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kernel: Implementing editable, removable mount points

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This commit is contained in:
ShirkNeko
2025-11-07 12:16:42 +08:00
parent d7c101e244
commit 9b209765c4
6 changed files with 423 additions and 13 deletions
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31
kernel/supercalls.c
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@@ -23,6 +23,7 @@
#include "kernel_compat.h"
#include "throne_comm.h"
#include "dynamic_manager.h"
#include "umount_manager.h"
#ifdef CONFIG_KSU_MANUAL_SU
#include "manual_su.h"
@@ -616,6 +617,35 @@ static int do_manual_su(void __user *arg)
}
#endif
static int do_umount_manager(void __user *arg)
{
struct ksu_umount_manager_cmd cmd;
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
pr_err("umount_manager: copy_from_user failed\n");
return -EFAULT;
}
switch (cmd.operation) {
case UMOUNT_OP_ADD: {
return ksu_umount_manager_add(cmd.path, cmd.check_mnt, cmd.flags, false);
}
case UMOUNT_OP_REMOVE: {
return ksu_umount_manager_remove(cmd.path);
}
case UMOUNT_OP_LIST: {
struct ksu_umount_entry_info __user *entries =
(struct ksu_umount_entry_info __user *)cmd.entries_ptr;
return ksu_umount_manager_get_entries(entries, &cmd.count);
}
case UMOUNT_OP_CLEAR_CUSTOM: {
return ksu_umount_manager_clear_custom();
}
default:
return -EINVAL;
}
}
// IOCTL handlers mapping table
static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
{ .cmd = KSU_IOCTL_GRANT_ROOT, .name = "GRANT_ROOT", .handler = do_grant_root, .perm_check = allowed_for_su },
@@ -645,6 +675,7 @@ static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
#ifdef CONFIG_KPM
{ .cmd = KSU_IOCTL_KPM, .name = "KPM_OPERATION", .handler = do_kpm, .perm_check = manager_or_root},
#endif
{ .cmd = KSU_IOCTL_UMOUNT_MANAGER, .name = "UMOUNT_MANAGER", .handler = do_umount_manager, .perm_check = manager_or_root},
{ .cmd = 0, .name = NULL, .handler = NULL, .perm_check = NULL} // Sentine
};