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-rw-r--r--libblkid/devname.c678
1 files changed, 0 insertions, 678 deletions
diff --git a/libblkid/devname.c b/libblkid/devname.c
deleted file mode 100644
index b27b6612c..000000000
--- a/libblkid/devname.c
+++ /dev/null
@@ -1,678 +0,0 @@
-/*
- * devname.c - get a dev by its device inode name
- *
- * Copyright (C) Andries Brouwer
- * Copyright (C) 1999, 2000, 2001, 2002, 2003 Theodore Ts'o
- * Copyright (C) 2001 Andreas Dilger
- *
- * %Begin-Header%
- * This file may be redistributed under the terms of the
- * GNU Lesser General Public License.
- * %End-Header%
- */
-
-#define _GNU_SOURCE 1
-
-#include <stdio.h>
-#include <string.h>
-#include <limits.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <ctype.h>
-#include <fcntl.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#include <dirent.h>
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#include <time.h>
-
-#include "blkidP.h"
-
-#include "canonicalize.h" /* $(top_srcdir)/include */
-#include "pathnames.h"
-#include "sysfs.h"
-#include "at.h"
-
-/*
- * Find a dev struct in the cache by device name, if available.
- *
- * If there is no entry with the specified device name, and the create
- * flag is set, then create an empty device entry.
- */
-blkid_dev blkid_get_dev(blkid_cache cache, const char *devname, int flags)
-{
- blkid_dev dev = NULL, tmp;
- struct list_head *p, *pnext;
-
- if (!cache || !devname)
- return NULL;
-
- list_for_each(p, &cache->bic_devs) {
- tmp = list_entry(p, struct blkid_struct_dev, bid_devs);
- if (strcmp(tmp->bid_name, devname))
- continue;
-
- DBG(DEBUG_DEVNAME,
- printf("found devname %s in cache\n", tmp->bid_name));
- dev = tmp;
- break;
- }
-
- if (!dev && (flags & BLKID_DEV_CREATE)) {
- if (access(devname, F_OK) < 0)
- return NULL;
- dev = blkid_new_dev();
- if (!dev)
- return NULL;
- dev->bid_time = INT_MIN;
- dev->bid_name = strdup(devname);
- dev->bid_cache = cache;
- list_add_tail(&dev->bid_devs, &cache->bic_devs);
- cache->bic_flags |= BLKID_BIC_FL_CHANGED;
- }
-
- if (flags & BLKID_DEV_VERIFY) {
- dev = blkid_verify(cache, dev);
- if (!dev || !(dev->bid_flags & BLKID_BID_FL_VERIFIED))
- return dev;
- /*
- * If the device is verified, then search the blkid
- * cache for any entries that match on the type, uuid,
- * and label, and verify them; if a cache entry can
- * not be verified, then it's stale and so we remove
- * it.
- */
- list_for_each_safe(p, pnext, &cache->bic_devs) {
- blkid_dev dev2 = list_entry(p, struct blkid_struct_dev, bid_devs);
- if (dev2->bid_flags & BLKID_BID_FL_VERIFIED)
- continue;
- if (!dev->bid_type || !dev2->bid_type ||
- strcmp(dev->bid_type, dev2->bid_type))
- continue;
- if (dev->bid_label && dev2->bid_label &&
- strcmp(dev->bid_label, dev2->bid_label))
- continue;
- if (dev->bid_uuid && dev2->bid_uuid &&
- strcmp(dev->bid_uuid, dev2->bid_uuid))
- continue;
- if ((dev->bid_label && !dev2->bid_label) ||
- (!dev->bid_label && dev2->bid_label) ||
- (dev->bid_uuid && !dev2->bid_uuid) ||
- (!dev->bid_uuid && dev2->bid_uuid))
- continue;
- dev2 = blkid_verify(cache, dev2);
- if (dev2 && !(dev2->bid_flags & BLKID_BID_FL_VERIFIED))
- blkid_free_dev(dev2);
- }
- }
- return dev;
-}
-
-/* Directories where we will try to search for device names */
-static const char *dirlist[] = { "/dev", "/devfs", "/devices", NULL };
-
-static int is_dm_leaf(const char *devname)
-{
- struct dirent *de, *d_de;
- DIR *dir, *d_dir;
- char path[256];
- int ret = 1;
-
- if ((dir = opendir("/sys/block")) == NULL)
- return 0;
- while ((de = readdir(dir)) != NULL) {
- if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..") ||
- !strcmp(de->d_name, devname) ||
- strncmp(de->d_name, "dm-", 3) ||
- strlen(de->d_name) > sizeof(path)-32)
- continue;
- sprintf(path, "/sys/block/%s/slaves", de->d_name);
- if ((d_dir = opendir(path)) == NULL)
- continue;
- while ((d_de = readdir(d_dir)) != NULL) {
- if (!strcmp(d_de->d_name, devname)) {
- ret = 0;
- break;
- }
- }
- closedir(d_dir);
- if (!ret)
- break;
- }
- closedir(dir);
- return ret;
-}
-
-/*
- * Probe a single block device to add to the device cache.
