2011-10-25 16:24:24 +08:00
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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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*
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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 "qemu-common.h"
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#include "qemu-error.h"
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#include "block_int.h"
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#include "trace.h"
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#include <iscsi/iscsi.h>
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#include <iscsi/scsi-lowlevel.h>
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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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int block_size;
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unsigned long num_blocks;
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2012-05-22 17:56:36 +08:00
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int events;
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2011-10-25 16:24:24 +08:00
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} IscsiLun;
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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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size_t read_size;
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size_t read_offset;
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} IscsiAIOCB;
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struct IscsiTask {
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IscsiLun *iscsilun;
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BlockDriverState *bs;
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int status;
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int complete;
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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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}
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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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acb->common.cb(acb->common.opaque, -ECANCELED);
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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, NULL);
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/* then also cancel the task locally in libiscsi */
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iscsi_scsi_task_cancel(iscsilun->iscsi, acb->task);
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}
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static AIOPool iscsi_aio_pool = {
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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 int iscsi_process_flush(void *arg)
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{
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IscsiLun *iscsilun = arg;
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return iscsi_queue_length(iscsilun->iscsi) > 0;
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}
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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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2012-05-22 17:56:36 +08:00
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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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iscsi_process_flush,
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iscsilun);
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}
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/* If we just added an event, the callback might be delayed
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* unless we call qemu_notify_event().
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*/
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if (ev & ~iscsilun->events) {
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qemu_notify_event();
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}
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iscsilun->events = ev;
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2011-10-25 16:24:24 +08:00
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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_schedule_bh(QEMUBHFunc *cb, IscsiAIOCB *acb)
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{
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acb->bh = qemu_bh_new(cb, acb);
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if (!acb->bh) {
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error_report("oom: could not create iscsi bh");
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return -EIO;
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}
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qemu_bh_schedule(acb->bh);
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return 0;
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}
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static void
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iscsi_readv_writev_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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if (acb->canceled == 0) {
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acb->common.cb(acb->common.opaque, acb->status);
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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_aio_write10_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_write10_cb(iscsi, status, acb, acb->canceled);
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g_free(acb->buf);
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if (acb->canceled != 0) {
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qemu_aio_release(acb);
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scsi_free_scsi_task(acb->task);
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acb->task = NULL;
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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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error_report("Failed to write10 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(iscsi_readv_writev_bh_cb, acb);
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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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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 BlockDriverAIOCB *
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iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
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QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb,
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void *opaque)
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{
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IscsiLun *iscsilun = bs->opaque;
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struct iscsi_context *iscsi = iscsilun->iscsi;
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IscsiAIOCB *acb;
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size_t size;
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int fua = 0;
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/* set FUA on writes when cache mode is write through */
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if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
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fua = 1;
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}
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acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
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trace_iscsi_aio_writev(iscsi, sector_num, nb_sectors, opaque, acb);
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acb->iscsilun = iscsilun;
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acb->qiov = qiov;
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acb->canceled = 0;
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/* XXX we should pass the iovec to write10 to avoid the extra copy */
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/* this will allow us to get rid of 'buf' completely */
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size = nb_sectors * BDRV_SECTOR_SIZE;
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acb->buf = g_malloc(size);
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qemu_iovec_to_buffer(acb->qiov, acb->buf);
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acb->task = iscsi_write10_task(iscsi, iscsilun->lun, acb->buf, size,
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sector_qemu2lun(sector_num, iscsilun),
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fua, 0, iscsilun->block_size,
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iscsi_aio_write10_cb, acb);
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if (acb->task == NULL) {
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error_report("iSCSI: Failed to send write10 command. %s",
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iscsi_get_error(iscsi));
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g_free(acb->buf);
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qemu_aio_release(acb);
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return NULL;
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}
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iscsi_set_events(iscsilun);
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return &acb->common;
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}
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static void
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iscsi_aio_read10_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_read10_cb(iscsi, status, acb, acb->canceled);
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if (acb->canceled != 0) {
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qemu_aio_release(acb);
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scsi_free_scsi_task(acb->task);
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acb->task = NULL;
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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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error_report("Failed to read10 data from 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(iscsi_readv_writev_bh_cb, acb);
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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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static BlockDriverAIOCB *
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iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
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QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb,
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void *opaque)
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{
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IscsiLun *iscsilun = bs->opaque;
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struct iscsi_context *iscsi = iscsilun->iscsi;
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IscsiAIOCB *acb;
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size_t qemu_read_size, lun_read_size;
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int i;
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qemu_read_size = BDRV_SECTOR_SIZE * (size_t)nb_sectors;
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acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
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trace_iscsi_aio_readv(iscsi, sector_num, nb_sectors, opaque, acb);
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acb->iscsilun = iscsilun;
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acb->qiov = qiov;
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acb->canceled = 0;
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acb->read_size = qemu_read_size;
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acb->buf = NULL;
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/* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU
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* may be misaligned to the LUN, so we may need to read some extra
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* data.
