-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * NFS export of Lustre Light File System
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * 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 file is part of Lustre, http://www.lustre.org.
+ * 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).
*
- * 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.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * 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.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/lustre/llite/llite_nfs.c
+ *
+ * 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 <linux/lustre_lite.h>
#include "llite_internal.h"
+#include <linux/exportfs.h>
+
+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);
+}
+
+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;
+ int eadatalen = 0;
+ 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", hash, PFID(fid));
+
+ inode = ilookup5(sb, hash, ll_test_inode_by_fid, (void *)fid);
+ if (inode)
+ RETURN(inode);
+
+ rc = ll_get_default_mdsize(sbi, &eadatalen);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ /*
+ * 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)
+ 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) {
+ /*
+ * 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, sb, NULL);
+ ptlrpc_req_finished(req);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ RETURN(inode);
+}
+
+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;
+
+ 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);
+ if (IS_ERR(inode))
+ RETURN(ERR_PTR(PTR_ERR(inode)));
+
+ if (is_bad_inode(inode)) {
+ /* we didn't find the right inode.. */
+ iput(inode);
+ RETURN(ERR_PTR(-ESTALE));
+ }
+
+ /* N.B. d_obtain_alias() drops inode ref on error */
+ result = d_obtain_alias(inode);
+ if (!IS_ERR(result)) {
+ int rc;
+
+ rc = ll_d_init(result);
+ if (rc < 0) {
+ dput(result);
+ result = ERR_PTR(rc);
+ } else {
+ struct ll_dentry_data *ldd = ll_d2d(result);
+
+ /*
+ * Need to signal to the ll_file_open that
+ * we came from NFS and so opencache needs to be
+ * enabled for this one
+ */
+ spin_lock(&result->d_lock);
+ ldd->lld_nfs_dentry = 1;
+ spin_unlock(&result->d_lock);
+ }
+ }
+
+ RETURN(result);
+}
+
+#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.
+ */
+static int ll_encode_fh(struct inode *inode, u32 *fh, int *plen,
+ struct inode *parent)
+{
+ int fileid_len = sizeof(struct lustre_file_handle) / 4;
+ struct lustre_file_handle *lfh = (void *)fh;
+
+ ENTRY;
+
+ CDEBUG(D_INFO, "%s: encoding for ("DFID") maxlen=%d minlen=%d\n",
+ ll_i2sbi(inode)->ll_fsname,
+ PFID(ll_inode2fid(inode)), *plen, fileid_len);
+
+ if (*plen < fileid_len) {
+ *plen = fileid_len;
+ RETURN(FILEID_INVALID);
+ }
+
+ lfh->lfh_child = *ll_inode2fid(inode);
+ if (parent)
+ lfh->lfh_parent = *ll_inode2fid(parent);
+ else
+ fid_zero(&lfh->lfh_parent);
+ *plen = fileid_len;
+
+ RETURN(FILEID_LUSTRE);
+}
-__u32 get_uuid2int(const char *name, int len)
+static int
+#ifndef HAVE_FILLDIR_USE_CTX
+ll_nfs_get_name_filldir(void *cookie, const char *name, int namelen,
+ loff_t hash, u64 ino, unsigned type)
{
- __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);
+ struct ll_getname_data *lgd = cookie;
+#else
+ll_nfs_get_name_filldir(struct dir_context *ctx, const char *name, int namelen,
+ loff_t hash, u64 ino, unsigned type)
+{
+ struct ll_getname_data *lgd =
+ container_of(ctx, struct ll_getname_data, ctx);
+#endif /* HAVE_FILLDIR_USE_CTX */
+ /*
+ * It is hack to access lde_fid for comparison with lgd_fid.
+ * So the input 'name' must be part of the 'lu_dirent', and
+ * so must appear to be a non-const pointer to an empty array.
