Home | History | Annotate | Download | only in ctfs
      1     0  stevel /*
      2     0  stevel  * CDDL HEADER START
      3     0  stevel  *
      4     0  stevel  * The contents of this file are subject to the terms of the
      5  3898     rsb  * Common Development and Distribution License (the "License").
      6  3898     rsb  * You may not use this file except in compliance with the License.
      7     0  stevel  *
      8     0  stevel  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9     0  stevel  * or http://www.opensolaris.org/os/licensing.
     10     0  stevel  * See the License for the specific language governing permissions
     11     0  stevel  * and limitations under the License.
     12     0  stevel  *
     13     0  stevel  * When distributing Covered Code, include this CDDL HEADER in each
     14     0  stevel  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15     0  stevel  * If applicable, add the following below this CDDL HEADER, with the
     16     0  stevel  * fields enclosed by brackets "[]" replaced with your own identifying
     17     0  stevel  * information: Portions Copyright [yyyy] [name of copyright owner]
     18     0  stevel  *
     19     0  stevel  * CDDL HEADER END
     20     0  stevel  */
     21     0  stevel /*
     22  3898     rsb  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     23     0  stevel  * Use is subject to license terms.
     24     0  stevel  */
     25     0  stevel 
     26     0  stevel #pragma ident	"%Z%%M%	%I%	%E% SMI"
     27     0  stevel 
     28     0  stevel #include <sys/types.h>
     29     0  stevel #include <sys/param.h>
     30     0  stevel #include <sys/time.h>
     31     0  stevel #include <sys/cred.h>
     32     0  stevel #include <sys/vfs.h>
     33  3898     rsb #include <sys/vfs_opreg.h>
     34     0  stevel #include <sys/gfs.h>
     35     0  stevel #include <sys/vnode.h>
     36     0  stevel #include <sys/systm.h>
     37     0  stevel #include <sys/errno.h>
     38     0  stevel #include <sys/sysmacros.h>
     39     0  stevel #include <fs/fs_subr.h>
     40     0  stevel #include <sys/contract.h>
     41     0  stevel #include <sys/contract_impl.h>
     42     0  stevel #include <sys/ctfs.h>
     43     0  stevel #include <sys/ctfs_impl.h>
     44     0  stevel #include <sys/file.h>
     45     0  stevel 
     46     0  stevel /*
     47     0  stevel  * CTFS routines for the /system/contract/<type>/<ctid>/ctl vnode.
     48     0  stevel  * CTFS routines for the /system/contract/<type>/<ctid>/status vnode.
     49     0  stevel  */
     50     0  stevel 
     51     0  stevel /*
     52     0  stevel  * ctfs_create_ctlnode
     53     0  stevel  *
     54     0  stevel  * If necessary, creates a ctlnode for a ctl file and inserts it into
     55     0  stevel  * the specified cdirnode's gfs_dir_t.  Returns either the existing
     56     0  stevel  * vnode or the new one.
     57     0  stevel  */
     58     0  stevel vnode_t *
     59     0  stevel ctfs_create_ctlnode(vnode_t *pvp)
     60     0  stevel {
     61     0  stevel 	ctfs_ctlnode_t *ctlnode;
     62     0  stevel 	ctfs_cdirnode_t *cdirnode = pvp->v_data;
     63     0  stevel 	vnode_t *vp;
     64     0  stevel 
     65     0  stevel 	vp = gfs_file_create(sizeof (ctfs_ctlnode_t), pvp, ctfs_ops_ctl);
     66     0  stevel 	ctlnode = vp->v_data;
     67     0  stevel 	/*
     68     0  stevel 	 * We transitively have a hold on the contract through our
     69     0  stevel 	 * parent directory.
     70     0  stevel 	 */
     71     0  stevel 	ctlnode->ctfs_ctl_contract = cdirnode->ctfs_cn_contract;
     72     0  stevel 
     73     0  stevel 	return (vp);
     74     0  stevel }
     75     0  stevel 
     76     0  stevel /*
     77     0  stevel  * ctfs_ctl_access - VOP_ACCESS entry point
     78     0  stevel  *
     79     0  stevel  * You only get to access ctl files for contracts you own or were
     80     0  stevel  * abandoned and inherited by your containing process contract.
