mbox series

[v3,0/3] Add NFSv3 emulation of the lookupp operation

Message ID 20201020183718.14618-1-trondmy@kernel.org (mailing list archive)
Headers show
Series Add NFSv3 emulation of the lookupp operation | expand

Message

Trond Myklebust Oct. 20, 2020, 6:37 p.m. UTC 
From: Trond Myklebust <trond.myklebust@hammerspace.com>

In order to use the open-by-filehandle functionality with NFSv3, we
need to ensure that the NFS client can convert disconnected dentries
into connected ones by doing a reverse walk of the filesystem path.
To do so, NFSv4 provides the LOOKUPP operation, which does not
exist in NFSv3, but which can usually be emulated using lookup("..").

v2:
 - Fix compilation issues for "NFSv3: Refactor nfs3_proc_lookup() to
   split out the dentry"
v3:
 - Fix the string length calculation
 - Apply the NFS_MOUNT_SOFTREVAL flag in both the NFSv3 and NFSv4 lookupp

Trond Myklebust (3):
  NFSv3: Refactor nfs3_proc_lookup() to split out the dentry
  NFSv3: Add emulation of the lookupp() operation
  NFSv4: Observe the NFS_MOUNT_SOFTREVAL flag in _nfs4_proc_lookupp

 fs/nfs/nfs3proc.c | 48 ++++++++++++++++++++++++++++++++++++-----------
 fs/nfs/nfs4proc.c |  6 +++++-
 2 files changed, 42 insertions(+), 12 deletions(-)