X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Flod%2Flod_lov.c;h=03388799f42f6887eee002f03f35bed9765bdc35;hp=5973a676fd339dfee2c2aa43af515fc2f65dcf73;hb=abe2d7d54a94f63374557343015f2080e750b9db;hpb=b2287531b63ac56692746a67ea17f576a6d2ab81 diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c index 5973a67..0338879 100644 --- a/lustre/lod/lod_lov.c +++ b/lustre/lod/lod_lov.c @@ -81,7 +81,8 @@ void lod_putref(struct lod_device *lod) continue; cfs_list_add(&ost_desc->ltd_kill, &kill); - /* XXX: remove from the pool */ + + lod_ost_pool_remove(&lod->lod_pool_info, idx); OST_TGT(lod, idx) = NULL; lod->lod_ostnr--; cfs_bitmap_clear(lod->lod_ost_bitmap, idx); @@ -95,11 +96,15 @@ void lod_putref(struct lod_device *lod) cfs_list_for_each_entry_safe(ost_desc, tmp, &kill, ltd_kill) { int rc; cfs_list_del(&ost_desc->ltd_kill); - /* XXX: remove from QoS structures */ - /* disconnect from OSP */ + /* remove from QoS structures */ + rc = qos_del_tgt(lod, ost_desc); + if (rc) + CERROR("%s: qos_del_tgt(%s) failed: rc = %d\n", + lod2obd(lod)->obd_name, + obd_uuid2str(&ost_desc->ltd_uuid), rc); rc = obd_disconnect(ost_desc->ltd_exp); if (rc) - CERROR("%s: failed to disconnect %s (%d)\n", + CERROR("%s: failed to disconnect %s: rc = %d\n", lod2obd(lod)->obd_name, obd_uuid2str(&ost_desc->ltd_uuid), rc); OBD_FREE_PTR(ost_desc); @@ -110,3 +115,904 @@ void lod_putref(struct lod_device *lod) } } +static int lod_bitmap_resize(struct lod_device *lod, __u32 newsize) +{ + cfs_bitmap_t *new_bitmap, *old_bitmap = NULL; + int rc = 0; + ENTRY; + + /* grab write reference on the lod. Relocating the array requires + * exclusive access */ + cfs_down_write(&lod->lod_rw_sem); + + if (newsize <= lod->lod_osts_size) + /* someone else has already resize the array */ + GOTO(out, rc = 0); + + /* allocate new bitmap */ + new_bitmap = CFS_ALLOCATE_BITMAP(newsize); + if (!new_bitmap) + GOTO(out, rc = -ENOMEM); + + if (lod->lod_osts_size > 0) { + /* the bitmap already exists, we need + * to copy data from old one */ + cfs_bitmap_copy(new_bitmap, lod->lod_ost_bitmap); + old_bitmap = lod->lod_ost_bitmap; + } + + lod->lod_osts_size = newsize; + lod->lod_ost_bitmap = new_bitmap; + + if (old_bitmap) + CFS_FREE_BITMAP(old_bitmap); + + CDEBUG(D_CONFIG, "ost size: %d\n", lod->lod_osts_size); + + EXIT; +out: + cfs_up_write(&lod->lod_rw_sem); + return rc; +} + +/* + * Connect LOD to a new OSP and add it to the device table. + * + * \param env - is the environment passed by the caller + * \param lod - is the LOD device to be connected to the new OSP + * \param osp - is the name of OSP device name about to be added + * \param index - is the OSP index + * \param gen - is the generation number + */ +int lod_add_device(const struct lu_env *env, struct lod_device *lod, + char *osp, unsigned index, unsigned gen, int active) +{ + struct obd_connect_data *data = NULL; + struct obd_export *exp = NULL; + struct obd_device *obd; + struct lu_device *ldev; + struct dt_device *d; + int rc; + struct lod_ost_desc *ost_desc; + struct obd_uuid obd_uuid; + + ENTRY; + + CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen); + + if (gen <= 0) { + CERROR("request to add OBD %s with invalid generation: %d\n", + osp, gen); + RETURN(-EINVAL); + } + + obd_str2uuid(&obd_uuid, osp); + + obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME, + &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid); + if (obd == NULL) { + CERROR("can't find %s device\n", osp); + RETURN(-EINVAL); + } + + OBD_ALLOC_PTR(data); + if (data == NULL) + RETURN(-ENOMEM); + + data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION; + data->ocd_version = LUSTRE_VERSION_CODE; + data->ocd_index = index; + + rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL); + OBD_FREE_PTR(data); + if (rc) { + CERROR("%s: cannot connect to next dev %s (%d)\n", + obd->obd_name, osp, rc); + GOTO(out_free, rc); + } + + LASSERT(obd->obd_lu_dev); + LASSERT(obd->obd_lu_dev->ld_site = lod->lod_dt_dev.dd_lu_dev.ld_site); + + ldev = obd->obd_lu_dev; + d = lu2dt_dev(ldev); + + /* Allocate ost descriptor and fill it */ + OBD_ALLOC_PTR(ost_desc); + if (!ost_desc) + GOTO(out_conn, rc = -ENOMEM); + + ost_desc->ltd_ost = d; + ost_desc->ltd_exp = exp; + ost_desc->ltd_uuid = obd->u.cli.cl_target_uuid; + ost_desc->ltd_gen = gen; + ost_desc->ltd_index = index; + ost_desc->ltd_active = active; + + lod_getref(lod); + if (index >= lod->lod_osts_size) { + /* we have to increase the size of the lod_osts array */ + __u32 newsize; + + newsize = max(lod->lod_osts_size, (__u32)2); + while (newsize < index + 1) + newsize = newsize << 1; + + /* lod_bitmap_resize() needs lod_rw_sem + * which we hold with th reference */ + lod_putref(lod); + + rc = lod_bitmap_resize(lod, newsize); + if (rc) + GOTO(out_desc, rc); + + lod_getref(lod); + } + + cfs_mutex_lock(&lod->lod_mutex); + if (cfs_bitmap_check(lod->lod_ost_bitmap, index)) { + CERROR("%s: device %d is registered already\n", obd->obd_name, + index); + GOTO(out_mutex, rc = -EEXIST); + } + + if (lod->lod_ost_idx[index / OST_PTRS_PER_BLOCK] == NULL) { + OBD_ALLOC_PTR(lod->lod_ost_idx[index / OST_PTRS_PER_BLOCK]); + if (lod->lod_ost_idx[index / OST_PTRS_PER_BLOCK] == NULL) { + CERROR("can't allocate index to add %s\n", + obd->obd_name); + GOTO(out_mutex, rc = -ENOMEM); + } + } + + rc = lod_ost_pool_add(&lod->lod_pool_info, index, lod->lod_osts_size); + if (rc) { + CERROR("%s: can't set up pool, failed with %d\n", + obd->obd_name, rc); + GOTO(out_mutex, rc); + } + + rc = qos_add_tgt(lod, ost_desc); + if (rc) { + CERROR("%s: qos_add_tgt(%s) failed: rc = %d\n", obd->obd_name, + obd_uuid2str(&ost_desc->ltd_uuid), rc); + GOTO(out_pool, rc); + } + + /* The new OST is now a full citizen */ + if (index >= lod->lod_desc.ld_tgt_count) + lod->lod_desc.ld_tgt_count = index + 1; + if (active) + lod->lod_desc.ld_active_tgt_count++; + OST_TGT(lod, index) = ost_desc; + cfs_bitmap_set(lod->lod_ost_bitmap, index); + lod->lod_ostnr++; + cfs_mutex_unlock(&lod->lod_mutex); + lod_putref(lod); + + if (lod->lod_recovery_completed) + ldev->ld_ops->ldo_recovery_complete(env, ldev); + + RETURN(0); + +out_pool: + lod_ost_pool_remove(&lod->lod_pool_info, index); +out_mutex: + cfs_mutex_unlock(&lod->lod_mutex); + lod_putref(lod); +out_desc: + OBD_FREE_PTR(ost_desc); +out_conn: + obd_disconnect(exp); +out_free: + return rc; +} + +/* + * helper function to schedule OST removal from the device table + */ +static void __lod_del_device(struct lod_device *lod, unsigned idx) +{ + LASSERT(OST_TGT(lod,idx)); + if (OST_TGT(lod,idx)->ltd_reap == 0) { + OST_TGT(lod,idx)->ltd_reap = 1; + lod->lod_death_row++; + } +} + +/* + * Add support for administratively disabled OST (through the MGS). + * Schedule a target for deletion. Disconnection and real removal from the + * table takes place in lod_putref() once the last table user release its + * reference. + * + * \param env - is the environment passed by the caller + * \param lod - is the lod device currently connected to the OSP about to be + * removed + * \param osp - is the name of OSP device about to be removed + * \param idx - is the OSP index + * \param gen - is the generation number, not used currently + */ +int lod_del_device(const struct lu_env *env, struct lod_device *lod, + char *osp, unsigned idx, unsigned gen) +{ + struct obd_device *obd; + int rc = 0; + struct obd_uuid uuid; + ENTRY; + + CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen); + + obd = class_name2obd(osp); + if (obd == NULL) { + CERROR("can't find %s device\n", osp); + RETURN(-EINVAL); + } + + if (gen <= 0) { + CERROR("%s: request to remove OBD %s with invalid generation %d" + "\n", obd->obd_name, osp, gen); + RETURN(-EINVAL); + } + + obd_str2uuid(&uuid, osp); + + lod_getref(lod); + cfs_mutex_lock(&lod->lod_mutex); + /* check that the index is allocated in the bitmap */ + if (!cfs_bitmap_check(lod->lod_ost_bitmap, idx) || !OST_TGT(lod,idx)) { + CERROR("%s: device %d is not set up\n", obd->obd_name, idx); + GOTO(out, rc = -EINVAL); + } + + /* check that the UUID matches */ + if (!obd_uuid_equals(&uuid, &OST_TGT(lod,idx)->ltd_uuid)) { + CERROR("%s: LOD target UUID %s at index %d does not match %s\n", + obd->obd_name, obd_uuid2str(&OST_TGT(lod,idx)->ltd_uuid), + idx, osp); + GOTO(out, rc = -EINVAL); + } + + __lod_del_device(lod, idx); + EXIT; +out: + cfs_mutex_unlock(&lod->lod_mutex); + lod_putref(lod); + return(rc); +} + +int lod_ea_store_resize(struct lod_thread_info *info, int size) +{ + int round = size_roundup_power2(size); + + LASSERT(round <= lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3)); + if (info->lti_ea_store) { + LASSERT(info->lti_ea_store_size); + LASSERT(info->lti_ea_store_size < round); + CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n", + info->lti_ea_store_size, round); + OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size); + info->lti_ea_store = NULL; + info->lti_ea_store_size = 0; + } + + OBD_ALLOC_LARGE(info->lti_ea_store, round); + if (info->lti_ea_store == NULL) + RETURN(-ENOMEM); + info->lti_ea_store_size = round; + RETURN(0); +} + +/* + * generate and write LOV EA for given striped object + */ +int lod_generate_and_set_lovea(const struct lu_env *env, + struct lod_object *lo, struct thandle *th) +{ + struct lod_thread_info *info = lod_env_info(env); + struct dt_object *next = dt_object_child(&lo->ldo_obj); + const struct lu_fid *fid = lu_object_fid(&lo->ldo_obj.do_lu); + struct lov_mds_md_v1 *lmm; + struct lov_ost_data_v1 *objs; + __u32 magic; + int i, rc, lmm_size; + ENTRY; + + LASSERT(lo); + LASSERT(lo->ldo_stripenr > 0); + + magic = lo->ldo_pool ? LOV_MAGIC_V3 : LOV_MAGIC_V1; + lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic); + if (info->lti_ea_store_size < lmm_size) { + rc = lod_ea_store_resize(info, lmm_size); + if (rc) + RETURN(rc); + } + + lmm = info->lti_ea_store; + + lmm->lmm_magic = cpu_to_le32(magic); + lmm->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0); + lmm->lmm_object_id = cpu_to_le64(fid_ver_oid(fid)); + lmm->lmm_object_seq = cpu_to_le64(fid_seq(fid)); + lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size); + lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr); + lmm->lmm_layout_gen = 0; + if (magic == LOV_MAGIC_V1) { + objs = &lmm->lmm_objects[0]; + } else { + struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm; + strncpy(v3->lmm_pool_name, lo->ldo_pool, LOV_MAXPOOLNAME); + objs = &v3->lmm_objects[0]; + } + + for (i = 0; i < lo->ldo_stripenr; i++) { + const struct lu_fid *fid; + + LASSERT(lo->ldo_stripe[i]); + fid = lu_object_fid(&lo->ldo_stripe[i]->do_lu); + + rc = fid_ostid_pack(fid, &info->lti_ostid); + LASSERT(rc == 0); + LASSERT(info->lti_ostid.oi_seq == FID_SEQ_OST_MDT0); + + objs[i].l_object_id = cpu_to_le64(info->lti_ostid.oi_id); + objs[i].l_object_seq = cpu_to_le64(info->lti_ostid.oi_seq); + objs[i].l_ost_gen = cpu_to_le32(0); + objs[i].l_ost_idx = cpu_to_le32(fid_idif_ost_idx(fid)); + } + + info->lti_buf.lb_buf = lmm; + info->lti_buf.lb_len = lmm_size; + rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, + th, BYPASS_CAPA); + + RETURN(rc); +} + +int lod_get_lov_ea(const struct lu_env *env, struct lod_object *lo) +{ + struct lod_thread_info *info = lod_env_info(env); + struct dt_object *next = dt_object_child(&lo->ldo_obj); + int rc; + ENTRY; + + LASSERT(info); + + if (unlikely(info->lti_ea_store_size == 0)) { + /* just to enter in allocation block below */ + rc = -ERANGE; + } else { +repeat: + info->lti_buf.lb_buf = info->lti_ea_store; + info->lti_buf.lb_len = info->lti_ea_store_size; + rc = dt_xattr_get(env, next, &info->lti_buf, XATTR_NAME_LOV, + BYPASS_CAPA); + } + /* if object is not striped or inaccessible */ + if (rc == -ENODATA) + RETURN(0); + + if (rc == -ERANGE) { + /* EA doesn't fit, reallocate new buffer */ + rc = dt_xattr_get(env, next, &LU_BUF_NULL, XATTR_NAME_LOV, + BYPASS_CAPA); + if (rc == -ENODATA) + RETURN(0); + else if (rc < 0) + RETURN(rc); + + LASSERT(rc > 0); + rc = lod_ea_store_resize(info, rc); + if (rc) + RETURN(rc); + goto repeat; + } + + RETURN(rc); +} + +int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt, + struct thandle *th) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_object *lo = lod_dt_obj(dt); + struct dt_object *next = dt_object_child(dt); + struct lov_user_md_v3 *v3; + int rc; + ENTRY; + + LASSERT(S_ISDIR(dt->do_lu.lo_header->loh_attr)); + + /* + * store striping defaults into new directory + * used to implement defaults inheritance + */ + + /* probably nothing to inherite */ + if (lo->ldo_striping_cached == 0) + RETURN(0); + + if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, lo->ldo_def_stripenr, + lo->ldo_def_stripe_offset)) + RETURN(0); + + /* XXX: use thread info */ + OBD_ALLOC_PTR(v3); + if (v3 == NULL) + RETURN(-ENOMEM); + + v3->lmm_magic = cpu_to_le32(LOV_MAGIC_V3); + v3->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0); + v3->lmm_object_id = 0; + v3->lmm_object_seq = 0; + v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size); + v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr); + v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset); + if (lo->ldo_pool) + strncpy(v3->lmm_pool_name, lo->ldo_pool, LOV_MAXPOOLNAME); + + info->lti_buf.lb_buf = v3; + info->lti_buf.lb_len = sizeof(*v3); + rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, th, + BYPASS_CAPA); + + OBD_FREE_PTR(v3); + + RETURN(rc); +} + +/* + * allocate array of objects pointers, find/create objects + * stripenr and other fields should be initialized by this moment + */ +int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo, + struct lov_ost_data_v1 *objs) +{ + struct lod_thread_info *info = lod_env_info(env); + struct lod_device *md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev); + struct lu_object *o, *n; + struct lu_device *nd; + int i, idx, rc = 0; + ENTRY; + + LASSERT(lo); + LASSERT(lo->ldo_stripe == NULL); + LASSERT(lo->ldo_stripenr > 0); + LASSERT(lo->ldo_stripe_size > 0); + + i = sizeof(struct dt_object *) * lo->ldo_stripenr; + OBD_ALLOC(lo->ldo_stripe, i); + if (lo->ldo_stripe == NULL) + GOTO(out, rc = -ENOMEM); + lo->ldo_stripes_allocated = lo->ldo_stripenr; + + for (i = 0; i < lo->ldo_stripenr; i++) { + + info->lti_ostid.oi_id = le64_to_cpu(objs[i].l_object_id); + /* XXX: support for DNE? */ + info->lti_ostid.oi_seq = le64_to_cpu(objs[i].l_object_seq); + idx = le64_to_cpu(objs[i].l_ost_idx); + fid_ostid_unpack(&info->lti_fid, &info->lti_ostid, idx); + + /* + * XXX: assertion is left for testing, to make + * sure we never process requests till configuration + * is completed. to be changed to -EINVAL + */ + + lod_getref(md); + LASSERT(cfs_bitmap_check(md->lod_ost_bitmap, idx)); + LASSERT(OST_TGT(md,idx)); + LASSERTF(OST_TGT(md,idx)->ltd_ost, "idx %d\n", idx); + nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev; + lod_putref(md); + + o = lu_object_find_at(env, nd, &info->lti_fid, NULL); + if (IS_ERR(o)) + GOTO(out, rc = PTR_ERR(o)); + + n = lu_object_locate(o->lo_header, nd->ld_type); + LASSERT(n); + + lo->ldo_stripe[i] = container_of(n, struct dt_object, do_lu); + } + +out: + RETURN(rc); +} + +/* + * Parse striping information stored in lti_ea_store + */ +int lod_parse_striping(const struct lu_env *env, struct lod_object *lo, + const struct lu_buf *buf) +{ + struct lov_mds_md_v1 *lmm; + struct lov_ost_data_v1 *objs; + __u32 magic; + int rc = 0; + ENTRY; + + LASSERT(buf); + LASSERT(buf->lb_buf); + LASSERT(buf->lb_len); + + lmm = (struct lov_mds_md_v1 *) buf->lb_buf; + magic = le32_to_cpu(lmm->lmm_magic); + + if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3) + GOTO(out, rc = -EINVAL); + if (le32_to_cpu(lmm->lmm_pattern) != LOV_PATTERN_RAID0) + GOTO(out, rc = -EINVAL); + + lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size); + lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count); + lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen); + + LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic)); + + if (magic == LOV_MAGIC_V3) { + struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm; + objs = &v3->lmm_objects[0]; + lod_object_set_pool(lo, v3->lmm_pool_name); + } else { + objs = &lmm->lmm_objects[0]; + } + + rc = lod_initialize_objects(env, lo, objs); + +out: + RETURN(rc); +} + +/* + * Load and parse striping information, create in-core representation for the + * stripes + */ +int lod_load_striping(const struct lu_env *env, struct lod_object *lo) +{ + struct lod_thread_info *info = lod_env_info(env); + struct dt_object *next = dt_object_child(&lo->ldo_obj); + int rc; + ENTRY; + + /* + * currently this code is supposed to be called from declaration + * phase only, thus the object is not expected to be locked by caller + */ + dt_write_lock(env, next, 0); + /* already initialized? */ + if (lo->ldo_stripe) { + int i; + /* check validity */ + for (i = 0; i < lo->ldo_stripenr; i++) + LASSERTF(lo->ldo_stripe[i], "stripe %d is NULL\n", i); + GOTO(out, rc = 0); + } + + if (!dt_object_exists(next)) + GOTO(out, rc = 0); + + /* only regular files can be striped */ + if (!(lu_object_attr(lod2lu_obj(lo)) & S_IFREG)) + GOTO(out, rc = 0); + + LASSERT(lo->ldo_stripenr == 0); + + rc = lod_get_lov_ea(env, lo); + if (rc <= 0) + GOTO(out, rc); + + /* + * there is LOV EA (striping information) in this object + * let's parse it and create in-core objects for the stripes + */ + info->lti_buf.lb_buf = info->lti_ea_store; + info->lti_buf.lb_len = info->lti_ea_store_size; + rc = lod_parse_striping(env, lo, &info->lti_buf); +out: + dt_write_unlock(env, next); + RETURN(rc); +} + +int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf, + int specific) +{ + struct lov_user_md_v1 *lum; + struct lov_user_md_v3 *v3 = NULL; + struct pool_desc *pool = NULL; + int rc; + ENTRY; + + lum = buf->lb_buf; + + if (lum->lmm_magic != LOV_USER_MAGIC_V1 && + lum->lmm_magic != LOV_USER_MAGIC_V3 && + lum->lmm_magic != LOV_MAGIC_V1_DEF && + lum->lmm_magic != LOV_MAGIC_V3_DEF) { + CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", + lum->lmm_magic); + RETURN(-EINVAL); + } + + if ((specific && lum->lmm_pattern != LOV_PATTERN_RAID0) || + (specific == 0 && lum->lmm_pattern != 0)) { + CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n", + lum->lmm_pattern); + RETURN(-EINVAL); + } + + /* 64kB is the largest common page size we see (ia64), and matches the + * check in lfs */ + if (lum->lmm_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) { + CDEBUG(D_IOCTL, "stripe size %u not multiple of %u, fixing\n", + lum->lmm_stripe_size, LOV_MIN_STRIPE_SIZE); + RETURN(-EINVAL); + } + + /* an offset of -1 is treated as a "special" valid offset */ + if (lum->lmm_stripe_offset != (typeof(lum->lmm_stripe_offset))(-1)) { + /* if offset is not within valid range [0, osts_size) */ + if (lum->lmm_stripe_offset >= d->lod_osts_size) { + CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n", + lum->lmm_stripe_offset, d->lod_osts_size); + RETURN(-EINVAL); + } + + /* if lmm_stripe_offset is *not* in bitmap */ + if (!cfs_bitmap_check(d->lod_ost_bitmap, + lum->lmm_stripe_offset)) { + CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n", + lum->lmm_stripe_offset); + RETURN(-EINVAL); + } + } + + if (lum->lmm_magic == LOV_USER_MAGIC_V3) + v3 = buf->lb_buf; + + if (v3) + pool = lod_find_pool(d, v3->lmm_pool_name); + + if (pool != NULL) { + __u16 offs = v3->lmm_stripe_offset; + + if (offs != (typeof(v3->lmm_stripe_offset))(-1)) { + rc = lod_check_index_in_pool(offs, pool); + if (rc < 0) { + lod_pool_putref(pool); + RETURN(-EINVAL); + } + } + + if (specific && lum->lmm_stripe_count > pool_tgt_count(pool)) { + CDEBUG(D_IOCTL, + "stripe count %u > # OSTs %u in the pool\n", + lum->lmm_stripe_count, pool_tgt_count(pool)); + lod_pool_putref(pool); + RETURN(-EINVAL); + } + + lod_pool_putref(pool); + } + + RETURN(0); +} + +void lod_fix_desc_stripe_size(__u64 *val) +{ + if (*val < PTLRPC_MAX_BRW_SIZE) { + LCONSOLE_WARN("Increasing default stripe size to min %u\n", + PTLRPC_MAX_BRW_SIZE); + *val = PTLRPC_MAX_BRW_SIZE; + } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) { + *val &= ~(LOV_MIN_STRIPE_SIZE - 1); + LCONSOLE_WARN("Changing default stripe size to "LPU64" (a " + "multiple of %u)\n", + *val, LOV_MIN_STRIPE_SIZE); + } +} + +void lod_fix_desc_stripe_count(__u32 *val) +{ + if (*val == 0) + *val = 1; +} + +void lod_fix_desc_pattern(__u32 *val) +{ + /* from lov_setstripe */ + if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) { + LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val); + *val = 0; + } +} + +void lod_fix_desc_qos_maxage(__u32 *val) +{ + /* fix qos_maxage */ + if (*val == 0) + *val = QOS_DEFAULT_MAXAGE; +} + +void lod_fix_desc(struct lov_desc *desc) +{ + lod_fix_desc_stripe_size(&desc->ld_default_stripe_size); + lod_fix_desc_stripe_count(&desc->ld_default_stripe_count); + lod_fix_desc_pattern(&desc->ld_pattern); + lod_fix_desc_qos_maxage(&desc->ld_qos_maxage); +} + +int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg) +{ + struct lprocfs_static_vars lvars = { 0 }; + struct obd_device *obd; + struct lov_desc *desc; + int rc; + ENTRY; + + obd = class_name2obd(lustre_cfg_string(lcfg, 0)); + LASSERT(obd != NULL); + obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev; + + if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { + CERROR("LOD setup requires a descriptor\n"); + RETURN(-EINVAL); + } + + desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1); + + if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) { + CERROR("descriptor size wrong: %d > %d\n", + (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1)); + RETURN(-EINVAL); + } + + if (desc->ld_magic != LOV_DESC_MAGIC) { + if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) { + CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n", + obd->obd_name, desc); + lustre_swab_lov_desc(desc); + } else { + CERROR("%s: Bad lov desc magic: %#x\n", + obd->obd_name, desc->ld_magic); + RETURN(-EINVAL); + } + } + + lod_fix_desc(desc); + + desc->ld_active_tgt_count = 0; + lod->lod_desc = *desc; + + lod->lod_sp_me = LUSTRE_SP_CLI; + + /* Set up allocation policy (QoS and RR) */ + CFS_INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list); + cfs_init_rwsem(&lod->lod_qos.lq_rw_sem); + lod->lod_qos.lq_dirty = 1; + lod->lod_qos.lq_rr.lqr_dirty = 1; + lod->lod_qos.lq_reset = 1; + /* Default priority is toward free space balance */ + lod->lod_qos.lq_prio_free = 232; + /* Default threshold for rr (roughly 17%) */ + lod->lod_qos.lq_threshold_rr = 43; + /* Init statfs fields */ + OBD_ALLOC_PTR(lod->lod_qos.lq_statfs_data); + if (NULL == lod->lod_qos.lq_statfs_data) + RETURN(-ENOMEM); + cfs_waitq_init(&lod->lod_qos.lq_statfs_waitq); + + /* Set up OST pool environment */ + lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS, + HASH_POOLS_MAX_BITS, + HASH_POOLS_BKT_BITS, 0, + CFS_HASH_MIN_THETA, + CFS_HASH_MAX_THETA, + &pool_hash_operations, + CFS_HASH_DEFAULT); + if (!lod->lod_pools_hash_body) + GOTO(out_statfs, rc = -ENOMEM); + CFS_INIT_LIST_HEAD(&lod->lod_pool_list); + lod->lod_pool_count = 0; + rc = lod_ost_pool_init(&lod->lod_pool_info, 0); + if (rc) + GOTO(out_hash, rc); + rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0); + if (rc) + GOTO(out_pool_info, rc); + + /* the OST array and bitmap are allocated/grown dynamically as OSTs are + * added to the LOD, see lod_add_device() */ + lod->lod_ost_bitmap = NULL; + lod->lod_osts_size = 0; + lod->lod_ostnr = 0; + + lod->lod_death_row = 0; + lod->lod_refcount = 0; + + lprocfs_lod_init_vars(&lvars); + lprocfs_obd_setup(obd, lvars.obd_vars); + +#ifdef LPROCFS + rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", + 0444, &lod_proc_target_fops, obd); + if (rc) { + CWARN("%s: Error adding the target_obd file %d\n", + obd->obd_name, rc); + GOTO(out_lproc, rc); + } + lod->lod_pool_proc_entry = lprocfs_register("pools", + obd->obd_proc_entry, + NULL, NULL); + if (IS_ERR(lod->lod_pool_proc_entry)) { + int ret = PTR_ERR(lod->lod_pool_proc_entry); + lod->lod_pool_proc_entry = NULL; + CWARN("%s: Failed to create pool proc file %d\n", + obd->obd_name, ret); + rc = lod_pools_fini(lod); + RETURN(ret); + } +#endif + + RETURN(0); + +out_lproc: + lprocfs_obd_cleanup(obd); + lod_ost_pool_free(&lod->lod_qos.lq_rr.lqr_pool); +out_pool_info: + lod_ost_pool_free(&lod->lod_pool_info); +out_hash: + cfs_hash_putref(lod->lod_pools_hash_body); +out_statfs: + OBD_FREE_PTR(lod->lod_qos.lq_statfs_data); + return rc; +} + +int lod_pools_fini(struct lod_device *lod) +{ + struct obd_device *obd = lod2obd(lod); + cfs_list_t *pos, *tmp; + struct pool_desc *pool; + ENTRY; + + cfs_list_for_each_safe(pos, tmp, &lod->lod_pool_list) { + pool = cfs_list_entry(pos, struct pool_desc, pool_list); + /* free pool structs */ + CDEBUG(D_INFO, "delete pool %p\n", pool); + lod_pool_del(obd, pool->pool_name); + } + + if (lod->lod_osts_size > 0) { + int idx; + lod_getref(lod); + cfs_mutex_lock(&lod->lod_mutex); + cfs_foreach_bit(lod->lod_ost_bitmap, idx) + __lod_del_device(lod, idx); + cfs_mutex_unlock(&lod->lod_mutex); + lod_putref(lod); + CFS_FREE_BITMAP(lod->lod_ost_bitmap); + for (idx = 0; idx < OST_PTRS; idx++) { + if (lod->lod_ost_idx[idx]) + OBD_FREE_PTR(lod->lod_ost_idx[idx]); + } + lod->lod_osts_size = 0; + } + + cfs_hash_putref(lod->lod_pools_hash_body); + lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool)); + lod_ost_pool_free(&lod->lod_pool_info); + + /* clear pools parent proc entry only after all pools are killed */ + if (lod->lod_pool_proc_entry) { + lprocfs_remove(&lod->lod_pool_proc_entry); + lod->lod_pool_proc_entry = NULL; + } + + lprocfs_obd_cleanup(obd); + + OBD_FREE_PTR(lod->lod_qos.lq_statfs_data); + RETURN(0); +} +