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-rw-r--r--fs/vboxsf/vboxsf_wrappers.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/fs/vboxsf/vboxsf_wrappers.c b/fs/vboxsf/vboxsf_wrappers.c
new file mode 100644
index 000000000..bfc78a097
--- /dev/null
+++ b/fs/vboxsf/vboxsf_wrappers.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Wrapper functions for the shfl host calls.
+ *
+ * Copyright (C) 2006-2018 Oracle Corporation
+ */
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vbox_err.h>
+#include <linux/vbox_utils.h>
+#include "vfsmod.h"
+
+#define SHFL_REQUEST \
+ (VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV_OTHER | \
+ VMMDEV_REQUESTOR_CON_DONT_KNOW | VMMDEV_REQUESTOR_TRUST_NOT_GIVEN)
+
+static u32 vboxsf_client_id;
+
+int vboxsf_connect(void)
+{
+ struct vbg_dev *gdev;
+ struct vmmdev_hgcm_service_location loc;
+ int err, vbox_status;
+
+ loc.type = VMMDEV_HGCM_LOC_LOCALHOST_EXISTING;
+ strcpy(loc.u.localhost.service_name, "VBoxSharedFolders");
+
+ gdev = vbg_get_gdev();
+ if (IS_ERR(gdev))
+ return -ENODEV; /* No guest-device */
+
+ err = vbg_hgcm_connect(gdev, SHFL_REQUEST, &loc,
+ &vboxsf_client_id, &vbox_status);
+ vbg_put_gdev(gdev);
+
+ return err ? err : vbg_status_code_to_errno(vbox_status);
+}
+
+void vboxsf_disconnect(void)
+{
+ struct vbg_dev *gdev;
+ int vbox_status;
+
+ gdev = vbg_get_gdev();
+ if (IS_ERR(gdev))
+ return; /* guest-device is gone, already disconnected */
+
+ vbg_hgcm_disconnect(gdev, SHFL_REQUEST, vboxsf_client_id, &vbox_status);
+ vbg_put_gdev(gdev);
+}
+
+static int vboxsf_call(u32 function, void *parms, u32 parm_count, int *status)
+{
+ struct vbg_dev *gdev;
+ int err, vbox_status;
+
+ gdev = vbg_get_gdev();
+ if (IS_ERR(gdev))
+ return -ESHUTDOWN; /* guest-dev removed underneath us */
+
+ err = vbg_hgcm_call(gdev, SHFL_REQUEST, vboxsf_client_id, function,
+ U32_MAX, parms, parm_count, &vbox_status);
+ vbg_put_gdev(gdev);
+
+ if (err < 0)
+ return err;
+
+ if (status)
+ *status = vbox_status;
+
+ return vbg_status_code_to_errno(vbox_status);
+}
+
+int vboxsf_map_folder(struct shfl_string *folder_name, u32 *root)
+{
+ struct shfl_map_folder parms;
+ int err, status;
+
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL;
+ parms.path.u.pointer.size = shfl_string_buf_size(folder_name);
+ parms.path.u.pointer.u.linear_addr = (uintptr_t)folder_name;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = 0;
+
+ parms.delimiter.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.delimiter.u.value32 = '/';
+
+ parms.case_sensitive.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.case_sensitive.u.value32 = 1;
+
+ err = vboxsf_call(SHFL_FN_MAP_FOLDER, &parms, SHFL_CPARMS_MAP_FOLDER,
+ &status);
+ if (err == -ENOSYS && status == VERR_NOT_IMPLEMENTED)
+ vbg_err("%s: Error host is too old\n", __func__);
+
+ *root = parms.root.u.value32;
+ return err;
+}
+
+int vboxsf_unmap_folder(u32 root)
+{
+ struct shfl_unmap_folder parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ return vboxsf_call(SHFL_FN_UNMAP_FOLDER, &parms,
+ SHFL_CPARMS_UNMAP_FOLDER, NULL);
+}
+
+/**
+ * vboxsf_create - Create a new file or folder
+ * @root: Root of the shared folder in which to create the file
+ * @parsed_path: The path of the file or folder relative to the shared folder
+ * @param: create_parms Parameters for file/folder creation.
