forked from Minki/linux
staging: android: binder.c: binder_ioctl() cleanup
binder_ioctl() is quite huge and checkpatch dirty - mostly because of the amount of code for the BINDER_WRITE_READ and BINDER_SET_CONTEXT_MGR. Moved that code into the new binder_ioctl_write_read() and binder_ioctl_set_ctx_mgr() Signed-off-by: Tair Rzayev <tair.rzayev@gmail.com> Cc: Arve Hjønnevåg <arve@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tair Rzayev
Greg Kroah-Hartman
parent
ddac7d5fba
commit
78260ac625
@ -2593,6 +2593,106 @@ static unsigned int binder_poll(struct file *filp,
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return 0;
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}
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static int binder_ioctl_write_read(struct file *filp,
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unsigned int cmd, unsigned long arg,
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struct binder_thread *thread)
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{
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int ret = 0;
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struct binder_proc *proc = filp->private_data;
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unsigned int size = _IOC_SIZE(cmd);
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void __user *ubuf = (void __user *)arg;
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struct binder_write_read bwr;
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if (size != sizeof(struct binder_write_read)) {
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ret = -EINVAL;
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goto out;
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}
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if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
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ret = -EFAULT;
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goto out;
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}
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binder_debug(BINDER_DEBUG_READ_WRITE,
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"%d:%d write %lld at %016llx, read %lld at %016llx\n",
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proc->pid, thread->pid,
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(u64)bwr.write_size, (u64)bwr.write_buffer,
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(u64)bwr.read_size, (u64)bwr.read_buffer);
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if (bwr.write_size > 0) {
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ret = binder_thread_write(proc, thread,
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bwr.write_buffer,
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bwr.write_size,
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&bwr.write_consumed);
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trace_binder_write_done(ret);
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if (ret < 0) {
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bwr.read_consumed = 0;
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if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
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ret = -EFAULT;
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goto out;
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}
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}
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if (bwr.read_size > 0) {
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ret = binder_thread_read(proc, thread, bwr.read_buffer,
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bwr.read_size,
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&bwr.read_consumed,
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filp->f_flags & O_NONBLOCK);
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trace_binder_read_done(ret);
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if (!list_empty(&proc->todo))
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wake_up_interruptible(&proc->wait);
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if (ret < 0) {
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if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
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ret = -EFAULT;
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goto out;
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}
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}
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binder_debug(BINDER_DEBUG_READ_WRITE,
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"%d:%d wrote %lld of %lld, read return %lld of %lld\n",
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proc->pid, thread->pid,
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(u64)bwr.write_consumed, (u64)bwr.write_size,
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(u64)bwr.read_consumed, (u64)bwr.read_size);
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if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
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ret = -EFAULT;
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goto out;
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}
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out:
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return ret;
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}
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static int binder_ioctl_set_ctx_mgr(struct file *filp)
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{
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int ret = 0;
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struct binder_proc *proc = filp->private_data;
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kuid_t curr_euid = current_euid();
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if (binder_context_mgr_node != NULL) {
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pr_err("BINDER_SET_CONTEXT_MGR already set\n");
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ret = -EBUSY;
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goto out;
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}
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if (uid_valid(binder_context_mgr_uid)) {
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if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
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pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
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from_kuid(&init_user_ns, curr_euid),
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from_kuid(&init_user_ns,
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binder_context_mgr_uid));
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ret = -EPERM;
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goto out;
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}
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} else {
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binder_context_mgr_uid = curr_euid;
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}
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binder_context_mgr_node = binder_new_node(proc, 0, 0);
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if (binder_context_mgr_node == NULL) {
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ret = -ENOMEM;
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goto out;
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}
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binder_context_mgr_node->local_weak_refs++;
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binder_context_mgr_node->local_strong_refs++;
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binder_context_mgr_node->has_strong_ref = 1;
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binder_context_mgr_node->has_weak_ref = 1;
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out:
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return ret;
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}
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static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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int ret;
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@ -2600,9 +2700,9 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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struct binder_thread *thread;
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unsigned int size = _IOC_SIZE(cmd);
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void __user *ubuf = (void __user *)arg;
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kuid_t curr_euid = current_euid();
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/*pr_info("binder_ioctl: %d:%d %x %lx\n", proc->pid, current->pid, cmd, arg);*/
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/*pr_info("binder_ioctl: %d:%d %x %lx\n",
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proc->pid, current->pid, cmd, arg);*/
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trace_binder_ioctl(cmd, arg);
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@ -2618,61 +2718,11 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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}
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switch (cmd) {
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case BINDER_WRITE_READ: {
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struct binder_write_read bwr;
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if (size != sizeof(struct binder_write_read)) {
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ret = -EINVAL;
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case BINDER_WRITE_READ:
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ret = binder_ioctl_write_read(filp, cmd, arg, thread);
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if (ret)
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goto err;
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}
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if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
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ret = -EFAULT;
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goto err;
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}
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binder_debug(BINDER_DEBUG_READ_WRITE,
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"%d:%d write %lld at %016llx, read %lld at %016llx\n",
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proc->pid, thread->pid,
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(u64)bwr.write_size, (u64)bwr.write_buffer,
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(u64)bwr.read_size, (u64)bwr.read_buffer);
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if (bwr.write_size > 0) {
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ret = binder_thread_write(proc, thread,
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bwr.write_buffer,
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bwr.write_size,
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&bwr.write_consumed);
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trace_binder_write_done(ret);
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if (ret < 0) {
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bwr.read_consumed = 0;
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if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
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ret = -EFAULT;
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goto err;
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}
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}
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if (bwr.read_size > 0) {
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ret = binder_thread_read(proc, thread, bwr.read_buffer,
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bwr.read_size,
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&bwr.read_consumed,
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filp->f_flags & O_NONBLOCK);
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trace_binder_read_done(ret);
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if (!list_empty(&proc->todo))
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wake_up_interruptible(&proc->wait);
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if (ret < 0) {
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if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
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ret = -EFAULT;
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goto err;
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}
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}
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binder_debug(BINDER_DEBUG_READ_WRITE,
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"%d:%d wrote %lld of %lld, read return %lld of %lld\n",
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proc->pid, thread->pid,
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(u64)bwr.write_consumed, (u64)bwr.write_size,
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(u64)bwr.read_consumed, (u64)bwr.read_size);
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if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
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ret = -EFAULT;
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goto err;
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}
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break;
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}
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case BINDER_SET_MAX_THREADS:
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if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
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ret = -EINVAL;
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@ -2680,31 +2730,9 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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}
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break;
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case BINDER_SET_CONTEXT_MGR:
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if (binder_context_mgr_node != NULL) {
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pr_err("BINDER_SET_CONTEXT_MGR already set\n");
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ret = -EBUSY;
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ret = binder_ioctl_set_ctx_mgr(filp);
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if (ret)
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goto err;
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}
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if (uid_valid(binder_context_mgr_uid)) {
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if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
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pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
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from_kuid(&init_user_ns, curr_euid),
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from_kuid(&init_user_ns, binder_context_mgr_uid));
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ret = -EPERM;
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goto err;
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}
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} else {
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binder_context_mgr_uid = curr_euid;
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}
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binder_context_mgr_node = binder_new_node(proc, 0, 0);
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if (binder_context_mgr_node == NULL) {
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ret = -ENOMEM;
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goto err;
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}
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binder_context_mgr_node->local_weak_refs++;
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binder_context_mgr_node->local_strong_refs++;
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binder_context_mgr_node->has_strong_ref = 1;
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binder_context_mgr_node->has_weak_ref = 1;
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break;
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case BINDER_THREAD_EXIT:
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binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
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