X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=3838b6e5218eb2131df917388ee5f2305b8d4243;hp=279bfd77287c69b121667165f8608fa7a09fa1e9;hb=5f8097beb973842287e5ac6e2d2644accb04cf25;hpb=382245c31fb3bad644fcd7d1fe51242304ba594b diff --git a/util.c b/util.c index 279bfd77..3838b6e5 100644 --- a/util.c +++ b/util.c @@ -31,6 +31,40 @@ #include "md_p.h" #include #include +#include + +/* + * following taken from linux/blkpg.h because they aren't + * anywhere else and it isn't safe to #include linux/ * stuff. + */ + +#define BLKPG _IO(0x12,105) + +/* The argument structure */ +struct blkpg_ioctl_arg { + int op; + int flags; + int datalen; + void *data; +}; + +/* The subfunctions (for the op field) */ +#define BLKPG_ADD_PARTITION 1 +#define BLKPG_DEL_PARTITION 2 + +/* Sizes of name fields. Unused at present. */ +#define BLKPG_DEVNAMELTH 64 +#define BLKPG_VOLNAMELTH 64 + +/* The data structure for ADD_PARTITION and DEL_PARTITION */ +struct blkpg_partition { + long long start; /* starting offset in bytes */ + long long length; /* length in bytes */ + int pno; /* partition number */ + char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2, + to be used in kernel messages */ + char volname[BLKPG_VOLNAMELTH]; /* volume label */ +}; /* * Parse a 128 bit uuid in 4 integers @@ -40,33 +74,32 @@ */ 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; - - while ((c= *str++)) { - int n; - if (c>='0' && c<='9') - n = c-'0'; - else if (c>='a' && c <= 'f') - n = 10 + c - 'a'; - else if (c>='A' && c <= 'F') - n = 10 + c - 'A'; - else if (strchr(":. -", c)) - continue; - else return 0; - - if (hit<32) { - uuid[hit/8] <<= 4; - uuid[hit/8] += n; + int hit = 0; /* number of Hex digIT */ + int i; + char c; + for (i=0; i<4; i++) uuid[i]=0; + + while ((c= *str++)) { + int n; + if (c>='0' && c<='9') + n = c-'0'; + else if (c>='a' && c <= 'f') + n = 10 + c - 'a'; + else if (c>='A' && c <= 'F') + n = 10 + c - 'A'; + else if (strchr(":. -", c)) + continue; + else return 0; + + if (hit<32) { + uuid[hit/8] <<= 4; + uuid[hit/8] += n; + } + hit++; } - hit++; - } - if (hit == 32) - return 1; - return 0; - + if (hit == 32) + return 1; + return 0; } @@ -99,7 +132,6 @@ int md_get_version(int fd) return -1; } - int get_linux_version() { struct utsname name; @@ -118,7 +150,26 @@ int get_linux_version() return (a*1000000)+(b*1000)+c; } -int enough(int level, int raid_disks, int layout, +void remove_partitions(int fd) +{ + /* remove partitions from this block devices. + * This is used for components added to an array + */ +#ifdef BLKPG_DEL_PARTITION + struct blkpg_ioctl_arg a; + struct blkpg_partition p; + + a.op = BLKPG_DEL_PARTITION; + a.data = (void*)&p; + a.datalen = sizeof(p); + a.flags = 0; + memset(a.data, 0, a.datalen); + for (p.pno=0; p.pno < 16; p.pno++) + ioctl(fd, BLKPG, &a); +#endif +} + +int enough(int level, int raid_disks, int layout, int clean, char *avail, int avail_disks) { int copies, first; @@ -127,7 +178,7 @@ int enough(int level, int raid_disks, int layout, /* This is the tricky one - we need to check * which actual disks are present. */ - copies = (layout&255)* (layout>>8); + copies = (layout&255)* ((layout>>8) & 255); first=0; do { /* there must be one of the 'copies' form 'first' */ @@ -153,9 +204,15 @@ int enough(int level, int raid_disks, int layout, return avail_disks >= 1; case 4: case 5: - return avail_disks >= raid_disks-1; + if (clean) + return avail_disks >= raid_disks-1; + else + return avail_disks >= raid_disks; case 6: - return avail_disks >= raid_disks-2; + if (clean) + return avail_disks >= raid_disks-2; + else + return avail_disks >= raid_disks; default: return 0; } @@ -166,7 +223,7 @@ int same_uuid(int a[4], int b[4], int swapuuid) if (swapuuid) { /* parse uuids are hostendian. * uuid's from some superblocks are big-ending - * if there is a difference, we need to swap.. + * if there is a difference, we need to swap.. */ unsigned char *ac = (unsigned char *)a; unsigned char *bc = (unsigned char *)b; @@ -188,7 +245,27 @@ 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) { + /* parse uuids are hostendian. + * uuid's from some superblocks are big-ending + * if there is a difference, we need to swap.. + */ + unsigned char *ac = (unsigned char *)a; + unsigned char *bc = (unsigned char *)b; + int i; + 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]; + ac[i+3] = bc[i+0]; + } + } else + memcpy(a, b, 16); +} +#ifndef MDASSEMBLE int check_ext2(int fd, char *name) { /* @@ -240,25 +317,24 @@ int check_reiser(int fd, char *name) fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; fprintf(stderr, " size = %luK\n", size*4); - + return 1; } int check_raid(int fd, char *name) { - void *super; struct mdinfo info; time_t crtime; char *level; struct supertype *st = guess_super(fd); if (!st) return 0; - st->ss->load_super(st, fd, &super, name); + 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", name); - st->ss->getinfo_super(&info, super); - free(super); + st->ss->getinfo_super(st, &info); + st->ss->free_super(st); crtime = info.array.ctime; level = map_num(pers, info.array.level); if (!level) level = "-unknown-"; @@ -286,6 +362,7 @@ int ask(char *mesg) fprintf(stderr, Name ": assuming 'no'\n"); return 0; } +#endif /* MDASSEMBLE */ char *map_num(mapping_t *map, int num) { @@ -312,7 +389,7 @@ int is_standard(char *dev, int *nump) { /* tests if dev is a "standard" md dev name. * i.e if the last component is "/dNN" or "/mdNN", - * where NN is a string of digits + * where NN is a string of digits */ char *d = strrchr(dev, '/'); int type=0; @@ -354,31 +431,6 @@ struct devmap { } *devlist = NULL; int devlist_ready = 0; -#ifdef UCLIBC -int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) -{ -} -char *map_dev(int major, int minor, int create) -{ -#if 0 - fprintf(stderr, "Warning - fail to map %d,%d to a device name\n", - major, minor); -#endif - return NULL; -} -#else - -#ifdef __dietlibc__ -int add_dev_1(const char *name, const struct stat *stb, int flag) -{ - return add_dev(name, stb, flag, NULL); -} -int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) -{ - ftw(path, add_dev_1, nopenfd); -} -#endif - int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) { struct stat st; @@ -403,6 +455,24 @@ int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) return 0; } +#ifndef HAVE_NFTW +#ifdef HAVE_FTW +int add_dev_1(const char *name, const struct stat *stb, int flag) +{ + return add_dev(name, stb, flag, NULL); +} +int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) +{ + return ftw(path, add_dev_1, nopenfd); +} +#else +int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) +{ + return 0; +} +#endif /* HAVE_FTW */ +#endif /* HAVE_NFTW */ + /* * Find a block device with the right major/minor number. * If we find multiple names, choose the shortest. @@ -415,10 +485,20 @@ char *map_dev(int major, int minor, int create) struct devmap *p; char *std = NULL, *nonstd=NULL; int did_check = 0; + + if (major == 0 && minor == 0) + return NULL; + retry: if (!devlist_ready) { char *dev = "/dev"; struct stat stb; + while(devlist) { + struct devmap *d = devlist; + devlist = d->next; + free(d->name); + free(d); + } if (lstat(dev, &stb)==0 && S_ISLNK(stb.st_mode)) dev = "/dev/."; @@ -453,8 +533,6 @@ char *map_dev(int major, int minor, int create) return nonstd ? nonstd : std; } -#endif - unsigned long calc_csum(void *super, int bytes) { unsigned long long newcsum = 0; @@ -466,7 +544,7 @@ unsigned long calc_csum(void *super, int bytes) newcsum+= superc[i]; csum = (newcsum& 0xffffffff) + (newcsum>>32); #ifdef __alpha__ -/* The in-kernel checksum calculation is always 16bit on +/* 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 * a way that it shouldn't). @@ -477,6 +555,7 @@ unsigned long calc_csum(void *super, int bytes) return csum; } +#ifndef MDASSEMBLE char *human_size(long long bytes) { static char buf[30]; @@ -511,7 +590,6 @@ char *human_size(long long bytes) char *human_size_brief(long long bytes) { static char buf[30]; - if (bytes < 5000*1024) snprintf(buf, sizeof(buf), "%ld.%02ldKiB", @@ -529,7 +607,26 @@ char *human_size_brief(long long bytes) ); return buf; } +#endif + +unsigned long long calc_array_size(int level, int raid_disks, int layout, + int chunksize, unsigned long long devsize) +{ + int data_disks = 0; + switch (level) { + 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 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); + break; + } + devsize &= ~(unsigned long long)((chunksize>>9)-1); + return data_disks * devsize; +} +#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) int get_mdp_major(void) { static int mdp_major = -1; @@ -614,6 +711,45 @@ void put_md_name(char *name) unlink(name); } +static int dev2major(int d) +{ + if (d >= 0) + return MD_MAJOR; + else + return get_mdp_major(); +} + +static int dev2minor(int d) +{ + if (d >= 0) + return d; + return (-1-d) << MdpMinorShift; +} + +int find_free_devnum(int use_partitions) +{ + int devnum; + for (devnum = 127; devnum != 128; + devnum = devnum ? devnum-1 : (1<<22)-1) { + char *dn; + int _devnum; + + _devnum = use_partitions ? (-1-devnum) : devnum; + if (mddev_busy(_devnum)) + continue; + /* make sure it is new to /dev too, at least as a + * non-standard */ + dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); + if (dn && ! is_standard(dn, NULL)) + continue; + break; + } + if (devnum == 128) + return NoMdDev; + return use_partitions ? (-1-devnum) : devnum; +} +#endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ + int dev_open(char *dev, int flags) { /* like 'open', but if 'dev' matches %d:%d, create a temp @@ -622,8 +758,12 @@ int dev_open(char *dev, int flags) char *e; int fd = -1; char devname[32]; - int major = strtoul(dev, &e, 0); + int major; int minor; + + if (!dev) return -1; + + major = strtoul(dev, &e, 0); if (e > dev && *e == ':' && e[1] && (minor = strtoul(e+1, &e, 0)) >= 0 && *e == 0) { @@ -637,24 +777,75 @@ int dev_open(char *dev, int flags) return fd; } -struct superswitch *superlist[] = { &super0, &super1, NULL }; +struct superswitch *superlist[] = { &super0, &super1, &super_ddf, NULL }; -struct supertype *super_by_version(int vers, int minor) +#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) +struct supertype *super_by_fd(int fd) { - struct supertype *st = malloc(sizeof(*st)); - if (!st) return st; - if (vers == 0) { - st->ss = &super0; - st->max_devs = MD_SB_DISKS; + mdu_array_info_t array; + int vers; + int minor; + struct supertype *st = NULL; + struct mdinfo *sra; + char *verstr; + char version[20]; + int i; + + sra = sysfs_read(fd, 0, GET_VERSION); + + if (sra) { + vers = sra->array.major_version; + minor = sra->array.minor_version; + verstr = sra->text_version; + } else { + if (ioctl(fd, GET_ARRAY_INFO, &array)) + array.major_version = array.minor_version = 0; + vers = array.major_version; + minor = array.minor_version; + verstr = ""; } - if (vers == 1) { - st->ss = &super1; - st->max_devs = 384; + if (vers != -1) { + sprintf(version, "%d.