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