/* * getf(int fd) - hold a lock on a file descriptor, to be released by calling * releasef(). On OSX we will also look up the vnode of the fd for calls * to spl_vn_rdwr(). */ void *getf(int fd) { struct fileproc *fp = NULL; struct spl_fileproc *sfp = NULL; struct vnode *vp; uint32_t vid; /* * We keep the "fp" pointer as well, both for unlocking in releasef() and * used in vn_rdwr(). */ sfp = kmem_alloc(sizeof(*sfp), KM_SLEEP); if (!sfp) return NULL; if (fp_lookup(current_proc(), fd, &fp, 0/*!locked*/)) { kmem_free(sfp, sizeof(*sfp)); return (NULL); } /* * The f_vnode ptr is used to point back to the "sfp" node itself, as it is * the only information passed to vn_rdwr. */ sfp->f_vnode = sfp; sfp->f_fd = fd; sfp->f_offset = 0; sfp->f_proc = current_proc(); sfp->f_fp = fp; /* Also grab vnode, so we can fish out the minor, for onexit */ if (!file_vnode_withvid(fd, &vp, &vid)) { if (vnode_vtype(vp) != VDIR) { sfp->f_file = minor(vnode_specrdev(vp)); } file_drop(fd); } mutex_enter(&spl_getf_lock); list_insert_tail(&spl_getf_list, sfp); mutex_exit(&spl_getf_lock); //printf("SPL: new getf(%d) ret %p fp is %p so vnode set to %p\n", // fd, sfp, fp, sfp->f_vnode); return sfp; }
/* * getf(int fd) - hold a lock on a file descriptor, to be released by calling * releasef(). On OSX we will also look up the vnode of the fd for calls * to spl_vn_rdwr(). */ void *getf(int fd) { struct fileproc *fp = NULL; struct spl_fileproc *sfp = NULL; /* * We keep the "fp" pointer as well, both for unlocking in releasef() and * used in vn_rdwr(). */ sfp = kmem_alloc(sizeof(*sfp), KM_SLEEP); if (!sfp) return NULL; if (fp_lookup(current_proc(), fd, &fp, 0/*!locked*/)) { kmem_free(sfp, sizeof(*sfp)); return (NULL); } /* * The f_vnode ptr is used to point back to the "sfp" node itself, as it is * the only information passed to vn_rdwr. */ sfp->f_vnode = sfp; sfp->f_fd = fd; sfp->f_offset = 0; sfp->f_proc = current_proc(); sfp->f_fp = fp; mutex_enter(&spl_getf_lock); list_insert_tail(&spl_getf_list, sfp); mutex_exit(&spl_getf_lock); //printf("SPL: new getf(%d) ret %p fp is %p so vnode set to %p\n", // fd, sfp, fp, sfp->f_vnode); return sfp; }
/* * XXX Internally, we use VM_PROT_* somewhat interchangeably, but the correct * XXX usage is PROT_* from an interface perspective. Thus the values of * XXX VM_PROT_* and PROT_* need to correspond. */ int mmap(proc_t p, struct mmap_args *uap, user_addr_t *retval) { /* * Map in special device (must be SHARED) or file */ struct fileproc *fp; register struct vnode *vp; int flags; int prot, file_prot; int err=0; vm_map_t user_map; kern_return_t result; mach_vm_offset_t user_addr; mach_vm_size_t user_size; vm_object_offset_t pageoff; vm_object_offset_t file_pos; int alloc_flags=0; boolean_t docow; vm_prot_t maxprot; void *handle; vm_pager_t pager; int mapanon=0; int fpref=0; int error =0; int fd = uap->fd; user_addr = (mach_vm_offset_t)uap->addr; user_size = (mach_vm_size_t) uap->len; AUDIT_ARG(addr, user_addr); AUDIT_ARG(len, user_size); AUDIT_ARG(fd, uap->fd); prot = (uap->prot & VM_PROT_ALL); #if 3777787 /* * Since the hardware currently does not support writing without * read-before-write, or execution-without-read, if the request is * for write or execute access, we must imply read access as well; * otherwise programs expecting this to work will fail to operate. */ if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE)) prot |= VM_PROT_READ; #endif /* radar 3777787 */ flags = uap->flags; vp = NULLVP; /* * The vm code does not have prototypes & compiler doesn't do the' * the right thing when you cast 64bit value and pass it in function * call. So here it is. */ file_pos = (vm_object_offset_t)uap->pos; /* make sure mapping fits into numeric range etc */ if (file_pos + user_size > (vm_object_offset_t)-PAGE_SIZE_64) return (EINVAL); /* * Align the file position to a page boundary, * and save its page offset component. */ pageoff = (file_pos & PAGE_MASK); file_pos -= (vm_object_offset_t)pageoff; /* Adjust size for rounding (on both ends). */ user_size += pageoff; /* low end... */ user_size = mach_vm_round_page(user_size); /* hi end */ /* * Check for illegal addresses. Watch out for address wrap... Note * that VM_*_ADDRESS are not constants due to casts (argh). */ if (flags & MAP_FIXED) { /* * The specified address must have the same remainder * as the file offset taken modulo PAGE_SIZE, so it * should be aligned after adjustment by pageoff. */ user_addr -= pageoff; if (user_addr & PAGE_MASK) return (EINVAL); } #ifdef notyet /* DO not have apis to get this info, need to wait till then*/ /* * XXX for non-fixed mappings where no hint is provided or * the hint would fall in the potential heap space, * place it after the end of the largest possible heap. * * There should really be a pmap call to determine a reasonable * location. */ else if (addr < mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ)) addr = mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ); #endif alloc_flags = 0; if (flags & MAP_ANON) { /* * Mapping blank space is trivial. Use positive fds as the alias * value for memory tracking. */ if (fd != -1) { /* * Use "fd" to pass (some) Mach VM allocation flags, * (see the VM_FLAGS_* definitions). */ alloc_flags = fd & (VM_FLAGS_ALIAS_MASK | VM_FLAGS_PURGABLE); if (alloc_flags != fd) { /* reject if there are any extra flags */ return EINVAL; } } handle = NULL; maxprot = VM_PROT_ALL; file_pos = 0; mapanon = 1; } else { struct vnode_attr va; vfs_context_t ctx = vfs_context_current(); /* * Mapping file, get fp for validation. Obtain vnode and make * sure it is of appropriate type. */ err = fp_lookup(p, fd, &fp, 0); if (err) return(err); fpref = 1; if(fp->f_fglob->fg_type == DTYPE_PSXSHM) { uap->addr = (user_addr_t)user_addr; uap->len = (user_size_t)user_size; uap->prot = prot; uap->flags = flags; uap->pos = file_pos; error = pshm_mmap(p, uap, retval, fp, (off_t)pageoff); goto bad; } if (fp->f_fglob->fg_type != DTYPE_VNODE) { error = EINVAL; goto bad; } vp = (struct vnode *)fp->f_fglob->fg_data; error = vnode_getwithref(vp); if(error != 0) goto bad; if (vp->v_type != VREG && vp->v_type != VCHR) { (void)vnode_put(vp); error = EINVAL; goto bad; } AUDIT_ARG(vnpath, vp, ARG_VNODE1); /* * POSIX: mmap needs to update access time for mapped files */ if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) { VATTR_INIT(&va); nanotime(&va.va_access_time); VATTR_SET_ACTIVE(&va, va_access_time); vnode_setattr(vp, &va, ctx); } /* * XXX hack to handle use of /dev/zero to map anon memory (ala * SunOS). */ if (vp->v_type == VCHR || vp->v_type == VSTR) { (void)vnode_put(vp); error = ENODEV; goto bad; } else { /* * Ensure that file and memory protections are * compatible. Note that we only worry about * writability if mapping is shared; in this case, * current and max prot are dictated by the open file. * XXX use the vnode instead? Problem is: what * credentials do we use for determination? What if * proc does a setuid? */ maxprot = VM_PROT_EXECUTE; /* ??? */ if (fp->f_fglob->fg_flag & FREAD) maxprot |= VM_PROT_READ; else if (prot & PROT_READ) { (void)vnode_put(vp); error = EACCES; goto bad; } /* * If we are sharing potential changes (either via * MAP_SHARED or via the implicit sharing of character * device mappings), and we are trying to get write * permission although we opened it without asking * for it, bail out. */ if ((flags & MAP_SHARED) != 0) { if ((fp->f_fglob->fg_flag & FWRITE) != 0) { /* * check for write access * * Note that we already made this check when granting FWRITE * against the file, so it seems redundant here. */ error = vnode_authorize(vp, NULL, KAUTH_VNODE_CHECKIMMUTABLE, ctx); /* if not granted for any reason, but we wanted it, bad */ if ((prot & PROT_WRITE) && (error != 0)) { vnode_put(vp); goto bad; } /* if writable, remember */ if (error == 0) maxprot |= VM_PROT_WRITE; } else if ((prot & PROT_WRITE) != 0) { (void)vnode_put(vp); error = EACCES; goto bad; } } else maxprot |= VM_PROT_WRITE; handle = (void *)vp; #if CONFIG_MACF error = mac_file_check_mmap(vfs_context_ucred(ctx), fp->f_fglob, prot, flags, &maxprot); if (error) { (void)vnode_put(vp); goto bad; } #endif /* MAC */ } } if (user_size == 0) { if (!mapanon) (void)vnode_put(vp); error = 0; goto bad; } /* * We bend a little - round the start and end addresses * to the nearest page boundary. */ user_size = mach_vm_round_page(user_size); if (file_pos & PAGE_MASK_64) { if (!mapanon) (void)vnode_put(vp); error = EINVAL; goto bad; } user_map = current_map(); if ((flags & MAP_FIXED) == 0) { alloc_flags |= VM_FLAGS_ANYWHERE; user_addr = mach_vm_round_page(user_addr); } else { if (user_addr != mach_vm_trunc_page(user_addr)) { if (!mapanon) (void)vnode_put(vp); error = EINVAL; goto bad; } /* * mmap(MAP_FIXED) will replace any existing mappings in the * specified range, if the new mapping is successful. * If we just deallocate the specified address range here, * another thread might jump in and allocate memory in that * range before we get a chance to establish the new mapping, * and we won't have a chance to restore the old mappings. * So we use VM_FLAGS_OVERWRITE to let Mach VM know that it * has to deallocate the existing mappings and establish the * new ones atomically. */ alloc_flags |= VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE; } if (flags & MAP_NOCACHE) alloc_flags |= VM_FLAGS_NO_CACHE; /* * Lookup/allocate object. */ if (handle == NULL) { pager = NULL; #ifdef notyet /* Hmm .. */ #if defined(VM_PROT_READ_IS_EXEC) if (prot & VM_PROT_READ) prot |= VM_PROT_EXECUTE; if (maxprot & VM_PROT_READ) maxprot |= VM_PROT_EXECUTE; #endif #endif #if 3777787 if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE)) prot |= VM_PROT_READ; if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE)) maxprot |= VM_PROT_READ; #endif /* radar 3777787 */ result = vm_map_enter_mem_object(user_map, &user_addr, user_size, 0, alloc_flags, IPC_PORT_NULL, 0, FALSE, prot, maxprot, (flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_DEFAULT); if (result != KERN_SUCCESS) goto out; } else { pager = (vm_pager_t)ubc_getpager(vp); if (pager == NULL) { (void)vnode_put(vp); error = ENOMEM; goto bad; } /* * Set credentials: * FIXME: if we're writing the file we need a way to * ensure that someone doesn't replace our R/W creds * with ones that only work for read. */ ubc_setthreadcred(vp, p, current_thread()); docow = FALSE; if ((flags & (MAP_ANON|MAP_SHARED)) == 0) { docow = TRUE; } #ifdef notyet /* Hmm .. */ #if defined(VM_PROT_READ_IS_EXEC) if (prot & VM_PROT_READ) prot |= VM_PROT_EXECUTE; if (maxprot & VM_PROT_READ) maxprot |= VM_PROT_EXECUTE; #endif #endif /* notyet */ #if 3777787 if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE)) prot |= VM_PROT_READ; if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE)) maxprot |= VM_PROT_READ; #endif /* radar 3777787 */ result = vm_map_enter_mem_object(user_map, &user_addr, user_size, 0, alloc_flags, (ipc_port_t)pager, file_pos, docow, prot, maxprot, (flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_DEFAULT); if (result != KERN_SUCCESS) { (void)vnode_put(vp); goto out; } file_prot = prot & (PROT_READ | PROT_WRITE | PROT_EXEC); if (docow) { /* private mapping: won't write to the file */ file_prot &= ~PROT_WRITE; } (void) ubc_map(vp, file_prot); } if (!mapanon) (void)vnode_put(vp); out: switch (result) { case KERN_SUCCESS: *retval = user_addr + pageoff; error = 0; break; case KERN_INVALID_ADDRESS: case KERN_NO_SPACE: error = ENOMEM; break; case KERN_PROTECTION_FAILURE: error = EACCES; break; default: error = EINVAL; break; } bad: if (fpref) fp_drop(p, fd, fp, 0); KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_mmap) | DBG_FUNC_NONE), fd, (uint32_t)(*retval), (uint32_t)user_size, error, 0); KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO2, SYS_mmap) | DBG_FUNC_NONE), (uint32_t)(*retval >> 32), (uint32_t)(user_size >> 32), (uint32_t)(file_pos >> 32), (uint32_t)file_pos, 0); return(error); }
kern_return_t map_fd_funneled( int fd, vm_object_offset_t offset, vm_offset_t *va, boolean_t findspace, vm_size_t size) { kern_return_t result; struct fileproc *fp; struct vnode *vp; void * pager; vm_offset_t map_addr=0; vm_size_t map_size; int err=0; vm_map_t my_map; proc_t p = current_proc(); struct vnode_attr vattr; /* * Find the inode; verify that it's a regular file. */ err = fp_lookup(p, fd, &fp, 0); if (err) return(err); if (fp->f_fglob->fg_type != DTYPE_VNODE){ err = KERN_INVALID_ARGUMENT; goto bad; } if (!(fp->f_fglob->fg_flag & FREAD)) { err = KERN_PROTECTION_FAILURE; goto bad; } vp = (struct vnode *)fp->f_fglob->fg_data; err = vnode_getwithref(vp); if(err != 0) goto bad; if (vp->v_type != VREG) { (void)vnode_put(vp); err = KERN_INVALID_ARGUMENT; goto bad; } AUDIT_ARG(vnpath, vp, ARG_VNODE1); /* * POSIX: mmap needs to update access time for mapped files */ if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) { VATTR_INIT(&vattr); nanotime(&vattr.va_access_time); VATTR_SET_ACTIVE(&vattr, va_access_time); vnode_setattr(vp, &vattr, vfs_context_current()); } if (offset & PAGE_MASK_64) { printf("map_fd: file offset not page aligned(%d : %s)\n",p->p_pid, p->p_comm); (void)vnode_put(vp); err = KERN_INVALID_ARGUMENT; goto bad; } map_size = round_page(size); /* * Allow user to map in a zero length file. */ if (size == 0) { (void)vnode_put(vp); err = KERN_SUCCESS; goto bad; } /* * Map in the file. */ pager = (void *)ubc_getpager(vp); if (pager == NULL) { (void)vnode_put(vp); err = KERN_FAILURE; goto bad; } my_map = current_map(); result = vm_map_64( my_map, &map_addr, map_size, (vm_offset_t)0, VM_FLAGS_ANYWHERE, pager, offset, TRUE, VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT); if (result != KERN_SUCCESS) { (void)vnode_put(vp); err = result; goto bad; } if (!findspace) { vm_offset_t dst_addr; vm_map_copy_t tmp; if (copyin(CAST_USER_ADDR_T(va), &dst_addr, sizeof (dst_addr)) || trunc_page_32(dst_addr) != dst_addr) { (void) vm_map_remove( my_map, map_addr, map_addr + map_size, VM_MAP_NO_FLAGS); (void)vnode_put(vp); err = KERN_INVALID_ADDRESS; goto bad; } result = vm_map_copyin(my_map, (vm_map_address_t)map_addr, (vm_map_size_t)map_size, TRUE, &tmp); if (result != KERN_SUCCESS) { (void) vm_map_remove(my_map, vm_map_trunc_page(map_addr), vm_map_round_page(map_addr + map_size), VM_MAP_NO_FLAGS); (void)vnode_put(vp); err = result; goto bad; } result = vm_map_copy_overwrite(my_map, (vm_map_address_t)dst_addr, tmp, FALSE); if (result != KERN_SUCCESS) { vm_map_copy_discard(tmp); (void)vnode_put(vp); err = result; goto bad; } } else { if (copyout(&map_addr, CAST_USER_ADDR_T(va), sizeof (map_addr))) { (void) vm_map_remove(my_map, vm_map_trunc_page(map_addr), vm_map_round_page(map_addr + map_size), VM_MAP_NO_FLAGS); (void)vnode_put(vp); err = KERN_INVALID_ADDRESS; goto bad; } } ubc_setthreadcred(vp, current_proc(), current_thread()); (void)ubc_map(vp, (PROT_READ | PROT_EXEC)); (void)vnode_put(vp); err = 0; bad: fp_drop(p, fd, fp, 0); return (err); }
