mirror of
https://github.com/brain-hackers/linux-brain.git
synced 2024-06-09 23:36:23 +09:00
9ebc6ef188
get_seconds() API is not y2038 safe on 32 bit systems and the API is deprecated. Replace it with calls to ktime_get_real_seconds() API instead. Change mddev structure types to time64_t accordingly. 32 bit signed timestamps will overflow in the year 2038. Change the user interface mdu_array_info_s structure timestamps: ctime and utime values used in ioctls GET_ARRAY_INFO and SET_ARRAY_INFO to unsigned int. This will extend the field to last until the year 2106. The long term plan is to get rid of ctime and utime values in this structure as this information can be read from the on-disk meta data directly. Clamp the tim64_t timestamps to positive values with a max of U32_MAX when returning from GET_ARRAY_INFO ioctl to accommodate above changes in the data type of timestamps to unsigned int. v0.90 on disk meta data uses u32 for maintaining time stamps. So this will also last until year 2106. Assumption is that the usage of v0.90 will be deprecated by year 2106. Timestamp fields in the on disk meta data for v1.0 version already use 64 bit data types. Remove the truncation of the bits while writing to or reading from these from the disk. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: NeilBrown <neilb@suse.com>
156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/*
|
|
md_u.h : user <=> kernel API between Linux raidtools and RAID drivers
|
|
Copyright (C) 1998 Ingo Molnar
|
|
|
|
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 _UAPI_MD_U_H
|
|
#define _UAPI_MD_U_H
|
|
|
|
/*
|
|
* Different major versions are not compatible.
|
|
* Different minor versions are only downward compatible.
|
|
* Different patchlevel versions are downward and upward compatible.
|
|
*/
|
|
#define MD_MAJOR_VERSION 0
|
|
#define MD_MINOR_VERSION 90
|
|
/*
|
|
* MD_PATCHLEVEL_VERSION indicates kernel functionality.
|
|
* >=1 means different superblock formats are selectable using SET_ARRAY_INFO
|
|
* and major_version/minor_version accordingly
|
|
* >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT
|
|
* in the super status byte
|
|
* >=3 means that bitmap superblock version 4 is supported, which uses
|
|
* little-ending representation rather than host-endian
|
|
*/
|
|
#define MD_PATCHLEVEL_VERSION 3
|
|
|
|
/* ioctls */
|
|
|
|
/* status */
|
|
#define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t)
|
|
#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t)
|
|
#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t)
|
|
#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
|
|
#define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t)
|
|
|
|
/* configuration */
|
|
#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
|
|
#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
|
|
#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
|
|
#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t)
|
|
#define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
|
|
#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
|
|
#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
|
|
#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
|
|
#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
|
|
#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
|
|
#define HOT_GENERATE_ERROR _IO (MD_MAJOR, 0x2a)
|
|
#define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int)
|
|
|
|
/* usage */
|
|
#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t)
|
|
/* 0x31 was START_ARRAY */
|
|
#define STOP_ARRAY _IO (MD_MAJOR, 0x32)
|
|
#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
|
|
#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
|
|
#define CLUSTERED_DISK_NACK _IO (MD_MAJOR, 0x35)
|
|
|
|
/* 63 partitions with the alternate major number (mdp) */
|
|
#define MdpMinorShift 6
|
|
|
|
typedef struct mdu_version_s {
|
|
int major;
|
|
int minor;
|
|
int patchlevel;
|
|
} mdu_version_t;
|
|
|
|
typedef struct mdu_array_info_s {
|
|
/*
|
|
* Generic constant information
|
|
*/
|
|
int major_version;
|
|
int minor_version;
|
|
int patch_version;
|
|
unsigned int ctime;
|
|
int level;
|
|
int size;
|
|
int nr_disks;
|
|
int raid_disks;
|
|
int md_minor;
|
|
int not_persistent;
|
|
|
|
/*
|
|
* Generic state information
|
|
*/
|
|
unsigned int utime; /* 0 Superblock update time */
|
|
int state; /* 1 State bits (clean, ...) */
|
|
int active_disks; /* 2 Number of currently active disks */
|
|
int working_disks; /* 3 Number of working disks */
|
|
int failed_disks; /* 4 Number of failed disks */
|
|
int spare_disks; /* 5 Number of spare disks */
|
|
|
|
/*
|
|
* Personality information
|
|
*/
|
|
int layout; /* 0 the array's physical layout */
|
|
int chunk_size; /* 1 chunk size in bytes */
|
|
|
|
} mdu_array_info_t;
|
|
|
|
/* non-obvious values for 'level' */
|
|
#define LEVEL_MULTIPATH (-4)
|
|
#define LEVEL_LINEAR (-1)
|
|
#define LEVEL_FAULTY (-5)
|
|
|
|
/* we need a value for 'no level specified' and 0
|
|
* means 'raid0', so we need something else. This is
|
|
* for internal use only
|
|
*/
|
|
#define LEVEL_NONE (-1000000)
|
|
|
|
typedef struct mdu_disk_info_s {
|
|
/*
|
|
* configuration/status of one particular disk
|
|
*/
|
|
int number;
|
|
int major;
|
|
int minor;
|
|
int raid_disk;
|
|
int state;
|
|
|
|
} mdu_disk_info_t;
|
|
|
|
typedef struct mdu_start_info_s {
|
|
/*
|
|
* configuration/status of one particular disk
|
|
*/
|
|
int major;
|
|
int minor;
|
|
int raid_disk;
|
|
int state;
|
|
|
|
} mdu_start_info_t;
|
|
|
|
typedef struct mdu_bitmap_file_s
|
|
{
|
|
char pathname[4096];
|
|
} mdu_bitmap_file_t;
|
|
|
|
typedef struct mdu_param_s
|
|
{
|
|
int personality; /* 1,2,3,4 */
|
|
int chunk_size; /* in bytes */
|
|
int max_fault; /* unused for now */
|
|
} mdu_param_t;
|
|
|
|
#endif /* _UAPI_MD_U_H */
|