-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * NFS export of Lustre Light File System
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * Copyright (c) 2002, 2006 Cluster File Systems, Inc.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
- * Author: Yury Umanets <umka@clusterfs.com>
- * Huang Hua <huanghua@clusterfs.com>
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * Copyright (c) 2011, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * lustre/lustre/llite/llite_nfs.c
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * NFS export of Lustre Light File System
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Author: Yury Umanets <umka@clusterfs.com>
+ * Author: Huang Hua <huanghua@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LLITE
#include <lustre_lite.h>
#include "llite_internal.h"
-#ifdef HAVE_LINUX_EXPORTFS_H
#include <linux/exportfs.h>
-#endif
+
+__u32 get_uuid2int(const char *name, int len)
+{
+ __u32 key0 = 0x12a3fe2d, key1 = 0x37abe8f9;
+ while (len--) {
+ __u32 key = key1 + (key0 ^ (*name++ * 7152373));
+ if (key & 0x80000000) key -= 0x7fffffff;
+ key1 = key0;
+ key0 = key;
+ }
+ return (key0 << 1);
+}
static int ll_nfs_test_inode(struct inode *inode, void *opaque)
{
(struct lu_fid *)opaque);
}
-static struct inode *search_inode_for_lustre(struct super_block *sb,
- struct lu_fid *fid,
- int mode)
+struct inode *search_inode_for_lustre(struct super_block *sb,
+ const struct lu_fid *fid)
{
struct ll_sb_info *sbi = ll_s2sbi(sb);
struct ptlrpc_request *req = NULL;
struct inode *inode = NULL;
- unsigned long valid = 0;
int eadatalen = 0;
- ino_t ino = ll_fid_build_ino(sbi, fid);
+ unsigned long hash = cl_fid_build_ino(fid,
+ ll_need_32bit_api(sbi));
+ struct md_op_data *op_data;
int rc;
ENTRY;
- CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", ino, PFID(fid));
+ CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", hash, PFID(fid));
- inode = ILOOKUP(sb, ino, ll_nfs_test_inode, fid);
+ inode = ilookup5(sb, hash, ll_nfs_test_inode, (void *)fid);
if (inode)
RETURN(inode);
- if (S_ISREG(mode)) {
- rc = ll_get_max_mdsize(sbi, &eadatalen);
- if (rc)
- RETURN(ERR_PTR(rc));
- valid |= OBD_MD_FLEASIZE;
- }
+ rc = ll_get_max_mdsize(sbi, &eadatalen);
+ if (rc)
+ RETURN(ERR_PTR(rc));
- rc = md_getattr(sbi->ll_md_exp, fid, NULL, valid, eadatalen, &req);
+ /* Because inode is NULL, ll_prep_md_op_data can not
+ * be used here. So we allocate op_data ourselves */
+ OBD_ALLOC_PTR(op_data);
+ if (op_data == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ op_data->op_fid1 = *fid;
+ op_data->op_mode = eadatalen;
+ op_data->op_valid = OBD_MD_FLEASIZE;
+
+ /* mds_fid2dentry ignores f_type */
+ rc = md_getattr(sbi->ll_md_exp, op_data, &req);
+ OBD_FREE_PTR(op_data);
if (rc) {
- CERROR("can't get object attrs, fid "DFID", rc %d\n",
- PFID(fid), rc);
+ /* Suppress erroneous/confusing messages when NFS
+ * is out of sync and requests old data. */
+ CDEBUG(D_INFO, "can't get object attrs, fid "DFID", rc %d\n",
+ PFID(fid), rc);
RETURN(ERR_PTR(rc));
}
-
- rc = ll_prep_inode(&inode, req, REPLY_REC_OFF, sb);
+ rc = ll_prep_inode(&inode, req, sb, NULL);
ptlrpc_req_finished(req);
if (rc)
RETURN(ERR_PTR(rc));
