FreeBSD Bugzilla – Attachment 171853 Details for
Bug 210425
[Hyper-V]"smartctl -i /dev/da0" on FreeBSD 10.3 on Windows 2010 & 2016 server caused disk detached
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[patch]
Fix the issue caused by inquiry
inquiry_fix_10_3.patch (text/plain), 60.56 KB, created by
Hongjiang
on 2016-06-27 05:34:58 UTC
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hide
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Description:
Fix the issue caused by inquiry
Filename:
MIME Type:
Creator:
Hongjiang
Created:
2016-06-27 05:34:58 UTC
Size:
60.56 KB
patch
obsolete
>diff --git a/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c b/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c >index c0c4563..36255a8 100644 >--- a/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c >+++ b/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c >@@ -1,2170 +1,2205 @@ > /*- > * Copyright (c) 2009-2012,2016 Microsoft Corp. > * Copyright (c) 2012 NetApp Inc. > * Copyright (c) 2012 Citrix Inc. > * All rights reserved. > * > * Redistribution and use in source and binary forms, with or without > * modification, are permitted provided that the following conditions > * are met: > * 1. Redistributions of source code must retain the above copyright > * notice unmodified, this list of conditions, and the following > * disclaimer. > * 2. Redistributions in binary form must reproduce the above copyright > * notice, this list of conditions and the following disclaimer in the > * documentation and/or other materials provided with the distribution. > * > * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR > * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES > * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. > * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, > * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT > * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, > * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY > * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT > * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF > * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. > */ > > /** > * StorVSC driver for Hyper-V. This driver presents a SCSI HBA interface > * to the Comman Access Method (CAM) layer. CAM control blocks (CCBs) are > * converted into VSCSI protocol messages which are delivered to the parent > * partition StorVSP driver over the Hyper-V VMBUS. > */ > #include <sys/cdefs.h> > __FBSDID("$FreeBSD$"); > > #include <sys/param.h> > #include <sys/proc.h> > #include <sys/condvar.h> > #include <sys/time.h> > #include <sys/systm.h> > #include <sys/sockio.h> > #include <sys/mbuf.h> > #include <sys/malloc.h> > #include <sys/module.h> > #include <sys/kernel.h> > #include <sys/queue.h> > #include <sys/lock.h> > #include <sys/sx.h> > #include <sys/taskqueue.h> > #include <sys/bus.h> > #include <sys/mutex.h> > #include <sys/callout.h> > #include <vm/vm.h> > #include <vm/pmap.h> > #include <vm/uma.h> > #include <sys/lock.h> > #include <sys/sema.h> > #include <sys/sglist.h> > #include <machine/bus.h> > #include <sys/bus_dma.h> > > #include <cam/cam.h> > #include <cam/cam_ccb.h> > #include <cam/cam_periph.h> > #include <cam/cam_sim.h> > #include <cam/cam_xpt_sim.h> > #include <cam/cam_xpt_internal.h> > #include <cam/cam_debug.h> > #include <cam/scsi/scsi_all.h> > #include <cam/scsi/scsi_message.h> > > #include <dev/hyperv/include/hyperv.h> > #include "hv_vstorage.h" > > #define STORVSC_RINGBUFFER_SIZE (20*PAGE_SIZE) > #define STORVSC_MAX_LUNS_PER_TARGET (64) > #define STORVSC_MAX_IO_REQUESTS (STORVSC_MAX_LUNS_PER_TARGET * 2) > #define BLKVSC_MAX_IDE_DISKS_PER_TARGET (1) > #define BLKVSC_MAX_IO_REQUESTS STORVSC_MAX_IO_REQUESTS > #define STORVSC_MAX_TARGETS (2) > > #define VSTOR_PKT_SIZE (sizeof(struct vstor_packet) - vmscsi_size_delta) > > #define HV_ALIGN(x, a) roundup2(x, a) > > struct storvsc_softc; > > struct hv_sgl_node { > LIST_ENTRY(hv_sgl_node) link; > struct sglist *sgl_data; > }; > > struct hv_sgl_page_pool{ > LIST_HEAD(, hv_sgl_node) in_use_sgl_list; > LIST_HEAD(, hv_sgl_node) free_sgl_list; > boolean_t is_init; > } g_hv_sgl_page_pool; > > #define STORVSC_MAX_SG_PAGE_CNT STORVSC_MAX_IO_REQUESTS * HV_MAX_MULTIPAGE_BUFFER_COUNT > > enum storvsc_request_type { > WRITE_TYPE, > READ_TYPE, > UNKNOWN_TYPE > }; > > struct hv_storvsc_request { > LIST_ENTRY(hv_storvsc_request) link; > struct vstor_packet vstor_packet; > hv_vmbus_multipage_buffer data_buf; > void *sense_data; > uint8_t sense_info_len; > uint8_t retries; > union ccb *ccb; > struct storvsc_softc *softc; > struct callout callout; > struct sema synch_sema; /*Synchronize the request/response if needed */ > struct sglist *bounce_sgl; > unsigned int bounce_sgl_count; > uint64_t not_aligned_seg_bits; > }; > > struct storvsc_softc { > struct hv_device *hs_dev; > LIST_HEAD(, hv_storvsc_request) hs_free_list; > struct mtx hs_lock; > struct storvsc_driver_props *hs_drv_props; > int hs_unit; > uint32_t hs_frozen; > struct cam_sim *hs_sim; > struct cam_path *hs_path; > uint32_t hs_num_out_reqs; > boolean_t hs_destroy; > boolean_t hs_drain_notify; > struct sema hs_drain_sema; > struct hv_storvsc_request hs_init_req; > struct hv_storvsc_request hs_reset_req; > }; > > > /** > * HyperV storvsc timeout testing cases: > * a. IO returned after first timeout; > * b. IO returned after second timeout and queue freeze; > * c. IO returned while timer handler is running > * The first can be tested by "sg_senddiag -vv /dev/daX", > * and the second and third can be done by > * "sg_wr_mode -v -p 08 -c 0,1a -m 0,ff /dev/daX". > */ > #define HVS_TIMEOUT_TEST 0 > > /* > * Bus/adapter reset functionality on the Hyper-V host is > * buggy and it will be disabled until > * it can be further tested. > */ > #define HVS_HOST_RESET 0 > > struct storvsc_driver_props { > char *drv_name; > char *drv_desc; > uint8_t drv_max_luns_per_target; > uint8_t drv_max_ios_per_target; > uint32_t drv_ringbuffer_size; > }; > > enum hv_storage_type { > DRIVER_BLKVSC, > DRIVER_STORVSC, > DRIVER_UNKNOWN > }; > > #define HS_MAX_ADAPTERS 10 > > #define HV_STORAGE_SUPPORTS_MULTI_CHANNEL 0x1 > > /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ > static const hv_guid gStorVscDeviceType={ > .data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, > 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f} > }; > > /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ > static const hv_guid gBlkVscDeviceType={ > .data = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, > 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5} > }; > > static struct storvsc_driver_props g_drv_props_table[] = { > {"blkvsc", "Hyper-V IDE Storage Interface", > BLKVSC_MAX_IDE_DISKS_PER_TARGET, BLKVSC_MAX_IO_REQUESTS, > STORVSC_RINGBUFFER_SIZE}, > {"storvsc", "Hyper-V SCSI Storage Interface", > STORVSC_MAX_LUNS_PER_TARGET, STORVSC_MAX_IO_REQUESTS, > STORVSC_RINGBUFFER_SIZE} > }; > > /* > * Sense buffer size changed in win8; have a run-time > * variable to track the size we should use. > */ > static int sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE; > > /* > * The size of the vmscsi_request has changed in win8. The > * additional size is for the newly added elements in the > * structure. These elements are valid only when we are talking > * to a win8 host. > * Track the correct size we need to apply. > */ > static int vmscsi_size_delta; > /* > * The storage protocol version is determined during the > * initial exchange