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| author |   NeilBrown <neilb@suse.com> | 2019-03-07 09:49:46 +1100 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2019-03-08 14:30:31 -0500 |
| commit | f875a792abe933d0b4553ab6e29c624b58932e41 (patch) | |
| tree | b866463dc65f11f6a3ec930aae575425c054f94f /fs/nfsd/nfs3xdr.c | |
| parent | nfsd: fix wrong check in write_v4_end_grace() (diff) | |
| download | linux-dev-f875a792abe933d0b4553ab6e29c624b58932e41.tar.xz linux-dev-f875a792abe933d0b4553ab6e29c624b58932e41.zip | |
nfsd: allow nfsv3 readdir request to be larger.
nfsd currently reports the NFSv3 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@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/nfsd/nfs3xdr.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); |