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minix/test/blocktest/blocktest.c
David van Moolenbroek 2e26c872c4 blocktest: make fewer assumptions about driver 
In particular, allow partial results to be returned in some cases,
and do not require that the driver fail on word-unaligned access.
2012-10-15 11:50:59 +00:00

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/* Block Device Driver Test driver, by D.C. van Moolenbroek */
#include <stdlib.h>
#include <minix/blockdriver.h>
#include <minix/drvlib.h>
#include <minix/ds.h>
#include <minix/optset.h>
#include <sys/ioc_disk.h>
#include <assert.h>
enum {
RESULT_OK, /* exactly as expected */
RESULT_DEATH, /* driver died */
RESULT_COMMFAIL, /* communication failed */
RESULT_BADTYPE, /* bad type in message */
RESULT_BADID, /* bad request ID in message */
RESULT_BADSTATUS, /* bad/unexpected status in message */
RESULT_TRUNC, /* request truncated unexpectedly */
RESULT_CORRUPT, /* buffer touched erroneously */
RESULT_MISSING, /* buffer left untouched erroneously */
RESULT_OVERFLOW, /* area around buffer touched */
RESULT_BADVALUE /* bad/unexpected return value */
};
typedef struct {
int type;
ssize_t value;
} result_t;
static char driver_label[32] = ""; /* driver DS label */
static dev_t driver_minor = -1; /* driver's partition minor to use */
static endpoint_t driver_endpt; /* driver endpoint */
static int may_write = FALSE; /* may we write to the device? */
static int sector_size = 512; /* size of a single disk sector */
static int min_read = 512; /* minimum total size of read req */
static int element_size = 512; /* minimum I/O vector element size */
static int max_size = 131072; /* maximum total size of any req */
/* Note that we do not test exceeding the max_size limit, so it is safe to set
* it to a value lower than the driver supports.
*/
static struct partition part; /* base and size of target partition */
#define NR_OPENED 10 /* maximum number of opened devices */
static dev_t opened[NR_OPENED]; /* list of currently opened devices */
static int nr_opened = 0; /* current number of opened devices */
static int total_tests = 0; /* total number of tests performed */
static int failed_tests = 0; /* number of tests that failed */
static int failed_groups = 0; /* nr of groups that had failures */
static int group_failure; /* has this group had a failure yet? */
static int driver_deaths = 0; /* number of restarts that we saw */
/* Options supported by this driver. */
static struct optset optset_table[] = {
{ "label", OPT_STRING, driver_label, sizeof(driver_label) },
{ "minor", OPT_INT, &driver_minor, 10 },
{ "rw", OPT_BOOL, &may_write, TRUE },
{ "ro", OPT_BOOL, &may_write, FALSE },
{ "sector", OPT_INT, &sector_size, 10 },
{ "element", OPT_INT, &element_size, 10 },
{ "min_read", OPT_INT, &min_read, 10 },
{ "max", OPT_INT, &max_size, 10 },
{ NULL, 0, NULL, 0 }
};
static int set_result(result_t *res, int type, ssize_t value)
{
/* Set the result to the given result type and with the given optional
* extra value. Return the type.
*/
res->type = type;
res->value = value;
return type;
}
static int accept_result(result_t *res, int type, ssize_t value)
{
/* If the result is of the given type and value, reset it to a success
* result. This allows for a logical OR on error codes. Return whether
* the result was indeed reset.
*/
if (res->type == type && res->value == value) {
set_result(res, RESULT_OK, 0);
return TRUE;
}
return FALSE;
}
static void got_result(result_t *res, char *desc)
{
/* Process the result of a test. Keep statistics.
*/
static int i = 0;
total_tests++;
if (res->type != RESULT_OK) {
failed_tests++;
if (group_failure == FALSE) {
failed_groups++;
group_failure = TRUE;
}
}
printf("#%02d: %-38s\t[%s]\n", ++i, desc,
(res->type == RESULT_OK) ? "PASS" : "FAIL");
switch (res->type) {
case RESULT_DEATH:
printf("- driver died\n");
break;
case RESULT_COMMFAIL:
printf("- communication failed; sendrec returned %d\n",
res->value);
break;
case RESULT_BADTYPE:
printf("- bad type %d in reply message\n", res->value);
break;
case RESULT_BADID:
printf("- mismatched ID %d in reply message\n", res->value);
break;
case RESULT_BADSTATUS:
printf("- bad or unexpected status %d in reply message\n",
res->value);
break;
case RESULT_TRUNC:
printf("- result size not as expected (%u bytes left)\n",
res->value);
break;
case RESULT_CORRUPT:
printf("- buffer has been modified erroneously\n");
break;
case RESULT_MISSING:
printf("- buffer has been left untouched erroneously\n");
break;
case RESULT_OVERFLOW:
printf("- area around target buffer modified\n");
break;
case RESULT_BADVALUE:
printf("- bad or unexpected return value %d from call\n",
res->value);
break;
}
}
static void test_group(char *name, int exec)
{
/* Start a new group of tests.
*/
printf("Test group: %s%s\n", name, exec ? "" : " (skipping)");
group_failure = FALSE;
}
static void reopen_device(dev_t minor)
{
/* Reopen a device after we were notified that the driver has died.
* Explicitly ignore any errors here; this is a feeble attempt to get
* ourselves back into business again.
*/
message m;
memset(&m, 0, sizeof(m));
m.m_type = BDEV_OPEN;
m.BDEV_MINOR = minor;
m.BDEV_ACCESS = (may_write) ? (R_BIT | W_BIT) : R_BIT;
m.BDEV_ID = 0;
(void) sendrec(driver_endpt, &m);
}
static int sendrec_driver(message *m_ptr, ssize_t exp, result_t *res)
{
/* Make a call to the driver, and perform basic checks on the return
* message. Fill in the result structure, wiping out what was in there
* before. If the driver dies in the process, attempt to recover but
* fail the request.
*/
message m_orig;
endpoint_t last_endpt;
int i, r;
m_orig = *m_ptr;
r = sendrec(driver_endpt, m_ptr);
if (r == EDEADSRCDST) {
/* The driver has died. Find its new endpoint, and reopen all
* devices that we opened earlier. Then return failure.
*/
printf("WARNING: driver has died, attempting to proceed\n");
driver_deaths++;
/* Keep trying until we get a new endpoint. */
last_endpt = driver_endpt;
for (;;) {
r = ds_retrieve_label_endpt(driver_label,
&driver_endpt);
if (r == OK && last_endpt != driver_endpt)
break;
micro_delay(100000);
}
for (i = 0; i < nr_opened; i++)
reopen_device(opened[i]);
return set_result(res, RESULT_DEATH, 0);
}
if (r != OK)
return set_result(res, RESULT_COMMFAIL, r);
if (m_ptr->m_type != BDEV_REPLY)
return set_result(res, RESULT_BADTYPE, m_ptr->m_type);
if (m_ptr->BDEV_ID != m_orig.BDEV_ID)
return set_result(res, RESULT_BADID, m_ptr->BDEV_ID);
if ((exp < 0 && m_ptr->BDEV_STATUS >= 0) ||
(exp >= 0 && m_ptr->BDEV_STATUS < 0))
return set_result(res, RESULT_BADSTATUS, m_ptr->BDEV_STATUS);
return set_result(res, RESULT_OK, 0);
}
static void raw_xfer(dev_t minor, u64_t pos, iovec_s_t *iovec, int nr_req,
int write, ssize_t exp, result_t *res)
{
/* Perform a transfer with a safecopy iovec already supplied.
*/
cp_grant_id_t grant;
message m;
int r;
assert(nr_req <= NR_IOREQS);
assert(!write || may_write);
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) iovec,
sizeof(*iovec) * nr_req, CPF_READ)) == GRANT_INVALID)
panic("unable to allocate grant");
memset(&m, 0, sizeof(m));
m.m_type = write ? BDEV_SCATTER : BDEV_GATHER;
m.BDEV_MINOR = minor;
m.BDEV_POS_LO = ex64lo(pos);
m.BDEV_POS_HI = ex64hi(pos);
m.BDEV_COUNT = nr_req;
m.BDEV_GRANT = grant;
m.BDEV_ID = lrand48();
r = sendrec_driver(&m, exp, res);
if (cpf_revoke(grant) != OK)
panic("unable to revoke grant");
if (r != RESULT_OK)
return;
if (m.BDEV_STATUS == exp)
return;
if (exp < 0)
set_result(res, RESULT_BADSTATUS, m.BDEV_STATUS);
else
set_result(res, RESULT_TRUNC, exp - m.BDEV_STATUS);
}
static void vir_xfer(dev_t minor, u64_t pos, iovec_t *iovec, int nr_req,
int write, ssize_t exp, result_t *res)
{
/* Perform a transfer, creating and revoking grants for the I/O vector.
*/
iovec_s_t iov_s[NR_IOREQS];
int i;
assert(nr_req <= NR_IOREQS);
for (i = 0; i < nr_req; i++) {
iov_s[i].iov_size = iovec[i].iov_size;
if ((iov_s[i].iov_grant = cpf_grant_direct(driver_endpt,
(vir_bytes) iovec[i].iov_addr, iovec[i].iov_size,
write ? CPF_READ : CPF_WRITE)) == GRANT_INVALID)
panic("unable to allocate grant");
}
raw_xfer(minor, pos, iov_s, nr_req, write, exp, res);
for (i = 0; i < nr_req; i++) {
iovec[i].iov_size = iov_s[i].iov_size;
if (cpf_revoke(iov_s[i].iov_grant) != OK)
panic("unable to revoke grant");
}
}
static void simple_xfer(dev_t minor, u64_t pos, u8_t *buf, size_t size,
int write, ssize_t exp, result_t *res)
{
/* Perform a transfer involving a single buffer.
