17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * GRUB -- GRand Unified Bootloader
37c478bd9Sstevel@tonic-gate * Copyright (C) 2001 Free Software Foundation, Inc.
47c478bd9Sstevel@tonic-gate *
57c478bd9Sstevel@tonic-gate * This program is free software; you can redistribute it and/or modify
67c478bd9Sstevel@tonic-gate * it under the terms of the GNU General Public License as published by
77c478bd9Sstevel@tonic-gate * the Free Software Foundation; either version 2 of the License, or
87c478bd9Sstevel@tonic-gate * (at your option) any later version.
97c478bd9Sstevel@tonic-gate *
107c478bd9Sstevel@tonic-gate * This program is distributed in the hope that it will be useful,
117c478bd9Sstevel@tonic-gate * but WITHOUT ANY WARRANTY; without even the implied warranty of
127c478bd9Sstevel@tonic-gate * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
137c478bd9Sstevel@tonic-gate * GNU General Public License for more details.
147c478bd9Sstevel@tonic-gate *
157c478bd9Sstevel@tonic-gate * You should have received a copy of the GNU General Public License
167c478bd9Sstevel@tonic-gate * along with this program; if not, write to the Free Software
177c478bd9Sstevel@tonic-gate * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
187c478bd9Sstevel@tonic-gate */
197c478bd9Sstevel@tonic-gate
207c478bd9Sstevel@tonic-gate #ifdef FSYS_VSTAFS
217c478bd9Sstevel@tonic-gate
227c478bd9Sstevel@tonic-gate #include "shared.h"
237c478bd9Sstevel@tonic-gate #include "filesys.h"
247c478bd9Sstevel@tonic-gate #include "vstafs.h"
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate static void get_file_info (int sector);
287c478bd9Sstevel@tonic-gate static struct dir_entry *vstafs_readdir (long sector);
297c478bd9Sstevel@tonic-gate static struct dir_entry *vstafs_nextdir (void);
307c478bd9Sstevel@tonic-gate
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate #define FIRST_SECTOR ((struct first_sector *) FSYS_BUF)
337c478bd9Sstevel@tonic-gate #define FILE_INFO ((struct fs_file *) (int) FIRST_SECTOR + 8192)
347c478bd9Sstevel@tonic-gate #define DIRECTORY_BUF ((struct dir_entry *) (int) FILE_INFO + 512)
357c478bd9Sstevel@tonic-gate
367c478bd9Sstevel@tonic-gate #define ROOT_SECTOR 1
377c478bd9Sstevel@tonic-gate
387c478bd9Sstevel@tonic-gate /*
397c478bd9Sstevel@tonic-gate * In f_sector we store the sector number in which the information about
407c478bd9Sstevel@tonic-gate * the found file is.
417c478bd9Sstevel@tonic-gate */
427c478bd9Sstevel@tonic-gate extern int filepos;
437c478bd9Sstevel@tonic-gate static int f_sector;
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate int
vstafs_mount(void)467c478bd9Sstevel@tonic-gate vstafs_mount (void)
477c478bd9Sstevel@tonic-gate {
487c478bd9Sstevel@tonic-gate int retval = 1;
497c478bd9Sstevel@tonic-gate
507c478bd9Sstevel@tonic-gate if( (((current_drive & 0x80) || (current_slice != 0))
517c478bd9Sstevel@tonic-gate && current_slice != PC_SLICE_TYPE_VSTAFS)
527c478bd9Sstevel@tonic-gate || ! devread (0, 0, BLOCK_SIZE, (char *) FSYS_BUF)
537c478bd9Sstevel@tonic-gate || FIRST_SECTOR->fs_magic != 0xDEADFACE)
547c478bd9Sstevel@tonic-gate retval = 0;
557c478bd9Sstevel@tonic-gate
567c478bd9Sstevel@tonic-gate return retval;
