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rbd: incorporate ceph_object_extent 

obj_req->object_no -> obj_req->ex.oe_objno
obj_req->offset -> obj_req->ex.oe_off
obj_req->length -> obj_req->ex.oe_len

... and use ex for linking object requests to image requests.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2018-02-02 15:23:22 +01:00
parent 08c1ac508b
commit 43df3d35c0
1 changed files with 34 additions and 37 deletions
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71
drivers/block/rbd.c
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@ -32,6 +32,7 @@
#include <linux/ceph/osd_client.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/cls_lock_client.h>
#include <linux/ceph/striper.h>
#include <linux/ceph/decode.h>
#include <linux/parser.h>
#include <linux/bsearch.h>
@ -245,9 +246,7 @@ enum rbd_obj_write_state {
};
struct rbd_obj_request {
u64 object_no;
u64 offset; /* object start byte */
u64 length; /* bytes from offset */
struct ceph_object_extent ex;
union {
bool tried_parent; /* for reads */
enum rbd_obj_write_state write_state; /* for writes */
@ -255,8 +254,6 @@ struct rbd_obj_request {
struct rbd_img_request *img_request;
u64 img_offset;
/* links for img_request->obj_requests list */
struct list_head links;
union {
struct ceph_bio_iter bio_pos;
@ -300,17 +297,17 @@ struct rbd_img_request {
u64 xferred;/* aggregate bytes transferred */
int result; /* first nonzero obj_request result */
struct list_head object_extents; /* obj_req.ex structs */
u32 obj_request_count;
u32 pending_count;
struct list_head obj_requests; /* rbd_obj_request structs */
struct kref kref;
};
#define for_each_obj_request(ireq, oreq) \
list_for_each_entry(oreq, &(ireq)->obj_requests, links)
list_for_each_entry(oreq, &(ireq)->object_extents, ex.oe_item)
#define for_each_obj_request_safe(ireq, oreq, n) \
list_for_each_entry_safe_reverse(oreq, n, &(ireq)->obj_requests, links)
list_for_each_entry_safe(oreq, n, &(ireq)->object_extents, ex.oe_item)
enum rbd_watch_state {
RBD_WATCH_STATE_UNREGISTERED,
@ -1336,7 +1333,7 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request,
obj_request->img_request = img_request;
img_request->obj_request_count++;
img_request->pending_count++;
list_add_tail(&obj_request->links, &img_request->obj_requests);
list_add_tail(&obj_request->ex.oe_item, &img_request->object_extents);
dout("%s: img %p obj %p\n", __func__, img_request, obj_request);
}
@ -1344,7 +1341,7 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request,
struct rbd_obj_request *obj_request)
{
dout("%s: img %p obj %p\n", __func__, img_request, obj_request);
list_del(&obj_request->links);
list_del(&obj_request->ex.oe_item);
rbd_assert(img_request->obj_request_count > 0);
img_request->obj_request_count--;
rbd_assert(obj_request->img_request == img_request);
@ -1356,8 +1353,8 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request)
struct ceph_osd_request *osd_req = obj_request->osd_req;
dout("%s %p object_no %016llx %llu~%llu osd_req %p\n", __func__,
obj_request, obj_request->object_no, obj_request->offset,
obj_request->length, osd_req);
obj_request, obj_request->ex.oe_objno, obj_request->ex.oe_off,
obj_request->ex.oe_len, osd_req);
ceph_osdc_start_request(osd_req->r_osdc, osd_req, false);
}
@ -1406,15 +1403,15 @@ static bool rbd_obj_is_entire(struct rbd_obj_request *obj_req)
{
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
return !obj_req->offset &&
obj_req->length == rbd_dev->layout.object_size;
return !obj_req->ex.oe_off &&
obj_req->ex.oe_len == rbd_dev->layout.object_size;
}
static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req)
{
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
return obj_req->offset + obj_req->length ==
return obj_req->ex.oe_off + obj_req->ex.oe_len ==
rbd_dev->layout.object_size;
}
@ -1469,7 +1466,7 @@ static void rbd_osd_req_format_write(struct rbd_obj_request *obj_request)
osd_req->r_flags = CEPH_OSD_FLAG_WRITE;
ktime_get_real_ts(&osd_req->r_mtime);
osd_req->r_data_offset = obj_request->offset;
osd_req->r_data_offset = obj_request->ex.oe_off;
}
static struct ceph_osd_request *
@ -1493,7 +1490,7 @@ rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops)
req->r_base_oloc.pool = rbd_dev->layout.pool_id;
if (ceph_oid_aprintf(&req->r_base_oid, GFP_NOIO, name_format,
rbd_dev->header.object_prefix, obj_req->object_no))
rbd_dev->header.object_prefix, obj_req->ex.oe_objno))
goto err_req;
if (ceph_osdc_alloc_messages(req, GFP_NOIO))
@ -1519,7 +1516,7 @@ static struct rbd_obj_request *rbd_obj_request_create(void)
if (!obj_request)
return NULL;
INIT_LIST_HEAD(&obj_request->links);
ceph_object_extent_init(&obj_request->ex);
kref_init(&obj_request->kref);
dout("%s %p\n", __func__, obj_request);
