ceph: switch to use of ->d_init()

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

fs/ceph/dir.c

@@ -32,33 +32,19 @@ const struct dentry_operations ceph_dentry_ops;
 /*
  * Initialize ceph dentry state.
  */
-int ceph_init_dentry(struct dentry *dentry)
+static int ceph_d_init(struct dentry *dentry)
 {
 	struct ceph_dentry_info *di;
 
-	if (dentry->d_fsdata)
-		return 0;
-
 	di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL);
 	if (!di)
 		return -ENOMEM;          /* oh well */
 
-	spin_lock(&dentry->d_lock);
-	if (dentry->d_fsdata) {
-		/* lost a race */
-		kmem_cache_free(ceph_dentry_cachep, di);
-		goto out_unlock;
-	}
-
 	di->dentry = dentry;
 	di->lease_session = NULL;
 	di->time = jiffies;
-	/* avoid reordering d_fsdata setup so that the check above is safe */
-	smp_mb();
 	dentry->d_fsdata = di;
 	ceph_dentry_lru_add(dentry);
-out_unlock:
-	spin_unlock(&dentry->d_lock);
 	return 0;
 }
 
@@ -730,10 +716,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 	if (dentry->d_name.len > NAME_MAX)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	err = ceph_init_dentry(dentry);
-	if (err < 0)
-		return ERR_PTR(err);
-
 	/* can we conclude ENOENT locally? */
 	if (d_really_is_negative(dentry)) {
 		struct ceph_inode_info *ci = ceph_inode(dir);
@@ -1503,4 +1485,5 @@ const struct dentry_operations ceph_dentry_ops = {
 	.d_revalidate = ceph_d_revalidate,
 	.d_release = ceph_d_release,
 	.d_prune = ceph_d_prune,
+	.d_init = ceph_d_init,
 };

fs/ceph/export.c

@@ -62,7 +62,6 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
 {
 	struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
 	struct inode *inode;
-	struct dentry *dentry;
 	struct ceph_vino vino;
 	int err;
 
@@ -94,16 +93,7 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
 			return ERR_PTR(-ESTALE);
 	}
 
-	dentry = d_obtain_alias(inode);
-	if (IS_ERR(dentry))
-		return dentry;
-	err = ceph_init_dentry(dentry);
-	if (err < 0) {
-		dput(dentry);
-		return ERR_PTR(err);
-	}
-	dout("__fh_to_dentry %llx %p dentry %p\n", ino, inode, dentry);
-	return dentry;
+	return d_obtain_alias(inode);
 }
 
 /*
@@ -131,7 +121,6 @@ static struct dentry *__get_parent(struct super_block *sb,
 	struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
 	struct ceph_mds_request *req;
 	struct inode *inode;
-	struct dentry *dentry;
 	int mask;
 	int err;
 
@@ -164,18 +153,7 @@ static struct dentry *__get_parent(struct super_block *sb,
 	if (!inode)
 		return ERR_PTR(-ENOENT);
 
-	dentry = d_obtain_alias(inode);
-	if (IS_ERR(dentry))
-		return dentry;
-	err = ceph_init_dentry(dentry);
-	if (err < 0) {
-		dput(dentry);
-		return ERR_PTR(err);
-	}
-	dout("__get_parent ino %llx parent %p ino %llx.%llx\n",
-	     child ? ceph_ino(d_inode(child)) : ino,
-	     dentry, ceph_vinop(inode));
-	return dentry;
+	return d_obtain_alias(inode);
 }
 
 static struct dentry *ceph_get_parent(struct dentry *child)

fs/ceph/file.c

@@ -351,10 +351,6 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
 	if (dentry->d_name.len > NAME_MAX)
 		return -ENAMETOOLONG;
 
-	err = ceph_init_dentry(dentry);
-	if (err < 0)
-		return err;
-
 	if (flags & O_CREAT) {
 		err = ceph_pre_init_acls(dir, &mode, &acls);
 		if (err < 0)

fs/ceph/inode.c

@@ -1203,12 +1203,7 @@ retry_lookup:
 					err = -ENOMEM;
 					goto done;
 				}
-				err = ceph_init_dentry(dn);
-				if (err < 0) {
-					dput(dn);
-					dput(parent);
-					goto done;
-				}
+				err = 0;
 			} else if (d_really_is_positive(dn) &&
 				   (ceph_ino(d_inode(dn)) != vino.ino ||
 				    ceph_snap(d_inode(dn)) != vino.snap)) {
@@ -1561,12 +1556,6 @@ retry_lookup:
 				err = -ENOMEM;
 				goto out;
 			}
-			ret = ceph_init_dentry(dn);
-			if (ret < 0) {
-				dput(dn);
-				err = ret;
-				goto out;
-			}
 		} else if (d_really_is_positive(dn) &&
 			   (ceph_ino(d_inode(dn)) != vino.ino ||
 			    ceph_snap(d_inode(dn)) != vino.snap)) {

fs/ceph/super.c

@@ -795,7 +795,6 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
 			root = ERR_PTR(-ENOMEM);
 			goto out;
 		}
-		ceph_init_dentry(root);
 		dout("open_root_inode success, root dentry is %p\n", root);
 	} else {
 		root = ERR_PTR(err);

fs/ceph/super.h

@@ -950,13 +950,6 @@ extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
 
-/*
- * our d_ops vary depending on whether the inode is live,
- * snapshotted (read-only), or a virtual ".snap" directory.
- */
-int ceph_init_dentry(struct dentry *dentry);
-
-
 /* ioctl.c */
 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);