* [PATCH v2 0/4] e2image -b option to pass superblock number
@ 2017-11-16 13:55 Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 1/4] ext2fs: opening filesystem code refactoring Artem Blagodarenko
` (3 more replies)
0 siblings, 4 replies; 9+ messages in thread
From: Artem Blagodarenko @ 2017-11-16 13:55 UTC (permalink / raw)
To: linux-ext4; +Cc: adilger.kernel
There was a discussion about possibility of using
superblock backup for creating images with e2image.
https://www.spinics.net/lists/linux-ext4/msg30583.html
Now our customer faced with situation then it would be
useful to have image file from partition with broken
superblock.
Here is set of patches that adds this functionality.
This is the second version of the patch set. Changes since v1:
* code style fixes
* moving common code to ext2fs_open2
* added "-B blocksize" option
* fixes in test script
Artem Blagodarenko (4):
ext2fs: opening filesystem code refactoring
e2image: add -b option to use supperblock backup
tests: add test for e2image -b option
man: add -b option to e2image
e2fsck/unix.c | 28 +++-------------------------
lib/ext2fs/openfs.c | 36 +++++++++++++++++++++++++++++++++++-
misc/dumpe2fs.c | 17 +++--------------
misc/e2image.8.in | 32 ++++++++++++++++++++++++++++++++
misc/e2image.c | 44 ++++++++++++++++++++++++++++++++++++++------
tests/i_zero_super/expect | 22 ++++++++++++++++++++++
tests/i_zero_super/image.gz | Bin 0 -> 13262 bytes
tests/i_zero_super/script | 33 +++++++++++++++++++++++++++++++++
8 files changed, 166 insertions(+), 46 deletions(-)
create mode 100644 tests/i_zero_super/expect
create mode 100644 tests/i_zero_super/image.gz
create mode 100644 tests/i_zero_super/script
--
2.13.6 (Apple Git-96)
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v2 1/4] ext2fs: opening filesystem code refactoring
2017-11-16 13:55 [PATCH v2 0/4] e2image -b option to pass superblock number Artem Blagodarenko
@ 2017-11-16 13:55 ` Artem Blagodarenko
2017-11-20 19:42 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 2/4] e2image: add -b option to use supperblock backup Artem Blagodarenko
` (2 subsequent siblings)
3 siblings, 1 reply; 9+ messages in thread
From: Artem Blagodarenko @ 2017-11-16 13:55 UTC (permalink / raw)
To: linux-ext4; +Cc: adilger.kernel, Artem Blagodarenko
From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
There are similar opening filesystem code in different utilities.
The patch moves this code to ext2fs_try_open_fs().
This function make one of the action based on parameters:
1) open filesystem with given superblock, superblock size
2) open filesystem with given superblock, but try to
find right block size
3) open filesystem with default superblock and block size
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
e2fsck/unix.c | 28 +++-------------------------
lib/ext2fs/ext2fs.h | 4 ++++
lib/ext2fs/openfs.c | 36 +++++++++++++++++++++++++++++++++++-
misc/dumpe2fs.c | 17 +++--------------
4 files changed, 45 insertions(+), 40 deletions(-)
diff --git a/e2fsck/unix.c b/e2fsck/unix.c
index b46dcb2d..2865f37a 100644
--- a/e2fsck/unix.c
+++ b/e2fsck/unix.c
@@ -1134,31 +1134,9 @@ static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
ext2_filsys *ret_fs)
{
errcode_t retval;
-
- *ret_fs = NULL;
- if (ctx->superblock && ctx->blocksize) {
- retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
- flags, ctx->superblock, ctx->blocksize,
- io_ptr, ret_fs);
- } else if (ctx->superblock) {
- int blocksize;
- for (blocksize = EXT2_MIN_BLOCK_SIZE;
- blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
- if (*ret_fs) {
- ext2fs_free(*ret_fs);
- *ret_fs = NULL;
- }
- retval = ext2fs_open2(ctx->filesystem_name,
- ctx->io_options, flags,
- ctx->superblock, blocksize,
- io_ptr, ret_fs);
- if (!retval)
- break;
- }
- } else
- retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
- flags, 0, 0, io_ptr, ret_fs);
-
+ retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
+ flags, ctx->superblock, ctx->blocksize,
+ io_ptr, ret_fs);
if (retval == 0) {
(*ret_fs)->priv_data = ctx;
e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 6774e32c..c394ec80 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1588,6 +1588,10 @@ extern errcode_t ext2fs_open2(const char *name, const char *io_options,
int flags, int superblock,
unsigned int block_size, io_manager manager,
ext2_filsys *ret_fs);
+extern errcode_t ext2fs_try_open_fs(char *filesystem_name, char *io_options,
+ blk64_t superblock, int blocksize, int flags,
+ io_manager io_ptr, ext2_filsys *ret_fs);
+
/*
* The dgrp_t argument to these two functions is not actually a group number
* but a block number offset within a group table! Convert with the formula
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index f74cd245..585ad766 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -108,7 +108,7 @@ errcode_t ext2fs_open(const char *name, int flags, int superblock,
* EXT2_FLAG_64BITS - Allow 64-bit bitfields (needed for large
* filesystems)
*/
-errcode_t ext2fs_open2(const char *name, const char *io_options,
+static errcode_t __ext2fs_open2(const char *name, const char *io_options,
int flags, int superblock,
unsigned int block_size, io_manager manager,
ext2_filsys *ret_fs)
@@ -497,6 +497,40 @@ cleanup:
return retval;
}
+errcode_t ext2fs_open2(const char *name, const char *io_options,
+ int flags, int superblock,
+ unsigned int block_size, io_manager manager,
+ ext2_filsys *ret_fs)
+{
+ errcode_t retval;
+
+ *ret_fs = NULL;
+ if (superblock && block_size) {
+ retval = __ext2fs_open2(name, io_options,
+ flags, superblock, block_size,
+ manager, ret_fs);
+ } else if (superblock) {
+ int block_size;
+
+ for (block_size = EXT2_MIN_BLOCK_SIZE;
+ block_size <= EXT2_MAX_BLOCK_SIZE; block_size *= 2) {
+ if (*ret_fs) {
+ ext2fs_free(*ret_fs);
+ *ret_fs = NULL;
+ }
+ retval = __ext2fs_open2(name,
+ io_options, flags,
+ superblock, block_size,
+ manager, ret_fs);
+ if (!retval)
+ break;
+ }
+ } else
+ retval = __ext2fs_open2(name, io_options,
+ flags, 0, 0, manager, ret_fs);
+ return retval;
+}
+
/*
* Set/get the filesystem data I/O channel.
