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Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001/*
2 * QEMU Block driver for iSCSI images
3 *
4 * Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
Peter Lievenaef172f2017-12-08 12:51:07 +01005 * Copyright (c) 2012-2017 Peter Lieven <pl@kamp.de>
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11006 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
Peter Maydell80c71a22016-01-18 18:01:42 +000026#include "qemu/osdep.h"
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110027
28#include <poll.h>
Peter Lievenefc6de02014-05-30 23:36:47 +020029#include <math.h>
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +100030#include <arpa/inet.h>
Markus Armbrustera8d25322019-05-23 16:35:08 +020031#include "qemu-common.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010032#include "qemu/config-file.h"
33#include "qemu/error-report.h"
Peter Lievenb03c3802014-04-28 13:11:32 +020034#include "qemu/bitops.h"
35#include "qemu/bitmap.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010036#include "block/block_int.h"
Max Reitz609f45e2018-06-14 21:14:28 +020037#include "block/qdict.h"
Paolo Bonzini08e2c9f2017-08-22 09:23:55 +020038#include "scsi/constants.h"
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -070039#include "qemu/iov.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020040#include "qemu/module.h"
Markus Armbruster922a01a2018-02-01 12:18:46 +010041#include "qemu/option.h"
Fam Zhengcea25272016-09-21 12:27:14 +080042#include "qemu/uuid.h"
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +030043#include "sysemu/replay.h"
Markus Armbrustere688df62018-02-01 12:18:31 +010044#include "qapi/error.h"
Philippe Mathieu-Daudéf68c0142020-09-13 21:53:45 +020045#include "qapi/qapi-commands-machine.h"
Markus Armbruster452fcdb2018-02-01 12:18:39 +010046#include "qapi/qmp/qdict.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010047#include "qapi/qmp/qstring.h"
Daniel P. Berrangeb1893462016-01-21 14:19:21 +000048#include "crypto/secret.h"
Paolo Bonzinie5b57282017-08-22 07:08:27 +020049#include "scsi/utils.h"
Fam Zhengecc983a2018-07-10 14:31:16 +080050#include "trace.h"
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110051
Paolo Bonzinie5b57282017-08-22 07:08:27 +020052/* Conflict between scsi/utils.h and libiscsi! :( */
53#define SCSI_XFER_NONE ISCSI_XFER_NONE
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110054#include <iscsi/iscsi.h>
Thomas Huthdf71ca82019-01-14 14:37:20 +010055#define inline __attribute__((gnu_inline)) /* required for libiscsi v1.9.0 */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110056#include <iscsi/scsi-lowlevel.h>
Thomas Huthdf71ca82019-01-14 14:37:20 +010057#undef inline
Paolo Bonzinie5b57282017-08-22 07:08:27 +020058#undef SCSI_XFER_NONE
59QEMU_BUILD_BUG_ON((int)SCSI_XFER_NONE != (int)ISCSI_XFER_NONE);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110060
Ronnie Sahlberg98392452012-05-25 21:59:01 +100061#ifdef __linux__
62#include <scsi/sg.h>
Ronnie Sahlberg98392452012-05-25 21:59:01 +100063#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110064
65typedef struct IscsiLun {
66 struct iscsi_context *iscsi;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +020067 AioContext *aio_context;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110068 int lun;
Ronnie Sahlbergdbfff6d2012-05-25 21:59:01 +100069 enum scsi_inquiry_peripheral_device_type type;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110070 int block_size;
Paolo Bonzinic7b4a952012-05-26 09:41:13 +020071 uint64_t num_blocks;
Ronnie Sahlbergc9b9f682012-05-22 19:56:36 +100072 int events;
Peter Lieven5b5d34e2012-12-06 10:46:47 +010073 QEMUTimer *nop_timer;
Peter Lieven05b685f2015-04-07 22:08:15 +020074 QEMUTimer *event_timer;
Paolo Bonzinid045c462017-02-22 19:07:25 +010075 QemuMutex mutex;
Peter Lievenf18a7cb2013-07-19 09:19:39 +020076 struct scsi_inquiry_logical_block_provisioning lbp;
77 struct scsi_inquiry_block_limits bl;
Fam Zhengcc9743c2018-06-01 17:26:44 +080078 struct scsi_inquiry_device_designator *dd;
Peter Lievend4cd9612013-10-24 12:07:02 +020079 unsigned char *zeroblock;
Peter Lievene1123a32016-07-18 10:52:20 +020080 /* The allocmap tracks which clusters (pages) on the iSCSI target are
81 * allocated and which are not. In case a target returns zeros for
82 * unallocated pages (iscsilun->lprz) we can directly return zeros instead
83 * of reading zeros over the wire if a read request falls within an
84 * unallocated block. As there are 3 possible states we need 2 bitmaps to
85 * track. allocmap_valid keeps track if QEMU's information about a page is
86 * valid. allocmap tracks if a page is allocated or not. In case QEMU has no
87 * valid information about a page the corresponding allocmap entry should be
88 * switched to unallocated as well to force a new lookup of the allocation
89 * status as lookups are generally skipped if a page is suspect to be
90 * allocated. If a iSCSI target is opened with cache.direct = on the
91 * allocmap_valid does not exist turning all cached information invalid so
92 * that a fresh lookup is made for any page even if allocmap entry returns
93 * it's unallocated. */
94 unsigned long *allocmap;
95 unsigned long *allocmap_valid;
96 long allocmap_size;
Eric Blakeba059e72018-02-13 14:26:46 -060097 int cluster_size;
Peter Lieven9281fe92014-06-04 15:47:39 +020098 bool use_16_for_rw;
Fam Zheng43ae8fb2015-02-25 12:40:08 +080099 bool write_protected;
Peter Lieven0a386e42015-04-16 16:08:26 +0200100 bool lbpme;
101 bool lbprz;
Peter Lieven752ce452015-04-16 16:08:28 +0200102 bool dpofua;
Peter Lieven0a386e42015-04-16 16:08:26 +0200103 bool has_write_same;
Peter Lieven5dd7a532015-06-16 13:45:07 +0200104 bool request_timed_out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100105} IscsiLun;
106
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200107typedef struct IscsiTask {
108 int status;
109 int complete;
110 int retries;
111 int do_retry;
112 struct scsi_task *task;
113 Coroutine *co;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200114 IscsiLun *iscsilun;
Peter Lievenefc6de02014-05-30 23:36:47 +0200115 QEMUTimer retry_timer;
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800116 int err_code;
Peter Lievene38bc232017-12-08 12:51:08 +0100117 char *err_str;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200118} IscsiTask;
119
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100120typedef struct IscsiAIOCB {
Markus Armbruster7c84b1b2014-10-07 13:59:14 +0200121 BlockAIOCB common;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100122 QEMUBH *bh;
123 IscsiLun *iscsilun;
124 struct scsi_task *task;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100125 int status;
Peter Lieven1dde7162013-02-21 16:15:54 +0100126 int64_t sector_num;
127 int nb_sectors;
Fam Zheng4bb17ab2015-11-09 18:16:49 +0800128 int ret;
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000129#ifdef __linux__
130 sg_io_hdr_t *ioh;
131#endif
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100132 bool cancelled;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100133} IscsiAIOCB;
134
Peter Lieven5dd7a532015-06-16 13:45:07 +0200135/* libiscsi uses time_t so its enough to process events every second */
136#define EVENT_INTERVAL 1000
Peter Lieven5b5d34e2012-12-06 10:46:47 +0100137#define NOP_INTERVAL 5000
138#define MAX_NOP_FAILURES 3
Peter Lievenefc6de02014-05-30 23:36:47 +0200139#define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times)
Peter Lieven59dd0a22015-04-16 16:08:30 +0200140static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048, 8192, 32768};
Peter Lieven5b5d34e2012-12-06 10:46:47 +0100141
Stefan Weil5d831be2014-06-13 20:42:57 +0200142/* this threshold is a trade-off knob to choose between
Peter Lieven5917af82014-04-28 17:11:33 +0200143 * the potential additional overhead of an extra GET_LBA_STATUS request
144 * vs. unnecessarily reading a lot of zero sectors over the wire.
145 * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES
146 * sectors we check the allocation status of the area covered by the
147 * request first if the allocationmap indicates that the area might be
148 * unallocated. */
149#define ISCSI_CHECKALLOC_THRES 64
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100150
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100151#ifdef __linux__
152
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100153static void
Paolo Bonzinicfb3f502012-08-18 23:38:03 +0200154iscsi_bh_cb(void *p)
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200155{
156 IscsiAIOCB *acb = p;
157
158 qemu_bh_delete(acb->bh);
159
Fam Zheng722d9332014-09-11 13:41:15 +0800160 acb->common.cb(acb->common.opaque, acb->status);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200161
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200162 if (acb->task != NULL) {
163 scsi_free_scsi_task(acb->task);
164 acb->task = NULL;
165 }
166
Fam Zheng80074292014-09-11 13:41:28 +0800167 qemu_aio_unref(acb);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200168}
169
Paolo Bonzinicfb3f502012-08-18 23:38:03 +0200170static void
171iscsi_schedule_bh(IscsiAIOCB *acb)
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200172{
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200173 if (acb->bh) {
174 return;
175 }
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200176 acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200177 qemu_bh_schedule(acb->bh);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200178}
179
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100180#endif
181
Peter Lieven8b9dfe92013-12-14 17:31:40 +0100182static void iscsi_co_generic_bh_cb(void *opaque)
183{
184 struct IscsiTask *iTask = opaque;
Paolo Bonzini19196312017-02-13 14:52:31 +0100185
Peter Lievenfcd470d2014-06-10 09:52:16 +0200186 iTask->complete = 1;
Paolo Bonzini19196312017-02-13 14:52:31 +0100187 aio_co_wake(iTask->co);
Peter Lieven8b9dfe92013-12-14 17:31:40 +0100188}
189
Peter Lievenefc6de02014-05-30 23:36:47 +0200190static void iscsi_retry_timer_expired(void *opaque)
191{
192 struct IscsiTask *iTask = opaque;
Peter Lievenfcd470d2014-06-10 09:52:16 +0200193 iTask->complete = 1;
Peter Lievenefc6de02014-05-30 23:36:47 +0200194 if (iTask->co) {
Paolo Bonzini2f47da52017-02-13 14:52:29 +0100195 aio_co_wake(iTask->co);
Peter Lievenefc6de02014-05-30 23:36:47 +0200196 }
197}
198
199static inline unsigned exp_random(double mean)
200{
201 return -mean * log((double)rand() / RAND_MAX);
202}
203
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800204/* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in
205 * libiscsi 1.10.0, together with other constants we need. Use it as
206 * a hint that we have to define them ourselves if needed, to keep the
207 * minimum required libiscsi version at 1.9.0. We use an ASCQ macro for
208 * the test because SCSI_STATUS_* is an enum.
209 *
210 * To guard against future changes where SCSI_SENSE_ASCQ_* also becomes
211 * an enum, check against the LIBISCSI_API_VERSION macro, which was
212 * introduced in 1.11.0. If it is present, there is no need to define
213 * anything.
214 */
215#if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \
216 !defined(LIBISCSI_API_VERSION)
217#define SCSI_STATUS_TASK_SET_FULL 0x28
218#define SCSI_STATUS_TIMEOUT 0x0f000002
219#define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600
220#define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00
Peter Lieven90497362015-06-26 12:18:01 +0200221#endif
222
Roy Shterman583ec222016-10-09 11:14:55 +0300223#ifndef LIBISCSI_API_VERSION
224#define LIBISCSI_API_VERSION 20130701
225#endif
226
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800227static int iscsi_translate_sense(struct scsi_sense *sense)
228{
Paolo Bonzini8c460262019-07-02 11:40:41 +0200229 return scsi_sense_to_errno(sense->key,
230 (sense->ascq & 0xFF00) >> 8,
231 sense->ascq & 0xFF);
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800232}
233
Paolo Bonzinid045c462017-02-22 19:07:25 +0100234/* Called (via iscsi_service) with QemuMutex held. */
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200235static void
236iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
237 void *command_data, void *opaque)
238{
239 struct IscsiTask *iTask = opaque;
240 struct scsi_task *task = command_data;
241
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200242 iTask->status = status;
243 iTask->do_retry = 0;
Xie Yongjic58daf72020-07-01 18:54:44 +0800244 iTask->err_code = 0;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200245 iTask->task = task;
246
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200247 if (status != SCSI_STATUS_GOOD) {
Xie Yongjic58daf72020-07-01 18:54:44 +0800248 iTask->err_code = -EIO;
Peter Lievenefc6de02014-05-30 23:36:47 +0200249 if (iTask->retries++ < ISCSI_CMD_RETRIES) {
Peter Lieven90497362015-06-26 12:18:01 +0200250 if (status == SCSI_STATUS_BUSY ||
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800251 status == SCSI_STATUS_TIMEOUT ||
252 status == SCSI_STATUS_TASK_SET_FULL) {
Peter Lievenefc6de02014-05-30 23:36:47 +0200253 unsigned retry_time =
254 exp_random(iscsi_retry_times[iTask->retries - 1]);
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800255 if (status == SCSI_STATUS_TIMEOUT) {
Peter Lieven5dd7a532015-06-16 13:45:07 +0200256 /* make sure the request is rescheduled AFTER the
