When nfsdcld was released, it was quickly deprecated in favor of the nfsdcltrack usermodehelper, so as to not require another running daemon. The nfsdcld code was removed from nfs-utils in 2012. That prevents NFSv4 clients from reclaiming locks from nfsd's running in containers, since neither nfsdcltrack nor the legacy client tracking code work in containers. These patches restore the nfsdcld code. These patches are intended to go alongside some kernel patches that introduce an enhancement that allows nfsd to "slurp" up the client records during client tracking initialization and store them internally in hash table. This enables nfsd to check whether an NFSv4 client is allowed to reclaim without having to do an upcall to nfsdcld. It also allows nfsd to decide to end the v4 grace period early if the number of RECLAIM_COMPLETE operations it has received from "known" clients is equal to the number of entries in the hash table. It also allows nfsd to skip the v4 grace period altogether if it knows there are no clients allowed to reclaim. The new nfsdcld code will work with older kernels, however in that case there is no ability for nfsd to exit the grace period early or skip the grace period altogether. Scott Mayhew (7): Revert "nfsdcltrack: remove the nfsdcld daemon" nfsdcld: move nfsdcld to its own directory nfsdcld: a few enhancements nfsdcld: remove some unused functions nfsdcld: the -p option should specify the rpc_pipefs mountpoint nfsdcld: add /etc/nfs.conf support systemd: add a unit file for nfsdcld .gitignore | 1 + configure.ac | 23 + nfs.conf | 4 + support/include/cld.h | 1 + systemd/nfs-server.service | 2 + systemd/nfsdcld.service | 11 + utils/Makefile.am | 4 + utils/nfsdcld/Makefile.am | 19 + utils/nfsdcld/cld-internal.h | 30 ++ utils/nfsdcld/nfsdcld.c | 761 +++++++++++++++++++++++++++++++ utils/nfsdcld/nfsdcld.man | 199 +++++++++ utils/nfsdcld/sqlite.c | 837 +++++++++++++++++++++++++++++++++++ utils/nfsdcld/sqlite.h | 33 ++ 13 files changed, 1925 insertions(+) create mode 100644 systemd/nfsdcld.service create mode 100644 utils/nfsdcld/Makefile.am create mode 100644 utils/nfsdcld/cld-internal.h create mode 100644 utils/nfsdcld/nfsdcld.c create mode 100644 utils/nfsdcld/nfsdcld.man create mode 100644 utils/nfsdcld/sqlite.c create mode 100644 utils/nfsdcld/sqlite.h -- 2.17.1
