X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=2d51de02ba4386ea3fae93a4cd41d7b7e998773b;hp=121ddbb731a28db5a4d890beaab2bf4031a22d01;hb=e4965ef8461b3d0db6e94939f07d814d819f86c2;hpb=b5e64645037e99b5f05c9499b27b422ae60d23a9 diff --git a/util.c b/util.c index 121ddbb7..2d51de02 100644 --- a/util.c +++ b/util.c @@ -1,7 +1,7 @@ /* * mdadm - manage Linux "md" devices aka RAID arrays. * - * Copyright (C) 2001-2002 Neil Brown + * Copyright (C) 2001-2006 Neil Brown * * * This program is free software; you can redistribute it and/or modify @@ -32,6 +32,39 @@ #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 * format is 32 hexx nibbles with options :. separator @@ -40,33 +73,32 @@ */ 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; } @@ -94,12 +126,11 @@ int md_get_version(int fd) return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; if (errno == EACCES) return -1; - if (MAJOR(stb.st_rdev) == MD_MAJOR) + if (major(stb.st_rdev) == MD_MAJOR) return (3600); return -1; } - int get_linux_version() { struct utsname name; @@ -118,10 +149,50 @@ int get_linux_version() return (a*1000000)+(b*1000)+c; } -int enough(int level, int raid_disks, int avail_disks) +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; switch (level) { - case 10: return 1; /* a lie, but it is hard to tell */ + case 10: + /* This is the tricky one - we need to check + * which actual disks are present. + */ + copies = (layout&255)* ((layout>>8) & 255); + first=0; + do { + /* there must be one of the 'copies' form 'first' */ + int n = copies; + int cnt=0; + while (n--) { + if (avail[first]) + cnt++; + first = (first+1) % raid_disks; + } + if (cnt == 0) + return 0; + + } while (first != 0); + return 1; case -4: return avail_disks>= 1; @@ -132,157 +203,68 @@ int enough(int level, int raid_disks, int avail_disks) 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; } } -int same_uuid(int a[4], int b[4]) -{ - if (a[0]==b[0] && - a[1]==b[1] && - a[2]==b[2] && - a[3]==b[3]) - return 1; - return 0; -} - -void uuid_from_super(int uuid[4], mdp_super_t *super) -{ - uuid[0] = super->set_uuid0; - if (super->minor_version >= 90) { - uuid[1] = super->set_uuid1; - uuid[2] = super->set_uuid2; - uuid[3] = super->set_uuid3; - } else { - uuid[1] = 0; - uuid[2] = 0; - uuid[3] = 0; - } -} - -int compare_super(mdp_super_t *first, mdp_super_t *second) -{ - /* - * return: - * 0 same, or first was empty, and second was copied - * 1 second had wrong number - * 2 wrong uuid - * 3 wrong other info - */ - int uuid1[4], uuid2[4]; - if (second->md_magic != MD_SB_MAGIC) - return 1; - if (first-> md_magic != MD_SB_MAGIC) { - memcpy(first, second, sizeof(*first)); - return 0; - } - - uuid_from_super(uuid1, first); - uuid_from_super(uuid2, second); - if (!same_uuid(uuid1, uuid2)) - return 2; - if (first->major_version != second->major_version || - first->minor_version != second->minor_version || - first->patch_version != second->patch_version || - first->gvalid_words != second->gvalid_words || - first->ctime != second->ctime || - first->level != second->level || - first->size != second->size || - first->raid_disks != second->raid_disks ) - return 3; - - return 0; -} - -int load_super(int fd, mdp_super_t *super) +int same_uuid(int a[4], int b[4], int swapuuid) { - /* try to read in the superblock - * - * return - * 0 - success - * 1 - no block size - * 2 - too small - * 3 - no seek - * 4 - no read - * 5 - no magic - * 6 - wrong major version - */ - unsigned long size; - unsigned long long dsize; - unsigned long long offset; - -#ifdef BLKGETSIZE64 - if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) -#endif - { - if (ioctl(fd, BLKGETSIZE, &size)) + 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) { + if (ac[i+0] != bc[i+3] || + ac[i+1] != bc[i+2] || + ac[i+2] != bc[i+1] || + ac[i+3] != bc[i+0]) + return 0; + } + return 1; + } else { + if (a[0]==b[0] && + a[1]==b[1] && + a[2]==b[2] && + a[3]==b[3]) return 