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Based on 1 normalized pattern(s): this copyrighted material is made available to anyone wishing to use modify copy or redistribute it subject to the terms and conditions of the gnu general public license v 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 45 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.342746075@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
957 lines
23 KiB
C
957 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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**
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "lockspace.h"
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#include "dir.h"
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#include "config.h"
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#include "ast.h"
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#include "memory.h"
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#include "rcom.h"
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#include "lock.h"
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#include "lowcomms.h"
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#include "member.h"
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#include "recover.h"
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/*
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* Recovery waiting routines: these functions wait for a particular reply from
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* a remote node, or for the remote node to report a certain status. They need
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* to abort if the lockspace is stopped indicating a node has failed (perhaps
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* the one being waited for).
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*/
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/*
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* Wait until given function returns non-zero or lockspace is stopped
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* (LS_RECOVERY_STOP set due to failure of a node in ls_nodes). When another
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* function thinks it could have completed the waited-on task, they should wake
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* up ls_wait_general to get an immediate response rather than waiting for the
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* timeout. This uses a timeout so it can check periodically if the wait
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* should abort due to node failure (which doesn't cause a wake_up).
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* This should only be called by the dlm_recoverd thread.
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*/
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int dlm_wait_function(struct dlm_ls *ls, int (*testfn) (struct dlm_ls *ls))
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{
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int error = 0;
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int rv;
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while (1) {
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rv = wait_event_timeout(ls->ls_wait_general,
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testfn(ls) || dlm_recovery_stopped(ls),
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dlm_config.ci_recover_timer * HZ);
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if (rv)
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break;
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if (test_bit(LSFL_RCOM_WAIT, &ls->ls_flags)) {
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log_debug(ls, "dlm_wait_function timed out");
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return -ETIMEDOUT;
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}
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}
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if (dlm_recovery_stopped(ls)) {
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log_debug(ls, "dlm_wait_function aborted");
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error = -EINTR;
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}
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return error;
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}
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/*
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* An efficient way for all nodes to wait for all others to have a certain
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* status. The node with the lowest nodeid polls all the others for their
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* status (wait_status_all) and all the others poll the node with the low id
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* for its accumulated result (wait_status_low). When all nodes have set
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* status flag X, then status flag X_ALL will be set on the low nodeid.
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*/
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uint32_t dlm_recover_status(struct dlm_ls *ls)
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{
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uint32_t status;
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spin_lock(&ls->ls_recover_lock);
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status = ls->ls_recover_status;
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spin_unlock(&ls->ls_recover_lock);
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return status;
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}
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static void _set_recover_status(struct dlm_ls *ls, uint32_t status)
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{
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ls->ls_recover_status |= status;
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}
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void dlm_set_recover_status(struct dlm_ls *ls, uint32_t status)
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{
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spin_lock(&ls->ls_recover_lock);
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_set_recover_status(ls, status);
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spin_unlock(&ls->ls_recover_lock);
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}
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static int wait_status_all(struct dlm_ls *ls, uint32_t wait_status,
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int save_slots)
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{
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struct dlm_rcom *rc = ls->ls_recover_buf;
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struct dlm_member *memb;
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int error = 0, delay;
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list_for_each_entry(memb, &ls->ls_nodes, list) {
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delay = 0;
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for (;;) {
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if (dlm_recovery_stopped(ls)) {
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error = -EINTR;
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goto out;
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}
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error = dlm_rcom_status(ls, memb->nodeid, 0);
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if (error)
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goto out;
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if (save_slots)
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dlm_slot_save(ls, rc, memb);
