4954 lines
144 KiB
C
4954 lines
144 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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drbd_nl.c
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This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
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Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
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Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
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Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/drbd.h>
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#include <linux/in.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/slab.h>
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#include <linux/blkpg.h>
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#include <linux/cpumask.h>
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#include "drbd_int.h"
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#include "drbd_protocol.h"
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#include "drbd_req.h"
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#include "drbd_state_change.h"
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#include <asm/unaligned.h>
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#include <linux/drbd_limits.h>
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#include <linux/kthread.h>
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#include <net/genetlink.h>
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/* .doit */
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// int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info);
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// int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_down(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info);
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/* .dumpit */
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int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb);
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int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb);
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int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb);
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int drbd_adm_dump_devices_done(struct netlink_callback *cb);
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int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb);
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int drbd_adm_dump_connections_done(struct netlink_callback *cb);
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int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb);
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int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb);
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int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb);
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#include <linux/drbd_genl_api.h>
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#include "drbd_nla.h"
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#include <linux/genl_magic_func.h>
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static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */
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static atomic_t notify_genl_seq = ATOMIC_INIT(2); /* two. */
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DEFINE_MUTEX(notification_mutex);
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/* used blkdev_get_by_path, to claim our meta data device(s) */
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static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
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static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info)
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{
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genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb))));
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if (genlmsg_reply(skb, info))
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pr_err("error sending genl reply\n");
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}
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/* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only
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* reason it could fail was no space in skb, and there are 4k available. */
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static int drbd_msg_put_info(struct sk_buff *skb, const char *info)
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{
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struct nlattr *nla;
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int err = -EMSGSIZE;
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if (!info || !info[0])
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return 0;
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nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_REPLY);
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if (!nla)
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return err;
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err = nla_put_string(skb, T_info_text, info);
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if (err) {
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nla_nest_cancel(skb, nla);
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return err;
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} else
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nla_nest_end(skb, nla);
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return 0;
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}
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__printf(2, 3)
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static int drbd_msg_sprintf_info(struct sk_buff *skb, const char *fmt, ...)
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{
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va_list args;
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struct nlattr *nla, *txt;
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int err = -EMSGSIZE;
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int len;
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nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_REPLY);
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if (!nla)
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return err;
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txt = nla_reserve(skb, T_info_text, 256);
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if (!txt) {
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nla_nest_cancel(skb, nla);
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return err;
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}
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va_start(args, fmt);
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len = vscnprintf(nla_data(txt), 256, fmt, args);
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va_end(args);
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/* maybe: retry with larger reserve, if truncated */
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txt->nla_len = nla_attr_size(len+1);
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nlmsg_trim(skb, (char*)txt + NLA_ALIGN(txt->nla_len));
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nla_nest_end(skb, nla);
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return 0;
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}
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/* This would be a good candidate for a "pre_doit" hook,
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* and per-family private info->pointers.
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* But we need to stay compatible with older kernels.
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* If it returns successfully, adm_ctx members are valid.
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*
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* At this point, we still rely on the global genl_lock().
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* If we want to avoid that, and allow "genl_family.parallel_ops", we may need
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* to add additional synchronization against object destruction/modification.
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*/
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#define DRBD_ADM_NEED_MINOR 1
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#define DRBD_ADM_NEED_RESOURCE 2
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#define DRBD_ADM_NEED_CONNECTION 4
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static int drbd_adm_prepare(struct drbd_config_context *adm_ctx,
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struct sk_buff *skb, struct genl_info *info, unsigned flags)
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{
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struct drbd_genlmsghdr *d_in = info->userhdr;
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const u8 cmd = info->genlhdr->cmd;
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int err;
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memset(adm_ctx, 0, sizeof(*adm_ctx));
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/* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */
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if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN))
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return -EPERM;
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adm_ctx->reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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if (!adm_ctx->reply_skb) {
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err = -ENOMEM;
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goto fail;
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}
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adm_ctx->reply_dh = genlmsg_put_reply(adm_ctx->reply_skb,
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info, &drbd_genl_family, 0, cmd);
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/* put of a few bytes into a fresh skb of >= 4k will always succeed.
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* but anyways */
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if (!adm_ctx->reply_dh) {
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err = -ENOMEM;
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goto fail;
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}
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adm_ctx->reply_dh->minor = d_in->minor;
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adm_ctx->reply_dh->ret_code = NO_ERROR;
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adm_ctx->volume = VOLUME_UNSPECIFIED;
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if (info->attrs[DRBD_NLA_CFG_CONTEXT]) {
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struct nlattr *nla;
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/* parse and validate only */
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err = drbd_cfg_context_from_attrs(NULL, info);
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if (err)
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goto fail;
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/* It was present, and valid,
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* copy it over to the reply skb. */
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err = nla_put_nohdr(adm_ctx->reply_skb,
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info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len,
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info->attrs[DRBD_NLA_CFG_CONTEXT]);
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if (err)
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goto fail;
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/* and assign stuff to the adm_ctx */
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nla = nested_attr_tb[__nla_type(T_ctx_volume)];
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if (nla)
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adm_ctx->volume = nla_get_u32(nla);
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nla = nested_attr_tb[__nla_type(T_ctx_resource_name)];
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if (nla)
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adm_ctx->resource_name = nla_data(nla);
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adm_ctx->my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)];
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adm_ctx->peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)];
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if ((adm_ctx->my_addr &&
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nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) ||
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(adm_ctx->peer_addr &&
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nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) {
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err = -EINVAL;
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goto fail;
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}
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}
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adm_ctx->minor = d_in->minor;
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adm_ctx->device = minor_to_device(d_in->minor);
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/* We are protected by the global genl_lock().
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* But we may explicitly drop it/retake it in drbd_adm_set_role(),
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* so make sure this object stays around. */
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if (adm_ctx->device)
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kref_get(&adm_ctx->device->kref);
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if (adm_ctx->resource_name) {
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adm_ctx->resource = drbd_find_resource(adm_ctx->resource_name);
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}
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if (!adm_ctx->device && (flags & DRBD_ADM_NEED_MINOR)) {
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drbd_msg_put_info(adm_ctx->reply_skb, "unknown minor");
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return ERR_MINOR_INVALID;
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}
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if (!adm_ctx->resource && (flags & DRBD_ADM_NEED_RESOURCE)) {
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drbd_msg_put_info(adm_ctx->reply_skb, "unknown resource");
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if (adm_ctx->resource_name)
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return ERR_RES_NOT_KNOWN;
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return ERR_INVALID_REQUEST;
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}
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if (flags & DRBD_ADM_NEED_CONNECTION) {
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if (adm_ctx->resource) {
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drbd_msg_put_info(adm_ctx->reply_skb, "no resource name expected");
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return ERR_INVALID_REQUEST;
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}
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if (adm_ctx->device) {
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drbd_msg_put_info(adm_ctx->reply_skb, "no minor number expected");
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return ERR_INVALID_REQUEST;
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}
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if (adm_ctx->my_addr && adm_ctx->peer_addr)
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adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr),
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nla_len(adm_ctx->my_addr),
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nla_data(adm_ctx->peer_addr),
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nla_len(adm_ctx->peer_addr));
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if (!adm_ctx->connection) {
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drbd_msg_put_info(adm_ctx->reply_skb, "unknown connection");
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return ERR_INVALID_REQUEST;
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}
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}
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/* some more paranoia, if the request was over-determined */
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if (adm_ctx->device && adm_ctx->resource &&
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adm_ctx->device->resource != adm_ctx->resource) {
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pr_warn("request: minor=%u, resource=%s; but that minor belongs to resource %s\n",
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adm_ctx->minor, adm_ctx->resource->name,
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adm_ctx->device->resource->name);
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drbd_msg_put_info(adm_ctx->reply_skb, "minor exists in different resource");
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return ERR_INVALID_REQUEST;
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}
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if (adm_ctx->device &&
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adm_ctx->volume != VOLUME_UNSPECIFIED &&
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adm_ctx->volume != adm_ctx->device->vnr) {
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pr_warn("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
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adm_ctx->minor, adm_ctx->volume,
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adm_ctx->device->vnr, adm_ctx->device->resource->name);
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drbd_msg_put_info(adm_ctx->reply_skb, "minor exists as different volume");
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return ERR_INVALID_REQUEST;
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}
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/* still, provide adm_ctx->resource always, if possible. */
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if (!adm_ctx->resource) {
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adm_ctx->resource = adm_ctx->device ? adm_ctx->device->resource
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: adm_ctx->connection ? adm_ctx->connection->resource : NULL;
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if (adm_ctx->resource)
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kref_get(&adm_ctx->resource->kref);
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}
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return NO_ERROR;
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fail:
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nlmsg_free(adm_ctx->reply_skb);
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adm_ctx->reply_skb = NULL;
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return err;
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}
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static int drbd_adm_finish(struct drbd_config_context *adm_ctx,
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struct genl_info *info, int retcode)
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{
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if (adm_ctx->device) {
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kref_put(&adm_ctx->device->kref, drbd_destroy_device);
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adm_ctx->device = NULL;
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}
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if (adm_ctx->connection) {
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kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection);
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adm_ctx->connection = NULL;
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}
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if (adm_ctx->resource) {
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kref_put(&adm_ctx->resource->kref, drbd_destroy_resource);
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adm_ctx->resource = NULL;
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}
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if (!adm_ctx->reply_skb)
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return -ENOMEM;
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adm_ctx->reply_dh->ret_code = retcode;
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drbd_adm_send_reply(adm_ctx->reply_skb, info);
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return 0;
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}
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static void setup_khelper_env(struct drbd_connection *connection, char **envp)
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{
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char *afs;
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/* FIXME: A future version will not allow this case. */
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if (connection->my_addr_len == 0 || connection->peer_addr_len == 0)
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return;
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switch (((struct sockaddr *)&connection->peer_addr)->sa_family) {
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case AF_INET6:
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afs = "ipv6";
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snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
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&((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr);
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break;
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case AF_INET:
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afs = "ipv4";
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snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
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&((struct sockaddr_in *)&connection->peer_addr)->sin_addr);
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break;
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default:
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afs = "ssocks";
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snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
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&((struct sockaddr_in *)&connection->peer_addr)->sin_addr);
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}
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snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
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}
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int drbd_khelper(struct drbd_device *device, char *cmd)
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{
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char *envp[] = { "HOME=/",
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"TERM=linux",
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"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
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(char[20]) { }, /* address family */
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(char[60]) { }, /* address */
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NULL };
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char mb[14];
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char *argv[] = {drbd_usermode_helper, cmd, mb, NULL };
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struct drbd_connection *connection = first_peer_device(device)->connection;
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struct sib_info sib;
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int ret;
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if (current == connection->worker.task)
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set_bit(CALLBACK_PENDING, &connection->flags);
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snprintf(mb, 14, "minor-%d", device_to_minor(device));
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setup_khelper_env(connection, envp);
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/* The helper may take some time.
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* write out any unsynced meta data changes now */
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drbd_md_sync(device);
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drbd_info(device, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, mb);
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sib.sib_reason = SIB_HELPER_PRE;
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sib.helper_name = cmd;
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drbd_bcast_event(device, &sib);
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notify_helper(NOTIFY_CALL, device, connection, cmd, 0);
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ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC);
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if (ret)
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drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n",
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drbd_usermode_helper, cmd, mb,
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(ret >> 8) & 0xff, ret);
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else
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drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n",
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drbd_usermode_helper, cmd, mb,
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(ret >> 8) & 0xff, ret);
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sib.sib_reason = SIB_HELPER_POST;
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sib.helper_exit_code = ret;
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drbd_bcast_event(device, &sib);
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notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret);
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if (current == connection->worker.task)
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clear_bit(CALLBACK_PENDING, &connection->flags);
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if (ret < 0) /* Ignore any ERRNOs we got. */
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ret = 0;
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return ret;
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}
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enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd)
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{
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char *envp[] = { "HOME=/",
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"TERM=linux",
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"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
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(char[20]) { }, /* address family */
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(char[60]) { }, /* address */
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NULL };
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char *resource_name = connection->resource->name;
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char *argv[] = {drbd_usermode_helper, cmd, resource_name, NULL };
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int ret;
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setup_khelper_env(connection, envp);
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conn_md_sync(connection);
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drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name);
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/* TODO: conn_bcast_event() ?? */
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notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0);
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ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC);
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if (ret)
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drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n",
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drbd_usermode_helper, cmd, resource_name,
|
|
(ret >> 8) & 0xff, ret);
|
|
else
|
|
drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n",
|
|
drbd_usermode_helper, cmd, resource_name,
|
|
(ret >> 8) & 0xff, ret);
|
|
/* TODO: conn_bcast_event() ?? */
|
|
notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret);
|
|
|
|
if (ret < 0) /* Ignore any ERRNOs we got. */
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection)
|
|
{
|
|
enum drbd_fencing_p fp = FP_NOT_AVAIL;
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (get_ldev_if_state(device, D_CONSISTENT)) {
|
|
struct disk_conf *disk_conf =
|
|
rcu_dereference(peer_device->device->ldev->disk_conf);
|
|
fp = max_t(enum drbd_fencing_p, fp, disk_conf->fencing);
|
|
put_ldev(device);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return fp;
|
|
}
|
|
|
|
static bool resource_is_supended(struct drbd_resource *resource)
|
|
{
|
|
return resource->susp || resource->susp_fen || resource->susp_nod;
|
|
}
|
|
|
|
bool conn_try_outdate_peer(struct drbd_connection *connection)
|
|
{
|
|
struct drbd_resource * const resource = connection->resource;
|
|
unsigned int connect_cnt;
|
|
union drbd_state mask = { };
|
|
union drbd_state val = { };
|
|
enum drbd_fencing_p fp;
|
|
char *ex_to_string;
|
|
int r;
|
|
|
|
spin_lock_irq(&resource->req_lock);
|
|
if (connection->cstate >= C_WF_REPORT_PARAMS) {
|
|
drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n");
|
|
spin_unlock_irq(&resource->req_lock);
|
|
return false;
|
|
}
|
|
|
|
connect_cnt = connection->connect_cnt;
|
|
spin_unlock_irq(&resource->req_lock);
|
|
|
|
fp = highest_fencing_policy(connection);
|
|
switch (fp) {
|
|
case FP_NOT_AVAIL:
|
|
drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n");
|
|
spin_lock_irq(&resource->req_lock);
|
|
if (connection->cstate < C_WF_REPORT_PARAMS) {
|
|
_conn_request_state(connection,
|
|
(union drbd_state) { { .susp_fen = 1 } },
|
|
(union drbd_state) { { .susp_fen = 0 } },
|
|
CS_VERBOSE | CS_HARD | CS_DC_SUSP);
|
|
/* We are no longer suspended due to the fencing policy.
|
|
* We may still be suspended due to the on-no-data-accessible policy.
|
|
* If that was OND_IO_ERROR, fail pending requests. */
|
|
if (!resource_is_supended(resource))
|
|
_tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);
|
|
}
|
|
/* Else: in case we raced with a connection handshake,
|
|
* let the handshake figure out if we maybe can RESEND,
|
|
* and do not resume/fail pending requests here.
|
|
* Worst case is we stay suspended for now, which may be
|
|
* resolved by either re-establishing the replication link, or
|
|
* the next link failure, or eventually the administrator. */
|
|
spin_unlock_irq(&resource->req_lock);
|
|
return false;
|
|
|
|
case FP_DONT_CARE:
|
|
return true;
|
|
default: ;
|
|
}
|
|
|
|
r = conn_khelper(connection, "fence-peer");
|
|
|
|
switch ((r>>8) & 0xff) {
|
|
case P_INCONSISTENT: /* peer is inconsistent */
|
|
ex_to_string = "peer is inconsistent or worse";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_INCONSISTENT;
|
|
break;
|
|
case P_OUTDATED: /* peer got outdated, or was already outdated */
|
|
ex_to_string = "peer was fenced";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_OUTDATED;
|
|
break;
|
|
case P_DOWN: /* peer was down */
|
|
if (conn_highest_disk(connection) == D_UP_TO_DATE) {
|
|
/* we will(have) create(d) a new UUID anyways... */
|
|
ex_to_string = "peer is unreachable, assumed to be dead";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_OUTDATED;
|
|
} else {
|
|
ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
|
|
}
|
|
break;
|
|
case P_PRIMARY: /* Peer is primary, voluntarily outdate myself.
|
|
* This is useful when an unconnected R_SECONDARY is asked to
|
|
* become R_PRIMARY, but finds the other peer being active. */
|
|
ex_to_string = "peer is active";
|
|
drbd_warn(connection, "Peer is primary, outdating myself.\n");
|
|
mask.disk = D_MASK;
|
|
val.disk = D_OUTDATED;
|
|
break;
|
|
case P_FENCING:
|
|
/* THINK: do we need to handle this
|
|
* like case 4, or more like case 5? */
|
|
if (fp != FP_STONITH)
|
|
drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");
|
|
ex_to_string = "peer was stonithed";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_OUTDATED;
|
|
break;
|
|
default:
|
|
/* The script is broken ... */
|
|
drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
|
|
return false; /* Eventually leave IO frozen */
|
|
}
|
|
|
|
drbd_info(connection, "fence-peer helper returned %d (%s)\n",
|
|
(r>>8) & 0xff, ex_to_string);
|
|
|
|
/* Not using
|
|
conn_request_state(connection, mask, val, CS_VERBOSE);
|
|
here, because we might were able to re-establish the connection in the
|
|
meantime. */
|
|
spin_lock_irq(&resource->req_lock);
|
|
if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) {
|
|
if (connection->connect_cnt != connect_cnt)
|
|
/* In case the connection was established and droped
|
|
while the fence-peer handler was running, ignore it */
|
|
drbd_info(connection, "Ignoring fence-peer exit code\n");
|
|
else
|
|
_conn_request_state(connection, mask, val, CS_VERBOSE);
|
|
}
|
|
spin_unlock_irq(&resource->req_lock);
|
|
|
|
return conn_highest_pdsk(connection) <= D_OUTDATED;
|
|
}
|
|
|
|
static int _try_outdate_peer_async(void *data)
|
|
{
|
|
struct drbd_connection *connection = (struct drbd_connection *)data;
|
|
|
|
conn_try_outdate_peer(connection);
|
|
|
|
kref_put(&connection->kref, drbd_destroy_connection);
|
|
return 0;
|
|
}
|
|
|
|
void conn_try_outdate_peer_async(struct drbd_connection *connection)
|
|
{
|
|
struct task_struct *opa;
|
|
|
|
kref_get(&connection->kref);
|
|
/* We may have just sent a signal to this thread
|
|
* to get it out of some blocking network function.
