diff options
Diffstat (limited to 'restripe.c')
| -rw-r--r-- | restripe.c | 48 |
1 files changed, 31 insertions, 17 deletions
@@ -194,7 +194,8 @@ int geo_map(int block, unsigned long long stripe, int raid_disks, } return -1; } -static int is_ddf(int layout) + +int is_ddf(int layout) { switch (layout) { @@ -344,16 +345,28 @@ void ensure_zero_has_size(int chunk_size) /* Following was taken from linux/drivers/md/raid6recov.c */ /* Recover two failed data blocks. */ + void raid6_2data_recov(int disks, size_t bytes, int faila, int failb, - uint8_t **ptrs) + uint8_t **ptrs, int neg_offset) { uint8_t *p, *q, *dp, *dq; uint8_t px, qx, db; const uint8_t *pbmul; /* P multiplier table for B data */ const uint8_t *qmul; /* Q multiplier table (for both) */ - p = ptrs[disks-2]; - q = ptrs[disks-1]; + if (faila > failb) { + int t = faila; + faila = failb; + failb = t; + } + + if (neg_offset) { + p = ptrs[-1]; + q = ptrs[-2]; + } else { + p = ptrs[disks-2]; + q = ptrs[disks-1]; + } /* Compute syndrome with zero for the missing data pages Use the dead data pages as temporary storage for @@ -384,13 +397,19 @@ void raid6_2data_recov(int disks, size_t bytes, int faila, int failb, } /* Recover failure of one data block plus the P block */ -void raid6_datap_recov(int disks, size_t bytes, int faila, uint8_t **ptrs) +void raid6_datap_recov(int disks, size_t bytes, int faila, uint8_t **ptrs, + int neg_offset) { uint8_t *p, *q, *dq; const uint8_t *qmul; /* Q multiplier table */ - p = ptrs[disks-2]; - q = ptrs[disks-1]; + if (neg_offset) { + p = ptrs[-1]; + q = ptrs[-2]; + } else { + p = ptrs[disks-2]; + q = ptrs[disks-1]; + } /* Compute syndrome with zero for the missing data page Use the dead data page as temporary storage for delta q */ @@ -636,16 +655,11 @@ int save_stripes(int *source, unsigned long long *offsets, if (fblock[1] == data_disks) /* One data failed, and parity failed */ raid6_datap_recov(syndrome_disks+2, chunk_size, - fdisk[0], bufs); + fdisk[0], bufs, 0); else { - if (fdisk[0] > fdisk[1]) { - int t = fdisk[0]; - fdisk[0] = fdisk[1]; - fdisk[1] = t; - } /* Two data blocks failed, P,Q OK */ raid6_2data_recov(syndrome_disks+2, chunk_size, - fdisk[0], fdisk[1], bufs); + fdisk[0], fdisk[1], bufs, 0); } } if (dest) { @@ -882,7 +896,8 @@ unsigned long long getnum(char *str, char **err) return rv; } -main(int argc, char *argv[]) +char const Name[] = "test_restripe"; +int main(int argc, char *argv[]) { /* save/restore file raid_disks chunk_size level layout start length devices... */ @@ -898,8 +913,7 @@ main(int argc, char *argv[]) char *err = NULL; if (argc < 10) { - fprintf(stderr, "Usage: test_stripe save/restore file raid_disks" - " chunk_size level layout start length devices...\n"); + fprintf(stderr, "Usage: test_stripe save/restore file raid_disks chunk_size level layout start length devices...\n"); exit(1); } if (strcmp(argv[1], "save")==0) |