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if (rc->rc_result & wait_status)
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break;
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if (delay < 1000)
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delay += 20;
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msleep(delay);
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}
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}
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out:
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return error;
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}
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static int wait_status_low(struct dlm_ls *ls, uint32_t wait_status,
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uint32_t status_flags)
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{
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struct dlm_rcom *rc = ls->ls_recover_buf;
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int error = 0, delay = 0, nodeid = ls->ls_low_nodeid;
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for (;;) {
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if (dlm_recovery_stopped(ls)) {
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error = -EINTR;
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goto out;
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}
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error = dlm_rcom_status(ls, nodeid, status_flags);
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if (error)
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break;
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if (rc->rc_result & wait_status)
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break;
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if (delay < 1000)
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delay += 20;
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msleep(delay);
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}
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out:
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return error;
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}
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static int wait_status(struct dlm_ls *ls, uint32_t status)
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{
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uint32_t status_all = status << 1;
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int error;
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if (ls->ls_low_nodeid == dlm_our_nodeid()) {
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error = wait_status_all(ls, status, 0);
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if (!error)
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dlm_set_recover_status(ls, status_all);
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} else
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error = wait_status_low(ls, status_all, 0);
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return error;
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}
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int dlm_recover_members_wait(struct dlm_ls *ls)
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{
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struct dlm_member *memb;
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struct dlm_slot *slots;
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int num_slots, slots_size;
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int error, rv;
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uint32_t gen;
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list_for_each_entry(memb, &ls->ls_nodes, list) {
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memb->slot = -1;
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memb->generation = 0;
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}
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if (ls->ls_low_nodeid == dlm_our_nodeid()) {
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error = wait_status_all(ls, DLM_RS_NODES, 1);
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if (error)
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goto out;
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/* slots array is sparse, slots_size may be > num_slots */
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rv = dlm_slots_assign(ls, &num_slots, &slots_size, &slots, &gen);
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if (!rv) {
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spin_lock(&ls->ls_recover_lock);
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_set_recover_status(ls, DLM_RS_NODES_ALL);
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ls->ls_num_slots = num_slots;
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ls->ls_slots_size = slots_size;
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ls->ls_slots = slots;
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ls->ls_generation = gen;
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spin_unlock(&ls->ls_recover_lock);
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} else {
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dlm_set_recover_status(ls, DLM_RS_NODES_ALL);
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}
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} else {
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error = wait_status_low(ls, DLM_RS_NODES_ALL, DLM_RSF_NEED_SLOTS);
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if (error)
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goto out;
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dlm_slots_copy_in(ls);
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}
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out:
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return error;
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}
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int dlm_recover_directory_wait(struct dlm_ls *ls)
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{
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return wait_status(ls, DLM_RS_DIR);
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}
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int dlm_recover_locks_wait(struct dlm_ls *ls)
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{
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return wait_status(ls, DLM_RS_LOCKS);
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}
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int dlm_recover_done_wait(struct dlm_ls *ls)
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{
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return wait_status(ls, DLM_RS_DONE);
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}
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/*
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* The recover_list contains all the rsb's for which we've requested the new
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* master nodeid. As replies are returned from the resource directories the
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* rsb's are removed from the list. When the list is empty we're done.
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*
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* The recover_list is later similarly used for all rsb's for which we've sent
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* new lkb's and need to receive new corresponding lkid's.
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*
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* We use the address of the rsb struct as a simple local identifier for the
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* rsb so we can match an rcom reply with the rsb it was sent for.
