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[S390] s390_hypfs: Add new attributes

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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>
This commit is contained in:
Michael Holzheu
2010-05-17 10:00:20 +02:00
committed by Martin Schwidefsky
parent cc961d400e
commit 57b28f6631
5 changed files with 230 additions and 32 deletions
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40
arch/s390/hypfs/inode.c
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@@ -46,6 +46,8 @@ static const struct super_operations hypfs_s_ops;
/* 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 @@ static int __init hypfs_init(void)
{
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 @@ static int __init hypfs_init(void)
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);
}