The patch titled
Subject: ocfs2/dlm: use bitmap API instead of hand-writing it
has been added to the -mm mm-nonmm-unstable branch. Its filename is
ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Subject: ocfs2/dlm: use bitmap API instead of hand-writing it
Date: Fri, 7 Oct 2022 20:48:46 +0800
Use bitmap_zero/bitmap_copy/bitmap_qeual directly for bitmap operations.
Link: https://lkml.kernel.org/r/20221007124846.186453-3-joseph.qi@xxxxxxxxxxxxxxxxx
Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlm/dlmcommon.h | 2 +-
fs/ocfs2/dlm/dlmdomain.c | 17 +++++++----------
fs/ocfs2/dlm/dlmmaster.c | 30 +++++++++++++++---------------
fs/ocfs2/dlm/dlmrecovery.c | 2 +-
4 files changed, 24 insertions(+), 27 deletions(-)
--- a/fs/ocfs2/dlm/dlmcommon.h~ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it
+++ a/fs/ocfs2/dlm/dlmcommon.h
@@ -1094,7 +1094,7 @@ static inline enum dlm_status dlm_err_to
static inline void dlm_node_iter_init(unsigned long *map,
struct dlm_node_iter *iter)
{
- memcpy(iter->node_map, map, sizeof(iter->node_map));
+ bitmap_copy(iter->node_map, map, O2NM_MAX_NODES);
iter->curnode = -1;
}
--- a/fs/ocfs2/dlm/dlmdomain.c~ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it
+++ a/fs/ocfs2/dlm/dlmdomain.c
@@ -1576,8 +1576,8 @@ static int dlm_should_restart_join(struc
spin_lock(&dlm->spinlock);
/* For now, we restart the process if the node maps have
* changed at all */
- ret = memcmp(ctxt->live_map, dlm->live_nodes_map,
- sizeof(dlm->live_nodes_map));
+ ret = !bitmap_equal(ctxt->live_map, dlm->live_nodes_map,
+ O2NM_MAX_NODES);
spin_unlock(&dlm->spinlock);
if (ret)
@@ -1607,10 +1607,8 @@ static int dlm_try_to_join_domain(struct
o2hb_fill_node_map(dlm->live_nodes_map, O2NM_MAX_NODES);
spin_lock(&dlm->spinlock);
- memcpy(ctxt->live_map, dlm->live_nodes_map, sizeof(ctxt->live_map));
-
+ bitmap_copy(ctxt->live_map, dlm->live_nodes_map, O2NM_MAX_NODES);
__dlm_set_joining_node(dlm, dlm->node_num);
-
spin_unlock(&dlm->spinlock);
node = -1;
@@ -1643,8 +1641,7 @@ static int dlm_try_to_join_domain(struct
* yes_resp_map. Copy that into our domain map and send a join
* assert message to clean up everyone elses state. */
spin_lock(&dlm->spinlock);
- memcpy(dlm->domain_map, ctxt->yes_resp_map,
- sizeof(ctxt->yes_resp_map));
+ bitmap_copy(dlm->domain_map, ctxt->yes_resp_map, O2NM_MAX_NODES);
set_bit(dlm->node_num, dlm->domain_map);
spin_unlock(&dlm->spinlock);
@@ -2009,9 +2006,9 @@ static struct dlm_ctxt *dlm_alloc_ctxt(c
mlog(0, "dlm->recovery_map=%p, &(dlm->recovery_map[0])=%p\n",
dlm->recovery_map, &(dlm->recovery_map[0]));
- memset(dlm->recovery_map, 0, sizeof(dlm->recovery_map));
- memset(dlm->live_nodes_map, 0, sizeof(dlm->live_nodes_map));
- memset(dlm->domain_map, 0, sizeof(dlm->domain_map));
+ bitmap_zero(dlm->recovery_map, O2NM_MAX_NODES);
+ bitmap_zero(dlm->live_nodes_map, O2NM_MAX_NODES);
+ bitmap_zero(dlm->domain_map, O2NM_MAX_NODES);
dlm->dlm_thread_task = NULL;
dlm->dlm_reco_thread_task = NULL;
--- a/fs/ocfs2/dlm/dlmmaster.c~ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it
+++ a/fs/ocfs2/dlm/dlmmaster.c
@@ -258,12 +258,12 @@ static void dlm_init_mle(struct dlm_mast
mle->type = type;
INIT_HLIST_NODE(&mle->master_hash_node);
INIT_LIST_HEAD(&mle->hb_events);
- memset(mle->maybe_map, 0, sizeof(mle->maybe_map));
+ bitmap_zero(mle->maybe_map, O2NM_MAX_NODES);
spin_lock_init(&mle->spinlock);
init_waitqueue_head(&mle->wq);
atomic_set(&mle->woken, 0);
kref_init(&mle->mle_refs);
- memset(mle->response_map, 0, sizeof(mle->response_map));
+ bitmap_zero(mle->response_map, O2NM_MAX_NODES);
mle->master = O2NM_MAX_NODES;
mle->new_master = O2NM_MAX_NODES;
mle->inuse = 0;
@@ -290,8 +290,8 @@ static void dlm_init_mle(struct dlm_mast
atomic_inc(&dlm->mle_cur_count[mle->type]);
/* copy off the node_map and register hb callbacks on our copy */
- memcpy(mle->node_map, dlm->domain_map, sizeof(mle->node_map));
- memcpy(mle->vote_map, dlm->domain_map, sizeof(mle->vote_map));
+ bitmap_copy(mle->node_map, dlm->domain_map, O2NM_MAX_NODES);
+ bitmap_copy(mle->vote_map, dlm->domain_map, O2NM_MAX_NODES);
clear_bit(dlm->node_num, mle->vote_map);
clear_bit(dlm->node_num, mle->node_map);
@@ -572,7 +572,7 @@ static void dlm_init_lockres(struct dlm_
spin_unlock(&dlm->track_lock);
memset(res->lvb, 0, DLM_LVB_LEN);
- memset(res->refmap, 0, sizeof(res->refmap));
+ bitmap_zero(res->refmap, O2NM_MAX_NODES);
}
struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
@@ -1036,10 +1036,10 @@ recheck:
spin_lock(&mle->spinlock);
m = mle->master;
- map_changed = (memcmp(mle->vote_map, mle->node_map,
- sizeof(mle->vote_map)) != 0);
- voting_done = (memcmp(mle->vote_map, mle->response_map,
- sizeof(mle->vote_map)) == 0);
+ map_changed = !bitmap_equal(mle->vote_map, mle->node_map,
+ O2NM_MAX_NODES);
+ voting_done = bitmap_equal(mle->vote_map, mle->response_map,
+ O2NM_MAX_NODES);
/* restart if we hit any errors */
if (map_changed) {
@@ -1277,11 +1277,11 @@ static int dlm_restart_lock_mastery(stru
/* now blank out everything, as if we had never
* contacted anyone */
- memset(mle->maybe_map, 0, sizeof(mle->maybe_map));
- memset(mle->response_map, 0, sizeof(mle->response_map));
+ bitmap_zero(mle->maybe_map, O2NM_MAX_NODES);
+ bitmap_zero(mle->response_map, O2NM_MAX_NODES);
/* reset the vote_map to the current node_map */
- memcpy(mle->vote_map, mle->node_map,
- sizeof(mle->node_map));
+ bitmap_copy(mle->vote_map, mle->node_map,
+ O2NM_MAX_NODES);
/* put myself into the maybe map */
if (mle->type != DLM_MLE_BLOCK)
set_bit(dlm->node_num, mle->maybe_map);
@@ -2094,7 +2094,7 @@ static void dlm_assert_master_worker(str
flags = item->u.am.flags;
spin_lock(&dlm->spinlock);
- memcpy(nodemap, dlm->domain_map, sizeof(nodemap));
+ bitmap_copy(nodemap, dlm->domain_map, O2NM_MAX_NODES);
spin_unlock(&dlm->spinlock);
clear_bit(dlm->node_num, nodemap);
@@ -3447,7 +3447,7 @@ int dlm_finish_migration(struct dlm_ctxt
ret = 0;
}
- memset(iter.node_map, 0, sizeof(iter.node_map));
+ bitmap_zero(iter.node_map, O2NM_MAX_NODES);
set_bit(old_master, iter.node_map);
mlog(0, "doing assert master of %.*s back to %u\n",
res->lockname.len, res->lockname.name, old_master);
--- a/fs/ocfs2/dlm/dlmrecovery.c~ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it
+++ a/fs/ocfs2/dlm/dlmrecovery.c
@@ -733,7 +733,7 @@ static int dlm_init_recovery_area(struct
struct dlm_reco_node_data *ndata;
spin_lock(&dlm->spinlock);
- memcpy(dlm->reco.node_map, dlm->domain_map, sizeof(dlm->domain_map));
+ bitmap_copy(dlm->reco.node_map, dlm->domain_map, O2NM_MAX_NODES);
/* nodes can only be removed (by dying) after dropping
* this lock, and death will be trapped later, so this should do */
spin_unlock(&dlm->spinlock);
_
Patches currently in -mm which might be from joseph.qi@xxxxxxxxxxxxxxxxx are
ocfs2-fix-bug-when-iput-after-ocfs2_mknod-fails.patch
ocfs2-clear-dinode-links-count-in-case-of-error.patch
ocfs2-cluster-use-bitmap-api-instead-of-hand-writing-it.patch
ocfs2-use-bitmap-api-in-fill_node_map.patch
ocfs2-dlm-use-bitmap-api-instead-of-hand-writing-it.patch
