/*
- * Copyright (c) 2000-2001 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <sys/errno.h>
-#include <kern/host.h>
+
#include <mach/mach_types.h>
-#include <vm/vm_map.h>
-#include <vm/vm_kern.h>
-#include <vm/vm_pageout.h>
+#include <mach/mach_traps.h>
+#include <mach/host_priv.h>
#include <mach/kern_return.h>
+#include <mach/memory_object_control.h>
#include <mach/memory_object_types.h>
#include <mach/port.h>
#include <mach/policy.h>
+#include <mach/upl.h>
+#include <mach/thread_act.h>
+
+#include <kern/assert.h>
+#include <kern/host.h>
+#include <kern/thread.h>
+
#include <ipc/ipc_port.h>
#include <ipc/ipc_space.h>
-#include <kern/thread.h>
+
+#include <default_pager/default_pager_types.h>
+#include <default_pager/default_pager_object_server.h>
+
+#include <vm/vm_map.h>
+#include <vm/vm_pageout.h>
#include <vm/memory_object.h>
#include <vm/vm_pageout.h>
+#include <vm/vm_protos.h>
+#include <vm/vm_purgeable_internal.h>
-#include <default_pager/default_pager_types.h>
/* BSD VM COMPONENT INTERFACES */
int
return(map->hdr.nentries);
}
-/*
- *
- */
-vm_offset_t
-get_map_start(
- vm_map_t map)
+mach_vm_offset_t
+mach_get_vm_start(vm_map_t map)
{
- return(vm_map_first_entry(map)->vme_start);
+ return( vm_map_first_entry(map)->vme_start);
}
-/*
- *
- */
-vm_offset_t
-get_map_end(
- vm_map_t map)
+mach_vm_offset_t
+mach_get_vm_end(vm_map_t map)
{
- return(vm_map_last_entry(map)->vme_end);
+ return( vm_map_last_entry(map)->vme_end);
}
/*
* BSD VNODE PAGER
*/
-/* until component support available */
-int vnode_pager_workaround;
-
-typedef int vnode_port_t;
+const struct memory_object_pager_ops vnode_pager_ops = {
+ vnode_pager_reference,
+ vnode_pager_deallocate,
+ vnode_pager_init,
+ vnode_pager_terminate,
+ vnode_pager_data_request,
+ vnode_pager_data_return,
+ vnode_pager_data_initialize,
+ vnode_pager_data_unlock,
+ vnode_pager_synchronize,
+ vnode_pager_map,
+ vnode_pager_last_unmap,
+ NULL, /* data_reclaim */
+ "vnode pager"
+};
typedef struct vnode_pager {
- int *pager; /* pager workaround pointer */
- unsigned int pager_ikot; /* JMM: fake ip_kotype() */
+ struct ipc_object_header pager_header; /* fake ip_kotype() */
+ memory_object_pager_ops_t pager_ops; /* == &vnode_pager_ops */
unsigned int ref_count; /* reference count */
memory_object_control_t control_handle; /* mem object control handle */
- vnode_port_t vnode_handle; /* vnode handle */
+ struct vnode *vnode_handle; /* vnode handle */
} *vnode_pager_t;
+#define pager_ikot pager_header.io_bits
+
ipc_port_t
-trigger_name_to_port(
+trigger_name_to_port( /* forward */
mach_port_t);
-void
-vnode_pager_bootstrap(
- void);
-
-void
-vnode_pager_alloc_map(
- void);
-
-memory_object_t
-vnode_pager_setup(
- vnode_port_t,
- memory_object_t);
-
-
-kern_return_t
-vnode_pager_init(
- memory_object_t,
- memory_object_control_t,
- vm_size_t);
-
-kern_return_t
-vnode_pager_get_object_size(
- memory_object_t,
- memory_object_offset_t *);
-
kern_return_t
-vnode_pager_data_request(
- memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- vm_prot_t);
-
-kern_return_t
-vnode_pager_data_return(
- memory_object_t,
- memory_object_offset_t,
- vm_size_t,
- boolean_t,
- boolean_t);
-
-kern_return_t
-vnode_pager_data_initialize(
- memory_object_t,
- memory_object_offset_t,
- vm_size_t);
-
-void
-vnode_pager_deallocate(
- memory_object_t);
-
-kern_return_t
-vnode_pager_terminate(
- memory_object_t);
-
-kern_return_t
-vnode_pager_cluster_read(
+vnode_pager_cluster_read( /* forward */
vnode_pager_t,
- vm_object_offset_t,
+ vm_object_offset_t,
+ vm_object_offset_t,
+ uint32_t,
vm_size_t);
void
-vnode_pager_cluster_write(
+vnode_pager_cluster_write( /* forward */
vnode_pager_t,
vm_object_offset_t,
- vm_size_t);
-
+ vm_size_t,
+ vm_object_offset_t *,
+ int *,
+ int);
-int
-vnode_pagein(
- vnode_port_t,
- upl_t,
- vm_offset_t,
- vm_object_offset_t,
- int,
- int,
- int *);
-int
-vnode_pageout(
- vnode_port_t,
- upl_t,
- vm_offset_t,
- vm_object_offset_t,
- int,
- int,
- int *);
-
-vm_object_offset_t
-vnode_pager_get_filesize(
- vnode_port_t);
vnode_pager_t
-vnode_object_create(
- vnode_port_t vp);
+vnode_object_create( /* forward */
+ struct vnode *);
vnode_pager_t
-vnode_pager_lookup(
+vnode_pager_lookup( /* forward */
memory_object_t);
-void
-vnode_pager_release_from_cache(
- int *cnt);
-
zone_t vnode_pager_zone;
#define PAGER_DEBUG(LEVEL, A)
#endif
+extern int proc_resetpcontrol(int);
+
+#if DEVELOPMENT || DEBUG
+extern unsigned long vm_cs_validated_resets;
+#endif
+
/*
- * Routine: macx_triggers
+ * Routine: mach_macx_triggers
* Function:
* Syscall interface to set the call backs for low and
* high water marks.
