Merge pull request #4563 from sergiocazzolato/tests-interfaces-gpio-memory-control

tests: new spread test for gpio-memory-control interface

4 files changed, 129 insertions, 0 deletions

diff --git a/tests/lib/snaps/test-snapd-gpio-memory-control/Makefile b/tests/lib/snaps/test-snapd-gpio-memory-control/Makefile
new file mode 100644
index 0000000000..55766b8af2
--- /dev/null
+++ b/tests/lib/snaps/test-snapd-gpio-memory-control/Makefile
@@ -0,0 +1,5 @@
+CFLAGS += -Wall -Werror
+.PHONY: all
+all: gpiomem
+
+gpiomem: gpiomem.c \ No newline at end of file
diff --git a/tests/lib/snaps/test-snapd-gpio-memory-control/gpiomem.c b/tests/lib/snaps/test-snapd-gpio-memory-control/gpiomem.c
new file mode 100644
index 0000000000..804dca141e
--- /dev/null
+++ b/tests/lib/snaps/test-snapd-gpio-memory-control/gpiomem.c
@@ -0,0 +1,59 @@
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define MAP_SIZE 4096UL
+#define MAP_MASK (MAP_SIZE - 1)
+
+int main(int argc, char** argv)
+{
+ int fd;
+ void *map_base, *virt_addr;
+ uint32_t read_result, write_result;
+
+ uint32_t writeval = 't';
+ off_t address = 0x00000001;
+ int retval = -1;
+
+ /* Open character device */
+ if ((fd = open("/dev/gpiomem", O_RDWR)) == -1) {
+ perror("cannot open /dev/gpiomem");
+ goto close;
+ }
+
+ /* Map one page */
+ map_base = mmap(NULL, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, address & ~MAP_MASK);
+ if (map_base == MAP_FAILED) {
+ perror("cannot map gpio memory");
+ goto unmap;
+ }
+ printf("Memory mapped at address %p.\n", map_base);
+
+ /* Read memory map */
+ virt_addr = (char*)map_base + (address & MAP_MASK);
+ read_result = *((uint32_t*)virt_addr);
+ printf("Read value: %#010x\n", read_result);
+
+ /* Write memory map */
+ *((uint32_t*)virt_addr) = writeval;
+ write_result = *((uint32_t*)virt_addr);
+ printf("Written %#010x; readback %#010x\n", writeval, write_result);
+
+ retval = 0;
+
+unmap:
+ /* Unmap the page */
+ if (munmap(map_base, MAP_SIZE) == -1) {
+ perror("cannot unmap gpio memory");
+ retval = -1;
+ }
+
+close:
+ close(fd);
+ return retval;
+}
diff --git a/tests/lib/snaps/test-snapd-gpio-memory-control/snapcraft.yaml b/tests/lib/snaps/test-snapd-gpio-memory-control/snapcraft.yaml
new file mode 100644
index 0000000000..69dd6c07b2
--- /dev/null
+++ b/tests/lib/snaps/test-snapd-gpio-memory-control/snapcraft.yaml
@@ -0,0 +1,17 @@
+name: test-snapd-gpio-memory-control
+version: 1.0
+summary: Basic gpio-memory-control snap
+description: A basic snap which access to public gpiomem device
+grade: stable
+confinement: strict
+
+apps:
+ gpiomem:
+ command: gpiomem
+ plugs: [gpio-memory-control]
+
+parts:
+ test:
+ source: .
+ plugin: make
+ artifacts: [gpiomem]
diff --git a/tests/main/interfaces-gpio-memory-control/task.yaml b/tests/main/interfaces-gpio-memory-control/task.yaml
new file mode 100644
index 0000000000..94400c4f0b
--- /dev/null
+++ b/tests/main/interfaces-gpio-memory-control/task.yaml
@@ -0,0 +1,48 @@
+summary: Ensure that the gpio physical memory control interface works.
+
+details: |
+ The gpio-memory-control interface allows read/write access to all gpio memory.
+
+systems: [ubuntu-core-16-arm-*]
+
+environment:
+ CONNECTED_PATTERN: ':gpio-memory-control +test-snapd-gpio-memory-control'
+ DISCONNECTED_PATTERN: '\- +test-snapd-gpio-memory-control:gpio-memory-control'
+
+prepare: |
+ echo "Given the test-snapd-gpio-memory-control snap is installed"
+ snap install test-snapd-gpio-memory-control
+
+restore: |
+ rm -f call.error
+
+execute: |
+ if ! [ -c /dev/gpiomem ]; then
+ echo "The /dev/gpiomem device does not exist in current system"
+ exit 0
+ fi
+
+ echo "The interface is not connected by default"
+ snap interfaces | MATCH "$DISCONNECTED_PATTERN"
+
+ echo "When the interface is connected"
+ snap connect test-snapd-gpio-memory-control:gpio-memory-control
+ snap interfaces | MATCH "$CONNECTED_PATTERN"
+
+ echo "Then the snap is able read and write the physical memory"
+ test-snapd-gpio-memory-control.gpiomem
+
+ if [ "$(snap debug confinement)" = partial ] ; then
+ exit 0
+ fi
+
+ echo "When the plug is disconnected"
+ snap disconnect test-snapd-gpio-memory-control:gpio-memory-control
+ snap interfaces | MATCH "$DISCONNECTED_PATTERN"
+
+ echo "Then the snap is not able to access the gpio physical memory"
+ if test-snapd-gpio-memory-control.gpiomem 2>${PWD}/call.error; then
+ echo "Expected permission error reading the gpio physical memory with disconnected plug"
+ exit 1
+ fi
+ MATCH "Permission denied" < call.error