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Refactors the whole raid support.

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This commit is contained in:
Andrea Mazzoleni 2013-09-22 23:32:30 +02:00
parent 6868fae748
commit 53744ed2b1
5 changed files with 1374 additions and 1136 deletions
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110
raid.h
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@ -24,64 +24,84 @@
/**
* Max number of data disks for RAID6.
*/
#define RAID6_DATA_LIMIT 21
#define RAID6_DATA_LIMIT 255
/**
* Max number of data disks for RAIDQP.
*/
#define RAIDQP_DATA_LIMIT 21
/**
* Syndrome computation.
*/
void raid_gen(unsigned level, unsigned char** buffer, unsigned diskmax, unsigned size);
/*
* Recover failure of one data block x using parity i.
*/
void raid_recov_1data(unsigned char** dptrs, unsigned diskmax, unsigned size, int x, int i, unsigned char* zero);
/*
* Recover failure of two data blocks x,y using parity i,j.
*/
void raid_recov_2data(unsigned char** dptrs, unsigned diskmax, unsigned size, int x, int y, int i, int j, unsigned char* zero);
/*
* Recover failure of three data blocks x,y,z using parity i,j,k.
*/
void raid_recov_3data(unsigned char** dptrs, unsigned diskmax, unsigned size, int x, int y, int z, int i, int j, int k, unsigned char* zero);
/*
* Recover failure of four data blocks x,y,z,v using parity i,j,k,l.
*/
void raid_recov_4data(unsigned char** dptrs, unsigned diskmax, unsigned size, int x, int y, int z, int v, int i, int j, int k, int l, unsigned char* zero);
/**
* Initializes the RAID system.
*/
void raid_init(void);
/**
* Internal specialized syndrome computation.
* Computes the specified number of parities.
* \param level Number of parities to compute.
* \param vbuf Vector of pointers to the blocks for disks and parities.
* It has (::data + ::level) elements. Each element points to a buffer of ::size bytes.
* \param data Number of data disks.
* \param size Size of the blocks pointed by vbuf.
*/
void raid5_int32r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid5_mmxr2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid5_mmxr4(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid5_sse2r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid5_sse2r4(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid5_sse2r8(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid6_int32r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid6_mmxr2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid6_sse2r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raid6_sse2r4(unsigned char** buffer, unsigned diskmax, unsigned size);
void raidTP_int32r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raidTP_mmxr1(unsigned char** buffer, unsigned diskmax, unsigned size);
void raidTP_sse2r1(unsigned char** dptr, unsigned diskmax, unsigned size);
void raidTP_sse2r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raidQP_int32r2(unsigned char** dptr, unsigned diskmax, unsigned size);
void raidQP_mmxr1(unsigned char** buffer, unsigned diskmax, unsigned size);
void raidQP_sse2r1(unsigned char** dptr, unsigned diskmax, unsigned size);
void raidQP_sse2r2(unsigned char** buffer, unsigned diskmax, unsigned size);
void raid_gen(unsigned level, unsigned char** vbuf, unsigned data, unsigned size);
/*
* Recovers failure of one data block x using parity i.
* Note that only the data block is recovered. The full parity is instead destroyed.
* \param x Index of the data disk to recover. Starting from 0.
* \param i Index of the parity to use for the recovering. Starting from 0.
* \param vbuf Vector of pointers to the blocks for disks and parities.
* It has (::data + ::i + 1) elements. Each element points to a buffer of ::size bytes.
* \param data Number of data disks.
* \param zero Buffer filled with 0 of ::size bytes.
* This buffer is not modified.
* \param size Size of the blocks pointed by vbuf.
*/
void raid_recov_1data(int x, int i, unsigned char** vbuf, unsigned data, unsigned char* zero, unsigned size);
/*
* Recovers failure of two data blocks x,y using parity i,j.
* Note that only the data blocks are recovered. The full parity is instead destroyed.
*/
void raid_recov_2data(int x, int y, int i, int j, unsigned char** vbuf, unsigned data, unsigned char* zero, unsigned size);
/*
* Recovers failure of three data blocks x,y,z using parity i,j,k.
* Note that only the data blocks are recovered. The full parity is instead destroyed.
*/
void raid_recov_3data(int x, int y, int z, int i, int j, int k, unsigned char** vbuf, unsigned data, unsigned char* zero, unsigned size);
/*
* Recovers failure of four data blocks x,y,z,v using parity i,j,k,l.
* Note that only the data blocks are recovered. The full parity is instead destroyed.
*/
void raid_recov_4data(int x, int y, int z, int v, int i, int j, int k, int l, unsigned char** vbuf, unsigned data, unsigned char* zero, unsigned size);
/**
* Internal specialized parity computation.
* Only for testing.
*/
void raid5_int32r2(unsigned char** vbuf, unsigned data, unsigned size);
void raid5_int64r2(unsigned char** vbuf, unsigned data, unsigned size);
void raid5_mmxr4(unsigned char** vbuf, unsigned data, unsigned size);
void raid5_sse2r4(unsigned char** vbuf, unsigned data, unsigned size);
void raid5_sse2r8(unsigned char** vbuf, unsigned data, unsigned size);
void raid6_int32r2(unsigned char** vbuf, unsigned data, unsigned size);
void raid6_int64r2(unsigned char** vbuf, unsigned data, unsigned size);
void raid6_mmxr2(unsigned char** vbuf, unsigned data, unsigned size);
void raid6_sse2r2(unsigned char** vbuf, unsigned data, unsigned size);
void raid6_sse2r4(unsigned char** vbuf, unsigned data, unsigned size);
void raidTP_int32r2(unsigned char** vbuf, unsigned data, unsigned size);
void raidTP_int64r2(unsigned char** vbuf, unsigned data, unsigned size);
void raidTP_mmxr1(unsigned char** vbuf, unsigned data, unsigned size);
void raidTP_sse2r1(unsigned char** vbuf, unsigned data, unsigned size);
void raidTP_sse2r2(unsigned char** vbuf, unsigned data, unsigned size);
void raidQP_int32r2(unsigned char** vbuf, unsigned data, unsigned size);
void raidQP_int64r2(unsigned char** vbuf, unsigned data, unsigned size);
void raidQP_mmxr1(unsigned char** vbuf, unsigned data, unsigned size);
void raidQP_sse2r1(unsigned char** vbuf, unsigned data, unsigned size);
void raidQP_sse2r2(unsigned char** vbuf, unsigned data, unsigned size);
#endif