blob: 34f97ab64605b7ea1090f118680071ff67801483 [file] [log] [blame]
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>
Marc-André Lureau89fc45d2022-03-23 19:57:36 +040031#include "sysemu/sysemu.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"
Markus Armbrustere2c1c342022-12-21 14:35:49 +010036#include "block/block-io.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010037#include "block/block_int.h"
Max Reitz609f45e2018-06-14 21:14:28 +020038#include "block/qdict.h"
Paolo Bonzini08e2c9f2017-08-22 09:23:55 +020039#include "scsi/constants.h"
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -070040#include "qemu/iov.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020041#include "qemu/module.h"
Markus Armbruster922a01a2018-02-01 12:18:46 +010042#include "qemu/option.h"
Fam Zhengcea25272016-09-21 12:27:14 +080043#include "qemu/uuid.h"
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +030044#include "sysemu/replay.h"
Markus Armbrustere688df62018-02-01 12:18:31 +010045#include "qapi/error.h"
Philippe Mathieu-Daudéf68c0142020-09-13 21:53:45 +020046#include "qapi/qapi-commands-machine.h"
Markus Armbruster452fcdb2018-02-01 12:18:39 +010047#include "qapi/qmp/qdict.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010048#include "qapi/qmp/qstring.h"
Daniel P. Berrangeb1893462016-01-21 14:19:21 +000049#include "crypto/secret.h"
Paolo Bonzinie5b57282017-08-22 07:08:27 +020050#include "scsi/utils.h"
Fam Zhengecc983a2018-07-10 14:31:16 +080051#include "trace.h"
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110052
Paolo Bonzinie5b57282017-08-22 07:08:27 +020053/* Conflict between scsi/utils.h and libiscsi! :( */
54#define SCSI_XFER_NONE ISCSI_XFER_NONE
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110055#include <iscsi/iscsi.h>
Thomas Huthdf71ca82019-01-14 14:37:20 +010056#define inline __attribute__((gnu_inline)) /* required for libiscsi v1.9.0 */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110057#include <iscsi/scsi-lowlevel.h>
Thomas Huthdf71ca82019-01-14 14:37:20 +010058#undef inline
Paolo Bonzinie5b57282017-08-22 07:08:27 +020059#undef SCSI_XFER_NONE
60QEMU_BUILD_BUG_ON((int)SCSI_XFER_NONE != (int)ISCSI_XFER_NONE);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110061
Ronnie Sahlberg98392452012-05-25 21:59:01 +100062#ifdef __linux__
63#include <scsi/sg.h>
Ronnie Sahlberg98392452012-05-25 21:59:01 +100064#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110065
66typedef struct IscsiLun {
67 struct iscsi_context *iscsi;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +020068 AioContext *aio_context;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110069 int lun;
Ronnie Sahlbergdbfff6d2012-05-25 21:59:01 +100070 enum scsi_inquiry_peripheral_device_type type;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +110071 int block_size;
Paolo Bonzinic7b4a952012-05-26 09:41:13 +020072 uint64_t num_blocks;
Ronnie Sahlbergc9b9f682012-05-22 19:56:36 +100073 int events;
Peter Lieven5b5d34e2012-12-06 10:46:47 +010074 QEMUTimer *nop_timer;
Peter Lieven05b685f2015-04-07 22:08:15 +020075 QEMUTimer *event_timer;
Paolo Bonzinid045c462017-02-22 19:07:25 +010076 QemuMutex mutex;
Peter Lievenf18a7cb2013-07-19 09:19:39 +020077 struct scsi_inquiry_logical_block_provisioning lbp;
78 struct scsi_inquiry_block_limits bl;
Fam Zhengcc9743c2018-06-01 17:26:44 +080079 struct scsi_inquiry_device_designator *dd;
Peter Lievend4cd9612013-10-24 12:07:02 +020080 unsigned char *zeroblock;
Peter Lievene1123a32016-07-18 10:52:20 +020081 /* The allocmap tracks which clusters (pages) on the iSCSI target are
82 * allocated and which are not. In case a target returns zeros for
83 * unallocated pages (iscsilun->lprz) we can directly return zeros instead
84 * of reading zeros over the wire if a read request falls within an
85 * unallocated block. As there are 3 possible states we need 2 bitmaps to
86 * track. allocmap_valid keeps track if QEMU's information about a page is
87 * valid. allocmap tracks if a page is allocated or not. In case QEMU has no
88 * valid information about a page the corresponding allocmap entry should be
89 * switched to unallocated as well to force a new lookup of the allocation
90 * status as lookups are generally skipped if a page is suspect to be
91 * allocated. If a iSCSI target is opened with cache.direct = on the
92 * allocmap_valid does not exist turning all cached information invalid so
93 * that a fresh lookup is made for any page even if allocmap entry returns
94 * it's unallocated. */
95 unsigned long *allocmap;
96 unsigned long *allocmap_valid;
97 long allocmap_size;
Eric Blakeba059e72018-02-13 14:26:46 -060098 int cluster_size;
Peter Lieven9281fe92014-06-04 15:47:39 +020099 bool use_16_for_rw;
Fam Zheng43ae8fb2015-02-25 12:40:08 +0800100 bool write_protected;
Peter Lieven0a386e42015-04-16 16:08:26 +0200101 bool lbpme;
102 bool lbprz;
Peter Lieven752ce452015-04-16 16:08:28 +0200103 bool dpofua;
Peter Lieven0a386e42015-04-16 16:08:26 +0200104 bool has_write_same;
Peter Lieven5dd7a532015-06-16 13:45:07 +0200105 bool request_timed_out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100106} IscsiLun;
107
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200108typedef struct IscsiTask {
109 int status;
110 int complete;
111 int retries;
112 int do_retry;
113 struct scsi_task *task;
114 Coroutine *co;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200115 IscsiLun *iscsilun;
Peter Lievenefc6de02014-05-30 23:36:47 +0200116 QEMUTimer retry_timer;
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800117 int err_code;
Peter Lievene38bc232017-12-08 12:51:08 +0100118 char *err_str;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200119} IscsiTask;
120
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100121typedef struct IscsiAIOCB {
Markus Armbruster7c84b1b2014-10-07 13:59:14 +0200122 BlockAIOCB common;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100123 QEMUBH *bh;
124 IscsiLun *iscsilun;
125 struct scsi_task *task;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100126 int status;
Peter Lieven1dde7162013-02-21 16:15:54 +0100127 int64_t sector_num;
128 int nb_sectors;
Fam Zheng4bb17ab2015-11-09 18:16:49 +0800129 int ret;
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000130#ifdef __linux__
131 sg_io_hdr_t *ioh;
132#endif
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100133 bool cancelled;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100134} IscsiAIOCB;
135
Peter Lieven5dd7a532015-06-16 13:45:07 +0200136/* libiscsi uses time_t so its enough to process events every second */
137#define EVENT_INTERVAL 1000
Peter Lieven5b5d34e2012-12-06 10:46:47 +0100138#define NOP_INTERVAL 5000
139#define MAX_NOP_FAILURES 3
Peter Lievenefc6de02014-05-30 23:36:47 +0200140#define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times)
Peter Lieven59dd0a22015-04-16 16:08:30 +0200141static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048, 8192, 32768};
Peter Lieven5b5d34e2012-12-06 10:46:47 +0100142
Stefan Weil5d831be2014-06-13 20:42:57 +0200143/* this threshold is a trade-off knob to choose between
Peter Lieven5917af82014-04-28 17:11:33 +0200144 * the potential additional overhead of an extra GET_LBA_STATUS request
145 * vs. unnecessarily reading a lot of zero sectors over the wire.
146 * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES
147 * sectors we check the allocation status of the area covered by the
148 * request first if the allocationmap indicates that the area might be
149 * unallocated. */
150#define ISCSI_CHECKALLOC_THRES 64
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100151
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100152#ifdef __linux__
153
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100154static void
Paolo Bonzinicfb3f502012-08-18 23:38:03 +0200155iscsi_bh_cb(void *p)
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200156{
157 IscsiAIOCB *acb = p;
158
159 qemu_bh_delete(acb->bh);
160
Fam Zheng722d9332014-09-11 13:41:15 +0800161 acb->common.cb(acb->common.opaque, acb->status);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200162
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200163 if (acb->task != NULL) {
164 scsi_free_scsi_task(acb->task);
165 acb->task = NULL;
166 }
167
Fam Zheng80074292014-09-11 13:41:28 +0800168 qemu_aio_unref(acb);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200169}
170
Paolo Bonzinicfb3f502012-08-18 23:38:03 +0200171static void
172iscsi_schedule_bh(IscsiAIOCB *acb)
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200173{
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200174 if (acb->bh) {
175 return;
176 }
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +0200177 acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200178 qemu_bh_schedule(acb->bh);
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200179}
180
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100181#endif
182
Peter Lieven8b9dfe92013-12-14 17:31:40 +0100183static void iscsi_co_generic_bh_cb(void *opaque)
184{
185 struct IscsiTask *iTask = opaque;
Paolo Bonzini19196312017-02-13 14:52:31 +0100186
Peter Lievenfcd470d2014-06-10 09:52:16 +0200187 iTask->complete = 1;
Paolo Bonzini19196312017-02-13 14:52:31 +0100188 aio_co_wake(iTask->co);
Peter Lieven8b9dfe92013-12-14 17:31:40 +0100189}
190
Peter Lievenefc6de02014-05-30 23:36:47 +0200191static void iscsi_retry_timer_expired(void *opaque)
192{
193 struct IscsiTask *iTask = opaque;
Peter Lievenfcd470d2014-06-10 09:52:16 +0200194 iTask->complete = 1;
Peter Lievenefc6de02014-05-30 23:36:47 +0200195 if (iTask->co) {
Paolo Bonzini2f47da52017-02-13 14:52:29 +0100196 aio_co_wake(iTask->co);
Peter Lievenefc6de02014-05-30 23:36:47 +0200197 }
198}
199
200static inline unsigned exp_random(double mean)
201{
202 return -mean * log((double)rand() / RAND_MAX);
203}
204
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800205/* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in
206 * libiscsi 1.10.0, together with other constants we need. Use it as
207 * a hint that we have to define them ourselves if needed, to keep the
208 * minimum required libiscsi version at 1.9.0. We use an ASCQ macro for
209 * the test because SCSI_STATUS_* is an enum.
210 *
211 * To guard against future changes where SCSI_SENSE_ASCQ_* also becomes
212 * an enum, check against the LIBISCSI_API_VERSION macro, which was
213 * introduced in 1.11.0. If it is present, there is no need to define
214 * anything.
