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authorIlya Dryomov <idryomov@gmail.com>2017-01-25 18:16:21 +0100
committerIlya Dryomov <idryomov@gmail.com>2017-02-20 12:16:13 +0100
commitecd4a68a26a2159b9f7233c6e892c94c90074cb0 (patch)
treed6626f98677ec32deead22e327e968917b838bcc /drivers/block
parent2544a02090aa76ffb8069e6bf23d886e34d9c8da (diff)
rbd: switch rbd_obj_method_sync() to ceph_osdc_call()
As explained in the previous commit, rbd_obj_request machinery (and rbd_osd_req_create() in particular) shouldn't be used for working with metadata objects. Switch to the recently added ceph_osdc_call(). It assumes single pages for outbound and inbound buffers, but that's OK - none of the callers need more than that. These pages need to be allocated (messenger is in dire need of proper iterator interface!), but we are swapping for pages[] and pagelist allocations in the existing code. Kill class_name argument - all rbd methods are under "rbd". Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jason Dillaman <dillaman@redhat.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/rbd.c162
1 files changed, 67 insertions, 95 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2c596f7498bd..644786e208ac 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3971,17 +3971,17 @@ out:
* returned in the outbound buffer, or a negative error code.
*/
static int rbd_obj_method_sync(struct rbd_device *rbd_dev,
- const char *object_name,
- const char *class_name,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
const char *method_name,
const void *outbound,
size_t outbound_size,
void *inbound,
size_t inbound_size)
{
- struct rbd_obj_request *obj_request;
- struct page **pages;
- u32 page_count;
+ struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
+ struct page *req_page = NULL;
+ struct page *reply_page;
int ret;
/*
@@ -3991,61 +3991,35 @@ static int rbd_obj_method_sync(struct rbd_device *rbd_dev,
* method. Currently if this is present it will be a
* snapshot id.
*/
- page_count = (u32)calc_pages_for(0, inbound_size);
- pages = ceph_alloc_page_vector(page_count, GFP_KERNEL);
- if (IS_ERR(pages))
- return PTR_ERR(pages);
+ if (outbound) {
+ if (outbound_size > PAGE_SIZE)
+ return -E2BIG;
- ret = -ENOMEM;
- obj_request = rbd_obj_request_create(object_name, 0, inbound_size,
- OBJ_REQUEST_PAGES);
- if (!obj_request)
- goto out;
-
- obj_request->pages = pages;
- obj_request->page_count = page_count;
-
- obj_request->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_READ, 1,
- obj_request);
- if (!obj_request->osd_req)
- goto out;
-
- osd_req_op_cls_init(obj_request->osd_req, 0, CEPH_OSD_OP_CALL,
- class_name, method_name);
- if (outbound_size) {
- struct ceph_pagelist *pagelist;
-
- pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
- if (!pagelist)
- goto out;
+ req_page = alloc_page(GFP_KERNEL);
+ if (!req_page)
+ return -ENOMEM;
- ceph_pagelist_init(pagelist);
- ceph_pagelist_append(pagelist, outbound, outbound_size);
- osd_req_op_cls_request_data_pagelist(obj_request->osd_req, 0,
- pagelist);
+ memcpy(page_address(req_page), outbound, outbound_size);
}
- osd_req_op_cls_response_data_pages(obj_request->osd_req, 0,
- obj_request->pages, inbound_size,
- 0, false, false);
- rbd_obj_request_submit(obj_request);
- ret = rbd_obj_request_wait(obj_request);
- if (ret)
- goto out;
-
- ret = obj_request->result;
- if (ret < 0)
- goto out;
+ reply_page = alloc_page(GFP_KERNEL);
+ if (!reply_page) {
+ if (req_page)
+ __free_page(req_page);
+ return -ENOMEM;
+ }
- rbd_assert(obj_request->xferred < (u64)INT_MAX);
- ret = (int)obj_request->xferred;
- ceph_copy_from_page_vector(pages, inbound, 0, obj_request->xferred);
-out:
- if (obj_request)
- rbd_obj_request_put(obj_request);
- else
- ceph_release_page_vector(pages, page_count);
+ ret = ceph_osdc_call(osdc, oid, oloc, RBD_DRV_NAME, method_name,
+ CEPH_OSD_FLAG_READ, req_page, outbound_size,
+ reply_page, &inbound_size);
+ if (!ret) {
+ memcpy(inbound, page_address(reply_page), inbound_size);
+ ret = inbound_size;
+ }
+ if (req_page)
+ __free_page(req_page);
+ __free_page(reply_page);
return ret;
}
@@ -4939,10 +4913,10 @@ static int _rbd_dev_v2_snap_size(struct rbd_device *rbd_dev, u64 snap_id,
__le64 size;
} __attribute__ ((packed)) size_buf = { 0 };
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_size",
- &snapid, sizeof (snapid),
- &size_buf, sizeof (size_buf));
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_size",
+ &snapid, sizeof(snapid),
+ &size_buf, sizeof(size_buf));
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
return ret;
@@ -4979,9 +4953,9 @@ static int rbd_dev_v2_object_prefix(struct rbd_device *rbd_dev)
if (!reply_buf)
return -ENOMEM;
