afs: add bdi backing to mount session.

This ensures that dirty data gets flushed properly.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index a353e69e2391..401eeb21869f 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -106,6 +106,10 @@ struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
         volume->cell            = params->cell;
         volume->vid             = vlocation->vldb.vid[params->type];
 
+        ret = bdi_setup_and_register(&volume->bdi, "afs", BDI_CAP_MAP_COPY);
+        if (ret)
+                goto error_bdi;
+
         init_rwsem(&volume->server_sem);
 
         /* look up all the applicable server records */
@@ -151,6 +155,8 @@ error:
         return ERR_PTR(ret);
 
 error_discard:
+        bdi_destroy(&volume->bdi);
+error_bdi:
         up_write(&params->cell->vl_sem);
 
         for (loop = volume->nservers - 1; loop >= 0; loop--)
@@ -200,6 +206,7 @@ void afs_put_volume(struct afs_volume *volume)
         for (loop = volume->nservers - 1; loop >= 0; loop--)
                 afs_put_server(volume->servers[loop]);
 
+        bdi_destroy(&volume->bdi);
         kfree(volume);
 
         _leave(" [destroyed]");