1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2012 VMware, Inc. All rights reserved.
8 #include <linux/vmw_vmci_defs.h>
9 #include <linux/vmw_vmci_api.h>
10 #include <linux/miscdevice.h>
11 #include <linux/interrupt.h>
12 #include <linux/highmem.h>
13 #include <linux/atomic.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/sched.h>
18 #include <linux/cred.h>
19 #include <linux/slab.h>
20 #include <linux/file.h>
21 #include <linux/init.h>
22 #include <linux/poll.h>
23 #include <linux/pci.h>
24 #include <linux/smp.h>
28 #include "vmci_handle_array.h"
29 #include "vmci_queue_pair.h"
30 #include "vmci_datagram.h"
31 #include "vmci_doorbell.h"
32 #include "vmci_resource.h"
33 #include "vmci_context.h"
34 #include "vmci_driver.h"
35 #include "vmci_event.h"
37 #define VMCI_UTIL_NUM_RESOURCES 1
40 VMCI_NOTIFY_RESOURCE_QUEUE_PAIR = 0,
41 VMCI_NOTIFY_RESOURCE_DOOR_BELL = 1,
45 VMCI_NOTIFY_RESOURCE_ACTION_NOTIFY = 0,
46 VMCI_NOTIFY_RESOURCE_ACTION_CREATE = 1,
47 VMCI_NOTIFY_RESOURCE_ACTION_DESTROY = 2,
51 * VMCI driver initialization. This block can also be used to
52 * pass initial group membership etc.
54 struct vmci_init_blk {
59 /* VMCIqueue_pairAllocInfo_VMToVM */
60 struct vmci_qp_alloc_info_vmvm {
61 struct vmci_handle handle;
66 u64 produce_page_file; /* User VA. */
67 u64 consume_page_file; /* User VA. */
68 u64 produce_page_file_size; /* Size of the file name array. */
69 u64 consume_page_file_size; /* Size of the file name array. */
74 /* VMCISetNotifyInfo: Used to pass notify flag's address to the host driver. */
75 struct vmci_set_notify_info {
82 * Per-instance host state
84 struct vmci_host_dev {
85 struct vmci_ctx *context;
87 enum vmci_obj_type ct_type;
88 struct mutex lock; /* Mutex lock for vmci context access */
91 static struct vmci_ctx *host_context;
92 static bool vmci_host_device_initialized;
93 static atomic_t vmci_host_active_users = ATOMIC_INIT(0);
96 * Determines whether the VMCI host personality is
97 * available. Since the core functionality of the host driver is
98 * always present, all guests could possibly use the host
99 * personality. However, to minimize the deviation from the
100 * pre-unified driver state of affairs, we only consider the host
101 * device active if there is no active guest device or if there
102 * are VMX'en with active VMCI contexts using the host device.
104 bool vmci_host_code_active(void)
106 return vmci_host_device_initialized &&
107 (!vmci_guest_code_active() ||
108 atomic_read(&vmci_host_active_users) > 0);
111 int vmci_host_users(void)
113 return atomic_read(&vmci_host_active_users);
117 * Called on open of /dev/vmci.
119 static int vmci_host_open(struct inode *inode, struct file *filp)
121 struct vmci_host_dev *vmci_host_dev;
123 vmci_host_dev = kzalloc(sizeof(struct vmci_host_dev), GFP_KERNEL);
124 if (vmci_host_dev == NULL)
127 vmci_host_dev->ct_type = VMCIOBJ_NOT_SET;
128 mutex_init(&vmci_host_dev->lock);
129 filp->private_data = vmci_host_dev;
135 * Called on close of /dev/vmci, most often when the process
138 static int vmci_host_close(struct inode *inode, struct file *filp)
140 struct vmci_host_dev *vmci_host_dev = filp->private_data;
142 if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {
143 vmci_ctx_destroy(vmci_host_dev->context);
144 vmci_host_dev->context = NULL;
147 * The number of active contexts is used to track whether any
148 * VMX'en are using the host personality. It is incremented when
149 * a context is created through the IOCTL_VMCI_INIT_CONTEXT
152 atomic_dec(&vmci_host_active_users);
154 vmci_host_dev->ct_type = VMCIOBJ_NOT_SET;
156 kfree(vmci_host_dev);
157 filp->private_data = NULL;
162 * This is used to wake up the VMX when a VMCI call arrives, or
163 * to wake up select() or poll() at the next clock tick.
