bpf/prog_tests/ringbuf.c

93 	void *mmap_ptr, *tmp_ptr;
110 	mmap_ptr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, rb_fd, 0);
111 	ASSERT_OK_PTR(mmap_ptr, "rw_cons_pos");
112 	tmp_ptr = mremap(mmap_ptr, page_size, 2 * page_size, MREMAP_MAYMOVE);
115 	ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_EXEC), "exec_cons_pos_protect");
116 	ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_rw");
119 	mmap_ptr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, rb_fd, page_size);
121 	ASSERT_ERR_PTR(mmap_ptr, "wr_prod_pos");
125 	mmap_ptr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, rb_fd, 2 * page_size);
127 	ASSERT_ERR_PTR(mmap_ptr, "wr_data_page_one");
129 	mmap_ptr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, rb_fd, 3 * page_size);
130 	ASSERT_ERR_PTR(mmap_ptr, "wr_data_page_two");
131 	mmap_ptr = mmap(NULL, 2 * page_size, PROT_WRITE, MAP_SHARED, rb_fd, 2 * page_size);
132 	ASSERT_ERR_PTR(mmap_ptr, "wr_data_page_all");
135 	mmap_ptr = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED, rb_fd, 0);
136 	if (!ASSERT_OK_PTR(mmap_ptr, "ro_prod_pos"))
139 	ASSERT_ERR(mprotect(mmap_ptr, 4 * page_size, PROT_WRITE), "write_protect");
140 	ASSERT_ERR(mprotect(mmap_ptr, 4 * page_size, PROT_EXEC), "exec_protect");
141 	ASSERT_ERR_PTR(mremap(mmap_ptr, 0, 4 * page_size, MREMAP_MAYMOVE), "ro_remap");
142 	ASSERT_OK(munmap(mmap_ptr, 4 * page_size), "unmap_ro");
145 	mmap_ptr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, rb_fd, page_size);
146 	if (!ASSERT_OK_PTR(mmap_ptr, "ro_prod_pos"))
149 	ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_WRITE), "write_protect");
150 	ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_EXEC), "exec_protect");
151 	ASSERT_ERR_PTR(mremap(mmap_ptr, 0, 3 * page_size, MREMAP_MAYMOVE), "ro_remap");
152 	ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_ro");