1; - else - dsize = size << 9; + return 0; } - - if (dsize < MD_RESERVED_SECTORS*2) - return 2; - - offset = MD_NEW_SIZE_SECTORS(dsize>>9); - - offset *= 512; - - ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ - - if (lseek64(fd, offset, 0)< 0LL) - return 3; - - if (read(fd, super, sizeof(*super)) != sizeof(*super)) - return 4; - - if (super->md_magic != MD_SB_MAGIC) - return 5; - - if (super->major_version != 0) - return 6; - return 0; } - -int store_super(int fd, mdp_super_t *super) +void copy_uuid(void *a, int b[4], int swapuuid) { - unsigned long size; - unsigned long long dsize; - - long long offset; - -#ifdef BLKGETSIZE64 - if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) -#endif - { - if (ioctl(fd, BLKGETSIZE, &size)) - return 1; - else - dsize = ((unsigned long long)size) << 9; - } - - if (dsize < MD_RESERVED_SECTORS*2) - return 2; - - offset = MD_NEW_SIZE_SECTORS(dsize>>9); - - offset *= 512; - - if (lseek64(fd, offset, 0)< 0LL) - return 3; - - if (write(fd, super, sizeof(*super)) != sizeof(*super)) - return 4; - - return 0; + 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) { /* @@ -323,37 +305,43 @@ int check_reiser(int fd, char *name) * */ unsigned char sb[1024]; - int size; + unsigned long size; if (lseek(fd, 64*1024, 0) != 64*1024) return 0; if (read(fd, sb, 1024) != 1024) return 0; - if (strncmp(sb+52, "ReIsErFs",8)!=0 && - strncmp(sb+52, "ReIsEr2Fs",9)!=0) + if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && + strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) return 0; 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 = %dK\n", size*4); - + fprintf(stderr, " size = %luK\n", size*4); + return 1; } int check_raid(int fd, char *name) { - mdp_super_t super; + struct mdinfo info; time_t crtime; - if (load_super(fd, &super)) - return 0; + char *level; + struct supertype *st = guess_super(fd); + + if (!st) return 0; + 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); - crtime = super.ctime; - fprintf(stderr, " level=%d devices=%d ctime=%s", - super.level, super.raid_disks, ctime(&crtime)); + 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-"; + fprintf(stderr, " level=%s devices=%d ctime=%s", + level, info.array.raid_disks, ctime(&crtime)); return 1; } - int ask(char *mesg) { char *add = ""; @@ -373,6 +361,7 @@ int ask(char *mesg) fprintf(stderr, Name ": assuming 'no'\n"); return 0; } +#endif /* MDASSEMBLE */ char *map_num(mapping_t *map, int num) { @@ -395,28 +384,37 @@ int map_name(mapping_t *map, char *name) } -int is_standard(char *dev) +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 */ - dev = strrchr(dev, '/'); - if (!dev) + char *d = strrchr(dev, '/'); + int type=0; + int num; + if (!d) return 0; - if (strncmp(dev, "/d",2)==0) - dev += 2; - else if (strncmp(dev, "/md", 3)==0) - dev += 3; + 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_dNpM */ + 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 (!*dev) + if (!*d) return 0; - while (isdigit(*dev)) - dev++; - if (*dev) + num = atoi(d); + while (isdigit(*d)) + d++; + if (*d) return 0; - return 1; + if (nump) *nump = num; + + return type; } @@ -432,132 +430,202 @@ struct devmap { } *devlist = NULL; int devlist_ready = 0; -#ifdef UCLIBC -char *map_dev(int major, int minor) +int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) { -#if 0 - fprintf(stderr, "Warning - fail to map %d,%d to a device name\n", - major, minor); -#endif - return NULL; -} -#else -#define __USE_XOPEN_EXTENDED -#include + struct stat st; + if (S_ISLNK(stb->st_mode)) { + stat(name, &st); + stb = &st; + } + if ((stb->st_mode&S_IFMT)== S_IFBLK) { + char *n = strdup(name); + struct devmap *dm = malloc(sizeof(*dm)); + if (strncmp(n, "/dev/./", 7)==0) + strcpy(n+4, name+6); + if (dm) { + dm->major = major(stb->st_rdev); + dm->minor = minor(stb->st_rdev); + dm->name = n; + dm->next = devlist; + devlist = dm; + } + } + return 0; +} -#ifndef __dietlibc__ -int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) +#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 add_dev(const char *name, const struct stat *stb, int flag) -#endif +int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) { - if ((stb->st_mode&S_IFMT)== S_IFBLK) { - char *n = strdup(name); - struct devmap *dm = malloc(sizeof(*dm)); - if (dm) { - dm->major = MAJOR(stb->st_rdev); - dm->minor = MINOR(stb->st_rdev); - dm->name = n; - dm->next = devlist; - devlist = dm; - } - } - return 0; + return 0; } +#endif /* HAVE_FTW */ +#endif /* HAVE_NFTW */ /* * Find a block device with the right major/minor number. - * Avoid /dev/mdNN and /dev/md/dNN is possible + * If we find multiple names, choose the shortest. + * If we find a non-standard name, it is probably there + * deliberately so prefer it over a standard name. + * This applies only to names for MD devices. */ -char *map_dev(int major, int minor) +char *map_dev(int major, int minor, int create) { struct devmap *p; - char *std = NULL; + char *std = NULL, *nonstd=NULL; + int did_check = 0; + + if (major == 0 && minor == 0) + return NULL; + + retry: if (!devlist_ready) { -#ifndef __dietlibc__ - nftw("/dev", add_dev, 10, FTW_PHYS); -#else - ftw("/dev", add_dev, 10); -#endif + 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/."; + nftw(dev, add_dev, 10, FTW_PHYS); devlist_ready=1; + did_check = 1; } for (p=devlist; p; p=p->next) if (p->major == major && p->minor == minor) { - if (is_standard(p->name)) - std = p->name; - else - return p->name; + if (is_standard(p->name, NULL)) { + if (std == NULL || + strlen(p->name) < strlen(std)) + std = p->name; + } else { + if (nonstd == NULL || + strlen(p->name) < strlen(nonstd)) + nonstd = p->name; + } } - return std; -} + if (!std && !nonstd && !did_check) { + devlist_ready = 0; + goto retry; + } + if (create && !std && !nonstd) { + static char buf[30]; + snprintf(buf, sizeof(buf), "%d:%d", major, minor); + nonstd = buf; + } -#endif + return nonstd ? nonstd : std; +} -unsigned long calc_sb_csum(mdp_super_t *super) +unsigned long calc_csum(void *super, int bytes) { - unsigned int oldcsum = super->sb_csum; unsigned long long newcsum = 0; - unsigned long csum; int i; - unsigned int *superc = (int*) super; - super->sb_csum = 0; + unsigned int csum; + unsigned int *superc = (unsigned int*) super; - for(i=0; i>32); - super->sb_csum = oldcsum; +#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 + * a way that it shouldn't). + */ + csum = (csum & 0xffff) + (csum >> 16); + csum = (csum & 0xffff) + (csum >> 16); +#endif return csum; } +#ifndef MDASSEMBLE char *human_size(long long bytes) { 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. + * Terrabytes are not yet handled. + */ if (bytes < 5000*1024) buf[0]=0; - else if (bytes < 2*1024LL*1024LL*1024LL) - sprintf(buf, " (%ld.%02ld MiB %ld.%02ld MB)", - (long)(bytes>>20), - (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100), - (long)(bytes/1000/1000), - (long)(((bytes%1000000)+5000)/10000) - ); - else - sprintf(buf, " (%ld.%02ld GiB %ld.%02ld GB)", - (long)(bytes>>30), - (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100), - (long)(bytes/1000LL/1000LL/1000LL), - (long)((((bytes/1000)%1000000)+5000)/10000) - ); + else if (bytes < 2*1024LL*1024LL*1024LL) { + long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; + long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; + snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", + cMiB/100 , cMiB % 100, + cMB/100, cMB % 100); + } else { + long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; + long cGB = (bytes / (1000000000LL/200LL ) +1) /2; + snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", + cGiB/100 , cGiB % 100, + cGB/100, cGB % 100); + } return buf; } char *human_size_brief(long long bytes) { static char buf[30]; - if (bytes < 5000*1024) - sprintf(buf, "%ld.%02ldKiB", + snprintf(buf, sizeof(buf), "%ld.%02ldKiB", (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) ); else if (bytes < 2*1024LL*1024LL*1024LL) - sprintf(buf, "%ld.%02ldMiB", + snprintf(buf, sizeof(buf), "%ld.%02ldMiB", (long)(bytes>>20), (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) ); else - sprintf(buf, "%ld.%02ldGiB", + snprintf(buf, sizeof(buf), "%ld.%02ldGiB", (long)(bytes>>30), (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) ); return buf; } +void print_r10_layout(int layout) +{ + int near = layout & 255; + int far = (layout >> 8) & 255; + int offset = (layout&0x10000); + char *sep = ""; + + if (near != 1) { + printf("%s near=%d", sep, near); + sep = ","; + } + if (far != 1) + printf("%s %s=%d", sep, offset?"offset":"far", far); + if (near*far == 1) + printf("NO REDUNDANCY"); +} +#endif + +#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) int get_mdp_major(void) { static int mdp_major = -1; @@ -600,30 +668,30 @@ char *get_md_name(int dev) if (dev < 0) { int mdp = get_mdp_major(); if (mdp < 0) return NULL; - rdev = MKDEV(mdp, (-1-dev)<<6); - sprintf(devname, "/dev/md/d%d", -1-dev); + rdev = makedev(mdp, (-1-dev)<<6); + snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && (stb.st_rdev == rdev)) return devname; } else { - rdev = MKDEV(MD_MAJOR, dev); - sprintf(devname, "/dev/md%d", dev); + rdev = makedev(MD_MAJOR, dev); + snprintf(devname, sizeof(devname), "/dev/md%d", dev); if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && (stb.st_rdev == rdev)) return devname; - sprintf(devname, "/dev/md/%d", dev); + snprintf(devname, sizeof(devname), "/dev/md/%d", dev); if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && (stb.st_rdev == rdev)) return devname; } - dn = map_dev(MAJOR(rdev), MINOR(rdev)); + dn = map_dev(major(rdev), minor(rdev), 0); if (dn) return dn; - sprintf(devname, "/dev/.tmp.md%d", dev); + snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); if (mknod(devname, S_IFBLK | 0600, rdev) == -1) if (errno != EEXIST) return NULL; @@ -641,3 +709,222 @@ void put_md_name(char *name) if (strncmp(name, "/dev/.tmp.md", 12)==0) 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 + * block device and open that + */ + char *e; + int fd = -1; + char devname[32]; + 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) { + snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d", major, minor); + if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { + fd = open(devname, flags); + unlink(devname); + } + } else + fd = open(dev, flags); + return fd; +} + +struct superswitch *superlist[] = { &super0, &super1, NULL }; + +#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) +struct supertype *super_by_fd(int fd) +{ + 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) { + sprintf(version, "%d.%d", vers, minor); + verstr = version; + } + 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->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) +{ + /* try each load_super to find the best match, + * and return the best superswitch + */ + struct superswitch *ss; + struct supertype *st; + unsigned long besttime = 0; + int bestsuper = -1; + int i; + + st = malloc(sizeof(*st)); + memset(st, 0, sizeof(*st)); + for (i=0 ; superlist[i]; i++) { + int rv; + ss = superlist[i]; + st->ss = NULL; + rv = ss->load_super(st, fd, NULL); + if (rv == 0) { + struct mdinfo info; + st->ss->getinfo_super(st, &info); + if (bestsuper == -1 || + besttime < info.array.ctime) { + bestsuper = i; + besttime = info.array.ctime; + } + ss->free_super(st); + } + } + if (bestsuper != -1) { + int rv; + st->ss = NULL; + rv = superlist[bestsuper]->load_super(st, fd, NULL); + if (rv == 0) { + superlist[bestsuper]->free_super(st); + return st; + } + } + free(st); + 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; +} + +#ifdef __TINYC__ +/* tinyc doesn't optimize this check in ioctl.h out ... */ +unsigned int __invalid_size_argument_for_IOC = 0; +#endif +