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fs: dlm: rename stub to local message flag 

This patch renames DLM_IFL_STUB_MS to DLM_IFL_LOCAL_MS flag. The
DLM_IFL_STUB_MS flag is somewhat misnamed, it means the dlm message is
used for local message transfer only. It is used by recovery to resolve
lock states if a node got fenced.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2023-03-06 15:48:12 -05:00 committed by David Teigland
parent 01c7a59789
commit a7e7ffacad
4 changed files with 60 additions and 60 deletions
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8
fs/dlm/dlm_internal.h
View File

@ -203,7 +203,7 @@ struct dlm_args {
#define DLM_IFL_OVERLAP_CANCEL 0x00100000
#define DLM_IFL_ENDOFLIFE 0x00200000
#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
#define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */
#define DLM_IFL_LOCAL_MS 0x02000000 /* magic number for m_flags */
#define DLM_IFL_CB_PENDING_BIT 0
@ -593,9 +593,9 @@ struct dlm_ls {
int ls_slots_size;
struct dlm_slot *ls_slots;
struct dlm_rsb ls_stub_rsb; /* for returning errors */
struct dlm_lkb ls_stub_lkb; /* for returning errors */
struct dlm_message ls_stub_ms; /* for faking a reply */
struct dlm_rsb ls_local_rsb; /* for returning errors */
struct dlm_lkb ls_local_lkb; /* for returning errors */
struct dlm_message ls_local_ms; /* for faking a reply */
struct dentry *ls_debug_rsb_dentry; /* debugfs */
struct dentry *ls_debug_waiters_dentry; /* debugfs */

106
fs/dlm/lock.c
View File

@ -1558,7 +1558,7 @@ static int remove_from_waiters(struct dlm_lkb *lkb, int mstype)
return error;
}
/* Handles situations where we might be processing a "fake" or "stub" reply in
/* Handles situations where we might be processing a "fake" or "local" reply in
which we can't try to take waiters_mutex again. */
static int remove_from_waiters_ms(struct dlm_lkb *lkb, struct dlm_message *ms)
@ -1566,10 +1566,10 @@ static int remove_from_waiters_ms(struct dlm_lkb *lkb, struct dlm_message *ms)
struct dlm_ls *ls = lkb->lkb_resource->res_ls;
int error;
if (ms->m_flags != cpu_to_le32(DLM_IFL_STUB_MS))
if (ms->m_flags != cpu_to_le32(DLM_IFL_LOCAL_MS))
mutex_lock(&ls->ls_waiters_mutex);
error = _remove_from_waiters(lkb, le32_to_cpu(ms->m_type), ms);
if (ms->m_flags != cpu_to_le32(DLM_IFL_STUB_MS))
if (ms->m_flags != cpu_to_le32(DLM_IFL_LOCAL_MS))
mutex_unlock(&ls->ls_waiters_mutex);
return error;
}
@ -3486,10 +3486,10 @@ static int send_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
/* down conversions go without a reply from the master */
if (!error && down_conversion(lkb)) {
remove_from_waiters(lkb, DLM_MSG_CONVERT_REPLY);
r->res_ls->ls_stub_ms.m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
r->res_ls->ls_stub_ms.m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
r->res_ls->ls_stub_ms.m_result = 0;
__receive_convert_reply(r, lkb, &r->res_ls->ls_stub_ms);
r->res_ls->ls_local_ms.m_flags = cpu_to_le32(DLM_IFL_LOCAL_MS);
r->res_ls->ls_local_ms.m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
r->res_ls->ls_local_ms.m_result = 0;
__receive_convert_reply(r, lkb, &r->res_ls->ls_local_ms);
}
return error;
@ -3648,7 +3648,7 @@ static int send_cancel_reply(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
static int send_lookup_reply(struct dlm_ls *ls, struct dlm_message *ms_in,
int ret_nodeid, int rv)
{
struct dlm_rsb *r = &ls->ls_stub_rsb;
struct dlm_rsb *r = &ls->ls_local_rsb;
struct dlm_message *ms;
struct dlm_mhandle *mh;
int error, nodeid = le32_to_cpu(ms_in->m_header.h_nodeid);
@ -3681,7 +3681,7 @@ static void receive_flags(struct dlm_lkb *lkb, struct dlm_message *ms)
static void receive_flags_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
{
if (ms->m_flags == cpu_to_le32(DLM_IFL_STUB_MS))
if (ms->m_flags == cpu_to_le32(DLM_IFL_LOCAL_MS))
return;
lkb->lkb_sbflags = le32_to_cpu(ms->m_sbflags);
@ -3768,12 +3768,12 @@ static int receive_unlock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
return 0;
}
/* We fill in the stub-lkb fields with the info that send_xxxx_reply()
/* We fill in the local-lkb fields with the info that send_xxxx_reply()
uses to send a reply and that the remote end uses to process the reply. */
static void setup_stub_lkb(struct dlm_ls *ls, struct dlm_message *ms)
static void setup_local_lkb(struct dlm_ls *ls, struct dlm_message *ms)
{
struct dlm_lkb *lkb = &ls->ls_stub_lkb;
struct dlm_lkb *lkb = &ls->ls_local_lkb;
lkb->lkb_nodeid = le32_to_cpu(ms->m_header.h_nodeid);
lkb->lkb_remid = le32_to_cpu(ms->m_lkid);
}
@ -3906,8 +3906,8 @@ static int receive_request(struct dlm_ls *ls, struct dlm_message *ms)
le32_to_cpu(ms->m_lkid), from_nodeid, error);
}
setup_stub_lkb(ls, ms);
send_request_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
setup_local_lkb(ls, ms);
send_request_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
return error;
}
@ -3962,8 +3962,8 @@ static int receive_convert(struct dlm_ls *ls, struct dlm_message *ms)
return 0;
fail:
setup_stub_lkb(ls, ms);
send_convert_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
setup_local_lkb(ls, ms);
send_convert_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
return error;
}
@ -4014,8 +4014,8 @@ static int receive_unlock(struct dlm_ls *ls, struct dlm_message *ms)
return 0;
fail:
setup_stub_lkb(ls, ms);
send_unlock_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
setup_local_lkb(ls, ms);
send_unlock_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
return error;
}
@ -4050,8 +4050,8 @@ static int receive_cancel(struct dlm_ls *ls, struct dlm_message *ms)
return 0;
fail:
setup_stub_lkb(ls, ms);
send_cancel_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
setup_local_lkb(ls, ms);
send_cancel_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
return error;
}
@ -4403,7 +4403,7 @@ static void _receive_convert_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
if (error)
goto out;
/* stub reply can happen with waiters_mutex held */
/* local reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
goto out;
@ -4440,7 +4440,7 @@ static void _receive_unlock_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
if (error)
goto out;
/* stub reply can happen with waiters_mutex held */
/* local reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
goto out;
@ -4490,7 +4490,7 @@ static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
if (error)
goto out;
/* stub reply can happen with waiters_mutex held */
/* local reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
goto out;
@ -4834,16 +4834,16 @@ void dlm_receive_buffer(union dlm_packet *p, int nodeid)
}
static void recover_convert_waiter(struct dlm_ls *ls, struct dlm_lkb *lkb,
struct dlm_message *ms_stub)
struct dlm_message *ms_local)
{
if (middle_conversion(lkb)) {
hold_lkb(lkb);
memset(ms_stub, 0, sizeof(struct dlm_message));
ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
ms_stub->m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
ms_stub->m_result = cpu_to_le32(to_dlm_errno(-EINPROGRESS));
ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_convert_reply(lkb, ms_stub);
memset(ms_local, 0, sizeof(struct dlm_message));
ms_local->m_flags = cpu_to_le32(DLM_IFL_LOCAL_MS);
ms_local->m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
ms_local->m_result = cpu_to_le32(to_dlm_errno(-EINPROGRESS));
ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_convert_reply(lkb, ms_local);
/* Same special case as in receive_rcom_lock_args() */
lkb->lkb_grmode = DLM_LOCK_IV;
@ -4882,12 +4882,12 @@ static int waiter_needs_recovery(struct dlm_ls *ls, struct dlm_lkb *lkb,
void dlm_recover_waiters_pre(struct dlm_ls *ls)
{
struct dlm_lkb *lkb, *safe;
struct dlm_message *ms_stub;
int wait_type, stub_unlock_result, stub_cancel_result;
struct dlm_message *ms_local;
int wait_type, local_unlock_result, local_cancel_result;
int dir_nodeid;
ms_stub = kmalloc(sizeof(*ms_stub), GFP_KERNEL);
if (!ms_stub)
ms_local = kmalloc(sizeof(*ms_local), GFP_KERNEL);
if (!ms_local)
return;
mutex_lock(&ls->ls_waiters_mutex);
@ -4923,8 +4923,8 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
continue;
wait_type = lkb->lkb_wait_type;
stub_unlock_result = -DLM_EUNLOCK;
stub_cancel_result = -DLM_ECANCEL;
local_unlock_result = -DLM_EUNLOCK;
local_cancel_result = -DLM_ECANCEL;
/* Main reply may have been received leaving a zero wait_type,
but a reply for the overlapping op may not have been
@ -4935,17 +4935,17 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
if (is_overlap_cancel(lkb)) {
wait_type = DLM_MSG_CANCEL;
if (lkb->lkb_grmode == DLM_LOCK_IV)
stub_cancel_result = 0;
local_cancel_result = 0;
}
if (is_overlap_unlock(lkb)) {
wait_type = DLM_MSG_UNLOCK;
if (lkb->lkb_grmode == DLM_LOCK_IV)
stub_unlock_result = -ENOENT;
local_unlock_result = -ENOENT;
}
log_debug(ls, "rwpre overlap %x %x %d %d %d",
lkb->lkb_id, lkb->lkb_flags, wait_type,
stub_cancel_result, stub_unlock_result);
local_cancel_result, local_unlock_result);
}
switch (wait_type) {
@ -4955,28 +4955,28 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
break;
case DLM_MSG_CONVERT:
recover_convert_waiter(ls, lkb, ms_stub);
recover_convert_waiter(ls, lkb, ms_local);
break;
case DLM_MSG_UNLOCK:
hold_lkb(lkb);
memset(ms_stub, 0, sizeof(struct dlm_message));
ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
ms_stub->m_type = cpu_to_le32(DLM_MSG_UNLOCK_REPLY);
ms_stub->m_result = cpu_to_le32(to_dlm_errno(stub_unlock_result));
ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_unlock_reply(lkb, ms_stub);
memset(ms_local, 0, sizeof(struct dlm_message));
ms_local->m_flags = cpu_to_le32(DLM_IFL_LOCAL_MS);
ms_local->m_type = cpu_to_le32(DLM_MSG_UNLOCK_REPLY);
ms_local->m_result = cpu_to_le32(to_dlm_errno(local_unlock_result));
ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_unlock_reply(lkb, ms_local);
dlm_put_lkb(lkb);
break;
case DLM_MSG_CANCEL:
hold_lkb(lkb);
memset(ms_stub, 0, sizeof(struct dlm_message));
ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
ms_stub->m_type = cpu_to_le32(DLM_MSG_CANCEL_REPLY);
ms_stub->m_result = cpu_to_le32(to_dlm_errno(stub_cancel_result));
ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_cancel_reply(lkb, ms_stub);
memset(ms_local, 0, sizeof(struct dlm_message));
ms_local->m_flags = cpu_to_le32(DLM_IFL_LOCAL_MS);
ms_local->m_type = cpu_to_le32(DLM_MSG_CANCEL_REPLY);
ms_local->m_result = cpu_to_le32(to_dlm_errno(local_cancel_result));
ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
_receive_cancel_reply(lkb, ms_local);
dlm_put_lkb(lkb);
break;
@ -4987,7 +4987,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
schedule();
}
mutex_unlock(&ls->ls_waiters_mutex);
kfree(ms_stub);
kfree(ms_local);
}
static struct dlm_lkb *find_resend_waiter(struct dlm_ls *ls)

4
fs/dlm/lockspace.c
View File

@ -529,8 +529,8 @@ static int new_lockspace(const char *name, const char *cluster,
ls->ls_total_weight = 0;
ls->ls_node_array = NULL;
memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb));
ls->ls_stub_rsb.res_ls = ls;
memset(&ls->ls_local_rsb, 0, sizeof(struct dlm_rsb));
ls->ls_local_rsb.res_ls = ls;
ls->ls_debug_rsb_dentry = NULL;
ls->ls_debug_waiters_dentry = NULL;

2
include/trace/events/dlm.h
View File

@ -54,7 +54,7 @@
{ DLM_IFL_OVERLAP_CANCEL, "OVERLAP_CANCEL" }, \
{ DLM_IFL_ENDOFLIFE, "ENDOFLIFE" }, \
{ DLM_IFL_DEADLOCK_CANCEL, "DEADLOCK_CANCEL" }, \
{ DLM_IFL_STUB_MS, "STUB_MS" }, \
{ DLM_IFL_LOCAL_MS, "LOCAL_MS" }, \
{ DLM_IFL_USER, "USER" }, \
{ DLM_IFL_ORPHAN, "ORPHAN" })