/* $NetBSD: cd9660_node.c,v 1.38 2017/05/26 14:34:19 riastradh Exp $ */ /*- * Copyright (c) 1982, 1986, 1989, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension * Support code is derived from software contributed to Berkeley * by Atsushi Murai (amurai@spec.co.jp). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cd9660_node.c 8.8 (Berkeley) 5/22/95 */ #include __KERNEL_RCSID(0, "$NetBSD: cd9660_node.c,v 1.38 2017/05/26 14:34:19 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct pool cd9660_node_pool; static u_int cd9660_chars2ui(const u_char *, int); /* * Initialize pool for nodes. */ void cd9660_init(void) { malloc_type_attach(M_ISOFSMNT); pool_init(&cd9660_node_pool, sizeof(struct iso_node), 0, 0, 0, "cd9660nopl", &pool_allocator_nointr, IPL_NONE); } /* * Reinitialize. */ void cd9660_reinit(void) { } /* * Destroy node pool. */ void cd9660_done(void) { pool_destroy(&cd9660_node_pool); malloc_type_detach(M_ISOFSMNT); } /* * Last reference to an inode, write the inode out and if necessary, * truncate and deallocate the file. */ int cd9660_inactive(void *v) { struct vop_inactive_v2_args /* { struct vnode *a_vp; bool *a_recycle; } */ *ap = v; struct vnode *vp = ap->a_vp; struct iso_node *ip = VTOI(vp); int error = 0; /* * If we are done with the inode, reclaim it * so that it can be reused immediately. */ ip->i_flag = 0; *ap->a_recycle = (ip->inode.iso_mode == 0); return error; } /* * Reclaim an inode so that it can be used for other purposes. */ int cd9660_reclaim(void *v) { struct vop_reclaim_v2_args /* { struct vnode *a_vp; struct lwp *a_l; } */ *ap = v; struct vnode *vp = ap->a_vp; VOP_UNLOCK(vp); /* * Purge old data structures associated with the inode. */ genfs_node_destroy(vp); pool_put(&cd9660_node_pool, vp->v_data); vp->v_data = NULL; return (0); } /* * File attributes */ void cd9660_defattr(struct iso_directory_record *isodir, struct iso_node *inop, struct buf *bp) { struct buf *bp2 = NULL; struct iso_mnt *imp; struct iso_extended_attributes *ap = NULL; int off; if (isonum_711(isodir->flags)&2) { inop->inode.iso_mode = S_IFDIR; /* * If we return 2, fts() will assume there are no subdirectories * (just links for the path and .), so instead we return 1. */ inop->inode.iso_links = 1; } else { inop->inode.iso_mode = S_IFREG; inop->inode.iso_links = 1; } if (!bp && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) && (off = isonum_711(isodir->ext_attr_length))) { cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, &bp2); bp = bp2; } if (bp) { ap = (struct iso_extended_attributes *)bp->b_data; if (isonum_711(ap->version) == 1) { if (!(ap->perm[1]&0x10)) inop->inode.iso_mode |= S_IRUSR; if (!(ap->perm[1]&0x40)) inop->inode.iso_mode |= S_IXUSR; if (!(ap->perm[0]&0x01)) inop->inode.iso_mode |= S_IRGRP; if (!(ap->perm[0]&0x04)) inop->inode.iso_mode |= S_IXGRP; if (!(ap->perm[0]&0x10)) inop->inode.iso_mode |= S_IROTH; if (!(ap->perm[0]&0x40)) inop->inode.iso_mode |= S_IXOTH; inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */ inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */ } else ap = NULL; } if (!ap) { inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; inop->inode.iso_uid = (uid_t)0; inop->inode.iso_gid = (gid_t)0; } if (bp2) brelse(bp2, 0); } /* * Time stamps */ void cd9660_deftstamp(struct iso_directory_record *isodir, struct iso_node *inop, struct buf *bp) { struct buf *bp2 = NULL; struct iso_mnt *imp; struct iso_extended_attributes *ap = NULL; int off; if (!bp && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT) && (off = isonum_711(isodir->ext_attr_length))) { cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, &bp2); bp = bp2; } if (bp) { ap = (struct iso_extended_attributes *)bp->b_data; if (isonum_711(ap->version) == 1) { if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime)) cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime); if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime)) inop->inode.iso_ctime = inop->inode.iso_atime; if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime)) inop->inode.iso_mtime = inop->inode.iso_ctime; } else ap = NULL; } if (!ap) { cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime); inop->inode.iso_atime = inop->inode.iso_ctime; inop->inode.iso_mtime = inop->inode.iso_ctime; } if (bp2) brelse(bp2, 0); } int cd9660_tstamp_conv7(const u_char *pi, struct timespec *pu) { int crtime, days; int y, m, d, hour, minute, second, tz; y = pi[0] + 1900; m = pi[1]; d = pi[2]; hour = pi[3]; minute = pi[4]; second = pi[5]; tz = pi[6]; if (y < 1970) { pu->tv_sec = 0; pu->tv_nsec = 0; return 0; } else { #ifdef ORIGINAL /* computes day number relative to Sept. 19th,1989 */ /* don't even *THINK* about changing formula. It works! */ days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100; #else /* * Changed :-) to make it relative to Jan. 1st, 1970 * and to disambiguate negative division */ days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239; #endif crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second; /* timezone offset is unreliable on some disks */ if (-48 <= tz && tz <= 52) crtime -= tz * 15 * 60; } pu->tv_sec = crtime; pu->tv_nsec = 0; return 1; } static u_int cd9660_chars2ui(const u_char *begin, int len) { u_int rc; for (rc = 0; --len >= 0;) { rc *= 10; rc += *begin++ - '0'; } return rc; } int cd9660_tstamp_conv17(const u_char *pi, struct timespec *pu) { u_char tbuf[7]; /* year:"0001"-"9999" -> -1900 */ tbuf[0] = cd9660_chars2ui(pi,4) - 1900; /* month: " 1"-"12" -> 1 - 12 */ tbuf[1] = cd9660_chars2ui(pi + 4,2); /* day: " 1"-"31" -> 1 - 31 */ tbuf[2] = cd9660_chars2ui(pi + 6,2); /* hour: " 0"-"23" -> 0 - 23 */ tbuf[3] = cd9660_chars2ui(pi + 8,2); /* minute:" 0"-"59" -> 0 - 59 */ tbuf[4] = cd9660_chars2ui(pi + 10,2); /* second:" 0"-"59" -> 0 - 59 */ tbuf[5] = cd9660_chars2ui(pi + 12,2); /* difference of GMT */ tbuf[6] = pi[16]; return cd9660_tstamp_conv7(tbuf,pu); } ino_t isodirino(struct iso_directory_record *isodir, struct iso_mnt *imp) { ino_t ino; /* * Note there is an inverse calculation in * cd9660_vfsops.c:cd9660_loadvnode(): * ip->iso_start = ino >> imp->im_bshift; * and also a calculation of the isodir pointer * from an inode in cd9660_vnops.c:cd9660_readlink() */ ino = ((ino_t)isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) << imp->im_bshift; return ino; }