Beispiel #1
0
static struct sf_dir_buf *sf_dir_buf_alloc(void)
{
    struct sf_dir_buf *b;

    TRACE();
    b = kmalloc(sizeof(*b), GFP_KERNEL);
    if (!b)
    {
        LogRelFunc(("could not alloc directory buffer\n"));
        return NULL;
    }

#ifdef USE_VMALLOC
    b->buf = vmalloc(DIR_BUFFER_SIZE);
#else
    b->buf = kmalloc(DIR_BUFFER_SIZE, GFP_KERNEL);
#endif
    if (!b->buf)
    {
        kfree(b);
        LogRelFunc(("could not alloc directory buffer storage\n"));
        return NULL;
    }

    INIT_LIST_HEAD(&b->head);
    b->cEntries = 0;
    b->cbUsed   = 0;
    b->cbFree   = DIR_BUFFER_SIZE;
    return b;
}
Beispiel #2
0
/**
 * Try to dynamically load the PulseAudio libraries.  This function is not
 * thread-safe, and should be called before attempting to use any of the
 * PulseAudio functions.
 *
 * @returns iprt status code
 */
int audioLoadPulseLib(void)
{
    int rc = VINF_SUCCESS;
    unsigned i;
    static enum { NO = 0, YES, FAIL } isLibLoaded = NO;
    RTLDRMOD hLib;

    LogFlowFunc(("\n"));
    /* If this is not NO then the function has obviously been called twice,
       which is likely to be a bug. */
    if (NO != isLibLoaded)
    {
        AssertMsgFailed(("isLibLoaded == %s\n", YES == isLibLoaded ? "YES" : "NO"));
        return YES == isLibLoaded ? VINF_SUCCESS : VERR_NOT_SUPPORTED;
    }
    isLibLoaded = FAIL;
    rc = RTLdrLoad(VBOX_PULSE_LIB, &hLib);
    if (RT_FAILURE(rc))
    {
        LogRelFunc(("Failed to load library %s\n", VBOX_PULSE_LIB));
        return rc;
    }
    for (i=0; i<RT_ELEMENTS(SharedFuncs); i++)
    {
        rc = RTLdrGetSymbol(hLib, SharedFuncs[i].name, (void**)SharedFuncs[i].fn);
        if (RT_FAILURE(rc))
            return rc;
    }
    isLibLoaded = YES;
    return rc;
}
 virtual int run(bool fDaemonised /* = false */)
 {
     int rc = vboxClipboardConnect();
     if (RT_SUCCESS(rc))
         rc = vboxClipboardMain();
     if (RT_FAILURE(rc))
         LogRelFunc(("guest clipboard service terminated abnormally: return code %Rrc\n", rc));
     return rc;
 }
/**
 * Waits for a seamless state change events from the host and dispatch it.
 *
 * @returns        IRPT return code.
 */
int SeamlessMain::nextStateChangeEvent(void)
{
    VMMDevSeamlessMode newMode = VMMDev_Seamless_Disabled;

    LogRelFlowFunc(("\n"));
    int rc = VbglR3SeamlessWaitEvent(&newMode);
    if (RT_SUCCESS(rc))
    {
        mMode = newMode;
        switch (newMode)
        {
            case VMMDev_Seamless_Visible_Region:
            /* A simplified seamless mode, obtained by making the host VM window
             * borderless and making the guest desktop transparent. */
                LogRelFlowFunc(("\"Visible region\" mode requested (VBoxClient).\n"));
                break;
            case VMMDev_Seamless_Disabled:
                LogRelFlowFunc(("\"Disabled\" mode requested (VBoxClient).\n"));
                break;
            case VMMDev_Seamless_Host_Window:
            /* One host window represents one guest window.  Not yet implemented. */
                LogRelFunc(("Unsupported \"host window\" mode requested (VBoxClient).\n"));
                return VERR_NOT_SUPPORTED;
            default:
                LogRelFunc(("Unsupported mode %d requested (VBoxClient).\n",
                            newMode));
                return VERR_NOT_SUPPORTED;
        }
    }
    if (RT_SUCCESS(rc) || rc == VERR_TRY_AGAIN)
    {
        if (mMode == VMMDev_Seamless_Visible_Region)
            mfPaused = false;
        else
            mfPaused = true;
        mX11Monitor.interruptEventWait();
    }
    else
    {
        LogRelFunc(("VbglR3SeamlessWaitEvent returned %Rrc (VBoxClient)\n", rc));
    }
    LogRelFlowFunc(("returning %Rrc\n", rc));
    return rc;
}
Beispiel #5
0
/**
 * This should allocate memory for sf_inode_info, compute a unique inode
 * number, get an inode from vfs, initialize inode info, instantiate
 * dentry.
 *
 * @param parent        inode entry of the directory
 * @param dentry        directory cache entry
 * @param path          path name
 * @param info          file information
 * @param handle        handle
 * @returns 0 on success, Linux error code otherwise
 */
static int sf_instantiate(struct inode *parent, struct dentry *dentry,
                          SHFLSTRING *path, PSHFLFSOBJINFO info, SHFLHANDLE handle)
{
    int err;
    ino_t ino;
    struct inode *inode;
    struct sf_inode_info *sf_new_i;
    struct sf_glob_info *sf_g = GET_GLOB_INFO(parent->i_sb);

    TRACE();
    BUG_ON(!sf_g);

    sf_new_i = kmalloc(sizeof(*sf_new_i), GFP_KERNEL);
    if (!sf_new_i)
    {
        LogRelFunc(("could not allocate inode info.\n"));
        err = -ENOMEM;
        goto fail0;
    }

    ino = iunique(parent->i_sb, 1);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    inode = iget_locked(parent->i_sb, ino);
#else
    inode = iget(parent->i_sb, ino);
#endif
    if (!inode)
    {
        LogFunc(("iget failed\n"));
        err = -ENOMEM;
        goto fail1;
    }

    sf_init_inode(sf_g, inode, info);
    sf_new_i->path = path;
    SET_INODE_INFO(inode, sf_new_i);
    sf_new_i->force_restat = 1;
    sf_new_i->force_reread = 0;

    d_instantiate(dentry, inode);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    unlock_new_inode(inode);
#endif

