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)
Suggested-by: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
---
fs/affs/namei.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index fb88446..a3df8a6 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -447,6 +447,24 @@ affs_rename(struct inode *old_dir, struct dentry *old_dentry,
return retval;
}
+static struct dentry *affs_get_parent(struct dentry *child)
+{
+ struct inode *parent;
+ struct buffer_head *bh;
+
+ bh = affs_bread(child->d_sb, d_inode(child)->i_ino);
+ if (IS_ERR(bh))
+ return ERR_CAST(bh);
+
+ parent = affs_iget(child->d_sb,
+ be32_to_cpu(AFFS_TAIL(child->d_sb, bh)->parent));
+ brelse(bh);
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ return d_obtain_alias(parent);
+}
+
static struct inode *affs_nfs_get_inode(struct super_block *sb, u64 ino,
u32 generation)
{
@@ -484,6 +502,7 @@ static struct dentry *affs_fh_to_parent(struct super_block *sb, struct fid *fid,
const struct export_operations affs_export_ops = {
.fh_to_dentry = affs_fh_to_dentry,
.fh_to_parent = affs_fh_to_parent,
+ .get_parent = affs_get_parent,
};
const struct dentry_operations affs_dentry_operations = {
--
2.9.3
--
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