*/
iovec_t iov;
iov.iov_addr = (vir_bytes) buf;
iov.iov_size = size;
vir_xfer(minor, pos, &iov, 1, write, exp, res);
}
static void alloc_buf_and_grant(u8_t **ptr, cp_grant_id_t *grant,
size_t size, int perms)
{
/* Allocate a buffer suitable for DMA (i.e. contiguous) and create a
* grant for it with the requested CPF_* grant permissions.
*/
*ptr = alloc_contig(size, 0, NULL);
if (*ptr == NULL)
panic("unable to allocate memory");
if ((*grant = cpf_grant_direct(driver_endpt, (vir_bytes) *ptr, size,
perms)) == GRANT_INVALID)
panic("unable to allocate grant");
}
static void free_buf_and_grant(u8_t *ptr, cp_grant_id_t grant, size_t size)
{
/* Revoke a grant and free a buffer.
*/
cpf_revoke(grant);
free_contig(ptr, size);
}
static void bad_read1(void)
{
/* Test various illegal read transfer requests, part 1.
*/
message mt, m;
iovec_s_t iovt, iov;
cp_grant_id_t grant, grant2, grant3;
u8_t *buf_ptr;
vir_bytes buf_size;
result_t res;
test_group("bad read requests, part one", TRUE);
#define BUF_SIZE 4096
buf_size = BUF_SIZE;
alloc_buf_and_grant(&buf_ptr, &grant2, buf_size, CPF_WRITE);
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) &iov,
sizeof(iov), CPF_READ)) == GRANT_INVALID)
panic("unable to allocate grant");
/* Initialize the defaults for some of the tests.
* This is a legitimate request for the first block of the partition.
*/
memset(&mt, 0, sizeof(mt));
mt.m_type = BDEV_GATHER;
mt.BDEV_MINOR = driver_minor;
mt.BDEV_POS_LO = 0L;
mt.BDEV_POS_HI = 0L;
mt.BDEV_COUNT = 1;
mt.BDEV_GRANT = grant;
mt.BDEV_ID = lrand48();
memset(&iovt, 0, sizeof(iovt));
iovt.iov_grant = grant2;
iovt.iov_size = buf_size;
/* Test normal request. */
m = mt;
iov = iovt;
sendrec_driver(&m, OK, &res);
if (res.type == RESULT_OK && m.BDEV_STATUS != (ssize_t) iov.iov_size) {
res.type = RESULT_TRUNC;
res.value = m.BDEV_STATUS;
}
got_result(&res, "normal request");
/* Test zero iovec elements. */
m = mt;
iov = iovt;
m.BDEV_COUNT = 0;
sendrec_driver(&m, EINVAL, &res);
got_result(&res, "zero iovec elements");
/* Test bad iovec grant. */
m = mt;
m.BDEV_GRANT = GRANT_INVALID;
sendrec_driver(&m, EINVAL, &res);
got_result(&res, "bad iovec grant");
/* Test revoked iovec grant. */
m = mt;
iov = iovt;
if ((grant3 = cpf_grant_direct(driver_endpt, (vir_bytes) &iov,
sizeof(iov), CPF_READ)) == GRANT_INVALID)
panic("unable to allocate grant");
cpf_revoke(grant3);
m.BDEV_GRANT = grant3;
sendrec_driver(&m, EINVAL, &res);
accept_result(&res, RESULT_BADSTATUS, EPERM);
got_result(&res, "revoked iovec grant");
/* Test normal request (final check). */
m = mt;
iov = iovt;
sendrec_driver(&m, OK, &res);
if (res.type == RESULT_OK && m.BDEV_STATUS != (ssize_t) iov.iov_size) {
res.type = RESULT_TRUNC;
res.value = m.BDEV_STATUS;
}
got_result(&res, "normal request");
/* Clean up. */
free_buf_and_grant(buf_ptr, grant2, buf_size);
cpf_revoke(grant);
}
static u32_t get_sum(u8_t *ptr, size_t size)
{
/* Compute a checksum over the given buffer.
*/
u32_t sum;
for (sum = 0; size > 0; size--, ptr++)
sum = sum ^ (sum << 5) ^ *ptr;
return sum;
}
static u32_t fill_rand(u8_t *ptr, size_t size)
{
/* Fill the given buffer with random data. Return a checksum over the
* resulting data.
*/
size_t i;
for (i = 0; i < size; i++)
ptr[i] = lrand48() % 256;
return get_sum(ptr, size);
}
static void test_sum(u8_t *ptr, size_t size, u32_t sum, int should_match,
result_t *res)
{
/* If the test succeeded so far, check whether the given buffer does
* or does not match the given checksum, and adjust the test result
* accordingly.
*/
u32_t sum2;
if (res->type != RESULT_OK)
return;
sum2 = get_sum(ptr, size);
if ((sum == sum2) != should_match) {
res->type = should_match ? RESULT_CORRUPT : RESULT_MISSING;
res->value = 0; /* not much that's useful here */
}
}
static void bad_read2(void)
{
/* Test various illegal read transfer requests, part 2.
*
* Consider allowing this test to be run twice, with different buffer
* sizes. It appears that we can make at_wini misbehave by making the
* size exceed the per-operation size (128KB ?). On the other hand, we
* then need to start checking partition sizes, possibly.
*/
u8_t *buf_ptr, *buf2_ptr, *buf3_ptr, c1, c2;
size_t buf_size, buf2_size, buf3_size;
cp_grant_id_t buf_grant, buf2_grant, buf3_grant, grant;
u32_t buf_sum, buf2_sum, buf3_sum;
iovec_s_t iov[3], iovt[3];
result_t res;
test_group("bad read requests, part two", TRUE);
buf_size = buf2_size = buf3_size = BUF_SIZE;
alloc_buf_and_grant(&buf_ptr, &buf_grant, buf_size, CPF_WRITE);
alloc_buf_and_grant(&buf2_ptr, &buf2_grant, buf2_size, CPF_WRITE);
alloc_buf_and_grant(&buf3_ptr, &buf3_grant, buf3_size, CPF_WRITE);
iovt[0].iov_grant = buf_grant;
iovt[0].iov_size = buf_size;
iovt[1].iov_grant = buf2_grant;
iovt[1].iov_size = buf2_size;
iovt[2].iov_grant = buf3_grant;
iovt[2].iov_size = buf3_size;
/* Test normal vector request. */
memcpy(iov, iovt, sizeof(iovt));
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE,
buf_size + buf2_size + buf3_size, &res);
test_sum(buf_ptr, buf_size, buf_sum, FALSE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, FALSE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, FALSE, &res);
got_result(&res, "normal vector request");
/* Test zero sized iovec element. */
memcpy(iov, iovt, sizeof(iovt));
iov[1].iov_size = 0;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "zero size in iovec element");
/* Test negative sized iovec element. */
memcpy(iov, iovt, sizeof(iovt));
iov[1].iov_size = (vir_bytes) LONG_MAX + 1;
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "negative size in iovec element");
/* Test iovec with negative total size. */
memcpy(iov, iovt, sizeof(iovt));
iov[0].iov_size = LONG_MAX / 2 - 1;
iov[1].iov_size = LONG_MAX / 2 - 1;
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "negative total size");
/* Test iovec with wrapping total size. */
memcpy(iov, iovt, sizeof(iovt));
iov[0].iov_size = LONG_MAX - 1;
iov[1].iov_size = LONG_MAX - 1;
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "wrapping total size");
/* Test word-unaligned iovec element size. */
memcpy(iov, iovt, sizeof(iovt));
iov[1].iov_size--;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
c1 = buf2_ptr[buf2_size - 1];
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, BUF_SIZE * 3 - 1,
&res);
if (accept_result(&res, RESULT_BADSTATUS, EINVAL)) {
/* Do not test the first buffer, as it may contain a partial
* result.
*/
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
} else {
test_sum(buf_ptr, buf_size, buf_sum, FALSE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, FALSE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, FALSE, &res);
if (c1 != buf2_ptr[buf2_size - 1])
set_result(&res, RESULT_CORRUPT, 0);
}
got_result(&res, "word-unaligned size in iovec element");
/* Test invalid grant in iovec element. */
memcpy(iov, iovt, sizeof(iovt));
iov[1].iov_grant = GRANT_INVALID;
fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
/* Do not test the first buffer, as it may contain a partial result. */
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "invalid grant in iovec element");
/* Test revoked grant in iovec element. */
memcpy(iov, iovt, sizeof(iovt));
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) buf2_ptr,
buf2_size, CPF_WRITE)) == GRANT_INVALID)
panic("unable to allocate grant");
cpf_revoke(grant);
iov[1].iov_grant = grant;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
accept_result(&res, RESULT_BADSTATUS, EPERM);
/* Do not test the first buffer, as it may contain a partial result. */
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "revoked grant in iovec element");
/* Test read-only grant in iovec element. */
memcpy(iov, iovt, sizeof(iovt));
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) buf2_ptr,
buf2_size, CPF_READ)) == GRANT_INVALID)
panic("unable to allocate grant");
iov[1].iov_grant = grant;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, EINVAL, &res);
accept_result(&res, RESULT_BADSTATUS, EPERM);
/* Do not test the first buffer, as it may contain a partial result. */
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "read-only grant in iovec element");
cpf_revoke(grant);
/* Test word-unaligned iovec element buffer. */
memcpy(iov, iovt, sizeof(iovt));
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) (buf2_ptr + 1),
buf2_size - 2, CPF_WRITE)) == GRANT_INVALID)
panic("unable to allocate grant");
iov[1].iov_grant = grant;
iov[1].iov_size = buf2_size - 2;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
c1 = buf2_ptr[0];
c2 = buf2_ptr[buf2_size - 1];
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE, BUF_SIZE * 3 - 2,
&res);
if (accept_result(&res, RESULT_BADSTATUS, EINVAL)) {
/* Do not test the first buffer, as it may contain a partial
* result.
