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authorYan, Zheng <zyan@redhat.com>2015-12-30 11:32:46 +0800
committerIlya Dryomov <idryomov@gmail.com>2016-01-21 19:36:08 +0100
commit99c88e6900fb05d267ae9f6d5e15dc7192ba6f8d (patch)
tree025263471172932f2c0b332979cf56c60ae836db /fs/ceph/cache.c
parent5be0389dac662995eade757ec678931f0be23d33 (diff)
downloadlinux-99c88e6900fb05d267ae9f6d5e15dc7192ba6f8d.tar.bz2
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>
Diffstat (limited to 'fs/ceph/cache.c')
-rw-r--r--fs/ceph/cache.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index a4766ded1ba7..16e7f7b60691 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -106,7 +106,7 @@ static uint16_t ceph_fscache_inode_get_aux(const void *cookie_netfs_data,
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 @@ static void ceph_fscache_inode_get_attr(const void *cookie_netfs_data,
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 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux(
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;