Re: [PATCH 02/12] libceph: add CREATE osd operation support

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On Mon, Nov 17, 2014 at 10:56 AM, Yan, Zheng <zyan@xxxxxxxxxx> wrote:
> Signed-off-by: Yan, Zheng <zyan@xxxxxxxxxx>
> ---
>  net/ceph/osd_client.c | 42 ++++++++++++++++++++++--------------------
>  1 file changed, 22 insertions(+), 20 deletions(-)
>
> diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
> index f8fb376..b991fb6 100644
> --- a/net/ceph/osd_client.c
> +++ b/net/ceph/osd_client.c
> @@ -476,8 +476,7 @@ void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
>         size_t payload_len = 0;
>
>         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
> -              opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
> -              opcode != CEPH_OSD_OP_TRUNCATE);
> +              opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE);
>
>         op->extent.offset = offset;
>         op->extent.length = length;
> @@ -654,7 +653,6 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
>         case CEPH_OSD_OP_READ:
>         case CEPH_OSD_OP_WRITE:
>         case CEPH_OSD_OP_ZERO:
> -       case CEPH_OSD_OP_DELETE:
>         case CEPH_OSD_OP_TRUNCATE:
>                 if (src->op == CEPH_OSD_OP_WRITE)
>                         request_data_len = src->extent.length;
> @@ -714,6 +712,9 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
>                 ceph_osdc_msg_data_add(req->r_request, osd_data);
>                 request_data_len = osd_data->pagelist->length;
>                 break;
> +       case CEPH_OSD_OP_CREATE:
> +       case CEPH_OSD_OP_DELETE:
> +               break;
>         default:
>                 pr_err("unsupported osd opcode %s\n",
>                         ceph_osd_op_name(src->op));
> @@ -754,13 +755,11 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
>         u64 objnum = 0;
>         u64 objoff = 0;
>         u64 objlen = 0;
> -       u32 object_size;
> -       u64 object_base;
>         int r;
>
>         BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
> -              opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
> -              opcode != CEPH_OSD_OP_TRUNCATE);
> +              opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
> +              opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
>
>         req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
>                                         GFP_NOFS);
> @@ -776,21 +775,24 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
>                 return ERR_PTR(r);
>         }
>
> -       object_size = le32_to_cpu(layout->fl_object_size);
> -       object_base = off - objoff;
> -       if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
> -               if (truncate_size <= object_base) {
> -                       truncate_size = 0;
> -               } else {
> -                       truncate_size -= object_base;
> -                       if (truncate_size > object_size)
> -                               truncate_size = object_size;
> +       if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
> +               osd_req_op_init(req, 0, opcode);
> +       } else {
> +               u32 object_size = le32_to_cpu(layout->fl_object_size);
> +               u32 object_base = off - objoff;
> +               if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
> +                       if (truncate_size <= object_base) {
> +                               truncate_size = 0;
> +                       } else {
> +                               truncate_size -= object_base;
> +                               if (truncate_size > object_size)
> +                                       truncate_size = object_size;
> +                       }
>                 }
> -       }
> -
> -       osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
> -                               truncate_size, truncate_seq);
>
> +               osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
> +                                      truncate_size, truncate_seq);
> +       }
>         /*
>          * A second op in the ops array means the caller wants to
>          * also issue a include a 'startsync' command so that the

Amended changelog to also mention CEPH_OSD_OP_DELETE change:

"Add CEPH_OSD_OP_CREATE support.  Also change libceph to not treat
 CEPH_OSD_OP_DELETE as an extent op and add an assert to that end."

Reviewed-by: Ilya Dryomov <idryomov@xxxxxxxxxx>

Thanks,

                Ilya
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