mirror of
https://github.com/torvalds/linux.git
synced 2024-11-29 23:51:37 +00:00
0fd1695766
VirtualBox hosts can share folders with guests, this commit adds a VFS driver implementing the Linux-guest side of this, allowing folders exported by the host to be mounted under Linux. This driver depends on the guest <-> host IPC functions exported by the vboxguest driver. Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/* 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
|