1、使用ssh客户端,登陆ubuntu
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1
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ssh
-p 2206 root@127.0.0.1
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2、下载fuse源码,进行编译,安装(当前工作目录为~)
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wget https:
//github
.com
/libfuse/libfuse/releases/download/fuse-3
.0.0rc3
/fuse-3
.0.0rc3.
tar
.gz
tar
xvf fuse-3.0.0rc3.
tar
.gz
cd
fuse-3.0.0rc3/
.
/configure
make
-j8
make
install
depmod
modprobe fuse
|
3、测试example\hello_ll是否能正常工作
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cd
example/
.
/hello_ll
--help
.
/hello_ll
/mnt
mount
cd
/mnt
ls
cat
hello
cd
umount
/mnt
|
-
针对example\hello_ll.c,进行改动测试:
1、在根目录下多创建一个文件出来,节点号定为5,名称为frombyte,内容为文本"http://www.datahf.net"
改动如下:
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/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
/** @file
*
* minimal example filesystem using low-level API
*
* Compile with:
*
* gcc -Wall hello_ll.c `pkg-config fuse3 --cflags --libs` -o hello_ll
*
* ## Source code ##
* \include hello_ll.c
*/
#define FUSE_USE_VERSION 30
#include <config.h>
#include <fuse_lowlevel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
static
const
char
*hello_str =
"Hello World!\n"
;
static
const
char
*hello_name =
"hello"
;
//change1 #0
static
const
char
*inode5_str =
"http://www.datahf.net!\n"
;
static
const
char
*inode5_name =
"frombyte"
;
//change end
static
int
hello_stat(fuse_ino_t ino,
struct
stat *stbuf)
{
stbuf->st_ino = ino;
switch
(ino) {
case
1:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
break
;
case
2:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(hello_str);
break
;
//change1 #1
case
5:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(inode5_str);
break
;
//change1 end
default
:
return
-1;
}
return
0;
}
static
void
hello_ll_getattr(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
struct
stat stbuf;
(
void
) fi;
memset
(&stbuf, 0,
sizeof
(stbuf));
if
(hello_stat(ino, &stbuf) == -1)
fuse_reply_err(req, ENOENT);
else
fuse_reply_attr(req, &stbuf, 1.0);
}
static
void
hello_ll_lookup(fuse_req_t req, fuse_ino_t parent,
const
char
*name)
{
struct
fuse_entry_param e;
//change1 #2
/*
if (parent != 1 || strcmp(name, hello_name) != 0)
fuse_reply_err(req, ENOENT);
else {
memset(&e, 0, sizeof(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}*/
if
(parent != 1)
fuse_reply_err(req, ENOENT);
else
if
(
strcmp
(name, hello_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
if
(
strcmp
(name, inode5_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 5;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
fuse_reply_err(req, ENOENT);
//change1 end
}
struct
dirbuf {
char
*p;
size_t
size;
};
static
void
dirbuf_add(fuse_req_t req,
struct
dirbuf *b,
const
char
*name,
fuse_ino_t ino)
{
struct
stat stbuf;
size_t
oldsize = b->size;
b->size += fuse_add_direntry(req, NULL, 0, name, NULL, 0);
b->p = (
char
*)
realloc
(b->p, b->size);
memset
(&stbuf, 0,
sizeof
(stbuf));
stbuf.st_ino = ino;
fuse_add_direntry(req, b->p + oldsize, b->size - oldsize, name, &stbuf,
b->size);
}
#define min(x, y) ((x) < (y) ? (x) : (y))
static
int
reply_buf_limited(fuse_req_t req,
const
char
*buf,
size_t
bufsize,
off_t off,
size_t
maxsize)
{
if
(off < bufsize)
return
fuse_reply_buf(req, buf + off,
min(bufsize - off, maxsize));
else
return
fuse_reply_buf(req, NULL, 0);
}
static
void
hello_ll_readdir(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
if
(ino != 1)
fuse_reply_err(req, ENOTDIR);
else
{
struct
dirbuf b;
memset
(&b, 0,
sizeof
(b));
dirbuf_add(req, &b,
"."
