1 /* SPDX-License-Identifier: MIT */
3 * VirtualBox Guest Shared Folders support: module header.
5 * Copyright (C) 2006-2018 Oracle Corporation
11 #include <linux/backing-dev.h>
12 #include <linux/idr.h>
13 #include "shfl_hostintf.h"
15 #define DIR_BUFFER_SIZE SZ_16K
17 /* The cast is to prevent assignment of void * to pointers of arbitrary type */
18 #define VBOXSF_SBI(sb) ((struct vboxsf_sbi *)(sb)->s_fs_info)
19 #define VBOXSF_I(i) container_of(i, struct vboxsf_inode, vfs_inode)
23 struct vboxsf_options {
35 struct vboxsf_fs_context {
36 struct vboxsf_options o;
40 /* per-shared folder information */
42 struct vboxsf_options o;
43 struct shfl_fsobjinfo root_info;
45 spinlock_t ino_idr_lock; /* This protects ino_idr */
46 struct nls_table *nls;
52 /* per-inode information */
54 /* some information was changed, update data on next revalidate */
56 /* list of open handles for this inode + lock protecting it */
57 struct list_head handle_list;
58 /* This mutex protects handle_list accesses */
59 struct mutex handle_list_mutex;
60 /* The VFS inode struct */
61 struct inode vfs_inode;
64 struct vboxsf_dir_info {
65 struct list_head info_list;
68 struct vboxsf_dir_buf {
73 struct list_head head;
77 extern const struct inode_operations vboxsf_dir_iops;
78 extern const struct inode_operations vboxsf_lnk_iops;
79 extern const struct inode_operations vboxsf_reg_iops;
80 extern const struct file_operations vboxsf_dir_fops;
81 extern const struct file_operations vboxsf_reg_fops;
82 extern const struct address_space_operations vboxsf_reg_aops;
83 extern const struct dentry_operations vboxsf_dentry_ops;
86 struct vboxsf_handle *vboxsf_create_sf_handle(struct inode *inode,
87 u64 handle, u32 access_flags);
88 void vboxsf_release_sf_handle(struct inode *inode, struct vboxsf_handle *sf_handle);
91 struct inode *vboxsf_new_inode(struct super_block *sb);
92 int vboxsf_init_inode(struct vboxsf_sbi *sbi, struct inode *inode,
93 const struct shfl_fsobjinfo *info, bool reinit);
94 int vboxsf_create_at_dentry(struct dentry *dentry,
95 struct shfl_createparms *params);
96 int vboxsf_stat(struct vboxsf_sbi *sbi, struct shfl_string *path,
97 struct shfl_fsobjinfo *info);
98 int vboxsf_stat_dentry(struct dentry *dentry, struct shfl_fsobjinfo *info);
99 int vboxsf_inode_revalidate(struct dentry *dentry);
100 int vboxsf_getattr(struct user_namespace *mnt_userns, const struct path *path,
101 struct kstat *kstat, u32 request_mask,
102 unsigned int query_flags);
103 int vboxsf_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
104 struct iattr *iattr);
105 struct shfl_string *vboxsf_path_from_dentry(struct vboxsf_sbi *sbi,
106 struct dentry *dentry);
107 int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
108 const unsigned char *utf8_name, size_t utf8_len);
109 struct vboxsf_dir_info *vboxsf_dir_info_alloc(void);
110 void vboxsf_dir_info_free(struct vboxsf_dir_info *p);
111 int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,
114 /* from vboxsf_wrappers.c */
115 int vboxsf_connect(void);
116 void vboxsf_disconnect(void);
118 int vboxsf_create(u32 root, struct shfl_string *parsed_path,
119 struct shfl_createparms *create_parms);
121 int vboxsf_close(u32 root, u64 handle);
122 int vboxsf_remove(u32 root, struct shfl_string *parsed_path, u32 flags);
123 int vboxsf_rename(u32 root, struct shfl_string *src_path,
124 struct shfl_string *dest_path, u32 flags);
126 int vboxsf_read(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf);
127 int vboxsf_write(u32 root, u64 handle, u64 offset, u32 *buf_len, u8 *buf);
129 int vboxsf_dirinfo(u32 root, u64 handle,
130 struct shfl_string *parsed_path, u32 flags, u32 index,
131 u32 *buf_len, struct shfl_dirinfo *buf, u32 *file_count);
132 int vboxsf_fsinfo(u32 root, u64 handle, u32 flags,
133 u32 *buf_len, void *buf);
135 int vboxsf_map_folder(struct shfl_string *folder_name, u32 *root);
136 int vboxsf_unmap_folder(u32 root);
138 int vboxsf_readlink(u32 root, struct shfl_string *parsed_path,
139 u32 buf_len, u8 *buf);
140 int vboxsf_symlink(u32 root, struct shfl_string *new_path,
141 struct shfl_string *old_path, struct shfl_fsobjinfo *buf);
143 int vboxsf_set_utf8(void);
144 int vboxsf_set_symlinks(void);