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bdev: add lba_range and overlapping checks

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This will be used by upcoming patches for implementing
LBA range locks.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ifa4ad8dcc0d09ccf20d35f010fcae19dcc17abc9

Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/478224
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Maciej Szwed <maciej.szwed@intel.com>
This commit is contained in:
Jim Harris 2019-12-16 09:10:16 -07:00 committed by Tomasz Zawadzki
parent 9e118adeca
commit b87080efa2
2 changed files with 74 additions and 1 deletions
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27
lib/bdev/bdev.c
View File

@ -124,6 +124,12 @@ static struct spdk_bdev_mgr g_bdev_mgr = {
.mutex = PTHREAD_MUTEX_INITIALIZER,
};
struct lba_range {
uint64_t offset;
uint64_t length;
struct spdk_bdev_channel *owner_ch;
TAILQ_ENTRY(lba_range) tailq;
};
static struct spdk_bdev_opts g_bdev_opts = {
.bdev_io_pool_size = SPDK_BDEV_IO_POOL_SIZE,
@ -1894,6 +1900,27 @@ _bdev_io_submit(void *ctx)
bdev_io->internal.in_submit_request = false;
}
bool
bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2);
bool
bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2)
{
if (range1->length == 0 || range2->length == 0) {
return false;
}
if (range1->offset + range1->length <= range2->offset) {
return false;
}
if (range2->offset + range2->length <= range1->offset) {
return false;
}
return true;
}
void
bdev_io_submit(struct spdk_bdev_io *bdev_io)
{

48
test/unit/lib/bdev/bdev.c/bdev_ut.c
View File

@ -2541,6 +2541,51 @@ bdev_set_io_timeout(void)
poll_threads();
}
static void
lba_range_overlap(void)
{
struct lba_range r1, r2;
r1.offset = 100;
r1.length = 50;
r2.offset = 0;
r2.length = 1;
CU_ASSERT(!bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 0;
r2.length = 100;
CU_ASSERT(!bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 0;
r2.length = 110;
CU_ASSERT(bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 100;
r2.length = 10;
CU_ASSERT(bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 110;
r2.length = 20;
CU_ASSERT(bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 140;
r2.length = 150;
CU_ASSERT(bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 130;
r2.length = 200;
CU_ASSERT(bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 150;
r2.length = 100;
CU_ASSERT(!bdev_lba_range_overlapped(&r1, &r2));
r2.offset = 110;
r2.length = 0;
CU_ASSERT(!bdev_lba_range_overlapped(&r1, &r2));
}
int
main(int argc, char **argv)
{
@ -2576,7 +2621,8 @@ main(int argc, char **argv)
CU_add_test(suite, "bdev_open_while_hotremove", bdev_open_while_hotremove) == NULL ||
CU_add_test(suite, "bdev_close_while_hotremove", bdev_close_while_hotremove) == NULL ||
CU_add_test(suite, "bdev_open_ext", bdev_open_ext) == NULL ||
CU_add_test(suite, "bdev_set_io_timeout", bdev_set_io_timeout) == NULL
CU_add_test(suite, "bdev_set_io_timeout", bdev_set_io_timeout) == NULL ||
CU_add_test(suite, "lba_range_overlap", lba_range_overlap) == NULL
) {
CU_cleanup_registry();
return CU_get_error();