+ /* struct procinfo_coalinfo; */
+
+ switch (flavor) {
+ case LISTCOALITIONS_ALL_COALS:
+ elem_size = LISTCOALITIONS_ALL_COALS_SIZE;
+ coal_type = -1;
+ break;
+ case LISTCOALITIONS_SINGLE_TYPE:
+ elem_size = LISTCOALITIONS_SINGLE_TYPE_SIZE;
+ coal_type = type;
+ break;
+ default:
+ return EINVAL;
+ }
+
+ /* find the total number of coalitions */
+ ncoals = coalitions_get_list(coal_type, NULL, 0);
+
+ if (ncoals == 0 || buffer == 0 || buffersize == 0) {
+ /*
+ * user just wants buffer size
+ * or there are no coalitions
+ */
+ error = 0;
+ *retval = (int)(ncoals * elem_size);
+ goto out;
+ }
+
+ k_buffersize = ncoals * elem_size;
+ coalinfo = kalloc((vm_size_t)k_buffersize);
+ if (!coalinfo) {
+ error = ENOMEM;
+ goto out;
+ }
+ bzero(coalinfo, k_buffersize);
+
+ switch (flavor) {
+ case LISTCOALITIONS_ALL_COALS:
+ case LISTCOALITIONS_SINGLE_TYPE:
+ ncoals_ = coalitions_get_list(coal_type, coalinfo, ncoals);
+ break;
+ default:
+ panic("memory corruption?!");
+ }
+
+ if (ncoals_ == 0) {
+ /* all the coalitions disappeared... weird but valid */
+ error = 0;
+ *retval = 0;
+ goto out;
+ }
+
+ /*
+ * Some coalitions may have disappeared between our initial check,
+ * and the the actual list acquisition.
+ * Only copy out what we really need.
+ */
+ copyout_sz = k_buffersize;
+ if (ncoals_ < ncoals)
+ copyout_sz = ncoals_ * elem_size;
+
+ /*
+ * copy the list up to user space
+ * (we're guaranteed to have a non-null pointer/size here)
+ */
+ error = copyout(coalinfo, buffer,
+ copyout_sz < buffersize ? copyout_sz : buffersize);
+
+ if (error == 0)
+ *retval = (int)copyout_sz;
+
+out:
+ if (coalinfo)
+ kfree(coalinfo, k_buffersize);
+
+ return error;
+#else
+ /* no coalition support */
+ (void)flavor;
+ (void)type;
+ (void)buffer;
+ (void)buffersize;
+ (void)retval;
+ return ENOTSUP;
+#endif
+}
+
+
+/*************************** proc_can_use_forgeound_hw **************************/
+int proc_can_use_foreground_hw(int pid, user_addr_t u_reason, uint32_t reasonsize, int32_t *retval)
+{
+ proc_t p = PROC_NULL;
+ int error = 0;
+ uint32_t reason = PROC_FGHW_ERROR;
+ uint32_t isBG = 0;
+ task_t task = TASK_NULL;
+#if CONFIG_COALITIONS
+ coalition_t coal = COALITION_NULL;
+#endif
+
+ *retval = 0;
+
+ if (pid <= 0) {
+ error = EINVAL;
+ reason = PROC_FGHW_ERROR;
+ goto out;
+ }
+
+ p = proc_find(pid);
+ if (p == PROC_NULL) {
+ error = ESRCH;
+ reason = PROC_FGHW_ERROR;
+ goto out;
+ }
+
+#if CONFIG_COALITIONS
+ if (p != current_proc() &&
+ !kauth_cred_issuser(kauth_cred_get())) {
+ error = EPERM;
+ reason = PROC_FGHW_ERROR;
+ goto out;
+ }
+
+ task = p->task;
+ task_reference(task);
+ if (coalition_is_leader(task, COALITION_TYPE_JETSAM, &coal) == FALSE) {
+ /* current task is not a coalition leader: find the leader */
+ task_deallocate(task);
+ task = coalition_get_leader(coal);
+ }
+
+ if (task != TASK_NULL) {
+ /*
+ * If task is non-null, then it is the coalition leader of the
+ * current process' coalition. This could be the same task as
+ * the current_task, and that's OK.
