From: Yehuda Sadeh Date: Tue, 9 Feb 2010 19:08:40 +0000 (-0800) Subject: ceph: fix truncation when not holding caps X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3d497d858ae6e5f23a28783030aecc69074e102d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git ceph: fix truncation when not holding caps A truncation should occur when either we have the specified caps for the file, or (in cases where we are not the only ones referencing the file) when it is mapped or when it is opened. The latter two cases were not handled. Signed-off-by: Yehuda Sadeh Signed-off-by: Sage Weil --- diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index a4f573ab232e..af85f2de2f7c 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -416,9 +416,17 @@ int ceph_fill_file_size(struct inode *inode, int issued, dout("truncate_seq %u -> %u\n", ci->i_truncate_seq, truncate_seq); ci->i_truncate_seq = truncate_seq; - if (issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| + /* + * If we hold relevant caps, or in the case where we're + * not the only client referencing this file and we + * don't hold those caps, then we need to check whether + * the file is either opened or mmaped + */ + if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| - CEPH_CAP_FILE_EXCL)) { + CEPH_CAP_FILE_EXCL)) || + mapping_mapped(inode->i_mapping) || + __ceph_caps_file_wanted(ci)) { ci->i_truncate_pending++; queue_trunc = 1; }