Commit 173e70e8 authored Feb 18, 2020 by Yan, Zheng Committed by Ilya Dryomov Mar 30, 2020

ceph: don't take refs to want mask unless we have all bits



If we don't have all of the cap bits for the want mask in
try_get_cap_refs, then just take refs on the need bits.

Signed-off-by: "Yan, Zheng" <ukernel@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

parent a25949b9

fs/ceph/caps.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -2666,7 +2666,10 @@ again:
		}
		snap_rwsem_locked = true;
		}
		*got = need \| (have & want);
		if ((have & want) == want)
		*got = need \| want;
		else
		*got = need;
		if (S_ISREG(inode->i_mode) &&
		(need & CEPH_CAP_FILE_RD) &&
		!(*got & CEPH_CAP_FILE_CACHE))

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