pfschecker.c
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/**************************************************************************
* *
* Copyright (C) 1995, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include "osint.h"
#include "controller.h"
s32 corrupted_init(OSPfs *, __OSInodeCache *);
s32 corrupted(OSPfs *, __OSInodeUnit, __OSInodeCache *);
#define CHECK_IPAGE(p) (((p).ipage >= pfs->inode_start_page) && \
((p).inode_t.bank < pfs->banks) && \
((p).inode_t.page >= 0x01) && \
((p).inode_t.page < 0x80))
s32
osPfsChecker(OSPfs *pfs)
{
int j;
s32 ret;
__OSInodeUnit next_page;
__OSInode checked_inode;
__OSInode tmp_inode;
__OSDir tmp_dir;
__OSInodeUnit file_next_node[16];
__OSInodeCache cache;
int fixed = 0;
u8 bank, oldbank=254;
#ifdef _PFS_1M_EXTENSION
u8 startbank;
#endif
s32 cc, cl;
int offset;
/* check status */
ret = __osCheckId(pfs);
if (ret == PFS_ERR_NEW_PACK)
ret = __osGetId(pfs);
if (ret)
return(ret);
#ifdef _PFS_1M_EXTENSION
if (pfs->banks < PFS_ID_BANK_1M) {
startbank = PFS_ID_BANK_256K;
} else {
startbank = PFS_ID_BANK_1M;
}
#endif
/*
* loop through all files to make sure that there are no
* file's start pages have been marked NOT_USED.
*/
if ((ret = corrupted_init(pfs, &cache)) != 0) return(ret);
for (j = 0; j < pfs->dir_size; j++) {
if ((ret = __osContRamRead(pfs->queue, pfs->channel,
(u16)(pfs->dir_table + j),
(u8 *)&tmp_dir)) != 0){
return(ret);
}
if ((tmp_dir.company_code != 0) || (tmp_dir.game_code != 0)) {
if ((tmp_dir.company_code == 0) || (tmp_dir.game_code == 0)) {
cc = -1;
} else {
/* file exist */
next_page = tmp_dir.start_page;
/* dir is valid */
cl = cc = 0;
bank = 255;
while(CHECK_IPAGE(next_page)){
if (bank != next_page.inode_t.bank){
bank = next_page.inode_t.bank;
if (oldbank != bank) {
ret = __osPfsRWInode(pfs, &tmp_inode, PFS_READ, bank);
oldbank = bank;
}
if ((ret != 0) && (ret != PFS_ERR_INCONSISTENT)){
return(ret);
}
}
if ((cc = corrupted(pfs, next_page, &cache) - cl) != 0){
break;
}
cl = 1;
next_page = tmp_inode.inode_page[next_page.inode_t.page];
}
}
if ((cc != 0) || (next_page.ipage != PFS_EOF)){
/* corrupted */
bzero(&tmp_dir, sizeof(__OSDir));
#ifdef _PFS_1M_EXTENSION
if ((ret = __osPfsSelectIdBank(pfs)) != 0) return(ret);
#else
if (pfs->activebank != 0) {
if ((ret = __osPfsSelectBank(pfs, 0)) != 0)
return(ret);
}
#endif
if ((ret = __osContRamWrite(pfs->queue, pfs->channel,
(u16)(pfs->dir_table + j),
(u8 *)&tmp_dir, 0)) != 0){
return(ret);
}
/* free inode pages */
fixed++;
}
}
}
/*
* return all pages that are not in any file back to NOT_USED.
*/
/* BY YASU */
/* Get inode start page */
for (j = 0; j < pfs->dir_size; j++) {
if ((ret = __osContRamRead(pfs->queue, pfs->channel,
(u16)(pfs->dir_table +j),
(u8 *)&tmp_dir)) != 0)
return(ret);
/* Check if file exists */
if ((tmp_dir.company_code != 0) && (tmp_dir.game_code != 0) &&
(tmp_dir.start_page.ipage >= (u16)pfs->inode_start_page)) {
file_next_node[j].ipage = tmp_dir.start_page.ipage;
} else {
file_next_node[j].ipage = 0;
}
}
/* Check all */
#ifdef _PFS_1M_EXTENSION
for(bank = startbank; bank < pfs->banks; bank++) {
#else
for(bank = 0; bank < pfs->banks; bank++) {
#endif
/* load inode */
ret =__osPfsRWInode(pfs, &tmp_inode, PFS_READ, bank);
if ((ret != 0) && (ret != PFS_ERR_INCONSISTENT))
return(ret);
/* setup default inode structure */
#ifdef _PFS_1M_EXTENSION
offset = ((bank > PFS_ID_BANK_1M) ? 1 : pfs->inode_start_page);
#else
offset = ((bank > PFS_ID_BANK_256K) ? 1 : pfs->inode_start_page);
#endif
for (j = 0; j < offset; j ++){
checked_inode.inode_page[j].ipage =
tmp_inode.inode_page[j].ipage;
}
for (; j < PFS_INODE_SIZE_PER_PAGE; j++)
checked_inode.inode_page[j].ipage = PFS_PAGE_NOT_USED;
/* read file info */
for (j = 0; j < pfs->dir_size; j++) {
while(file_next_node[j].inode_t.bank == bank &&
file_next_node[j].ipage >= (u16)pfs->inode_start_page){
u8 pp;
pp = file_next_node[j].inode_t.page;
file_next_node[j] =
checked_inode.inode_page[pp] = tmp_inode.inode_page[pp];
}
}
if ((ret = __osPfsRWInode(pfs, &checked_inode, PFS_WRITE, bank))
!= 0)
return(ret);
}
if (fixed != 0)
pfs->status |= PFS_CORRUPTED;
else
pfs->status &= ~PFS_CORRUPTED;
return(0);
}
/* make distribution map*/
s32 corrupted_init(OSPfs *pfs, __OSInodeCache *cache)
{
int i, n;
int offset;
u8 bank;
#ifdef _PFS_1M_EXTENSION
u8 startbank;
#endif
__OSInodeUnit tpage;
__OSInode tmp_inode;
s32 ret;
#ifdef _PFS_1M_EXTENSION
if (pfs->banks < PFS_ID_BANK_1M) {
startbank = PFS_ID_BANK_256K;
} else {
startbank = PFS_ID_BANK_1M;
}
#endif
for (i = 0; i < PFS_INODE_DIST_MAP; i ++){
cache->map[i] = 0;
}
cache->bank = 255;
#ifdef _PFS_1M_EXTENSION
for (bank = startbank; bank < pfs->banks; bank ++){
offset = ((bank > PFS_ID_BANK_1M) ? 1 : pfs->inode_start_page);
#else
for (bank = PFS_ID_BANK_256K; bank < pfs->banks; bank ++){
offset = ((bank > PFS_ID_BANK_256K) ? 1 : pfs->inode_start_page);
#endif
ret = __osPfsRWInode(pfs, &tmp_inode, PFS_READ, bank);
if ((ret != 0) && (ret != PFS_ERR_INCONSISTENT)) return(ret);
for (i = offset; i < PFS_INODE_SIZE_PER_PAGE; i ++){
tpage = tmp_inode.inode_page[i];
if (tpage.ipage >= pfs->inode_start_page){
if (tpage.inode_t.bank != bank){
n = (int)((tpage.inode_t.page & 0x7f)/ PFS_SECTOR_SIZE)
+ PFS_SECTOR_PER_BANK
* (int)(tpage.inode_t.bank % PFS_BANK_LAPPED_BY);
cache->map[n] |= (1 << (bank % PFS_BANK_LAPPED_BY));
}
}
}
}
return(0);
}
s32
corrupted(OSPfs *pfs, __OSInodeUnit fpage, __OSInodeCache *cache)
{
int j, n;
s32 hit = 0;
u8 bank;
#ifdef _PFS_1M_EXTENSION
u8 startbank;
#endif
int offset;
s32 ret = 0;
#ifdef _PFS_1M_EXTENSION
if (pfs->banks < PFS_ID_BANK_1M) {
startbank = PFS_ID_BANK_256K;
} else {
startbank = PFS_ID_BANK_1M;
}
#endif
n = (int)(fpage.inode_t.page / PFS_SECTOR_SIZE)
+ PFS_SECTOR_PER_BANK
* (int)(fpage.inode_t.bank % PFS_BANK_LAPPED_BY);
#ifdef _PFS_1M_EXTENSION
for (bank = startbank; bank < pfs->banks; bank++) {
offset = ((bank > PFS_ID_BANK_1M) ? 1 : pfs->inode_start_page);
#else
for (bank = PFS_ID_BANK_256K; bank < pfs->banks; bank++) {
offset = ((bank > PFS_ID_BANK_256K) ? 1 : pfs->inode_start_page);
#endif
if ((bank == fpage.inode_t.bank) ||
(cache->map[n] & (1 << (bank % PFS_BANK_LAPPED_BY))) != 0){
if (bank != cache->bank){
ret = __osPfsRWInode(pfs, &(cache->inode), PFS_READ, bank);
if ((ret != 0) && (ret != PFS_ERR_INCONSISTENT))
return(ret);
cache->bank = bank;
}
for (j = offset; ((hit < 2) && (j < PFS_INODE_SIZE_PER_PAGE));
j++) {
if (cache->inode.inode_page[j].ipage == fpage.ipage) {
hit++;
}
}
if (hit >= 2)
return(2);
}
}
return(hit);
}