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authorJoel Becker <joel.becker@oracle.com>2009-09-02 17:17:36 -0700
committerJoel Becker <joel.becker@oracle.com>2010-05-10 11:50:10 -0700
commite4b963f10e9026c83419b5c25b93a0350413cf16 (patch)
treed162595c9f79626d040cb28c84e53fd8b7fe50ff /fs/ocfs2/super.c
parent0467ae954d1843de65e7cf8f706f88fe65cd8418 (diff)
downloadblackbird-op-linux-e4b963f10e9026c83419b5c25b93a0350413cf16.tar.gz
blackbird-op-linux-e4b963f10e9026c83419b5c25b93a0350413cf16.zip
ocfs2: Wrap signal blocking in void functions.
ocfs2 sometimes needs to block signals around dlm operations, but it currently does it with sigprocmask(). Even worse, it's checking the error code of sigprocmask(). The in-kernel sigprocmask() can only error if you get the SIG_* argument wrong. We don't. Wrap the sigprocmask() calls with ocfs2_[un]block_signals(). These functions are void, but they will BUG() if somehow sigprocmask() returns an error. Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/super.c')
-rw-r--r--fs/ocfs2/super.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 12c2203a62fe..cf6d87b57450 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -2560,5 +2560,25 @@ void __ocfs2_abort(struct super_block* sb,
ocfs2_handle_error(sb);
}
+/*
+ * Void signal blockers, because in-kernel sigprocmask() only fails
+ * when SIG_* is wrong.
+ */
+void ocfs2_block_signals(sigset_t *oldset)
+{
+ int rc;
+ sigset_t blocked;
+
+ sigfillset(&blocked);
+ rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
+ BUG_ON(rc);
+}
+
+void ocfs2_unblock_signals(sigset_t *oldset)
+{
+ int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
+ BUG_ON(rc);
+}
+
module_init(ocfs2_init);
module_exit(ocfs2_exit);
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