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author | Markus Stockhausen <stockhausen@collogia.de> | 2014-12-15 02:57:04 +0100 |
---|---|---|
committer | NeilBrown <neilb@suse.de> | 2015-04-22 00:00:42 +0200 |
commit | 7e92e1d7629b00578cef22b1f4c6ada726663701 (patch) | |
tree | 4aeceed85c09478c06fc3e0ff9d1bb2cfa67071a /lib | |
parent | md/raid6 algorithms: delta syndrome functions (diff) | |
download | linux-7e92e1d7629b00578cef22b1f4c6ada726663701.tar.xz linux-7e92e1d7629b00578cef22b1f4c6ada726663701.zip |
md/raid6 algorithms: improve test program
It is always helpful to have a test tool in place if we implement
new data critical algorithms. So add some test routines to the raid6
checker that can prove if the new xor_syndrome() works as expected.
Run through all permutations of start/stop pages per algorithm and
simulate a xor_syndrome() assisted rmw run. After each rmw check if
the recovery algorithm still confirms that the stripe is fine.
Signed-off-by: Markus Stockhausen <stockhausen@collogia.de>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/raid6/test/test.c | 51 |
1 files changed, 36 insertions, 15 deletions
diff --git a/lib/raid6/test/test.c b/lib/raid6/test/test.c index 5a485b7a7d3c..3bebbabdb510 100644 --- a/lib/raid6/test/test.c +++ b/lib/raid6/test/test.c @@ -28,11 +28,11 @@ char *dataptrs[NDISKS]; char data[NDISKS][PAGE_SIZE]; char recovi[PAGE_SIZE], recovj[PAGE_SIZE]; -static void makedata(void) +static void makedata(int start, int stop) { int i, j; - for (i = 0; i < NDISKS; i++) { + for (i = start; i <= stop; i++) { for (j = 0; j < PAGE_SIZE; j++) data[i][j] = rand(); @@ -91,34 +91,55 @@ int main(int argc, char *argv[]) { const struct raid6_calls *const *algo; const struct raid6_recov_calls *const *ra; - int i, j; + int i, j, p1, p2; int err = 0; - makedata(); + makedata(0, NDISKS-1); for (ra = raid6_recov_algos; *ra; ra++) { if ((*ra)->valid && !(*ra)->valid()) continue; + raid6_2data_recov = (*ra)->data2; raid6_datap_recov = (*ra)->datap; printf("using recovery %s\n", (*ra)->name); for (algo = raid6_algos; *algo; algo++) { - if (!(*algo)->valid || (*algo)->valid()) { - raid6_call = **algo; + if ((*algo)->valid && !(*algo)->valid()) + continue; + + raid6_call = **algo; + + /* Nuke syndromes */ + memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE); + + /* Generate assumed good syndrome */ + raid6_call.gen_syndrome(NDISKS, PAGE_SIZE, + (void **)&dataptrs); + + for (i = 0; i < NDISKS-1; i++) + for (j = i+1; j < NDISKS; j++) + err += test_disks(i, j); + + if (!raid6_call.xor_syndrome) + continue; + + for (p1 = 0; p1 < NDISKS-2; p1++) + for (p2 = p1; p2 < NDISKS-2; p2++) { - /* Nuke syndromes */ - memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE); + /* Simulate rmw run */ + raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE, + (void **)&dataptrs); + makedata(p1, p2); + raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE, + (void **)&dataptrs); - /* Generate assumed good syndrome */ - raid6_call.gen_syndrome(NDISKS, PAGE_SIZE, - (void **)&dataptrs); + for (i = 0; i < NDISKS-1; i++) + for (j = i+1; j < NDISKS; j++) + err += test_disks(i, j); + } - for (i = 0; i < NDISKS-1; i++) - for (j = i+1; j < NDISKS; j++) - err += test_disks(i, j); - } } printf("\n"); } |