diff options
Diffstat (limited to 'src/VBox/Additions/common/VBoxService/VBoxServiceAutoMount.cpp')
| -rw-r--r-- | src/VBox/Additions/common/VBoxService/VBoxServiceAutoMount.cpp | 2194 |
1 files changed, 2194 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxService/VBoxServiceAutoMount.cpp b/src/VBox/Additions/common/VBoxService/VBoxServiceAutoMount.cpp new file mode 100644 index 00000000..75bf718a --- /dev/null +++ b/src/VBox/Additions/common/VBoxService/VBoxServiceAutoMount.cpp @@ -0,0 +1,2194 @@ +/* $Id: VBoxServiceAutoMount.cpp $ */ +/** @file + * VBoxService - Auto-mounting for Shared Folders, only Linux & Solaris atm. + */ + +/* + * Copyright (C) 2010-2023 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 + */ + + +/** @page pg_vgsvc_automount VBoxService - Shared Folder Automounter + * + * The Shared Folder Automounter subservice mounts shared folders upon request + * from the host. + * + * This retrieves shared folder automount requests from Main via the VMMDev. + * The current implemention only does this once, for some inexplicable reason, + * so the run-time addition of automounted shared folders are not heeded. + * + * This subservice is only used on linux and solaris. On Windows the current + * thinking is this is better of done from VBoxTray, some one argue that for + * drive letter assigned shared folders it would be better to do some magic here + * (obviously not involving NDAddConnection). + * + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/assert.h> +#include <iprt/ctype.h> +#include <iprt/dir.h> +#include <iprt/mem.h> +#include <iprt/path.h> +#include <iprt/semaphore.h> +#include <iprt/sort.h> +#include <iprt/string.h> +#include <VBox/err.h> +#include <VBox/VBoxGuestLib.h> +#include <VBox/shflsvc.h> +#include "VBoxServiceInternal.h" +#include "VBoxServiceUtils.h" + +#ifdef RT_OS_WINDOWS +#elif defined(RT_OS_OS2) +# define INCL_DOSFILEMGR +# define INCL_ERRORS +# define OS2EMX_PLAIN_CHAR +# include <os2emx.h> +#else +# include <errno.h> +# include <grp.h> +# include <sys/mount.h> +# ifdef RT_OS_SOLARIS +# include <sys/mntent.h> +# include <sys/mnttab.h> +# include <sys/vfs.h> +# elif defined(RT_OS_LINUX) +# include <mntent.h> +# include <paths.h> +# include <sys/utsname.h> +RT_C_DECLS_BEGIN +# include "../../linux/sharedfolders/vbsfmount.h" +RT_C_DECLS_END +# else +# error "Port me!" +# endif +# include <unistd.h> +#endif + + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +/** @def VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR + * Default mount directory (unix only). + */ +#ifndef VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR +# define VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR "/media" +#endif + +/** @def VBOXSERVICE_AUTOMOUNT_DEFAULT_PREFIX + * Default mount prefix (unix only). + */ +#ifndef VBOXSERVICE_AUTOMOUNT_DEFAULT_PREFIX +# define VBOXSERVICE_AUTOMOUNT_DEFAULT_PREFIX "sf_" +#endif + +#ifndef _PATH_MOUNTED +# ifdef RT_OS_SOLARIS +# define _PATH_MOUNTED "/etc/mnttab" +# else +# define _PATH_MOUNTED "/etc/mtab" +# endif +#endif + +/** @def VBOXSERVICE_AUTOMOUNT_MIQF + * The drive letter / path mount point flag. */ +#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2) +# define VBOXSERVICE_AUTOMOUNT_MIQF SHFL_MIQF_DRIVE_LETTER +#else +# define VBOXSERVICE_AUTOMOUNT_MIQF SHFL_MIQF_PATH +#endif + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * Automounter mount table entry. + * + * This holds the information returned by SHFL_FN_QUERY_MAP_INFO and + * additional mount state info. We only keep entries for mounted mappings. + */ +typedef struct VBSVCAUTOMOUNTERENTRY +{ + /** The root ID. */ + uint32_t idRoot; + /** The root ID version. */ + uint32_t uRootIdVersion; + /** Map info flags, SHFL_MIF_XXX. */ + uint64_t fFlags; + /** The shared folder (mapping) name. */ + char *pszName; + /** The configured mount point, NULL if none. */ + char *pszMountPoint; + /** The actual mount point, NULL if not mount. */ + char *pszActualMountPoint; +} VBSVCAUTOMOUNTERENTRY; +/** Pointer to an automounter entry. */ +typedef VBSVCAUTOMOUNTERENTRY *PVBSVCAUTOMOUNTERENTRY; + +/** Automounter mount table. */ +typedef struct VBSVCAUTOMOUNTERTABLE +{ + /** Current number of entries in the array. */ + uint32_t cEntries; + /** Max number of entries the array can hold w/o growing it. */ + uint32_t cAllocated; + /** Pointer to an array of entry pointers. */ + PVBSVCAUTOMOUNTERENTRY *papEntries; +} VBSVCAUTOMOUNTERTABLE; +/** Pointer to an automounter mount table. */ +typedef VBSVCAUTOMOUNTERTABLE *PVBSVCAUTOMOUNTERTABLE; + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** The semaphore we're blocking on. */ +static RTSEMEVENTMULTI g_hAutoMountEvent = NIL_RTSEMEVENTMULTI; +/** The Shared Folders service client ID. */ +static uint32_t g_idClientSharedFolders = 0; +/** Set if we can wait on changes to the mappings. */ +static bool g_fHostSupportsWaitAndInfoQuery = false; + +#ifdef RT_OS_OS2 +/** The attachment tag we use to identify attchments that belongs to us. */ +static char const g_szTag[] = "VBoxAutomounter"; +#elif defined(RT_OS_LINUX) +/** Tag option value that lets us identify mounts that belongs to us. */ +static char const g_szTag[] = "VBoxAutomounter"; +#elif defined(RT_OS_SOLARIS) +/** Dummy mount option that lets us identify mounts that belongs to us. */ +static char const g_szTag[] = "VBoxAutomounter"; +#endif + + + +/** + * @interface_method_impl{VBOXSERVICE,pfnInit} + */ +static DECLCALLBACK(int) vbsvcAutomounterInit(void) +{ + VGSvcVerbose(3, "vbsvcAutomounterInit\n"); + + int rc = RTSemEventMultiCreate(&g_hAutoMountEvent); + AssertRCReturn(rc, rc); + + rc = VbglR3SharedFolderConnect(&g_idClientSharedFolders); + if (RT_SUCCESS(rc)) + { + VGSvcVerbose(3, "vbsvcAutomounterInit: Service Client ID: %#x\n", g_idClientSharedFolders); + g_fHostSupportsWaitAndInfoQuery = RT_SUCCESS(VbglR3SharedFolderCancelMappingsChangesWaits(g_idClientSharedFolders)); + } + else + { + /* If the service was not found, we disable this service without + causing VBoxService to fail. */ + if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */ + { + VGSvcVerbose(0, "vbsvcAutomounterInit: Shared Folders service is not available\n"); + rc = VERR_SERVICE_DISABLED; + } + else + VGSvcError("Control: Failed to connect to the Shared Folders service! Error: %Rrc\n", rc); + RTSemEventMultiDestroy(g_hAutoMountEvent); + g_hAutoMountEvent = NIL_RTSEMEVENTMULTI; + } + + return rc; +} + + +#if defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX) /* The old code: */ + +/** + * @todo Integrate into RTFsQueryMountpoint()? + */ +static bool vbsvcAutoMountShareIsMountedOld(const char *pszShare, char *pszMountPoint, size_t cbMountPoint) +{ + AssertPtrReturn(pszShare, false); + AssertPtrReturn(pszMountPoint, false); + AssertReturn(cbMountPoint, false); + + bool fMounted = false; + +# if defined(RT_OS_SOLARIS) + /** @todo What to do if we have a relative path in mtab instead + * of an absolute one ("temp" vs. "/media/temp")? + * procfs contains the full path but not the actual share name ... + * FILE *pFh = setmntent("/proc/mounts", "r+t"); */ + FILE *pFh = fopen(_PATH_MOUNTED, "r"); + if (!pFh) + VGSvcError("vbsvcAutoMountShareIsMountedOld: Could not open mount tab '%s'!\n", _PATH_MOUNTED); + else + { + mnttab mntTab; + while ((getmntent(pFh, &mntTab))) + { + if (!RTStrICmp(mntTab.mnt_special, pszShare)) + { + fMounted = RTStrPrintf(pszMountPoint, cbMountPoint, "%s", mntTab.mnt_mountp) + ? true : false; + break; + } + } + fclose(pFh); + } +# elif defined(RT_OS_LINUX) + FILE *pFh = setmntent(_PATH_MOUNTED, "r+t"); /** @todo r=bird: why open it for writing? (the '+') */ + if (pFh == NULL) + VGSvcError("vbsvcAutoMountShareIsMountedOld: Could not open mount tab '%s'!