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911de30560
freebsd-skq/sys/nfsclient
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rmacklem 911de30560 If a mount -u is done to either NFS client that switches it 
from TCP to UDP and the rsize/wsize/readdirsize is greater
than NFS_MAXDGRAMDATA, it is possible for a thread doing an
I/O RPC to get stuck repeatedly doing retries. This happens
because the RPC will use a resize/wsize/readdirsize that won't
work for UDP and, as such, it will keep failing indefinitely.
This patch returns an error for this case, to avoid the problem.
A discussion on freebsd-fs@ seemed to indicate that returning
an error was preferable to silently ignoring the "udp"/"mntudp"
option.
This problem was discovered while investigating a problem reported
by pjd@ via email.

MFC after:	2 weeks
2012-01-25 00:22:53 +00:00
..
nfs_bio.c Rename vm_page_set_valid() to vm_page_set_valid_range(). 2011-11-30 17:39:00 +00:00
nfs_kdtrace.c Fix the module dependency in nfs_kdtrace.c for the old NFS 2011-05-06 19:55:15 +00:00
nfs_krpc.c jwd@ reported a problem via email where the old NFS client would 2011-12-21 02:45:51 +00:00
nfs_nfsiod.c Change the sysctl naming for the old and new NFS clients 2011-05-15 20:52:43 +00:00
nfs_node.c Fix a LOR in the NFS client which could cause a deadlock. 2011-08-02 11:24:42 +00:00
nfs_subs.c Close a race in NFS lookup processing that could result in stale name cache 2012-01-20 20:02:01 +00:00
nfs_vfsops.c If a mount -u is done to either NFS client that switches it 2012-01-25 00:22:53 +00:00
nfs_vnops.c Close a race in NFS lookup processing that could result in stale name cache 2012-01-20 20:02:01 +00:00
nfs.h Fix a comment that got missed by r221973 which changed 2011-05-16 13:12:09 +00:00
nfsargs.h Implemented a mount option "nocto" that disables cache coherency 2011-05-04 13:27:45 +00:00
nfsm_subs.h Close a race in NFS lookup processing that could result in stale name cache 2012-01-20 20:02:01 +00:00
nfsmount.h Fix the nlm so that it no longer depends on the regular 2011-01-03 20:37:31 +00:00
nfsnode.h Close a race in NFS lookup processing that could result in stale name cache 2012-01-20 20:02:01 +00:00
nfsstats.h
nlminfo.h