From 425115e377c8a5334299265e3b4daa713fa967b0 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Mon, 11 Aug 2008 15:00:03 -0700
Subject: [PATCH] kclient: mkdir to mksnap

---
 src/kernel/dir.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/src/kernel/dir.c b/src/kernel/dir.c
index 82a0f649bac77..2fc97595c08bc 100644
--- a/src/kernel/dir.c
+++ b/src/kernel/dir.c
@@ -483,6 +483,54 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
 	return err;
 }
 
+static int ceph_mksnap(struct inode *dir, struct dentry *dentry)
+{
+	struct ceph_client *client = ceph_sb_to_client(dir->i_sb);
+	struct ceph_mds_client *mdsc = &client->mdsc;
+	struct ceph_mds_request *req;
+	struct ceph_mds_request_head *rhead;
+	char *path;
+	int pathlen;
+	u64 pathbase;
+	int err;
+	char *snap;
+	int snaplen;
+	struct dentry *dirdentry = d_find_alias(dir);
+
+	snaplen = dentry->d_name.len;
+	snap = kmalloc(snaplen + 1, GFP_NOFS);
+	memcpy(snap, dentry->d_name.name, snaplen);
+	snap[snaplen] = 0;
+
+	dout(5, "dir_mksnap in dir %p name '%s' dn %p\n", dir, snap, dentry);
+	path = ceph_build_dentry_path(dirdentry, &pathlen, &pathbase, 1);
+	if (IS_ERR(path))
+		return PTR_ERR(path);
+	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKSNAP,
+				       pathbase, path, 
+				       0, snap,
+				       dentry, USE_AUTH_MDS);
+	kfree(path);
+	if (IS_ERR(req)) {
+		dout(40, "d_drop %p\n", dentry);
+		d_drop(dentry);
+		return PTR_ERR(req);
+	}
+
+	dget(dentry);                /* to match put_request below */
+	req->r_last_dentry = dentry; /* use this dentry in fill_trace */
+	req->r_locked_dir = dir;
+	rhead = req->r_request->front.iov_base;
+	err = ceph_mdsc_do_request(mdsc, req);
+	ceph_mdsc_put_request(req);
+	if (err < 0) {
+		dout(40, "d_drop %p\n", dentry);
+		d_drop(dentry);
+	}
+	return err;
+
+}
+
 static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	struct ceph_client *client = ceph_sb_to_client(dir->i_sb);
@@ -494,6 +542,9 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 	u64 pathbase;
 	int err;
 
+	if (ceph_vino(dir).snap == CEPH_SNAPDIR)
+		return ceph_mksnap(dir, dentry);
+
 	dout(5, "dir_mkdir in dir %p dentry %p mode 0%o\n", dir, dentry, mode);
 	path = ceph_build_dentry_path(dentry, &pathlen, &pathbase, 1);
 	if (IS_ERR(path))
-- 
2.39.5