7a6362800c
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1480 commits) bonding: enable netpoll without checking link status xfrm: Refcount destination entry on xfrm_lookup net: introduce rx_handler results and logic around that bonding: get rid of IFF_SLAVE_INACTIVE netdev->priv_flag bonding: wrap slave state work net: get rid of multiple bond-related netdevice->priv_flags bonding: register slave pointer for rx_handler be2net: Bump up the version number be2net: Copyright notice change. Update to Emulex instead of ServerEngines e1000e: fix kconfig for crc32 dependency netfilter ebtables: fix xt_AUDIT to work with ebtables xen network backend driver bonding: Improve syslog message at device creation time bonding: Call netif_carrier_off after register_netdevice bonding: Incorrect TX queue offset net_sched: fix ip_tos2prio xfrm: fix __xfrm_route_forward() be2net: Fix UDP packet detected status in RX compl Phonet: fix aligned-mode pipe socket buffer header reserve netxen: support for GbE port settings ... Fix up conflicts in drivers/staging/brcm80211/brcmsmac/wl_mac80211.c with the staging updates.
612 lines
14 KiB
C
612 lines
14 KiB
C
/*
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* 2007+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/connector.h>
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#include <linux/crypto.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/string.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include "netfs.h"
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/*
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* Global configuration list.
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* Each client can be asked to get one of them.
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*
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* Allows to provide remote server address (ipv4/v6/whatever), port
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* and so on via kernel connector.
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*/
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static struct cb_id pohmelfs_cn_id = {.idx = POHMELFS_CN_IDX, .val = POHMELFS_CN_VAL};
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static LIST_HEAD(pohmelfs_config_list);
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static DEFINE_MUTEX(pohmelfs_config_lock);
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static inline int pohmelfs_config_eql(struct pohmelfs_ctl *sc, struct pohmelfs_ctl *ctl)
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{
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if (sc->idx == ctl->idx && sc->type == ctl->type &&
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sc->proto == ctl->proto &&
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sc->addrlen == ctl->addrlen &&
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!memcmp(&sc->addr, &ctl->addr, ctl->addrlen))
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return 1;
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return 0;
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}
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static struct pohmelfs_config_group *pohmelfs_find_config_group(unsigned int idx)
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{
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struct pohmelfs_config_group *g, *group = NULL;
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list_for_each_entry(g, &pohmelfs_config_list, group_entry) {
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if (g->idx == idx) {
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group = g;
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break;
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}
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}
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return group;
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}
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static struct pohmelfs_config_group *pohmelfs_find_create_config_group(unsigned int idx)
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{
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struct pohmelfs_config_group *g;
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g = pohmelfs_find_config_group(idx);
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if (g)
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return g;
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g = kzalloc(sizeof(struct pohmelfs_config_group), GFP_KERNEL);
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if (!g)
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return NULL;
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INIT_LIST_HEAD(&g->config_list);
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g->idx = idx;
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g->num_entry = 0;
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list_add_tail(&g->group_entry, &pohmelfs_config_list);
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return g;
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}
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static inline void pohmelfs_insert_config_entry(struct pohmelfs_sb *psb, struct pohmelfs_config *dst)
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{
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struct pohmelfs_config *tmp;
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INIT_LIST_HEAD(&dst->config_entry);
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list_for_each_entry(tmp, &psb->state_list, config_entry) {
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if (dst->state.ctl.prio > tmp->state.ctl.prio)
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list_add_tail(&dst->config_entry, &tmp->config_entry);
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}
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if (list_empty(&dst->config_entry))
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list_add_tail(&dst->config_entry, &psb->state_list);
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}
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static int pohmelfs_move_config_entry(struct pohmelfs_sb *psb,
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struct pohmelfs_config *dst, struct pohmelfs_config *new)
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{
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if ((dst->state.ctl.prio == new->state.ctl.prio) &&
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(dst->state.ctl.perm == new->state.ctl.perm))
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return 0;
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dprintk("%s: dst: prio: %d, perm: %x, new: prio: %d, perm: %d.\n",
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__func__, dst->state.ctl.prio, dst->state.ctl.perm,
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new->state.ctl.prio, new->state.ctl.perm);
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dst->state.ctl.prio = new->state.ctl.prio;
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dst->state.ctl.perm = new->state.ctl.perm;
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list_del_init(&dst->config_entry);
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pohmelfs_insert_config_entry(psb, dst);
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return 0;
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}
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/*
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* pohmelfs_copy_config() is used to copy new state configs from the
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* config group (controlled by the netlink messages) into the superblock.