+ *
+ * Create a new file or folder or open an existing one in a shared folder.
+ * Note this function always returns 0 / success unless an exceptional condition
+ * occurs - out of memory, invalid arguments, etc. If the file or folder could
+ * not be opened or created, create_parms->handle will be set to
+ * SHFL_HANDLE_NIL on return. In this case the value in create_parms->result
+ * provides information as to why (e.g. SHFL_FILE_EXISTS), create_parms->result
+ * is also set on success as additional information.
+ *
+ * Returns:
+ * 0 or negative errno value.
+ */
+int vboxsf_create(u32 root, struct shfl_string *parsed_path,
+ struct shfl_createparms *create_parms)
+{
+ struct shfl_create parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL;
+ parms.path.u.pointer.size = shfl_string_buf_size(parsed_path);
+ parms.path.u.pointer.u.linear_addr = (uintptr_t)parsed_path;
+
+ parms.parms.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL;
+ parms.parms.u.pointer.size = sizeof(struct shfl_createparms);
+ parms.parms.u.pointer.u.linear_addr = (uintptr_t)create_parms;
+
+ return vboxsf_call(SHFL_FN_CREATE, &parms, SHFL_CPARMS_CREATE, NULL);
+}
+
+int vboxsf_close(u32 root, u64 handle)
+{
+ struct shfl_close parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.handle.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.handle.u.value64 = handle;
+
+ return vboxsf_call(SHFL_FN_CLOSE, &parms, SHFL_CPARMS_CLOSE, NULL);
+}
+
+int vboxsf_remove(u32 root, struct shfl_string *parsed_path, u32 flags)
+{
+ struct shfl_remove parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.path.u.pointer.size = shfl_string_buf_size(parsed_path);
+ parms.path.u.pointer.u.linear_addr = (uintptr_t)parsed_path;
+
+ parms.flags.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.flags.u.value32 = flags;
+
+ return vboxsf_call(SHFL_FN_REMOVE, &parms, SHFL_CPARMS_REMOVE, NULL);
+}
+
+int vboxsf_rename(u32 root, struct shfl_string *src_path,
+ struct shfl_string *dest_path, u32 flags)
+{
+ struct shfl_rename parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.src.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.src.u.pointer.size = shfl_string_buf_size(src_path);
+ parms.src.u.pointer.u.linear_addr = (uintptr_t)src_path;
+
+ parms.dest.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.dest.u.pointer.size = shfl_string_buf_size(dest_path);
+ parms.dest.u.pointer.u.linear_addr = (uintptr_t)dest_path;
+
+ parms.flags.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.flags.u.value32 = flags;
+
+ return vboxsf_call(SHFL_FN_RENAME, &parms, SHFL_CPARMS_RENAME, NULL);
+}
+
+int vboxsf_read(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf)
+{
+ struct shfl_read parms;
+ int err;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.handle.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.handle.u.value64 = handle;
+ parms.offset.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.offset.u.value64 = offset;
+ parms.cb.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.cb.u.value32 = *buf_len;
+ parms.buffer.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT;
+ parms.buffer.u.pointer.size = *buf_len;
+ parms.buffer.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ err = vboxsf_call(SHFL_FN_READ, &parms, SHFL_CPARMS_READ, NULL);
+
+ *buf_len = parms.cb.u.value32;
+ return err;
+}
+
+int vboxsf_write(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf)
+{
+ struct shfl_write parms;
+ int err;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.handle.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.handle.u.value64 = handle;
+ parms.offset.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.offset.u.value64 = offset;
+ parms.cb.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.cb.u.value32 = *buf_len;
+ parms.buffer.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.buffer.u.pointer.size = *buf_len;
+ parms.buffer.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ err = vboxsf_call(SHFL_FN_WRITE, &parms, SHFL_CPARMS_WRITE, NULL);
+
+ *buf_len = parms.cb.u.value32;