215 */
216#if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \
217 !defined(LIBISCSI_API_VERSION)
218#define SCSI_STATUS_TASK_SET_FULL 0x28
219#define SCSI_STATUS_TIMEOUT 0x0f000002
220#define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600
221#define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00
Peter Lieven90497362015-06-26 12:18:01 +0200222#endif
223
Roy Shterman583ec222016-10-09 11:14:55 +0300224#ifndef LIBISCSI_API_VERSION
225#define LIBISCSI_API_VERSION 20130701
226#endif
227
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800228static int iscsi_translate_sense(struct scsi_sense *sense)
229{
Paolo Bonzini8c460262019-07-02 11:40:41 +0200230 return scsi_sense_to_errno(sense->key,
231 (sense->ascq & 0xFF00) >> 8,
232 sense->ascq & 0xFF);
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800233}
234
Paolo Bonzinid045c462017-02-22 19:07:25 +0100235/* Called (via iscsi_service) with QemuMutex held. */
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200236static void
237iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
238 void *command_data, void *opaque)
239{
240 struct IscsiTask *iTask = opaque;
241 struct scsi_task *task = command_data;
242
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200243 iTask->status = status;
244 iTask->do_retry = 0;
Xie Yongjic58daf72020-07-01 18:54:44 +0800245 iTask->err_code = 0;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200246 iTask->task = task;
247
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200248 if (status != SCSI_STATUS_GOOD) {
Xie Yongjic58daf72020-07-01 18:54:44 +0800249 iTask->err_code = -EIO;
Peter Lievenefc6de02014-05-30 23:36:47 +0200250 if (iTask->retries++ < ISCSI_CMD_RETRIES) {
Peter Lieven90497362015-06-26 12:18:01 +0200251 if (status == SCSI_STATUS_BUSY ||
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800252 status == SCSI_STATUS_TIMEOUT ||
253 status == SCSI_STATUS_TASK_SET_FULL) {
Peter Lievenefc6de02014-05-30 23:36:47 +0200254 unsigned retry_time =
255 exp_random(iscsi_retry_times[iTask->retries - 1]);
Fam Zhenge01dd3d2015-11-05 13:00:09 +0800256 if (status == SCSI_STATUS_TIMEOUT) {
Peter Lieven5dd7a532015-06-16 13:45:07 +0200257 /* make sure the request is rescheduled AFTER the
258 * reconnect is initiated */
259 retry_time = EVENT_INTERVAL * 2;
260 iTask->iscsilun->request_timed_out = true;
261 }
262 error_report("iSCSI Busy/TaskSetFull/TimeOut"
263 " (retry #%u in %u ms): %s",
Peter Lievenefc6de02014-05-30 23:36:47 +0200264 iTask->retries, retry_time,
265 iscsi_get_error(iscsi));
266 aio_timer_init(iTask->iscsilun->aio_context,
267 &iTask->retry_timer, QEMU_CLOCK_REALTIME,
268 SCALE_MS, iscsi_retry_timer_expired, iTask);
269 timer_mod(&iTask->retry_timer,
270 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time);
271 iTask->do_retry = 1;
Paolo Bonzini50801522023-01-10 17:36:33 +0100272 return;
Xie Yongjidd3b0022020-07-01 18:54:43 +0800273 } else if (status == SCSI_STATUS_CHECK_CONDITION) {
274 int error = iscsi_translate_sense(&task->sense);
275 if (error == EAGAIN) {
276 error_report("iSCSI CheckCondition: %s",
277 iscsi_get_error(iscsi));
278 iTask->do_retry = 1;
279 } else {
280 iTask->err_code = -error;
281 iTask->err_str = g_strdup(iscsi_get_error(iscsi));
282 }
Peter Lievenefc6de02014-05-30 23:36:47 +0200283 }
284 }
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200285 }
286
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200287 if (iTask->co) {
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +0300288 replay_bh_schedule_oneshot_event(iTask->iscsilun->aio_context,
289 iscsi_co_generic_bh_cb, iTask);
Peter Lievenfcd470d2014-06-10 09:52:16 +0200290 } else {
291 iTask->complete = 1;
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200292 }
293}
294
Paolo Bonzini3d6dcf42022-09-22 10:49:07 +0200295static void coroutine_fn
296iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask)
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200297{
298 *iTask = (struct IscsiTask) {
Peter Lievenefc6de02014-05-30 23:36:47 +0200299 .co = qemu_coroutine_self(),
Peter Lievenefc6de02014-05-30 23:36:47 +0200300 .iscsilun = iscsilun,
Peter Lieven54a5c1d2013-07-19 09:19:40 +0200301 };
302}
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200303
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100304#ifdef __linux__
305
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100306/* Called (via iscsi_service) with QemuMutex held. */
Paolo Bonzini27cbd822012-08-18 23:37:31 +0200307static void
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100308iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data,
309 void *private_data)
310{
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200311 IscsiAIOCB *acb = private_data;
312
Stefan Hajnoczi88e94fd2018-02-15 11:15:26 +0000313 /* If the command callback hasn't been called yet, drop the task */
314 if (!acb->bh) {
315 /* Call iscsi_aio_ioctl_cb() with SCSI_STATUS_CANCELLED */
316 iscsi_scsi_cancel_task(iscsi, acb->task);
317 }
318
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100319 qemu_aio_unref(acb); /* acquired in iscsi_aio_cancel() */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100320}
321
322static void
Markus Armbruster7c84b1b2014-10-07 13:59:14 +0200323iscsi_aio_cancel(BlockAIOCB *blockacb)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100324{
325 IscsiAIOCB *acb = (IscsiAIOCB *)blockacb;
326 IscsiLun *iscsilun = acb->iscsilun;
327
Gan Qixinc208b0e2020-12-03 15:50:55 +0800328 WITH_QEMU_LOCK_GUARD(&iscsilun->mutex) {
Stefan Hajnoczic1004482018-02-03 07:16:21 +0100329
Gan Qixinc208b0e2020-12-03 15:50:55 +0800330 /* If it was cancelled or completed already, our work is done here */
331 if (acb->cancelled || acb->status != -EINPROGRESS) {
332 return;
333 }
334
335 acb->cancelled = true;
336
337 qemu_aio_ref(acb); /* released in iscsi_abort_task_cb() */
338
339 /* send a task mgmt call to the target to cancel the task on the target */
340 if (iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
341 iscsi_abort_task_cb, acb) < 0) {
342 qemu_aio_unref(acb); /* since iscsi_abort_task_cb() won't be called */
343 }
Paolo Bonzini1bd075f2012-08-18 23:35:49 +0200344 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100345}
346
Stefan Hajnoczid7331be2012-10-31 16:34:37 +0100347static const AIOCBInfo iscsi_aiocb_info = {
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100348 .aiocb_size = sizeof(IscsiAIOCB),
Fam Zheng722d9332014-09-11 13:41:15 +0800349 .cancel_async = iscsi_aio_cancel,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100350};
351
Philippe Mathieu-Daudéd4cef0c2019-02-20 01:05:53 +0100352#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100353
354static void iscsi_process_read(void *arg);
355static void iscsi_process_write(void *arg);
356
Paolo Bonzinid045c462017-02-22 19:07:25 +0100357/* Called with QemuMutex held. */
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100358static void
359iscsi_set_events(IscsiLun *iscsilun)
360{
361 struct iscsi_context *iscsi = iscsilun->iscsi;
Peter Lieven05b685f2015-04-07 22:08:15 +0200362 int ev = iscsi_which_events(iscsi);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100363
Ronnie Sahlbergc9b9f682012-05-22 19:56:36 +1000364 if (ev != iscsilun->events) {
Fam Zhengdca21ef2015-10-23 11:08:05 +0800365 aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsi),
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 Hajnoczi826cc322021-12-07 13:23:31 +0000368 NULL, 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
Gan Qixinc208b0e2020-12-03 15:50:55 +0800378 WITH_QEMU_LOCK_GUARD(&iscsilun->mutex) {
379 /* check for timed out requests */
380 iscsi_service(iscsilun->iscsi, 0);
Stefan Hajnoczi83d11972018-02-03 07:16:20 +0100381
Gan Qixinc208b0e2020-12-03 15:50:55 +0800382 if (iscsilun->request_timed_out) {
383 iscsilun->request_timed_out = false;
384 iscsi_reconnect(iscsilun->iscsi);
385 }
Peter Lieven5dd7a532015-06-16 13:45:07 +0200386
Gan Qixinc208b0e2020-12-03 15:50:55 +0800387 /*
388 * newer versions of libiscsi may return zero events. Ensure we are
389 * able to return to service once this situation changes.
390 */
391 iscsi_set_events(iscsilun);
Peter Lieven5dd7a532015-06-16 13:45:07 +0200392 }
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
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +0300432static bool is_byte_request_lun_aligned(int64_t offset, int64_t bytes,
Eric Blake94d047a2016-06-01 15:10:05 -0600433 IscsiLun *iscsilun)
Peter Lieven91bea4e2013-07-11 14:16:27 +0200434{
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +0300435 if (offset % iscsilun->block_size || bytes % iscsilun->block_size) {
Eric Blake94d047a2016-06-01 15:10:05 -0600436 error_report("iSCSI misaligned request: "
437 "iscsilun->block_size %u, offset %" PRIi64
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +0300438 ", bytes %" PRIi64,
439 iscsilun->block_size, offset, bytes);
Eric Blake94d047a2016-06-01 15:10:05 -0600440 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
Paolo Bonzinid045c462017-02-22 19:07:25 +0100786out_unlock:
787 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +0100788 g_free(iTask.err_str);
Peter Lievenb03c3802014-04-28 13:11:32 +0200789out:
790 if (iTask.task != NULL) {
791 scsi_free_scsi_task(iTask.task);
792 }
Eric Blake92809c32018-02-13 14:26:48 -0600793 if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID && file) {
Fam Zheng33998332016-01-26 11:58:52 +0800794 *file = bs;
795 }
Peter Lievenb03c3802014-04-28 13:11:32 +0200796 return ret;
797}
798
Peter Lieven063c3372013-12-05 16:47:17 +0100799static int coroutine_fn iscsi_co_readv(BlockDriverState *bs,
800 int64_t sector_num, int nb_sectors,
801 QEMUIOVector *iov)
Peter Lieven1dde7162013-02-21 16:15:54 +0100802{
803 IscsiLun *iscsilun = bs->opaque;
Peter Lieven063c3372013-12-05 16:47:17 +0100804 struct IscsiTask iTask;
Peter Lieven1dde7162013-02-21 16:15:54 +0100805 uint64_t lba;
806 uint32_t num_sectors;
Peter Lievene38bc232017-12-08 12:51:08 +0100807 int r = 0;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100808
Eric Blake94d047a2016-06-01 15:10:05 -0600809 if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
Peter Lieven063c3372013-12-05 16:47:17 +0100810 return -EINVAL;
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000811 }
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000812
Eric Blake6bd01f12016-07-15 12:32:04 -0600813 if (bs->bl.max_transfer) {
814 assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer);
Peter Lievendc9e7162014-10-27 10:18:48 +0100815 }
816
Peter Lievene1123a32016-07-18 10:52:20 +0200817 /* if cache.direct is off and we have a valid entry in our allocation map
818 * we can skip checking the block status and directly return zeroes if
819 * the request falls within an unallocated area */
Eric Blake04a408f2018-02-13 14:26:47 -0600820 if (iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE,
821 nb_sectors * BDRV_SECTOR_SIZE) &&
822 !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE,
823 nb_sectors * BDRV_SECTOR_SIZE)) {
Peter Lievene1123a32016-07-18 10:52:20 +0200824 qemu_iovec_memset(iov, 0, 0x00, iov->size);
825 return 0;
826 }
827
828 if (nb_sectors >= ISCSI_CHECKALLOC_THRES &&
Eric Blake04a408f2018-02-13 14:26:47 -0600829 !iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE,
830 nb_sectors * BDRV_SECTOR_SIZE) &&
831 !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE,
832 nb_sectors * BDRV_SECTOR_SIZE)) {
Eric Blake92809c32018-02-13 14:26:48 -0600833 int64_t pnum;
Peter Lievene1123a32016-07-18 10:52:20 +0200834 /* check the block status from the beginning of the cluster
835 * containing the start sector */
Eric Blake92809c32018-02-13 14:26:48 -0600836 int64_t head;
837 int ret;
Eric Blakeba059e72018-02-13 14:26:46 -0600838
Eric Blake92809c32018-02-13 14:26:48 -0600839 assert(iscsilun->cluster_size);
840 head = (sector_num * BDRV_SECTOR_SIZE) % iscsilun->cluster_size;
841 ret = iscsi_co_block_status(bs, true,
842 sector_num * BDRV_SECTOR_SIZE - head,
843 BDRV_REQUEST_MAX_BYTES, &pnum, NULL, NULL);
Peter Lievenb03c3802014-04-28 13:11:32 +0200844 if (ret < 0) {
845 return ret;
846 }
Peter Lievene1123a32016-07-18 10:52:20 +0200847 /* if the whole request falls into an unallocated area we can avoid
Eric Blakeba059e72018-02-13 14:26:46 -0600848 * reading and directly return zeroes instead */
Peter Lievene1123a32016-07-18 10:52:20 +0200849 if (ret & BDRV_BLOCK_ZERO &&
Eric Blake92809c32018-02-13 14:26:48 -0600850 pnum >= nb_sectors * BDRV_SECTOR_SIZE + head) {
Peter Lievenb03c3802014-04-28 13:11:32 +0200851 qemu_iovec_memset(iov, 0, 0x00, iov->size);
852 return 0;
853 }
854 }
Peter Lievenb03c3802014-04-28 13:11:32 +0200855
Peter Lieven063c3372013-12-05 16:47:17 +0100856 lba = sector_qemu2lun(sector_num, iscsilun);
857 num_sectors = sector_qemu2lun(nb_sectors, iscsilun);
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000858
Peter Lieven063c3372013-12-05 16:47:17 +0100859 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100860 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven063c3372013-12-05 16:47:17 +0100861retry:
