mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
691 lines
18 KiB
691 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Witness Service client for CIFS |
|
* |
|
* Copyright (c) 2020 Samuel Cabrero <[email protected]> |
|
*/ |
|
|
|
#include <linux/kref.h> |
|
#include <net/genetlink.h> |
|
#include <uapi/linux/cifs/cifs_netlink.h> |
|
|
|
#include "cifs_swn.h" |
|
#include "cifsglob.h" |
|
#include "cifsproto.h" |
|
#include "fscache.h" |
|
#include "cifs_debug.h" |
|
#include "netlink.h" |
|
|
|
static DEFINE_IDR(cifs_swnreg_idr); |
|
static DEFINE_MUTEX(cifs_swnreg_idr_mutex); |
|
|
|
struct cifs_swn_reg { |
|
int id; |
|
struct kref ref_count; |
|
|
|
const char *net_name; |
|
const char *share_name; |
|
bool net_name_notify; |
|
bool share_name_notify; |
|
bool ip_notify; |
|
|
|
struct cifs_tcon *tcon; |
|
}; |
|
|
|
static int cifs_swn_auth_info_krb(struct cifs_tcon *tcon, struct sk_buff *skb) |
|
{ |
|
int ret; |
|
|
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_KRB_AUTH); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int cifs_swn_auth_info_ntlm(struct cifs_tcon *tcon, struct sk_buff *skb) |
|
{ |
|
int ret; |
|
|
|
if (tcon->ses->user_name != NULL) { |
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_USER_NAME, tcon->ses->user_name); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
if (tcon->ses->password != NULL) { |
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_PASSWORD, tcon->ses->password); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
if (tcon->ses->domainName != NULL) { |
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_DOMAIN_NAME, tcon->ses->domainName); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Sends a register message to the userspace daemon based on the registration. |
|
* The authentication information to connect to the witness service is bundled |
|
* into the message. |
|
*/ |
|
static int cifs_swn_send_register_message(struct cifs_swn_reg *swnreg) |
|
{ |
|
struct sk_buff *skb; |
|
struct genlmsghdr *hdr; |
|
enum securityEnum authtype; |
|
struct sockaddr_storage *addr; |
|
int ret; |
|
|
|
skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (skb == NULL) { |
|
ret = -ENOMEM; |
|
goto fail; |
|
} |
|
|
|
hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_REGISTER); |
|
if (hdr == NULL) { |
|
ret = -ENOMEM; |
|
goto nlmsg_fail; |
|
} |
|
|
|
ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
/* |
|
* If there is an address stored use it instead of the server address, because we are |
|
* in the process of reconnecting to it after a share has been moved or we have been |
|
* told to switch to it (client move message). In these cases we unregister from the |
|
* server address and register to the new address when we receive the notification. |
|
*/ |
|
if (swnreg->tcon->ses->server->use_swn_dstaddr) |
|
addr = &swnreg->tcon->ses->server->swn_dstaddr; |
|
else |
|
addr = &swnreg->tcon->ses->server->dstaddr; |
|
|
|
ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage), addr); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
if (swnreg->net_name_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
if (swnreg->share_name_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
if (swnreg->ip_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
authtype = cifs_select_sectype(swnreg->tcon->ses->server, swnreg->tcon->ses->sectype); |
|
switch (authtype) { |
|
case Kerberos: |
|
ret = cifs_swn_auth_info_krb(swnreg->tcon, skb); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: Failed to get kerberos auth info: %d\n", __func__, ret); |
|
goto nlmsg_fail; |
|
} |
|
break; |
|
case LANMAN: |
|
case NTLM: |
|
case NTLMv2: |
|
case RawNTLMSSP: |
|