RETURN(inode);
}
-extern struct dentry_operations ll_d_ops;
+struct lustre_nfs_fid {
+ struct lu_fid lnf_child;
+ struct lu_fid lnf_parent;
+};
-static struct dentry *ll_iget_for_nfs(struct super_block *sb,
- struct lu_fid *fid,
- umode_t mode)
+static struct dentry *
+ll_iget_for_nfs(struct super_block *sb, struct lu_fid *fid, struct lu_fid *parent)
{
struct inode *inode;
struct dentry *result;
ENTRY;
- CDEBUG(D_INFO, "Get dentry for fid: "DFID"\n", PFID(fid));
- if (!fid_is_sane(fid))
- RETURN(ERR_PTR(-ESTALE));
+ if (!fid_is_sane(fid))
+ RETURN(ERR_PTR(-ESTALE));
+
+ CDEBUG(D_INFO, "Get dentry for fid: "DFID"\n", PFID(fid));
- inode = search_inode_for_lustre(sb, fid, mode);
+ inode = search_inode_for_lustre(sb, fid);
if (IS_ERR(inode))
RETURN(ERR_PTR(PTR_ERR(inode)));
if (is_bad_inode(inode)) {
/* we didn't find the right inode.. */
- CERROR("can't get inode by fid "DFID"\n",
- PFID(fid));
iput(inode);
RETURN(ERR_PTR(-ESTALE));
}
- result = d_alloc_anon(inode);
- if (!result) {
- iput(inode);
- RETURN(ERR_PTR(-ENOMEM));
- }
- ll_set_dd(result);
- result->d_op = &ll_d_ops;
+ /**
+ * It is an anonymous dentry without OST objects created yet.
+ * We have to find the parent to tell MDS how to init lov objects.
+ */
+ if (S_ISREG(inode->i_mode) && !ll_i2info(inode)->lli_has_smd &&
+ parent != NULL && !fid_is_zero(parent)) {
+ struct ll_inode_info *lli = ll_i2info(inode);
+
+ spin_lock(&lli->lli_lock);
+ lli->lli_pfid = *parent;
+ spin_unlock(&lli->lli_lock);
+ }
+
+ result = d_obtain_alias(inode);
+ if (IS_ERR(result)) {
+ iput(inode);
+ RETURN(result);
+ }
+
RETURN(result);
}
-/*
- * This length is counted as amount of __u32,
- * It is composed of a fid and a mode
+#ifndef FILEID_INVALID
+#define FILEID_INVALID 0xff
+#endif
+#ifndef FILEID_LUSTRE
+#define FILEID_LUSTRE 0x97
+#endif
+
+/**
+ * \a connectable - is nfsd will connect himself or this should be done
+ * at lustre
+ *
+ * The return value is file handle type:
+ * 1 -- contains child file handle;
+ * 2 -- contains child file handle and parent file handle;
+ * 255 -- error.
*/
-#define ONE_FH_LEN (sizeof(struct lu_fid)/4 + 1)
+#ifndef HAVE_ENCODE_FH_PARENT
+static int ll_encode_fh(struct dentry *de, __u32 *fh, int *plen,
+ int connectable)
+{
+ struct inode *inode = de->d_inode;
+ struct inode *parent = de->d_parent->d_inode;
+#else
+static int ll_encode_fh(struct inode *inode, __u32 *fh, int *plen,
+ struct inode *parent)
+{
+#endif
+ int fileid_len = sizeof(struct lustre_nfs_fid) / 4;
+ struct lustre_nfs_fid *nfs_fid = (void *)fh;
+ ENTRY;
+
+ CDEBUG(D_INFO, "%s: encoding for ("DFID") maxlen=%d minlen=%d\n",
+ ll_get_fsname(inode->i_sb, NULL, 0),
+ PFID(ll_inode2fid(inode)), *plen, fileid_len);
+
+ if (*plen < fileid_len) {
+ *plen = fileid_len;
+ RETURN(FILEID_INVALID);
+ }
+
+ nfs_fid->lnf_child = *ll_inode2fid(inode);
+ if (parent != NULL)
+ nfs_fid->lnf_parent = *ll_inode2fid(parent);
+ else
+ fid_zero(&nfs_fid->lnf_parent);
+ *plen = fileid_len;
+
+ RETURN(FILEID_LUSTRE);
+}
+
+static int ll_nfs_get_name_filldir(void *cookie, const char *name, int namelen,
+ loff_t hash, u64 ino, unsigned type)
+{
+ /* It is hack to access lde_fid for comparison with lgd_fid.
