mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 04:36:43 +07:00
075f01775f
The log messages relating to the progress of recovery are minimal and very often useful. Change these to the KERN_INFO level so they are always available. Signed-off-by: David Teigland <teigland@redhat.com>
315 lines
8.0 KiB
C
315 lines
8.0 KiB
C
/******************************************************************************
|
|
*******************************************************************************
|
|
**
|
|
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
|
|
**
|
|
** 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.
|
|
**
|
|
*******************************************************************************
|
|
******************************************************************************/
|
|
|
|
#include "dlm_internal.h"
|
|
#include "lock.h"
|
|
#include "user.h"
|
|
#include "ast.h"
|
|
|
|
static uint64_t dlm_cb_seq;
|
|
static DEFINE_SPINLOCK(dlm_cb_seq_spin);
|
|
|
|
static void dlm_dump_lkb_callbacks(struct dlm_lkb *lkb)
|
|
{
|
|
int i;
|
|
|
|
log_print("last_bast %x %llu flags %x mode %d sb %d %x",
|
|
lkb->lkb_id,
|
|
(unsigned long long)lkb->lkb_last_bast.seq,
|
|
lkb->lkb_last_bast.flags,
|
|
lkb->lkb_last_bast.mode,
|
|
lkb->lkb_last_bast.sb_status,
|
|
lkb->lkb_last_bast.sb_flags);
|
|
|
|
log_print("last_cast %x %llu flags %x mode %d sb %d %x",
|
|
lkb->lkb_id,
|
|
(unsigned long long)lkb->lkb_last_cast.seq,
|
|
lkb->lkb_last_cast.flags,
|
|
lkb->lkb_last_cast.mode,
|
|
lkb->lkb_last_cast.sb_status,
|
|
lkb->lkb_last_cast.sb_flags);
|
|
|
|
for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
|
|
log_print("cb %x %llu flags %x mode %d sb %d %x",
|
|
lkb->lkb_id,
|
|
(unsigned long long)lkb->lkb_callbacks[i].seq,
|
|
lkb->lkb_callbacks[i].flags,
|
|
lkb->lkb_callbacks[i].mode,
|
|
lkb->lkb_callbacks[i].sb_status,
|
|
lkb->lkb_callbacks[i].sb_flags);
|
|
}
|
|
}
|
|
|
|
int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
|
|
int status, uint32_t sbflags, uint64_t seq)
|
|
{
|
|
struct dlm_ls *ls = lkb->lkb_resource->res_ls;
|
|
uint64_t prev_seq;
|
|
int prev_mode;
|
|
int i, rv;
|
|
|
|
for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
|
|
if (lkb->lkb_callbacks[i].seq)
|
|
continue;
|
|
|
|
/*
|
|
* Suppress some redundant basts here, do more on removal.
|
|
* Don't even add a bast if the callback just before it
|
|
* is a bast for the same mode or a more restrictive mode.
|
|
* (the addional > PR check is needed for PR/CW inversion)
|
|
*/
|
|
|
|
if ((i > 0) && (flags & DLM_CB_BAST) &&
|
|
(lkb->lkb_callbacks[i-1].flags & DLM_CB_BAST)) {
|
|
|
|
prev_seq = lkb->lkb_callbacks[i-1].seq;
|
|
prev_mode = lkb->lkb_callbacks[i-1].mode;
|
|
|
|
if ((prev_mode == mode) ||
|
|
(prev_mode > mode && prev_mode > DLM_LOCK_PR)) {
|
|
|
|
log_debug(ls, "skip %x add bast %llu mode %d "
|
|
"for bast %llu mode %d",
|
|
lkb->lkb_id,
|
|
(unsigned long long)seq,
|
|
mode,
|
|
(unsigned long long)prev_seq,
|
|
prev_mode);
|
|
rv = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
