Merge tag 'nfs-for-5.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

Puyll NFS client updates from Anna Schumaker:
 "Stable bugfixes:
   - Fix memory leaks and corruption in readdir # v2.6.37+
   - Directory page cache needs to be locked when read # v2.6.37+

  New features:
   - Convert NFS to use the new mount API
   - Add "softreval" mount option to let clients use cache if server goes down
   - Add a config option to compile without UDP support
   - Limit the number of inactive delegations the client can cache at once
   - Improved readdir concurrency using iterate_shared()

  Other bugfixes and cleanups:
   - More 64-bit time conversions
   - Add additional diagnostic tracepoints
   - Check for holes in swapfiles, and add dependency on CONFIG_SWAP
   - Various xprtrdma cleanups to prepare for 5.7's changes
   - Several fixes for NFS writeback and commit handling
   - Fix acls over krb5i/krb5p mounts
   - Recover from premature loss of openstateids
   - Fix NFS v3 chacl and chmod bug
   - Compare creds using cred_fscmp()
   - Use kmemdup_nul() in more places
   - Optimize readdir cache page invalidation
   - Lease renewal and recovery fixes"

* tag 'nfs-for-5.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (93 commits)
  NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals
  NFSv4: try lease recovery on NFS4ERR_EXPIRED
  NFS: Fix memory leaks
  nfs: optimise readdir cache page invalidation
  NFS: Switch readdir to using iterate_shared()
  NFS: Use kmemdup_nul() in nfs_readdir_make_qstr()
  NFS: Directory page cache pages need to be locked when read
  NFS: Fix memory leaks and corruption in readdir
  SUNRPC: Use kmemdup_nul() in rpc_parse_scope_id()
  NFS: Replace various occurrences of kstrndup() with kmemdup_nul()
  NFSv4: Limit the total number of cached delegations
  NFSv4: Add accounting for the number of active delegations held
  NFSv4: Try to return the delegation immediately when marked for return on close
  NFS: Clear NFS_DELEGATION_RETURN_IF_CLOSED when the delegation is returned
  NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNING
  NFS: nfs_find_open_context() should use cred_fscmp()
  NFS: nfs_access_get_cached_rcu() should use cred_fscmp()
  NFSv4: pnfs_roc() must use cred_fscmp() to compare creds
  NFS: remove unused macros
  nfs: Return EINVAL rather than ERANGE for mount parse errors
  ...

7 files changed, 18 insertions, 15 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index c06b1fd130f3..a5f8f03ecd59 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -168,6 +168,9 @@ struct nfs_inode {
 	struct rw_semaphore	rmdir_sem;
 	struct mutex		commit_mutex;
 
+	/* track last access to cached pages */
+	unsigned long		page_index;
+
 #if IS_ENABLED(CONFIG_NFS_V4)
 	struct nfs4_cached_acl	*nfs4_acl;
         /* NFSv4 state */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index c176f705bf98..465fa98258a3 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -152,6 +152,7 @@ struct nfs_server {
 #define NFS_MOUNT_LOCAL_FLOCK		0x100000
 #define NFS_MOUNT_LOCAL_FCNTL		0x200000
 #define NFS_MOUNT_SOFTERR		0x400000
+#define NFS_MOUNT_SOFTREVAL		0x800000
 
 	unsigned int		caps;		/* server capabilities */
 	unsigned int		rsize;		/* read size */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 72d5695c1b47..94c77ed55ce1 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1639,6 +1639,7 @@ struct nfs_subversion;
 struct nfs_mount_info;
 struct nfs_client_initdata;
 struct nfs_pageio_descriptor;
+struct fs_context;
 
 /*
  * RPC procedure vector for NFSv2/NFSv3 demuxing
@@ -1653,16 +1654,14 @@ struct nfs_rpc_ops {
 
