afs: add bdi backing to mount session.
This ensures that dirty data gets flushed properly.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index c54dad4..a10f258 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -19,6 +19,7 @@
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <linux/fscache.h>
+#include <linux/backing-dev.h>
#include "afs.h"
#include "afs_vl.h"
@@ -313,6 +314,7 @@
unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
struct rw_semaphore server_sem; /* lock for accessing current server */
+ struct backing_dev_info bdi;
};
/*
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 14f6431..e932e5a 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -311,6 +311,7 @@
sb->s_magic = AFS_FS_MAGIC;
sb->s_op = &afs_super_ops;
sb->s_fs_info = as;
+ sb->s_bdi = &as->volume->bdi;
/* allocate the root inode and dentry */
fid.vid = as->volume->vid;
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index a353e69..401eeb2 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -106,6 +106,10 @@
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 @@
return ERR_PTR(ret);
error_discard:
+ bdi_destroy(&volume->bdi);
+error_bdi:
up_write(¶ms->cell->vl_sem);
for (loop = volume->nservers - 1; loop >= 0; loop--)
@@ -200,6 +206,7 @@
for (loop = volume->nservers - 1; loop >= 0; loop--)
afs_put_server(volume->servers[loop]);
+ bdi_destroy(&volume->bdi);
kfree(volume);
_leave(" [destroyed]");