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kernel: Implementing editable, removable mount points

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This commit is contained in:
ShirkNeko
2025-11-23 23:33:09 +08:00
parent 85bb10341a
commit a821b7d299
7 changed files with 368 additions and 17 deletions
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43
kernel/supercalls.c
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@@ -40,6 +40,8 @@
#include "manual_su.h"
#endif
#include "umount_manager.h"
#ifdef CONFIG_KSU_SUSFS
bool susfs_is_boot_completed_triggered = false;
#endif // #ifdef CONFIG_KSU_SUSFS
@@ -471,7 +473,7 @@ static int do_manage_mark(void __user *arg)
break;
#else
cmd.result = 0;
break;
break;
#endif
}
case KSU_MARK_MARK: {
@@ -488,8 +490,8 @@ static int do_manage_mark(void __user *arg)
}
#else
if (cmd.pid != 0) {
return 0;
}
return 0;
}
#endif
break;
}
@@ -507,8 +509,8 @@ static int do_manage_mark(void __user *arg)
}
#else
if (cmd.pid != 0) {
return 0;
}
return 0;
}
#endif
break;
}
@@ -871,6 +873,36 @@ 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.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 },
@@ -903,6 +935,7 @@ 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
};