+/*
+ * 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.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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * Copyright (c) 2011, 2012 Whamcloud, Inc.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/osd-zfs/osd_index.c
+ *
+ * Author: Alex Zhuravlev <bzzz@whamcloud.com>
+ * Author: Mike Pershin <tappro@whamcloud.com>
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_OSD
+
+#include <lustre_ver.h>
+#include <libcfs/libcfs.h>
+#include <lustre_fsfilt.h>
+#include <obd_support.h>
+#include <lustre_net.h>
+#include <obd.h>
+#include <obd_class.h>
+#include <lustre_disk.h>
+#include <lustre_fid.h>
+
+#include "osd_internal.h"
+
+#include <sys/dnode.h>
+#include <sys/dbuf.h>
+#include <sys/spa.h>
+#include <sys/stat.h>
+#include <sys/zap.h>
+#include <sys/spa_impl.h>
+#include <sys/zfs_znode.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_prop.h>
+#include <sys/sa_impl.h>
+#include <sys/txg.h>
+
+static struct dt_it *osd_zap_it_init(const struct lu_env *env,
+ struct dt_object *dt,
+ __u32 unused,
+ struct lustre_capa *capa)
+{
+ struct osd_thread_info *info = osd_oti_get(env);
+ struct osd_zap_it *it;
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ struct lu_object *lo = &dt->do_lu;
+ ENTRY;
+
+ /* XXX: check capa ? */
+
+ LASSERT(lu_object_exists(lo));
+ LASSERT(obj->oo_db);
+ LASSERT(udmu_object_is_zap(obj->oo_db));
+ LASSERT(info);
+
+ it = &info->oti_it_zap;
+
+ if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
+ obj->oo_db->db_object, 0))
+ RETURN(ERR_PTR(-ENOMEM));
+
+ it->ozi_obj = obj;
+ it->ozi_capa = capa;
+ it->ozi_reset = 1;
+ lu_object_get(lo);
+
+ RETURN((struct dt_it *)it);
+}
+
+static void osd_zap_it_fini(const struct lu_env *env, struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj;
+ ENTRY;
+
+ LASSERT(it);
+ LASSERT(it->ozi_obj);
+
+ obj = it->ozi_obj;
+
+ udmu_zap_cursor_fini(it->ozi_zc);
+ lu_object_put(env, &obj->oo_dt.do_lu);
+
+ EXIT;
+}
+
+/**
+ * Move Iterator to record specified by \a key
+ *
+ * \param di osd iterator
+ * \param key key for index
+ *
+ * \retval +ve di points to record with least key not larger than key
+ * \retval 0 di points to exact matched key
+ * \retval -ve failure
+ */
+
+static int osd_zap_it_get(const struct lu_env *env,
+ struct dt_it *di, const struct dt_key *key)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj = it->ozi_obj;
+ struct osd_device *osd = osd_obj2dev(obj);
+ ENTRY;
+
+ LASSERT(it);
+ LASSERT(it->ozi_zc);
+
+ /* XXX: API is broken at the moment */
+ LASSERT(((const char *)key)[0] == '\0');
+
+ udmu_zap_cursor_fini(it->ozi_zc);
+ if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
+ obj->oo_db->db_object, 0))
+ RETURN(-ENOMEM);
+
+ it->ozi_reset = 1;
+
+ RETURN(+1);
+}
+
+static void osd_zap_it_put(const struct lu_env *env, struct dt_it *di)
+{
+ /* PBS: do nothing : ref are incremented at retrive and decreamented
+ * next/finish. */
+}
+
+int udmu_zap_cursor_retrieve_key(const struct lu_env *env,
+ zap_cursor_t *zc, char *key, int max)
+{
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ int err;
+
+ if ((err = zap_cursor_retrieve(zc, za)))
+ return err;
+
+ if (key) {
+ if (strlen(za->za_name) > max)
+ return EOVERFLOW;
+ strcpy(key, za->za_name);
+ }
+
+ return 0;
+}
+
+/**
+ * to load a directory entry at a time and stored it in
+ * iterator's in-memory data structure.
