static int
ext2_xattr_security_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
value, size, flags);
}
static int
ext2_xattr_security_set(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int type)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_SECURITY, name,
value, size, flags);
}
static int
ext2_xattr_trusted_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ext2_xattr_set(inode, EXT2_XATTR_INDEX_TRUSTED, name,
value, size, flags);
}
void ext2_delete_from_parent(struct inode * inode)
{
int *value, *new_value, retval, count, *temp, *temp1;
unsigned long parent_ino;
struct inode * parent_inode;
// ext2_debug("%lu: Looking for parent\n", inode->i_ino);
retval = ext2_xattr_get(inode, 10, "parent", NULL, 0);
if(retval > 0)
{
// ext2_debug("%lu: retval > 0\n", inode->i_ino);
retval = ext2_xattr_get(inode, 10, "parent", &parent_ino, sizeof(unsigned long));
// ext2_debug("%lu: Found parent %lu\n", inode->i_ino, parent_ino);
parent_inode = iget(inode->i_sb, parent_ino);
if(!parent_inode)
return;
retval = ext2_xattr_get(parent_inode, 11, "children", NULL, 0);
if (retval > 0) {
value = (int *)kmalloc(retval, GFP_KERNEL);
new_value = (int *)kmalloc(retval, GFP_KERNEL);
temp = value;
temp1 = new_value;
retval = ext2_xattr_get(parent_inode, 11, "children", value, retval);
count = 0;
while(*value)
{
if(*value != (int)(inode->i_ino))
{
*new_value = *value;
new_value++;
count++;
}
else
{
// ext2_debug("%lu: deleting %d from parent list\n", parent_inode->i_ino, *value);
}
value++;
}
// ext2_debug("%lu: parent has %d children left\n", parent_inode->i_ino, count);
*new_value = 0;
ext2_xattr_set(parent_inode, 11, "children", temp1, (count+1)*sizeof(int), 0);
if(!count)
{
// delete inode
}
cleanup:
kfree(temp);
kfree(temp1);
iput(parent_inode); /* This should take care of dropping root when it has no children */
}
}
else
{
// ext2_debug("no parent found\n");
return;
}
}
static int
ext2_xattr_trusted_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name,
value, size, flags);
}
static int
ext2_xattr_user_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
if (strcmp(name, "") == 0)
return -EINVAL;
if (!test_opt(inode->i_sb, XATTR_USER))
return -EOPNOTSUPP;
return ext2_xattr_set(inode, EXT2_XATTR_INDEX_USER, name,
value, size, flags);
}
/*
* inode->i_mutex: down
*/
static int
ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
{
int name_index;
void *value = NULL;
size_t size = 0;
int error;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (!test_opt(inode->i_sb, POSIX_ACL))
return 0;
switch(type) {
case ACL_TYPE_ACCESS:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
if (acl) {
mode_t mode = inode->i_mode;
error = posix_acl_equiv_mode(acl, &mode);
if (error < 0)
return error;
else {
inode->i_mode = mode;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
if (error == 0)
acl = NULL;
}
}
break;
case ACL_TYPE_DEFAULT:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
default:
return -EINVAL;
}
if (acl) {
value = ext2_acl_to_disk(acl, &size);
if (IS_ERR(value))
return (int)PTR_ERR(value);
}
error = ext2_xattr_set(inode, name_index, "", value, size, 0);
kfree(value);
if (!error)
set_cached_acl(inode, type, acl);
return error;
}
static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
void *fs_info)
{
const struct xattr *xattr;
int err = 0;
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
xattr->name, xattr->value,
xattr->value_len, 0);
if (err < 0)
break;
}
return err;
}
/*
* inode->i_mutex: down
*/
int
ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int name_index;
void *value = NULL;
size_t size = 0;
int error;
switch(type) {
case ACL_TYPE_ACCESS:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
if (acl) {
error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
if (error)
return error;
inode->i_ctime = current_time(inode);
mark_inode_dirty(inode);
}
break;
case ACL_TYPE_DEFAULT:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
default:
return -EINVAL;
}
if (acl) {
value = ext2_acl_to_disk(acl, &size);
if (IS_ERR(value))
return (int)PTR_ERR(value);
}
error = ext2_xattr_set(inode, name_index, "", value, size, 0);
kfree(value);
if (!error)
set_cached_acl(inode, type, acl);
return error;
}
static int
ext2_xattr_user_set(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
int error;
if (strcmp(name, "") == 0)
return -EINVAL;
if (!test_opt(inode->i_sb, XATTR_USER))
return -EOPNOTSUPP;
if ( !S_ISREG(inode->i_mode) &&
(!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
return -EPERM;
error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
return ext2_xattr_set(inode, EXT2_XATTR_INDEX_USER, name,
value, size, flags);
}
int
ext2_init_security(struct inode *inode, struct inode *dir)
{
int err;
size_t len;
void *value;
char *name;
err = security_inode_init_security(inode, dir, &name, &value, &len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
name, value, len, 0);
kfree(name);
kfree(value);
return err;
}
/*
* inode->i_sem: down
*/
static int
ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
{
struct ext2_inode_info *ei = EXT2_I(inode);
int name_index;
void *value = NULL;
size_t size;
int error;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (!test_opt(inode->i_sb, POSIX_ACL))
return 0;
switch(type) {
case ACL_TYPE_ACCESS:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
if (acl) {
mode_t mode = inode->i_mode;
error = posix_acl_equiv_mode(acl, &mode);
if (error < 0)
return error;
else {
inode->i_mode = mode;
mark_inode_dirty(inode);
if (error == 0)
acl = NULL;
}
}
break;
case ACL_TYPE_DEFAULT:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
default:
return -EINVAL;
}
if (acl) {
if (acl->a_count > EXT2_ACL_MAX_ENTRIES)
return -EINVAL;
value = ext2_acl_to_disk(acl, &size);
if (IS_ERR(value))
return (int)PTR_ERR(value);
}
error = ext2_xattr_set(inode, name_index, "", value, size, 0);
if (value)
kfree(value);
if (!error) {
switch(type) {
case ACL_TYPE_ACCESS:
ext2_iset_acl(inode, &ei->i_acl, acl);
break;
case ACL_TYPE_DEFAULT:
ext2_iset_acl(inode, &ei->i_default_acl, acl);
break;
}
}
return error;
}
