From: Robin Dong <sanbai@xxxxxxxxxx>
We need a tool to wreck filesystem to test e2fsck
Signed-off-by: Robin Dong <sanbai@xxxxxxxxxx>
---
misc/Makefile.in | 10 +-
misc/e2wreck.c | 549 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 611 insertions(+), 2 deletions(-)
create mode 100644 misc/e2wreck.c
diff --git a/misc/Makefile.in b/misc/Makefile.in
index cb3c6d9..c5597b4 100644
--- a/misc/Makefile.in
+++ b/misc/Makefile.in
@@ -26,7 +26,7 @@ INSTALL = @INSTALL@
@BLKID_CMT@FINDFS_LINK= findfs
@BLKID_CMT@FINDFS_MAN= findfs.8
-SPROGS= mke2fs badblocks tune2fs dumpe2fs $(BLKID_PROG) logsave \
+SPROGS= mke2fs badblocks tune2fs dumpe2fs e2wreck $(BLKID_PROG) logsave \
$(E2IMAGE_PROG) @FSCK_PROG@ e2undo
USPROGS= mklost+found filefrag e2freefrag $(UUIDD_PROG) $(E4DEFRAG_PROG)
SMANPAGES= tune2fs.8 mklost+found.8 mke2fs.8 dumpe2fs.8 badblocks.8 \
@@ -50,6 +50,7 @@ UUIDD_OBJS= uuidd.o
DUMPE2FS_OBJS= dumpe2fs.o
BADBLOCKS_OBJS= badblocks.o
E2IMAGE_OBJS= e2image.o
+E2WRECK_OBJS= e2wreck.o
FSCK_OBJS= fsck.o base_device.o ismounted.o
BLKID_OBJS= blkid.o
FILEFRAG_OBJS= filefrag.o
@@ -68,6 +69,7 @@ PROFILED_UUIDD_OBJS= profiled/uuidd.o
PROFILED_DUMPE2FS_OBJS= profiled/dumpe2fs.o
PROFILED_BADBLOCKS_OBJS= profiled/badblocks.o
PROFILED_E2IMAGE_OBJS= profiled/e2image.o
+PROFILED_E2WRECK_OBJS= profiled/e2wreck.o
PROFILED_FSCK_OBJS= profiled/fsck.o profiled/base_device.o \
profiled/ismounted.o
PROFILED_BLKID_OBJS= profiled/blkid.o
@@ -191,6 +193,10 @@ e2image.profiled: $(PROFILED_E2IMAGE_OBJS) $(PROFILED_DEPLIBS)
$(Q) $(CC) $(ALL_LDFLAGS) -g -pg -o e2image.profiled \
$(PROFILED_E2IMAGE_OBJS) $(PROFILED_LIBS) $(LIBINTL)
+e2wreck: $(E2WRECK_OBJS) $(DEPLIBS)
+ $(E) " LD $@"
+ $(Q) $(CC) $(ALL_LDFLAGS) -o e2wreck $(E2WRECK_OBJS) $(LIBS) $(LIBINTL)
+
e2undo: $(E2UNDO_OBJS) $(DEPLIBS)
$(E) " LD $@"
$(Q) $(CC) $(ALL_LDFLAGS) -o e2undo $(E2UNDO_OBJS) $(LIBS) $(LIBINTL)
@@ -556,7 +562,7 @@ clean:
$(FMANPAGES) profile.h \
base_device base_device.out mke2fs.static filefrag e2freefrag \
e2initrd_helper partinfo prof_err.[ch] default_profile.c \
- uuidd e2image tune2fs.static tst_ismounted fsck.profiled \
+ uuidd e2image e2wreck tune2fs.static tst_ismounted fsck.profiled \
blkid.profiled tune2fs.profiled e2image.profiled \
e2undo.profiled mke2fs.profiled dumpe2fs.profiled \
logsave.profiled filefrag.profiled uuidgen.profiled \
diff --git a/misc/e2wreck.c b/misc/e2wreck.c
new file mode 100644
index 0000000..2d7194b
--- /dev/null
+++ b/misc/e2wreck.c
@@ -0,0 +1,549 @@
+/*
+ * e2wreck.c --- Program which writes an image file backing up
+ * critical metadata for the filesystem.