+ *
+ * \param di, struct osd_it_ea, iterator's in memory structure
+ *
+ * \retval +ve, iterator reached to end
+ * \retval 0, iterator not reached to end
+ * \retval -ve, on error
+ */
+static int osd_zap_it_next(const struct lu_env *env, struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ int rc;
+ ENTRY;
+
+ if (it->ozi_reset == 0)
+ zap_cursor_advance(it->ozi_zc);
+ it->ozi_reset = 0;
+
+ /*
+ * According to current API we need to return error if its last entry.
+ * zap_cursor_advance() does return any value. So we need to call
+ * retrieve to check if there is any record. We should make
+ * changes to Iterator API to not return status for this API
+ */
+ rc = -udmu_zap_cursor_retrieve_key(env, it->ozi_zc, NULL, NAME_MAX);
+ if (rc == -ENOENT) /* end of dir*/
+ RETURN(+1);
+
+ RETURN((rc));
+}
+
+static struct dt_key *osd_zap_it_key(const struct lu_env *env,
+ const struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ int rc = 0;
+ ENTRY;
+
+ it->ozi_reset = 0;
+ rc = -udmu_zap_cursor_retrieve_key(env, it->ozi_zc, it->ozi_name,
+ NAME_MAX + 1);
+ if (!rc)
+ RETURN((struct dt_key *)it->ozi_name);
+ else
+ RETURN(ERR_PTR(rc));
+}
+
+static int osd_zap_it_key_size(const struct lu_env *env, const struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ int rc;
+ ENTRY;
+
+ it->ozi_reset = 0;
+ rc = -udmu_zap_cursor_retrieve_key(env, it->ozi_zc, it->ozi_name,
+ NAME_MAX + 1);
+ if (!rc)
+ RETURN(strlen(it->ozi_name));
+ else
+ RETURN(rc);
+}
+
+/*
+ * zap_cursor_retrieve read from current record.
+ * to read bytes we need to call zap_lookup explicitly.
+ */
+int udmu_zap_cursor_retrieve_value(const struct lu_env *env,
+ zap_cursor_t *zc, char *buf,
+ int buf_size, int *bytes_read)
+{
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ int err, actual_size;
+
+
+ if ((err = zap_cursor_retrieve(zc, za)))
+ return err;
+
+ if (za->za_integer_length <= 0)
+ return (ERANGE);
+
+ actual_size = za->za_integer_length * za->za_num_integers;
+
+ if (actual_size > buf_size) {
+ actual_size = buf_size;
+ buf_size = actual_size / za->za_integer_length;
+ } else {
+ buf_size = za->za_num_integers;
+ }
+
+ err = -zap_lookup(zc->zc_objset, zc->zc_zapobj,
+ za->za_name, za->za_integer_length,
+ buf_size, buf);
+
+ if (!err)
+ *bytes_read = actual_size;
+
+ return err;
+}
+
+static inline void osd_it_append_attrs(struct lu_dirent *ent, __u32 attr,
+ int len, __u16 type)
+{
+ const unsigned align = sizeof(struct luda_type) - 1;
+ struct luda_type *lt;
+
+ /* check if file type is required */
+ if (attr & LUDA_TYPE) {
+ len = (len + align) & ~align;
+
+ lt = (void *)ent->lde_name + len;
+ lt->lt_type = cpu_to_le16(CFS_DTTOIF(type));
+ ent->lde_attrs |= LUDA_TYPE;
+ }
+
+ ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
+}
+
+static int osd_zap_it_rec(const struct lu_env *env, const struct dt_it *di,
+ struct dt_rec *dtrec, __u32 attr)
+{
+ struct luz_direntry *zde = &osd_oti_get(env)->oti_zde;
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct lu_dirent *lde = (struct lu_dirent *)dtrec;
