diff options
Diffstat (limited to 'source4/ntvfs/ntvfs_base.c')
| -rw-r--r-- | source4/ntvfs/ntvfs_base.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/source4/ntvfs/ntvfs_base.c b/source4/ntvfs/ntvfs_base.c index b1efb44ec7..1705bbef2f 100644 --- a/source4/ntvfs/ntvfs_base.c +++ b/source4/ntvfs/ntvfs_base.c @@ -98,21 +98,49 @@ _PUBLIC_ const struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntv This can be used by backends to either detect compilation errors, or provide multiple implementations for different smbd compilation options in one module */ -static const struct ntvfs_critical_sizes critical_sizes = { - .interface_version = NTVFS_INTERFACE_VERSION, - .sizeof_ntvfs_critical_sizes = sizeof(struct ntvfs_critical_sizes), - .sizeof_ntvfs_context = sizeof(struct ntvfs_context), - .sizeof_ntvfs_module_context = sizeof(struct ntvfs_module_context), - .sizeof_ntvfs_ops = sizeof(struct ntvfs_ops), - .sizeof_ntvfs_async_state = sizeof(struct ntvfs_async_state), - .sizeof_ntvfs_request = sizeof(struct ntvfs_request), -}; + +static const NTVFS_CURRENT_CRITICAL_SIZES(critical_sizes); _PUBLIC_ const struct ntvfs_critical_sizes *ntvfs_interface_version(void) { return &critical_sizes; } +_PUBLIC_ BOOL ntvfs_interface_differs(const struct ntvfs_critical_sizes *const iface) +{ + /* The comparison would be easier with memcmp, but compiler-interset + * alignment padding is not guaranteed to be zeroed. + */ + +#define FIELD_DIFFERS(field) (iface->field != critical_sizes.field) + + if (FIELD_DIFFERS(interface_version)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_critical_sizes)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_context)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_module_context)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_ops)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_async_state)) + return True; + + if (FIELD_DIFFERS(sizeof_ntvfs_request)) + return True; + + /* Versions match. */ + return False; + +#undef FIELD_DIFFERS +} + /* initialise a connection structure to point at a NTVFS backend |