+ *
+ * Copyright 2000, 2001 by Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#define _LARGEFILE_SOURCE
+#define _LARGEFILE64_SOURCE
+
+#include <fcntl.h>
+#include <grp.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+#endif
+#include <pwd.h>
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <assert.h>
+
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "et/com_err.h"
+#include "uuid/uuid.h"
+#include "e2p/e2p.h"
+
+#include "../version.h"
+#include "nls-enable.h"
+
+#define QCOW_OFLAG_COPIED (1LL << 63)
+
+const char *program_name = "e2wreck";
+
+static void wreck_file_block_bitmap(ext2_filsys fs, const char *name, int flag);
+static void wreck_dirent(ext2_filsys fs, const char *name, int flag);
+static void wreck_zero_inode(ext2_filsys fs, const char *name, int flag);
+static void wreck_inode_field(ext2_filsys fs, const char *name, int flag);
+
+#define DIRENT_ZERO_DIR 1
+#define DIRENT_DUP_DOT 2
+#define DIRENT_INVALID_DOTDOT 3
+#define DIRENT_INVALID_RECLEN 4
+
+#define INODE_GENERATION 1
+#define INODE_MODE 2
+#define INODE_LINKS 3
+#define INODE_DTIME 4
+#define INODE_BLOCK 5
+#define INODE_BLOCKS 6
+#define INODE_SIZE 7
+#define EXTENT_BLOCK 8
+#define EXTENT_LEN 9
+
+struct command {
+ char name[256];
+ void (*func) (ext2_filsys fs, const char *name, int flag);
+ int flag;
+};
+
+struct command cmd_table[] = { {
+ .name = "ZERO_INODE",
+ .func = wreck_zero_inode,
+ .flag = 0,
+ }, {
+ .name = "CLEAR_BITMAP",
+ .func = wreck_file_block_bitmap,
+ .flag = 0,
+ }, {
+ .name = "INODE_GENERATION",
+ .func = wreck_inode_field,
+ .flag = INODE_GENERATION,
+ }, {
+ .name = "INODE_MODE",
+ .func = wreck_inode_field,
+ .flag = INODE_MODE,
+ }, {
+ .name = "INODE_SIZE",
+ .func = wreck_inode_field,
+ .flag = INODE_SIZE,
+ }, {
+ .name = "INODE_LINKS",
+ .func = wreck_inode_field,
+ .flag = INODE_LINKS,
+ }, {
+ .name = "INODE_DTIME",
+ .func = wreck_inode_field,
+ .flag = INODE_DTIME,
+ }, {
+ .name = "INODE_BLOCK",
+ .func = wreck_inode_field,
+ .flag = INODE_BLOCK,
+ }, {
+ .name = "INODE_BLOCKS",
+ .func = wreck_inode_field,
+ .flag = INODE_BLOCKS,
+ }, {
+ .name = "EXTENT_BLOCK",
+ .func = wreck_inode_field,
+ .flag = EXTENT_BLOCK,
+ }, {
+ .name = "EXTENT_LEN",
+ .func = wreck_inode_field,
+ .flag = EXTENT_LEN,
+ }, {
+ .name = "DIRENT_ZERO_DIR",
+ .func = wreck_dirent,
+ .flag = DIRENT_ZERO_DIR,
+ }, {
+ .name = "DIRENT_DUP_DOT",
+ .func = wreck_dirent,
+ .flag = DIRENT_DUP_DOT,
+ }, {
+ .name = "DIRENT_INVALID_DOTDOT",
+ .func = wreck_dirent,
+ .flag = DIRENT_INVALID_DOTDOT,
+ }, {
+ .name = "DIRENT_INVALID_RECLEN",
+ .func = wreck_dirent,
+ .flag = DIRENT_INVALID_RECLEN,
+ }
+};
+
+struct link_struct {
+ const char *name;
+ int namelen;
+ ext2_ino_t inode;
+ int flags;
+ struct ext2_dir_entry *prev;
+ int done;
+};
+
+static void usage(void)
+{
+ int i;
+ fprintf(stderr, _("Usage: %s OPTION file_name device_name\n"),
+ program_name);
+ fprintf(stderr, _(" option:\n"));
+ for (i = 0; i < sizeof(cmd_table) / sizeof(struct command); i++)
+ fprintf(stderr, _("\t%s\n"), cmd_table[i].name);
+ exit(1);
+}
+
+/*
+ * This routine is used whenever a command needs to turn a string into
+ * an inode.
