devname.c revision 3984b61df41c68966bdfbb2a5e5a45ef4b9a536c
119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * devname.c - get a dev by its device inode name 319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) Andries Brouwer 519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) 1999, 2000, 2001, 2002, 2003 Theodore Ts'o 619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) 2001 Andreas Dilger 719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * %Begin-Header% 919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * This file may be redistributed under the terms of the 1019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * GNU Lesser General Public License. 1119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * %End-Header% 1219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 1319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define _GNU_SOURCE 1 1519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <stdio.h> 1719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <string.h> 1819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <limits.h> 1919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_UNISTD_H 2019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <unistd.h> 2119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 2219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <stdlib.h> 2319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <string.h> 2419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <ctype.h> 2519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_SYS_TYPES_H 2619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <sys/types.h> 2719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 283984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#include <dirent.h> 2919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_SYS_STAT_H 3019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <sys/stat.h> 3119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 3219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_ERRNO_H 3319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <errno.h> 3419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 3519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if HAVE_SYS_MKDEV_H 3619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <sys/mkdev.h> 3719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 3819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <time.h> 3919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 4019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include "blkidP.h" 4119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 4219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 4319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Find a dev struct in the cache by device name, if available. 4419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 4519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * If there is no entry with the specified device name, and the create 4619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * flag is set, then create an empty device entry. 4719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 4819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectblkid_dev blkid_get_dev(blkid_cache cache, const char *devname, int flags) 4919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 5019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_dev dev = NULL, tmp; 513984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt struct list_head *p, *pnext; 5219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!cache || !devname) 5419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return NULL; 5519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project list_for_each(p, &cache->bic_devs) { 5719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project tmp = list_entry(p, struct blkid_struct_dev, bid_devs); 5819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (strcmp(tmp->bid_name, devname)) 5919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 6019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 613984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt DBG(DEBUG_DEVNAME, 6219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project printf("found devname %s in cache\n", tmp->bid_name)); 6319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = tmp; 6419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project break; 6519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 6619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 6719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!dev && (flags & BLKID_DEV_CREATE)) { 683984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (access(devname, F_OK) < 0) 693984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return NULL; 7019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = blkid_new_dev(); 7119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!dev) 7219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return NULL; 7319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev->bid_time = INT_MIN; 7419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev->bid_name = blkid_strdup(devname); 7519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev->bid_cache = cache; 7619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project list_add_tail(&dev->bid_devs, &cache->bic_devs); 7719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project cache->bic_flags |= BLKID_BIC_FL_CHANGED; 7819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 7919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 803984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (flags & BLKID_DEV_VERIFY) { 8119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = blkid_verify(cache, dev); 823984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!dev || !(dev->bid_flags & BLKID_BID_FL_VERIFIED)) 833984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return dev; 843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* 853984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * If the device is verified, then search the blkid 863984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * cache for any entries that match on the type, uuid, 873984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * and label, and verify them; if a cache entry can 883984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * not be verified, then it's stale and so we remove 893984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * it. 903984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt */ 913984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt list_for_each_safe(p, pnext, &cache->bic_devs) { 923984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid_dev dev2; 933984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!p) 943984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt break; 953984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev2 = list_entry(p, struct blkid_struct_dev, bid_devs); 963984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev2->bid_flags & BLKID_BID_FL_VERIFIED) 973984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 983984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!dev->bid_type || !dev2->bid_type || 993984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcmp(dev->bid_type, dev2->bid_type)) 1003984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1013984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev->bid_label && dev2->bid_label && 1023984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcmp(dev->bid_label, dev2->bid_label)) 1033984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1043984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev->bid_uuid && dev2->bid_uuid && 1053984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strcmp(dev->bid_uuid, dev2->bid_uuid)) 1063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1073984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if ((dev->bid_label && !dev2->bid_label) || 1083984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt (!dev->bid_label && dev2->bid_label) || 1093984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt (dev->bid_uuid && !dev2->bid_uuid) || 1103984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt (!dev->bid_uuid && dev2->bid_uuid)) 1113984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1123984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev2 = blkid_verify(cache, dev2); 1133984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev2 && !