Since the dawn of time it had been assumed that a single object request
spawns a single OSD request. This is already impacting copyup: instead
of sending empty and current snapc copyups together, we wait for empty
snapc OSD request to complete in order to reassign obj_req->osd_req
with current snapc OSD request. Looking further, updating potentially
hundreds of snapshot object maps serially is a non-starter.
Replace obj_req->osd_req pointer with obj_req->osd_reqs list. Use
osd_req->r_unsafe_item for linkage -- it's used by the filesystem for
a similar purpose.
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
---
drivers/block/rbd.c | 191 +++++++++++++++++++++++---------------------
1 file changed, 100 insertions(+), 91 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 51dd1b99c242..5c34fe215c63 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -289,7 +289,7 @@ struct rbd_obj_request {
struct bio_vec *copyup_bvecs;
u32 copyup_bvec_count;
- struct ceph_osd_request *osd_req;
+ struct list_head osd_reqs; /* w/ r_unsafe_item */
struct mutex state_mutex;
struct kref kref;
@@ -1410,7 +1410,9 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request,
static void rbd_obj_request_submit(struct rbd_obj_request *obj_request)
{
- struct ceph_osd_request *osd_req = obj_request->osd_req;
+ struct ceph_osd_request *osd_req =
+ list_last_entry(&obj_request->osd_reqs, struct ceph_osd_request,
+ r_unsafe_item);
dout("%s %p object_no %016llx %llu~%llu osd_req %p\n", __func__,
obj_request, obj_request->ex.oe_objno, obj_request->ex.oe_off,
@@ -1497,7 +1499,6 @@ static void rbd_osd_req_callback(struct ceph_osd_request *osd_req)
dout("%s osd_req %p result %d for obj_req %p\n", __func__, osd_req,
osd_req->r_result, obj_req);
- rbd_assert(osd_req == obj_req->osd_req);
/*
* Writes aren't allowed to return a data payload. In some
@@ -1512,17 +1513,17 @@ static void rbd_osd_req_callback(struct ceph_osd_request *osd_req)
rbd_obj_handle_request(obj_req, result);
}
-static void rbd_osd_req_format_read(struct rbd_obj_request *obj_request)
+static void rbd_osd_format_read(struct ceph_osd_request *osd_req)
{
- struct ceph_osd_request *osd_req = obj_request->osd_req;
+ struct rbd_obj_request *obj_request = osd_req->r_priv;
osd_req->r_flags = CEPH_OSD_FLAG_READ;
osd_req->r_snapid = obj_request->img_request->snap_id;
}
-static void rbd_osd_req_format_write(struct rbd_obj_request *obj_request)
+static void rbd_osd_format_write(struct ceph_osd_request *osd_req)
{
- struct ceph_osd_request *osd_req = obj_request->osd_req;
+ struct rbd_obj_request *obj_request = osd_req->r_priv;
osd_req->r_flags = CEPH_OSD_FLAG_WRITE;
ktime_get_real_ts64(&osd_req->r_mtime);
@@ -1530,19 +1531,21 @@ static void rbd_osd_req_format_write(struct rbd_obj_request *obj_request)
}
static struct ceph_osd_request *
-__rbd_osd_req_create(struct rbd_obj_request *obj_req,
- struct ceph_snap_context *snapc, unsigned int num_ops)
+__rbd_obj_add_osd_request(struct rbd_obj_request *obj_req,
+ struct ceph_snap_context *snapc, int num_ops)
{
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
struct ceph_osd_request *req;
const char *name_format = rbd_dev->image_format == 1 ?
RBD_V1_DATA_FORMAT : RBD_V2_DATA_FORMAT;
+ int ret;
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, false, GFP_NOIO);
if (!req)
- return NULL;
+ return ERR_PTR(-ENOMEM);
+ list_add_tail(&req->r_unsafe_item, &obj_req->osd_reqs);
req->r_callback = rbd_osd_req_callback;
req->r_priv = obj_req;
@@ -1553,27 +1556,20 @@ __rbd_osd_req_create(struct rbd_obj_request *obj_req,
ceph_oloc_copy(&req->r_base_oloc, &rbd_dev->header_oloc);
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->ex.oe_objno))
- goto err_req;
+ ret = ceph_oid_aprintf(&req->r_base_oid, GFP_NOIO, name_format,
+ rbd_dev->header.object_prefix,
+ obj_req->ex.oe_objno);
+ if (ret)
+ return ERR_PTR(ret);
return req;
-
-err_req:
- ceph_osdc_put_request(req);
- return NULL;
}
static struct ceph_osd_request *
-rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops)
+rbd_obj_add_osd_request(struct rbd_obj_request *obj_req, int num_ops)
{
- return __rbd_osd_req_create(obj_req, obj_req->img_request->snapc,
- num_ops);
-}
-
-static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req)
-{
- ceph_osdc_put_request(osd_req);
+ return __rbd_obj_add_osd_request(obj_req, obj_req->img_request->snapc,
+ num_ops);
}
static struct rbd_obj_request *rbd_obj_request_create(void)
@@ -1585,6 +1581,7 @@ static struct rbd_obj_request *rbd_obj_request_create(void)
return NULL;
ceph_object_extent_init(&obj_request->ex);
+ INIT_LIST_HEAD(&obj_request->osd_reqs);
mutex_init(&obj_request->state_mutex);
kref_init(&obj_request->kref);
@@ -1595,14 +1592,19 @@ static struct rbd_obj_request *rbd_obj_request_create(void)
static void rbd_obj_request_destroy(struct kref *kref)
{
struct rbd_obj_request *obj_request;
+ struct ceph_osd_request *osd_req;
u32 i;
obj_request = container_of(kref, struct rbd_obj_request, kref);
dout("%s: obj %p\n", __func__, obj_request);
- if (obj_request->osd_req)
- rbd_osd_req_destroy(obj_request->osd_req);
+ while (!list_empty(&obj_request->osd_reqs)) {
+ osd_req = list_first_entry(&obj_request->osd_reqs,
+ struct ceph_osd_request, r_unsafe_item);
+ list_del_init(&osd_req->r_unsafe_item);
+ ceph_osdc_put_request(osd_req);
+ }
switch (obj_request->img_request->data_type) {
case OBJ_REQUEST_NODATA:
@@ -1796,11 +1798,13 @@ static int rbd_obj_calc_img_extents(struct rbd_obj_request *obj_req,
return 0;
}
-static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which)
+static void rbd_osd_setup_data(struct ceph_osd_request *osd_req, int which)
{
+ struct rbd_obj_request *obj_req = osd_req->r_priv;
+
switch (obj_req->img_request->data_type) {
case OBJ_REQUEST_BIO:
- osd_req_op_extent_osd_data_bio(obj_req->osd_req, which,
+ osd_req_op_extent_osd_data_bio(osd_req, which,
&obj_req->bio_pos,
obj_req->ex.oe_len);
break;
@@ -1809,7 +1813,7 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which)
rbd_assert(obj_req->bvec_pos.iter.bi_size ==
obj_req->ex.oe_len);
rbd_assert(obj_req->bvec_idx == obj_req->bvec_count);
- osd_req_op_extent_osd_data_bvec_pos(obj_req->osd_req, which,
+ osd_req_op_extent_osd_data_bvec_pos(osd_req, which,
&obj_req->bvec_pos);
break;
default:
@@ -1819,21 +1823,22 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which)
static int rbd_obj_setup_read(struct rbd_obj_request *obj_req)
{
- obj_req->osd_req = __rbd_osd_req_create(obj_req, NULL, 1);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ struct ceph_osd_request *osd_req;