+ */
+static ext2_ino_t string_to_inode(ext2_filsys fs, const char *str)
+{
+ ext2_ino_t ino;
+ int len = strlen(str);
+ char *end;
+ int retval;
+
+ /*
+ * If the string is of the form <ino>, then treat it as an
+ * inode number.
+ */
+ if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) {
+ ino = strtoul(str+1, &end, 0);
+ if (*end == '>')
+ return ino;
+ }
+
+ retval = ext2fs_namei(fs, 2, 2, str, &ino);
+ if (retval) {
+ com_err(str, retval, 0);
+ return 0;
+ }
+ return ino;
+}
+
+#define DUMP_LEAF_EXTENTS 0x01
+#define DUMP_NODE_EXTENTS 0x02
+#define DUMP_EXTENT_TABLE 0x04
+
+static void dump_extents(ext2_filsys fs, FILE *f, const char *prefix,
+ ext2_ino_t ino, int flags,
+ int logical_width, int physical_width)
+{
+ ext2_extent_handle_t handle;
+ struct ext2fs_extent extent;
+ struct ext2_extent_info info;
+ int op = EXT2_EXTENT_ROOT;
+ errcode_t errcode;
+ blk64_t i;
+
+ errcode = ext2fs_extent_open(fs, ino, &handle);
+ if (errcode)
+ return;
+
+ while (1) {
+ errcode = ext2fs_extent_get(handle, op, &extent);
+
+ if (errcode)
+ break;
+
+ op = EXT2_EXTENT_NEXT;
+
+ if (extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)
+ continue;
+
+ if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
+ if ((flags & DUMP_LEAF_EXTENTS) == 0)
+ continue;
+ } else {
+ if ((flags & DUMP_NODE_EXTENTS) == 0)
+ continue;
+ }
+
+ errcode = ext2fs_extent_get_info(handle, &info);
+ if (errcode)
+ continue;
+
+ if (!(extent.e_flags & EXT2_EXTENT_FLAGS_LEAF)) {
+ if (extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)
+ continue;
+
+ continue;
+ }
+
+ if (extent.e_len == 0)
+ continue;
+
+ for (i = extent.e_lblk; i < extent.e_lblk + extent.e_len; i++) {
+ blk64_t b;
+ b = extent.e_pblk + i;
+ ext2fs_unmark_block_bitmap2(fs->block_map, b);
+ }
+ }
+}
+
+static void wreck_file_block_bitmap(ext2_filsys fs, const char *name, int flag)
+{
+ ext2_ino_t ino;
+ struct ext2_inode *inode_buf;
+ __u32 inode_size = EXT2_INODE_SIZE(fs->super);
+
+ inode_buf = (struct ext2_inode *) malloc(inode_size);
+ if (!inode_buf) {
+ printf("malloc inode_buf fail\n");
+ return;
+ }
+
+ ino = string_to_inode(fs, name);
+ if (!ino) {
+ printf("fetch inode fail\n");
+ return;
+ }
+
+ if (ext2fs_read_inode_full(fs, ino, inode_buf, inode_size)) {
+ printf("read inode fail\n");
+ goto out;
+ }
+
+ if (ext2fs_read_bitmaps(fs)) {
+ printf("read bitmap fail\n");
+ return;
+ }
+
+ dump_extents(fs, stdout, "{", ino, DUMP_LEAF_EXTENTS, 0, 0);
+ ext2fs_mark_bb_dirty(fs);
+
+ if (ext2fs_write_bitmaps(fs))
+ printf("write bitmap fail\n");
+
+out:
+ free(inode_buf);
+}
+
+static int clear_proc(struct ext2_dir_entry *dirent,
+ int offset,
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ dirent->inode = 0;
+
+ return DIRENT_CHANGED;
+}
+
