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https://github.com/torvalds/linux
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a178220df3
Currently the binary hypfs interfaces provides new data only once within an interval time of one second. This patch removes this restriction and now new data is returned immediately on every read on a hypfs binary file. This is done in order to allow more consistent snapshots for programs that read multiple hypfs binary files. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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* Hypervisor filesystem for Linux on s390.
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*
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* Copyright IBM Corp. 2006
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* Author(s): Michael Holzheu <holzheu@de.ibm.com>
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*/
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#ifndef _HYPFS_H_
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#define _HYPFS_H_
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/debugfs.h>
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#include <linux/workqueue.h>
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#include <linux/kref.h>
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#include <asm/hypfs.h>
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#define REG_FILE_MODE 0440
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#define UPDATE_FILE_MODE 0220
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#define DIR_MODE 0550
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extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
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extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name,
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__u64 value);
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extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name,
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char *string);
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/* LPAR Hypervisor */
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extern int hypfs_diag_init(void);
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extern void hypfs_diag_exit(void);
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extern int hypfs_diag_create_files(struct dentry *root);
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/* VM Hypervisor */
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extern int hypfs_vm_init(void);
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extern void hypfs_vm_exit(void);
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extern int hypfs_vm_create_files(struct dentry *root);
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/* VM diagnose 0c */
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int hypfs_diag0c_init(void);
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void hypfs_diag0c_exit(void);
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/* Set Partition-Resource Parameter */
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int hypfs_sprp_init(void);
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void hypfs_sprp_exit(void);
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/* debugfs interface */
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struct hypfs_dbfs_file;
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struct hypfs_dbfs_data {
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void *buf;
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void *buf_free_ptr;
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size_t size;
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struct hypfs_dbfs_file *dbfs_file;
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};
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struct hypfs_dbfs_file {
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const char *name;
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int (*data_create)(void **data, void **data_free_ptr,
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size_t *size);
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void (*data_free)(const void *buf_free_ptr);
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long (*unlocked_ioctl) (struct file *, unsigned int,
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unsigned long);
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/* Private data for hypfs_dbfs.c */
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struct mutex lock;
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struct dentry *dentry;
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};
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extern int hypfs_dbfs_init(void);
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extern void hypfs_dbfs_exit(void);
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extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
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extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
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#endif /* _HYPFS_H_ */
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