165 static __poll_t vmci_host_poll(struct file *filp, poll_table *wait)
167 struct vmci_host_dev *vmci_host_dev = filp->private_data;
168 struct vmci_ctx *context = vmci_host_dev->context;
171 if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {
172 /* Check for VMCI calls to this VM context. */
174 poll_wait(filp, &context->host_context.wait_queue,
177 spin_lock(&context->lock);
178 if (context->pending_datagrams > 0 ||
179 vmci_handle_arr_get_size(
180 context->pending_doorbell_array) > 0) {
183 spin_unlock(&context->lock);
189 * Copies the handles of a handle array into a user buffer, and
190 * returns the new length in userBufferSize. If the copy to the
191 * user buffer fails, the functions still returns VMCI_SUCCESS,
194 static int drv_cp_harray_to_user(void __user *user_buf_uva,
196 struct vmci_handle_arr *handle_array,
200 struct vmci_handle *handles;
203 array_size = vmci_handle_arr_get_size(handle_array);
205 if (array_size * sizeof(*handles) > *user_buf_size)
206 return VMCI_ERROR_MORE_DATA;
208 *user_buf_size = array_size * sizeof(*handles);
210 *retval = copy_to_user(user_buf_uva,
211 vmci_handle_arr_get_handles
212 (handle_array), *user_buf_size);
218 * Sets up a given context for notify to work. Maps the notify
219 * boolean in user VA into kernel space.
221 static int vmci_host_setup_notify(struct vmci_ctx *context,
226 if (context->notify_page) {
227 pr_devel("%s: Notify mechanism is already set up\n", __func__);
228 return VMCI_ERROR_DUPLICATE_ENTRY;
232 * We are using 'bool' internally, but let's make sure we explicit
235 BUILD_BUG_ON(sizeof(bool) != sizeof(u8));
236 if (!access_ok((void __user *)uva, sizeof(u8)))
237 return VMCI_ERROR_GENERIC;
240 * Lock physical page backing a given user VA.
242 retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page);
244 context->notify_page = NULL;
245 return VMCI_ERROR_GENERIC;
249 * Map the locked page and set up notify pointer.
251 context->notify = kmap(context->notify_page) + (uva & (PAGE_SIZE - 1));
252 vmci_ctx_check_signal_notify(context);
257 static int vmci_host_get_version(struct vmci_host_dev *vmci_host_dev,
258 unsigned int cmd, void __user *uptr)
260 if (cmd == IOCTL_VMCI_VERSION2) {
261 int __user *vptr = uptr;
262 if (get_user(vmci_host_dev->user_version, vptr))
267 * The basic logic here is:
269 * If the user sends in a version of 0 tell it our version.
270 * If the user didn't send in a version, tell it our version.
271 * If the user sent in an old version, tell it -its- version.
272 * If the user sent in an newer version, tell it our version.
274 * The rationale behind telling the caller its version is that
275 * Workstation 6.5 required that VMX and VMCI kernel module were
276 * version sync'd. All new VMX users will be programmed to
277 * handle the VMCI kernel module version.
280 if (vmci_host_dev->user_version > 0 &&
281 vmci_host_dev->user_version < VMCI_VERSION_HOSTQP) {
282 return vmci_host_dev->user_version;
288 #define vmci_ioctl_err(fmt, ...) \
289 pr_devel("%s: " fmt, ioctl_name, ##__VA_ARGS__)
291 static int vmci_host_do_init_context(struct vmci_host_dev *vmci_host_dev,
292 const char *ioctl_name,
295 struct vmci_init_blk init_block;
296 const struct cred *cred;
299 if (copy_from_user(&init_block, uptr, sizeof(init_block))) {
300 vmci_ioctl_err("error reading init block\n");
304 mutex_lock(&vmci_host_dev->lock);
306 if (vmci_host_dev->ct_type != VMCIOBJ_NOT_SET) {
307 vmci_ioctl_err("received VMCI init on initialized handle\n");
312 if (init_block.flags & ~VMCI_PRIVILEGE_FLAG_RESTRICTED) {
313 vmci_ioctl_err("unsupported VMCI restriction flag\n");
318 cred = get_current_cred();
319 vmci_host_dev->context = vmci_ctx_create(init_block.cid,
321 vmci_host_dev->user_version,
324 if (IS_ERR(vmci_host_dev->context)) {
325 retval = PTR_ERR(vmci_host_dev->context);
326 vmci_ioctl_err("error initializing context\n");
331 * Copy cid to userlevel, we do this to allow the VMX
332 * to enforce its policy on cid generation.
