ceph: stop copying to iter at EOF on sync reads

[linux-2.6-block.git] / fs / ceph / file.c

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index abe8028d95bf4e3e99091d83cf1784f2b9a249e1..3d1cd079dbf1692e979e57ad01b7729c4840539d 100644 (file)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1138,7 +1138,12 @@ ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos,
                }
 
                idx = 0;
-               left = ret > 0 ? ret : 0;
+               if (ret <= 0)
+                       left = 0;
+               else if (off + ret > i_size)
+                       left = i_size - off;
+               else
+                       left = ret;
                while (left > 0) {
                        size_t plen, copied;
 
@@ -1167,15 +1172,13 @@ ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos,
        }
 
        if (ret > 0) {
-               if (off > *ki_pos) {
-                       if (off >= i_size) {
-                               *retry_op = CHECK_EOF;
-                               ret = i_size - *ki_pos;
-                               *ki_pos = i_size;
-                       } else {
-                               ret = off - *ki_pos;
-                               *ki_pos = off;
-                       }
+               if (off >= i_size) {
+                       *retry_op = CHECK_EOF;
+                       ret = i_size - *ki_pos;
+                       *ki_pos = i_size;
+               } else {
+                       ret = off - *ki_pos;
+                       *ki_pos = off;
                }
 
                if (last_objver)