    /* Store this handle if we leave the handle open. */
    sf_new_i->handle = handle;
    return 0;

fail1:
    kfree(sf_new_i);

fail0:
    return err;

}
/**
 * Update the set of visible rectangles in the host.
 */
static void sendRegionUpdate(RTRECT *pRects, size_t cRects)
{
    LogRelFlowFunc(("\n"));
    if (cRects && !pRects)  /* Assertion */
    {
        LogRelFunc(("ERROR: called with null pointer!\n"));
        return;
    }
    VbglR3SeamlessSendRects(cRects, pRects);
    LogRelFlowFunc(("returning\n"));
}
Beispiel #7
0
static int sf_make_path(const char *caller, struct sf_inode_info *sf_i,
                        const char *d_name, size_t d_len, SHFLSTRING **result)
{
    size_t path_len, shflstring_len;
    SHFLSTRING *tmp;
    uint16_t p_len;
    uint8_t *p_name;
    int fRoot = 0;

    TRACE();
    p_len = sf_i->path->u16Length;
    p_name = sf_i->path->String.utf8;

    if (p_len == 1 && *p_name == '/')
    {
        path_len = d_len + 1;
        fRoot = 1;
    }
    else
    {
        /* lengths of constituents plus terminating zero plus slash  */
        path_len = p_len + d_len + 2;
        if (path_len > 0xffff)
        {
            LogFunc(("path too long.  caller=%s, path_len=%zu\n", caller, path_len));
            return -ENAMETOOLONG;
        }
    }

    shflstring_len = offsetof(SHFLSTRING, String.utf8) + path_len;
    tmp = kmalloc(shflstring_len, GFP_KERNEL);
    if (!tmp)
    {
        LogRelFunc(("kmalloc failed, caller=%s\n", caller));
        return -ENOMEM;
    }
    tmp->u16Length = path_len - 1;
    tmp->u16Size = path_len;

    if (fRoot)
        memcpy(&tmp->String.utf8[0], d_name, d_len + 1);
    else
    {
        memcpy(&tmp->String.utf8[0], p_name, p_len);
        tmp->String.utf8[p_len] = '/';
        memcpy(&tmp->String.utf8[p_len + 1], d_name, d_len);
        tmp->String.utf8[p_len + 1 + d_len] = '\0';
    }

    *result = tmp;
    return 0;
}
Beispiel #8
0
/**
 * This is called when vfs wants to populate internal buffers with
 * directory [dir]s contents. [opaque] is an argument to the
 * [filldir]. [filldir] magically modifies it's argument - [opaque]
 * and takes following additional arguments (which i in turn get from
 * the host via sf_getdent):
 *
 * name : name of the entry (i must also supply it's length huh?)
 * type : type of the entry (FILE | DIR | etc) (i ellect to use DT_UNKNOWN)
 * pos : position/index of the entry
 * ino : inode number of the entry (i fake those)
 *
 * [dir] contains:
 * f_pos : cursor into the directory listing
 * private_data : mean of communication with the host side
 *
 * Extract elements from the directory listing (incrementing f_pos
 * along the way) and feed them to [filldir] until:
 *
 * a. there are no more entries (i.e. sf_getdent set done to 1)
 * b. failure to compute fake inode number
 * c. filldir returns an error (see comment on that)
 */
static int sf_dir_read (struct file *dir, void *opaque, filldir_t filldir)
{
    TRACE();
    for (;;)
    {
        int err;
        ino_t fake_ino;
        loff_t sanity;
        char d_name[NAME_MAX];

        err = sf_getdent(dir, d_name);
        switch (err)
        {
            case 1:
                return 0;

            case 0:
                break;

            case -1:
            default:
                /* skip erroneous entry and proceed */
                LogFunc(("sf_getdent error %d\n", err));
                dir->f_pos += 1;
                continue;
        }

        /* d_name now contains a valid entry name */

        sanity = dir->f_pos + 0xbeef;
        fake_ino = sanity;
        if (sanity - fake_ino)
        {
            LogRelFunc(("can not compute ino\n"));
            return -EINVAL;
        }

        err = filldir(opaque, d_name, strlen(d_name),
                      dir->f_pos, fake_ino, DT_UNKNOWN);
        if (err)
        {
            LogFunc(("filldir returned error %d\n", err));
            /* Rely on the fact that filldir returns error
               only when it runs out of space in opaque */
            return 0;
        }

        dir->f_pos += 1;
    }

    BUG();
}
/**
 * Start the X11 window configuration change monitor thread.
 */
int SeamlessMain::startX11MonitorThread(void)
{
    int rc;

    mX11MonitorThreadStopping = false;
    if (isX11MonitorThreadRunning())
        return VINF_SUCCESS;
    rc = RTThreadCreate(&mX11MonitorThread, x11MonitorThread, this, 0,
                        RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE,
                        "X11 events");
    if (RT_FAILURE(rc))
        LogRelFunc(("Warning: failed to start X11 monitor thread (VBoxClient).\n"));
    return rc;
}
Beispiel #10
0
/**
 * Create a new directory buffer descriptor.
 */
struct sf_dir_info *sf_dir_info_alloc(void)
{
    struct sf_dir_info *p;

    TRACE();
    p = kmalloc(sizeof(*p), GFP_KERNEL);
    if (!p)
    {
        LogRelFunc(("could not alloc directory info\n"));
        return NULL;
    }

    INIT_LIST_HEAD(&p->info_list);
    return p;
}
Beispiel #11
0
static int run(struct VBCLSERVICE **ppInterface, bool fDaemonised)
{
    int rc;