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_object_prefix", NULL, 0,
- reply_buf, RBD_OBJ_PREFIX_LEN_MAX);
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_object_prefix",
+ NULL, 0, reply_buf, RBD_OBJ_PREFIX_LEN_MAX);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
goto out;
@@ -5014,10 +4988,10 @@ static int _rbd_dev_v2_snap_features(struct rbd_device *rbd_dev, u64 snap_id,
u64 unsup;
int ret;
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_features",
- &snapid, sizeof (snapid),
- &features_buf, sizeof (features_buf));
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_features",
+ &snapid, sizeof(snapid),
+ &features_buf, sizeof(features_buf));
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
return ret;
@@ -5076,10 +5050,9 @@ static int rbd_dev_v2_parent_info(struct rbd_device *rbd_dev)
}
snapid = cpu_to_le64(rbd_dev->spec->snap_id);
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_parent",
- &snapid, sizeof (snapid),
- reply_buf, size);
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_parent",
+ &snapid, sizeof(snapid), reply_buf, size);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
goto out_err;
@@ -5179,9 +5152,9 @@ static int rbd_dev_v2_striping_info(struct rbd_device *rbd_dev)
u64 stripe_count;
int ret;
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_stripe_unit_count", NULL, 0,
- (char *)&striping_info_buf, size);
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_stripe_unit_count",
+ NULL, 0, &striping_info_buf, size);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
return ret;
@@ -5218,6 +5191,7 @@ static int rbd_dev_v2_striping_info(struct rbd_device *rbd_dev)
static char *rbd_dev_image_name(struct rbd_device *rbd_dev)
{
+ CEPH_DEFINE_OID_ONSTACK(oid);
size_t image_id_size;
char *image_id;
void *p;
@@ -5245,10 +5219,10 @@ static char *rbd_dev_image_name(struct rbd_device *rbd_dev)
if (!reply_buf)
goto out;
- ret = rbd_obj_method_sync(rbd_dev, RBD_DIRECTORY,
- "rbd", "dir_get_name",
- image_id, image_id_size,
- reply_buf, size);
+ ceph_oid_printf(&oid, "%s", RBD_DIRECTORY);
+ ret = rbd_obj_method_sync(rbd_dev, &oid, &rbd_dev->header_oloc,
+ "dir_get_name", image_id, image_id_size,
+ reply_buf, size);
if (ret < 0)
goto out;
p = reply_buf;
@@ -5427,9 +5401,9 @@ static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev)
if (!reply_buf)
return -ENOMEM;
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_snapcontext", NULL, 0,
- reply_buf, size);
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_snapcontext",
+ NULL, 0, reply_buf, size);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0)
goto out;
@@ -5492,10 +5466,9 @@ static const char *rbd_dev_v2_snap_name(struct rbd_device *rbd_dev,
return ERR_PTR(-ENOMEM);
snapid = cpu_to_le64(snap_id);
- ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_oid.name,
- "rbd", "get_snapshot_name",
- &snapid, sizeof (snapid),
- reply_buf, size);
+ ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
+ &rbd_dev->header_oloc, "get_snapshot_name",
+ &snapid, sizeof(snapid), reply_buf, size);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret < 0) {
snap_name = ERR_PTR(ret);
@@ -5802,7 +5775,7 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev)
{
int ret;
size_t size;
- char *object_name;
+ CEPH_DEFINE_OID_ONSTACK(oid);
void *response;
char *image_id;
@@ -5822,12 +5795,12 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev)
* First, see if the format 2 image id file exists, and if
* so, get the image's persistent id from it.
*/
- size = sizeof (RBD_ID_PREFIX) + strlen(rbd_dev->spec->image_name);
- object_name = kmalloc(size, GFP_NOIO);
- if (!object_name)
- return -ENOMEM;
- sprintf(object_name, "%s%s", RBD_ID_PREFIX, rbd_dev->spec->image_name);
- dout("rbd id object name is %s\n", object_name);
+ ret = ceph_oid_aprintf(&oid, GFP_KERNEL, "%s%s", RBD_ID_PREFIX,
+ rbd_dev->spec->image_name);
+ if (ret)
+ return ret;
+
+ dout("rbd id object name is %s\n", oid.name);
/* Response will be an encoded string, which includes a length */
@@ -5840,9 +5813,9 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev)
/* If it doesn't exist we'll assume it's a format 1 image */
- ret = rbd_obj_method_sync(rbd_dev, object_name,
- "rbd", "get_id", NULL, 0,
- response, RBD_IMAGE_ID_LEN_MAX);
+ ret = rbd_obj_method_sync(rbd_dev, &oid, &rbd_dev->header_oloc,
+ "get_id", NULL, 0,
+ response, RBD_IMAGE_ID_LEN_MAX);
dout("%s: rbd_obj_method_sync returned %d\n", __func__, ret);
if (ret == -ENOENT) {
image_id = kstrdup("", GFP_KERNEL);
@@ -5865,8 +5838,7 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev)
}
out:
kfree(response);
- kfree(object_name);
-
+ ceph_oid_destroy(&oid);
return ret;
}