(dev2->bid_flags & BLKID_BID_FL_VERIFIED)) 1143984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid_free_dev(dev2); 1153984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1163984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 11719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return dev; 11819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 11919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1203984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt/* Directories where we will try to search for device names */ 1213984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtstatic const char *dirlist[] = { "/dev", "/devfs", "/devices", NULL }; 1223984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 1233984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtstatic int is_dm_leaf(const char *devname) 1243984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt{ 1253984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt struct dirent *de, *d_de; 1263984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt DIR *dir, *d_dir; 1273984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt char path[256]; 1283984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt int ret = 1; 1293984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 1303984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if ((dir = opendir("/sys/block")) == NULL) 1313984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return 0; 1323984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt while ((de = readdir(dir)) != NULL) { 1333984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..") || 1343984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt !strcmp(de->d_name, devname) || 1353984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strncmp(de->d_name, "dm-", 3) || 1363984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt strlen(de->d_name) > sizeof(path)-32) 1373984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1383984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt sprintf(path, "/sys/block/%s/slaves", de->d_name); 1393984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if ((d_dir = opendir(path)) == NULL) 1403984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt continue; 1413984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt while ((d_de = readdir(d_dir)) != NULL) { 1423984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!strcmp(d_de->d_name, devname)) { 1433984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt ret = 0; 1443984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt break; 1453984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1463984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1473984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt closedir(d_dir); 1483984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!ret) 1493984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt break; 1503984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1513984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt closedir(dir); 1523984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return ret; 1533984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt} 1543984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 1553984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt/* 1563984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * Since 2.6.29 (patch 784aae735d9b0bba3f8b9faef4c8b30df3bf0128) kernel sysfs 1573984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * provides the real DM device names in /sys/block/<ptname>/dm/name 1583984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt */ 1593984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtstatic char *get_dm_name(const char *ptname) 1603984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt{ 1613984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt FILE *f; 1623984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt size_t sz; 1633984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt char path[256], name[256], *res = NULL; 1643984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 1653984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt snprintf(path, sizeof(path), "/sys/block/%s/dm/name", ptname); 1663984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if ((f = fopen(path, "r")) == NULL) 1673984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return NULL; 1683984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 1693984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* read "<name>\n" from sysfs */ 1703984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (fgets(name, sizeof(name), f) && (sz = strlen(name)) > 1) { 1713984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt name[sz - 1] = '\0'; 1723984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt snprintf(path, sizeof(path), "/dev/mapper/%s", name); 1733984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt res = blkid_strdup(path); 1743984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 1753984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt fclose(f); 1763984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt return res; 1773984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt} 17819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 18019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Probe a single block device to add to the device cache. 18119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 18219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic void probe_one(blkid_cache cache, const char *ptname, 18319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev_t devno, int pri, int only_if_new) 18419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 18519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_dev dev = NULL; 1863984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt struct list_head *p, *pnext; 18719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project const char **dir; 18819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char *devname = NULL; 18919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* See if we already have this device number in the cache. */ 1913984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt list_for_each_safe(p, pnext, &cache->bic_devs) { 19219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_dev tmp = list_entry(p, struct blkid_struct_dev, 19319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project bid_devs); 19419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (tmp->bid_devno == devno) { 1953984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (only_if_new && !access(tmp->bid_name, F_OK)) 19619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return; 19719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = blkid_verify(cache, tmp); 1983984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev && (dev->bid_flags & BLKID_BID_FL_VERIFIED)) 1993984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt break; 2003984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev = 0; 20119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 20219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 20319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (dev && dev->bid_devno == devno) 20419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto set_pri; 20519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* Try to translate private device-mapper dm-<N> names 2073984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * to standard /dev/mapper/<name>. 2083984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt */ 2093984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!strncmp(ptname, "dm-", 3) && isdigit(ptname[3])) { 2103984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt devname = get_dm_name(ptname); 2113984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!devname) 2123984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid__scan_dir("/dev/mapper", devno, 0, &devname); 2133984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (devname) 2143984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt goto get_dev; 2153984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 2163984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 21719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 21819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Take a quick look at /dev/ptname for the device number. We check 21919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * all of the likely device directories. If we don't find it, or if 22019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the stat information doesn't check out, use blkid_devno_to_devname() 22119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * to find it via an exhaustive search for the device major/minor. 22219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 2233984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt for (dir = dirlist; *dir; dir++) { 22419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct stat st; 22519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char device[256]; 22619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 22719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project sprintf(device, "%s/%s", *dir, ptname); 22819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if ((dev = blkid_get_dev(cache, device, BLKID_DEV_FIND)) && 22919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev->bid_devno == devno) 23019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto set_pri; 23119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2323984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (stat(device, &st) == 0 && S_ISBLK(st.st_mode) && 23319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project st.st_rdev == devno) { 23419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project devname = blkid_strdup(device); 2353984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt goto get_dev; 23619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 23719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 2383984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* Do a short-cut scan of /dev/mapper first */ 2393984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!devname) 2403984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt devname = get_dm_name(ptname); 2413984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (!devname) 2423984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid__scan_dir("/dev/mapper", devno, 0, &devname); 24319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!devname) { 24419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project devname = blkid_devno_to_devname(devno); 24519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!devname) 24619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return; 24719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 2483984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtget_dev: 24919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL); 25019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project free(devname); 25119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectset_pri: 2523984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (dev) { 2533984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (pri) 2543984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev->bid_pri = pri; 2553984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt else if (!strncmp(dev->bid_name, "/dev/mapper/", 11)) { 2563984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev->bid_pri = BLKID_PRI_DM; 2573984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (is_dm_leaf(ptname)) 2583984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev->bid_pri += 5; 2593984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } else if (!strncmp(ptname, "md", 2)) 2603984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt dev->bid_pri = BLKID_PRI_MD; 2613984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 26219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return; 26319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 26419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 26519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define PROC_PARTITIONS "/proc/partitions" 26619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define VG_DIR "/proc/lvm/VGs" 26719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 26819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 26919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * This function initializes the UUID cache with devices from the LVM 27019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * proc hierarchy. We currently depend on the names of the LVM 27119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * hierarchy giving us the device structure in /dev. (XXX is this a 27219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * safe thing to do?) 27319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 27419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef VG_DIR 27519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic dev_t lvm_get_devno(const char *lvm_device) 27619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 27719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project FILE *lvf; 27819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char buf[1024]; 27919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ma, mi; 28019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev_t ret = 0; 28119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 28219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("opening %s\n", lvm_device)); 28319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if ((lvf = fopen(lvm_device, "r")) == NULL) { 28419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("%s: (%d) %s\n", lvm_device, errno, 28519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project strerror(errno))); 28619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 28719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 28819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 28919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project while (fgets(buf, sizeof(buf), lvf)) { 29019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (sscanf(buf, "device: %d:%d", &ma, &mi) == 2) { 29119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ret = makedev(ma, mi); 29219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project break; 29319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 29419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 29519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fclose(lvf); 29619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 29719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return ret; 29819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 29919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 30019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic void lvm_probe_all(blkid_cache cache, int only_if_new) 30119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 30219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DIR *vg_list; 30319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct dirent *vg_iter; 30419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int vg_len = strlen(VG_DIR); 30519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev_t dev; 30619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 30719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if ((vg_list = opendir(VG_DIR)) == NULL) 30819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return; 30919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("probing LVM devices under %s\n", VG_DIR)); 31119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project while ((vg_iter = readdir(vg_list)) != NULL) { 31319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DIR *lv_list; 31419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char *vdirname; 31519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char *vg_name; 31619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct dirent *lv_iter; 31719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project vg_name = vg_iter->d_name; 31919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!strcmp(vg_name, ".") || !strcmp(vg_name, "..")) 32019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 32119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project vdirname = malloc(vg_len + strlen(vg_name) + 8); 32219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!vdirname) 32319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto exit; 32419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project sprintf(vdirname, "%s/%s/LVs", VG_DIR, vg_name); 32519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 32619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lv_list = opendir(vdirname); 32719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project free(vdirname); 32819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (lv_list == NULL) 32919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 33019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 33119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project while ((lv_iter = readdir(lv_list)) != NULL) { 33219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char *lv_name, *lvm_device; 33319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 33419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lv_name = lv_iter->d_name; 33519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!strcmp(lv_name, ".") || !strcmp(lv_name, "..")) 