    NOREF(ppInterface);
    /* Initialise the guest library. */
    rc = VbglR3InitUser();
    if (RT_FAILURE(rc))
        VBClFatalError(("Failed to connect to the VirtualBox kernel service, rc=%Rrc\n", rc));
    rc = vboxClipboardConnect();
    /* Not RT_SUCCESS: VINF_PERMISSION_DENIED is host service not present. */
    if (rc == VINF_SUCCESS)
        rc = vboxClipboardMain();
    if (rc == VERR_NOT_SUPPORTED)
        rc = VINF_SUCCESS;  /* Prevent automatic restart. */
    if (RT_FAILURE(rc))
        LogRelFunc(("guest clipboard service terminated abnormally: return code %Rrc\n", rc));
    return rc;
}
Beispiel #12
0
/**
 * This is called (by sf_read_super_[24|26] when vfs mounts the fs and
 * wants to read super_block.
 *
 * calls [sf_glob_alloc] to map the folder and allocate global
 * information structure.
 *
 * initializes [sb], initializes root inode and dentry.
 *
 * should respect [flags]
 */
static int sf_read_super_aux(struct super_block *sb, void *data, int flags)
{
    int err;
    struct dentry *droot;
    struct inode *iroot;
    struct sf_inode_info *sf_i;
    struct sf_glob_info *sf_g;
    SHFLFSOBJINFO fsinfo;
    struct vbsf_mount_info_new *info;

    TRACE();
    if (!data)
    {
        LogFunc(("no mount info specified\n"));
        return -EINVAL;
    }

    info = data;

    if (flags & MS_REMOUNT)
    {
        LogFunc(("remounting is not supported\n"));
        return -ENOSYS;
    }

    err = sf_glob_alloc(info, &sf_g);
    if (err)
        goto fail0;

    sf_i = kmalloc(sizeof (*sf_i), GFP_KERNEL);
    if (!sf_i)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for root inode info\n"));
        goto fail1;
    }

    sf_i->handle = SHFL_HANDLE_NIL;
    sf_i->path = kmalloc(sizeof(SHFLSTRING) + 1, GFP_KERNEL);
    if (!sf_i->path)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for root inode path\n"));
        goto fail2;
    }

    sf_i->path->u16Length = 1;
    sf_i->path->u16Size = 2;
    sf_i->path->String.utf8[0] = '/';
    sf_i->path->String.utf8[1] = 0;

    err = sf_stat(__func__, sf_g, sf_i->path, &fsinfo, 0);
    if (err)
    {
        LogFunc(("could not stat root of share\n"));
        goto fail3;
    }

    sb->s_magic = 0xface;
    sb->s_blocksize = 1024;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 3)
    /* Required for seek/sendfile.
     *
     * Must by less than or equal to INT64_MAX despite the fact that the
     * declaration of this variable is unsigned long long. See determination
     * of 'loff_t max' in fs/read_write.c / do_sendfile(). I don't know the
     * correct limit but MAX_LFS_FILESIZE (8TB-1 on 32-bit boxes) takes the
     * page cache into account and is the suggested limit. */
# if defined MAX_LFS_FILESIZE
    sb->s_maxbytes = MAX_LFS_FILESIZE;
# else
    sb->s_maxbytes = 0x7fffffffffffffffULL;
# endif
#endif
    sb->s_op = &sf_super_ops;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    iroot = iget_locked(sb, 0);
#else
    iroot = iget(sb, 0);
#endif
    if (!iroot)
    {
        err = -ENOMEM;  /* XXX */
        LogFunc(("could not get root inode\n"));
        goto fail3;
    }

    if (sf_init_backing_dev(sf_g))
    {
        err = -EINVAL;
        LogFunc(("could not init bdi\n"));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
        unlock_new_inode(iroot);
#endif
        goto fail4;
    }

    sf_init_inode(sf_g, iroot, &fsinfo);
    SET_INODE_INFO(iroot, sf_i);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    unlock_new_inode(iroot);
#endif

    droot = d_alloc_root(iroot);
    if (!droot)
    {
        err = -ENOMEM;  /* XXX */
        LogFunc(("d_alloc_root failed\n"));
        goto fail5;
    }

    sb->s_root = droot;
    SET_GLOB_INFO(sb, sf_g);
    return 0;

fail5:
    sf_done_backing_dev(sf_g);

fail4:
    iput(iroot);

fail3:
    kfree(sf_i->path);

fail2:
    kfree(sf_i);

fail1:
    sf_glob_free(sf_g);

fail0:
    return err;
}
Beispiel #13
0
static int sf_symlink(struct inode *parent, struct dentry *dentry, const char *symname)
{
    int err;
    int rc;
    struct sf_inode_info *sf_i;
    struct sf_glob_info *sf_g;
    SHFLSTRING *path, *ssymname;
    SHFLFSOBJINFO info;
    int symname_len = strlen(symname) + 1;

    TRACE();
    sf_g = GET_GLOB_INFO(parent->i_sb);
    sf_i = GET_INODE_INFO(parent);

    BUG_ON(!sf_g);
    BUG_ON(!sf_i);

    err = sf_path_from_dentry(__func__, sf_g, sf_i, dentry, &path);
    if (err)
        goto fail0;

    ssymname = kmalloc(offsetof(SHFLSTRING, String.utf8) + symname_len, GFP_KERNEL);
    if (!ssymname)
    {
        LogRelFunc(("kmalloc failed, caller=sf_symlink\n"));
        err = -ENOMEM;
        goto fail1;
    }

    ssymname->u16Length = symname_len - 1;
    ssymname->u16Size = symname_len;
    memcpy(ssymname->String.utf8, symname, symname_len);

    rc = vboxCallSymlink(&client_handle, &sf_g->map, path, ssymname, &info);
    kfree(ssymname);

    if (RT_FAILURE(rc))
    {
        if (rc == VERR_WRITE_PROTECT)
        {
            err = -EROFS;
            goto fail1;
        }
        LogFunc(("vboxCallSymlink(%s) failed rc=%Rrc\n",
                    sf_i->path->String.utf8, rc));
        err = -EPROTO;
        goto fail1;
    }

    err = sf_instantiate(parent, dentry, path, &info, SHFL_HANDLE_NIL);
    if (err)
    {
        LogFunc(("could not instantiate dentry for %s err=%d\n",
                 sf_i->path->String.utf8, err));
        goto fail1;
    }

    sf_i->force_restat = 1;
    return 0;

fail1:
    kfree(path);
fail0:
    return err;
}
Beispiel #14
0
/**
 * Open a regular file.
 *
 * @param inode         the inode
 * @param file          the file
 * @returns 0 on success, Linux error code otherwise
 */
static int sf_reg_open(struct inode *inode, struct file *file)
{
    int rc, rc_linux = 0;
    struct sf_glob_info *sf_g = GET_GLOB_INFO(inode->i_sb);
    struct sf_inode_info *sf_i = GET_INODE_INFO(inode);
    struct sf_reg_info *sf_r;
    SHFLCREATEPARMS params;

    TRACE();
    BUG_ON(!sf_g);
    BUG_ON(!sf_i);

    LogFunc(("open %s\n", sf_i->path->String.utf8));

    sf_r = kmalloc(sizeof(*sf_r), GFP_KERNEL);
    if (!sf_r)
    {
        LogRelFunc(("could not allocate reg info\n"));
        return -ENOMEM;
    }

    /* Already open? */
    if (sf_i->handle != SHFL_HANDLE_NIL)
    {
        /*
         * This inode was created with sf_create_aux(). Check the CreateFlags:
         * O_CREAT, O_TRUNC: inherent true (file was just created). Not sure
         * about the access flags (SHFL_CF_ACCESS_*).
         */
        sf_i->force_restat = 1;
        sf_r->handle = sf_i->handle;
        sf_i->handle = SHFL_HANDLE_NIL;
        sf_i->file = file;
        file->private_data = sf_r;
        return 0;
    }

    RT_ZERO(params);
    params.Handle = SHFL_HANDLE_NIL;
    /* We check the value of params.Handle afterwards to find out if
     * the call succeeded or failed, as the API does not seem to cleanly
     * distinguish error and informational messages.
     *
     * Furthermore, we must set params.Handle to SHFL_HANDLE_NIL to
     * make the shared folders host service use our fMode parameter */

    if (file->f_flags & O_CREAT)
    {
        LogFunc(("O_CREAT set\n"));
        params.CreateFlags |= SHFL_CF_ACT_CREATE_IF_NEW;
        /* We ignore O_EXCL, as the Linux kernel seems to call create
           beforehand itself, so O_EXCL should always fail. */
        if (file->f_flags & O_TRUNC)
        {
            LogFunc(("O_TRUNC set\n"));
            params.CreateFlags |= (  SHFL_CF_ACT_OVERWRITE_IF_EXISTS
                                   | SHFL_CF_ACCESS_WRITE);
        }
        else
            params.CreateFlags |= SHFL_CF_ACT_OPEN_IF_EXISTS;
    }
    else
    {
        params.CreateFlags |= SHFL_CF_ACT_FAIL_IF_NEW;
        if (file->f_flags & O_TRUNC)
        {
            LogFunc(("O_TRUNC set\n"));
            params.CreateFlags |= (  SHFL_CF_ACT_OVERWRITE_IF_EXISTS
                    | SHFL_CF_ACCESS_WRITE);
        }
    }

    if (!(params.CreateFlags & SHFL_CF_ACCESS_READWRITE))
    {
        switch (file->f_flags & O_ACCMODE)
        {
            case O_RDONLY:
                params.CreateFlags |= SHFL_CF_ACCESS_READ;
                break;

            case O_WRONLY:
                params.CreateFlags |= SHFL_CF_ACCESS_WRITE;
                break;

            case O_RDWR:
                params.CreateFlags |= SHFL_CF_ACCESS_READWRITE;
                break;

            default:
                BUG ();
        }
    }

    if (file->f_flags & O_APPEND)
    {
        LogFunc(("O_APPEND set\n"));
        params.CreateFlags |= SHFL_CF_ACCESS_APPEND;
    }

    params.Info.Attr.fMode = inode->i_mode;
    LogFunc(("sf_reg_open: calling vboxCallCreate, file %s, flags=%#x, %#x\n",
              sf_i->path->String.utf8 , file->f_flags, params.CreateFlags));
    rc = vboxCallCreate(&client_handle, &sf_g->map, sf_i->path, &params);
    if (RT_FAILURE(rc))
    {
        LogFunc(("vboxCallCreate failed flags=%d,%#x rc=%Rrc\n",
                  file->f_flags, params.CreateFlags, rc));
        kfree(sf_r);
        return -RTErrConvertToErrno(rc);
    }

    if (SHFL_HANDLE_NIL == params.Handle)
    {
        switch (params.Result)
        {
            case SHFL_PATH_NOT_FOUND:
            case SHFL_FILE_NOT_FOUND:
                rc_linux = -ENOENT;
                break;
            case SHFL_FILE_EXISTS:
                rc_linux = -EEXIST;
                break;
            default:
                break;
        }
    }

    sf_i->force_restat = 1;
    sf_r->handle = params.Handle;
    sf_i->file = file;
    file->private_data = sf_r;
    return rc_linux;
}
Beispiel #15
0
/* allocate global info, try to map host share */
static int sf_glob_alloc(struct vbsf_mount_info_new *info, struct sf_glob_info **sf_gp)
{
    int err, rc;
    SHFLSTRING *str_name;
    size_t name_len, str_len;
    struct sf_glob_info *sf_g;

    TRACE();
    sf_g = kmalloc(sizeof(*sf_g), GFP_KERNEL);
    if (!sf_g)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for global info\n"));
        goto fail0;
    }

    RT_ZERO(*sf_g);

    if (   info->nullchar     != '\0'
        || info->signature[0] != VBSF_MOUNT_SIGNATURE_BYTE_0
        || info->signature[1] != VBSF_MOUNT_SIGNATURE_BYTE_1
        || info->signature[2] != VBSF_MOUNT_SIGNATURE_BYTE_2)
    {
        /* An old version of mount.vboxsf made the syscall. Translate the
         * old parameters to the new structure. */
        struct vbsf_mount_info_old *info_old = (struct vbsf_mount_info_old *)info;
        static struct vbsf_mount_info_new info_compat;

        info = &info_compat;
        memset(info, 0, sizeof(*info));
        memcpy(&info->name, &info_old->name, MAX_HOST_NAME);
        memcpy(&info->nls_name, &info_old->nls_name, MAX_NLS_NAME);
        info->length = offsetof(struct vbsf_mount_info_new, dmode);
        info->uid    = info_old->uid;
        info->gid    = info_old->gid;
        info->ttl    = info_old->ttl;
    }

    info->name[sizeof(info->name) - 1] = 0;
    info->nls_name[sizeof(info->nls_name) - 1] = 0;

    name_len = strlen(info->name);
    if (name_len > 0xfffe)
    {
        err = -ENAMETOOLONG;
        LogFunc(("map name too big\n"));
        goto fail1;
    }

    str_len = offsetof(SHFLSTRING, String.utf8) + name_len + 1;
    str_name = kmalloc(str_len, GFP_KERNEL);
    if (!str_name)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for host name\n"));
        goto fail1;
    }

    str_name->u16Length = name_len;
    str_name->u16Size = name_len + 1;
    memcpy(str_name->String.utf8, info->name, name_len + 1);

    if (info->nls_name[0] && strcmp(info->nls_name, "utf8"))
    {
        sf_g->nls = load_nls(info->nls_name);
        if (!sf_g->nls)
        {
            err = -EINVAL;
            LogFunc(("failed to load nls %s\n", info->nls_name));
            goto fail1;
        }
    }
    else
        sf_g->nls = NULL;

    rc = vboxCallMapFolder(&client_handle, str_name, &sf_g->map);
    kfree(str_name);

    if (RT_FAILURE(rc))
    {
        err = -EPROTO;
        LogFunc(("vboxCallMapFolder failed rc=%d\n", rc));
        goto fail2;
    }

    sf_g->ttl = info->ttl;
    sf_g->uid = info->uid;
    sf_g->gid = info->gid;

    if ((unsigned)info->length >= sizeof(struct vbsf_mount_info_new))
    {
        /* new fields */
        sf_g->dmode = info->dmode;
        sf_g->fmode = info->fmode;
        sf_g->dmask = info->dmask;
        sf_g->fmask = info->fmask;
    }
    else
    {
        sf_g->dmode = ~0;
        sf_g->fmode = ~0;
    }

    *sf_gp = sf_g;
    return 0;

fail2:
    if (sf_g->nls)
        unload_nls(sf_g->nls);

fail1:
    kfree(sf_g);

fail0:
    return err;
}
Beispiel #16
0
/* Module initialization/finalization handlers */
static int __init init(void)
{
    int rcVBox;
    int rcRet = 0;
    int err;

    TRACE();

    if (sizeof(struct vbsf_mount_info_new) > PAGE_SIZE)
    {
        printk(KERN_ERR
                "Mount information structure is too large %lu\n"
                "Must be less than or equal to %lu\n",
                (unsigned long)sizeof (struct vbsf_mount_info_new),
                (unsigned long)PAGE_SIZE);
        return -EINVAL;
    }

    err = register_filesystem(&vboxsf_fs_type);
    if (err)
    {
        LogFunc(("register_filesystem err=%d\n", err));
        return err;
    }

    rcVBox = vboxInit();
    if (RT_FAILURE(rcVBox))
    {
        LogRelFunc(("vboxInit failed, rc=%d\n", rcVBox));
        rcRet = -EPROTO;
        goto fail0;
    }

    rcVBox = vboxConnect(&client_handle);
    if (RT_FAILURE(rcVBox))
    {
        LogRelFunc(("vboxConnect failed, rc=%d\n", rcVBox));
        rcRet = -EPROTO;
        goto fail1;
    }

    rcVBox = vboxCallSetUtf8(&client_handle);
    if (RT_FAILURE(rcVBox))
    {
        LogRelFunc(("vboxCallSetUtf8 failed, rc=%d\n", rcVBox));
        rcRet = -EPROTO;
        goto fail2;
    }

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
    if (!follow_symlinks)
    {
        rcVBox = vboxCallSetSymlinks(&client_handle);
        if (RT_FAILURE(rcVBox))
        {
            printk(KERN_WARNING
                     "vboxsf: Host unable to show symlinks, rc=%d\n",
                     rcVBox);
        }
    }
#endif

    printk(KERN_DEBUG
            "vboxsf: Successfully loaded version " VBOX_VERSION_STRING
            " (interface " RT_XSTR(VMMDEV_VERSION) ")\n");

    return 0;

fail2:
    vboxDisconnect(&client_handle);

fail1:
    vboxUninit();

fail0:
    unregister_filesystem(&vboxsf_fs_type);
    return rcRet;
}
/**
 * Enables the Hyper-V TSC page.
 *
 * @returns VBox status code.
 * @param   pVM                Pointer to the VM.
 * @param   GCPhysTscPage      Where to map the TSC page.
 * @param   fUseThisTscSeq     Whether to set the TSC sequence number to the one
 *                             specified in @a uTscSeq.
 * @param   uTscSeq            The TSC sequence value to use. Ignored if
 *                             @a fUseThisTscSeq is false.
 */
VMMR3_INT_DECL(int) gimR3HvEnableTscPage(PVM pVM, RTGCPHYS GCPhysTscPage, bool fUseThisTscSeq, uint32_t uTscSeq)
{
    PPDMDEVINSR3    pDevIns = pVM->gim.s.pDevInsR3;
    PGIMMMIO2REGION pRegion = &pVM->gim.s.u.Hv.aMmio2Regions[GIM_HV_REF_TSC_PAGE_REGION_IDX];
    AssertPtrReturn(pDevIns, VERR_GIM_DEVICE_NOT_REGISTERED);

    int rc;
    if (pRegion->fMapped)
    {
        /*
         * Is it already enabled at the given guest-address?
         */
        if (pRegion->GCPhysPage == GCPhysTscPage)
            return VINF_SUCCESS;

        /*
         * If it's mapped at a different address, unmap the previous address.
         */
        rc = gimR3HvDisableTscPage(pVM);
        AssertRC(rc);
    }

