| /* |
| drbd_nl.c |
| |
| This file is part of DRBD by Philipp Reisner and Lars Ellenberg. |
| |
| Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. |
| Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. |
| Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. |
| |
| drbd is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| drbd is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with drbd; see the file COPYING. If not, write to |
| the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/drbd.h> |
| #include <linux/in.h> |
| #include <linux/fs.h> |
| #include <linux/file.h> |
| #include <linux/slab.h> |
| #include <linux/blkpg.h> |
| #include <linux/cpumask.h> |
| #include "drbd_int.h" |
| #include "drbd_req.h" |
| #include "drbd_wrappers.h" |
| #include <asm/unaligned.h> |
| #include <linux/drbd_limits.h> |
| #include <linux/kthread.h> |
| |
| #include <net/genetlink.h> |
| |
| /* .doit */ |
| // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); |
| // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); |
| |
| int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); |
| |
| int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
| |
| int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
| int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); |
| /* .dumpit */ |
| int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); |
| |
| #include <linux/drbd_genl_api.h> |
| #include "drbd_nla.h" |
| #include <linux/genl_magic_func.h> |
| |
| /* used blkdev_get_by_path, to claim our meta data device(s) */ |
| static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
| |
| /* Configuration is strictly serialized, because generic netlink message |
| * processing is strictly serialized by the genl_lock(). |
| * Which means we can use one static global drbd_config_context struct. |
| */ |
| static struct drbd_config_context { |
| /* assigned from drbd_genlmsghdr */ |
| unsigned int minor; |
| /* assigned from request attributes, if present */ |
| unsigned int volume; |
| #define VOLUME_UNSPECIFIED (-1U) |
| /* pointer into the request skb, |
| * limited lifetime! */ |
| char *resource_name; |
| struct nlattr *my_addr; |
| struct nlattr *peer_addr; |
| |
| /* reply buffer */ |
| struct sk_buff *reply_skb; |
| /* pointer into reply buffer */ |
| struct drbd_genlmsghdr *reply_dh; |
| /* resolved from attributes, if possible */ |
| struct drbd_conf *mdev; |
| struct drbd_tconn *tconn; |
| } adm_ctx; |
| |
| static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) |
| { |
| genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); |
| if (genlmsg_reply(skb, info)) |
| printk(KERN_ERR "drbd: error sending genl reply\n"); |
| } |
| |
| /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only |
| * reason it could fail was no space in skb, and there are 4k available. */ |
| int drbd_msg_put_info(const char *info) |
| { |
| struct sk_buff *skb = adm_ctx.reply_skb; |
| struct nlattr *nla; |
| int err = -EMSGSIZE; |
| |
| if (!info || !info[0]) |
| return 0; |
| |
| nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); |
| if (!nla) |
| return err; |
| |
| err = nla_put_string(skb, T_info_text, info); |
| if (err) { |
| nla_nest_cancel(skb, nla); |
| return err; |
| } else |
| nla_nest_end(skb, nla); |
| return 0; |
| } |
| |
| /* This would be a good candidate for a "pre_doit" hook, |
| * and per-family private info->pointers. |
| * But we need to stay compatible with older kernels. |
| * If it returns successfully, adm_ctx members are valid. |
| */ |
| #define DRBD_ADM_NEED_MINOR 1 |
| #define DRBD_ADM_NEED_RESOURCE 2 |
| #define DRBD_ADM_NEED_CONNECTION 4 |
| static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, |
| unsigned flags) |
| { |
| struct drbd_genlmsghdr *d_in = info->userhdr; |
| const u8 cmd = info->genlhdr->cmd; |
| int err; |
| |
| memset(&adm_ctx, 0, sizeof(adm_ctx)); |
| |
| /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ |
| if (cmd != DRBD_ADM_GET_STATUS |
| && security_netlink_recv(skb, CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| if (!adm_ctx.reply_skb) { |
| err = -ENOMEM; |
| goto fail; |
| } |
| |
| adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, |
| info, &drbd_genl_family, 0, cmd); |
| /* put of a few bytes into a fresh skb of >= 4k will always succeed. |
| * but anyways */ |
