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ahci-test: test atapi read_cd with bcl, nb_sectors = 0 

Commit 9ef2e93f introduced the concept of tagging ATAPI commands as
NONDATA, but this introduced a regression for certain commands better
described as CONDDATA. read_cd is such a command that both requires
a non-zero BCL if a transfer size is set, but is perfectly content to
accept a zero BCL if the transfer size is 0.

This test adds a regression test for the case where BCL and nb_sectors
are both 0.

Flesh out the CDROM tests by:

(1) Allowing the test to specify a BCL
(2) Allowing the buffer comparison test to compare a 0-size buffer
(3) Fix the BCL specification in libqos (It is LE, not BE)
(4) Add a nice human-readable message for future SCSI command additions

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1477970211-25754-4-git-send-email-jsnow@redhat.com
[Line length edit --js]
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2016-11-14 11:15:54 -05:00
parent 53c05e6c20
commit ebde93bf9a
3 changed files with 60 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
tests/ahci-test.c
View File

@ -1473,8 +1473,13 @@ static int ahci_cb_cmp_buff(AHCIQState *ahci, AHCICommand *cmd,
const AHCIOpts *opts)
{
unsigned char *tx = opts->opaque;
unsigned char *rx = g_malloc0(opts->size);
unsigned char *rx;
if (!opts->size) {
return 0;
}
rx = g_malloc0(opts->size);
bufread(opts->buffer, rx, opts->size);
g_assert_cmphex(memcmp(tx, rx, opts->size), ==, 0);
g_free(rx);
@ -1482,7 +1487,8 @@ static int ahci_cb_cmp_buff(AHCIQState *ahci, AHCICommand *cmd,
return 0;
}
static void ahci_test_cdrom(int nsectors, bool dma)
static void ahci_test_cdrom(int nsectors, bool dma, uint8_t cmd,
bool override_bcl, uint16_t bcl)
{
AHCIQState *ahci;
unsigned char *tx;
@ -1493,6 +1499,8 @@ static void ahci_test_cdrom(int nsectors, bool dma)
.atapi = true,
.atapi_dma = dma,
.post_cb = ahci_cb_cmp_buff,
.set_bcl = override_bcl,
.bcl = bcl,
};
uint64_t iso_size = ATAPI_SECTOR_SIZE * (nsectors + 1);
@ -1506,7 +1514,7 @@ static void ahci_test_cdrom(int nsectors, bool dma)
"-device ide-cd,drive=drive0 ", iso);
/* Build & Send AHCI command */
ahci_exec(ahci, ahci_port_select(ahci), CMD_ATAPI_READ_10, &opts);
ahci_exec(ahci, ahci_port_select(ahci), cmd, &opts);
/* Cleanup */
g_free(tx);
@ -1514,24 +1522,36 @@ static void ahci_test_cdrom(int nsectors, bool dma)
remove_iso(fd, iso);
}
static void ahci_test_cdrom_read10(int nsectors, bool dma)
{
ahci_test_cdrom(nsectors, dma, CMD_ATAPI_READ_10, false, 0);
}
static void test_cdrom_dma(void)
{
ahci_test_cdrom(1, true);
ahci_test_cdrom_read10(1, true);
}
static void test_cdrom_dma_multi(void)
{
ahci_test_cdrom(3, true);
ahci_test_cdrom_read10(3, true);
}
static void test_cdrom_pio(void)
{
ahci_test_cdrom(1, false);
ahci_test_cdrom_read10(1, false);
}
static void test_cdrom_pio_multi(void)
{
ahci_test_cdrom(3, false);
ahci_test_cdrom_read10(3, false);
}
/* Regression test: Test that a READ_CD command with a BCL of 0 but a size of 0
* completes as a NOP instead of erroring out. */
static void test_atapi_bcl(void)
{
ahci_test_cdrom(0, false, CMD_ATAPI_READ_CD, true, 0);
}
/******************************************************************************/
@ -1823,6 +1843,8 @@ int main(int argc, char **argv)
qtest_add_func("/ahci/cdrom/pio/single", test_cdrom_pio);
qtest_add_func("/ahci/cdrom/pio/multi", test_cdrom_pio_multi);
qtest_add_func("/ahci/cdrom/pio/bcl", test_atapi_bcl);
ret = g_test_run();
/* Cleanup */

28
tests/libqos/ahci.c
View File

@ -633,7 +633,8 @@ void ahci_exec(AHCIQState *ahci, uint8_t port,
/* Command creation */
if (opts->atapi) {
cmd = ahci_atapi_command_create(op);
uint16_t bcl = opts->set_bcl ? opts->bcl : ATAPI_SECTOR_SIZE;
cmd = ahci_atapi_command_create(op, bcl);
if (opts->atapi_dma) {
ahci_command_enable_atapi_dma(cmd);
}
@ -864,16 +865,12 @@ AHCICommand *ahci_command_create(uint8_t command_name)
return cmd;
}
AHCICommand *ahci_atapi_command_create(uint8_t scsi_cmd)
AHCICommand *ahci_atapi_command_create(uint8_t scsi_cmd, uint16_t bcl)
{
AHCICommand *cmd = ahci_command_create(CMD_PACKET);
cmd->atapi_cmd = g_malloc0(16);
cmd->atapi_cmd[0] = scsi_cmd;
/* ATAPI needs a PIO transfer chunk size set inside of the LBA registers.
* The block/sector size is a natural default. */
cmd->fis.lba_lo[1] = ATAPI_SECTOR_SIZE >> 8 & 0xFF;
cmd->fis.lba_lo[2] = ATAPI_SECTOR_SIZE & 0xFF;
stw_le_p(&cmd->fis.lba_lo[1], bcl);
return cmd;
}
@ -901,12 +898,17 @@ static void ahci_atapi_command_set_offset(AHCICommand *cmd, uint64_t lba)
switch (cbd[0]) {
case CMD_ATAPI_READ_10:
case CMD_ATAPI_READ_CD:
g_assert_cmpuint(lba, <=, UINT32_MAX);
stl_be_p(&cbd[2], lba);
break;
default:
/* SCSI doesn't have uniform packet formats,
* so you have to add support for it manually. Sorry! */
fprintf(stderr, "The Libqos AHCI driver does not support the "
"set_offset operation for ATAPI command 0x%02x, "
"please add support.\n",
cbd[0]);
g_assert_not_reached();
}
}
@ -951,6 +953,7 @@ static void ahci_atapi_set_size(AHCICommand *cmd, uint64_t xbytes)
{
unsigned char *cbd = cmd->atapi_cmd;
uint64_t nsectors = xbytes / 2048;
uint32_t tmp;
g_assert(cbd);
switch (cbd[0]) {
@ -958,9 +961,20 @@ static void ahci_atapi_set_size(AHCICommand *cmd, uint64_t xbytes)
g_assert_cmpuint(nsectors, <=, UINT16_MAX);
stw_be_p(&cbd[7], nsectors);
break;
case CMD_ATAPI_READ_CD:
/* 24bit BE store */
g_assert_cmpuint(nsectors, <, 1ULL << 24);
tmp = nsectors;
cbd[6] = (tmp & 0xFF0000) >> 16;
cbd[7] = (tmp & 0xFF00) >> 8;
cbd[8] = (tmp & 0xFF);
break;
default:
/* SCSI doesn't have uniform packet formats,
* so you have to add support for it manually. Sorry! */
fprintf(stderr, "The Libqos AHCI driver does not support the set_size "
"operation for ATAPI command 0x%02x, please add support.\n",
cbd[0]);
g_assert_not_reached();
}
}

17
tests/libqos/ahci.h
View File

@ -288,6 +288,7 @@ enum {
/* ATAPI Commands */
enum {
CMD_ATAPI_READ_10 = 0x28,
CMD_ATAPI_READ_CD = 0xbe,
};
/* AHCI Command Header Flags & Masks*/
@ -462,12 +463,14 @@ typedef struct AHCICommand AHCICommand;
/* Options to ahci_exec */
typedef struct AHCIOpts {
size_t size;
unsigned prd_size;
uint64_t lba;
uint64_t buffer;
bool atapi;
bool atapi_dma;
size_t size; /* Size of transfer */
unsigned prd_size; /* Size per-each PRD */
bool set_bcl; /* Override the default BCL of ATAPI_SECTOR_SIZE */
unsigned bcl; /* Byte Count Limit, for ATAPI PIO */
uint64_t lba; /* Starting LBA offset */
uint64_t buffer; /* Pointer to source or destination guest buffer */
bool atapi; /* ATAPI command? */
bool atapi_dma; /* Use DMA for ATAPI? */
bool error;
int (*pre_cb)(AHCIQState*, AHCICommand*, const struct AHCIOpts *);
int (*mid_cb)(AHCIQState*, AHCICommand*, const struct AHCIOpts *);
@ -599,7 +602,7 @@ void ahci_exec(AHCIQState *ahci, uint8_t port,
/* Command: Fine-grained lifecycle */
AHCICommand *ahci_command_create(uint8_t command_name);
AHCICommand *ahci_atapi_command_create(uint8_t scsi_cmd);
AHCICommand *ahci_atapi_command_create(uint8_t scsi_cmd, uint16_t bcl);
void ahci_command_commit(AHCIQState *ahci, AHCICommand *cmd, uint8_t port);
void ahci_command_issue(AHCIQState *ahci, AHCICommand *cmd);
void ahci_command_issue_async(AHCIQState *ahci, AHCICommand *cmd);