X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;ds=sidebyside;f=util.c;h=c63a232c919931063beb51b131e6c036eec695e7;hb=9590cb42766ac0120d2c2e9e766de3c17d67a902;hp=1056ae4a299992ef2957484db61bcefce4868e64;hpb=78c0a3b17fcf6972bfcd10f02a5f4520117281d0;p=thirdparty%2Fmdadm.git diff --git a/util.c b/util.c index 1056ae4a..c63a232c 100644 --- a/util.c +++ b/util.c @@ -1,7 +1,7 @@ /* * mdadm - manage Linux "md" devices aka RAID arrays. * - * Copyright (C) 2001-2009 Neil Brown + * Copyright (C) 2001-2012 Neil Brown * * * This program is free software; you can redistribute it and/or modify @@ -32,6 +32,8 @@ #include #include +int __offroot; + /* * following taken from linux/blkpg.h because they aren't * anywhere else and it isn't safe to #include linux/ * stuff. @@ -87,15 +89,16 @@ int parse_uuid(char *str, int uuid[4]) int hit = 0; /* number of Hex digIT */ int i; char c; - for (i=0; i<4; i++) uuid[i]=0; + for (i = 0; i < 4; i++) + uuid[i] = 0; - while ((c= *str++)) { + while ((c = *str++) != 0) { int n; - if (c>='0' && c<='9') + if (c >= '0' && c <= '9') n = c-'0'; - else if (c>='a' && c <= 'f') + else if (c >= 'a' && c <= 'f') n = 10 + c - 'a'; - else if (c>='A' && c <= 'F') + else if (c >= 'A' && c <= 'F') n = 10 + c - 'A'; else if (strchr(":. -", c)) continue; @@ -112,7 +115,6 @@ int parse_uuid(char *str, int uuid[4]) return 0; } - /* * Get the md version number. * We use the RAID_VERSION ioctl if it is supported @@ -146,16 +148,16 @@ int get_linux_version() { struct utsname name; char *cp; - int a,b,c; + int a = 0, b = 0,c = 0; if (uname(&name) <0) return -1; cp = name.release; a = strtoul(cp, &cp, 10); - if (*cp != '.') return -1; - b = strtoul(cp+1, &cp, 10); - if (*cp != '.') return -1; - c = strtoul(cp+1, NULL, 10); + if (*cp == '.') + b = strtoul(cp+1, &cp, 10); + if (*cp == '.') + c = strtoul(cp+1, &cp, 10); return (a*1000000)+(b*1000)+c; } @@ -186,12 +188,13 @@ int mdadm_version(char *version) return (a*1000000)+(b*1000)+c; } -long long parse_size(char *size) +unsigned long long parse_size(char *size) { /* parse 'size' which should be a number optionally * followed by 'K', 'M', or 'G'. * Without a suffix, K is assumed. * Number returned is in sectors (half-K) + * 0 returned on error. */ char *c; long long s = strtoll(size, &c, 10); @@ -211,7 +214,8 @@ long long parse_size(char *size) s *= 1024 * 1024 * 2; break; } - } + } else + s = 0; if (*c) s = 0; return s; @@ -241,7 +245,7 @@ int parse_layout_faulty(char *layout) { /* Parse the layout string for 'faulty' */ int ln = strcspn(layout, "0123456789"); - char *m = strdup(layout); + char *m = xstrdup(layout); int mode; m[ln] = 0; mode = map_name(faultylayout, m); @@ -250,6 +254,17 @@ int parse_layout_faulty(char *layout) return mode | (atoi(layout+ln)<< ModeShift); } + +long parse_num(char *num) +{ + /* Either return a valid number, or -1 */ + char *c; + long rv = strtol(num, &c, 10); + if (rv < 0 || *c || !num[0]) + return -1; + else + return rv; +} #endif void remove_partitions(int fd) @@ -266,7 +281,7 @@ void remove_partitions(int fd) a.datalen = sizeof(p); a.flags = 0; memset(a.data, 0, a.datalen); - for (p.pno=0; p.pno < 16; p.pno++) + for (p.pno = 0; p.pno < 16; p.pno++) ioctl(fd, BLKPG, &a); #endif } @@ -309,21 +324,26 @@ int test_partition_from_id(dev_t id) return rv; } -int enough(int level, int raid_disks, int layout, int clean, - char *avail, int avail_disks) +int enough(int level, int raid_disks, int layout, int clean, char *avail) { int copies, first; + int i; + int avail_disks = 0; + + for (i = 0; i < raid_disks; i++) + avail_disks += !!avail[i]; + switch (level) { case 10: /* This is the tricky one - we need to check * which actual disks are present. */ copies = (layout&255)* ((layout>>8) & 255); - first=0; + first = 0; do { /* there must be one of the 'copies' form 'first' */ int n = copies; - int cnt=0; + int cnt = 0; while (n--) { if (avail[first]) cnt++; @@ -363,17 +383,21 @@ int enough_fd(int fd) struct mdu_array_info_s array; struct mdu_disk_info_s disk; int avail_disks = 0; - int i; + int i, rv; char *avail; if (ioctl(fd, GET_ARRAY_INFO, &array) != 0 || array.raid_disks <= 0) return 0; - avail = calloc(array.raid_disks, 1); - for (i=0; i 0; i++) { disk.number = i; if (ioctl(fd, GET_DISK_INFO, &disk) != 0) continue; + if (disk.major == 0 && disk.minor == 0) + continue; + array.nr_disks--; + if (! (disk.state & (1<= array.raid_disks) @@ -382,12 +406,12 @@ int enough_fd(int fd) avail[disk.raid_disk] = 1; } /* This is used on an active array, so assume it is clean */ - return enough(array.level, array.raid_disks, array.layout, - 1, - avail, avail_disks); + rv = enough(array.level, array.raid_disks, array.layout, + 1, avail); + free(avail); + return rv; } - const int uuid_zero[4] = { 0, 0, 0, 0 }; int same_uuid(int a[4], int b[4], int swapuuid) @@ -400,7 +424,7 @@ int same_uuid(int a[4], int b[4], int swapuuid) unsigned char *ac = (unsigned char *)a; unsigned char *bc = (unsigned char *)b; int i; - for (i=0; i<16; i+= 4) { + for (i = 0; i < 16; i += 4) { if (ac[i+0] != bc[i+3] || ac[i+1] != bc[i+2] || ac[i+2] != bc[i+1] || @@ -417,6 +441,7 @@ int same_uuid(int a[4], int b[4], int swapuuid) return 0; } } + void copy_uuid(void *a, int b[4], int swapuuid) { if (swapuuid) { @@ -427,7 +452,7 @@ void copy_uuid(void *a, int b[4], int swapuuid) unsigned char *ac = (unsigned char *)a; unsigned char *bc = (unsigned char *)b; int i; - for (i=0; i<16; i+= 4) { + for (i = 0; i < 16; i += 4) { ac[i+0] = bc[i+3]; ac[i+1] = bc[i+2]; ac[i+2] = bc[i+1]; @@ -492,7 +517,7 @@ int check_ext2(int fd, char *name) mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; - fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", + pr_err("%s appears to contain an ext2fs file system\n", name); fprintf(stderr," size=%dK mtime=%s", size*(1<ignore_hw_compat = 1; st->ss->load_super(st, fd, name); /* Looks like a raid array .. */ - fprintf(stderr, Name ": %s appears to be part of a raid array:\n", + pr_err("%s appears to be part of a raid array:\n", name); st->ss->getinfo_super(st, &info, NULL); st->ss->free_super(st); @@ -549,7 +575,7 @@ int ask(char *mesg) { char *add = ""; int i; - for (i=0; i<5; i++) { + for (i = 0; i < 5; i++) { char buf[100]; fprintf(stderr, "%s%s", mesg, add); fflush(stderr); @@ -561,7 +587,7 @@ int ask(char *mesg) return 0; add = "(y/n) "; } - fprintf(stderr, Name ": assuming 'no'\n"); + pr_err("assuming 'no'\n"); return 0; } #endif /* MDASSEMBLE */ @@ -576,18 +602,18 @@ int is_standard(char *dev, int *nump) * 0 if not a standard name. */ char *d = strrchr(dev, '/'); - int type=0; + int