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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/time.h> 31 #include <sys/cred.h> 32 #include <sys/vfs.h> 33 #include <sys/vfs_opreg.h> 34 #include <sys/gfs.h> 35 #include <sys/vnode.h> 36 #include <sys/systm.h> 37 #include <sys/errno.h> 38 #include <sys/sysmacros.h> 39 #include <fs/fs_subr.h> 40 #include <sys/contract.h> 41 #include <sys/contract_impl.h> 42 #include <sys/ctfs.h> 43 #include <sys/ctfs_impl.h> 44 #include <sys/file.h> 45 #include <sys/cmn_err.h> 46 47 /* 48 * CTFS routines for the /system/contract/all/<ctid> vnode. 49 */ 50 51 /* 52 * ctfs_create_symnode 53 * 54 * Creates and returns a symnode for the specified contract. 55 */ 56 vnode_t * 57 ctfs_create_symnode(vnode_t *pvp, contract_t *ct) 58 { 59 ctfs_symnode_t *symnode; 60 vnode_t *vp; 61 size_t len; 62 63 vp = gfs_file_create(sizeof (ctfs_symnode_t), pvp, ctfs_ops_sym); 64 vp->v_type = VLNK; 65 symnode = vp->v_data; 66 67 symnode->ctfs_sn_contract = ct; 68 symnode->ctfs_sn_size = len = snprintf(NULL, 0, "../%s/%ld", 69 ct->ct_type->ct_type_name, (long)ct->ct_id) + 1; 70 symnode->ctfs_sn_string = kmem_alloc(len, KM_SLEEP); 71 VERIFY(snprintf(symnode->ctfs_sn_string, len, "../%s/%ld", 72 ct->ct_type->ct_type_name, (long)ct->ct_id) < len); 73 74 contract_hold(ct); 75 76 return (vp); 77 } 78 79 /* 80 * ctfs_sym_getattr - VOP_GETATTR entry point 81 */ 82 /* ARGSUSED */ 83 static int 84 ctfs_sym_getattr( 85 vnode_t *vp, 86 vattr_t *vap, 87 int flags, 88 cred_t *cr, 89 caller_context_t *ct) 90 { 91 ctfs_symnode_t *symnode = vp->v_data; 92 93 vap->va_type = VLNK; 94 vap->va_mode = 0444; 95 vap->va_nlink = 1; 96 vap->va_size = symnode->ctfs_sn_size - 1; 97 vap->va_mtime = vap->va_atime = vap->va_ctime = 98 symnode->ctfs_sn_contract->ct_ctime; 99 ctfs_common_getattr(vp, vap); 100 101 return (0); 102 } 103 104 /* 105 * ctfs_sym_readlink - VOP_READLINK entry point 106 * 107 * Since we built the symlink string in ctfs_create_symnode, this is 108 * just a uiomove. 109 */ 110 /* ARGSUSED */ 111 int 112 ctfs_sym_readlink(vnode_t *vp, uio_t *uiop, cred_t *cr, caller_context_t *ct) 113 { 114 ctfs_symnode_t *symnode = vp->v_data; 115 116 return (uiomove(symnode->ctfs_sn_string, symnode->ctfs_sn_size - 1, 117 UIO_READ, uiop)); 118 } 119 120 /* 121 * ctfs_sym_inactive - VOP_INACTIVE entry point 122 */ 123 /* ARGSUSED */ 124 static void 125 ctfs_sym_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 126 { 127 ctfs_symnode_t *symnode; 128 129 if ((symnode = gfs_file_inactive(vp)) != NULL) { 130 contract_rele(symnode->ctfs_sn_contract); 131 kmem_free(symnode->ctfs_sn_string, symnode->ctfs_sn_size); 132 kmem_free(symnode, sizeof (ctfs_symnode_t)); 133 } 134 } 135 136 const fs_operation_def_t ctfs_tops_sym[] = { 137 { VOPNAME_OPEN, { .vop_open = ctfs_open } }, 138 { VOPNAME_CLOSE, { .vop_close = ctfs_close } }, 139 { VOPNAME_IOCTL, { .error = fs_inval } }, 140 { VOPNAME_GETATTR, { .vop_getattr = ctfs_sym_getattr } }, 141 { VOPNAME_READLINK, { .vop_readlink = ctfs_sym_readlink } }, 142 { VOPNAME_ACCESS, { .vop_access = ctfs_access_readonly } }, 143 { VOPNAME_READDIR, { .error = fs_notdir } }, 144 { VOPNAME_LOOKUP, { .error = fs_notdir } }, 145 { VOPNAME_INACTIVE, { .vop_inactive = ctfs_sym_inactive } }, 146 { NULL, NULL } 147 }; 148