Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1 | /* |
| 2 | * GPL HEADER START |
| 3 | * |
| 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 only, |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License version 2 for more details (a copy is included |
| 14 | * in the LICENSE file that accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * version 2 along with this program; If not, see |
Oleg Drokin | 6a5b99a | 2016-06-14 23:33:40 -0400 | [diff] [blame] | 18 | * http://www.gnu.org/licenses/gpl-2.0.html |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 19 | * |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 20 | * GPL HEADER END |
| 21 | */ |
| 22 | /* |
| 23 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| 24 | * Use is subject to license terms. |
| 25 | * |
| 26 | * Copyright (c) 2011, 2012, Intel Corporation. |
| 27 | */ |
| 28 | /* |
| 29 | * This file is part of Lustre, http://www.lustre.org/ |
| 30 | * Lustre is a trademark of Sun Microsystems, Inc. |
| 31 | * |
| 32 | * lustre/lustre/llite/llite_nfs.c |
| 33 | * |
| 34 | * NFS export of Lustre Light File System |
| 35 | * |
| 36 | * Author: Yury Umanets <umka@clusterfs.com> |
| 37 | * Author: Huang Hua <huanghua@clusterfs.com> |
| 38 | */ |
| 39 | |
| 40 | #define DEBUG_SUBSYSTEM S_LLITE |
Greg Kroah-Hartman | 67a235f | 2014-07-11 21:51:41 -0700 | [diff] [blame] | 41 | #include "../include/lustre_lite.h" |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 42 | #include "llite_internal.h" |
| 43 | #include <linux/exportfs.h> |
| 44 | |
| 45 | __u32 get_uuid2int(const char *name, int len) |
| 46 | { |
| 47 | __u32 key0 = 0x12a3fe2d, key1 = 0x37abe8f9; |
Mike Rapoport | 50ffcb7 | 2015-10-13 16:03:40 +0300 | [diff] [blame] | 48 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 49 | while (len--) { |
| 50 | __u32 key = key1 + (key0 ^ (*name++ * 7152373)); |
Josep Puigdemont | 5b39bd5 | 2014-06-01 20:23:16 +0200 | [diff] [blame] | 51 | |
| 52 | if (key & 0x80000000) |
| 53 | key -= 0x7fffffff; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 54 | key1 = key0; |
| 55 | key0 = key; |
| 56 | } |
| 57 | return (key0 << 1); |
| 58 | } |
| 59 | |
Fan Yong | bd99407 | 2013-07-23 00:07:01 +0800 | [diff] [blame] | 60 | void get_uuid2fsid(const char *name, int len, __kernel_fsid_t *fsid) |
| 61 | { |
| 62 | __u64 key = 0, key0 = 0x12a3fe2d, key1 = 0x37abe8f9; |
| 63 | |
| 64 | while (len--) { |
| 65 | key = key1 + (key0 ^ (*name++ * 7152373)); |
| 66 | if (key & 0x8000000000000000ULL) |
| 67 | key -= 0x7fffffffffffffffULL; |
| 68 | key1 = key0; |
| 69 | key0 = key; |
| 70 | } |
| 71 | |
| 72 | fsid->val[0] = key; |
| 73 | fsid->val[1] = key >> 32; |
| 74 | } |
| 75 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 76 | static int ll_nfs_test_inode(struct inode *inode, void *opaque) |
| 77 | { |
Amitoj Kaur Chawla | 3e127cb | 2015-10-13 18:50:18 +0530 | [diff] [blame] | 78 | return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | struct inode *search_inode_for_lustre(struct super_block *sb, |
| 82 | const struct lu_fid *fid) |
| 83 | { |
| 84 | struct ll_sb_info *sbi = ll_s2sbi(sb); |
| 85 | struct ptlrpc_request *req = NULL; |
| 86 | struct inode *inode = NULL; |
| 87 | int eadatalen = 0; |
| 88 | unsigned long hash = cl_fid_build_ino(fid, |
| 89 | ll_need_32bit_api(sbi)); |
| 90 | struct md_op_data *op_data; |
| 91 | int rc; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 92 | |
| 93 | CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", hash, PFID(fid)); |
| 94 | |
| 95 | inode = ilookup5(sb, hash, ll_nfs_test_inode, (void *)fid); |
| 96 | if (inode) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 97 | return inode; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 98 | |
Brian Behlendorf | 4477934 | 2014-04-27 13:06:47 -0400 | [diff] [blame] | 99 | rc = ll_get_default_mdsize(sbi, &eadatalen); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 100 | if (rc) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 101 | return ERR_PTR(rc); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 102 | |
| 103 | /* Because inode is NULL, ll_prep_md_op_data can not |
Oleg Drokin | c0894c6 | 2016-02-24 22:00:30 -0500 | [diff] [blame] | 104 | * be used here. So we allocate op_data ourselves |
| 105 | */ |
Julia Lawall | 496a51b | 2014-09-18 22:24:02 +0200 | [diff] [blame] | 106 | op_data = kzalloc(sizeof(*op_data), GFP_NOFS); |
