ceph: use i_size_{read,write} to get/set i_size
Cap message from MDS can update i_size. In that case, we don't
hold i_mutex. So it's unsafe to directly access inode->i_size
while holding i_mutex.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index a4766de..16e7f7b 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -106,7 +106,7 @@
memset(&aux, 0, sizeof(aux));
aux.mtime = inode->i_mtime;
- aux.size = inode->i_size;
+ aux.size = i_size_read(inode);
memcpy(buffer, &aux, sizeof(aux));
@@ -117,9 +117,7 @@
uint64_t *size)
{
const struct ceph_inode_info* ci = cookie_netfs_data;
- const struct inode* inode = &ci->vfs_inode;
-
- *size = inode->i_size;
+ *size = i_size_read(&ci->vfs_inode);
}
static enum fscache_checkaux ceph_fscache_inode_check_aux(
@@ -134,7 +132,7 @@
memset(&aux, 0, sizeof(aux));
aux.mtime = inode->i_mtime;
- aux.size = inode->i_size;
+ aux.size = i_size_read(inode);
if (memcmp(data, &aux, sizeof(aux)) != 0)
return FSCACHE_CHECKAUX_OBSOLETE;