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*/
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acb->read_offset = 0;
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if (iscsilun->block_size > BDRV_SECTOR_SIZE) {
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uint64_t bdrv_offset = BDRV_SECTOR_SIZE * sector_num;
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acb->read_offset = bdrv_offset % iscsilun->block_size;
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}
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lun_read_size = (qemu_read_size + iscsilun->block_size
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+ acb->read_offset - 1)
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/ iscsilun->block_size * iscsilun->block_size;
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acb->task = iscsi_read10_task(iscsi, iscsilun->lun,
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sector_qemu2lun(sector_num, iscsilun),
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lun_read_size, iscsilun->block_size,
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iscsi_aio_read10_cb, acb);
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if (acb->task == NULL) {
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error_report("iSCSI: Failed to send read10 command. %s",
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iscsi_get_error(iscsi));
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qemu_aio_release(acb);
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return NULL;
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}
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for (i = 0; i < acb->qiov->niov; i++) {
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scsi_task_add_data_in_buffer(acb->task,
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acb->qiov->iov[i].iov_len,
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acb->qiov->iov[i].iov_base);
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}
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iscsi_set_events(iscsilun);
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return &acb->common;
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}
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static void
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iscsi_synccache10_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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if (acb->canceled != 0) {
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qemu_aio_release(acb);
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scsi_free_scsi_task(acb->task);
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acb->task = NULL;
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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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error_report("Failed to sync10 data on 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(iscsi_readv_writev_bh_cb, acb);
|
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_flush(BlockDriverState *bs,
|
|
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
|
|
|
|
acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
|
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->canceled = 0;
|
|
|
|
|
|
|
|
acb->task = iscsi_synchronizecache10_task(iscsi, iscsilun->lun,
|
|
|
|
0, 0, 0, 0,
|
|
|
|
iscsi_synccache10_cb,
|
|
|
|
acb);
|
|
|
|
if (acb->task == NULL) {
|
|
|
|
error_report("iSCSI: Failed to send synchronizecache10 command. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
|
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2012-04-24 14:29:04 +08:00
|
|
|
static void
|
|
|
|
iscsi_unmap_cb(struct iscsi_context *iscsi, int status,
|
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
|
|
|
if (acb->canceled != 0) {
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
|
|
|
if (status < 0) {
|
|
|
|
error_report("Failed to unmap data on iSCSI lun. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_schedule_bh(iscsi_readv_writev_bh_cb, acb);
|
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_discard(BlockDriverState *bs,
|
|
|
|
int64_t sector_num, int nb_sectors,
|
|
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
struct unmap_list list[1];
|
|
|
|
|
|
|
|
acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
|
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->canceled = 0;
|
|
|
|
|
|
|
|
list[0].lba = sector_qemu2lun(sector_num, iscsilun);
|
|
|
|
list[0].num = nb_sectors * BDRV_SECTOR_SIZE / iscsilun->block_size;
|
|
|
|
|
|
|
|
acb->task = iscsi_unmap_task(iscsi, iscsilun->lun,
|
|
|
|
0, 0, &list[0], 1,
|
|
|
|
iscsi_unmap_cb,
|
|
|
|
acb);
|
|
|
|
