1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2015, Joyent Inc. 25 * Copyright 2017 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 /* 32 * The kTLI "shim" over in ./fake_ktli.c uses getf(), releasef() to 33 * represent an open socket FD in "fake" vnode_t and file_t objects. 34 * This implements minimal getf()/releasef() shims for that purpose. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/sysmacros.h> 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/cred.h> 43 #include <sys/user.h> 44 #include <sys/vfs.h> 45 #include <sys/vnode.h> 46 #include <sys/file.h> 47 #include <sys/debug.h> 48 #include <sys/kmem.h> 49 50 #define FAKEFDS 256 51 52 kmutex_t ftlock; 53 file_t *ftab[FAKEFDS]; 54 55 file_t * 56 getf(int fd) 57 { 58 file_t *fp; 59 vnode_t *vp; 60 61 if (fd >= FAKEFDS) 62 return (NULL); 63 64 mutex_enter(&ftlock); 65 if ((fp = ftab[fd]) != NULL) { 66 fp->f_count++; 67 mutex_exit(&ftlock); 68 return (fp); 69 } 70 71 fp = kmem_zalloc(sizeof (*fp), KM_SLEEP); 72 vp = kmem_zalloc(sizeof (*vp), KM_SLEEP); 73 vp->v_fd = fd; 74 fp->f_vnode = vp; 75 fp->f_count = 1; 76 ftab[fd] = fp; 77 78 mutex_exit(&ftlock); 79 80 return (fp); 81 } 82 83 void 84 releasef(int fd) 85 { 86 file_t *fp; 87 vnode_t *vp; 88 89 mutex_enter(&ftlock); 90 if ((fp = ftab[fd]) == NULL) { 91 mutex_exit(&ftlock); 92 return; 93 } 94 fp->f_count--; 95 if (fp->f_count > 0) { 96 mutex_exit(&ftlock); 97 return; 98 } 99 ftab[fd] = NULL; 100 mutex_exit(&ftlock); 101 102 vp = fp->f_vnode; 103 kmem_free(vp, sizeof (*vp)); 104 kmem_free(fp, sizeof (*fp)); 105 } 106