*
diff --git a/misc/dumpe2fs.c b/misc/dumpe2fs.c
index 395ea9ee..6c4d7965 100644
--- a/misc/dumpe2fs.c
+++ b/misc/dumpe2fs.c
@@ -568,20 +568,9 @@ int main (int argc, char ** argv)
if (image_dump)
flags |= EXT2_FLAG_IMAGE_FILE;
try_open_again:
- if (use_superblock && !use_blocksize) {
- for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
- use_blocksize <= EXT2_MAX_BLOCK_SIZE;
- use_blocksize *= 2) {
- retval = ext2fs_open (device_name, flags,
- use_superblock,
- use_blocksize, unix_io_manager,
- &fs);
- if (!retval)
- break;
- }
- } else
- retval = ext2fs_open (device_name, flags, use_superblock,
- use_blocksize, unix_io_manager, &fs);
+ retval = ext2fs_open2(device_name, 0,
+ flags, use_superblock, use_blocksize,
+ unix_io_manager, &fs);
if (retval && !(flags & EXT2_FLAG_IGNORE_CSUM_ERRORS)) {
flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
goto try_open_again;
--
2.13.6 (Apple Git-96)
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2 2/4] e2image: add -b option to use supperblock backup
2017-11-16 13:55 [PATCH v2 0/4] e2image -b option to pass superblock number Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 1/4] ext2fs: opening filesystem code refactoring Artem Blagodarenko
@ 2017-11-16 13:55 ` Artem Blagodarenko
2017-11-20 19:45 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 3/4] tests: add test for e2image -b option Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 4/4] man: add -b option to e2image Artem Blagodarenko
3 siblings, 1 reply; 9+ messages in thread
From: Artem Blagodarenko @ 2017-11-16 13:55 UTC (permalink / raw)
To: linux-ext4; +Cc: adilger.kernel, Artem Blagodarenko
From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
e2image has no ability to use superblock backup to copy metadata.
This feature can be useful if someone wants to make partition
image and fix it using e2fsck utility.
New -b option allows to pass superblock number, like e2fsck utility do.
e2image doesn't change primary superblock and store is as is, so
it can be fixed using e2fsck latter.
