Commit ee7289bf authored Aug 21, 2013 by majianpeng Committed by Sage Weil Aug 27, 2013

ceph: allow sync_read/write return partial successed size of read/write.



For sync_read/write, it may do multi stripe operations.If one of those
met erro, we return the former successed size rather than a error value.
There is a exception for write-operation met -EOLDSNAPC.If this occur,we
retry the whole write again.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>

parent 02ae66d8

fs/ceph/file.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -374,7 +374,7 @@ more:
		goto more;
		}

		if (ret >= 0) {
		if (read > 0) {
		ret = read;
		/* did we bounce off eof? */
		if (pos + left > inode->i_size)
		@@ -612,6 +612,8 @@ out:
		if (check_caps)
		ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY,
		NULL);
		} else if (ret != -EOLDSNAPC && written > 0) {
		ret = written;
		}
		return ret;
		}

Admin message