with the host. It will indicate which > * storage functionality is available in the host. > */ > static int vmstor_proto_version; > > struct vmstor_proto { > int proto_version; > int sense_buffer_size; > int vmscsi_size_delta; > }; > > static const struct vmstor_proto vmstor_proto_list[] = { > { > VMSTOR_PROTOCOL_VERSION_WIN10, > POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, > 0 > }, > { > VMSTOR_PROTOCOL_VERSION_WIN8_1, > POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, > 0 > }, > { > VMSTOR_PROTOCOL_VERSION_WIN8, > POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, > 0 > }, > { > VMSTOR_PROTOCOL_VERSION_WIN7, > PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, > sizeof(struct vmscsi_win8_extension), > }, > { > VMSTOR_PROTOCOL_VERSION_WIN6, > PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, > sizeof(struct vmscsi_win8_extension), > } > }; > > /* static functions */ > static int storvsc_probe(device_t dev); > static int storvsc_attach(device_t dev); > static int storvsc_detach(device_t dev); > static void storvsc_poll(struct cam_sim * sim); > static void storvsc_action(struct cam_sim * sim, union ccb * ccb); > static int create_storvsc_request(union ccb *ccb, struct hv_storvsc_request *reqp); > static void storvsc_free_request(struct storvsc_softc *sc, struct hv_storvsc_request *reqp); > static enum hv_storage_type storvsc_get_storage_type(device_t dev); > static void hv_storvsc_rescan_target(struct storvsc_softc *sc); > static void hv_storvsc_on_channel_callback(void *context); > static void hv_storvsc_on_iocompletion( struct storvsc_softc *sc, > struct vstor_packet *vstor_packet, > struct hv_storvsc_request *request); > static int hv_storvsc_connect_vsp(struct hv_device *device); > static void storvsc_io_done(struct hv_storvsc_request *reqp); > static void storvsc_copy_sgl_to_bounce_buf(struct sglist *bounce_sgl, > bus_dma_segment_t *orig_sgl, > unsigned int orig_sgl_count, > uint64_t seg_bits); > void storvsc_copy_from_bounce_buf_to_sgl(bus_dma_segment_t *dest_sgl, > unsigned int dest_sgl_count, > struct sglist* src_sgl, > uint64_t seg_bits); > > static device_method_t storvsc_methods[] = { > /* Device interface */ > DEVMETHOD(device_probe, storvsc_probe), > DEVMETHOD(device_attach, storvsc_attach), > DEVMETHOD(device_detach, storvsc_detach), > DEVMETHOD(device_shutdown, bus_generic_shutdown), > DEVMETHOD_END > }; > > static driver_t storvsc_driver = { > "storvsc", storvsc_methods, sizeof(struct storvsc_softc), > }; > > static devclass_t storvsc_devclass; > DRIVER_MODULE(storvsc, vmbus, storvsc_driver, storvsc_devclass, 0, 0); > MODULE_VERSION(storvsc, 1); > MODULE_DEPEND(storvsc, vmbus, 1, 1, 1); > > > /** > * The host is capable of sending messages to us that are > * completely unsolicited. So, we need to address the race > * condition where we may be in the process of unloading the > * driver when the host may send us an unsolicited message. > * We address this issue by implementing a sequentially > * consistent protocol: > * > * 1. Channel callback is invoked while holding the channel lock > * and an unloading driver will reset the channel callback under > * the protection of this channel lock. > * > * 2. To ensure bounded wait time for unloading a driver, we don't > * permit outgoing traffic once the device is marked as being > * destroyed. > * > * 3. Once the device is marked as being destroyed, we only > * permit incoming traffic to properly account for > * packets already sent out. > */ > static inline struct storvsc_softc * > get_stor_device(struct hv_device *device, > boolean_t outbound) > { > struct storvsc_softc *sc; > > sc = device_get_softc(device->device); > > if (outbound) { > /* > * Here we permit outgoing I/O only > * if the device is not being destroyed. > */ > > if (sc->hs_destroy) { > sc = NULL; > } > } else { > /* > * inbound case; if being destroyed > * only permit to account for > * messages already sent out. > */ > if (sc->hs_destroy && (sc->hs_num_out_reqs == 0)) { > sc = NULL; > } > } > return sc; > } > > static void > storvsc_subchan_attach(struct hv_vmbus_channel *new_channel) > { > struct hv_device *device; > struct storvsc_softc *sc; > struct vmstor_chan_props props; > int ret = 0; > > device = new_channel->device; > sc = get_stor_device(device, TRUE); > if (sc == NULL) > return; > > memset(&props, 0, sizeof(props)); > > ret = hv_vmbus_channel_open(new_channel, > sc->hs_drv_props->drv_ringbuffer_size, > sc->hs_drv_props->drv_ringbuffer_size, > (void *)&props, > sizeof(struct vmstor_chan_props), > hv_storvsc_on_channel_callback, > new_channel); > > return; > } > > /** > * @brief Send multi-channel creation request to host > * > * @param device a Hyper-V device pointer > * @param max_chans the max channels supported by vmbus > */ > static void > storvsc_send_multichannel_request(struct hv_device *dev, int max_chans) > { > struct hv_vmbus_channel **subchan; > struct storvsc_softc *sc; > struct hv_storvsc_request *request; > struct vstor_packet *vstor_packet; > int request_channels_cnt = 0; > int ret, i; > > /* get multichannels count that need to create */ > request_channels_cnt = MIN(max_chans, mp_ncpus); > > sc = get_stor_device(dev, TRUE); > if (sc == NULL) { > printf("Storvsc_error: get sc failed while send mutilchannel " > "request\n"); > return; > } > > request = &sc->hs_init_req; > > /* request the host to create multi-channel */ > memset(request, 0, sizeof(struct hv_storvsc_request)); > > sema_init(&request->synch_sema, 0, ("stor_synch_sema")); > > vstor_packet = &request->vstor_packet; > > vstor_packet->operation = VSTOR_OPERATION_CREATE_MULTI_CHANNELS; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > vstor_packet->u.multi_channels_cnt = request_channels_cnt; > > ret = hv_vmbus_channel_send_packet( > dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > /* wait for 5 seconds */ > ret = sema_timedwait(&request->synch_sema, 5 * hz); > if (ret != 0) { > printf("Storvsc_error: create multi-channel timeout, %d\n", > ret); > return; > } > > if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || > vstor_packet->status != 0) { > printf("Storvsc_error: create multi-channel invalid operation " > "(%d) or statue (%u)\n", > vstor_packet->operation, vstor_packet->status); > return; > } > > /* Wait for sub-channels setup to complete. */ > subchan = vmbus_get_subchan(dev->channel, request_channels_cnt); > > /* Attach the sub-channels. */ > for (i = 0; i < request_channels_cnt; ++i) > storvsc_subchan_attach(subchan[i]); > > /* Release the sub-channels. */ > vmbus_rel_subchan(subchan, request_channels_cnt); > > if (bootverbose) > printf("Storvsc create multi-channel success!