kernel/fs/ctfs/ctfs_tdir.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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <sys/types.h>
  29 #include <sys/param.h>
  30 #include <sys/time.h>
  31 #include <sys/cred.h>
  32 #include <sys/vfs.h>
  33 #include <sys/gfs.h>
  34 #include <sys/vnode.h>
  35 #include <sys/systm.h>
  36 #include <sys/errno.h>
  37 #include <sys/sysmacros.h>
  38 #include <sys/fs_subr.h>
  39 #include <sys/contract.h>
  40 #include <sys/contract_impl.h>
  41 #include <sys/ctfs.h>
  42 #include <sys/ctfs_impl.h>
  43 #include <sys/file.h>
  44 #include <sys/pathname.h>
  45
  46 /*
  47  * Entries in a /system/contract/<type> directory.
  48  */
  49 static gfs_dirent_t ctfs_tdir_dirents[] = {
  50         { "bundle", ctfs_create_bundle },
  51         { "pbundle", ctfs_create_pbundle },
  52         { "template", ctfs_create_tmplnode },
  53         { "latest", ctfs_create_latenode, GFS_CACHE_VNODE },
  54         { NULL }
  55 };
  56 #define CTFS_NSPECIALS  ((sizeof ctfs_tdir_dirents / sizeof (gfs_dirent_t)) - 1)
  57
  58 static int ctfs_tdir_do_readdir(vnode_t *, void *, int *, offset_t *,
  59     offset_t *, void *, int);
  60 static int ctfs_tdir_do_lookup(vnode_t *, const char *, vnode_t **, ino64_t *,
  61     cred_t *, int, int *, pathname_t *);
  62 static ino64_t ctfs_tdir_do_inode(vnode_t *, int);
  63
  64 /*
  65  * ctfs_create_tdirnode
  66  */
  67 vnode_t *
  68 ctfs_create_tdirnode(vnode_t *pvp)
  69 {
  70         return (gfs_dir_create(sizeof (ctfs_tdirnode_t), pvp, &ctfs_ops_tdir,
  71             ctfs_tdir_dirents, ctfs_tdir_do_inode, CTFS_NAME_MAX,
  72             ctfs_tdir_do_readdir, ctfs_tdir_do_lookup));
  73 }
  74
  75 /*
  76  * ctfs_tdir_getattr - fop_getattr entry point
  77  */
  78 /* ARGSUSED */
  79 static int
  80 ctfs_tdir_getattr(
  81         vnode_t *vp,
  82         vattr_t *vap,
  83         int flags,
  84         cred_t *cr,
  85         caller_context_t *ct)
  86 {
  87         vap->va_type = VDIR;
  88         vap->va_mode = 0555;
  89         vap->va_nlink = 2 + CTFS_NSPECIALS;
  90         vap->va_size = vap->va_nlink +
  91             contract_type_count(ct_types[gfs_file_index(vp)]);
  92         vap->va_ctime.tv_sec = vp->v_vfsp->vfs_mtime;
  93         vap->va_ctime.tv_nsec = 0;
  94         contract_type_time(ct_types[gfs_file_index(vp)], &vap->va_atime);
  95         vap->va_mtime = vap->va_atime;
  96         ctfs_common_getattr(vp, vap);
  97
  98         return (0);
  99 }
 100
 101 static ino64_t
 102 ctfs_tdir_do_inode(vnode_t *vp, int index)
 103 {
 104         return (CTFS_INO_TYPE_FILE(gfs_file_index(vp), index));
 105 }
 106
 107 /* ARGSUSED */
 108 static int
 109 ctfs_tdir_do_readdir(vnode_t *vp, void *dp, int *eofp,
 110     offset_t *offp, offset_t *nextp, void *data, int flags)
 111 {
 112         uint64_t zuniqid;
 113         ctid_t next;
 114         ct_type_t *ty = ct_types[gfs_file_index(vp)];
 115         struct dirent64 *odp = dp;
 116
 117         ASSERT(!(flags & V_RDDIR_ENTFLAGS));
 118
 119         zuniqid = VTOZONE(vp)->zone_uniqid;
 120         next = contract_type_lookup(ty, zuniqid, *offp);
 121
 122         if (next == -1) {
 123                 *eofp = 1;
 124                 return (0);
 125         }
 126
 127         odp->d_ino = CTFS_INO_CT_DIR(next);
 128         numtos(next, odp->d_name);
 129         *offp = next;
 130         *nextp = next + 1;
 131
 132         return (0);
 133 }
 134
 135 /* ARGSUSED */
 136 static int
 137 ctfs_tdir_do_lookup(vnode_t *vp, const char *nm, vnode_t **vpp, ino64_t *inop,
 138     cred_t *cr, int flags, int *deflags, pathname_t *rpnp)
 139 {
 140         int i;
 141         contract_t *ct;
 142
 143         i = stoi((char **)&nm);
 144         if (*nm != '\0')
 145                 return (ENOENT);
 146
 147         ct = contract_type_ptr(ct_types[gfs_file_index(vp)], i,
 148             VTOZONE(vp)->zone_uniqid);
 149         if (ct == NULL)
 150                 return (ENOENT);
 151
 152         *vpp = ctfs_create_cdirnode(vp, ct);
 153         *inop = gfs_file_inode(*vpp);
 154         contract_rele(ct);
 155         return (0);
 156 }
 157
 158 const struct vnodeops ctfs_ops_tdir = {
 159         .vnop_name = "ctfs template directory",
 160         .vop_open = ctfs_open,
 161         .vop_close = ctfs_close,
 162         .vop_ioctl = fs_inval,
 163         .vop_getattr = ctfs_tdir_getattr,
 164         .vop_access = ctfs_access_dir,
 165         .vop_readdir = gfs_vop_readdir,
 166         .vop_lookup = gfs_vop_lookup,
 167         .vop_seek = fs_seek,
 168         .vop_inactive = gfs_vop_inactive,
 169 };