Adding unit test for device DAX 1G PUD support. This is patterned after
device-dax.c that tests the PMD support.
Signed-off-by: Dave Jiang <dave.ji...@intel.com>
---
test/Makefile.am | 17 +++
test/device-dax-1g.c | 336 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 353 insertions(+)
create mode 100644 test/device-dax-1g.c
diff --git a/test/Makefile.am b/test/Makefile.am
index cd2226f..f08ca1c 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -27,6 +27,7 @@ TESTS +=\
dax-dev \
dax.sh \
device-dax \
+ device-dax-1g \
mmap.sh
check_PROGRAMS +=\
@@ -34,7 +35,9 @@ check_PROGRAMS +=\
pmem-ns \
dax-dev \
dax-pmd \
+ dax-pud \
device-dax \
+ device-dax-1g \
mmap
endif
@@ -72,6 +75,7 @@ dax_dev_SOURCES = dax-dev.c $(testcore)
dax_dev_LDADD = $(LIBNDCTL_LIB) $(KMOD_LIBS)
dax_pmd_SOURCES = dax-pmd.c
+dax_pud_SOURCES = dax-pud.c
mmap_SOURCES = mmap.c
dax_errors_SOURCES = dax-errors.c
daxdev_errors_SOURCES = daxdev-errors.c \
@@ -91,6 +95,19 @@ device_dax_LDADD = \
$(JSON_LIBS) \
../libutil.a
+device_dax_1g_SOURCES = \
+ device-dax-1g.c \
+ dax-dev.c \
+ dax-pmd.c \
+ $(testcore) \
+ ../ndctl/builtin-xaction-namespace.c \
+ ../util/json.c
+device_dax_1g_LDADD = \
+ $(LIBNDCTL_LIB) \
+ $(KMOD_LIBS) \
+ $(JSON_LIBS) \
+ ../libutil.a
+
multi_pmem_SOURCES = \
multi-pmem.c \
$(testcore) \
diff --git a/test/device-dax-1g.c b/test/device-dax-1g.c
new file mode 100644
index 0000000..0d1a92d
--- /dev/null
+++ b/test/device-dax-1g.c
@@ -0,0 +1,336 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <string.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <util/size.h>
+#include <linux/falloc.h>
+#include <linux/version.h>
+#include <ndctl/libndctl.h>
+#include <daxctl/libdaxctl.h>
+#include <ccan/array_size/array_size.h>
+
+#include <builtin.h>
+#include <test.h>
+
+#define PUD_SIZE (1 << 30)
+static sigjmp_buf sj_env;
+
+static int create_namespace(int argc, const char **argv, void *ctx)
+{
+ builtin_xaction_namespace_reset();
+ return cmd_create_namespace(argc, argv, ctx);
+}
+
+static int reset_device_dax(struct ndctl_namespace *ndns)
+{
+ struct ndctl_ctx *ctx = ndctl_namespace_get_ctx(ndns);
+ const char *argv[] = {
+ "__func__", "-v", "-m", "raw", "-f", "-e", "",
+ };
+ int argc = ARRAY_SIZE(argv);
+
+ argv[argc - 1] = ndctl_namespace_get_devname(ndns);
+ return create_namespace(argc, argv, ctx);
+}
+
+static int setup_device_dax(struct ndctl_namespace *ndns)
+{
+ struct ndctl_ctx *ctx = ndctl_namespace_get_ctx(ndns);
+ const char *argv[] = {
+ "__func__", "-v", "-m", "dax", "-M", "mem", "-f",
+ "-a", "0x40000000", "-e", "",
+ };
+ int argc = ARRAY_SIZE(argv);
+
+ argv[argc - 1] = ndctl_namespace_get_devname(ndns);
+ return create_namespace(argc, argv, ctx);
+}
+
+static int setup_pmem_memory_mode(struct ndctl_namespace *ndns)
+{
+ struct ndctl_ctx *ctx = ndctl_namespace_get_ctx(ndns);
+ const char *argv[] = {
+ "__func__", "-v", "-m", "memory", "-M", "dev", "-f",
+ "-a", "0x40000000", "-e", "",
+ };
+ int argc = ARRAY_SIZE(argv);
+
+ argv[argc - 1] = ndctl_namespace_get_devname(ndns);
+ return create_namespace(argc, argv, ctx);
+}
+
+static void sigbus(int sig, siginfo_t *siginfo, void *d)
+{
+ siglongjmp(sj_env, 1);
+}
+
+#define VERIFY_SIZE SZ_1G
+#define VERIFY_BUF_SIZE 4096
+
