return (a*1000000)+(b*1000)+c;
}
-int enough(int level, int raid_disks, int avail_disks)
+int enough(int level, int raid_disks, int layout,
+ 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);
+ 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;
}
}
-int same_uuid(int a[4], int b[4])
+int same_uuid(int a[4], int b[4], int swapuuid)
{
- 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)
-{
- /* 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))
- return 1;
- else
- dsize = size << 9;
- }
-
- 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)
-{
- unsigned long size;
- unsigned long long dsize;
-
- 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 = ((unsigned long long)size) << 9;
+ return 0;
}
-
- 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;
-
- fsync(fd);
- return 0;
}
-
-
int check_ext2(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;
+ void *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, &super, 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(&info, super);
+ free(super);
+ 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 = "";
else if (strncmp(d, "/md", 3)==0)
d += 3, type=-1; /* /dev/mdN */
else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0)
- type = -1; /* /dev/md/N */
+ d += 1, type=-1; /* /dev/md/N */
else
return 0;
if (!*d)
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)
{
#if 0
return NULL;
}
#else
-#define __USE_XOPEN_EXTENDED
-#include <ftw.h>
+#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
-#ifndef __dietlibc__
int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
-#else
-int add_dev(const char *name, const struct stat *stb, int flag)
-#endif
{
if ((stb->st_mode&S_IFMT)== S_IFBLK) {
char *n = strdup(name);
struct devmap *dm = malloc(sizeof(*dm));
+ if (strncmp(n, "/dev/.", 6)==0)
+ strcpy(n+4, name+6);
if (dm) {
dm->major = major(stb->st_rdev);
dm->minor = minor(stb->st_rdev);
/*
* Find a block device with the right major/minor number.
- * Avoid /dev/mdNN and /dev/md/dNN if 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)
{
struct devmap *p;
- char *std = NULL;
+ char *std = NULL, *nonstd=NULL;
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;
+ if (lstat(dev, &stb)==0 &&
+ S_ISLNK(stb.st_mode))
+ dev = "/dev/.";
+ nftw(dev, add_dev, 10, FTW_PHYS);
devlist_ready=1;
}
for (p=devlist; p; p=p->next)
if (p->major == major &&
p->minor == minor) {
- if (is_standard(p->name, NULL))
- 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;
+ return nonstd ? nonstd : std;
}
#endif
-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<MD_SB_BYTES/4; i++)
+ for(i=0; i<bytes/4; i++)
newcsum+= superc[i];
csum = (newcsum& 0xffffffff) + (newcsum>>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;
}
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;
}
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)
);
int mdp = get_mdp_major();
if (mdp < 0) return NULL;
rdev = makedev(mdp, (-1-dev)<<6);
- sprintf(devname, "/dev/md/d%d", -1-dev);
+ 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 = makedev(MD_MAJOR, dev);
- 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;
- 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))
dn = map_dev(major(rdev), minor(rdev));
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;
if (strncmp(name, "/dev/.tmp.md", 12)==0)
unlink(name);
}
+
+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 = strtoul(dev, &e, 0);
+ int minor;
+ 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 };
+
+struct supertype *super_by_version(int vers, int minor)
+{
+ struct supertype *st = malloc(sizeof(*st));
+ if (!st) return st;
+ if (vers == 0) {
+ st->ss = &super0;
+ st->max_devs = MD_SB_DISKS;
+ }
+
+ if (vers == 1) {
+ st->ss = &super1;
+ st->max_devs = 384;
+ }
+ st->minor_version = minor;
+ return st;
+}
+
+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;
+
+ void *sbp = NULL;
+ 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, &sbp, NULL);
+ if (rv == 0) {
+ struct mdinfo info;
+ ss->getinfo_super(&info, sbp);
+ if (bestsuper == -1 ||
+ besttime < info.array.ctime) {
+ bestsuper = i;
+ besttime = info.array.ctime;
+ }
+ free(sbp);
+ }
+ }
+ if (bestsuper != -1) {
+ int rv;
+ st->ss = NULL;
+ rv = superlist[bestsuper]->load_super(st, fd, &sbp, NULL);
+ if (rv == 0) {
+ free(sbp);
+ return st;
+ }
+ }
+ free(st);
+ return NULL;
+}
+
+
+#ifdef __TINYC__
+/* tinyc doesn't optimize this check in ioctl.h out ... */
+unsigned int __invalid_size_argument_for_IOC = 0;
+#endif
+
projects / thirdparty / mdadm.git / blobdiff