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/*
media-filesystem object schema code
tridge@samba.org, January 2001
released under the Gnu GPL v2
*/
#include "mfs.h"
#include "preload_schema.h"
#include <assert.h>
#define MAX_TYPES 200
#define MAX_ATTRS 100
static int current_type;
static char *types[MAX_TYPES];
static struct {
char *name;
int objtype;
} attrs[MAX_TYPES][MAX_ATTRS];
static void schema_add(int type, int attr, char *name, int objtype)
{
int i;
assert(type < MAX_TYPES);
assert(attr < MAX_ATTRS);
name = strdup(name);
if (type != -1) {
attrs[type][attr].name = name;
attrs[type][attr].objtype = objtype;
return;
}
for (i=0;i<MAX_TYPES;i++) {
attrs[i][attr].name = name;
attrs[i][attr].objtype = objtype;
}
}
/* used to load a local schema.txt to make things faster */
static int preload_schema()
{
int i, itype, iattr, atype=0;
char *type, *attr, *flag;
static int loaded = 0;
if (loaded) return 1;
loaded = 1;
for(i = 0; i < sizeof(preload_schema_table) / sizeof(preload_schema_t); i++) {
itype = preload_schema_table[i].itype;
type = preload_schema_table[i].type;
iattr = preload_schema_table[i].iattr;
attr = preload_schema_table[i].attr;
flag = preload_schema_table[i].attr_type;
if (!types[itype]) types[itype] = strdup(type);
attrs[itype][iattr].name = strdup(attr);
if (strcmp(flag,"string")==0) {
atype = TYPE_STRING;
} else if (strcmp(flag,"int")==0) {
atype = TYPE_INT;
} else if (strcmp(flag,"object")==0) {
atype = TYPE_OBJECT;
} else if (strcmp(flag,"file")==0) {
atype = TYPE_FILE;
} else {
vstream_error("error parsing preloaded schema table\n");
return 0;
}
if (! types[itype]) {
types[itype] = strdup(type);
}
schema_add(itype, iattr, attr, atype);
}
return 1;
}
void load_callback2(int fsid, struct mfs_subobj_header *obj,
struct mfs_attr_header *attr, void *data)
{
static char *name;
static u32 iattr;
if (obj->flags || !attr) return;
if (attr->attr == 16) {
name = (char *)data;
} else if (attr->attr == 17) {
iattr = ntohl(*(u32 *)data);
} else if (attr->attr == 18) {
u32 objtype = ntohl(*(u32 *)data);
schema_add(current_type, iattr, name, objtype);
}
}
void load_callback1(int fsid, struct mfs_subobj_header *obj,
struct mfs_attr_header *attr, void *data)
{
static char *name;
if (!obj->flags || !attr) return;
if (attr->attr == 16) {
name = strdup((char *)data);
} else if (attr->attr == 17) {
current_type = ntohl(*(u32 *)data);
types[current_type] = name;
}
}
static void load_schema(int type)
{
u32 size, fsid;
char path[100];
void *buf;
if (!attrs[0][1].name) {
schema_add(-1, 1, "Version", TYPE_INT);
schema_add(-1, 2, "Expiration", TYPE_INT);
schema_add(-1, 3, "Path", TYPE_STRING);
schema_add(-1, 4, "IndexPath", TYPE_STRING);
schema_add(-1, 5, "IndexUsed", TYPE_OBJECT);
schema_add(-1, 6, "IndexUsedBy", TYPE_OBJECT);
schema_add(-1, 7, "IndexAttr", TYPE_OBJECT);
schema_add(-1, 8, "ServerId", TYPE_STRING);
schema_add(-1, 9, "ServerVersion", TYPE_INT);
schema_add(-1, 10, "Uuid", TYPE_STRING);
schema_add(-1, 11, "Unsatisfied", TYPE_STRING);
schema_add(-1, 12, "Bits", TYPE_INT);
schema_add(-1, 13, "Unused1", TYPE_INT);
schema_add(-1, 14, "Unused2", TYPE_INT);
schema_add(-1, 15, "Unused3", TYPE_INT);
}
sprintf(path, "/ObjectType/%s", vstream_schema_type(type));
fsid = vstream_mfs_resolve(path);
if (fsid != 0) {
size = vstream_mfs_fsid_size(fsid);
if (size > 0) {
buf = malloc(size);
vstream_mfs_fsid_pread(fsid, buf, 0, size);
vstream_parse_object(fsid, buf, load_callback1);
vstream_parse_object(fsid, buf, load_callback2);
free(buf);
}
}
}
/* lookup a string for a schema type */
char *vstream_schema_type(int type)
{
if (!types[type]) preload_schema();
return types[type];
}
/* lookup an attribute for a given type and attr value,
auto-loading the schema if necessary */
char *vstream_schema_attrib(int type, int attr)
{
(void) vstream_schema_type(type);
if (type >= MAX_TYPES) {
vstream_error("Invalid type %d in vstream_schema_attrib\n", type);
return "UNKNOWN";
}
if (attr >= MAX_ATTRS) {
vstream_error("Invalid attr %d in vstream_schema_attrib\n", attr);
return "UNKNOWN";
}
if (!attrs[type][attr].name) {
load_schema(type);
}
if (!attrs[type][attr].name) {
attrs[type][attr].name = malloc(18);
snprintf(attrs[type][attr].name, 18, "UNKNOWN(%d,%d)", type, attr);
}
return attrs[type][attr].name;
}
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