3238 lines
87 KiB
C
3238 lines
87 KiB
C
/*
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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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drbd is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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drbd is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with drbd; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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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_req.h"
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#include "drbd_wrappers.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_add_minor(struct sk_buff *skb, struct genl_info *info);
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int drbd_adm_delete_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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#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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/* 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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/* Configuration is strictly serialized, because generic netlink message
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* processing is strictly serialized by the genl_lock().
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* Which means we can use one static global drbd_config_context struct.
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*/
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static struct drbd_config_context {
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/* assigned from drbd_genlmsghdr */
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unsigned int minor;
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/* assigned from request attributes, if present */
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unsigned int volume;
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#define VOLUME_UNSPECIFIED (-1U)
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/* pointer into the request skb,
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* limited lifetime! */
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char *resource_name;
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struct nlattr *my_addr;
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struct nlattr *peer_addr;
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/* reply buffer */
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struct sk_buff *reply_skb;
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/* pointer into reply buffer */
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struct drbd_genlmsghdr *reply_dh;
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/* resolved from attributes, if possible */
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struct drbd_conf *mdev;
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struct drbd_tconn *tconn;
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} adm_ctx;
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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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printk(KERN_ERR "drbd: 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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int drbd_msg_put_info(const char *info)
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{
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struct sk_buff *skb = adm_ctx.reply_skb;
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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(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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/* 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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#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 sk_buff *skb, struct genl_info *info,
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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
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&& security_netlink_recv(skb, CAP_SYS_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 global 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.tconn->my_addr)) ||
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(adm_ctx.peer_addr &&
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nla_len(adm_ctx.peer_addr) > sizeof(adm_ctx.tconn->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.mdev = minor_to_mdev(d_in->minor);
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adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name);
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if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) {
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drbd_msg_put_info("unknown minor");
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return ERR_MINOR_INVALID;
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}
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if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_RESOURCE)) {
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drbd_msg_put_info("unknown resource");
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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.tconn && !(flags & DRBD_ADM_NEED_RESOURCE)) {
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drbd_msg_put_info("no resource name expected");
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return ERR_INVALID_REQUEST;
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}
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if (adm_ctx.mdev) {
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drbd_msg_put_info("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.tconn = 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.tconn) {
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drbd_msg_put_info("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.mdev && adm_ctx.tconn &&
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adm_ctx.mdev->tconn != adm_ctx.tconn) {
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pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n",
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adm_ctx.minor, adm_ctx.resource_name,
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adm_ctx.mdev->tconn->name);
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drbd_msg_put_info("minor exists in different resource");
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return ERR_INVALID_REQUEST;
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}
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if (adm_ctx.mdev &&
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adm_ctx.volume != VOLUME_UNSPECIFIED &&
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adm_ctx.volume != adm_ctx.mdev->vnr) {
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pr_warning("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.mdev->vnr, adm_ctx.mdev->tconn->name);
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drbd_msg_put_info("minor exists as different volume");
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return ERR_INVALID_REQUEST;
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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 genl_info *info, int retcode)
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{
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if (adm_ctx.tconn) {
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kref_put(&adm_ctx.tconn->kref, &conn_destroy);
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adm_ctx.tconn = 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_tconn *tconn, 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 (tconn->my_addr_len == 0 || tconn->peer_addr_len == 0)
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return;
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switch (((struct sockaddr *)&tconn->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 *)&tconn->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 *)&tconn->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 *)&tconn->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_conf *mdev, 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[12];
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char *argv[] = {usermode_helper, cmd, mb, NULL };
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struct sib_info sib;
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int ret;
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snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev));
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setup_khelper_env(mdev->tconn, 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(mdev);
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dev_info(DEV, "helper command: %s %s %s\n", 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(mdev, &sib);
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ret = call_usermodehelper(usermode_helper, argv, envp, 1);
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if (ret)
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dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
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usermode_helper, cmd, mb,
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(ret >> 8) & 0xff, ret);
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else
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dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
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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(mdev, &sib);
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if (ret < 0) /* Ignore any ERRNOs we got. */
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ret = 0;
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|
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return ret;
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}
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|
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static void conn_md_sync(struct drbd_tconn *tconn)
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{
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struct drbd_conf *mdev;
|
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int vnr;
|
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|
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rcu_read_lock();
|
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idr_for_each_entry(&tconn->volumes, mdev, vnr) {
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kref_get(&mdev->kref);
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rcu_read_unlock();
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drbd_md_sync(mdev);
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kref_put(&mdev->kref, &drbd_minor_destroy);
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rcu_read_lock();
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}
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rcu_read_unlock();
|
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}
|
|
|
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int conn_khelper(struct drbd_tconn *tconn, char *cmd)
|
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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 *argv[] = {usermode_helper, cmd, tconn->name, NULL };
|
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int ret;
|
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|
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setup_khelper_env(tconn, envp);
|
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conn_md_sync(tconn);
|
|
|
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conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name);
|
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/* TODO: conn_bcast_event() ?? */
|
|
|
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ret = call_usermodehelper(usermode_helper, argv, envp, 1);
|
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if (ret)
|
|
conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
|
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usermode_helper, cmd, tconn->name,
|
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(ret >> 8) & 0xff, ret);
|
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else
|
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conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
|
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usermode_helper, cmd, tconn->name,
|
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(ret >> 8) & 0xff, ret);
|
|
/* TODO: conn_bcast_event() ?? */
|
|
|
|
if (ret < 0) /* Ignore any ERRNOs we got. */
|
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ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn)
|
|
{
|
|
enum drbd_fencing_p fp = FP_NOT_AVAIL;
|
|
struct drbd_conf *mdev;
|
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int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
if (get_ldev_if_state(mdev, D_CONSISTENT)) {
|
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fp = max_t(enum drbd_fencing_p, fp,
|
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rcu_dereference(mdev->ldev->disk_conf)->fencing);
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return fp;
|
|
}
|
|
|
|
bool conn_try_outdate_peer(struct drbd_tconn *tconn)
|
|
{
|
|
union drbd_state mask = { };
|
|
union drbd_state val = { };
|
|
enum drbd_fencing_p fp;
|
|
char *ex_to_string;
|
|
int r;
|
|
|
|
if (tconn->cstate >= C_WF_REPORT_PARAMS) {
|
|
conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n");
|
|
return false;
|
|
}
|
|
|
|
fp = highest_fencing_policy(tconn);
|
|
switch (fp) {
|
|
case FP_NOT_AVAIL:
|
|
conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n");
|
|
goto out;
|
|
case FP_DONT_CARE:
|
|
return true;
|
|
default: ;
|
|
}
|
|
|
|
r = conn_khelper(tconn, "fence-peer");
|
|
|
|
switch ((r>>8) & 0xff) {
|
|
case 3: /* peer is inconsistent */
|
|
ex_to_string = "peer is inconsistent or worse";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_INCONSISTENT;
|
|
break;
|
|
case 4: /* peer got outdated, or was already outdated */
|
|
ex_to_string = "peer was fenced";
|
|
mask.pdsk = D_MASK;
|
|
val.pdsk = D_OUTDATED;
|
|
break;
|
|
case 5: /* peer was down */
|
|
if (conn_highest_disk(tconn) == 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 6: /* 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";
|
|
conn_warn(tconn, "Peer is primary, outdating myself.\n");
|
|
mask.disk = D_MASK;
|
|
val.disk = D_OUTDATED;
|
|
break;
|
|
case 7:
|
|
if (fp != FP_STONITH)
|
|
conn_err(tconn, "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 ... */
|
|
conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
|
|
return false; /* Eventually leave IO frozen */
|
|
}
|
|
|
|
conn_info(tconn, "fence-peer helper returned %d (%s)\n",
|
|
(r>>8) & 0xff, ex_to_string);
|
|
|
|
out:
|
|
|
|
/* Not using
|
|
conn_request_state(tconn, mask, val, CS_VERBOSE);
|
|
here, because we might were able to re-establish the connection in the
|
|
meantime. */
|
|
spin_lock_irq(&tconn->req_lock);
|
|
if (tconn->cstate < C_WF_REPORT_PARAMS)
|
|
_conn_request_state(tconn, mask, val, CS_VERBOSE);
|
|
spin_unlock_irq(&tconn->req_lock);
|
|
|
|
return conn_highest_pdsk(tconn) <= D_OUTDATED;
|
|
}
|
|
|
|
static int _try_outdate_peer_async(void *data)
|
|
{
|
|
struct drbd_tconn *tconn = (struct drbd_tconn *)data;
|
|
|
|
conn_try_outdate_peer(tconn);
|
|
|
|
kref_put(&tconn->kref, &conn_destroy);
|
|
return 0;
|
|
}
|
|
|
|
void conn_try_outdate_peer_async(struct drbd_tconn *tconn)
|
|
{
|
|
struct task_struct *opa;
|
|
|
|
kref_get(&tconn->kref);
|
|
opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h");
|
|
if (IS_ERR(opa)) {
|
|
conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n");
|
|
kref_put(&tconn->kref, &conn_destroy);
|
|
}
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
|
|
{
|
|
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)
|
|
request_ping(mdev->tconn); /* Detect a dead peer ASAP */
|
|
|
|
mutex_lock(mdev->state_mutex);
|
|
|
|
mask.i = 0; mask.role = R_MASK;
|
|
val.i = 0; val.role = new_role;
|
|
|
|
while (try++ < max_tries) {
|
|
rv = _drbd_request_state(mdev, 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 &&
|
|
(mdev->state.disk < D_UP_TO_DATE &&
|
|
mdev->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 &&
|
|
mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) {
|
|
D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
|
|
|
|
if (conn_try_outdate_peer(mdev->tconn)) {
|
|
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(mdev->tconn) && force) {
|
|
dev_warn(DEV, "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. */
|
|
int timeo;
|
|
rcu_read_lock();
|
|
nc = rcu_dereference(mdev->tconn->net_conf);
|
|
timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
|
|
rcu_read_unlock();
|
|
schedule_timeout_interruptible(timeo);
|
|
if (try < max_tries)
|
|
try = max_tries - 1;
|
|
continue;
|
|
}
|
|
if (rv < SS_SUCCESS) {
|
|
rv = _drbd_request_state(mdev, mask, val,
|
|
CS_VERBOSE + CS_WAIT_COMPLETE);
|
|
if (rv < SS_SUCCESS)
|
|
goto out;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (rv < SS_SUCCESS)
|
|
goto out;
|
|
|
|
if (forced)
|
|
dev_warn(DEV, "Forced to consider local data as UpToDate!\n");
|
|
|
|
/* Wait until nothing is on the fly :) */
|
|
wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0);
|
|
|
|
if (new_role == R_SECONDARY) {
|
|
set_disk_ro(mdev->vdisk, true);
|
|
if (get_ldev(mdev)) {
|
|
mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
|
|
put_ldev(mdev);
|
|
}
|
|
} else {
|
|
mutex_lock(&mdev->tconn->conf_update);
|
|
nc = mdev->tconn->net_conf;
|
|
if (nc)
|
|
nc->discard_my_data = 0; /* without copy; single bit op is atomic */
|
|
mutex_unlock(&mdev->tconn->conf_update);
|
|
|
|
set_disk_ro(mdev->vdisk, false);
|
|
if (get_ldev(mdev)) {
|
|
if (((mdev->state.conn < C_CONNECTED ||
|
|
mdev->state.pdsk <= D_FAILED)
|
|
&& mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced)
|
|
drbd_uuid_new_current(mdev);
|
|
|
|
mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
|
|
/* writeout of activity log covered areas of the bitmap
|
|
* to stable storage done in after state change already */
|
|
|
|
if (mdev->state.conn >= C_WF_REPORT_PARAMS) {
|
|
/* if this was forced, we should consider sync */
|
|
if (forced)
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_state(mdev);
|
|
}
|
|
|
|
drbd_md_sync(mdev);
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
out:
|
|
mutex_unlock(mdev->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 set_role_parms parms;
|
|
int err;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(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(from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
|
|
retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate);
|
|
else
|
|
retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
/* initializes the md.*_offset members, so we are able to find
|
|
* the on disk meta data */
|
|
static void drbd_md_set_sector_offsets(struct drbd_conf *mdev,
|
|
struct drbd_backing_dev *bdev)
|
|
{
|
|
sector_t md_size_sect = 0;
|
|
int meta_dev_idx;
|
|
|
|
rcu_read_lock();
|
|
meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx;
|
|
|
|
switch (meta_dev_idx) {
|
|
default:
|
|
/* v07 style fixed size indexed meta data */
|
|
bdev->md.md_size_sect = MD_RESERVED_SECT;
|
|
bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
|
|
bdev->md.al_offset = MD_AL_OFFSET;
|
|
bdev->md.bm_offset = MD_BM_OFFSET;
|
|
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.md_offset = 0;
|
|
bdev->md.al_offset = MD_AL_OFFSET;
|
|
bdev->md.bm_offset = MD_BM_OFFSET;
|
|
break;
|
|
case DRBD_MD_INDEX_INTERNAL:
|
|
case DRBD_MD_INDEX_FLEX_INT:
|
|
bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
|
|
/* al size is still fixed */
|
|
bdev->md.al_offset = -MD_AL_SECTORS;
|
|
/* 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_BM_OFFSET;
|
|
|
|
bdev->md.md_size_sect = md_size_sect;
|
|
/* bitmap offset is adjusted by 'super' block size */
|
|
bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* 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 mdev->flag, is triggered by drbd internals,
|
|
* and should be short-lived. */
|
|
void drbd_suspend_io(struct drbd_conf *mdev)
|
|
{
|
|
set_bit(SUSPEND_IO, &mdev->flags);
|
|
if (drbd_suspended(mdev))
|
|
return;
|
|
wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt));
|
|
}
|
|
|
|
void drbd_resume_io(struct drbd_conf *mdev)
|
|
{
|
|
clear_bit(SUSPEND_IO, &mdev->flags);
|
|
wake_up(&mdev->misc_wait);
|
|
}
|
|
|
|
/**
|
|
* drbd_determine_dev_size() - Sets the right device size obeying all constraints
|
|
* @mdev: 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_conf *mdev, enum dds_flags flags) __must_hold(local)
|
|
{
|
|
sector_t prev_first_sect, prev_size; /* previous meta location */
|
|
sector_t la_size, u_size;
|
|
sector_t size;
|
|
char ppb[10];
|
|
|
|
int md_moved, la_size_changed;
|
|
enum determine_dev_size rv = unchanged;
|
|
|
|
/* race:
|
|
* application request passes inc_ap_bio,
|
|
* but then cannot get an AL-reference.
|
|
* this function later may wait on ap_bio_cnt == 0. -> deadlock.
|
|
*
|
|
* to avoid that:
|
|
* Suspend IO right here.
|
|
* still lock the act_log to not trigger ASSERTs there.
