From: Michael Holzheu <[email protected]>
[S390] Hypervisor filesystem (s390_hypfs) for z/VM
This is an extension of the already existing hypfs for LPAR (DIAG 204).
Data returned by DIAG 2fc is exported using the s390_hypfs when Linux
is running under z/VM. Information about cpus and memory is provided.
Data is put into different virtual files which can be accessed from user
space. All values are represented as ASCII strings
Signed-off-by: Michael Holzheu <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---
arch/s390/hypfs/Makefile | 2
arch/s390/hypfs/hypfs.h | 9 +
arch/s390/hypfs/hypfs_diag.h | 16 --
arch/s390/hypfs/hypfs_vm.c | 231 +++++++++++++++++++++++++++++++++++++++++++
arch/s390/hypfs/inode.c | 31 +++--
5 files changed, 262 insertions(+), 27 deletions(-)
diff -urpN linux-2.6/arch/s390/hypfs/hypfs_diag.h linux-2.6-patched/arch/s390/hypfs/hypfs_diag.h
--- linux-2.6/arch/s390/hypfs/hypfs_diag.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs_diag.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,16 +0,0 @@
-/*
- * arch/s390/hypfs_diag.h
- * Hypervisor filesystem for Linux on s390.
- *
- * Copyright (C) IBM Corp. 2006
- * Author(s): Michael Holzheu <[email protected]>
- */
-
-#ifndef _HYPFS_DIAG_H_
-#define _HYPFS_DIAG_H_
-
-extern int hypfs_diag_init(void);
-extern void hypfs_diag_exit(void);
-extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
-
-#endif /* _HYPFS_DIAG_H_ */
diff -urpN linux-2.6/arch/s390/hypfs/hypfs.h linux-2.6-patched/arch/s390/hypfs/hypfs.h
--- linux-2.6/arch/s390/hypfs/hypfs.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs.h 2007-01-26 17:29:36.000000000 +0100
@@ -27,4 +27,13 @@ extern struct dentry *hypfs_create_str(s
struct dentry *dir, const char *name,
char *string);
+/* LPAR Hypervisor */
+extern int hypfs_diag_init(void);
+extern void hypfs_diag_exit(void);
+extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
+
+/* VM Hypervisor */
+extern int hypfs_vm_init(void);
+extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
+
#endif /* _HYPFS_H_ */
diff -urpN linux-2.6/arch/s390/hypfs/hypfs_vm.c linux-2.6-patched/arch/s390/hypfs/hypfs_vm.c
--- linux-2.6/arch/s390/hypfs/hypfs_vm.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs_vm.c 2007-01-26 17:29:36.000000000 +0100
@@ -0,0 +1,231 @@
+/*
+ * Hypervisor filesystem for Linux on s390. z/VM implementation.
+ *
+ * Copyright (C) IBM Corp. 2006
+ * Author(s): Michael Holzheu <[email protected]>
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+#include <asm/ebcdic.h>
+#include "hypfs.h"
+
+#define NAME_LEN 8
+
+static char local_guest[] = " ";
+static char all_guests[] = "* ";
+static char *guest_query;
+
+struct diag2fc_data {
+ __u32 version;
+ __u32 flags;
+ __u64 used_cpu;
+ __u64 el_time;
+ __u64 mem_min_kb;
+ __u64 mem_max_kb;
+ __u64 mem_share_kb;
+ __u64 mem_used_kb;
+ __u32 pcpus;
+ __u32 lcpus;
+ __u32 vcpus;
+ __u32 cpu_min;
+ __u32 cpu_max;
+ __u32 cpu_shares;
+ __u32 cpu_use_samp;
+ __u32 cpu_delay_samp;
+ __u32 page_wait_samp;
+ __u32 idle_samp;
+ __u32 other_samp;
+ __u32 total_samp;
+ char guest_name[NAME_LEN];
+};
+
+struct diag2fc_parm_list {
+ char userid[NAME_LEN];
+ char aci_grp[NAME_LEN];
+ __u64 addr;
+ __u32 size;
+ __u32 fmt;
+};
+
+static int diag2fc(int size, char* query, void *addr)
+{
+ unsigned long residual_cnt;
+ unsigned long rc;
+ struct diag2fc_parm_list parm_list;
+
+ memcpy(parm_list.userid, query, NAME_LEN);
+ ASCEBC(parm_list.userid, NAME_LEN);
