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pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabled

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Layoutstats is always desirable when using the flexfiles driver, so
we should enable it if that driver is being loaded. It is safe to do
so, because even when the mount specifies NFSv4.1, we will turn it
off if the server tells us it is unsupported.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-05-09 16:02:57 -04:00
parent f4b23de3dd
commit 76b2a30338
1 changed files with 11 additions and 0 deletions
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11
fs/nfs/flexfilelayout/flexfilelayout.c
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@ -2361,10 +2361,21 @@ ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
return 0;
}
static int
ff_layout_set_layoutdriver(struct nfs_server *server,
const struct nfs_fh *dummy)
{
#if IS_ENABLED(CONFIG_NFS_V4_2)
server->caps |= NFS_CAP_LAYOUTSTATS;
#endif
return 0;
}
static struct pnfs_layoutdriver_type flexfilelayout_type = {
.id = LAYOUT_FLEX_FILES,
.name = "LAYOUT_FLEX_FILES",
.owner = THIS_MODULE,
.set_layoutdriver = ff_layout_set_layoutdriver,
.alloc_layout_hdr = ff_layout_alloc_layout_hdr,
.free_layout_hdr = ff_layout_free_layout_hdr,
.alloc_lseg = ff_layout_alloc_lseg,