X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fllite%2Fllite_nfs.c;h=4907d68c77f2ec5d7c9c37e7446635f9f776c51f;hp=a2ce9593fc489ce53f0f3dc852ee011fb76c59d9;hb=da63a46c51e86953dc62db76b8fa4d1a0f1aef4d;hpb=95dbd166988cf0a2912c51305572c78a9aa2d324 diff --git a/lustre/llite/llite_nfs.c b/lustre/llite/llite_nfs.c index a2ce959..4907d68 100644 --- a/lustre/llite/llite_nfs.c +++ b/lustre/llite/llite_nfs.c @@ -1,6 +1,4 @@ -/* -*- 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. @@ -17,17 +15,15 @@ * * 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 - * - * 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. + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved + * 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/ @@ -42,110 +38,135 @@ */ #define DEBUG_SUBSYSTEM S_LLITE -#include #include "llite_internal.h" -#ifdef HAVE_LINUX_EXPORTFS_H #include -#endif -__u32 get_uuid2int(const char *name, int len) +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); -} + u32 key0 = 0x12a3fe2d, key1 = 0x37abe8f9; -static int ll_nfs_test_inode(struct inode *inode, void *opaque) -{ - return lu_fid_eq(&ll_i2info(inode)->lli_fid, - (struct lu_fid *)opaque); + while (len--) { + u32 key = key1 + (key0 ^ (*name++ * 7152373)); + + if (key & 0x80000000) + key -= 0x7fffffff; + + key1 = key0; + key0 = key; + } + return (key0 << 1); } -static struct inode *search_inode_for_lustre(struct super_block *sb, - const struct lu_fid *fid) +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 = cl_fid_build_ino(fid); - int rc; - ENTRY; - - CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", ino, PFID(fid)); - - inode = ILOOKUP(sb, ino, ll_nfs_test_inode, fid); - if (inode) - RETURN(inode); - - rc = ll_get_max_mdsize(sbi, &eadatalen); - if (rc) - RETURN(ERR_PTR(rc)); - - valid |= OBD_MD_FLEASIZE; - - /* mds_fid2dentry ignores f_type */ - rc = md_getattr(sbi->ll_md_exp, fid, NULL, valid, eadatalen, &req); - if (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); + 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, - const struct lu_fid *fid) +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)); - - 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_obtain_alias(inode); - if (!result) { - iput(inode); - RETURN(ERR_PTR(-ENOMEM)); - } - - ll_dops_init(result, 1); - - RETURN(result); + 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); } -#define LUSTRE_NFS_FID 0x97 - -struct lustre_nfs_fid { - struct lu_fid lnf_child; - struct lu_fid lnf_parent; -}; +#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 @@ -156,134 +177,203 @@ struct lustre_nfs_fid { * 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 int ll_encode_fh(struct inode *inode, u32 *fh, int *plen, + struct inode *parent) { - struct inode *inode = de->d_inode; - struct inode *parent = de->d_parent->d_inode; - struct lustre_nfs_fid *nfs_fid = (void *)fh; - ENTRY; + int fileid_len = sizeof(struct lustre_file_handle) / 4; + struct lustre_file_handle *lfh = (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)); + 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 < sizeof(struct lustre_nfs_fid)/4) - RETURN(255); + if (*plen < fileid_len) { + *plen = fileid_len; + RETURN(FILEID_INVALID); + } - nfs_fid->lnf_child = *ll_inode2fid(inode); - nfs_fid->lnf_parent = *ll_inode2fid(parent); - *plen = sizeof(struct lustre_nfs_fid)/4; + lfh->lfh_child = *ll_inode2fid(inode); + if (parent) + lfh->lfh_parent = *ll_inode2fid(parent); + else + fid_zero(&lfh->lfh_parent); + *plen = fileid_len; - RETURN(LUSTRE_NFS_FID); + RETURN(FILEID_LUSTRE); } -#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) +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) { - 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)); + 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 dentry *ll_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) +static int ll_get_name(struct dentry *dentry, char *name, + struct dentry *child) { - struct lustre_nfs_fid *nfs_fid = (struct lustre_nfs_fid *)fid; + 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; - if (fh_type != LUSTRE_NFS_FID) - RETURN(ERR_PTR(-EPROTO)); + ENTRY; - RETURN(ll_iget_for_nfs(sb, &nfs_fid->lnf_parent)); -} + 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; +} -/* - * 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) +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 = (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); + struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid; - if (fh_type != LUSTRE_NFS_FID) - RETURN(ERR_PTR(-EPROTO)); + if (fh_type != FILEID_LUSTRE) + 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); + RETURN(ll_iget_for_nfs(sb, &lfh->lfh_child, &lfh->lfh_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 lustre_nfs_fid *fid = data; - struct dentry *entry; - ENTRY; + struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid; + + if (fh_type != FILEID_LUSTRE) + RETURN(ERR_PTR(-EPROTO)); - entry = ll_iget_for_nfs(sb, &fid->lnf_child); - RETURN(entry); + RETURN(ll_iget_for_nfs(sb, &lfh->lfh_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; + + 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); } -#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[] = ".."; - 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))); - - 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 = 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); - - ptlrpc_req_finished(req); - RETURN(result); + 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, -#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 + .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, };