int replay(const char *log_data) {
uint64_t fv,lv; //fv = filesystem's version lv = log's version
uint32_t ts;
uint8_t status;
char buff[10000];
char *ptr;
char* errormsgs[]={ ERROR_STRINGS };
char *test_ptr;
sprintf(buff,"%s",log_data);
ptr = buff;
//for test
test_ptr = buff;
fv = shadow_fs_getversion();
GETU64(lv,ptr);
if(lv < fv) {
MFSLOG(LOG_ERR,"the changelog's verison %lu is smaller than filesystem's version %lu",lv,fv);
//more complicated method to ensure consistency
} else {
status = ERROR_MISMATCH;
EAT(ptr,lv,':');
EAT(ptr,lv,' ');
GETU32(ts,ptr);
EAT(ptr,lv,'|');
switch (*ptr) {
case 'A':
if (strncmp(ptr,"ACCESS",6)==0) {
status = do_access(lv,ts,ptr+6);
} else if (strncmp(ptr,"ATTR",4)==0) {
status = do_attr(lv,ts,ptr+4);
} else if (strncmp(ptr,"APPEND",6)==0) {
status = do_append(lv,ts,ptr+6);
} else if (strncmp(ptr,"AQUIRE",6)==0) {
status = do_aquire(lv,ts,ptr+6);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'C':
if (strncmp(ptr,"CREATE",6)==0) {
status = do_create(lv,ts,ptr+6);
} else if (strncmp(ptr,"CUSTOMER",8)==0) { // deprecated
status = do_session(lv,ts,ptr+8);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'E':
if (strncmp(ptr,"EMPTYTRASH",10)==0) {
status = do_emptytrash(lv,ts,ptr+10);
} else if (strncmp(ptr,"EMPTYRESERVED",13)==0) {
status = do_emptyreserved(lv,ts,ptr+13);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'F':
if (strncmp(ptr,"FREEINODES",10)==0) {
status = do_freeinodes(lv,ts,ptr+10);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'I':
if (strncmp(ptr,"INCVERSION",10)==0) {
status = do_incversion(lv,ts,ptr+10);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'L':
if (strncmp(ptr,"LENGTH",6)==0) {
status = do_length(lv,ts,ptr+6);
} else if (strncmp(ptr,"LINK",4)==0) {
status = do_link(lv,ts,ptr+4);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'M':
if (strncmp(ptr,"MOVE",4)==0) {
status = do_move(lv,ts,ptr+4);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'P':
if (strncmp(ptr,"PURGE",5)==0) {
status = do_purge(lv,ts,ptr+5);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'R':
if (strncmp(ptr,"RELEASE",7)==0) {
status = do_release(lv,ts,ptr+7);
} else if (strncmp(ptr,"REPAIR",6)==0) {
status = do_repair(lv,ts,ptr+6);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'S':
if (strncmp(ptr,"SETEATTR",8)==0) {
status = do_seteattr(lv,ts,ptr+8);
} else if (strncmp(ptr,"SETGOAL",7)==0) {
status = do_setgoal(lv,ts,ptr+7);
} else if (strncmp(ptr,"SETPATH",7)==0) {
status = do_setpath(lv,ts,ptr+7);
} else if (strncmp(ptr,"SETTRASHTIME",12)==0) {
status = do_settrashtime(lv,ts,ptr+12);
} else if (strncmp(ptr,"SNAPSHOT",8)==0) {
status = do_snapshot(lv,ts,ptr+8);
} else if (strncmp(ptr,"SYMLINK",7)==0) {
status = do_symlink(lv,ts,ptr+7);
} else if (strncmp(ptr,"SESSION",7)==0) {
status = do_session(lv,ts,ptr+7);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'T':
if (strncmp(ptr,"TRUNC",5)==0) {
status = do_trunc(lv,ts,ptr+5);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'U':
if (strncmp(ptr,"UNLINK",6)==0) {
status = do_unlink(lv,ts,ptr+6);
} else if (strncmp(ptr,"UNDEL",5)==0) {
status = do_undel(lv,ts,ptr+5);
} else if (strncmp(ptr,"UNLOCK",6)==0) {
status = do_unlock(lv,ts,ptr+6);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'W':
if (strncmp(ptr,"WRITE",5)==0) {
status = do_write(lv,ts,ptr+5);
} else {
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
default:
MFSLOG(LOG_ERR,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
/**
* if master is down, slave switch, we may missed some metadata
* return 0 to let the process continue, otherwise, we will reply the
* log forever.
