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| author | Stefano Brivio <sbrivio@redhat.com> | 2020-08-12 03:34:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-12 19:57:59 +0200 |
| commit | bcb32a1d82614ffb8a56f14c648c3970bcd2cf89 (patch) | |
| tree | 2daf3aaac456a81945b052495bf02cbd3de7e0cd /lib | |
| parent | lib/bitmap.c: fix bitmap_cut() for partial overlapping case (diff) | |
| download | linux-bcb32a1d82614ffb8a56f14c648c3970bcd2cf89.tar.xz linux-bcb32a1d82614ffb8a56f14c648c3970bcd2cf89.zip | |
lib/test_bitmap.c: add test for bitmap_cut()
Inspired by an original patch from Yury Norov: introduce a test for
bitmap_cut() that also makes sure functionality is as described for
partially overlapping src and dst.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yury Norov <yury.norov@gmail.com>
Link: http://lkml.kernel.org/r/5fc45e6bbd4fa837cd9577f8a0c1d639df90a4ce.1592155364.git.sbrivio@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_bitmap.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index 6b13150667f5..df903c53952b 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -610,6 +610,63 @@ static void __init test_for_each_set_clump8(void) expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump); } +struct test_bitmap_cut { + unsigned int first; + unsigned int cut; + unsigned int nbits; + unsigned long in[4]; + unsigned long expected[4]; +}; + +static struct test_bitmap_cut test_cut[] = { + { 0, 0, 8, { 0x0000000aUL, }, { 0x0000000aUL, }, }, + { 0, 0, 32, { 0xdadadeadUL, }, { 0xdadadeadUL, }, }, + { 0, 3, 8, { 0x000000aaUL, }, { 0x00000015UL, }, }, + { 3, 3, 8, { 0x000000aaUL, }, { 0x00000012UL, }, }, + { 0, 1, 32, { 0xa5a5a5a5UL, }, { 0x52d2d2d2UL, }, }, + { 0, 8, 32, { 0xdeadc0deUL, }, { 0x00deadc0UL, }, }, + { 1, 1, 32, { 0x5a5a5a5aUL, }, { 0x2d2d2d2cUL, }, }, + { 0, 15, 32, { 0xa5a5a5a5UL, }, { 0x00014b4bUL, }, }, + { 0, 16, 32, { 0xa5a5a5a5UL, }, { 0x0000a5a5UL, }, }, + { 15, 15, 32, { 0xa5a5a5a5UL, }, { 0x000125a5UL, }, }, + { 15, 16, 32, { 0xa5a5a5a5UL, }, { 0x0000a5a5UL, }, }, + { 16, 15, 32, { 0xa5a5a5a5UL, }, { 0x0001a5a5UL, }, }, + + { BITS_PER_LONG, BITS_PER_LONG, BITS_PER_LONG, + { 0xa5a5a5a5UL, 0xa5a5a5a5UL, }, + { 0xa5a5a5a5UL, 0xa5a5a5a5UL, }, + }, + { 1, BITS_PER_LONG - 1, BITS_PER_LONG, + { 0xa5a5a5a5UL, 0xa5a5a5a5UL, }, + { 0x00000001UL, 0x00000001UL, }, + }, + + { 0, BITS_PER_LONG * 2, BITS_PER_LONG * 2 + 1, + { 0xa5a5a5a5UL, 0x00000001UL, 0x00000001UL, 0x00000001UL }, + { 0x00000001UL, }, + }, + { 16, BITS_PER_LONG * 2 + 1, BITS_PER_LONG * 2 + 1 + 16, + { 0x0000ffffUL, 0x5a5a5a5aUL, 0x5a5a5a5aUL, 0x5a5a5a5aUL }, + { 0x2d2dffffUL, }, + }, +}; + +static void __init test_bitmap_cut(void) +{ + unsigned long b[5], *in = &b[1], *out = &b[0]; /* Partial overlap */ + int i; + + for (i = 0; i < ARRAY_SIZE(test_cut); i++) { + struct test_bitmap_cut *t = &test_cut[i]; + + memcpy(in, t->in, sizeof(t->in)); + + bitmap_cut(out, in, t->first, t->cut, t->nbits); + + expect_eq_bitmap(t->expected, out, t->nbits); + } +} + static void __init selftest(void) { test_zero_clear(); @@ -623,6 +680,7 @@ static void __init selftest(void) test_bitmap_parselist_user(); test_mem_optimisations(); test_for_each_set_clump8(); + test_bitmap_cut(); } KSTM_MODULE_LOADERS(test_bitmap); |