/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @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@
+ */
+/*
+ * 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/namei.h>
#include <sys/ubc_internal.h>
#include <sys/malloc.h>
+#include <sys/user.h>
+#if CONFIG_PROTECT
+#include <sys/cprotect.h>
+#endif
#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 <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);
+void kprintf(const char *fmt, ...);
/*
* temporary support for delayed instantiation
return(error);
}
+extern boolean_t backing_store_stop_compaction;
+extern boolean_t compressor_store_stop_compaction;
+
+/*
+ * Routine: macx_backing_store_compaction
+ * Function:
+ * 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.
+ */
+
+int
+macx_backing_store_compaction(int flags)
+{
+ int error;
+
+ if ((error = suser(kauth_cred_get(), 0)))
+ return error;
+
+ if (flags & SWAP_COMPACT_DISABLE) {
+ backing_store_stop_compaction = TRUE;
+ compressor_store_stop_compaction = TRUE;
+
+ kprintf("backing_store_stop_compaction = TRUE\n");
+
+ } else if (flags & SWAP_COMPACT_ENABLE) {
+ backing_store_stop_compaction = FALSE;
+ compressor_store_stop_compaction = FALSE;
+
+ kprintf("backing_store_stop_compaction = FALSE\n");
+ }
+
+ return 0;
+}
+
+/*
+ * 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 error;
+
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return error;
+
+ return mach_macx_triggers(args);
+}
+
+
+extern boolean_t dp_isssd;
+extern void vm_swap_init(void);
+extern int vm_compressor_mode;
+
+/*
+ * In the compressed pager world, the swapfiles are created by the kernel.
+ * Well, all except the first one. That swapfile is absorbed by the kernel at
+ * the end of the macx_swapon function (if swap is enabled). That's why
+ * we allow the first invocation of macx_swapon to succeed.
+ *
+ * If the compressor pool is running low, the kernel messages the dynamic pager
+ * on the port it has registered with the kernel. That port can transport 1 of 2
+ * pieces of information to dynamic pager: create a swapfile or delete a swapfile.
+ *
+ * We choose to transmit the former. So, that message tells dynamic pager
+ * to create a swapfile and activate it by calling macx_swapon.
+ *
+ * We deny this new macx_swapon request. That leads dynamic pager to interpret the
+ * failure as a serious error and notify all it's clients that swap is running low.
+ * That's how we get the loginwindow "Resume / Force Quit Applications" dialog to appear.
+ *
+ * NOTE:
+ * If the kernel has already created multiple swapfiles by the time the compressor
+ * pool is running low (and it has to play this trick), dynamic pager won't be able to
+ * create a file in user-space and, that too will lead to a similar notification blast
+ * to all of it's clients. So, that behaves as desired too.
+ */
+boolean_t macx_swapon_allowed = TRUE;
+
/*
* Routine: macx_swapon
* Function:
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;
int i;
boolean_t funnel_state;
off_t file_size;
- struct vfs_context context;
-
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
+ vfs_context_t ctx = vfs_context_current();
+ struct proc *p = current_proc();
+ int dp_cluster_size;
+
+ if (COMPRESSED_PAGER_IS_ACTIVE) {
+ if (macx_swapon_allowed == FALSE) {
+ return EINVAL;
+ } else {
+ if ((vm_compressor_mode == VM_PAGER_COMPRESSOR_WITH_SWAP) ||
+ (vm_compressor_mode == VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP)) {
+ vm_swap_init();
+ }
+
+ macx_swapon_allowed = FALSE;
+ return 0;
+ }
+ }
AUDIT_MACH_SYSCALL_ENTER(AUE_SWAPON);
- AUDIT_ARG(value, args->priority);
+ AUDIT_ARG(value32, args->priority);
funnel_state = thread_funnel_set(kernel_flock, TRUE);
ndp = &nd;
if ((error = suser(kauth_cred_get(), 0)))
goto swapon_bailout;
- if(default_pager_init_flag == 0) {
- start_def_pager(NULL);
- default_pager_init_flag = 1;
- }
-
/*
* Get a vnode for the paging area.