33619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 33719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 33819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lvm_device = malloc(vg_len + strlen(vg_name) + 33919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project strlen(lv_name) + 8); 34019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!lvm_device) { 34119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project closedir(lv_list); 34219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project goto exit; 34319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 34419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project sprintf(lvm_device, "%s/%s/LVs/%s", VG_DIR, vg_name, 34519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lv_name); 34619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev = lvm_get_devno(lvm_device); 34719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project sprintf(lvm_device, "%s/%s", vg_name, lv_name); 34819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("LVM dev %s: devno 0x%04X\n", 34919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lvm_device, 35019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project (unsigned int) dev)); 3513984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt probe_one(cache, lvm_device, dev, BLKID_PRI_LVM, 35219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project only_if_new); 35319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project free(lvm_device); 35419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 35519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project closedir(lv_list); 35619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 35719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectexit: 35819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project closedir(vg_list); 35919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 36019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 36119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 36219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define PROC_EVMS_VOLUMES "/proc/evms/volumes" 36319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 36419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic int 36519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectevms_probe_all(blkid_cache cache, int only_if_new) 36619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 36719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char line[100]; 36819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ma, mi, sz, num = 0; 36919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project FILE *procpt; 37019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char device[110]; 37119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 37219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project procpt = fopen(PROC_EVMS_VOLUMES, "r"); 37319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!procpt) 37419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 37519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project while (fgets(line, sizeof(line), procpt)) { 37619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (sscanf (line, " %d %d %d %*s %*s %[^\n ]", 37719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project &ma, &mi, &sz, device) != 4) 37819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 37919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 38019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("Checking partition %s (%d, %d)\n", 38119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project device, ma, mi)); 38219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 38319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project probe_one(cache, device, makedev(ma, mi), BLKID_PRI_EVMS, 38419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project only_if_new); 38519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project num++; 38619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 38719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fclose(procpt); 38819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return num; 38919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 39019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 39119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 39219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Read the device data for all available block devices in the system. 39319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 39419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstatic int probe_all(blkid_cache cache, int only_if_new) 39519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 39619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project FILE *proc; 39719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char line[1024]; 39819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char ptname0[128], ptname1[128], *ptname = 0; 39919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char *ptnames[2]; 40019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project dev_t devs[2]; 40119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ma, mi; 40219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project unsigned long long sz; 40319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int lens[2] = { 0, 0 }; 40419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int which = 0, last = 0; 4053984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt struct list_head *p, *pnext; 40619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 40719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ptnames[0] = ptname0; 40819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ptnames[1] = ptname1; 40919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 41019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!cache) 41119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return -BLKID_ERR_PARAM; 41219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 41319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (cache->bic_flags & BLKID_BIC_FL_PROBED && 41419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project time(0) - cache->bic_time < BLKID_PROBE_INTERVAL) 41519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 41619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 41719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_read_cache(cache); 41819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project evms_probe_all(cache, only_if_new); 41919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef VG_DIR 42019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lvm_probe_all(cache, only_if_new); 42119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 42219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 42319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project proc = fopen(PROC_PARTITIONS, "r"); 42419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (!proc) 42519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return -BLKID_ERR_PROC; 42619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 42719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project while (fgets(line, sizeof(line), proc)) { 42819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project last = which; 42919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project which ^= 1; 43019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ptname = ptnames[which]; 43119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (sscanf(line, " %d %d %llu %128[^\n ]", 43319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project &ma, &mi, &sz, ptname) != 4) 43419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project continue; 43519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project devs[which] = makedev(ma, mi); 43619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, printf("read partition name %s\n", ptname)); 43819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* Skip whole disk devs unless they have no partitions. 44019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * If base name of device has changed, also 44119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * check previous dev to see if it didn't have a partn. 44219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * heuristic: partition name ends in a digit, & partition 44319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * names contain whole device name as substring. 44419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 44519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Skip extended partitions. 