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NFSv4: Replace closed stateids with the "invalid special stateid" 

When decoding a CLOSE, replace the stateid returned by the server
with the "invalid special stateid" described in RFC5661, Section 8.2.3.

In nfs_set_open_stateid_locked, ignore stateids from closed state.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2017-11-07 12:39:44 -05:00 committed by Anna Schumaker
parent e1fff5df6e
commit fcd8843c40
3 changed files with 20 additions and 1 deletions
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1
fs/nfs/nfs4_fs.h
View File

@ -481,6 +481,7 @@ extern int nfs4_sequence_done(struct rpc_task *task,
extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
extern const nfs4_stateid zero_stateid;
extern const nfs4_stateid invalid_stateid;
/* nfs4super.c */
struct nfs_mount_info;

8
fs/nfs/nfs4state.c
View File

@ -69,6 +69,14 @@ const nfs4_stateid zero_stateid = {
{ .data = { 0 } },
.type = NFS4_SPECIAL_STATEID_TYPE,
};
const nfs4_stateid invalid_stateid = {
{
.seqid = cpu_to_be32(0xffffffffU),
.other = { 0 },
},
.type = NFS4_INVALID_STATEID_TYPE,
};
static DEFINE_MUTEX(nfs_clid_init_mutex);
int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)

12
fs/nfs/nfs4xdr.c
View File

@ -4385,6 +4385,14 @@ static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *state
return decode_stateid(xdr, stateid);
}
static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
{
nfs4_stateid dummy;
nfs4_stateid_copy(stateid, &invalid_stateid);
return decode_stateid(xdr, &dummy);
}
static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
int status;
@ -4393,7 +4401,7 @@ static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (!status)
status = decode_open_stateid(xdr, &res->stateid);
status = decode_invalid_stateid(xdr, &res->stateid);
return status;
}
@ -6108,6 +6116,8 @@ static int decode_layoutreturn(struct xdr_stream *xdr,
res->lrs_present = be32_to_cpup(p);
if (res->lrs_present)
status = decode_layout_stateid(xdr, &res->stateid);
else
nfs4_stateid_copy(&res->stateid, &invalid_stateid);
return status;
out_overflow:
print_overflow_msg(__func__, xdr);