/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
#include <vm/pmap.h> /* For pmap_clear_modify */
#include <vm/vm_kern.h> /* For kernel_map, vm_move */
#include <vm/vm_map.h> /* For vm_map_pageable */
+#include <vm/vm_purgeable_internal.h> /* Needed by some vm_page.h macros */
#if MACH_PAGEMAP
#include <vm/vm_external.h>
#endif /* MACH_PAGEMAP */
+#include <vm/vm_protos.h>
+
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)
-/*
- * Forward ref to file-local function:
- */
-boolean_t
-vm_object_update(vm_object_t, vm_object_offset_t,
- vm_size_t, memory_object_return_t, int, vm_prot_t);
-
/*
* Routine: memory_object_should_return_page
assert(!m->fictitious);
- if (m->wire_count != 0) {
- /*
- * 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.
- */
- 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);
+ /*
+ * If the page is wired, just clean or return the page if needed.
+ * Wired pages don't get flushed or disconnected from the pmap.
+ */
- return(MEMORY_OBJECT_LOCK_RESULT_DONE);
+ if (m->wire_count != 0) {
+ if (memory_object_should_return_page(m, should_return)) {
+ if (m->dirty)
+ return(MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN);
+ else
+ return(MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN);
}
- return(MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK);
+ return(MEMORY_OBJECT_LOCK_RESULT_DONE);
}
/*
*/
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
- */
- m->page_lock = prot;
- m->lock_supplied = TRUE;
- if (prot != VM_PROT_NONE)
- m->unusual = TRUE;
- else
- m->unusual = FALSE;
+ pmap_page_protect(m->phys_page, VM_PROT_ALL & ~prot);
- /*
- * 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.
- */
-
- m->unlock_request = VM_PROT_NONE;
-#endif /* 0 */
PAGE_WAKEUP(m);
}
/*
* Handle page returning.
*/
-
if (memory_object_should_return_page(m, should_return)) {
/*
* maps now.
*/
- vm_page_lock_queues();
+ vm_page_lockspin_queues();
VM_PAGE_QUEUES_REMOVE(m);
vm_page_unlock_queues();
if (!should_flush)
- pmap_page_protect(m->phys_page, VM_PROT_NONE);
+ pmap_disconnect(m->phys_page);
if (m->dirty)
return(MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN);
/*
* Handle flushing
*/
-
if (should_flush) {
VM_PAGE_FREE(m);
} else {
- extern boolean_t vm_page_deactivate_hint;
-
/*
* XXX Make clean but not flush a paging hint,
* and deactivate the pages. This is a hack
return(MEMORY_OBJECT_LOCK_RESULT_DONE);
}
-#define LIST_REQ_PAGEOUT_PAGES(object, data_cnt, action, po) \
+#define LIST_REQ_PAGEOUT_PAGES(object, data_cnt, action, po, ro, ioerr, iosync) \
MACRO_BEGIN \
\
- register int i; \
- register vm_page_t hp; \
- \
- vm_object_unlock(object); \
+ register int upl_flags; \
+ memory_object_t pager; \
+ \
+ if ((pager = (object)->pager) != MEMORY_OBJECT_NULL) { \
+ vm_object_paging_begin(object); \
+ vm_object_unlock(object); \
\
- (void) memory_object_data_return(object->pager, \
- po, \
- data_cnt, \
- (action == MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN), \
- !should_flush); \
+ if (iosync) \
+ upl_flags = UPL_MSYNC | UPL_IOSYNC; \
+ else \
+ upl_flags = UPL_MSYNC; \
+ \
+ (void) memory_object_data_return(pager, \
+ po, \
+ data_cnt, \
+ ro, \
+ ioerr, \
+ (action) == MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN,\
+ !should_flush, \
+ upl_flags); \
\
- vm_object_lock(object); \
+ vm_object_lock(object); \
+ vm_object_paging_end(object); \
+ } \
MACRO_END
/*
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;
- vm_object_offset_t original_offset = offset;
- boolean_t should_flush=flags & MEMORY_OBJECT_DATA_FLUSH;
+ __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",
offset -= object->paging_offset;
(void)vm_object_update(object,
- offset, size, should_return, flags, prot);
+ offset, size, resid_offset, io_errno, should_return, flags, prot);
vm_object_paging_end(object);
vm_object_unlock(object);
vm_object_sync(
vm_object_t object,
vm_object_offset_t offset,
- vm_size_t size,
+ vm_object_size_t size,
boolean_t should_flush,
- boolean_t should_return)
+ boolean_t should_return,
+ boolean_t should_iosync)
{
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",
vm_object_lock(object);
vm_object_paging_begin(object);
- rv = vm_object_update(object, offset, size,
+ if (should_flush)
+ flags = MEMORY_OBJECT_DATA_FLUSH;
+ else
+ flags = 0;
+
+ 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,
- (should_flush) ?