|
|
*/
|
|
drbd_suspend_io(mdev);
|
|
|
|
/* no wait necessary anymore, actually we could assert that */
|
|
wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
|
|
|
|
prev_first_sect = drbd_md_first_sector(mdev->ldev);
|
|
prev_size = mdev->ldev->md.md_size_sect;
|
|
la_size = mdev->ldev->md.la_size_sect;
|
|
|
|
/* TODO: should only be some assert here, not (re)init... */
|
|
drbd_md_set_sector_offsets(mdev, mdev->ldev);
|
|
|
|
rcu_read_lock();
|
|
u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
|
|
rcu_read_unlock();
|
|
size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED);
|
|
|
|
if (drbd_get_capacity(mdev->this_bdev) != size ||
|
|
drbd_bm_capacity(mdev) != size) {
|
|
int err;
|
|
err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC));
|
|
if (unlikely(err)) {
|
|
/* currently there is only one error: ENOMEM! */
|
|
size = drbd_bm_capacity(mdev)>>1;
|
|
if (size == 0) {
|
|
dev_err(DEV, "OUT OF MEMORY! "
|
|
"Could not allocate bitmap!\n");
|
|
} else {
|
|
dev_err(DEV, "BM resizing failed. "
|
|
"Leaving size unchanged at size = %lu KB\n",
|
|
(unsigned long)size);
|
|
}
|
|
rv = dev_size_error;
|
|
}
|
|
/* racy, see comments above. */
|
|
drbd_set_my_capacity(mdev, size);
|
|
mdev->ldev->md.la_size_sect = size;
|
|
dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
|
|
(unsigned long long)size>>1);
|
|
}
|
|
if (rv == dev_size_error)
|
|
goto out;
|
|
|
|
la_size_changed = (la_size != mdev->ldev->md.la_size_sect);
|
|
|
|
md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev)
|
|
|| prev_size != mdev->ldev->md.md_size_sect;
|
|
|
|
if (la_size_changed || md_moved) {
|
|
int err;
|
|
|
|
drbd_al_shrink(mdev); /* All extents inactive. */
|
|
dev_info(DEV, "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() */
|
|
err = drbd_bitmap_io(mdev, &drbd_bm_write,
|
|
"size changed", BM_LOCKED_MASK);
|
|
if (err) {
|
|
rv = dev_size_error;
|
|
goto out;
|
|
}
|
|
drbd_md_mark_dirty(mdev);
|
|
}
|
|
|
|
if (size > la_size)
|
|
rv = grew;
|
|
if (size < la_size)
|
|
rv = shrunk;
|
|
out:
|
|
lc_unlock(mdev->act_log);
|
|
wake_up(&mdev->al_wait);
|
|
drbd_resume_io(mdev);
|
|
|
|
return rv;
|
|
}
|
|
|
|
sector_t
|
|
drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
|
|
sector_t u_size, int assume_peer_has_space)
|
|
{
|
|
sector_t p_size = mdev->p_size; /* partner's disk size. */
|
|
sector_t la_size = 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 (mdev->state.conn < C_CONNECTED && assume_peer_has_space) {
|
|
dev_warn(DEV, "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) {
|
|
size = la_size;
|
|
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)
|
|
dev_err(DEV, "Both nodes diskless!\n");
|
|
|
|
if (u_size) {
|
|
if (u_size > size)
|
|
dev_err(DEV, "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
|
|
* @mdev: 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_conf *mdev, struct disk_conf *dc)
|
|
{
|
|
struct lru_cache *n, *t;
|
|
struct lc_element *e;
|
|
unsigned int in_use;
|
|
int i;
|
|
|
|
if (mdev->act_log &&
|
|
mdev->act_log->nr_elements == dc->al_extents)
|
|
return 0;
|
|
|
|
in_use = 0;
|
|
t = mdev->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) {
|
|
dev_err(DEV, "Cannot allocate act_log lru!\n");
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_irq(&mdev->al_lock);
|
|
if (t) {
|
|
for (i = 0; i < t->nr_elements; i++) {
|
|
e = lc_element_by_index(t, i);
|
|
if (e->refcnt)
|
|
dev_err(DEV, "refcnt(%d)==%d\n",
|
|
e->lc_number, e->refcnt);
|
|
in_use += e->refcnt;
|
|
}
|
|
}
|
|
if (!in_use)
|
|
mdev->act_log = n;
|
|
spin_unlock_irq(&mdev->al_lock);
|
|
if (in_use) {
|
|
dev_err(DEV, "Activity log still in use!\n");
|
|
lc_destroy(n);
|
|
return -EBUSY;
|
|
} else {
|
|
if (t)
|
|
lc_destroy(t);
|
|
}
|
|
drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */
|
|
return 0;
|
|
}
|
|
|
|
static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size)
|
|
{
|
|
struct request_queue * const q = mdev->rq_queue;
|
|
int max_hw_sectors = max_bio_size >> 9;
|
|
int max_segments = 0;
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
|
|
|
|
max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
|
|
rcu_read_lock();
|
|
max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs;
|
|
rcu_read_unlock();
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
blk_queue_logical_block_size(q, 512);
|
|
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_CACHE_SIZE-1);
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
|
|
|
|
blk_queue_stack_limits(q, b);
|
|
|
|
if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
|
|
dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
|
|
q->backing_dev_info.ra_pages,
|
|
b->backing_dev_info.ra_pages);
|
|
q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
|
|
}
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
|
|
void drbd_reconsider_max_bio_size(struct drbd_conf *mdev)
|
|
{
|
|
int now, new, local, peer;
|
|
|
|
now = queue_max_hw_sectors(mdev->rq_queue) << 9;
|
|
local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */
|
|
peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9;
|
|
mdev->local_max_bio_size = local;
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* 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 (mdev->state.conn >= C_CONNECTED) {
|
|
if (mdev->tconn->agreed_pro_version < 94)
|
|
peer = min_t(int, mdev->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 (mdev->tconn->agreed_pro_version == 94)
|
|
peer = DRBD_MAX_SIZE_H80_PACKET;
|
|
else if (mdev->tconn->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;
|
|
}
|
|
|
|
new = min_t(int, local, peer);
|
|
|
|
if (mdev->state.role == R_PRIMARY && new < now)
|
|
dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now);
|
|
|
|
if (new != now)
|
|
dev_info(DEV, "max BIO size = %u\n", new);
|
|
|
|
drbd_setup_queue_param(mdev, new);
|
|
}
|
|
|
|
/* Starts the worker thread */
|
|
static void conn_reconfig_start(struct drbd_tconn *tconn)
|
|
{
|
|
drbd_thread_start(&tconn->worker);
|
|
conn_flush_workqueue(tconn);
|
|
}
|
|
|
|
/* if still unconfigured, stops worker again. */
|
|
static void conn_reconfig_done(struct drbd_tconn *tconn)
|
|
{
|
|
bool stop_threads;
|
|
spin_lock_irq(&tconn->req_lock);
|
|
stop_threads = conn_all_vols_unconf(tconn) &&
|
|
tconn->cstate == C_STANDALONE;
|
|
spin_unlock_irq(&tconn->req_lock);
|
|
if (stop_threads) {
|
|
/* asender is implicitly stopped by receiver
|
|
* in conn_disconnect() */
|
|
drbd_thread_stop(&tconn->receiver);
|
|
drbd_thread_stop(&tconn->worker);
|
|
}
|
|
}
|
|
|
|
/* Make sure IO is suspended before calling this function(). */
|
|
static void drbd_suspend_al(struct drbd_conf *mdev)
|
|
{
|
|
int s = 0;
|
|
|
|
if (!lc_try_lock(mdev->act_log)) {
|
|
dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n");
|
|
return;
|
|
}
|
|
|
|
drbd_al_shrink(mdev);
|
|
spin_lock_irq(&mdev->tconn->req_lock);
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags);
|
|
spin_unlock_irq(&mdev->tconn->req_lock);
|
|
lc_unlock(mdev->act_log);
|
|
|
|
if (s)
|
|
dev_info(DEV, "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 void enforce_disk_conf_limits(struct disk_conf *dc)
|
|
{
|
|
if (dc->al_extents < DRBD_AL_EXTENTS_MIN)
|
|
dc->al_extents = DRBD_AL_EXTENTS_MIN;
|
|
if (dc->al_extents > DRBD_AL_EXTENTS_MAX)
|
|
dc->al_extents = DRBD_AL_EXTENTS_MAX;
|
|
|
|
if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
|
|
dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
|
|
}
|
|
|
|
int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct drbd_conf *mdev;
|
|
struct disk_conf *new_disk_conf, *old_disk_conf;
|
|
struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
|
|
int err, fifo_size;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
|
|
/* we also need a disk
|
|
* to change the options on */
|
|
if (!get_ldev(mdev)) {
|
|
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(&mdev->tconn->conf_update);
|
|
old_disk_conf = mdev->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(from_attrs_err_to_txt(err));
|
|
}
|
|
|
|
if (!expect(new_disk_conf->resync_rate >= 1))
|
|
new_disk_conf->resync_rate = 1;
|
|
|
|
enforce_disk_conf_limits(new_disk_conf);
|
|
|
|
fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
|
|
if (fifo_size != mdev->rs_plan_s->size) {
|
|
new_plan = fifo_alloc(fifo_size);
|
|
if (!new_plan) {
|
|
dev_err(DEV, "kmalloc of fifo_buffer failed");
|
|
retcode = ERR_NOMEM;
|
|
goto fail_unlock;
|
|
}
|
|
}
|
|
|
|
wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
|
|
drbd_al_shrink(mdev);
|
|
err = drbd_check_al_size(mdev, new_disk_conf);
|
|
lc_unlock(mdev->act_log);
|
|
wake_up(&mdev->al_wait);
|
|
|
|
if (err) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail_unlock;
|
|
}
|
|
|
|
write_lock_irq(&global_state_lock);
|
|
retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after);
|
|
if (retcode == NO_ERROR) {
|
|
rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
|
|
drbd_resync_after_changed(mdev);
|
|
}
|
|
write_unlock_irq(&global_state_lock);
|
|
|
|
if (retcode != NO_ERROR)
|
|
goto fail_unlock;
|
|
|
|
if (new_plan) {
|
|
old_plan = mdev->rs_plan_s;
|
|
rcu_assign_pointer(mdev->rs_plan_s, new_plan);
|
|
}
|
|
|
|
mutex_unlock(&mdev->tconn->conf_update);
|
|
drbd_md_sync(mdev);
|
|
|
|
if (mdev->state.conn >= C_CONNECTED)
|
|
drbd_send_sync_param(mdev);
|
|
|
|
synchronize_rcu();
|
|
kfree(old_disk_conf);
|
|
kfree(old_plan);
|
|
mod_timer(&mdev->request_timer, jiffies + HZ);
|
|
goto success;
|
|
|
|
fail_unlock:
|
|
mutex_unlock(&mdev->tconn->conf_update);
|
|
fail:
|
|
kfree(new_disk_conf);
|
|
kfree(new_plan);
|
|
success:
|
|
put_ldev(mdev);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
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 block_device *bdev;
|
|
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(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto finish;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
conn_reconfig_start(mdev->tconn);
|
|
|
|
/* if you want to reconfigure, please tear down first */
|
|
if (mdev->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(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
|
|
|
|
/* allocation not in the IO path, drbdsetup context */
|
|
nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
|
|
if (!nbc) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
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(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
enforce_disk_conf_limits(new_disk_conf);
|
|
|
|
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(mdev->tconn->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();
|
|
|
|
bdev = blkdev_get_by_path(new_disk_conf->backing_dev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev);
|
|
if (IS_ERR(bdev)) {
|
|
dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev,
|
|
PTR_ERR(bdev));
|
|
retcode = ERR_OPEN_DISK;
|
|
goto fail;
|
|
}
|
|
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 = blkdev_get_by_path(new_disk_conf->meta_dev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL,
|
|
(new_disk_conf->meta_dev_idx < 0) ?
|
|
(void *)mdev : (void *)drbd_m_holder);
|
|
if (IS_ERR(bdev)) {
|
|
dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev,
|
|
PTR_ERR(bdev));
|
|
retcode = ERR_OPEN_MD_DISK;
|
|
goto fail;
|
|
}
|
|
nbc->md_bdev = bdev;
|
|
|
|
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;
|
|
}
|
|
|
|
/* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
|
|
drbd_md_set_sector_offsets(mdev, nbc);
|
|
|
|
if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) {
|
|
dev_err(DEV, "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_RESERVED_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;
|
|
dev_warn(DEV, "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) <
|
|
drbd_get_capacity(mdev->this_bdev)) {
|
|
retcode = ERR_DISK_TOO_SMALL;
|
|
goto fail;
|
|
}
|
|
|
|
nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
|
|
|
|
if (nbc->known_size > max_possible_sectors) {
|
|
dev_warn(DEV, "==> 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)
|
|
dev_warn(DEV, "==>> using internal or flexible "
|
|
"meta data may help <<==\n");
|
|
}
|
|
|
|
drbd_suspend_io(mdev);
|
|
/* also wait for the last barrier ack. */
|
|
wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev));
|
|
/* and for any other previously queued work */
|
|
drbd_flush_workqueue(mdev);
|
|
|
|
rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
|
|
retcode = rv; /* FIXME: Type mismatch. */
|
|
drbd_resume_io(mdev);
|
|
if (rv < SS_SUCCESS)
|
|
goto fail;
|
|
|
|
if (!get_ldev_if_state(mdev, D_ATTACHING))
|
|
goto force_diskless;
|
|
|
|
drbd_md_set_sector_offsets(mdev, nbc);
|
|
|
|
if (!mdev->bitmap) {
|
|
if (drbd_bm_init(mdev)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
retcode = drbd_md_read(mdev, nbc);
|
|
if (retcode != NO_ERROR)
|
|
goto force_diskless_dec;
|
|
|
|
if (mdev->state.conn < C_CONNECTED &&
|
|
mdev->state.role == R_PRIMARY &&
|
|
(mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
|
|
dev_err(DEV, "Can only attach to data with current UUID=%016llX\n",
|
|
(unsigned long long)mdev->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(mdev, new_disk_conf)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Prevent shrinking of consistent devices ! */
|
|
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
|
|
drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) {
|
|
dev_warn(DEV, "refusing to truncate a consistent device\n");
|
|
retcode = ERR_DISK_TOO_SMALL;
|
|
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, &mdev->flags);
|
|
else
|
|
set_bit(MD_NO_FUA, &mdev->flags);
|
|
|
|
/* Point of no return reached.
|
|
* Devices and memory are no longer released by error cleanup below.
|
|
* now mdev takes over responsibility, and the state engine should
|
|
* clean it up somewhere. */
|
|
D_ASSERT(mdev->ldev == NULL);
|
|
mdev->ldev = nbc;
|
|
mdev->resync = resync_lru;
|
|
mdev->rs_plan_s = new_plan;
|
|
nbc = NULL;
|
|
resync_lru = NULL;
|
|
new_disk_conf = NULL;
|
|
new_plan = NULL;
|
|
|
|
mdev->write_ordering = WO_bdev_flush;
|
|
drbd_bump_write_ordering(mdev, WO_bdev_flush);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY))
|
|
set_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
else
|
|
clear_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
|
|
!(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod))
|
|
set_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
|
|
mdev->send_cnt = 0;
|
|
mdev->recv_cnt = 0;
|
|
mdev->read_cnt = 0;
|
|
mdev->writ_cnt = 0;
|
|
|
|
drbd_reconsider_max_bio_size(mdev);
|
|
|
|
/* 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, &mdev->flags);
|
|
if (mdev->state.role != R_PRIMARY &&
|
|
drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
|
|
!drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND))
|
|
set_bit(USE_DEGR_WFC_T, &mdev->flags);
|
|
|
|
dd = drbd_determine_dev_size(mdev, 0);
|
|
if (dd == dev_size_error) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto force_diskless_dec;
|
|
} else if (dd == grew)
|
|
set_bit(RESYNC_AFTER_NEG, &mdev->flags);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) {
|
|
dev_info(DEV, "Assuming that all blocks are out of sync "
|
|
"(aka FullSync)\n");
|
|
if (drbd_bitmap_io(mdev, &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(mdev, &drbd_bm_read,
|
|
"read from attaching", BM_LOCKED_MASK)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
|
|
drbd_suspend_al(mdev); /* IO is still suspended here... */
|
|
|
|
spin_lock_irq(&mdev->tconn->req_lock);
|
|
os = drbd_read_state(mdev);
|
|
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(mdev->ldev, MDF_CONSISTENT)) {
|
|
if (drbd_md_test_flag(mdev->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(mdev->ldev, MDF_PEER_OUT_DATED))
|
|
ns.pdsk = D_OUTDATED;
|
|
|
|
rcu_read_lock();
|
|
if (ns.disk == D_CONSISTENT &&
|
|
(ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE))
|
|
ns.disk = D_UP_TO_DATE;
|
|
rcu_read_unlock();
|
|
|
|
/* 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. */
|
|
|
|
/* In case we are C_CONNECTED postpone any decision on the new disk
|
|
state after the negotiation phase. */
|
|
if (mdev->state.conn == C_CONNECTED) {
|
|
mdev->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(mdev->p_uuid);
|
|
mdev->p_uuid = NULL;
|
|
}
|
|
|
|
rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->tconn->req_lock);
|
|
|
|
if (rv < SS_SUCCESS)
|
|
goto force_diskless_dec;
|
|
|
|
mod_timer(&mdev->request_timer, jiffies + HZ);
|
|
|
|
if (mdev->state.role == R_PRIMARY)
|
|
mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
|
else
|
|
mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
|
|
|
|
drbd_md_mark_dirty(mdev);
|
|
drbd_md_sync(mdev);
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
put_ldev(mdev);
|
|
conn_reconfig_done(mdev->tconn);
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
|
|
force_diskless_dec:
|
|
put_ldev(mdev);
|
|
force_diskless:
|
|
drbd_force_state(mdev, NS(disk, D_DISKLESS));
|
|
drbd_md_sync(mdev);
|
|
fail:
|
|
conn_reconfig_done(mdev->tconn);
|
|
if (nbc) {
|
|
if (nbc->backing_bdev)
|
|
blkdev_put(nbc->backing_bdev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
if (nbc->md_bdev)
|
|
blkdev_put(nbc->md_bdev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
kfree(nbc);
|
|
}
|
|
kfree(new_disk_conf);
|
|
lc_destroy(resync_lru);
|
|
kfree(new_plan);
|
|
|
|
finish:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int adm_detach(struct drbd_conf *mdev, int force)
|
|
{
|
|
enum drbd_state_rv retcode;
|
|
int ret;
|
|
|
|
if (force) {
|
|
drbd_force_state(mdev, NS(disk, D_FAILED));
|
|
retcode = SS_SUCCESS;
|
|
goto out;
|
|
}
|
|
|
|
drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
|
|
retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
|
|
/* D_FAILED will transition to DISKLESS. */
|
|
ret = wait_event_interruptible(mdev->misc_wait,
|
|
mdev->state.disk != D_FAILED);
|
|
drbd_resume_io(mdev);
|
|
if ((int)retcode == (int)SS_IS_DISKLESS)
|
|
retcode = SS_NOTHING_TO_DO;
|
|
if (ret)
|
|
retcode = ERR_INTR;
|
|
out:
|
|
return retcode;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct detach_parms parms = { };
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(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(from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
retcode = adm_detach(adm_ctx.mdev, parms.force_detach);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static bool conn_resync_running(struct drbd_tconn *tconn)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
bool rv = false;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
if (mdev->state.conn == C_SYNC_SOURCE ||
|
|
mdev->state.conn == C_SYNC_TARGET ||
|
|
mdev->state.conn == C_PAUSED_SYNC_S ||
|
|
mdev->state.conn == C_PAUSED_SYNC_T) {
|
|
rv = true;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
static bool conn_ov_running(struct drbd_tconn *tconn)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
bool rv = false;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
if (mdev->state.conn == C_VERIFY_S ||
|
|
mdev->state.conn == C_VERIFY_T) {
|
|
rv = true;
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
_check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
int i;
|
|
|
|
if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) {
|
|
if (new_conf->wire_protocol != old_conf->wire_protocol)
