_profile_on(struct dasd_profile *profile)
#endif /* CONFIG_DASD_PROFILE */
+static int dasd_hosts_show(struct seq_file *m, void *v)
+{
+ struct dasd_device *device;
+ int rc = -EOPNOTSUPP;
+
+ device = m->private;
+ dasd_get_device(device);
+
+ if (device->discipline->hosts_print)
+ rc = device->discipline->hosts_print(device, m);
+
+ dasd_put_device(device);
+ return rc;
+}
+
+static int dasd_hosts_open(struct inode *inode, struct file *file)
+{
+ struct dasd_device *device = inode->i_private;
+
+ return single_open(file, dasd_hosts_show, device);
+}
+
+static const struct file_operations dasd_hosts_fops = {
+ .owner = THIS_MODULE,
+ .open = dasd_hosts_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void dasd_hosts_exit(struct dasd_device *device)
+{
+ debugfs_remove(device->hosts_dentry);
+ device->hosts_dentry = NULL;
+}
+
+static void dasd_hosts_init(struct dentry *base_dentry,
+ struct dasd_device *device)
+{
+ struct dentry *pde;
+ umode_t mode;
+
+ if (!base_dentry)
+ return;
+
+ mode = S_IRUSR | S_IFREG;
+ pde = debugfs_create_file("host_access_list", mode, base_dentry,
+ device, &dasd_hosts_fops);
+ if (pde && !IS_ERR(pde))
+ device->hosts_dentry = pde;
+}
+
/*
* Allocate memory for a channel program with 'cplength' channel
* command words and 'datasize' additional space. There are two
@@ -1582,6 +1638,9 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
struct dasd_ccw_req *cqr, *next;
struct dasd_device *device;
unsigned long long now;
+ int nrf_suppressed = 0;
+ int fp_suppressed = 0;
+ u8 *sense = NULL;
int expires;
if (IS_ERR(irb)) {
@@ -1617,7 +1676,23 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
dasd_put_device(device);
return;
}
- device->discipline->dump_sense_dbf(device, irb, "int");
+
+ /*
+ * In some cases 'File Protected' or 'No Record Found' errors
+ * might be expected and debug log messages for the
+ * corresponding interrupts shouldn't be written then.
+ * Check if either of the according suppress bits is set.
+ */
+ sense = dasd_get_sense(irb);
+ if (sense) {
+ fp_suppressed = (sense[1] & SNS1_FILE_PROTECTED) &&
+ test_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
+ nrf_suppressed = (sense[1] & SNS1_NO_REC_FOUND) &&
+ test_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
+ }
+ if (!(fp_suppressed || nrf_suppressed))
+ device->discipline->dump_sense_dbf(device, irb, "int");
+
if (device->features & DASD_FEATURE_ERPLOG)
device->discipline->dump_sense(device, cqr, irb);
device->discipline->check_for_device_change(device, cqr, irb);
@@ -2256,6 +2331,7 @@ static int _dasd_sleep_on_queue(struct list_head *ccw_queue, int interruptible)
{
struct dasd_device *device;
struct dasd_ccw_req *cqr, *n;
+ u8 *sense = NULL;
int rc;
retry:
@@ -2302,6 +2378,20 @@ retry:
rc = 0;
list_for_each_entry_safe(cqr, n, ccw_queue, blocklist) {
/*
+ * In some cases the 'File Protected' or 'Incorrect Length'
+ * error might be expected and error recovery would be
+ * unnecessary in these cases. Check if the according suppress
+ * bit is set.
+ */
+ sense = dasd_get_sense(&cqr->irb);
+ if (sense && sense[1] & SNS1_FILE_PROTECTED &&
+ test_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags))
+ continue;
+ if (scsw_cstat(&cqr->irb.scsw) == 0x40 &&
+ test_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags))
+ continue;
+
+ /*
* for alias devices simplify error recovery and
* return to upper layer
* do not skip ERP requests
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index d26134713..8305ab688 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -1367,8 +1367,14 @@ dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
struct dasd_device *device = default_erp->startdev;
- dev_err(&device->cdev->dev,
- "The specified record was not found\n");
+ /*
+ * In some cases the 'No Record Found' error might be expected and
+ * log messages shouldn't be written then.
+ * Check if the according suppress bit is set.
+ */
+ if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags))
+ dev_err(&device->cdev->dev,
+ "The specified record was not found\n");
return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
@@ -1393,8 +1399,14 @@ dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
struct dasd_device *device = erp->startdev;
- dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
- "a hardware error\n");
+ /*
+ * In some cases the 'File Protected' error might be expected and
+ * log messages shouldn't be written then.
+ * Check if the according suppress bit is set.