+ parm_list.addr = (unsigned long) addr ;
+ parm_list.size = size;
+ parm_list.fmt = 0x02;
+ memset(parm_list.aci_grp, 0x40, NAME_LEN);
+ rc = -1;
+
+ asm volatile(
+ " diag %0,%1,0x2fc\n"
+ "0:\n"
+ EX_TABLE(0b,0b)
+ : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory");
+
+ if ((rc != 0 ) && (rc != -2))
+ return rc;
+ else
+ return -residual_cnt;
+}
+
+static struct diag2fc_data *diag2fc_store(char *query, int *count)
+{
+ int size;
+ struct diag2fc_data *data;
+
+ do {
+ size = diag2fc(0, query, NULL);
+ if (size < 0)
+ return ERR_PTR(-EACCES);
+ data = vmalloc(size);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+ if (diag2fc(size, query, data) == 0)
+ break;
+ vfree(data);
+ } while (1);
+ *count = (size / sizeof(*data));
+
+ return data;
+}
+
+static void diag2fc_free(void *data)
+{
+ vfree(data);
+}
+
+#define ATTRIBUTE(sb, dir, name, member) \
+do { \
+ void *rc; \
+ rc = hypfs_create_u64(sb, dir, name, member); \
+ if (IS_ERR(rc)) \
+ return PTR_ERR(rc); \
+} while(0)
+
+static int hpyfs_vm_create_guest(struct super_block *sb,
+ struct dentry *systems_dir,
+ struct diag2fc_data *data)
+{
+ char guest_name[NAME_LEN + 1] = {};
+ struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir;
+ int dedicated_flag, capped_value;
+
+ capped_value = (data->flags & 0x00000006) >> 1;
+ dedicated_flag = (data->flags & 0x00000008) >> 3;
+
+ /* guest dir */
+ memcpy(guest_name, data->guest_name, NAME_LEN);
+ EBCASC(guest_name, NAME_LEN);
+ strstrip(guest_name);
+ guest_dir = hypfs_mkdir(sb, systems_dir, guest_name);
+ if (IS_ERR(guest_dir))
+ return PTR_ERR(guest_dir);
+ ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time);
+
+ /* logical cpu information */
+ cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus");
+ if (IS_ERR(cpus_dir))
+ return PTR_ERR(cpus_dir);
+ ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu);
+ ATTRIBUTE(sb, cpus_dir, "capped", capped_value);
+ ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag);
+ ATTRIBUTE(sb, cpus_dir, "count", data->vcpus);
+ ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min);
+ ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max);
+ ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares);
+
+ /* memory information */
+ mem_dir = hypfs_mkdir(sb, guest_dir, "mem");
+ if (IS_ERR(mem_dir))
+ return PTR_ERR(mem_dir);
+ ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb);
+ ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb);
+ ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb);
+ ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb);
+
+ /* samples */
+ samples_dir = hypfs_mkdir(sb, guest_dir, "samples");
+ if (IS_ERR(samples_dir))
+ return PTR_ERR(samples_dir);
+ ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp);
+ ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp);
+ ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp);
+ ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp);
+ ATTRIBUTE(sb, samples_dir, "other", data->other_samp);
+ ATTRIBUTE(sb, samples_dir, "total", data->total_samp);
+ return 0;
+}
+
+int hypfs_vm_create_files(struct super_block *sb, struct dentry *root)
+{
+ struct dentry *dir, *file;
+ struct diag2fc_data *data;
+ int rc, i, count = 0;
+
+ data = diag2fc_store(guest_query, &count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ /* Hpervisor Info */
+ dir = hypfs_mkdir(sb, root, "hyp");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+ file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor");
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ goto failed;
+ }
+
+ /* physical cpus */
+ dir = hypfs_mkdir(sb, root, "cpus");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+ file = hypfs_create_u64(sb, dir, "count", data->lcpus);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ goto failed;
+ }
+
+ /* guests */
+ dir = hypfs_mkdir(sb, root, "systems");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+
+ for (i = 0; i < count; i++) {
+ rc = hpyfs_vm_create_guest(sb, dir, &(data[i]));
+ if (rc)
+ goto failed;
+ }
+ diag2fc_free(data);
+ return 0;
+
+failed:
+ diag2fc_free(data);
+ return rc;
+}
+
+int hypfs_vm_init(void)
+{
+ if (diag2fc(0, all_guests, NULL) > 0)
+ guest_query = all_guests;
+ else if (diag2fc(0, local_guest, NULL) > 0)
+ guest_query = local_guest;
+ else
+ return -EACCES;
+
+ return 0;
+}
diff -urpN linux-2.6/arch/s390/hypfs/inode.c linux-2.6-patched/arch/s390/hypfs/inode.c
--- linux-2.6/arch/s390/hypfs/inode.c 2007-01-26 17:27:27.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/inode.c 2007-01-26 17:29:36.000000000 +0100
@@ -19,7 +19,6 @@
#include <linux/module.h>
#include <asm/ebcdic.h>
#include "hypfs.h"
-#include "hypfs_diag.h"
#define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */
#define TMP_SIZE 64 /* size of temporary buffers */
@@ -192,7 +191,10 @@ static ssize_t hypfs_aio_write(struct ki
goto out;
}
hypfs_delete_tree(sb->s_root);
- rc = hypfs_diag_create_files(sb, sb->s_root);
+ if (MACHINE_IS_VM)
+ rc = hypfs_vm_create_files(sb, sb->s_root);
+ else
+ rc = hypfs_diag_create_files(sb, sb->s_root);
if (rc) {
printk(KERN_ERR "hypfs: Update failed\n");
hypfs_delete_tree(sb->s_root);
@@ -289,7 +291,10 @@ static int hypfs_fill_super(struct super
rc = -ENOMEM;
goto err_alloc;
}
- rc = hypfs_diag_create_files(sb, root_dentry);
+ if (MACHINE_IS_VM)
+ rc = hypfs_vm_create_files(sb, root_dentry);
+ else
+ rc = hypfs_diag_create_files(sb, root_dentry);
if (rc)
goto err_tree;
sbi->update_file = hypfs_create_update_file(sb, root_dentry);
@@ -462,11 +467,15 @@ static int __init hypfs_init(void)
{
int rc;
- if (MACHINE_IS_VM)
- return -ENODATA;
- if (hypfs_diag_init()) {
- rc = -ENODATA;
- goto fail_diag;
+ if (MACHINE_IS_VM) {
+ if (hypfs_vm_init())
+ /* no diag 2fc, just exit */
+ return -ENODATA;
+ } else {
+ if (hypfs_diag_init()) {
+ rc = -ENODATA;
+ goto fail_diag;
+ }
}
kset_set_kset_s(&s390_subsys, hypervisor_subsys);
rc = subsystem_register(&s390_subsys);
@@ -480,7 +489,8 @@ static int __init hypfs_init(void)
fail_filesystem:
subsystem_unregister(&s390_subsys);
fail_sysfs:
- hypfs_diag_exit();
+ if (!MACHINE_IS_VM)
+ hypfs_diag_exit();
fail_diag:
printk(KERN_ERR "hypfs: Initialization failed with rc = %i.\n", rc);
return rc;
@@ -488,7 +498,8 @@ fail_diag:
static void __exit hypfs_exit(void)
{
- hypfs_diag_exit();
+ if (!MACHINE_IS_VM)
+ hypfs_diag_exit();
unregister_filesystem(&hypfs_type);
subsystem_unregister(&s390_subsys);
}
diff -urpN linux-2.6/arch/s390/hypfs/Makefile linux-2.6-patched/arch/s390/hypfs/Makefile
--- linux-2.6/arch/s390/hypfs/Makefile 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/Makefile 2007-01-26 17:29:36.000000000 +0100
@@ -4,4 +4,4 @@
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
-s390_hypfs-objs := inode.o hypfs_diag.o
+s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o
-
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