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Diffstat (limited to 'drivers/s390/block')
-rw-r--r--drivers/s390/block/dasd.c32
-rw-r--r--drivers/s390/block/dasd_3990_erp.c2
-rw-r--r--drivers/s390/block/dasd_devmap.c28
-rw-r--r--drivers/s390/block/dasd_eckd.c132
-rw-r--r--drivers/s390/block/dasd_eer.c6
-rw-r--r--drivers/s390/block/dasd_fba.c4
-rw-r--r--drivers/s390/block/dasd_int.h4
-rw-r--r--drivers/s390/block/dasd_proc.c5
-rw-r--r--drivers/s390/block/dcssblk.c520
-rw-r--r--drivers/s390/block/xpram.c37
10 files changed, 568 insertions, 202 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index acb78017e7d0..0a225ccda026 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -215,7 +215,7 @@ static int dasd_state_known_to_basic(struct dasd_device *device)
return rc;
}
/* register 'device' debug area, used for all DBF_DEV_XXX calls */
- device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 1,
+ device->debug_area = debug_register(dev_name(&device->cdev->dev), 1, 1,
8 * sizeof(long));
debug_register_view(device->debug_area, &debug_sprintf_view);
debug_set_level(device->debug_area, DBF_WARNING);
@@ -933,7 +933,7 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
MESSAGE(KERN_DEBUG,
"invalid status in handle_killed_request: "
"bus_id %s, status %02x",
- cdev->dev.bus_id, cqr->status);
+ dev_name(&cdev->dev), cqr->status);
return;
}
@@ -942,7 +942,7 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
device != dasd_device_from_cdev_locked(cdev) ||
strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
- cdev->dev.bus_id);
+ dev_name(&cdev->dev));
return;
}
@@ -982,11 +982,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
break;
case -ETIMEDOUT:
printk(KERN_WARNING"%s(%s): request timed out\n",
- __func__, cdev->dev.bus_id);
+ __func__, dev_name(&cdev->dev));
break;
default:
printk(KERN_WARNING"%s(%s): unknown error %ld\n",
- __func__, cdev->dev.bus_id, PTR_ERR(irb));
+ __func__, dev_name(&cdev->dev), PTR_ERR(irb));
}
dasd_handle_killed_request(cdev, intparm);
return;
@@ -995,7 +995,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
now = get_clock();
DBF_EVENT(DBF_ERR, "Interrupt: bus_id %s CS/DS %04x ip %08x",
- cdev->dev.bus_id, ((irb->scsw.cmd.cstat << 8) |
+ dev_name(&cdev->dev), ((irb->scsw.cmd.cstat << 8) |
irb->scsw.cmd.dstat), (unsigned int) intparm);
/* check for unsolicited interrupts */
@@ -1019,7 +1019,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
if (!device ||
strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
- cdev->dev.bus_id);
+ dev_name(&cdev->dev));
return;
}
@@ -1037,7 +1037,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
if (cqr->status != DASD_CQR_IN_IO) {
MESSAGE(KERN_DEBUG,
"invalid status: bus_id %s, status %02x",
- cdev->dev.bus_id, cqr->status);
+ dev_name(&cdev->dev), cqr->status);
return;
}
DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p",
@@ -2134,14 +2134,14 @@ int dasd_generic_probe(struct ccw_device *cdev,
if (ret) {
printk(KERN_WARNING
"dasd_generic_probe: could not set ccw-device options "
- "for %s\n", cdev->dev.bus_id);
+ "for %s\n", dev_name(&cdev->dev));
return ret;
}
ret = dasd_add_sysfs_files(cdev);
if (ret) {
printk(KERN_WARNING
"dasd_generic_probe: could not add sysfs entries "
- "for %s\n", cdev->dev.bus_id);
+ "for %s\n", dev_name(&cdev->dev));
return ret;
}
cdev->handler = &dasd_int_handler;
@@ -2152,13 +2152,13 @@ int dasd_generic_probe(struct ccw_device *cdev,
* initial probe.
*/
if ((dasd_get_feature(cdev, DASD_FEATURE_INITIAL_ONLINE) > 0 ) ||
- (dasd_autodetect && dasd_busid_known(cdev->dev.bus_id) != 0))
+ (dasd_autodetect && dasd_busid_known(dev_name(&cdev->dev)) != 0))
ret = ccw_device_set_online(cdev);
if (ret)
printk(KERN_WARNING
"dasd_generic_probe: could not initially "
"online ccw-device %s; return code: %d\n",
- cdev->dev.bus_id, ret);
+ dev_name(&cdev->dev), ret);
return 0;
}
@@ -2224,7 +2224,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
printk (KERN_WARNING
"dasd_generic couldn't online device %s "
"- discipline DIAG not available\n",
- cdev->dev.bus_id);
+ dev_name(&cdev->dev));
dasd_delete_device(device);
return -ENODEV;
}
@@ -2248,7 +2248,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
printk (KERN_WARNING
"dasd_generic couldn't online device %s "
"with discipline %s rc=%i\n",
- cdev->dev.bus_id, discipline->name, rc);
+ dev_name(&cdev->dev), discipline->name, rc);
module_put(discipline->owner);
module_put(base_discipline->owner);
dasd_delete_device(device);
@@ -2259,7 +2259,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
if (device->state <= DASD_STATE_KNOWN) {
printk (KERN_WARNING
"dasd_generic discipline not found for %s\n",
- cdev->dev.bus_id);
+ dev_name(&cdev->dev));
rc = -ENODEV;
dasd_set_target_state(device, DASD_STATE_NEW);
if (device->block)
@@ -2267,7 +2267,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
dasd_delete_device(device);
} else
pr_debug("dasd_generic device %s found\n",
- cdev->dev.bus_id);
+ dev_name(&cdev->dev));
/* FIXME: we have to wait for the root device but we don't want
* to wait for each single device but for all at once. */
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 5c6e6f331cb0..b8f9c00633f3 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -1397,7 +1397,7 @@ static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
DEV_MESSAGE(KERN_ERR, cqr->startdev,
"ERP on alias device for request %p,"
" recover on base device %s", cqr,
- cqr->block->base->cdev->dev.bus_id);
+ dev_name(&cqr->block->base->cdev->dev));
}
dasd_eckd_reset_ccw_to_base_io(cqr);
erp->startdev = cqr->block->base;
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index cd3335c1c307..921443b01d16 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -515,9 +515,9 @@ dasd_devmap_from_cdev(struct ccw_device *cdev)
{
struct dasd_devmap *devmap;
- devmap = dasd_find_busid(cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&cdev->dev));
if (IS_ERR(devmap))
- devmap = dasd_add_busid(cdev->dev.bus_id,
+ devmap = dasd_add_busid(dev_name(&cdev->dev),
DASD_FEATURE_DEFAULT);
return devmap;
}
@@ -584,7 +584,7 @@ dasd_delete_device(struct dasd_device *device)
unsigned long flags;
/* First remove device pointer from devmap. */
- devmap = dasd_find_busid(device->cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&device->cdev->dev));
BUG_ON(IS_ERR(devmap));
spin_lock(&dasd_devmap_lock);
if (devmap->device != device) {
@@ -674,7 +674,7 @@ dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
int ro_flag;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap))
ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0;
else
@@ -723,7 +723,7 @@ dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
int erplog;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap))
erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0;
else
@@ -770,7 +770,7 @@ dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
int use_diag;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap))
use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0;
else
@@ -876,7 +876,7 @@ dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
int alias;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
spin_lock(&dasd_devmap_lock);
if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
spin_unlock(&dasd_devmap_lock);
@@ -899,7 +899,7 @@ dasd_vendor_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
char *vendor;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
spin_lock(&dasd_devmap_lock);
if (!IS_ERR(devmap) && strlen(devmap->uid.vendor) > 0)
vendor = devmap->uid.vendor;
@@ -924,7 +924,7 @@ dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf)
char ua_string[3];
struct dasd_uid *uid;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
spin_lock(&dasd_devmap_lock);
if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
spin_unlock(&dasd_devmap_lock);
@@ -972,7 +972,7 @@ dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf)
struct dasd_devmap *devmap;
int eer_flag;
- devmap = dasd_find_busid(dev->bus_id);
+ devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap) && devmap->device)
eer_flag = dasd_eer_enabled(devmap->device);
else
@@ -1034,7 +1034,7 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid)
{
struct dasd_devmap *devmap;
- devmap = dasd_find_busid(cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&cdev->dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
spin_lock(&dasd_devmap_lock);
@@ -1057,7 +1057,7 @@ dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
{
struct dasd_devmap *devmap;
- devmap = dasd_find_busid(cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&cdev->dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
@@ -1077,7 +1077,7 @@ dasd_get_feature(struct ccw_device *cdev, int feature)
{
struct dasd_devmap *devmap;
- devmap = dasd_find_busid(cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&cdev->dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
@@ -1093,7 +1093,7 @@ dasd_set_feature(struct ccw_device *cdev, int feature, int flag)
{
struct dasd_devmap *devmap;
- devmap = dasd_find_busid(cdev->dev.bus_id);
+ devmap = dasd_find_busid(dev_name(&cdev->dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 773b3fe275b2..49f9d221e23d 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -6,6 +6,8 @@
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
+ * Author.........: Nigel Hislop <hislop_nigel@emc.com>
*
*/
@@ -84,7 +86,7 @@ dasd_eckd_probe (struct ccw_device *cdev)
if (ret) {
printk(KERN_WARNING
"dasd_eckd_probe: could not set ccw-device options "
- "for %s\n", cdev->dev.bus_id);
+ "for %s\n", dev_name(&cdev->dev));
return ret;
}
ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
@@ -1501,12 +1503,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
return;
}
- /* just report other unsolicited interrupts */
- DEV_MESSAGE(KERN_DEBUG, device, "%s",
- "unsolicited interrupt received");
- device->discipline->dump_sense(device, NULL, irb);
- dasd_schedule_device_bh(device);
+ if ((irb->scsw.cmd.cc == 1) &&
+ (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
+ (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) &&
+ (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) {
+ /* fake irb do nothing, they are handled elsewhere */
+ dasd_schedule_device_bh(device);
+ return;
+ }
+
+ if (!(irb->esw.esw0.erw.cons)) {
+ /* just report other unsolicited interrupts */
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "unsolicited interrupt received");
+ } else {
+ DEV_MESSAGE(KERN_ERR, device, "%s",
+ "unsolicited interrupt received "
+ "(sense available)");
+ device->discipline->dump_sense(device, NULL, irb);
+ }
+ dasd_schedule_device_bh(device);
return;
};
@@ -2068,6 +2085,103 @@ dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
return 0;
}
+/*
+ * Issue syscall I/O to EMC Symmetrix array.
+ * CCWs are PSF and RSSD
+ */
+static int dasd_symm_io(struct dasd_device *device, void __user *argp)
+{
+ struct dasd_symmio_parms usrparm;
+ char *psf_data, *rssd_result;
+ struct dasd_ccw_req *cqr;
+ struct ccw1 *ccw;
+ int rc;
+
+ /* Copy parms from caller */
+ rc = -EFAULT;
+ if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
+ goto out;
+#ifndef CONFIG_64BIT
+ /* Make sure pointers are sane even on 31 bit. */
+ if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
+ rc = -EINVAL;
+ goto out;
+ }
+#endif
+ /* alloc I/O data area */
+ psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
+ rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
+ if (!psf_data || !rssd_result) {
+ rc = -ENOMEM;
+ goto out_free;
+ }
+
+ /* get syscall header from user space */
+ rc = -EFAULT;
+ if (copy_from_user(psf_data,
+ (void __user *)(unsigned long) usrparm.psf_data,
+ usrparm.psf_data_len))
+ goto out_free;
+
+ /* sanity check on syscall header */
+ if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
+ rc = -EINVAL;
+ goto out_free;
+ }
+
+ /* setup CCWs for PSF + RSSD */
+ cqr = dasd_smalloc_request("ECKD", 2 , 0, device);
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate initialization request");
+ rc = PTR_ERR(cqr);
+ goto out_free;
+ }
+
+ cqr->startdev = device;
+ cqr->memdev = device;
+ cqr->retries = 3;
+ cqr->expires = 10 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+
+ /* Build the ccws */
+ ccw = cqr->cpaddr;
+
+ /* PSF ccw */
+ ccw->cmd_code = DASD_ECKD_CCW_PSF;
+ ccw->count = usrparm.psf_data_len;
+ ccw->flags |= CCW_FLAG_CC;
+ ccw->cda = (__u32)(addr_t) psf_data;
+
+ ccw++;
+
+ /* RSSD ccw */
+ ccw->cmd_code = DASD_ECKD_CCW_RSSD;
+ ccw->count = usrparm.rssd_result_len;
+ ccw->flags = CCW_FLAG_SLI ;
+ ccw->cda = (__u32)(addr_t) rssd_result;
+
+ rc = dasd_sleep_on(cqr);
+ if (rc)
+ goto out_sfree;
+
+ rc = -EFAULT;
+ if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
+ rssd_result, usrparm.rssd_result_len))
+ goto out_sfree;
+ rc = 0;
+
+out_sfree:
+ dasd_sfree_request(cqr, cqr->memdev);
+out_free:
+ kfree(rssd_result);
+ kfree(psf_data);
+out:
+ DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
+ return rc;
+}
+
static int
dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
{
@@ -2086,6 +2200,8 @@ dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
return dasd_eckd_reserve(device);
case BIODASDSLCK:
return dasd_eckd_steal_lock(device);
+ case BIODASDSYMMIO:
+ return dasd_symm_io(device, argp);
default:
return -ENOIOCTLCMD;
}
@@ -2145,13 +2261,13 @@ static void dasd_eckd_dump_sense(struct dasd_device *device,
/* dump the sense data */
len = sprintf(page, KERN_ERR PRINTK_HEADER
" I/O status report for device %s:\n",
- device->cdev->dev.bus_id);
+ dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" in req: %p CS: 0x%02X DS: 0x%02X\n", req,
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing CCW: %p\n",
- device->cdev->dev.bus_id,
+ dev_name(&device->cdev->dev),
(void *) (addr_t) irb->scsw.cmd.cpa);
if (irb->esw.esw0.erw.cons) {
for (sl = 0; sl < 4; sl++) {
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index bf512ac75b9e..892e2878d61b 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -309,7 +309,8 @@ static void dasd_eer_write_standard_trigger(struct dasd_device *device,
do_gettimeofday(&tv);
header.tv_sec = tv.tv_sec;
header.tv_usec = tv.tv_usec;
- strncpy(header.busid, device->cdev->dev.bus_id, DASD_EER_BUSID_SIZE);
+ strncpy(header.busid, dev_name(&device->cdev->dev),
+ DASD_EER_BUSID_SIZE);
spin_lock_irqsave(&bufferlock, flags);
list_for_each_entry(eerb, &bufferlist, list) {
@@ -349,7 +350,8 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device,
do_gettimeofday(&tv);
header.tv_sec = tv.tv_sec;
header.tv_usec = tv.tv_usec;
- strncpy(header.busid, device->cdev->dev.bus_id, DASD_EER_BUSID_SIZE);
+ strncpy(header.busid, dev_name(&device->cdev->dev),
+ DASD_EER_BUSID_SIZE);
spin_lock_irqsave(&bufferlock, flags);
list_for_each_entry(eerb, &bufferlist, list) {
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index aa0c533423a5..93d9b6452a94 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -451,13 +451,13 @@ dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
}
len = sprintf(page, KERN_ERR PRINTK_HEADER
" I/O status report for device %s:\n",
- device->cdev->dev.bus_id);
+ dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" in req: %p CS: 0x%02X DS: 0x%02X\n", req,
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing CCW: %p\n",
- device->cdev->dev.bus_id,
+ dev_name(&device->cdev->dev),
(void *) (addr_t) irb->scsw.cmd.cpa);
if (irb->esw.esw0.erw.cons) {
for (sl = 0; sl < 4; sl++) {
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 31ecaa4a40e4..489d5fe488fb 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -126,7 +126,7 @@ do { \
#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
do { \
printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
- d_device->cdev->dev.bus_id, d_args); \
+ dev_name(&d_device->cdev->dev), d_args); \
DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
} while(0)
@@ -140,7 +140,7 @@ do { \
#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
do { \
printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
- d_device->cdev->dev.bus_id, d_args); \
+ dev_name(&d_device->cdev->dev), d_args); \
} while(0)
#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 03c0e40a92ff..9088de84b45d 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -67,7 +67,7 @@ dasd_devices_show(struct seq_file *m, void *v)
return 0;
}
/* Print device number. */
- seq_printf(m, "%s", device->cdev->dev.bus_id);
+ seq_printf(m, "%s", dev_name(&device->cdev->dev));
/* Print discipline string. */
if (device != NULL && device->discipline != NULL)
seq_printf(m, "(%s)", device->discipline->name);
@@ -76,7 +76,8 @@ dasd_devices_show(struct seq_file *m, void *v)
/* Print kdev. */
if (block->gdp)
seq_printf(m, " at (%3d:%6d)",
- block->gdp->major, block->gdp->first_minor);
+ MAJOR(disk_devt(block->gdp)),
+ MINOR(disk_devt(block->gdp)));
else
seq_printf(m, " at (???:??????)");
/* Print device name. */
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 711b3004b3e6..a7ff167d5b81 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -31,7 +31,6 @@
#define PRINT_WARN(x...) printk(KERN_WARNING DCSSBLK_NAME " warning: " x)
#define PRINT_ERR(x...) printk(KERN_ERR DCSSBLK_NAME " error: " x)
-
static int dcssblk_open(struct inode *inode, struct file *filp);
static int dcssblk_release(struct inode *inode, struct file *filp);
static int dcssblk_make_request(struct request_queue *q, struct bio *bio);
@@ -48,6 +47,30 @@ static struct block_device_operations dcssblk_devops = {
.direct_access = dcssblk_direct_access,
};
+struct dcssblk_dev_info {
+ struct list_head lh;
+ struct device dev;
+ char segment_name[BUS_ID_SIZE];
+ atomic_t use_count;
+ struct gendisk *gd;
+ unsigned long start;
+ unsigned long end;
+ int segment_type;
+ unsigned char save_pending;
+ unsigned char is_shared;
+ struct request_queue *dcssblk_queue;
+ int num_of_segments;
+ struct list_head seg_list;
+};
+
+struct segment_info {
+ struct list_head lh;
+ char segment_name[BUS_ID_SIZE];
+ unsigned long start;
+ unsigned long end;
+ int segment_type;
+};
+
static ssize_t dcssblk_add_store(struct device * dev, struct device_attribute *attr, const char * buf,
size_t count);
static ssize_t dcssblk_remove_store(struct device * dev, struct device_attribute *attr, const char * buf,
@@ -58,30 +81,20 @@ static ssize_t dcssblk_save_show(struct device *dev, struct device_attribute *at
static ssize_t dcssblk_shared_store(struct device * dev, struct device_attribute *attr, const char * buf,
size_t count);
static ssize_t dcssblk_shared_show(struct device *dev, struct device_attribute *attr, char *buf);
+static ssize_t dcssblk_seglist_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
static DEVICE_ATTR(add, S_IWUSR, NULL, dcssblk_add_store);
static DEVICE_ATTR(remove, S_IWUSR, NULL, dcssblk_remove_store);
-static DEVICE_ATTR(save, S_IWUSR | S_IRUGO, dcssblk_save_show,
+static DEVICE_ATTR(save, S_IWUSR | S_IRUSR, dcssblk_save_show,
dcssblk_save_store);
-static DEVICE_ATTR(shared, S_IWUSR | S_IRUGO, dcssblk_shared_show,
+static DEVICE_ATTR(shared, S_IWUSR | S_IRUSR, dcssblk_shared_show,
dcssblk_shared_store);
+static DEVICE_ATTR(seglist, S_IRUSR, dcssblk_seglist_show, NULL);
static struct device *dcssblk_root_dev;
-struct dcssblk_dev_info {
- struct list_head lh;
- struct device dev;
- char segment_name[BUS_ID_SIZE];
- atomic_t use_count;
- struct gendisk *gd;
- unsigned long start;
- unsigned long end;
- int segment_type;
- unsigned char save_pending;
- unsigned char is_shared;
- struct request_queue *dcssblk_queue;
-};
-
static LIST_HEAD(dcssblk_devices);
static struct rw_semaphore dcssblk_devices_sem;
@@ -91,8 +104,15 @@ static struct rw_semaphore dcssblk_devices_sem;
static void
dcssblk_release_segment(struct device *dev)
{
- PRINT_DEBUG("segment release fn called for %s\n", dev->bus_id);
- kfree(container_of(dev, struct dcssblk_dev_info, dev));
+ struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry, *temp;
+
+ dev_info = container_of(dev, struct dcssblk_dev_info, dev);
+ list_for_each_entry_safe(entry, temp, &dev_info->seg_list, lh) {
+ list_del(&entry->lh);
+ kfree(entry);
+ }
+ kfree(dev_info);
module_put(THIS_MODULE);
}
@@ -114,7 +134,7 @@ dcssblk_assign_free_minor(struct dcssblk_dev_info *dev_info)
found = 0;
// test if minor available
list_for_each_entry(entry, &dcssblk_devices, lh)
- if (minor == entry->gd->first_minor)
+ if (minor == MINOR(disk_devt(entry->gd)))
found++;
if (!found) break; // got unused minor
}
@@ -142,6 +162,169 @@ dcssblk_get_device_by_name(char *name)
return NULL;
}
+/*
+ * get the struct segment_info from seg_list
+ * for the given name.
+ * down_read(&dcssblk_devices_sem) must be held.
+ */
+static struct segment_info *
+dcssblk_get_segment_by_name(char *name)
+{
+ struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry;
+
+ list_for_each_entry(dev_info, &dcssblk_devices, lh) {
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ if (!strcmp(name, entry->segment_name))
+ return entry;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * get the highest address of the multi-segment block.
+ */
+static unsigned long
+dcssblk_find_highest_addr(struct dcssblk_dev_info *dev_info)
+{
+ unsigned long highest_addr;
+ struct segment_info *entry;
+
+ highest_addr = 0;
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ if (highest_addr < entry->end)
+ highest_addr = entry->end;
+ }
+ return highest_addr;
+}
+
+/*
+ * get the lowest address of the multi-segment block.
+ */
+static unsigned long
+dcssblk_find_lowest_addr(struct dcssblk_dev_info *dev_info)
+{
+ int set_first;
+ unsigned long lowest_addr;
+ struct segment_info *entry;
+
+ set_first = 0;
+ lowest_addr = 0;
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ if (set_first == 0) {
+ lowest_addr = entry->start;
+ set_first = 1;
+ } else {
+ if (lowest_addr > entry->start)
+ lowest_addr = entry->start;
+ }
+ }
+ return lowest_addr;
+}
+
+/*
+ * Check continuity of segments.
+ */
+static int
+dcssblk_is_continuous(struct dcssblk_dev_info *dev_info)
+{
+ int i, j, rc;
+ struct segment_info *sort_list, *entry, temp;
+
+ if (dev_info->num_of_segments <= 1)
+ return 0;
+
+ sort_list = kzalloc(
+ sizeof(struct segment_info) * dev_info->num_of_segments,
+ GFP_KERNEL);
+ if (sort_list == NULL)
+ return -ENOMEM;
+ i = 0;
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ memcpy(&sort_list[i], entry, sizeof(struct segment_info));
+ i++;
+ }
+
+ /* sort segments */
+ for (i = 0; i < dev_info->num_of_segments; i++)
+ for (j = 0; j < dev_info->num_of_segments; j++)
+ if (sort_list[j].start > sort_list[i].start) {
+ memcpy(&temp, &sort_list[i],
+ sizeof(struct segment_info));
+ memcpy(&sort_list[i], &sort_list[j],
+ sizeof(struct segment_info));
+ memcpy(&sort_list[j], &temp,
+ sizeof(struct segment_info));
+ }
+
+ /* check continuity */
+ for (i = 0; i < dev_info->num_of_segments - 1; i++) {
+ if ((sort_list[i].end + 1) != sort_list[i+1].start) {
+ PRINT_ERR("Segment %s is not contiguous with "
+ "segment %s\n",
+ sort_list[i].segment_name,
+ sort_list[i+1].segment_name);
+ rc = -EINVAL;
+ goto out;
+ }
+ /* EN and EW are allowed in a block device */
+ if (sort_list[i].segment_type != sort_list[i+1].segment_type) {
+ if (!(sort_list[i].segment_type & SEGMENT_EXCLUSIVE) ||
+ (sort_list[i].segment_type == SEG_TYPE_ER) ||
+ !(sort_list[i+1].segment_type &
+ SEGMENT_EXCLUSIVE) ||
+ (sort_list[i+1].segment_type == SEG_TYPE_ER)) {
+ PRINT_ERR("Segment %s has different type from "
+ "segment %s\n",
+ sort_list[i].segment_name,
+ sort_list[i+1].segment_name);
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+ }
+ rc = 0;
+out:
+ kfree(sort_list);
+ return rc;
+}
+
+/*
+ * Load a segment
+ */
+static int
+dcssblk_load_segment(char *name, struct segment_info **seg_info)
+{
+ int rc;
+
+ /* already loaded? */
+ down_read(&dcssblk_devices_sem);
+ *seg_info = dcssblk_get_segment_by_name(name);
+ up_read(&dcssblk_devices_sem);
+ if (*seg_info != NULL)
+ return -EEXIST;
+
+ /* get a struct segment_info */
+ *seg_info = kzalloc(sizeof(struct segment_info), GFP_KERNEL);
+ if (*seg_info == NULL)
+ return -ENOMEM;
+
+ strcpy((*seg_info)->segment_name, name);
+
+ /* load the segment */
+ rc = segment_load(name, SEGMENT_SHARED,
+ &(*seg_info)->start, &(*seg_info)->end);
+ if (rc < 0) {
+ segment_warning(rc, (*seg_info)->segment_name);
+ kfree(*seg_info);
+ } else {
+ INIT_LIST_HEAD(&(*seg_info)->lh);
+ (*seg_info)->segment_type = rc;
+ }
+ return rc;
+}
+
static void dcssblk_unregister_callback(struct device *dev)
{
device_unregister(dev);
@@ -165,6 +348,7 @@ static ssize_t
dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const char *inbuf, size_t count)
{
struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry, *temp;
int rc;
if ((count > 1) && (inbuf[1] != '\n') && (inbuf[1] != '\0'))
@@ -172,46 +356,46 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
down_write(&dcssblk_devices_sem);
dev_info = container_of(dev, struct dcssblk_dev_info, dev);
if (atomic_read(&dev_info->use_count)) {
- PRINT_ERR("share: segment %s is busy!\n",
- dev_info->segment_name);
rc = -EBUSY;
goto out;
}
if (inbuf[0] == '1') {
- // reload segment in shared mode
- rc = segment_modify_shared(dev_info->segment_name,
- SEGMENT_SHARED);
- if (rc < 0) {
- BUG_ON(rc == -EINVAL);
- if (rc != -EAGAIN)
- goto removeseg;
- } else {
- dev_info->is_shared = 1;
- switch (dev_info->segment_type) {
- case SEG_TYPE_SR:
- case SEG_TYPE_ER:
- case SEG_TYPE_SC:
- set_disk_ro(dev_info->gd,1);
+ /* reload segments in shared mode */
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ rc = segment_modify_shared(entry->segment_name,
+ SEGMENT_SHARED);
+ if (rc < 0) {
+ BUG_ON(rc == -EINVAL);
+ if (rc != -EAGAIN)
+ goto removeseg;
}
}
+ dev_info->is_shared = 1;
+ switch (dev_info->segment_type) {
+ case SEG_TYPE_SR:
+ case SEG_TYPE_ER:
+ case SEG_TYPE_SC:
+ set_disk_ro(dev_info->gd, 1);
+ }
} else if (inbuf[0] == '0') {
- // reload segment in exclusive mode
+ /* reload segments in exclusive mode */
if (dev_info->segment_type == SEG_TYPE_SC) {
PRINT_ERR("Segment type SC (%s) cannot be loaded in "
- "non-shared mode\n", dev_info->segment_name);
+ "non-shared mode\n", dev_info->segment_name);
rc = -EINVAL;
goto out;
}
- rc = segment_modify_shared(dev_info->segment_name,
- SEGMENT_EXCLUSIVE);
- if (rc < 0) {
- BUG_ON(rc == -EINVAL);
- if (rc != -EAGAIN)
- goto removeseg;
- } else {
- dev_info->is_shared = 0;
- set_disk_ro(dev_info->gd, 0);
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ rc = segment_modify_shared(entry->segment_name,
+ SEGMENT_EXCLUSIVE);
+ if (rc < 0) {
+ BUG_ON(rc == -EINVAL);
+ if (rc != -EAGAIN)
+ goto removeseg;
+ }
}
+ dev_info->is_shared = 0;
+ set_disk_ro(dev_info->gd, 0);
} else {
rc = -EINVAL;
goto out;
@@ -220,8 +404,14 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
goto out;
removeseg:
- PRINT_ERR("Could not reload segment %s, removing it now!\n",
- dev_info->segment_name);
+ PRINT_ERR("Could not reload segment(s) of the device %s, removing "
+ "segment(s) now!\n",
+ dev_info->segment_name);
+ temp = entry;
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ if (entry != temp)
+ segment_unload(entry->segment_name);
+ }
list_del(&dev_info->lh);
del_gendisk(dev_info->gd);
@@ -254,6 +444,7 @@ static ssize_t
dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char *inbuf, size_t count)
{
struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry;
if ((count > 1) && (inbuf[1] != '\n') && (inbuf[1] != '\0'))
return -EINVAL;
@@ -263,14 +454,16 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
if (inbuf[0] == '1') {
if (atomic_read(&dev_info->use_count) == 0) {
// device is idle => we save immediately
- PRINT_INFO("Saving segment %s\n",
+ PRINT_INFO("Saving segment(s) of the device %s\n",
dev_info->segment_name);
- segment_save(dev_info->segment_name);
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ segment_save(entry->segment_name);
+ }
} else {
// device is busy => we save it when it becomes
// idle in dcssblk_release
- PRINT_INFO("Segment %s is currently busy, it will "
- "be saved when it becomes idle...\n",
+ PRINT_INFO("Device %s is currently busy, segment(s) "
+ "will be saved when it becomes idle...\n",
dev_info->segment_name);
dev_info->save_pending = 1;
}
@@ -279,7 +472,8 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
// device is busy & the user wants to undo his save
// request
dev_info->save_pending = 0;
- PRINT_INFO("Pending save for segment %s deactivated\n",
+ PRINT_INFO("Pending save for segment(s) of the device "
+ "%s deactivated\n",
dev_info->segment_name);
}
} else {
@@ -291,66 +485,123 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
}
/*
+ * device attribute for showing all segments in a device
+ */
+static ssize_t
+dcssblk_seglist_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int i;
+
+ struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry;
+
+ down_read(&dcssblk_devices_sem);
+ dev_info = container_of(dev, struct dcssblk_dev_info, dev);
+ i = 0;
+ buf[0] = '\0';
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ strcpy(&buf[i], entry->segment_name);
+ i += strlen(entry->segment_name);
+ buf[i] = '\n';
+ i++;
+ }
+ up_read(&dcssblk_devices_sem);
+ return i;
+}
+
+/*
* device attribute for adding devices
*/
static ssize_t
dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
- int rc, i;
+ int rc, i, j, num_of_segments;
struct dcssblk_dev_info *dev_info;
+ struct segment_info *seg_info, *temp;
char *local_buf;
unsigned long seg_byte_size;
dev_info = NULL;
+ seg_info = NULL;
if (dev != dcssblk_root_dev) {
rc = -EINVAL;
goto out_nobuf;
}
+ if ((count < 1) || (buf[0] == '\0') || (buf[0] == '\n')) {
+ rc = -ENAMETOOLONG;
+ goto out_nobuf;
+ }
+
local_buf = kmalloc(count + 1, GFP_KERNEL);
if (local_buf == NULL) {
rc = -ENOMEM;
goto out_nobuf;
}
+
/*
* parse input
*/
+ num_of_segments = 0;
for (i = 0; ((buf[i] != '\0') && (buf[i] != '\n') && i < count); i++) {
- local_buf[i] = toupper(buf[i]);
+ for (j = i; (buf[j] != ':') &&
+ (buf[j] != '\0') &&
+ (buf[j] != '\n') &&
+ j < count; j++) {
+ local_buf[j-i] = toupper(buf[j]);
+ }
+ local_buf[j-i] = '\0';
+ if (((j - i) == 0) || ((j - i) > 8)) {
+ rc = -ENAMETOOLONG;
+ goto seg_list_del;
+ }
+
+ rc = dcssblk_load_segment(local_buf, &seg_info);
+ if (rc < 0)
+ goto seg_list_del;
+ /*
+ * get a struct dcssblk_dev_info
+ */
+ if (num_of_segments == 0) {
+ dev_info = kzalloc(sizeof(struct dcssblk_dev_info),
+ GFP_KERNEL);
+ if (dev_info == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ strcpy(dev_info->segment_name, local_buf);
+ dev_info->segment_type = seg_info->segment_type;
+ INIT_LIST_HEAD(&dev_info->seg_list);
+ }
+ list_add_tail(&seg_info->lh, &dev_info->seg_list);
+ num_of_segments++;
+ i = j;
+
+ if ((buf[j] == '\0') || (buf[j] == '\n'))
+ break;
}
- local_buf[i] = '\0';
- if ((i == 0) || (i > 8)) {
+
+ /* no trailing colon at the end of the input */
+ if ((i > 0) && (buf[i-1] == ':')) {
rc = -ENAMETOOLONG;
- goto out;
- }
- /*
- * already loaded?
- */
- down_read(&dcssblk_devices_sem);
- dev_info = dcssblk_get_device_by_name(local_buf);
- up_read(&dcssblk_devices_sem);
- if (dev_info != NULL) {
- PRINT_WARN("Segment %s already loaded!\n", local_buf);
- rc = -EEXIST;
- goto out;
- }
- /*
- * get a struct dcssblk_dev_info
- */
- dev_info = kzalloc(sizeof(struct dcssblk_dev_info), GFP_KERNEL);
- if (dev_info == NULL) {
- rc = -ENOMEM;
- goto out;
+ goto seg_list_del;
}
+ strlcpy(local_buf, buf, i + 1);
+ dev_info->num_of_segments = num_of_segments;
+ rc = dcssblk_is_continuous(dev_info);
+ if (rc < 0)
+ goto seg_list_del;
+
+ dev_info->start = dcssblk_find_lowest_addr(dev_info);
+ dev_info->end = dcssblk_find_highest_addr(dev_info);
- strcpy(dev_info->segment_name, local_buf);
- strlcpy(dev_info->dev.bus_id, local_buf, BUS_ID_SIZE);
+ dev_set_name(&dev_info->dev, dev_info->segment_name);
dev_info->dev.release = dcssblk_release_segment;
INIT_LIST_HEAD(&dev_info->lh);
-
dev_info->gd = alloc_disk(DCSSBLK_MINORS_PER_DISK);
if (dev_info->gd == NULL) {
rc = -ENOMEM;
- goto free_dev_info;
+ goto seg_list_del;
}
dev_info->gd->major = dcssblk_major;
dev_info->gd->fops = &dcssblk_devops;
@@ -360,59 +611,43 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
dev_info->gd->driverfs_dev = &dev_info->dev;
blk_queue_make_request(dev_info->dcssblk_queue, dcssblk_make_request);
blk_queue_hardsect_size(dev_info->dcssblk_queue, 4096);
- /*
- * load the segment
- */
- rc = segment_load(local_buf, SEGMENT_SHARED,
- &dev_info->start, &dev_info->end);
- if (rc < 0) {
- segment_warning(rc, dev_info->segment_name);
- goto dealloc_gendisk;
- }
+
seg_byte_size = (dev_info->end - dev_info->start + 1);
set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors
- PRINT_INFO("Loaded segment %s, size = %lu Byte, "
+ PRINT_INFO("Loaded segment(s) %s, size = %lu Byte, "
"capacity = %lu (512 Byte) sectors\n", local_buf,
seg_byte_size, seg_byte_size >> 9);
- dev_info->segment_type = rc;
dev_info->save_pending = 0;
dev_info->is_shared = 1;
dev_info->dev.parent = dcssblk_root_dev;
/*
- * get minor, add to list
+ *get minor, add to list
*/
down_write(&dcssblk_devices_sem);
- if (dcssblk_get_device_by_name(local_buf)) {
- up_write(&dcssblk_devices_sem);
+ if (dcssblk_get_segment_by_name(local_buf)) {
rc = -EEXIST;
- goto unload_seg;
+ goto release_gd;
}
rc = dcssblk_assign_free_minor(dev_info);
- if (rc) {
- up_write(&dcssblk_devices_sem);
- PRINT_ERR("No free minor number available! "
- "Unloading segment...\n");
- goto unload_seg;
- }
+ if (rc)
+ goto release_gd;
sprintf(dev_info->gd->disk_name, "dcssblk%d",
- dev_info->gd->first_minor);
+ MINOR(disk_devt(dev_info->gd)));
list_add_tail(&dev_info->lh, &dcssblk_devices);
if (!try_module_get(THIS_MODULE)) {
rc = -ENODEV;
- goto list_del;
+ goto dev_list_del;
}
/*
* register the device
*/
rc = device_register(&dev_info->dev);
if (rc) {
- PRINT_ERR("Segment %s could not be registered RC=%d\n",
- local_buf, rc);
module_put(THIS_MODULE);
- goto list_del;
+ goto dev_list_del;
}
get_device(&dev_info->dev);
rc = device_create_file(&dev_info->dev, &dev_attr_shared);
@@ -421,6 +656,9 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
rc = device_create_file(&dev_info->dev, &dev_attr_save);
if (rc)
goto unregister_dev;
+ rc = device_create_file(&dev_info->dev, &dev_attr_seglist);
+ if (rc)
+ goto unregister_dev;
add_disk(dev_info->gd);
@@ -434,7 +672,6 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
set_disk_ro(dev_info->gd,0);
break;
}
- PRINT_DEBUG("Segment %s loaded successfully\n", local_buf);
up_write(&dcssblk_devices_sem);
rc = count;
goto out;
@@ -445,20 +682,27 @@ unregister_dev:
dev_info->gd->queue = NULL;
put_disk(dev_info->gd);
device_unregister(&dev_info->dev);
- segment_unload(dev_info->segment_name);
+ list_for_each_entry(seg_info, &dev_info->seg_list, lh) {
+ segment_unload(seg_info->segment_name);
+ }
put_device(&dev_info->dev);
up_write(&dcssblk_devices_sem);
goto out;
-list_del:
+dev_list_del:
list_del(&dev_info->lh);
- up_write(&dcssblk_devices_sem);
-unload_seg:
- segment_unload(local_buf);
-dealloc_gendisk:
+release_gd:
blk_cleanup_queue(dev_info->dcssblk_queue);
dev_info->gd->queue = NULL;
put_disk(dev_info->gd);
-free_dev_info:
+ up_write(&dcssblk_devices_sem);
+seg_list_del:
+ if (dev_info == NULL)
+ goto out;
+ list_for_each_entry_safe(seg_info, temp, &dev_info->seg_list, lh) {
+ list_del(&seg_info->lh);
+ segment_unload(seg_info->segment_name);
+ kfree(seg_info);
+ }
kfree(dev_info);
out:
kfree(local_buf);
@@ -473,6 +717,7 @@ static ssize_t
dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry;
int rc, i;
char *local_buf;
@@ -499,26 +744,28 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
dev_info = dcssblk_get_device_by_name(local_buf);
if (dev_info == NULL) {
up_write(&dcssblk_devices_sem);
- PRINT_WARN("Segment %s is not loaded!\n", local_buf);
+ PRINT_WARN("Device %s is not loaded!\n", local_buf);
rc = -ENODEV;
goto out_buf;
}
if (atomic_read(&dev_info->use_count) != 0) {
up_write(&dcssblk_devices_sem);
- PRINT_WARN("Segment %s is in use!\n", local_buf);
+ PRINT_WARN("Device %s is in use!\n", local_buf);
rc = -EBUSY;
goto out_buf;
}
- list_del(&dev_info->lh);
+ list_del(&dev_info->lh);
del_gendisk(dev_info->gd);
blk_cleanup_queue(dev_info->dcssblk_queue);
dev_info->gd->queue = NULL;
put_disk(dev_info->gd);
device_unregister(&dev_info->dev);
- segment_unload(dev_info->segment_name);
- PRINT_DEBUG("Segment %s unloaded successfully\n",
- dev_info->segment_name);
+
+ /* unload all related segments */
+ list_for_each_entry(entry, &dev_info->seg_list, lh)
+ segment_unload(entry->segment_name);
+
put_device(&dev_info->dev);
up_write(&dcssblk_devices_sem);
@@ -550,6 +797,7 @@ static int
dcssblk_release(struct inode *inode, struct file *filp)
{
struct dcssblk_dev_info *dev_info;
+ struct segment_info *entry;
int rc;
dev_info = inode->i_bdev->bd_disk->private_data;
@@ -560,9 +808,11 @@ dcssblk_release(struct inode *inode, struct file *filp)
down_write(&dcssblk_devices_sem);
if (atomic_dec_and_test(&dev_info->use_count)
&& (dev_info->save_pending)) {
- PRINT_INFO("Segment %s became idle and is being saved now\n",
+ PRINT_INFO("Device %s became idle and is being saved now\n",
dev_info->segment_name);
- segment_save(dev_info->segment_name);
+ list_for_each_entry(entry, &dev_info->seg_list, lh) {
+ segment_save(entry->segment_name);
+ }
dev_info->save_pending = 0;
}
up_write(&dcssblk_devices_sem);
@@ -602,7 +852,8 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
case SEG_TYPE_SC:
/* cannot write to these segments */
if (bio_data_dir(bio) == WRITE) {
- PRINT_WARN("rejecting write to ro segment %s\n", dev_info->dev.bus_id);
+ PRINT_WARN("rejecting write to ro device %s\n",
+ dev_name(&dev_info->dev));
goto fail;
}
}
@@ -657,7 +908,7 @@ static void
dcssblk_check_params(void)
{
int rc, i, j, k;
- char buf[9];
+ char buf[DCSSBLK_PARM_LEN + 1];
struct dcssblk_dev_info *dev_info;
for (i = 0; (i < DCSSBLK_PARM_LEN) && (dcssblk_segments[i] != '\0');
@@ -665,15 +916,16 @@ dcssblk_check_params(void)
for (j = i; (dcssblk_segments[j] != ',') &&
(dcssblk_segments[j] != '\0') &&
(dcssblk_segments[j] != '(') &&
- (j - i) < 8; j++)
+ (j < DCSSBLK_PARM_LEN); j++)
{
buf[j-i] = dcssblk_segments[j];
}
buf[j-i] = '\0';
rc = dcssblk_add_store(dcssblk_root_dev, NULL, buf, j-i);
if ((rc >= 0) && (dcssblk_segments[j] == '(')) {
- for (k = 0; buf[k] != '\0'; k++)
+ for (k = 0; (buf[k] != ':') && (buf[k] != '\0'); k++)
buf[k] = toupper(buf[k]);
+ buf[k] = '\0';
if (!strncmp(&dcssblk_segments[j], "(local)", 7)) {
down_read(&dcssblk_devices_sem);
dev_info = dcssblk_get_device_by_name(buf);
@@ -740,10 +992,12 @@ module_exit(dcssblk_exit);
module_param_string(segments, dcssblk_segments, DCSSBLK_PARM_LEN, 0444);
MODULE_PARM_DESC(segments, "Name of DCSS segment(s) to be loaded, "
- "comma-separated list, each name max. 8 chars.\n"
- "Adding \"(local)\" to segment name equals echoing 0 to "
- "/sys/devices/dcssblk/<segment name>/shared after loading "
- "the segment - \n"
- "e.g. segments=\"mydcss1,mydcss2,mydcss3(local)\"");
+ "comma-separated list, names in each set separated "
+ "by commas are separated by colons, each set contains "
+ "names of contiguous segments and each name max. 8 chars.\n"
+ "Adding \"(local)\" to the end of each set equals echoing 0 "
+ "to /sys/devices/dcssblk/<device name>/shared after loading "
+ "the contiguous segments - \n"
+ "e.g. segments=\"mydcss1,mydcss2:mydcss3,mydcss4(local)\"");
MODULE_LICENSE("GPL");
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index dd9b986389a2..03916989ed2d 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -56,6 +56,7 @@ typedef struct {
static xpram_device_t xpram_devices[XPRAM_MAX_DEVS];
static unsigned int xpram_sizes[XPRAM_MAX_DEVS];
static struct gendisk *xpram_disks[XPRAM_MAX_DEVS];
+static struct request_queue *xpram_queues[XPRAM_MAX_DEVS];
static unsigned int xpram_pages;
static int xpram_devs;
@@ -330,18 +331,22 @@ static int __init xpram_setup_sizes(unsigned long pages)
return 0;
}
-static struct request_queue *xpram_queue;
-
static int __init xpram_setup_blkdev(void)
{
unsigned long offset;
int i, rc = -ENOMEM;
for (i = 0; i < xpram_devs; i++) {
- struct gendisk *disk = alloc_disk(1);
- if (!disk)
+ xpram_disks[i] = alloc_disk(1);
+ if (!xpram_disks[i])
+ goto out;
+ xpram_queues[i] = blk_alloc_queue(GFP_KERNEL);
+ if (!xpram_queues[i]) {
+ put_disk(xpram_disks[i]);
goto out;
- xpram_disks[i] = disk;
+ }
+ blk_queue_make_request(xpram_queues[i], xpram_make_request);
+ blk_queue_hardsect_size(xpram_queues[i], 4096);
}
/*
@@ -352,18 +357,6 @@ static int __init xpram_setup_blkdev(void)
goto out;
/*
- * Assign the other needed values: make request function, sizes and
- * hardsect size. All the minor devices feature the same value.
- */
- xpram_queue = blk_alloc_queue(GFP_KERNEL);
- if (!xpram_queue) {
- rc = -ENOMEM;
- goto out_unreg;
- }
- blk_queue_make_request(xpram_queue, xpram_make_request);
- blk_queue_hardsect_size(xpram_queue, 4096);
-
- /*
* Setup device structures.
*/
offset = 0;
@@ -377,18 +370,18 @@ static int __init xpram_setup_blkdev(void)
disk->first_minor = i;
disk->fops = &xpram_devops;
disk->private_data = &xpram_devices[i];
- disk->queue = xpram_queue;
+ disk->queue = xpram_queues[i];
sprintf(disk->disk_name, "slram%d", i);
set_capacity(disk, xpram_sizes[i] << 1);
add_disk(disk);
}
return 0;
-out_unreg:
- unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
out:
- while (i--)
+ while (i--) {
+ blk_cleanup_queue(xpram_queues[i]);
put_disk(xpram_disks[i]);
+ }
return rc;
}
@@ -400,10 +393,10 @@ static void __exit xpram_exit(void)
int i;
for (i = 0; i < xpram_devs; i++) {
del_gendisk(xpram_disks[i]);
+ blk_cleanup_queue(xpram_queues[i]);
put_disk(xpram_disks[i]);
}
unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
- blk_cleanup_queue(xpram_queue);
}
static int __init xpram_init(void)
generated by cgit (git 2.34.1) at 2024-06-16 22:02:10 +0000