projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 72be35fe JP |
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 | } |