fs/ctfs/ctfs_tdir.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/cred.h>
#include <sys/vfs.h>
#include <sys/vfs_opreg.h>
#include <sys/gfs.h>
#include <sys/vnode.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/sysmacros.h>
#include <fs/fs_subr.h>
#include <sys/contract.h>
#include <sys/contract_impl.h>
#include <sys/ctfs.h>
#include <sys/ctfs_impl.h>
#include <sys/file.h>
#include <sys/pathname.h>

/*
 * Entries in a /system/contract/<type> directory.
 */
static gfs_dirent_t ctfs_tdir_dirents[] = {
    { "bundle", ctfs_create_bundle },
    { "pbundle", ctfs_create_pbundle },
    { "template", ctfs_create_tmplnode },
    { "latest", ctfs_create_latenode, GFS_CACHE_VNODE },
    { NULL }
};
#define CTFS_NSPECIALS  ((sizeof ctfs_tdir_dirents / sizeof (gfs_dirent_t)) - 1)

static int ctfs_tdir_do_readdir(vnode_t *, void *, int *, offset_t *,
    offset_t *, void *, int);
static int ctfs_tdir_do_lookup(vnode_t *, const char *, vnode_t **, ino64_t *,
    cred_t *, int, int *, pathname_t *);
static ino64_t ctfs_tdir_do_inode(vnode_t *, int);

/*
 * ctfs_create_tdirnode
 */
vnode_t *
ctfs_create_tdirnode(vnode_t *pvp)
{
    return (gfs_dir_create(sizeof (ctfs_tdirnode_t), pvp, ctfs_ops_tdir,
        ctfs_tdir_dirents, ctfs_tdir_do_inode, CTFS_NAME_MAX,
        ctfs_tdir_do_readdir, ctfs_tdir_do_lookup));
}

/*
 * ctfs_tdir_getattr - VOP_GETATTR entry point
 */
/* ARGSUSED */
static int
ctfs_tdir_getattr(
    vnode_t *vp,
    vattr_t *vap,
    int flags,
    cred_t *cr,
    caller_context_t *ct)
{
    vap->va_type = VDIR;
    vap->va_mode = 0555;
    vap->va_nlink = 2 + CTFS_NSPECIALS;
    vap->va_size = vap->va_nlink +
        contract_type_count(ct_types[gfs_file_index(vp)]);
    vap->va_ctime.tv_sec = vp->v_vfsp->vfs_mtime;
    vap->va_ctime.tv_nsec = 0;
    contract_type_time(ct_types[gfs_file_index(vp)], &vap->va_atime);
    vap->va_mtime = vap->va_atime;
    ctfs_common_getattr(vp, vap);

    return (0);
}

static ino64_t
ctfs_tdir_do_inode(vnode_t *vp, int index)
{
    return (CTFS_INO_TYPE_FILE(gfs_file_index(vp), index));
}

/* ARGSUSED */
static int
ctfs_tdir_do_readdir(vnode_t *vp, void *dp, int *eofp,
    offset_t *offp, offset_t *nextp, void *data, int flags)
{
    uint64_t zuniqid;
    ctid_t next;
    ct_type_t *ty = ct_types[gfs_file_index(vp)];
    struct dirent64 *odp = dp;

    ASSERT(!(flags & V_RDDIR_ENTFLAGS));

    zuniqid = VTOZONE(vp)->zone_uniqid;
    next = contract_type_lookup(ty, zuniqid, *offp);

    if (next == -1) {
        *eofp = 1;
        return (0);
    }

    odp->d_ino = CTFS_INO_CT_DIR(next);
    numtos(next, odp->d_name);
    *offp = next;
    *nextp = next + 1;

    return (0);
}

/* ARGSUSED */
static int
ctfs_tdir_do_lookup(vnode_t *vp, const char *nm, vnode_t **vpp, ino64_t *inop,
    cred_t *cr, int flags, int *deflags, pathname_t *rpnp)
{
    int i;
    contract_t *ct;

    i = stoi((char **)&nm);
    if (*nm != '\0')
        return (ENOENT);

    ct = contract_type_ptr(ct_types[gfs_file_index(vp)], i,
        VTOZONE(vp)->zone_uniqid);
    if (ct == NULL)
        return (ENOENT);

    *vpp = ctfs_create_cdirnode(vp, ct);
    *inop = gfs_file_inode(*vpp);
    contract_rele(ct);
    return (0);
}

const fs_operation_def_t ctfs_tops_tdir[] = {
    { VOPNAME_OPEN,     { .vop_open = ctfs_open } },
    { VOPNAME_CLOSE,    { .vop_close = ctfs_close } },
    { VOPNAME_IOCTL,    { .error = fs_inval } },
    { VOPNAME_GETATTR,  { .vop_getattr = ctfs_tdir_getattr } },
    { VOPNAME_ACCESS,   { .vop_access = ctfs_access_dir } },
    { VOPNAME_READDIR,  { .vop_readdir = gfs_vop_readdir } },
    { VOPNAME_LOOKUP,   { .vop_lookup = gfs_vop_lookup } },
    { VOPNAME_SEEK,     { .vop_seek = fs_seek } },
    { VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } },
    { NULL, NULL }
};