linux/fs/nfs/objlayout
Boaz Harrosh fe0fe83585 pnfs-obj: Must return layout on IO error
As mandated by the standard. In case of an IO error, a pNFS
objects layout driver must return it's layout. This is because
all device errors are reported to the server as part of the
layout return buffer.

This is implemented the same way PNFS_LAYOUTRET_ON_SETATTR
is done, through a bit flag on the pnfs_layoutdriver_type->flags
member. The flag is set by the layout driver that wants a
layout_return preformed at pnfs_ld_{write,read}_done in case
of an error.
(Though I have not defined a wrapper like pnfs_ld_layoutret_on_setattr
 because this code is never called outside of pnfs.c and pnfs IO
 paths)

Without this patch 3.[0-2] Kernels leak memory and have an annoying
WARN_ON after every IO error utilizing the pnfs-obj driver.

[This patch is for 3.2 Kernel. 3.1/0 Kernels need a different patch]
CC: Stable Tree <stable@kernel.org>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-06 08:55:33 -05:00
..
Kbuild pnfs-obj: decode layout, alloc/free lseg 2011-05-29 20:53:06 +03:00
objio_osd.c pnfs-obj: Must return layout on IO error 2012-01-06 08:55:33 -05:00
objlayout.c pnfs-obj: pNFS errors are communicated on iodata->pnfs_error 2012-01-06 08:55:23 -05:00
objlayout.h pnfs-obj: Rename objlayout_io_state => objlayout_io_res 2011-11-02 23:56:06 -04:00
pnfs_osd_xdr_cli.c pnfs-obj: Fix the comp_index != 0 case 2011-08-04 11:54:48 -04:00