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| author | rmacklem <rmacklem@FreeBSD.org> | 2012-01-25 00:22:53 +0000 |
|---|---|---|
| committer | rmacklem <rmacklem@FreeBSD.org> | 2012-01-25 00:22:53 +0000 |
| commit | 911de305602ff6d54ef262ead117c4a828f3e340 (patch) | |
| tree | c530b4124fc83044c9646391fafc6de00b247fc5 /usr.sbin | |
| parent | 538ff2e745ffc35d0f24d19ebc0315160097b97f (diff) | |
| download | FreeBSD-src-911de305602ff6d54ef262ead117c4a828f3e340.zip FreeBSD-src-911de305602ff6d54ef262ead117c4a828f3e340.tar.gz | |
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
Diffstat (limited to 'usr.sbin')
0 files changed, 0 insertions, 0 deletions
