diff options
Diffstat (limited to 'util.c')
| -rw-r--r-- | util.c | 51 |
1 files changed, 17 insertions, 34 deletions
@@ -968,47 +968,30 @@ dev_t devnm2devid(char *devnm) return 0; } +/** + * get_md_name() - Get main dev node of the md device. + * @devnm: Md device name or path. + * + * Function checks if the full name was passed and returns md name + * if it is the MD device. + * + * Return: Main dev node of the md device or NULL if not found. + */ char *get_md_name(char *devnm) { - /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ - /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ - - static char devname[50]; + static char devname[NAME_MAX]; struct stat stb; - dev_t rdev = devnm2devid(devnm); - char *dn; - if (rdev == 0) - return 0; - if (strncmp(devnm, "md_", 3) == 0) { - snprintf(devname, sizeof(devname), "/dev/md/%s", - devnm + 3); - if (stat(devname, &stb) == 0 && - (S_IFMT&stb.st_mode) == S_IFBLK && (stb.st_rdev == rdev)) - return devname; - } - snprintf(devname, sizeof(devname), "/dev/%s", devnm); - if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && - (stb.st_rdev == rdev)) - return devname; + if (strncmp(devnm, "/dev/", 5) == 0) + snprintf(devname, sizeof(devname), "%s", devnm); + else + snprintf(devname, sizeof(devname), "/dev/%s", devnm); - snprintf(devname, sizeof(devname), "/dev/md/%s", devnm+2); - if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && - (stb.st_rdev == rdev)) + if (!is_mddev(devname)) + return NULL; + if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK) return devname; - dn = map_dev(major(rdev), minor(rdev), 0); - if (dn) - return dn; - snprintf(devname, sizeof(devname), "/dev/.tmp.%s", devnm); - if (mknod(devname, S_IFBLK | 0600, rdev) == -1) - if (errno != EEXIST) - return NULL; - - if (stat(devname, &stb) == 0 && (S_IFMT&stb.st_mode) == S_IFBLK && - (stb.st_rdev == rdev)) - return devname; - unlink(devname); return NULL; } |