+static int verify_data(struct daxctl_dev *dev, char *dax_buf, int salt,
+ struct ndctl_test *test)
+{
+ struct timeval tv1, tv2, tv_diff;
+ int i;
+
+ if (!ndctl_test_attempt(test, KERNEL_VERSION(4, 9, 0)))
+ return 0;
+
+ /* verify data and cache mode */
+ gettimeofday(&tv1, NULL);
+ for (i = 0; i < VERIFY_SIZE; i += VERIFY_BUF_SIZE) {
+ unsigned int *verify = (unsigned int *) (dax_buf + i), j;
+
+ for (j = 0; j < VERIFY_BUF_SIZE / sizeof(int); j++)
+ if (verify[j] != salt + i + j)
+ break;
+ if (j < VERIFY_BUF_SIZE / sizeof(int)) {
+ fprintf(stderr, "%s: @ %#x expected %#x got %#x\n",
+ daxctl_dev_get_devname(dev), i,
+ verify[j], salt + i + j);
+ return -ENXIO;
+ }
+ }
+ gettimeofday(&tv2, NULL);
+ timersub(&tv2, &tv1, &tv_diff);
+ tv_diff.tv_usec += tv_diff.tv_sec * 1000000;
+ if (tv_diff.tv_usec > 15000*512) {
+ /*
+ * Checks whether the kernel correctly mapped the
+ * device-dax range as cacheable. The numbers were
+ * derived from an Intel(R) Xeon(R) CPU E5-2690 v2 @
+ * 3.00GHz where the loop completes in 7500us when
+ * cached and 200ms when uncached.
+ */
+ fprintf(stderr, "%s: verify loop took too long usecs: %ld\n",
+ daxctl_dev_get_devname(dev), tv_diff.tv_usec);
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static int test_device_dax(int loglevel, struct ndctl_test *test,
+ struct ndctl_ctx *ctx)
+{
+ struct sigaction act;
+ struct ndctl_dax *dax;
+ struct ndctl_pfn *pfn;
+ struct daxctl_dev *dev;
+ int i, fd, rc, *p, salt;
+ struct ndctl_namespace *ndns;
+ struct daxctl_region *dax_region;
+ char *buf, path[100], data[VERIFY_BUF_SIZE];
+
+ memset (&act, 0, sizeof(act));
+ act.sa_sigaction = sigbus;
+ act.sa_flags = SA_SIGINFO;
+
+ if (sigaction(SIGBUS, &act, 0)) {
+ perror("sigaction");
+ return 1;
+ }
+
+ ndctl_set_log_priority(ctx, loglevel);
+
+ ndns = ndctl_get_test_dev(ctx);
+ if (!ndns) {
+ fprintf(stderr, "%s: failed to find suitable namespace\n",
+ __func__);
+ return 77;
+ }
+
+ if (!ndctl_test_attempt(test, KERNEL_VERSION(4, 7, 0)))
+ return 77;
+
+ /* setup up memory mode pmem device and seed with verification data */
+ rc = setup_pmem_memory_mode(ndns);
+ if (rc < 0 || !(pfn = ndctl_namespace_get_pfn(ndns))) {
+ fprintf(stderr, "%s: failed device-dax setup\n",
+ ndctl_namespace_get_devname(ndns));
+ goto out;
+ }
+
+ sprintf(path, "/dev/%s", ndctl_pfn_get_block_device(pfn));
+ fd = open(path, O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "%s: failed to open pmem device\n", path);
+ rc = -ENXIO;
+ goto out;
+ }
+
+ srand(getpid());
+ salt = rand();
+ for (i = 0; i < VERIFY_SIZE; i += VERIFY_BUF_SIZE) {
+ unsigned int *verify = (unsigned int *) data, j;
+
+ for (j = 0; j < VERIFY_BUF_SIZE / sizeof(int); j++)
+ verify[j] = salt + i + j;
+
+ if (write(fd, data, sizeof(data)) != sizeof(data)) {
+ fprintf(stderr, "%s: failed data setup\n",
+ path);
+ rc = -ENXIO;
+ goto out;
+ }
+ }
+ fsync(fd);
+ close(fd);
+
+ /* device DAX 1G needs 4.11 */
+ if (!ndctl_test_attempt(test, KERNEL_VERSION(4, 11, 0)))
+ return 77;
+
+ /* switch the namespace to device-dax mode and verify data via mmap */
+ rc = setup_device_dax(ndns);
+ if (rc < 0) {
+ fprintf(stderr, "%s: failed device-dax setup\n",
+ ndctl_namespace_get_devname(ndns));
+ goto out;
+ }
+
+ dax = ndctl_namespace_get_dax(ndns);
