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-rw-r--r--include/partx.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/include/partx.h b/include/partx.h
new file mode 100644
index 0000000..618a0a4
--- /dev/null
+++ b/include/partx.h
@@ -0,0 +1,63 @@
+#ifndef UTIL_LINUX_PARTX_H
+#define UTIL_LINUX_PARTX_H
+
+#include <sys/ioctl.h>
+#include <linux/blkpg.h>
+#include <stdint.h>
+
+#ifndef BLKPG_ADD_PARTITION
+# define BLKPG_ADD_PARTITION 1
+#endif
+
+#ifndef BLKPG_DEL_PARTITION
+# define BLKPG_DEL_PARTITION 2
+#endif
+
+#ifndef BLKPG_RESIZE_PARTITION
+# define BLKPG_RESIZE_PARTITION 3 /* since Linux 3.6 */
+#endif
+
+
+#define INIT_BLKPG_PARTITION(_partno, _start, _size) { \
+ .pno = (_partno), \
+ .start = (_start) << 9, \
+ .length = (_size) << 9, \
+ .devname[0] = 0, \
+ .volname[0] = 0 \
+}
+
+#define INIT_BLKPG_ARG(_action, _part) { \
+ .op = (_action), \
+ .flags = 0, \
+ .datalen = sizeof(*(_part)), \
+ .data = (_part) \
+}
+
+
+static inline int partx_del_partition(int fd, unsigned int partno)
+{
+ struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, 0, 0);
+ struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_DEL_PARTITION, &p);
+
+ return ioctl(fd, BLKPG, &a);
+}
+
+static inline int partx_add_partition(int fd, int partno,
+ uint64_t start, uint64_t size)
+{
+ struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
+ struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_ADD_PARTITION, &p);
+
+ return ioctl(fd, BLKPG, &a);
+}
+
+static inline int partx_resize_partition(int fd, int partno,
+ uint64_t start, uint64_t size)
+{
+ struct blkpg_partition p = INIT_BLKPG_PARTITION(partno, start, size);
+ struct blkpg_ioctl_arg a = INIT_BLKPG_ARG(BLKPG_RESIZE_PARTITION, &p);
+
+ return ioctl(fd, BLKPG, &a);
+}
+
+#endif /* UTIL_LINUX_PARTX_H */