[Ocfs2-tools-commits] mfasheh commits r288 - branches/dlm-changes/debugfs.ocfs2

[svn-commits at oss.oracle.com]

Author: mfasheh
Date: 2004-09-29 18:55:02 -0500 (Wed, 29 Sep 2004)
New Revision: 288

Modified:
   branches/dlm-changes/debugfs.ocfs2/commands.c
Log:
* add a command to debugfs to show an extent block by block number



Modified: branches/dlm-changes/debugfs.ocfs2/commands.c
===================================================================
--- branches/dlm-changes/debugfs.ocfs2/commands.c	2004-09-29 22:52:52 UTC (rev 287)
+++ branches/dlm-changes/debugfs.ocfs2/commands.c	2004-09-29 23:55:02 UTC (rev 288)
@@ -62,6 +62,7 @@
 static void do_vote (char **args);
 static void do_journal (char **args);
 static void do_group (char **args);
+static void do_header (char **args);
 
 extern gboolean allow_write;
 extern gboolean no_raw_bind;
@@ -121,7 +122,8 @@
 
   { "logdump", do_journal },
 
-  { "group", do_group }
+  { "group", do_group },
+  { "header", do_header }
 };
 
 
@@ -752,6 +754,65 @@
 }					/* do_group */
 
 /*
+ * do_header()
+ *
+ */
+static void do_header (char **args)
+{
+	char *opts = args[1];
+	ocfs2_extent_block *eb;
+	__u32 blknum;
+	char *buf = NULL;
+	__u32 buflen;
+	FILE *out;
+	__u64 off;
+
+	if (gbls.dev_fd == -1) {
+		printf ("device not open\n");
+		goto bail;
+	}
+
+	buflen = 1 << gbls.blksz_bits;
+	if (!(buf = memalign(buflen, buflen)))
+		DBGFS_FATAL("%s", strerror(errno));
+
+	if (!opts) {
+		printf("no block number specified\n");
+		goto bail;
+	}
+
+	blknum = atoi(opts);
+	if (blknum > gbls.max_blocks) {
+		printf("block number is too large\n");
+		goto bail;
+	}
+
+	off = blknum << gbls.blksz_bits;
+	if ((pread64 (gbls.dev_fd, buf, buflen, off)) == -1) {
+		printf("error reading block!\n");
+		goto bail;
+	}
+
+	out = open_pager();
+
+	eb = (ocfs2_extent_block *)buf;
+	if (memcmp(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE,
+		   sizeof(OCFS2_EXTENT_BLOCK_SIGNATURE))) {
+		printf("Not an extent block\n");
+		goto bail;
+	}
+
+	dump_extent_block(out, eb);
+	dump_extent_list(out, &eb->h_list);
+
+	close_pager (out);
+
+bail:
+	safefree (buf);
+	return ;
+}					/* do_header */
+
+/*
  * handle_signal()
  *
  */