F: include/uapi/linux/vbox*.h
F: drivers/virt/vboxguest/
-VIRTUAL BOX SHARED FOLDER VFS DRIVER:
-M: Hans de Goede <hdegoede@redhat.com>
-L: linux-fsdevel@vger.kernel.org
-S: Maintained
-F: drivers/staging/vboxsf/*
-
VIRTUAL SERIO DEVICE DRIVER
M: Stephen Chandler Paul <thatslyude@gmail.com>
S: Maintained
source "drivers/staging/qlge/Kconfig"
-source "drivers/staging/vboxsf/Kconfig"
-
endif # STAGING
obj-$(CONFIG_USB_WUSB) += wusbcore/
obj-$(CONFIG_EXFAT_FS) += exfat/
obj-$(CONFIG_QLGE) += qlge/
-obj-$(CONFIG_VBOXSF_FS) += vboxsf/
+++ /dev/null
-config VBOXSF_FS
- tristate "VirtualBox guest shared folder (vboxsf) support"
- depends on X86 && VBOXGUEST
- select NLS
- help
- VirtualBox hosts can share folders with guests, this driver
- implements the Linux-guest side of this allowing folders exported
- by the host to be mounted under Linux.
-
- If you want to use shared folders in VirtualBox guests, answer Y or M.
+++ /dev/null
-# SPDX-License-Identifier: MIT
-
-obj-$(CONFIG_VBOXSF_FS) += vboxsf.o
-
-vboxsf-y := dir.o file.o utils.o vboxsf_wrappers.o super.o
+++ /dev/null
-TODO:
-- Find a file-system developer to review this and give their Reviewed-By
-- Address any items coming up during review
-- Move to fs/vboxfs
-
-Please send any patches to Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-and Hans de Goede <hdegoede@redhat.com>
+++ /dev/null
-// SPDX-License-Identifier: MIT
-/*
- * VirtualBox Guest Shared Folders support: Directory inode and file operations
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#include <linux/namei.h>
-#include <linux/vbox_utils.h>
-#include "vfsmod.h"
-
-static int vboxsf_dir_open(struct inode *inode, struct file *file)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(inode->i_sb);
- struct shfl_createparms params = {};
- struct vboxsf_dir_info *sf_d;
- int err;
-
- sf_d = vboxsf_dir_info_alloc();
- if (!sf_d)
- return -ENOMEM;
-
- params.handle = SHFL_HANDLE_NIL;
- params.create_flags = SHFL_CF_DIRECTORY | SHFL_CF_ACT_OPEN_IF_EXISTS |
- SHFL_CF_ACT_FAIL_IF_NEW | SHFL_CF_ACCESS_READ;
-
- err = vboxsf_create_at_dentry(file_dentry(file), ¶ms);
- if (err)
- goto err_free_dir_info;
-
- if (params.result != SHFL_FILE_EXISTS) {
- err = -ENOENT;
- goto err_close;
- }
-
- err = vboxsf_dir_read_all(sbi, sf_d, params.handle);
- if (err)
- goto err_close;
-
- vboxsf_close(sbi->root, params.handle);
- file->private_data = sf_d;
- return 0;
-
-err_close:
- vboxsf_close(sbi->root, params.handle);
-err_free_dir_info:
- vboxsf_dir_info_free(sf_d);
- return err;
-}
-
-static int vboxsf_dir_release(struct inode *inode, struct file *file)
-{
- if (file->private_data)
- vboxsf_dir_info_free(file->private_data);
-
- return 0;
-}
-
-static unsigned int vboxsf_get_d_type(u32 mode)
-{
- unsigned int d_type;
-
- switch (mode & SHFL_TYPE_MASK) {
- case SHFL_TYPE_FIFO:
- d_type = DT_FIFO;
- break;
- case SHFL_TYPE_DEV_CHAR:
- d_type = DT_CHR;
- break;
- case SHFL_TYPE_DIRECTORY:
- d_type = DT_DIR;
- break;
- case SHFL_TYPE_DEV_BLOCK:
- d_type = DT_BLK;
- break;
- case SHFL_TYPE_FILE:
- d_type = DT_REG;
- break;
- case SHFL_TYPE_SYMLINK:
- d_type = DT_LNK;
- break;
- case SHFL_TYPE_SOCKET:
- d_type = DT_SOCK;
- break;
- case SHFL_TYPE_WHITEOUT:
- d_type = DT_WHT;
- break;
- default:
- d_type = DT_UNKNOWN;
- break;
- }
- return d_type;
-}
-
-static bool vboxsf_dir_emit(struct file *dir, struct dir_context *ctx)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(file_inode(dir)->i_sb);
- struct vboxsf_dir_info *sf_d = dir->private_data;
- struct shfl_dirinfo *info;
- struct vboxsf_dir_buf *b;
- unsigned int d_type;
- loff_t i, cur = 0;
- ino_t fake_ino;
- size_t size;
- int err;
-
- list_for_each_entry(b, &sf_d->info_list, head) {
-try_next_entry:
- if (ctx->pos >= cur + b->entries) {
- cur += b->entries;
- continue;
- }
-
- /*
- * Note the vboxsf_dir_info objects we are iterating over here
- * are variable sized, so the info pointer may end up being
- * unaligned. This is how we get the data from the host.
- * Since vboxsf is only supported on x86 machines this is not
- * a problem.
- */
- for (i = 0, info = b->buf; i < ctx->pos - cur; i++) {
- size = offsetof(struct shfl_dirinfo, name.string) +
- info->name.size;
- info = (struct shfl_dirinfo *)((uintptr_t)info + size);
- }
-
- /* Info now points to the right entry, emit it. */
- d_type = vboxsf_get_d_type(info->info.attr.mode);
-
- /*
- * On 32 bit systems pos is 64 signed, while ino is 32 bit
- * unsigned so fake_ino may overflow, check for this.
- */
- if ((ino_t)(ctx->pos + 1) != (u64)(ctx->pos + 1)) {
- vbg_err("vboxsf: fake ino overflow, truncating dir\n");
- return false;
- }
- fake_ino = ctx->pos + 1;
-
- if (sbi->nls) {
- char d_name[NAME_MAX];
-
- err = vboxsf_nlscpy(sbi, d_name, NAME_MAX,
- info->name.string.utf8,
- info->name.length);
- if (err) {
- /* skip erroneous entry and proceed */
- ctx->pos += 1;
- goto try_next_entry;
- }
-
- return dir_emit(ctx, d_name, strlen(d_name),
- fake_ino, d_type);
- }
-
- return dir_emit(ctx, info->name.string.utf8, info->name.length,
- fake_ino, d_type);
- }
-
- return false;
-}
-
-static int vboxsf_dir_iterate(struct file *dir, struct dir_context *ctx)
-{
- bool keep_iterating;
-
- for (keep_iterating = true; keep_iterating; ctx->pos += 1)
- keep_iterating = vboxsf_dir_emit(dir, ctx);
-
- return 0;
-}
-
-const struct file_operations vboxsf_dir_fops = {
- .open = vboxsf_dir_open,
- .iterate = vboxsf_dir_iterate,
- .release = vboxsf_dir_release,
- .read = generic_read_dir,
- .llseek = generic_file_llseek,
-};
-
-/*
- * This is called during name resolution/lookup to check if the @dentry in
- * the cache is still valid. the job is handled by vboxsf_inode_revalidate.
- */
-static int vboxsf_dentry_revalidate(struct dentry *dentry, unsigned int flags)
-{
- if (flags & LOOKUP_RCU)
- return -ECHILD;
-
- if (d_really_is_positive(dentry))
- return vboxsf_inode_revalidate(dentry) == 0;
- else
- return vboxsf_stat_dentry(dentry, NULL) == -ENOENT;
-}
-
-const struct dentry_operations vboxsf_dentry_ops = {
- .d_revalidate = vboxsf_dentry_revalidate
-};
-
-/* iops */
-
-static struct dentry *vboxsf_dir_lookup(struct inode *parent,
- struct dentry *dentry,
- unsigned int flags)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
- struct shfl_fsobjinfo fsinfo;
- struct inode *inode;
- int err;
-
- dentry->d_time = jiffies;
-
- err = vboxsf_stat_dentry(dentry, &fsinfo);
- if (err) {
- inode = (err == -ENOENT) ? NULL : ERR_PTR(err);
- } else {
- inode = vboxsf_new_inode(parent->i_sb);
- if (!IS_ERR(inode))
- vboxsf_init_inode(sbi, inode, &fsinfo);
- }
-
- return d_splice_alias(inode, dentry);
-}
-
-static int vboxsf_dir_instantiate(struct inode *parent, struct dentry *dentry,
- struct shfl_fsobjinfo *info)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
- struct vboxsf_inode *sf_i;
- struct inode *inode;
-
- inode = vboxsf_new_inode(parent->i_sb);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- sf_i = VBOXSF_I(inode);
- /* The host may have given us different attr then requested */
- sf_i->force_restat = 1;
- vboxsf_init_inode(sbi, inode, info);
-
- d_instantiate(dentry, inode);
-
- return 0;
-}
-
-static int vboxsf_dir_create(struct inode *parent, struct dentry *dentry,
- umode_t mode, int is_dir)
-{
- struct vboxsf_inode *sf_parent_i = VBOXSF_I(parent);
- struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
- struct shfl_createparms params = {};
- int err;
-
- params.handle = SHFL_HANDLE_NIL;
- params.create_flags = SHFL_CF_ACT_CREATE_IF_NEW |
- SHFL_CF_ACT_FAIL_IF_EXISTS |
- SHFL_CF_ACCESS_READWRITE |
- (is_dir ? SHFL_CF_DIRECTORY : 0);
- params.info.attr.mode = (mode & 0777) |
- (is_dir ? SHFL_TYPE_DIRECTORY : SHFL_TYPE_FILE);
- params.info.attr.additional = SHFLFSOBJATTRADD_NOTHING;
-
- err = vboxsf_create_at_dentry(dentry, ¶ms);
- if (err)
- return err;
-
- if (params.result != SHFL_FILE_CREATED)
- return -EPERM;
-
- vboxsf_close(sbi->root, params.handle);
-
- err = vboxsf_dir_instantiate(parent, dentry, ¶ms.info);
- if (err)
- return err;
-
- /* parent directory access/change time changed */
- sf_parent_i->force_restat = 1;
-
- return 0;
-}
-
-static int vboxsf_dir_mkfile(struct inode *parent, struct dentry *dentry,
- umode_t mode, bool excl)
-{
- return vboxsf_dir_create(parent, dentry, mode, 0);
-}
-
-static int vboxsf_dir_mkdir(struct inode *parent, struct dentry *dentry,
- umode_t mode)
-{
- return vboxsf_dir_create(parent, dentry, mode, 1);
-}
-
-static int vboxsf_dir_unlink(struct inode *parent, struct dentry *dentry)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
- struct vboxsf_inode *sf_parent_i = VBOXSF_I(parent);
- struct inode *inode = d_inode(dentry);
