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authorDamjan Marion <damarion@cisco.com>2017-09-08 12:26:12 +0200
committerDave Barach <openvpp@barachs.net>2017-09-08 15:24:50 +0000
commit3b64d6334b4e8d0759cff043a55042f88d1ccb0e (patch)
tree199b79ee32c1f5eb7596b2a4a6dbc8c1290b1b59 /src/vlib/linux
parent2234983112fb9099135fcd1da9186004cbdf6e21 (diff)
vlib: move linux-specific code to vlib/linux
Change-Id: Id79d2c2be7a98e15416a537c890a8f2dd6d4464d Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/linux')
-rw-r--r--src/vlib/linux/pci.c666
-rw-r--r--src/vlib/linux/physmem.c411
-rw-r--r--src/vlib/linux/syscall.h58
-rw-r--r--src/vlib/linux/sysfs.c250
-rw-r--r--src/vlib/linux/sysfs.h44
5 files changed, 1429 insertions, 0 deletions
diff --git a/src/vlib/linux/pci.c b/src/vlib/linux/pci.c
new file mode 100644
index 00000000000..cd2affdc903
--- /dev/null
+++ b/src/vlib/linux/pci.c
@@ -0,0 +1,666 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * 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.
+ */
+/*
+ * pci.c: Linux user space PCI bus management.
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/pci/pci.h>
+#include <vlib/unix/unix.h>
+#include <vlib/linux/sysfs.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>
+
+typedef struct
+{
+ /* /sys/bus/pci/devices/... directory name for this device. */
+ u8 *dev_dir_name;
+
+ /* Resource file descriptors. */
+ int *resource_fds;
+
+ /* File descriptor for config space read/write. */
+ int config_fd;
+
+ /* File descriptor for /dev/uio%d */
+ int uio_fd;
+
+ /* Minor device for uio device. */
+ u32 uio_minor;
+
+ /* Index given by unix_file_add. */
+ u32 unix_file_index;
+
+} linux_pci_device_t;
+
+/* Pool of PCI devices. */
+typedef struct
+{
+ vlib_main_t *vlib_main;
+ linux_pci_device_t *linux_pci_devices;
+} linux_pci_main_t;
+
+extern linux_pci_main_t linux_pci_main;
+
+/* Call to allocate/initialize the pci subsystem.
+ This is not an init function so that users can explicitly enable
+ pci only when it's needed. */
+clib_error_t *pci_bus_init (vlib_main_t * vm);
+
+clib_error_t *vlib_pci_bind_to_uio (vlib_pci_device_t * d,
+ char *uio_driver_name);
+
+linux_pci_main_t linux_pci_main;
+
+clib_error_t *
+vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name)
+{
+ clib_error_t *error = 0;
+ u8 *s = 0, *driver_name = 0;
+ DIR *dir = 0;
+ struct dirent *e;
+ int fd, clear_driver_override = 0;
+ u8 *dev_dir_name = format (0, "/sys/bus/pci/devices/%U",
+ format_vlib_pci_addr, &d->bus_address);
+
+ s = format (s, "%v/driver%c", dev_dir_name, 0);
+ driver_name = vlib_sysfs_link_to_name ((char *) s);
+ vec_reset_length (s);
+
+ if (driver_name &&
+ ((strcmp ("vfio-pci", (char *) driver_name) == 0) ||
+ (strcmp ("uio_pci_generic", (char *) driver_name) == 0) ||
+ (strcmp ("igb_uio", (char *) driver_name) == 0)))
+ goto done;
+
+ /* walk trough all linux interfaces and if interface belonging to
+ this device is founf check if interface is admin up */
+ dir = opendir ("/sys/class/net");
+ s = format (s, "%U%c", format_vlib_pci_addr, &d->bus_address, 0);
+
+ if (!dir)
+ {
+ error = clib_error_return (0, "Skipping PCI device %U: failed to "
+ "read /sys/class/net",
+ format_vlib_pci_addr, &d->bus_address);
+ goto done;
+ }
+
+ fd = socket (PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0)
+ {
+ error = clib_error_return_unix (0, "socket");
+ goto done;
+ }
+
+ while ((e = readdir (dir)))
+ {
+ struct ifreq ifr;
+ struct ethtool_drvinfo drvinfo;
+
+ if (e->d_name[0] == '.') /* skip . and .. */
+ continue;
+
+ memset (&ifr, 0, sizeof ifr);
+ memset (&drvinfo, 0, sizeof drvinfo);
+ ifr.ifr_data = (char *) &drvinfo;
+ strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1);
+ drvinfo.cmd = ETHTOOL_GDRVINFO;
+ if (ioctl (fd, SIOCETHTOOL, &ifr) < 0)
+ {
+ /* Some interfaces (eg "lo") don't support this ioctl */
+ if ((errno != ENOTSUP) && (errno != ENODEV))
+ clib_unix_warning ("ioctl fetch intf %s bus info error",
+ e->d_name);
+ continue;
+ }
+
+ if (strcmp ((char *) s, drvinfo.bus_info))
+ continue;
+
+ memset (&ifr, 0, sizeof (ifr));
+ strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1);
+ if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0)
+ {
+ error = clib_error_return_unix (0, "ioctl fetch intf %s flags",
+ e->d_name);
+ close (fd);
+ goto done;
+ }
+
+ if (ifr.ifr_flags & IFF_UP)
+ {
+ error = clib_error_return (0, "Skipping PCI device %U as host "
+ "interface %s is up",
+ format_vlib_pci_addr, &d->bus_address,
+ e->d_name);
+ close (fd);
+ goto done;
+ }
+ }
+
+ close (fd);
+ vec_reset_length (s);
+
+ s = format (s, "%v/driver/unbind%c", dev_dir_name, 0);
+ vlib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address);
+ vec_reset_length (s);
+
+ s = format (s, "%v/driver_override%c", dev_dir_name, 0);
+ if (access ((char *) s, F_OK) == 0)
+ {
+ vlib_sysfs_write ((char *) s, "%s", uio_driver_name);
+ clear_driver_override = 1;
+ }
+ else
+ {
+ vec_reset_length (s);
+ s = format (s, "/sys/bus/pci/drivers/%s/new_id%c", uio_driver_name, 0);
+ vlib_sysfs_write ((char *) s, "0x%04x 0x%04x", d->vendor_id,
+ d->device_id);
+ }
+ vec_reset_length (s);
+
+ s = format (s, "/sys/bus/pci/drivers/%s/bind%c", uio_driver_name, 0);
+ vlib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address);
+ vec_reset_length (s);
+
+ if (clear_driver_override)
+ {
+ s = format (s, "%v/driver_override%c", dev_dir_name, 0);
+ vlib_sysfs_write ((char *) s, "%c", 0);
+ vec_reset_length (s);
+ }
+
+done:
+ closedir (dir);
+ vec_free (s);
+ vec_free (dev_dir_name);
+ vec_free (driver_name);
+ return error;
+}
+
+
+static clib_error_t *
+scan_uio_dir (void *arg, u8 * path_name, u8 * file_name)
+{
+ linux_pci_device_t *l = arg;
+ unformat_input_t input;
+
+ unformat_init_string (&input, (char *) file_name, vec_len (file_name));
+
+ if (!unformat (&input, "uio%d", &l->uio_minor))
+ abort ();
+
+ unformat_free (&input);
+ return 0;
+}
+
+static clib_error_t *
+linux_pci_uio_read_ready (unix_file_t * uf)
+{
+ vlib_pci_main_t *pm = &pci_main;
+ vlib_pci_device_t *d;
+ int __attribute__ ((unused)) rv;
+
+ u32 icount;
+ rv = read (uf->file_descriptor, &icount, 4);
+
+ d = pool_elt_at_index (pm->pci_devs, uf->private_data);
+
+ if (d->interrupt_handler)
+ d->interrupt_handler (d);
+
+ vlib_pci_intr_enable (d);
+
+ return /* no error */ 0;
+}
+
+static clib_error_t *
+linux_pci_uio_error_ready (unix_file_t * uf)
+{
+ u32 error_index = (u32) uf->private_data;
+
+ return clib_error_return (0, "pci device %d: error", error_index);
+}
+
+static void
+add_device (vlib_pci_device_t * dev, linux_pci_device_t * pdev)
+{
+ vlib_pci_main_t *pm = &pci_main;
+ linux_pci_main_t *lpm = &linux_pci_main;
+ linux_pci_device_t *l;
+
+ pool_get (lpm->linux_pci_devices, l);
+ l[0] = pdev[0];
+
+ l->dev_dir_name = vec_dup (l->dev_dir_name);
+
+ dev->os_handle = l - lpm->linux_pci_devices;
+
+ {
+ u8 *uio_dir = format (0, "%s/uio", l->dev_dir_name);
+ foreach_directory_file ((char *) uio_dir, scan_uio_dir, l, /* scan_dirs */
+ 1);
+ vec_free (uio_dir);
+ }
+
+ {
+ char *uio_name = (char *) format (0, "/dev/uio%d%c", l->uio_minor, 0);
+ l->uio_fd = open (uio_name, O_RDWR);
+ if (l->uio_fd < 0)
+ clib_unix_error ("open `%s'", uio_name);
+ vec_free (uio_name);
+ }
+
+ {
+ unix_file_t template = { 0 };
+ unix_main_t *um = &unix_main;
+
+ template.read_function = linux_pci_uio_read_ready;
+ template.file_descriptor = l->uio_fd;
+ template.error_function = linux_pci_uio_error_ready;
+ template.private_data = dev - pm->pci_devs;
+
+ l->unix_file_index = unix_file_add (um, &template);
+ }
+}
+
+static void
+linux_pci_device_free (linux_pci_device_t * l)
+{
+ int i;
+ for (i = 0; i < vec_len (l->resource_fds); i++)
+ if (l->resource_fds[i] > 0)
+ close (l->resource_fds[i]);
+ if (l->config_fd > 0)
+ close (l->config_fd);
+ if (l->uio_fd > 0)
+ close (l->uio_fd);
+ vec_free (l->resource_fds);
+ vec_free (l->dev_dir_name);
+}
+
+/* Configuration space read/write. */
+clib_error_t *
+vlib_pci_read_write_config (vlib_pci_device_t * dev,
+ vlib_read_or_write_t read_or_write,
+ uword address, void *data, u32 n_bytes)
+{
+ linux_pci_main_t *lpm = &linux_pci_main;
+ linux_pci_device_t *p;
+ int n;
+
+ p = pool_elt_at_index (lpm->linux_pci_devices, dev->os_handle);
+
+ if (read_or_write == VLIB_READ)
+ n = pread (p->config_fd, data, n_bytes, address);
+ else
+ n = pwrite (p->config_fd, data, n_bytes, address);
+
+ if (n != n_bytes)
+ return clib_error_return_unix (0, "%s",
+ read_or_write == VLIB_READ
+ ? "read" : "write");
+
+ return 0;
+}
+
+static clib_error_t *
+os_map_pci_resource_internal (uword os_handle,
+ u32 resource, u8 * addr, void **result)
+{
+ linux_pci_main_t *pm = &linux_pci_main;
+ linux_pci_device_t *p;
+ struct stat stat_buf;
+ u8 *file_name;
+ int fd;
+ clib_error_t *error;
+ int flags = MAP_SHARED;
+
+ error = 0;
+ p = pool_elt_at_index (pm->linux_pci_devices, os_handle);
+
+ file_name = format (0, "%v/resource%d%c", p->dev_dir_name, resource, 0);
+ fd = open ((char *) file_name, O_RDWR);
+ if (fd < 0)
+ {
+ error = clib_error_return_unix (0, "open `%s'", file_name);
+ goto done;
+ }
+
+ if (fstat (fd, &stat_buf) < 0)
+ {
+ error = clib_error_return_unix (0, "fstat `%s'", file_name);
+ goto done;
+ }
+
+ vec_validate (p->resource_fds, resource);
+ p->resource_fds[resource] = fd;
+ if (addr != 0)
+ flags |= MAP_FIXED;
+
+ *result = mmap (addr,
+ /* size */ stat_buf.st_size,
+ PROT_READ | PROT_WRITE, flags,
+ /* file */ fd,
+ /* offset */ 0);
+ if (*result == (void *) -1)
+ {
+ error = clib_error_return_unix (0, "mmap `%s'", file_name);
+ goto done;
+ }
+
+done:
+ if (error)
+ {
+ if (fd >= 0)
+ close (fd);
+ }
+ vec_free (file_name);
+ return error;
+}
+
+clib_error_t *
+vlib_pci_map_resource (vlib_pci_device_t * dev, u32 resource, void **result)
+{
+ return (os_map_pci_resource_internal
+ (dev->os_handle, resource, 0 /* addr */ ,
+ result));
+}
+
+clib_error_t *
+vlib_pci_map_resource_fixed (vlib_pci_device_t * dev,
+ u32 resource, u8 * addr, void **result)
+{
+ return (os_map_pci_resource_internal
+ (dev->os_handle, resource, addr, result));
+}
+
+void
+vlib_pci_free_device (vlib_pci_device_t * dev)
+{
+ linux_pci_main_t *pm = &linux_pci_main;
+ linux_pci_device_t *l;
+
+ l = pool_elt_at_index (pm->linux_pci_devices, dev->os_handle);
+ linux_pci_device_free (l);
+ pool_put (pm->linux_pci_devices, l);
+}
+
+pci_device_registration_t * __attribute__ ((unused))
+pci_device_next_registered (pci_device_registration_t * r)
+{
+ uword i;
+
+ /* Null vendor id marks end of initialized list. */
+ for (i = 0; r->supported_devices[i].vendor_id != 0; i++)
+ ;
+
+ return clib_elf_section_data_next (r, i * sizeof (r->supported_devices[0]));
+}
+
+static clib_error_t *
+init_device_from_registered (vlib_main_t * vm,
+ vlib_pci_device_t * dev,
+ linux_pci_device_t * pdev)
+{
+ vlib_pci_main_t *pm = &pci_main;
+ pci_device_registration_t *r;
+ pci_device_id_t *i;
+ clib_error_t *error;
+
+ r = pm->pci_device_registrations;
+
+ while (r)
+ {
+ for (i = r->supported_devices; i->vendor_id != 0; i++)
+ if (i->vendor_id == dev->vendor_id && i->device_id == dev->device_id)
+ {
+ error = vlib_pci_bind_to_uio (dev, "uio_pci_generic");
+ if (error)
+ {
+ clib_error_report (error);
+ continue;
+ }
+
+ add_device (dev, pdev);
+ dev->interrupt_handler = r->interrupt_handler;
+ return r->init_function (vm, dev);
+ }
+ r = r->next_registration;
+ }
+ /* No driver, close the PCI config-space FD */
+ close (pdev->config_fd);
+ return 0;
+}
+
+static clib_error_t *
+init_device (vlib_main_t * vm,
+ vlib_pci_device_t * dev, linux_pci_device_t * pdev)
+{
+ return init_device_from_registered (vm, dev, pdev);
+}
+
+static clib_error_t *
+scan_device (void *arg, u8 * dev_dir_name, u8 * ignored)
+{
+ vlib_main_t *vm = arg;
+ vlib_pci_main_t *pm = &pci_main;
+ int fd;
+ u8 *f;
+ clib_error_t *error = 0;
+ vlib_pci_device_t *dev;
+ linux_pci_device_t pdev = { 0 };
+ u32 tmp;
+
+ f = format (0, "%v/config%c", dev_dir_name, 0);
+ fd = open ((char *) f, O_RDWR);
+
+ /* Try read-only access if write fails. */
+ if (fd < 0)
+ fd = open ((char *) f, O_RDONLY);
+
+ if (fd < 0)
+ {
+ error = clib_error_return_unix (0, "open `%s'", f);
+ goto done;
+ }
+
+ pool_get (pm->pci_devs, dev);
+
+ /* You can only read more that 64 bytes of config space as root; so we try to
+ read the full space but fall back to just the first 64 bytes. */
+ if (read (fd, &dev->config_data, sizeof (dev->config_data)) !=
+ sizeof (dev->config_data)
+ && read (fd, &dev->config0,
+ sizeof (dev->config0)) != sizeof (dev->config0))
+ {
+ pool_put (pm->pci_devs, dev);
+ error = clib_error_return_unix (0, "read `%s'", f);
+ close (fd);
+ goto done;
+ }
+
+ {
+ static pci_config_header_t all_ones;
+ if (all_ones.vendor_id == 0)
+ memset (&all_ones, ~0, sizeof (all_ones));
+
+ if (!memcmp (&dev->config0.header, &all_ones, sizeof (all_ones)))
+ {
+ pool_put (pm->pci_devs, dev);
+ error = clib_error_return (0, "invalid PCI config for `%s'", f);
+ close (fd);
+ goto done;
+ }
+ }
+
+ if (dev->config0.header.header_type == 0)
+ pci_config_type0_little_to_host (&dev->config0);
+ else
+ pci_config_type1_little_to_host (&dev->config1);
+
+ /* Parse bus, dev, function from directory name. */
+ {
+ unformat_input_t input;
+
+ unformat_init_string (&input, (char *) dev_dir_name,
+ vec_len (dev_dir_name));
+
+ if (!unformat (&input, "/sys/bus/pci/devices/%U",
+ unformat_vlib_pci_addr, &dev->bus_address))
+ abort ();
+
+ unformat_free (&input);
+
+ }
+
+
+ pdev.config_fd = fd;
+ pdev.dev_dir_name = dev_dir_name;
+
+ hash_set (pm->pci_dev_index_by_pci_addr, dev->bus_address.as_u32,
+ dev - pm->pci_devs);
+
+ vec_reset_length (f);
+ f = format (f, "%v/vpd%c", dev_dir_name, 0);
+ fd = open ((char *) f, O_RDONLY);
+ if (fd >= 0)
+ {
+ while (1)
+ {
+ u8 tag[3];
+ u8 *data = 0;
+ int len;
+
+ if (read (fd, &tag, 3) != 3)
+ break;
+
+ if (tag[0] != 0x82 && tag[0] != 0x90 && tag[0] != 0x91)
+ break;
+
+ len = (tag[2] << 8) | tag[1];
+ vec_validate (data, len);
+
+ if (read (fd, data, len) != len)
+ {
+ vec_free (data);
+ break;
+ }
+ if (tag[0] == 0x82)
+ dev->product_name = data;
+ else if (tag[0] == 0x90)
+ dev->vpd_r = data;
+ else if (tag[0] == 0x91)
+ dev->vpd_w = data;
+
+ data = 0;
+ }
+ close (fd);
+ }
+
+ dev->numa_node = -1;
+ vec_reset_length (f);
+ f = format (f, "%v/numa_node%c", dev_dir_name, 0);
+ vlib_sysfs_read ((char *) f, "%u", &dev->numa_node);
+
+ vec_reset_length (f);
+ f = format (f, "%v/class%c", dev_dir_name, 0);
+ vlib_sysfs_read ((char *) f, "0x%x", &tmp);
+ dev->device_class = tmp >> 8;
+
+ vec_reset_length (f);
+ f = format (f, "%v/vendor%c", dev_dir_name, 0);
+ vlib_sysfs_read ((char *) f, "0x%x", &tmp);
+ dev->vendor_id = tmp;
+
+ vec_reset_length (f);
+ f = format (f, "%v/device%c", dev_dir_name, 0);
+ vlib_sysfs_read ((char *) f, "0x%x", &tmp);
+ dev->device_id = tmp;
+
+ error = init_device (vm, dev, &pdev);
+
+ vec_reset_length (f);
+ f = format (f, "%v/driver%c", dev_dir_name, 0);
+ dev->driver_name = vlib_sysfs_link_to_name ((char *) f);
+
+done:
+ vec_free (f);
+ return error;
+}
+
+clib_error_t *
+linux_pci_init (vlib_main_t * vm)
+{
+ vlib_pci_main_t *pm = &pci_main;
+ clib_error_t *error;
+
+ pm->vlib_main = vm;
+
+ if ((error = vlib_call_init_function (vm, unix_input_init)))
+ return error;
+
+ ASSERT (sizeof (vlib_pci_addr_t) == sizeof (u32));
+ pm->pci_dev_index_by_pci_addr = hash_create (0, sizeof (uword));
+
+ error = foreach_directory_file ("/sys/bus/pci/devices", scan_device, vm,
+ /* scan_dirs */ 0);
+
+ /* Complain and continue. might not be root, etc. */
+ if (error)
+ clib_error_report (error);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (linux_pci_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlib/linux/physmem.c b/src/vlib/linux/physmem.c
new file mode 100644
index 00000000000..6731295caec
--- /dev/null
+++ b/src/vlib/linux/physmem.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * 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.
+ */
+/*
+ * physmem.c: Unix physical memory
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+#include <sys/mman.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <numa.h>
+#include <numaif.h>
+
+#include <vlib/vlib.h>
+#include <vlib/physmem.h>
+#include <vlib/unix/unix.h>
+#include <vlib/linux/syscall.h>
+#include <vlib/linux/sysfs.h>
+
+static void *
+unix_physmem_alloc_aligned (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+ uword n_bytes, uword alignment)
+{
+ vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+ uword lo_offset, hi_offset;
+ uword *to_free = 0;
+
+ if (pr->heap == 0)
+ return 0;
+
+ /* IO memory is always at least cache aligned. */
+ alignment = clib_max (alignment, CLIB_CACHE_LINE_BYTES);
+
+ while (1)
+ {
+ mheap_get_aligned (pr->heap, n_bytes,
+ /* align */ alignment,
+ /* align offset */ 0,
+ &lo_offset);
+
+ /* Allocation failed? */
+ if (lo_offset == ~0)
+ break;
+
+ if (pr->flags & VLIB_PHYSMEM_F_FAKE)
+ break;
+
+ /* Make sure allocation does not span DMA physical chunk boundary. */
+ hi_offset = lo_offset + n_bytes - 1;
+
+ if ((lo_offset >> pr->log2_page_size) ==
+ (hi_offset >> pr->log2_page_size))
+ break;
+
+ /* Allocation would span chunk boundary, queue it to be freed as soon as
+ we find suitable chunk. */
+ vec_add1 (to_free, lo_offset);
+ }
+
+ if (to_free != 0)
+ {
+ uword i;
+ for (i = 0; i < vec_len (to_free); i++)
+ mheap_put (pr->heap, to_free[i]);
+ vec_free (to_free);
+ }
+
+ return lo_offset != ~0 ? pr->heap + lo_offset : 0;
+}
+
+static void
+unix_physmem_free (vlib_main_t * vm, vlib_physmem_region_index_t idx, void *x)
+{
+ vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+ /* Return object to region's heap. */
+ mheap_put (pr->heap, x - pr->heap);
+}
+
+static u64
+get_page_paddr (int fd, uword addr)
+{
+ int pagesize = sysconf (_SC_PAGESIZE);
+ u64 seek, pagemap = 0;
+
+ seek = ((u64) addr / pagesize) * sizeof (u64);
+ if (lseek (fd, seek, SEEK_SET) != seek)
+ {
+ clib_unix_warning ("lseek to 0x%llx", seek);
+ return 0;
+ }
+ if (read (fd, &pagemap, sizeof (pagemap)) != (sizeof (pagemap)))
+ {
+ clib_unix_warning ("read ptbits");
+ return 0;
+ }
+ if ((pagemap & (1ULL << 63)) == 0)
+ return 0;
+
+ pagemap &= pow2_mask (55);
+
+ return pagemap * pagesize;
+}
+
+static clib_error_t *
+unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
+ u8 numa_node, u32 flags,
+ vlib_physmem_region_index_t * idx)
+{
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
+ vlib_physmem_region_t *pr;
+ clib_error_t *error = 0;
+ int pagemap_fd = -1;
+ u8 *mount_dir = 0;
+ u8 *filename = 0;
+ struct stat st;
+ int old_mpol;
+ int mmap_flags;
+ struct bitmask *old_mask = numa_allocate_nodemask ();
+
+ if (geteuid () != 0 && (flags & VLIB_PHYSMEM_F_FAKE) == 0)
+ return clib_error_return (0, "not allowed");
+
+ pool_get (vpm->regions, pr);
+
+ if ((pr - vpm->regions) >= 256)
+ {
+ error = clib_error_return (0, "maximum number of regions reached");
+ goto error;
+ }
+
+ pr->index = pr - vpm->regions;
+ pr->fd = -1;
+ pr->flags = flags;
+
+ if (get_mempolicy (&old_mpol, old_mask->maskp, old_mask->size + 1, NULL, 0)
+ == -1)
+ {
+ error = clib_error_return_unix (0, "get_mempolicy");
+ goto error;
+ }
+
+ if ((flags & VLIB_PHYSMEM_F_FAKE) == 0)
+ {
+ if ((pagemap_fd = open ((char *) "/proc/self/pagemap", O_RDONLY)) == -1)
+ {
+ error = clib_error_return_unix (0, "open '/proc/self/pagemap'");
+ goto error;
+ }
+
+ mount_dir = format (0, "%s/physmem_region%d%c",
+ vlib_unix_get_runtime_dir (), pr->index, 0);
+ filename = format (0, "%s/mem%c", mount_dir, 0);
+
+ unlink ((char *) mount_dir);
+
+ error = vlib_unix_recursive_mkdir ((char *) mount_dir);
+ if (error)
+ goto error;
+
+ if (mount ("none", (char *) mount_dir, "hugetlbfs", 0, NULL))
+ {
+ error = clib_error_return_unix (0, "mount hugetlb directory '%s'",
+ mount_dir);
+ goto error;
+ }
+
+ if ((pr->fd = open ((char *) filename, O_CREAT | O_RDWR, 0755)) == -1)
+ {
+ error = clib_error_return_unix (0, "open");
+ goto error;
+ }
+
+ mmap_flags = MAP_SHARED | MAP_HUGETLB | MAP_LOCKED;
+ }
+ else
+ {
+ if ((pr->fd = memfd_create (name, MFD_ALLOW_SEALING)) == -1)
+ return clib_error_return_unix (0, "memfd_create");
+
+ if ((fcntl (pr->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
+ {
+ error =
+ clib_error_return_unix (0, "fcntl (F_ADD_SEALS, F_SEAL_SHRINK)");
+ goto error;
+ }
+ mmap_flags = MAP_SHARED;
+ }
+
+ if (fstat (pr->fd, &st))
+ {
+ error = clib_error_return_unix (0, "fstat");
+ goto error;
+ }
+
+ pr->log2_page_size = min_log2 (st.st_blksize);
+ pr->n_pages = ((size - 1) >> pr->log2_page_size) + 1;
+ size = pr->n_pages * (1 << pr->log2_page_size);
+
+ if ((ftruncate (pr->fd, size)) == -1)
+ {
+ error = clib_error_return_unix (0, "ftruncate length: %d", size);
+ goto error;
+ }
+
+ if ((flags & VLIB_PHYSMEM_F_FAKE) == 0)
+ {
+ error = vlib_sysfs_prealloc_hugepages (numa_node,
+ 1 << (pr->log2_page_size - 10),
+ pr->n_pages);
+ if (error)
+ goto error;
+ }
+
+ numa_set_preferred (numa_node);
+
+ pr->mem = mmap (0, size, (PROT_READ | PROT_WRITE), mmap_flags, pr->fd, 0);
+
+ if (pr->mem == MAP_FAILED)
+ {
+ pr->mem = 0;
+ error = clib_error_return_unix (0, "mmap");
+ goto error;
+ }
+
+ if (set_mempolicy (old_mpol, old_mask->maskp, old_mask->size + 1) == -1)
+ {
+ error = clib_error_return_unix (0, "set_mempolicy");
+ goto error;
+ }
+
+ pr->size = pr->n_pages << pr->log2_page_size;
+ pr->page_mask = (1 << pr->log2_page_size) - 1;
+ pr->numa_node = numa_node;
+ pr->name = format (0, "%s", name);
+
+ if ((flags & VLIB_PHYSMEM_F_FAKE) == 0)
+ {
+ int i;
+ for (i = 0; i < pr->n_pages; i++)
+ {
+ void *ptr = pr->mem + (i << pr->log2_page_size);
+ int node;
+ move_pages (0, 1, &ptr, 0, &node, 0);
+ if (numa_node != node)
+ {
+ clib_warning
+ ("physmem page for region \'%s\' allocated on the wrong"
+ " numa node (requested %u actual %u)", pr->name,
+ pr->numa_node, node, i);
+ break;
+ }
+ }
+ }
+
+ if (flags & VLIB_PHYSMEM_F_INIT_MHEAP)
+ {
+ pr->heap = mheap_alloc_with_flags (pr->mem, pr->size,
+ /* Don't want mheap mmap/munmap with IO memory. */
+ MHEAP_FLAG_DISABLE_VM |
+ MHEAP_FLAG_THREAD_SAFE);
+ fformat (stdout, "%U", format_mheap, pr->heap, /* verbose */ 1);
+ }
+
+ if (flags & VLIB_PHYSMEM_F_HAVE_BUFFERS)
+ {
+ vlib_buffer_add_mem_range (vm, pointer_to_uword (pr->mem), pr->size);
+ }
+
+ *idx = pr->index;
+
+ if ((flags & VLIB_PHYSMEM_F_FAKE) == 0)
+ {
+ int i;
+ for (i = 0; i < pr->n_pages; i++)
+ {
+ uword vaddr =
+ pointer_to_uword (pr->mem) + (((u64) i) << pr->log2_page_size);
+ u64 page_paddr = get_page_paddr (pagemap_fd, vaddr);
+ vec_add1 (pr->page_table, page_paddr);
+ }
+ }
+
+ goto done;
+
+error:
+ if (pr->fd > -1)
+ close (pr->fd);
+
+ if (pr->mem)
+ munmap (pr->mem, size);
+
+ memset (pr, 0, sizeof (*pr));
+ pool_put (vpm->regions, pr);
+
+done:
+ if (mount_dir)
+ {
+ umount2 ((char *) mount_dir, MNT_DETACH);
+ rmdir ((char *) mount_dir);
+ vec_free (mount_dir);
+ }
+ numa_free_cpumask (old_mask);
+ vec_free (filename);
+ if (pagemap_fd > -1)
+ close (pagemap_fd);
+ return error;
+}
+