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*/
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static int recover_list_empty(struct dlm_ls *ls)
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{
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int empty;
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spin_lock(&ls->ls_recover_list_lock);
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empty = list_empty(&ls->ls_recover_list);
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spin_unlock(&ls->ls_recover_list_lock);
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return empty;
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}
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static void recover_list_add(struct dlm_rsb *r)
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{
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struct dlm_ls *ls = r->res_ls;
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spin_lock(&ls->ls_recover_list_lock);
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if (list_empty(&r->res_recover_list)) {
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list_add_tail(&r->res_recover_list, &ls->ls_recover_list);
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ls->ls_recover_list_count++;
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dlm_hold_rsb(r);
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}
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spin_unlock(&ls->ls_recover_list_lock);
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}
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static void recover_list_del(struct dlm_rsb *r)
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{
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struct dlm_ls *ls = r->res_ls;
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spin_lock(&ls->ls_recover_list_lock);
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list_del_init(&r->res_recover_list);
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ls->ls_recover_list_count--;
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spin_unlock(&ls->ls_recover_list_lock);
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dlm_put_rsb(r);
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}
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static void recover_list_clear(struct dlm_ls *ls)
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{
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struct dlm_rsb *r, *s;
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spin_lock(&ls->ls_recover_list_lock);
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list_for_each_entry_safe(r, s, &ls->ls_recover_list, res_recover_list) {
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list_del_init(&r->res_recover_list);
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r->res_recover_locks_count = 0;
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dlm_put_rsb(r);
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ls->ls_recover_list_count--;
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}
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if (ls->ls_recover_list_count != 0) {
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log_error(ls, "warning: recover_list_count %d",
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ls->ls_recover_list_count);
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ls->ls_recover_list_count = 0;
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}
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spin_unlock(&ls->ls_recover_list_lock);
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}
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static int recover_idr_empty(struct dlm_ls *ls)
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{
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int empty = 1;
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spin_lock(&ls->ls_recover_idr_lock);
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if (ls->ls_recover_list_count)
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empty = 0;
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spin_unlock(&ls->ls_recover_idr_lock);
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return empty;
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}
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static int recover_idr_add(struct dlm_rsb *r)
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{
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struct dlm_ls *ls = r->res_ls;
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int rv;
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idr_preload(GFP_NOFS);
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spin_lock(&ls->ls_recover_idr_lock);
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if (r->res_id) {
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rv = -1;
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goto out_unlock;
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}
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rv = idr_alloc(&ls->ls_recover_idr, r, 1, 0, GFP_NOWAIT);
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if (rv < 0)
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goto out_unlock;
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r->res_id = rv;
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ls->ls_recover_list_count++;
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dlm_hold_rsb(r);
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rv = 0;
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out_unlock:
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spin_unlock(&ls->ls_recover_idr_lock);
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idr_preload_end();
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return rv;
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}
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static void recover_idr_del(struct dlm_rsb *r)
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{
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struct dlm_ls *ls = r->res_ls;
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spin_lock(&ls->ls_recover_idr_lock);
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idr_remove(&ls->ls_recover_idr, r->res_id);
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r->res_id = 0;
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ls->ls_recover_list_count--;
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spin_unlock(&ls->ls_recover_idr_lock);
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dlm_put_rsb(r);
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}
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static struct dlm_rsb *recover_idr_find(struct dlm_ls *ls, uint64_t id)
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{
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struct dlm_rsb *r;
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spin_lock(&ls->ls_recover_idr_lock);
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r = idr_find(&ls->ls_recover_idr, (int)id);
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spin_unlock(&ls->ls_recover_idr_lock);
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return r;
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}
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static void recover_idr_clear(struct dlm_ls *ls)
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{
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struct dlm_rsb *r;
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int id;
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spin_lock(&ls->ls_recover_idr_lock);
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idr_for_each_entry(&ls->ls_recover_idr, r, id) {
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idr_remove(&ls->ls_recover_idr, id);
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r->res_id = 0;
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r->res_recover_locks_count = 0;
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ls->ls_recover_list_count--;
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dlm_put_rsb(r);
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}
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if (ls->ls_recover_list_count != 0) {
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log_error(ls, "warning: recover_list_count %d",
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ls->ls_recover_list_count);
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ls->ls_recover_list_count = 0;
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}
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spin_unlock(&ls->ls_recover_idr_lock);
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}
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/* Master recovery: find new master node for rsb's that were
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mastered on nodes that have been removed.
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dlm_recover_masters
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recover_master
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dlm_send_rcom_lookup -> receive_rcom_lookup
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dlm_dir_lookup
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receive_rcom_lookup_reply <-
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dlm_recover_master_reply
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set_new_master
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set_master_lkbs
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set_lock_master
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*/
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/*
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* Set the lock master for all LKBs in a lock queue
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* If we are the new master of the rsb, we may have received new
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* MSTCPY locks from other nodes already which we need to ignore
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* when setting the new nodeid.
