+++ /dev/null
-/*
- * 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 COPYING file that accompanied this code.
-
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2013, 2014, Intel Corporation.
- */
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <lustre/lustre_idl.h>
-#include <lustre_fid.h>
-#include <obd_support.h>
-
-#include "mdd_internal.h"
-
-/*
- * To enable DNE functionality we need FID of /ROOT directory
- * (which is / as seen by the clients) to belong to MDT0 and
- * not to FID_SEQ_LOCAL_FILE or some other local sequence,
- * which can be used by any node, so can't be part of FLDB.
- *
- * Pre-production code was using FID_SEQ_LOCAL_FILE for /ROOT
- * making few existing setups incompatibile with DNE. This
- * applies to ZFS-based setups only as ldiskfs-based setups
- * are still using IGIF to identify /ROOT.
- *
- * The intention of this code is to fix on-disk state to use
- * FID_SEQ_ROOT for /ROOT:
- * - "." and ".." references in /ROOT itself and it`s subdirectories
- * - LinkEA in all the objects listed in /ROOT
- *
- * Given only ZFS is affected where "." and ".." are not stored, we need to:
- * - delete "." and ".." from /ROOT and its subdirectories
- * - rename references in LinkEA in all the objects listed in /ROOT
- *
- * This code is subject for removal in 2.5
- */
-static int mdd_convert_remove_dots(const struct lu_env *env,
- struct mdd_device *mdd,
- struct mdd_object *o)
-{
- struct thandle *th;
- const struct dt_key *dot = (const struct dt_key *)".";
- const struct dt_key *dotdot = (const struct dt_key *)"..";
- int rc;
-
- if (dt_try_as_dir(env, mdd_object_child(o)) == 0)
- RETURN(-ENOTDIR);
-
- /* remove "."/".." and do not insert them back - not stored in ZFS */
- th = dt_trans_create(env, mdd->mdd_child);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- rc = dt_declare_delete(env, mdd_object_child(o), dot, th);
- if (rc)
- GOTO(out, rc);
- rc = dt_declare_delete(env, mdd_object_child(o), dotdot, th);
- if (rc)
- GOTO(out, rc);
- rc = dt_trans_start_local(env, mdd->mdd_child, th);
- if (rc)
- GOTO(out, rc);
- /* ignore non-existing "."/".." - we stored them on disk for
- * pre-production systems, but this is not how regular ZFS works */
- rc = dt_delete(env, mdd_object_child(o), dot, th);
- if (rc == -ENOENT)
- rc = 0;
- if (rc)
- GOTO(out, rc);
- rc = dt_delete(env, mdd_object_child(o), dotdot, th);
- if (rc == -ENOENT)
- rc = 0;
- if (rc)
- GOTO(out, rc);
-
-out:
- dt_trans_stop(env, mdd->mdd_child, th);
- RETURN(rc);
-}
-
-static int mdd_convert_linkea(const struct lu_env *env,
- struct mdd_device *mdd,
- struct mdd_object *o,
- const struct lu_name *name)
-{
- struct thandle *th;
- struct lu_fid oldfid;
- int rc;
- ENTRY;
-
- th = dt_trans_create(env, mdd->mdd_child);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- rc = mdd_declare_links_add(env, o, th, NULL, MLAO_IGNORE);
- if (rc)
- GOTO(out, rc);
- rc = dt_trans_start_local(env, mdd->mdd_child, th);
- if (rc)
- GOTO(out, rc);
-
- oldfid.f_seq = FID_SEQ_LOCAL_FILE;
- oldfid.f_oid = MDD_ROOT_INDEX_OID;
- oldfid.f_ver = 0;
- rc = mdd_links_rename(env, o, &oldfid, name, &mdd->mdd_root_fid,
- name, th, NULL, 0, 1);
- if (rc == -ENOENT || rc == -EEXIST)
- rc = 0;
-
-out:
- dt_trans_stop(env, mdd->mdd_child, th);
- RETURN(rc);
-}
-
-static int mdd_convert_object(const struct lu_env *env,
- struct mdd_device *mdd,
- const struct lu_fid *fid,
- const struct lu_name *name)
-{
- struct mdd_object *o;
- struct lu_attr *la = MDD_ENV_VAR(env, cattr);
- int rc;
- ENTRY;
-
- o = mdd_object_find(env, mdd, fid);
- if (IS_ERR(o)) {
- CERROR("%s: can't access the object: rc = %d\n",
- mdd2obd_dev(mdd)->obd_name, (int)PTR_ERR(o));
- RETURN(PTR_ERR(o));
- }
-
- rc = mdo_attr_get(env, o, la);
- if (rc)
- GOTO(out, rc);
-
- if (S_ISDIR(la->la_mode)) {
