#include "md_p.h"
#include <sys/utsname.h>
#include <ctype.h>
+#include <dirent.h>
/*
* following taken from linux/blkpg.h because they aren't
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, NULL };
+#if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO)
struct supertype *super_by_fd(int fd)
{
mdu_array_info_t array;
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;
}
return;
}
-static int dev2major(int d)
+int open_container(int fd)
{
- 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;
-}
+ /* '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;
-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;
+ 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);
- _devnum = use_partitions ? (-1-devnum) : devnum;
- if (mddev_busy(_devnum))
+ dir = opendir(path);
+ if (!dir)
+ return -1;
+ while ((de = readdir(dir))) {
+ if (de->d_ino == 0)
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))
+ if (de->d_name[0] == '.')
continue;
- break;
+ 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;
+ }
}
- if (devnum == 128)
- return NoMdDev;
- return use_partitions ? (-1-devnum) : devnum;
+ return -1;
}
-
#ifdef __TINYC__
/* tinyc doesn't optimize this check in ioctl.h out ... */
unsigned int __invalid_size_argument_for_IOC = 0;