| hv_storvsc_drv_freebsd.c (299505) | hv_storvsc_drv_freebsd.c (300050) |
|---|---|
| 1/*- 2 * Copyright (c) 2009-2012,2016 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 19 unchanged lines hidden (view full) --- 28 29/** 30 * StorVSC driver for Hyper-V. This driver presents a SCSI HBA interface 31 * to the Comman Access Method (CAM) layer. CAM control blocks (CCBs) are 32 * converted into VSCSI protocol messages which are delivered to the parent 33 * partition StorVSP driver over the Hyper-V VMBUS. 34 */ 35#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2009-2012,2016 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 19 unchanged lines hidden (view full) --- 28 29/** 30 * StorVSC driver for Hyper-V. This driver presents a SCSI HBA interface 31 * to the Comman Access Method (CAM) layer. CAM control blocks (CCBs) are 32 * converted into VSCSI protocol messages which are delivered to the parent 33 * partition StorVSP driver over the Hyper-V VMBUS. 34 */ 35#include <sys/cdefs.h> |
| 36__FBSDID("$FreeBSD: head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c 299505 2016-05-12 03:29:29Z sephe $"); | 36__FBSDID("$FreeBSD: head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c 300050 2016-05-17 12:52:31Z eadler $"); |
| 37 38#include <sys/param.h> 39#include <sys/proc.h> 40#include <sys/condvar.h> 41#include <sys/time.h> 42#include <sys/systm.h> 43#include <sys/sockio.h> 44#include <sys/mbuf.h> --- 254 unchanged lines hidden (view full) --- 299/** 300 * The host is capable of sending messages to us that are 301 * completely unsolicited. So, we need to address the race 302 * condition where we may be in the process of unloading the 303 * driver when the host may send us an unsolicited message. 304 * We address this issue by implementing a sequentially 305 * consistent protocol: 306 * | 37 38#include <sys/param.h> 39#include <sys/proc.h> 40#include <sys/condvar.h> 41#include <sys/time.h> 42#include <sys/systm.h> 43#include <sys/sockio.h> 44#include <sys/mbuf.h> --- 254 unchanged lines hidden (view full) --- 299/** 300 * The host is capable of sending messages to us that are 301 * completely unsolicited. So, we need to address the race 302 * condition where we may be in the process of unloading the 303 * driver when the host may send us an unsolicited message. 304 * We address this issue by implementing a sequentially 305 * consistent protocol: 306 * |
| 307 * 1. Channel callback is invoked while holding the the channel lock | 307 * 1. Channel callback is invoked while holding the channel lock |
| 308 * and an unloading driver will reset the channel callback under 309 * the protection of this channel lock. 310 * 311 * 2. To ensure bounded wait time for unloading a driver, we don't 312 * permit outgoing traffic once the device is marked as being 313 * destroyed. 314 * 315 * 3. Once the device is marked as being destroyed, we only --- 1855 unchanged lines hidden --- | 308 * and an unloading driver will reset the channel callback under 309 * the protection of this channel lock. 310 * 311 * 2. To ensure bounded wait time for unloading a driver, we don't 312 * permit outgoing traffic once the device is marked as being 313 * destroyed. 314 * 315 * 3. Once the device is marked as being destroyed, we only --- 1855 unchanged lines hidden --- |