334 init_block.cid = vmci_ctx_get_id(vmci_host_dev->context);
335 if (copy_to_user(uptr, &init_block, sizeof(init_block))) {
336 vmci_ctx_destroy(vmci_host_dev->context);
337 vmci_host_dev->context = NULL;
338 vmci_ioctl_err("error writing init block\n");
343 vmci_host_dev->ct_type = VMCIOBJ_CONTEXT;
344 atomic_inc(&vmci_host_active_users);
346 vmci_call_vsock_callback(true);
351 mutex_unlock(&vmci_host_dev->lock);
355 static int vmci_host_do_send_datagram(struct vmci_host_dev *vmci_host_dev,
356 const char *ioctl_name,
359 struct vmci_datagram_snd_rcv_info send_info;
360 struct vmci_datagram *dg = NULL;
363 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
364 vmci_ioctl_err("only valid for contexts\n");
368 if (copy_from_user(&send_info, uptr, sizeof(send_info)))
371 if (send_info.len > VMCI_MAX_DG_SIZE) {
372 vmci_ioctl_err("datagram is too big (size=%d)\n",
377 if (send_info.len < sizeof(*dg)) {
378 vmci_ioctl_err("datagram is too small (size=%d)\n",
383 dg = memdup_user((void __user *)(uintptr_t)send_info.addr,
387 "cannot allocate memory to dispatch datagram\n");
391 if (VMCI_DG_SIZE(dg) != send_info.len) {
392 vmci_ioctl_err("datagram size mismatch\n");
397 pr_devel("Datagram dst (handle=0x%x:0x%x) src (handle=0x%x:0x%x), payload (size=%llu bytes)\n",
398 dg->dst.context, dg->dst.resource,
399 dg->src.context, dg->src.resource,
400 (unsigned long long)dg->payload_size);
402 /* Get source context id. */
403 cid = vmci_ctx_get_id(vmci_host_dev->context);
404 send_info.result = vmci_datagram_dispatch(cid, dg, true);
407 return copy_to_user(uptr, &send_info, sizeof(send_info)) ? -EFAULT : 0;
410 static int vmci_host_do_receive_datagram(struct vmci_host_dev *vmci_host_dev,
411 const char *ioctl_name,
414 struct vmci_datagram_snd_rcv_info recv_info;
415 struct vmci_datagram *dg = NULL;
419 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
420 vmci_ioctl_err("only valid for contexts\n");
424 if (copy_from_user(&recv_info, uptr, sizeof(recv_info)))
427 size = recv_info.len;
428 recv_info.result = vmci_ctx_dequeue_datagram(vmci_host_dev->context,
431 if (recv_info.result >= VMCI_SUCCESS) {
432 void __user *ubuf = (void __user *)(uintptr_t)recv_info.addr;
433 retval = copy_to_user(ubuf, dg, VMCI_DG_SIZE(dg));
439 return copy_to_user(uptr, &recv_info, sizeof(recv_info)) ? -EFAULT : 0;
442 static int vmci_host_do_alloc_queuepair(struct vmci_host_dev *vmci_host_dev,
443 const char *ioctl_name,
446 struct vmci_handle handle;
450 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
451 vmci_ioctl_err("only valid for contexts\n");
455 if (vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
456 struct vmci_qp_alloc_info_vmvm alloc_info;
457 struct vmci_qp_alloc_info_vmvm __user *info = uptr;
459 if (copy_from_user(&alloc_info, uptr, sizeof(alloc_info)))
462 handle = alloc_info.handle;
463 retptr = &info->result;
465 vmci_status = vmci_qp_broker_alloc(alloc_info.handle,
468 VMCI_NO_PRIVILEGE_FLAGS,
469 alloc_info.produce_size,
470 alloc_info.consume_size,
472 vmci_host_dev->context);
474 if (vmci_status == VMCI_SUCCESS)
475 vmci_status = VMCI_SUCCESS_QUEUEPAIR_CREATE;
477 struct vmci_qp_alloc_info alloc_info;
478 struct vmci_qp_alloc_info __user *info = uptr;
479 struct vmci_qp_page_store page_store;
481 if (copy_from_user(&alloc_info, uptr, sizeof(alloc_info)))
484 handle = alloc_info.handle;
485 retptr = &info->result;
487 page_store.pages = alloc_info.ppn_va;
488 page_store.len = alloc_info.num_ppns;
490 vmci_status = vmci_qp_broker_alloc(alloc_info.handle,
493 VMCI_NO_PRIVILEGE_FLAGS,
494 alloc_info.produce_size,
495 alloc_info.consume_size,
497 vmci_host_dev->context);
500 if (put_user(vmci_status, retptr)) {
501 if (vmci_status >= VMCI_SUCCESS) {
502 vmci_status = vmci_qp_broker_detach(handle,
503 vmci_host_dev->context);
511 static int vmci_host_do_queuepair_setva(struct vmci_host_dev *vmci_host_dev,
512 const char *ioctl_name,
515 struct vmci_qp_set_va_info set_va_info;
516 struct vmci_qp_set_va_info __user *info = uptr;
519 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
520 vmci_ioctl_err("only valid for contexts\n");
524 if (vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
525 vmci_ioctl_err("is not allowed\n");
529 if (copy_from_user(&set_va_info, uptr, sizeof(set_va_info)))
532 if (set_va_info.va) {
534 * VMX is passing down a new VA for the queue
537 result = vmci_qp_broker_map(set_va_info.handle,
538 vmci_host_dev->context,
542 * The queue pair is about to be unmapped by
545 result = vmci_qp_broker_unmap(set_va_info.handle,
546 vmci_host_dev->context, 0);
549 return put_user(result, &info->result) ? -EFAULT : 0;
552 static int vmci_host_do_queuepair_setpf(struct vmci_host_dev *vmci_host_dev,
553 const char *ioctl_name,
556 struct vmci_qp_page_file_info page_file_info;
557 struct vmci_qp_page_file_info __user *info = uptr;
560 if (vmci_host_dev->user_version < VMCI_VERSION_HOSTQP ||
561 vmci_host_dev->user_version >= VMCI_VERSION_NOVMVM) {
562 vmci_ioctl_err("not supported on this VMX (version=%d)\n",
563 vmci_host_dev->user_version);
567 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
568 vmci_ioctl_err("only valid for contexts\n");
572 if (copy_from_user(&page_file_info, uptr, sizeof(*info)))
576 * Communicate success pre-emptively to the caller. Note that the
577 * basic premise is that it is incumbent upon the caller not to look at
578 * the info.result field until after the ioctl() returns. And then,
579 * only if the ioctl() result indicates no error. We send up the
580 * SUCCESS status before calling SetPageStore() store because failing
581 * to copy up the result code means unwinding the SetPageStore().
583 * It turns out the logic to unwind a SetPageStore() opens a can of
584 * worms. For example, if a host had created the queue_pair and a
585 * guest attaches and SetPageStore() is successful but writing success
586 * fails, then ... the host has to be stopped from writing (anymore)
587 * data into the queue_pair. That means an additional test in the
588 * VMCI_Enqueue() code path. Ugh.
591 if (put_user(VMCI_SUCCESS, &info->result)) {
593 * In this case, we can't write a result field of the
594 * caller's info block. So, we don't even try to
600 result = vmci_qp_broker_set_page_store(page_file_info.handle,
601 page_file_info.produce_va,
602 page_file_info.consume_va,
603 vmci_host_dev->context);
604 if (result < VMCI_SUCCESS) {
605 if (put_user(result, &info->result)) {
607 * Note that in this case the SetPageStore()
608 * call failed but we were unable to
609 * communicate that to the caller (because the
610 * copy_to_user() call failed). So, if we
611 * simply return an error (in this case
612 * -EFAULT) then the caller will know that the
613 * SetPageStore failed even though we couldn't
614 * put the result code in the result field and
615 * indicate exactly why it failed.
617 * That says nothing about the issue where we
618 * were once able to write to the caller's info
619 * memory and now can't. Something more
620 * serious is probably going on than the fact
621 * that SetPageStore() didn't work.
630 static int vmci_host_do_qp_detach(struct vmci_host_dev *vmci_host_dev,
631 const char *ioctl_name,
634 struct vmci_qp_dtch_info detach_info;
635 struct vmci_qp_dtch_info __user *info = uptr;
638 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
639 vmci_ioctl_err("only valid for contexts\n");
643 if (copy_from_user(&detach_info, uptr, sizeof(detach_info)))
646 result = vmci_qp_broker_detach(detach_info.handle,
647 vmci_host_dev->context);
648 if (result == VMCI_SUCCESS &&
649 vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
650 result = VMCI_SUCCESS_LAST_DETACH;
653 return put_user(result, &info->result) ? -EFAULT : 0;
656 static int vmci_host_do_ctx_add_notify(struct vmci_host_dev *vmci_host_dev,
657 const char *ioctl_name,
660 struct vmci_ctx_info ar_info;
661 struct vmci_ctx_info __user *info = uptr;
665 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
666 vmci_ioctl_err("only valid for contexts\n");
670 if (copy_from_user(&ar_info, uptr, sizeof(ar_info)))
673 cid = vmci_ctx_get_id(vmci_host_dev->context);
674 result = vmci_ctx_add_notification(cid, ar_info.remote_cid);
676 return put_user(result, &info->result) ? -EFAULT : 0;
679 static int vmci_host_do_ctx_remove_notify(struct vmci_host_dev *vmci_host_dev,
680 const char *ioctl_name,
683 struct vmci_ctx_info ar_info;
684 struct vmci_ctx_info __user *info = uptr;
688 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
689 vmci_ioctl_err("only valid for contexts\n");
693 if (copy_from_user(&ar_info, uptr, sizeof(ar_info)))
696 cid = vmci_ctx_get_id(vmci_host_dev->context);
697 result = vmci_ctx_remove_notification(cid,
700 return put_user(result, &info->result) ? -EFAULT : 0;
703 static int vmci_host_do_ctx_get_cpt_state(struct vmci_host_dev *vmci_host_dev,
704 const char *ioctl_name,
707 struct vmci_ctx_chkpt_buf_info get_info;
712 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
713 vmci_ioctl_err("only valid for contexts\n");
717 if (copy_from_user(&get_info, uptr, sizeof(get_info)))
720 cid = vmci_ctx_get_id(vmci_host_dev->context);
721 get_info.result = vmci_ctx_get_chkpt_state(cid, get_info.cpt_type,
722 &get_info.buf_size, &cpt_buf);
723 if (get_info.result == VMCI_SUCCESS && get_info.buf_size) {
724 void __user *ubuf = (void __user *)(uintptr_t)get_info.cpt_buf;
725 retval = copy_to_user(ubuf, cpt_buf, get_info.buf_size);
732 return copy_to_user(uptr, &get_info, sizeof(get_info)) ? -EFAULT : 0;
735 static int vmci_host_do_ctx_set_cpt_state(struct vmci_host_dev *vmci_host_dev,
736 const char *ioctl_name,
739 struct vmci_ctx_chkpt_buf_info set_info;
744 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
745 vmci_ioctl_err("only valid for contexts\n");
749 if (copy_from_user(&set_info, uptr, sizeof(set_info)))
752 cpt_buf = memdup_user((void __user *)(uintptr_t)set_info.cpt_buf,
755 return PTR_ERR(cpt_buf);
757 cid = vmci_ctx_get_id(vmci_host_dev->context);
758 set_info.result = vmci_ctx_set_chkpt_state(cid, set_info.cpt_type,
759 set_info.buf_size, cpt_buf);
761 retval = copy_to_user(uptr, &set_info, sizeof(set_info)) ? -EFAULT : 0;
767 static int vmci_host_do_get_context_id(struct vmci_host_dev *vmci_host_dev,
768 const char *ioctl_name,
771 u32 __user *u32ptr = uptr;
773 return put_user(VMCI_HOST_CONTEXT_ID, u32ptr) ? -EFAULT : 0;
776 static int vmci_host_do_set_notify(struct vmci_host_dev *vmci_host_dev,
777 const char *ioctl_name,
780 struct vmci_set_notify_info notify_info;
782 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
783 vmci_ioctl_err("only valid for contexts\n");
787 if (copy_from_user(¬ify_info, uptr, sizeof(notify_info)))
790 if (notify_info.notify_uva) {
792 vmci_host_setup_notify(vmci_host_dev->context,
793 notify_info.notify_uva);
795 vmci_ctx_unset_notify(vmci_host_dev->context);
796 notify_info.result = VMCI_SUCCESS;
799 return copy_to_user(uptr, ¬ify_info, sizeof(notify_info)) ?
