2 * ISO 9660 filesystem backend for GRUB (GRand Unified Bootloader)
3 * including Rock Ridge Extensions support
5 * Copyright (C) 1998, 1999 Kousuke Takai <tak@kmc.kyoto-u.ac.jp>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * linux/fs/isofs/rock.[ch]
24 * mkisofs-1.11.1/diag/isoinfo.c
25 * mkisofs-1.11.1/iso9660.h
26 * (all are written by Eric Youngdale)
29 * Leonid Lisovskiy <lly@pisem.net> 2003
33 * Modified to make it work with FILO
34 * 2003-10 by SONE Takeshi
37 #include <console/console.h>
39 #include <fs/iso9660.h>
42 struct iso_superblock {
43 unsigned long vol_sector;
45 unsigned long file_start;
48 #define ISO_SUPER ((struct iso_superblock *)(FSYS_BUF))
49 #define PRIMDESC ((struct iso_primary_descriptor *)(FSYS_BUF + 2048))
50 #define DIRREC ((struct iso_directory_record *)(FSYS_BUF + 4096))
51 #define RRCONT_BUF ((unsigned char *)(FSYS_BUF + 6144))
52 #define NAME_BUF ((unsigned char *)(FSYS_BUF + 8192))
55 iso9660_devread (int sector, int byte_offset, int byte_len, char *buf)
57 /* FILO uses 512-byte "soft" sector, and ISO-9660 uses 2048-byte
59 return devread(sector<<2, byte_offset, byte_len, buf);
68 * Because there is no defined slice type ID for ISO-9660 filesystem,
69 * this test will pass only either (1) if entire disk is used, or
70 * (2) if current partition is BSD style sub-partition whose ID is
73 /*if ((current_partition != 0xFFFFFF)
74 && !IS_PC_SLICE_TYPE_BSD_WITH_FS(current_slice, FS_ISO9660))
78 * Currently, only FIRST session of MultiSession disks are supported !!!
80 for (sector = 16 ; sector < 32 ; sector++)
82 if (!iso9660_devread(sector, 0, sizeof(*PRIMDESC), (char *)PRIMDESC))
84 /* check ISO_VD_PRIMARY and ISO_STANDARD_ID */
85 if (isonum_711(PRIMDESC->type) == ISO_VD_PRIMARY &&
86 !__builtin_memcmp(PRIMDESC->id, "CD001", 5))
88 ISO_SUPER->vol_sector = sector;
89 ISO_SUPER->file_start = 0;
90 fsmax = isonum_733(PRIMDESC->volume_space_size);
99 iso9660_dir (char *dirname)
101 struct iso_directory_record *idr;
103 struct rock_ridge *ce_ptr;
104 unsigned int pathlen;
108 unsigned char file_type;
109 unsigned char rr_flag;
111 idr = (struct iso_directory_record *)&PRIMDESC->root_directory_record;
112 ISO_SUPER->file_start = 0;
116 while (*dirname == '/') /* skip leading slashes */
118 /* pathlen = strcspn(dirname, "/\n\t "); */
121 && !isspace(dirname[pathlen]) && dirname[pathlen] != '/' ;
125 size = isonum_733(idr->size);
126 extent = isonum_733(idr->extent);
130 if (!iso9660_devread(extent, 0, ISO_SECTOR_SIZE, (char *)DIRREC))
132 errnum = ERR_FSYS_CORRUPT;
137 idr = (struct iso_directory_record *)DIRREC;
138 for (; isonum_711(idr->length) > 0;
139 idr = (struct iso_directory_record *)((char *)idr + isonum_711(idr->length)) )
141 const char *name = idr->name;
142 unsigned int name_len = isonum_711(idr->name_len);
144 file_type = (isonum_711(idr->flags) & 2) ? ISO_DIRECTORY : ISO_REGULAR;
147 if ((name[0] == 0) || /* self */
148 (name[0] == 1)) /* parent */
152 name[name_len - 2] == ';' &&
153 name[name_len - 1] == '1')
155 name_len -= 2; /* truncate trailing file version */
156 if (name_len > 1 && name[name_len - 1] == '.')
157 name_len--; /* truncate trailing dot */
161 * Parse Rock-Ridge extension
163 rr_len = (isonum_711(idr->length) - isonum_711(idr->name_len)
164 - sizeof(struct iso_directory_record)
165 + sizeof(idr->name));
166 rr_ptr.ptr = ((unsigned char *)idr + isonum_711(idr->name_len)
167 + sizeof(struct iso_directory_record)
168 - sizeof(idr->name));
170 rr_ptr.i++, rr_len--;
172 rr_flag = RR_FLAG_NM | RR_FLAG_PX;
176 if (rr_ptr.rr->version != 1)
181 "Non-supported version (%d) RockRidge chunk "
182 "`%c%c'\n", rr_ptr.rr->version,
183 rr_ptr.rr->signature[0],
184 rr_ptr.rr->signature[1]);
188 else if (rr_ptr.rr->signature[0] == 'R'
189 && rr_ptr.rr->signature[1] == 'R'
190 && rr_ptr.rr->len >= 5)
191 rr_flag &= isonum_711(rr_ptr.rr->u.RR.flags);
192 else if (rr_ptr.rr->signature[0] == 'N'
193 && rr_ptr.rr->signature[1] == 'M')
195 name = rr_ptr.rr->u.NM.name;
196 name_len = rr_ptr.rr->len - 5;
197 rr_flag &= ~RR_FLAG_NM;
199 else if (rr_ptr.rr->signature[0] == 'P'
200 && rr_ptr.rr->signature[1] == 'X'
201 && rr_ptr.rr->len >= 36)
203 unsigned int mode = isonum_733(rr_ptr.rr->u.PX.mode);
204 file_type = ((mode & POSIX_S_IFMT)
207 : ((mode & POSIX_S_IFMT)
209 ? ISO_DIRECTORY : ISO_OTHER));
210 rr_flag &= ~RR_FLAG_PX;
212 else if (rr_ptr.rr->signature[0] == 'C'
213 && rr_ptr.rr->signature[1] == 'E'
214 && rr_ptr.rr->len >= 28)
218 * There is no more extension we expects...
221 rr_len -= rr_ptr.rr->len;
222 rr_ptr.ptr += rr_ptr.rr->len;
223 if (rr_len < 4 && ce_ptr != 0)
225 /* preserve name before loading new extent. */
226 if( RRCONT_BUF <= (unsigned char *)name
227 && (unsigned char *)name < RRCONT_BUF + ISO_SECTOR_SIZE )
229 memcpy(NAME_BUF, name, name_len);
232 rr_ptr.ptr = RRCONT_BUF + isonum_733(ce_ptr->u.CE.offset);
233 rr_len = isonum_733(ce_ptr->u.CE.size);
234 if (!iso9660_devread(isonum_733(ce_ptr->u.CE.extent), 0, ISO_SECTOR_SIZE, RRCONT_BUF))
236 errnum = 0; /* this is not fatal. */
244 if (name_len >= pathlen
245 && !__builtin_memcmp(name, dirname, pathlen))
247 if (dirname[pathlen] == '/' || !print_possibilities)
250 * DIRNAME is directory component of pathname,
251 * or we are to open a file.
253 if (pathlen == name_len)
255 if (dirname[pathlen] == '/')
257 if (file_type != ISO_DIRECTORY)
259 errnum = ERR_BAD_FILETYPE;
264 if (file_type != ISO_REGULAR)
266 errnum = ERR_BAD_FILETYPE;
269 ISO_SUPER->file_start = isonum_733(idr->extent);
271 filemax = isonum_733(idr->size);
275 else /* Completion */
278 if (print_possibilities > 0)
279 print_possibilities = -print_possibilities;
280 memcpy(NAME_BUF, name, name_len);
281 NAME_BUF[name_len] = '\0';
282 print_a_completion (NAME_BUF);
288 size -= ISO_SECTOR_SIZE;
291 if (dirname[pathlen] == '/' || print_possibilities >= 0)
293 errnum = ERR_FILE_NOT_FOUND;
300 } while (*dirname == '/');
306 iso9660_read (char *buf, int len)
308 int sector, blkoffset, size, ret;
310 if (ISO_SUPER->file_start == 0)
314 blkoffset = filepos & (ISO_SECTOR_SIZE - 1);
315 sector = filepos >> ISO_SECTOR_BITS;
318 size = ISO_SECTOR_SIZE - blkoffset;
322 disk_read_func = disk_read_hook;
324 if (!iso9660_devread(ISO_SUPER->file_start + sector, blkoffset, size, buf))