From: Sage Weil <sage@newdream.net>
Date: Wed, 6 Apr 2011 16:35:00 +0000 (-0700)
Subject: ceph: avoid inode lookup on nfs fh reconnect
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=45e3d3eeb6578e523e100622266945ecd71723bb;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ceph: avoid inode lookup on nfs fh reconnect

If we get the inode from the MDS, we have a reference in req; don't do a
fresh lookup.

Signed-off-by: Sage Weil <sage@newdream.net>
---

diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index f1828af09912..a610d3d67488 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -107,8 +107,10 @@ static struct dentry *__fh_to_dentry(struct super_block *sb,
 		req->r_ino1 = vino;
 		req->r_num_caps = 1;
 		err = ceph_mdsc_do_request(mdsc, NULL, req);
+		inode = req->r_target_inode;
+		if (inode)
+			igrab(inode);
 		ceph_mdsc_put_request(req);
-		inode = ceph_find_inode(sb, vino);
 		if (!inode)
 			return ERR_PTR(-ESTALE);
 	}
@@ -163,8 +165,10 @@ static struct dentry *__cfh_to_dentry(struct super_block *sb,
 		snprintf(req->r_path2, 16, "%d", cfh->parent_name_hash);
 		req->r_num_caps = 1;
 		err = ceph_mdsc_do_request(mdsc, NULL, req);
+		inode = req->r_target_inode;
+		if (inode)
+			igrab(inode);
 		ceph_mdsc_put_request(req);
-		inode = ceph_find_inode(sb, vino);
 		if (!inode)
 			return ERR_PTR(err ? err : -ESTALE);
 	}