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util: add virNetlinkDumpCommand()

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virNetlinkCommand() processes only one response message, while some
netlink commands, like route dumping, need to process several.
Add virNetlinkDumpCommand() as a virNetlinkCommand() sister.
This commit is contained in:
Cédric Bosdonnat 2017-03-03 12:22:50 +01:00
parent d68cb4f554
commit 754515b7db
3 changed files with 68 additions and 0 deletions
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1
src/libvirt_private.syms
View File

@ -2138,6 +2138,7 @@ virNetDevVPortProfileOpTypeToString;
# util/virnetlink.h
virNetlinkCommand;
virNetlinkDelLink;
virNetlinkDumpCommand;
virNetlinkDumpLink;
virNetlinkEventAddClient;
virNetlinkEventRemoveClient;

58
src/util/virnetlink.c
View File

@ -335,6 +335,52 @@ int virNetlinkCommand(struct nl_msg *nl_msg,
return ret;
}
int
virNetlinkDumpCommand(struct nl_msg *nl_msg,
virNetlinkDumpCallback callback,
uint32_t src_pid, uint32_t dst_pid,
unsigned int protocol, unsigned int groups,
void *opaque)
{
int ret = -1;
bool end = false;
int len = 0;
struct nlmsghdr *resp = NULL;
struct nlmsghdr *msg = NULL;
struct sockaddr_nl nladdr = {
.nl_family = AF_NETLINK,
.nl_pid = dst_pid,
.nl_groups = 0,
};
virNetlinkHandle *nlhandle = NULL;
if (!(nlhandle = virNetlinkSendRequest(nl_msg, src_pid, nladdr,
protocol, groups)))
goto cleanup;
while (!end) {
len = nl_recv(nlhandle, &nladdr, (unsigned char **)&resp, NULL);
for (msg = resp; NLMSG_OK(msg, len); msg = NLMSG_NEXT(msg, len)) {
if (msg->nlmsg_type == NLMSG_DONE)
end = true;
if (virNetlinkGetErrorCode(msg, len) < 0)
goto cleanup;
if (callback(msg, opaque) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
virNetlinkFree(nlhandle);
return ret;
}
/**
* virNetlinkDumpLink:
*
@ -1061,6 +1107,18 @@ int virNetlinkCommand(struct nl_msg *nl_msg ATTRIBUTE_UNUSED,
return -1;
}
int
virNetlinkDumpCommand(struct nl_msg *nl_msg ATTRIBUTE_UNUSED,
virNetlinkDumpCallback callback ATTRIBUTE_UNUSED,
uint32_t src_pid ATTRIBUTE_UNUSED,
uint32_t dst_pid ATTRIBUTE_UNUSED,
unsigned int protocol ATTRIBUTE_UNUSED,
unsigned int groups ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _(unsupported));
return -1;
}
int
virNetlinkDumpLink(const char *ifname ATTRIBUTE_UNUSED,

9
src/util/virnetlink.h
View File

@ -52,6 +52,15 @@ int virNetlinkCommand(struct nl_msg *nl_msg,
uint32_t src_pid, uint32_t dst_pid,
unsigned int protocol, unsigned int groups);
typedef int (*virNetlinkDumpCallback)(const struct nlmsghdr *resp,
void *data);
int virNetlinkDumpCommand(struct nl_msg *nl_msg,
virNetlinkDumpCallback callback,
uint32_t src_pid, uint32_t dst_pid,
unsigned int protocol, unsigned int groups,
void *opaque);
typedef int (*virNetlinkDelLinkFallback)(const char *ifname);
int virNetlinkDelLink(const char *ifname, virNetlinkDelLinkFallback fallback);