Combine all outstanding patches into one /big patch/

o  Added seek absolute option -- allows one to specify whether they want
   seek distances to be calculated based upon nearness to previous IO or
   from start to start.

o  Added block number dumping

o  Updated btt documentation for above.

o  Significant clean up of memory used and files opened. All allocated
   memory and opened files are cleaned up prior to normal program exit.

o  Fixed problem where Q & M traces were not being freed properly.

o  Fixed problem where bilink structures were not being freed properly.

o  Fixed omission -- output combined seeks in addition to read and
   write seeks.

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/btt/bno_dump.c b/btt/bno_dump.c
new file mode 100644
index 0000000..d1bc6ab
--- /dev/null
+++ b/btt/bno_dump.c
@@ -0,0 +1,92 @@
+/*
+ * blktrace output analysis: generate a timeline & gather statistics
+ *
+ * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include "globals.h"
+
+struct bno_dump {
+	FILE *rfp, *wfp, *cfp;
+};
+
+static struct file_info *bno_dump_files = NULL;
+
+static FILE *bno_dump_open(__u32 device, char rwc)
+{
+	FILE *fp;
+	char *oname;
+	int mjr, mnr;
+
+	mjr = device >> MINORBITS;
+	mnr = device & ((1 << MINORBITS) - 1);
+
+	oname = malloc(strlen(bno_dump_name) + 32);
+	sprintf(oname, "%s_%03d,%03d_%c.dat", bno_dump_name, mjr, mnr, rwc);
+	if ((fp = fopen(oname, "w")) == NULL)
+		perror(oname);
+	else
+		add_file(&bno_dump_files, fp, oname);
+	return fp;
+}
+
+void *bno_dump_init(__u32 device)
+{
+	struct bno_dump *bdp;
+
+	if (bno_dump_name == NULL) return NULL;
+
+	bdp = malloc(sizeof(*bdp));
+	bdp->rfp = bno_dump_open(device, 'r');
+	bdp->wfp = bno_dump_open(device, 'w');
+	bdp->cfp = bno_dump_open(device, 'c');
+
+	return bdp;
+}
+
+void bno_dump_exit(void *param)
+{
+	/*
+	 * Associated files will be auto-cleaned by bno_dump_clean
+	 */
+	free(param);
+}
+
+static inline void bno_dump_write(FILE *fp, struct io *iop)
+{
+	fprintf(fp, "%15.9lf %lld %lld\n",
+	        BIT_TIME(iop->t.time), 
+		(long long)BIT_START(iop), (long long)BIT_END(iop));
+}
+
+void bno_dump_add(void *handle, struct io *iop)
+{
+#	define RW_FP(bdp, iop)	(IOP_READ(iop) ? bdp->rfp : bdp->wfp)
+	struct bno_dump *bdp = handle;
+
+	if (bdp) {
+		if (RW_FP(bdp, iop))
+			bno_dump_write(RW_FP(bdp, iop), iop);
+		if (bdp->cfp)
+			bno_dump_write(bdp->cfp, iop);
+	}
+}
+
+void bno_dump_clean(void)
+{
+	clean_files(&bno_dump_files);
+}