- struct shfl_string *path;
- u32 flags;
- int err;
-
- if (S_ISDIR(inode->i_mode))
- flags = SHFL_REMOVE_DIR;
- else
- flags = SHFL_REMOVE_FILE;
-
- if (S_ISLNK(inode->i_mode))
- flags |= SHFL_REMOVE_SYMLINK;
-
- path = vboxsf_path_from_dentry(sbi, dentry);
- if (IS_ERR(path))
- return PTR_ERR(path);
-
- err = vboxsf_remove(sbi->root, path, flags);
- __putname(path);
- if (err)
- return err;
-
- /* parent directory access/change time changed */
- sf_parent_i->force_restat = 1;
-
- return 0;
-}
-
-static int vboxsf_dir_rename(struct inode *old_parent,
- struct dentry *old_dentry,
- struct inode *new_parent,
- struct dentry *new_dentry,
- unsigned int flags)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(old_parent->i_sb);
- struct vboxsf_inode *sf_old_parent_i = VBOXSF_I(old_parent);
- struct vboxsf_inode *sf_new_parent_i = VBOXSF_I(new_parent);
- u32 shfl_flags = SHFL_RENAME_FILE | SHFL_RENAME_REPLACE_IF_EXISTS;
- struct shfl_string *old_path, *new_path;
- int err;
-
- if (flags)
- return -EINVAL;
-
- old_path = vboxsf_path_from_dentry(sbi, old_dentry);
- if (IS_ERR(old_path))
- return PTR_ERR(old_path);
-
- new_path = vboxsf_path_from_dentry(sbi, new_dentry);
- if (IS_ERR(new_path)) {
- err = PTR_ERR(new_path);
- goto err_put_old_path;
- }
-
- if (d_inode(old_dentry)->i_mode & S_IFDIR)
- shfl_flags = 0;
-
- err = vboxsf_rename(sbi->root, old_path, new_path, shfl_flags);
- if (err == 0) {
- /* parent directories access/change time changed */
- sf_new_parent_i->force_restat = 1;
- sf_old_parent_i->force_restat = 1;
- }
-
- __putname(new_path);
-err_put_old_path:
- __putname(old_path);
- return err;
-}
-
-static int vboxsf_dir_symlink(struct inode *parent, struct dentry *dentry,
- const char *symname)
-{
- struct vboxsf_inode *sf_parent_i = VBOXSF_I(parent);
- struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
- int symname_size = strlen(symname) + 1;
- struct shfl_string *path, *ssymname;
- struct shfl_fsobjinfo info;
- int err;
-
- path = vboxsf_path_from_dentry(sbi, dentry);
- if (IS_ERR(path))
- return PTR_ERR(path);
-
- ssymname = kmalloc(SHFLSTRING_HEADER_SIZE + symname_size, GFP_KERNEL);
- if (!ssymname) {
- __putname(path);
- return -ENOMEM;
- }
- ssymname->length = symname_size - 1;
- ssymname->size = symname_size;
- memcpy(ssymname->string.utf8, symname, symname_size);
-
- err = vboxsf_symlink(sbi->root, path, ssymname, &info);
- kfree(ssymname);
- __putname(path);
- if (err) {
- /* -EROFS means symlinks are note support -> -EPERM */
- return (err == -EROFS) ? -EPERM : err;
- }
-
- err = vboxsf_dir_instantiate(parent, dentry, &info);
- if (err)
- return err;
-
- /* parent directory access/change time changed */
- sf_parent_i->force_restat = 1;
- return 0;
-}
-
-const struct inode_operations vboxsf_dir_iops = {
- .lookup = vboxsf_dir_lookup,
- .create = vboxsf_dir_mkfile,
- .mkdir = vboxsf_dir_mkdir,
- .rmdir = vboxsf_dir_unlink,
- .unlink = vboxsf_dir_unlink,
- .rename = vboxsf_dir_rename,
- .symlink = vboxsf_dir_symlink,
- .getattr = vboxsf_getattr,
- .setattr = vboxsf_setattr,
-};
+++ /dev/null
-// SPDX-License-Identifier: MIT
-/*
- * VirtualBox Guest Shared Folders support: Regular file inode and file ops.
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#include <linux/mm.h>
-#include <linux/page-flags.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/sizes.h>
-#include "vfsmod.h"
-
-struct vboxsf_handle {
- u64 handle;
- u32 root;
- u32 access_flags;
- struct kref refcount;
- struct list_head head;
-};
-
-static int vboxsf_file_open(struct inode *inode, struct file *file)
-{
- struct vboxsf_inode *sf_i = VBOXSF_I(inode);
- struct shfl_createparms params = {};
- struct vboxsf_handle *sf_handle;
- u32 access_flags = 0;
- int err;
-
- sf_handle = kmalloc(sizeof(*sf_handle), GFP_KERNEL);
- if (!sf_handle)
- return -ENOMEM;
-
- /*
- * 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 mode parameter.
- */
- params.handle = SHFL_HANDLE_NIL;
- if (file->f_flags & O_CREAT) {
- params.create_flags |= 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)
- params.create_flags |= SHFL_CF_ACT_OVERWRITE_IF_EXISTS;
- else
- params.create_flags |= SHFL_CF_ACT_OPEN_IF_EXISTS;
- } else {
- params.create_flags |= SHFL_CF_ACT_FAIL_IF_NEW;
- if (file->f_flags & O_TRUNC)
- params.create_flags |= SHFL_CF_ACT_OVERWRITE_IF_EXISTS;
- }
-
- switch (file->f_flags & O_ACCMODE) {
- case O_RDONLY:
- access_flags |= SHFL_CF_ACCESS_READ;
- break;
-
- case O_WRONLY:
- access_flags |= SHFL_CF_ACCESS_WRITE;
- break;
-
- case O_RDWR:
- access_flags |= SHFL_CF_ACCESS_READWRITE;
- break;
-
- default:
- WARN_ON(1);
- }
-
- if (file->f_flags & O_APPEND)
- access_flags |= SHFL_CF_ACCESS_APPEND;
-
- params.create_flags |= access_flags;
- params.info.attr.mode = inode->i_mode;
-
- err = vboxsf_create_at_dentry(file_dentry(file), ¶ms);
- if (err == 0 && params.handle == SHFL_HANDLE_NIL)
- err = (params.result == SHFL_FILE_EXISTS) ? -EEXIST : -ENOENT;
- if (err) {
- kfree(sf_handle);
- return err;
- }
-
- /* the host may have given us different attr then requested */
- sf_i->force_restat = 1;
-
- /* init our handle struct and add it to the inode's handles list */
- sf_handle->handle = params.handle;
- sf_handle->root = VBOXSF_SBI(inode->i_sb)->root;
- sf_handle->access_flags = access_flags;
- kref_init(&sf_handle->refcount);
-
- mutex_lock(&sf_i->handle_list_mutex);
- list_add(&sf_handle->head, &sf_i->handle_list);
- mutex_unlock(&sf_i->handle_list_mutex);
-
- file->private_data = sf_handle;
- return 0;
-}
-
-static void vboxsf_handle_release(struct kref *refcount)
-{
- struct vboxsf_handle *sf_handle =
- container_of(refcount, struct vboxsf_handle, refcount);
-
- vboxsf_close(sf_handle->root, sf_handle->handle);
- kfree(sf_handle);
-}
-
-static int vboxsf_file_release(struct inode *inode, struct file *file)
-{
- struct vboxsf_inode *sf_i = VBOXSF_I(inode);
- struct vboxsf_handle *sf_handle = file->private_data;
-
- /*
- * When a file is closed on our (the guest) side, we want any subsequent
- * accesses done on the host side to see all changes done from our side.
- */
- filemap_write_and_wait(inode->i_mapping);
-
- mutex_lock(&sf_i->handle_list_mutex);
- list_del(&sf_handle->head);
- mutex_unlock(&sf_i->handle_list_mutex);
-
- kref_put(&sf_handle->refcount, vboxsf_handle_release);
- return 0;
-}
-
-/*
- * Write back dirty pages now, because there may not be any suitable
- * open files later
- */
-static void vboxsf_vma_close(struct vm_area_struct *vma)
-{
- filemap_write_and_wait(vma->vm_file->f_mapping);
-}
-
-static const struct vm_operations_struct vboxsf_file_vm_ops = {
- .close = vboxsf_vma_close,
- .fault = filemap_fault,
- .map_pages = filemap_map_pages,
-};
-
-static int vboxsf_file_mmap(struct file *file, struct vm_area_struct *vma)
-{
- int err;
-
- err = generic_file_mmap(file, vma);
- if (!err)
- vma->vm_ops = &vboxsf_file_vm_ops;
-
- return err;
-}
-
-/*
- * Note that since we are accessing files on the host's filesystem, files
- * may always be changed underneath us by the host!
- *
- * The vboxsf API between the guest and the host does not offer any functions
- * to deal with this. There is no inode-generation to check for changes, no
- * events / callback on changes and no way to lock files.
- *
- * To avoid returning stale data when a file gets *opened* on our (the guest)
- * side, we do a "stat" on the host side, then compare the mtime with the
- * last known mtime and invalidate the page-cache if they differ.
- * This is done from vboxsf_inode_revalidate().
- *
- * When reads are done through the read_iter fop, it is possible to do
- * further cache revalidation then, there are 3 options to deal with this:
- *
- * 1) Rely solely on the revalidation done at open time
- * 2) Do another "stat" and compare mtime again. Unfortunately the vboxsf
- * host API does not allow stat on handles, so we would need to use
- * file->f_path.dentry and the stat will then fail if the file was unlinked
- * or renamed (and there is no thing like NFS' silly-rename). So we get:
- * 2a) "stat" and compare mtime, on stat failure invalidate the cache
- * 2b) "stat" and compare mtime, on stat failure do nothing
- * 3) Simply always call invalidate_inode_pages2_range on the range of the read
- *
- * Currently we are keeping things KISS and using option 1. this allows
- * directly using generic_file_read_iter without wrapping it.
- *
- * This means that only data written on the host side before open() on
- * the guest side is guaranteed to be seen by the guest. If necessary
- * we may provide other read-cache strategies in the future and make this
- * configurable through a mount option.
