patch-1.3.69 linux/include/linux/md.h

• Lines: 301
• Date: Mon Feb 26 13:51:46 1996
• Orig file: v1.3.68/linux/include/linux/md.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.68/linux/include/linux/md.h linux/include/linux/md.h
@@ -0,0 +1,300 @@
+
+/*
+   md.h : Multiple Devices driver for Linux
+          Copyright (C) 1994-96 Marc ZYNGIER
+	  <zyngier@ufr-info-p7.ibp.fr> or
+	  <maz@gloups.fdn.fr>
+	  
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+   
+   You should have received a copy of the GNU General Public License
+   (for example /usr/src/linux/COPYING); if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
+*/
+
+#ifndef _MD_H
+#define _MD_H
+
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/ioctl.h>
+
+#define MD_VERSION "0.34"
+
+/* ioctls */
+#define REGISTER_DEV _IO (MD_MAJOR, 1)
+#define START_MD     _IO (MD_MAJOR, 2)
+#define STOP_MD      _IO (MD_MAJOR, 3)
+#define MD_INVALID   _IO (MD_MAJOR, 4)
+#define MD_VALID     _IO (MD_MAJOR, 5)
+
+/*
+   personalities :
+   Byte 0 : Chunk size factor
+   Byte 1 : Fault tolerance count for each physical device
+            (   0 means no fault tolerance,
+             0xFF means always tolerate faults)
+   Byte 2 : Personality
+   Byte 3 : Reserved.
+ */
+
+#define FAULT_SHIFT       8
+#define PERSONALITY_SHIFT 16
+
+#define FACTOR_MASK       0xFFUL
+#define FAULT_MASK        0xFF00UL
+#define PERSONALITY_MASK  0xFF0000UL
+
+#define MD_RESERVED       0	/* Not used by now */
+#define LINEAR            (1UL << PERSONALITY_SHIFT)
+#define STRIPED           (2UL << PERSONALITY_SHIFT)
+#define STRIPPED          STRIPED /* Long lasting spelling mistake... */
+#define RAID0             STRIPED
+#define RAID1             (3UL << PERSONALITY_SHIFT)
+#define RAID5             (4UL << PERSONALITY_SHIFT)
+#define MAX_PERSONALITY   5
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <sys/types.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+
+#undef MD_COUNT_SIZE		/* Define this to have stats about
+				   chunk size in /proc/mdstat */
+#define MAX_REAL     8		/* Max number of physical dev per md dev */
+#define MAX_MD_DEV   4		/* Max number of md dev */
+
+#define FACTOR(a)         ((a)->repartition & FACTOR_MASK)
+#define MAX_FAULT(a)      (((a)->repartition & FAULT_MASK)>>8)
+#define PERSONALITY(a)    ((a)->repartition & PERSONALITY_MASK)
+
+#define FACTOR_SHIFT(a) (PAGE_SHIFT + (a) - 10)
+
+/* Invalidation modes */
+#define VALID          0
+#define INVALID_NEXT   1
+#define INVALID_ALWAYS 2
+#define INVALID        3	/* Only useful to md_valid_device */
+
+/* Return values from personalities to md driver */
+#define REDIRECTED_BHREQ 0 /* Redirected individual buffers
+			      (shouldn't be used anymore since 0.31) */
+#define REDIRECTED_REQ   1 /* Redirected whole request */
+#define REDIRECT_FAILED -1 /* For RAID-1 */
+
+struct real_dev
+{
+  kdev_t dev;			/* Device number */
+  int size;			/* Device size (in blocks) */
+  int offset;			/* Real device offset (in blocks) in md dev
+				   (only used in linear mode) */
+  struct inode *inode;		/* Lock inode */
+  int fault_count;		/* Fault counter for invalidation */
+  int invalid;			/* Indicate if the device is disabled :
+				   VALID          - valid
+				   INVALID_NEXT   - disabled for next access
+				   INVALID_ALWAYS - permanently disabled
+				   (for redundancy modes only) */
+};
+
+struct md_dev;
+
+struct md_personality
+{
+  char *name;
+  int (*map)(int minor, struct md_dev *md_dev, struct request *req);
+  int (*run)(int minor, struct md_dev *md_dev);
+  int (*stop)(int minor, struct md_dev *md_dev);
+  int (*status)(char *page, int minor, struct md_dev *md_dev);
+  int (*ioctl)(struct inode *inode, struct file *file,
+	       unsigned int cmd, unsigned long arg);
+  int max_invalid_dev;
+};
+
+struct md_dev
+{
+  struct md_personality *pers;
+  int repartition;
+  int invalid_dev_count;
+  int busy;
+  int nb_dev;
+  void *private;
+#ifdef MD_COUNT_SIZE
+  unsigned int smallest_count;
+  unsigned int biggest_count;
+  unsigned int equal_count;
+#endif
+};
+
+extern struct real_dev devices[MAX_MD_DEV][MAX_REAL];
+extern struct md_dev md_dev[MAX_MD_DEV];
+extern int md_size[MAX_MD_DEV];
+
+extern void make_md_request(struct request *pending, int n);
+extern char *partition_name (kdev_t dev);
+
+#if defined(CONFIG_MD_SUPPORT_RAID1) || defined(CONFIG_MD_SUPPORT_RAID5)
+extern int md_valid_device (int minor, kdev_t dev, int mode);
+extern int md_can_reemit (int minor);
+#endif
+
+extern int register_md_personality (int p_num, struct md_personality *p);
+extern int unregister_md_personality (int p_num);
+
+#endif __KERNEL__
+#endif _MD_H
+
+/*
+   md.h : Multiple Devices driver for Linux
+          Copyright (C) 1994, 1995 Marc ZYNGIER
+	  <zyngier@amertume.ufr-info-p7.ibp.fr> or
+	  <maz@gloups.fdn.fr>
+	  
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+   
+   You should have received a copy of the GNU General Public License
+   (for example /usr/src/linux/COPYING); if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
+*/
+
+#ifndef _MD_H
+#define _MD_H
+
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/ioctl.h>
+
+#define MD_VERSION "0.33"
+
+/* ioctls */
+#define REGISTER_DEV _IO (MD_MAJOR, 1)
+#define START_MD     _IO (MD_MAJOR, 2)
+#define STOP_MD      _IO (MD_MAJOR, 3)
+#define MD_INVALID   _IO (MD_MAJOR, 4)
+#define MD_VALID     _IO (MD_MAJOR, 5)
+
+/*
+   personalities :
+   Byte 0 : Chunk size factor
+   Byte 1 : Fault tolerance count for each physical device
+            (   0 means no fault tolerance,
+             0xFF means always tolerate faults)
+   Byte 2 : Personality
+   Byte 3 : Reserved.