|
|
* Clear signals; otherwise kthread_run(), which internally uses
|
|
* wait_on_completion_killable(), will mistake our pending signal
|
|
* for a new fatal signal and fail. */
|
|
flush_signals(current);
|
|
opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h");
|
|
if (IS_ERR(opa)) {
|
|
drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n");
|
|
kref_put(&connection->kref, drbd_destroy_connection);
|
|
}
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force)
|
|
{
|
|
struct drbd_peer_device *const peer_device = first_peer_device(device);
|
|
struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
|
|
const int max_tries = 4;
|
|
enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
|
|
struct net_conf *nc;
|
|
int try = 0;
|
|
int forced = 0;
|
|
union drbd_state mask, val;
|
|
|
|
if (new_role == R_PRIMARY) {
|
|
struct drbd_connection *connection;
|
|
|
|
/* Detect dead peers as soon as possible. */
|
|
|
|
rcu_read_lock();
|
|
for_each_connection(connection, device->resource)
|
|
request_ping(connection);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
mutex_lock(device->state_mutex);
|
|
|
|
mask.i = 0; mask.role = R_MASK;
|
|
val.i = 0; val.role = new_role;
|
|
|
|
while (try++ < max_tries) {
|
|
rv = _drbd_request_state_holding_state_mutex(device, mask, val, CS_WAIT_COMPLETE);
|
|
|
|
/* in case we first succeeded to outdate,
|
|
* but now suddenly could establish a connection */
|
|
if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
|
|
val.pdsk = 0;
|
|
mask.pdsk = 0;
|
|
continue;
|
|
}
|
|
|
|
if (rv == SS_NO_UP_TO_DATE_DISK && force &&
|
|
(device->state.disk < D_UP_TO_DATE &&
|
|
device->state.disk >= D_INCONSISTENT)) {
|
|
mask.disk = D_MASK;
|
|
val.disk = D_UP_TO_DATE;
|
|
forced = 1;
|
|
continue;
|
|
}
|
|
|
|
if (rv == SS_NO_UP_TO_DATE_DISK &&
|
|
device->state.disk == D_CONSISTENT && mask.pdsk == 0) {
|
|
D_ASSERT(device, device->state.pdsk == D_UNKNOWN);
|
|
|
|
if (conn_try_outdate_peer(connection)) {
|
|
val.disk = D_UP_TO_DATE;
|
|
mask.disk = D_MASK;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (rv == SS_NOTHING_TO_DO)
|
|
goto out;
|
|
if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
|
|
if (!conn_try_outdate_peer(connection) && force) {
|
|
drbd_warn(device, "Forced into split brain situation!\n");
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_OUTDATED;
|
|
|
|
}
|
|
continue;
|
|
}
|
|
if (rv == SS_TWO_PRIMARIES) {
|
|
/* Maybe the peer is detected as dead very soon...
|
|
retry at most once more in this case. */
|
|
if (try < max_tries) {
|
|
int timeo;
|
|
try = max_tries - 1;
|
|
rcu_read_lock();
|
|
nc = rcu_dereference(connection->net_conf);
|
|
timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
|
|
rcu_read_unlock();
|
|
schedule_timeout_interruptible(timeo);
|
|
}
|
|
continue;
|
|
}
|
|
if (rv < SS_SUCCESS) {
|
|
rv = _drbd_request_state(device, mask, val,
|
|
CS_VERBOSE + CS_WAIT_COMPLETE);
|
|
if (rv < SS_SUCCESS)
|
|
goto out;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (rv < SS_SUCCESS)
|
|
goto out;
|
|
|
|
if (forced)
|
|
drbd_warn(device, "Forced to consider local data as UpToDate!\n");
|
|
|
|
/* Wait until nothing is on the fly :) */
|
|
wait_event(device->misc_wait, atomic_read(&device->ap_pending_cnt) == 0);
|
|
|
|
/* FIXME also wait for all pending P_BARRIER_ACK? */
|
|
|
|
if (new_role == R_SECONDARY) {
|
|
if (get_ldev(device)) {
|
|
device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
|
|
put_ldev(device);
|
|
}
|
|
} else {
|
|
mutex_lock(&device->resource->conf_update);
|
|
nc = connection->net_conf;
|
|
if (nc)
|
|
nc->discard_my_data = 0; /* without copy; single bit op is atomic */
|
|
mutex_unlock(&device->resource->conf_update);
|
|
|
|
if (get_ldev(device)) {
|
|
if (((device->state.conn < C_CONNECTED ||
|
|
device->state.pdsk <= D_FAILED)
|
|
&& device->ldev->md.uuid[UI_BITMAP] == 0) || forced)
|
|
drbd_uuid_new_current(device);
|
|
|
|
device->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
|
put_ldev(device);
|
|
}
|
|
}
|
|
|
|
/* writeout of activity log covered areas of the bitmap
|
|
* to stable storage done in after state change already */
|
|
|
|
if (device->state.conn >= C_WF_REPORT_PARAMS) {
|
|
/* if this was forced, we should consider sync */
|
|
if (forced)
|
|
drbd_send_uuids(peer_device);
|
|
drbd_send_current_state(peer_device);
|
|
}
|
|
|
|
drbd_md_sync(device);
|
|
set_disk_ro(device->vdisk, new_role == R_SECONDARY);
|
|
kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
|
|
out:
|
|
mutex_unlock(device->state_mutex);
|
|
return rv;
|
|
}
|
|
|
|
static const char *from_attrs_err_to_txt(int err)
|
|
{
|
|
return err == -ENOMSG ? "required attribute missing" :
|
|
err == -EOPNOTSUPP ? "unknown mandatory attribute" :
|
|
err == -EEXIST ? "can not change invariant setting" :
|
|
"invalid attribute value";
|
|
}
|
|
|
|
int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct set_role_parms parms;
|
|
int err;
|
|
enum drbd_ret_code retcode;
|
|
enum drbd_state_rv rv;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
memset(&parms, 0, sizeof(parms));
|
|
if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) {
|
|
err = set_role_parms_from_attrs(&parms, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
}
|
|
genl_unlock();
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
|
|
rv = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate);
|
|
else
|
|
rv = drbd_set_role(adm_ctx.device, R_SECONDARY, 0);
|
|
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
genl_lock();
|
|
drbd_adm_finish(&adm_ctx, info, rv);
|
|
return 0;
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
/* Initializes the md.*_offset members, so we are able to find
|
|
* the on disk meta data.
|
|
*
|
|
* We currently have two possible layouts:
|
|
* external:
|
|
* |----------- md_size_sect ------------------|
|
|
* [ 4k superblock ][ activity log ][ Bitmap ]
|
|
* | al_offset == 8 |
|
|
* | bm_offset = al_offset + X |
|
|
* ==> bitmap sectors = md_size_sect - bm_offset
|
|
*
|
|
* internal:
|
|
* |----------- md_size_sect ------------------|
|
|
* [data.....][ Bitmap ][ activity log ][ 4k superblock ]
|
|
* | al_offset < 0 |
|
|
* | bm_offset = al_offset - Y |
|
|
* ==> bitmap sectors = Y = al_offset - bm_offset
|
|
*
|
|
* Activity log size used to be fixed 32kB,
|
|
* but is about to become configurable.
|
|
*/
|
|
static void drbd_md_set_sector_offsets(struct drbd_device *device,
|
|
struct drbd_backing_dev *bdev)
|
|
{
|
|
sector_t md_size_sect = 0;
|
|
unsigned int al_size_sect = bdev->md.al_size_4k * 8;
|
|
|
|
bdev->md.md_offset = drbd_md_ss(bdev);
|
|
|
|
switch (bdev->md.meta_dev_idx) {
|
|
default:
|
|
/* v07 style fixed size indexed meta data */
|
|
bdev->md.md_size_sect = MD_128MB_SECT;
|
|
bdev->md.al_offset = MD_4kB_SECT;
|
|
bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
|
|
break;
|
|
case DRBD_MD_INDEX_FLEX_EXT:
|
|
/* just occupy the full device; unit: sectors */
|
|
bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev);
|
|
bdev->md.al_offset = MD_4kB_SECT;
|
|
bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
|
|
break;
|
|
case DRBD_MD_INDEX_INTERNAL:
|
|
case DRBD_MD_INDEX_FLEX_INT:
|
|
/* al size is still fixed */
|
|
bdev->md.al_offset = -al_size_sect;
|
|
/* we need (slightly less than) ~ this much bitmap sectors: */
|
|
md_size_sect = drbd_get_capacity(bdev->backing_bdev);
|
|
md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT);
|
|
md_size_sect = BM_SECT_TO_EXT(md_size_sect);
|
|
md_size_sect = ALIGN(md_size_sect, 8);
|
|
|
|
/* plus the "drbd meta data super block",
|
|
* and the activity log; */
|
|
md_size_sect += MD_4kB_SECT + al_size_sect;
|
|
|
|
bdev->md.md_size_sect = md_size_sect;
|
|
/* bitmap offset is adjusted by 'super' block size */
|
|
bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* input size is expected to be in KB */
|
|
char *ppsize(char *buf, unsigned long long size)
|
|
{
|
|
/* Needs 9 bytes at max including trailing NUL:
|
|
* -1ULL ==> "16384 EB" */
|
|
static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
|
|
int base = 0;
|
|
while (size >= 10000 && base < sizeof(units)-1) {
|
|
/* shift + round */
|
|
size = (size >> 10) + !!(size & (1<<9));
|
|
base++;
|
|
}
|
|
sprintf(buf, "%u %cB", (unsigned)size, units[base]);
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* there is still a theoretical deadlock when called from receiver
|
|
* on an D_INCONSISTENT R_PRIMARY:
|
|
* remote READ does inc_ap_bio, receiver would need to receive answer
|
|
* packet from remote to dec_ap_bio again.
|
|
* receiver receive_sizes(), comes here,
|
|
* waits for ap_bio_cnt == 0. -> deadlock.
|
|
* but this cannot happen, actually, because:
|
|
* R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
|
|
* (not connected, or bad/no disk on peer):
|
|
* see drbd_fail_request_early, ap_bio_cnt is zero.
|
|
* R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
|
|
* peer may not initiate a resize.
|
|
*/
|
|
/* Note these are not to be confused with
|
|
* drbd_adm_suspend_io/drbd_adm_resume_io,
|
|
* which are (sub) state changes triggered by admin (drbdsetup),
|
|
* and can be long lived.
|
|
* This changes an device->flag, is triggered by drbd internals,
|
|
* and should be short-lived. */
|
|
/* It needs to be a counter, since multiple threads might
|
|
independently suspend and resume IO. */
|
|
void drbd_suspend_io(struct drbd_device *device)
|
|
{
|
|
atomic_inc(&device->suspend_cnt);
|
|
if (drbd_suspended(device))
|
|
return;
|
|
wait_event(device->misc_wait, !atomic_read(&device->ap_bio_cnt));
|
|
}
|
|
|
|
void drbd_resume_io(struct drbd_device *device)
|
|
{
|
|
if (atomic_dec_and_test(&device->suspend_cnt))
|
|
wake_up(&device->misc_wait);
|
|
}
|
|
|
|
/*
|
|
* drbd_determine_dev_size() - Sets the right device size obeying all constraints
|
|
* @device: DRBD device.
|
|
*
|
|
* Returns 0 on success, negative return values indicate errors.
|
|
* You should call drbd_md_sync() after calling this function.
|
|
*/
|
|
enum determine_dev_size
|
|
drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct resize_parms *rs) __must_hold(local)
|
|
{
|
|
struct md_offsets_and_sizes {
|
|
u64 last_agreed_sect;
|
|
u64 md_offset;
|
|
s32 al_offset;
|
|
s32 bm_offset;
|
|
u32 md_size_sect;
|
|
|
|
u32 al_stripes;
|
|
u32 al_stripe_size_4k;
|
|
} prev;
|
|
sector_t u_size, size;
|
|
struct drbd_md *md = &device->ldev->md;
|
|
void *buffer;
|
|
|
|
int md_moved, la_size_changed;
|
|
enum determine_dev_size rv = DS_UNCHANGED;
|
|
|
|
/* We may change the on-disk offsets of our meta data below. Lock out
|
|
* anything that may cause meta data IO, to avoid acting on incomplete
|
|
* layout changes or scribbling over meta data that is in the process
|
|
* of being moved.
|
|
*
|
|
* Move is not exactly correct, btw, currently we have all our meta
|
|
* data in core memory, to "move" it we just write it all out, there
|
|
* are no reads. */
|
|
drbd_suspend_io(device);
|
|
buffer = drbd_md_get_buffer(device, __func__); /* Lock meta-data IO */
|
|
if (!buffer) {
|
|
drbd_resume_io(device);
|
|
return DS_ERROR;
|
|
}
|
|
|
|
/* remember current offset and sizes */
|
|
prev.last_agreed_sect = md->la_size_sect;
|
|
prev.md_offset = md->md_offset;
|
|
prev.al_offset = md->al_offset;
|
|
prev.bm_offset = md->bm_offset;
|
|
prev.md_size_sect = md->md_size_sect;
|
|
prev.al_stripes = md->al_stripes;
|
|
prev.al_stripe_size_4k = md->al_stripe_size_4k;
|
|
|
|
if (rs) {
|
|
/* rs is non NULL if we should change the AL layout only */
|
|
md->al_stripes = rs->al_stripes;
|
|
md->al_stripe_size_4k = rs->al_stripe_size / 4;
|
|
md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4;
|
|
}
|
|
|
|
drbd_md_set_sector_offsets(device, device->ldev);
|
|
|
|
rcu_read_lock();
|
|
u_size = rcu_dereference(device->ldev->disk_conf)->disk_size;
|
|
rcu_read_unlock();
|
|
size = drbd_new_dev_size(device, device->ldev, u_size, flags & DDSF_FORCED);
|
|
|
|
if (size < prev.last_agreed_sect) {
|
|
if (rs && u_size == 0) {
|
|
/* Remove "rs &&" later. This check should always be active, but
|
|
right now the receiver expects the permissive behavior */
|
|
drbd_warn(device, "Implicit shrink not allowed. "
|
|
"Use --size=%llus for explicit shrink.\n",
|
|
(unsigned long long)size);
|
|
rv = DS_ERROR_SHRINK;
|
|
}
|
|
if (u_size > size)
|
|
rv = DS_ERROR_SPACE_MD;
|
|
if (rv != DS_UNCHANGED)
|
|
goto err_out;
|
|
}
|
|
|
|
if (get_capacity(device->vdisk) != size ||
|
|
drbd_bm_capacity(device) != size) {
|
|
int err;
|
|
err = drbd_bm_resize(device, size, !(flags & DDSF_NO_RESYNC));
|
|
if (unlikely(err)) {
|
|
/* currently there is only one error: ENOMEM! */
|
|
size = drbd_bm_capacity(device);
|
|
if (size == 0) {
|
|
drbd_err(device, "OUT OF MEMORY! "
|
|
"Could not allocate bitmap!\n");
|
|
} else {
|
|
drbd_err(device, "BM resizing failed. "
|
|
"Leaving size unchanged\n");
|
|
}
|
|
rv = DS_ERROR;
|
|
}
|
|
/* racy, see comments above. */
|
|
drbd_set_my_capacity(device, size);
|
|
md->la_size_sect = size;
|
|
}
|
|
if (rv <= DS_ERROR)
|
|
goto err_out;
|
|
|
|
la_size_changed = (prev.last_agreed_sect != md->la_size_sect);
|
|
|
|
md_moved = prev.md_offset != md->md_offset
|
|
|| prev.md_size_sect != md->md_size_sect;
|
|
|
|
if (la_size_changed || md_moved || rs) {
|
|
u32 prev_flags;
|
|
|
|
/* We do some synchronous IO below, which may take some time.
|
|
* Clear the timer, to avoid scary "timer expired!" messages,
|
|
* "Superblock" is written out at least twice below, anyways. */
|
|
del_timer(&device->md_sync_timer);
|
|
|
|
/* We won't change the "al-extents" setting, we just may need
|
|
* to move the on-disk location of the activity log ringbuffer.
|
|
* Lock for transaction is good enough, it may well be "dirty"
|
|
* or even "starving". */
|
|
wait_event(device->al_wait, lc_try_lock_for_transaction(device->act_log));
|
|
|
|
/* mark current on-disk bitmap and activity log as unreliable */
|
|
prev_flags = md->flags;
|
|
md->flags |= MDF_FULL_SYNC | MDF_AL_DISABLED;
|
|
drbd_md_write(device, buffer);
|
|
|
|
drbd_al_initialize(device, buffer);
|
|
|
|
drbd_info(device, "Writing the whole bitmap, %s\n",
|
|
la_size_changed && md_moved ? "size changed and md moved" :
|
|
la_size_changed ? "size changed" : "md moved");
|
|
/* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
|
|
drbd_bitmap_io(device, md_moved ? &drbd_bm_write_all : &drbd_bm_write,
|
|
"size changed", BM_LOCKED_MASK);
|
|
|
|
/* on-disk bitmap and activity log is authoritative again
|
|
* (unless there was an IO error meanwhile...) */
|
|
md->flags = prev_flags;
|
|
drbd_md_write(device, buffer);
|
|
|
|
if (rs)
|
|
drbd_info(device, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n",
|
|
md->al_stripes, md->al_stripe_size_4k * 4);
|
|
}
|
|
|
|
if (size > prev.last_agreed_sect)
|
|
rv = prev.last_agreed_sect ? DS_GREW : DS_GREW_FROM_ZERO;
|
|
if (size < prev.last_agreed_sect)
|
|
rv = DS_SHRUNK;
|
|
|
|
if (0) {
|
|
err_out:
|
|
/* restore previous offset and sizes */
|
|
md->la_size_sect = prev.last_agreed_sect;
|
|
md->md_offset = prev.md_offset;
|
|
md->al_offset = prev.al_offset;
|
|
md->bm_offset = prev.bm_offset;
|
|
md->md_size_sect = prev.md_size_sect;
|
|
md->al_stripes = prev.al_stripes;
|
|
md->al_stripe_size_4k = prev.al_stripe_size_4k;
|
|
md->al_size_4k = (u64)prev.al_stripes * prev.al_stripe_size_4k;
|
|
}
|
|
lc_unlock(device->act_log);
|
|
wake_up(&device->al_wait);
|
|
drbd_md_put_buffer(device);
|
|
drbd_resume_io(device);
|
|
|
|
return rv;
|
|
}
|
|
|
|
sector_t
|
|
drbd_new_dev_size(struct drbd_device *device, struct drbd_backing_dev *bdev,
|
|
sector_t u_size, int assume_peer_has_space)
|
|
{
|
|
sector_t p_size = device->p_size; /* partner's disk size. */
|
|
sector_t la_size_sect = bdev->md.la_size_sect; /* last agreed size. */
|
|
sector_t m_size; /* my size */
|
|
sector_t size = 0;
|
|
|
|
m_size = drbd_get_max_capacity(bdev);
|
|
|
|
if (device->state.conn < C_CONNECTED && assume_peer_has_space) {
|
|
drbd_warn(device, "Resize while not connected was forced by the user!\n");
|
|
p_size = m_size;
|
|
}
|
|
|
|
if (p_size && m_size) {
|
|
size = min_t(sector_t, p_size, m_size);
|
|
} else {
|
|
if (la_size_sect) {
|
|
size = la_size_sect;
|
|
if (m_size && m_size < size)
|
|
size = m_size;
|
|
if (p_size && p_size < size)
|
|
size = p_size;
|
|
} else {
|
|
if (m_size)
|
|
size = m_size;
|
|
if (p_size)
|
|
size = p_size;
|
|
}
|
|
}
|
|
|
|
if (size == 0)
|
|
drbd_err(device, "Both nodes diskless!\n");
|
|
|
|
if (u_size) {
|
|
if (u_size > size)
|
|
drbd_err(device, "Requested disk size is too big (%lu > %lu)\n",
|
|
(unsigned long)u_size>>1, (unsigned long)size>>1);
|
|
else
|
|
size = u_size;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
/*
|
|
* drbd_check_al_size() - Ensures that the AL is of the right size
|
|
* @device: DRBD device.
|
|
*
|
|
* Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
|
|
* failed, and 0 on success. You should call drbd_md_sync() after you called
|
|
* this function.
|
|
*/
|
|
static int drbd_check_al_size(struct drbd_device *device, struct disk_conf *dc)
|
|
{
|
|
struct lru_cache *n, *t;
|
|
struct lc_element *e;
|
|
unsigned int in_use;
|
|
int i;
|
|
|
|
if (device->act_log &&
|
|
device->act_log->nr_elements == dc->al_extents)
|
|
return 0;
|
|
|
|
in_use = 0;
|
|
t = device->act_log;
|
|
n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION,
|
|
dc->al_extents, sizeof(struct lc_element), 0);
|
|
|
|
if (n == NULL) {
|
|
drbd_err(device, "Cannot allocate act_log lru!\n");
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_irq(&device->al_lock);
|
|
if (t) {
|
|
for (i = 0; i < t->nr_elements; i++) {
|
|
e = lc_element_by_index(t, i);
|
|
if (e->refcnt)
|
|
drbd_err(device, "refcnt(%d)==%d\n",
|
|
e->lc_number, e->refcnt);
|
|
in_use += e->refcnt;
|
|
}
|
|
}
|
|
if (!in_use)
|
|
device->act_log = n;
|
|
spin_unlock_irq(&device->al_lock);
|
|
if (in_use) {
|
|
drbd_err(device, "Activity log still in use!\n");
|
|
lc_destroy(n);
|
|
return -EBUSY;
|
|
} else {
|
|
lc_destroy(t);
|
|
}
|
|
drbd_md_mark_dirty(device); /* we changed device->act_log->nr_elemens */
|
|
return 0;
|
|
}
|
|
|
|
static void blk_queue_discard_granularity(struct request_queue *q, unsigned int granularity)
|
|
{
|
|
q->limits.discard_granularity = granularity;
|
|
}
|
|
|
|
static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)
|
|
{
|
|
/* when we introduced REQ_WRITE_SAME support, we also bumped
|
|
* our maximum supported batch bio size used for discards. */
|
|
if (connection->agreed_features & DRBD_FF_WSAME)
|
|
return DRBD_MAX_BBIO_SECTORS;
|
|
/* before, with DRBD <= 8.4.6, we only allowed up to one AL_EXTENT_SIZE. */
|
|
return AL_EXTENT_SIZE >> 9;
|
|
}
|
|
|
|
static void decide_on_discard_support(struct drbd_device *device,
|
|
struct drbd_backing_dev *bdev)
|
|
{
|
|
struct drbd_connection *connection =
|
|
first_peer_device(device)->connection;
|
|
struct request_queue *q = device->rq_queue;
|
|
unsigned int max_discard_sectors;
|
|
|
|
if (bdev && !bdev_max_discard_sectors(bdev->backing_bdev))
|
|
goto not_supported;
|
|
|
|
if (connection->cstate >= C_CONNECTED &&
|
|
!(connection->agreed_features & DRBD_FF_TRIM)) {
|
|
drbd_info(connection,
|
|
"peer DRBD too old, does not support TRIM: disabling discards\n");
|
|
goto not_supported;
|
|
}
|
|
|
|
/*
|
|
* We don't care for the granularity, really.
|
|
*
|
|
* Stacking limits below should fix it for the local device. Whether or
|
|
* not it is a suitable granularity on the remote device is not our
|
|
* problem, really. If you care, you need to use devices with similar
|
|
* topology on all peers.
|
|
*/
|
|
blk_queue_discard_granularity(q, 512);
|
|
max_discard_sectors = drbd_max_discard_sectors(connection);
|
|
blk_queue_max_discard_sectors(q, max_discard_sectors);
|
|
blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
|
|
return;
|
|
|
|
not_supported:
|
|
blk_queue_discard_granularity(q, 0);
|
|
blk_queue_max_discard_sectors(q, 0);
|
|
}
|
|
|
|
static void fixup_write_zeroes(struct drbd_device *device, struct request_queue *q)
|
|
{
|
|
/* Fixup max_write_zeroes_sectors after blk_stack_limits():
|
|
* if we can handle "zeroes" efficiently on the protocol,
|
|
* we want to do that, even if our backend does not announce
|
|
* max_write_zeroes_sectors itself. */
|
|
struct drbd_connection *connection = first_peer_device(device)->connection;
|
|
/* If the peer announces WZEROES support, use it. Otherwise, rather
|
|
* send explicit zeroes than rely on some discard-zeroes-data magic. */
|
|
if (connection->agreed_features & DRBD_FF_WZEROES)
|
|
q->limits.max_write_zeroes_sectors = DRBD_MAX_BBIO_SECTORS;
|
|
else
|
|
q->limits.max_write_zeroes_sectors = 0;
|
|
}
|
|
|
|
static void fixup_discard_support(struct drbd_device *device, struct request_queue *q)
|
|
{
|
|
unsigned int max_discard = device->rq_queue->limits.max_discard_sectors;
|
|
unsigned int discard_granularity =
|
|
device->rq_queue->limits.discard_granularity >> SECTOR_SHIFT;
|
|
|
|
if (discard_granularity > max_discard) {
|
|
blk_queue_discard_granularity(q, 0);
|
|
blk_queue_max_discard_sectors(q, 0);
|
|
}
|
|
}
|
|
|
|
static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev,
|
|
unsigned int max_bio_size, struct o_qlim *o)
|
|
{
|
|
struct request_queue * const q = device->rq_queue;
|
|
unsigned int max_hw_sectors = max_bio_size >> 9;
|
|
unsigned int max_segments = 0;
|
|
struct request_queue *b = NULL;
|
|
struct disk_conf *dc;
|
|
|
|
if (bdev) {
|
|
b = bdev->backing_bdev->bd_disk->queue;
|
|
|
|
max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
|
|
rcu_read_lock();
|
|
dc = rcu_dereference(device->ldev->disk_conf);
|
|
max_segments = dc->max_bio_bvecs;
|
|
rcu_read_unlock();
|
|
|
|
blk_set_stacking_limits(&q->limits);
|
|
}
|
|
|
|
blk_queue_max_hw_sectors(q, max_hw_sectors);
|
|
/* This is the workaround for "bio would need to, but cannot, be split" */
|
|
blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
|
|
blk_queue_segment_boundary(q, PAGE_SIZE-1);
|
|
decide_on_discard_support(device, bdev);
|
|
|
|
if (b) {
|
|
blk_stack_limits(&q->limits, &b->limits, 0);
|
|
disk_update_readahead(device->vdisk);
|
|
}
|
|
fixup_write_zeroes(device, q);
|
|
fixup_discard_support(device, q);
|
|
}
|
|
|
|
void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev, struct o_qlim *o)
|
|
{
|
|
unsigned int now, new, local, peer;
|
|
|
|
now = queue_max_hw_sectors(device->rq_queue) << 9;
|
|
local = device->local_max_bio_size; /* Eventually last known value, from volatile memory */
|
|
peer = device->peer_max_bio_size; /* Eventually last known value, from meta data */
|
|
|
|
if (bdev) {
|
|
local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9;
|
|
device->local_max_bio_size = local;
|
|
}
|
|
local = min(local, DRBD_MAX_BIO_SIZE);
|
|
|
|
/* We may ignore peer limits if the peer is modern enough.
|
|
Because new from 8.3.8 onwards the peer can use multiple
|
|
BIOs for a single peer_request */
|
|
if (device->state.conn >= C_WF_REPORT_PARAMS) {
|
|
if (first_peer_device(device)->connection->agreed_pro_version < 94)
|
|
peer = min(device->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
|
|
/* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */
|
|
else if (first_peer_device(device)->connection->agreed_pro_version == 94)
|
|
peer = DRBD_MAX_SIZE_H80_PACKET;
|
|
else if (first_peer_device(device)->connection->agreed_pro_version < 100)
|
|
peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */
|
|
else
|
|
peer = DRBD_MAX_BIO_SIZE;
|
|
|
|
/* We may later detach and re-attach on a disconnected Primary.
|
|
* Avoid this setting to jump back in that case.
|
|
* We want to store what we know the peer DRBD can handle,
|
|
* not what the peer IO backend can handle. */
|
|
if (peer > device->peer_max_bio_size)
|
|
device->peer_max_bio_size = peer;
|
|
}
|
|
new = min(local, peer);
|
|
|
|
if (device->state.role == R_PRIMARY && new < now)
|
|
drbd_err(device, "ASSERT FAILED new < now; (%u < %u)\n", new, now);
|
|
|
|
if (new != now)
|
|
drbd_info(device, "max BIO size = %u\n", new);
|
|
|
|
drbd_setup_queue_param(device, bdev, new, o);
|
|
}
|
|
|
|
/* Starts the worker thread */
|
|
static void conn_reconfig_start(struct drbd_connection *connection)
|
|
{
|
|
drbd_thread_start(&connection->worker);
|
|
drbd_flush_workqueue(&connection->sender_work);
|
|
}
|
|
|
|
/* if still unconfigured, stops worker again. */
|
|
static void conn_reconfig_done(struct drbd_connection *connection)
|
|
{
|
|
bool stop_threads;
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
stop_threads = conn_all_vols_unconf(connection) &&
|
|
connection->cstate == C_STANDALONE;
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
if (stop_threads) {
|
|
/* ack_receiver thread and ack_sender workqueue are implicitly
|
|
* stopped by receiver in conn_disconnect() */
|
|
drbd_thread_stop(&connection->receiver);
|
|
drbd_thread_stop(&connection->worker);
|
|
}
|
|
}
|
|
|
|
/* Make sure IO is suspended before calling this function(). */
|
|
static void drbd_suspend_al(struct drbd_device *device)
|
|
{
|
|
int s = 0;
|
|
|
|
if (!lc_try_lock(device->act_log)) {
|
|
drbd_warn(device, "Failed to lock al in drbd_suspend_al()\n");
|
|
return;
|
|
}
|
|
|
|
drbd_al_shrink(device);
|
|
spin_lock_irq(&device->resource->req_lock);
|
|
if (device->state.conn < C_CONNECTED)
|
|
s = !test_and_set_bit(AL_SUSPENDED, &device->flags);
|
|
spin_unlock_irq(&device->resource->req_lock);
|
|
lc_unlock(device->act_log);
|
|
|
|
if (s)
|
|
drbd_info(device, "Suspended AL updates\n");
|
|
}
|
|
|
|
|
|
static bool should_set_defaults(struct genl_info *info)
|
|
{
|
|
unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags;
|
|
return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS);
|
|
}
|
|
|
|
static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev)
|
|
{
|
|
/* This is limited by 16 bit "slot" numbers,
|
|
* and by available on-disk context storage.
|
|
*
|
|
* Also (u16)~0 is special (denotes a "free" extent).
|
|
*
|
|
* One transaction occupies one 4kB on-disk block,
|
|
* we have n such blocks in the on disk ring buffer,
|
|
* the "current" transaction may fail (n-1),
|
|
* and there is 919 slot numbers context information per transaction.
|
|
*
|
|
* 72 transaction blocks amounts to more than 2**16 context slots,
|
|
* so cap there first.
|
|
*/
|
|
const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX;
|
|
const unsigned int sufficient_on_disk =
|
|
(max_al_nr + AL_CONTEXT_PER_TRANSACTION -1)
|
|
/AL_CONTEXT_PER_TRANSACTION;
|
|
|
|
unsigned int al_size_4k = bdev->md.al_size_4k;
|
|
|
|
if (al_size_4k > sufficient_on_disk)
|
|
return max_al_nr;
|
|
|
|
return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION;
|
|
}
|
|
|
|
static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b)
|
|
{
|
|
return a->disk_barrier != b->disk_barrier ||
|
|
a->disk_flushes != b->disk_flushes ||
|
|
a->disk_drain != b->disk_drain;
|
|
}
|
|
|
|
static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *disk_conf,
|
|
struct drbd_backing_dev *nbc)
|
|
{
|
|
struct block_device *bdev = nbc->backing_bdev;
|
|
|
|
if (disk_conf->al_extents < DRBD_AL_EXTENTS_MIN)
|
|
disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
|
|
if (disk_conf->al_extents > drbd_al_extents_max(nbc))
|
|
disk_conf->al_extents = drbd_al_extents_max(nbc);
|
|
|
|
if (!bdev_max_discard_sectors(bdev)) {
|
|
if (disk_conf->rs_discard_granularity) {
|
|
disk_conf->rs_discard_granularity = 0; /* disable feature */
|
|
drbd_info(device, "rs_discard_granularity feature disabled\n");
|
|
}
|
|
}
|
|
|
|
if (disk_conf->rs_discard_granularity) {
|
|
int orig_value = disk_conf->rs_discard_granularity;
|
|
sector_t discard_size = bdev_max_discard_sectors(bdev) << 9;
|
|
unsigned int discard_granularity = bdev_discard_granularity(bdev);
|
|
int remainder;
|
|
|
|
if (discard_granularity > disk_conf->rs_discard_granularity)
|
|
disk_conf->rs_discard_granularity = discard_granularity;
|
|
|
|
remainder = disk_conf->rs_discard_granularity %
|
|
discard_granularity;
|
|
disk_conf->rs_discard_granularity += remainder;
|
|
|
|
if (disk_conf->rs_discard_granularity > discard_size)
|
|
disk_conf->rs_discard_granularity = discard_size;
|
|
|
|
if (disk_conf->rs_discard_granularity != orig_value)
|
|
drbd_info(device, "rs_discard_granularity changed to %d\n",
|
|
disk_conf->rs_discard_granularity);
|
|
}
|
|
}
|
|
|
|
static int disk_opts_check_al_size(struct drbd_device *device, struct disk_conf *dc)
|
|
{
|
|
int err = -EBUSY;
|
|
|
|
if (device->act_log &&
|
|
device->act_log->nr_elements == dc->al_extents)
|
|
return 0;
|
|
|
|
drbd_suspend_io(device);
|
|
/* If IO completion is currently blocked, we would likely wait
|
|
* "forever" for the activity log to become unused. So we don't. */
|
|
if (atomic_read(&device->ap_bio_cnt))
|
|
goto out;
|
|
|
|
wait_event(device->al_wait, lc_try_lock(device->act_log));
|
|
drbd_al_shrink(device);
|
|
err = drbd_check_al_size(device, dc);
|
|
lc_unlock(device->act_log);
|
|
wake_up(&device->al_wait);
|
|
out:
|
|
drbd_resume_io(device);
|
|
return err;
|
|
}
|
|
|
|
int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct drbd_device *device;
|
|
struct disk_conf *new_disk_conf, *old_disk_conf;
|
|
struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
|
|
int err;
|
|
unsigned int fifo_size;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
device = adm_ctx.device;
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
/* we also need a disk
|
|
* to change the options on */
|
|
if (!get_ldev(device)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
|
|
if (!new_disk_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
mutex_lock(&device->resource->conf_update);
|
|
old_disk_conf = device->ldev->disk_conf;
|
|
*new_disk_conf = *old_disk_conf;
|
|
if (should_set_defaults(info))
|
|
set_disk_conf_defaults(new_disk_conf);
|
|
|
|
err = disk_conf_from_attrs_for_change(new_disk_conf, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail_unlock;
|
|
}
|
|
|
|
if (!expect(device, new_disk_conf->resync_rate >= 1))
|
|
new_disk_conf->resync_rate = 1;
|
|
|
|
sanitize_disk_conf(device, new_disk_conf, device->ldev);
|
|
|
|
if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
|
|
new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
|
|
|
|
fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
|
|
if (fifo_size != device->rs_plan_s->size) {
|
|
new_plan = fifo_alloc(fifo_size);
|
|
if (!new_plan) {
|
|
drbd_err(device, "kmalloc of fifo_buffer failed");
|
|
retcode = ERR_NOMEM;
|
|
goto fail_unlock;
|
|
}
|
|
}
|
|
|
|
err = disk_opts_check_al_size(device, new_disk_conf);
|
|
if (err) {
|
|
/* Could be just "busy". Ignore?
