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fixed several bugs

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This commit is contained in:
Victor 2023-11-11 16:08:35 -08:00
parent 23c5b4da6f
commit 1d567ff487
2 changed files with 37 additions and 6 deletions
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13
include/fs.h
View File

@ -145,7 +145,7 @@ public:
u_int64_t freeBlockNum = 0;
disk.rawdisk_read(freeListHead, buffer, sizeof(buffer));
for (int i = 8; i < 264; i++){
if(buffer[i] != 255){
if((i < 263 && buffer[i] != -1) || (i == 263 && buffer[i] != 127)){
int j = 0;
for (j = 0; j < 8; j++){
if ((buffer[i]&(1<<j)) == 0){
@ -153,18 +153,22 @@ public:
break;
}
}
if (j < 8){
freeBlockNum = freeListHead + ((i-8)*8 + j + 1)*IO_BLOCK_SIZE;
break;
}
}
}
disk.rawdisk_write(freeListHead, buffer, sizeof(buffer));
bool notFull = false;
for (int i = 8; i < 264; i++){
if((i < 263 && buffer[i] != 255) || (i == 263 && buffer[i] != 127)){
if((i < 263 && buffer[i] != -1) || (i == 263 && buffer[i] != 127)){
notFull = true;
break;
}
}
if (!notFull){
printf("HEADER REMOVAL DETECTED %llu %llu\n", freeListHead, freeBlockNum);
u_int64_t next_header = read_byte_at(0, buffer);
SuperBlock::writeFreeListHead(disk, next_header);
}
@ -274,7 +278,7 @@ public:
}
}
u_int64_t inBlockPos = (freeBlockNum-freeBlockHead)/IO_BLOCK_SIZE-1;
buffer[8+inBlockPos/8] |= (1<<(inBlockPos%8));
buffer[8+inBlockPos/8] &= (-1)^(1<<(inBlockPos%8));
// if its bitmap was 0, add it back to the list head
if(!notEmpty){
@ -367,7 +371,7 @@ public:
}
// deallocate 1 datablock from the end of the file
void datablock_deallocate(RawDisk &disk){
u_int64_t datablock_deallocate(RawDisk &disk){
// find the last datablock and remove it from inode (triple->direct)
u_int64_t freeBlockNum = 0;
freeBlockNum = deallo_triple_indirect(disk, triple_indirect);
@ -390,6 +394,7 @@ public:
// add it back to freeBlocklist
datablock_deallocate_in_list(freeBlockNum, disk);
inode_save(disk);
return freeBlockNum;
}
};

28
test/layer1_API.cpp
View File

@ -46,7 +46,7 @@ int main(int argc, char *argv[]) {
H->rawdisk_read((MAX_BLOCKNUM - 2048*8) * SECTOR_SIZE, buffer, sizeof(buffer));
t = 0;
for (int j = 0; j < 8; j++)
t |= ((u_int64_t)(char)buffer[j]) << (8 * j);
t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
assert(t == (MAX_BLOCKNUM)*SECTOR_SIZE);
//initialize
@ -76,6 +76,32 @@ int main(int argc, char *argv[]) {
for(int i=0;i<20;i++){
printf(" %d", inode_list[i]);
}
printf("}\n");
INode inode_inside[10];
for(int i=0;i<10;i++){
inode_inside[i].inode_construct(inode_list[i],*H);
printf("%dth data block starting addres: ", i);
for(int j=0;j<6;j++){
printf("%d," ,inode_inside[i].datablock_allocate(*H));
}
printf("\n");
}
for(int i=0;i<10;i++){
printf("%dth data block free addres: ", i);
for(int j=0;j<3;j++){
printf("%d," ,inode_inside[i].datablock_deallocate(*H));
}
printf("\n");
}
for(int i=0;i<10;i++){
printf("%dth data block allocate again addres: ", i);
for(int j=0;j<3;j++){
printf("%d," ,inode_inside[i].datablock_allocate(*H));
}
printf("\n");
}
printf("}\n");
delete H; // Delete the RawDisk object