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 /* 73 * If we are done with the inode, reclaim it 74 * so that it can be reused immediately. 75 */ 76 if (ip->inode.iso_mode == 0) 77 vrecycle(vp, td); 78 return error; 79 } 80 81 /* 82 * Reclaim an inode so that it can be used for other purposes. 83 */ 84 int 85 cd9660_reclaim(ap) 86 struct vop_reclaim_args /* { 87 struct vnode *a_vp; 88 struct thread *a_td; 89 } */ *ap; 90 { 91 struct vnode *vp = ap->a_vp; 92 93 /* 94 * Destroy the vm object and flush associated pages. 95 */ 96 vnode_destroy_vobject(vp); 97 /* 98 * Remove the inode from its hash chain. 99 */ 100 vfs_hash_remove(vp); 101 102 /* 103 * Purge old data structures associated with the inode. 104 */ 105 free(vp->v_data, M_ISOFSNODE); 106 vp->v_data = NULL; 107 return (0); 108 } 109 110 /* 111 * File attributes 112 */ 113 void 114 cd9660_defattr(isodir, inop, bp, ftype) 115 struct iso_directory_record *isodir; 116 struct iso_node *inop; 117 struct buf *bp; 118 enum ISO_FTYPE ftype; 119 { 120 struct buf *bp2 = NULL; 121 struct iso_mnt *imp; 122 struct iso_extended_attributes *ap = NULL; 123 int off; 124 125 /* high sierra does not have timezone data, flag is one byte ahead */ 126 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA? 127 &isodir->date[6]: isodir->flags)&2) { 128 inop->inode.iso_mode = S_IFDIR; 129 /* 130 * If we return 2, fts() will assume there are no subdirectories 131 * (just links for the path and .), so instead we return 1. 132 */ 133 inop->inode.iso_links = 1; 134 } else { 135 inop->inode.iso_mode = S_IFREG; 136 inop->inode.iso_links = 1; 137 } 138 if (!bp 139 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 140 && (off = isonum_711(isodir->ext_attr_length))) { 141 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 142 &bp2); 143 bp = bp2; 144 } 145 if (bp) { 146 ap = (struct iso_extended_attributes *)bp->b_data; 147 148 if (isonum_711(ap->version) == 1) { 149 if (!(ap->perm[0]&0x40)) 150 inop->inode.iso_mode |= S_IXOTH; 151 if (!(ap->perm[0]&0x10)) 152 inop->inode.iso_mode |= S_IROTH; 153 if (!(ap->perm[0]&4)) 154 inop->inode.iso_mode |= S_IXGRP; 155 if (!(ap->perm[0]&1)) 156 inop->inode.iso_mode |= S_IRGRP; 157 if (!(ap->perm[1]&0x40)) 158 inop->inode.iso_mode |= S_IXUSR; 159 if (!(ap->perm[1]&0x10)) 160 inop->inode.iso_mode |= S_IRUSR; 161 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */ 162 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */ 163 } else 164 ap = NULL; 165 } 166 if (!ap) { 167 inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 168 inop->inode.iso_uid = (uid_t)0; 169 inop->inode.iso_gid = (gid_t)0; 170 } 171 if (bp2) 172 brelse(bp2); 173 } 174 175 /* 176 * Time stamps 177 */ 178 void 179 cd9660_deftstamp(isodir,inop,bp,ftype) 180 struct iso_directory_record *isodir; 181 struct iso_node *inop; 182 struct buf *bp; 183 enum ISO_FTYPE ftype; 184 { 185 struct buf *bp2 = NULL; 186 struct iso_mnt *imp; 187 struct iso_extended_attributes *ap = NULL; 188 int off; 189 190 if (!bp 191 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) 192 && (off = isonum_711(isodir->ext_attr_length))) { 193 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, 194 &bp2); 195 bp = bp2; 196 } 197 if (bp) { 198 ap = (struct iso_extended_attributes *)bp->b_data; 199 200 if (ftype != ISO_FTYPE_HIGH_SIERRA 201 && isonum_711(ap->version) == 1) { 202 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime)) 203 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime); 204 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime)) 205 inop->inode.iso_ctime = inop->inode.iso_atime; 206 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime)) 207 inop->inode.iso_mtime = inop->inode.iso_ctime; 208 } else 209 ap = NULL; 210 } 211 if (!ap) { 212 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype); 213 inop->inode.iso_atime = inop->inode.iso_ctime; 214 inop->inode.iso_mtime = inop->inode.iso_ctime; 215 } 216 if (bp2) 217 brelse(bp2); 218 } 219 220 int 221 cd9660_tstamp_conv7(pi,pu,ftype) 222 u_char *pi; 223 struct timespec *pu; 224 enum ISO_FTYPE ftype; 225 { 226 int crtime, days; 227 int y, m, d, hour, minute, second, tz; 228 229 y = pi[0] + 1900; 230 m = pi[1]; 231 d = pi[2]; 232 hour = pi[3]; 233 minute = pi[4]; 234 second = pi[5]; 235 if(ftype != ISO_FTYPE_HIGH_SIERRA) 236 tz = ((signed char *)pi)[6]; /* Timezone value is signed. */ 237 else 238 /* original high sierra misses timezone data */ 239 tz = 0; 240 241 if (y < 1970) { 242 pu->tv_sec = 0; 243 pu->tv_nsec = 0; 244 return 0; 245 } else { 246 #ifdef ORIGINAL 247 /* computes day number relative to Sept. 19th,1989 */ 248 /* don't even *THINK* about changing formula. It works! */ 249 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100; 250 #else 251 /* 252 * Changed :-) to make it relative to Jan. 1st, 1970 253 * and to disambiguate negative division 254 */ 255 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239; 256 #endif 257 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second; 258 259 /* timezone offset is unreliable on some disks */ 260 if (-48 <= tz && tz <= 52) 261 crtime -= tz * 15 * 60; 262 } 263 pu->tv_sec = crtime; 264 pu->tv_nsec = 0; 265 return 1; 266 } 267 268 static u_int 269 cd9660_chars2ui(begin,len) 270 u_char *begin; 271 int len; 272 { 273 u_int rc; 274 275 for (rc = 0; --len >= 0;) { 276 rc *= 10; 277 rc += *begin++ - '0'; 278 } 279 return rc; 280 } 281 282 int 283 cd9660_tstamp_conv17(pi,pu) 284 u_char *pi; 285 struct timespec *pu; 286 { 287 u_char buf[7]; 288 289 /* year:"0001"-"9999" -> -1900 */ 290 buf[0] = cd9660_chars2ui(pi,4) - 1900; 291 292 /* month: " 1"-"12" -> 1 - 12 */ 293 buf[1] = cd9660_chars2ui(pi + 4,2); 294 295 /* day: " 1"-"31" -> 1 - 31 */ 296 buf[2] = cd9660_chars2ui(pi + 6,2); 297 298 /* hour: " 0"-"23" -> 0 - 23 */ 299 buf[3] = cd9660_chars2ui(pi + 8,2); 300 301 /* minute:" 0"-"59" -> 0 - 59 */ 302 buf[4] = cd9660_chars2ui(pi + 10,2); 303 304 /* second:" 0"-"59" -> 0 - 59 */ 305 buf[5] = cd9660_chars2ui(pi + 12,2); 306 307 /* difference of GMT */ 308 buf[6] = pi[16]; 309 310 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT); 311 } 312 313 ino_t 314 isodirino(isodir, imp) 315 struct iso_directory_record *isodir; 316 struct iso_mnt *imp; 317 { 318 ino_t ino; 319 320 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) 321 << imp->im_bshift; 322 return (ino); 323 } 324