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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" |
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#include <poll.h> |
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#include <arpa/inet.h> |
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#include "qemu-common.h" |
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#include "qemu/config-file.h" |
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#include "qemu/error-report.h" |
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#include "block/block_int.h" |
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#include "trace.h" |
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#include "block/scsi.h" |
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#include "qemu/iov.h" |
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#include "sysemu/sysemu.h" |
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#include "qmp-commands.h" |
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|
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#include <iscsi/iscsi.h> |
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#include <iscsi/scsi-lowlevel.h> |
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#ifdef __linux__
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#include <scsi/sg.h> |
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#include <block/scsi.h> |
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#endif
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typedef struct IscsiLun { |
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struct iscsi_context *iscsi;
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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; |
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int events;
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QEMUTimer *nop_timer; |
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uint8_t lbpme; |
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uint8_t lbprz; |
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uint8_t has_write_same; |
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struct scsi_inquiry_logical_block_provisioning lbp;
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struct scsi_inquiry_block_limits bl;
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unsigned char *zeroblock; |
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} IscsiLun; |
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|
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typedef struct IscsiTask { |
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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; |
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} IscsiTask; |
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|
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typedef struct IscsiAIOCB { |
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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; |
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int status;
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int canceled;
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int retries;
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int64_t sector_num; |
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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 |
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#define MAX_NOP_FAILURES 3 |
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#define ISCSI_CMD_RETRIES 5 |
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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; |
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qemu_bh_delete(acb->bh); |
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g_free(acb->buf); |
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acb->buf = NULL;
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if (acb->canceled == 0) { |
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acb->common.cb(acb->common.opaque, acb->status); |
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} |
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|
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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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qemu_aio_release(acb); |
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} |
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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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} |
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|
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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) |
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{ |
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struct IscsiTask *iTask = opaque;
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struct scsi_task *task = command_data;
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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; |
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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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iTask->do_retry = 1;
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goto out;
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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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out:
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if (iTask->co) {
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qemu_coroutine_enter(iTask->co, NULL);
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} |
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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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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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acb->status = -ECANCELED; |
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iscsi_schedule_bh(acb); |
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} |
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static void |
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iscsi_aio_cancel(BlockDriverAIOCB *blockacb) |
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{ |
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IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; |
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IscsiLun *iscsilun = acb->iscsilun; |
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if (acb->status != -EINPROGRESS) {
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return;
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} |
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acb->canceled = 1;
