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bridge: Store datapath version into ovsdb

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OVS userspace are backward compatible with older Linux kernel modules.
However, not having the most up-to-date datapath kernel modules can
some times lead to user confusion. Storing the datapath version in
OVSDB allows management software to check and optionally provide
notifications to users.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Andy Zhou
2014-10-16 15:23:11 -07:00
parent f8f417d3df
commit b5cbbcf656
11 changed files with 163 additions and 2 deletions
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31
lib/dpif-netlink.c
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@@ -2141,6 +2141,36 @@ dpif_netlink_recv_purge(struct dpif *dpif_)
fat_rwlock_unlock(&dpif->upcall_lock);
}
static char *
dpif_netlink_get_datapath_version(void)
{
char *version_str = NULL;
#ifdef __linux__
#define MAX_VERSION_STR_SIZE 80
#define LINUX_DATAPATH_VERSION_FILE "/sys/module/openvswitch/version"
FILE *f;
f = fopen(LINUX_DATAPATH_VERSION_FILE, "r");
if (f) {
char *newline;
char version[MAX_VERSION_STR_SIZE];
if (fgets(version, MAX_VERSION_STR_SIZE, f)) {
newline = strchr(version, '\n');
if (newline) {
*newline = '\0';
}
version_str = xstrdup(version);
}
fclose(f);
}
#endif
return version_str;
}
const struct dpif_class dpif_netlink_class = {
"system",
dpif_netlink_enumerate,
@@ -2178,6 +2208,7 @@ const struct dpif_class dpif_netlink_class = {
NULL, /* register_upcall_cb */
NULL, /* enable_upcall */
NULL, /* disable_upcall */
dpif_netlink_get_datapath_version, /* get_datapath_version */
};
static int