- */
-const struct file_operations vboxsf_reg_fops = {
- .llseek = generic_file_llseek,
- .read_iter = generic_file_read_iter,
- .write_iter = generic_file_write_iter,
- .mmap = vboxsf_file_mmap,
- .open = vboxsf_file_open,
- .release = vboxsf_file_release,
- .fsync = noop_fsync,
- .splice_read = generic_file_splice_read,
-};
-
-const struct inode_operations vboxsf_reg_iops = {
- .getattr = vboxsf_getattr,
- .setattr = vboxsf_setattr
-};
-
-static int vboxsf_readpage(struct file *file, struct page *page)
-{
- struct vboxsf_handle *sf_handle = file->private_data;
- loff_t off = page_offset(page);
- u32 nread = PAGE_SIZE;
- u8 *buf;
- int err;
-
- buf = kmap(page);
-
- err = vboxsf_read(sf_handle->root, sf_handle->handle, off, &nread, buf);
- if (err == 0) {
- memset(&buf[nread], 0, PAGE_SIZE - nread);
- flush_dcache_page(page);
- SetPageUptodate(page);
- } else {
- SetPageError(page);
- }
-
- kunmap(page);
- unlock_page(page);
- return err;
-}
-
-static struct vboxsf_handle *vboxsf_get_write_handle(struct vboxsf_inode *sf_i)
-{
- struct vboxsf_handle *h, *sf_handle = NULL;
-
- mutex_lock(&sf_i->handle_list_mutex);
- list_for_each_entry(h, &sf_i->handle_list, head) {
- if (h->access_flags == SHFL_CF_ACCESS_WRITE ||
- h->access_flags == SHFL_CF_ACCESS_READWRITE) {
- kref_get(&h->refcount);
- sf_handle = h;
- break;
- }
- }
- mutex_unlock(&sf_i->handle_list_mutex);
-
- return sf_handle;
-}
-
-static int vboxsf_writepage(struct page *page, struct writeback_control *wbc)
-{
- struct inode *inode = page->mapping->host;
- struct vboxsf_inode *sf_i = VBOXSF_I(inode);
- struct vboxsf_handle *sf_handle;
- loff_t off = page_offset(page);
- loff_t size = i_size_read(inode);
- u32 nwrite = PAGE_SIZE;
- u8 *buf;
- int err;
-
- if (off + PAGE_SIZE > size)
- nwrite = size & ~PAGE_MASK;
-
- sf_handle = vboxsf_get_write_handle(sf_i);
- if (!sf_handle)
- return -EBADF;
-
- buf = kmap(page);
- err = vboxsf_write(sf_handle->root, sf_handle->handle,
- off, &nwrite, buf);
- kunmap(page);
-
- kref_put(&sf_handle->refcount, vboxsf_handle_release);
-
- if (err == 0) {
- ClearPageError(page);
- /* mtime changed */
- sf_i->force_restat = 1;
- } else {
- ClearPageUptodate(page);
- }
-
- unlock_page(page);
- return err;
-}
-
-static int vboxsf_write_end(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned int len, unsigned int copied,
- struct page *page, void *fsdata)
-{
- struct inode *inode = mapping->host;
- struct vboxsf_handle *sf_handle = file->private_data;
- unsigned int from = pos & ~PAGE_MASK;
- u32 nwritten = len;
- u8 *buf;
- int err;
-
- buf = kmap(page);
- err = vboxsf_write(sf_handle->root, sf_handle->handle,
- pos, &nwritten, buf + from);
- kunmap(page);
-
- if (err) {
- nwritten = 0;
- goto out;
- }
-
- /* mtime changed */
- VBOXSF_I(inode)->force_restat = 1;
-
- if (!PageUptodate(page) && nwritten == PAGE_SIZE)
- SetPageUptodate(page);
-
- pos += nwritten;
- if (pos > inode->i_size)
- i_size_write(inode, pos);
-
-out:
- unlock_page(page);
- put_page(page);
-
- return nwritten;
-}
-
-const struct address_space_operations vboxsf_reg_aops = {
- .readpage = vboxsf_readpage,
- .writepage = vboxsf_writepage,
- .set_page_dirty = __set_page_dirty_nobuffers,
- .write_begin = simple_write_begin,
- .write_end = vboxsf_write_end,
-};
-
-static const char *vboxsf_get_link(struct dentry *dentry, struct inode *inode,
- struct delayed_call *done)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(inode->i_sb);
- struct shfl_string *path;
- char *link;
- int err;
-
- if (!dentry)
- return ERR_PTR(-ECHILD);
-
- path = vboxsf_path_from_dentry(sbi, dentry);
- if (IS_ERR(path))
- return (char *)path;
-
- link = kzalloc(PATH_MAX, GFP_KERNEL);
- if (!link) {
- __putname(path);
- return ERR_PTR(-ENOMEM);
- }
-
- err = vboxsf_readlink(sbi->root, path, PATH_MAX, link);
- __putname(path);
- if (err) {
- kfree(link);
- return ERR_PTR(err);
- }
-
- set_delayed_call(done, kfree_link, link);
- return link;
-}
-
-const struct inode_operations vboxsf_lnk_iops = {
- .get_link = vboxsf_get_link
-};
+++ /dev/null
-/* SPDX-License-Identifier: MIT */
-/*
- * VirtualBox Shared Folders: host interface definition.
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#ifndef SHFL_HOSTINTF_H
-#define SHFL_HOSTINTF_H
-
-#include <linux/vbox_vmmdev_types.h>
-
-/* The max in/out buffer size for a FN_READ or FN_WRITE call */
-#define SHFL_MAX_RW_COUNT (16 * SZ_1M)
-
-/*
- * Structures shared between guest and the service
- * can be relocated and use offsets to point to variable
- * length parts.
- *
- * Shared folders protocol works with handles.
- * Before doing any action on a file system object,
- * one have to obtain the object handle via a SHFL_FN_CREATE
- * request. A handle must be closed with SHFL_FN_CLOSE.
- */
-
-enum {
- SHFL_FN_QUERY_MAPPINGS = 1, /* Query mappings changes. */
- SHFL_FN_QUERY_MAP_NAME = 2, /* Query map name. */
- SHFL_FN_CREATE = 3, /* Open/create object. */
- SHFL_FN_CLOSE = 4, /* Close object handle. */
- SHFL_FN_READ = 5, /* Read object content. */
- SHFL_FN_WRITE = 6, /* Write new object content. */
- SHFL_FN_LOCK = 7, /* Lock/unlock a range in the object. */
- SHFL_FN_LIST = 8, /* List object content. */
- SHFL_FN_INFORMATION = 9, /* Query/set object information. */
- /* Note function number 10 is not used! */
- SHFL_FN_REMOVE = 11, /* Remove object */
- SHFL_FN_MAP_FOLDER_OLD = 12, /* Map folder (legacy) */
- SHFL_FN_UNMAP_FOLDER = 13, /* Unmap folder */
- SHFL_FN_RENAME = 14, /* Rename object */
- SHFL_FN_FLUSH = 15, /* Flush file */
- SHFL_FN_SET_UTF8 = 16, /* Select UTF8 filename encoding */
- SHFL_FN_MAP_FOLDER = 17, /* Map folder */
- SHFL_FN_READLINK = 18, /* Read symlink dest (as of VBox 4.0) */
- SHFL_FN_SYMLINK = 19, /* Create symlink (as of VBox 4.0) */
- SHFL_FN_SET_SYMLINKS = 20, /* Ask host to show symlinks (4.0+) */
-};
-
-/* Root handles for a mapping are of type u32, Root handles are unique. */
-#define SHFL_ROOT_NIL UINT_MAX
-
-/* Shared folders handle for an opened object are of type u64. */
-#define SHFL_HANDLE_NIL ULLONG_MAX
-
-/* Hardcoded maximum length (in chars) of a shared folder name. */
-#define SHFL_MAX_LEN (256)
-/* Hardcoded maximum number of shared folder mapping available to the guest. */
-#define SHFL_MAX_MAPPINGS (64)
-
-/** Shared folder string buffer structure. */
-struct shfl_string {
- /** Allocated size of the string member in bytes. */
- u16 size;
-
- /** Length of string without trailing nul in bytes. */
- u16 length;
-
- /** UTF-8 or UTF-16 string. Nul terminated. */
- union {
- u8 utf8[2];
- u16 utf16[1];
- u16 ucs2[1]; /* misnomer, use utf16. */
- } string;
-};
-VMMDEV_ASSERT_SIZE(shfl_string, 6);
-
-/* The size of shfl_string w/o the string part. */
-#define SHFLSTRING_HEADER_SIZE 4
-
-/* Calculate size of the string. */
-static inline u32 shfl_string_buf_size(const struct shfl_string *string)
-{
- return string ? SHFLSTRING_HEADER_SIZE + string->size : 0;
-}
-
-/* Set user id on execution (S_ISUID). */
-#define SHFL_UNIX_ISUID 0004000U
-/* Set group id on execution (S_ISGID). */
-#define SHFL_UNIX_ISGID 0002000U
-/* Sticky bit (S_ISVTX / S_ISTXT). */
-#define SHFL_UNIX_ISTXT 0001000U
-
-/* Owner readable (S_IRUSR). */
-#define SHFL_UNIX_IRUSR 0000400U
-/* Owner writable (S_IWUSR). */
-#define SHFL_UNIX_IWUSR 0000200U
-/* Owner executable (S_IXUSR). */
-#define SHFL_UNIX_IXUSR 0000100U
-
-/* Group readable (S_IRGRP). */
-#define SHFL_UNIX_IRGRP 0000040U
-/* Group writable (S_IWGRP). */
-#define SHFL_UNIX_IWGRP 0000020U
-/* Group executable (S_IXGRP). */
-#define SHFL_UNIX_IXGRP 0000010U
-
-/* Other readable (S_IROTH). */
-#define SHFL_UNIX_IROTH 0000004U
-/* Other writable (S_IWOTH). */
-#define SHFL_UNIX_IWOTH 0000002U
-/* Other executable (S_IXOTH). */
-#define SHFL_UNIX_IXOTH 0000001U
-
-/* Named pipe (fifo) (S_IFIFO). */
-#define SHFL_TYPE_FIFO 0010000U
-/* Character device (S_IFCHR). */
-#define SHFL_TYPE_DEV_CHAR 0020000U
-/* Directory (S_IFDIR). */
-#define SHFL_TYPE_DIRECTORY 0040000U
-/* Block device (S_IFBLK). */
-#define SHFL_TYPE_DEV_BLOCK 0060000U
-/* Regular file (S_IFREG). */
-#define SHFL_TYPE_FILE 0100000U
-/* Symbolic link (S_IFLNK). */
-#define SHFL_TYPE_SYMLINK 0120000U
-/* Socket (S_IFSOCK). */
-#define SHFL_TYPE_SOCKET 0140000U
-/* Whiteout (S_IFWHT). */
-#define SHFL_TYPE_WHITEOUT 0160000U
-/* Type mask (S_IFMT). */
-#define SHFL_TYPE_MASK 0170000U
-
-/* Checks the mode flags indicate a directory (S_ISDIR). */
-#define SHFL_IS_DIRECTORY(m) (((m) & SHFL_TYPE_MASK) == SHFL_TYPE_DIRECTORY)
-/* Checks the mode flags indicate a symbolic link (S_ISLNK). */
-#define SHFL_IS_SYMLINK(m) (((m) & SHFL_TYPE_MASK) == SHFL_TYPE_SYMLINK)
-
-/** The available additional information in a shfl_fsobjattr object. */
-enum shfl_fsobjattr_add {
- /** No additional information is available / requested. */
- SHFLFSOBJATTRADD_NOTHING = 1,
- /**
- * The additional unix attributes (shfl_fsobjattr::u::unix_attr) are
- * available / requested.
- */
- SHFLFSOBJATTRADD_UNIX,
- /**
- * The additional extended attribute size (shfl_fsobjattr::u::size) is
- * available / requested.
- */
- SHFLFSOBJATTRADD_EASIZE,
- /**
- * The last valid item (inclusive).
- * The valid range is SHFLFSOBJATTRADD_NOTHING thru
- * SHFLFSOBJATTRADD_LAST.
- */
- SHFLFSOBJATTRADD_LAST = SHFLFSOBJATTRADD_EASIZE,
-
- /** The usual 32-bit hack. */
- SHFLFSOBJATTRADD_32BIT_SIZE_HACK = 0x7fffffff
-};
-
-/**
- * Additional unix Attributes, these are available when
- * shfl_fsobjattr.additional == SHFLFSOBJATTRADD_UNIX.
- */
-struct shfl_fsobjattr_unix {
- /**
- * The user owning the filesystem object (st_uid).
- * This field is ~0U if not supported.
- */
- u32 uid;
-
- /**
- * The group the filesystem object is assigned (st_gid).
- * This field is ~0U if not supported.
- */
- u32 gid;
-
- /**
- * Number of hard links to this filesystem object (st_nlink).
- * This field is 1 if the filesystem doesn't support hardlinking or
- * the information isn't available.
- */
- u32 hardlinks;
-
- /**
- * The device number of the device which this filesystem object resides
- * on (st_dev). This field is 0 if this information is not available.
- */
- u32 inode_id_device;
-
- /**
- * The unique identifier (within the filesystem) of this filesystem
- * object (st_ino). Together with inode_id_device, this field can be
- * used as a OS wide unique id, when both their values are not 0.
- * This field is 0 if the information is not available.
- */
- u64 inode_id;
-
- /**
- * User flags (st_flags).
- * This field is 0 if this information is not available.
- */
- u32 flags;
-
- /**
- * The current generation number (st_gen).
- * This field is 0 if this information is not available.
- */
- u32 generation_id;
-
- /**
- * The device number of a char. or block device type object (st_rdev).
- * This field is 0 if the file isn't a char. or block device or when
- * the OS doesn't use the major+minor device idenfication scheme.
- */
- u32 device;
-} __packed;
-
-/** Extended attribute size. */
-struct shfl_fsobjattr_easize {
- /** Size of EAs. */
- s64 cb;
-} __packed;
-
-/** Shared folder filesystem object attributes. */
-struct shfl_fsobjattr {
- /** Mode flags (st_mode). SHFL_UNIX_*, SHFL_TYPE_*, and SHFL_DOS_*. */
- u32 mode;
-
- /** The additional attributes available. */
- enum shfl_fsobjattr_add additional;
-
- /**
- * Additional attributes.
- *
- * Unless explicitly specified to an API, the API can provide additional
- * data as it is provided by the underlying OS.
- */
- union {
- struct shfl_fsobjattr_unix unix_attr;
- struct shfl_fsobjattr_easize size;
- } __packed u;
-} __packed;
-VMMDEV_ASSERT_SIZE(shfl_fsobjattr, 44);
-
-struct shfl_timespec {
- s64 ns_relative_to_unix_epoch;
-};
-
-/** Filesystem object information structure. */
-struct shfl_fsobjinfo {
- /**
- * Logical size (st_size).
- * For normal files this is the size of the file.
- * For symbolic links, this is the length of the path name contained
- * in the symbolic link.
- * For other objects this fields needs to be specified.
- */
- s64 size;
-
- /** Disk allocation size (st_blocks * DEV_BSIZE). */
- s64 allocated;
-
- /** Time of last access (st_atime). */
- struct shfl_timespec access_time;
-
- /** Time of last data modification (st_mtime). */
- struct shfl_timespec modification_time;
-
- /**
- * Time of last status change (st_ctime).
- * If not available this is set to modification_time.
- */
- struct shfl_timespec change_time;
-
- /**
- * Time of file birth (st_birthtime).
- * If not available this is set to change_time.
- */
- struct shfl_timespec birth_time;
-
- /** Attributes. */
- struct shfl_fsobjattr attr;
-
-} __packed;
-VMMDEV_ASSERT_SIZE(shfl_fsobjinfo, 92);
-
-/**
- * result of an open/create request.
- * Along with handle value the result code
- * identifies what has happened while
- * trying to open the object.
- */
-enum shfl_create_result {
- SHFL_NO_RESULT,
- /** Specified path does not exist. */
- SHFL_PATH_NOT_FOUND,
- /** Path to file exists, but the last component does not. */
- SHFL_FILE_NOT_FOUND,
- /** File already exists and either has been opened or not. */
- SHFL_FILE_EXISTS,
- /** New file was created. */
- SHFL_FILE_CREATED,
- /** Existing file was replaced or overwritten. */
- SHFL_FILE_REPLACED
-};
-
-/* No flags. Initialization value. */
-#define SHFL_CF_NONE (0x00000000)
-
-/*
- * Only lookup the object, do not return a handle. When this is set all other
- * flags are ignored.
- */
-#define SHFL_CF_LOOKUP (0x00000001)
-
-/*
- * Open parent directory of specified object.
- * Useful for the corresponding Windows FSD flag
- * and for opening paths like \\dir\\*.* to search the 'dir'.
- */
-#define SHFL_CF_OPEN_TARGET_DIRECTORY (0x00000002)
-
-/* Create/open a directory. */
-#define SHFL_CF_DIRECTORY (0x00000004)
-
-/*
- * Open/create action to do if object exists
- * and if the object does not exists.
- * REPLACE file means atomically DELETE and CREATE.
- * OVERWRITE file means truncating the file to 0 and
- * setting new size.
- * When opening an existing directory REPLACE and OVERWRITE
- * actions are considered invalid, and cause returning
- * FILE_EXISTS with NIL handle.
- */
-#define SHFL_CF_ACT_MASK_IF_EXISTS (0x000000f0)
-#define SHFL_CF_ACT_MASK_IF_NEW (0x00000f00)
-
-/* What to do if object exists. */
-#define SHFL_CF_ACT_OPEN_IF_EXISTS (0x00000000)
-#define SHFL_CF_ACT_FAIL_IF_EXISTS (0x00000010)
-#define SHFL_CF_ACT_REPLACE_IF_EXISTS (0x00000020)
-#define SHFL_CF_ACT_OVERWRITE_IF_EXISTS (0x00000030)
-
-/* What to do if object does not exist. */
-#define SHFL_CF_ACT_CREATE_IF_NEW (0x00000000)
-#define SHFL_CF_ACT_FAIL_IF_NEW (0x00000100)
-
-/* Read/write requested access for the object. */
-#define SHFL_CF_ACCESS_MASK_RW (0x00003000)
-
-/* No access requested. */
-#define SHFL_CF_ACCESS_NONE (0x00000000)
-/* Read access requested. */
-#define SHFL_CF_ACCESS_READ (0x00001000)
-/* Write access requested. */
-#define SHFL_CF_ACCESS_WRITE (0x00002000)
-/* Read/Write access requested. */
-#define SHFL_CF_ACCESS_READWRITE (0x00003000)
-
-/* Requested share access for the object. */
-#define SHFL_CF_ACCESS_MASK_DENY (0x0000c000)
-
-/* Allow any access. */
-#define SHFL_CF_ACCESS_DENYNONE (0x00000000)
-/* Do not allow read. */
-#define SHFL_CF_ACCESS_DENYREAD (0x00004000)
-/* Do not allow write. */
-#define SHFL_CF_ACCESS_DENYWRITE (0x00008000)
-/* Do not allow access. */
-#define SHFL_CF_ACCESS_DENYALL (0x0000c000)
-
-/* Requested access to attributes of the object. */
-#define SHFL_CF_ACCESS_MASK_ATTR (0x00030000)
-
-/* No access requested. */
-#define SHFL_CF_ACCESS_ATTR_NONE (0x00000000)
-/* Read access requested. */
-#define SHFL_CF_ACCESS_ATTR_READ (0x00010000)
-/* Write access requested. */
-#define SHFL_CF_ACCESS_ATTR_WRITE (0x00020000)
-/* Read/Write access requested. */
-#define SHFL_CF_ACCESS_ATTR_READWRITE (0x00030000)
-
-/*
- * The file is opened in append mode.
- * Ignored if SHFL_CF_ACCESS_WRITE is not set.
- */
-#define SHFL_CF_ACCESS_APPEND (0x00040000)
-
-/** Create parameters buffer struct for SHFL_FN_CREATE call */
-struct shfl_createparms {
- /** Returned handle of opened object. */
- u64 handle;
-
- /** Returned result of the operation */
- enum shfl_create_result result;
-
- /** SHFL_CF_* */
- u32 create_flags;
-
- /**
- * Attributes of object to create and
- * returned actual attributes of opened/created object.
- */
- struct shfl_fsobjinfo info;
-} __packed;
-
-/** Shared Folder directory information */
-struct shfl_dirinfo {
- /** Full information about the object. */
- struct shfl_fsobjinfo info;
- /**
- * The length of the short field (number of UTF16 chars).
- * It is 16-bit for reasons of alignment.
- */
- u16 short_name_len;
- /**
- * The short name for 8.3 compatibility.
- * Empty string if not available.
- */
- u16 short_name[14];
- struct shfl_string name;
-};
-
-/** Shared folder filesystem properties. */
-struct shfl_fsproperties {
- /**
- * The maximum size of a filesystem object name.
- * This does not include the '\\0'.
- */
- u32 max_component_len;
-
- /**
- * True if the filesystem is remote.
- * False if the filesystem is local.
- */
- bool remote;
-
- /**
- * True if the filesystem is case sensitive.
- * False if the filesystem is case insensitive.
- */
- bool case_sensitive;
-
- /**
- * True if the filesystem is mounted read only.
- * False if the filesystem is mounted read write.
- */
- bool read_only;
-
- /**
- * True if the filesystem can encode unicode object names.
- * False if it can't.
- */
- bool supports_unicode;
-
- /**
- * True if the filesystem is compresses.
- * False if it isn't or we don't know.
- */
- bool compressed;
-
- /**
- * True if the filesystem compresses of individual files.
- * False if it doesn't or we don't know.
- */
- bool file_compression;
-};
-VMMDEV_ASSERT_SIZE(shfl_fsproperties, 12);
-
-struct shfl_volinfo {
- s64 total_allocation_bytes;
- s64 available_allocation_bytes;
- u32 bytes_per_allocation_unit;
- u32 bytes_per_sector;
- u32 serial;
- struct shfl_fsproperties properties;
-};
-
-
-/** SHFL_FN_MAP_FOLDER Parameters structure. */
-struct shfl_map_folder {
- /**
- * pointer, in:
- * Points to struct shfl_string buffer.
- */
- struct vmmdev_hgcm_function_parameter path;
-
- /**
- * pointer, out: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in: UTF16
- * Path delimiter
- */
- struct vmmdev_hgcm_function_parameter delimiter;
-
- /**
- * pointer, in: SHFLROOT (u32)
- * Case senstive flag
- */
- struct vmmdev_hgcm_function_parameter case_sensitive;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_MAP_FOLDER (4)
-
-
-/** SHFL_FN_UNMAP_FOLDER Parameters structure. */
-struct shfl_unmap_folder {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_UNMAP_FOLDER (1)
-
-
-/** SHFL_FN_CREATE Parameters structure. */
-struct shfl_create {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in:
- * Points to struct shfl_string buffer.
- */
- struct vmmdev_hgcm_function_parameter path;
-
- /**
- * pointer, in/out:
- * Points to struct shfl_createparms buffer.
- */
- struct vmmdev_hgcm_function_parameter parms;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_CREATE (3)
-
-
-/** SHFL_FN_CLOSE Parameters structure. */
-struct shfl_close {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * value64, in:
- * SHFLHANDLE (u64) of object to close.
- */
- struct vmmdev_hgcm_function_parameter handle;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_CLOSE (2)
-
-
-/** SHFL_FN_READ Parameters structure. */
-struct shfl_read {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * value64, in:
- * SHFLHANDLE (u64) of object to read from.