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*/
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static void set_lock_master(struct list_head *queue, int nodeid)
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{
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struct dlm_lkb *lkb;
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list_for_each_entry(lkb, queue, lkb_statequeue) {
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if (!(lkb->lkb_flags & DLM_IFL_MSTCPY)) {
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lkb->lkb_nodeid = nodeid;
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lkb->lkb_remid = 0;
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}
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}
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}
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static void set_master_lkbs(struct dlm_rsb *r)
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{
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set_lock_master(&r->res_grantqueue, r->res_nodeid);
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set_lock_master(&r->res_convertqueue, r->res_nodeid);
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set_lock_master(&r->res_waitqueue, r->res_nodeid);
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}
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/*
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* Propagate the new master nodeid to locks
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* The NEW_MASTER flag tells dlm_recover_locks() which rsb's to consider.
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* The NEW_MASTER2 flag tells recover_lvb() and recover_grant() which
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* rsb's to consider.
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*/
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static void set_new_master(struct dlm_rsb *r)
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{
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set_master_lkbs(r);
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rsb_set_flag(r, RSB_NEW_MASTER);
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rsb_set_flag(r, RSB_NEW_MASTER2);
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}
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/*
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* We do async lookups on rsb's that need new masters. The rsb's
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* waiting for a lookup reply are kept on the recover_list.
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*
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* Another node recovering the master may have sent us a rcom lookup,
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* and our dlm_master_lookup() set it as the new master, along with
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* NEW_MASTER so that we'll recover it here (this implies dir_nodeid
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* equals our_nodeid below).
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*/
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static int recover_master(struct dlm_rsb *r, unsigned int *count)
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{
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struct dlm_ls *ls = r->res_ls;
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int our_nodeid, dir_nodeid;
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int is_removed = 0;
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int error;
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if (is_master(r))
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return 0;
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is_removed = dlm_is_removed(ls, r->res_nodeid);
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if (!is_removed && !rsb_flag(r, RSB_NEW_MASTER))
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return 0;
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our_nodeid = dlm_our_nodeid();
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dir_nodeid = dlm_dir_nodeid(r);
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if (dir_nodeid == our_nodeid) {
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if (is_removed) {
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r->res_master_nodeid = our_nodeid;
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r->res_nodeid = 0;
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}
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/* set master of lkbs to ourself when is_removed, or to
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another new master which we set along with NEW_MASTER
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in dlm_master_lookup */
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set_new_master(r);
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error = 0;
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} else {
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recover_idr_add(r);
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error = dlm_send_rcom_lookup(r, dir_nodeid);
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}
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(*count)++;
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return error;
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}
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/*
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* All MSTCPY locks are purged and rebuilt, even if the master stayed the same.
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* This is necessary because recovery can be started, aborted and restarted,
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* causing the master nodeid to briefly change during the aborted recovery, and
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* change back to the original value in the second recovery. The MSTCPY locks
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* may or may not have been purged during the aborted recovery. Another node
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* with an outstanding request in waiters list and a request reply saved in the
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* requestqueue, cannot know whether it should ignore the reply and resend the
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* request, or accept the reply and complete the request. It must do the
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* former if the remote node purged MSTCPY locks, and it must do the later if
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* the remote node did not. This is solved by always purging MSTCPY locks, in
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* which case, the request reply would always be ignored and the request
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* resent.
|
|
*/
|
|
|
|
static int recover_master_static(struct dlm_rsb *r, unsigned int *count)
|
|
{
|
|
int dir_nodeid = dlm_dir_nodeid(r);
|
|
int new_master = dir_nodeid;
|
|
|
|
if (dir_nodeid == dlm_our_nodeid())
|
|
new_master = 0;
|
|
|
|
dlm_purge_mstcpy_locks(r);
|
|
r->res_master_nodeid = dir_nodeid;
|
|
r->res_nodeid = new_master;
|
|
set_new_master(r);
|
|
(*count)++;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Go through local root resources and for each rsb which has a master which
|
|
* has departed, get the new master nodeid from the directory. The dir will
|
|
* assign mastery to the first node to look up the new master. That means
|
|
* we'll discover in this lookup if we're the new master of any rsb's.
|
|
*
|
|
* We fire off all the dir lookup requests individually and asynchronously to
|
|
* the correct dir node.