+ * So the input 'name' must be part of the 'lu_dirent'. */
+ struct lu_dirent *lde = container_of0(name, struct lu_dirent, lde_name);
+ struct ll_getname_data *lgd = cookie;
+ struct lu_fid fid;
+
+ fid_le_to_cpu(&fid, &lde->lde_fid);
+ if (lu_fid_eq(&fid, &lgd->lgd_fid)) {
+ memcpy(lgd->lgd_name, name, namelen);
+ lgd->lgd_name[namelen] = 0;
+ lgd->lgd_found = 1;
+ }
+ return lgd->lgd_found;
+}
-static struct dentry *ll_decode_fh(struct super_block *sb, __u32 *fh, int fh_len,
- int fh_type,
- int (*acceptable)(void *, struct dentry *),
- void *context)
+static int ll_get_name(struct dentry *dentry, char *name,
+ struct dentry *child)
{
- struct lu_fid *parent = NULL;
- struct lu_fid *child;
- struct dentry *entry;
+ struct inode *dir = dentry->d_inode;
+ struct ll_getname_data lgd;
+ __u64 offset = 0;
+ int rc;
ENTRY;
- CDEBUG(D_INFO, "decoding for "DFID" fh_len=%d fh_type=%d\n",
- PFID((struct lu_fid*)fh), fh_len, fh_type);
+ if (!dir || !S_ISDIR(dir->i_mode))
+ GOTO(out, rc = -ENOTDIR);
- if (fh_type != 1 && fh_type != 2)
- RETURN(ERR_PTR(-ESTALE));
- if (fh_len < ONE_FH_LEN * fh_type)
- RETURN(ERR_PTR(-ESTALE));
+ if (!dir->i_fop)
+ GOTO(out, rc = -EINVAL);
+
+ lgd.lgd_name = name;
+ lgd.lgd_fid = ll_i2info(child->d_inode)->lli_fid;
+ lgd.lgd_found = 0;
- child = (struct lu_fid*)fh;
- if (fh_type == 2)
- parent = (struct lu_fid*)(fh + ONE_FH_LEN);
-
- entry = sb->s_export_op->find_exported_dentry(sb, child, parent,
- acceptable, context);
- RETURN(entry);
+ mutex_lock(&dir->i_mutex);
+ rc = ll_dir_read(dir, &offset, &lgd, ll_nfs_get_name_filldir);
+ mutex_unlock(&dir->i_mutex);
+ if (!rc && !lgd.lgd_found)
+ rc = -ENOENT;
+ EXIT;
+
+out:
+ return rc;
}
-/* The return value is file handle type:
- * 1 -- contains child file handle;
- * 2 -- contains child file handle and parent file handle;
- * 255 -- error.
- */
-static int ll_encode_fh(struct dentry *de, __u32 *fh, int *plen, int connectable)
+static struct dentry *ll_fh_to_dentry(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
{
- struct inode *inode = de->d_inode;
- struct lu_fid *fid = ll_inode2fid(inode);
- ENTRY;
+ struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid;
- CDEBUG(D_INFO, "encoding for (%lu,"DFID") maxlen=%d minlen=%d\n",
- inode->i_ino, PFID(fid), *plen, ONE_FH_LEN);
-
- if (*plen < ONE_FH_LEN)
- RETURN(255);
-
- memcpy((char*)fh, fid, sizeof(*fid));
- *(fh + ONE_FH_LEN - 1) = (__u32)(S_IFMT & inode->i_mode);
-
- if (de->d_parent && *plen >= ONE_FH_LEN * 2) {
- struct inode *parent = de->d_parent->d_inode;
- fh += ONE_FH_LEN;
- memcpy((char*)fh, &ll_i2info(parent)->lli_fid, sizeof(*fid));
- *(fh + ONE_FH_LEN - 1) = (__u32)(S_IFMT & parent->i_mode);
- *plen = ONE_FH_LEN * 2;
- RETURN(2);
- } else {
- *plen = ONE_FH_LEN;
- RETURN(1);
- }
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
+
+ RETURN(ll_iget_for_nfs(sb, &nfs_fid->lnf_child, &nfs_fid->lnf_parent));
}
