diff options
Diffstat (limited to 'cpukit/libblock/include/rtems/bdbuf.h')
| -rw-r--r-- | cpukit/libblock/include/rtems/bdbuf.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/cpukit/libblock/include/rtems/bdbuf.h b/cpukit/libblock/include/rtems/bdbuf.h index 05e324c342..8a4631b9db 100644 --- a/cpukit/libblock/include/rtems/bdbuf.h +++ b/cpukit/libblock/include/rtems/bdbuf.h @@ -644,21 +644,31 @@ rtems_bdbuf_purge_dev (rtems_disk_device *dd); /** * @brief Sets the block size of a disk device. * - * This will set the block size derived fields of the disk device. The - * read-ahead state of this device is reset. + * This will set the block size derived fields of the disk device. If + * requested the disk device is synchronized before the block size change + * occurs. Since the cache is unlocked during the synchronization operation + * some tasks may access the disk device in the meantime. This may result in + * loss of data. After the synchronization the disk device is purged to ensure + * a consistent cache state and the block size change occurs. This also resets + * the read-ahead state of this disk device. Due to the purge operation this + * may result in loss of data. * * Before you can use this function, the rtems_bdbuf_init() routine must be * called at least once to initialize the cache, otherwise a fatal error will * occur. * * @param dd [in, out] The disk device. - * @param dd [in] The new block size. + * @param block_size [in] The new block size. + * @param sync [in] If @c true, then synchronize the disk device before the + * block size change. * * @retval RTEMS_SUCCESSFUL Successful operation. * @retval RTEMS_INVALID_NUMBER Invalid block size. */ rtems_status_code -rtems_bdbuf_set_block_size (rtems_disk_device *dd, uint32_t block_size); +rtems_bdbuf_set_block_size (rtems_disk_device *dd, + uint32_t block_size, + bool sync); /** * @brief Returns the block device statistics. |