X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fllite%2Fllite_nfs.c;h=4907d68c77f2ec5d7c9c37e7446635f9f776c51f;hb=da63a46c51e86953dc62db76b8fa4d1a0f1aef4d;hp=2d3540590787c43c0b3b3ed36c160f211542d0e6;hpb=89f9a5bced24ecb7c84040a1ed88dcef4384f7c6;p=fs%2Flustre-release.git diff --git a/lustre/llite/llite_nfs.c b/lustre/llite/llite_nfs.c index 2d35405..4907d68 100644 --- a/lustre/llite/llite_nfs.c +++ b/lustre/llite/llite_nfs.c @@ -1,181 +1,379 @@ -/* -*- 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 + * Author: Huang Hua */ #define DEBUG_SUBSYSTEM S_LLITE -#include #include "llite_internal.h" +#include + +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 lustre_id id; - __u64 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_dt_exp, NULL); - valid |= OBD_MD_FLEASIZE; - } - id_type(&id) = mode; - id_ino(&id) = (__u64)ino; - id_gen(&id) = generation; - - rc = md_getattr(sbi->ll_md_exp, &id, valid, NULL, 0, - eadatalen, &req); - if (rc) { - CERROR("failure %d inode %lu\n", rc, ino); - return ERR_PTR(rc); - } - - rc = ll_prep_inode(sbi->ll_dt_exp, sbi->ll_md_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, +};