diff options
Diffstat (limited to 'src/VBox/Additions/linux/sharedfolders/vfsmod.h')
| -rw-r--r-- | src/VBox/Additions/linux/sharedfolders/vfsmod.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/VBox/Additions/linux/sharedfolders/vfsmod.h b/src/VBox/Additions/linux/sharedfolders/vfsmod.h new file mode 100644 index 00000000..f7b71831 --- /dev/null +++ b/src/VBox/Additions/linux/sharedfolders/vfsmod.h @@ -0,0 +1,181 @@ +/* $Id: vfsmod.h $ */ +/** @file + * vboxsf - Linux Shared Folders VFS, internal header. + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef GA_INCLUDED_SRC_linux_sharedfolders_vfsmod_h +#define GA_INCLUDED_SRC_linux_sharedfolders_vfsmod_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#define LOG_GROUP LOG_GROUP_SHARED_FOLDERS +#include "the-linux-kernel.h" +#include <VBox/log.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) +# include <linux/backing-dev.h> +#endif + +#include <VBox/VBoxGuestLibSharedFolders.h> +#include "vbsfmount.h" + +#define DIR_BUFFER_SIZE (16*_1K) + +/* per-shared folder information */ +struct sf_glob_info { + VBGLSFMAP map; + struct nls_table *nls; + int ttl; + int uid; + int gid; + int dmode; + int fmode; + int dmask; + int fmask; +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) + struct backing_dev_info bdi; +#endif + char tag[32]; /**< Mount tag for VBoxService automounter. @since 6.0 */ +}; + +/* per-inode information */ +struct sf_inode_info { + /* which file */ + SHFLSTRING *path; + /* some information was changed, update data on next revalidate */ + int force_restat; + /* directory content changed, update the whole directory on next sf_getdent */ + int force_reread; + /* file structure, only valid between open() and release() */ + struct file *file; + /* handle valid if a file was created with sf_create_aux until it will + * be opened with sf_reg_open() */ + SHFLHANDLE handle; +}; + +struct sf_dir_info { + struct list_head info_list; +}; + +struct sf_dir_buf { + size_t cEntries; + size_t cbFree; + size_t cbUsed; + void *buf; + struct list_head head; +}; + +struct sf_reg_info { + SHFLHANDLE handle; +}; + +/* globals */ +extern VBGLSFCLIENT client_handle; + +/* forward declarations */ +extern struct inode_operations sf_dir_iops; +extern struct inode_operations sf_lnk_iops; +extern struct inode_operations sf_reg_iops; +extern struct file_operations sf_dir_fops; +extern struct file_operations sf_reg_fops; +extern struct dentry_operations sf_dentry_ops; +extern struct address_space_operations sf_reg_aops; + +extern void sf_init_inode(struct sf_glob_info *sf_g, struct inode *inode, + PSHFLFSOBJINFO info); +extern int sf_stat(const char *caller, struct sf_glob_info *sf_g, + SHFLSTRING * path, PSHFLFSOBJINFO result, int ok_to_fail); +extern int sf_inode_revalidate(struct dentry *dentry); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) +# if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) +extern int sf_getattr(const struct path *path, struct kstat *kstat, + u32 request_mask, unsigned int query_flags); +# else +extern int sf_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *kstat); +# endif +extern int sf_setattr(struct dentry *dentry, struct iattr *iattr); +#endif +extern int sf_path_from_dentry(const char *caller, struct sf_glob_info *sf_g, + struct sf_inode_info *sf_i, + struct dentry *dentry, SHFLSTRING ** result); +extern int sf_nlscpy(struct sf_glob_info *sf_g, char *name, + size_t name_bound_len, const unsigned char *utf8_name, + size_t utf8_len); +extern void sf_dir_info_free(struct sf_dir_info *p); +extern void sf_dir_info_empty(struct sf_dir_info *p); +extern struct sf_dir_info *sf_dir_info_alloc(void); +extern int sf_dir_read_all(struct sf_glob_info *sf_g, + struct sf_inode_info *sf_i, struct sf_dir_info *sf_d, + SHFLHANDLE handle); +extern int sf_init_backing_dev(struct sf_glob_info *sf_g); +extern void sf_done_backing_dev(struct sf_glob_info *sf_g); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0) +# define STRUCT_STATFS struct statfs +#else +# define STRUCT_STATFS struct kstatfs +#endif +int sf_get_volume_info(struct super_block *sb, STRUCT_STATFS * stat); + +#ifdef __cplusplus +# define CMC_API __attribute__ ((cdecl, regparm (0))) +#else +# define CMC_API __attribute__ ((regparm (0))) +#endif + +#define TRACE() LogFunc(("tracepoint\n")) + +/* Following casts are here to prevent assignment of void * to + pointers of arbitrary type */ +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0) +# define GET_GLOB_INFO(sb) ((struct sf_glob_info *) (sb)->u.generic_sbp) +# define SET_GLOB_INFO(sb, sf_g) (sb)->u.generic_sbp = sf_g +#else +# define GET_GLOB_INFO(sb) ((struct sf_glob_info *) (sb)->s_fs_info) +# define SET_GLOB_INFO(sb, sf_g) (sb)->s_fs_info = sf_g +#endif + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) || defined(KERNEL_FC6) +/* FC6 kernel 2.6.18, vanilla kernel 2.6.19+ */ +# define GET_INODE_INFO(i) ((struct sf_inode_info *) (i)->i_private) +# define SET_INODE_INFO(i, sf_i) (i)->i_private = sf_i +#else +/* vanilla kernel up to 2.6.18 */ +# define GET_INODE_INFO(i) ((struct sf_inode_info *) (i)->u.generic_ip) +# define SET_INODE_INFO(i, sf_i) (i)->u.generic_ip = sf_i +#endif + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) +# define GET_F_DENTRY(f) (f->f_path.dentry) +#else +# define GET_F_DENTRY(f) (f->f_dentry) +#endif + +#endif /* !GA_INCLUDED_SRC_linux_sharedfolders_vfsmod_h */ |