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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2026 Richard Qin */
/*
* super.cc — Superblock lifecycle + filesystem type registry
*/
#include <lume/fs.h>
#include <lume/dcache.h>
#include <lume/mount.h>
#include <lume/klog.h>
#include <lume/slab.h>
#include <lume/errno.h>
/* Global root filesystem entry points */
vfsmount* g_root_mnt = nullptr;
dentry* g_root_dentry = nullptr;
/* ================================================================== */
/* Filesystem type registry */
/* ================================================================== */
namespace {
list_head g_fs_types;
Spinlock g_fs_type_lock;
} // namespace
int register_filesystem(file_system_type* fs)
{
LockGuard guard(g_fs_type_lock);
list_add_tail(&fs->fs_list, &g_fs_types);
printk("[vfs] registered filesystem: %s\n", fs->name);
return 0;
}
file_system_type* get_fs_type(const char* name)
{
LockGuard guard(g_fs_type_lock);
list_node* pos;
list_for_each(pos, &g_fs_types) {
auto* fs = list_entry(pos, file_system_type, fs_list);
/* Simple strcmp */
const char* a = fs->name;
const char* b = name;
while (*a && *a == *b) { a++; b++; }
if (*a == '\0' && *b == '\0')
return fs;
}
return nullptr;
}
/* ================================================================== */
/* Superblock allocation */
/* ================================================================== */
super_block* alloc_super(file_system_type* type)
{
auto* sb = new super_block{};
if (!sb) return nullptr;
list_init(&sb->s_list);
list_init(&sb->s_inodes);
sb->s_type = type;
sb->s_op = nullptr;
sb->s_root = nullptr;
sb->s_fs_info = nullptr;
sb->s_blocksize = 4096;
sb->s_blocksize_bits = 12;
sb->s_maxbytes = 0x7FFFFFFFFFFFFFFFLL;
sb->s_time_gran = 1;
sb->s_time_min = 0;
sb->s_time_max = 0x7FFFFFFFFFFFFFFFLL;
sb->s_flags = 0;
sb->s_magic = 0;
sb->s_active.store(1);
sb->s_count = 1;
sb->s_max_links = 0;
sb->s_d_op = nullptr;
sb->s_mounts = nullptr;
sb->s_dev = 0;
for (int i = 0; i < 32; i++) sb->s_id[i] = 0;
return sb;
}
/* ================================================================== */
/* Init */
/* ================================================================== */
void super_init()
{
list_init(&g_fs_types);
}
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