Fix afs_getattr() to report the server's idea of the file size of a
directory rather than the local size. The local size may differ as we edit
the local copy to avoid having to redownload it and we may end up with a
differently structured blob of a different size.
However, if the directory is discarded from the pagecache we then download
it again and the user may see the directory file size apparently change.
Fixes: 63a4681ff39c ("afs: Locally edit directory data for mkdir/create/unlink/...")
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Marc Dionne <marc.dionne@xxxxxxxxxxxx>
cc: linux-afs@xxxxxxxxxxxxxxxxxxx
---
fs/afs/inode.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 82edd3351734..866bab860a88 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -450,7 +450,7 @@ static void afs_get_inode_cache(struct afs_vnode *vnode)
0 : FSCACHE_ADV_SINGLE_CHUNK,
&key, sizeof(key),
&aux, sizeof(aux),
- vnode->status.size));
+ i_size_read(&vnode->netfs.inode)));
#endif
}
@@ -777,6 +777,13 @@ int afs_getattr(struct mnt_idmap *idmap, const struct path *path,
if (test_bit(AFS_VNODE_SILLY_DELETED, &vnode->flags) &&
stat->nlink > 0)
stat->nlink -= 1;
+
+ /* Lie about the size of directories. We maintain a locally
+ * edited copy and may make different allocation decisions on
+ * it, but we need to give userspace the server's size.
+ */
+ if (S_ISDIR(inode->i_mode))
+ stat->size = vnode->netfs.remote_i_size;
} while (need_seqretry(&vnode->cb_lock, seq));
done_seqretry(&vnode->cb_lock, seq);