|
|
*/
|
|
|
|
int dlm_recover_masters(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_rsb *r;
|
|
unsigned int total = 0;
|
|
unsigned int count = 0;
|
|
int nodir = dlm_no_directory(ls);
|
|
int error;
|
|
|
|
log_rinfo(ls, "dlm_recover_masters");
|
|
|
|
down_read(&ls->ls_root_sem);
|
|
list_for_each_entry(r, &ls->ls_root_list, res_root_list) {
|
|
if (dlm_recovery_stopped(ls)) {
|
|
up_read(&ls->ls_root_sem);
|
|
error = -EINTR;
|
|
goto out;
|
|
}
|
|
|
|
lock_rsb(r);
|
|
if (nodir)
|
|
error = recover_master_static(r, &count);
|
|
else
|
|
error = recover_master(r, &count);
|
|
unlock_rsb(r);
|
|
cond_resched();
|
|
total++;
|
|
|
|
if (error) {
|
|
up_read(&ls->ls_root_sem);
|
|
goto out;
|
|
}
|
|
}
|
|
up_read(&ls->ls_root_sem);
|
|
|
|
log_rinfo(ls, "dlm_recover_masters %u of %u", count, total);
|
|
|
|
error = dlm_wait_function(ls, &recover_idr_empty);
|
|
out:
|
|
if (error)
|
|
recover_idr_clear(ls);
|
|
return error;
|
|
}
|
|
|
|
int dlm_recover_master_reply(struct dlm_ls *ls, struct dlm_rcom *rc)
|
|
{
|
|
struct dlm_rsb *r;
|
|
int ret_nodeid, new_master;
|
|
|
|
r = recover_idr_find(ls, rc->rc_id);
|
|
if (!r) {
|
|
log_error(ls, "dlm_recover_master_reply no id %llx",
|
|
(unsigned long long)rc->rc_id);
|
|
goto out;
|
|
}
|
|
|
|
ret_nodeid = rc->rc_result;
|
|
|
|
if (ret_nodeid == dlm_our_nodeid())
|
|
new_master = 0;
|
|
else
|
|
new_master = ret_nodeid;
|
|
|
|
lock_rsb(r);
|
|
r->res_master_nodeid = ret_nodeid;
|
|
r->res_nodeid = new_master;
|
|
set_new_master(r);
|
|
unlock_rsb(r);
|
|
recover_idr_del(r);
|
|
|
|
if (recover_idr_empty(ls))
|
|
wake_up(&ls->ls_wait_general);
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Lock recovery: rebuild the process-copy locks we hold on a
|
|
remastered rsb on the new rsb master.
|
|
|
|
dlm_recover_locks
|
|
recover_locks
|
|
recover_locks_queue
|
|
dlm_send_rcom_lock -> receive_rcom_lock
|
|
dlm_recover_master_copy
|
|
receive_rcom_lock_reply <-
|
|
dlm_recover_process_copy
|
|
*/
|
|
|
|
|
|
/*
|
|
* keep a count of the number of lkb's we send to the new master; when we get
|
|
* an equal number of replies then recovery for the rsb is done
|
|
*/
|
|
|
|
static int recover_locks_queue(struct dlm_rsb *r, struct list_head *head)
|
|
{
|
|
struct dlm_lkb *lkb;
|
|
int error = 0;
|
|
|
|
list_for_each_entry(lkb, head, lkb_statequeue) {
|
|
error = dlm_send_rcom_lock(r, lkb);
|
|
if (error)
|
|
break;
|
|
r->res_recover_locks_count++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int recover_locks(struct dlm_rsb *r)
|
|
{
|
|
int error = 0;
|
|
|
|
lock_rsb(r);
|
|
|
|
