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 #include <sys/cmn_err.h>
     46     0  stevel 
     47     0  stevel /*
     48     0  stevel  * CTFS routines for the /system/contract/all/<ctid> vnode.
     49     0  stevel  */
     50     0  stevel 
     51     0  stevel /*
     52     0  stevel  * ctfs_create_symnode
     53     0  stevel  *
     54     0  stevel  * Creates and returns a symnode for the specified contract.
     55     0  stevel  */
     56     0  stevel vnode_t *
     57     0  stevel ctfs_create_symnode(vnode_t *pvp, contract_t *ct)
     58     0  stevel {
     59     0  stevel 	ctfs_symnode_t *symnode;
     60     0  stevel 	vnode_t *vp;
     61     0  stevel 	size_t len;
     62     0  stevel 
     63     0  stevel 	vp = gfs_file_create(sizeof (ctfs_symnode_t), pvp, ctfs_ops_sym);
     64     0  stevel 	vp->v_type = VLNK;
     65     0  stevel 	symnode = vp->v_data;
     66     0  stevel 
     67     0  stevel 	symnode->ctfs_sn_contract = ct;
     68     0  stevel 	symnode->ctfs_sn_size = len = snprintf(NULL, 0, "../%s/%ld",
     69     0  stevel 	    ct->ct_type->ct_type_name, (long)ct->ct_id) + 1;
     70     0  stevel 	symnode->ctfs_sn_string = kmem_alloc(len, KM_SLEEP);
     71     0  stevel 	VERIFY(snprintf(symnode->ctfs_sn_string, len, "../%s/%ld",
     72     0  stevel 	    ct->ct_type->ct_type_name, (long)ct->ct_id) < len);
     73     0  stevel 
     74     0  stevel 	contract_hold(ct);
     75     0  stevel 
     76     0  stevel 	return (vp);
     77     0  stevel }
     78     0  stevel 
     79     0  stevel /*
     80     0  stevel  * ctfs_sym_getattr - VOP_GETATTR entry point
     81     0  stevel  */
     82     0  stevel /* ARGSUSED */
     83     0  stevel static int
     84  5331     amw ctfs_sym_getattr(
     85  5331     amw 	vnode_t *vp,
     86  5331     amw 	vattr_t *vap,
     87  5331     amw 	int flags,
     88  5331     amw 	cred_t *cr,
     89  5331     amw 	caller_context_t *ct)
     90     0  stevel {
     91     0  stevel 	ctfs_symnode_t *symnode = vp->v_data;
     92     0  stevel 
     93     0  stevel 	vap->va_type = VLNK;
     94     0  stevel 	vap->va_mode = 0444;
     95     0  stevel 	vap->va_nlink = 1;
     96     0  stevel 	vap->va_size = symnode->ctfs_sn_size - 1;
     97     0  stevel 	vap->va_mtime = vap->va_atime = vap->va_ctime =
     98     0  stevel 	    symnode->ctfs_sn_contract->ct_ctime;
     99     0  stevel 	ctfs_common_getattr(vp, vap);
    100     0  stevel 
    101     0  stevel 	return (0);
    102     0  stevel }
    103     0  stevel 
    104     0  stevel /*
    105     0  stevel  * ctfs_sym_readlink - VOP_READLINK entry point
    106     0  stevel  *
    107     0  stevel  * Since we built the symlink string in ctfs_create_symnode, this is
    108     0  stevel  * just a uiomove.
    109     0  stevel  */
    110     0  stevel /* ARGSUSED */
    111     0  stevel int
    112  5331     amw ctfs_sym_readlink(vnode_t *vp, uio_t *uiop, cred_t *cr, caller_context_t *ct)
    113     0  stevel {
    114     0  stevel 	ctfs_symnode_t *symnode = vp->v_data;
    115     0  stevel 
    116     0  stevel 	return (uiomove(symnode->ctfs_sn_string, symnode->ctfs_sn_size - 1,
    117     0  stevel 	    UIO_READ, uiop));
    118     0  stevel }
    119     0  stevel 
    120     0  stevel /*
    121     0  stevel  * ctfs_sym_inactive - VOP_INACTIVE entry point
    122     0  stevel  */
    123     0  stevel /* ARGSUSED */
    124     0  stevel static void
    125  5331     amw ctfs_sym_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
    126     0  stevel {
    127     0  stevel 	ctfs_symnode_t *symnode;
    128     0  stevel 
    129     0  stevel 	if ((symnode = gfs_file_inactive(vp)) != NULL) {
    130     0  stevel 		contract_rele(symnode->ctfs_sn_contract);
    131     0  stevel 		kmem_free(symnode->ctfs_sn_string, symnode->ctfs_sn_size);
    132     0  stevel 		kmem_free(symnode, sizeof (ctfs_symnode_t));
    133     0  stevel 	}
    134     0  stevel }
    135     0  stevel 
    136     0  stevel const fs_operation_def_t ctfs_tops_sym[] = {
    137  3898     rsb 	{ VOPNAME_OPEN,		{ .vop_open = ctfs_open } },
    138  3898     rsb 	{ VOPNAME_CLOSE,	{ .vop_close = ctfs_close } },
    139  3898     rsb 	{ VOPNAME_IOCTL,	{ .error = fs_inval } },
    140  3898     rsb 	{ VOPNAME_GETATTR,	{ .vop_getattr = ctfs_sym_getattr } },
    141  3898     rsb 	{ VOPNAME_READLINK,	{ .vop_readlink = ctfs_sym_readlink } },
    142  3898     rsb 	{ VOPNAME_ACCESS,	{ .vop_access = ctfs_access_readonly } },
    143  3898     rsb 	{ VOPNAME_READDIR,	{ .error = fs_notdir } },
    144  3898     rsb 	{ VOPNAME_LOOKUP,	{ .error = fs_notdir } },
    145  3898     rsb 	{ VOPNAME_INACTIVE,	{ .vop_inactive = ctfs_sym_inactive } },
    146     0  stevel 	{ NULL, NULL }
    147     0  stevel };
    148