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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/physmem.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/physmem.c')
-rw-r--r--src/vlib/linux/physmem.c192
1 files changed, 26 insertions, 166 deletions
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;
}