+ */
+ char (*n)[0] = (void *)name;
+ struct lu_dirent *lde = container_of0(n, struct lu_dirent, lde_name);
+ 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 inode * search_inode_for_lustre(struct super_block *sb,
- unsigned long ino,
- unsigned long generation,
- int mode)
+static int ll_get_name(struct dentry *dentry, char *name,
+ struct dentry *child)
{
- struct ptlrpc_request *req = NULL;
- struct ll_sb_info *sbi = ll_s2sbi(sb);
- struct ll_fid fid;
- unsigned long valid = 0;
- int eadatalen = 0, rc;
- struct inode *inode = NULL;
-
- inode = ILOOKUP(sb, ino, NULL, NULL);
-
- if (inode)
- return inode;
- if (S_ISREG(mode)) {
- eadatalen = obd_size_diskmd(sbi->ll_osc_exp, NULL);
- valid |= OBD_MD_FLEASIZE;
- }
- fid.id = (__u64)ino;
- fid.generation = generation;
- fid.f_type = mode;
-
- rc = md_getattr(sbi->ll_mdc_exp, &fid, valid, eadatalen, &req);
- if (rc) {
- CERROR("failure %d inode %lu\n", rc, ino);
- return ERR_PTR(rc);
- }
-
- rc = ll_prep_inode(sbi->ll_osc_exp, sbi->ll_mdc_exp,
- &inode, req, 0, sb);
- if (rc) {
- ptlrpc_req_finished(req);
- return ERR_PTR(rc);
- }
- ptlrpc_req_finished(req);
-
- return inode;
+ struct inode *dir = dentry->d_inode;
+ struct ll_getname_data lgd = {
+ .lgd_name = name,
+ .lgd_fid = ll_i2info(child->d_inode)->lli_fid,
+#ifdef HAVE_DIR_CONTEXT
+ .ctx.actor = ll_nfs_get_name_filldir,
+#endif
+ .lgd_found = 0,
+ };
+ struct md_op_data *op_data;
+ u64 pos = 0;
+ int rc;
+
+ ENTRY;
+
+ if (!dir || !S_ISDIR(dir->i_mode))
+ GOTO(out, rc = -ENOTDIR);
+
+ if (!dir->i_fop)
+ GOTO(out, rc = -EINVAL);
+
+ op_data = ll_prep_md_op_data(NULL, dir, dir, NULL, 0, 0,
+ LUSTRE_OPC_ANY, dir);
+ if (IS_ERR(op_data))
+ GOTO(out, rc = PTR_ERR(op_data));
+
+ inode_lock(dir);
+#ifdef HAVE_DIR_CONTEXT
+ rc = ll_dir_read(dir, &pos, op_data, &lgd.ctx);
+#else
+ rc = ll_dir_read(dir, &pos, op_data, &lgd, ll_nfs_get_name_filldir);
+#endif
+ inode_unlock(dir);
+ ll_finish_md_op_data(op_data);
+ if (!rc && !lgd.lgd_found)
+ rc = -ENOENT;
+ EXIT;
+out:
+ return rc;
}
-extern struct dentry_operations ll_d_ops;
+static struct dentry *ll_fh_to_dentry(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid;
+
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
-static struct dentry *ll_iget_for_nfs(struct super_block *sb, unsigned long ino,
- __u32 generation, umode_t mode)
+ RETURN(ll_iget_for_nfs(sb, &lfh->lfh_child, &lfh->lfh_parent));
+}
+
+static struct dentry *ll_fh_to_parent(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
{
- struct inode *inode;
- struct dentry *result;
- struct list_head *lp;
-
- if (ino == 0)
- return ERR_PTR(-ESTALE);
-
- inode = search_inode_for_lustre(sb, ino, generation, mode);
- if (IS_ERR(inode)) {
- return ERR_PTR(PTR_ERR(inode));
- }
- if (is_bad_inode(inode)
- || (generation && inode->i_generation != generation)
- ){
- /* we didn't find the right inode.. */
- CERROR(" Inode %lu, Bad count: %lu %d or version %u %u\n",
- inode->i_ino,
- (unsigned long)inode->i_nlink,
- atomic_read(&inode->i_count),
- inode->i_generation,
- generation);
- iput(inode);
- return ERR_PTR(-ESTALE);
- }
-
- /* now to find a dentry.