+static void
+unix_physmem_region_free (vlib_main_t * vm, vlib_physmem_region_index_t idx)
+{
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
+ vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+
+ if (pr->fd > 0)
+ close (pr->fd);
+ munmap (pr->mem, pr->size);
+ vec_free (pr->name);
+ pool_put (vpm->regions, pr);
+}
+
+clib_error_t *
+unix_physmem_init (vlib_main_t * vm)
+{
+ clib_error_t *error = 0;
+
+ /* Avoid multiple calls. */
+ if (vm->os_physmem_alloc_aligned)
+ return error;
+
+ vm->os_physmem_alloc_aligned = unix_physmem_alloc_aligned;
+ vm->os_physmem_free = unix_physmem_free;
+ vm->os_physmem_region_alloc = unix_physmem_region_alloc;
+ vm->os_physmem_region_free = unix_physmem_region_free;
+
+ return error;
+}
+
+static clib_error_t *
+show_physmem (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
+ vlib_physmem_region_t *pr;
+
+ /* *INDENT-OFF* */
+ pool_foreach (pr, vpm->regions, (
+ {
+ vlib_cli_output (vm, "index %u name '%s' page-size %uKB num-pages %d "
+ "numa-node %u fd %d\n",
+ pr->index, pr->name, (1 << (pr->log2_page_size -10)),
+ pr->n_pages, pr->numa_node, pr->fd);
+ if (pr->heap)
+ vlib_cli_output (vm, " %U", format_mheap, pr->heap, /* verbose */ 1);
+ else
+ vlib_cli_output (vm, " no heap\n");
+ }));
+ /* *INDENT-ON* */
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_physmem_command, static) = {
+ .path = "show physmem",
+ .short_help = "Show physical memory allocation",
+ .function = show_physmem,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlib/linux/syscall.h b/src/vlib/linux/syscall.h
new file mode 100644
index 00000000000..9e37997e8a9
--- /dev/null
+++ b/src/vlib/linux/syscall.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#ifndef included_linux_syscall_h
+#define included_linux_syscall_h
+
+#ifndef __NR_memfd_create
+#if defined __x86_64__
+#define __NR_memfd_create 319
+#elif defined __arm__
+#define __NR_memfd_create 385
+#elif defined __aarch64__
+#define __NR_memfd_create 279
+#else
+#error "__NR_memfd_create unknown for this architecture"
+#endif
+#endif
+
+static inline int
+memfd_create (const char *name, unsigned int flags)
+{
+ return syscall (__NR_memfd_create, name, flags);
+}
+
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE 1024
+#endif
+#define MFD_ALLOW_SEALING 0x0002U
+#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+
+#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
+#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
+#define F_SEAL_GROW 0x0004 /* prevent file from growing */
+#define F_SEAL_WRITE 0x0008 /* prevent writes */
+
+
+#endif /* included_linux_syscall_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlib/linux/sysfs.c b/src/vlib/linux/sysfs.c
new file mode 100644
index 00000000000..f92f9ef564e
--- /dev/null
+++ b/src/vlib/linux/sysfs.c
@@ -0,0 +1,250 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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/unix/unix.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+
+clib_error_t *
+vlib_sysfs_write (char *file_name, char *fmt, ...)
+{
+ u8 *s;
+ int fd;
+ clib_error_t *error = 0;
+
+ fd = open (file_name, O_WRONLY);
+ if (fd < 0)
+ return clib_error_return_unix (0, "open `%s'", file_name);
+
+ va_list va;
+ va_start (va, fmt);
+ s = va_format (0, fmt, &va);
+ va_end (va);
+
+ if (write (fd, s, vec_len (s)) < 0)
+ error = clib_error_return_unix (0, "write `%s'", file_name);
+
+ vec_free (s);
+ close (fd);
+ return error;
+}
+
+clib_error_t *
+vlib_sysfs_read (char *file_name, char *fmt, ...)
+{
+ unformat_input_t input;
+ u8 *s = 0;
+ int fd;
+ ssize_t sz;
+ uword result;
+
+ fd = open (file_name, O_RDONLY);
+ if (fd < 0)
+ return clib_error_return_unix (0, "open `%s'", file_name);
+
+ vec_validate (s, 4095);
+
+ sz = read (fd, s, vec_len (s));
+ if (sz < 0)
+ {
+ close (fd);
+ vec_free (s);
+ return clib_error_return_unix (0, "read `%s'", file_name);
+ }
+
+ _vec_len (s) = sz;
+ unformat_init_vector (&input, s);
+
+ va_list va;
+ va_start (va, fmt);
+ result = va_unformat (&input, fmt, &va);
+ va_end (va);
+
+ vec_free (s);
+ close (fd);
+
+ if (result == 0)
+ return clib_error_return (0, "unformat error");
+
+ return 0;
+}
+
+u8 *
+vlib_sysfs_link_to_name (char *link)
+{
+ char *p, buffer[64];
+ unformat_input_t in;
+ u8 *s = 0;
+ int r;
+
+ r = readlink (link, buffer, sizeof (buffer) - 1);
+
+ if (r < 0)
+ return 0;
+
+ buffer[r] = 0;
+ p = strrchr (buffer, '/');
+
+ if (!p)
+ return 0;
+
+ unformat_init_string (&in, p + 1, strlen (p + 1));
+ if (unformat (&in, "%s", &s) != 1)
+ clib_unix_warning ("no string?");
+ unformat_free (&in);
+
+ return s;
+}
+
+clib_error_t *
+vlib_sysfs_set_nr_hugepages (unsigned int numa_node, int page_size, int nr)
+{
+ clib_error_t *error = 0;
+ struct stat sb;
+ u8 *p = 0;
+
+ p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
+
+ if (stat ((char *) p, &sb) == 0)
+ {
+ if (S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' is not directory", p);
+ goto done;
+ }
+ }
+ else if (numa_node == 0)
+ {
+ vec_reset_length (p);
+ p = format (p, "/sys/kernel/mm%c", 0);
+ if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' does not exist or it is not "
+ "directory", p);
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "'%s' does not exist", p);
+ goto done;
+ }
+
+ _vec_len (p) -= 1;
+ p = format (p, "/hugepages/hugepages-%ukB/nr_hugepages%c", page_size, 0);
+ vlib_sysfs_write ((char *) p, "%d", nr);
+
+done:
+ vec_free (p);
+ return error;
+}
+
+
+static clib_error_t *
+vlib_sysfs_get_xxx_hugepages (char *type, unsigned int numa_node,
+ int page_size, int *val)
+{
+ clib_error_t *error = 0;
+ struct stat sb;
+ u8 *p = 0;
+
+ p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
+
+ if (stat ((char *) p, &sb) == 0)
+ {
+ if (S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' is not directory", p);
+ goto done;
+ }
+ }
+ else if (numa_node == 0)
+ {
+ vec_reset_length (p);
+ p = format (p, "/sys/kernel/mm%c", 0);
+ if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
+ {
+ error = clib_error_return (0, "'%s' does not exist or it is not "
+ "directory", p);
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "'%s' does not exist", p);
+ goto done;
+ }
+
+ _vec_len (p) -= 1;
+ p = format (p, "/hugepages/hugepages-%ukB/%s_hugepages%c", page_size,
+ type, 0);
+ error = vlib_sysfs_read ((char *) p, "%d", val);
+
+done:
+ vec_free (p);
+ return error;
+}
+
+clib_error_t *
+vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size, int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("free", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_get_nr_hugepages (unsigned int numa_node, int page_size, int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("nr", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_get_surplus_hugepages (unsigned int numa_node, int page_size,
+ int *v)
+{
+ return vlib_sysfs_get_xxx_hugepages ("surplus", numa_node, page_size, v);
+}
+
+clib_error_t *
+vlib_sysfs_prealloc_hugepages (unsigned int numa_node, int page_size, int nr)
+{
+ clib_error_t *error = 0;
+ int n, needed;
+ error = vlib_sysfs_get_free_hugepages (numa_node, page_size, &n);
+ if (error)
+ return error;
+ needed = nr - n;
+ if (needed <= 0)
+ return 0;
+
+ error = vlib_sysfs_get_nr_hugepages (numa_node, page_size, &n);
+ if (error)
+ return error;
+ clib_warning ("pre-allocating %u additional %uK hugepages on numa node %u",
+ needed, page_size, numa_node);
+ return vlib_sysfs_set_nr_hugepages (numa_node, page_size, n + needed);
+}
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlib/linux/sysfs.h b/src/vlib/linux/sysfs.h
new file mode 100644
index 00000000000..14b71317ffe
--- /dev/null
+++ b/src/vlib/linux/sysfs.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#ifndef included_linux_sysfs_h
+#define included_linux_sysfs_h
+
+clib_error_t *vlib_sysfs_write (char *file_name, char *fmt, ...);
+
+clib_error_t *vlib_sysfs_read (char *file_name, char *fmt, ...);
+
+u8 *vlib_sysfs_link_to_name (char *link);
+
+clib_error_t *vlib_sysfs_set_nr_hugepages (unsigned int numa_node,
+ int page_size, int nr);
+clib_error_t *vlib_sysfs_get_nr_hugepages (unsigned int numa_node,
+ int page_size, int *v);
+clib_error_t *vlib_sysfs_get_free_hugepages (unsigned int numa_node,
+ int page_size, int *v);
+clib_error_t *vlib_sysfs_get_surplus_hugepages (unsigned int numa_node,
+ int page_size, int *v);
+clib_error_t *vlib_sysfs_prealloc_hugepages (unsigned int numa_node,
+ int page_size, int nr);
+
+#endif /* included_linux_sysfs_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */