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/*
* SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
const void __user * __user *, pages,
const int __user *, nodes,
int __user *, status, int, flags)
*/
#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform to mapping */
#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to mapping */
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include "arch.h"
#include "maps.h"
#include "random.h"
#include "sanitise.h"
#include "shm.h"
#include "syscall.h"
#include "trinity.h"
#include "utils.h"
static void sanitise_move_pages(struct syscallrecord *rec)
{
int *nodes;
unsigned long *page_alloc;
unsigned int i;
unsigned int count;
/* number of pages to move */
count = rnd() % (page_size / sizeof(void *));
count = max(1U, count);
rec->a2 = count;
/* setup array of ptrs to pages to move */
page_alloc = (unsigned long *) zmalloc(page_size);
for (i = 0; i < count; i++) {
struct map *map;
map = get_map();
page_alloc[i] = (unsigned long) map->ptr;
}
rec->a3 = (unsigned long) page_alloc;
/* nodes = array of ints specifying desired location for each page */
nodes = calloc(count, sizeof(int));
for (i = 0; i < count; i++)
nodes[i] = (int) RAND_BOOL();
rec->a4 = (unsigned long) nodes;
/* status = array of ints returning status of each page.*/
rec->a5 = (unsigned long) calloc(count, sizeof(int));
/* Needs CAP_SYS_NICE */
if (getuid() != 0)
rec->a6 &= ~MPOL_MF_MOVE_ALL;
}
static void post_move_pages(struct syscallrecord *rec)
{
freeptr(&rec->a3);
freeptr(&rec->a4);
freeptr(&rec->a5);
}
static unsigned long move_pages_flags[] = {
MPOL_MF_MOVE, MPOL_MF_MOVE_ALL,
};
struct syscallentry syscall_move_pages = {
.name = "move_pages",
.num_args = 6,
.arg1name = "pid",
.arg1type = ARG_PID,
.arg2name = "nr_pages",
.arg3name = "pages",
.arg4name = "nodes",
.arg5name = "status",
.arg6name = "flags",
.arg6type = ARG_LIST,
.arg6list = ARGLIST(move_pages_flags),
.group = GROUP_VM,
.sanitise = sanitise_move_pages,
.post = post_move_pages,
};
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