X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fllite%2Fllite_nfs.c;h=414f9354d3403fd7a690de3764576253b4c6a763;hp=f3b7fc3cb088d9a2d0e0f35dce605fd42aebcf28;hb=b0f08a4e902411a8fbdb660e5b32c5821ca7159f;hpb=c5050e412572b00cbe93d8517d2d1f767bebfa92 diff --git a/lustre/llite/llite_nfs.c b/lustre/llite/llite_nfs.c index f3b7fc3..414f935 100644 --- a/lustre/llite/llite_nfs.c +++ b/lustre/llite/llite_nfs.c @@ -1,29 +1,52 @@ -/* -*- 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.sun.com/software/products/lustre/docs/GPLv2.pdf * - * 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. + * 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. * - * 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. + * 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 + * Author: Huang Hua */ #define DEBUG_SUBSYSTEM S_LLITE -#include +#include #include "llite_internal.h" +#ifdef HAVE_LINUX_EXPORTFS_H +#include +#endif __u32 get_uuid2int(const char *name, int len) { @@ -37,143 +60,306 @@ __u32 get_uuid2int(const char *name, int len) return (key0 << 1); } -static struct inode * search_inode_for_lustre(struct super_block *sb, - unsigned long ino, - unsigned long generation, - int mode) +static int ll_nfs_test_inode(struct inode *inode, void *opaque) { + return lu_fid_eq(&ll_i2info(inode)->lli_fid, + (struct lu_fid *)opaque); +} + +static 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 ll_sb_info *sbi = ll_s2sbi(sb); - struct ll_fid fid; - unsigned long valid = 0; - int eadatalen = 0, rc; - struct inode *inode = NULL; + struct inode *inode = NULL; + int eadatalen = 0; + unsigned long hash = (unsigned long) cl_fid_build_ino(fid, 0); + struct md_op_data *op_data; + int rc; + ENTRY; - inode = ILOOKUP(sb, ino, NULL, NULL); + CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", hash, PFID(fid)); + inode = ilookup5(sb, hash, ll_nfs_test_inode, (void *)fid); 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; + RETURN(inode); - rc = mdc_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_get_max_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 == NULL) + return ERR_PTR(-ENOMEM); - rc = ll_prep_inode(sbi->ll_osc_exp, &inode, req, 0, sb); + 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) { - ptlrpc_req_finished(req); - return ERR_PTR(rc); + CERROR("can't get object attrs, fid "DFID", rc %d\n", + PFID(fid), rc); + RETURN(ERR_PTR(rc)); } + rc = ll_prep_inode(&inode, req, sb); ptlrpc_req_finished(req); + if (rc) + RETURN(ERR_PTR(rc)); - return inode; + 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, unsigned long ino, - __u32 generation, umode_t mode) -{ - struct inode *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; - struct list_head *lp; + ENTRY; - if (ino == 0) - return ERR_PTR(-ESTALE); + CDEBUG(D_INFO, "Get dentry for fid: "DFID"\n", PFID(fid)); + if (!fid_is_sane(fid)) + 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) - ){ + 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(" 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); + RETURN(ERR_PTR(-ESTALE)); } - - /* now to find a dentry. - * If possible, get a well-connected one + + /** + * It is an anonymous dentry without OST objects created yet. + * We have to find the parent to tell MDS how to init lov objects. */ - 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); - result->d_vfs_flags |= 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; + if (S_ISREG(inode->i_mode) && !ll_i2info(inode)->lli_has_smd && + parent != NULL) { + 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)) + RETURN(result); + + ll_dops_init(result, 1, 0); + + RETURN(result); } -struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len, - int fhtype, int parent) +#define LUSTRE_NFS_FID 0x97 + +/** + * \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. + */ +#ifndef HAVE_ENCODE_FH_PARENT +static int ll_encode_fh(struct dentry *de, __u32 *fh, int *plen, + int connectable) { - 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 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 + struct lustre_nfs_fid *nfs_fid = (void *)fh; + ENTRY; + + CDEBUG(D_INFO, "encoding for (%lu,"DFID") maxlen=%d minlen=%d\n", + inode->i_ino, PFID(ll_inode2fid(inode)), *plen, + (int)sizeof(struct lustre_nfs_fid)); + + if (*plen < sizeof(struct lustre_nfs_fid) / 4) + RETURN(255); + + nfs_fid->lnf_child = *ll_inode2fid(inode); + nfs_fid->lnf_parent = *ll_inode2fid(parent); + *plen = sizeof(struct lustre_nfs_fid) / 4; + + RETURN(LUSTRE_NFS_FID); } -int ll_dentry_to_fh(struct dentry *dentry, __u32 *datap, int *lenp, - int need_parent) +static int ll_nfs_get_name_filldir(void *cookie, const char *name, int namelen, + loff_t hash, u64 ino, unsigned type) { - 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; + /* 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; } - 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; + return lgd->lgd_found; +} + +static int ll_get_name(struct dentry *dentry, char *name, + struct dentry *child) +{ + struct inode *dir = dentry->d_inode; + struct ll_getname_data lgd; + __u64 offset = 0; + int rc; + ENTRY; + + if (!dir || !S_ISDIR(dir->i_mode)) + GOTO(out, rc = -ENOTDIR); + + 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; + + 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; +} + +#ifdef HAVE_FH_TO_DENTRY +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 != LUSTRE_NFS_FID) + 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 != LUSTRE_NFS_FID) + RETURN(ERR_PTR(-EPROTO)); + + RETURN(ll_iget_for_nfs(sb, &nfs_fid->lnf_parent, NULL)); +} + +#else + +/* + * This length is counted as amount of __u32, + * It is composed of a fid and a mode + */ +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) +{ + struct lustre_nfs_fid *nfs_fid = (void *)fh; + struct dentry *entry; + ENTRY; + + CDEBUG(D_INFO, "decoding for "DFID" fh_len=%d fh_type=%x\n", + PFID(&nfs_fid->lnf_child), fh_len, fh_type); + + if (fh_type != LUSTRE_NFS_FID) + RETURN(ERR_PTR(-EPROTO)); + + entry = sb->s_export_op->find_exported_dentry(sb, &nfs_fid->lnf_child, + &nfs_fid->lnf_parent, + acceptable, context); + RETURN(entry); +} + +static struct dentry *ll_get_dentry(struct super_block *sb, void *data) +{ + struct dentry *entry; + ENTRY; + + entry = ll_iget_for_nfs(sb, data, NULL); + RETURN(entry); +} +#endif +static struct dentry *ll_get_parent(struct dentry *dchild) +{ + struct ptlrpc_request *req = NULL; + struct inode *dir = dchild->d_inode; + struct ll_sb_info *sbi; + struct dentry *result = NULL; + struct mdt_body *body; + static char dotdot[] = ".."; + struct md_op_data *op_data; + int rc; + 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))); + + op_data = ll_prep_md_op_data(NULL, dir, NULL, dotdot, + strlen(dotdot), 0, + 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("failure %d inode %lu get parent\n", rc, dir->i_ino); + RETURN(ERR_PTR(rc)); } - *lenp = 3; - return 1; + body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); + LASSERT(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, + .encode_fh = ll_encode_fh, + .get_name = ll_get_name, +#ifdef HAVE_FH_TO_DENTRY + .fh_to_dentry = ll_fh_to_dentry, + .fh_to_parent = ll_fh_to_parent, +#else + .get_dentry = ll_get_dentry, + .decode_fh = ll_decode_fh, +#endif +};