afs: Convert to separately allocated bdi

Allocate struct backing_dev_info separately instead of embedding it
inside the superblock. This unifies handling of bdi among users.

CC: David Howells <dhowells@redhat.com>
CC: linux-afs@lists.infradead.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index a6901360fb81d435bf47a85b781a89a1056fd900..393672997cc23d4e5688dc77421ae81b0df95b48 100644 (file)
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -318,7 +318,6 @@ struct afs_volume {
        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 fbdb022b75a27be11b5699203f8c04e32c499cf6..c79633e5cfd80ce6754650dfb1a26890cf035205 100644 (file)
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -319,7 +319,10 @@ static int afs_fill_super(struct super_block *sb,
        sb->s_blocksize_bits    = PAGE_SHIFT;
        sb->s_magic             = AFS_FS_MAGIC;
        sb->s_op                = &afs_super_ops;
-       sb->s_bdi               = &as->volume->bdi;
+       ret = super_setup_bdi(sb);
+       if (ret)
+               return ret;
+       sb->s_bdi->ra_pages     = VM_MAX_READAHEAD * 1024 / PAGE_SIZE;
        strlcpy(sb->s_id, as->volume->vlocation->vldb.name, sizeof(sb->s_id));
 
        /* allocate the root inode and dentry */

diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 546f9d01710b5b66706331968edc557306ed848e..db73d6dad02b5f8f549cca6ccacdabaa9d458f63 100644 (file)
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -106,11 +106,6 @@ struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
        volume->cell            = params->cell;
        volume->vid             = vlocation->vldb.vid[params->type];
 
-       volume->bdi.ra_pages    = VM_MAX_READAHEAD*1024/PAGE_SIZE; 
-       ret = bdi_setup_and_register(&volume->bdi, "afs");
-       if (ret)
-               goto error_bdi;
-
        init_rwsem(&volume->server_sem);
 
        /* look up all the applicable server records */
@@ -156,8 +151,6 @@ 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--)
@@ -207,7 +200,6 @@ 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]");