From: Jiri Pirko <j...@mellanox.com> Extend existing devlink reload command by adding option "netns" by which user can instruct kernel to reload the devlink instance into specified network namespace.
Example: $ ip netns add testns1 $ devlink dev reload netdevsim/netdevsim10 netns testns1 Signed-off-by: Jiri Pirko <j...@mellanox.com> --- v1->v2: - fixed manpage - added patch description --- devlink/devlink.c | 31 +++++++++++++++++++++++++++---- include/uapi/linux/devlink.h | 4 ++++ man/man8/devlink-dev.8 | 7 +++++++ 3 files changed, 38 insertions(+), 4 deletions(-) diff --git a/devlink/devlink.c b/devlink/devlink.c index 852e2257cb64..a0cd6a47d26f 100644 --- a/devlink/devlink.c +++ b/devlink/devlink.c @@ -261,6 +261,7 @@ static void ifname_map_free(struct ifname_map *ifname_map) #define DL_OPT_TRAP_NAME BIT(30) #define DL_OPT_TRAP_ACTION BIT(31) #define DL_OPT_TRAP_GROUP_NAME BIT(32) +#define DL_OPT_NETNS BIT(33) struct dl_opts { uint64_t present; /* flags of present items */ @@ -300,6 +301,8 @@ struct dl_opts { const char *trap_name; const char *trap_group_name; enum devlink_trap_action trap_action; + bool netns_is_pid; + uint32_t netns; }; struct dl { @@ -1440,6 +1443,22 @@ static int dl_argv_parse(struct dl *dl, uint64_t o_required, if (err) return err; o_found |= DL_OPT_TRAP_ACTION; + } else if (dl_argv_match(dl, "netns") && + (o_all & DL_OPT_NETNS)) { + const char *netns_str; + + dl_arg_inc(dl); + err = dl_argv_str(dl, &netns_str); + if (err) + return err; + opts->netns = netns_get_fd(netns_str); + if (opts->netns < 0) { + err = dl_argv_uint32_t(dl, &opts->netns); + if (err) + return err; + opts->netns_is_pid = true; + } + o_found |= DL_OPT_NETNS; } else { pr_err("Unknown option \"%s\"\n", dl_argv(dl)); return -EINVAL; @@ -1562,7 +1581,11 @@ static void dl_opts_put(struct nlmsghdr *nlh, struct dl *dl) if (opts->present & DL_OPT_TRAP_ACTION) mnl_attr_put_u8(nlh, DEVLINK_ATTR_TRAP_ACTION, opts->trap_action); - + if (opts->present & DL_OPT_NETNS) + mnl_attr_put_u32(nlh, + opts->netns_is_pid ? DEVLINK_ATTR_NETNS_PID : + DEVLINK_ATTR_NETNS_FD, + opts->netns); } static int dl_argv_parse_put(struct nlmsghdr *nlh, struct dl *dl, @@ -1623,7 +1646,7 @@ static void cmd_dev_help(void) pr_err(" devlink dev eswitch show DEV\n"); pr_err(" devlink dev param set DEV name PARAMETER value VALUE cmode { permanent | driverinit | runtime }\n"); pr_err(" devlink dev param show [DEV name PARAMETER]\n"); - pr_err(" devlink dev reload DEV\n"); + pr_err(" devlink dev reload DEV [ netns { PID | NAME | ID } ]\n"); pr_err(" devlink dev info [ DEV ]\n"); pr_err(" devlink dev flash DEV file PATH [ component NAME ]\n"); } @@ -2724,7 +2747,7 @@ static int cmd_dev_show(struct dl *dl) static void cmd_dev_reload_help(void) { - pr_err("Usage: devlink dev reload [ DEV ]\n"); + pr_err("Usage: devlink dev reload DEV [ netns { PID | NAME | ID } ]\n"); } static int cmd_dev_reload(struct dl *dl) @@ -2740,7 +2763,7 @@ static int cmd_dev_reload(struct dl *dl) nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_RELOAD, NLM_F_REQUEST | NLM_F_ACK); - err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE, 0); + err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE, DL_OPT_NETNS); if (err) return err; diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h index 79e1405db67c..ab09b3b83675 100644 --- a/include/uapi/linux/devlink.h +++ b/include/uapi/linux/devlink.h @@ -421,6 +421,10 @@ enum devlink_attr { DEVLINK_ATTR_RELOAD_FAILED, /* u8 0 or 1 */ + DEVLINK_ATTR_NETNS_FD, /* u32 */ + DEVLINK_ATTR_NETNS_PID, /* u32 */ + DEVLINK_ATTR_NETNS_ID, /* u32 */ + /* add new attributes above here, update the policy in devlink.c */ __DEVLINK_ATTR_MAX, diff --git a/man/man8/devlink-dev.8 b/man/man8/devlink-dev.8 index 1021ee8d064c..2c6acbd3af69 100644 --- a/man/man8/devlink-dev.8 +++ b/man/man8/devlink-dev.8 @@ -62,6 +62,9 @@ devlink-dev \- devlink device configuration .ti -8 .BR "devlink dev reload" .IR DEV +.RI "[ " +.BI "netns { " PID " | " NAME " | " ID " } +.RI "]" .ti -8 .BR "devlink dev info" @@ -167,6 +170,10 @@ If this argument is omitted all parameters supported by devlink devices are list .I "DEV" - Specifies the devlink device to reload. +.BR netns +.BI { " PID " | " NAME " | " ID " } +- Specifies the network namespace to reload into, either by pid, name or id. + .SS devlink dev info - display device information. Display device information provided by the driver. This command can be used to query versions of the hardware components or device components which -- 2.21.0