*/
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
} else {
test_sum(buf_ptr, buf_size, buf_sum, FALSE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, FALSE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, FALSE, &res);
if (c1 != buf2_ptr[0] || c2 != buf2_ptr[buf2_size - 1])
set_result(&res, RESULT_CORRUPT, 0);
}
got_result(&res, "word-unaligned buffer in iovec element");
cpf_revoke(grant);
/* Test word-unaligned position. */
memcpy(iov, iovt, sizeof(iovt));
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(1), iov, 3, FALSE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "word-unaligned position");
/* Test normal vector request (final check). */
memcpy(iov, iovt, sizeof(iovt));
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, FALSE,
buf_size + buf2_size + buf3_size, &res);
test_sum(buf_ptr, buf_size, buf_sum, FALSE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, FALSE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, FALSE, &res);
got_result(&res, "normal vector request");
/* Clean up. */
free_buf_and_grant(buf3_ptr, buf3_grant, buf3_size);
free_buf_and_grant(buf2_ptr, buf2_grant, buf2_size);
free_buf_and_grant(buf_ptr, buf_grant, buf_size);
}
#define SECTOR_UNALIGN 2 /* word-aligned and sector-unaligned */
static void bad_write(void)
{
/* Test various illegal write transfer requests, if writing is allowed.
* If handled correctly, these requests will not actually write data.
* However, the last test currently erroneously does end up writing.
*/
u8_t *buf_ptr, *buf2_ptr, *buf3_ptr;
size_t buf_size, buf2_size, buf3_size;
cp_grant_id_t buf_grant, buf2_grant, buf3_grant;
cp_grant_id_t grant;
u32_t buf_sum, buf2_sum, buf3_sum;
iovec_s_t iov[3], iovt[3];
result_t res;
test_group("bad write requests", may_write);
if (!may_write)
return;
buf_size = buf2_size = buf3_size = BUF_SIZE;
alloc_buf_and_grant(&buf_ptr, &buf_grant, buf_size, CPF_READ);
alloc_buf_and_grant(&buf2_ptr, &buf2_grant, buf2_size, CPF_READ);
alloc_buf_and_grant(&buf3_ptr, &buf3_grant, buf3_size, CPF_READ);
iovt[0].iov_grant = buf_grant;
iovt[0].iov_size = buf_size;
iovt[1].iov_grant = buf2_grant;
iovt[1].iov_size = buf2_size;
iovt[2].iov_grant = buf3_grant;
iovt[2].iov_size = buf3_size;
/* Test sector-unaligned write position. */
memcpy(iov, iovt, sizeof(iovt));
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(SECTOR_UNALIGN), iov, 3, TRUE, EINVAL,
&res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "sector-unaligned write position");
/* Test sector-unaligned write size. */
memcpy(iov, iovt, sizeof(iovt));
iov[1].iov_size -= SECTOR_UNALIGN;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, TRUE, EINVAL, &res);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "sector-unaligned write size");
/* Test write-only grant in iovec element. */
memcpy(iov, iovt, sizeof(iovt));
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) buf2_ptr,
buf2_size, CPF_WRITE)) == GRANT_INVALID)
panic("unable to allocate grant");
iov[1].iov_grant = grant;
buf_sum = fill_rand(buf_ptr, buf_size);
buf2_sum = fill_rand(buf2_ptr, buf2_size);
buf3_sum = fill_rand(buf3_ptr, buf3_size);
raw_xfer(driver_minor, cvu64(0), iov, 3, TRUE, EINVAL, &res);
accept_result(&res, RESULT_BADSTATUS, EPERM);
test_sum(buf_ptr, buf_size, buf_sum, TRUE, &res);
test_sum(buf2_ptr, buf2_size, buf2_sum, TRUE, &res);
test_sum(buf3_ptr, buf3_size, buf3_sum, TRUE, &res);
got_result(&res, "write-only grant in iovec element");
cpf_revoke(grant);
/* Clean up. */
free_buf_and_grant(buf3_ptr, buf3_grant, buf3_size);
free_buf_and_grant(buf2_ptr, buf2_grant, buf2_size);
free_buf_and_grant(buf_ptr, buf_grant, buf_size);
}
static void vector_and_large_sub(size_t small_size)
{
/* Check whether large vectored requests, and large single requests,
* succeed.
*/
size_t large_size, buf_size, buf2_size;
u8_t *buf_ptr, *buf2_ptr;
iovec_t iovec[NR_IOREQS];
u64_t base_pos;
result_t res;
int i;
base_pos = cvu64(sector_size);
large_size = small_size * NR_IOREQS;
buf_size = large_size + sizeof(u32_t) * 2;
buf2_size = large_size + sizeof(u32_t) * (NR_IOREQS + 1);
buf_ptr = alloc_contig(buf_size, 0, NULL);
buf2_ptr = alloc_contig(buf2_size, 0, NULL);
if (buf_ptr == NULL || buf2_ptr == NULL)
panic("unable to allocate memory");
/* The first buffer has one large chunk with dword-sized guards on each
* side. LPTR(n) points to the start of the nth small data chunk within
* the large chunk. The second buffer contains several small chunks. It
* has dword-sized guards before each chunk and after the last chunk.
* SPTR(n) points to the start of the nth small chunk.
*/
#define SPTR(n) (buf2_ptr + sizeof(u32_t) + (n) * (sizeof(u32_t) + small_size))
#define LPTR(n) (buf_ptr + sizeof(u32_t) + small_size * (n))
/* Write one large chunk, if writing is allowed. */
if (may_write) {
fill_rand(buf_ptr, buf_size); /* don't need the checksum */
iovec[0].iov_addr = (vir_bytes) (buf_ptr + sizeof(u32_t));
iovec[0].iov_size = large_size;
vir_xfer(driver_minor, base_pos, iovec, 1, TRUE, large_size,
&res);
got_result(&res, "large write");
}
/* Read back in many small chunks. If writing is not allowed, do not
* check checksums.
*/
for (i = 0; i < NR_IOREQS; i++) {
* (((u32_t *) SPTR(i)) - 1) = 0xDEADBEEFL + i;
iovec[i].iov_addr = (vir_bytes) SPTR(i);
iovec[i].iov_size = small_size;
}
* (((u32_t *) SPTR(i)) - 1) = 0xFEEDFACEL;
vir_xfer(driver_minor, base_pos, iovec, NR_IOREQS, FALSE, large_size,
&res);
if (res.type == RESULT_OK) {
for (i = 0; i < NR_IOREQS; i++) {
if (* (((u32_t *) SPTR(i)) - 1) != 0xDEADBEEFL + i)
set_result(&res, RESULT_OVERFLOW, 0);
}
if (* (((u32_t *) SPTR(i)) - 1) != 0xFEEDFACEL)
set_result(&res, RESULT_OVERFLOW, 0);
}
if (res.type == RESULT_OK && may_write) {
for (i = 0; i < NR_IOREQS; i++) {
test_sum(SPTR(i), small_size,
get_sum(LPTR(i), small_size), TRUE, &res);
}
}
got_result(&res, "vectored read");
/* Write new data in many small chunks, if writing is allowed. */
if (may_write) {
fill_rand(buf2_ptr, buf2_size); /* don't need the checksum */
for (i = 0; i < NR_IOREQS; i++) {
iovec[i].iov_addr = (vir_bytes) SPTR(i);
iovec[i].iov_size = small_size;
}
vir_xfer(driver_minor, base_pos, iovec, NR_IOREQS, TRUE,
large_size, &res);
got_result(&res, "vectored write");
}
/* Read back in one large chunk. If writing is allowed, the checksums
* must match the last write; otherwise, they must match the last read.
* In both cases, the expected content is in the second buffer.
*/
* (u32_t *) buf_ptr = 0xCAFEBABEL;
* (u32_t *) (buf_ptr + sizeof(u32_t) + large_size) = 0xDECAFBADL;
iovec[0].iov_addr = (vir_bytes) (buf_ptr + sizeof(u32_t));
iovec[0].iov_size = large_size;
vir_xfer(driver_minor, base_pos, iovec, 1, FALSE, large_size, &res);
if (res.type == RESULT_OK) {
if (* (u32_t *) buf_ptr != 0xCAFEBABEL)
set_result(&res, RESULT_OVERFLOW, 0);
if (* (u32_t *) (buf_ptr + sizeof(u32_t) + large_size) !=
0xDECAFBADL)
set_result(&res, RESULT_OVERFLOW, 0);
}
if (res.type == RESULT_OK) {
for (i = 0; i < NR_IOREQS; i++) {
test_sum(SPTR(i), small_size,
get_sum(LPTR(i), small_size), TRUE, &res);
}
}
got_result(&res, "large read");
#undef LPTR
#undef SPTR
/* Clean up. */
free_contig(buf2_ptr, buf2_size);
free_contig(buf_ptr, buf_size);
}
static void vector_and_large(void)
{
/* Check whether large vectored requests, and large single requests,
* succeed. These are request patterns commonly used by MFS and the
* filter driver, respectively. We try the same test twice: once with
* a common block size, and once to push against the max request size.
*/
size_t max_block;
/* Compute the largest sector multiple which, when multiplied by
* NR_IOREQS, is no more than the maximum transfer size. Note that if
* max_size is not a multiple of sector_size, we're not going up to the
* limit entirely this way.
*/
max_block = max_size / NR_IOREQS;
max_block -= max_block % sector_size;
#define COMMON_BLOCK_SIZE 4096
test_group("vector and large, common block", TRUE);
vector_and_large_sub(COMMON_BLOCK_SIZE);
if (max_block != COMMON_BLOCK_SIZE) {
test_group("vector and large, large block", TRUE);
vector_and_large_sub(max_block);
}
}
static void open_device(dev_t minor)
{
/* Open a partition or subpartition. Remember that it has been opened,
* so that we can reopen it later in the event of a driver crash.
*/
message m;
result_t res;
memset(&m, 0, sizeof(m));
m.m_type = BDEV_OPEN;
m.BDEV_MINOR = minor;
m.BDEV_ACCESS = may_write ? (R_BIT | W_BIT) : R_BIT;
m.BDEV_ID = lrand48();
sendrec_driver(&m, OK, &res);
/* We assume that this call is supposed to succeed. We pretend it
* always succeeds, so that close_device() won't get confused later.
*/
assert(nr_opened < NR_OPENED);
opened[nr_opened++] = minor;
got_result(&res, minor == driver_minor ? "opening the main partition" :
"opening a subpartition");
}
static void close_device(dev_t minor)
{
/* Close a partition or subpartition. Remove it from the list of opened
* devices.
*/
message m;
result_t res;
int i;
memset(&m, 0, sizeof(m));
m.m_type = BDEV_CLOSE;
m.BDEV_MINOR = minor;
m.BDEV_ID = lrand48();
sendrec_driver(&m, OK, &res);
assert(nr_opened > 0);
for (i = 0; i < nr_opened; i++) {
if (opened[i] == minor) {
opened[i] = opened[--nr_opened];
break;
}
}
got_result(&res, minor == driver_minor ? "closing the main partition" :
"closing a subpartition");
}
static int vir_ioctl(dev_t minor, int req, void *ptr, ssize_t exp,
result_t *res)
{
/* Perform an I/O control request, using a local buffer.
*/
cp_grant_id_t grant;
message m;
int r, perm;
assert(!_MINIX_IOCTL_BIG(req)); /* not supported */
perm = 0;
if (_MINIX_IOCTL_IOR(req)) perm |= CPF_WRITE;
if (_MINIX_IOCTL_IOW(req)) perm |= CPF_READ;
if ((grant = cpf_grant_direct(driver_endpt, (vir_bytes) ptr,
_MINIX_IOCTL_SIZE(req), perm)) == GRANT_INVALID)
panic("unable to allocate grant");
memset(&m, 0, sizeof(m));
m.m_type = BDEV_IOCTL;
m.BDEV_MINOR = minor;
m.BDEV_POS_LO = 0L;
m.BDEV_POS_HI = 0L;
m.BDEV_REQUEST = req;
m.BDEV_GRANT = grant;
m.BDEV_ID = lrand48();
r = sendrec_driver(&m, exp, res);
if (cpf_revoke(grant) != OK)
panic("unable to revoke grant");
return r;
}
static void misc_ioctl(void)
{
/* Test some ioctls.
*/
result_t res;
int openct;
test_group("test miscellaneous ioctls", TRUE);
/* Retrieve the main partition's base and size. Save for later. */
vir_ioctl(driver_minor, DIOCGETP, &part, OK, &res);
got_result(&res, "ioctl to get partition");
/* The other tests do not check whether there is sufficient room. */
if (res.type == RESULT_OK && cmp64u(part.size, max_size * 2) < 0)
printf("WARNING: small partition, some tests may fail\n");
/* Test retrieving global driver open count. */
openct = 0x0badcafe;
vir_ioctl(driver_minor, DIOCOPENCT, &openct, OK, &res);
/* We assume that we're the only client to the driver right now. */
if (res.type == RESULT_OK && openct != 1) {
res.type = RESULT_BADVALUE;
res.value = openct;
}
got_result(&res, "ioctl to get open count");
/* Test increasing and re-retrieving open count. */
open_device(driver_minor);
openct = 0x0badcafe;
vir_ioctl(driver_minor, DIOCOPENCT, &openct, OK, &res);
if (res.type == RESULT_OK && openct != 2) {
res.type = RESULT_BADVALUE;
res.value = openct;
}
got_result(&res, "increased open count after opening");
/* Test decreasing and re-retrieving open count. */
close_device(driver_minor);
openct = 0x0badcafe;
vir_ioctl(driver_minor, DIOCOPENCT, &openct, OK, &res);
if (res.type == RESULT_OK && openct != 1) {
res.type = RESULT_BADVALUE;
res.value = openct;
}
got_result(&res, "decreased open count after closing");
}
static void read_limits(dev_t sub0_minor, dev_t sub1_minor, size_t sub_size)
{
/* Test reads up to, across, and beyond partition limits.
*/
u8_t *buf_ptr;
size_t buf_size;
u32_t sum, sum2, sum3;
result_t res;
test_group("read around subpartition limits", TRUE);
buf_size = sector_size * 3;
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
/* Read one sector up to the partition limit. */
fill_rand(buf_ptr, buf_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
sector_size, FALSE, sector_size, &res);
sum = get_sum(buf_ptr, sector_size);
got_result(&res, "one sector read up to partition end");
/* Read three sectors up to the partition limit. */
fill_rand(buf_ptr, buf_size);
simple_xfer(sub0_minor, cvu64(sub_size - buf_size), buf_ptr, buf_size,
FALSE, buf_size, &res);
test_sum(buf_ptr + sector_size * 2, sector_size, sum, TRUE, &res);
sum2 = get_sum(buf_ptr + sector_size, sector_size * 2);
got_result(&res, "multisector read up to partition end");
/* Read three sectors, two up to and one beyond the partition end. */
fill_rand(buf_ptr, buf_size);
sum3 = get_sum(buf_ptr + sector_size * 2, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size * 2), buf_ptr,
buf_size, FALSE, sector_size * 2, &res);
test_sum(buf_ptr, sector_size * 2, sum2, TRUE, &res);
test_sum(buf_ptr + sector_size * 2, sector_size, sum3, TRUE, &res);
got_result(&res, "read somewhat across partition end");
/* Read three sectors, one up to and two beyond the partition end. */
fill_rand(buf_ptr, buf_size);
sum2 = get_sum(buf_ptr + sector_size, sector_size * 2);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
buf_size, FALSE, sector_size, &res);
test_sum(buf_ptr, sector_size, sum, TRUE, &res);
test_sum(buf_ptr + sector_size, sector_size * 2, sum2, TRUE, &res);
got_result(&res, "read mostly across partition end");
/* Read one sector starting at the partition end. */
sum = fill_rand(buf_ptr, buf_size);
sum2 = get_sum(buf_ptr, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size), buf_ptr, sector_size, FALSE,
0, &res);
test_sum(buf_ptr, sector_size, sum2, TRUE, &res);
got_result(&res, "one sector read at partition end");
/* Read three sectors starting at the partition end. */
simple_xfer(sub0_minor, cvu64(sub_size), buf_ptr, buf_size, FALSE, 0,
&res);
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
got_result(&res, "multisector read at partition end");
/* Read one sector beyond the partition end. */
simple_xfer(sub0_minor, cvu64(sub_size + sector_size), buf_ptr,
buf_size, FALSE, 0, &res);
test_sum(buf_ptr, sector_size, sum2, TRUE, &res);
got_result(&res, "single sector read beyond partition end");
/* Read three sectors way beyond the partition end. */
simple_xfer(sub0_minor, make64(0L, 0x10000000L), buf_ptr,
buf_size, FALSE, 0, &res);
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
/* Test negative offsets. This request should return EOF or fail; we
* assume that it return EOF here (because that is what the AHCI driver
* does, to avoid producing errors for requests close to the 2^64 byte
* position limit [yes, this will indeed never happen anyway]). This is
* more or less a bad requests test, but we cannot do it without
* setting up subpartitions first.
*/
simple_xfer(sub1_minor, make64(0xffffffffL - sector_size + 1,
0xffffffffL), buf_ptr, sector_size, FALSE, 0, &res);
test_sum(buf_ptr, sector_size, sum2, TRUE, &res);
got_result(&res, "read with negative offset");
/* Clean up. */
free_contig(buf_ptr, buf_size);
}
static void write_limits(dev_t sub0_minor, dev_t sub1_minor, size_t sub_size)
{
/* Test writes up to, across, and beyond partition limits. Use the
* first given subpartition to test, and the second to make sure there
* are no overruns. The given size is the size of each of the
* subpartitions. Note that the necessity to check the results using
* readback, makes this more or less a superset of the read test.
*/
u8_t *buf_ptr;
size_t buf_size;
u32_t sum, sum2, sum3, sub1_sum;
result_t res;
test_group("write around subpartition limits", may_write);
if (!may_write)
return;
buf_size = sector_size * 3;
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
/* Write to the start of the second subpartition, so that we can
* reliably check whether the contents have changed later.
*/
sub1_sum = fill_rand(buf_ptr, buf_size);
simple_xfer(sub1_minor, cvu64(0), buf_ptr, buf_size, TRUE, buf_size,
&res);
got_result(&res, "write to second subpartition");
/* Write one sector, up to the partition limit. */
sum = fill_rand(buf_ptr, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
sector_size, TRUE, sector_size, &res);
got_result(&res, "write up to partition end");
/* Read back to make sure the results have persisted. */
fill_rand(buf_ptr, sector_size * 2);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size * 2), buf_ptr,
sector_size * 2, FALSE, sector_size * 2, &res);
test_sum(buf_ptr + sector_size, sector_size, sum, TRUE, &res);
got_result(&res, "read up to partition end");
/* Write three sectors, two up to and one beyond the partition end. */
fill_rand(buf_ptr, buf_size);
sum = get_sum(buf_ptr + sector_size, sector_size);
sum3 = get_sum(buf_ptr, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size * 2), buf_ptr,
buf_size, TRUE, sector_size * 2, &res);
got_result(&res, "write somewhat across partition end");
/* Read three sectors, one up to and two beyond the partition end. */
fill_rand(buf_ptr, buf_size);
sum2 = get_sum(buf_ptr + sector_size, sector_size * 2);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
buf_size, FALSE, sector_size, &res);
test_sum(buf_ptr, sector_size, sum, TRUE, &res);
test_sum(buf_ptr + sector_size, sector_size * 2, sum2, TRUE, &res);
got_result(&res, "read mostly across partition end");
/* Repeat this but with write and read start positions swapped. */
fill_rand(buf_ptr, buf_size);
sum = get_sum(buf_ptr, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
buf_size, TRUE, sector_size, &res);
got_result(&res, "write mostly across partition end");
fill_rand(buf_ptr, buf_size);
sum2 = get_sum(buf_ptr + sector_size * 2, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size - sector_size * 2), buf_ptr,
buf_size, FALSE, sector_size * 2, &res);
test_sum(buf_ptr, sector_size, sum3, TRUE, &res);
test_sum(buf_ptr + sector_size, sector_size, sum, TRUE, &res);
test_sum(buf_ptr + sector_size * 2, sector_size, sum2, TRUE, &res);
got_result(&res, "read somewhat across partition end");
/* Write one sector at the end of the partition. */
fill_rand(buf_ptr, sector_size);
simple_xfer(sub0_minor, cvu64(sub_size), buf_ptr, sector_size, TRUE, 0,
&res);
got_result(&res, "write at partition end");
/* Write one sector beyond the end of the partition. */
simple_xfer(sub0_minor, cvu64(sub_size + sector_size), buf_ptr,
sector_size, TRUE, 0, &res);
got_result(&res, "write beyond partition end");
/* Read from the start of the second subpartition, and see if it
* matches what we wrote into it earlier.
*/
fill_rand(buf_ptr, buf_size);
simple_xfer(sub1_minor, cvu64(0), buf_ptr, buf_size, FALSE, buf_size,
&res);
test_sum(buf_ptr, buf_size, sub1_sum, TRUE, &res);
got_result(&res, "read from second subpartition");
/* Test offset wrapping, but this time for writes. */
fill_rand(buf_ptr, sector_size);
simple_xfer(sub1_minor, make64(0xffffffffL - sector_size + 1,
0xffffffffL), buf_ptr, sector_size, TRUE, 0, &res);
got_result(&res, "write with negative offset");
/* If the last request erroneously succeeded, it would have overwritten
* the last sector of the first subpartition.
*/
simple_xfer(sub0_minor, cvu64(sub_size - sector_size), buf_ptr,
sector_size, FALSE, sector_size, &res);
test_sum(buf_ptr, sector_size, sum, TRUE, &res);
got_result(&res, "read up to partition end");
/* Clean up. */
free_contig(buf_ptr, buf_size);
}
static void vir_limits(dev_t sub0_minor, dev_t sub1_minor, int part_secs)
{
/* Create virtual, temporary subpartitions through the DIOCSETP ioctl,
* and perform tests on the resulting subpartitions.
*/
struct partition subpart, subpart2;
size_t sub_size;
result_t res;
test_group("virtual subpartition limits", TRUE);
/* Open the subpartitions. This is somewhat dodgy; we rely on the
* driver allowing this even if no subpartitions exist. We cannot do
* this test without doing a DIOCSETP on an open subdevice, though.
*/
open_device(sub0_minor);
open_device(sub1_minor);
sub_size = sector_size * part_secs;
/* Set, and check, the size of the first subpartition. */
subpart = part;
subpart.size = cvu64(sub_size);
vir_ioctl(sub0_minor, DIOCSETP, &subpart, OK, &res);
got_result(&res, "ioctl to set first subpartition");
vir_ioctl(sub0_minor, DIOCGETP, &subpart2, OK, &res);
if (res.type == RESULT_OK && (cmp64(subpart.base, subpart2.base) ||
cmp64(subpart.size, subpart2.size))) {
res.type = RESULT_BADVALUE;
res.value = 0;
}
got_result(&res, "ioctl to get first subpartition");
/* Set, and check, the base and size of the second subpartition. */
subpart = part;
subpart.base = add64u(subpart.base, sub_size);
subpart.size = cvu64(sub_size);
vir_ioctl(sub1_minor, DIOCSETP, &subpart, OK, &res);
got_result(&res, "ioctl to set second subpartition");
vir_ioctl(sub1_minor, DIOCGETP, &subpart2, OK, &res);
if (res.type == RESULT_OK && (cmp64(subpart.base, subpart2.base) ||
cmp64(subpart.size, subpart2.size))) {
res.type = RESULT_BADVALUE;
res.value = 0;
}
got_result(&res, "ioctl to get second subpartition");
/* Perform the actual I/O tests. */
read_limits(sub0_minor, sub1_minor, sub_size);
write_limits(sub0_minor, sub1_minor, sub_size);
/* Clean up. */
close_device(sub1_minor);
close_device(sub0_minor);
}
static void real_limits(dev_t sub0_minor, dev_t sub1_minor, int part_secs)
{
/* Create our own subpartitions by writing a partition table, and
* perform tests on the resulting real subpartitions.
*/
u8_t *buf_ptr;
size_t buf_size, sub_size;
struct partition subpart;
struct part_entry *entry;
result_t res;
test_group("real subpartition limits", may_write);
if (!may_write)
return;
sub_size = sector_size * part_secs;
/* Technically, we should be using 512 instead of sector_size in
* various places, because even on CD-ROMs, the partition tables are
* 512 bytes and the sector counts are based on 512-byte sectors in it.
* We ignore this subtlety because CD-ROMs are assumed to be read-only
* anyway.
*/
buf_size = sector_size;
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
memset(buf_ptr, 0, buf_size);
/* Write an invalid partition table. */
simple_xfer(driver_minor, cvu64(0), buf_ptr, buf_size, TRUE, buf_size,
&res);
got_result(&res, "write of invalid partition table");
/* Get the disk driver to reread the partition table. This should
* happen (at least) when the device is fully closed and then reopened.
* The ioctl test already made sure that we're the only client.
*/
close_device(driver_minor);
open_device(driver_minor);
/* See if our changes are visible. We expect the subpartitions to have
* a size of zero now, indicating that they're not there. For actual
* subpartitions (as opposed to normal partitions), this requires the
* driver to zero them out, because the partition code does not do so.
*/
open_device(sub0_minor);
open_device(sub1_minor);
vir_ioctl(sub0_minor, DIOCGETP, &subpart, 0, &res);
if (res.type == RESULT_OK && cmp64u(subpart.size, 0)) {
res.type = RESULT_BADVALUE;
res.value = ex64lo(subpart.size);
}
got_result(&res, "ioctl to get first subpartition");
vir_ioctl(sub1_minor, DIOCGETP, &subpart, 0, &res);
if (res.type == RESULT_OK && cmp64u(subpart.size, 0)) {
res.type = RESULT_BADVALUE;
res.value = ex64lo(subpart.size);
}
got_result(&res, "ioctl to get second subpartition");
close_device(sub1_minor);
close_device(sub0_minor);
/* Now write a valid partition table. */
memset(buf_ptr, 0, buf_size);
entry = (struct part_entry *) &buf_ptr[PART_TABLE_OFF];
entry[0].sysind = MINIX_PART;
entry[0].lowsec = div64u(part.base, sector_size) + 1;
entry[0].size = part_secs;
entry[1].sysind = MINIX_PART;
entry[1].lowsec = entry[0].lowsec + entry[0].size;
entry[1].size = part_secs;
buf_ptr[510] = 0x55;
buf_ptr[511] = 0xAA;
simple_xfer(driver_minor, cvu64(0), buf_ptr, buf_size, TRUE, buf_size,
&res);
got_result(&res, "write of valid partition table");
/* Same as above. */
close_device(driver_minor);
open_device(driver_minor);
/* Again, see if our changes are visible. This time the proper base and
* size should be there.
*/
open_device(sub0_minor);
open_device(sub1_minor);
vir_ioctl(sub0_minor, DIOCGETP, &subpart, 0, &res);
if (res.type == RESULT_OK && (cmp64(subpart.base,
add64u(part.base, sector_size)) ||
cmp64u(subpart.size, part_secs * sector_size))) {
res.type = RESULT_BADVALUE;
res.value = 0;
}
got_result(&res, "ioctl to get first subpartition");
vir_ioctl(sub1_minor, DIOCGETP, &subpart, 0, &res);
if (res.type == RESULT_OK && (cmp64(subpart.base,
add64u(part.base, (1 + part_secs) * sector_size)) ||
cmp64u(subpart.size, part_secs * sector_size))) {
res.type = RESULT_BADVALUE;
res.value = 0;
}
got_result(&res, "ioctl to get second subpartition");
/* Now perform the actual I/O tests. */
read_limits(sub0_minor, sub1_minor, sub_size);
write_limits(sub0_minor, sub1_minor, sub_size);
/* Clean up. */
close_device(sub0_minor);
close_device(sub1_minor);
free_contig(buf_ptr, buf_size);
}
static void part_limits(void)
{
/* Test reads and writes up to, across, and beyond partition limits.
* As a side effect, test reading and writing partition sizes and
* rereading partition tables.
*/
dev_t par, sub0_minor, sub1_minor;
/* First determine the first two subpartitions of the partition that we
* are operating on. If we are already operating on a subpartition, we
* cannot conduct this test.