/* * shared_region_map_np() * * This system call is intended for dyld. * * dyld uses this to map a shared cache file into a shared region. * This is usually done only the first time a shared cache is needed. * Subsequent processes will just use the populated shared region without * requiring any further setup. */ int shared_region_map_np( struct proc *p, struct shared_region_map_np_args *uap, __unused int *retvalp) { int error; kern_return_t kr; int fd; struct fileproc *fp; struct vnode *vp, *root_vp; struct vnode_attr va; off_t fs; memory_object_size_t file_size; user_addr_t user_mappings; struct shared_file_mapping_np *mappings; #define SFM_MAX_STACK 8 struct shared_file_mapping_np stack_mappings[SFM_MAX_STACK]; unsigned int mappings_count; vm_size_t mappings_size; memory_object_control_t file_control; struct vm_shared_region *shared_region; SHARED_REGION_TRACE_DEBUG( ("shared_region: %p [%d(%s)] -> map\n", current_thread(), p->p_pid, p->p_comm)); shared_region = NULL; mappings_count = 0; mappings_size = 0; mappings = NULL; fp = NULL; vp = NULL; /* get file descriptor for shared region cache file */ fd = uap->fd; /* get file structure from file descriptor */ error = fp_lookup(p, fd, &fp, 0); if (error) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map: " "fd=%d lookup failed (error=%d)\n", current_thread(), p->p_pid, p->p_comm, fd, error)); goto done; } /* make sure we're attempting to map a vnode */ if (fp->f_fglob->fg_type != DTYPE_VNODE) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map: " "fd=%d not a vnode (type=%d)\n", current_thread(), p->p_pid, p->p_comm, fd, fp->f_fglob->fg_type)); error = EINVAL; goto done; } /* we need at least read permission on the file */ if (! (fp->f_fglob->fg_flag & FREAD)) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map: " "fd=%d not readable\n", current_thread(), p->p_pid, p->p_comm, fd)); error = EPERM; goto done; } /* get vnode from file structure */ error = vnode_getwithref((vnode_t) fp->f_fglob->fg_data); if (error) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map: " "fd=%d getwithref failed (error=%d)\n", current_thread(), p->p_pid, p->p_comm, fd, error)); goto done; } vp = (struct vnode *) fp->f_fglob->fg_data; /* make sure the vnode is a regular file */ if (vp->v_type != VREG) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "not a file (type=%d)\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, vp->v_type)); error = EINVAL; goto done; } /* make sure vnode is on the process's root volume */ root_vp = p->p_fd->fd_rdir; if (root_vp == NULL) { root_vp = rootvnode; } if (vp->v_mount != root_vp->v_mount) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "not on process's root volume\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name)); error = EPERM; goto done; } /* make sure vnode is owned by "root" */ VATTR_INIT(&va); VATTR_WANTED(&va, va_uid); error = vnode_getattr(vp, &va, vfs_context_current()); if (error) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "vnode_getattr(%p) failed (error=%d)\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, vp, error)); goto done; } if (va.va_uid != 0) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "owned by uid=%d instead of 0\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, va.va_uid)); error = EPERM; goto done; } /* get vnode size */ error = vnode_size(vp, &fs, vfs_context_current()); if (error) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "vnode_size(%p) failed (error=%d)\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, vp, error)); goto done; } file_size = fs; /* get the file's memory object handle */ file_control = ubc_getobject(vp, UBC_HOLDOBJECT); if (file_control == MEMORY_OBJECT_CONTROL_NULL) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "no memory object\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name)); error = EINVAL; goto done; } /* get the list of mappings the caller wants us to establish */ mappings_count = uap->count; /* number of mappings */ mappings_size = (vm_size_t) (mappings_count * sizeof (mappings[0])); if (mappings_count == 0) { SHARED_REGION_TRACE_INFO( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "no mappings\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name)); error = 0; /* no mappings: we're done ! */ goto done; } else if (mappings_count <= SFM_MAX_STACK) { mappings = &stack_mappings[0]; } else { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "too many mappings (%d)\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, mappings_count)); error = EINVAL; goto done; } user_mappings = uap->mappings; /* the mappings, in user space */ error = copyin(user_mappings, mappings, mappings_size); if (error) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "copyin(0x%llx, %d) failed (error=%d)\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, (uint64_t)user_mappings, mappings_count, error)); goto done; } /* get the process's shared region (setup in vm_map_exec()) */ shared_region = vm_shared_region_get(current_task()); if (shared_region == NULL) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "no shared region\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name)); goto done; } /* map the file into that shared region's submap */ kr = vm_shared_region_map_file(shared_region, mappings_count, mappings, file_control, file_size, (void *) p->p_fd->fd_rdir); if (kr != KERN_SUCCESS) { SHARED_REGION_TRACE_ERROR( ("shared_region: %p [%d(%s)] map(%p:'%s'): " "vm_shared_region_map_file() failed kr=0x%x\n", current_thread(), p->p_pid, p->p_comm, vp, vp->v_name, kr)); switch (kr) { case KERN_INVALID_ADDRESS: error = EFAULT; break; case KERN_PROTECTION_FAILURE: error = EPERM; break; case KERN_NO_SPACE: error = ENOMEM; break; case KERN_FAILURE: case KERN_INVALID_ARGUMENT: default: error = EINVAL; break; } goto done; } /* * The mapping was successful. Let the buffer cache know * that we've mapped that file with these protections. This * prevents the vnode from getting recycled while it's mapped. */ (void) ubc_map(vp, VM_PROT_READ); error = 0; /* update the vnode's access time */ if (! (vnode_vfsvisflags(vp) & MNT_NOATIME)) { VATTR_INIT(&va); nanotime(&va.va_access_time); VATTR_SET_ACTIVE(&va, va_access_time); vnode_setattr(vp, &va, vfs_context_current()); } if (p->p_flag & P_NOSHLIB) { /* signal that this process is now using split libraries */ OSBitAndAtomic(~((uint32_t)P_NOSHLIB), (UInt32 *)&p->p_flag); } done: if (vp != NULL) { /* * release the vnode... * ubc_map() still holds it for us in the non-error case */ (void) vnode_put(vp); vp = NULL; } if (fp != NULL) { /* release the file descriptor */ fp_drop(p, fd, fp, 0); fp = NULL; } if (shared_region != NULL) { vm_shared_region_deallocate(shared_region); } SHARED_REGION_TRACE_DEBUG( ("shared_region: %p [%d(%s)] <- map\n", current_thread(), p->p_pid, p->p_comm)); return error; }