DLM_ASSERT(!r->res_recover_locks_count, dlm_dump_rsb(r););
|
|
|
|
error = recover_locks_queue(r, &r->res_grantqueue);
|
|
if (error)
|
|
goto out;
|
|
error = recover_locks_queue(r, &r->res_convertqueue);
|
|
if (error)
|
|
goto out;
|
|
error = recover_locks_queue(r, &r->res_waitqueue);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (r->res_recover_locks_count)
|
|
recover_list_add(r);
|
|
else
|
|
rsb_clear_flag(r, RSB_NEW_MASTER);
|
|
out:
|
|
unlock_rsb(r);
|
|
return error;
|
|
}
|
|
|
|
int dlm_recover_locks(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_rsb *r;
|
|
int error, count = 0;
|
|
|
|
down_read(&ls->ls_root_sem);
|
|
list_for_each_entry(r, &ls->ls_root_list, res_root_list) {
|
|
if (is_master(r)) {
|
|
rsb_clear_flag(r, RSB_NEW_MASTER);
|
|
continue;
|
|
}
|
|
|
|
if (!rsb_flag(r, RSB_NEW_MASTER))
|
|
continue;
|
|
|
|
if (dlm_recovery_stopped(ls)) {
|
|
error = -EINTR;
|
|
up_read(&ls->ls_root_sem);
|
|
goto out;
|
|
}
|
|
|
|
error = recover_locks(r);
|
|
if (error) {
|
|
up_read(&ls->ls_root_sem);
|
|
goto out;
|
|
}
|
|
|
|
count += r->res_recover_locks_count;
|
|
}
|
|
up_read(&ls->ls_root_sem);
|
|
|
|
log_rinfo(ls, "dlm_recover_locks %d out", count);
|
|
|
|
error = dlm_wait_function(ls, &recover_list_empty);
|
|
out:
|
|
if (error)
|
|
recover_list_clear(ls);
|
|
return error;
|
|
}
|
|
|
|
void dlm_recovered_lock(struct dlm_rsb *r)
|
|
{
|
|
DLM_ASSERT(rsb_flag(r, RSB_NEW_MASTER), dlm_dump_rsb(r););
|
|
|
|
r->res_recover_locks_count--;
|
|
if (!r->res_recover_locks_count) {
|
|
rsb_clear_flag(r, RSB_NEW_MASTER);
|
|
recover_list_del(r);
|
|
}
|
|
|
|
if (recover_list_empty(r->res_ls))
|
|
wake_up(&r->res_ls->ls_wait_general);
|
|
}
|
|
|
|
/*
|
|
* The lvb needs to be recovered on all master rsb's. This includes setting
|
|
* the VALNOTVALID flag if necessary, and determining the correct lvb contents
|
|
* based on the lvb's of the locks held on the rsb.
|
|
*
|
|
* RSB_VALNOTVALID is set in two cases:
|
|
*
|
|
* 1. we are master, but not new, and we purged an EX/PW lock held by a
|
|
* failed node (in dlm_recover_purge which set RSB_RECOVER_LVB_INVAL)
|
|
*
|
|
* 2. we are a new master, and there are only NL/CR locks left.
|
|
* (We could probably improve this by only invaliding in this way when
|
|
* the previous master left uncleanly. VMS docs mention that.)
|
|
*
|
|
* The LVB contents are only considered for changing when this is a new master
|
|
* of the rsb (NEW_MASTER2). Then, the rsb's lvb is taken from any lkb with
|
|
* mode > CR. If no lkb's exist with mode above CR, the lvb contents are taken
|
|
* from the lkb with the largest lvb sequence number.