*/
if (driver_minor >= MINOR_d0p0s0) {
printf("WARNING: operating on subpartition, "
"skipping partition tests\n");
return;
}
par = driver_minor % DEV_PER_DRIVE;
if (par > 0) /* adapted from libdriver's drvlib code */
sub0_minor = MINOR_d0p0s0 + ((driver_minor / DEV_PER_DRIVE) *
NR_PARTITIONS + par - 1) * NR_PARTITIONS;
else
sub0_minor = driver_minor + 1;
sub1_minor = sub0_minor + 1;
#define PART_SECS 9 /* sectors in each partition. must be >= 4. */
/* First try the test with temporarily specified subpartitions. */
vir_limits(sub0_minor, sub1_minor, PART_SECS);
/* Then, if we're allowed to write, try the test with real, persisted
* subpartitions.
*/
real_limits(sub0_minor, sub1_minor, PART_SECS - 1);
}
static void unaligned_size_io(u64_t base_pos, u8_t *buf_ptr, size_t buf_size,
u8_t *sec_ptr[2], int sectors, int pattern, u32_t ssum[5])
{
/* Perform a single small-element I/O read, write, readback test.
* The number of sectors and the pattern varies with each call.
* The ssum array has to be updated to reflect the five sectors'
* checksums on disk, if writing is enabled. Note that for
*/
iovec_t iov[3], iovt[3];
u32_t rsum[3];
result_t res;
size_t total_size;
int i, nr_req;
base_pos = add64u(base_pos, sector_size);
total_size = sector_size * sectors;
/* If the limit is two elements per sector, we cannot test three
* elements in a single sector.
*/
if (sector_size / element_size == 2 && sectors == 1 && pattern == 2)
return;
/* Set up the buffers and I/O vector. We use different buffers for the
* elements to minimize the chance that something "accidentally" goes
* right, but that means we have to do memory copying to do checksum
* computation.
*/
fill_rand(sec_ptr[0], sector_size);
rsum[0] =
get_sum(sec_ptr[0] + element_size, sector_size - element_size);
fill_rand(buf_ptr, buf_size);
switch (pattern) {
case 0:
/* First pattern: a small element on the left. */
iovt[0].iov_addr = (vir_bytes) sec_ptr[0];
iovt[0].iov_size = element_size;
iovt[1].iov_addr = (vir_bytes) buf_ptr;
iovt[1].iov_size = total_size - element_size;
rsum[1] = get_sum(buf_ptr + iovt[1].iov_size, element_size);
nr_req = 2;
break;
case 1:
/* Second pattern: a small element on the right. */
iovt[0].iov_addr = (vir_bytes) buf_ptr;
iovt[0].iov_size = total_size - element_size;
rsum[1] = get_sum(buf_ptr + iovt[0].iov_size, element_size);
iovt[1].iov_addr = (vir_bytes) sec_ptr[0];
iovt[1].iov_size = element_size;
nr_req = 2;
break;
case 2:
/* Third pattern: a small element on each side. */
iovt[0].iov_addr = (vir_bytes) sec_ptr[0];
iovt[0].iov_size = element_size;
iovt[1].iov_addr = (vir_bytes) buf_ptr;
iovt[1].iov_size = total_size - element_size * 2;
rsum[1] = get_sum(buf_ptr + iovt[1].iov_size,
element_size * 2);
fill_rand(sec_ptr[1], sector_size);
iovt[2].iov_addr = (vir_bytes) sec_ptr[1];
iovt[2].iov_size = element_size;
rsum[2] = get_sum(sec_ptr[1] + element_size,
sector_size - element_size);
nr_req = 3;
break;
default:
assert(0);
}
/* Perform a read with small elements, and test whether the result is
* as expected.
*/
memcpy(iov, iovt, sizeof(iov));
vir_xfer(driver_minor, base_pos, iov, nr_req, FALSE, total_size, &res);
test_sum(sec_ptr[0] + element_size, sector_size - element_size,
rsum[0], TRUE, &res);
switch (pattern) {
case 0:
test_sum(buf_ptr + iovt[1].iov_size, element_size, rsum[1],
TRUE, &res);
memmove(buf_ptr + element_size, buf_ptr, iovt[1].iov_size);
memcpy(buf_ptr, sec_ptr[0], element_size);
break;
case 1:
test_sum(buf_ptr + iovt[0].iov_size, element_size, rsum[1],
TRUE, &res);
memcpy(buf_ptr + iovt[0].iov_size, sec_ptr[0], element_size);
break;
case 2:
test_sum(buf_ptr + iovt[1].iov_size, element_size * 2, rsum[1],
TRUE, &res);
test_sum(sec_ptr[1] + element_size, sector_size - element_size,
rsum[2], TRUE, &res);
memmove(buf_ptr + element_size, buf_ptr, iovt[1].iov_size);
memcpy(buf_ptr, sec_ptr[0], element_size);
memcpy(buf_ptr + element_size + iovt[1].iov_size, sec_ptr[1],
element_size);
break;
}
for (i = 0; i < sectors; i++)
test_sum(buf_ptr + sector_size * i, sector_size, ssum[1 + i],
TRUE, &res);
got_result(&res, "read with small elements");
/* In read-only mode, we have nothing more to do. */
if (!may_write)
return;
/* Use the same I/O vector to perform a write with small elements.
* This will cause the checksums of the target sectors to change,
* so we need to update those for both verification and later usage.
*/
for (i = 0; i < sectors; i++)
ssum[1 + i] =
fill_rand(buf_ptr + sector_size * i, sector_size);
switch (pattern) {
case 0:
memcpy(sec_ptr[0], buf_ptr, element_size);
memmove(buf_ptr, buf_ptr + element_size, iovt[1].iov_size);
fill_rand(buf_ptr + iovt[1].iov_size, element_size);
break;
case 1:
memcpy(sec_ptr[0], buf_ptr + iovt[0].iov_size, element_size);
fill_rand(buf_ptr + iovt[0].iov_size, element_size);
break;
case 2:
memcpy(sec_ptr[0], buf_ptr, element_size);
memcpy(sec_ptr[1], buf_ptr + element_size + iovt[1].iov_size,
element_size);
memmove(buf_ptr, buf_ptr + element_size, iovt[1].iov_size);
fill_rand(buf_ptr + iovt[1].iov_size, element_size * 2);
break;
}
memcpy(iov, iovt, sizeof(iov));
vir_xfer(driver_minor, base_pos, iov, nr_req, TRUE, total_size, &res);
got_result(&res, "write with small elements");
/* Now perform normal readback verification. */
fill_rand(buf_ptr, sector_size * 3);
simple_xfer(driver_minor, base_pos, buf_ptr, sector_size * 3, FALSE,
sector_size * 3, &res);
for (i = 0; i < 3; i++)
test_sum(buf_ptr + sector_size * i, sector_size, ssum[1 + i],
TRUE, &res);
got_result(&res, "readback verification");
}
static void unaligned_size(void)
{
/* Test sector-unaligned sizes in I/O vector elements. The total size
* of the request, however, has to add up to the sector size.
*/
u8_t *buf_ptr, *sec_ptr[2];
size_t buf_size;
u32_t sum = 0L, ssum[5];
u64_t base_pos;
result_t res;
int i;
test_group("sector-unaligned elements", sector_size != element_size);
/* We can only do this test if the driver allows small elements. */
if (sector_size == element_size)
return;
/* Crashing on bad user input, terrible! */
assert(sector_size % element_size == 0);
/* Establish a baseline by writing and reading back five sectors; or
* by reading only, if writing is disabled.
*/
buf_size = sector_size * 5;
base_pos = cvu64(sector_size * 2);
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if ((sec_ptr[0] = alloc_contig(sector_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if ((sec_ptr[1] = alloc_contig(sector_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if (may_write) {
sum = fill_rand(buf_ptr, buf_size);
for (i = 0; i < 5; i++)
ssum[i] = get_sum(buf_ptr + sector_size * i,
sector_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, TRUE,
buf_size, &res);
got_result(&res, "write several sectors");
}
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, FALSE, buf_size,
&res);
if (may_write) {
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
}
else {
for (i = 0; i < 5; i++)
ssum[i] = get_sum(buf_ptr + sector_size * i,
sector_size);
}
got_result(&res, "read several sectors");
/* We do nine subtests. The first three involve only the second sector;
* the second three involve the second and third sectors, and the third
* three involve all of the middle sectors. Each triplet tests small
* elements at the left, at the right, and at both the left and the
* right of the area. For each operation, we first do an unaligned
* read, and if writing is enabled, an unaligned write and an aligned
* read.
*/
for (i = 0; i < 9; i++) {
unaligned_size_io(base_pos, buf_ptr, buf_size, sec_ptr,
i / 3 + 1, i % 3, ssum);
}
/* If writing was enabled, make sure that the first and fifth sector
* have remained untouched.
*/
if (may_write) {
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, FALSE,
buf_size, &res);
test_sum(buf_ptr, sector_size, ssum[0], TRUE, &res);
test_sum(buf_ptr + sector_size * 4, sector_size, ssum[4], TRUE,
&res);
got_result(&res, "check first and last sectors");
}
/* Clean up. */
free_contig(sec_ptr[1], sector_size);
free_contig(sec_ptr[0], sector_size);
free_contig(buf_ptr, buf_size);
}
static void unaligned_pos1(void)
{
/* Test sector-unaligned positions and total sizes for requests. This
* is a read-only test as no driver currently supports sector-unaligned
* writes. In this context, the term "lead" means an unwanted first
* part of a sector, and "trail" means an unwanted last part of a
* sector.
*/
u8_t *buf_ptr, *buf2_ptr;
size_t buf_size, buf2_size, size;
u32_t sum, sum2;
u64_t base_pos;
result_t res;
test_group("sector-unaligned positions, part one",
min_read != sector_size);
/* We can only do this test if the driver allows small read requests.
*/
if (min_read == sector_size)
return;
assert(sector_size % min_read == 0);
assert(min_read % element_size == 0);
/* Establish a baseline by writing and reading back three sectors; or
* by reading only, if writing is disabled.
*/
buf_size = buf2_size = sector_size * 3;
base_pos = cvu64(sector_size * 3);
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if ((buf2_ptr = alloc_contig(buf2_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if (may_write) {
sum = fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, TRUE,
buf_size, &res);
got_result(&res, "write several sectors");
}
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, FALSE, buf_size,
&res);
if (may_write)
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
got_result(&res, "read several sectors");
/* Start with a simple test that operates within a single sector,
* first using a lead.
*/
fill_rand(buf2_ptr, sector_size);
sum = get_sum(buf2_ptr + min_read, sector_size - min_read);
simple_xfer(driver_minor, add64u(base_pos, sector_size - min_read),
buf2_ptr, min_read, FALSE, min_read, &res);
test_sum(buf2_ptr, min_read, get_sum(buf_ptr + sector_size - min_read,
min_read), TRUE, &res);
test_sum(buf2_ptr + min_read, sector_size - min_read, sum, TRUE,
&res);
got_result(&res, "single sector read with lead");
/* Then a trail. */
fill_rand(buf2_ptr, sector_size);
sum = get_sum(buf2_ptr, sector_size - min_read);
simple_xfer(driver_minor, base_pos, buf2_ptr + sector_size - min_read,
min_read, FALSE, min_read, &res);
test_sum(buf2_ptr + sector_size - min_read, min_read, get_sum(buf_ptr,
min_read), TRUE, &res);
test_sum(buf2_ptr, sector_size - min_read, sum, TRUE, &res);
got_result(&res, "single sector read with trail");
/* And then a lead and a trail, unless min_read is half the sector
* size, in which case this will be another lead test.
*/
fill_rand(buf2_ptr, sector_size);
sum = get_sum(buf2_ptr, min_read);
sum2 = get_sum(buf2_ptr + min_read * 2, sector_size - min_read * 2);
simple_xfer(driver_minor, add64u(base_pos, min_read),
buf2_ptr + min_read, min_read, FALSE, min_read, &res);
test_sum(buf2_ptr + min_read, min_read, get_sum(buf_ptr + min_read,
min_read), TRUE, &res);
test_sum(buf2_ptr, min_read, sum, TRUE, &res);
test_sum(buf2_ptr + min_read * 2, sector_size - min_read * 2, sum2,
TRUE, &res);
got_result(&res, "single sector read with lead and trail");
/* Now do the same but with three sectors, and still only one I/O
* vector element. First up: lead.
*/
size = min_read + sector_size * 2;
fill_rand(buf2_ptr, buf2_size);
sum = get_sum(buf2_ptr + size, buf2_size - size);
simple_xfer(driver_minor, add64u(base_pos, sector_size - min_read),
buf2_ptr, size, FALSE, size, &res);
test_sum(buf2_ptr, size, get_sum(buf_ptr + sector_size - min_read,
size), TRUE, &res);
test_sum(buf2_ptr + size, buf2_size - size, sum, TRUE, &res);
got_result(&res, "multisector read with lead");
/* Then trail. */
fill_rand(buf2_ptr, buf2_size);
sum = get_sum(buf2_ptr + size, buf2_size - size);
simple_xfer(driver_minor, base_pos, buf2_ptr, size, FALSE, size, &res);
test_sum(buf2_ptr, size, get_sum(buf_ptr, size), TRUE, &res);
test_sum(buf2_ptr + size, buf2_size - size, sum, TRUE, &res);
got_result(&res, "multisector read with trail");
/* Then lead and trail. Use sector size as transfer unit to throw off
* simplistic lead/trail detection.
*/
fill_rand(buf2_ptr, buf2_size);
sum = get_sum(buf2_ptr + sector_size, buf2_size - sector_size);
simple_xfer(driver_minor, add64u(base_pos, min_read), buf2_ptr,
sector_size, FALSE, sector_size, &res);
test_sum(buf2_ptr, sector_size, get_sum(buf_ptr + min_read,
sector_size), TRUE, &res);
test_sum(buf2_ptr + sector_size, buf2_size - sector_size, sum, TRUE,
&res);
got_result(&res, "multisector read with lead and trail");
/* Clean up. */
free_contig(buf2_ptr, buf2_size);
free_contig(buf_ptr, buf_size);
}
static void unaligned_pos2(void)
{
/* Test sector-unaligned positions and total sizes for requests, second
* part. This one tests the use of multiple I/O vector elements, and
* tries to push the limits of the driver by completely filling an I/O
* vector and going up to the maximum request size.
*/
u8_t *buf_ptr, *buf2_ptr;
size_t buf_size, buf2_size, max_block;
u32_t sum = 0L, sum2 = 0L, rsum[NR_IOREQS];
u64_t base_pos;
iovec_t iov[NR_IOREQS];
result_t res;
int i;
test_group("sector-unaligned positions, part two",
min_read != sector_size);
/* We can only do this test if the driver allows small read requests.
*/
if (min_read == sector_size)
return;
buf_size = buf2_size = max_size + sector_size;
base_pos = cvu64(sector_size * 3);
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if ((buf2_ptr = alloc_contig(buf2_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
/* First establish a baseline. We need two requests for this, as the
* total area intentionally exceeds the max request size.
*/
if (may_write) {
sum = fill_rand(buf_ptr, max_size);
simple_xfer(driver_minor, base_pos, buf_ptr, max_size, TRUE,
max_size, &res);
got_result(&res, "large baseline write");
sum2 = fill_rand(buf_ptr + max_size, sector_size);
simple_xfer(driver_minor, add64u(base_pos, max_size),
buf_ptr + max_size, sector_size, TRUE, sector_size,
&res);
got_result(&res, "small baseline write");
}
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, max_size, FALSE, max_size,
&res);
if (may_write)
test_sum(buf_ptr, max_size, sum, TRUE, &res);
got_result(&res, "large baseline read");
simple_xfer(driver_minor, add64u(base_pos, max_size), buf_ptr +
max_size, sector_size, FALSE, sector_size, &res);
if (may_write)
test_sum(buf_ptr + max_size, sector_size, sum2, TRUE, &res);
got_result(&res, "small baseline read");
/* First construct a full vector with minimal sizes. The resulting area
* may well fall within a single sector, if min_read is small enough.
*/
fill_rand(buf2_ptr, buf2_size);
for (i = 0; i < NR_IOREQS; i++) {
iov[i].iov_addr = (vir_bytes) buf2_ptr + i * sector_size;
iov[i].iov_size = min_read;
rsum[i] = get_sum(buf2_ptr + i * sector_size + min_read,
sector_size - min_read);
}
vir_xfer(driver_minor, add64u(base_pos, min_read), iov, NR_IOREQS,
FALSE, min_read * NR_IOREQS, &res);
for (i = 0; i < NR_IOREQS; i++) {
test_sum(buf2_ptr + i * sector_size + min_read,
sector_size - min_read, rsum[i], TRUE, &res);
memmove(buf2_ptr + i * min_read, buf2_ptr + i * sector_size,
min_read);
}
test_sum(buf2_ptr, min_read * NR_IOREQS, get_sum(buf_ptr + min_read,
min_read * NR_IOREQS), TRUE, &res);
got_result(&res, "small fully unaligned filled vector");
/* Sneak in a maximum sized request with a single I/O vector element,
* unaligned. If the driver splits up such large requests into smaller
* chunks, this tests whether it does so correctly in the presence of
* leads and trails.
*/
fill_rand(buf2_ptr, buf2_size);
simple_xfer(driver_minor, add64u(base_pos, min_read), buf2_ptr,
max_size, FALSE, max_size, &res);
test_sum(buf2_ptr, max_size, get_sum(buf_ptr + min_read, max_size),
TRUE, &res);
got_result(&res, "large fully unaligned single element");
/* Then try with a vector where each element is as large as possible.
* We don't have room to do bounds integrity checking here (we could
* make room, but this may be a lot of memory already).
*/
/* Compute the largest sector multiple which, when multiplied by
* NR_IOREQS, is no more than the maximum transfer size.
*/
max_block = max_size / NR_IOREQS;
max_block -= max_block % sector_size;
fill_rand(buf2_ptr, buf2_size);
for (i = 0; i < NR_IOREQS; i++) {
iov[i].iov_addr = (vir_bytes) buf2_ptr + i * max_block;
iov[i].iov_size = max_block;
}
vir_xfer(driver_minor, add64u(base_pos, min_read), iov, NR_IOREQS,
FALSE, max_block * NR_IOREQS, &res);
test_sum(buf2_ptr, max_block * NR_IOREQS, get_sum(buf_ptr + min_read,
max_block * NR_IOREQS), TRUE, &res);
got_result(&res, "large fully unaligned filled vector");
/* Clean up. */
free_contig(buf2_ptr, buf2_size);
free_contig(buf_ptr, buf_size);
}
static void sweep_area(u64_t base_pos)
{
/* Go over an eight-sector area from left (low address) to right (high
* address), reading and optionally writing in three-sector chunks, and
* advancing one sector at a time.
*/
u8_t *buf_ptr;
size_t buf_size;
u32_t sum = 0L, ssum[8];
result_t res;
int i, j;
buf_size = sector_size * 8;
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
/* First (write to, if allowed, and) read from the entire area in one
* go, so that we know the (initial) contents of the area.
*/
if (may_write) {
sum = fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, TRUE,
buf_size, &res);
got_result(&res, "write to full area");
}
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, FALSE, buf_size,
&res);
if (may_write)
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
for (i = 0; i < 8; i++)
ssum[i] = get_sum(buf_ptr + sector_size * i, sector_size);
got_result(&res, "read from full area");
/* For each of the six three-sector subareas, first read from the
* subarea, check its checksum, and then (if allowed) write new content
* to it.
*/
for (i = 0; i < 6; i++) {
fill_rand(buf_ptr, sector_size * 3);
simple_xfer(driver_minor, add64u(base_pos, sector_size * i),
buf_ptr, sector_size * 3, FALSE, sector_size * 3,
&res);
for (j = 0; j < 3; j++)
test_sum(buf_ptr + sector_size * j, sector_size,
ssum[i + j], TRUE, &res);
got_result(&res, "read from subarea");
if (!may_write)
continue;
fill_rand(buf_ptr, sector_size * 3);
simple_xfer(driver_minor, add64u(base_pos, sector_size * i),
buf_ptr, sector_size * 3, TRUE, sector_size * 3, &res);
for (j = 0; j < 3; j++)
ssum[i + j] = get_sum(buf_ptr + sector_size * j,
sector_size);
got_result(&res, "write to subarea");
}
/* Finally, if writing was enabled, do one final readback. */
if (may_write) {
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, base_pos, buf_ptr, buf_size, FALSE,
buf_size, &res);
for (i = 0; i < 8; i++)
test_sum(buf_ptr + sector_size * i, sector_size,
ssum[i], TRUE, &res);
got_result(&res, "readback from full area");
}
/* Clean up. */
free_contig(buf_ptr, buf_size);
}
static void sweep_and_check(u64_t pos, int check_integ)
{
/* Perform an area sweep at the given position. If asked for, get an
* integrity checksum over the beginning of the disk (first writing
* known data into it if that is allowed) before doing the sweep, and
* test the integrity checksum against the disk contents afterwards.
*/
u8_t *buf_ptr;
size_t buf_size;
u32_t sum = 0L;
result_t res;
if (check_integ) {
buf_size = sector_size * 3;
if ((buf_ptr = alloc_contig(buf_size, 0, NULL)) == NULL)
panic("unable to allocate memory");
if (may_write) {
sum = fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, cvu64(0), buf_ptr, buf_size,
TRUE, buf_size, &res);
got_result(&res, "write integrity zone");
}
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, cvu64(0), buf_ptr, buf_size, FALSE,
buf_size, &res);
if (may_write)
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
else
sum = get_sum(buf_ptr, buf_size);
got_result(&res, "read integrity zone");
}
sweep_area(pos);
if (check_integ) {
fill_rand(buf_ptr, buf_size);
simple_xfer(driver_minor, cvu64(0), buf_ptr, buf_size, FALSE,
buf_size, &res);
test_sum(buf_ptr, buf_size, sum, TRUE, &res);
got_result(&res, "check integrity zone");
free_contig(buf_ptr, buf_size);
}
}
static void basic_sweep(void)
{
/* Perform a basic area sweep.
*/
test_group("basic area sweep", TRUE);
sweep_area(cvu64(sector_size));
}
static void high_disk_pos(void)
{
/* Test 64-bit absolute disk positions. This means that after adding
* partition base to the given position, the driver will be dealing
* with a position above 32 bit. We want to test the transition area
* only; if the entire partition base is above 32 bit, we have already
* effectively performed this test many times over. In other words, for
* this test, the partition must start below 4GB and end above 4GB,
* with at least four sectors on each side.
*/
u64_t base_pos;
base_pos = make64(sector_size * 4, 1L);
base_pos = sub64u(base_pos, rem64u(base_pos, sector_size));
/* The partition end must exceed 32 bits. */
if (cmp64(add64(part.base, part.size), base_pos) < 0) {
test_group("high disk positions", FALSE);
return;
}
base_pos = sub64u(base_pos, sector_size * 8);
/* The partition start must not. */
if (cmp64(base_pos, part.base) < 0) {
test_group("high disk positions", FALSE);
return;
}
test_group("high disk positions", TRUE);
base_pos = sub64(base_pos, part.base);
sweep_and_check(base_pos, !cmp64u(part.base, 0));
}
static void high_part_pos(void)
{
/* Test 64-bit partition-relative disk positions. In other words, use
* within the current partition a position that exceeds a 32-bit value.
* This requires the partition to be more than 4GB in size; we need an
* additional 4 sectors, to be exact.
*/
u64_t base_pos;
/* If the partition starts at the beginning of the disk, this test is
* no different from the high disk position test.
*/
if (cmp64u(part.base, 0) == 0) {
/* don't complain: the test is simply superfluous now */
return;
}
base_pos = make64(sector_size * 4, 1L);
base_pos = sub64u(base_pos, rem64u(base_pos, sector_size));
if (cmp64(part.size, base_pos) < 0) {
test_group("high partition positions", FALSE);
return;
}
test_group("high partition positions", TRUE);
base_pos = sub64u(base_pos, sector_size * 8);
sweep_and_check(base_pos, TRUE);
}
static void high_lba_pos1(void)
{
/* Test 48-bit LBA positions, as opposed to *24-bit*. Drivers that only
* support 48-bit LBA ATA transfers, will treat the lower and upper 24
* bits differently. This is again relative to the disk start, not the
* partition start. For 512-byte sectors, the lowest position exceeding
* 24 bit is at 8GB. As usual, we need four sectors more, and fewer, on
* the other side. The partition that we're operating on, must cover
* this area.
*/
u64_t base_pos;
base_pos = mul64u(1L << 24, sector_size);
/* The partition end must exceed the 24-bit sector point. */
if (cmp64(add64(part.base, part.size), base_pos) < 0) {
test_group("high LBA positions, part one", FALSE);
return;
}
base_pos = sub64u(base_pos, sector_size * 8);
/* The partition start must not. */
if (cmp64(base_pos, part.base) < 0) {
test_group("high LBA positions, part one", FALSE);
return;
}
test_group("high LBA positions, part one", TRUE);
base_pos = sub64(base_pos, part.base);
sweep_and_check(base_pos, !cmp64u(part.base, 0));
}
static void high_lba_pos2(void)
{
/* Test 48-bit LBA positions, as opposed to *28-bit*. That means sector
* numbers in excess of 28-bit values; the old ATA upper limit. The
* same considerations as above apply, except that we now need a 128+GB
* partition.
*/
u64_t base_pos;
base_pos = mul64u(1L << 28, sector_size);
/* The partition end must exceed the 28-bit sector point. */
if (cmp64(add64(part.base, part.size), base_pos) < 0) {
test_group("high LBA positions, part two", FALSE);
return;
}
base_pos = sub64u(base_pos, sector_size * 8);
/* The partition start must not. */
if (cmp64(base_pos, part.base) < 0) {
test_group("high LBA positions, part two", FALSE);
return;
}
test_group("high LBA positions, part two", TRUE);
base_pos = sub64(base_pos, part.base);
sweep_and_check(base_pos, !cmp64u(part.base, 0));
}
static void high_pos(void)
{
/* Check whether the driver deals well with 64-bit positions and
* 48-bit LBA addresses. We test three cases: disk byte position beyond
* what fits in 32 bit, in-partition byte position beyond what fits in
* 32 bit, and disk sector position beyond what fits in 24 bit. With
* the partition we've been given, we may not be able to test all of
* them (or any, for that matter).
*/
/* In certain rare cases, we might be able to perform integrity
* checking on the area that would be affected if a 32-bit/24-bit
* counter were to wrap. More specifically: we can do that if we can
* access the start of the disk. This is why we should be given the
* entire disk as test area if at all possible.
*/
basic_sweep();
high_disk_pos();
high_part_pos();
high_lba_pos1();
high_lba_pos2();
}
static void open_primary(void)
{
/* Open the primary device. This call has its own test group.
*/
test_group("device open", TRUE);
open_device(driver_minor);
}
static void close_primary(void)
{
/* Close the primary device. This call has its own test group.
*/
test_group("device close", TRUE);
close_device(driver_minor);
assert(nr_opened == 0);
}
static void do_tests(void)
{
/* Perform all the tests.
*/
open_primary();
misc_ioctl();
bad_read1();
bad_read2();
/* It is assumed that the driver implementation uses shared
* code paths for read and write for the basic checks, so we do
* not repeat those for writes.
*/
bad_write();
vector_and_large();
part_limits();
unaligned_size();
unaligned_pos1();
unaligned_pos2();
high_pos();
close_primary();
}
static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
{
/* Initialize.
*/
int r;
clock_t now;
if (env_argc > 1)
optset_parse(optset_table, env_argv[1]);
if (driver_label[0] == '\0')
panic("no driver label given");
if (ds_retrieve_label_endpt(driver_label, &driver_endpt))
panic("unable to resolve driver label");
if (driver_minor > 255)
panic("invalid or no driver minor given");
if ((r = getuptime(&now)) != OK)
panic("unable to get uptime: %d", r);
srand48(now);
return OK;
}
static void sef_local_startup(void)
{
/* Initialize the SEF framework.
*/
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_startup();
}
int main(int argc, char **argv)
{
/* Driver task.
*/
env_setargs(argc, argv);
sef_local_startup();
printf("BLOCKTEST: driver label '%s' (endpt %d), minor %d\n",
driver_label, driver_endpt, driver_minor);
do_tests();
printf("BLOCKTEST: summary: %d out of %d tests failed "
"across %d group%s; %d driver deaths\n",
failed_tests, total_tests, failed_groups,
failed_groups == 1 ? "" : "s", driver_deaths);
return 0;
}
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