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 <fs/cd9660/iso.h> 51 #include <fs/cd9660/cd9660_node.h> 52 #include <fs/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 /* 76 * If we are done with the inode, reclaim it 77 * so that it can be reused immediately. 78 */ 79 if (ip->inode.iso_mode == 0) 80 vrecycle(vp, td); 81 return error; 82 } 83 84 /* 85 * Reclaim an inode so that it can be used for other purposes. 86 */ 87 int 88 cd9660_reclaim(ap) 89 struct vop_reclaim_args /* { 90 struct vnode *a_vp; 91 struct thread *a_td; 92 } */ *ap; 93 { 94 struct vnode *vp = ap->a_vp; 95 96 if (prtactive && vrefcnt(vp) != 0) 97 vprint("cd9660_reclaim: pushing active", vp); 98 /* 99 * Destroy the vm object and flush associated pages. 100 */ 101 vnode_destroy_vobject(vp); 102 /* 103 * Remove the inode from its hash chain. 104 */ 105 vfs_hash_remove(vp); 106 107 /* 108 * Purge old data structures associated with the inode. 109 */ 110 free(vp->v_data, M_ISOFSNODE); 111 vp->v_data = NULL; 112 return (0); 113 } 114 115 /* 116 * File attributes 117 */ 118 void 119 cd9660_defattr(isodir, inop, bp, ftype) 120 struct iso_directory_record *isodir; 121 struct iso_node *inop; 122 struct buf *bp; 123 enum ISO_FTYPE ftype; 124 { 125 struct buf *bp2 = NULL; 126 struct iso_mnt *imp; 127 struct iso_extended_attributes *ap = NULL; 128 int off; 129 130 /* high sierra does not have timezone data, flag is one byte ahead */ 131 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA? 132 &isodir->date[6]: isodir->flags)&2) { 133 inop->inode.iso_mode = S_IFDIR; 134 /* 135 * If we return 2, fts() will assume there are no subdirectories 136 * (just links for the path and .), so instead we return 1. 137 */ 138 inop->inode.iso_links = 1; 139 } else { 140 inop->inode.iso_mode = S_IFREG; 141 inop->inode.iso_links = 1; 142 } 143 if (!bp 144 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 145 && (off = isonum_711(isodir->ext_attr_length))) { 146 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 147 &bp2); 148 bp = bp2; 149 } 150 if (bp) { 151 ap = (struct iso_extended_attributes *)bp->b_data; 152 153 if (isonum_711(ap->version) == 1) { 154 if (!(ap->perm[0]&0x40)) 155 inop->inode.iso_mode |= S_IXOTH; 156 if (!(ap->perm[0]&0x10)) 157 inop->inode.iso_mode |= S_IROTH; 158 if (!(ap->perm[0]&4)) 159 inop->inode.iso_mode |= S_IXGRP; 160 if (!(ap->perm[0]&1)) 161 inop->inode.iso_mode |= S_IRGRP; 162 if (!(ap->perm[1]&0x40)) 163 inop->inode.iso_mode |= S_IXUSR; 164 if (!(ap->perm[1]&0x10)) 165 inop->inode.iso_mode |= S_IRUSR; 166 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */ 167 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */ 168 } else 169 ap = NULL; 170 } 171 if (!ap) { 172 inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 173 inop->inode.iso_uid = (uid_t)0; 174 inop->inode.iso_gid = (gid_t)0; 175 } 176 if (bp2) 177 brelse(bp2); 178 } 179 180 /* 181 * Time stamps 182 */ 183 void 184 cd9660_deftstamp(isodir,inop,bp,ftype) 185 struct iso_directory_record *isodir; 186 struct iso_node *inop; 187 struct buf *bp; 188 enum ISO_FTYPE ftype; 189 { 190 struct buf *bp2 = NULL; 191 struct iso_mnt *imp; 192 struct iso_extended_attributes *ap = NULL; 193 int off; 194 195 if (!bp 196 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 197 && (off = isonum_711(isodir->ext_attr_length))) { 198 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 199 &bp2); 200 bp = bp2; 201 } 202 if (bp) { 203 ap = (struct iso_extended_attributes *)bp->b_data; 204 205 if (ftype != ISO_FTYPE_HIGH_SIERRA 206 && isonum_711(ap->version) == 1) { 207 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime)) 208 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime); 209 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime)) 210 inop->inode.iso_ctime = inop->inode.iso_atime; 211 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime)) 212 inop->inode.iso_mtime = inop->inode.iso_ctime; 213 } else 214 ap = NULL; 215 } 216 if (!ap) { 217 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype); 218 inop->inode.iso_atime = inop->inode.iso_ctime; 219 inop->inode.iso_mtime = inop->inode.iso_ctime; 220 } 221 if (bp2) 222 brelse(bp2); 223 } 224 225 int 226 cd9660_tstamp_conv7(pi,pu,ftype) 227 u_char *pi; 228 struct timespec *pu; 229 enum ISO_FTYPE ftype; 230 { 231 int crtime, days; 232 int y, m, d, hour, minute, second, tz; 233 234 y = pi[0] + 1900; 235 m = pi[1]; 236 d = pi[2]; 237 hour = pi[3]; 238 minute = pi[4]; 239 second = pi[5]; 240 if(ftype != ISO_FTYPE_HIGH_SIERRA) 241 tz = ((signed char *)pi)[6]; /* Timezone value is signed. */ 242 else 243 /* original high sierra misses timezone data */ 244 tz = 0; 245 246 if (y < 1970) { 247 pu->tv_sec = 0; 248 pu->tv_nsec = 0; 249 return 0; 250 } else { 251 #ifdef ORIGINAL 252 /* computes day number relative to Sept. 19th,1989 */ 253 /* don't even *THINK* about changing formula. It works! */ 254 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100; 255 #else 256 /* 257 * Changed :-) to make it relative to Jan. 1st, 1970 258 * and to disambiguate negative division 259 */ 260 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239; 261 #endif 262 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second; 263 264 /* timezone offset is unreliable on some disks */ 265 if (-48 <= tz && tz <= 52) 266 crtime -= tz * 15 * 60; 267 } 268 pu->tv_sec = crtime; 269 pu->tv_nsec = 0; 270 return 1; 271 } 272 273 static u_int 274 cd9660_chars2ui(begin,len) 275 u_char *begin; 276 int len; 277 { 278 u_int rc; 279 280 for (rc = 0; --len >= 0;) { 281 rc *= 10; 282 rc += *begin++ - '0'; 283 } 284 return rc; 285 } 286 287 int 288 cd9660_tstamp_conv17(pi,pu) 289 u_char *pi; 290 struct timespec *pu; 291 { 292 u_char buf[7]; 293 294 /* year:"0001"-"9999" -> -1900 */ 295 buf[0] = cd9660_chars2ui(pi,4) - 1900; 296 297 /* month: " 1"-"12" -> 1 - 12 */ 298 buf[1] = cd9660_chars2ui(pi + 4,2); 299 300 /* day: " 1"-"31" -> 1 - 31 */ 301 buf[2] = cd9660_chars2ui(pi + 6,2); 302 303 /* hour: " 0"-"23" -> 0 - 23 */ 304 buf[3] = cd9660_chars2ui(pi + 8,2); 305 306 /* minute:" 0"-"59" -> 0 - 59 */ 307 buf[4] = cd9660_chars2ui(pi + 10,2); 308 309 /* second:" 0"-"59" -> 0 - 59 */ 310 buf[5] = cd9660_chars2ui(pi + 12,2); 311 312 /* difference of GMT */ 313 buf[6] = pi[16]; 314 315 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT); 316 } 317 318 ino_t 319 isodirino(isodir, imp) 320 struct iso_directory_record *isodir; 321 struct iso_mnt *imp; 322 { 323 ino_t ino; 324 325 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) 326 << imp->im_bshift; 327 return (ino); 328 } 329