/* * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $NetBSD: cd9660_node.c,v 1.13 1994/12/24 15:30:07 cgd 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 8.5 (Berkeley) 12/5/94 * HISTORY * 22-Jan-98 radar 1669467 - ISO 9660 CD support - jwc * 17-Feb-98 radar 1669467 - changed lock protocols to use the lock manager - chw */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Structures associated with iso_node caching. */ struct iso_node **isohashtbl; u_long isohash; #define INOHASH(device, inum) (((device) + ((inum)>>12)) & isohash) #ifdef ISODEVMAP struct iso_node **idvhashtbl; u_long idvhash; #define DNOHASH(device, inum) (((device) + ((inum)>>12)) & idvhash) #endif /* defined in bsd/vfs/vfs_subr.c */ extern int prtactive; /* 1 => print out reclaim of active vnodes */ extern u_char isonullname[]; /* * Initialize hash links for inodes and dnodes. */ int cd9660_init(__unused struct vfsconf *cp) { return 0; } int cd9660_hashinit(void) { if (!isohashtbl) isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash); #ifdef ISODEVMAP if (!idvhashtbl) idvhashtbl = hashinit(desiredvnodes / 8, M_ISOFSMNT, &idvhash); #endif return 0; } #ifdef ISODEVMAP /* * Enter a new node into the device hash list */ struct iso_dnode * iso_dmap(dev_t device, ino_t inum, int create) { register struct iso_dnode **dpp, *dp, *dq; dpp = &idvhashtbl[DNOHASH(device, inum)]; for (dp = *dpp;; dp = dp->d_next) { if (dp == NULL) return (NULL); if (inum == dp->i_number && device == dp->i_dev) return (dp); if (!create) return (NULL); MALLOC(dp, struct iso_dnode *, sizeof(struct iso_dnode), M_CACHE, M_WAITOK); dp->i_dev = dev; dp->i_number = ino; if (dq = *dpp) dq->d_prev = dp->d_next; dp->d_next = dq; dp->d_prev = dpp; *dpp = dp; return (dp); } void iso_dunmap(dev_t device) { struct iso_dnode **dpp, *dp, *dq; for (dpp = idvhashtbl; dpp <= idvhashtbl + idvhash; dpp++) { for (dp = *dpp; dp != NULL; dp = dq) dq = dp->d_next; if (device == dp->i_dev) { if (dq) dq->d_prev = dp->d_prev; *dp->d_prev = dq; FREE(dp, M_CACHE); } } } } #endif /* * Use the device/inum pair to find the incore inode, and return a pointer * to it. If it is in core, but locked, wait for it. */ struct vnode * cd9660_ihashget(dev_t device, ino_t inum, __unused struct proc *p) { register struct iso_node *ip; struct vnode *vp; uint32_t vid; retry: for (ip = isohashtbl[INOHASH(device, inum)]; ip; ip = ip->i_next) { if (inum == ip->i_number && device == ip->i_dev) { if (ISSET(ip->i_flag, ISO_INALLOC)) { /* * inode is being created... wait for it * to be ready for consumption */ SET(ip->i_flag, ISO_INWALLOC); tsleep((caddr_t)ip, PINOD, "cd9960_ihashget", 0); goto retry; } vp = ITOV(ip); /* * the vid needs to be grabbed before we drop * lock protecting the hash */ vid = vnode_vid(vp); /* * we currently depend on running under the FS funnel * when we do proper locking and advertise ourselves * as thread safe, we'll need a lock to protect the * hash lookup... this is where we would drop it */ if (vnode_getwithvid(vp, vid)) { /* * If vnode is being reclaimed, or has * already changed identity, no need to wait */ return (NULL); } return (vp); } } return (NULL); } /* * Insert the inode into the hash table, and return it locked. */ void cd9660_ihashins(struct iso_node *ip) { struct iso_node **ipp, *iq; /* lock the inode, then put it on the appropriate hash list */ ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)]; if ((iq = *ipp)) iq->i_prev = &ip->i_next; ip->i_next = iq; ip->i_prev = ipp; *ipp = ip; } /* * Remove the inode from the hash table. */ void cd9660_ihashrem(register struct iso_node *ip) { register struct iso_node *iq; if ((iq = ip->i_next)) iq->i_prev = ip->i_prev; *ip->i_prev = iq; #if 1 /* was ifdef DIAGNOSTIC */ ip->i_next = NULL; ip->i_prev = NULL; #endif } /* * Last reference to an inode... if we're done with * it, go ahead and recycle it for other use */ int cd9660_inactive(struct vnop_inactive_args *ap) { vnode_t vp = ap->a_vp; struct iso_node *ip = VTOI(vp); /* * If we are done with the inode, reclaim it * so that it can be reused immediately. */ if (ip->inode.iso_mode == 0) vnode_recycle(vp); return 0; } /* * Reclaim an inode so that it can be used for other purposes. */ int cd9660_reclaim(struct vnop_reclaim_args *ap) { vnode_t vp = ap->a_vp; struct iso_node *ip = VTOI(vp); vnode_removefsref(vp); /* * Remove the inode from its hash chain. */ cd9660_ihashrem(ip); if (ip->i_devvp) { vnode_t devvp = ip->i_devvp; ip->i_devvp = NULL; vnode_rele(devvp); } vnode_clearfsnode(vp); if (ip->i_namep != isonullname) FREE(ip->i_namep, M_TEMP); if (ip->i_riff != NULL) FREE(ip->i_riff, M_TEMP); FREE_ZONE(ip, sizeof(struct iso_node), M_ISOFSNODE); 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) & directoryBit ) { 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 *)((char *)0 + buf_dataptr(bp)); if (isonum_711(ap->version) == 1) { if (!(ap->perm[0]&0x40)) inop->inode.iso_mode |= VEXEC >> 6; if (!(ap->perm[0]&0x10)) inop->inode.iso_mode |= VREAD >> 6; if (!(ap->perm[0]&4)) inop->inode.iso_mode |= VEXEC >> 3; if (!(ap->perm[0]&1)) inop->inode.iso_mode |= VREAD >> 3; if (!(ap->perm[1]&0x40)) inop->inode.iso_mode |= VEXEC; if (!(ap->perm[1]&0x10)) inop->inode.iso_mode |= VREAD; 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 |= VREAD|VWRITE|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6; inop->inode.iso_uid = ISO_UNKNOWNUID; inop->inode.iso_gid = ISO_UNKNOWNGID; } if (bp2) buf_brelse(bp2); } /* * 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 *)((char *)0 + buf_dataptr(bp)); 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) buf_brelse(bp2); } int cd9660_tstamp_conv7(u_char *pi, struct timespec *pu) { int crtime, days; int y, m, d, hour, minute, second, mytz; y = pi[0] + 1900; m = pi[1]; d = pi[2]; hour = pi[3]; minute = pi[4]; second = pi[5]; mytz = 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 <= mytz && mytz <= 52) crtime -= mytz * 15 * 60; } pu->tv_sec = crtime; pu->tv_nsec = 0; return 1; } static u_int cd9660_chars2ui(u_char *begin, int len) { u_int rc; for (rc = 0; --len >= 0;) { rc *= 10; rc += *begin++ - '0'; } return rc; } int cd9660_tstamp_conv17(u_char *pi, struct timespec *pu) { u_char buf[7]; /* year:"0001"-"9999" -> -1900 */ buf[0] = cd9660_chars2ui(pi,4) - 1900; /* month: " 1"-"12" -> 1 - 12 */ buf[1] = cd9660_chars2ui(pi + 4,2); /* day: " 1"-"31" -> 1 - 31 */ buf[2] = cd9660_chars2ui(pi + 6,2); /* hour: " 0"-"23" -> 0 - 23 */ buf[3] = cd9660_chars2ui(pi + 8,2); /* minute:" 0"-"59" -> 0 - 59 */ buf[4] = cd9660_chars2ui(pi + 10,2); /* second:" 0"-"59" -> 0 - 59 */ buf[5] = cd9660_chars2ui(pi + 12,2); /* difference of GMT */ buf[6] = pi[16]; return cd9660_tstamp_conv7(buf,pu); } ino_t isodirino(struct iso_directory_record *isodir, struct iso_mnt *imp) { ino_t ino; ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length)) << imp->im_bshift; return (ino); }