NFSD: Added TEST_STATEID operation
This operation is used by the client to check the validity of a list of
stateids.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index ef9bd6f..a8d83bd 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -44,13 +44,14 @@
#include <linux/namei.h>
#include <linux/statfs.h>
#include <linux/utsname.h>
+#include <linux/pagemap.h>
#include <linux/sunrpc/svcauth_gss.h>
#include "idmap.h"
#include "acl.h"
#include "xdr4.h"
#include "vfs.h"
-
+#include "state.h"
#define NFSDDBG_FACILITY NFSDDBG_XDR
@@ -131,6 +132,22 @@
} \
} while (0)
+static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
+{
+ savep->p = argp->p;
+ savep->end = argp->end;
+ savep->pagelen = argp->pagelen;
+ savep->pagelist = argp->pagelist;
+}
+
+static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
+{
+ argp->p = savep->p;
+ argp->end = savep->end;
+ argp->pagelen = savep->pagelen;
+ argp->pagelist = savep->pagelist;
+}
+
static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
{
/* We want more bytes than seem to be available.
@@ -1274,6 +1291,40 @@
DECODE_TAIL;
}
+static __be32
+nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
+{
+ unsigned int nbytes;
+ stateid_t si;
+ int i;
+ __be32 *p;
+ __be32 status;
+
+ READ_BUF(4);
+ test_stateid->ts_num_ids = ntohl(*p++);
+
+ nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
+ if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
+ goto xdr_error;
+
+ test_stateid->ts_saved_args = argp;
+ save_buf(argp, &test_stateid->ts_savedp);
+
+ for (i = 0; i < test_stateid->ts_num_ids; i++) {
+ status = nfsd4_decode_stateid(argp, &si);
+ if (status)
+ return status;
+ }
+
+ status = 0;
+out:
+ return status;
+xdr_error:
+ dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
+ status = nfserr_bad_xdr;
+ goto out;
+}
+
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
{
DECODE_HEAD;
@@ -1393,7 +1444,7 @@
[OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
[OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
[OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
@@ -3166,6 +3217,36 @@
return 0;
}
+__be32
+nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
+ struct nfsd4_test_stateid *test_stateid)
+{
+ struct nfsd4_compoundargs *argp;
+ stateid_t si;
+ __be32 *p;
+ int i;
+ int valid;
+
+ restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
+ argp = test_stateid->ts_saved_args;
+
+ RESERVE_SPACE(4);
+ *p++ = htonl(test_stateid->ts_num_ids);
+ resp->p = p;
+
+ nfs4_lock_state();
+ for (i = 0; i < test_stateid->ts_num_ids; i++) {
+ nfsd4_decode_stateid(argp, &si);
+ valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
+ RESERVE_SPACE(4);
+ *p++ = htonl(valid);
+ resp->p = p;
+ }
+ nfs4_unlock_state();
+
+ return nfserr;
+}
+
static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
@@ -3234,7 +3315,7 @@
[OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
[OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
[OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,