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#include <camellia/errno.h>
#include <camellia/fsutil.h>
#include <kernel/arch/amd64/driver/driver.h>
#include <kernel/arch/amd64/driver/util.h>
#include <kernel/panic.h>
#include <kernel/proc.h>
#include <kernel/util.h>
#include <kernel/vfs/request.h>
#include <shared/mem.h>
static long handle(VfsReq *req) {
// TODO document directory read format
// TODO don't hardcode
static const char base[] = "kdev/";
static const char dir[] =
"com1\0"
"ps2/\0"
"ata/\0"
"eth/\0"
"video/";
const char *id;
int len;
if (!req->caller) return -1;
if (req->type != VFSOP_OPEN) {
/* otherwise, uninitialized, to cause compiler warnings if used */
/* this operates under the assumption that base and dir never change
* but even if they do, that will just result in a crash. */
id = (void *__force)req->id;
if (id == base) {
len = sizeof base;
} else if (id == dir) {
len = sizeof dir;
} else {
kprintf("%p %p %p\n", base, dir, id);
assert(false);
}
}
switch (req->type) {
case VFSOP_OPEN:
if (reqpathcmp(req, "/")) return (long)base;
if (reqpathcmp(req, "/kdev/")) return (long)dir;
return -ENOENT;
case VFSOP_READ:
return req_readcopy(req, id, len);
// TODO getsize for the other kernel provided directories
case VFSOP_GETSIZE:
return len;
default:
return -ENOSYS;
}
}
static void accept(VfsReq *req) {
vfsreq_finish_short(req, handle(req));
}
void vfs_root_init(void) { vfs_root_register("", accept); }
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