44619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * heuristic: size is 1 44719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 44819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * FIXME: skip /dev/{ida,cciss,rd} whole-disk devs 44919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 45019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lens[which] = strlen(ptname); 45219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* ends in a digit, clearly a partition, so check */ 45419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (isdigit(ptname[lens[which] - 1])) { 45519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, 45619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project printf("partition dev %s, devno 0x%04X\n", 45719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ptname, (unsigned int) devs[which])); 45819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (sz > 1) 4603984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt probe_one(cache, ptname, devs[which], 0, 46119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project only_if_new); 46219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lens[which] = 0; /* mark as checked */ 46319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 46419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 46519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 4663984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * If last was a whole disk and we just found a partition 4673984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * on it, remove the whole-disk dev from the cache if 4683984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt * it exists. 4693984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt */ 4703984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (lens[last] && !strncmp(ptnames[last], ptname, lens[last])) { 4713984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt list_for_each_safe(p, pnext, &cache->bic_devs) { 4723984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid_dev tmp; 4733984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 4743984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* find blkid dev for the whole-disk devno */ 4753984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt tmp = list_entry(p, struct blkid_struct_dev, 4763984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt bid_devs); 4773984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt if (tmp->bid_devno == devs[last]) { 4783984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt DBG(DEBUG_DEVNAME, 4793984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt printf("freeing %s\n", 4803984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt tmp->bid_name)); 4813984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt blkid_free_dev(tmp); 4823984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt cache->bic_flags |= BLKID_BIC_FL_CHANGED; 4833984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt break; 4843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 4853984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 4863984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt lens[last] = 0; 4873984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt } 4883984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt /* 48919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * If last was not checked because it looked like a whole-disk 49019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * dev, and the device's base name has changed, 49119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * check last as well. 49219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 49319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (lens[last] && strncmp(ptnames[last], ptname, lens[last])) { 49419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_DEVNAME, 49519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project printf("whole dev %s, devno 0x%04X\n", 49619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ptnames[last], (unsigned int) devs[last])); 49719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project probe_one(cache, ptnames[last], devs[last], 0, 49819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project only_if_new); 49919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project lens[last] = 0; 50019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 50119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 50219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 50319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* Handle the last device if it wasn't partitioned */ 50419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (lens[which]) 50519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project probe_one(cache, ptname, devs[which], 0, only_if_new); 50619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 50719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fclose(proc); 50819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_flush_cache(cache); 50919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return 0; 51019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 51119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 51219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectint blkid_probe_all(blkid_cache cache) 51319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 51419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ret; 51519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 51619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_PROBE, printf("Begin blkid_probe_all()\n")); 51719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ret = probe_all(cache, 0); 51819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project cache->bic_time = time(0); 51919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project cache->bic_flags |= BLKID_BIC_FL_PROBED; 52019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_PROBE, printf("End blkid_probe_all()\n")); 52119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return ret; 52219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 52319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 52419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectint blkid_probe_all_new(blkid_cache cache) 52519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 52619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ret; 52719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 52819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_PROBE, printf("Begin blkid_probe_all_new()\n")); 52919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ret = probe_all(cache, 1); 53019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project DBG(DEBUG_PROBE, printf("End blkid_probe_all_new()\n")); 53119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return ret; 53219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 53319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 53419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 53519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef TEST_PROGRAM 53619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectint main(int argc, char **argv) 53719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 53819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_cache cache = NULL; 53919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project int ret; 54019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 54119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_debug_mask = DEBUG_ALL; 54219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (argc != 1) { 54319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fprintf(stderr, "Usage: %s\n" 54419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project "Probe all devices and exit\n", argv[0]); 54519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project exit(1); 54619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 54719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) { 54819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project fprintf(stderr, "%s: error creating cache (%d)\n", 54919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project argv[0], ret); 55019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project exit(1); 55119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } 55219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project if (blkid_probe_all(cache) < 0) 55319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project printf("%s: error probing devices\n", argv[0]); 55419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 55519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project blkid_put_cache(cache); 55619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project return (0); 55719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project} 55819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 559