- osd_req_op_extent_init(obj_req->osd_req, 0, CEPH_OSD_OP_READ,
+ osd_req = __rbd_obj_add_osd_request(obj_req, NULL, 1);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
+
+ osd_req_op_extent_init(osd_req, 0, CEPH_OSD_OP_READ,
obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0);
- rbd_osd_req_setup_data(obj_req, 0);
+ rbd_osd_setup_data(osd_req, 0);
- rbd_osd_req_format_read(obj_req);
+ rbd_osd_format_read(osd_req);
obj_req->read_state = RBD_OBJ_READ_START;
return 0;
}
-static int __rbd_obj_setup_stat(struct rbd_obj_request *obj_req,
- unsigned int which)
+static int rbd_osd_setup_stat(struct ceph_osd_request *osd_req, int which)
{
struct page **pages;
@@ -1849,8 +1854,8 @@ static int __rbd_obj_setup_stat(struct rbd_obj_request *obj_req,
if (IS_ERR(pages))
return PTR_ERR(pages);
- osd_req_op_init(obj_req->osd_req, which, CEPH_OSD_OP_STAT, 0);
- osd_req_op_raw_data_in_pages(obj_req->osd_req, which, pages,
+ osd_req_op_init(osd_req, which, CEPH_OSD_OP_STAT, 0);
+ osd_req_op_raw_data_in_pages(osd_req, which, pages,
8 + sizeof(struct ceph_timespec),
0, false, true);
return 0;
@@ -1861,13 +1866,14 @@ static int count_write_ops(struct rbd_obj_request *obj_req)
return 2; /* setallochint + write/writefull */
}
-static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req,
- unsigned int which)
+static void __rbd_osd_setup_write_ops(struct ceph_osd_request *osd_req,
+ int which)
{
+ struct rbd_obj_request *obj_req = osd_req->r_priv;
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
u16 opcode;
- osd_req_op_alloc_hint_init(obj_req->osd_req, which++,
+ osd_req_op_alloc_hint_init(osd_req, which++,
rbd_dev->layout.object_size,
rbd_dev->layout.object_size);
@@ -1876,16 +1882,16 @@ static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req,
else
opcode = CEPH_OSD_OP_WRITE;
- osd_req_op_extent_init(obj_req->osd_req, which, opcode,
+ osd_req_op_extent_init(osd_req, which, opcode,
obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0);
- rbd_osd_req_setup_data(obj_req, which++);
+ rbd_osd_setup_data(osd_req, which);
- rbd_assert(which == obj_req->osd_req->r_num_ops);
- rbd_osd_req_format_write(obj_req);
+ rbd_osd_format_write(osd_req);
}
static int rbd_obj_setup_write(struct rbd_obj_request *obj_req)
{
+ struct ceph_osd_request *osd_req;
unsigned int num_osd_ops, which = 0;
int ret;
@@ -1901,18 +1907,18 @@ static int rbd_obj_setup_write(struct rbd_obj_request *obj_req)
if (obj_req->flags & RBD_OBJ_FLAG_COPYUP_ENABLED)
num_osd_ops++; /* stat */
- obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ osd_req = rbd_obj_add_osd_request(obj_req, num_osd_ops);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
if (obj_req->flags & RBD_OBJ_FLAG_COPYUP_ENABLED) {
- ret = __rbd_obj_setup_stat(obj_req, which++);
+ ret = rbd_osd_setup_stat(osd_req, which++);
if (ret)
return ret;
}
obj_req->write_state = RBD_OBJ_WRITE_START;
- __rbd_obj_setup_write(obj_req, which);
+ __rbd_osd_setup_write_ops(osd_req, which);
return 0;
}
@@ -1925,6 +1931,7 @@ static u16 truncate_or_zero_opcode(struct rbd_obj_request *obj_req)
static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req)
{
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
+ struct ceph_osd_request *osd_req;
u64 off = obj_req->ex.oe_off;
u64 next_off = obj_req->ex.oe_off + obj_req->ex.oe_len;
int ret;
@@ -1953,24 +1960,24 @@ static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req)
if (rbd_obj_is_entire(obj_req) && !obj_req->num_img_extents)
obj_req->flags |= RBD_OBJ_FLAG_DELETION;
- obj_req->osd_req = rbd_osd_req_create(obj_req, 1);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ osd_req = rbd_obj_add_osd_request(obj_req, 1);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
if (rbd_obj_is_entire(obj_req) && !obj_req->num_img_extents) {
rbd_assert(obj_req->flags & RBD_OBJ_FLAG_DELETION);
- osd_req_op_init(obj_req->osd_req, 0, CEPH_OSD_OP_DELETE, 0);
+ osd_req_op_init(osd_req, 0, CEPH_OSD_OP_DELETE, 0);
} else {
dout("%s %p %llu~%llu -> %llu~%llu\n", __func__,
obj_req, obj_req->ex.oe_off, obj_req->ex.oe_len,
off, next_off - off);
- osd_req_op_extent_init(obj_req->osd_req, 0,
+ osd_req_op_extent_init(osd_req, 0,
truncate_or_zero_opcode(obj_req),
off, next_off - off, 0, 0);
}
obj_req->write_state = RBD_OBJ_WRITE_START;
- rbd_osd_req_format_write(obj_req);
+ rbd_osd_format_write(osd_req);
return 0;
}
@@ -1987,20 +1994,21 @@ static int count_zeroout_ops(struct rbd_obj_request *obj_req)
return num_osd_ops;
}
-static void __rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req,
- unsigned int which)
+static void __rbd_osd_setup_zeroout_ops(struct ceph_osd_request *osd_req,
+ int which)
{
+ struct rbd_obj_request *obj_req = osd_req->r_priv;
u16 opcode;
if (rbd_obj_is_entire(obj_req)) {
if (obj_req->num_img_extents) {
if (!(obj_req->flags & RBD_OBJ_FLAG_COPYUP_ENABLED))
- osd_req_op_init(obj_req->osd_req, which++,
+ osd_req_op_init(osd_req, which++,
CEPH_OSD_OP_CREATE, 0);
opcode = CEPH_OSD_OP_TRUNCATE;
} else {
rbd_assert(obj_req->flags & RBD_OBJ_FLAG_DELETION);
- osd_req_op_init(obj_req->osd_req, which++,
+ osd_req_op_init(osd_req, which++,
CEPH_OSD_OP_DELETE, 0);
opcode = 0;
}
@@ -2009,16 +2017,16 @@ static void __rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req,
}
if (opcode)
- osd_req_op_extent_init(obj_req->osd_req, which++, opcode,
+ osd_req_op_extent_init(osd_req, which, opcode,
obj_req->ex.oe_off, obj_req->ex.oe_len,
0, 0);
- rbd_assert(which == obj_req->osd_req->r_num_ops);
- rbd_osd_req_format_write(obj_req);
+ rbd_osd_format_write(osd_req);
}
static int rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req)
{
+ struct ceph_osd_request *osd_req;
unsigned int num_osd_ops, which = 0;
int ret;
@@ -2038,18 +2046,18 @@ static int rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req)
if (obj_req->flags & RBD_OBJ_FLAG_COPYUP_ENABLED)
num_osd_ops++; /* stat */
- obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ osd_req = rbd_obj_add_osd_request(obj_req, num_osd_ops);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
if (obj_req->flags & RBD_OBJ_FLAG_COPYUP_ENABLED) {
- ret = __rbd_obj_setup_stat(obj_req, which++);
+ ret = rbd_osd_setup_stat(osd_req, which++);
if (ret)
return ret;
}
obj_req->write_state = RBD_OBJ_WRITE_START;
- __rbd_obj_setup_zeroout(obj_req, which);
+ __rbd_osd_setup_zeroout_ops(osd_req, which);
return 0;
}
@@ -2061,6 +2069,7 @@ static int rbd_obj_setup_zeroout(struct rbd_obj_request *obj_req)
static int __rbd_img_fill_request(struct rbd_img_request *img_req)
{
struct rbd_obj_request *obj_req, *next_obj_req;
+ struct ceph_osd_request *osd_req;
int ret;
for_each_obj_request_safe(img_req, obj_req, next_obj_req) {
@@ -2087,7 +2096,10 @@ static int __rbd_img_fill_request(struct rbd_img_request *img_req)
continue;
}
- ret = ceph_osdc_alloc_messages(obj_req->osd_req, GFP_NOIO);
+ osd_req = list_last_entry(&obj_req->osd_reqs,
+ struct ceph_osd_request,
+ r_unsafe_item);
+ ret = ceph_osdc_alloc_messages(osd_req, GFP_NOIO);
if (ret)
return ret;
}
@@ -2538,28 +2550,27 @@ static bool is_zero_bvecs(struct bio_vec *bvecs, u32 bytes)
static int rbd_obj_issue_copyup_empty_snapc(struct rbd_obj_request *obj_req,
u32 bytes)
{
+ struct ceph_osd_request *osd_req;
int ret;
dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes);
- rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT);
rbd_assert(bytes > 0 && bytes != MODS_ONLY);
- rbd_osd_req_destroy(obj_req->osd_req);
- obj_req->osd_req = __rbd_osd_req_create(obj_req, &rbd_empty_snapc, 1);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ osd_req = __rbd_obj_add_osd_request(obj_req, &rbd_empty_snapc, 1);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
- ret = osd_req_op_cls_init(obj_req->osd_req, 0, "rbd", "copyup");
+ ret = osd_req_op_cls_init(osd_req, 0, "rbd", "copyup");
if (ret)
return ret;
- osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0,
+ osd_req_op_cls_request_data_bvecs(osd_req, 0,
obj_req->copyup_bvecs,
obj_req->copyup_bvec_count,
bytes);
- rbd_osd_req_format_write(obj_req);
+ rbd_osd_format_write(osd_req);
- ret = ceph_osdc_alloc_messages(obj_req->osd_req, GFP_NOIO);
+ ret = ceph_osdc_alloc_messages(osd_req, GFP_NOIO);
if (ret)
return ret;
@@ -2570,14 +2581,12 @@ static int rbd_obj_issue_copyup_empty_snapc(struct rbd_obj_request *obj_req,
static int rbd_obj_issue_copyup_ops(struct rbd_obj_request *obj_req, u32 bytes)
{
struct rbd_img_request *img_req = obj_req->img_request;
+ struct ceph_osd_request *osd_req;
unsigned int num_osd_ops = (bytes != MODS_ONLY);
unsigned int which = 0;
int ret;
dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes);
- rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT ||
- obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_CALL);
- rbd_osd_req_destroy(obj_req->osd_req);
switch (img_req->op_type) {
case OBJ_OP_WRITE:
@@ -2590,17 +2599,17 @@ static int rbd_obj_issue_copyup_ops(struct rbd_obj_request *obj_req, u32 bytes)
BUG();
}
- obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops);
- if (!obj_req->osd_req)
- return -ENOMEM;
+ osd_req = rbd_obj_add_osd_request(obj_req, num_osd_ops);
+ if (IS_ERR(osd_req))
+ return PTR_ERR(osd_req);
if (bytes != MODS_ONLY) {
- ret = osd_req_op_cls_init(obj_req->osd_req, which, "rbd",
+ ret = osd_req_op_cls_init(osd_req, which, "rbd",
"copyup");
if (ret)
return ret;
- osd_req_op_cls_request_data_bvecs(obj_req->osd_req, which++,
+ osd_req_op_cls_request_data_bvecs(osd_req, which++,
obj_req->copyup_bvecs,
obj_req->copyup_bvec_count,
bytes);
@@ -2608,16 +2617,16 @@ static int rbd_obj_issue_copyup_ops(struct rbd_obj_request *obj_req, u32 bytes)
switch (img_req->op_type) {
case OBJ_OP_WRITE:
- __rbd_obj_setup_write(obj_req, which);
+ __rbd_osd_setup_write_ops(osd_req, which);
break;
case OBJ_OP_ZEROOUT:
- __rbd_obj_setup_zeroout(obj_req, which);
+ __rbd_osd_setup_zeroout_ops(osd_req, which);
break;
default:
BUG();
}
- ret = ceph_osdc_alloc_messages(obj_req->osd_req, GFP_NOIO);
+ ret = ceph_osdc_alloc_messages(osd_req, GFP_NOIO);
if (ret)
return ret;
--
2.19.2
