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NFSD: TEST_STATEID should not return NFS4ERR_STALE_STATEID

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According to RFC 5661, the TEST_STATEID operation is not allowed to
return NFS4ERR_STALE_STATEID.  In addition, RFC 5661 says:

15.1.16.5.  NFS4ERR_STALE_STATEID (Error Code 10023)

   A stateid generated by an earlier server instance was used.  This
   error is moot in NFSv4.1 because all operations that take a stateid
   MUST be preceded by the SEQUENCE operation, and the earlier server
   instance is detected by the session infrastructure that supports
   SEQUENCE.

I triggered NFS4ERR_STALE_STATEID while testing the Linux client's
NOGRACE recovery.  Bruce suggested an additional test that could be
useful to client developers.

Lastly, RFC 5661, section 18.48.3 has this:

 o  Special stateids are always considered invalid (they result in the
    error code NFS4ERR_BAD_STATEID).

An explicit check is made for those state IDs to avoid printk noise.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2012-05-29 13:56:37 -04:00 committed by J. Bruce Fields
parent 2411967305
commit 7df302f75e
2 changed files with 16 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
fs/nfsd/nfs4state.c
View file

@ -38,6 +38,7 @@
#include <linux/namei.h> #include <linux/namei.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/ratelimit.h>
#include <linux/sunrpc/svcauth_gss.h> #include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/clnt.h> #include <linux/sunrpc/clnt.h>
#include "xdr4.h" #include "xdr4.h"
@ -3338,18 +3339,26 @@ static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_s
return nfserr_old_stateid; return nfserr_old_stateid;
} }
__be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
{ {
struct nfs4_stid *s; struct nfs4_stid *s;
struct nfs4_ol_stateid *ols; struct nfs4_ol_stateid *ols;
__be32 status; __be32 status;
if (STALE_STATEID(stateid)) if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return nfserr_stale_stateid; return nfserr_bad_stateid;
/* Client debugging aid. */
if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
char addr_str[INET6_ADDRSTRLEN];
rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
sizeof(addr_str));
pr_warn_ratelimited("NFSD: client %s testing state ID "
"with incorrect client ID\n", addr_str);
return nfserr_bad_stateid;
}
s = find_stateid(cl, stateid); s = find_stateid(cl, stateid);
if (!s) if (!s)
return nfserr_stale_stateid; return nfserr_bad_stateid;
status = check_stateid_generation(stateid, &s->sc_stateid, 1); status = check_stateid_generation(stateid, &s->sc_stateid, 1);
if (status) if (status)
return status; return status;
@ -3468,7 +3477,8 @@ nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state(); nfs4_lock_state();
list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); stateid->ts_id_status =
nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
nfs4_unlock_state(); nfs4_unlock_state();
return nfs_ok; return nfs_ok;

1
fs/nfsd/state.h
View file

@ -475,7 +475,6 @@ extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
extern int nfs4_client_to_reclaim(const char *name); extern int nfs4_client_to_reclaim(const char *name);
extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id); extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
extern void release_session_client(struct nfsd4_session *); extern void release_session_client(struct nfsd4_session *);
extern __be32 nfs4_validate_stateid(struct nfs4_client *, stateid_t *);
extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *); extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
/* nfs4recover operations */ /* nfs4recover operations */