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authorAlexander Aring <aahringo@redhat.com>2022-04-04 23:06:46 +0300
committerDavid Teigland <teigland@redhat.com>2022-04-06 22:03:01 +0300
commit2c3fa6ae4d520d59727dac33a3e14d42f3dd36d8 (patch)
treec4ddab6fb85656e2274f910aaf476a151273a8e0 /fs/dlm
parent401597485cfc702ee75c4dc73345dcfcdb002d04 (diff)
downloadlinux-2c3fa6ae4d520d59727dac33a3e14d42f3dd36d8.tar.xz
dlm: check required context while close
This patch adds a WARN_ON() check to validate the right context while dlm_midcomms_close() is called. Even before commit 489d8e559c65 ("fs: dlm: add reliable connection if reconnect") in this context dlm_lowcomms_close() flushes all ongoing transmission triggered by dlm application stack. If we do that, it's required that no new message will be triggered by the dlm application stack. The function dlm_midcomms_close() is not called often so we can check if all lockspaces are in such context. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm')
-rw-r--r--fs/dlm/lockspace.c12
-rw-r--r--fs/dlm/lockspace.h1
-rw-r--r--fs/dlm/midcomms.c3
3 files changed, 16 insertions, 0 deletions
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 0d3833a124a3..19ed41a5da93 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -922,3 +922,15 @@ void dlm_stop_lockspaces(void)
log_print("dlm user daemon left %d lockspaces", count);
}
+void dlm_stop_lockspaces_check(void)
+{
+ struct dlm_ls *ls;
+
+ spin_lock(&lslist_lock);
+ list_for_each_entry(ls, &lslist, ls_list) {
+ if (WARN_ON(!rwsem_is_locked(&ls->ls_in_recovery) ||
+ !dlm_locking_stopped(ls)))
+ break;
+ }
+ spin_unlock(&lslist_lock);
+}
diff --git a/fs/dlm/lockspace.h b/fs/dlm/lockspace.h
index a78d853b9342..306fc4f4ea15 100644
--- a/fs/dlm/lockspace.h
+++ b/fs/dlm/lockspace.h
@@ -19,6 +19,7 @@ struct dlm_ls *dlm_find_lockspace_local(void *id);
struct dlm_ls *dlm_find_lockspace_device(int minor);
void dlm_put_lockspace(struct dlm_ls *ls);
void dlm_stop_lockspaces(void);
+void dlm_stop_lockspaces_check(void);
#endif /* __LOCKSPACE_DOT_H__ */
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c
index 649efe120eee..6489bc22ad61 100644
--- a/fs/dlm/midcomms.c
+++ b/fs/dlm/midcomms.c
@@ -135,6 +135,7 @@
#include <net/tcp.h>
#include "dlm_internal.h"
+#include "lockspace.h"
#include "lowcomms.h"
#include "config.h"
#include "memory.h"
@@ -1412,6 +1413,8 @@ int dlm_midcomms_close(int nodeid)
if (nodeid == dlm_our_nodeid())
return 0;
+ dlm_stop_lockspaces_check();
+
idx = srcu_read_lock(&nodes_srcu);
/* Abort pending close/remove operation */
node = nodeid2node(nodeid, 0);