\n", _PATH_MOUNTED); + else + { + mntent *pMntEnt; + while ((pMntEnt = getmntent(pFh))) + { + if (!RTStrICmp(pMntEnt->mnt_fsname, pszShare)) + { + fMounted = RTStrPrintf(pszMountPoint, cbMountPoint, "%s", pMntEnt->mnt_dir) + ? true : false; + break; + } + } + endmntent(pFh); + } +# else +# error "PORTME!" +# endif + + VGSvcVerbose(4, "vbsvcAutoMountShareIsMountedOld: Share '%s' at mount point '%s' = %s\n", + pszShare, fMounted ? pszMountPoint : "<None>", fMounted ? "Yes" : "No"); + return fMounted; +} + + +/** + * Unmounts a shared folder. + * + * @returns VBox status code + * @param pszMountPoint The shared folder mount point. + */ +static int vbsvcAutoMountUnmountOld(const char *pszMountPoint) +{ + AssertPtrReturn(pszMountPoint, VERR_INVALID_PARAMETER); + + int rc = VINF_SUCCESS; + uint8_t uTries = 0; + int r; + while (uTries++ < 3) + { + r = umount(pszMountPoint); + if (r == 0) + break; +/** @todo r=bird: Why do sleep 5 seconds after the final retry? + * May also be a good idea to check for EINVAL or other signs that someone + * else have already unmounted the share. */ + RTThreadSleep(5000); /* Wait a while ... */ + } + if (r == -1) /** @todo r=bird: RTThreadSleep set errno. */ + rc = RTErrConvertFromErrno(errno); + return rc; +} + + +/** + * Prepares a mount point (create it, set group and mode). + * + * @returns VBox status code + * @param pszMountPoint The mount point. + * @param pszShareName Unused. + * @param gidGroup The group ID. + */ +static int vbsvcAutoMountPrepareMountPointOld(const char *pszMountPoint, const char *pszShareName, RTGID gidGroup) +{ + AssertPtrReturn(pszMountPoint, VERR_INVALID_PARAMETER); + AssertPtrReturn(pszShareName, VERR_INVALID_PARAMETER); + + /** @todo r=bird: There is no reason why gidGroup should have write access? + * Seriously, what kind of non-sense is this? */ + + RTFMODE fMode = RTFS_UNIX_IRWXU | RTFS_UNIX_IRWXG; /* Owner (=root) and the group (=vboxsf) have full access. */ + int rc = RTDirCreateFullPath(pszMountPoint, fMode); + if (RT_SUCCESS(rc)) + { + rc = RTPathSetOwnerEx(pszMountPoint, NIL_RTUID /* Owner, unchanged */, gidGroup, RTPATH_F_ON_LINK); + if (RT_SUCCESS(rc)) + { + rc = RTPathSetMode(pszMountPoint, fMode); + if (RT_FAILURE(rc)) + { + if (rc == VERR_WRITE_PROTECT) + { + VGSvcVerbose(3, "vbsvcAutoMountPrepareMountPointOld: Mount directory '%s' already is used/mounted\n", + pszMountPoint); + rc = VINF_SUCCESS; + } + else + VGSvcError("vbsvcAutoMountPrepareMountPointOld: Could not set mode %RTfmode for mount directory '%s', rc = %Rrc\n", + fMode, pszMountPoint, rc); + } + } + else + VGSvcError("vbsvcAutoMountPrepareMountPointOld: Could not set permissions for mount directory '%s', rc = %Rrc\n", + pszMountPoint, rc); + } + else + VGSvcError("vbsvcAutoMountPrepareMountPointOld: Could not create mount directory '%s' with mode %RTfmode, rc = %Rrc\n", + pszMountPoint, fMode, rc); + return rc; +} + + +/** + * Mounts a shared folder. + * + * @returns VBox status code reflecting unmount and mount point preparation + * results, but not actual mounting + * + * @param pszShareName The shared folder name. + * @param pszMountPoint The mount point. + */ +static int vbsvcAutoMountSharedFolderOld(const char *pszShareName, const char *pszMountPoint) +{ + /* + * Linux and solaris share the same mount structure. + */ + struct group *grp_vboxsf = getgrnam("vboxsf"); + if (!grp_vboxsf) + { + VGSvcError("vbsvcAutoMountWorker: Group 'vboxsf' does not exist\n"); + return VINF_SUCCESS; + } + + int rc = vbsvcAutoMountPrepareMountPointOld(pszMountPoint, pszShareName, grp_vboxsf->gr_gid); + if (RT_SUCCESS(rc)) + { +# ifdef RT_OS_SOLARIS + int const fFlags = MS_OPTIONSTR; + char szOptBuf[MAX_MNTOPT_STR] = { '\0', }; + RTStrPrintf(szOptBuf, sizeof(szOptBuf), "uid=0,gid=%d,dmode=0770,fmode=0770,dmask=0000,fmask=0000", grp_vboxsf->gr_gid); + int r = mount(pszShareName, + pszMountPoint, + fFlags, + "vboxfs", + NULL, /* char *dataptr */ + 0, /* int datalen */ + szOptBuf, + sizeof(szOptBuf)); + if (r == 0) + VGSvcVerbose(0, "vbsvcAutoMountWorker: Shared folder '%s' was mounted to '%s'\n", pszShareName, pszMountPoint); + else if (errno != EBUSY) /* Share is already mounted? Then skip error msg. */ + VGSvcError("vbsvcAutoMountWorker: Could not mount shared folder '%s' to '%s', error = %s\n", + pszShareName, pszMountPoint, strerror(errno)); + +# else /* RT_OS_LINUX */ + struct utsname uts; + AssertStmt(uname(&uts) != -1, strcpy(uts.release, "4.4.0")); + + unsigned long const fFlags = MS_NODEV; + char szOpts[MAX_MNTOPT_STR] = { '\0' }; + ssize_t cchOpts = RTStrPrintf2(szOpts, sizeof(szOpts), "uid=0,gid=%d,dmode=0770,fmode=0770,dmask=0000,fmask=0000", + grp_vboxsf->gr_gid); + if (cchOpts > 0 && RTStrVersionCompare(uts.release, "2.6.0") < 0) + cchOpts = RTStrPrintf2(&szOpts[cchOpts], sizeof(szOpts) - cchOpts, ",sf_name=%s", pszShareName); + if (cchOpts <= 0) + { + VGSvcError("vbsvcAutomounterMountIt: szOpts overflow! %zd (share %s)\n", cchOpts, pszShareName); + return VERR_BUFFER_OVERFLOW; + } + + int r = mount(pszShareName, + pszMountPoint, + "vboxsf", + fFlags, + szOpts); + if (r == 0) + { + VGSvcVerbose(0, "vbsvcAutoMountWorker: Shared folder '%s' was mounted to '%s'\n", pszShareName, pszMountPoint); + + r = vbsfmount_complete(pszShareName, pszMountPoint, fFlags, szOpts); + switch (r) + { + case 0: /* Success. */ + errno = 0; /* Clear all errors/warnings. */ + break; + case 1: + VGSvcError("vbsvcAutoMountWorker: Could not update mount table (malloc failure)\n"); + break; + case 2: + VGSvcError("vbsvcAutoMountWorker: Could not open mount table for update: %s\n", strerror(errno)); + break; + case 3: + /* VGSvcError("vbsvcAutoMountWorker: Could not add an entry to the mount table: %s\n", strerror(errno)); */ + errno = 0; + break; + default: + VGSvcError("vbsvcAutoMountWorker: Unknown error while completing mount operation: %d\n", r); + break; + } + } + else /* r == -1, we got some error in errno. */ + { + switch (errno) + { + /* If we get EINVAL here, the system already has mounted the Shared Folder to another + * mount point. */ + case EINVAL: + VGSvcVerbose(0, "vbsvcAutoMountWorker: Shared folder '%s' is already mounted!\n", pszShareName); + /* Ignore this error! */ + break; + case EBUSY: + /* Ignore these errors! */ + break; + default: + VGSvcError("vbsvcAutoMountWorker: Could not mount shared folder '%s' to '%s': %s (%d)\n", + pszShareName, pszMountPoint, strerror(errno), errno); + rc = RTErrConvertFromErrno(errno); + break; + } + } +# endif + } + VGSvcVerbose(3, "vbsvcAutoMountWorker: Mounting returned with rc=%Rrc\n", rc); + return rc; +} + + +/** + * Processes shared folder mappings retrieved from the host. + * + * @returns VBox status code. + * @param paMappings The mappings. + * @param cMappings The number of mappings. + * @param pszMountDir The mount directory. + * @param pszSharePrefix The share prefix. + * @param uClientID The shared folder service (HGCM) client ID. + */ +static int vbsvcAutoMountProcessMappingsOld(PCVBGLR3SHAREDFOLDERMAPPING paMappings, uint32_t cMappings, + const char *pszMountDir, const char *pszSharePrefix, uint32_t uClientID) +{ + if (cMappings == 0) + return VINF_SUCCESS; + AssertPtrReturn(paMappings, VERR_INVALID_PARAMETER); + AssertPtrReturn(pszMountDir, VERR_INVALID_PARAMETER); + AssertPtrReturn(pszSharePrefix, VERR_INVALID_PARAMETER); + AssertReturn(uClientID > 0, VERR_INVALID_PARAMETER); + + /** @todo r=bird: Why is this loop schitzoid about status codes? It quits if + * RTPathJoin fails (i.e. if the user specifies a very long name), but happily + * continues if RTStrAPrintf failes (mem alloc). + * + * It also happily continues if the 'vboxsf' group is missing, which is a waste + * of effort... In fact, retrieving the group ID could probably be done up + * front, outside the loop. */ + int rc = VINF_SUCCESS; + for (uint32_t i = 0; i < cMappings && RT_SUCCESS(rc); i++) + { + char *pszShareName = NULL; + rc = VbglR3SharedFolderGetName(uClientID, paMappings[i].u32Root, &pszShareName); + if ( RT_SUCCESS(rc) + && *pszShareName) + { + VGSvcVerbose(3, "vbsvcAutoMountWorker: Connecting share %u (%s) ...\n", i+1, pszShareName); + + /** @todo r=bird: why do you copy things twice here and waste heap space? + * szMountPoint has a fixed size. + * @code + * char szMountPoint[RTPATH_MAX]; + * rc = RTPathJoin(szMountPoint, sizeof(szMountPoint), pszMountDir, *pszSharePrefix ? pszSharePrefix : pszShareName); + * if (RT_SUCCESS(rc) && *pszSharePrefix) + * rc = RTStrCat(szMountPoint, sizeof(szMountPoint), pszShareName); + * @endcode */ + char *pszShareNameFull = NULL; + if (RTStrAPrintf(&pszShareNameFull, "%s%s", pszSharePrefix, pszShareName) > 0) + { + char szMountPoint[RTPATH_MAX]; + rc = RTPathJoin(szMountPoint, sizeof(szMountPoint), pszMountDir, pszShareNameFull); + if (RT_SUCCESS(rc)) + { + VGSvcVerbose(4, "vbsvcAutoMountWorker: Processing mount point '%s'\n", szMountPoint); + + /* + * Already mounted? + */ + /** @todo r-bird: this does not take into account that a shared folder could + * be mounted twice... We're really just interested in whether the + * folder is mounted on 'szMountPoint', no where else... */ + bool fSkip = false; + char szAlreadyMountedOn[RTPATH_MAX]; + if (vbsvcAutoMountShareIsMountedOld(pszShareName, szAlreadyMountedOn, sizeof(szAlreadyMountedOn))) + { + /* Do if it not mounted to our desired mount point */ + if (RTStrICmp(szMountPoint, szAlreadyMountedOn)) + { + VGSvcVerbose(3, "vbsvcAutoMountWorker: Shared folder '%s' already mounted on '%s', unmounting ...