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Diffstat (limited to 'filter.h')
| -rw-r--r-- | filter.h | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/filter.h b/filter.h new file mode 100644 index 000000000..6dc9a69dc --- /dev/null +++ b/filter.h @@ -0,0 +1,348 @@ +/*----------------------------------------------------------------------------*/ +/*filter.h*/ +/*----------------------------------------------------------------------------*/ +/*The definitions for the filtering translator*/ +/*----------------------------------------------------------------------------*/ +/*Based on the code of unionfs translator.*/ +/*----------------------------------------------------------------------------*/ +/*Copyright (C) 2001, 2002, 2005, 2008 Free Software Foundation, Inc. + Written by Sergiu Ivanov <unlimitedscolobb@gmail.com>. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of the + License, or * (at your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA.*/ +/*----------------------------------------------------------------------------*/ +#ifndef __FILTER_H__ +#define __FILTER_H__ +/*----------------------------------------------------------------------------*/ +#include <stddef.h> +#include <stdlib.h> +#include <cthreads.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/statfs.h> +#include <sys/time.h> +#include <hurd/ihash.h> +#include <hurd/iohelp.h> +/*----------------------------------------------------------------------------*/ +#include "node.h" +/*----------------------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------*/ +/*--------Macros--------------------------------------------------------------*/ +/*The inode for the root node*/ +#define FILTER_ROOT_INODE 1 +/*----------------------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------*/ +/*--------Global Variables----------------------------------------------------*/ +/*A mapped time value*/ +/*Required for a very fast access to time*/ +extern volatile struct mapped_time_value * maptime; +/*----------------------------------------------------------------------------*/ +/*A port to the underlying node*/ +extern mach_port_t underlying_node; +/*----------------------------------------------------------------------------*/ +/*The stat information about the underlying node*/ +extern io_statbuf_t underlying_node_stat; +/*----------------------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------*/ +/*--------Functions-----------------------------------------------------------*/ +/*Attempts to create a file named `name` in `dir` for `user` with mode `mode`*/ +error_t +netfs_attempt_create_file + ( + struct iouser * user, + struct node * dir, + char * name, + mode_t mode, + struct node ** node + ); +/*----------------------------------------------------------------------------*/ +/*Returns an error if the process of opening a file should not be allowed + to complete because of insufficient permissions*/ +error_t +netfs_check_open_permissions + ( + struct iouser * user, + struct node * np, + int flags, + int newnode + ); +/*----------------------------------------------------------------------------*/ +/*Attempts an utimes call for the user `cred` on node `node`*/ +error_t +netfs_attempt_utimes + ( + struct iouser * cred, + struct node * node, + struct timespec * atime, + struct timespec * mtime + ); +/*----------------------------------------------------------------------------*/ +/*Returns the valid access types for file `node` and user `cred`*/ +error_t +netfs_report_access + ( + struct iouser * cred, + struct node * np, + int * types + ); +/*----------------------------------------------------------------------------*/ +/*Validates the stat data for the node*/ +error_t +netfs_validate_stat + ( + struct node * np, + struct iouser * cred + ); +/*----------------------------------------------------------------------------*/ +/*Syncs `node` completely to disk*/ +error_t +netfs_attempt_sync + ( + struct iouser * cred, + struct node * node, + int wait + ); +/*----------------------------------------------------------------------------*/ +/*Fetches a directory*/ +error_t +netfs_get_dirents + ( + struct iouser * cred, + struct node * dir, + int first_entry, + int num_entries, + char ** data, + mach_msg_type_number_t * data_len, + vm_size_t max_data_len, + int * data_entries + ); +/*----------------------------------------------------------------------------*/ +/*Looks up `name` under `dir` for `user`*/ +error_t +netfs_attempt_lookup + ( + struct iouser * user, + struct node * dir, + char * name, + struct node ** node + ); +/*----------------------------------------------------------------------------*/ +/*Deletes `name` in `dir` for `user`*/ +error_t +netfs_attempt_unlink + ( + struct iouser * user, + struct node * dir, + char * name + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to rename `fromdir`/`fromname` to `todir`/`toname`*/ +error_t +netfs_attempt_rename + ( + struct iouser * user, + struct node * fromdir, + char * fromname, + struct node * todir, + char * toname, + int excl + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to create a new directory*/ +error_t +netfs_attempt_mkdir + ( + struct iouser * user, + struct node * dir, + char * name, + mode_t mode + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to remove directory `name` in `dir` for `user`*/ +error_t +netfs_attempt_rmdir + ( + struct iouser * user, + struct node * dir, + char * name + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to change the owner of `node` for user `cred` to `uid`:`gid`*/ +error_t +netfs_attempt_chown + ( + struct iouser * cred, + struct node * node, + uid_t uid, + uid_t gid + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to change the author of `node` to `author`*/ +error_t +netfs_attempt_chauthor + ( + struct iouser * cred, + struct node * node, + uid_t author + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to change the mode of `node` to `mode` for `cred`*/ +error_t +netfs_attempt_chmod + ( + struct iouser * user, + struct node * node, + mode_t mode + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to turn `node` into a symlink targetting `name`*/ +error_t +netfs_attempt_mksymlink + ( + struct iouser * cred, + struct node * node, + char * name + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to turn `node` into a device; type can be either S_IFBLK or S_IFCHR*/ +error_t +netfs_attempt_mkdev + ( + struct iouser * cred, + struct node * node, + mode_t type, + dev_t indexes + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to set the passive translator record for `file` passing `argz`*/ +error_t +netfs_set_translator + ( + struct iouser * cred, + struct node * node, + char * argz, + size_t arglen + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to call chflags for `node`*/ +error_t +netfs_attempt_chflags + ( + struct iouser * cred, + struct node * node, + int flags + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to set the size of file `node`*/ +error_t +netfs_attempt_set_size + ( + struct iouser * cred, + struct node * node, + loff_t size + ); +/*----------------------------------------------------------------------------*/ +/*Fetches the filesystem status information*/ +error_t +netfs_attempt_statfs + ( + struct iouser * cred, + struct node * node, + fsys_statfsbuf_t * st + ); +/*----------------------------------------------------------------------------*/ +/*Syncs the filesystem*/ +error_t +netfs_attempt_syncfs + ( + struct iouser * cred, + int wait + ); +/*----------------------------------------------------------------------------*/ +/*Creates a link in `dir` with `name` to `file`*/ +error_t +netfs_attempt_link + ( + struct iouser * user, + struct node * dir, + struct node * file, + char * name, + int excl + ); +/*----------------------------------------------------------------------------*/ +/*Attempts to create an anonymous file related to `dir` with `mode`*/ +error_t +netfs_attempt_mkfile + ( + struct iouser * user, + struct node * dir, + mode_t mode, + struct node ** node + ); +/*----------------------------------------------------------------------------*/ +/*Reads the contents of symlink `node` into `buf`*/ +error_t +netfs_attempt_readlink + ( + struct iouser * user, + struct node * node, + char * buf + ); +/*----------------------------------------------------------------------------*/ +/*Reads from file `node` up to `len` bytes from `offset` into `data`*/ +error_t +netfs_attempt_read + ( + struct iouser * cred, + struct node * np, + loff_t offset, + size_t * len, + void * data + ); +/*----------------------------------------------------------------------------*/ +/*Writes to file `node` up to `len` bytes from offset from `data`*/ +error_t +netfs_attempt_write + ( + struct iouser * cred, + struct node * node, + loff_t offset, + size_t * len, + void * data + ); +/*----------------------------------------------------------------------------*/ +/*Frees all storage associated with the node*/ +void +netfs_node_norefs + ( + struct node * np + ); +/*----------------------------------------------------------------------------*/ +/*Implements file_get_translator_cntl as described in <hurd/fs.defs> + (according to diskfs_S_file_get_translator_cntl)*/ +kern_return_t +netfs_S_file_get_translator_cntl + ( + struct protid * user, + mach_port_t * cntl, + mach_msg_type_name_t * cntltype + ); +/*----------------------------------------------------------------------------*/ +#endif /*__FILTER_H__*/ |