fs/affs: make export work with cold dcache (b3b42c0d) · Commits · 戴 / test

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) [weiyongjun1@huawei.com: fix return value check in affs_get_parent()] Link: http://lkml.kernel.org/r/20170123141018.2331-1-weiyj.lk@gmail.com Link: http://lkml.kernel.org/r/20170109191208.6085-8-fabf@skynet.be Signed-off-by:

Alexander Viro <viro@zeniv.linux.org.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:

fs/affs/namei.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -447,6 +447,24 @@ done:
		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 (!bh)
		return ERR_PTR(-EIO);

		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 = {