+ */
+
+#define FAULT_SHIFT       8
+#define PERSONALITY_SHIFT 16
+
+#define FACTOR_MASK       0xFFUL
+#define FAULT_MASK        0xFF00UL
+#define PERSONALITY_MASK  0xFF0000UL
+
+#define MD_RESERVED       0	/* Not used by now */
+#define LINEAR            (1UL << PERSONALITY_SHIFT)
+#define STRIPED           (2UL << PERSONALITY_SHIFT)
+#define STRIPPED          STRIPED /* Long lasting spelling mistake... */
+#define RAID0             STRIPED
+#define RAID1             (3UL << PERSONALITY_SHIFT)
+#define RAID5             (4UL << PERSONALITY_SHIFT)
+#define MAX_PERSONALITY   5
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <sys/types.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+
+#undef MD_COUNT_SIZE		/* Define this to have stats about
+				   chunk size in /proc/mdstat */
+#define MAX_REAL     8		/* Max number of physical dev per md dev */
+#define MAX_MD_DEV   4		/* Max number of md dev */
+
+#define FACTOR(a)         ((a)->repartition & FACTOR_MASK)
+#define MAX_FAULT(a)      (((a)->repartition & FAULT_MASK)>>8)
+#define PERSONALITY(a)    ((a)->repartition & PERSONALITY_MASK)
+
+#define FACTOR_SHIFT(a) (PAGE_SHIFT + (a) - 10)
+
+/* Invalidation modes */
+#define VALID          0
+#define INVALID_NEXT   1
+#define INVALID_ALWAYS 2
+#define INVALID        3	/* Only useful to md_valid_device */
+
+/* Return values from personalities to md driver */
+#define REDIRECTED_BHREQ 0 /* Redirected individual buffers
+			      (shouldn't be used anymore since 0.31) */
+#define REDIRECTED_REQ   1 /* Redirected whole request */
+#define REDIRECT_FAILED -1 /* For RAID-1 */
+
+struct real_dev
+{
+  kdev_t dev;			/* Device number */
+  int size;			/* Device size (in blocks) */
+  int offset;			/* Real device offset (in blocks) in md dev
+				   (only used in linear mode) */
+  struct inode *inode;		/* Lock inode */
+  int fault_count;		/* Fault counter for invalidation */
+  int invalid;			/* Indicate if the device is disabled :
+				   VALID          - valid
+				   INVALID_NEXT   - disabled for next access
+				   INVALID_ALWAYS - permanently disabled
+				   (for redundancy modes only) */
+};
+
+struct md_dev;
+
+struct md_personality
+{
+  char *name;
+  int (*map)(int minor, struct md_dev *md_dev, struct request *req);
+  int (*run)(int minor, struct md_dev *md_dev);
+  int (*stop)(int minor, struct md_dev *md_dev);
+  int (*status)(char *page, int minor, struct md_dev *md_dev);
+  int (*ioctl)(struct inode *inode, struct file *file,
+	       unsigned int cmd, unsigned long arg);
+  int max_invalid_dev;
+};
+
+struct md_dev
+{
+  struct md_personality *pers;
+  int repartition;
+  int invalid_dev_count;
+  int busy;
+  int nb_dev;
+  void *private;
+#ifdef MD_COUNT_SIZE
+  unsigned int smallest_count;
+  unsigned int biggest_count;
+  unsigned int equal_count;
+#endif
+};
+
+extern struct real_dev devices[MAX_MD_DEV][MAX_REAL];
+extern struct md_dev md_dev[MAX_MD_DEV];
+extern int md_size[MAX_MD_DEV];
+
+extern void make_md_request(struct request *pending, int n);
+extern char *partition_name (kdev_t dev);
+
+#if defined(CONFIG_MD_SUPPORT_RAID1) || defined(CONFIG_MD_SUPPORT_RAID5)
+extern int md_valid_device (int minor, kdev_t dev, int mode);
+extern int md_can_reemit (int minor);
+#endif
+
+extern int register_md_personality (int p_num, struct md_personality *p);
+extern int unregister_md_personality (int p_num);
+
+#endif __KERNEL__
+#endif _MD_H