1 files changed, 34 insertions, 71 deletions

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 652d3f7176a..2f8a29db0f1 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -31,6 +31,7 @@
 #include <linux/errno.h>
 #include <linux/unistd.h>
 #include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/addr.h>
 #include <linux/sunrpc/stats.h>
 #include <linux/sunrpc/metrics.h>
 #include <linux/sunrpc/xprtsock.h>
@@ -54,7 +55,6 @@
 #include <linux/parser.h>
 #include <linux/nsproxy.h>
 #include <linux/rcupdate.h>
-#include <linux/kthread.h>
 
 #include <asm/uaccess.h>
 
@@ -64,6 +64,7 @@
 #include "iostat.h"
 #include "internal.h"
 #include "fscache.h"
+#include "nfs4session.h"
 #include "pnfs.h"
 #include "nfs.h"
 
@@ -291,8 +292,9 @@ struct file_system_type nfs_fs_type = {
 	.name		= "nfs",
 	.mount		= nfs_fs_mount,
 	.kill_sb	= nfs_kill_super,
-	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
 };
+MODULE_ALIAS_FS("nfs");
 EXPORT_SYMBOL_GPL(nfs_fs_type);
 
 struct file_system_type nfs_xdev_fs_type = {
@@ -300,13 +302,14 @@ struct file_system_type nfs_xdev_fs_type = {
 	.name		= "nfs",
 	.mount		= nfs_xdev_mount,
 	.kill_sb	= nfs_kill_super,
-	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
 };
 
 const struct super_operations nfs_sops = {
 	.alloc_inode	= nfs_alloc_inode,
 	.destroy_inode	= nfs_destroy_inode,
 	.write_inode	= nfs_write_inode,
+	.drop_inode	= nfs_drop_inode,
 	.put_super	= nfs_put_super,
 	.statfs		= nfs_statfs,
 	.evict_inode	= nfs_evict_inode,
@@ -329,8 +332,10 @@ struct file_system_type nfs4_fs_type = {
 	.name		= "nfs4",
 	.mount		= nfs_fs_mount,
 	.kill_sb	= nfs_kill_super,
-	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
 };
+MODULE_ALIAS_FS("nfs4");
+MODULE_ALIAS("nfs4");
 EXPORT_SYMBOL_GPL(nfs4_fs_type);
 
 static int __init register_nfs4_fs(void)
@@ -416,54 +421,6 @@ void nfs_sb_deactive(struct super_block *sb)
 }
 EXPORT_SYMBOL_GPL(nfs_sb_deactive);
 
-static int nfs_deactivate_super_async_work(void *ptr)
-{
-	struct super_block *sb = ptr;
-
-	deactivate_super(sb);
-	module_put_and_exit(0);
-	return 0;
-}
-
-/*
- * same effect as deactivate_super, but will do final unmount in kthread
- * context
- */
-static void nfs_deactivate_super_async(struct super_block *sb)
-{
-	struct task_struct *task;
-	char buf[INET6_ADDRSTRLEN + 1];
-	struct nfs_server *server = NFS_SB(sb);
-	struct nfs_client *clp = server->nfs_client;
-
-	if (!atomic_add_unless(&sb->s_active, -1, 1)) {
-		rcu_read_lock();
-		snprintf(buf, sizeof(buf),
-			rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
-		rcu_read_unlock();
-
-		__module_get(THIS_MODULE);
-		task = kthread_run(nfs_deactivate_super_async_work, sb,
-				"%s-deactivate-super", buf);
-		if (IS_ERR(task)) {
-			pr_err("%s: kthread_run: %ld\n",
-				__func__, PTR_ERR(task));
-			/* make synchronous call and hope for the best */
-			deactivate_super(sb);
-			module_put(THIS_MODULE);
-		}
-	}
-}
-
-void nfs_sb_deactive_async(struct super_block *sb)
-{
-	struct nfs_server *server = NFS_SB(sb);
-
-	if (atomic_dec_and_test(&server->active))
-		nfs_deactivate_super_async(sb);
-}
-EXPORT_SYMBOL_GPL(nfs_sb_deactive_async);
-
 /*
  * Deliver file system statistics to userspace
  */
@@ -1150,7 +1107,7 @@ static int nfs_get_option_str(substring_t args[], char **option)
 {
 	kfree(*option);
 	*option = match_strdup(args);
-	return !option;
+	return !*option;
 }
 
 static int nfs_get_option_ul(substring_t args[], unsigned long *option)
@@ -2373,19 +2330,30 @@ static void nfs_get_cache_cookie(struct super_block *sb,
 				 struct nfs_parsed_mount_data *parsed,
 				 struct nfs_clone_mount *cloned)
 {
+	struct nfs_server *nfss = NFS_SB(sb);
 	char *uniq = NULL;
 	int ulen = 0;
 
-	if (parsed && parsed->fscache_uniq) {
-		uniq = parsed->fscache_uniq;
-		ulen = strlen(parsed->fscache_uniq);
+	nfss->fscache_key = NULL;
+	nfss->fscache = NULL;
+
+	if (parsed) {
+		if (!(parsed->options & NFS_OPTION_FSCACHE))
+			return;
+		if (parsed->fscache_uniq) {
+			uniq = parsed->fscache_uniq;
+			ulen = strlen(parsed->fscache_uniq);
+		}
 	} else if (cloned) {
 		struct nfs_server *mnt_s = NFS_SB(cloned->sb);
+		if (!(mnt_s->options & NFS_OPTION_FSCACHE))
+			return;
 		if (mnt_s->fscache_key) {
 			uniq = mnt_s->fscache_key->key.uniquifier;
 			ulen = mnt_s->fscache_key->key.uniq_len;
 		};
-	}
+	} else
+		return;
 
 	nfs_fscache_get_super_cookie(sb, uniq, ulen);
 }
@@ -2576,27 +2544,23 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags,
 	struct nfs_server *server;
 	struct dentry *mntroot = ERR_PTR(-ENOMEM);
 	struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod;
-	int error;
 
-	dprintk("--> nfs_xdev_mount_common()\n");
+	dprintk("--> nfs_xdev_mount()\n");
 
 	mount_info.mntfh = mount_info.cloned->fh;
 
 	/* create a new volume representation */
 	server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
-	if (IS_ERR(server)) {
-		error = PTR_ERR(server);
-		goto out_err;
-	}
 
-	mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, nfs_mod);
-	dprintk("<-- nfs_xdev_mount_common() = 0\n");
-out:
-	return mntroot;
+	if (IS_ERR(server))
+		mntroot = ERR_CAST(server);
+	else
+		mntroot = nfs_fs_mount_common(server, flags,
+				dev_name, &mount_info, nfs_mod);
 
-out_err:
-	dprintk("<-- nfs_xdev_mount_common() = %d [error]\n", error);
-	goto out;
+	dprintk("<-- nfs_xdev_mount() = %ld\n",
+			IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L);
+	return mntroot;
 }
 
 #if IS_ENABLED(CONFIG_NFS_V4)
@@ -2756,6 +2720,5 @@ module_param(send_implementation_id, ushort, 0644);
 MODULE_PARM_DESC(send_implementation_id,
 		"Send implementation ID with NFSv4.1 exchange_id");
 MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string");
-MODULE_ALIAS("nfs4");
 
 #endif /* CONFIG_NFS_V4 */