257 * reconnect is initiated */
258 retry_time = EVENT_INTERVAL * 2;
259 iTask->iscsilun->request_timed_out = true;
260 }
261 error_report("iSCSI Busy/TaskSetFull/TimeOut"
262 " (retry #%u in %u ms): %s",
Peter Lievenefc6de02014-05-30 23:36:47 +0200263 iTask->retries, retry_time,
264 iscsi_get_error(iscsi));
265 aio_timer_init(iTask->iscsilun->aio_context,
266 &iTask->retry_timer, QEMU_CLOCK_REALTIME,
267 SCALE_MS, iscsi_retry_timer_expired, iTask);
268 timer_mod(&iTask->retry_timer,
269 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time);
270 iTask->do_retry = 1;
Xie Yongjidd3b0022020-07-01 18:54:43 +0800271 } else if (status == SCSI_STATUS_CHECK_CONDITION) {
272 int error = iscsi_translate_sense(&task->sense);
273 if (error == EAGAIN) {
274 error_report("iSCSI CheckCondition: %s",
275 iscsi_get_error(iscsi));
276 iTask->do_retry = 1;
277 } else {
278 iTask->err_code = -error;
279 iTask->err_str = g_strdup(iscsi_get_error(iscsi));
280 }
Peter Lievenefc6de02014-05-30 23:36:47 +0200281 }
282 }
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200283 }
284
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200285 if (iTask->co) {
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +0300286 replay_bh_schedule_oneshot_event(iTask->iscsilun->aio_context,
287 iscsi_co_generic_bh_cb, iTask);
Peter Lievenfcd470d2014-06-10 09:52:16 +0200288 } else {
289 iTask->complete = 1;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200290 }
291}
292
293static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask)
294{
295 *iTask = (struct IscsiTask) {
Peter Lievenefc6de02014-05-30 23:36:47 +0200296 .co = qemu_coroutine_self(),
Peter Lievenefc6de02014-05-30 23:36:47 +0200297 .iscsilun = iscsilun,
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200298 };
299}
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200300
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100301#ifdef __linux__
302
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100303/* Called (via iscsi_service) with QemuMutex held. */
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200304static void
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100305iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data,
306 void *private_data)
307{
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200308 IscsiAIOCB *acb = private_data;
309
Stefan Hajnoczi88e94fd2018-02-15 11:15:26 +0000310 /* If the command callback hasn't been called yet, drop the task */
311 if (!acb->bh) {
312 /* Call iscsi_aio_ioctl_cb() with SCSI_STATUS_CANCELLED */
313 iscsi_scsi_cancel_task(iscsi, acb->task);
314 }
315
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100316 qemu_aio_unref(acb); /* acquired in iscsi_aio_cancel() */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100317}
318
319static void
Markus Armbruster7c84b1b2014-10-07 13:59:14 +0200320iscsi_aio_cancel(BlockAIOCB *blockacb)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100321{
322 IscsiAIOCB *acb = (IscsiAIOCB *)blockacb;
323 IscsiLun *iscsilun = acb->iscsilun;
324
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100325 qemu_mutex_lock(&iscsilun->mutex);
326
327 /* If it was cancelled or completed already, our work is done here */
328 if (acb->cancelled || acb->status != -EINPROGRESS) {
329 qemu_mutex_unlock(&iscsilun->mutex);
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200330 return;
331 }
332
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100333 acb->cancelled = true;
Paolo Bonzinib2090912012-08-19 00:12:39 +0200334
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100335 qemu_aio_ref(acb); /* released in iscsi_abort_task_cb() */
336
337 /* send a task mgmt call to the target to cancel the task on the target */
338 if (iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
339 iscsi_abort_task_cb, acb) < 0) {
340 qemu_aio_unref(acb); /* since iscsi_abort_task_cb() won't be called */
341 }
342
343 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100344}
345
Stefan Hajnoczid7331be2012-10-31 16:34:37 +0100346static const AIOCBInfo iscsi_aiocb_info = {
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100347 .aiocb_size = sizeof(IscsiAIOCB),
Fam Zheng722d9332014-09-11 13:41:15 +0800348 .cancel_async = iscsi_aio_cancel,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100349};
350
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100351#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100352
353static void iscsi_process_read(void *arg);
354static void iscsi_process_write(void *arg);
355
Paolo Bonzinid045c462017-02-22 19:07:25 +0100356/* Called with QemuMutex held. */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100357static void
358iscsi_set_events(IscsiLun *iscsilun)
359{
360 struct iscsi_context *iscsi = iscsilun->iscsi;
Peter Lieven05b685f2015-04-07 22:08:15 +0200361 int ev = iscsi_which_events(iscsi);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100362
Ronnie Sahlbergc9b9f682012-05-22 19:56:36 +1000363 if (ev != iscsilun->events) {
Fam Zhengdca21ef2015-10-23 11:08:05 +0800364 aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsi),
365 false,
Peter Lieven05b685f2015-04-07 22:08:15 +0200366 (ev & POLLIN) ? iscsi_process_read : NULL,
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200367 (ev & POLLOUT) ? iscsi_process_write : NULL,
Stefan Hajnoczif6a51c82016-12-01 19:26:41 +0000368 NULL,
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200369 iscsilun);
Peter Lieven05b685f2015-04-07 22:08:15 +0200370 iscsilun->events = ev;
Ronnie Sahlbergc9b9f682012-05-22 19:56:36 +1000371 }
Peter Lieven05b685f2015-04-07 22:08:15 +0200372}
373
Peter Lieven5dd7a532015-06-16 13:45:07 +0200374static void iscsi_timed_check_events(void *opaque)
Peter Lieven05b685f2015-04-07 22:08:15 +0200375{
376 IscsiLun *iscsilun = opaque;
Peter Lieven5dd7a532015-06-16 13:45:07 +0200377
Stefan Hajnoczi83d11972018-02-03 07:16:20 +0100378 qemu_mutex_lock(&iscsilun->mutex);
379
Peter Lieven5dd7a532015-06-16 13:45:07 +0200380 /* check for timed out requests */
381 iscsi_service(iscsilun->iscsi, 0);
382
383 if (iscsilun->request_timed_out) {
384 iscsilun->request_timed_out = false;
385 iscsi_reconnect(iscsilun->iscsi);
386 }
387
388 /* newer versions of libiscsi may return zero events. Ensure we are able
389 * to return to service once this situation changes. */
Peter Lieven05b685f2015-04-07 22:08:15 +0200390 iscsi_set_events(iscsilun);
Peter Lieven5dd7a532015-06-16 13:45:07 +0200391
Stefan Hajnoczi83d11972018-02-03 07:16:20 +0100392 qemu_mutex_unlock(&iscsilun->mutex);
393
Peter Lieven5dd7a532015-06-16 13:45:07 +0200394 timer_mod(iscsilun->event_timer,
395 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100396}
397
398static void
399iscsi_process_read(void *arg)
400{
401 IscsiLun *iscsilun = arg;
402 struct iscsi_context *iscsi = iscsilun->iscsi;
403
Paolo Bonzinid045c462017-02-22 19:07:25 +0100404 qemu_mutex_lock(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100405 iscsi_service(iscsi, POLLIN);
406 iscsi_set_events(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100407 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100408}
409
410static void
411iscsi_process_write(void *arg)
412{
413 IscsiLun *iscsilun = arg;
414 struct iscsi_context *iscsi = iscsilun->iscsi;
415
Paolo Bonzinid045c462017-02-22 19:07:25 +0100416 qemu_mutex_lock(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100417 iscsi_service(iscsi, POLLOUT);
418 iscsi_set_events(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100419 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100420}
421
Peter Lieven0777b5d2013-07-11 14:16:25 +0200422static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun)
423{
424 return sector * iscsilun->block_size / BDRV_SECTOR_SIZE;
425}
426
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100427static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
428{
429 return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
430}
431
Eric Blake94d047a2016-06-01 15:10:05 -0600432static bool is_byte_request_lun_aligned(int64_t offset, int count,
433 IscsiLun *iscsilun)
Peter Lieven91bea4e2013-07-11 14:16:27 +0200434{
Eric Blake94d047a2016-06-01 15:10:05 -0600435 if (offset % iscsilun->block_size || count % iscsilun->block_size) {
436 error_report("iSCSI misaligned request: "
437 "iscsilun->block_size %u, offset %" PRIi64
438 ", count %d",
439 iscsilun->block_size, offset, count);
440 return false;
Peter Lieven91bea4e2013-07-11 14:16:27 +0200441 }
Eric Blake94d047a2016-06-01 15:10:05 -0600442 return true;
443}
444
445static bool is_sector_request_lun_aligned(int64_t sector_num, int nb_sectors,
446 IscsiLun *iscsilun)
447{
Peter Lieven0ead9312016-06-20 11:24:40 +0200448 assert(nb_sectors <= BDRV_REQUEST_MAX_SECTORS);
Eric Blake94d047a2016-06-01 15:10:05 -0600449 return is_byte_request_lun_aligned(sector_num << BDRV_SECTOR_BITS,
450 nb_sectors << BDRV_SECTOR_BITS,
451 iscsilun);
Peter Lieven91bea4e2013-07-11 14:16:27 +0200452}
453
Peter Lievene1123a32016-07-18 10:52:20 +0200454static void iscsi_allocmap_free(IscsiLun *iscsilun)
Peter Lievena9fe4c92014-09-30 09:09:12 +0200455{
Peter Lievene1123a32016-07-18 10:52:20 +0200456 g_free(iscsilun->allocmap);
457 g_free(iscsilun->allocmap_valid);
458 iscsilun->allocmap = NULL;
459 iscsilun->allocmap_valid = NULL;
Peter Lievena9fe4c92014-09-30 09:09:12 +0200460}
461
Peter Lievene1123a32016-07-18 10:52:20 +0200462
463static int iscsi_allocmap_init(IscsiLun *iscsilun, int open_flags)
Peter Lievenb03c3802014-04-28 13:11:32 +0200464{
Peter Lievene1123a32016-07-18 10:52:20 +0200465 iscsi_allocmap_free(iscsilun);
466
Eric Blakeba059e72018-02-13 14:26:46 -0600467 assert(iscsilun->cluster_size);
Peter Lievene1123a32016-07-18 10:52:20 +0200468 iscsilun->allocmap_size =
Eric Blakeba059e72018-02-13 14:26:46 -0600469 DIV_ROUND_UP(iscsilun->num_blocks * iscsilun->block_size,
470 iscsilun->cluster_size);
Peter Lievene1123a32016-07-18 10:52:20 +0200471
472 iscsilun->allocmap = bitmap_try_new(iscsilun->allocmap_size);
473 if (!iscsilun->allocmap) {
474 return -ENOMEM;
Peter Lievenb03c3802014-04-28 13:11:32 +0200475 }
Peter Lievene1123a32016-07-18 10:52:20 +0200476
477 if (open_flags & BDRV_O_NOCACHE) {
Eric Blakeba059e72018-02-13 14:26:46 -0600478 /* when cache.direct = on all allocmap entries are
Peter Lievene1123a32016-07-18 10:52:20 +0200479 * treated as invalid to force a relookup of the block
480 * status on every read request */
481 return 0;
482 }
483
484 iscsilun->allocmap_valid = bitmap_try_new(iscsilun->allocmap_size);
485 if (!iscsilun->allocmap_valid) {
486 /* if we are under memory pressure free the allocmap as well */
487 iscsi_allocmap_free(iscsilun);
488 return -ENOMEM;
489 }
490
491 return 0;
Peter Lievenb03c3802014-04-28 13:11:32 +0200492}
493
Peter Lievene1123a32016-07-18 10:52:20 +0200494static void
Eric Blake04a408f2018-02-13 14:26:47 -0600495iscsi_allocmap_update(IscsiLun *iscsilun, int64_t offset,
496 int64_t bytes, bool allocated, bool valid)
Peter Lievenb03c3802014-04-28 13:11:32 +0200497{
Peter Lievene1123a32016-07-18 10:52:20 +0200498 int64_t cl_num_expanded, nb_cls_expanded, cl_num_shrunk, nb_cls_shrunk;
499
500 if (iscsilun->allocmap == NULL) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200501 return;
502 }
Peter Lievene1123a32016-07-18 10:52:20 +0200503 /* expand to entirely contain all affected clusters */
Eric Blake04a408f2018-02-13 14:26:47 -0600504 assert(iscsilun->cluster_size);
505 cl_num_expanded = offset / iscsilun->cluster_size;
506 nb_cls_expanded = DIV_ROUND_UP(offset + bytes,
507 iscsilun->cluster_size) - cl_num_expanded;
Peter Lievene1123a32016-07-18 10:52:20 +0200508 /* shrink to touch only completely contained clusters */
Eric Blake04a408f2018-02-13 14:26:47 -0600509 cl_num_shrunk = DIV_ROUND_UP(offset, iscsilun->cluster_size);
510 nb_cls_shrunk = (offset + bytes) / iscsilun->cluster_size - cl_num_shrunk;
Peter Lievene1123a32016-07-18 10:52:20 +0200511 if (allocated) {
512 bitmap_set(iscsilun->allocmap, cl_num_expanded, nb_cls_expanded);
513 } else {
Peter Lieven1da45e02017-01-16 16:17:12 +0100514 if (nb_cls_shrunk > 0) {
515 bitmap_clear(iscsilun->allocmap, cl_num_shrunk, nb_cls_shrunk);
516 }
Peter Lievenb03c3802014-04-28 13:11:32 +0200517 }
Peter Lievene1123a32016-07-18 10:52:20 +0200518
519 if (iscsilun->allocmap_valid == NULL) {
520 return;
521 }
522 if (valid) {
Peter Lieven1da45e02017-01-16 16:17:12 +0100523 if (nb_cls_shrunk > 0) {
524 bitmap_set(iscsilun->allocmap_valid, cl_num_shrunk, nb_cls_shrunk);
525 }
Peter Lievene1123a32016-07-18 10:52:20 +0200526 } else {
527 bitmap_clear(iscsilun->allocmap_valid, cl_num_expanded,
528 nb_cls_expanded);
529 }
530}
531
532static void
Eric Blake04a408f2018-02-13 14:26:47 -0600533iscsi_allocmap_set_allocated(IscsiLun *iscsilun, int64_t offset,
534 int64_t bytes)
Peter Lievene1123a32016-07-18 10:52:20 +0200535{
Eric Blake04a408f2018-02-13 14:26:47 -0600536 iscsi_allocmap_update(iscsilun, offset, bytes, true, true);
Peter Lievene1123a32016-07-18 10:52:20 +0200537}
538
539static void
Eric Blake04a408f2018-02-13 14:26:47 -0600540iscsi_allocmap_set_unallocated(IscsiLun *iscsilun, int64_t offset,
541 int64_t bytes)
Peter Lievene1123a32016-07-18 10:52:20 +0200542{
543 /* Note: if cache.direct=on the fifth argument to iscsi_allocmap_update
544 * is ignored, so this will in effect be an iscsi_allocmap_set_invalid.
545 */
Eric Blake04a408f2018-02-13 14:26:47 -0600546 iscsi_allocmap_update(iscsilun, offset, bytes, false, true);
Peter Lievene1123a32016-07-18 10:52:20 +0200547}
548
Eric Blake04a408f2018-02-13 14:26:47 -0600549static void iscsi_allocmap_set_invalid(IscsiLun *iscsilun, int64_t offset,
550 int64_t bytes)
Peter Lievene1123a32016-07-18 10:52:20 +0200551{
Eric Blake04a408f2018-02-13 14:26:47 -0600552 iscsi_allocmap_update(iscsilun, offset, bytes, false, false);
Peter Lievene1123a32016-07-18 10:52:20 +0200553}
554
555static void iscsi_allocmap_invalidate(IscsiLun *iscsilun)
556{
557 if (iscsilun->allocmap) {
558 bitmap_zero(iscsilun->allocmap, iscsilun->allocmap_size);
559 }
560 if (iscsilun->allocmap_valid) {
561 bitmap_zero(iscsilun->allocmap_valid, iscsilun->allocmap_size);
562 }
563}
564
565static inline bool
Eric Blake04a408f2018-02-13 14:26:47 -0600566iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_t offset,
567 int64_t bytes)
Peter Lievene1123a32016-07-18 10:52:20 +0200568{
569 unsigned long size;
570 if (iscsilun->allocmap == NULL) {
571 return true;
572 }
Eric Blakeba059e72018-02-13 14:26:46 -0600573 assert(iscsilun->cluster_size);
Eric Blake04a408f2018-02-13 14:26:47 -0600574 size = DIV_ROUND_UP(offset + bytes, iscsilun->cluster_size);
Peter Lievene1123a32016-07-18 10:52:20 +0200575 return !(find_next_bit(iscsilun->allocmap, size,
Eric Blake04a408f2018-02-13 14:26:47 -0600576 offset / iscsilun->cluster_size) == size);
Peter Lievene1123a32016-07-18 10:52:20 +0200577}
578
579static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun,
Eric Blake04a408f2018-02-13 14:26:47 -0600580 int64_t offset, int64_t bytes)
Peter Lievene1123a32016-07-18 10:52:20 +0200581{
582 unsigned long size;
583 if (iscsilun->allocmap_valid == NULL) {
584 return false;
585 }
Eric Blakeba059e72018-02-13 14:26:46 -0600586 assert(iscsilun->cluster_size);
Eric Blake04a408f2018-02-13 14:26:47 -0600587 size = DIV_ROUND_UP(offset + bytes, iscsilun->cluster_size);
Peter Lievene1123a32016-07-18 10:52:20 +0200588 return (find_next_zero_bit(iscsilun->allocmap_valid, size,
Eric Blake04a408f2018-02-13 14:26:47 -0600589 offset / iscsilun->cluster_size) == size);
Peter Lievenb03c3802014-04-28 13:11:32 +0200590}
591
Fam Zheng66e75c02018-06-01 17:26:45 +0800592static void coroutine_fn iscsi_co_wait_for_task(IscsiTask *iTask,
593 IscsiLun *iscsilun)
594{
595 while (!iTask->complete) {
596 iscsi_set_events(iscsilun);
597 qemu_mutex_unlock(&iscsilun->mutex);
598 qemu_coroutine_yield();
599 qemu_mutex_lock(&iscsilun->mutex);
600 }
601}
602
Kevin Wolf9f0eb9e2016-03-10 13:55:50 +0100603static int coroutine_fn
Eric Blakee18a58b2018-04-24 17:01:57 -0500604iscsi_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
605 QEMUIOVector *iov, int flags)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100606{
Peter Lieven063c3372013-12-05 16:47:17 +0100607 IscsiLun *iscsilun = bs->opaque;
608 struct IscsiTask iTask;
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000609 uint64_t lba;
Peter Lieven063c3372013-12-05 16:47:17 +0100610 uint32_t num_sectors;
Eric Blake4df863f2016-05-03 16:39:06 -0600611 bool fua = flags & BDRV_REQ_FUA;
Paolo Bonzinid045c462017-02-22 19:07:25 +0100612 int r = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100613
Eric Blake4df863f2016-05-03 16:39:06 -0600614 if (fua) {
615 assert(iscsilun->dpofua);
616 }
Eric Blake94d047a2016-06-01 15:10:05 -0600617 if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
Peter Lieven063c3372013-12-05 16:47:17 +0100618 return -EINVAL;
619 }
620
Eric Blake6bd01f12016-07-15 12:32:04 -0600621 if (bs->bl.max_transfer) {
622 assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer);
Peter Lievendc9e7162014-10-27 10:18:48 +0100623 }
624
Peter Lieven063c3372013-12-05 16:47:17 +0100625 lba = sector_qemu2lun(sector_num, iscsilun);
626 num_sectors = sector_qemu2lun(nb_sectors, iscsilun);
Peter Lieven063c3372013-12-05 16:47:17 +0100627 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100628 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven063c3372013-12-05 16:47:17 +0100629retry:
Peter Lieven9281fe92014-06-04 15:47:39 +0200630 if (iscsilun->use_16_for_rw) {
Roy Shterman583ec222016-10-09 11:14:55 +0300631#if LIBISCSI_API_VERSION >= (20160603)
632 iTask.task = iscsi_write16_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
633 NULL, num_sectors * iscsilun->block_size,
634 iscsilun->block_size, 0, 0, fua, 0, 0,
635 iscsi_co_generic_cb, &iTask,
636 (struct scsi_iovec *)iov->iov, iov->niov);
637 } else {
638 iTask.task = iscsi_write10_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
639 NULL, num_sectors * iscsilun->block_size,
640 iscsilun->block_size, 0, 0, fua, 0, 0,
641 iscsi_co_generic_cb, &iTask,
642 (struct scsi_iovec *)iov->iov, iov->niov);
643 }
644#else
Peter Lieven9281fe92014-06-04 15:47:39 +0200645 iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba,
Peter Lieven8c215a92014-06-18 18:40:22 +0200646 NULL, num_sectors * iscsilun->block_size,
Peter Lieven73b53942015-04-16 16:08:29 +0200647 iscsilun->block_size, 0, 0, fua, 0, 0,
Peter Lieven9281fe92014-06-04 15:47:39 +0200648 iscsi_co_generic_cb, &iTask);
649 } else {
650 iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba,
Peter Lieven8c215a92014-06-18 18:40:22 +0200651 NULL, num_sectors * iscsilun->block_size,
Peter Lieven73b53942015-04-16 16:08:29 +0200652 iscsilun->block_size, 0, 0, fua, 0, 0,
Peter Lieven9281fe92014-06-04 15:47:39 +0200653 iscsi_co_generic_cb, &iTask);
654 }
Roy Shterman583ec222016-10-09 11:14:55 +0300655#endif
Peter Lieven063c3372013-12-05 16:47:17 +0100656 if (iTask.task == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +0100657 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +0100658 return -ENOMEM;
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000659 }
Roy Shterman583ec222016-10-09 11:14:55 +0300660#if LIBISCSI_API_VERSION < (20160603)
Peter Lieven063c3372013-12-05 16:47:17 +0100661 scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov,
662 iov->niov);
Roy Shterman583ec222016-10-09 11:14:55 +0300663#endif
Fam Zheng66e75c02018-06-01 17:26:45 +0800664 iscsi_co_wait_for_task(&iTask, iscsilun);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100665
Peter Lieven063c3372013-12-05 16:47:17 +0100666 if (iTask.task != NULL) {
667 scsi_free_scsi_task(iTask.task);
668 iTask.task = NULL;
669 }
670
671 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +0100672 iTask.complete = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100673 goto retry;
674 }
675
Peter Lieven063c3372013-12-05 16:47:17 +0100676 if (iTask.status != SCSI_STATUS_GOOD) {
Eric Blake04a408f2018-02-13 14:26:47 -0600677 iscsi_allocmap_set_invalid(iscsilun, sector_num * BDRV_SECTOR_SIZE,
678 nb_sectors * BDRV_SECTOR_SIZE);
Peter Lievene38bc232017-12-08 12:51:08 +0100679 error_report("iSCSI WRITE10/16 failed at lba %" PRIu64 ": %s", lba,
680 iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100681 r = iTask.err_code;
682 goto out_unlock;
Peter Lieven063c3372013-12-05 16:47:17 +0100683 }
Peter Lieven7371d562012-12-03 20:35:15 +0100684
Eric Blake04a408f2018-02-13 14:26:47 -0600685 iscsi_allocmap_set_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE,
686 nb_sectors * BDRV_SECTOR_SIZE);
Peter Lievenb03c3802014-04-28 13:11:32 +0200687
Paolo Bonzinid045c462017-02-22 19:07:25 +0100688out_unlock:
689 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +0100690 g_free(iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100691 return r;
Peter Lieven1dde7162013-02-21 16:15:54 +0100692}
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100693
Peter Lievenb03c3802014-04-28 13:11:32 +0200694
Peter Lievenb03c3802014-04-28 13:11:32 +0200695
Eric Blake92809c32018-02-13 14:26:48 -0600696static int coroutine_fn iscsi_co_block_status(BlockDriverState *bs,
697 bool want_zero, int64_t offset,
698 int64_t bytes, int64_t *pnum,
699 int64_t *map,
700 BlockDriverState **file)
Peter Lievenb03c3802014-04-28 13:11:32 +0200701{
702 IscsiLun *iscsilun = bs->opaque;
703 struct scsi_get_lba_status *lbas = NULL;
704 struct scsi_lba_status_descriptor *lbasd = NULL;
705 struct IscsiTask iTask;
Felipe Franciosi693fd2a2020-01-23 12:44:59 +0000706 uint64_t lba, max_bytes;
Eric Blake92809c32018-02-13 14:26:48 -0600707 int ret;
Peter Lievenb03c3802014-04-28 13:11:32 +0200708
Peter Lieven79f9c752018-01-08 16:27:27 +0100709 iscsi_co_init_iscsitask(iscsilun, &iTask);
710
Eric Blake92809c32018-02-13 14:26:48 -0600711 assert(QEMU_IS_ALIGNED(offset | bytes, iscsilun->block_size));
Peter Lievenb03c3802014-04-28 13:11:32 +0200712
713 /* default to all sectors allocated */
Eric Blake92809c32018-02-13 14:26:48 -0600714 ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
715 if (map) {
716 *map = offset;
717 }
718 *pnum = bytes;
Peter Lievenb03c3802014-04-28 13:11:32 +0200719
720 /* LUN does not support logical block provisioning */
Peter Lieven0a386e42015-04-16 16:08:26 +0200721 if (!iscsilun->lbpme) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200722 goto out;
723 }
724
Eric Blake92809c32018-02-13 14:26:48 -0600725 lba = offset / iscsilun->block_size;
Felipe Franciosi693fd2a2020-01-23 12:44:59 +0000726 max_bytes = (iscsilun->num_blocks - lba) * iscsilun->block_size;
Peter Lievene38bc232017-12-08 12:51:08 +0100727
Paolo Bonzinid045c462017-02-22 19:07:25 +0100728 qemu_mutex_lock(&iscsilun->mutex);
Peter Lievenb03c3802014-04-28 13:11:32 +0200729retry:
730 if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun,
Peter Lievene38bc232017-12-08 12:51:08 +0100731 lba, 8 + 16, iscsi_co_generic_cb,
Peter Lievenb03c3802014-04-28 13:11:32 +0200732 &iTask) == NULL) {
733 ret = -ENOMEM;
Paolo Bonzinid045c462017-02-22 19:07:25 +0100734 goto out_unlock;
Peter Lievenb03c3802014-04-28 13:11:32 +0200735 }
Fam Zheng66e75c02018-06-01 17:26:45 +0800736 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lievenb03c3802014-04-28 13:11:32 +0200737
738 if (iTask.do_retry) {
739 if (iTask.task != NULL) {
740 scsi_free_scsi_task(iTask.task);
741 iTask.task = NULL;
742 }
743 iTask.complete = 0;
744 goto retry;
745 }
746
747 if (iTask.status != SCSI_STATUS_GOOD) {
748 /* in case the get_lba_status_callout fails (i.e.
749 * because the device is busy or the cmd is not
750 * supported) we pretend all blocks are allocated
751 * for backwards compatibility */
Peter Lievene38bc232017-12-08 12:51:08 +0100752 error_report("iSCSI GET_LBA_STATUS failed at lba %" PRIu64 ": %s",
753 lba, iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100754 goto out_unlock;
Peter Lievenb03c3802014-04-28 13:11:32 +0200755 }
756
757 lbas = scsi_datain_unmarshall(iTask.task);
Kevin Wolf5fbf1d52020-01-23 18:00:54 +0100758 if (lbas == NULL || lbas->num_descriptors == 0) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200759 ret = -EIO;
Paolo Bonzinid045c462017-02-22 19:07:25 +0100760 goto out_unlock;
Peter Lievenb03c3802014-04-28 13:11:32 +0200761 }
762
763 lbasd = &lbas->descriptors[0];
764
Eric Blake92809c32018-02-13 14:26:48 -0600765 if (lba != lbasd->lba) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200766 ret = -EIO;
Paolo Bonzinid045c462017-02-22 19:07:25 +0100767 goto out_unlock;
Peter Lievenb03c3802014-04-28 13:11:32 +0200768 }
769
Felipe Franciosi693fd2a2020-01-23 12:44:59 +0000770 *pnum = MIN((int64_t) lbasd->num_blocks * iscsilun->block_size, max_bytes);
Peter Lievenb03c3802014-04-28 13:11:32 +0200771
772 if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED ||
773 lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) {
774 ret &= ~BDRV_BLOCK_DATA;
775 if (iscsilun->lbprz) {
776 ret |= BDRV_BLOCK_ZERO;
777 }
778 }
779
780 if (ret & BDRV_BLOCK_ZERO) {
Eric Blake92809c32018-02-13 14:26:48 -0600781 iscsi_allocmap_set_unallocated(iscsilun, offset, *pnum);
Peter Lievenb03c3802014-04-28 13:11:32 +0200782 } else {
Eric Blake92809c32018-02-13 14:26:48 -0600783 iscsi_allocmap_set_allocated(iscsilun, offset, *pnum);
Peter Lievenb03c3802014-04-28 13:11:32 +0200784 }
785
Eric Blake92809c32018-02-13 14:26:48 -0600786 if (*pnum > bytes) {
787 *pnum = bytes;
Peter Lievenb03c3802014-04-28 13:11:32 +0200788 }
Paolo Bonzinid045c462017-02-22 19:07:25 +0100789out_unlock:
790 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +0100791 g_free(iTask.err_str);
Peter Lievenb03c3802014-04-28 13:11:32 +0200792out:
793 if (iTask.task != NULL) {
794 scsi_free_scsi_task(iTask.task);
795 }
Eric Blake92809c32018-02-13 14:26:48 -0600796 if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID && file) {
Fam Zheng33998332016-01-26 11:58:52 +0800797 *file = bs;
798 }
Peter Lievenb03c3802014-04-28 13:11:32 +0200799 return ret;
800}
801
Peter Lieven063c3372013-12-05 16:47:17 +0100802static int coroutine_fn iscsi_co_readv(BlockDriverState *bs,
803 int64_t sector_num, int nb_sectors,
804 QEMUIOVector *iov)
Peter Lieven1dde7162013-02-21 16:15:54 +0100805{
806 IscsiLun *iscsilun = bs->opaque;
Peter Lieven063c3372013-12-05 16:47:17 +0100807 struct IscsiTask iTask;
Peter Lieven1dde7162013-02-21 16:15:54 +0100808 uint64_t lba;
809 uint32_t num_sectors;
Peter Lievene38bc232017-12-08 12:51:08 +0100810 int r = 0;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100811
Eric Blake94d047a2016-06-01 15:10:05 -0600812 if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
Peter Lieven063c3372013-12-05 16:47:17 +0100813 return -EINVAL;
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000814 }
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000815
Eric Blake6bd01f12016-07-15 12:32:04 -0600816 if (bs->bl.max_transfer) {
817 assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer);
Peter Lievendc9e7162014-10-27 10:18:48 +0100818 }
819
Peter Lievene1123a32016-07-18 10:52:20 +0200820 /* if cache.direct is off and we have a valid entry in our allocation map
821 * we can skip checking the block status and directly return zeroes if
822 * the request falls within an unallocated area */
Eric Blake04a408f2018-02-13 14:26:47 -0600823 if (iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE,
824 nb_sectors * BDRV_SECTOR_SIZE) &&
825 !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE,
826 nb_sectors * BDRV_SECTOR_SIZE)) {
Peter Lievene1123a32016-07-18 10:52:20 +0200827 qemu_iovec_memset(iov, 0, 0x00, iov->size);
828 return 0;
829 }
830
831 if (nb_sectors >= ISCSI_CHECKALLOC_THRES &&
Eric Blake04a408f2018-02-13 14:26:47 -0600832 !iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE,
833 nb_sectors * BDRV_SECTOR_SIZE) &&
834 !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE,
835 nb_sectors * BDRV_SECTOR_SIZE)) {
Eric Blake92809c32018-02-13 14:26:48 -0600836 int64_t pnum;
Peter Lievene1123a32016-07-18 10:52:20 +0200837 /* check the block status from the beginning of the cluster
838 * containing the start sector */
Eric Blake92809c32018-02-13 14:26:48 -0600839 int64_t head;
840 int ret;
Eric Blakeba059e72018-02-13 14:26:46 -0600841
Eric Blake92809c32018-02-13 14:26:48 -0600842 assert(iscsilun->cluster_size);
843 head = (sector_num * BDRV_SECTOR_SIZE) % iscsilun->cluster_size;
844 ret = iscsi_co_block_status(bs, true,
845 sector_num * BDRV_SECTOR_SIZE - head,
846 BDRV_REQUEST_MAX_BYTES, &pnum, NULL, NULL);
Peter Lievenb03c3802014-04-28 13:11:32 +0200847 if (ret < 0) {
848 return ret;
849 }
Peter Lievene1123a32016-07-18 10:52:20 +0200850 /* if the whole request falls into an unallocated area we can avoid
Eric Blakeba059e72018-02-13 14:26:46 -0600851 * reading and directly return zeroes instead */
Peter Lievene1123a32016-07-18 10:52:20 +0200852 if (ret & BDRV_BLOCK_ZERO &&
Eric Blake92809c32018-02-13 14:26:48 -0600853 pnum >= nb_sectors * BDRV_SECTOR_SIZE + head) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200854 qemu_iovec_memset(iov, 0, 0x00, iov->size);
855 return 0;
856 }
857 }
Peter Lievenb03c3802014-04-28 13:11:32 +0200858
Peter Lieven063c3372013-12-05 16:47:17 +0100859 lba = sector_qemu2lun(sector_num, iscsilun);
860 num_sectors = sector_qemu2lun(nb_sectors, iscsilun);
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000861
Peter Lieven063c3372013-12-05 16:47:17 +0100862 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100863 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven063c3372013-12-05 16:47:17 +0100864retry:
Peter Lieven9281fe92014-06-04 15:47:39 +0200865 if (iscsilun->use_16_for_rw) {
Roy Shterman583ec222016-10-09 11:14:55 +0300866#if LIBISCSI_API_VERSION >= (20160603)
867 iTask.task = iscsi_read16_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
868 num_sectors * iscsilun->block_size,
869 iscsilun->block_size, 0, 0, 0, 0, 0,
870 iscsi_co_generic_cb, &iTask,
871 (struct scsi_iovec *)iov->iov, iov->niov);
872 } else {
873 iTask.task = iscsi_read10_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
874 num_sectors * iscsilun->block_size,
875 iscsilun->block_size,
876 0, 0, 0, 0, 0,
877 iscsi_co_generic_cb, &iTask,
878 (struct scsi_iovec *)iov->iov, iov->niov);
879 }
880#else
Peter Lieven063c3372013-12-05 16:47:17 +0100881 iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba,
882 num_sectors * iscsilun->block_size,
883 iscsilun->block_size, 0, 0, 0, 0, 0,
884 iscsi_co_generic_cb, &iTask);
Peter Lieven9281fe92014-06-04 15:47:39 +0200885 } else {
Peter Lieven063c3372013-12-05 16:47:17 +0100886 iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba,
887 num_sectors * iscsilun->block_size,
Stefan Weil219c2522013-12-17 08:57:10 +0100888 iscsilun->block_size,
Stefan Weil219c2522013-12-17 08:57:10 +0100889 0, 0, 0, 0, 0,
Peter Lieven063c3372013-12-05 16:47:17 +0100890 iscsi_co_generic_cb, &iTask);
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000891 }
Roy Shterman583ec222016-10-09 11:14:55 +0300892#endif
Peter Lieven063c3372013-12-05 16:47:17 +0100893 if (iTask.task == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +0100894 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +0100895 return -ENOMEM;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100896 }
Roy Shterman583ec222016-10-09 11:14:55 +0300897#if LIBISCSI_API_VERSION < (20160603)
Peter Lieven063c3372013-12-05 16:47:17 +0100898 scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov);
Roy Shterman583ec222016-10-09 11:14:55 +0300899#endif
Peter Lieven91bea4e2013-07-11 14:16:27 +0200900
Fam Zheng66e75c02018-06-01 17:26:45 +0800901 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lieven063c3372013-12-05 16:47:17 +0100902 if (iTask.task != NULL) {
903 scsi_free_scsi_task(iTask.task);
904 iTask.task = NULL;
Peter Lieven1dde7162013-02-21 16:15:54 +0100905 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100906
Peter Lieven063c3372013-12-05 16:47:17 +0100907 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +0100908 iTask.complete = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100909 goto retry;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100910 }
911
Peter Lieven063c3372013-12-05 16:47:17 +0100912 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +0100913 error_report("iSCSI READ10/16 failed at lba %" PRIu64 ": %s",
914 lba, iTask.err_str);
915 r = iTask.err_code;
Peter Lieven1dde7162013-02-21 16:15:54 +0100916 }
917
Peter Lievene38bc232017-12-08 12:51:08 +0100918 qemu_mutex_unlock(&iscsilun->mutex);
919 g_free(iTask.err_str);
920 return r;
Peter Lieven1dde7162013-02-21 16:15:54 +0100921}
922
Peter Lieven063c3372013-12-05 16:47:17 +0100923static int coroutine_fn iscsi_co_flush(BlockDriverState *bs)
Peter Lieven1dde7162013-02-21 16:15:54 +0100924{
925 IscsiLun *iscsilun = bs->opaque;
Peter Lieven063c3372013-12-05 16:47:17 +0100926 struct IscsiTask iTask;
Peter Lievene38bc232017-12-08 12:51:08 +0100927 int r = 0;
Peter Lieven1dde7162013-02-21 16:15:54 +0100928
Peter Lieven73b53942015-04-16 16:08:29 +0200929 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100930 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven063c3372013-12-05 16:47:17 +0100931retry:
932 if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0,
933 0, iscsi_co_generic_cb, &iTask) == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +0100934 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +0100935 return -ENOMEM;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100936 }
937
Fam Zheng66e75c02018-06-01 17:26:45 +0800938 iscsi_co_wait_for_task(&iTask, iscsilun);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100939
Peter Lieven063c3372013-12-05 16:47:17 +0100940 if (iTask.task != NULL) {
941 scsi_free_scsi_task(iTask.task);
942 iTask.task = NULL;
943 }
944
945 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +0100946 iTask.complete = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100947 goto retry;
948 }
949
950 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +0100951 error_report("iSCSI SYNCHRONIZECACHE10 failed: %s", iTask.err_str);
952 r = iTask.err_code;
Peter Lieven063c3372013-12-05 16:47:17 +0100953 }
954
Peter Lievene38bc232017-12-08 12:51:08 +0100955 qemu_mutex_unlock(&iscsilun->mutex);
956 g_free(iTask.err_str);
957 return r;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100958}
959
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000960#ifdef __linux__
Paolo Bonzinid045c462017-02-22 19:07:25 +0100961/* Called (via iscsi_service) with QemuMutex held. */
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000962static void
963iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status,
964 void *command_data, void *opaque)
965{
966 IscsiAIOCB *acb = opaque;
967
Stefan Hajnoczi88e94fd2018-02-15 11:15:26 +0000968 if (status == SCSI_STATUS_CANCELLED) {
969 if (!acb->bh) {
970 acb->status = -ECANCELED;
971 iscsi_schedule_bh(acb);
972 }
973 return;
974 }
975
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000976 acb->status = 0;
977 if (status < 0) {
978 error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
979 iscsi_get_error(iscsi));
Paolo Bonzini8c460262019-07-02 11:40:41 +0200980 acb->status = -iscsi_translate_sense(&acb->task->sense);
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000981 }
982
983 acb->ioh->driver_status = 0;
984 acb->ioh->host_status = 0;
985 acb->ioh->resid = 0;
Vadim Rozenfeld644c6869d2016-05-13 13:03:22 +0200986 acb->ioh->status = status;
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000987
988#define SG_ERR_DRIVER_SENSE 0x08
989
990 if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) {
991 int ss;
992
993 acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE;
994
995 acb->ioh->sb_len_wr = acb->task->datain.size - 2;
Chen Qunff0507c2020-04-18 14:26:02 +0800996 ss = MIN(acb->ioh->mx_sb_len, acb->ioh->sb_len_wr);
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000997 memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
998 }
999
Paolo Bonzinicfb3f502012-08-18 23:38:03 +02001000 iscsi_schedule_bh(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001001}
1002
Fam Zheng4bb17ab2015-11-09 18:16:49 +08001003static void iscsi_ioctl_bh_completion(void *opaque)
1004{
1005 IscsiAIOCB *acb = opaque;
1006
1007 qemu_bh_delete(acb->bh);
1008 acb->common.cb(acb->common.opaque, acb->ret);
1009 qemu_aio_unref(acb);
1010}
1011
1012static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf)
1013{
1014 BlockDriverState *bs = acb->common.bs;
1015 IscsiLun *iscsilun = bs->opaque;
1016 int ret = 0;
1017
1018 switch (req) {
1019 case SG_GET_VERSION_NUM:
1020 *(int *)buf = 30000;
1021 break;
1022 case SG_GET_SCSI_ID:
1023 ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
1024 break;
1025 default:
1026 ret = -EINVAL;
1027 }
1028 assert(!acb->bh);
1029 acb->bh = aio_bh_new(bdrv_get_aio_context(bs),
1030 iscsi_ioctl_bh_completion, acb);
1031 acb->ret = ret;
1032 qemu_bh_schedule(acb->bh);
1033}
1034
Markus Armbruster7c84b1b2014-10-07 13:59:14 +02001035static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001036 unsigned long int req, void *buf,
Markus Armbruster097310b2014-10-07 13:59:15 +02001037 BlockCompletionFunc *cb, void *opaque)
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001038{
1039 IscsiLun *iscsilun = bs->opaque;
1040 struct iscsi_context *iscsi = iscsilun->iscsi;
1041 struct iscsi_data data;
1042 IscsiAIOCB *acb;
1043
Stefan Hajnoczid7331be2012-10-31 16:34:37 +01001044 acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001045
1046 acb->iscsilun = iscsilun;
Paolo Bonzini1bd075f2012-08-18 23:35:49 +02001047 acb->bh = NULL;
1048 acb->status = -EINPROGRESS;
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001049 acb->ioh = buf;
Stefan Hajnoczic1004482018-02-03 07:16:21 +01001050 acb->cancelled = false;
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001051
Fam Zheng4bb17ab2015-11-09 18:16:49 +08001052 if (req != SG_IO) {
1053 iscsi_ioctl_handle_emulated(acb, req, buf);
1054 return &acb->common;
1055 }
1056
Peter Lievena6b31672016-05-24 10:59:28 +02001057 if (acb->ioh->cmd_len > SCSI_CDB_MAX_SIZE) {
1058 error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)",
1059 acb->ioh->cmd_len, SCSI_CDB_MAX_SIZE);
1060 qemu_aio_unref(acb);
1061 return NULL;
1062 }
1063
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001064 acb->task = malloc(sizeof(struct scsi_task));
1065 if (acb->task == NULL) {
1066 error_report("iSCSI: Failed to allocate task for scsi command. %s",
1067 iscsi_get_error(iscsi));
Fam Zheng80074292014-09-11 13:41:28 +08001068 qemu_aio_unref(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001069 return NULL;
1070 }
1071 memset(acb->task, 0, sizeof(struct scsi_task));
1072
1073 switch (acb->ioh->dxfer_direction) {
1074 case SG_DXFER_TO_DEV:
1075 acb->task->xfer_dir = SCSI_XFER_WRITE;
1076 break;
1077 case SG_DXFER_FROM_DEV:
1078 acb->task->xfer_dir = SCSI_XFER_READ;
1079 break;
1080 default:
1081 acb->task->xfer_dir = SCSI_XFER_NONE;
1082 break;
1083 }
1084
1085 acb->task->cdb_size = acb->ioh->cmd_len;
1086 memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
1087 acb->task->expxferlen = acb->ioh->dxfer_len;
1088
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001089 data.size = 0;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001090 qemu_mutex_lock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001091 if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001092 if (acb->ioh->iovec_count == 0) {
1093 data.data = acb->ioh->dxferp;
1094 data.size = acb->ioh->dxfer_len;
1095 } else {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001096 scsi_task_set_iov_out(acb->task,
1097 (struct scsi_iovec *) acb->ioh->dxferp,
1098 acb->ioh->iovec_count);
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001099 }
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001100 }
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001101
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001102 if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
1103 iscsi_aio_ioctl_cb,
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001104 (data.size > 0) ? &data : NULL,
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001105 acb) != 0) {
Paolo Bonzinid045c462017-02-22 19:07:25 +01001106 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001107 scsi_free_scsi_task(acb->task);
Fam Zheng80074292014-09-11 13:41:28 +08001108 qemu_aio_unref(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001109 return NULL;
1110 }
1111
1112 /* tell libiscsi to read straight into the buffer we got from ioctl */
1113 if (acb->task->xfer_dir == SCSI_XFER_READ) {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001114 if (acb->ioh->iovec_count == 0) {
1115 scsi_task_add_data_in_buffer(acb->task,
1116 acb->ioh->dxfer_len,
1117 acb->ioh->dxferp);
1118 } else {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001119 scsi_task_set_iov_in(acb->task,
1120 (struct scsi_iovec *) acb->ioh->dxferp,
1121 acb->ioh->iovec_count);
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001122 }
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001123 }
1124
1125 iscsi_set_events(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001126 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001127
1128 return &acb->common;
1129}
1130
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001131#endif
1132
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001133static int64_t
1134iscsi_getlength(BlockDriverState *bs)
1135{
1136 IscsiLun *iscsilun = bs->opaque;
1137 int64_t len;
1138
1139 len = iscsilun->num_blocks;
1140 len *= iscsilun->block_size;
1141
1142 return len;
1143}
1144
Peter Lieven65f3e332013-07-19 09:19:41 +02001145static int
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001146coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
Peter Lieven65f3e332013-07-19 09:19:41 +02001147{
1148 IscsiLun *iscsilun = bs->opaque;
1149 struct IscsiTask iTask;
1150 struct unmap_list list;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001151 int r = 0;
Peter Lieven65f3e332013-07-19 09:19:41 +02001152
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001153 if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
Eric Blake49228d12016-11-17 14:13:57 -06001154 return -ENOTSUP;
1155 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001156
1157 if (!iscsilun->lbp.lbpu) {
1158 /* UNMAP is not supported by the target */
1159 return 0;
1160 }
1161
Eric Blake97c7e852016-07-15 17:23:01 -06001162 list.lba = offset / iscsilun->block_size;
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001163 list.num = bytes / iscsilun->block_size;
Peter Lieven65f3e332013-07-19 09:19:41 +02001164
Peter Lieven01a6a232013-10-24 12:07:01 +02001165 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001166 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven01a6a232013-10-24 12:07:01 +02001167retry:
1168 if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1,
Eric Blake97c7e852016-07-15 17:23:01 -06001169 iscsi_co_generic_cb, &iTask) == NULL) {
Paolo Bonzinid045c462017-02-22 19:07:25 +01001170 r = -ENOMEM;
1171 goto out_unlock;
Peter Lieven65f3e332013-07-19 09:19:41 +02001172 }
1173
Fam Zheng66e75c02018-06-01 17:26:45 +08001174 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lieven65f3e332013-07-19 09:19:41 +02001175
Peter Lieven01a6a232013-10-24 12:07:01 +02001176 if (iTask.task != NULL) {
1177 scsi_free_scsi_task(iTask.task);
1178 iTask.task = NULL;
1179 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001180
Peter Lieven01a6a232013-10-24 12:07:01 +02001181 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +01001182 iTask.complete = 0;
Peter Lieven01a6a232013-10-24 12:07:01 +02001183 goto retry;
1184 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001185
Eric Blake04a408f2018-02-13 14:26:47 -06001186 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievenaef172f2017-12-08 12:51:07 +01001187
Peter Lieven01a6a232013-10-24 12:07:01 +02001188 if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
1189 /* the target might fail with a check condition if it
1190 is not happy with the alignment of the UNMAP request
1191 we silently fail in this case */
Paolo Bonzinid045c462017-02-22 19:07:25 +01001192 goto out_unlock;
Peter Lieven01a6a232013-10-24 12:07:01 +02001193 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001194
Peter Lieven01a6a232013-10-24 12:07:01 +02001195 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +01001196 error_report("iSCSI UNMAP failed at lba %" PRIu64 ": %s",
1197 list.lba, iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001198 r = iTask.err_code;
1199 goto out_unlock;
Peter Lieven65f3e332013-07-19 09:19:41 +02001200 }
1201
Paolo Bonzinid045c462017-02-22 19:07:25 +01001202out_unlock:
1203 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +01001204 g_free(iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001205 return r;
Peter Lieven65f3e332013-07-19 09:19:41 +02001206}
1207
Peter Lievend4cd9612013-10-24 12:07:02 +02001208static int
Eric Blake94d047a2016-06-01 15:10:05 -06001209coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001210 int bytes, BdrvRequestFlags flags)
Peter Lievend4cd9612013-10-24 12:07:02 +02001211{
1212 IscsiLun *iscsilun = bs->opaque;
1213 struct IscsiTask iTask;
1214 uint64_t lba;
1215 uint32_t nb_blocks;
Peter Lieven9281fe92014-06-04 15:47:39 +02001216 bool use_16_for_ws = iscsilun->use_16_for_rw;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001217 int r = 0;
Peter Lievend4cd9612013-10-24 12:07:02 +02001218
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001219 if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
Eric Blake94d047a2016-06-01 15:10:05 -06001220 return -ENOTSUP;
Peter Lievend4cd9612013-10-24 12:07:02 +02001221 }
1222
Peter Lieven9281fe92014-06-04 15:47:39 +02001223 if (flags & BDRV_REQ_MAY_UNMAP) {
1224 if (!use_16_for_ws && !iscsilun->lbp.lbpws10) {
1225 /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */
1226 use_16_for_ws = true;
1227 }
1228 if (use_16_for_ws && !iscsilun->lbp.lbpws) {
1229 /* WRITESAME16 with UNMAP is not supported by the target,
1230 * fall back and try WRITESAME10/16 without UNMAP */
1231 flags &= ~BDRV_REQ_MAY_UNMAP;
1232 use_16_for_ws = iscsilun->use_16_for_rw;
1233 }
Paolo Bonzinifa6252b2013-11-22 13:39:54 +01001234 }
1235
Peter Lievendbe5c582014-04-28 13:23:25 +02001236 if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
Peter Lieven9281fe92014-06-04 15:47:39 +02001237 /* WRITESAME without UNMAP is not supported by the target */
Peter Lievend4cd9612013-10-24 12:07:02 +02001238 return -ENOTSUP;
1239 }
1240
Eric Blake94d047a2016-06-01 15:10:05 -06001241 lba = offset / iscsilun->block_size;
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001242 nb_blocks = bytes / iscsilun->block_size;
Peter Lievend4cd9612013-10-24 12:07:02 +02001243
1244 if (iscsilun->zeroblock == NULL) {
Kevin Wolf4d5a3f82014-05-20 13:30:49 +02001245 iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size);
1246 if (iscsilun->zeroblock == NULL) {
1247 return -ENOMEM;
1248 }
Peter Lievend4cd9612013-10-24 12:07:02 +02001249 }
1250
Paolo Bonzinid045c462017-02-22 19:07:25 +01001251 qemu_mutex_lock(&iscsilun->mutex);
Peter Lievend4cd9612013-10-24 12:07:02 +02001252 iscsi_co_init_iscsitask(iscsilun, &iTask);
1253retry:
Peter Lieven9281fe92014-06-04 15:47:39 +02001254 if (use_16_for_ws) {
1255 iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
1256 iscsilun->zeroblock, iscsilun->block_size,
1257 nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
1258 0, 0, iscsi_co_generic_cb, &iTask);
1259 } else {
1260 iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
1261 iscsilun->zeroblock, iscsilun->block_size,
1262 nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
1263 0, 0, iscsi_co_generic_cb, &iTask);
1264 }
1265 if (iTask.task == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +01001266 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +01001267 return -ENOMEM;
Peter Lievend4cd9612013-10-24 12:07:02 +02001268 }
1269
Fam Zheng66e75c02018-06-01 17:26:45 +08001270 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lievend4cd9612013-10-24 12:07:02 +02001271
Peter Lievend9738fd2014-02-22 13:17:24 +01001272 if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
1273 iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&
Paolo Bonzini27898a52014-04-02 12:12:50 +02001274 (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE ||
1275 iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) {
Peter Lievend9738fd2014-02-22 13:17:24 +01001276 /* WRITE SAME is not supported by the target */
1277 iscsilun->has_write_same = false;
1278 scsi_free_scsi_task(iTask.task);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001279 r = -ENOTSUP;
1280 goto out_unlock;
Peter Lievend9738fd2014-02-22 13:17:24 +01001281 }
1282
Peter Lievend4cd9612013-10-24 12:07:02 +02001283 if (iTask.task != NULL) {
1284 scsi_free_scsi_task(iTask.task);
1285 iTask.task = NULL;
1286 }
1287
1288 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +01001289 iTask.complete = 0;
Peter Lievend4cd9612013-10-24 12:07:02 +02001290 goto retry;
1291 }
1292
1293 if (iTask.status != SCSI_STATUS_GOOD) {
Eric Blake04a408f2018-02-13 14:26:47 -06001294 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievene38bc232017-12-08 12:51:08 +01001295 error_report("iSCSI WRITESAME10/16 failed at lba %" PRIu64 ": %s",
1296 lba, iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001297 r = iTask.err_code;
1298 goto out_unlock;
Peter Lievend4cd9612013-10-24 12:07:02 +02001299 }
1300
Peter Lievenb03c3802014-04-28 13:11:32 +02001301 if (flags & BDRV_REQ_MAY_UNMAP) {
Eric Blake04a408f2018-02-13 14:26:47 -06001302 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievenb03c3802014-04-28 13:11:32 +02001303 } else {
Eric Blake04a408f2018-02-13 14:26:47 -06001304 iscsi_allocmap_set_allocated(iscsilun, offset, bytes);
Peter Lievenb03c3802014-04-28 13:11:32 +02001305 }
1306
Paolo Bonzinid045c462017-02-22 19:07:25 +01001307out_unlock:
1308 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +01001309 g_free(iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001310 return r;
Peter Lievend4cd9612013-10-24 12:07:02 +02001311}
1312
Kevin Wolf43171422016-12-08 14:23:07 +01001313static void apply_chap(struct iscsi_context *iscsi, QemuOpts *opts,
Paolo Bonzinif2917852014-02-17 14:43:53 +01001314 Error **errp)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001315{
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001316 const char *user = NULL;
1317 const char *password = NULL;
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001318 const char *secretid;
1319 char *secret = NULL;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001320
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001321 user = qemu_opt_get(opts, "user");
1322 if (!user) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001323 return;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001324 }
1325
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001326 secretid = qemu_opt_get(opts, "password-secret");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001327 password = qemu_opt_get(opts, "password");
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001328 if (secretid && password) {
1329 error_setg(errp, "'password' and 'password-secret' properties are "
1330 "mutually exclusive");
1331 return;
1332 }
1333 if (secretid) {
1334 secret = qcrypto_secret_lookup_as_utf8(secretid, errp);
1335 if (!secret) {
1336 return;
1337 }
1338 password = secret;
1339 } else if (!password) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001340 error_setg(errp, "CHAP username specified but no password was given");
1341 return;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001342 }
1343
1344 if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001345 error_setg(errp, "Failed to set initiator username and password");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001346 }
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001347
1348 g_free(secret);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001349}
1350
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001351static void apply_header_digest(struct iscsi_context *iscsi, QemuOpts *opts,
Paolo Bonzinif2917852014-02-17 14:43:53 +01001352 Error **errp)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001353{
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001354 const char *digest = NULL;
1355
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001356 digest = qemu_opt_get(opts, "header-digest");
1357 if (!digest) {
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001358 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001359 } else if (!strcmp(digest, "crc32c")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001360 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001361 } else if (!strcmp(digest, "none")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001362 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001363 } else if (!strcmp(digest, "crc32c-none")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001364 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001365 } else if (!strcmp(digest, "none-crc32c")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001366 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
1367 } else {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001368 error_setg(errp, "Invalid header-digest setting : %s", digest);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001369 }
1370}
1371
Kevin Wolfd4e79922016-12-08 14:23:08 +01001372static char *get_initiator_name(QemuOpts *opts)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001373{
Paolo Bonzini5accc842013-08-02 17:02:01 +02001374 const char *name;
1375 char *iscsi_name;
1376 UuidInfo *uuid_info;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001377
Kevin Wolfd4e79922016-12-08 14:23:08 +01001378 name = qemu_opt_get(opts, "initiator-name");
1379 if (name) {
1380 return g_strdup(name);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001381 }
1382
Paolo Bonzini5accc842013-08-02 17:02:01 +02001383 uuid_info = qmp_query_uuid(NULL);
1384 if (strcmp(uuid_info->UUID, UUID_NONE) == 0) {
1385 name = qemu_get_vm_name();
Paolo Bonzinif2ef4a62012-08-06 10:54:41 +02001386 } else {
Paolo Bonzini5accc842013-08-02 17:02:01 +02001387 name = uuid_info->UUID;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001388 }
Paolo Bonzini5accc842013-08-02 17:02:01 +02001389 iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
1390 name ? ":" : "", name ? name : "");
1391 qapi_free_UuidInfo(uuid_info);
1392 return iscsi_name;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001393}
1394
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001395static void iscsi_nop_timed_event(void *opaque)
1396{
1397 IscsiLun *iscsilun = opaque;
1398
Daniel Brodsky6e8a3552020-04-03 21:21:08 -07001399 QEMU_LOCK_GUARD(&iscsilun->mutex);
Peter Lieven5dd7a532015-06-16 13:45:07 +02001400 if (iscsi_get_nops_in_flight(iscsilun->iscsi) >= MAX_NOP_FAILURES) {
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001401 error_report("iSCSI: NOP timeout. Reconnecting...");
Peter Lieven5dd7a532015-06-16 13:45:07 +02001402 iscsilun->request_timed_out = true;
1403 } else if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) {
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001404 error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
Daniel Brodsky6e8a3552020-04-03 21:21:08 -07001405 return;
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001406 }
1407
Alex Blighbc72ad62013-08-21 16:03:08 +01001408 timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001409 iscsi_set_events(iscsilun);
1410}
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001411
Paolo Bonzinif2917852014-02-17 14:43:53 +01001412static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp)
Peter Lievencb1b83e2013-02-18 14:50:46 +01001413{
1414 struct scsi_task *task = NULL;
1415 struct scsi_readcapacity10 *rc10 = NULL;
1416 struct scsi_readcapacity16 *rc16 = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001417 int retries = ISCSI_CMD_RETRIES;
1418
Paolo Bonzini12888442013-05-31 13:56:24 +02001419 do {
1420 if (task != NULL) {
1421 scsi_free_scsi_task(task);
1422 task = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001423 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001424
Paolo Bonzini12888442013-05-31 13:56:24 +02001425 switch (iscsilun->type) {
1426 case TYPE_DISK:
1427 task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun);
1428 if (task != NULL && task->status == SCSI_STATUS_GOOD) {
1429 rc16 = scsi_datain_unmarshall(task);
1430 if (rc16 == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001431 error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data.");
Paolo Bonzini12888442013-05-31 13:56:24 +02001432 } else {
1433 iscsilun->block_size = rc16->block_length;
1434 iscsilun->num_blocks = rc16->returned_lba + 1;
Peter Lieven0a386e42015-04-16 16:08:26 +02001435 iscsilun->lbpme = !!rc16->lbpme;
1436 iscsilun->lbprz = !!rc16->lbprz;
Peter Lieven9281fe92014-06-04 15:47:39 +02001437 iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff);
Paolo Bonzini12888442013-05-31 13:56:24 +02001438 }
Zhu Lingshan1cb6d132015-12-29 11:32:14 +08001439 break;
Paolo Bonzini12888442013-05-31 13:56:24 +02001440 }
Zhu Lingshan1cb6d132015-12-29 11:32:14 +08001441 if (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
1442 && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) {
1443 break;
1444 }
1445 /* Fall through and try READ CAPACITY(10) instead. */
Paolo Bonzini12888442013-05-31 13:56:24 +02001446 case TYPE_ROM:
1447 task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0);
1448 if (task != NULL && task->status == SCSI_STATUS_GOOD) {
1449 rc10 = scsi_datain_unmarshall(task);
1450 if (rc10 == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001451 error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data.");
Paolo Bonzini12888442013-05-31 13:56:24 +02001452 } else {
1453 iscsilun->block_size = rc10->block_size;
1454 if (rc10->lba == 0) {
1455 /* blank disk loaded */
1456 iscsilun->num_blocks = 0;
1457 } else {
1458 iscsilun->num_blocks = rc10->lba + 1;
1459 }
1460 }
1461 }
1462 break;
1463 default:
Paolo Bonzinif2917852014-02-17 14:43:53 +01001464 return;
Paolo Bonzini12888442013-05-31 13:56:24 +02001465 }
1466 } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
1467 && task->sense.key == SCSI_SENSE_UNIT_ATTENTION
1468 && retries-- > 0);
1469
1470 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
Zhu Lingshan240125b2015-12-16 12:40:40 +08001471 error_setg(errp, "iSCSI: failed to send readcapacity10/16 command");
Peter Lieven6d1f2522015-08-14 13:33:36 +02001472 } else if (!iscsilun->block_size ||
1473 iscsilun->block_size % BDRV_SECTOR_SIZE) {
1474 error_setg(errp, "iSCSI: the target returned an invalid "
1475 "block size of %d.", iscsilun->block_size);
Paolo Bonzini12888442013-05-31 13:56:24 +02001476 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001477 if (task) {
1478 scsi_free_scsi_task(task);
1479 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001480}
1481
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001482static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun,
Peter Lieven24d3bd62014-02-17 18:34:08 +01001483 int evpd, int pc, void **inq, Error **errp)
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001484{
1485 int full_size;
1486 struct scsi_task *task = NULL;
1487 task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
1488 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
1489 goto fail;
1490 }
1491 full_size = scsi_datain_getfullsize(task);
1492 if (full_size > task->datain.size) {
1493 scsi_free_scsi_task(task);
1494
1495 /* we need more data for the full list */
1496 task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size);
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001497 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
1498 goto fail;
1499 }
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001500 }
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001501
Peter Lieven24d3bd62014-02-17 18:34:08 +01001502 *inq = scsi_datain_unmarshall(task);
1503 if (*inq == NULL) {
1504 error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob");
Markus Armbruster172fc4d2014-04-25 16:50:35 +02001505 goto fail_with_err;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001506 }
1507
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001508 return task;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001509
1510fail:
Markus Armbruster172fc4d2014-04-25 16:50:35 +02001511 error_setg(errp, "iSCSI: Inquiry command failed : %s",
1512 iscsi_get_error(iscsi));
1513fail_with_err:
Peter Lieven24d3bd62014-02-17 18:34:08 +01001514 if (task != NULL) {
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001515 scsi_free_scsi_task(task);
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001516 }
1517 return NULL;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001518}
1519
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001520static void iscsi_detach_aio_context(BlockDriverState *bs)
1521{
1522 IscsiLun *iscsilun = bs->opaque;
1523
Fam Zhengdca21ef2015-10-23 11:08:05 +08001524 aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsilun->iscsi),
Stefan Hajnoczif6a51c82016-12-01 19:26:41 +00001525 false, NULL, NULL, NULL, NULL);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001526 iscsilun->events = 0;
1527
1528 if (iscsilun->nop_timer) {
1529 timer_del(iscsilun->nop_timer);
1530 timer_free(iscsilun->nop_timer);
1531 iscsilun->nop_timer = NULL;
1532 }
Peter Lieven05b685f2015-04-07 22:08:15 +02001533 if (iscsilun->event_timer) {
1534 timer_del(iscsilun->event_timer);
1535 timer_free(iscsilun->event_timer);
1536 iscsilun->event_timer = NULL;
1537 }
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001538}
1539
1540static void iscsi_attach_aio_context(BlockDriverState *bs,
1541 AioContext *new_context)
1542{
1543 IscsiLun *iscsilun = bs->opaque;
1544
1545 iscsilun->aio_context = new_context;
1546 iscsi_set_events(iscsilun);
1547
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001548 /* Set up a timer for sending out iSCSI NOPs */
1549 iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context,
1550 QEMU_CLOCK_REALTIME, SCALE_MS,
1551 iscsi_nop_timed_event, iscsilun);
1552 timer_mod(iscsilun->nop_timer,
1553 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
Peter Lieven05b685f2015-04-07 22:08:15 +02001554
Peter Lieven5dd7a532015-06-16 13:45:07 +02001555 /* Set up a timer for periodic calls to iscsi_set_events and to
1556 * scan for command timeout */
Peter Lieven05b685f2015-04-07 22:08:15 +02001557 iscsilun->event_timer = aio_timer_new(iscsilun->aio_context,
1558 QEMU_CLOCK_REALTIME, SCALE_MS,
Peter Lieven5dd7a532015-06-16 13:45:07 +02001559 iscsi_timed_check_events, iscsilun);
1560 timer_mod(iscsilun->event_timer,
1561 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001562}
1563
Peter Lieven7191f202015-04-16 16:08:27 +02001564static void iscsi_modesense_sync(IscsiLun *iscsilun)
Fam Zhengc1d40962014-10-30 19:23:46 +08001565{
1566 struct scsi_task *task;
1567 struct scsi_mode_sense *ms = NULL;
Peter Lieven7191f202015-04-16 16:08:27 +02001568 iscsilun->write_protected = false;
Peter Lieven752ce452015-04-16 16:08:28 +02001569 iscsilun->dpofua = false;
Fam Zhengc1d40962014-10-30 19:23:46 +08001570
1571 task = iscsi_modesense6_sync(iscsilun->iscsi, iscsilun->lun,
1572 1, SCSI_MODESENSE_PC_CURRENT,
1573 0x3F, 0, 255);
1574 if (task == NULL) {
1575 error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s",
1576 iscsi_get_error(iscsilun->iscsi));
1577 goto out;
1578 }
1579
1580 if (task->status != SCSI_STATUS_GOOD) {
1581 error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable");
1582 goto out;
1583 }
1584 ms = scsi_datain_unmarshall(task);
1585 if (!ms) {
1586 error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s",
1587 iscsi_get_error(iscsilun->iscsi));
1588 goto out;
1589 }
Peter Lieven7191f202015-04-16 16:08:27 +02001590 iscsilun->write_protected = ms->device_specific_parameter & 0x80;
Peter Lieven752ce452015-04-16 16:08:28 +02001591 iscsilun->dpofua = ms->device_specific_parameter & 0x10;
Fam Zhengc1d40962014-10-30 19:23:46 +08001592
1593out:
1594 if (task) {
1595 scsi_free_scsi_task(task);
1596 }
Fam Zhengc1d40962014-10-30 19:23:46 +08001597}
1598
Kevin Wolf43171422016-12-08 14:23:07 +01001599static void iscsi_parse_iscsi_option(const char *target, QDict *options)
1600{
1601 QemuOptsList *list;
1602 QemuOpts *opts;
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001603 const char *user, *password, *password_secret, *initiator_name,
Kevin Wolf1d560102016-12-08 14:23:10 +01001604 *header_digest, *timeout;
Kevin Wolf43171422016-12-08 14:23:07 +01001605
1606 list = qemu_find_opts("iscsi");
1607 if (!list) {
1608 return;
1609 }
1610
1611 opts = qemu_opts_find(list, target);
1612 if (opts == NULL) {
1613 opts = QTAILQ_FIRST(&list->head);
1614 if (!opts) {
1615 return;
1616 }
1617 }
1618
1619 user = qemu_opt_get(opts, "user");
1620 if (user) {
1621 qdict_set_default_str(options, "user", user);
1622 }
1623
1624 password = qemu_opt_get(opts, "password");
1625 if (password) {
1626 qdict_set_default_str(options, "password", password);
1627 }
1628
1629 password_secret = qemu_opt_get(opts, "password-secret");
1630 if (password_secret) {
1631 qdict_set_default_str(options, "password-secret", password_secret);
1632 }
Kevin Wolfd4e79922016-12-08 14:23:08 +01001633
1634 initiator_name = qemu_opt_get(opts, "initiator-name");
1635 if (initiator_name) {
1636 qdict_set_default_str(options, "initiator-name", initiator_name);
1637 }
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001638
1639 header_digest = qemu_opt_get(opts, "header-digest");
1640 if (header_digest) {
Kevin Wolf31eb1202016-12-08 14:23:11 +01001641 /* -iscsi takes upper case values, but QAPI only supports lower case
1642 * enum constant names, so we have to convert here. */
1643 char *qapi_value = g_ascii_strdown(header_digest, -1);
1644 qdict_set_default_str(options, "header-digest", qapi_value);
1645 g_free(qapi_value);
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001646 }
Kevin Wolf1d560102016-12-08 14:23:10 +01001647
1648 timeout = qemu_opt_get(opts, "timeout");
1649 if (timeout) {
1650 qdict_set_default_str(options, "timeout", timeout);
1651 }
Kevin Wolf43171422016-12-08 14:23:07 +01001652}
1653
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001654/*
1655 * We support iscsi url's on the form
1656 * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
1657 */
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001658static void iscsi_parse_filename(const char *filename, QDict *options,
1659 Error **errp)
1660{
1661 struct iscsi_url *iscsi_url;
1662 const char *transport_name;
1663 char *lun_str;
1664
1665 iscsi_url = iscsi_parse_full_url(NULL, filename);
1666 if (iscsi_url == NULL) {
1667 error_setg(errp, "Failed to parse URL : %s", filename);
1668 return;
1669 }
1670
1671#if LIBISCSI_API_VERSION >= (20160603)
1672 switch (iscsi_url->transport) {
1673 case TCP_TRANSPORT:
1674 transport_name = "tcp";
1675 break;
1676 case ISER_TRANSPORT:
1677 transport_name = "iser";
1678 break;
1679 default:
1680 error_setg(errp, "Unknown transport type (%d)",
1681 iscsi_url->transport);
1682 return;
1683 }
1684#else
1685 transport_name = "tcp";
1686#endif
1687
1688 qdict_set_default_str(options, "transport", transport_name);
1689 qdict_set_default_str(options, "portal", iscsi_url->portal);
1690 qdict_set_default_str(options, "target", iscsi_url->target);
1691
1692 lun_str = g_strdup_printf("%d", iscsi_url->lun);
1693 qdict_set_default_str(options, "lun", lun_str);
1694 g_free(lun_str);
1695
Kevin Wolf43171422016-12-08 14:23:07 +01001696 /* User/password from -iscsi take precedence over those from the URL */
1697 iscsi_parse_iscsi_option(iscsi_url->target, options);
1698
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001699 if (iscsi_url->user[0] != '\0') {
1700 qdict_set_default_str(options, "user", iscsi_url->user);
1701 qdict_set_default_str(options, "password", iscsi_url->passwd);
1702 }
1703
1704 iscsi_destroy_url(iscsi_url);
1705}
1706
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001707static QemuOptsList runtime_opts = {
1708 .name = "iscsi",
1709 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
1710 .desc = {
1711 {
1712 .name = "transport",
1713 .type = QEMU_OPT_STRING,
1714 },
1715 {
1716 .name = "portal",
1717 .type = QEMU_OPT_STRING,
1718 },
1719 {
1720 .name = "target",
1721 .type = QEMU_OPT_STRING,
1722 },
1723 {
1724 .name = "user",
1725 .type = QEMU_OPT_STRING,
1726 },
1727 {
1728 .name = "password",
1729 .type = QEMU_OPT_STRING,
1730 },
1731 {
Kevin Wolf43171422016-12-08 14:23:07 +01001732 .name = "password-secret",
1733 .type = QEMU_OPT_STRING,
1734 },
1735 {
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001736 .name = "lun",
1737 .type = QEMU_OPT_NUMBER,
1738 },
Kevin Wolfd4e79922016-12-08 14:23:08 +01001739 {
1740 .name = "initiator-name",
1741 .type = QEMU_OPT_STRING,
1742 },
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001743 {
1744 .name = "header-digest",
1745 .type = QEMU_OPT_STRING,
1746 },
Kevin Wolf1d560102016-12-08 14:23:10 +01001747 {
1748 .name = "timeout",
1749 .type = QEMU_OPT_NUMBER,
1750 },
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001751 { /* end of list */ }
1752 },
1753};
1754
Fam Zhengcc9743c2018-06-01 17:26:44 +08001755static void iscsi_save_designator(IscsiLun *lun,
1756 struct scsi_inquiry_device_identification *inq_di)
1757{
1758 struct scsi_inquiry_device_designator *desig, *copy = NULL;
1759
1760 for (desig = inq_di->designators; desig; desig = desig->next) {
1761 if (desig->association ||
1762 desig->designator_type > SCSI_DESIGNATOR_TYPE_NAA) {
1763 continue;
1764 }
1765 /* NAA works better than T10 vendor ID based designator. */
1766 if (!copy || copy->designator_type < desig->designator_type) {
1767 copy = desig;
1768 }
1769 }
1770 if (copy) {
1771 lun->dd = g_new(struct scsi_inquiry_device_designator, 1);
1772 *lun->dd = *copy;
1773 lun->dd->next = NULL;
1774 lun->dd->designator = g_malloc(copy->designator_length);
1775 memcpy(lun->dd->designator, copy->designator, copy->designator_length);
1776 }
1777}
1778
Max Reitz015a1032013-09-05 14:22:29 +02001779static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
1780 Error **errp)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001781{
1782 IscsiLun *iscsilun = bs->opaque;
1783 struct iscsi_context *iscsi = NULL;
Peter Lievene829b0b2012-11-17 14:37:39 +01001784 struct scsi_task *task = NULL;
1785 struct scsi_inquiry_standard *inq = NULL;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001786 struct scsi_inquiry_supported_pages *inq_vpd;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001787 char *initiator_name = NULL;
Kevin Wolf60beb342013-04-12 17:59:59 +02001788 QemuOpts *opts;
1789 Error *local_err = NULL;
Markus Armbrusterdeadbb82018-06-14 21:14:27 +02001790 const char *transport_name, *portal, *target;
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001791#if LIBISCSI_API_VERSION >= (20160603)
1792 enum iscsi_transport_type transport;
1793#endif
1794 int i, ret = 0, timeout = 0, lun;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001795
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08001796 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
Markus Armbrusteraf175e82020-07-07 18:06:03 +02001797 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
Kevin Wolf60beb342013-04-12 17:59:59 +02001798 ret = -EINVAL;
1799 goto out;
1800 }
1801
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001802 transport_name = qemu_opt_get(opts, "transport");
1803 portal = qemu_opt_get(opts, "portal");
1804 target = qemu_opt_get(opts, "target");
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001805 lun = qemu_opt_get_number(opts, "lun", 0);
Kevin Wolf60beb342013-04-12 17:59:59 +02001806
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001807 if (!transport_name || !portal || !target) {
1808 error_setg(errp, "Need all of transport, portal and target options");
1809 ret = -EINVAL;
1810 goto out;
1811 }
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001812
1813 if (!strcmp(transport_name, "tcp")) {
1814#if LIBISCSI_API_VERSION >= (20160603)
1815 transport = TCP_TRANSPORT;
1816 } else if (!strcmp(transport_name, "iser")) {
1817 transport = ISER_TRANSPORT;
1818#else
1819 /* TCP is what older libiscsi versions always use */
1820#endif
1821 } else {
1822 error_setg(errp, "Unknown transport: %s", transport_name);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001823 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001824 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001825 }
1826
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001827 memset(iscsilun, 0, sizeof(IscsiLun));
1828
Kevin Wolfd4e79922016-12-08 14:23:08 +01001829 initiator_name = get_initiator_name(opts);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001830
1831 iscsi = iscsi_create_context(initiator_name);
1832 if (iscsi == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001833 error_setg(errp, "iSCSI: Failed to create iSCSI context.");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001834 ret = -ENOMEM;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001835 goto out;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001836 }
Roy Shtermane0ae4982016-10-09 11:14:56 +03001837#if LIBISCSI_API_VERSION >= (20160603)
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001838 if (iscsi_init_transport(iscsi, transport)) {
Roy Shtermane0ae4982016-10-09 11:14:56 +03001839 error_setg(errp, ("Error initializing transport."));
1840 ret = -EINVAL;
1841 goto out;
1842 }
1843#endif
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001844 if (iscsi_set_targetname(iscsi, target)) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001845 error_setg(errp, "iSCSI: Failed to set target name.");
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001846 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001847 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001848 }
1849
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001850 /* check if we got CHAP username/password via the options */
Kevin Wolf43171422016-12-08 14:23:07 +01001851 apply_chap(iscsi, opts, &local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01001852 if (local_err != NULL) {
1853 error_propagate(errp, local_err);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001854 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001855 goto out;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001856 }
1857
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001858 if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001859 error_setg(errp, "iSCSI: Failed to set session type to normal.");
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001860 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001861 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001862 }
1863
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001864 /* check if we got HEADER_DIGEST via the options */
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001865 apply_header_digest(iscsi, opts, &local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01001866 if (local_err != NULL) {
1867 error_propagate(errp, local_err);
1868 ret = -EINVAL;
1869 goto out;
1870 }
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001871
Peter Lieven90497362015-06-26 12:18:01 +02001872 /* timeout handling is broken in libiscsi before 1.15.0 */
Kevin Wolf1d560102016-12-08 14:23:10 +01001873 timeout = qemu_opt_get_number(opts, "timeout", 0);
Roy Shterman583ec222016-10-09 11:14:55 +03001874#if LIBISCSI_API_VERSION >= 20150621
Peter Lieven90497362015-06-26 12:18:01 +02001875 iscsi_set_timeout(iscsi, timeout);
1876#else
1877 if (timeout) {
Markus Armbruster5197f442018-10-17 10:26:27 +02001878 warn_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
Peter Lieven90497362015-06-26 12:18:01 +02001879 }
1880#endif
Peter Lieven5dd7a532015-06-16 13:45:07 +02001881
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001882 if (iscsi_full_connect_sync(iscsi, portal, lun) != 0) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001883 error_setg(errp, "iSCSI: Failed to connect to LUN : %s",
Peter Lievene829b0b2012-11-17 14:37:39 +01001884 iscsi_get_error(iscsi));
1885 ret = -EINVAL;
1886 goto out;
1887 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001888
1889 iscsilun->iscsi = iscsi;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001890 iscsilun->aio_context = bdrv_get_aio_context(bs);
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001891 iscsilun->lun = lun;
Paolo Bonzinifa6252b2013-11-22 13:39:54 +01001892 iscsilun->has_write_same = true;
Peter Lievene829b0b2012-11-17 14:37:39 +01001893
Peter Lieven24d3bd62014-02-17 18:34:08 +01001894 task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0,
1895 (void **) &inq, errp);
1896 if (task == NULL) {
1897 ret = -EINVAL;
1898 goto out;
1899 }
1900 iscsilun->type = inq->periperal_device_type;
1901 scsi_free_scsi_task(task);
1902 task = NULL;
1903
Peter Lieven7191f202015-04-16 16:08:27 +02001904 iscsi_modesense_sync(iscsilun);
Eric Blake4df863f2016-05-03 16:39:06 -06001905 if (iscsilun->dpofua) {
1906 bs->supported_write_flags = BDRV_REQ_FUA;
1907 }
Peter Lieven7191f202015-04-16 16:08:27 +02001908
Fam Zhengc1d40962014-10-30 19:23:46 +08001909 /* Check the write protect flag of the LUN if we want to write */
1910 if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) &&
Fam Zheng43ae8fb2015-02-25 12:40:08 +08001911 iscsilun->write_protected) {
Kevin Wolf8f3bf502018-10-08 17:27:18 +02001912 ret = bdrv_apply_auto_read_only(bs, "LUN is write protected", errp);
1913 if (ret < 0) {
1914 goto out;
1915 }
1916 flags &= ~BDRV_O_RDWR;
Fam Zhengc1d40962014-10-30 19:23:46 +08001917 }
1918
Paolo Bonzinif2917852014-02-17 14:43:53 +01001919 iscsi_readcapacity_sync(iscsilun, &local_err);
1920 if (local_err != NULL) {
1921 error_propagate(errp, local_err);
Fam Zhengcd82b6f2014-04-10 09:33:55 +08001922 ret = -EINVAL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001923 goto out;
Peter Lievene829b0b2012-11-17 14:37:39 +01001924 }
Peter Lieven0777b5d2013-07-11 14:16:25 +02001925 bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun);
Peter Lievene829b0b2012-11-17 14:37:39 +01001926
Kevin Wolff47c3f52014-03-05 15:45:00 +01001927 /* We don't have any emulation for devices other than disks and CD-ROMs, so
1928 * this must be sg ioctl compatible. We force it to be sg, otherwise qemu
1929 * will try to read from the device to guess the image format.
