IB/uverbs: Do not check for device disassociation during ioctl
Now that the ioctl path and uobjects are converted to use uverbs_api, it is now safe to remove the disassociation protection from the common ioctl code. This completes the work to make destroy functions continue to work even after device disassociation. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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@ -470,47 +470,32 @@ static int ib_uverbs_cmd_verbs(struct ib_uverbs_file *ufile,
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return ret;
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}
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#define IB_UVERBS_MAX_CMD_SZ 4096
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long ib_uverbs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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struct ib_uverbs_file *file = filp->private_data;
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struct ib_uverbs_ioctl_hdr __user *user_hdr =
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(struct ib_uverbs_ioctl_hdr __user *)arg;
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struct ib_uverbs_ioctl_hdr hdr;
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struct ib_device *ib_dev;
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int srcu_key;
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long err;
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int err;
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if (unlikely(cmd != RDMA_VERBS_IOCTL))
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return -ENOIOCTLCMD;
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err = copy_from_user(&hdr, user_hdr, sizeof(hdr));
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if (err)
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return -EFAULT;
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if (hdr.length > PAGE_SIZE ||
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hdr.length != struct_size(&hdr, attrs, hdr.num_attrs))
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return -EINVAL;
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if (hdr.reserved1 || hdr.reserved2)
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return -EPROTONOSUPPORT;
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srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
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ib_dev = srcu_dereference(file->device->ib_dev,
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&file->device->disassociate_srcu);
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if (!ib_dev) {
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err = -EIO;
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goto out;
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}
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if (cmd == RDMA_VERBS_IOCTL) {
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err = copy_from_user(&hdr, user_hdr, sizeof(hdr));
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if (err || hdr.length > IB_UVERBS_MAX_CMD_SZ ||
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hdr.length != sizeof(hdr) + hdr.num_attrs * sizeof(struct ib_uverbs_attr)) {
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err = -EINVAL;
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goto out;
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}
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if (hdr.reserved1 || hdr.reserved2) {
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err = -EPROTONOSUPPORT;
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goto out;
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}
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err = ib_uverbs_cmd_verbs(file, &hdr, user_hdr->attrs);
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} else {
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err = -ENOIOCTLCMD;
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}
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out:
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err = ib_uverbs_cmd_verbs(file, &hdr, user_hdr->attrs);
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srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
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return err;
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}
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