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freebsd-dev/sys/fs
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Rick Macklem 6403723880 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
..
cd9660 Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
coda Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
deadfs Add function vop_rename_fail(9) that performs needed cleanup for locks 2010-04-02 14:03:01 +00:00
devfs Explicitly use curthread while manipulating td_fpop during last close 2011-12-09 17:49:34 +00:00
ext2fs Migrate ufs and ext2fs from skpc() to memcchr(). 2012-01-01 20:47:33 +00:00
fdescfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
fifofs Initialize fifoinfo fi_wgen field on open. The only important is the 2011-12-04 19:25:49 +00:00
hpfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
msdosfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
nfs Martin Cracauer reported a problem to freebsd-current@ under the 2012-01-20 00:58:51 +00:00
nfsclient If a mount -u is done to either NFS client that switches it 2012-01-25 00:22:53 +00:00
nfsserver Tai Horgan reported via email that there were two places in 2012-01-14 04:04:58 +00:00
ntfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
nullfs Subject: NULLFS: properly destroy node hash 2012-01-18 11:23:46 +00:00
nwfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
portalfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
procfs Abrogate nchr argument in proc_getargv() and proc_getenvv(): we always want 2012-01-15 18:47:24 +00:00
pseudofs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
smbfs Make sure all intermediate variables holding mount flags (mnt_flag) 2012-01-17 01:08:01 +00:00
tmpfs Return EOPNOTSUPP since we only support update mounts for NFS export. 2012-01-17 01:25:53 +00:00
udf Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
unionfs Make unionfs also clear VAPPEND when clearing VWRITE, since VAPPEND 2011-10-10 21:32:08 +00:00