+ int rc, namelen;
+ ENTRY;
+
+ it->ozi_reset = 0;
+ LASSERT(lde);
+
+ lde->lde_hash = cpu_to_le64(udmu_zap_cursor_serialize(it->ozi_zc));
+
+ if ((rc = -zap_cursor_retrieve(it->ozi_zc, za)))
+ GOTO(out, rc);
+
+ namelen = strlen(za->za_name);
+ if (namelen > NAME_MAX)
+ GOTO(out, rc = -EOVERFLOW);
+ strcpy(lde->lde_name, za->za_name);
+ lde->lde_namelen = cpu_to_le16(namelen);
+
+ if (za->za_integer_length != 8 || za->za_num_integers < 3) {
+ CERROR("%s: unsupported direntry format: %d %d\n",
+ osd_obj2dev(it->ozi_obj)->od_svname,
+ za->za_integer_length, (int)za->za_num_integers);
+
+ GOTO(out, rc = -EIO);
+ }
+
+ rc = -zap_lookup(it->ozi_zc->zc_objset, it->ozi_zc->zc_zapobj,
+ za->za_name, za->za_integer_length, 3, zde);
+ if (rc)
+ GOTO(out, rc);
+
+ lde->lde_fid = zde->lzd_fid;
+ lde->lde_attrs = LUDA_FID;
+
+ /* append lustre attributes */
+ osd_it_append_attrs(lde, attr, namelen, zde->lzd_reg.zde_type);
+
+ lde->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
+
+out:
+ RETURN(rc);
+}
+
+static __u64 osd_zap_it_store(const struct lu_env *env, const struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+
+ it->ozi_reset = 0;
+ RETURN(udmu_zap_cursor_serialize(it->ozi_zc));
+}
+
+/*
+ * return status :
+ * rc == 0 -> ok, proceed.
+ * rc > 0 -> end of directory.
+ * rc < 0 -> error. ( EOVERFLOW can be masked.)
+ */
+static int osd_zap_it_load(const struct lu_env *env,
+ const struct dt_it *di, __u64 hash)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj = it->ozi_obj;
+ struct osd_device *osd = osd_obj2dev(obj);
+ int rc;
+ ENTRY;
+
+ udmu_zap_cursor_fini(it->ozi_zc);
+ if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
+ obj->oo_db->db_object, hash))
+ RETURN(-ENOMEM);
+ it->ozi_reset = 0;
+
+ /* same as osd_zap_it_next()*/
+ rc = -udmu_zap_cursor_retrieve_key(env, it->ozi_zc, NULL,
+ NAME_MAX + 1);
+ if (rc == 0)
+ RETURN(+1);
+ else if (rc == -ENOENT) /* end of dir*/
+ RETURN(0);
+
+ RETURN(rc);
+}
+
+static int osd_dir_lookup(const struct lu_env *env, struct dt_object *dt,
+ struct dt_rec *rec, const struct dt_key *key,
+ struct lustre_capa *capa)
+{
+ struct osd_thread_info *oti = osd_oti_get(env);
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ int rc;
+ ENTRY;
+
+ LASSERT(udmu_object_is_zap(obj->oo_db));
+
+ rc = -zap_lookup(osd->od_objset.os, obj->oo_db->db_object,
+ (char *)key, 8, sizeof(oti->oti_zde) / 8,
+ (void *)&oti->oti_zde);
+ memcpy(rec, &oti->oti_zde.lzd_fid, sizeof(struct lu_fid));
+
+ RETURN(rc == 0 ? 1 : rc);
+}
+
+static int osd_declare_dir_insert(const struct lu_env *env,
+ struct dt_object *dt,
+ const struct dt_rec *rec,
+ const struct dt_key *key,
+ struct thandle *th)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_thandle *oh;
+ ENTRY;
+
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ LASSERT(obj->oo_db);
+ LASSERT(udmu_object_is_zap(obj->oo_db));
+
+ dmu_tx_hold_bonus(oh->ot_tx, obj->oo_db->db_object);
+ dmu_tx_hold_zap(oh->ot_tx, obj->oo_db->db_object, TRUE, (char *)key);
+
+ RETURN(0);
+}
+
+/**
+ * Find the osd object for given fid.
+ *
+ * \param fid need to find the osd object having this fid
+ *
+ * \retval osd_object on success
+ * \retval -ve on error
+ */
+struct osd_object *osd_object_find(const struct lu_env *env,
+ struct dt_object *dt,
+ const struct lu_fid *fid)
+{
+ struct lu_device *ludev = dt->do_lu.lo_dev;
+ struct osd_object *child = NULL;
+ struct lu_object *luch;
+ struct lu_object *lo;
+
+ /*
+ * at this point topdev might not exist yet
+ * (i.e. MGS is preparing profiles). so we can
+ * not rely on topdev and instead lookup with
+ * our device passed as topdev. this can't work
+ * if the object isn't cached yet (as osd doesn't
+ * allocate lu_header). IOW, the object must be
+ * in the cache, otherwise lu_object_alloc() crashes
+ * -bzzz
+ */
+ luch = lu_object_find_at(env, ludev, fid, NULL);
+ if (IS_ERR(luch))
+ return (void *)luch;
+
+ if (lu_object_exists(luch)) {
+ lo = lu_object_locate(luch->lo_header, ludev->ld_type);
+ if (lo != NULL)
+ child = osd_obj(lo);
+ else
+ LU_OBJECT_DEBUG(D_ERROR, env, luch,
+ "%s: object can't be located "DFID"\n",
+ ludev->ld_obd->obd_name, PFID(fid));
+
+ if (child == NULL) {
+ lu_object_put(env, luch);
+ CERROR("%s: Unable to get osd_object "DFID"\n",
+ ludev->ld_obd->obd_name, PFID(fid));
+ child = ERR_PTR(-ENOENT);
+ }
+ } else {
+ LU_OBJECT_DEBUG(D_ERROR, env, luch,
+ "%s: lu_object does not exists "DFID"\n",
+ ludev->ld_obd->obd_name, PFID(fid));
+ lu_object_put(env, luch);
+ child = ERR_PTR(-ENOENT);
+ }
+
+ return child;
+}
+
+/**
+ * Put the osd object once done with it.
+ *
+ * \param obj osd object that needs to be put
+ */
+static inline void osd_object_put(const struct lu_env *env,
+ struct osd_object *obj)
+{
+ lu_object_put(env, &obj->oo_dt.do_lu);
+}
+
+/**
+ * Inserts (key, value) pair in \a directory object.
+ *
+ * \param dt osd index object
+ * \param key key for index
+ * \param rec record reference
+ * \param th transaction handler
+ * \param capa capability descriptor
+ * \param ignore_quota update should not affect quota
+ *
+ * \retval 0 success
+ * \retval -ve failure
+ */
+static int osd_dir_insert(const struct lu_env *env, struct dt_object *dt,
+ const struct dt_rec *rec, const struct dt_key *key,
+ struct thandle *th, struct lustre_capa *capa,
+ int ignore_quota)
+{
+ struct osd_thread_info *oti = osd_oti_get(env);
+ struct osd_object *parent = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(parent);
+ struct lu_fid *fid = (struct lu_fid *)rec;
+ struct osd_thandle *oh;
+ struct osd_object *child;
+ __u32 attr;
+ int rc;
+ ENTRY;
+
+ LASSERT(parent->oo_db);
+ LASSERT(udmu_object_is_zap(parent->oo_db));
+
+ LASSERT(dt_object_exists(dt));
+ LASSERT(osd_invariant(parent));
+
+ /*
+ * zfs_readdir() generates ./.. on fly, but
+ * we want own entries (.. at least) with a fid
+ */
+#if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 3, 53, 0)
+#warning "fix '.' and '..' handling"
+#endif
+
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ child = osd_object_find(env, dt, fid);
+ if (IS_ERR(child))
+ RETURN(PTR_ERR(child));
+
+ LASSERT(child->oo_db);
+
+ CLASSERT(sizeof(oti->oti_zde.lzd_reg) == 8);
+ CLASSERT(sizeof(oti->oti_zde) % 8 == 0);
+ attr = child->oo_dt.do_lu.lo_header ->loh_attr;
+ oti->oti_zde.lzd_reg.zde_type = IFTODT(attr & S_IFMT);
+ oti->oti_zde.lzd_reg.zde_dnode = child->oo_db->db_object;
+ oti->oti_zde.lzd_fid = *fid;
+
+ /* Insert (key,oid) into ZAP */
+ rc = -zap_add(osd->od_objset.os, parent->oo_db->db_object,
+ (char *)key, 8, sizeof(oti->oti_zde) / 8,
+ (void *)&oti->oti_zde, oh->ot_tx);
+
+ osd_object_put(env, child);
+
+ RETURN(rc);
+}
+
+static int osd_declare_dir_delete(const struct lu_env *env,
+ struct dt_object *dt,
+ const struct dt_key *key,
+ struct thandle *th)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_thandle *oh;
+ ENTRY;
+
+ LASSERT(dt_object_exists(dt));
+ LASSERT(osd_invariant(obj));
+
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ LASSERT(obj->oo_db);
+ LASSERT(udmu_object_is_zap(obj->oo_db));
+
+ dmu_tx_hold_zap(oh->ot_tx, obj->oo_db->db_object, TRUE, (char *)key);
+
+ RETURN(0);
+}
+
+static int osd_dir_delete(const struct lu_env *env, struct dt_object *dt,
+ const struct dt_key *key, struct thandle *th,
+ struct lustre_capa *capa)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ struct osd_thandle *oh;
+ dmu_buf_t *zap_db = obj->oo_db;
+ int rc;
+ ENTRY;
+
+ LASSERT(obj->oo_db);
+ LASSERT(udmu_object_is_zap(obj->oo_db));
+
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ /* Remove key from the ZAP */
+ rc = -zap_remove(osd->od_objset.os, zap_db->db_object,
+ (char *) key, oh->ot_tx);
+
+ if (rc && rc != -ENOENT)
+ CERROR("%s: zap_remove failed: rc = %d\n", osd->od_svname, rc);
+
+ RETURN(rc);
+}
+
+static struct dt_index_operations osd_dir_ops = {
+ .dio_lookup = osd_dir_lookup,
+ .dio_declare_insert = osd_declare_dir_insert,
+ .dio_insert = osd_dir_insert,
+ .dio_declare_delete = osd_declare_dir_delete,
+ .dio_delete = osd_dir_delete,
+ .dio_it = {
+ .init = osd_zap_it_init,
+ .fini = osd_zap_it_fini,
+ .get = osd_zap_it_get,
+ .put = osd_zap_it_put,
+ .next = osd_zap_it_next,
+ .key = osd_zap_it_key,
+ .key_size = osd_zap_it_key_size,
+ .rec = osd_zap_it_rec,
+ .store = osd_zap_it_store,
+ .load = osd_zap_it_load
+ }
+};
+
+/*
+ * Primitives for index files using binary keys.
+ * XXX: only 64-bit keys are supported for now.
+ */
+
+static int osd_index_lookup(const struct lu_env *env, struct dt_object *dt,
+ struct dt_rec *rec, const struct dt_key *key,
+ struct lustre_capa *capa)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ int rc;
+ ENTRY;
+
+ rc = -zap_lookup_uint64(osd->od_objset.os, obj->oo_db->db_object,
+ (const __u64 *)key, 1, 8, obj->oo_recsize,
+ (void *)rec);
+ RETURN(rc == 0 ? 1 : rc);
+}
+
+static int osd_declare_index_insert(const struct lu_env *env,
+ struct dt_object *dt,
+ const struct dt_rec *rec,
+ const struct dt_key *key,
+ struct thandle *th)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_thandle *oh;
+ ENTRY;
+
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ LASSERT(obj->oo_db);
+
+ dmu_tx_hold_bonus(oh->ot_tx, obj->oo_db->db_object);
+
+ /* It is not clear what API should be used for binary keys, so we pass
+ * a null name which has the side effect of over-reserving space,
+ * accounting for the worst case. See zap_count_write() */
+ dmu_tx_hold_zap(oh->ot_tx, obj->oo_db->db_object, TRUE, NULL);
+
+ RETURN(0);
+}
+
+static int osd_index_insert(const struct lu_env *env, struct dt_object *dt,
+ const struct dt_rec *rec, const struct dt_key *key,
+ struct thandle *th, struct lustre_capa *capa,
+ int ignore_quota)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ struct osd_thandle *oh;
+ int rc;
+ ENTRY;
+
+ LASSERT(obj->oo_db);
+ LASSERT(dt_object_exists(dt));
+ LASSERT(osd_invariant(obj));
+ LASSERT(th != NULL);
+
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ /* Insert (key,oid) into ZAP */
+ rc = -zap_add_uint64(osd->od_objset.os, obj->oo_db->db_object,
+ (const __u64 *)key, 1, 8, obj->oo_recsize,
+ (void *)rec, oh->ot_tx);
+ RETURN(rc);
+}
+
+static int osd_declare_index_delete(const struct lu_env *env,
+ struct dt_object *dt,
+ const struct dt_key *key,
+ struct thandle *th)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_thandle *oh;
+ ENTRY;
+
+ LASSERT(dt_object_exists(dt));
+ LASSERT(osd_invariant(obj));
+ LASSERT(th != NULL);
+ LASSERT(obj->oo_db);
+
+ oh = container_of0(th, struct osd_thandle, ot_super);
+ dmu_tx_hold_zap(oh->ot_tx, obj->oo_db->db_object, TRUE, NULL);
+
+ RETURN(0);
+}
+
+static int osd_index_delete(const struct lu_env *env, struct dt_object *dt,
+ const struct dt_key *key, struct thandle *th,
+ struct lustre_capa *capa)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
+ struct osd_thandle *oh;
+ int rc;
+ ENTRY;
+
+ LASSERT(obj->oo_db);
+ LASSERT(th != NULL);
+ oh = container_of0(th, struct osd_thandle, ot_super);
+
+ /* Remove binary key from the ZAP */
+ rc = -zap_remove_uint64(osd->od_objset.os, obj->oo_db->db_object,
+ (const __u64 *)key, 1, oh->ot_tx);
+ RETURN(rc);
+}
+
+static int osd_index_it_get(const struct lu_env *env, struct dt_it *di,
+ const struct dt_key *key)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj = it->ozi_obj;
+ struct osd_device *osd = osd_obj2dev(obj);
+ ENTRY;
+
+ LASSERT(it);
+ LASSERT(it->ozi_zc);
+
+ /* XXX: API is broken at the moment */
+ LASSERT(*((const __u64 *)key) == 0);
+
+ zap_cursor_fini(it->ozi_zc);
+ memset(it->ozi_zc, 0, sizeof(*it->ozi_zc));
+ zap_cursor_init(it->ozi_zc, osd->od_objset.os, obj->oo_db->db_object);
+ it->ozi_reset = 1;
+
+ RETURN(+1);
+}
+
+static int osd_index_it_next(const struct lu_env *env, struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ int rc;
+ ENTRY;
+
+ if (it->ozi_reset == 0)
+ zap_cursor_advance(it->ozi_zc);
+ it->ozi_reset = 0;
+
+ /*
+ * According to current API we need to return error if it's last entry.
+ * zap_cursor_advance() does not return any value. So we need to call
+ * retrieve to check if there is any record. We should make
+ * changes to Iterator API to not return status for this API
+ */
+ rc = -zap_cursor_retrieve(it->ozi_zc, za);
+ if (rc == -ENOENT)
+ RETURN(+1);
+
+ RETURN((rc));
+}
+
+static struct dt_key *osd_index_it_key(const struct lu_env *env,
+ const struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ int rc = 0;
+ ENTRY;
+
+ it->ozi_reset = 0;
+ rc = -zap_cursor_retrieve(it->ozi_zc, za);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ /* the binary key is stored in the name */
+ it->ozi_key = *((__u64 *)za->za_name);
+
+ RETURN((struct dt_key *)&it->ozi_key);
+}
+
+static int osd_index_it_key_size(const struct lu_env *env,
+ const struct dt_it *di)
+{
+ /* we only support 64-bit binary keys for the time being */
+ RETURN(sizeof(__u64));
+}
+
+static int osd_index_it_rec(const struct lu_env *env, const struct dt_it *di,
+ struct dt_rec *rec, __u32 attr)
+{
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj = it->ozi_obj;
+ struct osd_device *osd = osd_obj2dev(obj);
+ int rc;
+ ENTRY;
+
+ it->ozi_reset = 0;