|
|
* Introduce dedicated error code? */
|
|
drbd_msg_put_info(adm_ctx.reply_skb,
|
|
"Try again without changing current al-extents setting");
|
|
retcode = ERR_NOMEM;
|
|
goto fail_unlock;
|
|
}
|
|
|
|
lock_all_resources();
|
|
retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after);
|
|
if (retcode == NO_ERROR) {
|
|
rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf);
|
|
drbd_resync_after_changed(device);
|
|
}
|
|
unlock_all_resources();
|
|
|
|
if (retcode != NO_ERROR)
|
|
goto fail_unlock;
|
|
|
|
if (new_plan) {
|
|
old_plan = device->rs_plan_s;
|
|
rcu_assign_pointer(device->rs_plan_s, new_plan);
|
|
}
|
|
|
|
mutex_unlock(&device->resource->conf_update);
|
|
|
|
if (new_disk_conf->al_updates)
|
|
device->ldev->md.flags &= ~MDF_AL_DISABLED;
|
|
else
|
|
device->ldev->md.flags |= MDF_AL_DISABLED;
|
|
|
|
if (new_disk_conf->md_flushes)
|
|
clear_bit(MD_NO_FUA, &device->flags);
|
|
else
|
|
set_bit(MD_NO_FUA, &device->flags);
|
|
|
|
if (write_ordering_changed(old_disk_conf, new_disk_conf))
|
|
drbd_bump_write_ordering(device->resource, NULL, WO_BDEV_FLUSH);
|
|
|
|
if (old_disk_conf->discard_zeroes_if_aligned !=
|
|
new_disk_conf->discard_zeroes_if_aligned)
|
|
drbd_reconsider_queue_parameters(device, device->ldev, NULL);
|
|
|
|
drbd_md_sync(device);
|
|
|
|
if (device->state.conn >= C_CONNECTED) {
|
|
struct drbd_peer_device *peer_device;
|
|
|
|
for_each_peer_device(peer_device, device)
|
|
drbd_send_sync_param(peer_device);
|
|
}
|
|
|
|
kvfree_rcu(old_disk_conf);
|
|
kfree(old_plan);
|
|
mod_timer(&device->request_timer, jiffies + HZ);
|
|
goto success;
|
|
|
|
fail_unlock:
|
|
mutex_unlock(&device->resource->conf_update);
|
|
fail:
|
|
kfree(new_disk_conf);
|
|
kfree(new_plan);
|
|
success:
|
|
put_ldev(device);
|
|
out:
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static struct block_device *open_backing_dev(struct drbd_device *device,
|
|
const char *bdev_path, void *claim_ptr, bool do_bd_link)
|
|
{
|
|
struct block_device *bdev;
|
|
int err = 0;
|
|
|
|
bdev = blkdev_get_by_path(bdev_path,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL, claim_ptr);
|
|
if (IS_ERR(bdev)) {
|
|
drbd_err(device, "open(\"%s\") failed with %ld\n",
|
|
bdev_path, PTR_ERR(bdev));
|
|
return bdev;
|
|
}
|
|
|
|
if (!do_bd_link)
|
|
return bdev;
|
|
|
|
err = bd_link_disk_holder(bdev, device->vdisk);
|
|
if (err) {
|
|
blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
drbd_err(device, "bd_link_disk_holder(\"%s\", ...) failed with %d\n",
|
|
bdev_path, err);
|
|
bdev = ERR_PTR(err);
|
|
}
|
|
return bdev;
|
|
}
|
|
|
|
static int open_backing_devices(struct drbd_device *device,
|
|
struct disk_conf *new_disk_conf,
|
|
struct drbd_backing_dev *nbc)
|
|
{
|
|
struct block_device *bdev;
|
|
|
|
bdev = open_backing_dev(device, new_disk_conf->backing_dev, device, true);
|
|
if (IS_ERR(bdev))
|
|
return ERR_OPEN_DISK;
|
|
nbc->backing_bdev = bdev;
|
|
|
|
/*
|
|
* meta_dev_idx >= 0: external fixed size, possibly multiple
|
|
* drbd sharing one meta device. TODO in that case, paranoia
|
|
* check that [md_bdev, meta_dev_idx] is not yet used by some
|
|
* other drbd minor! (if you use drbd.conf + drbdadm, that
|
|
* should check it for you already; but if you don't, or
|
|
* someone fooled it, we need to double check here)
|
|
*/
|
|
bdev = open_backing_dev(device, new_disk_conf->meta_dev,
|
|
/* claim ptr: device, if claimed exclusively; shared drbd_m_holder,
|
|
* if potentially shared with other drbd minors */
|
|
(new_disk_conf->meta_dev_idx < 0) ? (void*)device : (void*)drbd_m_holder,
|
|
/* avoid double bd_claim_by_disk() for the same (source,target) tuple,
|
|
* as would happen with internal metadata. */
|
|
(new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_FLEX_INT &&
|
|
new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_INTERNAL));
|
|
if (IS_ERR(bdev))
|
|
return ERR_OPEN_MD_DISK;
|
|
nbc->md_bdev = bdev;
|
|
return NO_ERROR;
|
|
}
|
|
|
|
static void close_backing_dev(struct drbd_device *device, struct block_device *bdev,
|
|
bool do_bd_unlink)
|
|
{
|
|
if (!bdev)
|
|
return;
|
|
if (do_bd_unlink)
|
|
bd_unlink_disk_holder(bdev, device->vdisk);
|
|
blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
}
|
|
|
|
void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev)
|
|
{
|
|
if (ldev == NULL)
|
|
return;
|
|
|
|
close_backing_dev(device, ldev->md_bdev, ldev->md_bdev != ldev->backing_bdev);
|
|
close_backing_dev(device, ldev->backing_bdev, true);
|
|
|
|
kfree(ldev->disk_conf);
|
|
kfree(ldev);
|
|
}
|
|
|
|
int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_device *device;
|
|
struct drbd_peer_device *peer_device;
|
|
struct drbd_connection *connection;
|
|
int err;
|
|
enum drbd_ret_code retcode;
|
|
enum determine_dev_size dd;
|
|
sector_t max_possible_sectors;
|
|
sector_t min_md_device_sectors;
|
|
struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */
|
|
struct disk_conf *new_disk_conf = NULL;
|
|
struct lru_cache *resync_lru = NULL;
|
|
struct fifo_buffer *new_plan = NULL;
|
|
union drbd_state ns, os;
|
|
enum drbd_state_rv rv;
|
|
struct net_conf *nc;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
device = adm_ctx.device;
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
peer_device = first_peer_device(device);
|
|
connection = peer_device->connection;
|
|
conn_reconfig_start(connection);
|
|
|
|
/* if you want to reconfigure, please tear down first */
|
|
if (device->state.disk > D_DISKLESS) {
|
|
retcode = ERR_DISK_CONFIGURED;
|
|
goto fail;
|
|
}
|
|
/* It may just now have detached because of IO error. Make sure
|
|
* drbd_ldev_destroy is done already, we may end up here very fast,
|
|
* e.g. if someone calls attach from the on-io-error handler,
|
|
* to realize a "hot spare" feature (not that I'd recommend that) */
|
|
wait_event(device->misc_wait, !test_bit(GOING_DISKLESS, &device->flags));
|
|
|
|
/* make sure there is no leftover from previous force-detach attempts */
|
|
clear_bit(FORCE_DETACH, &device->flags);
|
|
clear_bit(WAS_IO_ERROR, &device->flags);
|
|
clear_bit(WAS_READ_ERROR, &device->flags);
|
|
|
|
/* and no leftover from previously aborted resync or verify, either */
|
|
device->rs_total = 0;
|
|
device->rs_failed = 0;
|
|
atomic_set(&device->rs_pending_cnt, 0);
|
|
|
|
/* allocation not in the IO path, drbdsetup context */
|
|
nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
|
|
if (!nbc) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
spin_lock_init(&nbc->md.uuid_lock);
|
|
|
|
new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
|
|
if (!new_disk_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
nbc->disk_conf = new_disk_conf;
|
|
|
|
set_disk_conf_defaults(new_disk_conf);
|
|
err = disk_conf_from_attrs(new_disk_conf, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
|
|
new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
|
|
|
|
new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ);
|
|
if (!new_plan) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) {
|
|
retcode = ERR_MD_IDX_INVALID;
|
|
goto fail;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
nc = rcu_dereference(connection->net_conf);
|
|
if (nc) {
|
|
if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
|
|
rcu_read_unlock();
|
|
retcode = ERR_STONITH_AND_PROT_A;
|
|
goto fail;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
retcode = open_backing_devices(device, new_disk_conf, nbc);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
if ((nbc->backing_bdev == nbc->md_bdev) !=
|
|
(new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
|
|
new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) {
|
|
retcode = ERR_MD_IDX_INVALID;
|
|
goto fail;
|
|
}
|
|
|
|
resync_lru = lc_create("resync", drbd_bm_ext_cache,
|
|
1, 61, sizeof(struct bm_extent),
|
|
offsetof(struct bm_extent, lce));
|
|
if (!resync_lru) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* Read our meta data super block early.
|
|
* This also sets other on-disk offsets. */
|
|
retcode = drbd_md_read(device, nbc);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
sanitize_disk_conf(device, new_disk_conf, nbc);
|
|
|
|
if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) {
|
|
drbd_err(device, "max capacity %llu smaller than disk size %llu\n",
|
|
(unsigned long long) drbd_get_max_capacity(nbc),
|
|
(unsigned long long) new_disk_conf->disk_size);
|
|
retcode = ERR_DISK_TOO_SMALL;
|
|
goto fail;
|
|
}
|
|
|
|
if (new_disk_conf->meta_dev_idx < 0) {
|
|
max_possible_sectors = DRBD_MAX_SECTORS_FLEX;
|
|
/* at least one MB, otherwise it does not make sense */
|
|
min_md_device_sectors = (2<<10);
|
|
} else {
|
|
max_possible_sectors = DRBD_MAX_SECTORS;
|
|
min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1);
|
|
}
|
|
|
|
if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
|
|
retcode = ERR_MD_DISK_TOO_SMALL;
|
|
drbd_warn(device, "refusing attach: md-device too small, "
|
|
"at least %llu sectors needed for this meta-disk type\n",
|
|
(unsigned long long) min_md_device_sectors);
|
|
goto fail;
|
|
}
|
|
|
|
/* Make sure the new disk is big enough
|
|
* (we may currently be R_PRIMARY with no local disk...) */
|
|
if (drbd_get_max_capacity(nbc) < get_capacity(device->vdisk)) {
|
|
retcode = ERR_DISK_TOO_SMALL;
|
|
goto fail;
|
|
}
|
|
|
|
nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
|
|
|
|
if (nbc->known_size > max_possible_sectors) {
|
|
drbd_warn(device, "==> truncating very big lower level device "
|
|
"to currently maximum possible %llu sectors <==\n",
|
|
(unsigned long long) max_possible_sectors);
|
|
if (new_disk_conf->meta_dev_idx >= 0)
|
|
drbd_warn(device, "==>> using internal or flexible "
|
|
"meta data may help <<==\n");
|
|
}
|
|
|
|
drbd_suspend_io(device);
|
|
/* also wait for the last barrier ack. */
|
|
/* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171
|
|
* We need a way to either ignore barrier acks for barriers sent before a device
|
|
* was attached, or a way to wait for all pending barrier acks to come in.
|
|
* As barriers are counted per resource,
|
|
* we'd need to suspend io on all devices of a resource.
|
|
*/
|
|
wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device));
|
|
/* and for any other previously queued work */
|
|
drbd_flush_workqueue(&connection->sender_work);
|
|
|
|
rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE);
|
|
retcode = (enum drbd_ret_code)rv;
|
|
drbd_resume_io(device);
|
|
if (rv < SS_SUCCESS)
|
|
goto fail;
|
|
|
|
if (!get_ldev_if_state(device, D_ATTACHING))
|
|
goto force_diskless;
|
|
|
|
if (!device->bitmap) {
|
|
if (drbd_bm_init(device)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
if (device->state.pdsk != D_UP_TO_DATE && device->ed_uuid &&
|
|
(device->state.role == R_PRIMARY || device->state.peer == R_PRIMARY) &&
|
|
(device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
|
|
drbd_err(device, "Can only attach to data with current UUID=%016llX\n",
|
|
(unsigned long long)device->ed_uuid);
|
|
retcode = ERR_DATA_NOT_CURRENT;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Since we are diskless, fix the activity log first... */
|
|
if (drbd_check_al_size(device, new_disk_conf)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Prevent shrinking of consistent devices ! */
|
|
{
|
|
unsigned long long nsz = drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0);
|
|
unsigned long long eff = nbc->md.la_size_sect;
|
|
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && nsz < eff) {
|
|
if (nsz == nbc->disk_conf->disk_size) {
|
|
drbd_warn(device, "truncating a consistent device during attach (%llu < %llu)\n", nsz, eff);
|
|
} else {
|
|
drbd_warn(device, "refusing to truncate a consistent device (%llu < %llu)\n", nsz, eff);
|
|
drbd_msg_sprintf_info(adm_ctx.reply_skb,
|
|
"To-be-attached device has last effective > current size, and is consistent\n"
|
|
"(%llu > %llu sectors). Refusing to attach.", eff, nsz);
|
|
retcode = ERR_IMPLICIT_SHRINK;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
}
|
|
|
|
lock_all_resources();
|
|
retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after);
|
|
if (retcode != NO_ERROR) {
|
|
unlock_all_resources();
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Reset the "barriers don't work" bits here, then force meta data to
|
|
* be written, to ensure we determine if barriers are supported. */
|
|
if (new_disk_conf->md_flushes)
|
|
clear_bit(MD_NO_FUA, &device->flags);
|
|
else
|
|
set_bit(MD_NO_FUA, &device->flags);
|
|
|
|
/* Point of no return reached.
|
|
* Devices and memory are no longer released by error cleanup below.
|
|
* now device takes over responsibility, and the state engine should
|
|
* clean it up somewhere. */
|
|
D_ASSERT(device, device->ldev == NULL);
|
|
device->ldev = nbc;
|
|
device->resync = resync_lru;
|
|
device->rs_plan_s = new_plan;
|
|
nbc = NULL;
|
|
resync_lru = NULL;
|
|
new_disk_conf = NULL;
|
|
new_plan = NULL;
|
|
|
|
drbd_resync_after_changed(device);
|
|
drbd_bump_write_ordering(device->resource, device->ldev, WO_BDEV_FLUSH);
|
|
unlock_all_resources();
|
|
|
|
if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY))
|
|
set_bit(CRASHED_PRIMARY, &device->flags);
|
|
else
|
|
clear_bit(CRASHED_PRIMARY, &device->flags);
|
|
|
|
if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) &&
|
|
!(device->state.role == R_PRIMARY && device->resource->susp_nod))
|
|
set_bit(CRASHED_PRIMARY, &device->flags);
|
|
|
|
device->send_cnt = 0;
|
|
device->recv_cnt = 0;
|
|
device->read_cnt = 0;
|
|
device->writ_cnt = 0;
|
|
|
|
drbd_reconsider_queue_parameters(device, device->ldev, NULL);
|
|
|
|
/* If I am currently not R_PRIMARY,
|
|
* but meta data primary indicator is set,
|
|
* I just now recover from a hard crash,
|
|
* and have been R_PRIMARY before that crash.
|
|
*
|
|
* Now, if I had no connection before that crash
|
|
* (have been degraded R_PRIMARY), chances are that
|
|
* I won't find my peer now either.
|
|
*
|
|
* In that case, and _only_ in that case,
|
|
* we use the degr-wfc-timeout instead of the default,
|
|
* so we can automatically recover from a crash of a
|
|
* degraded but active "cluster" after a certain timeout.
|
|
*/
|
|
clear_bit(USE_DEGR_WFC_T, &device->flags);
|
|
if (device->state.role != R_PRIMARY &&
|
|
drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) &&
|
|
!drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND))
|
|
set_bit(USE_DEGR_WFC_T, &device->flags);
|
|
|
|
dd = drbd_determine_dev_size(device, 0, NULL);
|
|
if (dd <= DS_ERROR) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto force_diskless_dec;
|
|
} else if (dd == DS_GREW)
|
|
set_bit(RESYNC_AFTER_NEG, &device->flags);
|
|
|
|
if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ||
|
|
(test_bit(CRASHED_PRIMARY, &device->flags) &&
|
|
drbd_md_test_flag(device->ldev, MDF_AL_DISABLED))) {
|
|
drbd_info(device, "Assuming that all blocks are out of sync "
|
|
"(aka FullSync)\n");
|
|
if (drbd_bitmap_io(device, &drbd_bmio_set_n_write,
|
|
"set_n_write from attaching", BM_LOCKED_MASK)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
} else {
|
|
if (drbd_bitmap_io(device, &drbd_bm_read,
|
|
"read from attaching", BM_LOCKED_MASK)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
if (_drbd_bm_total_weight(device) == drbd_bm_bits(device))
|
|
drbd_suspend_al(device); /* IO is still suspended here... */
|
|
|
|
spin_lock_irq(&device->resource->req_lock);
|
|
os = drbd_read_state(device);
|
|
ns = os;
|
|
/* If MDF_CONSISTENT is not set go into inconsistent state,
|
|
otherwise investigate MDF_WasUpToDate...
|
|
If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
|
|
otherwise into D_CONSISTENT state.
|
|
*/
|
|
if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) {
|
|
if (drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE))
|
|
ns.disk = D_CONSISTENT;
|
|
else
|
|
ns.disk = D_OUTDATED;
|
|
} else {
|
|
ns.disk = D_INCONSISTENT;
|
|
}
|
|
|
|
if (drbd_md_test_flag(device->ldev, MDF_PEER_OUT_DATED))
|
|
ns.pdsk = D_OUTDATED;
|
|
|
|
rcu_read_lock();
|
|
if (ns.disk == D_CONSISTENT &&
|
|
(ns.pdsk == D_OUTDATED || rcu_dereference(device->ldev->disk_conf)->fencing == FP_DONT_CARE))
|
|
ns.disk = D_UP_TO_DATE;
|
|
|
|
/* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
|
|
MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
|
|
this point, because drbd_request_state() modifies these
|
|
flags. */
|
|
|
|
if (rcu_dereference(device->ldev->disk_conf)->al_updates)
|
|
device->ldev->md.flags &= ~MDF_AL_DISABLED;
|
|
else
|
|
device->ldev->md.flags |= MDF_AL_DISABLED;
|
|
|
|
rcu_read_unlock();
|
|
|
|
/* In case we are C_CONNECTED postpone any decision on the new disk
|
|
state after the negotiation phase. */
|
|
if (device->state.conn == C_CONNECTED) {
|
|
device->new_state_tmp.i = ns.i;
|
|
ns.i = os.i;
|
|
ns.disk = D_NEGOTIATING;
|
|
|
|
/* We expect to receive up-to-date UUIDs soon.
|
|
To avoid a race in receive_state, free p_uuid while
|
|
holding req_lock. I.e. atomic with the state change */
|
|
kfree(device->p_uuid);
|
|
device->p_uuid = NULL;
|
|
}
|
|
|
|
rv = _drbd_set_state(device, ns, CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&device->resource->req_lock);
|
|
|
|
if (rv < SS_SUCCESS)
|
|
goto force_diskless_dec;
|
|
|
|
mod_timer(&device->request_timer, jiffies + HZ);
|
|
|
|
if (device->state.role == R_PRIMARY)
|
|
device->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
|
else
|
|
device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
|
|
|
|
drbd_md_mark_dirty(device);
|
|
drbd_md_sync(device);
|
|
|
|
kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
|
|
put_ldev(device);
|
|
conn_reconfig_done(connection);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
|
|
force_diskless_dec:
|
|
put_ldev(device);
|
|
force_diskless:
|
|
drbd_force_state(device, NS(disk, D_DISKLESS));
|
|
drbd_md_sync(device);
|
|
fail:
|
|
conn_reconfig_done(connection);
|
|
if (nbc) {
|
|
close_backing_dev(device, nbc->md_bdev, nbc->md_bdev != nbc->backing_bdev);
|
|
close_backing_dev(device, nbc->backing_bdev, true);
|
|
kfree(nbc);
|
|
}
|
|
kfree(new_disk_conf);
|
|
lc_destroy(resync_lru);
|
|
kfree(new_plan);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int adm_detach(struct drbd_device *device, int force)
|
|
{
|
|
if (force) {
|
|
set_bit(FORCE_DETACH, &device->flags);
|
|
drbd_force_state(device, NS(disk, D_FAILED));
|
|
return SS_SUCCESS;
|
|
}
|
|
|
|
return drbd_request_detach_interruptible(device);
|
|
}
|
|
|
|
/* Detaching the disk is a process in multiple stages. First we need to lock
|
|
* out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
|
|
* Then we transition to D_DISKLESS, and wait for put_ldev() to return all
|
|
* internal references as well.
