[PATCH 2/6] hostfs: store inode in dentry after mkdir if possible.

[NeilBrown]

After handling a mkdir, get the inode for the name and use
d_splice_alias() to store the correct dentry in the dcache.

Signed-off-by: NeilBrown <neilb@xxxxxxx>
---
 fs/hostfs/hostfs_kern.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index ccbb48fe830d..a2c6b9051c5b 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -682,14 +682,22 @@ static int hostfs_symlink(struct mnt_idmap *idmap, struct inode *ino,
 static struct dentry *hostfs_mkdir(struct mnt_idmap *idmap, struct inode *ino,
 				   struct dentry *dentry, umode_t mode)
 {
+	struct inode *inode;
 	char *file;
 	int err;
 
 	if ((file = dentry_name(dentry)) == NULL)
 		return ERR_PTR(-ENOMEM);
 	err = do_mkdir(file, mode);
+	if (err) {
+		dentry = ERR_PTR(err);
+	} else {
+		inode = hostfs_iget(dentry->d_sb, file);
+		d_drop(dentry);
+		dentry = d_splice_alias(inode, dentry);
+	}
 	__putname(file);
-	return ERR_PTR(err);
+	return dentry;
 }
 
 static int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
-- 
2.47.1