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/*
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* QEMU Block driver for iSCSI images
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*
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* Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
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* Copyright (c) 2012-2013 Peter Lieven <pl@kamp.de>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config-host.h" |
| 27 |
|
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#include <poll.h> |
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#include <arpa/inet.h> |
| 30 |
#include "qemu-common.h" |
| 31 |
#include "qemu/config-file.h" |
| 32 |
#include "qemu/error-report.h" |
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#include "block/block_int.h" |
| 34 |
#include "trace.h" |
| 35 |
#include "block/scsi.h" |
| 36 |
#include "qemu/iov.h" |
| 37 |
#include "sysemu/sysemu.h" |
| 38 |
#include "qmp-commands.h" |
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|
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#include <iscsi/iscsi.h> |
| 41 |
#include <iscsi/scsi-lowlevel.h> |
| 42 |
|
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#ifdef __linux__
|
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#include <scsi/sg.h> |
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#include <block/scsi.h> |
| 46 |
#endif
|
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|
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typedef struct IscsiLun { |
| 49 |
struct iscsi_context *iscsi;
|
| 50 |
int lun;
|
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enum scsi_inquiry_peripheral_device_type type;
|
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int block_size;
|
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uint64_t num_blocks; |
| 54 |
int events;
|
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QEMUTimer *nop_timer; |
| 56 |
uint8_t lbpme; |
| 57 |
uint8_t lbprz; |
| 58 |
uint8_t has_write_same; |
| 59 |
struct scsi_inquiry_logical_block_provisioning lbp;
|
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struct scsi_inquiry_block_limits bl;
|
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unsigned char *zeroblock; |
| 62 |
} IscsiLun; |
| 63 |
|
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typedef struct IscsiTask { |
| 65 |
int status;
|
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int complete;
|
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int retries;
|
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int do_retry;
|
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struct scsi_task *task;
|
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Coroutine *co; |
| 71 |
QEMUBH *bh; |
| 72 |
} IscsiTask; |
| 73 |
|
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typedef struct IscsiAIOCB { |
| 75 |
BlockDriverAIOCB common; |
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QEMUIOVector *qiov; |
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QEMUBH *bh; |
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IscsiLun *iscsilun; |
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struct scsi_task *task;
|
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uint8_t *buf; |
| 81 |
int status;
|
| 82 |
int canceled;
|
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int retries;
|
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int64_t sector_num; |
| 85 |
int nb_sectors;
|
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#ifdef __linux__
|
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sg_io_hdr_t *ioh; |
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#endif
|
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} IscsiAIOCB; |
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|
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#define NOP_INTERVAL 5000 |
| 92 |
#define MAX_NOP_FAILURES 3 |
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#define ISCSI_CMD_RETRIES 5 |
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|
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static void |
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iscsi_bh_cb(void *p)
|
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{
|
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IscsiAIOCB *acb = p; |
| 99 |
|
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qemu_bh_delete(acb->bh); |
| 101 |
|
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g_free(acb->buf); |
| 103 |
acb->buf = NULL;
|
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|
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if (acb->canceled == 0) { |
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acb->common.cb(acb->common.opaque, acb->status); |
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} |
| 108 |
|
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if (acb->task != NULL) { |
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scsi_free_scsi_task(acb->task); |
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acb->task = NULL;
|
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} |
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|
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qemu_aio_release(acb); |
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} |
| 116 |
|
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static void |
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iscsi_schedule_bh(IscsiAIOCB *acb) |
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{
|
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if (acb->bh) {
|
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return;
|
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} |
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acb->bh = qemu_bh_new(iscsi_bh_cb, acb); |
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qemu_bh_schedule(acb->bh); |
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} |
| 126 |
|
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static void iscsi_co_generic_bh_cb(void *opaque) |
| 128 |
{
|
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struct IscsiTask *iTask = opaque;
|
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qemu_bh_delete(iTask->bh); |
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qemu_coroutine_enter(iTask->co, NULL);
|
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} |
| 133 |
|
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static void |
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iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, |
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void *command_data, void *opaque) |
| 137 |
{
|
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struct IscsiTask *iTask = opaque;
|
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struct scsi_task *task = command_data;
|
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|
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iTask->complete = 1;
|
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iTask->status = status; |
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iTask->do_retry = 0;
|
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iTask->task = task; |
| 145 |
|
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if (iTask->retries-- > 0 && status == SCSI_STATUS_CHECK_CONDITION |
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&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION) {
|
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error_report("iSCSI CheckCondition: %s", iscsi_get_error(iscsi));
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iTask->do_retry = 1;
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goto out;
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} |
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|
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if (status != SCSI_STATUS_GOOD) {
|
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error_report("iSCSI Failure: %s", iscsi_get_error(iscsi));
|
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} |
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|
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out:
|
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if (iTask->co) {
|
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iTask->bh = qemu_bh_new(iscsi_co_generic_bh_cb, iTask); |
| 160 |
qemu_bh_schedule(iTask->bh); |
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} |
| 162 |
} |
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|
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static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) |
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{
|
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*iTask = (struct IscsiTask) {
|
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.co = qemu_coroutine_self(), |
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.retries = ISCSI_CMD_RETRIES, |
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}; |
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} |
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|
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static void |
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iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, |
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void *private_data)
|
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{
|
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IscsiAIOCB *acb = private_data; |
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|
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acb->status = -ECANCELED; |
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iscsi_schedule_bh(acb); |
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} |
| 181 |
|
| 182 |
static void |
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iscsi_aio_cancel(BlockDriverAIOCB *blockacb) |
| 184 |
{
|
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IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; |
| 186 |
IscsiLun *iscsilun = acb->iscsilun; |
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|
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if (acb->status != -EINPROGRESS) {
|
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return;
|
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} |
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|
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acb->canceled = 1;
|
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|
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/* send a task mgmt call to the target to cancel the task on the target */
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iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
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iscsi_abort_task_cb, acb); |
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|
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while (acb->status == -EINPROGRESS) {
|
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qemu_aio_wait(); |
| 200 |
} |
| 201 |
} |
| 202 |
|
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static const AIOCBInfo iscsi_aiocb_info = { |
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.aiocb_size = sizeof(IscsiAIOCB),
|
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.cancel = iscsi_aio_cancel, |
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}; |
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|
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|
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static void iscsi_process_read(void *arg); |
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static void iscsi_process_write(void *arg); |
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|
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static void |
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iscsi_set_events(IscsiLun *iscsilun) |
| 214 |
{
|
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struct iscsi_context *iscsi = iscsilun->iscsi;
|
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int ev;
|
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|
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/* We always register a read handler. */
|
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ev = POLLIN; |
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ev |= iscsi_which_events(iscsi); |
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if (ev != iscsilun->events) {
|
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qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), |
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iscsi_process_read, |
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(ev & POLLOUT) ? iscsi_process_write : NULL,
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iscsilun); |
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|
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} |
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|
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iscsilun->events = ev; |
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} |
| 231 |
|
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static void |
| 233 |
iscsi_process_read(void *arg)
|
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{
|
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IscsiLun *iscsilun = arg; |
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struct iscsi_context *iscsi = iscsilun->iscsi;
|
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|
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iscsi_service(iscsi, POLLIN); |
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iscsi_set_events(iscsilun); |
| 240 |
} |
| 241 |
|
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static void |
| 243 |
iscsi_process_write(void *arg)
|
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{
|
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IscsiLun *iscsilun = arg; |
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struct iscsi_context *iscsi = iscsilun->iscsi;
|
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|
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iscsi_service(iscsi, POLLOUT); |
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iscsi_set_events(iscsilun); |
| 250 |
} |
| 251 |
|
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static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun)
|
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{
|
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return sector * iscsilun->block_size / BDRV_SECTOR_SIZE;
|
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} |
| 256 |
|
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static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
|
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{
|
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return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
|
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} |
| 261 |
|
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static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
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IscsiLun *iscsilun) |
| 264 |
{
|
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if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size ||
|
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(nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) {
|
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error_report("iSCSI misaligned request: "
|
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"iscsilun->block_size %u, sector_num %" PRIi64
|
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", nb_sectors %d",
|
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iscsilun->block_size, sector_num, nb_sectors); |
| 271 |
return 0; |
| 272 |
} |
| 273 |
return 1; |
| 274 |
} |
| 275 |
|
| 276 |
static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, |
| 277 |
int64_t sector_num, int nb_sectors,
|
| 278 |
QEMUIOVector *iov) |
| 279 |
{
|
| 280 |
IscsiLun *iscsilun = bs->opaque; |
| 281 |
struct IscsiTask iTask;
|
| 282 |
uint64_t lba; |
| 283 |
uint32_t num_sectors; |
| 284 |
uint8_t *data = NULL;
|
| 285 |
uint8_t *buf = NULL;
|
| 286 |
|
| 287 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
| 288 |
return -EINVAL;
|
| 289 |
} |
| 290 |
|
| 291 |
lba = sector_qemu2lun(sector_num, iscsilun); |
| 292 |
num_sectors = sector_qemu2lun(nb_sectors, iscsilun); |
| 293 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 294 |
/* if the iovec only contains one buffer we can pass it directly */
|
| 295 |
if (iov->niov == 1) { |
| 296 |
data = iov->iov[0].iov_base;
|
| 297 |
} else {
|
| 298 |
size_t size = MIN(nb_sectors * BDRV_SECTOR_SIZE, iov->size); |
| 299 |
buf = g_malloc(size); |
| 300 |
qemu_iovec_to_buf(iov, 0, buf, size);
|
| 301 |
data = buf; |
| 302 |
} |
| 303 |
#endif
|
| 304 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 305 |
retry:
|
| 306 |
iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, |
| 307 |
data, num_sectors * iscsilun->block_size, |
| 308 |
iscsilun->block_size, 0, 0, 0, 0, 0, |
| 309 |
iscsi_co_generic_cb, &iTask); |
| 310 |
if (iTask.task == NULL) { |
| 311 |
g_free(buf); |
| 312 |
return -ENOMEM;
|
| 313 |
} |
| 314 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 315 |
scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov,
|
| 316 |
iov->niov); |
| 317 |
#endif
|
| 318 |
while (!iTask.complete) {
|
| 319 |
iscsi_set_events(iscsilun); |
| 320 |
qemu_coroutine_yield(); |
| 321 |
} |
| 322 |
|
| 323 |
if (iTask.task != NULL) { |
| 324 |
scsi_free_scsi_task(iTask.task); |
| 325 |
iTask.task = NULL;
|
| 326 |
} |
| 327 |
|
| 328 |
if (iTask.do_retry) {
|
| 329 |
iTask.complete = 0;
|
| 330 |
goto retry;
|
| 331 |
} |
| 332 |
|
| 333 |
g_free(buf); |
| 334 |
|
| 335 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 336 |
return -EIO;
|
| 337 |
} |
| 338 |
|
| 339 |
return 0; |
| 340 |
} |
| 341 |
|
| 342 |
static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
| 343 |
int64_t sector_num, int nb_sectors,
|
| 344 |
QEMUIOVector *iov) |
| 345 |
{
|
| 346 |
IscsiLun *iscsilun = bs->opaque; |
| 347 |
struct IscsiTask iTask;
|
| 348 |
uint64_t lba; |
| 349 |
uint32_t num_sectors; |
| 350 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 351 |
int i;
|
| 352 |
#endif
|
| 353 |
|
| 354 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
| 355 |
return -EINVAL;
|
| 356 |
} |
| 357 |
|
| 358 |
lba = sector_qemu2lun(sector_num, iscsilun); |
| 359 |
num_sectors = sector_qemu2lun(nb_sectors, iscsilun); |
| 360 |
|
| 361 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 362 |
retry:
|
| 363 |
switch (iscsilun->type) {
|
| 364 |
case TYPE_DISK:
|
| 365 |
iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
| 366 |
num_sectors * iscsilun->block_size, |
| 367 |
iscsilun->block_size, 0, 0, 0, 0, 0, |
| 368 |
iscsi_co_generic_cb, &iTask); |
| 369 |
break;
|
| 370 |
default:
|
| 371 |
iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
| 372 |
num_sectors * iscsilun->block_size, |
| 373 |
iscsilun->block_size, |
| 374 |
#if !defined(CONFIG_LIBISCSI_1_4) /* API change from 1.4.0 to 1.5.0 */ |
| 375 |
0, 0, 0, 0, 0, |
| 376 |
#endif
|
| 377 |
iscsi_co_generic_cb, &iTask); |
| 378 |
break;
|
| 379 |
} |
| 380 |
if (iTask.task == NULL) { |
| 381 |
return -ENOMEM;
|
| 382 |
} |
| 383 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 384 |
scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov);
|
| 385 |
#else
|
| 386 |
for (i = 0; i < iov->niov; i++) { |
| 387 |
scsi_task_add_data_in_buffer(iTask.task, |
| 388 |
iov->iov[i].iov_len, |
| 389 |
iov->iov[i].iov_base); |
| 390 |
} |
| 391 |
#endif
|
| 392 |
|
| 393 |
while (!iTask.complete) {
|
| 394 |
iscsi_set_events(iscsilun); |
| 395 |
qemu_coroutine_yield(); |
| 396 |
} |
| 397 |
|
| 398 |
if (iTask.task != NULL) { |
| 399 |
scsi_free_scsi_task(iTask.task); |
| 400 |
iTask.task = NULL;
|
| 401 |
} |
| 402 |
|
| 403 |
if (iTask.do_retry) {
|
| 404 |
iTask.complete = 0;
|
| 405 |
goto retry;
|
| 406 |
} |
| 407 |
|
| 408 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 409 |
return -EIO;
|
| 410 |
} |
| 411 |
|
| 412 |
return 0; |
| 413 |
} |
| 414 |
|
| 415 |
static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
| 416 |
{
|
| 417 |
IscsiLun *iscsilun = bs->opaque; |
| 418 |
struct IscsiTask iTask;
|
| 419 |
|
| 420 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 421 |
|
| 422 |
retry:
|
| 423 |
if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, |
| 424 |
0, iscsi_co_generic_cb, &iTask) == NULL) { |
| 425 |
return -ENOMEM;
|
| 426 |
} |
| 427 |
|
| 428 |
while (!iTask.complete) {
|
| 429 |
iscsi_set_events(iscsilun); |
| 430 |
qemu_coroutine_yield(); |
| 431 |
} |
| 432 |
|
| 433 |
if (iTask.task != NULL) { |
| 434 |
scsi_free_scsi_task(iTask.task); |
| 435 |
iTask.task = NULL;
|
| 436 |
} |
| 437 |
|
| 438 |
if (iTask.do_retry) {
|
| 439 |
iTask.complete = 0;
|
| 440 |
goto retry;
|
| 441 |
} |
| 442 |
|
| 443 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 444 |
return -EIO;
|
| 445 |
} |
| 446 |
|
| 447 |
return 0; |
| 448 |
} |
| 449 |
|
| 450 |
#ifdef __linux__
|
| 451 |
static void |
| 452 |
iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, |
| 453 |
void *command_data, void *opaque) |
| 454 |
{
|
| 455 |
IscsiAIOCB *acb = opaque; |
| 456 |
|
| 457 |
g_free(acb->buf); |
| 458 |
acb->buf = NULL;
|
| 459 |
|
| 460 |
if (acb->canceled != 0) { |
| 461 |
return;
|
| 462 |
} |
| 463 |
|
| 464 |
acb->status = 0;
|
| 465 |
if (status < 0) { |
| 466 |
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
|
| 467 |
iscsi_get_error(iscsi)); |
| 468 |
acb->status = -EIO; |
| 469 |
} |
| 470 |
|
| 471 |
acb->ioh->driver_status = 0;
|
| 472 |
acb->ioh->host_status = 0;
|
| 473 |
acb->ioh->resid = 0;
|
| 474 |
|
| 475 |
#define SG_ERR_DRIVER_SENSE 0x08 |
| 476 |
|
| 477 |
if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { |
| 478 |
int ss;
|
| 479 |
|
| 480 |
acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; |
| 481 |
|
| 482 |
acb->ioh->sb_len_wr = acb->task->datain.size - 2;
|
| 483 |
ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? |
| 484 |
acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; |
| 485 |
memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
|
| 486 |
} |
| 487 |
|
| 488 |
iscsi_schedule_bh(acb); |
| 489 |
} |
| 490 |
|
| 491 |
static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
|
| 492 |
unsigned long int req, void *buf, |
| 493 |
BlockDriverCompletionFunc *cb, void *opaque)
|
| 494 |
{
|
| 495 |
IscsiLun *iscsilun = bs->opaque; |
| 496 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
| 497 |
struct iscsi_data data;
|
| 498 |
IscsiAIOCB *acb; |
| 499 |
|
| 500 |
assert(req == SG_IO); |
| 501 |
|
| 502 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
| 503 |
|
| 504 |
acb->iscsilun = iscsilun; |
| 505 |
acb->canceled = 0;
|
| 506 |
acb->bh = NULL;
|
| 507 |
acb->status = -EINPROGRESS; |
| 508 |
acb->buf = NULL;
|
| 509 |
acb->ioh = buf; |
| 510 |
|
| 511 |
acb->task = malloc(sizeof(struct scsi_task)); |
| 512 |
if (acb->task == NULL) { |
| 513 |
error_report("iSCSI: Failed to allocate task for scsi command. %s",
|
| 514 |
iscsi_get_error(iscsi)); |
| 515 |
qemu_aio_release(acb); |
| 516 |
return NULL; |
| 517 |
} |
| 518 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
| 519 |
|
| 520 |
switch (acb->ioh->dxfer_direction) {
|
| 521 |
case SG_DXFER_TO_DEV:
|
| 522 |
acb->task->xfer_dir = SCSI_XFER_WRITE; |
| 523 |
break;
|
| 524 |
case SG_DXFER_FROM_DEV:
|
| 525 |
acb->task->xfer_dir = SCSI_XFER_READ; |
| 526 |
break;
|
| 527 |
default:
|
| 528 |
acb->task->xfer_dir = SCSI_XFER_NONE; |
| 529 |
break;
|
| 530 |
} |
| 531 |
|
| 532 |
acb->task->cdb_size = acb->ioh->cmd_len; |
| 533 |
memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
|
| 534 |
acb->task->expxferlen = acb->ioh->dxfer_len; |
| 535 |
|
| 536 |
data.size = 0;
|
| 537 |
if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
|
| 538 |
if (acb->ioh->iovec_count == 0) { |
| 539 |
data.data = acb->ioh->dxferp; |
| 540 |
data.size = acb->ioh->dxfer_len; |
| 541 |
} else {
|
| 542 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 543 |
scsi_task_set_iov_out(acb->task, |
| 544 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
| 545 |
acb->ioh->iovec_count); |
| 546 |
#else
|
| 547 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
| 548 |
|
| 549 |
acb->buf = g_malloc(acb->ioh->dxfer_len); |
| 550 |
data.data = acb->buf; |
| 551 |
data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0,
|
| 552 |
acb->buf, acb->ioh->dxfer_len); |
| 553 |
#endif
|
| 554 |
} |
| 555 |
} |
| 556 |
|
| 557 |
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
|
| 558 |
iscsi_aio_ioctl_cb, |
| 559 |
(data.size > 0) ? &data : NULL, |
| 560 |
acb) != 0) {
|
| 561 |
scsi_free_scsi_task(acb->task); |
| 562 |
qemu_aio_release(acb); |
| 563 |
return NULL; |
| 564 |
} |
| 565 |
|
| 566 |
/* tell libiscsi to read straight into the buffer we got from ioctl */
|
| 567 |
if (acb->task->xfer_dir == SCSI_XFER_READ) {
|
| 568 |
if (acb->ioh->iovec_count == 0) { |
| 569 |
scsi_task_add_data_in_buffer(acb->task, |
| 570 |
acb->ioh->dxfer_len, |
| 571 |
acb->ioh->dxferp); |
| 572 |
} else {
|
| 573 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 574 |
scsi_task_set_iov_in(acb->task, |
| 575 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
| 576 |
acb->ioh->iovec_count); |
| 577 |
#else
|
| 578 |
int i;
|
| 579 |
for (i = 0; i < acb->ioh->iovec_count; i++) { |
| 580 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
| 581 |
|
| 582 |
scsi_task_add_data_in_buffer(acb->task, |
| 583 |
iov[i].iov_len, |
| 584 |
iov[i].iov_base); |
| 585 |
} |
| 586 |
#endif
|
| 587 |
} |
| 588 |
} |
| 589 |
|
| 590 |
iscsi_set_events(iscsilun); |
| 591 |
|
| 592 |
return &acb->common;
|
| 593 |
} |
| 594 |
|
| 595 |
|
| 596 |
static void ioctl_cb(void *opaque, int status) |
| 597 |
{
|
| 598 |
int *p_status = opaque;
|
| 599 |
*p_status = status; |
| 600 |
} |
| 601 |
|
| 602 |
static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
| 603 |
{
|
| 604 |
IscsiLun *iscsilun = bs->opaque; |
| 605 |
int status;
|
| 606 |
|
| 607 |
switch (req) {
|
| 608 |
case SG_GET_VERSION_NUM:
|
| 609 |
*(int *)buf = 30000; |
| 610 |
break;
|
| 611 |
case SG_GET_SCSI_ID:
|
| 612 |
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
|
| 613 |
break;
|
| 614 |
case SG_IO:
|
| 615 |
status = -EINPROGRESS; |
| 616 |
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); |
| 617 |
|
| 618 |
while (status == -EINPROGRESS) {
|
| 619 |
qemu_aio_wait(); |
| 620 |
} |
| 621 |
|
| 622 |
return 0; |
| 623 |
default:
|
| 624 |
return -1; |
| 625 |
} |
| 626 |
return 0; |
| 627 |
} |
| 628 |
#endif
|
| 629 |
|
| 630 |
static int64_t
|
| 631 |
iscsi_getlength(BlockDriverState *bs) |
| 632 |
{
|
| 633 |
IscsiLun *iscsilun = bs->opaque; |
| 634 |
int64_t len; |
| 635 |
|
| 636 |
len = iscsilun->num_blocks; |
| 637 |
len *= iscsilun->block_size; |
| 638 |
|
| 639 |
return len;
|
| 640 |
} |
| 641 |
|
| 642 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 643 |
|
| 644 |
static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs,
|
| 645 |
int64_t sector_num, |
| 646 |
int nb_sectors, int *pnum) |
| 647 |
{
|
| 648 |
IscsiLun *iscsilun = bs->opaque; |
| 649 |
struct scsi_get_lba_status *lbas = NULL; |
| 650 |
struct scsi_lba_status_descriptor *lbasd = NULL; |
| 651 |
struct IscsiTask iTask;
|
| 652 |
int64_t ret; |
| 653 |
|
| 654 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 655 |
|
| 656 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
| 657 |
ret = -EINVAL; |
| 658 |
goto out;
|
| 659 |
} |
| 660 |
|
| 661 |
/* default to all sectors allocated */
|
| 662 |
ret = BDRV_BLOCK_DATA; |
| 663 |
ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; |
| 664 |
*pnum = nb_sectors; |
| 665 |
|
| 666 |
/* LUN does not support logical block provisioning */
|
| 667 |
if (iscsilun->lbpme == 0) { |
| 668 |
goto out;
|
| 669 |
} |
| 670 |
|
| 671 |
retry:
|
| 672 |
if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun,
|
| 673 |
sector_qemu2lun(sector_num, iscsilun), |
| 674 |
8 + 16, iscsi_co_generic_cb, |
| 675 |
&iTask) == NULL) {
|
| 676 |
ret = -ENOMEM; |
| 677 |
goto out;
|
| 678 |
} |
| 679 |
|
| 680 |
while (!iTask.complete) {
|
| 681 |
iscsi_set_events(iscsilun); |
| 682 |
qemu_coroutine_yield(); |
| 683 |
} |
| 684 |
|
| 685 |
if (iTask.do_retry) {
|
| 686 |
if (iTask.task != NULL) { |
| 687 |
scsi_free_scsi_task(iTask.task); |
| 688 |
iTask.task = NULL;
|
| 689 |
} |
| 690 |
iTask.complete = 0;
|
| 691 |
goto retry;
|
| 692 |
} |
| 693 |
|
| 694 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 695 |
/* in case the get_lba_status_callout fails (i.e.
|
| 696 |
* because the device is busy or the cmd is not
|
| 697 |
* supported) we pretend all blocks are allocated
|
| 698 |
* for backwards compatibility */
|
| 699 |
goto out;
|
| 700 |
} |
| 701 |
|
| 702 |
lbas = scsi_datain_unmarshall(iTask.task); |
| 703 |
if (lbas == NULL) { |
| 704 |
ret = -EIO; |
| 705 |
goto out;
|
| 706 |
} |
| 707 |
|
| 708 |
lbasd = &lbas->descriptors[0];
|
| 709 |
|
| 710 |
if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) {
|
| 711 |
ret = -EIO; |
| 712 |
goto out;
|
| 713 |
} |
| 714 |
|
| 715 |
*pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); |
| 716 |
if (*pnum > nb_sectors) {
|
| 717 |
*pnum = nb_sectors; |
| 718 |
} |
| 719 |
|
| 720 |
if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED ||
|
| 721 |
lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) {
|
| 722 |
ret &= ~BDRV_BLOCK_DATA; |
| 723 |
if (iscsilun->lbprz) {
|
| 724 |
ret |= BDRV_BLOCK_ZERO; |
| 725 |
} |
| 726 |
} |
| 727 |
|
| 728 |
out:
|
| 729 |
if (iTask.task != NULL) { |
| 730 |
scsi_free_scsi_task(iTask.task); |
| 731 |
} |
| 732 |
return ret;
|
| 733 |
} |
| 734 |
|
| 735 |
#endif /* LIBISCSI_FEATURE_IOVECTOR */ |
| 736 |
|
| 737 |
static int |
| 738 |
coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, |
| 739 |
int nb_sectors)
|
| 740 |
{
|
| 741 |
IscsiLun *iscsilun = bs->opaque; |
| 742 |
struct IscsiTask iTask;
|
| 743 |
struct unmap_list list;
|
| 744 |
|
| 745 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
| 746 |
return -EINVAL;
|
| 747 |
} |
| 748 |
|
| 749 |
if (!iscsilun->lbp.lbpu) {
|
| 750 |
/* UNMAP is not supported by the target */
|
| 751 |
return 0; |
| 752 |
} |
| 753 |
|
| 754 |
list.lba = sector_qemu2lun(sector_num, iscsilun); |
| 755 |
list.num = sector_qemu2lun(nb_sectors, iscsilun); |
| 756 |
|
| 757 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 758 |
retry:
|
| 759 |
if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
| 760 |
iscsi_co_generic_cb, &iTask) == NULL) {
|
| 761 |
return -ENOMEM;
|
| 762 |
} |
| 763 |
|
| 764 |
while (!iTask.complete) {
|
| 765 |
iscsi_set_events(iscsilun); |
| 766 |
qemu_coroutine_yield(); |
| 767 |
} |
| 768 |
|
| 769 |
if (iTask.task != NULL) { |
| 770 |
scsi_free_scsi_task(iTask.task); |
| 771 |
iTask.task = NULL;
|
| 772 |
} |
| 773 |
|
| 774 |
if (iTask.do_retry) {
|
| 775 |
iTask.complete = 0;
|
| 776 |
goto retry;
|
| 777 |
} |
| 778 |
|
| 779 |
if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
|
| 780 |
/* the target might fail with a check condition if it
|
| 781 |
is not happy with the alignment of the UNMAP request
|
| 782 |
we silently fail in this case */
|
| 783 |
return 0; |
| 784 |
} |
| 785 |
|
| 786 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 787 |
return -EIO;
|
| 788 |
} |
| 789 |
|
| 790 |
return 0; |
| 791 |
} |
| 792 |
|
| 793 |
#if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED)
|
| 794 |
|
| 795 |
static int |
| 796 |
coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, |
| 797 |
int nb_sectors, BdrvRequestFlags flags)
|
| 798 |
{
|
| 799 |
IscsiLun *iscsilun = bs->opaque; |
| 800 |
struct IscsiTask iTask;
|
| 801 |
uint64_t lba; |
| 802 |
uint32_t nb_blocks; |
| 803 |
|
| 804 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
| 805 |
return -EINVAL;
|
| 806 |
} |
| 807 |
|
| 808 |
if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
|
| 809 |
/* WRITE SAME without UNMAP is not supported by the target */
|
| 810 |
return -ENOTSUP;
|
| 811 |
} |
| 812 |
|
| 813 |
if ((flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->lbp.lbpws) {
|
| 814 |
/* WRITE SAME with UNMAP is not supported by the target */
|
| 815 |
return -ENOTSUP;
|
| 816 |
} |
| 817 |
|
| 818 |
lba = sector_qemu2lun(sector_num, iscsilun); |
| 819 |
nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); |
| 820 |
|
| 821 |
if (iscsilun->zeroblock == NULL) { |
| 822 |
iscsilun->zeroblock = g_malloc0(iscsilun->block_size); |
| 823 |
} |
| 824 |
|
| 825 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
| 826 |
retry:
|
| 827 |
if (iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
|
| 828 |
iscsilun->zeroblock, iscsilun->block_size, |
| 829 |
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
|
| 830 |
0, 0, iscsi_co_generic_cb, &iTask) == NULL) { |
| 831 |
return -ENOMEM;
|
| 832 |
} |
| 833 |
|
| 834 |
while (!iTask.complete) {
|
| 835 |
iscsi_set_events(iscsilun); |
| 836 |
qemu_coroutine_yield(); |
| 837 |
} |
| 838 |
|
| 839 |
if (iTask.task != NULL) { |
| 840 |
scsi_free_scsi_task(iTask.task); |
| 841 |
iTask.task = NULL;
|
| 842 |
} |
| 843 |
|
| 844 |
if (iTask.do_retry) {
|
| 845 |
iTask.complete = 0;
|
| 846 |
goto retry;
|
| 847 |
} |
| 848 |
|
| 849 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
| 850 |
if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
|
| 851 |
iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && |
| 852 |
iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) {
|
| 853 |
/* WRITE SAME is not supported by the target */
|
| 854 |
iscsilun->has_write_same = false;
|
| 855 |
return -ENOTSUP;
|
| 856 |
} |
| 857 |
|
| 858 |
return -EIO;
|
| 859 |
} |
| 860 |
|
| 861 |
return 0; |
| 862 |
} |
| 863 |
|
| 864 |
#endif /* SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED */ |
| 865 |
|
| 866 |
static void parse_chap(struct iscsi_context *iscsi, const char *target, |
| 867 |
Error **errp) |
| 868 |
{
|
| 869 |
QemuOptsList *list; |
| 870 |
QemuOpts *opts; |
| 871 |
const char *user = NULL; |
| 872 |
const char *password = NULL; |
| 873 |
|
| 874 |
list = qemu_find_opts("iscsi");
|
| 875 |
if (!list) {
|
| 876 |
return;
|
| 877 |
} |
| 878 |
|
| 879 |
opts = qemu_opts_find(list, target); |
| 880 |
if (opts == NULL) { |
| 881 |
opts = QTAILQ_FIRST(&list->head); |
| 882 |
if (!opts) {
|
| 883 |
return;
|
| 884 |
} |
| 885 |
} |
| 886 |
|
| 887 |
user = qemu_opt_get(opts, "user");
|
| 888 |
if (!user) {
|
| 889 |
return;
|
| 890 |
} |
| 891 |