ret = cifs_swn_auth_info_ntlm(swnreg->tcon, skb); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: Failed to get NTLM auth info: %d\n", __func__, ret); |
|
goto nlmsg_fail; |
|
} |
|
break; |
|
default: |
|
cifs_dbg(VFS, "%s: secType %d not supported!\n", __func__, authtype); |
|
ret = -EINVAL; |
|
goto nlmsg_fail; |
|
} |
|
|
|
genlmsg_end(skb, hdr); |
|
genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC); |
|
|
|
cifs_dbg(FYI, "%s: Message to register for network name %s with id %d sent\n", __func__, |
|
swnreg->net_name, swnreg->id); |
|
|
|
return 0; |
|
|
|
nlmsg_fail: |
|
genlmsg_cancel(skb, hdr); |
|
nlmsg_free(skb); |
|
fail: |
|
return ret; |
|
} |
|
|
|
/* |
|
* Sends an uregister message to the userspace daemon based on the registration |
|
*/ |
|
static int cifs_swn_send_unregister_message(struct cifs_swn_reg *swnreg) |
|
{ |
|
struct sk_buff *skb; |
|
struct genlmsghdr *hdr; |
|
int ret; |
|
|
|
skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (skb == NULL) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_UNREGISTER); |
|
if (hdr == NULL) { |
|
ret = -ENOMEM; |
|
goto nlmsg_fail; |
|
} |
|
|
|
ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage), |
|
&swnreg->tcon->ses->server->dstaddr); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
|
|
if (swnreg->net_name_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
if (swnreg->share_name_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
if (swnreg->ip_notify) { |
|
ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY); |
|
if (ret < 0) |
|
goto nlmsg_fail; |
|
} |
|
|
|
genlmsg_end(skb, hdr); |
|
genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC); |
|
|
|
cifs_dbg(FYI, "%s: Message to unregister for network name %s with id %d sent\n", __func__, |
|
swnreg->net_name, swnreg->id); |
|
|
|
return 0; |
|
|
|
nlmsg_fail: |
|
genlmsg_cancel(skb, hdr); |
|
nlmsg_free(skb); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Try to find a matching registration for the tcon's server name and share name. |
|
* Calls to this function must be protected by cifs_swnreg_idr_mutex. |
|
* TODO Try to avoid memory allocations |
|
*/ |
|
static struct cifs_swn_reg *cifs_find_swn_reg(struct cifs_tcon *tcon) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
int id; |
|
const char *share_name; |
|
const char *net_name; |
|
|
|
net_name = extract_hostname(tcon->treeName); |
|
if (IS_ERR(net_name)) { |
|
int ret; |
|
|
|
ret = PTR_ERR(net_name); |
|
cifs_dbg(VFS, "%s: failed to extract host name from target '%s': %d\n", |
|
__func__, tcon->treeName, ret); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
share_name = extract_sharename(tcon->treeName); |
|
if (IS_ERR(share_name)) { |
|
int ret; |
|
|
|
ret = PTR_ERR(share_name); |
|
cifs_dbg(VFS, "%s: failed to extract share name from target '%s': %d\n", |
|
__func__, tcon->treeName, ret); |
|
kfree(net_name); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) { |
|
if (strcasecmp(swnreg->net_name, net_name) != 0 |
|
|| strcasecmp(swnreg->share_name, share_name) != 0) { |
|
continue; |
|
} |
|
|
|
cifs_dbg(FYI, "Existing swn registration for %s:%s found\n", swnreg->net_name, |
|
swnreg->share_name); |
|
|
|
kfree(net_name); |
|
kfree(share_name); |
|
|
|
return swnreg; |
|
} |
|
|
|
kfree(net_name); |
|
kfree(share_name); |
|
|
|
return ERR_PTR(-EEXIST); |
|
} |
|
|
|
/* |
|
* Get a registration for the tcon's server and share name, allocating a new one if it does not |
|
* exists |
|
*/ |
|
static struct cifs_swn_reg *cifs_get_swn_reg(struct cifs_tcon *tcon) |
|
{ |
|
struct cifs_swn_reg *reg = NULL; |
|
int ret; |
|
|
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
|
|
/* Check if we are already registered for this network and share names */ |
|
reg = cifs_find_swn_reg(tcon); |
|
if (!IS_ERR(reg)) { |
|