@ -1650,7 +1647,7 @@ static struct rbd_img_request *rbd_img_request_create(
img_request_layered_set(img_request);
spin_lock_init(&img_request->completion_lock);
INIT_LIST_HEAD(&img_request->obj_requests);
INIT_LIST_HEAD(&img_request->object_extents);
kref_init(&img_request->kref);
dout("%s: rbd_dev %p %s %llu/%llu -> img %p\n", __func__, rbd_dev,
@ -1727,11 +1724,11 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which)
case OBJ_REQUEST_BIO:
osd_req_op_extent_osd_data_bio(obj_req->osd_req, which,
&obj_req->bio_pos,
obj_req->length);
obj_req->ex.oe_len);
break;
case OBJ_REQUEST_BVECS:
rbd_assert(obj_req->bvec_pos.iter.bi_size ==
obj_req->length);
obj_req->ex.oe_len);
osd_req_op_extent_osd_data_bvec_pos(obj_req->osd_req, which,
&obj_req->bvec_pos);
break;
@ -1747,7 +1744,7 @@ static int rbd_obj_setup_read(struct rbd_obj_request *obj_req)
return -ENOMEM;
osd_req_op_extent_init(obj_req->osd_req, 0, CEPH_OSD_OP_READ,
obj_req->offset, obj_req->length, 0, 0);
obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0);
rbd_osd_req_setup_data(obj_req, 0);
rbd_osd_req_format_read(obj_req);
@ -1794,7 +1791,7 @@ static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req,
opcode = CEPH_OSD_OP_WRITE;
osd_req_op_extent_init(obj_req->osd_req, which, opcode,
obj_req->offset, obj_req->length, 0, 0);
obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0);
rbd_osd_req_setup_data(obj_req, which++);
rbd_assert(which == obj_req->osd_req->r_num_ops);
@ -1849,7 +1846,7 @@ static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req,
if (opcode)
osd_req_op_extent_init(obj_req->osd_req, which++, opcode,
obj_req->offset, obj_req->length,
obj_req->ex.oe_off, obj_req->ex.oe_len,
0, 0);
rbd_assert(which == obj_req->osd_req->r_num_ops);
@ -1964,9 +1961,9 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request,
if (!obj_request)
goto out_unwind;
obj_request->object_no = object_no;
obj_request->offset = offset;
obj_request->length = length;
obj_request->ex.oe_objno = object_no;
obj_request->ex.oe_off = offset;
obj_request->ex.oe_len = length;
/*
* set obj_request->img_request before creating the
@ -2064,7 +2061,7 @@ static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req)
if (obj_req->result == -ENOENT &&
obj_req->img_offset < rbd_dev->parent_overlap &&
!obj_req->tried_parent) {
u64 obj_overlap = min(obj_req->length,
u64 obj_overlap = min(obj_req->ex.oe_len,
rbd_dev->parent_overlap - obj_req->img_offset);
obj_req->tried_parent = true;
@ -2084,12 +2081,12 @@ static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req)
* count to indicate the whole request was satisfied.
*/
if (obj_req->result == -ENOENT ||
(!obj_req->result && obj_req->xferred < obj_req->length)) {
(!obj_req->result && obj_req->xferred < obj_req->ex.oe_len)) {
rbd_assert(!obj_req->xferred || !obj_req->result);
rbd_obj_zero_range(obj_req, obj_req->xferred,
obj_req->length - obj_req->xferred);
obj_req->ex.oe_len - obj_req->xferred);
obj_req->result = 0;
obj_req->xferred = obj_req->length;
obj_req->xferred = obj_req->ex.oe_len;
}
return true;
@ -2214,7 +2211,7 @@ static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req)
* Determine the byte range covered by the object in the
* child image to which the original request was to be sent.
*/
img_offset = obj_req->img_offset - obj_req->offset;
img_offset = obj_req->img_offset - obj_req->ex.oe_off;
obj_overlap = rbd_dev->layout.object_size;
/*
@ -2263,7 +2260,7 @@ again:
* There is no such thing as a successful short
* write -- indicate the whole request was satisfied.
*/
obj_req->xferred = obj_req->length;
obj_req->xferred = obj_req->ex.oe_len;
return true;
case RBD_OBJ_WRITE_COPYUP:
obj_req->write_state = RBD_OBJ_WRITE_GUARD;
@ -2300,7 +2297,7 @@ static bool __rbd_obj_handle_request(struct rbd_obj_request *obj_req)
*/
if (obj_req->result == -ENOENT) {
obj_req->result = 0;
obj_req->xferred = obj_req->length;
obj_req->xferred = obj_req->ex.oe_len;
}
return true;
}
@ -2315,7 +2312,7 @@ static void rbd_obj_end_request(struct rbd_obj_request *obj_req)
struct rbd_img_request *img_req = obj_req->img_request;
rbd_assert((!obj_req->result &&
obj_req->xferred == obj_req->length) ||
obj_req->xferred == obj_req->ex.oe_len) ||
(obj_req->result < 0 && !obj_req->xferred));
if (!obj_req->result) {
img_req->xferred += obj_req->xferred;
@ -2324,8 +2321,8 @@ static void rbd_obj_end_request(struct rbd_obj_request *obj_req)
rbd_warn(img_req->rbd_dev,
"%s at objno %llu %llu~%llu result %d xferred %llu",
obj_op_name(img_req->op_type), obj_req->object_no,
obj_req->offset, obj_req->length, obj_req->result,
obj_op_name(img_req->op_type), obj_req->ex.oe_objno,
obj_req->ex.oe_off, obj_req->ex.oe_len, obj_req->result,
obj_req->xferred);
if (!img_req->result) {
img_req->result = obj_req->result;