     81     0  stevel  */
     82     0  stevel /* ARGSUSED */
     83     0  stevel static int
     84  5331     amw ctfs_ctl_access(
     85  5331     amw 	vnode_t *vp,
     86  5331     amw 	int mode,
     87  5331     amw 	int flags,
     88  5331     amw 	cred_t *cr,
     89  5331     amw 	caller_context_t *cct)
     90     0  stevel {
     91     0  stevel 	ctfs_ctlnode_t *ctlnode = vp->v_data;
     92     0  stevel 	contract_t *ct = ctlnode->ctfs_ctl_contract;
     93     0  stevel 
     94     0  stevel 	if (mode & (VEXEC | VREAD))
     95     0  stevel 		return (EACCES);
     96     0  stevel 
     97     0  stevel 	mutex_enter(&ct->ct_lock);
     98     0  stevel 	if ((curproc == ct->ct_owner) ||
     99     0  stevel 	    (ct->ct_owner == NULL && ct->ct_regent != NULL &&
    100     0  stevel 	    ct->ct_regent->ct_data == curproc->p_ct_process)) {
    101     0  stevel 		mutex_exit(&ct->ct_lock);
    102     0  stevel 		return (0);
    103     0  stevel 	}
    104     0  stevel 
    105     0  stevel 	mutex_exit(&ct->ct_lock);
    106     0  stevel 	return (EACCES);
    107     0  stevel }
    108     0  stevel 
    109     0  stevel /*
    110     0  stevel  * ctfs_ctl_open - VOP_OPEN entry point
    111     0  stevel  *
    112     0  stevel  * Just checks to make sure the mode bits are set, and that the
    113     0  stevel  * constraints imposed by ctfs_ctl_access are met.
    114     0  stevel  */
    115     0  stevel static int
    116  5331     amw ctfs_ctl_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
    117     0  stevel {
    118     0  stevel 	if (flag != (FWRITE | FOFFMAX))
    119     0  stevel 		return (EINVAL);
    120     0  stevel 
    121  5331     amw 	return (ctfs_ctl_access(*vpp, VWRITE, 0, cr, ct));
    122     0  stevel }
    123     0  stevel 
    124     0  stevel /*
    125  4340   acruz  * ctfs_ctl_common_getattr
    126  5331     amw  * Implements functionality common to ctl and status ctfs VOP_GETATTR
    127  4340   acruz  * entry points. It assumes vp->v_data is set
    128     0  stevel  */
    129     0  stevel static int
    130  4347   acruz ctfs_ctl_common_getattr(vnode_t *vp, vattr_t *vap)
    131     0  stevel {
    132     0  stevel 	ctfs_ctlnode_t *ctlnode = vp->v_data;
    133     0  stevel 
    134     0  stevel 	vap->va_type = VREG;
    135     0  stevel 	vap->va_nlink = 1;
    136     0  stevel 	vap->va_size = 0;
    137     0  stevel 	vap->va_ctime = ctlnode->ctfs_ctl_contract->ct_ctime;
    138     0  stevel 	mutex_enter(&ctlnode->ctfs_ctl_contract->ct_events.ctq_lock);
    139     0  stevel 	vap->va_atime = vap->va_mtime =
    140     0  stevel 	    ctlnode->ctfs_ctl_contract->ct_events.ctq_atime;
    141     0  stevel 	mutex_exit(&ctlnode->ctfs_ctl_contract->ct_events.ctq_lock);
    142     0  stevel 	ctfs_common_getattr(vp, vap);
    143     0  stevel 
    144     0  stevel 	return (0);
    145  4340   acruz }
    146  4340   acruz 
    147  4340   acruz /*
    148  4340   acruz  * ctfs_ctl_getattr - VOP_GETATTR entry point
    149  4340   acruz  */
    150  4340   acruz /* ARGSUSED */
    151  4340   acruz static int
    152  5331     amw ctfs_ctl_getattr(vnode_t *vp, vattr_t *vap, int flags,
    153  5331     amw     cred_t *cr, caller_context_t *ct)
    154  4340   acruz {
    155  4340   acruz 	vap->va_mode = 0222;
    156  4340   acruz 
    157  4347   acruz 	return (ctfs_ctl_common_getattr(vp, vap));
    158  4340   acruz }
    159  4340   acruz 
    160  4340   acruz /*
    161  4340   acruz  * ctfs_stat_getattr - VOP_GETATTR entry point
    162  4340   acruz  */
    163  4340   acruz /* ARGSUSED */
    164  4340   acruz static int
    165  5331     amw ctfs_stat_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
    166  5331     amw     caller_context_t *ct)
    167  4340   acruz {
    168  4340   acruz 	vap->va_mode = 0444;
    169  4340   acruz 
    170  4347   acruz 	return (ctfs_ctl_common_getattr(vp, vap));
    171     0  stevel }
    172     0  stevel 
    173     0  stevel /*
    174     0  stevel  * ctfs_ctl_ioctl - VOP_IOCTL entry point
    175     0  stevel  *
    176     0  stevel  * All the ct_ctl_*(3contract) interfaces point here.
    177     0  stevel  */
    178     0  stevel /* ARGSUSED */
    179     0  stevel static int
    180  5331     amw ctfs_ctl_ioctl(
    181  5331     amw 	vnode_t *vp,
    182  5331     amw 	int cmd,
    183  5331     amw 	intptr_t arg,
    184  5331     amw 	int flag,
    185  5331     amw 	cred_t *cr,
    186  5331     amw 	int *rvalp,
    187  5331     amw 	caller_context_t *cct)
    188     0  stevel {
    189     0  stevel 	ctfs_ctlnode_t	*ctlnode = vp->v_data;
    190     0  stevel 	contract_t	*ct = ctlnode->ctfs_ctl_contract;
    191     0  stevel 	int		error = 0;
    192     0  stevel 	uint64_t	event;
    193  4845  vikram 	int		ack;
    194     0  stevel 
    195     0  stevel 	switch (cmd) {
    196     0  stevel 	case CT_CABANDON:
    197     0  stevel 		error = contract_abandon(ct, curproc, 1);
    198     0  stevel 		break;
    199     0  stevel 
    200     0  stevel 	case CT_CACK:
    201  4845  vikram 	case CT_CNACK:
    202     0  stevel 		if (copyin((void *)arg, &event, sizeof (uint64_t)))
    203     0  stevel 			return (EFAULT);
    204  4845  vikram 		ack = (cmd == CT_CACK) ? CT_ACK : CT_NACK;
    205  4845  vikram 		error = contract_ack(ct, event, ack);
    206     0  stevel 		break;
    207     0  stevel 
    208     0  stevel 	case CT_CNEWCT:
    209  4845  vikram 		error = contract_newct(ct);
    210     0  stevel 		break;
    211     0  stevel 
    212     0  stevel 	case CT_CQREQ:
    213  4845  vikram 		if (copyin((void *)arg, &event, sizeof (uint64_t)))
    214  4845  vikram 			return (EFAULT);
    215  4845  vikram 		error = contract_qack(ct, event);
    216     0  stevel 		break;
    217     0  stevel 
    218     0  stevel 	case CT_CADOPT:
    219     0  stevel 		error = contract_adopt(ct, curproc);
    220     0  stevel 		break;
    221     0  stevel 
    222     0  stevel 	default:
    223     0  stevel 		return (EINVAL);
    224     0  stevel 	}
    225     0  stevel 
    226     0  stevel 	return (error);
    227     0  stevel }
    228     0  stevel 
    229     0  stevel const fs_operation_def_t ctfs_tops_ctl[] = {
    230  3898     rsb 	{ VOPNAME_OPEN,		{ .vop_open = ctfs_ctl_open } },
    231  3898     rsb 	{ VOPNAME_CLOSE,	{ .vop_close = ctfs_close } },
    232  3898     rsb 	{ VOPNAME_IOCTL,	{ .vop_ioctl = ctfs_ctl_ioctl } },
    233  3898     rsb 	{ VOPNAME_GETATTR,	{ .vop_getattr = ctfs_ctl_getattr } },
    234  3898     rsb 	{ VOPNAME_ACCESS,	{ .vop_access = ctfs_ctl_access } },
    235  3898     rsb 	{ VOPNAME_READDIR,	{ .error = fs_notdir } },
    236  3898     rsb 	{ VOPNAME_LOOKUP,	{ .error = fs_notdir } },
    237  3898     rsb 	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive } },
    238     0  stevel 	{ NULL, NULL }
    239     0  stevel };
    240     0  stevel 
    241     0  stevel /*
    242     0  stevel  * ctfs_create_statnode
    243     0  stevel  *
    244     0  stevel  * If necessary, creates a ctlnode for a status file and inserts it
    245     0  stevel  * into the specified cdirnode's gfs_dir_t.  Returns either the
    246     0  stevel  * existing vnode or the new one.
    247     0  stevel  */
    248     0  stevel vnode_t *
    249     0  stevel ctfs_create_statnode(vnode_t *pvp)
    250     0  stevel {
    251     0  stevel 	vnode_t *vp;
    252     0  stevel 	ctfs_cdirnode_t *cdirnode = pvp->v_data;
    253     0  stevel 	ctfs_ctlnode_t *ctlnode;
    254     0  stevel 
    255     0  stevel 	vp = gfs_file_create(sizeof (ctfs_ctlnode_t), pvp, ctfs_ops_stat);
    256     0  stevel 	ctlnode = vp->v_data;
    257     0  stevel 	/*
    258     0  stevel 	 * We transitively have a hold on the contract through our
    259     0  stevel 	 * parent directory.
    260     0  stevel 	 */
    261     0  stevel 	ctlnode->ctfs_ctl_contract = cdirnode->ctfs_cn_contract;
    262     0  stevel 
    263     0  stevel 	return (vp);
    264     0  stevel }
    265     0  stevel 
    266     0  stevel /*
    267     0  stevel  * ctfs_stat_ioctl - VOP_IOCTL entry point
    268     0  stevel  *
    269     0  stevel  * The kernel half of ct_status_read(3contract).
