From fe0fe83585f88346557868a803a479dfaaa0688a Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Fri, 6 Jan 2012 09:31:20 +0200 Subject: 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 Signed-off-by: Boaz Harrosh Signed-off-by: Trond Myklebust --- fs/nfs/pnfs.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'fs/nfs/pnfs.c') diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 8e672a2b2d6..f881a638794 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1178,6 +1178,15 @@ void pnfs_ld_write_done(struct nfs_write_data *data) put_lseg(data->lseg); data->lseg = NULL; dprintk("pnfs write error = %d\n", data->pnfs_error); + if (NFS_SERVER(data->inode)->pnfs_curr_ld->flags & + PNFS_LAYOUTRET_ON_ERROR) { + /* Don't lo_commit on error, Server will needs to + * preform a file recovery. + */ + clear_bit(NFS_INO_LAYOUTCOMMIT, + &NFS_I(data->inode)->flags); + pnfs_return_layout(data->inode); + } } data->mds_ops->rpc_release(data); } @@ -1267,6 +1276,9 @@ static void pnfs_ld_handle_read_error(struct nfs_read_data *data) put_lseg(data->lseg); data->lseg = NULL; dprintk("pnfs write error = %d\n", data->pnfs_error); + if (NFS_SERVER(data->inode)->pnfs_curr_ld->flags & + PNFS_LAYOUTRET_ON_ERROR) + pnfs_return_layout(data->inode); nfs_pageio_init_read_mds(&pgio, data->inode); -- cgit v1.2.3-70-g09d2