+static int dup_proc(struct ext2_dir_entry *dirent,
+ int offset,
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct link_struct *ls = (struct link_struct *) priv_data;
+ struct ext2_dir_entry *prev;
+
+ prev = ls->prev;
+ ls->prev = dirent;
+
+ if ((dirent->name_len & 0xFF) == 2 &&
+ dirent->name[0] == '.' &&
+ dirent->name[1] == '.') {
+ dirent->name_len = 1;
+ return DIRENT_ABORT|DIRENT_CHANGED;
+ }
+ return 0;
+}
+
+static int invalid_dotdot_proc(struct ext2_dir_entry *dirent,
+ int offset,
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct link_struct *ls = (struct link_struct *) priv_data;
+ struct ext2_dir_entry *prev;
+
+ prev = ls->prev;
+ ls->prev = dirent;
+
+ if ((dirent->name_len & 0xFF) == 2 &&
+ dirent->name[0] == '.' &&
+ dirent->name[1] == '.') {
+ dirent->name[0] = 'a';
+ dirent->name[1] = 'b';
+ return DIRENT_ABORT|DIRENT_CHANGED;
+ }
+ return 0;
+}
+
+static int invalid_reclen_proc(struct ext2_dir_entry *dirent,
+ int offset,
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct link_struct *ls = (struct link_struct *) priv_data;
+ struct ext2_dir_entry *prev;
+
+ prev = ls->prev;
+ ls->prev = dirent;
+
+ if ((dirent->name_len & 0xFF) == 2 &&
+ dirent->name[0] == '1' &&
+ dirent->name[1] == '9') {
+ dirent->rec_len = 25;
+ return DIRENT_ABORT|DIRENT_CHANGED;
+ }
+ return 0;
+}
+
+static void wreck_dirent(ext2_filsys fs, const char *name, int flag)
+{
+ ext2_ino_t ino;
+ __u32 inode_size = EXT2_INODE_SIZE(fs->super);
+ struct link_struct ls;
+ int retval;
+
+ ino = string_to_inode(fs, name);
+ if (!ino) {
+ printf("fetch inode fail\n");
+ goto out;
+ }
+
+ switch (flag) {
+ case DIRENT_ZERO_DIR:
+ retval = ext2fs_dir_iterate(fs, ino,
+ DIRENT_FLAG_INCLUDE_EMPTY, 0, clear_proc, &ls);
+ case DIRENT_DUP_DOT:
+ retval = ext2fs_dir_iterate(fs, ino,
+ DIRENT_FLAG_INCLUDE_EMPTY, 0, dup_proc, &ls);
+ break;
+ case DIRENT_INVALID_DOTDOT:
+ retval = ext2fs_dir_iterate(fs, ino,
+ DIRENT_FLAG_INCLUDE_EMPTY, 0,
+ invalid_dotdot_proc, &ls);
+ break;
+ case DIRENT_INVALID_RECLEN:
+ retval = ext2fs_dir_iterate(fs, ino,
+ DIRENT_FLAG_INCLUDE_EMPTY, 0,
+ invalid_reclen_proc, &ls);
+ break;
+ default:
+ goto out;
+ }
+
+ if (retval) {
+ printf("iterate dir fail\n");
+ goto out;
+ }
+
+out:
+ return;
+}
+
+static void wreck_zero_inode(ext2_filsys fs, const char *name, int flag)
+{
+ ext2_ino_t ino;
+ struct ext2_inode *inode_buf;
+ __u32 inode_size = EXT2_INODE_SIZE(fs->super);
+
+ inode_buf = (struct ext2_inode *) malloc(inode_size);
+ if (!inode_buf) {
+ printf("malloc inode_buf fail\n");
+ return;
+ }
+
+ ino = string_to_inode(fs, name);
+ if (!ino) {
+ printf("fetch inode fail\n");
+ return;
+ }
+
+ memset(inode_buf, 0, inode_size);
+ if (ext2fs_write_inode_full(fs, ino, inode_buf, inode_size)) {
