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@ -1,4 +1,5 @@
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#include "osd.h"
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#include "xor.h"
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void osd_t::exec_primary_read(osd_op_t *cur_op)
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{
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@ -29,7 +30,6 @@ void osd_t::exec_primary_read(osd_op_t *cur_op)
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return;
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}
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// role -> start, end
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void *buf = memalign(MEM_ALIGNMENT, cur_op->op.rw.len);
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uint64_t reads[pgs[pg_num].pg_minsize*2] = { 0 };
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for (int role = 0; role < pgs[pg_num].pg_minsize; role++)
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{
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@ -41,6 +41,8 @@ void osd_t::exec_primary_read(osd_op_t *cur_op)
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}
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if (pgs[pg_num].pg_cursize == 3)
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{
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// Fast happy-path
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void *buf = memalign(MEM_ALIGNMENT, cur_op->op.rw.len);
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}
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else
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@ -67,7 +69,7 @@ void osd_t::exec_primary_read(osd_op_t *cur_op)
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else
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{
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real_reads[j*2] = reads[j*2] < reads[role*2] ? reads[j*2] : reads[role*2];
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real_reads[j*2] = reads[j*2+1] > reads[role*2+1] ? reads[j*2+1] : reads[role*2+1];
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real_reads[j*2+1] = reads[j*2+1] > reads[role*2+1] ? reads[j*2+1] : reads[role*2+1];
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}
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exist++;
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if (exist >= pgs[pg_num].pg_minsize)
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@ -78,6 +80,31 @@ void osd_t::exec_primary_read(osd_op_t *cur_op)
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}
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}
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}
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uint64_t pos[pgs[pg_num].pg_size];
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uint64_t buf_size = 0;
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for (int role = 0; role < pgs[pg_num].pg_size; role++)
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{
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pos[role] = buf_size;
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buf_size += real_reads[role*2+1];
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}
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void *buf = memalign(MEM_ALIGNMENT, buf_size);
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// ...<SUBMIT READS AND GET REPLIES>...
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// Reconstruct missing stripes
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for (int role = 0; role < pgs[pg_num].pg_minsize; role++)
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{
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if (reads[role*2+1] != 0 && pgs[pg_num].target_set[role] == UINT64_MAX)
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{
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int other = role == 0 ? 1 : 0;
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int parity = pgs[pg_num].pg_size-1;
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memxor(
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buf + pos[other] + (real_reads[other*2]-reads[role*2]),
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buf + pos[parity] + (real_reads[parity*2]-reads[role*2]),
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buf + pos[role], reads[role*2+1]-reads[role*2]
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);
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}
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}
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// Send buffer in parts to avoid copying
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}
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}
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