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;
}
/**
* 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;
}
/**
* 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"));
}
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;
}
/**
* 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;
}
/**
* 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;
}
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;
}
/**
* 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;
}
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;
}
/**
* 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, ¶ms);
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;
}
/* 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;
}
/* 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;
}
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();
}
/**
* 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, ¶ms);
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;
}
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;
}
/**
* 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);
}
/* 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
}
/* 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;
}
