diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/llite_nfs.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/llite_nfs.c | 375 |
1 files changed, 0 insertions, 375 deletions
diff --git a/drivers/staging/lustre/lustre/llite/llite_nfs.c b/drivers/staging/lustre/lustre/llite/llite_nfs.c deleted file mode 100644 index 14172688d55f..000000000000 --- a/drivers/staging/lustre/lustre/llite/llite_nfs.c +++ /dev/null @@ -1,375 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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). - * - * 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 - * - * GPL HEADER END - */ -/* - * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2012, 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 - * - * Author: Yury Umanets <umka@clusterfs.com> - * Author: Huang Hua <huanghua@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_LLITE -#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); -} - -void get_uuid2fsid(const char *name, int len, __kernel_fsid_t *fsid) -{ - __u64 key = 0, key0 = 0x12a3fe2d, key1 = 0x37abe8f9; - - while (len--) { - key = key1 + (key0 ^ (*name++ * 7152373)); - if (key & 0x8000000000000000ULL) - key -= 0x7fffffffffffffffULL; - key1 = key0; - key0 = key; - } - - fsid->val[0] = key; - fsid->val[1] = key >> 32; -} - -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; - - 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 - */ - op_data = kzalloc(sizeof(*op_data), GFP_NOFS); - 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); - kfree(op_data); - if (rc) { - 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; -} - -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, struct lu_fid *parent) -{ - struct inode *inode; - struct dentry *result; - - 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_CAST(inode); - - if (is_bad_inode(inode)) { - /* we didn't find the right inode.. */ - iput(inode); - return ERR_PTR(-ESTALE); - } - - result = d_obtain_alias(inode); - if (IS_ERR(result)) { - iput(inode); - return result; - } - - /** - * In case d_obtain_alias() found a disconnected dentry, always update - * lli_pfid to allow later operation (normally open) have parent fid, - * which may be used by MDS to create data. - */ - if (parent) { - struct ll_inode_info *lli = ll_i2info(inode); - - spin_lock(&lli->lli_lock); - lli->lli_pfid = *parent; - spin_unlock(&lli->lli_lock); - } - - /* N.B. d_obtain_alias() drops inode ref on error */ - result = d_obtain_alias(inode); - if (!IS_ERR(result)) { - /* - * Need to signal to the ll_intent_file_open that - * we came from NFS and so opencache needs to be - * enabled for this one - */ - ll_d2d(result)->lld_nfs_dentry = 1; - } - - return result; -} - -/** - * \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_nfs_fid) / 4; - struct lustre_nfs_fid *nfs_fid = (void *)fh; - - 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) - 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(struct dir_context *ctx, const char *name, - int namelen, loff_t hash, u64 ino, - unsigned int 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_of((void*)name, struct lu_dirent, lde_name); - struct ll_getname_data *lgd = - container_of(ctx, struct ll_getname_data, ctx); - 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 int ll_get_name(struct dentry *dentry, char *name, - struct dentry *child) -{ - struct inode *dir = d_inode(dentry); - int rc; - struct ll_getname_data lgd = { - .lgd_name = name, - .lgd_fid = ll_i2info(d_inode(child))->lli_fid, - .ctx.actor = ll_nfs_get_name_filldir, - }; - struct md_op_data *op_data; - __u64 pos = 0; - - if (!dir || !S_ISDIR(dir->i_mode)) { - rc = -ENOTDIR; - goto out; - } - - if (!dir->i_fop) { - rc = -EINVAL; - goto out; - } - - op_data = ll_prep_md_op_data(NULL, dir, dir, NULL, 0, 0, - LUSTRE_OPC_ANY, dir); - if (IS_ERR(op_data)) { - rc = PTR_ERR(op_data); - goto out; - } - - op_data->op_max_pages = ll_i2sbi(dir)->ll_md_brw_pages; - inode_lock(dir); - rc = ll_dir_read(dir, &pos, op_data, &lgd.ctx); - inode_unlock(dir); - ll_finish_md_op_data(op_data); - if (!rc && !lgd.lgd_found) - rc = -ENOENT; -out: - return rc; -} - -static struct dentry *ll_fh_to_dentry(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) -{ - struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid; - - 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_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) -{ - struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid; - - if (fh_type != FILEID_LUSTRE) - return ERR_PTR(-EPROTO); - - return ll_iget_for_nfs(sb, &nfs_fid->lnf_parent, NULL); -} - -int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid) -{ - 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; - - LASSERT(dir && S_ISDIR(dir->i_mode)); - - sbi = ll_s2sbi(dir->i_sb); - - CDEBUG(D_INFO, "%s: getting parent for (" DFID ")\n", - ll_get_fsname(dir->i_sb, NULL, 0), - 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) { - CERROR("%s: failure inode " DFID " get parent: rc = %d\n", - ll_get_fsname(dir->i_sb, NULL, 0), - 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; -} - -static struct dentry *ll_get_parent(struct dentry *dchild) -{ - struct lu_fid parent_fid = { 0 }; - struct dentry *dentry; - int rc; - - rc = ll_dir_get_parent_fid(dchild->d_inode, &parent_fid); - if (rc) - return ERR_PTR(rc); - - dentry = ll_iget_for_nfs(dchild->d_inode->i_sb, &parent_fid, NULL); - - return dentry; -} - -const 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, -}; |