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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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while (acb->status == -EINPROGRESS) {
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qemu_aio_wait(); |
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} |
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} |
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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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static void iscsi_process_read(void *arg); |
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static void iscsi_process_write(void *arg); |
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static void |
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iscsi_set_events(IscsiLun *iscsilun) |
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{ |
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struct iscsi_context *iscsi = iscsilun->iscsi;
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int ev;
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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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iscsilun->events = ev; |
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} |
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static void |
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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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iscsi_service(iscsi, POLLIN); |
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iscsi_set_events(iscsilun); |
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} |
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static void |
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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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iscsi_service(iscsi, POLLOUT); |
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iscsi_set_events(iscsilun); |
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} |
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static int |
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iscsi_aio_writev_acb(IscsiAIOCB *acb); |
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static void |
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iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status, |
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void *command_data, void *opaque) |
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{ |
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IscsiAIOCB *acb = opaque; |
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trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled); |
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g_free(acb->buf); |
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acb->buf = NULL;
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if (acb->canceled != 0) { |
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return;
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} |
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acb->status = 0;
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if (status != 0) { |
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if (status == SCSI_STATUS_CHECK_CONDITION
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&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
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&& acb->retries-- > 0) {
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scsi_free_scsi_task(acb->task); |
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acb->task = NULL;
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if (iscsi_aio_writev_acb(acb) == 0) { |
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iscsi_set_events(acb->iscsilun); |
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return;
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} |
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} |
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error_report("Failed to write16 data to iSCSI lun. %s",
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iscsi_get_error(iscsi)); |
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acb->status = -EIO; |
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} |
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iscsi_schedule_bh(acb); |
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} |
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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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} |
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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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} |
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static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
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IscsiLun *iscsilun) |
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{ |
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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); |
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return 0; |
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} |
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return 1; |
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} |
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|
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static int |
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iscsi_aio_writev_acb(IscsiAIOCB *acb) |
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{ |
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struct iscsi_context *iscsi = acb->iscsilun->iscsi;
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size_t size; |
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uint32_t num_sectors; |
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uint64_t lba; |
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#if !defined(LIBISCSI_FEATURE_IOVECTOR)
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struct iscsi_data data;
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#endif
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int ret;
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acb->canceled = 0;
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acb->bh = NULL;
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acb->status = -EINPROGRESS; |
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acb->buf = NULL;
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/* this will allow us to get rid of 'buf' completely */
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size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
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#if !defined(LIBISCSI_FEATURE_IOVECTOR)
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data.size = MIN(size, acb->qiov->size); |
326 |
|
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/* if the iovec only contains one buffer we can pass it directly */
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if (acb->qiov->niov == 1) { |
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data.data = acb->qiov->iov[0].iov_base;
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} else {
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acb->buf = g_malloc(data.size); |
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qemu_iovec_to_buf(acb->qiov, 0, acb->buf, data.size);
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data.data = acb->buf; |
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} |
335 |
#endif
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|
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acb->task = malloc(sizeof(struct scsi_task)); |
338 |
if (acb->task == NULL) { |
339 |
error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
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"command. %s", iscsi_get_error(iscsi));
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return -1; |
342 |
} |
343 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
344 |
|
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acb->task->xfer_dir = SCSI_XFER_WRITE; |
346 |
acb->task->cdb_size = 16;
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acb->task->cdb[0] = 0x8a; |
348 |
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
349 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
350 |
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); |
351 |
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
352 |
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
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acb->task->expxferlen = size; |
354 |
|
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#if defined(LIBISCSI_FEATURE_IOVECTOR)
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ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
357 |
iscsi_aio_write16_cb, |
358 |
NULL,
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359 |
acb); |
360 |
#else
|
361 |
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
362 |
iscsi_aio_write16_cb, |
363 |
&data, |
364 |
acb); |
365 |
#endif
|
366 |
if (ret != 0) { |
367 |
scsi_free_scsi_task(acb->task); |
368 |
g_free(acb->buf); |
369 |
return -1; |
370 |
} |
371 |
|
372 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
373 |
scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
374 |
#endif
|
375 |
|
376 |
return 0; |
377 |
} |
378 |
|
379 |
static BlockDriverAIOCB *
|
380 |
iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num, |
381 |
QEMUIOVector *qiov, int nb_sectors,
|
382 |
BlockDriverCompletionFunc *cb, |
383 |
void *opaque)
|
384 |
{ |
385 |
IscsiLun *iscsilun = bs->opaque; |
386 |
IscsiAIOCB *acb; |
387 |
|
388 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
389 |
return NULL; |
390 |
} |
391 |
|
392 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
393 |
trace_iscsi_aio_writev(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); |
394 |
|
395 |
acb->iscsilun = iscsilun; |
396 |
acb->qiov = qiov; |
397 |
acb->nb_sectors = nb_sectors; |
398 |
acb->sector_num = sector_num; |
399 |
acb->retries = ISCSI_CMD_RETRIES; |
400 |
|
401 |
if (iscsi_aio_writev_acb(acb) != 0) { |
402 |
qemu_aio_release(acb); |
403 |
return NULL; |
404 |
} |
405 |
|
406 |
iscsi_set_events(iscsilun); |
407 |
return &acb->common;
|
408 |
} |
409 |
|
410 |
static int |
411 |
iscsi_aio_readv_acb(IscsiAIOCB *acb); |
412 |
|
413 |
static void |
414 |
iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status, |
415 |
void *command_data, void *opaque) |
416 |
{ |
417 |
IscsiAIOCB *acb = opaque; |
418 |
|
419 |
trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled); |
420 |
|
421 |
if (acb->canceled != 0) { |
422 |
return;
|
423 |
} |
424 |
|
425 |
acb->status = 0;
|
426 |
if (status != 0) { |
427 |
if (status == SCSI_STATUS_CHECK_CONDITION
|
428 |
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
429 |
&& acb->retries-- > 0) {
|
430 |
scsi_free_scsi_task(acb->task); |
431 |
acb->task = NULL;
|
432 |
if (iscsi_aio_readv_acb(acb) == 0) { |
433 |
iscsi_set_events(acb->iscsilun); |
434 |
return;
|
435 |
} |
436 |
} |
437 |
error_report("Failed to read16 data from iSCSI lun. %s",
|
438 |
iscsi_get_error(iscsi)); |
439 |
acb->status = -EIO; |
440 |
} |
441 |
|
442 |
iscsi_schedule_bh(acb); |
443 |
} |
444 |
|
445 |
static int |
446 |
iscsi_aio_readv_acb(IscsiAIOCB *acb) |
447 |
{ |
448 |
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
449 |
size_t size; |
450 |
uint64_t lba; |
451 |
uint32_t num_sectors; |
452 |
int ret;
|
453 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
454 |
int i;
|
455 |
#endif
|
456 |
|
457 |
acb->canceled = 0;
|
458 |
acb->bh = NULL;
|
459 |
acb->status = -EINPROGRESS; |
460 |
acb->buf = NULL;
|
461 |
|
462 |
size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
463 |
|
464 |
acb->task = malloc(sizeof(struct scsi_task)); |
465 |
if (acb->task == NULL) { |
466 |
error_report("iSCSI: Failed to allocate task for scsi READ16 "
|
467 |
"command. %s", iscsi_get_error(iscsi));
|
468 |
return -1; |
469 |
} |
470 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
471 |
|
472 |
acb->task->xfer_dir = SCSI_XFER_READ; |
473 |
acb->task->expxferlen = size; |
474 |
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
475 |
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
476 |
|
477 |
switch (acb->iscsilun->type) {
|
478 |
case TYPE_DISK:
|
479 |
acb->task->cdb_size = 16;
|
480 |
acb->task->cdb[0] = 0x88; |
481 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
482 |
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); |
483 |
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
|
484 |
break;
|
485 |
default:
|
486 |
acb->task->cdb_size = 10;
|
487 |
acb->task->cdb[0] = 0x28; |
488 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba);
|
489 |
*(uint16_t *)&acb->task->cdb[7] = htons(num_sectors);
|
490 |
break;
|
491 |
} |
492 |
|
493 |
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
494 |
iscsi_aio_read16_cb, |
495 |
NULL,
|
496 |
acb); |
497 |
if (ret != 0) { |
498 |
scsi_free_scsi_task(acb->task); |
499 |
return -1; |
500 |
} |
501 |
|
502 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
503 |
scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
504 |
#else
|
505 |
for (i = 0; i < acb->qiov->niov; i++) { |
506 |
scsi_task_add_data_in_buffer(acb->task, |
507 |
acb->qiov->iov[i].iov_len, |
508 |
acb->qiov->iov[i].iov_base); |
509 |
} |
510 |
#endif
|
511 |
return 0; |
512 |
} |
513 |
|
514 |
static BlockDriverAIOCB *
|
515 |
iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, |
516 |
QEMUIOVector *qiov, int nb_sectors,
|
517 |
BlockDriverCompletionFunc *cb, |
518 |
void *opaque)
|
519 |
{ |
520 |
IscsiLun *iscsilun = bs->opaque; |
521 |
IscsiAIOCB *acb; |
522 |
|
