diff options
Diffstat (limited to 'src/VBox/Additions/darwin/VBoxSF/VBoxSF.cpp')
| -rw-r--r-- | src/VBox/Additions/darwin/VBoxSF/VBoxSF.cpp | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/VBox/Additions/darwin/VBoxSF/VBoxSF.cpp b/src/VBox/Additions/darwin/VBoxSF/VBoxSF.cpp new file mode 100644 index 00000000..a89d63c8 --- /dev/null +++ b/src/VBox/Additions/darwin/VBoxSF/VBoxSF.cpp @@ -0,0 +1,261 @@ +/* $Id: VBoxSF.cpp $ */ +/** @file + * VBoxSF - Darwin Shared Folders, KEXT entry points. + */ + +/* + * Copyright (C) 2013-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP LOG_GROUP_SHARED_FOLDERS +#include "VBoxSFInternal.h" + +#include <iprt/asm.h> +#include <iprt/assert.h> +#include <iprt/initterm.h> +#include <VBox/version.h> +#include <VBox/log.h> + + +/********************************************************************************************************************************* +* Internal Functions * +*********************************************************************************************************************************/ +static kern_return_t vboxSfDwnModuleLoad(struct kmod_info *pKModInfo, void *pvData); +static kern_return_t vboxSfDwnModuleUnload(struct kmod_info *pKModInfo, void *pvData); + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** The VBoxGuest service if we've managed to connect to it already. */ +static IOService *g_pVBoxGuest = NULL; +/** The shared folder service client structure. */ +VBGLSFCLIENT g_SfClientDarwin = { UINT32_MAX, NULL }; +/** Number of active mounts. Used for unload prevention. */ +uint32_t volatile g_cVBoxSfMounts = 0; + +/** VFS table entry for our file system (for vfs_fsremove). */ +static vfstable_t g_pVBoxSfVfsTableEntry; +/** For vfs_fsentry. */ +static struct vnodeopv_desc *g_apVBoxSfVnodeOpDescList[] = +{ + &g_VBoxSfVnodeOpvDesc, +}; +/** VFS registration structure. */ +static struct vfs_fsentry g_VBoxSfFsEntry = +{ + .vfe_vfsops = &g_VBoxSfVfsOps, + .vfe_vopcnt = RT_ELEMENTS(g_apVBoxSfVnodeOpDescList), + .vfe_opvdescs = g_apVBoxSfVnodeOpDescList, + .vfe_fstypenum = -1, + .vfe_fsname = VBOXSF_DARWIN_FS_NAME, + .vfe_flags = VFS_TBLTHREADSAFE /* Required. */ + | VFS_TBLFSNODELOCK /* Required. */ + | VFS_TBLNOTYPENUM /* No historic file system number. */ + | VFS_TBL64BITREADY, /* Can handle 64-bit processes */ + /** @todo add VFS_TBLREADDIR_EXTENDED */ + .vfe_reserv = { NULL, NULL }, +}; + + +/** + * Declare the module stuff. + */ +RT_C_DECLS_BEGIN +extern kern_return_t _start(struct kmod_info *pKModInfo, void *pvData); +extern kern_return_t _stop(struct kmod_info *pKModInfo, void *pvData); + +KMOD_EXPLICIT_DECL(VBoxSF, VBOX_VERSION_STRING, _start, _stop) +DECL_HIDDEN_DATA(kmod_start_func_t *) _realmain = vboxSfDwnModuleLoad; +DECL_HIDDEN_DATA(kmod_stop_func_t *) _antimain = vboxSfDwnModuleUnload; +DECL_HIDDEN_DATA(int) _kext_apple_cc = __APPLE_CC__; +RT_C_DECLS_END + + +/** + * Connect to VBoxGuest and host shared folders service. + * + * @returns true if connected, false if not. + */ +bool vboxSfDwnConnect(void) +{ + /* + * Grab VBoxGuest - since it's a dependency of this module, it shouldn't be hard. + */ + if (!g_pVBoxGuest) + { + OSDictionary *pServiceMatcher = IOService::serviceMatching("org_virtualbox_VBoxGuest"); + if (pServiceMatcher) + { + IOService *pVBoxGuest = IOService::waitForMatchingService(pServiceMatcher, 10 * RT_NS_1SEC); + if (pVBoxGuest) + g_pVBoxGuest = pVBoxGuest; + else + LogRel(("vboxSfDwnConnect: IOService::waitForMatchingService failed!!\n")); + } + else + LogRel(("vboxSfDwnConnect: serviceMatching failed\n")); + } + + if (g_pVBoxGuest) + { + /* + * Get hold of the shared folders service if we haven't already. + */ + if (g_SfClientDarwin.handle != NULL) + return true; + + int rc = VbglR0SfConnect(&g_SfClientDarwin); + if (RT_SUCCESS(rc)) + { + rc = VbglR0SfSetUtf8(&g_SfClientDarwin); + if (RT_SUCCESS(rc)) + return true; + + LogRel(("VBoxSF: VbglR0SfSetUtf8 failed: %Rrc\n", rc)); + + VbglR0SfDisconnect(&g_SfClientDarwin); + g_SfClientDarwin.handle = NULL; + } + else + LogRel(("VBoxSF: VbglR0SfConnect failed: %Rrc\n", rc)); + } + + return false; +} + + +/** + * Start the kernel module. + */ +static kern_return_t vboxSfDwnModuleLoad(struct kmod_info *pKModInfo, void *pvData) +{ + RT_NOREF(pKModInfo, pvData); +#ifdef DEBUG + printf("vboxSfDwnModuleLoad\n"); + RTLogBackdoorPrintf("vboxSfDwnModuleLoad\n"); +#endif + + /* + * Initialize IPRT and the ring-0 guest library. + */ + int rc = RTR0Init(0); + if (RT_SUCCESS(rc)) + { + rc = VbglR0SfInit(); + if (RT_SUCCESS(rc)) + { + /* + * Register the file system. + */ + rc = vfs_fsadd(&g_VBoxSfFsEntry, &g_pVBoxSfVfsTableEntry); + if (rc == 0) + { + /* + * Try find VBoxGuest and connect to the shared folders service on the host. + */ + /** @todo should we just ignore the error here and retry at mount time? + * Technically, VBoxGuest should be available since it's one of our + * dependencies... */ + vboxSfDwnConnect(); + + /* + * We're done for now. We'll deal with + */ + LogRel(("VBoxSF: loaded\n")); + return KERN_SUCCESS; + } + + printf("VBoxSF: vfs_fsadd failed: %d\n", rc); + RTLogBackdoorPrintf("VBoxSF: vfs_fsadd failed: %d\n", rc); + VbglR0SfTerm(); + } + else + { + printf("VBoxSF: VbglR0SfInit failed: %d\n", rc); + RTLogBackdoorPrintf("VBoxSF: VbglR0SfInit failed: %Rrc\n", rc); + } + RTR0Term(); + } + else + { + printf("VBoxSF: RTR0Init failed: %d\n", rc); + RTLogBackdoorPrintf("VBoxSF: RTR0Init failed: %Rrc\n", rc); + } + return KERN_FAILURE; +} + + +/** + * Stop the kernel module. + */ +static kern_return_t vboxSfDwnModuleUnload(struct kmod_info *pKModInfo, void *pvData) +{ + RT_NOREF(pKModInfo, pvData); +#ifdef DEBUG + printf("vboxSfDwnModuleUnload\n"); + RTLogBackdoorPrintf("vboxSfDwnModuleUnload\n"); +#endif + + + /* + * Are we busy? If so fail. Otherwise try deregister the file system. + */ + if (g_cVBoxSfMounts > 0) + { + LogRel(("VBoxSF: Refusing to unload with %u active mounts\n", g_cVBoxSfMounts)); + return KERN_NO_ACCESS; + } + + if (g_pVBoxSfVfsTableEntry) + { + int rc = vfs_fsremove(g_pVBoxSfVfsTableEntry); + if (rc != 0) + { + LogRel(("VBoxSF: vfs_fsremove failed: %d\n", rc)); + return KERN_NO_ACCESS; + } + } + + /* + * Disconnect and terminate libraries we're using. + */ + if (g_SfClientDarwin.handle != NULL) + { + VbglR0SfDisconnect(&g_SfClientDarwin); + g_SfClientDarwin.handle = NULL; + } + + if (g_pVBoxGuest) + { + g_pVBoxGuest->release(); + g_pVBoxGuest = NULL; + } + + VbglR0SfTerm(); + RTR0Term(); + return KERN_SUCCESS; +} + |