block_driver Struct Reference
Interface defining routines to access block devices (or to act as a block device). More...
#include <block_driver.hpp>
Public Member Functions | |
| virtual | ~block_driver (void) |
| Empty virtual destructor to enforce derived virtual destructors. | |
| virtual const char * | name (void) const =0 |
| Returns the driver's name. | |
| virtual bool | is (state_flags flags) const =0 |
| Returns whether a specific feature/state (or all) is currently present/active. | |
| virtual const state_flags | state (void) const =0 |
| Returns all feature/state flags at once. | |
| virtual int | reset (void)=0 |
| Resets the driver's state back to defaults as when powering up the machine. | |
| virtual l4_sector_t | sectors (void) const =0 |
| Returns the number of disk sectors the underlying medium (e.g a file) provides. | |
| virtual int | read_sectors (uint8_t *buffer, l4_sector_t sector, l4_sector_t number)=0 |
| Reads (from disk) the specified number of sectors starting at the specified sector (inclusive) into the specified data buffer (which must be big enough). | |
| virtual int | write_sectors (uint8_t *buffer, l4_sector_t sector, l4_sector_t number)=0 |
| Writes (to disk) the specified number of sectors starting at the specified sector (inclusive) from the specified data buffer (which must be big enough). | |
| virtual int | flush_sectors (void)=0 |
| Flushes all currently pending operations. | |
Detailed Description
Interface defining routines to access block devices (or to act as a block device).Member Function Documentation
| virtual int block_driver::reset | ( | void | ) | [pure virtual] |
Resets the driver's state back to defaults as when powering up the machine.
Returns 0 on success. Negative error codes otherwise.
Implemented in block_driver_base, and partition_driver.
Referenced by partition_driver::reset().
| virtual int block_driver::read_sectors | ( | uint8_t * | buffer, | |
| l4_sector_t | sector, | |||
| l4_sector_t | number | |||
| ) | [pure virtual] |
Reads (from disk) the specified number of sectors starting at the specified sector (inclusive) into the specified data buffer (which must be big enough).
Returns 0 on success. Negative error codes otherwise.
Implemented in memory_image, partition_driver, raw_image, and windhoek_driver.
Referenced by partition_driver::read_write_sectors().
| virtual int block_driver::write_sectors | ( | uint8_t * | buffer, | |
| l4_sector_t | sector, | |||
| l4_sector_t | number | |||
| ) | [pure virtual] |
Writes (to disk) the specified number of sectors starting at the specified sector (inclusive) from the specified data buffer (which must be big enough).
Returns 0 on success. Negative error codes otherwise.
Implemented in memory_image, partition_driver, raw_image, and windhoek_driver.
Referenced by partition_driver::read_write_sectors().
| virtual int block_driver::flush_sectors | ( | void | ) | [pure virtual] |
Flushes all currently pending operations.
That is requests to write to the backend, if the driver provides some mechanism to cache blocks. Returns 0 on success. Negative error codes otherwise.
Implemented in block_driver_base, partition_driver, and raw_image.
Referenced by partition_driver::flush_sectors().
The documentation for this struct was generated from the following file: