NFSv4: Send the delegation stateid for SETATTR calls

In the case where we hold a delegation stateid, use that in for inside
SETATTR calls.

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

3 files changed, 33 insertions, 14 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index c6f07c1c71e6..d3be923d4e43 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -421,3 +421,22 @@ void nfs_delegation_reap_unclaimed(struct nfs4_client *clp)
                 nfs_free_delegation(delegation);
         }
 }
+
+int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)
+{
+        struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+        struct nfs_inode *nfsi = NFS_I(inode);
+        struct nfs_delegation *delegation;
+        int res = 0;
+
+        if (nfsi->delegation_state == 0)
+                return 0;
+        spin_lock(&clp->cl_lock);
+        delegation = nfsi->delegation;
+        if (delegation != NULL) {
+                memcpy(dst->data, delegation->stateid.data, sizeof(dst->data));
+                res = 1;
+        }
+        spin_unlock(&clp->cl_lock);
+        return res;
+}
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 7a0b2bfce771..3858694652fa 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -41,6 +41,7 @@ void nfs_delegation_reap_unclaimed(struct nfs4_client *clp);
 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid);
 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state);
 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
+int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
 
 static inline int nfs_have_delegation(struct inode *inode, int flags)
 {
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index bad1eae5608a..62aed077fc2a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1018,12 +1018,12 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry,
         return res;
 }
 
-static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
-                struct nfs_fh *fhandle, struct iattr *sattr,
-                struct nfs4_state *state)
+static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
+                struct iattr *sattr, struct nfs4_state *state)
 {
+        struct nfs_server *server = NFS_SERVER(inode);
         struct nfs_setattrargs  arg = {
-                .fh             = fhandle,
+                .fh             = NFS_FH(inode),
                 .iap            = sattr,
                 .server         = server,
                 .bitmask = server->attr_bitmask,
@@ -1042,7 +1042,9 @@ static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
 
         nfs_fattr_init(fattr);
 
-        if (state != NULL) {
+        if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
+                /* Use that stateid */
+        } else if (state != NULL) {
                 msg.rpc_cred = state->owner->so_cred;
                 nfs4_copy_stateid(&arg.stateid, state, current->files);
         } else
@@ -1054,16 +1056,15 @@ static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
         return status;
 }
 
-static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
-                struct nfs_fh *fhandle, struct iattr *sattr,
-                struct nfs4_state *state)
+static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
+                struct iattr *sattr, struct nfs4_state *state)
 {
+        struct nfs_server *server = NFS_SERVER(inode);
         struct nfs4_exception exception = { };
         int err;
         do {
                 err = nfs4_handle_exception(server,
-                                _nfs4_do_setattr(server, fattr, fhandle, sattr,
-                                        state),
+                                _nfs4_do_setattr(inode, fattr, sattr, state),
                                 &exception);
         } while (exception.retry);
         return err;
@@ -1504,8 +1505,7 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
         if (ctx != NULL)
                 state = ctx->state;
 
-        status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
-                        NFS_FH(inode), sattr, state);
+        status = nfs4_do_setattr(inode, fattr, sattr, state);
         if (status == 0)
                 nfs_setattr_update_inode(inode, sattr);
         if (ctx != NULL)
@@ -1824,8 +1824,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
         d_instantiate(dentry, igrab(state->inode));
         if (flags & O_EXCL) {
                 struct nfs_fattr fattr;
-                status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
-                                     NFS_FH(state->inode), sattr, state);
+                status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
                 if (status == 0)
                         nfs_setattr_update_inode(state->inode, sattr);
         }