#include <linux/mman.h>
#include <linux/mm.h>
+#include <linux/syscalls.h>
#include <linux/vs_memory.h>
goto out;
if (start != vma->vm_start) {
- if (split_vma(mm, vma, start, 1)) {
- ret = -EAGAIN;
+ ret = split_vma(mm, vma, start, 1);
+ if (ret)
goto out;
- }
}
if (end != vma->vm_end) {
- if (split_vma(mm, vma, end, 0)) {
- ret = -EAGAIN;
+ ret = split_vma(mm, vma, end, 0);
+ if (ret)
goto out;
- }
}
/*
pages = (end - start) >> PAGE_SHIFT;
if (newflags & VM_LOCKED) {
pages = -pages;
- ret = make_pages_present(start, end);
+ if (!(newflags & VM_IO))
+ ret = make_pages_present(start, end);
}
// vma->vm_mm->locked_vm -= pages;
vx_vmlocked_sub(vma->vm_mm, pages);
out:
+ if (ret == -ENOMEM)
+ ret = -EAGAIN;
return ret;
}
goto out;
locked = current->mm->locked_vm + grow;
- lock_limit = current->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
lock_limit >>= PAGE_SHIFT;
/* check against resource limits */
down_write(¤t->mm->mmap_sem);
- lock_limit = current->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
lock_limit >>= PAGE_SHIFT;
ret = -ENOMEM;
* Objects with different lifetime than processes (SHM_LOCK and SHM_HUGETLB
* shm segments) get accounted against the user_struct instead.
*/
-static spinlock_t shmlock_user_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(shmlock_user_lock);
int user_shm_lock(size_t size, struct user_struct *user)
{
unsigned long lock_limit, locked;
int allowed = 0;
- spin_lock(&shmlock_user_lock);
- locked = size >> PAGE_SHIFT;
- lock_limit = current->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ locked = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
lock_limit >>= PAGE_SHIFT;
+ spin_lock(&shmlock_user_lock);
if (locked + user->locked_shm > lock_limit && !capable(CAP_IPC_LOCK))
goto out;
get_uid(user);
void user_shm_unlock(size_t size, struct user_struct *user)
{
spin_lock(&shmlock_user_lock);
- user->locked_shm -= (size >> PAGE_SHIFT);
+ user->locked_shm -= (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
spin_unlock(&shmlock_user_lock);
free_uid(user);
}