+ */
+ if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags))
+ dev_err(&device->cdev->dev,
+ "Accessing the DASD failed because of a hardware error\n");
return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 2f18f6109..3cdbce45e 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -982,6 +982,32 @@ out:
static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store);
static ssize_t
+dasd_access_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct dasd_device *device;
+ int count;
+
+ device = dasd_device_from_cdev(cdev);
+ if (IS_ERR(device))
+ return PTR_ERR(device);
+
+ if (device->discipline->host_access_count)
+ count = device->discipline->host_access_count(device);
+ else
+ count = -EOPNOTSUPP;
+
+ dasd_put_device(device);
+ if (count < 0)
+ return count;
+
+ return sprintf(buf, "%d\n", count);
+}
+
+static DEVICE_ATTR(host_access_count, 0444, dasd_access_show, NULL);
+
+static ssize_t
dasd_discipline_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -1471,6 +1497,7 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_reservation_policy.attr,
&dev_attr_last_known_reservation_state.attr,
&dev_attr_safe_offline.attr,
+ &dev_attr_host_access_count.attr,
&dev_attr_path_masks.attr,
NULL,
};
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index c1b4ae55e..42b34cd1f 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/compat.h>
#include <linux/init.h>
+#include <linux/seq_file.h>
#include <asm/css_chars.h>
#include <asm/debug.h>
@@ -120,6 +121,11 @@ struct check_attention_work_data {
__u8 lpum;
};
+static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
+ struct dasd_device *, struct dasd_device *,
+ unsigned int, int, unsigned int, unsigned int,
+ unsigned int, unsigned int);
+
/* initial attempt at a probe function. this can be simplified once
* the other detection code is gone */
static int
@@ -256,10 +262,13 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
case DASD_ECKD_CCW_READ_CKD_MT:
case DASD_ECKD_CCW_READ_KD:
case DASD_ECKD_CCW_READ_KD_MT:
- case DASD_ECKD_CCW_READ_COUNT:
data->mask.perm = 0x1;
data->attributes.operation = private->attrib.operation;
break;
+ case DASD_ECKD_CCW_READ_COUNT:
+ data->mask.perm = 0x1;
+ data->attributes.operation = DASD_BYPASS_CACHE;
+ break;
case DASD_ECKD_CCW_WRITE:
case DASD_ECKD_CCW_WRITE_MT:
case DASD_ECKD_CCW_WRITE_KD:
@@ -528,10 +537,13 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
case DASD_ECKD_CCW_READ_CKD_MT:
case DASD_ECKD_CCW_READ_KD:
case DASD_ECKD_CCW_READ_KD_MT:
- case DASD_ECKD_CCW_READ_COUNT:
dedata->mask.perm = 0x1;
dedata->attributes.operation = basepriv->attrib.operation;
break;
+ case DASD_ECKD_CCW_READ_COUNT:
+ dedata->mask.perm = 0x1;
+ dedata->attributes.operation = DASD_BYPASS_CACHE;
+ break;
case DASD_ECKD_CCW_READ_TRACK:
case DASD_ECKD_CCW_READ_TRACK_DATA:
dedata->mask.perm = 0x1;
@@ -2095,6 +2107,180 @@ dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
return 0;
}
+/*
+ * Build the TCW request for the format check
+ */
+static struct dasd_ccw_req *
+dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
+ int enable_pav, struct eckd_count *fmt_buffer,
+ int rpt)
+{
+ struct dasd_eckd_private *start_priv;
+ struct dasd_device *startdev = NULL;
+ struct tidaw *last_tidaw = NULL;
+ struct dasd_ccw_req *cqr;
+ struct itcw *itcw;
+ int itcw_size;
+ int count;
+ int rc;
+ int i;
+
+ if (enable_pav)
+ startdev = dasd_alias_get_start_dev(base);
+
+ if (!startdev)
+ startdev = base;
+
+ start_priv = startdev->private;
+
+ count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
+
+ /*
+ * we're adding 'count' amount of tidaw to the itcw.
+ * calculate the corresponding itcw_size
+ */
+ itcw_size = itcw_calc_size(0, count, 0);
+
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
+ if (IS_ERR(cqr))
+ return cqr;
+
+ start_priv->count++;
+
+ itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
+ if (IS_ERR(itcw)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ cqr->cpaddr = itcw_get_tcw(itcw);
+ rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
+ DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
+ sizeof(struct eckd_count),
+ count * sizeof(struct eckd_count), 0, rpt);
+ if (rc)
+ goto out_err;
+
+ for (i = 0; i < count; i++) {
+ last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
+ sizeof(struct eckd_count));
+ if (IS_ERR(last_tidaw)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+ }
+
+ last_tidaw->flags |= TIDAW_FLAGS_LAST;
+ itcw_finalize(itcw);
+
+ cqr->cpmode = 1;
+ cqr->startdev = startdev;
+ cqr->memdev = startdev;
+ cqr->basedev = base;
+ cqr->retries = startdev->default_retries;
+ cqr->expires = startdev->default_expires * HZ;
+ cqr->buildclk = get_tod_clock();
+ cqr->status = DASD_CQR_FILLED;
+ /* Set flags to suppress output for expected errors */
+ set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
+ set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
+
+ return cqr;
+
+out_err:
+ dasd_sfree_request(cqr, startdev);
+
+ return ERR_PTR(rc);
+}
+
+/*
+ * Build the CCW request for the format check
+ */
+static struct dasd_ccw_req *
+dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
+ int enable_pav, struct eckd_count *fmt_buffer, int rpt)
+{
+ struct dasd_eckd_private *start_priv;
+ struct dasd_eckd_private *base_priv;
+ struct dasd_device *startdev = NULL;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ void *data;
+ int cplength, datasize;
+ int use_prefix;
+ int count;
+ int i;
+
+ if (enable_pav)
+ startdev = dasd_alias_get_start_dev(base);
+
+ if (!startdev)
+ startdev = base;
+
+ start_priv = startdev->private;
+ base_priv = base->private;
+
+ count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
+
+ use_prefix = base_priv->features.feature[8] & 0x01;
+
+ if (use_prefix) {
+ cplength = 1;
+ datasize = sizeof(struct PFX_eckd_data);
+ } else {
+ cplength = 2;
+ datasize = sizeof(struct DE_eckd_data) +
+ sizeof(struct LO_eckd_data);
+ }
+ cplength += count;
+
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
+ startdev);
+ if (IS_ERR(cqr))
+ return cqr;
+
+ start_priv->count++;
+ data = cqr->data;
+ ccw = cqr->cpaddr;
+
+ if (use_prefix) {
+ prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
+ DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
+ count, 0, 0);
+ } else {
+ define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
+ DASD_ECKD_CCW_READ_COUNT, startdev);
+
+ data += sizeof(struct DE_eckd_data);
+ ccw[-1].flags |= CCW_FLAG_CC;
+
+ locate_record(ccw++, data, fdata->start_unit, 0, count,
+ DASD_ECKD_CCW_READ_COUNT, base, 0);
+ }
+
+ for (i = 0; i < count; i++) {
+ ccw[-1].flags |= CCW_FLAG_CC;
+ ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
+ ccw->flags = CCW_FLAG_SLI;
+ ccw->count = 8;
+ ccw->cda = (__u32)(addr_t) fmt_buffer;
+ ccw++;
+ fmt_buffer++;
+ }
+
+ cqr->startdev = startdev;
+ cqr->memdev = startdev;
+ cqr->basedev = base;
+ cqr->retries = DASD_RETRIES;
+ cqr->expires = startdev->default_expires * HZ;
+ cqr->buildclk = get_tod_clock();
+ cqr->status = DASD_CQR_FILLED;
+ /* Set flags to suppress output for expected errors */
+ set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
+
+ return cqr;
+}
+
static struct dasd_ccw_req *
dasd_eckd_build_format(struct dasd_device *base,
struct format_data_t *fdata,
@@ -2362,9 +2548,24 @@ dasd_eckd_build_format(struct dasd_device *base,
*/
static struct dasd_ccw_req *
dasd_eckd_format_build_ccw_req(struct dasd_device *base,
- struct format_data_t *fdata, int enable_pav)
+ struct format_data_t *fdata, int enable_pav,
+ int tpm, struct eckd_count *fmt_buffer, int rpt)
{
- return dasd_eckd_build_format(base, fdata, enable_pav);
+ struct dasd_ccw_req *ccw_req;
+
+ if (!fmt_buffer) {
+ ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
+ } else {
+ if (tpm)
+ ccw_req = dasd_eckd_build_check_tcw(base, fdata,
+ enable_pav,
+ fmt_buffer, rpt);
+ else
+ ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
+ fmt_buffer, rpt);
+ }
+
+ return ccw_req;
}
/*
@@ -2409,12 +2610,15 @@ static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
*/
static int dasd_eckd_format_process_data(struct dasd_device *base,
struct format_data_t *fdata,
- int enable_pav)
+ int enable_pav, int tpm,
+ struct eckd_count *fmt_buffer, int rpt,
+ struct irb *irb)
{
struct dasd_eckd_private *private = base->private;
struct dasd_ccw_req *cqr, *n;
struct list_head format_queue;
struct dasd_device *device;
+ char *sense = NULL;
int old_start, old_stop, format_step;
int step, retry;
int rc;
@@ -2428,8 +2632,18 @@ static int dasd_eckd_format_process_data(struct dasd_device *base,
old_start = fdata->start_unit;
old_stop = fdata->stop_unit;
- format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0,
- fdata->blksize);
+ if (!tpm && fmt_buffer != NULL) {
+ /* Command Mode / Format Check */
+ format_step = 1;
+ } else if (tpm && fmt_buffer != NULL) {
+ /* Transport Mode / Format Check */
+ format_step = DASD_CQR_MAX_CCW / rpt;
+ } else {
+ /* Normal Formatting */
+ format_step = DASD_CQR_MAX_CCW /
+ recs_per_track(&private->rdc_data, 0, fdata->blksize);
+ }
+
do {
retry = 0;
while (fdata->start_unit <= old_stop) {
@@ -2440,7 +2654,8 @@ static int dasd_eckd_format_process_data(struct dasd_device *base,
}
cqr = dasd_eckd_format_build_ccw_req(base, fdata,
- enable_pav);
+ enable_pav, tpm,
+ fmt_buffer, rpt);
if (IS_ERR(cqr)) {
rc = PTR_ERR(cqr);
if (rc == -ENOMEM) {
@@ -2458,6 +2673,10 @@ static int dasd_eckd_format_process_data(struct dasd_device *base,
}
list_add_tail(&cqr->blocklist, &format_queue);
+ if (fmt_buffer) {
+ step = fdata->stop_unit - fdata->start_unit + 1;
+ fmt_buffer += rpt * step;
+ }
fdata->start_unit = fdata->stop_unit + 1;
fdata->stop_unit = old_stop;
}
@@ -2468,15 +2687,41 @@ out_err:
list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
device = cqr->startdev;
private = device->private;
- if (cqr->status == DASD_CQR_FAILED)
+
+ if (cqr->status == DASD_CQR_FAILED) {
+ /*
+ * Only get sense data if called by format
+ * check
+ */
+ if (fmt_buffer && irb) {
+ sense = dasd_get_sense(&cqr->irb);
+ memcpy(irb, &cqr->irb, sizeof(*irb));
+ }
rc = -EIO;
+ }
list_del_init(&cqr->blocklist);
dasd_sfree_request(cqr, device);
private->count--;
}
- if (rc)
+ if (rc && rc != -EIO)
goto out;
+ if (rc == -EIO) {
+ /*
+ * In case fewer than the expected records are on the
+ * track, we will most likely get a 'No Record Found'
+ * error (in command mode) or a 'File Protected' error
+ * (in transport mode). Those particular cases shouldn't
+ * pass the -EIO to the IOCTL, therefore reset the rc
+ * and continue.
+ */
+ if (sense &&
+ (sense[1] & SNS1_NO_REC_FOUND ||
+ sense[1] & SNS1_FILE_PROTECTED))
+ retry = 1;
+ else
+ goto out;
+ }
} while (retry);
@@ -2490,7 +2735,225 @@ out:
static int dasd_eckd_format_device(struct dasd_device *base,
struct format_data_t *fdata, int enable_pav)
{
- return dasd_eckd_format_process_data(base, fdata, enable_pav);
+ return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
+ 0, NULL);
+}
+
+/*
+ * Helper function to count consecutive records of a single track.
+ */
+static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
+ int max)
+{
+ int head;
+ int i;
+
+ head = fmt_buffer[start].head;
+
+ /*
+ * There are 3 conditions where we stop counting:
+ * - if data reoccurs (same head and record may reoccur), which may
+ * happen due to the way DASD_ECKD_CCW_READ_COUNT works
+ * - when the head changes, because we're iterating over several tracks
+ * then (DASD_ECKD_CCW_READ_COUNT_MT)
+ * - when we've reached the end of sensible data in the buffer (the
+ * record will be 0 then)
+ */
+ for (i = start; i < max; i++) {
+ if (i > start) {
+ if ((fmt_buffer[i].head == head &&
+ fmt_buffer[i].record == 1) ||
+ fmt_buffer[i].head != head ||
+ fmt_buffer[i].record == 0)
+ break;
+ }
+ }
+
+ return i - start;
+}
+
+/*
+ * Evaluate a given range of tracks. Data like number of records, blocksize,
+ * record ids, and key length are compared with expected data.
+ *
+ * If a mismatch occurs, the corresponding error bit is set, as well as
+ * additional information, depending on the error.
+ */
+static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
+ struct format_check_t *cdata,
+ int rpt_max, int rpt_exp,
+ int trk_per_cyl, int tpm)
+{
+ struct ch_t geo;
+ int max_entries;
+ int count = 0;
+ int trkcount;
+ int blksize;
+ int pos = 0;
+ int i, j;
+ int kl;
+
+ trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
+ max_entries = trkcount * rpt_max;
+
+ for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
+ /* Calculate the correct next starting position in the buffer */
+ if (tpm) {
+ while (fmt_buffer[pos].record == 0 &&
+ fmt_buffer[pos].dl == 0) {
+ if (pos++ > max_entries)
+ break;
+ }
+ } else {
+ if (i != cdata->expect.start_unit)
+ pos += rpt_max - count;
+ }
+
+ /* Calculate the expected geo values for the current track */
+ set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
+
+ /* Count and check number of records */
+ count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
+
+ if (count < rpt_exp) {
+ cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
+ break;
+ }
+ if (count > rpt_exp) {
+ cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
+ break;
+ }
+
+ for (j = 0; j < count; j++, pos++) {
+ blksize = cdata->expect.blksize;
+ kl = 0;
+
+ /*
+ * Set special values when checking CDL formatted
+ * devices.