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
lib/ext2fs/ext2fs.h | 4 ----
misc/e2image.c | 44 ++++++++++++++++++++++++++++++++++++++------
2 files changed, 38 insertions(+), 10 deletions(-)
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index c394ec80..6774e32c 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1588,10 +1588,6 @@ extern errcode_t ext2fs_open2(const char *name, const char *io_options,
int flags, int superblock,
unsigned int block_size, io_manager manager,
ext2_filsys *ret_fs);
-extern errcode_t ext2fs_try_open_fs(char *filesystem_name, char *io_options,
- blk64_t superblock, int blocksize, int flags,
- io_manager io_ptr, ext2_filsys *ret_fs);
-
/*
* The dgrp_t argument to these two functions is not actually a group number
* but a block number offset within a group table! Convert with the formula
diff --git a/misc/e2image.c b/misc/e2image.c
index be001f0f..756a1dbc 100644
--- a/misc/e2image.c
+++ b/misc/e2image.c
@@ -104,7 +104,8 @@ static int get_bits_from_size(size_t size)
static void usage(void)
{
- fprintf(stderr, _("Usage: %s [ -r|Q ] [ -fr ] device image-file\n"),
+ fprintf(stderr, _("Usage: %s [ -r|Q ] [ -b superblock ] [ -B blocksize]"
+ "[ -fr ] device image-file\n"),
program_name);
fprintf(stderr, _(" %s -I device image-file\n"), program_name);
fprintf(stderr, _(" %s -ra [ -cfnp ] [ -o src_offset ] "
@@ -1256,7 +1257,8 @@ static void output_qcow2_meta_data_blocks(ext2_filsys fs, int fd)
free_qcow2_image(img);
}
-static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags)
+static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags,
+ blk64_t superblock)
{
struct process_block_struct pb;
struct ext2_inode inode;
@@ -1284,6 +1286,22 @@ static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags)
}
}
+ if (superblock) {
+ int j;
+
+ ext2fs_mark_block_bitmap2(meta_block_map, superblock);
+ meta_blocks_count++;
+
+ /*
+ * Mark the backup superblock descriptors
+ */
+ for (j = 0; j < fs->desc_blocks; j++) {
+ ext2fs_mark_block_bitmap2(meta_block_map,
+ ext2fs_descriptor_block_loc2(fs, superblock, j));
+ }
+ meta_blocks_count += fs->desc_blocks;
+ }
+
mark_table_blocks(fs);
if (show_progress)
fprintf(stderr, "%s", _("Scanning inodes...\n"));
@@ -1463,6 +1481,8 @@ int main (int argc, char ** argv)
int ignore_rw_mount = 0;
int check = 0;
struct stat st;
+ blk64_t superblock = 0;
+ int blocksize = 0;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
@@ -1476,7 +1496,7 @@ int main (int argc, char ** argv)
if (argc && *argv)
program_name = *argv;
add_error_table(&et_ext2_error_table);
- while ((c = getopt(argc, argv, "nrsIQafo:O:pc")) != EOF)
+ while ((c = getopt(argc, argv, "nrsIQafo:O:pcb:B:")) != EOF)
switch (c) {
case 'I':
flags |= E2IMAGE_INSTALL_FLAG;
@@ -1515,6 +1535,12 @@ int main (int argc, char ** argv)
case 'c':
check = 1;
break;
+ case 'b':
+ superblock = strtoull(optarg, NULL, 0);
+ break;
+ case 'B':
+ blocksize = strtoul(optarg, NULL, 0);
+ break;
default:
usage();
}
@@ -1529,6 +1555,11 @@ int main (int argc, char ** argv)
"with raw or QCOW2 images."));
exit(1);
}
+ if (superblock && !img_type) {
+ com_err(program_name, 0, "%s", _("-b option can only be used "
+ "with raw or QCOW2 images."));
+ exit(1);
+ }
if ((source_offset || dest_offset) && img_type != E2IMAGE_RAW) {
com_err(program_name, 0, "%s",
_("Offsets are only allowed with raw images."));
@@ -1579,8 +1610,9 @@ int main (int argc, char ** argv)
}
}
sprintf(offset_opt, "offset=%llu", source_offset);
- retval = ext2fs_open2(device_name, offset_opt, open_flag, 0, 0,
- unix_io_manager, &fs);
+ retval = ext2fs_open2(device_name, offset_opt, open_flag,
+ superblock, blocksize, unix_io_manager,
+ &fs);
if (retval) {
com_err (program_name, retval, _("while trying to open %s"),
device_name);
@@ -1665,7 +1697,7 @@ skip_device:
exit(1);
}
if (img_type)
- write_raw_image_file(fs, fd, img_type, flags);
+ write_raw_image_file(fs, fd, img_type, flags, superblock);
else
write_image_file(fs, fd);
--
2.13.6 (Apple Git-96)
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2 3/4] tests: add test for e2image -b option
2017-11-16 13:55 [PATCH v2 0/4] e2image -b option to pass superblock number Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 1/4] ext2fs: opening filesystem code refactoring Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 2/4] e2image: add -b option to use supperblock backup Artem Blagodarenko
@ 2017-11-16 13:55 ` Artem Blagodarenko
2017-11-20 19:58 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 4/4] man: add -b option to e2image Artem Blagodarenko
3 siblings, 1 reply; 9+ messages in thread
From: Artem Blagodarenko @ 2017-11-16 13:55 UTC (permalink / raw)
To: linux-ext4; +Cc: adilger.kernel, Artem Blagodarenko
From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
The test makes raw image from partition with broken super block
and executes e2fsck.
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
tests/i_zero_super/expect | 22 ++++++++++++++++++++++
tests/i_zero_super/image.gz | Bin 0 -> 13262 bytes
tests/i_zero_super/script | 33 +++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/tests/i_zero_super/expect b/tests/i_zero_super/expect
new file mode 100644
index 00000000..863d6920
--- /dev/null
+++ b/tests/i_zero_super/expect
@@ -0,0 +1,22 @@
+test.img was not cleanly unmounted, check forced.
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+Free blocks count wrong for group #0 (7987, counted=7982).
+Fix? no
+
+Free blocks count wrong (11602, counted=11597).
+Fix? no
+
+Free inodes count wrong for group #0 (1493, counted=1488).
+Fix? no
+
+Free inodes count wrong (2997, counted=2992).
