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@xxxxxxxxxx>
---
fs/nfs/super.c | 1 +
include/linux/nfs_fs_sb.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index a03b9c6..5edc613 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2530,6 +2530,7 @@ 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) {
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index b8cedce..a1c80a2 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -147,6 +147,7 @@ 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
--
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