Current Path : /sys/fs/cd9660/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/fs/cd9660/cd9660_rrip.c |
/*- * Copyright (c) 1993, 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. * 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_rrip.c 8.6 (Berkeley) 12/5/94 */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/fs/cd9660/cd9660_rrip.c 193066 2009-05-29 21:27:12Z jamie $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/bio.h> #include <sys/buf.h> #include <sys/jail.h> #include <sys/vnode.h> #include <sys/mount.h> #include <sys/kernel.h> #include <fs/cd9660/iso.h> #include <fs/cd9660/cd9660_node.h> #include <fs/cd9660/cd9660_rrip.h> #include <fs/cd9660/iso_rrip.h> typedef int rrt_func_t(void *, ISO_RRIP_ANALYZE *ana); typedef struct { char type[2]; rrt_func_t *func; void (*func2)(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana); int result; } RRIP_TABLE; static int cd9660_rrip_altname(ISO_RRIP_ALTNAME *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_attr(ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_cont(ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana); static void cd9660_rrip_defattr(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana); static void cd9660_rrip_defname(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana); static void cd9660_rrip_deftstamp(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_device(ISO_RRIP_DEVICE *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_extref(ISO_RRIP_EXTREF *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_idflag(ISO_RRIP_IDFLAG *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_loop(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana, RRIP_TABLE *table); static int cd9660_rrip_pclink(ISO_RRIP_CLINK *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_reldir(ISO_RRIP_RELDIR *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_slink(ISO_RRIP_SLINK *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_stop(ISO_SUSP_HEADER *p, ISO_RRIP_ANALYZE *ana); static int cd9660_rrip_tstamp(ISO_RRIP_TSTAMP *p, ISO_RRIP_ANALYZE *ana); /* * POSIX file attribute */ static int cd9660_rrip_attr(p,ana) ISO_RRIP_ATTR *p; ISO_RRIP_ANALYZE *ana; { ana->inop->inode.iso_mode = isonum_733(p->mode); ana->inop->inode.iso_uid = isonum_733(p->uid); ana->inop->inode.iso_gid = isonum_733(p->gid); ana->inop->inode.iso_links = isonum_733(p->links); ana->fields &= ~ISO_SUSP_ATTR; return ISO_SUSP_ATTR; } static void cd9660_rrip_defattr(isodir,ana) struct iso_directory_record *isodir; ISO_RRIP_ANALYZE *ana; { /* But this is a required field! */ printf("RRIP without PX field?\n"); cd9660_defattr(isodir,ana->inop,NULL,ISO_FTYPE_RRIP); } /* * Symbolic Links */ static int cd9660_rrip_slink(p,ana) ISO_RRIP_SLINK *p; ISO_RRIP_ANALYZE *ana; { ISO_RRIP_SLINK_COMPONENT *pcomp; ISO_RRIP_SLINK_COMPONENT *pcompe; int len, wlen, cont; char *outbuf, *inbuf; char hostbuf[MAXHOSTNAMELEN]; pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component; pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length)); len = *ana->outlen; outbuf = ana->outbuf; cont = ana->cont; /* * Gathering a Symbolic name from each component with path */ for (; pcomp < pcompe; pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ + isonum_711(pcomp->clen))) { if (!cont) { if (len < ana->maxlen) { len++; *outbuf++ = '/'; } } cont = 0; inbuf = ".."; wlen = 0; switch (*pcomp->cflag) { case ISO_SUSP_CFLAG_CURRENT: /* Inserting Current */ wlen = 1; break; case ISO_SUSP_CFLAG_PARENT: /* Inserting Parent */ wlen = 2; break; case ISO_SUSP_CFLAG_ROOT: /* Inserting slash for ROOT */ /* Double slash, nothing really to do here. */ break; case ISO_SUSP_CFLAG_VOLROOT: /* Inserting a mount point i.e. "/cdrom" */ /* same as above */ outbuf -= len; len = 0; inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname; wlen = strlen(inbuf); break; case ISO_SUSP_CFLAG_HOST: /* Inserting hostname i.e. "kurt.tools.de" */ getcredhostname(curthread->td_ucred, hostbuf, sizeof(hostbuf)); inbuf = hostbuf; wlen = strlen(inbuf); break; case ISO_SUSP_CFLAG_CONTINUE: cont = 1; /* FALLTHROUGH */ case 0: /* Inserting component */ wlen = isonum_711(pcomp->clen); inbuf = pcomp->name; break; default: printf("RRIP with incorrect flags?"); wlen = ana->maxlen + 1; break; } if (len + wlen > ana->maxlen) { /* indicate error to caller */ ana->cont = 1; ana->fields = 0; ana->outbuf -= *ana->outlen; *ana->outlen = 0; return 0; } bcopy(inbuf,outbuf,wlen); outbuf += wlen; len += wlen; } ana->outbuf = outbuf; *ana->outlen = len; ana->cont = cont; if (!isonum_711(p->flags)) { ana->fields &= ~ISO_SUSP_SLINK; return ISO_SUSP_SLINK; } return 0; } /* * Alternate name */ static int cd9660_rrip_altname(p,ana) ISO_RRIP_ALTNAME *p; ISO_RRIP_ANALYZE *ana; { char *inbuf; int wlen; int cont; char hostbuf[MAXHOSTNAMELEN]; inbuf = ".."; wlen = 0; cont = 0; switch (*p->flags) { case ISO_SUSP_CFLAG_CURRENT: /* Inserting Current */ wlen = 1; break; case ISO_SUSP_CFLAG_PARENT: /* Inserting Parent */ wlen = 2; break; case ISO_SUSP_CFLAG_HOST: /* Inserting hostname i.e. "kurt.tools.de" */ getcredhostname(curthread->td_ucred, hostbuf, sizeof(hostbuf)); inbuf = hostbuf; wlen = strlen(inbuf); break; case ISO_SUSP_CFLAG_CONTINUE: cont = 1; /* FALLTHROUGH */ case 0: /* Inserting component */ wlen = isonum_711(p->h.length) - 5; inbuf = (char *)p + 5; break; default: printf("RRIP with incorrect NM flags?\n"); wlen = ana->maxlen + 1; break; } if ((*ana->outlen += wlen) > ana->maxlen) { /* treat as no name field */ ana->fields &= ~ISO_SUSP_ALTNAME; ana->outbuf -= *ana->outlen - wlen; *ana->outlen = 0; return 0; } bcopy(inbuf,ana->outbuf,wlen); ana->outbuf += wlen; if (!cont) { ana->fields &= ~ISO_SUSP_ALTNAME; return ISO_SUSP_ALTNAME; } return 0; } static void cd9660_rrip_defname(isodir,ana) struct iso_directory_record *isodir; ISO_RRIP_ANALYZE *ana; { isofntrans(isodir->name,isonum_711(isodir->name_len), ana->outbuf,ana->outlen, 1,isonum_711(isodir->flags)&4, ana->imp->joliet_level, ana->imp->im_flags, ana->imp->im_d2l); switch (*ana->outbuf) { default: break; case 1: *ana->outlen = 2; /* FALLTHROUGH */ case 0: /* outlen is 1 already */ strcpy(ana->outbuf,".."); break; } } /* * Parent or Child Link */ static int cd9660_rrip_pclink(p,ana) ISO_RRIP_CLINK *p; ISO_RRIP_ANALYZE *ana; { *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift; ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK); return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK; } /* * Relocated directory */ static int cd9660_rrip_reldir(p,ana) ISO_RRIP_RELDIR *p; ISO_RRIP_ANALYZE *ana; { /* special hack to make caller aware of RE field */ *ana->outlen = 0; ana->fields = 0; return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK; } static int cd9660_rrip_tstamp(p,ana) ISO_RRIP_TSTAMP *p; ISO_RRIP_ANALYZE *ana; { u_char *ptime; ptime = p->time; /* Check a format of time stamp (7bytes/17bytes) */ if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) { if (*p->flags&ISO_SUSP_TSTAMP_CREAT) ptime += 7; if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) { cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime, ISO_FTYPE_RRIP); ptime += 7; } else bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec)); if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) { cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime, ISO_FTYPE_RRIP); ptime += 7; } else ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime; if (*p->flags&ISO_SUSP_TSTAMP_ATTR) cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime, ISO_FTYPE_RRIP); else ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime; } else { if (*p->flags&ISO_SUSP_TSTAMP_CREAT) ptime += 17; if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) { cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime); ptime += 17; } else bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec)); if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) { cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime); ptime += 17; } else ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime; if (*p->flags&ISO_SUSP_TSTAMP_ATTR) cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime); else ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime; } ana->fields &= ~ISO_SUSP_TSTAMP; return ISO_SUSP_TSTAMP; } static void cd9660_rrip_deftstamp(isodir,ana) struct iso_directory_record *isodir; ISO_RRIP_ANALYZE *ana; { cd9660_deftstamp(isodir,ana->inop,NULL,ISO_FTYPE_RRIP); } /* * POSIX device modes */ static int cd9660_rrip_device(p,ana) ISO_RRIP_DEVICE *p; ISO_RRIP_ANALYZE *ana; { u_int high, low; high = isonum_733(p->dev_t_high); low = isonum_733(p->dev_t_low); if (high == 0) ana->inop->inode.iso_rdev = makedev(major(low), minor(low)); else ana->inop->inode.iso_rdev = makedev(high, minor(low)); ana->fields &= ~ISO_SUSP_DEVICE; return ISO_SUSP_DEVICE; } /* * Flag indicating */ static int cd9660_rrip_idflag(p,ana) ISO_RRIP_IDFLAG *p; ISO_RRIP_ANALYZE *ana; { ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */ /* special handling of RE field */ if (ana->fields&ISO_SUSP_RELDIR) return cd9660_rrip_reldir(/* XXX */ (ISO_RRIP_RELDIR *)p,ana); return ISO_SUSP_IDFLAG; } /* * Continuation pointer */ static int cd9660_rrip_cont(p,ana) ISO_RRIP_CONT *p; ISO_RRIP_ANALYZE *ana; { ana->iso_ce_blk = isonum_733(p->location); ana->iso_ce_off = isonum_733(p->offset); ana->iso_ce_len = isonum_733(p->length); return ISO_SUSP_CONT; } /* * System Use end */ static int cd9660_rrip_stop(p,ana) ISO_SUSP_HEADER *p; ISO_RRIP_ANALYZE *ana; { return ISO_SUSP_STOP; } /* * Extension reference */ static int cd9660_rrip_extref(p,ana) ISO_RRIP_EXTREF *p; ISO_RRIP_ANALYZE *ana; { if ( ! ((isonum_711(p->len_id) == 10 && bcmp((char *)p + 8,"RRIP_1991A",10) == 0) || (isonum_711(p->len_id) == 10 && bcmp((char *)p + 8,"IEEE_P1282",10) == 0) || (isonum_711(p->len_id) == 9 && bcmp((char *)p + 8,"IEEE_1282", 9) == 0)) || isonum_711(p->version) != 1) return 0; ana->fields &= ~ISO_SUSP_EXTREF; return ISO_SUSP_EXTREF; } static int cd9660_rrip_loop(isodir,ana,table) struct iso_directory_record *isodir; ISO_RRIP_ANALYZE *ana; RRIP_TABLE *table; { RRIP_TABLE *ptable; ISO_SUSP_HEADER *phead; ISO_SUSP_HEADER *pend; struct buf *bp = NULL; char *pwhead; u_short c; int result; /* * Note: If name length is odd, * it will be padding 1 byte after the name */ pwhead = isodir->name + isonum_711(isodir->name_len); if (!(isonum_711(isodir->name_len)&1)) pwhead++; isochar(isodir->name, pwhead, ana->imp->joliet_level, &c, NULL, ana->imp->im_flags, ana->imp->im_d2l); /* If it's not the '.' entry of the root dir obey SP field */ if (c != 0 || isonum_733(isodir->extent) != ana->imp->root_extent) pwhead += ana->imp->rr_skip; else pwhead += ana->imp->rr_skip0; phead = (ISO_SUSP_HEADER *)pwhead; pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length)); result = 0; while (1) { ana->iso_ce_len = 0; /* * Note: "pend" should be more than one SUSP header */ while (pend >= phead + 1) { if (isonum_711(phead->version) == 1) { for (ptable = table; ptable->func; ptable++) { if (*phead->type == *ptable->type && phead->type[1] == ptable->type[1]) { result |= ptable->func(phead,ana); break; } } if (!ana->fields) break; } if (result&ISO_SUSP_STOP) { result &= ~ISO_SUSP_STOP; break; } /* plausibility check */ if (isonum_711(phead->length) < sizeof(*phead)) break; /* * move to next SUSP * Hopefully this works with newer versions, too */ phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length)); } if (ana->fields && ana->iso_ce_len) { if (ana->iso_ce_blk >= ana->imp->volume_space_size || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size || bread(ana->imp->im_devvp, ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT), ana->imp->logical_block_size, NOCRED, &bp)) /* what to do now? */ break; phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off); pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len); } else break; } if (bp) brelse(bp); /* * If we don't find the Basic SUSP stuffs, just set default value * (attribute/time stamp) */ for (ptable = table; ptable->func2; ptable++) if (!