*/
int
-macx_triggers(
- int hi_water,
- int low_water,
- int flags,
- mach_port_t trigger_name)
+mach_macx_triggers(
+ struct macx_triggers_args *args)
{
+ int hi_water = args->hi_water;
+ int low_water = args->low_water;
+ int flags = args->flags;
+ mach_port_t trigger_name = args->alert_port;
kern_return_t kr;
memory_object_default_t default_pager;
ipc_port_t trigger_port;
if(kr != KERN_SUCCESS) {
return EINVAL;
}
+
+ if (((flags & SWAP_ENCRYPT_ON) && (flags & SWAP_ENCRYPT_OFF)) ||
+ ((flags & SWAP_COMPACT_ENABLE) && (flags & SWAP_COMPACT_DISABLE))) {
+ /* can't have it both ways */
+ return EINVAL;
+ }
+
+ if (default_pager_init_flag == 0) {
+ start_def_pager(NULL);
+ default_pager_init_flag = 1;
+ }
+
+ if (flags & SWAP_ENCRYPT_ON) {
+ /* ENCRYPTED SWAP: tell default_pager to encrypt */
+ default_pager_triggers(default_pager,
+ 0, 0,
+ SWAP_ENCRYPT_ON,
+ IP_NULL);
+ } else if (flags & SWAP_ENCRYPT_OFF) {
+ /* ENCRYPTED SWAP: tell default_pager not to encrypt */
+ default_pager_triggers(default_pager,
+ 0, 0,
+ SWAP_ENCRYPT_OFF,
+ IP_NULL);
+ }
+
+ if (flags & USE_EMERGENCY_SWAP_FILE_FIRST) {
+ /*
+ * Time to switch to the emergency segment.
+ */
+ return default_pager_triggers(default_pager,
+ 0, 0,
+ USE_EMERGENCY_SWAP_FILE_FIRST,
+ IP_NULL);
+ }
+
+ if (flags & SWAP_FILE_CREATION_ERROR) {
+ /*
+ * For some reason, the dynamic pager failed to create a swap file.
+ */
+ trigger_port = trigger_name_to_port(trigger_name);
+ if(trigger_port == NULL) {
+ return EINVAL;
+ }
+ /* trigger_port is locked and active */
+ ipc_port_make_send_locked(trigger_port);
+ ip_unlock(trigger_port);
+ default_pager_triggers(default_pager,
+ 0, 0,
+ SWAP_FILE_CREATION_ERROR,
+ trigger_port);
+ }
+
if (flags & HI_WAT_ALERT) {
trigger_port = trigger_name_to_port(trigger_name);
if(trigger_port == NULL) {
}
/* trigger_port is locked and active */
ipc_port_make_send_locked(trigger_port);
- /* now unlocked */
+ ip_unlock(trigger_port);
default_pager_triggers(default_pager,
hi_water, low_water,
HI_WAT_ALERT, trigger_port);
}
/* trigger_port is locked and active */
ipc_port_make_send_locked(trigger_port);
- /* and now its unlocked */
+ ip_unlock(trigger_port);
default_pager_triggers(default_pager,
hi_water, low_water,
LO_WAT_ALERT, trigger_port);
}
+
+ if (flags & PROC_RESUME) {
+
+ /*
+ * For this call, hi_water is used to pass in the pid of the process we want to resume
+ * or unthrottle. This is of course restricted to the superuser (checked inside of
+ * proc_resetpcontrol).
+ */
+
+ return proc_resetpcontrol(hi_water);
+ }
+
/*
* Set thread scheduling priority and policy for the current thread
* it is assumed for the time being that the thread setting the alert
- * is the same one which will be servicing it.
+ * is the same one which will be servicing it.
+ *
+ * XXX This does not belong in the kernel XXX
*/
- {
- struct policy_timeshare_base fifo_base;
- struct policy_timeshare_limit fifo_limit;
- policy_base_t base;
- processor_set_t pset;
- policy_limit_t limit;
-
- pset = (current_thread())->processor_set;
- base = (policy_base_t) &fifo_base;
- limit = (policy_limit_t) &fifo_limit;
- fifo_limit.max_priority = fifo_base.base_priority = MAXPRI_STANDARD;
- thread_set_policy((current_thread())->top_act, pset, POLICY_FIFO, base, POLICY_TIMESHARE_BASE_COUNT, limit, POLICY_TIMESHARE_LIMIT_COUNT);
+ if (flags & HI_WAT_ALERT) {
+ thread_precedence_policy_data_t pre;
+ thread_extended_policy_data_t ext;
+
+ ext.timeshare = FALSE;
+ pre.importance = INT32_MAX;
+
+ thread_policy_set(current_thread(),
+ THREAD_EXTENDED_POLICY,
+ (thread_policy_t)&ext,
+ THREAD_EXTENDED_POLICY_COUNT);
+
+ thread_policy_set(current_thread(),
+ THREAD_PRECEDENCE_POLICY,
+ (thread_policy_t)&pre,
+ THREAD_PRECEDENCE_POLICY_COUNT);
+
+ current_thread()->options |= TH_OPT_VMPRIV;
}
- current_thread()->vm_privilege = TRUE;
+ if (flags & (SWAP_COMPACT_DISABLE | SWAP_COMPACT_ENABLE)) {
+ return macx_backing_store_compaction(flags & (SWAP_COMPACT_DISABLE | SWAP_COMPACT_ENABLE));
+ }
+
+ return 0;
}
/*
return (NULL);
space = current_space();
- if(ipc_port_translate_receive(space, (mach_port_name_t)trigger_name,
+ if(ipc_port_translate_receive(space, CAST_MACH_PORT_TO_NAME(trigger_name),
&trigger_port) != KERN_SUCCESS)
return (NULL);
return trigger_port;
}
+
+extern int uiomove64(addr64_t, int, void *);
+#define MAX_RUN 32
+
+int
+memory_object_control_uiomove(
+ memory_object_control_t control,
+ memory_object_offset_t offset,
+ void * uio,
+ int start_offset,
+ int io_requested,
+ int mark_dirty,
+ int take_reference)
+{
+ vm_object_t object;
+ vm_page_t dst_page;
+ int xsize;
+ int retval = 0;
+ int cur_run;
+ int cur_needed;
+ int i;
+ int orig_offset;
+ vm_page_t page_run[MAX_RUN];
+
+ object = memory_object_control_to_vm_object(control);
+ if (object == VM_OBJECT_NULL) {
+ return (0);
+ }
+ assert(!object->internal);
+
+ vm_object_lock(object);
+
+ if (mark_dirty && object->copy != VM_OBJECT_NULL) {
+ /*
+ * We can't modify the pages without honoring
+ * copy-on-write obligations first, so fall off
+ * this optimized path and fall back to the regular
+ * path.
