Merge tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "Highlights:

   - Add a new knfsd file cache, so that we don't have to open and close
     on each (NFSv2/v3) READ or WRITE. This can speed up read and write
     in some cases. It also replaces our readahead cache.

   - Prevent silent data loss on write errors, by treating write errors
     like server reboots for the purposes of write caching, thus forcing
     clients to resend their writes.

   - Tweak the code that allocates sessions to be more forgiving, so
     that NFSv4.1 mounts are less likely to hang when a server already
     has a lot of clients.

   - Eliminate an arbitrary limit on NFSv4 ACL sizes; they should now be
     limited only by the backend filesystem and the maximum RPC size.

   - Allow the server to enforce use of the correct kerberos credentials
     when a client reclaims state after a reboot.

  And some miscellaneous smaller bugfixes and cleanup"

* tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux: (34 commits)
  sunrpc: clean up indentation issue
  nfsd: fix nfs read eof detection
  nfsd: Make nfsd_reset_boot_verifier_locked static
  nfsd: degraded slot-count more gracefully as allocation nears exhaustion.
  nfsd: handle drc over-allocation gracefully.
  nfsd: add support for upcall version 2
  nfsd: add a "GetVersion" upcall for nfsdcld
  nfsd: Reset the boot verifier on all write I/O errors
  nfsd: Don't garbage collect files that might contain write errors
  nfsd: Support the server resetting the boot verifier
  nfsd: nfsd_file cache entries should be per net namespace
  nfsd: eliminate an unnecessary acl size limit
  Deprecate nfsd fault injection
  nfsd: remove duplicated include from filecache.c
  nfsd: Fix the documentation for svcxdr_tmpalloc()
  nfsd: Fix up some unused variable warnings
  nfsd: close cached files prior to a REMOVE or RENAME that would replace target
  nfsd: rip out the raparms cache
  nfsd: have nfsd_test_lock use the nfsd_file cache
  nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache
  ...

4 files changed, 14 insertions, 6 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b0c6b0d34d02..e0d909d35763 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1168,6 +1168,11 @@ extern void lease_get_mtime(struct inode *, struct timespec64 *time);
 extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);
 extern int vfs_setlease(struct file *, long, struct file_lock **, void **);
 extern int lease_modify(struct file_lock *, int, struct list_head *);
+
+struct notifier_block;
+extern int lease_register_notifier(struct notifier_block *);
+extern void lease_unregister_notifier(struct notifier_block *);
+
 struct files_struct;
 extern void show_fd_locks(struct seq_file *f,
                          struct file *filp, struct files_struct *files);
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 2de3b2ddd19a..1915bdba2fad 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -475,6 +475,8 @@ extern void fsnotify_destroy_mark(struct fsnotify_mark *mark,
 extern void fsnotify_detach_mark(struct fsnotify_mark *mark);
 /* free mark */
 extern void fsnotify_free_mark(struct fsnotify_mark *mark);
+/* Wait until all marks queued for destruction are destroyed */
+extern void fsnotify_wait_marks_destroyed(void);
 /* run all the marks in a group, and clear all of the marks attached to given object type */
 extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group, unsigned int type);
 /* run all the marks in a group, and clear all of the vfsmount marks */
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index c7f38e897174..f8603724fbee 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -87,6 +87,7 @@ struct cache_detail {
                                               int has_died);
 
         struct cache_head *     (*alloc)(void);
+        void                    (*flush)(void);
         int                     (*match)(struct cache_head *orig, struct cache_head *new);
         void                    (*init)(struct cache_head *orig, struct cache_head *new);
         void                    (*update)(struct cache_head *orig, struct cache_head *new);
@@ -107,9 +108,9 @@ struct cache_detail {
         /* fields for communication over channel */
         struct list_head        queue;
 
-        atomic_t                readers;                /* how many time is /chennel open */
-        time_t                  last_close;             /* if no readers, when did last close */
-        time_t                  last_warn;              /* when we last warned about no readers */
+        atomic_t                writers;                /* how many time is /channel open */
+        time_t                  last_close;             /* if no writers, when did last close */
+        time_t                  last_warn;              /* when we last warned about no writers */
 
         union {
                 struct proc_dir_entry   *procfs;
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 981f0d726ad4..40f65888dd38 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -42,6 +42,7 @@
 
 #ifndef SVC_RDMA_H
 #define SVC_RDMA_H
+#include <linux/llist.h>
 #include <linux/sunrpc/xdr.h>
 #include <linux/sunrpc/svcsock.h>
 #include <linux/sunrpc/rpc_rdma.h>
@@ -107,8 +108,7 @@ struct svcxprt_rdma {
         struct list_head     sc_read_complete_q;
         struct work_struct   sc_work;
 
-        spinlock_t           sc_recv_lock;
-        struct list_head     sc_recv_ctxts;
+        struct llist_head    sc_recv_ctxts;
 };
 /* sc_flags */
 #define RDMAXPRT_CONN_PENDING   3
@@ -125,6 +125,7 @@ enum {
 #define RPCSVC_MAXPAYLOAD_RDMA  RPCSVC_MAXPAYLOAD
 
 struct svc_rdma_recv_ctxt {
+        struct llist_node       rc_node;
         struct list_head        rc_list;
         struct ib_recv_wr       rc_recv_wr;
         struct ib_cqe           rc_cqe;
@@ -200,7 +201,6 @@ extern struct svc_xprt_class svc_rdma_bc_class;
 #endif
 
 /* svc_rdma.c */
-extern struct workqueue_struct *svc_rdma_wq;
 extern int svc_rdma_init(void);
 extern void svc_rdma_cleanup(void);