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Implement kos_fuse_getattr.

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This commit is contained in:
Ivan Baravy 2017-11-02 23:41:11 +03:00
parent 9c815e82ab
commit 8724153230
6 changed files with 172 additions and 74 deletions
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44
kocdecl.asm
View File

@ -1,7 +1,7 @@
format ELF
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2
__DEBUG_LEVEL__ = 1
include 'proc32.inc'
include 'struct.inc'
@ -26,6 +26,21 @@ ERROR_ACCESS_DENIED = 10
ERROR_DEVICE = 11
ERROR_OUT_OF_MEMORY = 12
struct FS_FUNCTIONS
Free dd ?
Size dd ?
ReadFile dd ?
ReadFolder dd ?
CreateFile dd ?
WriteFile dd ?
SetFileEnd dd ?
GetFileInfo dd ?
SetFileInfo dd ?
Run dd ?
Delete dd ?
CreateFolder dd ?
ends
purge section,mov,add,sub
section '.text' executable align 16
@ -88,6 +103,32 @@ kos_fuse_readdir:
ret
public kos_fuse_getattr
kos_fuse_getattr:
push ebx esi edi ebp
mov edx, sf70_params
mov dword[edx + 0x00], 5
mov dword[edx + 0x04], 0
mov dword[edx + 0x08], 0
mov dword[edx + 0x0c], 0
mov dword[edx + 0x10], sf70_buffer
mov eax, [esp + 0x14] ; path
inc eax ; skip '/'
mov [edx + 0x14], eax
mov ebp, [fs_struct]
mov ebx, sf70_params
mov esi, eax
push 0
call xfs_GetFileInfo
pop eax
pop ebp edi esi ebx
mov eax, sf70_buffer
ret
; in: eax = sector, ebx = buffer, ebp = pointer to PARTITION structure
fs_read32_sys:
pushad
@ -178,6 +219,7 @@ put_board:
ret
;include 'ext.inc'
include 'xfs.asm'

24
kocdecl.h
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@ -1,7 +1,29 @@
#ifndef KOS_H_INCLUDED
#define KOS_H_INCLUDED
#include <stdint.h>
struct bdfe {
uint32_t attr;
uint32_t enc;
uint32_t ctime;
uint32_t cdate;
uint32_t atime;
uint32_t adate;
uint32_t mtime;
uint32_t mdate;
uint64_t size;
char name[264];
};
#define KF_READONLY 0x01
#define KF_HIDDEN 0x02
#define KF_SYSTEM 0x04
#define KF_LABEL 0x08
#define KF_FOLDER 0x10
void kos_fuse_init(int fd);
char *kos_fuse_readdir(const char *path, off_t offset);
uint8_t *kos_fuse_readdir(const char *path, off_t offset);
void *kos_fuse_getattr(const char *path);
#endif

27
kofu.c
View File

@ -2,6 +2,7 @@
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
@ -23,13 +24,25 @@ int main(int argc, char **argv) {
//msg_not_xfs_partition db 'not xfs partition',0x0a
while(true) {
prompt();
scanf("%s", cmd_buf);
char *bdfe = kos_fuse_readdir("", 0);
uint32_t file_cnt = *(uint32_t*)(bdfe + 4);
bdfe += 0x20;
for (; file_cnt > 0; file_cnt--) {
printf("%s\n", bdfe + 0x28);
bdfe += 304;
fgets(cmd_buf, 4095, stdin);
int len = strlen(cmd_buf);
cmd_buf[len-1] = '\0';
// printf("'%s'\n", cmd_buf);
if (!strncmp(cmd_buf, "ls ", 3)) {
void *header = kos_fuse_readdir(cmd_buf + 4, 0);
uint32_t file_cnt = ((uint32_t*)header)[1];
printf("file_cnt: %u\n", file_cnt);
struct bdfe *kf = header + 0x20;
for (; file_cnt > 0; file_cnt--) {
printf("%s\n", kf->name);
kf++;
}
} else if (!strncmp(cmd_buf, "stat ", 5)) {
struct bdfe *kf = kos_fuse_getattr(cmd_buf + 5);
printf("attr: 0x%2.2x\n", kf->attr);
printf("size: %llu\n", kf->size);
} else {
printf("unknown command: %s\n", cmd_buf);
}
}

145
kofuse.c
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@ -6,104 +6,123 @@
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <assert.h>
#include "kocdecl.h"
static void bdfe_to_stat(struct bdfe *kf, struct stat *st) {
if (kf->attr & KF_FOLDER) {
st->st_mode = S_IFDIR | 0755;
st->st_nlink = 2;
} else {
st->st_mode = S_IFREG | 0444;
st->st_nlink = 1;
st->st_size = kf->size;
}
}
static void *hello_init(struct fuse_conn_info *conn,
struct fuse_config *cfg)
{
(void) conn;
cfg->kernel_cache = 1;
return NULL;
struct fuse_config *cfg) {
(void) conn;
cfg->kernel_cache = 1;
return NULL;
}
static int hello_getattr(const char *path, struct stat *stbuf,
struct fuse_file_info *fi)
{
(void) fi;
int res = 0;
struct fuse_file_info *fi) {
(void) fi;
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else if (strcmp(path+1, "blah") == 0) {
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = strlen("blah");
} else
res = -ENOENT;
// memset(stbuf, 0, sizeof(struct stat));
// if (strcmp(path, "/") == 0) {
// stbuf->st_mode = S_IFDIR | 0755;
// stbuf->st_nlink = 2;
// } else {
struct bdfe *kf = kos_fuse_getattr(path);
bdfe_to_stat(kf, stbuf);
// }
return res;
/*
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else if (strcmp(path+1, "blah") == 0) {
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = strlen("blah");
} else
res = -ENOENT;
*/
return res;
}
static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi,
enum fuse_readdir_flags flags)
{
(void) offset;
(void) fi;
(void) flags;
off_t offset, struct fuse_file_info *fi,
enum fuse_readdir_flags flags) {
(void) offset;
(void) fi;
(void) flags;
char *bdfe = kos_fuse_readdir(path, offset);
void *header = kos_fuse_readdir(path, offset);
// if (strcmp(path, "/") != 0)
// return -ENOENT;
uint32_t i = *(uint32_t*)(bdfe + 4);
// if (strcmp(path, "/") != 0)
// return -ENOENT;
uint32_t i = *(uint32_t*)(header + 4);
// int f = open("/tmp/t", O_RDWR | O_CREAT);
// write(f, bdfe, 1000);
// write(f, &i, 4);
// close(f);
bdfe += 0x20;
struct bdfe *kf = header + 0x20;
for(; i>0; i--) {
filler(buf, bdfe + 0x28, NULL, 0, 0);
bdfe += 304;
filler(buf, kf->name, NULL, 0, 0);
kf++;
}
return 0;
return 0;
}
static int hello_open(const char *path, struct fuse_file_info *fi)
{
if (strcmp(path+1, "blah") != 0)
return -ENOENT;
static int hello_open(const char *path, struct fuse_file_info *fi) {
if (strcmp(path+1, "blah") != 0)
return -ENOENT;
if ((fi->flags & O_ACCMODE) != O_RDONLY)
return -EACCES;
if ((fi->flags & O_ACCMODE) != O_RDONLY)
return -EACCES;
return 0;
return 0;
}
static int hello_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
size_t len;
(void) fi;
if(strcmp(path+1, "blah") != 0)
return -ENOENT;
struct fuse_file_info *fi) {
size_t len;
(void) fi;
if(strcmp(path+1, "blah") != 0)
return -ENOENT;
len = strlen("blah");
if (offset < len) {
if (offset + size > len)
size = len - offset;
memcpy(buf, "blah" + offset, size);
} else
size = 0;
len = strlen("blah");
if (offset < len) {
if (offset + size > len)
size = len - offset;
memcpy(buf, "blah" + offset, size);
} else
size = 0;
return size;
return size;
}
static struct fuse_operations hello_oper = {
.init = hello_init,
.getattr = hello_getattr,
.readdir = hello_readdir,
.open = hello_open,
.read = hello_read,
.init = hello_init,
.getattr = hello_getattr,
.readdir = hello_readdir,
.open = hello_open,
.read = hello_read,
};
int main(int argc, char *argv[])
{
int main(int argc, char *argv[]) {
if (argc != 3) {
printf("usage: kofuse dir img\n");
exit(1);
}
int fd = open(argv[2], O_RDONLY);
kos_fuse_init(fd);
return fuse_main(argc-1, argv, &hello_oper, NULL);
return fuse_main(argc-1, argv, &hello_oper, NULL);
}

4
makefile
View File

@ -13,10 +13,10 @@ kofuse: kofuse.o kocdecl.o
kocdecl.o: kocdecl.asm xfs.inc xfs.asm
$(FASM) $< $@
kofu.o: kofu.c
kofu.o: kofu.c kocdecl.h
$(CC) $(CFLAGS) -c $<
kofuse.o: kofuse.c
kofuse.o: kofuse.c kocdecl.h
$(CC) $(CFLAGS) `pkg-config fuse3 --cflags` -c $<
.PHONY: all clean

2
system.inc
View File

@ -15,3 +15,5 @@ O_LARGEFILE = 0x8000
STDIN = 0
STDOUT = 1
STDERR = 2
ENOENT = 2