openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ceph: fold ceph_sync_readpages into ceph_readpage 

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2020-05-14 12:05:45 -04:00 committed by Ilya Dryomov
parent d45156bf46
commit 9b4862ecae
1 changed files with 25 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
fs/ceph/addr.c
View File

@ -182,58 +182,15 @@ static int ceph_releasepage(struct page *page, gfp_t g)
return !PagePrivate(page);
}
/*
* Read some contiguous pages. If we cross a stripe boundary, shorten
* *plen. Return number of bytes read, or error.
*/
static int ceph_sync_readpages(struct ceph_fs_client *fsc,
struct ceph_vino vino,
struct ceph_file_layout *layout,
u64 off, u64 *plen,
u32 truncate_seq, u64 truncate_size,
struct page **pages, int num_pages,
int page_align)
{
struct ceph_osd_client *osdc = &fsc->client->osdc;
struct ceph_osd_request *req;
int rc = 0;
dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
vino.snap, off, *plen);
req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
NULL, truncate_seq, truncate_size,
false);
if (IS_ERR(req))
return PTR_ERR(req);
/* it may be a short read due to an object boundary */
osd_req_op_extent_osd_data_pages(req, 0,
pages, *plen, page_align, false, false);
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
off, *plen, *plen, page_align);
rc = ceph_osdc_start_request(osdc, req, false);
if (!rc)
rc = ceph_osdc_wait_request(osdc, req);
ceph_update_read_latency(&fsc->mdsc->metric, req->r_start_latency,
req->r_end_latency, rc);
ceph_osdc_put_request(req);
dout("readpages result %d\n", rc);
return rc;
}
/*
* read a single page, without unlocking it.
*/
/* read a single page, without unlocking it. */
static int ceph_do_readpage(struct file *filp, struct page *page)
{
struct inode *inode = file_inode(filp);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_osd_client *osdc = &fsc->client->osdc;
struct ceph_osd_request *req;
struct ceph_vino vino = ceph_vino(inode);
int err = 0;
u64 off = page_offset(page);
u64 len = PAGE_SIZE;
@ -260,12 +217,27 @@ static int ceph_do_readpage(struct file *filp, struct page *page)
if (err == 0)
return -EINPROGRESS;
dout("readpage inode %p file %p page %p index %lu\n",
inode, filp, page, page->index);
err = ceph_sync_readpages(fsc, ceph_vino(inode),
&ci->i_layout, off, &len,
ci->i_truncate_seq, ci->i_truncate_size,
&page, 1, 0);
dout("readpage ino %llx.%llx file %p off %llu len %llu page %p index %lu\n",
vino.ino, vino.snap, filp, off, len, page, page->index);
req = ceph_osdc_new_request(osdc, &ci->i_layout, vino, off, &len, 0, 1,
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, NULL,
ci->i_truncate_seq, ci->i_truncate_size,
false);
if (IS_ERR(req))
return PTR_ERR(req);
osd_req_op_extent_osd_data_pages(req, 0, &page, len, 0, false, false);
err = ceph_osdc_start_request(osdc, req, false);
if (!err)
err = ceph_osdc_wait_request(osdc, req);
ceph_update_read_latency(&fsc->mdsc->metric, req->r_start_latency,
req->r_end_latency, err);
ceph_osdc_put_request(req);
dout("readpage result %d\n", err);
if (err == -ENOENT)
err = 0;
if (err < 0) {