diff options
Diffstat (limited to 'cpukit/libfs/src/imfs/deviceio.c')
| -rw-r--r-- | cpukit/libfs/src/imfs/deviceio.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/deviceio.c b/cpukit/libfs/src/imfs/deviceio.c new file mode 100644 index 0000000000..ff6cf2a01e --- /dev/null +++ b/cpukit/libfs/src/imfs/deviceio.c @@ -0,0 +1,233 @@ +/* + * IMFS Device Node Handlers + * + * This file contains the set of handlers used to map operations on + * IMFS device nodes onto calls to the RTEMS Classic API IO Manager. + * + * COPYRIGHT (c) 1989-2008. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems.h> +#include <rtems/libio.h> +#include <rtems/devfs.h> + +#include "imfs.h" + +/* + * device_open + * + * This handler maps an open() operation onto rtems_io_open(). + */ + +int device_open( + rtems_libio_t *iop, + const char *pathname, + uint32_t flag, + uint32_t mode +) +{ + rtems_libio_open_close_args_t args; + rtems_status_code status; + IMFS_jnode_t *the_jnode; + + the_jnode = iop->pathinfo.node_access; + + args.iop = iop; + args.flags = iop->flags; + args.mode = mode; + + status = rtems_io_open( + the_jnode->info.device.major, + the_jnode->info.device.minor, + (void *) &args + ); + + return rtems_deviceio_errno( status ); +} + +/* + * device_close + * + * This handler maps a close() operation onto rtems_io_close(). + */ + +int device_close( + rtems_libio_t *iop +) +{ + rtems_libio_open_close_args_t args; + rtems_status_code status; + IMFS_jnode_t *the_jnode; + + the_jnode = iop->pathinfo.node_access; + + args.iop = iop; + args.flags = 0; + args.mode = 0; + + status = rtems_io_close( + the_jnode->info.device.major, + the_jnode->info.device.minor, + (void *) &args + ); + + IMFS_check_node_remove( the_jnode ); + + return rtems_deviceio_errno( status ); +} + +/* + * device_read + * + * This handler maps a read() operation onto rtems_io_read(). + */ + +ssize_t device_read( + rtems_libio_t *iop, + void *buffer, + size_t count +) +{ + rtems_libio_rw_args_t args; + rtems_status_code status; + IMFS_jnode_t *the_jnode; + + the_jnode = iop->pathinfo.node_access; + + args.iop = iop; + args.offset = iop->offset; + args.buffer = buffer; + args.count = count; + args.flags = iop->flags; + args.bytes_moved = 0; + + status = rtems_io_read( + the_jnode->info.device.major, + the_jnode->info.device.minor, + (void *) &args + ); + + if ( status ) + return rtems_deviceio_errno(status); + + return (ssize_t) args.bytes_moved; +} + +/* + * device_write + * + * This handler maps a write() operation onto rtems_io_write(). + */ + +ssize_t device_write( + rtems_libio_t *iop, + const void *buffer, + size_t count +) +{ + rtems_libio_rw_args_t args; + rtems_status_code status; + IMFS_jnode_t *the_jnode; + + the_jnode = iop->pathinfo.node_access; + + args.iop = iop; + args.offset = iop->offset; + args.buffer = (void *) buffer; + args.count = count; + args.flags = iop->flags; + args.bytes_moved = 0; + + status = rtems_io_write( + the_jnode->info.device.major, + the_jnode->info.device.minor, + (void *) &args + ); + + if ( status ) + return rtems_deviceio_errno(status); + + return (ssize_t) args.bytes_moved; +} + +/* + * device_ioctl + * + * This handler maps an ioctl() operation onto rtems_io_ioctl(). + */ + +int device_ioctl( + rtems_libio_t *iop, + uint32_t command, + void *buffer +) +{ + rtems_libio_ioctl_args_t args; + rtems_status_code status; + IMFS_jnode_t *the_jnode; + + args.iop = iop; + args.command = command; + args.buffer = buffer; + + the_jnode = iop->pathinfo.node_access; + + status = rtems_io_control( + the_jnode->info.device.major, + the_jnode->info.device.minor, + (void *) &args + ); + + if ( status ) + return rtems_deviceio_errno(status); + + return args.ioctl_return; +} + +/* + * device_lseek + * + * This handler eats all lseek() operations and does not create + * an error. It assumes all devices can handle the seek. The + * writes fail. + */ + +rtems_off64_t device_lseek( + rtems_libio_t *iop, + rtems_off64_t offset, + int whence +) +{ + return offset; +} + +/* + * device_stat + * + * The IMFS_stat() is used. + */ + +/* + * device_rmnod + * + * The IMFS_rmnod() is used. + */ + +int device_ftruncate( + rtems_libio_t *iop, + rtems_off64_t length +) +{ + return 0; +} |