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nfsd: fix encode_entryplus_baggage stack usage

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We stick an extra svc_fh in nfsd3_readdirres to save the need to
kmalloc, though maybe it would be fine to kmalloc instead.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2014-01-09 16:24:35 -05:00
parent 3554116d3a
commit 068c34c0ce
2 changed files with 9 additions and 6 deletions
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12
fs/nfsd/nfs3xdr.c
View file

@ -842,21 +842,21 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen)
{
struct svc_fh fh;
struct svc_fh *fh = &cd->scratch;
__be32 err;
fh_init(&fh, NFS3_FHSIZE);
err = compose_entry_fh(cd, &fh, name, namlen);
fh_init(fh, NFS3_FHSIZE);
err = compose_entry_fh(cd, fh, name, namlen);
if (err) {
*p++ = 0;
*p++ = 0;
goto out;
}
p = encode_post_op_attr(cd->rqstp, p, &fh);
p = encode_post_op_attr(cd->rqstp, p, fh);
*p++ = xdr_one; /* yes, a file handle follows */
p = encode_fh(p, &fh);
p = encode_fh(p, fh);
out:
fh_put(&fh);
fh_put(fh);
return p;
}

3
fs/nfsd/xdr3.h
View file

@ -174,6 +174,9 @@ struct nfsd3_linkres {
struct nfsd3_readdirres {
__be32 status;
struct svc_fh fh;
/* Just to save kmalloc on every readdirplus entry (svc_fh is a
* little large for the stack): */
struct svc_fh scratch;
int count;
__be32 verf[2];