From 3c33d36759a316b8c118b77b3eed040425db8e0a Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Wed, 22 Oct 2014 22:55:02 +0200
Subject: working on ext2 and readdir syscall

---
 fs/ext2.c | 144 +++++++++++++++-----------------------------------------------
 1 file changed, 34 insertions(+), 110 deletions(-)

(limited to 'fs/ext2.c')

diff --git a/fs/ext2.c b/fs/ext2.c
index bdfb80b..c59f864 100644
--- a/fs/ext2.c
+++ b/fs/ext2.c
@@ -5,6 +5,7 @@
 
 #include "lib/int/stdint.h"
 #include "lib/logger/log.h"
+#include "fs.h"
 
 typedef struct ext2_superblock_struct
 {
@@ -194,142 +195,65 @@ int ext2_inode_content(char *ram,int inode_nr,uint8_t *ramdest,int max)
 
     }
 //  if(block>=12)panic(FOOLOS_MODULE_NAME,"such big files unsupported yet");
-
-
 }
 
-
-
-int ext2_read_root_dir(uint8_t *ram)
+int ext2_read_dir(uint8_t *ram, int inode_nr,fs_dirent *dirs,int max)
 {
-   
-    ext2_inode inode=ext2_get_inode(ram,2);
+
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"read_dir : max: %d",max);
+    ext2_inode inode=ext2_get_inode(ram,inode_nr);
 
     char buf[256];
     int block_size=1024;
-    uint8_t *ptr=ram+block_size*inode.direct_pointer[0]; //use other pointers in future!
+    uint8_t *ptr=ram+block_size*inode.direct_pointer[0]; //TODO: use other pointers in future!
 
     int pos=0;
+    int c=0;
+
     while(pos<inode.size_low) // use size high?
     {
+	if(c==max)break;
 
+	// read dir data
 	ext2_dir dir;
 	ram_read(ptr,&dir,sizeof(dir),1);
-	ptr+=sizeof(dir);
-
-	/*
-	printf("inode: %i\n",dir.inode);
-	printf("total size: %i\n",dir.size);
-	printf("length low/high: %i/%i\n\n",dir.name_length_low,dir.name_length_high);
-	*/
 
-//	int l=fread(buf,sizeof(char),dir.name_length_low,stdin);
-	ram_read(ptr,&buf,sizeof(char),dir.name_length_low); 
+	// read name
+	ptr+=sizeof(dir);
+	ram_read(ptr,&buf,sizeof(char),dir.name_length_low);
 	ptr+=dir.name_length_low;
-	
 	buf[dir.name_length_low]=0;
-	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d %s",dir.inode,buf);
+
+	// increment memory pointer and position
 	ptr+=dir.size-8-dir.name_length_low;
 	pos+=dir.size;
 
-    }
-
-}
-
-/*
-int main()
-{
-    ext2_superblock super;
-    ext2_superblock_ext super_ext;
-
-    printf("ext2 fools driver\n");
-    printf("reading superblock...\n\n");
-
-    fseek(stdin,1024,SEEK_SET);
-    fread(&super,sizeof(super),1,stdin);
+	// copy data over to dirs
+	dirs[c].inode=dir.inode;
 
-    printf("block size: %i\n",1024<<super.block_size);
-    printf("block count: %i\n",super.blocks_count);
-    printf("inode count: %i\n\n",super.inodes_count);
+	ext2_inode inode_current=ext2_get_inode(ram,dir.inode);
 
-    printf("blocks/group: %i\n",super.blocks_per_group);
-    printf("inodes/group: %i\n\n",super.inodes_per_group);
-
-    printf("signature: 0x%x\n",super.ext2_sig);
-    printf("fs state: %i\n",super.fs_state);
-    printf("version: %i.%i\n\n",super.version_major,super.version_minor);
-
-    if(super.version_major>=1)
-    {
-	printf("getting extended fields...\n\n");
-	fread(&super_ext,sizeof(super_ext),1,stdin);
-
-	printf("first (non reserved) inode: %i\n",super_ext.first_inode);
-	printf("inode size: %i\n\n",super_ext.size_inode);
-
-	printf("opt_features: %i\n",super_ext.features_opt);
-	printf("req_features: %i\n",super_ext.features_req);
-	printf("write_features: %i\n\n",super_ext.features_write);
-
-	printf("volume name: %s\n",super_ext.vol_name);
-	printf("mount path: %s\n\n",super_ext.last_path);
-
-    }
-
-    ext2_blockgroup_desc desc;
-    printf("getting block group descriptors...\n\n");
-    //TODO: only correct for 1024bytes/block. read more than one!!!
-    int block_size=1024;
-    int descriptor_start_block=2;
-    fseek(stdin,block_size*descriptor_start_block,SEEK_SET);
-
-    fread(&desc,sizeof(desc),1,stdin);
-    printf("block usage bitmap: 0x%x\n",desc.addr_block_bitmap);
-    printf("inode usage bitmap: 0x%x\n",desc.addr_inode_bitmap);
-    printf("inode table: 0x%x\n\n",desc.addr_inode_table);
-    printf("unalloc blocks: %i\n",desc.unalloc_blocks_count);
-    printf("unalloc inodes: %i\n",desc.unalloc_inodes_count);
-    printf("directories: %i\n\n",desc.dir_count);
-
-    //TODO: check for version >1
-    int inode_size=128;
-    ext2_inode inode;
-    printf("reading inode 2 (root dir)...\n\n");
-    fseek(stdin,block_size*desc.addr_inode_table,SEEK_SET);
-    fread(&inode,sizeof(inode),1,stdin);
+	if(inode_current.permissions&0x4000)
+	{
+		dirs[c].type=FS_FILE_TYPE_DIR;
+	}
+	else
+	{
+		dirs[c].type=FS_FILE_TYPE_FILE;
+	}
 
-    fread(&inode,sizeof(inode),1,stdin);
+	int i=0;
+	do{
+	    dirs[c].name[i]=buf[i];
+	    i++;
+	}while(buf[i-1]!=0);
 
-    printf("---------- root ---------\n");
-    printf("uid/gid: %i/%i\n",inode.user_id,inode.group_id);
-    printf("hardlinks: %i\n",inode.hardlink_count);
-    printf("size low/high: %i/%i\n",inode.size_low,inode.size_high);
-    printf("direct block pointer 0: %i\n\n",inode.direct_pointer[0]);
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"name: %s\n",dirs[c].name);
 
-    // read dir
-    char buf[256];
-    fseek(stdin,block_size*inode.direct_pointer[0],SEEK_SET);
+	c++;
 
-    int pos=0;
-    while(pos<inode.size_low)
-    {
-	ext2_dir dir;
-	fread(&dir,sizeof(dir),1,stdin);
-	printf("inode: %i\n",dir.inode);
-	printf("total size: %i\n",dir.size);
-	printf("length low/high: %i/%i\n\n",dir.name_length_low,dir.name_length_high);
-	int l=fread(buf,sizeof(char),dir.name_length_low,stdin);
-	buf[l]=0;
-	printf("name: %s\n\n",buf);
-	fseek(stdin,dir.size-8-dir.name_length_low,SEEK_CUR);
-	pos+=dir.size;
     }
 
-
-    puts("");
-    puts("");
+    return c;
 
 }
-*/
-
-
-- 
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