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2016-11-17Unify version string printingDavid Oberhollenzer
When a program does sophisticated enough command line processing (i.e. getopt), make sure it responds to -V and --version. When a program prints a version string, make sure it uses the common_print_version macro to print out its name, that it is part of mtd-utils and the mtd-utils version from the build system in a fashion similar to common program packages like the GNU coreutils. When a program responds to -V/--version or -h/--help, make sure it reports success exit status. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17Integrate tests into autotools build systemDavid Oberhollenzer
Add automake files for the test binaries. If configured to do so, install the test binaries to libexec/mtd-utils and use autoconf to fix the paths in the test scripts. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17Change build system to autotoolsRichard Weinberger
This patch is largely based on Richards original RFC. The major differences to the RFC patch are: - Add missing sumtools & mtdpart targets - Fix name of mkfs.jffs2 target - Add missing subdir-objects option for non-recursive make - Move all automake options to configure.ac - Add manpages to install target - Make XATTR & LZO support configurable - Install binaries to sbin directory like in the old build system - Install flash_erase wrapper script - Add files missing from distribution target Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-11-17Remove duplicate copies of GPLv2 license textDavid Oberhollenzer
Some of the programs in the mtd-utils used to be seperate packages that were at some point merged into mtd-utils. As a result, some subdirectories contain their own README and COPYING files with copies of the GPLv2 license text. Since those programs are now part of mtd-utils that contains a copy of the GPLv2 in the file COPYING in the package root directory, those extra files can be removed, as there is no need for distributing an extra copy of the license text for each individual program in the bundle. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-08-25fs-tests: integrity: don't include header <bits/stdio_lim.h>Rahul Bedarkar
In commit ca7a5eda221d("integck.c: Fix buffer overflow in save_file") we started including header <bits/stdio_lim.h>. But with musl C library, we get following build error integck.c:37:28: fatal error: bits/stdio_lim.h: No such file or directory #include <bits/stdio_lim.h> ^ compilation terminated. make[2]: *** [integck] Error 1 Header <bits/stdio_lim.h> is not available in musl C library. However <stdio.h> has all definition that <bits/stdio_lim.h> supposed to be providing. Moreover <bits/stdio_lim.h> shouldn't be included directly instead we should be using <stdio.h>. Since we already include <stdio.h> and in case of uClibc or glibc <bits/stdio_lim.h> gets included internally, we can safely remove it. This build issue is found by Buildroot autobuilder http://autobuild.buildroot.net/results/175/1754861457af520480cc34d7d2d0edff2868ff66/ Fixes: ca7a5eda221d("integck.c: Fix buffer overflow in save_file") Signed-off-by: Rahul Bedarkar <rahul.bedarkar@imgtec.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-09-29mtd: tests: Fix endian issue with CRC generation algorithmPaul McGougan
The calculation of the CRC in /tests/checkfs/makefiles.c was writing the CRC Into the produced files in host byte-order which would cause CRC validation to fail on big-endian systems as the validation is performed bytewise. Signed-off-by: Paul McGougan <pmcgougan AT topcon.com> [Brian: add endian.h] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-07-06mtd-utils: fix 'new blank line at EOF' problemsDongsheng Yang
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-07-06mtd-utils: fix the trailing whitespace problemsDongsheng Yang
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-07-06mtd-utils: ubi-tests: fix a some overflowsDongsheng Yang
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-07-06mtd-utils: fs-tests: pass TEST_DIR to integck in run_all.shDongsheng Yang
Test integck requires a parameter but run_all.sh did no pass any to it. Then: integck: error!: test file-system was not specified (use -h for help) Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-04-15mtd-utils: integck: Use $(CC) and $(AR) instead of 'gcc' and 'ar' consistentlyMats Kärrman
Not using the macros may be a problem when cross-compiling. Signed-off-by: Mats Karrman <mats.karrman@tritech.se> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-03-11integck: fix identation a bitArtem Bityutskiy
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-03-11integck.c: Fix buffer overflow in save_fileElie De Brauwer
