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Diffstat (limited to 'e2fsprogs/blkid/devname.c')
-rw-r--r--e2fsprogs/blkid/devname.c368
1 files changed, 0 insertions, 368 deletions
diff --git a/e2fsprogs/blkid/devname.c b/e2fsprogs/blkid/devname.c
deleted file mode 100644
index 3d11734d5..000000000
--- a/e2fsprogs/blkid/devname.c
+++ /dev/null
@@ -1,368 +0,0 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * devname.c - get a dev by its device inode name
4 *
5 * Copyright (C) Andries Brouwer
6 * Copyright (C) 1999, 2000, 2001, 2002, 2003 Theodore Ts'o
7 * Copyright (C) 2001 Andreas Dilger
8 *
9 * %Begin-Header%
10 * This file may be redistributed under the terms of the
11 * GNU Lesser General Public License.
12 * %End-Header%
13 */
14
15#include <stdio.h>
16#include <string.h>
17#ifdef HAVE_UNISTD_H
18#include <unistd.h>
19#endif
20#include <stdlib.h>
21#include <string.h>
22#include <ctype.h>
23#ifdef HAVE_SYS_TYPES_H
24#include <sys/types.h>
25#endif
26#include <sys/stat.h>
27#ifdef HAVE_ERRNO_H
28#include <errno.h>
29#endif
30#ifdef HAVE_SYS_MKDEV_H
31#include <sys/mkdev.h>
32#endif
33#include <time.h>
34
35#include "blkidP.h"
36
37/*
38 * Find a dev struct in the cache by device name, if available.
39 *
40 * If there is no entry with the specified device name, and the create
41 * flag is set, then create an empty device entry.
42 */
43blkid_dev blkid_get_dev(blkid_cache cache, const char *devname, int flags)
44{
45 blkid_dev dev = NULL, tmp;
46 struct list_head *p;
47
48 if (!cache || !devname)
49 return NULL;
50
51 list_for_each(p, &cache->bic_devs) {
52 tmp = list_entry(p, struct blkid_struct_dev, bid_devs);
53 if (strcmp(tmp->bid_name, devname))
54 continue;
55
56 DBG(DEBUG_DEVNAME,
57 printf("found devname %s in cache\n", tmp->bid_name));
58 dev = tmp;
59 break;
60 }
61
62 if (!dev && (flags & BLKID_DEV_CREATE)) {
63 dev = blkid_new_dev();
64 if (!dev)
65 return NULL;
66 dev->bid_name = blkid_strdup(devname);
67 dev->bid_cache = cache;
68 list_add_tail(&dev->bid_devs, &cache->bic_devs);
69 cache->bic_flags |= BLKID_BIC_FL_CHANGED;
70 }
71
72 if (flags & BLKID_DEV_VERIFY)
73 dev = blkid_verify(cache, dev);
74 return dev;
75}
76
77/*
78 * Probe a single block device to add to the device cache.
79 */
80static void probe_one(blkid_cache cache, const char *ptname,
81 dev_t devno, int pri)
82{
83 blkid_dev dev = NULL;
84 struct list_head *p;
85 const char **dir;
86 char *devname = NULL;
87
88 /* See if we already have this device number in the cache. */
89 list_for_each(p, &cache->bic_devs) {
90 blkid_dev tmp = list_entry(p, struct blkid_struct_dev,
91 bid_devs);
92 if (tmp->bid_devno == devno) {
93 dev = blkid_verify(cache, tmp);
94 break;
95 }
96 }
97 if (dev && dev->bid_devno == devno)
98 goto set_pri;
99
100 /*
101 * Take a quick look at /dev/ptname for the device number. We check
102 * all of the likely device directories. If we don't find it, or if
103 * the stat information doesn't check out, use blkid_devno_to_devname()
104 * to find it via an exhaustive search for the device major/minor.
