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authorMichael Holzheu <holzheu@de.ibm.com>2007-02-05 21:18:29 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-02-05 21:18:29 +0100
commit31cb4bd31a48f62105d037ad53192b94d4c08f53 (patch)
treeecfbdc24742474f3d14efb1799d7994bbaa67612 /arch/s390/hypfs/inode.c
parent[S390] Add crypto support for 3592 tape devices (diff)
downloadlinux-dev-31cb4bd31a48f62105d037ad53192b94d4c08f53.tar.xz
linux-dev-31cb4bd31a48f62105d037ad53192b94d4c08f53.zip
[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 <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/hypfs/inode.c')
-rw-r--r--arch/s390/hypfs/inode.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index b6716c4b9934..a4fda7b53640 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -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 kiocb *iocb, const struct iovec *iov,
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_block *sb, void *data, int silent)
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);
}