\n", + pszShareName, szAlreadyMountedOn); + rc = vbsvcAutoMountUnmountOld(szAlreadyMountedOn); + if (RT_SUCCESS(rc)) + fSkip = false; + else + VGSvcError("vbsvcAutoMountWorker: Failed to unmount '%s', %s (%d)! (rc=%Rrc)\n", + szAlreadyMountedOn, strerror(errno), errno, rc); /** @todo errno isn't reliable at this point */ + } + if (fSkip) + VGSvcVerbose(3, "vbsvcAutoMountWorker: Shared folder '%s' already mounted on '%s', skipping\n", + pszShareName, szAlreadyMountedOn); + } + if (!fSkip) + { + /* + * Mount it. + */ + rc = vbsvcAutoMountSharedFolderOld(pszShareName, szMountPoint); + } + } + else + VGSvcError("vbsvcAutoMountWorker: Unable to join mount point/prefix/shrae, rc = %Rrc\n", rc); + RTStrFree(pszShareNameFull); + } + else + VGSvcError("vbsvcAutoMountWorker: Unable to allocate full share name\n"); + RTStrFree(pszShareName); + } + else + VGSvcError("vbsvcAutoMountWorker: Error while getting the shared folder name for root node = %u, rc = %Rrc\n", + paMappings[i].u32Root, rc); + } /* for cMappings. */ + return rc; +} + +#endif /* defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX) - the old code*/ + + +/** + * Service worker function for old host. + * + * This only mount stuff on startup. + * + * @returns VBox status code. + * @param pfShutdown Shutdown indicator. + */ +static int vbsvcAutoMountWorkerOld(bool volatile *pfShutdown) +{ +#if defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX) + /* + * We only do a single pass here. + */ + uint32_t cMappings; + PVBGLR3SHAREDFOLDERMAPPING paMappings; + int rc = VbglR3SharedFolderGetMappings(g_idClientSharedFolders, true /* Only process auto-mounted folders */, + &paMappings, &cMappings); + if ( RT_SUCCESS(rc) + && cMappings) + { + char *pszMountDir; + rc = VbglR3SharedFolderGetMountDir(&pszMountDir); + if (rc == VERR_NOT_FOUND) + rc = RTStrDupEx(&pszMountDir, VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR); + if (RT_SUCCESS(rc)) + { + VGSvcVerbose(3, "vbsvcAutoMountWorker: Shared folder mount dir set to '%s'\n", pszMountDir); + + char *pszSharePrefix; + rc = VbglR3SharedFolderGetMountPrefix(&pszSharePrefix); + if (RT_SUCCESS(rc)) + { + VGSvcVerbose(3, "vbsvcAutoMountWorker: Shared folder mount prefix set to '%s'\n", pszSharePrefix); +# ifdef USE_VIRTUAL_SHARES + /* Check for a fixed/virtual auto-mount share. */ + if (VbglR3SharedFolderExists(g_idClientSharedFolders, "vbsfAutoMount")) + VGSvcVerbose(3, "vbsvcAutoMountWorker: Host supports auto-mount root\n"); + else + { +# endif + VGSvcVerbose(3, "vbsvcAutoMountWorker: Got %u shared folder mappings\n", cMappings); + rc = vbsvcAutoMountProcessMappingsOld(paMappings, cMappings, pszMountDir, pszSharePrefix, + g_idClientSharedFolders); +# ifdef USE_VIRTUAL_SHARES + } +# endif + RTStrFree(pszSharePrefix); + } /* Mount share prefix. */ + else + VGSvcError("vbsvcAutoMountWorker: Error while getting the shared folder mount prefix, rc = %Rrc\n", rc); + RTStrFree(pszMountDir); + } + else + VGSvcError("vbsvcAutoMountWorker: Error while getting the shared folder directory, rc = %Rrc\n", rc); + VbglR3SharedFolderFreeMappings(paMappings); + } + else if (RT_FAILURE(rc)) + VGSvcError("vbsvcAutoMountWorker: Error while getting the shared folder mappings, rc = %Rrc\n", rc); + else + VGSvcVerbose(3, "vbsvcAutoMountWorker: No shared folder mappings found\n"); + +#else + int rc = VINF_SUCCESS; +#endif /* defined(RT_OS_SOLARIS) || defined(RT_OS_LINUX) */ + + + /* + * Wait on shutdown (this used to be a silly RTThreadSleep(500) loop). + */ + while (!*pfShutdown) + { + rc = RTSemEventMultiWait(g_hAutoMountEvent, RT_MS_1MIN); + if (rc != VERR_TIMEOUT) + break; + } + + VGSvcVerbose(3, "vbsvcAutoMountWorkerOld: Finished with rc=%Rrc\n", rc); + return rc; +} + +#if !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2) +/** + * Assembles the mount directory and prefix into @a pszDst. + * + * Will fall back on defaults if we have trouble with the configuration from the + * host. This ASSUMES that @a cbDst is rather large and won't cause trouble + * with the default. + * + * @returns IPRT status code. + * @param pszDst Where to return the prefix. + * @param cbDst The size of the prefix buffer. + */ +static int vbsvcAutomounterQueryMountDirAndPrefix(char *pszDst, size_t cbDst) +{ + /* + * Query the config first. + */ + /* Mount directory: */ + const char *pszDir = VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR; + char *pszCfgDir; + int rc = VbglR3SharedFolderGetMountDir(&pszCfgDir); + if (RT_SUCCESS(rc)) + { + if (*pszCfgDir == '/') + pszDir = pszCfgDir; + } + else + pszCfgDir = NULL; + + /* Prefix: */ + const char *pszPrefix = VBOXSERVICE_AUTOMOUNT_DEFAULT_PREFIX; + char *pszCfgPrefix; + rc = VbglR3SharedFolderGetMountPrefix(&pszCfgPrefix); + if (RT_SUCCESS(rc)) + { + if ( strchr(pszCfgPrefix, '/') == NULL + && strchr(pszCfgPrefix, '\\') == NULL + && strcmp(pszCfgPrefix, "..") != 0) + pszPrefix = pszCfgPrefix; + } + else + pszCfgPrefix = NULL; + + /* + * Try combine the two. + */ + rc = RTPathAbs(pszDir, pszDst, cbDst); + if (RT_SUCCESS(rc)) + { + if (*pszPrefix) + { + rc = RTPathAppend(pszDst, cbDst, pszPrefix); + if (RT_FAILURE(rc)) + VGSvcError("vbsvcAutomounterQueryMountDirAndPrefix: RTPathAppend(%s,,%s) -> %Rrc\n", pszDst, pszPrefix, rc); + } + else + { + rc = RTPathEnsureTrailingSeparator(pszDst, cbDst); + if (RT_FAILURE(rc)) + VGSvcError("vbsvcAutomounterQueryMountDirAndPrefix: RTPathEnsureTrailingSeparator(%s) -> %Rrc\n", pszDst, rc); + } + } + else + VGSvcError("vbsvcAutomounterQueryMountDirAndPrefix: RTPathAbs(%s) -> %Rrc\n", pszDir, rc); + + + /* + * Return the default dir + prefix if the above failed. + */ + if (RT_FAILURE(rc)) + { + rc = RTStrCopy(pszDst, cbDst, VBOXSERVICE_AUTOMOUNT_DEFAULT_DIR "/" VBOXSERVICE_AUTOMOUNT_DEFAULT_PREFIX); + AssertRC(rc); + } + + RTStrFree(pszCfgDir); + RTStrFree(pszCfgPrefix); + return rc; +} +#endif /* !RT_OS_WINDOW && !RT_OS_OS2 */ + + +/** + * @callback_method_impl{FNRTSORTCMP, For sorting mount table by root ID. } + */ +static DECLCALLBACK(int) vbsvcAutomounterCompareEntry(void const *pvElement1, void const *pvElement2, void *pvUser) +{ + RT_NOREF_PV(pvUser); + PVBSVCAUTOMOUNTERENTRY pEntry1 = (PVBSVCAUTOMOUNTERENTRY)pvElement1; + PVBSVCAUTOMOUNTERENTRY pEntry2 = (PVBSVCAUTOMOUNTERENTRY)pvElement2; + return pEntry1->idRoot < pEntry2->idRoot ? -1 + : pEntry1->idRoot > pEntry2->idRoot ? 1 : 0; +} + + +/** + * Worker for vbsvcAutomounterPopulateTable for adding discovered entries. + * + * This is puts dummies in for missing values, depending on + * vbsvcAutomounterPopulateTable to query them later. + * + * @returns VINF_SUCCESS or VERR_NO_MEMORY; + * @param pMountTable The mount table to add an entry to. + * @param pszName The shared folder name. + * @param pszMountPoint The mount point. + */ +static int vbsvcAutomounterAddEntry(PVBSVCAUTOMOUNTERTABLE pMountTable, const char *pszName, const char *pszMountPoint) +{ + VGSvcVerbose(2, "vbsvcAutomounterAddEntry: %s -> %s\n", pszMountPoint, pszName); + PVBSVCAUTOMOUNTERENTRY pEntry = (PVBSVCAUTOMOUNTERENTRY)RTMemAlloc(sizeof(*pEntry)); + pEntry->idRoot = UINT32_MAX; + pEntry->uRootIdVersion = UINT32_MAX; + pEntry->fFlags = UINT64_MAX; + pEntry->pszName = RTStrDup(pszName); + pEntry->pszMountPoint = NULL; + pEntry->pszActualMountPoint = RTStrDup(pszMountPoint); + if (pEntry->pszName && pEntry->pszActualMountPoint) + { + if (pMountTable->cEntries + 1 <= pMountTable->cAllocated) + { + pMountTable->papEntries[pMountTable->cEntries++] = pEntry; + return VINF_SUCCESS; + } + + void *pvNew = RTMemRealloc(pMountTable->papEntries, (pMountTable->cAllocated + 8) * sizeof(pMountTable->papEntries[0])); + if (pvNew) + { + pMountTable->cAllocated += 8; + pMountTable->papEntries = (PVBSVCAUTOMOUNTERENTRY *)pvNew; + + pMountTable->papEntries[pMountTable->cEntries++] = pEntry; + return VINF_SUCCESS; + } + } + RTMemFree(pEntry->pszActualMountPoint); + RTMemFree(pEntry->pszName); + RTMemFree(pEntry); + return VERR_NO_MEMORY; +} + + +/** + * Populates the mount table as best we can with existing automount entries. + * + * @returns VINF_SUCCESS or VERR_NO_MEMORY; + * @param pMountTable The mount table (empty). + */ +static int vbsvcAutomounterPopulateTable(PVBSVCAUTOMOUNTERTABLE pMountTable) +{ + int rc; + +#ifdef RT_OS_WINDOWS + /* + * Loop thru the drive letters and check out each of them using QueryDosDeviceW. + */ + static const char s_szDevicePath[] = "\\Device\\VBoxMiniRdr\\;"; + for (char chDrive = 'Z'; chDrive >= 'A'; chDrive--) + { + RTUTF16 const wszMountPoint[4] = { (RTUTF16)chDrive, ':', '\0', '\0' }; + RTUTF16 wszTargetPath[RTPATH_MAX]; + DWORD const cwcResult = QueryDosDeviceW(wszMountPoint, wszTargetPath, RT_ELEMENTS(wszTargetPath)); + if ( cwcResult > sizeof(s_szDevicePath) + && RTUtf16NICmpAscii(wszTargetPath, RT_STR_TUPLE(s_szDevicePath)) == 0) + { + PCRTUTF16 pwsz = &wszTargetPath[RT_ELEMENTS(s_szDevicePath) - 1]; + Assert(pwsz[-1] == ';'); + if ( (pwsz[0] & ~(RTUTF16)0x20) == chDrive + && pwsz[1] == ':' + && pwsz[2] == '\\') + { + /* For now we'll just use the special capitalization of the + "server" name to identify it as our work. We could check + if the symlink is from \Global?? or \??, but that trick does + work for older OS versions (<= XP) or when running the + service manually for testing/wathever purposes. */ + /** @todo Modify the windows shared folder driver to allow tagging drives.