[LTP] [PATCH v6 1/3] syscalls/quotactl09: Test error when quota info hidden in filesystem

[xuyang2018.jy@fujitsu.com]

Hi Cyril
> Hi!
>> +/*\
>> + * [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
>> + * - EINVAL when cmd is Q_QUOTAON, but the fd refers to a regular file(doesn't
>> + *   under this moutpoint)
>> + *
>> + * 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, external_fd = -1;
>> +
>> +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;
>> +	int use_external_fd;
>> +	char *des;
>> +} tcases[] = {
>> +	{QCMD(Q_SETQUOTA, USRQUOTA),&fmt_id, NULL, EFAULT, 1, 0,
>> +	"EFAULT when addr or special is invalid"},
>> +
>> +	{QCMD(OPTION_INVALID, USRQUOTA),&fmt_id, NULL, EINVAL, 0, 0,
>> +	"EINVAL when cmd or type is invalid"},
>> +
>> +	{QCMD(Q_QUOTAON, USRQUOTA),&fmt_id, NULL, ENOTBLK, 0, 0,
>> +	"ENOTBLK when special is not a block device"},
>> +
>> +	{QCMD(Q_SETQUOTA, USRQUOTA),&test_id,&set_dqmax, ERANGE, 1, 0,
>> +	"ERANGE when cmd is Q_SETQUOTA, but the specified limits are out of the range"},
>> +
>> +	{QCMD(Q_QUOTAON, USRQUOTA),&fmt_id, NULL, EPERM, 0, 0,
>> +	"EPERM when the caller lacked the required privilege for specified operations"},
>> +
>> +	{QCMD(Q_QUOTAON, USRQUOTA),&fmt_id, NULL, EINVAL, 0, 1,
>> +	"EINVAL when cmd is Q_QUOTAON, but the fd refers to a regular file(doesn't under "
>> +	"this mountpoint)"}
>> +};
>> +
>> +static void verify_quotactl(unsigned int n)
>> +{
>> +	struct tcase *tc =&tcases[n];
>> +	int quota_on = 0;
>> +	int drop_flag = 0;
>> +
>> +	tst_res(TINFO, "Testing %s", tc->des);
>> +	if (tc->cmd == QCMD(Q_GETNEXTQUOTA, USRQUOTA)&&  getnextquota_nsup) {
>> +		tst_res(TCONF, "current system doesn't support Q_GETNEXTQUOTA");
>> +		return;
>> +	}
>> +
>> +	if (tc->on_flag) {
>> +		TST_EXP_PASS_SILENT(do_quotactl(fd, QCMD(Q_QUOTAON, USRQUOTA), tst_device->dev,
>> +			fmt_id, NULL), "do_quotactl(QCMD(Q_QUOTAON, USRQUOTA))");
>> +		if (!TST_PASS)
>> +			return;
>> +		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;
>> +		}
>> +	} else {
>> +		if (tc->use_external_fd) {
>> +			tst_res(TCONF, "quotactl() doesn't use fd, skip");
>> +			return;
>> +		}
>> +	}
>> +	if (tc->exp_err == ENOTBLK)
>> +		TST_EXP_FAIL(do_quotactl(fd, tc->cmd, "/dev/null", *tc->id, tc->addr),
>> +			ENOTBLK, "do_quotactl()");
>> +	else
>> +		TST_EXP_FAIL(do_quotactl(tc->use_external_fd ? external_fd : fd, tc->cmd,
>> +			tst_device->dev, *tc->id, tc->addr), tc->exp_err, "do_quotactl()");
>> +
>> +	if (quota_on) {
>> +		TST_EXP_PASS_SILENT(do_quotactl(fd, QCMD(Q_QUOTAOFF, USRQUOTA), tst_device->dev,
>> +			fmt_id, NULL), "do_quotactl(QCMD(Q_QUOTAOFF, USRQUOTA)");
>> +		if (!TST_PASS)
>> +			return;
>> +		quota_on = 0;
>
> There is no need to clear this flag.
Yes, good catch, will also remove this in quotactl06.c.
>
>> +	}
>> +
>> +	if (drop_flag) {
>> +		tst_cap_action(&needadmin);
>> +		drop_flag = 0;
>
> And this flag.
>
>> +	}
>> +}
>> +
>> +static void setup(void)
>> +{
>> +	unsigned int i;
>> +	const char *const fs_opts[] = { "-O quota", NULL};
>> +
>> +	quotactl_info();
>> +	external_fd = SAFE_CREAT("testfile", O_RDONLY);
>> +
>> +	SAFE_MKFS(tst_device->dev, tst_device->fs_type, fs_opts, NULL);
>> +	SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
>
> Why don't we pass the fs_opts in tst_test instead and use .mount_device = 1?
The code is pasted from quotactl06.c there use 
tst_require_quota_support. Here we don't use it, so we can use 
.mount_device directly.

Best Regards
Yang Xu
>
> Should be as easy as:
>
> static struct tst_test test = {
> 	...
> 	.dev_fs_opts = (const char *const []){"-O quota", NULL},
> 	.mount_device = 1,
> 	...
> };
>
> Or is there a reason why this wouldn't work?
>
>
> With the changes outlined in the other email and the minor issues I've
> pointed out here fixed:
>
> Reviewed-by: Cyril Hrubis<chrubis@suse.cz>

>
>