523 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
524 |
return NULL; |
525 |
} |
526 |
|
527 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
528 |
trace_iscsi_aio_readv(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); |
529 |
|
530 |
acb->nb_sectors = nb_sectors; |
531 |
acb->sector_num = sector_num; |
532 |
acb->iscsilun = iscsilun; |
533 |
acb->qiov = qiov; |
534 |
acb->retries = ISCSI_CMD_RETRIES; |
535 |
|
536 |
if (iscsi_aio_readv_acb(acb) != 0) { |
537 |
qemu_aio_release(acb); |
538 |
return NULL; |
539 |
} |
540 |
|
541 |
iscsi_set_events(iscsilun); |
542 |
return &acb->common;
|
543 |
} |
544 |
|
545 |
static int |
546 |
iscsi_aio_flush_acb(IscsiAIOCB *acb); |
547 |
|
548 |
static void |
549 |
iscsi_synccache10_cb(struct iscsi_context *iscsi, int status, |
550 |
void *command_data, void *opaque) |
551 |
{ |
552 |
IscsiAIOCB *acb = opaque; |
553 |
|
554 |
if (acb->canceled != 0) { |
555 |
return;
|
556 |
} |
557 |
|
558 |
acb->status = 0;
|
559 |
if (status != 0) { |
560 |
if (status == SCSI_STATUS_CHECK_CONDITION
|
561 |
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
562 |
&& acb->retries-- > 0) {
|
563 |
scsi_free_scsi_task(acb->task); |
564 |
acb->task = NULL;
|
565 |
if (iscsi_aio_flush_acb(acb) == 0) { |
566 |
iscsi_set_events(acb->iscsilun); |
567 |
return;
|
568 |
} |
569 |
} |
570 |
error_report("Failed to sync10 data on iSCSI lun. %s",
|
571 |
iscsi_get_error(iscsi)); |
572 |
acb->status = -EIO; |
573 |
} |
574 |
|
575 |
iscsi_schedule_bh(acb); |
576 |
} |
577 |
|
578 |
static int |
579 |
iscsi_aio_flush_acb(IscsiAIOCB *acb) |
580 |
{ |
581 |
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
582 |
|
583 |
acb->canceled = 0;
|
584 |
acb->bh = NULL;
|
585 |
acb->status = -EINPROGRESS; |
586 |
acb->buf = NULL;
|
587 |
|
588 |
acb->task = iscsi_synchronizecache10_task(iscsi, acb->iscsilun->lun, |
589 |
0, 0, 0, 0, |
590 |
iscsi_synccache10_cb, |
591 |
acb); |
592 |
if (acb->task == NULL) { |
593 |
error_report("iSCSI: Failed to send synchronizecache10 command. %s",
|
594 |
iscsi_get_error(iscsi)); |
595 |
return -1; |
596 |
} |
597 |
|
598 |
return 0; |
599 |
} |
600 |
|
601 |
static BlockDriverAIOCB *
|
602 |
iscsi_aio_flush(BlockDriverState *bs, |
603 |
BlockDriverCompletionFunc *cb, void *opaque)
|
604 |
{ |
605 |
IscsiLun *iscsilun = bs->opaque; |
606 |
|
607 |
IscsiAIOCB *acb; |
608 |
|
609 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
610 |
|
611 |
acb->iscsilun = iscsilun; |
612 |
acb->retries = ISCSI_CMD_RETRIES; |
613 |
|
614 |
if (iscsi_aio_flush_acb(acb) != 0) { |
615 |
qemu_aio_release(acb); |
616 |
return NULL; |
617 |
} |
618 |
|
619 |
iscsi_set_events(iscsilun); |
620 |
|
621 |
return &acb->common;
|
622 |
} |
623 |
|
624 |
#ifdef __linux__
|
625 |
static void |
626 |
iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, |
627 |
void *command_data, void *opaque) |
628 |
{ |
629 |
IscsiAIOCB *acb = opaque; |
630 |
|
631 |
g_free(acb->buf); |
632 |
acb->buf = NULL;
|
633 |
|
634 |
if (acb->canceled != 0) { |
635 |
return;
|
636 |
} |
637 |
|
638 |
acb->status = 0;
|
639 |
if (status < 0) { |
640 |
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
|
641 |
iscsi_get_error(iscsi)); |
642 |
acb->status = -EIO; |
643 |
} |
644 |
|
645 |
acb->ioh->driver_status = 0;
|
646 |
acb->ioh->host_status = 0;
|
647 |
acb->ioh->resid = 0;
|
648 |
|
649 |
#define SG_ERR_DRIVER_SENSE 0x08 |
650 |
|
651 |
if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { |
652 |
int ss;
|
653 |
|
654 |
acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; |
655 |
|
656 |
acb->ioh->sb_len_wr = acb->task->datain.size - 2;
|
657 |
ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? |
658 |
acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; |
659 |
memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
|
660 |
} |
661 |
|
662 |
iscsi_schedule_bh(acb); |
663 |
} |
664 |
|
665 |
static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
|
666 |
unsigned long int req, void *buf, |
667 |
BlockDriverCompletionFunc *cb, void *opaque)
|
668 |
{ |
669 |
IscsiLun *iscsilun = bs->opaque; |
670 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
671 |
struct iscsi_data data;
|
672 |
IscsiAIOCB *acb; |
673 |
|
674 |
assert(req == SG_IO); |
675 |
|
676 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
677 |
|
678 |
acb->iscsilun = iscsilun; |
679 |
acb->canceled = 0;
|
680 |
acb->bh = NULL;
|
681 |
acb->status = -EINPROGRESS; |
682 |
acb->buf = NULL;
|
683 |
acb->ioh = buf; |
684 |
|
685 |
acb->task = malloc(sizeof(struct scsi_task)); |
686 |
if (acb->task == NULL) { |
687 |
error_report("iSCSI: Failed to allocate task for scsi command. %s",
|
688 |
iscsi_get_error(iscsi)); |
689 |
qemu_aio_release(acb); |
690 |
return NULL; |
691 |
} |
692 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
693 |
|
694 |
switch (acb->ioh->dxfer_direction) {
|
695 |
case SG_DXFER_TO_DEV:
|
696 |
acb->task->xfer_dir = SCSI_XFER_WRITE; |
697 |
break;
|
698 |
case SG_DXFER_FROM_DEV:
|
699 |
acb->task->xfer_dir = SCSI_XFER_READ; |
700 |
break;
|
701 |
default:
|
702 |
acb->task->xfer_dir = SCSI_XFER_NONE; |
703 |
break;
|
704 |
} |
705 |
|
706 |
acb->task->cdb_size = acb->ioh->cmd_len; |
707 |
memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
|
708 |
acb->task->expxferlen = acb->ioh->dxfer_len; |
709 |
|
710 |
data.size = 0;
|
711 |
if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
|
712 |
if (acb->ioh->iovec_count == 0) { |
713 |
data.data = acb->ioh->dxferp; |
714 |
data.size = acb->ioh->dxfer_len; |
715 |
} else {
|
716 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
717 |
scsi_task_set_iov_out(acb->task, |
718 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
719 |
acb->ioh->iovec_count); |
720 |
#else
|
721 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
722 |
|
723 |
acb->buf = g_malloc(acb->ioh->dxfer_len); |
724 |
data.data = acb->buf; |
725 |
data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0,
|
726 |
acb->buf, acb->ioh->dxfer_len); |
727 |
#endif
|
728 |
} |
729 |
} |
730 |
|
731 |
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
|
732 |
iscsi_aio_ioctl_cb, |
733 |
(data.size > 0) ? &data : NULL, |
734 |
acb) != 0) {
|
735 |
scsi_free_scsi_task(acb->task); |
736 |
qemu_aio_release(acb); |
737 |
return NULL; |
738 |
} |
739 |
|
740 |
/* tell libiscsi to read straight into the buffer we got from ioctl */
|
741 |
if (acb->task->xfer_dir == SCSI_XFER_READ) {
|
742 |
if (acb->ioh->iovec_count == 0) { |
743 |
scsi_task_add_data_in_buffer(acb->task, |
744 |
acb->ioh->dxfer_len, |
745 |
acb->ioh->dxferp); |
746 |
} else {
|
747 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
748 |
scsi_task_set_iov_in(acb->task, |
749 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
750 |
acb->ioh->iovec_count); |
751 |
#else
|
752 |
int i;
|
753 |
for (i = 0; i < acb->ioh->iovec_count; i++) { |
754 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
755 |