if (acb->task == NULL) {
|
|
|
|
error_report("iSCSI: Failed to send unmap command. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
|
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static int64_t
|
|
|
|
iscsi_getlength(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
int64_t len;
|
|
|
|
|
|
|
|
len = iscsilun->num_blocks;
|
|
|
|
len *= iscsilun->block_size;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2012-04-24 14:29:04 +08:00
|
|
|
iscsi_readcapacity16_cb(struct iscsi_context *iscsi, int status,
|
2011-10-25 16:24:24 +08:00
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
struct IscsiTask *itask = opaque;
|
2012-04-24 14:29:04 +08:00
|
|
|
struct scsi_readcapacity16 *rc16;
|
2011-10-25 16:24:24 +08:00
|
|
|
struct scsi_task *task = command_data;
|
|
|
|
|
|
|
|
if (status != 0) {
|
|
|
|
error_report("iSCSI: Failed to read capacity of iSCSI lun. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
itask->status = 1;
|
|
|
|
itask->complete = 1;
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-04-24 14:29:04 +08:00
|
|
|
rc16 = scsi_datain_unmarshall(task);
|
|
|
|
if (rc16 == NULL) {
|
|
|
|
error_report("iSCSI: Failed to unmarshall readcapacity16 data.");
|
2011-10-25 16:24:24 +08:00
|
|
|
itask->status = 1;
|
|
|
|
itask->complete = 1;
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-04-24 14:29:04 +08:00
|
|
|
itask->iscsilun->block_size = rc16->block_length;
|
|
|
|
itask->iscsilun->num_blocks = rc16->returned_lba + 1;
|
|
|
|
itask->bs->total_sectors = itask->iscsilun->num_blocks *
|
|
|
|
itask->iscsilun->block_size / BDRV_SECTOR_SIZE ;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
itask->status = 0;
|
|
|
|
itask->complete = 1;
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_connect_cb(struct iscsi_context *iscsi, int status, void *command_data,
|
|
|
|
void *opaque)
|
|
|
|
{
|
|
|
|
struct IscsiTask *itask = opaque;
|
|
|
|
struct scsi_task *task;
|
|
|
|
|
|
|
|
if (status != 0) {
|
|
|
|
itask->status = 1;
|
|
|
|
itask->complete = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-04-24 14:29:04 +08:00
|
|
|
task = iscsi_readcapacity16_task(iscsi, itask->iscsilun->lun,
|
|
|
|
iscsi_readcapacity16_cb, opaque);
|
2011-10-25 16:24:24 +08:00
|
|
|
if (task == NULL) {
|
2012-04-24 14:29:04 +08:00
|
|
|
error_report("iSCSI: failed to send readcapacity16 command.");
|
2011-10-25 16:24:24 +08:00
|
|
|
itask->status = 1;
|
|
|
|
itask->complete = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
static int parse_chap(struct iscsi_context *iscsi, const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *user = NULL;
|
|
|
|
const char *password = NULL;
|
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
|
|
if (!list) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
opts = qemu_opts_find(list, target);
|
|
|
|
if (opts == NULL) {
|
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
if (!opts) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
user = qemu_opt_get(opts, "user");
|
|
|
|
if (!user) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
password = qemu_opt_get(opts, "password");
|
|
|
|
if (!password) {
|
|
|
|
error_report("CHAP username specified but no password was given");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
|
|
|
error_report("Failed to set initiator username and password");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void parse_header_digest(struct iscsi_context *iscsi, const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *digest = NULL;
|
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
|
|
if (!list) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
opts = qemu_opts_find(list, target);
|
|
|
|
if (opts == NULL) {
|
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
if (!opts) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
digest = qemu_opt_get(opts, "header-digest");
|
|
|
|
if (!digest) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(digest, "CRC32C")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C);
|
|
|
|
} else if (!strcmp(digest, "NONE")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE);
|
|
|
|
} else if (!strcmp(digest, "CRC32C-NONE")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE);
|
|
|
|
} else if (!strcmp(digest, "NONE-CRC32C")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
|
|
|
|
} else {
|
|
|
|
error_report("Invalid header-digest setting : %s", digest);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *parse_initiator_name(const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *name = NULL;
|
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
|
|
if (!list) {
|
|
|
|
return g_strdup("iqn.2008-11.org.linux-kvm");
|
|
|
|
}
|
|
|
|
|
|
|
|
