This ends up being a rather large patch but what it's doing is
somewhat straightforward.
Basically, this is replacing two calls with one. The first of the
two calls is initializing a struct ceph_osd_data with data (either a
page array, a page list, or a bio list); the second is setting an
osd request op so it associates that data with one of the op's
parameters. In place of those two will be a single function that
initializes the op directly.
That means we sort of fan out a set of the needed functions:
- extent ops with pages data
- extent ops with pagelist data
- extent ops with bio list data
and
- class ops with page data for receiving a response
We also have define another one, but it's only used internally:
- class ops with pagelist data for request parameters
Note that we *still* haven't gotten rid of the osd request's
r_data_in and r_data_out fields. All the osd ops refer to them for
their data. For now, these data fields are pointers assigned to the
appropriate r_data_* field when these new functions are called.
Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
drivers/block/rbd.c | 20 ++---
fs/ceph/addr.c | 12 ++-
fs/ceph/file.c | 3 +-
include/linux/ceph/osd_client.h | 43 +++++++----
net/ceph/osd_client.c | 157
++++++++++++++++++++++++++++++---------
5 files changed, 162 insertions(+), 73 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 3e8e6d5..7db244e 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1592,7 +1592,6 @@ static int rbd_img_request_fill_bio(struct
rbd_img_request *img_request,
rbd_assert(resid > 0);
while (resid) {
struct ceph_osd_request *osd_req;
- struct ceph_osd_data *osd_data;
const char *object_name;
unsigned int clone_size;
u64 offset;
@@ -1625,13 +1624,10 @@ static int rbd_img_request_fill_bio(struct
rbd_img_request *img_request,
obj_request->osd_req = osd_req;
obj_request->callback = rbd_img_obj_callback;
- osd_data = write_request ? &osd_req->r_data_out
- : &osd_req->r_data_in;
osd_req_op_extent_init(osd_req, 0, opcode, offset, length,
0, 0);
- ceph_osd_data_bio_init(osd_data, obj_request->bio_list,
- obj_request->length);
- osd_req_op_extent_osd_data(osd_req, 0, osd_data);
+ osd_req_op_extent_osd_data_bio(osd_req, 0, write_request,
+ obj_request->bio_list, obj_request->length);
rbd_osd_req_format(obj_request, write_request);
rbd_img_obj_request_add(img_request, obj_request);
@@ -1821,7 +1817,6 @@ static int rbd_obj_method_sync(struct rbd_device
*rbd_dev,
{
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
struct rbd_obj_request *obj_request;
- struct ceph_osd_data *osd_data;
struct page **pages;
u32 page_count;
int ret;
@@ -1851,13 +1846,12 @@ static int rbd_obj_method_sync(struct rbd_device
*rbd_dev,
if (!obj_request->osd_req)
goto out;
- osd_data = &obj_request->osd_req->r_data_in;
osd_req_op_cls_init(obj_request->osd_req, 0, CEPH_OSD_OP_CALL,
class_name, method_name,
outbound, outbound_size);
- ceph_osd_data_pages_init(osd_data, obj_request->pages, 0, 0,
+ osd_req_op_cls_response_data_pages(obj_request->osd_req, 0,
+ obj_request->pages, 0, 0,
false, false);
- osd_req_op_cls_response_data(obj_request->osd_req, 0, osd_data);
rbd_osd_req_format(obj_request, false);
ret = rbd_obj_request_submit(osdc, obj_request);
@@ -2037,7 +2031,6 @@ static int rbd_obj_read_sync(struct rbd_device
*rbd_dev,
{
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
struct rbd_obj_request *obj_request;
- struct ceph_osd_data *osd_data;
struct page **pages = NULL;
u32 page_count;
size_t size;
@@ -2061,14 +2054,13 @@ static int rbd_obj_read_sync(struct rbd_device
*rbd_dev,
if (!obj_request->osd_req)
goto out;
- osd_data = &obj_request->osd_req->r_data_in;
osd_req_op_extent_init(obj_request->osd_req, 0, CEPH_OSD_OP_READ,
offset, length, 0, 0);
- ceph_osd_data_pages_init(osd_data, obj_request->pages,
+ osd_req_op_extent_osd_data_pages(obj_request->osd_req, 0, false,
+ obj_request->pages,
obj_request->length,
obj_request->offset & ~PAGE_MASK,
false, false);
- osd_req_op_extent_osd_data(obj_request->osd_req, 0, osd_data);
rbd_osd_req_format(obj_request, false);
ret = rbd_obj_request_submit(osdc, obj_request);
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index dd5d263..068d2c8 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -245,7 +245,7 @@ static void finish_read(struct ceph_osd_request
*req, struct ceph_msg *msg)
dout("finish_read %p req %p rc %d bytes %d\n", inode, req, rc, bytes);
/* unlock all pages, zeroing any data we didn't read */
- osd_data = &req->r_data_in;
+ osd_data = osd_req_op_extent_osd_data(req, 0, false);
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
num_pages = calc_pages_for((u64)osd_data->alignment,
(u64)osd_data->length);
@@ -343,8 +343,7 @@ static int start_read(struct inode *inode, struct
list_head *page_list, int max)
}
pages[i] = page;
}
- BUG_ON(req->r_ops[0].extent.osd_data != &req->r_data_in);
- ceph_osd_data_pages_init(req->r_ops[0].extent.osd_data, pages, len, 0,
+ osd_req_op_extent_osd_data_pages(req, 0, false, pages, len, 0,
false, false);
req->r_callback = finish_read;
req->r_inode = inode;
@@ -572,7 +571,7 @@ static void writepages_finish(struct
ceph_osd_request *req,
long writeback_stat;
unsigned issued = ceph_caps_issued(ci);
- osd_data = &req->r_data_out;
+ osd_data = osd_req_op_extent_osd_data(req, 0, true);
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
num_pages = calc_pages_for((u64)osd_data->alignment,
(u64)osd_data->length);
@@ -917,9 +916,8 @@ get_more_pages:
dout("writepages got %d pages at %llu~%llu\n",
locked_pages, offset, len);
- BUG_ON(req->r_ops[0].extent.osd_data != &req->r_data_out);
- ceph_osd_data_pages_init(req->r_ops[0].extent.osd_data, pages,
- len, 0, !!pool, false);
+ osd_req_op_extent_osd_data_pages(req, 0, true, pages, len, 0,
+ !!pool, false);
pages = NULL; /* request message now owns the pages array */
pool = NULL;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 66d0938..b7e6caa 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -574,8 +574,7 @@ more:
own_pages = true;
}
}
- BUG_ON(req->r_ops[0].extent.osd_data != &req->r_data_out);
- ceph_osd_data_pages_init(req->r_ops[0].extent.osd_data, pages, len,
+ osd_req_op_extent_osd_data_pages(req, 0, true, pages, len,
page_align, false, own_pages);
/* BUG_ON(vino.snap != CEPH_NOSNAP); */
diff --git a/include/linux/ceph/osd_client.h
b/include/linux/ceph/osd_client.h
index 71c4157..f8a00b4 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -240,17 +240,39 @@ extern void osd_req_op_extent_init(struct
ceph_osd_request *osd_req,
u64 truncate_size, u32 truncate_seq);
extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
unsigned int which, u64 length);
-extern void osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
+
+extern struct ceph_osd_data *osd_req_op_extent_osd_data(
+ struct ceph_osd_request *osd_req,
+ unsigned int which, bool write_request);
+extern struct ceph_osd_data *osd_req_op_cls_response_data(
+ struct ceph_osd_request *osd_req,
+ unsigned int which);
+
+extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
+ unsigned int which, bool write_request,
+ struct page **pages, u64 length,
+ u32 alignment, bool pages_from_pool,
+ bool own_pages);
+extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
+ unsigned int which, bool write_request,
+ struct ceph_pagelist *pagelist);
+#ifdef CONFIG_BLOCK
+extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
+ unsigned int which, bool write_request,
+ struct bio *bio, size_t bio_length);
+#endif /* CONFIG_BLOCK */
+
+extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
unsigned int which,
- struct ceph_osd_data *osd_data);
+ 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,
const void *request_data,
size_t request_data_size);
-extern void osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
- unsigned int which,
- struct ceph_osd_data *response_data);
extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
u64 cookie, u64 version, int flag);
@@ -290,17 +312,6 @@ static inline void ceph_osdc_put_request(struct
ceph_osd_request *req)
kref_put(&req->r_kref, ceph_osdc_release_request);
}
-extern void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
- struct page **pages, u64 length,
- u32 alignment, bool pages_from_pool,
- bool own_pages);
-extern void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
- struct ceph_pagelist *pagelist);
-#ifdef CONFIG_BLOCK
-extern void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
- struct bio *bio, size_t bio_length);