*
* Dongyang, Zhang
*/
if (status!=STATUS_OK) {
MFSLOG(LOG_ERR,"%"PRIu64": error: %"PRIu8" (%s),the log is (%s)",lv,status,errormsgs[status],test_ptr);
// syslog(LOG_ERR,"%"PRIu64": error: %"PRIu8" (%s)",lv,status,errormsgs[status]);
return 1;
}
fv = shadow_fs_getversion();
if (lv+1!=fv) {
MFSLOG(LOG_ERR,"%"PRIu64": version mismatch fsversion:%"PRIu64"",lv,fv);
return 1;
}
}
return 0;
}
int restore_line(const char *filename,uint64_t lv,char *line) {
char *ptr;
uint32_t ts;
int status;
char* errormsgs[]={ ERROR_STRINGS };
status = ERROR_MISMATCH;
ptr = line;
EAT(ptr,filename,lv,':');
EAT(ptr,filename,lv,' ');
GETU32(ts,ptr);
EAT(ptr,filename,lv,'|');
switch (*ptr) {
case 'A':
if (strncmp(ptr,"ACCESS",6)==0) {
status = do_access(filename,lv,ts,ptr+6);
} else if (strncmp(ptr,"ATTR",4)==0) {
status = do_attr(filename,lv,ts,ptr+4);
} else if (strncmp(ptr,"APPEND",6)==0) {
status = do_append(filename,lv,ts,ptr+6);
} else if (strncmp(ptr,"ACQUIRE",7)==0) {
status = do_acquire(filename,lv,ts,ptr+7);
} else if (strncmp(ptr,"AQUIRE",6)==0) {
status = do_acquire(filename,lv,ts,ptr+6);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'C':
if (strncmp(ptr,"CREATE",6)==0) {
status = do_create(filename,lv,ts,ptr+6);
} else if (strncmp(ptr,"CUSTOMER",8)==0) { // deprecated
status = do_session(filename,lv,ts,ptr+8);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'E':
if (strncmp(ptr,"EMPTYTRASH",10)==0) {
status = do_emptytrash(filename,lv,ts,ptr+10);
} else if (strncmp(ptr,"EMPTYRESERVED",13)==0) {
status = do_emptyreserved(filename,lv,ts,ptr+13);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'F':
if (strncmp(ptr,"FREEINODES",10)==0) {
status = do_freeinodes(filename,lv,ts,ptr+10);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'I':
if (strncmp(ptr,"INCVERSION",10)==0) {
status = do_incversion(filename,lv,ts,ptr+10);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'L':
if (strncmp(ptr,"LENGTH",6)==0) {
status = do_length(filename,lv,ts,ptr+6);
} else if (strncmp(ptr,"LINK",4)==0) {
status = do_link(filename,lv,ts,ptr+4);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'M':
if (strncmp(ptr,"MOVE",4)==0) {
status = do_move(filename,lv,ts,ptr+4);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'P':
if (strncmp(ptr,"PURGE",5)==0) {
status = do_purge(filename,lv,ts,ptr+5);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'Q':
if (strncmp(ptr,"QUOTA",5)==0) {
status = do_quota(filename,lv,ts,ptr+5);
}
break;
case 'R':
if (strncmp(ptr,"RELEASE",7)==0) {
status = do_release(filename,lv,ts,ptr+7);
} else if (strncmp(ptr,"REPAIR",6)==0) {
status = do_repair(filename,lv,ts,ptr+6);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'S':
if (strncmp(ptr,"SETEATTR",8)==0) {
status = do_seteattr(filename,lv,ts,ptr+8);
} else if (strncmp(ptr,"SETGOAL",7)==0) {
status = do_setgoal(filename,lv,ts,ptr+7);
} else if (strncmp(ptr,"SETPATH",7)==0) {
status = do_setpath(filename,lv,ts,ptr+7);
} else if (strncmp(ptr,"SETTRASHTIME",12)==0) {
status = do_settrashtime(filename,lv,ts,ptr+12);
} else if (strncmp(ptr,"SETXATTR",8)==0) {
status = do_setxattr(filename,lv,ts,ptr+8);
} else if (strncmp(ptr,"SNAPSHOT",8)==0) {
status = do_snapshot(filename,lv,ts,ptr+8);
} else if (strncmp(ptr,"SYMLINK",7)==0) {
status = do_symlink(filename,lv,ts,ptr+7);
} else if (strncmp(ptr,"SESSION",7)==0) {
status = do_session(filename,lv,ts,ptr+7);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'T':
if (strncmp(ptr,"TRUNC",5)==0) {
status = do_trunc(filename,lv,ts,ptr+5);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'U':
if (strncmp(ptr,"UNLINK",6)==0) {
status = do_unlink(filename,lv,ts,ptr+6);
} else if (strncmp(ptr,"UNDEL",5)==0) {
status = do_undel(filename,lv,ts,ptr+5);
} else if (strncmp(ptr,"UNLOCK",6)==0) {
status = do_unlock(filename,lv,ts,ptr+6);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
case 'W':
if (strncmp(ptr,"WRITE",5)==0) {
status = do_write(filename,lv,ts,ptr+5);
} else {
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
break;
default:
printf("%s:%"PRIu64": unknown entry '%s'\n",filename,lv,ptr);
}
if (status>STATUS_OK) {
printf("%s:%"PRIu64": error: %d (%s)\n",filename,lv,status,errormsgs[status]);
}
return status;
}
int restore(void) {
FILE *fd;
char buff[10000];
char *ptr;
uint64_t v,lv;
uint32_t ts;
uint8_t status;
uint32_t dplen;
char *datapath = NULL;
char *logpath = NULL;
char* errormsgs[]={ ERROR_STRINGS };
v = shadow_fs_getversion();
lv = 0;
MFSLOG(LOG_NOTICE,"meta data version: %"PRIu64"",v);
datapath = strdup(DATA_PATH);
dplen = strlen(datapath);
logpath = malloc(dplen+sizeof("/changelog.0.mfs"));
memcpy(logpath,datapath,dplen);
memcpy(logpath+dplen,"/changelog.0.mfs",sizeof("/changelog.0.mfs"));
fd = fopen(logpath,"r");
if (fd==NULL) {
MFSLOG(LOG_NOTICE,"can't open changemeta file: %s",logpath);
return 1;
}
while (fgets(buff,10000,fd)) {
ptr = buff;
GETU64(lv,ptr);
if (lv<v) {
// skip
} else {
status = ERROR_MISMATCH;
EAT(ptr,lv,':');
EAT(ptr,lv,' ');
GETU32(ts,ptr);
EAT(ptr,lv,'|');
switch (*ptr) {
case 'A':
if (strncmp(ptr,"ACCESS",6)==0) {
status = do_access(lv,ts,ptr+6);
} else if (strncmp(ptr,"ATTR",4)==0) {
status = do_attr(lv,ts,ptr+4);
} else if (strncmp(ptr,"APPEND",6)==0) {
status = do_append(lv,ts,ptr+6);
} else if (strncmp(ptr,"AQUIRE",6)==0) {
status = do_aquire(lv,ts,ptr+6);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'C':
if (strncmp(ptr,"CREATE",6)==0) {
status = do_create(lv,ts,ptr+6);
} else if (strncmp(ptr,"CUSTOMER",8)==0) { // deprecated
status = do_session(lv,ts,ptr+8);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'E':
if (strncmp(ptr,"EMPTYTRASH",10)==0) {
status = do_emptytrash(lv,ts,ptr+10);
} else if (strncmp(ptr,"EMPTYRESERVED",13)==0) {
status = do_emptyreserved(lv,ts,ptr+13);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'F':
if (strncmp(ptr,"FREEINODES",10)==0) {
status = do_freeinodes(lv,ts,ptr+10);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'I':
if (strncmp(ptr,"INCVERSION",10)==0) {
status = do_incversion(lv,ts,ptr+10);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'L':
if (strncmp(ptr,"LENGTH",6)==0) {
status = do_length(lv,ts,ptr+6);
} else if (strncmp(ptr,"LINK",4)==0) {
status = do_link(lv,ts,ptr+4);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'M':
if (strncmp(ptr,"MOVE",4)==0) {
status = do_move(lv,ts,ptr+4);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'P':
if (strncmp(ptr,"PURGE",5)==0) {
status = do_purge(lv,ts,ptr+5);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'R':
if (strncmp(ptr,"RELEASE",7)==0) {
status = do_release(lv,ts,ptr+7);
} else if (strncmp(ptr,"REPAIR",6)==0) {
status = do_repair(lv,ts,ptr+6);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'S':
if (strncmp(ptr,"SETEATTR",8)==0) {
status = do_seteattr(lv,ts,ptr+8);
} else if (strncmp(ptr,"SETGOAL",7)==0) {
status = do_setgoal(lv,ts,ptr+7);
} else if (strncmp(ptr,"SETPATH",7)==0) {
status = do_setpath(lv,ts,ptr+7);
} else if (strncmp(ptr,"SETTRASHTIME",12)==0) {
status = do_settrashtime(lv,ts,ptr+12);
} else if (strncmp(ptr,"SNAPSHOT",8)==0) {
status = do_snapshot(lv,ts,ptr+8);
} else if (strncmp(ptr,"SYMLINK",7)==0) {
status = do_symlink(lv,ts,ptr+7);
} else if (strncmp(ptr,"SESSION",7)==0) {
status = do_session(lv,ts,ptr+7);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'T':
if (strncmp(ptr,"TRUNC",5)==0) {
status = do_trunc(lv,ts,ptr+5);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'U':
if (strncmp(ptr,"UNLINK",6)==0) {
status = do_unlink(lv,ts,ptr+6);
} else if (strncmp(ptr,"UNDEL",5)==0) {
status = do_undel(lv,ts,ptr+5);
} else if (strncmp(ptr,"UNLOCK",6)==0) {
status = do_unlock(lv,ts,ptr+6);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
case 'W':
if (strncmp(ptr,"WRITE",5)==0) {
status = do_write(lv,ts,ptr+5);
} else {
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
break;
default:
MFSLOG(LOG_NOTICE,"%"PRIu64": unknown entry '%s'",lv,ptr);
}
/**
* let the restore continue if we missed some meta data, otherwise the
*
* Dongyang Zhang
*/
if (status!=STATUS_OK) {
MFSLOG(LOG_ERR,"%"PRIu64": error: %"PRIu8" (%s)",lv,status,errormsgs[status]);
return 1;
}
v = shadow_fs_getversion();
if (lv+1!=v) {
MFSLOG(LOG_ERR,"%"PRIu64": version mismatch",lv);
return 1;
}
}
}
fclose(fd);
MFSLOG(LOG_NOTICE,"version after applying changelog: %"PRIu64"",v);
return 0;
}