\n"); > } > > /** > * @brief initialize channel connection to parent partition > * > * @param dev a Hyper-V device pointer > * @returns 0 on success, non-zero error on failure > */ > static int > hv_storvsc_channel_init(struct hv_device *dev) > { > int ret = 0, i; > struct hv_storvsc_request *request; > struct vstor_packet *vstor_packet; > struct storvsc_softc *sc; > uint16_t max_chans = 0; > boolean_t support_multichannel = FALSE; > > max_chans = 0; > support_multichannel = FALSE; > > sc = get_stor_device(dev, TRUE); > if (sc == NULL) > return (ENODEV); > > request = &sc->hs_init_req; > memset(request, 0, sizeof(struct hv_storvsc_request)); > vstor_packet = &request->vstor_packet; > request->softc = sc; > > /** > * Initiate the vsc/vsp initialization protocol on the open channel > */ > sema_init(&request->synch_sema, 0, ("stor_synch_sema")); > > vstor_packet->operation = VSTOR_OPERATION_BEGININITIALIZATION; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > > > ret = hv_vmbus_channel_send_packet( > dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > if (ret != 0) > goto cleanup; > > /* wait 5 seconds */ > ret = sema_timedwait(&request->synch_sema, 5 * hz); > if (ret != 0) > goto cleanup; > > if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || > vstor_packet->status != 0) { > goto cleanup; > } > > for (i = 0; i < nitems(vmstor_proto_list); i++) { > /* reuse the packet for version range supported */ > > memset(vstor_packet, 0, sizeof(struct vstor_packet)); > vstor_packet->operation = VSTOR_OPERATION_QUERYPROTOCOLVERSION; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > > vstor_packet->u.version.major_minor = > vmstor_proto_list[i].proto_version; > > /* revision is only significant for Windows guests */ > vstor_packet->u.version.revision = 0; > > ret = hv_vmbus_channel_send_packet( > dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > if (ret != 0) > goto cleanup; > > /* wait 5 seconds */ > ret = sema_timedwait(&request->synch_sema, 5 * hz); > > if (ret) > goto cleanup; > > if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO) { > ret = EINVAL; > goto cleanup; > } > if (vstor_packet->status == 0) { > vmstor_proto_version = > vmstor_proto_list[i].proto_version; > sense_buffer_size = > vmstor_proto_list[i].sense_buffer_size; > vmscsi_size_delta = > vmstor_proto_list[i].vmscsi_size_delta; > break; > } > } > > if (vstor_packet->status != 0) { > ret = EINVAL; > goto cleanup; > } > /** > * Query channel properties > */ > memset(vstor_packet, 0, sizeof(struct vstor_packet)); > vstor_packet->operation = VSTOR_OPERATION_QUERYPROPERTIES; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > > ret = hv_vmbus_channel_send_packet( > dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > if ( ret != 0) > goto cleanup; > > /* wait 5 seconds */ > ret = sema_timedwait(&request->synch_sema, 5 * hz); > > if (ret != 0) > goto cleanup; > > /* TODO: Check returned version */ > if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || > vstor_packet->status != 0) { > goto cleanup; > } > > /* multi-channels feature is supported by WIN8 and above version */ > max_chans = vstor_packet->u.chan_props.max_channel_cnt; > if ((hv_vmbus_protocal_version != HV_VMBUS_VERSION_WIN7) && > (hv_vmbus_protocal_version != HV_VMBUS_VERSION_WS2008) && > (vstor_packet->u.chan_props.flags & > HV_STORAGE_SUPPORTS_MULTI_CHANNEL)) { > support_multichannel = TRUE; > } > > memset(vstor_packet, 0, sizeof(struct vstor_packet)); > vstor_packet->operation = VSTOR_OPERATION_ENDINITIALIZATION; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > > ret = hv_vmbus_channel_send_packet( > dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > if (ret != 0) { > goto cleanup; > } > > /* wait 5 seconds */ > ret = sema_timedwait(&request->synch_sema, 5 * hz); > > if (ret != 0) > goto cleanup; > > if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || > vstor_packet->status != 0) > goto cleanup; > > /* > * If multi-channel is supported, send multichannel create > * request to host. > */ > if (support_multichannel) > storvsc_send_multichannel_request(dev, max_chans); > > cleanup: > sema_destroy(&request->synch_sema); > return (ret); > } > > /** > * @brief Open channel connection to paraent partition StorVSP driver > * > * Open and initialize channel connection to parent partition StorVSP driver. > * > * @param pointer to a Hyper-V device > * @returns 0 on success, non-zero error on failure > */ > static int > hv_storvsc_connect_vsp(struct hv_device *dev) > { > int ret = 0; > struct vmstor_chan_props props; > struct storvsc_softc *sc; > > sc = device_get_softc(dev->device); > > memset(&props, 0, sizeof(struct vmstor_chan_props)); > > /* > * Open the channel > */ > > ret = hv_vmbus_channel_open( > dev->channel, > sc->hs_drv_props->drv_ringbuffer_size, > sc->hs_drv_props->drv_ringbuffer_size, > (void *)&props, > sizeof(struct vmstor_chan_props), > hv_storvsc_on_channel_callback, > dev->channel); > > if (ret != 0) { > return ret; > } > > ret = hv_storvsc_channel_init(dev); > > return (ret); > } > > #if HVS_HOST_RESET > static int > hv_storvsc_host_reset(struct hv_device *dev) > { > int ret = 0; > struct storvsc_softc *sc; > > struct hv_storvsc_request *request; > struct vstor_packet *vstor_packet; > > sc = get_stor_device(dev, TRUE); > if (sc == NULL) { > return ENODEV; > } > > request = &sc->hs_reset_req; > request->softc = sc; > vstor_packet = &request->vstor_packet; > > sema_init(&request->synch_sema, 0, "stor synch sema"); > > vstor_packet->operation = VSTOR_OPERATION_RESETBUS; > vstor_packet->flags = REQUEST_COMPLETION_FLAG; > > ret = hv_vmbus_channel_send_packet(dev->channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)&sc->hs_reset_req, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > > if (ret != 0) { > goto cleanup; > } > > ret = sema_timedwait(&request->synch_sema, 5 * hz); /* KYS 5 seconds */ > > if (ret) { > goto cleanup; > } > > > /* > * At this point, all outstanding requests in the adapter > * should have been flushed out and return to us > */ > > cleanup: > sema_destroy(&request->synch_sema); > return (ret); > } > #endif /* HVS_HOST_RESET */ > > /** > * @brief Function to initiate an I/O request > * > * @param device Hyper-V device pointer > * @param request pointer to a request structure > * @returns 0 on success, non-zero error on failure > */ > static int > hv_storvsc_io_request(struct hv_device *device, > struct hv_storvsc_request *request) > { > struct storvsc_softc *sc; > struct vstor_packet *vstor_packet = &request->vstor_packet; > struct hv_vmbus_channel* outgoing_channel = NULL; > int ret = 0; > > sc = get_stor_device(device, TRUE); > > if (sc == NULL) { > return ENODEV; > } > > vstor_packet->flags |= REQUEST_COMPLETION_FLAG; > > vstor_packet->u.vm_srb.length = VSTOR_PKT_SIZE; > > vstor_packet->u.vm_srb.sense_info_len = sense_buffer_size; > > vstor_packet->u.vm_srb.transfer_len = request->data_buf.length; > > vstor_packet->operation = VSTOR_OPERATION_EXECUTESRB; > > outgoing_channel = vmbus_select_outgoing_channel(device->channel); > > mtx_unlock(&request->softc->hs_lock); > if (request->data_buf.length) { > ret = hv_vmbus_channel_send_packet_multipagebuffer( > outgoing_channel, > &request->data_buf, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request); > > } else { > ret = hv_vmbus_channel_send_packet( > outgoing_channel, > vstor_packet, > VSTOR_PKT_SIZE, > (uint64_t)(uintptr_t)request, > HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, > HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); > } > mtx_lock(&request->softc->hs_lock); > > if (ret != 0) { > printf("Unable to send packet %p ret %d", vstor_packet, ret); > } else { > atomic_add_int(&sc->hs_num_out_reqs, 1); > } > > return (ret); > } > > > /** > * Process IO_COMPLETION_OPERATION and ready > * the result to be completed for upper layer > * processing by the CAM layer. > */ > static void > hv_storvsc_on_iocompletion(struct storvsc_softc *sc, > struct vstor_packet *vstor_packet, > struct hv_storvsc_request *request) > { > struct vmscsi_req *vm_srb; > > vm_srb = &vstor_packet->u.vm_srb; > > if (((vm_srb->scsi_status & 0xFF) == SCSI_STATUS_CHECK_COND) && > (vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID)) { > /* Autosense data available */ > > KASSERT(vm_srb->sense_info_len <= request->sense_info_len, > ("vm_srb->sense_info_len <= " > "request->sense_info_len")); > > memcpy(request->sense_data, vm_srb->u.sense_data, > vm_srb->sense_info_len); > > request->sense_info_len = vm_srb->sense_info_len; > } > > /* Complete request by passing to the CAM layer */ > storvsc_io_done(request); > atomic_subtract_int(&sc->hs_num_out_reqs, 1); > if (sc->hs_drain_notify && (sc->hs_num_out_reqs == 0)) { > sema_post(&sc->hs_drain_sema); > } > } > > static void > hv_storvsc_rescan_target(struct storvsc_softc *sc) > { > path_id_t pathid; > target_id_t targetid; > union ccb *ccb; > > pathid = cam_sim_path(sc->hs_sim); > targetid = CAM_TARGET_WILDCARD; > > /* > * Allocate a CCB and schedule a rescan. > */ > ccb = xpt_alloc_ccb_nowait(); > if (ccb == NULL) { > printf("unable to alloc CCB for rescan\n"); > return; > } > > if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid, targetid, > CAM_LUN_WILDCARD) != CAM_REQ_CMP) { > printf("unable to create path for rescan, pathid: %u," > "targetid: %u\n", pathid, targetid); > xpt_free_ccb(ccb); > return; > } > > if (targetid == CAM_TARGET_WILDCARD) > ccb->ccb_h.func_code = XPT_SCAN_BUS; > else > ccb->ccb_h.func_code = XPT_SCAN_TGT; > > xpt_rescan(ccb); > } > > static void > hv_storvsc_on_channel_callback(void *context) > { > int ret = 0; > hv_vmbus_channel *channel = (hv_vmbus_channel *)context; > struct hv_device *device = NULL; > struct storvsc_softc *sc; > uint32_t bytes_recvd; > uint64_t request_id; > uint8_t packet[roundup2(sizeof(struct vstor_packet), 8)]; > struct hv_storvsc_request *request; > struct vstor_packet *vstor_packet; > > device = channel->device; > KASSERT(device, ("device is NULL")); > > sc = get_stor_device(device, FALSE); > if (sc == NULL) { > printf("Storvsc_error: get stor device failed.\n"); > return; > } > > ret = hv_vmbus_channel_recv_packet( > channel, > packet, > roundup2(VSTOR_PKT_SIZE, 8), > &bytes_recvd, > &request_id); > > while ((ret == 0) && (bytes_recvd > 0)) { > request = (struct hv_storvsc_request *)(uintptr_t)request_id; > > if ((request == &sc->hs_init_req) || > (request == &sc->hs_reset_req)) { > memcpy(&request->vstor_packet, packet, > sizeof(struct vstor_packet)); > sema_post(&request->synch_sema); > } else { > vstor_packet = (struct vstor_packet *)packet; > switch(vstor_packet->operation) { > case VSTOR_OPERATION_COMPLETEIO: > if (request == NULL) > panic("VMBUS: storvsc received a " > "packet with NULL request id in " > "COMPLETEIO operation."); > > hv_storvsc_on_iocompletion(sc, > vstor_packet, request); > break; > case VSTOR_OPERATION_REMOVEDEVICE: > printf("VMBUS: storvsc operation %d not " > "implemented.\n", vstor_packet->operation); > /* TODO: implement */ > break; > case VSTOR_OPERATION_ENUMERATE_BUS: > hv_storvsc_rescan_target(sc); > break; > default: > break; > } > } > ret = hv_vmbus_channel_recv_packet( > channel, > packet, > roundup2(VSTOR_PKT_SIZE, 8), > &bytes_recvd, > &request_id); > } > } > > /** > * @brief StorVSC probe function > * > * Device probe function. Returns 0 if the input device is a StorVSC > * device. Otherwise, a ENXIO is returned. If the input device is > * for BlkVSC (paravirtual IDE) device and this support is disabled in > * favor of the emulated ATA/IDE device, return ENXIO. > * > * @param a device > * @returns 0 on success, ENXIO if not a matcing StorVSC device > */ > static int > storvsc_probe(device_t dev) > { > int ata_disk_enable = 0; > int ret = ENXIO; > > switch (storvsc_get_storage_type(dev)) { > case DRIVER_BLKVSC: > if(bootverbose) > device_printf(dev, "DRIVER_BLKVSC-Emulated ATA/IDE probe\n"); > if (!getenv_int("hw.ata.disk_enable", &ata_disk_enable)) { > if(bootverbose) > device_printf(dev, > "Enlightened ATA/IDE detected\n"); > device_set_desc(dev, g_drv_props_table[DRIVER_BLKVSC].drv_desc); > ret = BUS_PROBE_DEFAULT; > } else if(bootverbose) > device_printf(dev, "Emulated ATA/IDE set (hw.ata.disk_enable set)\n"); > break; > case DRIVER_STORVSC: > if(bootverbose) > device_printf(dev, "Enlightened SCSI device detected\n"); > device_set_desc(dev, g_drv_props_table[DRIVER_STORVSC].drv_desc); > ret = BUS_PROBE_DEFAULT; > break; > default: > ret = ENXIO; > } > return (ret); > } > > /** > * @brief StorVSC attach function > * > * Function responsible for allocating per-device structures, > * setting up CAM interfaces and scanning for available LUNs to > * be used for SCSI device peripherals. > * > * @param a device > * @returns 0 on success or an error on failure > */ > static int > storvsc_attach(device_t dev) > { > struct hv_device *hv_dev = vmbus_get_devctx(dev); > enum hv_storage_type stor_type; > struct storvsc_softc *sc; > struct cam_devq *devq; > int ret, i, j; > struct hv_storvsc_request *reqp; > struct root_hold_token *root_mount_token = NULL; > struct hv_sgl_node *sgl_node = NULL; > void *tmp_buff = NULL; > > /* > * We need to serialize storvsc attach calls. > */ > root_mount_token = root_mount_hold("storvsc"); > > sc = device_get_softc(dev); > > stor_type = storvsc_get_storage_type(dev); > > if (stor_type == DRIVER_UNKNOWN) { > ret = ENODEV; > goto cleanup; > } > > /* fill in driver specific properties */ > sc->hs_drv_props = &g_drv_props_table[stor_type]; > > /* fill in device specific properties */ > sc->hs_unit = device_get_unit(dev); > sc->hs_dev = hv_dev; > > LIST_INIT(&sc->hs_free_list); > mtx_init(&sc->hs_lock, "hvslck", NULL, MTX_DEF); > > for (i = 0; i < sc->hs_drv_props->drv_max_ios_per_target; ++i) { > reqp = malloc(sizeof(struct hv_storvsc_request), > M_DEVBUF, M_WAITOK|M_ZERO); > reqp->softc = sc; > > LIST_INSERT_HEAD(&sc->hs_free_list, reqp, link); > } > > /* create sg-list page pool */ > if (FALSE == g_hv_sgl_page_pool.is_init) { > g_hv_sgl_page_pool.is_init = TRUE; > LIST_INIT(&g_hv_sgl_page_pool.in_use_sgl_list); > LIST_INIT(&g_hv_sgl_page_pool.free_sgl_list); > > /* > * Pre-create SG list, each SG list with > * HV_MAX_MULTIPAGE_BUFFER_COUNT segments, each > * segment has one page buffer > */ > for (i = 0; i < STORVSC_MAX_IO_REQUESTS; i++) { > sgl_node = malloc(sizeof(struct hv_sgl_node), > M_DEVBUF, M_WAITOK|M_ZERO); > > sgl_node->sgl_data = > sglist_alloc(HV_MAX_MULTIPAGE_BUFFER_COUNT, > M_WAITOK|M_ZERO); > > for (j = 0; j < HV_MAX_MULTIPAGE_BUFFER_COUNT; j++) { > tmp_buff = malloc(PAGE_SIZE, > M_DEVBUF, M_WAITOK|M_ZERO); > > sgl_node->sgl_data->sg_segs[j].ss_paddr = > (vm_paddr_t)tmp_buff; > } > > LIST_INSERT_HEAD(&g_hv_sgl_page_pool.free_sgl_list, > sgl_node, link); > } > } > > sc->hs_destroy = FALSE; > sc->hs_drain_notify = FALSE; > sema_init(&sc->hs_drain_sema, 0, "Store Drain Sema"); > > ret = hv_storvsc_connect_vsp(hv_dev); > if (ret != 0) { > goto cleanup; > } > > /* > * Create the device queue. > * Hyper-V maps each target to one SCSI HBA > */ > devq = cam_simq_alloc(sc->hs_drv_props->drv_max_ios_per_target); > if (devq == NULL) { > device_printf(dev, "Failed to alloc device queue\n"); > ret = ENOMEM; > goto cleanup; > } > > sc->hs_sim = cam_sim_alloc(storvsc_action, > storvsc_poll, > sc->hs_drv_props->drv_name, > sc, > sc->hs_unit, > &sc->hs_lock, 1, > sc->hs_drv_props->drv_max_ios_per_target, > devq); > > if (sc->hs_sim == NULL) { > device_printf(dev, "Failed to alloc sim\n"); > cam_simq_free(devq); > ret = ENOMEM; > goto cleanup; > } > > mtx_lock(&sc->hs_lock); > /* bus_id is set to 0, need to get it from VMBUS channel query? */ > if (xpt_bus_register(sc->hs_sim, dev, 0) != CAM_SUCCESS) { > cam_sim_free(sc->hs_sim, /*free_devq*/TRUE); > mtx_unlock(&sc->hs_lock); > device_printf(dev, "Unable to register SCSI bus\n"); > ret = ENXIO; > goto cleanup; > } > > if (xpt_create_path(&sc->hs_path, /*periph*/NULL, > cam_sim_path(sc->hs_sim), > CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { > xpt_bus_deregister(cam_sim_path(sc->hs_sim)); > cam_sim_free(sc->hs_sim, /*free_devq*/TRUE); > mtx_unlock(&sc->hs_lock); > device_printf(dev, "Unable to create path\n"); > ret = ENXIO; > goto cleanup; > } > > mtx_unlock(&sc->hs_lock); > > root_mount_rel(root_mount_token); > return (0); > > > cleanup: > root_mount_rel(root_mount_token); > while (!LIST_EMPTY(&sc->hs_free_list)) { > reqp = LIST_FIRST(&sc->hs_free_list); > LIST_REMOVE(reqp, link); > free(reqp, M_DEVBUF); > } > > while (!LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { > sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); > LIST_REMOVE(sgl_node, link); > for (j = 0; j < HV_MAX_MULTIPAGE_BUFFER_COUNT; j++) { > if (NULL != > (void*)sgl_node->sgl_data->sg_segs[j].ss_paddr) { > free((void*)sgl_node->sgl_data->sg_segs[j].ss_paddr, M_DEVBUF); > } > } > sglist_free(sgl_node->sgl_data); > free(sgl_node, M_DEVBUF); > } > > return (ret); > } > > /** > * @brief StorVSC device detach function > * > * This function is responsible for safely detaching a > * StorVSC device. This includes waiting for inbound responses > * to complete and freeing associated per-device structures. > * > * @param dev a device > * returns 0 on success > */ > static int > storvsc_detach(device_t dev) > { > struct storvsc_softc *sc = device_get_softc(dev); > struct hv_storvsc_request *reqp = NULL; > struct hv_device *hv_device = vmbus_get_devctx(dev); > struct hv_sgl_node *sgl_node = NULL; > int j = 0; > > sc->hs_destroy = TRUE; > > /* > * At this point, all outbound traffic should be disabled. We > * only allow inbound traffic (responses) to proceed so that > * outstanding requests can be completed. > */ > > sc->hs_drain_notify = TRUE; > sema_wait(&sc->hs_drain_sema); > sc->hs_drain_notify = FALSE; > > /* > * Since we have already drained, we don't need to busy wait. > * The call to close the channel will reset the callback > * under the protection of the incoming channel lock. > */ > > hv_vmbus_channel_close(hv_device->channel); > > mtx_lock(&sc->hs_lock); > while (!LIST_EMPTY(&sc->hs_free_list)) { > reqp = LIST_FIRST(&sc->hs_free_list); > LIST_REMOVE(reqp, link); > > free(reqp, M_DEVBUF); > } > mtx_unlock(&sc->hs_lock); > > while (!LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { > sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); > LIST_REMOVE(sgl_node, link); > for (j = 0; j < HV_MAX_MULTIPAGE_BUFFER_COUNT; j++){ > if (NULL != > (void*)sgl_node->sgl_data->sg_segs[j].ss_paddr) { > free((void*)sgl_node->sgl_data->sg_segs[j].ss_paddr, M_DEVBUF); > } > } > sglist_free(sgl_node->sgl_data); > free(sgl_node, M_DEVBUF); > } > > return (0); > } > > #if HVS_TIMEOUT_TEST > /** > * @brief unit test for timed out operations > * > * This function provides unit testing capability to simulate > * timed out operations. Recompilation with HV_TIMEOUT_TEST=1 > * is required. > * > * @param reqp pointer to a request structure > * @param opcode SCSI operation being performed > * @param wait if 1, wait for I/O to complete > */ > static void > storvsc_timeout_test(struct hv_storvsc_request *reqp, > uint8_t opcode, int wait) > { > int ret; > union ccb *ccb = reqp->ccb; > struct storvsc_softc *sc = reqp->softc; > > if (reqp->vstor_packet.vm_srb.cdb[0] != opcode) { > return; > } > > if (wait) { > mtx_lock(&reqp->event.mtx); > } > ret = hv_storvsc_io_request(sc->hs_dev, reqp); > if (ret != 0) { > if (wait) { > mtx_unlock(&reqp->event.mtx); > } > printf("%s: io_request failed with %d.\n", > __func__, ret); > ccb->ccb_h.status = CAM_PROVIDE_FAIL; > mtx_lock(&sc->hs_lock); > storvsc_free_request(sc, reqp); > xpt_done(ccb); > mtx_unlock(&sc->hs_lock); > return; > } > > if (wait) { > xpt_print(ccb->ccb_h.path, > "%u: %s: waiting for IO return.\n", > ticks, __func__); > ret = cv_timedwait(&reqp->event.cv, &reqp->event.mtx, 60*hz); > mtx_unlock(&reqp->event.mtx); > xpt_print(ccb->ccb_h.path, "%u: %s: %s.\n", > ticks, __func__, (ret == 0)? > "IO return detected" : > "IO return not detected"); > /* > * Now both the timer handler and io done are running > * simultaneously. We want to confirm the io done always > * finishes after the timer handler exits. So reqp used by > * timer handler is not freed or stale. Do busy loop for > * another 1/10 second to make sure io done does > * wait for the timer handler to complete. > */ > DELAY(100*1000); > mtx_lock(&sc->hs_lock); > xpt_print(ccb->ccb_h.path, > "%u: %s: finishing, queue frozen %d, " > "ccb status 0x%x scsi_status 0x%x.\n", > ticks, __func__, sc->hs_frozen, > ccb->ccb_h.status, > ccb->csio.scsi_status); > mtx_unlock(&sc->hs_lock); > } > } > #endif /* HVS_TIMEOUT_TEST */ > > #ifdef notyet > /** > * @brief timeout handler for requests > * > * This function is called as a result of a callout expiring. > * > * @param arg pointer to a request > */ > static void > storvsc_timeout(void *arg) > { > struct hv_storvsc_request *reqp = arg; > struct storvsc_softc *sc = reqp->softc; > union ccb *ccb = reqp->ccb; > > if (reqp->retries == 0) { > mtx_lock(&sc->hs_lock); > xpt_print(ccb->ccb_h.path, > "%u: IO timed out (req=0x%p), wait for another %u secs.\n", > ticks, reqp, ccb->ccb_h.timeout / 1000); > cam_error_print(ccb, CAM_ESF_ALL, CAM_EPF_ALL); > mtx_unlock(&sc->hs_lock); > > reqp->retries++; > callout_reset_sbt(&reqp->callout, SBT_1MS * ccb->ccb_h.timeout, > 0, storvsc_timeout, reqp, 0); > #if HVS_TIMEOUT_TEST > storvsc_timeout_test(reqp, SEND_DIAGNOSTIC, 0); > #endif > return; > } > > mtx_lock(&sc->hs_lock); > xpt_print(ccb->ccb_h.path, > "%u: IO (reqp = 0x%p) did not return for %u seconds, %s.\n", > ticks, reqp, ccb->ccb_h.timeout * (reqp->retries+1) / 1000, > (sc->hs_frozen == 0)? > "freezing the queue" : "the queue is already frozen"); > if (sc->hs_frozen == 0) { > sc->hs_frozen = 1; > xpt_freeze_simq(xpt_path_sim(ccb->ccb_h.path), 1); > } > mtx_unlock(&sc->hs_lock); > > #if HVS_TIMEOUT_TEST > storvsc_timeout_test(reqp, MODE_SELECT_10, 1); > #endif > } > #endif > > /** > * @brief StorVSC device poll function > * > * This function is responsible for servicing requests when > * interrupts are disabled (i.e when we are dumping core.) > * > * @param sim a pointer to a CAM SCSI interface module > */ > static void > storvsc_poll(struct cam_sim *sim) > { > struct storvsc_softc *sc = cam_sim_softc(sim); > > mtx_assert(&sc->hs_lock, MA_OWNED); > mtx_unlock(&sc->hs_lock); > hv_storvsc_on_channel_callback(sc->hs_dev->channel); > mtx_lock(&sc->hs_lock); > } > > /** > * @brief StorVSC device action function > * > * This function is responsible for handling SCSI operations which > * are passed from the CAM layer. The requests are in the form of > * CAM control blocks which indicate the action being performed. > * Not all actions require converting the request to a VSCSI protocol > * message - these actions can be responded to by this driver. > * Requests which are destined for a backend storage device are converted > * to a VSCSI protocol message and sent on the channel connection associated > * with this device. > * > * @param sim pointer to a CAM SCSI interface module > * @param ccb pointer to a CAM control block > */ > static void > storvsc_action(struct cam_sim *sim, union ccb *ccb) > { > struct storvsc_softc *sc = cam_sim_softc(sim); > int res; > > mtx_assert(&sc->hs_lock, MA_OWNED); > switch (ccb->ccb_h.func_code) { > case XPT_PATH_INQ: { > struct ccb_pathinq *cpi = &ccb->cpi; > > cpi->version_num = 1; > cpi->hba_inquiry = PI_TAG_ABLE|PI_SDTR_ABLE; > cpi->target_sprt = 0; > cpi->hba_misc = PIM_NOBUSRESET; > cpi->hba_eng_cnt = 0; > cpi->max_target = STORVSC_MAX_TARGETS; > cpi->max_lun = sc->hs_drv_props->drv_max_luns_per_target; > cpi->initiator_id = cpi->max_target; > cpi->bus_id = cam_sim_bus(sim); > cpi->base_transfer_speed = 300000; > cpi->transport = XPORT_SAS; > cpi->transport_version = 0; > cpi->protocol = PROTO_SCSI; > cpi->protocol_version = SCSI_REV_SPC2; > strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); > strncpy(cpi->hba_vid, sc->hs_drv_props->drv_name, HBA_IDLEN); > strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); > cpi->unit_number = cam_sim_unit(sim); > > ccb->ccb_h.status = CAM_REQ_CMP; > xpt_done(ccb); > return; > } > case XPT_GET_TRAN_SETTINGS: { > struct ccb_trans_settings *cts = &ccb->cts; > > cts->transport = XPORT_SAS; > cts->transport_version = 0; > cts->protocol = PROTO_SCSI; > cts->protocol_version = SCSI_REV_SPC2; > > /* enable tag queuing and disconnected mode */ > cts->proto_specific.valid = CTS_SCSI_VALID_TQ; > cts->proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; > cts->proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; > cts->xport_specific.valid = CTS_SPI_VALID_DISC; > cts->xport_specific.spi.flags = CTS_SPI_FLAGS_DISC_ENB; > > ccb->ccb_h.status = CAM_REQ_CMP; > xpt_done(ccb); > return; > } > case XPT_SET_TRAN_SETTINGS: { > ccb->ccb_h.status = CAM_REQ_CMP; > xpt_done(ccb); > return; > } > case XPT_CALC_GEOMETRY:{ > cam_calc_geometry(&ccb->ccg, 1); > xpt_done(ccb); > return; > } > case XPT_RESET_BUS: > case XPT_RESET_DEV:{ > #if HVS_HOST_RESET > if ((res = hv_storvsc_host_reset(sc->hs_dev)) != 0) { > xpt_print(ccb->ccb_h.path, > "hv_storvsc_host_reset failed with %d\n", res); > ccb->ccb_h.status = CAM_PROVIDE_FAIL; > xpt_done(ccb); > return; > } > ccb->ccb_h.status = CAM_REQ_CMP; > xpt_done(ccb); > return; > #else > xpt_print(ccb->ccb_h.path, > "%s reset not supported.\n", > (ccb->ccb_h.func_code == XPT_RESET_BUS)? > "bus" : "dev"); > ccb->ccb_h.status = CAM_REQ_INVALID; > xpt_done(ccb); > return; > #endif /* HVS_HOST_RESET */ > } > case XPT_SCSI_IO: > case XPT_IMMED_NOTIFY: { > struct hv_storvsc_request *reqp = NULL; > > if (ccb->csio.cdb_len == 0) { > panic("cdl_len is 0\n"); > } > > if (LIST_EMPTY(&sc->hs_free_list)) { > ccb->ccb_h.status = CAM_REQUEUE_REQ; > if (sc->hs_frozen == 0) { > sc->hs_frozen = 1; > xpt_freeze_simq(sim, /* count*/1); > } > xpt_done(ccb); > return; > } > > reqp = LIST_FIRST(&sc->hs_free_list); > LIST_REMOVE(reqp, link); > > bzero(reqp, sizeof(struct hv_storvsc_request)); > reqp->softc = sc; > > ccb->ccb_h.status |= CAM_SIM_QUEUED; > if ((res = create_storvsc_request(ccb, reqp)) != 0) { > ccb->ccb_h.status = CAM_REQ_INVALID; > xpt_done(ccb); > return; > } > > #ifdef notyet > if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) { > callout_init(&reqp->callout, 1); > callout_reset_sbt(&reqp->callout, > SBT_1MS * ccb->ccb_h.timeout, 0, > storvsc_timeout, reqp, 0); > #if HVS_TIMEOUT_TEST > cv_init(&reqp->event.cv, "storvsc timeout cv"); > mtx_init(&reqp->event.mtx, "storvsc timeout mutex", > NULL, MTX_DEF); > switch (reqp->vstor_packet.vm_srb.cdb[0]) { > case MODE_SELECT_10: > case SEND_DIAGNOSTIC: > /* To have timer send the request. */ > return; > default: > break; > } > #endif /* HVS_TIMEOUT_TEST */ > } > #endif > > if ((res = hv_storvsc_io_request(sc->hs_dev, reqp)) != 0) { > xpt_print(ccb->ccb_h.path, > "hv_storvsc_io_request failed with %d\n", res); > ccb->ccb_h.status = CAM_PROVIDE_FAIL; > storvsc_free_request(sc, reqp); > xpt_done(ccb); > return; > } > return; > } > > default: > ccb->ccb_h.status = CAM_REQ_INVALID; > xpt_done(ccb); > return; > } > } > > /** > * @brief destroy bounce buffer > * > * This function is responsible for destroy a Scatter/Gather list > * that create by storvsc_create_bounce_buffer() > * > * @param sgl- the Scatter/Gather need be destroy > * @param sg_count- page count of the SG list. > * > */ > static void > storvsc_destroy_bounce_buffer(struct sglist *sgl) > { > struct hv_sgl_node *sgl_node = NULL; > if (LIST_EMPTY(&g_hv_sgl_page_pool.in_use_sgl_list)) { > printf("storvsc error: not enough in use sgl\n"); > return; > } > sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.in_use_sgl_list); > LIST_REMOVE(sgl_node, link); > sgl_node->sgl_data = sgl; > LIST_INSERT_HEAD(&g_hv_sgl_page_pool.free_sgl_list, sgl_node, link); > } > > /** > * @brief create bounce buffer > * > * This function is responsible for create a Scatter/Gather list, > * which hold several pages that can be aligned with page size. > * > * @param seg_count- SG-list segments count > * @param write - if WRITE_TYPE, set SG list page used size to 0, > * otherwise set used size to page size. > * > * return NULL if create failed > */ > static struct sglist * > storvsc_create_bounce_buffer(uint16_t seg_count, int write) > { > int i = 0; > struct sglist *bounce_sgl = NULL; > unsigned int buf_len = ((write == WRITE_TYPE) ? 0 : PAGE_SIZE); > struct hv_sgl_node *sgl_node = NULL; > > /* get struct sglist from free_sgl_list */ > if (LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { > printf("storvsc error: not enough free sgl\n"); > return NULL; > } > sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); > LIST_REMOVE(sgl_node, link); > bounce_sgl = sgl_node->sgl_data; > LIST_INSERT_HEAD(&g_hv_sgl_page_pool.in_use_sgl_list, sgl_node, link); > > bounce_sgl->sg_maxseg = seg_count; > > if (write == WRITE_TYPE) > bounce_sgl->sg_nseg = 0; > else > bounce_sgl->sg_nseg = seg_count; > > for (i = 0; i < seg_count; i++) > bounce_sgl->sg_segs[i].ss_len = buf_len; > > return bounce_sgl; > } > > /** > * @brief copy data from SG list to bounce buffer > * > * This function is responsible for copy data from one SG list's segments > * to another SG list which used as bounce buffer. > * > * @param bounce_sgl - the destination SG list > * @param orig_sgl - the segment of the source SG list. > * @param orig_sgl_count - the count of segments. > * @param orig_sgl_count - indicate which segment need bounce buffer, > * set 1 means need. > * > */ > static void > storvsc_copy_sgl_to_bounce_buf(struct sglist *bounce_sgl, > bus_dma_segment_t *orig_sgl, > unsigned int orig_sgl_count, > uint64_t seg_bits) > { > int src_sgl_idx = 0; > > for (src_sgl_idx = 0; src_sgl_idx < orig_sgl_count; src_sgl_idx++) { > if (seg_bits & (1 << src_sgl_idx)) { > memcpy((void*)bounce_sgl->sg_segs[src_sgl_idx].ss_paddr, > (void*)orig_sgl[src_sgl_idx].ds_addr, > orig_sgl[src_sgl_idx].ds_len); > > bounce_sgl->sg_segs[src_sgl_idx].ss_len = > orig_sgl[src_sgl_idx].ds_len; > } > } > } > > /** > * @brief copy data from SG list which used as bounce to another SG list > * > * This function is responsible for copy data from one SG list with bounce > * buffer to another SG list's segments. > * > * @param dest_sgl - the destination SG list's segments > * @param dest_sgl_count - the count of destination SG list's segment. > * @param src_sgl - the source SG list. > * @param seg_bits - indicate which segment used bounce buffer of src SG-list. > * > */ > void > storvsc_copy_from_bounce_buf_to_sgl(bus_dma_segment_t *dest_sgl, > unsigned int dest_sgl_count, > struct sglist* src_sgl, > uint64_t seg_bits) > { > int sgl_idx = 0; > > for (sgl_idx = 0; sgl_idx < dest_sgl_count; sgl_idx++) { > if (seg_bits & (1 << sgl_idx)) { > memcpy((void*)(dest_sgl[sgl_idx].ds_addr), > (void*)(src_sgl->sg_segs[sgl_idx].ss_paddr), > src_sgl->sg_segs[sgl_idx].ss_len); > } > } > } > > /** > * @brief check SG list with bounce buffer or not > * > * This function is responsible for check if need bounce buffer for SG list. > * > * @param sgl - the SG list's segments > * @param sg_count - the count of SG list's segment. > * @param bits - segmengs number that need bounce buffer > * > * return -1 if SG list needless bounce buffer > */ > static int > storvsc_check_bounce_buffer_sgl(bus_dma_segment_t *sgl, > unsigned int sg_count, > uint64_t *bits) > { > int i = 0; > int offset = 0; > uint64_t phys_addr = 0; > uint64_t tmp_bits = 0; > boolean_t found_hole = FALSE; > boolean_t pre_aligned = TRUE; > > if (sg_count < 2){ > return -1; > } > > *bits = 0; > > phys_addr = vtophys(sgl[0].ds_addr); > offset = phys_addr - trunc_page(phys_addr); > > if (offset != 0) { > pre_aligned = FALSE; > tmp_bits |= 1; > } > > for (i = 1; i < sg_count; i++) { > phys_addr = vtophys(sgl[i].ds_addr); > offset = phys_addr - trunc_page(phys_addr); > > if (offset == 0) { > if (FALSE == pre_aligned){ > /* > * This segment is aligned, if the previous > * one is not aligned, find a hole > */ > found_hole = TRUE; > } > pre_aligned = TRUE; > } else { > tmp_bits |= 1 << i; > if (!pre_aligned) { > if (phys_addr != vtophys(sgl[i-1].ds_addr + > sgl[i-1].ds_len)) { > /* > * Check whether connect to previous > * segment,if not, find the hole > */ > found_hole = TRUE; > } > } else { > found_hole = TRUE; > } > pre_aligned = FALSE; > } > } > > if (!found_hole) { > return (-1); > } else { > *bits = tmp_bits; > return 0; > } > } > > /** > * @brief Fill in a request structure based on a CAM control block > * > * Fills in a request structure based on the contents of a CAM control > * block. The request structure holds the payload information for > * VSCSI protocol request. > * > * @param ccb pointer to a CAM contorl block > * @param reqp pointer to a request structure > */ > static int > create_storvsc_request(union ccb *ccb, struct hv_storvsc_request *reqp) > { > struct ccb_scsiio *csio = &ccb->csio; > uint64_t phys_addr; > uint32_t bytes_to_copy = 0; > uint32_t pfn_num = 0; > uint32_t pfn; > uint64_t not_aligned_seg_bits = 0; > > /* refer to struct vmscsi_req for meanings of these two fields */ > reqp->vstor_packet.u.vm_srb.port = > cam_sim_unit(xpt_path_sim(ccb->ccb_h.path)); > reqp->vstor_packet.u.vm_srb.path_id = > cam_sim_bus(xpt_path_sim(ccb->ccb_h.path)); > > reqp->vstor_packet.u.vm_srb.target_id = ccb->ccb_h.target_id; > reqp->vstor_packet.u.vm_srb.lun = ccb->ccb_h.target_lun; > > reqp->vstor_packet.u.vm_srb.cdb_len = csio->cdb_len; > if(ccb->ccb_h.flags & CAM_CDB_POINTER) { > memcpy(&reqp->vstor_packet.u.vm_srb.u.cdb, csio->cdb_io.cdb_ptr, > csio->cdb_len); > } else { > memcpy(&reqp->vstor_packet.u.vm_srb.u.cdb, csio->cdb_io.cdb_bytes, > csio->cdb_len); > } > > switch (ccb->ccb_h.flags & CAM_DIR_MASK) { > case CAM_DIR_OUT: > reqp->vstor_packet.u.vm_srb.data_in = WRITE_TYPE; > break; > case CAM_DIR_IN: > reqp->vstor_packet.u.vm_srb.data_in = READ_TYPE; > break; > case CAM_DIR_NONE: > reqp->vstor_packet.u.vm_srb.data_in = UNKNOWN_TYPE; > break; > default: > reqp->vstor_packet.u.vm_srb.data_in = UNKNOWN_TYPE; > break; > } > > reqp->sense_data = &csio->sense_data; > reqp->sense_info_len = csio->sense_len; > > reqp->ccb = ccb; > > if (0 == csio->dxfer_len) { > return (0); > } > > reqp->data_buf.length = csio->dxfer_len; > > switch (ccb->ccb_h.flags & CAM_DATA_MASK) { > case CAM_DATA_VADDR: > { > bytes_to_copy = csio->dxfer_len; > phys_addr = vtophys(csio->data_ptr); > reqp->data_buf.offset = phys_addr & PAGE_MASK; > > while (bytes_to_copy != 0) { > int bytes, page_offset; > phys_addr = > vtophys(&csio->data_ptr[reqp->data_buf.length - > bytes_to_copy]); > pfn = phys_addr >> PAGE_SHIFT; > reqp->data_buf.pfn_array[pfn_num] = pfn; > page_offset = phys_addr & PAGE_MASK; > > bytes = min(PAGE_SIZE - page_offset, bytes_to_copy); > > bytes_to_copy -= bytes; > pfn_num++; > } > break; > } > > case CAM_DATA_SG: > { > int i = 0; > int offset = 0; > int ret; > > bus_dma_segment_t *storvsc_sglist = > (bus_dma_segment_t *)ccb->csio.data_ptr; > u_int16_t storvsc_sg_count = ccb->csio.sglist_cnt; > > printf("Storvsc: get SG I/O operation, %d\n", > reqp->vstor_packet.u.vm_srb.data_in); > > if (storvsc_sg_count > HV_MAX_MULTIPAGE_BUFFER_COUNT){ > printf("Storvsc: %d segments is too much, " > "only support %d segments\n", > storvsc_sg_count, HV_MAX_MULTIPAGE_BUFFER_COUNT); > return (EINVAL); > } > > /* > * We create our own bounce buffer function currently. Idealy > * we should use BUS_DMA(9) framework. But with current BUS_DMA > * code there is no callback API to check the page alignment of > * middle segments before busdma can decide if a bounce buffer > * is needed for particular segment. There is callback, > * "bus_dma_filter_t *filter", but the parrameters are not > * sufficient for storvsc driver. > * TODO: > * Add page alignment check in BUS_DMA(9) callback. Once > * this is complete, switch the following code to use > * BUS_DMA(9) for storvsc bounce buffer support. > */ > /* check if we need to create bounce buffer */ > ret = storvsc_check_bounce_buffer_sgl(storvsc_sglist, > storvsc_sg_count, ¬_aligned_seg_bits); > if (ret != -1) { > reqp->bounce_sgl = > storvsc_create_bounce_buffer(storvsc_sg_count, > reqp->vstor_packet.u.vm_srb.data_in); > if (NULL == reqp->bounce_sgl) { > printf("Storvsc_error: " > "create bounce buffer failed.\n"); > return (ENOMEM); > } > > reqp->bounce_sgl_count = storvsc_sg_count; > reqp->not_aligned_seg_bits = not_aligned_seg_bits; > > /* > * if it is write, we need copy the original data > *to bounce buffer > */ > if (WRITE_TYPE == reqp->vstor_packet.u.vm_srb.data_in) { > storvsc_copy_sgl_to_bounce_buf( > reqp->bounce_sgl, > storvsc_sglist, > storvsc_sg_count, > reqp->not_aligned_seg_bits); > } > > /* transfer virtual address to physical frame number */ > if (reqp->not_aligned_seg_bits & 0x1){ > phys_addr = > vtophys(reqp->bounce_sgl->sg_segs[0].ss_paddr); > }else{ > phys_addr = > vtophys(storvsc_sglist[0].ds_addr); > } > reqp->data_buf.offset = phys_addr & PAGE_MASK; > > pfn = phys_addr >> PAGE_SHIFT; > reqp->data_buf.pfn_array[0] = pfn; > > for (i = 1; i < storvsc_sg_count; i++) { > if (reqp->not_aligned_seg_bits & (1 << i)) { > phys_addr = > vtophys(reqp->bounce_sgl->sg_segs[i].ss_paddr); > } else { > phys_addr = > vtophys(storvsc_sglist[i].ds_addr); > } > > pfn = phys_addr >> PAGE_SHIFT; > reqp->data_buf.pfn_array[i] = pfn; > } > } else { > phys_addr = vtophys(storvsc_sglist[0].ds_addr); > > reqp->data_buf.offset = phys_addr & PAGE_MASK; > > for (i = 0; i < storvsc_sg_count; i++) { > phys_addr = vtophys(storvsc_sglist[i].ds_addr); > pfn = phys_addr >> PAGE_SHIFT; > reqp->data_buf.pfn_array[i] = pfn; > } > > /* check the last segment cross boundary or not */ > offset = phys_addr & PAGE_MASK; > if (offset) { > phys_addr = > vtophys(storvsc_sglist[i-1].ds_addr + > PAGE_SIZE - offset); > pfn = phys_addr >> PAGE_SHIFT; > reqp->data_buf.pfn_array[i] = pfn; > } > > reqp->bounce_sgl_count = 0; > } > break; > } > default: > printf("Unknow flags: %d\n", ccb->ccb_h.flags); > return(EINVAL); > } > > return(0); > } > > /* > * Modified based on scsi_print_inquiry which is responsible to > * print the detail information for scsi_inquiry_data. > * > * Return 1 if it is valid, 0 otherwise. > */ > static inline int > is_inquiry_valid(const struct scsi_inquiry_data *inq_data) > { > uint8_t type; > char vendor[16], product[48], revision[16]; > > /* > * Check device type and qualifier > */ > if (!(SID_QUAL_IS_VENDOR_UNIQUE(inq_data) || > SID_QUAL(inq_data) == SID_QUAL_LU_CONNECTED)) > return (0); > > type = SID_TYPE(inq_data); > switch (type) { > case T_DIRECT: > case T_SEQUENTIAL: > case T_PRINTER: > case T_PROCESSOR: > case T_WORM: > case T_CDROM: > case T_SCANNER: > case T_OPTICAL: > case T_CHANGER: > case T_COMM: > case T_STORARRAY: > case T_ENCLOSURE: > case T_RBC: > case T_OCRW: > case T_OSD: > case T_ADC: > break; > case T_NODEVICE: > default: > return (0); > } > > /* > * Check vendor, product, and revision > */ > cam_strvis(vendor, inq_data->vendor, sizeof(inq_data->vendor), > sizeof(vendor)); > cam_strvis(product, inq_data->product, sizeof(inq_data->product), > sizeof(product)); > cam_strvis(revision, inq_data->revision, sizeof(inq_data->revision), > sizeof(revision)); > if (strlen(vendor) == 0 || > strlen(product) == 0 || > strlen(revision) == 0) > return (0); > > return (1); > } > > /** > * @brief completion function before returning to CAM > * > * I/O process has been completed and the result needs > * to be passed to the CAM layer. > * Free resources related to this request. > * > * @param reqp pointer to a request structure > */ > static void > storvsc_io_done(struct hv_storvsc_request *reqp) > { > union ccb *ccb = reqp->ccb; > struct ccb_scsiio *csio = &ccb->csio; > struct storvsc_softc *sc = reqp->softc; > struct vmscsi_req *vm_srb = &reqp->vstor_packet.u.vm_srb; > bus_dma_segment_t *ori_sglist = NULL; > int ori_sg_count = 0; > > /* destroy bounce buffer if it is used */ > if (reqp->bounce_sgl_count) { > ori_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr; > ori_sg_count = ccb->csio.sglist_cnt; > > /* > * If it is READ operation, we should copy back the data > * to original SG list. > */ > if (READ_TYPE == reqp->vstor_packet.u.vm_srb.data_in) { > storvsc_copy_from_bounce_buf_to_sgl(ori_sglist, > ori_sg_count, > reqp->bounce_sgl, > reqp->not_aligned_seg_bits); > } > > storvsc_destroy_bounce_buffer(reqp->bounce_sgl); > reqp->bounce_sgl_count = 0; > } > > if (reqp->retries > 0) { > mtx_lock(&sc->hs_lock); > #if HVS_TIMEOUT_TEST > xpt_print(ccb->ccb_h.path, > "%u: IO returned after timeout, " > "waking up timer handler if any.\n", ticks); > mtx_lock(&reqp->event.mtx); > cv_signal(&reqp->event.cv); > mtx_unlock(&reqp->event.mtx); > #endif > reqp->retries = 0; > xpt_print(ccb->ccb_h.path, > "%u: IO returned after timeout, " > "stopping timer if any.\n", ticks); > mtx_unlock(&sc->hs_lock); > } > > #ifdef notyet > /* > * callout_drain() will wait for the timer handler to finish > * if it is running. So we don't need any lock to synchronize > * between this routine and the timer handler. > * Note that we need to make sure reqp is not freed when timer > * handler is using or will use it. > */ > if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) { > callout_drain(&reqp->callout); > } > #endif > > ccb->ccb_h.status &= ~CAM_SIM_QUEUED; > ccb->ccb_h.status &= ~CAM_STATUS_MASK; > if (vm_srb->scsi_status == SCSI_STATUS_OK) { > const struct scsi_generic *cmd; >- > /* > * Check whether the data for INQUIRY cmd is valid or > * not. Windows 10 and Windows 2016 send all zero > * inquiry data to VM even for unpopulated slots. > */ > cmd = (const struct scsi_generic *) > ((ccb->ccb_h.flags & CAM_CDB_POINTER) ? > csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); >- if (cmd->opcode == INQUIRY && >- /* >- * XXX: Temporary work around disk hot plugin on win2k12r2, >- * only filtering the invalid disk on win10 or 2016 server. >- * So, the hot plugin on win10 and 2016 server needs >- * to be fixed. >+ if (cmd->opcode == INQUIRY) { >+ /* >+ * The host of Windows 10 or 2016 server will response >+ * the inquiry request with invalid data for unexisted device: >+ [0x7f 0x0 0x5 0x2 0x1f ... ] >+ * But on windows 2012 R2, the response is: >+ [0x7f 0x0 0x0 0x0 0x0 ] >+ * That is why here wants to validate the inquiry response. >+ * The validation will skip the INQUIRY whose response is short, >+ * which is less than SHORT_INQUIRY_LENGTH (36). >+ * >+ * For more information about INQUIRY, please refer to: >+ * ftp://ftp.avc-pioneer.com/Mtfuji_7/Proposal/Jun09/INQUIRY.pdf > */ >- vmstor_proto_version == VMSTOR_PROTOCOL_VERSION_WIN10 && >- is_inquiry_valid( >- (const struct scsi_inquiry_data *)csio->data_ptr) == 0) { >+ const struct scsi_inquiry_data *inq_data = >+ (const struct scsi_inquiry_data *)csio->data_ptr; >+ uint8_t* resp_buf = (uint8_t*)csio->data_ptr; >+ /* Get the response buffer length */ >+ int resp_buf_len = resp_buf[4] + 5; >+ /* The request buffer length is the response buffer capacity */ >+ int req_buf_len = csio->dxfer_len; >+ int data_len = (resp_buf_len < req_buf_len) ? resp_buf_len : req_buf_len; >+ if (data_len < SHORT_INQUIRY_LENGTH) { >+ ccb->ccb_h.status |= CAM_REQ_CMP; >+ if (bootverbose) { >+ mtx_lock(&sc->hs_lock); >+ xpt_print(ccb->ccb_h.path, >+ "storvsc skips the validation for short inquiry (%d)" >+ " [%x %x %x %x %x]\n", >+ data_len,resp_buf[0],resp_buf[1],resp_buf[2], >+ resp_buf[3],resp_buf[4]); >+ mtx_unlock(&sc->hs_lock); >+ } >+ } else if (is_inquiry_valid(inq_data) == 0) { > ccb->ccb_h.status |= CAM_DEV_NOT_THERE; > if (bootverbose) { > mtx_lock(&sc->hs_lock); > xpt_print(ccb->ccb_h.path, >- "storvsc uninstalled device\n"); >+ "storvsc uninstalled invalid device" >+ " [%x %x %x %x %x]\n", >+ resp_buf[0],resp_buf[1],resp_buf[2],resp_buf[3],resp_buf[4]); >+ mtx_unlock(&sc->hs_lock); >+ } >+ } else { >+ ccb->ccb_h.status |= CAM_REQ_CMP; >+ if (bootverbose) { >+ mtx_lock(&sc->hs_lock); >+ xpt_print(ccb->ccb_h.path, >+ "storvsc has passed inquiry response (%d) validation\n", >+ data_len); > mtx_unlock(&sc->hs_lock); > } >+ } > } else { > ccb->ccb_h.status |= CAM_REQ_CMP; > } > } else { > mtx_lock(&sc->hs_lock); > xpt_print(ccb->ccb_h.path, > "storvsc scsi_status = %d\n", > vm_srb->scsi_status); > mtx_unlock(&sc->hs_lock); > ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; > } > > ccb->csio.scsi_status = (vm_srb->scsi_status & 0xFF); > ccb->csio.resid = ccb->csio.dxfer_len - vm_srb->transfer_len; > > if (reqp->sense_info_len != 0) { > csio->sense_resid = csio->sense_len - reqp->sense_info_len; > ccb->ccb_h.status |= CAM_AUTOSNS_VALID; > } > > mtx_lock(&sc->hs_lock); > if (reqp->softc->hs_frozen == 1) { > xpt_print(ccb->ccb_h.path, > "%u: storvsc unfreezing softc 0x%p.\n", > ticks, reqp->softc); > ccb->ccb_h.status |= CAM_RELEASE_SIMQ; > reqp->softc->hs_frozen = 0; > } > storvsc_free_request(sc, reqp); > mtx_unlock(&sc->hs_lock); > > xpt_done_direct(ccb); > } > > /** > * @brief Free a request structure > * > * Free a request structure by returning it to the free list > * > * @param sc pointer to a softc > * @param reqp pointer to a request structure > */ > static void > storvsc_free_request(struct storvsc_softc *sc, struct hv_storvsc_request *reqp) > { > > LIST_INSERT_HEAD(&sc->hs_free_list, reqp, link); > } > > /** > * @brief Determine type of storage device from GUID > * > * Using the type GUID, determine if this is a StorVSC (paravirtual > * SCSI or BlkVSC (paravirtual IDE) device. > * > * @param dev a device > * returns an enum > */ > static enum hv_storage_type > storvsc_get_storage_type(device_t dev) > { > const char *p = vmbus_get_type(dev); > > if (!memcmp(p, &gBlkVscDeviceType, sizeof(hv_guid))) { > return DRIVER_BLKVSC; > } else if (!memcmp(p, &gStorVscDeviceType, sizeof(hv_guid))) { > return DRIVER_STORVSC; > } > return (DRIVER_UNKNOWN); > } >
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