Peter Lieven9281fe92014-06-04 15:47:39 +0200862 if (iscsilun->use_16_for_rw) {
Roy Shterman583ec222016-10-09 11:14:55 +0300863#if LIBISCSI_API_VERSION >= (20160603)
864 iTask.task = iscsi_read16_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
865 num_sectors * iscsilun->block_size,
866 iscsilun->block_size, 0, 0, 0, 0, 0,
867 iscsi_co_generic_cb, &iTask,
868 (struct scsi_iovec *)iov->iov, iov->niov);
869 } else {
870 iTask.task = iscsi_read10_iov_task(iscsilun->iscsi, iscsilun->lun, lba,
871 num_sectors * iscsilun->block_size,
872 iscsilun->block_size,
873 0, 0, 0, 0, 0,
874 iscsi_co_generic_cb, &iTask,
875 (struct scsi_iovec *)iov->iov, iov->niov);
876 }
877#else
Peter Lieven063c3372013-12-05 16:47:17 +0100878 iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba,
879 num_sectors * iscsilun->block_size,
880 iscsilun->block_size, 0, 0, 0, 0, 0,
881 iscsi_co_generic_cb, &iTask);
Peter Lieven9281fe92014-06-04 15:47:39 +0200882 } else {
Peter Lieven063c3372013-12-05 16:47:17 +0100883 iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba,
884 num_sectors * iscsilun->block_size,
Stefan Weil219c2522013-12-17 08:57:10 +0100885 iscsilun->block_size,
Stefan Weil219c2522013-12-17 08:57:10 +0100886 0, 0, 0, 0, 0,
Peter Lieven063c3372013-12-05 16:47:17 +0100887 iscsi_co_generic_cb, &iTask);
Ronnie Sahlbergf4dfa672012-05-22 20:10:05 +1000888 }
Roy Shterman583ec222016-10-09 11:14:55 +0300889#endif
Peter Lieven063c3372013-12-05 16:47:17 +0100890 if (iTask.task == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +0100891 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +0100892 return -ENOMEM;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100893 }
Roy Shterman583ec222016-10-09 11:14:55 +0300894#if LIBISCSI_API_VERSION < (20160603)
Peter Lieven063c3372013-12-05 16:47:17 +0100895 scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov);
Roy Shterman583ec222016-10-09 11:14:55 +0300896#endif
Peter Lieven91bea4e2013-07-11 14:16:27 +0200897
Fam Zheng66e75c02018-06-01 17:26:45 +0800898 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lieven063c3372013-12-05 16:47:17 +0100899 if (iTask.task != NULL) {
900 scsi_free_scsi_task(iTask.task);
901 iTask.task = NULL;
Peter Lieven1dde7162013-02-21 16:15:54 +0100902 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100903
Peter Lieven063c3372013-12-05 16:47:17 +0100904 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +0100905 iTask.complete = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100906 goto retry;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100907 }
908
Peter Lieven063c3372013-12-05 16:47:17 +0100909 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +0100910 error_report("iSCSI READ10/16 failed at lba %" PRIu64 ": %s",
911 lba, iTask.err_str);
912 r = iTask.err_code;
Peter Lieven1dde7162013-02-21 16:15:54 +0100913 }
914
Peter Lievene38bc232017-12-08 12:51:08 +0100915 qemu_mutex_unlock(&iscsilun->mutex);
916 g_free(iTask.err_str);
917 return r;
Peter Lieven1dde7162013-02-21 16:15:54 +0100918}
919
Peter Lieven063c3372013-12-05 16:47:17 +0100920static int coroutine_fn iscsi_co_flush(BlockDriverState *bs)
Peter Lieven1dde7162013-02-21 16:15:54 +0100921{
922 IscsiLun *iscsilun = bs->opaque;
Peter Lieven063c3372013-12-05 16:47:17 +0100923 struct IscsiTask iTask;
Peter Lievene38bc232017-12-08 12:51:08 +0100924 int r = 0;
Peter Lieven1dde7162013-02-21 16:15:54 +0100925
Peter Lieven73b53942015-04-16 16:08:29 +0200926 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +0100927 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven063c3372013-12-05 16:47:17 +0100928retry:
929 if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0,
930 0, iscsi_co_generic_cb, &iTask) == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +0100931 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +0100932 return -ENOMEM;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100933 }
934
Fam Zheng66e75c02018-06-01 17:26:45 +0800935 iscsi_co_wait_for_task(&iTask, iscsilun);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100936
Peter Lieven063c3372013-12-05 16:47:17 +0100937 if (iTask.task != NULL) {
938 scsi_free_scsi_task(iTask.task);
939 iTask.task = NULL;
940 }
941
942 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +0100943 iTask.complete = 0;
Peter Lieven063c3372013-12-05 16:47:17 +0100944 goto retry;
945 }
946
947 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +0100948 error_report("iSCSI SYNCHRONIZECACHE10 failed: %s", iTask.err_str);
949 r = iTask.err_code;
Peter Lieven063c3372013-12-05 16:47:17 +0100950 }
951
Peter Lievene38bc232017-12-08 12:51:08 +0100952 qemu_mutex_unlock(&iscsilun->mutex);
953 g_free(iTask.err_str);
954 return r;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +1100955}
956
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000957#ifdef __linux__
Paolo Bonzinid045c462017-02-22 19:07:25 +0100958/* Called (via iscsi_service) with QemuMutex held. */
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000959static void
960iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status,
961 void *command_data, void *opaque)
962{
963 IscsiAIOCB *acb = opaque;
964
Stefan Hajnoczi88e94fd2018-02-15 11:15:26 +0000965 if (status == SCSI_STATUS_CANCELLED) {
966 if (!acb->bh) {
967 acb->status = -ECANCELED;
968 iscsi_schedule_bh(acb);
969 }
970 return;
971 }
972
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000973 acb->status = 0;
974 if (status < 0) {
975 error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
976 iscsi_get_error(iscsi));
Paolo Bonzini8c460262019-07-02 11:40:41 +0200977 acb->status = -iscsi_translate_sense(&acb->task->sense);
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000978 }
979
980 acb->ioh->driver_status = 0;
981 acb->ioh->host_status = 0;
982 acb->ioh->resid = 0;
Vadim Rozenfeld644c6869d2016-05-13 13:03:22 +0200983 acb->ioh->status = status;
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000984
985#define SG_ERR_DRIVER_SENSE 0x08
986
987 if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) {
988 int ss;
989
990 acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE;
991
992 acb->ioh->sb_len_wr = acb->task->datain.size - 2;
Chen Qunff0507c2020-04-18 14:26:02 +0800993 ss = MIN(acb->ioh->mx_sb_len, acb->ioh->sb_len_wr);
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000994 memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
995 }
996
Paolo Bonzinicfb3f502012-08-18 23:38:03 +0200997 iscsi_schedule_bh(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +1000998}
999
Fam Zheng4bb17ab2015-11-09 18:16:49 +08001000static void iscsi_ioctl_bh_completion(void *opaque)
1001{
1002 IscsiAIOCB *acb = opaque;
1003
1004 qemu_bh_delete(acb->bh);
1005 acb->common.cb(acb->common.opaque, acb->ret);
1006 qemu_aio_unref(acb);
1007}
1008
1009static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf)
1010{
1011 BlockDriverState *bs = acb->common.bs;
1012 IscsiLun *iscsilun = bs->opaque;
1013 int ret = 0;
1014
1015 switch (req) {
1016 case SG_GET_VERSION_NUM:
1017 *(int *)buf = 30000;
1018 break;
1019 case SG_GET_SCSI_ID:
1020 ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
1021 break;
1022 default:
1023 ret = -EINVAL;
1024 }
1025 assert(!acb->bh);
1026 acb->bh = aio_bh_new(bdrv_get_aio_context(bs),
1027 iscsi_ioctl_bh_completion, acb);
1028 acb->ret = ret;
1029 qemu_bh_schedule(acb->bh);
1030}
1031
Markus Armbruster7c84b1b2014-10-07 13:59:14 +02001032static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001033 unsigned long int req, void *buf,
Markus Armbruster097310b2014-10-07 13:59:15 +02001034 BlockCompletionFunc *cb, void *opaque)
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001035{
1036 IscsiLun *iscsilun = bs->opaque;
1037 struct iscsi_context *iscsi = iscsilun->iscsi;
1038 struct iscsi_data data;
1039 IscsiAIOCB *acb;
1040
Stefan Hajnoczid7331be2012-10-31 16:34:37 +01001041 acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001042
1043 acb->iscsilun = iscsilun;
Paolo Bonzini1bd075f2012-08-18 23:35:49 +02001044 acb->bh = NULL;
1045 acb->status = -EINPROGRESS;
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001046 acb->ioh = buf;
Stefan Hajnoczic1004482018-02-03 07:16:21 +01001047 acb->cancelled = false;
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001048
Fam Zheng4bb17ab2015-11-09 18:16:49 +08001049 if (req != SG_IO) {
1050 iscsi_ioctl_handle_emulated(acb, req, buf);
1051 return &acb->common;
1052 }
1053
Peter Lievena6b31672016-05-24 10:59:28 +02001054 if (acb->ioh->cmd_len > SCSI_CDB_MAX_SIZE) {
1055 error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)",
1056 acb->ioh->cmd_len, SCSI_CDB_MAX_SIZE);
1057 qemu_aio_unref(acb);
1058 return NULL;
1059 }
1060
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001061 acb->task = malloc(sizeof(struct scsi_task));
1062 if (acb->task == NULL) {
1063 error_report("iSCSI: Failed to allocate task for scsi command. %s",
1064 iscsi_get_error(iscsi));
Fam Zheng80074292014-09-11 13:41:28 +08001065 qemu_aio_unref(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001066 return NULL;
1067 }
1068 memset(acb->task, 0, sizeof(struct scsi_task));
1069
1070 switch (acb->ioh->dxfer_direction) {
1071 case SG_DXFER_TO_DEV:
1072 acb->task->xfer_dir = SCSI_XFER_WRITE;
1073 break;
1074 case SG_DXFER_FROM_DEV:
1075 acb->task->xfer_dir = SCSI_XFER_READ;
1076 break;
1077 default:
1078 acb->task->xfer_dir = SCSI_XFER_NONE;
1079 break;
1080 }
1081
1082 acb->task->cdb_size = acb->ioh->cmd_len;
1083 memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
1084 acb->task->expxferlen = acb->ioh->dxfer_len;
1085
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001086 data.size = 0;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001087 qemu_mutex_lock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001088 if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001089 if (acb->ioh->iovec_count == 0) {
1090 data.data = acb->ioh->dxferp;
1091 data.size = acb->ioh->dxfer_len;
1092 } else {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001093 scsi_task_set_iov_out(acb->task,
1094 (struct scsi_iovec *) acb->ioh->dxferp,
1095 acb->ioh->iovec_count);
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001096 }
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001097 }
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001098
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001099 if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
1100 iscsi_aio_ioctl_cb,
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001101 (data.size > 0) ? &data : NULL,
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001102 acb) != 0) {
Paolo Bonzinid045c462017-02-22 19:07:25 +01001103 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001104 scsi_free_scsi_task(acb->task);
Fam Zheng80074292014-09-11 13:41:28 +08001105 qemu_aio_unref(acb);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001106 return NULL;
1107 }
1108
1109 /* tell libiscsi to read straight into the buffer we got from ioctl */
1110 if (acb->task->xfer_dir == SCSI_XFER_READ) {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001111 if (acb->ioh->iovec_count == 0) {
1112 scsi_task_add_data_in_buffer(acb->task,
1113 acb->ioh->dxfer_len,
1114 acb->ioh->dxferp);
1115 } else {
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001116 scsi_task_set_iov_in(acb->task,
1117 (struct scsi_iovec *) acb->ioh->dxferp,
1118 acb->ioh->iovec_count);
Ronnie Sahlberg0a53f012013-06-23 08:07:08 -07001119 }
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001120 }
1121
1122 iscsi_set_events(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001123 qemu_mutex_unlock(&iscsilun->mutex);
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001124
1125 return &acb->common;
1126}
1127
Ronnie Sahlberg98392452012-05-25 21:59:01 +10001128#endif
1129
Emanuele Giuseppe Espositoc86422c2023-01-13 21:42:04 +01001130static int64_t coroutine_fn
1131iscsi_co_getlength(BlockDriverState *bs)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001132{
1133 IscsiLun *iscsilun = bs->opaque;
1134 int64_t len;
1135
1136 len = iscsilun->num_blocks;
1137 len *= iscsilun->block_size;
1138
1139 return len;
1140}
1141
Peter Lieven65f3e332013-07-19 09:19:41 +02001142static int
Vladimir Sementsov-Ogievskiy0c802282021-09-03 13:28:06 +03001143coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset,
1144 int64_t bytes)
Peter Lieven65f3e332013-07-19 09:19:41 +02001145{
1146 IscsiLun *iscsilun = bs->opaque;
1147 struct IscsiTask iTask;
1148 struct unmap_list list;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001149 int r = 0;
Peter Lieven65f3e332013-07-19 09:19:41 +02001150
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001151 if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
Eric Blake49228d12016-11-17 14:13:57 -06001152 return -ENOTSUP;
1153 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001154
1155 if (!iscsilun->lbp.lbpu) {
1156 /* UNMAP is not supported by the target */
1157 return 0;
1158 }
1159
Vladimir Sementsov-Ogievskiy0c802282021-09-03 13:28:06 +03001160 /*
1161 * We don't want to overflow list.num which is uint32_t.
1162 * We rely on our max_pdiscard.
