sysfs interface for ib_rxe Signed-off-by: Kamal Heib <kam...@mellanox.com> Signed-off-by: Amir Vadai <am...@mellanox.com> Reviewed-by: Haggai Eran <hagg...@mellanox.com> --- drivers/staging/rxe/rxe_sysfs.c | 168 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 drivers/staging/rxe/rxe_sysfs.c
diff --git a/drivers/staging/rxe/rxe_sysfs.c b/drivers/staging/rxe/rxe_sysfs.c new file mode 100644 index 0000000..35bc299 --- /dev/null +++ b/drivers/staging/rxe/rxe_sysfs.c @@ -0,0 +1,168 @@ +/* + * Copyright (c) 2015 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "rxe.h" +#include "rxe_net.h" + +/* Copy argument and remove trailing CR. Return the new length. */ +static int sanitize_arg(const char *val, char *intf, int intf_len) +{ + int len; + + if (!val) + return 0; + + /* Remove newline. */ + for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++) + intf[len] = val[len]; + intf[len] = 0; + + if (len == 0 || (val[len] != 0 && val[len] != '\n')) + return 0; + + return len; +} + +/* Caller must hold net_info_lock */ +static void rxe_set_port_state(struct net_device *ndev) +{ + struct rxe_dev *rxe; + + rxe = net_to_rxe(ndev); + if (!rxe) + goto out; + + if (net_info[ndev->ifindex].status == IB_PORT_ACTIVE) + rxe_net_up(ndev); + else + rxe_net_down(ndev); /* down for unknown state */ +out: + return; +} + +static int rxe_param_set_add(const char *val, struct kernel_param *kp) +{ + int i, len, err; + char intf[32]; + + len = sanitize_arg(val, intf, sizeof(intf)); + if (!len) { + pr_err("rxe: add: invalid interface name\n"); + return -EINVAL; + } + + spin_lock_bh(&net_info_lock); + for (i = 0; i < RXE_MAX_IF_INDEX; i++) { + struct net_device *ndev = net_info[i].ndev; + + if (ndev && (0 == strncmp(intf, ndev->name, len))) { + spin_unlock_bh(&net_info_lock); + if (net_info[i].rxe) + pr_info("rxe: already configured on %s\n", + intf); + else { + err = rxe_net_add(ndev); + if (!err && net_info[i].rxe) { + rxe_set_port_state(ndev); + } else { + pr_err("rxe: add appears to have failed for %s (index %d)\n", + intf, i); + } + } + return 0; + } + } + spin_unlock_bh(&net_info_lock); + + pr_warn("interface %s not found\n", intf); + + return 0; +} + +static void rxe_remove_all(void) +{ + int i; + struct rxe_dev *rxe; + + for (i = 0; i < RXE_MAX_IF_INDEX; i++) { + if (net_info[i].rxe) { + spin_lock_bh(&net_info_lock); + rxe = net_info[i].rxe; + net_info[i].rxe = NULL; + spin_unlock_bh(&net_info_lock); + + rxe_remove(rxe); + } + } +} + +static int rxe_param_set_remove(const char *val, struct kernel_param *kp) +{ + int i, len; + char intf[32]; + struct rxe_dev *rxe; + + len = sanitize_arg(val, intf, sizeof(intf)); + if (!len) { + pr_err("rxe: remove: invalid interface name\n"); + return -EINVAL; + } + + if (strncmp("all", intf, len) == 0) { + pr_info("rxe_sys: remove all"); + rxe_remove_all(); + return 0; + } + + spin_lock_bh(&net_info_lock); + for (i = 0; i < RXE_MAX_IF_INDEX; i++) { + if (!net_info[i].rxe || !net_info[i].ndev) + continue; + + if (0 == strncmp(intf, net_info[i].rxe->ib_dev.name, len)) { + rxe = net_info[i].rxe; + net_info[i].rxe = NULL; + spin_unlock_bh(&net_info_lock); + + rxe_remove(rxe); + return 0; + } + } + spin_unlock_bh(&net_info_lock); + pr_warn("rxe_sys: instance %s not found\n", intf); + + return 0; +} + +module_param_call(add, rxe_param_set_add, NULL, NULL, 0200); +module_param_call(remove, rxe_param_set_remove, NULL, NULL, 0200); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html