Re: [PATCH 6/6] libceph: add, don't set data for a message

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Reviewed-by: Josh Durgin <josh.durgin@xxxxxxxxxxx>

On 04/05/2013 03:26 PM, Alex Elder wrote:
Change the names of the functions that put data on a pagelist to
reflect that we're adding to whatever's already there rather than
just setting it to the one thing.  Currently only one data item is
ever added to a message, but that's about to change.

This resolves:
     http://tracker.ceph.com/issues/2770

Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
  fs/ceph/mds_client.c           |    4 ++--
  include/linux/ceph/messenger.h |    6 +++---
  net/ceph/messenger.c           |   12 ++++++------
  net/ceph/osd_client.c          |   16 ++++++++--------
  4 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index c07ab3c..15c265c 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1724,7 +1724,7 @@ static struct ceph_msg
*create_request_message(struct ceph_mds_client *mdsc,
  	if (req->r_data_len) {
  		/* outbound data set only by ceph_sync_setxattr() */
  		BUG_ON(!req->r_pages);
-		ceph_msg_data_set_pages(msg, req->r_pages, req->r_data_len, 0);
+		ceph_msg_data_add_pages(msg, req->r_pages, req->r_data_len, 0);
  	}

  	msg->hdr.data_len = cpu_to_le32(req->r_data_len);
@@ -2608,7 +2608,7 @@ static void send_mds_reconnect(struct
ceph_mds_client *mdsc,
  	if (pagelist->length) {
  		/* set up outbound data if we have any */
  		reply->hdr.data_len = cpu_to_le32(pagelist->length);
-		ceph_msg_data_set_pagelist(reply, pagelist);
+		ceph_msg_data_add_pagelist(reply, pagelist);
  	}
  	ceph_con_send(&session->s_con, reply);

diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index de1d2e1..7c1420b 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -275,12 +275,12 @@ extern void ceph_msg_revoke_incoming(struct
ceph_msg *msg);

  extern void ceph_con_keepalive(struct ceph_connection *con);

-extern void ceph_msg_data_set_pages(struct ceph_msg *msg, struct page
**pages,
+extern void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page
**pages,
  				size_t length, size_t alignment);
-extern void ceph_msg_data_set_pagelist(struct ceph_msg *msg,
+extern void ceph_msg_data_add_pagelist(struct ceph_msg *msg,
  				struct ceph_pagelist *pagelist);
  #ifdef CONFIG_BLOCK
-extern void ceph_msg_data_set_bio(struct ceph_msg *msg, struct bio *bio,
+extern void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio,
  				size_t length);
  #endif /* CONFIG_BLOCK */

diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 3f78944..c46c4df 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -3003,7 +3003,7 @@ static void ceph_msg_data_destroy(struct
ceph_msg_data *data)
  	kfree(data);
  }

-void ceph_msg_data_set_pages(struct ceph_msg *msg, struct page **pages,
+void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages,
  		size_t length, size_t alignment)
  {
  	struct ceph_msg_data *data;
@@ -3023,9 +3023,9 @@ void ceph_msg_data_set_pages(struct ceph_msg *msg,
struct page **pages,
  	list_add_tail(&data->links, &msg->data);
  	msg->data_length += length;
  }
-EXPORT_SYMBOL(ceph_msg_data_set_pages);
+EXPORT_SYMBOL(ceph_msg_data_add_pages);

-void ceph_msg_data_set_pagelist(struct ceph_msg *msg,
+void ceph_msg_data_add_pagelist(struct ceph_msg *msg,
  				struct ceph_pagelist *pagelist)
  {
  	struct ceph_msg_data *data;
@@ -3042,10 +3042,10 @@ void ceph_msg_data_set_pagelist(struct ceph_msg
*msg,
  	list_add_tail(&data->links, &msg->data);
  	msg->data_length += pagelist->length;
  }
-EXPORT_SYMBOL(ceph_msg_data_set_pagelist);
+EXPORT_SYMBOL(ceph_msg_data_add_pagelist);

  #ifdef	CONFIG_BLOCK
-void ceph_msg_data_set_bio(struct ceph_msg *msg, struct bio *bio,
+void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio,
  		size_t length)
  {
  	struct ceph_msg_data *data;
@@ -3062,7 +3062,7 @@ void ceph_msg_data_set_bio(struct ceph_msg *msg,
struct bio *bio,
  	list_add_tail(&data->links, &msg->data);
  	msg->data_length += length;
  }
-EXPORT_SYMBOL(ceph_msg_data_set_bio);
+EXPORT_SYMBOL(ceph_msg_data_add_bio);
  #endif	/* CONFIG_BLOCK */

  /*
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 2562e4e..7322785 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -550,7 +550,7 @@ void osd_req_op_watch_init(struct ceph_osd_request
*osd_req,
  }
  EXPORT_SYMBOL(osd_req_op_watch_init);

-static void ceph_osdc_msg_data_set(struct ceph_msg *msg,
+static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
  				struct ceph_osd_data *osd_data)
  {
  	u64 length = ceph_osd_data_length(osd_data);
@@ -558,14 +558,14 @@ static void ceph_osdc_msg_data_set(struct ceph_msg
*msg,
  	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
  		BUG_ON(length > (u64) SIZE_MAX);
  		if (length)
-			ceph_msg_data_set_pages(msg, osd_data->pages,
+			ceph_msg_data_add_pages(msg, osd_data->pages,
  					length, osd_data->alignment);
  	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
  		BUG_ON(!length);
-		ceph_msg_data_set_pagelist(msg, osd_data->pagelist);
+		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
  #ifdef CONFIG_BLOCK
  	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
-		ceph_msg_data_set_bio(msg, osd_data->bio, length);
+		ceph_msg_data_add_bio(msg, osd_data->bio, length);
  #endif
  	} else {
  		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
@@ -600,18 +600,18 @@ static u64 osd_req_encode_op(struct
ceph_osd_request *req,
  		dst->extent.truncate_seq =
  			cpu_to_le32(src->extent.truncate_seq);
  		if (src->op == CEPH_OSD_OP_WRITE)
-			ceph_osdc_msg_data_set(req->r_request,
+			ceph_osdc_msg_data_add(req->r_request,
  						&src->extent.osd_data);
  		else
-			ceph_osdc_msg_data_set(req->r_reply,
+			ceph_osdc_msg_data_add(req->r_reply,
  						&src->extent.osd_data);
  		break;
  	case CEPH_OSD_OP_CALL:
  		dst->cls.class_len = src->cls.class_len;
  		dst->cls.method_len = src->cls.method_len;
  		dst->cls.indata_len = cpu_to_le32(src->cls.request_data_len);
-		ceph_osdc_msg_data_set(req->r_reply, &src->cls.response_data);
-		ceph_osdc_msg_data_set(req->r_request, &src->cls.request_info);
+		ceph_osdc_msg_data_add(req->r_reply, &src->cls.response_data);
+		ceph_osdc_msg_data_add(req->r_request, &src->cls.request_info);
  		BUG_ON(src->cls.request_info.type !=
  					CEPH_OSD_DATA_TYPE_PAGELIST);
  		request_data_len = src->cls.request_info.pagelist->length;


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