1163 */
1164 assert(bytes / iscsilun->block_size <= UINT32_MAX);
1165
Eric Blake97c7e852016-07-15 17:23:01 -06001166 list.lba = offset / iscsilun->block_size;
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001167 list.num = bytes / iscsilun->block_size;
Peter Lieven65f3e332013-07-19 09:19:41 +02001168
Peter Lieven01a6a232013-10-24 12:07:01 +02001169 iscsi_co_init_iscsitask(iscsilun, &iTask);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001170 qemu_mutex_lock(&iscsilun->mutex);
Peter Lieven01a6a232013-10-24 12:07:01 +02001171retry:
1172 if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1,
Eric Blake97c7e852016-07-15 17:23:01 -06001173 iscsi_co_generic_cb, &iTask) == NULL) {
Paolo Bonzinid045c462017-02-22 19:07:25 +01001174 r = -ENOMEM;
1175 goto out_unlock;
Peter Lieven65f3e332013-07-19 09:19:41 +02001176 }
1177
Fam Zheng66e75c02018-06-01 17:26:45 +08001178 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lieven65f3e332013-07-19 09:19:41 +02001179
Peter Lieven01a6a232013-10-24 12:07:01 +02001180 if (iTask.task != NULL) {
1181 scsi_free_scsi_task(iTask.task);
1182 iTask.task = NULL;
1183 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001184
Peter Lieven01a6a232013-10-24 12:07:01 +02001185 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +01001186 iTask.complete = 0;
Peter Lieven01a6a232013-10-24 12:07:01 +02001187 goto retry;
1188 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001189
Eric Blake04a408f2018-02-13 14:26:47 -06001190 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievenaef172f2017-12-08 12:51:07 +01001191
Peter Lieven01a6a232013-10-24 12:07:01 +02001192 if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
1193 /* the target might fail with a check condition if it
1194 is not happy with the alignment of the UNMAP request
1195 we silently fail in this case */
Paolo Bonzinid045c462017-02-22 19:07:25 +01001196 goto out_unlock;
Peter Lieven01a6a232013-10-24 12:07:01 +02001197 }
Peter Lieven65f3e332013-07-19 09:19:41 +02001198
Peter Lieven01a6a232013-10-24 12:07:01 +02001199 if (iTask.status != SCSI_STATUS_GOOD) {
Peter Lievene38bc232017-12-08 12:51:08 +01001200 error_report("iSCSI UNMAP failed at lba %" PRIu64 ": %s",
1201 list.lba, iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001202 r = iTask.err_code;
1203 goto out_unlock;
Peter Lieven65f3e332013-07-19 09:19:41 +02001204 }
1205
Paolo Bonzinid045c462017-02-22 19:07:25 +01001206out_unlock:
1207 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +01001208 g_free(iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001209 return r;
Peter Lieven65f3e332013-07-19 09:19:41 +02001210}
1211
Peter Lievend4cd9612013-10-24 12:07:02 +02001212static int
Eric Blake94d047a2016-06-01 15:10:05 -06001213coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +03001214 int64_t bytes, BdrvRequestFlags flags)
Peter Lievend4cd9612013-10-24 12:07:02 +02001215{
1216 IscsiLun *iscsilun = bs->opaque;
1217 struct IscsiTask iTask;
1218 uint64_t lba;
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +03001219 uint64_t nb_blocks;
Peter Lieven9281fe92014-06-04 15:47:39 +02001220 bool use_16_for_ws = iscsilun->use_16_for_rw;
Paolo Bonzinid045c462017-02-22 19:07:25 +01001221 int r = 0;
Peter Lievend4cd9612013-10-24 12:07:02 +02001222
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001223 if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
Eric Blake94d047a2016-06-01 15:10:05 -06001224 return -ENOTSUP;
Peter Lievend4cd9612013-10-24 12:07:02 +02001225 }
1226
Peter Lieven9281fe92014-06-04 15:47:39 +02001227 if (flags & BDRV_REQ_MAY_UNMAP) {
1228 if (!use_16_for_ws && !iscsilun->lbp.lbpws10) {
1229 /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */
1230 use_16_for_ws = true;
1231 }
1232 if (use_16_for_ws && !iscsilun->lbp.lbpws) {
1233 /* WRITESAME16 with UNMAP is not supported by the target,
1234 * fall back and try WRITESAME10/16 without UNMAP */
1235 flags &= ~BDRV_REQ_MAY_UNMAP;
1236 use_16_for_ws = iscsilun->use_16_for_rw;
1237 }
Paolo Bonzinifa6252b2013-11-22 13:39:54 +01001238 }
1239
Peter Lievendbe5c582014-04-28 13:23:25 +02001240 if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
Peter Lieven9281fe92014-06-04 15:47:39 +02001241 /* WRITESAME without UNMAP is not supported by the target */
Peter Lievend4cd9612013-10-24 12:07:02 +02001242 return -ENOTSUP;
1243 }
1244
Eric Blake94d047a2016-06-01 15:10:05 -06001245 lba = offset / iscsilun->block_size;
Manos Pitsidianakisf5a5ca72017-06-09 13:18:08 +03001246 nb_blocks = bytes / iscsilun->block_size;
Peter Lievend4cd9612013-10-24 12:07:02 +02001247
1248 if (iscsilun->zeroblock == NULL) {
Kevin Wolf4d5a3f82014-05-20 13:30:49 +02001249 iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size);
1250 if (iscsilun->zeroblock == NULL) {
1251 return -ENOMEM;
1252 }
Peter Lievend4cd9612013-10-24 12:07:02 +02001253 }
1254
Paolo Bonzinid045c462017-02-22 19:07:25 +01001255 qemu_mutex_lock(&iscsilun->mutex);
Peter Lievend4cd9612013-10-24 12:07:02 +02001256 iscsi_co_init_iscsitask(iscsilun, &iTask);
1257retry:
Peter Lieven9281fe92014-06-04 15:47:39 +02001258 if (use_16_for_ws) {
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +03001259 /*
1260 * iscsi_writesame16_task num_blocks argument is uint32_t. We rely here
1261 * on our max_pwrite_zeroes limit.
1262 */
1263 assert(nb_blocks <= UINT32_MAX);
Peter Lieven9281fe92014-06-04 15:47:39 +02001264 iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
1265 iscsilun->zeroblock, iscsilun->block_size,
1266 nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
1267 0, 0, iscsi_co_generic_cb, &iTask);
1268 } else {
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +03001269 /*
1270 * iscsi_writesame10_task num_blocks argument is uint16_t. We rely here
1271 * on our max_pwrite_zeroes limit.
1272 */
1273 assert(nb_blocks <= UINT16_MAX);
Peter Lieven9281fe92014-06-04 15:47:39 +02001274 iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
1275 iscsilun->zeroblock, iscsilun->block_size,
1276 nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
1277 0, 0, iscsi_co_generic_cb, &iTask);
1278 }
1279 if (iTask.task == NULL) {
Paolo Bonzinif6eb0b32017-03-03 16:23:36 +01001280 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lieven92397112013-12-20 10:02:47 +01001281 return -ENOMEM;
Peter Lievend4cd9612013-10-24 12:07:02 +02001282 }
1283
Fam Zheng66e75c02018-06-01 17:26:45 +08001284 iscsi_co_wait_for_task(&iTask, iscsilun);
Peter Lievend4cd9612013-10-24 12:07:02 +02001285
Peter Lievend9738fd2014-02-22 13:17:24 +01001286 if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
1287 iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&
Paolo Bonzini27898a52014-04-02 12:12:50 +02001288 (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE ||
1289 iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) {
Peter Lievend9738fd2014-02-22 13:17:24 +01001290 /* WRITE SAME is not supported by the target */
1291 iscsilun->has_write_same = false;
1292 scsi_free_scsi_task(iTask.task);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001293 r = -ENOTSUP;
1294 goto out_unlock;
Peter Lievend9738fd2014-02-22 13:17:24 +01001295 }
1296
Peter Lievend4cd9612013-10-24 12:07:02 +02001297 if (iTask.task != NULL) {
1298 scsi_free_scsi_task(iTask.task);
1299 iTask.task = NULL;
1300 }
1301
1302 if (iTask.do_retry) {
Peter Lieven837c3902014-02-18 13:08:39 +01001303 iTask.complete = 0;
Peter Lievend4cd9612013-10-24 12:07:02 +02001304 goto retry;
1305 }
1306
1307 if (iTask.status != SCSI_STATUS_GOOD) {
Eric Blake04a408f2018-02-13 14:26:47 -06001308 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievene38bc232017-12-08 12:51:08 +01001309 error_report("iSCSI WRITESAME10/16 failed at lba %" PRIu64 ": %s",
1310 lba, iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001311 r = iTask.err_code;
1312 goto out_unlock;
Peter Lievend4cd9612013-10-24 12:07:02 +02001313 }
1314
Peter Lievenb03c3802014-04-28 13:11:32 +02001315 if (flags & BDRV_REQ_MAY_UNMAP) {
Eric Blake04a408f2018-02-13 14:26:47 -06001316 iscsi_allocmap_set_invalid(iscsilun, offset, bytes);
Peter Lievenb03c3802014-04-28 13:11:32 +02001317 } else {
Eric Blake04a408f2018-02-13 14:26:47 -06001318 iscsi_allocmap_set_allocated(iscsilun, offset, bytes);
Peter Lievenb03c3802014-04-28 13:11:32 +02001319 }
1320
Paolo Bonzinid045c462017-02-22 19:07:25 +01001321out_unlock:
1322 qemu_mutex_unlock(&iscsilun->mutex);
Peter Lievene38bc232017-12-08 12:51:08 +01001323 g_free(iTask.err_str);
Paolo Bonzinid045c462017-02-22 19:07:25 +01001324 return r;
Peter Lievend4cd9612013-10-24 12:07:02 +02001325}
1326
Kevin Wolf43171422016-12-08 14:23:07 +01001327static void apply_chap(struct iscsi_context *iscsi, QemuOpts *opts,
Paolo Bonzinif2917852014-02-17 14:43:53 +01001328 Error **errp)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001329{
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001330 const char *user = NULL;
1331 const char *password = NULL;
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001332 const char *secretid;
1333 char *secret = NULL;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001334
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001335 user = qemu_opt_get(opts, "user");
1336 if (!user) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001337 return;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001338 }
1339
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001340 secretid = qemu_opt_get(opts, "password-secret");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001341 password = qemu_opt_get(opts, "password");
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001342 if (secretid && password) {
1343 error_setg(errp, "'password' and 'password-secret' properties are "
1344 "mutually exclusive");
1345 return;
1346 }
1347 if (secretid) {
1348 secret = qcrypto_secret_lookup_as_utf8(secretid, errp);
1349 if (!secret) {
1350 return;
1351 }
1352 password = secret;
1353 } else if (!password) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001354 error_setg(errp, "CHAP username specified but no password was given");
1355 return;
Daniel P. Berrangé610783c2022-12-01 04:08:07 -05001356 } else {
1357 warn_report("iSCSI block driver 'password' option is deprecated, "
1358 "use 'password-secret' instead");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001359 }
1360
1361 if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001362 error_setg(errp, "Failed to set initiator username and password");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001363 }
Daniel P. Berrangeb1893462016-01-21 14:19:21 +00001364
1365 g_free(secret);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001366}
1367
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001368static void apply_header_digest(struct iscsi_context *iscsi, QemuOpts *opts,
Paolo Bonzinif2917852014-02-17 14:43:53 +01001369 Error **errp)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001370{
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001371 const char *digest = NULL;
1372
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001373 digest = qemu_opt_get(opts, "header-digest");
1374 if (!digest) {
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001375 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001376 } else if (!strcmp(digest, "crc32c")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001377 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001378 } else if (!strcmp(digest, "none")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001379 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001380 } else if (!strcmp(digest, "crc32c-none")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001381 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE);
Kevin Wolf31eb1202016-12-08 14:23:11 +01001382 } else if (!strcmp(digest, "none-crc32c")) {
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001383 iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
1384 } else {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001385 error_setg(errp, "Invalid header-digest setting : %s", digest);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001386 }
1387}
1388
Kevin Wolfd4e79922016-12-08 14:23:08 +01001389static char *get_initiator_name(QemuOpts *opts)
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001390{
Paolo Bonzini5accc842013-08-02 17:02:01 +02001391 const char *name;
1392 char *iscsi_name;
1393 UuidInfo *uuid_info;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001394
Kevin Wolfd4e79922016-12-08 14:23:08 +01001395 name = qemu_opt_get(opts, "initiator-name");
1396 if (name) {
