2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * pci.c: Linux user space PCI bus management.
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vlib/vlib.h>
41 #include <vlib/unix/unix.h>
43 #include <sys/types.h>
49 foreach_directory_file (char *dir_name,
50 clib_error_t * (*f) (void *arg, u8 * path_name,
51 u8 * file_name), void *arg,
56 clib_error_t *error = 0;
59 d = opendir (dir_name);
64 return clib_error_return_unix (0, "open `%s'", dir_name);
75 if (e->d_type == DT_DIR
76 && (!strcmp (e->d_name, ".") || !strcmp (e->d_name, "..")))
81 if (e->d_type == DT_DIR)
85 s = format (s, "%s/%s", dir_name, e->d_name);
86 t = format (t, "%s", e->d_name);
87 error = f (arg, s, t);
102 vlib_sysfs_write (char *file_name, char *fmt, ...)
106 clib_error_t *error = 0;
108 fd = open (file_name, O_WRONLY);
110 return clib_error_return_unix (0, "open `%s'", file_name);
114 s = va_format (0, fmt, &va);
117 if (write (fd, s, vec_len (s)) < 0)
118 error = clib_error_return_unix (0, "write `%s'", file_name);
126 vlib_sysfs_read (char *file_name, char *fmt, ...)
128 unformat_input_t input;
134 fd = open (file_name, O_RDONLY);
136 return clib_error_return_unix (0, "open `%s'", file_name);
138 vec_validate (s, 4095);
140 sz = read (fd, s, vec_len (s));
145 return clib_error_return_unix (0, "read `%s'", file_name);
149 unformat_init_vector (&input, s);
153 result = va_unformat (&input, fmt, &va);
160 return clib_error_return (0, "unformat error");
166 vlib_sysfs_link_to_name (char *link)
173 r = readlink (link, buffer, sizeof (buffer) - 1);
179 p = strrchr (buffer, '/');
184 unformat_init_string (&in, p + 1, strlen (p + 1));
185 if (unformat (&in, "%s", &s) != 1)
186 clib_unix_warning ("no string?");
193 vlib_sysfs_set_nr_hugepages (unsigned int numa_node, int page_size, int nr)
195 clib_error_t *error = 0;
199 p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
201 if (stat ((char *) p, &sb) == 0)
203 if (S_ISDIR (sb.st_mode) == 0)
205 error = clib_error_return (0, "'%s' is not directory", p);
209 else if (numa_node == 0)
211 vec_reset_length (p);
212 p = format (p, "/sys/kernel/mm%c", 0);
213 if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
215 error = clib_error_return (0, "'%s' does not exist or it is not "
222 error = clib_error_return (0, "'%s' does not exist", p);
227 p = format (p, "/hugepages/hugepages-%ukB/nr_hugepages%c", page_size, 0);
228 vlib_sysfs_write ((char *) p, "%d", nr);
236 static clib_error_t *
237 vlib_sysfs_get_xxx_hugepages (char *type, unsigned int numa_node,
238 int page_size, int *val)
240 clib_error_t *error = 0;
244 p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
246 if (stat ((char *) p, &sb) == 0)
248 if (S_ISDIR (sb.st_mode) == 0)
250 error = clib_error_return (0, "'%s' is not directory", p);
254 else if (numa_node == 0)
256 vec_reset_length (p);
257 p = format (p, "/sys/kernel/mm%c", 0);
258 if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
260 error = clib_error_return (0, "'%s' does not exist or it is not "
267 error = clib_error_return (0, "'%s' does not exist", p);
272 p = format (p, "/hugepages/hugepages-%ukB/%s_hugepages%c", page_size,
274 error = vlib_sysfs_read ((char *) p, "%d", val);
282 vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size, int *v)
284 return vlib_sysfs_get_xxx_hugepages ("free", numa_node, page_size, v);
288 vlib_sysfs_get_nr_hugepages (unsigned int numa_node, int page_size, int *v)
290 return vlib_sysfs_get_xxx_hugepages ("nr", numa_node, page_size, v);
294 vlib_sysfs_get_surplus_hugepages (unsigned int numa_node, int page_size,
297 return vlib_sysfs_get_xxx_hugepages ("surplus", numa_node, page_size, v);
301 vlib_sysfs_prealloc_hugepages (unsigned int numa_node, int page_size, int nr)
303 clib_error_t *error = 0;
305 error = vlib_sysfs_get_free_hugepages (numa_node, page_size, &n);
312 error = vlib_sysfs_get_nr_hugepages (numa_node, page_size, &n);
315 clib_warning ("pre-allocating %u additional %uK hugepages on numa node %u",
316 needed, page_size, numa_node);
317 return vlib_sysfs_set_nr_hugepages (numa_node, page_size, n + needed);
321 vlib_unix_recursive_mkdir (char *path)
323 clib_error_t *error = 0;
329 if (c && path[i] == '/')
332 if ((mkdir (c, 0755)) && (errno != EEXIST))
334 error = clib_error_return_unix (0, "mkdir '%s'", c);
339 vec_add1 (c, path[i]);
343 if ((mkdir (path, 0755)) && (errno != EEXIST))
345 error = clib_error_return_unix (0, "mkdir '%s'", path);
356 vlib_unix_validate_runtime_file (unix_main_t * um,
357 const char *path, u8 ** full_path)
360 char *last_slash = 0;
364 return clib_error_return (0, "path is an empty string");
366 else if (strncmp (path, "../", 3) == 0 || strstr (path, "/../"))
368 return clib_error_return (0, "'..' not allowed in runtime path");
370 else if (path[0] == '/')
372 /* Absolute path. Has to start with runtime directory */
373 if (strncmp ((char *) um->runtime_dir, path,
374 strlen ((char *) um->runtime_dir)))
376 return clib_error_return (0,
377 "file %s is not in runtime directory %s",
378 path, um->runtime_dir);
380 fp = format (0, "%s%c", path, '\0');
384 /* Relative path, just append to runtime */
385 fp = format (0, "%s/%s%c", um->runtime_dir, path, '\0');
388 /* We don't want to create a directory out of the last file */
389 if ((last_slash = strrchr ((char *) fp, '/')) != NULL)
392 clib_error_t *error = vlib_unix_recursive_mkdir ((char *) fp);
394 if (last_slash != NULL)
405 * fd.io coding-style-patch-verification: ON
408 * eval: (c-set-style "gnu")