/**
* Get information about host VFS object.
*
* @param mp Mount point data
* @param pSHFLDPath Path to VFS object within mounted shared folder
* @param Info Returned info
*
* @return 0 on success, error code otherwise.
*/
int
vboxvfs_get_info_internal(mount_t mp, PSHFLSTRING pSHFLDPath, PSHFLFSOBJINFO Info)
{
vboxvfs_mount_t *pMount;
SHFLCREATEPARMS parms;
int rc;
AssertReturn(mp, EINVAL);
AssertReturn(pSHFLDPath, EINVAL);
AssertReturn(Info, EINVAL);
pMount = (vboxvfs_mount_t *)vfs_fsprivate(mp);
AssertReturn(pMount, EINVAL);
parms.Handle = 0;
parms.Info.cbObject = 0;
parms.CreateFlags = SHFL_CF_LOOKUP | SHFL_CF_ACT_FAIL_IF_NEW;
rc = VbglR0SfCreate(&g_vboxSFClient, &pMount->pMap, pSHFLDPath, &parms);
if (rc == 0)
*Info = parms.Info;
return rc;
}
/**
* Open existing VBoxVFS object and return its handle.
*
* @param pMount Mount session data.
* @param pPath VFS path to the object relative to mount point.
* @param fFlags For directory object it should be
* SHFL_CF_DIRECTORY and 0 for any other object.
* @param pHandle Returned handle.
*
* @return 0 on success, error code otherwise.
*/
int
vboxvfs_open_internal(vboxvfs_mount_t *pMount, PSHFLSTRING pPath, uint32_t fFlags, SHFLHANDLE *pHandle)
{
SHFLCREATEPARMS parms;
int rc;
AssertReturn(pMount, EINVAL);
AssertReturn(pPath, EINVAL);
AssertReturn(pHandle, EINVAL);
bzero(&parms, sizeof(parms));
vboxvfs_g2h_mode_dump_inernal(fFlags);
parms.Handle = SHFL_HANDLE_NIL;
parms.Info.cbObject = 0;
parms.CreateFlags = fFlags;
rc = VbglR0SfCreate(&g_vboxSFClient, &pMount->pMap, pPath, &parms);
if (RT_SUCCESS(rc))
{
*pHandle = parms.Handle;
}
else
{
PDEBUG("vboxvfs_open_internal() failed: %d", rc);
}
return rc;
}
int sf_stat(const char *caller, struct sf_glob_info *sf_g,
SHFLSTRING *path, PSHFLFSOBJINFO result, int ok_to_fail)
{
int rc;
SHFLCREATEPARMS params;
NOREF(caller);
TRACE();
RT_ZERO(params);
params.Handle = SHFL_HANDLE_NIL;
params.CreateFlags = SHFL_CF_LOOKUP | SHFL_CF_ACT_FAIL_IF_NEW;
LogFunc(("sf_stat: calling VbglR0SfCreate, file %s, flags %#x\n",
path->String.utf8, params.CreateFlags));
rc = VbglR0SfCreate(&client_handle, &sf_g->map, path, ¶ms);
if (rc == VERR_INVALID_NAME)
{
/* this can happen for names like 'foo*' on a Windows host */
return -ENOENT;
}
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfCreate(%s) failed. caller=%s, rc=%Rrc\n",
path->String.utf8, rc, caller));
return -EPROTO;
}
if (params.Result != SHFL_FILE_EXISTS)
{
if (!ok_to_fail)
LogFunc(("VbglR0SfCreate(%s) file does not exist. caller=%s, result=%d\n",
path->String.utf8, params.Result, caller));
return -ENOENT;
}
*result = params.Info;
return 0;
}
int sf_setattr(struct dentry *dentry, struct iattr *iattr)
{
struct sf_glob_info *sf_g;
struct sf_inode_info *sf_i;
SHFLCREATEPARMS params;
SHFLFSOBJINFO info;
uint32_t cbBuffer;
int rc, err;
TRACE();
sf_g = GET_GLOB_INFO(dentry->d_inode->i_sb);
sf_i = GET_INODE_INFO(dentry->d_inode);
err = 0;
RT_ZERO(params);
params.Handle = SHFL_HANDLE_NIL;
params.CreateFlags = SHFL_CF_ACT_OPEN_IF_EXISTS
| SHFL_CF_ACT_FAIL_IF_NEW
