X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/91447636331957f3d9b5ca5b508f07c526b0074d..a991bd8d3e7fe02dbca0644054bab73c5b75324a:/osfmk/vm/memory_object.c diff --git a/osfmk/vm/memory_object.c b/osfmk/vm/memory_object.c index 286fcf691..7fa63cc7a 100644 --- a/osfmk/vm/memory_object.c +++ b/osfmk/vm/memory_object.c @@ -1,49 +1,55 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2020 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ -/* +/* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. - * + * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. - * + * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * + * * Carnegie Mellon requests users of this software to return to - * + * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 - * + * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ @@ -56,13 +62,11 @@ * External memory management interface control functions. */ -#include - /* * Interface dependencies: */ -#include /* For pointer_t */ +#include /* For pointer_t */ #include #include @@ -78,11 +82,10 @@ /* * Implementation dependencies: */ -#include /* For memcpy() */ +#include /* For memcpy() */ -#include #include -#include /* For current_thread() */ +#include /* For current_thread() */ #include #include @@ -91,20 +94,18 @@ #include #include #include -#include /* For pmap_clear_modify */ -#include /* For kernel_map, vm_move */ -#include /* For vm_map_pageable */ +#include /* For pmap_clear_modify */ +#include /* For kernel_map, vm_move */ +#include /* For vm_map_pageable */ +#include /* Needed by some vm_page.h macros */ +#include -#if MACH_PAGEMAP #include -#endif /* MACH_PAGEMAP */ #include - -memory_object_default_t memory_manager_default = MEMORY_OBJECT_DEFAULT_NULL; -vm_size_t memory_manager_default_cluster = 0; -decl_mutex_data(, memory_manager_default_lock) +memory_object_default_t memory_manager_default = MEMORY_OBJECT_DEFAULT_NULL; +LCK_MTX_EARLY_DECLARE(memory_manager_default_lock, &vm_object_lck_grp); /* @@ -120,29 +121,29 @@ decl_mutex_data(, memory_manager_default_lock) * 2. Page is precious and should_return is RETURN_ALL. * 3. Should_return is RETURN_ANYTHING. * - * As a side effect, m->dirty will be made consistent + * As a side effect, m->vmp_dirty will be made consistent * with pmap_is_modified(m), if should_return is not * MEMORY_OBJECT_RETURN_NONE. */ -#define memory_object_should_return_page(m, should_return) \ +#define memory_object_should_return_page(m, should_return) \ (should_return != MEMORY_OBJECT_RETURN_NONE && \ - (((m)->dirty || ((m)->dirty = pmap_is_modified((m)->phys_page))) || \ - ((m)->precious && (should_return) == MEMORY_OBJECT_RETURN_ALL) || \ + (((m)->vmp_dirty || ((m)->vmp_dirty = pmap_is_modified(VM_PAGE_GET_PHYS_PAGE(m)))) || \ + ((m)->vmp_precious && (should_return) == MEMORY_OBJECT_RETURN_ALL) || \ (should_return) == MEMORY_OBJECT_RETURN_ANYTHING)) -typedef int memory_object_lock_result_t; +typedef int memory_object_lock_result_t; -#define MEMORY_OBJECT_LOCK_RESULT_DONE 0 -#define MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK 1 -#define MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN 2 -#define MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN 3 +#define MEMORY_OBJECT_LOCK_RESULT_DONE 0 +#define MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK 1 +#define MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN 2 +#define MEMORY_OBJECT_LOCK_RESULT_MUST_FREE 3 memory_object_lock_result_t memory_object_lock_page( - vm_page_t m, - memory_object_return_t should_return, - boolean_t should_flush, - vm_prot_t prot); + vm_page_t m, + memory_object_return_t should_return, + boolean_t should_flush, + vm_prot_t prot); /* * Routine: memory_object_lock_page @@ -159,199 +160,114 @@ memory_object_lock_result_t memory_object_lock_page( */ memory_object_lock_result_t memory_object_lock_page( - vm_page_t m, - memory_object_return_t should_return, - boolean_t should_flush, - vm_prot_t prot) + vm_page_t m, + memory_object_return_t should_return, + boolean_t should_flush, + vm_prot_t prot) { - XPR(XPR_MEMORY_OBJECT, - "m_o_lock_page, page 0x%X rtn %d flush %d prot %d\n", - (integer_t)m, should_return, should_flush, prot, 0); - - /* - * If we cannot change access to the page, - * either because a mapping is in progress - * (busy page) or because a mapping has been - * wired, then give up. - */ + if (m->vmp_busy || m->vmp_cleaning) { + return MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK; + } - if (m->busy || m->cleaning) - return(MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK); + if (m->vmp_laundry) { + vm_pageout_steal_laundry(m, FALSE); + } /* * Don't worry about pages for which the kernel * does not have any data. */ - - if (m->absent || m->error || m->restart) { - if(m->error && should_flush) { - /* dump the page, pager wants us to */ - /* clean it up and there is no */ - /* relevant data to return */ - if(m->wire_count == 0) { - VM_PAGE_FREE(m); - return(MEMORY_OBJECT_LOCK_RESULT_DONE); - } - } else { - return(MEMORY_OBJECT_LOCK_RESULT_DONE); + if (m->vmp_absent || m->vmp_error || m->vmp_restart) { + if (m->vmp_error && should_flush && !VM_PAGE_WIRED(m)) { + /* + * dump the page, pager wants us to + * clean it up and there is no + * relevant data to return + */ + return MEMORY_OBJECT_LOCK_RESULT_MUST_FREE; } + return MEMORY_OBJECT_LOCK_RESULT_DONE; } + assert(!m->vmp_fictitious); - assert(!m->fictitious); - - if (m->wire_count != 0) { + if (VM_PAGE_WIRED(m)) { /* - * If no change would take place - * anyway, return successfully. - * - * No change means: - * Not flushing AND - * No change to page lock [2 checks] AND - * Should not return page - * - * XXX This doesn't handle sending a copy of a wired - * XXX page to the pager, but that will require some - * XXX significant surgery. + * The page is wired... just clean or return the page if needed. + * Wired pages don't get flushed or disconnected from the pmap. */ - if (!should_flush && - (m->page_lock == prot || prot == VM_PROT_NO_CHANGE) && - ! memory_object_should_return_page(m, should_return)) { - - /* - * Restart page unlock requests, - * even though no change took place. - * [Memory managers may be expecting - * to see new requests.] - */ - m->unlock_request = VM_PROT_NONE; - PAGE_WAKEUP(m); - - return(MEMORY_OBJECT_LOCK_RESULT_DONE); + if (memory_object_should_return_page(m, should_return)) { + return MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN; } - return(MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK); + return MEMORY_OBJECT_LOCK_RESULT_DONE; } - /* - * If the page is to be flushed, allow - * that to be done as part of the protection. - */ - - if (should_flush) - prot = VM_PROT_ALL; - - /* - * Set the page lock. - * - * If we are decreasing permission, do it now; - * let the fault handler take care of increases - * (pmap_page_protect may not increase protection). - */ - - if (prot != VM_PROT_NO_CHANGE) { - if ((m->page_lock ^ prot) & prot) { - pmap_page_protect(m->phys_page, VM_PROT_ALL & ~prot); - } -#if 0 - /* code associated with the vestigial - * memory_object_data_unlock + if (should_flush) { + /* + * must do the pmap_disconnect before determining the + * need to return the page... otherwise it's possible + * for the page to go from the clean to the dirty state + * after we've made our decision */ - m->page_lock = prot; - m->lock_supplied = TRUE; - if (prot != VM_PROT_NONE) - m->unusual = TRUE; - else - m->unusual = FALSE; - + if (pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m)) & VM_MEM_MODIFIED) { + SET_PAGE_DIRTY(m, FALSE); + } + } else { /* - * Restart any past unlock requests, even if no - * change resulted. If the manager explicitly - * requested no protection change, then it is assumed - * to be remembering past requests. + * If we are decreasing permission, do it now; + * let the fault handler take care of increases + * (pmap_page_protect may not increase protection). */ - - m->unlock_request = VM_PROT_NONE; -#endif /* 0 */ - PAGE_WAKEUP(m); + if (prot != VM_PROT_NO_CHANGE) { + pmap_page_protect(VM_PAGE_GET_PHYS_PAGE(m), VM_PROT_ALL & ~prot); + } } - /* - * Handle page returning. + * Handle returning dirty or precious pages */ - if (memory_object_should_return_page(m, should_return)) { - /* - * If we weren't planning - * to flush the page anyway, - * we may need to remove the - * page from the pageout - * system and from physical - * maps now. + * we use to do a pmap_disconnect here in support + * of memory_object_lock_request, but that routine + * no longer requires this... in any event, in + * our world, it would turn into a big noop since + * we don't lock the page in any way and as soon + * as we drop the object lock, the page can be + * faulted back into an address space + * + * if (!should_flush) + * pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m)); */ - - vm_page_lock_queues(); - VM_PAGE_QUEUES_REMOVE(m); - vm_page_unlock_queues(); - - if (!should_flush) - pmap_disconnect(m->phys_page); - - if (m->dirty) - return(MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN); - else - return(MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN); + return MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN; } /* - * Handle flushing + * Handle flushing clean pages */ - if (should_flush) { - VM_PAGE_FREE(m); - } else { - /* - * XXX Make clean but not flush a paging hint, - * and deactivate the pages. This is a hack - * because it overloads flush/clean with - * implementation-dependent meaning. This only - * happens to pages that are already clean. - */ - - if (vm_page_deactivate_hint && - (should_return != MEMORY_OBJECT_RETURN_NONE)) { - vm_page_lock_queues(); - vm_page_deactivate(m); - vm_page_unlock_queues(); - } + return MEMORY_OBJECT_LOCK_RESULT_MUST_FREE; } - return(MEMORY_OBJECT_LOCK_RESULT_DONE); + /* + * we use to deactivate clean pages at this point, + * but we do not believe that an msync should change + * the 'age' of a page in the cache... here is the + * original comment and code concerning this... + * + * XXX Make clean but not flush a paging hint, + * and deactivate the pages. This is a hack + * because it overloads flush/clean with + * implementation-dependent meaning. This only + * happens to pages that are already clean. + * + * if (vm_page_deactivate_hint && (should_return != MEMORY_OBJECT_RETURN_NONE)) + * return (MEMORY_OBJECT_LOCK_RESULT_MUST_DEACTIVATE); + */ + + return MEMORY_OBJECT_LOCK_RESULT_DONE; } -#define LIST_REQ_PAGEOUT_PAGES(object, data_cnt, action, po, ro, ioerr, iosync) \ -MACRO_BEGIN \ - \ - register int upl_flags; \ - \ - vm_object_unlock(object); \ - \ - if (iosync) \ - upl_flags = UPL_MSYNC | UPL_IOSYNC; \ - else \ - upl_flags = UPL_MSYNC; \ - \ - (void) memory_object_data_return(object->pager, \ - po, \ - data_cnt, \ - ro, \ - ioerr, \ - (action == MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN), \ - !should_flush, \ - upl_flags); \ - \ - vm_object_lock(object); \ -MACRO_END + /* * Routine: memory_object_lock_request [user interface] @@ -364,7 +280,7 @@ MACRO_END * forms specified by "prot"); * 2) return data to the manager (if "should_return" * is RETURN_DIRTY and the page is dirty, or - * "should_return" is RETURN_ALL and the page + * "should_return" is RETURN_ALL and the page * is either dirty or precious); and, * 3) flush the cached copy (if "should_flush" * is asserted). @@ -380,34 +296,28 @@ MACRO_END kern_return_t memory_object_lock_request( - memory_object_control_t control, - memory_object_offset_t offset, - memory_object_size_t size, - memory_object_offset_t * resid_offset, - int * io_errno, - memory_object_return_t should_return, - int flags, - vm_prot_t prot) + memory_object_control_t control, + memory_object_offset_t offset, + memory_object_size_t size, + memory_object_offset_t * resid_offset, + int * io_errno, + memory_object_return_t should_return, + int flags, + vm_prot_t prot) { - vm_object_t object; - __unused boolean_t should_flush; - - should_flush = flags & MEMORY_OBJECT_DATA_FLUSH; - - XPR(XPR_MEMORY_OBJECT, - "m_o_lock_request, control 0x%X off 0x%X size 0x%X flags %X prot %X\n", - (integer_t)control, offset, size, - (((should_return&1)<<1)|should_flush), prot); + vm_object_t object; /* * Check for bogus arguments. */ object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } - if ((prot & ~VM_PROT_ALL) != 0 && prot != VM_PROT_NO_CHANGE) - return (KERN_INVALID_ARGUMENT); + if ((prot & ~VM_PROT_ALL) != 0 && prot != VM_PROT_NO_CHANGE) { + return KERN_INVALID_ARGUMENT; + } size = round_page_64(size); @@ -417,15 +327,26 @@ memory_object_lock_request( */ vm_object_lock(object); vm_object_paging_begin(object); + + if (flags & MEMORY_OBJECT_DATA_FLUSH_ALL) { + if ((should_return != MEMORY_OBJECT_RETURN_NONE) || offset || object->copy) { + flags &= ~MEMORY_OBJECT_DATA_FLUSH_ALL; + flags |= MEMORY_OBJECT_DATA_FLUSH; + } + } offset -= object->paging_offset; - (void)vm_object_update(object, - offset, size, resid_offset, io_errno, should_return, flags, prot); + if (flags & MEMORY_OBJECT_DATA_FLUSH_ALL) { + vm_object_reap_pages(object, REAP_DATA_FLUSH); + } else { + (void)vm_object_update(object, offset, size, resid_offset, + io_errno, should_return, flags, prot); + } vm_object_paging_end(object); vm_object_unlock(object); - return (KERN_SUCCESS); + return KERN_SUCCESS; } /* @@ -440,21 +361,22 @@ memory_object_lock_request( * being the name. * If the decision is made to proceed the name field flag is set to * false and the reference count is decremented. If the RESPECT_CACHE - * flag is set and the reference count has gone to zero, the + * flag is set and the reference count has gone to zero, the * memory_object is checked to see if it is cacheable otherwise when * the reference count is zero, it is simply terminated. */ kern_return_t memory_object_release_name( - memory_object_control_t control, - int flags) + memory_object_control_t control, + int flags) { - vm_object_t object; + vm_object_t object; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } return vm_object_release_name(object, flags); } @@ -470,16 +392,17 @@ memory_object_release_name( */ kern_return_t memory_object_destroy( - memory_object_control_t control, - kern_return_t reason) + memory_object_control_t control, + kern_return_t reason) { - vm_object_t object; + vm_object_t object; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } - return (vm_object_destroy(object, reason)); + return vm_object_destroy(object, reason); } /* @@ -508,20 +431,16 @@ memory_object_destroy( boolean_t vm_object_sync( - vm_object_t object, - vm_object_offset_t offset, - vm_object_size_t size, - boolean_t should_flush, - boolean_t should_return, - boolean_t should_iosync) + vm_object_t object, + vm_object_offset_t offset, + vm_object_size_t size, + boolean_t should_flush, + boolean_t should_return, + boolean_t should_iosync) { - boolean_t rv; + boolean_t rv; int flags; - XPR(XPR_VM_OBJECT, - "vm_o_sync, object 0x%X, offset 0x%X size 0x%x flush %d rtn %d\n", - (integer_t)object, offset, size, should_flush, should_return); - /* * Lock the object, and acquire a paging reference to * prevent the memory_object and control ports from @@ -530,20 +449,30 @@ vm_object_sync( vm_object_lock(object); vm_object_paging_begin(object); - if (should_flush) - flags = MEMORY_OBJECT_DATA_FLUSH; - else - flags = 0; + if (should_flush) { + flags = MEMORY_OBJECT_DATA_FLUSH; + /* + * This flush is from an msync(), not a truncate(), so the + * contents of the file are not affected. + * MEMORY_OBECT_DATA_NO_CHANGE lets vm_object_update() know + * that the data is not changed and that there's no need to + * push the old contents to a copy object. + */ + flags |= MEMORY_OBJECT_DATA_NO_CHANGE; + } else { + flags = 0; + } - if (should_iosync) - flags |= MEMORY_OBJECT_IO_SYNC; + if (should_iosync) { + flags |= MEMORY_OBJECT_IO_SYNC; + } rv = vm_object_update(object, offset, (vm_object_size_t)size, NULL, NULL, - (should_return) ? - MEMORY_OBJECT_RETURN_ALL : - MEMORY_OBJECT_RETURN_NONE, - flags, - VM_PROT_NO_CHANGE); + (should_return) ? + MEMORY_OBJECT_RETURN_ALL : + MEMORY_OBJECT_RETURN_NONE, + flags, + VM_PROT_NO_CHANGE); vm_object_paging_end(object); @@ -553,144 +482,202 @@ vm_object_sync( +#define LIST_REQ_PAGEOUT_PAGES(object, data_cnt, po, ro, ioerr, iosync) \ +MACRO_BEGIN \ + \ + int upl_flags; \ + memory_object_t pager; \ + \ + if ((pager = (object)->pager) != MEMORY_OBJECT_NULL) { \ + vm_object_paging_begin(object); \ + vm_object_unlock(object); \ + \ + if (iosync) \ + upl_flags = UPL_MSYNC | UPL_IOSYNC; \ + else \ + upl_flags = UPL_MSYNC; \ + \ + (void) memory_object_data_return(pager, \ + po, \ + (memory_object_cluster_size_t)data_cnt, \ + ro, \ + ioerr, \ + FALSE, \ + FALSE, \ + upl_flags); \ + \ + vm_object_lock(object); \ + vm_object_paging_end(object); \ + } \ +MACRO_END + +extern struct vnode * +vnode_pager_lookup_vnode(memory_object_t); static int vm_object_update_extent( - vm_object_t object, - vm_object_offset_t offset, - vm_object_offset_t offset_end, - vm_object_offset_t *offset_resid, - int *io_errno, - boolean_t should_flush, - memory_object_return_t should_return, - boolean_t should_iosync, - vm_prot_t prot) + vm_object_t object, + vm_object_offset_t offset, + vm_object_offset_t offset_end, + vm_object_offset_t *offset_resid, + int *io_errno, + boolean_t should_flush, + memory_object_return_t should_return, + boolean_t should_iosync, + vm_prot_t prot) { - vm_page_t m; - int retval = 0; - vm_size_t data_cnt = 0; - vm_object_offset_t paging_offset = 0; - vm_object_offset_t last_offset = offset; - memory_object_lock_result_t page_lock_result; - memory_object_lock_result_t pageout_action; - - pageout_action = MEMORY_OBJECT_LOCK_RESULT_DONE; + vm_page_t m; + int retval = 0; + vm_object_offset_t paging_offset = 0; + vm_object_offset_t next_offset = offset; + memory_object_lock_result_t page_lock_result; + memory_object_cluster_size_t data_cnt = 0; + struct vm_page_delayed_work dw_array; + struct vm_page_delayed_work *dwp, *dwp_start; + bool dwp_finish_ctx = TRUE; + int dw_count; + int dw_limit; + int dirty_count; + + dwp_start = dwp = NULL; + dw_count = 0; + dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT); + dwp_start = vm_page_delayed_work_get_ctx(); + if (dwp_start == NULL) { + dwp_start = &dw_array; + dw_limit = 1; + dwp_finish_ctx = FALSE; + } + dwp = dwp_start; - for (; - offset < offset_end && object->resident_page_count; - offset += PAGE_SIZE_64) { + dirty_count = 0; - /* - * Limit the number of pages to be cleaned at once. + for (; + offset < offset_end && object->resident_page_count; + offset += PAGE_SIZE_64) { + /* + * Limit the number of pages to be cleaned at once to a contiguous + * run, or at most MAX_UPL_TRANSFER_BYTES */ - if (data_cnt >= PAGE_SIZE * MAX_UPL_TRANSFER) { - LIST_REQ_PAGEOUT_PAGES(object, data_cnt, - pageout_action, paging_offset, offset_resid, io_errno, should_iosync); - data_cnt = 0; + if (data_cnt) { + if ((data_cnt >= MAX_UPL_TRANSFER_BYTES) || (next_offset != offset)) { + if (dw_count) { + vm_page_do_delayed_work(object, VM_KERN_MEMORY_NONE, dwp_start, dw_count); + dwp = dwp_start; + dw_count = 0; + } + LIST_REQ_PAGEOUT_PAGES(object, data_cnt, + paging_offset, offset_resid, io_errno, should_iosync); + data_cnt = 0; + } } - while ((m = vm_page_lookup(object, offset)) != VM_PAGE_NULL) { - page_lock_result = memory_object_lock_page(m, should_return, should_flush, prot); - - XPR(XPR_MEMORY_OBJECT, - "m_o_update: lock_page, obj 0x%X offset 0x%X result %d\n", - (integer_t)object, offset, page_lock_result, 0, 0); - - switch (page_lock_result) - { - case MEMORY_OBJECT_LOCK_RESULT_DONE: - /* - * End of a cluster of dirty pages. - */ - if (data_cnt) { - LIST_REQ_PAGEOUT_PAGES(object, - data_cnt, pageout_action, - paging_offset, offset_resid, io_errno, should_iosync); - data_cnt = 0; - continue; - } - break; - - case MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK: - /* - * Since it is necessary to block, - * clean any dirty pages now. - */ - if (data_cnt) { - LIST_REQ_PAGEOUT_PAGES(object, - data_cnt, pageout_action, - paging_offset, offset_resid, io_errno, should_iosync); - data_cnt = 0; - continue; - } - PAGE_SLEEP(object, m, THREAD_UNINT); - continue; - - case MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN: - case MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN: - /* - * The clean and return cases are similar. - * - * if this would form a discontiguous block, - * clean the old pages and start anew. - * - * Mark the page busy since we will unlock the - * object if we issue the LIST_REQ_PAGEOUT - */ - m->busy = TRUE; - if (data_cnt && - ((last_offset != offset) || (pageout_action != page_lock_result))) { - LIST_REQ_PAGEOUT_PAGES(object, - data_cnt, pageout_action, - paging_offset, offset_resid, io_errno, should_iosync); - data_cnt = 0; - } - m->busy = FALSE; - - if (m->cleaning) { - PAGE_SLEEP(object, m, THREAD_UNINT); - continue; - } - if (data_cnt == 0) { - pageout_action = page_lock_result; - paging_offset = offset; - } - data_cnt += PAGE_SIZE; - last_offset = offset + PAGE_SIZE_64; - - vm_page_lock_queues(); - /* - * Clean - */ - m->list_req_pending = TRUE; - m->cleaning = TRUE; - - if (should_flush) { - /* - * and add additional state - * for the flush - */ - m->busy = TRUE; - m->pageout = TRUE; - vm_page_wire(m); - } - vm_page_unlock_queues(); - - retval = 1; - break; + dwp->dw_mask = 0; + + page_lock_result = memory_object_lock_page(m, should_return, should_flush, prot); + + if (data_cnt && page_lock_result != MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN) { + /* + * End of a run of dirty/precious pages. + */ + if (dw_count) { + vm_page_do_delayed_work(object, VM_KERN_MEMORY_NONE, dwp_start, dw_count); + dwp = dwp_start; + dw_count = 0; + } + LIST_REQ_PAGEOUT_PAGES(object, data_cnt, + paging_offset, offset_resid, io_errno, should_iosync); + /* + * LIST_REQ_PAGEOUT_PAGES will drop the object lock which will + * allow the state of page 'm' to change... we need to re-lookup + * the current offset + */ + data_cnt = 0; + continue; + } + + switch (page_lock_result) { + case MEMORY_OBJECT_LOCK_RESULT_DONE: + break; + + case MEMORY_OBJECT_LOCK_RESULT_MUST_FREE: + if (m->vmp_dirty == TRUE) { + dirty_count++; + } + dwp->dw_mask |= DW_vm_page_free; + break; + + case MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK: + PAGE_SLEEP(object, m, THREAD_UNINT); + continue; + + case MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN: + if (data_cnt == 0) { + paging_offset = offset; + } + + data_cnt += PAGE_SIZE; + next_offset = offset + PAGE_SIZE_64; + + /* + * wired pages shouldn't be flushed and + * since they aren't on any queue, + * no need to remove them + */ + if (!VM_PAGE_WIRED(m)) { + if (should_flush) { + /* + * add additional state for the flush + */ + m->vmp_free_when_done = TRUE; + } + /* + * we use to remove the page from the queues at this + * point, but we do not believe that an msync + * should cause the 'age' of a page to be changed + * + * else + * dwp->dw_mask |= DW_VM_PAGE_QUEUES_REMOVE; + */ + } + retval = 1; + break; + } + if (dwp->dw_mask) { + VM_PAGE_ADD_DELAYED_WORK(dwp, m, dw_count); + + if (dw_count >= dw_limit) { + vm_page_do_delayed_work(object, VM_KERN_MEMORY_NONE, dwp_start, dw_count); + dwp = dwp_start; + dw_count = 0; + } } break; } } + + if (object->pager) { + task_update_logical_writes(current_task(), (dirty_count * PAGE_SIZE), TASK_WRITE_INVALIDATED, vnode_pager_lookup_vnode(object->pager)); + } /* * We have completed the scan for applicable pages. * Clean any pages that have been saved. */ + if (dw_count) { + vm_page_do_delayed_work(object, VM_KERN_MEMORY_NONE, dwp_start, dw_count); + } + if (data_cnt) { - LIST_REQ_PAGEOUT_PAGES(object, - data_cnt, pageout_action, paging_offset, offset_resid, io_errno, should_iosync); + LIST_REQ_PAGEOUT_PAGES(object, data_cnt, + paging_offset, offset_resid, io_errno, should_iosync); } - return (retval); + + if (dwp_start && dwp_finish_ctx) { + vm_page_delayed_work_finish_ctx(dwp_start); + dwp_start = dwp = NULL; + } + + return retval; } @@ -704,29 +691,30 @@ vm_object_update_extent( */ kern_return_t vm_object_update( - register vm_object_t object, - register vm_object_offset_t offset, - register vm_object_size_t size, - register vm_object_offset_t *resid_offset, - int *io_errno, - memory_object_return_t should_return, - int flags, - vm_prot_t protection) + vm_object_t object, + vm_object_offset_t offset, + vm_object_size_t size, + vm_object_offset_t *resid_offset, + int *io_errno, + memory_object_return_t should_return, + int flags, + vm_prot_t protection) { - vm_object_t copy_object; - boolean_t data_returned = FALSE; - boolean_t update_cow; - boolean_t should_flush = (flags & MEMORY_OBJECT_DATA_FLUSH) ? TRUE : FALSE; - boolean_t should_iosync = (flags & MEMORY_OBJECT_IO_SYNC) ? TRUE : FALSE; - int num_of_extents; - int n; -#define MAX_EXTENTS 8 -#define EXTENT_SIZE (1024 * 1024 * 256) -#define RESIDENT_LIMIT (1024 * 32) + vm_object_t copy_object = VM_OBJECT_NULL; + boolean_t data_returned = FALSE; + boolean_t update_cow; + boolean_t should_flush = (flags & MEMORY_OBJECT_DATA_FLUSH) ? TRUE : FALSE; + boolean_t should_iosync = (flags & MEMORY_OBJECT_IO_SYNC) ? TRUE : FALSE; + vm_fault_return_t result; + int num_of_extents; + int n; +#define MAX_EXTENTS 8 +#define EXTENT_SIZE (1024 * 1024 * 256) +#define RESIDENT_LIMIT (1024 * 32) struct extent { - vm_object_offset_t e_base; - vm_object_offset_t e_min; - vm_object_offset_t e_max; + vm_object_offset_t e_base; + vm_object_offset_t e_min; + vm_object_offset_t e_max; } extents[MAX_EXTENTS]; /* @@ -746,141 +734,192 @@ vm_object_update( * XXX coalescing implications before doing so. */ - update_cow = ((flags & MEMORY_OBJECT_DATA_FLUSH) - && (!(flags & MEMORY_OBJECT_DATA_NO_CHANGE) && - !(flags & MEMORY_OBJECT_DATA_PURGE))) - || (flags & MEMORY_OBJECT_COPY_SYNC); - - - if((((copy_object = object->copy) != NULL) && update_cow) || - (flags & MEMORY_OBJECT_DATA_SYNC)) { - vm_map_size_t i; - vm_map_size_t copy_size; - vm_map_offset_t copy_offset; - vm_prot_t prot; - vm_page_t page; - vm_page_t top_page; - kern_return_t error = 0; - - if(copy_object != NULL) { - /* translate offset with respect to shadow's offset */ - copy_offset = (offset >= copy_object->shadow_offset)? - (vm_map_offset_t)(offset - copy_object->shadow_offset) : - (vm_map_offset_t) 0; - if(copy_offset > copy_object->size) - copy_offset = copy_object->size; - - /* clip size with respect to shadow offset */ - if (offset >= copy_object->shadow_offset) { - copy_size = size; - } else if (size >= copy_object->shadow_offset - offset) { - copy_size = size - - (copy_object->shadow_offset - offset); - } else { - copy_size = 0; - } - - if (copy_offset + copy_size > copy_object->size) { - if (copy_object->size >= copy_offset) { - copy_size = copy_object->size - copy_offset; - } else { - copy_size = 0; - } - } - - copy_size+=copy_offset; - - vm_object_unlock(object); - vm_object_lock(copy_object); + update_cow = ((flags & MEMORY_OBJECT_DATA_FLUSH) + && (!(flags & MEMORY_OBJECT_DATA_NO_CHANGE) && + !(flags & MEMORY_OBJECT_DATA_PURGE))) + || (flags & MEMORY_OBJECT_COPY_SYNC); + + if (update_cow || (flags & (MEMORY_OBJECT_DATA_PURGE | MEMORY_OBJECT_DATA_SYNC))) { + int collisions = 0; + + while ((copy_object = object->copy) != VM_OBJECT_NULL) { + /* + * need to do a try here since we're swimming upstream + * against the normal lock ordering... however, we need + * to hold the object stable until we gain control of the + * copy object so we have to be careful how we approach this + */ + if (vm_object_lock_try(copy_object)) { + /* + * we 'won' the lock on the copy object... + * no need to hold the object lock any longer... + * take a real reference on the copy object because + * we're going to call vm_fault_page on it which may + * under certain conditions drop the lock and the paging + * reference we're about to take... the reference + * will keep the copy object from going away if that happens + */ + vm_object_unlock(object); + vm_object_reference_locked(copy_object); + break; + } + vm_object_unlock(object); + + collisions++; + mutex_pause(collisions); + + vm_object_lock(object); + } + } + if ((copy_object != VM_OBJECT_NULL && update_cow) || (flags & MEMORY_OBJECT_DATA_SYNC)) { + vm_object_offset_t i; + vm_object_size_t copy_size; + vm_object_offset_t copy_offset; + vm_prot_t prot; + vm_page_t page; + vm_page_t top_page; + kern_return_t error = 0; + struct vm_object_fault_info fault_info = {}; + + if (copy_object != VM_OBJECT_NULL) { + /* + * translate offset with respect to shadow's offset + */ + copy_offset = (offset >= copy_object->vo_shadow_offset) ? + (offset - copy_object->vo_shadow_offset) : 0; + + if (copy_offset > copy_object->vo_size) { + copy_offset = copy_object->vo_size; + } + + /* + * clip size with respect to shadow offset + */ + if (offset >= copy_object->vo_shadow_offset) { + copy_size = size; + } else if (size >= copy_object->vo_shadow_offset - offset) { + copy_size = (size - (copy_object->vo_shadow_offset - offset)); + } else { + copy_size = 0; + } + + if (copy_offset + copy_size > copy_object->vo_size) { + if (copy_object->vo_size >= copy_offset) { + copy_size = copy_object->vo_size - copy_offset; + } else { + copy_size = 0; + } + } + copy_size += copy_offset; } else { copy_object = object; copy_size = offset + size; copy_offset = offset; } + fault_info.interruptible = THREAD_UNINT; + fault_info.behavior = VM_BEHAVIOR_SEQUENTIAL; + fault_info.lo_offset = copy_offset; + fault_info.hi_offset = copy_size; + fault_info.stealth = TRUE; + assert(fault_info.cs_bypass == FALSE); + assert(fault_info.pmap_cs_associated == FALSE); vm_object_paging_begin(copy_object); - for (i=copy_offset; iobject, top_page); - PAGE_WAKEUP_DONE(page); - vm_page_lock_queues(); - if (!page->active && !page->inactive) - vm_page_activate(page); - vm_page_unlock_queues(); + VM_PAGE_OBJECT(page), top_page); vm_object_lock(copy_object); vm_object_paging_begin(copy_object); - } else { - PAGE_WAKEUP_DONE(page); - vm_page_lock_queues(); - if (!page->active && !page->inactive) - vm_page_activate(page); + } + if ((!VM_PAGE_NON_SPECULATIVE_PAGEABLE(page))) { + vm_page_lockspin_queues(); + + if ((!VM_PAGE_NON_SPECULATIVE_PAGEABLE(page))) { + vm_page_deactivate(page); + } vm_page_unlock_queues(); } + PAGE_WAKEUP_DONE(page); break; case VM_FAULT_RETRY: - prot = VM_PROT_WRITE|VM_PROT_READ; + prot = VM_PROT_WRITE | VM_PROT_READ; vm_object_lock(copy_object); vm_object_paging_begin(copy_object); goto RETRY_COW_OF_LOCK_REQUEST; case VM_FAULT_INTERRUPTED: - prot = VM_PROT_WRITE|VM_PROT_READ; + prot = VM_PROT_WRITE | VM_PROT_READ; vm_object_lock(copy_object); vm_object_paging_begin(copy_object); goto RETRY_COW_OF_LOCK_REQUEST; case VM_FAULT_MEMORY_SHORTAGE: VM_PAGE_WAIT(); - prot = VM_PROT_WRITE|VM_PROT_READ; - vm_object_lock(copy_object); - vm_object_paging_begin(copy_object); - goto RETRY_COW_OF_LOCK_REQUEST; - case VM_FAULT_FICTITIOUS_SHORTAGE: - vm_page_more_fictitious(); - prot = VM_PROT_WRITE|VM_PROT_READ; + prot = VM_PROT_WRITE | VM_PROT_READ; vm_object_lock(copy_object); vm_object_paging_begin(copy_object); goto RETRY_COW_OF_LOCK_REQUEST; + case VM_FAULT_SUCCESS_NO_VM_PAGE: + /* success but no VM page: fail */ + vm_object_paging_end(copy_object); + vm_object_unlock(copy_object); + OS_FALLTHROUGH; case VM_FAULT_MEMORY_ERROR: + if (object != copy_object) { + vm_object_deallocate(copy_object); + } vm_object_lock(object); goto BYPASS_COW_COPYIN; + default: + panic("vm_object_update: unexpected error 0x%x" + " from vm_fault_page()\n", result); } - } vm_object_paging_end(copy_object); - if(copy_object != object) { + } + if ((flags & (MEMORY_OBJECT_DATA_SYNC | MEMORY_OBJECT_COPY_SYNC))) { + if (copy_object != VM_OBJECT_NULL && copy_object != object) { vm_object_unlock(copy_object); + vm_object_deallocate(copy_object); vm_object_lock(object); } + return KERN_SUCCESS; } - if((flags & (MEMORY_OBJECT_DATA_SYNC | MEMORY_OBJECT_COPY_SYNC))) { - return KERN_SUCCESS; - } - if(((copy_object = object->copy) != NULL) && - (flags & MEMORY_OBJECT_DATA_PURGE)) { - copy_object->shadow_severed = TRUE; - copy_object->shadowed = FALSE; - copy_object->shadow = NULL; - /* delete the ref the COW was holding on the target object */ - vm_object_deallocate(object); + if (copy_object != VM_OBJECT_NULL && copy_object != object) { + if ((flags & MEMORY_OBJECT_DATA_PURGE)) { + vm_object_lock_assert_exclusive(copy_object); + copy_object->shadow_severed = TRUE; + copy_object->shadowed = FALSE; + copy_object->shadow = NULL; + /* + * delete the ref the COW was holding on the target object + */ + vm_object_deallocate(object); + } + vm_object_unlock(copy_object); + vm_object_deallocate(copy_object); + vm_object_lock(object); } BYPASS_COW_COPYIN: @@ -892,9 +931,9 @@ BYPASS_COW_COPYIN: * the page which means the resident queue can change which * means we can't walk the queue as we process the pages * we also want to do the processing in offset order to allow - * 'runs' of pages to be collected if we're being told to + * 'runs' of pages to be collected if we're being told to * flush to disk... the resident page queue is NOT ordered. - * + * * a temporary solution (until we figure out how to deal with * large address spaces more generically) is to pre-flight * the resident page queue (if it's small enough) and develop @@ -908,12 +947,12 @@ BYPASS_COW_COPYIN: * is not a theoretical problem */ - if ((object->resident_page_count < RESIDENT_LIMIT) && - (atop_64(size) > (unsigned)(object->resident_page_count/(8 * MAX_EXTENTS)))) { - vm_page_t next; - vm_object_offset_t start; - vm_object_offset_t end; - vm_object_size_t e_mask; + if ((object->resident_page_count < RESIDENT_LIMIT) && + (atop_64(size) > (unsigned)(object->resident_page_count / (8 * MAX_EXTENTS)))) { + vm_page_t next; + vm_object_offset_t start; + vm_object_offset_t end; + vm_object_size_t e_mask; vm_page_t m; start = offset; @@ -921,60 +960,63 @@ BYPASS_COW_COPYIN: num_of_extents = 0; e_mask = ~((vm_object_size_t)(EXTENT_SIZE - 1)); - m = (vm_page_t) queue_first(&object->memq); + m = (vm_page_t) vm_page_queue_first(&object->memq); - while (!queue_end(&object->memq, (queue_entry_t) m)) { - next = (vm_page_t) queue_next(&m->listq); + while (!vm_page_queue_end(&object->memq, (vm_page_queue_entry_t) m)) { + next = (vm_page_t) vm_page_queue_next(&m->vmp_listq); - if ((m->offset >= start) && (m->offset < end)) { - /* + if ((m->vmp_offset >= start) && (m->vmp_offset < end)) { + /* * this is a page we're interested in * try to fit it into a current extent */ - for (n = 0; n < num_of_extents; n++) { - if ((m->offset & e_mask) == extents[n].e_base) { - /* + for (n = 0; n < num_of_extents; n++) { + if ((m->vmp_offset & e_mask) == extents[n].e_base) { + /* * use (PAGE_SIZE - 1) to determine the * max offset so that we don't wrap if * we're at the last page of the space */ - if (m->offset < extents[n].e_min) - extents[n].e_min = m->offset; - else if ((m->offset + (PAGE_SIZE - 1)) > extents[n].e_max) - extents[n].e_max = m->offset + (PAGE_SIZE - 1); - break; + if (m->vmp_offset < extents[n].e_min) { + extents[n].e_min = m->vmp_offset; + } else if ((m->vmp_offset + (PAGE_SIZE - 1)) > extents[n].e_max) { + extents[n].e_max = m->vmp_offset + (PAGE_SIZE - 1); + } + break; } } if (n == num_of_extents) { - /* + /* * didn't find a current extent that can encompass * this page */ - if (n < MAX_EXTENTS) { - /* - * if we still have room, + if (n < MAX_EXTENTS) { + /* + * if we still have room, * create a new extent */ - extents[n].e_base = m->offset & e_mask; - extents[n].e_min = m->offset; - extents[n].e_max = m->offset + (PAGE_SIZE - 1); + extents[n].e_base = m->vmp_offset & e_mask; + extents[n].e_min = m->vmp_offset; + extents[n].e_max = m->vmp_offset + (PAGE_SIZE - 1); num_of_extents++; } else { /* * no room to create a new extent... * fall back to a single extent based - * on the min and max page offsets + * on the min and max page offsets * we find in the range we're interested in... * first, look through the extent list and * develop the overall min and max for the * pages we've looked at up to this point - */ - for (n = 1; n < num_of_extents; n++) { - if (extents[n].e_min < extents[0].e_min) - extents[0].e_min = extents[n].e_min; - if (extents[n].e_max > extents[0].e_max) - extents[0].e_max = extents[n].e_max; + */ + for (n = 1; n < num_of_extents; n++) { + if (extents[n].e_min < extents[0].e_min) { + extents[0].e_min = extents[n].e_min; + } + if (extents[n].e_max > extents[0].e_max) { + extents[0].e_max = extents[n].e_max; + } } /* * now setup to run through the remaining pages @@ -997,129 +1039,47 @@ BYPASS_COW_COPYIN: m = next; } } else { - extents[0].e_min = offset; + extents[0].e_min = offset; extents[0].e_max = offset + (size - 1); num_of_extents = 1; } for (n = 0; n < num_of_extents; n++) { - if (vm_object_update_extent(object, extents[n].e_min, extents[n].e_max, resid_offset, io_errno, - should_flush, should_return, should_iosync, protection)) - data_returned = TRUE; - } - return (data_returned); -} - - -/* - * Routine: memory_object_synchronize_completed [user interface] - * - * Tell kernel that previously synchronized data - * (memory_object_synchronize) has been queue or placed on the - * backing storage. - * - * Note: there may be multiple synchronize requests for a given - * memory object outstanding but they will not overlap. - */ - -kern_return_t -memory_object_synchronize_completed( - memory_object_control_t control, - memory_object_offset_t offset, - vm_offset_t length) -{ - vm_object_t object; - msync_req_t msr; - - object = memory_object_control_to_vm_object(control); - - XPR(XPR_MEMORY_OBJECT, - "m_o_sync_completed, object 0x%X, offset 0x%X length 0x%X\n", - (integer_t)object, offset, length, 0, 0); - - /* - * Look for bogus arguments - */ - - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); - - vm_object_lock(object); - -/* - * search for sync request structure - */ - queue_iterate(&object->msr_q, msr, msync_req_t, msr_q) { - if (msr->offset == offset && msr->length == length) { - queue_remove(&object->msr_q, msr, msync_req_t, msr_q); - break; + if (vm_object_update_extent(object, extents[n].e_min, extents[n].e_max, resid_offset, io_errno, + should_flush, should_return, should_iosync, protection)) { + data_returned = TRUE; } - }/* queue_iterate */ - - if (queue_end(&object->msr_q, (queue_entry_t)msr)) { - vm_object_unlock(object); - return KERN_INVALID_ARGUMENT; } + return data_returned; +} - msr_lock(msr); - vm_object_unlock(object); - msr->flag = VM_MSYNC_DONE; - msr_unlock(msr); - thread_wakeup((event_t) msr); - - return KERN_SUCCESS; -}/* memory_object_synchronize_completed */ static kern_return_t vm_object_set_attributes_common( - vm_object_t object, - boolean_t may_cache, - memory_object_copy_strategy_t copy_strategy, - boolean_t temporary, - memory_object_cluster_size_t cluster_size, - boolean_t silent_overwrite, - boolean_t advisory_pageout) + vm_object_t object, + boolean_t may_cache, + memory_object_copy_strategy_t copy_strategy) { - boolean_t object_became_ready; - - XPR(XPR_MEMORY_OBJECT, - "m_o_set_attr_com, object 0x%X flg %x strat %d\n", - (integer_t)object, (may_cache&1)|((temporary&1)<1), copy_strategy, 0, 0); + boolean_t object_became_ready; - if (object == VM_OBJECT_NULL) - return(KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } /* * Verify the attributes of importance */ - switch(copy_strategy) { - case MEMORY_OBJECT_COPY_NONE: - case MEMORY_OBJECT_COPY_DELAY: - break; - default: - return(KERN_INVALID_ARGUMENT); + switch (copy_strategy) { + case MEMORY_OBJECT_COPY_NONE: + case MEMORY_OBJECT_COPY_DELAY: + break; + default: + return KERN_INVALID_ARGUMENT; } -#if !ADVISORY_PAGEOUT - if (silent_overwrite || advisory_pageout) - return(KERN_INVALID_ARGUMENT); - -#endif /* !ADVISORY_PAGEOUT */ - if (may_cache) + if (may_cache) { may_cache = TRUE; - if (temporary) - temporary = TRUE; - if (cluster_size != 0) { - int pages_per_cluster; - pages_per_cluster = atop_32(cluster_size); - /* - * Cluster size must be integral multiple of page size, - * and be a power of 2 number of pages. - */ - if ((cluster_size & (PAGE_SIZE-1)) || - ((pages_per_cluster-1) & pages_per_cluster)) - return KERN_INVALID_ARGUMENT; } vm_object_lock(object); @@ -1131,15 +1091,6 @@ vm_object_set_attributes_common( object_became_ready = !object->pager_ready; object->copy_strategy = copy_strategy; object->can_persist = may_cache; - object->temporary = temporary; - object->silent_overwrite = silent_overwrite; - object->advisory_pageout = advisory_pageout; - if (cluster_size == 0) - cluster_size = PAGE_SIZE; - object->cluster_size = cluster_size; - - assert(cluster_size >= PAGE_SIZE && - cluster_size % PAGE_SIZE == 0); /* * Wake up anyone waiting for the ready attribute @@ -1153,191 +1104,183 @@ vm_object_set_attributes_common( vm_object_unlock(object); - return(KERN_SUCCESS); + return KERN_SUCCESS; +} + + +kern_return_t +memory_object_synchronize_completed( + __unused memory_object_control_t control, + __unused memory_object_offset_t offset, + __unused memory_object_size_t length) +{ + panic("memory_object_synchronize_completed no longer supported\n"); + return KERN_FAILURE; } + /* * Set the memory object attribute as provided. * - * XXX This routine cannot be completed until the vm_msync, clean + * XXX This routine cannot be completed until the vm_msync, clean * in place, and cluster work is completed. See ifdef notyet * below and note that vm_object_set_attributes_common() * may have to be expanded. */ kern_return_t memory_object_change_attributes( - memory_object_control_t control, - memory_object_flavor_t flavor, - memory_object_info_t attributes, - mach_msg_type_number_t count) + memory_object_control_t control, + memory_object_flavor_t flavor, + memory_object_info_t attributes, + mach_msg_type_number_t count) { - vm_object_t object; - kern_return_t result = KERN_SUCCESS; - boolean_t temporary; - boolean_t may_cache; - boolean_t invalidate; - memory_object_cluster_size_t cluster_size; - memory_object_copy_strategy_t copy_strategy; - boolean_t silent_overwrite; - boolean_t advisory_pageout; + vm_object_t object; + kern_return_t result = KERN_SUCCESS; + boolean_t may_cache; + boolean_t invalidate; + memory_object_copy_strategy_t copy_strategy; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } vm_object_lock(object); - temporary = object->temporary; may_cache = object->can_persist; copy_strategy = object->copy_strategy; - silent_overwrite = object->silent_overwrite; - advisory_pageout = object->advisory_pageout; #if notyet invalidate = object->invalidate; #endif - cluster_size = object->cluster_size; - vm_object_unlock(object); + vm_object_unlock(object); switch (flavor) { - case OLD_MEMORY_OBJECT_BEHAVIOR_INFO: - { - old_memory_object_behave_info_t behave; + case OLD_MEMORY_OBJECT_BEHAVIOR_INFO: + { + old_memory_object_behave_info_t behave; - if (count != OLD_MEMORY_OBJECT_BEHAVE_INFO_COUNT) { - result = KERN_INVALID_ARGUMENT; - break; - } + if (count != OLD_MEMORY_OBJECT_BEHAVE_INFO_COUNT) { + result = KERN_INVALID_ARGUMENT; + break; + } - behave = (old_memory_object_behave_info_t) attributes; + behave = (old_memory_object_behave_info_t) attributes; - temporary = behave->temporary; invalidate = behave->invalidate; copy_strategy = behave->copy_strategy; break; - } + } - case MEMORY_OBJECT_BEHAVIOR_INFO: - { - memory_object_behave_info_t behave; + case MEMORY_OBJECT_BEHAVIOR_INFO: + { + memory_object_behave_info_t behave; - if (count != MEMORY_OBJECT_BEHAVE_INFO_COUNT) { - result = KERN_INVALID_ARGUMENT; - break; - } + if (count != MEMORY_OBJECT_BEHAVE_INFO_COUNT) { + result = KERN_INVALID_ARGUMENT; + break; + } - behave = (memory_object_behave_info_t) attributes; + behave = (memory_object_behave_info_t) attributes; - temporary = behave->temporary; invalidate = behave->invalidate; copy_strategy = behave->copy_strategy; - silent_overwrite = behave->silent_overwrite; - advisory_pageout = behave->advisory_pageout; break; - } + } - case MEMORY_OBJECT_PERFORMANCE_INFO: - { - memory_object_perf_info_t perf; + case MEMORY_OBJECT_PERFORMANCE_INFO: + { + memory_object_perf_info_t perf; - if (count != MEMORY_OBJECT_PERF_INFO_COUNT) { - result = KERN_INVALID_ARGUMENT; - break; - } + if (count != MEMORY_OBJECT_PERF_INFO_COUNT) { + result = KERN_INVALID_ARGUMENT; + break; + } - perf = (memory_object_perf_info_t) attributes; + perf = (memory_object_perf_info_t) attributes; may_cache = perf->may_cache; - cluster_size = round_page_32(perf->cluster_size); break; - } + } - case OLD_MEMORY_OBJECT_ATTRIBUTE_INFO: - { - old_memory_object_attr_info_t attr; + case OLD_MEMORY_OBJECT_ATTRIBUTE_INFO: + { + old_memory_object_attr_info_t attr; - if (count != OLD_MEMORY_OBJECT_ATTR_INFO_COUNT) { - result = KERN_INVALID_ARGUMENT; - break; - } + if (count != OLD_MEMORY_OBJECT_ATTR_INFO_COUNT) { + result = KERN_INVALID_ARGUMENT; + break; + } attr = (old_memory_object_attr_info_t) attributes; - may_cache = attr->may_cache; - copy_strategy = attr->copy_strategy; - cluster_size = page_size; + may_cache = attr->may_cache; + copy_strategy = attr->copy_strategy; break; - } + } - case MEMORY_OBJECT_ATTRIBUTE_INFO: - { - memory_object_attr_info_t attr; + case MEMORY_OBJECT_ATTRIBUTE_INFO: + { + memory_object_attr_info_t attr; - if (count != MEMORY_OBJECT_ATTR_INFO_COUNT) { - result = KERN_INVALID_ARGUMENT; - break; - } + if (count != MEMORY_OBJECT_ATTR_INFO_COUNT) { + result = KERN_INVALID_ARGUMENT; + break; + } attr = (memory_object_attr_info_t) attributes; copy_strategy = attr->copy_strategy; - may_cache = attr->may_cache_object; - cluster_size = attr->cluster_size; - temporary = attr->temporary; + may_cache = attr->may_cache_object; break; - } + } - default: + default: result = KERN_INVALID_ARGUMENT; break; } - if (result != KERN_SUCCESS) - return(result); + if (result != KERN_SUCCESS) { + return result; + } if (copy_strategy == MEMORY_OBJECT_COPY_TEMPORARY) { copy_strategy = MEMORY_OBJECT_COPY_DELAY; - temporary = TRUE; - } else { - temporary = FALSE; } /* * XXX may_cache may become a tri-valued variable to handle * XXX uncache if not in use. */ - return (vm_object_set_attributes_common(object, - may_cache, - copy_strategy, - temporary, - cluster_size, - silent_overwrite, - advisory_pageout)); + return vm_object_set_attributes_common(object, + may_cache, + copy_strategy); } kern_return_t memory_object_get_attributes( - memory_object_control_t control, - memory_object_flavor_t flavor, - memory_object_info_t attributes, /* pointer to OUT array */ - mach_msg_type_number_t *count) /* IN/OUT */ + memory_object_control_t control, + memory_object_flavor_t flavor, + memory_object_info_t attributes, /* pointer to OUT array */ + mach_msg_type_number_t *count) /* IN/OUT */ { - kern_return_t ret = KERN_SUCCESS; - vm_object_t object; + kern_return_t ret = KERN_SUCCESS; + vm_object_t object; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } - vm_object_lock(object); + vm_object_lock(object); switch (flavor) { - case OLD_MEMORY_OBJECT_BEHAVIOR_INFO: - { - old_memory_object_behave_info_t behave; + case OLD_MEMORY_OBJECT_BEHAVIOR_INFO: + { + old_memory_object_behave_info_t behave; if (*count < OLD_MEMORY_OBJECT_BEHAVE_INFO_COUNT) { ret = KERN_INVALID_ARGUMENT; @@ -1346,43 +1289,43 @@ memory_object_get_attributes( behave = (old_memory_object_behave_info_t) attributes; behave->copy_strategy = object->copy_strategy; - behave->temporary = object->temporary; -#if notyet /* remove when vm_msync complies and clean in place fini */ - behave->invalidate = object->invalidate; + behave->temporary = FALSE; +#if notyet /* remove when vm_msync complies and clean in place fini */ + behave->invalidate = object->invalidate; #else behave->invalidate = FALSE; #endif *count = OLD_MEMORY_OBJECT_BEHAVE_INFO_COUNT; break; - } + } - case MEMORY_OBJECT_BEHAVIOR_INFO: - { - memory_object_behave_info_t behave; + case MEMORY_OBJECT_BEHAVIOR_INFO: + { + memory_object_behave_info_t behave; if (*count < MEMORY_OBJECT_BEHAVE_INFO_COUNT) { - ret = KERN_INVALID_ARGUMENT; - break; - } - - behave = (memory_object_behave_info_t) attributes; - behave->copy_strategy = object->copy_strategy; - behave->temporary = object->temporary; -#if notyet /* remove when vm_msync complies and clean in place fini */ - behave->invalidate = object->invalidate; + ret = KERN_INVALID_ARGUMENT; + break; + } + + behave = (memory_object_behave_info_t) attributes; + behave->copy_strategy = object->copy_strategy; + behave->temporary = FALSE; +#if notyet /* remove when vm_msync complies and clean in place fini */ + behave->invalidate = object->invalidate; #else behave->invalidate = FALSE; #endif - behave->advisory_pageout = object->advisory_pageout; - behave->silent_overwrite = object->silent_overwrite; - *count = MEMORY_OBJECT_BEHAVE_INFO_COUNT; + behave->advisory_pageout = FALSE; + behave->silent_overwrite = FALSE; + *count = MEMORY_OBJECT_BEHAVE_INFO_COUNT; break; - } + } - case MEMORY_OBJECT_PERFORMANCE_INFO: - { - memory_object_perf_info_t perf; + case MEMORY_OBJECT_PERFORMANCE_INFO: + { + memory_object_perf_info_t perf; if (*count < MEMORY_OBJECT_PERF_INFO_COUNT) { ret = KERN_INVALID_ARGUMENT; @@ -1390,73 +1333,74 @@ memory_object_get_attributes( } perf = (memory_object_perf_info_t) attributes; - perf->cluster_size = object->cluster_size; + perf->cluster_size = PAGE_SIZE; perf->may_cache = object->can_persist; *count = MEMORY_OBJECT_PERF_INFO_COUNT; break; - } + } - case OLD_MEMORY_OBJECT_ATTRIBUTE_INFO: - { - old_memory_object_attr_info_t attr; + case OLD_MEMORY_OBJECT_ATTRIBUTE_INFO: + { + old_memory_object_attr_info_t attr; - if (*count < OLD_MEMORY_OBJECT_ATTR_INFO_COUNT) { - ret = KERN_INVALID_ARGUMENT; - break; - } + if (*count < OLD_MEMORY_OBJECT_ATTR_INFO_COUNT) { + ret = KERN_INVALID_ARGUMENT; + break; + } - attr = (old_memory_object_attr_info_t) attributes; - attr->may_cache = object->can_persist; - attr->copy_strategy = object->copy_strategy; + attr = (old_memory_object_attr_info_t) attributes; + attr->may_cache = object->can_persist; + attr->copy_strategy = object->copy_strategy; - *count = OLD_MEMORY_OBJECT_ATTR_INFO_COUNT; - break; - } + *count = OLD_MEMORY_OBJECT_ATTR_INFO_COUNT; + break; + } - case MEMORY_OBJECT_ATTRIBUTE_INFO: - { - memory_object_attr_info_t attr; + case MEMORY_OBJECT_ATTRIBUTE_INFO: + { + memory_object_attr_info_t attr; - if (*count < MEMORY_OBJECT_ATTR_INFO_COUNT) { - ret = KERN_INVALID_ARGUMENT; - break; - } + if (*count < MEMORY_OBJECT_ATTR_INFO_COUNT) { + ret = KERN_INVALID_ARGUMENT; + break; + } - attr = (memory_object_attr_info_t) attributes; - attr->copy_strategy = object->copy_strategy; - attr->cluster_size = object->cluster_size; - attr->may_cache_object = object->can_persist; - attr->temporary = object->temporary; + attr = (memory_object_attr_info_t) attributes; + attr->copy_strategy = object->copy_strategy; + attr->cluster_size = PAGE_SIZE; + attr->may_cache_object = object->can_persist; + attr->temporary = FALSE; - *count = MEMORY_OBJECT_ATTR_INFO_COUNT; - break; - } + *count = MEMORY_OBJECT_ATTR_INFO_COUNT; + break; + } - default: + default: ret = KERN_INVALID_ARGUMENT; break; } - vm_object_unlock(object); + vm_object_unlock(object); - return(ret); + return ret; } kern_return_t memory_object_iopl_request( - ipc_port_t port, - memory_object_offset_t offset, - upl_size_t *upl_size, - upl_t *upl_ptr, - upl_page_info_array_t user_page_list, - unsigned int *page_list_count, - int *flags) + ipc_port_t port, + memory_object_offset_t offset, + upl_size_t *upl_size, + upl_t *upl_ptr, + upl_page_info_array_t user_page_list, + unsigned int *page_list_count, + upl_control_flags_t *flags, + vm_tag_t tag) { - vm_object_t object; - kern_return_t ret; - int caller_flags; + vm_object_t object; + kern_return_t ret; + upl_control_flags_t caller_flags; caller_flags = *flags; @@ -1469,94 +1413,73 @@ memory_object_iopl_request( } if (ip_kotype(port) == IKOT_NAMED_ENTRY) { - vm_named_entry_t named_entry; + vm_named_entry_t named_entry; - named_entry = (vm_named_entry_t)port->ip_kobject; + named_entry = (vm_named_entry_t) ip_get_kobject(port); /* a few checks to make sure user is obeying rules */ - if(*upl_size == 0) { - if(offset >= named_entry->size) - return(KERN_INVALID_RIGHT); - *upl_size = named_entry->size - offset; + if (*upl_size == 0) { + if (offset >= named_entry->size) { + return KERN_INVALID_RIGHT; + } + *upl_size = (upl_size_t)(named_entry->size - offset); + if (*upl_size != named_entry->size - offset) { + return KERN_INVALID_ARGUMENT; + } } - if(caller_flags & UPL_COPYOUT_FROM) { - if((named_entry->protection & VM_PROT_READ) - != VM_PROT_READ) { - return(KERN_INVALID_RIGHT); + if (caller_flags & UPL_COPYOUT_FROM) { + if ((named_entry->protection & VM_PROT_READ) + != VM_PROT_READ) { + return KERN_INVALID_RIGHT; } } else { - if((named_entry->protection & - (VM_PROT_READ | VM_PROT_WRITE)) - != (VM_PROT_READ | VM_PROT_WRITE)) { - return(KERN_INVALID_RIGHT); + if ((named_entry->protection & + (VM_PROT_READ | VM_PROT_WRITE)) + != (VM_PROT_READ | VM_PROT_WRITE)) { + return KERN_INVALID_RIGHT; } } - if(named_entry->size < (offset + *upl_size)) - return(KERN_INVALID_ARGUMENT); + if (named_entry->size < (offset + *upl_size)) { + return KERN_INVALID_ARGUMENT; + } /* the callers parameter offset is defined to be the */ /* offset from beginning of named entry offset in object */ offset = offset + named_entry->offset; + offset += named_entry->data_offset; - if(named_entry->is_sub_map) - return (KERN_INVALID_ARGUMENT); - - named_entry_lock(named_entry); - - if (named_entry->is_pager) { - object = vm_object_enter(named_entry->backing.pager, - named_entry->offset + named_entry->size, - named_entry->internal, - FALSE, - FALSE); - if (object == VM_OBJECT_NULL) { - named_entry_unlock(named_entry); - return(KERN_INVALID_OBJECT); - } + if (named_entry->is_sub_map || + named_entry->is_copy) { + return KERN_INVALID_ARGUMENT; + } + if (!named_entry->is_object) { + return KERN_INVALID_ARGUMENT; + } - /* JMM - drop reference on pager here? */ + named_entry_lock(named_entry); - /* create an extra reference for the named entry */ - vm_object_lock(object); - vm_object_reference_locked(object); - named_entry->backing.object = object; - named_entry->is_pager = FALSE; - named_entry_unlock(named_entry); - - /* wait for object to be ready */ - while (!object->pager_ready) { - vm_object_wait(object, - VM_OBJECT_EVENT_PAGER_READY, - THREAD_UNINT); - vm_object_lock(object); - } - vm_object_unlock(object); - } else { - /* This is the case where we are going to map */ - /* an already mapped object. If the object is */ - /* not ready it is internal. An external */ - /* object cannot be mapped until it is ready */ - /* we can therefore avoid the ready check */ - /* in this case. */ - object = named_entry->backing.object; - vm_object_reference(object); - named_entry_unlock(named_entry); + object = vm_named_entry_to_vm_object(named_entry); + assert(object != VM_OBJECT_NULL); + vm_object_reference(object); + named_entry_unlock(named_entry); + } else if (ip_kotype(port) == IKOT_MEM_OBJ_CONTROL) { + memory_object_control_t control; + control = (memory_object_control_t) port; + if (control == NULL) { + return KERN_INVALID_ARGUMENT; } - } else { - memory_object_control_t control; - control = (memory_object_control_t)port->ip_kobject; - if (control == NULL) - return (KERN_INVALID_ARGUMENT); object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } vm_object_reference(object); + } else { + return KERN_INVALID_ARGUMENT; + } + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; } - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); if (!object->private) { - if (*upl_size > (MAX_UPL_TRANSFER*PAGE_SIZE)) - *upl_size = (MAX_UPL_TRANSFER*PAGE_SIZE); if (object->phys_contiguous) { *flags = UPL_PHYS_CONTIG; } else { @@ -1567,17 +1490,18 @@ memory_object_iopl_request( } ret = vm_object_iopl_request(object, - offset, - *upl_size, - upl_ptr, - user_page_list, - page_list_count, - caller_flags); + offset, + *upl_size, + upl_ptr, + user_page_list, + page_list_count, + caller_flags, + tag); vm_object_deallocate(object); return ret; } -/* +/* * Routine: memory_object_upl_request [interface] * Purpose: * Cause the population of a portion of a vm_object. @@ -1588,30 +1512,35 @@ memory_object_iopl_request( kern_return_t memory_object_upl_request( - memory_object_control_t control, - memory_object_offset_t offset, - upl_size_t size, - upl_t *upl_ptr, - upl_page_info_array_t user_page_list, - unsigned int *page_list_count, - int cntrl_flags) + memory_object_control_t control, + memory_object_offset_t offset, + upl_size_t size, + upl_t *upl_ptr, + upl_page_info_array_t user_page_list, + unsigned int *page_list_count, + int cntrl_flags, + int tag) { - vm_object_t object; + vm_object_t object; + vm_tag_t vmtag = (vm_tag_t)tag; + assert(vmtag == tag); object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_TERMINATED; + } return vm_object_upl_request(object, - offset, - size, - upl_ptr, - user_page_list, - page_list_count, - cntrl_flags); + offset, + size, + upl_ptr, + user_page_list, + page_list_count, + (upl_control_flags_t)(unsigned int) cntrl_flags, + vmtag); } -/* +/* * Routine: memory_object_super_upl_request [interface] * Purpose: * Cause the population of a portion of a vm_object @@ -1625,34 +1554,65 @@ memory_object_upl_request( kern_return_t memory_object_super_upl_request( memory_object_control_t control, - memory_object_offset_t offset, - upl_size_t size, - upl_size_t super_cluster, - upl_t *upl, - upl_page_info_t *user_page_list, - unsigned int *page_list_count, - int cntrl_flags) + memory_object_offset_t offset, + upl_size_t size, + upl_size_t super_cluster, + upl_t *upl, + upl_page_info_t *user_page_list, + unsigned int *page_list_count, + int cntrl_flags, + int tag) { - vm_object_t object; + vm_object_t object; + vm_tag_t vmtag = (vm_tag_t)tag; + assert(vmtag == tag); object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } return vm_object_super_upl_request(object, - offset, - size, - super_cluster, - upl, - user_page_list, - page_list_count, - cntrl_flags); + offset, + size, + super_cluster, + upl, + user_page_list, + page_list_count, + (upl_control_flags_t)(unsigned int) cntrl_flags, + vmtag); } -int vm_stat_discard_cleared_reply = 0; -int vm_stat_discard_cleared_unset = 0; -int vm_stat_discard_cleared_too_late = 0; +kern_return_t +memory_object_cluster_size( + memory_object_control_t control, + memory_object_offset_t *start, + vm_size_t *length, + uint32_t *io_streaming, + memory_object_fault_info_t mo_fault_info) +{ + vm_object_t object; + vm_object_fault_info_t fault_info; + + object = memory_object_control_to_vm_object(control); + if (object == VM_OBJECT_NULL || object->paging_offset > *start) { + return KERN_INVALID_ARGUMENT; + } + + *start -= object->paging_offset; + + fault_info = (vm_object_fault_info_t)(uintptr_t) mo_fault_info; + vm_object_cluster_size(object, + (vm_object_offset_t *)start, + length, + fault_info, + io_streaming); + + *start += object->paging_offset; + + return KERN_SUCCESS; +} /* @@ -1665,30 +1625,53 @@ int vm_stat_discard_cleared_too_late = 0; */ kern_return_t host_default_memory_manager( - host_priv_t host_priv, - memory_object_default_t *default_manager, - memory_object_cluster_size_t cluster_size) + host_priv_t host_priv, + memory_object_default_t *default_manager, + __unused memory_object_cluster_size_t cluster_size) { memory_object_default_t current_manager; memory_object_default_t new_manager; memory_object_default_t returned_manager; + kern_return_t result = KERN_SUCCESS; - if (host_priv == HOST_PRIV_NULL) - return(KERN_INVALID_HOST); + if (host_priv == HOST_PRIV_NULL) { + return KERN_INVALID_HOST; + } assert(host_priv == &realhost); new_manager = *default_manager; - mutex_lock(&memory_manager_default_lock); + lck_mtx_lock(&memory_manager_default_lock); current_manager = memory_manager_default; + returned_manager = MEMORY_OBJECT_DEFAULT_NULL; if (new_manager == MEMORY_OBJECT_DEFAULT_NULL) { /* * Retrieve the current value. */ - memory_object_default_reference(current_manager); returned_manager = current_manager; + memory_object_default_reference(returned_manager); } else { + /* + * Only allow the kernel to change the value. + */ + extern task_t kernel_task; + if (current_task() != kernel_task) { + result = KERN_NO_ACCESS; + goto out; + } + + /* + * If this is the first non-null manager, start + * up the internal pager support. + */ + if (current_manager == MEMORY_OBJECT_DEFAULT_NULL) { + result = vm_pageout_internal_start(); + if (result != KERN_SUCCESS) { + goto out; + } + } + /* * Retrieve the current value, * and replace it with the supplied value. @@ -1696,33 +1679,31 @@ host_default_memory_manager( * but we have to take a reference on the new * one. */ - returned_manager = current_manager; memory_manager_default = new_manager; memory_object_default_reference(new_manager); - if (cluster_size % PAGE_SIZE != 0) { -#if 0 - mutex_unlock(&memory_manager_default_lock); - return KERN_INVALID_ARGUMENT; -#else - cluster_size = round_page_32(cluster_size); -#endif - } - memory_manager_default_cluster = cluster_size; - /* * In case anyone's been waiting for a memory * manager to be established, wake them up. */ thread_wakeup((event_t) &memory_manager_default); - } - mutex_unlock(&memory_manager_default_lock); + /* + * Now that we have a default pager for anonymous memory, + * reactivate all the throttled pages (i.e. dirty pages with + * no pager). + */ + if (current_manager == MEMORY_OBJECT_DEFAULT_NULL) { + vm_page_reactivate_all_throttled(); + } + } +out: + lck_mtx_unlock(&memory_manager_default_lock); *default_manager = returned_manager; - return(KERN_SUCCESS); + return result; } /* @@ -1734,25 +1715,24 @@ host_default_memory_manager( */ __private_extern__ memory_object_default_t -memory_manager_default_reference( - memory_object_cluster_size_t *cluster_size) +memory_manager_default_reference(void) { memory_object_default_t current_manager; - mutex_lock(&memory_manager_default_lock); + lck_mtx_lock(&memory_manager_default_lock); current_manager = memory_manager_default; while (current_manager == MEMORY_OBJECT_DEFAULT_NULL) { wait_result_t res; - res = thread_sleep_mutex((event_t) &memory_manager_default, - &memory_manager_default_lock, - THREAD_UNINT); + res = lck_mtx_sleep(&memory_manager_default_lock, + LCK_SLEEP_DEFAULT, + (event_t) &memory_manager_default, + THREAD_UNINT); assert(res == THREAD_AWAKENED); current_manager = memory_manager_default; } memory_object_default_reference(current_manager); - *cluster_size = memory_manager_default_cluster; - mutex_unlock(&memory_manager_default_lock); + lck_mtx_unlock(&memory_manager_default_lock); return current_manager; } @@ -1774,344 +1754,316 @@ memory_manager_default_check(void) { memory_object_default_t current; - mutex_lock(&memory_manager_default_lock); + lck_mtx_lock(&memory_manager_default_lock); current = memory_manager_default; if (current == MEMORY_OBJECT_DEFAULT_NULL) { - static boolean_t logged; /* initialized to 0 */ - boolean_t complain = !logged; + static boolean_t logged; /* initialized to 0 */ + boolean_t complain = !logged; logged = TRUE; - mutex_unlock(&memory_manager_default_lock); - if (complain) + lck_mtx_unlock(&memory_manager_default_lock); + if (complain) { printf("Warning: No default memory manager\n"); - return(KERN_FAILURE); + } + return KERN_FAILURE; } else { - mutex_unlock(&memory_manager_default_lock); - return(KERN_SUCCESS); + lck_mtx_unlock(&memory_manager_default_lock); + return KERN_SUCCESS; } } -__private_extern__ void -memory_manager_default_init(void) -{ - memory_manager_default = MEMORY_OBJECT_DEFAULT_NULL; - mutex_init(&memory_manager_default_lock, 0); -} - - - /* Allow manipulation of individual page state. This is actually part of */ /* the UPL regimen but takes place on the object rather than on a UPL */ kern_return_t memory_object_page_op( - memory_object_control_t control, - memory_object_offset_t offset, - int ops, - ppnum_t *phys_entry, - int *flags) + memory_object_control_t control, + memory_object_offset_t offset, + int ops, + ppnum_t *phys_entry, + int *flags) { - vm_object_t object; - vm_page_t dst_page; - + vm_object_t object; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } - vm_object_lock(object); + return vm_object_page_op(object, offset, ops, phys_entry, flags); +} - if(ops & UPL_POP_PHYSICAL) { - if(object->phys_contiguous) { - if (phys_entry) { - *phys_entry = (ppnum_t) - (object->shadow_offset >> 12); - } - vm_object_unlock(object); - return KERN_SUCCESS; - } else { - vm_object_unlock(object); - return KERN_INVALID_OBJECT; - } - } - if(object->phys_contiguous) { - vm_object_unlock(object); - return KERN_INVALID_OBJECT; +/* + * memory_object_range_op offers performance enhancement over + * memory_object_page_op for page_op functions which do not require page + * level state to be returned from the call. Page_op was created to provide + * a low-cost alternative to page manipulation via UPLs when only a single + * page was involved. The range_op call establishes the ability in the _op + * family of functions to work on multiple pages where the lack of page level + * state handling allows the caller to avoid the overhead of the upl structures. + */ + +kern_return_t +memory_object_range_op( + memory_object_control_t control, + memory_object_offset_t offset_beg, + memory_object_offset_t offset_end, + int ops, + int *range) +{ + vm_object_t object; + + object = memory_object_control_to_vm_object(control); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; } - while(TRUE) { - if((dst_page = vm_page_lookup(object,offset)) == VM_PAGE_NULL) { - vm_object_unlock(object); - return KERN_FAILURE; - } + return vm_object_range_op(object, + offset_beg, + offset_end, + ops, + (uint32_t *) range); +} - /* Sync up on getting the busy bit */ - if((dst_page->busy || dst_page->cleaning) && - (((ops & UPL_POP_SET) && - (ops & UPL_POP_BUSY)) || (ops & UPL_POP_DUMP))) { - /* someone else is playing with the page, we will */ - /* have to wait */ - PAGE_SLEEP(object, dst_page, THREAD_UNINT); - continue; - } - if (ops & UPL_POP_DUMP) { - vm_page_lock_queues(); +void +memory_object_mark_used( + memory_object_control_t control) +{ + vm_object_t object; - if (dst_page->no_isync == FALSE) - pmap_disconnect(dst_page->phys_page); - vm_page_free(dst_page); + if (control == NULL) { + return; + } - vm_page_unlock_queues(); - break; - } + object = memory_object_control_to_vm_object(control); - if (flags) { - *flags = 0; + if (object != VM_OBJECT_NULL) { + vm_object_cache_remove(object); + } +} - /* Get the condition of flags before requested ops */ - /* are undertaken */ - if(dst_page->dirty) *flags |= UPL_POP_DIRTY; - if(dst_page->pageout) *flags |= UPL_POP_PAGEOUT; - if(dst_page->precious) *flags |= UPL_POP_PRECIOUS; - if(dst_page->absent) *flags |= UPL_POP_ABSENT; - if(dst_page->busy) *flags |= UPL_POP_BUSY; - } +void +memory_object_mark_unused( + memory_object_control_t control, + __unused boolean_t rage) +{ + vm_object_t object; - /* The caller should have made a call either contingent with */ - /* or prior to this call to set UPL_POP_BUSY */ - if(ops & UPL_POP_SET) { - /* The protection granted with this assert will */ - /* not be complete. If the caller violates the */ - /* convention and attempts to change page state */ - /* without first setting busy we may not see it */ - /* because the page may already be busy. However */ - /* if such violations occur we will assert sooner */ - /* or later. */ - assert(dst_page->busy || (ops & UPL_POP_BUSY)); - if (ops & UPL_POP_DIRTY) dst_page->dirty = TRUE; - if (ops & UPL_POP_PAGEOUT) dst_page->pageout = TRUE; - if (ops & UPL_POP_PRECIOUS) dst_page->precious = TRUE; - if (ops & UPL_POP_ABSENT) dst_page->absent = TRUE; - if (ops & UPL_POP_BUSY) dst_page->busy = TRUE; - } + if (control == NULL) { + return; + } - if(ops & UPL_POP_CLR) { - assert(dst_page->busy); - if (ops & UPL_POP_DIRTY) dst_page->dirty = FALSE; - if (ops & UPL_POP_PAGEOUT) dst_page->pageout = FALSE; - if (ops & UPL_POP_PRECIOUS) dst_page->precious = FALSE; - if (ops & UPL_POP_ABSENT) dst_page->absent = FALSE; - if (ops & UPL_POP_BUSY) { - dst_page->busy = FALSE; - PAGE_WAKEUP(dst_page); - } - } + object = memory_object_control_to_vm_object(control); - if (dst_page->encrypted) { - /* - * ENCRYPTED SWAP: - * We need to decrypt this encrypted page before the - * caller can access its contents. - * But if the caller really wants to access the page's - * contents, they have to keep the page "busy". - * Otherwise, the page could get recycled or re-encrypted - * at any time. - */ - if ((ops & UPL_POP_SET) && (ops & UPL_POP_BUSY) && - dst_page->busy) { - /* - * The page is stable enough to be accessed by - * the caller, so make sure its contents are - * not encrypted. - */ - vm_page_decrypt(dst_page, 0); - } else { - /* - * The page is not busy, so don't bother - * decrypting it, since anything could - * happen to it between now and when the - * caller wants to access it. - * We should not give the caller access - * to this page. - */ - assert(!phys_entry); - } - } + if (object != VM_OBJECT_NULL) { + vm_object_cache_add(object); + } +} - if (phys_entry) { - /* - * The physical page number will remain valid - * only if the page is kept busy. - * ENCRYPTED SWAP: make sure we don't let the - * caller access an encrypted page. - */ - assert(dst_page->busy); - assert(!dst_page->encrypted); - *phys_entry = dst_page->phys_page; - } +void +memory_object_mark_io_tracking( + memory_object_control_t control) +{ + vm_object_t object; - break; + if (control == NULL) { + return; } + object = memory_object_control_to_vm_object(control); - vm_object_unlock(object); - return KERN_SUCCESS; - + if (object != VM_OBJECT_NULL) { + vm_object_lock(object); + object->io_tracking = TRUE; + vm_object_unlock(object); + } } -/* - * memory_object_range_op offers performance enhancement over - * memory_object_page_op for page_op functions which do not require page - * level state to be returned from the call. Page_op was created to provide - * a low-cost alternative to page manipulation via UPLs when only a single - * page was involved. The range_op call establishes the ability in the _op - * family of functions to work on multiple pages where the lack of page level - * state handling allows the caller to avoid the overhead of the upl structures. - */ - -kern_return_t -memory_object_range_op( - memory_object_control_t control, - memory_object_offset_t offset_beg, - memory_object_offset_t offset_end, - int ops, - int *range) +void +memory_object_mark_trusted( + memory_object_control_t control) { - memory_object_offset_t offset; - vm_object_t object; - vm_page_t dst_page; + vm_object_t object; - object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); - - if (object->resident_page_count == 0) { - if (range) { - if (ops & UPL_ROP_PRESENT) - *range = 0; - else - *range = offset_end - offset_beg; - } - return KERN_SUCCESS; + if (control == NULL) { + return; } - vm_object_lock(object); + object = memory_object_control_to_vm_object(control); - if (object->phys_contiguous) { + if (object != VM_OBJECT_NULL) { + vm_object_lock(object); + object->pager_trusted = TRUE; vm_object_unlock(object); - return KERN_INVALID_OBJECT; - } - - offset = offset_beg; - - while (offset < offset_end) { - dst_page = vm_page_lookup(object, offset); - if (dst_page != VM_PAGE_NULL) { - if (ops & UPL_ROP_DUMP) { - if (dst_page->busy || dst_page->cleaning) { - /* - * someone else is playing with the - * page, we will have to wait - */ - PAGE_SLEEP(object, - dst_page, THREAD_UNINT); - /* - * need to relook the page up since it's - * state may have changed while we slept - * it might even belong to a different object - * at this point - */ - continue; - } - vm_page_lock_queues(); - - if (dst_page->no_isync == FALSE) - pmap_disconnect(dst_page->phys_page); - vm_page_free(dst_page); + } +} - vm_page_unlock_queues(); - } else if (ops & UPL_ROP_ABSENT) - break; - } else if (ops & UPL_ROP_PRESENT) - break; +#if CONFIG_SECLUDED_MEMORY +void +memory_object_mark_eligible_for_secluded( + memory_object_control_t control, + boolean_t eligible_for_secluded) +{ + vm_object_t object; - offset += PAGE_SIZE; + if (control == NULL) { + return; } - vm_object_unlock(object); + object = memory_object_control_to_vm_object(control); - if (range) - *range = offset - offset_beg; + if (object == VM_OBJECT_NULL) { + return; + } - return KERN_SUCCESS; + vm_object_lock(object); + if (eligible_for_secluded && + secluded_for_filecache && /* global boot-arg */ + !object->eligible_for_secluded) { + object->eligible_for_secluded = TRUE; + vm_page_secluded.eligible_for_secluded += object->resident_page_count; + } else if (!eligible_for_secluded && + object->eligible_for_secluded) { + object->eligible_for_secluded = FALSE; + vm_page_secluded.eligible_for_secluded -= object->resident_page_count; + if (object->resident_page_count) { + /* XXX FBDP TODO: flush pages from secluded queue? */ + // printf("FBDP TODO: flush %d pages from %p from secluded queue\n", object->resident_page_count, object); + } + } + vm_object_unlock(object); } - +#endif /* CONFIG_SECLUDED_MEMORY */ kern_return_t memory_object_pages_resident( - memory_object_control_t control, - boolean_t * has_pages_resident) + memory_object_control_t control, + boolean_t * has_pages_resident) { - vm_object_t object; + vm_object_t object; *has_pages_resident = FALSE; object = memory_object_control_to_vm_object(control); - if (object == VM_OBJECT_NULL) - return (KERN_INVALID_ARGUMENT); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } - if (object->resident_page_count) + if (object->resident_page_count) { *has_pages_resident = TRUE; - - return (KERN_SUCCESS); + } + + return KERN_SUCCESS; } +kern_return_t +memory_object_signed( + memory_object_control_t control, + boolean_t is_signed) +{ + vm_object_t object; -static zone_t mem_obj_control_zone; + object = memory_object_control_to_vm_object(control); + if (object == VM_OBJECT_NULL) { + return KERN_INVALID_ARGUMENT; + } -__private_extern__ void -memory_object_control_bootstrap(void) + vm_object_lock(object); + object->code_signed = is_signed; + vm_object_unlock(object); + + return KERN_SUCCESS; +} + +boolean_t +memory_object_is_signed( + memory_object_control_t control) { - int i; + boolean_t is_signed; + vm_object_t object; - i = (vm_size_t) sizeof (struct memory_object_control); - mem_obj_control_zone = zinit (i, 8192*i, 4096, "mem_obj_control"); - return; + object = memory_object_control_to_vm_object(control); + if (object == VM_OBJECT_NULL) { + return FALSE; + } + + vm_object_lock_shared(object); + is_signed = object->code_signed; + vm_object_unlock(object); + + return is_signed; +} + +boolean_t +memory_object_is_shared_cache( + memory_object_control_t control) +{ + vm_object_t object = VM_OBJECT_NULL; + + object = memory_object_control_to_vm_object(control); + if (object == VM_OBJECT_NULL) { + return FALSE; + } + + return object->object_is_shared_cache; } +static ZONE_DECLARE(mem_obj_control_zone, "mem_obj_control", + sizeof(struct memory_object_control), ZC_NOENCRYPT); + __private_extern__ memory_object_control_t memory_object_control_allocate( - vm_object_t object) -{ + vm_object_t object) +{ memory_object_control_t control; control = (memory_object_control_t)zalloc(mem_obj_control_zone); - if (control != MEMORY_OBJECT_CONTROL_NULL) - control->object = object; - return (control); + if (control != MEMORY_OBJECT_CONTROL_NULL) { + control->moc_object = object; + control->moc_ikot = IKOT_MEM_OBJ_CONTROL; /* fake ip_kotype */ + } + return control; } __private_extern__ void memory_object_control_collapse( - memory_object_control_t control, - vm_object_t object) -{ - assert((control->object != VM_OBJECT_NULL) && - (control->object != object)); - control->object = object; + memory_object_control_t control, + vm_object_t object) +{ + assert((control->moc_object != VM_OBJECT_NULL) && + (control->moc_object != object)); + control->moc_object = object; } __private_extern__ vm_object_t memory_object_control_to_vm_object( - memory_object_control_t control) + memory_object_control_t control) { - if (control == MEMORY_OBJECT_CONTROL_NULL) + if (control == MEMORY_OBJECT_CONTROL_NULL || + control->moc_ikot != IKOT_MEM_OBJ_CONTROL) { return VM_OBJECT_NULL; + } + + return control->moc_object; +} - return (control->object); +__private_extern__ vm_object_t +memory_object_to_vm_object( + memory_object_t mem_obj) +{ + memory_object_control_t mo_control; + + if (mem_obj == MEMORY_OBJECT_NULL) { + return VM_OBJECT_NULL; + } + mo_control = mem_obj->mo_control; + if (mo_control == NULL) { + return VM_OBJECT_NULL; + } + return memory_object_control_to_vm_object(mo_control); } memory_object_control_t convert_port_to_mo_control( - __unused mach_port_t port) + __unused mach_port_t port) { return MEMORY_OBJECT_CONTROL_NULL; } @@ -2119,14 +2071,14 @@ convert_port_to_mo_control( mach_port_t convert_mo_control_to_port( - __unused memory_object_control_t control) + __unused memory_object_control_t control) { return MACH_PORT_NULL; } void memory_object_control_reference( - __unused memory_object_control_t control) + __unused memory_object_control_t control) { return; } @@ -2138,17 +2090,17 @@ memory_object_control_reference( */ void memory_object_control_deallocate( - memory_object_control_t control) + memory_object_control_t control) { zfree(mem_obj_control_zone, control); } void memory_object_control_disable( - memory_object_control_t control) + memory_object_control_t control) { - assert(control->object != VM_OBJECT_NULL); - control->object = VM_OBJECT_NULL; + assert(control->moc_object != VM_OBJECT_NULL); + control->moc_object = VM_OBJECT_NULL; } void @@ -2167,304 +2119,267 @@ memory_object_default_deallocate( memory_object_t convert_port_to_memory_object( - __unused mach_port_t port) + __unused mach_port_t port) { - return (MEMORY_OBJECT_NULL); + return MEMORY_OBJECT_NULL; } mach_port_t convert_memory_object_to_port( - __unused memory_object_t object) + __unused memory_object_t object) { - return (MACH_PORT_NULL); + return MACH_PORT_NULL; } /* Routine memory_object_reference */ -void memory_object_reference( +void +memory_object_reference( memory_object_t memory_object) { - -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - vnode_pager_reference(memory_object); - } else if (memory_object->pager == &device_pager_workaround) { - device_pager_reference(memory_object); - } else -#endif - dp_memory_object_reference(memory_object); + (memory_object->mo_pager_ops->memory_object_reference)( + memory_object); } /* Routine memory_object_deallocate */ -void memory_object_deallocate( +void +memory_object_deallocate( memory_object_t memory_object) { - -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - vnode_pager_deallocate(memory_object); - } else if (memory_object->pager == &device_pager_workaround) { - device_pager_deallocate(memory_object); - } else -#endif - dp_memory_object_deallocate(memory_object); + (memory_object->mo_pager_ops->memory_object_deallocate)( + memory_object); } /* Routine memory_object_init */ -kern_return_t memory_object_init +kern_return_t +memory_object_init ( memory_object_t memory_object, memory_object_control_t memory_control, memory_object_cluster_size_t memory_object_page_size ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_init(memory_object, - memory_control, - memory_object_page_size); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_init(memory_object, - memory_control, - memory_object_page_size); - } else -#endif - return dp_memory_object_init(memory_object, - memory_control, - memory_object_page_size); + return (memory_object->mo_pager_ops->memory_object_init)( + memory_object, + memory_control, + memory_object_page_size); } /* Routine memory_object_terminate */ -kern_return_t memory_object_terminate +kern_return_t +memory_object_terminate ( memory_object_t memory_object ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_terminate(memory_object); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_terminate(memory_object); - } else -#endif - return dp_memory_object_terminate(memory_object); + return (memory_object->mo_pager_ops->memory_object_terminate)( + memory_object); } /* Routine memory_object_data_request */ -kern_return_t memory_object_data_request +kern_return_t +memory_object_data_request ( memory_object_t memory_object, memory_object_offset_t offset, memory_object_cluster_size_t length, - vm_prot_t desired_access + vm_prot_t desired_access, + memory_object_fault_info_t fault_info ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_data_request(memory_object, - offset, - length, - desired_access); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_data_request(memory_object, - offset, - length, - desired_access); - } else -#endif - return dp_memory_object_data_request(memory_object, - offset, - length, - desired_access); + return (memory_object->mo_pager_ops->memory_object_data_request)( + memory_object, + offset, + length, + desired_access, + fault_info); } /* Routine memory_object_data_return */ -kern_return_t memory_object_data_return +kern_return_t +memory_object_data_return ( memory_object_t memory_object, memory_object_offset_t offset, - vm_size_t size, + memory_object_cluster_size_t size, memory_object_offset_t *resid_offset, - int *io_error, + int *io_error, boolean_t dirty, boolean_t kernel_copy, - int upl_flags + int upl_flags ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_data_return(memory_object, - offset, - size, - resid_offset, - io_error, - dirty, - kernel_copy, - upl_flags); - } else if (memory_object->pager == &device_pager_workaround) { - - return device_pager_data_return(memory_object, - offset, - size, - dirty, - kernel_copy, - upl_flags); - } - else -#endif - { - return dp_memory_object_data_return(memory_object, - offset, - size, - NULL, - NULL, - dirty, - kernel_copy, - upl_flags); - } + return (memory_object->mo_pager_ops->memory_object_data_return)( + memory_object, + offset, + size, + resid_offset, + io_error, + dirty, + kernel_copy, + upl_flags); } /* Routine memory_object_data_initialize */ -kern_return_t memory_object_data_initialize +kern_return_t +memory_object_data_initialize ( memory_object_t memory_object, memory_object_offset_t offset, - vm_size_t size + memory_object_cluster_size_t size ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_data_initialize(memory_object, - offset, - size); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_data_initialize(memory_object, - offset, - size); - } else -#endif - return dp_memory_object_data_initialize(memory_object, - offset, - size); + return (memory_object->mo_pager_ops->memory_object_data_initialize)( + memory_object, + offset, + size); } /* Routine memory_object_data_unlock */ -kern_return_t memory_object_data_unlock +kern_return_t +memory_object_data_unlock ( memory_object_t memory_object, memory_object_offset_t offset, - vm_size_t size, + memory_object_size_t size, vm_prot_t desired_access ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_data_unlock(memory_object, - offset, - size, - desired_access); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_data_unlock(memory_object, - offset, - size, - desired_access); - } else -#endif - return dp_memory_object_data_unlock(memory_object, - offset, - size, - desired_access); + return (memory_object->mo_pager_ops->memory_object_data_unlock)( + memory_object, + offset, + size, + desired_access); } /* Routine memory_object_synchronize */ -kern_return_t memory_object_synchronize +kern_return_t +memory_object_synchronize ( memory_object_t memory_object, memory_object_offset_t offset, - vm_size_t size, + memory_object_size_t size, vm_sync_t sync_flags ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_synchronize(memory_object, - offset, - size, - sync_flags); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_synchronize(memory_object, - offset, - size, - sync_flags); - } else -#endif - return dp_memory_object_synchronize(memory_object, - offset, - size, - sync_flags); + panic("memory_object_syncrhonize no longer supported\n"); + + return (memory_object->mo_pager_ops->memory_object_synchronize)( + memory_object, + offset, + size, + sync_flags); } -/* Routine memory_object_unmap */ -kern_return_t memory_object_unmap + +/* + * memory_object_map() is called by VM (in vm_map_enter() and its variants) + * each time a "named" VM object gets mapped directly or indirectly + * (copy-on-write mapping). A "named" VM object has an extra reference held + * by the pager to keep it alive until the pager decides that the + * memory object (and its VM object) can be reclaimed. + * VM calls memory_object_last_unmap() (in vm_object_deallocate()) when all + * the mappings of that memory object have been removed. + * + * For a given VM object, calls to memory_object_map() and memory_object_unmap() + * are serialized (through object->mapping_in_progress), to ensure that the + * pager gets a consistent view of the mapping status of the memory object. + * + * This allows the pager to keep track of how many times a memory object + * has been mapped and with which protections, to decide when it can be + * reclaimed. + */ + +/* Routine memory_object_map */ +kern_return_t +memory_object_map +( + memory_object_t memory_object, + vm_prot_t prot +) +{ + return (memory_object->mo_pager_ops->memory_object_map)( + memory_object, + prot); +} + +/* Routine memory_object_last_unmap */ +kern_return_t +memory_object_last_unmap ( memory_object_t memory_object ) { -#ifdef MACH_BSD - if (memory_object->pager == &vnode_pager_workaround) { - return vnode_pager_unmap(memory_object); - } else if (memory_object->pager == &device_pager_workaround) { - return device_pager_unmap(memory_object); - } else -#endif - return dp_memory_object_unmap(memory_object); + return (memory_object->mo_pager_ops->memory_object_last_unmap)( + memory_object); } -/* Routine memory_object_create */ -kern_return_t memory_object_create +/* Routine memory_object_data_reclaim */ +kern_return_t +memory_object_data_reclaim ( - memory_object_default_t default_memory_manager, - vm_size_t new_memory_object_size, - memory_object_t *new_memory_object + memory_object_t memory_object, + boolean_t reclaim_backing_store ) { - return default_pager_memory_object_create(default_memory_manager, - new_memory_object_size, - new_memory_object); + if (memory_object->mo_pager_ops->memory_object_data_reclaim == NULL) { + return KERN_NOT_SUPPORTED; + } + return (memory_object->mo_pager_ops->memory_object_data_reclaim)( + memory_object, + reclaim_backing_store); +} + +boolean_t +memory_object_backing_object +( + memory_object_t memory_object, + memory_object_offset_t offset, + vm_object_t *backing_object, + vm_object_offset_t *backing_offset) +{ + if (memory_object->mo_pager_ops->memory_object_backing_object == NULL) { + return FALSE; + } + return (memory_object->mo_pager_ops->memory_object_backing_object)( + memory_object, + offset, + backing_object, + backing_offset); } upl_t convert_port_to_upl( - ipc_port_t port) + ipc_port_t port) { upl_t upl; ip_lock(port); if (!ip_active(port) || (ip_kotype(port) != IKOT_UPL)) { - ip_unlock(port); - return (upl_t)NULL; + ip_unlock(port); + return (upl_t)NULL; } - upl = (upl_t) port->ip_kobject; + upl = (upl_t) ip_get_kobject(port); ip_unlock(port); upl_lock(upl); - upl->ref_count+=1; + upl->ref_count += 1; upl_unlock(upl); return upl; } mach_port_t convert_upl_to_port( - __unused upl_t upl) + __unused upl_t upl) { return MACH_PORT_NULL; } __private_extern__ void upl_no_senders( - __unused ipc_port_t port, - __unused mach_port_mscount_t mscount) + __unused ipc_port_t port, + __unused mach_port_mscount_t mscount) { return; }