1 files changed, 0 insertions, 501 deletions
diff --git a/drivers/staging/vboxsf/super.c b/drivers/staging/vboxsf/super.c
deleted file mode 100644
index 0bf4d724aefd..000000000000
--- a/drivers/staging/vboxsf/super.c
+++ /dev/null
@@ -1,501 +0,0 @@
-// 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");