    270     0  stevel  */
    271     0  stevel /* ARGSUSED */
    272     0  stevel static int
    273  5331     amw ctfs_stat_ioctl(
    274  5331     amw 	vnode_t *vp,
    275  5331     amw 	int cmd,
    276  5331     amw 	intptr_t arg,
    277  5331     amw 	int flag,
    278  5331     amw 	cred_t *cr,
    279  5331     amw 	int *rvalp,
    280  5331     amw 	caller_context_t *cct)
    281     0  stevel {
    282     0  stevel 	ctfs_ctlnode_t	*statnode = vp->v_data;
    283     0  stevel 	contract_t	*ct = statnode->ctfs_ctl_contract;
    284     0  stevel 	ct_type_t	*type = ct->ct_type;
    285     0  stevel 	STRUCT_DECL(ct_status, st);
    286     0  stevel 	nvlist_t	*foo;
    287     0  stevel 	char		*bufp = NULL;
    288     0  stevel 	size_t		len;
    289     0  stevel 	model_t		mdl = get_udatamodel();
    290     0  stevel 	uint_t		detail;
    291     0  stevel 
    292     0  stevel 	STRUCT_INIT(st, mdl);
    293     0  stevel 
    294     0  stevel 	if (cmd != CT_SSTATUS)
    295     0  stevel 		return (EINVAL);
    296     0  stevel 
    297     0  stevel 	if (copyin((void *)arg, STRUCT_BUF(st), STRUCT_SIZE(st)))
    298     0  stevel 		return (EFAULT);
    299     0  stevel 	detail = STRUCT_FGET(st, ctst_detail);
    300     0  stevel 	if (detail == CTD_COMMON) {
    301     0  stevel 		mutex_enter(&ct->ct_lock);
    302   789  ahrens 		contract_status_common(ct, VTOZONE(vp), STRUCT_BUF(st), mdl);
    303     0  stevel 		mutex_exit(&ct->ct_lock);
    304     0  stevel 	} else if (detail <= CTD_ALL) {
    305     0  stevel 		VERIFY(nvlist_alloc(&foo, NV_UNIQUE_NAME, KM_SLEEP) == 0);
    306   789  ahrens 		type->ct_type_ops->contop_status(ct, VTOZONE(vp), detail, foo,
    307     0  stevel 		    STRUCT_BUF(st), mdl);
    308     0  stevel 		VERIFY(nvlist_pack(foo, &bufp, &len, NV_ENCODE_NATIVE,
    309     0  stevel 		    KM_SLEEP) == 0);
    310     0  stevel 		nvlist_free(foo);
    311     0  stevel 
    312     0  stevel 		if ((len <= STRUCT_FGET(st, ctst_nbytes)) &&
    313     0  stevel 		    (copyout(bufp, STRUCT_FGETP(st, ctst_buffer), len) == -1)) {
    314     0  stevel 			kmem_free(bufp, len);
    315     0  stevel 			return (EFAULT);
    316     0  stevel 		}
    317     0  stevel 		kmem_free(bufp, len);
    318     0  stevel 		STRUCT_FSET(st, ctst_nbytes, len);
    319     0  stevel 	} else {
    320     0  stevel 		return (EINVAL);
    321     0  stevel 	}
    322     0  stevel 	if (copyout(STRUCT_BUF(st), (void *)arg, STRUCT_SIZE(st)))
    323     0  stevel 		return (EFAULT);
    324     0  stevel 
    325     0  stevel 	return (0);
    326     0  stevel }
    327     0  stevel 
    328     0  stevel const fs_operation_def_t ctfs_tops_stat[] = {
    329  3898     rsb 	{ VOPNAME_OPEN,		{ .vop_open = ctfs_open } },
    330  3898     rsb 	{ VOPNAME_CLOSE,	{ .vop_close = ctfs_close } },
    331  3898     rsb 	{ VOPNAME_IOCTL,	{ .vop_ioctl = ctfs_stat_ioctl } },
    332  4340   acruz 	{ VOPNAME_GETATTR,	{ .vop_getattr = ctfs_stat_getattr } },
    333  3898     rsb 	{ VOPNAME_ACCESS,	{ .vop_access = ctfs_access_readonly } },
    334  3898     rsb 	{ VOPNAME_READDIR,	{ .error = fs_notdir } },
    335  3898     rsb 	{ VOPNAME_LOOKUP,	{ .error = fs_notdir } },
    336  3898     rsb 	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive } },
    337     0  stevel 	{ NULL, NULL }
    338     0  stevel };
    339