[apple/xnu.git] / bsd / kern / kern_symfile.c

/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. 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
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * 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_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
 *
 *	File:	bsd/kern/kern_symfile.c
 *
 * HISTORY
 */

#include <mach/vm_param.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/namei.h>
#include <sys/vnode_internal.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/timeb.h>
#include <sys/times.h>
#include <sys/acct.h>
#include <sys/file_internal.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/stat.h>
#include <sys/disk.h>
#include <sys/conf.h>
#include <sys/content_protection.h>

#include <mach-o/loader.h>
#include <mach-o/nlist.h>

#include <kern/kalloc.h>
#include <vm/vm_kern.h>
#include <pexpert/pexpert.h>
#include <IOKit/IOPolledInterface.h>

/* This function is called from kern_sysctl in the current process context;
 * it is exported with the System6.0.exports, but this appears to be a legacy
 * export, as there are no internal consumers.
 */
int
get_kernel_symfile(__unused proc_t p, __unused char const **symfile);
int
get_kernel_symfile(__unused proc_t p, __unused char const **symfile)
{
    return KERN_FAILURE;
}

struct kern_direct_file_io_ref_t
{
    vfs_context_t  ctx;
    struct vnode * vp;
    dev_t          device;
    uint32_t	   blksize;
    off_t          filelength;
    char           cf;
    char           pinned;
};


static int file_ioctl(void * p1, void * p2, u_long theIoctl, caddr_t result)
{
    dev_t device = *(dev_t*) p1;

    return ((*bdevsw[major(device)].d_ioctl)
		    (device, theIoctl, result, S_IFBLK, p2));
}

static int device_ioctl(void * p1, __unused void * p2, u_long theIoctl, caddr_t result)
{
    return (VNOP_IOCTL(p1, theIoctl, result, 0, p2));
}

static int
kern_ioctl_file_extents(struct kern_direct_file_io_ref_t * ref, u_long theIoctl, off_t offset, off_t end)
{
    int error = 0;
    int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
    void * p1;
    void * p2;
    uint64_t    fileblk;
    size_t      filechunk;
    dk_extent_t  extent;
    dk_unmap_t   unmap;
    _dk_cs_pin_t pin;

    bzero(&extent, sizeof(dk_extent_t));
    bzero(&unmap, sizeof(dk_unmap_t));
    bzero(&pin, sizeof(pin));
    if (ref->vp->v_type == VREG)
    {
	 p1 = &ref->device;
	 p2 = kernproc;
	 do_ioctl = &file_ioctl;
    }
    else
    {
	/* Partition. */
	p1 = ref->vp;
	p2 = ref->ctx;
	do_ioctl = &device_ioctl;
    }

    if (_DKIOCCSPINEXTENT == theIoctl) {
	    /* Tell CS the image size, so it knows whether to place the subsequent pins SSD/HDD */
	    pin.cp_extent.length = end;
	    pin.cp_flags = _DKIOCCSHIBERNATEIMGSIZE;
	    (void) do_ioctl(p1, p2, _DKIOCCSPINEXTENT, (caddr_t)&pin);
    } else if (_DKIOCCSUNPINEXTENT == theIoctl) {
	    /* Tell CS hibernation is done, so it can stop blocking overlapping writes */
	    pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST;
	    (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin);
    }

    while (offset < end) 
    {
        if (ref->vp->v_type == VREG)
        {
            daddr64_t blkno;
	    filechunk = 1*1024*1024*1024;
	    if (filechunk > (size_t)(end - offset))
	    filechunk = (size_t)(end - offset);
            error = VNOP_BLOCKMAP(ref->vp, offset, filechunk, &blkno,
								  &filechunk, NULL, VNODE_WRITE, NULL);
			if (error) break;
            fileblk = blkno * ref->blksize;
        }
        else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
        {
            fileblk = offset;
            filechunk = ref->filelength;
        }

	if (DKIOCUNMAP == theIoctl)
	{
	    extent.offset = fileblk;
	    extent.length = filechunk;
	    unmap.extents = &extent;
	    unmap.extentsCount = 1;
	    error = do_ioctl(p1, p2, theIoctl, (caddr_t)&unmap);
// 	    printf("DKIOCUNMAP(%d) 0x%qx, 0x%qx\n", error, extent.offset, extent.length);
	}
	else if (_DKIOCCSPINEXTENT == theIoctl)
	{
	    pin.cp_extent.offset = fileblk;
	    pin.cp_extent.length = filechunk;
	    pin.cp_flags = _DKIOCCSPINFORHIBERNATION;
	    error = do_ioctl(p1, p2, theIoctl, (caddr_t)&pin);
	    if (error && (ENOTTY != error))
	    {
		printf("_DKIOCCSPINEXTENT(%d) 0x%qx, 0x%qx\n", error, pin.cp_extent.offset, pin.cp_extent.length);
	    }
	}
	else if (_DKIOCCSUNPINEXTENT == theIoctl)
	{
	    pin.cp_extent.offset = fileblk;
	    pin.cp_extent.length = filechunk;
	    pin.cp_flags = _DKIOCCSPINFORHIBERNATION;
	    error = do_ioctl(p1, p2, theIoctl, (caddr_t)&pin);
	    if (error && (ENOTTY != error))
	    {
		printf("_DKIOCCSUNPINEXTENT(%d) 0x%qx, 0x%qx\n", error, pin.cp_extent.offset, pin.cp_extent.length);
	    }
	}
	else error = EINVAL;

        if (error) break;
        offset += filechunk;
    }
    return (error);
}

extern uint32_t freespace_mb(vnode_t vp);

struct kern_direct_file_io_ref_t *
kern_open_file_for_direct_io(const char * name, 
			     boolean_t create_file,
			     kern_get_file_extents_callback_t callback, 
			     void * callback_ref,
                             off_t set_file_size,
                             off_t fs_free_size,
                             off_t write_file_offset,
                             void * write_file_addr,
                             size_t write_file_len,
			     dev_t * partition_device_result,
			     dev_t * image_device_result,
                             uint64_t * partitionbase_result,
                             uint64_t * maxiocount_result,
                             uint32_t * oflags)
{
    struct kern_direct_file_io_ref_t * ref;

    proc_t            p;
    struct vnode_attr va;
    int               error;
    off_t             f_offset;
    uint64_t          fileblk;
    size_t            filechunk;
    uint64_t          physoffset;
    dev_t             device;
    dev_t             target = 0;
    int               isssd = 0;
    uint32_t          flags = 0;
    uint32_t          blksize;
    off_t             maxiocount, count, segcount;
    boolean_t         locked = FALSE;
    int               fmode, cmode;
    struct            nameidata nd;
    u_int32_t         ndflags;
    off_t             mpFree;

    int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
    void * p1 = NULL;
    void * p2 = NULL;

    error = EFAULT;

    ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
    if (!ref)
    {
	error = EFAULT;
    	goto out;
    }

    bzero(ref, sizeof(*ref));
    p = kernproc;
    ref->ctx = vfs_context_create(vfs_context_kernel());

    fmode  = (create_file) ? (O_CREAT | FWRITE) : FWRITE;
    cmode =  S_IRUSR | S_IWUSR;
    ndflags = NOFOLLOW;
    NDINIT(&nd, LOOKUP, OP_OPEN, ndflags, UIO_SYSSPACE, CAST_USER_ADDR_T(name), ref->ctx);
    VATTR_INIT(&va);
    VATTR_SET(&va, va_mode, cmode);
    VATTR_SET(&va, va_dataprotect_flags, VA_DP_RAWENCRYPTED);
    VATTR_SET(&va, va_dataprotect_class, PROTECTION_CLASS_D);
    if ((error = vn_open_auth(&nd, &fmode, &va))) goto out;

    ref->vp = nd.ni_vp;
    if (ref->vp->v_type == VREG)
    {
        vnode_lock_spin(ref->vp);
        SET(ref->vp->v_flag, VSWAP);
        vnode_unlock(ref->vp);
    }

    if (write_file_addr && write_file_len)
    {
	if ((error = kern_write_file(ref, write_file_offset, write_file_addr, write_file_len, 0))) goto out;
    }

    VATTR_INIT(&va);
    VATTR_WANTED(&va, va_rdev);
    VATTR_WANTED(&va, va_fsid);
    VATTR_WANTED(&va, va_data_size);
    VATTR_WANTED(&va, va_data_alloc);
    VATTR_WANTED(&va, va_nlink);
    error = EFAULT;
    if (vnode_getattr(ref->vp, &va, ref->ctx)) goto out;

    mpFree = freespace_mb(ref->vp);
    mpFree <<= 20;
    kprintf("kern_direct_file(%s): vp size %qd, alloc %qd, mp free %qd, keep free %qd\n", 
    		name, va.va_data_size, va.va_data_alloc, mpFree, fs_free_size);

    if (ref->vp->v_type == VREG)
    {
        /* Don't dump files with links. */
        if (va.va_nlink != 1) goto out;

        device = va.va_fsid;
        ref->filelength = va.va_data_size;

        p1 = &device;
        p2 = p;
        do_ioctl = &file_ioctl;

        if (set_file_size)
        {
            if (fs_free_size)
            {
		mpFree += va.va_data_alloc;
		if ((mpFree < set_file_size) || ((mpFree - set_file_size) < fs_free_size))
		{
		    error = ENOSPC;
		    goto out;
		}
	    }
	    error = vnode_setsize(ref->vp, set_file_size, IO_NOZEROFILL | IO_NOAUTH, ref->ctx);
	    if (error) goto out;
	    ref->filelength = set_file_size;
        }
    }
    else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
    {
	/* Partition. */
        device = va.va_rdev;

        p1 = ref->vp;
        p2 = ref->ctx;
        do_ioctl = &device_ioctl;
    }
    else
    {
	/* Don't dump to non-regular files. */
        error = EFAULT;
        goto out;
    }
    ref->device = device;

    // probe for CF
    dk_corestorage_info_t cs_info;
    memset(&cs_info, 0, sizeof(dk_corestorage_info_t));
    error = do_ioctl(p1, p2, DKIOCCORESTORAGE, (caddr_t)&cs_info);
    ref->cf = (error == 0) && (cs_info.flags & DK_CORESTORAGE_ENABLE_HOTFILES);

    // get block size

    error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
    if (error)
        goto out;

    if (ref->vp->v_type != VREG)
    {
        error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
        if (error) goto out;
	ref->filelength = fileblk * ref->blksize;    
    }

    // pin logical extents

    error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
    if (error && (ENOTTY != error)) goto out;
    ref->pinned = (error == 0);

