/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
struct createinfo *ci = conf_get_create_info();
int parts;
char *cname;
- char devname[20];
+ char devname[37];
char devnm[32];
char cbuf[400];
if (chosen == NULL)
/* name *must* be mdXX or md_dXX in this context */
if (num < 0 ||
(strcmp(cname, "md") != 0 && strcmp(cname, "md_d") != 0)) {
- pr_err("%s is an invalid name "
- "for an md device. Try /dev/md/%s\n",
+ pr_err("%s is an invalid name for an md device. Try /dev/md/%s\n",
dev, dev+5);
return -1;
}
* empty.
*/
if (strchr(cname, '/') != NULL) {
- pr_err("%s is an invalid name "
- "for an md device.\n", dev);
+ pr_err("%s is an invalid name for an md device.\n", dev);
return -1;
}
if (cname[0] == 0) {
- pr_err("%s is an invalid name "
- "for an md device (empty!).", dev);
+ pr_err("%s is an invalid name for an md device (empty!).", dev);
return -1;
}
if (num < 0) {
if (name && name[0] == 0)
name = NULL;
if (name && trustworthy == METADATA && use_mdp == 1) {
- pr_err("%s is not allowed for a %s container. "
- "Consider /dev/md%d.\n", dev, name, num);
+ pr_err("%s is not allowed for a %s container. Consider /dev/md%d.\n", dev, name, num);
return -1;
}
if (name && trustworthy == METADATA)
if (n < 0)
devnm[0] = 0;
}
+ if (num >= 0) {
+ int fd;
+ int n = -1;
+ sprintf(devnm, "md%d", num);
+ fd = open("/sys/module/md_mod/parameters/new_array", O_WRONLY);
+ if (fd >= 0) {
+ n = write(fd, devnm, strlen(devnm));
+ close(fd);
+ }
+ if (n < 0)
+ devnm[0] = 0;
+ }
if (devnm[0])
;
else if (num < 0) {
/* need to choose a free number. */
char *_devnm = find_free_devnm(use_mdp);
- if (devnm == NULL) {
+ if (_devnm == NULL) {
pr_err("No avail md devices - aborting\n");
return -1;
}
if (lstat(devname, &stb) == 0) {
/* Must be the correct device, else error */
if ((stb.st_mode&S_IFMT) != S_IFBLK ||
- stb.st_rdev != (dev_t)devnm2devid(devnm)) {
+ stb.st_rdev != devnm2devid(devnm)) {
pr_err("%s exists but looks wrong, please fix\n",
devname);
return -1;
*/
int open_mddev(char *dev, int report_errors)
{
- int mdfd = open(dev, O_RDWR);
- if (mdfd < 0 && errno == EACCES)
- mdfd = open(dev, O_RDONLY);
+ struct mdu_array_info_s array;
+ int mdfd = open(dev, O_RDONLY);
+
if (mdfd < 0) {
if (report_errors)
pr_err("error opening %s: %s\n",
dev, strerror(errno));
return -1;
}
- if (md_get_version(mdfd) <= 0) {
+
+ if (md_get_array_info(mdfd, &array) != 0) {
close(mdfd);
if (report_errors)
- pr_err("%s does not appear to be "
- "an md device\n", dev);
+ pr_err("%s does not appear to be an md device\n", dev);
return -2;
}
+
return mdfd;
}
+
+char *find_free_devnm(int use_partitions)
+{
+ static char devnm[32];
+ int devnum;
+ for (devnum = 127; devnum != 128;
+ devnum = devnum ? devnum-1 : (1<<9)-1) {
+
+ if (use_partitions)
+ sprintf(devnm, "md_d%d", devnum);
+ else
+ sprintf(devnm, "md%d", devnum);
+ if (mddev_busy(devnm))
+ continue;
+ if (!conf_name_is_free(devnm))
+ continue;
+ if (!use_udev()) {
+ /* make sure it is new to /dev too, at least as a
+ * non-standard */
+ dev_t devid = devnm2devid(devnm);
+ if (devid) {
+ char *dn = map_dev(major(devid),
+ minor(devid), 0);
+ if (dn && ! is_standard(dn, NULL))
+ continue;
+ }
+ }
+ break;
+ }
+ if (devnum == 128)
+ return NULL;
+ return devnm;
+}