In the problem above I've spend several hours waiting for the issue to appear, only to had the 'luck' that it was found in a file whose name was 256 bytes in length, resulting in the write to fail. Closer examination showed that the buffer to store the path was 256 bytes in length, but this buffer also includes /tmp and the read/write suffix and should be able to contain a filename which is up to 255 bytes (NAME_MAX in linux/limits.h) in size which is a bad fit. So that array is modified to FILENAME_MAX (stdio_lim.h) and some checking is added to truncate the filename should it cause an overflow. The following log shows the first patch in action (see the correct seed), and shows why this third patch is needed: <quote> integck:     File Data: integck:         Offset: 0  Size: 1  Seed: 5008310  R.Off: 0 integck:     1 writes integck:     ============================================ integck:     Write Info: integck:         Offset: 0  Size: 1  Seed: 5008310  R.Off: 0 integck:         Offset: 0  Size: 1  Seed: 8246352  R.Off: 0 integck:         Offset: 0  Size: 1  Seed: 5078796  R.Off: 0 integck:         Offset: 0  Size: 1  Seed: 2267087  R.Off: 0 integck:         Offset: 0  Size: 1  Seed: 3602680  R.Off: 0 integck:     5 writes or truncations integck:     ============================================ integck: Saving /tmp/yqcnfygfitaatyeyvffrguegcdttamcnyhowhgieljfuxfipiljsjcbluaeaghwyinkggommsbwnmvekihgnwgiibccpbwfrpxuxwkmnyghnutrudienngxwgorudbskedaaekiuiyqksfazrwzfwbfhzjjqoiulebtlpbfiuffmsnguqkjzqjqizimsmhbqqagaebjdhqwmzdxghiavtcxubegawlgtvstuqurkurpnrckjfkgostdtpg.integ.sav.readn integck: error!: condition 'w_fd != -1' failed in save_file() at integck.c:1445 integck: error 36 (File name too long) </quote> Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-03-11integck.c: rework file_check_data to immediately dump the buffer containing ↵Elie De Brauwer
the errors See my problem description int the previous commit, the point is that integck in file_check_data reads a buffer, and then checks if the data is correct,  it will do a seek(0), and reread from the same fd. The point is that in the scenario I observed integck failed (due to a buffer mismatch) but the it saved (and what was in flash) was actually correct. So I modified this function to dump the buffers to stderr at the moment an error is found. Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-03-11integck.c: Only verify the operation after all datastructures have been updatedElie De Brauwer
<quote> integck: File Data: integck: Offset: 0 Size: 196 Seed: 5999877 R.Off: 0 integck: Offset: 196 Size: 33 Seed: 4160795 R.Off: 0 integck: Offset: 229 Size: 1252 Seed: 8070052 R.Off: 0 integck: Offset: 1481 Size: 612 Seed: 4160795 R.Off: 1285 integck: Offset: 2093 Size: 6 Seed: 6946586 R.Off: 0 integck: Offset: 2099 Size: 536 Seed: 4160795 R.Off: 1903 integck: Offset: 2635 Size: 1562 Seed: 9845455 R.Off: 0 integck: Offset: 4197 Size: 80 Seed: 702818 R.Off: 0 integck: Offset: 4277 Size: 115 Seed: 9845455 R.Off: 1642 integck: 9 writes integck: ============================================ integck: Write Info: integck: Offset: 826 Size: 357 Seed: 5908448 R.Off: 0 integck: Offset: 4197 Size: 80 Seed: 702818 R.Off: 0 ... </quote> And I would expect the file data listing to include at offset 826 something with a size of 357 and a seed of 5908448. Clearly it is not there (which is already extremely confusing). The point is that file_write_info first updates the raw_write, then verifies the data (passing the new write) and only after that updates the write structure. But in file_check_data only the newly written data is verified (passed as an argument) whilst the save_file() function to dump the file uses the raw_writes to recreate the written data (while raw_writes is only updated after after this check would have succeeded). Several lines to say that in this patch the verify only gets called _after_ the datastructures are updated. Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-12-03ubi-tests: fix pthreads linkingBrian Norris
Technically, '-l' linker options should be included only after the objects which must link to the library. So when we include '-lpthread' in the LDFLAGS variable, it gets placed too early (i.e., before the io_paral.o object), and so the pthread linkage never occurs. The following error probably only shows up with linkers that don't link pthreads by default. $ make tests V=1 ... gcc -I../../ubi-utils//include -I ../../include -lpthread -Wall -Wextra -Wwrite-strings -Wno-sign-compare -ffunction-sections -fdata-sections -Wl,--gc-sections -g -o /home/norris/git/mtd-utils/tests/ubi-tests/io_paral /home/norris/git/mtd-utils/tests/ubi-tests/io_paral.o /home/norris/git/mtd-utils/tests/ubi-tests/helpers.o libubi.a /home/norris/git/mtd-utils/tests/ubi-tests/io_paral.o: In function `main': /home/norris/git/mtd-utils/tests/ubi-tests/io_paral.c:287: undefined reference to `pthread_create' /home/norris/git/mtd-utils/tests/ubi-tests/io_paral.c:295: undefined reference to `pthread_create' /home/norris/git/mtd-utils/tests/ubi-tests/io_paral.c:303: undefined reference to `pthread_join' collect2: ld returned 1 exit status make[2]: *** [/home/norris/git/mtd-utils/tests/ubi-tests/io_paral] Error 1 ... $ ld --version GNU ld (GNU Binutils for Ubuntu) 2.22 ... $ gcc --version gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3 ... Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16ubi-tests: switch to using common.h from the top levelArtem Bityutskiy
Sorry, the commit is huge, I just did not have time to split it. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16ubi-tests: rename common.[ch] to helpers.[ch]Artem Bityutskiy