|
756 |
scsi_task_add_data_in_buffer(acb->task, |
757 |
iov[i].iov_len, |
758 |
iov[i].iov_base); |
759 |
} |
760 |
#endif
|
761 |
} |
762 |
} |
763 |
|
764 |
iscsi_set_events(iscsilun); |
765 |
|
766 |
return &acb->common;
|
767 |
} |
768 |
|
769 |
|
770 |
static void ioctl_cb(void *opaque, int status) |
771 |
{ |
772 |
int *p_status = opaque;
|
773 |
*p_status = status; |
774 |
} |
775 |
|
776 |
static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
777 |
{ |
778 |
IscsiLun *iscsilun = bs->opaque; |
779 |
int status;
|
780 |
|
781 |
switch (req) {
|
782 |
case SG_GET_VERSION_NUM:
|
783 |
*(int *)buf = 30000; |
784 |
break;
|
785 |
case SG_GET_SCSI_ID:
|
786 |
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
|
787 |
break;
|
788 |
case SG_IO:
|
789 |
status = -EINPROGRESS; |
790 |
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); |
791 |
|
792 |
while (status == -EINPROGRESS) {
|
793 |
qemu_aio_wait(); |
794 |
} |
795 |
|
796 |
return 0; |
797 |
default:
|
798 |
return -1; |
799 |
} |
800 |
return 0; |
801 |
} |
802 |
#endif
|
803 |
|
804 |
static int64_t
|
805 |
iscsi_getlength(BlockDriverState *bs) |
806 |
{ |
807 |
IscsiLun *iscsilun = bs->opaque; |
808 |
int64_t len; |
809 |
|
810 |
len = iscsilun->num_blocks; |
811 |
len *= iscsilun->block_size; |
812 |
|
813 |
return len;
|
814 |
} |
815 |
|
816 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
817 |
|
818 |
static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs,
|
819 |
int64_t sector_num, |
820 |
int nb_sectors, int *pnum) |
821 |
{ |
822 |
IscsiLun *iscsilun = bs->opaque; |
823 |
struct scsi_get_lba_status *lbas = NULL; |
824 |
struct scsi_lba_status_descriptor *lbasd = NULL; |
825 |
struct IscsiTask iTask;
|
826 |
int64_t ret; |
827 |
|
828 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
829 |
|
830 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
831 |
ret = -EINVAL; |
832 |
goto out;
|
833 |
} |
834 |
|
835 |
/* default to all sectors allocated */
|
836 |
ret = BDRV_BLOCK_DATA; |
837 |
ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; |
838 |
*pnum = nb_sectors; |
839 |
|
840 |
/* LUN does not support logical block provisioning */
|
841 |
if (iscsilun->lbpme == 0) { |
842 |
goto out;
|
843 |
} |
844 |
|
845 |
retry:
|
846 |
if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun,
|
847 |
sector_qemu2lun(sector_num, iscsilun), |
848 |
8 + 16, iscsi_co_generic_cb, |
849 |
&iTask) == NULL) {
|
850 |
ret = -EIO; |
851 |
goto out;
|
852 |
} |
853 |
|
854 |
while (!iTask.complete) {
|
855 |
iscsi_set_events(iscsilun); |
856 |
qemu_coroutine_yield(); |
857 |
} |
858 |
|
859 |
if (iTask.do_retry) {
|
860 |
if (iTask.task != NULL) { |
861 |
scsi_free_scsi_task(iTask.task); |
862 |
iTask.task = NULL;
|
863 |
} |
864 |
goto retry;
|
865 |
} |
866 |
|
867 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
868 |
/* in case the get_lba_status_callout fails (i.e.
|
869 |
* because the device is busy or the cmd is not
|
870 |
* supported) we pretend all blocks are allocated
|
871 |
* for backwards compatibility */
|
872 |
goto out;
|
873 |
} |
874 |
|
875 |
lbas = scsi_datain_unmarshall(iTask.task); |
876 |
if (lbas == NULL) { |
877 |
ret = -EIO; |
878 |
goto out;
|
879 |
} |
880 |
|
881 |
lbasd = &lbas->descriptors[0];
|
882 |
|
883 |
if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) {
|
884 |
ret = -EIO; |
885 |
goto out;
|
886 |
} |
887 |
|
888 |
*pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); |
889 |
if (*pnum > nb_sectors) {
|
890 |
*pnum = nb_sectors; |
891 |
} |
892 |
|
893 |
if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED ||
|
894 |
lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { |
895 |
ret &= ~BDRV_BLOCK_DATA; |
896 |
if (iscsilun->lbprz) {
|
897 |
ret |= BDRV_BLOCK_ZERO; |
898 |
} |
899 |
} |
900 |
|
901 |
out:
|
902 |
if (iTask.task != NULL) { |
903 |
scsi_free_scsi_task(iTask.task); |
904 |
} |
905 |
return ret;
|
906 |
} |
907 |
|
908 |
#endif /* LIBISCSI_FEATURE_IOVECTOR */ |
909 |
|
910 |
static int |
911 |
coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, |
912 |
int nb_sectors)
|
913 |
{ |
914 |
IscsiLun *iscsilun = bs->opaque; |
915 |
struct IscsiTask iTask;
|
916 |
struct unmap_list list;
|
917 |
|
918 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
919 |
return -EINVAL;
|
920 |
} |
921 |
|
922 |
if (!iscsilun->lbp.lbpu) {
|
923 |
/* UNMAP is not supported by the target */
|
924 |
return 0; |
925 |
} |
926 |
|
927 |
list.lba = sector_qemu2lun(sector_num, iscsilun); |
928 |
list.num = sector_qemu2lun(nb_sectors, iscsilun); |
929 |
|
930 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
931 |
retry:
|
932 |
if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
933 |
iscsi_co_generic_cb, &iTask) == NULL) {
|
934 |
return -EIO;
|
935 |
} |
936 |
|
937 |
while (!iTask.complete) {
|
938 |
iscsi_set_events(iscsilun); |
939 |
qemu_coroutine_yield(); |
940 |
} |
941 |
|
942 |
if (iTask.task != NULL) { |
943 |
scsi_free_scsi_task(iTask.task); |
944 |
iTask.task = NULL;
|
945 |
} |
946 |
|
947 |
if (iTask.do_retry) {
|
948 |
goto retry;
|
949 |
} |
950 |
|
951 |
if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
|
952 |
/* the target might fail with a check condition if it
|
953 |
is not happy with the alignment of the UNMAP request
|
954 |
we silently fail in this case */
|
955 |
return 0; |
956 |
} |
957 |
|
958 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
959 |
return -EIO;
|
960 |
} |
961 |
|
962 |
return 0; |
963 |
} |
964 |
|
965 |
#if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED)
|
966 |
|
967 |
static int |
968 |
coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, |
969 |
int nb_sectors, BdrvRequestFlags flags)
|
970 |
{ |
971 |
IscsiLun *iscsilun = bs->opaque; |
972 |
struct IscsiTask iTask;
|
973 |
uint64_t lba; |
974 |
uint32_t nb_blocks; |
975 |
|
976 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
977 |
return -EINVAL;
|
978 |
} |
979 |
|
980 |
if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
|
981 |
/* WRITE SAME without UNMAP is not supported by the target */
|
982 |
return -ENOTSUP;
|
983 |
} |
984 |
|
985 |
if ((flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->lbp.lbpws) {
|
986 |
/* WRITE SAME with UNMAP is not supported by the target */
|
987 |
return -ENOTSUP;
|
988 |
} |
989 |
|
990 |
lba = sector_qemu2lun(sector_num, iscsilun); |
991 |
nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); |
992 |
|
993 |
if (iscsilun->zeroblock == NULL) { |
994 |
iscsilun->zeroblock = g_malloc0(iscsilun->block_size); |
995 |
} |
996 |
|
997 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
998 |
retry:
|
999 |
if (iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
|
1000 |
iscsilun->zeroblock, iscsilun->block_size, |
1001 |
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
|
1002 |
0, 0, iscsi_co_generic_cb, &iTask) == NULL) { |
1003 |
return -EIO;
|
1004 |
} |
1005 |
|
1006 |
while (!iTask.complete) {
