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NFSD: Added TEST_STATEID operation

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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>
This commit is contained in:
Bryan Schumaker
2011-07-13 10:50:48 -04:00
committed by J. Bruce Fields
parent e1ca12dfb1
commit 1745680454
5 changed files with 145 additions and 3 deletions
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87
fs/nfsd/nfs4xdr.c
View File

@@ -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 @@ xdr_error: \
} \
} 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 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
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 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[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 @@ nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
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 @@ static nfsd4_enc nfsd4_enc_ops[] = {
[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,