kref_get(®->ref_count); |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
return reg; |
|
} else if (PTR_ERR(reg) != -EEXIST) { |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
return reg; |
|
} |
|
|
|
reg = kmalloc(sizeof(struct cifs_swn_reg), GFP_ATOMIC); |
|
if (reg == NULL) { |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
kref_init(®->ref_count); |
|
|
|
reg->id = idr_alloc(&cifs_swnreg_idr, reg, 1, 0, GFP_ATOMIC); |
|
if (reg->id < 0) { |
|
cifs_dbg(FYI, "%s: failed to allocate registration id\n", __func__); |
|
ret = reg->id; |
|
goto fail; |
|
} |
|
|
|
reg->net_name = extract_hostname(tcon->treeName); |
|
if (IS_ERR(reg->net_name)) { |
|
ret = PTR_ERR(reg->net_name); |
|
cifs_dbg(VFS, "%s: failed to extract host name from target: %d\n", __func__, ret); |
|
goto fail_idr; |
|
} |
|
|
|
reg->share_name = extract_sharename(tcon->treeName); |
|
if (IS_ERR(reg->share_name)) { |
|
ret = PTR_ERR(reg->share_name); |
|
cifs_dbg(VFS, "%s: failed to extract share name from target: %d\n", __func__, ret); |
|
goto fail_net_name; |
|
} |
|
|
|
reg->net_name_notify = true; |
|
reg->share_name_notify = true; |
|
reg->ip_notify = (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT); |
|
|
|
reg->tcon = tcon; |
|
|
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
|
|
return reg; |
|
|
|
fail_net_name: |
|
kfree(reg->net_name); |
|
fail_idr: |
|
idr_remove(&cifs_swnreg_idr, reg->id); |
|
fail: |
|
kfree(reg); |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
static void cifs_swn_reg_release(struct kref *ref) |
|
{ |
|
struct cifs_swn_reg *swnreg = container_of(ref, struct cifs_swn_reg, ref_count); |
|
int ret; |
|
|
|
ret = cifs_swn_send_unregister_message(swnreg); |
|
if (ret < 0) |
|
cifs_dbg(VFS, "%s: Failed to send unregister message: %d\n", __func__, ret); |
|
|
|
idr_remove(&cifs_swnreg_idr, swnreg->id); |
|
kfree(swnreg->net_name); |
|
kfree(swnreg->share_name); |
|
kfree(swnreg); |
|
} |
|
|
|
static void cifs_put_swn_reg(struct cifs_swn_reg *swnreg) |
|
{ |
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
kref_put(&swnreg->ref_count, cifs_swn_reg_release); |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
} |
|
|
|
static int cifs_swn_resource_state_changed(struct cifs_swn_reg *swnreg, const char *name, int state) |
|
{ |
|
int i; |
|
|
|
switch (state) { |
|
case CIFS_SWN_RESOURCE_STATE_UNAVAILABLE: |
|
cifs_dbg(FYI, "%s: resource name '%s' become unavailable\n", __func__, name); |
|
for (i = 0; i < swnreg->tcon->ses->chan_count; i++) { |
|
spin_lock(&GlobalMid_Lock); |
|
if (swnreg->tcon->ses->chans[i].server->tcpStatus != CifsExiting) |
|
swnreg->tcon->ses->chans[i].server->tcpStatus = CifsNeedReconnect; |
|
spin_unlock(&GlobalMid_Lock); |
|
} |
|
break; |
|
case CIFS_SWN_RESOURCE_STATE_AVAILABLE: |
|
cifs_dbg(FYI, "%s: resource name '%s' become available\n", __func__, name); |
|
for (i = 0; i < swnreg->tcon->ses->chan_count; i++) { |
|
spin_lock(&GlobalMid_Lock); |
|
if (swnreg->tcon->ses->chans[i].server->tcpStatus != CifsExiting) |
|
swnreg->tcon->ses->chans[i].server->tcpStatus = CifsNeedReconnect; |
|
spin_unlock(&GlobalMid_Lock); |
|
} |
|
break; |
|
case CIFS_SWN_RESOURCE_STATE_UNKNOWN: |
|
cifs_dbg(FYI, "%s: resource name '%s' changed to unknown state\n", __func__, name); |
|
break; |
|
} |
|
return 0; |
|
} |
|
|
|
static bool cifs_sockaddr_equal(struct sockaddr_storage *addr1, struct sockaddr_storage *addr2) |
|
{ |
|
if (addr1->ss_family != addr2->ss_family) |
|
return false; |
|
|
|
if (addr1->ss_family == AF_INET) { |
|
return (memcmp(&((const struct sockaddr_in *)addr1)->sin_addr, |
|
&((const struct sockaddr_in *)addr2)->sin_addr, |
|
sizeof(struct in_addr)) == 0); |
|
} |
|
|
|
if (addr1->ss_family == AF_INET6) { |
|
