diff options
-rw-r--r-- | mdadm.h | 1 | ||||
-rw-r--r-- | util.c | 16 |
2 files changed, 17 insertions, 0 deletions
@@ -747,6 +747,7 @@ static inline struct supertype *guess_super(int fd) { extern struct supertype *dup_super(struct supertype *st); extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); extern int must_be_container(int fd); +extern int dev_size_from_id(unsigned id, unsigned long long *size); extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk); void wait_for(char *dev, int fd); @@ -1094,6 +1094,22 @@ struct supertype *super_by_fd(int fd, char **subarrayp) } #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ +int dev_size_from_id(unsigned int id, unsigned long long *size) +{ + char buf[20]; + int fd; + + sprintf(buf, "%d:%d", major(id), minor(id)); + fd = dev_open(buf, O_RDONLY); + if (fd < 0) + return 0; + if (get_dev_size(fd, NULL, size)) { + close(fd); + return 1; + } + close(fd); + return 0; +} struct supertype *dup_super(struct supertype *orig) { |