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authorAlex Elder <elder@inktank.com>2013-02-14 12:16:43 -0600
committerSage Weil <sage@inktank.com>2013-05-01 21:16:25 -0700
commit2ac2b7a6d4976bd6b5dc0751aa77d12d48d3ac4c (patch)
treeaf95ff579ab1719871e8678ef530db46514c0eb7 /fs/ceph
parent2794a82a11cfeae0890741b18b0049ddb55ce646 (diff)
downloadlinux-2ac2b7a6d4976bd6b5dc0751aa77d12d48d3ac4c.tar.bz2
libceph: distinguish page and bio requests
An osd request uses either pages or a bio list for its data. Use a union to record information about the two, and add a data type tag to select between them. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/addr.c4
-rw-r--r--fs/ceph/file.c1
2 files changed, 5 insertions, 0 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 3a1a77b0ae9f..276fe96f12e3 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -243,6 +243,7 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
dout("finish_read %p req %p rc %d bytes %d\n", inode, req, rc, bytes);
/* unlock all pages, zeroing any data we didn't read */
+ BUG_ON(req->r_data.type != CEPH_OSD_DATA_TYPE_PAGES);
for (i = 0; i < req->r_data.num_pages; i++, bytes -= PAGE_CACHE_SIZE) {
struct page *page = req->r_data.pages[i];
@@ -336,6 +337,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
}
pages[i] = page;
}
+ req->r_data.type = CEPH_OSD_DATA_TYPE_PAGES;
req->r_data.pages = pages;
req->r_data.num_pages = nr_pages;
req->r_data.alignment = 0;
@@ -561,6 +563,7 @@ static void writepages_finish(struct ceph_osd_request *req,
long writeback_stat;
unsigned issued = ceph_caps_issued(ci);
+ BUG_ON(req->r_data.type != CEPH_OSD_DATA_TYPE_PAGES);
if (rc >= 0) {
/*
* Assume we wrote the pages we originally sent. The
@@ -830,6 +833,7 @@ get_more_pages:
break;
}
+ req->r_data.type = CEPH_OSD_DATA_TYPE_PAGES;
req->r_data.num_pages = calc_pages_for(0, len);
req->r_data.alignment = 0;
max_pages = req->r_data.num_pages;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index d35fc05af06f..3643a386ab23 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -571,6 +571,7 @@ more:
req->r_data.own_pages = 1;
}
}
+ req->r_data.type = CEPH_OSD_DATA_TYPE_PAGES;
req->r_data.pages = pages;
req->r_data.num_pages = num_pages;
req->r_data.alignment = page_align;