Boaz Harrosh b6c05f1693 pnfs-obj: objio_osd device information retrieval and caching ... When a new layout is received in objio_alloc_lseg all device_ids referenced are retrieved. The device information is queried for from MDS and then the osd_device is looked-up from the osd-initiator library. The devices are cached in a per-mount-point list, for later use. At unmount all devices are "put" back to the library. objlayout_get_deviceinfo(), objlayout_put_deviceinfo() middleware API for retrieving device information given a device_id. TODO: The device cache can get big. Cap its size. Keep an LRU and start to return devices which were not used, when list gets to big, or when new entries allocation fail. [pnfs-obj: Bugs in new global-device-cache code] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [gfp_flags] [use global device cache] [use layout driver in global device cache] Signed-off-by: Benny Halevy <bhalevy@panasas.com>		2011-05-29 20:53:33 +03:00
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Kbuild	pnfs-obj: decode layout, alloc/free lseg	2011-05-29 20:53:06 +03:00
objio_osd.c	pnfs-obj: objio_osd device information retrieval and caching	2011-05-29 20:53:33 +03:00
objlayout.c	pnfs-obj: objio_osd device information retrieval and caching	2011-05-29 20:53:33 +03:00
objlayout.h	pnfs-obj: objio_osd device information retrieval and caching	2011-05-29 20:53:33 +03:00
pnfs_osd_xdr_cli.c	pnfs-obj: pnfs_osd XDR client implementation	2011-05-29 20:52:36 +03:00