check_f2fs: test wrong write(2) call
This patch adds a testcase to verify kernel has the below bug fix in f2fs.
f2fs: do not preallocate blocks which has wrong buffer
Bug: 77146255
Bug: 77344057
Change-Id: Ibc9077a334f335f42a65a79d546ac2eda918efa5
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
diff --git a/tools/check_f2fs.c b/tools/check_f2fs.c
index 65623bf..3d7cf21 100644
--- a/tools/check_f2fs.c
+++ b/tools/check_f2fs.c
@@ -24,6 +24,7 @@
#define DB1_PATH "/data/database_file1"
#define DB2_PATH "/sdcard/database_file2"
+#define FILE_PATH "/data/testfile"
#define BLOCK 4096
#define BLOCKS (2 * BLOCK)
@@ -82,6 +83,48 @@
return 0;
}
+static int test_bad_write_call(char *path)
+{
+ int fd, written;
+ struct stat sb;
+ int large_size = 1024 * 1024 * 100; /* 100 MB */
+
+ printf("\tOpen %s... \n", path);
+ fd = open(path, O_RDWR|O_CREAT|O_TRUNC, 0666);
+ if (fd < 0) {
+ printf("open failed errno:%d\n", errno);
+ return -1;
+ }
+
+ /* 8KB-sized buffer, but submit 100 MB size */
+ printf("\tWrite to the %dkB ... \n", BLOCKS / 1024);
+ written = write(fd, buf, large_size);
+ if (written != BLOCKS)
+ printf("Ok: write fail written:%d, errno:%d\n", written, errno);
+ close(fd);
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ printf("open failed errno:%d\n", errno);
+ return -1;
+ }
+
+ if (stat(path, &sb) == -1) {
+ printf("stat failed errno:%d\n", errno);
+ return -1;
+ }
+
+ if (sb.st_size / 512 != sb.st_blocks) {
+ printf("FAIL: Mismatch i_size and i_blocks: %lld %lld\n",
+ (long long)sb.st_size, (long long)sb.st_blocks);
+ printf("FAIL: missing patch "
+ "\"f2fs: do not preallocate blocks which has wrong buffer\"\n");
+ }
+ close(fd);
+ unlink(path);
+ return 0;
+}
+
int main(void)
{
memset(buf, 0xff, BLOCKS);
@@ -107,5 +150,9 @@
printf("# Test 3: Atomic_write on /sdcard\n");
if (test_atomic_write(DB2_PATH))
return -1;
+
+ printf("# Test 4: Bad write(2) call\n");
+ if (test_bad_write_call(FILE_PATH))
+ return -1;
return 0;
}
