static int jfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
{
char *ea_name;
struct jfs_inode_info *ji = JFS_IP(inode);
struct posix_acl **p_acl;
int rc;
int size = 0;
char *value = NULL;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
switch(type) {
case ACL_TYPE_ACCESS:
ea_name = XATTR_NAME_ACL_ACCESS;
p_acl = &ji->i_acl;
break;
case ACL_TYPE_DEFAULT:
ea_name = XATTR_NAME_ACL_DEFAULT;
p_acl = &ji->i_default_acl;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
default:
return -EINVAL;
}
if (acl) {
size = xattr_acl_size(acl->a_count);
value = kmalloc(size, GFP_KERNEL);
if (!value)
return -ENOMEM;
rc = posix_acl_to_xattr(acl, value, size);
if (rc < 0)
goto out;
}
rc = __jfs_setxattr(inode, ea_name, value, size, 0);
out:
if (value)
kfree(value);
if (!rc) {
if (*p_acl && (*p_acl != JFS_ACL_NOT_CACHED))
posix_acl_release(*p_acl);
*p_acl = posix_acl_dup(acl);
}
return rc;
}
/*
* Convert from in-memory to extended attribute representation.
*/
int
posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size)
{
xattr_acl_header *ext_acl = (xattr_acl_header *)buffer;
xattr_acl_entry *ext_entry = ext_acl->a_entries;
int real_size, n;
real_size = xattr_acl_size(acl->a_count);
if (!buffer)
return real_size;
if (real_size > size)
return -ERANGE;
ext_acl->a_version = cpu_to_le32(XATTR_ACL_VERSION);
for (n=0; n < acl->a_count; n++, ext_entry++) {
ext_entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
ext_entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
ext_entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
}
return real_size;
}