| 107 | if (!op_data) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 108 | return ERR_PTR(-ENOMEM); |
| 109 | |
| 110 | op_data->op_fid1 = *fid; |
| 111 | op_data->op_mode = eadatalen; |
| 112 | op_data->op_valid = OBD_MD_FLEASIZE; |
| 113 | |
| 114 | /* mds_fid2dentry ignores f_type */ |
| 115 | rc = md_getattr(sbi->ll_md_exp, op_data, &req); |
Julia Lawall | 97903a2 | 2015-04-12 22:55:02 +0200 | [diff] [blame] | 116 | kfree(op_data); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 117 | if (rc) { |
Dmitry Eremin | ac7af34 | 2016-04-27 18:20:54 -0400 | [diff] [blame] | 118 | CDEBUG(D_INFO, "can't get object attrs, fid "DFID", rc %d\n", |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 119 | PFID(fid), rc); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 120 | return ERR_PTR(rc); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 121 | } |
| 122 | rc = ll_prep_inode(&inode, req, sb, NULL); |
| 123 | ptlrpc_req_finished(req); |
| 124 | if (rc) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 125 | return ERR_PTR(rc); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 126 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 127 | return inode; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | struct lustre_nfs_fid { |
| 131 | struct lu_fid lnf_child; |
| 132 | struct lu_fid lnf_parent; |
| 133 | }; |
| 134 | |
| 135 | static struct dentry * |
| 136 | ll_iget_for_nfs(struct super_block *sb, struct lu_fid *fid, struct lu_fid *parent) |
| 137 | { |
| 138 | struct inode *inode; |
| 139 | struct dentry *result; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 140 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 141 | if (!fid_is_sane(fid)) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 142 | return ERR_PTR(-ESTALE); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 143 | |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 144 | CDEBUG(D_INFO, "Get dentry for fid: " DFID "\n", PFID(fid)); |
| 145 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 146 | inode = search_inode_for_lustre(sb, fid); |
| 147 | if (IS_ERR(inode)) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 148 | return ERR_CAST(inode); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 149 | |
| 150 | if (is_bad_inode(inode)) { |
| 151 | /* we didn't find the right inode.. */ |
| 152 | iput(inode); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 153 | return ERR_PTR(-ESTALE); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /** |
| 157 | * It is an anonymous dentry without OST objects created yet. |
| 158 | * We have to find the parent to tell MDS how to init lov objects. |
| 159 | */ |
| 160 | if (S_ISREG(inode->i_mode) && !ll_i2info(inode)->lli_has_smd && |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 161 | parent && !fid_is_zero(parent)) { |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 162 | struct ll_inode_info *lli = ll_i2info(inode); |
| 163 | |
| 164 | spin_lock(&lli->lli_lock); |
| 165 | lli->lli_pfid = *parent; |
| 166 | spin_unlock(&lli->lli_lock); |
| 167 | } |
| 168 | |
Andrew Perepechko | 7f830d8 | 2015-09-14 18:41:29 -0400 | [diff] [blame] | 169 | /* N.B. d_obtain_alias() drops inode ref on error */ |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 170 | result = d_obtain_alias(inode); |
Oleg Drokin | 6dad4d8 | 2016-06-20 16:55:45 -0400 | [diff] [blame] | 171 | if (!IS_ERR(result)) { |
| 172 | int rc; |
| 173 | |
| 174 | rc = ll_d_init(result); |
| 175 | if (rc < 0) { |
| 176 | dput(result); |
| 177 | result = ERR_PTR(rc); |
| 178 | } else { |
| 179 | struct ll_dentry_data *ldd = ll_d2d(result); |
| 180 | |
| 181 | /* |
| 182 | * Need to signal to the ll_intent_file_open that |
| 183 | * we came from NFS and so opencache needs to be |
| 184 | * enabled for this one |
| 185 | */ |
| 186 | ldd->lld_nfs_dentry = 1; |
| 187 | } |
| 188 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 189 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 190 | return result; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 191 | } |
| 192 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 193 | /** |
| 194 | * \a connectable - is nfsd will connect himself or this should be done |
| 195 | * at lustre |
| 196 | * |
| 197 | * The return value is file handle type: |
| 198 | * 1 -- contains child file handle; |
| 199 | * 2 -- contains child file handle and parent file handle; |
| 200 | * 255 -- error. |
| 201 | */ |
| 202 | static int ll_encode_fh(struct inode *inode, __u32 *fh, int *plen, |
| 203 | struct inode *parent) |
| 204 | { |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 205 | int fileid_len = sizeof(struct lustre_nfs_fid) / 4; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 206 | struct lustre_nfs_fid *nfs_fid = (void *)fh; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 207 | |
James Nunez | 97a075c | 2016-04-27 18:21:01 -0400 | [diff] [blame] | 208 | CDEBUG(D_INFO, "%s: encoding for ("DFID") maxlen=%d minlen=%d\n", |
| 209 | ll_get_fsname(inode->i_sb, NULL, 0), |
| 210 | PFID(ll_inode2fid(inode)), *plen, fileid_len); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 211 | |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 212 | if (*plen < fileid_len) { |
| 213 | *plen = fileid_len; |
| 214 | return FILEID_INVALID; |
| 215 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 216 | |
| 217 | nfs_fid->lnf_child = *ll_inode2fid(inode); |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 218 | if (parent) |
| 219 | nfs_fid->lnf_parent = *ll_inode2fid(parent); |
| 220 | else |
| 221 | fid_zero(&nfs_fid->lnf_parent); |
| 222 | *plen = fileid_len; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 223 | |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 224 | return FILEID_LUSTRE; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 225 | } |
| 226 | |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 227 | static int ll_nfs_get_name_filldir(struct dir_context *ctx, const char *name, |
| 228 | int namelen, loff_t hash, u64 ino, |
| 229 | unsigned type) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 230 | { |
| 231 | /* It is hack to access lde_fid for comparison with lgd_fid. |
Oleg Drokin | c0894c6 | 2016-02-24 22:00:30 -0500 | [diff] [blame] | 232 | * So the input 'name' must be part of the 'lu_dirent'. |
| 233 | */ |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 234 | struct lu_dirent *lde = container_of0(name, struct lu_dirent, lde_name); |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 235 | struct ll_getname_data *lgd = |
| 236 | container_of(ctx, struct ll_getname_data, ctx); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 237 | struct lu_fid fid; |
| 238 | |
| 239 | fid_le_to_cpu(&fid, &lde->lde_fid); |
| 240 | if (lu_fid_eq(&fid, &lgd->lgd_fid)) { |
| 241 | memcpy(lgd->lgd_name, name, namelen); |
| 242 | lgd->lgd_name[namelen] = 0; |
| 243 | lgd->lgd_found = 1; |
| 244 | } |
| 245 | return lgd->lgd_found; |
| 246 | } |
| 247 | |
| 248 | static int ll_get_name(struct dentry *dentry, char *name, |
| 249 | struct dentry *child) |
| 250 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 251 | struct inode *dir = d_inode(dentry); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 252 | int rc; |
Peng Tao | 0b09d38 | 2013-07-15 22:27:19 +0800 | [diff] [blame] | 253 | struct ll_getname_data lgd = { |
| 254 | .lgd_name = name, |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 255 | .lgd_fid = ll_i2info(d_inode(child))->lli_fid, |
Peng Tao | 0b09d38 | 2013-07-15 22:27:19 +0800 | [diff] [blame] | 256 | .ctx.actor = ll_nfs_get_name_filldir, |
| 257 | }; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 258 | |
Julia Lawall | 34e1f2b | 2014-08-30 16:24:55 +0200 | [diff] [blame] | 259 | if (!dir || !S_ISDIR(dir->i_mode)) { |
| 260 | rc = -ENOTDIR; |
| 261 | goto out; |
| 262 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 263 | |
Julia Lawall | 34e1f2b | 2014-08-30 16:24:55 +0200 | [diff] [blame] | 264 | if (!dir->i_fop) { |
| 265 | rc = -EINVAL; |
| 266 | goto out; |
| 267 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 268 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 269 | inode_lock(dir); |
Peng Tao | 0b09d38 | 2013-07-15 22:27:19 +0800 | [diff] [blame] | 270 | rc = ll_dir_read(dir, &lgd.ctx); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 271 | inode_unlock(dir); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 272 | if (!rc && !lgd.lgd_found) |
| 273 | rc = -ENOENT; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 274 | out: |
| 275 | return rc; |
| 276 | } |
| 277 | |
| 278 | static struct dentry *ll_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| 279 | int fh_len, int fh_type) |
| 280 | { |
| 281 | struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid; |
