+++ /dev/null
-/*
- * 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/unix/unix.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <dirent.h>
-
-clib_error_t *
-foreach_directory_file (char *dir_name,
- clib_error_t * (*f) (void *arg, u8 * path_name,
- u8 * file_name), void *arg,
- int scan_dirs)
-{
- DIR *d;
- struct dirent *e;
- clib_error_t *error = 0;
- u8 *s, *t;
-
- d = opendir (dir_name);
- if (!d)
- {
- if (errno == ENOENT)
- return 0;
- return clib_error_return_unix (0, "open `%s'", dir_name);
- }
-
- s = t = 0;
- while (1)
- {
- e = readdir (d);
- if (!e)
- break;
- if (scan_dirs)
- {
- if (e->d_type == DT_DIR
- && (!strcmp (e->d_name, ".") || !strcmp (e->d_name, "..")))
- continue;
- }
- else
- {
- if (e->d_type == DT_DIR)
- continue;
- }
-
- s = format (s, "%s/%s", dir_name, e->d_name);
- t = format (t, "%s", e->d_name);
- error = f (arg, s, t);
- _vec_len (s) = 0;
- _vec_len (t) = 0;
-
- if (error)
- break;
- }
-
- vec_free (s);
- closedir (d);
-
- return error;
-}
-
-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;
-}
-
-int
-vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size)
-{
- struct stat sb;
- u8 *p = 0;
- int r = -1;
-
- 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)
- 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)
- goto done;
- }
- else
- goto done;
-
- _vec_len (p) -= 1;
- p = format (p, "/hugepages/hugepages-%ukB/free_hugepages%c", page_size, 0);
- vlib_sysfs_read ((char *) p, "%d", &r);
-
-done:
- vec_free (p);
- return r;
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff