4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2011 Gunnar Beutner
26 #include <sys/zfs_vnops.h>
27 #include <sys/zfs_znode.h>
28 #include <sys/zfs_ctldir.h>
33 #ifdef HAVE_ENCODE_FH_WITH_INODE
34 zpl_encode_fh(struct inode *ip, __u32 *fh, int *max_len, struct inode *parent)
37 zpl_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, int connectable)
39 struct inode *ip = dentry->d_inode;
40 #endif /* HAVE_ENCODE_FH_WITH_INODE */
41 fid_t *fid = (fid_t *)fh;
44 len_bytes = *max_len * sizeof (__u32);
46 if (len_bytes < offsetof(fid_t, fid_data))
49 fid->fid_len = len_bytes - offsetof(fid_t, fid_data);
51 if (zfsctl_is_node(ip))
52 rc = zfsctl_fid(ip, fid);
54 rc = zfs_fid(ip, fid);
56 len_bytes = offsetof(fid_t, fid_data) + fid->fid_len;
57 *max_len = roundup(len_bytes, sizeof (__u32)) / sizeof (__u32);
59 return (rc == 0 ? FILEID_INO32_GEN : 255);
62 static struct dentry *
63 zpl_dentry_obtain_alias(struct inode *ip)
65 struct dentry *result;
67 #ifdef HAVE_D_OBTAIN_ALIAS
68 result = d_obtain_alias(ip);
70 result = d_alloc_anon(ip);
74 result = ERR_PTR(-ENOMEM);
76 #endif /* HAVE_D_OBTAIN_ALIAS */
81 static struct dentry *
82 zpl_fh_to_dentry(struct super_block *sb, struct fid *fh,
83 int fh_len, int fh_type)
85 fid_t *fid = (fid_t *)fh;
89 len_bytes = fh_len * sizeof (__u32);
91 if (fh_type != FILEID_INO32_GEN ||
92 len_bytes < offsetof(fid_t, fid_data) ||
93 len_bytes < offsetof(fid_t, fid_data) + fid->fid_len)
94 return ERR_PTR(-EINVAL);
96 rc = zfs_vget(sb, &ip, fid);
101 ASSERT((ip != NULL) && !IS_ERR(ip));
103 return zpl_dentry_obtain_alias(ip);
106 static struct dentry *
107 zpl_get_parent(struct dentry *child)
114 error = -zfs_lookup(child->d_inode, "..", &ip, 0, cr, NULL, NULL);
116 ASSERT3S(error, <=, 0);
119 return ERR_PTR(error);
121 return zpl_dentry_obtain_alias(ip);
124 const struct export_operations zpl_export_operations = {
125 .encode_fh = zpl_encode_fh,
126 .fh_to_dentry = zpl_fh_to_dentry,
127 .get_parent = zpl_get_parent