From dcfd9b215b89d72c1053a717571d52bf96cc64f8 Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Tue, 28 Mar 2017 20:16:46 +0200
Subject: [PATCH] befs: make export work with cold dcache
based on commit b3b42c0deaa1
("fs/affs: make export work with cold dcache")
This adds get_parent function so that nfs client can still work after
cache drop (Tested on NFS v4 with echo 3 > /proc/sys/vm/drop_caches)
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
---
fs/befs/linuxvfs.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index c500e954debb..63e7c4760bfb 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -58,6 +58,7 @@ static struct dentry *befs_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type);
static struct dentry *befs_fh_to_parent(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type);
+static struct dentry *befs_get_parent(struct dentry *child);
static const struct super_operations befs_sops = {
.alloc_inode = befs_alloc_inode, /* allocate a new inode */
@@ -93,6 +94,7 @@ static const struct address_space_operations befs_symlink_aops = {
static const struct export_operations befs_export_operations = {
.fh_to_dentry = befs_fh_to_dentry,
.fh_to_parent = befs_fh_to_parent,
+ .get_parent = befs_get_parent,
};
/*
@@ -667,6 +669,19 @@ static struct dentry *befs_fh_to_parent(struct super_block *sb,
befs_nfs_get_inode);
}
+static struct dentry *befs_get_parent(struct dentry *child)
+{
+ struct inode *parent;
+ struct befs_inode_info *befs_ino = BEFS_I(d_inode(child));
+
+ parent = befs_iget(child->d_sb,
+ (unsigned long)befs_ino->i_parent.start);
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ return d_obtain_alias(parent);
+}
+
enum {
Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
};
--
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