*/
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
+ NDINIT(ndp, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
((IS_64BIT_PROCESS(p)) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- CAST_USER_ADDR_T(args->filename), &context);
+ (user_addr_t) args->filename, ctx);
if ((error = namei(ndp)))
goto swapon_bailout;
error = EINVAL;
goto swapon_bailout;
}
- UBCINFOCHECK("macx_swapon", vp);
/* get file size */
- if ((error = vnode_size(vp, &file_size, &context)) != 0)
+ if ((error = vnode_size(vp, &file_size, ctx)) != 0)
+ goto swapon_bailout;
+#if CONFIG_MACF
+ vnode_lock(vp);
+ error = mac_system_check_swapon(vfs_context_ucred(ctx), vp);
+ vnode_unlock(vp);
+ if (error)
goto swapon_bailout;
+#endif
/* 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))
+ if ((file_size < (off_t)size) && ((error = vnode_setsize(vp, (off_t)size, 0, ctx)) != 0))
goto swapon_bailout;
+#if CONFIG_PROTECT
+ {
+ /* initialize content protection keys manually */
+ if ((error = cp_handle_vnop(vp, CP_WRITE_ACCESS, 0)) != 0) {
+ goto swapon_bailout;
+ }
+ }
+#endif
+
+
+ if (default_pager_init_flag == 0) {
+ start_def_pager(NULL);
+ default_pager_init_flag = 1;
+ }
+
/* add new backing store to list */
i = 0;
while(bs_port_table[i].vp != 0) {
goto swapon_bailout;
}
+ if ((dp_isssd = vnode_pager_isSSD(vp)) == TRUE) {
+ /*
+ * keep the cluster size small since the
+ * seek cost is effectively 0 which means
+ * we don't care much about fragmentation
+ */
+ dp_cluster_size = 2 * PAGE_SIZE;
+ } else {
+ /*
+ * use the default cluster size
+ */
+ dp_cluster_size = 0;
+ }
kr = default_pager_backing_store_create(default_pager,
-1, /* default priority */
- 0, /* default cluster size */
+ dp_cluster_size,
&backing_store);
memory_object_default_deallocate(default_pager);
goto swapon_bailout;
}
+ /* Mark this vnode as being used for swapfile */
+ vnode_lock_spin(vp);
+ SET(vp->v_flag, VSWAP);
+ vnode_unlock(vp);
+
/*
* NOTE: we are able to supply PAGE_SIZE here instead of
* an actual record size or block number because:
error = EINVAL;
else
error = ENOMEM;
+
+ /* This vnode is not to be used for swapfile */
+ vnode_lock_spin(vp);
+ CLR(vp->v_flag, VSWAP);
+ vnode_unlock(vp);
+
goto swapon_bailout;
}
bs_port_table[i].bs = (void *)backing_store;
error = 0;
- /* Mark this vnode as being used for swapfile */
- SET(vp->v_flag, VSWAP);
-
- ubc_setcred(vp, p);
+ ubc_setthreadcred(vp, p, current_thread());
/*
* take a long term reference on the vnode to keep
}
(void) thread_funnel_set(kernel_flock, FALSE);
AUDIT_MACH_SYSCALL_EXIT(error);
+
+ if (error)
+ printf("macx_swapon FAILED - %d\n", error);
+ else
+ printf("macx_swapon SUCCESS\n");
+
return(error);
}
int i;
int error;
boolean_t funnel_state;
- struct vfs_context context;
-
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
+ vfs_context_t ctx = vfs_context_current();
+ int orig_iopol_disk;
AUDIT_MACH_SYSCALL_ENTER(AUE_SWAPOFF);
/*
* Get the vnode for the paging area.
*/
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
+ NDINIT(ndp, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
((IS_64BIT_PROCESS(p)) ? UIO_USERSPACE64 : UIO_USERSPACE32),
- CAST_USER_ADDR_T(args->filename), &context);
+ (user_addr_t) args->filename, ctx);
if ((error = namei(ndp)))
goto swapoff_bailout;
error = EINVAL;
goto swapoff_bailout;
}
+#if CONFIG_MACF
+ vnode_lock(vp);
+ error = mac_system_check_swapoff(vfs_context_ucred(ctx), vp);
+ vnode_unlock(vp);
+ if (error)
+ goto swapoff_bailout;
+#endif
for(i = 0; i < MAX_BACKING_STORE; i++) {
if(bs_port_table[i].vp == vp) {
}
backing_store = (mach_port_t)bs_port_table[i].bs;
+ orig_iopol_disk = proc_get_task_policy(current_task(), current_thread(),
+ TASK_POLICY_INTERNAL, TASK_POLICY_IOPOL);
+
+ proc_set_task_policy(current_task(), current_thread(), TASK_POLICY_INTERNAL,
+ TASK_POLICY_IOPOL, IOPOL_THROTTLE);
+
kr = default_pager_backing_store_delete(backing_store);
+
+ proc_set_task_policy(current_task(), current_thread(), TASK_POLICY_INTERNAL,
+ TASK_POLICY_IOPOL, orig_iopol_disk);
+
switch (kr) {
case KERN_SUCCESS:
error = 0;
bs_port_table[i].vp = 0;
/* This vnode is no longer used for swapfile */
+ vnode_lock_spin(vp);
CLR(vp->v_flag, VSWAP);
+ vnode_unlock(vp);
/* get rid of macx_swapon() "long term" reference */
vnode_rele(vp);
(void) thread_funnel_set(kernel_flock, FALSE);
AUDIT_MACH_SYSCALL_EXIT(error);
+
+ if (error)
+ printf("macx_swapoff FAILED - %d\n", error);
+ else
+ printf("macx_swapoff SUCCESS\n");
+
return(error);
}
* Function:
* Syscall interface to get general swap statistics
*/
+extern uint64_t vm_swap_get_total_space(void);
+extern uint64_t vm_swap_get_used_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,
kern_return_t kr;
error = 0;
+ if (COMPRESSED_PAGER_IS_ACTIVE) {
+
+ if (vm_swap_up == TRUE) {
+
+ *total_p = vm_swap_get_total_space();
+ *avail_p = vm_swap_get_free_space();
+ *pagesize_p = PAGE_SIZE_64;
+ *encrypted_p = TRUE;
+
+ } else {
+
+ *total_p = 0;
+ *avail_p = 0;
+ *pagesize_p = 0;
+ *encrypted_p = FALSE;
+ }
+ } else {
- /*
- * 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.
+ * Get a handle on the default pager.
*/
- *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;
- }
+ 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;
+ }
- /*
- * 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) {
- *encrypted_p = TRUE;
- } else {
- *encrypted_p = FALSE;
- }
+ /*
+ * 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) {
+ *encrypted_p = TRUE;
+ } else {
+ *encrypted_p = FALSE;
+ }
done:
- if (default_pager != MEMORY_OBJECT_DEFAULT_NULL) {
- /* release our handle on default pager */
- memory_object_default_deallocate(default_pager);
+ if (default_pager != MEMORY_OBJECT_DEFAULT_NULL) {
+ /* release our handle on default pager */
+ memory_object_default_deallocate(default_pager);
+ }
}
return error;
}
projects / apple / xnu.git / blobdiff