From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm0-f66.google.com ([74.125.82.66]:36931 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753130AbdIGH0Q (ORCPT ); Thu, 7 Sep 2017 03:26:16 -0400 Received: by mail-wm0-f66.google.com with SMTP id f4so756042wmh.4 for ; Thu, 07 Sep 2017 00:26:15 -0700 (PDT) From: Amir Goldstein Subject: [PATCH v4 4/5] fsx: add support for writing constant instead of random data Date: Thu, 7 Sep 2017 10:26:37 +0300 Message-Id: <1504769198-4921-5-git-send-email-amir73il@gmail.com> In-Reply-To: <1504769198-4921-1-git-send-email-amir73il@gmail.com> References: <1504769198-4921-1-git-send-email-amir73il@gmail.com> Sender: fstests-owner@vger.kernel.org To: Eryu Guan Cc: fstests@vger.kernel.org List-ID: -g X: write character X instead of random generated data This is useful to compare holes between good and bad files because hexdump of good and bad files compacts the contigious ranges of X and zeroes. Signed-off-by: Amir Goldstein --- ltp/fsx.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/ltp/fsx.c b/ltp/fsx.c index 67d76dc..fd00962 100644 --- a/ltp/fsx.c +++ b/ltp/fsx.c @@ -133,6 +133,7 @@ unsigned long simulatedopcount = 0; /* -b flag */ int closeprob = 0; /* -c flag */ int debug = 0; /* -d flag */ unsigned long debugstart = 0; /* -D flag */ +char filldata = 0; /* -g flag */ int flush = 0; /* -f flag */ int do_fsync = 0; /* -y flag */ unsigned long maxfilelen = 256 * 1024; /* -l flag */ @@ -813,9 +814,13 @@ void gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size) { while (size--) { - good_buf[offset] = testcalls % 256; - if (offset % 2) - good_buf[offset] += original_buf[offset]; + if (filldata) { + good_buf[offset] = filldata; + } else { + good_buf[offset] = testcalls % 256; + if (offset % 2) + good_buf[offset] += original_buf[offset]; + } offset++; } } @@ -1630,11 +1635,12 @@ void usage(void) { fprintf(stdout, "usage: %s", - "fsx [-dnqxAFLOWZ] [-b opnum] [-c Prob] [-i logdev] [-j logid] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\ + "fsx [-dnqxAFLOWZ] [-b opnum] [-c Prob] [-g filldata] [-i logdev] [-j logid] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\ -b opnum: beginning operation number (default 1)\n\ -c P: 1 in P chance of file close+open at each op (default infinity)\n\ -d: debug output for all operations\n\ -f flush and invalidate cache after I/O\n\ + -g X: write character X instead of random generated data\n\ -i logdev: do integrity testing, logdev is the dm log writes device\n\ -j logid: prefix debug log messsages with this id\n\ -l flen: the upper bound on file size (default 262144)\n\ @@ -1872,7 +1878,7 @@ main(int argc, char **argv) setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */ while ((ch = getopt_long(argc, argv, - "b:c:dfi:j:l:m:no:p:qr:s:t:w:xyAD:FKHzCILN:OP:RS:WZ", + "b:c:dfg:i:j:l:m:no:p:qr:s:t:w:xyAD:FKHzCILN:OP:RS:WZ", longopts, NULL)) != EOF) switch (ch) { case 'b': @@ -1896,6 +1902,9 @@ main(int argc, char **argv) case 'f': flush = 1; break; + case 'g': + filldata = *optarg; + break; case 'i': integrity = 1; logdev = strdup(optarg); -- 2.7.4