type = 0; int num; if (!d) return 0; - if (strncmp(d, "/d",2)==0) - d += 2, type=1; /* /dev/md/dN{pM} */ - else if (strncmp(d, "/md_d", 5)==0) - d += 5, type=1; /* /dev/md_dN{pM} */ - else if (strncmp(d, "/md", 3)==0) - d += 3, type=-1; /* /dev/mdN */ - else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) - d += 1, type=-1; /* /dev/md/N */ + if (strncmp(d, "/d",2) == 0) + d += 2, type = 1; /* /dev/md/dN{pM} */ + else if (strncmp(d, "/md_d", 5) == 0) + d += 5, type = 1; /* /dev/md_dN{pM} */ + else if (strncmp(d, "/md", 3) == 0) + d += 3, type = -1; /* /dev/mdN */ + else if (d-dev > 3 && strncmp(d-2, "md/", 3) == 0) + d += 1, type = -1; /* /dev/md/N */ else return 0; if (!*d) @@ -609,13 +635,13 @@ unsigned long calc_csum(void *super, int bytes) unsigned int csum; unsigned int *superc = (unsigned int*) super; - for(i=0; i>32); #ifdef __alpha__ /* The in-kernel checksum calculation is always 16bit on * the alpha, though it is 32 bit on i386... - * I wonder what it is elsewhere... (it uses and API in + * I wonder what it is elsewhere... (it uses an API in * a way that it shouldn't). */ csum = (csum & 0xffff) + (csum >> 16); @@ -635,11 +661,11 @@ char *human_size(long long bytes) * We allow upto 2048Megabytes before converting to * gigabytes, as that shows more precision and isn't * too large a number. - * Terrabytes are not yet handled. + * Terabytes are not yet handled. */ if (bytes < 5000*1024) - buf[0]=0; + buf[0] = 0; else if (bytes < 2*1024LL*1024LL*1024LL) { long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; @@ -697,19 +723,31 @@ void print_r10_layout(int layout) unsigned long long calc_array_size(int level, int raid_disks, int layout, int chunksize, unsigned long long devsize) +{ + if (level == 1) + return devsize; + devsize &= ~(unsigned long long)((chunksize>>9)-1); + return get_data_disks(level, layout, raid_disks) * devsize; +} + +int get_data_disks(int level, int layout, int raid_disks) { int data_disks = 0; switch (level) { - case 0: data_disks = raid_disks; break; - case 1: data_disks = 1; break; + case 0: data_disks = raid_disks; + break; + case 1: data_disks = 1; + break; case 4: - case 5: data_disks = raid_disks - 1; break; - case 6: data_disks = raid_disks - 2; break; + case 5: data_disks = raid_disks - 1; + break; + case 6: data_disks = raid_disks - 2; + break; case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); break; } - devsize &= ~(unsigned long long)((chunksize>>9)-1); - return data_disks * devsize; + + return data_disks; } #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) @@ -763,7 +801,7 @@ char *get_md_name(int dev) void put_md_name(char *name) { - if (strncmp(name, "/dev/.tmp.md", 12)==0) + if (strncmp(name, "/dev/.tmp.md", 12) == 0) unlink(name); } @@ -774,10 +812,14 @@ int find_free_devnum(int use_partitions) devnum = devnum ? devnum-1 : (1<<20)-1) { char *dn; int _devnum; + char nbuf[50]; _devnum = use_partitions ? (-1-devnum) : devnum; if (mddev_busy(_devnum)) continue; + sprintf(nbuf, "%s%d", use_partitions?"mdp":"md", devnum); + if (!conf_name_is_free(nbuf)) + continue; /* make sure it is new to /dev too, at least as a * non-standard */ dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); @@ -815,7 +857,7 @@ int dev_open(char *dev, int flags) if (fd < 0) { snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", (int)getpid(), major, minor); - if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { + if (mknod(devname, S_IFBLK|0600, makedev(major, minor)) == 0) { fd = open(devname, flags); unlink(devname); } @@ -823,7 +865,7 @@ int dev_open(char *dev, int flags) if (fd < 0) { snprintf(devname, sizeof(devname), "/tmp/.tmp.md.