+ */
+ uint32_t flags = 0;
+ int role;
+
+ proc_get_darwinbgstate(task, &flags);
+ if ((flags & PROC_FLAG_APPLICATION) != PROC_FLAG_APPLICATION) {
+ /*
+ * Coalition leader is not an application, continue
+ * searching for other ways this task could gain
+ * access to HW
+ */
+ reason = PROC_FGHW_DAEMON_LEADER;
+ goto no_leader;
+ }
+
+ if (proc_get_effective_task_policy(task, TASK_POLICY_DARWIN_BG)) {
+ /*
+ * If the leader of the current process' coalition has
+ * been marked as DARWIN_BG, then it definitely should
+ * not be using foreground hardware resources.
+ */
+ reason = PROC_FGHW_LEADER_BACKGROUND;
+ goto out;
+ }
+
+ role = proc_get_effective_task_policy(task, TASK_POLICY_ROLE);
+ switch (role) {
+ case TASK_FOREGROUND_APPLICATION: /* DARWIN_ROLE_UI_FOCAL */
+ case TASK_BACKGROUND_APPLICATION: /* DARWIN_ROLE_UI */
+ /*
+ * The leader of this coalition is a focal, UI app:
+ * access granted
+ * TODO: should extensions/plugins be allowed to use
+ * this hardware?
+ */
+ *retval = 1;
+ reason = PROC_FGHW_OK;
+ goto out;
+ case TASK_DEFAULT_APPLICATION: /* DARWIN_ROLE_UI_NON_FOCAL */
+ case TASK_NONUI_APPLICATION: /* DARWIN_ROLE_NON_UI */
+ case TASK_THROTTLE_APPLICATION:
+ case TASK_UNSPECIFIED:
+ default:
+ /* non-focal, non-ui apps don't get access */
+ reason = PROC_FGHW_LEADER_NONUI;
+ goto out;
+ }
+ }
+
+no_leader:
+ if (task != TASK_NULL) {
+ task_deallocate(task);
+ task = TASK_NULL;
+ }
+#endif /* CONFIG_COALITIONS */
+
+ /*
+ * There is no reasonable semantic to investigate the currently
+ * adopted voucher of an arbitrary thread in a non-current process.
+ * We return '0'
+ */
+ if (p != current_proc()) {
+ error = EINVAL;
+ goto out;
+ }
+
+ /*
+ * In the absence of coalitions, fall back to a voucher-based lookup
+ * where a daemon can used foreground HW if it's operating on behalf
+ * of a foreground application.
+ * NOTE: this is equivalent to a call to
+ * proc_pidoriginatorinfo(PROC_PIDORIGINATOR_BGSTATE, &isBG, sizeof(isBG))
+ */
+ isBG = 1;
+ error = proc_get_originatorbgstate(&isBG);
+ switch (error) {
+ case 0:
+ break;
+ case ESRCH:
+ reason = PROC_FGHW_NO_ORIGINATOR;
+ error = 0;
+ goto out;
+ case ENOATTR:
+ reason = PROC_FGHW_NO_VOUCHER_ATTR;
+ error = 0;
+ goto out;
+ case EINVAL:
+ reason = PROC_FGHW_DAEMON_NO_VOUCHER;
+ error = 0;
+ goto out;
+ default:
+ /* some other error occurred: report that to the caller */
+ reason = PROC_FGHW_VOUCHER_ERROR;
+ goto out;
+ }
+
+ if (isBG) {
+ reason = PROC_FGHW_ORIGINATOR_BACKGROUND;
+ error = 0;
+ } else {
+ /*
+ * The process itself is either a foreground app, or has
+ * adopted a voucher originating from an app that's still in
+ * the foreground
+ */
+ reason = PROC_FGHW_DAEMON_OK;
+ *retval = 1;
+ }
+
+out:
+ if (task != TASK_NULL)
+ task_deallocate(task);
+ if (p != PROC_NULL)
+ proc_rele(p);
+ if (reasonsize >= sizeof(reason) && u_reason != (user_addr_t)0)
+ (void)copyout(&reason, u_reason, sizeof(reason));
+ return error;
+}
+
+
+/********************************** proc_pidinfo ********************************/
+
+
+int
+proc_pidinfo(int pid, int flavor, uint64_t arg, user_addr_t buffer, uint32_t buffersize, int32_t * retval)
+{
+ struct proc * p = PROC_NULL;
+ int error = ENOTSUP;
+ int gotref = 0;
+ int findzomb = 0;
+ int shortversion = 0;
+ uint32_t size;
+ int zombie = 0;
+ int thuniqueid = 0;
+ int uniqidversion = 0;
+ boolean_t check_same_user;
+
+ switch (flavor) {
+ case PROC_PIDLISTFDS:
+ size = PROC_PIDLISTFD_SIZE;
+ if (buffer == (user_addr_t)0)
+ size = 0;
+ break;
+ case PROC_PIDTBSDINFO:
+ size = PROC_PIDTBSDINFO_SIZE;
+ break;
+ case PROC_PIDTASKINFO:
+ size = PROC_PIDTASKINFO_SIZE;
+ break;
+ case PROC_PIDTASKALLINFO:
+ size = PROC_PIDTASKALLINFO_SIZE;
+ break;
+ case PROC_PIDTHREADINFO:
+ size = PROC_PIDTHREADINFO_SIZE;
+ break;
+ case PROC_PIDLISTTHREADS:
+ size = PROC_PIDLISTTHREADS_SIZE;
+ break;
+ case PROC_PIDREGIONINFO:
+ size = PROC_PIDREGIONINFO_SIZE;
+ break;
+ case PROC_PIDREGIONPATHINFO:
+ size = PROC_PIDREGIONPATHINFO_SIZE;
+ break;
+ case PROC_PIDVNODEPATHINFO:
+ size = PROC_PIDVNODEPATHINFO_SIZE;
+ break;
+ case PROC_PIDTHREADPATHINFO:
+ size = PROC_PIDTHREADPATHINFO_SIZE;
+ break;
+ case PROC_PIDPATHINFO:
+ size = MAXPATHLEN;
+ break;
+ case PROC_PIDWORKQUEUEINFO:
+ /* kernel does not have workq info */
+ if (pid == 0)
+ return(EINVAL);
+ else
+ size = PROC_PIDWORKQUEUEINFO_SIZE;
+ break;
+ case PROC_PIDT_SHORTBSDINFO:
+ size = PROC_PIDT_SHORTBSDINFO_SIZE;
+ break;
+ case PROC_PIDLISTFILEPORTS:
+ size = PROC_PIDLISTFILEPORTS_SIZE;
+ if (buffer == (user_addr_t)0)
+ size = 0;
+ break;
+ case PROC_PIDTHREADID64INFO:
+ size = PROC_PIDTHREADID64INFO_SIZE;
+ break;
+ case PROC_PIDUNIQIDENTIFIERINFO:
+ size = PROC_PIDUNIQIDENTIFIERINFO_SIZE;
+ break;
+ case PROC_PIDT_BSDINFOWITHUNIQID:
+ size = PROC_PIDT_BSDINFOWITHUNIQID_SIZE;
+ break;
+ case PROC_PIDARCHINFO:
+ size = PROC_PIDARCHINFO_SIZE;
+ break;
+ case PROC_PIDCOALITIONINFO:
+ size = PROC_PIDCOALITIONINFO_SIZE;
+ break;
+ case PROC_PIDNOTEEXIT:
+ /*
+ * Set findzomb explicitly because arg passed
+ * in is used as note exit status bits.
+ */
+ size = PROC_PIDNOTEEXIT_SIZE;
+ findzomb = 1;
+ break;
+ case PROC_PIDREGIONPATHINFO2:
+ size = PROC_PIDREGIONPATHINFO2_SIZE;
+ break;
+ case PROC_PIDREGIONPATHINFO3:
+ size = PROC_PIDREGIONPATHINFO3_SIZE;
+ break;
+ default:
+ return(EINVAL);
+ }
+
+ if (buffersize < size)
+ return(ENOMEM);
+
+ if ((flavor == PROC_PIDPATHINFO) && (buffersize > PROC_PIDPATHINFO_MAXSIZE)) {
+ return(EOVERFLOW);
+ }
+
+ /* Check if we need to look for zombies */
+ if ((flavor == PROC_PIDTBSDINFO) || (flavor == PROC_PIDT_SHORTBSDINFO) || (flavor == PROC_PIDT_BSDINFOWITHUNIQID)
+ || (flavor == PROC_PIDUNIQIDENTIFIERINFO)) {
+ if (arg)
+ findzomb = 1;
+ }
+
+ if ((p = proc_find(pid)) == PROC_NULL) {
+ if (findzomb)
+ p = proc_find_zombref(pid);
+ if (p == PROC_NULL) {
+ error = ESRCH;
+ goto out;
+ }
+ zombie = 1;
+ } else {
+ gotref = 1;
+ }
+
+ /* Certain operations don't require privileges */
+ switch (flavor) {
+ case PROC_PIDT_SHORTBSDINFO:
+ case PROC_PIDUNIQIDENTIFIERINFO:
+ case PROC_PIDPATHINFO:
+ case PROC_PIDCOALITIONINFO:
+ check_same_user = NO_CHECK_SAME_USER;
+ break;
+ default:
+ check_same_user = CHECK_SAME_USER;
+ break;
+ }
+
+ /* Do we have permission to look into this? */
+ if ((error = proc_security_policy(p, PROC_INFO_CALL_PIDINFO, flavor, check_same_user)))
+ goto out;
+
+ switch (flavor) {
+ case PROC_PIDLISTFDS: {
+ error = proc_pidfdlist(p, buffer, buffersize, retval);
+ }
+ break;
+
+ case PROC_PIDUNIQIDENTIFIERINFO: {
+ struct proc_uniqidentifierinfo p_uniqidinfo;
+
+ proc_piduniqidentifierinfo(p, &p_uniqidinfo);
+ error = copyout(&p_uniqidinfo, buffer, sizeof(struct proc_uniqidentifierinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_uniqidentifierinfo);
+ }
+ break;
+
+ case PROC_PIDT_SHORTBSDINFO:
+ shortversion = 1;
+ case PROC_PIDT_BSDINFOWITHUNIQID:
+ case PROC_PIDTBSDINFO: {
+ struct proc_bsdinfo pbsd;
+ struct proc_bsdshortinfo pbsd_short;
+ struct proc_bsdinfowithuniqid pbsd_uniqid;
+
+ if (flavor == PROC_PIDT_BSDINFOWITHUNIQID)
+ uniqidversion = 1;
+
+ if (shortversion != 0) {
+ error = proc_pidshortbsdinfo(p, &pbsd_short, zombie);
+ } else {
+ error = proc_pidbsdinfo(p, &pbsd, zombie);
+ if (uniqidversion != 0) {
+ proc_piduniqidentifierinfo(p, &pbsd_uniqid.p_uniqidentifier);
+ pbsd_uniqid.pbsd = pbsd;
+ }
+ }
+
+ if (error == 0) {
+ if (shortversion != 0) {
+ error = copyout(&pbsd_short, buffer, sizeof(struct proc_bsdshortinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_bsdshortinfo);
+ } else if (uniqidversion != 0) {
+ error = copyout(&pbsd_uniqid, buffer, sizeof(struct proc_bsdinfowithuniqid));
+ if (error == 0)
+ *retval = sizeof(struct proc_bsdinfowithuniqid);
+ } else {
+ error = copyout(&pbsd, buffer, sizeof(struct proc_bsdinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_bsdinfo);
+ }
+ }
+ }
+ break;
+
+ case PROC_PIDTASKINFO: {
+ struct proc_taskinfo ptinfo;
+
+ error = proc_pidtaskinfo(p, &ptinfo);
+ if (error == 0) {
+ error = copyout(&ptinfo, buffer, sizeof(struct proc_taskinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_taskinfo);
+ }
+ }
+ break;
+
+ case PROC_PIDTASKALLINFO: {
+ struct proc_taskallinfo pall;
+
+ error = proc_pidbsdinfo(p, &pall.pbsd, 0);
+ error = proc_pidtaskinfo(p, &pall.ptinfo);
+ if (error == 0) {
+ error = copyout(&pall, buffer, sizeof(struct proc_taskallinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_taskallinfo);
+ }
+ }
+ break;
+
+ case PROC_PIDTHREADID64INFO:
+ thuniqueid = 1;
+ case PROC_PIDTHREADINFO:{
+ struct proc_threadinfo pthinfo;
+
+ error = proc_pidthreadinfo(p, arg, thuniqueid, &pthinfo);
+ if (error == 0) {
+ error = copyout(&pthinfo, buffer, sizeof(struct proc_threadinfo));
+ if (error == 0)
+ *retval = sizeof(struct proc_threadinfo);
+ }
+ }
+ break;
+
+ case PROC_PIDLISTTHREADS:{
+ error = proc_pidlistthreads(p, buffer, buffersize, retval);
+ }
projects / apple / xnu.git / blobdiff