+ printf("write inode fail\n");
+ goto out;
+ }
+out:
+ free(inode_buf);
+}
+
+static void wreck_inode_field(ext2_filsys fs, const char *name, int field)
+{
+ ext2_ino_t ino;
+ struct ext2_inode *inode_buf;
+ struct ext3_extent *ex;
+ struct ext3_extent_header *eh;
+ __u32 inode_size = EXT2_INODE_SIZE(fs->super);
+ int i;
+
+ inode_buf = (struct ext2_inode *) malloc(inode_size);
+ if (!inode_buf) {
+ printf("malloc inode_buf fail\n");
+ return;
+ }
+
+ ino = string_to_inode(fs, name);
+ if (!ino) {
+ printf("fetch inode fail\n");
+ return;
+ }
+
+ if (ext2fs_read_inode_full(fs, ino, inode_buf,
+ sizeof(struct ext2_inode))) {
+ printf("read inode fail\n");
+ goto out;
+ }
+
+ switch (field) {
+ case INODE_GENERATION:
+ inode_buf->i_generation = 0;
+ break;
+ case INODE_MODE:
+ inode_buf->i_mode = 0;
+ break;
+ case INODE_LINKS:
+ inode_buf->i_links_count = 0;
+ break;
+ case INODE_DTIME:
+ inode_buf->i_dtime = 0;
+ break;
+ case INODE_BLOCK:
+ for (i = 0; i < EXT2_N_BLOCKS; i++)
+ inode_buf->i_block[i] = 0;
+ break;
+ case INODE_BLOCKS:
+ inode_buf->i_blocks = 0;
+ break;
+ case INODE_SIZE:
+ inode_buf->i_size = 0;
+ break;
+ case EXTENT_BLOCK:
+ eh = (struct ext3_extent_header *)(inode_buf->i_block);
+ ex = EXT_FIRST_EXTENT(eh);
+ ex->ee_block = 60;
+ break;
+ case EXTENT_LEN:
+ eh = (struct ext3_extent_header *)(inode_buf->i_block);
+ ex = EXT_FIRST_EXTENT(eh);
+ ex->ee_len = 60;
+ break;
+ default:
+ goto out;
+ }
+
+ if (ext2fs_write_inode_full(fs, ino, inode_buf, inode_size)) {
+ printf("write inode fail\n");
+ goto out;
+ }
+out:
+ free(inode_buf);
+}
+
+int main(int argc, char **argv)
+{
+ errcode_t retval;
+ ext2_filsys fs;
+ int open_flag = EXT2_FLAG_64BITS | EXT2_FLAG_RW | EXT2_FLAG_BB_DIRTY;
+ int ret = 0;
+ unsigned int i;
+
+#ifdef ENABLE_NLS
+ setlocale(LC_MESSAGES, "");
+ setlocale(LC_CTYPE, "");
+ bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
+ textdomain(NLS_CAT_NAME);
+#endif
+ fprintf(stderr, "e2wreck %s (%s)\n", E2FSPROGS_VERSION,
+ E2FSPROGS_DATE);
+ if (argc < 4) {
+ usage();
+ goto out;
+ }
+
+ if (argc && *argv)
+ program_name = *argv;
+
+ add_error_table(&et_ext2_error_table);
+
+ device_name = argv[3];
+
+ retval = ext2fs_open(device_name, open_flag, 0, 0,
+ unix_io_manager, &fs);
+ if (retval) {
+ com_err(program_name, retval, _("while trying to open %s"),
+ device_name);
+ fputs(_("Couldn't find valid filesystem superblock.\n"),
+ stdout);
+ exit(1);
+ }
+
+ for (i = 0; i < sizeof(cmd_table) / sizeof(struct command); i++)
+ if (!strcmp(cmd_table[i].name, argv[1]))
+ cmd_table[i].func(fs, argv[2], cmd_table[i].flag);
+
+ ext2fs_close(fs);
+out:
+ remove_error_table(&et_ext2_error_table);
+ return ret;
+}
--
1.7.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
