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[204.195.112.199]) by smtp.gmail.com with ESMTPSA id h9sm28883504pfi.124.2022.02.02.22.00.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Feb 2022 22:00:29 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger , Bruce Richardson , =?UTF-8?q?Morten=20Br=C3=B8rup?= Subject: [PATCH 2/2] eal: support systemd service convention for runtime directory Date: Wed, 2 Feb 2022 22:00:25 -0800 Message-Id: <20220203060025.881552-3-stephen@networkplumber.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220203060025.881552-1-stephen@networkplumber.org> References: <20211223233907.181033-1-stephen@networkplumber.org> <20220203060025.881552-1-stephen@networkplumber.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Systemd.exec supports configuring the runtime directory of a service via RuntimeDirectory=. This creates the directory with the necessary permissions which actual service may not have if running in container. The change to DPDK is to look for the environment RUNTIME_DIRECTORY first and use that in preference to the fallback alternatives. Signed-off-by: Stephen Hemminger Acked-by: Bruce Richardson Reviewed-by: Morten Brørup --- lib/eal/linux/eal.c | 23 +++++++++++++---------- usertools/dpdk-telemetry.py | 9 +++++++-- 2 files changed, 20 insertions(+), 12 deletions(-) diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c index f2551c64b10c..8a5723f3b3a7 100644 --- a/lib/eal/linux/eal.c +++ b/lib/eal/linux/eal.c @@ -86,25 +86,28 @@ struct lcore_config lcore_config[RTE_MAX_LCORE]; /* used by rte_rdtsc() */ int rte_cycles_vmware_tsc_map; -static const char *default_runtime_dir = "/var/run"; - int eal_create_runtime_dir(void) { - const char *directory = default_runtime_dir; - const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR"); - const char *fallback = "/tmp"; + const char *directory; char run_dir[PATH_MAX]; char tmp[PATH_MAX]; int ret; - if (getuid() != 0) { - /* try XDG path first, fall back to /tmp */ - if (xdg_runtime_dir != NULL) - directory = xdg_runtime_dir; + /* from RuntimeDirectory= see systemd.exec */ + directory = getenv("RUNTIME_DIRECTORY"); + if (directory == NULL) { + /* + * Used standard convention defined in + * XDG Base Directory Specification and + * Filesystem Hierachy Standard. + */ + if (getuid() == 0) + directory = "/var/run"; else - directory = fallback; + directory = getenv("XDG_RUNTIME_DIR") ? : "/tmp"; } + /* create DPDK subdirectory under runtime dir */ ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory); if (ret < 0 || ret == sizeof(tmp)) { diff --git a/usertools/dpdk-telemetry.py b/usertools/dpdk-telemetry.py index 5b3bf83356c3..a49f0e76d07b 100755 --- a/usertools/dpdk-telemetry.py +++ b/usertools/dpdk-telemetry.py @@ -75,9 +75,14 @@ def print_socket_options(prefix, paths): def get_dpdk_runtime_dir(fp): """ Using the same logic as in DPDK's EAL, get the DPDK runtime directory based on the file-prefix and user """ + run_dir = os.environ.get('RUNTIME_DIRECTORY') + if run_dir: + return run_dir if (os.getuid() == 0): - return os.path.join('/var/run/dpdk', fp) - return os.path.join(os.environ.get('XDG_RUNTIME_DIR', '/tmp'), 'dpdk', fp) + run_dir = '/var/run' + else: + run_dir = os.environ.get('XDG_RUNTIME_DIR', '/tmp')) + return os.path.join(run_dir, 'dpdk', fp) def list_fp(): -- 2.34.1