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/inode.c b/fs/ceph/inode.c
index 498dcfa..eb7cb91 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -548,7 +548,7 @@
if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
(truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
dout("size %lld -> %llu\n", inode->i_size, size);
- inode->i_size = size;
+ i_size_write(inode, size);
inode->i_blocks = (size + (1<<9) - 1) >> 9;
ci->i_reported_size = size;
if (truncate_seq != ci->i_truncate_seq) {
@@ -808,7 +808,7 @@
spin_unlock(&ci->i_ceph_lock);
err = -EINVAL;
- if (WARN_ON(symlen != inode->i_size))
+ if (WARN_ON(symlen != i_size_read(inode)))
goto out;
err = -ENOMEM;
@@ -1549,7 +1549,7 @@
spin_lock(&ci->i_ceph_lock);
dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
- inode->i_size = size;
+ i_size_write(inode, size);
inode->i_blocks = (size + (1 << 9) - 1) >> 9;
/* tell the MDS if we are approaching max_size */
@@ -1911,7 +1911,7 @@
inode->i_size, attr->ia_size);
if ((issued & CEPH_CAP_FILE_EXCL) &&
attr->ia_size > inode->i_size) {
- inode->i_size = attr->ia_size;
+ i_size_write(inode, attr->ia_size);
inode->i_blocks =
(attr->ia_size + (1 << 9) - 1) >> 9;
inode->i_ctime = attr->ia_ctime;