|
1007 |
iscsi_set_events(iscsilun); |
1008 |
qemu_coroutine_yield(); |
1009 |
} |
1010 |
|
1011 |
if (iTask.task != NULL) { |
1012 |
scsi_free_scsi_task(iTask.task); |
1013 |
iTask.task = NULL;
|
1014 |
} |
1015 |
|
1016 |
if (iTask.do_retry) {
|
1017 |
goto retry;
|
1018 |
} |
1019 |
|
1020 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
1021 |
if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
|
1022 |
iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && |
1023 |
iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) { |
1024 |
/* WRITE SAME is not supported by the target */
|
1025 |
iscsilun->has_write_same = false;
|
1026 |
return -ENOTSUP;
|
1027 |
} |
1028 |
|
1029 |
return -EIO;
|
1030 |
} |
1031 |
|
1032 |
return 0; |
1033 |
} |
1034 |
|
1035 |
#endif /* SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED */ |
1036 |
|
1037 |
static int parse_chap(struct iscsi_context *iscsi, const char *target) |
1038 |
{ |
1039 |
QemuOptsList *list; |
1040 |
QemuOpts *opts; |
1041 |
const char *user = NULL; |
1042 |
const char *password = NULL; |
1043 |
|
1044 |
list = qemu_find_opts("iscsi");
|
1045 |
if (!list) {
|
1046 |
return 0; |
1047 |
} |
1048 |
|
1049 |
opts = qemu_opts_find(list, target); |
1050 |
if (opts == NULL) { |
1051 |
opts = QTAILQ_FIRST(&list->head); |
1052 |
if (!opts) {
|
1053 |
return 0; |
1054 |
} |
1055 |
} |
1056 |
|
1057 |
user = qemu_opt_get(opts, "user");
|
1058 |
if (!user) {
|
1059 |
return 0; |
1060 |
} |
1061 |
|
1062 |
password = qemu_opt_get(opts, "password");
|
1063 |
if (!password) {
|
1064 |
error_report("CHAP username specified but no password was given");
|
1065 |
return -1; |
1066 |
} |
1067 |
|
1068 |
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
1069 |
error_report("Failed to set initiator username and password");
|
1070 |
return -1; |
1071 |
} |
1072 |
|
1073 |
return 0; |
1074 |
} |
1075 |
|
1076 |
static void parse_header_digest(struct iscsi_context *iscsi, const char *target) |
1077 |
{ |
1078 |
QemuOptsList *list; |
1079 |
QemuOpts *opts; |
1080 |
const char *digest = NULL; |
1081 |
|
1082 |
list = qemu_find_opts("iscsi");
|
1083 |
if (!list) {
|
1084 |
return;
|
1085 |
} |
1086 |
|
1087 |
opts = qemu_opts_find(list, target); |
1088 |
if (opts == NULL) { |
1089 |
opts = QTAILQ_FIRST(&list->head); |
1090 |
if (!opts) {
|
1091 |
return;
|
1092 |
} |
1093 |
} |
1094 |
|
1095 |
digest = qemu_opt_get(opts, "header-digest");
|
1096 |
if (!digest) {
|
1097 |
return;
|
1098 |
} |
1099 |
|
1100 |
if (!strcmp(digest, "CRC32C")) { |
1101 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); |
1102 |
} else if (!strcmp(digest, "NONE")) { |
1103 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); |
1104 |
} else if (!strcmp(digest, "CRC32C-NONE")) { |
1105 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); |
1106 |
} else if (!strcmp(digest, "NONE-CRC32C")) { |
1107 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
1108 |
} else {
|
1109 |
error_report("Invalid header-digest setting : %s", digest);
|
1110 |
} |
1111 |
} |
1112 |
|
1113 |
static char *parse_initiator_name(const char *target) |
1114 |
{ |
1115 |
QemuOptsList *list; |
1116 |
QemuOpts *opts; |
1117 |
const char *name; |
1118 |
char *iscsi_name;
|
1119 |
UuidInfo *uuid_info; |
1120 |
|
1121 |
list = qemu_find_opts("iscsi");
|
1122 |
if (list) {
|
1123 |
opts = qemu_opts_find(list, target); |
1124 |
if (!opts) {
|
1125 |
opts = QTAILQ_FIRST(&list->head); |
1126 |
} |
1127 |
if (opts) {
|
1128 |
name = qemu_opt_get(opts, "initiator-name");
|
1129 |
if (name) {
|
1130 |
return g_strdup(name);
|
1131 |
} |
1132 |
} |
1133 |
} |
1134 |
|
1135 |
uuid_info = qmp_query_uuid(NULL);
|
1136 |
if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { |
1137 |
name = qemu_get_vm_name(); |
1138 |
} else {
|
1139 |
name = uuid_info->UUID; |
1140 |
} |
1141 |
iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
|
1142 |
name ? ":" : "", name ? name : ""); |
1143 |
qapi_free_UuidInfo(uuid_info); |
1144 |
return iscsi_name;
|
1145 |
} |
1146 |
|
1147 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
1148 |
static void iscsi_nop_timed_event(void *opaque) |
1149 |
{ |
1150 |
IscsiLun *iscsilun = opaque; |
1151 |
|
1152 |
if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) {
|
1153 |
error_report("iSCSI: NOP timeout. Reconnecting...");
|
1154 |
iscsi_reconnect(iscsilun->iscsi); |
1155 |
} |
1156 |
|
1157 |
if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { |
1158 |
error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
|
1159 |
return;
|
1160 |
} |
1161 |
|
1162 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
1163 |
iscsi_set_events(iscsilun); |
1164 |
} |
1165 |
#endif
|
1166 |
|
1167 |
static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
1168 |
{ |
1169 |
struct scsi_task *task = NULL; |
1170 |
struct scsi_readcapacity10 *rc10 = NULL; |
1171 |
struct scsi_readcapacity16 *rc16 = NULL; |
1172 |
int ret = 0; |
1173 |
int retries = ISCSI_CMD_RETRIES;
|
1174 |
|
1175 |
do {
|
1176 |
if (task != NULL) { |
1177 |
scsi_free_scsi_task(task); |
1178 |
task = NULL;
|
1179 |
} |
1180 |
|
1181 |
switch (iscsilun->type) {
|
1182 |
case TYPE_DISK:
|
1183 |
task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); |
1184 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
1185 |
rc16 = scsi_datain_unmarshall(task); |
1186 |
if (rc16 == NULL) { |
1187 |
error_report("iSCSI: Failed to unmarshall readcapacity16 data.");
|
1188 |
ret = -EINVAL; |
1189 |
} else {
|
1190 |
iscsilun->block_size = rc16->block_length; |
1191 |
iscsilun->num_blocks = rc16->returned_lba + 1;
|
1192 |
iscsilun->lbpme = rc16->lbpme; |
1193 |
iscsilun->lbprz = rc16->lbprz; |
1194 |
} |
1195 |
} |
1196 |
break;
|
1197 |
case TYPE_ROM:
|
1198 |
task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); |
1199 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
1200 |
rc10 = scsi_datain_unmarshall(task); |
1201 |
if (rc10 == NULL) { |
1202 |
error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
|
1203 |
ret = -EINVAL; |
1204 |
} else {
|
1205 |
iscsilun->block_size = rc10->block_size; |
1206 |
if (rc10->lba == 0) { |
1207 |
/* blank disk loaded */
|
1208 |
iscsilun->num_blocks = 0;
|
1209 |
} else {
|
1210 |
iscsilun->num_blocks = rc10->lba + 1;
|
1211 |
} |
1212 |
} |
1213 |
} |
1214 |
break;
|
1215 |
default:
|
1216 |
return 0; |
1217 |
} |
1218 |
} while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1219 |
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
1220 |
&& retries-- > 0);
|
1221 |
|
1222 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1223 |
error_report("iSCSI: failed to send readcapacity10 command.");
|
1224 |
ret = -EINVAL; |
1225 |
} |
1226 |
if (task) {
|
1227 |
scsi_free_scsi_task(task); |
1228 |
} |
1229 |
return ret;
|
1230 |
} |
1231 |
|
1232 |
/* TODO Convert to fine grained options */
|
1233 |
static QemuOptsList runtime_opts = {
|
1234 |
.name = "iscsi",
|
1235 |
