2 * QEMU Block driver for Veritas HyperScale (VxHS)
4 * Copyright (c) 2017 Veritas Technologies LLC.
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
11 #include "qemu/osdep.h"
12 #include <qnio/qnio_api.h>
13 #include <sys/param.h>
14 #include "block/block_int.h"
15 #include "qapi/qmp/qerror.h"
16 #include "qapi/qmp/qdict.h"
17 #include "qapi/qmp/qstring.h"
20 #include "qapi/error.h"
21 #include "qemu/uuid.h"
22 #include "crypto/tlscredsx509.h"
24 #define VXHS_OPT_FILENAME "filename"
25 #define VXHS_OPT_VDISK_ID "vdisk-id"
26 #define VXHS_OPT_SERVER "server"
27 #define VXHS_OPT_HOST "host"
28 #define VXHS_OPT_PORT "port"
30 /* Only accessed under QEMU global mutex */
31 static uint32_t vxhs_ref;
39 * HyperScale AIO callbacks structure
41 typedef struct VXHSAIOCB {
46 typedef struct VXHSvDiskHostsInfo {
47 void *dev_handle; /* Device handle */
48 char *host; /* Host name or IP */
49 int port; /* Host's port number */
53 * Structure per vDisk maintained for state
55 typedef struct BDRVVXHSState {
56 VXHSvDiskHostsInfo vdisk_hostinfo; /* Per host info */
58 char *tlscredsid; /* tlscredsid */
61 static void vxhs_complete_aio_bh(void *opaque)
63 VXHSAIOCB *acb = opaque;
64 BlockCompletionFunc *cb = acb->common.cb;
65 void *cb_opaque = acb->common.opaque;
69 trace_vxhs_complete_aio(acb, acb->err);
78 * Called from a libqnio thread
80 static void vxhs_iio_callback(void *ctx, uint32_t opcode, uint32_t error)
82 VXHSAIOCB *acb = NULL;
85 case IRP_READ_REQUEST:
86 case IRP_WRITE_REQUEST:
90 * ctx is NULL if error is QNIOERROR_CHANNEL_HUP
95 trace_vxhs_iio_callback(error);
103 trace_vxhs_iio_callback(error);
106 aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs),
107 vxhs_complete_aio_bh, acb);
111 if (error == QNIOERROR_HUP) {
113 * Channel failed, spontaneous notification,
114 * not in response to I/O
116 trace_vxhs_iio_callback_chnfail(error, errno);
118 trace_vxhs_iio_callback_unknwn(opcode, error);
126 static QemuOptsList runtime_opts = {
128 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
131 .name = VXHS_OPT_FILENAME,
132 .type = QEMU_OPT_STRING,
133 .help = "URI to the Veritas HyperScale image",
136 .name = VXHS_OPT_VDISK_ID,
137 .type = QEMU_OPT_STRING,
138 .help = "UUID of the VxHS vdisk",
142 .type = QEMU_OPT_STRING,
143 .help = "ID of the TLS/SSL credentials to use",
145 { /* end of list */ }
149 static QemuOptsList runtime_tcp_opts = {
151 .head = QTAILQ_HEAD_INITIALIZER(runtime_tcp_opts.head),
154 .name = VXHS_OPT_HOST,
155 .type = QEMU_OPT_STRING,
156 .help = "host address (ipv4 addresses)",
159 .name = VXHS_OPT_PORT,
160 .type = QEMU_OPT_NUMBER,
161 .help = "port number on which VxHSD is listening (default 9999)",
162 .def_value_str = "9999"
164 { /* end of list */ }
169 * Parse incoming URI and populate *options with the host
170 * and device information
172 static int vxhs_parse_uri(const char *filename, QDict *options)
178 trace_vxhs_parse_uri_filename(filename);
179 uri = uri_parse(filename);
180 if (!uri || !uri->server || !uri->path) {
185 qdict_put_str(options, VXHS_OPT_SERVER ".host", uri->server);
188 port = g_strdup_printf("%d", uri->port);
189 qdict_put_str(options, VXHS_OPT_SERVER ".port", port);
193 qdict_put_str(options, "vdisk-id", uri->path);
195 trace_vxhs_parse_uri_hostinfo(uri->server, uri->port);
201 static void vxhs_parse_filename(const char *filename, QDict *options,
204 if (qdict_haskey(options, "vdisk-id") || qdict_haskey(options, "server")) {
205 error_setg(errp, "vdisk-id/server and a file name may not be specified "
210 if (strstr(filename, "://")) {
211 int ret = vxhs_parse_uri(filename, options);
213 error_setg(errp, "Invalid URI. URI should be of the form "
214 " vxhs://<host_ip>:<port>/<vdisk-id>");
219 static void vxhs_refresh_limits(BlockDriverState *bs, Error **errp)
221 /* XXX Does VXHS support AIO on less than 512-byte alignment? */
222 bs->bl.request_alignment = 512;
225 static int vxhs_init_and_ref(void)
227 if (vxhs_ref++ == 0) {
228 if (iio_init(QNIO_VERSION, vxhs_iio_callback)) {
235 static void vxhs_unref(void)
237 if (--vxhs_ref == 0) {
242 static void vxhs_get_tls_creds(const char *id, char **cacert,
243 char **key, char **cert, Error **errp)
246 QCryptoTLSCreds *creds;
247 QCryptoTLSCredsX509 *creds_x509;
249 obj = object_resolve_path_component(
250 object_get_objects_root(), id);
253 error_setg(errp, "No TLS credentials with id '%s'",
258 creds_x509 = (QCryptoTLSCredsX509 *)
259 object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS_X509);
262 error_setg(errp, "Object with id '%s' is not TLS credentials",
267 creds = &creds_x509->parent_obj;
269 if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
271 "Expecting TLS credentials with a client endpoint");
276 * Get the cacert, client_cert and client_key file names.
