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authorDamjan Marion <damarion@cisco.com>2017-09-14 19:04:50 +0200
committerDave Barach <openvpp@barachs.net>2017-09-15 16:34:50 +0000
commit01914ce45729833cec88c65689de9a0336cd40cc (patch)
tree99068f85d2b7b4e55154706286ab629acc7e4ab6 /src/vlib/linux/sysfs.c
parentce41a5c8032ff581a56b990361a2368c879a7adf (diff)
vppinfra: add clib_mem_vm_ext_alloc function
Change-Id: Iff33694fc42cc3bcc73cf1372339053a6365039c Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/linux/sysfs.c')
-rw-r--r--src/vlib/linux/sysfs.c250
1 files changed, 0 insertions, 250 deletions
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:
- */