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libceph: define osd data initialization helpers

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Define and use functions that encapsulate the initializion of a
ceph_osd_data structure.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-03 01:28:57 -05:00 • committed by Sage Weil
parent 9fc6e06471
commit 43bfe5de9f
5 changed files with 63 additions and 40 deletions
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55
net/ceph/osd_client.c
View file

@ -79,6 +79,38 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
return 0;
}
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)
{
osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
osd_data->pages = pages;
osd_data->length = length;
osd_data->alignment = alignment;
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,
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,
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 */
/*
* requests
*/
@ -400,8 +432,7 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
ceph_pagelist_append(pagelist, src->cls.indata,
src->cls.indata_len);
req->r_data_out.type = CEPH_OSD_DATA_TYPE_PAGELIST;
req->r_data_out.pagelist = pagelist;
ceph_osd_data_pagelist_init(&req->r_data_out, pagelist);
out_data_len = pagelist->length;
break;
case CEPH_OSD_OP_STARTSYNC:
@ -2056,7 +2087,6 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
struct page **pages, int num_pages, int page_align)
{
struct ceph_osd_request *req;
struct ceph_osd_data *osd_data;
struct ceph_osd_req_op op;
int rc = 0;
@ -2071,14 +2101,11 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
/* it may be a short read due to an object boundary */
osd_data = &req->r_data_in;
osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
osd_data->pages = pages;
osd_data->length = *plen;
osd_data->alignment = page_align;
ceph_osd_data_pages_init(&req->r_data_in, pages, *plen, page_align,
false, false);
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
off, *plen, osd_data->length, page_align);
off, *plen, *plen, page_align);
ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
@ -2104,7 +2131,6 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
struct page **pages, int num_pages)
{
struct ceph_osd_request *req;
struct ceph_osd_data *osd_data;
struct ceph_osd_req_op op;
int rc = 0;
int page_align = off & ~PAGE_MASK;
@ -2119,12 +2145,9 @@ 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 */
osd_data = &req->r_data_out;
osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
osd_data->pages = pages;
osd_data->length = len;
osd_data->alignment = page_align;
dout("writepages %llu~%llu (%llu bytes)\n", off, len, osd_data->length);
ceph_osd_data_pages_init(&req->r_data_out, pages, len, page_align,
false, false);
dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
ceph_osdc_build_request(req, off, 1, &op, snapc, CEPH_NOSNAP, mtime);