    // generate the block list

    error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
    if (error) goto out;
    locked = TRUE;

    f_offset = 0;
    while (f_offset < ref->filelength) 
    {
        if (ref->vp->v_type == VREG)
        {
            filechunk = 1*1024*1024*1024;
            daddr64_t blkno;

            error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno,
								  &filechunk, NULL, VNODE_WRITE, NULL);
            if (error) goto out;

            fileblk = blkno * ref->blksize;
        }
        else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
        {
            fileblk = f_offset;
            filechunk = f_offset ? 0 : ref->filelength;
        }

        physoffset = 0;
        while (physoffset < filechunk)
        {
            dk_physical_extent_t getphysreq;
            bzero(&getphysreq, sizeof(getphysreq));

            getphysreq.offset = fileblk + physoffset;
            getphysreq.length = (filechunk - physoffset);
            error = do_ioctl(p1, p2, DKIOCGETPHYSICALEXTENT, (caddr_t) &getphysreq);
            if (error) goto out;
            if (!target)
            {
                target = getphysreq.dev;
            }
            else if (target != getphysreq.dev)
            {
                error = ENOTSUP;
                goto out;
            }
#if HIBFRAGMENT
	    uint64_t rev;
	    for (rev = 4096; rev <= getphysreq.length; rev += 4096)
	    {
		callback(callback_ref, getphysreq.offset + getphysreq.length - rev, 4096);
	    }
#else
            callback(callback_ref, getphysreq.offset, getphysreq.length);
#endif
            physoffset += getphysreq.length;
        }
        f_offset += filechunk;
    }
    callback(callback_ref, 0ULL, 0ULL);

    if (ref->vp->v_type == VREG) p1 = &target;
    else
    {
	p1 = &target;
	p2 = p;
	do_ioctl = &file_ioctl;
    }

    // get partition base

    if (partitionbase_result) 
    {
        error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
        if (error)
            goto out;
    }

    // get block size & constraints

    error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
    if (error)
        goto out;

    maxiocount = 1*1024*1024*1024;

    error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count);
    if (error)
        count = 0;
    count *= blksize;
    if (count && (count < maxiocount))
        maxiocount = count;

    error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count);
    if (error)
        count = 0;
    count *= blksize;
    if (count && (count < maxiocount))
        maxiocount = count;

    error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count);
    if (error)
        count = 0;
    if (count && (count < maxiocount))
        maxiocount = count;

    error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count);
    if (error)
        count = 0;
    if (count && (count < maxiocount))
        maxiocount = count;

    error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
    if (!error)
	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTREAD, (caddr_t) &segcount);
    if (error)
        count = segcount = 0;
    count *= segcount;
    if (count && (count < maxiocount))
        maxiocount = count;

    error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
    if (!error)
	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTWRITE, (caddr_t) &segcount);
    if (error)
        count = segcount = 0;
    count *= segcount;
    if (count && (count < maxiocount))
        maxiocount = count;

    kprintf("max io 0x%qx bytes\n", maxiocount);
    if (maxiocount_result)
        *maxiocount_result = maxiocount;

    error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd);
    if (!error && isssd)
        flags |= kIOPolledFileSSD;

    if (partition_device_result)
        *partition_device_result = device;
    if (image_device_result)
        *image_device_result = target;
    if (oflags)
        *oflags = flags;

    if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
    {
        vnode_close(ref->vp, FWRITE, ref->ctx);
        ref->vp = NULLVP;
	vfs_context_rele(ref->ctx);
	ref->ctx = NULL;
    }

out:
    printf("kern_open_file_for_direct_io(%d)\n", error);

    if (error && locked)
    {
        p1 = &device;
        (void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
    }

    if (error && ref)
    {
	if (ref->vp)
	{
	    (void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (ref->pinned && ref->cf) ? ref->filelength : 0);
	    vnode_close(ref->vp, FWRITE, ref->ctx);
	    ref->vp = NULLVP;
	}
	vfs_context_rele(ref->ctx);
	kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
	ref = NULL;
    }

    return(ref);
}

int
kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, void * addr, size_t len, int ioflag)
{
    return (vn_rdwr(UIO_WRITE, ref->vp,
			addr, len, offset,
			UIO_SYSSPACE, ioflag|IO_SYNC|IO_NODELOCKED|IO_UNIT, 
                        vfs_context_ucred(ref->ctx), (int *) 0,
			vfs_context_proc(ref->ctx)));
}

int
kern_read_file(struct kern_direct_file_io_ref_t * ref, off_t offset, void * addr, size_t len, int ioflag)
{
    return (vn_rdwr(UIO_READ, ref->vp,
			addr, len, offset,
			UIO_SYSSPACE, ioflag|IO_SYNC|IO_NODELOCKED|IO_UNIT, 
                        vfs_context_ucred(ref->ctx), (int *) 0,
			vfs_context_proc(ref->ctx)));
}


struct mount *
kern_file_mount(struct kern_direct_file_io_ref_t * ref)
{
    return (ref->vp->v_mount);
}

void
kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref,
			      off_t write_offset, void * addr, size_t write_length,
			      off_t discard_offset, off_t discard_end)
{
    int error;
    kprintf("kern_close_file_for_direct_io\n");

    if (!ref) return;

    if (ref->vp)
    {
        int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
        void * p1;
        void * p2;

        if (ref->vp->v_type == VREG)
        {
            p1 = &ref->device;
            p2 = kernproc;
            do_ioctl = &file_ioctl;
        }
        else
        {
            /* Partition. */
            p1 = ref->vp;
            p2 = ref->ctx;
            do_ioctl = &device_ioctl;
        }
        (void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);

		//XXX If unmapping extents then don't also need to unpin; except ...
		//XXX if file unaligned (HFS 4k / Fusion 128k) then pin is superset and
		//XXX unmap is subset, so save extra walk over file extents (and the risk
		//XXX that CF drain starts) vs leaving partial units pinned to SSD
		//XXX (until whatever was sharing also unmaps).  Err on cleaning up fully.
		boolean_t will_unmap = (!ref->pinned || ref->cf) && (discard_end > discard_offset);
		boolean_t will_unpin = (ref->pinned && ref->cf /* && !will_unmap */);

		(void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (will_unpin) ? ref->filelength : 0);

        if (will_unmap)
        {
            (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, (ref->cf) ? ref->filelength : discard_end);
        }

        if (addr && write_length)
        {
            (void) kern_write_file(ref, write_offset, addr, write_length, 0);
        }

        error = vnode_close(ref->vp, FWRITE, ref->ctx);

        ref->vp = NULLVP;
        kprintf("vnode_close(%d)\n", error);
    }
    if (ref->ctx)
    {
	vfs_context_rele(ref->ctx);
	ref->ctx = NULL;
    }
    kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
}
Commit	Line	Data
1c79356b	1	/*
2d21ac55	2	* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
	29	*
	30	* File: bsd/kern/kern_symfile.c
	31	*
1c79356b	32	* HISTORY
1c79356b A	33	*/
	34
	35	#include <mach/vm_param.h>
	36
	37	#include <sys/param.h>
	38	#include <sys/systm.h>
	39	#include <sys/signalvar.h>
	40	#include <sys/resourcevar.h>
	41	#include <sys/namei.h>
91447636 A	42	#include <sys/vnode_internal.h>
	43	#include <sys/proc_internal.h>
	44	#include <sys/kauth.h>
1c79356b A	45	#include <sys/timeb.h>
1c79356b A	46	#include <sys/times.h>
1c79356b	47	#include <sys/acct.h>
91447636	48	#include <sys/file_internal.h>
1c79356b A	49	#include <sys/uio.h>
	50	#include <sys/kernel.h>
	51	#include <sys/stat.h>
91447636 A	52	#include <sys/disk.h>
91447636 A	53	#include <sys/conf.h>
3e170ce0	54	#include <sys/content_protection.h>
1c79356b A	55
	56	#include <mach-o/loader.h>
	57	#include <mach-o/nlist.h>
	58
91447636	59	#include <kern/kalloc.h>
1c79356b	60	#include <vm/vm_kern.h>
91447636	61	#include <pexpert/pexpert.h>
3e170ce0	62	#include <IOKit/IOPolledInterface.h>
1c79356b	63
2d21ac55 A	64	/* This function is called from kern_sysctl in the current process context;
	65	* it is exported with the System6.0.exports, but this appears to be a legacy
	66	* export, as there are no internal consumers.
1c79356b	67	*/
2d21ac55	68	int
7ddcb079 A	69	get_kernel_symfile(__unused proc_t p, __unused char const **symfile);
7ddcb079 A	70	int
2d21ac55	71	get_kernel_symfile(__unused proc_t p, __unused char const **symfile)
1c79356b	72	{
2d21ac55	73	return KERN_FAILURE;
0b4e3aa0	74	}
91447636	75
3a60a9f5 A	76	struct kern_direct_file_io_ref_t
3a60a9f5 A	77	{
6d2010ae A	78	vfs_context_t ctx;
	79	struct vnode * vp;
	80	dev_t device;
7ddcb079	81	uint32_t blksize;
316670eb	82	off_t filelength;
3e170ce0	83	char cf;
316670eb	84	char pinned;
3a60a9f5 A	85	};
	86
	87
6d2010ae	88	static int file_ioctl(void * p1, void * p2, u_long theIoctl, caddr_t result)
3a60a9f5	89	{
b0d623f7	90	dev_t device = (dev_t) p1;
3a60a9f5 A	91
	92	return ((*bdevsw[major(device)].d_ioctl)
	93	(device, theIoctl, result, S_IFBLK, p2));
	94	}
	95
6d2010ae	96	static int device_ioctl(void * p1, __unused void * p2, u_long theIoctl, caddr_t result)
3a60a9f5 A	97	{
	98	return (VNOP_IOCTL(p1, theIoctl, result, 0, p2));
	99	}
	100
316670eb A	101	static int
	102	kern_ioctl_file_extents(struct kern_direct_file_io_ref_t * ref, u_long theIoctl, off_t offset, off_t end)
	103	{
3e170ce0	104	int error = 0;
316670eb A	105	int (do_ioctl)(void p1, void * p2, u_long theIoctl, caddr_t result);
	106	void * p1;
	107	void * p2;
	108	uint64_t fileblk;
	109	size_t filechunk;
	110	dk_extent_t extent;
	111	dk_unmap_t unmap;
	112	_dk_cs_pin_t pin;
	113
	114	bzero(&extent, sizeof(dk_extent_t));
	115	bzero(&unmap, sizeof(dk_unmap_t));
	116	bzero(&pin, sizeof(pin));
	117	if (ref->vp->v_type == VREG)
	118	{
	119	p1 = &ref->device;
	120	p2 = kernproc;
	121	do_ioctl = &file_ioctl;
	122	}
	123	else
	124	{
	125	/* Partition. */
	126	p1 = ref->vp;
	127	p2 = ref->ctx;
	128	do_ioctl = &device_ioctl;
	129	}
3e170ce0 A	130
	131	if (_DKIOCCSPINEXTENT == theIoctl) {
	132	/* Tell CS the image size, so it knows whether to place the subsequent pins SSD/HDD */
	133	pin.cp_extent.length = end;
	134	pin.cp_flags = _DKIOCCSHIBERNATEIMGSIZE;
	135	(void) do_ioctl(p1, p2, _DKIOCCSPINEXTENT, (caddr_t)&pin);
	136	} else if (_DKIOCCSUNPINEXTENT == theIoctl) {
	137	/* Tell CS hibernation is done, so it can stop blocking overlapping writes */
	138	pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST;
	139	(void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin);
	140	}
	141
316670eb A	142	while (offset < end)
	143	{
	144	if (ref->vp->v_type == VREG)
	145	{
	146	daddr64_t blkno;
	147	filechunk = 110241024*1024;
	148	if (filechunk > (size_t)(end - offset))
	149	filechunk = (size_t)(end - offset);
fe8ab488 A	150	error = VNOP_BLOCKMAP(ref->vp, offset, filechunk, &blkno,
fe8ab488 A	151	&filechunk, NULL, VNODE_WRITE, NULL);
316670eb A	152	if (error) break;
	153	fileblk = blkno * ref->blksize;
	154	}
	155	else if ((ref->vp->v_type == VBLK) \|\| (ref->vp->v_type == VCHR))
	156	{
	157	fileblk = offset;
	158	filechunk = ref->filelength;
	159	}
	160
	161	if (DKIOCUNMAP == theIoctl)
	162	{
	163	extent.offset = fileblk;
	164	extent.length = filechunk;
	165	unmap.extents = &extent;
	166	unmap.extentsCount = 1;
	167	error = do_ioctl(p1, p2, theIoctl, (caddr_t)&unmap);
	168	// printf("DKIOCUNMAP(%d) 0x%qx, 0x%qx\n", error, extent.offset, extent.length);
	169	}
	170	else if (_DKIOCCSPINEXTENT == theIoctl)
	171	{
	172	pin.cp_extent.offset = fileblk;
	173	pin.cp_extent.length = filechunk;
fe8ab488	174	pin.cp_flags = _DKIOCCSPINFORHIBERNATION;
316670eb A	175	error = do_ioctl(p1, p2, theIoctl, (caddr_t)&pin);
	176	if (error && (ENOTTY != error))
	177	{
3e170ce0 A	178	printf("_DKIOCCSPINEXTENT(%d) 0x%qx, 0x%qx\n", error, pin.cp_extent.offset, pin.cp_extent.length);
	179	}
	180	}
	181	else if (_DKIOCCSUNPINEXTENT == theIoctl)
	182	{
	183	pin.cp_extent.offset = fileblk;
	184	pin.cp_extent.length = filechunk;
	185	pin.cp_flags = _DKIOCCSPINFORHIBERNATION;
	186	error = do_ioctl(p1, p2, theIoctl, (caddr_t)&pin);
	187	if (error && (ENOTTY != error))
	188	{
	189	printf("_DKIOCCSUNPINEXTENT(%d) 0x%qx, 0x%qx\n", error, pin.cp_extent.offset, pin.cp_extent.length);
316670eb A	190	}
	191	}
	192	else error = EINVAL;
	193
3e170ce0	194	if (error) break;
316670eb A	195	offset += filechunk;
	196	}
	197	return (error);
	198	}
	199
3e170ce0	200	extern uint32_t freespace_mb(vnode_t vp);
7ddcb079	201
3a60a9f5 A	202	struct kern_direct_file_io_ref_t *
3a60a9f5 A	203	kern_open_file_for_direct_io(const char * name,
3e170ce0	204	boolean_t create_file,
3a60a9f5 A	205	kern_get_file_extents_callback_t callback,
3a60a9f5 A	206	void * callback_ref,
db609669	207	off_t set_file_size,
3e170ce0	208	off_t fs_free_size,
db609669	209	off_t write_file_offset,
3e170ce0 A	210	void * write_file_addr,
3e170ce0 A	211	size_t write_file_len,
6d2010ae A	212	dev_t * partition_device_result,
6d2010ae A	213	dev_t * image_device_result,
3a60a9f5	214	uint64_t * partitionbase_result,
0b4c1975	215	uint64_t * maxiocount_result,
db609669	216	uint32_t * oflags)
3a60a9f5 A	217	{
	218	struct kern_direct_file_io_ref_t * ref;
	219
3e170ce0 A	220	proc_t p;
	221	struct vnode_attr va;
	222	int error;
	223	off_t f_offset;
	224	uint64_t fileblk;
	225	size_t filechunk;
	226	uint64_t physoffset;
	227	dev_t device;
	228	dev_t target = 0;
	229	int isssd = 0;
	230	uint32_t flags = 0;
	231	uint32_t blksize;
	232	off_t maxiocount, count, segcount;
	233	boolean_t locked = FALSE;
	234	int fmode, cmode;
	235	struct nameidata nd;
	236	u_int32_t ndflags;
	237	off_t mpFree;
3a60a9f5	238
6d2010ae A	239	int (do_ioctl)(void p1, void * p2, u_long theIoctl, caddr_t result);
	240	void * p1 = NULL;
	241	void * p2 = NULL;
3a60a9f5 A	242
	243	error = EFAULT;
	244
	245	ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
	246	if (!ref)
	247	{
	248	error = EFAULT;
	249	goto out;
	250	}
	251
316670eb	252	bzero(ref, sizeof(*ref));
6d2010ae	253	p = kernproc;
3e170ce0	254	ref->ctx = vfs_context_create(vfs_context_kernel());
3a60a9f5	255
3e170ce0 A	256	fmode = (create_file) ? (O_CREAT \| FWRITE) : FWRITE;
	257	cmode = S_IRUSR \| S_IWUSR;
	258	ndflags = NOFOLLOW;
	259	NDINIT(&nd, LOOKUP, OP_OPEN, ndflags, UIO_SYSSPACE, CAST_USER_ADDR_T(name), ref->ctx);
	260	VATTR_INIT(&va);
	261	VATTR_SET(&va, va_mode, cmode);
	262	VATTR_SET(&va, va_dataprotect_flags, VA_DP_RAWENCRYPTED);
	263	VATTR_SET(&va, va_dataprotect_class, PROTECTION_CLASS_D);
	264	if ((error = vn_open_auth(&nd, &fmode, &va))) goto out;
3a60a9f5	265
3e170ce0	266	ref->vp = nd.ni_vp;
39236c6e A	267	if (ref->vp->v_type == VREG)
	268	{
	269	vnode_lock_spin(ref->vp);
	270	SET(ref->vp->v_flag, VSWAP);
	271	vnode_unlock(ref->vp);
	272	}
	273
db609669	274	if (write_file_addr && write_file_len)
6d2010ae	275	{
3e170ce0	276	if ((error = kern_write_file(ref, write_file_offset, write_file_addr, write_file_len, 0))) goto out;
6d2010ae A	277	}
6d2010ae A	278
3a60a9f5 A	279	VATTR_INIT(&va);
	280	VATTR_WANTED(&va, va_rdev);
	281	VATTR_WANTED(&va, va_fsid);
	282	VATTR_WANTED(&va, va_data_size);
39236c6e	283	VATTR_WANTED(&va, va_data_alloc);
3a60a9f5 A	284	VATTR_WANTED(&va, va_nlink);
3a60a9f5 A	285	error = EFAULT;
3e170ce0	286	if (vnode_getattr(ref->vp, &va, ref->ctx)) goto out;
3a60a9f5	287
3e170ce0 A	288	mpFree = freespace_mb(ref->vp);
	289	mpFree <<= 20;
	290	kprintf("kern_direct_file(%s): vp size %qd, alloc %qd, mp free %qd, keep free %qd\n",
	291	name, va.va_data_size, va.va_data_alloc, mpFree, fs_free_size);
3a60a9f5 A	292
	293	if (ref->vp->v_type == VREG)
	294	{
3e170ce0 A	295	/* Don't dump files with links. */
3e170ce0 A	296	if (va.va_nlink != 1) goto out;
3a60a9f5 A	297
3a60a9f5 A	298	device = va.va_fsid;
db609669 A	299	ref->filelength = va.va_data_size;
db609669 A	300
b0d623f7	301	p1 = &device;
3a60a9f5 A	302	p2 = p;
3a60a9f5 A	303	do_ioctl = &file_ioctl;
db609669	304
3e170ce0 A	305	if (set_file_size)
	306	{
	307	if (fs_free_size)
	308	{
	309	mpFree += va.va_data_alloc;
	310	if ((mpFree < set_file_size) \|\| ((mpFree - set_file_size) < fs_free_size))
	311	{
	312	error = ENOSPC;
	313	goto out;
fe8ab488	314	}
3e170ce0 A	315	}
	316	error = vnode_setsize(ref->vp, set_file_size, IO_NOZEROFILL \| IO_NOAUTH, ref->ctx);
	317	if (error) goto out;
	318	ref->filelength = set_file_size;
	319	}
3a60a9f5 A	320	}
	321	else if ((ref->vp->v_type == VBLK) \|\| (ref->vp->v_type == VCHR))
	322	{
	323	/* Partition. */
	324	device = va.va_rdev;
	325
	326	p1 = ref->vp;
2d21ac55	327	p2 = ref->ctx;
3a60a9f5 A	328	do_ioctl = &device_ioctl;
	329	}
	330	else
	331	{
	332	/* Don't dump to non-regular files. */
3e170ce0	333	error = EFAULT;
3a60a9f5 A	334	goto out;
3a60a9f5 A	335	}
6d2010ae A	336	ref->device = device;
6d2010ae A	337
3e170ce0 A	338	// probe for CF
	339	dk_corestorage_info_t cs_info;
	340	memset(&cs_info, 0, sizeof(dk_corestorage_info_t));
	341	error = do_ioctl(p1, p2, DKIOCCORESTORAGE, (caddr_t)&cs_info);
	342	ref->cf = (error == 0) && (cs_info.flags & DK_CORESTORAGE_ENABLE_HOTFILES);
	343
6d2010ae A	344	// get block size
6d2010ae A	345
7ddcb079	346	error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
6d2010ae A	347	if (error)
	348	goto out;
	349
db609669	350	if (ref->vp->v_type != VREG)
6d2010ae A	351	{
6d2010ae A	352	error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
3e170ce0	353	if (error) goto out;
7ddcb079	354	ref->filelength = fileblk * ref->blksize;
6d2010ae A	355	}
6d2010ae A	356
316670eb A	357	// pin logical extents
	358
	359	error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
	360	if (error && (ENOTTY != error)) goto out;
	361	ref->pinned = (error == 0);
	362
	363	// generate the block list
	364
	365	error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
3e170ce0	366	if (error) goto out;
316670eb A	367	locked = TRUE;
316670eb A	368
