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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150// SPDX-License-Identifier: GPL-2.0-only/***************************************************************************************************************************************************************** Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.*****************************************************************************************************************************************************************/
#include "dlm_internal.h"#include "member.h"#include "lock.h"#include "dir.h"#include "config.h"#include "requestqueue.h"#include "util.h"
struct rq_entry { struct list_head list; uint32_t recover_seq; int nodeid; struct dlm_message request;};
/* * Requests received while the lockspace is in recovery get added to the * request queue and processed when recovery is complete. This happens when * the lockspace is suspended on some nodes before it is on others, or the * lockspace is enabled on some while still suspended on others. */
void dlm_add_requestqueue(struct dlm_ls *ls, int nodeid, const struct dlm_message *ms){ struct rq_entry *e; int length = le16_to_cpu(ms->m_header.h_length) - sizeof(struct dlm_message);
e = kmalloc(sizeof(struct rq_entry) + length, GFP_ATOMIC); if (!e) { log_print("dlm_add_requestqueue: out of memory len %d", length); return; }
e->recover_seq = ls->ls_recover_seq & 0xFFFFFFFF; e->nodeid = nodeid; memcpy(&e->request, ms, sizeof(*ms)); memcpy(&e->request.m_extra, ms->m_extra, length);
list_add_tail(&e->list, &ls->ls_requestqueue);}
/* * Called by dlm_recoverd to process normal messages saved while recovery was * happening. Normal locking has been enabled before this is called. dlm_recv * upon receiving a message, will wait for all saved messages to be drained * here before processing the message it got. If a new dlm_ls_stop() arrives * while we're processing these saved messages, it may block trying to suspend * dlm_recv if dlm_recv is waiting for us in dlm_wait_requestqueue. In that * case, we don't abort since locking_stopped is still 0. If dlm_recv is not * waiting for us, then this processing may be aborted due to locking_stopped. */
int dlm_process_requestqueue(struct dlm_ls *ls){ struct rq_entry *e; struct dlm_message *ms; int error = 0;
write_lock_bh(&ls->ls_requestqueue_lock); for (;;) { if (list_empty(&ls->ls_requestqueue)) { clear_bit(LSFL_RECV_MSG_BLOCKED, &ls->ls_flags); error = 0; break; } e = list_first_entry(&ls->ls_requestqueue, struct rq_entry, list);
ms = &e->request;
log_limit(ls, "dlm_process_requestqueue msg %d from %d " "lkid %x remid %x result %d seq %u", le32_to_cpu(ms->m_type), le32_to_cpu(ms->m_header.h_nodeid), le32_to_cpu(ms->m_lkid), le32_to_cpu(ms->m_remid), from_dlm_errno(le32_to_cpu(ms->m_result)), e->recover_seq);
dlm_receive_message_saved(ls, &e->request, e->recover_seq); list_del(&e->list); kfree(e);
if (dlm_locking_stopped(ls)) { log_debug(ls, "process_requestqueue abort running"); error = -EINTR; break; } write_unlock_bh(&ls->ls_requestqueue_lock); schedule(); write_lock_bh(&ls->ls_requestqueue_lock); } write_unlock_bh(&ls->ls_requestqueue_lock);
return error;}
static int purge_request(struct dlm_ls *ls, struct dlm_message *ms, int nodeid){ __le32 type = ms->m_type;
/* the ls is being cleaned up and freed by release_lockspace */ if (!atomic_read(&ls->ls_count)) return 1;
if (dlm_is_removed(ls, nodeid)) return 1;
/* directory operations are always purged because the directory is always rebuilt during recovery and the lookups resent */
if (type == cpu_to_le32(DLM_MSG_REMOVE) || type == cpu_to_le32(DLM_MSG_LOOKUP) || type == cpu_to_le32(DLM_MSG_LOOKUP_REPLY)) return 1;
if (!dlm_no_directory(ls)) return 0;
return 1;}
void dlm_purge_requestqueue(struct dlm_ls *ls){ struct dlm_message *ms; struct rq_entry *e, *safe;
write_lock_bh(&ls->ls_requestqueue_lock); list_for_each_entry_safe(e, safe, &ls->ls_requestqueue, list) { ms = &e->request;
if (purge_request(ls, ms, e->nodeid)) { list_del(&e->list); kfree(e); } } write_unlock_bh(&ls->ls_requestqueue_lock);}