- * If possible, get a well-connected one
- */
- spin_lock(&dcache_lock);
- for (lp = inode->i_dentry.next; lp != &inode->i_dentry ; lp=lp->next) {
- result = list_entry(lp,struct dentry, d_alias);
- if (!(result->d_flags & DCACHE_DISCONNECTED)) {
- dget_locked(result);
- ll_set_dflags(result, DCACHE_REFERENCED);
- spin_unlock(&dcache_lock);
- iput(inode);
- return result;
- }
- }
- spin_unlock(&dcache_lock);
- result = d_alloc_root(inode);
- if (result == NULL) {
- iput(inode);
- return ERR_PTR(-ENOMEM);
- }
- result->d_flags |= DCACHE_DISCONNECTED;
-
- ll_set_dd(result);
- result->d_op = &ll_d_ops;
- return result;
+ struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid;
+
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
+
+ RETURN(ll_iget_for_nfs(sb, &lfh->lfh_parent, NULL));
}
-struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len,
- int fhtype, int parent)
+int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid)
{
- switch (fhtype) {
- case 2:
- if (len < 5)
- break;
- if (parent)
- return ll_iget_for_nfs(sb, data[3], 0, data[4]);
- case 1:
- if (len < 3)
- break;
- if (parent)
- break;
- return ll_iget_for_nfs(sb, data[0], data[1], data[2]);
- default: break;
- }
- return ERR_PTR(-EINVAL);
+ struct ptlrpc_request *req = NULL;
+ struct ll_sb_info *sbi;
+ struct mdt_body *body;
+ static const 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, "%s: getting parent for ("DFID")\n",
+ sbi->ll_fsname, PFID(ll_inode2fid(dir)));
+
+ rc = ll_get_default_mdsize(sbi, &lmmsize);
+ if (rc != 0)
+ RETURN(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(PTR_ERR(op_data));
+
+ rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
+ ll_finish_md_op_data(op_data);
+ if (rc != 0) {
+ CERROR("%s: failure inode "DFID" get parent: rc = %d\n",
+ sbi->ll_fsname, PFID(ll_inode2fid(dir)), rc);
+ RETURN(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->mbo_valid & OBD_MD_FLID) {
+ CDEBUG(D_INFO, "parent for "DFID" is "DFID"\n",
+ PFID(ll_inode2fid(dir)), PFID(&body->mbo_fid1));
+ *parent_fid = body->mbo_fid1;
+ }
+
+ ptlrpc_req_finished(req);
+ RETURN(0);
}
-int ll_dentry_to_fh(struct dentry *dentry, __u32 *datap, int *lenp,
- int need_parent)
+static struct dentry *ll_get_parent(struct dentry *dchild)
{
- if (*lenp < 3)
- return 255;
- *datap++ = dentry->d_inode->i_ino;
- *datap++ = dentry->d_inode->i_generation;
- *datap++ = (__u32)(S_IFMT & dentry->d_inode->i_mode);
-
- if (*lenp == 3 || S_ISDIR(dentry->d_inode->i_mode)) {
- *lenp = 3;
- return 1;
- }
- if (dentry->d_parent) {
- *datap++ = dentry->d_parent->d_inode->i_ino;
- *datap++ = (__u32)(S_IFMT & dentry->d_parent->d_inode->i_mode);
-
- *lenp = 5;
- return 2;
- }
- *lenp = 3;
- return 1;
+ struct lu_fid parent_fid = { 0 };
+ int rc;
+ struct dentry *dentry;
+
+ ENTRY;
+
+ rc = ll_dir_get_parent_fid(dchild->d_inode, &parent_fid);
+ if (rc != 0)
+ RETURN(ERR_PTR(rc));
+
+ dentry = ll_iget_for_nfs(dchild->d_inode->i_sb, &parent_fid, NULL);
+
+ RETURN(dentry);
}
+
+struct export_operations lustre_export_operations = {
+ .get_parent = ll_get_parent,
+ .encode_fh = ll_encode_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