lkb->lkb_callbacks[i].seq = seq;
|
|
lkb->lkb_callbacks[i].flags = flags;
|
|
lkb->lkb_callbacks[i].mode = mode;
|
|
lkb->lkb_callbacks[i].sb_status = status;
|
|
lkb->lkb_callbacks[i].sb_flags = (sbflags & 0x000000FF);
|
|
rv = 0;
|
|
break;
|
|
}
|
|
|
|
if (i == DLM_CALLBACKS_SIZE) {
|
|
log_error(ls, "no callbacks %x %llu flags %x mode %d sb %d %x",
|
|
lkb->lkb_id, (unsigned long long)seq,
|
|
flags, mode, status, sbflags);
|
|
dlm_dump_lkb_callbacks(lkb);
|
|
rv = -1;
|
|
goto out;
|
|
}
|
|
out:
|
|
return rv;
|
|
}
|
|
|
|
int dlm_rem_lkb_callback(struct dlm_ls *ls, struct dlm_lkb *lkb,
|
|
struct dlm_callback *cb, int *resid)
|
|
{
|
|
int i, rv;
|
|
|
|
*resid = 0;
|
|
|
|
if (!lkb->lkb_callbacks[0].seq) {
|
|
rv = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
/* oldest undelivered cb is callbacks[0] */
|
|
|
|
memcpy(cb, &lkb->lkb_callbacks[0], sizeof(struct dlm_callback));
|
|
memset(&lkb->lkb_callbacks[0], 0, sizeof(struct dlm_callback));
|
|
|
|
/* shift others down */
|
|
|
|
for (i = 1; i < DLM_CALLBACKS_SIZE; i++) {
|
|
if (!lkb->lkb_callbacks[i].seq)
|
|
break;
|
|
memcpy(&lkb->lkb_callbacks[i-1], &lkb->lkb_callbacks[i],
|
|
sizeof(struct dlm_callback));
|
|
memset(&lkb->lkb_callbacks[i], 0, sizeof(struct dlm_callback));
|
|
(*resid)++;
|
|
}
|
|
|
|
/* if cb is a bast, it should be skipped if the blocking mode is
|
|
compatible with the last granted mode */
|
|
|
|
if ((cb->flags & DLM_CB_BAST) && lkb->lkb_last_cast.seq) {
|
|
if (dlm_modes_compat(cb->mode, lkb->lkb_last_cast.mode)) {
|
|
cb->flags |= DLM_CB_SKIP;
|
|
|
|
log_debug(ls, "skip %x bast %llu mode %d "
|
|
"for cast %llu mode %d",
|
|
lkb->lkb_id,
|
|
(unsigned long long)cb->seq,
|
|
cb->mode,
|
|
(unsigned long long)lkb->lkb_last_cast.seq,
|
|
lkb->lkb_last_cast.mode);
|
|
rv = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (cb->flags & DLM_CB_CAST) {
|
|
memcpy(&lkb->lkb_last_cast, cb, sizeof(struct dlm_callback));
|
|
lkb->lkb_last_cast_time = ktime_get();
|
|
}
|
|
|
|
if (cb->flags & DLM_CB_BAST) {
|
|
memcpy(&lkb->lkb_last_bast, cb, sizeof(struct dlm_callback));
|
|
lkb->lkb_last_bast_time = ktime_get();
|
|
}
|
|
rv = 0;
|
|
out:
|
|
return rv;
|
|
}
|
|
|
|
void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
|
|
uint32_t sbflags)
|
|
{
|
|
struct dlm_ls *ls = lkb->lkb_resource->res_ls;
|
|
uint64_t new_seq, prev_seq;
|
|
int rv;
|
|
|
|
spin_lock(&dlm_cb_seq_spin);
|
|
new_seq = ++dlm_cb_seq;
|
|
spin_unlock(&dlm_cb_seq_spin);
|
|
|
|
if (lkb->lkb_flags & DLM_IFL_USER) {
|
|
dlm_user_add_ast(lkb, flags, mode, status, sbflags, new_seq);
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&lkb->lkb_cb_mutex);
|
|
prev_seq = lkb->lkb_callbacks[0].seq;
|
|
|
|
rv = dlm_add_lkb_callback(lkb, flags, mode, status, sbflags, new_seq);
|
|
if (rv < 0)
|
|
goto out;
|
|
|
|
if (!prev_seq) {
|
|
kref_get(&lkb->lkb_ref);
|
|
|
|
if (test_bit(LSFL_CB_DELAY, &ls->ls_flags)) {
|
|
mutex_lock(&ls->ls_cb_mutex);
|
|
list_add(&lkb->lkb_cb_list, &ls->ls_cb_delay);
|
|
mutex_unlock(&ls->ls_cb_mutex);
