CIFS: Move async read to ops struct

Signed-off-by: NPavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: NSteve French <smfrench@gmail.com>

fs/cifs/cifsglob.h

@@ -172,6 +172,7 @@ struct dfs_info3_param;
 struct cifs_fattr;
 struct smb_vol;
 struct cifs_fid;
+struct cifs_readdata;
 
 struct smb_version_operations {
 	int (*send_cancel)(struct TCP_Server_Info *, void *,
@@ -280,6 +281,8 @@ struct smb_version_operations {
 	int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
 	/* send a flush request to the server */
 	int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
+	/* async read from the server */
+	int (*async_readv)(struct cifs_readdata *);
 };
 
 struct smb_version_values {

fs/cifs/file.c

@@ -2488,6 +2488,9 @@ static int
 cifs_retry_async_readv(struct cifs_readdata *rdata)
 {
 	int rc;
+	struct TCP_Server_Info *server;
+
+	server = tlink_tcon(rdata->cfile->tlink)->ses->server;
 
 	do {
 		if (rdata->cfile->invalidHandle) {
@@ -2495,7 +2498,7 @@ cifs_retry_async_readv(struct cifs_readdata *rdata)
 			if (rc != 0)
 				continue;
 		}
-		rc = cifs_async_readv(rdata);
+		rc = server->ops->async_readv(rdata);
 	} while (rc == -EAGAIN);
 
 	return rc;
@@ -2647,6 +2650,9 @@ cifs_iovec_read(struct file *file, const struct iovec *iov,
 	open_file = file->private_data;
 	tcon = tlink_tcon(open_file->tlink);
 
+	if (!tcon->ses->server->ops->async_readv)
+		return -ENOSYS;
+
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
 		pid = open_file->pid;
 	else

fs/cifs/smb1ops.c

@@ -785,6 +785,7 @@ struct smb_version_operations smb1_operations = {
 	.set_fid = cifs_set_fid,
 	.close = cifs_close_file,
 	.flush = cifs_flush_file,
+	.async_readv = cifs_async_readv,
 };
 
 struct smb_version_values smb1_values = {

fs/cifs/smb2maperror.c

@@ -2455,7 +2455,8 @@ map_smb2_to_linux_error(char *buf, bool log_err)
 		return 0;
 
 	/* mask facility */
-	if (log_err && (smb2err != (STATUS_MORE_PROCESSING_REQUIRED)))
+	if (log_err && (smb2err != STATUS_MORE_PROCESSING_REQUIRED) &&
+	    (smb2err != STATUS_END_OF_FILE))
 		smb2_print_status(smb2err);
 	else if (cifsFYI & CIFS_RC)
 		smb2_print_status(smb2err);