17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 502ff05a9Svsakar * Common Development and Distribution License (the "License"). 602ff05a9Svsakar * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 2217965fd8SKrishnendu Sadhukhan - Sun Microsystems * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 249d12795fSRobert Mustacchi * Copyright 2015, Joyent, Inc. All rights reserved. 25*6430daecSBrandon Baker * Copyright (c) 2016 by Delphix. All rights reserved. 267c478bd9Sstevel@tonic-gate */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 297c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate /* 327c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 337c478bd9Sstevel@tonic-gate * The Regents of the University of California 347c478bd9Sstevel@tonic-gate * All Rights Reserved 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 377c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 387c478bd9Sstevel@tonic-gate * contributors. 397c478bd9Sstevel@tonic-gate */ 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate /* 427c478bd9Sstevel@tonic-gate * VM - address spaces. 437c478bd9Sstevel@tonic-gate */ 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate #include <sys/types.h> 467c478bd9Sstevel@tonic-gate #include <sys/t_lock.h> 477c478bd9Sstevel@tonic-gate #include <sys/param.h> 487c478bd9Sstevel@tonic-gate #include <sys/errno.h> 497c478bd9Sstevel@tonic-gate #include <sys/systm.h> 507c478bd9Sstevel@tonic-gate #include <sys/mman.h> 517c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 527c478bd9Sstevel@tonic-gate #include <sys/cpuvar.h> 537c478bd9Sstevel@tonic-gate #include <sys/sysinfo.h> 547c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 557c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 567c478bd9Sstevel@tonic-gate #include <sys/vmsystm.h> 577c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 587c478bd9Sstevel@tonic-gate #include <sys/debug.h> 597c478bd9Sstevel@tonic-gate #include <sys/tnf_probe.h> 607c478bd9Sstevel@tonic-gate #include <sys/vtrace.h> 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate #include <vm/hat.h> 637c478bd9Sstevel@tonic-gate #include <vm/as.h> 647c478bd9Sstevel@tonic-gate #include <vm/seg.h> 657c478bd9Sstevel@tonic-gate #include <vm/seg_vn.h> 667c478bd9Sstevel@tonic-gate #include <vm/seg_dev.h> 677c478bd9Sstevel@tonic-gate #include <vm/seg_kmem.h> 687c478bd9Sstevel@tonic-gate #include <vm/seg_map.h> 697c478bd9Sstevel@tonic-gate #include <vm/seg_spt.h> 707c478bd9Sstevel@tonic-gate #include <vm/page.h> 717c478bd9Sstevel@tonic-gate 727c478bd9Sstevel@tonic-gate clock_t deadlk_wait = 1; /* number of ticks to wait before retrying */ 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate static struct kmem_cache *as_cache; 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate static void as_setwatchprot(struct as *, caddr_t, size_t, uint_t); 777c478bd9Sstevel@tonic-gate static void as_clearwatchprot(struct as *, caddr_t, size_t); 7802ff05a9Svsakar int as_map_locked(struct as *, caddr_t, size_t, int ((*)()), void *); 797c478bd9Sstevel@tonic-gate 807c478bd9Sstevel@tonic-gate 817c478bd9Sstevel@tonic-gate /* 827c478bd9Sstevel@tonic-gate * Verifying the segment lists is very time-consuming; it may not be 837c478bd9Sstevel@tonic-gate * desirable always to define VERIFY_SEGLIST when DEBUG is set. 847c478bd9Sstevel@tonic-gate */ 857c478bd9Sstevel@tonic-gate #ifdef DEBUG 867c478bd9Sstevel@tonic-gate #define VERIFY_SEGLIST 877c478bd9Sstevel@tonic-gate int do_as_verify = 0; 887c478bd9Sstevel@tonic-gate #endif 897c478bd9Sstevel@tonic-gate 907c478bd9Sstevel@tonic-gate /* 917c478bd9Sstevel@tonic-gate * Allocate a new callback data structure entry and fill in the events of 927c478bd9Sstevel@tonic-gate * interest, the address range of interest, and the callback argument. 937c478bd9Sstevel@tonic-gate * Link the entry on the as->a_callbacks list. A callback entry for the 947c478bd9Sstevel@tonic-gate * entire address space may be specified with vaddr = 0 and size = -1. 957c478bd9Sstevel@tonic-gate * 967c478bd9Sstevel@tonic-gate * CALLERS RESPONSIBILITY: If not calling from within the process context for 977c478bd9Sstevel@tonic-gate * the specified as, the caller must guarantee persistence of the specified as 987c478bd9Sstevel@tonic-gate * for the duration of this function (eg. pages being locked within the as 997c478bd9Sstevel@tonic-gate * will guarantee persistence). 1007c478bd9Sstevel@tonic-gate */ 1017c478bd9Sstevel@tonic-gate int 1027c478bd9Sstevel@tonic-gate as_add_callback(struct as *as, void (*cb_func)(), void *arg, uint_t events, 103*6430daecSBrandon Baker caddr_t vaddr, size_t size, int sleepflag) 1047c478bd9Sstevel@tonic-gate { 1057c478bd9Sstevel@tonic-gate struct as_callback *current_head, *cb; 1067c478bd9Sstevel@tonic-gate caddr_t saddr; 1077c478bd9Sstevel@tonic-gate size_t rsize; 1087c478bd9Sstevel@tonic-gate 1097c478bd9Sstevel@tonic-gate /* callback function and an event are mandatory */ 1107c478bd9Sstevel@tonic-gate if ((cb_func == NULL) || ((events & AS_ALL_EVENT) == 0)) 1117c478bd9Sstevel@tonic-gate return (EINVAL); 1127c478bd9Sstevel@tonic-gate 1137c478bd9Sstevel@tonic-gate /* Adding a callback after as_free has been called is not allowed */ 1147c478bd9Sstevel@tonic-gate if (as == &kas) 1157c478bd9Sstevel@tonic-gate return (ENOMEM); 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate /* 1187c478bd9Sstevel@tonic-gate * vaddr = 0 and size = -1 is used to indicate that the callback range 1197c478bd9Sstevel@tonic-gate * is the entire address space so no rounding is done in that case. 1207c478bd9Sstevel@tonic-gate */ 1217c478bd9Sstevel@tonic-gate if (size != -1) { 1227c478bd9Sstevel@tonic-gate saddr = (caddr_t)((uintptr_t)vaddr & (uintptr_t)PAGEMASK); 1237c478bd9Sstevel@tonic-gate rsize = (((size_t)(vaddr + size) + PAGEOFFSET) & PAGEMASK) - 124843e1988Sjohnlev (size_t)saddr; 1257c478bd9Sstevel@tonic-gate /* check for wraparound */ 1267c478bd9Sstevel@tonic-gate if (saddr + rsize < saddr) 1277c478bd9Sstevel@tonic-gate return (ENOMEM); 1287c478bd9Sstevel@tonic-gate } else { 1297c478bd9Sstevel@tonic-gate if (vaddr != 0) 1307c478bd9Sstevel@tonic-gate return (EINVAL); 1317c478bd9Sstevel@tonic-gate saddr = vaddr; 1327c478bd9Sstevel@tonic-gate rsize = size; 1337c478bd9Sstevel@tonic-gate } 1347c478bd9Sstevel@tonic-gate 1357c478bd9Sstevel@tonic-gate /* Allocate and initialize a callback entry */ 1367c478bd9Sstevel@tonic-gate cb = kmem_zalloc(sizeof (struct as_callback), sleepflag); 1377c478bd9Sstevel@tonic-gate if (cb == NULL) 1387c478bd9Sstevel@tonic-gate return (EAGAIN); 1397c478bd9Sstevel@tonic-gate 1407c478bd9Sstevel@tonic-gate cb->ascb_func = cb_func; 1417c478bd9Sstevel@tonic-gate cb->ascb_arg = arg; 1427c478bd9Sstevel@tonic-gate cb->ascb_events = events; 1437c478bd9Sstevel@tonic-gate cb->ascb_saddr = saddr; 1447c478bd9Sstevel@tonic-gate cb->ascb_len = rsize; 1457c478bd9Sstevel@tonic-gate 1467c478bd9Sstevel@tonic-gate /* Add the entry to the list */ 1477c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 1487c478bd9Sstevel@tonic-gate current_head = as->a_callbacks; 1497c478bd9Sstevel@tonic-gate as->a_callbacks = cb; 1507c478bd9Sstevel@tonic-gate cb->ascb_next = current_head; 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate /* 1537c478bd9Sstevel@tonic-gate * The call to this function may lose in a race with 1547c478bd9Sstevel@tonic-gate * a pertinent event - eg. a thread does long term memory locking 1557c478bd9Sstevel@tonic-gate * but before the callback is added another thread executes as_unmap. 1567c478bd9Sstevel@tonic-gate * A broadcast here resolves that. 1577c478bd9Sstevel@tonic-gate */ 1587c478bd9Sstevel@tonic-gate if ((cb->ascb_events & AS_UNMAPWAIT_EVENT) && AS_ISUNMAPWAIT(as)) { 1597c478bd9Sstevel@tonic-gate AS_CLRUNMAPWAIT(as); 1607c478bd9Sstevel@tonic-gate cv_broadcast(&as->a_cv); 1617c478bd9Sstevel@tonic-gate } 1627c478bd9Sstevel@tonic-gate 1637c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 1647c478bd9Sstevel@tonic-gate return (0); 1657c478bd9Sstevel@tonic-gate } 1667c478bd9Sstevel@tonic-gate 1677c478bd9Sstevel@tonic-gate /* 1687c478bd9Sstevel@tonic-gate * Search the callback list for an entry which pertains to arg. 1697c478bd9Sstevel@tonic-gate * 1707c478bd9Sstevel@tonic-gate * This is called from within the client upon completion of the callback. 1717c478bd9Sstevel@tonic-gate * RETURN VALUES: 1727c478bd9Sstevel@tonic-gate * AS_CALLBACK_DELETED (callback entry found and deleted) 1737c478bd9Sstevel@tonic-gate * AS_CALLBACK_NOTFOUND (no callback entry found - this is ok) 1747c478bd9Sstevel@tonic-gate * AS_CALLBACK_DELETE_DEFERRED (callback is in process, delete of this 1757c478bd9Sstevel@tonic-gate * entry will be made in as_do_callbacks) 1767c478bd9Sstevel@tonic-gate * 1777c478bd9Sstevel@tonic-gate * If as_delete_callback encounters a matching entry with AS_CALLBACK_CALLED 1787c478bd9Sstevel@tonic-gate * set, it indicates that as_do_callbacks is processing this entry. The 1797c478bd9Sstevel@tonic-gate * AS_ALL_EVENT events are cleared in the entry, and a broadcast is made 1807c478bd9Sstevel@tonic-gate * to unblock as_do_callbacks, in case it is blocked. 1817c478bd9Sstevel@tonic-gate * 1827c478bd9Sstevel@tonic-gate * CALLERS RESPONSIBILITY: If not calling from within the process context for 1837c478bd9Sstevel@tonic-gate * the specified as, the caller must guarantee persistence of the specified as 1847c478bd9Sstevel@tonic-gate * for the duration of this function (eg. pages being locked within the as 1857c478bd9Sstevel@tonic-gate * will guarantee persistence). 1867c478bd9Sstevel@tonic-gate */ 1877c478bd9Sstevel@tonic-gate uint_t 1887c478bd9Sstevel@tonic-gate as_delete_callback(struct as *as, void *arg) 1897c478bd9Sstevel@tonic-gate { 1907c478bd9Sstevel@tonic-gate struct as_callback **prevcb = &as->a_callbacks; 1917c478bd9Sstevel@tonic-gate struct as_callback *cb; 1927c478bd9Sstevel@tonic-gate uint_t rc = AS_CALLBACK_NOTFOUND; 1937c478bd9Sstevel@tonic-gate 1947c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 1957c478bd9Sstevel@tonic-gate for (cb = as->a_callbacks; cb; prevcb = &cb->ascb_next, cb = *prevcb) { 1967c478bd9Sstevel@tonic-gate if (cb->ascb_arg != arg) 1977c478bd9Sstevel@tonic-gate continue; 1987c478bd9Sstevel@tonic-gate 1997c478bd9Sstevel@tonic-gate /* 2007c478bd9Sstevel@tonic-gate * If the events indicate AS_CALLBACK_CALLED, just clear 2017c478bd9Sstevel@tonic-gate * AS_ALL_EVENT in the events field and wakeup the thread 2027c478bd9Sstevel@tonic-gate * that may be waiting in as_do_callbacks. as_do_callbacks 2037c478bd9Sstevel@tonic-gate * will take care of removing this entry from the list. In 2047c478bd9Sstevel@tonic-gate * that case, return AS_CALLBACK_DELETE_DEFERRED. Otherwise 2057c478bd9Sstevel@tonic-gate * (AS_CALLBACK_CALLED not set), just remove it from the 2067c478bd9Sstevel@tonic-gate * list, return the memory and return AS_CALLBACK_DELETED. 2077c478bd9Sstevel@tonic-gate */ 2087c478bd9Sstevel@tonic-gate if ((cb->ascb_events & AS_CALLBACK_CALLED) != 0) { 2097c478bd9Sstevel@tonic-gate /* leave AS_CALLBACK_CALLED */ 2107c478bd9Sstevel@tonic-gate cb->ascb_events &= ~AS_ALL_EVENT; 2117c478bd9Sstevel@tonic-gate rc = AS_CALLBACK_DELETE_DEFERRED; 2127c478bd9Sstevel@tonic-gate cv_broadcast(&as->a_cv); 2137c478bd9Sstevel@tonic-gate } else { 2147c478bd9Sstevel@tonic-gate *prevcb = cb->ascb_next; 2157c478bd9Sstevel@tonic-gate kmem_free(cb, sizeof (struct as_callback)); 2167c478bd9Sstevel@tonic-gate rc = AS_CALLBACK_DELETED; 2177c478bd9Sstevel@tonic-gate } 2187c478bd9Sstevel@tonic-gate break; 2197c478bd9Sstevel@tonic-gate } 2207c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 2217c478bd9Sstevel@tonic-gate return (rc); 2227c478bd9Sstevel@tonic-gate } 2237c478bd9Sstevel@tonic-gate 2247c478bd9Sstevel@tonic-gate /* 2257c478bd9Sstevel@tonic-gate * Searches the as callback list for a matching entry. 2267c478bd9Sstevel@tonic-gate * Returns a pointer to the first matching callback, or NULL if 2277c478bd9Sstevel@tonic-gate * nothing is found. 2287c478bd9Sstevel@tonic-gate * This function never sleeps so it is ok to call it with more 2297c478bd9Sstevel@tonic-gate * locks held but the (required) a_contents mutex. 2307c478bd9Sstevel@tonic-gate * 2317c478bd9Sstevel@tonic-gate * See also comment on as_do_callbacks below. 2327c478bd9Sstevel@tonic-gate */ 2337c478bd9Sstevel@tonic-gate static struct as_callback * 2347c478bd9Sstevel@tonic-gate as_find_callback(struct as *as, uint_t events, caddr_t event_addr, 235*6430daecSBrandon Baker size_t event_len) 2367c478bd9Sstevel@tonic-gate { 2377c478bd9Sstevel@tonic-gate struct as_callback *cb; 2387c478bd9Sstevel@tonic-gate 2397c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&as->a_contents)); 2407c478bd9Sstevel@tonic-gate for (cb = as->a_callbacks; cb != NULL; cb = cb->ascb_next) { 2417c478bd9Sstevel@tonic-gate /* 2427c478bd9Sstevel@tonic-gate * If the callback has not already been called, then 2437c478bd9Sstevel@tonic-gate * check if events or address range pertains. An event_len 2447c478bd9Sstevel@tonic-gate * of zero means do an unconditional callback. 2457c478bd9Sstevel@tonic-gate */ 2467c478bd9Sstevel@tonic-gate if (((cb->ascb_events & AS_CALLBACK_CALLED) != 0) || 2477c478bd9Sstevel@tonic-gate ((event_len != 0) && (((cb->ascb_events & events) == 0) || 2487c478bd9Sstevel@tonic-gate (event_addr + event_len < cb->ascb_saddr) || 2497c478bd9Sstevel@tonic-gate (event_addr > (cb->ascb_saddr + cb->ascb_len))))) { 2507c478bd9Sstevel@tonic-gate continue; 2517c478bd9Sstevel@tonic-gate } 2527c478bd9Sstevel@tonic-gate break; 2537c478bd9Sstevel@tonic-gate } 2547c478bd9Sstevel@tonic-gate return (cb); 2557c478bd9Sstevel@tonic-gate } 2567c478bd9Sstevel@tonic-gate 2577c478bd9Sstevel@tonic-gate /* 2587c478bd9Sstevel@tonic-gate * Executes a given callback and removes it from the callback list for 2597c478bd9Sstevel@tonic-gate * this address space. 2607c478bd9Sstevel@tonic-gate * This function may sleep so the caller must drop all locks except 2617c478bd9Sstevel@tonic-gate * a_contents before calling this func. 2627c478bd9Sstevel@tonic-gate * 2637c478bd9Sstevel@tonic-gate * See also comments on as_do_callbacks below. 2647c478bd9Sstevel@tonic-gate */ 2657c478bd9Sstevel@tonic-gate static void 2667c478bd9Sstevel@tonic-gate as_execute_callback(struct as *as, struct as_callback *cb, 267*6430daecSBrandon Baker uint_t events) 2687c478bd9Sstevel@tonic-gate { 2697c478bd9Sstevel@tonic-gate struct as_callback **prevcb; 2707c478bd9Sstevel@tonic-gate void *cb_arg; 2717c478bd9Sstevel@tonic-gate 2727c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&as->a_contents) && (cb->ascb_events & events)); 2737c478bd9Sstevel@tonic-gate cb->ascb_events |= AS_CALLBACK_CALLED; 2747c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 2757c478bd9Sstevel@tonic-gate (*cb->ascb_func)(as, cb->ascb_arg, events); 2767c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 2777c478bd9Sstevel@tonic-gate /* 2787c478bd9Sstevel@tonic-gate * the callback function is required to delete the callback 2797c478bd9Sstevel@tonic-gate * when the callback function determines it is OK for 2807c478bd9Sstevel@tonic-gate * this thread to continue. as_delete_callback will clear 2817c478bd9Sstevel@tonic-gate * the AS_ALL_EVENT in the events field when it is deleted. 2827c478bd9Sstevel@tonic-gate * If the callback function called as_delete_callback, 2837c478bd9Sstevel@tonic-gate * events will already be cleared and there will be no blocking. 2847c478bd9Sstevel@tonic-gate */ 2857c478bd9Sstevel@tonic-gate while ((cb->ascb_events & events) != 0) { 2867c478bd9Sstevel@tonic-gate cv_wait(&as->a_cv, &as->a_contents); 2877c478bd9Sstevel@tonic-gate } 2887c478bd9Sstevel@tonic-gate /* 2897c478bd9Sstevel@tonic-gate * This entry needs to be taken off the list. Normally, the 2907c478bd9Sstevel@tonic-gate * callback func itself does that, but unfortunately the list 2917c478bd9Sstevel@tonic-gate * may have changed while the callback was running because the 2927c478bd9Sstevel@tonic-gate * a_contents mutex was dropped and someone else other than the 2937c478bd9Sstevel@tonic-gate * callback func itself could have called as_delete_callback, 2947c478bd9Sstevel@tonic-gate * so we have to search to find this entry again. The entry 2957c478bd9Sstevel@tonic-gate * must have AS_CALLBACK_CALLED, and have the same 'arg'. 2967c478bd9Sstevel@tonic-gate */ 2977c478bd9Sstevel@tonic-gate cb_arg = cb->ascb_arg; 2987c478bd9Sstevel@tonic-gate prevcb = &as->a_callbacks; 2997c478bd9Sstevel@tonic-gate for (cb = as->a_callbacks; cb != NULL; 3007c478bd9Sstevel@tonic-gate prevcb = &cb->ascb_next, cb = *prevcb) { 3017c478bd9Sstevel@tonic-gate if (((cb->ascb_events & AS_CALLBACK_CALLED) == 0) || 3027c478bd9Sstevel@tonic-gate (cb_arg != cb->ascb_arg)) { 3037c478bd9Sstevel@tonic-gate continue; 3047c478bd9Sstevel@tonic-gate } 3057c478bd9Sstevel@tonic-gate *prevcb = cb->ascb_next; 3067c478bd9Sstevel@tonic-gate kmem_free(cb, sizeof (struct as_callback)); 3077c478bd9Sstevel@tonic-gate break; 3087c478bd9Sstevel@tonic-gate } 3097c478bd9Sstevel@tonic-gate } 3107c478bd9Sstevel@tonic-gate 3117c478bd9Sstevel@tonic-gate /* 3127c478bd9Sstevel@tonic-gate * Check the callback list for a matching event and intersection of 3137c478bd9Sstevel@tonic-gate * address range. If there is a match invoke the callback. Skip an entry if: 3147c478bd9Sstevel@tonic-gate * - a callback is already in progress for this entry (AS_CALLBACK_CALLED) 3157c478bd9Sstevel@tonic-gate * - not event of interest 3167c478bd9Sstevel@tonic-gate * - not address range of interest 3177c478bd9Sstevel@tonic-gate * 3187c478bd9Sstevel@tonic-gate * An event_len of zero indicates a request for an unconditional callback 3197c478bd9Sstevel@tonic-gate * (regardless of event), only the AS_CALLBACK_CALLED is checked. The 3207c478bd9Sstevel@tonic-gate * a_contents lock must be dropped before a callback, so only one callback 3217c478bd9Sstevel@tonic-gate * can be done before returning. Return -1 (true) if a callback was 3227c478bd9Sstevel@tonic-gate * executed and removed from the list, else return 0 (false). 3237c478bd9Sstevel@tonic-gate * 3247c478bd9Sstevel@tonic-gate * The logically separate parts, i.e. finding a matching callback and 3257c478bd9Sstevel@tonic-gate * executing a given callback have been separated into two functions 3267c478bd9Sstevel@tonic-gate * so that they can be called with different sets of locks held beyond 3277c478bd9Sstevel@tonic-gate * the always-required a_contents. as_find_callback does not sleep so 3287c478bd9Sstevel@tonic-gate * it is ok to call it if more locks than a_contents (i.e. the a_lock 3297c478bd9Sstevel@tonic-gate * rwlock) are held. as_execute_callback on the other hand may sleep 3307c478bd9Sstevel@tonic-gate * so all locks beyond a_contents must be dropped by the caller if one 3317c478bd9Sstevel@tonic-gate * does not want to end comatose. 3327c478bd9Sstevel@tonic-gate */ 3337c478bd9Sstevel@tonic-gate static int 3347c478bd9Sstevel@tonic-gate as_do_callbacks(struct as *as, uint_t events, caddr_t event_addr, 335*6430daecSBrandon Baker size_t event_len) 3367c478bd9Sstevel@tonic-gate { 3377c478bd9Sstevel@tonic-gate struct as_callback *cb; 3387c478bd9Sstevel@tonic-gate 3397c478bd9Sstevel@tonic-gate if ((cb = as_find_callback(as, events, event_addr, event_len))) { 3407c478bd9Sstevel@tonic-gate as_execute_callback(as, cb, events); 3417c478bd9Sstevel@tonic-gate return (-1); 3427c478bd9Sstevel@tonic-gate } 3437c478bd9Sstevel@tonic-gate return (0); 3447c478bd9Sstevel@tonic-gate } 3457c478bd9Sstevel@tonic-gate 3467c478bd9Sstevel@tonic-gate /* 3477c478bd9Sstevel@tonic-gate * Search for the segment containing addr. If a segment containing addr 3487c478bd9Sstevel@tonic-gate * exists, that segment is returned. If no such segment exists, and 3497c478bd9Sstevel@tonic-gate * the list spans addresses greater than addr, then the first segment 3507c478bd9Sstevel@tonic-gate * whose base is greater than addr is returned; otherwise, NULL is 3517c478bd9Sstevel@tonic-gate * returned unless tail is true, in which case the last element of the 3527c478bd9Sstevel@tonic-gate * list is returned. 3537c478bd9Sstevel@tonic-gate * 3547c478bd9Sstevel@tonic-gate * a_seglast is used to cache the last found segment for repeated 3557c478bd9Sstevel@tonic-gate * searches to the same addr (which happens frequently). 3567c478bd9Sstevel@tonic-gate */ 3577c478bd9Sstevel@tonic-gate struct seg * 3587c478bd9Sstevel@tonic-gate as_findseg(struct as *as, caddr_t addr, int tail) 3597c478bd9Sstevel@tonic-gate { 3607c478bd9Sstevel@tonic-gate struct seg *seg = as->a_seglast; 3617c478bd9Sstevel@tonic-gate avl_index_t where; 3627c478bd9Sstevel@tonic-gate 363dc32d872SJosef 'Jeff' Sipek ASSERT(AS_LOCK_HELD(as)); 3647c478bd9Sstevel@tonic-gate 3657c478bd9Sstevel@tonic-gate if (seg != NULL && 3667c478bd9Sstevel@tonic-gate seg->s_base <= addr && 3677c478bd9Sstevel@tonic-gate addr < seg->s_base + seg->s_size) 3687c478bd9Sstevel@tonic-gate return (seg); 3697c478bd9Sstevel@tonic-gate 3707c478bd9Sstevel@tonic-gate seg = avl_find(&as->a_segtree, &addr, &where); 3717c478bd9Sstevel@tonic-gate if (seg != NULL) 3727c478bd9Sstevel@tonic-gate return (as->a_seglast = seg); 3737c478bd9Sstevel@tonic-gate 3747c478bd9Sstevel@tonic-gate seg = avl_nearest(&as->a_segtree, where, AVL_AFTER); 3757c478bd9Sstevel@tonic-gate if (seg == NULL && tail) 3767c478bd9Sstevel@tonic-gate seg = avl_last(&as->a_segtree); 3777c478bd9Sstevel@tonic-gate return (as->a_seglast = seg); 3787c478bd9Sstevel@tonic-gate } 3797c478bd9Sstevel@tonic-gate 3807c478bd9Sstevel@tonic-gate #ifdef VERIFY_SEGLIST 3817c478bd9Sstevel@tonic-gate /* 3827c478bd9Sstevel@tonic-gate * verify that the linked list is coherent 3837c478bd9Sstevel@tonic-gate */ 3847c478bd9Sstevel@tonic-gate static void 3857c478bd9Sstevel@tonic-gate as_verify(struct as *as) 3867c478bd9Sstevel@tonic-gate { 3877c478bd9Sstevel@tonic-gate struct seg *seg, *seglast, *p, *n; 3887c478bd9Sstevel@tonic-gate uint_t nsegs = 0; 3897c478bd9Sstevel@tonic-gate 3907c478bd9Sstevel@tonic-gate if (do_as_verify == 0) 3917c478bd9Sstevel@tonic-gate return; 3927c478bd9Sstevel@tonic-gate 3937c478bd9Sstevel@tonic-gate seglast = as->a_seglast; 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) { 3967c478bd9Sstevel@tonic-gate ASSERT(seg->s_as == as); 3977c478bd9Sstevel@tonic-gate p = AS_SEGPREV(as, seg); 3987c478bd9Sstevel@tonic-gate n = AS_SEGNEXT(as, seg); 3997c478bd9Sstevel@tonic-gate ASSERT(p == NULL || p->s_as == as); 4007c478bd9Sstevel@tonic-gate ASSERT(p == NULL || p->s_base < seg->s_base); 4017c478bd9Sstevel@tonic-gate ASSERT(n == NULL || n->s_base > seg->s_base); 4027c478bd9Sstevel@tonic-gate ASSERT(n != NULL || seg == avl_last(&as->a_segtree)); 4037c478bd9Sstevel@tonic-gate if (seg == seglast) 4047c478bd9Sstevel@tonic-gate seglast = NULL; 4057c478bd9Sstevel@tonic-gate nsegs++; 4067c478bd9Sstevel@tonic-gate } 4077c478bd9Sstevel@tonic-gate ASSERT(seglast == NULL); 4087c478bd9Sstevel@tonic-gate ASSERT(avl_numnodes(&as->a_segtree) == nsegs); 4097c478bd9Sstevel@tonic-gate } 4107c478bd9Sstevel@tonic-gate #endif /* VERIFY_SEGLIST */ 4117c478bd9Sstevel@tonic-gate 4127c478bd9Sstevel@tonic-gate /* 4137c478bd9Sstevel@tonic-gate * Add a new segment to the address space. The avl_find() 4147c478bd9Sstevel@tonic-gate * may be expensive so we attempt to use last segment accessed 4157c478bd9Sstevel@tonic-gate * in as_gap() as an insertion point. 4167c478bd9Sstevel@tonic-gate */ 4177c478bd9Sstevel@tonic-gate int 4187c478bd9Sstevel@tonic-gate as_addseg(struct as *as, struct seg *newseg) 4197c478bd9Sstevel@tonic-gate { 4207c478bd9Sstevel@tonic-gate struct seg *seg; 4217c478bd9Sstevel@tonic-gate caddr_t addr; 4227c478bd9Sstevel@tonic-gate caddr_t eaddr; 4237c478bd9Sstevel@tonic-gate avl_index_t where; 4247c478bd9Sstevel@tonic-gate 425dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 4267c478bd9Sstevel@tonic-gate 4277c478bd9Sstevel@tonic-gate as->a_updatedir = 1; /* inform /proc */ 4287c478bd9Sstevel@tonic-gate gethrestime(&as->a_updatetime); 4297c478bd9Sstevel@tonic-gate 4307c478bd9Sstevel@tonic-gate if (as->a_lastgaphl != NULL) { 4317c478bd9Sstevel@tonic-gate struct seg *hseg = NULL; 4327c478bd9Sstevel@tonic-gate struct seg *lseg = NULL; 4337c478bd9Sstevel@tonic-gate 4347c478bd9Sstevel@tonic-gate if (as->a_lastgaphl->s_base > newseg->s_base) { 4357c478bd9Sstevel@tonic-gate hseg = as->a_lastgaphl; 4367c478bd9Sstevel@tonic-gate lseg = AVL_PREV(&as->a_segtree, hseg); 4377c478bd9Sstevel@tonic-gate } else { 4387c478bd9Sstevel@tonic-gate lseg = as->a_lastgaphl; 4397c478bd9Sstevel@tonic-gate hseg = AVL_NEXT(&as->a_segtree, lseg); 4407c478bd9Sstevel@tonic-gate } 4417c478bd9Sstevel@tonic-gate 4427c478bd9Sstevel@tonic-gate if (hseg && lseg && lseg->s_base < newseg->s_base && 4437c478bd9Sstevel@tonic-gate hseg->s_base > newseg->s_base) { 4447c478bd9Sstevel@tonic-gate avl_insert_here(&as->a_segtree, newseg, lseg, 4457c478bd9Sstevel@tonic-gate AVL_AFTER); 4467c478bd9Sstevel@tonic-gate as->a_lastgaphl = NULL; 4477c478bd9Sstevel@tonic-gate as->a_seglast = newseg; 4487c478bd9Sstevel@tonic-gate return (0); 4497c478bd9Sstevel@tonic-gate } 4507c478bd9Sstevel@tonic-gate as->a_lastgaphl = NULL; 4517c478bd9Sstevel@tonic-gate } 4527c478bd9Sstevel@tonic-gate 4537c478bd9Sstevel@tonic-gate addr = newseg->s_base; 4547c478bd9Sstevel@tonic-gate eaddr = addr + newseg->s_size; 4557c478bd9Sstevel@tonic-gate again: 4567c478bd9Sstevel@tonic-gate 4577c478bd9Sstevel@tonic-gate seg = avl_find(&as->a_segtree, &addr, &where); 4587c478bd9Sstevel@tonic-gate 4597c478bd9Sstevel@tonic-gate if (seg == NULL) 4607c478bd9Sstevel@tonic-gate seg = avl_nearest(&as->a_segtree, where, AVL_AFTER); 4617c478bd9Sstevel@tonic-gate 4627c478bd9Sstevel@tonic-gate if (seg == NULL) 4637c478bd9Sstevel@tonic-gate seg = avl_last(&as->a_segtree); 4647c478bd9Sstevel@tonic-gate 4657c478bd9Sstevel@tonic-gate if (seg != NULL) { 4667c478bd9Sstevel@tonic-gate caddr_t base = seg->s_base; 4677c478bd9Sstevel@tonic-gate 4687c478bd9Sstevel@tonic-gate /* 4697c478bd9Sstevel@tonic-gate * If top of seg is below the requested address, then 4707c478bd9Sstevel@tonic-gate * the insertion point is at the end of the linked list, 4717c478bd9Sstevel@tonic-gate * and seg points to the tail of the list. Otherwise, 4727c478bd9Sstevel@tonic-gate * the insertion point is immediately before seg. 4737c478bd9Sstevel@tonic-gate */ 4747c478bd9Sstevel@tonic-gate if (base + seg->s_size > addr) { 4757c478bd9Sstevel@tonic-gate if (addr >= base || eaddr > base) { 4767c478bd9Sstevel@tonic-gate #ifdef __sparc 4777c478bd9Sstevel@tonic-gate extern struct seg_ops segnf_ops; 4787c478bd9Sstevel@tonic-gate 4797c478bd9Sstevel@tonic-gate /* 4807c478bd9Sstevel@tonic-gate * no-fault segs must disappear if overlaid. 4817c478bd9Sstevel@tonic-gate * XXX need new segment type so 4827c478bd9Sstevel@tonic-gate * we don't have to check s_ops 4837c478bd9Sstevel@tonic-gate */ 4847c478bd9Sstevel@tonic-gate if (seg->s_ops == &segnf_ops) { 4857c478bd9Sstevel@tonic-gate seg_unmap(seg); 4867c478bd9Sstevel@tonic-gate goto again; 4877c478bd9Sstevel@tonic-gate } 4887c478bd9Sstevel@tonic-gate #endif 4897c478bd9Sstevel@tonic-gate return (-1); /* overlapping segment */ 4907c478bd9Sstevel@tonic-gate } 4917c478bd9Sstevel@tonic-gate } 4927c478bd9Sstevel@tonic-gate } 4937c478bd9Sstevel@tonic-gate as->a_seglast = newseg; 4947c478bd9Sstevel@tonic-gate avl_insert(&as->a_segtree, newseg, where); 4957c478bd9Sstevel@tonic-gate 4967c478bd9Sstevel@tonic-gate #ifdef VERIFY_SEGLIST 4977c478bd9Sstevel@tonic-gate as_verify(as); 4987c478bd9Sstevel@tonic-gate #endif 4997c478bd9Sstevel@tonic-gate return (0); 5007c478bd9Sstevel@tonic-gate } 5017c478bd9Sstevel@tonic-gate 5027c478bd9Sstevel@tonic-gate struct seg * 5037c478bd9Sstevel@tonic-gate as_removeseg(struct as *as, struct seg *seg) 5047c478bd9Sstevel@tonic-gate { 5057c478bd9Sstevel@tonic-gate avl_tree_t *t; 5067c478bd9Sstevel@tonic-gate 507dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 5087c478bd9Sstevel@tonic-gate 5097c478bd9Sstevel@tonic-gate as->a_updatedir = 1; /* inform /proc */ 5107c478bd9Sstevel@tonic-gate gethrestime(&as->a_updatetime); 5117c478bd9Sstevel@tonic-gate 5127c478bd9Sstevel@tonic-gate if (seg == NULL) 5137c478bd9Sstevel@tonic-gate return (NULL); 5147c478bd9Sstevel@tonic-gate 5157c478bd9Sstevel@tonic-gate t = &as->a_segtree; 5167c478bd9Sstevel@tonic-gate if (as->a_seglast == seg) 5177c478bd9Sstevel@tonic-gate as->a_seglast = NULL; 5187c478bd9Sstevel@tonic-gate as->a_lastgaphl = NULL; 5197c478bd9Sstevel@tonic-gate 5207c478bd9Sstevel@tonic-gate /* 5217c478bd9Sstevel@tonic-gate * if this segment is at an address higher than 5227c478bd9Sstevel@tonic-gate * a_lastgap, set a_lastgap to the next segment (NULL if last segment) 5237c478bd9Sstevel@tonic-gate */ 5247c478bd9Sstevel@tonic-gate if (as->a_lastgap && 5257c478bd9Sstevel@tonic-gate (seg == as->a_lastgap || seg->s_base > as->a_lastgap->s_base)) 5267c478bd9Sstevel@tonic-gate as->a_lastgap = AVL_NEXT(t, seg); 5277c478bd9Sstevel@tonic-gate 5287c478bd9Sstevel@tonic-gate /* 5297c478bd9Sstevel@tonic-gate * remove the segment from the seg tree 5307c478bd9Sstevel@tonic-gate */ 5317c478bd9Sstevel@tonic-gate avl_remove(t, seg); 5327c478bd9Sstevel@tonic-gate 5337c478bd9Sstevel@tonic-gate #ifdef VERIFY_SEGLIST 5347c478bd9Sstevel@tonic-gate as_verify(as); 5357c478bd9Sstevel@tonic-gate #endif 5367c478bd9Sstevel@tonic-gate return (seg); 5377c478bd9Sstevel@tonic-gate } 5387c478bd9Sstevel@tonic-gate 5397c478bd9Sstevel@tonic-gate /* 5407c478bd9Sstevel@tonic-gate * Find a segment containing addr. 5417c478bd9Sstevel@tonic-gate */ 5427c478bd9Sstevel@tonic-gate struct seg * 5437c478bd9Sstevel@tonic-gate as_segat(struct as *as, caddr_t addr) 5447c478bd9Sstevel@tonic-gate { 5457c478bd9Sstevel@tonic-gate struct seg *seg = as->a_seglast; 5467c478bd9Sstevel@tonic-gate 547dc32d872SJosef 'Jeff' Sipek ASSERT(AS_LOCK_HELD(as)); 5487c478bd9Sstevel@tonic-gate 5497c478bd9Sstevel@tonic-gate if (seg != NULL && seg->s_base <= addr && 5507c478bd9Sstevel@tonic-gate addr < seg->s_base + seg->s_size) 5517c478bd9Sstevel@tonic-gate return (seg); 5527c478bd9Sstevel@tonic-gate 5537c478bd9Sstevel@tonic-gate seg = avl_find(&as->a_segtree, &addr, NULL); 5547c478bd9Sstevel@tonic-gate return (seg); 5557c478bd9Sstevel@tonic-gate } 5567c478bd9Sstevel@tonic-gate 5577c478bd9Sstevel@tonic-gate /* 5587c478bd9Sstevel@tonic-gate * Serialize all searches for holes in an address space to 5597c478bd9Sstevel@tonic-gate * prevent two or more threads from allocating the same virtual 5607c478bd9Sstevel@tonic-gate * address range. The address space must not be "read/write" 5617c478bd9Sstevel@tonic-gate * locked by the caller since we may block. 5627c478bd9Sstevel@tonic-gate */ 5637c478bd9Sstevel@tonic-gate void 5647c478bd9Sstevel@tonic-gate as_rangelock(struct as *as) 5657c478bd9Sstevel@tonic-gate { 5667c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 5677c478bd9Sstevel@tonic-gate while (AS_ISCLAIMGAP(as)) 5687c478bd9Sstevel@tonic-gate cv_wait(&as->a_cv, &as->a_contents); 5697c478bd9Sstevel@tonic-gate AS_SETCLAIMGAP(as); 5707c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 5717c478bd9Sstevel@tonic-gate } 5727c478bd9Sstevel@tonic-gate 5737c478bd9Sstevel@tonic-gate /* 5747c478bd9Sstevel@tonic-gate * Release hold on a_state & AS_CLAIMGAP and signal any other blocked threads. 5757c478bd9Sstevel@tonic-gate */ 5767c478bd9Sstevel@tonic-gate void 5777c478bd9Sstevel@tonic-gate as_rangeunlock(struct as *as) 5787c478bd9Sstevel@tonic-gate { 5797c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 5807c478bd9Sstevel@tonic-gate AS_CLRCLAIMGAP(as); 5817c478bd9Sstevel@tonic-gate cv_signal(&as->a_cv); 5827c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 5837c478bd9Sstevel@tonic-gate } 5847c478bd9Sstevel@tonic-gate 5857c478bd9Sstevel@tonic-gate /* 5867c478bd9Sstevel@tonic-gate * compar segments (or just an address) by segment address range 5877c478bd9Sstevel@tonic-gate */ 5887c478bd9Sstevel@tonic-gate static int 5897c478bd9Sstevel@tonic-gate as_segcompar(const void *x, const void *y) 5907c478bd9Sstevel@tonic-gate { 5917c478bd9Sstevel@tonic-gate struct seg *a = (struct seg *)x; 5927c478bd9Sstevel@tonic-gate struct seg *b = (struct seg *)y; 5937c478bd9Sstevel@tonic-gate 5947c478bd9Sstevel@tonic-gate if (a->s_base < b->s_base) 5957c478bd9Sstevel@tonic-gate return (-1); 5967c478bd9Sstevel@tonic-gate if (a->s_base >= b->s_base + b->s_size) 5977c478bd9Sstevel@tonic-gate return (1); 5987c478bd9Sstevel@tonic-gate return (0); 5997c478bd9Sstevel@tonic-gate } 6007c478bd9Sstevel@tonic-gate 6017c478bd9Sstevel@tonic-gate 6027c478bd9Sstevel@tonic-gate void 6037c478bd9Sstevel@tonic-gate as_avlinit(struct as *as) 6047c478bd9Sstevel@tonic-gate { 6057c478bd9Sstevel@tonic-gate avl_create(&as->a_segtree, as_segcompar, sizeof (struct seg), 6067c478bd9Sstevel@tonic-gate offsetof(struct seg, s_tree)); 6077c478bd9Sstevel@tonic-gate avl_create(&as->a_wpage, wp_compare, sizeof (struct watched_page), 6087c478bd9Sstevel@tonic-gate offsetof(struct watched_page, wp_link)); 6097c478bd9Sstevel@tonic-gate } 6107c478bd9Sstevel@tonic-gate 6117c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 6127c478bd9Sstevel@tonic-gate static int 6137c478bd9Sstevel@tonic-gate as_constructor(void *buf, void *cdrarg, int kmflags) 6147c478bd9Sstevel@tonic-gate { 6157c478bd9Sstevel@tonic-gate struct as *as = buf; 6167c478bd9Sstevel@tonic-gate 6177c478bd9Sstevel@tonic-gate mutex_init(&as->a_contents, NULL, MUTEX_DEFAULT, NULL); 6187c478bd9Sstevel@tonic-gate cv_init(&as->a_cv, NULL, CV_DEFAULT, NULL); 6197c478bd9Sstevel@tonic-gate rw_init(&as->a_lock, NULL, RW_DEFAULT, NULL); 6207c478bd9Sstevel@tonic-gate as_avlinit(as); 6217c478bd9Sstevel@tonic-gate return (0); 6227c478bd9Sstevel@tonic-gate } 6237c478bd9Sstevel@tonic-gate 6247c478bd9Sstevel@tonic-gate /*ARGSUSED1*/ 6257c478bd9Sstevel@tonic-gate static void 6267c478bd9Sstevel@tonic-gate as_destructor(void *buf, void *cdrarg) 6277c478bd9Sstevel@tonic-gate { 6287c478bd9Sstevel@tonic-gate struct as *as = buf; 6297c478bd9Sstevel@tonic-gate 6307c478bd9Sstevel@tonic-gate avl_destroy(&as->a_segtree); 6317c478bd9Sstevel@tonic-gate mutex_destroy(&as->a_contents); 6327c478bd9Sstevel@tonic-gate cv_destroy(&as->a_cv); 6337c478bd9Sstevel@tonic-gate rw_destroy(&as->a_lock); 6347c478bd9Sstevel@tonic-gate } 6357c478bd9Sstevel@tonic-gate 6367c478bd9Sstevel@tonic-gate void 6377c478bd9Sstevel@tonic-gate as_init(void) 6387c478bd9Sstevel@tonic-gate { 6397c478bd9Sstevel@tonic-gate as_cache = kmem_cache_create("as_cache", sizeof (struct as), 0, 640843e1988Sjohnlev as_constructor, as_destructor, NULL, NULL, NULL, 0); 6417c478bd9Sstevel@tonic-gate } 6427c478bd9Sstevel@tonic-gate 6437c478bd9Sstevel@tonic-gate /* 6447c478bd9Sstevel@tonic-gate * Allocate and initialize an address space data structure. 6457c478bd9Sstevel@tonic-gate * We call hat_alloc to allow any machine dependent 6467c478bd9Sstevel@tonic-gate * information in the hat structure to be initialized. 6477c478bd9Sstevel@tonic-gate */ 6487c478bd9Sstevel@tonic-gate struct as * 6497c478bd9Sstevel@tonic-gate as_alloc(void) 6507c478bd9Sstevel@tonic-gate { 6517c478bd9Sstevel@tonic-gate struct as *as; 6527c478bd9Sstevel@tonic-gate 6537c478bd9Sstevel@tonic-gate as = kmem_cache_alloc(as_cache, KM_SLEEP); 6547c478bd9Sstevel@tonic-gate 6557c478bd9Sstevel@tonic-gate as->a_flags = 0; 6567c478bd9Sstevel@tonic-gate as->a_vbits = 0; 6577c478bd9Sstevel@tonic-gate as->a_hrm = NULL; 6587c478bd9Sstevel@tonic-gate as->a_seglast = NULL; 6597c478bd9Sstevel@tonic-gate as->a_size = 0; 66040688216SSudheer A as->a_resvsize = 0; 6617c478bd9Sstevel@tonic-gate as->a_updatedir = 0; 6627c478bd9Sstevel@tonic-gate gethrestime(&as->a_updatetime); 6637c478bd9Sstevel@tonic-gate as->a_objectdir = NULL; 6647c478bd9Sstevel@tonic-gate as->a_sizedir = 0; 6657c478bd9Sstevel@tonic-gate as->a_userlimit = (caddr_t)USERLIMIT; 6667c478bd9Sstevel@tonic-gate as->a_lastgap = NULL; 6677c478bd9Sstevel@tonic-gate as->a_lastgaphl = NULL; 6687c478bd9Sstevel@tonic-gate as->a_callbacks = NULL; 669*6430daecSBrandon Baker as->a_proc = NULL; 6707c478bd9Sstevel@tonic-gate 671dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 6727c478bd9Sstevel@tonic-gate as->a_hat = hat_alloc(as); /* create hat for default system mmu */ 673dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 6747c478bd9Sstevel@tonic-gate 6757c478bd9Sstevel@tonic-gate return (as); 6767c478bd9Sstevel@tonic-gate } 6777c478bd9Sstevel@tonic-gate 6787c478bd9Sstevel@tonic-gate /* 6797c478bd9Sstevel@tonic-gate * Free an address space data structure. 6807c478bd9Sstevel@tonic-gate * Need to free the hat first and then 6817c478bd9Sstevel@tonic-gate * all the segments on this as and finally 6827c478bd9Sstevel@tonic-gate * the space for the as struct itself. 6837c478bd9Sstevel@tonic-gate */ 6847c478bd9Sstevel@tonic-gate void 6857c478bd9Sstevel@tonic-gate as_free(struct as *as) 6867c478bd9Sstevel@tonic-gate { 6877c478bd9Sstevel@tonic-gate struct hat *hat = as->a_hat; 6887c478bd9Sstevel@tonic-gate struct seg *seg, *next; 6890d5ae8c1SJosef 'Jeff' Sipek boolean_t free_started = B_FALSE; 6907c478bd9Sstevel@tonic-gate 6917c478bd9Sstevel@tonic-gate top: 6927c478bd9Sstevel@tonic-gate /* 6937c478bd9Sstevel@tonic-gate * Invoke ALL callbacks. as_do_callbacks will do one callback 6947c478bd9Sstevel@tonic-gate * per call, and not return (-1) until the callback has completed. 6957c478bd9Sstevel@tonic-gate * When as_do_callbacks returns zero, all callbacks have completed. 6967c478bd9Sstevel@tonic-gate */ 6977c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 698843e1988Sjohnlev while (as->a_callbacks && as_do_callbacks(as, AS_ALL_EVENT, 0, 0)) 699843e1988Sjohnlev ; 7007c478bd9Sstevel@tonic-gate 7017c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 702dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 7037c478bd9Sstevel@tonic-gate 7040d5ae8c1SJosef 'Jeff' Sipek if (!free_started) { 7050d5ae8c1SJosef 'Jeff' Sipek free_started = B_TRUE; 7067c478bd9Sstevel@tonic-gate hat_free_start(hat); 7077c478bd9Sstevel@tonic-gate } 7087c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg != NULL; seg = next) { 7097c478bd9Sstevel@tonic-gate int err; 7107c478bd9Sstevel@tonic-gate 7117c478bd9Sstevel@tonic-gate next = AS_SEGNEXT(as, seg); 712a98e9dbfSaguzovsk retry: 7137c478bd9Sstevel@tonic-gate err = SEGOP_UNMAP(seg, seg->s_base, seg->s_size); 7147c478bd9Sstevel@tonic-gate if (err == EAGAIN) { 7157c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 7167c478bd9Sstevel@tonic-gate if (as->a_callbacks) { 717dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 718a98e9dbfSaguzovsk } else if (!AS_ISNOUNMAPWAIT(as)) { 7197c478bd9Sstevel@tonic-gate /* 7207c478bd9Sstevel@tonic-gate * Memory is currently locked. Wait for a 7217c478bd9Sstevel@tonic-gate * cv_signal that it has been unlocked, then 7227c478bd9Sstevel@tonic-gate * try the operation again. 7237c478bd9Sstevel@tonic-gate */ 7247c478bd9Sstevel@tonic-gate if (AS_ISUNMAPWAIT(as) == 0) 7257c478bd9Sstevel@tonic-gate cv_broadcast(&as->a_cv); 7267c478bd9Sstevel@tonic-gate AS_SETUNMAPWAIT(as); 727dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 7287c478bd9Sstevel@tonic-gate while (AS_ISUNMAPWAIT(as)) 7297c478bd9Sstevel@tonic-gate cv_wait(&as->a_cv, &as->a_contents); 730a98e9dbfSaguzovsk } else { 731a98e9dbfSaguzovsk /* 732a98e9dbfSaguzovsk * We may have raced with 733a98e9dbfSaguzovsk * segvn_reclaim()/segspt_reclaim(). In this 734a98e9dbfSaguzovsk * case clean nounmapwait flag and retry since 735a98e9dbfSaguzovsk * softlockcnt in this segment may be already 736a98e9dbfSaguzovsk * 0. We don't drop as writer lock so our 737a98e9dbfSaguzovsk * number of retries without sleeping should 738a98e9dbfSaguzovsk * be very small. See segvn_reclaim() for 739a98e9dbfSaguzovsk * more comments. 740a98e9dbfSaguzovsk */ 741a98e9dbfSaguzovsk AS_CLRNOUNMAPWAIT(as); 742a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 743a98e9dbfSaguzovsk goto retry; 7447c478bd9Sstevel@tonic-gate } 7457c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 7467c478bd9Sstevel@tonic-gate goto top; 7477c478bd9Sstevel@tonic-gate } else { 7487c478bd9Sstevel@tonic-gate /* 7497c478bd9Sstevel@tonic-gate * We do not expect any other error return at this 7507c478bd9Sstevel@tonic-gate * time. This is similar to an ASSERT in seg_unmap() 7517c478bd9Sstevel@tonic-gate */ 7527c478bd9Sstevel@tonic-gate ASSERT(err == 0); 7537c478bd9Sstevel@tonic-gate } 7547c478bd9Sstevel@tonic-gate } 7557c478bd9Sstevel@tonic-gate hat_free_end(hat); 756dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 7577c478bd9Sstevel@tonic-gate 7587c478bd9Sstevel@tonic-gate /* /proc stuff */ 7597c478bd9Sstevel@tonic-gate ASSERT(avl_numnodes(&as->a_wpage) == 0); 7607c478bd9Sstevel@tonic-gate if (as->a_objectdir) { 7617c478bd9Sstevel@tonic-gate kmem_free(as->a_objectdir, as->a_sizedir * sizeof (vnode_t *)); 7627c478bd9Sstevel@tonic-gate as->a_objectdir = NULL; 7637c478bd9Sstevel@tonic-gate as->a_sizedir = 0; 7647c478bd9Sstevel@tonic-gate } 7657c478bd9Sstevel@tonic-gate 7667c478bd9Sstevel@tonic-gate /* 7677c478bd9Sstevel@tonic-gate * Free the struct as back to kmem. Assert it has no segments. 7687c478bd9Sstevel@tonic-gate */ 7697c478bd9Sstevel@tonic-gate ASSERT(avl_numnodes(&as->a_segtree) == 0); 7707c478bd9Sstevel@tonic-gate kmem_cache_free(as_cache, as); 7717c478bd9Sstevel@tonic-gate } 7727c478bd9Sstevel@tonic-gate 7737c478bd9Sstevel@tonic-gate int 774bb5ca623SVamsi Nagineni as_dup(struct as *as, struct proc *forkedproc) 7757c478bd9Sstevel@tonic-gate { 7767c478bd9Sstevel@tonic-gate struct as *newas; 7777c478bd9Sstevel@tonic-gate struct seg *seg, *newseg; 77840688216SSudheer A size_t purgesize = 0; 7797c478bd9Sstevel@tonic-gate int error; 7807c478bd9Sstevel@tonic-gate 781dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 7827c478bd9Sstevel@tonic-gate as_clearwatch(as); 7837c478bd9Sstevel@tonic-gate newas = as_alloc(); 7847c478bd9Sstevel@tonic-gate newas->a_userlimit = as->a_userlimit; 785bb5ca623SVamsi Nagineni newas->a_proc = forkedproc; 786250f6acdSvk 787dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(newas, RW_WRITER); 7887c478bd9Sstevel@tonic-gate 78905d3dc4bSpaulsan (void) hat_dup(as->a_hat, newas->a_hat, NULL, 0, HAT_DUP_SRD); 7907c478bd9Sstevel@tonic-gate 7917c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) { 7927c478bd9Sstevel@tonic-gate 79340688216SSudheer A if (seg->s_flags & S_PURGE) { 79440688216SSudheer A purgesize += seg->s_size; 7957c478bd9Sstevel@tonic-gate continue; 79640688216SSudheer A } 7977c478bd9Sstevel@tonic-gate 7987c478bd9Sstevel@tonic-gate newseg = seg_alloc(newas, seg->s_base, seg->s_size); 7997c478bd9Sstevel@tonic-gate if (newseg == NULL) { 800dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(newas); 8017c478bd9Sstevel@tonic-gate as_setwatch(as); 802dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 8037c478bd9Sstevel@tonic-gate as_free(newas); 8047c478bd9Sstevel@tonic-gate return (-1); 8057c478bd9Sstevel@tonic-gate } 8067c478bd9Sstevel@tonic-gate if ((error = SEGOP_DUP(seg, newseg)) != 0) { 8077c478bd9Sstevel@tonic-gate /* 8087c478bd9Sstevel@tonic-gate * We call seg_free() on the new seg 8097c478bd9Sstevel@tonic-gate * because the segment is not set up 8107c478bd9Sstevel@tonic-gate * completely; i.e. it has no ops. 8117c478bd9Sstevel@tonic-gate */ 8127c478bd9Sstevel@tonic-gate as_setwatch(as); 813dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 8147c478bd9Sstevel@tonic-gate seg_free(newseg); 815dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(newas); 8167c478bd9Sstevel@tonic-gate as_free(newas); 8177c478bd9Sstevel@tonic-gate return (error); 8187c478bd9Sstevel@tonic-gate } 8197c478bd9Sstevel@tonic-gate newas->a_size += seg->s_size; 8207c478bd9Sstevel@tonic-gate } 82140688216SSudheer A newas->a_resvsize = as->a_resvsize - purgesize; 8227c478bd9Sstevel@tonic-gate 8237c478bd9Sstevel@tonic-gate error = hat_dup(as->a_hat, newas->a_hat, NULL, 0, HAT_DUP_ALL); 8247c478bd9Sstevel@tonic-gate 825dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(newas); 8267c478bd9Sstevel@tonic-gate 8277c478bd9Sstevel@tonic-gate as_setwatch(as); 828dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 8297c478bd9Sstevel@tonic-gate if (error != 0) { 8307c478bd9Sstevel@tonic-gate as_free(newas); 8317c478bd9Sstevel@tonic-gate return (error); 8327c478bd9Sstevel@tonic-gate } 833bb5ca623SVamsi Nagineni forkedproc->p_as = newas; 8347c478bd9Sstevel@tonic-gate return (0); 8357c478bd9Sstevel@tonic-gate } 8367c478bd9Sstevel@tonic-gate 8377c478bd9Sstevel@tonic-gate /* 8387c478bd9Sstevel@tonic-gate * Handle a ``fault'' at addr for size bytes. 8397c478bd9Sstevel@tonic-gate */ 8407c478bd9Sstevel@tonic-gate faultcode_t 8417c478bd9Sstevel@tonic-gate as_fault(struct hat *hat, struct as *as, caddr_t addr, size_t size, 842*6430daecSBrandon Baker enum fault_type type, enum seg_rw rw) 8437c478bd9Sstevel@tonic-gate { 8447c478bd9Sstevel@tonic-gate struct seg *seg; 8457c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 8467c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 8477c478bd9Sstevel@tonic-gate size_t ssize; 8487c478bd9Sstevel@tonic-gate faultcode_t res = 0; 8497c478bd9Sstevel@tonic-gate caddr_t addrsav; 8507c478bd9Sstevel@tonic-gate struct seg *segsav; 8517c478bd9Sstevel@tonic-gate int as_lock_held; 8527c478bd9Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 8537c478bd9Sstevel@tonic-gate 8547c478bd9Sstevel@tonic-gate 8557c478bd9Sstevel@tonic-gate 8567c478bd9Sstevel@tonic-gate retry: 8570d5ae8c1SJosef 'Jeff' Sipek /* 8580d5ae8c1SJosef 'Jeff' Sipek * Indicate that the lwp is not to be stopped while waiting for a 8590d5ae8c1SJosef 'Jeff' Sipek * pagefault. This is to avoid deadlock while debugging a process 8600d5ae8c1SJosef 'Jeff' Sipek * via /proc over NFS (in particular). 8610d5ae8c1SJosef 'Jeff' Sipek */ 8620d5ae8c1SJosef 'Jeff' Sipek if (lwp != NULL) 8630d5ae8c1SJosef 'Jeff' Sipek lwp->lwp_nostop++; 8647c478bd9Sstevel@tonic-gate 8650d5ae8c1SJosef 'Jeff' Sipek /* 8660d5ae8c1SJosef 'Jeff' Sipek * same length must be used when we softlock and softunlock. We 8670d5ae8c1SJosef 'Jeff' Sipek * don't support softunlocking lengths less than the original length 8680d5ae8c1SJosef 'Jeff' Sipek * when there is largepage support. See seg_dev.c for more 8690d5ae8c1SJosef 'Jeff' Sipek * comments. 8700d5ae8c1SJosef 'Jeff' Sipek */ 8710d5ae8c1SJosef 'Jeff' Sipek switch (type) { 8727c478bd9Sstevel@tonic-gate 8730d5ae8c1SJosef 'Jeff' Sipek case F_SOFTLOCK: 8740d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_ADD_K(vm, softlock, 1); 8750d5ae8c1SJosef 'Jeff' Sipek break; 8767c478bd9Sstevel@tonic-gate 8770d5ae8c1SJosef 'Jeff' Sipek case F_SOFTUNLOCK: 8780d5ae8c1SJosef 'Jeff' Sipek break; 8797c478bd9Sstevel@tonic-gate 8800d5ae8c1SJosef 'Jeff' Sipek case F_PROT: 8810d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_ADD_K(vm, prot_fault, 1); 8820d5ae8c1SJosef 'Jeff' Sipek break; 8837c478bd9Sstevel@tonic-gate 8840d5ae8c1SJosef 'Jeff' Sipek case F_INVAL: 8850d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_ENTER_K(); 8860d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_ADDQ(CPU, vm, as_fault, 1); 8870d5ae8c1SJosef 'Jeff' Sipek if (as == &kas) 8880d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_ADDQ(CPU, vm, kernel_asflt, 1); 8890d5ae8c1SJosef 'Jeff' Sipek CPU_STATS_EXIT_K(); 8900d5ae8c1SJosef 'Jeff' Sipek break; 8917c478bd9Sstevel@tonic-gate } 8927c478bd9Sstevel@tonic-gate 8937c478bd9Sstevel@tonic-gate /* Kernel probe */ 8947c478bd9Sstevel@tonic-gate TNF_PROBE_3(address_fault, "vm pagefault", /* CSTYLED */, 895843e1988Sjohnlev tnf_opaque, address, addr, 896843e1988Sjohnlev tnf_fault_type, fault_type, type, 897843e1988Sjohnlev tnf_seg_access, access, rw); 8987c478bd9Sstevel@tonic-gate 8997c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 9007c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 901843e1988Sjohnlev (size_t)raddr; 9027c478bd9Sstevel@tonic-gate 9037c478bd9Sstevel@tonic-gate /* 9047c478bd9Sstevel@tonic-gate * XXX -- Don't grab the as lock for segkmap. We should grab it for 9057c478bd9Sstevel@tonic-gate * correctness, but then we could be stuck holding this lock for 9067c478bd9Sstevel@tonic-gate * a LONG time if the fault needs to be resolved on a slow 9077c478bd9Sstevel@tonic-gate * filesystem, and then no-one will be able to exec new commands, 9087c478bd9Sstevel@tonic-gate * as exec'ing requires the write lock on the as. 9097c478bd9Sstevel@tonic-gate */ 9107c478bd9Sstevel@tonic-gate if (as == &kas && segkmap && segkmap->s_base <= raddr && 9117c478bd9Sstevel@tonic-gate raddr + size < segkmap->s_base + segkmap->s_size) { 9127c478bd9Sstevel@tonic-gate seg = segkmap; 9137c478bd9Sstevel@tonic-gate as_lock_held = 0; 9147c478bd9Sstevel@tonic-gate } else { 915dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 9167c478bd9Sstevel@tonic-gate 9177c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 9187c478bd9Sstevel@tonic-gate if (seg == NULL) { 919dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 9200d5ae8c1SJosef 'Jeff' Sipek if (lwp != NULL) 9217c478bd9Sstevel@tonic-gate lwp->lwp_nostop--; 9227c478bd9Sstevel@tonic-gate return (FC_NOMAP); 9237c478bd9Sstevel@tonic-gate } 9247c478bd9Sstevel@tonic-gate 9257c478bd9Sstevel@tonic-gate as_lock_held = 1; 9267c478bd9Sstevel@tonic-gate } 9277c478bd9Sstevel@tonic-gate 9287c478bd9Sstevel@tonic-gate addrsav = raddr; 9297c478bd9Sstevel@tonic-gate segsav = seg; 9307c478bd9Sstevel@tonic-gate 9317c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= ssize, raddr += ssize) { 9327c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 9337c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 9347c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 9357c478bd9Sstevel@tonic-gate res = FC_NOMAP; 9367c478bd9Sstevel@tonic-gate break; 9377c478bd9Sstevel@tonic-gate } 9387c478bd9Sstevel@tonic-gate } 9397c478bd9Sstevel@tonic-gate if (raddr + rsize > seg->s_base + seg->s_size) 9407c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 9417c478bd9Sstevel@tonic-gate else 9427c478bd9Sstevel@tonic-gate ssize = rsize; 9437c478bd9Sstevel@tonic-gate 9440d5ae8c1SJosef 'Jeff' Sipek res = SEGOP_FAULT(hat, seg, raddr, ssize, type, rw); 9450d5ae8c1SJosef 'Jeff' Sipek if (res != 0) 9467c478bd9Sstevel@tonic-gate break; 9477c478bd9Sstevel@tonic-gate } 9487c478bd9Sstevel@tonic-gate 9497c478bd9Sstevel@tonic-gate /* 9507c478bd9Sstevel@tonic-gate * If we were SOFTLOCKing and encountered a failure, 9517c478bd9Sstevel@tonic-gate * we must SOFTUNLOCK the range we already did. (Maybe we 9527c478bd9Sstevel@tonic-gate * should just panic if we are SOFTLOCKing or even SOFTUNLOCKing 9537c478bd9Sstevel@tonic-gate * right here...) 9547c478bd9Sstevel@tonic-gate */ 9557c478bd9Sstevel@tonic-gate if (res != 0 && type == F_SOFTLOCK) { 9567c478bd9Sstevel@tonic-gate for (seg = segsav; addrsav < raddr; addrsav += ssize) { 9577c478bd9Sstevel@tonic-gate if (addrsav >= seg->s_base + seg->s_size) 9587c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 9597c478bd9Sstevel@tonic-gate ASSERT(seg != NULL); 9607c478bd9Sstevel@tonic-gate /* 9617c478bd9Sstevel@tonic-gate * Now call the fault routine again to perform the 9627c478bd9Sstevel@tonic-gate * unlock using S_OTHER instead of the rw variable 9637c478bd9Sstevel@tonic-gate * since we never got a chance to touch the pages. 9647c478bd9Sstevel@tonic-gate */ 9657c478bd9Sstevel@tonic-gate if (raddr > seg->s_base + seg->s_size) 9667c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - addrsav; 9677c478bd9Sstevel@tonic-gate else 9687c478bd9Sstevel@tonic-gate ssize = raddr - addrsav; 9697c478bd9Sstevel@tonic-gate (void) SEGOP_FAULT(hat, seg, addrsav, ssize, 9707c478bd9Sstevel@tonic-gate F_SOFTUNLOCK, S_OTHER); 9717c478bd9Sstevel@tonic-gate } 9727c478bd9Sstevel@tonic-gate } 9737c478bd9Sstevel@tonic-gate if (as_lock_held) 974dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 9750d5ae8c1SJosef 'Jeff' Sipek if (lwp != NULL) 9767c478bd9Sstevel@tonic-gate lwp->lwp_nostop--; 9778548bf79Snr 9787c478bd9Sstevel@tonic-gate /* 9797c478bd9Sstevel@tonic-gate * If the lower levels returned EDEADLK for a fault, 9807c478bd9Sstevel@tonic-gate * It means that we should retry the fault. Let's wait 9817c478bd9Sstevel@tonic-gate * a bit also to let the deadlock causing condition clear. 9827c478bd9Sstevel@tonic-gate * This is part of a gross hack to work around a design flaw 9837c478bd9Sstevel@tonic-gate * in the ufs/sds logging code and should go away when the 9847c478bd9Sstevel@tonic-gate * logging code is re-designed to fix the problem. See bug 9857c478bd9Sstevel@tonic-gate * 4125102 for details of the problem. 9867c478bd9Sstevel@tonic-gate */ 9877c478bd9Sstevel@tonic-gate if (FC_ERRNO(res) == EDEADLK) { 9887c478bd9Sstevel@tonic-gate delay(deadlk_wait); 9897c478bd9Sstevel@tonic-gate res = 0; 9907c478bd9Sstevel@tonic-gate goto retry; 9917c478bd9Sstevel@tonic-gate } 9927c478bd9Sstevel@tonic-gate return (res); 9937c478bd9Sstevel@tonic-gate } 9947c478bd9Sstevel@tonic-gate 9957c478bd9Sstevel@tonic-gate 9967c478bd9Sstevel@tonic-gate 9977c478bd9Sstevel@tonic-gate /* 9987c478bd9Sstevel@tonic-gate * Asynchronous ``fault'' at addr for size bytes. 9997c478bd9Sstevel@tonic-gate */ 10007c478bd9Sstevel@tonic-gate faultcode_t 10017c478bd9Sstevel@tonic-gate as_faulta(struct as *as, caddr_t addr, size_t size) 10027c478bd9Sstevel@tonic-gate { 10037c478bd9Sstevel@tonic-gate struct seg *seg; 10047c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 10057c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 10067c478bd9Sstevel@tonic-gate faultcode_t res = 0; 10077c478bd9Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 10087c478bd9Sstevel@tonic-gate 10097c478bd9Sstevel@tonic-gate retry: 10107c478bd9Sstevel@tonic-gate /* 10117c478bd9Sstevel@tonic-gate * Indicate that the lwp is not to be stopped while waiting 10127c478bd9Sstevel@tonic-gate * for a pagefault. This is to avoid deadlock while debugging 10137c478bd9Sstevel@tonic-gate * a process via /proc over NFS (in particular). 10147c478bd9Sstevel@tonic-gate */ 10158548bf79Snr if (lwp != NULL) 10167c478bd9Sstevel@tonic-gate lwp->lwp_nostop++; 10177c478bd9Sstevel@tonic-gate 10187c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 10197c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 1020843e1988Sjohnlev (size_t)raddr; 10217c478bd9Sstevel@tonic-gate 1022dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 10237c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 10247c478bd9Sstevel@tonic-gate if (seg == NULL) { 1025dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 10268548bf79Snr if (lwp != NULL) 10277c478bd9Sstevel@tonic-gate lwp->lwp_nostop--; 10287c478bd9Sstevel@tonic-gate return (FC_NOMAP); 10297c478bd9Sstevel@tonic-gate } 10307c478bd9Sstevel@tonic-gate 10317c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= PAGESIZE, raddr += PAGESIZE) { 10327c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 10337c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 10347c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 10357c478bd9Sstevel@tonic-gate res = FC_NOMAP; 10367c478bd9Sstevel@tonic-gate break; 10377c478bd9Sstevel@tonic-gate } 10387c478bd9Sstevel@tonic-gate } 10397c478bd9Sstevel@tonic-gate res = SEGOP_FAULTA(seg, raddr); 10407c478bd9Sstevel@tonic-gate if (res != 0) 10417c478bd9Sstevel@tonic-gate break; 10427c478bd9Sstevel@tonic-gate } 1043dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 10448548bf79Snr if (lwp != NULL) 10457c478bd9Sstevel@tonic-gate lwp->lwp_nostop--; 10467c478bd9Sstevel@tonic-gate /* 10477c478bd9Sstevel@tonic-gate * If the lower levels returned EDEADLK for a fault, 10487c478bd9Sstevel@tonic-gate * It means that we should retry the fault. Let's wait 10497c478bd9Sstevel@tonic-gate * a bit also to let the deadlock causing condition clear. 10507c478bd9Sstevel@tonic-gate * This is part of a gross hack to work around a design flaw 10517c478bd9Sstevel@tonic-gate * in the ufs/sds logging code and should go away when the 10527c478bd9Sstevel@tonic-gate * logging code is re-designed to fix the problem. See bug 10537c478bd9Sstevel@tonic-gate * 4125102 for details of the problem. 10547c478bd9Sstevel@tonic-gate */ 10557c478bd9Sstevel@tonic-gate if (FC_ERRNO(res) == EDEADLK) { 10567c478bd9Sstevel@tonic-gate delay(deadlk_wait); 10577c478bd9Sstevel@tonic-gate res = 0; 10587c478bd9Sstevel@tonic-gate goto retry; 10597c478bd9Sstevel@tonic-gate } 10607c478bd9Sstevel@tonic-gate return (res); 10617c478bd9Sstevel@tonic-gate } 10627c478bd9Sstevel@tonic-gate 10637c478bd9Sstevel@tonic-gate /* 10647c478bd9Sstevel@tonic-gate * Set the virtual mapping for the interval from [addr : addr + size) 10657c478bd9Sstevel@tonic-gate * in address space `as' to have the specified protection. 10667c478bd9Sstevel@tonic-gate * It is ok for the range to cross over several segments, 10677c478bd9Sstevel@tonic-gate * as long as they are contiguous. 10687c478bd9Sstevel@tonic-gate */ 10697c478bd9Sstevel@tonic-gate int 10707c478bd9Sstevel@tonic-gate as_setprot(struct as *as, caddr_t addr, size_t size, uint_t prot) 10717c478bd9Sstevel@tonic-gate { 10727c478bd9Sstevel@tonic-gate struct seg *seg; 10737c478bd9Sstevel@tonic-gate struct as_callback *cb; 10747c478bd9Sstevel@tonic-gate size_t ssize; 10757c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 10767c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 10777c478bd9Sstevel@tonic-gate int error = 0, writer = 0; 10787c478bd9Sstevel@tonic-gate caddr_t saveraddr; 10797c478bd9Sstevel@tonic-gate size_t saversize; 10807c478bd9Sstevel@tonic-gate 10817c478bd9Sstevel@tonic-gate setprot_top: 10827c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 10837c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 1084843e1988Sjohnlev (size_t)raddr; 10857c478bd9Sstevel@tonic-gate 10867c478bd9Sstevel@tonic-gate if (raddr + rsize < raddr) /* check for wraparound */ 10877c478bd9Sstevel@tonic-gate return (ENOMEM); 10887c478bd9Sstevel@tonic-gate 10897c478bd9Sstevel@tonic-gate saveraddr = raddr; 10907c478bd9Sstevel@tonic-gate saversize = rsize; 10917c478bd9Sstevel@tonic-gate 10927c478bd9Sstevel@tonic-gate /* 10937c478bd9Sstevel@tonic-gate * Normally we only lock the as as a reader. But 10947c478bd9Sstevel@tonic-gate * if due to setprot the segment driver needs to split 1095da6c28aaSamw * a segment it will return IE_RETRY. Therefore we re-acquire 10967c478bd9Sstevel@tonic-gate * the as lock as a writer so the segment driver can change 10977c478bd9Sstevel@tonic-gate * the seg list. Also the segment driver will return IE_RETRY 10987c478bd9Sstevel@tonic-gate * after it has changed the segment list so we therefore keep 10997c478bd9Sstevel@tonic-gate * locking as a writer. Since these opeartions should be rare 11007c478bd9Sstevel@tonic-gate * want to only lock as a writer when necessary. 11017c478bd9Sstevel@tonic-gate */ 11027c478bd9Sstevel@tonic-gate if (writer || avl_numnodes(&as->a_wpage) != 0) { 1103dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 11047c478bd9Sstevel@tonic-gate } else { 1105dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 11067c478bd9Sstevel@tonic-gate } 11077c478bd9Sstevel@tonic-gate 11087c478bd9Sstevel@tonic-gate as_clearwatchprot(as, raddr, rsize); 11097c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 11107c478bd9Sstevel@tonic-gate if (seg == NULL) { 11117c478bd9Sstevel@tonic-gate as_setwatch(as); 1112dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 11137c478bd9Sstevel@tonic-gate return (ENOMEM); 11147c478bd9Sstevel@tonic-gate } 11157c478bd9Sstevel@tonic-gate 11167c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= ssize, raddr += ssize) { 11177c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 11187c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 11197c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 11207c478bd9Sstevel@tonic-gate error = ENOMEM; 11217c478bd9Sstevel@tonic-gate break; 11227c478bd9Sstevel@tonic-gate } 11237c478bd9Sstevel@tonic-gate } 11247c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) 11257c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 11267c478bd9Sstevel@tonic-gate else 11277c478bd9Sstevel@tonic-gate ssize = rsize; 1128a98e9dbfSaguzovsk retry: 11297c478bd9Sstevel@tonic-gate error = SEGOP_SETPROT(seg, raddr, ssize, prot); 11307c478bd9Sstevel@tonic-gate 11317c478bd9Sstevel@tonic-gate if (error == IE_NOMEM) { 11327c478bd9Sstevel@tonic-gate error = EAGAIN; 11337c478bd9Sstevel@tonic-gate break; 11347c478bd9Sstevel@tonic-gate } 11357c478bd9Sstevel@tonic-gate 11367c478bd9Sstevel@tonic-gate if (error == IE_RETRY) { 1137dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 11387c478bd9Sstevel@tonic-gate writer = 1; 11397c478bd9Sstevel@tonic-gate goto setprot_top; 11407c478bd9Sstevel@tonic-gate } 11417c478bd9Sstevel@tonic-gate 11427c478bd9Sstevel@tonic-gate if (error == EAGAIN) { 11437c478bd9Sstevel@tonic-gate /* 11447c478bd9Sstevel@tonic-gate * Make sure we have a_lock as writer. 11457c478bd9Sstevel@tonic-gate */ 11467c478bd9Sstevel@tonic-gate if (writer == 0) { 1147dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 11487c478bd9Sstevel@tonic-gate writer = 1; 11497c478bd9Sstevel@tonic-gate goto setprot_top; 11507c478bd9Sstevel@tonic-gate } 11517c478bd9Sstevel@tonic-gate 11527c478bd9Sstevel@tonic-gate /* 11537c478bd9Sstevel@tonic-gate * Memory is currently locked. It must be unlocked 11547c478bd9Sstevel@tonic-gate * before this operation can succeed through a retry. 11557c478bd9Sstevel@tonic-gate * The possible reasons for locked memory and 11567c478bd9Sstevel@tonic-gate * corresponding strategies for unlocking are: 11577c478bd9Sstevel@tonic-gate * (1) Normal I/O 11587c478bd9Sstevel@tonic-gate * wait for a signal that the I/O operation 11597c478bd9Sstevel@tonic-gate * has completed and the memory is unlocked. 11607c478bd9Sstevel@tonic-gate * (2) Asynchronous I/O 11617c478bd9Sstevel@tonic-gate * The aio subsystem does not unlock pages when 11627c478bd9Sstevel@tonic-gate * the I/O is completed. Those pages are unlocked 11637c478bd9Sstevel@tonic-gate * when the application calls aiowait/aioerror. 11647c478bd9Sstevel@tonic-gate * So, to prevent blocking forever, cv_broadcast() 11657c478bd9Sstevel@tonic-gate * is done to wake up aio_cleanup_thread. 11667c478bd9Sstevel@tonic-gate * Subsequently, segvn_reclaim will be called, and 11677c478bd9Sstevel@tonic-gate * that will do AS_CLRUNMAPWAIT() and wake us up. 11687c478bd9Sstevel@tonic-gate * (3) Long term page locking: 11697c478bd9Sstevel@tonic-gate * Drivers intending to have pages locked for a 11707c478bd9Sstevel@tonic-gate * period considerably longer than for normal I/O 11717c478bd9Sstevel@tonic-gate * (essentially forever) may have registered for a 11727c478bd9Sstevel@tonic-gate * callback so they may unlock these pages on 11737c478bd9Sstevel@tonic-gate * request. This is needed to allow this operation 11747c478bd9Sstevel@tonic-gate * to succeed. Each entry on the callback list is 11757c478bd9Sstevel@tonic-gate * examined. If the event or address range pertains 11767c478bd9Sstevel@tonic-gate * the callback is invoked (unless it already is in 11777c478bd9Sstevel@tonic-gate * progress). The a_contents lock must be dropped 11787c478bd9Sstevel@tonic-gate * before the callback, so only one callback can 11797c478bd9Sstevel@tonic-gate * be done at a time. Go to the top and do more 11807c478bd9Sstevel@tonic-gate * until zero is returned. If zero is returned, 11817c478bd9Sstevel@tonic-gate * either there were no callbacks for this event 11827c478bd9Sstevel@tonic-gate * or they were already in progress. 11837c478bd9Sstevel@tonic-gate */ 11847c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 11857c478bd9Sstevel@tonic-gate if (as->a_callbacks && 1186843e1988Sjohnlev (cb = as_find_callback(as, AS_SETPROT_EVENT, 1187843e1988Sjohnlev seg->s_base, seg->s_size))) { 1188dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 11897c478bd9Sstevel@tonic-gate as_execute_callback(as, cb, AS_SETPROT_EVENT); 1190a98e9dbfSaguzovsk } else if (!AS_ISNOUNMAPWAIT(as)) { 11917c478bd9Sstevel@tonic-gate if (AS_ISUNMAPWAIT(as) == 0) 11927c478bd9Sstevel@tonic-gate cv_broadcast(&as->a_cv); 11937c478bd9Sstevel@tonic-gate AS_SETUNMAPWAIT(as); 1194dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 11957c478bd9Sstevel@tonic-gate while (AS_ISUNMAPWAIT(as)) 11967c478bd9Sstevel@tonic-gate cv_wait(&as->a_cv, &as->a_contents); 1197a98e9dbfSaguzovsk } else { 1198a98e9dbfSaguzovsk /* 1199a98e9dbfSaguzovsk * We may have raced with 1200a98e9dbfSaguzovsk * segvn_reclaim()/segspt_reclaim(). In this 1201a98e9dbfSaguzovsk * case clean nounmapwait flag and retry since 1202a98e9dbfSaguzovsk * softlockcnt in this segment may be already 1203a98e9dbfSaguzovsk * 0. We don't drop as writer lock so our 1204a98e9dbfSaguzovsk * number of retries without sleeping should 1205a98e9dbfSaguzovsk * be very small. See segvn_reclaim() for 1206a98e9dbfSaguzovsk * more comments. 1207a98e9dbfSaguzovsk */ 1208a98e9dbfSaguzovsk AS_CLRNOUNMAPWAIT(as); 1209a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 1210a98e9dbfSaguzovsk goto retry; 12117c478bd9Sstevel@tonic-gate } 12127c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 12137c478bd9Sstevel@tonic-gate goto setprot_top; 12147c478bd9Sstevel@tonic-gate } else if (error != 0) 12157c478bd9Sstevel@tonic-gate break; 12167c478bd9Sstevel@tonic-gate } 12177c478bd9Sstevel@tonic-gate if (error != 0) { 12187c478bd9Sstevel@tonic-gate as_setwatch(as); 12197c478bd9Sstevel@tonic-gate } else { 12207c478bd9Sstevel@tonic-gate as_setwatchprot(as, saveraddr, saversize, prot); 12217c478bd9Sstevel@tonic-gate } 1222dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 12237c478bd9Sstevel@tonic-gate return (error); 12247c478bd9Sstevel@tonic-gate } 12257c478bd9Sstevel@tonic-gate 12267c478bd9Sstevel@tonic-gate /* 12277c478bd9Sstevel@tonic-gate * Check to make sure that the interval [addr, addr + size) 12287c478bd9Sstevel@tonic-gate * in address space `as' has at least the specified protection. 12297c478bd9Sstevel@tonic-gate * It is ok for the range to cross over several segments, as long 12307c478bd9Sstevel@tonic-gate * as they are contiguous. 12317c478bd9Sstevel@tonic-gate */ 12327c478bd9Sstevel@tonic-gate int 12337c478bd9Sstevel@tonic-gate as_checkprot(struct as *as, caddr_t addr, size_t size, uint_t prot) 12347c478bd9Sstevel@tonic-gate { 12357c478bd9Sstevel@tonic-gate struct seg *seg; 12367c478bd9Sstevel@tonic-gate size_t ssize; 12377c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 12387c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 12397c478bd9Sstevel@tonic-gate int error = 0; 12407c478bd9Sstevel@tonic-gate 12417c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 12427c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 1243843e1988Sjohnlev (size_t)raddr; 12447c478bd9Sstevel@tonic-gate 12457c478bd9Sstevel@tonic-gate if (raddr + rsize < raddr) /* check for wraparound */ 12467c478bd9Sstevel@tonic-gate return (ENOMEM); 12477c478bd9Sstevel@tonic-gate 12487c478bd9Sstevel@tonic-gate /* 12497c478bd9Sstevel@tonic-gate * This is ugly as sin... 12507c478bd9Sstevel@tonic-gate * Normally, we only acquire the address space readers lock. 12517c478bd9Sstevel@tonic-gate * However, if the address space has watchpoints present, 12527c478bd9Sstevel@tonic-gate * we must acquire the writer lock on the address space for 12537c478bd9Sstevel@tonic-gate * the benefit of as_clearwatchprot() and as_setwatchprot(). 