- /* remove "." and ".." if a directory */
- rc = mdd_convert_remove_dots(env, mdd, o);
- if (rc)
- GOTO(out, rc);
- }
-
- /* update linkEA */
- rc = mdd_convert_linkea(env, mdd, o, name);
- if (rc)
- CERROR("%s: can't convert: rc = %d\n",
- mdd2obd_dev(mdd)->obd_name, rc);
-
-out:
- mdd_object_put(env, o);
- RETURN(0);
-}
-
-static int mdd_convert_lma(const struct lu_env *env, struct mdd_device *mdd,
- struct mdd_object *o)
-{
- struct lustre_mdt_attrs *lma;
- struct thandle *th;
- struct lu_fid fid;
- struct lu_buf buf;
- int rc;
- ENTRY;
-
- lu_root_fid(&fid);
-
- lma = (struct lustre_mdt_attrs *)&mdd_env_info(env)->mti_xattr_buf;
- lustre_lma_init(lma, &fid, 0, 0);
- lustre_lma_swab(lma);
- buf.lb_buf = lma;
- buf.lb_len = sizeof(*lma);
-
- th = dt_trans_create(env, mdd->mdd_child);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
- rc = mdo_declare_xattr_set(env, o, &buf, XATTR_NAME_LMA, 0, th);
- if (rc)
- GOTO(out, rc);
- rc = dt_trans_start_local(env, mdd->mdd_child, th);
- if (rc)
- GOTO(out, rc);
- rc = mdo_xattr_set(env, o, &buf, XATTR_NAME_LMA, 0, th);
-out:
- dt_trans_stop(env, mdd->mdd_child, th);
- RETURN(rc);
-}
-
-static int mdd_fix_children(const struct lu_env *env,
- struct mdd_device *mdd,
- struct dt_object *o)
-{
- struct mdd_thread_info *info = mdd_env_info(env);
- const struct dt_it_ops *iops;
- struct lu_name name;
- struct dt_it *it;
- struct lu_dirent *ent;
- int rc;
- ENTRY;
-
- /* scan /ROOT and update all ".." and linkEAs */
- ent = (struct lu_dirent *)&info->mti_xattr_buf;
- iops = &o->do_index_ops->dio_it;
-
- it = iops->init(env, o, LUDA_64BITHASH);
- if (IS_ERR(it)) {
- rc = PTR_ERR(it);
- CERROR("%s: can't initialize the iterator: rc = %d\n",
- mdd2obd_dev(mdd)->obd_name, rc);
- GOTO(out, rc);
- }
-
- rc = iops->load(env, it, 0);
- if (rc <= 0)
- GOTO(out_put, rc);
-
- do {
- size_t lu_dirent_size;
-
- rc = iops->key_size(env, it);
- if (rc == 0)
- goto next;
-
- /* calculate max space required for lu_dirent */
- lu_dirent_size = lu_dirent_calc_size(rc, 0);
- LASSERT(lu_dirent_size <= sizeof(info->mti_xattr_buf));
-
- rc = iops->rec(env, it, (struct dt_rec *)ent, LUDA_TYPE);
- if (rc == 0) {
- CDEBUG(D_OTHER, "convert %*s -> "DFID"\n",
- ent->lde_namelen, ent->lde_name,
- PFID(&ent->lde_fid));
- name.ln_namelen = ent->lde_namelen;
- name.ln_name = ent->lde_name;
- rc = mdd_convert_object(env, mdd, &ent->lde_fid, &name);
- if (rc) {
- CERROR("%s: can't convert "DFID": rc = %d\n",
- mdd2obd_dev(mdd)->obd_name,
- PFID(&ent->lde_fid), rc);
- break;
- }
- }
-
-next:
- rc = iops->next(env, it);
- } while (rc == 0);
- if (rc > 0)
- rc = 0;
-
-out_put:
- iops->put(env, it);
- iops->fini(env, it);
-out:
- RETURN(rc);
-}
-
-static int mdd_fill_fldb(const struct lu_env *env, struct mdd_device *mdd)
-{
- struct seq_server_site *ss = mdd_seq_site(mdd);
- struct lu_seq_range range;
- int rc;
-
- LASSERT(ss->ss_server_seq != NULL);
- LASSERT(ss->ss_server_fld != NULL);
-
- if (ss->ss_server_seq->lss_space.lsr_end == 0)
- return 0;
-
- memcpy(&range, &ss->ss_server_seq->lss_space, sizeof(range));
-
- /* Pre-existing ZFS does not insert any entries to FLDB, we need
- * to insert it to FLDB during convertion */
- range.lsr_start = FID_SEQ_NORMAL;
- fld_range_set_mdt(&range);
-
- mutex_lock(&ss->ss_server_fld->lsf_lock);
- rc = fld_insert_entry(env, ss->ss_server_fld, &range);
- mutex_unlock(&ss->ss_server_fld->lsf_lock);
-
- LCONSOLE_INFO("%s: insert missing range "DRANGE"\n",
- mdd2obd_dev(mdd)->obd_name, PRANGE(&range));
- return rc;
-}
-int mdd_compat_fixes(const struct lu_env *env, struct mdd_device *mdd)
-{
- struct mdd_thread_info *info = mdd_env_info(env);
- struct mdd_object *root;
- struct dt_object *o;
- struct lustre_mdt_attrs *lma;
- struct lu_buf buf;
- int rc;
- ENTRY;
-
- /* IGIF FIDS are valid for old 1.8 and 2.[123] ROOT and are kept.
