From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4DD1D42651; Wed, 27 Sep 2023 13:45:35 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 4E8DD402F0; Wed, 27 Sep 2023 13:45:32 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id 6AD92402E9 for ; Wed, 27 Sep 2023 13:45:30 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1695815129; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t3QZkLxMozZYwtm6l/e7tTv4v5o+z9+056wyl+Q7ylA=; b=HuaKoyGtmRtEsf/JWg9Oy1WO4rWho52q4qp2Bdvh7h3QJBDfb6QH7T1clilHkGYNrQyNmg BajOyDmFUeMbyt8r7eBR3ys4S7nXZP8BAG+J7M4pSwLPIoej8rdzA4c1hhKoGk5h/5IgYw +mHKn3pLz4+Z+WBXOWZILGmj4SW3R9o= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-10-eeuOHZ7dOBq2xBamYVbJ8A-1; Wed, 27 Sep 2023 07:45:25 -0400 X-MC-Unique: eeuOHZ7dOBq2xBamYVbJ8A-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 333A580D69A; Wed, 27 Sep 2023 11:45:25 +0000 (UTC) Received: from dmarchan.redhat.com (unknown [10.45.224.48]) by smtp.corp.redhat.com (Postfix) with ESMTP id 21159C15BB8; Wed, 27 Sep 2023 11:45:23 +0000 (UTC) From: David Marchand To: dev@dpdk.org Cc: probb@iol.unh.edu, Thomas Monjalon , Ferruh Yigit , Andrew Rybchenko Subject: [PATCH v4 2/3] ethdev: avoid panicking in absence of ethdev shared data Date: Wed, 27 Sep 2023 13:45:14 +0200 Message-ID: <20230927114515.1245213-3-david.marchand@redhat.com> In-Reply-To: <20230927114515.1245213-1-david.marchand@redhat.com> References: <20230818091321.2404089-1-david.marchand@redhat.com> <20230927114515.1245213-1-david.marchand@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org This is a preparation step before freeing the ethdev shared data memzone. Previously, because the primary process never freed the memzone, a secondary process could assume this memzone was present. But in the next commit, this will change. Make eth_dev_shared_data_prepare() report whether the memzone is available so that upper level API can react accordingly. Signed-off-by: David Marchand --- lib/ethdev/ethdev_driver.c | 23 ++++++++++++++----- lib/ethdev/ethdev_private.c | 10 +++++--- lib/ethdev/ethdev_private.h | 2 +- lib/ethdev/ethdev_trace.h | 6 +++-- lib/ethdev/rte_ethdev.c | 46 +++++++++++++++++++++++++------------ 5 files changed, 60 insertions(+), 27 deletions(-) diff --git a/lib/ethdev/ethdev_driver.c b/lib/ethdev/ethdev_driver.c index c92cd4b947..b339e325a0 100644 --- a/lib/ethdev/ethdev_driver.c +++ b/lib/ethdev/ethdev_driver.c @@ -92,7 +92,8 @@ rte_eth_dev_allocate(const char *name) /* Synchronize port creation between primary and secondary processes. */ rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); + if (eth_dev_shared_data_prepare() == NULL) + goto unlock; if (eth_dev_allocated(name) != NULL) { RTE_ETHDEV_LOG(ERR, @@ -128,9 +129,10 @@ rte_eth_dev_allocated(const char *name) rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - - ethdev = eth_dev_allocated(name); + if (eth_dev_shared_data_prepare() != NULL) + ethdev = eth_dev_allocated(name); + else + ethdev = NULL; rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); @@ -151,7 +153,8 @@ rte_eth_dev_attach_secondary(const char *name) /* Synchronize port attachment to primary port creation and release. */ rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); + if (eth_dev_shared_data_prepare() == NULL) + goto unlock; for (i = 0; i < RTE_MAX_ETHPORTS; i++) { if (strcmp(eth_dev_shared_data->data[i].name, name) == 0) @@ -166,6 +169,7 @@ rte_eth_dev_attach_secondary(const char *name) RTE_ASSERT(eth_dev->data->port_id == i); } +unlock: rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); return eth_dev; } @@ -219,12 +223,19 @@ rte_eth_dev_probing_finish(struct rte_eth_dev *dev) int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev) { + int ret; + if (eth_dev == NULL) return -EINVAL; rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); + if (eth_dev_shared_data_prepare() == NULL) + ret = -EINVAL; + else + ret = 0; rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); + if (ret != 0) + return ret; if (eth_dev->state != RTE_ETH_DEV_UNUSED) rte_eth_dev_callback_process(eth_dev, diff --git a/lib/ethdev/ethdev_private.c b/lib/ethdev/ethdev_private.c index 6756625729..911de1e595 100644 --- a/lib/ethdev/ethdev_private.c +++ b/lib/ethdev/ethdev_private.c @@ -318,7 +318,7 @@ rte_eth_call_tx_callbacks(uint16_t port_id, uint16_t queue_id, return nb_pkts; } -void +void * eth_dev_shared_data_prepare(void) { const unsigned int flags = 0; @@ -332,8 +332,10 @@ eth_dev_shared_data_prepare(void) rte_socket_id(), flags); } else mz = rte_memzone_lookup(MZ_RTE_ETH_DEV_DATA); - if (mz == NULL) - rte_panic("Cannot allocate ethdev shared data\n"); + if (mz == NULL) { + RTE_ETHDEV_LOG(ERR, "Cannot allocate ethdev shared data\n"); + goto out; + } eth_dev_shared_data = mz->addr; if (rte_eal_process_type() == RTE_PROC_PRIMARY) { @@ -343,6 +345,8 @@ eth_dev_shared_data_prepare(void) sizeof(eth_dev_shared_data->data)); } } +out: + return eth_dev_shared_data; } void diff --git a/lib/ethdev/ethdev_private.h b/lib/ethdev/ethdev_private.h index f7706e6a95..1572da7b48 100644 --- a/lib/ethdev/ethdev_private.h +++ b/lib/ethdev/ethdev_private.h @@ -67,7 +67,7 @@ void eth_dev_fp_ops_setup(struct rte_eth_fp_ops *fpo, const struct rte_eth_dev *dev); -void eth_dev_shared_data_prepare(void) +void *eth_dev_shared_data_prepare(void) __rte_exclusive_locks_required(rte_mcfg_ethdev_get_lock()); void eth_dev_rxq_release(struct rte_eth_dev *dev, uint16_t qid); diff --git a/lib/ethdev/ethdev_trace.h b/lib/ethdev/ethdev_trace.h index 423e71236e..e367d29c3a 100644 --- a/lib/ethdev/ethdev_trace.h +++ b/lib/ethdev/ethdev_trace.h @@ -112,8 +112,9 @@ RTE_TRACE_POINT( RTE_TRACE_POINT( rte_ethdev_trace_owner_new, - RTE_TRACE_POINT_ARGS(uint64_t owner_id), + RTE_TRACE_POINT_ARGS(uint64_t owner_id, int ret), rte_trace_point_emit_u64(owner_id); + rte_trace_point_emit_int(ret); ) RTE_TRACE_POINT( @@ -377,10 +378,11 @@ RTE_TRACE_POINT( RTE_TRACE_POINT( rte_ethdev_trace_owner_get, RTE_TRACE_POINT_ARGS(uint16_t port_id, - const struct rte_eth_dev_owner *owner), + const struct rte_eth_dev_owner *owner, int ret), rte_trace_point_emit_u16(port_id); rte_trace_point_emit_u64(owner->id); rte_trace_point_emit_string(owner->name); + rte_trace_point_emit_int(ret); ) RTE_TRACE_POINT( diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c index e0d22c27c6..5c9495ecfe 100644 --- a/lib/ethdev/rte_ethdev.c +++ b/lib/ethdev/rte_ethdev.c @@ -388,7 +388,7 @@ rte_eth_find_next_sibling(uint16_t port_id, uint16_t ref_port_id) static bool eth_dev_is_allocated(const struct rte_eth_dev *ethdev) { - return ethdev->data->name[0] != '\0'; + return ethdev->data != NULL && ethdev->data->name[0] != '\0'; } int @@ -433,6 +433,8 @@ rte_eth_find_next_owned_by(uint16_t port_id, const uint64_t owner_id) int rte_eth_dev_owner_new(uint64_t *owner_id) { + int ret; + if (owner_id == NULL) { RTE_ETHDEV_LOG(ERR, "Cannot get new owner ID to NULL\n"); return -EINVAL; @@ -440,14 +442,18 @@ rte_eth_dev_owner_new(uint64_t *owner_id) rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - *owner_id = eth_dev_shared_data->next_owner_id++; + if (eth_dev_shared_data_prepare() != NULL) { + *owner_id = eth_dev_shared_data->next_owner_id++; + ret = 0; + } else { + ret = -ENOMEM; + } rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); - rte_ethdev_trace_owner_new(*owner_id); + rte_ethdev_trace_owner_new(*owner_id, ret); - return 0; + return ret; } static int @@ -506,8 +512,10 @@ rte_eth_dev_owner_set(const uint16_t port_id, rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - ret = eth_dev_owner_set(port_id, RTE_ETH_DEV_NO_OWNER, owner); + if (eth_dev_shared_data_prepare() != NULL) + ret = eth_dev_owner_set(port_id, RTE_ETH_DEV_NO_OWNER, owner); + else + ret = -ENOMEM; rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); @@ -525,8 +533,10 @@ rte_eth_dev_owner_unset(const uint16_t port_id, const uint64_t owner_id) rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - ret = eth_dev_owner_set(port_id, owner_id, &new_owner); + if (eth_dev_shared_data_prepare() != NULL) + ret = eth_dev_owner_set(port_id, owner_id, &new_owner); + else + ret = -ENOMEM; rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); @@ -543,8 +553,9 @@ rte_eth_dev_owner_delete(const uint64_t owner_id) rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - if (eth_is_valid_owner_id(owner_id)) { + if (eth_dev_shared_data_prepare() == NULL) { + ret = -ENOMEM; + } else if (eth_is_valid_owner_id(owner_id)) { for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) { struct rte_eth_dev_data *data = rte_eth_devices[port_id].data; @@ -573,6 +584,7 @@ int rte_eth_dev_owner_get(const uint16_t port_id, struct rte_eth_dev_owner *owner) { struct rte_eth_dev *ethdev; + int ret; RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV); ethdev = &rte_eth_devices[port_id]; @@ -591,14 +603,18 @@ rte_eth_dev_owner_get(const uint16_t port_id, struct rte_eth_dev_owner *owner) rte_spinlock_lock(rte_mcfg_ethdev_get_lock()); - eth_dev_shared_data_prepare(); - rte_memcpy(owner, ðdev->data->owner, sizeof(*owner)); + if (eth_dev_shared_data_prepare() != NULL) { + rte_memcpy(owner, ðdev->data->owner, sizeof(*owner)); + ret = 0; + } else { + ret = -ENOMEM; + } rte_spinlock_unlock(rte_mcfg_ethdev_get_lock()); - rte_ethdev_trace_owner_get(port_id, owner); + rte_ethdev_trace_owner_get(port_id, owner, ret); - return 0; + return ret; } int -- 2.41.0