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SBC: Add support for WRITESAME10 and a simple test for using writesame10 to unmap blocks from thin provisioned luns

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This commit is contained in:
Ronnie Sahlberg
2012-04-28 13:55:37 +10:00
parent dc01df1e00
commit cc0fa15e14
9 changed files with 278 additions and 1 deletions
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3
Makefile.am
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@@ -64,7 +64,8 @@ bin_iscsi_test_SOURCES = test-tool/iscsi-test.c \
test-tool/0143_read12_rdprotect.c \
test-tool/0153_read16_rdprotect.c \
test-tool/0160_readcapacity16_simple.c \
test-tool/0170_unmap_simple.c test-tool/0171_unmap_zero.c
test-tool/0170_unmap_simple.c test-tool/0171_unmap_zero.c \
test-tool/0180_writesame10_unmap.c
endif
# LD_PRELOAD library.

14
include/iscsi.h
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@@ -608,6 +608,13 @@ iscsi_verify10_task(struct iscsi_context *iscsi, int lun,
int blocksize, iscsi_command_cb cb,
void *private_data);
EXTERN struct scsi_task *
iscsi_writesame10_task(struct iscsi_context *iscsi, int lun,
unsigned char *data, uint32_t datalen,
uint32_t lba, uint16_t num_blocks,
int anchor, int unmap, int pbdata, int lbdata,
int wrprotect, int group,
iscsi_command_cb cb, void *private_data);
EXTERN struct scsi_task *
iscsi_modesense6_task(struct iscsi_context *iscsi, int lun, int dbd,
int pc, int page_code, int sub_page_code,
unsigned char alloc_len, iscsi_command_cb cb,
@@ -672,6 +679,13 @@ iscsi_verify10_sync(struct iscsi_context *iscsi, int lun,
int vprotect, int dpo, int bytchk,
int blocksize);
EXTERN struct scsi_task *
iscsi_writesame10_sync(struct iscsi_context *iscsi, int lun,
unsigned char *data, uint32_t datalen,
uint32_t lba, uint16_t num_blocks,
int anchor, int unmap, int pbdata, int lbdata,
int wrprotect, int group);
EXTERN struct scsi_task *
iscsi_unmap_sync(struct iscsi_context *iscsi, int lun, int anchor, int group,
struct unmap_list *list, int list_len);

2
include/scsi-lowlevel.h
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@@ -29,6 +29,7 @@ enum scsi_opcode {
SCSI_OPCODE_WRITE10 = 0x2A,
SCSI_OPCODE_VERIFY10 = 0x2F,
SCSI_OPCODE_SYNCHRONIZECACHE10 = 0x35,
SCSI_OPCODE_WRITE_SAME10 = 0x41,
SCSI_OPCODE_UNMAP = 0x42,
SCSI_OPCODE_READ16 = 0x88,
SCSI_OPCODE_SERVICE_ACTION_IN = 0x9E,
@@ -563,6 +564,7 @@ EXTERN struct scsi_task *scsi_cdb_synchronizecache10(int lba, int num_blocks,
EXTERN struct scsi_task *scsi_cdb_serviceactionin16(enum scsi_service_action_in sa, uint32_t xferlen);
EXTERN struct scsi_task *scsi_cdb_readcapacity16(void);
EXTERN struct scsi_task *scsi_cdb_unmap(int anchor, int group, uint16_t xferlen);
EXTERN struct scsi_task *scsi_cdb_writesame10(int wrprotect, int anchor, int unmap, int pbdata, int lbdata, uint32_t lba, int group, uint16_t num_blocks);
void *scsi_malloc(struct scsi_task *task, size_t size);