| if (!adm_ctx.reply_dh) { |
| err = -ENOMEM; |
| goto fail; |
| } |
| |
| adm_ctx.reply_dh->minor = d_in->minor; |
| adm_ctx.reply_dh->ret_code = NO_ERROR; |
| |
| adm_ctx.volume = VOLUME_UNSPECIFIED; |
| if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { |
| struct nlattr *nla; |
| /* parse and validate only */ |
| err = drbd_cfg_context_from_attrs(NULL, info); |
| if (err) |
| goto fail; |
| |
| /* It was present, and valid, |
| * copy it over to the reply skb. */ |
| err = nla_put_nohdr(adm_ctx.reply_skb, |
| info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, |
| info->attrs[DRBD_NLA_CFG_CONTEXT]); |
| if (err) |
| goto fail; |
| |
| /* and assign stuff to the global adm_ctx */ |
| nla = nested_attr_tb[__nla_type(T_ctx_volume)]; |
| if (nla) |
| adm_ctx.volume = nla_get_u32(nla); |
| nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
| if (nla) |
| adm_ctx.resource_name = nla_data(nla); |
| adm_ctx.my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)]; |
| adm_ctx.peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)]; |
| if ((adm_ctx.my_addr && |
| nla_len(adm_ctx.my_addr) > sizeof(adm_ctx.tconn->my_addr)) || |
| (adm_ctx.peer_addr && |
| nla_len(adm_ctx.peer_addr) > sizeof(adm_ctx.tconn->peer_addr))) { |
| err = -EINVAL; |
| goto fail; |
| } |
| } |
| |
| adm_ctx.minor = d_in->minor; |
| adm_ctx.mdev = minor_to_mdev(d_in->minor); |
| adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name); |
| |
| if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { |
| drbd_msg_put_info("unknown minor"); |
| return ERR_MINOR_INVALID; |
| } |
| if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_RESOURCE)) { |
| drbd_msg_put_info("unknown resource"); |
| return ERR_INVALID_REQUEST; |
| } |
| |
| if (flags & DRBD_ADM_NEED_CONNECTION) { |
| if (adm_ctx.tconn && !(flags & DRBD_ADM_NEED_RESOURCE)) { |
| drbd_msg_put_info("no resource name expected"); |
| return ERR_INVALID_REQUEST; |
| } |
| if (adm_ctx.mdev) { |
| drbd_msg_put_info("no minor number expected"); |
| return ERR_INVALID_REQUEST; |
| } |
| if (adm_ctx.my_addr && adm_ctx.peer_addr) |
| adm_ctx.tconn = conn_get_by_addrs(nla_data(adm_ctx.my_addr), |
| nla_len(adm_ctx.my_addr), |
| nla_data(adm_ctx.peer_addr), |
| nla_len(adm_ctx.peer_addr)); |
| if (!adm_ctx.tconn) { |
| drbd_msg_put_info("unknown connection"); |
| return ERR_INVALID_REQUEST; |
| } |
| } |
| |
| /* some more paranoia, if the request was over-determined */ |
| if (adm_ctx.mdev && adm_ctx.tconn && |
| adm_ctx.mdev->tconn != adm_ctx.tconn) { |
| pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n", |
| adm_ctx.minor, adm_ctx.resource_name, |
| adm_ctx.mdev->tconn->name); |
| drbd_msg_put_info("minor exists in different resource"); |
| return ERR_INVALID_REQUEST; |
| } |
| if (adm_ctx.mdev && |
| adm_ctx.volume != VOLUME_UNSPECIFIED && |
| adm_ctx.volume != adm_ctx.mdev->vnr) { |
| pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", |
| adm_ctx.minor, adm_ctx.volume, |
| adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); |
| drbd_msg_put_info("minor exists as different volume"); |
| return ERR_INVALID_REQUEST; |
| } |
| |
| return NO_ERROR; |
| |
| fail: |
| nlmsg_free(adm_ctx.reply_skb); |
| adm_ctx.reply_skb = NULL; |
| return err; |
| } |
| |
| static int drbd_adm_finish(struct genl_info *info, int retcode) |
| { |
| if (adm_ctx.tconn) { |
| kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
| adm_ctx.tconn = NULL; |
| } |
| |
| if (!adm_ctx.reply_skb) |
| return -ENOMEM; |
| |
| adm_ctx.reply_dh->ret_code = retcode; |
| drbd_adm_send_reply(adm_ctx.reply_skb, info); |
| return 0; |
| } |
| |
| static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
| { |
| char *afs; |
| |
| /* FIXME: A future version will not allow this case. */ |
| if (tconn->my_addr_len == 0 || tconn->peer_addr_len == 0) |
| return; |
| |
| switch (((struct sockaddr *)&tconn->peer_addr)->sa_family) { |
| case AF_INET6: |
| afs = "ipv6"; |
| snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
| &((struct sockaddr_in6 *)&tconn->peer_addr)->sin6_addr); |
| break; |
| case AF_INET: |
| afs = "ipv4"; |
| snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
| &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); |
| break; |
| default: |
| afs = "ssocks"; |
| snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