|
|
} else {
|
|
queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work);
|
|
}
|
|
}
|
|
out:
|
|
mutex_unlock(&lkb->lkb_cb_mutex);
|
|
}
|
|
|
|
void dlm_callback_work(struct work_struct *work)
|
|
{
|
|
struct dlm_lkb *lkb = container_of(work, struct dlm_lkb, lkb_cb_work);
|
|
struct dlm_ls *ls = lkb->lkb_resource->res_ls;
|
|
void (*castfn) (void *astparam);
|
|
void (*bastfn) (void *astparam, int mode);
|
|
struct dlm_callback callbacks[DLM_CALLBACKS_SIZE];
|
|
int i, rv, resid;
|
|
|
|
memset(&callbacks, 0, sizeof(callbacks));
|
|
|
|
mutex_lock(&lkb->lkb_cb_mutex);
|
|
if (!lkb->lkb_callbacks[0].seq) {
|
|
/* no callback work exists, shouldn't happen */
|
|
log_error(ls, "dlm_callback_work %x no work", lkb->lkb_id);
|
|
dlm_print_lkb(lkb);
|
|
dlm_dump_lkb_callbacks(lkb);
|
|
}
|
|
|
|
for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
|
|
rv = dlm_rem_lkb_callback(ls, lkb, &callbacks[i], &resid);
|
|
if (rv < 0)
|
|
break;
|
|
}
|
|
|
|
if (resid) {
|
|
/* cbs remain, loop should have removed all, shouldn't happen */
|
|
log_error(ls, "dlm_callback_work %x resid %d", lkb->lkb_id,
|
|
resid);
|
|
dlm_print_lkb(lkb);
|
|
dlm_dump_lkb_callbacks(lkb);
|
|
}
|
|
mutex_unlock(&lkb->lkb_cb_mutex);
|
|
|
|
castfn = lkb->lkb_astfn;
|
|
bastfn = lkb->lkb_bastfn;
|
|
|
|
for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
|
|
if (!callbacks[i].seq)
|
|
break;
|
|
if (callbacks[i].flags & DLM_CB_SKIP) {
|
|
continue;
|
|
} else if (callbacks[i].flags & DLM_CB_BAST) {
|
|
bastfn(lkb->lkb_astparam, callbacks[i].mode);
|
|
} else if (callbacks[i].flags & DLM_CB_CAST) {
|
|
lkb->lkb_lksb->sb_status = callbacks[i].sb_status;
|
|
lkb->lkb_lksb->sb_flags = callbacks[i].sb_flags;
|
|
castfn(lkb->lkb_astparam);
|
|
}
|
|
}
|
|
|
|
/* undo kref_get from dlm_add_callback, may cause lkb to be freed */
|
|
dlm_put_lkb(lkb);
|
|
}
|
|
|
|
int dlm_callback_start(struct dlm_ls *ls)
|
|
{
|
|
ls->ls_callback_wq = alloc_workqueue("dlm_callback",
|
|
WQ_UNBOUND | WQ_MEM_RECLAIM, 0);
|
|
if (!ls->ls_callback_wq) {
|
|
log_print("can't start dlm_callback workqueue");
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void dlm_callback_stop(struct dlm_ls *ls)
|
|
{
|
|
if (ls->ls_callback_wq)
|
|
destroy_workqueue(ls->ls_callback_wq);
|
|
}
|
|
|
|
void dlm_callback_suspend(struct dlm_ls *ls)
|
|
{
|
|
set_bit(LSFL_CB_DELAY, &ls->ls_flags);
|
|
|
|
if (ls->ls_callback_wq)
|
|
flush_workqueue(ls->ls_callback_wq);
|
|
}
|
|
|
|
void dlm_callback_resume(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_lkb *lkb, *safe;
|
|
int count = 0;
|
|
|
|
clear_bit(LSFL_CB_DELAY, &ls->ls_flags);
|
|
|
|
if (!ls->ls_callback_wq)
|
|
return;
|
|
|
|
mutex_lock(&ls->ls_cb_mutex);
|
|
list_for_each_entry_safe(lkb, safe, &ls->ls_cb_delay, lkb_cb_list) {
|
|
list_del_init(&lkb->lkb_cb_list);
|
|
queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work);
|
|
count++;
|
|
}
|
|
mutex_unlock(&ls->ls_cb_mutex);
|
|
|
|
if (count)
|
|
log_rinfo(ls, "dlm_callback_resume %d", count);
|
|
}
|
|
|