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fs: dlm: disallow buffer size below default

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I observed that the upper layer will not send messages above this value.
As conclusion the application receive buffer should not below that
value, otherwise we are not capable to deliver the dlm message to the
upper layer. This patch forbids to set the receive buffer below the
maximum possible dlm message size.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2020-09-24 10:31:25 -04:00 committed by David Teigland
parent e1a0ec30a5
commit 4e192ee68e
1 changed files with 7 additions and 2 deletions
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9
fs/dlm/config.c
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@ -166,8 +166,14 @@ static bool dlm_check_zero(unsigned int x)
return !x;
}
#define DEFAULT_BUFFER_SIZE 4096
static bool dlm_check_buffer_size(unsigned int x)
{
return (x < DEFAULT_BUFFER_SIZE);
}
CLUSTER_ATTR(tcp_port, dlm_check_zero);
CLUSTER_ATTR(buffer_size, dlm_check_zero);
CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
CLUSTER_ATTR(recover_timer, dlm_check_zero);
CLUSTER_ATTR(toss_secs, dlm_check_zero);
@ -901,7 +907,6 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
/* Config file defaults */
#define DEFAULT_TCP_PORT 21064
#define DEFAULT_BUFFER_SIZE 4096
#define DEFAULT_RSBTBL_SIZE 1024
#define DEFAULT_RECOVER_TIMER 5
#define DEFAULT_TOSS_SECS 10