|
|
return ERR_NEED_APV_100;
|
|
|
|
if (new_conf->two_primaries != old_conf->two_primaries)
|
|
return ERR_NEED_APV_100;
|
|
|
|
if (!new_conf->integrity_alg != !old_conf->integrity_alg)
|
|
return ERR_NEED_APV_100;
|
|
|
|
if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg))
|
|
return ERR_NEED_APV_100;
|
|
}
|
|
|
|
if (!new_conf->two_primaries &&
|
|
conn_highest_role(tconn) == R_PRIMARY &&
|
|
conn_highest_peer(tconn) == R_PRIMARY)
|
|
return ERR_NEED_ALLOW_TWO_PRI;
|
|
|
|
if (new_conf->two_primaries &&
|
|
(new_conf->wire_protocol != DRBD_PROT_C))
|
|
return ERR_NOT_PROTO_C;
|
|
|
|
idr_for_each_entry(&tconn->volumes, mdev, i) {
|
|
if (get_ldev(mdev)) {
|
|
enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
|
|
put_ldev(mdev);
|
|
if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
|
|
return ERR_STONITH_AND_PROT_A;
|
|
}
|
|
if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data)
|
|
return ERR_DISCARD;
|
|
}
|
|
|
|
if (new_conf->on_congestion != OC_BLOCK && new_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_tconn *tconn, struct net_conf *new_conf)
|
|
{
|
|
static enum drbd_ret_code rv;
|
|
struct drbd_conf *mdev;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf);
|
|
rcu_read_unlock();
|
|
|
|
/* tconn->volumes protected by genl_lock() here */
|
|
idr_for_each_entry(&tconn->volumes, mdev, i) {
|
|
if (!mdev->bitmap) {
|
|
if(drbd_bm_init(mdev))
|
|
return ERR_NOMEM;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
struct crypto {
|
|
struct crypto_hash *verify_tfm;
|
|
struct crypto_hash *csums_tfm;
|
|
struct crypto_hash *cram_hmac_tfm;
|
|
struct crypto_hash *integrity_tfm;
|
|
void *int_dig_in;
|
|
void *int_dig_vv;
|
|
};
|
|
|
|
static int
|
|
alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg)
|
|
{
|
|
if (!tfm_name[0])
|
|
return NO_ERROR;
|
|
|
|
*tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC);
|
|
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_conf)
|
|
{
|
|
char hmac_name[CRYPTO_MAX_ALG_NAME];
|
|
enum drbd_ret_code rv;
|
|
int hash_size;
|
|
|
|
rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg,
|
|
ERR_CSUMS_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg,
|
|
ERR_VERIFY_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg,
|
|
ERR_INTEGRITY_ALG);
|
|
if (rv != NO_ERROR)
|
|
return rv;
|
|
if (new_conf->cram_hmac_alg[0] != 0) {
|
|
snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
|
|
new_conf->cram_hmac_alg);
|
|
|
|
rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name,
|
|
ERR_AUTH_ALG);
|
|
}
|
|
if (crypto->integrity_tfm) {
|
|
hash_size = crypto_hash_digestsize(crypto->integrity_tfm);
|
|
crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL);
|
|
if (!crypto->int_dig_in)
|
|
return ERR_NOMEM;
|
|
crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
|
|
if (!crypto->int_dig_vv)
|
|
return ERR_NOMEM;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void free_crypto(struct crypto *crypto)
|
|
{
|
|
kfree(crypto->int_dig_in);
|
|
kfree(crypto->int_dig_vv);
|
|
crypto_free_hash(crypto->cram_hmac_tfm);
|
|
crypto_free_hash(crypto->integrity_tfm);
|
|
crypto_free_hash(crypto->csums_tfm);
|
|
crypto_free_hash(crypto->verify_tfm);
|
|
}
|
|
|
|
int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct drbd_tconn *tconn;
|
|
struct net_conf *old_conf, *new_conf = NULL;
|
|
int err;
|
|
int ovr; /* online verify running */
|
|
int rsr; /* re-sync running */
|
|
struct crypto crypto = { };
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
tconn = adm_ctx.tconn;
|
|
|
|
new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
|
|
if (!new_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto out;
|
|
}
|
|
|
|
conn_reconfig_start(tconn);
|
|
|
|
mutex_lock(&tconn->data.mutex);
|
|
mutex_lock(&tconn->conf_update);
|
|
old_conf = tconn->net_conf;
|
|
|
|
if (!old_conf) {
|
|
drbd_msg_put_info("net conf missing, try connect");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto fail;
|
|
}
|
|
|
|
*new_conf = *old_conf;
|
|
if (should_set_defaults(info))
|
|
set_net_conf_defaults(new_conf);
|
|
|
|
err = net_conf_from_attrs_for_change(new_conf, info);
|
|
if (err && err != -ENOMSG) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
retcode = check_net_options(tconn, new_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
/* re-sync running */
|
|
rsr = conn_resync_running(tconn);
|
|
if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
|
|
retcode = ERR_CSUMS_RESYNC_RUNNING;
|
|
goto fail;
|
|
}
|
|
|
|
/* online verify running */
|
|
ovr = conn_ov_running(tconn);
|
|
if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
|
|
retcode = ERR_VERIFY_RUNNING;
|
|
goto fail;
|
|
}
|
|
|
|
retcode = alloc_crypto(&crypto, new_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
rcu_assign_pointer(tconn->net_conf, new_conf);
|
|
|
|
if (!rsr) {
|
|
crypto_free_hash(tconn->csums_tfm);
|
|
tconn->csums_tfm = crypto.csums_tfm;
|
|
crypto.csums_tfm = NULL;
|
|
}
|
|
if (!ovr) {
|
|
crypto_free_hash(tconn->verify_tfm);
|
|
tconn->verify_tfm = crypto.verify_tfm;
|
|
crypto.verify_tfm = NULL;
|
|
}
|
|
|
|
kfree(tconn->int_dig_in);
|
|
tconn->int_dig_in = crypto.int_dig_in;
|
|
kfree(tconn->int_dig_vv);
|
|
tconn->int_dig_vv = crypto.int_dig_vv;
|
|
crypto_free_hash(tconn->integrity_tfm);
|
|
tconn->integrity_tfm = crypto.integrity_tfm;
|
|
if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100)
|
|
/* Do this without trying to take tconn->data.mutex again. */
|
|
__drbd_send_protocol(tconn, P_PROTOCOL_UPDATE);
|
|
|
|
crypto_free_hash(tconn->cram_hmac_tfm);
|
|
tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
|
|
|
|
mutex_unlock(&tconn->conf_update);
|
|
mutex_unlock(&tconn->data.mutex);
|
|
synchronize_rcu();
|
|
kfree(old_conf);
|
|
|
|
if (tconn->cstate >= C_WF_REPORT_PARAMS)
|
|
drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn)));
|
|
|
|
goto done;
|
|
|
|
fail:
|
|
mutex_unlock(&tconn->conf_update);
|
|
mutex_unlock(&tconn->data.mutex);
|
|
free_crypto(&crypto);
|
|
kfree(new_conf);
|
|
done:
|
|
conn_reconfig_done(tconn);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
struct net_conf *old_conf, *new_conf = NULL;
|
|
struct crypto crypto = { };
|
|
struct drbd_tconn *tconn;
|
|
enum drbd_ret_code retcode;
|
|
int i;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(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("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 */
|
|
list_for_each_entry(tconn, &drbd_tconns, all_tconn) {
|
|
if (nla_len(adm_ctx.my_addr) == tconn->my_addr_len &&
|
|
!memcmp(nla_data(adm_ctx.my_addr), &tconn->my_addr, tconn->my_addr_len)) {
|
|
retcode = ERR_LOCAL_ADDR;
|
|
goto out;
|
|
}
|
|
|
|
if (nla_len(adm_ctx.peer_addr) == tconn->peer_addr_len &&
|
|
!memcmp(nla_data(adm_ctx.peer_addr), &tconn->peer_addr, tconn->peer_addr_len)) {
|
|
retcode = ERR_PEER_ADDR;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
tconn = adm_ctx.tconn;
|
|
conn_reconfig_start(tconn);
|
|
|
|
if (tconn->cstate > C_STANDALONE) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
goto fail;
|
|
}
|
|
|
|
/* allocation not in the IO path, cqueue thread context */
|
|
new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL);
|
|
if (!new_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
set_net_conf_defaults(new_conf);
|
|
|
|
err = net_conf_from_attrs(new_conf, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
retcode = check_net_options(tconn, new_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
retcode = alloc_crypto(&crypto, new_conf);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
|
|
|
|
conn_flush_workqueue(tconn);
|
|
|
|
mutex_lock(&tconn->conf_update);
|
|
old_conf = tconn->net_conf;
|
|
if (old_conf) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
mutex_unlock(&tconn->conf_update);
|
|
goto fail;
|
|
}
|
|
rcu_assign_pointer(tconn->net_conf, new_conf);
|
|
|
|
conn_free_crypto(tconn);
|
|
tconn->int_dig_in = crypto.int_dig_in;
|
|
tconn->int_dig_vv = crypto.int_dig_vv;
|
|
tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
|
|
tconn->integrity_tfm = crypto.integrity_tfm;
|
|
tconn->csums_tfm = crypto.csums_tfm;
|
|
tconn->verify_tfm = crypto.verify_tfm;
|
|
|
|
tconn->my_addr_len = nla_len(adm_ctx.my_addr);
|
|
memcpy(&tconn->my_addr, nla_data(adm_ctx.my_addr), tconn->my_addr_len);