1397 return g_strdup(name);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001398 }
1399
Paolo Bonzini5accc842013-08-02 17:02:01 +02001400 uuid_info = qmp_query_uuid(NULL);
1401 if (strcmp(uuid_info->UUID, UUID_NONE) == 0) {
1402 name = qemu_get_vm_name();
Paolo Bonzinif2ef4a62012-08-06 10:54:41 +02001403 } else {
Paolo Bonzini5accc842013-08-02 17:02:01 +02001404 name = uuid_info->UUID;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001405 }
Paolo Bonzini5accc842013-08-02 17:02:01 +02001406 iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
1407 name ? ":" : "", name ? name : "");
1408 qapi_free_UuidInfo(uuid_info);
1409 return iscsi_name;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001410}
1411
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001412static void iscsi_nop_timed_event(void *opaque)
1413{
1414 IscsiLun *iscsilun = opaque;
1415
Daniel Brodsky6e8a3552020-04-03 21:21:08 -07001416 QEMU_LOCK_GUARD(&iscsilun->mutex);
Peter Lieven5dd7a532015-06-16 13:45:07 +02001417 if (iscsi_get_nops_in_flight(iscsilun->iscsi) >= MAX_NOP_FAILURES) {
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001418 error_report("iSCSI: NOP timeout. Reconnecting...");
Peter Lieven5dd7a532015-06-16 13:45:07 +02001419 iscsilun->request_timed_out = true;
1420 } else if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) {
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001421 error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
Daniel Brodsky6e8a3552020-04-03 21:21:08 -07001422 return;
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001423 }
1424
Alex Blighbc72ad62013-08-21 16:03:08 +01001425 timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001426 iscsi_set_events(iscsilun);
1427}
Peter Lieven5b5d34e2012-12-06 10:46:47 +01001428
Paolo Bonzinif2917852014-02-17 14:43:53 +01001429static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp)
Peter Lievencb1b83e2013-02-18 14:50:46 +01001430{
1431 struct scsi_task *task = NULL;
1432 struct scsi_readcapacity10 *rc10 = NULL;
1433 struct scsi_readcapacity16 *rc16 = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001434 int retries = ISCSI_CMD_RETRIES;
1435
Paolo Bonzini12888442013-05-31 13:56:24 +02001436 do {
1437 if (task != NULL) {
1438 scsi_free_scsi_task(task);
1439 task = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001440 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001441
Paolo Bonzini12888442013-05-31 13:56:24 +02001442 switch (iscsilun->type) {
1443 case TYPE_DISK:
1444 task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun);
1445 if (task != NULL && task->status == SCSI_STATUS_GOOD) {
1446 rc16 = scsi_datain_unmarshall(task);
1447 if (rc16 == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001448 error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data.");
Paolo Bonzini12888442013-05-31 13:56:24 +02001449 } else {
1450 iscsilun->block_size = rc16->block_length;
1451 iscsilun->num_blocks = rc16->returned_lba + 1;
Peter Lieven0a386e42015-04-16 16:08:26 +02001452 iscsilun->lbpme = !!rc16->lbpme;
1453 iscsilun->lbprz = !!rc16->lbprz;
Peter Lieven9281fe92014-06-04 15:47:39 +02001454 iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff);
Paolo Bonzini12888442013-05-31 13:56:24 +02001455 }
Zhu Lingshan1cb6d132015-12-29 11:32:14 +08001456 break;
Paolo Bonzini12888442013-05-31 13:56:24 +02001457 }
Zhu Lingshan1cb6d132015-12-29 11:32:14 +08001458 if (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
1459 && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) {
1460 break;
1461 }
1462 /* Fall through and try READ CAPACITY(10) instead. */
Paolo Bonzini12888442013-05-31 13:56:24 +02001463 case TYPE_ROM:
1464 task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0);
1465 if (task != NULL && task->status == SCSI_STATUS_GOOD) {
1466 rc10 = scsi_datain_unmarshall(task);
1467 if (rc10 == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001468 error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data.");
Paolo Bonzini12888442013-05-31 13:56:24 +02001469 } else {
1470 iscsilun->block_size = rc10->block_size;
1471 if (rc10->lba == 0) {
1472 /* blank disk loaded */
1473 iscsilun->num_blocks = 0;
1474 } else {
1475 iscsilun->num_blocks = rc10->lba + 1;
1476 }
1477 }
1478 }
1479 break;
1480 default:
Paolo Bonzinif2917852014-02-17 14:43:53 +01001481 return;
Paolo Bonzini12888442013-05-31 13:56:24 +02001482 }
1483 } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
1484 && task->sense.key == SCSI_SENSE_UNIT_ATTENTION
1485 && retries-- > 0);
1486
1487 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
Zhu Lingshan240125b2015-12-16 12:40:40 +08001488 error_setg(errp, "iSCSI: failed to send readcapacity10/16 command");
Peter Lieven6d1f2522015-08-14 13:33:36 +02001489 } else if (!iscsilun->block_size ||
1490 iscsilun->block_size % BDRV_SECTOR_SIZE) {
1491 error_setg(errp, "iSCSI: the target returned an invalid "
1492 "block size of %d.", iscsilun->block_size);
Paolo Bonzini12888442013-05-31 13:56:24 +02001493 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001494 if (task) {
1495 scsi_free_scsi_task(task);
1496 }
Peter Lievencb1b83e2013-02-18 14:50:46 +01001497}
1498
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001499static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun,
Peter Lieven24d3bd62014-02-17 18:34:08 +01001500 int evpd, int pc, void **inq, Error **errp)
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001501{
1502 int full_size;
1503 struct scsi_task *task = NULL;
1504 task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
1505 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
1506 goto fail;
1507 }
1508 full_size = scsi_datain_getfullsize(task);
1509 if (full_size > task->datain.size) {
1510 scsi_free_scsi_task(task);
1511
1512 /* we need more data for the full list */
1513 task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size);
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001514 if (task == NULL || task->status != SCSI_STATUS_GOOD) {
1515 goto fail;
1516 }
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001517 }
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001518
Peter Lieven24d3bd62014-02-17 18:34:08 +01001519 *inq = scsi_datain_unmarshall(task);
1520 if (*inq == NULL) {
1521 error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob");
Markus Armbruster172fc4d2014-04-25 16:50:35 +02001522 goto fail_with_err;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001523 }
1524
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001525 return task;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001526
1527fail:
Markus Armbruster172fc4d2014-04-25 16:50:35 +02001528 error_setg(errp, "iSCSI: Inquiry command failed : %s",
1529 iscsi_get_error(iscsi));
1530fail_with_err:
Peter Lieven24d3bd62014-02-17 18:34:08 +01001531 if (task != NULL) {
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001532 scsi_free_scsi_task(task);
Paolo Bonzini35cb1742014-02-17 14:43:52 +01001533 }
1534 return NULL;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001535}
1536
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001537static void iscsi_detach_aio_context(BlockDriverState *bs)
1538{
1539 IscsiLun *iscsilun = bs->opaque;
1540
Fam Zhengdca21ef2015-10-23 11:08:05 +08001541 aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsilun->iscsi),
Stefan Hajnoczi60f782b2023-05-16 15:02:38 -04001542 NULL, NULL, NULL, NULL, NULL);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001543 iscsilun->events = 0;
1544
1545 if (iscsilun->nop_timer) {
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001546 timer_free(iscsilun->nop_timer);
1547 iscsilun->nop_timer = NULL;
1548 }
Peter Lieven05b685f2015-04-07 22:08:15 +02001549 if (iscsilun->event_timer) {
Peter Lieven05b685f2015-04-07 22:08:15 +02001550 timer_free(iscsilun->event_timer);
1551 iscsilun->event_timer = NULL;
1552 }
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001553}
1554
1555static void iscsi_attach_aio_context(BlockDriverState *bs,
1556 AioContext *new_context)
1557{
1558 IscsiLun *iscsilun = bs->opaque;
1559
1560 iscsilun->aio_context = new_context;
1561 iscsi_set_events(iscsilun);
1562
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001563 /* Set up a timer for sending out iSCSI NOPs */
1564 iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context,
1565 QEMU_CLOCK_REALTIME, SCALE_MS,
1566 iscsi_nop_timed_event, iscsilun);
1567 timer_mod(iscsilun->nop_timer,
1568 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
Peter Lieven05b685f2015-04-07 22:08:15 +02001569
Peter Lieven5dd7a532015-06-16 13:45:07 +02001570 /* Set up a timer for periodic calls to iscsi_set_events and to
1571 * scan for command timeout */
Peter Lieven05b685f2015-04-07 22:08:15 +02001572 iscsilun->event_timer = aio_timer_new(iscsilun->aio_context,
1573 QEMU_CLOCK_REALTIME, SCALE_MS,
Peter Lieven5dd7a532015-06-16 13:45:07 +02001574 iscsi_timed_check_events, iscsilun);
1575 timer_mod(iscsilun->event_timer,
1576 qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001577}
1578
Peter Lieven7191f202015-04-16 16:08:27 +02001579static void iscsi_modesense_sync(IscsiLun *iscsilun)
Fam Zhengc1d40962014-10-30 19:23:46 +08001580{
1581 struct scsi_task *task;
1582 struct scsi_mode_sense *ms = NULL;
Peter Lieven7191f202015-04-16 16:08:27 +02001583 iscsilun->write_protected = false;
Peter Lieven752ce452015-04-16 16:08:28 +02001584 iscsilun->dpofua = false;
Fam Zhengc1d40962014-10-30 19:23:46 +08001585
1586 task = iscsi_modesense6_sync(iscsilun->iscsi, iscsilun->lun,
1587 1, SCSI_MODESENSE_PC_CURRENT,
1588 0x3F, 0, 255);
1589 if (task == NULL) {
1590 error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s",
1591 iscsi_get_error(iscsilun->iscsi));
1592 goto out;
1593 }
1594
1595 if (task->status != SCSI_STATUS_GOOD) {
1596 error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable");
1597 goto out;
1598 }
1599 ms = scsi_datain_unmarshall(task);
1600 if (!ms) {
1601 error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s",
1602 iscsi_get_error(iscsilun->iscsi));
1603 goto out;
1604 }
Peter Lieven7191f202015-04-16 16:08:27 +02001605 iscsilun->write_protected = ms->device_specific_parameter & 0x80;
Peter Lieven752ce452015-04-16 16:08:28 +02001606 iscsilun->dpofua = ms->device_specific_parameter & 0x10;
Fam Zhengc1d40962014-10-30 19:23:46 +08001607
1608out:
1609 if (task) {
1610 scsi_free_scsi_task(task);
1611 }
Fam Zhengc1d40962014-10-30 19:23:46 +08001612}
1613
Kevin Wolf43171422016-12-08 14:23:07 +01001614static void iscsi_parse_iscsi_option(const char *target, QDict *options)
1615{
1616 QemuOptsList *list;
1617 QemuOpts *opts;
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001618 const char *user, *password, *password_secret, *initiator_name,
Kevin Wolf1d560102016-12-08 14:23:10 +01001619 *header_digest, *timeout;
Kevin Wolf43171422016-12-08 14:23:07 +01001620
1621 list = qemu_find_opts("iscsi");
1622 if (!list) {
1623 return;
1624 }
1625
1626 opts = qemu_opts_find(list, target);
1627 if (opts == NULL) {
1628 opts = QTAILQ_FIRST(&list->head);
1629 if (!opts) {
1630 return;
1631 }
1632 }
1633
1634 user = qemu_opt_get(opts, "user");
1635 if (user) {
1636 qdict_set_default_str(options, "user", user);
1637 }
1638
1639 password = qemu_opt_get(opts, "password");
1640 if (password) {
1641 qdict_set_default_str(options, "password", password);
1642 }
1643
1644 password_secret = qemu_opt_get(opts, "password-secret");
1645 if (password_secret) {
1646 qdict_set_default_str(options, "password-secret", password_secret);
1647 }
Kevin Wolfd4e79922016-12-08 14:23:08 +01001648
1649 initiator_name = qemu_opt_get(opts, "initiator-name");
1650 if (initiator_name) {
1651 qdict_set_default_str(options, "initiator-name", initiator_name);
1652 }
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001653
1654 header_digest = qemu_opt_get(opts, "header-digest");
1655 if (header_digest) {
Kevin Wolf31eb1202016-12-08 14:23:11 +01001656 /* -iscsi takes upper case values, but QAPI only supports lower case
1657 * enum constant names, so we have to convert here. */
1658 char *qapi_value = g_ascii_strdown(header_digest, -1);
1659 qdict_set_default_str(options, "header-digest", qapi_value);
1660 g_free(qapi_value);
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001661 }
Kevin Wolf1d560102016-12-08 14:23:10 +01001662
1663 timeout = qemu_opt_get(opts, "timeout");
1664 if (timeout) {
1665 qdict_set_default_str(options, "timeout", timeout);
1666 }
Kevin Wolf43171422016-12-08 14:23:07 +01001667}
1668
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001669/*
1670 * We support iscsi url's on the form