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* This happens either at startup time where no transactions can access
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* the list of the configs (and thus list of the network states), or at
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* run-time, where it is protected by the psb->state_lock.
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*/
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int pohmelfs_copy_config(struct pohmelfs_sb *psb)
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{
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struct pohmelfs_config_group *g;
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struct pohmelfs_config *c, *dst;
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int err = -ENODEV;
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mutex_lock(&pohmelfs_config_lock);
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g = pohmelfs_find_config_group(psb->idx);
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if (!g)
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goto out_unlock;
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/*
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* Run over all entries in given config group and try to create and
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* initialize those, which do not exist in superblock list.
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* Skip all existing entries.
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*/
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list_for_each_entry(c, &g->config_list, config_entry) {
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err = 0;
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list_for_each_entry(dst, &psb->state_list, config_entry) {
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if (pohmelfs_config_eql(&dst->state.ctl, &c->state.ctl)) {
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err = pohmelfs_move_config_entry(psb, dst, c);
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if (!err)
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err = -EEXIST;
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break;
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}
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}
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if (err)
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continue;
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dst = kzalloc(sizeof(struct pohmelfs_config), GFP_KERNEL);
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if (!dst) {
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err = -ENOMEM;
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break;
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}
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memcpy(&dst->state.ctl, &c->state.ctl, sizeof(struct pohmelfs_ctl));
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pohmelfs_insert_config_entry(psb, dst);
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err = pohmelfs_state_init_one(psb, dst);
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if (err) {
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list_del(&dst->config_entry);
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kfree(dst);
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}
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err = 0;
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}
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out_unlock:
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mutex_unlock(&pohmelfs_config_lock);
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return err;
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}
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int pohmelfs_copy_crypto(struct pohmelfs_sb *psb)
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{
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struct pohmelfs_config_group *g;
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int err = -ENOENT;
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mutex_lock(&pohmelfs_config_lock);
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g = pohmelfs_find_config_group(psb->idx);
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if (!g)
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goto err_out_exit;
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if (g->hash_string) {
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err = -ENOMEM;
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psb->hash_string = kstrdup(g->hash_string, GFP_KERNEL);
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if (!psb->hash_string)
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goto err_out_exit;
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psb->hash_strlen = g->hash_strlen;
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}
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if (g->cipher_string) {
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psb->cipher_string = kstrdup(g->cipher_string, GFP_KERNEL);
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if (!psb->cipher_string)
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goto err_out_free_hash_string;
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psb->cipher_strlen = g->cipher_strlen;
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}
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if (g->hash_keysize) {
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psb->hash_key = kmemdup(g->hash_key, g->hash_keysize,
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GFP_KERNEL);
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if (!psb->hash_key)
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goto err_out_free_cipher_string;
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psb->hash_keysize = g->hash_keysize;
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}
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if (g->cipher_keysize) {
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psb->cipher_key = kmemdup(g->cipher_key, g->cipher_keysize,
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GFP_KERNEL);
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if (!psb->cipher_key)
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goto err_out_free_hash;
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psb->cipher_keysize = g->cipher_keysize;
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}
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mutex_unlock(&pohmelfs_config_lock);