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), |
1236 |
.desc = { |
1237 |
{ |
1238 |
.name = "filename",
|
1239 |
.type = QEMU_OPT_STRING, |
1240 |
.help = "URL to the iscsi image",
|
1241 |
}, |
1242 |
{ /* end of list */ }
|
1243 |
}, |
1244 |
}; |
1245 |
|
1246 |
static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, |
1247 |
int lun, int evpd, int pc) { |
1248 |
int full_size;
|
1249 |
struct scsi_task *task = NULL; |
1250 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
|
1251 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1252 |
goto fail;
|
1253 |
} |
1254 |
full_size = scsi_datain_getfullsize(task); |
1255 |
if (full_size > task->datain.size) {
|
1256 |
scsi_free_scsi_task(task); |
1257 |
|
1258 |
/* we need more data for the full list */
|
1259 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); |
1260 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1261 |
goto fail;
|
1262 |
} |
1263 |
} |
1264 |
|
1265 |
return task;
|
1266 |
|
1267 |
fail:
|
1268 |
error_report("iSCSI: Inquiry command failed : %s",
|
1269 |
iscsi_get_error(iscsi)); |
1270 |
if (task) {
|
1271 |
scsi_free_scsi_task(task); |
1272 |
return NULL; |
1273 |
} |
1274 |
return NULL; |
1275 |
} |
1276 |
|
1277 |
/*
|
1278 |
* We support iscsi url's on the form
|
1279 |
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
1280 |
*/
|
1281 |
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1282 |
Error **errp) |
1283 |
{ |
1284 |
IscsiLun *iscsilun = bs->opaque; |
1285 |
struct iscsi_context *iscsi = NULL; |
1286 |
struct iscsi_url *iscsi_url = NULL; |
1287 |
struct scsi_task *task = NULL; |
1288 |
struct scsi_inquiry_standard *inq = NULL; |
1289 |
char *initiator_name = NULL; |
1290 |
QemuOpts *opts; |
1291 |
Error *local_err = NULL;
|
1292 |
const char *filename; |
1293 |
int ret;
|
1294 |
|
1295 |
if ((BDRV_SECTOR_SIZE % 512) != 0) { |
1296 |
error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. "
|
1297 |
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
|
1298 |
"of 512", BDRV_SECTOR_SIZE);
|
1299 |
return -EINVAL;
|
1300 |
} |
1301 |
|
1302 |
opts = qemu_opts_create_nofail(&runtime_opts); |
1303 |
qemu_opts_absorb_qdict(opts, options, &local_err); |
1304 |
if (error_is_set(&local_err)) {
|
1305 |
qerror_report_err(local_err); |
1306 |
error_free(local_err); |
1307 |
ret = -EINVAL; |
1308 |
goto out;
|
1309 |
} |
1310 |
|
1311 |
filename = qemu_opt_get(opts, "filename");
|
1312 |
|
1313 |
|
1314 |
iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1315 |
if (iscsi_url == NULL) { |
1316 |
error_report("Failed to parse URL : %s", filename);
|
1317 |
ret = -EINVAL; |
1318 |
goto out;
|
1319 |
} |
1320 |
|
1321 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1322 |
|
1323 |
initiator_name = parse_initiator_name(iscsi_url->target); |
1324 |
|
1325 |
iscsi = iscsi_create_context(initiator_name); |
1326 |
if (iscsi == NULL) { |
1327 |
error_report("iSCSI: Failed to create iSCSI context.");
|
1328 |
ret = -ENOMEM; |
1329 |
goto out;
|
1330 |
} |
1331 |
|
1332 |
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
1333 |
error_report("iSCSI: Failed to set target name.");
|
1334 |
ret = -EINVAL; |
1335 |
goto out;
|
1336 |
} |
1337 |
|
1338 |
if (iscsi_url->user != NULL) { |
1339 |
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, |
1340 |
iscsi_url->passwd); |
1341 |
if (ret != 0) { |
1342 |
error_report("Failed to set initiator username and password");
|
1343 |
ret = -EINVAL; |
1344 |
goto out;
|
1345 |
} |
1346 |
} |
1347 |
|
1348 |
/* check if we got CHAP username/password via the options */
|
1349 |
if (parse_chap(iscsi, iscsi_url->target) != 0) { |
1350 |
error_report("iSCSI: Failed to set CHAP user/password");
|
1351 |
ret = -EINVAL; |
1352 |
goto out;
|
1353 |
} |
1354 |
|
1355 |
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1356 |
error_report("iSCSI: Failed to set session type to normal.");
|
1357 |
ret = -EINVAL; |
1358 |
goto out;
|
1359 |
} |
1360 |
|
1361 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
1362 |
|
1363 |
/* check if we got HEADER_DIGEST via the options */
|
1364 |
parse_header_digest(iscsi, iscsi_url->target); |
1365 |
|
1366 |
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1367 |
error_report("iSCSI: Failed to connect to LUN : %s",
|
1368 |
iscsi_get_error(iscsi)); |
1369 |
ret = -EINVAL; |
1370 |
goto out;
|
1371 |
} |
1372 |
|
1373 |
iscsilun->iscsi = iscsi; |
1374 |
iscsilun->lun = iscsi_url->lun; |
1375 |
|
1376 |
task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1377 |
|
1378 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1379 |
error_report("iSCSI: failed to send inquiry command.");
|
1380 |
ret = -EINVAL; |
1381 |
goto out;
|
1382 |
} |
1383 |
|
1384 |
inq = scsi_datain_unmarshall(task); |
1385 |
if (inq == NULL) { |
1386 |
error_report("iSCSI: Failed to unmarshall inquiry data.");
|
1387 |
ret = -EINVAL; |
1388 |
goto out;
|
1389 |
} |
1390 |
|
1391 |
iscsilun->type = inq->periperal_device_type; |
1392 |
iscsilun->has_write_same = true;
|
1393 |
|
1394 |
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1395 |
goto out;
|
1396 |
} |
1397 |
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
1398 |
|
1399 |
/* Medium changer or tape. We dont have any emulation for this so this must
|
1400 |
* be sg ioctl compatible. We force it to be sg, otherwise qemu will try
|
1401 |
* to read from the device to guess the image format.
|
1402 |
*/
|
1403 |
if (iscsilun->type == TYPE_MEDIUM_CHANGER ||
|
1404 |
iscsilun->type == TYPE_TAPE) { |
1405 |
bs->sg = 1;
|
1406 |
} |
1407 |
|
1408 |
if (iscsilun->lbpme) {
|
1409 |
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
|
1410 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
1411 |
SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING); |
1412 |
if (task == NULL) { |
1413 |
ret = -EINVAL; |
1414 |
goto out;
|
1415 |
} |
1416 |
inq_lbp = scsi_datain_unmarshall(task); |
1417 |
if (inq_lbp == NULL) { |
1418 |
error_report("iSCSI: failed to unmarshall inquiry datain blob");
|
1419 |
ret = -EINVAL; |
1420 |
goto out;
|
1421 |
} |
1422 |
memcpy(&iscsilun->lbp, inq_lbp, |
1423 |
sizeof(struct scsi_inquiry_logical_block_provisioning)); |
1424 |
scsi_free_scsi_task(task); |
1425 |
task = NULL;
|
1426 |
} |
1427 |
|
1428 |
if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
|
1429 |
struct scsi_inquiry_block_limits *inq_bl;
|
1430 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
1431 |
SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS); |
1432 |
if (task == NULL) { |
1433 |
ret = -EINVAL; |
1434 |
goto out;
|
1435 |
} |
1436 |
inq_bl = scsi_datain_unmarshall(task); |
1437 |
if (inq_bl == NULL) { |
1438 |
error_report("iSCSI: failed to unmarshall inquiry datain blob");
|
1439 |
ret = -EINVAL; |
1440 |
goto out;
|
1441 |
} |
1442 |
memcpy(&iscsilun->bl, inq_bl, |
1443 |
sizeof(struct scsi_inquiry_block_limits)); |
1444 |
scsi_free_scsi_task(task); |
1445 |
task = NULL;
|
1446 |