| &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); |
| } |
| snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
| } |
| |
| int drbd_khelper(struct drbd_conf *mdev, char *cmd) |
| { |
| char *envp[] = { "HOME=/", |
| "TERM=linux", |
| "PATH=/sbin:/usr/sbin:/bin:/usr/bin", |
| (char[20]) { }, /* address family */ |
| (char[60]) { }, /* address */ |
| NULL }; |
| char mb[12]; |
| char *argv[] = {usermode_helper, cmd, mb, NULL }; |
| struct drbd_tconn *tconn = mdev->tconn; |
| struct sib_info sib; |
| int ret; |
| |
| if (current == tconn->worker.task) |
| set_bit(CALLBACK_PENDING, &tconn->flags); |
| |
| snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); |
| setup_khelper_env(tconn, envp); |
| |
| /* The helper may take some time. |
| * write out any unsynced meta data changes now */ |
| drbd_md_sync(mdev); |
| |
| dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
| sib.sib_reason = SIB_HELPER_PRE; |
| sib.helper_name = cmd; |
| drbd_bcast_event(mdev, &sib); |
| ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
| if (ret) |
| dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", |
| usermode_helper, cmd, mb, |
| (ret >> 8) & 0xff, ret); |
| else |
| dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", |
| usermode_helper, cmd, mb, |
| (ret >> 8) & 0xff, ret); |
| sib.sib_reason = SIB_HELPER_POST; |
| sib.helper_exit_code = ret; |
| drbd_bcast_event(mdev, &sib); |
| |
| if (current == tconn->worker.task) |
| clear_bit(CALLBACK_PENDING, &tconn->flags); |
| |
| if (ret < 0) /* Ignore any ERRNOs we got. */ |
| ret = 0; |
| |
| return ret; |
| } |
| |
| static void conn_md_sync(struct drbd_tconn *tconn) |
| { |
| struct drbd_conf *mdev; |
| int vnr; |
| |
| rcu_read_lock(); |
| idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
| kref_get(&mdev->kref); |
| rcu_read_unlock(); |
| drbd_md_sync(mdev); |
| kref_put(&mdev->kref, &drbd_minor_destroy); |
| rcu_read_lock(); |
| } |
| rcu_read_unlock(); |
| } |
| |
| int conn_khelper(struct drbd_tconn *tconn, char *cmd) |
| { |
| char *envp[] = { "HOME=/", |
| "TERM=linux", |
| "PATH=/sbin:/usr/sbin:/bin:/usr/bin", |
| (char[20]) { }, /* address family */ |
| (char[60]) { }, /* address */ |
| NULL }; |
| char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; |
| int ret; |
| |
| setup_khelper_env(tconn, envp); |
| conn_md_sync(tconn); |
| |
| conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); |
| /* TODO: conn_bcast_event() ?? */ |
| |
| ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
| if (ret) |
| conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", |
| usermode_helper, cmd, tconn->name, |
| (ret >> 8) & 0xff, ret); |
| else |
| conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", |
| usermode_helper, cmd, tconn->name, |
| (ret >> 8) & 0xff, ret); |
| /* TODO: conn_bcast_event() ?? */ |
| |
| if (ret < 0) /* Ignore any ERRNOs we got. */ |
| 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; |
| int vnr; |
| |
| rcu_read_lock(); |
| idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
| if (get_ldev_if_state(mdev, D_CONSISTENT)) { |
| fp = max_t(enum drbd_fencing_p, fp, |
| 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 && !test_bit(STATE_SENT, &tconn->flags)) |
| _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); |
| |
| /* FIXME also wait for all pending P_BARRIER_ACK? */ |
| |
| 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_current_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, md_moved ? &drbd_bm_write_all : &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; |
| } |
| } |
| |
| drbd_suspend_io(mdev); |
| 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); |
| drbd_resume_io(mdev); |
| |
| 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); |
| |
| if (new_disk_conf->al_updates) |
| mdev->ldev->md.flags &= MDF_AL_DISABLED; |
| else |
| mdev->ldev->md.flags |= MDF_AL_DISABLED; |
| |
| drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); |
| |
| 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)); |
| |
| /* make sure there is no leftover from previous force-detach attempts */ |
| clear_bit(FORCE_DETACH, &mdev->flags); |
| |
| /* and no leftover from previously aborted resync or verify, either */ |
| mdev->rs_total = 0; |
| mdev->rs_failed = 0; |
| atomic_set(&mdev->rs_pending_cnt, 0); |
