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- backport some post-5.9 fixes

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OBS-URL: https://build.opensuse.org/package/show/network:utilities/ethtool?expand=0&rev=104
This commit is contained in:
Michal Kubeček 2020-11-11 16:59:49 +00:00 committed by Git OBS Bridge
parent 1bf2225f12
commit b63fcb12d6
6 changed files with 595 additions and 0 deletions
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187
ethtool-Improve-compatibility-between-netlink-and-io.patch Normal file
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@ -0,0 +1,187 @@
From: Ido Schimmel <idosch@nvidia.com>
Date: Mon, 9 Nov 2020 14:29:59 +0100
Subject: ethtool: Improve compatibility between netlink and ioctl interfaces
Patch-mainline: v5.10
Git-commit: 124a3c06d1c34b125d84a9eb312fddd365bb7bf6
References: bsc#1178633
With the ioctl interface, when autoneg is enabled, but without
specifying speed, duplex or link modes, the advertised link modes are
set to the supported link modes by the ethtool user space utility.
This does not happen when using the netlink interface. Fix this
incompatibility problem by having ethtool query the supported link modes
from the kernel and advertise all the "real" ones when only "autoneg on"
is specified.
Before:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 100baseT/Half 100baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: off (auto)
Supports Wake-on: umbg
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
After:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: on (auto)
Supports Wake-on: umbg
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
netlink/settings.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -1115,6 +1115,93 @@ static const struct param_parser sset_params[] = {
*/
#define SSET_MAX_MSGS 4
+static int linkmodes_reply_advert_all_cb(const struct nlmsghdr *nlhdr,
+ void *data)
+{
+ const struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1] = {};
+ DECLARE_ATTR_TB_INFO(tb);
+ struct nl_msg_buff *req_msgbuff = data;
+ const struct nlattr *ours_attr;
+ struct nlattr *req_bitset;
+ uint32_t *supported_modes;
+ unsigned int modes_count;
+ unsigned int i;
+ int ret;
+
+ ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info);
+ if (ret < 0)
+ return MNL_CB_ERROR;
+ ours_attr = tb[ETHTOOL_A_LINKMODES_OURS];
+ if (!ours_attr)
+ return MNL_CB_ERROR;
+ modes_count = bitset_get_count(tb[ETHTOOL_A_LINKMODES_OURS], &ret);
+ if (ret < 0)
+ return MNL_CB_ERROR;
+ supported_modes = get_compact_bitset_mask(tb[ETHTOOL_A_LINKMODES_OURS]);
+ if (!supported_modes)
+ return MNL_CB_ERROR;
+
+ /* keep only "real" link modes */
+ for (i = 0; i < modes_count; i++)
+ if (!lm_class_match(i, LM_CLASS_REAL))
+ supported_modes[i / 32] &= ~((uint32_t)1 << (i % 32));
+
+ req_bitset = ethnla_nest_start(req_msgbuff, ETHTOOL_A_LINKMODES_OURS);
+ if (!req_bitset)
+ return MNL_CB_ERROR;
+
+ if (ethnla_put_u32(req_msgbuff, ETHTOOL_A_BITSET_SIZE, modes_count) ||
+ ethnla_put(req_msgbuff, ETHTOOL_A_BITSET_VALUE,
+ DIV_ROUND_UP(modes_count, 32) * sizeof(uint32_t),
+ supported_modes) ||
+ ethnla_put(req_msgbuff, ETHTOOL_A_BITSET_MASK,
+ DIV_ROUND_UP(modes_count, 32) * sizeof(uint32_t),
+ supported_modes)) {
+ ethnla_nest_cancel(req_msgbuff, req_bitset);
+ return MNL_CB_ERROR;
+ }
+
+ ethnla_nest_end(req_msgbuff, req_bitset);
+ return MNL_CB_OK;
+}
+
+/* For compatibility reasons with ioctl-based ethtool, when "autoneg on" is
+ * specified without "advertise", "speed" and "duplex", we need to query the
+ * supported link modes from the kernel and advertise all the "real" ones.
