X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=687a2ce22b887c943b180257c535896485965883;hp=6985a7076204f6b11cf2b617594d968025ca8307;hb=869523878e83586f4e55b00f705378d6e7b11e68;hpb=aabe020dd2465c9a4df6e72f35f7a986bd7c5327 diff --git a/util.c b/util.c index 6985a707..687a2ce2 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. @@ -41,10 +43,10 @@ /* The argument structure */ struct blkpg_ioctl_arg { - int op; - int flags; - int datalen; - void *data; + int op; + int flags; + int datalen; + void *data; }; /* The subfunctions (for the op field) */ @@ -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 @@ -125,21 +127,21 @@ int parse_uuid(char *str, int uuid[4]) int md_get_version(int fd) { - struct stat stb; - mdu_version_t vers; + struct stat stb; + mdu_version_t vers; - if (fstat(fd, &stb)<0) - return -1; - if ((S_IFMT&stb.st_mode) != S_IFBLK) - return -1; + if (fstat(fd, &stb)<0) + return -1; + if ((S_IFMT&stb.st_mode) != S_IFBLK) + return -1; - if (ioctl(fd, RAID_VERSION, &vers) == 0) - return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; - if (errno == EACCES) - return -1; - if (major(stb.st_rdev) == MD_MAJOR) - return (3600); - return -1; + if (ioctl(fd, RAID_VERSION, &vers) == 0) + return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; + if (errno == EACCES) + return -1; + if (major(stb.st_rdev) == MD_MAJOR) + return (3600); + return -1; } int get_linux_version() @@ -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) + * INVALID_SECTORS returned on error. */ char *c; long long s = strtoll(size, &c, 10); @@ -210,10 +213,14 @@ long long parse_size(char *size) c++; s *= 1024 * 1024 * 2; break; + case 's': /* sectors */ + c++; + break; } - } + } else + s = INVALID_SECTORS; if (*c) - s = 0; + s = INVALID_SECTORS; return s; } @@ -241,7 +248,7 @@ 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 +257,17 @@ 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 +284,7 @@ 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 } @@ -309,29 +327,35 @@ 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; + int this = first; while (n--) { - if (avail[first]) + if (avail[this]) cnt++; - first = (first+1) % raid_disks; + this = (this+1) % raid_disks; } if (cnt == 0) return 0; - + first = (first+(layout&255)) % raid_disks; } while (first != 0); return 1; @@ -369,8 +393,8 @@ int enough_fd(int fd) if (ioctl(fd, GET_ARRAY_INFO, &array) != 0 || array.raid_disks <= 0) return 0; - avail = calloc(array.raid_disks, 1); - for (i=0; i < 1024 && array.nr_disks > 0; i++) { + avail = xcalloc(array.raid_disks, 1); + for (i = 0; i < MAX_DISKS && array.nr_disks > 0; i++) { disk.number = i; if (ioctl(fd, GET_DISK_INFO, &disk) != 0) continue; @@ -387,12 +411,11 @@ int enough_fd(int fd) } /* This is used on an active array, so assume it is clean */ rv = enough(array.level, array.raid_disks, array.layout, - 1, avail, avail_disks); + 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) @@ -405,7 +428,7 @@ 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] || @@ -422,6 +445,7 @@ 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) { @@ -432,7 +456,7 @@ 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]; @@ -497,7 +521,7 @@ 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); @@ -555,7 +579,7 @@ 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); @@ -567,7 +591,7 @@ int ask(char *mesg) return 0; add = "(y/n) "; } - fprintf(stderr, Name ": assuming 'no'\n"); + pr_err("assuming 'no'\n"); return 0; } #endif /* MDASSEMBLE */ @@ -582,18 +606,18 @@ 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) @@ -615,13 +639,13 @@ 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); @@ -645,7 +669,7 @@ char *human_size(long long bytes) */ 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; @@ -662,24 +686,49 @@ char *human_size(long long bytes) return buf; } -char *human_size_brief(long long bytes) +char *human_size_brief(long long bytes, int prefix) { static char buf[30]; + /* We convert bytes to either centi-M{ega,ibi}bytes or + * centi-G{igi,ibi}bytes, with appropriate rounding, + * and then print 1/100th of those as a decimal. + * We allow upto 2048Megabytes before converting to + * gigabytes, as that shows more precision and isn't + * too large a number. + * Terabytes are not yet handled. + * + * If prefix == IEC, we mean prefixes like kibi,mebi,gibi etc. + * If prefix == JEDEC, we mean prefixes like kilo,mega,giga etc. + */ + if (bytes < 5000*1024) - snprintf(buf, sizeof(buf), "%ld.