diff options
Diffstat (limited to 'sys/fs/cd9660/cd9660_node.c')
| -rw-r--r-- | sys/fs/cd9660/cd9660_node.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/sys/fs/cd9660/cd9660_node.c b/sys/fs/cd9660/cd9660_node.c new file mode 100644 index 0000000..d7093fe --- /dev/null +++ b/sys/fs/cd9660/cd9660_node.c @@ -0,0 +1,428 @@ +/*- + * Copyright (c) 1982, 1986, 1989, 1994, 1995 + * 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 8.2 (Berkeley) 1/23/94 + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mount.h> +#include <sys/proc.h> +#include <sys/buf.h> +#include <sys/vnode.h> +#include <sys/malloc.h> +#include <sys/stat.h> + +#include <isofs/cd9660/iso.h> +#include <isofs/cd9660/cd9660_node.h> +#include <isofs/cd9660/cd9660_mount.h> + +/* + * Structures associated with iso_node caching. + */ +static struct iso_node **isohashtbl; +static u_long isohash; +#define INOHASH(device, inum) ((minor(device) + ((inum)>>12)) & isohash) +#ifndef NULL_SIMPLELOCKS +static struct simplelock cd9660_ihash_slock; +#endif + +static void cd9660_ihashrem __P((struct iso_node *)); +static unsigned cd9660_chars2ui __P((unsigned char *begin, int len)); + +/* + * Initialize hash links for inodes and dnodes. + */ +int +cd9660_init(vfsp) + struct vfsconf *vfsp; +{ + + isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash); + simple_lock_init(&cd9660_ihash_slock); + return (0); +} + + +/* + * 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, inum) + dev_t dev; + ino_t inum; +{ + struct proc *p = curproc; /* XXX */ + struct iso_node *ip; + struct vnode *vp; + +loop: + simple_lock(&cd9660_ihash_slock); + for (ip = isohashtbl[INOHASH(dev, inum)]; ip; ip = ip->i_next) { + if (inum == ip->i_number && dev == ip->i_dev) { + vp = ITOV(ip); + simple_lock(&vp->v_interlock); + simple_unlock(&cd9660_ihash_slock); + if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p)) + goto loop; + return (vp); + } + } + simple_unlock(&cd9660_ihash_slock); + return (NULL); +} + +/* + * Insert the inode into the hash table, and return it locked. + */ +void +cd9660_ihashins(ip) + struct iso_node *ip; +{ + struct proc *p = curproc; /* XXX */ + struct iso_node **ipp, *iq; + + simple_lock(&cd9660_ihash_slock); + ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)]; + if ((iq = *ipp) != NULL) + iq->i_prev = &ip->i_next; + ip->i_next = iq; + ip->i_prev = ipp; + *ipp = ip; + simple_unlock(&cd9660_ihash_slock); + + lockmgr(&ip->i_lock, LK_EXCLUSIVE, (struct simplelock *)0, p); +} + +/* + * Remove the inode from the hash table. + */ +static void +cd9660_ihashrem(ip) + register struct iso_node *ip; +{ + register struct iso_node *iq; + + simple_lock(&cd9660_ihash_slock); + if ((iq = ip->i_next) != NULL) + iq->i_prev = ip->i_prev; + *ip->i_prev = iq; +#ifdef DIAGNOSTIC + ip->i_next = NULL; + ip->i_prev = NULL; +#endif + simple_unlock(&cd9660_ihash_slock); +} + +/* + * Last reference to an inode, write the inode out and if necessary, + * truncate and deallocate the file. + */ +int +cd9660_inactive(ap) + struct vop_inactive_args /* { + struct vnode *a_vp; + struct proc *a_p; + } */ *ap; +{ + struct vnode *vp = ap->a_vp; + struct proc *p = ap->a_p; + register struct iso_node *ip = VTOI(vp); + int error = 0; + + if (prtactive && vp->v_usecount != 0) + vprint("cd9660_inactive: pushing active", vp); + + ip->i_flag = 0; + VOP_UNLOCK(vp, 0, p); + /* + * If we are done with the inode, reclaim it + * so that it can be reused immediately. + */ + if (ip->inode.iso_mode == 0) + vrecycle(vp, (struct simplelock *)0, p); + return error; +} + +/* + * Reclaim an inode so that it can be used for other purposes. + */ +int +cd9660_reclaim(ap) + struct vop_reclaim_args /* { + struct vnode *a_vp; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct iso_node *ip = VTOI(vp); + + if (prtactive && vp->v_usecount != 0) + vprint("cd9660_reclaim: pushing active", vp); + /* + * Remove the inode from its hash chain. + */ + cd9660_ihashrem(ip); + /* + * Purge old data structures associated with the inode. + */ + cache_purge(vp); + if (ip->i_devvp) { + vrele(ip->i_devvp); + ip->i_devvp = 0; + } + FREE(vp->v_data, M_ISOFSNODE); + vp->v_data = NULL; + return (0); +} + +/* + * File attributes + */ +void +cd9660_defattr(isodir, inop, bp, ftype) + struct iso_directory_record *isodir; + struct iso_node *inop; + struct buf *bp; + enum ISO_FTYPE ftype; +{ + struct buf *bp2 = NULL; + struct iso_mnt *imp; + struct iso_extended_attributes *ap = NULL; + int off; + + /* high sierra does not have timezone data, flag is one byte ahead */ + if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA? + &isodir->date[6]: 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[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|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6; + inop->inode.iso_uid = (uid_t)0; + inop->inode.iso_gid = (gid_t)0; + } + if (bp2) + brelse(bp2); +} + +/* + * Time stamps + */ +void +cd9660_deftstamp(isodir,inop,bp,ftype) + struct iso_directory_record *isodir; + struct iso_node *inop; + struct buf *bp; + enum ISO_FTYPE ftype; +{ + 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 (ftype != ISO_FTYPE_HIGH_SIERRA + && 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,ftype); + inop->inode.iso_atime = inop->inode.iso_ctime; + inop->inode.iso_mtime = inop->inode.iso_ctime; + } + if (bp2) + brelse(bp2); +} + +int +cd9660_tstamp_conv7(pi,pu,ftype) + u_char *pi; + struct timespec *pu; + enum ISO_FTYPE ftype; +{ + 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]; + if(ftype != ISO_FTYPE_HIGH_SIERRA) + tz = pi[6]; + else + /* original high sierra misses timezone data */ + tz = 0; + + 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(begin,len) + u_char *begin; + int len; +{ + u_int rc; + + for (rc = 0; --len >= 0;) { + rc *= 10; + rc += *begin++ - '0'; + } + return rc; +} + +int +cd9660_tstamp_conv17(pi,pu) + 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, ISO_FTYPE_DEFAULT); +} + +ino_t +isodirino(isodir, imp) + 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); +} |
