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NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS

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The LAYOUTCOMMIT operation means different things to different layout types.
For blocks and objects, it is both a data and metadata consistency operation.
For files and flexfiles, it is only a metadata consistency operation.

This patch separates out the 2 cases, allowing the files/flexfiles layout
drivers to optimise away the data consistency calls to layoutcommit.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust
2015-03-25 14:14:42 -04:00
parent 7140171ea9
commit 5bb89b4702
9 changed files with 47 additions and 8 deletions
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fs/nfs/flexfilelayout/flexfilelayout.c
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@@ -1509,6 +1509,7 @@ static struct pnfs_layoutdriver_type flexfilelayout_type = {
.write_pagelist = ff_layout_write_pagelist,
.alloc_deviceid_node = ff_layout_alloc_deviceid_node,
.encode_layoutreturn = ff_layout_encode_layoutreturn,
.sync = pnfs_nfs_generic_sync,
};
static int __init nfs4flexfilelayout_init(void)