- MEMORY_OBJECT_DATA_FLUSH : 0,
+ flags,
VM_PROT_NO_CHANGE);
return rv;
}
+
+
+
+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_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;
+
+ for (;
+ offset < offset_end && object->resident_page_count;
+ offset += PAGE_SIZE_64) {
+
+ /*
+ * Limit the number of pages to be cleaned at once.
+ */
+ 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;
+ }
+
+ 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_lockspin_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;
+ }
+ break;
+ }
+ }
+ /*
+ * We have completed the scan for applicable pages.
+ * Clean any pages that have been saved.
+ */
+ if (data_cnt) {
+ LIST_REQ_PAGEOUT_PAGES(object,
+ data_cnt, pageout_action, paging_offset, offset_resid, io_errno, should_iosync);
+ }
+ return (retval);
+}
+
+
+
/*
* Routine: vm_object_update
* Description:
vm_object_update(
register vm_object_t object,
register vm_object_offset_t offset,
- register vm_size_t size,
+ 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 prot)
+ vm_prot_t protection)
{
- register vm_page_t m;
- vm_page_t holding_page;
- vm_size_t original_size = size;
- vm_object_offset_t paging_offset = 0;
- vm_object_t copy_object;
- vm_size_t data_cnt = 0;
- vm_object_offset_t last_offset = offset;
- memory_object_lock_result_t page_lock_result;
- memory_object_lock_result_t pageout_action;
+ 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;
- boolean_t pending_pageout = FALSE;
+ 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)
+ struct extent {
+ vm_object_offset_t e_base;
+ vm_object_offset_t e_min;
+ vm_object_offset_t e_max;
+ } extents[MAX_EXTENTS];
/*
* To avoid blocking while scanning for pages, save
!(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);
- if((((copy_object = object->copy) != NULL) && update_cow) ||
- (flags & MEMORY_OBJECT_DATA_SYNC)) {
- vm_size_t i;
- vm_size_t copy_size;
- vm_object_offset_t copy_offset;
+ vm_object_lock(object);
+ }
+ }
+ if ((copy_object != VM_OBJECT_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;
+ 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->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;
- if(copy_object != NULL) {
- /* translate offset with respect to shadow's offset */
- copy_offset = (offset >= copy_object->shadow_offset)?
- offset - copy_object->shadow_offset :
- (vm_object_offset_t) 0;
- if(copy_offset > copy_object->size)
- copy_offset = copy_object->size;
-
- /* clip size with respect to shadow offset */
- copy_size = (offset >= copy_object->shadow_offset) ?
- size : size - (copy_object->shadow_offset - offset);
-
- if(copy_size <= 0) {
- copy_size = 0;
- } else {
- copy_size = ((copy_offset + copy_size)
- <= copy_object->size) ?
