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Diffstat (limited to 'xlators/storage/bd/src/bd-aio.h')
| -rw-r--r-- | xlators/storage/bd/src/bd-aio.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/xlators/storage/bd/src/bd-aio.h b/xlators/storage/bd/src/bd-aio.h new file mode 100644 index 000000000..16f686a4c --- /dev/null +++ b/xlators/storage/bd/src/bd-aio.h @@ -0,0 +1,41 @@ +/* + Copyright IBM, Corp. 2013 + + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ +#ifndef _BD_AIO_H +#define _BD_AIO_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "xlator.h" +#include "glusterfs.h" + +/* + * Maximum number of concurrently submitted IO events. The heaviest load + * GlusterFS has been able to handle had 60-80 concurrent calls + */ +#define BD_AIO_MAX_NR_EVENTS 256 + +/* Maximum number of completed IO operations to reap per getevents syscall */ +#define BD_AIO_MAX_NR_GETEVENTS 16 + +int bd_aio_on (xlator_t *this); +int bd_aio_off (xlator_t *this); + +int bd_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t offset, uint32_t flags, dict_t *xdata); + +int bd_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, + struct iovec *vector, int32_t count, off_t offset, + uint32_t flags, struct iobref *iobref, dict_t *xdata); + +#endif /* !_BD_AIO_H */ |