*/ + if (RTUtf16NCmpAscii(&pwsz[3], RT_STR_TUPLE("VBoxSvr\\")) == 0) + { + pwsz += 3 + 8; + if (*pwsz != '\\' && *pwsz) + { + /* The shared folder name should follow immediately after the server prefix. */ + char *pszMountedName = NULL; + rc = RTUtf16ToUtf8(pwsz, &pszMountedName); + if (RT_SUCCESS(rc)) + { + char const szMountPoint[4] = { chDrive, ':', '\0', '\0' }; + rc = vbsvcAutomounterAddEntry(pMountTable, pszMountedName, szMountPoint); + RTStrFree(pszMountedName); + } + if (RT_FAILURE(rc)) + return rc; + } + else + VGSvcVerbose(2, "vbsvcAutomounterPopulateTable: Malformed, not ours: %ls -> %ls\n", + wszMountPoint, wszTargetPath); + } + else + VGSvcVerbose(3, "vbsvcAutomounterPopulateTable: Not ours: %ls -> %ls\n", wszMountPoint, wszTargetPath); + } + } + } + +#elif defined(RT_OS_OS2) + /* + * Just loop thru the drive letters and check the attachment of each. + */ + for (char chDrive = 'Z'; chDrive >= 'A'; chDrive--) + { + char const szMountPoint[4] = { chDrive, ':', '\0', '\0' }; + union + { + FSQBUFFER2 FsQueryBuf; + char achPadding[1024]; + } uBuf; + RT_ZERO(uBuf); + ULONG cbBuf = sizeof(uBuf) - 2; + APIRET rcOs2 = DosQueryFSAttach(szMountPoint, 0, FSAIL_QUERYNAME, &uBuf.FsQueryBuf, &cbBuf); + if (rcOs2 == NO_ERROR) + { + const char *pszFsdName = (const char *)&uBuf.FsQueryBuf.szName[uBuf.FsQueryBuf.cbName + 1]; + if ( uBuf.FsQueryBuf.iType == FSAT_REMOTEDRV + && RTStrICmpAscii(pszFsdName, "VBOXSF") == 0) + { + const char *pszMountedName = (const char *)&pszFsdName[uBuf.FsQueryBuf.cbFSDName + 1]; + const char *pszTag = pszMountedName + strlen(pszMountedName) + 1; /* (Safe. Always two trailing zero bytes, see above.) */ + if (strcmp(pszTag, g_szTag) == 0) + { + rc = vbsvcAutomounterAddEntry(pMountTable, pszMountedName, szMountPoint); + if (RT_FAILURE(rc)) + return rc; + } + } + } + } + +#elif defined(RT_OS_LINUX) + /* + * Scan the mount table file for the mount point and then match file system + * and device/share. We identify our mounts by mount path + prefix for now, + * but later we may use the same approach as on solaris. + */ + FILE *pFile = setmntent("/proc/mounts", "r"); + int iErrMounts = errno; + if (!pFile) + pFile = setmntent("/etc/mtab", "r"); + if (pFile) + { + rc = VWRN_NOT_FOUND; + struct mntent *pEntry; + while ((pEntry = getmntent(pFile)) != NULL) + if (strcmp(pEntry->mnt_type, "vboxsf") == 0) + if (strstr(pEntry->mnt_opts, g_szTag) != NULL) + { + rc = vbsvcAutomounterAddEntry(pMountTable, pEntry->mnt_fsname, pEntry->mnt_dir); + if (RT_FAILURE(rc)) + { + endmntent(pFile); + return rc; + } + } + endmntent(pFile); + } + else + VGSvcError("vbsvcAutomounterQueryMountPoint: Could not open mount tab '%s' (errno=%d) or '/proc/mounts' (errno=%d)\n", + _PATH_MOUNTED, errno, iErrMounts); + +#elif defined(RT_OS_SOLARIS) + /* + * Look thru the system mount table and inspect the vboxsf mounts. + */ + FILE *pFile = fopen(_PATH_MOUNTED, "r"); + if (pFile) + { + rc = VINF_SUCCESS; + struct mnttab Entry; + while (getmntent(pFile, &Entry) == 0) + if (strcmp(Entry.mnt_fstype, "vboxfs") == 0) + { + /* Look for the dummy automounter option. */ + if ( Entry.mnt_mntopts != NULL + && strstr(Entry.mnt_mntopts, g_szTag) != NULL) + { + rc = vbsvcAutomounterAddEntry(pMountTable, Entry.mnt_special, Entry.mnt_mountp); + if (RT_FAILURE(rc)) + { + fclose(pFile); + return rc; + } + } + } + fclose(pFile); + } + else + VGSvcError("vbsvcAutomounterQueryMountPoint: Could not open mount tab '%s' (errno=%d)\n", _PATH_MOUNTED, errno); + +#else +# error "PORTME!" +#endif + + /* + * Try reconcile the detected folders with data from the host. + */ + uint32_t cMappings = 0; + PVBGLR3SHAREDFOLDERMAPPING paMappings = NULL; + rc = VbglR3SharedFolderGetMappings(g_idClientSharedFolders, true /*fAutoMountOnly*/, &paMappings, &cMappings); + if (RT_SUCCESS(rc)) + { + for (uint32_t i = 0; i < cMappings && RT_SUCCESS(rc); i++) + { + uint32_t const idRootSrc = paMappings[i].u32Root; + + uint32_t uRootIdVer = UINT32_MAX; + uint64_t fFlags = 0; + char *pszName = NULL; + char *pszMntPt = NULL; + int rc2 = VbglR3SharedFolderQueryFolderInfo(g_idClientSharedFolders, idRootSrc, VBOXSERVICE_AUTOMOUNT_MIQF, + &pszName, &pszMntPt, &fFlags, &uRootIdVer); + if (RT_SUCCESS(rc2)) + { + uint32_t iPrevHit = UINT32_MAX; + for (uint32_t iTable = 0; iTable < pMountTable->cEntries; iTable++) + { + PVBSVCAUTOMOUNTERENTRY pEntry = pMountTable->papEntries[iTable]; + if (RTStrICmp(pEntry->pszName, pszName) == 0) + { + VGSvcVerbose(2, "vbsvcAutomounterPopulateTable: Identified %s -> %s: idRoot=%u ver=%u fFlags=%#x AutoMntPt=%s\n", + pEntry->pszActualMountPoint, pEntry->pszName, idRootSrc, uRootIdVer, fFlags, pszMntPt); + pEntry->fFlags = fFlags; + pEntry->idRoot = idRootSrc; + pEntry->uRootIdVersion = uRootIdVer; + RTStrFree(pEntry->pszMountPoint); + pEntry->pszMountPoint = RTStrDup(pszMntPt); + if (!pEntry->pszMountPoint) + { + rc = VERR_NO_MEMORY; + break; + } + + /* If multiple mappings of the same folder, pick the first or the one + with matching mount point. */ + if (iPrevHit == UINT32_MAX) + iPrevHit = iTable; + else if (RTPathCompare(pszMntPt, pEntry->pszActualMountPoint) == 0) + { + if (iPrevHit != UINT32_MAX) + pMountTable->papEntries[iPrevHit]->uRootIdVersion -= 1; + iPrevHit = iTable; + } + else + pEntry->uRootIdVersion -= 1; + } + } + + RTStrFree(pszName); + RTStrFree(pszMntPt); + } + else + VGSvcError("vbsvcAutomounterPopulateTable: VbglR3SharedFolderQueryFolderInfo(%u) failed: %Rrc\n", idRootSrc, rc2); + } + + VbglR3SharedFolderFreeMappings(paMappings); + + /* + * Sort the table by root ID. + */ + if (pMountTable->cEntries > 1) + RTSortApvShell((void **)pMountTable->papEntries, pMountTable->cEntries, vbsvcAutomounterCompareEntry, NULL); + + for (uint32_t iTable = 0; iTable < pMountTable->cEntries; iTable++) + { + PVBSVCAUTOMOUNTERENTRY pEntry = pMountTable->papEntries[iTable]; + if (pMountTable->papEntries[iTable]->idRoot != UINT32_MAX) + VGSvcVerbose(1, "vbsvcAutomounterPopulateTable: #%u: %s -> %s idRoot=%u ver=%u fFlags=%#x AutoMntPt=%s\n", + iTable, pEntry->pszActualMountPoint, pEntry->pszName, pEntry->idRoot, pEntry->uRootIdVersion, + pEntry->fFlags, pEntry->pszMountPoint); + else + VGSvcVerbose(1, "vbsvcAutomounterPopulateTable: #%u: %s -> %s - not identified!\n", + iTable, pEntry->pszActualMountPoint, pEntry->pszName); + } + } + else + VGSvcError("vbsvcAutomounterPopulateTable: VbglR3SharedFolderGetMappings failed: %Rrc\n", rc); + return rc; +} + + +/** + * Checks whether the shared folder @a pszName is mounted on @a pszMountPoint. + * + * @returns Exactly one of the following IPRT status codes; + * @retval VINF_SUCCESS if mounted + * @retval VWRN_NOT_FOUND if nothing is mounted at @a pszMountPoint. + * @retval VERR_RESOURCE_BUSY if a different shared folder is mounted there. + * @retval VERR_ACCESS_DENIED if a non-shared folder file system is mounted + * there. + * + * @param pszMountPoint The mount point to check. + * @param pszName The name of the shared folder (mapping). + */ +static int vbsvcAutomounterQueryMountPoint(const char *pszMountPoint, const char *pszName) +{ + VGSvcVerbose(4, "vbsvcAutomounterQueryMountPoint: pszMountPoint=%s pszName=%s\n", pszMountPoint, pszName); + +#ifdef RT_OS_WINDOWS + /* + * We could've used RTFsQueryType here but would then have to + * calling RTFsQueryLabel for the share name hint, ending up + * doing the same work twice. We could also use QueryDosDeviceW, + * but output is less clear... + */ + PRTUTF16 pwszMountPoint = NULL; + int rc = RTStrToUtf16(pszMountPoint, &pwszMountPoint); + if (RT_SUCCESS(rc)) + { + DWORD uSerial = 0; + DWORD cchCompMax = 0; + DWORD fFlags = 0; + RTUTF16 wszLabel[512]; + RTUTF16 wszFileSystem[256]; + RT_ZERO(wszLabel); + RT_ZERO(wszFileSystem); + if (GetVolumeInformationW(pwszMountPoint, wszLabel, RT_ELEMENTS(wszLabel) - 1, &uSerial, &cchCompMax, &fFlags, + wszFileSystem, RT_ELEMENTS(wszFileSystem) - 1)) + { + if (RTUtf16ICmpAscii(wszFileSystem, "VBoxSharedFolderFS") == 0) + { + char *pszLabel = NULL; + rc = RTUtf16ToUtf8(wszLabel, &pszLabel); + if (RT_SUCCESS(rc)) + { + const char *pszMountedName = pszLabel; + if (RTStrStartsWith(pszMountedName, "VBOX_")) + pszMountedName += sizeof("VBOX_") - 1; + if (RTStrICmp(pszMountedName, pszName) == 0) + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s'.\n", + pszName, pszMountPoint); + rc = VINF_SUCCESS; + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s', not '%s'...\n", + pszMountedName, pszMountPoint, pszName); + rc = VERR_RESOURCE_BUSY; + } + RTStrFree(pszLabel); + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: RTUtf16ToUtf8(%ls,) failed: %Rrc\n", wszLabel, rc); + rc = VERR_RESOURCE_BUSY; + } + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found a '%ls' with label '%ls' mount at '%s', not '%s'...\n", + wszFileSystem, wszLabel, pszMountPoint, pszName); + rc = VERR_ACCESS_DENIED; + } + } + else + { + rc = GetLastError(); + if (rc != ERROR_PATH_NOT_FOUND || g_cVerbosity >= 4) + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: GetVolumeInformationW('%ls',,,,) failed: %u\n", pwszMountPoint, rc); + if (rc == ERROR_PATH_NOT_FOUND) + rc = VWRN_NOT_FOUND; + else if ( RT_C_IS_ALPHA(pszMountPoint[0]) + && pszMountPoint[1] == ':' + && ( pszMountPoint[2] == '\0' + || (RTPATH_IS_SLASH(pszMountPoint[2]) && pszMountPoint[3] == '\0'))) + { + /* See whether QueryDosDeviceW thinks its a malfunctioning shared folder or + something else (it doesn't access the file system). We've seen + VERR_NET_HOST_NOT_FOUND here for shared folders that was removed on the + host side. + + Note! This duplicates code from vbsvcAutomounterPopulateTable. */ + rc = VERR_ACCESS_DENIED; + static const char s_szDevicePath[] = "\\Device\\VBoxMiniRdr\\;"; + wszFileSystem[0] = pwszMountPoint[0]; + wszFileSystem[1] = pwszMountPoint[1]; + wszFileSystem[2] = '\0'; + DWORD const cwcResult = QueryDosDeviceW(wszFileSystem, wszLabel, RT_ELEMENTS(wszLabel)); + if ( cwcResult > sizeof(s_szDevicePath) + && RTUtf16NICmpAscii(wszLabel, RT_STR_TUPLE(s_szDevicePath)) == 0) + { + PCRTUTF16 pwsz = &wszLabel[RT_ELEMENTS(s_szDevicePath) - 1]; + Assert(pwsz[-1] == ';'); + if ( (pwsz[0] & ~(RTUTF16)0x20) == (wszFileSystem[0] & ~(RTUTF16)0x20) + && pwsz[1] == ':' + && pwsz[2] == '\\') + { + if (RTUtf16NICmpAscii(&pwsz[3], RT_STR_TUPLE("VBoxSvr\\")) == 0) + { + pwsz += 3 + 8; + char *pszMountedName = NULL; + rc = RTUtf16ToUtf8(pwsz, &pszMountedName); + if (RT_SUCCESS(rc)) + { + if (RTStrICmp(pszMountedName, pszName) == 0) + { + rc = VINF_SUCCESS; + VGSvcVerbose(2, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s' (using QueryDosDeviceW).\n", + pszName, pszMountPoint); + } + else + { + VGSvcVerbose(2, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s' (using QueryDosDeviceW), not '%s'...\n", + pszMountedName, pszMountPoint, pszName); + rc = VERR_RESOURCE_BUSY; + } + RTStrFree(pszMountedName); + } + else + { + VGSvcVerbose(2, "vbsvcAutomounterQueryMountPoint: RTUtf16ToUtf8 failed: %Rrc\n", rc); + AssertRC(rc); + rc = VERR_RESOURCE_BUSY; + } + } + } + } + } + else + rc = VERR_ACCESS_DENIED; + } + RTUtf16Free(pwszMountPoint); + } + else + { + VGSvcError("vbsvcAutomounterQueryMountPoint: RTStrToUtf16(%s,) -> %Rrc\n", pszMountPoint, rc); + rc = VWRN_NOT_FOUND; + } + return rc; + +#elif defined(RT_OS_OS2) + /* + * Query file system attachment info for the given drive letter. + */ + union + { + FSQBUFFER2 FsQueryBuf; + char achPadding[512]; + } uBuf; + RT_ZERO(uBuf); + + ULONG cbBuf = sizeof(uBuf); + APIRET rcOs2 = DosQueryFSAttach(pszMountPoint, 0, FSAIL_QUERYNAME, &uBuf.FsQueryBuf, &cbBuf); + int rc; + if (rcOs2 == NO_ERROR) + { + const char *pszFsdName = (const char *)&uBuf.FsQueryBuf.szName[uBuf.FsQueryBuf.cbName + 1]; + if ( uBuf.FsQueryBuf.iType == FSAT_REMOTEDRV + && RTStrICmpAscii(pszFsdName, "VBOXSF") == 0) + { + const char *pszMountedName = (const char *)&pszFsdName[uBuf.FsQueryBuf.cbFSDName + 1]; + if (RTStrICmp(pszMountedName, pszName) == 0) + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s'.\n", + pszName, pszMountPoint); + rc = VINF_SUCCESS; + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s', not '%s'...\n", + pszMountedName, pszMountPoint, pszName); + rc = VERR_RESOURCE_BUSY; + } + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found a '%s' type %u mount at '%s', not '%s'...\n", + pszFsdName, uBuf.FsQueryBuf.iType, pszMountPoint, pszName); + rc = VERR_ACCESS_DENIED; + } + } + else + { + rc = VWRN_NOT_FOUND; + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: DosQueryFSAttach(%s) -> %u\n", pszMountPoint, rcOs2); + AssertMsgStmt(rcOs2 != ERROR_BUFFER_OVERFLOW && rcOs2 != ERROR_INVALID_PARAMETER, + ("%s -> %u\n", pszMountPoint, rcOs2), rc = VERR_ACCESS_DENIED); + } + return rc; + +#elif defined(RT_OS_LINUX) + /* + * Scan one of the mount table file for the mount point and then + * match file system and device/share. + */ + FILE *pFile = setmntent("/proc/mounts", "r"); + int rc = errno; + if (!pFile) + pFile = setmntent(_PATH_MOUNTED, "r"); + if (pFile) + { + rc = VWRN_NOT_FOUND; + struct mntent *pEntry; + while ((pEntry = getmntent(pFile)) != NULL) + if (RTPathCompare(pEntry->mnt_dir, pszMountPoint) == 0) + { + if (strcmp(pEntry->mnt_type, "vboxsf") == 0) + { + if (RTStrICmp(pEntry->mnt_fsname, pszName) == 0) + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s'.\n", + pszName, pszMountPoint); + rc = VINF_SUCCESS; + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s', not '%s'...\n", + pEntry->mnt_fsname, pszMountPoint, pszName); + rc = VERR_RESOURCE_BUSY; + } + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found a '%s' mount of '%s' at '%s', not '%s'...\n", + pEntry->mnt_type, pEntry->mnt_fsname, pszMountPoint, pszName); + rc = VERR_ACCESS_DENIED; + } + /* We continue searching in case of stacked mounts, we want the last one. */ + } + endmntent(pFile); + } + else + { + VGSvcError("vbsvcAutomounterQueryMountPoint: Could not open mount tab '/proc/mounts' (errno=%d) or '%s' (errno=%d)\n", + rc, _PATH_MOUNTED, errno); + rc = VERR_ACCESS_DENIED; + } + return rc; + +#elif defined(RT_OS_SOLARIS) + /* + * Similar to linux. + */ + int rc; + FILE *pFile = fopen(_PATH_MOUNTED, "r"); + if (pFile) + { + rc = VWRN_NOT_FOUND; + struct mnttab Entry; + while (getmntent(pFile, &Entry) == 0) + if (RTPathCompare(Entry.mnt_mountp, pszMountPoint) == 0) + { + if (strcmp(Entry.mnt_fstype, "vboxfs") == 0) + { + if (RTStrICmp(Entry.mnt_special, pszName) == 0) + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s'.\n", + pszName, pszMountPoint); + rc = VINF_SUCCESS; + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found shared folder '%s' at '%s', not '%s'...\n", + Entry.mnt_special, pszMountPoint, pszName); + rc = VERR_RESOURCE_BUSY; + } + } + else + { + VGSvcVerbose(3, "vbsvcAutomounterQueryMountPoint: Found a '%s' mount of '%s' at '%s', not '%s'...\n", + Entry.mnt_fstype, Entry.mnt_special, pszMountPoint, pszName); + rc = VERR_ACCESS_DENIED; + } + /* We continue searching in case of stacked mounts, we want the last one. */ + } + fclose(pFile); + } + else + { + VGSvcError("vbsvcAutomounterQueryMountPoint: Could not open mount tab '%s' (errno=%d)\n", _PATH_MOUNTED, errno); + rc = VERR_ACCESS_DENIED; + } + return rc; +#else +# error "PORTME" +#endif +} + + +/** + * Worker for vbsvcAutomounterMountNewEntry that does the OS mounting. + * + * @returns IPRT status code. + * @param pEntry The entry to try mount. + */ +static int vbsvcAutomounterMountIt(PVBSVCAUTOMOUNTERENTRY pEntry) +{ + VGSvcVerbose(3, "vbsvcAutomounterMountIt: Trying to mount '%s' (idRoot=%#x) on '%s'...