+ */
+static int nl_sset_compat_linkmodes(struct nl_context *nlctx,
+ struct nl_msg_buff *msgbuff)
+{
+ const struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1] = {};
+ DECLARE_ATTR_TB_INFO(tb);
+ struct nl_socket *nlsk = nlctx->ethnl_socket;
+ int ret;
+
+ ret = mnl_attr_parse(msgbuff->nlhdr, GENL_HDRLEN, attr_cb, &tb_info);
+ if (ret < 0)
+ return ret;
+ if (!tb[ETHTOOL_A_LINKMODES_AUTONEG] || tb[ETHTOOL_A_LINKMODES_OURS] ||
+ tb[ETHTOOL_A_LINKMODES_SPEED] || tb[ETHTOOL_A_LINKMODES_DUPLEX])
+ return 0;
+ if (!mnl_attr_get_u8(tb[ETHTOOL_A_LINKMODES_AUTONEG]))
+ return 0;
+
+ /* all conditions satisfied, create ETHTOOL_A_LINKMODES_OURS */
+ if (netlink_cmd_check(nlctx->ctx, ETHTOOL_MSG_LINKMODES_GET, false) ||
+ netlink_cmd_check(nlctx->ctx, ETHTOOL_MSG_LINKMODES_SET, false))
+ return -EOPNOTSUPP;
+ ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_LINKMODES_GET,
+ ETHTOOL_A_LINKMODES_HEADER,
+ ETHTOOL_FLAG_COMPACT_BITSETS);
+ if (ret < 0)
+ return ret;
+ ret = nlsock_sendmsg(nlsk, NULL);
+ if (ret < 0)
+ return ret;
+ return nlsock_process_reply(nlsk, linkmodes_reply_advert_all_cb,
+ msgbuff);
+}
+
int nl_sset(struct cmd_context *ctx)
{
struct nl_msg_buff *msgbuffs[SSET_MAX_MSGS] = {};
@@ -1136,6 +1223,11 @@ int nl_sset(struct cmd_context *ctx)
for (i = 0; i < SSET_MAX_MSGS && msgbuffs[i]; i++) {
struct nl_socket *nlsk = nlctx->ethnl_socket;
+ if (msgbuffs[i]->genlhdr->cmd == ETHTOOL_MSG_LINKMODES_SET) {
+ ret = nl_sset_compat_linkmodes(nlctx, msgbuffs[i]);
+ if (ret < 0)
+ goto out_free;
+ }
ret = nlsock_sendmsg(nlsk, msgbuffs[i]);
if (ret < 0)
goto out_free;

9
ethtool.changes
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@ -1,3 +1,12 @@
-------------------------------------------------------------------
Wed Nov 11 16:57:07 UTC 2020 - Michal Kubecek <mkubecek@suse.cz>
- backport post-5.9 fixes
* netlink-fix-use-after-free-in-netlink_run_handler.patch
* netlink-fix-leaked-instances-of-struct-nl_socket.patch
* netlink-do-not-send-messages-and-process-replies-in-.patch
* ethtool-Improve-compatibility-between-netlink-and-io.patch
-------------------------------------------------------------------
Thu Oct 15 18:50:12 UTC 2020 - Michal Kubecek <mkubecek@suse.cz>

9
ethtool.spec
View File

@ -33,12 +33,21 @@ BuildRequires: pkgconfig
BuildRequires: xz
BuildRequires: pkgconfig(libmnl)
Patch1: netlink-fix-use-after-free-in-netlink_run_handler.patch
Patch2: netlink-fix-leaked-instances-of-struct-nl_socket.patch
Patch3: netlink-do-not-send-messages-and-process-replies-in-.patch
Patch4: ethtool-Improve-compatibility-between-netlink-and-io.patch
%description
Ethtool is a small utility for examining and tuning ethernet-based
network interfaces. See the man page for more details.
%prep
%setup -q
%patch1 -p1
%patch2 -p1
%patch3 -p1
%patch4 -p1
%build
export CFLAGS="%optflags -Wall -Wextra -Wstrict-prototypes -Wformat-security -Wpointer-arith"

281
netlink-do-not-send-messages-and-process-replies-in-.patch Normal file
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@ -0,0 +1,281 @@
From: Michal Kubecek <mkubecek@suse.cz>
Date: Mon, 9 Nov 2020 14:29:56 +0100
Subject: netlink: do not send messages and process replies in nl_parser()
Patch-mainline: v5.10
Git-commit: acd9730d1e794f85caf1192fe8788876e6f96305
References: bsc#1178633
When called with group_style = PARSER_GROUP_MSG, nl_parser() not only
parses the command line and composes the messages but also sends them to
kernel and processes the replies. This is inconsistent with other modes and
also impractical as it takes the control over the process from caller where
it belongs.
