#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 <linux/mutex.h>
#include <asm/uaccess.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: struct to free
*
- * It has to be called with shp and shm_ids.sem locked,
+ * It has to be called with shp and shm_ids.mutex locked,
* but returns with shp unlocked and freed.
*/
static void shm_destroy (struct shmid_kernel *shp)
int id = file->f_dentry->d_inode->i_ino;
struct shmid_kernel *shp;
- down (&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
/* remove from the list of attaches of the shm segment */
if(!(shp = shm_lock(id)))
BUG();
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);
- up (&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
}
static int shm_mmap(struct file * file, struct vm_area_struct * vma)
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;
struct shmid_kernel *shp;
int err, id = 0;
- down(&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
if (key == IPC_PRIVATE) {
err = newseg(key, shmflg, size);
} else if ((id = ipc_findkey(&shm_ids, key)) == -1) {
}
shm_unlock(shp);
}
- up(&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
return err;
}
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;
}
return err;
memset(&shm_info,0,sizeof(shm_info));
- down(&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
shm_info.used_ids = shm_ids.in_use;
shm_get_stat (&shm_info.shm_rss, &shm_info.shm_swp);
shm_info.shm_tot = shm_tot;
shm_info.swap_attempts = 0;
shm_info.swap_successes = 0;
err = shm_ids.max_id;
- up(&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
if(copy_to_user (buf, &shm_info, sizeof(shm_info))) {
err = -EFAULT;
goto out;
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);
* Instead we set a destroyed flag, and then blow
* the name away when the usage hits zero.
*/
- down(&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
shp = shm_lock(shmid);
err = -EINVAL;
if (shp == NULL)
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);
} else
shm_destroy (shp);
- up(&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
goto out;
}
err = -EFAULT;
goto out;
}
- if ((err = audit_ipc_perms(0, setbuf.uid, setbuf.gid, setbuf.mode)))
- return err;
- down(&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
shp = shm_lock(shmid);
err=-EINVAL;
if(shp==NULL)
goto out_up;
+ if ((err = audit_ipc_perms(0, setbuf.uid, setbuf.gid,
+ setbuf.mode, &(shp->shm_perm))))
+ goto out_unlock_up;
err = shm_checkid(shp,shmid);
if(err)
goto out_unlock_up;
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;
out_unlock_up:
shm_unlock(shp);
out_up:
- up(&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
goto out;
out_unlock:
shm_unlock(shp);
invalid:
up_write(¤t->mm->mmap_sem);
- down (&shm_ids.sem);
+ mutex_lock(&shm_ids.mutex);
if(!(shp = shm_lock(shmid)))
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);
- up (&shm_ids.sem);
+ mutex_unlock(&shm_ids.mutex);
*raddr = (unsigned long) user_addr;
err = 0;
loff_t size = 0;
int retval = -EINVAL;
+ if (addr & ~PAGE_MASK)
+ return retval;
+
down_write(&mm->mmap_sem);
/*
* 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,