44
lib/scsi-command.c
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@@ -794,6 +794,50 @@ iscsi_synchronizecache10_task(struct iscsi_context *iscsi, int lun, int lba,
return task;
}
struct scsi_task *
iscsi_writesame10_task(struct iscsi_context *iscsi, int lun,
unsigned char *data, uint32_t datalen,
uint32_t lba, uint16_t num_blocks,
int anchor, int unmap, int pbdata, int lbdata,
int wrprotect, int group,
iscsi_command_cb cb, void *private_data)
{
struct scsi_task *task;
struct iscsi_data outdata;
task = scsi_cdb_writesame10(wrprotect, anchor, unmap, pbdata, lbdata, lba, group, num_blocks);
if (task == NULL) {
iscsi_set_error(iscsi, "Out-of-memory: Failed to create "
"writesame10 cdb.");
return NULL;
}
if (datalen) {
outdata.data = data;
outdata.size = datalen;
task->expxferlen = datalen;
if (iscsi_scsi_command_async(iscsi, lun, task, cb, &outdata,
private_data) != 0) {
scsi_free_scsi_task(task);
return NULL;
}
} else {
task->expxferlen = 0;
task->xfer_dir = SCSI_XFER_NONE;
if (iscsi_scsi_command_async(iscsi, lun, task, cb, NULL,
private_data) != 0) {
scsi_free_scsi_task(task);
return NULL;
}
}
return task;
}
struct scsi_task *
iscsi_unmap_task(struct iscsi_context *iscsi, int lun, int anchor, int group,
struct unmap_list *list, int list_len,

44
lib/scsi-lowlevel.c
View File

@@ -789,6 +789,50 @@ scsi_cdb_unmap(int anchor, int group, uint16_t xferlen)
return task;
}
/*
* WRITE_SAME10
*/
struct scsi_task *
scsi_cdb_writesame10(int wrprotect, int anchor, int unmap, int pbdata, int lbdata, uint32_t lba, int group, uint16_t num_blocks)
{
struct scsi_task *task;
task = malloc(sizeof(struct scsi_task));
if (task == NULL) {
return NULL;
}
memset(task, 0, sizeof(struct scsi_task));
task->cdb[0] = SCSI_OPCODE_WRITE_SAME10;
if (wrprotect) {
task->cdb[1] |= ((wrprotect & 0x7) << 5);
}
if (anchor) {
task->cdb[1] |= 0x10;
}
if (unmap) {
task->cdb[1] |= 0x08;
}
if (pbdata) {
task->cdb[1] |= 0x04;
}
if (lbdata) {
task->cdb[1] |= 0x02;
}
*(uint32_t *)&task->cdb[2] = htonl(lba);
if (group) {
task->cdb[6] |= (group & 0x1f);
}
*(uint16_t *)&task->cdb[7] = htons(num_blocks);
task->cdb_size = 10;
task->xfer_dir = SCSI_XFER_WRITE;
task->expxferlen = 512;
return task;
}
/*
* MODESENSE6
*/

26
lib/sync.c
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@@ -361,6 +361,32 @@ iscsi_verify10_sync(struct iscsi_context *iscsi, int lun, unsigned char *data, u
return state.task;
}
struct scsi_task *
iscsi_writesame10_sync(struct iscsi_context *iscsi, int lun,
unsigned char *data, uint32_t datalen,
uint32_t lba, uint16_t num_blocks,
int anchor, int unmap, int pbdata, int lbdata,
int wrprotect, int group)
{
struct iscsi_sync_state state;
memset(&state, 0, sizeof(state));
if (iscsi_writesame10_task(iscsi, lun, data, datalen,
lba, num_blocks,
anchor, unmap, pbdata, lbdata,
wrprotect, group,
scsi_sync_cb, &state) == NULL) {
iscsi_set_error(iscsi,
"Failed to send WRITESAME10 command");
return NULL;
}
event_loop(iscsi, &state);
return state.task;
}
struct scsi_task *
iscsi_unmap_sync(struct iscsi_context *iscsi, int lun, int anchor, int group,
struct unmap_list *list, int list_len)

141
test-tool/0180_writesame10_unmap.c Normal file
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@@ -0,0 +1,141 @@
/*
Copyright (C) 2012 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include "iscsi.h"
#include "scsi-lowlevel.h"
#include "iscsi-test.h"
int T0180_writesame10_unmap(const char *initiator, const char *url)
{
struct iscsi_context *iscsi;
struct scsi_task *task;
struct scsi_readcapacity16 *rc16;
int ret, i, lun;
uint32_t block_size, num_blocks;
int lbppb;
iscsi = iscsi_context_login(initiator, url, &lun);
if (iscsi == NULL) {
printf("Failed to login to target\n");
return -1;
}
/* find the size of the LUN */
task = iscsi_readcapacity16_sync(iscsi, lun);
if (task == NULL) {
printf("Failed to send readcapacity16 command: %s\n", iscsi_get_error(iscsi));
ret = -1;
goto finished;
}
if (task->status != SCSI_STATUS_GOOD) {
printf("Readcapacity command: failed with sense. %s\n", iscsi_get_error(iscsi));
ret = -1;
scsi_free_scsi_task(task);
goto finished;
}
rc16 = scsi_datain_unmarshall(task);
if (rc16 == NULL) {
printf("failed to unmarshall readcapacity16 data. %s\n", iscsi_get_error(iscsi));
ret = -1;
scsi_free_scsi_task(task);
goto finished;
}
if (rc16->lbpme == 0){
printf("Logical unit is fully provisioned. Skipping test\n");
ret = -1;
scsi_free_scsi_task(task);
goto finished;
}
block_size = rc16->block_length;
num_blocks = rc16->returned_lba;
lbppb = 1 << rc16->lbppbe;
scsi_free_scsi_task(task);
if (!data_loss) {
printf("--dataloss flag is not set. Skipping test\n");
ret = -1;
goto finished;
}
ret = 0;
/* unmap the first 1 - 256 blocks at the start of the LUN */
printf("Unmapping first 1-256 blocks ... ");
for (i=1; i<=256; i++) {
/* only try unmapping whole physical blocks */
if (i % lbppb) {
continue;
}
task = iscsi_writesame10_sync(iscsi, lun, NULL, 0,
0, i,
0, 1, 0, 0, 0, 0);
if (task == NULL) {
printf("[FAILED]\n");
printf("Failed to send WRITESAME10 command: %s\n", iscsi_get_error(iscsi));
ret = -1;
goto finished;
}
if (task->status != SCSI_STATUS_GOOD) {
printf("[FAILED]\n");
printf("WRITESAME10 command: failed with sense. %s\n", iscsi_get_error(iscsi));
ret = -1;
scsi_free_scsi_task(task);
goto finished;
}
scsi_free_scsi_task(task);
}
printf("[OK]\n");
/* unmap the last 1 - 256 blocks at the end of the LUN */
printf("Unmapping last 1-256 blocks ... ");
for (i=1; i<=256; i++) {
/* only try unmapping whole physical blocks */
if (i % lbppb) {
continue;
}
task = iscsi_writesame10_sync(iscsi, lun, NULL, 0,
num_blocks + 1 - i, i,
0, 1, 0, 0, 0, 0);
if (task == NULL) {
printf("[FAILED]\n");
printf("Failed to send WRITESAME10 command: %s\n", iscsi_get_error(iscsi));
ret = -1;
goto finished;
}
if (task->status != SCSI_STATUS_GOOD) {
printf("[FAILED]\n");
printf("WRITESAME10 command: failed with sense. %s\n", iscsi_get_error(iscsi));
ret = -1;
scsi_free_scsi_task(task);
goto finished;
}
scsi_free_scsi_task(task);
}
printf("[OK]\n");
finished:
iscsi_logout_sync(iscsi);
iscsi_destroy_context(iscsi);
return ret;
}

3
test-tool/iscsi-test.c
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@@ -72,6 +72,9 @@ struct scsi_test tests[] = {
{ "T0170_unmap_simple", T0170_unmap_simple },
{ "T0171_unmap_zero", T0171_unmap_zero },
/* writesame10*/
{ "T0180_writesame10_unmap", T0180_writesame10_unmap },
{ NULL, NULL }
};

2
test-tool/iscsi-test.h
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@@ -47,3 +47,5 @@ int T0160_readcapacity16_simple(const char *initiator, const char *url);
int T0170_unmap_simple(const char *initiator, const char *url);
int T0171_unmap_zero(const char *initiator, const char *url);
int T0180_writesame10_unmap(const char *initiator, const char *url);