|
|
*/
|
|
|
|
static void recover_lvb(struct dlm_rsb *r)
|
|
{
|
|
struct dlm_lkb *lkb, *high_lkb = NULL;
|
|
uint32_t high_seq = 0;
|
|
int lock_lvb_exists = 0;
|
|
int big_lock_exists = 0;
|
|
int lvblen = r->res_ls->ls_lvblen;
|
|
|
|
if (!rsb_flag(r, RSB_NEW_MASTER2) &&
|
|
rsb_flag(r, RSB_RECOVER_LVB_INVAL)) {
|
|
/* case 1 above */
|
|
rsb_set_flag(r, RSB_VALNOTVALID);
|
|
return;
|
|
}
|
|
|
|
if (!rsb_flag(r, RSB_NEW_MASTER2))
|
|
return;
|
|
|
|
/* we are the new master, so figure out if VALNOTVALID should
|
|
be set, and set the rsb lvb from the best lkb available. */
|
|
|
|
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
|
|
if (!(lkb->lkb_exflags & DLM_LKF_VALBLK))
|
|
continue;
|
|
|
|
lock_lvb_exists = 1;
|
|
|
|
if (lkb->lkb_grmode > DLM_LOCK_CR) {
|
|
big_lock_exists = 1;
|
|
goto setflag;
|
|
}
|
|
|
|
if (((int)lkb->lkb_lvbseq - (int)high_seq) >= 0) {
|
|
high_lkb = lkb;
|
|
high_seq = lkb->lkb_lvbseq;
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) {
|
|
if (!(lkb->lkb_exflags & DLM_LKF_VALBLK))
|
|
continue;
|
|
|
|
lock_lvb_exists = 1;
|
|
|
|
if (lkb->lkb_grmode > DLM_LOCK_CR) {
|
|
big_lock_exists = 1;
|
|
goto setflag;
|
|
}
|
|
|
|
if (((int)lkb->lkb_lvbseq - (int)high_seq) >= 0) {
|
|
high_lkb = lkb;
|
|
high_seq = lkb->lkb_lvbseq;
|
|
}
|
|
}
|
|
|
|
setflag:
|
|
if (!lock_lvb_exists)
|
|
goto out;
|
|
|
|
/* lvb is invalidated if only NL/CR locks remain */
|
|
if (!big_lock_exists)
|
|
rsb_set_flag(r, RSB_VALNOTVALID);
|
|
|
|
if (!r->res_lvbptr) {
|
|
r->res_lvbptr = dlm_allocate_lvb(r->res_ls);
|
|
if (!r->res_lvbptr)
|
|
goto out;
|
|
}
|
|
|
|
if (big_lock_exists) {
|
|
r->res_lvbseq = lkb->lkb_lvbseq;
|
|
memcpy(r->res_lvbptr, lkb->lkb_lvbptr, lvblen);
|
|
} else if (high_lkb) {
|
|
r->res_lvbseq = high_lkb->lkb_lvbseq;
|
|
memcpy(r->res_lvbptr, high_lkb->lkb_lvbptr, lvblen);
|
|
} else {
|
|
r->res_lvbseq = 0;
|
|
memset(r->res_lvbptr, 0, lvblen);
|
|
}
|
|
out:
|
|
return;
|
|
}
|
|
|
|
/* All master rsb's flagged RECOVER_CONVERT need to be looked at. The locks
|
|
converting PR->CW or CW->PR need to have their lkb_grmode set. */
|
|
|
|
static void recover_conversion(struct dlm_rsb *r)
|
|
{
|
|
struct dlm_ls *ls = r->res_ls;
|
|
struct dlm_lkb *lkb;
|
|
int grmode = -1;
|
|
|
|
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
|
|
if (lkb->lkb_grmode == DLM_LOCK_PR ||
|
|
lkb->lkb_grmode == DLM_LOCK_CW) {
|
|
grmode = lkb->lkb_grmode;
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) {
|
|
if (lkb->lkb_grmode != DLM_LOCK_IV)
|
|
continue;
|
|
if (grmode == -1) {
|
|
log_debug(ls, "recover_conversion %x set gr to rq %d",
|
|
lkb->lkb_id, lkb->lkb_rqmode);
|
|
lkb->lkb_grmode = lkb->lkb_rqmode;
|
|
} else {
|
|
log_debug(ls, "recover_conversion %x set gr %d",
|
|
lkb->lkb_id, grmode);
|
|
lkb->lkb_grmode = grmode;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We've become the new master for this rsb and waiting/converting locks may
|
|
need to be granted in dlm_recover_grant() due to locks that may have
|
|
existed from a removed node. */
|
|
|
|
static void recover_grant(struct dlm_rsb *r)
|
|
{
|
|
if (!list_empty(&r->res_waitqueue) || !list_empty(&r->res_convertqueue))
|
|
rsb_set_flag(r, RSB_RECOVER_GRANT);
|
|
}
|
|
|
|
void dlm_recover_rsbs(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_rsb *r;
|
|
unsigned int count = 0;
|
|
|
|
down_read(&ls->ls_root_sem);
|
|
list_for_each_entry(r, &ls->ls_root_list, res_root_list) {
|
|
lock_rsb(r);
|
|
if (is_master(r)) {
|
|
if (rsb_flag(r, RSB_RECOVER_CONVERT))
|
|
recover_conversion(r);
|
|
|
|
/* recover lvb before granting locks so the updated
|
|
lvb/VALNOTVALID is presented in the completion */
|
|
recover_lvb(r);
|
|
|
|
if (rsb_flag(r, RSB_NEW_MASTER2))
|
|
recover_grant(r);
|
|
count++;
|
|
} else {
|
|
rsb_clear_flag(r, RSB_VALNOTVALID);
|
|
}
|
|
rsb_clear_flag(r, RSB_RECOVER_CONVERT);
|
|
rsb_clear_flag(r, RSB_RECOVER_LVB_INVAL);
|
|
rsb_clear_flag(r, RSB_NEW_MASTER2);
|
|
unlock_rsb(r);
|
|
}
|
|
up_read(&ls->ls_root_sem);
|
|
|
|
if (count)
|
|
log_rinfo(ls, "dlm_recover_rsbs %d done", count);
|
|
}
|
|
|
|
/* Create a single list of all root rsb's to be used during recovery */
|
|
|
|
int dlm_create_root_list(struct dlm_ls *ls)
|
|
{
|
|
struct rb_node *n;
|
|
struct dlm_rsb *r;
|
|
int i, error = 0;
|
|
|
|
down_write(&ls->ls_root_sem);
|
|
if (!list_empty(&ls->ls_root_list)) {
|
|
log_error(ls, "root list not empty");
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < ls->ls_rsbtbl_size; i++) {
|
|
spin_lock(&ls->ls_rsbtbl[i].lock);
|
|
for (n = rb_first(&ls->ls_rsbtbl[i].keep); n; n = rb_next(n)) {
|
|
r = rb_entry(n, struct dlm_rsb, res_hashnode);
|
|
list_add(&r->res_root_list, &ls->ls_root_list);
|
|
dlm_hold_rsb(r);
|
|
}
|
|
|
|
if (!RB_EMPTY_ROOT(&ls->ls_rsbtbl[i].toss))
|
|
log_error(ls, "dlm_create_root_list toss not empty");
|
|
spin_unlock(&ls->ls_rsbtbl[i].lock);
|
|
}
|
|
out:
|
|
up_write(&ls->ls_root_sem);
|
|
return error;
|
|
}
|
|
|
|
void dlm_release_root_list(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_rsb *r, *safe;
|
|
|
|
down_write(&ls->ls_root_sem);
|
|
list_for_each_entry_safe(r, safe, &ls->ls_root_list, res_root_list) {
|
|
list_del_init(&r->res_root_list);
|
|
dlm_put_rsb(r);
|
|
}
|
|
up_write(&ls->ls_root_sem);
|
|
}
|
|
|
|
void dlm_clear_toss(struct dlm_ls *ls)
|
|
{
|
|
struct rb_node *n, *next;
|
|
struct dlm_rsb *r;
|
|
unsigned int count = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < ls->ls_rsbtbl_size; i++) {
|
|
spin_lock(&ls->ls_rsbtbl[i].lock);
|
|
for (n = rb_first(&ls->ls_rsbtbl[i].toss); n; n = next) {
|
|
next = rb_next(n);
|
|
r = rb_entry(n, struct dlm_rsb, res_hashnode);
|
|
rb_erase(n, &ls->ls_rsbtbl[i].toss);
|
|
dlm_free_rsb(r);
|
|
count++;
|
|
}
|
|
spin_unlock(&ls->ls_rsbtbl[i].lock);
|
|
}
|
|
|
|
if (count)
|
|
log_rinfo(ls, "dlm_clear_toss %u done", count);
|
|
}
|
|
|