, 1);
dirbuf_add(req, &b,
".."
, 1);
dirbuf_add(req, &b, hello_name, 2);
//change1
dirbuf_add(req, &b, inode5_name, 5);
//end
reply_buf_limited(req, b.p, b.size, off, size);
free
(b.p);
}
}
static
void
hello_ll_open(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
//change1
//if (ino != 2)
if
( (ino !=2) && (ino != 5) )
//end
fuse_reply_err(req, EISDIR);
else
if
((fi->flags & 3) != O_RDONLY)
fuse_reply_err(req, EACCES);
else
fuse_reply_open(req, fi);
}
static
void
hello_ll_read(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
//change1
//assert(ino == 2);
//reply_buf_limited(req, hello_str, strlen(hello_str), off, size);
switch
(ino) {
case
2:
reply_buf_limited(req, hello_str,
strlen
(hello_str), off, size);
break
;
case
5:
reply_buf_limited(req, inode5_str,
strlen
(inode5_str), off, size);
break
;
default
:
;
}
//end
}
static
struct
fuse_lowlevel_ops hello_ll_oper = {
.lookup = hello_ll_lookup,
.getattr = hello_ll_getattr,
.readdir = hello_ll_readdir,
.open = hello_ll_open,
.read = hello_ll_read,
};
int
main(
int
argc,
char
*argv[])
{
struct
fuse_args args = FUSE_ARGS_INIT(argc, argv);
struct
fuse_session *se;
struct
fuse_cmdline_opts opts;
int
ret = -1;
if
(fuse_parse_cmdline(&args, &opts) != 0)
return
1;
if
(opts.show_help) {
printf
(
"usage: %s [options] <mountpoint>\n\n"
, argv[0]);
fuse_cmdline_help();
fuse_lowlevel_help();
ret = 0;
goto
err_out1;
}
else
if
(opts.show_version) {
printf
(
"FUSE library version %s\n"
, fuse_pkgversion());
fuse_lowlevel_version();
ret = 0;
goto
err_out1;
}
se = fuse_session_new(&args, &hello_ll_oper,
sizeof
(hello_ll_oper), NULL);
if
(se == NULL)
goto
err_out1;
if
(fuse_set_signal_handlers(se) != 0)
goto
err_out2;
if
(fuse_session_mount(se, opts.mountpoint) != 0)
goto
err_out3;
fuse_daemonize(opts.foreground);
/* Block until ctrl+c or fusermount -u */
if
(opts.singlethread)
ret = fuse_session_loop(se);
else
ret = fuse_session_loop_mt(se, opts.clone_fd);
fuse_session_unmount(se);
err_out3:
fuse_remove_signal_handlers(se);
err_out2:
fuse_session_destroy(se);
err_out1:
free
(opts.mountpoint);
fuse_opt_free_args(&args);
return
ret ? 1 : 0;
}
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结果测试:
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cd
~
/fuse-3
.0.0rc3
/example/
make
.
/hello_ll
/mnt
ll -i
/mnt
cat
/mnt/frombyte
umount
/mnt
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2、增加目录、增加二进制文件测试:
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|
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
/** @file
*
* minimal example filesystem using low-level API
*
* Compile with:
*
* gcc -Wall hello_ll.c `pkg-config fuse3 --cflags --libs` -o hello_ll
*
* ## Source code ##
* \include hello_ll.c
*/
#define FUSE_USE_VERSION 30
#include <config.h>
#include <fuse_lowlevel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
static
const
char
*hello_str =
"Hello World!\n"
;
static
const
char
*hello_name =
"hello"
;
//change1 #0
static
const
char
*inode5_str =
"http://www.datahf.net!\n"
;
static
const
char
*inode5_name =
"frombyte"
;
static
const
char
*inode3_name =
"frombyte.dir"
;
static
const
char
*inode6_name =
"inode6.img"
;
//change end
static
int
hello_stat(fuse_ino_t ino,
struct
stat *stbuf)
{
stbuf->st_ino = ino;
switch
(ino) {
case
1:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 3;
break
;
case
2:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(hello_str);
break
;
//change1 #1
case
3:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
break
;
case
5:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(inode5_str);
break
;
case
6:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = 1024 * 1024 * 1024;
break
;
//change1 end
default
:
return
-1;
}
return
0;
}
static
void
hello_ll_getattr(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
struct
stat stbuf;
(
void
) fi;
memset
(&stbuf, 0,
sizeof
(stbuf));
if
(hello_stat(ino, &stbuf) == -1)
fuse_reply_err(req, ENOENT);
else
fuse_reply_attr(req, &stbuf, 1.0);
}
static
void
hello_ll_lookup(fuse_req_t req, fuse_ino_t parent,
const
char
*name)
{
struct
fuse_entry_param e;
//change1 #2
/*
if (parent != 1 || strcmp(name, hello_name) != 0)
fuse_reply_err(req, ENOENT);
else {
memset(&e, 0, sizeof(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}*/
switch
(parent) {
case
1:
if
(
strcmp
(name, hello_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
if
(
strcmp
(name, inode3_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 3;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
fuse_reply_err(req, ENOENT);
break
;
case
3:
if
(
strcmp
(name, inode5_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 5;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
if
(
strcmp
(name, inode6_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 6;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
fuse_reply_err(req, ENOENT);
break
;
default
:
fuse_reply_err(req, ENOENT);
break
;
}
//change1 end
}
struct
dirbuf {
char
*p;
size_t
size;
};
static
void
dirbuf_add(fuse_req_t req,
struct
dirbuf *b,
const
char
*name,
fuse_ino_t ino)
{
struct
stat stbuf;
size_t
oldsize = b->size;
b->size += fuse_add_direntry(req, NULL, 0, name, NULL, 0);
b->p = (
char
*)
realloc
(b->p, b->size);
memset
(&stbuf, 0,
sizeof
(stbuf));
stbuf.st_ino = ino;
fuse_add_direntry(req, b->p + oldsize, b->size - oldsize, name, &stbuf,
b->size);
}
#define min(x, y) ((x) < (y) ? (x) : (y))
static
int
reply_buf_limited(fuse_req_t req,
const
char
*buf,
size_t
bufsize,
off_t off,
size_t
maxsize)
{
if
(off < bufsize)
return
fuse_reply_buf(req, buf + off,
min(bufsize - off, maxsize));
else
return
fuse_reply_buf(req, NULL, 0);
}
static
void
hello_ll_readdir(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
/*
if (ino != 1)
fuse_reply_err(req, ENOTDIR);
else {*/
struct
dirbuf b;
switch
(ino) {
case
1:
memset
(&b, 0,
sizeof
(b));
dirbuf_add(req, &b,
"."
, 1);
dirbuf_add(req, &b,
".."
, 1);
dirbuf_add(req, &b, hello_name, 2);
//change1
dirbuf_add(req, &b, inode3_name, 3);
//end
reply_buf_limited(req, b.p, b.size, off, size);
free
(b.p);
break
;
case
3:
memset
(&b, 0,
sizeof
(b));
dirbuf_add(req, &b,
"."
, 3);
dirbuf_add(req, &b,
".."
, 1);
dirbuf_add(req, &b, inode5_name, 5);
dirbuf_add(req, &b, inode6_name, 6);
reply_buf_limited(req, b.p, b.size, off, size);
free
(b.p);
break
;
default
:
fuse_reply_err(req, ENOTDIR);
break
;
}
//}
}
static
void
hello_ll_open(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
//change1
//if (ino != 2)
switch
(ino)
{
case
2:
case
5:
case
6:
if
((fi->flags & 3) != O_RDONLY)
fuse_reply_err(req, EACCES);
else
fuse_reply_open(req, fi);
break
;
default
:
fuse_reply_err(req, EISDIR);
break
;
}
}
static
void
hello_ll_read(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
char
* tbuf;
//change1
//assert(ino == 2);
//reply_buf_limited(req, hello_str, strlen(hello_str), off, size);
switch
(ino) {
case
2:
reply_buf_limited(req, hello_str,
strlen
(hello_str), off, size);
break
;
case
5:
reply_buf_limited(req, inode5_str,
strlen
(inode5_str), off, size);
break
;
case
6:
tbuf = (
char
*)
malloc
(size);
for
(
int
i = 0; i < size /
sizeof
(
int
); i++)
((
int
*)tbuf)[i] = size;
fuse_reply_buf(req, tbuf,size);
free
(tbuf);
default
:
;
}
//end
}
static
struct
fuse_lowlevel_ops hello_ll_oper = {
.lookup = hello_ll_lookup,
.getattr = hello_ll_getattr,
.readdir = hello_ll_readdir,
.open = hello_ll_open,
.read = hello_ll_read,
};
int
main(
int
argc,
char
*argv[])
{
struct
fuse_args args = FUSE_ARGS_INIT(argc, argv);
struct
fuse_session *se;
struct
fuse_cmdline_opts opts;
int
ret = -1;
if
(fuse_parse_cmdline(&args, &opts) != 0)
return
1;
if
(opts.show_help) {
printf
(
"usage: %s [options] <mountpoint>\n\n"
, argv[0]);
fuse_cmdline_help();
fuse_lowlevel_help();
ret = 0;
goto
err_out1;
}
else
if
(opts.show_version) {
printf
(
"FUSE library version %s\n"
, fuse_pkgversion());
fuse_lowlevel_version();
ret = 0;
goto
err_out1;
}
se = fuse_session_new(&args, &hello_ll_oper,
sizeof
(hello_ll_oper), NULL);
if
(se == NULL)
goto
err_out1;
if
(fuse_set_signal_handlers(se) != 0)
goto
err_out2;
if
(fuse_session_mount(se, opts.mountpoint) != 0)
goto
err_out3;
fuse_daemonize(opts.foreground);
/* Block until ctrl+c or fusermount -u */
if
(opts.singlethread)
ret = fuse_session_loop(se);
else
ret = fuse_session_loop_mt(se, opts.clone_fd);
fuse_session_unmount(se);
err_out3:
fuse_remove_signal_handlers(se);
err_out2:
fuse_session_destroy(se);
err_out1:
free
(opts.mountpoint);
fuse_opt_free_args(&args);
return
ret ? 1 : 0;
}
|
3、fuse的根节点号是1,在源码中是以常量的方式定义的,本来想改成变量,估计工作量和稳定性会有麻烦,变通处理吧。
4、修改代码,实现自定义文件生成
|
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|
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
/** @file
*
* minimal example filesystem using low-level API
*
* Compile with:
*
* gcc -Wall hello_ll.c `pkg-config fuse3 --cflags --libs` -o hello_ll
*
* ## Source code ##
* \include hello_ll.c
*/
/*change2:
定义一个idx文件,格式为typedef struct Str_idx {
int low_off;
short hige_off;
short fileid;
}str_idx;
按每8字节一个索引的方式组合某个镜像文件,文件ID为0表示自由,用字符'F'填充。
文件ID为1,表示使用当前目录下的$MFT文件做为数据源进行加工。
测试代码,至少还需补全:
1、配置文件(文件大小、源文件路径等)的参数指定
2、idx结构的准确大小(int,short和机器位长有关系,需修改为与机器位长无关的数据类型)
3、排错:文件打不开
4、排错:文件大小与idx不符
5、排错:文件溢出处理
6、修改缓冲机制,不能先把源文件全读到内存,需要建立缓冲机制,应对读函数,或者简单地用fopen加缓冲处理。
by www.datahf.net 张宇
*/
#define FUSE_USE_VERSION 30
#include <config.h>
#include <fuse_lowlevel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
static
const
char
*hello_str =
"Hello World!\n"
;
static
const
char
*hello_name =
"hello"
;
//change1 #0
static
const
char
*inode5_str =
"http://www.datahf.net!\n"
;
static
const
char
*inode5_name =
"frombyte"
;
static
const
char
*inode3_name =
"frombyte.dir"
;
static
const
char
*inode6_name =
"inode6.img"
;
unsigned
char
*databuf;
#define INODE6_SIZE (1024*1024*4)
//change end
static
int
hello_stat(fuse_ino_t ino,
struct
stat *stbuf)
{
stbuf->st_ino = ino;
switch
(ino) {
case
1:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 3;
break
;
case
2:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(hello_str);
break
;
//change1 #1
case
3:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
break
;
case
5:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size =
strlen
(inode5_str);
break
;
case
6:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = INODE6_SIZE;
break
;
//change1 end
default
:
return
-1;
}
return
0;
}
static
void
hello_ll_getattr(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
struct
stat stbuf;
(
void
) fi;
memset
(&stbuf, 0,
sizeof
(stbuf));
if
(hello_stat(ino, &stbuf) == -1)
fuse_reply_err(req, ENOENT);
else
fuse_reply_attr(req, &stbuf, 1.0);
}
static
void
hello_ll_lookup(fuse_req_t req, fuse_ino_t parent,
const
char
*name)
{
struct
fuse_entry_param e;
//change1 #2
/*
if (parent != 1 || strcmp(name, hello_name) != 0)
fuse_reply_err(req, ENOENT);
else {
memset(&e, 0, sizeof(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}*/
switch
(parent) {
case
1:
if
(
strcmp
(name, hello_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 2;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
if
(
strcmp
(name, inode3_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 3;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
fuse_reply_err(req, ENOENT);
break
;
case
3:
if
(
strcmp
(name, inode5_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 5;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
if
(
strcmp
(name, inode6_name) == 0){
memset
(&e, 0,
sizeof
(e));
e.ino = 6;
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
hello_stat(e.ino, &e.attr);
fuse_reply_entry(req, &e);
}
else
fuse_reply_err(req, ENOENT);
break
;
default
:
fuse_reply_err(req, ENOENT);
break
;
}
//change1 end
}
struct
dirbuf {
char
*p;
size_t
size;
};
//change2
typedef
struct
Str_idx {
int
low_off;
short
hige_off;
short
fileid;
}str_idx;
static
void
dirbuf_add(fuse_req_t req,
struct
dirbuf *b,
const
char
*name,
fuse_ino_t ino)
{
struct
stat stbuf;
size_t
oldsize = b->size;
b->size += fuse_add_direntry(req, NULL, 0, name, NULL, 0);
b->p = (
char
*)
realloc
(b->p, b->size);
memset
(&stbuf, 0,
sizeof
(stbuf));
stbuf.st_ino = ino;
fuse_add_direntry(req, b->p + oldsize, b->size - oldsize, name, &stbuf,
b->size);
}
#define min(x, y) ((x) < (y) ? (x) : (y))
static
int
reply_buf_limited(fuse_req_t req,
const
char
*buf,
size_t
bufsize,
off_t off,
size_t
maxsize)
{
if
(off < bufsize)
return
fuse_reply_buf(req, buf + off,
min(bufsize - off, maxsize));
else
return
fuse_reply_buf(req, NULL, 0);
}
static
void
hello_ll_readdir(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
/*
if (ino != 1)
fuse_reply_err(req, ENOTDIR);
else {*/
struct
dirbuf b;
switch
(ino) {
case
1:
memset
(&b, 0,
sizeof
(b));
dirbuf_add(req, &b,
"."
, 1);
dirbuf_add(req, &b,
".."
, 1);
dirbuf_add(req, &b, hello_name, 2);
//change1
dirbuf_add(req, &b, inode3_name, 3);
//end
reply_buf_limited(req, b.p, b.size, off, size);
free
(b.p);
break
;
case
3:
memset
(&b, 0,
sizeof
(b));
dirbuf_add(req, &b,
"."
, 3);
dirbuf_add(req, &b,
".."
