2 * file.c - Filesystem related interfaces
4 * Copyright (C) 2001, 2002 Ethan Benson
8 * Copyright (C) 2001 Colin Walters
10 * Copyright (C) 1999 Benjamin Herrenschmidt
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 #include "partition.h"
39 extern char bootdevice[1024];
41 /* This function follows the device path in the devtree and separates
42 the device name, partition number, and other datas (mostly file name)
43 the string passed in parameters is changed since 0 are put in place
44 of some separators to terminate the various strings.
46 when a default device is supplied imagepath will be assumed to be a
47 plain filename unless it contains a : otherwise if defaultdev is
48 NULL imagepath will be assumed to be a device path.
50 returns 1 on success 0 on failure.
53 - /pci@80000000/pci-bridge@d/ADPT,2930CU@2/@1:4
54 - /pci@80000000/pci-bridge@d/ADPT,2930CU@2/@1:4,/boot/vmlinux
56 - enet:10.0.0.1,/tftpboot/vmlinux
57 - enet:,/tftpboot/vmlinux
60 Supported only if defdevice == NULL
62 - any other device path lacking a :
64 - hd:2,\\:tbxi <- no filename will be detected due to the extra :
65 - enet:192.168.2.1,bootme,c-iaddr,g-iaddr,subnet-mask,bootp-retries,tftp-retries */
68 parse_device_path(char *imagepath, char *defdevice, int defpart,
69 char *deffile, struct boot_fspec_t *result)
82 ipath = strdup(imagepath);
85 defdev = strdup(defdevice);
88 if (!strstr(defdev, "ethernet") && !strstr(defdev, "enet")) {
89 if ((ptr = strrchr(defdev, ':')) != NULL)
90 *ptr = 0; /* remove trailing : from defdevice if necessary */
94 /* if there is no : then there is no filename or partition. must
95 use strrchr() since enet:,10.0.0.1,file is legal */
97 if (strchr(ipath, ':') != NULL) {
98 if ((ptr = strrchr(ipath, ',')) != NULL) {
99 char *colon = strrchr(ipath, ':');
100 /* If a ':' occurs *after* a ',', then we assume that there is
102 if (!colon || colon < ptr) {
103 result->file = strdup(ptr+1);
104 /* Trim the filename off */
110 if (strstr(ipath, "ethernet") || strstr(ipath, "enet"))
111 if ((ptr = strstr(ipath, "bootp")) != NULL) { /* `n' key booting boots enet:bootp */
113 result->dev = strdup(ipath);
115 result->dev = strdup(ipath);
116 else if ((ptr = strchr(ipath, ':')) != NULL) {
118 result->dev = strdup(ipath);
120 result->part = simple_strtol(ptr+1, NULL, 10);
121 } else if (!defdev) {
122 result->dev = strdup(ipath);
123 } else if (strlen(ipath)) {
124 result->file = strdup(ipath);
129 if (!result->dev && defdev)
130 result->dev = strdup(defdev);
132 if (result->part < 0)
133 result->part = defpart;
136 result->file = strdup(deffile);
146 file_block_open( struct boot_file_t* file,
147 const char* dev_name,
148 const char* file_name,
151 struct partition_t* parts;
152 struct partition_t* p;
153 struct partition_t* found;
155 parts = partitions_lookup(dev_name);
160 prom_printf("partitions:\n");
162 prom_printf("no partitions found.\n");
164 for (p = parts; p && !found; p=p->next) {
165 DEBUG_F("number: %02d, start: 0x%08lx, length: 0x%08lx\n",
166 p->part_number, p->part_start, p->part_size );
167 if (partition == -1) {
168 file->fs = fs_open( file, dev_name, p, file_name );
169 if (file->fs != FILE_ERR_OK)
172 if ((partition >= 0) && (partition == p->part_number))
176 prom_printf(" (match)\n");
180 /* Note: we don't skip when found is NULL since we can, in some
181 * cases, let OF figure out a default partition.
183 DEBUG_F( "Using OF defaults.. (found = %p)\n", found );
184 file->fs = fs_open( file, dev_name, found, file_name );
188 partitions_free(parts);
194 file_net_open( struct boot_file_t* file,
195 const char* dev_name,
196 const char* file_name)
198 file->fs = fs_of_netboot;
199 return fs_of_netboot->open(file, dev_name, NULL, file_name);
203 default_read( struct boot_file_t* file,
207 prom_printf("WARNING ! default_read called !\n");
212 default_seek( struct boot_file_t* file,
215 prom_printf("WARNING ! default_seek called !\n");
220 default_close( struct boot_file_t* file)
222 prom_printf("WARNING ! default_close called !\n");
226 static struct fs_t fs_default =
236 int open_file(const struct boot_fspec_t* spec, struct boot_file_t* file)
240 memset(file, 0, sizeof(struct boot_file_t*));
241 file->fs = &fs_default;
243 DEBUG_F("dev_path = %s\nfile_name = %s\npartition = %d\n",
244 spec->dev, spec->file, spec->part);
246 result = prom_get_devtype(spec->dev);
248 file->device_kind = result;
252 switch(file->device_kind) {
253 case FILE_DEVICE_BLOCK:
254 DEBUG_F("device is a block device\n");
255 return file_block_open(file, spec->dev, spec->file, spec->part);
256 case FILE_DEVICE_NET:
257 DEBUG_F("device is a network device\n");
258 return file_net_open(file, spec->dev, spec->file);
265 * c-file-style: "k&r"