[LTP] [PATCH v4 5/6] syscalls/quotactl09: Test error when quota info hidden in filesystem

[Yang Xu]

This case is similar to quotactl06 but only two differences
1) use quotactl and quotactl_fd syscalls without visible quota file
2) remove some error for addr argument

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 runtest/syscalls                              |   1 +
 testcases/kernel/syscalls/quotactl/.gitignore |   1 +
 .../kernel/syscalls/quotactl/quotactl09.c     | 180 ++++++++++++++++++
 3 files changed, 182 insertions(+)
 create mode 100644 testcases/kernel/syscalls/quotactl/quotactl09.c

diff --git a/runtest/syscalls b/runtest/syscalls
index c795b9101..13a62e4a1 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1072,6 +1072,7 @@ quotactl05 quotactl05
 quotactl06 quotactl06
 quotactl07 quotactl07
 quotactl08 quotactl08
+quotactl09 quotactl09
 
 read01 read01
 read02 read02
diff --git a/testcases/kernel/syscalls/quotactl/.gitignore b/testcases/kernel/syscalls/quotactl/.gitignore
index dab9b3420..94de2c8f2 100644
--- a/testcases/kernel/syscalls/quotactl/.gitignore
+++ b/testcases/kernel/syscalls/quotactl/.gitignore
@@ -6,3 +6,4 @@
 /quotactl06
 /quotactl07
 /quotactl08
+/quotactl09
diff --git a/testcases/kernel/syscalls/quotactl/quotactl09.c b/testcases/kernel/syscalls/quotactl/quotactl09.c
new file mode 100644
index 000000000..c7c485077
--- /dev/null
+++ b/testcases/kernel/syscalls/quotactl/quotactl09.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021 FUJITSU LIMITED. All rights reserved.
+ * Author: Yang Xu <xuyang2018.jy@fujitsu.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Tests basic error handling of the quotactl syscall without visible quota files
+ * (use quotactl and quotactl_fd syscall):
+ *
+ * - EFAULT when addr or special is invalid
+ * - EINVAL when cmd or type is invalid
+ * - ENOTBLK when special is not a block device
+ * - ERANGE when cmd is Q_SETQUOTA, but the specified limits are out of the range
+ *   allowed by the quota format
+ * - EPERM when the caller lacked the required privilege (CAP_SYS_ADMIN) for the
+ *   specified operation
+ *
+ * Minimum e2fsprogs version required is 1.43.
+ */
+
+#include <errno.h>
+#include <sys/quota.h>
+#include "tst_test.h"
+#include "tst_capability.h"
+#include "quotactl_syscall_var.h"
+
+#define OPTION_INVALID 999
+
+static int32_t fmt_id = QFMT_VFS_V1;
+static int test_id, mount_flag;
+static int getnextquota_nsup;
+
+static struct if_nextdqblk res_ndq;
+
+static struct dqblk set_dqmax = {
+	.dqb_bsoftlimit = 0x7fffffffffffffffLL,  /* 2^63-1 */
+	.dqb_valid = QIF_BLIMITS
+};
+
+static struct tst_cap dropadmin = {
+	.action = TST_CAP_DROP,
+	.id = CAP_SYS_ADMIN,
+	.name = "CAP_SYS_ADMIN",
+};
+
+static struct tst_cap needadmin = {
+	.action = TST_CAP_REQ,
+	.id = CAP_SYS_ADMIN,
+	.name = "CAP_SYS_ADMIN",
+};
+
+static struct tcase {
+	int cmd;
+	int *id;
+	void *addr;
+	int exp_err;
+	int on_flag;
+} tcases[] = {
+	{QCMD(Q_SETQUOTA, USRQUOTA), &fmt_id, NULL, EFAULT, 1},
+	{QCMD(OPTION_INVALID, USRQUOTA), &fmt_id, NULL, EINVAL, 0},
+	{QCMD(Q_QUOTAON, USRQUOTA), &fmt_id, NULL, ENOTBLK, 0},
+	{QCMD(Q_SETQUOTA, USRQUOTA), &test_id, &set_dqmax, ERANGE, 1},
+	{QCMD(Q_QUOTAON, USRQUOTA), &fmt_id, NULL, EPERM, 0},
+};
+
+static void verify_quotactl(unsigned int n)
+{
+	struct tcase *tc = &tcases[n];
+	int quota_on = 0;
+	int drop_flag = 0;
+
+	if (tc->cmd == QCMD(Q_GETNEXTQUOTA, USRQUOTA) && getnextquota_nsup) {
+		tst_res(TCONF, "current system doesn't support Q_GETNEXTQUOTA");
+		return;
+	}
+
+	if (tc->on_flag) {
+		TEST(do_quotactl(fd, QCMD(Q_QUOTAON, USRQUOTA), tst_device->dev,
+			fmt_id, NULL));
+		if (TST_RET == -1)
+			tst_brk(TBROK,
+				"quotactl with Q_QUOTAON returned %ld", TST_RET);
+		quota_on = 1;
+	}
+
+	if (tc->exp_err == EPERM) {
+		tst_cap_action(&dropadmin);
+		drop_flag = 1;
+	}
+
+	if (tst_variant) {
+		if (tc->exp_err == ENOTBLK) {
+			tst_res(TCONF, "quotactl_fd() doesn't have this error, skip");
+			return;
+		}
+	}
+	if (tc->exp_err == ENOTBLK)
+		TEST(do_quotactl(fd, tc->cmd, "/dev/null", *tc->id, tc->addr));
+	else
+		TEST(do_quotactl(fd, tc->cmd, tst_device->dev, *tc->id, tc->addr));
+
+	if (TST_RET == -1) {
+		if (tc->exp_err == TST_ERR) {
+			tst_res(TPASS | TTERRNO, "quotactl failed as expected");
+		} else {
+			tst_res(TFAIL | TTERRNO,
+				"quotactl failed unexpectedly; expected %s, but got",
+				tst_strerrno(tc->exp_err));
+		}
+	} else {
+		tst_res(TFAIL, "quotactl returned wrong value: %ld", TST_RET);
+	}
+
+	if (quota_on) {
+		TEST(do_quotactl(fd, QCMD(Q_QUOTAOFF, USRQUOTA), tst_device->dev,
+			fmt_id, NULL));
+		if (TST_RET == -1)
+			tst_brk(TBROK,
+				"quotactl with Q_QUOTAOFF returned %ld", TST_RET);
+		quota_on = 0;
+	}
+
+	if (drop_flag) {
+		tst_cap_action(&needadmin);
+		drop_flag = 0;
+	}
+}
+
+static void setup(void)
+{
+	unsigned int i;
+	const char *const fs_opts[] = { "-O quota", NULL};
+
+	quotactl_info();
+	SAFE_MKFS(tst_device->dev, tst_device->fs_type, fs_opts, NULL);
+	SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
+	mount_flag = 1;
+
+	fd = SAFE_OPEN(MNTPOINT, O_RDONLY);
+	TEST(do_quotactl(fd, QCMD(Q_GETNEXTQUOTA, USRQUOTA), tst_device->dev,
+		test_id, (void *) &res_ndq));
+	if (TST_ERR == EINVAL || TST_ERR == ENOSYS)
+		getnextquota_nsup = 1;
+
+	for (i = 0; i < ARRAY_SIZE(tcases); i++) {
+		if (!tcases[i].addr)
+			tcases[i].addr = tst_get_bad_addr(NULL);
+	}
+}
+
+static void cleanup(void)
+{
+	if (fd > -1)
+		SAFE_CLOSE(fd);
+	if (mount_flag && tst_umount(MNTPOINT))
+		tst_res(TWARN | TERRNO, "umount(%s)", MNTPOINT);
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.cleanup = cleanup,
+	.needs_kconfigs = (const char *[]) {
+		"CONFIG_QFMT_V2",
+		NULL
+	},
+	.tcnt = ARRAY_SIZE(tcases),
+	.test = verify_quotactl,
+	.dev_fs_type = "ext4",
+	.mntpoint = MNTPOINT,
+	.needs_device = 1,
+	.needs_root = 1,
+	.test_variants = QUOTACTL_SYSCALL_VARIANTS,
+	.needs_cmds = (const char *[]) {
+		"mkfs.ext4 >= 1.43.0",
+		NULL
+	}
+};
-- 
2.23.0