    /*
     * Map the TSC-page at the specified address.
     */
    Assert(!pRegion->fMapped);
    rc = GIMR3Mmio2Map(pVM, pRegion, GCPhysTscPage);
    if (RT_SUCCESS(rc))
    {
        Assert(pRegion->GCPhysPage == GCPhysTscPage);

        /*
         * Update the TSC scale. Windows guests expect a non-zero TSC sequence, otherwise
         * they fallback to using the reference count MSR which is not ideal in terms of VM-exits.
         *
         * Also, Hyper-V normalizes the time in 10 MHz, see:
         * http://technet.microsoft.com/it-it/sysinternals/dn553408%28v=vs.110%29
         */
        PGIMHVREFTSC pRefTsc = (PGIMHVREFTSC)pRegion->pvPageR3;
        Assert(pRefTsc);

        uint64_t const u64TscKHz = TMCpuTicksPerSecond(pVM) / UINT64_C(1000);
        uint32_t       u32TscSeq = 1;
        if (   fUseThisTscSeq
            && uTscSeq < UINT32_C(0xfffffffe))
            u32TscSeq = uTscSeq + 1;
        pRefTsc->u32TscSequence  = u32TscSeq;
        pRefTsc->u64TscScale     = ((INT64_C(10000) << 32) / u64TscKHz) << 32;
        pRefTsc->i64TscOffset    = 0;

        LogRel(("GIM: HyperV: Enabled TSC page at %#RGp - u64TscScale=%#RX64 u64TscKHz=%#RX64 (%'RU64) Seq=%#RU32\n",
                GCPhysTscPage, pRefTsc->u64TscScale, u64TscKHz, u64TscKHz, pRefTsc->u32TscSequence));

        TMR3CpuTickParavirtEnable(pVM);
        return VINF_SUCCESS;
    }
    else
        LogRelFunc(("GIMR3Mmio2Map failed. rc=%Rrc\n", rc));

    return VERR_GIM_OPERATION_FAILED;
}
Beispiel #18
0
static int sf_dir_read(struct file *dir, void *opaque, filldir_t filldir)
#endif
{
    TRACE();
    for (;;)
    {
        int err;
        ino_t fake_ino;
        loff_t sanity;
        char d_name[NAME_MAX];
        int d_type = DT_UNKNOWN;

        err = sf_getdent(dir, d_name, &d_type);
        switch (err)
        {
            case 1:
                return 0;

            case 0:
                break;

            case -1:
            default:
                /* skip erroneous entry and proceed */
                LogFunc(("sf_getdent error %d\n", err));
                dir->f_pos += 1;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
                ctx->pos += 1;
#endif
                continue;
        }

        /* d_name now contains a valid entry name */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
        sanity = ctx->pos + 0xbeef;
#else
        sanity = dir->f_pos + 0xbeef;
#endif
        fake_ino = sanity;
        if (sanity - fake_ino)
        {
            LogRelFunc(("can not compute ino\n"));
            return -EINVAL;
        }

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
        if (!dir_emit(ctx, d_name, strlen(d_name), fake_ino, d_type))
        {
            LogFunc(("dir_emit failed\n"));
            return 0;
        }
#else
        err = filldir(opaque, d_name, strlen(d_name), dir->f_pos, fake_ino, d_type);
        if (err)
        {
            LogFunc(("filldir returned error %d\n", err));
            /* Rely on the fact that filldir returns error
               only when it runs out of space in opaque */
            return 0;
        }
#endif

        dir->f_pos += 1;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
        ctx->pos += 1;
#endif
    }

    BUG();
}
Beispiel #19
0
/**
 * Open a directory. Read the complete content into a buffer.
 *
 * @param inode     inode
 * @param file      file
 * @returns 0 on success, Linux error code otherwise
 */
static int sf_dir_open(struct inode *inode, struct file *file)
{
    int rc;
    int err;
    struct sf_glob_info *sf_g = GET_GLOB_INFO(inode->i_sb);
    struct sf_dir_info *sf_d;
    struct sf_inode_info *sf_i = GET_INODE_INFO(inode);
    SHFLCREATEPARMS params;

    TRACE();
    BUG_ON(!sf_g);
    BUG_ON(!sf_i);

    if (file->private_data)
    {
        LogFunc(("sf_dir_open() called on already opened directory '%s'\n",
                sf_i->path->String.utf8));
        return 0;
    }

    sf_d = sf_dir_info_alloc();
    if (!sf_d)
    {
        LogRelFunc(("could not allocate directory info for '%s'\n",
                    sf_i->path->String.utf8));
        return -ENOMEM;
    }

    RT_ZERO(params);
    params.Handle = SHFL_HANDLE_NIL;
    params.CreateFlags = 0
                       | SHFL_CF_DIRECTORY
                       | SHFL_CF_ACT_OPEN_IF_EXISTS
                       | SHFL_CF_ACT_FAIL_IF_NEW
                       | SHFL_CF_ACCESS_READ
                       ;

    LogFunc(("sf_dir_open(): calling vboxCallCreate, folder %s, flags %#x\n",
             sf_i->path->String.utf8, params.CreateFlags));
    rc = vboxCallCreate(&client_handle, &sf_g->map, sf_i->path, &params);
    if (RT_SUCCESS(rc))
    {
        if (params.Result == SHFL_FILE_EXISTS)
        {
            err = sf_dir_read_all(sf_g, sf_i, sf_d, params.Handle);
            if (!err)
                file->private_data = sf_d;
        }
        else
            err = -ENOENT;

        rc = vboxCallClose(&client_handle, &sf_g->map, params.Handle);
        if (RT_FAILURE(rc))
            LogFunc(("sf_dir_open(): vboxCallClose(%s) after err=%d failed rc=%Rrc\n",
                     sf_i->path->String.utf8, err, rc));
    }
    else
        err = -EPERM;

    if (err)
        sf_dir_info_free(sf_d);

    return err;
}
Beispiel #20
0
int sf_dir_read_all(struct sf_glob_info *sf_g, struct sf_inode_info *sf_i,
                    struct sf_dir_info *sf_d, SHFLHANDLE handle)
{
    int err;
    SHFLSTRING *mask;
    struct sf_dir_buf *b;

