From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) by dpdk.org (Postfix) with ESMTP id 2CAFE7D4A for ; Fri, 1 Dec 2017 01:36:47 +0100 (CET) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 96FA620AEB; Thu, 30 Nov 2017 19:36:45 -0500 (EST) Received: from frontend2 ([10.202.2.161]) by compute1.internal (MEProxy); Thu, 30 Nov 2017 19:36:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= cc:date:from:message-id:subject:to:x-me-sender:x-me-sender :x-sasl-enc; s=mesmtp; bh=tHTOmpDYbPZ6hkczIOKA7NjWfJEX6Ev5EDoARW 9JhjI=; b=sObMrhxs0G938RVkBVfJOp0pfBXo6d/6Z+t0d8dV73CctxjvRXuWq6 +VapNIZGBNaM3iHvcwGRXG6n6aSsEOm3vnleCnS+Phds86q84ItEiDa6ll1nGhJu P2fji10upL/ndMAXpag1D9INaF7QbSO7WxLcM27EBw5jSAx8kF794= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:date:from:message-id:subject:to :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=tHTOmpDYbPZ6hkczI OKA7NjWfJEX6Ev5EDoARW9JhjI=; b=UBa8DLZQI9MT/hY0cIuJKAhIY8izdnUi2 mSgOtYOUamIZzWro7klcYmP4BCFdJfosXx41fXN629uuhabc28kyrf1n0kxSELK+ 00cYJm9+5btUM1gxSJdRHi0YCRZLsJCMMdCPuTWEVX+xhFIhWLUc+P1GnW2A61n7 IugbvZNuZkzhRAqbrgs7DdcxcxxeKnO4eHk8AFF6ZuiCH/NW/mZPqtCe91Thkpmi ljUTeP/bfDQqIkHWny9QmB/BtliR0Zgehf/x8VDtH5PfX6ujOCAwnMKxgmRTyAs7 AHcivzTuUkYfPJUGSPAoux/jJqQikLJ9s+ejnjmrmwXsQfcOdP7ZA== X-ME-Sender: Received: from xps.monjalon.net (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id 0884D24ED4; Thu, 30 Nov 2017 19:36:44 -0500 (EST) From: Thomas Monjalon To: jianfeng.tan@intel.com Cc: dev@dpdk.org Date: Fri, 1 Dec 2017 01:36:42 +0100 Message-Id: <20171201003642.19827-1-thomas@monjalon.net> X-Mailer: git-send-email 2.15.0 Subject: [dpdk-dev] [PATCH] bus/vdev: add custom scan hook X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Dec 2017 00:36:47 -0000 The scan callback allows to spawn a vdev automatically given some custom scan rules. It is especially useful to create a TAP device automatically connected to a netdevice as remote. Signed-off-by: Thomas Monjalon --- warning: to be tested --- drivers/bus/vdev/rte_bus_vdev.h | 29 ++++++++++++++++ drivers/bus/vdev/vdev.c | 75 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 104 insertions(+) diff --git a/drivers/bus/vdev/rte_bus_vdev.h b/drivers/bus/vdev/rte_bus_vdev.h index 41762b853..a90382f49 100644 --- a/drivers/bus/vdev/rte_bus_vdev.h +++ b/drivers/bus/vdev/rte_bus_vdev.h @@ -124,6 +124,35 @@ RTE_PMD_EXPORT_NAME(nm, __COUNTER__) #define RTE_PMD_REGISTER_ALIAS(nm, alias)\ static const char *vdrvinit_ ## nm ## _alias = RTE_STR(alias) +typedef void (*rte_vdev_scan_callback)(void *user_arg); + +/** + * Add a callback to be called on vdev scan + * before reading the devargs list. + * + * @param callback + * The function to be called which can update the devargs list. + * @param user_arg + * An opaque pointer passed to callback. + * @return + * 0 on success, -ENOMEM otherwise + */ +int +rte_vdev_add_custom_scan(rte_vdev_scan_callback callback, void *user_arg); + +/** + * Remove a registered scan callback. + * + * @param callback + * The registered function to be removed. + * @param user_arg + * The associated opaque pointer or (void*)-1 for any. + * @return + * 0 on success + */ +int +rte_vdev_remove_custom_scan(rte_vdev_scan_callback callback, void *user_arg); + /** * Initialize a driver specified by name. * diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c index fd7736d63..902f1e128 100644 --- a/drivers/bus/vdev/vdev.c +++ b/drivers/bus/vdev/vdev.c @@ -44,6 +44,8 @@ #include #include #include +#include +#include #include #include "rte_bus_vdev.h" @@ -62,6 +64,16 @@ static struct vdev_device_list vdev_device_list = struct vdev_driver_list vdev_driver_list = TAILQ_HEAD_INITIALIZER(vdev_driver_list); +struct vdev_custom_scan { + TAILQ_ENTRY(vdev_custom_scan) next; + rte_vdev_scan_callback callback; + void *user_arg; +}; +TAILQ_HEAD(vdev_custom_scans, vdev_custom_scan); +static struct vdev_custom_scans vdev_custom_scans = + TAILQ_HEAD_INITIALIZER(vdev_custom_scans); +static rte_spinlock_t vdev_custom_scan_lock = RTE_SPINLOCK_INITIALIZER; + /* register a driver */ void rte_vdev_register(struct rte_vdev_driver *driver) @@ -76,6 +88,53 @@ rte_vdev_unregister(struct rte_vdev_driver *driver) TAILQ_REMOVE(&vdev_driver_list, driver, next); } +int +rte_vdev_add_custom_scan(rte_vdev_scan_callback callback, void *user_arg) +{ + struct vdev_custom_scan *custom_scan; + + rte_spinlock_lock(&vdev_custom_scan_lock); + + /* check if already registered */ + TAILQ_FOREACH(custom_scan, &vdev_custom_scans, next) { + if (custom_scan->callback == callback && + custom_scan->user_arg == user_arg) + break; + } + + if (custom_scan == NULL) { + custom_scan = malloc(sizeof(struct vdev_custom_scan)); + if (custom_scan != NULL) { + custom_scan->callback = callback; + custom_scan->user_arg = user_arg; + TAILQ_INSERT_TAIL(&vdev_custom_scans, custom_scan, next); + } + } + + rte_spinlock_unlock(&vdev_custom_scan_lock); + + return (custom_scan == NULL) ? -ENOMEM : 0; +} + +int +rte_vdev_remove_custom_scan(rte_vdev_scan_callback callback, void *user_arg) +{ + struct vdev_custom_scan *custom_scan, *tmp_scan; + + rte_spinlock_lock(&vdev_custom_scan_lock); + TAILQ_FOREACH_SAFE(custom_scan, &vdev_custom_scans, next, tmp_scan) { + if (custom_scan->callback != callback || + (custom_scan->user_arg != (void *)-1 && + custom_scan->user_arg != user_arg)) + continue; + TAILQ_REMOVE(&vdev_custom_scans, custom_scan, next); + free(custom_scan); + } + rte_spinlock_unlock(&vdev_custom_scan_lock); + + return 0; +} + static int vdev_parse(const char *name, void *addr) { @@ -260,6 +319,22 @@ vdev_scan(void) { struct rte_vdev_device *dev; struct rte_devargs *devargs; + struct vdev_custom_scan *custom_scan; + + /* call custom scan callbacks if any */ + rte_spinlock_lock(&vdev_custom_scan_lock); + TAILQ_FOREACH(custom_scan, &vdev_custom_scans, next) { + if (custom_scan->callback != NULL) + /* + * the callback should update devargs list + * by calling rte_eal_devargs_insert() with + * devargs.bus = rte_bus_find_by_name("vdev"); + * devargs.type = RTE_DEVTYPE_VIRTUAL; + * devargs.policy = RTE_DEV_WHITELISTED; + */ + custom_scan->callback(custom_scan->user_arg); + } + rte_spinlock_unlock(&vdev_custom_scan_lock); /* for virtual devices we scan the devargs_list populated via cmdline */ TAILQ_FOREACH(devargs, &devargs_list, next) { -- 2.15.0