803 static int vmci_host_do_notify_resource(struct vmci_host_dev *vmci_host_dev,
804 const char *ioctl_name,
807 struct vmci_dbell_notify_resource_info info;
810 if (vmci_host_dev->user_version < VMCI_VERSION_NOTIFY) {
811 vmci_ioctl_err("invalid for current VMX versions\n");
815 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
816 vmci_ioctl_err("only valid for contexts\n");
820 if (copy_from_user(&info, uptr, sizeof(info)))
823 cid = vmci_ctx_get_id(vmci_host_dev->context);
825 switch (info.action) {
826 case VMCI_NOTIFY_RESOURCE_ACTION_NOTIFY:
827 if (info.resource == VMCI_NOTIFY_RESOURCE_DOOR_BELL) {
828 u32 flags = VMCI_NO_PRIVILEGE_FLAGS;
829 info.result = vmci_ctx_notify_dbell(cid, info.handle,
832 info.result = VMCI_ERROR_UNAVAILABLE;
836 case VMCI_NOTIFY_RESOURCE_ACTION_CREATE:
837 info.result = vmci_ctx_dbell_create(cid, info.handle);
840 case VMCI_NOTIFY_RESOURCE_ACTION_DESTROY:
841 info.result = vmci_ctx_dbell_destroy(cid, info.handle);
845 vmci_ioctl_err("got unknown action (action=%d)\n",
847 info.result = VMCI_ERROR_INVALID_ARGS;
850 return copy_to_user(uptr, &info, sizeof(info)) ? -EFAULT : 0;
853 static int vmci_host_do_recv_notifications(struct vmci_host_dev *vmci_host_dev,
854 const char *ioctl_name,
857 struct vmci_ctx_notify_recv_info info;
858 struct vmci_handle_arr *db_handle_array;
859 struct vmci_handle_arr *qp_handle_array;
864 if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
865 vmci_ioctl_err("only valid for contexts\n");
869 if (vmci_host_dev->user_version < VMCI_VERSION_NOTIFY) {
870 vmci_ioctl_err("not supported for the current vmx version\n");
874 if (copy_from_user(&info, uptr, sizeof(info)))
877 if ((info.db_handle_buf_size && !info.db_handle_buf_uva) ||
878 (info.qp_handle_buf_size && !info.qp_handle_buf_uva)) {
882 cid = vmci_ctx_get_id(vmci_host_dev->context);
884 info.result = vmci_ctx_rcv_notifications_get(cid,
885 &db_handle_array, &qp_handle_array);
886 if (info.result != VMCI_SUCCESS)
887 return copy_to_user(uptr, &info, sizeof(info)) ? -EFAULT : 0;
889 ubuf = (void __user *)(uintptr_t)info.db_handle_buf_uva;
890 info.result = drv_cp_harray_to_user(ubuf, &info.db_handle_buf_size,
891 db_handle_array, &retval);
892 if (info.result == VMCI_SUCCESS && !retval) {
893 ubuf = (void __user *)(uintptr_t)info.qp_handle_buf_uva;
894 info.result = drv_cp_harray_to_user(ubuf,
895 &info.qp_handle_buf_size,
896 qp_handle_array, &retval);
899 if (!retval && copy_to_user(uptr, &info, sizeof(info)))
902 vmci_ctx_rcv_notifications_release(cid,
903 db_handle_array, qp_handle_array,
904 info.result == VMCI_SUCCESS && !retval);
909 static long vmci_host_unlocked_ioctl(struct file *filp,
910 unsigned int iocmd, unsigned long ioarg)
912 #define VMCI_DO_IOCTL(ioctl_name, ioctl_fn) do { \
913 char *name = __stringify(IOCTL_VMCI_ ## ioctl_name); \
914 return vmci_host_do_ ## ioctl_fn( \
915 vmci_host_dev, name, uptr); \
918 struct vmci_host_dev *vmci_host_dev = filp->private_data;
919 void __user *uptr = (void __user *)ioarg;
922 case IOCTL_VMCI_INIT_CONTEXT:
923 VMCI_DO_IOCTL(INIT_CONTEXT, init_context);
924 case IOCTL_VMCI_DATAGRAM_SEND:
925 VMCI_DO_IOCTL(DATAGRAM_SEND, send_datagram);
926 case IOCTL_VMCI_DATAGRAM_RECEIVE:
927 VMCI_DO_IOCTL(DATAGRAM_RECEIVE, receive_datagram);
928 case IOCTL_VMCI_QUEUEPAIR_ALLOC:
929 VMCI_DO_IOCTL(QUEUEPAIR_ALLOC, alloc_queuepair);
930 case IOCTL_VMCI_QUEUEPAIR_SETVA:
931 VMCI_DO_IOCTL(QUEUEPAIR_SETVA, queuepair_setva);
932 case IOCTL_VMCI_QUEUEPAIR_SETPAGEFILE:
933 VMCI_DO_IOCTL(QUEUEPAIR_SETPAGEFILE, queuepair_setpf);
934 case IOCTL_VMCI_QUEUEPAIR_DETACH:
935 VMCI_DO_IOCTL(QUEUEPAIR_DETACH, qp_detach);
936 case IOCTL_VMCI_CTX_ADD_NOTIFICATION:
937 VMCI_DO_IOCTL(CTX_ADD_NOTIFICATION, ctx_add_notify);
938 case IOCTL_VMCI_CTX_REMOVE_NOTIFICATION:
939 VMCI_DO_IOCTL(CTX_REMOVE_NOTIFICATION, ctx_remove_notify);
940 case IOCTL_VMCI_CTX_GET_CPT_STATE:
941 VMCI_DO_IOCTL(CTX_GET_CPT_STATE, ctx_get_cpt_state);
942 case IOCTL_VMCI_CTX_SET_CPT_STATE:
943 VMCI_DO_IOCTL(CTX_SET_CPT_STATE, ctx_set_cpt_state);
944 case IOCTL_VMCI_GET_CONTEXT_ID:
945 VMCI_DO_IOCTL(GET_CONTEXT_ID, get_context_id);
946 case IOCTL_VMCI_SET_NOTIFY:
947 VMCI_DO_IOCTL(SET_NOTIFY, set_notify);
948 case IOCTL_VMCI_NOTIFY_RESOURCE:
949 VMCI_DO_IOCTL(NOTIFY_RESOURCE, notify_resource);
950 case IOCTL_VMCI_NOTIFICATIONS_RECEIVE:
951 VMCI_DO_IOCTL(NOTIFICATIONS_RECEIVE, recv_notifications);
953 case IOCTL_VMCI_VERSION:
954 case IOCTL_VMCI_VERSION2:
955 return vmci_host_get_version(vmci_host_dev, iocmd, uptr);
958 pr_devel("%s: Unknown ioctl (iocmd=%d)\n", __func__, iocmd);
965 static const struct file_operations vmuser_fops = {
966 .owner = THIS_MODULE,
967 .open = vmci_host_open,
968 .release = vmci_host_close,
969 .poll = vmci_host_poll,
970 .unlocked_ioctl = vmci_host_unlocked_ioctl,
971 .compat_ioctl = compat_ptr_ioctl,
974 static struct miscdevice vmci_host_miscdev = {
976 .minor = MISC_DYNAMIC_MINOR,
977 .fops = &vmuser_fops,
980 int __init vmci_host_init(void)
984 host_context = vmci_ctx_create(VMCI_HOST_CONTEXT_ID,
985 VMCI_DEFAULT_PROC_PRIVILEGE_FLAGS,
986 -1, VMCI_VERSION, NULL);
987 if (IS_ERR(host_context)) {
988 error = PTR_ERR(host_context);
989 pr_warn("Failed to initialize VMCIContext (error%d)\n",
994 error = misc_register(&vmci_host_miscdev);
996 pr_warn("Module registration error (name=%s, major=%d, minor=%d, err=%d)\n",
997 vmci_host_miscdev.name,
998 MISC_MAJOR, vmci_host_miscdev.minor,
1000 pr_warn("Unable to initialize host personality\n");
1001 vmci_ctx_destroy(host_context);
1005 pr_info("VMCI host device registered (name=%s, major=%d, minor=%d)\n",
1006 vmci_host_miscdev.name, MISC_MAJOR, vmci_host_miscdev.minor);
1008 vmci_host_device_initialized = true;
1012 void __exit vmci_host_exit(void)
1014 vmci_host_device_initialized = false;
1016 misc_deregister(&vmci_host_miscdev);
1017 vmci_ctx_destroy(host_context);
1018 vmci_qp_broker_exit();
1020 pr_debug("VMCI host driver module unloaded\n");