#include "md_p.h"
#include <sys/utsname.h>
#include <ctype.h>
+#include <dirent.h>
/*
* following taken from linux/blkpg.h because they aren't
/* 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
+ * Returns 1 if a partitionable standard,
+ * -1 if non-partitonable,
+ * 0 if not a standard name.
*/
char *d = strrchr(dev, '/');
int type=0;
}
#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)
{
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)
return fd;
}
-struct superswitch *superlist[] = { &super0, &super1, NULL };
+struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL };
+
+#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO)
+
+struct supertype supertype_container_member;
struct supertype *super_by_fd(int fd)
{
int minor;
struct supertype *st = NULL;
struct mdinfo *sra;
- char *verstr = NULL;
+ char *verstr;
char version[20];
int i;
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 (minor == -2 && verstr[0] == '/')
+ st = &supertype_container_member;
+ else
+ for (i = 0; st == NULL && superlist[i] ; i++)
+ st = superlist[i]->match_metadata_desc(verstr);
if (sra)
sysfs_free(sra);
- st->sb = NULL;
+ if (st)
+ st->sb = NULL;
return st;
}
+#endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */
+
struct supertype *dup_super(struct supertype *st)
{
if (!st)
return st;
- if (st->minor_version == -1)
+ 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);
for (i = 0; stnew == NULL && superlist[i] ; i++)
stnew = superlist[i]->match_metadata_desc(verstr);
- stnew->sb = NULL;
+ if (stnew)
+ stnew->sb = NULL;
return stnew;
}
st->ss = NULL;
rv = superlist[bestsuper]->load_super(st, fd, NULL);
if (rv == 0) {
- ss->free_super(st);
+ superlist[bestsuper]->free_super(st);
return st;
}
}
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
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;
+}
+
+char *devnum2devname(int num)
+{
+ char name[100];
+ if (num > 0)
+ sprintf(name, "md%d", num);
+ else
+ sprintf(name, "md_d%d", -1-num);
+ return strdup(name);
+}
+
+int fd2devnum(int fd)
+{
+ struct stat stb;
+ if (fstat(fd, &stb) == 0 &&
+ (S_IFMT&stb.st_mode)==S_IFBLK) {
+ if (major(stb.st_rdev) == MD_MAJOR)
+ return minor(stb.st_rdev);
+ else
+ return -1- (minor(stb.st_rdev)>>6);
+ }
+ return -1;
+}
+
#ifdef __TINYC__
/* tinyc doesn't optimize this check in ioctl.h out ... */
unsigned int __invalid_size_argument_for_IOC = 0;
projects / thirdparty / mdadm.git / blobdiff