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#include <kernel/mem/alloc.h>
#include <kernel/panic.h>
#include <kernel/vfs/mount.h>
#include <kernel/vfs/root.h>
#include <shared/mem.h>
// TODO not the place where this should be done
#include <kernel/arch/i386/driver/ps2.h>
#include <kernel/arch/i386/driver/serial.h>
struct vfs_mount *vfs_mount_seed(void) {
struct vfs_mount *mount = kmalloc(sizeof *mount);
struct vfs_backend *backend = kmalloc(sizeof *backend);
backend->is_user = false;
backend->potential_handlers = 1;
backend->refcount = 1;
backend->kern.ready = vfs_root_ready;
backend->kern.accept = vfs_root_accept;
*mount = (struct vfs_mount){
.prev = NULL,
.prefix = NULL,
.prefix_len = 0,
.backend = backend,
.refs = 1,
};
// what a mess.
// TODO register funcs
struct vfs_mount *ps2 = kmalloc(sizeof *ps2);
backend = kmalloc(sizeof *backend);
backend->is_user = false;
backend->potential_handlers = 1;
backend->refcount = 1;
backend->kern.ready = vfs_ps2_ready;
backend->kern.accept = vfs_ps2_accept;
*ps2 = (struct vfs_mount){
.prev = mount,
.prefix = "/ps2",
.prefix_len = 4,
.backend = backend,
.refs = 1,
};
// oh god oh fuck
struct vfs_mount *com = kmalloc(sizeof *com);
backend = kmalloc(sizeof *backend);
backend->is_user = false;
backend->potential_handlers = 1;
backend->refcount = 1;
backend->kern.ready = vfs_com1_ready;
backend->kern.accept = vfs_com1_accept;
*com = (struct vfs_mount){
.prev = ps2,
.prefix = "/com1",
.prefix_len = 5,
.backend = backend,
.refs = 1,
};
return com;
}
struct vfs_mount *vfs_mount_resolve(
struct vfs_mount *top, const char *path, size_t path_len)
{
for (; top; top = top->prev) {
if (top->prefix_len > path_len)
continue;
if (memcmp(top->prefix, path, top->prefix_len) != 0)
continue;
/* ensure that there's no garbage after the match
* recognize that e.g. /thisasdf doesn't get recognized as mounted under
* /this */
if (top->prefix_len == path_len) // can't happen if prefix == path
break;
if (path[top->prefix_len] == '/')
break;
}
return top;
}
void vfs_mount_remref(struct vfs_mount *mnt) {
assert(mnt);
assert(mnt->refs > 0);
if (--(mnt->refs) > 0) return;
struct vfs_mount *prev = mnt->prev;
if (mnt->backend)
vfs_backend_refdown(mnt->backend);
if (mnt->prefix_owned)
kfree(mnt->prefix);
kfree(mnt);
if (prev) vfs_mount_remref(prev);
}
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