+Fix? no
+
+
+test.img: ********** WARNING: Filesystem still has errors **********
+
+test.img: 11/3008 files (0.0% non-contiguous), 398/12000 blocks
diff --git a/tests/i_zero_super/image.gz b/tests/i_zero_super/image.gz
new file mode 100644
index 0000000000000000000000000000000000000000..eea9140194f4dd9ec9dc8bb7b9e2215b950587d2
GIT binary patch
literal 13262
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literal 0
HcmV?d00001
diff --git a/tests/i_zero_super/script b/tests/i_zero_super/script
new file mode 100644
index 00000000..bb7fc4d1
--- /dev/null
+++ b/tests/i_zero_super/script
@@ -0,0 +1,33 @@
+if test -x $E2IMAGE_EXE; then
+
+IMAGE=$test_dir/image.gz
+FSCK_OPT=-fy
+OUT=$test_name.log
+EXP=$test_dir/expect
+
+> $OUT
+
+gzip -d < $IMAGE > $TMPFILE
+
+$E2IMAGE_EXE -r -b 8193 -B 1024 $TMPFILE $TMPFILE.raw
+$FSCK -n -b 8193 $TMPFILE.raw |\
+ sed -f $cmd_dir/filter.sed -e "s;$TMPFILE.raw;test.img;" > $OUT
+rm -f $TMPFILE $TMPFILE.raw $OUT.new
+
+cmp -s $OUT $EXP
+status=$?
+
+if [ "$status" = 0 ] ; then
+ echo "$test_name: $test_description: ok"
+ touch $test_name.ok
+else
+ echo "$test_name: $test_description: failed"
+ diff $EXP $OUT > $test_name.failed
+ rm -f $test_name.tmp
+fi
+
+unset IMAGE FSCK_OPT OUT EXP
+
+else
+ echo "$test_name: $test_description: skipped"
+fi
--
2.13.6 (Apple Git-96)
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2 4/4] man: add -b option to e2image
2017-11-16 13:55 [PATCH v2 0/4] e2image -b option to pass superblock number Artem Blagodarenko
` (2 preceding siblings ...)
2017-11-16 13:55 ` [PATCH v2 3/4] tests: add test for e2image -b option Artem Blagodarenko
@ 2017-11-16 13:55 ` Artem Blagodarenko
2017-11-20 19:59 ` Andreas Dilger
3 siblings, 1 reply; 9+ messages in thread
From: Artem Blagodarenko @ 2017-11-16 13:55 UTC (permalink / raw)
To: linux-ext4; +Cc: adilger.kernel, Artem Blagodarenko
From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
Add manual page for e2image -b option.
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
misc/e2image.8.in | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/misc/e2image.8.in b/misc/e2image.8.in
index f28a76ea..d6125bb4 100644
--- a/misc/e2image.8.in
+++ b/misc/e2image.8.in
@@ -11,6 +11,14 @@ e2image \- Save critical ext2/ext3/ext4 filesystem metadata to a file
.B \-r|Q
]
[
+.B \-b
+.I superblock
+]
+[
+.B \-B
+.I blocksize
+]
+[
.B \-fr
]
.I device
@@ -167,6 +175,22 @@ the
option will prevent analysis of problems related to hash-tree indexed
directories.
.PP
+Option
+.B \-b
+.I superblock
+can be used to get image from partition with broken primary superblock.
+The partition is copied as is including broken primary superblock.
+.PP
+Option
+.B \-B
+.I blocksize
+can be used to set superblock block size. Normally, e2fsck will search
+for the superblock at various different block sizes in an attempt to find
+the appropriate blocksize. This search can be fooled in some cases. This
+option forces e2fsck to only try locating the superblock at a particular
+blocksize. If the superblock is not found, e2fsck will terminate with a
+fatal error.
+.PP
Note that this will work even if you substitute "/dev/hda1" for another raw
disk image, or QCOW2 image previously created by
.BR e2image .
@@ -217,6 +241,14 @@ This can be useful to write a qcow2 image containing all data to a
sparse image file where it can be loop mounted, or to a disk partition.
Note that this may not work with qcow2 images not generated by e2image.
.PP
+Options
+.B \-b
+.I superblock
+and
+.B \-B
+.I blocksize
+can be used same way as for raw images.
+.PP
.SH INCLUDING DATA
Normally
.B e2image
--
2.13.6 (Apple Git-96)
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/4] ext2fs: opening filesystem code refactoring
2017-11-16 13:55 ` [PATCH v2 1/4] ext2fs: opening filesystem code refactoring Artem Blagodarenko
@ 2017-11-20 19:42 ` Andreas Dilger
0 siblings, 0 replies; 9+ messages in thread
From: Andreas Dilger @ 2017-11-20 19:42 UTC (permalink / raw)
To: Artem Blagodarenko; +Cc: linux-ext4, Artem Blagodarenko
[-- Attachment #1: Type: text/plain, Size: 3060 bytes --]
On Nov 16, 2017, at 6:55 AM, Artem Blagodarenko <artem.blagodarenko@gmail.com> wrote:
>
> From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
>
> There are similar opening filesystem code in different utilities.
>
> The patch moves this code to ext2fs_try_open_fs().
> This function make one of the action based on parameters:
> 1) open filesystem with given superblock, superblock size
> 2) open filesystem with given superblock, but try to
> find right block size
> 3) open filesystem with default superblock and block size
>
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
> ---
> e2fsck/unix.c | 28 +++-------------------------
> lib/ext2fs/ext2fs.h | 4 ++++
> lib/ext2fs/openfs.c | 36 +++++++++++++++++++++++++++++++++++-
> misc/dumpe2fs.c | 17 +++--------------
> 4 files changed, 45 insertions(+), 40 deletions(-)
>
> diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> index 6774e32c..c394ec80 100644
> --- a/lib/ext2fs/ext2fs.h
> +++ b/lib/ext2fs/ext2fs.h
> @@ -1588,6 +1588,10 @@ extern errcode_t ext2fs_open2(const char *name, const char *io_options,
> int flags, int superblock,
> unsigned int block_size, io_manager manager,
> ext2_filsys *ret_fs);
> +extern errcode_t ext2fs_try_open_fs(char *filesystem_name, char *io_options,
> + blk64_t superblock, int blocksize, int flags,
> + io_manager io_ptr, ext2_filsys *ret_fs);
This ext2fs_try_open_fs() function is declared here, but isn't added in this
patch. It is removed in the next patch, but should really have been removed
here instead.
> diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
> index f74cd245..585ad766 100644
> --- a/lib/ext2fs/openfs.c
> +++ b/lib/ext2fs/openfs.c
> @@ -497,6 +497,40 @@ cleanup:
> return retval;
> }
>
> +errcode_t ext2fs_open2(const char *name, const char *io_options,
> + int flags, int superblock,
> + unsigned int block_size, io_manager manager,
> + ext2_filsys *ret_fs)
> +{
> + errcode_t retval;
> +
> + *ret_fs = NULL;
> + if (superblock && block_size) {
> + retval = __ext2fs_open2(name, io_options,
> + flags, superblock, block_size,
> + manager, ret_fs);
> + } else if (superblock) {
> + int block_size;
> +
> + for (block_size = EXT2_MIN_BLOCK_SIZE;
> + block_size <= EXT2_MAX_BLOCK_SIZE; block_size *= 2) {
> + if (*ret_fs) {
> + ext2fs_free(*ret_fs);
> + *ret_fs = NULL;
> + }
> + retval = __ext2fs_open2(name,
> + io_options, flags,
> + superblock, block_size,
> + manager, ret_fs);
> + if (!retval)
> + break;
> + }
> + } else
> + retval = __ext2fs_open2(name, io_options,
> + flags, 0, 0, manager, ret_fs);
I still think it would be useful to automatically try to open the backup
superblocks, if no superblock number is specified. That could be done
in a separate patch.
In general, it looks like a good cleanup of the code.
Cheers, Andreas
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 2/4] e2image: add -b option to use supperblock backup
2017-11-16 13:55 ` [PATCH v2 2/4] e2image: add -b option to use supperblock backup Artem Blagodarenko
@ 2017-11-20 19:45 ` Andreas Dilger
0 siblings, 0 replies; 9+ messages in thread
From: Andreas Dilger @ 2017-11-20 19:45 UTC (permalink / raw)
To: Artem Blagodarenko; +Cc: linux-ext4, Artem Blagodarenko
[-- Attachment #1: Type: text/plain, Size: 4173 bytes --]
On Nov 16, 2017, at 6:55 AM, Artem Blagodarenko <artem.blagodarenko@gmail.com> wrote:
>
> From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
>
> e2image has no ability to use superblock backup to copy metadata.
> This feature can be useful if someone wants to make partition
> image and fix it using e2fsck utility.
>
> New -b option allows to pass superblock number, like e2fsck utility do.
> e2image doesn't change primary superblock and store is as is, so
> it can be fixed using e2fsck latter.
>
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
> ---
> lib/ext2fs/ext2fs.h | 4 ----
> misc/e2image.c | 44 ++++++++++++++++++++++++++++++++++++++------
> 2 files changed, 38 insertions(+), 10 deletions(-)
>
> diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> index c394ec80..6774e32c 100644
> --- a/lib/ext2fs/ext2fs.h
> +++ b/lib/ext2fs/ext2fs.h
> @@ -1588,10 +1588,6 @@ extern errcode_t ext2fs_open2(const char *name, const char *io_options,
> int flags, int superblock,
> unsigned int block_size, io_manager manager,
> ext2_filsys *ret_fs);
> -extern errcode_t ext2fs_try_open_fs(char *filesystem_name, char *io_options,
> - blk64_t superblock, int blocksize, int flags,
> - io_manager io_ptr, ext2_filsys *ret_fs);
> -
This should be part of the previous patch.
