s390 patches for 4.6-rc2

index b8045b9..d750cc0 100644
@@ -669,11 +669,13 @@ static const struct file_operations prng_tdes_fops = {
 static struct miscdevice prng_sha512_dev = {
 	.name	= "prandom",
 	.minor	= MISC_DYNAMIC_MINOR,
+	.mode	= 0644,
 	.fops	= &prng_sha512_fops,
 };
 static struct miscdevice prng_tdes_dev = {
 	.name	= "prandom",
 	.minor	= MISC_DYNAMIC_MINOR,
+	.mode	= 0644,
 	.fops	= &prng_tdes_fops,
 };
 

index 4d7ccac..22da3b3 100644
@@ -15,4 +15,7 @@
 
 #define __read_mostly __attribute__((__section__(".data..read_mostly")))
 
+/* Read-only memory is marked before mark_rodata_ro() is called. */
+#define __ro_after_init __read_mostly
+
 #endif

index ab3aa68..4384bc7 100644
@@ -311,7 +311,9 @@
 #define __NR_shutdown		373
 #define __NR_mlock2		374
 #define __NR_copy_file_range	375
-#define NR_syscalls 376
+#define __NR_preadv2		376
+#define __NR_pwritev2		377
+#define NR_syscalls 378
 
 /* 
  * There are some system calls that are not present on 64 bit, some

index 58bf457..62f066b 100644
@@ -670,6 +670,7 @@ static int cpumf_pmu_notifier(struct notifier_block *self, unsigned long action,
 
 	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
+	case CPU_DOWN_FAILED:
 		flags = PMC_INIT;
 		smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
 		break;

index 1a43474..eaab9a7 100644
@@ -1521,7 +1521,7 @@ static int cpumf_pmu_notifier(struct notifier_block *self,
 
 	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
+	case CPU_DOWN_FAILED:
 		flags = PMC_INIT;
 		smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
 		break;

index 13dab0c..3776aca 100644
@@ -20,9 +20,9 @@
 static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
 		unsigned long end, int write, struct page **pages, int *nr)
 {
+	struct page *head, *page;
 	unsigned long mask;
 	pte_t *ptep, pte;
-	struct page *page;
 
 	mask = (write ? _PAGE_PROTECT : 0) | _PAGE_INVALID | _PAGE_SPECIAL;
 

@@ -37,12 +37,14 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
 			return 0;
 		VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
 		page = pte_page(pte);
-		if (!page_cache_get_speculative(page))
+		head = compound_head(page);
+		if (!page_cache_get_speculative(head))
 			return 0;
 		if (unlikely(pte_val(pte) != pte_val(*ptep))) {
-			put_page(page);
+			put_page(head);
 			return 0;
 		}
+		VM_BUG_ON_PAGE(compound_head(page) != head, page);
 		pages[*nr] = page;
 		(*nr)++;
 

index 73e2903..c7b0451 100644
@@ -108,6 +108,13 @@ void __init paging_init(void)
 	free_area_init_nodes(max_zone_pfns);
 }
 
+void mark_rodata_ro(void)
+{
+	/* Text and rodata are already protected. Nothing to do here. */
+	pr_info("Write protecting the kernel read-only data: %luk\n",
+		((unsigned long)&_eshared - (unsigned long)&_stext) >> 10);
+}
+
 void __init mem_init(void)
 {
 	if (MACHINE_HAS_TLB_LC)

@@ -126,9 +133,6 @@ void __init mem_init(void)
 	setup_zero_pages();	/* Setup zeroed pages. */
 
 	mem_init_print_info(NULL);
-	printk("Write protected kernel read-only data: %#lx - %#lx\n",
-	       (unsigned long)&_stext,
-	       PFN_ALIGN((unsigned long)&_eshared) - 1);
 }
 
 void free_initmem(void)

index 21591dd..1a4512c 100644
@@ -176,8 +176,7 @@ static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
 		rc = clp_store_query_pci_fn(zdev, &rrb->response);
 		if (rc)
 			goto out;
-		if (rrb->response.pfgid)
-			rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
+		rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
 	} else {
 		zpci_err("Q PCI FN:\n");
 		zpci_err_clp(rrb->response.hdr.rsp, rc);

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index 2f18f61..3cdbce4 100644
@@ -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,
 };

244 lines not on this page · raw message

index f8f91ee..862ee42 100644
@@ -53,6 +53,7 @@
  */
 #define PSF_ORDER_PRSSD			 0x18
 #define PSF_ORDER_CUIR_RESPONSE		 0x1A
+#define PSF_SUBORDER_QHA		 0x1C
 #define PSF_ORDER_SSC			 0x1D
 
 /*

@@ -81,6 +82,8 @@
 #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 +406,41 @@ 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));