    TRACE();
    err = sf_make_path(__func__, sf_i, "*", 1, &mask);
    if (err)
        goto fail0;

    for (;;)
    {
        int rc;
        void *buf;
        uint32_t cbSize;
        uint32_t cEntries;

        b = sf_get_empty_dir_buf(sf_d);
        if (!b)
        {
            b = sf_dir_buf_alloc();
            if (!b)
            {
                err = -ENOMEM;
                LogRelFunc(("could not alloc directory buffer\n"));
                goto fail1;
            }
            list_add(&b->head, &sf_d->info_list);
        }

        buf = b->buf;
        cbSize = b->cbFree;

        rc = VbglR0SfDirInfo(&client_handle, &sf_g->map, handle, mask,
                             0, 0, &cbSize, buf, &cEntries);
        switch (rc)
        {
            case VINF_SUCCESS:
                /* fallthrough */
            case VERR_NO_MORE_FILES:
                break;
            case VERR_NO_TRANSLATION:
                LogFunc(("host could not translate entry\n"));
                /* XXX */
                break;
            default:
                err = -RTErrConvertToErrno(rc);
                LogFunc(("VbglR0SfDirInfo failed rc=%Rrc\n", rc));
                goto fail1;
        }

        b->cEntries += cEntries;
        b->cbFree   -= cbSize;
        b->cbUsed   += cbSize;

        if (RT_FAILURE(rc))
            break;
    }
    err = 0;

fail1:
    kfree(mask);

fail0:
    return err;
}
Beispiel #21
0
/**
 * This is called when vfs failed to locate dentry in the cache. The
 * job of this function is to allocate inode and link it to dentry.
 * [dentry] contains the name to be looked in the [parent] directory.
 * Failure to locate the name is not a "hard" error, in this case NULL
 * inode is added to [dentry] and vfs should proceed trying to create
 * the entry via other means. NULL(or "positive" pointer) ought to be
 * returned in case of success and "negative" pointer on error
 */
static struct dentry *sf_lookup(struct inode *parent, struct dentry *dentry
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
                                , unsigned int flags
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
                                , struct nameidata *nd
#endif
                               )
{
    int err;
    struct sf_inode_info *sf_i, *sf_new_i;
    struct sf_glob_info *sf_g;
    SHFLSTRING *path;
    struct inode *inode;
    ino_t ino;
    SHFLFSOBJINFO fsinfo;

    TRACE();
    sf_g = GET_GLOB_INFO(parent->i_sb);
    sf_i = GET_INODE_INFO(parent);

    BUG_ON(!sf_g);
    BUG_ON(!sf_i);

    err = sf_path_from_dentry(__func__, sf_g, sf_i, dentry, &path);
    if (err)
        goto fail0;

    err = sf_stat(__func__, sf_g, path, &fsinfo, 1);
    if (err)
    {
        if (err == -ENOENT)
        {
            /* -ENOENT: add NULL inode to dentry so it later can be
               created via call to create/mkdir/open */
            kfree(path);
            inode = NULL;
        }
        else
            goto fail1;
    }
    else
    {
        sf_new_i = kmalloc(sizeof(*sf_new_i), GFP_KERNEL);
        if (!sf_new_i)
        {
            LogRelFunc(("could not allocate memory for new inode info\n"));
            err = -ENOMEM;
            goto fail1;
        }
        sf_new_i->handle = SHFL_HANDLE_NIL;
        sf_new_i->force_reread = 0;

        ino = iunique(parent->i_sb, 1);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
        inode = iget_locked(parent->i_sb, ino);
#else
        inode = iget(parent->i_sb, ino);
#endif
        if (!inode)
        {
            LogFunc(("iget failed\n"));
            err = -ENOMEM;          /* XXX: ??? */
            goto fail2;
        }

        SET_INODE_INFO(inode, sf_new_i);
        sf_init_inode(sf_g, inode, &fsinfo);
        sf_new_i->path = path;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
        unlock_new_inode(inode);
#endif
    }

    sf_i->force_restat = 0;
    dentry->d_time = jiffies;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 38)
    d_set_d_op(dentry, &sf_dentry_ops);
#else
    dentry->d_op = &sf_dentry_ops;
#endif
    d_add(dentry, inode);
    return NULL;

fail2:
    kfree(sf_new_i);

fail1:
    kfree(path);

fail0:
    return ERR_PTR(err);
}
Beispiel #22
0
    /* filemap_write_and_wait(inode->i_mapping); */
    if (   inode->i_mapping->nrpages
        && filemap_fdatawrite(inode->i_mapping) != -EIO)
        filemap_fdatawait(inode->i_mapping);
#endif
    rc = vboxCallClose(&client_handle, &sf_g->map, sf_r->handle);
    if (RT_FAILURE(rc))
        LogFunc(("vboxCallClose failed rc=%Rrc\n", rc));

    kfree(sf_r);
    sf_i->file = NULL;
    sf_i->handle = SHFL_HANDLE_NIL;
    file->private_data = NULL;
    return 0;
}

#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
static int sf_reg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
static struct page *sf_reg_nopage(struct vm_area_struct *vma, unsigned long vaddr, int *type)
# define SET_TYPE(t) *type = (t)
#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0) */
static struct page *sf_reg_nopage(struct vm_area_struct *vma, unsigned long vaddr, int unused)
# define SET_TYPE(t)
#endif
{
    struct page *page;
    char *buf;
    loff_t off;
    uint32_t nread = PAGE_SIZE;
    int err;
    struct file *file = vma->vm_file;
    struct inode *inode = GET_F_DENTRY(file)->d_inode;
    struct sf_glob_info *sf_g = GET_GLOB_INFO(inode->i_sb);
    struct sf_reg_info *sf_r = file->private_data;

    TRACE();
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
    if (vmf->pgoff > vma->vm_end)
        return VM_FAULT_SIGBUS;
#else
    if (vaddr > vma->vm_end)
    {
        SET_TYPE(VM_FAULT_SIGBUS);
        return NOPAGE_SIGBUS;
    }
#endif

    /* Don't use GFP_HIGHUSER as long as sf_reg_read_aux() calls vboxCallRead()
     * which works on virtual addresses. On Linux cannot reliably determine the
     * physical address for high memory, see rtR0MemObjNativeLockKernel(). */
    page = alloc_page(GFP_USER);
    if (!page) {
        LogRelFunc(("failed to allocate page\n"));
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
        return VM_FAULT_OOM;
#else
        SET_TYPE(VM_FAULT_OOM);
        return NOPAGE_OOM;
#endif
    }

    buf = kmap(page);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
    off = (vmf->pgoff << PAGE_SHIFT);
#else
    off = (vaddr - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
#endif
    err = sf_reg_read_aux(__func__, sf_g, sf_r, buf, &nread, off);
    if (err)
    {
        kunmap(page);
        put_page(page);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
        return VM_FAULT_SIGBUS;
#else
        SET_TYPE(VM_FAULT_SIGBUS);
        return NOPAGE_SIGBUS;
#endif
    }

    BUG_ON (nread > PAGE_SIZE);
    if (!nread)
    {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
        clear_user_page(page_address(page), vmf->pgoff, page);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
        clear_user_page(page_address(page), vaddr, page);
#else
        clear_user_page(page_address(page), vaddr);
#endif
    }
    else
        memset(buf + nread, 0, PAGE_SIZE - nread);

    flush_dcache_page(page);
    kunmap(page);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
    vmf->page = page;
    return 0;
#else
    SET_TYPE(VM_FAULT_MAJOR);
    return page;
#endif
}
Beispiel #23
0
/* allocate global info, try to map host share */
static int sf_glob_alloc(struct vbsf_mount_info_new *info, struct sf_glob_info **sf_gp)
{
    int err, rc;
    SHFLSTRING *str_name;
    size_t name_len, str_len;
    struct sf_glob_info *sf_g;

    TRACE();
    sf_g = kmalloc(sizeof(*sf_g), GFP_KERNEL);
    if (!sf_g)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for global info\n"));
        goto fail0;
    }

    RT_ZERO(*sf_g);

    if (   info->nullchar     != '\0'
        || info->signature[0] != VBSF_MOUNT_SIGNATURE_BYTE_0
        || info->signature[1] != VBSF_MOUNT_SIGNATURE_BYTE_1
        || info->signature[2] != VBSF_MOUNT_SIGNATURE_BYTE_2)
    {
        /* An old version of mount.vboxsf made the syscall. Translate the
         * old parameters to the new structure. */
        struct vbsf_mount_info_old *info_old = (struct vbsf_mount_info_old *)info;
        static struct vbsf_mount_info_new info_compat;

        info = &info_compat;
        memset(info, 0, sizeof(*info));
        memcpy(&info->name, &info_old->name, MAX_HOST_NAME);
        memcpy(&info->nls_name, &info_old->nls_name, MAX_NLS_NAME);
        info->length = offsetof(struct vbsf_mount_info_new, dmode);
        info->uid    = info_old->uid;
        info->gid    = info_old->gid;
        info->ttl    = info_old->ttl;
    }

    info->name[sizeof(info->name) - 1] = 0;
    info->nls_name[sizeof(info->nls_name) - 1] = 0;

    name_len = strlen(info->name);
    if (name_len > 0xfffe)
    {
        err = -ENAMETOOLONG;
        LogFunc(("map name too big\n"));
        goto fail1;
    }

    str_len = offsetof(SHFLSTRING, String.utf8) + name_len + 1;
    str_name = kmalloc(str_len, GFP_KERNEL);
    if (!str_name)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for host name\n"));
        goto fail1;
    }

    str_name->u16Length = name_len;
    str_name->u16Size = name_len + 1;
    memcpy(str_name->String.utf8, info->name, name_len + 1);

#define _IS_UTF8(_str) \
    (strcmp(_str, "utf8") == 0)
#define _IS_EMPTY(_str) \
    (strcmp(_str, "") == 0)

    /* Check if NLS charset is valid and not points to UTF8 table */
    if (info->nls_name[0])
    {
        if (_IS_UTF8(info->nls_name))
            sf_g->nls = NULL;
        else
        {
            sf_g->nls = load_nls(info->nls_name);
            if (!sf_g->nls)
            {
                err = -EINVAL;
                LogFunc(("failed to load nls %s\n", info->nls_name));
                goto fail1;
            }
        }
    }
    else
    {
#ifdef CONFIG_NLS_DEFAULT
        /* If no NLS charset specified, try to load the default
         * one if it's not points to UTF8. */
        if (!_IS_UTF8(CONFIG_NLS_DEFAULT) && !_IS_EMPTY(CONFIG_NLS_DEFAULT))
            sf_g->nls = load_nls_default();
        else
            sf_g->nls = NULL;
#else
        sf_g->nls = NULL;
#endif

#undef _IS_UTF8
#undef _IS_EMPTY
    }

    rc = VbglR0SfMapFolder(&client_handle, str_name, &sf_g->map);
    kfree(str_name);

    if (RT_FAILURE(rc))
    {
        err = -EPROTO;
        LogFunc(("VbglR0SfMapFolder failed rc=%d\n", rc));
        goto fail2;
    }

    sf_g->ttl = info->ttl;
    sf_g->uid = info->uid;
    sf_g->gid = info->gid;

    if ((unsigned)info->length >= sizeof(struct vbsf_mount_info_new))
    {
        /* new fields */
        sf_g->dmode = info->dmode;
        sf_g->fmode = info->fmode;
        sf_g->dmask = info->dmask;
        sf_g->fmask = info->fmask;
    }
    else
    {
        sf_g->dmode = ~0;
        sf_g->fmode = ~0;
    }

    *sf_gp = sf_g;
    return 0;

fail2:
    if (sf_g->nls)
        unload_nls(sf_g->nls);

fail1:
    kfree(sf_g);

fail0:
    return err;
}