/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
#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
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);
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; \
- \
+ 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); \
+ !should_flush, \
+ upl_flags); \
\
vm_object_lock(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_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;
+ }
+ 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;
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
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_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;
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;
+ (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 */
- copy_size = (offset >= copy_object->shadow_offset) ?
- size : size - (copy_object->shadow_offset - offset);
-
- if(copy_size <= 0) {
- copy_size = 0;
+ 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 = ((copy_offset + copy_size)
- <= copy_object->size) ?
- copy_size : copy_object->size - copy_offset;
+ 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;
+ }
}
- /* check for a copy_offset which is beyond the end of */
- /* the copy_object */
- if(copy_size < 0)
- copy_size = 0;
copy_size+=copy_offset;
}
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);
+ /*
+ * 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
+ */
- 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);
+ 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;
- 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;
+ start = offset;
+ end = offset + size;
+ num_of_extents = 0;
+ e_mask = ~((vm_object_size_t)(EXTENT_SIZE - 1));
- 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;
- }
+ m = (vm_page_t) queue_first(&object->memq);
- PAGE_SLEEP(object, m, THREAD_UNINT);
- continue;
+ while (!queue_end(&object->memq, (queue_entry_t) m)) {
+ next = (vm_page_t) queue_next(&m->listq);
- 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 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,
+ memory_object_cluster_size_t cluster_size,
boolean_t silent_overwrite,
boolean_t advisory_pageout)
{
boolean_t temporary;
boolean_t may_cache;
boolean_t invalidate;
- vm_size_t cluster_size;
+ memory_object_cluster_size_t cluster_size;
memory_object_copy_strategy_t copy_strategy;
boolean_t silent_overwrite;
boolean_t advisory_pageout;
memory_object_iopl_request(
ipc_port_t port,
memory_object_offset_t offset,
- vm_size_t *upl_size,
+ upl_size_t *upl_size,
upl_t *upl_ptr,
upl_page_info_array_t user_page_list,
unsigned int *page_list_count,
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_lock(named_entry);
- if(named_entry->object) {
- /* 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. */
- vm_object_reference(named_entry->object);
- object = named_entry->object;
- named_entry_unlock(named_entry);
- } else {
+ if (named_entry->is_pager) {
object = vm_object_enter(named_entry->backing.pager,
named_entry->offset + named_entry->size,
named_entry->internal,
named_entry_unlock(named_entry);
return(KERN_INVALID_OBJECT);
}
- vm_object_lock(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->object = object;
+ named_entry->backing.object = object;
+ named_entry->is_pager = FALSE;
named_entry_unlock(named_entry);
/* wait for object to be ready */
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 {
memory_object_control_t control;
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,
host_default_memory_manager(
host_priv_t host_priv,
memory_object_default_t *default_manager,
- vm_size_t cluster_size)
+ memory_object_cluster_size_t cluster_size)
{
memory_object_default_t current_manager;
memory_object_default_t new_manager;
__private_extern__ memory_object_default_t
memory_manager_default_reference(
- vm_size_t *cluster_size)
+ memory_object_cluster_size_t *cluster_size)
{
memory_object_default_t 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 */
vm_page_lock_queues();
if (dst_page->no_isync == FALSE)
- pmap_page_protect(dst_page->phys_page, VM_PROT_NONE);
+ pmap_disconnect(dst_page->phys_page);
vm_page_free(dst_page);
vm_page_unlock_queues();
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;
-
+
/* 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) {
PAGE_WAKEUP(dst_page);
}
}
+
+ 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 (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;
+ }
+
break;
}
}
vm_object_lock(object);
- if (object->phys_contiguous)
+ if (object->phys_contiguous) {
+ vm_object_unlock(object);
return KERN_INVALID_OBJECT;
+ }
offset = offset_beg;
while (offset < offset_end) {
- if (dst_page = vm_page_lookup(object, offset)) {
- if (ops & UPL_ROP_DUMP) {
- if (dst_page->busy || dst_page->cleaning) {
+ 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
vm_page_lock_queues();
if (dst_page->no_isync == FALSE)
- pmap_page_protect(dst_page->phys_page, VM_PROT_NONE);
+ pmap_disconnect(dst_page->phys_page);
vm_page_free(dst_page);
vm_page_unlock_queues();
return KERN_SUCCESS;
}
+
+kern_return_t
+memory_object_pages_resident(
+ memory_object_control_t control,
+ boolean_t * has_pages_resident)
+{
+ 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->resident_page_count)
+ *has_pages_resident = TRUE;
+
+ return (KERN_SUCCESS);
+}
+
+
static zone_t mem_obj_control_zone;
__private_extern__ void
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_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
+ 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);
+ dp_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
+ 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);
+ dp_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
+ 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 dp_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) {
+ if (memory_object->pager == &vnode_pager_workaround) {
return vnode_pager_terminate(memory_object);
- } else if(memory_object->pager == &device_pager_workaround) {
+ } else if (memory_object->pager == &device_pager_workaround) {
return device_pager_terminate(memory_object);
} else
#endif
(
memory_object_t memory_object,
memory_object_offset_t offset,
- vm_size_t length,
+ memory_object_cluster_size_t length,
vm_prot_t desired_access
)
{
-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
+ 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 dp_memory_object_data_request(memory_object,
+ offset,
+ length,
+ desired_access);
}
/* 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);
+ 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);
- } else
+ offset,
+ size,
+ dirty,
+ kernel_copy,
+ upl_flags);
+ }
+ else
#endif
+ {
return dp_memory_object_data_return(memory_object,
- offset,
- size,
- dirty,
- kernel_copy);
+ offset,
+ size,
+ NULL,
+ NULL,
+ 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);
+ offset,
+ size);
} else if (memory_object->pager == &device_pager_workaround) {
return device_pager_data_initialize(memory_object,
- offset,
- size);
+ offset,
+ size);
} else
#endif
return dp_memory_object_data_initialize(memory_object,
- offset,
- size);
+ 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);
+ offset,
+ size,
+ desired_access);
} else if (memory_object->pager == &device_pager_workaround) {
return device_pager_data_unlock(memory_object,
- offset,
- size,
- desired_access);
+ offset,
+ size,
+ desired_access);
} else
#endif
return dp_memory_object_data_unlock(memory_object,
- offset,
- size,
- desired_access);
-
+ 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);
+ 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);
+ return device_pager_synchronize(memory_object,
+ offset,
+ size,
+ sync_flags);
} else
#endif
- return dp_memory_object_synchronize(
- memory_object,
- offset,
- size,
- sync_flags);
+ return dp_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);
+ return vnode_pager_unmap(memory_object);
} else if (memory_object->pager == &device_pager_workaround) {
- return device_pager_unmap(memory_object);
+ return device_pager_unmap(memory_object);
} else
#endif
- return dp_memory_object_unmap(memory_object);
+ return dp_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