| Jiri Pirko | 72be35f | 2013-10-18 17:43:34 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * drivers/net/bond/bond_options.c - bonding options |
| 3 | * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | */ |
| 10 | |
| 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 12 | |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/if.h> |
| 15 | #include "bonding.h" |
| 16 | |
| 17 | static bool bond_mode_is_valid(int mode) |
| 18 | { |
| 19 | int i; |
| 20 | |
| 21 | for (i = 0; bond_mode_tbl[i].modename; i++); |
| 22 | |
| 23 | return mode >= 0 && mode < i; |
| 24 | } |
| 25 | |
| 26 | int bond_option_mode_set(struct bonding *bond, int mode) |
| 27 | { |
| 28 | if (!bond_mode_is_valid(mode)) { |
| 29 | pr_err("invalid mode value %d.\n", mode); |
| 30 | return -EINVAL; |
| 31 | } |
| 32 | |
| 33 | if (bond->dev->flags & IFF_UP) { |
| 34 | pr_err("%s: unable to update mode because interface is up.\n", |
| 35 | bond->dev->name); |
| 36 | return -EPERM; |
| 37 | } |
| 38 | |
| 39 | if (bond_has_slaves(bond)) { |
| 40 | pr_err("%s: unable to update mode because bond has slaves.\n", |
| 41 | bond->dev->name); |
| 42 | return -EPERM; |
| 43 | } |
| 44 | |
| 45 | if (BOND_MODE_IS_LB(mode) && bond->params.arp_interval) { |
| 46 | pr_err("%s: %s mode is incompatible with arp monitoring.\n", |
| 47 | bond->dev->name, bond_mode_tbl[mode].modename); |
| 48 | return -EINVAL; |
| 49 | } |
| 50 | |
| 51 | /* don't cache arp_validate between modes */ |
| 52 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; |
| 53 | bond->params.mode = mode; |
| 54 | return 0; |
| 55 | } |