> /*
> * The dgrp_t argument to these two functions is not actually a group number
> * but a block number offset within a group table! Convert with the formula
> diff --git a/misc/e2image.c b/misc/e2image.c
> index be001f0f..756a1dbc 100644
> --- a/misc/e2image.c
> +++ b/misc/e2image.c
> @@ -104,7 +104,8 @@ static int get_bits_from_size(size_t size)
>
> static void usage(void)
> {
> - fprintf(stderr, _("Usage: %s [ -r|Q ] [ -fr ] device image-file\n"),
> + fprintf(stderr, _("Usage: %s [ -r|Q ] [ -b superblock ] [ -B blocksize]"
> + "[ -fr ] device image-file\n"),
> program_name);
> fprintf(stderr, _(" %s -I device image-file\n"), program_name);
> fprintf(stderr, _(" %s -ra [ -cfnp ] [ -o src_offset ] "
> @@ -1256,7 +1257,8 @@ static void output_qcow2_meta_data_blocks(ext2_filsys fs, int fd)
> free_qcow2_image(img);
> }
>
> -static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags)
> +static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags,
> + blk64_t superblock)
> {
> struct process_block_struct pb;
> struct ext2_inode inode;
> @@ -1284,6 +1286,22 @@ static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags)
> }
> }
>
> + if (superblock) {
> + int j;
> +
> + ext2fs_mark_block_bitmap2(meta_block_map, superblock);
> + meta_blocks_count++;
> +
> + /*
> + * Mark the backup superblock descriptors
> + */
> + for (j = 0; j < fs->desc_blocks; j++) {
> + ext2fs_mark_block_bitmap2(meta_block_map,
> + ext2fs_descriptor_block_loc2(fs, superblock, j));
> + }
> + meta_blocks_count += fs->desc_blocks;
> + }
> +
> mark_table_blocks(fs);
> if (show_progress)
> fprintf(stderr, "%s", _("Scanning inodes...\n"));
> @@ -1463,6 +1481,8 @@ int main (int argc, char ** argv)
> int ignore_rw_mount = 0;
> int check = 0;
> struct stat st;
> + blk64_t superblock = 0;
> + int blocksize = 0;
>
> #ifdef ENABLE_NLS
> setlocale(LC_MESSAGES, "");
> @@ -1476,7 +1496,7 @@ int main (int argc, char ** argv)
> if (argc && *argv)
> program_name = *argv;
> add_error_table(&et_ext2_error_table);
> - while ((c = getopt(argc, argv, "nrsIQafo:O:pc")) != EOF)
> + while ((c = getopt(argc, argv, "nrsIQafo:O:pcb:B:")) != EOF)
Options should preferably be in alphabetical order. Even if the others
are not, at least these could be added at the start.
> @@ -1515,6 +1535,12 @@ int main (int argc, char ** argv)
> case 'c':
> check = 1;
> break;
> + case 'b':
> + superblock = strtoull(optarg, NULL, 0);
> + break;
> + case 'B':
> + blocksize = strtoul(optarg, NULL, 0);
> + break;
These should also be listed first.
Looks good otherwise.
Cheers, Andreas
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 3/4] tests: add test for e2image -b option
2017-11-16 13:55 ` [PATCH v2 3/4] tests: add test for e2image -b option Artem Blagodarenko
@ 2017-11-20 19:58 ` Andreas Dilger
0 siblings, 0 replies; 9+ messages in thread
From: Andreas Dilger @ 2017-11-20 19:58 UTC (permalink / raw)
To: Artem Blagodarenko; +Cc: linux-ext4, Artem Blagodarenko
[-- Attachment #1: Type: text/plain, Size: 5241 bytes --]
On Nov 16, 2017, at 6:55 AM, Artem Blagodarenko <artem.blagodarenko@gmail.com> wrote:
>
> From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
>
> The test makes raw image from partition with broken super block
> and executes e2fsck.
>
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
> ---
> tests/i_zero_super/expect | 22 ++++++++++++++++++++++
> tests/i_zero_super/image.gz | Bin 0 -> 13262 bytes
> tests/i_zero_super/script | 33 +++++++++++++++++++++++++++++++++
> 3 files changed, 55 insertions(+)
>
> diff --git a/tests/i_zero_super/expect b/tests/i_zero_super/expect
> new file mode 100644
> index 00000000..863d6920
> --- /dev/null
> +++ b/tests/i_zero_super/expect
> @@ -0,0 +1,22 @@
> +test.img was not cleanly unmounted, check forced.
> +Pass 1: Checking inodes, blocks, and sizes
> +Pass 2: Checking directory structure
> +Pass 3: Checking directory connectivity
> +Pass 4: Checking reference counts
> +Pass 5: Checking group summary information
> +Free blocks count wrong for group #0 (7987, counted=7982).
> +Fix? no
> +
> +Free blocks count wrong (11602, counted=11597).
> +Fix? no
> +
> +Free inodes count wrong for group #0 (1493, counted=1488).
> +Fix? no
> +
> +Free inodes count wrong (2997, counted=2992).
> +Fix? no
> +
> +
> +test.img: ********** WARNING: Filesystem still has errors **********
> +
> +test.img: 11/3008 files (0.0% non-contiguous), 398/12000 blocks
> diff --git a/tests/i_zero_super/image.gz b/tests/i_zero_super/image.gz
> new file mode 100644
> index 0000000000000000000000000000000000000000..eea9140194f4dd9ec9dc8bb7b9e2215b950587d2
> GIT binary patch
> literal 13262
> zcmeI&{WsHl902f@Tih#ASFE<IL%5VllFHLfbsepcr#yxVS=!QEX3V<Xij3TH)g@2m
> zDS0T_=4nglT7;E{xfz>0G_ld9Vc5R+bpL^V>zwZSynpzd^M0St`F!5z^~3w8H;SqT
> zqYs|hy;?=Ydxb*`Y=(_Uj;z^->s>9@r^5EDn{U+Cn|rW>b}kfCoqXW-K~s(F;j74#
> zhqt?LGco2DyY?LC#w8Uk#19^?CI2?lfagqx1)ifG8HH6hag-M>b#n;a0ZPl9H5uQ*
> zh;IX^QFd*|QbjWJu&O+~X7%S}AV@xtYOvP)CS>1lrK);rafz~F03E!AP48O_FHJ-S
> zg=;|Z6CYQNv-ZtIAsw=E5_ROA?i#k~veE+)ipFdv$#ixO-jpJlhBw`i@Ze2U$ugXh
> zEMdbbDH0)^B6nzm#&w;gg^SRCFE9f3*C-V-jA$$~oJK~np*>kNW!_c@&xu+YHyNXN
> zp%GA9=BovWD%_K}kqu4M8l_Vdo`ZrjD`Rn~ny_y)f?E3F0+*`oZ`-HKopl65$&V?2
> z6t#B;?@_*MZBA_RXBf6G+|DYp-XhkO$YO6^T9V`5bn#K^+MJ~w%?yMSFJ^6Sg0UPo
> zH18)>^zs;IYTrH~YA<7Mr$64hU|~C{vPc@*cM^i?V|<|Jn9+tquql)qba_d&&!IrM
> zN~Zac^0PwabLqMD!9ml85Ia=TGE1p+3h@zX%O9$xRb*SWAT&w23469Mvy?^fd1|g3
> z2OBk4fRetx=bz*1p{n()`A%z>On+9V^<KoFScBS4+?9aD>5jQ%qmv|KEd9g7%{cya
> z65*HM6(OZ+6L>k!K_u1|@&p_klxX(aQxoxcuK2-5NAEJvycMqbFk(JtZeOq(eaVqK
> zE$C<*4!NVbAnmvsr0$0sDX)ZlCMriySRgmmUjO^tlevd#3)Zt$LqUQ_eDSM@rLm)g
> z!XAD=Sx#gZABPJ)Up{;GKD|C}Y8VkwAwFuhGbzSGG-0EPN6htOi;<%tBC<{2D7M<c
> zHgZ1}&X(q@H%g}2b?~jUzVP!H8P+O>Hvi^SK!zjPB6^PPltypW6U@ls8<!hHlm+Zo
> zhV@ue6ayjtKI3?=--?Te84ndnH!`e)6ZcO$@NXO<7^J3z)N8$XWIo%2ak^=WHQZ6I
> z@Q$yP_0qj<cs{(29;$C_Nk@Z?7kA3j_q<0a%gT$(DtpQ;?ZCRc%)YpelMq?#?(f$b
> z_UamTFN+X&iEQDYQcs_9B*mswP5Tz!>I$Qi8V+~~sMW&Avh1qk{jsdUms4q%_I~j9
> zAP1wBH!x%p{*lPf%!OjFcUM;S-X3L~(Ph>1KAIhBU*6R=9GDzLN>@M4QqZpW;86in
> zU6u2kydgWZ5!3%Mj+USKnvbny#tWU>-s*8m*m3AEb(yr<){ZABVq)XGI#2cz42~T&
> zGiMA2h%d5h8S#Z$(EIzA$Y}eQPcMd3koG%AZ~YY0O4M39@<xLdrBh?hKWLtF{hBCP
> zKSKVfKI(kvuk_4HnqI|OAvLr|+>qm%pxYt5T=-)((!SH_-N)wOT5EJu-k$_?OS4By
> z`-cNru4=m6(i&s&<}6`1-*Pu6zm4e05s8Xx>Q+>QMg+NP$urt|PT#~`t~3AhF_nSY
> zvBHEWF`>oD!xz}9ttUu?ntrBkM$M-%!q|)=)_Y)mo((>q^l>hC-8VW!K-)k72mk>f
> z00e*l5C8%|00;m9AOHk_01yBIKmZ5;0U!VbfB+Bx0zd!=00AKIbp=K!;yw%P>JwUP
> zN8Z$BYH3yUJBnz@L=EacMGN|;r>&TdDbac%hz*WE#2d70bXsDzshu_)m6AW|wjzkT
> zcBy>bZol}OTTD6WMU0ljJ&icy#4Kr$Hr@9)dvDXkMN4wZxwi50$>mD+G8Nh><%Z8z
> z-r_hsyIZ&rI57ThUe6tC!j|bV27G0o?8J#?hL{KkW#FoUb?d|b>Kwkeb>zx!KDuCK
> v`J3J9`63;-00e*l5C8%|00;m9AOHk_01yBI{~LklvK5${_ikI*<wn@Q%S-lK
>
> literal 0
> HcmV?d00001
>
> diff --git a/tests/i_zero_super/script b/tests/i_zero_super/script
> new file mode 100644
> index 00000000..bb7fc4d1
> --- /dev/null
> +++ b/tests/i_zero_super/script
> @@ -0,0 +1,33 @@
> +if test -x $E2IMAGE_EXE; then
> +
> +IMAGE=$test_dir/image.gz
> +FSCK_OPT=-fy
> +OUT=$test_name.log
> +EXP=$test_dir/expect
> +
> +> $OUT
> +
> +gzip -d < $IMAGE > $TMPFILE
> +
> +$E2IMAGE_EXE -r -b 8193 -B 1024 $TMPFILE $TMPFILE.raw
> +$FSCK -n -b 8193 $TMPFILE.raw |\
> + sed -f $cmd_dir/filter.sed -e "s;$TMPFILE.raw;test.img;" > $OUT
This should really use "run_e2fsck" to execute the test, instead of copying
a good chunk of that functionality here. That will also make it more
consistent with the other tests.
It looks like you would need to set:
ONE_PASS_ONLY=true
FSCK_OPT="-n -b 8193 -fy"
PREP_CMD="$E2IMAGE_EXE -r -b 8193 -B 1024 $TMPFILE $TMPFILE.raw; \
mv $TMPFILE.raw $TMPFILE"
> +rm -f $TMPFILE $TMPFILE.raw $OUT.new
> +
> +cmp -s $OUT $EXP
> +status=$?
> +
> +if [ "$status" = 0 ] ; then
> + echo "$test_name: $test_description: ok"
> + touch $test_name.ok
> +else
> + echo "$test_name: $test_description: failed"
> + diff $EXP $OUT > $test_name.failed
> + rm -f $test_name.tmp
> +fi
> +
> +unset IMAGE FSCK_OPT OUT EXP
> +
> +else
> + echo "$test_name: $test_description: skipped"
> +fi
> --
> 2.13.6 (Apple Git-96)
>
Cheers, Andreas
[-- Attachment #2: Message signed with OpenPGP --]
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 4/4] man: add -b option to e2image
2017-11-16 13:55 ` [PATCH v2 4/4] man: add -b option to e2image Artem Blagodarenko
@ 2017-11-20 19:59 ` Andreas Dilger
0 siblings, 0 replies; 9+ messages in thread
From: Andreas Dilger @ 2017-11-20 19:59 UTC (permalink / raw)
To: Artem Blagodarenko; +Cc: linux-ext4, Artem Blagodarenko
[-- Attachment #1: Type: text/plain, Size: 2306 bytes --]
On Nov 16, 2017, at 6:55 AM, Artem Blagodarenko <artem.blagodarenko@gmail.com> wrote:
>
> From: Artem Blagodarenko <artem.blagodarenko@seagate.com>
>
> Add manual page for e2image -b option.
>
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
Personally, I would include this into the patch that adds this option,
but it looks fine as-is.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
> ---
> misc/e2image.8.in | 32 ++++++++++++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
>
> diff --git a/misc/e2image.8.in b/misc/e2image.8.in
> index f28a76ea..d6125bb4 100644
> --- a/misc/e2image.8.in
> +++ b/misc/e2image.8.in
> @@ -11,6 +11,14 @@ e2image \- Save critical ext2/ext3/ext4 filesystem metadata to a file
> .B \-r|Q
> ]
> [
> +.B \-b
> +.I superblock
> +]
> +[
> +.B \-B
> +.I blocksize
> +]
> +[
> .B \-fr
> ]
> .I device
> @@ -167,6 +175,22 @@ the
> option will prevent analysis of problems related to hash-tree indexed
> directories.
> .PP
> +Option
> +.B \-b
> +.I superblock
> +can be used to get image from partition with broken primary superblock.
> +The partition is copied as is including broken primary superblock.
> +.PP
> +Option
> +.B \-B
> +.I blocksize
> +can be used to set superblock block size. Normally, e2fsck will search
> +for the superblock at various different block sizes in an attempt to find
> +the appropriate blocksize. This search can be fooled in some cases. This
> +option forces e2fsck to only try locating the superblock at a particular
> +blocksize. If the superblock is not found, e2fsck will terminate with a
> +fatal error.
> +.PP
> Note that this will work even if you substitute "/dev/hda1" for another raw
> disk image, or QCOW2 image previously created by
> .BR e2image .
> @@ -217,6 +241,14 @@ This can be useful to write a qcow2 image containing all data to a
> sparse image file where it can be loop mounted, or to a disk partition.
> Note that this may not work with qcow2 images not generated by e2image.
> .PP
> +Options
> +.B \-b
> +.I superblock
> +and
> +.B \-B
> +.I blocksize
> +can be used same way as for raw images.
> +.PP
> .SH INCLUDING DATA
> Normally
> .B e2image
> --
> 2.13.6 (Apple Git-96)
>
Cheers, Andreas
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^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2017-11-20 19:59 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-11-16 13:55 [PATCH v2 0/4] e2image -b option to pass superblock number Artem Blagodarenko
2017-11-16 13:55 ` [PATCH v2 1/4] ext2fs: opening filesystem code refactoring Artem Blagodarenko
2017-11-20 19:42 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 2/4] e2image: add -b option to use supperblock backup Artem Blagodarenko
2017-11-20 19:45 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 3/4] tests: add test for e2image -b option Artem Blagodarenko
2017-11-20 19:58 ` Andreas Dilger
2017-11-16 13:55 ` [PATCH v2 4/4] man: add -b option to e2image Artem Blagodarenko
2017-11-20 19:59 ` Andreas Dilger
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