-static struct dentry *ll_get_dentry(struct super_block *sb, void *data)
+static struct dentry *ll_fh_to_parent(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
{
- struct lu_fid *fid;
- struct dentry *entry;
- __u32 mode;
- ENTRY;
+ struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid;
+
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
- fid = (struct lu_fid *)data;
- mode = *((__u32*)data + ONE_FH_LEN - 1);
-
- entry = ll_iget_for_nfs(sb, fid, mode);
- RETURN(entry);
+ RETURN(ll_iget_for_nfs(sb, &nfs_fid->lnf_parent, NULL));
}
static struct dentry *ll_get_parent(struct dentry *dchild)
struct dentry *result = NULL;
struct mdt_body *body;
static char dotdot[] = "..";
+ struct md_op_data *op_data;
int rc;
+ int lmmsize;
ENTRY;
-
- LASSERT(dir && S_ISDIR(dir->i_mode));
-
- sbi = ll_s2sbi(dir->i_sb);
-
- CDEBUG(D_INFO, "getting parent for (%lu,"DFID")\n",
- dir->i_ino, PFID(ll_inode2fid(dir)));
- rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(dir), NULL,
- dotdot, strlen(dotdot) + 1, 0, 0,
- ll_i2suppgid(dir), &req);
- if (rc) {
- CERROR("failure %d inode %lu get parent\n", rc, dir->i_ino);
- RETURN(ERR_PTR(rc));
- }
- body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*body));
-
- LASSERT(body->valid & OBD_MD_FLID);
-
- CDEBUG(D_INFO, "parent for "DFID" is "DFID"\n",
- PFID(ll_inode2fid(dir)), PFID(&body->fid1));
+ LASSERT(dir && S_ISDIR(dir->i_mode));
- result = ll_iget_for_nfs(dir->i_sb, &body->fid1, S_IFDIR);
+ sbi = ll_s2sbi(dir->i_sb);
- ptlrpc_req_finished(req);
- RETURN(result);
-}
+ CDEBUG(D_INFO, "%s: getting parent for ("DFID")\n",
+ ll_get_fsname(dir->i_sb, NULL, 0),
+ PFID(ll_inode2fid(dir)));
+
+ rc = ll_get_max_mdsize(sbi, &lmmsize);
+ if (rc != 0)
+ RETURN(ERR_PTR(rc));
+
+ op_data = ll_prep_md_op_data(NULL, dir, NULL, dotdot,
+ strlen(dotdot), lmmsize,
+ LUSTRE_OPC_ANY, NULL);
+ if (IS_ERR(op_data))
+ RETURN((void *)op_data);
+
+ rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
+ ll_finish_md_op_data(op_data);
+ if (rc) {
+ CERROR("%s: failure inode "DFID" get parent: rc = %d\n",
+ ll_get_fsname(dir->i_sb, NULL, 0),
+ PFID(ll_inode2fid(dir)), rc);
+ RETURN(ERR_PTR(rc));
+ }
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ /*
+ * LU-3952: MDT may lost the FID of its parent, we should not crash
+ * the NFS server, ll_iget_for_nfs() will handle the error.
+ */
+ if (body->valid & OBD_MD_FLID) {
+ CDEBUG(D_INFO, "parent for "DFID" is "DFID"\n",
+ PFID(ll_inode2fid(dir)), PFID(&body->fid1));
+ }
+ result = ll_iget_for_nfs(dir->i_sb, &body->fid1, NULL);
+
+ ptlrpc_req_finished(req);
+ RETURN(result);
+}
struct export_operations lustre_export_operations = {
.get_parent = ll_get_parent,
- .get_dentry = ll_get_dentry,
.encode_fh = ll_encode_fh,
- .decode_fh = ll_decode_fh,
+ .get_name = ll_get_name,
+ .fh_to_dentry = ll_fh_to_dentry,
+ .fh_to_parent = ll_fh_to_parent,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff