On Mon, Dec 03, 2018 at 11:30:30AM +1100, NeilBrown wrote: > This is the same series as posted on 07 November, modified slightly > to match some recent code changes upstream - nothing substantial. > > General description: > > There doesn't seem to be a maintainer for the 'cred' code, so I don't > know who to ask to approve the first 4 patches. Maybe if the NFS > team like them, they can just go to Linus with a note for him to look > at them if he wants to. For what it's worth: all my usual tests still pass with this series applied. And the nfsd (and common) parts are unlikely to conflict with anything of mine. Otherwise: sounds like a reasonable idea, but I haven't gotten a chance to review the patches in any detail. --b. > > The original motivation for this was performance. In some > circumstances the cred caches can get big and particularly can get > long chains. The hash function has been changed at least once to > improve the hashing and it still isn't perfect. > Rather than improving pruning of the cache, or resizing the hashtable > etc, it is easiest to just get rid of it. > > As well as discarding generic credentials completely (using 'struct > cred' instead), we also stop storing AUTH_UNIX credentials in a hash > table - that brings no value. Just allocate as needed and discard > when finished with. > So the only hash table will still have is for AUTH_GSS. > One of the main triggers for hashtable problems was users changing > groups a lot, so there would be many entries for the one user, each > with a different set of groups. That doesn't apply for > AUTH_GSS as the groupids on the client are ignored. > > That was the original motivation, but as I worked on it, I realized > that it was making a log of code simpler. > > 44 files changed, 550 insertions(+), 925 deletions(-) > > That is sufficient motivation in itself I think. > > Thanks, > NeilBrown > > > --- > > NeilBrown (23): > cred: add cred_fscmp() for comparing creds. > cred: add get_cred_rcu() > cred: export get_task_cred(). > cred: allow get_cred() and put_cred() to be given NULL. > SUNRPC: add 'struct cred *' to auth_cred and rpc_cred > SUNRPC: remove groupinfo from struct auth_cred. > SUNRPC: remove uid and gid from struct auth_cred > SUNRPC: remove machine_cred field from struct auth_cred > NFSv4: add cl_root_cred for use when machine cred is not available. > NFSv4: don't require lock for get_renew_cred or get_machine_cred > SUNRPC: discard RPC_DO_ROOTOVERRIDE() > NFS/SUNRPC: don't lookup machine credential until rpcauth_bindcred(). > SUNRPC: introduce RPC_TASK_NULLCREDS to request auth_none > SUNRPC: add side channel to use non-generic cred for rpc call. > NFS: move credential expiry tracking out of SUNRPC into NFS. > SUNRPC: remove RPCAUTH_AUTH_NO_CRKEY_TIMEOUT > NFS: change access cache to use 'struct cred'. > NFS: struct nfs_open_dir_context: convert rpc_cred pointer to cred. > NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'. > SUNRPC: remove generic cred code. > SUNRPC: remove crbind rpc_cred operation > SUNRPC: simplify auth_unix. > SUNRPC discard cr_uid from struct rpc_cred. > > > fs/lockd/clntproc.c | 6 - > fs/nfs/blocklayout/blocklayout.c | 2 > fs/nfs/client.c | 9 - > fs/nfs/delegation.c | 28 +-- > fs/nfs/delegation.h | 10 - > fs/nfs/dir.c | 59 ++---- > fs/nfs/flexfilelayout/flexfilelayout.c | 64 +++--- > fs/nfs/flexfilelayout/flexfilelayout.h | 8 - > fs/nfs/flexfilelayout/flexfilelayoutdev.c | 16 +- > fs/nfs/inode.c | 13 + > fs/nfs/internal.h | 8 - > fs/nfs/nfs3proc.c | 4 > fs/nfs/nfs4_fs.h | 65 +++--- > fs/nfs/nfs4client.c | 4 > fs/nfs/nfs4proc.c | 150 +++++++-------- > fs/nfs/nfs4renewd.c | 9 - > fs/nfs/nfs4session.c | 5 > fs/nfs/nfs4state.c | 129 ++++++------- > fs/nfs/pagelist.c | 2 > fs/nfs/pnfs.c | 14 + > fs/nfs/pnfs.h | 10 - > fs/nfs/pnfs_dev.c | 4 > fs/nfs/pnfs_nfs.c | 2 > fs/nfs/proc.c | 2 > fs/nfs/unlink.c | 15 - > fs/nfs/write.c | 24 ++ > fs/nfsd/nfs4callback.c | 31 +-- > fs/nfsd/state.h | 2 > include/linux/cred.h | 26 ++- > include/linux/nfs_fs.h | 13 + > include/linux/nfs_fs_sb.h | 2 > include/linux/nfs_xdr.h | 16 +- > include/linux/sunrpc/auth.h | 51 ----- > include/linux/sunrpc/clnt.h | 1 > include/linux/sunrpc/sched.h | 6 - > kernel/cred.c | 58 ++++++ > net/sunrpc/Makefile | 2 > net/sunrpc/auth.c | 116 ++++++----- > net/sunrpc/auth_generic.c | 293 ----------------------------- > net/sunrpc/auth_gss/auth_gss.c | 47 +---- > net/sunrpc/auth_null.c | 4 > net/sunrpc/auth_unix.c | 110 +++-------- > net/sunrpc/clnt.c | 26 +-- > net/sunrpc/sched.c | 5 > 44 files changed, 551 insertions(+), 920 deletions(-) > delete mode 100644 net/sunrpc/auth_generic.c > > -- > Signature
