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Miller" , Simon Horman , Shuah Khan , linux-kselftest@vger.kernel.org (open list:KERNEL SELFTEST FRAMEWORK), linux-kernel@vger.kernel.org (open list) Subject: [PATCH net-next] selftests: net: cleanup busy_poller.c Date: Tue, 3 Dec 2024 01:28:38 +0000 Message-Id: <20241203012838.182522-1-jdamato@fastly.com> X-Mailer: git-send-email 2.25.1 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" Fix various integer type conversions by using strtoull and a temporary variable which is bounds checked before being casted into the appropriate cfg_* variable for use by the test program. While here, free the strdup'd cfg string for overall hygenie. Signed-off-by: Joe Damato --- tools/testing/selftests/net/busy_poller.c | 86 +++++++++++++---------- 1 file changed, 49 insertions(+), 37 deletions(-) diff --git a/tools/testing/selftests/net/busy_poller.c b/tools/testing/self= tests/net/busy_poller.c index 99b0e8c17fca..ef62d7145598 100644 --- a/tools/testing/selftests/net/busy_poller.c +++ b/tools/testing/selftests/net/busy_poller.c @@ -54,16 +54,16 @@ struct epoll_params { #define EPIOCGPARAMS _IOR(EPOLL_IOC_TYPE, 0x02, struct epoll_params) #endif =20 -static uint32_t cfg_port =3D 8000; +static uint16_t cfg_port =3D 8000; static struct in_addr cfg_bind_addr =3D { .s_addr =3D INADDR_ANY }; static char *cfg_outfile; static int cfg_max_events =3D 8; -static int cfg_ifindex; +static uint32_t cfg_ifindex; =20 /* busy poll params */ static uint32_t cfg_busy_poll_usecs; -static uint32_t cfg_busy_poll_budget; -static uint32_t cfg_prefer_busy_poll; +static uint16_t cfg_busy_poll_budget; +static uint8_t cfg_prefer_busy_poll; =20 /* IRQ params */ static uint32_t cfg_defer_hard_irqs; @@ -79,6 +79,7 @@ static void usage(const char *filepath) =20 static void parse_opts(int argc, char **argv) { + unsigned long long tmp; int ret; int c; =20 @@ -86,31 +87,40 @@ static void parse_opts(int argc, char **argv) usage(argv[0]); =20 while ((c =3D getopt(argc, argv, "p:m:b:u:P:g:o:d:r:s:i:")) !=3D -1) { + /* most options take integer values, except o and b, so reduce + * code duplication a bit for the common case by calling + * strtoull here and leave bounds checking and casting per + * option below. + */ + if (c !=3D 'o' && c !=3D 'b') + tmp =3D strtoull(optarg, NULL, 0); + switch (c) { case 'u': - cfg_busy_poll_usecs =3D strtoul(optarg, NULL, 0); - if (cfg_busy_poll_usecs =3D=3D ULONG_MAX || - cfg_busy_poll_usecs > UINT32_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > UINT32_MAX) error(1, ERANGE, "busy_poll_usecs too large"); + + cfg_busy_poll_usecs =3D (uint32_t)tmp; break; case 'P': - cfg_prefer_busy_poll =3D strtoul(optarg, NULL, 0); - if (cfg_prefer_busy_poll =3D=3D ULONG_MAX || - cfg_prefer_busy_poll > 1) + if (tmp =3D=3D ULLONG_MAX || tmp > 1) error(1, ERANGE, "prefer busy poll should be 0 or 1"); + + cfg_prefer_busy_poll =3D (uint8_t)tmp; break; case 'g': - cfg_busy_poll_budget =3D strtoul(optarg, NULL, 0); - if (cfg_busy_poll_budget =3D=3D ULONG_MAX || - cfg_busy_poll_budget > UINT16_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > UINT16_MAX) error(1, ERANGE, "busy poll budget must be [0, UINT16_MAX]"); + + cfg_busy_poll_budget =3D (uint16_t)tmp; break; case 'p': - cfg_port =3D strtoul(optarg, NULL, 0); - if (cfg_port > UINT16_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > UINT16_MAX) error(1, ERANGE, "port must be <=3D 65535"); + + cfg_port =3D (uint16_t)tmp; break; case 'b': ret =3D inet_aton(optarg, &cfg_bind_addr); @@ -124,41 +134,39 @@ static void parse_opts(int argc, char **argv) error(1, 0, "outfile invalid"); break; case 'm': - cfg_max_events =3D strtol(optarg, NULL, 0); - - if (cfg_max_events =3D=3D LONG_MIN || - cfg_max_events =3D=3D LONG_MAX || - cfg_max_events <=3D 0) + if (tmp =3D=3D ULLONG_MAX || tmp > INT_MAX) error(1, ERANGE, - "max events must be > 0 and < LONG_MAX"); + "max events must be > 0 and <=3D INT_MAX"); + + cfg_max_events =3D (int)tmp; break; case 'd': - cfg_defer_hard_irqs =3D strtoul(optarg, NULL, 0); - - if (cfg_defer_hard_irqs =3D=3D ULONG_MAX || - cfg_defer_hard_irqs > INT32_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > INT32_MAX) error(1, ERANGE, "defer_hard_irqs must be <=3D INT32_MAX"); + + cfg_defer_hard_irqs =3D (uint32_t)tmp; break; case 'r': - cfg_gro_flush_timeout =3D strtoull(optarg, NULL, 0); - - if (cfg_gro_flush_timeout =3D=3D ULLONG_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > UINT64_MAX) error(1, ERANGE, - "gro_flush_timeout must be < ULLONG_MAX"); + "gro_flush_timeout must be < UINT64_MAX"); + + cfg_gro_flush_timeout =3D (uint64_t)tmp; break; case 's': - cfg_irq_suspend_timeout =3D strtoull(optarg, NULL, 0); - - if (cfg_irq_suspend_timeout =3D=3D ULLONG_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > UINT64_MAX) error(1, ERANGE, "irq_suspend_timeout must be < ULLONG_MAX"); + + cfg_irq_suspend_timeout =3D (uint64_t)tmp; break; case 'i': - cfg_ifindex =3D strtoul(optarg, NULL, 0); - if (cfg_ifindex =3D=3D ULONG_MAX) + if (tmp =3D=3D ULLONG_MAX || tmp > INT_MAX) error(1, ERANGE, - "ifindex must be < ULONG_MAX"); + "ifindex must be <=3D INT_MAX"); + + cfg_ifindex =3D (int)tmp; break; } } @@ -277,8 +285,8 @@ static void run_poller(void) * here */ epoll_params.busy_poll_usecs =3D cfg_busy_poll_usecs; - epoll_params.busy_poll_budget =3D (uint16_t)cfg_busy_poll_budget; - epoll_params.prefer_busy_poll =3D (uint8_t)cfg_prefer_busy_poll; + epoll_params.busy_poll_budget =3D cfg_busy_poll_budget; + epoll_params.prefer_busy_poll =3D cfg_prefer_busy_poll; epoll_params.__pad =3D 0; =20 val =3D 1; @@ -342,5 +350,9 @@ int main(int argc, char *argv[]) parse_opts(argc, argv); setup_queue(); run_poller(); + + if (cfg_outfile) + free(cfg_outfile); + return 0; } base-commit: 65ae975e97d5aab3ee9dc5ec701b12090572ed43 --=20 2.25.1