 	int	(*getroot) (struct nfs_server *, struct nfs_fh *,
 			    struct nfs_fsinfo *);
-	struct vfsmount *(*submount) (struct nfs_server *, struct dentry *,
-				      struct nfs_fh *, struct nfs_fattr *);
-	struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *,
-				     struct nfs_subversion *);
+	int	(*submount) (struct fs_context *, struct nfs_server *);
+	int	(*try_get_tree) (struct fs_context *);
 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
 			    struct nfs_fattr *, struct nfs4_label *,
 			    struct inode *);
 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
 			    struct iattr *);
-	int	(*lookup)  (struct inode *, const struct qstr *,
+	int	(*lookup)  (struct inode *, struct dentry *,
 			    struct nfs_fh *, struct nfs_fattr *,
 			    struct nfs4_label *);
 	int	(*lookupp) (struct inode *, struct nfs_fh *,
@@ -1723,7 +1722,7 @@ struct nfs_rpc_ops {
 	struct nfs_client *(*init_client) (struct nfs_client *,
 				const struct nfs_client_initdata *);
 	void	(*free_client) (struct nfs_client *);
-	struct nfs_server *(*create_server)(struct nfs_mount_info *, struct nfs_subversion *);
+	struct nfs_server *(*create_server)(struct fs_context *);
 	struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *,
 					   struct nfs_fattr *, rpc_authflavor_t);
 };
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index e9ec742796e7..4f6b28487f28 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -113,7 +113,6 @@ struct rpc_authops {
 	int			(*hash_cred)(struct auth_cred *, unsigned int);
 	struct rpc_cred *	(*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
 	struct rpc_cred *	(*crcreate)(struct rpc_auth*, struct auth_cred *, int, gfp_t);
-	int			(*list_pseudoflavors)(rpc_authflavor_t *, int);
 	rpc_authflavor_t	(*info2flavor)(struct rpcsec_gss_info *);
 	int			(*flavor2info)(rpc_authflavor_t,
 						struct rpcsec_gss_info *);
@@ -158,7 +157,6 @@ rpc_authflavor_t	rpcauth_get_pseudoflavor(rpc_authflavor_t,
 				struct rpcsec_gss_info *);
 int			rpcauth_get_gssinfo(rpc_authflavor_t,
 				struct rpcsec_gss_info *);
-int			rpcauth_list_flavors(rpc_authflavor_t *, int);
 struct rpc_cred *	rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int, gfp_t);
 void			rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
 struct rpc_cred *	rpcauth_lookupcred(struct rpc_auth *, int);
diff --git a/include/linux/sunrpc/gss_api.h b/include/linux/sunrpc/gss_api.h
index 1cc6cefb1220..48c1b1674cbf 100644
--- a/include/linux/sunrpc/gss_api.h
+++ b/include/linux/sunrpc/gss_api.h
@@ -150,9 +150,6 @@ struct gss_api_mech *gss_mech_get_by_name(const char *);
 /* Similar, but get by pseudoflavor. */
 struct gss_api_mech *gss_mech_get_by_pseudoflavor(u32);
 
-/* Fill in an array with a list of supported pseudoflavors */
-int gss_mech_list_pseudoflavors(rpc_authflavor_t *, int);
-
 struct gss_api_mech * gss_mech_get(struct gss_api_mech *);
 
 /* For every successful gss_mech_get or gss_mech_get_by_* call there must be a
diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h
index 18790582d2a5..c0e4c93324f5 100644
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -729,6 +729,7 @@ TRACE_EVENT(xprtrdma_post_send,
 
 	TP_STRUCT__entry(
 		__field(const void *, req)
+		__field(const void *, sc)
 		__field(unsigned int, task_id)
 		__field(unsigned int, client_id)
 		__field(int, num_sge)
@@ -743,14 +744,15 @@ TRACE_EVENT(xprtrdma_post_send,
 		__entry->client_id = rqst->rq_task->tk_client ?
 				     rqst->rq_task->tk_client->cl_clid : -1;
 		__entry->req = req;
+		__entry->sc = req->rl_sendctx;
 		__entry->num_sge = req->rl_wr.num_sge;
 		__entry->signaled = req->rl_wr.send_flags & IB_SEND_SIGNALED;
 		__entry->status = status;
 	),
 
-	TP_printk("task:%u@%u req=%p (%d SGE%s) %sstatus=%d",
+	TP_printk("task:%u@%u req=%p sc=%p (%d SGE%s) %sstatus=%d",
 		__entry->task_id, __entry->client_id,
-		__entry->req, __entry->num_sge,
+		__entry->req, __entry->sc, __entry->num_sge,
 		(__entry->num_sge == 1 ? "" : "s"),
 		(__entry->signaled ? "signaled " : ""),
 		__entry->status
@@ -849,6 +851,7 @@ TRACE_EVENT(xprtrdma_wc_send,
 
 	TP_STRUCT__entry(
 		__field(const void *, req)
+		__field(const void *, sc)
 		__field(unsigned int, unmap_count)
 		__field(unsigned int, status)
 		__field(unsigned int, vendor_err)
@@ -856,13 +859,14 @@ TRACE_EVENT(xprtrdma_wc_send,
 
 	TP_fast_assign(
 		__entry->req = sc->sc_req;
+		__entry->sc = sc;
 		__entry->unmap_count = sc->sc_unmap_count;
 		__entry->status = wc->status;
 		__entry->vendor_err = __entry->status ? wc->vendor_err : 0;
 	),
 
-	TP_printk("req=%p, unmapped %u pages: %s (%u/0x%x)",
-		__entry->req, __entry->unmap_count,
+	TP_printk("req=%p sc=%p unmapped=%u: %s (%u/0x%x)",
+		__entry->req, __entry->sc, __entry->unmap_count,
 		rdma_show_wc_status(__entry->status),
 		__entry->status, __entry->vendor_err
 	)
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 8c73ffb5f7fd..ee993575d2fa 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -185,6 +185,7 @@ DECLARE_EVENT_CLASS(rpc_task_running,
 DEFINE_RPC_RUNNING_EVENT(begin);
 DEFINE_RPC_RUNNING_EVENT(run_action);
 DEFINE_RPC_RUNNING_EVENT(complete);
+DEFINE_RPC_RUNNING_EVENT(signalled);
 DEFINE_RPC_RUNNING_EVENT(end);
 
 DECLARE_EVENT_CLASS(rpc_task_queued,