279 error_setg(errp, "TLS object missing 'dir' property value");
283 *cacert = g_strdup_printf("%s/%s", creds->dir,
284 QCRYPTO_TLS_CREDS_X509_CA_CERT);
285 *cert = g_strdup_printf("%s/%s", creds->dir,
286 QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
287 *key = g_strdup_printf("%s/%s", creds->dir,
288 QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
291 static int vxhs_open(BlockDriverState *bs, QDict *options,
292 int bdrv_flags, Error **errp)
294 BDRVVXHSState *s = bs->opaque;
296 QDict *backing_options = NULL;
297 QemuOpts *opts = NULL;
298 QemuOpts *tcp_opts = NULL;
299 char *of_vsa_addr = NULL;
300 Error *local_err = NULL;
301 const char *vdisk_id_opt;
302 const char *server_host_opt;
305 char *client_key = NULL;
306 char *client_cert = NULL;
308 ret = vxhs_init_and_ref();
314 /* Create opts info from runtime_opts and runtime_tcp_opts list */
315 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
316 tcp_opts = qemu_opts_create(&runtime_tcp_opts, NULL, 0, &error_abort);
318 qemu_opts_absorb_qdict(opts, options, &local_err);
324 /* vdisk-id is the disk UUID */
325 vdisk_id_opt = qemu_opt_get(opts, VXHS_OPT_VDISK_ID);
327 error_setg(&local_err, QERR_MISSING_PARAMETER, VXHS_OPT_VDISK_ID);
332 /* vdisk-id may contain a leading '/' */
333 if (strlen(vdisk_id_opt) > UUID_FMT_LEN + 1) {
334 error_setg(&local_err, "vdisk-id cannot be more than %d characters",
340 s->vdisk_guid = g_strdup(vdisk_id_opt);
341 trace_vxhs_open_vdiskid(vdisk_id_opt);
343 /* get the 'server.' arguments */
344 qdict_extract_subqdict(options, &backing_options, VXHS_OPT_SERVER".");
346 qemu_opts_absorb_qdict(tcp_opts, backing_options, &local_err);
347 if (local_err != NULL) {
352 server_host_opt = qemu_opt_get(tcp_opts, VXHS_OPT_HOST);
353 if (!server_host_opt) {
354 error_setg(&local_err, QERR_MISSING_PARAMETER,
355 VXHS_OPT_SERVER"."VXHS_OPT_HOST);
360 if (strlen(server_host_opt) > MAXHOSTNAMELEN) {
361 error_setg(&local_err, "server.host cannot be more than %d characters",
367 /* check if we got tls-creds via the --object argument */
368 s->tlscredsid = g_strdup(qemu_opt_get(opts, "tls-creds"));
370 vxhs_get_tls_creds(s->tlscredsid, &cacert, &client_key,
371 &client_cert, &local_err);
372 if (local_err != NULL) {
376 trace_vxhs_get_creds(cacert, client_key, client_cert);
379 s->vdisk_hostinfo.host = g_strdup(server_host_opt);
380 s->vdisk_hostinfo.port = g_ascii_strtoll(qemu_opt_get(tcp_opts,
384 trace_vxhs_open_hostinfo(s->vdisk_hostinfo.host,
385 s->vdisk_hostinfo.port);
387 of_vsa_addr = g_strdup_printf("of://%s:%d",
388 s->vdisk_hostinfo.host,
389 s->vdisk_hostinfo.port);
392 * Open qnio channel to storage agent if not opened before
394 dev_handlep = iio_open(of_vsa_addr, s->vdisk_guid, 0,
395 cacert, client_key, client_cert);
396 if (dev_handlep == NULL) {
397 trace_vxhs_open_iio_open(of_vsa_addr);
401 s->vdisk_hostinfo.dev_handle = dev_handlep;
405 qobject_unref(backing_options);
406 qemu_opts_del(tcp_opts);
414 error_propagate(errp, local_err);
415 g_free(s->vdisk_hostinfo.host);
416 g_free(s->vdisk_guid);
417 g_free(s->tlscredsid);
418 s->vdisk_guid = NULL;
424 static const AIOCBInfo vxhs_aiocb_info = {
425 .aiocb_size = sizeof(VXHSAIOCB)
429 * This allocates QEMU-VXHS callback for each IO
430 * and is passed to QNIO. When QNIO completes the work,
431 * it will be passed back through the callback.
433 static BlockAIOCB *vxhs_aio_rw(BlockDriverState *bs, uint64_t offset,
434 QEMUIOVector *qiov, uint64_t size,
435 BlockCompletionFunc *cb, void *opaque,
438 VXHSAIOCB *acb = NULL;
439 BDRVVXHSState *s = bs->opaque;
442 void *dev_handle = s->vdisk_hostinfo.dev_handle;
444 acb = qemu_aio_get(&vxhs_aiocb_info, bs, cb, opaque);
447 * Initialize VXHSAIOCB.
451 iio_flags = IIO_FLAG_ASYNC;
454 case VDISK_AIO_WRITE:
455 ret = iio_writev(dev_handle, acb, qiov->iov, qiov->niov,
456 offset, size, iio_flags);
459 ret = iio_readv(dev_handle, acb, qiov->iov, qiov->niov,
460 offset, size, iio_flags);
463 trace_vxhs_aio_rw_invalid(iodir);
468 trace_vxhs_aio_rw_ioerr(s->vdisk_guid, iodir, size, offset,
479 static BlockAIOCB *vxhs_aio_preadv(BlockDriverState *bs,
480 uint64_t offset, uint64_t bytes,
481 QEMUIOVector *qiov, int flags,
482 BlockCompletionFunc *cb, void *opaque)
484 return vxhs_aio_rw(bs, offset, qiov, bytes, cb, opaque, VDISK_AIO_READ);
487 static BlockAIOCB *vxhs_aio_pwritev(BlockDriverState *bs,
488 uint64_t offset, uint64_t bytes,
489 QEMUIOVector *qiov, int flags,
490 BlockCompletionFunc *cb, void *opaque)
492 return vxhs_aio_rw(bs, offset, qiov, bytes, cb, opaque, VDISK_AIO_WRITE);
495 static void vxhs_close(BlockDriverState *bs)
497 BDRVVXHSState *s = bs->opaque;
499 trace_vxhs_close(s->vdisk_guid);
501 g_free(s->vdisk_guid);
502 s->vdisk_guid = NULL;
507 if (s->vdisk_hostinfo.dev_handle) {
508 iio_close(s->vdisk_hostinfo.dev_handle);
509 s->vdisk_hostinfo.dev_handle = NULL;
515 * Free the dynamically allocated host string etc
517 g_free(s->vdisk_hostinfo.host);
518 g_free(s->tlscredsid);
519 s->tlscredsid = NULL;
520 s->vdisk_hostinfo.host = NULL;
521 s->vdisk_hostinfo.port = 0;
524 static int64_t vxhs_get_vdisk_stat(BDRVVXHSState *s)
526 int64_t vdisk_size = -1;
528 void *dev_handle = s->vdisk_hostinfo.dev_handle;
530 ret = iio_ioctl(dev_handle, IOR_VDISK_STAT, &vdisk_size, 0);
532 trace_vxhs_get_vdisk_stat_err(s->vdisk_guid, ret, errno);
536 trace_vxhs_get_vdisk_stat(s->vdisk_guid, vdisk_size);
541 * Returns the size of vDisk in bytes. This is required
542 * by QEMU block upper block layer so that it is visible
545 static int64_t vxhs_getlength(BlockDriverState *bs)
547 BDRVVXHSState *s = bs->opaque;
550 vdisk_size = vxhs_get_vdisk_stat(s);
551 if (vdisk_size < 0) {
558 static BlockDriver bdrv_vxhs = {
559 .format_name = "vxhs",
560 .protocol_name = "vxhs",
561 .instance_size = sizeof(BDRVVXHSState),
562 .bdrv_file_open = vxhs_open,
563 .bdrv_parse_filename = vxhs_parse_filename,
564 .bdrv_refresh_limits = vxhs_refresh_limits,
565 .bdrv_close = vxhs_close,
566 .bdrv_getlength = vxhs_getlength,
567 .bdrv_aio_preadv = vxhs_aio_preadv,
568 .bdrv_aio_pwritev = vxhs_aio_pwritev,
571 static void bdrv_vxhs_init(void)
573 bdrv_register(&bdrv_vxhs);
576 block_init(bdrv_vxhs_init);