From 464df1d5e5ab1322e2dd0a7796939fff1aeefa9a Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 17:49:25 +0200
Subject: Adding upstream version 1.47.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 debugfs/icheck.c | 176 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100644 debugfs/icheck.c

(limited to 'debugfs/icheck.c')

diff --git a/debugfs/icheck.c b/debugfs/icheck.c
new file mode 100644
index 0000000..ed6e950
--- /dev/null
+++ b/debugfs/icheck.c
@@ -0,0 +1,176 @@
+/*
+ * icheck.c --- given a list of blocks, generate a list of inodes
+ *
+ * Copyright (C) 1994 Theodore Ts'o.  This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <sys/types.h>
+
+#include "debugfs.h"
+
+struct block_info {
+	blk64_t		blk;
+	ext2_ino_t	ino;
+};
+
+struct block_walk_struct {
+	struct block_info	*barray;
+	e2_blkcnt_t		blocks_left;
+	e2_blkcnt_t		num_blocks;
+	ext2_ino_t		inode;
+};
+
+static int icheck_proc(ext2_filsys fs EXT2FS_ATTR((unused)),
+		       blk64_t	*block_nr,
+		       e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+		       blk64_t ref_block EXT2FS_ATTR((unused)),
+		       int ref_offset EXT2FS_ATTR((unused)),
+		       void *private)
+{
+	struct block_walk_struct *bw = (struct block_walk_struct *) private;
+	e2_blkcnt_t	i;
+
+	for (i=0; i < bw->num_blocks; i++) {
+		if (!bw->barray[i].ino && bw->barray[i].blk == *block_nr) {
+			bw->barray[i].ino = bw->inode;
+			bw->blocks_left--;
+		}
+	}
+	if (!bw->blocks_left)
+		return BLOCK_ABORT;
+
+	return 0;
+}
+
+void do_icheck(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+	       void *infop EXT2FS_ATTR((unused)))
+{
+	struct block_walk_struct bw;
+	struct block_info	*binfo;
+	int			i;
+	ext2_inode_scan		scan = 0;
+	ext2_ino_t		ino;
+	struct ext2_inode	inode;
+	errcode_t		retval;
+	char			*block_buf;
+
+	if (argc < 2) {
+		com_err(argv[0], 0, "Usage: icheck <block number> ...");
+		return;
+	}
+	if (check_fs_open(argv[0]))
+		return;
+
+	bw.barray = malloc(sizeof(struct block_info) * argc);
+	if (!bw.barray) {
+		com_err("icheck", ENOMEM,
+			"while allocating inode info array");
+		return;
+	}
+	memset(bw.barray, 0, sizeof(struct block_info) * argc);
+
+	block_buf = malloc(current_fs->blocksize * 3);
+	if (!block_buf) {
+		com_err("icheck", ENOMEM, "while allocating block buffer");
+		goto error_out;
+	}
+
+	for (i=1; i < argc; i++) {
+		if (strtoblk(argv[0], argv[i], NULL, &bw.barray[i-1].blk))
+			goto error_out;
+	}
+
+	bw.num_blocks = bw.blocks_left = argc-1;
+
+	retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
+	if (retval) {
+		com_err("icheck", retval, "while opening inode scan");
+		goto error_out;
+	}
+
+	do {
+		retval = ext2fs_get_next_inode(scan, &ino, &inode);
+	} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
+	if (retval) {
+		com_err("icheck", retval, "while starting inode scan");
+		goto error_out;
+	}
+
+	while (ino) {
+		blk64_t blk;
+
+		if (!inode.i_links_count)
+			goto next;
+
+		bw.inode = ino;
+
+		blk = ext2fs_file_acl_block(current_fs, &inode);
+		if (blk) {
+			icheck_proc(current_fs, &blk, 0,
+				    0, 0, &bw);
+			if (bw.blocks_left == 0)
+				break;
+			ext2fs_file_acl_block_set(current_fs, &inode, blk);
+		}
+
+		if (!ext2fs_inode_has_valid_blocks2(current_fs, &inode))
+			goto next;
+		/*
+		 * To handle filesystems touched by 0.3c extfs; can be
+		 * removed later.
+		 */
+		if (inode.i_dtime)
+			goto next;
+
+		retval = ext2fs_block_iterate3(current_fs, ino,
+					       BLOCK_FLAG_READ_ONLY, block_buf,
+					       icheck_proc, &bw);
+		if (retval) {
+			com_err("icheck", retval,
+				"while calling ext2fs_block_iterate");
+			goto next;
+		}
+
+		if (bw.blocks_left == 0)
+			break;
+
+	next:
+		do {
+			retval = ext2fs_get_next_inode(scan, &ino, &inode);
+		} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
+		if (retval) {
+			com_err("icheck", retval,
+				"while doing inode scan");
+			goto error_out;
+		}
+	}
+
+	printf("Block\tInode number\n");
+	for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
+		if (binfo->ino == 0) {
+			printf("%llu\t<block not found>\n",
+			       (unsigned long long) binfo->blk);
+			continue;
+		}
+		printf("%llu\t%u\n", (unsigned long long) binfo->blk,
+		       binfo->ino);
+	}
+
+error_out:
+	free(bw.barray);
+	free(block_buf);
+	if (scan)
+		ext2fs_close_inode_scan(scan);
+	return;
+}
-- 
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