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Make seek information part of the xfer metadata, rather than an entirely

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separate xfer method.

Add missing .alloc_iob entries to several xfer_interface_operations
structures.
This commit is contained in:
Michael Brown
2008-01-08 16:46:55 +00:00
parent 74fd544101
commit f6a8158eed
18 changed files with 83 additions and 165 deletions
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37
src/core/posix_io.c
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@@ -103,39 +103,12 @@ static void posix_file_xfer_close ( struct xfer_interface *xfer, int rc ) {
posix_file_finished ( file, rc );
}
/**
* Handle seek() event
*
* @v xfer POSIX file data transfer interface
* @v pos New position
* @ret rc Return status code
*/
static int posix_file_xfer_seek ( struct xfer_interface *xfer, off_t offset,
int whence ) {
struct posix_file *file =
container_of ( xfer, struct posix_file, xfer );
switch ( whence ) {
case SEEK_SET:
file->pos = offset;
break;
case SEEK_CUR:
file->pos += offset;
break;
}
if ( file->filesize < file->pos )
file->filesize = file->pos;
return 0;
}
/**
* Handle deliver_iob() event
*
* @v xfer POSIX file data transfer interface
* @v iobuf I/O buffer
* @v meta Data transfer metadata, or NULL
* @v meta Data transfer metadata
* @ret rc Return status code
*/
static int
@@ -145,6 +118,13 @@ posix_file_xfer_deliver_iob ( struct xfer_interface *xfer,
struct posix_file *file =
container_of ( xfer, struct posix_file, xfer );
/* Keep track of file position solely for the filesize */
if ( meta->whence != SEEK_CUR )
file->pos = 0;
file->pos += meta->offset;
if ( file->filesize < file->pos )
file->filesize = file->pos;
list_add_tail ( &iobuf->list, &file->data );
return 0;
}
@@ -153,7 +133,6 @@ posix_file_xfer_deliver_iob ( struct xfer_interface *xfer,
static struct xfer_interface_operations posix_file_xfer_operations = {
.close = posix_file_xfer_close,
.vredirect = xfer_vopen,
.seek = posix_file_xfer_seek,
.window = unlimited_xfer_window,
.alloc_iob = default_xfer_alloc_iob,
.deliver_iob = posix_file_xfer_deliver_iob,