/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/ubc_internal.h>
#include <sys/malloc.h>
+#include <sys/user.h>
#include <default_pager/default_pager_types.h>
-#include <default_pager/default_pager_object.h>
-#include <bsm/audit_kernel.h>
+#include <security/audit/audit.h>
#include <bsm/audit_kevents.h>
#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <kern/kern_types.h>
+#include <kern/locks.h>
#include <kern/host.h>
#include <kern/task.h>
#include <kern/zalloc.h>
#include <kern/kalloc.h>
-#include <kern/assert.h>
+#include <kern/policy_internal.h>
#include <libkern/libkern.h>
#include <vm/vm_kern.h>
#include <vm/vnode_pager.h>
#include <vm/vm_protos.h>
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
-extern thread_t current_act(void);
-
-/*
- * temporary support for delayed instantiation
- * of default_pager
- */
-int default_pager_init_flag = 0;
-
-struct bs_map bs_port_table[MAX_BACKING_STORE] = {
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
- {0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}};
-
-/* ###################################################### */
+#include <pexpert/pexpert.h>
/*
*/
int
macx_backing_store_recovery(
- struct macx_backing_store_recovery_args *args)
+ __unused struct macx_backing_store_recovery_args *args)
{
- int pid = args->pid;
- int error;
- struct proc *p = current_proc();
- boolean_t funnel_state;
-
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
- if ((error = suser(kauth_cred_get(), 0)))
- goto backing_store_recovery_return;
-
- /* for now restrict backing_store_recovery */
- /* usage to only present task */
- if(pid != proc_selfpid()) {
- error = EINVAL;
- goto backing_store_recovery_return;
- }
-
- task_backing_store_privileged(p->task);
-
-backing_store_recovery_return:
- (void) thread_funnel_set(kernel_flock, FALSE);
- return(error);
+ return ENOTSUP;
}
/*
int
macx_backing_store_suspend(
- struct macx_backing_store_suspend_args *args)
+ __unused struct macx_backing_store_suspend_args *args)
{
- boolean_t suspend = args->suspend;
- int error;
- boolean_t funnel_state;
-
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
- if ((error = suser(kauth_cred_get(), 0)))
- goto backing_store_suspend_return;
+ return ENOTSUP;
+}
- vm_backing_store_disable(suspend);
-backing_store_suspend_return:
- (void) thread_funnel_set(kernel_flock, FALSE);
- return(error);
-}
+extern boolean_t compressor_store_stop_compaction;
/*
- * Routine: macx_swapon
+ * Routine: macx_backing_store_compaction
* Function:
- * Syscall interface to add a file to backing store
+ * Turn compaction of swap space on or off. This is
+ * used during shutdown/restart so that the kernel
+ * doesn't waste time compacting swap files that are
+ * about to be deleted anyway. Compaction is always
+ * on by default when the system comes up and is turned
+ * off when a shutdown/restart is requested. It is
+ * re-enabled if the shutdown/restart is aborted for any reason.
+ *
+ * This routine assumes macx_lock has been locked by macx_triggers ->
+ * mach_macx_triggers -> macx_backing_store_compaction
*/
+
int
-macx_swapon(
- struct macx_swapon_args *args)
+macx_backing_store_compaction(int flags)
{
- int size = args->size;
- vnode_t vp = (vnode_t)NULL;
- struct nameidata nd, *ndp;
- struct proc *p = current_proc();
- register int error;
- kern_return_t kr;
- mach_port_t backing_store;
- memory_object_default_t default_pager;
- int i;
- boolean_t funnel_state;
- off_t file_size;
- struct vfs_context context;
-
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
-
- AUDIT_MACH_SYSCALL_ENTER(AUE_SWAPON);
- AUDIT_ARG(value, args->priority);
-
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
- ndp = &nd;
+ int error;
if ((error = suser(kauth_cred_get(), 0)))
- goto swapon_bailout;
+ return error;
- if(default_pager_init_flag == 0) {
- start_def_pager(NULL);
- default_pager_init_flag = 1;
- }
+ if (flags & SWAP_COMPACT_DISABLE) {
+ compressor_store_stop_compaction = TRUE;
- /*
- * Get a vnode for the paging area.
- */
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
- ((IS_64BIT_PROCESS(p)) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- CAST_USER_ADDR_T(args->filename), &context);
-
- if ((error = namei(ndp)))
- goto swapon_bailout;
- nameidone(ndp);
- vp = ndp->ni_vp;
-
- if (vp->v_type != VREG) {
- error = EINVAL;
- goto swapon_bailout;
- }
- UBCINFOCHECK("macx_swapon", vp);
-
- /* get file size */
- if ((error = vnode_size(vp, &file_size, &context)) != 0)
- goto swapon_bailout;
-
- /* resize to desired size if it's too small */
- if ((file_size < (off_t)size) && ((error = vnode_setsize(vp, (off_t)size, 0, &context)) != 0))
- goto swapon_bailout;
-
- /* add new backing store to list */
- i = 0;
- while(bs_port_table[i].vp != 0) {
- if(i == MAX_BACKING_STORE)
- break;
- i++;
- }
- if(i == MAX_BACKING_STORE) {
- error = ENOMEM;
- goto swapon_bailout;
- }
-
- /* remember the vnode. This vnode has namei() reference */
- bs_port_table[i].vp = vp;
-
- /*
- * Look to see if we are already paging to this file.
- */
- /* make certain the copy send of kernel call will work */
- default_pager = MEMORY_OBJECT_DEFAULT_NULL;
- kr = host_default_memory_manager(host_priv_self(), &default_pager, 0);
- if(kr != KERN_SUCCESS) {
- error = EAGAIN;
- bs_port_table[i].vp = 0;
- goto swapon_bailout;
- }
+ kprintf("compressor_store_stop_compaction = TRUE\n");
- kr = default_pager_backing_store_create(default_pager,
- -1, /* default priority */
- 0, /* default cluster size */
- &backing_store);
- memory_object_default_deallocate(default_pager);
+ } else if (flags & SWAP_COMPACT_ENABLE) {
+ compressor_store_stop_compaction = FALSE;
- if(kr != KERN_SUCCESS) {
- error = ENOMEM;
- bs_port_table[i].vp = 0;
- goto swapon_bailout;
+ kprintf("compressor_store_stop_compaction = FALSE\n");
}
- /*
- * NOTE: we are able to supply PAGE_SIZE here instead of
- * an actual record size or block number because:
- * a: we do not support offsets from the beginning of the
- * file (allowing for non page size/record modulo offsets.
- * b: because allow paging will be done modulo page size
- */
-
- kr = default_pager_add_file(backing_store, (vnode_ptr_t) vp,
- PAGE_SIZE, (int)(file_size/PAGE_SIZE));
- if(kr != KERN_SUCCESS) {
- bs_port_table[i].vp = 0;
- if(kr == KERN_INVALID_ARGUMENT)
- error = EINVAL;
- else
- error = ENOMEM;
- goto swapon_bailout;
- }
- bs_port_table[i].bs = (void *)backing_store;
- error = 0;
+ return 0;
+}
- /* Mark this vnode as being used for swapfile */
- SET(vp->v_flag, VSWAP);
+/*
+ * Routine: macx_triggers
+ * Function:
+ * Syscall interface to set the call backs for low and
+ * high water marks.
+ */
+int
+macx_triggers(
+ struct macx_triggers_args *args)
+{
+ int flags = args->flags;
- ubc_setthreadcred(vp, p, current_thread());
+ if (flags & (SWAP_COMPACT_DISABLE | SWAP_COMPACT_ENABLE))
+ return (macx_backing_store_compaction(flags));
- /*
- * take a long term reference on the vnode to keep
- * vnreclaim() away from this vnode.
- */
- vnode_ref(vp);
+ return ENOTSUP;
+}
-swapon_bailout:
- if (vp) {
- vnode_put(vp);
- }
- (void) thread_funnel_set(kernel_flock, FALSE);
- AUDIT_MACH_SYSCALL_EXIT(error);
- return(error);
+
+int
+macx_swapon(
+ __unused struct macx_swapon_args *args)
+{
+ return ENOTSUP;
}
+
/*
* Routine: macx_swapoff
* Function:
*/
int
macx_swapoff(
- struct macx_swapoff_args *args)
+ __unused struct macx_swapoff_args *args)
{
- __unused int flags = args->flags;
- kern_return_t kr;
- mach_port_t backing_store;
-
- struct vnode *vp = 0;
- struct nameidata nd, *ndp;
- struct proc *p = current_proc();
- int i;
- int error;
- boolean_t funnel_state;
- struct vfs_context context;
-
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
-
- AUDIT_MACH_SYSCALL_ENTER(AUE_SWAPOFF);
-
- funnel_state = thread_funnel_set(kernel_flock, TRUE);
- backing_store = NULL;
- ndp = &nd;
-
- if ((error = suser(kauth_cred_get(), 0)))
- goto swapoff_bailout;
-
- /*
- * Get the vnode for the paging area.
- */
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
- ((IS_64BIT_PROCESS(p)) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- CAST_USER_ADDR_T(args->filename), &context);
-
- if ((error = namei(ndp)))
- goto swapoff_bailout;
- nameidone(ndp);
- vp = ndp->ni_vp;
-
- if (vp->v_type != VREG) {
- error = EINVAL;
- goto swapoff_bailout;
- }
-
- for(i = 0; i < MAX_BACKING_STORE; i++) {
- if(bs_port_table[i].vp == vp) {
- break;
- }
- }
- if (i == MAX_BACKING_STORE) {
- error = EINVAL;
- goto swapoff_bailout;
- }
- backing_store = (mach_port_t)bs_port_table[i].bs;
-
- kr = default_pager_backing_store_delete(backing_store);
- switch (kr) {
- case KERN_SUCCESS:
- error = 0;
- bs_port_table[i].vp = 0;
- /* This vnode is no longer used for swapfile */
- CLR(vp->v_flag, VSWAP);
-
- /* get rid of macx_swapon() "long term" reference */
- vnode_rele(vp);
-
- break;
- case KERN_FAILURE:
- error = EAGAIN;
- break;
- default:
- error = EAGAIN;
- break;
- }
-
-swapoff_bailout:
- /* get rid of macx_swapoff() namei() reference */
- if (vp)
- vnode_put(vp);
-
- (void) thread_funnel_set(kernel_flock, FALSE);
- AUDIT_MACH_SYSCALL_EXIT(error);
- return(error);
+ return ENOTSUP;
}
/*
* Function:
* Syscall interface to get general swap statistics
*/
+extern uint64_t vm_swap_get_total_space(void);
+extern uint64_t vm_swap_get_free_space(void);
+extern boolean_t vm_swap_up;
+
int
macx_swapinfo(
memory_object_size_t *total_p,
vm_size_t *pagesize_p,
boolean_t *encrypted_p)
{
- int error;
- memory_object_default_t default_pager;
- default_pager_info_64_t dpi64;
- kern_return_t kr;
-
- error = 0;
-
- /*
- * Get a handle on the default pager.
- */
- default_pager = MEMORY_OBJECT_DEFAULT_NULL;
- kr = host_default_memory_manager(host_priv_self(), &default_pager, 0);
- if (kr != KERN_SUCCESS) {
- error = EAGAIN; /* XXX why EAGAIN ? */
- goto done;
- }
- if (default_pager == MEMORY_OBJECT_DEFAULT_NULL) {
- /*
- * The default pager has not initialized yet,
- * so it can't be using any swap space at all.
- */
- *total_p = 0;
- *avail_p = 0;
- *pagesize_p = 0;
- *encrypted_p = FALSE;
- goto done;
- }
-
- /*
- * Get swap usage data from default pager.
- */
- kr = default_pager_info_64(default_pager, &dpi64);
- if (kr != KERN_SUCCESS) {
- error = ENOTSUP;
- goto done;
- }
+ if (VM_CONFIG_SWAP_IS_PRESENT) {
- /*
- * Provide default pager info to caller.
- */
- *total_p = dpi64.dpi_total_space;
- *avail_p = dpi64.dpi_free_space;
- *pagesize_p = dpi64.dpi_page_size;
- if (dpi64.dpi_flags & DPI_ENCRYPTED) {
+ *total_p = vm_swap_get_total_space();
+ *avail_p = vm_swap_get_free_space();
+ *pagesize_p = (vm_size_t)PAGE_SIZE_64;
*encrypted_p = TRUE;
+
} else {
+
+ *total_p = 0;
+ *avail_p = 0;
+ *pagesize_p = 0;
*encrypted_p = FALSE;
}
-
-done:
- if (default_pager != MEMORY_OBJECT_DEFAULT_NULL) {
- /* release our handle on default pager */
- memory_object_default_deallocate(default_pager);
- }
- return error;
+ return 0;
}
projects / apple / xnu.git / blobdiff