%02ldKiB", - (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) - ); - else if (bytes < 2*1024LL*1024LL*1024LL) - snprintf(buf, sizeof(buf), "%ld.%02ldMiB", - (long)(bytes>>20), - (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) - ); + buf[0] = 0; + else if (prefix == IEC) { + if (bytes < 2*1024LL*1024LL*1024LL) { + long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; + snprintf(buf, sizeof(buf), "%ld.%02ldMiB", + cMiB/100 , cMiB % 100); + } else { + long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; + snprintf(buf, sizeof(buf), "%ld.%02ldGiB", + cGiB/100 , cGiB % 100); + } + } + else if (prefix == JEDEC) { + if (bytes < 2*1024LL*1024LL*1024LL) { + long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; + snprintf(buf, sizeof(buf), "%ld.%02ldMB", + cMB/100, cMB % 100); + } else { + long cGB = (bytes / (1000000000LL/200LL ) +1) /2; + snprintf(buf, sizeof(buf), "%ld.%02ldGB", + cGB/100 , cGB % 100); + } + } else - snprintf(buf, sizeof(buf), "%ld.%02ldGiB", - (long)(bytes>>30), - (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) - ); + buf[0] = 0; + return buf; } @@ -704,6 +753,8 @@ 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; } @@ -712,11 +763,15 @@ 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; } @@ -775,7 +830,7 @@ 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); } @@ -786,10 +841,14 @@ 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); @@ -827,7 +886,7 @@ 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); } @@ -835,7 +894,7 @@ 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); } @@ -865,7 +924,7 @@ 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; @@ -903,7 +962,7 @@ 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 && @@ -959,9 +1018,10 @@ 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); @@ -1013,10 +1073,7 @@ 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; @@ -1036,11 +1093,10 @@ 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) @@ -1095,7 +1151,7 @@ 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; } @@ -1158,7 +1214,7 @@ static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) part = (struct GPT_part_entry *)buf; - for (part_nr=0; part_nr < all_partitions; part_nr++) { + 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; @@ -1202,7 +1258,7 @@ 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); @@ -1237,22 +1293,19 @@ 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; } } @@ -1264,7 +1317,7 @@ 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 < 1024 ; d++) { + for (d = 0 ; d < MAX_DISKS ; d++) { if (ioctl(mdfd, GET_DISK_INFO, disk) == 0 && (disk->major || disk->minor)) return; @@ -1378,7 +1431,7 @@ 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 -1; } @@ -1386,51 +1439,49 @@ int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) 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; } @@ -1438,7 +1489,7 @@ 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; } @@ -1482,7 +1533,7 @@ 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; @@ -1585,7 +1636,7 @@ int start_mdmon(int devnum) { int i, skipped; int len; - pid_t pid; + pid_t pid; int status; char pathbuf[1024]; char *paths[4] = { @@ -1615,19 +1666,26 @@ int start_mdmon(int devnum) case 0: /* FIXME yuk. CLOSE_EXEC?? */ skipped = 0; - for (i=3; skipped < 20; i++) + for (i = 3; skipped < 20; i++) if (close(i) < 0) skipped++; else skipped = 0; - for (i=0; paths[i]; i++) - if (paths[i][0]) - execl(paths[i], "mdmon", - devnum2devname(devnum), - NULL); + 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 */ @@ -1691,7 +1749,7 @@ 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; @@ -1713,7 +1771,7 @@ int experimental(void) if (check_env("MDADM_EXPERIMENTAL")) return 1; else { - fprintf(stderr, Name ": To use this feature MDADM_EXPERIMENTAL" + pr_err("To use this feature MDADM_EXPERIMENTAL" " environment variable has to be defined.\n"); return 0; } @@ -1779,3 +1837,24 @@ struct mdinfo *container_choose_spares(struct supertype *st, } return disks; } + +/* Checks if paths point to the same device + * Returns 0 if they do. + * Returns 1 if they don't. + * Returns -1 if something went wrong, + * e.g. paths are empty or the files + * they point to don't exist */ +int compare_paths (char* path1, char* path2) +{ + struct stat st1,st2; + + if (path1 == NULL || path2 == NULL) + return -1; + if (stat(path1,&st1) != 0) + return -1; + if (stat(path2,&st2) != 0) + return -1; + if ((st1.st_ino == st2.st_ino) && (st1.st_dev == st2.st_dev)) + return 0; + return 1; +}