linux_dsm_epyc7002/fs/nfs
Ricardo Labiaga a43cde94fe nfs41: Implement NFSv4.1 callback service process.
nfs41_callback_up() initializes the necessary queues and creates the new
nfs41_callback_svc thread.  This thread executes the callback service which
waits for requests to arrive on the svc_serv->sv_cb_list.

NFS41_BC_MIN_CALLBACKS is set to 1 because we expect callbacks to not
cause substantial latency.

The actual processing of the callback will be implemented as a separate patch.

There is only one NFSv4.1 callback service.  The first caller of
nfs4_callback_up() creates the service, subsequent callers increment a
reference count on the service.  The service is destroyed when the last
caller invokes nfs_callback_down().

The transport needs to hold a reference to the callback service in order
to invoke it during callback processing.  Currently this reference is only
obtained when the service is first created.  This is incorrect, since
subsequent registrations for other transports will leave the xprt->serv
pointer uninitialized, leading to an oops when a callback arrives on
the "unreferenced" transport.

This patch fixes the problem by ensuring that a reference to the service
is saved in xprt->serv, either because the service is created by this
invocation to nfs4_callback_up() or by a prior invocation.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: Add a reference to svc_serv during callback service bring up]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[Type check arguments of nfs_callback_up]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: save svc_serv in nfs_callback_info]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[Removal of ugly #ifdefs]
[nfs41: Update to removal of ugly #ifdefs]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17 14:11:29 -07:00
..
callback_proc.c nfs: replace remaining __FUNCTION__ occurrences 2008-05-16 09:43:29 -07:00
callback_xdr.c nfs: replace remaining __FUNCTION__ occurrences 2008-05-16 09:43:29 -07:00
callback.c nfs41: Implement NFSv4.1 callback service process. 2009-06-17 14:11:29 -07:00
callback.h nfs41: Implement NFSv4.1 callback service process. 2009-06-17 14:11:29 -07:00
client.c nfs41: minorversion support for nfs4_{init,destroy}_callback 2009-06-17 13:06:01 -07:00
delegation.c NFSv4: Convert delegation->type field to fmode_t 2008-12-23 15:21:53 -05:00
delegation.h NFSv4: Convert delegation->type field to fmode_t 2008-12-23 15:21:53 -05:00
dir.c nfs: Fix NFS v4 client handling of MAY_EXEC in nfs_permission. 2009-05-18 20:11:12 -07:00
direct.c nfs41 commit sequence setup done support 2009-06-17 10:46:50 -07:00
file.c NFS: Close page_mkwrite() races 2009-05-02 19:42:39 -07:00
fscache-index.c NFS: Add read context retention for FS-Cache to call back with 2009-04-03 16:42:44 +01:00
fscache.c NFS: Store pages from an NFS inode into a local cache 2009-04-03 16:42:45 +01:00
fscache.h NFS: Display local caching state 2009-04-03 16:42:47 +01:00
getroot.c NFS: Fix the type of struct nfs_fattr->mode 2009-03-11 14:10:26 -04:00
idmap.c nfs: fix sparse warnings 2008-02-20 16:15:44 -05:00
inode.c NFS: Use local disk inode cache 2009-04-03 16:42:43 +01:00
internal.h nfs41: recover lease in _nfs4_lookup_root 2009-06-17 12:25:13 -07:00
iostat.h NFS: Add some new I/O counters for FS-Cache doing things for NFS 2009-04-03 16:42:43 +01:00
Kconfig nfs41: Add Kconfig symbols for NFSv4.1 2009-06-17 10:46:13 -07:00
Makefile NFS: Define and create server-level objects 2009-04-03 16:42:42 +01:00
mount_clnt.c NFS: "[no]resvport" mount option changes mountd client too 2008-12-23 15:21:37 -05:00
namespace.c nfs: BUG_ON in nfs_follow_mountpoint 2008-10-07 18:15:16 -04:00
nfs2xdr.c NFS: Fix the type of struct nfs_fattr->mode 2009-03-11 14:10:26 -04:00
nfs3acl.c NFSv3: Fix posix ACL code 2009-03-10 20:33:18 -04:00
nfs3proc.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-04-02 21:09:10 -07:00
nfs3xdr.c NFS: Fix the XDR iovec calculation in nfs3_xdr_setaclargs 2009-04-21 07:46:49 -07:00
nfs4_fs.h nfs41: get_clid_cred for EXCHANGE_ID 2009-06-17 12:25:13 -07:00
nfs4namespace.c NFS: Fix misparsing of nfsv4 fs_locations attribute (take 2) 2009-03-10 20:33:17 -04:00
nfs4proc.c nfs41: increment_{open,lock}_seqid 2009-06-17 12:43:45 -07:00
nfs4renewd.c nfs41: introduce get_state_renewal_cred 2009-06-17 12:25:11 -07:00
nfs4state.c nfs41: increment_{open,lock}_seqid 2009-06-17 12:43:45 -07:00
nfs4xdr.c nfs41: sequence operation 2009-06-17 12:25:04 -07:00
nfsroot.c nfs: fix build error in nfsroot with initconst 2009-05-26 14:51:00 -04:00
pagelist.c NFS: Throttle page dirtying while we're flushing to disk 2009-03-11 14:10:30 -04:00
proc.c NFS: Optimise NFS close() 2009-03-19 15:35:50 -04:00
read.c nfs41: use rpc prepare call state for session reset 2009-06-17 12:25:07 -07:00
super.c nfs41: destroy_session operation 2009-06-17 12:24:55 -07:00
symlink.c nfs: remove unnecessary NFS_NEED_* defines 2008-04-23 16:13:37 -04:00
sysctl.c [PATCH] nfs: fix congestion control 2007-03-16 19:25:05 -07:00
unlink.c nfs41: use rpc prepare call state for session reset 2009-06-17 12:25:07 -07:00
write.c nfs41: use rpc prepare call state for session reset 2009-06-17 12:25:07 -07:00