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authorAndy Adamson <andros@netapp.com>2009-06-16 04:19:38 +0300
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-06-16 17:13:16 -0700
commit5d77ddfbcb062f2617ea79d7a371b4bc78f28417 (patch)
tree335dc6b860d26bf61bfc444bc7f1933ab0762363 /fs/nfsd/nfs4state.c
parent6c18ba9f5e506b8115b89b1aa7bdc25178f40b0a (diff)
nfsd41: sanity check client drc maxreqs
Ensure the client requested maximum requests are between 1 and NFSD_MAX_SLOTS_PER_SESSION Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd/nfs4state.c')
-rw-r--r--fs/nfsd/nfs4state.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d5caf2a709d2..99570c49add5 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -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;