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return 0;
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err_out_free_hash:
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kfree(psb->hash_key);
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err_out_free_cipher_string:
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kfree(psb->cipher_string);
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err_out_free_hash_string:
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kfree(psb->hash_string);
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err_out_exit:
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mutex_unlock(&pohmelfs_config_lock);
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return err;
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}
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static int pohmelfs_send_reply(int err, int msg_num, int action, struct cn_msg *msg, struct pohmelfs_ctl *ctl)
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{
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struct pohmelfs_cn_ack *ack;
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ack = kzalloc(sizeof(struct pohmelfs_cn_ack), GFP_KERNEL);
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if (!ack)
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return -ENOMEM;
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memcpy(&ack->msg, msg, sizeof(struct cn_msg));
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if (action == POHMELFS_CTLINFO_ACK)
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memcpy(&ack->ctl, ctl, sizeof(struct pohmelfs_ctl));
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ack->msg.len = sizeof(struct pohmelfs_cn_ack) - sizeof(struct cn_msg);
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ack->msg.ack = msg->ack + 1;
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ack->error = err;
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ack->msg_num = msg_num;
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cn_netlink_send(&ack->msg, 0, GFP_KERNEL);
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kfree(ack);
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return 0;
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}
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static int pohmelfs_cn_disp(struct cn_msg *msg)
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{
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struct pohmelfs_config_group *g;
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struct pohmelfs_ctl *ctl = (struct pohmelfs_ctl *)msg->data;
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struct pohmelfs_config *c, *tmp;
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int err = 0, i = 1;
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if (msg->len != sizeof(struct pohmelfs_ctl))
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return -EBADMSG;
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mutex_lock(&pohmelfs_config_lock);
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g = pohmelfs_find_config_group(ctl->idx);
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if (!g) {
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pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL);
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goto out_unlock;
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}
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list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) {
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struct pohmelfs_ctl *sc = &c->state.ctl;
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if (pohmelfs_send_reply(err, g->num_entry - i, POHMELFS_CTLINFO_ACK, msg, sc)) {
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err = -ENOMEM;
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goto out_unlock;
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}
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i += 1;
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}
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out_unlock:
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mutex_unlock(&pohmelfs_config_lock);
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return err;
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}
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static int pohmelfs_cn_dump(struct cn_msg *msg)
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{
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struct pohmelfs_config_group *g;
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struct pohmelfs_config *c, *tmp;
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int err = 0, i = 1;
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int total_msg = 0;
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if (msg->len != sizeof(struct pohmelfs_ctl))
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return -EBADMSG;
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mutex_lock(&pohmelfs_config_lock);
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list_for_each_entry(g, &pohmelfs_config_list, group_entry)
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total_msg += g->num_entry;
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if (total_msg == 0) {
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if (pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL))
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err = -ENOMEM;
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goto out_unlock;
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}
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list_for_each_entry(g, &pohmelfs_config_list, group_entry) {
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list_for_each_entry_safe(c, tmp, &g->config_list,
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config_entry) {
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struct pohmelfs_ctl *sc = &c->state.ctl;
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if (pohmelfs_send_reply(err, total_msg - i,
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POHMELFS_CTLINFO_ACK, msg,
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sc)) {
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err = -ENOMEM;
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goto out_unlock;
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}
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i += 1;
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}
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}
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out_unlock:
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mutex_unlock(&pohmelfs_config_lock);
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return err;
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}
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static int pohmelfs_cn_flush(struct cn_msg *msg)
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{
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struct pohmelfs_config_group *g;
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struct pohmelfs_ctl *ctl = (struct pohmelfs_ctl *)msg->data;
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struct pohmelfs_config *c, *tmp;
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int err = 0;
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if (msg->len != sizeof(struct pohmelfs_ctl))
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return -EBADMSG;
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mutex_lock(&pohmelfs_config_lock);
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if (ctl->idx != POHMELFS_NULL_IDX) {
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g = pohmelfs_find_config_group(ctl->idx);
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if (!g)
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goto out_unlock;
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list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) {
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list_del(&c->config_entry);
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g->num_entry--;
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kfree(c);
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}
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} else {
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list_for_each_entry(g, &pohmelfs_config_list, group_entry) {
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list_for_each_entry_safe(c, tmp, &g->config_list,
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config_entry) {
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list_del(&c->config_entry);
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g->num_entry--;
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kfree(c);
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}
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}
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}
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out_unlock:
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mutex_unlock(&pohmelfs_config_lock);
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pohmelfs_cn_dump(msg);
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return err;
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}
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static int pohmelfs_modify_config(struct pohmelfs_ctl *old, struct pohmelfs_ctl *new)
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{
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old->perm = new->perm;
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old->prio = new->prio;
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return 0;
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}
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static int pohmelfs_cn_ctl(struct cn_msg *msg, int action)
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{
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struct pohmelfs_config_group *g;
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struct pohmelfs_ctl *ctl = (struct pohmelfs_ctl *)msg->data;
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struct pohmelfs_config *c, *tmp;
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int err = 0;
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if (msg->len != sizeof(struct pohmelfs_ctl))
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return -EBADMSG;
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mutex_lock(&pohmelfs_config_lock);
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g = pohmelfs_find_create_config_group(ctl->idx);
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if (!g) {
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err = -ENOMEM;
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goto out_unlock;
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}
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list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) {
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struct pohmelfs_ctl *sc = &c->state.ctl;
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if (pohmelfs_config_eql(sc, ctl)) {
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if (action == POHMELFS_FLAGS_ADD) {
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err = -EEXIST;
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goto out_unlock;
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} else if (action == POHMELFS_FLAGS_DEL) {
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list_del(&c->config_entry);
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g->num_entry--;
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kfree(c);
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goto out_unlock;
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} else if (action == POHMELFS_FLAGS_MODIFY) {
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err = pohmelfs_modify_config(sc, ctl);
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goto out_unlock;
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} else {
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err = -EEXIST;
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goto out_unlock;
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}
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}
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}
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if (action == POHMELFS_FLAGS_DEL) {
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err = -EBADMSG;
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goto out_unlock;
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}
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c = kzalloc(sizeof(struct pohmelfs_config), GFP_KERNEL);
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if (!c) {
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err = -ENOMEM;
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goto out_unlock;
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}
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memcpy(&c->state.ctl, ctl, sizeof(struct pohmelfs_ctl));