1671 * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
1672 */
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001673static void iscsi_parse_filename(const char *filename, QDict *options,
1674 Error **errp)
1675{
1676 struct iscsi_url *iscsi_url;
1677 const char *transport_name;
1678 char *lun_str;
1679
1680 iscsi_url = iscsi_parse_full_url(NULL, filename);
1681 if (iscsi_url == NULL) {
1682 error_setg(errp, "Failed to parse URL : %s", filename);
1683 return;
1684 }
1685
1686#if LIBISCSI_API_VERSION >= (20160603)
1687 switch (iscsi_url->transport) {
1688 case TCP_TRANSPORT:
1689 transport_name = "tcp";
1690 break;
1691 case ISER_TRANSPORT:
1692 transport_name = "iser";
1693 break;
1694 default:
1695 error_setg(errp, "Unknown transport type (%d)",
1696 iscsi_url->transport);
1697 return;
1698 }
1699#else
1700 transport_name = "tcp";
1701#endif
1702
1703 qdict_set_default_str(options, "transport", transport_name);
1704 qdict_set_default_str(options, "portal", iscsi_url->portal);
1705 qdict_set_default_str(options, "target", iscsi_url->target);
1706
1707 lun_str = g_strdup_printf("%d", iscsi_url->lun);
1708 qdict_set_default_str(options, "lun", lun_str);
1709 g_free(lun_str);
1710
Kevin Wolf43171422016-12-08 14:23:07 +01001711 /* User/password from -iscsi take precedence over those from the URL */
1712 iscsi_parse_iscsi_option(iscsi_url->target, options);
1713
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001714 if (iscsi_url->user[0] != '\0') {
1715 qdict_set_default_str(options, "user", iscsi_url->user);
1716 qdict_set_default_str(options, "password", iscsi_url->passwd);
1717 }
1718
1719 iscsi_destroy_url(iscsi_url);
1720}
1721
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001722static QemuOptsList runtime_opts = {
1723 .name = "iscsi",
1724 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
1725 .desc = {
1726 {
1727 .name = "transport",
1728 .type = QEMU_OPT_STRING,
1729 },
1730 {
1731 .name = "portal",
1732 .type = QEMU_OPT_STRING,
1733 },
1734 {
1735 .name = "target",
1736 .type = QEMU_OPT_STRING,
1737 },
1738 {
1739 .name = "user",
1740 .type = QEMU_OPT_STRING,
1741 },
1742 {
1743 .name = "password",
1744 .type = QEMU_OPT_STRING,
1745 },
1746 {
Kevin Wolf43171422016-12-08 14:23:07 +01001747 .name = "password-secret",
1748 .type = QEMU_OPT_STRING,
1749 },
1750 {
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001751 .name = "lun",
1752 .type = QEMU_OPT_NUMBER,
1753 },
Kevin Wolfd4e79922016-12-08 14:23:08 +01001754 {
1755 .name = "initiator-name",
1756 .type = QEMU_OPT_STRING,
1757 },
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001758 {
1759 .name = "header-digest",
1760 .type = QEMU_OPT_STRING,
1761 },
Kevin Wolf1d560102016-12-08 14:23:10 +01001762 {
1763 .name = "timeout",
1764 .type = QEMU_OPT_NUMBER,
1765 },
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001766 { /* end of list */ }
1767 },
1768};
1769
Fam Zhengcc9743c2018-06-01 17:26:44 +08001770static void iscsi_save_designator(IscsiLun *lun,
1771 struct scsi_inquiry_device_identification *inq_di)
1772{
1773 struct scsi_inquiry_device_designator *desig, *copy = NULL;
1774
1775 for (desig = inq_di->designators; desig; desig = desig->next) {
1776 if (desig->association ||
1777 desig->designator_type > SCSI_DESIGNATOR_TYPE_NAA) {
1778 continue;
1779 }
1780 /* NAA works better than T10 vendor ID based designator. */
1781 if (!copy || copy->designator_type < desig->designator_type) {
1782 copy = desig;
1783 }
1784 }
1785 if (copy) {
1786 lun->dd = g_new(struct scsi_inquiry_device_designator, 1);
1787 *lun->dd = *copy;
1788 lun->dd->next = NULL;
1789 lun->dd->designator = g_malloc(copy->designator_length);
1790 memcpy(lun->dd->designator, copy->designator, copy->designator_length);
1791 }
1792}
1793
Max Reitz015a1032013-09-05 14:22:29 +02001794static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
1795 Error **errp)
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001796{
1797 IscsiLun *iscsilun = bs->opaque;
1798 struct iscsi_context *iscsi = NULL;
Peter Lievene829b0b2012-11-17 14:37:39 +01001799 struct scsi_task *task = NULL;
1800 struct scsi_inquiry_standard *inq = NULL;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001801 struct scsi_inquiry_supported_pages *inq_vpd;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001802 char *initiator_name = NULL;
Kevin Wolf60beb342013-04-12 17:59:59 +02001803 QemuOpts *opts;
1804 Error *local_err = NULL;
Markus Armbrusterdeadbb82018-06-14 21:14:27 +02001805 const char *transport_name, *portal, *target;
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001806#if LIBISCSI_API_VERSION >= (20160603)
1807 enum iscsi_transport_type transport;
1808#endif
1809 int i, ret = 0, timeout = 0, lun;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001810
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08001811 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
Markus Armbrusteraf175e82020-07-07 18:06:03 +02001812 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
Kevin Wolf60beb342013-04-12 17:59:59 +02001813 ret = -EINVAL;
1814 goto out;
1815 }
1816
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001817 transport_name = qemu_opt_get(opts, "transport");
1818 portal = qemu_opt_get(opts, "portal");
1819 target = qemu_opt_get(opts, "target");
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001820 lun = qemu_opt_get_number(opts, "lun", 0);
Kevin Wolf60beb342013-04-12 17:59:59 +02001821
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001822 if (!transport_name || !portal || !target) {
1823 error_setg(errp, "Need all of transport, portal and target options");
1824 ret = -EINVAL;
1825 goto out;
1826 }
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001827
1828 if (!strcmp(transport_name, "tcp")) {
1829#if LIBISCSI_API_VERSION >= (20160603)
1830 transport = TCP_TRANSPORT;
1831 } else if (!strcmp(transport_name, "iser")) {
1832 transport = ISER_TRANSPORT;
1833#else
1834 /* TCP is what older libiscsi versions always use */
1835#endif
1836 } else {
1837 error_setg(errp, "Unknown transport: %s", transport_name);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001838 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001839 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001840 }
1841
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001842 memset(iscsilun, 0, sizeof(IscsiLun));
1843
Kevin Wolfd4e79922016-12-08 14:23:08 +01001844 initiator_name = get_initiator_name(opts);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001845
1846 iscsi = iscsi_create_context(initiator_name);
1847 if (iscsi == NULL) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001848 error_setg(errp, "iSCSI: Failed to create iSCSI context.");
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001849 ret = -ENOMEM;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001850 goto out;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001851 }
Roy Shtermane0ae4982016-10-09 11:14:56 +03001852#if LIBISCSI_API_VERSION >= (20160603)
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001853 if (iscsi_init_transport(iscsi, transport)) {
Roy Shtermane0ae4982016-10-09 11:14:56 +03001854 error_setg(errp, ("Error initializing transport."));
1855 ret = -EINVAL;
1856 goto out;
1857 }
1858#endif
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001859 if (iscsi_set_targetname(iscsi, target)) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001860 error_setg(errp, "iSCSI: Failed to set target name.");
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001861 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001862 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001863 }
1864
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001865 /* check if we got CHAP username/password via the options */
Kevin Wolf43171422016-12-08 14:23:07 +01001866 apply_chap(iscsi, opts, &local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01001867 if (local_err != NULL) {
1868 error_propagate(errp, local_err);
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001869 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001870 goto out;
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001871 }
1872
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001873 if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001874 error_setg(errp, "iSCSI: Failed to set session type to normal.");
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001875 ret = -EINVAL;
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02001876 goto out;
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001877 }
1878
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001879 /* check if we got HEADER_DIGEST via the options */
Kevin Wolf81aa2a02016-12-08 14:23:09 +01001880 apply_header_digest(iscsi, opts, &local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01001881 if (local_err != NULL) {
1882 error_propagate(errp, local_err);
1883 ret = -EINVAL;
1884 goto out;
1885 }
Ronnie Sahlbergf9dadc92012-01-26 09:39:02 +11001886
Peter Lieven90497362015-06-26 12:18:01 +02001887 /* timeout handling is broken in libiscsi before 1.15.0 */
Kevin Wolf1d560102016-12-08 14:23:10 +01001888 timeout = qemu_opt_get_number(opts, "timeout", 0);
Roy Shterman583ec222016-10-09 11:14:55 +03001889#if LIBISCSI_API_VERSION >= 20150621
Peter Lieven90497362015-06-26 12:18:01 +02001890 iscsi_set_timeout(iscsi, timeout);
1891#else
1892 if (timeout) {
Markus Armbruster5197f442018-10-17 10:26:27 +02001893 warn_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
Peter Lieven90497362015-06-26 12:18:01 +02001894 }
1895#endif
Peter Lieven5dd7a532015-06-16 13:45:07 +02001896
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001897 if (iscsi_full_connect_sync(iscsi, portal, lun) != 0) {
Paolo Bonzinif2917852014-02-17 14:43:53 +01001898 error_setg(errp, "iSCSI: Failed to connect to LUN : %s",
Peter Lievene829b0b2012-11-17 14:37:39 +01001899 iscsi_get_error(iscsi));
1900 ret = -EINVAL;
1901 goto out;
1902 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11001903
1904 iscsilun->iscsi = iscsi;
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02001905 iscsilun->aio_context = bdrv_get_aio_context(bs);
Kevin Wolfd5895fc2016-12-08 14:23:06 +01001906 iscsilun->lun = lun;
Paolo Bonzinifa6252b2013-11-22 13:39:54 +01001907 iscsilun->has_write_same = true;
Peter Lievene829b0b2012-11-17 14:37:39 +01001908
Peter Lieven24d3bd62014-02-17 18:34:08 +01001909 task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0,
1910 (void **) &inq, errp);
1911 if (task == NULL) {
1912 ret = -EINVAL;
1913 goto out;
1914 }
1915 iscsilun->type = inq->periperal_device_type;
1916 scsi_free_scsi_task(task);
1917 task = NULL;
1918
Peter Lieven7191f202015-04-16 16:08:27 +02001919 iscsi_modesense_sync(iscsilun);
Eric Blake4df863f2016-05-03 16:39:06 -06001920 if (iscsilun->dpofua) {
1921 bs->supported_write_flags = BDRV_REQ_FUA;
1922 }
Peter Lieven7191f202015-04-16 16:08:27 +02001923
Fam Zhengc1d40962014-10-30 19:23:46 +08001924 /* Check the write protect flag of the LUN if we want to write */
1925 if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) &&
Fam Zheng43ae8fb2015-02-25 12:40:08 +08001926 iscsilun->write_protected) {
Kevin Wolf8f3bf502018-10-08 17:27:18 +02001927 ret = bdrv_apply_auto_read_only(bs, "LUN is write protected", errp);
1928 if (ret < 0) {
1929 goto out;
1930 }
1931 flags &= ~BDRV_O_RDWR;
Fam Zhengc1d40962014-10-30 19:23:46 +08001932 }
1933
Paolo Bonzinif2917852014-02-17 14:43:53 +01001934 iscsi_readcapacity_sync(iscsilun, &local_err);
1935 if (local_err != NULL) {
1936 error_propagate(errp, local_err);
Fam Zhengcd82b6f2014-04-10 09:33:55 +08001937 ret = -EINVAL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01001938 goto out;
Peter Lievene829b0b2012-11-17 14:37:39 +01001939 }
Peter Lieven0777b5d2013-07-11 14:16:25 +02001940 bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun);
Peter Lievene829b0b2012-11-17 14:37:39 +01001941
Kevin Wolff47c3f52014-03-05 15:45:00 +01001942 /* We don't have any emulation for devices other than disks and CD-ROMs, so
1943 * this must be sg ioctl compatible. We force it to be sg, otherwise qemu
1944 * will try to read from the device to guess the image format.
Ronnie Sahlberg622695a2012-05-26 14:56:41 +10001945 */
Kevin Wolff47c3f52014-03-05 15:45:00 +01001946 if (iscsilun->type != TYPE_DISK && iscsilun->type != TYPE_ROM) {
Eric Blake54115412016-06-23 16:37:26 -06001947 bs->sg = true;
Ronnie Sahlberg622695a2012-05-26 14:56:41 +10001948 }
1949
Peter Lieven24d3bd62014-02-17 18:34:08 +01001950 task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1951 SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES,
