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/*
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <string.h>
#include <sys/statvfs.h>
#include "harness.h"
#include "mock_scrape.h"
extern const struct collector filesystem_collector;
void filesystem_test_override_statvfs(void *ctx, int (*statvfs_func)(const char *path, struct statvfs *buf));
static void mock_statvfs_clear(void);
static void mock_statvfs_add(test_env *env, const char *path, struct statvfs *buf);
static int mock_statvfs_func(const char *path, struct statvfs *buf);
TEST(filesystem_metrics) {
test_write_file(
env,
"proc/mounts",
"/dev/mapper/vg00-root / ext4 rw,relatime,errors=remount-ro 0 0\n"
"/dev/sda1 /boot ext2 rw,noatime 0 0\n"
"/dev/mapper/fake /mnt/ro btrfs ro 0 0\n");
mock_statvfs_clear();
mock_statvfs_add(env, "/", &(struct statvfs){
.f_frsize = 512,
.f_blocks = 12345678, .f_bfree = 987654, .f_bavail = 876543,
.f_files = 123456, .f_ffree = 98765, .f_favail = 87654,
.f_flag = 0 });
mock_statvfs_add(env, "/boot", &(struct statvfs){
.f_frsize = 4096,
.f_blocks = 1234567, .f_bfree = 98765, .f_bavail = 87654,
.f_files = 12345, .f_ffree = 9876, .f_favail = 8765,
.f_flag = 0 });
mock_statvfs_add(env, "/mnt/ro", &(struct statvfs){
.f_frsize = 512,
.f_blocks = 2345678, .f_bfree = 87654, .f_bavail = 76543,
.f_files = 23456, .f_ffree = 8765, .f_favail = 7654,
.f_flag = ST_RDONLY });
scrape_req *req = mock_scrape_start(env);
void *ctx = filesystem_collector.init(0, 0);
filesystem_test_override_statvfs(ctx, mock_statvfs_func);
filesystem_collector.collect(req, ctx);
struct label *labels;
labels = LABEL_LIST({"device", "/dev/mapper/vg00-root"}, {"fstype", "ext4"}, {"mountpoint", "/"});
mock_scrape_expect(req, "node_filesystem_avail_bytes", labels, 448790016);
mock_scrape_expect(req, "node_filesystem_files", labels, 123456);
mock_scrape_expect(req, "node_filesystem_files_free", labels, 98765);
mock_scrape_expect(req, "node_filesystem_free_bytes", labels, 505678848);
mock_scrape_expect(req, "node_filesystem_readonly", labels, 0);
mock_scrape_expect(req, "node_filesystem_size_bytes", labels, 6320987136);
labels = LABEL_LIST({"device", "/dev/sda1"}, {"fstype", "ext2"}, {"mountpoint", "/boot"});
mock_scrape_expect(req, "node_filesystem_avail_bytes", labels, 359030784);
mock_scrape_expect(req, "node_filesystem_files", labels, 12345);
mock_scrape_expect(req, "node_filesystem_files_free", labels, 9876);
mock_scrape_expect(req, "node_filesystem_free_bytes", labels, 404541440);
mock_scrape_expect(req, "node_filesystem_readonly", labels, 0);
mock_scrape_expect(req, "node_filesystem_size_bytes", labels, 5056786432);
labels = LABEL_LIST({"device", "/dev/mapper/fake"}, {"fstype", "btrfs"}, {"mountpoint", "/mnt/ro"});
mock_scrape_expect(req, "node_filesystem_avail_bytes", labels, 39190016);
mock_scrape_expect(req, "node_filesystem_files", labels, 23456);
mock_scrape_expect(req, "node_filesystem_files_free", labels, 8765);
mock_scrape_expect(req, "node_filesystem_free_bytes", labels, 44878848);
mock_scrape_expect(req, "node_filesystem_readonly", labels, 1);
mock_scrape_expect(req, "node_filesystem_size_bytes", labels, 1200987136);
mock_scrape_expect_no_more(req);
mock_scrape_free(req);
}
TEST_SUITE {
TEST_SUITE_START;
RUN_TEST(filesystem_metrics);
TEST_SUITE_END;
}
// helpers for mocking statvfs calls
#define MAX_STATVFS_MOCKS 16
static struct { const char *path; struct statvfs buf; } mock_statvfs_data[MAX_STATVFS_MOCKS];
static unsigned mock_statvfs_data_count = 0;
static void mock_statvfs_clear(void) {
mock_statvfs_data_count = 0;
}
static void mock_statvfs_add(test_env *env, const char *path, struct statvfs *buf) {
if (mock_statvfs_data_count >= MAX_STATVFS_MOCKS)
test_fail(env, "too many statvfs(2) mocks");
mock_statvfs_data[mock_statvfs_data_count].path = path;
mock_statvfs_data[mock_statvfs_data_count].buf = *buf;
mock_statvfs_data_count++;
}
static int mock_statvfs_func(const char *path, struct statvfs *buf) {
for (unsigned i = 0; i < mock_statvfs_data_count; i++) {
if (strcmp(mock_statvfs_data[i].path, path) == 0) {
*buf = mock_statvfs_data[i].buf;
return 0;
}
}
errno = ENOENT;
return -1;
}
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