%d", vers, minor); + verstr = version; } - st->minor_version = minor; + for (i = 0; st == NULL && superlist[i] ; i++) + st = superlist[i]->match_metadata_desc(verstr); + + if (sra) + sysfs_free(sra); + if (st) + st->sb = NULL; return st; } +#endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ + + +struct supertype *dup_super(struct supertype *st) +{ + struct supertype *stnew = NULL; + char *verstr = NULL; + char version[20]; + int i; + + if (!st) + return st; + + if (st->ss->text_version) + strcpy(version, st->ss->text_version); + else if (st->minor_version == -1) + sprintf(version, "%d", st->ss->major); + else + sprintf(version, "%d.%d", st->ss->major, st->minor_version); + verstr = version; + + for (i = 0; stnew == NULL && superlist[i] ; i++) + stnew = superlist[i]->match_metadata_desc(verstr); + + if (stnew) + stnew->sb = NULL; + return stnew; +} struct supertype *guess_super(int fd) { @@ -665,8 +856,6 @@ struct supertype *guess_super(int fd) struct supertype *st; unsigned long besttime = 0; int bestsuper = -1; - - void *sbp = NULL; int i; st = malloc(sizeof(*st)); @@ -675,24 +864,24 @@ struct supertype *guess_super(int fd) int rv; ss = superlist[i]; st->ss = NULL; - rv = ss->load_super(st, fd, &sbp, NULL); + rv = ss->load_super(st, fd, NULL); if (rv == 0) { struct mdinfo info; - ss->getinfo_super(&info, sbp); + st->ss->getinfo_super(st, &info); if (bestsuper == -1 || besttime < info.array.ctime) { bestsuper = i; besttime = info.array.ctime; } - free(sbp); + ss->free_super(st); } } if (bestsuper != -1) { int rv; st->ss = NULL; - rv = superlist[bestsuper]->load_super(st, fd, &sbp, NULL); + rv = superlist[bestsuper]->load_super(st, fd, NULL); if (rv == 0) { - free(sbp); + superlist[bestsuper]->free_super(st); return st; } } @@ -700,6 +889,91 @@ struct supertype *guess_super(int fd) return NULL; } +/* Return size of device in bytes */ +int get_dev_size(int fd, char *dname, unsigned long long *sizep) +{ + unsigned long long ldsize; + struct stat st; + + if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) + ldsize = (unsigned long long)st.st_size; + else +#ifdef BLKGETSIZE64 + if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) +#endif + { + unsigned long dsize; + if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { + ldsize = dsize; + ldsize <<= 9; + } else { + if (dname) + fprintf(stderr, Name ": Cannot get size of %s: %s\b", + dname, strerror(errno)); + return 0; + } + } + *sizep = ldsize; + return 1; +} + +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) + return; +} + +int open_container(int fd) +{ + /* 'fd' is a block device. Find out if it is in use + * by a container, and return an open fd on that container. + */ + char path[256]; + char *e; + DIR *dir; + struct dirent *de; + int dfd, n; + char buf[200]; + int major, minor; + struct stat st; + + if (fstat(fd, &st) != 0) + return -1; + sprintf(path, "/sys/dev/block/%d:%d/holders", + (int)major(st.st_rdev), (int)minor(st.st_rdev)); + e = path + strlen(path); + + dir = opendir(path); + if (!dir) + return -1; + while ((de = readdir(dir))) { + if (de->d_ino == 0) + continue; + if (de->d_name[0] == '.') + continue; + sprintf(e, "/%s/dev", de->d_name); + dfd = open(path, O_RDONLY); + if (dfd < 0) + continue; + n = read(dfd, buf, sizeof(buf)); + close(dfd); + if (n <= 0 || n >= sizeof(buf)) + continue; + buf[n] = 0; + if (sscanf(buf, "%d:%d", &major, &minor) != 2) + continue; + sprintf(buf, "%d:%d", major, minor); + dfd = dev_open(buf, O_RDONLY); + if (dfd >= 0) { + closedir(dir); + return dfd; + } + } + return -1; +} #ifdef __TINYC__ /* tinyc doesn't optimize this check in ioctl.h out ... */