577c478bd9Sstevel@tonic-gate }
587c478bd9Sstevel@tonic-gate
597c478bd9Sstevel@tonic-gate static void
get_file_info(int sector)607c478bd9Sstevel@tonic-gate get_file_info (int sector)
617c478bd9Sstevel@tonic-gate {
627c478bd9Sstevel@tonic-gate devread (sector, 0, BLOCK_SIZE, (char *) FILE_INFO);
637c478bd9Sstevel@tonic-gate }
647c478bd9Sstevel@tonic-gate
657c478bd9Sstevel@tonic-gate static int curr_ext, current_direntry, current_blockpos;
667c478bd9Sstevel@tonic-gate static struct alloc *a;
677c478bd9Sstevel@tonic-gate
687c478bd9Sstevel@tonic-gate static struct dir_entry *
vstafs_readdir(long sector)697c478bd9Sstevel@tonic-gate vstafs_readdir (long sector)
707c478bd9Sstevel@tonic-gate {
717c478bd9Sstevel@tonic-gate /*
727c478bd9Sstevel@tonic-gate * Get some information from the current directory
737c478bd9Sstevel@tonic-gate */
747c478bd9Sstevel@tonic-gate get_file_info (sector);
757c478bd9Sstevel@tonic-gate if (FILE_INFO->type != 2)
767c478bd9Sstevel@tonic-gate {
777c478bd9Sstevel@tonic-gate errnum = ERR_FILE_NOT_FOUND;
787c478bd9Sstevel@tonic-gate return 0;
797c478bd9Sstevel@tonic-gate }
807c478bd9Sstevel@tonic-gate
817c478bd9Sstevel@tonic-gate a = FILE_INFO->blocks;
827c478bd9Sstevel@tonic-gate curr_ext = 0;
837c478bd9Sstevel@tonic-gate devread (a[curr_ext].a_start, 0, 512, (char *) DIRECTORY_BUF);
847c478bd9Sstevel@tonic-gate current_direntry = 11;
857c478bd9Sstevel@tonic-gate current_blockpos = 0;
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate return &DIRECTORY_BUF[10];
887c478bd9Sstevel@tonic-gate }
897c478bd9Sstevel@tonic-gate
907c478bd9Sstevel@tonic-gate static struct dir_entry *
vstafs_nextdir(void)917c478bd9Sstevel@tonic-gate vstafs_nextdir (void)
927c478bd9Sstevel@tonic-gate {
937c478bd9Sstevel@tonic-gate if (current_direntry > 15)
947c478bd9Sstevel@tonic-gate {
957c478bd9Sstevel@tonic-gate current_direntry = 0;
967c478bd9Sstevel@tonic-gate if (++current_blockpos > (a[curr_ext].a_len - 1))
977c478bd9Sstevel@tonic-gate {
987c478bd9Sstevel@tonic-gate current_blockpos = 0;
997c478bd9Sstevel@tonic-gate curr_ext++;
1007c478bd9Sstevel@tonic-gate }
1017c478bd9Sstevel@tonic-gate
1027c478bd9Sstevel@tonic-gate if (curr_ext < FILE_INFO->extents)
1037c478bd9Sstevel@tonic-gate {
1047c478bd9Sstevel@tonic-gate devread (a[curr_ext].a_start + current_blockpos, 0,
1057c478bd9Sstevel@tonic-gate 512, (char *) DIRECTORY_BUF);
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate else
1087c478bd9Sstevel@tonic-gate {
1097c478bd9Sstevel@tonic-gate /* errnum =ERR_FILE_NOT_FOUND; */
1107c478bd9Sstevel@tonic-gate return 0;
1117c478bd9Sstevel@tonic-gate }
1127c478bd9Sstevel@tonic-gate }
1137c478bd9Sstevel@tonic-gate
1147c478bd9Sstevel@tonic-gate return &DIRECTORY_BUF[current_direntry++];
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate int
vstafs_dir(char * dirname)1187c478bd9Sstevel@tonic-gate vstafs_dir (char *dirname)
1197c478bd9Sstevel@tonic-gate {
1207c478bd9Sstevel@tonic-gate char *fn, ch;
1217c478bd9Sstevel@tonic-gate struct dir_entry *d;
1227c478bd9Sstevel@tonic-gate /* int l, i, s; */
1237c478bd9Sstevel@tonic-gate
1247c478bd9Sstevel@tonic-gate /*
1257c478bd9Sstevel@tonic-gate * Read in the entries of the current directory.
1267c478bd9Sstevel@tonic-gate */
1277c478bd9Sstevel@tonic-gate f_sector = ROOT_SECTOR;
1287c478bd9Sstevel@tonic-gate do
1297c478bd9Sstevel@tonic-gate {
1307c478bd9Sstevel@tonic-gate if (! (d = vstafs_readdir (f_sector)))
1317c478bd9Sstevel@tonic-gate {
1327c478bd9Sstevel@tonic-gate return 0;
1337c478bd9Sstevel@tonic-gate }
1347c478bd9Sstevel@tonic-gate
1357c478bd9Sstevel@tonic-gate /*
1367c478bd9Sstevel@tonic-gate * Find the file in the path
1377c478bd9Sstevel@tonic-gate */
1387c478bd9Sstevel@tonic-gate while (*dirname == '/') dirname++;
1397c478bd9Sstevel@tonic-gate fn = dirname;
1407c478bd9Sstevel@tonic-gate while ((ch = *fn) && ch != '/' && ! isspace (ch)) fn++;
1417c478bd9Sstevel@tonic-gate *fn = 0;
1427c478bd9Sstevel@tonic-gate
1437c478bd9Sstevel@tonic-gate do
1447c478bd9Sstevel@tonic-gate {
1457c478bd9Sstevel@tonic-gate if (d->name[0] == 0 || d->name[0] & 0x80)
1467c478bd9Sstevel@tonic-gate continue;
1477c478bd9Sstevel@tonic-gate
1487c478bd9Sstevel@tonic-gate #ifndef STAGE1_5
1497c478bd9Sstevel@tonic-gate if (print_possibilities && ch != '/'
1507c478bd9Sstevel@tonic-gate && (! *dirname || strcmp (dirname, d->name) <= 0))
1517c478bd9Sstevel@tonic-gate {
1527c478bd9Sstevel@tonic-gate if (print_possibilities > 0)
1537c478bd9Sstevel@tonic-gate print_possibilities = -print_possibilities;
1547c478bd9Sstevel@tonic-gate
1557c478bd9Sstevel@tonic-gate printf (" %s", d->name);
1567c478bd9Sstevel@tonic-gate }
1577c478bd9Sstevel@tonic-gate #endif
1587c478bd9Sstevel@tonic-gate if (! grub_strcmp (dirname, d->name))
1597c478bd9Sstevel@tonic-gate {
1607c478bd9Sstevel@tonic-gate f_sector = d->start;
1617c478bd9Sstevel@tonic-gate get_file_info (f_sector);
1627c478bd9Sstevel@tonic-gate filemax = FILE_INFO->len;
1637c478bd9Sstevel@tonic-gate break;
1647c478bd9Sstevel@tonic-gate }
1657c478bd9Sstevel@tonic-gate }
1667c478bd9Sstevel@tonic-gate while ((d =vstafs_nextdir ()));
1677c478bd9Sstevel@tonic-gate
1687c478bd9Sstevel@tonic-gate *(dirname = fn) = ch;
1697c478bd9Sstevel@tonic-gate if (! d)
1707c478bd9Sstevel@tonic-gate {
1717c478bd9Sstevel@tonic-gate if (print_possibilities < 0)
1727c478bd9Sstevel@tonic-gate {
1737c478bd9Sstevel@tonic-gate putchar ('\n');
1747c478bd9Sstevel@tonic-gate return 1;
1757c478bd9Sstevel@tonic-gate }
1767c478bd9Sstevel@tonic-gate
1777c478bd9Sstevel@tonic-gate errnum = ERR_FILE_NOT_FOUND;
1787c478bd9Sstevel@tonic-gate return 0;
1797c478bd9Sstevel@tonic-gate }
1807c478bd9Sstevel@tonic-gate }
1817c478bd9Sstevel@tonic-gate while (*dirname && ! isspace (ch));
1827c478bd9Sstevel@tonic-gate
1837c478bd9Sstevel@tonic-gate return 1;
1847c478bd9Sstevel@tonic-gate }
1857c478bd9Sstevel@tonic-gate
1867c478bd9Sstevel@tonic-gate int
vstafs_read(char * addr,int len)1877c478bd9Sstevel@tonic-gate vstafs_read (char *addr, int len)
1887c478bd9Sstevel@tonic-gate {
1897c478bd9Sstevel@tonic-gate struct alloc *a;
1907c478bd9Sstevel@tonic-gate int size, ret = 0, offset, curr_len = 0;
1917c478bd9Sstevel@tonic-gate int curr_ext;
1927c478bd9Sstevel@tonic-gate char extent;
1937c478bd9Sstevel@tonic-gate int ext_size;
1947c478bd9Sstevel@tonic-gate char *curr_pos;
1957c478bd9Sstevel@tonic-gate
1967c478bd9Sstevel@tonic-gate get_file_info (f_sector);
1977c478bd9Sstevel@tonic-gate size = FILE_INFO->len-VSTAFS_START_DATA;
1987c478bd9Sstevel@tonic-gate a = FILE_INFO->blocks;
1997c478bd9Sstevel@tonic-gate
2007c478bd9Sstevel@tonic-gate if (filepos > 0)
2017c478bd9Sstevel@tonic-gate {
2027c478bd9Sstevel@tonic-gate if (filepos < a[0].a_len * 512 - VSTAFS_START_DATA)
2037c478bd9Sstevel@tonic-gate {
2047c478bd9Sstevel@tonic-gate offset = filepos + VSTAFS_START_DATA;
2057c478bd9Sstevel@tonic-gate extent = 0;
2067c478bd9Sstevel@tonic-gate curr_len = a[0].a_len * 512 - offset - filepos;
2077c478bd9Sstevel@tonic-gate }
2087c478bd9Sstevel@tonic-gate else
2097c478bd9Sstevel@tonic-gate {
2107c478bd9Sstevel@tonic-gate ext_size = a[0].a_len * 512 - VSTAFS_START_DATA;
2117c478bd9Sstevel@tonic-gate offset = filepos - ext_size;
2127c478bd9Sstevel@tonic-gate extent = 1;
2137c478bd9Sstevel@tonic-gate do
2147c478bd9Sstevel@tonic-gate {
2157c478bd9Sstevel@tonic-gate curr_len -= ext_size;
2167c478bd9Sstevel@tonic-gate offset -= ext_size;
2177c478bd9Sstevel@tonic-gate ext_size = a[extent+1].a_len * 512;
2187c478bd9Sstevel@tonic-gate }
2197c478bd9Sstevel@tonic-gate while (extent < FILE_INFO->extents && offset>ext_size);
2207c478bd9Sstevel@tonic-gate }
2217c478bd9Sstevel@tonic-gate }
2227c478bd9Sstevel@tonic-gate else
2237c478bd9Sstevel@tonic-gate {
2247c478bd9Sstevel@tonic-gate offset = VSTAFS_START_DATA;
2257c478bd9Sstevel@tonic-gate extent = 0;
2267c478bd9Sstevel@tonic-gate curr_len = a[0].a_len * 512 - offset;
2277c478bd9Sstevel@tonic-gate }
2287c478bd9Sstevel@tonic-gate
2297c478bd9Sstevel@tonic-gate curr_pos = addr;
2307c478bd9Sstevel@tonic-gate if (curr_len > len)
2317c478bd9Sstevel@tonic-gate curr_len = len;
2327c478bd9Sstevel@tonic-gate
2337c478bd9Sstevel@tonic-gate for (curr_ext=extent;
2347c478bd9Sstevel@tonic-gate curr_ext < FILE_INFO->extents;
2357c478bd9Sstevel@tonic-gate curr_len = a[curr_ext].a_len * 512, curr_pos += curr_len, curr_ext++)
2367c478bd9Sstevel@tonic-gate {
2377c478bd9Sstevel@tonic-gate ret += curr_len;
2387c478bd9Sstevel@tonic-gate size -= curr_len;
2397c478bd9Sstevel@tonic-gate if (size < 0)
2407c478bd9Sstevel@tonic-gate {
2417c478bd9Sstevel@tonic-gate ret += size;
2427c478bd9Sstevel@tonic-gate curr_len += size;
2437c478bd9Sstevel@tonic-gate }
2447c478bd9Sstevel@tonic-gate
2457c478bd9Sstevel@tonic-gate devread (a[curr_ext].a_start,offset, curr_len, curr_pos);
2467c478bd9Sstevel@tonic-gate offset = 0;
2477c478bd9Sstevel@tonic-gate }
2487c478bd9Sstevel@tonic-gate
2497c478bd9Sstevel@tonic-gate return ret;
2507c478bd9Sstevel@tonic-gate }
2517c478bd9Sstevel@tonic-gate
2527c478bd9Sstevel@tonic-gate #endif /* FSYS_VSTAFS */
253