+ rc = -zap_cursor_retrieve(it->ozi_zc, za);
+ if (rc)
+ RETURN(rc);
+
+ rc = -zap_lookup_uint64(osd->od_objset.os, obj->oo_db->db_object,
+ (const __u64 *)za->za_name, 1, 8,
+ obj->oo_recsize, (void *)rec);
+ RETURN(rc);
+}
+
+static __u64 osd_index_it_store(const struct lu_env *env,
+ const struct dt_it *di)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+
+ it->ozi_reset = 0;
+ RETURN((__u64)zap_cursor_serialize(it->ozi_zc));
+}
+
+static int osd_index_it_load(const struct lu_env *env, const struct dt_it *di,
+ __u64 hash)
+{
+ struct osd_zap_it *it = (struct osd_zap_it *)di;
+ struct osd_object *obj = it->ozi_obj;
+ struct osd_device *osd = osd_obj2dev(obj);
+ zap_attribute_t *za = &osd_oti_get(env)->oti_za;
+ int rc;
+ ENTRY;
+
+ /* close the current cursor */
+ zap_cursor_fini(it->ozi_zc);
+
+ /* create a new one starting at hash */
+ memset(it->ozi_zc, 0, sizeof(*it->ozi_zc));
+ zap_cursor_init_serialized(it->ozi_zc, osd->od_objset.os,
+ obj->oo_db->db_object, hash);
+ it->ozi_reset = 0;
+
+ rc = -zap_cursor_retrieve(it->ozi_zc, za);
+ if (rc == 0)
+ RETURN(+1);
+ else if (rc == -ENOENT)
+ RETURN(0);
+
+ RETURN(rc);
+}
+
+static struct dt_index_operations osd_index_ops = {
+ .dio_lookup = osd_index_lookup,
+ .dio_declare_insert = osd_declare_index_insert,
+ .dio_insert = osd_index_insert,
+ .dio_declare_delete = osd_declare_index_delete,
+ .dio_delete = osd_index_delete,
+ .dio_it = {
+ .init = osd_zap_it_init,
+ .fini = osd_zap_it_fini,
+ .get = osd_index_it_get,
+ .put = osd_zap_it_put,
+ .next = osd_index_it_next,
+ .key = osd_index_it_key,
+ .key_size = osd_index_it_key_size,
+ .rec = osd_index_it_rec,
+ .store = osd_index_it_store,
+ .load = osd_index_it_load
+ }
+};
+
+int osd_index_try(const struct lu_env *env, struct dt_object *dt,
+ const struct dt_index_features *feat)
+{
+ struct osd_object *obj = osd_dt_obj(dt);
+ ENTRY;
+
+ LASSERT(obj->oo_db != NULL);
+
+ /*
+ * XXX: implement support for fixed-size keys sorted with natural
+ * numerical way (not using internal hash value)
+ */
+ if (feat->dif_flags & DT_IND_RANGE)
+ RETURN(-ERANGE);
+
+ if (likely(feat == &dt_directory_features)) {
+ if (udmu_object_is_zap(obj->oo_db))
+ dt->do_index_ops = &osd_dir_ops;
+ else
+ RETURN(-ENOTDIR);
+#if 0
+ } else if (unlikely(feat == &dt_acct_features)) {
+ LASSERT(fid_is_acct(lu_object_fid(&dt->do_lu)));
+ dt->do_index_ops = &osd_acct_index_ops;
+#endif
+ } else if (udmu_object_is_zap(obj->oo_db) &&
+ dt->do_index_ops == NULL) {
+ /* For index file, we don't support variable key & record sizes
+ * and the key has to be unique */
+ if ((feat->dif_flags & ~DT_IND_UPDATE) != 0)
+ RETURN(-EINVAL);
+
+ /* Although the zap_*_uint64() primitives support large keys, we
+ * limit ourselves to 64-bit keys for now */
+ if (feat->dif_keysize_max != sizeof(__u64) ||
+ feat->dif_keysize_min != sizeof(__u64))
+ RETURN(-EINVAL);
+
+ /* As for the record size, it should be a multiple of 8 bytes
+ * and smaller than the maximum value length supported by ZAP.
+ */
+ if (feat->dif_recsize_max > ZAP_MAXVALUELEN)
+ RETURN(-E2BIG);
+ if (feat->dif_recsize_max != feat->dif_recsize_min ||
+ (feat->dif_recsize_max & (sizeof(__u64) - 1)))
+ RETURN(-EINVAL);
+
+ obj->oo_recsize = feat->dif_recsize_max / sizeof(__u64);
+ dt->do_index_ops = &osd_index_ops;
+ }
+
+ RETURN(0);
+}
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff