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#ifndef _LINUX_SNAPAPICALLUSER_H
#define _LINUX_SNAPAPICALLUSER_H
/* snapapi.h
Copyright (C) Acronis, 2004
Copyright (C) CyberProtect
*/
#ifdef __linux__
#include <linux/types.h>
#include <linux/ioctl.h>
#endif
#include "sn_huge_ptr.h"
#include "version.h"
#define SNAPCTL_NAME "snapctl"
#pragma pack(1)
struct snapctl_init {
unsigned int major;
unsigned int minor;
int prealloc; /* flag to allocate cache in advance */
};
struct snapctl_ldmap {
unsigned long long map_size; /* size of map in bits */
SN_HUGE_PTR(void *map); /* bitmap itself */
};
struct snapctl_getmap {
unsigned long long map_size; /* size of map in bits [in]*/
SN_HUGE_PTR(void *map); /* bitmap itself [in, out]*/
unsigned int bsize; /* BlockSize */
unsigned int fblock; /* FirstDataBlock */
unsigned int bpgroup; /* BlocksPerGroup */
unsigned int gcount; /* GroupCount */
};
struct group_entry {
unsigned long long bno;
unsigned int group;
char init;
char cached;
unsigned char pad[2];
};
struct snapctl_getsparsedmap {
unsigned long long map_size; /* size of map in bits [in]*/
SN_HUGE_PTR(void *map); /* bitmap itself [in, out]*/
unsigned int bsize; /* BlockSize */
unsigned int fblock; /* FirstDataBlock */
unsigned int bpgroup; /* BlocksPerGroup */
unsigned int gcount; /* GroupCount */
SN_HUGE_PTR2(struct group_entry* groups); /* array of groups */
};
struct snapctl_getbno {
SN_HUGE_PTR(unsigned long long *bno); /* user-level buffer */
};
struct sn_rdcache {
unsigned long long bno; /* bno from cache */
unsigned int count; /* count of blocks */
unsigned int size; /* size of buf in bytes */
SN_HUGE_PTR(void *buf); /* user space buffer */
};
struct snapctl_rdcache {
SN_HUGE_PTR(struct sn_rdcache *data);
unsigned int size; /* size of sn_rdcache */
};
struct snapctl_bread {
unsigned long long bstart; /* start block number*/
unsigned int count; /* count */
unsigned int flags; /* flags */
#define SNAP_READ_ONCE 1
SN_HUGE_PTR(void *data); /* data */
unsigned long long bincache; /* Blocks in cache */
};
struct snapctl_bfree {
unsigned long long bstart; /* start block number*/
unsigned long long count; /* count */
};
/* cut points for s_rcdepthcnt stats */
#define SNAP_RCDEPTH0 128
#define SNAP_RCDEPTH1 (8 * SNAP_RCDEPTH0)
#define SNAP_RCDEPTH2 (8 * SNAP_RCDEPTH1)
#define SNAP_RCDEPTH3 (8 * SNAP_RCDEPTH2)
struct sn_state {
unsigned version; /* snapapi version */
unsigned int major;
unsigned int minor;
unsigned int state; /* session state */
int blksize;
int mmapsize; /* mmap max size in bytes */
int minorshft; /* device minor shift */
unsigned long long partsize; /* partition size in Kbytes */
unsigned long long partstrt; /* partition start in sectors */
/* current values */
int bhpages; /* delayed bhs pages */
int bhcount; /* delayed bhs count */
int emmax; /* emergency buffer max size(pages) */
int emmin; /* emergency buffer min size*/
int emcur; /* emergency buffer current pages */
int cachepages; /* pages in cache */
unsigned long long gpages; /* got pages */
unsigned long long ppages; /* put pages */
unsigned long long abhs; /* allocated bhs */
unsigned long long fbhs; /* freed bhs */
unsigned long long dbhs; /* delayed bhs */
unsigned long long rblocks; /* read blocks */
unsigned long long cblocks; /* cached blocks */
unsigned long long rcblocks; /* read from cache */
unsigned long long fcblocks; /* freed cache blocks */
unsigned long long mcblocks; /* max blocks in cache */
unsigned long long rwcolls; /* read/write collisions */
unsigned long long rc2blocks; /* read to cache2 blocks */
unsigned int sync_req; /* sync requests */
unsigned int mipr; /* max increase pending requests */
unsigned int async_req; /* async requests */
unsigned int iprcnt; /* increase pending requests count */
unsigned int async_retr; /* async retries */
unsigned int mbio; /* min bio size */
unsigned int ioctlcnt;
unsigned int ioctlpid;
/* Can be used by userspace to determine which part of extra state was filled by snapapi */
unsigned int extrasize; /* = sizeof(sn_state) - offsetof(sn_state, extrasize). */
/* extra state */
unsigned long long rccalls; /* total number of searches in blkcache (sa_cache_chain_read calls) */
unsigned long long maxrcdepth; /* length of the deepest search in any blkcache chain */
unsigned long long rcdepthcnt[4]; /* total counts of blkcache searches with depth > SNAP_RCDEPTHi */
unsigned long long flags; /* flags with info about kernel module. f.e. if it built exactly for running kernel*/
#define KERNEL_NOT_MATCHED (1ULL << 0)
};
struct snapctl_state {
SN_HUGE_PTR(struct sn_state *state); /* user-level buffer */
unsigned int size; /* size of user buf */
/* session states */
#define SNAP_NOTINITED 0
#define SNAP_ININIT 1
#define SNAP_INITED 2
#define SNAP_FREEZING 3
#define SNAP_FROZEN 4
#define SNAP_INITINGMAP 5
#define SNAP_MAPPED 6
#define SNAP_CLOSING 7
#define SNAP_CLOSED 8
#define SNAP_READINGMAP 9
#define SNAP_FREEZE_ERR (1 << 8)
#define SNAP_MAP_ERR (2 << 8)
#define SNAP_READING_ERR (3 << 8)
#define SNAP_DEADLOCK_ERR (4 << 8)
};
/* not related to session helpers */
struct sn_devinfo {
unsigned int major;
unsigned int minor;
int blksize;
unsigned long long partsize; /* partition size in sectors */
unsigned long long partstrt; /* partition start in sectors */
int minorshft; /* device minor shift */
unsigned long long reads, read_sectors, writes, write_sectors;
};
struct snapctl_devinfo {
unsigned int major;
unsigned int minor;
SN_HUGE_PTR(struct sn_devinfo *info); /* user-level buffer */
unsigned int size; /* size of user buf */
};
struct snapctl_devlock {
unsigned int major;
unsigned int minor;
};
struct snapctl_devunlock {
unsigned int major;
unsigned int minor;
};
struct snapctl_devlockread {
unsigned int major;
unsigned int minor;
};
struct snapctl_devunlockread {
unsigned int major;
unsigned int minor;
};
struct snapctl_disklock {
unsigned int major;
unsigned int minor;
SN_HUGE_PTR(void *info); /* user-level buffer */
unsigned int size; /* size of user buf */
};
struct snapctl_diskunlock {
unsigned int major;
unsigned int minor;
};
struct snapctl_messqstate {
SN_HUGE_PTR(unsigned int *state);
};
struct snapctl_resetatime {
unsigned int fd; /* file descriptor */
};
#define SNAPCTL_INIT _IOW(CTLTYPE, 0, \
struct snapctl_init)
#define SNAPCTL_FREEZE _IO(CTLTYPE, 1)
#define SNAPCTL_LDMAP _IOW(CTLTYPE, 2, \
struct snapctl_ldmap)
#define SNAPCTL_GETBNO _IOW(CTLTYPE, 3, \
struct snapctl_getbno)
#define SNAPCTL_BREAD _IOW(CTLTYPE, 4, \
struct snapctl_bread)
#define SNAPCTL_BFREE _IOW(CTLTYPE, 5, \
struct snapctl_bfree)
#define SNAPCTL_STATE _IOW(CTLTYPE, 6, \
struct snapctl_state)
#define SNAPCTL_DEVINFO _IOW(CTLTYPE, 7, \
struct snapctl_devinfo)
#define SNAPCTL_DEVLOCK _IOW(CTLTYPE, 8, \
struct snapctl_devlock)
#define SNAPCTL_DEVUNLOCK _IOW(CTLTYPE, 9, \
struct snapctl_devunlock)
#define SNAPCTL_UNFREEZE _IO(CTLTYPE, 10)
#define SNAPCTL_MESSQSTATE _IOW(CTLTYPE, 11, \
struct snapctl_messqstate)
#define SNAPCTL_RESETATIME _IOW(CTLTYPE, 12, \
struct snapctl_resetatime)
#define SNAPCTL_RDCACHE _IOW(CTLTYPE, 13, \
struct snapctl_rdcache)
#define SNAPCTL_REGISTER_BLKDEV _IOW(CTLTYPE, 14, \
struct snapctl_register_blkdev)
#define SNAPCTL_UNREGISTER_BLKDEV _IO(CTLTYPE, 15)
#define SNAPCTL_SET_VEID _IOW(CTLTYPE, 16, \
unsigned int)
/* ioctls for snapshot block device */
#define SNAPCTL_START_SWAP_THREAD _IO(CTLTYPE, 17)
#define SNAPCTL_STOP_SWAP_THREAD _IO(CTLTYPE, 18)
#define SNAPCTL_GETMAP _IOW(CTLTYPE, 19, \
struct snapctl_getmap)
#define SNAPCTL_DEVLOCKREAD _IOW(CTLTYPE, 20, \
struct snapctl_devlockread)
#define SNAPCTL_DEVUNLOCKREAD _IOW(CTLTYPE, 21, \
struct snapctl_devunlockread)
#define SNAPCTL_GETSPARSEDMAP _IOW(CTLTYPE, 22, \
struct snapctl_getsparsedmap)
struct snap_message {
unsigned int code;
unsigned int major;
unsigned int minor;
unsigned long long begin;
unsigned long long size;
unsigned int pad;
}; /* PAGE_SIZE % sizeof(struct snap_message) must be == 0 */
#pragma pack()
#ifdef __KERNEL__
#define SNAP_PREALLOC_DEFAULT 0
#define SNAP_PREALLOC_FORCE_ON 1
#define SNAP_PREALLOC_FORCE_OFF 2
#define SNAP_EMERGENCY_SIZE_MIN 1024
long snapapi3_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
long snapapi_compat_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
int snapapi_open(struct inode *ino, struct file *file);
ssize_t snapapi_read(struct file * filp, char * buf, size_t count, loff_t *ppos);
ssize_t snapapi_write(struct file *filp, const char *buf, size_t count, loff_t *ppos);
unsigned int snapapi_poll(struct file *filp, poll_table *wait);
int snapapi_mmap(struct file * file, struct vm_area_struct * vma);
int snapapi_release(struct inode *ino, struct file *file);
int validate_kernel_version(void);
int get_drv_pages(void);
void free_drv_pages(void);
void init_select_wait(void);
int start_resolver_thread(void);
void stop_resolver_thread(void);
int init_sn_blk_submit_bio(void);
int sa_sysfs_create(void);
void sa_sysfs_remove(void);
#endif /* __KERNEL__ */
#endif /* _LINUX_SNAPAPICALLUSER_H */