+ */
+ vm_object_unlock(object);
+ return 0;
+ }
+ orig_offset = start_offset;
+
+ while (io_requested && retval == 0) {
+
+ cur_needed = (start_offset + io_requested + (PAGE_SIZE - 1)) / PAGE_SIZE;
+
+ if (cur_needed > MAX_RUN)
+ cur_needed = MAX_RUN;
+
+ for (cur_run = 0; cur_run < cur_needed; ) {
+
+ if ((dst_page = vm_page_lookup(object, offset)) == VM_PAGE_NULL)
+ break;
+
+
+ if (dst_page->busy || dst_page->cleaning) {
+ /*
+ * someone else is playing with the page... if we've
+ * already collected pages into this run, go ahead
+ * and process now, we can't block on this
+ * page while holding other pages in the BUSY state
+ * otherwise we will wait
+ */
+ if (cur_run)
+ break;
+ PAGE_SLEEP(object, dst_page, THREAD_UNINT);
+ continue;
+ }
+ if (dst_page->laundry) {
+ dst_page->pageout = FALSE;
+
+ vm_pageout_steal_laundry(dst_page, FALSE);
+ }
+ /*
+ * this routine is only called when copying
+ * to/from real files... no need to consider
+ * encrypted swap pages
+ */
+ assert(!dst_page->encrypted);
+
+ if (mark_dirty) {
+ SET_PAGE_DIRTY(dst_page, FALSE);
+ if (dst_page->cs_validated &&
+ !dst_page->cs_tainted) {
+ /*
+ * CODE SIGNING:
+ * We're modifying a code-signed
+ * page: force revalidate
+ */
+ dst_page->cs_validated = FALSE;
+#if DEVELOPMENT || DEBUG
+ vm_cs_validated_resets++;
+#endif
+ pmap_disconnect(dst_page->phys_page);
+ }
+ }
+ dst_page->busy = TRUE;
+
+ page_run[cur_run++] = dst_page;
+
+ offset += PAGE_SIZE_64;
+ }
+ if (cur_run == 0)
+ /*
+ * we hit a 'hole' in the cache or
+ * a page we don't want to try to handle,
+ * so bail at this point
+ * we'll unlock the object below
+ */
+ break;
+ vm_object_unlock(object);
+
+ for (i = 0; i < cur_run; i++) {
+
+ dst_page = page_run[i];
+
+ if ((xsize = PAGE_SIZE - start_offset) > io_requested)
+ xsize = io_requested;
+
+ if ( (retval = uiomove64((addr64_t)(((addr64_t)(dst_page->phys_page) << PAGE_SHIFT) + start_offset), xsize, uio)) )
+ break;
+
+ io_requested -= xsize;
+ start_offset = 0;
+ }
+ vm_object_lock(object);
+
+ /*
+ * if we have more than 1 page to work on
+ * in the current run, or the original request
+ * started at offset 0 of the page, or we're
+ * processing multiple batches, we will move
+ * the pages to the tail of the inactive queue
+ * to implement an LRU for read/write accesses
+ *
+ * the check for orig_offset == 0 is there to
+ * mitigate the cost of small (< page_size) requests
+ * to the same page (this way we only move it once)
+ */
+ if (take_reference && (cur_run > 1 || orig_offset == 0)) {
+
+ vm_page_lockspin_queues();
+
+ for (i = 0; i < cur_run; i++)
+ vm_page_lru(page_run[i]);
+
+ vm_page_unlock_queues();
+ }
+ for (i = 0; i < cur_run; i++) {
+ dst_page = page_run[i];
+
+ /*
+ * someone is explicitly referencing this page...
+ * update clustered and speculative state
+ *
+ */
+ if (dst_page->clustered)
+ VM_PAGE_CONSUME_CLUSTERED(dst_page);
+
+ PAGE_WAKEUP_DONE(dst_page);
+ }
+ orig_offset = 0;
+ }
+ vm_object_unlock(object);
+
+ return (retval);
+}
+
+
/*
*
*/
size = (vm_size_t) sizeof(struct vnode_pager);
vnode_pager_zone = zinit(size, (vm_size_t) MAX_VNODE*size,
PAGE_SIZE, "vnode pager structures");
+ zone_change(vnode_pager_zone, Z_CALLERACCT, FALSE);
+ zone_change(vnode_pager_zone, Z_NOENCRYPT, TRUE);
+
+
+#if CONFIG_CODE_DECRYPTION
+ apple_protect_pager_bootstrap();
+#endif /* CONFIG_CODE_DECRYPTION */
+ swapfile_pager_bootstrap();
return;
}
*/
memory_object_t
vnode_pager_setup(
- vnode_port_t vp,
- memory_object_t pager)
+ struct vnode *vp,
+ __unused memory_object_t pager)
{
vnode_pager_t vnode_object;
kern_return_t
vnode_pager_init(memory_object_t mem_obj,
memory_object_control_t control,
- vm_size_t pg_size)
+#if !DEBUG
+ __unused
+#endif
+ memory_object_cluster_size_t pg_size)
{
vnode_pager_t vnode_object;
kern_return_t kr;
memory_object_attr_info_data_t attributes;
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_init: %x, %x, %x\n", pager, pager_request, pg_size));
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_init: %p, %p, %lx\n", mem_obj, control, (unsigned long)pg_size));
if (control == MEMORY_OBJECT_CONTROL_NULL)
return KERN_INVALID_ARGUMENT;
vnode_object = vnode_pager_lookup(mem_obj);
memory_object_control_reference(control);
+
vnode_object->control_handle = control;
attributes.copy_strategy = MEMORY_OBJECT_COPY_DELAY;
vnode_pager_data_return(
memory_object_t mem_obj,
memory_object_offset_t offset,
- vm_size_t data_cnt,
- boolean_t dirty,
- boolean_t kernel_copy)
+ memory_object_cluster_size_t data_cnt,
+ memory_object_offset_t *resid_offset,
+ int *io_error,
+ __unused boolean_t dirty,
+ __unused boolean_t kernel_copy,
+ int upl_flags)
{
register vnode_pager_t vnode_object;
vnode_object = vnode_pager_lookup(mem_obj);
- vnode_pager_cluster_write(vnode_object, offset, data_cnt);
+ vnode_pager_cluster_write(vnode_object, offset, data_cnt, resid_offset, io_error, upl_flags);
return KERN_SUCCESS;
}
kern_return_t
vnode_pager_data_initialize(
- memory_object_t mem_obj,
- memory_object_offset_t offset,
- vm_size_t data_cnt)
+ __unused memory_object_t mem_obj,
+ __unused memory_object_offset_t offset,
+ __unused memory_object_cluster_size_t data_cnt)
{
+ panic("vnode_pager_data_initialize");
return KERN_FAILURE;
}
kern_return_t
vnode_pager_data_unlock(
- memory_object_t mem_obj,
- memory_object_offset_t offset,
- vm_size_t size,
- vm_prot_t desired_access)
+ __unused memory_object_t mem_obj,
+ __unused memory_object_offset_t offset,
+ __unused memory_object_size_t size,
+ __unused vm_prot_t desired_access)
{
return KERN_FAILURE;
}
+kern_return_t
+vnode_pager_get_isinuse(
+ memory_object_t mem_obj,
+ uint32_t *isinuse)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ *isinuse = 1;
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ *isinuse = vnode_pager_isinuse(vnode_object->vnode_handle);
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+vnode_pager_get_throttle_io_limit(
+ memory_object_t mem_obj,
+ uint32_t *limit)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops)
+ return KERN_INVALID_ARGUMENT;
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ (void)vnode_pager_return_throttle_io_limit(vnode_object->vnode_handle, limit);
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+vnode_pager_get_isSSD(
+ memory_object_t mem_obj,
+ boolean_t *isSSD)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops)
+ return KERN_INVALID_ARGUMENT;
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ *isSSD = vnode_pager_isSSD(vnode_object->vnode_handle);
+ return KERN_SUCCESS;
+}
+
kern_return_t
vnode_pager_get_object_size(
memory_object_t mem_obj,
{
vnode_pager_t vnode_object;
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ *length = 0;
+ return KERN_INVALID_ARGUMENT;
+ }
+
vnode_object = vnode_pager_lookup(mem_obj);
*length = vnode_pager_get_filesize(vnode_object->vnode_handle);
return KERN_SUCCESS;
}
+kern_return_t
+vnode_pager_get_object_name(
+ memory_object_t mem_obj,
+ char *pathname,
+ vm_size_t pathname_len,
+ char *filename,
+ vm_size_t filename_len,
+ boolean_t *truncated_path_p)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ return vnode_pager_get_name(vnode_object->vnode_handle,
+ pathname,
+ pathname_len,
+ filename,
+ filename_len,
+ truncated_path_p);
+}
+
+kern_return_t
+vnode_pager_get_object_mtime(
+ memory_object_t mem_obj,
+ struct timespec *mtime,
+ struct timespec *cs_mtime)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ return vnode_pager_get_mtime(vnode_object->vnode_handle,
+ mtime,
+ cs_mtime);
+}
+
+kern_return_t
+vnode_pager_get_object_cs_blobs(
+ memory_object_t mem_obj,
+ void **blobs)
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj == MEMORY_OBJECT_NULL ||
+ mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ return vnode_pager_get_cs_blobs(vnode_object->vnode_handle,
+ blobs);
+}
+
+#if CHECK_CS_VALIDATION_BITMAP
+kern_return_t
+vnode_pager_cs_check_validation_bitmap(
+ memory_object_t mem_obj,
+ memory_object_offset_t offset,
+ int optype )
+{
+ vnode_pager_t vnode_object;
+
+ if (mem_obj == MEMORY_OBJECT_NULL ||
+ mem_obj->mo_pager_ops != &vnode_pager_ops) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+ return ubc_cs_check_validation_bitmap( vnode_object->vnode_handle, offset, optype );
+}
+#endif /* CHECK_CS_VALIDATION_BITMAP */
+
/*
*
*/
vnode_pager_data_request(
memory_object_t mem_obj,
memory_object_offset_t offset,
- vm_size_t length,
- vm_prot_t protection_required)
+ __unused memory_object_cluster_size_t length,
+ __unused vm_prot_t desired_access,
+ memory_object_fault_info_t fault_info)
{
- register vnode_pager_t vnode_object;
-
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_data_request: %x, %x, %x, %x\n", mem_obj, offset, length, protection_required));
+ vnode_pager_t vnode_object;
+ memory_object_offset_t base_offset;
+ vm_size_t size;
+ uint32_t io_streaming = 0;
vnode_object = vnode_pager_lookup(mem_obj);
- PAGER_DEBUG(PAGER_PAGEIN, ("vnode_pager_data_request: %x, %x, %x, %x, vnode_object %x\n", mem_obj, offset, length, protection_required, vnode_object));
-
- vnode_pager_cluster_read(vnode_object, offset, length);
+ size = MAX_UPL_TRANSFER_BYTES;
+ base_offset = offset;
- return KERN_SUCCESS;
+ if (memory_object_cluster_size(vnode_object->control_handle, &base_offset, &size, &io_streaming, fault_info) != KERN_SUCCESS)
+ size = PAGE_SIZE;
+
+ assert(offset >= base_offset &&
+ offset < base_offset + size);
+
+ return vnode_pager_cluster_read(vnode_object, base_offset, offset, io_streaming, size);
}
/*
{
register vnode_pager_t vnode_object;
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_deallocate: %x\n", mem_obj));
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_deallocate: %p\n", mem_obj));
vnode_object = vnode_pager_lookup(mem_obj);
if (hw_atomic_sub(&vnode_object->ref_count, 1) == 0) {
- if (vnode_object->vnode_handle != (vnode_port_t) NULL) {
+ if (vnode_object->vnode_handle != NULL) {
vnode_pager_vrele(vnode_object->vnode_handle);
}
- zfree(vnode_pager_zone, (vm_offset_t) vnode_object);
+ zfree(vnode_pager_zone, vnode_object);
}
return;
}
*/
kern_return_t
vnode_pager_terminate(
+#if !DEBUG
+ __unused
+#endif
memory_object_t mem_obj)
{
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_terminate: %x\n", mem_obj));
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_terminate: %p\n", mem_obj));
return(KERN_SUCCESS);
}
vnode_pager_synchronize(
memory_object_t mem_obj,
memory_object_offset_t offset,
- vm_size_t length,
- vm_sync_t sync_flags)
+ memory_object_size_t length,
+ __unused vm_sync_t sync_flags)
{
register vnode_pager_t vnode_object;
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_synchronize: %x\n", mem_obj));
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_synchronize: %p\n", mem_obj));
vnode_object = vnode_pager_lookup(mem_obj);
*
*/
kern_return_t
-vnode_pager_unmap(
+vnode_pager_map(
+ memory_object_t mem_obj,
+ vm_prot_t prot)
+{
+ vnode_pager_t vnode_object;
+ int ret;
+ kern_return_t kr;
+
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_map: %p %x\n", mem_obj, prot));
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+
+ ret = ubc_map(vnode_object->vnode_handle, prot);
+
+ if (ret != 0) {
+ kr = KERN_FAILURE;
+ } else {
+ kr = KERN_SUCCESS;
+ }
+
+ return kr;
+}
+
+kern_return_t
+vnode_pager_last_unmap(
memory_object_t mem_obj)
{
register vnode_pager_t vnode_object;
- PAGER_DEBUG(PAGER_ALL, ("vnode_pager_unmap: %x\n", mem_obj));
+ PAGER_DEBUG(PAGER_ALL, ("vnode_pager_last_unmap: %p\n", mem_obj));
vnode_object = vnode_pager_lookup(mem_obj);
}
+
/*
*
*/
vnode_pager_cluster_write(
vnode_pager_t vnode_object,
vm_object_offset_t offset,
- vm_size_t cnt)
+ vm_size_t cnt,
+ vm_object_offset_t * resid_offset,
+ int * io_error,
+ int upl_flags)
{
- int error = 0;
- int local_error = 0;
- int kret;
- int size;
+ vm_size_t size;
+ int errno;
- if (cnt & PAGE_MASK) {
- panic("vs_cluster_write: cnt not a multiple of PAGE_SIZE");
- }
- size = (cnt < (PAGE_SIZE*32)) ? cnt : (PAGE_SIZE*32); /* effective min */
-
- while (cnt) {
+ if (upl_flags & UPL_MSYNC) {
- kret = vnode_pageout(vnode_object->vnode_handle,
- (upl_t )NULL, (vm_offset_t)NULL,
- offset, size, 0, &local_error);
-/*
- if(kret == PAGER_ABSENT) {
- Need to work out the defs here, 1 corresponds to
- PAGER_ABSENT defined in bsd/vm/vm_pager.h However,
- we should not be including that file here it is a
- layering violation.
-*/
- if(kret == 1) {
- int uplflags;
- upl_t upl = NULL;
- int count = 0;
- kern_return_t kr;
-
- uplflags = (UPL_NO_SYNC | UPL_CLEAN_IN_PLACE |
- UPL_SET_INTERNAL | UPL_COPYOUT_FROM);
- count = 0;
- kr = memory_object_upl_request(
- vnode_object->control_handle,
- offset, size, &upl, NULL, &count, uplflags);
- if(kr != KERN_SUCCESS) {
- panic("vnode_pager_cluster_write: upl request failed\n");
- }
- upl_abort(upl, 0);
- upl_deallocate(upl);
+ upl_flags |= UPL_VNODE_PAGER;
- error = 0;
- local_error = 0;
- }
+ if ( (upl_flags & UPL_IOSYNC) && io_error)
+ upl_flags |= UPL_KEEPCACHED;
+
+ while (cnt) {
+ size = (cnt < MAX_UPL_TRANSFER_BYTES) ? cnt : MAX_UPL_TRANSFER_BYTES; /* effective max */
- if (local_error != 0) {
- error = local_error;
- local_error = 0;
+ assert((upl_size_t) size == size);
+ vnode_pageout(vnode_object->vnode_handle,
+ NULL, (upl_offset_t)0, offset, (upl_size_t)size, upl_flags, &errno);
+
+ if ( (upl_flags & UPL_KEEPCACHED) ) {
+ if ( (*io_error = errno) )
+ break;
+ }
+ cnt -= size;
+ offset += size;
+ }
+ if (resid_offset)
+ *resid_offset = offset;
+
+ } else {
+ vm_object_offset_t vnode_size;
+ vm_object_offset_t base_offset;
+
+ /*
+ * this is the pageout path
+ */
+ vnode_size = vnode_pager_get_filesize(vnode_object->vnode_handle);
+
+ if (vnode_size > (offset + PAGE_SIZE)) {
+ /*
+ * preset the maximum size of the cluster
+ * and put us on a nice cluster boundary...
+ * and then clip the size to insure we
+ * don't request past the end of the underlying file
+ */
+ size = MAX_UPL_TRANSFER_BYTES;
+ base_offset = offset & ~((signed)(size - 1));
+
+ if ((base_offset + size) > vnode_size)
+ size = round_page(((vm_size_t)(vnode_size - base_offset)));
+ } else {
+ /*
+ * we've been requested to page out a page beyond the current
+ * end of the 'file'... don't try to cluster in this case...
+ * we still need to send this page through because it might
+ * be marked precious and the underlying filesystem may need
+ * to do something with it (besides page it out)...
+ */
+ base_offset = offset;
+ size = PAGE_SIZE;
}
- cnt -= size;
- offset += size;
- size = (cnt < (PAGE_SIZE*32)) ? cnt : (PAGE_SIZE*32); /* effective min */
+ assert((upl_size_t) size == size);
+ vnode_pageout(vnode_object->vnode_handle,
+ NULL, (upl_offset_t)(offset - base_offset), base_offset, (upl_size_t) size,
+ (upl_flags & UPL_IOSYNC) | UPL_VNODE_PAGER, NULL);
}
-#if 0
- if (error != 0)
- return(KERN_FAILURE);
-
- return(KERN_SUCCESS);
-#endif /* 0 */
}
kern_return_t
vnode_pager_cluster_read(
vnode_pager_t vnode_object,
+ vm_object_offset_t base_offset,
vm_object_offset_t offset,
+ uint32_t io_streaming,
vm_size_t cnt)
{
- int error = 0;
int local_error = 0;
int kret;
+ int flags = 0;
- if(cnt & PAGE_MASK) {
- panic("vs_cluster_read: cnt not a multiple of PAGE_SIZE");
- }
+ assert(! (cnt & PAGE_MASK));
+
+ if (io_streaming)
+ flags |= UPL_IOSTREAMING;
- kret = vnode_pagein(vnode_object->vnode_handle, (upl_t)NULL, (vm_offset_t)NULL, offset, cnt, 0, &local_error);
+ assert((upl_size_t) cnt == cnt);
+ kret = vnode_pagein(vnode_object->vnode_handle,
+ (upl_t) NULL,
+ (upl_offset_t) (offset - base_offset),
+ base_offset,
+ (upl_size_t) cnt,
+ flags,
+ &local_error);
/*
if(kret == PAGER_ABSENT) {
Need to work out the defs here, 1 corresponds to PAGER_ABSENT
defined in bsd/vm/vm_pager.h However, we should not be including
that file here it is a layering violation.
*/
- if(kret == 1) {
- int uplflags;
- upl_t upl = NULL;
- int count = 0;
- kern_return_t kr;
-
- uplflags = (UPL_NO_SYNC |
- UPL_CLEAN_IN_PLACE | UPL_SET_INTERNAL);
- count = 0;
- kr = memory_object_upl_request(
- vnode_object->control_handle, offset, cnt,
- &upl, NULL, &count, uplflags);
- if(kr != KERN_SUCCESS) {
- panic("vnode_pager_cluster_read: upl request failed\n");
- }
+ if (kret == 1) {
+ int uplflags;
+ upl_t upl = NULL;
+ unsigned int count = 0;
+ kern_return_t kr;
+
+ uplflags = (UPL_NO_SYNC |
+ UPL_CLEAN_IN_PLACE |
+ UPL_SET_INTERNAL);
+ count = 0;
+ assert((upl_size_t) cnt == cnt);
+ kr = memory_object_upl_request(vnode_object->control_handle,
+ base_offset, (upl_size_t) cnt,
+ &upl, NULL, &count, uplflags);
+ if (kr == KERN_SUCCESS) {
upl_abort(upl, 0);
upl_deallocate(upl);
+ } else {
+ /*
+ * We couldn't gather the page list, probably
+ * because the memory object doesn't have a link
+ * to a VM object anymore (forced unmount, for
+ * example). Just return an error to the vm_fault()
+ * path and let it handle it.
+ */
+ }
- error = 1;
+ return KERN_FAILURE;
}
- if (error != 0)
- return(KERN_FAILURE);
-
- return(KERN_SUCCESS);
+ return KERN_SUCCESS;
}
int *cnt)
{
memory_object_free_from_cache(
- &realhost, &vnode_pager_workaround, cnt);
+ &realhost, &vnode_pager_ops, cnt);
}
/*
*/
vnode_pager_t
vnode_object_create(
- vnode_port_t vp)
+ struct vnode *vp)
{
register vnode_pager_t vnode_object;
* The vm_map call takes both named entry ports and raw memory
* objects in the same parameter. We need to make sure that
* vm_map does not see this object as a named entry port. So,
- * we reserve the second word in the object for a fake ip_kotype
+ * we reserve the first word in the object for a fake ip_kotype
* setting - that will tell vm_map to use it as a memory object.
*/
- vnode_object->pager = &vnode_pager_workaround;
+ vnode_object->pager_ops = &vnode_pager_ops;
vnode_object->pager_ikot = IKOT_MEMORY_OBJECT;
vnode_object->ref_count = 1;
vnode_object->control_handle = MEMORY_OBJECT_CONTROL_NULL;
vnode_pager_t vnode_object;
vnode_object = (vnode_pager_t)name;
- assert(vnode_object->pager == &vnode_pager_workaround);
+ assert(vnode_object->pager_ops == &vnode_pager_ops);
return (vnode_object);
}
+
+/*********************** proc_info implementation *************/
+
+#include <sys/bsdtask_info.h>
+
+static int fill_vnodeinfoforaddr( vm_map_entry_t entry, uintptr_t * vnodeaddr, uint32_t * vid);
+
+
+int
+fill_procregioninfo(task_t task, uint64_t arg, struct proc_regioninfo_internal *pinfo, uintptr_t *vnodeaddr, uint32_t *vid)
+{
+
+ vm_map_t map;
+ vm_map_offset_t address = (vm_map_offset_t )arg;
+ vm_map_entry_t tmp_entry;
+ vm_map_entry_t entry;
+ vm_map_offset_t start;
+ vm_region_extended_info_data_t extended;
+ vm_region_top_info_data_t top;
+
+ task_lock(task);
+ map = task->map;
+ if (map == VM_MAP_NULL)
+ {
+ task_unlock(task);
+ return(0);
+ }
+ vm_map_reference(map);
+ task_unlock(task);
+
+ vm_map_lock_read(map);
+
+ start = address;
+ if (!vm_map_lookup_entry(map, start, &tmp_entry)) {
+ if ((entry = tmp_entry->vme_next) == vm_map_to_entry(map)) {
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(0);
+ }
+ } else {
+ entry = tmp_entry;
+ }
+
+ start = entry->vme_start;
+
+ pinfo->pri_offset = VME_OFFSET(entry);
+ pinfo->pri_protection = entry->protection;
+ pinfo->pri_max_protection = entry->max_protection;
+ pinfo->pri_inheritance = entry->inheritance;
+ pinfo->pri_behavior = entry->behavior;
+ pinfo->pri_user_wired_count = entry->user_wired_count;
+ pinfo->pri_user_tag = VME_ALIAS(entry);
+
+ if (entry->is_sub_map) {
+ pinfo->pri_flags |= PROC_REGION_SUBMAP;
+ } else {
+ if (entry->is_shared)
+ pinfo->pri_flags |= PROC_REGION_SHARED;
+ }
+
+
+ extended.protection = entry->protection;
+ extended.user_tag = VME_ALIAS(entry);
+ extended.pages_resident = 0;
+ extended.pages_swapped_out = 0;
+ extended.pages_shared_now_private = 0;
+ extended.pages_dirtied = 0;
+ extended.external_pager = 0;
+ extended.shadow_depth = 0;
+
+ vm_map_region_walk(map, start, entry, VME_OFFSET(entry), entry->vme_end - start, &extended);
+
+ if (extended.external_pager && extended.ref_count == 2 && extended.share_mode == SM_SHARED)
+ extended.share_mode = SM_PRIVATE;
+
+ top.private_pages_resident = 0;
+ top.shared_pages_resident = 0;
+ vm_map_region_top_walk(entry, &top);
+
+
+ pinfo->pri_pages_resident = extended.pages_resident;
+ pinfo->pri_pages_shared_now_private = extended.pages_shared_now_private;
+ pinfo->pri_pages_swapped_out = extended.pages_swapped_out;
+ pinfo->pri_pages_dirtied = extended.pages_dirtied;
+ pinfo->pri_ref_count = extended.ref_count;
+ pinfo->pri_shadow_depth = extended.shadow_depth;
+ pinfo->pri_share_mode = extended.share_mode;
+
+ pinfo->pri_private_pages_resident = top.private_pages_resident;
+ pinfo->pri_shared_pages_resident = top.shared_pages_resident;
+ pinfo->pri_obj_id = top.obj_id;
+
+ pinfo->pri_address = (uint64_t)start;
+ pinfo->pri_size = (uint64_t)(entry->vme_end - start);
+ pinfo->pri_depth = 0;
+
+ if ((vnodeaddr != 0) && (entry->is_sub_map == 0)) {
+ *vnodeaddr = (uintptr_t)0;
+
+ if (fill_vnodeinfoforaddr(entry, vnodeaddr, vid) ==0) {
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(1);
+ }
+ }
+
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(1);
+}
+
+int
+fill_procregioninfo_onlymappedvnodes(task_t task, uint64_t arg, struct proc_regioninfo_internal *pinfo, uintptr_t *vnodeaddr, uint32_t *vid)
+{
+
+ vm_map_t map;
+ vm_map_offset_t address = (vm_map_offset_t )arg;
+ vm_map_entry_t tmp_entry;
+ vm_map_entry_t entry;
+
+ task_lock(task);
+ map = task->map;
+ if (map == VM_MAP_NULL)
+ {
+ task_unlock(task);
+ return(0);
+ }
+ vm_map_reference(map);
+ task_unlock(task);
+
+ vm_map_lock_read(map);
+
+ if (!vm_map_lookup_entry(map, address, &tmp_entry)) {
+ if ((entry = tmp_entry->vme_next) == vm_map_to_entry(map)) {
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(0);
+ }
+ } else {
+ entry = tmp_entry;
+ }
+
+ while (entry != vm_map_to_entry(map)) {
+ *vnodeaddr = 0;
+ *vid = 0;
+
+ if (entry->is_sub_map == 0) {
+ if (fill_vnodeinfoforaddr(entry, vnodeaddr, vid)) {
+
+ pinfo->pri_offset = VME_OFFSET(entry);
+ pinfo->pri_protection = entry->protection;
+ pinfo->pri_max_protection = entry->max_protection;
+ pinfo->pri_inheritance = entry->inheritance;
+ pinfo->pri_behavior = entry->behavior;
+ pinfo->pri_user_wired_count = entry->user_wired_count;
+ pinfo->pri_user_tag = VME_ALIAS(entry);
+
+ if (entry->is_shared)
+ pinfo->pri_flags |= PROC_REGION_SHARED;
+
+ pinfo->pri_pages_resident = 0;
+ pinfo->pri_pages_shared_now_private = 0;
+ pinfo->pri_pages_swapped_out = 0;
+ pinfo->pri_pages_dirtied = 0;
+ pinfo->pri_ref_count = 0;
+ pinfo->pri_shadow_depth = 0;
+ pinfo->pri_share_mode = 0;
+
+ pinfo->pri_private_pages_resident = 0;
+ pinfo->pri_shared_pages_resident = 0;
+ pinfo->pri_obj_id = 0;
+
+ pinfo->pri_address = (uint64_t)entry->vme_start;
+ pinfo->pri_size = (uint64_t)(entry->vme_end - entry->vme_start);
+ pinfo->pri_depth = 0;
+
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(1);
+ }
+ }
+
+ /* Keep searching for a vnode-backed mapping */
+ entry = entry->vme_next;
+ }
+
+ vm_map_unlock_read(map);
+ vm_map_deallocate(map);
+ return(0);
+}
+
+static int
+fill_vnodeinfoforaddr(
+ vm_map_entry_t entry,
+ uintptr_t * vnodeaddr,
+ uint32_t * vid)
+{
+ vm_object_t top_object, object;
+ memory_object_t memory_object;
+ memory_object_pager_ops_t pager_ops;
+ kern_return_t kr;
+ int shadow_depth;
+
+
+ if (entry->is_sub_map) {
+ return(0);
+ } else {
+ /*
+ * The last object in the shadow chain has the
+ * relevant pager information.
+ */
+ top_object = VME_OBJECT(entry);
+ if (top_object == VM_OBJECT_NULL) {
+ object = VM_OBJECT_NULL;
+ shadow_depth = 0;
+ } else {
+ vm_object_lock(top_object);
+ for (object = top_object, shadow_depth = 0;
+ object->shadow != VM_OBJECT_NULL;
+ object = object->shadow, shadow_depth++) {
+ vm_object_lock(object->shadow);
+ vm_object_unlock(object);
+ }
+ }
+ }
+
+ if (object == VM_OBJECT_NULL) {
+ return(0);
+ } else if (object->internal) {
+ vm_object_unlock(object);
+ return(0);
+ } else if (! object->pager_ready ||
+ object->terminating ||
+ ! object->alive) {
+ vm_object_unlock(object);
+ return(0);
+ } else {
+ memory_object = object->pager;
+ pager_ops = memory_object->mo_pager_ops;
+ if (pager_ops == &vnode_pager_ops) {
+ kr = vnode_pager_get_object_vnode(
+ memory_object,
+ vnodeaddr, vid);
+ if (kr != KERN_SUCCESS) {
+ vm_object_unlock(object);
+ return(0);
+ }
+ } else {
+ vm_object_unlock(object);
+ return(0);
+ }
+ }
+ vm_object_unlock(object);
+ return(1);
+}
+
+kern_return_t
+vnode_pager_get_object_vnode (
+ memory_object_t mem_obj,
+ uintptr_t * vnodeaddr,
+ uint32_t * vid)
+{
+ vnode_pager_t vnode_object;
+
+ vnode_object = vnode_pager_lookup(mem_obj);
+ if (vnode_object->vnode_handle) {
+ *vnodeaddr = (uintptr_t)vnode_object->vnode_handle;
+ *vid = (uint32_t)vnode_vid((void *)vnode_object->vnode_handle);
+
+ return(KERN_SUCCESS);
+ }
+
+ return(KERN_FAILURE);
+}
+
+#if CONFIG_IOSCHED
+kern_return_t
+vnode_pager_get_object_devvp(
+ memory_object_t mem_obj,
+ uintptr_t *devvp)
+{
+ struct vnode *vp;
+ uint32_t vid;
+
+ if(vnode_pager_get_object_vnode(mem_obj, (uintptr_t *)&vp, (uint32_t *)&vid) != KERN_SUCCESS)
+ return (KERN_FAILURE);
+ *devvp = (uintptr_t)vnode_mountdevvp(vp);
+ if (*devvp)
+ return (KERN_SUCCESS);
+ return (KERN_FAILURE);
+}
+#endif
+
+/*
+ * Find the underlying vnode object for the given vm_map_entry. If found, return with the
+ * object locked, otherwise return NULL with nothing locked.
+ */
+
+vm_object_t
+find_vnode_object(
+ vm_map_entry_t entry
+)
+{
+ vm_object_t top_object, object;
+ memory_object_t memory_object;
+ memory_object_pager_ops_t pager_ops;
+
+ if (!entry->is_sub_map) {
+
+ /*
+ * The last object in the shadow chain has the
+ * relevant pager information.
+ */
+
+ top_object = VME_OBJECT(entry);
+
+ if (top_object) {
+ vm_object_lock(top_object);
+
+ for (object = top_object; object->shadow != VM_OBJECT_NULL; object = object->shadow) {
+ vm_object_lock(object->shadow);
+ vm_object_unlock(object);
+ }
+
+ if (object && !object->internal && object->pager_ready && !object->terminating &&
+ object->alive) {
+ memory_object = object->pager;
+ pager_ops = memory_object->mo_pager_ops;
+
+ /*
+ * If this object points to the vnode_pager_ops, then we found what we're
+ * looking for. Otherwise, this vm_map_entry doesn't have an underlying
+ * vnode and so we fall through to the bottom and return NULL.
+ */
+
+ if (pager_ops == &vnode_pager_ops)
+ return object; /* we return with the object locked */
+ }
+
+ vm_object_unlock(object);
+ }
+
+ }
+
+ return(VM_OBJECT_NULL);
+}
projects / apple / xnu.git / blobdiff