%d:%d:%d", (int)getpid(), major, minor); - if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { + if (mknod(devname, S_IFBLK|0600, makedev(major, minor)) == 0) { fd = open(devname, flags); unlink(devname); } @@ -853,7 +895,7 @@ int open_dev_excl(int devnum) int flags = O_RDWR; sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); - for (i=0 ; i<25 ; i++) { + for (i = 0 ; i < 25 ; i++) { int fd = dev_open(buf, flags|O_EXCL); if (fd >= 0) return fd; @@ -891,7 +933,7 @@ void wait_for(char *dev, int fd) (stb_want.st_mode & S_IFMT) != S_IFBLK) return; - for (i=0 ; i<25 ; i++) { + for (i = 0 ; i < 25 ; i++) { struct stat stb; if (stat(dev, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFBLK && @@ -947,9 +989,10 @@ struct supertype *super_by_fd(int fd, char **subarrayp) char *dev = verstr+1; subarray = strchr(dev, '/'); - if (subarray) + if (subarray) { *subarray++ = '\0'; - subarray = strdup(subarray); + subarray = xstrdup(subarray); + } container = devname2devnum(dev); if (sra) sysfs_free(sra); @@ -1001,10 +1044,7 @@ struct supertype *dup_super(struct supertype *orig) if (!orig) return orig; - st = malloc(sizeof(*st)); - if (!st) - return st; - memset(st, 0, sizeof(*st)); + st = xcalloc(1, sizeof(*st)); st->ss = orig->ss; st->max_devs = orig->max_devs; st->minor_version = orig->minor_version; @@ -1024,11 +1064,10 @@ struct supertype *guess_super_type(int fd, enum guess_types guess_type) int bestsuper = -1; int i; - st = malloc(sizeof(*st)); - memset(st, 0, sizeof(*st)); + st = xcalloc(1, sizeof(*st)); st->container_dev = NoMdDev; - for (i=0 ; superlist[i]; i++) { + for (i = 0 ; superlist[i]; i++) { int rv; ss = superlist[i]; if (guess_type == guess_array && ss->add_to_super == NULL) @@ -1083,7 +1122,7 @@ int get_dev_size(int fd, char *dname, unsigned long long *sizep) ldsize <<= 9; } else { if (dname) - fprintf(stderr, Name ": Cannot get size of %s: %s\b", + pr_err("Cannot get size of %s: %s\b", dname, strerror(errno)); return 0; } @@ -1115,9 +1154,9 @@ int must_be_container(int fd) static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) { struct GPT gpt; - unsigned char buf[512]; unsigned char empty_gpt_entry[16]= {0}; struct GPT_part_entry *part; + char buf[512]; unsigned long long curr_part_end; unsigned all_partitions, entry_size; unsigned part_nr; @@ -1125,8 +1164,9 @@ static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) *endofpart = 0; BUILD_BUG_ON(sizeof(gpt) != 512); - /* read GPT header */ + /* skip protective MBR */ lseek(fd, 512, SEEK_SET); + /* read GPT header */ if (read(fd, &gpt, 512) != 512) return 0; @@ -1140,16 +1180,16 @@ static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) /* sanity checks */ if (all_partitions > 1024 || - entry_size > 512) + entry_size > sizeof(buf)) return -1; - /* read first GPT partition entries */ - if (read(fd, buf, 512) != 512) - return 0; + part = (struct GPT_part_entry *)buf; - part = (struct GPT_part_entry*)buf; + for (part_nr = 0; part_nr < all_partitions; part_nr++) { + /* read partition entry */ + if (read(fd, buf, entry_size) != (ssize_t)entry_size) + return 0; - for (part_nr=0; part_nr < all_partitions; part_nr++) { /* is this valid partition? */ if (memcmp(part->type_guid, empty_gpt_entry, 16) != 0) { /* check the last lba for the current partition */ @@ -1158,13 +1198,6 @@ static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) *endofpart = curr_part_end; } - part = (struct GPT_part_entry*)((unsigned char*)part + entry_size); - - if ((unsigned char *)part >= buf + 512) { - if (read(fd, buf, 512) != 512) - return 0; - part = (struct GPT_part_entry*)buf; - } } return 1; } @@ -1196,7 +1229,7 @@ static int get_last_partition_end(int fd, unsigned long long *endofpart) /* found the correct signature */ part = boot_sect.parts; - for (part_nr=0; part_nr < MBR_PARTITIONS; part_nr++) { + for (part_nr = 0; part_nr < MBR_PARTITIONS; part_nr++) { /* check for GPT type */ if (part->part_type == MBR_GPT_PARTITION_TYPE) { retval = get_gpt_last_partition_end(fd, endofpart); @@ -1231,22 +1264,19 @@ int check_partitions(int fd, char *dname, unsigned long long freesize, /* There appears to be a partition table here */ if (freesize == 0) { /* partitions will not be visible in new device */ - fprintf(stderr, - Name ": partition table exists on %s but will be lost or\n" - " meaningless after creating array\n", - dname); + pr_err("partition table exists on %s but will be lost or\n" + " meaningless after creating array\n", + dname); return 1; } else if (endofpart > freesize) { /* last partition overlaps metadata */ - fprintf(stderr, - Name ": metadata will over-write last partition on %s.\n", - dname); + pr_err("metadata will over-write last partition on %s.\n", + dname); return 1; } else if (size && endofpart > size) { /* partitions will be truncated in new device */ - fprintf(stderr, - Name ": array size is too small to cover all partitions on %s.\n", - dname); + pr_err("array size is too small to cover all partitions on %s.\n", + dname); return 1; } } @@ -1256,10 +1286,13 @@ int check_partitions(int fd, char *dname, unsigned long long freesize, void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) { int d; + ioctl(mdfd, GET_ARRAY_INFO, ainf); - for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++) - if (ioctl(mdfd, GET_DISK_INFO, disk) == 0) + for (d = 0 ; d < MAX_DISKS ; d++) { + if (ioctl(mdfd, GET_DISK_INFO, disk) == 0 && + (disk->major || disk->minor)) return; + } } int open_container(int fd) @@ -1369,59 +1402,57 @@ int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) fd = open(dev, O_RDWR|O_EXCL); if (fd < 0) { if (!quiet) - fprintf(stderr, Name ": Couldn't open %s, aborting\n", + pr_err("Couldn't open %s, aborting\n", dev); - return 2; + return -1; } st->devnum = fd2devnum(fd); if (st->devnum == NoMdDev) { if (!quiet) - fprintf(stderr, - Name ": Failed to determine device number for %s\n", - dev); + pr_err("Failed to determine device number for %s\n", + dev); goto close_fd; } mdi = sysfs_read(fd, st->devnum, GET_VERSION|GET_LEVEL); if (!mdi) { if (!quiet) - fprintf(stderr, Name ": Failed to read sysfs for %s\n", + pr_err("Failed to read sysfs for %s\n", dev); goto close_fd; } if (mdi->array.level != UnSet) { if (!quiet) - fprintf(stderr, Name ": %s is not a container\n", dev); + pr_err("%s is not a container\n", dev); goto free_sysfs; } st->ss = version_to_superswitch(mdi->text_version); if (!st->ss) { if (!quiet) - fprintf(stderr, - Name ": Operation not supported for %s metadata\n", - mdi->text_version); + pr_err("Operation not supported for %s metadata\n", + mdi->text_version); goto free_sysfs; } st->devname = devnum2devname(st->devnum); if (!st->devname) { if (!quiet) - fprintf(stderr, Name ": Failed to allocate device name\n"); + pr_err("Failed to allocate device name\n"); goto free_sysfs; } if (!st->ss->load_container) { if (!quiet) - fprintf(stderr, Name ": %s is not a container\n", dev); + pr_err("%s is not a container\n", dev); goto free_name; } if (st->ss->load_container(st, fd, NULL)) { if (!quiet) - fprintf(stderr, Name ": Failed to load metadata for %s\n", + pr_err("Failed to load metadata for %s\n", dev); goto free_name; } @@ -1429,7 +1460,7 @@ int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) info = st->ss->container_content(st, subarray); if (!info) { if (!quiet) - fprintf(stderr, Name ": Failed to find subarray-%s in %s\n", + pr_err("Failed to find subarray-%s in %s\n", subarray, dev); goto free_super; } @@ -1473,7 +1504,7 @@ int add_disk(int mdfd, struct supertype *st, if (sd2 == info) break; if (sd2 == NULL) { - sd2 = malloc(sizeof(*sd2)); + sd2 = xmalloc(sizeof(*sd2)); *sd2 = *info; sd2->next = sra->devs; sra->devs = sd2; @@ -1574,9 +1605,9 @@ int mdmon_running(int devnum) int start_mdmon(int devnum) { - int i; + int i, skipped; int len; - pid_t pid; + pid_t pid; int status; char pathbuf[1024]; char *paths[4] = { @@ -1589,7 +1620,7 @@ int start_mdmon(int devnum) if (check_env("MDADM_NO_MDMON")) return 0; - len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); + len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)-1); if (len > 0) { char *sl; pathbuf[len] = 0; @@ -1605,15 +1636,27 @@ int start_mdmon(int devnum) switch(fork()) { case 0: /* FIXME yuk. CLOSE_EXEC?? */ - for (i=3; i < 100; i++) - close(i); - for (i=0; paths[i]; i++) - if (paths[i][0]) - execl(paths[i], "mdmon", - devnum2devname(devnum), - NULL); + skipped = 0; + for (i = 3; skipped < 20; i++) + if (close(i) < 0) + skipped++; + else + skipped = 0; + + for (i = 0; paths[i]; i++) + if (paths[i][0]) { + if (__offroot) { + execl(paths[i], "mdmon", "--offroot", + devnum2devname(devnum), + NULL); + } else { + execl(paths[i], "mdmon", + devnum2devname(devnum), + NULL); + } + } exit(1); - case -1: fprintf(stderr, Name ": cannot run mdmon. " + case -1: pr_err("cannot run mdmon. " "Array remains readonly\n"); return -1; default: /* parent - good */ @@ -1677,7 +1720,7 @@ int flush_metadata_updates(struct supertype *st) void append_metadata_update(struct supertype *st, void *buf, int len) { - struct metadata_update *mu = malloc(sizeof(*mu)); + struct metadata_update *mu = xmalloc(sizeof(*mu)); mu->buf = buf; mu->len = len; @@ -1699,7 +1742,8 @@ int experimental(void) if (check_env("MDADM_EXPERIMENTAL")) return 1; else { - fprintf(stderr, Name ": To use this feature MDADM_EXPERIMENTAL enviroment variable has to defined.\n"); + pr_err("To use this feature MDADM_EXPERIMENTAL" + " environment variable has to be defined.\n"); return 0; } }