\n", + pEntry->pszName, pEntry->idRoot, pEntry->pszActualMountPoint); +#ifdef RT_OS_WINDOWS + /* + * Attach the shared folder using WNetAddConnection2W. + * + * According to google we should get a drive symlink in \\GLOBAL?? when + * we are running under the system account. Otherwise it will be a session + * local link (\\??). + */ + Assert(RT_C_IS_UPPER(pEntry->pszActualMountPoint[0]) && pEntry->pszActualMountPoint[1] == ':' && pEntry->pszActualMountPoint[2] == '\0'); + RTUTF16 wszDrive[4] = { (RTUTF16)pEntry->pszActualMountPoint[0], ':', '\0', '\0' }; + + RTUTF16 wszPrefixedName[RTPATH_MAX]; + int rc = RTUtf16CopyAscii(wszPrefixedName, RT_ELEMENTS(wszPrefixedName), "\\\\VBoxSvr\\"); + AssertRC(rc); + + size_t const offName = RTUtf16Len(wszPrefixedName); + PRTUTF16 pwszName = &wszPrefixedName[offName]; + rc = RTStrToUtf16Ex(pEntry->pszName, RTSTR_MAX, &pwszName, sizeof(wszPrefixedName) - offName, NULL); + if (RT_FAILURE(rc)) + { + VGSvcError("vbsvcAutomounterMountIt: RTStrToUtf16Ex failed on '%s': %Rrc\n", pEntry->pszName, rc); + return rc; + } + + VGSvcVerbose(3, "vbsvcAutomounterMountIt: wszDrive='%ls', wszPrefixedName='%ls'\n", + wszDrive, wszPrefixedName); + + NETRESOURCEW NetRsrc; + RT_ZERO(NetRsrc); + NetRsrc.dwType = RESOURCETYPE_DISK; + NetRsrc.lpLocalName = wszDrive; + NetRsrc.lpRemoteName = wszPrefixedName; + NetRsrc.lpProvider = L"VirtualBox Shared Folders"; /* Only try our provider. */ + NetRsrc.lpComment = pwszName; + + DWORD dwErr = WNetAddConnection2W(&NetRsrc, NULL /*pwszPassword*/, NULL /*pwszUserName*/, 0 /*dwFlags*/); + if (dwErr == NO_ERROR) + { + VGSvcVerbose(0, "vbsvcAutomounterMountIt: Successfully mounted '%s' on '%s'\n", + pEntry->pszName, pEntry->pszActualMountPoint); + return VINF_SUCCESS; + } + VGSvcError("vbsvcAutomounterMountIt: Failed to attach '%s' to '%s': %Rrc (%u)\n", + pEntry->pszName, pEntry->pszActualMountPoint, RTErrConvertFromWin32(dwErr), dwErr); + return VERR_OPEN_FAILED; + +#elif defined(RT_OS_OS2) + /* + * It's a rather simple affair on OS/2. + * + * In order to be able to detect our mounts we add a 2nd string after + * the folder name that tags the attachment. The IFS will remember this + * and return it when DosQueryFSAttach is called. + * + * Note! Kernel currently accepts limited 7-bit ASCII names. We could + * change that to UTF-8 if we like as that means no extra string + * encoding conversion fun here. + */ + char szzNameAndTag[256]; + size_t cchName = strlen(pEntry->pszName); + if (cchName + 1 + sizeof(g_szTag) <= sizeof(szzNameAndTag)) + { + memcpy(szzNameAndTag, pEntry->pszName, cchName); + szzNameAndTag[cchName] = '\0'; + memcpy(&szzNameAndTag[cchName + 1], g_szTag, sizeof(g_szTag)); + + APIRET rc = DosFSAttach(pEntry->pszActualMountPoint, "VBOXSF", szzNameAndTag, cchName + 1 + sizeof(g_szTag), FS_ATTACH); + if (rc == NO_ERROR) + { + VGSvcVerbose(0, "vbsvcAutomounterMountIt: Successfully mounted '%s' on '%s'\n", + pEntry->pszName, pEntry->pszActualMountPoint); + return VINF_SUCCESS; + } + VGSvcError("vbsvcAutomounterMountIt: DosFSAttach failed to attach '%s' to '%s': %u\n", + pEntry->pszName, pEntry->pszActualMountPoint, rc); + } + else + VGSvcError("vbsvcAutomounterMountIt: Share name for attach to '%s' is too long: %u chars - '%s'\n", + pEntry->pszActualMountPoint, cchName, pEntry->pszName); + return VERR_OPEN_FAILED; + +#else + /* + * Common work for unix-like systems: Get group, make sure mount directory exist. + */ + int rc = RTDirCreateFullPath(pEntry->pszActualMountPoint, + RTFS_UNIX_IRWXU | RTFS_UNIX_IXGRP | RTFS_UNIX_IRGRP | RTFS_UNIX_IXOTH | RTFS_UNIX_IROTH); + if (RT_FAILURE(rc)) + { + VGSvcError("vbsvcAutomounterMountIt: Failed to create mount path '%s' for share '%s': %Rrc\n", + pEntry->pszActualMountPoint, pEntry->pszName, rc); + return rc; + } + + gid_t gidMount; + struct group *grp_vboxsf = getgrnam("vboxsf"); + if (grp_vboxsf) + gidMount = grp_vboxsf->gr_gid; + else + { + VGSvcError("vbsvcAutomounterMountIt: Group 'vboxsf' does not exist\n"); + gidMount = 0; + } + +# if defined(RT_OS_LINUX) + /* + * Linux a bit more work... + */ + struct utsname uts; + AssertStmt(uname(&uts) != -1, strcpy(uts.release, "4.4.0")); + + /* Built mount option string. Need st_name for pre 2.6.0 kernels. */ + unsigned long const fFlags = MS_NODEV; + char szOpts[MAX_MNTOPT_STR] = { '\0' }; + ssize_t cchOpts = RTStrPrintf2(szOpts, sizeof(szOpts), + "uid=0,gid=%d,dmode=0770,fmode=0770,dmask=0000,fmask=0000,tag=%s", gidMount, g_szTag); + if (RTStrVersionCompare(uts.release, "2.6.0") < 0 && cchOpts > 0) + cchOpts += RTStrPrintf2(&szOpts[cchOpts], sizeof(szOpts) - cchOpts, ",sf_name=%s", pEntry->pszName); + if (cchOpts <= 0) + { + VGSvcError("vbsvcAutomounterMountIt: szOpts overflow! %zd\n", cchOpts); + return VERR_BUFFER_OVERFLOW; + } + + /* Do the mounting. The fallback w/o tag is for the Linux vboxsf fork + which lagged a lot behind when it first appeared in 5.6. */ + errno = 0; + rc = mount(pEntry->pszName, pEntry->pszActualMountPoint, "vboxsf", fFlags, szOpts); + if (rc != 0 && errno == EINVAL && RTStrVersionCompare(uts.release, "5.6.0") >= 0) + { + VGSvcVerbose(2, "vbsvcAutomounterMountIt: mount returned EINVAL, retrying without the tag.\n"); + *strstr(szOpts, ",tag=") = '\0'; + errno = 0; + rc = mount(pEntry->pszName, pEntry->pszActualMountPoint, "vboxsf", fFlags, szOpts); + if (rc == 0) + VGSvcVerbose(0, "vbsvcAutomounterMountIt: Running outdated vboxsf module without support for the 'tag' option?\n"); + } + if (rc == 0) + { + VGSvcVerbose(0, "vbsvcAutomounterMountIt: Successfully mounted '%s' on '%s'\n", + pEntry->pszName, pEntry->pszActualMountPoint); + + errno = 0; + rc = vbsfmount_complete(pEntry->pszName, pEntry->pszActualMountPoint, fFlags, szOpts); + if (rc != 0) /* Ignorable. /etc/mtab is probably a link to /proc/mounts. */ + VGSvcVerbose(1, "vbsvcAutomounterMountIt: vbsfmount_complete failed: %s (%d/%d)\n", + rc == 1 ? "malloc" : rc == 2 ? "setmntent" : rc == 3 ? "addmntent" : "unknown", rc, errno); + return VINF_SUCCESS; + } + + if (errno == EINVAL) + VGSvcError("vbsvcAutomounterMountIt: Failed to mount '%s' on '%s' because it is probably mounted elsewhere arleady! (%d,%d)\n", + pEntry->pszName, pEntry->pszActualMountPoint, rc, errno); + else + VGSvcError("vbsvcAutomounterMountIt: Failed to mount '%s' on '%s': %s (%d,%d)\n", + pEntry->pszName, pEntry->pszActualMountPoint, strerror(errno), rc, errno); + return VERR_WRITE_ERROR; + +# elif defined(RT_OS_SOLARIS) + /* + * Solaris is rather simple compared to linux. + * + * The ',VBoxService=auto' option (g_szTag) is ignored by the kernel but helps + * us identify our own mounts on restart. See vbsvcAutomounterPopulateTable(). + * + * Note! Must pass MAX_MNTOPT_STR rather than cchOpts to mount, as it may fail + * with EOVERFLOW in vfs_buildoptionstr() during domount() otherwise. + */ + char szOpts[MAX_MNTOPT_STR] = { '\0', }; + ssize_t cchOpts = RTStrPrintf2(szOpts, sizeof(szOpts), + "uid=0,gid=%d,dmode=0770,fmode=0770,dmask=0000,fmask=0000,tag=%s", gidMount, g_szTag); + if (cchOpts <= 0) + { + VGSvcError("vbsvcAutomounterMountIt: szOpts overflow! %zd\n", cchOpts); + return VERR_BUFFER_OVERFLOW; + } + + rc = mount(pEntry->pszName, pEntry->pszActualMountPoint, MS_OPTIONSTR, "vboxfs", + NULL /*dataptr*/, 0 /* datalen */, szOpts, MAX_MNTOPT_STR); + if (rc == 0) + { + VGSvcVerbose(0, "vbsvcAutomounterMountIt: Successfully mounted '%s' on '%s'\n", + pEntry->pszName, pEntry->pszActualMountPoint); + return VINF_SUCCESS; + } + + rc = errno; + VGSvcError("vbsvcAutomounterMountIt: mount failed for '%s' on '%s' (szOpts=%s): %s (%d)\n", + pEntry->pszName, pEntry->pszActualMountPoint, szOpts, strerror(rc), rc); + return VERR_OPEN_FAILED; + +# else +# error "PORTME!" +# endif +#endif +} + + +/** + * Attempts to mount the given shared folder, adding it to the mount table on + * success. + * + * @returns iTable + 1 on success, iTable on failure. + * @param pTable The mount table. + * @param iTable The mount table index at which to add the mount. + * @param pszName The name of the shared folder mapping. + * @param pszMntPt The mount point (hint) specified by the host. + * @param fFlags The shared folder flags, SHFL_MIF_XXX. + * @param idRoot The root ID. + * @param uRootIdVersion The root ID version. + * @param fAutoMntPt Whether to try automatically assign a mount point if + * pszMntPt doesn't work out. This is set in pass \#3. + */ +static uint32_t vbsvcAutomounterMountNewEntry(PVBSVCAUTOMOUNTERTABLE pTable, uint32_t iTable, + const char *pszName, const char *pszMntPt, uint64_t fFlags, + uint32_t idRoot, uint32_t uRootIdVersion, bool fAutoMntPt) +{ + VGSvcVerbose(3, "vbsvcAutomounterMountNewEntry: #%u: '%s' at '%s'%s\n", + iTable, pszName, pszMntPt, fAutoMntPt ? " auto-assign" : ""); + + /* + * First we need to figure out the actual mount point. + */ + char szActualMountPoint[RTPATH_MAX]; + +#if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS) + /* + * Drive letter based. We only care about the first two characters + * and ignore the rest (see further down). + */ + char chNextLetter = 'Z'; + if (RT_C_IS_ALPHA(pszMntPt[0]) && pszMntPt[1] == ':') + szActualMountPoint[0] = RT_C_TO_UPPER(pszMntPt[0]); + else if (!fAutoMntPt) + return iTable; + else + szActualMountPoint[0] = chNextLetter--; + szActualMountPoint[1] = ':'; + szActualMountPoint[2] = '\0'; + + int rc; + for (;;) + { + rc = vbsvcAutomounterQueryMountPoint(szActualMountPoint, pszName); + if (rc == VWRN_NOT_FOUND) + break; + + /* next */ + if (chNextLetter == 'A' || !fAutoMntPt) + return iTable; + szActualMountPoint[0] = chNextLetter--; + } + +#else + /* + * Path based #1: Host specified mount point. + */ + + /* Skip DOS drive letter if there is a UNIX mount point path following it: */ + if ( pszMntPt[0] != '/' + && pszMntPt[0] != '\0' + && pszMntPt[1] == ':' + && pszMntPt[2] == '/') + pszMntPt += 2; + + /* Try specified mount point if it starts with a UNIX slash: */ + int rc = VERR_ACCESS_DENIED; + if (*pszMntPt == '/') + { + rc = RTPathAbs(pszMntPt, szActualMountPoint, sizeof(szActualMountPoint)); + if (RT_SUCCESS(rc)) + { + static const char * const s_apszBlacklist[] = + { "/", "/dev", "/bin", "/sbin", "/lib", "/etc", "/var", "/tmp", "/usr", "/usr/bin", "/usr/sbin", "/usr/lib" }; + for (size_t i = 0; i < RT_ELEMENTS(s_apszBlacklist); i++) + if (strcmp(szActualMountPoint, s_apszBlacklist[i]) == 0) + { + rc = VERR_ACCESS_DENIED; + break; + } + if (RT_SUCCESS(rc)) + rc = vbsvcAutomounterQueryMountPoint(szActualMountPoint, pszName); + } + } + if (rc != VWRN_NOT_FOUND) + { + if (!fAutoMntPt) + return iTable; + + /* + * Path based #2: Mount dir + prefix + share. + */ + rc = vbsvcAutomounterQueryMountDirAndPrefix(szActualMountPoint, sizeof(szActualMountPoint)); + if (RT_SUCCESS(rc)) + { + /* Append a sanitized share name: */ + size_t const offShare = strlen(szActualMountPoint); + size_t offDst = offShare; + size_t offSrc = 0; + for (;;) + { + char ch = pszName[offSrc++]; + if (ch == ' ' || ch == '/' || ch == '\\' || ch == ':' || ch == '$') + ch = '_'; + else if (!ch) + break; + else if (ch < 0x20 || ch == 0x7f) + continue; + if (offDst < sizeof(szActualMountPoint) - 1) + szActualMountPoint[offDst++] = ch; + } + szActualMountPoint[offDst] = '\0'; + if (offDst > offShare) + { + rc = vbsvcAutomounterQueryMountPoint(szActualMountPoint, pszName); + if (rc != VWRN_NOT_FOUND) + { + /* + * Path based #3: Mount dir + prefix + share + _ + number. + */ + if (offDst + 2 >= sizeof(szActualMountPoint)) + return iTable; + + szActualMountPoint[offDst++] = '_'; + for (uint32_t iTry = 1; iTry < 10 && rc != VWRN_NOT_FOUND; iTry++) + { + szActualMountPoint[offDst] = '0' + iTry; + szActualMountPoint[offDst + 1] = '\0'; + rc = vbsvcAutomounterQueryMountPoint(szActualMountPoint, pszName); + } + if (rc != VWRN_NOT_FOUND) + return iTable; + } + } + else + VGSvcError("vbsvcAutomounterMountNewEntry: Bad share name: %.*Rhxs", strlen(pszName), pszName); + } + else + VGSvcError("vbsvcAutomounterMountNewEntry: Failed to construct basic auto mount point for '%s'", pszName); + } +#endif + + /* + * Prepare a table entry and ensure space in the table.. + */ + if (pTable->cEntries + 1 > pTable->cAllocated) + { + void *pvEntries = RTMemRealloc(pTable->papEntries, sizeof(pTable->papEntries[0]) * (pTable->cAllocated + 8)); + if (!pvEntries) + { + VGSvcError("vbsvcAutomounterMountNewEntry: Out of memory for growing table (size %u)\n", pTable->cAllocated); + return iTable; + } + pTable->cAllocated += 8; + pTable->papEntries = (PVBSVCAUTOMOUNTERENTRY *)pvEntries; + } + + PVBSVCAUTOMOUNTERENTRY pEntry = (PVBSVCAUTOMOUNTERENTRY)RTMemAlloc(sizeof(*pEntry)); + if (pEntry) + { + pEntry->idRoot = idRoot; + pEntry->uRootIdVersion = uRootIdVersion; + pEntry->fFlags = fFlags; + pEntry->pszName = RTStrDup(pszName); + pEntry->pszMountPoint = RTStrDup(pszMntPt); + pEntry->pszActualMountPoint = RTStrDup(szActualMountPoint); + if (pEntry->pszName && pEntry->pszMountPoint && pEntry->pszActualMountPoint) + { + /* + * Now try mount it. + */ + rc = vbsvcAutomounterMountIt(pEntry); + if (RT_SUCCESS(rc)) + { + uint32_t cToMove = pTable->cEntries - iTable; + if (cToMove > 0) + memmove(&pTable->papEntries[iTable + 1], &pTable->papEntries[iTable], cToMove * sizeof(pTable->papEntries[0])); + pTable->papEntries[iTable] = pEntry; + pTable->cEntries++; + return iTable + 1; + } + } + else + VGSvcError("vbsvcAutomounterMountNewEntry: Out of memory for table entry!\n"); + RTMemFree(pEntry->pszActualMountPoint); + RTMemFree(pEntry->pszMountPoint); + RTMemFree(pEntry->pszName); + RTMemFree(pEntry); + } + else + VGSvcError("vbsvcAutomounterMountNewEntry: Out of memory for table entry!\n"); + return iTable; +} + + + +/** + * Does the actual unmounting. + * + * @returns Exactly one of the following IPRT status codes; + * @retval VINF_SUCCESS if successfully umounted or nothing was mounted there. + * @retval VERR_TRY_AGAIN if the shared folder is busy. + * @retval VERR_RESOURCE_BUSY if a different shared folder is mounted there. + * @retval VERR_ACCESS_DENIED if a non-shared folder file system is mounted + * there. + * + * @param pszMountPoint The mount point. + * @param pszName The shared folder (mapping) name. + */ +static int vbsvcAutomounterUnmount(const char *pszMountPoint, const char *pszName) +{ + /* + * Retry for 5 seconds in a hope that busy mounts will quiet down. + */ + for (unsigned iTry = 0; ; iTry++) + { + /* + * Check what's mounted there before we start umounting stuff. + */ + int rc = vbsvcAutomounterQueryMountPoint(pszMountPoint, pszName); + if (rc == VINF_SUCCESS) + { /* pszName is mounted there */ } + else if (rc == VWRN_NOT_FOUND) /* nothing mounted there */ + return VINF_SUCCESS; + else + { + Assert(rc == VERR_RESOURCE_BUSY || rc == VERR_ACCESS_DENIED); + return VERR_RESOURCE_BUSY; + } + + /* + * Do host specific unmounting. + */ +#ifdef RT_OS_WINDOWS + Assert(RT_C_IS_UPPER(pszMountPoint[0]) && pszMountPoint[1] == ':' && pszMountPoint[2] == '\0'); + RTUTF16 const wszDrive[4] = { (RTUTF16)pszMountPoint[0], ':', '\0', '\0' }; + DWORD dwErr = WNetCancelConnection2W(wszDrive, 0 /*dwFlags*/, FALSE /*fForce*/); + if (dwErr == NO_ERROR) + return VINF_SUCCESS; + VGSvcVerbose(2, "vbsvcAutomounterUnmount: WNetCancelConnection2W returns %u for '%s' ('%s')\n", dwErr, pszMountPoint, pszName); + if (dwErr == ERROR_NOT_CONNECTED) + return VINF_SUCCESS; + +#elif defined(RT_OS_OS2) + APIRET rcOs2 = DosFSAttach(pszMountPoint, "VBOXSF", NULL, 0, FS_DETACH); + if (rcOs2 == NO_ERROR) + return VINF_SUCCESS; + VGSvcVerbose(2, "vbsvcAutomounterUnmount: DosFSAttach failed on '%s' ('%s'): %u\n", pszMountPoint, pszName, rcOs2); + if (rcOs2 == ERROR_INVALID_FSD_NAME) + return VERR_ACCESS_DENIED; + if ( rcOs2 == ERROR_INVALID_DRIVE + || rcOs2 == ERROR_INVALID_PATH) + return VERR_TRY_AGAIN; + +#else + int rc2 = umount(pszMountPoint); + if (rc2 == 0) + { + /* Remove the mount directory if not directly under the root dir. */ + RTPATHPARSED Parsed; + RT_ZERO(Parsed); + RTPathParse(pszMountPoint, &Parsed, sizeof(Parsed), RTPATH_STR_F_STYLE_HOST); + if (Parsed.cComps >= 3) + RTDirRemove(pszMountPoint); + + return VINF_SUCCESS; + } + rc2 = errno; + VGSvcVerbose(2, "vbsvcAutomounterUnmount: umount failed on '%s' ('%s'): %d\n", pszMountPoint, pszName, rc2); + if (rc2 != EBUSY && rc2 != EAGAIN) + return VERR_ACCESS_DENIED; +#endif + + /* + * Check what's mounted there before we start delaying. + */ + RTThreadSleep(8); /* fudge */ + rc = vbsvcAutomounterQueryMountPoint(pszMountPoint, pszName); + if (rc == VINF_SUCCESS) + { /* pszName is mounted there */ } + else if (rc == VWRN_NOT_FOUND) /* nothing mounted there */ + return VINF_SUCCESS; + else + { + Assert(rc == VERR_RESOURCE_BUSY || rc == VERR_ACCESS_DENIED); + return VERR_RESOURCE_BUSY; + } + + if (iTry >= 5) + return VERR_TRY_AGAIN; + RTThreadSleep(1000); + } +} + + +/** + * Unmounts a mount table entry and evicts it from the table if successful. + * + * @returns The next iTable (same value on success, +1 on failure). + * @param pTable The mount table. + * @param iTable The table entry. + * @param pszReason Why we're here. + */ +static uint32_t vbsvcAutomounterUnmountEntry(PVBSVCAUTOMOUNTERTABLE pTable, uint32_t iTable, const char *pszReason) +{ + Assert(iTable < pTable->cEntries); + PVBSVCAUTOMOUNTERENTRY pEntry = pTable->papEntries[iTable]; + VGSvcVerbose(2, "vbsvcAutomounterUnmountEntry: #%u: '%s' at '%s' (reason: %s)\n", + iTable, pEntry->pszName, pEntry->pszActualMountPoint, pszReason); + + /* + * Do we need to umount the entry? Return if unmount fails and we . + */ + if (pEntry->pszActualMountPoint) + { + int rc = vbsvcAutomounterUnmount(pEntry->pszActualMountPoint, pEntry->pszName); + if (rc == VERR_TRY_AGAIN) + { + VGSvcVerbose(1, "vbsvcAutomounterUnmountEntry: Keeping '%s' -> '%s' (VERR_TRY_AGAIN)\n", + pEntry->pszActualMountPoint, pEntry->pszName); + return iTable + 1; + } + } + + /* + * Remove the entry by shifting up the ones after it. + */ + pTable->cEntries -= 1; + uint32_t cAfter = pTable->cEntries - iTable; + if (cAfter) + memmove(&pTable->papEntries[iTable], &pTable->papEntries[iTable + 1], cAfter * sizeof(pTable->papEntries[0])); + pTable->papEntries[pTable->cEntries] = NULL; + + RTStrFree(pEntry->pszActualMountPoint); + pEntry->pszActualMountPoint = NULL; + RTStrFree(pEntry->pszMountPoint); + pEntry->pszMountPoint = NULL; + RTStrFree(pEntry->pszName); + pEntry->pszName = NULL; + RTMemFree(pEntry); + + return iTable; +} + + +/** + * @callback_method_impl{FNRTSORTCMP, For sorting the mappings by ID. } + */ +static DECLCALLBACK(int) vbsvcSharedFolderMappingCompare(void const *pvElement1, void const *pvElement2, void *pvUser) +{ + RT_NOREF_PV(pvUser); + PVBGLR3SHAREDFOLDERMAPPING pMapping1 = (PVBGLR3SHAREDFOLDERMAPPING)pvElement1; + PVBGLR3SHAREDFOLDERMAPPING pMapping2 = (PVBGLR3SHAREDFOLDERMAPPING)pvElement2; + return pMapping1->u32Root < pMapping2->u32Root ? -1 : pMapping1->u32Root != pMapping2->u32Root ? 1 : 0; +} + + +/** + * Refreshes the mount table. + * + * @returns true if we've processed the current config, false if we failed to + * query the mappings. + * @param pTable The mount table to refresh. + */ +static bool vbsvcAutomounterRefreshTable(PVBSVCAUTOMOUNTERTABLE pTable) +{ + /* + * Query the root IDs of all auto-mountable shared folder mappings. + */ + uint32_t cMappings = 0; + PVBGLR3SHAREDFOLDERMAPPING paMappings = NULL; + int rc = VbglR3SharedFolderGetMappings(g_idClientSharedFolders, true /*fAutoMountOnly*/, &paMappings, &cMappings); + if (RT_FAILURE(rc)) + { + VGSvcError("vbsvcAutomounterRefreshTable: VbglR3SharedFolderGetMappings failed: %Rrc\n", rc); + return false; + } + + /* + * Walk the table and the mappings in parallel, so we have to make sure + * they are both sorted by root ID. + */ + if (cMappings > 1) + RTSortShell(paMappings, cMappings, sizeof(paMappings[0]), vbsvcSharedFolderMappingCompare, NULL); + + /* + * Pass #1: Do all the umounting. + * + * By doing the umount pass separately from the mount pass, we can + * better handle changing involving the same mount points (switching + * mount points between two shares, new share on same mount point but + * with lower root ID, ++). + */ + uint32_t iTable = 0; + for (uint32_t iSrc = 0; iSrc < cMappings; iSrc++) + { + /* + * Unmount table entries up to idRootSrc. + */ + uint32_t const idRootSrc = paMappings[iSrc].u32Root; + while ( iTable < pTable->cEntries + && pTable->papEntries[iTable]->idRoot < idRootSrc) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "dropped"); + + /* + * If the paMappings entry and the mount table entry has the same + * root ID, umount if anything has changed or if we cannot query + * the mapping data. + */ + if (iTable < pTable->cEntries) + { + PVBSVCAUTOMOUNTERENTRY pEntry = pTable->papEntries[iTable]; + if (pEntry->idRoot == idRootSrc) + { + uint32_t uRootIdVer = UINT32_MAX; + uint64_t fFlags = 0; + char *pszName = NULL; + char *pszMntPt = NULL; + rc = VbglR3SharedFolderQueryFolderInfo(g_idClientSharedFolders, idRootSrc, VBOXSERVICE_AUTOMOUNT_MIQF, + &pszName, &pszMntPt, &fFlags, &uRootIdVer); + if (RT_FAILURE(rc)) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "VbglR3SharedFolderQueryFolderInfo failed"); + else if (pEntry->uRootIdVersion != uRootIdVer) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "root ID version changed"); + else if (RTPathCompare(pEntry->pszMountPoint, pszMntPt) != 0) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "mount point changed"); + else if (RTStrICmp(pEntry->pszName, pszName) != 0) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "name changed"); + else + { + VGSvcVerbose(3, "vbsvcAutomounterRefreshTable: Unchanged: %s -> %s\n", pEntry->pszMountPoint, pEntry->pszName); + iTable++; + } + if (RT_SUCCESS(rc)) + { + RTStrFree(pszName); + RTStrFree(pszMntPt); + } + } + } + } + + while (iTable < pTable->cEntries) + iTable = vbsvcAutomounterUnmountEntry(pTable, iTable, "dropped (tail)"); + + VGSvcVerbose(4, "vbsvcAutomounterRefreshTable: %u entries in mount table after pass #1.\n", pTable->cEntries); + + /* + * Pass #2: Try mount new folders that has mount points assigned. + * Pass #3: Try mount new folders not mounted in pass #2. + */ + for (uint32_t iPass = 2; iPass <= 3; iPass++) + { + iTable = 0; + for (uint32_t iSrc = 0; iSrc < cMappings; iSrc++) + { + uint32_t const idRootSrc = paMappings[iSrc].u32Root; + + /* + * Skip tabel entries we couldn't umount in pass #1. + */ + while ( iTable < pTable->cEntries + && pTable->papEntries[iTable]->idRoot < idRootSrc) + { + VGSvcVerbose(4, "vbsvcAutomounterRefreshTable: %u/#%u/%#u: Skipping idRoot=%u %s\n", + iPass, iSrc, iTable, pTable->papEntries[iTable]->idRoot, pTable->papEntries[iTable]->pszName); + iTable++; + } + + /* + * New share? + */ + if ( iTable >= pTable->cEntries + || pTable->papEntries[iTable]->idRoot != idRootSrc) + { + uint32_t uRootIdVer = UINT32_MAX; + uint64_t fFlags = 0; + char *pszName = NULL; + char *pszMntPt = NULL; + rc = VbglR3SharedFolderQueryFolderInfo(g_idClientSharedFolders, idRootSrc, VBOXSERVICE_AUTOMOUNT_MIQF, + &pszName, &pszMntPt, &fFlags, &uRootIdVer); + if (RT_SUCCESS(rc)) + { + VGSvcVerbose(4, "vbsvcAutomounterRefreshTable: %u/#%u/%#u: Mounting idRoot=%u/%u %s\n", iPass, iSrc, iTable, + idRootSrc, iTable >= pTable->cEntries ? UINT32_MAX : pTable->papEntries[iTable]->idRoot, pszName); + iTable = vbsvcAutomounterMountNewEntry(pTable, iTable, pszName, pszMntPt, fFlags, + idRootSrc, uRootIdVer, iPass == 3); + + RTStrFree(pszName); + RTStrFree(pszMntPt); + } + else + VGSvcVerbose(1, "vbsvcAutomounterRefreshTable: VbglR3SharedFolderQueryFolderInfo failed: %Rrc\n", rc); + } + else + VGSvcVerbose(4, "vbsvcAutomounterRefreshTable: %u/#%u/%#u: idRootSrc=%u vs idRoot=%u %s\n", iPass, iSrc, + iTable, idRootSrc, pTable->papEntries[iTable]->idRoot, pTable->papEntries[iTable]->pszName); + } + } + + VbglR3SharedFolderFreeMappings(paMappings); + return true; +} + + +/** + * @interface_method_impl{VBOXSERVICE,pfnWorker} + */ +static DECLCALLBACK(int) vbsvcAutomounterWorker(bool volatile *pfShutdown) +{ + /* + * Tell the control thread that it can continue spawning services. + */ + RTThreadUserSignal(RTThreadSelf()); + + /* Divert old hosts to original auto-mount code. */ + if (!g_fHostSupportsWaitAndInfoQuery) + return vbsvcAutoMountWorkerOld(pfShutdown); + + /* + * Initialize the state in case we're restarted... + */ + VBSVCAUTOMOUNTERTABLE MountTable = { 0, 0, NULL }; + int rc = vbsvcAutomounterPopulateTable(&MountTable); + if (RT_FAILURE(rc)) + { + VGSvcError("vbsvcAutomounterWorker: vbsvcAutomounterPopulateTable failed (%Rrc), quitting!\n", rc); + return rc; + } + + /* + * Work loop. + */ + uint32_t uConfigVer = UINT32_MAX; + uint32_t uNewVersion = 0; + bool fForceRefresh = true; + while (!*pfShutdown) + { + /* + * Update the mounts. + */ + if ( uConfigVer != uNewVersion + || fForceRefresh) + { + fForceRefresh = !vbsvcAutomounterRefreshTable(&MountTable); + uConfigVer = uNewVersion; + } + + /* + * Wait for more to do. + */ + if (!*pfShutdown) + { + uNewVersion = uConfigVer - 1; + VGSvcVerbose(2, "vbsvcAutomounterWorker: Waiting with uConfigVer=%u\n", uConfigVer); + rc = VbglR3SharedFolderWaitForMappingsChanges(g_idClientSharedFolders, uConfigVer, &uNewVersion); + VGSvcVerbose(2, "vbsvcAutomounterWorker: Woke up with uNewVersion=%u and rc=%Rrc\n", uNewVersion, rc); + + /* Delay a little before doing a table refresh so the GUI can finish + all its updates. Delay a little longer on non-shutdown failure to + avoid eating too many CPU cycles if something goes wrong here... */ + if (!*pfShutdown) + RTSemEventMultiWait(g_hAutoMountEvent, RT_SUCCESS(rc) ? 256 : 1000); + } + } + + /* + * Destroy the mount table. + */ + while (MountTable.cEntries-- > 0) + RTMemFree(MountTable.papEntries[MountTable.cEntries]); + MountTable.papEntries = NULL; + + VGSvcVerbose(3, "vbsvcAutomounterWorker: Finished\n"); + return VINF_SUCCESS; +} + + +/** + * @interface_method_impl{VBOXSERVICE,pfnStop} + */ +static DECLCALLBACK(void) vbsvcAutomounterStop(void) +{ + RTSemEventMultiSignal(g_hAutoMountEvent); + if (g_fHostSupportsWaitAndInfoQuery) + VbglR3SharedFolderCancelMappingsChangesWaits(g_idClientSharedFolders); +} + + +/** + * @interface_method_impl{VBOXSERVICE,pfnTerm} + */ +static DECLCALLBACK(void) vbsvcAutomounterTerm(void) +{ + VGSvcVerbose(3, "vbsvcAutoMountTerm\n"); + + if (g_fHostSupportsWaitAndInfoQuery) + VbglR3SharedFolderCancelMappingsChangesWaits(g_idClientSharedFolders); + + VbglR3SharedFolderDisconnect(g_idClientSharedFolders); + g_idClientSharedFolders = 0; + + if (g_hAutoMountEvent != NIL_RTSEMEVENTMULTI) + { + RTSemEventMultiDestroy(g_hAutoMountEvent); + g_hAutoMountEvent = NIL_RTSEMEVENTMULTI; + } +} + + +/** + * The 'automount' service description. + */ +VBOXSERVICE g_AutoMount = +{ + /* pszName. */ + "automount", + /* pszDescription. */ + "Automounter for Shared Folders", + /* pszUsage. */ + NULL, + /* pszOptions. */ + NULL, + /* methods */ + VGSvcDefaultPreInit, + VGSvcDefaultOption, + vbsvcAutomounterInit, + vbsvcAutomounterWorker, + vbsvcAutomounterStop, + vbsvcAutomounterTerm +}; + |