Modify nl_parser() to pass composed messages back to caller (which is only
nl_sset() at the moment) and let it send requests and process replies. This
will be needed for an upcoming backward compatibility patch which will need
to inspect and possibly modify one of the composed messages.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
netlink/cable_test.c | 2 +-
netlink/channels.c | 2 +-
netlink/coalesce.c | 2 +-
netlink/eee.c | 2 +-
netlink/parser.c | 43 ++++++++++++++++++++++++++++---------------
netlink/parser.h | 3 ++-
netlink/pause.c | 2 +-
netlink/rings.c | 2 +-
netlink/settings.c | 35 ++++++++++++++++++++++++++++++-----
9 files changed, 66 insertions(+), 27 deletions(-)
--- a/netlink/cable_test.c
+++ b/netlink/cable_test.c
@@ -574,7 +574,7 @@ int nl_cable_test_tdr(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, tdr_params, NULL, PARSER_GROUP_NEST);
+ ret = nl_parser(nlctx, tdr_params, NULL, PARSER_GROUP_NEST, NULL);
if (ret < 0)
return ret;
--- a/netlink/channels.c
+++ b/netlink/channels.c
@@ -126,7 +126,7 @@ int nl_schannels(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, schannels_params, NULL, PARSER_GROUP_NONE);
+ ret = nl_parser(nlctx, schannels_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
--- a/netlink/coalesce.c
+++ b/netlink/coalesce.c
@@ -254,7 +254,7 @@ int nl_scoalesce(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, scoalesce_params, NULL, PARSER_GROUP_NONE);
+ ret = nl_parser(nlctx, scoalesce_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
--- a/netlink/eee.c
+++ b/netlink/eee.c
@@ -174,7 +174,7 @@ int nl_seee(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, seee_params, NULL, PARSER_GROUP_NONE);
+ ret = nl_parser(nlctx, seee_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
--- a/netlink/parser.c
+++ b/netlink/parser.c
@@ -920,7 +920,7 @@ static void __parser_set(uint64_t *map, unsigned int idx)
}
struct tmp_buff {
- struct nl_msg_buff msgbuff;
+ struct nl_msg_buff *msgbuff;
unsigned int id;
unsigned int orig_len;
struct tmp_buff *next;
@@ -951,7 +951,12 @@ static struct tmp_buff *tmp_buff_find_or_create(struct tmp_buff **phead,
if (!new_buff)
return NULL;
new_buff->id = id;
- msgbuff_init(&new_buff->msgbuff);
+ new_buff->msgbuff = malloc(sizeof(*new_buff->msgbuff));
+ if (!new_buff->msgbuff) {
+ free(new_buff);
+ return NULL;
+ }
+ msgbuff_init(new_buff->msgbuff);
new_buff->next = NULL;
*pbuff = new_buff;
@@ -965,7 +970,10 @@ static void tmp_buff_destroy(struct tmp_buff *head)
while (buff) {
next = buff->next;
- msgbuff_done(&buff->msgbuff);
+ if (buff->msgbuff) {
+ msgbuff_done(buff->msgbuff);
+ free(buff->msgbuff);
+ }
free(buff);
buff = next;
}
@@ -980,13 +988,22 @@ static void tmp_buff_destroy(struct tmp_buff *head)
* param_parser::offset)
* @group_style: defines if identifiers in .group represent separate messages,
* nested attributes or are not allowed
+ * @msgbuffs: (only used for @group_style = PARSER_GROUP_MSG) array to store
+ * pointers to composed messages; caller must make sure this
+ * array is sufficient, i.e. that it has at least as many entries
+ * as the number of different .group values in params array;
+ * entries are filled from the start, remaining entries are not
+ * modified; caller should zero initialize the array before
+ * calling nl_parser()
*/
int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
- void *dest, enum parser_group_style group_style)
+ void *dest, enum parser_group_style group_style,
+ struct nl_msg_buff **msgbuffs)
{
struct nl_socket *nlsk = nlctx->ethnl_socket;
const struct param_parser *parser;
struct tmp_buff *buffs = NULL;
+ unsigned int n_msgbuffs = 0;
struct tmp_buff *buff;
unsigned int n_params;
uint64_t *params_seen;
@@ -1004,7 +1021,7 @@ int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
buff = tmp_buff_find_or_create(&buffs, parser->group);
if (!buff)
goto out_free_buffs;
- msgbuff = &buff->msgbuff;
+ msgbuff = buff->msgbuff;
ret = msg_init(nlctx, msgbuff, parser->group,
NLM_F_REQUEST | NLM_F_ACK);
if (ret < 0)
@@ -1013,7 +1030,7 @@ int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
switch (group_style) {
case PARSER_GROUP_NEST:
ret = -EMSGSIZE;
- nest = ethnla_nest_start(&buff->msgbuff, parser->group);
+ nest = ethnla_nest_start(buff->msgbuff, parser->group);
if (!nest)
goto out_free_buffs;
break;
@@ -1062,7 +1079,7 @@ int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
buff = NULL;
if (parser->group)
buff = tmp_buff_find(buffs, parser->group);
- msgbuff = buff ? &buff->msgbuff : &nlsk->msgbuff;
+ msgbuff = buff ? buff->msgbuff : &nlsk->msgbuff;
param_dest = dest ? ((char *)dest + parser->dest_offset) : NULL;
ret = parser->handler(nlctx, parser->type, parser->handler_data,
@@ -1074,12 +1091,12 @@ int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
if (group_style == PARSER_GROUP_MSG) {
ret = -EOPNOTSUPP;
for (buff = buffs; buff; buff = buff->next)
- if (msgbuff_len(&buff->msgbuff) > buff->orig_len &&
+ if (msgbuff_len(buff->msgbuff) > buff->orig_len &&
netlink_cmd_check(nlctx->ctx, buff->id, false))
goto out_free;
}
for (buff = buffs; buff; buff = buff->next) {
- struct nl_msg_buff *msgbuff = &buff->msgbuff;
+ struct nl_msg_buff *msgbuff = buff->msgbuff;
if (group_style == PARSER_GROUP_NONE ||
msgbuff_len(msgbuff) == buff->orig_len)
@@ -1092,12 +1109,8 @@ int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
goto out_free;
break;
case PARSER_GROUP_MSG:
- ret = nlsock_sendmsg(nlsk, msgbuff);
- if (ret < 0)
- goto out_free;
- ret = nlsock_process_reply(nlsk, nomsg_reply_cb, NULL);
- if (ret < 0)
- goto out_free;
+ msgbuffs[n_msgbuffs++] = msgbuff;
+ buff->msgbuff = NULL;
break;
default:
break;
--- a/netlink/parser.h
+++ b/netlink/parser.h
@@ -143,6 +143,7 @@ int nl_parse_char_bitset(struct nl_context *nlctx, uint16_t type,
/* main entry point called to parse the command line */
int nl_parser(struct nl_context *nlctx, const struct param_parser *params,
- void *dest, enum parser_group_style group_style);
+ void *dest, enum parser_group_style group_style,
+ struct nl_msg_buff **msgbuffs);
#endif /* ETHTOOL_NETLINK_PARSER_H__ */
--- a/netlink/pause.c
+++ b/netlink/pause.c
@@ -208,7 +208,7 @@ int nl_spause(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, spause_params, NULL, PARSER_GROUP_NONE);
+ ret = nl_parser(nlctx, spause_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
--- a/netlink/rings.c
+++ b/netlink/rings.c
@@ -126,7 +126,7 @@ int nl_sring(struct cmd_context *ctx)
ctx->devname, 0))
return -EMSGSIZE;
- ret = nl_parser(nlctx, sring_params, NULL, PARSER_GROUP_NONE);
+ ret = nl_parser(nlctx, sring_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -1110,9 +1110,16 @@ static const struct param_parser sset_params[] = {
{}
};
+/* Maximum number of request messages sent to kernel; must be equal to the
+ * number of different .group values in sset_params[] array.
+ */
+#define SSET_MAX_MSGS 4
+
int nl_sset(struct cmd_context *ctx)
{
+ struct nl_msg_buff *msgbuffs[SSET_MAX_MSGS] = {};
struct nl_context *nlctx = ctx->nlctx;
+ unsigned int i;
int ret;
nlctx->cmd = "-s";
@@ -1120,11 +1127,29 @@ int nl_sset(struct cmd_context *ctx)
nlctx->argc = ctx->argc;
nlctx->devname = ctx->devname;
- ret = nl_parser(nlctx, sset_params, NULL, PARSER_GROUP_MSG);
- if (ret < 0)
- return 1;
+ ret = nl_parser(nlctx, sset_params, NULL, PARSER_GROUP_MSG, msgbuffs);
+ if (ret < 0) {
+ ret = 1;
+ goto out_free;
+ }
+
+ for (i = 0; i < SSET_MAX_MSGS && msgbuffs[i]; i++) {
+ struct nl_socket *nlsk = nlctx->ethnl_socket;
- if (ret == 0)
- return 0;
+ ret = nlsock_sendmsg(nlsk, msgbuffs[i]);
+ if (ret < 0)
+ goto out_free;
+ ret = nlsock_process_reply(nlsk, nomsg_reply_cb, NULL);
+ if (ret < 0)
+ goto out_free;
+ }
+
+out_free:
+ for (i = 0; i < SSET_MAX_MSGS && msgbuffs[i]; i++) {
+ msgbuff_done(msgbuffs[i]);
+ free(msgbuffs[i]);
+ }
+ if (ret >= 0)
+ return ret;
return nlctx->exit_code ?: 75;
}

59
netlink-fix-leaked-instances-of-struct-nl_socket.patch Normal file
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@ -0,0 +1,59 @@
From: Michal Kubecek <mkubecek@suse.cz>
Date: Mon, 9 Nov 2020 13:30:57 +0100
Subject: netlink: fix leaked instances of struct nl_socket
Patch-mainline: v5.10
Git-commit: d85f57499d75da5c98b73652488f3f62c6f6d8ea
References: bsc#1178633
Valgrind detected memory leaks caused by missing cleanup of netlink
context's ethnl_socket, ethnl2_socket and rtnl_socket. Also, contrary to
its description, nlsock_done() does not free struct nl_socket itself.
Fix nlsock_done() to free the structure and use it to dispose of sockets
pointed to by struct nl_context members.
Fixes: 50efb3cdd2bb ("netlink: netlink socket wrapper and helpers")
Fixes: 87307c30724d ("netlink: initialize ethtool netlink socket")
Fixes: 7f3585b22a4b ("netlink: add handler for permaddr (-P)")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
netlink/netlink.c | 11 ++++++++---
netlink/nlsock.c | 3 +++
2 files changed, 11 insertions(+), 3 deletions(-)
--- a/netlink/netlink.c
+++ b/netlink/netlink.c
@@ -280,11 +280,16 @@ out_free:
static void netlink_done(struct cmd_context *ctx)
{
- if (!ctx->nlctx)
+ struct nl_context *nlctx = ctx->nlctx;
+
+ if (!nlctx)
return;
- free(ctx->nlctx->ops_flags);
- free(ctx->nlctx);
+ nlsock_done(nlctx->ethnl_socket);
+ nlsock_done(nlctx->ethnl2_socket);
+ nlsock_done(nlctx->rtnl_socket);
+ free(nlctx->ops_flags);
+ free(nlctx);
ctx->nlctx = NULL;
cleanup_all_strings();
}
--- a/netlink/nlsock.c
+++ b/netlink/nlsock.c
@@ -395,8 +395,11 @@ out_msgbuff:
*/
void nlsock_done(struct nl_socket *nlsk)
{
+ if (!nlsk)
+ return;
if (nlsk->sk)
mnl_socket_close(nlsk->sk);
msgbuff_done(&nlsk->msgbuff);
memset(nlsk, '\0', sizeof(*nlsk));
+ free(nlsk);
}

50
netlink-fix-use-after-free-in-netlink_run_handler.patch Normal file
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@ -0,0 +1,50 @@
From: Michal Kubecek <mkubecek@suse.cz>
Date: Mon, 9 Nov 2020 13:30:54 +0100
Subject: netlink: fix use after free in netlink_run_handler()
Patch-mainline: v5.10
Git-commit: 29b38ea218bd978d1950e12cc24da98215a1eeef
References: bsc#1178633
Valgrind detected use after free in netlink_run_handler(): some members of
struct nl_context are accessed after the netlink context is freed by
netlink_done(). Use local variables to store the two flags and check them
instead.
Fixes: 6c19c0d559c8 ("netlink: use genetlink ops information to decide about fallback")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
netlink/netlink.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/netlink/netlink.c
+++ b/netlink/netlink.c
@@ -302,6 +302,7 @@ void netlink_run_handler(struct cmd_context *ctx, nl_func_t nlfunc,
bool no_fallback)
{
bool wildcard = ctx->devname && !strcmp(ctx->devname, WILDCARD_DEVNAME);
+ bool wildcard_unsupported, ioctl_fallback;
struct nl_context *nlctx;
const char *reason;
int ret;
@@ -323,14 +324,17 @@ void netlink_run_handler(struct cmd_context *ctx, nl_func_t nlfunc,
nlctx = ctx->nlctx;
ret = nlfunc(ctx);
+ wildcard_unsupported = nlctx->wildcard_unsupported;
+ ioctl_fallback = nlctx->ioctl_fallback;
netlink_done(ctx);
- if (no_fallback || ret != -EOPNOTSUPP || !nlctx->ioctl_fallback) {
- if (nlctx->wildcard_unsupported)
+
+ if (no_fallback || ret != -EOPNOTSUPP || !ioctl_fallback) {
+ if (wildcard_unsupported)
fprintf(stderr, "%s\n",
"subcommand does not support wildcard dump");
exit(ret >= 0 ? ret : 1);
}
- if (nlctx->wildcard_unsupported)
+ if (wildcard_unsupported)
reason = "subcommand does not support wildcard dump";
else
reason = "kernel netlink support for subcommand missing";