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Commit 5d77ddfb authored by Andy Adamson's avatar Andy Adamson Committed by J. Bruce Fields
Browse files

nfsd41: sanity check client drc maxreqs 



Ensure the client requested maximum requests are between 1 and
NFSD_MAX_SLOTS_PER_SESSION

Signed-off-by: default avatarAndy Adamson <andros@netapp.com>
Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent 6c18ba9f

fs/nfsd/nfs4state.c

+5 −0
Original line number Diff line number Diff line
@@ -425,6 +425,11 @@ static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) 
{

	int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT;



	if (fchan->maxreqs < 1)

		return nfserr_inval;

	else if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION)

		fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION;



	spin_lock(&nfsd_serv->sv_lock);

	if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages)

		np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used;