+ */
+ if ((cdata->expect.intensity & 0x08) &&
+ geo.cyl == 0 && geo.head == 0) {
+ if (j < 3) {
+ blksize = sizes_trk0[j] - 4;
+ kl = 4;
+ }
+ }
+ if ((cdata->expect.intensity & 0x08) &&
+ geo.cyl == 0 && geo.head == 1) {
+ blksize = LABEL_SIZE - 44;
+ kl = 44;
+ }
+
+ /* Check blocksize */
+ if (fmt_buffer[pos].dl != blksize) {
+ cdata->result = DASD_FMT_ERR_BLKSIZE;
+ goto out;
+ }
+ /* Check if key length is 0 */
+ if (fmt_buffer[pos].kl != kl) {
+ cdata->result = DASD_FMT_ERR_KEY_LENGTH;
+ goto out;
+ }
+ /* Check if record_id is correct */
+ if (fmt_buffer[pos].cyl != geo.cyl ||
+ fmt_buffer[pos].head != geo.head ||
+ fmt_buffer[pos].record != (j + 1)) {
+ cdata->result = DASD_FMT_ERR_RECORD_ID;
+ goto out;
+ }
+ }
+ }
+
+out:
+ /*
+ * In case of no errors, we need to decrease by one
+ * to get the correct positions.
+ */
+ if (!cdata->result) {
+ i--;
+ pos--;
+ }
+
+ cdata->unit = i;
+ cdata->num_records = count;
+ cdata->rec = fmt_buffer[pos].record;
+ cdata->blksize = fmt_buffer[pos].dl;
+ cdata->key_length = fmt_buffer[pos].kl;
+}
+
+/*
+ * Check the format of a range of tracks of a DASD.
+ */
+static int dasd_eckd_check_device_format(struct dasd_device *base,
+ struct format_check_t *cdata,
+ int enable_pav)
+{
+ struct dasd_eckd_private *private = base->private;
+ struct eckd_count *fmt_buffer;
+ struct irb irb;
+ int rpt_max, rpt_exp;
+ int fmt_buffer_size;
+ int trk_per_cyl;
+ int trkcount;
+ int tpm = 0;
+ int rc;
+
+ trk_per_cyl = private->rdc_data.trk_per_cyl;
+
+ /* Get maximum and expected amount of records per track */
+ rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
+ rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
+
+ trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
+ fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
+
+ fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
+ if (!fmt_buffer)
+ return -ENOMEM;
+
+ /*
+ * A certain FICON feature subset is needed to operate in transport
+ * mode. Additionally, the support for transport mode is implicitly
+ * checked by comparing the buffer size with fcx_max_data. As long as
+ * the buffer size is smaller we can operate in transport mode and
+ * process multiple tracks. If not, only one track at once is being
+ * processed using command mode.
+ */
+ if ((private->features.feature[40] & 0x04) &&
+ fmt_buffer_size <= private->fcx_max_data)
+ tpm = 1;
+
+ rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
+ tpm, fmt_buffer, rpt_max, &irb);
+ if (rc && rc != -EIO)
+ goto out;
+ if (rc == -EIO) {
+ /*
+ * If our first attempt with transport mode enabled comes back
+ * with an incorrect length error, we're going to retry the
+ * check with command mode.
+ */
+ if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
+ tpm = 0;
+ rc = dasd_eckd_format_process_data(base, &cdata->expect,
+ enable_pav, tpm,
+ fmt_buffer, rpt_max,
+ &irb);
+ if (rc)
+ goto out;
+ } else {
+ goto out;
+ }
+ }
+
+ dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
+ trk_per_cyl, tpm);
+
+out:
+ kfree(fmt_buffer);
+
+ return rc;
}
static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
@@ -3037,6 +3500,16 @@ static int prepare_itcw(struct itcw *itcw,
lredata->auxiliary.check_bytes = 0x2;
pfx_cmd = DASD_ECKD_CCW_PFX;
break;
+ case DASD_ECKD_CCW_READ_COUNT_MT:
+ dedata->mask.perm = 0x1;
+ dedata->attributes.operation = DASD_BYPASS_CACHE;
+ dedata->ga_extended |= 0x42;
+ dedata->blk_size = blksize;
+ lredata->operation.orientation = 0x2;
+ lredata->operation.operation = 0x16;
+ lredata->auxiliary.check_bytes = 0x01;
+ pfx_cmd = DASD_ECKD_CCW_PFX_READ;
+ break;
default:
DBF_DEV_EVENT(DBF_ERR, basedev,
"prepare itcw, unknown opcode 0x%x", cmd);
@@ -3084,13 +3557,19 @@ static int prepare_itcw(struct itcw *itcw,
}
}
- lredata->auxiliary.length_valid = 1;
- lredata->auxiliary.length_scope = 1;
+ if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
+ lredata->auxiliary.length_valid = 0;
+ lredata->auxiliary.length_scope = 0;
+ lredata->sector = 0xff;
+ } else {
+ lredata->auxiliary.length_valid = 1;
+ lredata->auxiliary.length_scope = 1;
+ lredata->sector = sector;
+ }
lredata->auxiliary.imbedded_ccw_valid = 1;
lredata->length = tlf;
lredata->imbedded_ccw = cmd;
lredata->count = count;
- lredata->sector = sector;
set_ch_t(&lredata->seek_addr, begcyl, beghead);
lredata->search_arg.cyl = lredata->seek_addr.cyl;
lredata->search_arg.head = lredata->seek_addr.head;
@@ -4412,10 +4891,34 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
static void dasd_eckd_dump_sense(struct dasd_device *device,
struct dasd_ccw_req *req, struct irb *irb)
{
- if (scsw_is_tm(&irb->scsw))
+ u8 *sense = dasd_get_sense(irb);
+
+ if (scsw_is_tm(&irb->scsw)) {
+ /*
+ * In some cases the 'File Protected' or 'Incorrect Length'
+ * error might be expected and log messages shouldn't be written
+ * then. Check if the according suppress bit is set.
+ */
+ if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
+ test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
+ return;
+ if (scsw_cstat(&irb->scsw) == 0x40 &&
+ test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
+ return;
+
dasd_eckd_dump_sense_tcw(device, req, irb);
- else
+ } else {
+ /*
+ * In some cases the 'No Record Found' error might be expected
+ * and log messages shouldn't be written then. Check if the
+ * according suppress bit is set.
+ */
+ if (sense && sense[1] & SNS1_NO_REC_FOUND &&
+ test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
+ return;
+
dasd_eckd_dump_sense_ccw(device, req, irb);
+ }
}
static int dasd_eckd_pm_freeze(struct dasd_device *device)
@@ -4627,6 +5130,167 @@ static int dasd_eckd_read_message_buffer(struct dasd_device *device,
return rc;
}
+static int dasd_eckd_query_host_access(struct dasd_device *device,
+ struct dasd_psf_query_host_access *data)
+{
+ struct dasd_eckd_private *private = device->private;
+ struct dasd_psf_query_host_access *host_access;
+ struct dasd_psf_prssd_data *prssdp;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ int rc;
+
+ /* not available for HYPER PAV alias devices */
+ if (!device->block && private->lcu->pav == HYPER_PAV)
+ return -EOPNOTSUPP;
+
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
+ sizeof(struct dasd_psf_prssd_data) + 1,
+ device);
+ if (IS_ERR(cqr)) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "Could not allocate read message buffer request");
+ return PTR_ERR(cqr);
+ }
+ host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
+ if (!host_access) {
+ dasd_sfree_request(cqr, device);
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "Could not allocate host_access buffer");
+ return -ENOMEM;
+ }
+ cqr->startdev = device;
+ cqr->memdev = device;
+ cqr->block = NULL;
+ cqr->retries = 256;
+ cqr->expires = 10 * HZ;
+
+ /* Prepare for Read Subsystem Data */
+ prssdp = (struct dasd_psf_prssd_data *) cqr->data;
+ memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
+ 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;
+ /* all other bytes of prssdp must be zero */
+
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = DASD_ECKD_CCW_PSF;
+ ccw->count = sizeof(struct dasd_psf_prssd_data);
+ ccw->flags |= CCW_FLAG_CC;
+ ccw->flags |= CCW_FLAG_SLI;
+ ccw->cda = (__u32)(addr_t) prssdp;
+
+ /* Read Subsystem Data - query host access */
+ ccw++;
+ ccw->cmd_code = DASD_ECKD_CCW_RSSD;
+ ccw->count = sizeof(struct dasd_psf_query_host_access);
+ ccw->flags |= CCW_FLAG_SLI;
+ ccw->cda = (__u32)(addr_t) host_access;
+
+ cqr->buildclk = get_tod_clock();
+ cqr->status = DASD_CQR_FILLED;
+ rc = dasd_sleep_on(cqr);
+ if (rc == 0) {
+ *data = *host_access;
+ } else {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
+ "Reading host access data failed with rc=%d\n",
+ rc);
+ rc = -EOPNOTSUPP;
+ }
+
+ dasd_sfree_request(cqr, cqr->memdev);
+ kfree(host_access);
+ return rc;
+}
+/*
+ * return number of grouped devices
+ */
+static int dasd_eckd_host_access_count(struct dasd_device *device)
+{
+ struct dasd_psf_query_host_access *access;
+ struct dasd_ckd_path_group_entry *entry;
+ struct dasd_ckd_host_information *info;
+ int count = 0;
+ int rc, i;
+
+ access = kzalloc(sizeof(*access), GFP_NOIO);
+ if (!access) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "Could not allocate access buffer");
+ return -ENOMEM;
+ }
+ rc = dasd_eckd_query_host_access(device, access);
+ if (rc) {
+ kfree(access);
+ return rc;
+ }
+
+ info = (struct dasd_ckd_host_information *)
+ access->host_access_information;
+ for (i = 0; i < info->entry_count; i++) {
+ entry = (struct dasd_ckd_path_group_entry *)
+ (info->entry + i * info->entry_size);
+ if (entry->status_flags & DASD_ECKD_PG_GROUPED)
+ count++;
+ }
+
+ kfree(access);
+ return count;
+}
+
+/*
+ * write host access information to a sequential file
+ */
+static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
+{
+ struct dasd_psf_query_host_access *access;
+ struct dasd_ckd_path_group_entry *entry;
+ struct dasd_ckd_host_information *info;
+ char sysplex[9] = "";
+ int rc, i, j;
+
+ access = kzalloc(sizeof(*access), GFP_NOIO);
+ if (!access) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "Could not allocate access buffer");
+ return -ENOMEM;
+ }
+ rc = dasd_eckd_query_host_access(device, access);
+ if (rc) {
+ kfree(access);
+ return rc;
+ }
+
+ info = (struct dasd_ckd_host_information *)
+ access->host_access_information;
+ for (i = 0; i < info->entry_count; i++) {
+ entry = (struct dasd_ckd_path_group_entry *)
+ (info->entry + i * info->entry_size);
+ /* PGID */
+ seq_puts(m, "pgid ");
+ for (j = 0; j < 11; j++)
+ seq_printf(m, "%02x", entry->pgid[j]);
+ seq_putc(m, '\n');
+ /* FLAGS */
+ seq_printf(m, "status_flags %02x\n", entry->status_flags);
+ /* SYSPLEX NAME */
+ memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
+ EBCASC(sysplex, sizeof(sysplex));
+ seq_printf(m, "sysplex_name %8s\n", sysplex);
+ /* SUPPORTED CYLINDER */
+ seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
+ /* TIMESTAMP */
+ seq_printf(m, "timestamp %lu\n", (unsigned long)
+ entry->timestamp);
+ }
+ kfree(access);
+
+ return 0;
+}
+
/*
* Perform Subsystem Function - CUIR response
*/
@@ -5084,6 +5748,7 @@ static struct dasd_discipline dasd_eckd_discipline = {
.term_IO = dasd_term_IO,
.handle_terminated_request = dasd_eckd_handle_terminated_request,
.format_device = dasd_eckd_format_device,
+ .check_device_format = dasd_eckd_check_device_format,
.erp_action = dasd_eckd_erp_action,
.erp_postaction = dasd_eckd_erp_postaction,
.check_for_device_change = dasd_eckd_check_for_device_change,
@@ -5099,6 +5764,8 @@ static struct dasd_discipline dasd_eckd_discipline = {
.get_uid = dasd_eckd_get_uid,
.kick_validate = dasd_eckd_kick_validate_server,
.check_attention = dasd_eckd_check_attention,
+ .host_access_count = dasd_eckd_host_access_count,
+ .hosts_print = dasd_hosts_print,
};
static int __init
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 6d9a6d351..59803626e 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -35,6 +35,7 @@
#define DASD_ECKD_CCW_READ_MT 0x86
#define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
#define DASD_ECKD_CCW_READ_KD_MT 0x8e
+#define DASD_ECKD_CCW_READ_COUNT_MT 0x92
#define DASD_ECKD_CCW_RELEASE 0x94
#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
@@ -53,6 +54,7 @@
*/
#define PSF_ORDER_PRSSD 0x18
#define PSF_ORDER_CUIR_RESPONSE 0x1A
+#define PSF_SUBORDER_QHA 0x1C
#define PSF_ORDER_SSC 0x1D
/*
@@ -81,6 +83,8 @@
#define ATTENTION_LENGTH_CUIR 0x0e
#define ATTENTION_FORMAT_CUIR 0x01
+#define DASD_ECKD_PG_GROUPED 0x10
+
/*
* Size that is reportet for large volumes in the old 16-bit no_cyl field
*/
@@ -403,13 +407,41 @@ struct dasd_psf_cuir_response {
__u8 ssid;
} __packed;
+struct dasd_ckd_path_group_entry {
+ __u8 status_flags;
+ __u8 pgid[11];
+ __u8 sysplex_name[8];
+ __u32 timestamp;
+ __u32 cylinder;
+ __u8 reserved[4];
+} __packed;
+
+struct dasd_ckd_host_information {
+ __u8 access_flags;
+ __u8 entry_size;
+ __u16 entry_count;
+ __u8 entry[16390];
+} __packed;
+
+struct dasd_psf_query_host_access {
+ __u8 access_flag;
+ __u8 version;
+ __u16 CKD_length;
+ __u16 SCSI_length;
+ __u8 unused[10];
+ __u8 host_access_information[16394];
+} __packed;
+
/*
* Perform Subsystem Function - Prepare for Read Subsystem Data
*/
struct dasd_psf_prssd_data {
unsigned char order;
unsigned char flags;
- unsigned char reserved[4];
+ unsigned char reserved1;
+ unsigned char reserved2;
+ unsigned char lss;
+ unsigned char volume;
unsigned char suborder;
unsigned char varies[5];
} __attribute__ ((packed));
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 0f0add932..ac7027e6d 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -236,6 +236,13 @@ struct dasd_ccw_req {
* stolen. Should not be combined with
* DASD_CQR_FLAGS_USE_ERP
*/
+/*
+ * The following flags are used to suppress output of certain errors.
+ * These flags should only be used for format checks!
+ */
+#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */
+#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/
+#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */
/* Signature for error recovery functions. */
typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
@@ -318,7 +325,8 @@ struct dasd_discipline {
* Device operation functions. build_cp creates a ccw chain for
* a block device request, start_io starts the request and
* term_IO cancels it (e.g. in case of a timeout). format_device
- * returns a ccw chain to be used to format the device.
+ * formats the device and check_device_format compares the format of
+ * a device with the expected format_data.
* handle_terminated_request allows to examine a cqr and prepare
* it for retry.
*/
@@ -329,7 +337,9 @@ 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 *, int enable_pav);
+ struct format_data_t *, int);
+ int (*check_device_format)(struct dasd_device *,
+ struct format_check_t *, int);
int (*free_cp) (struct dasd_ccw_req *, struct request *);
/*
@@ -365,6 +375,8 @@ struct dasd_discipline {
int (*get_uid) (struct dasd_device *, struct dasd_uid *);
void (*kick_validate) (struct dasd_device *);
int (*check_attention)(struct dasd_device *, __u8);
+ int (*host_access_count)(struct dasd_device *);
+ int (*hosts_print)(struct dasd_device *, struct seq_file *);
};
extern struct dasd_discipline *dasd_diag_discipline_pointer;
@@ -487,6 +499,7 @@ struct dasd_device {
unsigned long blk_timeout;
struct dentry *debugfs_dentry;
+ struct dentry *hosts_dentry;
struct dasd_profile profile;
};
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 90f30cc31..9dfbd972f 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -238,6 +238,23 @@ dasd_format(struct dasd_block *block, struct format_data_t *fdata)
return rc;
}
+static int dasd_check_format(struct dasd_block *block,
+ struct format_check_t *cdata)
+{
+ struct dasd_device *base;
+ int rc;
+
+ base = block->base;
+ if (!base->discipline->check_device_format)
+ return -ENOTTY;
+
+ rc = base->discipline->check_device_format(base, cdata, 1);
+ if (rc == -EAGAIN)
+ rc = base->discipline->check_device_format(base, cdata, 0);
+
+ return rc;
+}
+
/*
* Format device.
*/
@@ -272,6 +289,47 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp)
}
rc = dasd_format(base->block, &fdata);
dasd_put_device(base);
+
+ return rc;
+}
+
+/*
+ * Check device format
+ */
+static int dasd_ioctl_check_format(struct block_device *bdev, void __user *argp)
+{
+ struct format_check_t cdata;
+ struct dasd_device *base;
+ int rc = 0;
+
+ if (!argp)
+ return -EINVAL;
+
+ base = dasd_device_from_gendisk(bdev->bd_disk);
+ if (!base)
+ return -ENODEV;
+ if (bdev != bdev->bd_contains) {
+ pr_warn("%s: The specified DASD is a partition and cannot be checked\n",
+ dev_name(&base->cdev->dev));
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (copy_from_user(&cdata, argp, sizeof(cdata))) {
+ rc = -EFAULT;
+ goto out_err;
+ }
+
+ rc = dasd_check_format(base->block, &cdata);
+ if (rc)
+ goto out_err;
+
+ if (copy_to_user(argp, &cdata, sizeof(cdata)))
+ rc = -EFAULT;
+
+out_err:
+ dasd_put_device(base);
+
return rc;
}
@@ -519,6 +577,9 @@ int dasd_ioctl(struct block_device *bdev, fmode_t mode,
case BIODASDFMT:
rc = dasd_ioctl_format(bdev, argp);
break;
+ case BIODASDCHECKFMT:
+ rc = dasd_ioctl_check_format(bdev, argp);
+ break;
case BIODASDINFO:
rc = dasd_ioctl_information(block, cmd, argp);
break;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index b83908670..bed53c46d 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -31,7 +31,7 @@ static void dcssblk_release(struct gendisk *disk, fmode_t mode);
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 __pmem **kaddr, pfn_t *pfn);
+ void __pmem **kaddr, pfn_t *pfn, long size);
static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
@@ -884,7 +884,7 @@ fail:
static long
dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
- void __pmem **kaddr, pfn_t *pfn)
+ void __pmem **kaddr, pfn_t *pfn, long size)
{
struct dcssblk_dev_info *dev_info;
unsigned long offset, dev_sz;