105 */
106 for (dir = blkid_devdirs; *dir; dir++) {
107 struct stat st;
108 char device[256];
109
110 sprintf(device, "%s/%s", *dir, ptname);
111 if ((dev = blkid_get_dev(cache, device, BLKID_DEV_FIND)) &&
112 dev->bid_devno == devno)
113 goto set_pri;
114
115 if (stat(device, &st) == 0 && S_ISBLK(st.st_mode) &&
116 st.st_rdev == devno) {
117 devname = blkid_strdup(device);
118 break;
119 }
120 }
121 if (!devname) {
122 devname = blkid_devno_to_devname(devno);
123 if (!devname)
124 return;
125 }
126 dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
127 free(devname);
128
129set_pri:
130 if (!pri && !strncmp(ptname, "md", 2))
131 pri = BLKID_PRI_MD;
132 if (dev)
133 dev->bid_pri = pri;
134 return;
135}
136
137#define PROC_PARTITIONS "/proc/partitions"
138#define VG_DIR "/proc/lvm/VGs"
139
140/*
141 * This function initializes the UUID cache with devices from the LVM
142 * proc hierarchy. We currently depend on the names of the LVM
143 * hierarchy giving us the device structure in /dev. (XXX is this a
144 * safe thing to do?)
145 */
146#ifdef VG_DIR
147#include <dirent.h>
148static dev_t lvm_get_devno(const char *lvm_device)
149{
150 FILE *lvf;
151 char buf[1024];
152 int ma, mi;
153 dev_t ret = 0;
154
155 DBG(DEBUG_DEVNAME, printf("opening %s\n", lvm_device));
156 if ((lvf = fopen(lvm_device, "r")) == NULL) {
157 DBG(DEBUG_DEVNAME, printf("%s: (%d) %s\n", lvm_device, errno,
158 strerror(errno)));
159 return 0;
160 }
161
162 while (fgets(buf, sizeof(buf), lvf)) {
163 if (sscanf(buf, "device: %d:%d", &ma, &mi) == 2) {
164 ret = makedev(ma, mi);
165 break;
166 }
167 }
168 fclose(lvf);
169
170 return ret;
171}
172
173static void lvm_probe_all(blkid_cache cache)
174{
175 DIR *vg_list;
176 struct dirent *vg_iter;
177 int vg_len = strlen(VG_DIR);
178 dev_t dev;
179
180 if ((vg_list = opendir(VG_DIR)) == NULL)
181 return;
182
183 DBG(DEBUG_DEVNAME, printf("probing LVM devices under %s\n", VG_DIR));
184
185 while ((vg_iter = readdir(vg_list)) != NULL) {
186 DIR *lv_list;
187 char *vdirname;
188 char *vg_name;
189 struct dirent *lv_iter;
190
191 vg_name = vg_iter->d_name;
192 if (LONE_CHAR(vg_name, '.') || !strcmp(vg_name, ".."))
193 continue;
194 vdirname = xmalloc(vg_len + strlen(vg_name) + 8);
195 sprintf(vdirname, "%s/%s/LVs", VG_DIR, vg_name);
196
197 lv_list = opendir(vdirname);
198 free(vdirname);
199 if (lv_list == NULL)
200 continue;
201
202 while ((lv_iter = readdir(lv_list)) != NULL) {
203 char *lv_name, *lvm_device;
204
205 lv_name = lv_iter->d_name;
206 if (LONE_CHAR(lv_name, '.') || !strcmp(lv_name, ".."))
207 continue;
208
209 lvm_device = xmalloc(vg_len + strlen(vg_name) +
210 strlen(lv_name) + 8);
211 sprintf(lvm_device, "%s/%s/LVs/%s", VG_DIR, vg_name,
212 lv_name);
213 dev = lvm_get_devno(lvm_device);
214 sprintf(lvm_device, "%s/%s", vg_name, lv_name);
215 DBG(DEBUG_DEVNAME, printf("LVM dev %s: devno 0x%04X\n",
216 lvm_device,
217 (unsigned int) dev));
218 probe_one(cache, lvm_device, dev, BLKID_PRI_LVM);
219 free(lvm_device);
220 }
221 closedir(lv_list);
222 }
223 closedir(vg_list);
224}
225#endif
226
227#define PROC_EVMS_VOLUMES "/proc/evms/volumes"
228
229static int
230evms_probe_all(blkid_cache cache)
231{
232 char line[100];
233 int ma, mi, sz, num = 0;
234 FILE *procpt;
235 char device[110];
236
237 procpt = fopen(PROC_EVMS_VOLUMES, "r");
238 if (!procpt)
239 return 0;
240 while (fgets(line, sizeof(line), procpt)) {
241 if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
242 &ma, &mi, &sz, device) != 4)
243 continue;
244
245 DBG(DEBUG_DEVNAME, printf("Checking partition %s (%d, %d)\n",
246 device, ma, mi));
247
248 probe_one(cache, device, makedev(ma, mi), BLKID_PRI_EVMS);
249 num++;
250 }
251 fclose(procpt);
252 return num;
253}
254
255/*
256 * Read the device data for all available block devices in the system.