... to avoid confusion when the local common.h shadows the top-level common.h. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16ubi-tests: ubi_leb_change_start() no longer uses 'dtype'.Bill Pringlemeir
This will not compile for me (due to bit rot?). Maybe the program is never used? Signed-off-by: Bill Pringlemeir <bpringlemeir@nbsps.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-09-25consistency between u_int32_t / off_t / off64_tRichard Genoud
We should use the off_t type instead of off64_t or u_int32_t as its length is controlled by the WITHOUT_LARGEFILE flag. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-09-25tests: io_update correct lseek parameters orderRichard Genoud
There's a typo in lseek parameters order. But, due to the value of SEEK_SET, this commit doesn't introduce a change. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-23ubiattach: introduce max_beb_per1024 in UBI_IOCATTRichard Genoud
The ioctl UBI_IOCATT has been extended with max_beb_per1024 parameter. This parameter is used for adjusting the "maximum expected number of bad blocks per 1024 blocks" for each mtd device. The number of physical erase blocks (PEB) that UBI will reserve for bad block handling is now: whole_flash_chipset__PEB_number * max_beb_per1024 / 1024 This means that for a 4096 PEB NAND device with 3 MTD partitions: mtd0: 512 PEB mtd1: 1536 PEB mtd2: 2048 PEB the commands: ubiattach -m 0 -d 0 -b 20 /dev/ubi_ctrl ubiattach -m 1 -d 1 -b 20 /dev/ubi_ctrl ubiattach -m 2 -d 2 -b 20 /dev/ubi_ctrl will attach mtdx to UBIx and reserve: 80 PEB for bad block handling on UBI0 80 PEB for bad block handling on UBI1 80 PEB for bad block handling on UBI2 => for the whole device, 240 PEB will be reserved for bad block handling. This may seems a waste of space, but as far as the bad blocks can appear every where on a flash device, in the worst case scenario they can all appear in one MTD partition. So the maximum number of expected erase blocks given by the NAND manufacturer should be reserve on each MTD partition. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-22UBI: sync ubi-user.h with kernel v3.6-rc1Richard Genoud
Also remove the eraseblock type support, because kernel commit a65a0eb6d198e058687a9214683bd1c418f20d39 set the dtype parameter as obsolete. Also adjust to some renames: * 'UBI_PROP_DIRECT_WRITE' -> 'UBI_VOL_PROP_DIRECT_WRITE' * 'struct ubi_set_prop_req' -> 'struct ubi_set_vol_prop_req'. * 'UBI_IOCSETPROP' -> 'UBI_IOCSETVOLPROP' Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03stress-test.sh: remove a warningArtem Bityutskiy
If /proc/mtd does not exist, we have this warning: grep: /proc/mtd: No such file or directory Get rid of this. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03stress-test.sh: add mtdram testsArtem Bityutskiy
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03stress-test.sh: support testing without sub-pagesArtem Bityutskiy
Run the tests with VID header at the second page as well for better coverage. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03stress-test.sh: develop the test furtherArtem Bityutskiy
Add a lot of test passes on nandsim with different geometry. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03runtests.sh: print more consistent messagesArtem Bityutskiy
On success we print "SUCCESS", lets print "FAILURE" on failure. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-03stress-test.sh: do not use pipe unnecessarilyArtem Bityutskiy
Use 'grep patt file' instead of cat file | grep patt. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-02tests: ubi: add stress-test.shArtem Bityutskiy
It is not finished yet, but it will run all tests on nandsim and mtdram of different geometry. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-02tests: ubi: clean-up runtests.sh some moreArtem Bityutskiy
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-02tests: ubi: clean-up the runtests.sh scriptArtem Bityutskiy
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2011-10-14tests: checkfs: remove unused codeAndy Shevchenko
There are two variables which are not used anymore. Thos patch removes useless lines and suppresses gcc warnings. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-08-23mtd-utils: use __func__ instead of __FUNCTION__Brian Norris
__func__ is more portable Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-06-29mtd-utils: update .gitignore filesBrian Norris
First, the top-level Makefile should not tell git to ignore sub-level .gitignore files. Second, add simple .gitignores to ignore the executables generated under the various `tests' subdirectories. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-06-29mtd-utils: remove whitespace at end of linesBrian Norris
Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-06-29mtd-tests: io_paral: build error, "variable length strings"Brian Norris
Some compilers will complain about use of strlen() within a static array size declaration. For this type of string, "sizeof() - 1" is equivalent and prevents the build error. Error: io_paral.c:48:13: error: variably modified 'vol_nodes' at file scope Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-06-29mtd-tests: checkfs: fix size_t related warningBrian Norris
Depending on your compiler, size_t may or may not be long unsigned int. Use printf's %zu format to clarify. Warning message: checkfs.c:524:28: warning: format '%lu' expects type 'long unsigned int', but argument 2 has type 'unsigned int' Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-06-27rewrite build system to avoid recursionMike Frysinger
The ubi-utils/src/ subdir is tossed as it just complicates things for no real gain. The dictionary.h header is relocated to the ubi-utils/include/ since other headers in there need it. The top level clean is replaced with a `find -delete` on objects, so it might prune more than necessary, but many projects now do this sort of thing and no one complained there. A "mkdep" helper generates the actual rule, and the variables are used with "foreach" to expand these automatically. The tests subdir is updated only to reflect the ubi-utils source move. Otherwise, it is left untouched as making that non-recursive isn't really worth the effort. While we're gutting things, also through in kbuild style output while building to make things more legible. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-06-25integck: fix build error (MS_DIRSYNC, MS_RELATIME)Brian Norris
Need to include <linux/fs.h>, at least for my build system. Otherwise, you can't build the 'tests'. integck.c: In function ‘parse_mount_options’: integck.c:2862: error: ‘MS_DIRSYNC’ undeclared (first use in this function) integck.c:2862: error: (Each undeclared identifier is reported only once integck.c:2862: error: for each function it appears in.) integck.c:2872: error: ‘MS_RELATIME’ undeclared (first use in this function) Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: add some more error messagesArtem Bityutskiy
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: print error message on errorArtem Bityutskiy
Currently pcv macro print the error message only if we are not doing power cut testing or if we have -v flag. But if we run without -v and an error happen and the error code is not EROFS/EIO, pcv() does not print anything. This patch makes it print the error message in that case as well. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: close files after creationArtem Bityutskiy
The 'file_new()' function should create a file but should not keep it open. There is a different path to open files and keep them open. This patch makes 'file_new()' close newly created files. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: make directory checking workArtem Bityutskiy
This patch makes the directory checking in case of power cut emulation actually work. There were many bugs. Basically, we cannot rely on anything unless the directory is marked as clean. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: add verbose reportingArtem Bityutskiy
Make -v switch control verbose integck output. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: always check clean dataArtem Bityutskiy
Check the clean data after every emulated power cut, not only when 'create_test_data()'/'update_test_data()' succeed. This required some minor re-work. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: introduce a helper function for dir syncArtem Bityutskiy
Add a helper 'sync_directory()' function to synchronize directories. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: print name of directory which we cannot openArtem Bityutskiy
In 'dir_check()' print name of the directory if we fail to open it. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: EIO can also be return in power-cut testingArtem Bityutskiy
Currently when we are doing UBIFS power cut emulation testing we assume that EROFS is returned in case of an emulated power cut event. However, this is not true and sometimes Linux returns EIO to user-space instead. Namely, this happens when we are waiting for write-back to finish. Here is a call trace form kernel 2.6.39-rc7: Call Trace: [<ffffffff810aaa77>] filemap_write_and_wait_range+0x78/0xb1 [<ffffffff8110f34d>] vfs_fsync_range+0x38/0xd3 [<ffffffff8110f42b>] generic_write_sync+0x43/0x65 [<ffffffff810ab0c9>] generic_file_aio_write+0xaa/0xf2 [<ffffffffa02224c9>] ubifs_aio_write+0x13a/0x1a1 [ubifs] [<ffffffff810ed71f>] do_sync_write+0xcb/0x141 [<ffffffff810ee016>] vfs_write+0xb0/0x150 [<ffffffff810ee175>] sys_write+0x48/0x72 [<ffffffff813e0692>] system_call_fastpath+0x16/0x1b 'filemap_fdatawait_range()' returns hard-coded -EIO if a page write-back happens with whatever error code. Thus, this patch teaches integck to handle EIO when doing power cut emulation testing. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-27fs-tests: integck: implement MTD reattachingArtem Bityutskiy
This patch adds -m <mtdnum> option to integck and teaches integck to re-attach the MTD device to UBI in case of an emulated power cut event. This is needed for the new UBI power cut and unstable bits emulation infrastructure: when UBI emulates a power cut the only way to recover form this is to re-attach the MTD device. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>