NFSv4: Further clean-ups of delegation stateid validation

Change the name to reflect what we're really doing: testing two
stateids for whether or not they match according the the rules in
RFC3530 and RFC5661.
Move the code from callback_proc.c to nfs4proc.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index ea83219..1b5d809 100644 (file)
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -98,14 +98,6 @@ out:
        return res;
 }
 
-int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
-{
-       if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
-                                        sizeof(delegation->stateid.data)) != 0)
-               return 0;
-       return 1;
-}
-
 #if defined(CONFIG_NFS_V4_1)
 
 /*
@@ -319,22 +311,6 @@ out:
        return res;
 }
 
-int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
-{
-       if (delegation == NULL)
-               return 0;
-
-       if (stateid->stateid.seqid != 0 &&
-           stateid->stateid.seqid != delegation->stateid.stateid.seqid)
-               return 0;
-       if (memcmp(delegation->stateid.stateid.other,
-                  stateid->stateid.other,
-                  NFS4_STATEID_OTHER_SIZE))
-               return 0;
-
-       return 1;
-}
-
 /*
  * Validate the sequenceID sent by the server.
  * Return success if the sequenceID is one more than what we last saw on

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index c14512c..c7249e2 100644 (file)
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -556,7 +556,7 @@ int nfs_async_inode_return_delegation(struct inode *inode,
        rcu_read_lock();
        delegation = rcu_dereference(NFS_I(inode)->delegation);
 
-       if (!clp->cl_mvops->validate_stateid(delegation, stateid)) {
+       if (!clp->cl_mvops->match_stateid(&delegation->stateid, stateid)) {
                rcu_read_unlock();
                return -ENOENT;
        }

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 7ddad3f..624d4be 100644 (file)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -43,7 +43,7 @@ struct nfs4_minor_version_ops {
                        struct nfs4_sequence_args *args,
                        struct nfs4_sequence_res *res,
                        int cache_reply);
-       int     (*validate_stateid)(struct nfs_delegation *,
+       bool    (*match_stateid)(const nfs4_stateid *,
                        const nfs4_stateid *);
        int     (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
                        struct nfs_fsinfo *);

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f31fcea..b0647b3 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6271,8 +6271,31 @@ static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
        } while (exception.retry);
        return err;
 }
+
+static bool nfs41_match_stateid(const nfs4_stateid *s1,
+               const nfs4_stateid *s2)
+{
+       if (memcmp(s1->stateid.other, s2->stateid.other,
+                  sizeof(s1->stateid.other)) != 0)
+               return false;
+
+       if (s1->stateid.seqid == s2->stateid.seqid)
+               return true;
+       if (s1->stateid.seqid == 0 || s2->stateid.seqid == 0)
+               return true;
+
+       return false;
+}
+
 #endif /* CONFIG_NFS_V4_1 */
 
+static bool nfs4_match_stateid(const nfs4_stateid *s1,
+               const nfs4_stateid *s2)
+{
+       return memcmp(s1->data, s2->data, sizeof(s1->data)) == 0;
+}
+
+
 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
        .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
        .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
@@ -6331,7 +6354,7 @@ struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
        .minor_version = 0,
        .call_sync = _nfs4_call_sync,
-       .validate_stateid = nfs4_validate_delegation_stateid,
+       .match_stateid = nfs4_match_stateid,
        .find_root_sec = nfs4_find_root_sec,
        .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
        .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
@@ -6342,7 +6365,7 @@ static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
        .minor_version = 1,
        .call_sync = _nfs4_call_sync_session,
-       .validate_stateid = nfs41_validate_delegation_stateid,
+       .match_stateid = nfs41_match_stateid,
        .find_root_sec = nfs41_find_root_sec,
        .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
        .nograce_recovery_ops = &nfs41_nograce_recovery_ops,