|
| 892 |
password = qemu_opt_get(opts, "password");
|
| 893 |
if (!password) {
|
| 894 |
error_setg(errp, "CHAP username specified but no password was given");
|
| 895 |
return;
|
| 896 |
} |
| 897 |
|
| 898 |
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
| 899 |
error_setg(errp, "Failed to set initiator username and password");
|
| 900 |
} |
| 901 |
} |
| 902 |
|
| 903 |
static void parse_header_digest(struct iscsi_context *iscsi, const char *target, |
| 904 |
Error **errp) |
| 905 |
{
|
| 906 |
QemuOptsList *list; |
| 907 |
QemuOpts *opts; |
| 908 |
const char *digest = NULL; |
| 909 |
|
| 910 |
list = qemu_find_opts("iscsi");
|
| 911 |
if (!list) {
|
| 912 |
return;
|
| 913 |
} |
| 914 |
|
| 915 |
opts = qemu_opts_find(list, target); |
| 916 |
if (opts == NULL) { |
| 917 |
opts = QTAILQ_FIRST(&list->head); |
| 918 |
if (!opts) {
|
| 919 |
return;
|
| 920 |
} |
| 921 |
} |
| 922 |
|
| 923 |
digest = qemu_opt_get(opts, "header-digest");
|
| 924 |
if (!digest) {
|
| 925 |
return;
|
| 926 |
} |
| 927 |
|
| 928 |
if (!strcmp(digest, "CRC32C")) { |
| 929 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); |
| 930 |
} else if (!strcmp(digest, "NONE")) { |
| 931 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); |
| 932 |
} else if (!strcmp(digest, "CRC32C-NONE")) { |
| 933 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); |
| 934 |
} else if (!strcmp(digest, "NONE-CRC32C")) { |
| 935 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
| 936 |
} else {
|
| 937 |
error_setg(errp, "Invalid header-digest setting : %s", digest);
|
| 938 |
} |
| 939 |
} |
| 940 |
|
| 941 |
static char *parse_initiator_name(const char *target) |
| 942 |
{
|
| 943 |
QemuOptsList *list; |
| 944 |
QemuOpts *opts; |
| 945 |
const char *name; |
| 946 |
char *iscsi_name;
|
| 947 |
UuidInfo *uuid_info; |
| 948 |
|
| 949 |
list = qemu_find_opts("iscsi");
|
| 950 |
if (list) {
|
| 951 |
opts = qemu_opts_find(list, target); |
| 952 |
if (!opts) {
|
| 953 |
opts = QTAILQ_FIRST(&list->head); |
| 954 |
} |
| 955 |
if (opts) {
|
| 956 |
name = qemu_opt_get(opts, "initiator-name");
|
| 957 |
if (name) {
|
| 958 |
return g_strdup(name);
|
| 959 |
} |
| 960 |
} |
| 961 |
} |
| 962 |
|
| 963 |
uuid_info = qmp_query_uuid(NULL);
|
| 964 |
if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { |
| 965 |
name = qemu_get_vm_name(); |
| 966 |
} else {
|
| 967 |
name = uuid_info->UUID; |
| 968 |
} |
| 969 |
iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
|
| 970 |
name ? ":" : "", name ? name : ""); |
| 971 |
qapi_free_UuidInfo(uuid_info); |
| 972 |
return iscsi_name;
|
| 973 |
} |
| 974 |
|
| 975 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
| 976 |
static void iscsi_nop_timed_event(void *opaque) |
| 977 |
{
|
| 978 |
IscsiLun *iscsilun = opaque; |
| 979 |
|
| 980 |
if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) {
|
| 981 |
error_report("iSCSI: NOP timeout. Reconnecting...");
|
| 982 |
iscsi_reconnect(iscsilun->iscsi); |
| 983 |
} |
| 984 |
|
| 985 |
if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { |
| 986 |
error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
|
| 987 |
return;
|
| 988 |
} |
| 989 |
|
| 990 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
| 991 |
iscsi_set_events(iscsilun); |
| 992 |
} |
| 993 |
#endif
|
| 994 |
|
| 995 |
static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp) |
| 996 |
{
|
| 997 |
struct scsi_task *task = NULL; |
| 998 |
struct scsi_readcapacity10 *rc10 = NULL; |
| 999 |
struct scsi_readcapacity16 *rc16 = NULL; |
| 1000 |
int retries = ISCSI_CMD_RETRIES;
|
| 1001 |
|
| 1002 |
do {
|
| 1003 |
if (task != NULL) { |
| 1004 |
scsi_free_scsi_task(task); |
| 1005 |
task = NULL;
|
| 1006 |
} |
| 1007 |
|
| 1008 |
switch (iscsilun->type) {
|
| 1009 |
case TYPE_DISK:
|
| 1010 |
task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); |
| 1011 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
| 1012 |
rc16 = scsi_datain_unmarshall(task); |
| 1013 |
if (rc16 == NULL) { |
| 1014 |
error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data.");
|
| 1015 |
} else {
|
| 1016 |
iscsilun->block_size = rc16->block_length; |
| 1017 |
iscsilun->num_blocks = rc16->returned_lba + 1;
|
| 1018 |
iscsilun->lbpme = rc16->lbpme; |
| 1019 |
iscsilun->lbprz = rc16->lbprz; |
| 1020 |
} |
| 1021 |
} |
| 1022 |
break;
|
| 1023 |
case TYPE_ROM:
|
| 1024 |
task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); |
| 1025 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
| 1026 |
rc10 = scsi_datain_unmarshall(task); |
| 1027 |
if (rc10 == NULL) { |
| 1028 |
error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data.");
|
| 1029 |
} else {
|
| 1030 |
iscsilun->block_size = rc10->block_size; |
| 1031 |
if (rc10->lba == 0) { |
| 1032 |
/* blank disk loaded */
|
| 1033 |
iscsilun->num_blocks = 0;
|
| 1034 |
} else {
|
| 1035 |
iscsilun->num_blocks = rc10->lba + 1;
|
| 1036 |
} |
| 1037 |
} |
| 1038 |
} |
| 1039 |
break;
|
| 1040 |
default:
|
| 1041 |
return;
|
| 1042 |
} |
| 1043 |
} while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
| 1044 |
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
| 1045 |
&& retries-- > 0);
|
| 1046 |
|
| 1047 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
| 1048 |
error_setg(errp, "iSCSI: failed to send readcapacity10 command.");
|
| 1049 |
} |
| 1050 |
if (task) {
|
| 1051 |
scsi_free_scsi_task(task); |
| 1052 |
} |
| 1053 |
} |
| 1054 |
|
| 1055 |
/* TODO Convert to fine grained options */
|
| 1056 |
static QemuOptsList runtime_opts = {
|
| 1057 |
.name = "iscsi",
|
| 1058 |
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), |
| 1059 |
.desc = {
|
| 1060 |
{
|
| 1061 |
.name = "filename",
|
| 1062 |
.type = QEMU_OPT_STRING, |
| 1063 |
.help = "URL to the iscsi image",
|
| 1064 |
}, |
| 1065 |
{ /* end of list */ }
|
| 1066 |
}, |
| 1067 |
}; |
| 1068 |
|
| 1069 |
static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun, |
| 1070 |
int evpd, int pc, void **inq, Error **errp) |
| 1071 |
{
|
| 1072 |
int full_size;
|
| 1073 |
struct scsi_task *task = NULL; |
| 1074 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
|
| 1075 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
| 1076 |
goto fail;
|
| 1077 |
} |
| 1078 |
full_size = scsi_datain_getfullsize(task); |
| 1079 |
if (full_size > task->datain.size) {
|
| 1080 |
scsi_free_scsi_task(task); |
| 1081 |
|
| 1082 |
/* we need more data for the full list */
|
| 1083 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); |
| 1084 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
| 1085 |
goto fail;
|
| 1086 |
} |
| 1087 |
} |
| 1088 |
|
| 1089 |
*inq = scsi_datain_unmarshall(task); |
| 1090 |
if (*inq == NULL) { |
| 1091 |
error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob");
|
| 1092 |
goto fail;
|
| 1093 |
} |
| 1094 |
|
| 1095 |
return task;
|
| 1096 |
|
| 1097 |
fail:
|
| 1098 |
error_setg(errp, "iSCSI: Inquiry command failed : %s",
|
| 1099 |
iscsi_get_error(iscsi)); |
| 1100 |
if (task != NULL) { |
| 1101 |
scsi_free_scsi_task(task); |
| 1102 |
} |
| 1103 |
return NULL; |
| 1104 |
} |
| 1105 |
|
| 1106 |
/*
|
| 1107 |
* We support iscsi url's on the form
|
| 1108 |
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
| 1109 |
*
|
| 1110 |
* Note: flags are currently not used by iscsi_open. If this function
|
| 1111 |
* is changed such that flags are used, please examine iscsi_reopen_prepare()
|
| 1112 |
* to see if needs to be changed as well.
|
| 1113 |
*/
|
| 1114 |
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
| 1115 |
Error **errp) |
| 1116 |
{
|
| 1117 |
IscsiLun *iscsilun = bs->opaque; |
| 1118 |
struct iscsi_context *iscsi = NULL; |
| 1119 |
struct iscsi_url *iscsi_url = NULL; |
| 1120 |
struct scsi_task *task = NULL; |
| 1121 |
struct scsi_inquiry_standard *inq = NULL; |
| 1122 |
struct scsi_inquiry_supported_pages *inq_vpd;
|
| 1123 |
char *initiator_name = NULL; |
| 1124 |
QemuOpts *opts; |
| 1125 |
Error *local_err = NULL;
|
| 1126 |
const char *filename; |
| 1127 |
int i, ret;
|
| 1128 |
|
| 1129 |
if ((BDRV_SECTOR_SIZE % 512) != 0) { |
| 1130 |
error_setg(errp, "iSCSI: Invalid BDRV_SECTOR_SIZE. "
|
| 1131 |
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
|
| 1132 |
"of 512", BDRV_SECTOR_SIZE);
|
| 1133 |
return -EINVAL;
|
| 1134 |
} |
| 1135 |
|
| 1136 |
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
| 1137 |
qemu_opts_absorb_qdict(opts, options, &local_err); |
| 1138 |
if (local_err) {
|
| 1139 |
error_propagate(errp, local_err); |
| 1140 |
ret = -EINVAL; |
| 1141 |
goto out;
|
| 1142 |
} |
| 1143 |
|
| 1144 |
filename = qemu_opt_get(opts, "filename");
|
| 1145 |
|
| 1146 |
iscsi_url = iscsi_parse_full_url(iscsi, filename); |
| 1147 |
if (iscsi_url == NULL) { |
| 1148 |
error_setg(errp, "Failed to parse URL : %s", filename);
|
| 1149 |
ret = -EINVAL; |
| 1150 |
goto out;
|
| 1151 |
} |
| 1152 |
|
| 1153 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
| 1154 |
|
| 1155 |
initiator_name = parse_initiator_name(iscsi_url->target); |
| 1156 |
|
| 1157 |
iscsi = iscsi_create_context(initiator_name); |
| 1158 |
if (iscsi == NULL) { |
| 1159 |
error_setg(errp, "iSCSI: Failed to create iSCSI context.");
|
| 1160 |
ret = -ENOMEM; |
| 1161 |
goto out;
|
| 1162 |
} |
| 1163 |
|
| 1164 |
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
| 1165 |
error_setg(errp, "iSCSI: Failed to set target name.");
|
| 1166 |
ret = -EINVAL; |
| 1167 |
goto out;
|
| 1168 |
} |
| 1169 |
|
| 1170 |
if (iscsi_url->user != NULL) { |
| 1171 |
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, |
| 1172 |
iscsi_url->passwd); |
| 1173 |
if (ret != 0) { |
| 1174 |
error_setg(errp, "Failed to set initiator username and password");
|
| 1175 |
ret = -EINVAL; |
| 1176 |
goto out;
|
| 1177 |
} |
| 1178 |
} |
| 1179 |
|
| 1180 |
/* check if we got CHAP username/password via the options */
|
| 1181 |
parse_chap(iscsi, iscsi_url->target, &local_err); |
| 1182 |
if (local_err != NULL) { |
| 1183 |
error_propagate(errp, local_err); |
| 1184 |
ret = -EINVAL; |
| 1185 |
goto out;
|
| 1186 |
} |
| 1187 |
|
| 1188 |
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
| 1189 |
error_setg(errp, "iSCSI: Failed to set session type to normal.");
|
| 1190 |
ret = -EINVAL; |
| 1191 |
goto out;
|
| 1192 |
} |
| 1193 |
|
| 1194 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
| 1195 |
|
| 1196 |
/* check if we got HEADER_DIGEST via the options */
|
| 1197 |
parse_header_digest(iscsi, iscsi_url->target, &local_err); |
| 1198 |
if (local_err != NULL) { |
| 1199 |
error_propagate(errp, local_err); |
| 1200 |
ret = -EINVAL; |
| 1201 |
goto out;
|
| 1202 |
} |
| 1203 |
|
| 1204 |
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
| 1205 |
error_setg(errp, "iSCSI: Failed to connect to LUN : %s",
|
| 1206 |
iscsi_get_error(iscsi)); |
| 1207 |
ret = -EINVAL; |
| 1208 |
goto out;
|
| 1209 |
} |
| 1210 |
|
| 1211 |
iscsilun->iscsi = iscsi; |
| 1212 |
iscsilun->lun = iscsi_url->lun; |
| 1213 |
iscsilun->has_write_same = true;
|
| 1214 |
|
| 1215 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0, |
| 1216 |
(void **) &inq, errp);
|
| 1217 |
if (task == NULL) { |
| 1218 |
ret = -EINVAL; |
| 1219 |
goto out;
|
| 1220 |
} |
| 1221 |
iscsilun->type = inq->periperal_device_type; |
| 1222 |
scsi_free_scsi_task(task); |
| 1223 |
task = NULL;
|
| 1224 |
|
| 1225 |
iscsi_readcapacity_sync(iscsilun, &local_err); |
| 1226 |
if (local_err != NULL) { |
| 1227 |
error_propagate(errp, local_err); |
| 1228 |
goto out;
|
| 1229 |
} |
| 1230 |
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
| 1231 |
bs->request_alignment = iscsilun->block_size; |
| 1232 |
|
| 1233 |
/* Medium changer or tape. We dont have any emulation for this so this must
|
| 1234 |
* be sg ioctl compatible. We force it to be sg, otherwise qemu will try
|
| 1235 |
* to read from the device to guess the image format.
|
| 1236 |
*/
|
| 1237 |
if (iscsilun->type == TYPE_MEDIUM_CHANGER ||
|
| 1238 |
iscsilun->type == TYPE_TAPE) {
|
| 1239 |
bs->sg = 1;
|
| 1240 |
} |
| 1241 |
|
| 1242 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
| 1243 |
SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES, |
| 1244 |
(void **) &inq_vpd, errp);
|
| 1245 |
if (task == NULL) { |
| 1246 |
ret = -EINVAL; |
| 1247 |
goto out;
|
| 1248 |
} |
| 1249 |
for (i = 0; i < inq_vpd->num_pages; i++) { |
| 1250 |
struct scsi_task *inq_task;
|
| 1251 |
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
|
| 1252 |
struct scsi_inquiry_block_limits *inq_bl;
|
| 1253 |
switch (inq_vpd->pages[i]) {
|
| 1254 |
case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
|
| 1255 |
inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
| 1256 |
SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING, |
| 1257 |
(void **) &inq_lbp, errp);
|
| 1258 |
if (inq_task == NULL) { |
| 1259 |
ret = -EINVAL; |
| 1260 |
goto out;
|
| 1261 |
} |
| 1262 |
memcpy(&iscsilun->lbp, inq_lbp, |
| 1263 |
sizeof(struct scsi_inquiry_logical_block_provisioning)); |
| 1264 |
scsi_free_scsi_task(inq_task); |
| 1265 |
break;
|
| 1266 |
case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS:
|
| 1267 |
inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
| 1268 |
SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS, |
| 1269 |
(void **) &inq_bl, errp);
|
| 1270 |
if (inq_task == NULL) { |
| 1271 |
ret = -EINVAL; |
| 1272 |
goto out;
|
| 1273 |
} |
| 1274 |
memcpy(&iscsilun->bl, inq_bl, |
| 1275 |
sizeof(struct scsi_inquiry_block_limits)); |
| 1276 |
scsi_free_scsi_task(inq_task); |
| 1277 |
break;
|
| 1278 |
default:
|
| 1279 |
break;
|
| 1280 |
} |
| 1281 |
} |
| 1282 |
scsi_free_scsi_task(task); |
| 1283 |
task = NULL;
|
| 1284 |
|
| 1285 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
| 1286 |
/* Set up a timer for sending out iSCSI NOPs */
|
| 1287 |
iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
| 1288 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
| 1289 |
#endif
|
| 1290 |
|
| 1291 |
out:
|
| 1292 |
qemu_opts_del(opts); |
| 1293 |
if (initiator_name != NULL) { |
| 1294 |
g_free(initiator_name); |
| 1295 |
} |
| 1296 |
if (iscsi_url != NULL) { |
| 1297 |
iscsi_destroy_url(iscsi_url); |
| 1298 |
} |
| 1299 |
if (task != NULL) { |
| 1300 |
scsi_free_scsi_task(task); |
| 1301 |
} |
| 1302 |
|
| 1303 |
if (ret) {
|
| 1304 |
if (iscsi != NULL) { |
| 1305 |
iscsi_destroy_context(iscsi); |
| 1306 |
} |
| 1307 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
| 1308 |
} |
| 1309 |
return ret;
|
| 1310 |
} |
| 1311 |
|
| 1312 |
static void iscsi_close(BlockDriverState *bs) |
| 1313 |
{
|
| 1314 |
IscsiLun *iscsilun = bs->opaque; |
| 1315 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
| 1316 |
|
| 1317 |
if (iscsilun->nop_timer) {
|
| 1318 |
timer_del(iscsilun->nop_timer); |
| 1319 |
timer_free(iscsilun->nop_timer); |
| 1320 |
} |
| 1321 |
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
| 1322 |
iscsi_destroy_context(iscsi); |
| 1323 |
g_free(iscsilun->zeroblock); |
| 1324 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
| 1325 |
} |
| 1326 |
|
| 1327 |
static int iscsi_refresh_limits(BlockDriverState *bs) |
| 1328 |
{
|
| 1329 |
IscsiLun *iscsilun = bs->opaque; |
| 1330 |
|
| 1331 |
/* We don't actually refresh here, but just return data queried in
|
| 1332 |
* iscsi_open(): iscsi targets don't change their limits. */
|
| 1333 |
if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
|
| 1334 |
if (iscsilun->bl.max_unmap < 0xffffffff) { |
| 1335 |
bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, |
| 1336 |
iscsilun); |
| 1337 |
} |
| 1338 |
bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, |
| 1339 |
iscsilun); |
| 1340 |
|
| 1341 |
if (iscsilun->bl.max_ws_len < 0xffffffff) { |
| 1342 |
bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, |
| 1343 |
iscsilun); |
| 1344 |
} |
| 1345 |
bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, |
| 1346 |
iscsilun); |
| 1347 |
} |
| 1348 |
bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len, |
| 1349 |
iscsilun); |
| 1350 |
return 0; |
| 1351 |
} |
| 1352 |
|
| 1353 |
/* Since iscsi_open() ignores bdrv_flags, there is nothing to do here in
|
| 1354 |
* prepare. Note that this will not re-establish a connection with an iSCSI
|
| 1355 |
* target - it is effectively a NOP. */
|
| 1356 |
static int iscsi_reopen_prepare(BDRVReopenState *state, |
| 1357 |
BlockReopenQueue *queue, Error **errp) |
| 1358 |
{
|
| 1359 |
/* NOP */
|
| 1360 |
return 0; |
| 1361 |
} |
| 1362 |
|
| 1363 |
static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
| 1364 |
{
|
| 1365 |
IscsiLun *iscsilun = bs->opaque; |
| 1366 |
Error *local_err = NULL;
|
| 1367 |
|
| 1368 |
if (iscsilun->type != TYPE_DISK) {
|
| 1369 |
return -ENOTSUP;
|
| 1370 |
} |
| 1371 |
|
| 1372 |
iscsi_readcapacity_sync(iscsilun, &local_err); |
| 1373 |
if (local_err != NULL) { |
| 1374 |
error_free(local_err); |
| 1375 |
return -EIO;
|
| 1376 |
} |
| 1377 |
|
| 1378 |
if (offset > iscsi_getlength(bs)) {
