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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Christian Brauner Cc: leitao@debian.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v1 3/8] net: netconsole: move newline trimming to function Date: Wed, 24 Jan 2024 09:47:01 -0800 Message-ID: <20240124174711.1906102-4-thepacketgeek@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240124174711.1906102-1-thepacketgeek@gmail.com> References: <20240124174711.1906102-1-thepacketgeek@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Move newline trimming logic from `dev_name_store()` to a new function (trim_newline()) for shared use in netconsole.c I was unable to find another useable version of this functionality that wasn't private to another driver (E.g. tools/testing/selftests/pidfd/pidfd_fdinfo_test.c) Signed-off-by: Matthew Wood --- drivers/net/netconsole.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 5e720bcf7102..586945e62210 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -230,6 +230,16 @@ static struct netconsole_target *to_target(struct conf= ig_item *item) struct netconsole_target, group); } =20 +/* Get rid of possible trailing newline, returning the new length */ +static void trim_newline(char *s, size_t maxlen) +{ + size_t len; + + len =3D strnlen(s, maxlen); + if (s[len - 1] =3D=3D '\n') + s[len - 1] =3D '\0'; +} + /* * Attribute operations for netconsole_target. */ @@ -424,7 +434,6 @@ static ssize_t dev_name_store(struct config_item *item,= const char *buf, size_t count) { struct netconsole_target *nt =3D to_target(item); - size_t len; =20 mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { @@ -435,11 +444,7 @@ static ssize_t dev_name_store(struct config_item *item= , const char *buf, } =20 strscpy(nt->np.dev_name, buf, IFNAMSIZ); - - /* Get rid of possible trailing newline from echo(1) */ - len =3D strnlen(nt->np.dev_name, IFNAMSIZ); - if (nt->np.dev_name[len - 1] =3D=3D '\n') - nt->np.dev_name[len - 1] =3D '\0'; + trim_newline(nt->np.dev_name, IFNAMSIZ); =20 mutex_unlock(&dynamic_netconsole_mutex); return strnlen(buf, count); --=20 2.43.0