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libceph: kill ceph message bio_iter, bio_seg 

The bio_iter and bio_seg fields in a message are no longer used, we
use the cursor instead.  So get rid of them and the functions that
operate on them them.

This is related to:
    http://tracker.ceph.com/issues/4428

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-03-11 23:34:23 -05:00 committed by Sage Weil
parent 463207aa40
commit 6518be47f9
2 changed files with 1 additions and 36 deletions
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6
include/linux/ceph/messenger.h
View File

@ -121,11 +121,7 @@ struct ceph_msg_data {
enum ceph_msg_data_type type;
union {
#ifdef CONFIG_BLOCK
struct {
struct bio *bio_iter; /* iterator */
struct bio *bio;
unsigned int bio_seg; /* current seg in bio */
};
struct bio *bio;
#endif /* CONFIG_BLOCK */
struct {
struct page **pages; /* NOT OWNER. */

31
net/ceph/messenger.c
View File

@ -716,29 +716,6 @@ static void con_out_kvec_add(struct ceph_connection *con,
}
#ifdef CONFIG_BLOCK
static void init_bio_iter(struct bio *bio, struct bio **bio_iter,
unsigned int *bio_seg)
{
if (!bio) {
*bio_iter = NULL;
*bio_seg = 0;
return;
}
*bio_iter = bio;
*bio_seg = (unsigned int) bio->bi_idx;
}
static void iter_bio_next(struct bio **bio_iter, unsigned int *seg)
{
if (*bio_iter == NULL)
return;
BUG_ON(*seg >= (*bio_iter)->bi_vcnt);
(*seg)++;
if (*seg == (*bio_iter)->bi_vcnt)
init_bio_iter((*bio_iter)->bi_next, bio_iter, seg);
}
/*
* For a bio data item, a piece is whatever remains of the next
@ -1112,10 +1089,6 @@ static void prepare_message_data(struct ceph_msg *msg,
msg_pos->page_pos = msg->p.alignment;
else
msg_pos->page_pos = 0;
#ifdef CONFIG_BLOCK
if (ceph_msg_has_bio(msg))
init_bio_iter(msg->b.bio, &msg->b.bio_iter, &msg->b.bio_seg);
#endif
msg_pos->data_pos = 0;
/* Initialize data cursors */
@ -1478,10 +1451,6 @@ static void in_msg_pos_next(struct ceph_connection *con, size_t len,
BUG_ON(received != len);
msg_pos->page_pos = 0;
msg_pos->page++;
#ifdef CONFIG_BLOCK
if (msg->b.bio)
iter_bio_next(&msg->b.bio_iter, &msg->b.bio_seg);
#endif /* CONFIG_BLOCK */
}
static u32 ceph_crc32c_page(u32 crc, struct page *page,