kernel.git/fs/nfs/flexfilelayout/flexfilelayout.c, branch linux-5.0.y

NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.

2018-12-19T18:52:46Z

SUNRPC has two sorts of credentials, both of which appear as "struct rpc_cred". There are "generic credentials" which are supplied by clients such as NFS and passed in 'struct rpc_message' to indicate which user should be used to authorize the request, and there are low-level credentials such as AUTH_NULL, AUTH_UNIX, AUTH_GSS which describe the credential to be sent over the wires. This patch replaces all the generic credentials by 'struct cred' pointers - the credential structure used throughout Linux. For machine credentials, there is a special 'struct cred *' pointer which is statically allocated and recognized where needed as having a special meaning. A look-up of a low-level cred will map this to a machine credential. Signed-off-by: NeilBrown Acked-by: J. Bruce Fields Signed-off-by: Anna Schumaker

SUNRPC: remove uid and gid from struct auth_cred

2018-12-19T18:52:45Z

Use cred->fsuid and cred->fsgid instead. Signed-off-by: NeilBrown Signed-off-by: Anna Schumaker

SUNRPC: remove groupinfo from struct auth_cred.

2018-12-19T18:52:45Z

We can use cred->groupinfo (from the 'struct cred') instead. Signed-off-by: NeilBrown Signed-off-by: Anna Schumaker

SUNRPC: add 'struct cred *' to auth_cred and rpc_cred

2018-12-19T18:52:44Z

The SUNRPC credential framework was put together before Linux has 'struct cred'. Now that we have it, it makes sense to use it. This first step just includes a suitable 'struct cred *' pointer in every 'struct auth_cred' and almost every 'struct rpc_cred'. The rpc_cred used for auth_null has a NULL 'struct cred *' as nothing else really makes sense. For rpc_cred, the pointer is reference counted. For auth_cred it isn't. struct auth_cred are either allocated on the stack, in which case the thread owns a reference to the auth, or are part of 'struct generic_cred' in which case gc_base owns the reference, and "acred" shares it. Signed-off-by: NeilBrown Signed-off-by: Anna Schumaker

flexfiles: enforce per-mirror stateid only for v4 DSes

2018-12-02T14:43:56Z

Since commit bb21ce0ad227 we always enforce per-mirror stateid. However, this makes sense only for v4+ servers. Signed-off-by: Tigran Mkrtchyan Signed-off-by: Trond Myklebust

flexfiles: use per-mirror specified stateid for IO

2018-11-22T19:04:55Z

rfc8435 says: For tight coupling, ffds_stateid provides the stateid to be used by the client to access the file. However current implementation replaces per-mirror provided stateid with by open or lock stateid. Ensure that per-mirror stateid is used by ff_layout_write_prepare_v4 and nfs4_ff_layout_prepare_ds. Signed-off-by: Tigran Mkrtchyan Signed-off-by: Rick Macklem Signed-off-by: Trond Myklebust

pNFS: Don't allocate more pages than we need to fit a layoutget response

2018-09-30T19:35:16Z

For the 'files' and 'flexfiles' layout types, we do not expect the reply to be any larger than 4k. The block and scsi layout types are a little more greedy, so we keep allocating the maximum response size for now. Signed-off-by: Trond Myklebust

pNFS/flexfiles: ff_layout_pg_init_read should exit on error

2018-08-21T17:39:05Z

If we get an error while retrieving the layout, then we should report it rather than falling back to I/O through the MDS. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

pNFS/flexfiles: Ensure we always return a layout if it has layoutstats

2018-07-26T20:25:25Z

If a layout segment is carrying layoutstats or layout error information, then we always want to return it rather than using a forgetful model. Signed-off-by: Trond Myklebust

Merge tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

2018-06-21T21:21:34Z

Pull NFS client bugfixes from Trond Myklebust: "Hightlights include: - fix an rcu deadlock in nfs_delegation_find_inode() - fix NFSv4 deadlocks due to not freeing the session slot in layoutget - don't send layoutreturn if the layout is already invalid - prevent duplicate XID allocation - flexfiles: Don't tie up all the rpciod threads in resends" * tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: pNFS/flexfiles: Process writeback resends from nfsiod context as well pNFS/flexfiles: Don't tie up all the rpciod threads in resends sunrpc: Prevent duplicate XID allocation pNFS: Don't send layoutreturn if the layout is already invalid pNFS: Always free the session slot on error in nfs4_layoutget_handle_exception NFS: Fix an rcu deadlock in nfs_delegation_find_inode()