|
|
* Only then we have finally detached. */
|
|
int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct detach_parms parms = { };
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (info->attrs[DRBD_NLA_DETACH_PARMS]) {
|
|
err = detach_parms_from_attrs(&parms, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
retcode = adm_detach(adm_ctx.device, parms.force_detach);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static bool conn_resync_running(struct drbd_connection *connection)
|
|
{
|
|
struct drbd_peer_device *peer_device;
|
|
bool rv = false;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (device->state.conn == C_SYNC_SOURCE ||
|
|
device->state.conn == C_SYNC_TARGET ||
|
|
device->state.conn == C_PAUSED_SYNC_S ||
|
|
device->state.conn == C_PAUSED_SYNC_T) {
|
|
rv = true;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
static bool conn_ov_running(struct drbd_connection *connection)
|
|
{
|
|
struct drbd_peer_device *peer_device;
|
|
bool rv = false;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (device->state.conn == C_VERIFY_S ||
|
|
device->state.conn == C_VERIFY_T) {
|
|
rv = true;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
_check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf)
|
|
{
|
|
struct drbd_peer_device *peer_device;
|
|
int i;
|
|
|
|
if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) {
|
|
if (new_net_conf->wire_protocol != old_net_conf->wire_protocol)
|
|
return ERR_NEED_APV_100;
|
|
|
|
if (new_net_conf->two_primaries != old_net_conf->two_primaries)
|
|
return ERR_NEED_APV_100;
|
|
|
|
if (strcmp(new_net_conf->integrity_alg, old_net_conf->integrity_alg))
|
|
return ERR_NEED_APV_100;
|
|
}
|
|
|
|
if (!new_net_conf->two_primaries &&
|
|
conn_highest_role(connection) == R_PRIMARY &&
|
|
conn_highest_peer(connection) == R_PRIMARY)
|
|
return ERR_NEED_ALLOW_TWO_PRI;
|
|
|
|
if (new_net_conf->two_primaries &&
|
|
(new_net_conf->wire_protocol != DRBD_PROT_C))
|
|
return ERR_NOT_PROTO_C;
|
|
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (get_ldev(device)) {
|
|
enum drbd_fencing_p fp = rcu_dereference(device->ldev->disk_conf)->fencing;
|
|
put_ldev(device);
|
|
if (new_net_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
|
|
return ERR_STONITH_AND_PROT_A;
|
|
}
|
|
if (device->state.role == R_PRIMARY && new_net_conf->discard_my_data)
|
|
return ERR_DISCARD_IMPOSSIBLE;
|
|
}
|
|
|
|
if (new_net_conf->on_congestion != OC_BLOCK && new_net_conf->wire_protocol != DRBD_PROT_A)
|
|
return ERR_CONG_NOT_PROTO_A;
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf)
|
|
{
|
|
enum drbd_ret_code rv;
|
|
struct drbd_peer_device *peer_device;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf);
|
|
rcu_read_unlock();
|
|
|
|
/* connection->peer_devices protected by genl_lock() here */
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (!device->bitmap) {
|
|
if (drbd_bm_init(device))
|
|
return ERR_NOMEM;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
struct crypto {
|
|
struct crypto_shash *verify_tfm;
|
|
struct crypto_shash *csums_tfm;
|
|
struct crypto_shash *cram_hmac_tfm;
|
|
struct crypto_shash *integrity_tfm;
|
|
};
|
|
|
|
static int
|
|
alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg)
|
|
{
|
|
if (!tfm_name[0])
|
|
return NO_ERROR;
|
|
|
|
*tfm = crypto_alloc_shash(tfm_name, 0, 0);
|
|
if (IS_ERR(*tfm)) {
|
|
*tfm = NULL;
|
|
return err_alg;
|
|
}
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
|
|
{
|
|
char hmac_name[CRYPTO_MAX_ALG_NAME];
|
|
enum drbd_ret_code rv;
|
|
|
|
rv = alloc_shash(&crypto->csums_tfm, new_net_conf->csums_alg,
|
|
ERR_CSUMS_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
rv = alloc_shash(&crypto->verify_tfm, new_net_conf->verify_alg,
|
|
ERR_VERIFY_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
rv = alloc_shash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
|
|
ERR_INTEGRITY_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
if (new_net_conf->cram_hmac_alg[0] != 0) {
|
|
snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
|
|
new_net_conf->cram_hmac_alg);
|
|
|
|
rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name,
|
|
ERR_AUTH_ALG);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void free_crypto(struct crypto *crypto)
|
|
{
|
|
crypto_free_shash(crypto->cram_hmac_tfm);
|
|
crypto_free_shash(crypto->integrity_tfm);
|
|
crypto_free_shash(crypto->csums_tfm);
|
|
crypto_free_shash(crypto->verify_tfm);
|
|
}
|
|
|
|
int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct drbd_connection *connection;
|
|
struct net_conf *old_net_conf, *new_net_conf = NULL;
|
|
int err;
|
|
int ovr; /* online verify running */
|
|
int rsr; /* re-sync running */
|
|
struct crypto crypto = { };
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
connection = adm_ctx.connection;
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
|
|
if (!new_net_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto out;
|
|
}
|
|
|
|
conn_reconfig_start(connection);
|
|
|
|
mutex_lock(&connection->data.mutex);
|
|
mutex_lock(&connection->resource->conf_update);
|
|
old_net_conf = connection->net_conf;
|
|
|
|
if (!old_net_conf) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "net conf missing, try connect");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto fail;
|
|
}
|
|
|
|
*new_net_conf = *old_net_conf;
|
|
if (should_set_defaults(info))
|
|
set_net_conf_defaults(new_net_conf);
|
|
|
|
err = net_conf_from_attrs_for_change(new_net_conf, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
retcode = check_net_options(connection, new_net_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
/* re-sync running */
|
|
rsr = conn_resync_running(connection);
|
|
if (rsr && strcmp(new_net_conf->csums_alg, old_net_conf->csums_alg)) {
|
|
retcode = ERR_CSUMS_RESYNC_RUNNING;
|
|
goto fail;
|
|
}
|
|
|
|
/* online verify running */
|
|
ovr = conn_ov_running(connection);
|
|
if (ovr && strcmp(new_net_conf->verify_alg, old_net_conf->verify_alg)) {
|
|
retcode = ERR_VERIFY_RUNNING;
|
|
goto fail;
|
|
}
|
|
|
|
retcode = alloc_crypto(&crypto, new_net_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
rcu_assign_pointer(connection->net_conf, new_net_conf);
|
|
|
|
if (!rsr) {
|
|
crypto_free_shash(connection->csums_tfm);
|
|
connection->csums_tfm = crypto.csums_tfm;
|
|
crypto.csums_tfm = NULL;
|
|
}
|
|
if (!ovr) {
|
|
crypto_free_shash(connection->verify_tfm);
|
|
connection->verify_tfm = crypto.verify_tfm;
|
|
crypto.verify_tfm = NULL;
|
|
}
|
|
|
|
crypto_free_shash(connection->integrity_tfm);
|
|
connection->integrity_tfm = crypto.integrity_tfm;
|
|
if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)
|
|
/* Do this without trying to take connection->data.mutex again. */
|
|
__drbd_send_protocol(connection, P_PROTOCOL_UPDATE);
|
|
|
|
crypto_free_shash(connection->cram_hmac_tfm);
|
|
connection->cram_hmac_tfm = crypto.cram_hmac_tfm;
|
|
|
|
mutex_unlock(&connection->resource->conf_update);
|
|
mutex_unlock(&connection->data.mutex);
|
|
kvfree_rcu(old_net_conf);
|
|
|
|
if (connection->cstate >= C_WF_REPORT_PARAMS) {
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
|
|
drbd_send_sync_param(peer_device);
|
|
}
|
|
|
|
goto done;
|
|
|
|
fail:
|
|
mutex_unlock(&connection->resource->conf_update);
|
|
mutex_unlock(&connection->data.mutex);
|
|
free_crypto(&crypto);
|
|
kfree(new_net_conf);
|
|
done:
|
|
conn_reconfig_done(connection);
|
|
out:
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static void connection_to_info(struct connection_info *info,
|
|
struct drbd_connection *connection)
|
|
{
|
|
info->conn_connection_state = connection->cstate;
|
|
info->conn_role = conn_highest_peer(connection);
|
|
}
|
|
|
|
static void peer_device_to_info(struct peer_device_info *info,
|
|
struct drbd_peer_device *peer_device)
|
|
{
|
|
struct drbd_device *device = peer_device->device;
|
|
|
|
info->peer_repl_state =
|
|
max_t(enum drbd_conns, C_WF_REPORT_PARAMS, device->state.conn);
|
|
info->peer_disk_state = device->state.pdsk;
|
|
info->peer_resync_susp_user = device->state.user_isp;
|
|
info->peer_resync_susp_peer = device->state.peer_isp;
|
|
info->peer_resync_susp_dependency = device->state.aftr_isp;
|
|
}
|
|
|
|
int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct connection_info connection_info;
|
|
enum drbd_notification_type flags;
|
|
unsigned int peer_devices = 0;
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_peer_device *peer_device;
|
|
struct net_conf *old_net_conf, *new_net_conf = NULL;
|
|
struct crypto crypto = { };
|
|
struct drbd_resource *resource;
|
|
struct drbd_connection *connection;
|
|
enum drbd_ret_code retcode;
|
|
enum drbd_state_rv rv;
|
|
int i;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "connection endpoint(s) missing");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto out;
|
|
}
|
|
|
|
/* No need for _rcu here. All reconfiguration is
|
|
* strictly serialized on genl_lock(). We are protected against
|
|
* concurrent reconfiguration/addition/deletion */
|
|
for_each_resource(resource, &drbd_resources) {
|
|
for_each_connection(connection, resource) {
|
|
if (nla_len(adm_ctx.my_addr) == connection->my_addr_len &&
|
|
!memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr,
|
|
connection->my_addr_len)) {
|
|
retcode = ERR_LOCAL_ADDR;
|
|
goto out;
|
|
}
|
|
|
|
if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len &&
|
|
!memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr,
|
|
connection->peer_addr_len)) {
|
|
retcode = ERR_PEER_ADDR;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
connection = first_connection(adm_ctx.resource);
|
|
conn_reconfig_start(connection);
|
|
|
|
if (connection->cstate > C_STANDALONE) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
goto fail;
|
|
}
|
|
|
|
/* allocation not in the IO path, drbdsetup / netlink process context */
|
|
new_net_conf = kzalloc(sizeof(*new_net_conf), GFP_KERNEL);
|
|
if (!new_net_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
set_net_conf_defaults(new_net_conf);
|
|
|
|
err = net_conf_from_attrs(new_net_conf, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
retcode = check_net_options(connection, new_net_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
retcode = alloc_crypto(&crypto, new_net_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
((char *)new_net_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
|
|
|
|
drbd_flush_workqueue(&connection->sender_work);
|
|
|
|
mutex_lock(&adm_ctx.resource->conf_update);
|
|
old_net_conf = connection->net_conf;
|
|
if (old_net_conf) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
mutex_unlock(&adm_ctx.resource->conf_update);
|
|
goto fail;
|
|
}
|
|
rcu_assign_pointer(connection->net_conf, new_net_conf);
|
|
|
|
conn_free_crypto(connection);
|
|
connection->cram_hmac_tfm = crypto.cram_hmac_tfm;
|
|
connection->integrity_tfm = crypto.integrity_tfm;
|
|
connection->csums_tfm = crypto.csums_tfm;
|
|
connection->verify_tfm = crypto.verify_tfm;
|
|
|
|
connection->my_addr_len = nla_len(adm_ctx.my_addr);
|
|
memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len);
|
|
connection->peer_addr_len = nla_len(adm_ctx.peer_addr);
|
|
memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len);
|
|
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
peer_devices++;
|
|
}
|
|
|
|
connection_to_info(&connection_info, connection);
|
|
flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
|
|
mutex_lock(¬ification_mutex);
|
|
notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags);
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
struct peer_device_info peer_device_info;
|
|
|
|
peer_device_to_info(&peer_device_info, peer_device);
|
|
flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
|
|
notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, NOTIFY_CREATE | flags);
|
|
}
|
|
mutex_unlock(¬ification_mutex);
|
|
mutex_unlock(&adm_ctx.resource->conf_update);
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
struct drbd_device *device = peer_device->device;
|
|
device->send_cnt = 0;
|
|
device->recv_cnt = 0;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
rv = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);
|
|
|
|
conn_reconfig_done(connection);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
drbd_adm_finish(&adm_ctx, info, rv);
|
|
return 0;
|
|
|
|
fail:
|
|
free_crypto(&crypto);
|
|
kfree(new_net_conf);
|
|
|
|
conn_reconfig_done(connection);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)
|
|
{
|
|
enum drbd_conns cstate;
|
|
enum drbd_state_rv rv;
|
|
|
|
repeat:
|
|
rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),
|
|
force ? CS_HARD : 0);
|
|
|
|
switch (rv) {
|
|
case SS_NOTHING_TO_DO:
|
|
break;
|
|
case SS_ALREADY_STANDALONE:
|
|
return SS_SUCCESS;
|
|
case SS_PRIMARY_NOP:
|
|
/* Our state checking code wants to see the peer outdated. */
|
|
rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);
|
|
|
|
if (rv == SS_OUTDATE_WO_CONN) /* lost connection before graceful disconnect succeeded */
|
|
rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE);
|
|
|
|
break;
|
|
case SS_CW_FAILED_BY_PEER:
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
cstate = connection->cstate;
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
if (cstate <= C_WF_CONNECTION)
|
|
goto repeat;
|
|
/* The peer probably wants to see us outdated. */
|
|
rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,
|
|
disk, D_OUTDATED), 0);
|
|
if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) {
|
|
rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),
|
|
CS_HARD);
|
|
}
|
|
break;
|
|
default:;
|
|
/* no special handling necessary */
|
|
}
|
|
|
|
if (rv >= SS_SUCCESS) {
|
|
enum drbd_state_rv rv2;
|
|
/* No one else can reconfigure the network while I am here.
|
|
* The state handling only uses drbd_thread_stop_nowait(),
|
|
* we want to really wait here until the receiver is no more.
|
|
*/
|
|
drbd_thread_stop(&connection->receiver);
|
|
|
|
/* Race breaker. This additional state change request may be
|
|
* necessary, if this was a forced disconnect during a receiver
|
|
* restart. We may have "killed" the receiver thread just
|
|
* after drbd_receiver() returned. Typically, we should be
|
|
* C_STANDALONE already, now, and this becomes a no-op.
|
|
*/
|
|
rv2 = conn_request_state(connection, NS(conn, C_STANDALONE),
|
|
CS_VERBOSE | CS_HARD);
|
|
if (rv2 < SS_SUCCESS)
|
|
drbd_err(connection,
|
|
"unexpected rv2=%d in conn_try_disconnect()\n",
|
|
rv2);
|
|
/* Unlike in DRBD 9, the state engine has generated
|
|
* NOTIFY_DESTROY events before clearing connection->net_conf. */
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct disconnect_parms parms;
|
|
struct drbd_connection *connection;
|
|
enum drbd_state_rv rv;
|
|
enum drbd_ret_code retcode;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
connection = adm_ctx.connection;
|
|
memset(&parms, 0, sizeof(parms));
|
|
if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) {
|
|
err = disconnect_parms_from_attrs(&parms, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
rv = conn_try_disconnect(connection, parms.force_disconnect);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
if (rv < SS_SUCCESS) {
|
|
drbd_adm_finish(&adm_ctx, info, rv);
|
|
return 0;
|
|
}
|
|
retcode = NO_ERROR;
|
|
fail:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
void resync_after_online_grow(struct drbd_device *device)
|
|
{
|
|
int iass; /* I am sync source */
|
|
|
|
drbd_info(device, "Resync of new storage after online grow\n");
|
|
if (device->state.role != device->state.peer)
|
|
iass = (device->state.role == R_PRIMARY);
|
|
else
|
|
iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);
|
|
|
|
if (iass)
|
|
drbd_start_resync(device, C_SYNC_SOURCE);
|
|
else
|
|
_drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
|
|
}
|
|
|
|
int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
|
|
struct resize_parms rs;
|
|
struct drbd_device *device;
|
|
enum drbd_ret_code retcode;
|
|
enum determine_dev_size dd;
|
|
bool change_al_layout = false;
|
|
enum dds_flags ddsf;
|
|
sector_t u_size;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
device = adm_ctx.device;
|
|
if (!get_ldev(device)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto fail;
|
|
}
|
|
|
|
memset(&rs, 0, sizeof(struct resize_parms));
|
|
rs.al_stripes = device->ldev->md.al_stripes;
|
|
rs.al_stripe_size = device->ldev->md.al_stripe_size_4k * 4;
|
|
if (info->attrs[DRBD_NLA_RESIZE_PARMS]) {
|
|
err = resize_parms_from_attrs(&rs, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail_ldev;
|
|
}
|
|
}
|
|
|
|
if (device->state.conn > C_CONNECTED) {
|
|
retcode = ERR_RESIZE_RESYNC;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
if (device->state.role == R_SECONDARY &&
|
|
device->state.peer == R_SECONDARY) {
|
|
retcode = ERR_NO_PRIMARY;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) {
|
|
retcode = ERR_NEED_APV_93;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
u_size = rcu_dereference(device->ldev->disk_conf)->disk_size;
|
|
rcu_read_unlock();
|
|
if (u_size != (sector_t)rs.resize_size) {
|
|
new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
|
|
if (!new_disk_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail_ldev;
|
|
}
|
|
}
|
|
|
|
if (device->ldev->md.al_stripes != rs.al_stripes ||
|
|
device->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) {
|
|
u32 al_size_k = rs.al_stripes * rs.al_stripe_size;
|
|
|
|
if (al_size_k > (16 * 1024 * 1024)) {
|
|
retcode = ERR_MD_LAYOUT_TOO_BIG;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
if (al_size_k < MD_32kB_SECT/2) {
|
|
retcode = ERR_MD_LAYOUT_TOO_SMALL;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
if (device->state.conn != C_CONNECTED && !rs.resize_force) {
|
|
retcode = ERR_MD_LAYOUT_CONNECTED;
|
|
goto fail_ldev;
|
|
}
|
|
|
|
change_al_layout = true;
|
|
}
|
|
|
|
if (device->ldev->known_size != drbd_get_capacity(device->ldev->backing_bdev))
|
|
device->ldev->known_size = drbd_get_capacity(device->ldev->backing_bdev);
|
|
|
|
if (new_disk_conf) {
|
|
mutex_lock(&device->resource->conf_update);
|
|
old_disk_conf = device->ldev->disk_conf;
|
|
*new_disk_conf = *old_disk_conf;
|
|
new_disk_conf->disk_size = (sector_t)rs.resize_size;
|
|
rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf);
|
|
mutex_unlock(&device->resource->conf_update);
|
|
kvfree_rcu(old_disk_conf);
|
|
new_disk_conf = NULL;
|
|
}
|
|
|
|
ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
|
|
dd = drbd_determine_dev_size(device, ddsf, change_al_layout ? &rs : NULL);
|
|
drbd_md_sync(device);
|
|
put_ldev(device);
|
|
if (dd == DS_ERROR) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto fail;
|
|
} else if (dd == DS_ERROR_SPACE_MD) {
|
|
retcode = ERR_MD_LAYOUT_NO_FIT;
|
|
goto fail;
|
|
} else if (dd == DS_ERROR_SHRINK) {
|
|
retcode = ERR_IMPLICIT_SHRINK;
|
|
goto fail;
|
|
}
|
|
|
|
if (device->state.conn == C_CONNECTED) {
|
|
if (dd == DS_GREW)
|
|
set_bit(RESIZE_PENDING, &device->flags);
|
|
|
|
drbd_send_uuids(first_peer_device(device));
|
|
drbd_send_sizes(first_peer_device(device), 1, ddsf);
|
|
}
|
|
|
|
fail:
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
|
|
fail_ldev:
|
|
put_ldev(device);
|
|
kfree(new_disk_conf);
|
|
goto fail;
|
|
}
|
|
|
|
int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct res_opts res_opts;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
res_opts = adm_ctx.resource->res_opts;
|
|
if (should_set_defaults(info))
|
|
set_res_opts_defaults(&res_opts);
|
|
|
|
err = res_opts_from_attrs(&res_opts, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
err = set_resource_options(adm_ctx.resource, &res_opts);
|
|
if (err) {
|
|
retcode = ERR_INVALID_REQUEST;
|
|
if (err == -ENOMEM)
|
|
retcode = ERR_NOMEM;
|
|
}
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
|
|
fail:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_device *device;
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
device = adm_ctx.device;
|
|
if (!get_ldev(device)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
/* If there is still bitmap IO pending, probably because of a previous
|
|
* resync just being finished, wait for it before requesting a new resync.
|
|
* Also wait for it's after_state_ch(). */
|
|
drbd_suspend_io(device);
|
|
wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
|
|
drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);
|
|
|
|
/* If we happen to be C_STANDALONE R_SECONDARY, just change to
|
|
* D_INCONSISTENT, and set all bits in the bitmap. Otherwise,
|
|
* try to start a resync handshake as sync target for full sync.
|
|
*/
|
|
if (device->state.conn == C_STANDALONE && device->state.role == R_SECONDARY) {
|
|
retcode = drbd_request_state(device, NS(disk, D_INCONSISTENT));
|
|
if (retcode >= SS_SUCCESS) {
|
|
if (drbd_bitmap_io(device, &drbd_bmio_set_n_write,
|
|
"set_n_write from invalidate", BM_LOCKED_MASK))
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
} else
|
|
retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T));
|
|
drbd_resume_io(device);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
put_ldev(device);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info,
|
|
union drbd_state mask, union drbd_state val)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
retcode = drbd_request_state(adm_ctx.device, mask, val);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local)
|
|
{
|
|
int rv;
|
|
|
|
rv = drbd_bmio_set_n_write(device);
|
|
drbd_suspend_al(device);
|
|
return rv;
|
|
}
|
|
|
|
int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
int retcode; /* drbd_ret_code, drbd_state_rv */
|
|
struct drbd_device *device;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
device = adm_ctx.device;
|
|
if (!get_ldev(device)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
/* If there is still bitmap IO pending, probably because of a previous
|
|
* resync just being finished, wait for it before requesting a new resync.
|
|
* Also wait for it's after_state_ch(). */
|
|
drbd_suspend_io(device);
|
|
wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
|
|
drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);
|
|
|
|
/* If we happen to be C_STANDALONE R_PRIMARY, just set all bits
|
|
* in the bitmap. Otherwise, try to start a resync handshake
|
|
* as sync source for full sync.
|
|
*/
|
|
if (device->state.conn == C_STANDALONE && device->state.role == R_PRIMARY) {
|
|
/* The peer will get a resync upon connect anyways. Just make that
|
|
into a full resync. */
|
|
retcode = drbd_request_state(device, NS(pdsk, D_INCONSISTENT));
|
|
if (retcode >= SS_SUCCESS) {
|
|
if (drbd_bitmap_io(device, &drbd_bmio_set_susp_al,
|
|
"set_n_write from invalidate_peer",
|
|
BM_LOCKED_SET_ALLOWED))
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
} else
|
|
retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S));
|
|
drbd_resume_io(device);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
put_ldev(device);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
if (drbd_request_state(adm_ctx.device, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
|
|
retcode = ERR_PAUSE_IS_SET;
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
union drbd_dev_state s;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
if (drbd_request_state(adm_ctx.device, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
|
|
s = adm_ctx.device->state;
|
|
if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
|
|
retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
|
|
s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
|
|
} else {
|
|
retcode = ERR_PAUSE_IS_CLEAR;
|
|
}
|
|
}
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
return drbd_adm_simple_request_state(skb, info, NS(susp, 1));
|
|
}
|
|
|
|
int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_device *device;
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
device = adm_ctx.device;
|
|
if (test_bit(NEW_CUR_UUID, &device->flags)) {
|
|
if (get_ldev_if_state(device, D_ATTACHING)) {
|
|
drbd_uuid_new_current(device);
|
|
put_ldev(device);
|
|
} else {
|
|
/* This is effectively a multi-stage "forced down".
|
|
* The NEW_CUR_UUID bit is supposedly only set, if we
|
|
* lost the replication connection, and are configured
|
|
* to freeze IO and wait for some fence-peer handler.
|
|
* So we still don't have a replication connection.
|
|
* And now we don't have a local disk either. After
|
|
* resume, we will fail all pending and new IO, because
|
|
* we don't have any data anymore. Which means we will
|
|
* eventually be able to terminate all users of this
|
|
* device, and then take it down. By bumping the
|
|
* "effective" data uuid, we make sure that you really
|
|
* need to tear down before you reconfigure, we will
|
|
* the refuse to re-connect or re-attach (because no
|
|
* matching real data uuid exists).
|
|
*/
|
|
u64 val;
|
|
get_random_bytes(&val, sizeof(u64));
|
|
drbd_set_ed_uuid(device, val);
|
|
drbd_warn(device, "Resumed without access to data; please tear down before attempting to re-configure.\n");
|
|
}
|
|
clear_bit(NEW_CUR_UUID, &device->flags);
|
|
}
|
|
drbd_suspend_io(device);
|
|
retcode = drbd_request_state(device, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
|
|
if (retcode == SS_SUCCESS) {
|
|
if (device->state.conn < C_CONNECTED)
|
|
tl_clear(first_peer_device(device)->connection);
|
|
if (device->state.disk == D_DISKLESS || device->state.disk == D_FAILED)
|
|
tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO);
|
|
}
|
|
drbd_resume_io(device);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED));
|
|
}
|
|
|
|
static int nla_put_drbd_cfg_context(struct sk_buff *skb,
|
|
struct drbd_resource *resource,
|
|
struct drbd_connection *connection,
|
|
struct drbd_device *device)
|
|
{
|
|
struct nlattr *nla;
|
|
nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_CONTEXT);
|
|
if (!nla)
|
|
goto nla_put_failure;
|
|
if (device &&
|
|
nla_put_u32(skb, T_ctx_volume, device->vnr))
|
|
goto nla_put_failure;
|
|
if (nla_put_string(skb, T_ctx_resource_name, resource->name))
|
|
goto nla_put_failure;
|
|
if (connection) {
|
|
if (connection->my_addr_len &&
|
|
nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr))
|
|
goto nla_put_failure;
|
|
if (connection->peer_addr_len &&
|
|
nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr))
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, nla);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
if (nla)
|
|
nla_nest_cancel(skb, nla);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
/*
|
|
* The generic netlink dump callbacks are called outside the genl_lock(), so
|
|
* they cannot use the simple attribute parsing code which uses global
|
|
* attribute tables.
|
|
*/
|
|
static struct nlattr *find_cfg_context_attr(const struct nlmsghdr *nlh, int attr)
|
|
{
|
|
const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
|
|
const int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1;
|
|
struct nlattr *nla;
|
|
|
|
nla = nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen),
|
|
DRBD_NLA_CFG_CONTEXT);
|
|
if (!nla)
|
|
return NULL;
|
|
return drbd_nla_find_nested(maxtype, nla, __nla_type(attr));
|
|
}
|
|
|
|
static void resource_to_info(struct resource_info *, struct drbd_resource *);
|
|
|
|
int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct drbd_genlmsghdr *dh;
|
|
struct drbd_resource *resource;
|
|
struct resource_info resource_info;
|
|
struct resource_statistics resource_statistics;
|
|
int err;
|
|
|
|
rcu_read_lock();
|
|
if (cb->args[0]) {
|
|
for_each_resource_rcu(resource, &drbd_resources)
|
|
if (resource == (struct drbd_resource *)cb->args[0])
|
|
goto found_resource;
|
|
err = 0; /* resource was probably deleted */
|
|
goto out;
|
|
}
|
|
resource = list_entry(&drbd_resources,
|
|
struct drbd_resource, resources);
|
|
|
|
found_resource:
|
|
list_for_each_entry_continue_rcu(resource, &drbd_resources, resources) {
|
|
goto put_result;
|
|
}
|
|
err = 0;
|
|
goto out;
|
|
|
|
put_result:
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_RESOURCES);
|
|
err = -ENOMEM;
|
|
if (!dh)
|
|
goto out;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
err = nla_put_drbd_cfg_context(skb, resource, NULL, NULL);
|
|
if (err)
|
|
goto out;
|
|
err = res_opts_to_skb(skb, &resource->res_opts, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
resource_to_info(&resource_info, resource);
|
|
err = resource_info_to_skb(skb, &resource_info, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
resource_statistics.res_stat_write_ordering = resource->write_ordering;
|
|
err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
cb->args[0] = (long)resource;
|
|
genlmsg_end(skb, dh);
|
|
err = 0;
|
|
|
|
out:
|
|
rcu_read_unlock();
|
|
if (err)
|
|
return err;
|
|
return skb->len;
|
|
}
|
|
|
|
static void device_to_statistics(struct device_statistics *s,
|
|
struct drbd_device *device)
|
|
{
|
|
memset(s, 0, sizeof(*s));
|
|
s->dev_upper_blocked = !may_inc_ap_bio(device);
|
|
if (get_ldev(device)) {
|
|
struct drbd_md *md = &device->ldev->md;
|
|
u64 *history_uuids = (u64 *)s->history_uuids;
|
|
int n;
|
|
|
|
spin_lock_irq(&md->uuid_lock);
|
|
s->dev_current_uuid = md->uuid[UI_CURRENT];
|
|
BUILD_BUG_ON(sizeof(s->history_uuids) < UI_HISTORY_END - UI_HISTORY_START + 1);
|
|
for (n = 0; n < UI_HISTORY_END - UI_HISTORY_START + 1; n++)
|
|
history_uuids[n] = md->uuid[UI_HISTORY_START + n];
|
|
for (; n < HISTORY_UUIDS; n++)
|
|
history_uuids[n] = 0;
|
|
s->history_uuids_len = HISTORY_UUIDS;
|
|
spin_unlock_irq(&md->uuid_lock);
|
|
|
|
s->dev_disk_flags = md->flags;
|
|
put_ldev(device);
|
|
}
|
|
s->dev_size = get_capacity(device->vdisk);
|
|
s->dev_read = device->read_cnt;
|
|
s->dev_write = device->writ_cnt;
|
|
s->dev_al_writes = device->al_writ_cnt;
|
|
s->dev_bm_writes = device->bm_writ_cnt;
|
|
s->dev_upper_pending = atomic_read(&device->ap_bio_cnt);
|
|
s->dev_lower_pending = atomic_read(&device->local_cnt);
|
|
s->dev_al_suspended = test_bit(AL_SUSPENDED, &device->flags);
|
|
s->dev_exposed_data_uuid = device->ed_uuid;
|
|
}
|
|
|
|
static int put_resource_in_arg0(struct netlink_callback *cb, int holder_nr)
|
|
{
|
|
if (cb->args[0]) {
|
|
struct drbd_resource *resource =
|
|
(struct drbd_resource *)cb->args[0];
|
|
kref_put(&resource->kref, drbd_destroy_resource);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_dump_devices_done(struct netlink_callback *cb) {
|
|
return put_resource_in_arg0(cb, 7);
|
|
}
|
|
|
|
static void device_to_info(struct device_info *, struct drbd_device *);
|
|
|
|
int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *resource_filter;
|
|
struct drbd_resource *resource;
|
|
struct drbd_device *device;
|
|
int minor, err, retcode;
|
|
struct drbd_genlmsghdr *dh;
|
|
struct device_info device_info;
|
|
struct device_statistics device_statistics;
|
|
struct idr *idr_to_search;
|
|
|
|
resource = (struct drbd_resource *)cb->args[0];
|
|
if (!cb->args[0] && !cb->args[1]) {
|
|
resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
|
|
if (resource_filter) {
|
|
retcode = ERR_RES_NOT_KNOWN;
|
|
resource = drbd_find_resource(nla_data(resource_filter));
|
|
if (!resource)
|
|
goto put_result;
|
|
cb->args[0] = (long)resource;
|
|
}
|
|
}
|
|
|
|
rcu_read_lock();
|
|
minor = cb->args[1];
|
|
idr_to_search = resource ? &resource->devices : &drbd_devices;
|
|
device = idr_get_next(idr_to_search, &minor);
|
|
if (!device) {
|
|
err = 0;
|
|
goto out;
|
|
}
|
|
idr_for_each_entry_continue(idr_to_search, device, minor) {
|
|
retcode = NO_ERROR;
|
|
goto put_result; /* only one iteration */
|
|
}
|
|
err = 0;
|
|
goto out; /* no more devices */
|
|
|
|
put_result:
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_DEVICES);
|
|
err = -ENOMEM;
|
|
if (!dh)
|
|
goto out;
|
|
dh->ret_code = retcode;
|
|
dh->minor = -1U;
|
|
if (retcode == NO_ERROR) {
|
|
dh->minor = device->minor;
|
|
err = nla_put_drbd_cfg_context(skb, device->resource, NULL, device);
|
|
if (err)
|
|
goto out;
|
|
if (get_ldev(device)) {
|
|
struct disk_conf *disk_conf =
|
|
rcu_dereference(device->ldev->disk_conf);
|
|
|
|
err = disk_conf_to_skb(skb, disk_conf, !capable(CAP_SYS_ADMIN));
|
|
put_ldev(device);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
device_to_info(&device_info, device);
|
|
err = device_info_to_skb(skb, &device_info, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
|
|
device_to_statistics(&device_statistics, device);
|
|
err = device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
cb->args[1] = minor + 1;
|
|
}
|
|
genlmsg_end(skb, dh);
|
|
err = 0;
|
|
|
|
out:
|
|
rcu_read_unlock();
|
|
if (err)
|
|
return err;
|
|
return skb->len;
|
|
}
|
|
|
|
int drbd_adm_dump_connections_done(struct netlink_callback *cb)
|
|
{
|
|
return put_resource_in_arg0(cb, 6);
|
|
}
|
|
|
|
enum { SINGLE_RESOURCE, ITERATE_RESOURCES };
|
|
|
|
int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *resource_filter;
|
|
struct drbd_resource *resource = NULL, *next_resource;
|
|
struct drbd_connection *connection;
|
|
int err = 0, retcode;
|
|
struct drbd_genlmsghdr *dh;
|
|
struct connection_info connection_info;
|
|
struct connection_statistics connection_statistics;
|
|
|
|
rcu_read_lock();
|
|
resource = (struct drbd_resource *)cb->args[0];
|
|
if (!cb->args[0]) {
|
|
resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
|
|
if (resource_filter) {
|
|
retcode = ERR_RES_NOT_KNOWN;
|
|
resource = drbd_find_resource(nla_data(resource_filter));
|
|
if (!resource)
|
|
goto put_result;
|
|
cb->args[0] = (long)resource;
|
|
cb->args[1] = SINGLE_RESOURCE;
|
|
}
|
|
}
|
|
if (!resource) {
|
|
if (list_empty(&drbd_resources))
|
|
goto out;
|
|
resource = list_first_entry(&drbd_resources, struct drbd_resource, resources);
|
|
kref_get(&resource->kref);
|
|
cb->args[0] = (long)resource;
|
|
cb->args[1] = ITERATE_RESOURCES;
|
|
}
|
|
|
|
next_resource:
|
|
rcu_read_unlock();
|
|
mutex_lock(&resource->conf_update);
|
|
rcu_read_lock();
|
|
if (cb->args[2]) {
|
|
for_each_connection_rcu(connection, resource)
|
|
if (connection == (struct drbd_connection *)cb->args[2])
|
|
goto found_connection;
|
|
/* connection was probably deleted */
|
|
goto no_more_connections;
|
|
}
|
|
connection = list_entry(&resource->connections, struct drbd_connection, connections);
|
|
|
|
found_connection:
|
|
list_for_each_entry_continue_rcu(connection, &resource->connections, connections) {
|
|
if (!has_net_conf(connection))
|
|
continue;
|
|
retcode = NO_ERROR;
|
|
goto put_result; /* only one iteration */
|
|
}
|
|
|
|
no_more_connections:
|
|
if (cb->args[1] == ITERATE_RESOURCES) {
|
|
for_each_resource_rcu(next_resource, &drbd_resources) {
|
|
if (next_resource == resource)
|
|
goto found_resource;
|
|
}
|
|
/* resource was probably deleted */
|
|
}
|
|
goto out;
|
|
|
|
found_resource:
|
|
list_for_each_entry_continue_rcu(next_resource, &drbd_resources, resources) {
|
|
mutex_unlock(&resource->conf_update);
|
|
kref_put(&resource->kref, drbd_destroy_resource);
|
|
resource = next_resource;
|
|
kref_get(&resource->kref);
|
|
cb->args[0] = (long)resource;
|
|
cb->args[2] = 0;
|
|
goto next_resource;
|
|
}
|
|
goto out; /* no more resources */
|
|
|
|
put_result:
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_CONNECTIONS);
|
|
err = -ENOMEM;
|
|
if (!dh)
|
|
goto out;
|
|
dh->ret_code = retcode;
|
|
dh->minor = -1U;
|
|
if (retcode == NO_ERROR) {
|
|
struct net_conf *net_conf;
|
|
|
|
err = nla_put_drbd_cfg_context(skb, resource, connection, NULL);
|
|
if (err)
|
|
goto out;
|
|
net_conf = rcu_dereference(connection->net_conf);
|
|
if (net_conf) {
|
|
err = net_conf_to_skb(skb, net_conf, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
}
|
|
connection_to_info(&connection_info, connection);
|
|
err = connection_info_to_skb(skb, &connection_info, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);
|
|
err = connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
cb->args[2] = (long)connection;
|
|
}
|
|
genlmsg_end(skb, dh);
|
|
err = 0;
|
|
|
|
out:
|
|
rcu_read_unlock();
|
|
if (resource)
|
|
mutex_unlock(&resource->conf_update);
|
|
if (err)
|
|
return err;
|
|
return skb->len;
|
|
}
|
|
|
|
enum mdf_peer_flag {
|
|
MDF_PEER_CONNECTED = 1 << 0,
|
|
MDF_PEER_OUTDATED = 1 << 1,
|
|
MDF_PEER_FENCING = 1 << 2,
|
|
MDF_PEER_FULL_SYNC = 1 << 3,
|
|
};
|
|
|
|
static void peer_device_to_statistics(struct peer_device_statistics *s,
|
|
struct drbd_peer_device *peer_device)
|
|
{
|
|
struct drbd_device *device = peer_device->device;
|
|
|
|
memset(s, 0, sizeof(*s));
|
|
s->peer_dev_received = device->recv_cnt;
|
|
s->peer_dev_sent = device->send_cnt;
|
|
s->peer_dev_pending = atomic_read(&device->ap_pending_cnt) +
|
|
atomic_read(&device->rs_pending_cnt);
|
|
s->peer_dev_unacked = atomic_read(&device->unacked_cnt);
|
|
s->peer_dev_out_of_sync = drbd_bm_total_weight(device) << (BM_BLOCK_SHIFT - 9);
|
|
s->peer_dev_resync_failed = device->rs_failed << (BM_BLOCK_SHIFT - 9);
|
|
if (get_ldev(device)) {
|
|
struct drbd_md *md = &device->ldev->md;
|
|
|
|
spin_lock_irq(&md->uuid_lock);
|
|
s->peer_dev_bitmap_uuid = md->uuid[UI_BITMAP];
|
|
spin_unlock_irq(&md->uuid_lock);
|
|
s->peer_dev_flags =
|
|
(drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND) ?
|
|
MDF_PEER_CONNECTED : 0) +
|
|
(drbd_md_test_flag(device->ldev, MDF_CONSISTENT) &&
|
|
!drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE) ?
|
|
MDF_PEER_OUTDATED : 0) +
|
|
/* FIXME: MDF_PEER_FENCING? */
|
|
(drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ?
|
|
MDF_PEER_FULL_SYNC : 0);
|
|
put_ldev(device);
|
|
}
|
|
}
|
|
|
|
int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb)
|
|
{
|
|
return put_resource_in_arg0(cb, 9);
|
|
}
|
|
|
|
int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *resource_filter;
|
|
struct drbd_resource *resource;
|
|
struct drbd_device *device;
|
|
struct drbd_peer_device *peer_device = NULL;
|
|
int minor, err, retcode;
|
|
struct drbd_genlmsghdr *dh;
|
|
struct idr *idr_to_search;
|
|
|
|
resource = (struct drbd_resource *)cb->args[0];
|
|
if (!cb->args[0] && !cb->args[1]) {
|
|
resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
|
|
if (resource_filter) {
|
|
retcode = ERR_RES_NOT_KNOWN;
|
|
resource = drbd_find_resource(nla_data(resource_filter));
|
|
if (!resource)
|
|
goto put_result;
|
|
}
|
|
cb->args[0] = (long)resource;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
minor = cb->args[1];
|
|
idr_to_search = resource ? &resource->devices : &drbd_devices;
|
|
device = idr_find(idr_to_search, minor);
|
|
if (!device) {
|
|
next_device:
|
|
minor++;
|
|
cb->args[2] = 0;
|
|
device = idr_get_next(idr_to_search, &minor);
|
|
if (!device) {
|
|
err = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
if (cb->args[2]) {
|
|
for_each_peer_device(peer_device, device)
|
|
if (peer_device == (struct drbd_peer_device *)cb->args[2])
|
|
goto found_peer_device;
|
|
/* peer device was probably deleted */
|
|
goto next_device;
|
|
}
|
|
/* Make peer_device point to the list head (not the first entry). */
|
|
peer_device = list_entry(&device->peer_devices, struct drbd_peer_device, peer_devices);
|
|
|
|
found_peer_device:
|
|
list_for_each_entry_continue_rcu(peer_device, &device->peer_devices, peer_devices) {
|
|
if (!has_net_conf(peer_device->connection))
|
|
continue;
|
|
retcode = NO_ERROR;
|
|
goto put_result; /* only one iteration */
|
|
}
|
|
goto next_device;
|
|
|
|
put_result:
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_PEER_DEVICES);
|
|
err = -ENOMEM;
|
|
if (!dh)
|
|
goto out;
|
|
dh->ret_code = retcode;
|
|
dh->minor = -1U;
|
|
if (retcode == NO_ERROR) {
|
|
struct peer_device_info peer_device_info;
|
|
struct peer_device_statistics peer_device_statistics;
|
|
|
|
dh->minor = minor;
|
|
err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device);
|
|
if (err)
|
|
goto out;
|
|
peer_device_to_info(&peer_device_info, peer_device);
|
|
err = peer_device_info_to_skb(skb, &peer_device_info, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
peer_device_to_statistics(&peer_device_statistics, peer_device);
|
|
err = peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto out;
|
|
cb->args[1] = minor;
|
|
cb->args[2] = (long)peer_device;
|
|
}
|
|
genlmsg_end(skb, dh);
|
|
err = 0;
|
|
|
|
out:
|
|
rcu_read_unlock();
|
|
if (err)
|
|
return err;
|
|
return skb->len;
|
|
}
|
|
/*
|
|
* Return the connection of @resource if @resource has exactly one connection.
|
|
*/
|
|
static struct drbd_connection *the_only_connection(struct drbd_resource *resource)
|
|
{
|
|
struct list_head *connections = &resource->connections;
|
|
|
|
if (list_empty(connections) || connections->next->next != connections)
|
|
return NULL;
|
|
return list_first_entry(&resource->connections, struct drbd_connection, connections);
|
|
}
|
|
|
|
static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device,
|
|
const struct sib_info *sib)
|
|
{
|
|
struct drbd_resource *resource = device->resource;
|
|
struct state_info *si = NULL; /* for sizeof(si->member); */
|
|
struct nlattr *nla;
|
|
int got_ldev;
|
|
int err = 0;
|
|
int exclude_sensitive;
|
|
|
|
/* If sib != NULL, this is drbd_bcast_event, which anyone can listen
|
|
* to. So we better exclude_sensitive information.
|
|
*
|
|
* If sib == NULL, this is drbd_adm_get_status, executed synchronously
|
|
* in the context of the requesting user process. Exclude sensitive
|
|
* information, unless current has superuser.
|
|
*
|
|
* NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and
|
|
* relies on the current implementation of netlink_dump(), which
|
|
* executes the dump callback successively from netlink_recvmsg(),
|
|
* always in the context of the receiving process */
|
|
exclude_sensitive = sib || !capable(CAP_SYS_ADMIN);
|
|
|
|
got_ldev = get_ldev(device);
|
|
|
|
/* We need to add connection name and volume number information still.
|
|
* Minor number is in drbd_genlmsghdr. */
|
|
if (nla_put_drbd_cfg_context(skb, resource, the_only_connection(resource), device))
|
|
goto nla_put_failure;
|
|
|
|
if (res_opts_to_skb(skb, &device->resource->res_opts, exclude_sensitive))
|
|
goto nla_put_failure;
|
|
|
|
rcu_read_lock();
|
|
if (got_ldev) {
|
|
struct disk_conf *disk_conf;
|
|
|
|
disk_conf = rcu_dereference(device->ldev->disk_conf);
|
|
err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive);
|
|
}
|
|
if (!err) {
|
|
struct net_conf *nc;
|
|
|
|
nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
|
|
if (nc)
|
|
err = net_conf_to_skb(skb, nc, exclude_sensitive);
|
|
}
|
|
rcu_read_unlock();
|
|
if (err)
|
|
goto nla_put_failure;
|
|
|
|
nla = nla_nest_start_noflag(skb, DRBD_NLA_STATE_INFO);
|
|
if (!nla)
|
|
goto nla_put_failure;
|
|
if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) ||
|
|
nla_put_u32(skb, T_current_state, device->state.i) ||
|
|
nla_put_u64_0pad(skb, T_ed_uuid, device->ed_uuid) ||
|
|
nla_put_u64_0pad(skb, T_capacity, get_capacity(device->vdisk)) ||
|
|
nla_put_u64_0pad(skb, T_send_cnt, device->send_cnt) ||
|
|
nla_put_u64_0pad(skb, T_recv_cnt, device->recv_cnt) ||
|
|
nla_put_u64_0pad(skb, T_read_cnt, device->read_cnt) ||
|
|
nla_put_u64_0pad(skb, T_writ_cnt, device->writ_cnt) ||
|
|
nla_put_u64_0pad(skb, T_al_writ_cnt, device->al_writ_cnt) ||
|
|
nla_put_u64_0pad(skb, T_bm_writ_cnt, device->bm_writ_cnt) ||
|
|
nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) ||
|
|
nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&device->ap_pending_cnt)) ||
|
|
nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&device->rs_pending_cnt)))
|
|
goto nla_put_failure;
|
|
|
|
if (got_ldev) {
|
|
int err;
|
|
|
|
spin_lock_irq(&device->ldev->md.uuid_lock);
|
|
err = nla_put(skb, T_uuids, sizeof(si->uuids), device->ldev->md.uuid);
|
|
spin_unlock_irq(&device->ldev->md.uuid_lock);
|
|
|
|
if (err)
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) ||
|
|
nla_put_u64_0pad(skb, T_bits_total, drbd_bm_bits(device)) ||
|
|
nla_put_u64_0pad(skb, T_bits_oos,
|
|
drbd_bm_total_weight(device)))
|
|
goto nla_put_failure;
|
|
if (C_SYNC_SOURCE <= device->state.conn &&
|
|
C_PAUSED_SYNC_T >= device->state.conn) {
|
|
if (nla_put_u64_0pad(skb, T_bits_rs_total,
|
|
device->rs_total) ||
|
|
nla_put_u64_0pad(skb, T_bits_rs_failed,
|
|
device->rs_failed))
|
|
goto nla_put_failure;
|
|
}
|
|
}
|
|
|
|
if (sib) {
|
|
switch(sib->sib_reason) {
|
|
case SIB_SYNC_PROGRESS:
|
|
case SIB_GET_STATUS_REPLY:
|
|
break;
|
|
case SIB_STATE_CHANGE:
|
|
if (nla_put_u32(skb, T_prev_state, sib->os.i) ||
|
|
nla_put_u32(skb, T_new_state, sib->ns.i))
|
|
goto nla_put_failure;
|
|
break;
|
|
case SIB_HELPER_POST:
|
|
if (nla_put_u32(skb, T_helper_exit_code,
|
|
sib->helper_exit_code))
|
|
goto nla_put_failure;
|
|
fallthrough;
|
|
case SIB_HELPER_PRE:
|
|
if (nla_put_string(skb, T_helper, sib->helper_name))
|
|
goto nla_put_failure;
|
|
break;
|
|
}
|
|
}
|
|
nla_nest_end(skb, nla);
|
|
|
|
if (0)
|
|
nla_put_failure:
|
|
err = -EMSGSIZE;
|
|
if (got_ldev)
|
|
put_ldev(device);
|
|
return err;
|
|
}
|
|
|
|
int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.device, NULL);
|
|
if (err) {
|
|
nlmsg_free(adm_ctx.reply_skb);
|
|
return err;
|
|
}
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct drbd_device *device;
|
|
struct drbd_genlmsghdr *dh;
|
|
struct drbd_resource *pos = (struct drbd_resource *)cb->args[0];
|
|
struct drbd_resource *resource = NULL;
|
|
struct drbd_resource *tmp;
|
|
unsigned volume = cb->args[1];
|
|
|
|
/* Open coded, deferred, iteration:
|
|
* for_each_resource_safe(resource, tmp, &drbd_resources) {
|
|
* connection = "first connection of resource or undefined";
|
|
* idr_for_each_entry(&resource->devices, device, i) {
|
|
* ...
|
|
* }
|
|
* }
|
|
* where resource is cb->args[0];
|
|
* and i is cb->args[1];
|
|
*
|
|
* cb->args[2] indicates if we shall loop over all resources,
|
|
* or just dump all volumes of a single resource.
|
|
*
|
|
* This may miss entries inserted after this dump started,
|
|
* or entries deleted before they are reached.
|
|
*
|
|
* We need to make sure the device won't disappear while
|
|
* we are looking at it, and revalidate our iterators
|
|
* on each iteration.
|
|
*/
|
|
|
|
/* synchronize with conn_create()/drbd_destroy_connection() */
|
|
rcu_read_lock();
|
|
/* revalidate iterator position */
|
|
for_each_resource_rcu(tmp, &drbd_resources) {
|
|
if (pos == NULL) {
|
|
/* first iteration */
|
|
pos = tmp;
|
|
resource = pos;
|
|
break;
|
|
}
|
|
if (tmp == pos) {
|
|
resource = pos;
|
|
break;
|
|
}
|
|
}
|
|
if (resource) {
|
|
next_resource:
|
|
device = idr_get_next(&resource->devices, &volume);
|
|
if (!device) {
|
|
/* No more volumes to dump on this resource.
|
|
* Advance resource iterator. */
|
|
pos = list_entry_rcu(resource->resources.next,
|
|
struct drbd_resource, resources);
|
|
/* Did we dump any volume of this resource yet? */
|
|
if (volume != 0) {
|
|
/* If we reached the end of the list,
|
|
* or only a single resource dump was requested,
|
|
* we are done. */
|
|
if (&pos->resources == &drbd_resources || cb->args[2])
|
|
goto out;
|
|
volume = 0;
|
|
resource = pos;
|
|
goto next_resource;
|
|
}
|
|
}
|
|
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_STATUS);
|
|
if (!dh)
|
|
goto out;
|
|
|
|
if (!device) {
|
|
/* This is a connection without a single volume.
|
|
* Suprisingly enough, it may have a network
|
|
* configuration. */
|
|
struct drbd_connection *connection;
|
|
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
connection = the_only_connection(resource);
|
|
if (nla_put_drbd_cfg_context(skb, resource, connection, NULL))
|
|
goto cancel;
|
|
if (connection) {
|
|
struct net_conf *nc;
|
|
|
|
nc = rcu_dereference(connection->net_conf);
|
|
if (nc && net_conf_to_skb(skb, nc, 1) != 0)
|
|
goto cancel;
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
D_ASSERT(device, device->vnr == volume);
|
|
D_ASSERT(device, device->resource == resource);
|
|
|
|
dh->minor = device_to_minor(device);
|
|
dh->ret_code = NO_ERROR;
|
|
|
|
if (nla_put_status_info(skb, device, NULL)) {
|
|
cancel:
|
|
genlmsg_cancel(skb, dh);
|
|
goto out;
|
|
}
|
|
done:
|
|
genlmsg_end(skb, dh);
|
|
}
|
|
|
|
out:
|
|
rcu_read_unlock();
|
|
/* where to start the next iteration */
|
|
cb->args[0] = (long)pos;
|
|
cb->args[1] = (pos == resource) ? volume + 1 : 0;
|
|
|
|
/* No more resources/volumes/minors found results in an empty skb.
|
|
* Which will terminate the dump. */
|
|
return skb->len;
|
|
}
|
|
|
|
/*
|
|
* Request status of all resources, or of all volumes within a single resource.
|
|
*
|
|
* This is a dump, as the answer may not fit in a single reply skb otherwise.
|
|
* Which means we cannot use the family->attrbuf or other such members, because
|
|
* dump is NOT protected by the genl_lock(). During dump, we only have access
|
|
* to the incoming skb, and need to opencode "parsing" of the nlattr payload.
|
|
*
|
|
* Once things are setup properly, we call into get_one_status().
|
|
*/
|
|
int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
|
|
struct nlattr *nla;
|
|
const char *resource_name;
|
|
struct drbd_resource *resource;
|
|
int maxtype;
|
|
|
|
/* Is this a followup call? */
|
|
if (cb->args[0]) {
|
|
/* ... of a single resource dump,
|
|
* and the resource iterator has been advanced already? */
|
|
if (cb->args[2] && cb->args[2] != cb->args[0])
|
|
return 0; /* DONE. */
|
|
goto dump;
|
|
}
|
|
|
|
/* First call (from netlink_dump_start). We need to figure out
|
|
* which resource(s) the user wants us to dump. */
|
|
nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen),
|
|
nlmsg_attrlen(cb->nlh, hdrlen),
|
|
DRBD_NLA_CFG_CONTEXT);
|
|
|
|
/* No explicit context given. Dump all. */
|
|
if (!nla)
|
|
goto dump;
|
|
maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1;
|
|
nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name));
|
|
if (IS_ERR(nla))
|
|
return PTR_ERR(nla);
|
|
/* context given, but no name present? */
|
|
if (!nla)
|
|
return -EINVAL;
|
|
resource_name = nla_data(nla);
|
|
if (!*resource_name)
|
|
return -ENODEV;
|
|
resource = drbd_find_resource(resource_name);
|
|
if (!resource)
|
|
return -ENODEV;
|
|
|
|
kref_put(&resource->kref, drbd_destroy_resource); /* get_one_status() revalidates the resource */
|
|
|
|
/* prime iterators, and set "filter" mode mark:
|
|
* only dump this connection. */
|
|
cb->args[0] = (long)resource;
|
|
/* cb->args[1] = 0; passed in this way. */
|
|
cb->args[2] = (long)resource;
|
|
|
|
dump:
|
|
return get_one_status(skb, cb);
|
|
}
|
|
|
|
int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct timeout_parms tp;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
tp.timeout_type =
|
|
adm_ctx.device->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
|
|
test_bit(USE_DEGR_WFC_T, &adm_ctx.device->flags) ? UT_DEGRADED :
|
|
UT_DEFAULT;
|
|
|
|
err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp);
|
|
if (err) {
|
|
nlmsg_free(adm_ctx.reply_skb);
|
|
return err;
|
|
}
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_device *device;
|
|
enum drbd_ret_code retcode;
|
|
struct start_ov_parms parms;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
device = adm_ctx.device;
|
|
|
|
/* resume from last known position, if possible */
|
|
parms.ov_start_sector = device->ov_start_sector;
|
|
parms.ov_stop_sector = ULLONG_MAX;
|
|
if (info->attrs[DRBD_NLA_START_OV_PARMS]) {
|
|
int err = start_ov_parms_from_attrs(&parms, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
}
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
|
|
/* w_make_ov_request expects position to be aligned */
|
|
device->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1);
|
|
device->ov_stop_sector = parms.ov_stop_sector;
|
|
|
|
/* If there is still bitmap IO pending, e.g. previous resync or verify
|
|
* just being finished, wait for it before requesting a new resync. */
|
|
drbd_suspend_io(device);
|
|
wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
|
|
retcode = drbd_request_state(device, NS(conn, C_VERIFY_S));
|
|
drbd_resume_io(device);
|
|
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_device *device;
|
|
enum drbd_ret_code retcode;
|
|
int skip_initial_sync = 0;
|
|
int err;
|
|
struct new_c_uuid_parms args;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out_nolock;
|
|
|
|
device = adm_ctx.device;
|
|
memset(&args, 0, sizeof(args));
|
|
if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) {
|
|
err = new_c_uuid_parms_from_attrs(&args, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto out_nolock;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
mutex_lock(device->state_mutex); /* Protects us against serialized state changes. */
|
|
|
|
if (!get_ldev(device)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
/* this is "skip initial sync", assume to be clean */
|
|
if (device->state.conn == C_CONNECTED &&
|
|
first_peer_device(device)->connection->agreed_pro_version >= 90 &&
|
|
device->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
|
|
drbd_info(device, "Preparing to skip initial sync\n");
|
|
skip_initial_sync = 1;
|
|
} else if (device->state.conn != C_STANDALONE) {
|
|
retcode = ERR_CONNECTED;
|
|
goto out_dec;
|
|
}
|
|
|
|
drbd_uuid_set(device, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */
|
|
drbd_uuid_new_current(device); /* New current, previous to UI_BITMAP */
|
|
|
|
if (args.clear_bm) {
|
|
err = drbd_bitmap_io(device, &drbd_bmio_clear_n_write,
|
|
"clear_n_write from new_c_uuid", BM_LOCKED_MASK);
|
|
if (err) {
|
|
drbd_err(device, "Writing bitmap failed with %d\n", err);
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
if (skip_initial_sync) {
|
|
drbd_send_uuids_skip_initial_sync(first_peer_device(device));
|
|
_drbd_uuid_set(device, UI_BITMAP, 0);
|
|
drbd_print_uuids(device, "cleared bitmap UUID");
|
|
spin_lock_irq(&device->resource->req_lock);
|
|
_drbd_set_state(_NS2(device, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
|
|
CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&device->resource->req_lock);
|
|
}
|
|
}
|
|
|
|
drbd_md_sync(device);
|
|
out_dec:
|
|
put_ldev(device);
|
|
out:
|
|
mutex_unlock(device->state_mutex);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out_nolock:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
drbd_check_resource_name(struct drbd_config_context *adm_ctx)
|
|
{
|
|
const char *name = adm_ctx->resource_name;
|
|
if (!name || !name[0]) {
|
|
drbd_msg_put_info(adm_ctx->reply_skb, "resource name missing");
|
|
return ERR_MANDATORY_TAG;
|
|
}
|
|
/* if we want to use these in sysfs/configfs/debugfs some day,
|
|
* we must not allow slashes */
|
|
if (strchr(name, '/')) {
|
|
drbd_msg_put_info(adm_ctx->reply_skb, "invalid resource name");
|
|
return ERR_INVALID_REQUEST;
|
|
}
|
|
return NO_ERROR;
|
|
}
|
|
|
|
static void resource_to_info(struct resource_info *info,
|
|
struct drbd_resource *resource)
|
|
{
|
|
info->res_role = conn_highest_role(first_connection(resource));
|
|
info->res_susp = resource->susp;
|
|
info->res_susp_nod = resource->susp_nod;
|
|
info->res_susp_fen = resource->susp_fen;
|
|
}
|
|
|
|
int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_connection *connection;
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
struct res_opts res_opts;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, 0);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
set_res_opts_defaults(&res_opts);
|
|
err = res_opts_from_attrs(&res_opts, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
|
|
retcode = drbd_check_resource_name(&adm_ctx);
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (adm_ctx.resource) {
|
|
if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) {
|
|
retcode = ERR_INVALID_REQUEST;
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "resource exists");
|
|
}
|
|
/* else: still NO_ERROR */
|
|
goto out;
|
|
}
|
|
|
|
/* not yet safe for genl_family.parallel_ops */
|
|
mutex_lock(&resources_mutex);
|
|
connection = conn_create(adm_ctx.resource_name, &res_opts);
|
|
mutex_unlock(&resources_mutex);
|
|
|
|
if (connection) {
|
|
struct resource_info resource_info;
|
|
|
|
mutex_lock(¬ification_mutex);
|
|
resource_to_info(&resource_info, connection->resource);
|
|
notify_resource_state(NULL, 0, connection->resource,
|
|
&resource_info, NOTIFY_CREATE);
|
|
mutex_unlock(¬ification_mutex);
|
|
} else
|
|
retcode = ERR_NOMEM;
|
|
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static void device_to_info(struct device_info *info,
|
|
struct drbd_device *device)
|
|
{
|
|
info->dev_disk_state = device->state.disk;
|
|
}
|
|
|
|
|
|
int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_genlmsghdr *dh = info->userhdr;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (dh->minor > MINORMASK) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "requested minor out of range");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto out;
|
|
}
|
|
if (adm_ctx.volume > DRBD_VOLUME_MAX) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "requested volume id out of range");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto out;
|
|
}
|
|
|
|
/* drbd_adm_prepare made sure already
|
|
* that first_peer_device(device)->connection and device->vnr match the request. */
|
|
if (adm_ctx.device) {
|
|
if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
|
|
retcode = ERR_MINOR_OR_VOLUME_EXISTS;
|
|
/* else: still NO_ERROR */
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
retcode = drbd_create_device(&adm_ctx, dh->minor);
|
|
if (retcode == NO_ERROR) {
|
|
struct drbd_device *device;
|
|
struct drbd_peer_device *peer_device;
|
|
struct device_info info;
|
|
unsigned int peer_devices = 0;
|
|
enum drbd_notification_type flags;
|
|
|
|
device = minor_to_device(dh->minor);
|
|
for_each_peer_device(peer_device, device) {
|
|
if (!has_net_conf(peer_device->connection))
|
|
continue;
|
|
peer_devices++;
|
|
}
|
|
|
|
device_to_info(&info, device);
|
|
mutex_lock(¬ification_mutex);
|
|
flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
|
|
notify_device_state(NULL, 0, device, &info, NOTIFY_CREATE | flags);
|
|
for_each_peer_device(peer_device, device) {
|
|
struct peer_device_info peer_device_info;
|
|
|
|
if (!has_net_conf(peer_device->connection))
|
|
continue;
|
|
peer_device_to_info(&peer_device_info, peer_device);
|
|
flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
|
|
notify_peer_device_state(NULL, 0, peer_device, &peer_device_info,
|
|
NOTIFY_CREATE | flags);
|
|
}
|
|
mutex_unlock(¬ification_mutex);
|
|
}
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_ret_code adm_del_minor(struct drbd_device *device)
|
|
{
|
|
struct drbd_peer_device *peer_device;
|
|
|
|
if (device->state.disk == D_DISKLESS &&
|
|
/* no need to be device->state.conn == C_STANDALONE &&
|
|
* we may want to delete a minor from a live replication group.
|
|
*/
|
|
device->state.role == R_SECONDARY) {
|
|
struct drbd_connection *connection =
|
|
first_connection(device->resource);
|
|
|
|
_drbd_request_state(device, NS(conn, C_WF_REPORT_PARAMS),
|
|
CS_VERBOSE + CS_WAIT_COMPLETE);
|
|
|
|
/* If the state engine hasn't stopped the sender thread yet, we
|
|
* need to flush the sender work queue before generating the
|
|
* DESTROY events here. */
|
|
if (get_t_state(&connection->worker) == RUNNING)
|
|
drbd_flush_workqueue(&connection->sender_work);
|
|
|
|
mutex_lock(¬ification_mutex);
|
|
for_each_peer_device(peer_device, device) {
|
|
if (!has_net_conf(peer_device->connection))
|
|
continue;
|
|
notify_peer_device_state(NULL, 0, peer_device, NULL,
|
|
NOTIFY_DESTROY | NOTIFY_CONTINUES);
|
|
}
|
|
notify_device_state(NULL, 0, device, NULL, NOTIFY_DESTROY);
|
|
mutex_unlock(¬ification_mutex);
|
|
|
|
drbd_delete_device(device);
|
|
return NO_ERROR;
|
|
} else
|
|
return ERR_MINOR_CONFIGURED;
|
|
}
|
|
|
|
int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mutex_lock(&adm_ctx.resource->adm_mutex);
|
|
retcode = adm_del_minor(adm_ctx.device);
|
|
mutex_unlock(&adm_ctx.resource->adm_mutex);
|
|
out:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int adm_del_resource(struct drbd_resource *resource)
|
|
{
|
|
struct drbd_connection *connection;
|
|
|
|
for_each_connection(connection, resource) {
|
|
if (connection->cstate > C_STANDALONE)
|
|
return ERR_NET_CONFIGURED;
|
|
}
|
|
if (!idr_is_empty(&resource->devices))
|
|
return ERR_RES_IN_USE;
|
|
|
|
/* The state engine has stopped the sender thread, so we don't
|
|
* need to flush the sender work queue before generating the
|
|
* DESTROY event here. */
|
|
mutex_lock(¬ification_mutex);
|
|
notify_resource_state(NULL, 0, resource, NULL, NOTIFY_DESTROY);
|
|
mutex_unlock(¬ification_mutex);
|
|
|
|
mutex_lock(&resources_mutex);
|
|
list_del_rcu(&resource->resources);
|
|
mutex_unlock(&resources_mutex);
|
|
/* Make sure all threads have actually stopped: state handling only
|
|
* does drbd_thread_stop_nowait(). */
|
|
list_for_each_entry(connection, &resource->connections, connections)
|
|
drbd_thread_stop(&connection->worker);
|
|
synchronize_rcu();
|
|
drbd_free_resource(resource);
|
|
return NO_ERROR;
|
|
}
|
|
|
|
int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_resource *resource;
|
|
struct drbd_connection *connection;
|
|
struct drbd_device *device;
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
unsigned i;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
resource = adm_ctx.resource;
|
|
mutex_lock(&resource->adm_mutex);
|
|
/* demote */
|
|
for_each_connection(connection, resource) {
|
|
struct drbd_peer_device *peer_device;
|
|
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, i) {
|
|
retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0);
|
|
if (retcode < SS_SUCCESS) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "failed to demote");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
retcode = conn_try_disconnect(connection, 0);
|
|
if (retcode < SS_SUCCESS) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "failed to disconnect");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* detach */
|
|
idr_for_each_entry(&resource->devices, device, i) {
|
|
retcode = adm_detach(device, 0);
|
|
if (retcode < SS_SUCCESS || retcode > NO_ERROR) {
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "failed to detach");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* delete volumes */
|
|
idr_for_each_entry(&resource->devices, device, i) {
|
|
retcode = adm_del_minor(device);
|
|
if (retcode != NO_ERROR) {
|
|
/* "can not happen" */
|
|
drbd_msg_put_info(adm_ctx.reply_skb, "failed to delete volume");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
retcode = adm_del_resource(resource);
|
|
out:
|
|
mutex_unlock(&resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_config_context adm_ctx;
|
|
struct drbd_resource *resource;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
resource = adm_ctx.resource;
|
|
|
|
mutex_lock(&resource->adm_mutex);
|
|
retcode = adm_del_resource(resource);
|
|
mutex_unlock(&resource->adm_mutex);
|
|
finish:
|
|
drbd_adm_finish(&adm_ctx, info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib)
|
|
{
|
|
struct sk_buff *msg;
|
|
struct drbd_genlmsghdr *d_out;
|
|
unsigned seq;
|
|
int err = -ENOMEM;
|
|
|
|
seq = atomic_inc_return(&drbd_genl_seq);
|
|
msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
if (!msg)
|
|
goto failed;
|
|
|
|
err = -EMSGSIZE;
|
|
d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT);
|
|
if (!d_out) /* cannot happen, but anyways. */
|
|
goto nla_put_failure;
|
|
d_out->minor = device_to_minor(device);
|
|
d_out->ret_code = NO_ERROR;
|
|
|
|
if (nla_put_status_info(msg, device, sib))
|
|
goto nla_put_failure;
|
|
genlmsg_end(msg, d_out);
|
|
err = drbd_genl_multicast_events(msg, GFP_NOWAIT);
|
|
/* msg has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
|
|
return;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(msg);
|
|
failed:
|
|
drbd_err(device, "Error %d while broadcasting event. "
|
|
"Event seq:%u sib_reason:%u\n",
|
|
err, seq, sib->sib_reason);
|
|
}
|
|
|
|
static int nla_put_notification_header(struct sk_buff *msg,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct drbd_notification_header nh = {
|
|
.nh_type = type,
|
|
};
|
|
|
|
return drbd_notification_header_to_skb(msg, &nh, true);
|
|
}
|
|
|
|
int notify_resource_state(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_resource *resource,
|
|
struct resource_info *resource_info,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct resource_statistics resource_statistics;
|
|
struct drbd_genlmsghdr *dh;
|
|
bool multicast = false;
|
|
int err;
|
|
|
|
if (!skb) {
|
|
seq = atomic_inc_return(¬ify_genl_seq);
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
err = -ENOMEM;
|
|
if (!skb)
|
|
goto failed;
|
|
multicast = true;
|
|
}
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_RESOURCE_STATE);
|
|
if (!dh)
|
|
goto nla_put_failure;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_drbd_cfg_context(skb, resource, NULL, NULL) ||
|
|
nla_put_notification_header(skb, type) ||
|
|
((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
|
|
resource_info_to_skb(skb, resource_info, true)))
|
|
goto nla_put_failure;
|
|
resource_statistics.res_stat_write_ordering = resource->write_ordering;
|
|
err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN));
|
|
if (err)
|
|
goto nla_put_failure;
|
|
genlmsg_end(skb, dh);
|
|
if (multicast) {
|
|
err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
|
|
/* skb has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(skb);
|
|
failed:
|
|
drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n",
|
|
err, seq);
|
|
return err;
|
|
}
|
|
|
|
int notify_device_state(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_device *device,
|
|
struct device_info *device_info,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct device_statistics device_statistics;
|
|
struct drbd_genlmsghdr *dh;
|
|
bool multicast = false;
|
|
int err;
|
|
|
|
if (!skb) {
|
|
seq = atomic_inc_return(¬ify_genl_seq);
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
err = -ENOMEM;
|
|
if (!skb)
|
|
goto failed;
|
|
multicast = true;
|
|
}
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_DEVICE_STATE);
|
|
if (!dh)
|
|
goto nla_put_failure;
|
|
dh->minor = device->minor;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_drbd_cfg_context(skb, device->resource, NULL, device) ||
|
|
nla_put_notification_header(skb, type) ||
|
|
((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
|
|
device_info_to_skb(skb, device_info, true)))
|
|
goto nla_put_failure;
|
|
device_to_statistics(&device_statistics, device);
|
|
device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN));
|
|
genlmsg_end(skb, dh);
|
|
if (multicast) {
|
|
err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
|
|
/* skb has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(skb);
|
|
failed:
|
|
drbd_err(device, "Error %d while broadcasting event. Event seq:%u\n",
|
|
err, seq);
|
|
return err;
|
|
}
|
|
|
|
int notify_connection_state(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_connection *connection,
|
|
struct connection_info *connection_info,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct connection_statistics connection_statistics;
|
|
struct drbd_genlmsghdr *dh;
|
|
bool multicast = false;
|
|
int err;
|
|
|
|
if (!skb) {
|
|
seq = atomic_inc_return(¬ify_genl_seq);
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
err = -ENOMEM;
|
|
if (!skb)
|
|
goto failed;
|
|
multicast = true;
|
|
}
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_CONNECTION_STATE);
|
|
if (!dh)
|
|
goto nla_put_failure;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) ||
|
|
nla_put_notification_header(skb, type) ||
|
|
((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
|
|
connection_info_to_skb(skb, connection_info, true)))
|
|
goto nla_put_failure;
|
|
connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);
|
|
connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN));
|
|
genlmsg_end(skb, dh);
|
|
if (multicast) {
|
|
err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
|
|
/* skb has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(skb);
|
|
failed:
|
|
drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",
|
|
err, seq);
|
|
return err;
|
|
}
|
|
|
|
int notify_peer_device_state(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_peer_device *peer_device,
|
|
struct peer_device_info *peer_device_info,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct peer_device_statistics peer_device_statistics;
|
|
struct drbd_resource *resource = peer_device->device->resource;
|
|
struct drbd_genlmsghdr *dh;
|
|
bool multicast = false;
|
|
int err;
|
|
|
|
if (!skb) {
|
|
seq = atomic_inc_return(¬ify_genl_seq);
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
err = -ENOMEM;
|
|
if (!skb)
|
|
goto failed;
|
|
multicast = true;
|
|
}
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_PEER_DEVICE_STATE);
|
|
if (!dh)
|
|
goto nla_put_failure;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) ||
|
|
nla_put_notification_header(skb, type) ||
|
|
((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
|
|
peer_device_info_to_skb(skb, peer_device_info, true)))
|
|
goto nla_put_failure;
|
|
peer_device_to_statistics(&peer_device_statistics, peer_device);
|
|
peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN));
|
|
genlmsg_end(skb, dh);
|
|
if (multicast) {
|
|
err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
|
|
/* skb has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
}
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(skb);
|
|
failed:
|
|
drbd_err(peer_device, "Error %d while broadcasting event. Event seq:%u\n",
|
|
err, seq);
|
|
return err;
|
|
}
|
|
|
|
void notify_helper(enum drbd_notification_type type,
|
|
struct drbd_device *device, struct drbd_connection *connection,
|
|
const char *name, int status)
|
|
{
|
|
struct drbd_resource *resource = device ? device->resource : connection->resource;
|
|
struct drbd_helper_info helper_info;
|
|
unsigned int seq = atomic_inc_return(¬ify_genl_seq);
|
|
struct sk_buff *skb = NULL;
|
|
struct drbd_genlmsghdr *dh;
|
|
int err;
|
|
|
|
strscpy(helper_info.helper_name, name, sizeof(helper_info.helper_name));
|
|
helper_info.helper_name_len = min(strlen(name), sizeof(helper_info.helper_name));
|
|
helper_info.helper_status = status;
|
|
|
|
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
|
|
err = -ENOMEM;
|
|
if (!skb)
|
|
goto fail;
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_HELPER);
|
|
if (!dh)
|
|
goto fail;
|
|
dh->minor = device ? device->minor : -1;
|
|
dh->ret_code = NO_ERROR;
|
|
mutex_lock(¬ification_mutex);
|
|
if (nla_put_drbd_cfg_context(skb, resource, connection, device) ||
|
|
nla_put_notification_header(skb, type) ||
|
|
drbd_helper_info_to_skb(skb, &helper_info, true))
|
|
goto unlock_fail;
|
|
genlmsg_end(skb, dh);
|
|
err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
|
|
skb = NULL;
|
|
/* skb has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto unlock_fail;
|
|
mutex_unlock(¬ification_mutex);
|
|
return;
|
|
|
|
unlock_fail:
|
|
mutex_unlock(¬ification_mutex);
|
|
fail:
|
|
nlmsg_free(skb);
|
|
drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n",
|
|
err, seq);
|
|
}
|
|
|
|
static int notify_initial_state_done(struct sk_buff *skb, unsigned int seq)
|
|
{
|
|
struct drbd_genlmsghdr *dh;
|
|
int err;
|
|
|
|
err = -EMSGSIZE;
|
|
dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_INITIAL_STATE_DONE);
|
|
if (!dh)
|
|
goto nla_put_failure;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_notification_header(skb, NOTIFY_EXISTS))
|
|
goto nla_put_failure;
|
|
genlmsg_end(skb, dh);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(skb);
|
|
pr_err("Error %d sending event. Event seq:%u\n", err, seq);
|
|
return err;
|
|
}
|
|
|
|
static void free_state_changes(struct list_head *list)
|
|
{
|
|
while (!list_empty(list)) {
|
|
struct drbd_state_change *state_change =
|
|
list_first_entry(list, struct drbd_state_change, list);
|
|
list_del(&state_change->list);
|
|
forget_state_change(state_change);
|
|
}
|
|
}
|
|
|
|
static unsigned int notifications_for_state_change(struct drbd_state_change *state_change)
|
|
{
|
|
return 1 +
|
|
state_change->n_connections +
|
|
state_change->n_devices +
|
|
state_change->n_devices * state_change->n_connections;
|
|
}
|
|
|
|
static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct drbd_state_change *state_change = (struct drbd_state_change *)cb->args[0];
|
|
unsigned int seq = cb->args[2];
|
|
unsigned int n;
|
|
enum drbd_notification_type flags = 0;
|
|
int err = 0;
|
|
|
|
/* There is no need for taking notification_mutex here: it doesn't
|
|
matter if the initial state events mix with later state chage
|
|
events; we can always tell the events apart by the NOTIFY_EXISTS
|
|
flag. */
|
|
|
|
cb->args[5]--;
|
|
if (cb->args[5] == 1) {
|
|
err = notify_initial_state_done(skb, seq);
|
|
goto out;
|
|
}
|
|
n = cb->args[4]++;
|
|
if (cb->args[4] < cb->args[3])
|
|
flags |= NOTIFY_CONTINUES;
|
|
if (n < 1) {
|
|
err = notify_resource_state_change(skb, seq, state_change->resource,
|
|
NOTIFY_EXISTS | flags);
|
|
goto next;
|
|
}
|
|
n--;
|
|
if (n < state_change->n_connections) {
|
|
err = notify_connection_state_change(skb, seq, &state_change->connections[n],
|
|
NOTIFY_EXISTS | flags);
|
|
goto next;
|
|
}
|
|
n -= state_change->n_connections;
|
|
if (n < state_change->n_devices) {
|
|
err = notify_device_state_change(skb, seq, &state_change->devices[n],
|
|
NOTIFY_EXISTS | flags);
|
|
goto next;
|
|
}
|
|
n -= state_change->n_devices;
|
|
if (n < state_change->n_devices * state_change->n_connections) {
|
|
err = notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n],
|
|
NOTIFY_EXISTS | flags);
|
|
goto next;
|
|
}
|
|
|
|
next:
|
|
if (cb->args[4] == cb->args[3]) {
|
|
struct drbd_state_change *next_state_change =
|
|
list_entry(state_change->list.next,
|
|
struct drbd_state_change, list);
|
|
cb->args[0] = (long)next_state_change;
|
|
cb->args[3] = notifications_for_state_change(next_state_change);
|
|
cb->args[4] = 0;
|
|
}
|
|
out:
|
|
if (err)
|
|
return err;
|
|
else
|
|
return skb->len;
|
|
}
|
|
|
|
int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct drbd_resource *resource;
|
|
LIST_HEAD(head);
|
|
|
|
if (cb->args[5] >= 1) {
|
|
if (cb->args[5] > 1)
|
|
return get_initial_state(skb, cb);
|
|
if (cb->args[0]) {
|
|
struct drbd_state_change *state_change =
|
|
(struct drbd_state_change *)cb->args[0];
|
|
|
|
/* connect list to head */
|
|
list_add(&head, &state_change->list);
|
|
free_state_changes(&head);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
cb->args[5] = 2; /* number of iterations */
|
|
mutex_lock(&resources_mutex);
|
|
for_each_resource(resource, &drbd_resources) {
|
|
struct drbd_state_change *state_change;
|
|
|
|
state_change = remember_old_state(resource, GFP_KERNEL);
|
|
if (!state_change) {
|
|
if (!list_empty(&head))
|
|
free_state_changes(&head);
|
|
mutex_unlock(&resources_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
copy_old_to_new_state_change(state_change);
|
|
list_add_tail(&state_change->list, &head);
|
|
cb->args[5] += notifications_for_state_change(state_change);
|
|
}
|
|
mutex_unlock(&resources_mutex);
|
|
|
|
if (!list_empty(&head)) {
|
|
struct drbd_state_change *state_change =
|
|
list_entry(head.next, struct drbd_state_change, list);
|
|
cb->args[0] = (long)state_change;
|
|
cb->args[3] = notifications_for_state_change(state_change);
|
|
list_del(&head); /* detach list from head */
|
|
}
|
|
|
|
cb->args[2] = cb->nlh->nlmsg_seq;
|
|
return get_initial_state(skb, cb);
|
|
}
|