summaryrefslogtreecommitdiffstats
path: root/net/ceph/pagevec.c
diff options
context:
space:
mode:
authorHenry C Chang <henry_c_chang@tcloudcomputing.com>2010-12-16 05:45:41 +0100
committerSage Weil <sage@newdream.net>2010-12-17 18:54:40 +0100
commitb6aa5901c7a2bd90d0b6b9866300d2648b2568f3 (patch)
tree1161ed9dbacb7ace73c5d48fc9acd1db0d7815d5 /net/ceph/pagevec.c
parentceph: fix null pointer dereference in ceph_init_dentry for nfs reexport (diff)
downloadlinux-b6aa5901c7a2bd90d0b6b9866300d2648b2568f3.tar.xz
linux-b6aa5901c7a2bd90d0b6b9866300d2648b2568f3.zip
ceph: mark user pages dirty on direct-io reads
For read operation, we have to set the argument _write_ of get_user_pages to 1 since we will write data to pages. Also, we need to SetPageDirty before releasing these pages. Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'net/ceph/pagevec.c')
-rw-r--r--net/ceph/pagevec.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
index ac34feeb2b3a..01947a5d03b7 100644
--- a/net/ceph/pagevec.c
+++ b/net/ceph/pagevec.c
@@ -13,7 +13,7 @@
* build a vector of user pages
*/
struct page **ceph_get_direct_page_vector(const char __user *data,
- int num_pages)
+ int num_pages, bool write_page)
{
struct page **pages;
int rc;
@@ -24,7 +24,7 @@ struct page **ceph_get_direct_page_vector(const char __user *data,
down_read(&current->mm->mmap_sem);
rc = get_user_pages(current, current->mm, (unsigned long)data,
- num_pages, 0, 0, pages, NULL);
+ num_pages, write_page, 0, pages, NULL);
up_read(&current->mm->mmap_sem);
if (rc < 0)
goto fail;
@@ -36,12 +36,15 @@ fail:
}
EXPORT_SYMBOL(ceph_get_direct_page_vector);
-void ceph_put_page_vector(struct page **pages, int num_pages)
+void ceph_put_page_vector(struct page **pages, int num_pages, bool dirty)
{
int i;
- for (i = 0; i < num_pages; i++)
+ for (i = 0; i < num_pages; i++) {
+ if (dirty)
+ set_page_dirty_lock(pages[i]);
put_page(pages[i]);
+ }
kfree(pages);
}
EXPORT_SYMBOL(ceph_put_page_vector);