#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
+
+uword
+clib_mem_get_page_size (void)
+{
+ return getpagesize ();
+}
+
+uword
+clib_mem_get_default_hugepage_size (void)
+{
+ unformat_input_t input;
+ static u32 size = 0;
+ int fd;
+
+ if (size)
+ goto done;
+
+ /*
+ * If the kernel doesn't support hugepages, /proc/meminfo won't
+ * say anything about it. Use the regular page size as a default.
+ */
+ size = clib_mem_get_page_size () / 1024;
+
+ if ((fd = open ("/proc/meminfo", 0)) == -1)
+ return 0;
+
+ unformat_init_clib_file (&input, fd);
+
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (&input, "Hugepagesize:%_%u kB", &size))
+ ;
+ else
+ unformat_skip_line (&input);
+ }
+ unformat_free (&input);
+ close (fd);
+done:
+ return 1024ULL * size;
+}
+
u64
-clib_mem_vm_get_page_size (int fd)
+clib_mem_get_fd_page_size (int fd)
{
struct stat st = { 0 };
if (fstat (fd, &st) == -1)
}
int
-clib_mem_vm_get_log2_page_size (int fd)
+clib_mem_get_fd_log2_page_size (int fd)
{
- return min_log2 (clib_mem_vm_get_page_size (fd));
+ return min_log2 (clib_mem_get_fd_page_size (fd));
}
void
else
bit_mask = 0;
- *requested_va += (clib_cpu_time_now () & bit_mask) * (1 << log2_page_size);
+ *requested_va +=
+ (clib_cpu_time_now () & bit_mask) * (1ull << log2_page_size);
+}
+
+#ifndef MFD_HUGETLB
+#define MFD_HUGETLB 0x0004U
+#endif
+
+clib_error_t *
+clib_mem_create_fd (char *name, int *fdp)
+{
+ int fd;
+
+ ASSERT (name);
+
+ if ((fd = memfd_create (name, MFD_ALLOW_SEALING)) == -1)
+ return clib_error_return_unix (0, "memfd_create");
+
+ if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
+ {
+ close (fd);
+ return clib_error_return_unix (0, "fcntl (F_ADD_SEALS)");
+ }
+
+ *fdp = fd;
+ return 0;
+}
+
+clib_error_t *
+clib_mem_create_hugetlb_fd (char *name, int *fdp)
+{
+ clib_error_t *err = 0;
+ int fd = -1;
+ static int memfd_hugetlb_supported = 1;
+ char *mount_dir;
+ char template[] = "/tmp/hugepage_mount.XXXXXX";
+ u8 *filename;
+
+ ASSERT (name);
+
+ if (memfd_hugetlb_supported)
+ {
+ if ((fd = memfd_create (name, MFD_HUGETLB)) != -1)
+ goto done;
+
+ /* avoid further tries if memfd MFD_HUGETLB is not supported */
+ if (errno == EINVAL && strnlen (name, 256) <= 249)
+ memfd_hugetlb_supported = 0;
+ }
+
+ mount_dir = mkdtemp (template);
+ if (mount_dir == 0)
+ return clib_error_return_unix (0, "mkdtemp \'%s\'", template);
+
+ if (mount ("none", (char *) mount_dir, "hugetlbfs", 0, NULL))
+ {
+ rmdir ((char *) mount_dir);
+ err = clib_error_return_unix (0, "mount hugetlb directory '%s'",
+ mount_dir);
+ }
+
+ filename = format (0, "%s/%s%c", mount_dir, name, 0);
+ fd = open ((char *) filename, O_CREAT | O_RDWR, 0755);
+ umount2 ((char *) mount_dir, MNT_DETACH);
+ rmdir ((char *) mount_dir);
+
+ if (fd == -1)
+ err = clib_error_return_unix (0, "open");
+
+done:
+ if (fd != -1)
+ fdp[0] = fd;
+ return err;
}
clib_error_t *
/* if hugepages are needed we need to create mount point */
if (a->flags & CLIB_MEM_VM_F_HUGETLB)
{
- char *mount_dir;
- char template[] = "/tmp/hugepage_mount.XXXXXX";
-
- mount_dir = mkdtemp (template);
- if (mount_dir == 0)
- return clib_error_return_unix (0, "mkdtemp \'%s\'", template);
-
- if (mount ("none", (char *) mount_dir, "hugetlbfs", 0, NULL))
- {
- rmdir ((char *) mount_dir);
- err = clib_error_return_unix (0, "mount hugetlb directory '%s'",
- mount_dir);
- goto error;
- }
-
- filename = format (0, "%s/%s%c", mount_dir, a->name, 0);
+ if ((err = clib_mem_create_hugetlb_fd (a->name, &fd)))
+ goto error;
- if ((fd = open ((char *) filename, O_CREAT | O_RDWR, 0755)) == -1)
- {
- umount2 ((char *) mount_dir, MNT_DETACH);
- rmdir ((char *) mount_dir);
- err = clib_error_return_unix (0, "open");
- goto error;
- }
- umount2 ((char *) mount_dir, MNT_DETACH);
- rmdir ((char *) mount_dir);
mmap_flags |= MAP_LOCKED;
}
else
{
- if ((fd = memfd_create (a->name, MFD_ALLOW_SEALING)) == -1)
- {
- err = clib_error_return_unix (0, "memfd_create");
- goto error;
- }
-
- if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
- {
- err = clib_error_return_unix (0, "fcntl (F_ADD_SEALS)");
- goto error;
- }
+ if ((err = clib_mem_create_fd (a->name, &fd)))
+ goto error;
}
- log2_page_size = clib_mem_vm_get_log2_page_size (fd);
+ log2_page_size = clib_mem_get_fd_log2_page_size (fd);
if (log2_page_size == 0)
{
err = clib_error_return_unix (0, "cannot determine page size");
if (a->flags & CLIB_MEM_VM_F_HUGETLB_PREALLOC)
{
- err = clib_sysfs_prealloc_hugepages (a->numa_node,
- 1 << (log2_page_size - 10),
+ err = clib_sysfs_prealloc_hugepages (a->numa_node, log2_page_size,
n_pages);
if (err)
goto error;
return err;
}
+void
+clib_mem_vm_ext_free (clib_mem_vm_alloc_t * a)
+{
+ if (a != 0)
+ {
+ clib_mem_vm_free (a->addr, 1ull << a->log2_page_size);
+ if (a->fd != -1)
+ close (a->fd);
+ }
+}
+
u64 *
clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages)
{
Code Review / vpp.git / blobdiff