- */
-static void probe_one(blkid_cache cache, const char *ptname,
- dev_t devno, int pri, int only_if_new, int removable)
-{
- blkid_dev dev = NULL;
- struct list_head *p, *pnext;
- const char **dir;
- char *devname = NULL;
-
- /* See if we already have this device number in the cache. */
- list_for_each_safe(p, pnext, &cache->bic_devs) {
- blkid_dev tmp = list_entry(p, struct blkid_struct_dev,
- bid_devs);
- if (tmp->bid_devno == devno) {
- if (only_if_new && !access(tmp->bid_name, F_OK))
- return;
- dev = blkid_verify(cache, tmp);
- if (dev && (dev->bid_flags & BLKID_BID_FL_VERIFIED))
- break;
- dev = 0;
- }
- }
- if (dev && dev->bid_devno == devno)
- goto set_pri;
-
- /* Try to translate private device-mapper dm-<N> names
- * to standard /dev/mapper/<name>.
- */
- if (!strncmp(ptname, "dm-", 3) && isdigit(ptname[3])) {
- devname = canonicalize_dm_name(ptname);
- if (!devname)
- blkid__scan_dir("/dev/mapper", devno, 0, &devname);
- if (devname)
- goto get_dev;
- }
-
- /*
- * Take a quick look at /dev/ptname for the device number. We check
- * all of the likely device directories. If we don't find it, or if
- * the stat information doesn't check out, use blkid_devno_to_devname()
- * to find it via an exhaustive search for the device major/minor.
- */
- for (dir = dirlist; *dir; dir++) {
- struct stat st;
- char device[256];
-
- snprintf(device, sizeof(device), "%s/%s", *dir, ptname);
- if ((dev = blkid_get_dev(cache, device, BLKID_DEV_FIND)) &&
- dev->bid_devno == devno)
- goto set_pri;
-
- if (stat(device, &st) == 0 &&
- (S_ISBLK(st.st_mode) ||
- (S_ISCHR(st.st_mode) && !strncmp(ptname, "ubi", 3))) &&
- st.st_rdev == devno) {
- devname = strdup(device);
- goto get_dev;
- }
- }
- /* Do a short-cut scan of /dev/mapper first */
- if (!devname)
- blkid__scan_dir("/dev/mapper", devno, 0, &devname);
- if (!devname) {
- devname = blkid_devno_to_devname(devno);
- if (!devname)
- return;
- }
-
-get_dev:
- dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
- free(devname);
-
-set_pri:
- if (dev) {
- if (pri)
- dev->bid_pri = pri;
- else if (!strncmp(dev->bid_name, "/dev/mapper/", 11)) {
- dev->bid_pri = BLKID_PRI_DM;
- if (is_dm_leaf(ptname))
- dev->bid_pri += 5;
- } else if (!strncmp(ptname, "md", 2))
- dev->bid_pri = BLKID_PRI_MD;
- if (removable)
- dev->bid_flags |= BLKID_BID_FL_REMOVABLE;
- }
- return;
-}
-
-#define PROC_PARTITIONS "/proc/partitions"
-#define VG_DIR "/proc/lvm/VGs"
-
-/*
- * This function initializes the UUID cache with devices from the LVM
- * proc hierarchy. We currently depend on the names of the LVM
- * hierarchy giving us the device structure in /dev. (XXX is this a
- * safe thing to do?)
- */
-#ifdef VG_DIR
-static dev_t lvm_get_devno(const char *lvm_device)
-{
- FILE *lvf;
- char buf[1024];
- int ma, mi;
- dev_t ret = 0;
-
- DBG(DEBUG_DEVNAME, printf("opening %s\n", lvm_device));
- if ((lvf = fopen(lvm_device, "r")) == NULL) {
- DBG(DEBUG_DEVNAME, printf("%s: (%d) %m\n", lvm_device, errno));
- return 0;
- }
-
- while (fgets(buf, sizeof(buf), lvf)) {
- if (sscanf(buf, "device: %d:%d", &ma, &mi) == 2) {
- ret = makedev(ma, mi);
- break;
- }
- }
- fclose(lvf);
-
- return ret;
-}
-
-static void lvm_probe_all(blkid_cache cache, int only_if_new)
-{
- DIR *vg_list;
- struct dirent *vg_iter;
- int vg_len = strlen(VG_DIR);
- dev_t dev;
-
- if ((vg_list = opendir(VG_DIR)) == NULL)
- return;
-
- DBG(DEBUG_DEVNAME, printf("probing LVM devices under %s\n", VG_DIR));
-
- while ((vg_iter = readdir(vg_list)) != NULL) {
- DIR *lv_list;
- char *vdirname;
- char *vg_name;
- struct dirent *lv_iter;
-
- vg_name = vg_iter->d_name;
- if (!strcmp(vg_name, ".") || !strcmp(vg_name, ".."))
- continue;
- vdirname = malloc(vg_len + strlen(vg_name) + 8);
- if (!vdirname)
- goto exit;
- sprintf(vdirname, "%s/%s/LVs", VG_DIR, vg_name);
-
- lv_list = opendir(vdirname);
- free(vdirname);
- if (lv_list == NULL)
- continue;
-
- while ((lv_iter = readdir(lv_list)) != NULL) {
- char *lv_name, *lvm_device;
-
- lv_name = lv_iter->d_name;
- if (!strcmp(lv_name, ".") || !strcmp(lv_name, ".."))
- continue;
-
- lvm_device = malloc(vg_len + strlen(vg_name) +
- strlen(lv_name) + 8);
- if (!lvm_device) {
- closedir(lv_list);
- goto exit;
- }
- sprintf(lvm_device, "%s/%s/LVs/%s", VG_DIR, vg_name,
- lv_name);
- dev = lvm_get_devno(lvm_device);
- sprintf(lvm_device, "%s/%s", vg_name, lv_name);
- DBG(DEBUG_DEVNAME, printf("LVM dev %s: devno 0x%04X\n",
- lvm_device,
- (unsigned int) dev));
- probe_one(cache, lvm_device, dev, BLKID_PRI_LVM,
- only_if_new, 0);
- free(lvm_device);
- }
- closedir(lv_list);
- }
-exit:
- closedir(vg_list);
-}
-#endif
-
-#define PROC_EVMS_VOLUMES "/proc/evms/volumes"
-
-static int
-evms_probe_all(blkid_cache cache, int only_if_new)
-{
- char line[100];
- int ma, mi, sz, num = 0;
- FILE *procpt;
- char device[110];
-
- procpt = fopen(PROC_EVMS_VOLUMES, "r");
- if (!procpt)
- return 0;
- while (fgets(line, sizeof(line), procpt)) {
- if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
- &ma, &mi, &sz, device) != 4)
- continue;
-
- DBG(DEBUG_DEVNAME, printf("Checking partition %s (%d, %d)\n",
- device, ma, mi));
-
- probe_one(cache, device, makedev(ma, mi), BLKID_PRI_EVMS,
- only_if_new, 0);
- num++;
- }
- fclose(procpt);
- return num;
-}
-
-static void
-ubi_probe_all(blkid_cache cache, int only_if_new)
-{
- const char **dirname;
-
- for (dirname = dirlist; *dirname; dirname++) {
- DBG(DEBUG_DEVNAME, printf("probing UBI volumes under %s\n",
- *dirname));
-
- DIR *dir;
- struct dirent *iter;
-
- dir = opendir(*dirname);
- if (dir == NULL)
- continue ;
-
- while ((iter = readdir(dir)) != NULL) {
- char *name;
- struct stat st;
- dev_t dev;
-
- name = iter->d_name;
-#ifdef _DIRENT_HAVE_D_TYPE
- if (iter->d_type != DT_UNKNOWN &&
- iter->d_type != DT_CHR && iter->d_type != DT_LNK)
- continue;
-#endif
- if (!strcmp(name, ".") || !strcmp(name, "..") ||
- !strstr(name, "ubi"))
- continue;
- if (!strcmp(name, "ubi_ctrl"))
- continue;
- if (fstat_at(dirfd(dir), *dirname, name, &st, 0))
- continue;
-
- dev = st.st_rdev;
-
- if (!S_ISCHR(st.st_mode) || !minor(dev))
- continue;
- DBG(DEBUG_DEVNAME, printf("UBI vol %s/%s: devno 0x%04X\n",
- *dirname, name, (int) dev));
- probe_one(cache, name, dev, BLKID_PRI_UBI, only_if_new, 0);
- }
- closedir(dir);
- }
-}
-
-/*
- * Read the device data for all available block devices in the system.