|
| 1379 |
return -EINVAL;
|
| 1380 |
} |
| 1381 |
|
| 1382 |
return 0; |
| 1383 |
} |
| 1384 |
|
| 1385 |
static int iscsi_create(const char *filename, QEMUOptionParameter *options, |
| 1386 |
Error **errp) |
| 1387 |
{
|
| 1388 |
int ret = 0; |
| 1389 |
int64_t total_size = 0;
|
| 1390 |
BlockDriverState *bs; |
| 1391 |
IscsiLun *iscsilun = NULL;
|
| 1392 |
QDict *bs_options; |
| 1393 |
|
| 1394 |
bs = bdrv_new("");
|
| 1395 |
|
| 1396 |
/* Read out options */
|
| 1397 |
while (options && options->name) {
|
| 1398 |
if (!strcmp(options->name, "size")) { |
| 1399 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
| 1400 |
} |
| 1401 |
options++; |
| 1402 |
} |
| 1403 |
|
| 1404 |
bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
| 1405 |
iscsilun = bs->opaque; |
| 1406 |
|
| 1407 |
bs_options = qdict_new(); |
| 1408 |
qdict_put(bs_options, "filename", qstring_from_str(filename));
|
| 1409 |
ret = iscsi_open(bs, bs_options, 0, NULL); |
| 1410 |
QDECREF(bs_options); |
| 1411 |
|
| 1412 |
if (ret != 0) { |
| 1413 |
goto out;
|
| 1414 |
} |
| 1415 |
if (iscsilun->nop_timer) {
|
| 1416 |
timer_del(iscsilun->nop_timer); |
| 1417 |
timer_free(iscsilun->nop_timer); |
| 1418 |
} |
| 1419 |
if (iscsilun->type != TYPE_DISK) {
|
| 1420 |
ret = -ENODEV; |
| 1421 |
goto out;
|
| 1422 |
} |
| 1423 |
if (bs->total_sectors < total_size) {
|
| 1424 |
ret = -ENOSPC; |
| 1425 |
goto out;
|
| 1426 |
} |
| 1427 |
|
| 1428 |
ret = 0;
|
| 1429 |
out:
|
| 1430 |
if (iscsilun->iscsi != NULL) { |
| 1431 |
iscsi_destroy_context(iscsilun->iscsi); |
| 1432 |
} |
| 1433 |
g_free(bs->opaque); |
| 1434 |
bs->opaque = NULL;
|
| 1435 |
bdrv_unref(bs); |
| 1436 |
return ret;
|
| 1437 |
} |
| 1438 |
|
| 1439 |
static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 1440 |
{
|
| 1441 |
IscsiLun *iscsilun = bs->opaque; |
| 1442 |
bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz; |
| 1443 |
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; |
| 1444 |
/* Guess the internal cluster (page) size of the iscsi target by the means
|
| 1445 |
* of opt_unmap_gran. Transfer the unmap granularity only if it has a
|
| 1446 |
* reasonable size for bdi->cluster_size */
|
| 1447 |
if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 && |
| 1448 |
iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { |
| 1449 |
bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size; |
| 1450 |
} |
| 1451 |
return 0; |
| 1452 |
} |
| 1453 |
|
| 1454 |
static QEMUOptionParameter iscsi_create_options[] = {
|
| 1455 |
{
|
| 1456 |
.name = BLOCK_OPT_SIZE, |
| 1457 |
.type = OPT_SIZE, |
| 1458 |
.help = "Virtual disk size"
|
| 1459 |
}, |
| 1460 |
{ NULL }
|
| 1461 |
}; |
| 1462 |
|
| 1463 |
static BlockDriver bdrv_iscsi = {
|
| 1464 |
.format_name = "iscsi",
|
| 1465 |
.protocol_name = "iscsi",
|
| 1466 |
|
| 1467 |
.instance_size = sizeof(IscsiLun),
|
| 1468 |
.bdrv_needs_filename = true,
|
| 1469 |
.bdrv_file_open = iscsi_open, |
| 1470 |
.bdrv_close = iscsi_close, |
| 1471 |
.bdrv_create = iscsi_create, |
| 1472 |
.create_options = iscsi_create_options, |
| 1473 |
.bdrv_reopen_prepare = iscsi_reopen_prepare, |
| 1474 |
|
| 1475 |
.bdrv_getlength = iscsi_getlength, |
| 1476 |
.bdrv_get_info = iscsi_get_info, |
| 1477 |
.bdrv_truncate = iscsi_truncate, |
| 1478 |
.bdrv_refresh_limits = iscsi_refresh_limits, |
| 1479 |
|
| 1480 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
| 1481 |
.bdrv_co_get_block_status = iscsi_co_get_block_status, |
| 1482 |
#endif
|
| 1483 |
.bdrv_co_discard = iscsi_co_discard, |
| 1484 |
#if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED)
|
| 1485 |
.bdrv_co_write_zeroes = iscsi_co_write_zeroes, |
| 1486 |
#endif
|
| 1487 |
.bdrv_co_readv = iscsi_co_readv, |
| 1488 |
.bdrv_co_writev = iscsi_co_writev, |
| 1489 |
.bdrv_co_flush_to_disk = iscsi_co_flush, |
| 1490 |
|
| 1491 |
#ifdef __linux__
|
| 1492 |
.bdrv_ioctl = iscsi_ioctl, |
| 1493 |
.bdrv_aio_ioctl = iscsi_aio_ioctl, |
| 1494 |
#endif
|
| 1495 |
}; |
| 1496 |
|
| 1497 |
static QemuOptsList qemu_iscsi_opts = {
|
| 1498 |
.name = "iscsi",
|
| 1499 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), |
| 1500 |
.desc = {
|
| 1501 |
{
|
| 1502 |
.name = "user",
|
| 1503 |
.type = QEMU_OPT_STRING, |
| 1504 |
.help = "username for CHAP authentication to target",
|
| 1505 |
},{
|
| 1506 |
.name = "password",
|
| 1507 |
.type = QEMU_OPT_STRING, |
| 1508 |
.help = "password for CHAP authentication to target",
|
| 1509 |
},{
|
| 1510 |
.name = "header-digest",
|
| 1511 |
.type = QEMU_OPT_STRING, |
| 1512 |
.help = "HeaderDigest setting. "
|
| 1513 |
"{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
|
| 1514 |
},{
|
| 1515 |
.name = "initiator-name",
|
| 1516 |
.type = QEMU_OPT_STRING, |
| 1517 |
.help = "Initiator iqn name to use when connecting",
|
| 1518 |
}, |
| 1519 |
{ /* end of list */ }
|
| 1520 |
}, |
| 1521 |
}; |
| 1522 |
|
| 1523 |
static void iscsi_block_init(void) |
| 1524 |
{
|
| 1525 |
bdrv_register(&bdrv_iscsi); |
| 1526 |
qemu_add_opts(&qemu_iscsi_opts); |
| 1527 |
} |
| 1528 |
|
| 1529 |
block_init(iscsi_block_init); |