path: root/net
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authorRoberto Bergantinos Corpas <rbergant@redhat.com>2020-10-19 11:33:56 +0200
committerJ. Bruce Fields <bfields@redhat.com>2020-10-20 13:21:30 -0400
commit27a1e8a0f79e643d4dedb46f71e76bdee3801877 (patch)
tree3b8d524caf5d69e776899dbe73da250e9a2caebb /net
parentc327a310ec4d6ecbea13185ed56c11def441d9ab (diff)
sunrpc: raise kernel RPC channel buffer size
Its possible that using AUTH_SYS and mountd manage-gids option a user may hit the 8k RPC channel buffer limit. This have been observed on field, causing unanswered RPCs on clients after mountd fails to write on channel : rpc.mountd[11231]: auth_unix_gid: error writing reply Userland nfs-utils uses a buffer size of 32k (RPC_CHAN_BUF_SIZE), so lets match those two. Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 2990a7ab9e2a..20c93b68505e 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -909,7 +909,7 @@ static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
static ssize_t cache_slow_downcall(const char __user *buf,
size_t count, struct cache_detail *cd)
- static char write_buf[8192]; /* protected by queue_io_mutex */
+ static char write_buf[32768]; /* protected by queue_io_mutex */
ssize_t ret = -EINVAL;
if (count >= sizeof(write_buf))