- */
-static int probe_all(blkid_cache cache, int only_if_new)
-{
- FILE *proc;
- char line[1024];
- char ptname0[128 + 1], ptname1[128 + 1], *ptname = 0;
- char *ptnames[2];
- dev_t devs[2];
- int ma, mi;
- unsigned long long sz;
- int lens[2] = { 0, 0 };
- int which = 0, last = 0;
- struct list_head *p, *pnext;
-
- ptnames[0] = ptname0;
- ptnames[1] = ptname1;
-
- if (!cache)
- return -BLKID_ERR_PARAM;
-
- if (cache->bic_flags & BLKID_BIC_FL_PROBED &&
- time(0) - cache->bic_time < BLKID_PROBE_INTERVAL)
- return 0;
-
- blkid_read_cache(cache);
- evms_probe_all(cache, only_if_new);
-#ifdef VG_DIR
- lvm_probe_all(cache, only_if_new);
-#endif
- ubi_probe_all(cache, only_if_new);
-
- proc = fopen(PROC_PARTITIONS, "r");
- if (!proc)
- return -BLKID_ERR_PROC;
-
- while (fgets(line, sizeof(line), proc)) {
- last = which;
- which ^= 1;
- ptname = ptnames[which];
-
- if (sscanf(line, " %d %d %llu %128[^\n ]",
- &ma, &mi, &sz, ptname) != 4)
- continue;
- devs[which] = makedev(ma, mi);
-
- DBG(DEBUG_DEVNAME, printf("read partition name %s\n", ptname));
-
- /* Skip whole disk devs unless they have no partitions.
- * If base name of device has changed, also
- * check previous dev to see if it didn't have a partn.
- * heuristic: partition name ends in a digit, & partition
- * names contain whole device name as substring.
- *
- * Skip extended partitions.
- * heuristic: size is 1
- *
- * FIXME: skip /dev/{ida,cciss,rd} whole-disk devs
- */
-
- lens[which] = strlen(ptname);
-
- /* ends in a digit, clearly a partition, so check */
- if (isdigit(ptname[lens[which] - 1])) {
- DBG(DEBUG_DEVNAME,
- printf("partition dev %s, devno 0x%04X\n",
- ptname, (unsigned int) devs[which]));
-
- if (sz > 1)
- probe_one(cache, ptname, devs[which], 0,
- only_if_new, 0);
- lens[which] = 0; /* mark as checked */
- }
-
- /*
- * If last was a whole disk and we just found a partition
- * on it, remove the whole-disk dev from the cache if
- * it exists.
- */
- if (lens[last] && !strncmp(ptnames[last], ptname, lens[last])) {
- list_for_each_safe(p, pnext, &cache->bic_devs) {
- blkid_dev tmp;
-
- /* find blkid dev for the whole-disk devno */
- tmp = list_entry(p, struct blkid_struct_dev,
- bid_devs);
- if (tmp->bid_devno == devs[last]) {
- DBG(DEBUG_DEVNAME,
- printf("freeing %s\n",
- tmp->bid_name));
- blkid_free_dev(tmp);
- cache->bic_flags |= BLKID_BIC_FL_CHANGED;
- break;
- }
- }
- lens[last] = 0;
- }
- /*
- * If last was not checked because it looked like a whole-disk
- * dev, and the device's base name has changed,
- * check last as well.
- */
- if (lens[last] && strncmp(ptnames[last], ptname, lens[last])) {
- DBG(DEBUG_DEVNAME,
- printf("whole dev %s, devno 0x%04X\n",
- ptnames[last], (unsigned int) devs[last]));
- probe_one(cache, ptnames[last], devs[last], 0,
- only_if_new, 0);
- lens[last] = 0;
- }
- }
-
- /* Handle the last device if it wasn't partitioned */
- if (lens[which])
- probe_one(cache, ptname, devs[which], 0, only_if_new, 0);
-
- fclose(proc);
- blkid_flush_cache(cache);
- return 0;
-}
-
-/* Don't use it by default -- it's pretty slow (because cdroms, floppy, ...)
- */
-static int probe_all_removable(blkid_cache cache)
-{
- DIR *dir;
- struct dirent *d;
-
- if (!cache)
- return -BLKID_ERR_PARAM;
-
- dir = opendir(_PATH_SYS_BLOCK);
- if (!dir)
- return -BLKID_ERR_PROC;
-
- while((d = readdir(dir))) {
- struct sysfs_cxt sysfs = UL_SYSFSCXT_EMPTY;
- int removable = 0;
- dev_t devno;
-
-#ifdef _DIRENT_HAVE_D_TYPE
- if (d->d_type != DT_UNKNOWN && d->d_type != DT_LNK)
- continue;
-#endif
- if (d->d_name[0] == '.' &&
- ((d->d_name[1] == 0) ||
- ((d->d_name[1] == '.') && (d->d_name[2] == 0))))
- continue;
-
- devno = sysfs_devname_to_devno(d->d_name, NULL);
- if (!devno)
- continue;
-
- if (sysfs_init(&sysfs, devno, NULL) == 0) {
- sysfs_read_int(&sysfs, "removable", &removable);
- sysfs_deinit(&sysfs);
- }
-
- if (removable)
- probe_one(cache, d->d_name, devno, 0, 0, 1);
- }
-
- closedir(dir);
- return 0;
-}
-
-
-/**
- * blkid_probe_all:
- * @cache: cache handler
- *
- * Probes all block devices.
- *
- * Returns: 0 on success, or number less than zero in case of error.
- */
-int blkid_probe_all(blkid_cache cache)
-{
- int ret;
-
- DBG(DEBUG_PROBE, printf("Begin blkid_probe_all()\n"));
- ret = probe_all(cache, 0);
- if (ret == 0) {
- cache->bic_time = time(0);
- cache->bic_flags |= BLKID_BIC_FL_PROBED;
- }
- DBG(DEBUG_PROBE, printf("End blkid_probe_all() [rc=%d]\n", ret));
- return ret;
-}
-
-/**
- * blkid_probe_all_new:
- * @cache: cache handler
- *
- * Probes all new block devices.
- *
- * Returns: 0 on success, or number less than zero in case of error.
- */
-int blkid_probe_all_new(blkid_cache cache)
-{
- int ret;
-
- DBG(DEBUG_PROBE, printf("Begin blkid_probe_all_new()\n"));
- ret = probe_all(cache, 1);
- DBG(DEBUG_PROBE, printf("End blkid_probe_all_new() [rc=%d]\n", ret));
- return ret;
-}
-
-/**
- * blkid_probe_all_removable:
- * @cache: cache handler
- *
- * The libblkid probing is based on devices from /proc/partitions by default.
- * This file usually does not contain removable devices (e.g. CDROMs) and this kind
- * of devices are invisible for libblkid.
- *
- * This function adds removable block devices to @cache (probing is based on
- * information from the /sys directory). Don't forget that removable devices
- * (floppies, CDROMs, ...) could be pretty slow. It's very bad idea to call
- * this function by default.
- *
- * Note that devices which were detected by this function won't be written to
- * blkid.tab cache file.
- *
- * Returns: 0 on success, or number less than zero in case of error.
- */
-int blkid_probe_all_removable(blkid_cache cache)
-{
- int ret;
-
- DBG(DEBUG_PROBE, printf("Begin blkid_probe_all_removable()\n"));
- ret = probe_all_removable(cache);
- DBG(DEBUG_PROBE, printf("End blkid_probe_all_removable() [rc=%d]\n", ret));
- return ret;
-}
-
-#ifdef TEST_PROGRAM
-int main(int argc, char **argv)
-{
- blkid_cache cache = NULL;
- int ret;
-
- blkid_init_debug(DEBUG_ALL);
- if (argc != 1) {
- fprintf(stderr, "Usage: %s\n"
- "Probe all devices and exit\n", argv[0]);
- exit(1);
- }
- if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
- fprintf(stderr, "%s: error creating cache (%d)\n",
- argv[0], ret);
- exit(1);
- }
- if (blkid_probe_all(cache) < 0)
- printf("%s: error probing devices\n", argv[0]);
-
- if (blkid_probe_all_removable(cache) < 0)
- printf("%s: error probing removable devices\n", argv[0]);
-
- blkid_put_cache(cache);
- return (0);
-}
-#endif
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