- */
- struct vmmdev_hgcm_function_parameter handle;
-
- /**
- * value64, in:
- * Offset to read from.
- */
- struct vmmdev_hgcm_function_parameter offset;
-
- /**
- * value64, in/out:
- * Bytes to read/How many were read.
- */
- struct vmmdev_hgcm_function_parameter cb;
-
- /**
- * pointer, out:
- * Buffer to place data to.
- */
- struct vmmdev_hgcm_function_parameter buffer;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_READ (5)
-
-
-/** SHFL_FN_WRITE Parameters structure. */
-struct shfl_write {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * value64, in:
- * SHFLHANDLE (u64) of object to write to.
- */
- struct vmmdev_hgcm_function_parameter handle;
-
- /**
- * value64, in:
- * Offset to write to.
- */
- struct vmmdev_hgcm_function_parameter offset;
-
- /**
- * value64, in/out:
- * Bytes to write/How many were written.
- */
- struct vmmdev_hgcm_function_parameter cb;
-
- /**
- * pointer, in:
- * Data to write.
- */
- struct vmmdev_hgcm_function_parameter buffer;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_WRITE (5)
-
-
-/*
- * SHFL_FN_LIST
- * Listing information includes variable length RTDIRENTRY[EX] structures.
- */
-
-#define SHFL_LIST_NONE 0
-#define SHFL_LIST_RETURN_ONE 1
-
-/** SHFL_FN_LIST Parameters structure. */
-struct shfl_list {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * value64, in:
- * SHFLHANDLE (u64) of object to be listed.
- */
- struct vmmdev_hgcm_function_parameter handle;
-
- /**
- * value32, in:
- * List flags SHFL_LIST_*.
- */
- struct vmmdev_hgcm_function_parameter flags;
-
- /**
- * value32, in/out:
- * Bytes to be used for listing information/How many bytes were used.
- */
- struct vmmdev_hgcm_function_parameter cb;
-
- /**
- * pointer, in/optional
- * Points to struct shfl_string buffer that specifies a search path.
- */
- struct vmmdev_hgcm_function_parameter path;
-
- /**
- * pointer, out:
- * Buffer to place listing information to. (struct shfl_dirinfo)
- */
- struct vmmdev_hgcm_function_parameter buffer;
-
- /**
- * value32, in/out:
- * Indicates a key where the listing must be resumed.
- * in: 0 means start from begin of object.
- * out: 0 means listing completed.
- */
- struct vmmdev_hgcm_function_parameter resume_point;
-
- /**
- * pointer, out:
- * Number of files returned
- */
- struct vmmdev_hgcm_function_parameter file_count;
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_LIST (8)
-
-
-/** SHFL_FN_READLINK Parameters structure. */
-struct shfl_readLink {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in:
- * Points to struct shfl_string buffer.
- */
- struct vmmdev_hgcm_function_parameter path;
-
- /**
- * pointer, out:
- * Buffer to place data to.
- */
- struct vmmdev_hgcm_function_parameter buffer;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_READLINK (3)
-
-
-/* SHFL_FN_INFORMATION */
-
-/* Mask of Set/Get bit. */
-#define SHFL_INFO_MODE_MASK (0x1)
-/* Get information */
-#define SHFL_INFO_GET (0x0)
-/* Set information */
-#define SHFL_INFO_SET (0x1)
-
-/* Get name of the object. */
-#define SHFL_INFO_NAME (0x2)
-/* Set size of object (extend/trucate); only applies to file objects */
-#define SHFL_INFO_SIZE (0x4)
-/* Get/Set file object info. */
-#define SHFL_INFO_FILE (0x8)
-/* Get volume information. */
-#define SHFL_INFO_VOLUME (0x10)
-
-/** SHFL_FN_INFORMATION Parameters structure. */
-struct shfl_information {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * value64, in:
- * SHFLHANDLE (u64) of object to be listed.
- */
- struct vmmdev_hgcm_function_parameter handle;
-
- /**
- * value32, in:
- * SHFL_INFO_*
- */
- struct vmmdev_hgcm_function_parameter flags;
-
- /**
- * value32, in/out:
- * Bytes to be used for information/How many bytes were used.
- */
- struct vmmdev_hgcm_function_parameter cb;
-
- /**
- * pointer, in/out:
- * Information to be set/get (shfl_fsobjinfo or shfl_string). Do not
- * forget to set the shfl_fsobjinfo::attr::additional for a get
- * operation as well.
- */
- struct vmmdev_hgcm_function_parameter info;
-
-};
-
-/* Number of parameters */
-#define SHFL_CPARMS_INFORMATION (5)
-
-
-/* SHFL_FN_REMOVE */
-
-#define SHFL_REMOVE_FILE (0x1)
-#define SHFL_REMOVE_DIR (0x2)
-#define SHFL_REMOVE_SYMLINK (0x4)
-
-/** SHFL_FN_REMOVE Parameters structure. */
-struct shfl_remove {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in:
- * Points to struct shfl_string buffer.
- */
- struct vmmdev_hgcm_function_parameter path;
-
- /**
- * value32, in:
- * remove flags (file/directory)
- */
- struct vmmdev_hgcm_function_parameter flags;
-
-};
-
-#define SHFL_CPARMS_REMOVE (3)
-
-
-/* SHFL_FN_RENAME */
-
-#define SHFL_RENAME_FILE (0x1)
-#define SHFL_RENAME_DIR (0x2)
-#define SHFL_RENAME_REPLACE_IF_EXISTS (0x4)
-
-/** SHFL_FN_RENAME Parameters structure. */
-struct shfl_rename {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in:
- * Points to struct shfl_string src.
- */
- struct vmmdev_hgcm_function_parameter src;
-
- /**
- * pointer, in:
- * Points to struct shfl_string dest.
- */
- struct vmmdev_hgcm_function_parameter dest;
-
- /**
- * value32, in:
- * rename flags (file/directory)
- */
- struct vmmdev_hgcm_function_parameter flags;
-
-};
-
-#define SHFL_CPARMS_RENAME (4)
-
-
-/** SHFL_FN_SYMLINK Parameters structure. */
-struct shfl_symlink {
- /**
- * pointer, in: SHFLROOT (u32)
- * Root handle of the mapping which name is queried.
- */
- struct vmmdev_hgcm_function_parameter root;
-
- /**
- * pointer, in:
- * Points to struct shfl_string of path for the new symlink.
- */
- struct vmmdev_hgcm_function_parameter new_path;
-
- /**
- * pointer, in:
- * Points to struct shfl_string of destination for symlink.
- */
- struct vmmdev_hgcm_function_parameter old_path;
-
- /**
- * pointer, out:
- * Information about created symlink.
- */
- struct vmmdev_hgcm_function_parameter info;
-
-};
-
-#define SHFL_CPARMS_SYMLINK (4)
-
-#endif
+++ /dev/null
-// SPDX-License-Identifier: MIT
-/*
- * VirtualBox Guest Shared Folders support: Virtual File System.
- *
- * Module initialization/finalization
- * File system registration/deregistration
- * Superblock reading
- * Few utility functions
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#include <linux/idr.h>
-#include <linux/fs_parser.h>
-#include <linux/magic.h>
-#include <linux/module.h>
-#include <linux/nls.h>
-#include <linux/statfs.h>
-#include <linux/vbox_utils.h>
-#include "vfsmod.h"
-
-#define VBOXSF_SUPER_MAGIC 0x786f4256 /* 'VBox' little endian */
-
-#define VBSF_MOUNT_SIGNATURE_BYTE_0 ('\000')
-#define VBSF_MOUNT_SIGNATURE_BYTE_1 ('\377')
-#define VBSF_MOUNT_SIGNATURE_BYTE_2 ('\376')
-#define VBSF_MOUNT_SIGNATURE_BYTE_3 ('\375')
-
-static int follow_symlinks;
-module_param(follow_symlinks, int, 0444);
-MODULE_PARM_DESC(follow_symlinks,
- "Let host resolve symlinks rather than showing them");
-
-static DEFINE_IDA(vboxsf_bdi_ida);
-static DEFINE_MUTEX(vboxsf_setup_mutex);
-static bool vboxsf_setup_done;
-static struct super_operations vboxsf_super_ops; /* forward declaration */
-static struct kmem_cache *vboxsf_inode_cachep;
-
-static char * const vboxsf_default_nls = CONFIG_NLS_DEFAULT;
-
-enum { opt_nls, opt_uid, opt_gid, opt_ttl, opt_dmode, opt_fmode,
- opt_dmask, opt_fmask };
-
-static const struct fs_parameter_spec vboxsf_param_specs[] = {
- fsparam_string ("nls", opt_nls),
- fsparam_u32 ("uid", opt_uid),
- fsparam_u32 ("gid", opt_gid),
- fsparam_u32 ("ttl", opt_ttl),
- fsparam_u32oct ("dmode", opt_dmode),
- fsparam_u32oct ("fmode", opt_fmode),
- fsparam_u32oct ("dmask", opt_dmask),
- fsparam_u32oct ("fmask", opt_fmask),
- {}
-};
-
-static const struct fs_parameter_description vboxsf_fs_parameters = {
- .name = "vboxsf",
- .specs = vboxsf_param_specs,
-};
-
-static int vboxsf_parse_param(struct fs_context *fc, struct fs_parameter *param)
-{
- struct vboxsf_fs_context *ctx = fc->fs_private;
- struct fs_parse_result result;
- kuid_t uid;
- kgid_t gid;
- int opt;
-
- opt = fs_parse(fc, &vboxsf_fs_parameters, param, &result);
- if (opt < 0)
- return opt;
-
- switch (opt) {
- case opt_nls:
- if (fc->purpose != FS_CONTEXT_FOR_MOUNT) {
- vbg_err("vboxsf: Cannot reconfigure nls option\n");
- return -EINVAL;
- }
- ctx->nls_name = param->string;
- param->string = NULL;
- break;
- case opt_uid:
- uid = make_kuid(current_user_ns(), result.uint_32);
- if (!uid_valid(uid))
- return -EINVAL;
- ctx->o.uid = uid;
- break;
- case opt_gid:
- gid = make_kgid(current_user_ns(), result.uint_32);
- if (!gid_valid(gid))
- return -EINVAL;
- ctx->o.gid = gid;
- break;
- case opt_ttl:
- ctx->o.ttl = msecs_to_jiffies(result.uint_32);
- break;
- case opt_dmode:
- if (result.uint_32 & ~0777)
- return -EINVAL;
- ctx->o.dmode = result.uint_32;
- ctx->o.dmode_set = true;
- break;
- case opt_fmode:
- if (result.uint_32 & ~0777)
- return -EINVAL;
- ctx->o.fmode = result.uint_32;
- ctx->o.fmode_set = true;
- break;
- case opt_dmask:
- if (result.uint_32 & ~07777)
- return -EINVAL;
- ctx->o.dmask = result.uint_32;
- break;
- case opt_fmask:
- if (result.uint_32 & ~07777)
- return -EINVAL;
- ctx->o.fmask = result.uint_32;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int vboxsf_fill_super(struct super_block *sb, struct fs_context *fc)
-{
- struct vboxsf_fs_context *ctx = fc->fs_private;
- struct shfl_string *folder_name, root_path;
- struct vboxsf_sbi *sbi;
- struct dentry *droot;
- struct inode *iroot;
- char *nls_name;
- size_t size;
- int err;
-
- if (!fc->source)
- return -EINVAL;
-
- sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
- return -ENOMEM;
-
- sbi->o = ctx->o;
- idr_init(&sbi->ino_idr);
- spin_lock_init(&sbi->ino_idr_lock);
- sbi->next_generation = 1;
- sbi->bdi_id = -1;
-
- /* Load nls if not utf8 */
- nls_name = ctx->nls_name ? ctx->nls_name : vboxsf_default_nls;
- if (strcmp(nls_name, "utf8") != 0) {
- if (nls_name == vboxsf_default_nls)
- sbi->nls = load_nls_default();
- else
- sbi->nls = load_nls(nls_name);
-
- if (!sbi->nls) {
- vbg_err("vboxsf: Count not load '%s' nls\n", nls_name);
- err = -EINVAL;
- goto fail_free;
- }
- }
-
- sbi->bdi_id = ida_simple_get(&vboxsf_bdi_ida, 0, 0, GFP_KERNEL);
- if (sbi->bdi_id < 0) {
- err = sbi->bdi_id;
- goto fail_free;
- }
-
- err = super_setup_bdi_name(sb, "vboxsf-%s.%d", fc->source, sbi->bdi_id);
- if (err)
- goto fail_free;
-
- /* Turn source into a shfl_string and map the folder */
- size = strlen(fc->source) + 1;
- folder_name = kmalloc(SHFLSTRING_HEADER_SIZE + size, GFP_KERNEL);
- if (!folder_name) {
- err = -ENOMEM;
- goto fail_free;
- }
- folder_name->size = size;
- folder_name->length = size - 1;
- strlcpy(folder_name->string.utf8, fc->source, size);
- err = vboxsf_map_folder(folder_name, &sbi->root);
- kfree(folder_name);
- if (err) {
- vbg_err("vboxsf: Host rejected mount of '%s' with error %d\n",
- fc->source, err);
- goto fail_free;
- }
-
- root_path.length = 1;
- root_path.size = 2;
- root_path.string.utf8[0] = '/';
- root_path.string.utf8[1] = 0;
- err = vboxsf_stat(sbi, &root_path, &sbi->root_info);
- if (err)
- goto fail_unmap;
-
- sb->s_magic = VBOXSF_SUPER_MAGIC;
- sb->s_blocksize = 1024;
- sb->s_maxbytes = MAX_LFS_FILESIZE;
- sb->s_op = &vboxsf_super_ops;
- sb->s_d_op = &vboxsf_dentry_ops;
-
- iroot = iget_locked(sb, 0);
- if (!iroot) {
- err = -ENOMEM;
- goto fail_unmap;
- }
- vboxsf_init_inode(sbi, iroot, &sbi->root_info);
- unlock_new_inode(iroot);
-
- droot = d_make_root(iroot);
- if (!droot) {
- err = -ENOMEM;
- goto fail_unmap;
- }
-
- sb->s_root = droot;
- sb->s_fs_info = sbi;
- return 0;
-
-fail_unmap:
- vboxsf_unmap_folder(sbi->root);
-fail_free:
- if (sbi->bdi_id >= 0)
- ida_simple_remove(&vboxsf_bdi_ida, sbi->bdi_id);
- if (sbi->nls)
- unload_nls(sbi->nls);
- idr_destroy(&sbi->ino_idr);
- kfree(sbi);
- return err;
-}
-
-static void vboxsf_inode_init_once(void *data)
-{
- struct vboxsf_inode *sf_i = data;
-
- mutex_init(&sf_i->handle_list_mutex);
- inode_init_once(&sf_i->vfs_inode);
-}
-
-static struct inode *vboxsf_alloc_inode(struct super_block *sb)
-{
- struct vboxsf_inode *sf_i;
-
- sf_i = kmem_cache_alloc(vboxsf_inode_cachep, GFP_NOFS);
- if (!sf_i)
- return NULL;
-
- sf_i->force_restat = 0;
- INIT_LIST_HEAD(&sf_i->handle_list);
-
- return &sf_i->vfs_inode;
-}
-
-static void vboxsf_free_inode(struct inode *inode)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(inode->i_sb);
- unsigned long flags;
-
- spin_lock_irqsave(&sbi->ino_idr_lock, flags);
- idr_remove(&sbi->ino_idr, inode->i_ino);
- spin_unlock_irqrestore(&sbi->ino_idr_lock, flags);
- kmem_cache_free(vboxsf_inode_cachep, VBOXSF_I(inode));
-}
-
-static void vboxsf_put_super(struct super_block *sb)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(sb);
-
- vboxsf_unmap_folder(sbi->root);
- if (sbi->bdi_id >= 0)
- ida_simple_remove(&vboxsf_bdi_ida, sbi->bdi_id);
- if (sbi->nls)
- unload_nls(sbi->nls);
-
- /*
- * vboxsf_free_inode uses the idr, make sure all delayed rcu free
- * inodes are flushed.
- */
- rcu_barrier();
- idr_destroy(&sbi->ino_idr);
- kfree(sbi);
-}
-
-static int vboxsf_statfs(struct dentry *dentry, struct kstatfs *stat)
-{
- struct super_block *sb = dentry->d_sb;
- struct shfl_volinfo shfl_volinfo;
- struct vboxsf_sbi *sbi;
- u32 buf_len;
- int err;
-
- sbi = VBOXSF_SBI(sb);
- buf_len = sizeof(shfl_volinfo);
- err = vboxsf_fsinfo(sbi->root, 0, SHFL_INFO_GET | SHFL_INFO_VOLUME,
- &buf_len, &shfl_volinfo);
- if (err)
- return err;
-
- stat->f_type = VBOXSF_SUPER_MAGIC;
- stat->f_bsize = shfl_volinfo.bytes_per_allocation_unit;
-
- do_div(shfl_volinfo.total_allocation_bytes,
- shfl_volinfo.bytes_per_allocation_unit);
- stat->f_blocks = shfl_volinfo.total_allocation_bytes;
-
- do_div(shfl_volinfo.available_allocation_bytes,
- shfl_volinfo.bytes_per_allocation_unit);
- stat->f_bfree = shfl_volinfo.available_allocation_bytes;
- stat->f_bavail = shfl_volinfo.available_allocation_bytes;
-
- stat->f_files = 1000;
- /*
- * Don't return 0 here since the guest may then think that it is not
- * possible to create any more files.
- */
- stat->f_ffree = 1000000;
- stat->f_fsid.val[0] = 0;
- stat->f_fsid.val[1] = 0;
- stat->f_namelen = 255;
- return 0;
-}
-
-static struct super_operations vboxsf_super_ops = {
- .alloc_inode = vboxsf_alloc_inode,
- .free_inode = vboxsf_free_inode,
- .put_super = vboxsf_put_super,
- .statfs = vboxsf_statfs,
-};
-
-static int vboxsf_setup(void)
-{
- int err;
-
- mutex_lock(&vboxsf_setup_mutex);
-
- if (vboxsf_setup_done)
- goto success;
-
- vboxsf_inode_cachep =
- kmem_cache_create("vboxsf_inode_cache",
- sizeof(struct vboxsf_inode), 0,
- (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD |
- SLAB_ACCOUNT),
- vboxsf_inode_init_once);
- if (!vboxsf_inode_cachep) {
- err = -ENOMEM;
- goto fail_nomem;
- }
-
- err = vboxsf_connect();
- if (err) {
- vbg_err("vboxsf: err %d connecting to guest PCI-device\n", err);
- vbg_err("vboxsf: make sure you are inside a VirtualBox VM\n");
- vbg_err("vboxsf: and check dmesg for vboxguest errors\n");
- goto fail_free_cache;
- }
-
- err = vboxsf_set_utf8();
- if (err) {
- vbg_err("vboxsf_setutf8 error %d\n", err);
- goto fail_disconnect;
- }
-
- if (!follow_symlinks) {
- err = vboxsf_set_symlinks();
- if (err)
- vbg_warn("vboxsf: Unable to show symlinks: %d\n", err);
- }
-
- vboxsf_setup_done = true;
-success:
- mutex_unlock(&vboxsf_setup_mutex);
- return 0;
-
-fail_disconnect:
- vboxsf_disconnect();
-fail_free_cache:
- kmem_cache_destroy(vboxsf_inode_cachep);
-fail_nomem:
- mutex_unlock(&vboxsf_setup_mutex);
- return err;
-}
-
-static int vboxsf_parse_monolithic(struct fs_context *fc, void *data)
-{
- char *options = data;
-
- if (options && options[0] == VBSF_MOUNT_SIGNATURE_BYTE_0 &&
- options[1] == VBSF_MOUNT_SIGNATURE_BYTE_1 &&
- options[2] == VBSF_MOUNT_SIGNATURE_BYTE_2 &&
- options[3] == VBSF_MOUNT_SIGNATURE_BYTE_3) {
- vbg_err("vboxsf: Old binary mount data not supported, remove obsolete mount.vboxsf and/or update your VBoxService.\n");
- return -EINVAL;
- }
-
- return generic_parse_monolithic(fc, data);
-}
-
-static int vboxsf_get_tree(struct fs_context *fc)
-{
- int err;
-
- err = vboxsf_setup();
- if (err)
- return err;
-
- return vfs_get_super(fc, vfs_get_independent_super, vboxsf_fill_super);
-}
-
-static int vboxsf_reconfigure(struct fs_context *fc)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(fc->root->d_sb);
- struct vboxsf_fs_context *ctx = fc->fs_private;
- struct inode *iroot;
-
- iroot = ilookup(fc->root->d_sb, 0);
- if (!iroot)
- return -ENOENT;
-
- /* Apply changed options to the root inode */
- sbi->o = ctx->o;
- vboxsf_init_inode(sbi, iroot, &sbi->root_info);
-
- return 0;
-}
-
-static void vboxsf_free_fc(struct fs_context *fc)
-{
- struct vboxsf_fs_context *ctx = fc->fs_private;
-
- kfree(ctx->nls_name);
- kfree(ctx);
-}
-
-static const struct fs_context_operations vboxsf_context_ops = {
- .free = vboxsf_free_fc,
- .parse_param = vboxsf_parse_param,
- .parse_monolithic = vboxsf_parse_monolithic,
- .get_tree = vboxsf_get_tree,
- .reconfigure = vboxsf_reconfigure,
-};
-
-static int vboxsf_init_fs_context(struct fs_context *fc)
-{
- struct vboxsf_fs_context *ctx;
-
- ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
- if (!ctx)
- return -ENOMEM;
-
- current_uid_gid(&ctx->o.uid, &ctx->o.gid);
-
- fc->fs_private = ctx;
- fc->ops = &vboxsf_context_ops;
- return 0;
-}
-
-static struct file_system_type vboxsf_fs_type = {
- .owner = THIS_MODULE,
- .name = "vboxsf",
- .init_fs_context = vboxsf_init_fs_context,
- .parameters = &vboxsf_fs_parameters,
- .kill_sb = kill_anon_super
-};
-
-/* Module initialization/finalization handlers */
-static int __init vboxsf_init(void)
-{
- return register_filesystem(&vboxsf_fs_type);
-}
-
-static void __exit vboxsf_fini(void)
-{
- unregister_filesystem(&vboxsf_fs_type);
-
- mutex_lock(&vboxsf_setup_mutex);
- if (vboxsf_setup_done) {
- vboxsf_disconnect();
- /*
- * Make sure all delayed rcu free inodes are flushed
- * before we destroy the cache.