opts = qemu_opts_find(list, target);
|
|
|
|
if (opts == NULL) {
|
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
if (!opts) {
|
|
|
|
return g_strdup("iqn.2008-11.org.linux-kvm");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
name = qemu_opt_get(opts, "initiator-name");
|
|
|
|
if (!name) {
|
|
|
|
return g_strdup("iqn.2008-11.org.linux-kvm");
|
|
|
|
}
|
|
|
|
|
|
|
|
return g_strdup(name);
|
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
/*
|
|
|
|
* We support iscsi url's on the form
|
|
|
|
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
|
|
|
*/
|
|
|
|
static int iscsi_open(BlockDriverState *bs, const char *filename, int flags)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = NULL;
|
|
|
|
struct iscsi_url *iscsi_url = NULL;
|
|
|
|
struct IscsiTask task;
|
2012-01-26 06:39:02 +08:00
|
|
|
char *initiator_name = NULL;
|
2011-10-25 16:24:24 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if ((BDRV_SECTOR_SIZE % 512) != 0) {
|
|
|
|
error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. "
|
|
|
|
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
|
|
|
|
"of 512", BDRV_SECTOR_SIZE);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_url = iscsi_parse_full_url(iscsi, filename);
|
|
|
|
if (iscsi_url == NULL) {
|
|
|
|
error_report("Failed to parse URL : %s %s", filename,
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
|
|
|
|
initiator_name = parse_initiator_name(iscsi_url->target);
|
|
|
|
|
|
|
|
iscsi = iscsi_create_context(initiator_name);
|
|
|
|
if (iscsi == NULL) {
|
|
|
|
error_report("iSCSI: Failed to create iSCSI context.");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
|
|
|
error_report("iSCSI: Failed to set target name.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_url->user != NULL) {
|
|
|
|
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user,
|
|
|
|
iscsi_url->passwd);
|
|
|
|
if (ret != 0) {
|
|
|
|
error_report("Failed to set initiator username and password");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
}
|
2012-01-26 06:39:02 +08:00
|
|
|
|
|
|
|
/* check if we got CHAP username/password via the options */
|
|
|
|
if (parse_chap(iscsi, iscsi_url->target) != 0) {
|
|
|
|
error_report("iSCSI: Failed to set CHAP user/password");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
|
|
|
|
error_report("iSCSI: Failed to set session type to normal.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
/* check if we got HEADER_DIGEST via the options */
|
|
|
|
parse_header_digest(iscsi, iscsi_url->target);
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
task.iscsilun = iscsilun;
|
|
|
|
task.status = 0;
|
|
|
|
task.complete = 0;
|
|
|
|
task.bs = bs;
|
|
|
|
|
|
|
|
iscsilun->iscsi = iscsi;
|
|
|
|
iscsilun->lun = iscsi_url->lun;
|
|
|
|
|
|
|
|
if (iscsi_full_connect_async(iscsi, iscsi_url->portal, iscsi_url->lun,
|
|
|
|
iscsi_connect_cb, &task)
|
|
|
|
!= 0) {
|
|
|
|
error_report("iSCSI: Failed to start async connect.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (!task.complete) {
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
qemu_aio_wait();
|
|
|
|
}
|
|
|
|
if (task.status != 0) {
|
|
|
|
error_report("iSCSI: Failed to connect to LUN : %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_url != NULL) {
|
|
|
|
iscsi_destroy_url(iscsi_url);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
failed:
|
2012-01-26 06:39:02 +08:00
|
|
|
if (initiator_name != NULL) {
|
|
|
|
g_free(initiator_name);
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_url != NULL) {
|
|
|
|
iscsi_destroy_url(iscsi_url);
|
|
|
|
}
|
|
|
|
if (iscsi != NULL) {
|
|
|
|
iscsi_destroy_context(iscsi);
|
|
|
|
}
|
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void iscsi_close(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
|
2012-04-12 20:00:54 +08:00
|
|
|
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL, NULL);
|
2011-10-25 16:24:24 +08:00
|
|
|
iscsi_destroy_context(iscsi);
|
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriver bdrv_iscsi = {
|
|
|
|
.format_name = "iscsi",
|
|
|
|
.protocol_name = "iscsi",
|
|
|
|
|
|
|
|
.instance_size = sizeof(IscsiLun),
|
|
|
|
.bdrv_file_open = iscsi_open,
|
|
|
|
.bdrv_close = iscsi_close,
|
|
|
|
|
|
|
|
.bdrv_getlength = iscsi_getlength,
|
|
|
|
|
|
|
|
.bdrv_aio_readv = iscsi_aio_readv,
|
|
|
|
.bdrv_aio_writev = iscsi_aio_writev,
|
|
|
|
.bdrv_aio_flush = iscsi_aio_flush,
|
2012-04-24 14:29:04 +08:00
|
|
|
|
|
|
|
.bdrv_aio_discard = iscsi_aio_discard,
|
2011-10-25 16:24:24 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static void iscsi_block_init(void)
|
|
|
|
{
|
|
|
|
bdrv_register(&bdrv_iscsi);
|
|
|
|
}
|
|
|
|
|
|
|
|
block_init(iscsi_block_init);
|