X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..fe8ab488e9161c46dd9885d58fc52996dc0249ff:/bsd/kern/kern_symfile.c?ds=sidebyside diff --git a/bsd/kern/kern_symfile.c b/bsd/kern/kern_symfile.c index d90edce20..0e9d6c9c6 100644 --- a/bsd/kern/kern_symfile.c +++ b/bsd/kern/kern_symfile.c @@ -1,43 +1,35 @@ /* - * Copyright (c) 2000 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@ */ /* Copyright (c) 1998 Apple Computer, Inc. All rights reserved. * * File: bsd/kern/kern_symfile.c * - * This file contains creates a dummy symbol file for mach_kernel based on - * the symbol table information passed by the SecondaryLoader/PlatformExpert. - * This allows us to correctly link other executables (drivers, etc) against the - * the kernel in cases where the kernel image on the root device does not match - * the live kernel. This can occur during net-booting where the actual kernel - * image is obtained from the network via tftp rather than the root - * device. - * - * If a symbol table is available, then the file /mach.sym will be created - * containing a Mach Header and a LC_SYMTAB load command followed by the - * the symbol table data for mach_kernel. - * * HISTORY - * - * . */ #include @@ -47,247 +39,521 @@ #include #include #include -#include -#include +#include +#include +#include #include #include -#include #include -#include +#include #include #include #include +#include +#include #include #include +#include #include +#include +#include -extern unsigned char rootdevice[]; -extern vm_size_t page_size; +/* 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 pinned; +}; -int kernel_symfile_opened = 0; -int error_code = 0; -extern int IODTGetLoaderInfo( char *key, void **infoAddr, int *infoSize ); -extern void IODTFreeLoaderInfo( char *key, void *infoAddr, int infoSize ); +static int file_ioctl(void * p1, void * p2, u_long theIoctl, caddr_t result) +{ + dev_t device = *(dev_t*) p1; -struct segment_command *findSegmentByName( struct mach_header *mh, const char *section_name ); + return ((*bdevsw[major(device)].d_ioctl) + (device, theIoctl, result, S_IFBLK, p2)); +} -/* - * - */ -int get_kernel_symfile( struct proc *p, char **symfile ) +static int device_ioctl(void * p1, __unused void * p2, u_long theIoctl, caddr_t result) { - if ( kernel_symfile_opened == 0 ) + 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; + 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) { - kernel_symfile_opened = 1; - error_code = output_kernel_symbols( p ); + p1 = &ref->device; + p2 = kernproc; + do_ioctl = &file_ioctl; } - if ( error_code == 0 ) *symfile = "\\mach.sym"; + else + { + /* Partition. */ + p1 = ref->vp; + p2 = ref->ctx; + do_ioctl = &device_ioctl; + } + 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; + } - return error_code; + 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 error = EINVAL; + + if (error) break; + offset += filechunk; + } + return (error); } -/* - * - */ -int output_kernel_symbols( register struct proc *p ) -{ - register struct vnode *vp; - register struct pcred *pcred = p->p_cred; - register struct ucred *cred = pcred->pc_ucred; - struct nameidata nd; - struct vattr vattr; - struct mach_header *orig_mh, *mh; - struct load_command *lc; - struct segment_command *orig_ds, *orig_ts, *sg; - struct section *se; - struct symtab_command *sc, *sc0; - struct nlist *nl; - vm_size_t orig_mhsize, sc0_size; - vm_offset_t header; - vm_size_t header_size; - int error, error1; - int i, j; - int symfoffset, symsize; - int rc_mh, rc_sc; - - error = EFAULT; - - vp = NULL; - header = NULL; - orig_mh = NULL; - sc0 = NULL; - - rc_mh = IODTGetLoaderInfo( "Kernel-__HEADER", (void **)&orig_mh, &orig_mhsize ); - rc_sc = IODTGetLoaderInfo( "Kernel-__SYMTAB", (void **)&sc0, &sc0_size ); - - if ( rc_mh != 0 || orig_mh == 0 || orig_mhsize < sizeof(struct mach_header) ) goto out; - if ( rc_sc != 0 || sc0 == 0 || sc0_size < sizeof(struct symtab_command) ) goto out; - if ( pcred->p_svuid != pcred->p_ruid || pcred->p_svgid != pcred->p_rgid ) goto out; +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 write_file_offset, + caddr_t write_file_addr, + vm_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 (*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; + } - if ( rootdevice[0] == 'e' && rootdevice[1] == 'n' ) goto out; + bzero(ref, sizeof(*ref)); + p = kernproc; + ref->ctx = vfs_context_create(vfs_context_current()); - NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "mach.sym", p); - if( (error = vn_open(&nd, O_CREAT | FWRITE, S_IRUSR | S_IRGRP | S_IROTH )) != 0 ) goto out; + if ((error = vnode_open(name, (create_file) ? (O_CREAT | FWRITE) : FWRITE, + (0), 0, &ref->vp, ref->ctx))) + goto out; - vp = nd.ni_vp; - - /* Don't dump to non-regular files or files with links. */ - error = EFAULT; - if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred, p) || vattr.va_nlink != 1) goto out; + if (ref->vp->v_type == VREG) + { + vnode_lock_spin(ref->vp); + SET(ref->vp->v_flag, VSWAP); + vnode_unlock(ref->vp); + } - VATTR_NULL(&vattr); - vattr.va_size = 0; - VOP_LEASE(vp, p, cred, LEASE_WRITE); - VOP_SETATTR(vp, &vattr, cred, p); - p->p_acflag |= ACORE; + 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; + } - orig_ts = findSegmentByName(orig_mh, "__TEXT"); - orig_ds = findSegmentByName(orig_mh, "__DATA"); + 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; + + kprintf("vp va_rdev major %d minor %d\n", major(va.va_rdev), minor(va.va_rdev)); + kprintf("vp va_fsid major %d minor %d\n", major(va.va_fsid), minor(va.va_fsid)); + kprintf("vp size %qd alloc %qd\n", va.va_data_size, va.va_data_alloc); + + 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) + { + 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; - if ( orig_ts == NULL || orig_ds == NULL ) goto out; + 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; - header_size = sizeof(struct mach_header) - + orig_ts->cmdsize - + orig_ds->cmdsize - + sizeof(struct symtab_command); + // get block size - (void) kmem_alloc_wired( kernel_map, - (vm_offset_t *)&header, - (vm_size_t)header_size); + error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize); + if (error) + goto out; - if ( header == NULL ) 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; + } - bzero( (void *)header, header_size ); + // pin logical extents - /* - * Set up Mach-O header. - */ - mh = (struct mach_header *) header; - mh->magic = orig_mh->magic; - mh->cputype = orig_mh->cputype; - mh->cpusubtype = orig_mh->cpusubtype; - mh->filetype = orig_mh->filetype; - mh->ncmds = 3; - mh->sizeofcmds = header_size - sizeof(struct mach_header); + error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength); + if (error && (ENOTTY != error)) goto out; + ref->pinned = (error == 0); - /* - * Copy __DATA and __TEXT segment commands from mach_kernel so loadable drivers - * get correct section alignment hints. - */ - sg = (struct segment_command *)(mh+1); - bcopy( orig_ts, sg, orig_ts->cmdsize ); + // generate the block list - sg = (struct segment_command *)((int)sg + sg->cmdsize); - bcopy( orig_ds, sg, orig_ds->cmdsize ); + error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL); + if (error) + goto out; + locked = TRUE; - sg = (struct segment_command *)(mh+1); - - for ( i = 0; i < 2; i++ ) + f_offset = 0; + while (f_offset < ref->filelength) + { + if (ref->vp->v_type == VREG) { - sg->vmaddr = 0; - sg->vmsize = 0x1000; - sg->fileoff = 0; - sg->filesize = 0; - sg->maxprot = 0; - sg->initprot = 0; - sg->flags = 0; - - se = (struct section *)(sg+1); - for ( j = 0; j < sg->nsects; j++, se++ ) - { - se->addr = 0; - se->size = 0; - se->offset = 0; - se->nreloc = 0; - } + filechunk = 1*1024*1024*1024; + daddr64_t blkno; - sg = (struct segment_command *)((int)sg + sg->cmdsize); - } - - symfoffset = round_page(header_size); - - /* - * Set up LC_SYMTAB command - */ - sc = (struct symtab_command *)sg; - sc->cmd = LC_SYMTAB; - sc->cmdsize = sizeof(struct symtab_command); - sc->symoff = symfoffset; - sc->nsyms = sc0->nsyms; - sc->strsize = sc0->strsize; - sc->stroff = symfoffset + sc->nsyms * sizeof(struct nlist); + error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno, + &filechunk, NULL, VNODE_WRITE, NULL); + if (error) + goto out; - symsize = sc->nsyms * sizeof(struct nlist) + sc->strsize; + 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; + } - nl = (struct nlist *)(sc0+1); - for (i = 0; i < sc->nsyms; i++, nl++ ) + physoffset = 0; + while (physoffset < filechunk) { - if ( (nl->n_type & N_TYPE) == N_SECT ) + 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) { - nl->n_sect = NO_SECT; - nl->n_type = (nl->n_type & ~N_TYPE) | N_ABS; + 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); - /* - * Write out the load commands at the beginning of the - * file. - */ - error = vn_rdwr(UIO_WRITE, vp, (caddr_t)mh, header_size, (off_t)0, - UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p); - if ( error != 0 ) goto out; - - /* - * Write out kernel symbols - */ - error = vn_rdwr(UIO_WRITE, vp, (caddr_t)(sc0+1), symsize, symfoffset, - UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p); - if ( error != 0 ) goto out; + if (ref->vp->v_type == VREG) + p1 = ⌖ + + // 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 |= kIOHibernateOptionSSD; + + if (partition_device_result) + *partition_device_result = device; + if (image_device_result) + *image_device_result = target; + if (oflags) + *oflags = flags; out: - if ( header != 0 ) kmem_free(kernel_map, header, header_size); - if ( orig_mh != 0 ) IODTFreeLoaderInfo( "Kernel-__HEADER", (void *)orig_mh, round_page(orig_mhsize) ); - if ( sc0 != 0 ) IODTFreeLoaderInfo( "Kernel-__SYMTAB", (void *)sc0, round_page(sc0_size) ); - - if ( vp != 0 ) - { - VOP_UNLOCK(vp, 0, p); - error1 = vn_close(vp, FWRITE, cred, p); - if (error == 0) error = error1; - } + kprintf("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->pinned) + { + _dk_cs_pin_t pin; + bzero(&pin, sizeof(pin)); + + pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST; + p1 = &device; + (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin); + } + if (ref->vp) + { + 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(error); + return(ref); } -/* - * - */ -struct segment_command *findSegmentByName( struct mach_header *mh, const char *section_name ) +int +kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_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))); +} + + +void +kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref, + off_t write_offset, caddr_t addr, vm_size_t write_length, + off_t discard_offset, off_t discard_end) { - struct segment_command *sg; - int i; - - sg = (struct segment_command *)(mh+1); + int error; + _dk_cs_pin_t pin; + kprintf("kern_close_file_for_direct_io\n"); - for ( i=0; i < mh->ncmds; i++ ) + if (!ref) return; + + if (ref->vp) { - if ( (sg->cmd == LC_SEGMENT) && (strcmp(sg->segname, section_name) == 0) ) + 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); + + if (ref->pinned) { - return sg; + bzero(&pin, sizeof(pin)); + pin.cp_flags = _DKIOCCSPINDISCARDBLACKLIST; + (void) do_ioctl(p1, p2, _DKIOCCSUNPINEXTENT, (caddr_t)&pin); } + - sg = (struct segment_command *)((int)sg + sg->cmdsize); - } + if (discard_offset && discard_end && !ref->pinned) + { + (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, discard_end); + } + if (addr && write_length) + { + (void) kern_write_file(ref, write_offset, addr, write_length, 0); + } - return NULL; -} - - - - + error = vnode_close(ref->vp, FWRITE, ref->ctx); + ref->vp = NULLVP; + kprintf("vnode_close(%d)\n", error); + } + vfs_context_rele(ref->ctx); + ref->ctx = NULL; + kfree(ref, sizeof(struct kern_direct_file_io_ref_t)); +}