tree 7bccb0c4e29d94baaf8c30e008ec5aebdccf9c57
parent 7af8f1e4aa86720840d3318e4dc225c3c7e5a6d0
author Sage Weil <sage@newdream.net> 1267485416 -0800
committer Sage Weil <sage@newdream.net> 1267486082 -0800

ceph: fix flush_dirty_caps race with caps migration

The flush_dirty_caps() used to loop over the first entry of the cap_dirty
dirty list on the assumption that after calling ceph_check_caps() it would
be removed from the list.  This isn't true for caps that are being
migrated between MDSs, where we've received the EXPORT but not the IMPORT.

Instead, do a safe list iteration, and pin the next inode on the list via
the CEPH_I_NOFLUSH flag.

Signed-off-by: Sage Weil <sage@newdream.net>