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Subject[PATCH 11/18] libosd: Add Flush and List-objects support
Date
Add support for the various List-objects commands. List-partitions-in-device,
List-collections-in-partition, List-objects-in-partition,
List-objects-in-collection. All these support partial listing and continuation.

Add support for the different Flush commands and options.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Reviewed-by: Benny Halevy <bhalevy@panasas.com>
---
drivers/scsi/osd/osd_initiator.c | 124 ++++++++++++++++++++++++++++++++++++++
1 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 03f71c5..91f58fd 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -100,6 +100,16 @@ static bool _osd_req_is_alist_type(struct osd_request *or,
}
}

+/* This is for List-objects not Attributes-Lists */
+static void _osd_req_encode_olist(struct osd_request *or,
+ struct osd_obj_id_list *list)
+{
+ struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
+
+ cdbh->v1.list_identifier = list->list_identifier;
+ cdbh->v1.start_address = list->continuation_id;
+}
+
static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
u64 offset, unsigned *padding)
{
@@ -336,6 +346,29 @@ void osd_req_format(struct osd_request *or, u64 tot_capacity)
}
EXPORT_SYMBOL(osd_req_format);

+int osd_req_list_dev_partitions(struct osd_request *or,
+ osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
+{
+ return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
+}
+EXPORT_SYMBOL(osd_req_list_dev_partitions);
+
+static void _osd_req_encode_flush(struct osd_request *or,
+ enum osd_options_flush_scope_values op)
+{
+ struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
+
+ ocdb->command_specific_options = op;
+}
+
+void osd_req_flush_obsd(struct osd_request *or,
+ enum osd_options_flush_scope_values op)
+{
+ _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
+ _osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_obsd);
+
/*
* Partition commands
*/
@@ -362,6 +395,88 @@ void osd_req_remove_partition(struct osd_request *or, osd_id partition)
}
EXPORT_SYMBOL(osd_req_remove_partition);

+static int _osd_req_list_objects(struct osd_request *or,
+ __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
+ struct osd_obj_id_list *list, unsigned nelem)
+{
+ struct request_queue *q = or->osd_dev->scsi_device->request_queue;
+ u64 len = nelem * sizeof(osd_id) + sizeof(*list);
+ struct bio *bio;
+
+ _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
+
+ if (list->list_identifier)
+ _osd_req_encode_olist(or, list);
+
+ WARN_ON(or->in.bio);
+ bio = bio_map_kern(q, list, len, or->alloc_flags);
+ if (!bio) {
+ OSD_ERR("!!! Failed to allocate list_objects BIO\n");
+ return -ENOMEM;
+ }
+
+ bio->bi_rw &= ~(1 << BIO_RW);
+ or->in.bio = bio;
+ or->in.total_bytes = bio->bi_size;
+ return 0;
+}
+
+int osd_req_list_partition_collections(struct osd_request *or,
+ osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+ unsigned nelem)
+{
+ struct osd_obj_id par = {
+ .partition = partition,
+ .id = 0,
+ };
+
+ return osd_req_list_collection_objects(or, &par, initial_id, list,
+ nelem);
+}
+EXPORT_SYMBOL(osd_req_list_partition_collections);
+
+int osd_req_list_partition_objects(struct osd_request *or,
+ osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
+ unsigned nelem)
+{
+ struct osd_obj_id par = {
+ .partition = partition,
+ .id = 0,
+ };
+
+ return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
+ nelem);
+}
+EXPORT_SYMBOL(osd_req_list_partition_objects);
+
+void osd_req_flush_partition(struct osd_request *or,
+ osd_id partition, enum osd_options_flush_scope_values op)
+{
+ _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
+ _osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_partition);
+
+/*
+ * Collection commands
+ */
+int osd_req_list_collection_objects(struct osd_request *or,
+ const struct osd_obj_id *obj, osd_id initial_id,
+ struct osd_obj_id_list *list, unsigned nelem)
+{
+ return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
+ initial_id, list, nelem);
+}
+EXPORT_SYMBOL(osd_req_list_collection_objects);
+
+void osd_req_flush_collection(struct osd_request *or,
+ const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
+{
+ _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
+ _osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_collection);
+
/*
* Object commands
*/
@@ -388,6 +503,15 @@ void osd_req_write(struct osd_request *or,
}
EXPORT_SYMBOL(osd_req_write);

+void osd_req_flush_object(struct osd_request *or,
+ const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
+ /*V2*/ u64 offset, /*V2*/ u64 len)
+{
+ _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
+ _osd_req_encode_flush(or, op);
+}
+EXPORT_SYMBOL(osd_req_flush_object);
+
void osd_req_read(struct osd_request *or,
const struct osd_obj_id *obj, struct bio *bio, u64 offset)
{
--
1.6.0.1


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