1 /*- 2 * Copyright (c) 1982, 1986, 1989, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/mount.h> 43 #include <sys/bio.h> 44 #include <sys/buf.h> 45 #include <sys/vnode.h> 46 #include <sys/malloc.h> 47 #include <sys/stat.h> 48 #include <sys/mutex.h> 49 50 #include <isofs/cd9660/iso.h> 51 #include <isofs/cd9660/cd9660_node.h> 52 #include <isofs/cd9660/cd9660_mount.h> 53 54 static unsigned cd9660_chars2ui(unsigned char *begin, int len); 55 56 /* 57 * Last reference to an inode, write the inode out and if necessary, 58 * truncate and deallocate the file. 59 */ 60 int 61 cd9660_inactive(ap) 62 struct vop_inactive_args /* { 63 struct vnode *a_vp; 64 struct thread *a_td; 65 } */ *ap; 66 { 67 struct vnode *vp = ap->a_vp; 68 struct thread *td = ap->a_td; 69 struct iso_node *ip = VTOI(vp); 70 int error = 0; 71 72 if (prtactive && vrefcnt(vp) != 0) 73 vprint("cd9660_inactive: pushing active", vp); 74 75 ip->i_flag = 0; 76 /* 77 * If we are done with the inode, reclaim it 78 * so that it can be reused immediately. 79 */ 80 if (ip->inode.iso_mode == 0) 81 vrecycle(vp, td); 82 return error; 83 } 84 85 /* 86 * Reclaim an inode so that it can be used for other purposes. 87 */ 88 int 89 cd9660_reclaim(ap) 90 struct vop_reclaim_args /* { 91 struct vnode *a_vp; 92 struct thread *a_td; 93 } */ *ap; 94 { 95 struct vnode *vp = ap->a_vp; 96 struct iso_node *ip = VTOI(vp); 97 98 if (prtactive && vrefcnt(vp) != 0) 99 vprint("cd9660_reclaim: pushing active", vp); 100 /* 101 * Remove the inode from its hash chain. 102 */ 103 vfs_hash_remove(vp); 104 105 /* 106 * Purge old data structures associated with the inode. 107 */ 108 if (ip->i_mnt->im_devvp) 109 vrele(ip->i_mnt->im_devvp); 110 FREE(vp->v_data, M_ISOFSNODE); 111 vp->v_data = NULL; 112 vnode_destroy_vobject(vp); 113 return (0); 114 } 115 116 /* 117 * File attributes 118 */ 119 void 120 cd9660_defattr(isodir, inop, bp, ftype) 121 struct iso_directory_record *isodir; 122 struct iso_node *inop; 123 struct buf *bp; 124 enum ISO_FTYPE ftype; 125 { 126 struct buf *bp2 = NULL; 127 struct iso_mnt *imp; 128 struct iso_extended_attributes *ap = NULL; 129 int off; 130 131 /* high sierra does not have timezone data, flag is one byte ahead */ 132 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA? 133 &isodir->date[6]: isodir->flags)&2) { 134 inop->inode.iso_mode = S_IFDIR; 135 /* 136 * If we return 2, fts() will assume there are no subdirectories 137 * (just links for the path and .), so instead we return 1. 138 */ 139 inop->inode.iso_links = 1; 140 } else { 141 inop->inode.iso_mode = S_IFREG; 142 inop->inode.iso_links = 1; 143 } 144 if (!bp 145 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 146 && (off = isonum_711(isodir->ext_attr_length))) { 147 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 148 &bp2); 149 bp = bp2; 150 } 151 if (bp) { 152 ap = (struct iso_extended_attributes *)bp->b_data; 153 154 if (isonum_711(ap->version) == 1) { 155 if (!(ap->perm[0]&0x40)) 156 inop->inode.iso_mode |= VEXEC >> 6; 157 if (!(ap->perm[0]&0x10)) 158 inop->inode.iso_mode |= VREAD >> 6; 159 if (!(ap->perm[0]&4)) 160 inop->inode.iso_mode |= VEXEC >> 3; 161 if (!(ap->perm[0]&1)) 162 inop->inode.iso_mode |= VREAD >> 3; 163 if (!(ap->perm[1]&0x40)) 164 inop->inode.iso_mode |= VEXEC; 165 if (!