|
|
tconn->peer_addr_len = nla_len(adm_ctx.peer_addr);
|
|
memcpy(&tconn->peer_addr, nla_data(adm_ctx.peer_addr), tconn->peer_addr_len);
|
|
|
|
mutex_unlock(&tconn->conf_update);
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, i) {
|
|
mdev->send_cnt = 0;
|
|
mdev->recv_cnt = 0;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE);
|
|
|
|
conn_reconfig_done(tconn);
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
|
|
fail:
|
|
free_crypto(&crypto);
|
|
kfree(new_conf);
|
|
|
|
conn_reconfig_done(tconn);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
rv = conn_request_state(tconn, 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(tconn, NS2(conn, C_DISCONNECTING,
|
|
pdsk, D_OUTDATED), CS_VERBOSE);
|
|
break;
|
|
case SS_CW_FAILED_BY_PEER:
|
|
/* The peer probably wants to see us outdated. */
|
|
rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING,
|
|
disk, D_OUTDATED), 0);
|
|
if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) {
|
|
rv = conn_request_state(tconn, 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(&adm_ctx.tconn->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 drbdd_init() returned. Typically, we should be
|
|
* C_STANDALONE already, now, and this becomes a no-op.
|
|
*/
|
|
rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE),
|
|
CS_VERBOSE | CS_HARD);
|
|
if (rv2 < SS_SUCCESS)
|
|
conn_err(tconn,
|
|
"unexpected rv2=%d in conn_try_disconnect()\n",
|
|
rv2);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct disconnect_parms parms;
|
|
struct drbd_tconn *tconn;
|
|
enum drbd_state_rv rv;
|
|
enum drbd_ret_code retcode;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
tconn = adm_ctx.tconn;
|
|
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(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
rv = conn_try_disconnect(tconn, parms.force_disconnect);
|
|
if (rv < SS_SUCCESS)
|
|
retcode = rv; /* FIXME: Type mismatch. */
|
|
else
|
|
retcode = NO_ERROR;
|
|
fail:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
void resync_after_online_grow(struct drbd_conf *mdev)
|
|
{
|
|
int iass; /* I am sync source */
|
|
|
|
dev_info(DEV, "Resync of new storage after online grow\n");
|
|
if (mdev->state.role != mdev->state.peer)
|
|
iass = (mdev->state.role == R_PRIMARY);
|
|
else
|
|
iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags);
|
|
|
|
if (iass)
|
|
drbd_start_resync(mdev, C_SYNC_SOURCE);
|
|
else
|
|
_drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
|
|
}
|
|
|
|
int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
|
|
struct resize_parms rs;
|
|
struct drbd_conf *mdev;
|
|
enum drbd_ret_code retcode;
|
|
enum determine_dev_size dd;
|
|
enum dds_flags ddsf;
|
|
sector_t u_size;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
memset(&rs, 0, sizeof(struct resize_parms));
|
|
if (info->attrs[DRBD_NLA_RESIZE_PARMS]) {
|
|
err = resize_parms_from_attrs(&rs, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
mdev = adm_ctx.mdev;
|
|
if (mdev->state.conn > C_CONNECTED) {
|
|
retcode = ERR_RESIZE_RESYNC;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.role == R_SECONDARY &&
|
|
mdev->state.peer == R_SECONDARY) {
|
|
retcode = ERR_NO_PRIMARY;
|
|
goto fail;
|
|
}
|
|
|
|
if (!get_ldev(mdev)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto fail;
|
|
}
|
|
|
|
if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) {
|
|
retcode = ERR_NEED_APV_93;
|
|
goto fail;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
u_size = rcu_dereference(mdev->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;
|
|
}
|
|
}
|
|
|
|
if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev))
|
|
mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev);
|
|
|
|
if (new_disk_conf) {
|
|
mutex_lock(&mdev->tconn->conf_update);
|
|
old_disk_conf = mdev->ldev->disk_conf;
|
|
*new_disk_conf = *old_disk_conf;
|
|
new_disk_conf->disk_size = (sector_t)rs.resize_size;
|
|
rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
|
|
mutex_unlock(&mdev->tconn->conf_update);
|
|
synchronize_rcu();
|
|
kfree(old_disk_conf);
|
|
}
|
|
|
|
ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
|
|
dd = drbd_determine_dev_size(mdev, ddsf);
|
|
drbd_md_sync(mdev);
|
|
put_ldev(mdev);
|
|
if (dd == dev_size_error) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.conn == C_CONNECTED) {
|
|
if (dd == grew)
|
|
set_bit(RESIZE_PENDING, &mdev->flags);
|
|
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_sizes(mdev, 1, ddsf);
|
|
}
|
|
|
|
fail:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct drbd_tconn *tconn;
|
|
struct res_opts res_opts;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
tconn = adm_ctx.tconn;
|
|
|
|
res_opts = tconn->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(from_attrs_err_to_txt(err));
|
|
goto fail;
|
|
}
|
|
|
|
err = set_resource_options(tconn, &res_opts);
|
|
if (err) {
|
|
retcode = ERR_INVALID_REQUEST;
|
|
if (err == -ENOMEM)
|
|
retcode = ERR_NOMEM;
|
|
}
|
|
|
|
fail:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
|
|
/* If there is still bitmap IO pending, probably because of a previous
|
|
* resync just being finished, wait for it before requesting a new resync. */
|
|
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
|
|
|
|
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED);
|
|
|
|
if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION)
|
|
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
|
|
|
|
while (retcode == SS_NEED_CONNECTION) {
|
|
spin_lock_irq(&mdev->tconn->req_lock);
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->tconn->req_lock);
|
|
|
|
if (retcode != SS_NEED_CONNECTION)
|
|
break;
|
|
|
|
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
|
|
}
|
|
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_bmio_set_susp_al(struct drbd_conf *mdev)
|
|
{
|
|
int rv;
|
|
|
|
rv = drbd_bmio_set_n_write(mdev);
|
|
drbd_suspend_al(mdev);
|
|
return rv;
|
|
}
|
|
|
|
static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info,
|
|
union drbd_state mask, union drbd_state val)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
retcode = drbd_request_state(adm_ctx.mdev, mask, val);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S));
|
|
}
|
|
|
|
int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
|
|
retcode = ERR_PAUSE_IS_SET;
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
union drbd_dev_state s;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
|
|
s = adm_ctx.mdev->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;
|
|
}
|
|
}
|
|
|
|
out:
|
|
drbd_adm_finish(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_conf *mdev;
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
if (test_bit(NEW_CUR_UUID, &mdev->flags)) {
|
|
drbd_uuid_new_current(mdev);
|
|
clear_bit(NEW_CUR_UUID, &mdev->flags);
|
|
}
|
|
drbd_suspend_io(mdev);
|
|
retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
|
|
if (retcode == SS_SUCCESS) {
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
tl_clear(mdev->tconn);
|
|
if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED)
|
|
tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO);
|
|
}
|
|
drbd_resume_io(mdev);
|
|
|
|
out:
|
|
drbd_adm_finish(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));
|
|
}
|
|
|
|
int nla_put_drbd_cfg_context(struct sk_buff *skb, struct drbd_tconn *tconn, unsigned vnr)
|
|
{
|
|
struct nlattr *nla;
|
|
nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT);
|
|
if (!nla)
|
|
goto nla_put_failure;
|
|
if (vnr != VOLUME_UNSPECIFIED)
|
|
NLA_PUT_U32(skb, T_ctx_volume, vnr);
|
|
NLA_PUT_STRING(skb, T_ctx_resource_name, tconn->name);
|
|
if (tconn->my_addr_len)
|
|
NLA_PUT(skb, T_ctx_my_addr, tconn->my_addr_len, &tconn->my_addr);
|
|
if (tconn->peer_addr_len)
|
|
NLA_PUT(skb, T_ctx_peer_addr, tconn->peer_addr_len, &tconn->peer_addr);
|
|
nla_nest_end(skb, nla);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
if (nla)
|
|
nla_nest_cancel(skb, nla);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
|
|
const struct sib_info *sib)
|
|
{
|
|
struct state_info *si = NULL; /* for sizeof(si->member); */
|
|
struct net_conf *nc;
|
|
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(mdev);
|
|
|
|
/* We need to add connection name and volume number information still.
|
|
* Minor number is in drbd_genlmsghdr. */
|
|
if (nla_put_drbd_cfg_context(skb, mdev->tconn, mdev->vnr))
|
|
goto nla_put_failure;
|
|
|
|
if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive))
|
|
goto nla_put_failure;
|
|
|
|
rcu_read_lock();
|
|
if (got_ldev)
|
|
if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive))
|
|
goto nla_put_failure;
|
|
|
|
nc = rcu_dereference(mdev->tconn->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(skb, DRBD_NLA_STATE_INFO);
|
|
if (!nla)
|
|
goto nla_put_failure;
|
|
NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY);
|
|
NLA_PUT_U32(skb, T_current_state, mdev->state.i);
|
|
NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid);
|
|
NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev));
|
|
|
|
if (got_ldev) {
|
|
NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags);
|
|
NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid);
|
|
NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev));
|
|
NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev));
|
|
if (C_SYNC_SOURCE <= mdev->state.conn &&
|
|
C_PAUSED_SYNC_T >= mdev->state.conn) {
|
|
NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total);
|
|
NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed);
|
|
}
|
|
}
|
|
|
|
if (sib) {
|
|
switch(sib->sib_reason) {
|
|
case SIB_SYNC_PROGRESS:
|
|
case SIB_GET_STATUS_REPLY:
|
|
break;
|
|
case SIB_STATE_CHANGE:
|
|
NLA_PUT_U32(skb, T_prev_state, sib->os.i);
|
|
NLA_PUT_U32(skb, T_new_state, sib->ns.i);
|
|
break;
|
|
case SIB_HELPER_POST:
|
|
NLA_PUT_U32(skb,
|
|
T_helper_exit_code, sib->helper_exit_code);
|
|
/* fall through */
|
|
case SIB_HELPER_PRE:
|
|
NLA_PUT_STRING(skb, T_helper, sib->helper_name);
|
|
break;
|
|
}
|
|
}
|
|
nla_nest_end(skb, nla);
|
|
|
|
if (0)
|
|
nla_put_failure:
|
|
err = -EMSGSIZE;
|
|
if (got_ldev)
|
|
put_ldev(mdev);
|
|
return err;
|
|
}
|
|
|
|
int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(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.mdev, NULL);
|
|
if (err) {
|
|
nlmsg_free(adm_ctx.reply_skb);
|
|
return err;
|
|
}
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
struct drbd_genlmsghdr *dh;
|
|
struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0];
|
|
struct drbd_tconn *tconn = NULL;
|
|
struct drbd_tconn *tmp;
|
|
unsigned volume = cb->args[1];
|
|
|
|
/* Open coded, deferred, iteration:
|
|
* list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) {
|
|
* idr_for_each_entry(&tconn->volumes, mdev, i) {
|
|
* ...
|
|
* }
|
|
* }
|
|
* where tconn 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 mdev won't disappear while
|
|
* we are looking at it, and revalidate our iterators
|
|
* on each iteration.
|
|
*/
|
|
|
|
/* synchronize with conn_create()/conn_destroy() */
|
|
rcu_read_lock();
|
|
/* revalidate iterator position */
|
|
list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) {
|
|
if (pos == NULL) {
|
|
/* first iteration */
|
|
pos = tmp;
|
|
tconn = pos;
|
|
break;
|
|
}
|
|
if (tmp == pos) {
|
|
tconn = pos;
|
|
break;
|
|
}
|
|
}
|
|
if (tconn) {
|
|
next_tconn:
|
|
mdev = idr_get_next(&tconn->volumes, &volume);
|
|
if (!mdev) {
|
|
/* No more volumes to dump on this tconn.
|
|
* Advance tconn iterator. */
|
|
pos = list_entry_rcu(tconn->all_tconn.next,
|
|
struct drbd_tconn, all_tconn);
|
|
/* Did we dump any volume on this tconn 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->all_tconn == &drbd_tconns || cb->args[2])
|
|
goto out;
|
|
volume = 0;
|
|
tconn = pos;
|
|
goto next_tconn;
|
|
}
|
|
}
|
|
|
|
dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, &drbd_genl_family,
|
|
NLM_F_MULTI, DRBD_ADM_GET_STATUS);
|
|
if (!dh)
|
|
goto out;
|
|
|
|
if (!mdev) {
|
|
/* This is a tconn without a single volume.
|
|
* Suprisingly enough, it may have a network
|
|
* configuration. */
|
|
struct net_conf *nc;
|
|
dh->minor = -1U;
|
|
dh->ret_code = NO_ERROR;
|
|
if (nla_put_drbd_cfg_context(skb, tconn, VOLUME_UNSPECIFIED))
|
|
goto cancel;
|
|
nc = rcu_dereference(tconn->net_conf);
|
|
if (nc && net_conf_to_skb(skb, nc, 1) != 0)
|
|
goto cancel;
|
|
goto done;
|
|
}
|
|
|
|
D_ASSERT(mdev->vnr == volume);
|
|
D_ASSERT(mdev->tconn == tconn);
|
|
|
|
dh->minor = mdev_to_minor(mdev);
|
|
dh->ret_code = NO_ERROR;
|
|
|
|
if (nla_put_status_info(skb, mdev, 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 == tconn) ? volume + 1 : 0;
|
|
|
|
/* No more tconns/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_tconn *tconn;
|
|
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);
|
|
tconn = conn_get_by_name(resource_name);
|
|
|
|
if (!tconn)
|
|
return -ENODEV;
|
|
|
|
kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */
|
|
|
|
/* prime iterators, and set "filter" mode mark:
|
|
* only dump this tconn. */
|
|
cb->args[0] = (long)tconn;
|
|
/* cb->args[1] = 0; passed in this way. */
|
|
cb->args[2] = (long)tconn;
|
|
|
|
dump:
|
|
return get_one_status(skb, cb);
|
|
}
|
|
|
|
int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct timeout_parms tp;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
tp.timeout_type =
|
|
adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
|
|
test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->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(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
if (info->attrs[DRBD_NLA_START_OV_PARMS]) {
|
|
/* resume from last known position, if possible */
|
|
struct start_ov_parms parms =
|
|
{ .ov_start_sector = mdev->ov_start_sector };
|
|
int err = start_ov_parms_from_attrs(&parms, info);
|
|
if (err) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
drbd_msg_put_info(from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
/* w_make_ov_request expects position to be aligned */
|
|
mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT;
|
|
}
|
|
/* If there is still bitmap IO pending, e.g. previous resync or verify
|
|
* just being finished, wait for it before requesting a new resync. */
|
|
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
|
|
retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S));
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
enum drbd_ret_code retcode;
|
|
int skip_initial_sync = 0;
|
|
int err;
|
|
struct new_c_uuid_parms args;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out_nolock;
|
|
|
|
mdev = adm_ctx.mdev;
|
|
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(from_attrs_err_to_txt(err));
|
|
goto out_nolock;
|
|
}
|
|
}
|
|
|
|
mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */
|
|
|
|
if (!get_ldev(mdev)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
/* this is "skip initial sync", assume to be clean */
|
|
if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 &&
|
|
mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
|
|
dev_info(DEV, "Preparing to skip initial sync\n");
|
|
skip_initial_sync = 1;
|
|
} else if (mdev->state.conn != C_STANDALONE) {
|
|
retcode = ERR_CONNECTED;
|
|
goto out_dec;
|
|
}
|
|
|
|
drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */
|
|
drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */
|
|
|
|
if (args.clear_bm) {
|
|
err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write,
|
|
"clear_n_write from new_c_uuid", BM_LOCKED_MASK);
|
|
if (err) {
|
|
dev_err(DEV, "Writing bitmap failed with %d\n",err);
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
if (skip_initial_sync) {
|
|
drbd_send_uuids_skip_initial_sync(mdev);
|
|
_drbd_uuid_set(mdev, UI_BITMAP, 0);
|
|
drbd_print_uuids(mdev, "cleared bitmap UUID");
|
|
spin_lock_irq(&mdev->tconn->req_lock);
|
|
_drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
|
|
CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->tconn->req_lock);
|
|
}
|
|
}
|
|
|
|
drbd_md_sync(mdev);
|
|
out_dec:
|
|
put_ldev(mdev);
|
|
out:
|
|
mutex_unlock(mdev->state_mutex);
|
|
out_nolock:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_ret_code
|
|
drbd_check_resource_name(const char *name)
|
|
{
|
|
if (!name || !name[0]) {
|
|
drbd_msg_put_info("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("invalid resource name");
|
|
return ERR_INVALID_REQUEST;
|
|
}
|
|
return NO_ERROR;
|
|
}
|
|
|
|
int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
struct res_opts res_opts;
|
|
int err;
|
|
|
|
retcode = drbd_adm_prepare(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(from_attrs_err_to_txt(err));
|
|
goto out;
|
|
}
|
|
|
|
retcode = drbd_check_resource_name(adm_ctx.resource_name);
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (adm_ctx.tconn) {
|
|
if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) {
|
|
retcode = ERR_INVALID_REQUEST;
|
|
drbd_msg_put_info("resource exists");
|
|
}
|
|
/* else: still NO_ERROR */
|
|
goto out;
|
|
}
|
|
|
|
if (!conn_create(adm_ctx.resource_name, &res_opts))
|
|
retcode = ERR_NOMEM;
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct drbd_genlmsghdr *dh = info->userhdr;
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(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("requested minor out of range");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto out;
|
|
}
|
|
if (adm_ctx.volume > DRBD_VOLUME_MAX) {
|
|
drbd_msg_put_info("requested volume id out of range");
|
|
retcode = ERR_INVALID_REQUEST;
|
|
goto out;
|
|
}
|
|
|
|
/* drbd_adm_prepare made sure already
|
|
* that mdev->tconn and mdev->vnr match the request. */
|
|
if (adm_ctx.mdev) {
|
|
if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
|
|
retcode = ERR_MINOR_EXISTS;
|
|
/* else: still NO_ERROR */
|
|
goto out;
|
|
}
|
|
|
|
retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev)
|
|
{
|
|
if (mdev->state.disk == D_DISKLESS &&
|
|
/* no need to be mdev->state.conn == C_STANDALONE &&
|
|
* we may want to delete a minor from a live replication group.
|
|
*/
|
|
mdev->state.role == R_SECONDARY) {
|
|
_drbd_request_state(mdev, NS(conn, C_WF_REPORT_PARAMS),
|
|
CS_VERBOSE + CS_WAIT_COMPLETE);
|
|
idr_remove(&mdev->tconn->volumes, mdev->vnr);
|
|
idr_remove(&minors, mdev_to_minor(mdev));
|
|
del_gendisk(mdev->vdisk);
|
|
synchronize_rcu();
|
|
kref_put(&mdev->kref, &drbd_minor_destroy);
|
|
return NO_ERROR;
|
|
} else
|
|
return ERR_MINOR_CONFIGURED;
|
|
}
|
|
|
|
int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
retcode = adm_delete_minor(adm_ctx.mdev);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
|
|
struct drbd_conf *mdev;
|
|
unsigned i;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, 0);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (!adm_ctx.tconn) {
|
|
retcode = ERR_RES_NOT_KNOWN;
|
|
goto out;
|
|
}
|
|
|
|
/* demote */
|
|
idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
|
|
retcode = drbd_set_role(mdev, R_SECONDARY, 0);
|
|
if (retcode < SS_SUCCESS) {
|
|
drbd_msg_put_info("failed to demote");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
retcode = conn_try_disconnect(adm_ctx.tconn, 0);
|
|
if (retcode < SS_SUCCESS) {
|
|
drbd_msg_put_info("failed to disconnect");
|
|
goto out;
|
|
}
|
|
|
|
/* detach */
|
|
idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
|
|
retcode = adm_detach(mdev, 0);
|
|
if (retcode < SS_SUCCESS) {
|
|
drbd_msg_put_info("failed to detach");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* If we reach this, all volumes (of this tconn) are Secondary,
|
|
* Disconnected, Diskless, aka Unconfigured. Make sure all threads have
|
|
* actually stopped, state handling only does drbd_thread_stop_nowait(). */
|
|
drbd_thread_stop(&adm_ctx.tconn->worker);
|
|
|
|
/* Now, nothing can fail anymore */
|
|
|
|
/* delete volumes */
|
|
idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
|
|
retcode = adm_delete_minor(mdev);
|
|
if (retcode != NO_ERROR) {
|
|
/* "can not happen" */
|
|
drbd_msg_put_info("failed to delete volume");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* delete connection */
|
|
if (conn_lowest_minor(adm_ctx.tconn) < 0) {
|
|
list_del_rcu(&adm_ctx.tconn->all_tconn);
|
|
synchronize_rcu();
|
|
kref_put(&adm_ctx.tconn->kref, &conn_destroy);
|
|
|
|
retcode = NO_ERROR;
|
|
} else {
|
|
/* "can not happen" */
|
|
retcode = ERR_RES_IN_USE;
|
|
drbd_msg_put_info("failed to delete connection");
|
|
}
|
|
goto out;
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
|
|
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
|
|
if (!adm_ctx.reply_skb)
|
|
return retcode;
|
|
if (retcode != NO_ERROR)
|
|
goto out;
|
|
|
|
if (conn_lowest_minor(adm_ctx.tconn) < 0) {
|
|
list_del_rcu(&adm_ctx.tconn->all_tconn);
|
|
synchronize_rcu();
|
|
kref_put(&adm_ctx.tconn->kref, &conn_destroy);
|
|
|
|
retcode = NO_ERROR;
|
|
} else {
|
|
retcode = ERR_RES_IN_USE;
|
|
}
|
|
|
|
if (retcode == NO_ERROR)
|
|
drbd_thread_stop(&adm_ctx.tconn->worker);
|
|
out:
|
|
drbd_adm_finish(info, retcode);
|
|
return 0;
|
|
}
|
|
|
|
void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib)
|
|
{
|
|
static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */
|
|
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 = mdev_to_minor(mdev);
|
|
d_out->ret_code = NO_ERROR;
|
|
|
|
if (nla_put_status_info(msg, mdev, sib))
|
|
goto nla_put_failure;
|
|
genlmsg_end(msg, d_out);
|
|
err = drbd_genl_multicast_events(msg, 0);
|
|
/* msg has been consumed or freed in netlink_broadcast() */
|
|
if (err && err != -ESRCH)
|
|
goto failed;
|
|
|
|
return;
|
|
|
|
nla_put_failure:
|
|
nlmsg_free(msg);
|
|
failed:
|
|
dev_err(DEV, "Error %d while broadcasting event. "
|
|
"Event seq:%u sib_reason:%u\n",
|
|
err, seq, sib->sib_reason);
|
|
}
|