, 1);
dirbuf_add(req, &b, inode5_name, 5);
dirbuf_add(req, &b, inode6_name, 6);
reply_buf_limited(req, b.p, b.size, off, size);
free
(b.p);
break
;
default
:
fuse_reply_err(req, ENOTDIR);
break
;
}
//}
}
static
void
hello_ll_open(fuse_req_t req, fuse_ino_t ino,
struct
fuse_file_info *fi)
{
//change1
//if (ino != 2)
switch
(ino)
{
case
2:
case
5:
case
6:
if
((fi->flags & 3) != O_RDONLY)
fuse_reply_err(req, EACCES);
else
fuse_reply_open(req, fi);
break
;
default
:
fuse_reply_err(req, EISDIR);
break
;
}
}
static
void
hello_ll_read(fuse_req_t req, fuse_ino_t ino,
size_t
size,
off_t off,
struct
fuse_file_info *fi)
{
(
void
) fi;
//change1
//assert(ino == 2);
//reply_buf_limited(req, hello_str, strlen(hello_str), off, size);
switch
(ino) {
case
2:
reply_buf_limited(req, hello_str,
strlen
(hello_str), off, size);
break
;
case
5:
reply_buf_limited(req, inode5_str,
strlen
(inode5_str), off, size);
break
;
case
6:
fuse_reply_buf(req, databuf + off,size);
default
:
;
}
//end
}
static
struct
fuse_lowlevel_ops hello_ll_oper = {
.lookup = hello_ll_lookup,
.getattr = hello_ll_getattr,
.readdir = hello_ll_readdir,
.open = hello_ll_open,
.read = hello_ll_read,
};
int
main(
int
argc,
char
*argv[])
{
struct
fuse_args args = FUSE_ARGS_INIT(argc, argv);
struct
fuse_session *se;
struct
fuse_cmdline_opts opts;
int
ret = -1;
if
(fuse_parse_cmdline(&args, &opts) != 0)
return
1;
if
(opts.show_help) {
printf
(
"usage: %s [options] <mountpoint>\n\n"
, argv[0]);
fuse_cmdline_help();
fuse_lowlevel_help();
ret = 0;
goto
err_out1;
}
else
if
(opts.show_version) {
printf
(
"FUSE library version %s\n"
, fuse_pkgversion());
fuse_lowlevel_version();
ret = 0;
goto
err_out1;
}
//change2
FILE
*f_idx,*f_img;
f_idx =
fopen
(
"./1.idx"
,
"rb"
);
f_img =
fopen
(
"./$MFT"
,
"rb"
);
if
( (f_idx == -1) || (f_img == -1) )
{
printf
(
"f_idx is %d\nf_img is %d\n"
,f_idx,f_img);
goto
err_out1;
}
size_t
s_idx,s_img;
s_idx = 512;
unsigned
char
idx_buf[512];
databuf = NULL;
databuf = (
char
*)
malloc
(INODE6_SIZE);
fread
(idx_buf,512,1,f_idx);
int
i=0;
struct
Str_idx * tidx;
tidx = (
struct
Str_idx*) idx_buf;
for
(i=0;i<4;i++)
{
if
(tidx[i].fileid == 0)
memset
(databuf+ i * 1024 * 1024,
'F'
,1024*1024);
else
if
(tidx[i].fileid == 1)
{
fseek
(f_img,
tidx[i].low_off * 1024 * 1024 + tidx[i].hige_off * 1024 * 1024,
SEEK_SET);
fread
(databuf + i * 1024 * 1024,1024*1024,1,f_img);
}
else
;
printf
(
"#i:%d,%d,%d\n"
,tidx[i].low_off,tidx[i].hige_off,tidx[i].fileid);
}
se = fuse_session_new(&args, &hello_ll_oper,
sizeof
(hello_ll_oper), NULL);
if
(se == NULL)
goto
err_out1;
if
(fuse_set_signal_handlers(se) != 0)
goto
err_out2;
if
(fuse_session_mount(se, opts.mountpoint) != 0)
goto
err_out3;
fuse_daemonize(opts.foreground);
/* Block until ctrl+c or fusermount -u */
if
(opts.singlethread)
ret = fuse_session_loop(se);
else
ret = fuse_session_loop_mt(se, opts.clone_fd);
fuse_session_unmount(se);
err_out3:
fuse_remove_signal_handlers(se);
err_out2:
fuse_session_destroy(se);
err_out1:
free
(opts.mountpoint);
fuse_opt_free_args(&args);
return
ret ? 1 : 0;
}
|
待续
本文转自 张宇 51CTO博客,原文链接:http://blog.51cto.com/zhangyu/1881032,如需转载请自行联系原作者