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am-utils/am-utils-6.2-add-NFSv3-nfs_quick_reply-functionality.patch

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am-utils-6.2 - add NFSv3 nfs_quick_reply() functionality
From: Ian Kent <raven@themaw.net>
The implementation of the NFS v3 server does not use the hack needed
by the nfs_quick_reply() function.
Now that saving the current transort for later use by nfs_quick_reply()
avoids concurrency races it should be ok to use it.
Signed-off-by: Ian Kent <raven@themaw.net>
---
amd/nfs_prot_svc.c | 13 +++++
amd/nfs_subr.c | 137 +++++++++++++++++++++++++++++++++++++++++-----------
2 files changed, 120 insertions(+), 30 deletions(-)
diff --git a/amd/nfs_prot_svc.c b/amd/nfs_prot_svc.c
index cbde172..29b7551 100644
--- a/amd/nfs_prot_svc.c
+++ b/amd/nfs_prot_svc.c
@@ -180,7 +180,7 @@ nfs_program_2(struct svc_req *rqstp, SVCXPRT *transp)
xdr_result = (xdrproc_t) xdr_diropres;
local = (nfssvcproc_t) nfsproc_lookup_2_svc;
/*
- * Cheap way to pass transp down to amfs_auto_lookuppn so it can
+ * Cheap way to pass transp down to amfs_auto_lookup so it can
* be stored in the am_node structure and later used for
* quick_reply().
*/
@@ -327,6 +327,8 @@ nfs_program_3(struct svc_req *rqstp, register SVCXPRT *transp)
xdrproc_t _xdr_argument, _xdr_result;
nfssvcproc_t local;
+ current_transp = NULL;
+
switch (rqstp->rq_proc) {
case AM_NFS3_NULL:
_xdr_argument = (xdrproc_t) xdr_void;
@@ -350,6 +352,12 @@ nfs_program_3(struct svc_req *rqstp, register SVCXPRT *transp)
_xdr_argument = (xdrproc_t) xdr_am_LOOKUP3args;
_xdr_result = (xdrproc_t) xdr_am_LOOKUP3res;
local = (nfssvcproc_t) (char *(*)(char *, struct svc_req *)) am_nfs3_lookup_3_svc;
+ /*
+ * Cheap way to pass transp down to amfs_auto_lookup so it can
+ * be stored in the am_node structure and later used for
+ * quick_reply().
+ */
+ current_transp = transp;
break;
case AM_NFS3_ACCESS:
@@ -476,6 +484,9 @@ nfs_program_3(struct svc_req *rqstp, register SVCXPRT *transp)
}
result = (*local) (&argument, rqstp);
+
+ current_transp = NULL;
+
if (result != NULL && !svc_sendreply(transp, (xdrproc_t) _xdr_result, result)) {
svcerr_systemerr (transp);
}
diff --git a/amd/nfs_subr.c b/amd/nfs_subr.c
index 07d960d..a383618 100644
--- a/amd/nfs_subr.c
+++ b/amd/nfs_subr.c
@@ -87,6 +87,9 @@ struct am_fh3 {
};
/* forward declarations */
+static int nfs_quick_reply2(am_node *mp, int error);
+static int nfs_quick_reply3(am_node *mp, int error);
+
/* converting am-filehandles to mount-points */
static am_node *fh_to_mp3(am_nfs_fh *fhp, int *rp, int vop);
static am_node *fh_to_mp(am_nfs_fh *fhp);
@@ -255,46 +258,65 @@ nfsproc_lookup_2_svc(nfsdiropargs *argp, struct svc_req *rqstp)
return &res;
}
-
void
nfs_quick_reply(am_node *mp, int error)
{
- SVCXPRT *transp = mp->am_transp;
- nfsdiropres res;
- xdrproc_t xdr_result = (xdrproc_t) xdr_diropres;
+ int ret;
/*
- * If there's a transp structure then we can reply to the client's
- * nfs lookup request.
+ * If there's no transp structure then we can't reply to the
+ * client's nfs lookup request.
*/
- if (transp) {
- if (error == 0) {
- /*
- * Construct a valid reply to a lookup request. Same
- * code as in nfsproc_lookup_2_svc() above.
- */
- mp_to_fh(mp, &res.dr_u.dr_drok_u.drok_fhandle);
- res.dr_u.dr_drok_u.drok_attributes = mp->am_fattr;
- res.dr_status = NFS_OK;
- } else
- /*
- * Return the error that was passed to us.
- */
- res.dr_status = nfs_error(error);
+ if (!mp->am_transp)
+ return;
+
+ if (nfs_dispatcher == nfs_program_2)
+ ret = nfs_quick_reply2(mp, error);
+ else
+ ret = nfs_quick_reply3(mp, error);
+
+ if (!ret)
+ svcerr_systemerr(mp->am_transp);
+
+ /*
+ * Free up transp. It's only used for one reply.
+ */
+ put_nfs_xprt(mp->am_transp);
+ mp->am_transp = NULL;
+ dlog("Quick reply sent for %s", mp->am_al->al_mnt->mf_mount);
+}
+
+static int
+nfs_quick_reply2(am_node *mp, int error)
+{
+ SVCXPRT *transp = mp->am_transp;
+ nfsdiropres res;
+ xdrproc_t xdr_result = (xdrproc_t) xdr_diropres;
+ int ret;
+
+ if (error == 0) {
/*
- * Send off our reply
+ * Construct a valid reply to a lookup request. Same
+ * code as in nfsproc_lookup_2_svc() above.
*/
- if (!svc_sendreply(transp, (XDRPROC_T_TYPE) xdr_result, (SVC_IN_ARG_TYPE) & res))
- svcerr_systemerr(transp);
-
+ mp_to_fh(mp, &res.dr_u.dr_drok_u.drok_fhandle);
+ res.dr_u.dr_drok_u.drok_attributes = mp->am_fattr;
+ res.dr_status = NFS_OK;
+ } else
/*
- * Free up transp. It's only used for one reply.
+ * Return the error that was passed to us.
*/
- put_nfs_xprt(mp->am_transp);
- mp->am_transp = NULL;
- dlog("Quick reply sent for %s", mp->am_al->al_mnt->mf_mount);
- }
+ res.dr_status = nfs_error(error);
+
+ /*
+ * Send off our reply
+ */
+ ret = svc_sendreply(transp,
+ (XDRPROC_T_TYPE) xdr_result,
+ (SVC_IN_ARG_TYPE) & res);
+
+ return ret;
}
@@ -890,6 +912,8 @@ mp_to_fh(am_node *mp, am_nfs_fh *fhp)
/* dlog("mp_to_fh: old filehandle: %d", fp->u.s.fhh_id); */
}
}
+
+
void
mp_to_fh3(am_node *mp, am_nfs_fh3 *fhp)
{
@@ -1257,6 +1281,61 @@ am_nfs3_lookup_3_svc(am_LOOKUP3args *argp, struct svc_req *rqstp)
return &result;
}
+
+static int
+nfs_quick_reply3(am_node *mp, int error)
+{
+ SVCXPRT *transp = mp->am_transp;
+ xdrproc_t xdr_result = (xdrproc_t) xdr_am_LOOKUP3res;
+ am_LOOKUP3res result;
+ am_post_op_attr *post_op_dir;
+ am_post_op_attr *post_op_obj;
+ int ret;
+
+ if (error) {
+ /*
+ * Return the error that was passed to us.
+ */
+ post_op_dir->attributes_follow = 0;
+ result.status = nfs_error(error);
+ } else {
+ post_op_dir = &result.res_u.ok.dir_attributes;
+ post_op_obj = &result.res_u.ok.obj_attributes;
+ am_fattr3 *fattr3;
+ nfsfattr *fattr;
+
+ /*
+ * Construct a valid reply to a lookup request. Same
+ * code as in am_nfs3_lookup_3_svc() above.
+ */
+
+ /* dir attributes */
+ post_op_dir->attributes_follow = 1;
+ fattr3 = &post_op_dir->am_post_op_attr_u.attributes;
+ parent_fattr_to_fattr3(mp, fattr3);
+
+ mp_to_fh3(mp, &result.res_u.ok.object);
+
+ /* mount attributes */
+ post_op_obj->attributes_follow = 1;
+ fattr = &mp->am_fattr;
+ fattr3 = &post_op_obj->am_post_op_attr_u.attributes;
+ fattr_to_fattr3(fattr, fattr3);
+
+ result.status = AM_NFS3_OK;
+ }
+
+ /*
+ * Send off our reply
+ */
+ ret = svc_sendreply(transp,
+ (XDRPROC_T_TYPE) xdr_result,
+ (SVC_IN_ARG_TYPE) &result);
+
+ return ret;
+}
+
+
am_ACCESS3res *
am_nfs3_access_3_svc(am_ACCESS3args *argp, struct svc_req *rqstp)
{
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