vppinfra: add clib_mem_vm_ext_alloc function

Change-Id: Iff33694fc42cc3bcc73cf1372339053a6365039c
Signed-off-by: Damjan Marion <damarion@cisco.com>

5 files changed, 39 insertions, 530 deletions

diff --git a/src/vlib/linux/pci.c b/src/vlib/linux/pci.c
index 4ce19190531..790f168a355 100644
--- a/src/vlib/linux/pci.c
+++ b/src/vlib/linux/pci.c
@@ -37,10 +37,11 @@
  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#include <vppinfra/linux/sysfs.h>
+
 #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>
@@ -104,7 +105,7 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name)
 			     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);
+  driver_name = clib_sysfs_link_to_name ((char *) s);
   vec_reset_length (s);
 
   if (driver_name &&
@@ -183,32 +184,32 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name)
   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);
+  clib_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);
+      clib_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,
+      clib_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);
+  clib_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);
+      clib_sysfs_write ((char *) s, "%c", 0);
       vec_reset_length (s);
     }
 
@@ -602,28 +603,28 @@ scan_device (void *arg, u8 * dev_dir_name, u8 * ignored)
   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);
+  clib_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);
+  clib_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);
+  clib_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);
+  clib_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);
+  dev->driver_name = clib_sysfs_link_to_name ((char *) f);
 
 done:
   vec_free (f);
diff --git a/src/vlib/linux/physmem.c b/src/vlib/linux/physmem.c
index d8c5dc9b2f2..3cc42a0676d 100644
--- a/src/vlib/linux/physmem.c
+++ b/src/vlib/linux/physmem.c
@@ -43,14 +43,12 @@
 #include <sys/mman.h>
 #include <sys/fcntl.h>
 #include <sys/stat.h>
-#include <numa.h>
-#include <numaif.h>
 
+#include <vppinfra/linux/syscall.h>
+#include <vppinfra/linux/sysfs.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,
@@ -111,31 +109,6 @@ unix_physmem_free (vlib_main_t * vm, vlib_physmem_region_index_t idx, void *x)
   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,
@@ -144,13 +117,8 @@ unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
   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 ();
+  clib_mem_vm_alloc_t alloc = { 0 };
+
 
   if (geteuid () != 0 && (flags & VLIB_PHYSMEM_F_FAKE) == 0)
     return clib_error_return (0, "not allowed");
@@ -163,113 +131,32 @@ unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
       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)
-    {
-      if ((flags & VLIB_PHYSMEM_F_FAKE) == 0)
-	{
-	  error = clib_error_return_unix (0, "get_mempolicy");
-	  goto error;
-	}
-      else
-	old_mpol = -1;
-    }
+  alloc.name = name;
+  alloc.size = size;
+  alloc.numa_node = numa_node;
+  alloc.flags = CLIB_MEM_VM_F_SHARED;
 
   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;
+      alloc.flags |= CLIB_MEM_VM_F_HUGETLB;
+      alloc.flags |= CLIB_MEM_VM_F_HUGETLB_PREALLOC;
+      alloc.flags |= CLIB_MEM_VM_F_NUMA_FORCE;
     }
   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;
-    }
-
-  if (old_mpol != -1)
-    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;
+      alloc.flags |= CLIB_MEM_VM_F_NUMA_PREFER;
     }
 
-  if (old_mpol != -1 &&
-      set_mempolicy (old_mpol, old_mask->maskp, old_mask->size + 1) == -1)
-    {
-      error = clib_error_return_unix (0, "set_mempolicy");
-      goto error;
-    }
+  error = clib_mem_vm_ext_alloc (&alloc);
+  if (error)
+    goto error;
 
+  pr->index = pr - vpm->regions;
+  pr->flags = flags;
+  pr->fd = alloc.fd;
+  pr->mem = alloc.addr;
+  pr->log2_page_size = alloc.log2_page_size;
+  pr->n_pages = alloc.n_pages;
   pr->size = pr->n_pages << pr->log2_page_size;
   pr->page_mask = (1 << pr->log2_page_size) - 1;
   pr->numa_node = numa_node;
@@ -285,13 +172,14 @@ unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
 	  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);
+	      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;
 	    }
 	}
+      pr->page_table = clib_mem_vm_get_paddr (pr->mem, pr->log2_page_size,
+					      pr->n_pages);
     }
 
   if (flags & VLIB_PHYSMEM_F_INIT_MHEAP)
@@ -309,41 +197,13 @@ unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 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;
 }
 
diff --git a/src/vlib/linux/syscall.h b/src/vlib/linux/syscall.h
deleted file mode 100644
index 9e37997e8a9..00000000000
--- a/src/vlib/linux/syscall.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * 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
deleted file mode 100644
index f92f9ef564e..00000000000
--- a/src/vlib/linux/sysfs.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * 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
deleted file mode 100644
index 14b71317ffe..00000000000
--- a/src/vlib/linux/sysfs.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * 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:
- */