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s390/hypfs: add interface for diagnose 0x304

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To provide access to the set-partition-resource-parameter interface
to user space add a new attribute to hypfs/debugfs:
 * s390_hypsfs/diag_304
The data for the query-partition-resource-parameters command can
be access by a read on the attribute. All other diagnose 0x304
requests need to be submitted via ioctl with CAP_SYS_ADMIN rights.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2014-01-24 09:18:52 +01:00
commit 07be038209
9 changed files with 208 additions and 5 deletions
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25
arch/s390/include/uapi/asm/hypfs.h Normal file
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@ -0,0 +1,25 @@
/*
* IOCTL interface for hypfs
*
* Copyright IBM Corp. 2013
*
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _ASM_HYPFS_CTL_H
#define _ASM_HYPFS_CTL_H
#include <linux/types.h>
struct hypfs_diag304 {
__u32 args[2];
__u64 data;
__u64 rc;
} __attribute__((packed));
#define HYPFS_IOCTL_MAGIC 0x10
#define HYPFS_DIAG304 \
_IOWR(HYPFS_IOCTL_MAGIC, 0x20, struct hypfs_diag304)
#endif