kernel/fs/ctfs/ctfs_tmpl.c

   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 2008 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/gfs.h>
  32 #include <sys/vnode.h>
  33 #include <sys/systm.h>
  34 #include <sys/errno.h>
  35 #include <sys/sysmacros.h>
  36 #include <sys/fs_subr.h>
  37 #include <sys/contract.h>
  38 #include <sys/contract_impl.h>
  39 #include <sys/ctfs.h>
  40 #include <sys/ctfs_impl.h>
  41 #include <sys/file.h>
  42 #include <sys/model.h>
  43
  44 /*
  45  * CTFS routines for the /system/contract/<type>/template vnode.
  46  */
  47
  48 /*
  49  * ctfs_create_tmplnode
  50  *
  51  * Creates a new template and tdirnode, and returns the tdirnode.
  52  */
  53 vnode_t *
  54 ctfs_create_tmplnode(vnode_t *pvp)
  55 {
  56         vnode_t *vp;
  57         ctfs_tmplnode_t *tmplnode;
  58
  59         ASSERT(gfs_file_index(pvp) < ct_ntypes);
  60
  61         vp = gfs_file_create(sizeof (ctfs_tmplnode_t), pvp, &ctfs_ops_tmpl);
  62         tmplnode = vp->v_data;
  63         tmplnode->ctfs_tmn_tmpl =
  64             ct_types[gfs_file_index(pvp)]->ct_type_default();
  65
  66         return (vp);
  67 }
  68
  69 /*
  70  * ctfs_tmpl_open - fop_open entry point
  71  *
  72  * Just ensures the right mode bits are set.
  73  */
  74 /* ARGSUSED */
  75 static int
  76 ctfs_tmpl_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
  77 {
  78         if (flag != (FREAD | FWRITE))
  79                 return (EINVAL);
  80
  81         return (0);
  82 }
  83
  84 /*
  85  * ctfs_tmpl_getattr - fop_getattr entry point
  86  */
  87 /* ARGSUSED */
  88 static int
  89 ctfs_tmpl_getattr(
  90         vnode_t *vp,
  91         vattr_t *vap,
  92         int flags,
  93         cred_t *cr,
  94         caller_context_t *ct)
  95 {
  96         vap->va_type = VREG;
  97         vap->va_mode = 0666;
  98         vap->va_nlink = 1;
  99         vap->va_size = 0;
 100         vap->va_ctime.tv_sec = vp->v_vfsp->vfs_mtime;
 101         vap->va_ctime.tv_nsec = 0;
 102         vap->va_atime = vap->va_mtime = vap->va_ctime;
 103         ctfs_common_getattr(vp, vap);
 104
 105         return (0);
 106 }
 107
 108 /*
 109  * ctfs_tmpl_ioctl - fop_ioctl entry point
 110  *
 111  * All the ct_tmpl_*(3contract) interfaces point here.
 112  */
 113 /* ARGSUSED */
 114 static int
 115 ctfs_tmpl_ioctl(
 116         vnode_t *vp,
 117         int cmd,
 118         intptr_t arg,
 119         int flag,
 120         cred_t *cr,
 121         int *rvalp,
 122         caller_context_t *ct)
 123 {
 124         ctfs_tmplnode_t *tmplnode = vp->v_data;
 125         ct_kparam_t kparam;
 126         ct_param_t *param = &kparam.param;
 127         ctid_t ctid;
 128         int error;
 129
 130         switch (cmd) {
 131         case CT_TACTIVATE:
 132                 ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
 133                 ctmpl_activate(tmplnode->ctfs_tmn_tmpl);
 134                 break;
 135         case CT_TCLEAR:
 136                 ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
 137                 ctmpl_clear(tmplnode->ctfs_tmn_tmpl);
 138                 break;
 139         case CT_TCREATE:
 140                 ASSERT(tmplnode->ctfs_tmn_tmpl != NULL);
 141                 error = ctmpl_create(tmplnode->ctfs_tmn_tmpl, &ctid);
 142                 if (error)
 143                         return (error);
 144                 *rvalp = ctid;
 145                 break;
 146         case CT_TSET:
 147                 error = ctparam_copyin((void *)arg, &kparam, flag, cmd);
 148                 if (error != 0)
 149                         return (error);
 150                 error = ctmpl_set(tmplnode->ctfs_tmn_tmpl, &kparam, cr);
 151                 kmem_free(kparam.ctpm_kbuf, param->ctpm_size);
 152
 153                 return (error);
 154         case CT_TGET:
 155                 error = ctparam_copyin((void *)arg, &kparam, flag, cmd);
 156                 if (error != 0)
 157                         return (error);
 158                 error = ctmpl_get(tmplnode->ctfs_tmn_tmpl, &kparam);
 159                 if (error != 0) {
 160                         kmem_free(kparam.ctpm_kbuf, param->ctpm_size);
 161                 } else {
 162                         error = ctparam_copyout(&kparam, (void *)arg, flag);
 163                 }
 164
 165                 return (error);
 166         default:
 167                 return (EINVAL);
 168         }
 169
 170         return (0);
 171 }
 172
 173 /*
 174  * ctfs_tmpl_inactive - fop_inactive entry point
 175  */
 176 /* ARGSUSED */
 177 static void
 178 ctfs_tmpl_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
 179 {
 180         ctfs_tmplnode_t *tmplnode;
 181
 182         if ((tmplnode = gfs_file_inactive(vp)) != NULL) {
 183                 ctmpl_free(tmplnode->ctfs_tmn_tmpl);
 184                 kmem_free(tmplnode, sizeof (ctfs_tmplnode_t));
 185         }
 186 }
 187
 188 const struct vnodeops ctfs_ops_tmpl = {
 189         .vnop_name = "ctfs template file",
 190         .vop_open = ctfs_tmpl_open,
 191         .vop_close = ctfs_close,
 192         .vop_ioctl = ctfs_tmpl_ioctl,
 193         .vop_getattr = ctfs_tmpl_getattr,
 194         .vop_access = ctfs_access_readwrite,
 195         .vop_readdir = fs_notdir,
 196         .vop_lookup = fs_notdir,
 197         .vop_inactive = ctfs_tmpl_inactive,
 198 };