12547c478bd9Sstevel@tonic-gate */ 12557c478bd9Sstevel@tonic-gate if (avl_numnodes(&as->a_wpage) != 0) 1256dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 12577c478bd9Sstevel@tonic-gate else 1258dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 12597c478bd9Sstevel@tonic-gate as_clearwatchprot(as, raddr, rsize); 12607c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 12617c478bd9Sstevel@tonic-gate if (seg == NULL) { 12627c478bd9Sstevel@tonic-gate as_setwatch(as); 1263dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 12647c478bd9Sstevel@tonic-gate return (ENOMEM); 12657c478bd9Sstevel@tonic-gate } 12667c478bd9Sstevel@tonic-gate 12677c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= ssize, raddr += ssize) { 12687c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 12697c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 12707c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 12717c478bd9Sstevel@tonic-gate error = ENOMEM; 12727c478bd9Sstevel@tonic-gate break; 12737c478bd9Sstevel@tonic-gate } 12747c478bd9Sstevel@tonic-gate } 12757c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) 12767c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 12777c478bd9Sstevel@tonic-gate else 12787c478bd9Sstevel@tonic-gate ssize = rsize; 12797c478bd9Sstevel@tonic-gate 12807c478bd9Sstevel@tonic-gate error = SEGOP_CHECKPROT(seg, raddr, ssize, prot); 12817c478bd9Sstevel@tonic-gate if (error != 0) 12827c478bd9Sstevel@tonic-gate break; 12837c478bd9Sstevel@tonic-gate } 12847c478bd9Sstevel@tonic-gate as_setwatch(as); 1285dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 12867c478bd9Sstevel@tonic-gate return (error); 12877c478bd9Sstevel@tonic-gate } 12887c478bd9Sstevel@tonic-gate 12897c478bd9Sstevel@tonic-gate int 12907c478bd9Sstevel@tonic-gate as_unmap(struct as *as, caddr_t addr, size_t size) 12917c478bd9Sstevel@tonic-gate { 12927c478bd9Sstevel@tonic-gate struct seg *seg, *seg_next; 12937c478bd9Sstevel@tonic-gate struct as_callback *cb; 12947c478bd9Sstevel@tonic-gate caddr_t raddr, eaddr; 129540688216SSudheer A size_t ssize, rsize = 0; 12967c478bd9Sstevel@tonic-gate int err; 12977c478bd9Sstevel@tonic-gate 12987c478bd9Sstevel@tonic-gate top: 12997c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 13007c478bd9Sstevel@tonic-gate eaddr = (caddr_t)(((uintptr_t)(addr + size) + PAGEOFFSET) & 13017c478bd9Sstevel@tonic-gate (uintptr_t)PAGEMASK); 13027c478bd9Sstevel@tonic-gate 1303dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 13047c478bd9Sstevel@tonic-gate 13057c478bd9Sstevel@tonic-gate as->a_updatedir = 1; /* inform /proc */ 13067c478bd9Sstevel@tonic-gate gethrestime(&as->a_updatetime); 13077c478bd9Sstevel@tonic-gate 13087c478bd9Sstevel@tonic-gate /* 13097c478bd9Sstevel@tonic-gate * Use as_findseg to find the first segment in the range, then 13107c478bd9Sstevel@tonic-gate * step through the segments in order, following s_next. 13117c478bd9Sstevel@tonic-gate */ 13127c478bd9Sstevel@tonic-gate as_clearwatchprot(as, raddr, eaddr - raddr); 13137c478bd9Sstevel@tonic-gate 13147c478bd9Sstevel@tonic-gate for (seg = as_findseg(as, raddr, 0); seg != NULL; seg = seg_next) { 13157c478bd9Sstevel@tonic-gate if (eaddr <= seg->s_base) 13167c478bd9Sstevel@tonic-gate break; /* eaddr was in a gap; all done */ 13177c478bd9Sstevel@tonic-gate 13187c478bd9Sstevel@tonic-gate /* this is implied by the test above */ 13197c478bd9Sstevel@tonic-gate ASSERT(raddr < eaddr); 13207c478bd9Sstevel@tonic-gate 13217c478bd9Sstevel@tonic-gate if (raddr < seg->s_base) 13227c478bd9Sstevel@tonic-gate raddr = seg->s_base; /* raddr was in a gap */ 13237c478bd9Sstevel@tonic-gate 13247c478bd9Sstevel@tonic-gate if (eaddr > (seg->s_base + seg->s_size)) 13257c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 13267c478bd9Sstevel@tonic-gate else 13277c478bd9Sstevel@tonic-gate ssize = eaddr - raddr; 13287c478bd9Sstevel@tonic-gate 13297c478bd9Sstevel@tonic-gate /* 13307c478bd9Sstevel@tonic-gate * Save next segment pointer since seg can be 13317c478bd9Sstevel@tonic-gate * destroyed during the segment unmap operation. 13327c478bd9Sstevel@tonic-gate */ 13337c478bd9Sstevel@tonic-gate seg_next = AS_SEGNEXT(as, seg); 13347c478bd9Sstevel@tonic-gate 133540688216SSudheer A /* 133640688216SSudheer A * We didn't count /dev/null mappings, so ignore them here. 133740688216SSudheer A * We'll handle MAP_NORESERVE cases in segvn_unmap(). (Again, 133840688216SSudheer A * we have to do this check here while we have seg.) 133940688216SSudheer A */ 134017965fd8SKrishnendu Sadhukhan - Sun Microsystems rsize = 0; 134140688216SSudheer A if (!SEG_IS_DEVNULL_MAPPING(seg) && 134240688216SSudheer A !SEG_IS_PARTIAL_RESV(seg)) 134340688216SSudheer A rsize = ssize; 134440688216SSudheer A 1345a98e9dbfSaguzovsk retry: 13467c478bd9Sstevel@tonic-gate err = SEGOP_UNMAP(seg, raddr, ssize); 13477c478bd9Sstevel@tonic-gate if (err == EAGAIN) { 13487c478bd9Sstevel@tonic-gate /* 13497c478bd9Sstevel@tonic-gate * Memory is currently locked. It must be unlocked 13507c478bd9Sstevel@tonic-gate * before this operation can succeed through a retry. 13517c478bd9Sstevel@tonic-gate * The possible reasons for locked memory and 13527c478bd9Sstevel@tonic-gate * corresponding strategies for unlocking are: 13537c478bd9Sstevel@tonic-gate * (1) Normal I/O 13547c478bd9Sstevel@tonic-gate * wait for a signal that the I/O operation 13557c478bd9Sstevel@tonic-gate * has completed and the memory is unlocked. 13567c478bd9Sstevel@tonic-gate * (2) Asynchronous I/O 13577c478bd9Sstevel@tonic-gate * The aio subsystem does not unlock pages when 13587c478bd9Sstevel@tonic-gate * the I/O is completed. Those pages are unlocked 13597c478bd9Sstevel@tonic-gate * when the application calls aiowait/aioerror. 13607c478bd9Sstevel@tonic-gate * So, to prevent blocking forever, cv_broadcast() 13617c478bd9Sstevel@tonic-gate * is done to wake up aio_cleanup_thread. 13627c478bd9Sstevel@tonic-gate * Subsequently, segvn_reclaim will be called, and 13637c478bd9Sstevel@tonic-gate * that will do AS_CLRUNMAPWAIT() and wake us up. 13647c478bd9Sstevel@tonic-gate * (3) Long term page locking: 13657c478bd9Sstevel@tonic-gate * Drivers intending to have pages locked for a 13667c478bd9Sstevel@tonic-gate * period considerably longer than for normal I/O 13677c478bd9Sstevel@tonic-gate * (essentially forever) may have registered for a 13687c478bd9Sstevel@tonic-gate * callback so they may unlock these pages on 13697c478bd9Sstevel@tonic-gate * request. This is needed to allow this operation 13707c478bd9Sstevel@tonic-gate * to succeed. Each entry on the callback list is 13717c478bd9Sstevel@tonic-gate * examined. If the event or address range pertains 13727c478bd9Sstevel@tonic-gate * the callback is invoked (unless it already is in 13737c478bd9Sstevel@tonic-gate * progress). The a_contents lock must be dropped 13747c478bd9Sstevel@tonic-gate * before the callback, so only one callback can 13757c478bd9Sstevel@tonic-gate * be done at a time. Go to the top and do more 13767c478bd9Sstevel@tonic-gate * until zero is returned. If zero is returned, 13777c478bd9Sstevel@tonic-gate * either there were no callbacks for this event 13787c478bd9Sstevel@tonic-gate * or they were already in progress. 13797c478bd9Sstevel@tonic-gate */ 13807c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 13817c478bd9Sstevel@tonic-gate if (as->a_callbacks && 1382843e1988Sjohnlev (cb = as_find_callback(as, AS_UNMAP_EVENT, 1383843e1988Sjohnlev seg->s_base, seg->s_size))) { 1384dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 13857c478bd9Sstevel@tonic-gate as_execute_callback(as, cb, AS_UNMAP_EVENT); 1386a98e9dbfSaguzovsk } else if (!AS_ISNOUNMAPWAIT(as)) { 13877c478bd9Sstevel@tonic-gate if (AS_ISUNMAPWAIT(as) == 0) 13887c478bd9Sstevel@tonic-gate cv_broadcast(&as->a_cv); 13897c478bd9Sstevel@tonic-gate AS_SETUNMAPWAIT(as); 1390dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 13917c478bd9Sstevel@tonic-gate while (AS_ISUNMAPWAIT(as)) 13927c478bd9Sstevel@tonic-gate cv_wait(&as->a_cv, &as->a_contents); 1393a98e9dbfSaguzovsk } else { 1394a98e9dbfSaguzovsk /* 1395a98e9dbfSaguzovsk * We may have raced with 1396a98e9dbfSaguzovsk * segvn_reclaim()/segspt_reclaim(). In this 1397a98e9dbfSaguzovsk * case clean nounmapwait flag and retry since 1398a98e9dbfSaguzovsk * softlockcnt in this segment may be already 1399a98e9dbfSaguzovsk * 0. We don't drop as writer lock so our 1400a98e9dbfSaguzovsk * number of retries without sleeping should 1401a98e9dbfSaguzovsk * be very small. See segvn_reclaim() for 1402a98e9dbfSaguzovsk * more comments. 1403a98e9dbfSaguzovsk */ 1404a98e9dbfSaguzovsk AS_CLRNOUNMAPWAIT(as); 1405a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 1406a98e9dbfSaguzovsk goto retry; 14077c478bd9Sstevel@tonic-gate } 14087c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 14097c478bd9Sstevel@tonic-gate goto top; 14107c478bd9Sstevel@tonic-gate } else if (err == IE_RETRY) { 1411dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 14127c478bd9Sstevel@tonic-gate goto top; 14137c478bd9Sstevel@tonic-gate } else if (err) { 14147c478bd9Sstevel@tonic-gate as_setwatch(as); 1415dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 14167c478bd9Sstevel@tonic-gate return (-1); 14177c478bd9Sstevel@tonic-gate } 14187c478bd9Sstevel@tonic-gate 14197c478bd9Sstevel@tonic-gate as->a_size -= ssize; 142017965fd8SKrishnendu Sadhukhan - Sun Microsystems if (rsize) 142117965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize -= rsize; 14227c478bd9Sstevel@tonic-gate raddr += ssize; 14237c478bd9Sstevel@tonic-gate } 1424dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 14257c478bd9Sstevel@tonic-gate return (0); 14267c478bd9Sstevel@tonic-gate } 14277c478bd9Sstevel@tonic-gate 14287c478bd9Sstevel@tonic-gate static int 142907b65a64Saguzovsk as_map_segvn_segs(struct as *as, caddr_t addr, size_t size, uint_t szcvec, 14307c478bd9Sstevel@tonic-gate int (*crfp)(), struct segvn_crargs *vn_a, int *segcreated) 14317c478bd9Sstevel@tonic-gate { 14327c478bd9Sstevel@tonic-gate uint_t szc; 14337c478bd9Sstevel@tonic-gate uint_t nszc; 14347c478bd9Sstevel@tonic-gate int error; 14357c478bd9Sstevel@tonic-gate caddr_t a; 14367c478bd9Sstevel@tonic-gate caddr_t eaddr; 14377c478bd9Sstevel@tonic-gate size_t segsize; 14387c478bd9Sstevel@tonic-gate struct seg *seg; 14397c478bd9Sstevel@tonic-gate size_t pgsz; 144007b65a64Saguzovsk int do_off = (vn_a->vp != NULL || vn_a->amp != NULL); 144107b65a64Saguzovsk uint_t save_szcvec; 14427c478bd9Sstevel@tonic-gate 1443dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 14447c478bd9Sstevel@tonic-gate ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 14457c478bd9Sstevel@tonic-gate ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 144607b65a64Saguzovsk ASSERT(vn_a->vp == NULL || vn_a->amp == NULL); 144707b65a64Saguzovsk if (!do_off) { 144807b65a64Saguzovsk vn_a->offset = 0; 144907b65a64Saguzovsk } 14507c478bd9Sstevel@tonic-gate 14517c478bd9Sstevel@tonic-gate if (szcvec <= 1) { 14527c478bd9Sstevel@tonic-gate seg = seg_alloc(as, addr, size); 14537c478bd9Sstevel@tonic-gate if (seg == NULL) { 14547c478bd9Sstevel@tonic-gate return (ENOMEM); 14557c478bd9Sstevel@tonic-gate } 14567c478bd9Sstevel@tonic-gate vn_a->szc = 0; 14577c478bd9Sstevel@tonic-gate error = (*crfp)(seg, vn_a); 14587c478bd9Sstevel@tonic-gate if (error != 0) { 14597c478bd9Sstevel@tonic-gate seg_free(seg); 14603a30c6acSsusans } else { 14613a30c6acSsusans as->a_size += size; 146217965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize += size; 14637c478bd9Sstevel@tonic-gate } 14647c478bd9Sstevel@tonic-gate return (error); 14657c478bd9Sstevel@tonic-gate } 14667c478bd9Sstevel@tonic-gate 14677c478bd9Sstevel@tonic-gate eaddr = addr + size; 14687c478bd9Sstevel@tonic-gate save_szcvec = szcvec; 14697c478bd9Sstevel@tonic-gate szcvec >>= 1; 14707c478bd9Sstevel@tonic-gate szc = 0; 14717c478bd9Sstevel@tonic-gate nszc = 0; 14727c478bd9Sstevel@tonic-gate while (szcvec) { 14737c478bd9Sstevel@tonic-gate if ((szcvec & 0x1) == 0) { 14747c478bd9Sstevel@tonic-gate nszc++; 14757c478bd9Sstevel@tonic-gate szcvec >>= 1; 14767c478bd9Sstevel@tonic-gate continue; 14777c478bd9Sstevel@tonic-gate } 14787c478bd9Sstevel@tonic-gate nszc++; 14797c478bd9Sstevel@tonic-gate pgsz = page_get_pagesize(nszc); 14807c478bd9Sstevel@tonic-gate a = (caddr_t)P2ROUNDUP((uintptr_t)addr, pgsz); 14817c478bd9Sstevel@tonic-gate if (a != addr) { 14827c478bd9Sstevel@tonic-gate ASSERT(a < eaddr); 14837c478bd9Sstevel@tonic-gate segsize = a - addr; 14847c478bd9Sstevel@tonic-gate seg = seg_alloc(as, addr, segsize); 14857c478bd9Sstevel@tonic-gate if (seg == NULL) { 14867c478bd9Sstevel@tonic-gate return (ENOMEM); 14877c478bd9Sstevel@tonic-gate } 14887c478bd9Sstevel@tonic-gate vn_a->szc = szc; 14897c478bd9Sstevel@tonic-gate error = (*crfp)(seg, vn_a); 14907c478bd9Sstevel@tonic-gate if (error != 0) { 14917c478bd9Sstevel@tonic-gate seg_free(seg); 14927c478bd9Sstevel@tonic-gate return (error); 14937c478bd9Sstevel@tonic-gate } 14943a30c6acSsusans as->a_size += segsize; 149517965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize += segsize; 14967c478bd9Sstevel@tonic-gate *segcreated = 1; 149707b65a64Saguzovsk if (do_off) { 149807b65a64Saguzovsk vn_a->offset += segsize; 149907b65a64Saguzovsk } 15007c478bd9Sstevel@tonic-gate addr = a; 15017c478bd9Sstevel@tonic-gate } 15027c478bd9Sstevel@tonic-gate szc = nszc; 15037c478bd9Sstevel@tonic-gate szcvec >>= 1; 15047c478bd9Sstevel@tonic-gate } 15057c478bd9Sstevel@tonic-gate 15067c478bd9Sstevel@tonic-gate ASSERT(addr < eaddr); 15077c478bd9Sstevel@tonic-gate szcvec = save_szcvec | 1; /* add 8K pages */ 15087c478bd9Sstevel@tonic-gate while (szcvec) { 15097c478bd9Sstevel@tonic-gate a = (caddr_t)P2ALIGN((uintptr_t)eaddr, pgsz); 15107c478bd9Sstevel@tonic-gate ASSERT(a >= addr); 15117c478bd9Sstevel@tonic-gate if (a != addr) { 15127c478bd9Sstevel@tonic-gate segsize = a - addr; 15137c478bd9Sstevel@tonic-gate seg = seg_alloc(as, addr, segsize); 15147c478bd9Sstevel@tonic-gate if (seg == NULL) { 15157c478bd9Sstevel@tonic-gate return (ENOMEM); 15167c478bd9Sstevel@tonic-gate } 15177c478bd9Sstevel@tonic-gate vn_a->szc = szc; 15187c478bd9Sstevel@tonic-gate error = (*crfp)(seg, vn_a); 15197c478bd9Sstevel@tonic-gate if (error != 0) { 15207c478bd9Sstevel@tonic-gate seg_free(seg); 15217c478bd9Sstevel@tonic-gate return (error); 15227c478bd9Sstevel@tonic-gate } 15233a30c6acSsusans as->a_size += segsize; 152417965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize += segsize; 15257c478bd9Sstevel@tonic-gate *segcreated = 1; 152607b65a64Saguzovsk if (do_off) { 152707b65a64Saguzovsk vn_a->offset += segsize; 152807b65a64Saguzovsk } 15297c478bd9Sstevel@tonic-gate addr = a; 15307c478bd9Sstevel@tonic-gate } 15317c478bd9Sstevel@tonic-gate szcvec &= ~(1 << szc); 15327c478bd9Sstevel@tonic-gate if (szcvec) { 15337c478bd9Sstevel@tonic-gate szc = highbit(szcvec) - 1; 15347c478bd9Sstevel@tonic-gate pgsz = page_get_pagesize(szc); 15357c478bd9Sstevel@tonic-gate } 15367c478bd9Sstevel@tonic-gate } 15377c478bd9Sstevel@tonic-gate ASSERT(addr == eaddr); 15387c478bd9Sstevel@tonic-gate 153907b65a64Saguzovsk return (0); 154007b65a64Saguzovsk } 154107b65a64Saguzovsk 154207b65a64Saguzovsk static int 154307b65a64Saguzovsk as_map_vnsegs(struct as *as, caddr_t addr, size_t size, 154407b65a64Saguzovsk int (*crfp)(), struct segvn_crargs *vn_a, int *segcreated) 154507b65a64Saguzovsk { 1546ec25b48fSsusans uint_t mapflags = vn_a->flags & (MAP_TEXT | MAP_INITDATA); 1547ec25b48fSsusans int type = (vn_a->type == MAP_SHARED) ? MAPPGSZC_SHM : MAPPGSZC_PRIVM; 1548ec25b48fSsusans uint_t szcvec = map_pgszcvec(addr, size, (uintptr_t)addr, mapflags, 1549ec25b48fSsusans type, 0); 155007b65a64Saguzovsk int error; 155107b65a64Saguzovsk struct seg *seg; 155207b65a64Saguzovsk struct vattr va; 155307b65a64Saguzovsk u_offset_t eoff; 155407b65a64Saguzovsk size_t save_size = 0; 15552cb27123Saguzovsk extern size_t textrepl_size_thresh; 155607b65a64Saguzovsk 1557dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 155807b65a64Saguzovsk ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 155907b65a64Saguzovsk ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 156007b65a64Saguzovsk ASSERT(vn_a->vp != NULL); 156107b65a64Saguzovsk ASSERT(vn_a->amp == NULL); 156207b65a64Saguzovsk 156307b65a64Saguzovsk again: 156407b65a64Saguzovsk if (szcvec <= 1) { 156507b65a64Saguzovsk seg = seg_alloc(as, addr, size); 156607b65a64Saguzovsk if (seg == NULL) { 156707b65a64Saguzovsk return (ENOMEM); 156807b65a64Saguzovsk } 156907b65a64Saguzovsk vn_a->szc = 0; 157007b65a64Saguzovsk error = (*crfp)(seg, vn_a); 157107b65a64Saguzovsk if (error != 0) { 157207b65a64Saguzovsk seg_free(seg); 15733a30c6acSsusans } else { 15743a30c6acSsusans as->a_size += size; 157517965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize += size; 157607b65a64Saguzovsk } 157707b65a64Saguzovsk return (error); 157807b65a64Saguzovsk } 157907b65a64Saguzovsk 158007b65a64Saguzovsk va.va_mask = AT_SIZE; 1581da6c28aaSamw if (VOP_GETATTR(vn_a->vp, &va, ATTR_HINT, vn_a->cred, NULL) != 0) { 158207b65a64Saguzovsk szcvec = 0; 158307b65a64Saguzovsk goto again; 158407b65a64Saguzovsk } 158507b65a64Saguzovsk eoff = vn_a->offset & PAGEMASK; 158607b65a64Saguzovsk if (eoff >= va.va_size) { 158707b65a64Saguzovsk szcvec = 0; 158807b65a64Saguzovsk goto again; 158907b65a64Saguzovsk } 159007b65a64Saguzovsk eoff += size; 159107b65a64Saguzovsk if (btopr(va.va_size) < btopr(eoff)) { 159207b65a64Saguzovsk save_size = size; 159307b65a64Saguzovsk size = va.va_size - (vn_a->offset & PAGEMASK); 159407b65a64Saguzovsk size = P2ROUNDUP_TYPED(size, PAGESIZE, size_t); 1595ec25b48fSsusans szcvec = map_pgszcvec(addr, size, (uintptr_t)addr, mapflags, 1596ec25b48fSsusans type, 0); 159707b65a64Saguzovsk if (szcvec <= 1) { 159807b65a64Saguzovsk size = save_size; 159907b65a64Saguzovsk goto again; 160007b65a64Saguzovsk } 160107b65a64Saguzovsk } 160207b65a64Saguzovsk 16032cb27123Saguzovsk if (size > textrepl_size_thresh) { 16042cb27123Saguzovsk vn_a->flags |= _MAP_TEXTREPL; 16052cb27123Saguzovsk } 160607b65a64Saguzovsk error = as_map_segvn_segs(as, addr, size, szcvec, crfp, vn_a, 160707b65a64Saguzovsk segcreated); 160807b65a64Saguzovsk if (error != 0) { 160907b65a64Saguzovsk return (error); 161007b65a64Saguzovsk } 16117c478bd9Sstevel@tonic-gate if (save_size) { 161207b65a64Saguzovsk addr += size; 16137c478bd9Sstevel@tonic-gate size = save_size - size; 161407b65a64Saguzovsk szcvec = 0; 16157c478bd9Sstevel@tonic-gate goto again; 16167c478bd9Sstevel@tonic-gate } 16177c478bd9Sstevel@tonic-gate return (0); 16187c478bd9Sstevel@tonic-gate } 16197c478bd9Sstevel@tonic-gate 1620ec25b48fSsusans /* 1621ec25b48fSsusans * as_map_ansegs: shared or private anonymous memory. Note that the flags 1622ec25b48fSsusans * passed to map_pgszvec cannot be MAP_INITDATA, for anon. 1623ec25b48fSsusans */ 162407b65a64Saguzovsk static int 1625ec25b48fSsusans as_map_ansegs(struct as *as, caddr_t addr, size_t size, 162607b65a64Saguzovsk int (*crfp)(), struct segvn_crargs *vn_a, int *segcreated) 162707b65a64Saguzovsk { 1628ec25b48fSsusans uint_t szcvec; 1629ec25b48fSsusans uchar_t type; 1630ec25b48fSsusans 1631ec25b48fSsusans ASSERT(vn_a->type == MAP_SHARED || vn_a->type == MAP_PRIVATE); 1632ec25b48fSsusans if (vn_a->type == MAP_SHARED) { 1633ec25b48fSsusans type = MAPPGSZC_SHM; 1634ec25b48fSsusans } else if (vn_a->type == MAP_PRIVATE) { 1635ec25b48fSsusans if (vn_a->szc == AS_MAP_HEAP) { 1636ec25b48fSsusans type = MAPPGSZC_HEAP; 1637ec25b48fSsusans } else if (vn_a->szc == AS_MAP_STACK) { 1638ec25b48fSsusans type = MAPPGSZC_STACK; 1639ec25b48fSsusans } else { 1640ec25b48fSsusans type = MAPPGSZC_PRIVM; 1641ec25b48fSsusans } 1642ec25b48fSsusans } 1643ec25b48fSsusans szcvec = map_pgszcvec(addr, size, vn_a->amp == NULL ? 1644ec25b48fSsusans (uintptr_t)addr : (uintptr_t)P2ROUNDUP(vn_a->offset, PAGESIZE), 1645ec25b48fSsusans (vn_a->flags & MAP_TEXT), type, 0); 1646dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 164707b65a64Saguzovsk ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 164807b65a64Saguzovsk ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 164907b65a64Saguzovsk ASSERT(vn_a->vp == NULL); 165007b65a64Saguzovsk 165107b65a64Saguzovsk return (as_map_segvn_segs(as, addr, size, szcvec, 165207b65a64Saguzovsk crfp, vn_a, segcreated)); 165307b65a64Saguzovsk } 165407b65a64Saguzovsk 16557c478bd9Sstevel@tonic-gate int 16567c478bd9Sstevel@tonic-gate as_map(struct as *as, caddr_t addr, size_t size, int (*crfp)(), void *argsp) 165702ff05a9Svsakar { 1658dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 165902ff05a9Svsakar return (as_map_locked(as, addr, size, crfp, argsp)); 166002ff05a9Svsakar } 166102ff05a9Svsakar 166202ff05a9Svsakar int 166302ff05a9Svsakar as_map_locked(struct as *as, caddr_t addr, size_t size, int (*crfp)(), 1664*6430daecSBrandon Baker void *argsp) 16657c478bd9Sstevel@tonic-gate { 16667c478bd9Sstevel@tonic-gate struct seg *seg = NULL; 16677c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 16687c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 16697c478bd9Sstevel@tonic-gate int error; 1670ec25b48fSsusans int unmap = 0; 1671*6430daecSBrandon Baker /* 1672*6430daecSBrandon Baker * The use of a_proc is preferred to handle the case where curproc is 1673*6430daecSBrandon Baker * a door_call server and is allocating memory in the client's (a_proc) 1674*6430daecSBrandon Baker * address space. 1675*6430daecSBrandon Baker * When creating a shared memory segment a_proc will be NULL so we 1676*6430daecSBrandon Baker * fallback to curproc in that case. 1677*6430daecSBrandon Baker */ 1678*6430daecSBrandon Baker struct proc *p = (as->a_proc == NULL) ? curproc : as->a_proc; 1679232cfe63Ssusans struct segvn_crargs crargs; 16807c478bd9Sstevel@tonic-gate 16817c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 16827c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 1683843e1988Sjohnlev (size_t)raddr; 16847c478bd9Sstevel@tonic-gate 16857c478bd9Sstevel@tonic-gate /* 16867c478bd9Sstevel@tonic-gate * check for wrap around 16877c478bd9Sstevel@tonic-gate */ 16887c478bd9Sstevel@tonic-gate if ((raddr + rsize < raddr) || (as->a_size > (ULONG_MAX - size))) { 1689dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 16907c478bd9Sstevel@tonic-gate return (ENOMEM); 16917c478bd9Sstevel@tonic-gate } 16927c478bd9Sstevel@tonic-gate 16937c478bd9Sstevel@tonic-gate as->a_updatedir = 1; /* inform /proc */ 16947c478bd9Sstevel@tonic-gate gethrestime(&as->a_updatetime); 16957c478bd9Sstevel@tonic-gate 16967c478bd9Sstevel@tonic-gate if (as != &kas && as->a_size + rsize > (size_t)p->p_vmem_ctl) { 1697dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 16987c478bd9Sstevel@tonic-gate 16997c478bd9Sstevel@tonic-gate (void) rctl_action(rctlproc_legacy[RLIMIT_VMEM], p->p_rctls, p, 17007c478bd9Sstevel@tonic-gate RCA_UNSAFE_ALL); 17017c478bd9Sstevel@tonic-gate 17027c478bd9Sstevel@tonic-gate return (ENOMEM); 17037c478bd9Sstevel@tonic-gate } 17047c478bd9Sstevel@tonic-gate 1705ec25b48fSsusans if (AS_MAP_CHECK_VNODE_LPOOB(crfp, argsp)) { 1706232cfe63Ssusans crargs = *(struct segvn_crargs *)argsp; 1707232cfe63Ssusans error = as_map_vnsegs(as, raddr, rsize, crfp, &crargs, &unmap); 1708ec25b48fSsusans if (error != 0) { 1709dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 1710ec25b48fSsusans if (unmap) { 1711ec25b48fSsusans (void) as_unmap(as, addr, size); 1712ec25b48fSsusans } 1713ec25b48fSsusans return (error); 171407b65a64Saguzovsk } 1715ec25b48fSsusans } else if (AS_MAP_CHECK_ANON_LPOOB(crfp, argsp)) { 1716232cfe63Ssusans crargs = *(struct segvn_crargs *)argsp; 1717232cfe63Ssusans error = as_map_ansegs(as, raddr, rsize, crfp, &crargs, &unmap); 17187c478bd9Sstevel@tonic-gate if (error != 0) { 1719dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17207c478bd9Sstevel@tonic-gate if (unmap) { 17217c478bd9Sstevel@tonic-gate (void) as_unmap(as, addr, size); 17227c478bd9Sstevel@tonic-gate } 17237c478bd9Sstevel@tonic-gate return (error); 17247c478bd9Sstevel@tonic-gate } 17257c478bd9Sstevel@tonic-gate } else { 17267c478bd9Sstevel@tonic-gate seg = seg_alloc(as, addr, size); 17277c478bd9Sstevel@tonic-gate if (seg == NULL) { 1728dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17297c478bd9Sstevel@tonic-gate return (ENOMEM); 17307c478bd9Sstevel@tonic-gate } 17317c478bd9Sstevel@tonic-gate 17327c478bd9Sstevel@tonic-gate error = (*crfp)(seg, argsp); 17337c478bd9Sstevel@tonic-gate if (error != 0) { 17347c478bd9Sstevel@tonic-gate seg_free(seg); 1735dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17367c478bd9Sstevel@tonic-gate return (error); 17377c478bd9Sstevel@tonic-gate } 17383a30c6acSsusans /* 17393a30c6acSsusans * Add size now so as_unmap will work if as_ctl fails. 17403a30c6acSsusans */ 17413a30c6acSsusans as->a_size += rsize; 174217965fd8SKrishnendu Sadhukhan - Sun Microsystems as->a_resvsize += rsize; 17437c478bd9Sstevel@tonic-gate } 17447c478bd9Sstevel@tonic-gate 17457c478bd9Sstevel@tonic-gate as_setwatch(as); 17467c478bd9Sstevel@tonic-gate 17477c478bd9Sstevel@tonic-gate /* 17487c478bd9Sstevel@tonic-gate * If the address space is locked, 17497c478bd9Sstevel@tonic-gate * establish memory locks for the new segment. 17507c478bd9Sstevel@tonic-gate */ 17517c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 17527c478bd9Sstevel@tonic-gate if (AS_ISPGLCK(as)) { 17537c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 1754dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17557c478bd9Sstevel@tonic-gate error = as_ctl(as, addr, size, MC_LOCK, 0, 0, NULL, 0); 17567c478bd9Sstevel@tonic-gate if (error != 0) 17577c478bd9Sstevel@tonic-gate (void) as_unmap(as, addr, size); 17587c478bd9Sstevel@tonic-gate } else { 17597c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 1760dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17617c478bd9Sstevel@tonic-gate } 17627c478bd9Sstevel@tonic-gate return (error); 17637c478bd9Sstevel@tonic-gate } 17647c478bd9Sstevel@tonic-gate 17657c478bd9Sstevel@tonic-gate 17667c478bd9Sstevel@tonic-gate /* 17677c478bd9Sstevel@tonic-gate * Delete all segments in the address space marked with S_PURGE. 17687c478bd9Sstevel@tonic-gate * This is currently used for Sparc V9 nofault ASI segments (seg_nf.c). 17697c478bd9Sstevel@tonic-gate * These segments are deleted as a first step before calls to as_gap(), so 17707c478bd9Sstevel@tonic-gate * that they don't affect mmap() or shmat(). 17717c478bd9Sstevel@tonic-gate */ 17727c478bd9Sstevel@tonic-gate void 17737c478bd9Sstevel@tonic-gate as_purge(struct as *as) 17747c478bd9Sstevel@tonic-gate { 17757c478bd9Sstevel@tonic-gate struct seg *seg; 17767c478bd9Sstevel@tonic-gate struct seg *next_seg; 17777c478bd9Sstevel@tonic-gate 17787c478bd9Sstevel@tonic-gate /* 17797c478bd9Sstevel@tonic-gate * the setting of NEEDSPURGE is protect by as_rangelock(), so 17807c478bd9Sstevel@tonic-gate * no need to grab a_contents mutex for this check 17817c478bd9Sstevel@tonic-gate */ 17827c478bd9Sstevel@tonic-gate if ((as->a_flags & AS_NEEDSPURGE) == 0) 17837c478bd9Sstevel@tonic-gate return; 17847c478bd9Sstevel@tonic-gate 1785dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 17867c478bd9Sstevel@tonic-gate next_seg = NULL; 17877c478bd9Sstevel@tonic-gate seg = AS_SEGFIRST(as); 17887c478bd9Sstevel@tonic-gate while (seg != NULL) { 17897c478bd9Sstevel@tonic-gate next_seg = AS_SEGNEXT(as, seg); 17907c478bd9Sstevel@tonic-gate if (seg->s_flags & S_PURGE) 17917c478bd9Sstevel@tonic-gate SEGOP_UNMAP(seg, seg->s_base, seg->s_size); 17927c478bd9Sstevel@tonic-gate seg = next_seg; 17937c478bd9Sstevel@tonic-gate } 1794dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 17957c478bd9Sstevel@tonic-gate 17967c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 17977c478bd9Sstevel@tonic-gate as->a_flags &= ~AS_NEEDSPURGE; 17987c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 17997c478bd9Sstevel@tonic-gate } 18007c478bd9Sstevel@tonic-gate 18017c478bd9Sstevel@tonic-gate /* 180246ab9534Smec * Find a hole within [*basep, *basep + *lenp), which contains a mappable 180346ab9534Smec * range of addresses at least "minlen" long, where the base of the range is 180446ab9534Smec * at "off" phase from an "align" boundary and there is space for a 180546ab9534Smec * "redzone"-sized redzone on eithe rside of the range. Thus, 180646ab9534Smec * if align was 4M and off was 16k, the user wants a hole which will start 180746ab9534Smec * 16k into a 4M page. 18087c478bd9Sstevel@tonic-gate * 18097c478bd9Sstevel@tonic-gate * If flags specifies AH_HI, the hole will have the highest possible address 18107c478bd9Sstevel@tonic-gate * in the range. We use the as->a_lastgap field to figure out where to 18117c478bd9Sstevel@tonic-gate * start looking for a gap. 18127c478bd9Sstevel@tonic-gate * 18137c478bd9Sstevel@tonic-gate * Otherwise, the gap will have the lowest possible address. 18147c478bd9Sstevel@tonic-gate * 18157c478bd9Sstevel@tonic-gate * If flags specifies AH_CONTAIN, the hole will contain the address addr. 18167c478bd9Sstevel@tonic-gate * 181746ab9534Smec * If an adequate hole is found, *basep and *lenp are set to reflect the part of 181846ab9534Smec * the hole that is within range, and 0 is returned. On failure, -1 is returned. 18197c478bd9Sstevel@tonic-gate * 18207c478bd9Sstevel@tonic-gate * NOTE: This routine is not correct when base+len overflows caddr_t. 18217c478bd9Sstevel@tonic-gate */ 18227c478bd9Sstevel@tonic-gate int 182346ab9534Smec as_gap_aligned(struct as *as, size_t minlen, caddr_t *basep, size_t *lenp, 182446ab9534Smec uint_t flags, caddr_t addr, size_t align, size_t redzone, size_t off) 18257c478bd9Sstevel@tonic-gate { 18267c478bd9Sstevel@tonic-gate caddr_t lobound = *basep; 18277c478bd9Sstevel@tonic-gate caddr_t hibound = lobound + *lenp; 18287c478bd9Sstevel@tonic-gate struct seg *lseg, *hseg; 18297c478bd9Sstevel@tonic-gate caddr_t lo, hi; 18307c478bd9Sstevel@tonic-gate int forward; 18317c478bd9Sstevel@tonic-gate caddr_t save_base; 18327c478bd9Sstevel@tonic-gate size_t save_len; 18337d87bd0eSmec size_t save_minlen; 18347d87bd0eSmec size_t save_redzone; 18357d87bd0eSmec int fast_path = 1; 18367c478bd9Sstevel@tonic-gate 18377c478bd9Sstevel@tonic-gate save_base = *basep; 18387c478bd9Sstevel@tonic-gate save_len = *lenp; 18397d87bd0eSmec save_minlen = minlen; 18407d87bd0eSmec save_redzone = redzone; 18417d87bd0eSmec 18427d87bd0eSmec /* 18437d87bd0eSmec * For the first pass/fast_path, just add align and redzone into 18447d87bd0eSmec * minlen since if we get an allocation, we can guarantee that it 18457d87bd0eSmec * will fit the alignment and redzone requested. 18467d87bd0eSmec * This increases the chance that hibound will be adjusted to 18477d87bd0eSmec * a_lastgap->s_base which will likely allow us to find an 18487d87bd0eSmec * acceptable hole in the address space quicker. 18497d87bd0eSmec * If we can't find a hole with this fast_path, then we look for 18507d87bd0eSmec * smaller holes in which the alignment and offset may allow 18517d87bd0eSmec * the allocation to fit. 18527d87bd0eSmec */ 18537d87bd0eSmec minlen += align; 18547d87bd0eSmec minlen += 2 * redzone; 18557d87bd0eSmec redzone = 0; 18567d87bd0eSmec 1857dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 18587c478bd9Sstevel@tonic-gate if (AS_SEGFIRST(as) == NULL) { 185946ab9534Smec if (valid_va_range_aligned(basep, lenp, minlen, flags & AH_DIR, 186046ab9534Smec align, redzone, off)) { 1861dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 18627c478bd9Sstevel@tonic-gate return (0); 18637c478bd9Sstevel@tonic-gate } else { 1864dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 18657c478bd9Sstevel@tonic-gate *basep = save_base; 18667c478bd9Sstevel@tonic-gate *lenp = save_len; 18677c478bd9Sstevel@tonic-gate return (-1); 18687c478bd9Sstevel@tonic-gate } 18697c478bd9Sstevel@tonic-gate } 18707c478bd9Sstevel@tonic-gate 18717d87bd0eSmec retry: 18727c478bd9Sstevel@tonic-gate /* 18737c478bd9Sstevel@tonic-gate * Set up to iterate over all the inter-segment holes in the given 18747c478bd9Sstevel@tonic-gate * direction. lseg is NULL for the lowest-addressed hole and hseg is 18757c478bd9Sstevel@tonic-gate * NULL for the highest-addressed hole. If moving backwards, we reset 18767c478bd9Sstevel@tonic-gate * sseg to denote the highest-addressed segment. 18777c478bd9Sstevel@tonic-gate */ 18787c478bd9Sstevel@tonic-gate forward = (flags & AH_DIR) == AH_LO; 18797c478bd9Sstevel@tonic-gate if (forward) { 18807c478bd9Sstevel@tonic-gate hseg = as_findseg(as, lobound, 1); 18817c478bd9Sstevel@tonic-gate lseg = AS_SEGPREV(as, hseg); 18827c478bd9Sstevel@tonic-gate } else { 18837c478bd9Sstevel@tonic-gate 18847c478bd9Sstevel@tonic-gate /* 18857c478bd9Sstevel@tonic-gate * If allocating at least as much as the last allocation, 18867c478bd9Sstevel@tonic-gate * use a_lastgap's base as a better estimate of hibound. 18877c478bd9Sstevel@tonic-gate */ 18887c478bd9Sstevel@tonic-gate if (as->a_lastgap && 18897c478bd9Sstevel@tonic-gate minlen >= as->a_lastgap->s_size && 18907c478bd9Sstevel@tonic-gate hibound >= as->a_lastgap->s_base) 18917c478bd9Sstevel@tonic-gate hibound = as->a_lastgap->s_base; 18927c478bd9Sstevel@tonic-gate 18937c478bd9Sstevel@tonic-gate hseg = as_findseg(as, hibound, 1); 18947c478bd9Sstevel@tonic-gate if (hseg->s_base + hseg->s_size < hibound) { 18957c478bd9Sstevel@tonic-gate lseg = hseg; 18967c478bd9Sstevel@tonic-gate hseg = NULL; 18977c478bd9Sstevel@tonic-gate } else { 18987c478bd9Sstevel@tonic-gate lseg = AS_SEGPREV(as, hseg); 18997c478bd9Sstevel@tonic-gate } 19007c478bd9Sstevel@tonic-gate } 19017c478bd9Sstevel@tonic-gate 19027c478bd9Sstevel@tonic-gate for (;;) { 19037c478bd9Sstevel@tonic-gate /* 19047c478bd9Sstevel@tonic-gate * Set lo and hi to the hole's boundaries. (We should really 19057c478bd9Sstevel@tonic-gate * use MAXADDR in place of hibound in the expression below, 19067c478bd9Sstevel@tonic-gate * but can't express it easily; using hibound in its place is 19077c478bd9Sstevel@tonic-gate * harmless.) 19087c478bd9Sstevel@tonic-gate */ 19097c478bd9Sstevel@tonic-gate lo = (lseg == NULL) ? 0 : lseg->s_base + lseg->s_size; 19107c478bd9Sstevel@tonic-gate hi = (hseg == NULL) ? hibound : hseg->s_base; 19117c478bd9Sstevel@tonic-gate /* 19127c478bd9Sstevel@tonic-gate * If the iteration has moved past the interval from lobound 19137c478bd9Sstevel@tonic-gate * to hibound it's pointless to continue. 19147c478bd9Sstevel@tonic-gate */ 19157c478bd9Sstevel@tonic-gate if ((forward && lo > hibound) || (!forward && hi < lobound)) 19167c478bd9Sstevel@tonic-gate break; 19177c478bd9Sstevel@tonic-gate else if (lo > hibound || hi < lobound) 19187c478bd9Sstevel@tonic-gate goto cont; 19197c478bd9Sstevel@tonic-gate /* 19207c478bd9Sstevel@tonic-gate * Candidate hole lies at least partially within the allowable 19217c478bd9Sstevel@tonic-gate * range. Restrict it to fall completely within that range, 19227c478bd9Sstevel@tonic-gate * i.e., to [max(lo, lobound), min(hi, hibound)]. 19237c478bd9Sstevel@tonic-gate */ 19247c478bd9Sstevel@tonic-gate if (lo < lobound) 19257c478bd9Sstevel@tonic-gate lo = lobound; 19267c478bd9Sstevel@tonic-gate if (hi > hibound) 19277c478bd9Sstevel@tonic-gate hi = hibound; 19287c478bd9Sstevel@tonic-gate /* 19297c478bd9Sstevel@tonic-gate * Verify that the candidate hole is big enough and meets 19307d87bd0eSmec * hardware constraints. If the hole is too small, no need 19317d87bd0eSmec * to do the further checks since they will fail. 19327c478bd9Sstevel@tonic-gate */ 19337c478bd9Sstevel@tonic-gate *basep = lo; 19347c478bd9Sstevel@tonic-gate *lenp = hi - lo; 19357d87bd0eSmec if (*lenp >= minlen && valid_va_range_aligned(basep, lenp, 19367d87bd0eSmec minlen, forward ? AH_LO : AH_HI, align, redzone, off) && 19377c478bd9Sstevel@tonic-gate ((flags & AH_CONTAIN) == 0 || 19387c478bd9Sstevel@tonic-gate (*basep <= addr && *basep + *lenp > addr))) { 19397c478bd9Sstevel@tonic-gate if (!forward) 19407c478bd9Sstevel@tonic-gate as->a_lastgap = hseg; 19417c478bd9Sstevel@tonic-gate if (hseg != NULL) 19427c478bd9Sstevel@tonic-gate as->a_lastgaphl = hseg; 19437c478bd9Sstevel@tonic-gate else 19447c478bd9Sstevel@tonic-gate as->a_lastgaphl = lseg; 1945dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 19467c478bd9Sstevel@tonic-gate return (0); 19477c478bd9Sstevel@tonic-gate } 19487c478bd9Sstevel@tonic-gate cont: 19497c478bd9Sstevel@tonic-gate /* 19507c478bd9Sstevel@tonic-gate * Move to the next hole. 19517c478bd9Sstevel@tonic-gate */ 19527c478bd9Sstevel@tonic-gate if (forward) { 19537c478bd9Sstevel@tonic-gate lseg = hseg; 19547c478bd9Sstevel@tonic-gate if (lseg == NULL) 19557c478bd9Sstevel@tonic-gate break; 19567c478bd9Sstevel@tonic-gate hseg = AS_SEGNEXT(as, hseg); 19577c478bd9Sstevel@tonic-gate } else { 19587c478bd9Sstevel@tonic-gate hseg = lseg; 19597c478bd9Sstevel@tonic-gate if (hseg == NULL) 19607c478bd9Sstevel@tonic-gate break; 19617c478bd9Sstevel@tonic-gate lseg = AS_SEGPREV(as, lseg); 19627c478bd9Sstevel@tonic-gate } 19637c478bd9Sstevel@tonic-gate } 19647d87bd0eSmec if (fast_path && (align != 0 || save_redzone != 0)) { 19657d87bd0eSmec fast_path = 0; 19667d87bd0eSmec minlen = save_minlen; 19677d87bd0eSmec redzone = save_redzone; 19687d87bd0eSmec goto retry; 19697d87bd0eSmec } 19707c478bd9Sstevel@tonic-gate *basep = save_base; 19717c478bd9Sstevel@tonic-gate *lenp = save_len; 1972dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 19737c478bd9Sstevel@tonic-gate return (-1); 19747c478bd9Sstevel@tonic-gate } 19757c478bd9Sstevel@tonic-gate 197646ab9534Smec /* 197746ab9534Smec * Find a hole of at least size minlen within [*basep, *basep + *lenp). 197846ab9534Smec * 197946ab9534Smec * If flags specifies AH_HI, the hole will have the highest possible address 198046ab9534Smec * in the range. We use the as->a_lastgap field to figure out where to 198146ab9534Smec * start looking for a gap. 198246ab9534Smec * 198346ab9534Smec * Otherwise, the gap will have the lowest possible address. 198446ab9534Smec * 198546ab9534Smec * If flags specifies AH_CONTAIN, the hole will contain the address addr. 198646ab9534Smec * 198746ab9534Smec * If an adequate hole is found, base and len are set to reflect the part of 198846ab9534Smec * the hole that is within range, and 0 is returned, otherwise, 198946ab9534Smec * -1 is returned. 199046ab9534Smec * 199146ab9534Smec * NOTE: This routine is not correct when base+len overflows caddr_t. 199246ab9534Smec */ 199346ab9534Smec int 199446ab9534Smec as_gap(struct as *as, size_t minlen, caddr_t *basep, size_t *lenp, uint_t flags, 199546ab9534Smec caddr_t addr) 199646ab9534Smec { 199746ab9534Smec 199846ab9534Smec return (as_gap_aligned(as, minlen, basep, lenp, flags, addr, 0, 0, 0)); 199946ab9534Smec } 200046ab9534Smec 20017c478bd9Sstevel@tonic-gate /* 20027c478bd9Sstevel@tonic-gate * Return the next range within [base, base + len) that is backed 20037c478bd9Sstevel@tonic-gate * with "real memory". Skip holes and non-seg_vn segments. 20047c478bd9Sstevel@tonic-gate * We're lazy and only return one segment at a time. 20057c478bd9Sstevel@tonic-gate */ 20067c478bd9Sstevel@tonic-gate int 20077c478bd9Sstevel@tonic-gate as_memory(struct as *as, caddr_t *basep, size_t *lenp) 20087c478bd9Sstevel@tonic-gate { 20097c478bd9Sstevel@tonic-gate extern struct seg_ops segspt_shmops; /* needs a header file */ 20107c478bd9Sstevel@tonic-gate struct seg *seg; 20117c478bd9Sstevel@tonic-gate caddr_t addr, eaddr; 20127c478bd9Sstevel@tonic-gate caddr_t segend; 20137c478bd9Sstevel@tonic-gate 2014dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 20157c478bd9Sstevel@tonic-gate 20167c478bd9Sstevel@tonic-gate addr = *basep; 20177c478bd9Sstevel@tonic-gate eaddr = addr + *lenp; 20187c478bd9Sstevel@tonic-gate 20197c478bd9Sstevel@tonic-gate seg = as_findseg(as, addr, 0); 20207c478bd9Sstevel@tonic-gate if (seg != NULL) 20217c478bd9Sstevel@tonic-gate addr = MAX(seg->s_base, addr); 20227c478bd9Sstevel@tonic-gate 20237c478bd9Sstevel@tonic-gate for (;;) { 20247c478bd9Sstevel@tonic-gate if (seg == NULL || addr >= eaddr || eaddr <= seg->s_base) { 2025dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 20267c478bd9Sstevel@tonic-gate return (EINVAL); 20277c478bd9Sstevel@tonic-gate } 20287c478bd9Sstevel@tonic-gate 20297c478bd9Sstevel@tonic-gate if (seg->s_ops == &segvn_ops) { 20307c478bd9Sstevel@tonic-gate segend = seg->s_base + seg->s_size; 20317c478bd9Sstevel@tonic-gate break; 20327c478bd9Sstevel@tonic-gate } 20337c478bd9Sstevel@tonic-gate 20347c478bd9Sstevel@tonic-gate /* 20357c478bd9Sstevel@tonic-gate * We do ISM by looking into the private data 20367c478bd9Sstevel@tonic-gate * to determine the real size of the segment. 20377c478bd9Sstevel@tonic-gate */ 20387c478bd9Sstevel@tonic-gate if (seg->s_ops == &segspt_shmops) { 20397c478bd9Sstevel@tonic-gate segend = seg->s_base + spt_realsize(seg); 20407c478bd9Sstevel@tonic-gate if (addr < segend) 20417c478bd9Sstevel@tonic-gate break; 20427c478bd9Sstevel@tonic-gate } 20437c478bd9Sstevel@tonic-gate 20447c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 20457c478bd9Sstevel@tonic-gate 20467c478bd9Sstevel@tonic-gate if (seg != NULL) 20477c478bd9Sstevel@tonic-gate addr = seg->s_base; 20487c478bd9Sstevel@tonic-gate } 20497c478bd9Sstevel@tonic-gate 20507c478bd9Sstevel@tonic-gate *basep = addr; 20517c478bd9Sstevel@tonic-gate 20527c478bd9Sstevel@tonic-gate if (segend > eaddr) 20537c478bd9Sstevel@tonic-gate *lenp = eaddr - addr; 20547c478bd9Sstevel@tonic-gate else 20557c478bd9Sstevel@tonic-gate *lenp = segend - addr; 20567c478bd9Sstevel@tonic-gate 2057dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 20587c478bd9Sstevel@tonic-gate return (0); 20597c478bd9Sstevel@tonic-gate } 20607c478bd9Sstevel@tonic-gate 20617c478bd9Sstevel@tonic-gate /* 20627c478bd9Sstevel@tonic-gate * Swap the pages associated with the address space as out to 20637c478bd9Sstevel@tonic-gate * secondary storage, returning the number of bytes actually 20647c478bd9Sstevel@tonic-gate * swapped. 20657c478bd9Sstevel@tonic-gate * 20667c478bd9Sstevel@tonic-gate * The value returned is intended to correlate well with the process's 20677c478bd9Sstevel@tonic-gate * memory requirements. Its usefulness for this purpose depends on 20687c478bd9Sstevel@tonic-gate * how well the segment-level routines do at returning accurate 20697c478bd9Sstevel@tonic-gate * information. 20707c478bd9Sstevel@tonic-gate */ 20717c478bd9Sstevel@tonic-gate size_t 20727c478bd9Sstevel@tonic-gate as_swapout(struct as *as) 20737c478bd9Sstevel@tonic-gate { 20747c478bd9Sstevel@tonic-gate struct seg *seg; 20757c478bd9Sstevel@tonic-gate size_t swpcnt = 0; 20767c478bd9Sstevel@tonic-gate 20777c478bd9Sstevel@tonic-gate /* 20787c478bd9Sstevel@tonic-gate * Kernel-only processes have given up their address 20797c478bd9Sstevel@tonic-gate * spaces. Of course, we shouldn't be attempting to 20807c478bd9Sstevel@tonic-gate * swap out such processes in the first place... 20817c478bd9Sstevel@tonic-gate */ 20827c478bd9Sstevel@tonic-gate if (as == NULL) 20837c478bd9Sstevel@tonic-gate return (0); 20847c478bd9Sstevel@tonic-gate 2085dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 20867c478bd9Sstevel@tonic-gate 20877c478bd9Sstevel@tonic-gate /* 20887c478bd9Sstevel@tonic-gate * Free all mapping resources associated with the address 20897c478bd9Sstevel@tonic-gate * space. The segment-level swapout routines capitalize 20907c478bd9Sstevel@tonic-gate * on this unmapping by scavanging pages that have become 20917c478bd9Sstevel@tonic-gate * unmapped here. 20927c478bd9Sstevel@tonic-gate */ 20937c478bd9Sstevel@tonic-gate hat_swapout(as->a_hat); 20947c478bd9Sstevel@tonic-gate 20957c478bd9Sstevel@tonic-gate /* 20967c478bd9Sstevel@tonic-gate * Call the swapout routines of all segments in the address 20977c478bd9Sstevel@tonic-gate * space to do the actual work, accumulating the amount of 20987c478bd9Sstevel@tonic-gate * space reclaimed. 20997c478bd9Sstevel@tonic-gate */ 21007c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) { 21017c478bd9Sstevel@tonic-gate struct seg_ops *ov = seg->s_ops; 21027c478bd9Sstevel@tonic-gate 21037c478bd9Sstevel@tonic-gate /* 21047c478bd9Sstevel@tonic-gate * We have to check to see if the seg has 21057c478bd9Sstevel@tonic-gate * an ops vector because the seg may have 21067c478bd9Sstevel@tonic-gate * been in the middle of being set up when 21077c478bd9Sstevel@tonic-gate * the process was picked for swapout. 21087c478bd9Sstevel@tonic-gate */ 21097c478bd9Sstevel@tonic-gate if ((ov != NULL) && (ov->swapout != NULL)) 21107c478bd9Sstevel@tonic-gate swpcnt += SEGOP_SWAPOUT(seg); 21117c478bd9Sstevel@tonic-gate } 2112dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 21137c478bd9Sstevel@tonic-gate return (swpcnt); 21147c478bd9Sstevel@tonic-gate } 21157c478bd9Sstevel@tonic-gate 21167c478bd9Sstevel@tonic-gate /* 21177c478bd9Sstevel@tonic-gate * Determine whether data from the mappings in interval [addr, addr + size) 21187c478bd9Sstevel@tonic-gate * are in the primary memory (core) cache. 21197c478bd9Sstevel@tonic-gate */ 21207c478bd9Sstevel@tonic-gate int 21217c478bd9Sstevel@tonic-gate as_incore(struct as *as, caddr_t addr, 21227c478bd9Sstevel@tonic-gate size_t size, char *vec, size_t *sizep) 21237c478bd9Sstevel@tonic-gate { 21247c478bd9Sstevel@tonic-gate struct seg *seg; 21257c478bd9Sstevel@tonic-gate size_t ssize; 21267c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 21277c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 21287c478bd9Sstevel@tonic-gate size_t isize; /* iteration size */ 21297c478bd9Sstevel@tonic-gate int error = 0; /* result, assume success */ 21307c478bd9Sstevel@tonic-gate 21317c478bd9Sstevel@tonic-gate *sizep = 0; 21327c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 21337c478bd9Sstevel@tonic-gate rsize = ((((size_t)addr + size) + PAGEOFFSET) & PAGEMASK) - 2134843e1988Sjohnlev (size_t)raddr; 21357c478bd9Sstevel@tonic-gate 21367c478bd9Sstevel@tonic-gate if (raddr + rsize < raddr) /* check for wraparound */ 21377c478bd9Sstevel@tonic-gate return (ENOMEM); 21387c478bd9Sstevel@tonic-gate 2139dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 21407c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 21417c478bd9Sstevel@tonic-gate if (seg == NULL) { 2142dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 21437c478bd9Sstevel@tonic-gate return (-1); 21447c478bd9Sstevel@tonic-gate } 21457c478bd9Sstevel@tonic-gate 21467c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= ssize, raddr += ssize) { 21477c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 21487c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 21497c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 21507c478bd9Sstevel@tonic-gate error = -1; 21517c478bd9Sstevel@tonic-gate break; 21527c478bd9Sstevel@tonic-gate } 21537c478bd9Sstevel@tonic-gate } 21547c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) 21557c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 21567c478bd9Sstevel@tonic-gate else 21577c478bd9Sstevel@tonic-gate ssize = rsize; 21587c478bd9Sstevel@tonic-gate *sizep += isize = SEGOP_INCORE(seg, raddr, ssize, vec); 21597c478bd9Sstevel@tonic-gate if (isize != ssize) { 21607c478bd9Sstevel@tonic-gate error = -1; 21617c478bd9Sstevel@tonic-gate break; 21627c478bd9Sstevel@tonic-gate } 21637c478bd9Sstevel@tonic-gate vec += btopr(ssize); 21647c478bd9Sstevel@tonic-gate } 2165dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 21667c478bd9Sstevel@tonic-gate return (error); 21677c478bd9Sstevel@tonic-gate } 21687c478bd9Sstevel@tonic-gate 21697c478bd9Sstevel@tonic-gate static void 21707c478bd9Sstevel@tonic-gate as_segunlock(struct seg *seg, caddr_t addr, int attr, 2171*6430daecSBrandon Baker ulong_t *bitmap, size_t position, size_t npages) 21727c478bd9Sstevel@tonic-gate { 21737c478bd9Sstevel@tonic-gate caddr_t range_start; 21747c478bd9Sstevel@tonic-gate size_t pos1 = position; 21757c478bd9Sstevel@tonic-gate size_t pos2; 21767c478bd9Sstevel@tonic-gate size_t size; 21777c478bd9Sstevel@tonic-gate size_t end_pos = npages + position; 21787c478bd9Sstevel@tonic-gate 21797c478bd9Sstevel@tonic-gate while (bt_range(bitmap, &pos1, &pos2, end_pos)) { 21807c478bd9Sstevel@tonic-gate size = ptob((pos2 - pos1)); 21817c478bd9Sstevel@tonic-gate range_start = (caddr_t)((uintptr_t)addr + 2182843e1988Sjohnlev ptob(pos1 - position)); 21837c478bd9Sstevel@tonic-gate 21847c478bd9Sstevel@tonic-gate (void) SEGOP_LOCKOP(seg, range_start, size, attr, MC_UNLOCK, 2185843e1988Sjohnlev (ulong_t *)NULL, (size_t)NULL); 21867c478bd9Sstevel@tonic-gate pos1 = pos2; 21877c478bd9Sstevel@tonic-gate } 21887c478bd9Sstevel@tonic-gate } 21897c478bd9Sstevel@tonic-gate 21907c478bd9Sstevel@tonic-gate static void 21917c478bd9Sstevel@tonic-gate as_unlockerr(struct as *as, int attr, ulong_t *mlock_map, 2192*6430daecSBrandon Baker caddr_t raddr, size_t rsize) 21937c478bd9Sstevel@tonic-gate { 21947c478bd9Sstevel@tonic-gate struct seg *seg = as_segat(as, raddr); 21957c478bd9Sstevel@tonic-gate size_t ssize; 21967c478bd9Sstevel@tonic-gate 21977c478bd9Sstevel@tonic-gate while (rsize != 0) { 21987c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) 21997c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 22007c478bd9Sstevel@tonic-gate 22017c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) 22027c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 22037c478bd9Sstevel@tonic-gate else 22047c478bd9Sstevel@tonic-gate ssize = rsize; 22057c478bd9Sstevel@tonic-gate 22067c478bd9Sstevel@tonic-gate as_segunlock(seg, raddr, attr, mlock_map, 0, btopr(ssize)); 22077c478bd9Sstevel@tonic-gate 22087c478bd9Sstevel@tonic-gate rsize -= ssize; 22097c478bd9Sstevel@tonic-gate raddr += ssize; 22107c478bd9Sstevel@tonic-gate } 22117c478bd9Sstevel@tonic-gate } 22127c478bd9Sstevel@tonic-gate 22137c478bd9Sstevel@tonic-gate /* 22147c478bd9Sstevel@tonic-gate * Cache control operations over the interval [addr, addr + size) in 22157c478bd9Sstevel@tonic-gate * address space "as". 22167c478bd9Sstevel@tonic-gate */ 22177c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 22187c478bd9Sstevel@tonic-gate int 22197c478bd9Sstevel@tonic-gate as_ctl(struct as *as, caddr_t addr, size_t size, int func, int attr, 22207c478bd9Sstevel@tonic-gate uintptr_t arg, ulong_t *lock_map, size_t pos) 22217c478bd9Sstevel@tonic-gate { 22227c478bd9Sstevel@tonic-gate struct seg *seg; /* working segment */ 22237c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 22247c478bd9Sstevel@tonic-gate caddr_t initraddr; /* saved initial rounded down addr */ 22257c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 22267c478bd9Sstevel@tonic-gate size_t initrsize; /* saved initial rounded up size */ 22277c478bd9Sstevel@tonic-gate size_t ssize; /* size of seg */ 22287c478bd9Sstevel@tonic-gate int error = 0; /* result */ 22297c478bd9Sstevel@tonic-gate size_t mlock_size; /* size of bitmap */ 22307c478bd9Sstevel@tonic-gate ulong_t *mlock_map; /* pointer to bitmap used */ 22317c478bd9Sstevel@tonic-gate /* to represent the locked */ 22327c478bd9Sstevel@tonic-gate /* pages. */ 22337c478bd9Sstevel@tonic-gate retry: 22347c478bd9Sstevel@tonic-gate if (error == IE_RETRY) 2235dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 22367c478bd9Sstevel@tonic-gate else 2237dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 22387c478bd9Sstevel@tonic-gate 22397c478bd9Sstevel@tonic-gate /* 22407c478bd9Sstevel@tonic-gate * If these are address space lock/unlock operations, loop over 22417c478bd9Sstevel@tonic-gate * all segments in the address space, as appropriate. 22427c478bd9Sstevel@tonic-gate */ 22437c478bd9Sstevel@tonic-gate if (func == MC_LOCKAS) { 22447c478bd9Sstevel@tonic-gate size_t npages, idx; 22457c478bd9Sstevel@tonic-gate size_t rlen = 0; /* rounded as length */ 22467c478bd9Sstevel@tonic-gate 22477c478bd9Sstevel@tonic-gate idx = pos; 22487c478bd9Sstevel@tonic-gate 22497c478bd9Sstevel@tonic-gate if (arg & MCL_FUTURE) { 22507c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 22517c478bd9Sstevel@tonic-gate AS_SETPGLCK(as); 22527c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 22537c478bd9Sstevel@tonic-gate } 22547c478bd9Sstevel@tonic-gate if ((arg & MCL_CURRENT) == 0) { 2255dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 22567c478bd9Sstevel@tonic-gate return (0); 22577c478bd9Sstevel@tonic-gate } 22587c478bd9Sstevel@tonic-gate 22597c478bd9Sstevel@tonic-gate seg = AS_SEGFIRST(as); 22607c478bd9Sstevel@tonic-gate if (seg == NULL) { 2261dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 22627c478bd9Sstevel@tonic-gate return (0); 22637c478bd9Sstevel@tonic-gate } 22647c478bd9Sstevel@tonic-gate 22657c478bd9Sstevel@tonic-gate do { 22667c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)seg->s_base & 22677c478bd9Sstevel@tonic-gate (uintptr_t)PAGEMASK); 22687c478bd9Sstevel@tonic-gate rlen += (((uintptr_t)(seg->s_base + seg->s_size) + 2269843e1988Sjohnlev PAGEOFFSET) & PAGEMASK) - (uintptr_t)raddr; 22707c478bd9Sstevel@tonic-gate } while ((seg = AS_SEGNEXT(as, seg)) != NULL); 22717c478bd9Sstevel@tonic-gate 22727c478bd9Sstevel@tonic-gate mlock_size = BT_BITOUL(btopr(rlen)); 22737c478bd9Sstevel@tonic-gate if ((mlock_map = (ulong_t *)kmem_zalloc(mlock_size * 2274843e1988Sjohnlev sizeof (ulong_t), KM_NOSLEEP)) == NULL) { 2275dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 22767c478bd9Sstevel@tonic-gate return (EAGAIN); 22777c478bd9Sstevel@tonic-gate } 22787c478bd9Sstevel@tonic-gate 22797c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg; seg = AS_SEGNEXT(as, seg)) { 22807c478bd9Sstevel@tonic-gate error = SEGOP_LOCKOP(seg, seg->s_base, 22817c478bd9Sstevel@tonic-gate seg->s_size, attr, MC_LOCK, mlock_map, pos); 22827c478bd9Sstevel@tonic-gate if (error != 0) 22837c478bd9Sstevel@tonic-gate break; 22847c478bd9Sstevel@tonic-gate pos += seg_pages(seg); 22857c478bd9Sstevel@tonic-gate } 22867c478bd9Sstevel@tonic-gate 22877c478bd9Sstevel@tonic-gate if (error) { 22887c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg != NULL; 2289843e1988Sjohnlev seg = AS_SEGNEXT(as, seg)) { 22907c478bd9Sstevel@tonic-gate 22917c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)seg->s_base & 2292843e1988Sjohnlev (uintptr_t)PAGEMASK); 22937c478bd9Sstevel@tonic-gate npages = seg_pages(seg); 22947c478bd9Sstevel@tonic-gate as_segunlock(seg, raddr, attr, mlock_map, 2295843e1988Sjohnlev idx, npages); 22967c478bd9Sstevel@tonic-gate idx += npages; 22977c478bd9Sstevel@tonic-gate } 22987c478bd9Sstevel@tonic-gate } 22997c478bd9Sstevel@tonic-gate 23007c478bd9Sstevel@tonic-gate kmem_free(mlock_map, mlock_size * sizeof (ulong_t)); 2301dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23027c478bd9Sstevel@tonic-gate goto lockerr; 23037c478bd9Sstevel@tonic-gate } else if (func == MC_UNLOCKAS) { 23047c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 23057c478bd9Sstevel@tonic-gate AS_CLRPGLCK(as); 23067c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 23077c478bd9Sstevel@tonic-gate 23087c478bd9Sstevel@tonic-gate for (seg = AS_SEGFIRST(as); seg; seg = AS_SEGNEXT(as, seg)) { 23097c478bd9Sstevel@tonic-gate error = SEGOP_LOCKOP(seg, seg->s_base, 23107c478bd9Sstevel@tonic-gate seg->s_size, attr, MC_UNLOCK, NULL, 0); 23117c478bd9Sstevel@tonic-gate if (error != 0) 23127c478bd9Sstevel@tonic-gate break; 23137c478bd9Sstevel@tonic-gate } 23147c478bd9Sstevel@tonic-gate 2315dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23167c478bd9Sstevel@tonic-gate goto lockerr; 23177c478bd9Sstevel@tonic-gate } 23187c478bd9Sstevel@tonic-gate 23197c478bd9Sstevel@tonic-gate /* 23207c478bd9Sstevel@tonic-gate * Normalize addresses and sizes. 23217c478bd9Sstevel@tonic-gate */ 23227c478bd9Sstevel@tonic-gate initraddr = raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 23237c478bd9Sstevel@tonic-gate initrsize = rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 2324843e1988Sjohnlev (size_t)raddr; 23257c478bd9Sstevel@tonic-gate 23267c478bd9Sstevel@tonic-gate if (raddr + rsize < raddr) { /* check for wraparound */ 2327dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23287c478bd9Sstevel@tonic-gate return (ENOMEM); 23297c478bd9Sstevel@tonic-gate } 23307c478bd9Sstevel@tonic-gate 23317c478bd9Sstevel@tonic-gate /* 23327c478bd9Sstevel@tonic-gate * Get initial segment. 23337c478bd9Sstevel@tonic-gate */ 23347c478bd9Sstevel@tonic-gate if ((seg = as_segat(as, raddr)) == NULL) { 2335dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23367c478bd9Sstevel@tonic-gate return (ENOMEM); 23377c478bd9Sstevel@tonic-gate } 23387c478bd9Sstevel@tonic-gate 23397c478bd9Sstevel@tonic-gate if (func == MC_LOCK) { 23407c478bd9Sstevel@tonic-gate mlock_size = BT_BITOUL(btopr(rsize)); 23417c478bd9Sstevel@tonic-gate if ((mlock_map = (ulong_t *)kmem_zalloc(mlock_size * 2342843e1988Sjohnlev sizeof (ulong_t), KM_NOSLEEP)) == NULL) { 2343dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23447c478bd9Sstevel@tonic-gate return (EAGAIN); 23457c478bd9Sstevel@tonic-gate } 23467c478bd9Sstevel@tonic-gate } 23477c478bd9Sstevel@tonic-gate 23487c478bd9Sstevel@tonic-gate /* 23497c478bd9Sstevel@tonic-gate * Loop over all segments. If a hole in the address range is 23507c478bd9Sstevel@tonic-gate * discovered, then fail. For each segment, perform the appropriate 23517c478bd9Sstevel@tonic-gate * control operation. 23527c478bd9Sstevel@tonic-gate */ 23537c478bd9Sstevel@tonic-gate while (rsize != 0) { 23547c478bd9Sstevel@tonic-gate 23557c478bd9Sstevel@tonic-gate /* 23567c478bd9Sstevel@tonic-gate * Make sure there's no hole, calculate the portion 23577c478bd9Sstevel@tonic-gate * of the next segment to be operated over. 23587c478bd9Sstevel@tonic-gate */ 23597c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 23607c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 23617c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 23627c478bd9Sstevel@tonic-gate if (func == MC_LOCK) { 23637c478bd9Sstevel@tonic-gate as_unlockerr(as, attr, mlock_map, 2364843e1988Sjohnlev initraddr, initrsize - rsize); 23657c478bd9Sstevel@tonic-gate kmem_free(mlock_map, 2366843e1988Sjohnlev mlock_size * sizeof (ulong_t)); 23677c478bd9Sstevel@tonic-gate } 2368dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23697c478bd9Sstevel@tonic-gate return (ENOMEM); 23707c478bd9Sstevel@tonic-gate } 23717c478bd9Sstevel@tonic-gate } 23727c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) 23737c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 23747c478bd9Sstevel@tonic-gate else 23757c478bd9Sstevel@tonic-gate ssize = rsize; 23767c478bd9Sstevel@tonic-gate 23777c478bd9Sstevel@tonic-gate /* 23787c478bd9Sstevel@tonic-gate * Dispatch on specific function. 23797c478bd9Sstevel@tonic-gate */ 23807c478bd9Sstevel@tonic-gate switch (func) { 23817c478bd9Sstevel@tonic-gate 23827c478bd9Sstevel@tonic-gate /* 23837c478bd9Sstevel@tonic-gate * Synchronize cached data from mappings with backing 23847c478bd9Sstevel@tonic-gate * objects. 23857c478bd9Sstevel@tonic-gate */ 23867c478bd9Sstevel@tonic-gate case MC_SYNC: 23877c478bd9Sstevel@tonic-gate if (error = SEGOP_SYNC(seg, raddr, ssize, 23887c478bd9Sstevel@tonic-gate attr, (uint_t)arg)) { 2389dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 23907c478bd9Sstevel@tonic-gate return (error); 23917c478bd9Sstevel@tonic-gate } 23927c478bd9Sstevel@tonic-gate break; 23937c478bd9Sstevel@tonic-gate 23947c478bd9Sstevel@tonic-gate /* 23957c478bd9Sstevel@tonic-gate * Lock pages in memory. 23967c478bd9Sstevel@tonic-gate */ 23977c478bd9Sstevel@tonic-gate case MC_LOCK: 23987c478bd9Sstevel@tonic-gate if (error = SEGOP_LOCKOP(seg, raddr, ssize, 2399843e1988Sjohnlev attr, func, mlock_map, pos)) { 24007c478bd9Sstevel@tonic-gate as_unlockerr(as, attr, mlock_map, initraddr, 2401843e1988Sjohnlev initrsize - rsize + ssize); 24027c478bd9Sstevel@tonic-gate kmem_free(mlock_map, mlock_size * 2403843e1988Sjohnlev sizeof (ulong_t)); 2404dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24057c478bd9Sstevel@tonic-gate goto lockerr; 24067c478bd9Sstevel@tonic-gate } 24077c478bd9Sstevel@tonic-gate break; 24087c478bd9Sstevel@tonic-gate 24097c478bd9Sstevel@tonic-gate /* 24107c478bd9Sstevel@tonic-gate * Unlock mapped pages. 24117c478bd9Sstevel@tonic-gate */ 24127c478bd9Sstevel@tonic-gate case MC_UNLOCK: 24137c478bd9Sstevel@tonic-gate (void) SEGOP_LOCKOP(seg, raddr, ssize, attr, func, 2414843e1988Sjohnlev (ulong_t *)NULL, (size_t)NULL); 24157c478bd9Sstevel@tonic-gate break; 24167c478bd9Sstevel@tonic-gate 24177c478bd9Sstevel@tonic-gate /* 24187c478bd9Sstevel@tonic-gate * Store VM advise for mapped pages in segment layer. 24197c478bd9Sstevel@tonic-gate */ 24207c478bd9Sstevel@tonic-gate case MC_ADVISE: 24217c478bd9Sstevel@tonic-gate error = SEGOP_ADVISE(seg, raddr, ssize, (uint_t)arg); 24227c478bd9Sstevel@tonic-gate 24237c478bd9Sstevel@tonic-gate /* 24247c478bd9Sstevel@tonic-gate * Check for regular errors and special retry error 24257c478bd9Sstevel@tonic-gate */ 24267c478bd9Sstevel@tonic-gate if (error) { 24277c478bd9Sstevel@tonic-gate if (error == IE_RETRY) { 24287c478bd9Sstevel@tonic-gate /* 24297c478bd9Sstevel@tonic-gate * Need to acquire writers lock, so 24307c478bd9Sstevel@tonic-gate * have to drop readers lock and start 24317c478bd9Sstevel@tonic-gate * all over again 24327c478bd9Sstevel@tonic-gate */ 2433dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24347c478bd9Sstevel@tonic-gate goto retry; 24357c478bd9Sstevel@tonic-gate } else if (error == IE_REATTACH) { 24367c478bd9Sstevel@tonic-gate /* 24377c478bd9Sstevel@tonic-gate * Find segment for current address 24387c478bd9Sstevel@tonic-gate * because current segment just got 24397c478bd9Sstevel@tonic-gate * split or concatenated 24407c478bd9Sstevel@tonic-gate */ 24417c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 24427c478bd9Sstevel@tonic-gate if (seg == NULL) { 2443dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24447c478bd9Sstevel@tonic-gate return (ENOMEM); 24457c478bd9Sstevel@tonic-gate } 24467c478bd9Sstevel@tonic-gate } else { 24477c478bd9Sstevel@tonic-gate /* 24487c478bd9Sstevel@tonic-gate * Regular error 24497c478bd9Sstevel@tonic-gate */ 2450dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24517c478bd9Sstevel@tonic-gate return (error); 24527c478bd9Sstevel@tonic-gate } 24537c478bd9Sstevel@tonic-gate } 24547c478bd9Sstevel@tonic-gate break; 24557c478bd9Sstevel@tonic-gate 24569d12795fSRobert Mustacchi case MC_INHERIT_ZERO: 24579d12795fSRobert Mustacchi if (seg->s_ops->inherit == NULL) { 24589d12795fSRobert Mustacchi error = ENOTSUP; 24599d12795fSRobert Mustacchi } else { 24609d12795fSRobert Mustacchi error = SEGOP_INHERIT(seg, raddr, ssize, 24619d12795fSRobert Mustacchi SEGP_INH_ZERO); 24629d12795fSRobert Mustacchi } 24639d12795fSRobert Mustacchi if (error != 0) { 2464dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24659d12795fSRobert Mustacchi return (error); 24669d12795fSRobert Mustacchi } 24679d12795fSRobert Mustacchi break; 24689d12795fSRobert Mustacchi 24697c478bd9Sstevel@tonic-gate /* 24707c478bd9Sstevel@tonic-gate * Can't happen. 24717c478bd9Sstevel@tonic-gate */ 24727c478bd9Sstevel@tonic-gate default: 24737c478bd9Sstevel@tonic-gate panic("as_ctl: bad operation %d", func); 24747c478bd9Sstevel@tonic-gate /*NOTREACHED*/ 24757c478bd9Sstevel@tonic-gate } 24767c478bd9Sstevel@tonic-gate 24777c478bd9Sstevel@tonic-gate rsize -= ssize; 24787c478bd9Sstevel@tonic-gate raddr += ssize; 24797c478bd9Sstevel@tonic-gate } 24807c478bd9Sstevel@tonic-gate 24817c478bd9Sstevel@tonic-gate if (func == MC_LOCK) 24827c478bd9Sstevel@tonic-gate kmem_free(mlock_map, mlock_size * sizeof (ulong_t)); 2483dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 24847c478bd9Sstevel@tonic-gate return (0); 24857c478bd9Sstevel@tonic-gate lockerr: 24867c478bd9Sstevel@tonic-gate 24877c478bd9Sstevel@tonic-gate /* 24887c478bd9Sstevel@tonic-gate * If the lower levels returned EDEADLK for a segment lockop, 24897c478bd9Sstevel@tonic-gate * it means that we should retry the operation. Let's wait 24907c478bd9Sstevel@tonic-gate * a bit also to let the deadlock causing condition clear. 24917c478bd9Sstevel@tonic-gate * This is part of a gross hack to work around a design flaw 24927c478bd9Sstevel@tonic-gate * in the ufs/sds logging code and should go away when the 24937c478bd9Sstevel@tonic-gate * logging code is re-designed to fix the problem. See bug 24947c478bd9Sstevel@tonic-gate * 4125102 for details of the problem. 24957c478bd9Sstevel@tonic-gate */ 24967c478bd9Sstevel@tonic-gate if (error == EDEADLK) { 24977c478bd9Sstevel@tonic-gate delay(deadlk_wait); 24987c478bd9Sstevel@tonic-gate error = 0; 24997c478bd9Sstevel@tonic-gate goto retry; 25007c478bd9Sstevel@tonic-gate } 25017c478bd9Sstevel@tonic-gate return (error); 25027c478bd9Sstevel@tonic-gate } 25037c478bd9Sstevel@tonic-gate 2504843e1988Sjohnlev int 2505843e1988Sjohnlev fc_decode(faultcode_t fault_err) 25067c478bd9Sstevel@tonic-gate { 25077c478bd9Sstevel@tonic-gate int error = 0; 25087c478bd9Sstevel@tonic-gate 25097c478bd9Sstevel@tonic-gate switch (FC_CODE(fault_err)) { 25107c478bd9Sstevel@tonic-gate case FC_OBJERR: 25117c478bd9Sstevel@tonic-gate error = FC_ERRNO(fault_err); 25127c478bd9Sstevel@tonic-gate break; 25137c478bd9Sstevel@tonic-gate case FC_PROT: 25147c478bd9Sstevel@tonic-gate error = EACCES; 25157c478bd9Sstevel@tonic-gate break; 25167c478bd9Sstevel@tonic-gate default: 25177c478bd9Sstevel@tonic-gate error = EFAULT; 25187c478bd9Sstevel@tonic-gate break; 25197c478bd9Sstevel@tonic-gate } 25207c478bd9Sstevel@tonic-gate return (error); 25217c478bd9Sstevel@tonic-gate } 25227c478bd9Sstevel@tonic-gate 2523a98e9dbfSaguzovsk /* 2524a98e9dbfSaguzovsk * Pagelock pages from a range that spans more than 1 segment. Obtain shadow 2525a98e9dbfSaguzovsk * lists from each segment and copy them to one contiguous shadow list (plist) 2526a98e9dbfSaguzovsk * as expected by the caller. Save pointers to per segment shadow lists at 2527a98e9dbfSaguzovsk * the tail of plist so that they can be used during as_pageunlock(). 2528a98e9dbfSaguzovsk */ 2529a98e9dbfSaguzovsk static int 2530a98e9dbfSaguzovsk as_pagelock_segs(struct as *as, struct seg *seg, struct page ***ppp, 2531a98e9dbfSaguzovsk caddr_t addr, size_t size, enum seg_rw rw) 2532a98e9dbfSaguzovsk { 2533a98e9dbfSaguzovsk caddr_t sv_addr = addr; 2534a98e9dbfSaguzovsk size_t sv_size = size; 2535a98e9dbfSaguzovsk struct seg *sv_seg = seg; 2536a98e9dbfSaguzovsk ulong_t segcnt = 1; 2537a98e9dbfSaguzovsk ulong_t cnt; 2538a98e9dbfSaguzovsk size_t ssize; 2539a98e9dbfSaguzovsk pgcnt_t npages = btop(size); 2540a98e9dbfSaguzovsk page_t **plist; 2541a98e9dbfSaguzovsk page_t **pl; 2542a98e9dbfSaguzovsk int error; 2543a98e9dbfSaguzovsk caddr_t eaddr; 2544a98e9dbfSaguzovsk faultcode_t fault_err = 0; 2545a98e9dbfSaguzovsk pgcnt_t pl_off; 2546a98e9dbfSaguzovsk extern struct seg_ops segspt_shmops; 2547a98e9dbfSaguzovsk 2548dc32d872SJosef 'Jeff' Sipek ASSERT(AS_LOCK_HELD(as)); 2549a98e9dbfSaguzovsk ASSERT(seg != NULL); 2550a98e9dbfSaguzovsk ASSERT(addr >= seg->s_base && addr < seg->s_base + seg->s_size); 2551a98e9dbfSaguzovsk ASSERT(addr + size > seg->s_base + seg->s_size); 2552a98e9dbfSaguzovsk ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 2553a98e9dbfSaguzovsk ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 2554a98e9dbfSaguzovsk 2555a98e9dbfSaguzovsk /* 2556a98e9dbfSaguzovsk * Count the number of segments covered by the range we are about to 2557a98e9dbfSaguzovsk * lock. The segment count is used to size the shadow list we return 2558a98e9dbfSaguzovsk * back to the caller. 2559a98e9dbfSaguzovsk */ 2560a98e9dbfSaguzovsk for (; size != 0; size -= ssize, addr += ssize) { 2561a98e9dbfSaguzovsk if (addr >= seg->s_base + seg->s_size) { 2562a98e9dbfSaguzovsk 2563a98e9dbfSaguzovsk seg = AS_SEGNEXT(as, seg); 2564a98e9dbfSaguzovsk if (seg == NULL || addr != seg->s_base) { 2565dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2566a98e9dbfSaguzovsk return (EFAULT); 2567a98e9dbfSaguzovsk } 2568a98e9dbfSaguzovsk /* 2569a98e9dbfSaguzovsk * Do a quick check if subsequent segments 2570a98e9dbfSaguzovsk * will most likely support pagelock. 2571a98e9dbfSaguzovsk */ 2572a98e9dbfSaguzovsk if (seg->s_ops == &segvn_ops) { 2573a98e9dbfSaguzovsk vnode_t *vp; 2574a98e9dbfSaguzovsk 2575a98e9dbfSaguzovsk if (SEGOP_GETVP(seg, addr, &vp) != 0 || 2576a98e9dbfSaguzovsk vp != NULL) { 2577dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2578a98e9dbfSaguzovsk goto slow; 2579a98e9dbfSaguzovsk } 2580a98e9dbfSaguzovsk } else if (seg->s_ops != &segspt_shmops) { 2581dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2582a98e9dbfSaguzovsk goto slow; 2583a98e9dbfSaguzovsk } 2584a98e9dbfSaguzovsk segcnt++; 2585a98e9dbfSaguzovsk } 2586a98e9dbfSaguzovsk if (addr + size > seg->s_base + seg->s_size) { 2587a98e9dbfSaguzovsk ssize = seg->s_base + seg->s_size - addr; 2588a98e9dbfSaguzovsk } else { 2589a98e9dbfSaguzovsk ssize = size; 2590a98e9dbfSaguzovsk } 2591a98e9dbfSaguzovsk } 2592a98e9dbfSaguzovsk ASSERT(segcnt > 1); 2593a98e9dbfSaguzovsk 2594a98e9dbfSaguzovsk plist = kmem_zalloc((npages + segcnt) * sizeof (page_t *), KM_SLEEP); 2595a98e9dbfSaguzovsk 2596a98e9dbfSaguzovsk addr = sv_addr; 2597a98e9dbfSaguzovsk size = sv_size; 2598a98e9dbfSaguzovsk seg = sv_seg; 2599a98e9dbfSaguzovsk 2600a98e9dbfSaguzovsk for (cnt = 0, pl_off = 0; size != 0; size -= ssize, addr += ssize) { 2601a98e9dbfSaguzovsk if (addr >= seg->s_base + seg->s_size) { 2602a98e9dbfSaguzovsk seg = AS_SEGNEXT(as, seg); 2603a98e9dbfSaguzovsk ASSERT(seg != NULL && addr == seg->s_base); 2604a98e9dbfSaguzovsk cnt++; 2605a98e9dbfSaguzovsk ASSERT(cnt < segcnt); 2606a98e9dbfSaguzovsk } 2607a98e9dbfSaguzovsk if (addr + size > seg->s_base + seg->s_size) { 2608a98e9dbfSaguzovsk ssize = seg->s_base + seg->s_size - addr; 2609a98e9dbfSaguzovsk } else { 2610a98e9dbfSaguzovsk ssize = size; 2611a98e9dbfSaguzovsk } 2612a98e9dbfSaguzovsk pl = &plist[npages + cnt]; 2613a98e9dbfSaguzovsk error = SEGOP_PAGELOCK(seg, addr, ssize, (page_t ***)pl, 2614a98e9dbfSaguzovsk L_PAGELOCK, rw); 2615a98e9dbfSaguzovsk if (error) { 2616a98e9dbfSaguzovsk break; 2617a98e9dbfSaguzovsk } 2618a98e9dbfSaguzovsk ASSERT(plist[npages + cnt] != NULL); 2619a98e9dbfSaguzovsk ASSERT(pl_off + btop(ssize) <= npages); 2620a98e9dbfSaguzovsk bcopy(plist[npages + cnt], &plist[pl_off], 2621a98e9dbfSaguzovsk btop(ssize) * sizeof (page_t *)); 2622a98e9dbfSaguzovsk pl_off += btop(ssize); 2623a98e9dbfSaguzovsk } 2624a98e9dbfSaguzovsk 2625a98e9dbfSaguzovsk if (size == 0) { 2626dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2627a98e9dbfSaguzovsk ASSERT(cnt == segcnt - 1); 2628a98e9dbfSaguzovsk *ppp = plist; 2629a98e9dbfSaguzovsk return (0); 2630a98e9dbfSaguzovsk } 2631a98e9dbfSaguzovsk 2632a98e9dbfSaguzovsk /* 2633a98e9dbfSaguzovsk * one of pagelock calls failed. The error type is in error variable. 2634a98e9dbfSaguzovsk * Unlock what we've locked so far and retry with F_SOFTLOCK if error 2635a98e9dbfSaguzovsk * type is either EFAULT or ENOTSUP. Otherwise just return the error 2636a98e9dbfSaguzovsk * back to the caller. 2637a98e9dbfSaguzovsk */ 2638a98e9dbfSaguzovsk 2639a98e9dbfSaguzovsk eaddr = addr; 2640a98e9dbfSaguzovsk seg = sv_seg; 2641a98e9dbfSaguzovsk 2642a98e9dbfSaguzovsk for (cnt = 0, addr = sv_addr; addr < eaddr; addr += ssize) { 2643a98e9dbfSaguzovsk if (addr >= seg->s_base + seg->s_size) { 2644a98e9dbfSaguzovsk seg = AS_SEGNEXT(as, seg); 2645a98e9dbfSaguzovsk ASSERT(seg != NULL && addr == seg->s_base); 2646a98e9dbfSaguzovsk cnt++; 2647a98e9dbfSaguzovsk ASSERT(cnt < segcnt); 2648a98e9dbfSaguzovsk } 2649a98e9dbfSaguzovsk if (eaddr > seg->s_base + seg->s_size) { 2650a98e9dbfSaguzovsk ssize = seg->s_base + seg->s_size - addr; 2651a98e9dbfSaguzovsk } else { 2652a98e9dbfSaguzovsk ssize = eaddr - addr; 2653a98e9dbfSaguzovsk } 2654a98e9dbfSaguzovsk pl = &plist[npages + cnt]; 2655a98e9dbfSaguzovsk ASSERT(*pl != NULL); 2656a98e9dbfSaguzovsk (void) SEGOP_PAGELOCK(seg, addr, ssize, (page_t ***)pl, 2657a98e9dbfSaguzovsk L_PAGEUNLOCK, rw); 2658a98e9dbfSaguzovsk } 2659a98e9dbfSaguzovsk 2660dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2661a98e9dbfSaguzovsk 2662a98e9dbfSaguzovsk kmem_free(plist, (npages + segcnt) * sizeof (page_t *)); 2663a98e9dbfSaguzovsk 2664a98e9dbfSaguzovsk if (error != ENOTSUP && error != EFAULT) { 2665a98e9dbfSaguzovsk return (error); 2666a98e9dbfSaguzovsk } 2667a98e9dbfSaguzovsk 2668a98e9dbfSaguzovsk slow: 2669a98e9dbfSaguzovsk /* 2670a98e9dbfSaguzovsk * If we are here because pagelock failed due to the need to cow fault 2671a98e9dbfSaguzovsk * in the pages we want to lock F_SOFTLOCK will do this job and in 2672a98e9dbfSaguzovsk * next as_pagelock() call for this address range pagelock will 2673a98e9dbfSaguzovsk * hopefully succeed. 2674a98e9dbfSaguzovsk */ 2675a98e9dbfSaguzovsk fault_err = as_fault(as->a_hat, as, sv_addr, sv_size, F_SOFTLOCK, rw); 2676a98e9dbfSaguzovsk if (fault_err != 0) { 2677a98e9dbfSaguzovsk return (fc_decode(fault_err)); 2678a98e9dbfSaguzovsk } 2679a98e9dbfSaguzovsk *ppp = NULL; 2680a98e9dbfSaguzovsk 2681a98e9dbfSaguzovsk return (0); 2682a98e9dbfSaguzovsk } 2683a98e9dbfSaguzovsk 26847c478bd9Sstevel@tonic-gate /* 26857c478bd9Sstevel@tonic-gate * lock pages in a given address space. Return shadow list. If 26867c478bd9Sstevel@tonic-gate * the list is NULL, the MMU mapping is also locked. 26877c478bd9Sstevel@tonic-gate */ 26887c478bd9Sstevel@tonic-gate int 26897c478bd9Sstevel@tonic-gate as_pagelock(struct as *as, struct page ***ppp, caddr_t addr, 26907c478bd9Sstevel@tonic-gate size_t size, enum seg_rw rw) 26917c478bd9Sstevel@tonic-gate { 26927c478bd9Sstevel@tonic-gate size_t rsize; 26937c478bd9Sstevel@tonic-gate caddr_t raddr; 26947c478bd9Sstevel@tonic-gate faultcode_t fault_err; 26957c478bd9Sstevel@tonic-gate struct seg *seg; 2696a98e9dbfSaguzovsk int err; 26977c478bd9Sstevel@tonic-gate 26987c478bd9Sstevel@tonic-gate TRACE_2(TR_FAC_PHYSIO, TR_PHYSIO_AS_LOCK_START, 26997c478bd9Sstevel@tonic-gate "as_pagelock_start: addr %p size %ld", addr, size); 27007c478bd9Sstevel@tonic-gate 27017c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 27027c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 2703843e1988Sjohnlev (size_t)raddr; 2704a98e9dbfSaguzovsk 27057c478bd9Sstevel@tonic-gate /* 27067c478bd9Sstevel@tonic-gate * if the request crosses two segments let 27077c478bd9Sstevel@tonic-gate * as_fault handle it. 27087c478bd9Sstevel@tonic-gate */ 2709dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 2710a98e9dbfSaguzovsk 2711a98e9dbfSaguzovsk seg = as_segat(as, raddr); 2712a98e9dbfSaguzovsk if (seg == NULL) { 2713dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2714a98e9dbfSaguzovsk return (EFAULT); 2715a98e9dbfSaguzovsk } 2716a98e9dbfSaguzovsk ASSERT(raddr >= seg->s_base && raddr < seg->s_base + seg->s_size); 2717a98e9dbfSaguzovsk if (raddr + rsize > seg->s_base + seg->s_size) { 2718a98e9dbfSaguzovsk return (as_pagelock_segs(as, seg, ppp, raddr, rsize, rw)); 2719a98e9dbfSaguzovsk } 2720a98e9dbfSaguzovsk if (raddr + rsize <= raddr) { 2721dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2722a98e9dbfSaguzovsk return (EFAULT); 27237c478bd9Sstevel@tonic-gate } 27247c478bd9Sstevel@tonic-gate 27257c478bd9Sstevel@tonic-gate TRACE_2(TR_FAC_PHYSIO, TR_PHYSIO_SEG_LOCK_START, 27267c478bd9Sstevel@tonic-gate "seg_lock_1_start: raddr %p rsize %ld", raddr, rsize); 27277c478bd9Sstevel@tonic-gate 27287c478bd9Sstevel@tonic-gate /* 27297c478bd9Sstevel@tonic-gate * try to lock pages and pass back shadow list 27307c478bd9Sstevel@tonic-gate */ 2731a98e9dbfSaguzovsk err = SEGOP_PAGELOCK(seg, raddr, rsize, ppp, L_PAGELOCK, rw); 27327c478bd9Sstevel@tonic-gate 27337c478bd9Sstevel@tonic-gate TRACE_0(TR_FAC_PHYSIO, TR_PHYSIO_SEG_LOCK_END, "seg_lock_1_end"); 27347c478bd9Sstevel@tonic-gate 2735dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 27367c478bd9Sstevel@tonic-gate 2737a98e9dbfSaguzovsk if (err == 0 || (err != ENOTSUP && err != EFAULT)) { 2738a98e9dbfSaguzovsk return (err); 27397c478bd9Sstevel@tonic-gate } 27407c478bd9Sstevel@tonic-gate 27417c478bd9Sstevel@tonic-gate /* 2742a98e9dbfSaguzovsk * Use F_SOFTLOCK to lock the pages because pagelock failed either due 2743a98e9dbfSaguzovsk * to no pagelock support for this segment or pages need to be cow 2744a98e9dbfSaguzovsk * faulted in. If fault is needed F_SOFTLOCK will do this job for 2745a98e9dbfSaguzovsk * this as_pagelock() call and in the next as_pagelock() call for the 2746a98e9dbfSaguzovsk * same address range pagelock call will hopefull succeed. 27477c478bd9Sstevel@tonic-gate */ 27487c478bd9Sstevel@tonic-gate fault_err = as_fault(as->a_hat, as, addr, size, F_SOFTLOCK, rw); 27497c478bd9Sstevel@tonic-gate if (fault_err != 0) { 2750843e1988Sjohnlev return (fc_decode(fault_err)); 27517c478bd9Sstevel@tonic-gate } 27527c478bd9Sstevel@tonic-gate *ppp = NULL; 27537c478bd9Sstevel@tonic-gate 27547c478bd9Sstevel@tonic-gate TRACE_0(TR_FAC_PHYSIO, TR_PHYSIO_AS_LOCK_END, "as_pagelock_end"); 27557c478bd9Sstevel@tonic-gate return (0); 27567c478bd9Sstevel@tonic-gate } 27577c478bd9Sstevel@tonic-gate 2758a98e9dbfSaguzovsk /* 2759a98e9dbfSaguzovsk * unlock pages locked by as_pagelock_segs(). Retrieve per segment shadow 2760a98e9dbfSaguzovsk * lists from the end of plist and call pageunlock interface for each segment. 2761a98e9dbfSaguzovsk * Drop as lock and free plist. 2762a98e9dbfSaguzovsk */ 2763a98e9dbfSaguzovsk static void 2764a98e9dbfSaguzovsk as_pageunlock_segs(struct as *as, struct seg *seg, caddr_t addr, size_t size, 2765a98e9dbfSaguzovsk struct page **plist, enum seg_rw rw) 2766a98e9dbfSaguzovsk { 2767a98e9dbfSaguzovsk ulong_t cnt; 2768a98e9dbfSaguzovsk caddr_t eaddr = addr + size; 2769a98e9dbfSaguzovsk pgcnt_t npages = btop(size); 2770a98e9dbfSaguzovsk size_t ssize; 2771a98e9dbfSaguzovsk page_t **pl; 2772a98e9dbfSaguzovsk 2773dc32d872SJosef 'Jeff' Sipek ASSERT(AS_LOCK_HELD(as)); 2774a98e9dbfSaguzovsk ASSERT(seg != NULL); 2775a98e9dbfSaguzovsk ASSERT(addr >= seg->s_base && addr < seg->s_base + seg->s_size); 2776a98e9dbfSaguzovsk ASSERT(addr + size > seg->s_base + seg->s_size); 2777a98e9dbfSaguzovsk ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 2778a98e9dbfSaguzovsk ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 2779a98e9dbfSaguzovsk ASSERT(plist != NULL); 2780a98e9dbfSaguzovsk 2781a98e9dbfSaguzovsk for (cnt = 0; addr < eaddr; addr += ssize) { 2782a98e9dbfSaguzovsk if (addr >= seg->s_base + seg->s_size) { 2783a98e9dbfSaguzovsk seg = AS_SEGNEXT(as, seg); 2784a98e9dbfSaguzovsk ASSERT(seg != NULL && addr == seg->s_base); 2785a98e9dbfSaguzovsk cnt++; 2786a98e9dbfSaguzovsk } 2787a98e9dbfSaguzovsk if (eaddr > seg->s_base + seg->s_size) { 2788a98e9dbfSaguzovsk ssize = seg->s_base + seg->s_size - addr; 2789a98e9dbfSaguzovsk } else { 2790a98e9dbfSaguzovsk ssize = eaddr - addr; 2791a98e9dbfSaguzovsk } 2792a98e9dbfSaguzovsk pl = &plist[npages + cnt]; 2793a98e9dbfSaguzovsk ASSERT(*pl != NULL); 2794a98e9dbfSaguzovsk (void) SEGOP_PAGELOCK(seg, addr, ssize, (page_t ***)pl, 2795a98e9dbfSaguzovsk L_PAGEUNLOCK, rw); 2796a98e9dbfSaguzovsk } 2797a98e9dbfSaguzovsk ASSERT(cnt > 0); 2798dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2799a98e9dbfSaguzovsk 2800a98e9dbfSaguzovsk cnt++; 2801a98e9dbfSaguzovsk kmem_free(plist, (npages + cnt) * sizeof (page_t *)); 2802a98e9dbfSaguzovsk } 2803a98e9dbfSaguzovsk 28047c478bd9Sstevel@tonic-gate /* 28057c478bd9Sstevel@tonic-gate * unlock pages in a given address range 28067c478bd9Sstevel@tonic-gate */ 28077c478bd9Sstevel@tonic-gate void 28087c478bd9Sstevel@tonic-gate as_pageunlock(struct as *as, struct page **pp, caddr_t addr, size_t size, 28097c478bd9Sstevel@tonic-gate enum seg_rw rw) 28107c478bd9Sstevel@tonic-gate { 28117c478bd9Sstevel@tonic-gate struct seg *seg; 28127c478bd9Sstevel@tonic-gate size_t rsize; 28137c478bd9Sstevel@tonic-gate caddr_t raddr; 28147c478bd9Sstevel@tonic-gate 28157c478bd9Sstevel@tonic-gate TRACE_2(TR_FAC_PHYSIO, TR_PHYSIO_AS_UNLOCK_START, 28167c478bd9Sstevel@tonic-gate "as_pageunlock_start: addr %p size %ld", addr, size); 28177c478bd9Sstevel@tonic-gate 28187c478bd9Sstevel@tonic-gate /* 28197c478bd9Sstevel@tonic-gate * if the shadow list is NULL, as_pagelock was 28207c478bd9Sstevel@tonic-gate * falling back to as_fault 28217c478bd9Sstevel@tonic-gate */ 28227c478bd9Sstevel@tonic-gate if (pp == NULL) { 28237c478bd9Sstevel@tonic-gate (void) as_fault(as->a_hat, as, addr, size, F_SOFTUNLOCK, rw); 28247c478bd9Sstevel@tonic-gate return; 28257c478bd9Sstevel@tonic-gate } 2826a98e9dbfSaguzovsk 28277c478bd9Sstevel@tonic-gate raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 28287c478bd9Sstevel@tonic-gate rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 2829843e1988Sjohnlev (size_t)raddr; 2830a98e9dbfSaguzovsk 2831dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 2832a98e9dbfSaguzovsk seg = as_segat(as, raddr); 2833a98e9dbfSaguzovsk ASSERT(seg != NULL); 2834a98e9dbfSaguzovsk 28357c478bd9Sstevel@tonic-gate TRACE_2(TR_FAC_PHYSIO, TR_PHYSIO_SEG_UNLOCK_START, 28367c478bd9Sstevel@tonic-gate "seg_unlock_start: raddr %p rsize %ld", raddr, rsize); 2837a98e9dbfSaguzovsk 2838a98e9dbfSaguzovsk ASSERT(raddr >= seg->s_base && raddr < seg->s_base + seg->s_size); 2839a98e9dbfSaguzovsk if (raddr + rsize <= seg->s_base + seg->s_size) { 2840a98e9dbfSaguzovsk SEGOP_PAGELOCK(seg, raddr, rsize, &pp, L_PAGEUNLOCK, rw); 2841a98e9dbfSaguzovsk } else { 2842a98e9dbfSaguzovsk as_pageunlock_segs(as, seg, raddr, rsize, pp, rw); 2843a98e9dbfSaguzovsk return; 2844a98e9dbfSaguzovsk } 2845dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 28467c478bd9Sstevel@tonic-gate TRACE_0(TR_FAC_PHYSIO, TR_PHYSIO_AS_UNLOCK_END, "as_pageunlock_end"); 28477c478bd9Sstevel@tonic-gate } 28487c478bd9Sstevel@tonic-gate 28497c478bd9Sstevel@tonic-gate int 28507c478bd9Sstevel@tonic-gate as_setpagesize(struct as *as, caddr_t addr, size_t size, uint_t szc, 28517c478bd9Sstevel@tonic-gate boolean_t wait) 28527c478bd9Sstevel@tonic-gate { 28537c478bd9Sstevel@tonic-gate struct seg *seg; 28547c478bd9Sstevel@tonic-gate size_t ssize; 28557c478bd9Sstevel@tonic-gate caddr_t raddr; /* rounded down addr */ 28567c478bd9Sstevel@tonic-gate size_t rsize; /* rounded up size */ 28577c478bd9Sstevel@tonic-gate int error = 0; 28587c478bd9Sstevel@tonic-gate size_t pgsz = page_get_pagesize(szc); 28597c478bd9Sstevel@tonic-gate 28607c478bd9Sstevel@tonic-gate setpgsz_top: 28617c478bd9Sstevel@tonic-gate if (!IS_P2ALIGNED(addr, pgsz) || !IS_P2ALIGNED(size, pgsz)) { 28627c478bd9Sstevel@tonic-gate return (EINVAL); 28637c478bd9Sstevel@tonic-gate } 28647c478bd9Sstevel@tonic-gate 28657c478bd9Sstevel@tonic-gate raddr = addr; 28667c478bd9Sstevel@tonic-gate rsize = size; 28677c478bd9Sstevel@tonic-gate 28687c478bd9Sstevel@tonic-gate if (raddr + rsize < raddr) /* check for wraparound */ 28697c478bd9Sstevel@tonic-gate return (ENOMEM); 28707c478bd9Sstevel@tonic-gate 2871dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 28727c478bd9Sstevel@tonic-gate as_clearwatchprot(as, raddr, rsize); 28737c478bd9Sstevel@tonic-gate seg = as_segat(as, raddr); 28747c478bd9Sstevel@tonic-gate if (seg == NULL) { 28757c478bd9Sstevel@tonic-gate as_setwatch(as); 2876dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 28777c478bd9Sstevel@tonic-gate return (ENOMEM); 28787c478bd9Sstevel@tonic-gate } 28797c478bd9Sstevel@tonic-gate 28807c478bd9Sstevel@tonic-gate for (; rsize != 0; rsize -= ssize, raddr += ssize) { 28817c478bd9Sstevel@tonic-gate if (raddr >= seg->s_base + seg->s_size) { 28827c478bd9Sstevel@tonic-gate seg = AS_SEGNEXT(as, seg); 28837c478bd9Sstevel@tonic-gate if (seg == NULL || raddr != seg->s_base) { 28847c478bd9Sstevel@tonic-gate error = ENOMEM; 28857c478bd9Sstevel@tonic-gate break; 28867c478bd9Sstevel@tonic-gate } 28877c478bd9Sstevel@tonic-gate } 28887c478bd9Sstevel@tonic-gate if ((raddr + rsize) > (seg->s_base + seg->s_size)) { 28897c478bd9Sstevel@tonic-gate ssize = seg->s_base + seg->s_size - raddr; 28907c478bd9Sstevel@tonic-gate } else { 28917c478bd9Sstevel@tonic-gate ssize = rsize; 28927c478bd9Sstevel@tonic-gate } 28937c478bd9Sstevel@tonic-gate 2894a98e9dbfSaguzovsk retry: 28957c478bd9Sstevel@tonic-gate error = SEGOP_SETPAGESIZE(seg, raddr, ssize, szc); 28967c478bd9Sstevel@tonic-gate 28977c478bd9Sstevel@tonic-gate if (error == IE_NOMEM) { 28987c478bd9Sstevel@tonic-gate error = EAGAIN; 28997c478bd9Sstevel@tonic-gate break; 29007c478bd9Sstevel@tonic-gate } 29017c478bd9Sstevel@tonic-gate 29027c478bd9Sstevel@tonic-gate if (error == IE_RETRY) { 2903dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 29047c478bd9Sstevel@tonic-gate goto setpgsz_top; 29057c478bd9Sstevel@tonic-gate } 29067c478bd9Sstevel@tonic-gate 29077c478bd9Sstevel@tonic-gate if (error == ENOTSUP) { 29087c478bd9Sstevel@tonic-gate error = EINVAL; 29097c478bd9Sstevel@tonic-gate break; 29107c478bd9Sstevel@tonic-gate } 29117c478bd9Sstevel@tonic-gate 29127c478bd9Sstevel@tonic-gate if (wait && (error == EAGAIN)) { 29137c478bd9Sstevel@tonic-gate /* 29147c478bd9Sstevel@tonic-gate * Memory is currently locked. It must be unlocked 29157c478bd9Sstevel@tonic-gate * before this operation can succeed through a retry. 29167c478bd9Sstevel@tonic-gate * The possible reasons for locked memory and 29177c478bd9Sstevel@tonic-gate * corresponding strategies for unlocking are: 29187c478bd9Sstevel@tonic-gate * (1) Normal I/O 29197c478bd9Sstevel@tonic-gate * wait for a signal that the I/O operation 29207c478bd9Sstevel@tonic-gate * has completed and the memory is unlocked. 29217c478bd9Sstevel@tonic-gate * (2) Asynchronous I/O 29227c478bd9Sstevel@tonic-gate * The aio subsystem does not unlock pages when 29237c478bd9Sstevel@tonic-gate * the I/O is completed. Those pages are unlocked 29247c478bd9Sstevel@tonic-gate * when the application calls aiowait/aioerror. 29257c478bd9Sstevel@tonic-gate * So, to prevent blocking forever, cv_broadcast() 29267c478bd9Sstevel@tonic-gate * is done to wake up aio_cleanup_thread. 29277c478bd9Sstevel@tonic-gate * Subsequently, segvn_reclaim will be called, and 29287c478bd9Sstevel@tonic-gate * that will do AS_CLRUNMAPWAIT() and wake us up. 29297c478bd9Sstevel@tonic-gate * (3) Long term page locking: 29307c478bd9Sstevel@tonic-gate * This is not relevant for as_setpagesize() 29317c478bd9Sstevel@tonic-gate * because we cannot change the page size for 29327c478bd9Sstevel@tonic-gate * driver memory. The attempt to do so will 29337c478bd9Sstevel@tonic-gate * fail with a different error than EAGAIN so 29347c478bd9Sstevel@tonic-gate * there's no need to trigger as callbacks like 29357c478bd9Sstevel@tonic-gate * as_unmap, as_setprot or as_free would do. 29367c478bd9Sstevel@tonic-gate */ 29377c478bd9Sstevel@tonic-gate mutex_enter(&as->a_contents); 2938a98e9dbfSaguzovsk if (!AS_ISNOUNMAPWAIT(as)) { 2939a98e9dbfSaguzovsk if (AS_ISUNMAPWAIT(as) == 0) { 2940a98e9dbfSaguzovsk cv_broadcast(&as->a_cv); 2941a98e9dbfSaguzovsk } 2942a98e9dbfSaguzovsk AS_SETUNMAPWAIT(as); 2943dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 2944a98e9dbfSaguzovsk while (AS_ISUNMAPWAIT(as)) { 2945a98e9dbfSaguzovsk cv_wait(&as->a_cv, &as->a_contents); 2946a98e9dbfSaguzovsk } 2947a98e9dbfSaguzovsk } else { 2948a98e9dbfSaguzovsk /* 2949a98e9dbfSaguzovsk * We may have raced with 2950a98e9dbfSaguzovsk * segvn_reclaim()/segspt_reclaim(). In this 2951a98e9dbfSaguzovsk * case clean nounmapwait flag and retry since 2952a98e9dbfSaguzovsk * softlockcnt in this segment may be already 2953a98e9dbfSaguzovsk * 0. We don't drop as writer lock so our 2954a98e9dbfSaguzovsk * number of retries without sleeping should 2955a98e9dbfSaguzovsk * be very small. See segvn_reclaim() for 2956a98e9dbfSaguzovsk * more comments. 2957a98e9dbfSaguzovsk */ 2958a98e9dbfSaguzovsk AS_CLRNOUNMAPWAIT(as); 2959a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 2960a98e9dbfSaguzovsk goto retry; 29617c478bd9Sstevel@tonic-gate } 29627c478bd9Sstevel@tonic-gate mutex_exit(&as->a_contents); 29637c478bd9Sstevel@tonic-gate goto setpgsz_top; 29647c478bd9Sstevel@tonic-gate } else if (error != 0) { 29657c478bd9Sstevel@tonic-gate break; 29667c478bd9Sstevel@tonic-gate } 29677c478bd9Sstevel@tonic-gate } 29687c478bd9Sstevel@tonic-gate as_setwatch(as); 2969dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 29707c478bd9Sstevel@tonic-gate return (error); 29717c478bd9Sstevel@tonic-gate } 29727c478bd9Sstevel@tonic-gate 2973ec25b48fSsusans /* 2974ec25b48fSsusans * as_iset3_default_lpsize() just calls SEGOP_SETPAGESIZE() on all segments 2975ec25b48fSsusans * in its chunk where s_szc is less than the szc we want to set. 2976ec25b48fSsusans */ 2977ec25b48fSsusans static int 2978ec25b48fSsusans as_iset3_default_lpsize(struct as *as, caddr_t raddr, size_t rsize, uint_t szc, 2979ec25b48fSsusans int *retry) 2980ec25b48fSsusans { 2981ec25b48fSsusans struct seg *seg; 2982ec25b48fSsusans size_t ssize; 2983ec25b48fSsusans int error; 2984ec25b48fSsusans 2985dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 2986a98e9dbfSaguzovsk 2987ec25b48fSsusans seg = as_segat(as, raddr); 2988ec25b48fSsusans if (seg == NULL) { 2989ec25b48fSsusans panic("as_iset3_default_lpsize: no seg"); 2990ec25b48fSsusans } 2991ec25b48fSsusans 2992ec25b48fSsusans for (; rsize != 0; rsize -= ssize, raddr += ssize) { 2993ec25b48fSsusans if (raddr >= seg->s_base + seg->s_size) { 2994ec25b48fSsusans seg = AS_SEGNEXT(as, seg); 2995ec25b48fSsusans if (seg == NULL || raddr != seg->s_base) { 2996ec25b48fSsusans panic("as_iset3_default_lpsize: as changed"); 2997ec25b48fSsusans } 2998ec25b48fSsusans } 2999ec25b48fSsusans if ((raddr + rsize) > (seg->s_base + seg->s_size)) { 3000ec25b48fSsusans ssize = seg->s_base + seg->s_size - raddr; 3001ec25b48fSsusans } else { 3002ec25b48fSsusans ssize = rsize; 3003ec25b48fSsusans } 3004ec25b48fSsusans 3005ec25b48fSsusans if (szc > seg->s_szc) { 3006ec25b48fSsusans error = SEGOP_SETPAGESIZE(seg, raddr, ssize, szc); 3007ec25b48fSsusans /* Only retry on EINVAL segments that have no vnode. */ 3008ec25b48fSsusans if (error == EINVAL) { 3009ec25b48fSsusans vnode_t *vp = NULL; 3010ec25b48fSsusans if ((SEGOP_GETTYPE(seg, raddr) & MAP_SHARED) && 3011ec25b48fSsusans (SEGOP_GETVP(seg, raddr, &vp) != 0 || 3012ec25b48fSsusans vp == NULL)) { 3013ec25b48fSsusans *retry = 1; 3014ec25b48fSsusans } else { 3015ec25b48fSsusans *retry = 0; 3016ec25b48fSsusans } 3017ec25b48fSsusans } 3018ec25b48fSsusans if (error) { 3019ec25b48fSsusans return (error); 3020ec25b48fSsusans } 3021ec25b48fSsusans } 3022ec25b48fSsusans } 3023ec25b48fSsusans return (0); 3024ec25b48fSsusans } 3025ec25b48fSsusans 3026ec25b48fSsusans /* 3027ec25b48fSsusans * as_iset2_default_lpsize() calls as_iset3_default_lpsize() to set the 3028ec25b48fSsusans * pagesize on each segment in its range, but if any fails with EINVAL, 3029ec25b48fSsusans * then it reduces the pagesizes to the next size in the bitmap and 3030ec25b48fSsusans * retries as_iset3_default_lpsize(). The reason why the code retries 3031ec25b48fSsusans * smaller allowed sizes on EINVAL is because (a) the anon offset may not 3032ec25b48fSsusans * match the bigger sizes, and (b) it's hard to get this offset (to begin 3033ec25b48fSsusans * with) to pass to map_pgszcvec(). 3034ec25b48fSsusans */ 3035ec25b48fSsusans static int 3036ec25b48fSsusans as_iset2_default_lpsize(struct as *as, caddr_t addr, size_t size, uint_t szc, 3037ec25b48fSsusans uint_t szcvec) 3038ec25b48fSsusans { 3039ec25b48fSsusans int error; 3040ec25b48fSsusans int retry; 3041ec25b48fSsusans 3042dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 3043a98e9dbfSaguzovsk 3044ec25b48fSsusans for (;;) { 3045ec25b48fSsusans error = as_iset3_default_lpsize(as, addr, size, szc, &retry); 3046ec25b48fSsusans if (error == EINVAL && retry) { 3047ec25b48fSsusans szcvec &= ~(1 << szc); 3048ec25b48fSsusans if (szcvec <= 1) { 3049ec25b48fSsusans return (EINVAL); 3050ec25b48fSsusans } 3051ec25b48fSsusans szc = highbit(szcvec) - 1; 3052ec25b48fSsusans } else { 3053ec25b48fSsusans return (error); 3054ec25b48fSsusans } 3055ec25b48fSsusans } 3056ec25b48fSsusans } 3057ec25b48fSsusans 3058ec25b48fSsusans /* 3059ec25b48fSsusans * as_iset1_default_lpsize() breaks its chunk into areas where existing 3060ec25b48fSsusans * segments have a smaller szc than we want to set. For each such area, 3061ec25b48fSsusans * it calls as_iset2_default_lpsize() 3062ec25b48fSsusans */ 3063ec25b48fSsusans static int 3064ec25b48fSsusans as_iset1_default_lpsize(struct as *as, caddr_t raddr, size_t rsize, uint_t szc, 3065ec25b48fSsusans uint_t szcvec) 3066ec25b48fSsusans { 3067ec25b48fSsusans struct seg *seg; 3068ec25b48fSsusans size_t ssize; 3069ec25b48fSsusans caddr_t setaddr = raddr; 3070ec25b48fSsusans size_t setsize = 0; 3071ec25b48fSsusans int set; 3072ec25b48fSsusans int error; 3073ec25b48fSsusans 3074dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 3075ec25b48fSsusans 3076ec25b48fSsusans seg = as_segat(as, raddr); 3077ec25b48fSsusans if (seg == NULL) { 3078ec25b48fSsusans panic("as_iset1_default_lpsize: no seg"); 3079ec25b48fSsusans } 3080ec25b48fSsusans if (seg->s_szc < szc) { 3081ec25b48fSsusans set = 1; 3082ec25b48fSsusans } else { 3083ec25b48fSsusans set = 0; 3084ec25b48fSsusans } 3085ec25b48fSsusans 3086ec25b48fSsusans for (; rsize != 0; rsize -= ssize, raddr += ssize, setsize += ssize) { 3087ec25b48fSsusans if (raddr >= seg->s_base + seg->s_size) { 3088ec25b48fSsusans seg = AS_SEGNEXT(as, seg); 3089ec25b48fSsusans if (seg == NULL || raddr != seg->s_base) { 3090ec25b48fSsusans panic("as_iset1_default_lpsize: as changed"); 3091ec25b48fSsusans } 3092ec25b48fSsusans if (seg->s_szc >= szc && set) { 3093ec25b48fSsusans ASSERT(setsize != 0); 3094ec25b48fSsusans error = as_iset2_default_lpsize(as, 3095ec25b48fSsusans setaddr, setsize, szc, szcvec); 3096ec25b48fSsusans if (error) { 3097ec25b48fSsusans return (error); 3098ec25b48fSsusans } 3099ec25b48fSsusans set = 0; 3100ec25b48fSsusans } else if (seg->s_szc < szc && !set) { 3101ec25b48fSsusans setaddr = raddr; 3102ec25b48fSsusans setsize = 0; 3103ec25b48fSsusans set = 1; 3104ec25b48fSsusans } 3105ec25b48fSsusans } 3106ec25b48fSsusans if ((raddr + rsize) > (seg->s_base + seg->s_size)) { 3107ec25b48fSsusans ssize = seg->s_base + seg->s_size - raddr; 3108ec25b48fSsusans } else { 3109ec25b48fSsusans ssize = rsize; 3110ec25b48fSsusans } 3111ec25b48fSsusans } 3112ec25b48fSsusans error = 0; 3113ec25b48fSsusans if (set) { 3114ec25b48fSsusans ASSERT(setsize != 0); 3115ec25b48fSsusans error = as_iset2_default_lpsize(as, setaddr, setsize, 3116ec25b48fSsusans szc, szcvec); 3117ec25b48fSsusans } 3118ec25b48fSsusans return (error); 3119ec25b48fSsusans } 3120ec25b48fSsusans 3121ec25b48fSsusans /* 3122ec25b48fSsusans * as_iset_default_lpsize() breaks its chunk according to the size code bitmap 3123ec25b48fSsusans * returned by map_pgszcvec() (similar to as_map_segvn_segs()), and passes each 3124ec25b48fSsusans * chunk to as_iset1_default_lpsize(). 3125ec25b48fSsusans */ 3126ec25b48fSsusans static int 3127ec25b48fSsusans as_iset_default_lpsize(struct as *as, caddr_t addr, size_t size, int flags, 3128ec25b48fSsusans int type) 3129ec25b48fSsusans { 3130ec25b48fSsusans int rtype = (type & MAP_SHARED) ? MAPPGSZC_SHM : MAPPGSZC_PRIVM; 3131ec25b48fSsusans uint_t szcvec = map_pgszcvec(addr, size, (uintptr_t)addr, 3132843e1988Sjohnlev flags, rtype, 1); 3133ec25b48fSsusans uint_t szc; 3134ec25b48fSsusans uint_t nszc; 3135ec25b48fSsusans int error; 3136ec25b48fSsusans caddr_t a; 3137ec25b48fSsusans caddr_t eaddr; 3138ec25b48fSsusans size_t segsize; 3139ec25b48fSsusans size_t pgsz; 3140ec25b48fSsusans uint_t save_szcvec; 3141ec25b48fSsusans 3142dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 3143ec25b48fSsusans ASSERT(IS_P2ALIGNED(addr, PAGESIZE)); 3144ec25b48fSsusans ASSERT(IS_P2ALIGNED(size, PAGESIZE)); 3145ec25b48fSsusans 3146ec25b48fSsusans szcvec &= ~1; 3147ec25b48fSsusans if (szcvec <= 1) { /* skip if base page size */ 3148ec25b48fSsusans return (0); 3149ec25b48fSsusans } 3150ec25b48fSsusans 3151ec25b48fSsusans /* Get the pagesize of the first larger page size. */ 3152ec25b48fSsusans szc = lowbit(szcvec) - 1; 3153ec25b48fSsusans pgsz = page_get_pagesize(szc); 3154ec25b48fSsusans eaddr = addr + size; 3155ec25b48fSsusans addr = (caddr_t)P2ROUNDUP((uintptr_t)addr, pgsz); 3156ec25b48fSsusans eaddr = (caddr_t)P2ALIGN((uintptr_t)eaddr, pgsz); 3157ec25b48fSsusans 3158ec25b48fSsusans save_szcvec = szcvec; 3159ec25b48fSsusans szcvec >>= (szc + 1); 3160ec25b48fSsusans nszc = szc; 3161ec25b48fSsusans while (szcvec) { 3162ec25b48fSsusans if ((szcvec & 0x1) == 0) { 3163ec25b48fSsusans nszc++; 3164ec25b48fSsusans szcvec >>= 1; 3165ec25b48fSsusans continue; 3166ec25b48fSsusans } 3167ec25b48fSsusans nszc++; 3168ec25b48fSsusans pgsz = page_get_pagesize(nszc); 3169ec25b48fSsusans a = (caddr_t)P2ROUNDUP((uintptr_t)addr, pgsz); 3170ec25b48fSsusans if (a != addr) { 3171ec25b48fSsusans ASSERT(szc > 0); 3172ec25b48fSsusans ASSERT(a < eaddr); 3173ec25b48fSsusans segsize = a - addr; 3174ec25b48fSsusans error = as_iset1_default_lpsize(as, addr, segsize, szc, 3175ec25b48fSsusans save_szcvec); 3176ec25b48fSsusans if (error) { 3177ec25b48fSsusans return (error); 3178ec25b48fSsusans } 3179ec25b48fSsusans addr = a; 3180ec25b48fSsusans } 3181ec25b48fSsusans szc = nszc; 3182ec25b48fSsusans szcvec >>= 1; 3183ec25b48fSsusans } 3184ec25b48fSsusans 3185ec25b48fSsusans ASSERT(addr < eaddr); 3186ec25b48fSsusans szcvec = save_szcvec; 3187ec25b48fSsusans while (szcvec) { 3188ec25b48fSsusans a = (caddr_t)P2ALIGN((uintptr_t)eaddr, pgsz); 3189ec25b48fSsusans ASSERT(a >= addr); 3190ec25b48fSsusans if (a != addr) { 3191ec25b48fSsusans ASSERT(szc > 0); 3192ec25b48fSsusans segsize = a - addr; 3193ec25b48fSsusans error = as_iset1_default_lpsize(as, addr, segsize, szc, 3194ec25b48fSsusans save_szcvec); 3195ec25b48fSsusans if (error) { 3196ec25b48fSsusans return (error); 3197ec25b48fSsusans } 3198ec25b48fSsusans addr = a; 3199ec25b48fSsusans } 3200ec25b48fSsusans szcvec &= ~(1 << szc); 3201ec25b48fSsusans if (szcvec) { 3202ec25b48fSsusans szc = highbit(szcvec) - 1; 3203ec25b48fSsusans pgsz = page_get_pagesize(szc); 3204ec25b48fSsusans } 3205ec25b48fSsusans } 3206ec25b48fSsusans ASSERT(addr == eaddr); 3207ec25b48fSsusans 3208ec25b48fSsusans return (0); 3209ec25b48fSsusans } 3210ec25b48fSsusans 3211ec25b48fSsusans /* 3212ec25b48fSsusans * Set the default large page size for the range. Called via memcntl with 3213ec25b48fSsusans * page size set to 0. as_set_default_lpsize breaks the range down into 3214ec25b48fSsusans * chunks with the same type/flags, ignores-non segvn segments, and passes 3215ec25b48fSsusans * each chunk to as_iset_default_lpsize(). 3216ec25b48fSsusans */ 3217ec25b48fSsusans int 3218ec25b48fSsusans as_set_default_lpsize(struct as *as, caddr_t addr, size_t size) 3219ec25b48fSsusans { 3220ec25b48fSsusans struct seg *seg; 3221ec25b48fSsusans caddr_t raddr; 3222ec25b48fSsusans size_t rsize; 3223ec25b48fSsusans size_t ssize; 3224ec25b48fSsusans int rtype, rflags; 3225ec25b48fSsusans int stype, sflags; 3226ec25b48fSsusans int error; 3227ec25b48fSsusans caddr_t setaddr; 3228ec25b48fSsusans size_t setsize; 3229ec25b48fSsusans int segvn; 3230ec25b48fSsusans 3231ec25b48fSsusans if (size == 0) 3232ec25b48fSsusans return (0); 3233ec25b48fSsusans 3234dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 3235ec25b48fSsusans again: 3236ec25b48fSsusans error = 0; 3237ec25b48fSsusans 3238ec25b48fSsusans raddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 3239ec25b48fSsusans rsize = (((size_t)(addr + size) + PAGEOFFSET) & PAGEMASK) - 3240ec25b48fSsusans (size_t)raddr; 3241ec25b48fSsusans 3242ec25b48fSsusans if (raddr + rsize < raddr) { /* check for wraparound */ 3243dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 3244ec25b48fSsusans return (ENOMEM); 3245ec25b48fSsusans } 3246ec25b48fSsusans as_clearwatchprot(as, raddr, rsize); 3247ec25b48fSsusans seg = as_segat(as, raddr); 3248ec25b48fSsusans if (seg == NULL) { 3249ec25b48fSsusans as_setwatch(as); 3250dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 3251ec25b48fSsusans return (ENOMEM); 3252ec25b48fSsusans } 3253ec25b48fSsusans if (seg->s_ops == &segvn_ops) { 3254ec25b48fSsusans rtype = SEGOP_GETTYPE(seg, addr); 3255ec25b48fSsusans rflags = rtype & (MAP_TEXT | MAP_INITDATA); 3256ec25b48fSsusans rtype = rtype & (MAP_SHARED | MAP_PRIVATE); 3257ec25b48fSsusans segvn = 1; 3258ec25b48fSsusans } else { 3259ec25b48fSsusans segvn = 0; 3260ec25b48fSsusans } 3261ec25b48fSsusans setaddr = raddr; 3262ec25b48fSsusans setsize = 0; 3263ec25b48fSsusans 3264ec25b48fSsusans for (; rsize != 0; rsize -= ssize, raddr += ssize, setsize += ssize) { 3265ec25b48fSsusans if (raddr >= (seg->s_base + seg->s_size)) { 3266ec25b48fSsusans seg = AS_SEGNEXT(as, seg); 3267ec25b48fSsusans if (seg == NULL || raddr != seg->s_base) { 3268ec25b48fSsusans error = ENOMEM; 3269ec25b48fSsusans break; 3270ec25b48fSsusans } 3271ec25b48fSsusans if (seg->s_ops == &segvn_ops) { 3272ec25b48fSsusans stype = SEGOP_GETTYPE(seg, raddr); 3273ec25b48fSsusans sflags = stype & (MAP_TEXT | MAP_INITDATA); 3274ec25b48fSsusans stype &= (MAP_SHARED | MAP_PRIVATE); 3275ec25b48fSsusans if (segvn && (rflags != sflags || 3276ec25b48fSsusans rtype != stype)) { 3277ec25b48fSsusans /* 3278ec25b48fSsusans * The next segment is also segvn but 3279ec25b48fSsusans * has different flags and/or type. 3280ec25b48fSsusans */ 3281ec25b48fSsusans ASSERT(setsize != 0); 3282ec25b48fSsusans error = as_iset_default_lpsize(as, 3283ec25b48fSsusans setaddr, setsize, rflags, rtype); 3284ec25b48fSsusans if (error) { 3285ec25b48fSsusans break; 3286ec25b48fSsusans } 3287ec25b48fSsusans rflags = sflags; 3288ec25b48fSsusans rtype = stype; 3289ec25b48fSsusans setaddr = raddr; 3290ec25b48fSsusans setsize = 0; 3291ec25b48fSsusans } else if (!segvn) { 3292ec25b48fSsusans rflags = sflags; 3293ec25b48fSsusans rtype = stype; 3294ec25b48fSsusans setaddr = raddr; 3295ec25b48fSsusans setsize = 0; 3296ec25b48fSsusans segvn = 1; 3297ec25b48fSsusans } 3298ec25b48fSsusans } else if (segvn) { 3299ec25b48fSsusans /* The next segment is not segvn. */ 3300ec25b48fSsusans ASSERT(setsize != 0); 3301ec25b48fSsusans error = as_iset_default_lpsize(as, 3302ec25b48fSsusans setaddr, setsize, rflags, rtype); 3303ec25b48fSsusans if (error) { 3304ec25b48fSsusans break; 3305ec25b48fSsusans } 3306ec25b48fSsusans segvn = 0; 3307ec25b48fSsusans } 3308ec25b48fSsusans } 3309ec25b48fSsusans if ((raddr + rsize) > (seg->s_base + seg->s_size)) { 3310ec25b48fSsusans ssize = seg->s_base + seg->s_size - raddr; 3311ec25b48fSsusans } else { 3312ec25b48fSsusans ssize = rsize; 3313ec25b48fSsusans } 3314ec25b48fSsusans } 3315ec25b48fSsusans if (error == 0 && segvn) { 3316ec25b48fSsusans /* The last chunk when rsize == 0. */ 3317ec25b48fSsusans ASSERT(setsize != 0); 3318ec25b48fSsusans error = as_iset_default_lpsize(as, setaddr, setsize, 3319ec25b48fSsusans rflags, rtype); 3320ec25b48fSsusans } 3321ec25b48fSsusans 3322ec25b48fSsusans if (error == IE_RETRY) { 3323ec25b48fSsusans goto again; 3324ec25b48fSsusans } else if (error == IE_NOMEM) { 3325ec25b48fSsusans error = EAGAIN; 3326ec25b48fSsusans } else if (error == ENOTSUP) { 3327ec25b48fSsusans error = EINVAL; 3328ec25b48fSsusans } else if (error == EAGAIN) { 3329ec25b48fSsusans mutex_enter(&as->a_contents); 3330a98e9dbfSaguzovsk if (!AS_ISNOUNMAPWAIT(as)) { 3331a98e9dbfSaguzovsk if (AS_ISUNMAPWAIT(as) == 0) { 3332a98e9dbfSaguzovsk cv_broadcast(&as->a_cv); 3333a98e9dbfSaguzovsk } 3334a98e9dbfSaguzovsk AS_SETUNMAPWAIT(as); 3335dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 3336a98e9dbfSaguzovsk while (AS_ISUNMAPWAIT(as)) { 3337a98e9dbfSaguzovsk cv_wait(&as->a_cv, &as->a_contents); 3338a98e9dbfSaguzovsk } 3339a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 3340dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_WRITER); 3341a98e9dbfSaguzovsk } else { 3342a98e9dbfSaguzovsk /* 3343a98e9dbfSaguzovsk * We may have raced with 3344a98e9dbfSaguzovsk * segvn_reclaim()/segspt_reclaim(). In this case 3345a98e9dbfSaguzovsk * clean nounmapwait flag and retry since softlockcnt 3346a98e9dbfSaguzovsk * in this segment may be already 0. We don't drop as 3347a98e9dbfSaguzovsk * writer lock so our number of retries without 3348a98e9dbfSaguzovsk * sleeping should be very small. See segvn_reclaim() 3349a98e9dbfSaguzovsk * for more comments. 3350a98e9dbfSaguzovsk */ 3351a98e9dbfSaguzovsk AS_CLRNOUNMAPWAIT(as); 3352a98e9dbfSaguzovsk mutex_exit(&as->a_contents); 3353ec25b48fSsusans } 3354ec25b48fSsusans goto again; 3355ec25b48fSsusans } 3356ec25b48fSsusans 3357ec25b48fSsusans as_setwatch(as); 3358dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 3359ec25b48fSsusans return (error); 3360ec25b48fSsusans } 3361ec25b48fSsusans 33627c478bd9Sstevel@tonic-gate /* 33637c478bd9Sstevel@tonic-gate * Setup all of the uninitialized watched pages that we can. 33647c478bd9Sstevel@tonic-gate */ 33657c478bd9Sstevel@tonic-gate void 33667c478bd9Sstevel@tonic-gate as_setwatch(struct as *as) 33677c478bd9Sstevel@tonic-gate { 33687c478bd9Sstevel@tonic-gate struct watched_page *pwp; 33697c478bd9Sstevel@tonic-gate struct seg *seg; 33707c478bd9Sstevel@tonic-gate caddr_t vaddr; 33717c478bd9Sstevel@tonic-gate uint_t prot; 33727c478bd9Sstevel@tonic-gate int err, retrycnt; 33737c478bd9Sstevel@tonic-gate 33747c478bd9Sstevel@tonic-gate if (avl_numnodes(&as->a_wpage) == 0) 33757c478bd9Sstevel@tonic-gate return; 33767c478bd9Sstevel@tonic-gate 3377dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 33787c478bd9Sstevel@tonic-gate 33797c478bd9Sstevel@tonic-gate for (pwp = avl_first(&as->a_wpage); pwp != NULL; 33807c478bd9Sstevel@tonic-gate pwp = AVL_NEXT(&as->a_wpage, pwp)) { 33817c478bd9Sstevel@tonic-gate retrycnt = 0; 33827c478bd9Sstevel@tonic-gate retry: 33837c478bd9Sstevel@tonic-gate vaddr = pwp->wp_vaddr; 33847c478bd9Sstevel@tonic-gate if (pwp->wp_oprot != 0 || /* already set up */ 33857c478bd9Sstevel@tonic-gate (seg = as_segat(as, vaddr)) == NULL || 33867c478bd9Sstevel@tonic-gate SEGOP_GETPROT(seg, vaddr, 0, &prot) != 0) 33877c478bd9Sstevel@tonic-gate continue; 33887c478bd9Sstevel@tonic-gate 33897c478bd9Sstevel@tonic-gate pwp->wp_oprot = prot; 33907c478bd9Sstevel@tonic-gate if (pwp->wp_read) 33917c478bd9Sstevel@tonic-gate prot &= ~(PROT_READ|PROT_WRITE|PROT_EXEC); 33927c478bd9Sstevel@tonic-gate if (pwp->wp_write) 33937c478bd9Sstevel@tonic-gate prot &= ~PROT_WRITE; 33947c478bd9Sstevel@tonic-gate if (pwp->wp_exec) 33957c478bd9Sstevel@tonic-gate prot &= ~(PROT_READ|PROT_WRITE|PROT_EXEC); 33967c478bd9Sstevel@tonic-gate if (!(pwp->wp_flags & WP_NOWATCH) && prot != pwp->wp_oprot) { 33977c478bd9Sstevel@tonic-gate err = SEGOP_SETPROT(seg, vaddr, PAGESIZE, prot); 33987c478bd9Sstevel@tonic-gate if (err == IE_RETRY) { 33997c478bd9Sstevel@tonic-gate pwp->wp_oprot = 0; 34007c478bd9Sstevel@tonic-gate ASSERT(retrycnt == 0); 34017c478bd9Sstevel@tonic-gate retrycnt++; 34027c478bd9Sstevel@tonic-gate goto retry; 34037c478bd9Sstevel@tonic-gate } 34047c478bd9Sstevel@tonic-gate } 34057c478bd9Sstevel@tonic-gate pwp->wp_prot = prot; 34067c478bd9Sstevel@tonic-gate } 34077c478bd9Sstevel@tonic-gate } 34087c478bd9Sstevel@tonic-gate 34097c478bd9Sstevel@tonic-gate /* 34107c478bd9Sstevel@tonic-gate * Clear all of the watched pages in the address space. 34117c478bd9Sstevel@tonic-gate */ 34127c478bd9Sstevel@tonic-gate void 34137c478bd9Sstevel@tonic-gate as_clearwatch(struct as *as) 34147c478bd9Sstevel@tonic-gate { 34157c478bd9Sstevel@tonic-gate struct watched_page *pwp; 34167c478bd9Sstevel@tonic-gate struct seg *seg; 34177c478bd9Sstevel@tonic-gate caddr_t vaddr; 34187c478bd9Sstevel@tonic-gate uint_t prot; 34197c478bd9Sstevel@tonic-gate int err, retrycnt; 34207c478bd9Sstevel@tonic-gate 34217c478bd9Sstevel@tonic-gate if (avl_numnodes(&as->a_wpage) == 0) 34227c478bd9Sstevel@tonic-gate return; 34237c478bd9Sstevel@tonic-gate 3424dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 34257c478bd9Sstevel@tonic-gate 34267c478bd9Sstevel@tonic-gate for (pwp = avl_first(&as->a_wpage); pwp != NULL; 34277c478bd9Sstevel@tonic-gate pwp = AVL_NEXT(&as->a_wpage, pwp)) { 34287c478bd9Sstevel@tonic-gate retrycnt = 0; 34297c478bd9Sstevel@tonic-gate retry: 34307c478bd9Sstevel@tonic-gate vaddr = pwp->wp_vaddr; 34317c478bd9Sstevel@tonic-gate if (pwp->wp_oprot == 0 || /* not set up */ 34327c478bd9Sstevel@tonic-gate (seg = as_segat(as, vaddr)) == NULL) 34337c478bd9Sstevel@tonic-gate continue; 34347c478bd9Sstevel@tonic-gate 34357c478bd9Sstevel@tonic-gate if ((prot = pwp->wp_oprot) != pwp->wp_prot) { 34367c478bd9Sstevel@tonic-gate err = SEGOP_SETPROT(seg, vaddr, PAGESIZE, prot); 34377c478bd9Sstevel@tonic-gate if (err == IE_RETRY) { 34387c478bd9Sstevel@tonic-gate ASSERT(retrycnt == 0); 34397c478bd9Sstevel@tonic-gate retrycnt++; 34407c478bd9Sstevel@tonic-gate goto retry; 34417c478bd9Sstevel@tonic-gate } 34427c478bd9Sstevel@tonic-gate } 34437c478bd9Sstevel@tonic-gate pwp->wp_oprot = 0; 34447c478bd9Sstevel@tonic-gate pwp->wp_prot = 0; 34457c478bd9Sstevel@tonic-gate } 34467c478bd9Sstevel@tonic-gate } 34477c478bd9Sstevel@tonic-gate 34487c478bd9Sstevel@tonic-gate /* 34497c478bd9Sstevel@tonic-gate * Force a new setup for all the watched pages in the range. 34507c478bd9Sstevel@tonic-gate */ 34517c478bd9Sstevel@tonic-gate static void 34527c478bd9Sstevel@tonic-gate as_setwatchprot(struct as *as, caddr_t addr, size_t size, uint_t prot) 34537c478bd9Sstevel@tonic-gate { 34547c478bd9Sstevel@tonic-gate struct watched_page *pwp; 34557c478bd9Sstevel@tonic-gate struct watched_page tpw; 34567c478bd9Sstevel@tonic-gate caddr_t eaddr = addr + size; 34577c478bd9Sstevel@tonic-gate caddr_t vaddr; 34587c478bd9Sstevel@tonic-gate struct seg *seg; 34597c478bd9Sstevel@tonic-gate int err, retrycnt; 34607c478bd9Sstevel@tonic-gate uint_t wprot; 34617c478bd9Sstevel@tonic-gate avl_index_t where; 34627c478bd9Sstevel@tonic-gate 34637c478bd9Sstevel@tonic-gate if (avl_numnodes(&as->a_wpage) == 0) 34647c478bd9Sstevel@tonic-gate return; 34657c478bd9Sstevel@tonic-gate 3466dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 34677c478bd9Sstevel@tonic-gate 34687c478bd9Sstevel@tonic-gate tpw.wp_vaddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 34697c478bd9Sstevel@tonic-gate if ((pwp = avl_find(&as->a_wpage, &tpw, &where)) == NULL) 34707c478bd9Sstevel@tonic-gate pwp = avl_nearest(&as->a_wpage, where, AVL_AFTER); 34717c478bd9Sstevel@tonic-gate 34727c478bd9Sstevel@tonic-gate while (pwp != NULL && pwp->wp_vaddr < eaddr) { 34737c478bd9Sstevel@tonic-gate retrycnt = 0; 34747c478bd9Sstevel@tonic-gate vaddr = pwp->wp_vaddr; 34757c478bd9Sstevel@tonic-gate 34767c478bd9Sstevel@tonic-gate wprot = prot; 34777c478bd9Sstevel@tonic-gate if (pwp->wp_read) 34787c478bd9Sstevel@tonic-gate wprot &= ~(PROT_READ|PROT_WRITE|PROT_EXEC); 34797c478bd9Sstevel@tonic-gate if (pwp->wp_write) 34807c478bd9Sstevel@tonic-gate wprot &= ~PROT_WRITE; 34817c478bd9Sstevel@tonic-gate if (pwp->wp_exec) 34827c478bd9Sstevel@tonic-gate wprot &= ~(PROT_READ|PROT_WRITE|PROT_EXEC); 34837c478bd9Sstevel@tonic-gate if (!(pwp->wp_flags & WP_NOWATCH) && wprot != pwp->wp_oprot) { 34847c478bd9Sstevel@tonic-gate retry: 34857c478bd9Sstevel@tonic-gate seg = as_segat(as, vaddr); 34867c478bd9Sstevel@tonic-gate if (seg == NULL) { 34877c478bd9Sstevel@tonic-gate panic("as_setwatchprot: no seg"); 34887c478bd9Sstevel@tonic-gate /*NOTREACHED*/ 34897c478bd9Sstevel@tonic-gate } 34907c478bd9Sstevel@tonic-gate err = SEGOP_SETPROT(seg, vaddr, PAGESIZE, wprot); 34917c478bd9Sstevel@tonic-gate if (err == IE_RETRY) { 34927c478bd9Sstevel@tonic-gate ASSERT(retrycnt == 0); 34937c478bd9Sstevel@tonic-gate retrycnt++; 34947c478bd9Sstevel@tonic-gate goto retry; 34957c478bd9Sstevel@tonic-gate } 34967c478bd9Sstevel@tonic-gate } 34977c478bd9Sstevel@tonic-gate pwp->wp_oprot = prot; 34987c478bd9Sstevel@tonic-gate pwp->wp_prot = wprot; 34997c478bd9Sstevel@tonic-gate 35007c478bd9Sstevel@tonic-gate pwp = AVL_NEXT(&as->a_wpage, pwp); 35017c478bd9Sstevel@tonic-gate } 35027c478bd9Sstevel@tonic-gate } 35037c478bd9Sstevel@tonic-gate 35047c478bd9Sstevel@tonic-gate /* 35057c478bd9Sstevel@tonic-gate * Clear all of the watched pages in the range. 35067c478bd9Sstevel@tonic-gate */ 35077c478bd9Sstevel@tonic-gate static void 35087c478bd9Sstevel@tonic-gate as_clearwatchprot(struct as *as, caddr_t addr, size_t size) 35097c478bd9Sstevel@tonic-gate { 35107c478bd9Sstevel@tonic-gate caddr_t eaddr = addr + size; 35117c478bd9Sstevel@tonic-gate struct watched_page *pwp; 35127c478bd9Sstevel@tonic-gate struct watched_page tpw; 35137c478bd9Sstevel@tonic-gate uint_t prot; 35147c478bd9Sstevel@tonic-gate struct seg *seg; 35157c478bd9Sstevel@tonic-gate int err, retrycnt; 35167c478bd9Sstevel@tonic-gate avl_index_t where; 35177c478bd9Sstevel@tonic-gate 35187c478bd9Sstevel@tonic-gate if (avl_numnodes(&as->a_wpage) == 0) 35197c478bd9Sstevel@tonic-gate return; 35207c478bd9Sstevel@tonic-gate 35217c478bd9Sstevel@tonic-gate tpw.wp_vaddr = (caddr_t)((uintptr_t)addr & (uintptr_t)PAGEMASK); 35227c478bd9Sstevel@tonic-gate if ((pwp = avl_find(&as->a_wpage, &tpw, &where)) == NULL) 35237c478bd9Sstevel@tonic-gate pwp = avl_nearest(&as->a_wpage, where, AVL_AFTER); 35247c478bd9Sstevel@tonic-gate 3525dc32d872SJosef 'Jeff' Sipek ASSERT(AS_WRITE_HELD(as)); 35267c478bd9Sstevel@tonic-gate 35277c478bd9Sstevel@tonic-gate while (pwp != NULL && pwp->wp_vaddr < eaddr) { 35287c478bd9Sstevel@tonic-gate 35297c478bd9Sstevel@tonic-gate if ((prot = pwp->wp_oprot) != 0) { 35307c478bd9Sstevel@tonic-gate retrycnt = 0; 35317c478bd9Sstevel@tonic-gate 35327c478bd9Sstevel@tonic-gate if (prot != pwp->wp_prot) { 35337c478bd9Sstevel@tonic-gate retry: 35347c478bd9Sstevel@tonic-gate seg = as_segat(as, pwp->wp_vaddr); 35357c478bd9Sstevel@tonic-gate if (seg == NULL) 35367c478bd9Sstevel@tonic-gate continue; 35377c478bd9Sstevel@tonic-gate err = SEGOP_SETPROT(seg, pwp->wp_vaddr, 35387c478bd9Sstevel@tonic-gate PAGESIZE, prot); 35397c478bd9Sstevel@tonic-gate if (err == IE_RETRY) { 35407c478bd9Sstevel@tonic-gate ASSERT(retrycnt == 0); 35417c478bd9Sstevel@tonic-gate retrycnt++; 35427c478bd9Sstevel@tonic-gate goto retry; 35437c478bd9Sstevel@tonic-gate 35447c478bd9Sstevel@tonic-gate } 35457c478bd9Sstevel@tonic-gate } 35467c478bd9Sstevel@tonic-gate pwp->wp_oprot = 0; 35477c478bd9Sstevel@tonic-gate pwp->wp_prot = 0; 35487c478bd9Sstevel@tonic-gate } 35497c478bd9Sstevel@tonic-gate 35507c478bd9Sstevel@tonic-gate pwp = AVL_NEXT(&as->a_wpage, pwp); 35517c478bd9Sstevel@tonic-gate } 35527c478bd9Sstevel@tonic-gate } 35537c478bd9Sstevel@tonic-gate 35547c478bd9Sstevel@tonic-gate void 35557c478bd9Sstevel@tonic-gate as_signal_proc(struct as *as, k_siginfo_t *siginfo) 35567c478bd9Sstevel@tonic-gate { 35577c478bd9Sstevel@tonic-gate struct proc *p; 35587c478bd9Sstevel@tonic-gate 35597c478bd9Sstevel@tonic-gate mutex_enter(&pidlock); 35607c478bd9Sstevel@tonic-gate for (p = practive; p; p = p->p_next) { 35617c478bd9Sstevel@tonic-gate if (p->p_as == as) { 35627c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 35637c478bd9Sstevel@tonic-gate if (p->p_as == as) 35647c478bd9Sstevel@tonic-gate sigaddq(p, NULL, siginfo, KM_NOSLEEP); 35657c478bd9Sstevel@tonic-gate mutex_exit(&p->p_lock); 35667c478bd9Sstevel@tonic-gate } 35677c478bd9Sstevel@tonic-gate } 35687c478bd9Sstevel@tonic-gate mutex_exit(&pidlock); 35697c478bd9Sstevel@tonic-gate } 35707c478bd9Sstevel@tonic-gate 35717c478bd9Sstevel@tonic-gate /* 35727c478bd9Sstevel@tonic-gate * return memory object ID 35737c478bd9Sstevel@tonic-gate */ 35747c478bd9Sstevel@tonic-gate int 35757c478bd9Sstevel@tonic-gate as_getmemid(struct as *as, caddr_t addr, memid_t *memidp) 35767c478bd9Sstevel@tonic-gate { 35777c478bd9Sstevel@tonic-gate struct seg *seg; 35787c478bd9Sstevel@tonic-gate int sts; 35797c478bd9Sstevel@tonic-gate 3580dc32d872SJosef 'Jeff' Sipek AS_LOCK_ENTER(as, RW_READER); 35817c478bd9Sstevel@tonic-gate seg = as_segat(as, addr); 35827c478bd9Sstevel@tonic-gate if (seg == NULL) { 3583dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 35847c478bd9Sstevel@tonic-gate return (EFAULT); 35857c478bd9Sstevel@tonic-gate } 35867c478bd9Sstevel@tonic-gate /* 35877c478bd9Sstevel@tonic-gate * catch old drivers which may not support getmemid 35887c478bd9Sstevel@tonic-gate */ 35897c478bd9Sstevel@tonic-gate if (seg->s_ops->getmemid == NULL) { 3590dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 35917c478bd9Sstevel@tonic-gate return (ENODEV); 35927c478bd9Sstevel@tonic-gate } 35937c478bd9Sstevel@tonic-gate 35947c478bd9Sstevel@tonic-gate sts = SEGOP_GETMEMID(seg, addr, memidp); 35957c478bd9Sstevel@tonic-gate 3596dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 35977c478bd9Sstevel@tonic-gate return (sts); 35987c478bd9Sstevel@tonic-gate } 3599