| |
| /* allocation not in the IO path, drbdsetup context */ |
| nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
| if (!nbc) { |
| retcode = ERR_NOMEM; |
| goto fail; |
| } |
| spin_lock_init(&nbc->md.uuid_lock); |
| |
| new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
| if (!new_disk_conf) { |
| retcode = ERR_NOMEM; |
| goto fail; |
| } |
| nbc->disk_conf = new_disk_conf; |
| |
| set_disk_conf_defaults(new_disk_conf); |
| err = disk_conf_from_attrs(new_disk_conf, info); |
| if (err) { |
| retcode = ERR_MANDATORY_TAG; |
| drbd_msg_put_info(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. */ |
| /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
| * We need a way to either ignore barrier acks for barriers sent before a device |
| * was attached, or a way to wait for all pending barrier acks to come in. |
| * As barriers are counted per resource, |
| * we'd need to suspend io on all devices of a resource. |
| */ |
| wait_event(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; |
| |
| drbd_bump_write_ordering(mdev->tconn, 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) || |
| (test_bit(CRASHED_PRIMARY, &mdev->flags) && |
| drbd_md_test_flag(mdev->ldev, MDF_AL_DISABLED))) { |
| 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; |
| |
| /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, |
| MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before |
| this point, because drbd_request_state() modifies these |
| flags. */ |
| |
| if (rcu_dereference(mdev->ldev->disk_conf)->al_updates) |
| mdev->ldev->md.flags &= MDF_AL_DISABLED; |
| else |
| mdev->ldev->md.flags |= MDF_AL_DISABLED; |
| |
| rcu_read_unlock(); |
| |
| /* In case we are C_CONNECTED postpone any decision on the new disk |
| state after the negotiation phase. */ |
| if (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) { |
| set_bit(FORCE_DETACH, &mdev->flags); |
| 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 */ |
| drbd_md_get_buffer(mdev); /* make sure there is no in-flight meta-data IO */ |
| retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
| drbd_md_put_buffer(mdev); |
| /* 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_IMPOSSIBLE; |
| } |
| |
| 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; |
| }; |
| |
| 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; |
| |
| 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); |
| } |
| |
| return rv; |
| } |
| |
| static void free_crypto(struct crypto *crypto) |
| { |
| 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; |
| } |
| |
| 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, drbdsetup / netlink process 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 && 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; |
| |
| 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->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(RESOLVE_CONFLICTS, &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_ldev; |
| } |
| |
| 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_ldev; |
| } |
| } |
| |
| 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; |
| |
| fail_ldev: |
| put_ldev(mdev); |
| goto fail; |
| } |
| |
| 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. |
| * Also wait for it's after_state_ch(). */ |
| drbd_suspend_io(mdev); |
| wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
| drbd_flush_workqueue(mdev); |
| |
| 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)); |
| } |
| drbd_resume_io(mdev); |
| |
| out: |
| drbd_adm_finish(info, retcode); |
| return 0; |
| } |
| |
| static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
| union drbd_state mask, union drbd_state val) |
| { |
| 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; |
| } |
| |
| 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; |
| } |
| |
| int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
| { |
| int retcode; /* drbd_ret_code, drbd_state_rv */ |
| struct drbd_conf *mdev; |
| |
| 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. |
| * Also wait for it's after_state_ch(). */ |
| drbd_suspend_io(mdev); |
| wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
| drbd_flush_workqueue(mdev); |
| |
| retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED); |
| if (retcode < SS_SUCCESS) { |
| if (retcode == SS_NEED_CONNECTION && mdev->state.role == R_PRIMARY) { |
| /* The peer will get a resync upon connect anyways. |
| * Just make that into a full resync. */ |
| retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT)); |
| if (retcode >= SS_SUCCESS) { |
| if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al, |
| "set_n_write from invalidate_peer", |
| BM_LOCKED_SET_ALLOWED)) |
| retcode = ERR_IO_MD_DISK; |
| } |
| } else |
| retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S)); |
| } |
| drbd_resume_io(mdev); |
| |
| out: |
| drbd_adm_finish(info, retcode); |
| return 0; |
| } |
| |
| 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)) |
| goto nla_put_failure; |
| if (nla_put_string(skb, T_ctx_resource_name, tconn->name)) |
| goto nla_put_failure; |
| if (tconn->my_addr_len && |
| nla_put(skb, T_ctx_my_addr, tconn->my_addr_len, &tconn->my_addr)) |
| goto nla_put_failure; |
| if (tconn->peer_addr_len && |
| nla_put(skb, T_ctx_peer_addr, tconn->peer_addr_len, &tconn->peer_addr)) |
| goto nla_put_failure; |
| nla_nest_end(skb, nla); |
| return 0; |
| |
| nla_put_failure: |
| if (nla) |
| nla_nest_cancel(skb, nla); |
| return -EMSGSIZE; |
| } |
| |
| 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; |
| if (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)) || |
| nla_put_u64(skb, T_send_cnt, mdev->send_cnt) || |
| nla_put_u64(skb, T_recv_cnt, mdev->recv_cnt) || |
| nla_put_u64(skb, T_read_cnt, mdev->read_cnt) || |
| nla_put_u64(skb, T_writ_cnt, mdev->writ_cnt) || |
| nla_put_u64(skb, T_al_writ_cnt, mdev->al_writ_cnt) || |
| nla_put_u64(skb, T_bm_writ_cnt, mdev->bm_writ_cnt) || |
| nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&mdev->ap_bio_cnt)) || |
| nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&mdev->ap_pending_cnt)) || |
| nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&mdev->rs_pending_cnt))) |
| goto nla_put_failure; |
| |
| if (got_ldev) { |
| int err; |
| |
| spin_lock_irq(&mdev->ldev->md.uuid_lock); |
| err = nla_put(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); |
| spin_unlock_irq(&mdev->ldev->md.uuid_lock); |
| |
| if (err) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, T_disk_flags, mdev->ldev->md.flags) || |
| nla_put_u64(skb, T_bits_total, drbd_bm_bits(mdev)) || |
| nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(mdev))) |
| goto nla_put_failure; |
| if (C_SYNC_SOURCE <= mdev->state.conn && |
| C_PAUSED_SYNC_T >= mdev->state.conn) { |
| if (nla_put_u64(skb, T_bits_rs_total, mdev->rs_total) || |
| nla_put_u64(skb, T_bits_rs_failed, mdev->rs_failed)) |
| goto nla_put_failure; |
| } |
| } |
| |
| if (sib) { |
| switch(sib->sib_reason) { |
| case SIB_SYNC_PROGRESS: |
| case SIB_GET_STATUS_REPLY: |
| break; |
| case SIB_STATE_CHANGE: |
| if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
| nla_put_u32(skb, T_new_state, sib->ns.i)) |
| goto nla_put_failure; |
| break; |
| case SIB_HELPER_POST: |
| if (nla_put_u32(skb, T_helper_exit_code, |
| sib->helper_exit_code)) |
| goto nla_put_failure; |
| /* fall through */ |
| case SIB_HELPER_PRE: |
| if (nla_put_string(skb, T_helper, sib->helper_name)) |
| goto nla_put_failure; |
| break; |
| } |
| } |
| nla_nest_end(skb, nla); |
| |
| if (0) |
| nla_put_failure: |
| err = -EMSGSIZE; |
| if (got_ldev) |
| put_ldev(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; |
| struct start_ov_parms parms; |
| |
| 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; |
| |
| /* resume from last known position, if possible */ |
| parms.ov_start_sector = mdev->ov_start_sector; |
| parms.ov_stop_sector = ULLONG_MAX; |
| if (info->attrs[DRBD_NLA_START_OV_PARMS]) { |
| int err = start_ov_parms_from_attrs(&parms, info); |
| if (err) { |
| retcode = ERR_MANDATORY_TAG; |
| drbd_msg_put_info(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-1); |
| mdev->ov_stop_sector = parms.ov_stop_sector; |
| |
| /* If there is still bitmap IO pending, e.g. previous resync or verify |
| * just being finished, wait for it before requesting a new resync. */ |
| drbd_suspend_io(mdev); |
| wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
| retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
| drbd_resume_io(mdev); |
| 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 || retcode > NO_ERROR) { |
| 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); |
| } |