6d2010ae	369	f_offset = 0;
7ddcb079	370	while (f_offset < ref->filelength)
6d2010ae A	371	{
	372	if (ref->vp->v_type == VREG)
	373	{
	374	filechunk = 110241024*1024;
	375	daddr64_t blkno;
	376
fe8ab488 A	377	error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno,
fe8ab488 A	378	&filechunk, NULL, VNODE_WRITE, NULL);
3e170ce0	379	if (error) goto out;
6d2010ae	380
7ddcb079	381	fileblk = blkno * ref->blksize;
6d2010ae A	382	}
	383	else if ((ref->vp->v_type == VBLK) \|\| (ref->vp->v_type == VCHR))
	384	{
	385	fileblk = f_offset;
7ddcb079	386	filechunk = f_offset ? 0 : ref->filelength;
6d2010ae A	387	}
	388
	389	physoffset = 0;
	390	while (physoffset < filechunk)
	391	{
	392	dk_physical_extent_t getphysreq;
	393	bzero(&getphysreq, sizeof(getphysreq));
	394
	395	getphysreq.offset = fileblk + physoffset;
	396	getphysreq.length = (filechunk - physoffset);
	397	error = do_ioctl(p1, p2, DKIOCGETPHYSICALEXTENT, (caddr_t) &getphysreq);
3e170ce0	398	if (error) goto out;
6d2010ae A	399	if (!target)
	400	{
	401	target = getphysreq.dev;
	402	}
	403	else if (target != getphysreq.dev)
	404	{
	405	error = ENOTSUP;
	406	goto out;
	407	}
39236c6e A	408	#if HIBFRAGMENT
	409	uint64_t rev;
	410	for (rev = 4096; rev <= getphysreq.length; rev += 4096)
	411	{
	412	callback(callback_ref, getphysreq.offset + getphysreq.length - rev, 4096);
	413	}
	414	#else
6d2010ae	415	callback(callback_ref, getphysreq.offset, getphysreq.length);
39236c6e	416	#endif
6d2010ae A	417	physoffset += getphysreq.length;
	418	}
	419	f_offset += filechunk;
	420	}
	421	callback(callback_ref, 0ULL, 0ULL);
	422
3e170ce0 A	423	if (ref->vp->v_type == VREG) p1 = &target;
	424	else
	425	{
	426	p1 = &target;
	427	p2 = p;
	428	do_ioctl = &file_ioctl;
	429	}
3a60a9f5 A	430
	431	// get partition base
	432
fe8ab488 A	433	if (partitionbase_result)
	434	{
	435	error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
	436	if (error)
	437	goto out;
	438	}
3a60a9f5 A	439
	440	// get block size & constraints
	441
	442	error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
	443	if (error)
	444	goto out;
	445
	446	maxiocount = 110241024*1024;
	447
	448	error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count);
	449	if (error)
	450	count = 0;
	451	count *= blksize;
	452	if (count && (count < maxiocount))
	453	maxiocount = count;
	454
	455	error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count);
	456	if (error)
	457	count = 0;
	458	count *= blksize;
	459	if (count && (count < maxiocount))
	460	maxiocount = count;
	461
	462	error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count);
	463	if (error)
	464	count = 0;
	465	if (count && (count < maxiocount))
	466	maxiocount = count;
	467
	468	error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count);
	469	if (error)
	470	count = 0;
	471	if (count && (count < maxiocount))
	472	maxiocount = count;
	473
	474	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
bd504ef0 A	475	if (!error)
bd504ef0 A	476	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTREAD, (caddr_t) &segcount);
3a60a9f5	477	if (error)
bd504ef0 A	478	count = segcount = 0;
bd504ef0 A	479	count *= segcount;
3a60a9f5 A	480	if (count && (count < maxiocount))
	481	maxiocount = count;
	482
	483	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
bd504ef0 A	484	if (!error)
bd504ef0 A	485	error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTWRITE, (caddr_t) &segcount);
3a60a9f5	486	if (error)
bd504ef0 A	487	count = segcount = 0;
bd504ef0 A	488	count *= segcount;
3a60a9f5 A	489	if (count && (count < maxiocount))
	490	maxiocount = count;
	491
	492	kprintf("max io 0x%qx bytes\n", maxiocount);
	493	if (maxiocount_result)
	494	*maxiocount_result = maxiocount;
	495
6d2010ae A	496	error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd);
6d2010ae A	497	if (!error && isssd)
3e170ce0	498	flags \|= kIOPolledFileSSD;
3a60a9f5	499
6d2010ae A	500	if (partition_device_result)
	501	*partition_device_result = device;
	502	if (image_device_result)
	503	*image_device_result = target;
fe8ab488	504	if (oflags)
6d2010ae	505	*oflags = flags;
3a60a9f5	506
3e170ce0 A	507	if ((ref->vp->v_type == VBLK) \|\| (ref->vp->v_type == VCHR))
	508	{
	509	vnode_close(ref->vp, FWRITE, ref->ctx);
	510	ref->vp = NULLVP;
	511	vfs_context_rele(ref->ctx);
	512	ref->ctx = NULL;
	513	}
	514
3a60a9f5	515	out:
3e170ce0	516	printf("kern_open_file_for_direct_io(%d)\n", error);
3a60a9f5	517
6d2010ae A	518	if (error && locked)
	519	{
	520	p1 = &device;
	521	(void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
	522	}
	523
	524	if (error && ref)
	525	{
	526	if (ref->vp)
	527	{
3e170ce0	528	(void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (ref->pinned && ref->cf) ? ref->filelength : 0);
2d21ac55 A	529	vnode_close(ref->vp, FWRITE, ref->ctx);
	530	ref->vp = NULLVP;
	531	}
2d21ac55 A	532	vfs_context_rele(ref->ctx);
	533	kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
	534	ref = NULL;
3a60a9f5	535	}
db609669	536
3a60a9f5 A	537	return(ref);
	538	}
	539
	540	int
3e170ce0	541	kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, void * addr, size_t len, int ioflag)
3a60a9f5 A	542	{
	543	return (vn_rdwr(UIO_WRITE, ref->vp,
	544	addr, len, offset,
fe8ab488	545	UIO_SYSSPACE, ioflag\|IO_SYNC\|IO_NODELOCKED\|IO_UNIT,
2d21ac55 A	546	vfs_context_ucred(ref->ctx), (int *) 0,
2d21ac55 A	547	vfs_context_proc(ref->ctx)));
3a60a9f5 A	548	}
3a60a9f5 A	549
3e170ce0 A	550	int
	551	kern_read_file(struct kern_direct_file_io_ref_t * ref, off_t offset, void * addr, size_t len, int ioflag)
	552	{
	553	return (vn_rdwr(UIO_READ, ref->vp,
	554	addr, len, offset,
	555	UIO_SYSSPACE, ioflag\|IO_SYNC\|IO_NODELOCKED\|IO_UNIT,
	556	vfs_context_ucred(ref->ctx), (int *) 0,
	557	vfs_context_proc(ref->ctx)));
	558	}
	559
	560
	561	struct mount *
	562	kern_file_mount(struct kern_direct_file_io_ref_t * ref)
	563	{
	564	return (ref->vp->v_mount);
	565	}
7ddcb079	566
3a60a9f5	567	void
6d2010ae	568	kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref,
3e170ce0	569	off_t write_offset, void * addr, size_t write_length,
7ddcb079	570	off_t discard_offset, off_t discard_end)
3a60a9f5	571	{
6d2010ae	572	int error;
3a60a9f5 A	573	kprintf("kern_close_file_for_direct_io\n");
3a60a9f5 A	574
6d2010ae	575	if (!ref) return;
3a60a9f5	576
6d2010ae A	577	if (ref->vp)
	578	{
	579	int (do_ioctl)(void p1, void * p2, u_long theIoctl, caddr_t result);
	580	void * p1;
	581	void * p2;
	582
	583	if (ref->vp->v_type == VREG)
	584	{
	585	p1 = &ref->device;
	586	p2 = kernproc;
	587	do_ioctl = &file_ioctl;
	588	}
	589	else
	590	{
	591	/* Partition. */
	592	p1 = ref->vp;
	593	p2 = ref->ctx;
	594	do_ioctl = &device_ioctl;
	595	}
	596	(void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
fe8ab488	597
3e170ce0 A	598	//XXX If unmapping extents then don't also need to unpin; except ...
	599	//XXX if file unaligned (HFS 4k / Fusion 128k) then pin is superset and
	600	//XXX unmap is subset, so save extra walk over file extents (and the risk
	601	//XXX that CF drain starts) vs leaving partial units pinned to SSD
	602	//XXX (until whatever was sharing also unmaps). Err on cleaning up fully.
	603	boolean_t will_unmap = (!ref->pinned \|\| ref->cf) && (discard_end > discard_offset);
	604	boolean_t will_unpin = (ref->pinned && ref->cf /* && !will_unmap */);
fe8ab488	605
3e170ce0 A	606	(void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (will_unpin) ? ref->filelength : 0);
	607
	608	if (will_unmap)
6d2010ae	609	{
3e170ce0	610	(void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, (ref->cf) ? ref->filelength : discard_end);
6d2010ae	611	}
3e170ce0	612
39236c6e A	613	if (addr && write_length)
39236c6e A	614	{
fe8ab488	615	(void) kern_write_file(ref, write_offset, addr, write_length, 0);
39236c6e	616	}
6d2010ae A	617
	618	error = vnode_close(ref->vp, FWRITE, ref->ctx);
	619
	620	ref->vp = NULLVP;
	621	kprintf("vnode_close(%d)\n", error);
3a60a9f5	622	}
3e170ce0 A	623	if (ref->ctx)
	624	{
	625	vfs_context_rele(ref->ctx);
	626	ref->ctx = NULL;
	627	}
6d2010ae	628	kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
3a60a9f5	629	}