+ dax_region = ndctl_dax_get_daxctl_region(dax);
+ dev = daxctl_dev_get_first(dax_region);
+ if (!dev) {
+ fprintf(stderr, "%s: failed to find device-dax instance\n",
+ ndctl_namespace_get_devname(ndns));
+ rc = -ENXIO;
+ goto out;
+ }
+
+ sprintf(path, "/dev/%s", daxctl_dev_get_devname(dev));
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "%s: failed to open(O_RDONLY) device-dax
instance\n",
+ daxctl_dev_get_devname(dev));
+ rc = -ENXIO;
+ goto out;
+ }
+
+ buf = mmap(NULL, VERIFY_SIZE, PROT_READ, MAP_PRIVATE, fd, 0);
+ if (buf != MAP_FAILED) {
+ fprintf(stderr, "%s: expected MAP_PRIVATE failure\n", path);
+ rc = -ENXIO;
+ goto out;
+ }
+
+ buf = mmap(NULL, VERIFY_SIZE, PROT_READ, MAP_SHARED, fd, 0);
+ if (buf == MAP_FAILED) {
+ fprintf(stderr, "%s: expected MAP_SHARED success\n", path);
+ return -ENXIO;
+ }
+
+ rc = verify_data(dev, buf, salt, test);
+ if (rc)
+ goto out;
+
+ /* upgrade to a writable mapping */
+ close(fd);
+ munmap(buf, VERIFY_SIZE);
+ fd = open(path, O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "%s: failed to open(O_RDWR) device-dax
instance\n",
+ daxctl_dev_get_devname(dev));
+ rc = -ENXIO;
+ goto out;
+ }
+
+ buf = mmap(NULL, VERIFY_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (buf == MAP_FAILED) {
+ fprintf(stderr, "%s: expected PROT_WRITE + MAP_SHARED
success\n",
+ path);
+ return -ENXIO;
+ }
+
+ /*
+ * Prior to 4.11-final these tests cause crashes, or are
+ * otherwise not supported.
+ */
+ if (ndctl_test_attempt(test, KERNEL_VERSION(4, 11, 0))) {
+ int fd2;
+
+ rc = test_dax_directio(fd, PUD_SIZE, NULL, 0);
+ if (rc) {
+ fprintf(stderr, "%s: failed dax direct-i/o\n",
+ ndctl_namespace_get_devname(ndns));
+ goto out;
+ }
+
+ fd2 = open("/proc/self/smaps", O_RDONLY);
+ if (fd2 < 0) {
+ fprintf(stderr, "%s: failed smaps open\n",
+ ndctl_namespace_get_devname(ndns));
+ rc = -ENXIO;
+ goto out;
+ }
+
+ do {
+ rc = read(fd2, data, sizeof(data));
+ } while (rc > 0);
+
+ if (rc) {
+ fprintf(stderr, "%s: failed smaps retrieval\n",
+ ndctl_namespace_get_devname(ndns));
+ rc = -ENXIO;
+ goto out;
+ }
+ }
+
+ rc = reset_device_dax(ndns);
+ if (rc < 0) {
+ fprintf(stderr, "%s: failed to reset device-dax instance\n",
+ ndctl_namespace_get_devname(ndns));
+ goto out;
+ }
+
+ /* test fault after device-dax instance disabled */
+ if (sigsetjmp(sj_env, 1)) {
+ /* got sigbus, success */
+ close(fd);
+ rc = 0;
+ goto out;
+ }
+
+ rc = EXIT_SUCCESS;
+ p = (int *) (buf + (1UL << 20));
+ *p = 0xff;
+ if (ndctl_test_attempt(test, KERNEL_VERSION(4, 9, 0))) {
+ /* after 4.9 this test will properly get sigbus above */
+ rc = EXIT_FAILURE;
+ fprintf(stderr, "%s: failed to unmap after reset\n",
+ daxctl_dev_get_devname(dev));
+ }
+ close(fd);
+ out:
+ reset_device_dax(ndns);
+ return rc;
+}
+
+int __attribute__((weak)) main(int argc, char *argv[])
+{
+ struct ndctl_test *test = ndctl_test_new(0);
+ struct ndctl_ctx *ctx;
+ int rc;
+
+ if (!test) {
+ fprintf(stderr, "failed to initialize test\n");
+ return EXIT_FAILURE;
+ }
+
+ rc = ndctl_new(&ctx);
+ if (rc < 0)
+ return ndctl_test_result(test, rc);
+
+ rc = test_device_dax(LOG_DEBUG, test, ctx);
+ ndctl_unref(ctx);
+ return ndctl_test_result(test, rc);
+}
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