struct posix_acl *
zpl_get_acl(struct inode *ip, int type)
{
struct posix_acl *acl;
void *value = NULL;
char *name;
int size;
/*
* As of Linux 3.14, the kernel get_acl will check this for us.
* Also as of Linux 4.7, comparing against ACL_NOT_CACHED is wrong
* as the kernel get_acl will set it to temporary sentinel value.
*/
#ifndef HAVE_KERNEL_GET_ACL_HANDLE_CACHE
acl = get_cached_acl(ip, type);
if (acl != ACL_NOT_CACHED)
return (acl);
#endif
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return (ERR_PTR(-EINVAL));
}
size = zpl_xattr_get(ip, name, NULL, 0);
if (size > 0) {
value = kmem_alloc(size, KM_SLEEP);
size = zpl_xattr_get(ip, name, value, size);
}
if (size > 0) {
acl = zpl_acl_from_xattr(value, size);
} else if (size == -ENODATA || size == -ENOSYS) {
acl = NULL;
} else {
acl = ERR_PTR(-EIO);
}
if (size > 0)
kmem_free(value, size);
/* As of Linux 4.7, the kernel get_acl will set this for us */
#ifndef HAVE_KERNEL_GET_ACL_HANDLE_CACHE
if (!IS_ERR(acl))
zpl_set_cached_acl(ip, type, acl);
#endif
return (acl);
}
struct posix_acl *
zpl_get_acl(struct inode *ip, int type)
{
struct posix_acl *acl;
void *value = NULL;
char *name;
int size;
#ifdef HAVE_POSIX_ACL_CACHING
acl = get_cached_acl(ip, type);
if (acl != ACL_NOT_CACHED)
return (acl);
#endif /* HAVE_POSIX_ACL_CACHING */
switch (type) {
case ACL_TYPE_ACCESS:
name = POSIX_ACL_XATTR_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = POSIX_ACL_XATTR_DEFAULT;
break;
default:
return ERR_PTR(-EINVAL);
}
size = zpl_xattr_get(ip, name, NULL, 0);
if (size > 0) {
value = kmem_alloc(size, KM_PUSHPAGE);
size = zpl_xattr_get(ip, name, value, size);
}
if (size > 0) {
acl = zpl_acl_from_xattr(value, size);
} else if (size == -ENODATA || size == -ENOSYS) {
acl = NULL;
} else {
acl = ERR_PTR(-EIO);
}
if (size > 0)
kmem_free(value, size);
if (!IS_ERR(acl))
zpl_set_cached_acl(ip, type, acl);
return (acl);
}
static int
__zpl_xattr_security_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
if (strcmp(name, "") == 0)
return -EINVAL;
xattr_name = kmem_asprintf("%s%s", XATTR_SECURITY_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
static int
__zpl_xattr_security_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
/* xattr_resolve_name will do this for us if this is defined */
#ifndef HAVE_XATTR_HANDLER_NAME
if (strcmp(name, "") == 0)
return (-EINVAL);
#endif
xattr_name = kmem_asprintf("%s%s", XATTR_SECURITY_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
static int
__zpl_xattr_trusted_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (strcmp(name, "") == 0)
return -EINVAL;
xattr_name = kmem_asprintf("%s%s", XATTR_TRUSTED_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
static int
__zpl_xattr_user_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
if (strcmp(name, "") == 0)
return -EINVAL;
if (!(ITOZSB(ip)->z_flags & ZSB_XATTR))
return -EOPNOTSUPP;
xattr_name = kmem_asprintf("%s%s", XATTR_USER_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
static int
__zpl_xattr_trusted_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
if (!capable(CAP_SYS_ADMIN))
return (-EACCES);
/* xattr_resolve_name will do this for us if this is defined */
#ifndef HAVE_XATTR_HANDLER_NAME
if (strcmp(name, "") == 0)
return (-EINVAL);
#endif
xattr_name = kmem_asprintf("%s%s", XATTR_TRUSTED_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
static int
__zpl_xattr_user_get(struct inode *ip, const char *name,
void *value, size_t size)
{
char *xattr_name;
int error;
/* xattr_resolve_name will do this for us if this is defined */
#ifndef HAVE_XATTR_HANDLER_NAME
if (strcmp(name, "") == 0)
return (-EINVAL);
#endif
if (!(ITOZSB(ip)->z_flags & ZSB_XATTR))
return (-EOPNOTSUPP);
xattr_name = kmem_asprintf("%s%s", XATTR_USER_PREFIX, name);
error = zpl_xattr_get(ip, xattr_name, value, size);
strfree(xattr_name);
return (error);
}
