* [PATCH v2] nfsd: check for use of the closed special stateid
@ 2017-11-09 18:41 Andrew Elble
2017-11-09 18:52 ` J. Bruce Fields
0 siblings, 1 reply; 2+ messages in thread
From: Andrew Elble @ 2017-11-09 18:41 UTC (permalink / raw)
To: linux-nfs, trond.myklebust, bfields; +Cc: Andrew Elble
Prevent the use of the closed (invalid) special stateid by clients.
Signed-off-by: Andrew Elble <aweits@rit.edu>
---
v2: don't print warning on use of closed special stateid
fs/nfsd/nfs4state.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 5740ad8075c3..9ae75c949290 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -73,6 +73,7 @@
#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
+#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
/* forward declarations */
static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
@@ -4885,7 +4886,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
struct nfs4_stid *s;
__be32 status = nfserr_bad_stateid;
- if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
+ if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
+ CLOSE_STATEID(stateid))
return status;
/* Client debugging aid. */
if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
@@ -4943,7 +4945,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
else if (typemask & NFS4_DELEG_STID)
typemask |= NFS4_REVOKED_DELEG_STID;
- if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
+ if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
+ CLOSE_STATEID(stateid))
return nfserr_bad_stateid;
status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
if (status == nfserr_stale_clientid) {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] nfsd: check for use of the closed special stateid
2017-11-09 18:41 [PATCH v2] nfsd: check for use of the closed special stateid Andrew Elble
@ 2017-11-09 18:52 ` J. Bruce Fields
0 siblings, 0 replies; 2+ messages in thread
From: J. Bruce Fields @ 2017-11-09 18:52 UTC (permalink / raw)
To: Andrew Elble; +Cc: linux-nfs, trond.myklebust
Thanks! Applied.--b.
On Thu, Nov 09, 2017 at 01:41:10PM -0500, Andrew Elble wrote:
> Prevent the use of the closed (invalid) special stateid by clients.
>
> Signed-off-by: Andrew Elble <aweits@rit.edu>
> ---
> v2: don't print warning on use of closed special stateid
>
> fs/nfsd/nfs4state.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 5740ad8075c3..9ae75c949290 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -73,6 +73,7 @@
> #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
> #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
> #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
> +#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
>
> /* forward declarations */
> static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
> @@ -4885,7 +4886,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
> struct nfs4_stid *s;
> __be32 status = nfserr_bad_stateid;
>
> - if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
> + if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
> + CLOSE_STATEID(stateid))
> return status;
> /* Client debugging aid. */
> if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
> @@ -4943,7 +4945,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
> else if (typemask & NFS4_DELEG_STID)
> typemask |= NFS4_REVOKED_DELEG_STID;
>
> - if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
> + if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
> + CLOSE_STATEID(stateid))
> return nfserr_bad_stateid;
> status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
> if (status == nfserr_stale_clientid) {
> --
> 1.8.3.1
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