Ronnie Sahlberg622695a2012-05-26 14:56:41 +10001930 */
Kevin Wolff47c3f52014-03-05 15:45:00 +01001931 if (iscsilun->type != TYPE_DISK && iscsilun->type != TYPE_ROM) {
Eric Blake54115412016-06-23 16:37:26 -06001932 bs->sg = true;
Ronnie Sahlberg622695a2012-05-26 14:56:41 +10001933 }
1934
Peter Lieven24d3bd62014-02-17 18:34:08 +01001935 task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1936 SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES,
1937 (void **) &inq_vpd, errp);
1938 if (task == NULL) {
1939 ret = -EINVAL;
1940 goto out;
1941 }
1942 for (i = 0; i < inq_vpd->num_pages; i++) {
1943 struct scsi_task *inq_task;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001944 struct scsi_inquiry_logical_block_provisioning *inq_lbp;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001945 struct scsi_inquiry_block_limits *inq_bl;
Fam Zhengcc9743c2018-06-01 17:26:44 +08001946 struct scsi_inquiry_device_identification *inq_di;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001947 switch (inq_vpd->pages[i]) {
1948 case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
1949 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1950 SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING,
1951 (void **) &inq_lbp, errp);
1952 if (inq_task == NULL) {
1953 ret = -EINVAL;
1954 goto out;
1955 }
1956 memcpy(&iscsilun->lbp, inq_lbp,
1957 sizeof(struct scsi_inquiry_logical_block_provisioning));
1958 scsi_free_scsi_task(inq_task);
1959 break;
1960 case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS:
1961 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1962 SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS,
1963 (void **) &inq_bl, errp);
1964 if (inq_task == NULL) {
1965 ret = -EINVAL;
1966 goto out;
1967 }
1968 memcpy(&iscsilun->bl, inq_bl,
1969 sizeof(struct scsi_inquiry_block_limits));
1970 scsi_free_scsi_task(inq_task);
1971 break;
Fam Zhengcc9743c2018-06-01 17:26:44 +08001972 case SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION:
1973 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1974 SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION,
1975 (void **) &inq_di, errp);
1976 if (inq_task == NULL) {
1977 ret = -EINVAL;
1978 goto out;
1979 }
1980 iscsi_save_designator(iscsilun, inq_di);
1981 scsi_free_scsi_task(inq_task);
1982 break;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001983 default:
1984 break;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001985 }
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001986 }
Peter Lieven24d3bd62014-02-17 18:34:08 +01001987 scsi_free_scsi_task(task);
1988 task = NULL;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001989
Paolo Bonzinid045c462017-02-22 19:07:25 +01001990 qemu_mutex_init(&iscsilun->mutex);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001991 iscsi_attach_aio_context(bs, iscsilun->aio_context);
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001992
Peter Lievenb03c3802014-04-28 13:11:32 +02001993 /* Guess the internal cluster (page) size of the iscsi target by the means
1994 * of opt_unmap_gran. Transfer the unmap granularity only if it has a
1995 * reasonable size */
Peter Lieven3d2acaa2014-04-28 17:18:32 +02001996 if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 &&
Peter Lievenb03c3802014-04-28 13:11:32 +02001997 iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) {
Eric Blakeba059e72018-02-13 14:26:46 -06001998 iscsilun->cluster_size = iscsilun->bl.opt_unmap_gran *
1999 iscsilun->block_size;
Peter Lieven9eac3622015-04-16 16:08:33 +02002000 if (iscsilun->lbprz) {
Chen Qun34afc5c2020-03-11 11:29:27 +08002001 ret = iscsi_allocmap_init(iscsilun, flags);
Peter Lievenb03c3802014-04-28 13:11:32 +02002002 }
Peter Lievenb03c3802014-04-28 13:11:32 +02002003 }
2004
Eric Blakee24d8132018-01-26 13:34:39 -06002005 if (iscsilun->lbprz && iscsilun->lbp.lbpws) {
2006 bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
2007 }
2008
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002009out:
Kevin Wolf60beb342013-04-12 17:59:59 +02002010 qemu_opts_del(opts);
Markus Armbrusterf7047c22014-06-06 18:25:12 +02002011 g_free(initiator_name);
Peter Lievene829b0b2012-11-17 14:37:39 +01002012 if (task != NULL) {
2013 scsi_free_scsi_task(task);
2014 }
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002015
2016 if (ret) {
2017 if (iscsi != NULL) {
Peter Lieven20474e92015-04-16 16:08:25 +02002018 if (iscsi_is_logged_in(iscsi)) {
2019 iscsi_logout_sync(iscsi);
2020 }
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002021 iscsi_destroy_context(iscsi);
2022 }
2023 memset(iscsilun, 0, sizeof(IscsiLun));
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002024 }
Markus Armbrusterdeadbb82018-06-14 21:14:27 +02002025
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002026 return ret;
2027}
2028
2029static void iscsi_close(BlockDriverState *bs)
2030{
2031 IscsiLun *iscsilun = bs->opaque;
2032 struct iscsi_context *iscsi = iscsilun->iscsi;
2033
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02002034 iscsi_detach_aio_context(bs);
Peter Lieven20474e92015-04-16 16:08:25 +02002035 if (iscsi_is_logged_in(iscsi)) {
2036 iscsi_logout_sync(iscsi);
2037 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002038 iscsi_destroy_context(iscsi);
Fam Zhengcc9743c2018-06-01 17:26:44 +08002039 if (iscsilun->dd) {
2040 g_free(iscsilun->dd->designator);
2041 g_free(iscsilun->dd);
2042 }
Peter Lievend4cd9612013-10-24 12:07:02 +02002043 g_free(iscsilun->zeroblock);
Peter Lievene1123a32016-07-18 10:52:20 +02002044 iscsi_allocmap_free(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +01002045 qemu_mutex_destroy(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002046 memset(iscsilun, 0, sizeof(IscsiLun));
2047}
2048
Kevin Wolf3baca892014-07-16 17:48:16 +02002049static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
Kevin Wolfd34682c2013-12-11 19:26:16 +01002050{
Kevin Wolfd34682c2013-12-11 19:26:16 +01002051 /* We don't actually refresh here, but just return data queried in
2052 * iscsi_open(): iscsi targets don't change their limits. */
Peter Lieven52f6fa12014-10-27 10:18:45 +01002053
2054 IscsiLun *iscsilun = bs->opaque;
Eric Blake5def6b82016-06-23 16:37:19 -06002055 uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff;
Eric Blake95eaa782016-09-07 16:27:20 -05002056 unsigned int block_size = MAX(BDRV_SECTOR_SIZE, iscsilun->block_size);
Peter Lieven52f6fa12014-10-27 10:18:45 +01002057
Eric Blake95eaa782016-09-07 16:27:20 -05002058 assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bs->sg);
2059
2060 bs->bl.request_alignment = block_size;
Eric Blakec8b3b992016-06-23 16:37:14 -06002061
Peter Lieven52f6fa12014-10-27 10:18:45 +01002062 if (iscsilun->bl.max_xfer_len) {
2063 max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len);
2064 }
2065
Eric Blake95eaa782016-09-07 16:27:20 -05002066 if (max_xfer_len * block_size < INT_MAX) {
Eric Blake5def6b82016-06-23 16:37:19 -06002067 bs->bl.max_transfer = max_xfer_len * iscsilun->block_size;
2068 }
Peter Lieven52f6fa12014-10-27 10:18:45 +01002069
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002070 if (iscsilun->lbp.lbpu) {
Eric Blake95eaa782016-09-07 16:27:20 -05002071 if (iscsilun->bl.max_unmap < 0xffffffff / block_size) {
Eric Blakeb9f78552016-06-23 16:37:21 -06002072 bs->bl.max_pdiscard =
2073 iscsilun->bl.max_unmap * iscsilun->block_size;
Kevin Wolfd34682c2013-12-11 19:26:16 +01002074 }
Eric Blakeb9f78552016-06-23 16:37:21 -06002075 bs->bl.pdiscard_alignment =
2076 iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
Eric Blake8b184742016-06-01 15:10:01 -06002077 } else {
Eric Blakeb9f78552016-06-23 16:37:21 -06002078 bs->bl.pdiscard_alignment = iscsilun->block_size;
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002079 }
Kevin Wolfd34682c2013-12-11 19:26:16 +01002080
Eric Blake95eaa782016-09-07 16:27:20 -05002081 if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) {
Eric Blakecf081fc2016-06-01 15:10:02 -06002082 bs->bl.max_pwrite_zeroes =
2083 iscsilun->bl.max_ws_len * iscsilun->block_size;
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002084 }
2085 if (iscsilun->lbp.lbpws) {
Eric Blakecf081fc2016-06-01 15:10:02 -06002086 bs->bl.pwrite_zeroes_alignment =
2087 iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
Eric Blake8b184742016-06-01 15:10:01 -06002088 } else {
Eric Blakecf081fc2016-06-01 15:10:02 -06002089 bs->bl.pwrite_zeroes_alignment = iscsilun->block_size;
Kevin Wolfd34682c2013-12-11 19:26:16 +01002090 }
Eric Blake5def6b82016-06-23 16:37:19 -06002091 if (iscsilun->bl.opt_xfer_len &&
Eric Blake95eaa782016-09-07 16:27:20 -05002092 iscsilun->bl.opt_xfer_len < INT_MAX / block_size) {
Eric Blake5def6b82016-06-23 16:37:19 -06002093 bs->bl.opt_transfer = pow2floor(iscsilun->bl.opt_xfer_len *
2094 iscsilun->block_size);
2095 }
Anthony Liguorie9f526a2014-01-24 15:50:14 -08002096}
Kevin Wolfd34682c2013-12-11 19:26:16 +01002097
Fam Zheng43ae8fb2015-02-25 12:40:08 +08002098/* Note that this will not re-establish a connection with an iSCSI target - it
2099 * is effectively a NOP. */
Jeff Codydc6afb92014-01-14 13:10:24 -05002100static int iscsi_reopen_prepare(BDRVReopenState *state,
2101 BlockReopenQueue *queue, Error **errp)
2102{
Fam Zheng43ae8fb2015-02-25 12:40:08 +08002103 IscsiLun *iscsilun = state->bs->opaque;
2104
2105 if (state->flags & BDRV_O_RDWR && iscsilun->write_protected) {
2106 error_setg(errp, "Cannot open a write protected LUN as read-write");
2107 return -EACCES;
2108 }
Kevin Wolfd34682c2013-12-11 19:26:16 +01002109 return 0;
2110}
2111
Peter Lievene1123a32016-07-18 10:52:20 +02002112static void iscsi_reopen_commit(BDRVReopenState *reopen_state)
2113{
2114 IscsiLun *iscsilun = reopen_state->bs->opaque;
2115
2116 /* the cache.direct status might have changed */
2117 if (iscsilun->allocmap != NULL) {
2118 iscsi_allocmap_init(iscsilun, reopen_state->flags);
2119 }
2120}
2121
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002122static int coroutine_fn iscsi_co_truncate(BlockDriverState *bs, int64_t offset,
Max Reitzc80d8b02019-09-18 11:51:40 +02002123 bool exact, PreallocMode prealloc,
Kevin Wolf92b92792020-04-24 14:54:39 +02002124 BdrvRequestFlags flags, Error **errp)
Peter Lievencb1b83e2013-02-18 14:50:46 +01002125{
2126 IscsiLun *iscsilun = bs->opaque;
Max Reitz82325ae2019-09-18 11:51:41 +02002127 int64_t cur_length;
Paolo Bonzinif2917852014-02-17 14:43:53 +01002128 Error *local_err = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01002129
Max Reitz8243ccb2017-06-13 22:20:52 +02002130 if (prealloc != PREALLOC_MODE_OFF) {
2131 error_setg(errp, "Unsupported preallocation mode '%s'",
Markus Armbruster977c7362017-08-24 10:46:08 +02002132 PreallocMode_str(prealloc));
Max Reitz8243ccb2017-06-13 22:20:52 +02002133 return -ENOTSUP;
2134 }
2135
Peter Lievencb1b83e2013-02-18 14:50:46 +01002136 if (iscsilun->type != TYPE_DISK) {
Max Reitzf59adb32017-03-28 22:51:29 +02002137 error_setg(errp, "Cannot resize non-disk iSCSI devices");
Peter Lievencb1b83e2013-02-18 14:50:46 +01002138 return -ENOTSUP;
2139 }
2140
Paolo Bonzinif2917852014-02-17 14:43:53 +01002141 iscsi_readcapacity_sync(iscsilun, &local_err);
2142 if (local_err != NULL) {
Max Reitz4bff28b2017-03-28 22:51:28 +02002143 error_propagate(errp, local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01002144 return -EIO;
Peter Lievencb1b83e2013-02-18 14:50:46 +01002145 }
2146
Max Reitz82325ae2019-09-18 11:51:41 +02002147 cur_length = iscsi_getlength(bs);
2148 if (offset != cur_length && exact) {
2149 error_setg(errp, "Cannot resize iSCSI devices");
2150 return -ENOTSUP;
2151 } else if (offset > cur_length) {
Max Reitzf59adb32017-03-28 22:51:29 +02002152 error_setg(errp, "Cannot grow iSCSI devices");
Peter Lievencb1b83e2013-02-18 14:50:46 +01002153 return -EINVAL;
2154 }
2155
Peter Lievene1123a32016-07-18 10:52:20 +02002156 if (iscsilun->allocmap != NULL) {
2157 iscsi_allocmap_init(iscsilun, bs->open_flags);
Peter Lievenb03c3802014-04-28 13:11:32 +02002158 }
2159
Peter Lievencb1b83e2013-02-18 14:50:46 +01002160 return 0;
2161}
2162
Peter Lieven186d4f22013-10-24 12:06:55 +02002163static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
2164{
2165 IscsiLun *iscsilun = bs->opaque;
Eric Blakeba059e72018-02-13 14:26:46 -06002166 bdi->cluster_size = iscsilun->cluster_size;
Peter Lieven186d4f22013-10-24 12:06:55 +02002167 return 0;
2168}
2169
Paolo Bonzini2b148f32018-03-01 17:36:18 +01002170static void coroutine_fn iscsi_co_invalidate_cache(BlockDriverState *bs,
2171 Error **errp)
Peter Lievene1123a32016-07-18 10:52:20 +02002172{
2173 IscsiLun *iscsilun = bs->opaque;
2174 iscsi_allocmap_invalidate(iscsilun);
2175}
2176
Fam Zheng604dfaa2018-06-01 17:26:46 +08002177static int coroutine_fn iscsi_co_copy_range_from(BlockDriverState *bs,
2178 BdrvChild *src,
2179 uint64_t src_offset,
2180 BdrvChild *dst,
2181 uint64_t dst_offset,
2182 uint64_t bytes,
Vladimir Sementsov-Ogievskiy67b51fb2018-07-09 19:37:17 +03002183 BdrvRequestFlags read_flags,
2184 BdrvRequestFlags write_flags)
Fam Zheng604dfaa2018-06-01 17:26:46 +08002185{
Vladimir Sementsov-Ogievskiy67b51fb2018-07-09 19:37:17 +03002186 return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes,
2187 read_flags, write_flags);
Fam Zheng604dfaa2018-06-01 17:26:46 +08002188}
2189
2190static struct scsi_task *iscsi_xcopy_task(int param_len)
2191{
2192 struct scsi_task *task;
2193
2194 task = g_new0(struct scsi_task, 1);
2195
2196 task->cdb[0] = EXTENDED_COPY;
2197 task->cdb[10] = (param_len >> 24) & 0xFF;
2198 task->cdb[11] = (param_len >> 16) & 0xFF;
2199 task->cdb[12] = (param_len >> 8) & 0xFF;
2200 task->cdb[13] = param_len & 0xFF;
2201 task->cdb_size = 16;
2202 task->xfer_dir = SCSI_XFER_WRITE;
2203 task->expxferlen = param_len;
2204
2205 return task;
2206}
2207
2208static void iscsi_populate_target_desc(unsigned char *desc, IscsiLun *lun)
2209{
2210 struct scsi_inquiry_device_designator *dd = lun->dd;
2211
2212 memset(desc, 0, 32);
2213 desc[0] = 0xE4; /* IDENT_DESCR_TGT_DESCR */
2214 desc[4] = dd->code_set;
2215 desc[5] = (dd->designator_type & 0xF)
2216 | ((dd->association & 3) << 4);
2217 desc[7] = dd->designator_length;
Fam Zheng1439b9c2018-06-29 14:03:27 +08002218 memcpy(desc + 8, dd->designator, MIN(dd->designator_length, 20));
Fam Zheng604dfaa2018-06-01 17:26:46 +08002219
2220 desc[28] = 0;
2221 desc[29] = (lun->block_size >> 16) & 0xFF;
2222 desc[30] = (lun->block_size >> 8) & 0xFF;
2223 desc[31] = lun->block_size & 0xFF;
2224}
2225
2226static void iscsi_xcopy_desc_hdr(uint8_t *hdr, int dc, int cat, int src_index,
2227 int dst_index)
2228{
2229 hdr[0] = 0x02; /* BLK_TO_BLK_SEG_DESCR */
2230 hdr[1] = ((dc << 1) | cat) & 0xFF;
2231 hdr[2] = (XCOPY_BLK2BLK_SEG_DESC_SIZE >> 8) & 0xFF;
2232 /* don't account for the first 4 bytes in descriptor header*/
2233 hdr[3] = (XCOPY_BLK2BLK_SEG_DESC_SIZE - 4 /* SEG_DESC_SRC_INDEX_OFFSET */) & 0xFF;
2234 hdr[4] = (src_index >> 8) & 0xFF;
2235 hdr[5] = src_index & 0xFF;
2236 hdr[6] = (dst_index >> 8) & 0xFF;
2237 hdr[7] = dst_index & 0xFF;
2238}
2239
2240static void iscsi_xcopy_populate_desc(uint8_t *desc, int dc, int cat,
2241 int src_index, int dst_index, int num_blks,
2242 uint64_t src_lba, uint64_t dst_lba)
2243{
2244 iscsi_xcopy_desc_hdr(desc, dc, cat, src_index, dst_index);
2245
2246 /* The caller should verify the request size */
2247 assert(num_blks < 65536);
2248 desc[10] = (num_blks >> 8) & 0xFF;
2249 desc[11] = num_blks & 0xFF;
2250 desc[12] = (src_lba >> 56) & 0xFF;
2251 desc[13] = (src_lba >> 48) & 0xFF;
2252 desc[14] = (src_lba >> 40) & 0xFF;
2253 desc[15] = (src_lba >> 32) & 0xFF;
2254 desc[16] = (src_lba >> 24) & 0xFF;
2255 desc[17] = (src_lba >> 16) & 0xFF;
2256 desc[18] = (src_lba >> 8) & 0xFF;
2257 desc[19] = src_lba & 0xFF;
2258 desc[20] = (dst_lba >> 56) & 0xFF;
2259 desc[21] = (dst_lba >> 48) & 0xFF;
2260 desc[22] = (dst_lba >> 40) & 0xFF;
2261 desc[23] = (dst_lba >> 32) & 0xFF;
2262 desc[24] = (dst_lba >> 24) & 0xFF;
2263 desc[25] = (dst_lba >> 16) & 0xFF;
2264 desc[26] = (dst_lba >> 8) & 0xFF;
2265 desc[27] = dst_lba & 0xFF;
2266}
2267
2268static void iscsi_xcopy_populate_header(unsigned char *buf, int list_id, int str,
2269 int list_id_usage, int prio,
2270 int tgt_desc_len,
2271 int seg_desc_len, int inline_data_len)
2272{
2273 buf[0] = list_id;
2274 buf[1] = ((str & 1) << 5) | ((list_id_usage & 3) << 3) | (prio & 7);
2275 buf[2] = (tgt_desc_len >> 8) & 0xFF;
2276 buf[3] = tgt_desc_len & 0xFF;
2277 buf[8] = (seg_desc_len >> 24) & 0xFF;
2278 buf[9] = (seg_desc_len >> 16) & 0xFF;
2279 buf[10] = (seg_desc_len >> 8) & 0xFF;
2280 buf[11] = seg_desc_len & 0xFF;
2281 buf[12] = (inline_data_len >> 24) & 0xFF;
2282 buf[13] = (inline_data_len >> 16) & 0xFF;
2283 buf[14] = (inline_data_len >> 8) & 0xFF;
2284 buf[15] = inline_data_len & 0xFF;
2285}
2286
2287static void iscsi_xcopy_data(struct iscsi_data *data,
2288 IscsiLun *src, int64_t src_lba,
2289 IscsiLun *dst, int64_t dst_lba,
2290 uint16_t num_blocks)
2291{
2292 uint8_t *buf;
2293 const int src_offset = XCOPY_DESC_OFFSET;
2294 const int dst_offset = XCOPY_DESC_OFFSET + IDENT_DESCR_TGT_DESCR_SIZE;
2295 const int seg_offset = dst_offset + IDENT_DESCR_TGT_DESCR_SIZE;
2296
2297 data->size = XCOPY_DESC_OFFSET +
2298 IDENT_DESCR_TGT_DESCR_SIZE * 2 +
2299 XCOPY_BLK2BLK_SEG_DESC_SIZE;
2300 data->data = g_malloc0(data->size);
2301 buf = data->data;
2302
2303 /* Initialise the parameter list header */
2304 iscsi_xcopy_populate_header(buf, 1, 0, 2 /* LIST_ID_USAGE_DISCARD */,
2305 0, 2 * IDENT_DESCR_TGT_DESCR_SIZE,
2306 XCOPY_BLK2BLK_SEG_DESC_SIZE,
2307 0);
2308
2309 /* Initialise CSCD list with one src + one dst descriptor */
2310 iscsi_populate_target_desc(&buf[src_offset], src);
2311 iscsi_populate_target_desc(&buf[dst_offset], dst);
2312
2313 /* Initialise one segment descriptor */
2314 iscsi_xcopy_populate_desc(&buf[seg_offset], 0, 0, 0, 1, num_blocks,
2315 src_lba, dst_lba);
2316}
2317
2318static int coroutine_fn iscsi_co_copy_range_to(BlockDriverState *bs,
2319 BdrvChild *src,
2320 uint64_t src_offset,
2321 BdrvChild *dst,
2322 uint64_t dst_offset,
2323 uint64_t bytes,
Vladimir Sementsov-Ogievskiy67b51fb2018-07-09 19:37:17 +03002324 BdrvRequestFlags read_flags,
2325 BdrvRequestFlags write_flags)
Fam Zheng604dfaa2018-06-01 17:26:46 +08002326{
2327 IscsiLun *dst_lun = dst->bs->opaque;
2328 IscsiLun *src_lun;
2329 struct IscsiTask iscsi_task;
2330 struct iscsi_data data;
2331 int r = 0;
2332 int block_size;
2333
2334 if (src->bs->drv->bdrv_co_copy_range_to != iscsi_co_copy_range_to) {
2335 return -ENOTSUP;
2336 }
2337 src_lun = src->bs->opaque;
2338
2339 if (!src_lun->dd || !dst_lun->dd) {
2340 return -ENOTSUP;
2341 }
2342 if (!is_byte_request_lun_aligned(dst_offset, bytes, dst_lun)) {
2343 return -ENOTSUP;
2344 }
2345 if (!is_byte_request_lun_aligned(src_offset, bytes, src_lun)) {
2346 return -ENOTSUP;
2347 }
2348 if (dst_lun->block_size != src_lun->block_size ||
2349 !dst_lun->block_size) {
2350 return -ENOTSUP;
2351 }
2352
2353 block_size = dst_lun->block_size;
2354 if (bytes / block_size > 65535) {
2355 return -ENOTSUP;
2356 }
2357
2358 iscsi_xcopy_data(&data,
2359 src_lun, src_offset / block_size,
2360 dst_lun, dst_offset / block_size,
2361 bytes / block_size);
2362
2363 iscsi_co_init_iscsitask(dst_lun, &iscsi_task);
2364
2365 qemu_mutex_lock(&dst_lun->mutex);
2366 iscsi_task.task = iscsi_xcopy_task(data.size);
2367retry:
2368 if (iscsi_scsi_command_async(dst_lun->iscsi, dst_lun->lun,
2369 iscsi_task.task, iscsi_co_generic_cb,
2370 &data,
2371 &iscsi_task) != 0) {
2372 r = -EIO;
2373 goto out_unlock;
2374 }
2375
2376 iscsi_co_wait_for_task(&iscsi_task, dst_lun);
2377
2378 if (iscsi_task.do_retry) {
2379 iscsi_task.complete = 0;
2380 goto retry;
2381 }
2382
2383 if (iscsi_task.status != SCSI_STATUS_GOOD) {
2384 r = iscsi_task.err_code;
2385 goto out_unlock;
2386 }
2387
2388out_unlock:
Fam Zhengecc983a2018-07-10 14:31:16 +08002389
2390 trace_iscsi_xcopy(src_lun, src_offset, dst_lun, dst_offset, bytes, r);
Fam Zheng604dfaa2018-06-01 17:26:46 +08002391 g_free(iscsi_task.task);
2392 qemu_mutex_unlock(&dst_lun->mutex);
2393 g_free(iscsi_task.err_str);
2394 return r;
2395}
2396
Peter Lievende8864e2012-11-17 16:13:24 +01002397
Max Reitz26542672019-02-01 20:29:25 +01002398static const char *const iscsi_strong_runtime_opts[] = {
2399 "transport",
2400 "portal",
2401 "target",
2402 "user",
2403 "password",
2404 "password-secret",
2405 "lun",
2406 "initiator-name",
2407 "header-digest",
2408
2409 NULL
2410};
2411
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002412static BlockDriver bdrv_iscsi = {
2413 .format_name = "iscsi",
2414 .protocol_name = "iscsi",
2415
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002416 .instance_size = sizeof(IscsiLun),
2417 .bdrv_parse_filename = iscsi_parse_filename,
2418 .bdrv_file_open = iscsi_open,
2419 .bdrv_close = iscsi_close,
Maxim Levitsky5a5e7f82020-03-26 03:12:18 +02002420 .bdrv_co_create_opts = bdrv_co_create_opts_simple,
2421 .create_opts = &bdrv_create_opts_simple,
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002422 .bdrv_reopen_prepare = iscsi_reopen_prepare,
2423 .bdrv_reopen_commit = iscsi_reopen_commit,
Paolo Bonzini2b148f32018-03-01 17:36:18 +01002424 .bdrv_co_invalidate_cache = iscsi_co_invalidate_cache,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002425
2426 .bdrv_getlength = iscsi_getlength,
Peter Lieven186d4f22013-10-24 12:06:55 +02002427 .bdrv_get_info = iscsi_get_info,
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002428 .bdrv_co_truncate = iscsi_co_truncate,
Kevin Wolfd34682c2013-12-11 19:26:16 +01002429 .bdrv_refresh_limits = iscsi_refresh_limits,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002430
Eric Blake92809c32018-02-13 14:26:48 -06002431 .bdrv_co_block_status = iscsi_co_block_status,
Eric Blake97c7e852016-07-15 17:23:01 -06002432 .bdrv_co_pdiscard = iscsi_co_pdiscard,
Fam Zheng604dfaa2018-06-01 17:26:46 +08002433 .bdrv_co_copy_range_from = iscsi_co_copy_range_from,
2434 .bdrv_co_copy_range_to = iscsi_co_copy_range_to,
Eric Blake94d047a2016-06-01 15:10:05 -06002435 .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes,
Peter Lieven063c3372013-12-05 16:47:17 +01002436 .bdrv_co_readv = iscsi_co_readv,
Eric Blakee18a58b2018-04-24 17:01:57 -05002437 .bdrv_co_writev = iscsi_co_writev,
Peter Lieven063c3372013-12-05 16:47:17 +01002438 .bdrv_co_flush_to_disk = iscsi_co_flush,
Ronnie Sahlbergfa6acb02012-04-24 16:29:04 +10002439
Ronnie Sahlberg98392452012-05-25 21:59:01 +10002440#ifdef __linux__
Ronnie Sahlberg98392452012-05-25 21:59:01 +10002441 .bdrv_aio_ioctl = iscsi_aio_ioctl,
2442#endif
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02002443
2444 .bdrv_detach_aio_context = iscsi_detach_aio_context,
2445 .bdrv_attach_aio_context = iscsi_attach_aio_context,
Max Reitz26542672019-02-01 20:29:25 +01002446
2447 .strong_runtime_opts = iscsi_strong_runtime_opts,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002448};
2449
Roy Shtermane0ae4982016-10-09 11:14:56 +03002450#if LIBISCSI_API_VERSION >= (20160603)
2451static BlockDriver bdrv_iser = {
2452 .format_name = "iser",
2453 .protocol_name = "iser",
2454
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002455 .instance_size = sizeof(IscsiLun),
2456 .bdrv_parse_filename = iscsi_parse_filename,
2457 .bdrv_file_open = iscsi_open,
2458 .bdrv_close = iscsi_close,
Maxim Levitsky5a5e7f82020-03-26 03:12:18 +02002459 .bdrv_co_create_opts = bdrv_co_create_opts_simple,
2460 .create_opts = &bdrv_create_opts_simple,
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002461 .bdrv_reopen_prepare = iscsi_reopen_prepare,
2462 .bdrv_reopen_commit = iscsi_reopen_commit,
Paolo Bonzinib16a7cf2018-03-15 15:30:56 +01002463 .bdrv_co_invalidate_cache = iscsi_co_invalidate_cache,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002464
2465 .bdrv_getlength = iscsi_getlength,
2466 .bdrv_get_info = iscsi_get_info,
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002467 .bdrv_co_truncate = iscsi_co_truncate,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002468 .bdrv_refresh_limits = iscsi_refresh_limits,
2469
Eric Blake92809c32018-02-13 14:26:48 -06002470 .bdrv_co_block_status = iscsi_co_block_status,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002471 .bdrv_co_pdiscard = iscsi_co_pdiscard,
Fam Zheng604dfaa2018-06-01 17:26:46 +08002472 .bdrv_co_copy_range_from = iscsi_co_copy_range_from,
2473 .bdrv_co_copy_range_to = iscsi_co_copy_range_to,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002474 .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes,
2475 .bdrv_co_readv = iscsi_co_readv,
Eric Blakee18a58b2018-04-24 17:01:57 -05002476 .bdrv_co_writev = iscsi_co_writev,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002477 .bdrv_co_flush_to_disk = iscsi_co_flush,
2478
2479#ifdef __linux__
2480 .bdrv_aio_ioctl = iscsi_aio_ioctl,
2481#endif
2482
2483 .bdrv_detach_aio_context = iscsi_detach_aio_context,
2484 .bdrv_attach_aio_context = iscsi_attach_aio_context,
Max Reitz26542672019-02-01 20:29:25 +01002485
2486 .strong_runtime_opts = iscsi_strong_runtime_opts,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002487};
2488#endif
2489
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002490static void iscsi_block_init(void)
2491{
2492 bdrv_register(&bdrv_iscsi);
Roy Shtermane0ae4982016-10-09 11:14:56 +03002493#if LIBISCSI_API_VERSION >= (20160603)
2494 bdrv_register(&bdrv_iser);
2495#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002496}
2497
2498block_init(iscsi_block_init);