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| author | Andy Adamson <andros@netapp.com> | 2009-06-16 04:19:38 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-06-16 17:13:16 -0700 |
| commit | 5d77ddfbcb062f2617ea79d7a371b4bc78f28417 (patch) | |
| tree | 335dc6b860d26bf61bfc444bc7f1933ab0762363 | |
| parent | 6c18ba9f5e506b8115b89b1aa7bdc25178f40b0a (diff) | |
| download | linux-5d77ddfbcb062f2617ea79d7a371b4bc78f28417.tar.bz2 | |
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>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 5 |
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; |