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Revision 16b34aa44b257155d9392a19e08e4ce139bc2789 authored by Ronnie Sahlberg on 08 March 2019, 02:58:21 UTC, committed by Steve French on 15 March 2019, 00:32:35 UTC 
cifs: prevent starvation in wait_for_free_credits for multi-credit requests
 
Reserve the last MAX_COMPOUND credits for any request asking for >1 credit.
This is to prevent future compound requests from becoming starved while waiting
for potentially many requests is there is a large number of concurrent
singe-credit requests.

However, we need to protect from servers that are very slow to hand out
new credits on new sessions so we only do this IFF there are 2*MAX_COMPOUND
(arbitrary) credits already in flight.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
1 parent b227d21
Raw File
compat_audit.c 
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
#include <linux/types.h>
#include <asm/unistd32.h>

unsigned compat_dir_class[] = {
#include <asm-generic/audit_dir_write.h>
~0U
};

unsigned compat_read_class[] = {
#include <asm-generic/audit_read.h>
~0U
};

unsigned compat_write_class[] = {
#include <asm-generic/audit_write.h>
~0U
};

unsigned compat_chattr_class[] = {
#include <asm-generic/audit_change_attr.h>
~0U
};

unsigned compat_signal_class[] = {
#include <asm-generic/audit_signal.h>
~0U
};

int audit_classify_compat_syscall(int abi, unsigned syscall)
{
	switch (syscall) {
#ifdef __NR_open
	case __NR_open:
		return 2;
#endif
#ifdef __NR_openat
	case __NR_openat:
		return 3;
#endif
#ifdef __NR_socketcall
	case __NR_socketcall:
		return 4;
#endif
	case __NR_execve:
		return 5;
	default:
		return 1;
	}
}
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