|
1447 |
if (iscsilun->bl.max_unmap < 0xffffffff) { |
1448 |
bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, |
1449 |
iscsilun); |
1450 |
} |
1451 |
bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, |
1452 |
iscsilun); |
1453 |
|
1454 |
if (iscsilun->bl.max_ws_len < 0xffffffff) { |
1455 |
bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, |
1456 |
iscsilun); |
1457 |
} |
1458 |
bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, |
1459 |
iscsilun); |
1460 |
|
1461 |
bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len, |
1462 |
iscsilun); |
1463 |
} |
1464 |
|
1465 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
1466 |
/* Set up a timer for sending out iSCSI NOPs */
|
1467 |
iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
1468 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
1469 |
#endif
|
1470 |
|
1471 |
out:
|
1472 |
qemu_opts_del(opts); |
1473 |
if (initiator_name != NULL) { |
1474 |
g_free(initiator_name); |
1475 |
} |
1476 |
if (iscsi_url != NULL) { |
1477 |
iscsi_destroy_url(iscsi_url); |
1478 |
} |
1479 |
if (task != NULL) { |
1480 |
scsi_free_scsi_task(task); |
1481 |
} |
1482 |
|
1483 |
if (ret) {
|
1484 |
if (iscsi != NULL) { |
1485 |
iscsi_destroy_context(iscsi); |
1486 |
} |
1487 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1488 |
} |
1489 |
return ret;
|
1490 |
} |
1491 |
|
1492 |
static void iscsi_close(BlockDriverState *bs) |
1493 |
{ |
1494 |
IscsiLun *iscsilun = bs->opaque; |
1495 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
1496 |
|
1497 |
if (iscsilun->nop_timer) {
|
1498 |
timer_del(iscsilun->nop_timer); |
1499 |
timer_free(iscsilun->nop_timer); |
1500 |
} |
1501 |
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
1502 |
iscsi_destroy_context(iscsi); |
1503 |
g_free(iscsilun->zeroblock); |
1504 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1505 |
} |
1506 |
|
1507 |
static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1508 |
{ |
1509 |
IscsiLun *iscsilun = bs->opaque; |
1510 |
int ret = 0; |
1511 |
|
1512 |
if (iscsilun->type != TYPE_DISK) {
|
1513 |
return -ENOTSUP;
|
1514 |
} |
1515 |
|
1516 |
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1517 |
return ret;
|
1518 |
} |
1519 |
|
1520 |
if (offset > iscsi_getlength(bs)) {
|
1521 |
return -EINVAL;
|
1522 |
} |
1523 |
|
1524 |
return 0; |
1525 |
} |
1526 |
|
1527 |
static int iscsi_create(const char *filename, QEMUOptionParameter *options, |
1528 |
Error **errp) |
1529 |
{ |
1530 |
int ret = 0; |
1531 |
int64_t total_size = 0;
|
1532 |
BlockDriverState *bs; |
1533 |
IscsiLun *iscsilun = NULL;
|
1534 |
QDict *bs_options; |
1535 |
|
1536 |
bs = bdrv_new("");
|
1537 |
|
1538 |
/* Read out options */
|
1539 |
while (options && options->name) {
|
1540 |
if (!strcmp(options->name, "size")) { |
1541 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
1542 |
} |
1543 |
options++; |
1544 |
} |
1545 |
|
1546 |
bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
1547 |
iscsilun = bs->opaque; |
1548 |
|
1549 |
bs_options = qdict_new(); |
1550 |
qdict_put(bs_options, "filename", qstring_from_str(filename));
|
1551 |
ret = iscsi_open(bs, bs_options, 0, NULL); |
1552 |
QDECREF(bs_options); |
1553 |
|
1554 |
if (ret != 0) { |
1555 |
goto out;
|
1556 |
} |
1557 |
if (iscsilun->nop_timer) {
|
1558 |
timer_del(iscsilun->nop_timer); |
1559 |
timer_free(iscsilun->nop_timer); |
1560 |
} |
1561 |
if (iscsilun->type != TYPE_DISK) {
|
1562 |
ret = -ENODEV; |
1563 |
goto out;
|
1564 |
} |
1565 |
if (bs->total_sectors < total_size) {
|
1566 |
ret = -ENOSPC; |
1567 |
goto out;
|
1568 |
} |
1569 |
|
1570 |
ret = 0;
|
1571 |
out:
|
1572 |
if (iscsilun->iscsi != NULL) { |
1573 |
iscsi_destroy_context(iscsilun->iscsi); |
1574 |
} |
1575 |
g_free(bs->opaque); |
1576 |
bs->opaque = NULL;
|
1577 |
bdrv_unref(bs); |
1578 |
return ret;
|
1579 |
} |
1580 |
|
1581 |
static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1582 |
{ |
1583 |
IscsiLun *iscsilun = bs->opaque; |
1584 |
bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz; |
1585 |
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; |
1586 |
/* Guess the internal cluster (page) size of the iscsi target by the means
|
1587 |
* of opt_unmap_gran. Transfer the unmap granularity only if it has a
|
1588 |
* reasonable size for bdi->cluster_size */
|
1589 |
if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 && |
1590 |
iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { |
1591 |
bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size; |
1592 |
} |
1593 |
return 0; |
1594 |
} |
1595 |
|
1596 |
static QEMUOptionParameter iscsi_create_options[] = {
|
1597 |
{ |
1598 |
.name = BLOCK_OPT_SIZE, |
1599 |
.type = OPT_SIZE, |
1600 |
.help = "Virtual disk size"
|
1601 |
}, |
1602 |
{ NULL }
|
1603 |
}; |
1604 |
|
1605 |
static BlockDriver bdrv_iscsi = {
|
1606 |
.format_name = "iscsi",
|
1607 |
.protocol_name = "iscsi",
|
1608 |
|
1609 |
.instance_size = sizeof(IscsiLun),
|
1610 |
.bdrv_needs_filename = true,
|
1611 |
.bdrv_file_open = iscsi_open, |
1612 |
.bdrv_close = iscsi_close, |
1613 |
.bdrv_create = iscsi_create, |
1614 |
.create_options = iscsi_create_options, |
1615 |
|
1616 |
.bdrv_getlength = iscsi_getlength, |
1617 |
.bdrv_get_info = iscsi_get_info, |
1618 |
.bdrv_truncate = iscsi_truncate, |
1619 |
|
1620 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
1621 |
.bdrv_co_get_block_status = iscsi_co_get_block_status, |
1622 |
#endif
|
1623 |
.bdrv_co_discard = iscsi_co_discard, |
1624 |
#if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED)
|
1625 |
.bdrv_co_write_zeroes = iscsi_co_write_zeroes, |
1626 |
#endif
|
1627 |
|
1628 |
.bdrv_aio_readv = iscsi_aio_readv, |
1629 |
.bdrv_aio_writev = iscsi_aio_writev, |
1630 |
.bdrv_aio_flush = iscsi_aio_flush, |
1631 |
|
1632 |
#ifdef __linux__
|
1633 |
.bdrv_ioctl = iscsi_ioctl, |
1634 |
.bdrv_aio_ioctl = iscsi_aio_ioctl, |
1635 |
#endif
|
1636 |
}; |
1637 |
|
1638 |
static QemuOptsList qemu_iscsi_opts = {
|
1639 |
.name = "iscsi",
|
1640 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), |
1641 |
.desc = { |
1642 |
{ |
1643 |
.name = "user",
|
1644 |
.type = QEMU_OPT_STRING, |
1645 |
.help = "username for CHAP authentication to target",
|
1646 |
},{ |
1647 |
.name = "password",
|
1648 |
.type = QEMU_OPT_STRING, |
1649 |
.help = "password for CHAP authentication to target",
|
1650 |
},{ |
1651 |
.name = "header-digest",
|
1652 |
.type = QEMU_OPT_STRING, |
1653 |
.help = "HeaderDigest setting. "
|
1654 |
"{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
|
1655 |
},{ |
1656 |
.name = "initiator-name",
|
1657 |
.type = QEMU_OPT_STRING, |
1658 |
.help = "Initiator iqn name to use when connecting",
|
1659 |
}, |
1660 |
{ /* end of list */ }
|
1661 |
}, |
1662 |
}; |
1663 |
|
1664 |
static void iscsi_block_init(void) |
1665 |
{ |
1666 |
bdrv_register(&bdrv_iscsi); |
1667 |
qemu_add_opts(&qemu_iscsi_opts); |
1668 |
} |
1669 |
|
1670 |
block_init(iscsi_block_init); |