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block/nfs: add knob to set readahead 

upcoming libnfs will feature internal readahead support.
Add a knob to pass the optional readahead value as a URL
parameter.

Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Peter Lieven 2014-06-25 00:06:01 +02:00 committed by Kevin Wolf
parent 7c24384b3b
commit f42ca3cad1
1 changed files with 4 additions and 0 deletions
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block/nfs.c
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@ -321,6 +321,10 @@ static int64_t nfs_client_open(NFSClient *client, const char *filename,
nfs_set_gid(client->context, val);
} else if (!strcmp(qp->p[i].name, "tcp-syncnt")) {
nfs_set_tcp_syncnt(client->context, val);
#ifdef LIBNFS_FEATURE_READAHEAD
} else if (!strcmp(qp->p[i].name, "readahead")) {
nfs_set_readahead(client->context, val);
#endif
} else {
error_setg(errp, "Unknown NFS parameter name: %s",
qp->p[i].name);