257 */
258int blkid_probe_all(blkid_cache cache)
259{
260 FILE *proc;
261 char line[1024];
262 char ptname0[128], ptname1[128], *ptname = 0;
263 char *ptnames[2];
264 dev_t devs[2];
265 int ma, mi;
266 unsigned long long sz;
267 int lens[2] = { 0, 0 };
268 int which = 0, last = 0;
269
270 ptnames[0] = ptname0;
271 ptnames[1] = ptname1;
272
273 if (!cache)
274 return -BLKID_ERR_PARAM;
275
276 if (cache->bic_flags & BLKID_BIC_FL_PROBED &&
277 time(0) - cache->bic_time < BLKID_PROBE_INTERVAL)
278 return 0;
279
280 blkid_read_cache(cache);
281 evms_probe_all(cache);
282#ifdef VG_DIR
283 lvm_probe_all(cache);
284#endif
285
286 proc = fopen(PROC_PARTITIONS, "r");
287 if (!proc)
288 return -BLKID_ERR_PROC;
289
290 while (fgets(line, sizeof(line), proc)) {
291 last = which;
292 which ^= 1;
293 ptname = ptnames[which];
294
295 if (sscanf(line, " %d %d %llu %128[^\n ]",
296 &ma, &mi, &sz, ptname) != 4)
297 continue;
298 devs[which] = makedev(ma, mi);
299
300 DBG(DEBUG_DEVNAME, printf("read partition name %s\n", ptname));
301
302 /* Skip whole disk devs unless they have no partitions
303 * If we don't have a partition on this dev, also
304 * check previous dev to see if it didn't have a partn.
305 * heuristic: partition name ends in a digit.
306 *
307 * Skip extended partitions.
308 * heuristic: size is 1
309 *
310 * FIXME: skip /dev/{ida,cciss,rd} whole-disk devs
311 */
312
313 lens[which] = strlen(ptname);
314 if (isdigit(ptname[lens[which] - 1])) {
315 DBG(DEBUG_DEVNAME,
316 printf("partition dev %s, devno 0x%04X\n",
317 ptname, (unsigned int) devs[which]));
318
319 if (sz > 1)
320 probe_one(cache, ptname, devs[which], 0);
321 lens[which] = 0;
322 lens[last] = 0;
323 } else if (lens[last] && strncmp(ptnames[last], ptname,
324 lens[last])) {
325 DBG(DEBUG_DEVNAME,
326 printf("whole dev %s, devno 0x%04X\n",
327 ptnames[last], (unsigned int) devs[last]));
328 probe_one(cache, ptnames[last], devs[last], 0);
329 lens[last] = 0;
330 }
331 }
332
333 /* Handle the last device if it wasn't partitioned */
334 if (lens[which])
335 probe_one(cache, ptname, devs[which], 0);
336
337 fclose(proc);
338
339 cache->bic_time = time(0);
340 cache->bic_flags |= BLKID_BIC_FL_PROBED;
341 blkid_flush_cache(cache);
342 return 0;
343}
344
345#ifdef TEST_PROGRAM
346int main(int argc, char **argv)
347{
348 blkid_cache cache = NULL;
349 int ret;
350
351 blkid_debug_mask = DEBUG_ALL;
352 if (argc != 1) {
353 fprintf(stderr, "Usage: %s\n"
354 "Probe all devices and exit\n", argv[0]);
355 exit(1);
356 }
357 if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {
358 fprintf(stderr, "%s: error creating cache (%d)\n",
359 argv[0], ret);
360 exit(1);
361 }
362 if (blkid_probe_all(cache) < 0)
363 printf("%s: error probing devices\n", argv[0]);
364
365 blkid_put_cache(cache);
366 return 0;
367}
368#endif
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