- * Normal FIDs used by Xyratex 1.8->2.1 upgrade tool are also kept. */
- if (fid_is_igif(&mdd->mdd_root_fid) || fid_is_norm(&mdd->mdd_root_fid))
- RETURN(0);
-
- /*
- * FID is supposed to be FID_SEQ_ROOT for:
- * - new ldiskfs fs
- * - new ZFS fs
- * - old ZFS fs, by now processed with osd_convert_root_to_new_seq()
- */
- if (fid_seq(&mdd->mdd_root_fid) != FID_SEQ_ROOT) {
- CERROR("%s: wrong FID "DFID" is used for /ROOT\n",
- mdd2obd_dev(mdd)->obd_name,
- PFID(&mdd->mdd_root_fid));
- RETURN(-EINVAL);
- }
-
- root = mdd_object_find(env, mdd, &mdd->mdd_root_fid);
- if (IS_ERR(root))
- RETURN(PTR_ERR(root));
- o = mdd_object_child(root);
-
- CDEBUG(D_OTHER, "/ROOT = "DFID"\n", PFID(&mdd->mdd_root_fid));
-
- if (dt_try_as_dir(env, o) == 0) {
- CERROR("%s: not a directory\n", mdd2obd_dev(mdd)->obd_name);
- GOTO(out, rc = -ENOTDIR);
- }
-
- lma = (struct lustre_mdt_attrs *)&info->mti_xattr_buf;
- CLASSERT(sizeof(info->mti_xattr_buf) >= LMA_OLD_SIZE);
- buf.lb_len = LMA_OLD_SIZE;
- buf.lb_buf = lma;
- rc = mdo_xattr_get(env, root, &buf, XATTR_NAME_LMA);
- if (rc < 0 && rc != -ENODATA) {
- CERROR("%s: can't fetch LMA: rc = %d\n",
- mdd2obd_dev(mdd)->obd_name, rc);
- GOTO(out, rc);
- }
-
- lustre_lma_swab(lma);
- if (lu_fid_eq(&lma->lma_self_fid, &mdd->mdd_root_fid)) {
- /* /ROOT has been converted already
- * or was correct from the beginning */
- CDEBUG(D_OTHER, "%s: converted already\n",
- mdd2obd_dev(mdd)->obd_name);
- GOTO(out, rc = 0);
- }
-
- /* this is supposed to happen only on pre-production ZFS backend */
- if (strcmp(mdd->mdd_bottom->dd_lu_dev.ld_type->ldt_name,
- LUSTRE_OSD_ZFS_NAME) != 0) {
- CERROR("%s: "DFID" is used on ldiskfs?!\n",
- mdd2obd_dev(mdd)->obd_name, PFID(&mdd->mdd_root_fid));
- GOTO(out, rc = -ENOTSUPP);
- }
-
- LCONSOLE_INFO("%s: FID of /ROOT has been changed. "
- "Please remount the clients.\n",
- mdd2obd_dev(mdd)->obd_name);
-
- /* Fill FLDB first */
- rc = mdd_fill_fldb(env, mdd);
- if (rc)
- GOTO(out, rc);
-
- /* remove ./.. from /ROOT */
- rc = mdd_convert_remove_dots(env, mdd, root);
- if (rc)
- GOTO(out, rc);
-
- /* go over the directory, fix all the objects */
- rc = mdd_fix_children(env, mdd, o);
- if (rc)
- GOTO(out, rc);
-
- /* Update LMA on /ROOT. Done for simplicity in MDD, not in osd-zfs.
- * Correct LMA will imply the whole directory has been coverted
- * successfully, otherwise it will be retried on next mount. */
- rc = mdd_convert_lma(env, mdd, root);
-
-out:
- mdd_object_put(env, root);
- RETURN(rc);
-}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff