Implemented default ACL patch (set inherit acls = true on a per share basis).

Based on code donated by Olaf Fr�czyk <olaf@cbk.poznan.pl>. Further commit
will change to sending via vfs interface.
Jeremy.
(This used to be commit d85133e2697eb22f1573c78447b57791ae63dd6b)

source3/param/loadparm.c

@@ -387,6 +387,7 @@ typedef struct
 	BOOL bFakeDirCreateTimes;
 	BOOL bBlockingLocks;
 	BOOL bInheritPerms;
+	BOOL bInheritACLS;
 	BOOL bMSDfsRoot;
 	BOOL bUseClientDriver;
 	BOOL bDefaultDevmode;
@@ -502,6 +503,7 @@ static service sDefault = {
 	False,			/* bFakeDirCreateTimes */
 	True,			/* bBlockingLocks */
 	False,			/* bInheritPerms */
+	False,			/* bInheritACLS */
 	False,			/* bMSDfsRoot */
 	False,			/* bUseClientDriver */
 	False,			/* bDefaultDevmode */
@@ -752,6 +754,7 @@ static struct parm_struct parm_table[] = {
 	{"directory security mask", P_OCTAL, P_LOCAL, &sDefault.iDir_Security_mask, NULL, NULL, FLAG_GLOBAL | FLAG_SHARE},
 	{"force directory security mode", P_OCTAL, P_LOCAL, &sDefault.iDir_Security_force_mode, NULL, NULL, FLAG_GLOBAL | FLAG_SHARE},
 	{"inherit permissions", P_BOOL, P_LOCAL, &sDefault.bInheritPerms, NULL, NULL, FLAG_SHARE},
+	{"inherit acls", P_BOOL, P_LOCAL, &sDefault.bInheritACLS, NULL, NULL, FLAG_SHARE},
 	{"guest only", P_BOOL, P_LOCAL, &sDefault.bGuest_only, NULL, NULL, FLAG_SHARE},
 	{"only guest", P_BOOL, P_LOCAL, &sDefault.bGuest_only, NULL, NULL, 0},
 
@@ -1737,6 +1740,7 @@ FN_LOCAL_BOOL(lp_dos_filetime_resolution, bDosFiletimeResolution)
 FN_LOCAL_BOOL(lp_fake_dir_create_times, bFakeDirCreateTimes)
 FN_LOCAL_BOOL(lp_blocking_locks, bBlockingLocks)
 FN_LOCAL_BOOL(lp_inherit_perms, bInheritPerms)
+FN_LOCAL_BOOL(lp_inherit_acls, bInheritACLS)
 FN_LOCAL_BOOL(lp_use_client_driver, bUseClientDriver)
 FN_LOCAL_BOOL(lp_default_devmode, bDefaultDevmode)
 FN_LOCAL_BOOL(lp_nt_acl_support, bNTAclSupport)

source3/smbd/open.c

@@ -646,6 +646,7 @@ files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_
 	BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
 	BOOL file_existed = VALID_STAT(*psbuf);
 	BOOL fcbopen = False;
+	BOOL def_acl = False;
 	SMB_DEV_T dev = 0;
 	SMB_INO_T inode = 0;
 	int num_share_modes = 0;
@@ -800,6 +801,14 @@ flags=0x%X flags2=0x%X mode=0%o returned %d\n",
 		 */
 	}
 
+	/*
+	 * Ensure we pay attention to default ACLs on directories if required.
+	 */
+
+        if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
+			(def_acl = directory_has_default_acl(parent_dirname(fname))))
+                mode = 0777;
+
 	DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
 			flags,flags2,(int)mode));
 
@@ -951,10 +960,11 @@ flags=0x%X flags2=0x%X mode=0%o returned %d\n",
 	}
 	
 	/*
-	 * Take care of inherited ACLs on created files. JRA.
+	 * Take care of inherited ACLs on created files - if default ACL not
+	 * selected.
 	 */
 
-	if (!file_existed && (conn->vfs_ops.fchmod_acl != NULL)) {
+	if (!file_existed && !def_acl && (conn->vfs_ops.fchmod_acl != NULL)) {
 		int saved_errno = errno; /* We might get ENOSYS in the next call.. */
 		if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
 			errno = saved_errno; /* Ignore ENOSYS */

source3/smbd/posix_acls.c

@@ -2294,3 +2294,16 @@ int fchmod_acl(int fd, mode_t mode)
 	sys_acl_free_acl(posix_acl);
 	return ret;
 }
+
+BOOL directory_has_default_acl(const char *fname)
+{
+        SMB_ACL_T dir_acl = sys_acl_get_file( fname, SMB_ACL_TYPE_DEFAULT);
+        BOOL has_acl = False;
+        SMB_ACL_ENTRY_T entry;
+
+        if (dir_acl != NULL && (sys_acl_get_entry(dir_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1))
+                has_acl = True;
+
+        sys_acl_free_acl(dir_acl);
+        return has_acl;
+}

source3/smbd/vfs-wrap.c

@@ -95,6 +95,7 @@ struct dirent *vfswrap_readdir(connection_struct *conn, DIR *dirp)
 int vfswrap_mkdir(connection_struct *conn, const char *path, mode_t mode)
 {
 	int result;
+	BOOL has_dacl = False;
 
 	START_PROFILE(syscall_mkdir);
 
@@ -104,9 +105,12 @@ int vfswrap_mkdir(connection_struct *conn, const char *path, mode_t mode)
 	}
 #endif
 
+	if (lp_inherit_acls(SNUM(conn)) && (has_dacl = directory_has_default_acl(parent_dirname(path))))
+		mode = 0777;
+
 	result = mkdir(path, mode);
 
-	if (result == 0) {
+	if (result == 0 && !has_dacl) {
 		/*
 		 * We need to do this as the default behavior of POSIX ACLs	
 		 * is to set the mask to be the requested group permission