(ptable->result&result)) ptable->func2(isodir,ana); return result; } /* * Get Attributes. */ /* * XXX the casts are bogus but will do for now. */ #define BC (rrt_func_t *) static RRIP_TABLE rrip_table_analyze[] = { { "PX", BC cd9660_rrip_attr, cd9660_rrip_defattr, ISO_SUSP_ATTR }, { "TF", BC cd9660_rrip_tstamp, cd9660_rrip_deftstamp, ISO_SUSP_TSTAMP }, { "PN", BC cd9660_rrip_device, 0, ISO_SUSP_DEVICE }, { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG }, { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT }, { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP }, { "", 0, 0, 0 } }; int cd9660_rrip_analyze(isodir,inop,imp) struct iso_directory_record *isodir; struct iso_node *inop; struct iso_mnt *imp; { ISO_RRIP_ANALYZE analyze; analyze.inop = inop; analyze.imp = imp; analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE; return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze); } /* * Get Alternate Name. */ static RRIP_TABLE rrip_table_getname[] = { { "NM", BC cd9660_rrip_altname, cd9660_rrip_defname, ISO_SUSP_ALTNAME }, { "CL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK }, { "PL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK }, { "RE", BC cd9660_rrip_reldir, 0, ISO_SUSP_RELDIR }, { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG }, { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT }, { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP }, { "", 0, 0, 0 } }; int cd9660_rrip_getname(isodir,outbuf,outlen,inump,imp) struct iso_directory_record *isodir; char *outbuf; u_short *outlen; ino_t *inump; struct iso_mnt *imp; { ISO_RRIP_ANALYZE analyze; RRIP_TABLE *tab; u_short c; analyze.outbuf = outbuf; analyze.outlen = outlen; analyze.maxlen = NAME_MAX; analyze.inump = inump; analyze.imp = imp; analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK; *outlen = 0; isochar(isodir->name, isodir->name + isonum_711(isodir->name_len), imp->joliet_level, &c, NULL, imp->im_flags, imp->im_d2l); tab = rrip_table_getname; if (c == 0 || c == 1) { cd9660_rrip_defname(isodir,&analyze); analyze.fields &= ~ISO_SUSP_ALTNAME; tab++; } return cd9660_rrip_loop(isodir,&analyze,tab); } /* * Get Symbolic Link. */ static RRIP_TABLE rrip_table_getsymname[] = { { "SL", BC cd9660_rrip_slink, 0, ISO_SUSP_SLINK }, { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG }, { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT }, { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP }, { "", 0, 0, 0 } }; int cd9660_rrip_getsymname(isodir,outbuf,outlen,imp) struct iso_directory_record *isodir; char *outbuf; u_short *outlen; struct iso_mnt *imp; { ISO_RRIP_ANALYZE analyze; analyze.outbuf = outbuf; analyze.outlen = outlen; *outlen = 0; analyze.maxlen = MAXPATHLEN; analyze.cont = 1; /* don't start with a slash */ analyze.imp = imp; analyze.fields = ISO_SUSP_SLINK; return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK); } static RRIP_TABLE rrip_table_extref[] = { { "ER", BC cd9660_rrip_extref, 0, ISO_SUSP_EXTREF }, { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT }, { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP }, { "", 0, 0, 0 } }; /* * Check for Rock Ridge Extension and return offset of its fields. * Note: We insist on the ER field. */ int cd9660_rrip_offset(isodir,imp) struct iso_directory_record *isodir; struct iso_mnt *imp; { ISO_RRIP_OFFSET *p; ISO_RRIP_ANALYZE analyze; imp->rr_skip0 = 0; p = (ISO_RRIP_OFFSET *)(isodir->name + 1); if (bcmp(p,"SP\7\1\276\357",6)) { /* Maybe, it's a CDROM XA disc? */ imp->rr_skip0 = 15; p = (ISO_RRIP_OFFSET *)((char *)p + 15); if (bcmp(p,"SP\7\1\276\357",6)) return -1; } analyze.imp = imp; analyze.fields = ISO_SUSP_EXTREF; if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF)) return -1; return isonum_711(p->skip); }