nfsd currently reports the NFSv4 dtpref FSINFO parameter
to be PAGE_SIZE, so NFS clients will typically ask for one
page of directory entries at a time. This is needlessly restrictive
as nfsd can handle larger replies easily.
Also, a READDIR request (but not a READDIRPLUS request) has the count
size clipped to PAGE_SIE, again unnecessary.
This patch lifts these limits so that larger readdir requests can be
used.
Signed-off-by: NeilBrown <neilb@xxxxxxxx>
---
fs/nfsd/nfs3proc.c | 2 +-
fs/nfsd/nfs3xdr.c | 4 +++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index c9cf46e0c040..8f933e84cec1 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -588,7 +588,7 @@ nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
resp->f_wtmax = max_blocksize;
resp->f_wtpref = max_blocksize;
resp->f_wtmult = PAGE_SIZE;
- resp->f_dtpref = PAGE_SIZE;
+ resp->f_dtpref = max_blocksize;
resp->f_maxfilesize = ~(u32) 0;
resp->f_properties = NFS3_FSF_DEFAULT;
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 83919116d5cb..93fea246f676 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -573,6 +573,8 @@ int
nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_readdirargs *args = rqstp->rq_argp;
+ u32 max_blocksize = svc_max_payload(rqstp);
+
p = decode_fh(p, &args->fh);
if (!p)
return 0;
@@ -580,7 +582,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
args->verf = p; p += 2;
args->dircount = ~0;
args->count = ntohl(*p++);
- args->count = min_t(u32, args->count, PAGE_SIZE);
+ args->count = min_t(u32, args->count, max_blocksize);
args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
--
2.14.0.rc0.dirty
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