src/shared/blockdev-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <sys/types.h>
   5
   6 #include "sd-device.h"
   7
   8 #include "macro.h"
   9 #include "stdio-util.h"
  10 #include "string-util.h"
  11
  12 #define SYS_BLOCK_PATH_MAX(suffix)                                      \
  13         (STRLEN("/sys/dev/block/") + DECIMAL_STR_MAX(dev_t) + 1 + DECIMAL_STR_MAX(dev_t) + strlen_ptr(suffix))
  14 #define xsprintf_sys_block_path(buf, suffix, devno)                     \
  15         xsprintf(buf, "/sys/dev/block/%u:%u%s", major(devno), minor(devno), strempty(suffix))
  16
  17 typedef enum BlockDeviceLookupFlag {
  18         BLOCK_DEVICE_LOOKUP_WHOLE_DISK  = 1 << 0, /* whole block device, e.g. sda, nvme0n1, or loop0. */
  19         BLOCK_DEVICE_LOOKUP_BACKING     = 1 << 1, /* fd may be regular file or directory on file system, in
  20                                                    * which case backing block device is determined. */
  21         BLOCK_DEVICE_LOOKUP_ORIGINATING = 1 << 2, /* Try to find the underlying layer device for stacked
  22                                                    * block device, e.g. LUKS-style DM. */
  23 } BlockDeviceLookupFlag;
  24
  25 int block_device_new_from_fd(int fd, BlockDeviceLookupFlag flag, sd_device **ret);
  26 int block_device_new_from_path(const char *path, BlockDeviceLookupFlag flag, sd_device **ret);
  27
  28 int block_device_is_whole_disk(sd_device *dev);
  29 int block_device_get_whole_disk(sd_device *dev, sd_device **ret);
  30
  31 int block_get_whole_disk(dev_t d, dev_t *ret);
  32 int block_get_originating(dev_t d, dev_t *ret);
  33
  34 int get_block_device_fd(int fd, dev_t *ret);
  35 int get_block_device(const char *path, dev_t *dev);
  36
  37 int get_block_device_harder_fd(int fd, dev_t *dev);
  38 int get_block_device_harder(const char *path, dev_t *dev);
  39
  40 int lock_whole_block_device(dev_t devt, int operation);
  41
  42 int blockdev_partscan_enabled(int fd);
  43
  44 int fd_is_encrypted(int fd);
  45 int path_is_encrypted(const char *path);
  46
  47 int fd_get_whole_disk(int fd, bool backing, dev_t *ret);
  48 int path_get_whole_disk(const char *path, bool backing, dev_t *ret);
  49
  50 int block_device_add_partition(int fd, const char *name, int nr, uint64_t start, uint64_t size);
  51 int block_device_remove_partition(int fd, const char *name, int nr);
  52 int block_device_resize_partition(int fd, int nr, uint64_t start, uint64_t size);
  53 int partition_enumerator_new(sd_device *dev, sd_device_enumerator **ret);
  54 int block_device_remove_all_partitions(sd_device *dev, int fd);
  55 int block_device_has_partitions(sd_device *dev);
  56 int blockdev_reread_partition_table(sd_device *dev);
  57
  58 int blockdev_get_sector_size(int fd, uint32_t *ret);