#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/audit.h>
+#include <linux/capability.h>
#include <linux/ptrace.h>
#include <linux/seq_file.h>
#include "util.h"
-#define shm_flags shm_perm.mode
-
static struct file_operations shm_file_operations;
static struct vm_operations_struct shm_vm_ops;
shp->shm_dtim = get_seconds();
shp->shm_nattch--;
if(shp->shm_nattch == 0 &&
- shp->shm_flags & SHM_DEST)
+ shp->shm_perm.mode & SHM_DEST)
shm_destroy (shp);
else
shm_unlock(shp);
static int shm_mmap(struct file * file, struct vm_area_struct * vma)
{
- file_accessed(file);
- vma->vm_ops = &shm_vm_ops;
- shm_inc(file->f_dentry->d_inode->i_ino);
- return 0;
+ int ret;
+
+ ret = shmem_mmap(file, vma);
+ if (ret == 0) {
+ vma->vm_ops = &shm_vm_ops;
+ shm_inc(file->f_dentry->d_inode->i_ino);
+ }
+
+ return ret;
}
static struct file_operations shm_file_operations = {
- .mmap = shm_mmap
+ .mmap = shm_mmap,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = shmem_get_unmapped_area,
+#endif
};
static struct vm_operations_struct shm_vm_ops = {
return -ENOMEM;
shp->shm_perm.key = key;
- shp->shm_flags = (shmflg & S_IRWXUGO);
+ shp->shm_perm.mode = (shmflg & S_IRWXUGO);
shp->mlock_user = NULL;
shp->shm_perm.security = NULL;
file = hugetlb_zero_setup(size);
shp->mlock_user = current->user;
} else {
+ int acctflag = VM_ACCOUNT;
+ /*
+ * Do not allow no accounting for OVERCOMMIT_NEVER, even
+ * if it's asked for.
+ */
+ if ((shmflg & SHM_NORESERVE) &&
+ sysctl_overcommit_memory != OVERCOMMIT_NEVER)
+ acctflag = 0;
sprintf (name, "SYSV%08x", key);
- file = shmem_file_setup(name, size, VM_ACCOUNT);
+ file = shmem_file_setup(name, size, acctflag);
}
error = PTR_ERR(file);
if (IS_ERR(file))
shp->id = shm_buildid(id,shp->shm_perm.seq);
shp->shm_file = file;
file->f_dentry->d_inode->i_ino = shp->id;
- if (shmflg & SHM_HUGETLB)
- set_file_hugepages(file);
- else
+
+ /* Hugetlb ops would have already been assigned. */
+ if (!(shmflg & SHM_HUGETLB))
file->f_op = &shm_file_operations;
+
shm_tot += numpages;
shm_unlock(shp);
return shp->id;
out->uid = tbuf.shm_perm.uid;
out->gid = tbuf.shm_perm.gid;
- out->mode = tbuf.shm_flags;
+ out->mode = tbuf.shm_perm.mode;
return 0;
}
out->uid = tbuf_old.shm_perm.uid;
out->gid = tbuf_old.shm_perm.gid;
- out->mode = tbuf_old.shm_flags;
+ out->mode = tbuf_old.shm_perm.mode;
return 0;
}
if (!is_file_hugepages(shp->shm_file)) {
err = shmem_lock(shp->shm_file, 1, user);
if (!err) {
- shp->shm_flags |= SHM_LOCKED;
+ shp->shm_perm.mode |= SHM_LOCKED;
shp->mlock_user = user;
}
}
} else if (!is_file_hugepages(shp->shm_file)) {
shmem_lock(shp->shm_file, 0, shp->mlock_user);
- shp->shm_flags &= ~SHM_LOCKED;
+ shp->shm_perm.mode &= ~SHM_LOCKED;
shp->mlock_user = NULL;
}
shm_unlock(shp);
goto out_unlock_up;
if (shp->shm_nattch){
- shp->shm_flags |= SHM_DEST;
+ shp->shm_perm.mode |= SHM_DEST;
/* Do not find it any more */
shp->shm_perm.key = IPC_PRIVATE;
shm_unlock(shp);
shp->shm_perm.uid = setbuf.uid;
shp->shm_perm.gid = setbuf.gid;
- shp->shm_flags = (shp->shm_flags & ~S_IRWXUGO)
+ shp->shm_perm.mode = (shp->shm_perm.mode & ~S_IRWXUGO)
| (setbuf.mode & S_IRWXUGO);
shp->shm_ctim = get_seconds();
break;
BUG();
shp->shm_nattch--;
if(shp->shm_nattch == 0 &&
- shp->shm_flags & SHM_DEST)
+ shp->shm_perm.mode & SHM_DEST)
shm_destroy (shp);
else
shm_unlock(shp);
* could possibly have landed at. Also cast things to loff_t to
* prevent overflows and make comparisions vs. equal-width types.
*/
+ size = PAGE_ALIGN(size);
while (vma && (loff_t)(vma->vm_end - addr) <= size) {
next = vma->vm_next;
return seq_printf(s, format,
shp->shm_perm.key,
shp->id,
- shp->shm_flags,
+ shp->shm_perm.mode,
shp->shm_segsz,
shp->shm_cprid,
shp->shm_lprid,