@@ -525,6 +556,7 @@ struct dasd_eckd_private {
 	int count;
 
 	u32 fcx_max_data;
+	char suc_reason;
 };
 
 

@@ -534,7 +566,7 @@ void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 int dasd_alias_add_device(struct dasd_device *);
 int dasd_alias_remove_device(struct dasd_device *);
 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
-void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
+void dasd_alias_handle_summary_unit_check(struct work_struct *);
 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 void dasd_alias_lcu_setup_complete(struct dasd_device *);
 void dasd_alias_wait_for_lcu_setup(struct dasd_device *);

index 8de29be..6132733 100644
@@ -365,6 +365,8 @@ 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;

@@ -470,6 +472,7 @@ struct dasd_device {
 	struct work_struct restore_device;
 	struct work_struct reload_device;
 	struct work_struct kick_validate;
+	struct work_struct suc_work;
 	struct timer_list timer;
 
 	debug_info_t *debug_area;

@@ -486,6 +489,7 @@ struct dasd_device {
 	unsigned long blk_timeout;
 
 	struct dentry *debugfs_dentry;
+	struct dentry *hosts_dentry;
 	struct dasd_profile profile;
 };
 

@@ -542,6 +546,7 @@ struct dasd_attention_data {
 #define DASD_FLAG_SAFE_OFFLINE_RUNNING	11	/* safe offline running */
 #define DASD_FLAG_ABORTALL	12	/* Abort all noretry requests */
 #define DASD_FLAG_PATH_VERIFY	13	/* Path verification worker running */
+#define DASD_FLAG_SUC		14	/* unhandled summary unit check */
 
 #define DASD_SLEEPON_START_TAG	((void *) 1)
 #define DASD_SLEEPON_END_TAG	((void *) 2)

index b8045b9..d750cc0 100644
@@ -669,11 +669,13 @@ static const struct file_operations prng_tdes_fops = {
 static struct miscdevice prng_sha512_dev = {
 	.name	= "prandom",
 	.minor	= MISC_DYNAMIC_MINOR,
+	.mode	= 0644,
 	.fops	= &prng_sha512_fops,
 };
 static struct miscdevice prng_tdes_dev = {
 	.name	= "prandom",
 	.minor	= MISC_DYNAMIC_MINOR,
+	.mode	= 0644,
 	.fops	= &prng_tdes_fops,
 };
 

index 4d7ccac..22da3b3 100644
@@ -15,4 +15,7 @@
 
 #define __read_mostly __attribute__((__section__(".data..read_mostly")))
 
+/* Read-only memory is marked before mark_rodata_ro() is called. */
+#define __ro_after_init __read_mostly
+
 #endif

index ab3aa68..4384bc7 100644
@@ -311,7 +311,9 @@
 #define __NR_shutdown		373
 #define __NR_mlock2		374
 #define __NR_copy_file_range	375
-#define NR_syscalls 376
+#define __NR_preadv2		376
+#define __NR_pwritev2		377
+#define NR_syscalls 378
 
 /* 
  * There are some system calls that are not present on 64 bit, some

index 58bf457..62f066b 100644
@@ -670,6 +670,7 @@ static int cpumf_pmu_notifier(struct notifier_block *self, unsigned long action,
 
 	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
+	case CPU_DOWN_FAILED:
 		flags = PMC_INIT;
 		smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
 		break;

index 1a43474..eaab9a7 100644
@@ -1521,7 +1521,7 @@ static int cpumf_pmu_notifier(struct notifier_block *self,
 
 	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
+	case CPU_DOWN_FAILED:
 		flags = PMC_INIT;
 		smp_call_function_single(cpu, setup_pmc_cpu, &flags, 1);
 		break;

index 13dab0c..3776aca 100644
@@ -20,9 +20,9 @@
 static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
 		unsigned long end, int write, struct page **pages, int *nr)
 {
+	struct page *head, *page;
 	unsigned long mask;
 	pte_t *ptep, pte;
-	struct page *page;
 
 	mask = (write ? _PAGE_PROTECT : 0) | _PAGE_INVALID | _PAGE_SPECIAL;
 

@@ -37,12 +37,14 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
 			return 0;
 		VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
 		page = pte_page(pte);
-		if (!page_cache_get_speculative(page))
+		head = compound_head(page);
+		if (!page_cache_get_speculative(head))
 			return 0;
 		if (unlikely(pte_val(pte) != pte_val(*ptep))) {
-			put_page(page);
+			put_page(head);
 			return 0;
 		}
+		VM_BUG_ON_PAGE(compound_head(page) != head, page);
 		pages[*nr] = page;
 		(*nr)++;
 

index 73e2903..c7b0451 100644
@@ -108,6 +108,13 @@ void __init paging_init(void)
 	free_area_init_nodes(max_zone_pfns);
 }
 
+void mark_rodata_ro(void)
+{
+	/* Text and rodata are already protected. Nothing to do here. */
+	pr_info("Write protecting the kernel read-only data: %luk\n",
+		((unsigned long)&_eshared - (unsigned long)&_stext) >> 10);
+}
+
 void __init mem_init(void)
 {
 	if (MACHINE_HAS_TLB_LC)

@@ -126,9 +133,6 @@ void __init mem_init(void)
 	setup_zero_pages();	/* Setup zeroed pages. */
 
 	mem_init_print_info(NULL);
-	printk("Write protected kernel read-only data: %#lx - %#lx\n",
-	       (unsigned long)&_stext,
-	       PFN_ALIGN((unsigned long)&_eshared) - 1);
 }
 
 void free_initmem(void)

index 21591dd..1a4512c 100644
@@ -176,8 +176,7 @@ static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
 		rc = clp_store_query_pci_fn(zdev, &rrb->response);
 		if (rc)
 			goto out;
-		if (rrb->response.pfgid)
-			rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
+		rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
 	} else {
 		zpci_err("Q PCI FN:\n");
 		zpci_err_clp(rrb->response.hdr.rsp, rc);

335 lines not on this page · raw message

index 75c032d..c1b4ae5 100644
@@ -1682,6 +1682,8 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 
 	/* setup work queue for validate server*/
 	INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
+	/* setup work queue for summary unit check */
+	INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
 
 	if (!ccw_device_is_pathgroup(device->cdev)) {
 		dev_warn(&device->cdev->dev,

@@ -2549,14 +2551,6 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
 		    device->state == DASD_STATE_ONLINE &&
 		    !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
 		    !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
-			/*
-			 * the state change could be caused by an alias
-			 * reassignment remove device from alias handling
-			 * to prevent new requests from being scheduled on
-			 * the wrong alias device
-			 */
-			dasd_alias_remove_device(device);
-
 			/* schedule worker to reload device */
 			dasd_reload_device(device);
 		}

@@ -2571,7 +2565,27 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
 	/* summary unit check */
 	if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
 	    (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
-		dasd_alias_handle_summary_unit_check(device, irb);
+		if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
+			DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+				      "eckd suc: device already notified");
+			return;
+		}
+		sense = dasd_get_sense(irb);
+		if (!sense) {
+			DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+				      "eckd suc: no reason code available");
+			clear_bit(DASD_FLAG_SUC, &device->flags);
+			return;
+
+		}
+		private->suc_reason = sense[8];
+		DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
+			      "eckd handle summary unit check: reason",
+			      private->suc_reason);
+		dasd_get_device(device);
+		if (!schedule_work(&device->suc_work))
+			dasd_put_device(device);
+
 		return;
 	}
 

@@ -4495,6 +4509,12 @@ static int dasd_eckd_reload_device(struct dasd_device *device)
 	struct dasd_uid uid;
 	unsigned long flags;
 
+	/*
+	 * remove device from alias handling to prevent new requests
+	 * from being scheduled on the wrong alias device
+	 */
+	dasd_alias_remove_device(device);
+
 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
 	old_base = private->uid.base_unit_addr;
 	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);

index f8f91ee..6d9a6d3 100644
@@ -525,6 +525,7 @@ struct dasd_eckd_private {
 	int count;
 
 	u32 fcx_max_data;
+	char suc_reason;
 };
 
 

@@ -534,7 +535,7 @@ void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 int dasd_alias_add_device(struct dasd_device *);
 int dasd_alias_remove_device(struct dasd_device *);
 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
-void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
+void dasd_alias_handle_summary_unit_check(struct work_struct *);
 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 void dasd_alias_lcu_setup_complete(struct dasd_device *);
 void dasd_alias_wait_for_lcu_setup(struct dasd_device *);

index 8de29be..0f0add9 100644
@@ -470,6 +470,7 @@ struct dasd_device {
 	struct work_struct restore_device;
 	struct work_struct reload_device;
 	struct work_struct kick_validate;
+	struct work_struct suc_work;
 	struct timer_list timer;
 
 	debug_info_t *debug_area;

@@ -542,6 +543,7 @@ struct dasd_attention_data {
 #define DASD_FLAG_SAFE_OFFLINE_RUNNING	11	/* safe offline running */
 #define DASD_FLAG_ABORTALL	12	/* Abort all noretry requests */
 #define DASD_FLAG_PATH_VERIFY	13	/* Path verification worker running */
+#define DASD_FLAG_SUC		14	/* unhandled summary unit check */
 
 #define DASD_SLEEPON_START_TAG	((void *) 1)
 #define DASD_SLEEPON_END_TAG	((void *) 2)