- */
- rcu_barrier();
- kmem_cache_destroy(vboxsf_inode_cachep);
- }
- mutex_unlock(&vboxsf_setup_mutex);
-}
-
-module_init(vboxsf_init);
-module_exit(vboxsf_fini);
-
-MODULE_DESCRIPTION("Oracle VM VirtualBox Module for Host File System Access");
-MODULE_AUTHOR("Oracle Corporation");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS_FS("vboxsf");
+++ /dev/null
-// SPDX-License-Identifier: MIT
-/*
- * VirtualBox Guest Shared Folders support: Utility functions.
- * Mainly conversion from/to VirtualBox/Linux data structures.
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#include <linux/namei.h>
-#include <linux/nls.h>
-#include <linux/sizes.h>
-#include <linux/vfs.h>
-#include "vfsmod.h"
-
-struct inode *vboxsf_new_inode(struct super_block *sb)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(sb);
- struct inode *inode;
- unsigned long flags;
- int cursor, ret;
- u32 gen;
-
- inode = new_inode(sb);
- if (!inode)
- return ERR_PTR(-ENOMEM);
-
- idr_preload(GFP_KERNEL);
- spin_lock_irqsave(&sbi->ino_idr_lock, flags);
- cursor = idr_get_cursor(&sbi->ino_idr);
- ret = idr_alloc_cyclic(&sbi->ino_idr, inode, 1, 0, GFP_ATOMIC);
- if (ret >= 0 && ret < cursor)
- sbi->next_generation++;
- gen = sbi->next_generation;
- spin_unlock_irqrestore(&sbi->ino_idr_lock, flags);
- idr_preload_end();
-
- if (ret < 0) {
- iput(inode);
- return ERR_PTR(ret);
- }
-
- inode->i_ino = ret;
- inode->i_generation = gen;
- return inode;
-}
-
-/* set [inode] attributes based on [info], uid/gid based on [sbi] */
-void vboxsf_init_inode(struct vboxsf_sbi *sbi, struct inode *inode,
- const struct shfl_fsobjinfo *info)
-{
- const struct shfl_fsobjattr *attr;
- s64 allocated;
- int mode;
-
- attr = &info->attr;
-
-#define mode_set(r) ((attr->mode & (SHFL_UNIX_##r)) ? (S_##r) : 0)
-
- mode = mode_set(IRUSR);
- mode |= mode_set(IWUSR);
- mode |= mode_set(IXUSR);
-
- mode |= mode_set(IRGRP);
- mode |= mode_set(IWGRP);
- mode |= mode_set(IXGRP);
-
- mode |= mode_set(IROTH);
- mode |= mode_set(IWOTH);
- mode |= mode_set(IXOTH);
-
-#undef mode_set
-
- /* We use the host-side values for these */
- inode->i_flags |= S_NOATIME | S_NOCMTIME;
- inode->i_mapping->a_ops = &vboxsf_reg_aops;
-
- if (SHFL_IS_DIRECTORY(attr->mode)) {
- inode->i_mode = sbi->o.dmode_set ? sbi->o.dmode : mode;
- inode->i_mode &= ~sbi->o.dmask;
- inode->i_mode |= S_IFDIR;
- inode->i_op = &vboxsf_dir_iops;
- inode->i_fop = &vboxsf_dir_fops;
- /*
- * XXX: this probably should be set to the number of entries
- * in the directory plus two (. ..)
- */
- set_nlink(inode, 1);
- } else if (SHFL_IS_SYMLINK(attr->mode)) {
- inode->i_mode = sbi->o.fmode_set ? sbi->o.fmode : mode;
- inode->i_mode &= ~sbi->o.fmask;
- inode->i_mode |= S_IFLNK;
- inode->i_op = &vboxsf_lnk_iops;
- set_nlink(inode, 1);
- } else {
- inode->i_mode = sbi->o.fmode_set ? sbi->o.fmode : mode;
- inode->i_mode &= ~sbi->o.fmask;
- inode->i_mode |= S_IFREG;
- inode->i_op = &vboxsf_reg_iops;
- inode->i_fop = &vboxsf_reg_fops;
- set_nlink(inode, 1);
- }
-
- inode->i_uid = sbi->o.uid;
- inode->i_gid = sbi->o.gid;
-
- inode->i_size = info->size;
- inode->i_blkbits = 12;
- /* i_blocks always in units of 512 bytes! */
- allocated = info->allocated + 511;
- do_div(allocated, 512);
- inode->i_blocks = allocated;
-
- inode->i_atime = ns_to_timespec64(
- info->access_time.ns_relative_to_unix_epoch);
- inode->i_ctime = ns_to_timespec64(
- info->change_time.ns_relative_to_unix_epoch);
- inode->i_mtime = ns_to_timespec64(
- info->modification_time.ns_relative_to_unix_epoch);
-}
-
-int vboxsf_create_at_dentry(struct dentry *dentry,
- struct shfl_createparms *params)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
- struct shfl_string *path;
- int err;
-
- path = vboxsf_path_from_dentry(sbi, dentry);
- if (IS_ERR(path))
- return PTR_ERR(path);
-
- err = vboxsf_create(sbi->root, path, params);
- __putname(path);
-
- return err;
-}
-
-int vboxsf_stat(struct vboxsf_sbi *sbi, struct shfl_string *path,
- struct shfl_fsobjinfo *info)
-{
- struct shfl_createparms params = {};
- int err;
-
- params.handle = SHFL_HANDLE_NIL;
- params.create_flags = SHFL_CF_LOOKUP | SHFL_CF_ACT_FAIL_IF_NEW;
-
- err = vboxsf_create(sbi->root, path, ¶ms);
- if (err)
- return err;
-
- if (params.result != SHFL_FILE_EXISTS)
- return -ENOENT;
-
- if (info)
- *info = params.info;
-
- return 0;
-}
-
-int vboxsf_stat_dentry(struct dentry *dentry, struct shfl_fsobjinfo *info)
-{
- struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
- struct shfl_string *path;
- int err;
-
- path = vboxsf_path_from_dentry(sbi, dentry);
- if (IS_ERR(path))
- return PTR_ERR(path);
-
- err = vboxsf_stat(sbi, path, info);
- __putname(path);
- return err;
-}
-
-int vboxsf_inode_revalidate(struct dentry *dentry)
-{
- struct vboxsf_sbi *sbi;
- struct vboxsf_inode *sf_i;
- struct shfl_fsobjinfo info;
- struct timespec64 prev_mtime;
- struct inode *inode;
- int err;
-
- if (!dentry || !d_really_is_positive(dentry))
- return -EINVAL;
-
- inode = d_inode(dentry);
- prev_mtime = inode->i_mtime;
- sf_i = VBOXSF_I(inode);
- sbi = VBOXSF_SBI(dentry->d_sb);
- if (!sf_i->force_restat) {
- if (time_before(jiffies, dentry->d_time + sbi->o.ttl))
- return 0;
- }
-
- err = vboxsf_stat_dentry(dentry, &info);
- if (err)
- return err;
-
- dentry->d_time = jiffies;
- sf_i->force_restat = 0;
- vboxsf_init_inode(sbi, inode, &info);
-
- /*
- * If the file was changed on the host side we need to invalidate the
- * page-cache for it. Note this also gets triggered by our own writes,
- * this is unavoidable.
- */
- if (timespec64_compare(&inode->i_mtime, &prev_mtime) > 0)
- invalidate_inode_pages2(inode->i_mapping);
-
- return 0;
-}
-
-int vboxsf_getattr(const struct path *path, struct kstat *kstat,
- u32 request_mask, unsigned int flags)
-{
- int err;
- struct dentry *dentry = path->dentry;
- struct inode *inode = d_inode(dentry);
- struct vboxsf_inode *sf_i = VBOXSF_I(inode);
-
- switch (flags & AT_STATX_SYNC_TYPE) {
- case AT_STATX_DONT_SYNC:
- err = 0;
- break;
- case AT_STATX_FORCE_SYNC:
- sf_i->force_restat = 1;
- /* fall-through */
- default:
- err = vboxsf_inode_revalidate(dentry);
- }
- if (err)
- return err;
-
- generic_fillattr(d_inode(dentry), kstat);
- return 0;
-}
-
-int vboxsf_setattr(struct dentry *dentry, struct iattr *iattr)
-{
- struct vboxsf_inode *sf_i = VBOXSF_I(d_inode(dentry));
- struct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);
- struct shfl_createparms params = {};
- struct shfl_fsobjinfo info = {};
- u32 buf_len;
- int err;
-
- params.handle = SHFL_HANDLE_NIL;
- params.create_flags = 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.create_flags |= SHFL_CF_ACCESS_WRITE;
-
- err = vboxsf_create_at_dentry(dentry, ¶ms);
- if (err || params.result != SHFL_FILE_EXISTS)
- return err ? err : -ENOENT;
-
-#define mode_set(r) ((iattr->ia_mode & (S_##r)) ? SHFL_UNIX_##r : 0)
-
- /*
- * Setting the file size and setting the other attributes has to
- * be handled separately.
- */
- if (iattr->ia_valid & (ATTR_MODE | ATTR_ATIME | ATTR_MTIME)) {
- if (iattr->ia_valid & ATTR_MODE) {
- info.attr.mode = mode_set(IRUSR);
- info.attr.mode |= mode_set(IWUSR);
- info.attr.mode |= mode_set(IXUSR);
- info.attr.mode |= mode_set(IRGRP);
- info.attr.mode |= mode_set(IWGRP);
- info.attr.mode |= mode_set(IXGRP);
- info.attr.mode |= mode_set(IROTH);
- info.attr.mode |= mode_set(IWOTH);
- info.attr.mode |= mode_set(IXOTH);
-
- if (iattr->ia_mode & S_IFDIR)
- info.attr.mode |= SHFL_TYPE_DIRECTORY;
- else
- info.attr.mode |= SHFL_TYPE_FILE;
- }
-
- if (iattr->ia_valid & ATTR_ATIME)
- info.access_time.ns_relative_to_unix_epoch =
- timespec64_to_ns(&iattr->ia_atime);
-
- if (iattr->ia_valid & ATTR_MTIME)
- info.modification_time.ns_relative_to_unix_epoch =
- timespec64_to_ns(&iattr->ia_mtime);
-
- /*
- * Ignore ctime (inode change time) as it can't be set
- * from userland anyway.
- */
-
- buf_len = sizeof(info);
- err = vboxsf_fsinfo(sbi->root, params.handle,
- SHFL_INFO_SET | SHFL_INFO_FILE, &buf_len,
- &info);
- if (err) {
- vboxsf_close(sbi->root, params.handle);
- return err;
- }
-
- /* the host may have given us different attr then requested */
- sf_i->force_restat = 1;
- }
-
-#undef mode_set
-
- if (iattr->ia_valid & ATTR_SIZE) {
- memset(&info, 0, sizeof(info));
- info.size = iattr->ia_size;
- buf_len = sizeof(info);
- err = vboxsf_fsinfo(sbi->root, params.handle,
- SHFL_INFO_SET | SHFL_INFO_SIZE, &buf_len,
- &info);
- if (err) {
- vboxsf_close(sbi->root, params.handle);
- return err;
- }
-
- /* the host may have given us different attr then requested */
- sf_i->force_restat = 1;
- }
-
- vboxsf_close(sbi->root, params.handle);
-
- /* Update the inode with what the host has actually given us. */
- if (sf_i->force_restat)
- vboxsf_inode_revalidate(dentry);
-
- return 0;
-}
-
-/*
- * [dentry] contains string encoded in coding system that corresponds
- * to [sbi]->nls, we must convert it to UTF8 here.
- * Returns a shfl_string allocated through __getname (must be freed using
- * __putname), or an ERR_PTR on error.
- */
-struct shfl_string *vboxsf_path_from_dentry(struct vboxsf_sbi *sbi,
- struct dentry *dentry)
-{
- struct shfl_string *shfl_path;
- int path_len, out_len, nb;
- char *buf, *path;
- wchar_t uni;
- u8 *out;
-
- buf = __getname();
- if (!buf)
- return ERR_PTR(-ENOMEM);
-
- path = dentry_path_raw(dentry, buf, PATH_MAX);
- if (IS_ERR(path)) {
- __putname(buf);
- return (struct shfl_string *)path;
- }
- path_len = strlen(path);
-
- if (sbi->nls) {
- shfl_path = __getname();
- if (!shfl_path) {
- __putname(buf);
- return ERR_PTR(-ENOMEM);
- }
-
- out = shfl_path->string.utf8;
- out_len = PATH_MAX - SHFLSTRING_HEADER_SIZE - 1;
-
- while (path_len) {
- nb = sbi->nls->char2uni(path, path_len, &uni);
- if (nb < 0) {
- __putname(shfl_path);
- __putname(buf);
- return ERR_PTR(-EINVAL);
- }
- path += nb;
- path_len -= nb;
-
- nb = utf32_to_utf8(uni, out, out_len);
- if (nb < 0) {
- __putname(shfl_path);
- __putname(buf);
- return ERR_PTR(-ENAMETOOLONG);
- }
- out += nb;
- out_len -= nb;
- }
- *out = 0;
- shfl_path->length = out - shfl_path->string.utf8;
- shfl_path->size = shfl_path->length + 1;
- __putname(buf);
- } else {
- if ((SHFLSTRING_HEADER_SIZE + path_len + 1) > PATH_MAX) {
- __putname(buf);
- return ERR_PTR(-ENAMETOOLONG);
- }
- /*
- * dentry_path stores the name at the end of buf, but the
- * shfl_string string we return must be properly aligned.
- */
- shfl_path = (struct shfl_string *)buf;
- memmove(shfl_path->string.utf8, path, path_len);
- shfl_path->string.utf8[path_len] = 0;
- shfl_path->length = path_len;
- shfl_path->size = path_len + 1;
- }
-
- return shfl_path;
-}
-
-int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
- const unsigned char *utf8_name, size_t utf8_len)
-{
- const char *in;
- char *out;
- size_t out_len;
- size_t out_bound_len;
- size_t in_bound_len;
-
- in = utf8_name;
- in_bound_len = utf8_len;
-
- out = name;
- out_len = 0;
- /* Reserve space for terminating 0 */
- out_bound_len = name_bound_len - 1;
-
- while (in_bound_len) {
- int nb;
- unicode_t uni;
-
- nb = utf8_to_utf32(in, in_bound_len, &uni);
- if (nb < 0)
- return -EINVAL;
-
- in += nb;
- in_bound_len -= nb;
-
- nb = sbi->nls->uni2char(uni, out, out_bound_len);
- if (nb < 0)
- return nb;
-
- out += nb;
- out_bound_len -= nb;
- out_len += nb;
- }
-
- *out = 0;
-
- return 0;
-}
-
-static struct vboxsf_dir_buf *vboxsf_dir_buf_alloc(struct list_head *list)
-{
- struct vboxsf_dir_buf *b;
-
- b = kmalloc(sizeof(*b), GFP_KERNEL);
- if (!b)
- return NULL;
-
- b->buf = kmalloc(DIR_BUFFER_SIZE, GFP_KERNEL);
- if (!b->buf) {
- kfree(b);
- return NULL;
- }
-
- b->entries = 0;
- b->used = 0;
- b->free = DIR_BUFFER_SIZE;
- list_add(&b->head, list);
-
- return b;
-}
-
-static void vboxsf_dir_buf_free(struct vboxsf_dir_buf *b)
-{
- list_del(&b->head);
- kfree(b->buf);
- kfree(b);
-}
-
-struct vboxsf_dir_info *vboxsf_dir_info_alloc(void)
-{
- struct vboxsf_dir_info *p;
-
- p = kmalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return NULL;
-
- INIT_LIST_HEAD(&p->info_list);
- return p;
-}
-
-void vboxsf_dir_info_free(struct vboxsf_dir_info *p)
-{
- struct list_head *list, *pos, *tmp;
-
- list = &p->info_list;
- list_for_each_safe(pos, tmp, list) {
- struct vboxsf_dir_buf *b;
-
- b = list_entry(pos, struct vboxsf_dir_buf, head);
- vboxsf_dir_buf_free(b);
- }
- kfree(p);
-}
-
-int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,
- u64 handle)
-{
- struct vboxsf_dir_buf *b;
- u32 entries, size;
- int err = 0;
- void *buf;
-
- /* vboxsf_dirinfo returns 1 on end of dir */
- while (err == 0) {
- b = vboxsf_dir_buf_alloc(&sf_d->info_list);
- if (!b) {
- err = -ENOMEM;
- break;
- }
-
- buf = b->buf;
- size = b->free;
-
- err = vboxsf_dirinfo(sbi->root, handle, NULL, 0, 0,
- &size, buf, &entries);
- if (err < 0)
- break;
-
- b->entries += entries;
- b->free -= size;
- b->used += size;
- }
-
- if (b && b->used == 0)
- vboxsf_dir_buf_free(b);
-
- /* -EILSEQ means the host could not translate a filename, ignore */
- if (err > 0 || err == -EILSEQ)
- err = 0;
-
- return err;
-}
+++ /dev/null
-// 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);
-}
+++ /dev/null
-/* SPDX-License-Identifier: MIT */
-/*
- * VirtualBox Guest Shared Folders support: module header.
- *
- * Copyright (C) 2006-2018 Oracle Corporation
- */
-
-#ifndef VFSMOD_H
-#define VFSMOD_H
-
-#include <linux/backing-dev.h>
-#include <linux/idr.h>
-#include "shfl_hostintf.h"
-
-#define DIR_BUFFER_SIZE SZ_16K
-
-/* The cast is to prevent assignment of void * to pointers of arbitrary type */
-#define VBOXSF_SBI(sb) ((struct vboxsf_sbi *)(sb)->s_fs_info)
-#define VBOXSF_I(i) container_of(i, struct vboxsf_inode, vfs_inode)
-
-struct vboxsf_options {
- unsigned long ttl;
- kuid_t uid;
- kgid_t gid;
- bool dmode_set;
- bool fmode_set;
- umode_t dmode;
- umode_t fmode;
- umode_t dmask;
- umode_t fmask;
-};
-
-struct vboxsf_fs_context {
- struct vboxsf_options o;
- char *nls_name;
-};
-
-/* per-shared folder information */
-struct vboxsf_sbi {
- struct vboxsf_options o;
- struct shfl_fsobjinfo root_info;
- struct idr ino_idr;
- spinlock_t ino_idr_lock; /* This protects ino_idr */
- struct nls_table *nls;
- u32 next_generation;
- u32 root;
- int bdi_id;
-};
-
-/* per-inode information */
-struct vboxsf_inode {
- /* some information was changed, update data on next revalidate */
- int force_restat;
- /* list of open handles for this inode + lock protecting it */
- struct list_head handle_list;
- /* This mutex protects handle_list accesses */
- struct mutex handle_list_mutex;
- /* The VFS inode struct */
- struct inode vfs_inode;
-};
-
-struct vboxsf_dir_info {
- struct list_head info_list;
-};
-
-struct vboxsf_dir_buf {
- size_t entries;
- size_t free;
- size_t used;
- void *buf;
- struct list_head head;
-};
-
-/* globals */
-extern const struct inode_operations vboxsf_dir_iops;
-extern const struct inode_operations vboxsf_lnk_iops;
-extern const struct inode_operations vboxsf_reg_iops;
-extern const struct file_operations vboxsf_dir_fops;
-extern const struct file_operations vboxsf_reg_fops;
-extern const struct address_space_operations vboxsf_reg_aops;
-extern const struct dentry_operations vboxsf_dentry_ops;
-
-/* from utils.c */
-struct inode *vboxsf_new_inode(struct super_block *sb);
-void vboxsf_init_inode(struct vboxsf_sbi *sbi, struct inode *inode,
- const struct shfl_fsobjinfo *info);
-int vboxsf_create_at_dentry(struct dentry *dentry,
- struct shfl_createparms *params);
-int vboxsf_stat(struct vboxsf_sbi *sbi, struct shfl_string *path,
- struct shfl_fsobjinfo *info);
-int vboxsf_stat_dentry(struct dentry *dentry, struct shfl_fsobjinfo *info);
-int vboxsf_inode_revalidate(struct dentry *dentry);
-int vboxsf_getattr(const struct path *path, struct kstat *kstat,
- u32 request_mask, unsigned int query_flags);
-int vboxsf_setattr(struct dentry *dentry, struct iattr *iattr);
-struct shfl_string *vboxsf_path_from_dentry(struct vboxsf_sbi *sbi,
- struct dentry *dentry);
-int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
- const unsigned char *utf8_name, size_t utf8_len);
-struct vboxsf_dir_info *vboxsf_dir_info_alloc(void);
-void vboxsf_dir_info_free(struct vboxsf_dir_info *p);
-int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,
- u64 handle);
-
-/* from vboxsf_wrappers.c */
-int vboxsf_connect(void);
-void vboxsf_disconnect(void);
-
-int vboxsf_create(u32 root, struct shfl_string *parsed_path,
- struct shfl_createparms *create_parms);
-
-int vboxsf_close(u32 root, u64 handle);
-int vboxsf_remove(u32 root, struct shfl_string *parsed_path, u32 flags);
-int vboxsf_rename(u32 root, struct shfl_string *src_path,
- struct shfl_string *dest_path, u32 flags);
-
-int vboxsf_read(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf);
-int vboxsf_write(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf);
-
-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);
-int vboxsf_fsinfo(u32 root, u64 handle, u32 flags,
- u32 *buf_len, void *buf);
-
-int vboxsf_map_folder(struct shfl_string *folder_name, u32 *root);
-int vboxsf_unmap_folder(u32 root);
-
-int vboxsf_readlink(u32 root, struct shfl_string *parsed_path,
- u32 buf_len, u8 *buf);
-int vboxsf_symlink(u32 root, struct shfl_string *new_path,
- struct shfl_string *old_path, struct shfl_fsobjinfo *buf);
-
-int vboxsf_set_utf8(void);
-int vboxsf_set_symlinks(void);
-
-#endif
projects / mirror_ubuntu-kernels.git / commitdiff