- copy_size : copy_object->size - copy_offset;
- }
- /* check for a copy_offset which is beyond the end of */
- /* the copy_object */
- if(copy_size < 0)
- copy_size = 0;
-
- copy_size+=offset;
-
- vm_object_unlock(object);
- vm_object_lock(copy_object);
} else {
copy_object = object;
copy_size = offset + size;
copy_offset = offset;
}
+ fault_info.interruptible = THREAD_UNINT;
+ fault_info.behavior = VM_BEHAVIOR_SEQUENTIAL;
+ fault_info.user_tag = 0;
+ fault_info.lo_offset = copy_offset;
+ fault_info.hi_offset = copy_size;
+ fault_info.no_cache = FALSE;
vm_object_paging_begin(copy_object);
- for (i=copy_offset; i<copy_size; i+=PAGE_SIZE) {
+
+ for (i = copy_offset; i < copy_size; i += PAGE_SIZE) {
RETRY_COW_OF_LOCK_REQUEST:
+ fault_info.cluster_size = copy_size - i;
+
prot = VM_PROT_WRITE|VM_PROT_READ;
switch (vm_fault_page(copy_object, i,
VM_PROT_WRITE|VM_PROT_READ,
FALSE,
- THREAD_UNINT,
- copy_offset,
- copy_offset+copy_size,
- VM_BEHAVIOR_SEQUENTIAL,
&prot,
&page,
&top_page,
(int *)0,
&error,
FALSE,
- FALSE, NULL, 0)) {
+ FALSE, &fault_info)) {
case VM_FAULT_SUCCESS:
- if(top_page) {
+ if (top_page) {
vm_fault_cleanup(
page->object, top_page);
- PAGE_WAKEUP_DONE(page);
- vm_page_lock_queues();
- if (!page->active && !page->inactive)
- vm_page_activate(page);
- vm_page_unlock_queues();
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);
- vm_page_unlock_queues();
}
+ vm_page_lock_queues();
+ if (!page->active && !page->inactive)
+ vm_page_deactivate(page);
+ vm_page_unlock_queues();
+
+ PAGE_WAKEUP_DONE(page);
break;
case VM_FAULT_RETRY:
prot = VM_PROT_WRITE|VM_PROT_READ;
vm_object_paging_begin(copy_object);
goto RETRY_COW_OF_LOCK_REQUEST;
case VM_FAULT_MEMORY_ERROR:
+ if (object != copy_object)
+ vm_object_deallocate(copy_object);
vm_object_lock(object);
goto BYPASS_COW_COPYIN;
}
}
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)) {
+ 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:
- for (;
- size != 0;
- size -= PAGE_SIZE, offset += PAGE_SIZE_64)
- {
- /*
- * Limit the number of pages to be cleaned at once.
- */
- if (pending_pageout &&
- data_cnt >= PAGE_SIZE * DATA_WRITE_MAX)
- {
- LIST_REQ_PAGEOUT_PAGES(object, data_cnt,
- pageout_action, paging_offset);
- data_cnt = 0;
- pending_pageout = FALSE;
- }
-
- 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);
+ /*
+ * when we have a really large range to check relative
+ * to the number of actual resident pages, we'd like
+ * to use the resident page list to drive our checks
+ * however, the object lock will get dropped while processing
+ * 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
+ * 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
+ * a collection of extents (that encompass actual resident pages)
+ * to visit. This will at least allow us to deal with some of the
+ * more pathological cases in a more efficient manner. The current
+ * worst case (a single resident page at the end of an extremely large
+ * range) can take minutes to complete for ranges in the terrabyte
+ * category... since this routine is called when truncating a file,
+ * and we currently support files up to 16 Tbytes in size, this
+ * is not a theoretical problem
+ */
- switch (page_lock_result)
- {
- case MEMORY_OBJECT_LOCK_RESULT_DONE:
- /*
- * End of a cluster of dirty pages.
- */
- if(pending_pageout) {
- LIST_REQ_PAGEOUT_PAGES(object,
- data_cnt, pageout_action,
- paging_offset);
- data_cnt = 0;
- pending_pageout = FALSE;
- continue;
- }
- break;
+ 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;
- case MEMORY_OBJECT_LOCK_RESULT_MUST_BLOCK:
- /*
- * Since it is necessary to block,
- * clean any dirty pages now.