1952 (void **) &inq_vpd, errp);
1953 if (task == NULL) {
1954 ret = -EINVAL;
1955 goto out;
1956 }
1957 for (i = 0; i < inq_vpd->num_pages; i++) {
1958 struct scsi_task *inq_task;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001959 struct scsi_inquiry_logical_block_provisioning *inq_lbp;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02001960 struct scsi_inquiry_block_limits *inq_bl;
Fam Zhengcc9743c2018-06-01 17:26:44 +08001961 struct scsi_inquiry_device_identification *inq_di;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001962 switch (inq_vpd->pages[i]) {
1963 case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
1964 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1965 SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING,
1966 (void **) &inq_lbp, errp);
1967 if (inq_task == NULL) {
1968 ret = -EINVAL;
1969 goto out;
1970 }
1971 memcpy(&iscsilun->lbp, inq_lbp,
1972 sizeof(struct scsi_inquiry_logical_block_provisioning));
1973 scsi_free_scsi_task(inq_task);
1974 break;
1975 case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS:
1976 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1977 SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS,
1978 (void **) &inq_bl, errp);
1979 if (inq_task == NULL) {
1980 ret = -EINVAL;
1981 goto out;
1982 }
1983 memcpy(&iscsilun->bl, inq_bl,
1984 sizeof(struct scsi_inquiry_block_limits));
1985 scsi_free_scsi_task(inq_task);
1986 break;
Fam Zhengcc9743c2018-06-01 17:26:44 +08001987 case SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION:
1988 inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
1989 SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION,
1990 (void **) &inq_di, errp);
1991 if (inq_task == NULL) {
1992 ret = -EINVAL;
1993 goto out;
1994 }
1995 iscsi_save_designator(iscsilun, inq_di);
1996 scsi_free_scsi_task(inq_task);
1997 break;
Peter Lieven24d3bd62014-02-17 18:34:08 +01001998 default:
1999 break;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02002000 }
Peter Lievenf18a7cb2013-07-19 09:19:39 +02002001 }
Peter Lieven24d3bd62014-02-17 18:34:08 +01002002 scsi_free_scsi_task(task);
2003 task = NULL;
Peter Lievenf18a7cb2013-07-19 09:19:39 +02002004
Paolo Bonzinid045c462017-02-22 19:07:25 +01002005 qemu_mutex_init(&iscsilun->mutex);
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02002006 iscsi_attach_aio_context(bs, iscsilun->aio_context);
Peter Lieven5b5d34e2012-12-06 10:46:47 +01002007
Peter Lievenb03c3802014-04-28 13:11:32 +02002008 /* Guess the internal cluster (page) size of the iscsi target by the means
2009 * of opt_unmap_gran. Transfer the unmap granularity only if it has a
2010 * reasonable size */
Peter Lieven3d2acaa2014-04-28 17:18:32 +02002011 if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 &&
Peter Lievenb03c3802014-04-28 13:11:32 +02002012 iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) {
Eric Blakeba059e72018-02-13 14:26:46 -06002013 iscsilun->cluster_size = iscsilun->bl.opt_unmap_gran *
2014 iscsilun->block_size;
Peter Lieven9eac3622015-04-16 16:08:33 +02002015 if (iscsilun->lbprz) {
Chen Qun34afc5c2020-03-11 11:29:27 +08002016 ret = iscsi_allocmap_init(iscsilun, flags);
Peter Lievenb03c3802014-04-28 13:11:32 +02002017 }
Peter Lievenb03c3802014-04-28 13:11:32 +02002018 }
2019
Eric Blakee24d8132018-01-26 13:34:39 -06002020 if (iscsilun->lbprz && iscsilun->lbp.lbpws) {
2021 bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
2022 }
2023
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002024out:
Kevin Wolf60beb342013-04-12 17:59:59 +02002025 qemu_opts_del(opts);
Markus Armbrusterf7047c22014-06-06 18:25:12 +02002026 g_free(initiator_name);
Peter Lievene829b0b2012-11-17 14:37:39 +01002027 if (task != NULL) {
2028 scsi_free_scsi_task(task);
2029 }
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002030
2031 if (ret) {
2032 if (iscsi != NULL) {
Peter Lieven20474e92015-04-16 16:08:25 +02002033 if (iscsi_is_logged_in(iscsi)) {
2034 iscsi_logout_sync(iscsi);
2035 }
Paolo Bonzinib93c94f2012-08-06 10:52:22 +02002036 iscsi_destroy_context(iscsi);
2037 }
2038 memset(iscsilun, 0, sizeof(IscsiLun));
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002039 }
Markus Armbrusterdeadbb82018-06-14 21:14:27 +02002040
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002041 return ret;
2042}
2043
2044static void iscsi_close(BlockDriverState *bs)
2045{
2046 IscsiLun *iscsilun = bs->opaque;
2047 struct iscsi_context *iscsi = iscsilun->iscsi;
2048
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02002049 iscsi_detach_aio_context(bs);
Peter Lieven20474e92015-04-16 16:08:25 +02002050 if (iscsi_is_logged_in(iscsi)) {
2051 iscsi_logout_sync(iscsi);
2052 }
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002053 iscsi_destroy_context(iscsi);
Fam Zhengcc9743c2018-06-01 17:26:44 +08002054 if (iscsilun->dd) {
2055 g_free(iscsilun->dd->designator);
2056 g_free(iscsilun->dd);
2057 }
Peter Lievend4cd9612013-10-24 12:07:02 +02002058 g_free(iscsilun->zeroblock);
Peter Lievene1123a32016-07-18 10:52:20 +02002059 iscsi_allocmap_free(iscsilun);
Paolo Bonzinid045c462017-02-22 19:07:25 +01002060 qemu_mutex_destroy(&iscsilun->mutex);
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002061 memset(iscsilun, 0, sizeof(IscsiLun));
2062}
2063
Kevin Wolf3baca892014-07-16 17:48:16 +02002064static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
Kevin Wolfd34682c2013-12-11 19:26:16 +01002065{
Kevin Wolfd34682c2013-12-11 19:26:16 +01002066 /* We don't actually refresh here, but just return data queried in
2067 * iscsi_open(): iscsi targets don't change their limits. */
Peter Lieven52f6fa12014-10-27 10:18:45 +01002068
2069 IscsiLun *iscsilun = bs->opaque;
Eric Blake5def6b82016-06-23 16:37:19 -06002070 uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff;
Eric Blake95eaa782016-09-07 16:27:20 -05002071 unsigned int block_size = MAX(BDRV_SECTOR_SIZE, iscsilun->block_size);
Peter Lieven52f6fa12014-10-27 10:18:45 +01002072
Denis V. Lunev006e1962022-08-17 10:37:35 +02002073 assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bdrv_is_sg(bs));
Eric Blake95eaa782016-09-07 16:27:20 -05002074
2075 bs->bl.request_alignment = block_size;
Eric Blakec8b3b992016-06-23 16:37:14 -06002076
Peter Lieven52f6fa12014-10-27 10:18:45 +01002077 if (iscsilun->bl.max_xfer_len) {
2078 max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len);
2079 }
2080
Eric Blake95eaa782016-09-07 16:27:20 -05002081 if (max_xfer_len * block_size < INT_MAX) {
Eric Blake5def6b82016-06-23 16:37:19 -06002082 bs->bl.max_transfer = max_xfer_len * iscsilun->block_size;
2083 }
Peter Lieven52f6fa12014-10-27 10:18:45 +01002084
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002085 if (iscsilun->lbp.lbpu) {
Vladimir Sementsov-Ogievskiy0c802282021-09-03 13:28:06 +03002086 bs->bl.max_pdiscard =
2087 MIN_NON_ZERO(iscsilun->bl.max_unmap * iscsilun->block_size,
2088 (uint64_t)UINT32_MAX * iscsilun->block_size);
Eric Blakeb9f78552016-06-23 16:37:21 -06002089 bs->bl.pdiscard_alignment =
2090 iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
Eric Blake8b184742016-06-01 15:10:01 -06002091 } else {
Eric Blakeb9f78552016-06-23 16:37:21 -06002092 bs->bl.pdiscard_alignment = iscsilun->block_size;
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002093 }
Kevin Wolfd34682c2013-12-11 19:26:16 +01002094
Vladimir Sementsov-Ogievskiyf34b2bc2021-09-03 13:28:03 +03002095 bs->bl.max_pwrite_zeroes =
2096 MIN_NON_ZERO(iscsilun->bl.max_ws_len * iscsilun->block_size,
2097 max_xfer_len * iscsilun->block_size);
2098
Paolo Bonzinic97ca292014-04-02 15:30:29 +02002099 if (iscsilun->lbp.lbpws) {
Eric Blakecf081fc2016-06-01 15:10:02 -06002100 bs->bl.pwrite_zeroes_alignment =
2101 iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
Eric Blake8b184742016-06-01 15:10:01 -06002102 } else {
Eric Blakecf081fc2016-06-01 15:10:02 -06002103 bs->bl.pwrite_zeroes_alignment = iscsilun->block_size;
Kevin Wolfd34682c2013-12-11 19:26:16 +01002104 }
Eric Blake5def6b82016-06-23 16:37:19 -06002105 if (iscsilun->bl.opt_xfer_len &&
Eric Blake95eaa782016-09-07 16:27:20 -05002106 iscsilun->bl.opt_xfer_len < INT_MAX / block_size) {
Eric Blake5def6b82016-06-23 16:37:19 -06002107 bs->bl.opt_transfer = pow2floor(iscsilun->bl.opt_xfer_len *
2108 iscsilun->block_size);
2109 }
Anthony Liguorie9f526a2014-01-24 15:50:14 -08002110}
Kevin Wolfd34682c2013-12-11 19:26:16 +01002111
Fam Zheng43ae8fb2015-02-25 12:40:08 +08002112/* Note that this will not re-establish a connection with an iSCSI target - it
2113 * is effectively a NOP. */
Jeff Codydc6afb92014-01-14 13:10:24 -05002114static int iscsi_reopen_prepare(BDRVReopenState *state,
2115 BlockReopenQueue *queue, Error **errp)
2116{
Fam Zheng43ae8fb2015-02-25 12:40:08 +08002117 IscsiLun *iscsilun = state->bs->opaque;
2118
2119 if (state->flags & BDRV_O_RDWR && iscsilun->write_protected) {
2120 error_setg(errp, "Cannot open a write protected LUN as read-write");
2121 return -EACCES;
2122 }
Kevin Wolfd34682c2013-12-11 19:26:16 +01002123 return 0;
2124}
2125
Peter Lievene1123a32016-07-18 10:52:20 +02002126static void iscsi_reopen_commit(BDRVReopenState *reopen_state)
2127{
2128 IscsiLun *iscsilun = reopen_state->bs->opaque;
2129
2130 /* the cache.direct status might have changed */
2131 if (iscsilun->allocmap != NULL) {
2132 iscsi_allocmap_init(iscsilun, reopen_state->flags);
2133 }
2134}
2135
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002136static int coroutine_fn iscsi_co_truncate(BlockDriverState *bs, int64_t offset,
Max Reitzc80d8b02019-09-18 11:51:40 +02002137 bool exact, PreallocMode prealloc,
Kevin Wolf92b92792020-04-24 14:54:39 +02002138 BdrvRequestFlags flags, Error **errp)
Peter Lievencb1b83e2013-02-18 14:50:46 +01002139{
2140 IscsiLun *iscsilun = bs->opaque;
Max Reitz82325ae2019-09-18 11:51:41 +02002141 int64_t cur_length;
Paolo Bonzinif2917852014-02-17 14:43:53 +01002142 Error *local_err = NULL;
Peter Lievencb1b83e2013-02-18 14:50:46 +01002143
Max Reitz8243ccb2017-06-13 22:20:52 +02002144 if (prealloc != PREALLOC_MODE_OFF) {
2145 error_setg(errp, "Unsupported preallocation mode '%s'",
Markus Armbruster977c7362017-08-24 10:46:08 +02002146 PreallocMode_str(prealloc));
Max Reitz8243ccb2017-06-13 22:20:52 +02002147 return -ENOTSUP;
2148 }
2149
Peter Lievencb1b83e2013-02-18 14:50:46 +01002150 if (iscsilun->type != TYPE_DISK) {
Max Reitzf59adb32017-03-28 22:51:29 +02002151 error_setg(errp, "Cannot resize non-disk iSCSI devices");
Peter Lievencb1b83e2013-02-18 14:50:46 +01002152 return -ENOTSUP;
2153 }
2154
Paolo Bonzinif2917852014-02-17 14:43:53 +01002155 iscsi_readcapacity_sync(iscsilun, &local_err);
2156 if (local_err != NULL) {
Max Reitz4bff28b2017-03-28 22:51:28 +02002157 error_propagate(errp, local_err);
Paolo Bonzinif2917852014-02-17 14:43:53 +01002158 return -EIO;
Peter Lievencb1b83e2013-02-18 14:50:46 +01002159 }
2160
Emanuele Giuseppe Espositoc86422c2023-01-13 21:42:04 +01002161 cur_length = iscsi_co_getlength(bs);
Max Reitz82325ae2019-09-18 11:51:41 +02002162 if (offset != cur_length && exact) {
2163 error_setg(errp, "Cannot resize iSCSI devices");
2164 return -ENOTSUP;
2165 } else if (offset > cur_length) {
Max Reitzf59adb32017-03-28 22:51:29 +02002166 error_setg(errp, "Cannot grow iSCSI devices");
Peter Lievencb1b83e2013-02-18 14:50:46 +01002167 return -EINVAL;
2168 }
2169
Peter Lievene1123a32016-07-18 10:52:20 +02002170 if (iscsilun->allocmap != NULL) {
2171 iscsi_allocmap_init(iscsilun, bs->open_flags);
Peter Lievenb03c3802014-04-28 13:11:32 +02002172 }
2173
Peter Lievencb1b83e2013-02-18 14:50:46 +01002174 return 0;
2175}
2176
Emanuele Giuseppe Esposito3d47eb02023-01-13 21:42:08 +01002177static int coroutine_fn
2178iscsi_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
Peter Lieven186d4f22013-10-24 12:06:55 +02002179{
2180 IscsiLun *iscsilun = bs->opaque;
Eric Blakeba059e72018-02-13 14:26:46 -06002181 bdi->cluster_size = iscsilun->cluster_size;
Peter Lieven186d4f22013-10-24 12:06:55 +02002182 return 0;
2183}
2184
Paolo Bonzini2b148f32018-03-01 17:36:18 +01002185static void coroutine_fn iscsi_co_invalidate_cache(BlockDriverState *bs,
2186 Error **errp)
Peter Lievene1123a32016-07-18 10:52:20 +02002187{
2188 IscsiLun *iscsilun = bs->opaque;
2189 iscsi_allocmap_invalidate(iscsilun);
2190}
2191
Emanuele Giuseppe Esposito742bf092023-02-03 16:21:53 +01002192static int coroutine_fn GRAPH_RDLOCK
2193iscsi_co_copy_range_from(BlockDriverState *bs,
2194 BdrvChild *src, int64_t src_offset,
2195 BdrvChild *dst, int64_t dst_offset,
2196 int64_t bytes, BdrvRequestFlags read_flags,
2197 BdrvRequestFlags write_flags)
Fam Zheng604dfaa2018-06-01 17:26:46 +08002198{
Vladimir Sementsov-Ogievskiy67b51fb2018-07-09 19:37:17 +03002199 return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes,
2200 read_flags, write_flags);
Fam Zheng604dfaa2018-06-01 17:26:46 +08002201}
2202
2203static struct scsi_task *iscsi_xcopy_task(int param_len)
2204{
2205 struct scsi_task *task;
2206
2207 task = g_new0(struct scsi_task, 1);
2208
2209 task->cdb[0] = EXTENDED_COPY;
2210 task->cdb[10] = (param_len >> 24) & 0xFF;
2211 task->cdb[11] = (param_len >> 16) & 0xFF;
2212 task->cdb[12] = (param_len >> 8) & 0xFF;
2213 task->cdb[13] = param_len & 0xFF;
2214 task->cdb_size = 16;
2215 task->xfer_dir = SCSI_XFER_WRITE;
2216 task->expxferlen = param_len;
2217
2218 return task;
2219}
2220
2221static void iscsi_populate_target_desc(unsigned char *desc, IscsiLun *lun)
2222{
2223 struct scsi_inquiry_device_designator *dd = lun->dd;
2224
2225 memset(desc, 0, 32);
2226 desc[0] = 0xE4; /* IDENT_DESCR_TGT_DESCR */
2227 desc[4] = dd->code_set;
2228 desc[5] = (dd->designator_type & 0xF)
2229 | ((dd->association & 3) << 4);
2230 desc[7] = dd->designator_length;
Fam Zheng1439b9c2018-06-29 14:03:27 +08002231 memcpy(desc + 8, dd->designator, MIN(dd->designator_length, 20));
Fam Zheng604dfaa2018-06-01 17:26:46 +08002232
2233 desc[28] = 0;
2234 desc[29] = (lun->block_size >> 16) & 0xFF;
2235 desc[30] = (lun->block_size >> 8) & 0xFF;
2236 desc[31] = lun->block_size & 0xFF;
2237}
2238
2239static void iscsi_xcopy_desc_hdr(uint8_t *hdr, int dc, int cat, int src_index,
2240 int dst_index)
2241{
2242 hdr[0] = 0x02; /* BLK_TO_BLK_SEG_DESCR */
2243 hdr[1] = ((dc << 1) | cat) & 0xFF;
2244 hdr[2] = (XCOPY_BLK2BLK_SEG_DESC_SIZE >> 8) & 0xFF;
2245 /* don't account for the first 4 bytes in descriptor header*/
2246 hdr[3] = (XCOPY_BLK2BLK_SEG_DESC_SIZE - 4 /* SEG_DESC_SRC_INDEX_OFFSET */) & 0xFF;
2247 hdr[4] = (src_index >> 8) & 0xFF;
2248 hdr[5] = src_index & 0xFF;
2249 hdr[6] = (dst_index >> 8) & 0xFF;
2250 hdr[7] = dst_index & 0xFF;
2251}
2252
2253static void iscsi_xcopy_populate_desc(uint8_t *desc, int dc, int cat,
2254 int src_index, int dst_index, int num_blks,
2255 uint64_t src_lba, uint64_t dst_lba)
2256{
2257 iscsi_xcopy_desc_hdr(desc, dc, cat, src_index, dst_index);
2258
2259 /* The caller should verify the request size */
2260 assert(num_blks < 65536);
2261 desc[10] = (num_blks >> 8) & 0xFF;
2262 desc[11] = num_blks & 0xFF;
2263 desc[12] = (src_lba >> 56) & 0xFF;
2264 desc[13] = (src_lba >> 48) & 0xFF;
2265 desc[14] = (src_lba >> 40) & 0xFF;
2266 desc[15] = (src_lba >> 32) & 0xFF;
2267 desc[16] = (src_lba >> 24) & 0xFF;
2268 desc[17] = (src_lba >> 16) & 0xFF;
2269 desc[18] = (src_lba >> 8) & 0xFF;
2270 desc[19] = src_lba & 0xFF;
2271 desc[20] = (dst_lba >> 56) & 0xFF;
2272 desc[21] = (dst_lba >> 48) & 0xFF;
2273 desc[22] = (dst_lba >> 40) & 0xFF;
2274 desc[23] = (dst_lba >> 32) & 0xFF;
2275 desc[24] = (dst_lba >> 24) & 0xFF;
2276 desc[25] = (dst_lba >> 16) & 0xFF;
2277 desc[26] = (dst_lba >> 8) & 0xFF;
2278 desc[27] = dst_lba & 0xFF;
2279}
2280
2281static void iscsi_xcopy_populate_header(unsigned char *buf, int list_id, int str,
2282 int list_id_usage, int prio,
2283 int tgt_desc_len,
2284 int seg_desc_len, int inline_data_len)
2285{
2286 buf[0] = list_id;
2287 buf[1] = ((str & 1) << 5) | ((list_id_usage & 3) << 3) | (prio & 7);
2288 buf[2] = (tgt_desc_len >> 8) & 0xFF;
2289 buf[3] = tgt_desc_len & 0xFF;
2290 buf[8] = (seg_desc_len >> 24) & 0xFF;
2291 buf[9] = (seg_desc_len >> 16) & 0xFF;
2292 buf[10] = (seg_desc_len >> 8) & 0xFF;
2293 buf[11] = seg_desc_len & 0xFF;
2294 buf[12] = (inline_data_len >> 24) & 0xFF;
2295 buf[13] = (inline_data_len >> 16) & 0xFF;
2296 buf[14] = (inline_data_len >> 8) & 0xFF;
2297 buf[15] = inline_data_len & 0xFF;
2298}
2299
2300static void iscsi_xcopy_data(struct iscsi_data *data,
2301 IscsiLun *src, int64_t src_lba,
2302 IscsiLun *dst, int64_t dst_lba,
2303 uint16_t num_blocks)
2304{
2305 uint8_t *buf;
2306 const int src_offset = XCOPY_DESC_OFFSET;
2307 const int dst_offset = XCOPY_DESC_OFFSET + IDENT_DESCR_TGT_DESCR_SIZE;
2308 const int seg_offset = dst_offset + IDENT_DESCR_TGT_DESCR_SIZE;
2309
2310 data->size = XCOPY_DESC_OFFSET +
2311 IDENT_DESCR_TGT_DESCR_SIZE * 2 +
2312 XCOPY_BLK2BLK_SEG_DESC_SIZE;
2313 data->data = g_malloc0(data->size);
2314 buf = data->data;
2315
2316 /* Initialise the parameter list header */
2317 iscsi_xcopy_populate_header(buf, 1, 0, 2 /* LIST_ID_USAGE_DISCARD */,
2318 0, 2 * IDENT_DESCR_TGT_DESCR_SIZE,
2319 XCOPY_BLK2BLK_SEG_DESC_SIZE,
2320 0);
2321
2322 /* Initialise CSCD list with one src + one dst descriptor */
2323 iscsi_populate_target_desc(&buf[src_offset], src);
2324 iscsi_populate_target_desc(&buf[dst_offset], dst);
2325
2326 /* Initialise one segment descriptor */
2327 iscsi_xcopy_populate_desc(&buf[seg_offset], 0, 0, 0, 1, num_blocks,
2328 src_lba, dst_lba);
2329}
2330
Emanuele Giuseppe Esposito742bf092023-02-03 16:21:53 +01002331static int coroutine_fn GRAPH_RDLOCK
2332iscsi_co_copy_range_to(BlockDriverState *bs,
2333 BdrvChild *src, int64_t src_offset,
2334 BdrvChild *dst, int64_t dst_offset,
2335 int64_t bytes, BdrvRequestFlags read_flags,
2336 BdrvRequestFlags write_flags)
Fam Zheng604dfaa2018-06-01 17:26:46 +08002337{
2338 IscsiLun *dst_lun = dst->bs->opaque;
2339 IscsiLun *src_lun;
2340 struct IscsiTask iscsi_task;
2341 struct iscsi_data data;
2342 int r = 0;
2343 int block_size;
2344
2345 if (src->bs->drv->bdrv_co_copy_range_to != iscsi_co_copy_range_to) {
2346 return -ENOTSUP;
2347 }
2348 src_lun = src->bs->opaque;
2349
2350 if (!src_lun->dd || !dst_lun->dd) {
2351 return -ENOTSUP;
2352 }
2353 if (!is_byte_request_lun_aligned(dst_offset, bytes, dst_lun)) {
2354 return -ENOTSUP;
2355 }
2356 if (!is_byte_request_lun_aligned(src_offset, bytes, src_lun)) {
2357 return -ENOTSUP;
2358 }
2359 if (dst_lun->block_size != src_lun->block_size ||
2360 !dst_lun->block_size) {
2361 return -ENOTSUP;
2362 }
2363
2364 block_size = dst_lun->block_size;
2365 if (bytes / block_size > 65535) {
2366 return -ENOTSUP;
2367 }
2368
2369 iscsi_xcopy_data(&data,
2370 src_lun, src_offset / block_size,
2371 dst_lun, dst_offset / block_size,
2372 bytes / block_size);
2373
2374 iscsi_co_init_iscsitask(dst_lun, &iscsi_task);
2375
2376 qemu_mutex_lock(&dst_lun->mutex);
2377 iscsi_task.task = iscsi_xcopy_task(data.size);
2378retry:
2379 if (iscsi_scsi_command_async(dst_lun->iscsi, dst_lun->lun,
2380 iscsi_task.task, iscsi_co_generic_cb,
2381 &data,
2382 &iscsi_task) != 0) {
2383 r = -EIO;
2384 goto out_unlock;
2385 }
2386
2387 iscsi_co_wait_for_task(&iscsi_task, dst_lun);
2388
2389 if (iscsi_task.do_retry) {
2390 iscsi_task.complete = 0;
2391 goto retry;
2392 }
2393
2394 if (iscsi_task.status != SCSI_STATUS_GOOD) {
2395 r = iscsi_task.err_code;
2396 goto out_unlock;
2397 }
2398
2399out_unlock:
Fam Zhengecc983a2018-07-10 14:31:16 +08002400
2401 trace_iscsi_xcopy(src_lun, src_offset, dst_lun, dst_offset, bytes, r);
Fam Zheng604dfaa2018-06-01 17:26:46 +08002402 g_free(iscsi_task.task);
2403 qemu_mutex_unlock(&dst_lun->mutex);
2404 g_free(iscsi_task.err_str);
2405 return r;
2406}
2407
Peter Lievende8864e2012-11-17 16:13:24 +01002408
Max Reitz26542672019-02-01 20:29:25 +01002409static const char *const iscsi_strong_runtime_opts[] = {
2410 "transport",
2411 "portal",
2412 "target",
2413 "user",
2414 "password",
2415 "password-secret",
2416 "lun",
2417 "initiator-name",
2418 "header-digest",
2419
2420 NULL
2421};
2422
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002423static BlockDriver bdrv_iscsi = {
2424 .format_name = "iscsi",
2425 .protocol_name = "iscsi",
2426
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002427 .instance_size = sizeof(IscsiLun),
2428 .bdrv_parse_filename = iscsi_parse_filename,
2429 .bdrv_file_open = iscsi_open,
2430 .bdrv_close = iscsi_close,
Maxim Levitsky5a5e7f82020-03-26 03:12:18 +02002431 .bdrv_co_create_opts = bdrv_co_create_opts_simple,
2432 .create_opts = &bdrv_create_opts_simple,
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002433 .bdrv_reopen_prepare = iscsi_reopen_prepare,
2434 .bdrv_reopen_commit = iscsi_reopen_commit,
Paolo Bonzini2b148f32018-03-01 17:36:18 +01002435 .bdrv_co_invalidate_cache = iscsi_co_invalidate_cache,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002436
Emanuele Giuseppe Espositoc86422c2023-01-13 21:42:04 +01002437 .bdrv_co_getlength = iscsi_co_getlength,
Emanuele Giuseppe Esposito3d47eb02023-01-13 21:42:08 +01002438 .bdrv_co_get_info = iscsi_co_get_info,
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002439 .bdrv_co_truncate = iscsi_co_truncate,
Kevin Wolfd34682c2013-12-11 19:26:16 +01002440 .bdrv_refresh_limits = iscsi_refresh_limits,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002441
Eric Blake92809c32018-02-13 14:26:48 -06002442 .bdrv_co_block_status = iscsi_co_block_status,
Eric Blake97c7e852016-07-15 17:23:01 -06002443 .bdrv_co_pdiscard = iscsi_co_pdiscard,
Fam Zheng604dfaa2018-06-01 17:26:46 +08002444 .bdrv_co_copy_range_from = iscsi_co_copy_range_from,
2445 .bdrv_co_copy_range_to = iscsi_co_copy_range_to,
Eric Blake94d047a2016-06-01 15:10:05 -06002446 .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes,
Peter Lieven063c3372013-12-05 16:47:17 +01002447 .bdrv_co_readv = iscsi_co_readv,
Eric Blakee18a58b2018-04-24 17:01:57 -05002448 .bdrv_co_writev = iscsi_co_writev,
Peter Lieven063c3372013-12-05 16:47:17 +01002449 .bdrv_co_flush_to_disk = iscsi_co_flush,
Ronnie Sahlbergfa6acb02012-04-24 16:29:04 +10002450
Ronnie Sahlberg98392452012-05-25 21:59:01 +10002451#ifdef __linux__
Ronnie Sahlberg98392452012-05-25 21:59:01 +10002452 .bdrv_aio_ioctl = iscsi_aio_ioctl,
2453#endif
Stefan Hajnoczi80cf6252014-05-08 16:34:42 +02002454
2455 .bdrv_detach_aio_context = iscsi_detach_aio_context,
2456 .bdrv_attach_aio_context = iscsi_attach_aio_context,
Max Reitz26542672019-02-01 20:29:25 +01002457
2458 .strong_runtime_opts = iscsi_strong_runtime_opts,
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002459};
2460
Roy Shtermane0ae4982016-10-09 11:14:56 +03002461#if LIBISCSI_API_VERSION >= (20160603)
2462static BlockDriver bdrv_iser = {
2463 .format_name = "iser",
2464 .protocol_name = "iser",
2465
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002466 .instance_size = sizeof(IscsiLun),
2467 .bdrv_parse_filename = iscsi_parse_filename,
2468 .bdrv_file_open = iscsi_open,
2469 .bdrv_close = iscsi_close,
Maxim Levitsky5a5e7f82020-03-26 03:12:18 +02002470 .bdrv_co_create_opts = bdrv_co_create_opts_simple,
2471 .create_opts = &bdrv_create_opts_simple,
Kevin Wolfd5895fc2016-12-08 14:23:06 +01002472 .bdrv_reopen_prepare = iscsi_reopen_prepare,
2473 .bdrv_reopen_commit = iscsi_reopen_commit,
Paolo Bonzinib16a7cf2018-03-15 15:30:56 +01002474 .bdrv_co_invalidate_cache = iscsi_co_invalidate_cache,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002475
Emanuele Giuseppe Espositoc86422c2023-01-13 21:42:04 +01002476 .bdrv_co_getlength = iscsi_co_getlength,
Emanuele Giuseppe Esposito3d47eb02023-01-13 21:42:08 +01002477 .bdrv_co_get_info = iscsi_co_get_info,
Kevin Wolf061ca8a2018-06-21 17:54:35 +02002478 .bdrv_co_truncate = iscsi_co_truncate,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002479 .bdrv_refresh_limits = iscsi_refresh_limits,
2480
Eric Blake92809c32018-02-13 14:26:48 -06002481 .bdrv_co_block_status = iscsi_co_block_status,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002482 .bdrv_co_pdiscard = iscsi_co_pdiscard,
Fam Zheng604dfaa2018-06-01 17:26:46 +08002483 .bdrv_co_copy_range_from = iscsi_co_copy_range_from,
2484 .bdrv_co_copy_range_to = iscsi_co_copy_range_to,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002485 .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes,
2486 .bdrv_co_readv = iscsi_co_readv,
Eric Blakee18a58b2018-04-24 17:01:57 -05002487 .bdrv_co_writev = iscsi_co_writev,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002488 .bdrv_co_flush_to_disk = iscsi_co_flush,
2489
2490#ifdef __linux__
2491 .bdrv_aio_ioctl = iscsi_aio_ioctl,
2492#endif
2493
2494 .bdrv_detach_aio_context = iscsi_detach_aio_context,
2495 .bdrv_attach_aio_context = iscsi_attach_aio_context,
Max Reitz26542672019-02-01 20:29:25 +01002496
2497 .strong_runtime_opts = iscsi_strong_runtime_opts,
Roy Shtermane0ae4982016-10-09 11:14:56 +03002498};
2499#endif
2500
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002501static void iscsi_block_init(void)
2502{
2503 bdrv_register(&bdrv_iscsi);
Roy Shtermane0ae4982016-10-09 11:14:56 +03002504#if LIBISCSI_API_VERSION >= (20160603)
2505 bdrv_register(&bdrv_iser);
2506#endif
Ronnie Sahlbergc589b242011-10-25 19:24:24 +11002507}
2508
2509block_init(iscsi_block_init);