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dkms
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snapapi26
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0.8.65
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snapapi.h
#ifndef _LINUX_SNAPAPICALLUSER_H #define _LINUX_SNAPAPICALLUSER_H /* snapapi.h Copyright (C) Acronis, 2004 Written by Vladimir Simonov $Id: snapapi.h 1262030 2018-01-11 12:33:11Z marina $ */ #ifdef __linux__ #include <linux/types.h> #include <linux/ioctl.h> #endif #include "sn_huge_ptr.h" #define SNAPCTL_NAME "snapctl" #define SNAPCTLTYPE '*' #define SNAPAPI_VMAJOR 0 #define SNAPAPI_VMINOR 8 #define SNAPAPI_VSUBMINOR 65 #define SNAPAPI_COMMON_MOD_VERSION "0.8.65" #define SNAPAPI_COMMON_MOD_EXT_VERSION "(Release)" #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(SNAPCTLTYPE, 0, \ struct snapctl_init) #define SNAPCTL_FREEZE _IO(SNAPCTLTYPE, 1) #define SNAPCTL_LDMAP _IOW(SNAPCTLTYPE, 2, \ struct snapctl_ldmap) #define SNAPCTL_GETBNO _IOW(SNAPCTLTYPE, 3, \ struct snapctl_getbno) #define SNAPCTL_BREAD _IOW(SNAPCTLTYPE, 4, \ struct snapctl_bread) #define SNAPCTL_BFREE _IOW(SNAPCTLTYPE, 5, \ struct snapctl_bfree) #define SNAPCTL_STATE _IOW(SNAPCTLTYPE, 6, \ struct snapctl_state) #define SNAPCTL_DEVINFO _IOW(SNAPCTLTYPE, 7, \ struct snapctl_devinfo) #define SNAPCTL_DEVLOCK _IOW(SNAPCTLTYPE, 8, \ struct snapctl_devlock) #define SNAPCTL_DEVUNLOCK _IOW(SNAPCTLTYPE, 9, \ struct snapctl_devunlock) #define SNAPCTL_UNFREEZE _IO(SNAPCTLTYPE, 10) #define SNAPCTL_MESSQSTATE _IOW(SNAPCTLTYPE, 11, \ struct snapctl_messqstate) #define SNAPCTL_RESETATIME _IOW(SNAPCTLTYPE, 12, \ struct snapctl_resetatime) #define SNAPCTL_RDCACHE _IOW(SNAPCTLTYPE, 13, \ struct snapctl_rdcache) #define SNAPCTL_REGISTER_BLKDEV _IOW(SNAPCTLTYPE, 14, \ struct snapctl_register_blkdev) #define SNAPCTL_UNREGISTER_BLKDEV _IO(SNAPCTLTYPE, 15) #define SNAPCTL_SET_VEID _IOW(SNAPCTLTYPE, 16, \ unsigned int) /* ioctls for snapshot block device */ #define SNAPCTL_START_SWAP_THREAD _IO(SNAPCTLTYPE, 17) #define SNAPCTL_STOP_SWAP_THREAD _IO(SNAPCTLTYPE, 18) #define SNAPCTL_GETMAP _IOW(SNAPCTLTYPE, 19, \ struct snapctl_getmap) #define SNAPCTL_DEVLOCKREAD _IOW(SNAPCTLTYPE, 20, \ struct snapctl_devlockread) #define SNAPCTL_DEVUNLOCKREAD _IOW(SNAPCTLTYPE, 21, \ struct snapctl_devunlockread) #define SNAPCTL_GETSPARSEDMAP _IOW(SNAPCTLTYPE, 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() #endif /* _LINUX_SNAPAPICALLUSER_H */
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