ncpfs: add bdi backing to mount session

This ensures that dirty data gets flushed properly.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1be23e..fa3385154023 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -526,10 +526,15 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
         sb->s_blocksize_bits = 10;
         sb->s_magic = NCP_SUPER_MAGIC;
         sb->s_op = &ncp_sops;
+        sb->s_bdi = &server->bdi;
 
         server = NCP_SBP(sb);
         memset(server, 0, sizeof(*server));
 
+        error = bdi_setup_and_register(&server->bdi, "ncpfs", BDI_CAP_MAP_COPY);
+        if (error)
+                goto out_bdi;
+
         server->ncp_filp = ncp_filp;
         server->ncp_sock = sock;
         
@@ -719,6 +724,8 @@ out_fput2:
         if (server->info_filp)
                 fput(server->info_filp);
 out_fput:
+        bdi_destroy(&server->bdi);
+out_bdi:
         /* 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>:
          * 
          * The previously used put_filp(ncp_filp); was bogous, since
@@ -756,6 +763,7 @@ static void ncp_put_super(struct super_block *sb)
         kill_pid(server->m.wdog_pid, SIGTERM, 1);
         put_pid(server->m.wdog_pid);
 
+        bdi_destroy(&server->bdi);
         kfree(server->priv.data);
         kfree(server->auth.object_name);
         vfree(server->rxbuf);
diff --git a/include/linux/ncp_fs_sb.h b/include/linux/ncp_fs_sb.h
index 6330fc76b00f..5ec9ca671687 100644
--- a/include/linux/ncp_fs_sb.h
+++ b/include/linux/ncp_fs_sb.h
@@ -12,6 +12,7 @@
 #include <linux/ncp_mount.h>
 #include <linux/net.h>
 #include <linux/mutex.h>
+#include <linux/backing-dev.h>
 
 #ifdef __KERNEL__
 
@@ -127,6 +128,7 @@ struct ncp_server {
                 size_t len;
                 __u8 data[128];
         } unexpected_packet;
+        struct backing_dev_info bdi;
 };
 
 extern void ncp_tcp_rcv_proc(struct work_struct *work);