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libceph: hold off building osd request 

Defer building the osd request until just before submitting it in
all callers except ceph_writepages_start().  (That caller will be
handed in the next patch.)

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-03-14 14:09:06 -05:00 committed by Sage Weil
parent 88486957f9
commit 02ee07d300
3 changed files with 10 additions and 9 deletions
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4
fs/ceph/addr.c
View File

@ -319,8 +319,6 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
if (IS_ERR(req))
return PTR_ERR(req);
ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
/* build page vector */
nr_pages = calc_pages_for(0, len);
pages = kmalloc(sizeof(*pages) * nr_pages, GFP_NOFS);
@ -351,6 +349,8 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
req->r_callback = finish_read;
req->r_inode = inode;
ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
dout("start_read %p starting %p %lld~%lld\n", inode, req, off, len);
ret = ceph_osdc_start_request(osdc, req, false);
if (ret < 0)

7
fs/ceph/file.c
View File

@ -540,9 +540,6 @@ more:
if (IS_ERR(req))
return PTR_ERR(req);
ceph_osdc_build_request(req, pos, num_ops, ops,
snapc, vino.snap, &mtime);
/* write from beginning of first page, regardless of io alignment */
page_align = file->f_flags & O_DIRECT ? buf_align : io_align;
num_pages = calc_pages_for(page_align, len);
@ -583,6 +580,10 @@ more:
req->r_data_out.alignment = page_align;
req->r_inode = inode;
/* BUG_ON(vino.snap != CEPH_NOSNAP); */
ceph_osdc_build_request(req, pos, num_ops, ops,
snapc, vino.snap, &mtime);
ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
if (!ret) {
if (req->r_safe_callback) {

8
net/ceph/osd_client.c
View File

@ -2056,8 +2056,6 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
if (IS_ERR(req))
return PTR_ERR(req);
ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
/* it may be a short read due to an object boundary */
osd_data = &req->r_data_in;
@ -2069,6 +2067,8 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
off, *plen, osd_data->length, page_align);
ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
rc = ceph_osdc_start_request(osdc, req, false);
if (!rc)
rc = ceph_osdc_wait_request(osdc, req);
@ -2105,8 +2105,6 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
if (IS_ERR(req))
return PTR_ERR(req);
ceph_osdc_build_request(req, off, 1, &op, snapc, CEPH_NOSNAP, mtime);
/* 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;
@ -2115,6 +2113,8 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
osd_data->alignment = page_align;
dout("writepages %llu~%llu (%llu bytes)\n", off, len, osd_data->length);
ceph_osdc_build_request(req, off, 1, &op, snapc, CEPH_NOSNAP, mtime);
rc = ceph_osdc_start_request(osdc, req, true);
if (!rc)
rc = ceph_osdc_wait_request(osdc, req);