+ return err;
+}
+
+/* Returns 0 on success, 1 on end-of-dir, negative errno otherwise */
+int vboxsf_dirinfo(u32 root, u64 handle,
+ struct shfl_string *parsed_path, u32 flags, u32 index,
+ u32 *buf_len, struct shfl_dirinfo *buf, u32 *file_count)
+{
+ struct shfl_list parms;
+ int err, status;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.handle.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.handle.u.value64 = handle;
+ parms.flags.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.flags.u.value32 = flags;
+ parms.cb.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.cb.u.value32 = *buf_len;
+ if (parsed_path) {
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.path.u.pointer.size = shfl_string_buf_size(parsed_path);
+ parms.path.u.pointer.u.linear_addr = (uintptr_t)parsed_path;
+ } else {
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_IN;
+ parms.path.u.pointer.size = 0;
+ parms.path.u.pointer.u.linear_addr = 0;
+ }
+
+ parms.buffer.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT;
+ parms.buffer.u.pointer.size = *buf_len;
+ parms.buffer.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ parms.resume_point.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.resume_point.u.value32 = index;
+ parms.file_count.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.file_count.u.value32 = 0; /* out parameter only */
+
+ err = vboxsf_call(SHFL_FN_LIST, &parms, SHFL_CPARMS_LIST, &status);
+ if (err == -ENODATA && status == VERR_NO_MORE_FILES)
+ err = 1;
+
+ *buf_len = parms.cb.u.value32;
+ *file_count = parms.file_count.u.value32;
+ return err;
+}
+
+int vboxsf_fsinfo(u32 root, u64 handle, u32 flags,
+ u32 *buf_len, void *buf)
+{
+ struct shfl_information parms;
+ int err;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.handle.type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parms.handle.u.value64 = handle;
+ parms.flags.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.flags.u.value32 = flags;
+ parms.cb.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.cb.u.value32 = *buf_len;
+ parms.info.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL;
+ parms.info.u.pointer.size = *buf_len;
+ parms.info.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ err = vboxsf_call(SHFL_FN_INFORMATION, &parms, SHFL_CPARMS_INFORMATION,
+ NULL);
+
+ *buf_len = parms.cb.u.value32;
+ return err;
+}
+
+int vboxsf_readlink(u32 root, struct shfl_string *parsed_path,
+ u32 buf_len, u8 *buf)
+{
+ struct shfl_readLink parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.path.u.pointer.size = shfl_string_buf_size(parsed_path);
+ parms.path.u.pointer.u.linear_addr = (uintptr_t)parsed_path;
+
+ parms.buffer.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT;
+ parms.buffer.u.pointer.size = buf_len;
+ parms.buffer.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ return vboxsf_call(SHFL_FN_READLINK, &parms, SHFL_CPARMS_READLINK,
+ NULL);
+}
+
+int vboxsf_symlink(u32 root, struct shfl_string *new_path,
+ struct shfl_string *old_path, struct shfl_fsobjinfo *buf)
+{
+ struct shfl_symlink parms;
+
+ parms.root.type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parms.root.u.value32 = root;
+
+ parms.new_path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.new_path.u.pointer.size = shfl_string_buf_size(new_path);
+ parms.new_path.u.pointer.u.linear_addr = (uintptr_t)new_path;
+
+ parms.old_path.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN;
+ parms.old_path.u.pointer.size = shfl_string_buf_size(old_path);
+ parms.old_path.u.pointer.u.linear_addr = (uintptr_t)old_path;
+
+ parms.info.type = VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT;
+ parms.info.u.pointer.size = sizeof(struct shfl_fsobjinfo);
+ parms.info.u.pointer.u.linear_addr = (uintptr_t)buf;
+
+ return vboxsf_call(SHFL_FN_SYMLINK, &parms, SHFL_CPARMS_SYMLINK, NULL);
+}
+
+int vboxsf_set_utf8(void)
+{
+ return vboxsf_call(SHFL_FN_SET_UTF8, NULL, 0, NULL);
+}
+
+int vboxsf_set_symlinks(void)
+{
+ return vboxsf_call(SHFL_FN_SET_SYMLINKS, NULL, 0, NULL);
+}