[dpdk-dev] [PATCH v5] Restore support for virtio on FreeBSD
Raz Amir
razamir22 at gmail.com
Tue Apr 14 18:23:14 CEST 2015
Fixes: 8a312224bcde ("eal/bsd: fix fd leak")
Closing /dev/io fd causes SIGBUS in inb/outb instructions
as the process loses the IOPL privileges once the fd is closed:
(gdb) bt
0 0x0000000000492f2c in outb (port=49170, data=0 '\000')
at /usr/include/machine/cpufunc.h:244
1 0x0000000000492f7a in outb_p (data=0 '\000', port=49170)
at /dpdk/dpdk-2.0.0/lib/librte_pmd_virtio/virtio_pci.h:211
2 0x000000000049328d in vtpci_set_status (hw=0x80331f380, status=0 '\000')
at /dpdk/dpdk-2.0.0/lib/librte_pmd_virtio/virtio_pci.c:130
3 0x00000000004931fe in vtpci_reset (hw=0x80331f380)
at /dpdk/dpdk-2.0.0/lib/librte_pmd_virtio/virtio_pci.c:108
4 0x00000000004a175e in eth_virtio_dev_init (eth_dev=0x831b80 <rte_eth_devices>)
at /dpdk/dpdk-2.0.0/lib/librte_pmd_virtio/virtio_ethdev.c:1150
5 0x0000000000462c09 in rte_eth_dev_init (pci_drv=0x79d1a0 <rte_virtio_pmd>,
pci_dev=0x802417560) at /dpdk/dpdk-2.0.0/lib/librte_ether/rte_ethdev.c:326
6 0x000000000046f03f in rte_eal_pci_probe_one_driver (dr=0x79d1a0 <rte_virtio_pmd>,
dev=0x802417560) at /dpdk/dpdk-2.0.0/lib/librte_eal/bsdapp/eal/eal_pci.c:487
7 0x0000000000475b06 in pci_probe_all_drivers (dev=0x802417560)
at /dpdk/dpdk-2.0.0/lib/librte_eal/common/eal_common_pci.c:116
8 0x0000000000475bb9 in rte_eal_pci_probe ()
at /dpdk/dpdk-2.0.0/lib/librte_eal/common/eal_common_pci.c:246
9 0x000000000046cd63 in rte_eal_init (argc=5, argv=0x7fffffffeaf0)
at /dpdk/dpdk-2.0.0/lib/librte_eal/bsdapp/eal/eal.c:554
10 0x0000000000404544 in main ()
Signed-off-by: Raz Amir <razamir22 at gmail.com>
---
lib/librte_eal/bsdapp/eal/eal.c | 19 ++++++++++++++-----
lib/librte_eal/common/include/rte_eal.h | 10 ++++++++++
lib/librte_eal/linuxapp/eal/eal.c | 5 +++++
lib/librte_pmd_virtio/virtio_ethdev.c | 9 +++++++++
4 files changed, 38 insertions(+), 5 deletions(-)
diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index 871d5f4..687dd83 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -112,6 +112,9 @@ struct internal_config internal_config;
/* used by rte_rdtsc() */
int rte_cycles_vmware_tsc_map;
+/* fd to keep open for iopl */
+static int iopl_fd = -1;
+
/* Return a pointer to the configuration structure */
struct rte_config *
rte_eal_get_configuration(void)
@@ -421,15 +424,21 @@ int rte_eal_has_hugepages(void)
int
rte_eal_iopl_init(void)
{
- int fd;
-
- fd = open("/dev/io", O_RDWR);
- if (fd < 0)
+ iopl_fd = open("/dev/io", O_RDWR);
+ if (iopl_fd < 0)
return -1;
- close(fd);
+ /* keep fd open for iopl */
return 0;
}
+void
+rte_eal_iopl_uninit(void)
+{
+ if (iopl_fd != -1)
+ close(iopl_fd);
+ iopl_fd = -1;
+}
+
/* Launch threads, called at application init(). */
int
rte_eal_init(int argc, char **argv)
diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h
index 1385a73..9151e08 100644
--- a/lib/librte_eal/common/include/rte_eal.h
+++ b/lib/librte_eal/common/include/rte_eal.h
@@ -127,6 +127,16 @@ enum rte_proc_type_t rte_eal_process_type(void);
int rte_eal_iopl_init(void);
/**
+ * Release iopl priviledge - currently relevant only for FreeBSD.
+ *
+ * This function should be called by pmds which need access to ioports.
+
+ * @return
+ * void
+ */
+void rte_eal_iopl_uninit(void);
+
+/**
* Initialize the Environment Abstraction Layer (EAL).
*
* This function is to be executed on the MASTER lcore only, as soon
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index bd770cf..687cebf 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -695,6 +695,11 @@ rte_eal_iopl_init(void)
#endif
}
+void
+rte_eal_iopl_uninit(void)
+{
+}
+
/* Launch threads, called at application init(). */
int
rte_eal_init(int argc, char **argv)
diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index 7b83d9b..5be5c27 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -1265,6 +1265,14 @@ rte_virtio_pmd_init(const char *name __rte_unused,
return 0;
}
+static int
+rte_virtio_pmd_uninit(const char *name)
+{
+ (void)name;
+ rte_eal_iopl_uninit();
+ return 0;
+}
+
/*
* Only 1 queue is supported, no queue release related operation
*/
@@ -1499,6 +1507,7 @@ __rte_unused uint8_t is_rx)
static struct rte_driver rte_virtio_driver = {
.type = PMD_PDEV,
.init = rte_virtio_pmd_init,
+ .uninit = rte_virtio_pmd_uninit,
};
PMD_REGISTER_DRIVER(rte_virtio_driver);
--
2.1.2
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