| 282 | |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 283 | if (fh_type != FILEID_LUSTRE) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 284 | return ERR_PTR(-EPROTO); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 285 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 286 | return ll_iget_for_nfs(sb, &nfs_fid->lnf_child, &nfs_fid->lnf_parent); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static struct dentry *ll_fh_to_parent(struct super_block *sb, struct fid *fid, |
| 290 | int fh_len, int fh_type) |
| 291 | { |
| 292 | struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid; |
| 293 | |
Dmitry Eremin | cb77659 | 2016-02-14 19:13:52 -0500 | [diff] [blame] | 294 | if (fh_type != FILEID_LUSTRE) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 295 | return ERR_PTR(-EPROTO); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 296 | |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 297 | return ll_iget_for_nfs(sb, &nfs_fid->lnf_parent, NULL); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static struct dentry *ll_get_parent(struct dentry *dchild) |
| 301 | { |
| 302 | struct ptlrpc_request *req = NULL; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 303 | struct inode *dir = d_inode(dchild); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 304 | struct ll_sb_info *sbi; |
| 305 | struct dentry *result = NULL; |
| 306 | struct mdt_body *body; |
| 307 | static char dotdot[] = ".."; |
| 308 | struct md_op_data *op_data; |
| 309 | int rc; |
| 310 | int lmmsize; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 311 | |
| 312 | LASSERT(dir && S_ISDIR(dir->i_mode)); |
| 313 | |
| 314 | sbi = ll_s2sbi(dir->i_sb); |
| 315 | |
James Nunez | 97a075c | 2016-04-27 18:21:01 -0400 | [diff] [blame] | 316 | CDEBUG(D_INFO, "%s: getting parent for ("DFID")\n", |
| 317 | ll_get_fsname(dir->i_sb, NULL, 0), |
| 318 | PFID(ll_inode2fid(dir))); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 319 | |
Brian Behlendorf | 4477934 | 2014-04-27 13:06:47 -0400 | [diff] [blame] | 320 | rc = ll_get_default_mdsize(sbi, &lmmsize); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 321 | if (rc != 0) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 322 | return ERR_PTR(rc); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 323 | |
| 324 | op_data = ll_prep_md_op_data(NULL, dir, NULL, dotdot, |
| 325 | strlen(dotdot), lmmsize, |
| 326 | LUSTRE_OPC_ANY, NULL); |
| 327 | if (IS_ERR(op_data)) |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 328 | return (void *)op_data; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 329 | |
| 330 | rc = md_getattr_name(sbi->ll_md_exp, op_data, &req); |
| 331 | ll_finish_md_op_data(op_data); |
| 332 | if (rc) { |
James Nunez | 97a075c | 2016-04-27 18:21:01 -0400 | [diff] [blame] | 333 | CERROR("%s: failure inode "DFID" get parent: rc = %d\n", |
| 334 | ll_get_fsname(dir->i_sb, NULL, 0), |
| 335 | PFID(ll_inode2fid(dir)), rc); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 336 | return ERR_PTR(rc); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 337 | } |
| 338 | body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); |
Bobi Jam | 1e5a6fa | 2016-05-04 10:28:52 -0400 | [diff] [blame] | 339 | /* |
| 340 | * LU-3952: MDT may lost the FID of its parent, we should not crash |
| 341 | * the NFS server, ll_iget_for_nfs() will handle the error. |
| 342 | */ |
| 343 | if (body->valid & OBD_MD_FLID) { |
| 344 | CDEBUG(D_INFO, "parent for " DFID " is " DFID "\n", |
| 345 | PFID(ll_inode2fid(dir)), PFID(&body->fid1)); |
| 346 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 347 | result = ll_iget_for_nfs(dir->i_sb, &body->fid1, NULL); |
| 348 | |
| 349 | ptlrpc_req_finished(req); |
Greg Kroah-Hartman | 0a3bdb0 | 2013-08-03 10:35:28 +0800 | [diff] [blame] | 350 | return result; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 351 | } |
| 352 | |
Julia Lawall | 98aa766 | 2016-01-01 10:02:03 +0100 | [diff] [blame] | 353 | const struct export_operations lustre_export_operations = { |
Oleg Drokin | 22ea97f | 2016-02-26 01:50:10 -0500 | [diff] [blame] | 354 | .get_parent = ll_get_parent, |
| 355 | .encode_fh = ll_encode_fh, |
| 356 | .get_name = ll_get_name, |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 357 | .fh_to_dentry = ll_fh_to_dentry, |
| 358 | .fh_to_parent = ll_fh_to_parent, |
| 359 | }; |