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NFS: Add a super_block backpointer to the nfs_server struct

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NFS_SB() returns the pointer to an nfs_server struct, given a
pointer to a super_block.  But we have no way to go back the other
way.

Add a super_block backpointer field so that, given an nfs_server
struct, it is easy to get to the filesystem's root dentry.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2013-10-17 14:12:56 -04:00 committed by Trond Myklebust
parent b03d735b4c
commit ce6cda1845
2 changed files with 2 additions and 0 deletions
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1
fs/nfs/super.c
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@ -2534,6 +2534,7 @@ struct dentry *nfs_fs_mount_common(struct nfs_server *server,
mntroot = ERR_PTR(error);
goto error_splat_bdi;
}
server->super = s;
}
if (!s->s_root) {

1
include/linux/nfs_fs_sb.h
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@ -148,6 +148,7 @@ struct nfs_server {
__u64 maxfilesize; /* maximum file size */
struct timespec time_delta; /* smallest time granularity */
unsigned long mount_time; /* when this fs was mounted */
struct super_block *super; /* VFS super block */
dev_t s_dev; /* superblock dev numbers */
#ifdef CONFIG_NFS_FSCACHE