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[SCSI] libosd: Add Flush and List-objects support

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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>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh 2009-01-25 17:05:07 +02:00 committed by James Bottomley
parent 345c435dbb
commit 3e08613037
1 changed files with 124 additions and 0 deletions
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124
drivers/scsi/osd/osd_initiator.c
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@ -104,6 +104,16 @@ 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)
{
@ -340,6 +350,29 @@ 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
*/
@ -366,6 +399,88 @@ 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
*/
@ -392,6 +507,15 @@ 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)
{