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g->num_entry++;
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list_add_tail(&c->config_entry, &g->config_list);
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out_unlock:
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mutex_unlock(&pohmelfs_config_lock);
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if (pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL))
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err = -ENOMEM;
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return err;
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}
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static int pohmelfs_crypto_hash_init(struct pohmelfs_config_group *g, struct pohmelfs_crypto *c)
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{
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char *algo = (char *)c->data;
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u8 *key = (u8 *)(algo + c->strlen);
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if (g->hash_string)
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return -EEXIST;
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g->hash_string = kstrdup(algo, GFP_KERNEL);
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if (!g->hash_string)
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return -ENOMEM;
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g->hash_strlen = c->strlen;
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g->hash_keysize = c->keysize;
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g->hash_key = kmemdup(key, c->keysize, GFP_KERNEL);
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if (!g->hash_key) {
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kfree(g->hash_string);
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return -ENOMEM;
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}
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return 0;
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}
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static int pohmelfs_crypto_cipher_init(struct pohmelfs_config_group *g, struct pohmelfs_crypto *c)
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{
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char *algo = (char *)c->data;
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u8 *key = (u8 *)(algo + c->strlen);
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if (g->cipher_string)
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return -EEXIST;
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g->cipher_string = kstrdup(algo, GFP_KERNEL);
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if (!g->cipher_string)
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return -ENOMEM;
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g->cipher_strlen = c->strlen;
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g->cipher_keysize = c->keysize;
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g->cipher_key = kmemdup(key, c->keysize, GFP_KERNEL);
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if (!g->cipher_key) {
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kfree(g->cipher_string);
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return -ENOMEM;
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}
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return 0;
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}
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static int pohmelfs_cn_crypto(struct cn_msg *msg)
|
|
{
|
|
struct pohmelfs_crypto *crypto = (struct pohmelfs_crypto *)msg->data;
|
|
struct pohmelfs_config_group *g;
|
|
int err = 0;
|
|
|
|
dprintk("%s: idx: %u, strlen: %u, type: %u, keysize: %u, algo: %s.\n",
|
|
__func__, crypto->idx, crypto->strlen, crypto->type,
|
|
crypto->keysize, (char *)crypto->data);
|
|
|
|
mutex_lock(&pohmelfs_config_lock);
|
|
g = pohmelfs_find_create_config_group(crypto->idx);
|
|
if (!g) {
|
|
err = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
switch (crypto->type) {
|
|
case POHMELFS_CRYPTO_HASH:
|
|
err = pohmelfs_crypto_hash_init(g, crypto);
|
|
break;
|
|
case POHMELFS_CRYPTO_CIPHER:
|
|
err = pohmelfs_crypto_cipher_init(g, crypto);
|
|
break;
|
|
default:
|
|
err = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
out_unlock:
|
|
mutex_unlock(&pohmelfs_config_lock);
|
|
if (pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL))
|
|
err = -ENOMEM;
|
|
|
|
return err;
|
|
}
|
|
|
|
static void pohmelfs_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
|
|
{
|
|
int err;
|
|
|
|
if (!cap_raised(current_cap(), CAP_SYS_ADMIN))
|
|
return;
|
|
|
|
switch (msg->flags) {
|
|
case POHMELFS_FLAGS_ADD:
|
|
case POHMELFS_FLAGS_DEL:
|
|
case POHMELFS_FLAGS_MODIFY:
|
|
err = pohmelfs_cn_ctl(msg, msg->flags);
|
|
break;
|
|
case POHMELFS_FLAGS_FLUSH:
|
|
err = pohmelfs_cn_flush(msg);
|
|
break;
|
|
case POHMELFS_FLAGS_SHOW:
|
|
err = pohmelfs_cn_disp(msg);
|
|
break;
|
|
case POHMELFS_FLAGS_DUMP:
|
|
err = pohmelfs_cn_dump(msg);
|
|
break;
|
|
case POHMELFS_FLAGS_CRYPTO:
|
|
err = pohmelfs_cn_crypto(msg);
|
|
break;
|
|
default:
|
|
err = -ENOSYS;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int pohmelfs_config_check(struct pohmelfs_config *config, int idx)
|
|
{
|
|
struct pohmelfs_ctl *ctl = &config->state.ctl;
|
|
struct pohmelfs_config *tmp;
|
|
int err = -ENOENT;
|
|
struct pohmelfs_ctl *sc;
|
|
struct pohmelfs_config_group *g;
|
|
|
|
mutex_lock(&pohmelfs_config_lock);
|
|
|
|
g = pohmelfs_find_config_group(ctl->idx);
|
|
if (g) {
|
|
list_for_each_entry(tmp, &g->config_list, config_entry) {
|
|
sc = &tmp->state.ctl;
|
|
|
|
if (pohmelfs_config_eql(sc, ctl)) {
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&pohmelfs_config_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __init pohmelfs_config_init(void)
|
|
{
|
|
/* XXX remove (void *) cast when vanilla connector got synced */
|
|
return cn_add_callback(&pohmelfs_cn_id, "pohmelfs", (void *)pohmelfs_cn_callback);
|
|
}
|
|
|
|
void pohmelfs_config_exit(void)
|
|
{
|
|
struct pohmelfs_config *c, *tmp;
|
|
struct pohmelfs_config_group *g, *gtmp;
|
|
|
|
cn_del_callback(&pohmelfs_cn_id);
|
|
|
|
mutex_lock(&pohmelfs_config_lock);
|
|
list_for_each_entry_safe(g, gtmp, &pohmelfs_config_list, group_entry) {
|
|
list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) {
|
|
list_del(&c->config_entry);
|
|
kfree(c);
|
|
}
|
|
|
|
list_del(&g->group_entry);
|
|
|
|
kfree(g->hash_string);
|
|
|
|
kfree(g->cipher_string);
|
|
|
|
kfree(g);
|
|
}
|
|
mutex_unlock(&pohmelfs_config_lock);
|
|
}
|