diff options
Diffstat (limited to 'src/vlib')
| -rw-r--r-- | src/vlib/CMakeLists.txt | 21 | ||||
| -rw-r--r-- | src/vlib/linux/vmbus.c | 405 | ||||
| -rw-r--r-- | src/vlib/vmbus/vmbus.c | 48 | ||||
| -rw-r--r-- | src/vlib/vmbus/vmbus.h | 45 |
4 files changed, 518 insertions, 1 deletions
diff --git a/src/vlib/CMakeLists.txt b/src/vlib/CMakeLists.txt index 2a6cbd54da2..2209923547a 100644 --- a/src/vlib/CMakeLists.txt +++ b/src/vlib/CMakeLists.txt @@ -26,6 +26,22 @@ install( ) ############################################################################## +# Find lib and include files +############################################################################## +message(STATUS "Looking for libuuid") +find_path(UUID_INCLUDE_DIR NAMES uuid/uuid.h) +find_library(UUID_LIB NAMES uuid) + +if(UUID_INCLUDE_DIR AND UUID_LIB) + include_directories(${UUID_INCLUDE_DIR}) + set(VMBUS_SOURCE linux/vmbus.c) + set(VMBUS_LIBS uuid) + message(STATUS "Found uuid in ${UUID_INCLUDE_DIR}") +else() + message(WARNING "-- libuuid not found - vmbus support disabled") +endif() + +############################################################################## # vlib shared library ############################################################################## add_vpp_library(vlib @@ -56,6 +72,8 @@ add_vpp_library(vlib unix/main.c unix/plugin.c unix/util.c + vmbus/vmbus.c + ${VMBUS_SOURCE} INSTALL_HEADERS buffer_funcs.h @@ -89,6 +107,7 @@ add_vpp_library(vlib unix/plugin.h unix/unix.h vlib.h + vmbus/vmbus.h - LINK_LIBRARIES vppinfra svm ${CMAKE_DL_LIBS} + LINK_LIBRARIES vppinfra svm ${VMBUS_LIBS} ${CMAKE_DL_LIBS} ) diff --git a/src/vlib/linux/vmbus.c b/src/vlib/linux/vmbus.c new file mode 100644 index 00000000000..2af62241d4d --- /dev/null +++ b/src/vlib/linux/vmbus.c @@ -0,0 +1,405 @@ +/* + * Copyright (c) 2018, Microsoft Corporation. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * vmbus.c: Linux user space VMBus bus management. + */ + +#include <vppinfra/linux/sysfs.h> + +#include <vlib/vlib.h> +#include <vlib/vmbus/vmbus.h> +#include <vlib/unix/unix.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <dirent.h> +#include <sys/ioctl.h> +#include <net/if.h> +#include <linux/ethtool.h> +#include <linux/sockios.h> + +#include <uuid/uuid.h> + +static const char sysfs_vmbus_dev_path[] = "/sys/bus/vmbus/devices"; +static const char sysfs_vmbus_drv_path[] = "/sys/bus/vmbus/drivers"; +static const char sysfs_class_net_path[] = "/sys/class/net"; +static const char uio_drv_name[] = "uio_hv_generic"; +static const char netvsc_uuid[] = "f8615163-df3e-46c5-913f-f2d2f965ed0e"; + +typedef struct +{ + int fd; + void *addr; + size_t size; +} linux_vmbus_region_t; + +typedef struct +{ + int fd; + u32 clib_file_index; +} linux_vmbus_irq_t; + +typedef struct +{ + vlib_vmbus_dev_handle_t handle; + vlib_vmbus_addr_t addr; + + /* Device File descriptor */ + int fd; + + /* Minor device for uio device. */ + u32 uio_minor; + + /* private data */ + uword private_data; + +} linux_vmbus_device_t; + +/* Pool of VMBUS devices. */ +typedef struct +{ + vlib_main_t *vlib_main; + linux_vmbus_device_t *linux_vmbus_devices; + +} linux_vmbus_main_t; + +linux_vmbus_main_t linux_vmbus_main; + +static linux_vmbus_device_t * +linux_vmbus_get_device (vlib_vmbus_dev_handle_t h) +{ + linux_vmbus_main_t *lpm = &linux_vmbus_main; + return pool_elt_at_index (lpm->linux_vmbus_devices, h); +} + +uword +vlib_vmbus_get_private_data (vlib_vmbus_dev_handle_t h) +{ + linux_vmbus_device_t *d = linux_vmbus_get_device (h); + return d->private_data; +} + +void +vlib_vmbus_set_private_data (vlib_vmbus_dev_handle_t h, uword private_data) +{ + linux_vmbus_device_t *d = linux_vmbus_get_device (h); + d->private_data = private_data; +} + +vlib_vmbus_addr_t * +vlib_vmbus_get_addr (vlib_vmbus_dev_handle_t h) +{ + linux_vmbus_device_t *d = linux_vmbus_get_device (h); + return &d->addr; +} + +/* Call to allocate/initialize the vmbus subsystem. + This is not an init function so that users can explicitly enable + vmbus only when it's needed. */ +clib_error_t *vmbus_bus_init (vlib_main_t * vm); + +linux_vmbus_main_t linux_vmbus_main; + +/* + * Take VMBus address represented in standard form like: + * "f2c086b2-ff2e-11e8-88de-7bad0a57de05" and convert + * it to u8[16] + */ +static uword +unformat_vlib_vmbus_addr (unformat_input_t * input, va_list * args) +{ + vlib_vmbus_addr_t *addr = va_arg (*args, vlib_vmbus_addr_t *); + uword ret = 0; + u8 *s; + + if (!unformat (input, "%s", &s)) + return 0; + + if (uuid_parse ((char *) s, addr->guid) == 0) + ret = 1; + + vec_free (s); + + return ret; +} + +/* Convert bus address to standard UUID string */ +static u8 * +format_vlib_vmbus_addr (u8 * s, va_list * va) +{ + vlib_vmbus_addr_t *addr = va_arg (*va, vlib_vmbus_addr_t *); + char tmp[40]; + + uuid_unparse (addr->guid, tmp); + return format (s, "%s", tmp); +} + +/* workaround for mlx bug, bring lower device up before unbind */ +static clib_error_t * +vlib_vmbus_raise_lower (int fd, const char *upper_name) +{ + clib_error_t *error = 0; + struct dirent *e; + struct ifreq ifr; + u8 *dev_net_dir; + DIR *dir; + + memset (&ifr, 0, sizeof (ifr)); + + dev_net_dir = format (0, "%s/%s%c", sysfs_class_net_path, upper_name, 0); + + dir = opendir ((char *) dev_net_dir); + + if (!dir) + { + error = clib_error_return (0, "VMBUS failed to open %s", dev_net_dir); + goto done; + } + + while ((e = readdir (dir))) + { + /* look for lower_enXXXX */ + if (strncmp (e->d_name, "lower_", 6)) + continue; + + strncpy (ifr.ifr_name, e->d_name + 6, IFNAMSIZ); + break; + } + closedir (dir); + + if (!e) + goto done; /* no lower device */ + + if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0) + error = clib_error_return_unix (0, "ioctl fetch intf %s flags", + ifr.ifr_name); + else if (!(ifr.ifr_flags & IFF_UP)) + { + ifr.ifr_flags |= IFF_UP; + + if (ioctl (fd, SIOCSIFFLAGS, &ifr) < 0) + error = clib_error_return_unix (0, "ioctl set intf %s flags", + ifr.ifr_name); + } +done: + vec_free (dev_net_dir); + return error; +} + +clib_error_t * +vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr) +{ + clib_error_t *error = 0; + u8 *dev_dir_name; + char *ifname = 0; + static int uio_new_id_needed = 1; + struct dirent *e; + struct ifreq ifr; + u8 *s, *driver_name; + DIR *dir; + int fd; + + dev_dir_name = format (0, "%s/%U", sysfs_vmbus_dev_path, + format_vlib_vmbus_addr, addr); + s = format (0, "%v/driver%c", dev_dir_name, 0); + + driver_name = clib_sysfs_link_to_name ((char *) s); + vec_reset_length (s); + + /* skip if not using the Linux kernel netvsc driver */ + if (!driver_name || strcmp ("hv_netvsc", (char *) driver_name) != 0) + goto done; + + s = format (s, "%v/net%c", dev_dir_name, 0); + dir = opendir ((char *) s); + vec_reset_length (s); + + if (!dir) + return clib_error_return (0, "VMBUS failed to open %s", s); + + while ((e = readdir (dir))) + { + if (e->d_name[0] == '.') /* skip . and .. */ + continue; + + ifname = strdup (e->d_name); + break; + } + closedir (dir); + + if (!ifname) + { + error = clib_error_return (0, + "VMBUS device %U eth not found", + format_vlib_vmbus_addr, addr); + goto done; + } + + + memset (&ifr, 0, sizeof (ifr)); + strncpy (ifr.ifr_name, ifname, IFNAMSIZ); + + /* read up/down flags */ + fd = socket (PF_INET, SOCK_DGRAM, 0); + if (fd < 0) + { + error = clib_error_return_unix (0, "socket"); + goto done; + } + + if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0) + { + error = clib_error_return_unix (0, "ioctl fetch intf %s flags", + ifr.ifr_name); + close (fd); + goto done; + } + + if (ifr.ifr_flags & IFF_UP) + { + error = clib_error_return (0, + "Skipping VMBUS device %U as host interface %s is up", + format_vlib_vmbus_addr, addr, e->d_name); + close (fd); + goto done; + } + + error = vlib_vmbus_raise_lower (fd, ifname); + close (fd); + + if (error) + goto done; + + + /* tell uio_hv_generic about netvsc device type */ + if (uio_new_id_needed) + { + uio_new_id_needed = 0; + + vec_reset_length (s); + s = format (s, "%s/%s/new_id%c", sysfs_vmbus_drv_path, uio_drv_name, 0); + error = clib_sysfs_write ((char *) s, "%s", netvsc_uuid); + + if (error) + goto done; + + } + + /* prefer the simplier driver_override model */ + vec_reset_length (s); + s = format (s, "%/driver_override%c", dev_dir_name, 0); + if (access ((char *) s, F_OK) == 0) + { + clib_sysfs_write ((char *) s, "%s", uio_drv_name); + } + else + { + vec_reset_length (s); + + s = format (s, "%v/driver/unbind%c", dev_dir_name, 0); + error = + clib_sysfs_write ((char *) s, "%U", format_vlib_vmbus_addr, addr); + + if (error) + goto done; + + vec_reset_length (s); + + s = format (s, "%s/%s/bind%c", sysfs_vmbus_drv_path, uio_drv_name, 0); + error = + clib_sysfs_write ((char *) s, "%U", format_vlib_vmbus_addr, addr); + } + vec_reset_length (s); + +done: + free (ifname); + vec_free (s); + vec_free (dev_dir_name); + vec_free (driver_name); + return error; +} + +static clib_error_t * +scan_vmbus_addr (void *arg, u8 * dev_dir_name, u8 * ignored) +{ + vlib_vmbus_addr_t addr, **addrv = arg; + unformat_input_t input; + clib_error_t *err = 0; + + unformat_init_string (&input, (char *) dev_dir_name, + vec_len (dev_dir_name)); + + if (!unformat (&input, "/sys/bus/vmbus/devices/%U", + unformat_vlib_vmbus_addr, &addr)) + err = clib_error_return (0, "unformat error `%v`", dev_dir_name); + + unformat_free (&input); + + if (err) + return err; + + vec_add1 (*addrv, addr); + return 0; +} + +static int +vmbus_addr_cmp (void *v1, void *v2) +{ + vlib_vmbus_addr_t *a1 = v1; + vlib_vmbus_addr_t *a2 = v2; + + return uuid_compare (a1->guid, a2->guid); +} + +vlib_vmbus_addr_t * +vlib_vmbus_get_all_dev_addrs () +{ + vlib_vmbus_addr_t *addrs = 0; + clib_error_t *err; + + err = + foreach_directory_file ((char *) sysfs_vmbus_dev_path, scan_vmbus_addr, + &addrs, /* scan_dirs */ 0); + if (err) + { + vec_free (addrs); + return 0; + } + + vec_sort_with_function (addrs, vmbus_addr_cmp); + + return addrs; +} + +clib_error_t * +linux_vmbus_init (vlib_main_t * vm) +{ + linux_vmbus_main_t *pm = &linux_vmbus_main; + + pm->vlib_main = vm; + + return vlib_call_init_function (vm, unix_input_init); +} + +VLIB_INIT_FUNCTION (linux_vmbus_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vlib/vmbus/vmbus.c b/src/vlib/vmbus/vmbus.c new file mode 100644 index 00000000000..ea395ece6a8 --- /dev/null +++ b/src/vlib/vmbus/vmbus.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2018, Microsoft Corporation. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <vlib/vlib.h> +#include <vlib/vmbus/vmbus.h> +#include <vlib/unix/unix.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <dirent.h> +#include <sys/ioctl.h> +#include <net/if.h> + +/* this is a stub replaced by the Linux specfic version */ +vlib_vmbus_addr_t * __attribute__ ((weak)) vlib_vmbus_get_all_dev_addrs () +{ + return NULL; +} + + +clib_error_t * +vmbus_bus_init (vlib_main_t * vm) +{ + return vlib_call_init_function (vm, vmbus_bus_init); +} + +VLIB_INIT_FUNCTION (vmbus_bus_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vlib/vmbus/vmbus.h b/src/vlib/vmbus/vmbus.h new file mode 100644 index 00000000000..0927b8990d6 --- /dev/null +++ b/src/vlib/vmbus/vmbus.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2018, Microsoft Corporation. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * vmbus.h: VMBus definitions. + */ + +#ifndef included_vlib_vmbus_h +#define included_vlib_vmbus_h + +#include <vlib/vlib.h> + +typedef struct +{ + u8 guid[16]; +} vlib_vmbus_addr_t; +typedef u32 vlib_vmbus_dev_handle_t; + +vlib_vmbus_addr_t *vlib_vmbus_get_all_dev_addrs (); +vlib_vmbus_addr_t *vlib_vmbus_get_addr (vlib_vmbus_dev_handle_t h); +uword vlib_vmbus_get_private_data (vlib_vmbus_dev_handle_t h); +void vlib_vmbus_set_private_data (vlib_vmbus_dev_handle_t h, + uword private_data); + +clib_error_t *vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr); +#endif /* included_vlib_vmbus_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |