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63c47c286d
Al Viro pointed out that the current IB userspace verbs interface allows userspace to cause mischief by closing file descriptors before we're ready, or issuing the same command twice at the same time. This patch closes those races, and fixes other obvious problems such as a module reference leak. Some other interface bogosities will require an ABI change to fix properly, so I'm deferring those fixes until 2.6.15. Signed-off-by: Roland Dreier <rolandd@cisco.com>
150 lines
4.8 KiB
C
150 lines
4.8 KiB
C
/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: uverbs.h 2559 2005-06-06 19:43:16Z roland $
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*/
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#ifndef UVERBS_H
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#define UVERBS_H
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/* Include device.h and fs.h until cdev.h is self-sufficient */
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/cdev.h>
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#include <linux/kref.h>
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#include <linux/idr.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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struct ib_uverbs_device {
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int devnum;
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struct cdev dev;
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struct class_device class_dev;
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struct ib_device *ib_dev;
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int num_comp;
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};
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struct ib_uverbs_event_file {
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struct kref ref;
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struct ib_uverbs_file *uverbs_file;
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spinlock_t lock;
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int fd;
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int is_async;
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wait_queue_head_t poll_wait;
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struct fasync_struct *async_queue;
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struct list_head event_list;
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};
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struct ib_uverbs_file {
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struct kref ref;
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struct semaphore mutex;
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struct ib_uverbs_device *device;
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struct ib_ucontext *ucontext;
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struct ib_event_handler event_handler;
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struct ib_uverbs_event_file async_file;
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struct ib_uverbs_event_file comp_file[1];
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};
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struct ib_uverbs_event {
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union {
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struct ib_uverbs_async_event_desc async;
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struct ib_uverbs_comp_event_desc comp;
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} desc;
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struct list_head list;
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struct list_head obj_list;
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u32 *counter;
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};
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struct ib_uevent_object {
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struct ib_uobject uobject;
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struct list_head event_list;
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u32 events_reported;
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};
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struct ib_ucq_object {
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struct ib_uobject uobject;
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struct list_head comp_list;
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struct list_head async_list;
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u32 comp_events_reported;
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u32 async_events_reported;
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};
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extern struct semaphore ib_uverbs_idr_mutex;
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extern struct idr ib_uverbs_pd_idr;
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extern struct idr ib_uverbs_mr_idr;
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extern struct idr ib_uverbs_mw_idr;
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extern struct idr ib_uverbs_ah_idr;
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extern struct idr ib_uverbs_cq_idr;
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extern struct idr ib_uverbs_qp_idr;
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extern struct idr ib_uverbs_srq_idr;
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void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
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void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
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int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
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void *addr, size_t size, int write);
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void ib_umem_release(struct ib_device *dev, struct ib_umem *umem);
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void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);
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#define IB_UVERBS_DECLARE_CMD(name) \
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ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
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const char __user *buf, int in_len, \
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int out_len)
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IB_UVERBS_DECLARE_CMD(query_params);
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IB_UVERBS_DECLARE_CMD(get_context);
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IB_UVERBS_DECLARE_CMD(query_device);
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IB_UVERBS_DECLARE_CMD(query_port);
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IB_UVERBS_DECLARE_CMD(query_gid);
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IB_UVERBS_DECLARE_CMD(query_pkey);
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IB_UVERBS_DECLARE_CMD(alloc_pd);
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IB_UVERBS_DECLARE_CMD(dealloc_pd);
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IB_UVERBS_DECLARE_CMD(reg_mr);
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IB_UVERBS_DECLARE_CMD(dereg_mr);
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IB_UVERBS_DECLARE_CMD(create_cq);
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IB_UVERBS_DECLARE_CMD(destroy_cq);
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IB_UVERBS_DECLARE_CMD(create_qp);
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IB_UVERBS_DECLARE_CMD(modify_qp);
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IB_UVERBS_DECLARE_CMD(destroy_qp);
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IB_UVERBS_DECLARE_CMD(attach_mcast);
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IB_UVERBS_DECLARE_CMD(detach_mcast);
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IB_UVERBS_DECLARE_CMD(create_srq);
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IB_UVERBS_DECLARE_CMD(modify_srq);
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IB_UVERBS_DECLARE_CMD(destroy_srq);
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#endif /* UVERBS_H */
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