[PATCH v3] libceph: introduce new option abort_on_full

[Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>]

Introduce a new option abort_on_full, default to false. Then
we can get -ENOSPC when the pool is full, or reaches quota.
---
 fs/ceph/super.c              |  2 +-
 include/linux/ceph/libceph.h |  1 +
 net/ceph/ceph_common.c       | 10 ++++++++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index b5ecd6f..f97857a 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -632,6 +632,7 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
 		goto fail;
 	}
 
+	opt->flags |= CEPH_OPT_ABORTONFULL;
 	fsc->client = ceph_create_client(opt, fsc);
 	if (IS_ERR(fsc->client)) {
 		err = PTR_ERR(fsc->client);
@@ -640,7 +641,6 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
 	opt = NULL; /* fsc->client now owns this */
 
 	fsc->client->extra_mon_dispatch = extra_mon_dispatch;
-	fsc->client->osdc.abort_on_full = true;
 
 	if (!fsopt->mds_namespace) {
 		ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 68bb09c..0fc40bb7 100644
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -35,6 +35,7 @@
 #define CEPH_OPT_NOMSGAUTH	  (1<<4) /* don't require msg signing feat */
 #define CEPH_OPT_TCP_NODELAY	  (1<<5) /* TCP_NODELAY on TCP sockets */
 #define CEPH_OPT_NOMSGSIGN	  (1<<6) /* don't sign msgs */
+#define CEPH_OPT_ABORTONFULL	  (1<<7) /* abort request with -ENOSPC when pool is full */
 
 #define CEPH_OPT_DEFAULT   (CEPH_OPT_TCP_NODELAY)
 
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 87afb9e..9932251 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -255,6 +255,7 @@ enum {
 	Opt_nocephx_sign_messages,
 	Opt_tcp_nodelay,
 	Opt_notcp_nodelay,
+	Opt_abort_on_full,
 };
 
 static match_table_t opt_tokens = {
@@ -280,6 +281,7 @@ enum {
 	{Opt_nocephx_sign_messages, "nocephx_sign_messages"},
 	{Opt_tcp_nodelay, "tcp_nodelay"},
 	{Opt_notcp_nodelay, "notcp_nodelay"},
+	{Opt_abort_on_full, "abort_on_full"},
 	{-1, NULL}
 };
 
@@ -535,6 +537,10 @@ struct ceph_options *
 			opt->flags &= ~CEPH_OPT_TCP_NODELAY;
 			break;
 
+		case Opt_abort_on_full:
+			opt->flags |= CEPH_OPT_ABORTONFULL;
+			break;
+
 		default:
 			BUG_ON(token);
 		}
@@ -574,6 +580,8 @@ int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
 		seq_puts(m, "nocephx_sign_messages,");
 	if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
 		seq_puts(m, "notcp_nodelay,");
+	if (opt->flags & CEPH_OPT_ABORTONFULL)
+		seq_puts(m, "abort_on_full,");
 
 	if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
 		seq_printf(m, "mount_timeout=%d,",
@@ -653,6 +661,8 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
 	if (err < 0)
 		goto fail_monc;
 
+	if (ceph_test_opt(client, ABORTONFULL))
+		client->osdc.abort_on_full = true;
 	return client;
 
 fail_monc:
-- 
1.8.3.1