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Message-ID: <20140718225236.31374.97509.stgit@birch.djwong.org>
Date: Fri, 18 Jul 2014 15:52:36 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: tytso@....edu, darrick.wong@...cle.com
Cc: linux-ext4@...r.kernel.org
Subject: [PATCH 03/24] debugfs: create idump command to dump an inode in hex
Create a command that will dump an entire inode's space in hex.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
debugfs/debug_cmds.ct | 4 ++++
debugfs/debugfs.c | 33 +++++++++++++++++++++++++++++++++
debugfs/debugfs.h | 1 +
debugfs/zap.c | 33 +++++++++++++++++++--------------
4 files changed, 57 insertions(+), 14 deletions(-)
diff --git a/debugfs/debug_cmds.ct b/debugfs/debug_cmds.ct
index 814fd52..9a66494 100644
--- a/debugfs/debug_cmds.ct
+++ b/debugfs/debug_cmds.ct
@@ -208,5 +208,9 @@ request do_list_quota, "List quota",
request do_get_quota, "Get quota",
get_quota, gq;
+request do_idump, "Dump inode",
+ idump;
+
+
end;
diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index 5eecabe..8078a02 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -1888,6 +1888,39 @@ void do_imap(int argc, char *argv[])
}
+void do_idump(int argc, char *argv[])
+{
+ ext2_ino_t ino;
+ char *buf;
+ errcode_t err;
+ int isize;
+
+ if (common_args_process(argc, argv, 2, 2, argv[0],
+ "<file>", 0))
+ return;
+ ino = string_to_inode(argv[1]);
+ if (!ino)
+ return;
+
+ isize = EXT2_INODE_SIZE(current_fs->super);
+ err = ext2fs_get_mem(isize, &buf);
+ if (err) {
+ com_err(argv[0], err, "while allocating memory");
+ return;
+ }
+
+ err = ext2fs_read_inode_full(current_fs, ino,
+ (struct ext2_inode *)buf, isize);
+ if (err) {
+ com_err(argv[0], err, "while reading inode %d", ino);
+ goto err;
+ }
+
+ do_byte_hexdump(stdout, buf, isize);
+err:
+ ext2fs_free_mem(&buf);
+}
+
#ifndef READ_ONLY
void do_set_current_time(int argc, char *argv[])
{
diff --git a/debugfs/debugfs.h b/debugfs/debugfs.h
index df51aa0..6eb5732 100644
--- a/debugfs/debugfs.h
+++ b/debugfs/debugfs.h
@@ -191,3 +191,4 @@ void do_list_xattr(int argc, char **argv);
/* zap.c */
extern void do_zap_block(int argc, char **argv);
extern void do_block_dump(int argc, char **argv);
+extern void do_byte_hexdump(FILE *fp, unsigned char *buf, size_t bufsize);
diff --git a/debugfs/zap.c b/debugfs/zap.c
index 8109209..917bddf 100644
--- a/debugfs/zap.c
+++ b/debugfs/zap.c
@@ -176,7 +176,6 @@ void do_block_dump(int argc, char *argv[])
char *file = NULL;
unsigned int i, j;
int c, err;
- int suppress = -1;
if (check_fs_open(argv[0]))
return;
@@ -229,11 +228,21 @@ void do_block_dump(int argc, char *argv[])
goto errout;
}
- for (i=0; i < current_fs->blocksize; i += 16) {
+ do_byte_hexdump(stdout, buf, current_fs->blocksize);
+errout:
+ free(buf);
+}
+
+void do_byte_hexdump(FILE *fp, unsigned char *buf, size_t bufsize)
+{
+ size_t i, j;
+ int suppress = -1;
+
+ for (i = 0; i < bufsize; i += 16) {
if (suppress < 0) {
if (i && memcmp(buf + i, buf + i - 16, 16) == 0) {
suppress = i;
- printf("*\n");
+ fprintf(fp, "*\n");
continue;
}
} else {
@@ -241,20 +250,16 @@ void do_block_dump(int argc, char *argv[])
continue;
suppress = -1;
}
- printf("%04o ", i);
+ fprintf(fp, "%04o ", (unsigned int)i);
for (j = 0; j < 16; j++) {
- printf("%02x", buf[i+j]);
+ fprintf(fp, "%02x", buf[i+j]);
if ((j % 2) == 1)
- putchar(' ');
+ fprintf(fp, " ");
}
- putchar(' ');
+ fprintf(fp, " ");
for (j = 0; j < 16; j++)
- printf("%c", isprint(buf[i+j]) ? buf[i+j] : '.');
- putchar('\n');
+ fprintf(fp, "%c", isprint(buf[i+j]) ? buf[i+j] : '.');
+ fprintf(fp, "\n");
}
- putchar('\n');
-
-errout:
- free(buf);
- return;
+ fprintf(fp, "\n");
}
--
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