From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Now that https://datatracker.ietf.org/doc/draft-ietf-nfsv4-delstid/ is mostly done with the review process, it is time to look at pushing the client implementation that we've been working on upstream. The following patch series therefore adds support for the NFSv4.2 extension to OP_OPEN to allow the client to request that the server return either an open stateid or a delegation instead of always sending the open stateid whether or not a delegation is returned. This allows us to optimise away CLOSE, and hence makes small or cached file access significantly more efficient. It also adds support for attribute delegations, which allow the client to manage the atime and mtime, and simply inform the server at file close time what the values should be. This means that most GETATTR operations to retrieve the atime/mtime values while the file is under I/O can be optimised away. Finally, we also add support for the detection mechanism that allows the client to determine whether or not the server supports the above functionality. Lance Shelton (1): NFS: Add a generic callback to return the delegation Trond Myklebust (18): NFSv4: Clean up open delegation return structure NFSv4: Refactor nfs4_opendata_check_deleg() NFSv4: Add new attribute delegation definitions NFSv4: Plumb in XDR support for the new delegation-only setattr op NFSv4: Add CB_GETATTR support for delegated attributes NFSv4: Add a flags argument to the 'have_delegation' callback NFSv4: Add support for delegated atime and mtime attributes NFSv4: Add recovery of attribute delegations NFSv4: Add a capability for delegated attributes NFSv4: Enable attribute delegations NFSv4: Delegreturn must set m/atime when they are delegated NFSv4: Fix up delegated attributes in nfs_setattr NFSv4: Don't request atime/mtime/size if they are delegated to us NFSv4: Add support for the FATTR4_OPEN_ARGUMENTS attribute NFSv4: Detect support for OPEN4_SHARE_ACCESS_WANT_OPEN_XOR_DELEGATION NFSv4: Add support for OPEN4_RESULT_NO_OPEN_STATEID NFSv4: Ask for a delegation or an open stateid in OPEN Return the delegation when deleting the sillyrenamed file fs/nfs/callback.h | 5 +- fs/nfs/callback_proc.c | 14 ++- fs/nfs/callback_xdr.c | 39 ++++++- fs/nfs/delegation.c | 59 ++++++---- fs/nfs/delegation.h | 45 +++++++- fs/nfs/dir.c | 2 +- fs/nfs/file.c | 4 +- fs/nfs/inode.c | 104 +++++++++++++++-- fs/nfs/nfs3proc.c | 10 +- fs/nfs/nfs4proc.c | 230 ++++++++++++++++++++++++++++---------- fs/nfs/nfs4xdr.c | 131 +++++++++++++++++----- fs/nfs/proc.c | 10 +- fs/nfs/read.c | 3 + fs/nfs/unlink.c | 2 + fs/nfs/write.c | 11 +- include/linux/nfs4.h | 11 ++ include/linux/nfs_fs_sb.h | 2 + include/linux/nfs_xdr.h | 45 +++++++- include/uapi/linux/nfs4.h | 4 + 19 files changed, 586 insertions(+), 145 deletions(-) -- 2.45.2
