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 struct iso_node *ip = VTOI(vp); 96 97 if (prtactive && vrefcnt(vp) != 0) 98 vprint("cd9660_reclaim: pushing active", vp); 99 /* 100 * Destroy the vm object and flush associated pages. 101 */ 102 vnode_destroy_vobject(vp); 103 /* 104 * Remove the inode from its hash chain. 105 */ 106 vfs_hash_remove(vp); 107 108 /* 109 * Purge old data structures associated with the inode. 110 */ 111 if (ip->i_mnt->im_devvp) 112 vrele(ip->i_mnt->im_devvp); 113 free(vp->v_data, M_ISOFSNODE); 114 vp->v_data = NULL; 115 return (0); 116 } 117 118 /* 119 * File attributes 120 */ 121 void 122 cd9660_defattr(isodir, inop, bp, ftype) 123 struct iso_directory_record *isodir; 124 struct iso_node *inop; 125 struct buf *bp; 126 enum ISO_FTYPE ftype; 127 { 128 struct buf *bp2 = NULL; 129 struct iso_mnt *imp; 130 struct iso_extended_attributes *ap = NULL; 131 int off; 132 133 /* high sierra does not have timezone data, flag is one byte ahead */ 134 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA? 135 &isodir->date[6]: isodir->flags)&2) { 136 inop->inode.iso_mode = S_IFDIR; 137 /* 138 * If we return 2, fts() will assume there are no subdirectories 139 * (just links for the path and .), so instead we return 1. 140 */ 141 inop->inode.iso_links = 1; 142 } else { 143 inop->inode.iso_mode = S_IFREG; 144 inop->inode.iso_links = 1; 145 } 146 if (!bp 147 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 148 && (off = isonum_711(isodir->ext_attr_length))) { 149 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 150 &bp2); 151 bp = bp2; 152 } 153 if (bp) { 154 ap = (struct iso_extended_attributes *)bp->b_data; 155 156 if (isonum_711(ap->version) == 1) { 157 if (!(ap->perm[0]&0x40)) 158 inop->inode.iso_mode |= S_IXOTH; 159 if (!(ap->perm[0]&0x10)) 160 inop->inode.iso_mode |= S_IROTH; 161 if (!(ap->perm[0]&4)) 162 inop->inode.iso_mode |= S_IXGRP; 163 if (!(ap->perm[0]&1)) 164 inop->inode.iso_mode |= S_IRGRP; 165 if (!(ap->perm[1]&0x40)) 166 inop->inode.iso_mode |= S_IXUSR; 167 if (!(ap->perm[1]&0x10)) 168 inop->inode.iso_mode |= S_IRUSR; 169 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */ 170 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */ 171 } else 172 ap = NULL; 173 } 174 if (!ap) { 175 inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 176 inop->inode.iso_uid = (uid_t)0; 177 inop->inode.iso_gid = (gid_t)0; 178 } 179 if (bp2) 180 brelse(bp2); 181 } 182 183 /* 184 * Time stamps 185 */ 186 void 187 cd9660_deftstamp(isodir,inop,bp,ftype) 188 struct iso_directory_record *isodir; 189 struct iso_node *inop; 190 struct buf *bp; 191 enum ISO_FTYPE ftype; 192 { 193 struct buf *bp2 = NULL; 194 struct iso_mnt *imp; 195 struct iso_extended_attributes *ap = NULL; 196 int off; 197 198 if (!bp 199 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 200 && (off = isonum_711(isodir->ext_attr_length))) { 201 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 202 &bp2); 203 bp = bp2; 204 } 205 if (bp) { 206 ap = (struct iso_extended_attributes *)bp->b_data; 207 208 if (ftype != ISO_FTYPE_HIGH_SIERRA 209 && isonum_711(ap->version) == 1) { 210 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime)) 211 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime); 212 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime)) 213 inop->inode.iso_ctime = inop->inode.iso_atime; 214 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime)) 215 inop->inode.iso_mtime = inop->inode.iso_ctime; 216 } else 217 ap = NULL; 218 } 219 if (!ap) { 220 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype); 221 inop->inode.iso_atime = inop->inode.iso_ctime; 222 inop->inode.iso_mtime = inop->inode.iso_ctime; 223 } 224 if (bp2) 225 brelse(bp2); 226 } 227 228 int 229 cd9660_tstamp_conv7(pi,pu,ftype) 230 u_char *pi; 231 struct timespec *pu; 232 enum ISO_FTYPE ftype; 233 { 234 int crtime, days; 235 int y, m, d, hour, minute, second, tz; 236 237 y = pi[0] + 1900; 238 m = pi[1]; 239 d = pi[2]; 240 hour = pi[3]; 241 minute = pi[4]; 242 second = pi[5]; 243 if(ftype != ISO_FTYPE_HIGH_SIERRA) 244 tz = ((signed char *)pi)[6]; /* Timezone value is signed. */ 245 else 246 /* original high sierra misses timezone data */ 247 tz = 0; 248 249 if (y < 1970) { 250 pu->tv_sec = 0; 251 pu->tv_nsec = 0; 252 return 0; 253 } else { 254 #ifdef ORIGINAL 255 /* computes day number relative to Sept. 19th,1989 */ 256 /* don't even *THINK* about changing formula. It works! */ 257 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100; 258 #else 259 /* 260 * Changed :-) to make it relative to Jan. 1st, 1970 261 * and to disambiguate negative division 262 */ 263 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239; 264 #endif 265 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second; 266 267 /* timezone offset is unreliable on some disks */ 268 if (-48 <= tz && tz <= 52) 269 crtime -= tz * 15 * 60; 270 } 271 pu->tv_sec = crtime; 272 pu->tv_nsec = 0; 273 return 1; 274 } 275 276 static u_int 277 cd9660_chars2ui(begin,len) 278 u_char *begin; 279 int len; 280 { 281 u_int rc; 282 283 for (rc = 0; --len >= 0;) { 284 rc *= 10; 285 rc += *begin++ - '0'; 286 } 287 return rc; 288 } 289 290 int 291 cd9660_tstamp_conv17(pi,pu) 292 u_char *pi; 293 struct timespec *pu; 294 { 295 u_char buf[7]; 296 297 /* year:"0001"-"9999" -> -1900 */ 298 buf[0] = cd9660_chars2ui(pi,4) - 1900; 299 300 /* month: " 1"-"12" -> 1 - 12 */ 301 buf[1] = cd9660_chars2ui(pi + 4,2); 302 303 /* day: " 1"-"31" -> 1 - 31 */ 304 buf[2] = cd9660_chars2ui(pi + 6,2); 305 306 /* hour: " 0"-"23" -> 0 - 23 */ 307 buf[3] = cd9660_chars2ui(pi + 8,2); 308 309 /* minute:" 0"-"59" -> 0 - 59 */ 310 buf[4] = cd9660_chars2ui(pi + 10,2); 311 312 /* second:" 0"-"59" -> 0 - 59 */ 313 buf[5] = cd9660_chars2ui(pi + 12,2); 314 315 /* difference of GMT */ 316 buf[6] = pi[16]; 317 318 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT); 319 } 320 321 ino_t 322 isodirino(isodir, imp) 323 struct iso_directory_record *isodir; 324 struct iso_mnt *imp; 325 { 326 ino_t ino; 327 328 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) 329 << imp->im_bshift; 330 return (ino); 331 } 332