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Commit fa799759 authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Linus Torvalds
Browse files

mm: bdi: expose the BDI object in sysfs for NFS 



Register NFS' backing_dev_info under sysfs with the name "nfs-MAJOR:MINOR"

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cf0ca9fe

fs/nfs/super.c

+26 −0
Original line number Diff line number Diff line
@@ -1575,6 +1575,11 @@ static int nfs_compare_super(struct super_block *sb, void *data) 
	return nfs_compare_mount_options(sb, server, mntflags);

}



static int nfs_bdi_register(struct nfs_server *server)

{

	return bdi_register_dev(&server->backing_dev_info, server->s_dev);

}



static int nfs_get_sb(struct file_system_type *fs_type,

	int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)

{
@@ -1617,6 +1622,10 @@ static int nfs_get_sb(struct file_system_type *fs_type, 
	if (s->s_fs_info != server) {

		nfs_free_server(server);

		server = NULL;

	} else {

		error = nfs_bdi_register(server);

		if (error)

			goto error_splat_super;

	}



	if (!s->s_root) {
@@ -1664,6 +1673,7 @@ static void nfs_kill_super(struct super_block *s) 
{

	struct nfs_server *server = NFS_SB(s);



	bdi_unregister(&server->backing_dev_info);

	kill_anon_super(s);

	nfs_free_server(server);

}
@@ -1708,6 +1718,10 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, 
	if (s->s_fs_info != server) {

		nfs_free_server(server);

		server = NULL;

	} else {

		error = nfs_bdi_register(server);

		if (error)

			goto error_splat_super;

	}



	if (!s->s_root) {
@@ -1984,6 +1998,10 @@ static int nfs4_get_sb(struct file_system_type *fs_type, 
	if (s->s_fs_info != server) {

		nfs_free_server(server);

		server = NULL;

	} else {

		error = nfs_bdi_register(server);

		if (error)

			goto error_splat_super;

	}



	if (!s->s_root) {
@@ -2070,6 +2088,10 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, 
	if (s->s_fs_info != server) {

		nfs_free_server(server);

		server = NULL;

	} else {

		error = nfs_bdi_register(server);

		if (error)

			goto error_splat_super;

	}



	if (!s->s_root) {
@@ -2149,6 +2171,10 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, 
	if (s->s_fs_info != server) {

		nfs_free_server(server);

		server = NULL;

	} else {

		error = nfs_bdi_register(server);

		if (error)

			goto error_splat_super;

	}



	if (!s->s_root) {