[PATCH] rbd: 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.

Signed-off-by: Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>
---
 drivers/block/rbd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 8e5140b..7cd35e2 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -744,6 +744,7 @@ enum {
 	Opt_lock_on_read,
 	Opt_exclusive,
 	Opt_notrim,
+	Opt_abort_on_full,
 	Opt_err
 };
 
@@ -760,6 +761,7 @@ enum {
 	{Opt_lock_on_read, "lock_on_read"},
 	{Opt_exclusive, "exclusive"},
 	{Opt_notrim, "notrim"},
+	{Opt_abort_on_full, "abort_on_full"},
 	{Opt_err, NULL}
 };
 
@@ -770,6 +772,7 @@ struct rbd_options {
 	bool	lock_on_read;
 	bool	exclusive;
 	bool	trim;
+	bool	abort_on_full;
 };
 
 #define RBD_QUEUE_DEPTH_DEFAULT	BLKDEV_MAX_RQ
@@ -778,6 +781,7 @@ struct rbd_options {
 #define RBD_LOCK_ON_READ_DEFAULT false
 #define RBD_EXCLUSIVE_DEFAULT	false
 #define RBD_TRIM_DEFAULT	true
+#define RBD_ABORT_ON_FULL_DEFAULT false
 
 struct parse_rbd_opts_ctx {
 	struct rbd_spec		*spec;
@@ -841,6 +845,9 @@ static int parse_rbd_opts_token(char *c, void *private)
 	case Opt_notrim:
 		pctx->opts->trim = false;
 		break;
+	case Opt_abort_on_full:
+		pctx->opts->abort_on_full = true;
+		break;
 	default:
 		/* libceph prints "bad option" msg */
 		return -EINVAL;
@@ -5393,6 +5400,7 @@ static int rbd_add_parse_args(const char *buf,
 	pctx.opts->lock_on_read = RBD_LOCK_ON_READ_DEFAULT;
 	pctx.opts->exclusive = RBD_EXCLUSIVE_DEFAULT;
 	pctx.opts->trim = RBD_TRIM_DEFAULT;
+	pctx.opts->abort_on_full = RBD_ABORT_ON_FULL_DEFAULT;
 
 	copts = ceph_parse_options(options, mon_addrs,
 				   mon_addrs + mon_addrs_size - 1,
@@ -5851,6 +5859,8 @@ static ssize_t do_rbd_add(struct bus_type *bus,
 		goto err_out_args;
 	}
 
+	rbdc->client->osdc.abort_on_full = rbd_opts->abort_on_full;
+
 	/* pick the pool */
 	rc = ceph_pg_poolid_by_name(rbdc->client->osdc.osdmap, spec->pool_name);
 	if (rc < 0) {
-- 
1.8.3.1