coda: 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/coda/inode.c b/fs/coda/inode.c
index a1695dc..d97f993 100644 (file)
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -167,6 +167,10 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
                return -EBUSY;
        }
 
+       error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY);
+       if (error)
+               goto bdi_err;
+
        vc->vc_sb = sb;
 
        sb->s_fs_info = vc;
@@ -175,6 +179,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_blocksize_bits = 12;
        sb->s_magic = CODA_SUPER_MAGIC;
        sb->s_op = &coda_super_operations;
+       sb->s_bdi = &vc->bdi;
 
        /* get root fid from Venus: this needs the root inode */
        error = venus_rootfid(sb, &fid);
@@ -200,6 +205,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
         return 0;
 
  error:
+       bdi_destroy(&vc->bdi);
+ bdi_err:
        if (root)
                iput(root);
        if (vc)
@@ -210,6 +217,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
 
 static void coda_put_super(struct super_block *sb)
 {
+       bdi_destroy(&coda_vcp(sb)->bdi);
        coda_vcp(sb)->vc_sb = NULL;
        sb->s_fs_info = NULL;
 

diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h
index 5b5d473..644062e 100644 (file)
--- a/include/linux/coda_psdev.h
+++ b/include/linux/coda_psdev.h
@@ -1,6 +1,7 @@
 #ifndef __CODA_PSDEV_H
 #define __CODA_PSDEV_H
 
+#include <linux/backing-dev.h>
 #include <linux/magic.h>
 
 #define CODA_PSDEV_MAJOR 67
@@ -17,6 +18,7 @@ struct venus_comm {
        struct list_head    vc_processing;
        int                 vc_inuse;
        struct super_block *vc_sb;
+       struct backing_dev_info bdi;
 };