- */
- if(pending_pageout) {
- LIST_REQ_PAGEOUT_PAGES(object,
- data_cnt, pageout_action,
- paging_offset);
- pending_pageout = FALSE;
- data_cnt = 0;
- continue;
- }
+ start = offset;
+ end = offset + size;
+ num_of_extents = 0;
+ e_mask = ~((vm_object_size_t)(EXTENT_SIZE - 1));
- PAGE_SLEEP(object, m, THREAD_UNINT);
- continue;
+ m = (vm_page_t) queue_first(&object->memq);
- case MEMORY_OBJECT_LOCK_RESULT_MUST_CLEAN:
- case MEMORY_OBJECT_LOCK_RESULT_MUST_RETURN:
- /*
- * The clean and return cases are similar.
- *
- */
+ while (!queue_end(&object->memq, (queue_entry_t) m)) {
+ next = (vm_page_t) queue_next(&m->listq);
- /*
- * if this would form a discontiguous block,
- * clean the old pages and start anew.
- *
- */
-
- /*
- * Mark the page busy since we unlock the
- * object below.
- */
- m->busy = TRUE;
- if (pending_pageout &&
- (last_offset != offset ||
- pageout_action != page_lock_result)) {
- LIST_REQ_PAGEOUT_PAGES(object,
- data_cnt, pageout_action,
- paging_offset);
- pending_pageout = FALSE;
- data_cnt = 0;
- }
- m->busy = FALSE;
- holding_page = VM_PAGE_NULL;
- if(m->cleaning) {
- PAGE_SLEEP(object, m, THREAD_UNINT);
- continue;
- }
- if(!pending_pageout) {
- pending_pageout = TRUE;
- pageout_action = page_lock_result;
- paging_offset = offset;
- }
- if (should_flush) {
- vm_page_lock_queues();
- m->list_req_pending = TRUE;
- m->cleaning = TRUE;
- m->busy = TRUE;
- m->pageout = TRUE;
- vm_page_wire(m);
- vm_page_unlock_queues();
- } else {
- /*
- * Clean but do not flush
+ if ((m->offset >= start) && (m->offset < end)) {
+ /*
+ * this is a page we're interested in
+ * try to fit it into a current extent
*/
- vm_page_lock_queues();
- m->list_req_pending = TRUE;
- m->cleaning = TRUE;
- vm_page_unlock_queues();
-
+ for (n = 0; n < num_of_extents; n++) {
+ if ((m->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 (n == num_of_extents) {
+ /*
+ * didn't find a current extent that can encompass
+ * this page
+ */
+ 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);
+
+ 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
+ * 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;
+ }
+ /*
+ * now setup to run through the remaining pages
+ * to determine the overall min and max
+ * offset for the specified range
+ */
+ extents[0].e_base = 0;
+ e_mask = 0;
+ num_of_extents = 1;
+
+ /*
+ * by continuing, we'll reprocess the
+ * page that forced us to abandon trying
+ * to develop multiple extents
+ */
+ continue;
+ }
+ }
}
- vm_object_unlock(object);
-
-
- data_cnt += PAGE_SIZE;
- last_offset = offset + PAGE_SIZE_64;
- data_returned = TRUE;
-
- vm_object_lock(object);
- break;
+ m = next;
}
- break;
- }
- }
+ } else {
+ extents[0].e_min = offset;
+ extents[0].e_max = offset + (size - 1);
- /*
- * We have completed the scan for applicable pages.
- * Clean any pages that have been saved.