return (memcmp(&((const struct sockaddr_in6 *)addr1)->sin6_addr, |
|
&((const struct sockaddr_in6 *)addr2)->sin6_addr, |
|
sizeof(struct in6_addr)) == 0); |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static int cifs_swn_store_swn_addr(const struct sockaddr_storage *new, |
|
const struct sockaddr_storage *old, |
|
struct sockaddr_storage *dst) |
|
{ |
|
__be16 port = cpu_to_be16(CIFS_PORT); |
|
|
|
if (old->ss_family == AF_INET) { |
|
struct sockaddr_in *ipv4 = (struct sockaddr_in *)old; |
|
|
|
port = ipv4->sin_port; |
|
} else if (old->ss_family == AF_INET6) { |
|
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)old; |
|
|
|
port = ipv6->sin6_port; |
|
} |
|
|
|
if (new->ss_family == AF_INET) { |
|
struct sockaddr_in *ipv4 = (struct sockaddr_in *)new; |
|
|
|
ipv4->sin_port = port; |
|
} else if (new->ss_family == AF_INET6) { |
|
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)new; |
|
|
|
ipv6->sin6_port = port; |
|
} |
|
|
|
*dst = *new; |
|
|
|
return 0; |
|
} |
|
|
|
static int cifs_swn_reconnect(struct cifs_tcon *tcon, struct sockaddr_storage *addr) |
|
{ |
|
int ret = 0; |
|
|
|
/* Store the reconnect address */ |
|
mutex_lock(&tcon->ses->server->srv_mutex); |
|
if (cifs_sockaddr_equal(&tcon->ses->server->dstaddr, addr)) |
|
goto unlock; |
|
|
|
ret = cifs_swn_store_swn_addr(addr, &tcon->ses->server->dstaddr, |
|
&tcon->ses->server->swn_dstaddr); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: failed to store address: %d\n", __func__, ret); |
|
goto unlock; |
|
} |
|
tcon->ses->server->use_swn_dstaddr = true; |
|
|
|
/* |
|
* Unregister to stop receiving notifications for the old IP address. |
|
*/ |
|
ret = cifs_swn_unregister(tcon); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: Failed to unregister for witness notifications: %d\n", |
|
__func__, ret); |
|
goto unlock; |
|
} |
|
|
|
/* |
|
* And register to receive notifications for the new IP address now that we have |
|
* stored the new address. |
|
*/ |
|
ret = cifs_swn_register(tcon); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: Failed to register for witness notifications: %d\n", |
|
__func__, ret); |
|
goto unlock; |
|
} |
|
|
|
spin_lock(&GlobalMid_Lock); |
|
if (tcon->ses->server->tcpStatus != CifsExiting) |
|
tcon->ses->server->tcpStatus = CifsNeedReconnect; |
|
spin_unlock(&GlobalMid_Lock); |
|
|
|
unlock: |
|
mutex_unlock(&tcon->ses->server->srv_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static int cifs_swn_client_move(struct cifs_swn_reg *swnreg, struct sockaddr_storage *addr) |
|
{ |
|
struct sockaddr_in *ipv4 = (struct sockaddr_in *)addr; |
|
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)addr; |
|
|
|
if (addr->ss_family == AF_INET) |
|
cifs_dbg(FYI, "%s: move to %pI4\n", __func__, &ipv4->sin_addr); |
|
else if (addr->ss_family == AF_INET6) |
|
cifs_dbg(FYI, "%s: move to %pI6\n", __func__, &ipv6->sin6_addr); |
|
|
|
return cifs_swn_reconnect(swnreg->tcon, addr); |
|
} |
|
|
|
int cifs_swn_notify(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
char name[256]; |
|
int type; |
|
|
|
if (info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]) { |
|
int swnreg_id; |
|
|
|
swnreg_id = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]); |
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
swnreg = idr_find(&cifs_swnreg_idr, swnreg_id); |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
if (swnreg == NULL) { |
|
cifs_dbg(FYI, "%s: registration id %d not found\n", __func__, swnreg_id); |
|
return -EINVAL; |
|
} |
|
} else { |
|
cifs_dbg(FYI, "%s: missing registration id attribute\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
if (info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]) { |
|
type = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]); |
|
} else { |
|
cifs_dbg(FYI, "%s: missing notification type attribute\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
switch (type) { |
|
case CIFS_SWN_NOTIFICATION_RESOURCE_CHANGE: { |
|
int state; |
|
|
|
if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME]) { |
|
nla_strscpy(name, info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME], |
|
sizeof(name)); |
|
} else { |
|
cifs_dbg(FYI, "%s: missing resource name attribute\n", __func__); |
|
return -EINVAL; |
|
} |
|
if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]) { |
|
state = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]); |
|
} else { |
|
cifs_dbg(FYI, "%s: missing resource state attribute\n", __func__); |
|
return -EINVAL; |
|
} |
|
return cifs_swn_resource_state_changed(swnreg, name, state); |
|
} |
|
case CIFS_SWN_NOTIFICATION_CLIENT_MOVE: { |
|
struct sockaddr_storage addr; |
|
|
|
if (info->attrs[CIFS_GENL_ATTR_SWN_IP]) { |
|
nla_memcpy(&addr, info->attrs[CIFS_GENL_ATTR_SWN_IP], sizeof(addr)); |
|
} else { |
|
cifs_dbg(FYI, "%s: missing IP address attribute\n", __func__); |
|
return -EINVAL; |
|
} |
|
return cifs_swn_client_move(swnreg, &addr); |
|
} |
|
default: |
|
cifs_dbg(FYI, "%s: unknown notification type %d\n", __func__, type); |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int cifs_swn_register(struct cifs_tcon *tcon) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
int ret; |
|
|
|
swnreg = cifs_get_swn_reg(tcon); |
|
if (IS_ERR(swnreg)) |
|
return PTR_ERR(swnreg); |
|
|
|
ret = cifs_swn_send_register_message(swnreg); |
|
if (ret < 0) { |
|
cifs_dbg(VFS, "%s: Failed to send swn register message: %d\n", __func__, ret); |
|
/* Do not put the swnreg or return error, the echo task will retry */ |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int cifs_swn_unregister(struct cifs_tcon *tcon) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
|
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
|
|
swnreg = cifs_find_swn_reg(tcon); |
|
if (IS_ERR(swnreg)) { |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
return PTR_ERR(swnreg); |
|
} |
|
|
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
|
|
cifs_put_swn_reg(swnreg); |
|
|
|
return 0; |
|
} |
|
|
|
void cifs_swn_dump(struct seq_file *m) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
struct sockaddr_in *sa; |
|
struct sockaddr_in6 *sa6; |
|
int id; |
|
|
|
seq_puts(m, "Witness registrations:"); |
|
|
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) { |
|
seq_printf(m, "\nId: %u Refs: %u Network name: '%s'%s Share name: '%s'%s Ip address: ", |
|
id, kref_read(&swnreg->ref_count), |
|
swnreg->net_name, swnreg->net_name_notify ? "(y)" : "(n)", |
|
swnreg->share_name, swnreg->share_name_notify ? "(y)" : "(n)"); |
|
switch (swnreg->tcon->ses->server->dstaddr.ss_family) { |
|
case AF_INET: |
|
sa = (struct sockaddr_in *) &swnreg->tcon->ses->server->dstaddr; |
|
seq_printf(m, "%pI4", &sa->sin_addr.s_addr); |
|
break; |
|
case AF_INET6: |
|
sa6 = (struct sockaddr_in6 *) &swnreg->tcon->ses->server->dstaddr; |
|
seq_printf(m, "%pI6", &sa6->sin6_addr.s6_addr); |
|
if (sa6->sin6_scope_id) |
|
seq_printf(m, "%%%u", sa6->sin6_scope_id); |
|
break; |
|
default: |
|
seq_puts(m, "(unknown)"); |
|
} |
|
seq_printf(m, "%s", swnreg->ip_notify ? "(y)" : "(n)"); |
|
} |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
seq_puts(m, "\n"); |
|
} |
|
|
|
void cifs_swn_check(void) |
|
{ |
|
struct cifs_swn_reg *swnreg; |
|
int id; |
|
int ret; |
|
|
|
mutex_lock(&cifs_swnreg_idr_mutex); |
|
idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) { |
|
ret = cifs_swn_send_register_message(swnreg); |
|
if (ret < 0) |
|
cifs_dbg(FYI, "%s: Failed to send register message: %d\n", __func__, ret); |
|
} |
|
mutex_unlock(&cifs_swnreg_idr_mutex); |
|
}
|
|
|