[S390] s390_hypfs: Add new attributes
In order to access the data of the hypfs diagnose calls from user
space also in binary form, this patch adds two new attributes in
debugfs:
* z/VM: s390_hypfs/d2fc_bin
* LPAR: s390_hypfs/d204_bin
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 95c1aaa..6b120f0 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -46,6 +46,8 @@
/* start of list of all dentries, which have to be deleted on update */
static struct dentry *hypfs_last_dentry;
+struct dentry *hypfs_dbfs_dir;
+
static void hypfs_update_update(struct super_block *sb)
{
struct hypfs_sb_info *sb_info = sb->s_fs_info;
@@ -468,20 +470,22 @@
{
int rc;
- 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;
- }
+ hypfs_dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
+ if (IS_ERR(hypfs_dbfs_dir))
+ return PTR_ERR(hypfs_dbfs_dir);
+
+ if (hypfs_diag_init()) {
+ rc = -ENODATA;
+ goto fail_debugfs_remove;
+ }
+ if (hypfs_vm_init()) {
+ rc = -ENODATA;
+ goto fail_hypfs_diag_exit;
}
s390_kobj = kobject_create_and_add("s390", hypervisor_kobj);
if (!s390_kobj) {
rc = -ENOMEM;
- goto fail_sysfs;
+ goto fail_hypfs_vm_exit;
}
rc = register_filesystem(&hypfs_type);
if (rc)
@@ -490,18 +494,22 @@
fail_filesystem:
kobject_put(s390_kobj);
-fail_sysfs:
- if (!MACHINE_IS_VM)
- hypfs_diag_exit();
-fail_diag:
+fail_hypfs_vm_exit:
+ hypfs_vm_exit();
+fail_hypfs_diag_exit:
+ hypfs_diag_exit();
+fail_debugfs_remove:
+ debugfs_remove(hypfs_dbfs_dir);
+
pr_err("Initialization of hypfs failed with rc=%i\n", rc);
return rc;
}
static void __exit hypfs_exit(void)
{
- if (!MACHINE_IS_VM)
- hypfs_diag_exit();
+ hypfs_diag_exit();
+ hypfs_vm_exit();
+ debugfs_remove(hypfs_dbfs_dir);
unregister_filesystem(&hypfs_type);
kobject_put(s390_kobj);
}