| SHFL_CF_ACCESS_ATTR_WRITE;
/* this is at least required for Posix hosts */
if (iattr->ia_valid & ATTR_SIZE)
params.CreateFlags |= SHFL_CF_ACCESS_WRITE;
rc = VbglR0SfCreate(&client_handle, &sf_g->map, sf_i->path, ¶ms);
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfCreate(%s) failed rc=%Rrc\n",
sf_i->path->String.utf8, rc));
err = -RTErrConvertToErrno(rc);
goto fail2;
}
if (params.Result != SHFL_FILE_EXISTS)
{
LogFunc(("file %s does not exist\n", sf_i->path->String.utf8));
err = -ENOENT;
goto fail1;
}
/* Setting the file size and setting the other attributes has to be
* handled separately, see implementation of vbsfSetFSInfo() in
* vbsf.cpp */
if (iattr->ia_valid & (ATTR_MODE | ATTR_ATIME | ATTR_MTIME))
{
#define mode_set(r) ((iattr->ia_mode & (S_##r)) ? RTFS_UNIX_##r : 0)
RT_ZERO(info);
if (iattr->ia_valid & ATTR_MODE)
{
info.Attr.fMode = mode_set(ISUID);
info.Attr.fMode |= mode_set(ISGID);
info.Attr.fMode |= mode_set(IRUSR);
info.Attr.fMode |= mode_set(IWUSR);
info.Attr.fMode |= mode_set(IXUSR);
info.Attr.fMode |= mode_set(IRGRP);
info.Attr.fMode |= mode_set(IWGRP);
info.Attr.fMode |= mode_set(IXGRP);
info.Attr.fMode |= mode_set(IROTH);
info.Attr.fMode |= mode_set(IWOTH);
info.Attr.fMode |= mode_set(IXOTH);
if (iattr->ia_mode & S_IFDIR)
info.Attr.fMode |= RTFS_TYPE_DIRECTORY;
else
info.Attr.fMode |= RTFS_TYPE_FILE;
}
if (iattr->ia_valid & ATTR_ATIME)
sf_timespec_from_ftime(&info.AccessTime, &iattr->ia_atime);
if (iattr->ia_valid & ATTR_MTIME)
sf_timespec_from_ftime(&info.ModificationTime, &iattr->ia_mtime);
/* ignore ctime (inode change time) as it can't be set from userland anyway */
cbBuffer = sizeof(info);
rc = VbglR0SfFsInfo(&client_handle, &sf_g->map, params.Handle,
SHFL_INFO_SET | SHFL_INFO_FILE, &cbBuffer,
(PSHFLDIRINFO)&info);
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfFsInfo(%s, FILE) failed rc=%Rrc\n",
sf_i->path->String.utf8, rc));
err = -RTErrConvertToErrno(rc);
goto fail1;
}
}
if (iattr->ia_valid & ATTR_SIZE)
{
RT_ZERO(info);
info.cbObject = iattr->ia_size;
cbBuffer = sizeof(info);
rc = VbglR0SfFsInfo(&client_handle, &sf_g->map, params.Handle,
SHFL_INFO_SET | SHFL_INFO_SIZE, &cbBuffer,
(PSHFLDIRINFO)&info);
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfFsInfo(%s, SIZE) failed rc=%Rrc\n",
sf_i->path->String.utf8, rc));
err = -RTErrConvertToErrno(rc);
goto fail1;
}
}
rc = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("VbglR0SfClose(%s) failed rc=%Rrc\n", sf_i->path->String.utf8, rc));
return sf_inode_revalidate(dentry);
fail1:
rc = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("VbglR0SfClose(%s) failed rc=%Rrc\n", sf_i->path->String.utf8, rc));
fail2:
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 VbglR0SfCreate, file %s, flags=%#x, %#x\n",
sf_i->path->String.utf8 , file->f_flags, params.CreateFlags));
rc = VbglR0SfCreate(&client_handle, &sf_g->map, sf_i->path, ¶ms);
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfCreate 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;
}
/**
* Create a new regular file / directory.
*
* @param parent inode of the directory
* @param dentry directory cache entry
* @param mode file mode
* @param fDirectory true if directory, false otherwise
* @returns 0 on success, Linux error code otherwise
*/
static int sf_create_aux(struct inode *parent, struct dentry *dentry,
umode_t mode, int fDirectory)
{
int rc, err;
SHFLCREATEPARMS params;
SHFLSTRING *path;
struct sf_inode_info *sf_i = GET_INODE_INFO(parent);
struct sf_glob_info *sf_g = GET_GLOB_INFO(parent->i_sb);
TRACE();
BUG_ON(!sf_i);
BUG_ON(!sf_g);
err = sf_path_from_dentry(__func__, sf_g, sf_i, dentry, &path);
if (err)
goto fail0;
RT_ZERO(params);
params.Handle = SHFL_HANDLE_NIL;
params.CreateFlags = 0
| SHFL_CF_ACT_CREATE_IF_NEW
| SHFL_CF_ACT_FAIL_IF_EXISTS
| SHFL_CF_ACCESS_READWRITE
| (fDirectory ? SHFL_CF_DIRECTORY : 0)
;
params.Info.Attr.fMode = 0
| (fDirectory ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE)
| (mode & S_IRWXUGO)
;
params.Info.Attr.enmAdditional = RTFSOBJATTRADD_NOTHING;
LogFunc(("sf_create_aux: calling VbglR0SfCreate, folder %s, flags %#x\n",
path->String.utf8, params.CreateFlags));
rc = VbglR0SfCreate(&client_handle, &sf_g->map, path, ¶ms);
if (RT_FAILURE(rc))
{
if (rc == VERR_WRITE_PROTECT)
{
err = -EROFS;
goto fail1;
}
err = -EPROTO;
LogFunc(("(%d): VbglR0SfCreate(%s) failed rc=%Rrc\n",
fDirectory, sf_i->path->String.utf8, rc));
goto fail1;
}
if (params.Result != SHFL_FILE_CREATED)
{
err = -EPERM;
LogFunc(("(%d): could not create file %s result=%d\n",
fDirectory, sf_i->path->String.utf8, params.Result));
goto fail1;
}
err = sf_instantiate(parent, dentry, path, ¶ms.Info,
fDirectory ? SHFL_HANDLE_NIL : params.Handle);
if (err)
{
LogFunc(("(%d): could not instantiate dentry for %s err=%d\n",
fDirectory, sf_i->path->String.utf8, err));
goto fail2;
}
/*
* Don't close this handle right now. We assume that the same file is
* opened with sf_reg_open() and later closed with sf_reg_close(). Save
* the handle in between. Does not apply to directories. True?
*/
if (fDirectory)
{
rc = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("(%d): VbglR0SfClose failed rc=%Rrc\n", fDirectory, rc));
}
sf_i->force_restat = 1;
return 0;
fail2:
rc = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("(%d): VbglR0SfClose failed rc=%Rrc\n", fDirectory, rc));
fail1:
kfree(path);
fail0:
return err;
}
/**
* 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 VbglR0SfCreate, folder %s, flags %#x\n",
sf_i->path->String.utf8, params.CreateFlags));
rc = VbglR0SfCreate(&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 = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("sf_dir_open(): VbglR0SfClose(%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;
}
/**
* Extract element ([dir]->f_pos) from the directory [dir] into [d_name].
*
* @returns 0 for success, 1 for end reached, Linux error code otherwise.
*/
static int sf_getdent(struct file *dir, char d_name[NAME_MAX], int *d_type)
{
loff_t cur;
struct sf_glob_info *sf_g;
struct sf_dir_info *sf_d;
struct sf_inode_info *sf_i;
struct inode *inode;
struct list_head *pos, *list;
TRACE();
inode = GET_F_DENTRY(dir)->d_inode;
sf_i = GET_INODE_INFO(inode);
sf_g = GET_GLOB_INFO(inode->i_sb);
sf_d = dir->private_data;
BUG_ON(!sf_g);
BUG_ON(!sf_d);
BUG_ON(!sf_i);
if (sf_i->force_reread)
{
int rc;
int err;
SHFLCREATEPARMS params;
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_getdent: calling VbglR0SfCreate, folder %s, flags %#x\n",
sf_i->path->String.utf8, params.CreateFlags));
rc = VbglR0SfCreate(&client_handle, &sf_g->map, sf_i->path, ¶ms);
if (RT_FAILURE(rc))
{
LogFunc(("VbglR0SfCreate(%s) failed rc=%Rrc\n",
sf_i->path->String.utf8, rc));
return -EPERM;
}
if (params.Result != SHFL_FILE_EXISTS)
{
LogFunc(("directory %s does not exist\n", sf_i->path->String.utf8));
sf_dir_info_free(sf_d);
return -ENOENT;
}
sf_dir_info_empty(sf_d);
err = sf_dir_read_all(sf_g, sf_i, sf_d, params.Handle);
rc = VbglR0SfClose(&client_handle, &sf_g->map, params.Handle);
if (RT_FAILURE(rc))
LogFunc(("VbglR0SfClose(%s) failed rc=%Rrc\n", sf_i->path->String.utf8, rc));
if (err)
return err;
sf_i->force_reread = 0;
}
cur = 0;
list = &sf_d->info_list;
list_for_each(pos, list)
{
struct sf_dir_buf *b;
SHFLDIRINFO *info;
loff_t i;
b = list_entry(pos, struct sf_dir_buf, head);
if (dir->f_pos >= cur + b->cEntries)
{
cur += b->cEntries;
continue;
}
for (i = 0, info = b->buf; i < dir->f_pos - cur; ++i)
{
size_t size;
size = offsetof(SHFLDIRINFO, name.String) + info->name.u16Size;
info = (SHFLDIRINFO *) ((uintptr_t) info + size);
}
*d_type = sf_get_d_type(info->Info.Attr.fMode);
return sf_nlscpy(sf_g, d_name, NAME_MAX,
info->name.String.utf8, info->name.u16Length);
}
return 1;
}