- */
- if (pending_pageout) {
- LIST_REQ_PAGEOUT_PAGES(object,
- data_cnt, pageout_action, paging_offset);
+ 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]
*
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
*/
- object = memory_object_control_to_vm_object(control);
if (object == VM_OBJECT_NULL)
return (KERN_INVALID_ARGUMENT);
boolean_t may_cache,
memory_object_copy_strategy_t copy_strategy,
boolean_t temporary,
- vm_size_t cluster_size,
boolean_t silent_overwrite,
boolean_t advisory_pageout)
{
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);
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
boolean_t temporary;
boolean_t may_cache;
boolean_t invalidate;
- vm_size_t cluster_size;
memory_object_copy_strategy_t copy_strategy;
boolean_t silent_overwrite;
boolean_t advisory_pageout;
#if notyet
invalidate = object->invalidate;
#endif
- cluster_size = object->cluster_size;
vm_object_unlock(object);
switch (flavor) {
perf = (memory_object_perf_info_t) attributes;
may_cache = perf->may_cache;
- cluster_size = round_page_32(perf->cluster_size);
break;
}
may_cache = attr->may_cache;
copy_strategy = attr->copy_strategy;
- cluster_size = page_size;
break;
}
copy_strategy = attr->copy_strategy;
may_cache = attr->may_cache_object;
- cluster_size = attr->cluster_size;
temporary = attr->temporary;
break;
may_cache,
copy_strategy,
temporary,
- cluster_size,
silent_overwrite,
advisory_pageout));
}
}
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;
attr = (memory_object_attr_info_t) attributes;
attr->copy_strategy = object->copy_strategy;
- attr->cluster_size = object->cluster_size;
+ attr->cluster_size = PAGE_SIZE;
attr->may_cache_object = object->can_persist;
attr->temporary = object->temporary;
}
+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)
+{
+ vm_object_t object;
+ kern_return_t ret;
+ int caller_flags;
+
+ caller_flags = *flags;
+
+ if (caller_flags & ~UPL_VALID_FLAGS) {
+ /*
+ * For forward compatibility's sake,
+ * reject any unknown flag.
+ */
+ return KERN_INVALID_VALUE;
+ }
+
+ if (ip_kotype(port) == IKOT_NAMED_ENTRY) {
+ vm_named_entry_t named_entry;
+
+ named_entry = (vm_named_entry_t)port->ip_kobject;
+ /* 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(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->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;
+
+ 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);
+ }
+
+ /* JMM - drop reference on pager here? */
+
+ /* 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);
+ }
+ } 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);
+ object = memory_object_control_to_vm_object(control);
+ 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->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 {
+ *flags = 0;
+ }
+ } else {
+ *flags = UPL_DEV_MEMORY | UPL_PHYS_CONTIG;
+ }
+
+ ret = vm_object_iopl_request(object,
+ offset,
+ *upl_size,
+ upl_ptr,
+ user_page_list,
+ page_list_count,
+ caller_flags);
+ vm_object_deallocate(object);
+ return ret;
+}
+
/*
* Routine: memory_object_upl_request [interface]
* Purpose:
memory_object_upl_request(
memory_object_control_t control,
memory_object_offset_t offset,
- vm_size_t size,
+ upl_size_t size,
upl_t *upl_ptr,
upl_page_info_array_t user_page_list,
unsigned int *page_list_count,
memory_object_super_upl_request(
memory_object_control_t control,
memory_object_offset_t offset,
- vm_size_t size,
- vm_size_t super_cluster,
+ upl_size_t size,
+ upl_size_t super_cluster,
upl_t *upl,
upl_page_info_t *user_page_list,
unsigned int *page_list_count,
cntrl_flags);
}
+kern_return_t
+memory_object_cluster_size(memory_object_control_t control, memory_object_offset_t *start,
+ vm_size_t *length, memory_object_fault_info_t fault_info)
+{
+ vm_object_t object;
+
+ 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;
+
+ vm_object_cluster_size(object, (vm_object_offset_t *)start, length, (vm_object_fault_info_t)fault_info);
+
+ *start += object->paging_offset;
+
+ return (KERN_SUCCESS);
+}
+
+
int vm_stat_discard_cleared_reply = 0;
int vm_stat_discard_cleared_unset = 0;
int vm_stat_discard_cleared_too_late = 0;
host_default_memory_manager(
host_priv_t host_priv,
memory_object_default_t *default_manager,
- vm_size_t cluster_size)
+ __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);
new_manager = *default_manager;
mutex_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 {
+
+ /*
+ * 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.
* 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);
}
-
+ out:
mutex_unlock(&memory_manager_default_lock);
*default_manager = returned_manager;
- return(KERN_SUCCESS);
+ return(result);
}
/*
*/
__private_extern__ memory_object_default_t
-memory_manager_default_reference(
- vm_size_t *cluster_size)
+memory_manager_default_reference(void)
{
memory_object_default_t current_manager;
current_manager = memory_manager_default;
}
memory_object_default_reference(current_manager);
- *cluster_size = memory_manager_default_cluster;
mutex_unlock(&memory_manager_default_lock);
return current_manager;
memory_manager_default_init(void)
{
memory_manager_default = MEMORY_OBJECT_DEFAULT_NULL;
- mutex_init(&memory_manager_default_lock, ETAP_VM_MEMMAN);
+ mutex_init(&memory_manager_default_lock, 0);
}
-void
-memory_object_deactivate_pages(
- vm_object_t object,
- vm_object_offset_t offset,
- vm_object_size_t size,
- boolean_t kill_page)
-{
- vm_object_t orig_object;
- int pages_moved = 0;
- int pages_found = 0;
-
- /*
- * entered with object lock held, acquire a paging reference to
- * prevent the memory_object and control ports from
- * being destroyed.
- */
- orig_object = object;
-
- for (;;) {
- register vm_page_t m;
- vm_object_offset_t toffset;
- vm_object_size_t tsize;
-
- vm_object_paging_begin(object);
- vm_page_lock_queues();
-
- for (tsize = size, toffset = offset; tsize; tsize -= PAGE_SIZE, toffset += PAGE_SIZE) {
-
- if ((m = vm_page_lookup(object, toffset)) != VM_PAGE_NULL) {
-
- pages_found++;
-
- if ((m->wire_count == 0) && (!m->private) && (!m->gobbled) && (!m->busy)) {
-
- m->reference = FALSE;
- pmap_clear_reference(m->phys_page);
-
- if ((kill_page) && (object->internal)) {
- m->precious = FALSE;
- m->dirty = FALSE;
- pmap_clear_modify(m->phys_page);
- vm_external_state_clr(object->existence_map, offset);
- }
- VM_PAGE_QUEUES_REMOVE(m);
-
- if(m->zero_fill) {
- queue_enter_first(
- &vm_page_queue_zf,
- m, vm_page_t, pageq);
- } else {
- queue_enter_first(
- &vm_page_queue_inactive,
- m, vm_page_t, pageq);
- }
-
- m->inactive = TRUE;
- if (!m->fictitious)
- vm_page_inactive_count++;
-
- pages_moved++;
- }
- }
- }
- vm_page_unlock_queues();
- vm_object_paging_end(object);
-
- if (object->shadow) {
- vm_object_t tmp_object;
-
- kill_page = 0;
-
- offset += object->shadow_offset;
-
- tmp_object = object->shadow;
- vm_object_lock(tmp_object);
-
- if (object != orig_object)
- vm_object_unlock(object);
- object = tmp_object;
- } else
- break;
- }
- if (object != orig_object)
- vm_object_unlock(object);
-}
/* 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 */
int *flags)
{
vm_object_t object;
- vm_page_t dst_page;
-
object = memory_object_control_to_vm_object(control);
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;
- }
- }
+/*
+ * 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.
+ */
- while(TRUE) {
- if(object->phys_contiguous) {
- vm_object_unlock(object);
- return KERN_INVALID_OBJECT;
- }
+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;
- if((dst_page = vm_page_lookup(object,offset)) == VM_PAGE_NULL) {
- vm_object_unlock(object);
- return KERN_FAILURE;
- }
+ object = memory_object_control_to_vm_object(control);
+ if (object == VM_OBJECT_NULL)
+ return (KERN_INVALID_ARGUMENT);
- /* 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;
- }
+ return vm_object_range_op(object,
+ offset_beg,
+ offset_end,
+ ops,
+ range);
+}
- if (ops & UPL_POP_DUMP) {
- vm_page_lock_queues();
- vm_page_free(dst_page);
- vm_page_unlock_queues();
- break;
- }
- if (flags) {
- *flags = 0;
+kern_return_t
+memory_object_pages_resident(
+ memory_object_control_t control,
+ boolean_t * has_pages_resident)
+{
+ vm_object_t object;
- /* Get the condition of flags before requested ops */
- /* are undertaken */
+ *has_pages_resident = FALSE;
- 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;
- }
- if (phys_entry)
- *phys_entry = dst_page->phys_page;
+ object = memory_object_control_to_vm_object(control);
+ if (object == VM_OBJECT_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ if (object->resident_page_count)
+ *has_pages_resident = TRUE;
- /* 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;
- }
+ return (KERN_SUCCESS);
+}
- 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);
- }
- }
- break;
- }
+kern_return_t
+memory_object_signed(
+ memory_object_control_t control,
+ boolean_t is_signed)
+{
+ vm_object_t object;
+
+ object = memory_object_control_to_vm_object(control);
+ if (object == VM_OBJECT_NULL)
+ return KERN_INVALID_ARGUMENT;
+ vm_object_lock(object);
+ object->code_signed = is_signed;
vm_object_unlock(object);
+
return KERN_SUCCESS;
-
}
static zone_t mem_obj_control_zone;
memory_object_control_t control;
control = (memory_object_control_t)zalloc(mem_obj_control_zone);
- if (control != MEMORY_OBJECT_CONTROL_NULL)
- control->object = object;
+ if (control != MEMORY_OBJECT_CONTROL_NULL) {
+ control->moc_object = object;
+ control->moc_ikot = IKOT_MEM_OBJ_CONTROL; /* fake ip_kotype */
+ }
return (control);
}
memory_object_control_t control,
vm_object_t object)
{
- assert((control->object != VM_OBJECT_NULL) &&
- (control->object != object));
- control->object = 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)
{
- 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->object);
+ return (control->moc_object);
}
memory_object_control_t
convert_port_to_mo_control(
- mach_port_t port)
+ __unused mach_port_t port)
{
return MEMORY_OBJECT_CONTROL_NULL;
}
mach_port_t
convert_mo_control_to_port(
- memory_object_control_t control)
+ __unused memory_object_control_t control)
{
return MACH_PORT_NULL;
}
void
memory_object_control_reference(
- memory_object_control_t control)
+ __unused memory_object_control_t control)
{
return;
}
memory_object_control_deallocate(
memory_object_control_t control)
{
- zfree(mem_obj_control_zone, (vm_offset_t)control);
+ zfree(mem_obj_control_zone, control);
}
void
memory_object_control_disable(
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
memory_object_t
convert_port_to_memory_object(
- mach_port_t port)
+ __unused mach_port_t port)
{
return (MEMORY_OBJECT_NULL);
}
mach_port_t
convert_memory_object_to_port(
- memory_object_t object)
+ __unused memory_object_t object)
{
return (MACH_PORT_NULL);
}
-#ifdef MACH_BSD
-/* remove after component interface available */
-extern int vnode_pager_workaround;
-extern int device_pager_workaround;
-#endif
-
/* Routine memory_object_reference */
void memory_object_reference(
memory_object_t memory_object)
{
-extern void dp_memory_object_reference(memory_object_t);
-
-#ifdef MACH_BSD
- extern void vnode_pager_reference(memory_object_t);
- extern void device_pager_reference(memory_object_t);
-
- 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(
memory_object_t memory_object)
{
-extern void dp_memory_object_deallocate(memory_object_t);
-
-#ifdef MACH_BSD
- extern void vnode_pager_deallocate(memory_object_t);
- extern void device_pager_deallocate(memory_object_t);
-
- 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);
}
(
memory_object_t memory_object,
memory_object_control_t memory_control,
- vm_size_t memory_object_page_size
+ memory_object_cluster_size_t memory_object_page_size
)
{
-extern kern_return_t dp_memory_object_init(memory_object_t,
- memory_object_control_t,
- vm_size_t);
-#ifdef MACH_BSD
-extern kern_return_t vnode_pager_init(memory_object_t,
- memory_object_control_t,
- vm_size_t);
-extern kern_return_t device_pager_init(memory_object_t,
- memory_object_control_t,
- vm_size_t);
-
- 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 */
memory_object_t memory_object
)
{
-extern kern_return_t dp_memory_object_terminate(memory_object_t);
-
-#ifdef MACH_BSD
-extern kern_return_t vnode_pager_terminate(memory_object_t);
-extern kern_return_t device_pager_terminate(memory_object_t);
-
- 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 */
(
memory_object_t memory_object,
memory_object_offset_t offset,
- vm_size_t length,
- vm_prot_t desired_access
+ memory_object_cluster_size_t length,
+ vm_prot_t desired_access,
+ memory_object_fault_info_t fault_info
)
{
-extern kern_return_t dp_memory_object_data_request(memory_object_t,
- memory_object_offset_t, vm_size_t, vm_prot_t);
-
-#ifdef MACH_BSD
-extern kern_return_t vnode_pager_data_request(memory_object_t,
- memory_object_offset_t, vm_size_t, vm_prot_t);
-extern kern_return_t device_pager_data_request(memory_object_t,
- memory_object_offset_t, vm_size_t, vm_prot_t);
-
- 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 */
memory_object_t memory_object,
memory_object_offset_t offset,
vm_size_t size,
+ memory_object_offset_t *resid_offset,
+ int *io_error,
boolean_t dirty,
- boolean_t kernel_copy
+ boolean_t kernel_copy,
+ int upl_flags
)
{
- extern kern_return_t dp_memory_object_data_return(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- boolean_t,
- boolean_t);
-#ifdef MACH_BSD
- extern kern_return_t vnode_pager_data_return(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- boolean_t,
- boolean_t);
- extern kern_return_t device_pager_data_return(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- boolean_t,
- boolean_t);
-
- if (memory_object->pager == &vnode_pager_workaround) {
- return vnode_pager_data_return(memory_object,
- offset,
- size,
- dirty,
- kernel_copy);
- } else if (memory_object->pager == &device_pager_workaround) {
- return device_pager_data_return(memory_object,
- offset,
- size,
- dirty,
- kernel_copy);
- } else
-#endif
- return dp_memory_object_data_return(memory_object,
- offset,
- size,
- dirty,
- kernel_copy);
+ 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 */
vm_size_t size
)
{
-
- extern kern_return_t dp_memory_object_data_initialize(memory_object_t,
- memory_object_offset_t,
- vm_size_t);
-#ifdef MACH_BSD
- extern kern_return_t vnode_pager_data_initialize(memory_object_t,
- memory_object_offset_t,
- vm_size_t);
- extern kern_return_t device_pager_data_initialize(memory_object_t,
- memory_object_offset_t,
- vm_size_t);
-
- 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 */
vm_prot_t desired_access
)
{
- extern kern_return_t dp_memory_object_data_unlock(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_prot_t);
-#ifdef MACH_BSD
- extern kern_return_t vnode_pager_data_unlock(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_prot_t);
- extern kern_return_t device_pager_data_unlock(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_prot_t);
-
- 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 */
vm_sync_t sync_flags
)
{
- extern kern_return_t dp_memory_object_data_synchronize(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_sync_t);
-#ifdef MACH_BSD
- extern kern_return_t vnode_pager_data_synchronize(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_sync_t);
- extern kern_return_t device_pager_data_synchronize(memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_sync_t);
-
- 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);
+ return (memory_object->mo_pager_ops->memory_object_synchronize)(
+ memory_object,
+ offset,
+ size,
+ sync_flags);
}
/* Routine memory_object_unmap */
memory_object_t memory_object
)
{
- extern kern_return_t dp_memory_object_unmap(memory_object_t);
-#ifdef MACH_BSD
- extern kern_return_t vnode_pager_unmap(memory_object_t);
- extern kern_return_t device_pager_unmap(memory_object_t);
-
- 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_unmap)(
+ memory_object);
}
/* Routine memory_object_create */
memory_object_t *new_memory_object
)
{
-extern kern_return_t default_pager_memory_object_create(memory_object_default_t,
- vm_size_t,
- memory_object_t *);
-
return default_pager_memory_object_create(default_memory_manager,
new_memory_object_size,
new_memory_object);
}
+upl_t
+convert_port_to_upl(
+ 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;
+ }
+ upl = (upl_t) port->ip_kobject;
+ ip_unlock(port);
+ upl_lock(upl);
+ upl->ref_count+=1;
+ upl_unlock(upl);
+ return upl;
+}
+
+mach_port_t
+convert_upl_to_port(
+ __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)
+{
+ return;
+}
projects / apple / xnu.git / blobdiff