libceph: support for CEPH_OSD_OP_LIST_WATCHERS
Add support for this Ceph OSD op, needed to support the RBD exclusive lock feature. Signed-off-by: Douglas Fuller <dfuller@redhat.com> [idryomov@gmail.com: refactor, misc fixes throughout] Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
parent
f01d5cb24e
commit
a4ed38d7a1
|
@ -120,6 +120,9 @@ struct ceph_osd_req_op {
|
|||
struct ceph_osd_data request_data;
|
||||
struct ceph_osd_data response_data;
|
||||
} notify;
|
||||
struct {
|
||||
struct ceph_osd_data response_data;
|
||||
} list_watchers;
|
||||
struct {
|
||||
u64 expected_object_size;
|
||||
u64 expected_write_size;
|
||||
|
@ -249,6 +252,12 @@ struct ceph_osd_linger_request {
|
|||
size_t *preply_len;
|
||||
};
|
||||
|
||||
struct ceph_watch_item {
|
||||
struct ceph_entity_name name;
|
||||
u64 cookie;
|
||||
struct ceph_entity_addr addr;
|
||||
};
|
||||
|
||||
struct ceph_osd_client {
|
||||
struct ceph_client *client;
|
||||
|
||||
|
@ -346,7 +355,6 @@ extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
|
|||
struct page **pages, u64 length,
|
||||
u32 alignment, bool pages_from_pool,
|
||||
bool own_pages);
|
||||
|
||||
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
|
||||
unsigned int which, u16 opcode,
|
||||
const char *class, const char *method);
|
||||
|
@ -434,5 +442,10 @@ int ceph_osdc_notify(struct ceph_osd_client *osdc,
|
|||
size_t *preply_len);
|
||||
int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
|
||||
struct ceph_osd_linger_request *lreq);
|
||||
int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
|
||||
struct ceph_object_id *oid,
|
||||
struct ceph_object_locator *oloc,
|
||||
struct ceph_watch_item **watchers,
|
||||
u32 *num_watchers);
|
||||
#endif
|
||||
|
||||
|
|
|
@ -338,6 +338,9 @@ static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
|
|||
ceph_osd_data_release(&op->notify.request_data);
|
||||
ceph_osd_data_release(&op->notify.response_data);
|
||||
break;
|
||||
case CEPH_OSD_OP_LIST_WATCHERS:
|
||||
ceph_osd_data_release(&op->list_watchers.response_data);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
@ -863,6 +866,8 @@ static u32 osd_req_encode_op(struct ceph_osd_op *dst,
|
|||
case CEPH_OSD_OP_NOTIFY:
|
||||
dst->notify.cookie = cpu_to_le64(src->notify.cookie);
|
||||
break;
|
||||
case CEPH_OSD_OP_LIST_WATCHERS:
|
||||
break;
|
||||
case CEPH_OSD_OP_SETALLOCHINT:
|
||||
dst->alloc_hint.expected_object_size =
|
||||
cpu_to_le64(src->alloc_hint.expected_object_size);
|
||||
|
@ -1445,6 +1450,10 @@ static void setup_request_data(struct ceph_osd_request *req,
|
|||
ceph_osdc_msg_data_add(req->r_reply,
|
||||
&op->extent.osd_data);
|
||||
break;
|
||||
case CEPH_OSD_OP_LIST_WATCHERS:
|
||||
ceph_osdc_msg_data_add(req->r_reply,
|
||||
&op->list_watchers.response_data);
|
||||
break;
|
||||
|
||||
/* both */
|
||||
case CEPH_OSD_OP_CALL:
|
||||
|
@ -3891,6 +3900,114 @@ int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
|
||||
{
|
||||
u8 struct_v;
|
||||
u32 struct_len;
|
||||
int ret;
|
||||
|
||||
ret = ceph_start_decoding(p, end, 2, "watch_item_t",
|
||||
&struct_v, &struct_len);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ceph_decode_copy(p, &item->name, sizeof(item->name));
|
||||
item->cookie = ceph_decode_64(p);
|
||||
*p += 4; /* skip timeout_seconds */
|
||||
if (struct_v >= 2) {
|
||||
ceph_decode_copy(p, &item->addr, sizeof(item->addr));
|
||||
ceph_decode_addr(&item->addr);
|
||||
}
|
||||
|
||||
dout("%s %s%llu cookie %llu addr %s\n", __func__,
|
||||
ENTITY_NAME(item->name), item->cookie,
|
||||
ceph_pr_addr(&item->addr.in_addr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decode_watchers(void **p, void *end,
|
||||
struct ceph_watch_item **watchers,
|
||||
u32 *num_watchers)
|
||||
{
|
||||
u8 struct_v;
|
||||
u32 struct_len;
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
|
||||
&struct_v, &struct_len);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
*num_watchers = ceph_decode_32(p);
|
||||
*watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
|
||||
if (!*watchers)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < *num_watchers; i++) {
|
||||
ret = decode_watcher(p, end, *watchers + i);
|
||||
if (ret) {
|
||||
kfree(*watchers);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* On success, the caller is responsible for:
|
||||
*
|
||||
* kfree(watchers);
|
||||
*/
|
||||
int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
|
||||
struct ceph_object_id *oid,
|
||||
struct ceph_object_locator *oloc,
|
||||
struct ceph_watch_item **watchers,
|
||||
u32 *num_watchers)
|
||||
{
|
||||
struct ceph_osd_request *req;
|
||||
struct page **pages;
|
||||
int ret;
|
||||
|
||||
req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
|
||||
if (!req)
|
||||
return -ENOMEM;
|
||||
|
||||
ceph_oid_copy(&req->r_base_oid, oid);
|
||||
ceph_oloc_copy(&req->r_base_oloc, oloc);
|
||||
req->r_flags = CEPH_OSD_FLAG_READ;
|
||||
|
||||
ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
|
||||
if (ret)
|
||||
goto out_put_req;
|
||||
|
||||
pages = ceph_alloc_page_vector(1, GFP_NOIO);
|
||||
if (IS_ERR(pages)) {
|
||||
ret = PTR_ERR(pages);
|
||||
goto out_put_req;
|
||||
}
|
||||
|
||||
osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
|
||||
ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
|
||||
response_data),
|
||||
pages, PAGE_SIZE, 0, false, true);
|
||||
|
||||
ceph_osdc_start_request(osdc, req, false);
|
||||
ret = ceph_osdc_wait_request(osdc, req);
|
||||
if (ret >= 0) {
|
||||
void *p = page_address(pages[0]);
|
||||
void *const end = p + req->r_ops[0].outdata_len;
|
||||
|
||||
ret = decode_watchers(&p, end, watchers, num_watchers);
|
||||
}
|
||||
|
||||
out_put_req:
|
||||
ceph_osdc_put_request(req);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ceph_osdc_list_watchers);
|
||||
|
||||
/*
|
||||
* Call all pending notify callbacks - for use after a watch is
|
||||
* unregistered, to make sure no more callbacks for it will be invoked
|
||||
|
|
Loading…
Reference in a new issue