-#endif /* CONFIG_BLOCK */
-
extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req,
bool nofail);
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 40466ab..86cb524 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1,3 +1,4 @@
+
#include <linux/ceph/ceph_debug.h>
#include <linux/module.h>
@@ -81,11 +82,11 @@ static int calc_layout(struct ceph_file_layout
*layout, u64 off, u64 *plen,
static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
{
- memset(osd_data, 0, sizeof *osd_data);
+ memset(osd_data, 0, sizeof (*osd_data));
osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
}
-void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
+static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
struct page **pages, u64 length, u32 alignment,
bool pages_from_pool, bool own_pages)
{
@@ -96,27 +97,131 @@ void ceph_osd_data_pages_init(struct ceph_osd_data
*osd_data,
osd_data->pages_from_pool = pages_from_pool;
osd_data->own_pages = own_pages;
}
-EXPORT_SYMBOL(ceph_osd_data_pages_init);
-void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
+static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
struct ceph_pagelist *pagelist)
{
osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
osd_data->pagelist = pagelist;
}
-EXPORT_SYMBOL(ceph_osd_data_pagelist_init);
#ifdef CONFIG_BLOCK
-void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
+static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
struct bio *bio, size_t bio_length)
{
osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
osd_data->bio = bio;
osd_data->bio_length = bio_length;
}
-EXPORT_SYMBOL(ceph_osd_data_bio_init);
#endif /* CONFIG_BLOCK */
+struct ceph_osd_data *
+osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
+ unsigned int which, bool write_request)
+{
+ BUG_ON(which >= osd_req->r_num_ops);
+
+ /* return &osd_req->r_ops[which].extent.osd_data; */
+ return write_request ? &osd_req->r_data_out : &osd_req->r_data_in;
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data);
+
+struct ceph_osd_data *
+osd_req_op_cls_request_info(struct ceph_osd_request *osd_req,
+ unsigned int which)
+{
+ BUG_ON(which >= osd_req->r_num_ops);
+
+ /* return &osd_req->r_ops[which].cls.request_info; */
+ return &osd_req->r_data_out; /* Request data is outgoing */
+}
+EXPORT_SYMBOL(osd_req_op_cls_request_info); /* ??? */
+
+struct ceph_osd_data *
+osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
+ unsigned int which)
+{
+ BUG_ON(which >= osd_req->r_num_ops);
+
+ /* return &osd_req->r_ops[which].cls.response_data; */
+ return &osd_req->r_data_in; /* Response data is incoming */
+}
+EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
+
+void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
+ unsigned int which, bool write_request,
+ struct page **pages, u64 length, u32 alignment,
+ bool pages_from_pool, bool own_pages)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
+ ceph_osd_data_pages_init(osd_data, pages, length, alignment,
+ pages_from_pool, own_pages);
+
+ osd_req->r_ops[which].extent.osd_data =
+ osd_req_op_extent_osd_data(osd_req, which, write_request);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
+
+void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
+ unsigned int which, bool write_request,
+ struct ceph_pagelist *pagelist)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
+ ceph_osd_data_pagelist_init(osd_data, pagelist);
+
+ osd_req->r_ops[which].extent.osd_data =
+ osd_req_op_extent_osd_data(osd_req, which, write_request);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
+
+#ifdef CONFIG_BLOCK
+void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
+ unsigned int which, bool write_request,
+ struct bio *bio, size_t bio_length)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_extent_osd_data(osd_req, which, write_request);
+ ceph_osd_data_bio_init(osd_data, bio, bio_length);
+
+ osd_req->r_ops[which].extent.osd_data =
+ osd_req_op_extent_osd_data(osd_req, which, write_request);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
+#endif /* CONFIG_BLOCK */
+
+static void osd_req_op_cls_request_info_pagelist(
+ struct ceph_osd_request *osd_req,
+ unsigned int which, struct ceph_pagelist *pagelist)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_cls_request_info(osd_req, which);
+ ceph_osd_data_pagelist_init(osd_data, pagelist);
+
+ osd_req->r_ops[which].cls.request_info =
+ osd_req_op_cls_request_info(osd_req, which);
+}
+
+void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
+ unsigned int which, struct page **pages, u64 length,
+ u32 alignment, bool pages_from_pool, bool own_pages)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_cls_response_data(osd_req, which);
+ ceph_osd_data_pages_init(osd_data, pages, length, alignment,
+ pages_from_pool, own_pages);
+
+ osd_req->r_ops[which].cls.response_data =
+ osd_req_op_cls_response_data(osd_req, which);
+}
+EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
+
static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
{
switch (osd_data->type) {
@@ -385,15 +490,6 @@ void osd_req_op_extent_update(struct
ceph_osd_request *osd_req,
}
EXPORT_SYMBOL(osd_req_op_extent_update);
-void osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
- unsigned int which,
- struct ceph_osd_data *osd_data)
-{
- BUG_ON(which >= osd_req->r_num_ops);
- osd_req->r_ops[which].extent.osd_data = osd_data;
-}
-EXPORT_SYMBOL(osd_req_op_extent_osd_data);
-
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int
which,
u16 opcode, const char *class, const char *method,
const void *request_data, size_t request_data_size)
@@ -429,22 +525,13 @@ void osd_req_op_cls_init(struct ceph_osd_request
*osd_req, unsigned int which,
ceph_pagelist_append(pagelist, request_data, request_data_size);
payload_len += request_data_size;
- op->cls.request_info = &osd_req->r_data_out;
- ceph_osd_data_pagelist_init(op->cls.request_info, pagelist);
+ osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
op->cls.argc = 0; /* currently unused */
op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
-void osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
- unsigned int which,
- struct ceph_osd_data *response_data)
-{
- BUG_ON(which >= osd_req->r_num_ops);
- osd_req->r_ops[which].cls.response_data = response_data;
-}
-EXPORT_SYMBOL(osd_req_op_cls_response_data);
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode,
@@ -547,7 +634,6 @@ struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client *osdc,
bool use_mempool)
{
struct ceph_osd_request *req;
- struct ceph_osd_data *osd_data;
u64 objnum = 0;
u64 objoff = 0;
u64 objlen = 0;
@@ -561,8 +647,6 @@ struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client *osdc,
GFP_NOFS);
if (!req)
return ERR_PTR(-ENOMEM);
- osd_data = opcode == CEPH_OSD_OP_WRITE ? &req->r_data_out
- : &req->r_data_in;
req->r_flags = flags;
@@ -585,7 +669,6 @@ struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client *osdc,
osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
truncate_size, truncate_seq);
- osd_req_op_extent_osd_data(req, 0, osd_data);
/*
* A second op in the ops array means the caller wants to
@@ -2171,8 +2254,8 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
/* it may be a short read due to an object boundary */
- ceph_osd_data_pages_init(&req->r_data_in, pages, *plen, page_align,
- false, false);
+ osd_req_op_extent_osd_data_pages(req, 0, false,
+ pages, *plen, page_align, false, false);
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
off, *plen, *plen, page_align);
@@ -2214,7 +2297,7 @@ int ceph_osdc_writepages(struct ceph_osd_client
*osdc, struct ceph_vino vino,
return PTR_ERR(req);
/* it may be a short write due to an object boundary */
- ceph_osd_data_pages_init(&req->r_data_out, pages, len, page_align,
+ osd_req_op_extent_osd_data_pages(req, 0, true, pages, len, page_align,
false, false);
dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
@@ -2308,8 +2391,14 @@ static struct ceph_msg *get_reply(struct
ceph_connection *con,
m = ceph_msg_get(req->r_reply);
if (data_len > 0) {
- struct ceph_osd_data *osd_data = &req->r_data_in;
+ struct ceph_osd_data *osd_data;
+ /*
+ * XXX This is assuming there is only one op containing
+ * XXX page data. Probably OK for reads, but this
+ * XXX ought to be done more generally.
+ */
+ osd_data = osd_req_op_extent_osd_data(req, 0, false);
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
if (osd_data->pages &&
unlikely(osd_data->length < data_len)) {
