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authorDavid Zafman <david.zafman@inktank.com>2012-12-03 19:14:05 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-17 08:51:21 -0800
commit359c4ea7baf79484cc3561f0040f9d5e367155fe (patch)
treebe40ee8e7c951feba5c2e3612205e644acd1afce
parent57d93df8f18dbe66c0e2e1089ed2c120a9b980af (diff)
downloadlinux-linaro-stable-359c4ea7baf79484cc3561f0040f9d5e367155fe.tar.gz
libceph: Unlock unprocessed pages in start_read() error path
Function start_read() can get an error before processing all pages. It must not only release the remaining pages, but unlock them too. This fixes http://tracker.newdream.net/issues/3370 Signed-off-by: David Zafman <david.zafman@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com> (cherry picked from commit 8884d53dd63b1d9315b343564fcbe1ede004a99e) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/ceph/addr.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e009fde39cf6..bb01881cb1f2 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -267,6 +267,14 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
kfree(req->r_pages);
}
+static void ceph_unlock_page_vector(struct page **pages, int num_pages)
+{
+ int i;
+
+ for (i = 0; i < num_pages; i++)
+ unlock_page(pages[i]);
+}
+
/*
* start an async read(ahead) operation. return nr_pages we submitted
* a read for on success, or negative error code.
@@ -347,6 +355,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
return nr_pages;
out_pages:
+ ceph_unlock_page_vector(pages, nr_pages);
ceph_release_page_vector(pages, nr_pages);
out:
ceph_osdc_put_request(req);