(ap->perm[1]&0x10)) 166 inop->inode.iso_mode |= VREAD; 167 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */ 168 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */ 169 } else 170 ap = NULL; 171 } 172 if (!ap) { 173 inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6; 174 inop->inode.iso_uid = (uid_t)0; 175 inop->inode.iso_gid = (gid_t)0; 176 } 177 if (bp2) 178 brelse(bp2); 179 } 180 181 /* 182 * Time stamps 183 */ 184 void 185 cd9660_deftstamp(isodir,inop,bp,ftype) 186 struct iso_directory_record *isodir; 187 struct iso_node *inop; 188 struct buf *bp; 189 enum ISO_FTYPE ftype; 190 { 191 struct buf *bp2 = NULL; 192 struct iso_mnt *imp; 193 struct iso_extended_attributes *ap = NULL; 194 int off; 195 196 if (!bp 197 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 198 && (off = isonum_711(isodir->ext_attr_length))) { 199 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 200 &bp2); 201 bp = bp2; 202 } 203 if (bp) { 204 ap = (struct iso_extended_attributes *)bp->b_data; 205 206 if (ftype != ISO_FTYPE_HIGH_SIERRA 207 && isonum_711(ap->version) == 1) { 208 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime)) 209 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime); 210 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime)) 211 inop->inode.iso_ctime = inop->inode.iso_atime; 212 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime)) 213 inop->inode.iso_mtime = inop->inode.iso_ctime; 214 } else 215 ap = NULL; 216 } 217 if (!ap) { 218 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype); 219 inop->inode.iso_atime = inop->inode.iso_ctime; 220 inop->inode.iso_mtime = inop->inode.iso_ctime; 221 } 222 if (bp2) 223 brelse(bp2); 224 } 225 226 int 227 cd9660_tstamp_conv7(pi,pu,ftype) 228 u_char *pi; 229 struct timespec *pu; 230 enum ISO_FTYPE ftype; 231 { 232 int crtime, days; 233 int y, m, d, hour, minute, second, tz; 234 235 y = pi[0] + 1900; 236 m = pi[1]; 237 d = pi[2]; 238 hour = pi[3]; 239 minute = pi[4]; 240 second = pi[5]; 241 if(ftype != ISO_FTYPE_HIGH_SIERRA) 242 tz = pi[6]; 243 else 244 /* original high sierra misses timezone data */ 245 tz = 0; 246 247 if (y < 1970) { 248 pu->tv_sec = 0; 249 pu->tv_nsec = 0; 250 return 0; 251 } else { 252 #ifdef ORIGINAL 253 /* computes day number relative to Sept. 19th,1989 */ 254 /* don't even *THINK* about changing formula. It works! */ 255 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100; 256 #else 257 /* 258 * Changed :-) to make it relative to Jan. 1st, 1970 259 * and to disambiguate negative division 260 */ 261 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239; 262 #endif 263 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second; 264 265 /* timezone offset is unreliable on some disks */ 266 if (-48 <= tz && tz <= 52) 267 crtime -= tz * 15 * 60; 268 } 269 pu->tv_sec = crtime; 270 pu->tv_nsec = 0; 271 return 1; 272 } 273 274 static u_int 275 cd9660_chars2ui(begin,len) 276 u_char *begin; 277 int len; 278 { 279 u_int rc; 280 281 for (rc = 0; --len >= 0;) { 282 rc *= 10; 283 rc += *begin++ - '0'; 284 } 285 return rc; 286 } 287 288 int 289 cd9660_tstamp_conv17(pi,pu) 290 u_char *pi; 291 struct timespec *pu; 292 { 293 u_char buf[7]; 294 295 /* year:"0001"-"9999" -> -1900 */ 296 buf[0] = cd9660_chars2ui(pi,4) - 1900; 297 298 /* month: " 1"-"12" -> 1 - 12 */ 299 buf[1] = cd9660_chars2ui(pi + 4,2); 300 301 /* day: " 1"-"31" -> 1 - 31 */ 302 buf[2] = cd9660_chars2ui(pi + 6,2); 303 304 /* hour: " 0"-"23" -> 0 - 23 */ 305 buf[3] = cd9660_chars2ui(pi + 8,2); 306 307 /* minute:" 0"-"59" -> 0 - 59 */ 308 buf[4] = cd9660_chars2ui(pi + 10,2); 309 310 /* second:" 0"-"59" -> 0 - 59 */ 311 buf[5] = cd9660_chars2ui(pi + 12,2); 312 313 /* difference of GMT */ 314 buf[6] = pi[16]; 315 316 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT); 317 } 318 319 ino_t 320 isodirino(isodir, imp) 321 struct iso_directory_record *isodir; 322 struct iso_mnt *imp; 323 { 324 ino_t ino; 325 326 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) 327 << imp->im_bshift; 328 return (ino); 329 } 330